From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 12:05:51 +0200
Subject: Adding upstream version 5.10.209.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 Documentation/userspace-api/accelerators/ocxl.rst  |  176 +
 Documentation/userspace-api/index.rst              |   33 +
 Documentation/userspace-api/ioctl/cdrom.rst        | 1233 +++
 Documentation/userspace-api/ioctl/hdio.rst         | 1342 ++++
 Documentation/userspace-api/ioctl/index.rst        |   15 +
 .../userspace-api/ioctl/ioctl-decoding.rst         |   31 +
 Documentation/userspace-api/ioctl/ioctl-number.rst |  365 +
 Documentation/userspace-api/iommu.rst              |  209 +
 Documentation/userspace-api/media/Makefile         |   69 +
 .../userspace-api/media/audio.h.rst.exceptions     |   19 +
 .../userspace-api/media/ca.h.rst.exceptions        |   25 +
 .../userspace-api/media/cec.h.rst.exceptions       |  575 ++
 Documentation/userspace-api/media/cec/cec-api.rst  |   46 +
 .../userspace-api/media/cec/cec-func-close.rst     |   43 +
 .../userspace-api/media/cec/cec-func-ioctl.rst     |   63 +
 .../userspace-api/media/cec/cec-func-open.rst      |   74 +
 .../userspace-api/media/cec/cec-func-poll.rst      |   74 +
 .../userspace-api/media/cec/cec-funcs.rst          |   23 +
 .../userspace-api/media/cec/cec-header.rst         |   10 +
 .../userspace-api/media/cec/cec-intro.rst          |   42 +
 .../media/cec/cec-ioc-adap-g-caps.rst              |  146 +
 .../media/cec/cec-ioc-adap-g-conn-info.rst         |  106 +
 .../media/cec/cec-ioc-adap-g-log-addrs.rst         |  367 +
 .../media/cec/cec-ioc-adap-g-phys-addr.rst         |   94 +
 .../userspace-api/media/cec/cec-ioc-dqevent.rst    |  245 +
 .../userspace-api/media/cec/cec-ioc-g-mode.rst     |  294 +
 .../userspace-api/media/cec/cec-ioc-receive.rst    |  382 +
 .../userspace-api/media/cec/cec-pin-error-inj.rst  |  327 +
 Documentation/userspace-api/media/conf_nitpick.py  |  111 +
 .../userspace-api/media/dmx.h.rst.exceptions       |   66 +
 .../userspace-api/media/drivers/cx2341x-uapi.rst   |  179 +
 .../userspace-api/media/drivers/imx-uapi.rst       |  125 +
 .../userspace-api/media/drivers/index.rst          |   39 +
 .../userspace-api/media/drivers/max2175.rst        |   64 +
 .../userspace-api/media/drivers/meye-uapi.rst      |   53 +
 .../userspace-api/media/drivers/omap3isp-uapi.rst  |  208 +
 .../userspace-api/media/drivers/uvcvideo.rst       |  257 +
 .../media/dvb/audio-bilingual-channel-select.rst   |   58 +
 .../media/dvb/audio-channel-select.rst             |   57 +
 .../userspace-api/media/dvb/audio-clear-buffer.rst |   48 +
 .../userspace-api/media/dvb/audio-continue.rst     |   48 +
 .../userspace-api/media/dvb/audio-fclose.rst       |   51 +
 .../userspace-api/media/dvb/audio-fopen.rst        |  103 +
 .../userspace-api/media/dvb/audio-fwrite.rst       |   79 +
 .../media/dvb/audio-get-capabilities.rst           |   54 +
 .../userspace-api/media/dvb/audio-get-status.rst   |   54 +
 .../userspace-api/media/dvb/audio-pause.rst        |   49 +
 .../userspace-api/media/dvb/audio-play.rst         |   48 +
 .../media/dvb/audio-select-source.rst              |   56 +
 .../userspace-api/media/dvb/audio-set-av-sync.rst  |   58 +
 .../media/dvb/audio-set-bypass-mode.rst            |   62 +
 .../userspace-api/media/dvb/audio-set-id.rst       |   59 +
 .../userspace-api/media/dvb/audio-set-mixer.rst    |   53 +
 .../userspace-api/media/dvb/audio-set-mute.rst     |   62 +
 .../media/dvb/audio-set-streamtype.rst             |   66 +
 .../userspace-api/media/dvb/audio-stop.rst         |   48 +
 Documentation/userspace-api/media/dvb/audio.rst    |   27 +
 .../userspace-api/media/dvb/audio_data_types.rst   |  116 +
 .../media/dvb/audio_function_calls.rst             |   30 +
 .../userspace-api/media/dvb/ca-fclose.rst          |   40 +
 Documentation/userspace-api/media/dvb/ca-fopen.rst |   72 +
 .../userspace-api/media/dvb/ca-get-cap.rst         |   46 +
 .../userspace-api/media/dvb/ca-get-descr-info.rst  |   43 +
 .../userspace-api/media/dvb/ca-get-msg.rst         |   50 +
 .../userspace-api/media/dvb/ca-get-slot-info.rst   |   56 +
 Documentation/userspace-api/media/dvb/ca-reset.rst |   43 +
 .../userspace-api/media/dvb/ca-send-msg.rst        |   50 +
 .../userspace-api/media/dvb/ca-set-descr.rst       |   46 +
 Documentation/userspace-api/media/dvb/ca.rst       |   25 +
 .../userspace-api/media/dvb/ca_data_types.rst      |    9 +
 .../userspace-api/media/dvb/ca_function_calls.rst  |   20 +
 .../userspace-api/media/dvb/ca_high_level.rst      |  157 +
 Documentation/userspace-api/media/dvb/demux.rst    |   23 +
 .../userspace-api/media/dvb/dmx-add-pid.rst        |   47 +
 .../userspace-api/media/dvb/dmx-expbuf.rst         |   87 +
 .../userspace-api/media/dvb/dmx-fclose.rst         |   42 +
 .../userspace-api/media/dvb/dmx-fopen.rst          |   88 +
 .../userspace-api/media/dvb/dmx-fread.rst          |   77 +
 .../userspace-api/media/dvb/dmx-fwrite.rst         |   70 +
 .../userspace-api/media/dvb/dmx-get-pes-pids.rst   |   62 +
 .../userspace-api/media/dvb/dmx-get-stc.rst        |   64 +
 Documentation/userspace-api/media/dvb/dmx-mmap.rst |  115 +
 .../userspace-api/media/dvb/dmx-munmap.rst         |   52 +
 Documentation/userspace-api/media/dvb/dmx-qbuf.rst |   85 +
 .../userspace-api/media/dvb/dmx-querybuf.rst       |   64 +
 .../userspace-api/media/dvb/dmx-remove-pid.rst     |   48 +
 .../userspace-api/media/dvb/dmx-reqbufs.rst        |   75 +
 .../media/dvb/dmx-set-buffer-size.rst              |   48 +
 .../userspace-api/media/dvb/dmx-set-filter.rst     |   55 +
 .../userspace-api/media/dvb/dmx-set-pes-filter.rst |   64 +
 .../userspace-api/media/dvb/dmx-start.rst          |   65 +
 Documentation/userspace-api/media/dvb/dmx-stop.rst |   44 +
 .../userspace-api/media/dvb/dmx_fcalls.rst         |   30 +
 .../userspace-api/media/dvb/dmx_types.rst          |    9 +
 .../userspace-api/media/dvb/dvb-fe-read-status.rst |   25 +
 .../userspace-api/media/dvb/dvb-frontend-event.rst |   15 +
 .../media/dvb/dvb-frontend-parameters.rst          |  119 +
 Documentation/userspace-api/media/dvb/dvbapi.rst   |  118 +
 .../userspace-api/media/dvb/dvbproperty.rst        |  126 +
 Documentation/userspace-api/media/dvb/dvbstb.svg   |   17 +
 Documentation/userspace-api/media/dvb/examples.rst |   16 +
 .../userspace-api/media/dvb/fe-bandwidth-t.rst     |   74 +
 .../media/dvb/fe-diseqc-recv-slave-reply.rst       |   47 +
 .../media/dvb/fe-diseqc-reset-overload.rst         |   45 +
 .../media/dvb/fe-diseqc-send-burst.rst             |   50 +
 .../media/dvb/fe-diseqc-send-master-cmd.rst        |   48 +
 .../media/dvb/fe-dishnetwork-send-legacy-cmd.rst   |   53 +
 .../media/dvb/fe-enable-high-lnb-voltage.rst       |   52 +
 .../userspace-api/media/dvb/fe-get-event.rst       |   67 +
 .../userspace-api/media/dvb/fe-get-frontend.rst    |   58 +
 .../userspace-api/media/dvb/fe-get-info.rst        |   59 +
 .../userspace-api/media/dvb/fe-get-property.rst    |   75 +
 .../userspace-api/media/dvb/fe-read-ber.rst        |   49 +
 .../media/dvb/fe-read-signal-strength.rst          |   49 +
 .../userspace-api/media/dvb/fe-read-snr.rst        |   49 +
 .../userspace-api/media/dvb/fe-read-status.rst     |   62 +
 .../media/dvb/fe-read-uncorrected-blocks.rst       |   51 +
 .../media/dvb/fe-set-frontend-tune-mode.rst        |   55 +
 .../userspace-api/media/dvb/fe-set-frontend.rst    |   68 +
 .../userspace-api/media/dvb/fe-set-tone.rst        |   56 +
 .../userspace-api/media/dvb/fe-set-voltage.rst     |   60 +
 .../userspace-api/media/dvb/fe-type-t.rst          |   91 +
 .../media/dvb/fe_property_parameters.rst           | 1007 +++
 .../userspace-api/media/dvb/frontend-header.rst    |    6 +
 .../media/dvb/frontend-property-cable-systems.rst  |   75 +
 .../dvb/frontend-property-satellite-systems.rst    |  105 +
 .../dvb/frontend-property-terrestrial-systems.rst  |  294 +
 .../media/dvb/frontend-stat-properties.rst         |  245 +
 Documentation/userspace-api/media/dvb/frontend.rst |   56 +
 .../userspace-api/media/dvb/frontend_f_close.rst   |   46 +
 .../userspace-api/media/dvb/frontend_f_open.rst    |  104 +
 .../userspace-api/media/dvb/frontend_fcalls.rst    |   24 +
 .../media/dvb/frontend_legacy_api.rst              |   38 +
 .../media/dvb/frontend_legacy_dvbv3_api.rst        |   18 +
 Documentation/userspace-api/media/dvb/headers.rst  |   23 +
 Documentation/userspace-api/media/dvb/intro.rst    |  183 +
 .../userspace-api/media/dvb/legacy_dvb_apis.rst    |   32 +
 .../userspace-api/media/dvb/net-add-if.rst         |   52 +
 .../userspace-api/media/dvb/net-get-if.rst         |   50 +
 .../userspace-api/media/dvb/net-remove-if.rst      |   46 +
 .../userspace-api/media/dvb/net-types.rst          |    9 +
 Documentation/userspace-api/media/dvb/net.rst      |   41 +
 .../media/dvb/query-dvb-frontend-info.rst          |   13 +
 .../userspace-api/media/dvb/video-clear-buffer.rst |   54 +
 .../userspace-api/media/dvb/video-command.rst      |   96 +
 .../userspace-api/media/dvb/video-continue.rst     |   57 +
 .../userspace-api/media/dvb/video-fast-forward.rst |   72 +
 .../userspace-api/media/dvb/video-fclose.rst       |   51 +
 .../userspace-api/media/dvb/video-fopen.rst        |  111 +
 .../userspace-api/media/dvb/video-freeze.rst       |   61 +
 .../userspace-api/media/dvb/video-fwrite.rst       |   79 +
 .../media/dvb/video-get-capabilities.rst           |   61 +
 .../userspace-api/media/dvb/video-get-event.rst    |  105 +
 .../media/dvb/video-get-frame-count.rst            |   65 +
 .../userspace-api/media/dvb/video-get-pts.rst      |   69 +
 .../userspace-api/media/dvb/video-get-size.rst     |   69 +
 .../userspace-api/media/dvb/video-get-status.rst   |   72 +
 .../userspace-api/media/dvb/video-play.rst         |   57 +
 .../media/dvb/video-select-source.rst              |   76 +
 .../userspace-api/media/dvb/video-set-blank.rst    |   64 +
 .../media/dvb/video-set-display-format.rst         |   60 +
 .../userspace-api/media/dvb/video-set-format.rst   |   82 +
 .../media/dvb/video-set-streamtype.rst             |   61 +
 .../userspace-api/media/dvb/video-slowmotion.rst   |   72 +
 .../userspace-api/media/dvb/video-stillpicture.rst |   61 +
 .../userspace-api/media/dvb/video-stop.rst         |   74 +
 .../userspace-api/media/dvb/video-try-command.rst  |   66 +
 Documentation/userspace-api/media/dvb/video.rst    |   36 +
 .../media/dvb/video_function_calls.rst             |   35 +
 .../userspace-api/media/dvb/video_types.rst        |  248 +
 Documentation/userspace-api/media/fdl-appendix.rst |  471 ++
 .../userspace-api/media/frontend.h.rst.exceptions  |  214 +
 Documentation/userspace-api/media/gen-errors.rst   |   96 +
 Documentation/userspace-api/media/glossary.rst     |  205 +
 Documentation/userspace-api/media/index.rst        |   70 +
 Documentation/userspace-api/media/intro.rst        |   46 +
 .../userspace-api/media/lirc.h.rst.exceptions      |   80 +
 .../userspace-api/media/media.h.rst.exceptions     |   32 +
 .../media/mediactl/media-controller-intro.rst      |   33 +
 .../media/mediactl/media-controller-model.rst      |   35 +
 .../media/mediactl/media-controller.rst            |   54 +
 .../media/mediactl/media-func-close.rst            |   43 +
 .../media/mediactl/media-func-ioctl.rst            |   63 +
 .../media/mediactl/media-func-open.rst             |   65 +
 .../userspace-api/media/mediactl/media-funcs.rst   |   26 +
 .../userspace-api/media/mediactl/media-header.rst  |   10 +
 .../media/mediactl/media-ioc-device-info.rst       |  106 +
 .../media/mediactl/media-ioc-enum-entities.rst     |  146 +
 .../media/mediactl/media-ioc-enum-links.rst        |  145 +
 .../media/mediactl/media-ioc-g-topology.rst        |  294 +
 .../media/mediactl/media-ioc-request-alloc.rst     |   65 +
 .../media/mediactl/media-ioc-setup-link.rst        |   65 +
 .../media/mediactl/media-request-ioc-queue.rst     |   77 +
 .../media/mediactl/media-request-ioc-reinit.rst    |   51 +
 .../userspace-api/media/mediactl/media-types.rst   |  418 ++
 .../userspace-api/media/mediactl/request-api.rst   |  253 +
 .../media/mediactl/request-func-close.rst          |   45 +
 .../media/mediactl/request-func-ioctl.rst          |   63 +
 .../media/mediactl/request-func-poll.rst           |   73 +
 .../userspace-api/media/net.h.rst.exceptions       |   13 +
 .../userspace-api/media/rc/keytable.c.rst          |  176 +
 .../userspace-api/media/rc/lirc-dev-intro.rst      |  164 +
 Documentation/userspace-api/media/rc/lirc-dev.rst  |   14 +
 Documentation/userspace-api/media/rc/lirc-func.rst |   27 +
 .../userspace-api/media/rc/lirc-get-features.rst   |  192 +
 .../userspace-api/media/rc/lirc-get-rec-mode.rst   |   69 +
 .../media/rc/lirc-get-rec-resolution.rst           |   47 +
 .../userspace-api/media/rc/lirc-get-send-mode.rst  |   71 +
 .../userspace-api/media/rc/lirc-get-timeout.rst    |   57 +
 .../userspace-api/media/rc/lirc-header.rst         |   10 +
 Documentation/userspace-api/media/rc/lirc-read.rst |   65 +
 .../media/rc/lirc-set-measure-carrier-mode.rst     |   46 +
 .../media/rc/lirc-set-rec-carrier-range.rst        |   49 +
 .../media/rc/lirc-set-rec-carrier.rst              |   46 +
 .../media/rc/lirc-set-rec-timeout-reports.rst      |   49 +
 .../media/rc/lirc-set-rec-timeout.rst              |   55 +
 .../media/rc/lirc-set-send-carrier.rst             |   41 +
 .../media/rc/lirc-set-send-duty-cycle.rst          |   47 +
 .../media/rc/lirc-set-transmitter-mask.rst         |   51 +
 .../media/rc/lirc-set-wideband-receiver.rst        |   56 +
 .../userspace-api/media/rc/lirc-write.rst          |   72 +
 Documentation/userspace-api/media/rc/rc-intro.rst  |   24 +
 Documentation/userspace-api/media/rc/rc-protos.rst |  454 ++
 .../userspace-api/media/rc/rc-sysfs-nodes.rst      |  144 +
 .../userspace-api/media/rc/rc-table-change.rst     |   18 +
 Documentation/userspace-api/media/rc/rc-tables.rst |  759 ++
 .../userspace-api/media/rc/remote_controllers.rst  |   51 +
 .../userspace-api/media/typical_media_device.svg   |  107 +
 Documentation/userspace-api/media/v4l/app-pri.rst  |   30 +
 Documentation/userspace-api/media/v4l/async.rst    |    9 +
 Documentation/userspace-api/media/v4l/audio.rst    |   97 +
 Documentation/userspace-api/media/v4l/bayer.svg    |   30 +
 Documentation/userspace-api/media/v4l/biblio.rst   |  409 +
 Documentation/userspace-api/media/v4l/buffer.rst   |  807 ++
 .../userspace-api/media/v4l/capture-example.rst    |   13 +
 .../userspace-api/media/v4l/capture.c.rst          |  664 ++
 .../userspace-api/media/v4l/colorspaces-defs.rst   |  175 +
 .../media/v4l/colorspaces-details.rst              |  805 ++
 .../userspace-api/media/v4l/colorspaces.rst        |  163 +
 .../userspace-api/media/v4l/common-defs.rst        |   13 +
 Documentation/userspace-api/media/v4l/common.rst   |   58 +
 Documentation/userspace-api/media/v4l/compat.rst   |   18 +
 .../userspace-api/media/v4l/constraints.svg        |   11 +
 Documentation/userspace-api/media/v4l/control.rst  |  505 ++
 Documentation/userspace-api/media/v4l/crop.rst     |  317 +
 Documentation/userspace-api/media/v4l/crop.svg     |  281 +
 .../userspace-api/media/v4l/depth-formats.rst      |   17 +
 .../userspace-api/media/v4l/dev-capture.rst        |  101 +
 .../userspace-api/media/v4l/dev-decoder.rst        | 1103 +++
 .../userspace-api/media/v4l/dev-encoder.rst        |  729 ++
 .../userspace-api/media/v4l/dev-event.rst          |   47 +
 .../userspace-api/media/v4l/dev-mem2mem.rst        |   43 +
 Documentation/userspace-api/media/v4l/dev-meta.rst |   67 +
 Documentation/userspace-api/media/v4l/dev-osd.rst  |  150 +
 .../userspace-api/media/v4l/dev-output.rst         |   98 +
 .../userspace-api/media/v4l/dev-overlay.rst        |  321 +
 .../userspace-api/media/v4l/dev-radio.rst          |   52 +
 .../userspace-api/media/v4l/dev-raw-vbi.rst        |  292 +
 Documentation/userspace-api/media/v4l/dev-rds.rst  |  178 +
 Documentation/userspace-api/media/v4l/dev-sdr.rst  |  107 +
 .../userspace-api/media/v4l/dev-sliced-vbi.rst     |  645 ++
 .../media/v4l/dev-stateless-decoder.rst            |  424 ++
 .../userspace-api/media/v4l/dev-subdev.rst         |  501 ++
 .../userspace-api/media/v4l/dev-touch.rst          |   56 +
 Documentation/userspace-api/media/v4l/devices.rst  |   26 +
 Documentation/userspace-api/media/v4l/diff-v4l.rst |  659 ++
 Documentation/userspace-api/media/v4l/dmabuf.rst   |  162 +
 .../userspace-api/media/v4l/dv-timings.rst         |   38 +
 .../userspace-api/media/v4l/ext-ctrls-camera.rst   |  659 ++
 .../userspace-api/media/v4l/ext-ctrls-codec.rst    | 4387 +++++++++++
 .../userspace-api/media/v4l/ext-ctrls-detect.rst   |   64 +
 .../userspace-api/media/v4l/ext-ctrls-dv.rst       |  159 +
 .../userspace-api/media/v4l/ext-ctrls-flash.rst    |  185 +
 .../userspace-api/media/v4l/ext-ctrls-fm-rx.rst    |   88 +
 .../userspace-api/media/v4l/ext-ctrls-fm-tx.rst    |  181 +
 .../media/v4l/ext-ctrls-image-process.rst          |   56 +
 .../media/v4l/ext-ctrls-image-source.rst           |   60 +
 .../userspace-api/media/v4l/ext-ctrls-jpeg.rst     |  106 +
 .../userspace-api/media/v4l/ext-ctrls-rf-tuner.rst |   89 +
 .../userspace-api/media/v4l/extended-controls.rst  |  173 +
 .../userspace-api/media/v4l/field-order.rst        |  165 +
 .../userspace-api/media/v4l/fieldseq_bt.svg        | 2612 +++++++
 .../userspace-api/media/v4l/fieldseq_tb.svg        | 2609 +++++++
 Documentation/userspace-api/media/v4l/format.rst   |   91 +
 Documentation/userspace-api/media/v4l/fourcc.rst   |   32 +
 .../userspace-api/media/v4l/func-close.rst         |   45 +
 .../userspace-api/media/v4l/func-ioctl.rst         |   58 +
 .../userspace-api/media/v4l/func-mmap.rst          |  137 +
 .../userspace-api/media/v4l/func-munmap.rst        |   54 +
 .../userspace-api/media/v4l/func-open.rst          |   79 +
 .../userspace-api/media/v4l/func-poll.rst          |  113 +
 .../userspace-api/media/v4l/func-read.rst          |  130 +
 .../userspace-api/media/v4l/func-select.rst        |  116 +
 .../userspace-api/media/v4l/func-write.rst         |   81 +
 .../userspace-api/media/v4l/hist-v4l2.rst          | 1276 ++++
 .../userspace-api/media/v4l/hsv-formats.rst        |   19 +
 Documentation/userspace-api/media/v4l/io.rst       |   51 +
 .../media/v4l/libv4l-introduction.rst              |  180 +
 Documentation/userspace-api/media/v4l/libv4l.rst   |   13 +
 .../userspace-api/media/v4l/meta-formats.rst       |   21 +
 Documentation/userspace-api/media/v4l/mmap.rst     |  285 +
 Documentation/userspace-api/media/v4l/nv12mt.svg   |  451 ++
 .../userspace-api/media/v4l/nv12mt_example.svg     | 1590 ++++
 Documentation/userspace-api/media/v4l/open.rst     |  238 +
 Documentation/userspace-api/media/v4l/pipeline.dot |   14 +
 .../userspace-api/media/v4l/pixfmt-bayer.rst       |   32 +
 .../userspace-api/media/v4l/pixfmt-cnf4.rst        |   31 +
 .../userspace-api/media/v4l/pixfmt-compressed.rst  |  225 +
 .../userspace-api/media/v4l/pixfmt-grey.rst        |   44 +
 .../userspace-api/media/v4l/pixfmt-indexed.rst     |   47 +
 .../userspace-api/media/v4l/pixfmt-intro.rst       |   51 +
 .../userspace-api/media/v4l/pixfmt-inzi.rst        |   82 +
 .../userspace-api/media/v4l/pixfmt-m420.rst        |  126 +
 .../userspace-api/media/v4l/pixfmt-meta-d4xx.rst   |  213 +
 .../media/v4l/pixfmt-meta-intel-ipu3.rst           |   81 +
 .../userspace-api/media/v4l/pixfmt-meta-rkisp1.rst |   49 +
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diff --git a/Documentation/userspace-api/accelerators/ocxl.rst b/Documentation/userspace-api/accelerators/ocxl.rst
new file mode 100644
index 000000000..14cefc020
--- /dev/null
+++ b/Documentation/userspace-api/accelerators/ocxl.rst
@@ -0,0 +1,176 @@
+========================================================
+OpenCAPI (Open Coherent Accelerator Processor Interface)
+========================================================
+
+OpenCAPI is an interface between processors and accelerators. It aims
+at being low-latency and high-bandwidth. The specification is
+developed by the `OpenCAPI Consortium <http://opencapi.org/>`_.
+
+It allows an accelerator (which could be a FPGA, ASICs, ...) to access
+the host memory coherently, using virtual addresses. An OpenCAPI
+device can also host its own memory, that can be accessed from the
+host.
+
+OpenCAPI is known in linux as 'ocxl', as the open, processor-agnostic
+evolution of 'cxl' (the driver for the IBM CAPI interface for
+powerpc), which was named that way to avoid confusion with the ISDN
+CAPI subsystem.
+
+
+High-level view
+===============
+
+OpenCAPI defines a Data Link Layer (DL) and Transaction Layer (TL), to
+be implemented on top of a physical link. Any processor or device
+implementing the DL and TL can start sharing memory.
+
+::
+
+  +-----------+                         +-------------+
+  |           |                         |             |
+  |           |                         | Accelerated |
+  | Processor |                         |  Function   |
+  |           |  +--------+             |    Unit     |  +--------+
+  |           |--| Memory |             |    (AFU)    |--| Memory |
+  |           |  +--------+             |             |  +--------+
+  +-----------+                         +-------------+
+       |                                       |
+  +-----------+                         +-------------+
+  |    TL     |                         |    TLX      |
+  +-----------+                         +-------------+
+       |                                       |
+  +-----------+                         +-------------+
+  |    DL     |                         |    DLX      |
+  +-----------+                         +-------------+
+       |                                       |
+       |                   PHY                 |
+       +---------------------------------------+
+
+
+
+Device discovery
+================
+
+OpenCAPI relies on a PCI-like configuration space, implemented on the
+device. So the host can discover AFUs by querying the config space.
+
+OpenCAPI devices in Linux are treated like PCI devices (with a few
+caveats). The firmware is expected to abstract the hardware as if it
+was a PCI link. A lot of the existing PCI infrastructure is reused:
+devices are scanned and BARs are assigned during the standard PCI
+enumeration. Commands like 'lspci' can therefore be used to see what
+devices are available.
+
+The configuration space defines the AFU(s) that can be found on the
+physical adapter, such as its name, how many memory contexts it can
+work with, the size of its MMIO areas, ...
+
+
+
+MMIO
+====
+
+OpenCAPI defines two MMIO areas for each AFU:
+
+* the global MMIO area, with registers pertinent to the whole AFU.
+* a per-process MMIO area, which has a fixed size for each context.
+
+
+
+AFU interrupts
+==============
+
+OpenCAPI includes the possibility for an AFU to send an interrupt to a
+host process. It is done through a 'intrp_req' defined in the
+Transaction Layer, specifying a 64-bit object handle which defines the
+interrupt.
+
+The driver allows a process to allocate an interrupt and obtain its
+64-bit object handle, that can be passed to the AFU.
+
+
+
+char devices
+============
+
+The driver creates one char device per AFU found on the physical
+device. A physical device may have multiple functions and each
+function can have multiple AFUs. At the time of this writing though,
+it has only been tested with devices exporting only one AFU.
+
+Char devices can be found in /dev/ocxl/ and are named as:
+/dev/ocxl/<AFU name>.<location>.<index>
+
+where <AFU name> is a max 20-character long name, as found in the
+config space of the AFU.
+<location> is added by the driver and can help distinguish devices
+when a system has more than one instance of the same OpenCAPI device.
+<index> is also to help distinguish AFUs in the unlikely case where a
+device carries multiple copies of the same AFU.
+
+
+
+Sysfs class
+===========
+
+An ocxl class is added for the devices representing the AFUs. See
+/sys/class/ocxl. The layout is described in
+Documentation/ABI/testing/sysfs-class-ocxl
+
+
+
+User API
+========
+
+open
+----
+
+Based on the AFU definition found in the config space, an AFU may
+support working with more than one memory context, in which case the
+associated char device may be opened multiple times by different
+processes.
+
+
+ioctl
+-----
+
+OCXL_IOCTL_ATTACH:
+
+  Attach the memory context of the calling process to the AFU so that
+  the AFU can access its memory.
+
+OCXL_IOCTL_IRQ_ALLOC:
+
+  Allocate an AFU interrupt and return an identifier.
+
+OCXL_IOCTL_IRQ_FREE:
+
+  Free a previously allocated AFU interrupt.
+
+OCXL_IOCTL_IRQ_SET_FD:
+
+  Associate an event fd to an AFU interrupt so that the user process
+  can be notified when the AFU sends an interrupt.
+
+OCXL_IOCTL_GET_METADATA:
+
+  Obtains configuration information from the card, such at the size of
+  MMIO areas, the AFU version, and the PASID for the current context.
+
+OCXL_IOCTL_ENABLE_P9_WAIT:
+
+  Allows the AFU to wake a userspace thread executing 'wait'. Returns
+  information to userspace to allow it to configure the AFU. Note that
+  this is only available on POWER9.
+
+OCXL_IOCTL_GET_FEATURES:
+
+  Reports on which CPU features that affect OpenCAPI are usable from
+  userspace.
+
+
+mmap
+----
+
+A process can mmap the per-process MMIO area for interactions with the
+AFU.
diff --git a/Documentation/userspace-api/index.rst b/Documentation/userspace-api/index.rst
new file mode 100644
index 000000000..acd2cc2a5
--- /dev/null
+++ b/Documentation/userspace-api/index.rst
@@ -0,0 +1,33 @@
+=====================================
+The Linux kernel user-space API guide
+=====================================
+
+.. _man-pages: https://www.kernel.org/doc/man-pages/
+
+While much of the kernel's user-space API is documented elsewhere
+(particularly in the man-pages_ project), some user-space information can
+also be found in the kernel tree itself.  This manual is intended to be the
+place where this information is gathered.
+
+.. class:: toc-title
+
+	   Table of contents
+
+.. toctree::
+   :maxdepth: 2
+
+   no_new_privs
+   seccomp_filter
+   unshare
+   spec_ctrl
+   accelerators/ocxl
+   ioctl/index
+   iommu
+   media/index
+
+.. only::  subproject and html
+
+   Indices
+   =======
+
+   * :ref:`genindex`
diff --git a/Documentation/userspace-api/ioctl/cdrom.rst b/Documentation/userspace-api/ioctl/cdrom.rst
new file mode 100644
index 000000000..3b4c0506d
--- /dev/null
+++ b/Documentation/userspace-api/ioctl/cdrom.rst
@@ -0,0 +1,1233 @@
+============================
+Summary of CDROM ioctl calls
+============================
+
+- Edward A. Falk <efalk@google.com>
+
+November, 2004
+
+This document attempts to describe the ioctl(2) calls supported by
+the CDROM layer.  These are by-and-large implemented (as of Linux 2.6)
+in drivers/cdrom/cdrom.c and drivers/block/scsi_ioctl.c
+
+ioctl values are listed in <linux/cdrom.h>.  As of this writing, they
+are as follows:
+
+	======================	===============================================
+	CDROMPAUSE		Pause Audio Operation
+	CDROMRESUME		Resume paused Audio Operation
+	CDROMPLAYMSF		Play Audio MSF (struct cdrom_msf)
+	CDROMPLAYTRKIND		Play Audio Track/index (struct cdrom_ti)
+	CDROMREADTOCHDR		Read TOC header (struct cdrom_tochdr)
+	CDROMREADTOCENTRY	Read TOC entry (struct cdrom_tocentry)
+	CDROMSTOP		Stop the cdrom drive
+	CDROMSTART		Start the cdrom drive
+	CDROMEJECT		Ejects the cdrom media
+	CDROMVOLCTRL		Control output volume (struct cdrom_volctrl)
+	CDROMSUBCHNL		Read subchannel data (struct cdrom_subchnl)
+	CDROMREADMODE2		Read CDROM mode 2 data (2336 Bytes)
+				(struct cdrom_read)
+	CDROMREADMODE1		Read CDROM mode 1 data (2048 Bytes)
+				(struct cdrom_read)
+	CDROMREADAUDIO		(struct cdrom_read_audio)
+	CDROMEJECT_SW		enable(1)/disable(0) auto-ejecting
+	CDROMMULTISESSION	Obtain the start-of-last-session
+				address of multi session disks
+				(struct cdrom_multisession)
+	CDROM_GET_MCN		Obtain the "Universal Product Code"
+				if available (struct cdrom_mcn)
+	CDROM_GET_UPC		Deprecated, use CDROM_GET_MCN instead.
+	CDROMRESET		hard-reset the drive
+	CDROMVOLREAD		Get the drive's volume setting
+				(struct cdrom_volctrl)
+	CDROMREADRAW		read data in raw mode (2352 Bytes)
+				(struct cdrom_read)
+	CDROMREADCOOKED		read data in cooked mode
+	CDROMSEEK		seek msf address
+	CDROMPLAYBLK		scsi-cd only, (struct cdrom_blk)
+	CDROMREADALL		read all 2646 bytes
+	CDROMGETSPINDOWN	return 4-bit spindown value
+	CDROMSETSPINDOWN	set 4-bit spindown value
+	CDROMCLOSETRAY		pendant of CDROMEJECT
+	CDROM_SET_OPTIONS	Set behavior options
+	CDROM_CLEAR_OPTIONS	Clear behavior options
+	CDROM_SELECT_SPEED	Set the CD-ROM speed
+	CDROM_SELECT_DISC	Select disc (for juke-boxes)
+	CDROM_MEDIA_CHANGED	Check is media changed
+	CDROM_DRIVE_STATUS	Get tray position, etc.
+	CDROM_DISC_STATUS	Get disc type, etc.
+	CDROM_CHANGER_NSLOTS	Get number of slots
+	CDROM_LOCKDOOR		lock or unlock door
+	CDROM_DEBUG		Turn debug messages on/off
+	CDROM_GET_CAPABILITY	get capabilities
+	CDROMAUDIOBUFSIZ	set the audio buffer size
+	DVD_READ_STRUCT		Read structure
+	DVD_WRITE_STRUCT	Write structure
+	DVD_AUTH		Authentication
+	CDROM_SEND_PACKET	send a packet to the drive
+	CDROM_NEXT_WRITABLE	get next writable block
+	CDROM_LAST_WRITTEN	get last block written on disc
+	======================	===============================================
+
+
+The information that follows was determined from reading kernel source
+code.  It is likely that some corrections will be made over time.
+
+------------------------------------------------------------------------------
+
+General:
+
+	Unless otherwise specified, all ioctl calls return 0 on success
+	and -1 with errno set to an appropriate value on error.  (Some
+	ioctls return non-negative data values.)
+
+	Unless otherwise specified, all ioctl calls return -1 and set
+	errno to EFAULT on a failed attempt to copy data to or from user
+	address space.
+
+	Individual drivers may return error codes not listed here.
+
+	Unless otherwise specified, all data structures and constants
+	are defined in <linux/cdrom.h>
+
+------------------------------------------------------------------------------
+
+
+CDROMPAUSE
+	Pause Audio Operation
+
+
+	usage::
+
+	  ioctl(fd, CDROMPAUSE, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+
+CDROMRESUME
+	Resume paused Audio Operation
+
+
+	usage::
+
+	  ioctl(fd, CDROMRESUME, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+
+CDROMPLAYMSF
+	Play Audio MSF
+
+	(struct cdrom_msf)
+
+
+	usage::
+
+	  struct cdrom_msf msf;
+
+	  ioctl(fd, CDROMPLAYMSF, &msf);
+
+	inputs:
+		cdrom_msf structure, describing a segment of music to play
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+	notes:
+		- MSF stands for minutes-seconds-frames
+		- LBA stands for logical block address
+		- Segment is described as start and end times, where each time
+		  is described as minutes:seconds:frames.
+		  A frame is 1/75 of a second.
+
+
+CDROMPLAYTRKIND
+	Play Audio Track/index
+
+	(struct cdrom_ti)
+
+
+	usage::
+
+	  struct cdrom_ti ti;
+
+	  ioctl(fd, CDROMPLAYTRKIND, &ti);
+
+	inputs:
+		cdrom_ti structure, describing a segment of music to play
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+	notes:
+		- Segment is described as start and end times, where each time
+		  is described as a track and an index.
+
+
+
+CDROMREADTOCHDR
+	Read TOC header
+
+	(struct cdrom_tochdr)
+
+
+	usage::
+
+	  cdrom_tochdr header;
+
+	  ioctl(fd, CDROMREADTOCHDR, &header);
+
+	inputs:
+		cdrom_tochdr structure
+
+
+	outputs:
+		cdrom_tochdr structure
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+
+
+CDROMREADTOCENTRY
+	Read TOC entry
+
+	(struct cdrom_tocentry)
+
+
+	usage::
+
+	  struct cdrom_tocentry entry;
+
+	  ioctl(fd, CDROMREADTOCENTRY, &entry);
+
+	inputs:
+		cdrom_tocentry structure
+
+
+	outputs:
+		cdrom_tocentry structure
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+	  - EINVAL	entry.cdte_format not CDROM_MSF or CDROM_LBA
+	  - EINVAL	requested track out of bounds
+	  - EIO		I/O error reading TOC
+
+	notes:
+		- TOC stands for Table Of Contents
+		- MSF stands for minutes-seconds-frames
+		- LBA stands for logical block address
+
+
+
+CDROMSTOP
+	Stop the cdrom drive
+
+
+	usage::
+
+	  ioctl(fd, CDROMSTOP, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+	notes:
+	  - Exact interpretation of this ioctl depends on the device,
+	    but most seem to spin the drive down.
+
+
+CDROMSTART
+	Start the cdrom drive
+
+
+	usage::
+
+	  ioctl(fd, CDROMSTART, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+	notes:
+	  - Exact interpretation of this ioctl depends on the device,
+	    but most seem to spin the drive up and/or close the tray.
+	    Other devices ignore the ioctl completely.
+
+
+CDROMEJECT
+	- Ejects the cdrom media
+
+
+	usage::
+
+	  ioctl(fd, CDROMEJECT, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		none
+
+
+	error returns:
+	  - ENOSYS	cd drive not capable of ejecting
+	  - EBUSY	other processes are accessing drive, or door is locked
+
+	notes:
+		- See CDROM_LOCKDOOR, below.
+
+
+
+
+CDROMCLOSETRAY
+	pendant of CDROMEJECT
+
+
+	usage::
+
+	  ioctl(fd, CDROMCLOSETRAY, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		none
+
+
+	error returns:
+	  - ENOSYS	cd drive not capable of closing the tray
+	  - EBUSY	other processes are accessing drive, or door is locked
+
+	notes:
+		- See CDROM_LOCKDOOR, below.
+
+
+
+
+CDROMVOLCTRL
+	Control output volume (struct cdrom_volctrl)
+
+
+	usage::
+
+	  struct cdrom_volctrl volume;
+
+	  ioctl(fd, CDROMVOLCTRL, &volume);
+
+	inputs:
+		cdrom_volctrl structure containing volumes for up to 4
+		channels.
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+
+
+CDROMVOLREAD
+	Get the drive's volume setting
+
+	(struct cdrom_volctrl)
+
+
+	usage::
+
+	  struct cdrom_volctrl volume;
+
+	  ioctl(fd, CDROMVOLREAD, &volume);
+
+	inputs:
+		none
+
+
+	outputs:
+		The current volume settings.
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+
+
+
+CDROMSUBCHNL
+	Read subchannel data
+
+	(struct cdrom_subchnl)
+
+
+	usage::
+
+	  struct cdrom_subchnl q;
+
+	  ioctl(fd, CDROMSUBCHNL, &q);
+
+	inputs:
+		cdrom_subchnl structure
+
+
+	outputs:
+		cdrom_subchnl structure
+
+
+	error return:
+	  - ENOSYS	cd drive not audio-capable.
+	  - EINVAL	format not CDROM_MSF or CDROM_LBA
+
+	notes:
+		- Format is converted to CDROM_MSF or CDROM_LBA
+		  as per user request on return
+
+
+
+CDROMREADRAW
+	read data in raw mode (2352 Bytes)
+
+	(struct cdrom_read)
+
+	usage::
+
+	  union {
+
+	    struct cdrom_msf msf;		/* input */
+	    char buffer[CD_FRAMESIZE_RAW];	/* return */
+	  } arg;
+	  ioctl(fd, CDROMREADRAW, &arg);
+
+	inputs:
+		cdrom_msf structure indicating an address to read.
+
+		Only the start values are significant.
+
+	outputs:
+		Data written to address provided by user.
+
+
+	error return:
+	  - EINVAL	address less than 0, or msf less than 0:2:0
+	  - ENOMEM	out of memory
+
+	notes:
+		- As of 2.6.8.1, comments in <linux/cdrom.h> indicate that this
+		  ioctl accepts a cdrom_read structure, but actual source code
+		  reads a cdrom_msf structure and writes a buffer of data to
+		  the same address.
+
+		- MSF values are converted to LBA values via this formula::
+
+		    lba = (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
+
+
+
+
+CDROMREADMODE1
+	Read CDROM mode 1 data (2048 Bytes)
+
+	(struct cdrom_read)
+
+	notes:
+		Identical to CDROMREADRAW except that block size is
+		CD_FRAMESIZE (2048) bytes
+
+
+
+CDROMREADMODE2
+	Read CDROM mode 2 data (2336 Bytes)
+
+	(struct cdrom_read)
+
+	notes:
+		Identical to CDROMREADRAW except that block size is
+		CD_FRAMESIZE_RAW0 (2336) bytes
+
+
+
+CDROMREADAUDIO
+	(struct cdrom_read_audio)
+
+	usage::
+
+	  struct cdrom_read_audio ra;
+
+	  ioctl(fd, CDROMREADAUDIO, &ra);
+
+	inputs:
+		cdrom_read_audio structure containing read start
+		point and length
+
+	outputs:
+		audio data, returned to buffer indicated by ra
+
+
+	error return:
+	  - EINVAL	format not CDROM_MSF or CDROM_LBA
+	  - EINVAL	nframes not in range [1 75]
+	  - ENXIO	drive has no queue (probably means invalid fd)
+	  - ENOMEM	out of memory
+
+
+CDROMEJECT_SW
+	enable(1)/disable(0) auto-ejecting
+
+
+	usage::
+
+	  int val;
+
+	  ioctl(fd, CDROMEJECT_SW, val);
+
+	inputs:
+		Flag specifying auto-eject flag.
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	Drive is not capable of ejecting.
+	  - EBUSY	Door is locked
+
+
+
+
+CDROMMULTISESSION
+	Obtain the start-of-last-session address of multi session disks
+
+	(struct cdrom_multisession)
+
+	usage::
+
+	  struct cdrom_multisession ms_info;
+
+	  ioctl(fd, CDROMMULTISESSION, &ms_info);
+
+	inputs:
+		cdrom_multisession structure containing desired
+
+	  format.
+
+	outputs:
+		cdrom_multisession structure is filled with last_session
+		information.
+
+	error return:
+	  - EINVAL	format not CDROM_MSF or CDROM_LBA
+
+
+CDROM_GET_MCN
+	Obtain the "Universal Product Code"
+	if available
+
+	(struct cdrom_mcn)
+
+
+	usage::
+
+	  struct cdrom_mcn mcn;
+
+	  ioctl(fd, CDROM_GET_MCN, &mcn);
+
+	inputs:
+		none
+
+
+	outputs:
+		Universal Product Code
+
+
+	error return:
+	  - ENOSYS	Drive is not capable of reading MCN data.
+
+	notes:
+		- Source code comments state::
+
+		    The following function is implemented, although very few
+		    audio discs give Universal Product Code information, which
+		    should just be the Medium Catalog Number on the box.  Note,
+		    that the way the code is written on the CD is /not/ uniform
+		    across all discs!
+
+
+
+
+CDROM_GET_UPC
+	CDROM_GET_MCN  (deprecated)
+
+
+	Not implemented, as of 2.6.8.1
+
+
+
+CDROMRESET
+	hard-reset the drive
+
+
+	usage::
+
+	  ioctl(fd, CDROMRESET, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - ENOSYS	Drive is not capable of resetting.
+
+
+
+
+CDROMREADCOOKED
+	read data in cooked mode
+
+
+	usage::
+
+	  u8 buffer[CD_FRAMESIZE]
+
+	  ioctl(fd, CDROMREADCOOKED, buffer);
+
+	inputs:
+		none
+
+
+	outputs:
+		2048 bytes of data, "cooked" mode.
+
+
+	notes:
+		Not implemented on all drives.
+
+
+
+
+
+CDROMREADALL
+	read all 2646 bytes
+
+
+	Same as CDROMREADCOOKED, but reads 2646 bytes.
+
+
+
+CDROMSEEK
+	seek msf address
+
+
+	usage::
+
+	  struct cdrom_msf msf;
+
+	  ioctl(fd, CDROMSEEK, &msf);
+
+	inputs:
+		MSF address to seek to.
+
+
+	outputs:
+		none
+
+
+
+
+CDROMPLAYBLK
+	scsi-cd only
+
+	(struct cdrom_blk)
+
+
+	usage::
+
+	  struct cdrom_blk blk;
+
+	  ioctl(fd, CDROMPLAYBLK, &blk);
+
+	inputs:
+		Region to play
+
+
+	outputs:
+		none
+
+
+
+
+CDROMGETSPINDOWN
+	usage::
+
+	  char spindown;
+
+	  ioctl(fd, CDROMGETSPINDOWN, &spindown);
+
+	inputs:
+		none
+
+
+	outputs:
+		The value of the current 4-bit spindown value.
+
+
+
+
+
+CDROMSETSPINDOWN
+	usage::
+
+	  char spindown
+
+	  ioctl(fd, CDROMSETSPINDOWN, &spindown);
+
+	inputs:
+		4-bit value used to control spindown (TODO: more detail here)
+
+
+	outputs:
+		none
+
+
+
+
+
+
+CDROM_SET_OPTIONS
+	Set behavior options
+
+
+	usage::
+
+	  int options;
+
+	  ioctl(fd, CDROM_SET_OPTIONS, options);
+
+	inputs:
+		New values for drive options.  The logical 'or' of:
+
+	    ==============      ==================================
+	    CDO_AUTO_CLOSE	close tray on first open(2)
+	    CDO_AUTO_EJECT	open tray on last release
+	    CDO_USE_FFLAGS	use O_NONBLOCK information on open
+	    CDO_LOCK		lock tray on open files
+	    CDO_CHECK_TYPE	check type on open for data
+	    ==============      ==================================
+
+	outputs:
+		Returns the resulting options settings in the
+		ioctl return value.  Returns -1 on error.
+
+	error return:
+	  - ENOSYS	selected option(s) not supported by drive.
+
+
+
+
+CDROM_CLEAR_OPTIONS
+	Clear behavior options
+
+
+	Same as CDROM_SET_OPTIONS, except that selected options are
+	turned off.
+
+
+
+CDROM_SELECT_SPEED
+	Set the CD-ROM speed
+
+
+	usage::
+
+	  int speed;
+
+	  ioctl(fd, CDROM_SELECT_SPEED, speed);
+
+	inputs:
+		New drive speed.
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - ENOSYS	speed selection not supported by drive.
+
+
+
+CDROM_SELECT_DISC
+	Select disc (for juke-boxes)
+
+
+	usage::
+
+	  int disk;
+
+	  ioctl(fd, CDROM_SELECT_DISC, disk);
+
+	inputs:
+		Disk to load into drive.
+
+
+	outputs:
+		none
+
+
+	error return:
+	  - EINVAL	Disk number beyond capacity of drive
+
+
+
+CDROM_MEDIA_CHANGED
+	Check is media changed
+
+
+	usage::
+
+	  int slot;
+
+	  ioctl(fd, CDROM_MEDIA_CHANGED, slot);
+
+	inputs:
+		Slot number to be tested, always zero except for jukeboxes.
+
+		May also be special values CDSL_NONE or CDSL_CURRENT
+
+	outputs:
+		Ioctl return value is 0 or 1 depending on whether the media
+
+	  has been changed, or -1 on error.
+
+	error returns:
+	  - ENOSYS	Drive can't detect media change
+	  - EINVAL	Slot number beyond capacity of drive
+	  - ENOMEM	Out of memory
+
+
+
+CDROM_DRIVE_STATUS
+	Get tray position, etc.
+
+
+	usage::
+
+	  int slot;
+
+	  ioctl(fd, CDROM_DRIVE_STATUS, slot);
+
+	inputs:
+		Slot number to be tested, always zero except for jukeboxes.
+
+		May also be special values CDSL_NONE or CDSL_CURRENT
+
+	outputs:
+		Ioctl return value will be one of the following values
+
+	  from <linux/cdrom.h>:
+
+	    =================== ==========================
+	    CDS_NO_INFO		Information not available.
+	    CDS_NO_DISC
+	    CDS_TRAY_OPEN
+	    CDS_DRIVE_NOT_READY
+	    CDS_DISC_OK
+	    -1			error
+	    =================== ==========================
+
+	error returns:
+	  - ENOSYS	Drive can't detect drive status
+	  - EINVAL	Slot number beyond capacity of drive
+	  - ENOMEM	Out of memory
+
+
+
+
+CDROM_DISC_STATUS
+	Get disc type, etc.
+
+
+	usage::
+
+	  ioctl(fd, CDROM_DISC_STATUS, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		Ioctl return value will be one of the following values
+
+	  from <linux/cdrom.h>:
+
+	    - CDS_NO_INFO
+	    - CDS_AUDIO
+	    - CDS_MIXED
+	    - CDS_XA_2_2
+	    - CDS_XA_2_1
+	    - CDS_DATA_1
+
+	error returns:
+		none at present
+
+	notes:
+	    - Source code comments state::
+
+
+		Ok, this is where problems start.  The current interface for
+		the CDROM_DISC_STATUS ioctl is flawed.  It makes the false
+		assumption that CDs are all CDS_DATA_1 or all CDS_AUDIO, etc.
+		Unfortunately, while this is often the case, it is also
+		very common for CDs to have some tracks with data, and some
+		tracks with audio.	Just because I feel like it, I declare
+		the following to be the best way to cope.  If the CD has
+		ANY data tracks on it, it will be returned as a data CD.
+		If it has any XA tracks, I will return it as that.	Now I
+		could simplify this interface by combining these returns with
+		the above, but this more clearly demonstrates the problem
+		with the current interface.  Too bad this wasn't designed
+		to use bitmasks...	       -Erik
+
+		Well, now we have the option CDS_MIXED: a mixed-type CD.
+		User level programmers might feel the ioctl is not very
+		useful.
+				---david
+
+
+
+
+CDROM_CHANGER_NSLOTS
+	Get number of slots
+
+
+	usage::
+
+	  ioctl(fd, CDROM_CHANGER_NSLOTS, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		The ioctl return value will be the number of slots in a
+		CD changer.  Typically 1 for non-multi-disk devices.
+
+	error returns:
+		none
+
+
+
+CDROM_LOCKDOOR
+	lock or unlock door
+
+
+	usage::
+
+	  int lock;
+
+	  ioctl(fd, CDROM_LOCKDOOR, lock);
+
+	inputs:
+		Door lock flag, 1=lock, 0=unlock
+
+
+	outputs:
+		none
+
+
+	error returns:
+	  - EDRIVE_CANT_DO_THIS
+
+				Door lock function not supported.
+	  - EBUSY
+
+				Attempt to unlock when multiple users
+				have the drive open and not CAP_SYS_ADMIN
+
+	notes:
+		As of 2.6.8.1, the lock flag is a global lock, meaning that
+		all CD drives will be locked or unlocked together.  This is
+		probably a bug.
+
+		The EDRIVE_CANT_DO_THIS value is defined in <linux/cdrom.h>
+		and is currently (2.6.8.1) the same as EOPNOTSUPP
+
+
+
+CDROM_DEBUG
+	Turn debug messages on/off
+
+
+	usage::
+
+	  int debug;
+
+	  ioctl(fd, CDROM_DEBUG, debug);
+
+	inputs:
+		Cdrom debug flag, 0=disable, 1=enable
+
+
+	outputs:
+		The ioctl return value will be the new debug flag.
+
+
+	error return:
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+
+
+
+CDROM_GET_CAPABILITY
+	get capabilities
+
+
+	usage::
+
+	  ioctl(fd, CDROM_GET_CAPABILITY, 0);
+
+
+	inputs:
+		none
+
+
+	outputs:
+		The ioctl return value is the current device capability
+		flags.  See CDC_CLOSE_TRAY, CDC_OPEN_TRAY, etc.
+
+
+
+CDROMAUDIOBUFSIZ
+	set the audio buffer size
+
+
+	usage::
+
+	  int arg;
+
+	  ioctl(fd, CDROMAUDIOBUFSIZ, val);
+
+	inputs:
+		New audio buffer size
+
+
+	outputs:
+		The ioctl return value is the new audio buffer size, or -1
+		on error.
+
+	error return:
+	  - ENOSYS	Not supported by this driver.
+
+	notes:
+		Not supported by all drivers.
+
+
+
+
+DVD_READ_STRUCT			Read structure
+
+	usage::
+
+	  dvd_struct s;
+
+	  ioctl(fd, DVD_READ_STRUCT, &s);
+
+	inputs:
+		dvd_struct structure, containing:
+
+	    =================== ==========================================
+	    type		specifies the information desired, one of
+				DVD_STRUCT_PHYSICAL, DVD_STRUCT_COPYRIGHT,
+				DVD_STRUCT_DISCKEY, DVD_STRUCT_BCA,
+				DVD_STRUCT_MANUFACT
+	    physical.layer_num	desired layer, indexed from 0
+	    copyright.layer_num	desired layer, indexed from 0
+	    disckey.agid
+	    =================== ==========================================
+
+	outputs:
+		dvd_struct structure, containing:
+
+	    =================== ================================
+	    physical		for type == DVD_STRUCT_PHYSICAL
+	    copyright		for type == DVD_STRUCT_COPYRIGHT
+	    disckey.value	for type == DVD_STRUCT_DISCKEY
+	    bca.{len,value}	for type == DVD_STRUCT_BCA
+	    manufact.{len,valu}	for type == DVD_STRUCT_MANUFACT
+	    =================== ================================
+
+	error returns:
+	  - EINVAL	physical.layer_num exceeds number of layers
+	  - EIO		Received invalid response from drive
+
+
+
+DVD_WRITE_STRUCT		Write structure
+
+	Not implemented, as of 2.6.8.1
+
+
+
+DVD_AUTH			Authentication
+
+	usage::
+
+	  dvd_authinfo ai;
+
+	  ioctl(fd, DVD_AUTH, &ai);
+
+	inputs:
+		dvd_authinfo structure.  See <linux/cdrom.h>
+
+
+	outputs:
+		dvd_authinfo structure.
+
+
+	error return:
+	  - ENOTTY	ai.type not recognized.
+
+
+
+CDROM_SEND_PACKET
+	send a packet to the drive
+
+
+	usage::
+
+	  struct cdrom_generic_command cgc;
+
+	  ioctl(fd, CDROM_SEND_PACKET, &cgc);
+
+	inputs:
+		cdrom_generic_command structure containing the packet to send.
+
+
+	outputs:
+		none
+
+	  cdrom_generic_command structure containing results.
+
+	error return:
+	  - EIO
+
+			command failed.
+	  - EPERM
+
+			Operation not permitted, either because a
+			write command was attempted on a drive which
+			is opened read-only, or because the command
+			requires CAP_SYS_RAWIO
+	  - EINVAL
+
+			cgc.data_direction not set
+
+
+
+CDROM_NEXT_WRITABLE
+	get next writable block
+
+
+	usage::
+
+	  long next;
+
+	  ioctl(fd, CDROM_NEXT_WRITABLE, &next);
+
+	inputs:
+		none
+
+
+	outputs:
+		The next writable block.
+
+
+	notes:
+		If the device does not support this ioctl directly, the
+
+	  ioctl will return CDROM_LAST_WRITTEN + 7.
+
+
+
+CDROM_LAST_WRITTEN
+	get last block written on disc
+
+
+	usage::
+
+	  long last;
+
+	  ioctl(fd, CDROM_LAST_WRITTEN, &last);
+
+	inputs:
+		none
+
+
+	outputs:
+		The last block written on disc
+
+
+	notes:
+		If the device does not support this ioctl directly, the
+		result is derived from the disc's table of contents.  If the
+		table of contents can't be read, this ioctl returns an
+		error.
diff --git a/Documentation/userspace-api/ioctl/hdio.rst b/Documentation/userspace-api/ioctl/hdio.rst
new file mode 100644
index 000000000..817371bf9
--- /dev/null
+++ b/Documentation/userspace-api/ioctl/hdio.rst
@@ -0,0 +1,1342 @@
+==============================
+Summary of `HDIO_` ioctl calls
+==============================
+
+- Edward A. Falk <efalk@google.com>
+
+November, 2004
+
+This document attempts to describe the ioctl(2) calls supported by
+the HD/IDE layer.  These are by-and-large implemented (as of Linux 2.6)
+in drivers/ide/ide.c and drivers/block/scsi_ioctl.c
+
+ioctl values are listed in <linux/hdreg.h>.  As of this writing, they
+are as follows:
+
+    ioctls that pass argument pointers to user space:
+
+	=======================	=======================================
+	HDIO_GETGEO		get device geometry
+	HDIO_GET_UNMASKINTR	get current unmask setting
+	HDIO_GET_MULTCOUNT	get current IDE blockmode setting
+	HDIO_GET_QDMA		get use-qdma flag
+	HDIO_SET_XFER		set transfer rate via proc
+	HDIO_OBSOLETE_IDENTITY	OBSOLETE, DO NOT USE
+	HDIO_GET_KEEPSETTINGS	get keep-settings-on-reset flag
+	HDIO_GET_32BIT		get current io_32bit setting
+	HDIO_GET_NOWERR		get ignore-write-error flag
+	HDIO_GET_DMA		get use-dma flag
+	HDIO_GET_NICE		get nice flags
+	HDIO_GET_IDENTITY	get IDE identification info
+	HDIO_GET_WCACHE		get write cache mode on|off
+	HDIO_GET_ACOUSTIC	get acoustic value
+	HDIO_GET_ADDRESS	get sector addressing mode
+	HDIO_GET_BUSSTATE	get the bus state of the hwif
+	HDIO_TRISTATE_HWIF	execute a channel tristate
+	HDIO_DRIVE_RESET	execute a device reset
+	HDIO_DRIVE_TASKFILE	execute raw taskfile
+	HDIO_DRIVE_TASK		execute task and special drive command
+	HDIO_DRIVE_CMD		execute a special drive command
+	HDIO_DRIVE_CMD_AEB	HDIO_DRIVE_TASK
+	=======================	=======================================
+
+    ioctls that pass non-pointer values:
+
+	=======================	=======================================
+	HDIO_SET_MULTCOUNT	change IDE blockmode
+	HDIO_SET_UNMASKINTR	permit other irqs during I/O
+	HDIO_SET_KEEPSETTINGS	keep ioctl settings on reset
+	HDIO_SET_32BIT		change io_32bit flags
+	HDIO_SET_NOWERR		change ignore-write-error flag
+	HDIO_SET_DMA		change use-dma flag
+	HDIO_SET_PIO_MODE	reconfig interface to new speed
+	HDIO_SCAN_HWIF		register and (re)scan interface
+	HDIO_SET_NICE		set nice flags
+	HDIO_UNREGISTER_HWIF	unregister interface
+	HDIO_SET_WCACHE		change write cache enable-disable
+	HDIO_SET_ACOUSTIC	change acoustic behavior
+	HDIO_SET_BUSSTATE	set the bus state of the hwif
+	HDIO_SET_QDMA		change use-qdma flag
+	HDIO_SET_ADDRESS	change lba addressing modes
+
+	HDIO_SET_IDE_SCSI	Set scsi emulation mode on/off
+	HDIO_SET_SCSI_IDE	not implemented yet
+	=======================	=======================================
+
+
+The information that follows was determined from reading kernel source
+code.  It is likely that some corrections will be made over time.
+
+------------------------------------------------------------------------------
+
+General:
+
+	Unless otherwise specified, all ioctl calls return 0 on success
+	and -1 with errno set to an appropriate value on error.
+
+	Unless otherwise specified, all ioctl calls return -1 and set
+	errno to EFAULT on a failed attempt to copy data to or from user
+	address space.
+
+	Unless otherwise specified, all data structures and constants
+	are defined in <linux/hdreg.h>
+
+------------------------------------------------------------------------------
+
+HDIO_GETGEO
+	get device geometry
+
+
+	usage::
+
+	  struct hd_geometry geom;
+
+	  ioctl(fd, HDIO_GETGEO, &geom);
+
+
+	inputs:
+		none
+
+
+
+	outputs:
+		hd_geometry structure containing:
+
+
+	    =========	==================================
+	    heads	number of heads
+	    sectors	number of sectors/track
+	    cylinders	number of cylinders, mod 65536
+	    start	starting sector of this partition.
+	    =========	==================================
+
+
+	error returns:
+	  - EINVAL
+
+			if the device is not a disk drive or floppy drive,
+			or if the user passes a null pointer
+
+
+	notes:
+		Not particularly useful with modern disk drives, whose geometry
+		is a polite fiction anyway.  Modern drives are addressed
+		purely by sector number nowadays (lba addressing), and the
+		drive geometry is an abstraction which is actually subject
+		to change.  Currently (as of Nov 2004), the geometry values
+		are the "bios" values -- presumably the values the drive had
+		when Linux first booted.
+
+		In addition, the cylinders field of the hd_geometry is an
+		unsigned short, meaning that on most architectures, this
+		ioctl will not return a meaningful value on drives with more
+		than 65535 tracks.
+
+		The start field is unsigned long, meaning that it will not
+		contain a meaningful value for disks over 219 Gb in size.
+
+
+
+
+HDIO_GET_UNMASKINTR
+	get current unmask setting
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_UNMASKINTR, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the drive's current unmask setting
+
+
+
+
+
+HDIO_SET_UNMASKINTR
+	permit other irqs during I/O
+
+
+	usage::
+
+	  unsigned long val;
+
+	  ioctl(fd, HDIO_SET_UNMASKINTR, val);
+
+	inputs:
+		New value for unmask flag
+
+
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 1]
+	  - EBUSY	Controller busy
+
+
+
+
+HDIO_GET_MULTCOUNT
+	get current IDE blockmode setting
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_MULTCOUNT, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the current IDE block mode setting.  This
+		controls how many sectors the drive will transfer per
+		interrupt.
+
+
+
+HDIO_SET_MULTCOUNT
+	change IDE blockmode
+
+
+	usage::
+
+	  int val;
+
+	  ioctl(fd, HDIO_SET_MULTCOUNT, val);
+
+	inputs:
+		New value for IDE block mode setting.  This controls how many
+		sectors the drive will transfer per interrupt.
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range supported by disk.
+	  - EBUSY	Controller busy or blockmode already set.
+	  - EIO		Drive did not accept new block mode.
+
+	notes:
+	  Source code comments read::
+
+	    This is tightly woven into the driver->do_special cannot
+	    touch.  DON'T do it again until a total personality rewrite
+	    is committed.
+
+	  If blockmode has already been set, this ioctl will fail with
+	  -EBUSY
+
+
+
+HDIO_GET_QDMA
+	get use-qdma flag
+
+
+	Not implemented, as of 2.6.8.1
+
+
+
+HDIO_SET_XFER
+	set transfer rate via proc
+
+
+	Not implemented, as of 2.6.8.1
+
+
+
+HDIO_OBSOLETE_IDENTITY
+	OBSOLETE, DO NOT USE
+
+
+	Same as HDIO_GET_IDENTITY (see below), except that it only
+	returns the first 142 bytes of drive identity information.
+
+
+
+HDIO_GET_IDENTITY
+	get IDE identification info
+
+
+	usage::
+
+	  unsigned char identity[512];
+
+	  ioctl(fd, HDIO_GET_IDENTITY, identity);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		ATA drive identity information.  For full description, see
+		the IDENTIFY DEVICE and IDENTIFY PACKET DEVICE commands in
+		the ATA specification.
+
+	error returns:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - ENOMSG	IDENTIFY DEVICE information not available
+
+	notes:
+		Returns information that was obtained when the drive was
+		probed.  Some of this information is subject to change, and
+		this ioctl does not re-probe the drive to update the
+		information.
+
+		This information is also available from /proc/ide/hdX/identify
+
+
+
+HDIO_GET_KEEPSETTINGS
+	get keep-settings-on-reset flag
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_KEEPSETTINGS, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the current "keep settings" flag
+
+
+
+	notes:
+		When set, indicates that kernel should restore settings
+		after a drive reset.
+
+
+
+HDIO_SET_KEEPSETTINGS
+	keep ioctl settings on reset
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_SET_KEEPSETTINGS, val);
+
+	inputs:
+		New value for keep_settings flag
+
+
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 1]
+	  - EBUSY		Controller busy
+
+
+
+HDIO_GET_32BIT
+	get current io_32bit setting
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_32BIT, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the current io_32bit setting
+
+
+
+	notes:
+		0=16-bit, 1=32-bit, 2,3 = 32bit+sync
+
+
+
+
+
+HDIO_GET_NOWERR
+	get ignore-write-error flag
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_NOWERR, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the current ignore-write-error flag
+
+
+
+
+
+HDIO_GET_DMA
+	get use-dma flag
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_DMA, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the current use-dma flag
+
+
+
+
+
+HDIO_GET_NICE
+	get nice flags
+
+
+	usage::
+
+	  long nice;
+
+	  ioctl(fd, HDIO_GET_NICE, &nice);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The drive's "nice" values.
+
+
+
+	notes:
+		Per-drive flags which determine when the system will give more
+		bandwidth to other devices sharing the same IDE bus.
+
+		See <linux/hdreg.h>, near symbol IDE_NICE_DSC_OVERLAP.
+
+
+
+
+HDIO_SET_NICE
+	set nice flags
+
+
+	usage::
+
+	  unsigned long nice;
+
+	  ...
+	  ioctl(fd, HDIO_SET_NICE, nice);
+
+	inputs:
+		bitmask of nice flags.
+
+
+
+	outputs:
+		none
+
+
+
+	error returns:
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EPERM	Flags other than DSC_OVERLAP and NICE_1 set.
+	  - EPERM	DSC_OVERLAP specified but not supported by drive
+
+	notes:
+		This ioctl sets the DSC_OVERLAP and NICE_1 flags from values
+		provided by the user.
+
+		Nice flags are listed in <linux/hdreg.h>, starting with
+		IDE_NICE_DSC_OVERLAP.  These values represent shifts.
+
+
+
+
+
+HDIO_GET_WCACHE
+	get write cache mode on|off
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_WCACHE, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the current write cache mode
+
+
+
+
+
+HDIO_GET_ACOUSTIC
+	get acoustic value
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_ACOUSTIC, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the current acoustic settings
+
+
+
+	notes:
+		See HDIO_SET_ACOUSTIC
+
+
+
+
+
+HDIO_GET_ADDRESS
+	usage::
+
+
+	  long val;
+
+	  ioctl(fd, HDIO_GET_ADDRESS, &val);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		The value of the current addressing mode:
+
+	    =  ===================
+	    0  28-bit
+	    1  48-bit
+	    2  48-bit doing 28-bit
+	    3  64-bit
+	    =  ===================
+
+
+
+HDIO_GET_BUSSTATE
+	get the bus state of the hwif
+
+
+	usage::
+
+	  long state;
+
+	  ioctl(fd, HDIO_SCAN_HWIF, &state);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		Current power state of the IDE bus.  One of BUSSTATE_OFF,
+		BUSSTATE_ON, or BUSSTATE_TRISTATE
+
+	error returns:
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+
+
+
+
+HDIO_SET_BUSSTATE
+	set the bus state of the hwif
+
+
+	usage::
+
+	  int state;
+
+	  ...
+	  ioctl(fd, HDIO_SCAN_HWIF, state);
+
+	inputs:
+		Desired IDE power state.  One of BUSSTATE_OFF, BUSSTATE_ON,
+		or BUSSTATE_TRISTATE
+
+	outputs:
+		none
+
+
+
+	error returns:
+	  - EACCES	Access denied:  requires CAP_SYS_RAWIO
+	  - EOPNOTSUPP	Hardware interface does not support bus power control
+
+
+
+
+HDIO_TRISTATE_HWIF
+	execute a channel tristate
+
+
+	Not implemented, as of 2.6.8.1.  See HDIO_SET_BUSSTATE
+
+
+
+HDIO_DRIVE_RESET
+	execute a device reset
+
+
+	usage::
+
+	  int args[3]
+
+	  ...
+	  ioctl(fd, HDIO_DRIVE_RESET, args);
+
+	inputs:
+		none
+
+
+
+	outputs:
+		none
+
+
+
+	error returns:
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - ENXIO	No such device:	phy dead or ctl_addr == 0
+	  - EIO		I/O error:	reset timed out or hardware error
+
+	notes:
+
+	  - Execute a reset on the device as soon as the current IO
+	    operation has completed.
+
+	  - Executes an ATAPI soft reset if applicable, otherwise
+	    executes an ATA soft reset on the controller.
+
+
+
+HDIO_DRIVE_TASKFILE
+	execute raw taskfile
+
+
+	Note:
+		If you don't have a copy of the ANSI ATA specification
+		handy, you should probably ignore this ioctl.
+
+	- Execute an ATA disk command directly by writing the "taskfile"
+	  registers of the drive.  Requires ADMIN and RAWIO access
+	  privileges.
+
+	usage::
+
+	  struct {
+
+	    ide_task_request_t req_task;
+	    u8 outbuf[OUTPUT_SIZE];
+	    u8 inbuf[INPUT_SIZE];
+	  } task;
+	  memset(&task.req_task, 0, sizeof(task.req_task));
+	  task.req_task.out_size = sizeof(task.outbuf);
+	  task.req_task.in_size = sizeof(task.inbuf);
+	  ...
+	  ioctl(fd, HDIO_DRIVE_TASKFILE, &task);
+	  ...
+
+	inputs:
+
+	  (See below for details on memory area passed to ioctl.)
+
+	  ============	===================================================
+	  io_ports[8]	values to be written to taskfile registers
+	  hob_ports[8]	high-order bytes, for extended commands.
+	  out_flags	flags indicating which registers are valid
+	  in_flags	flags indicating which registers should be returned
+	  data_phase	see below
+	  req_cmd	command type to be executed
+	  out_size	size of output buffer
+	  outbuf	buffer of data to be transmitted to disk
+	  inbuf		buffer of data to be received from disk (see [1])
+	  ============	===================================================
+
+	outputs:
+
+	  ===========	====================================================
+	  io_ports[]	values returned in the taskfile registers
+	  hob_ports[]	high-order bytes, for extended commands.
+	  out_flags	flags indicating which registers are valid (see [2])
+	  in_flags	flags indicating which registers should be returned
+	  outbuf	buffer of data to be transmitted to disk (see [1])
+	  inbuf		buffer of data to be received from disk
+	  ===========	====================================================
+
+	error returns:
+	  - EACCES	CAP_SYS_ADMIN or CAP_SYS_RAWIO privilege not set.
+	  - ENOMSG	Device is not a disk drive.
+	  - ENOMEM	Unable to allocate memory for task
+	  - EFAULT	req_cmd == TASKFILE_IN_OUT (not implemented as of 2.6.8)
+	  - EPERM
+
+			req_cmd == TASKFILE_MULTI_OUT and drive
+			multi-count not yet set.
+	  - EIO		Drive failed the command.
+
+	notes:
+
+	  [1] READ THE FOLLOWING NOTES *CAREFULLY*.  THIS IOCTL IS
+	  FULL OF GOTCHAS.  Extreme caution should be used with using
+	  this ioctl.  A mistake can easily corrupt data or hang the
+	  system.
+
+	  [2] Both the input and output buffers are copied from the
+	  user and written back to the user, even when not used.
+
+	  [3] If one or more bits are set in out_flags and in_flags is
+	  zero, the following values are used for in_flags.all and
+	  written back into in_flags on completion.
+
+	   * IDE_TASKFILE_STD_IN_FLAGS | (IDE_HOB_STD_IN_FLAGS << 8)
+	     if LBA48 addressing is enabled for the drive
+	   * IDE_TASKFILE_STD_IN_FLAGS
+	     if CHS/LBA28
+
+	  The association between in_flags.all and each enable
+	  bitfield flips depending on endianness; fortunately, TASKFILE
+	  only uses inflags.b.data bit and ignores all other bits.
+	  The end result is that, on any endian machines, it has no
+	  effect other than modifying in_flags on completion.
+
+	  [4] The default value of SELECT is (0xa0|DEV_bit|LBA_bit)
+	  except for four drives per port chipsets.  For four drives
+	  per port chipsets, it's (0xa0|DEV_bit|LBA_bit) for the first
+	  pair and (0x80|DEV_bit|LBA_bit) for the second pair.
+
+	  [5] The argument to the ioctl is a pointer to a region of
+	  memory containing a ide_task_request_t structure, followed
+	  by an optional buffer of data to be transmitted to the
+	  drive, followed by an optional buffer to receive data from
+	  the drive.
+
+	  Command is passed to the disk drive via the ide_task_request_t
+	  structure, which contains these fields:
+
+	    ============	===============================================
+	    io_ports[8]		values for the taskfile registers
+	    hob_ports[8]	high-order bytes, for extended commands
+	    out_flags		flags indicating which entries in the
+				io_ports[] and hob_ports[] arrays
+				contain valid values.  Type ide_reg_valid_t.
+	    in_flags		flags indicating which entries in the
+				io_ports[] and hob_ports[] arrays
+				are expected to contain valid values
+				on return.
+	    data_phase		See below
+	    req_cmd		Command type, see below
+	    out_size		output (user->drive) buffer size, bytes
+	    in_size		input (drive->user) buffer size, bytes
+	    ============	===============================================
+
+	  When out_flags is zero, the following registers are loaded.
+
+	    ============	===============================================
+	    HOB_FEATURE		If the drive supports LBA48
+	    HOB_NSECTOR		If the drive supports LBA48
+	    HOB_SECTOR		If the drive supports LBA48
+	    HOB_LCYL		If the drive supports LBA48
+	    HOB_HCYL		If the drive supports LBA48
+	    FEATURE
+	    NSECTOR
+	    SECTOR
+	    LCYL
+	    HCYL
+	    SELECT		First, masked with 0xE0 if LBA48, 0xEF
+				otherwise; then, or'ed with the default
+				value of SELECT.
+	    ============	===============================================
+
+	  If any bit in out_flags is set, the following registers are loaded.
+
+	    ============	===============================================
+	    HOB_DATA		If out_flags.b.data is set.  HOB_DATA will
+				travel on DD8-DD15 on little endian machines
+				and on DD0-DD7 on big endian machines.
+	    DATA		If out_flags.b.data is set.  DATA will
+				travel on DD0-DD7 on little endian machines
+				and on DD8-DD15 on big endian machines.
+	    HOB_NSECTOR		If out_flags.b.nsector_hob is set
+	    HOB_SECTOR		If out_flags.b.sector_hob is set
+	    HOB_LCYL		If out_flags.b.lcyl_hob is set
+	    HOB_HCYL		If out_flags.b.hcyl_hob is set
+	    FEATURE		If out_flags.b.feature is set
+	    NSECTOR		If out_flags.b.nsector is set
+	    SECTOR		If out_flags.b.sector is set
+	    LCYL		If out_flags.b.lcyl is set
+	    HCYL		If out_flags.b.hcyl is set
+	    SELECT		Or'ed with the default value of SELECT and
+				loaded regardless of out_flags.b.select.
+	    ============	===============================================
+
+	  Taskfile registers are read back from the drive into
+	  {io|hob}_ports[] after the command completes iff one of the
+	  following conditions is met; otherwise, the original values
+	  will be written back, unchanged.
+
+	    1. The drive fails the command (EIO).
+	    2. One or more than one bits are set in out_flags.
+	    3. The requested data_phase is TASKFILE_NO_DATA.
+
+	    ============	===============================================
+	    HOB_DATA		If in_flags.b.data is set.  It will contain
+				DD8-DD15 on little endian machines and
+				DD0-DD7 on big endian machines.
+	    DATA		If in_flags.b.data is set.  It will contain
+				DD0-DD7 on little endian machines and
+				DD8-DD15 on big endian machines.
+	    HOB_FEATURE		If the drive supports LBA48
+	    HOB_NSECTOR		If the drive supports LBA48
+	    HOB_SECTOR		If the drive supports LBA48
+	    HOB_LCYL		If the drive supports LBA48
+	    HOB_HCYL		If the drive supports LBA48
+	    NSECTOR
+	    SECTOR
+	    LCYL
+	    HCYL
+	    ============	===============================================
+
+	  The data_phase field describes the data transfer to be
+	  performed.  Value is one of:
+
+	    ===================        ========================================
+	    TASKFILE_IN
+	    TASKFILE_MULTI_IN
+	    TASKFILE_OUT
+	    TASKFILE_MULTI_OUT
+	    TASKFILE_IN_OUT
+	    TASKFILE_IN_DMA
+	    TASKFILE_IN_DMAQ		== IN_DMA (queueing not supported)
+	    TASKFILE_OUT_DMA
+	    TASKFILE_OUT_DMAQ		== OUT_DMA (queueing not supported)
+	    TASKFILE_P_IN		unimplemented
+	    TASKFILE_P_IN_DMA		unimplemented
+	    TASKFILE_P_IN_DMAQ		unimplemented
+	    TASKFILE_P_OUT		unimplemented
+	    TASKFILE_P_OUT_DMA		unimplemented
+	    TASKFILE_P_OUT_DMAQ		unimplemented
+	    ===================        ========================================
+
+	  The req_cmd field classifies the command type.  It may be
+	  one of:
+
+	    ========================    =======================================
+	    IDE_DRIVE_TASK_NO_DATA
+	    IDE_DRIVE_TASK_SET_XFER	unimplemented
+	    IDE_DRIVE_TASK_IN
+	    IDE_DRIVE_TASK_OUT		unimplemented
+	    IDE_DRIVE_TASK_RAW_WRITE
+	    ========================    =======================================
+
+	  [6] Do not access {in|out}_flags->all except for resetting
+	  all the bits.  Always access individual bit fields.  ->all
+	  value will flip depending on endianness.  For the same
+	  reason, do not use IDE_{TASKFILE|HOB}_STD_{OUT|IN}_FLAGS
+	  constants defined in hdreg.h.
+
+
+
+HDIO_DRIVE_CMD
+	execute a special drive command
+
+
+	Note:  If you don't have a copy of the ANSI ATA specification
+	handy, you should probably ignore this ioctl.
+
+	usage::
+
+	  u8 args[4+XFER_SIZE];
+
+	  ...
+	  ioctl(fd, HDIO_DRIVE_CMD, args);
+
+	inputs:
+	    Commands other than WIN_SMART:
+
+	    =======     =======
+	    args[0]	COMMAND
+	    args[1]	NSECTOR
+	    args[2]	FEATURE
+	    args[3]	NSECTOR
+	    =======     =======
+
+	    WIN_SMART:
+
+	    =======     =======
+	    args[0]	COMMAND
+	    args[1]	SECTOR
+	    args[2]	FEATURE
+	    args[3]	NSECTOR
+	    =======     =======
+
+	outputs:
+		args[] buffer is filled with register values followed by any
+
+
+	  data returned by the disk.
+
+	    ========	====================================================
+	    args[0]	status
+	    args[1]	error
+	    args[2]	NSECTOR
+	    args[3]	undefined
+	    args[4+]	NSECTOR * 512 bytes of data returned by the command.
+	    ========	====================================================
+
+	error returns:
+	  - EACCES	Access denied:  requires CAP_SYS_RAWIO
+	  - ENOMEM	Unable to allocate memory for task
+	  - EIO		Drive reports error
+
+	notes:
+
+	  [1] For commands other than WIN_SMART, args[1] should equal
+	  args[3].  SECTOR, LCYL and HCYL are undefined.  For
+	  WIN_SMART, 0x4f and 0xc2 are loaded into LCYL and HCYL
+	  respectively.  In both cases SELECT will contain the default
+	  value for the drive.  Please refer to HDIO_DRIVE_TASKFILE
+	  notes for the default value of SELECT.
+
+	  [2] If NSECTOR value is greater than zero and the drive sets
+	  DRQ when interrupting for the command, NSECTOR * 512 bytes
+	  are read from the device into the area following NSECTOR.
+	  In the above example, the area would be
+	  args[4..4+XFER_SIZE].  16bit PIO is used regardless of
+	  HDIO_SET_32BIT setting.
+
+	  [3] If COMMAND == WIN_SETFEATURES && FEATURE == SETFEATURES_XFER
+	  && NSECTOR >= XFER_SW_DMA_0 && the drive supports any DMA
+	  mode, IDE driver will try to tune the transfer mode of the
+	  drive accordingly.
+
+
+
+HDIO_DRIVE_TASK
+	execute task and special drive command
+
+
+	Note:  If you don't have a copy of the ANSI ATA specification
+	handy, you should probably ignore this ioctl.
+
+	usage::
+
+	  u8 args[7];
+
+	  ...
+	  ioctl(fd, HDIO_DRIVE_TASK, args);
+
+	inputs:
+	    Taskfile register values:
+
+	    =======	=======
+	    args[0]	COMMAND
+	    args[1]	FEATURE
+	    args[2]	NSECTOR
+	    args[3]	SECTOR
+	    args[4]	LCYL
+	    args[5]	HCYL
+	    args[6]	SELECT
+	    =======	=======
+
+	outputs:
+	    Taskfile register values:
+
+
+	    =======	=======
+	    args[0]	status
+	    args[1]	error
+	    args[2]	NSECTOR
+	    args[3]	SECTOR
+	    args[4]	LCYL
+	    args[5]	HCYL
+	    args[6]	SELECT
+	    =======	=======
+
+	error returns:
+	  - EACCES	Access denied:  requires CAP_SYS_RAWIO
+	  - ENOMEM	Unable to allocate memory for task
+	  - ENOMSG	Device is not a disk drive.
+	  - EIO		Drive failed the command.
+
+	notes:
+
+	  [1] DEV bit (0x10) of SELECT register is ignored and the
+	  appropriate value for the drive is used.  All other bits
+	  are used unaltered.
+
+
+
+HDIO_DRIVE_CMD_AEB
+	HDIO_DRIVE_TASK
+
+
+	Not implemented, as of 2.6.8.1
+
+
+
+HDIO_SET_32BIT
+	change io_32bit flags
+
+
+	usage::
+
+	  int val;
+
+	  ioctl(fd, HDIO_SET_32BIT, val);
+
+	inputs:
+		New value for io_32bit flag
+
+
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 3]
+	  - EBUSY	Controller busy
+
+
+
+
+HDIO_SET_NOWERR
+	change ignore-write-error flag
+
+
+	usage::
+
+	  int val;
+
+	  ioctl(fd, HDIO_SET_NOWERR, val);
+
+	inputs:
+		New value for ignore-write-error flag.  Used for ignoring
+
+
+	  WRERR_STAT
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 1]
+	  - EBUSY		Controller busy
+
+
+
+HDIO_SET_DMA
+	change use-dma flag
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_SET_DMA, val);
+
+	inputs:
+		New value for use-dma flag
+
+
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 1]
+	  - EBUSY	Controller busy
+
+
+
+HDIO_SET_PIO_MODE
+	reconfig interface to new speed
+
+
+	usage::
+
+	  long val;
+
+	  ioctl(fd, HDIO_SET_PIO_MODE, val);
+
+	inputs:
+		New interface speed.
+
+
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 255]
+	  - EBUSY	Controller busy
+
+
+
+HDIO_SCAN_HWIF
+	register and (re)scan interface
+
+
+	usage::
+
+	  int args[3]
+
+	  ...
+	  ioctl(fd, HDIO_SCAN_HWIF, args);
+
+	inputs:
+
+	  =======	=========================
+	  args[0]	io address to probe
+
+
+	  args[1]	control address to probe
+	  args[2]	irq number
+	  =======	=========================
+
+	outputs:
+		none
+
+
+
+	error returns:
+	  - EACCES	Access denied:  requires CAP_SYS_RAWIO
+	  - EIO		Probe failed.
+
+	notes:
+		This ioctl initializes the addresses and irq for a disk
+		controller, probes for drives, and creates /proc/ide
+		interfaces as appropriate.
+
+
+
+HDIO_UNREGISTER_HWIF
+	unregister interface
+
+
+	usage::
+
+	  int index;
+
+	  ioctl(fd, HDIO_UNREGISTER_HWIF, index);
+
+	inputs:
+		index		index of hardware interface to unregister
+
+
+
+	outputs:
+		none
+
+
+
+	error returns:
+	  - EACCES	Access denied:  requires CAP_SYS_RAWIO
+
+	notes:
+		This ioctl removes a hardware interface from the kernel.
+
+		Currently (2.6.8) this ioctl silently fails if any drive on
+		the interface is busy.
+
+
+
+HDIO_SET_WCACHE
+	change write cache enable-disable
+
+
+	usage::
+
+	  int val;
+
+	  ioctl(fd, HDIO_SET_WCACHE, val);
+
+	inputs:
+		New value for write cache enable
+
+
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 1]
+	  - EBUSY	Controller busy
+
+
+
+HDIO_SET_ACOUSTIC
+	change acoustic behavior
+
+
+	usage::
+
+	  int val;
+
+	  ioctl(fd, HDIO_SET_ACOUSTIC, val);
+
+	inputs:
+		New value for drive acoustic settings
+
+
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 254]
+	  - EBUSY	Controller busy
+
+
+
+HDIO_SET_QDMA
+	change use-qdma flag
+
+
+	Not implemented, as of 2.6.8.1
+
+
+
+HDIO_SET_ADDRESS
+	change lba addressing modes
+
+
+	usage::
+
+	  int val;
+
+	  ioctl(fd, HDIO_SET_ADDRESS, val);
+
+	inputs:
+		New value for addressing mode
+
+	    =   ===================
+	    0   28-bit
+	    1   48-bit
+	    2   48-bit doing 28-bit
+	    =   ===================
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 2]
+	  - EBUSY		Controller busy
+	  - EIO		Drive does not support lba48 mode.
+
+
+HDIO_SET_IDE_SCSI
+	usage::
+
+
+	  long val;
+
+	  ioctl(fd, HDIO_SET_IDE_SCSI, val);
+
+	inputs:
+		New value for scsi emulation mode (?)
+
+
+
+	outputs:
+		none
+
+
+
+	error return:
+	  - EINVAL	Called on a partition instead of the whole disk device
+	  - EACCES	Access denied:  requires CAP_SYS_ADMIN
+	  - EINVAL	value out of range [0 1]
+	  - EBUSY	Controller busy
+
+
+
+HDIO_SET_SCSI_IDE
+	Not implemented, as of 2.6.8.1
diff --git a/Documentation/userspace-api/ioctl/index.rst b/Documentation/userspace-api/ioctl/index.rst
new file mode 100644
index 000000000..475675eae
--- /dev/null
+++ b/Documentation/userspace-api/ioctl/index.rst
@@ -0,0 +1,15 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+======
+IOCTLs
+======
+
+.. toctree::
+   :maxdepth: 1
+
+   ioctl-number
+
+   ioctl-decoding
+
+   cdrom
+   hdio
diff --git a/Documentation/userspace-api/ioctl/ioctl-decoding.rst b/Documentation/userspace-api/ioctl/ioctl-decoding.rst
new file mode 100644
index 000000000..380d6bb3e
--- /dev/null
+++ b/Documentation/userspace-api/ioctl/ioctl-decoding.rst
@@ -0,0 +1,31 @@
+==============================
+Decoding an IOCTL Magic Number
+==============================
+
+To decode a hex IOCTL code:
+
+Most architectures use this generic format, but check
+include/ARCH/ioctl.h for specifics, e.g. powerpc
+uses 3 bits to encode read/write and 13 bits for size.
+
+ ====== ==================================
+ bits   meaning
+ ====== ==================================
+ 31-30	00 - no parameters: uses _IO macro
+	10 - read: _IOR
+	01 - write: _IOW
+	11 - read/write: _IOWR
+
+ 29-16	size of arguments
+
+ 15-8	ascii character supposedly
+	unique to each driver
+
+ 7-0	function #
+ ====== ==================================
+
+
+So for example 0x82187201 is a read with arg length of 0x218,
+character 'r' function 1. Grepping the source reveals this is::
+
+	#define VFAT_IOCTL_READDIR_BOTH         _IOR('r', 1, struct dirent [2])
diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst
new file mode 100644
index 000000000..a7373d4e3
--- /dev/null
+++ b/Documentation/userspace-api/ioctl/ioctl-number.rst
@@ -0,0 +1,365 @@
+=============
+Ioctl Numbers
+=============
+
+19 October 1999
+
+Michael Elizabeth Chastain
+<mec@shout.net>
+
+If you are adding new ioctl's to the kernel, you should use the _IO
+macros defined in <linux/ioctl.h>:
+
+    ====== == ============================================
+    _IO    an ioctl with no parameters
+    _IOW   an ioctl with write parameters (copy_from_user)
+    _IOR   an ioctl with read parameters  (copy_to_user)
+    _IOWR  an ioctl with both write and read parameters.
+    ====== == ============================================
+
+'Write' and 'read' are from the user's point of view, just like the
+system calls 'write' and 'read'.  For example, a SET_FOO ioctl would
+be _IOW, although the kernel would actually read data from user space;
+a GET_FOO ioctl would be _IOR, although the kernel would actually write
+data to user space.
+
+The first argument to _IO, _IOW, _IOR, or _IOWR is an identifying letter
+or number from the table below.  Because of the large number of drivers,
+many drivers share a partial letter with other drivers.
+
+If you are writing a driver for a new device and need a letter, pick an
+unused block with enough room for expansion: 32 to 256 ioctl commands.
+You can register the block by patching this file and submitting the
+patch to Linus Torvalds.  Or you can e-mail me at <mec@shout.net> and
+I'll register one for you.
+
+The second argument to _IO, _IOW, _IOR, or _IOWR is a sequence number
+to distinguish ioctls from each other.  The third argument to _IOW,
+_IOR, or _IOWR is the type of the data going into the kernel or coming
+out of the kernel (e.g.  'int' or 'struct foo').  NOTE!  Do NOT use
+sizeof(arg) as the third argument as this results in your ioctl thinking
+it passes an argument of type size_t.
+
+Some devices use their major number as the identifier; this is OK, as
+long as it is unique.  Some devices are irregular and don't follow any
+convention at all.
+
+Following this convention is good because:
+
+(1) Keeping the ioctl's globally unique helps error checking:
+    if a program calls an ioctl on the wrong device, it will get an
+    error rather than some unexpected behaviour.
+
+(2) The 'strace' build procedure automatically finds ioctl numbers
+    defined with _IO, _IOW, _IOR, or _IOWR.
+
+(3) 'strace' can decode numbers back into useful names when the
+    numbers are unique.
+
+(4) People looking for ioctls can grep for them more easily when
+    this convention is used to define the ioctl numbers.
+
+(5) When following the convention, the driver code can use generic
+    code to copy the parameters between user and kernel space.
+
+This table lists ioctls visible from user land for Linux/x86.  It contains
+most drivers up to 2.6.31, but I know I am missing some.  There has been
+no attempt to list non-X86 architectures or ioctls from drivers/staging/.
+
+====  =====  ======================================================= ================================================================
+Code  Seq#    Include File                                           Comments
+      (hex)
+====  =====  ======================================================= ================================================================
+0x00  00-1F  linux/fs.h                                              conflict!
+0x00  00-1F  scsi/scsi_ioctl.h                                       conflict!
+0x00  00-1F  linux/fb.h                                              conflict!
+0x00  00-1F  linux/wavefront.h                                       conflict!
+0x02  all    linux/fd.h
+0x03  all    linux/hdreg.h
+0x04  D2-DC  linux/umsdos_fs.h                                       Dead since 2.6.11, but don't reuse these.
+0x06  all    linux/lp.h
+0x09  all    linux/raid/md_u.h
+0x10  00-0F  drivers/char/s390/vmcp.h
+0x10  10-1F  arch/s390/include/uapi/sclp_ctl.h
+0x10  20-2F  arch/s390/include/uapi/asm/hypfs.h
+0x12  all    linux/fs.h
+             linux/blkpg.h
+0x1b  all                                                            InfiniBand Subsystem
+                                                                     <http://infiniband.sourceforge.net/>
+0x20  all    drivers/cdrom/cm206.h
+0x22  all    scsi/sg.h
+'!'   00-1F  uapi/linux/seccomp.h
+'#'   00-3F                                                          IEEE 1394 Subsystem
+                                                                     Block for the entire subsystem
+'$'   00-0F  linux/perf_counter.h, linux/perf_event.h
+'%'   00-0F  include/uapi/linux/stm.h                                System Trace Module subsystem
+                                                                     <mailto:alexander.shishkin@linux.intel.com>
+'&'   00-07  drivers/firewire/nosy-user.h
+'1'   00-1F  linux/timepps.h                                         PPS kit from Ulrich Windl
+                                                                     <ftp://ftp.de.kernel.org/pub/linux/daemons/ntp/PPS/>
+'2'   01-04  linux/i2o.h
+'3'   00-0F  drivers/s390/char/raw3270.h                             conflict!
+'3'   00-1F  linux/suspend_ioctls.h,                                 conflict!
+             kernel/power/user.c
+'8'   all                                                            SNP8023 advanced NIC card
+                                                                     <mailto:mcr@solidum.com>
+';'   64-7F  linux/vfio.h
+'@'   00-0F  linux/radeonfb.h                                        conflict!
+'@'   00-0F  drivers/video/aty/aty128fb.c                            conflict!
+'A'   00-1F  linux/apm_bios.h                                        conflict!
+'A'   00-0F  linux/agpgart.h,                                        conflict!
+             drivers/char/agp/compat_ioctl.h
+'A'   00-7F  sound/asound.h                                          conflict!
+'B'   00-1F  linux/cciss_ioctl.h                                     conflict!
+'B'   00-0F  include/linux/pmu.h                                     conflict!
+'B'   C0-FF  advanced bbus                                           <mailto:maassen@uni-freiburg.de>
+'C'   all    linux/soundcard.h                                       conflict!
+'C'   01-2F  linux/capi.h                                            conflict!
+'C'   F0-FF  drivers/net/wan/cosa.h                                  conflict!
+'D'   all    arch/s390/include/asm/dasd.h
+'D'   40-5F  drivers/scsi/dpt/dtpi_ioctl.h
+'D'   05     drivers/scsi/pmcraid.h
+'E'   all    linux/input.h                                           conflict!
+'E'   00-0F  xen/evtchn.h                                            conflict!
+'F'   all    linux/fb.h                                              conflict!
+'F'   01-02  drivers/scsi/pmcraid.h                                  conflict!
+'F'   20     drivers/video/fsl-diu-fb.h                              conflict!
+'F'   20     drivers/video/intelfb/intelfb.h                         conflict!
+'F'   20     linux/ivtvfb.h                                          conflict!
+'F'   20     linux/matroxfb.h                                        conflict!
+'F'   20     drivers/video/aty/atyfb_base.c                          conflict!
+'F'   00-0F  video/da8xx-fb.h                                        conflict!
+'F'   80-8F  linux/arcfb.h                                           conflict!
+'F'   DD     video/sstfb.h                                           conflict!
+'G'   00-3F  drivers/misc/sgi-gru/grulib.h                           conflict!
+'H'   00-7F  linux/hiddev.h                                          conflict!
+'H'   00-0F  linux/hidraw.h                                          conflict!
+'H'   01     linux/mei.h                                             conflict!
+'H'   02     linux/mei.h                                             conflict!
+'H'   03     linux/mei.h                                             conflict!
+'H'   00-0F  sound/asound.h                                          conflict!
+'H'   20-40  sound/asound_fm.h                                       conflict!
+'H'   80-8F  sound/sfnt_info.h                                       conflict!
+'H'   10-8F  sound/emu10k1.h                                         conflict!
+'H'   10-1F  sound/sb16_csp.h                                        conflict!
+'H'   10-1F  sound/hda_hwdep.h                                       conflict!
+'H'   40-4F  sound/hdspm.h                                           conflict!
+'H'   40-4F  sound/hdsp.h                                            conflict!
+'H'   90     sound/usb/usx2y/usb_stream.h
+'H'   00-0F  uapi/misc/habanalabs.h                                  conflict!
+'H'   A0     uapi/linux/usb/cdc-wdm.h
+'H'   C0-F0  net/bluetooth/hci.h                                     conflict!
+'H'   C0-DF  net/bluetooth/hidp/hidp.h                               conflict!
+'H'   C0-DF  net/bluetooth/cmtp/cmtp.h                               conflict!
+'H'   C0-DF  net/bluetooth/bnep/bnep.h                               conflict!
+'H'   F1     linux/hid-roccat.h                                      <mailto:erazor_de@users.sourceforge.net>
+'H'   F8-FA  sound/firewire.h
+'I'   all    linux/isdn.h                                            conflict!
+'I'   00-0F  drivers/isdn/divert/isdn_divert.h                       conflict!
+'I'   40-4F  linux/mISDNif.h                                         conflict!
+'J'   00-1F  drivers/scsi/gdth_ioctl.h
+'K'   all    linux/kd.h
+'L'   00-1F  linux/loop.h                                            conflict!
+'L'   10-1F  drivers/scsi/mpt3sas/mpt3sas_ctl.h                      conflict!
+'L'   20-2F  linux/lightnvm.h
+'L'   E0-FF  linux/ppdd.h                                            encrypted disk device driver
+                                                                     <http://linux01.gwdg.de/~alatham/ppdd.html>
+'M'   all    linux/soundcard.h                                       conflict!
+'M'   01-16  mtd/mtd-abi.h                                           conflict!
+      and    drivers/mtd/mtdchar.c
+'M'   01-03  drivers/scsi/megaraid/megaraid_sas.h
+'M'   00-0F  drivers/video/fsl-diu-fb.h                              conflict!
+'N'   00-1F  drivers/usb/scanner.h
+'N'   40-7F  drivers/block/nvme.c
+'O'   00-06  mtd/ubi-user.h                                          UBI
+'P'   all    linux/soundcard.h                                       conflict!
+'P'   60-6F  sound/sscape_ioctl.h                                    conflict!
+'P'   00-0F  drivers/usb/class/usblp.c                               conflict!
+'P'   01-09  drivers/misc/pci_endpoint_test.c                        conflict!
+'Q'   all    linux/soundcard.h
+'R'   00-1F  linux/random.h                                          conflict!
+'R'   01     linux/rfkill.h                                          conflict!
+'R'   C0-DF  net/bluetooth/rfcomm.h
+'S'   all    linux/cdrom.h                                           conflict!
+'S'   80-81  scsi/scsi_ioctl.h                                       conflict!
+'S'   82-FF  scsi/scsi.h                                             conflict!
+'S'   00-7F  sound/asequencer.h                                      conflict!
+'T'   all    linux/soundcard.h                                       conflict!
+'T'   00-AF  sound/asound.h                                          conflict!
+'T'   all    arch/x86/include/asm/ioctls.h                           conflict!
+'T'   C0-DF  linux/if_tun.h                                          conflict!
+'U'   all    sound/asound.h                                          conflict!
+'U'   00-CF  linux/uinput.h                                          conflict!
+'U'   00-EF  linux/usbdevice_fs.h
+'U'   C0-CF  drivers/bluetooth/hci_uart.h
+'V'   all    linux/vt.h                                              conflict!
+'V'   all    linux/videodev2.h                                       conflict!
+'V'   C0     linux/ivtvfb.h                                          conflict!
+'V'   C0     linux/ivtv.h                                            conflict!
+'V'   C0     media/davinci/vpfe_capture.h                            conflict!
+'V'   C0     media/si4713.h                                          conflict!
+'W'   00-1F  linux/watchdog.h                                        conflict!
+'W'   00-1F  linux/wanrouter.h                                       conflict! (pre 3.9)
+'W'   00-3F  sound/asound.h                                          conflict!
+'W'   40-5F  drivers/pci/switch/switchtec.c
+'W'   60-61  linux/watch_queue.h
+'X'   all    fs/xfs/xfs_fs.h,                                        conflict!
+             fs/xfs/linux-2.6/xfs_ioctl32.h,
+             include/linux/falloc.h,
+             linux/fs.h,
+'X'   all    fs/ocfs2/ocfs_fs.h                                      conflict!
+'X'   01     linux/pktcdvd.h                                         conflict!
+'Y'   all    linux/cyclades.h
+'Z'   14-15  drivers/message/fusion/mptctl.h
+'['   00-3F  linux/usb/tmc.h                                         USB Test and Measurement Devices
+                                                                     <mailto:gregkh@linuxfoundation.org>
+'a'   all    linux/atm*.h, linux/sonet.h                             ATM on linux
+                                                                     <http://lrcwww.epfl.ch/>
+'a'   00-0F  drivers/crypto/qat/qat_common/adf_cfg_common.h          conflict! qat driver
+'b'   00-FF                                                          conflict! bit3 vme host bridge
+                                                                     <mailto:natalia@nikhefk.nikhef.nl>
+'c'   all    linux/cm4000_cs.h                                       conflict!
+'c'   00-7F  linux/comstats.h                                        conflict!
+'c'   00-7F  linux/coda.h                                            conflict!
+'c'   00-1F  linux/chio.h                                            conflict!
+'c'   80-9F  arch/s390/include/asm/chsc.h                            conflict!
+'c'   A0-AF  arch/x86/include/asm/msr.h conflict!
+'d'   00-FF  linux/char/drm/drm.h                                    conflict!
+'d'   02-40  pcmcia/ds.h                                             conflict!
+'d'   F0-FF  linux/digi1.h
+'e'   all    linux/digi1.h                                           conflict!
+'f'   00-1F  linux/ext2_fs.h                                         conflict!
+'f'   00-1F  linux/ext3_fs.h                                         conflict!
+'f'   00-0F  fs/jfs/jfs_dinode.h                                     conflict!
+'f'   00-0F  fs/ext4/ext4.h                                          conflict!
+'f'   00-0F  linux/fs.h                                              conflict!
+'f'   00-0F  fs/ocfs2/ocfs2_fs.h                                     conflict!
+'f'   13-27  linux/fscrypt.h
+'f'   81-8F  linux/fsverity.h
+'g'   00-0F  linux/usb/gadgetfs.h
+'g'   20-2F  linux/usb/g_printer.h
+'h'   00-7F                                                          conflict! Charon filesystem
+                                                                     <mailto:zapman@interlan.net>
+'h'   00-1F  linux/hpet.h                                            conflict!
+'h'   80-8F  fs/hfsplus/ioctl.c
+'i'   00-3F  linux/i2o-dev.h                                         conflict!
+'i'   0B-1F  linux/ipmi.h                                            conflict!
+'i'   80-8F  linux/i8k.h
+'j'   00-3F  linux/joystick.h
+'k'   00-0F  linux/spi/spidev.h                                      conflict!
+'k'   00-05  video/kyro.h                                            conflict!
+'k'   10-17  linux/hsi/hsi_char.h                                    HSI character device
+'l'   00-3F  linux/tcfs_fs.h                                         transparent cryptographic file system
+                                                                     <http://web.archive.org/web/%2A/http://mikonos.dia.unisa.it/tcfs>
+'l'   40-7F  linux/udf_fs_i.h                                        in development:
+                                                                     <http://sourceforge.net/projects/linux-udf/>
+'m'   00-09  linux/mmtimer.h                                         conflict!
+'m'   all    linux/mtio.h                                            conflict!
+'m'   all    linux/soundcard.h                                       conflict!
+'m'   all    linux/synclink.h                                        conflict!
+'m'   00-19  drivers/message/fusion/mptctl.h                         conflict!
+'m'   00     drivers/scsi/megaraid/megaraid_ioctl.h                  conflict!
+'n'   00-7F  linux/ncp_fs.h and fs/ncpfs/ioctl.c
+'n'   80-8F  uapi/linux/nilfs2_api.h                                 NILFS2
+'n'   E0-FF  linux/matroxfb.h                                        matroxfb
+'o'   00-1F  fs/ocfs2/ocfs2_fs.h                                     OCFS2
+'o'   00-03  mtd/ubi-user.h                                          conflict! (OCFS2 and UBI overlaps)
+'o'   40-41  mtd/ubi-user.h                                          UBI
+'o'   01-A1  `linux/dvb/*.h`                                         DVB
+'p'   00-0F  linux/phantom.h                                         conflict! (OpenHaptics needs this)
+'p'   00-1F  linux/rtc.h                                             conflict!
+'p'   40-7F  linux/nvram.h
+'p'   80-9F  linux/ppdev.h                                           user-space parport
+                                                                     <mailto:tim@cyberelk.net>
+'p'   A1-A5  linux/pps.h                                             LinuxPPS
+                                                                     <mailto:giometti@linux.it>
+'q'   00-1F  linux/serio.h
+'q'   80-FF  linux/telephony.h                                       Internet PhoneJACK, Internet LineJACK
+             linux/ixjuser.h                                         <http://web.archive.org/web/%2A/http://www.quicknet.net>
+'r'   00-1F  linux/msdos_fs.h and fs/fat/dir.c
+'s'   all    linux/cdk.h
+'t'   00-7F  linux/ppp-ioctl.h
+'t'   80-8F  linux/isdn_ppp.h
+'t'   90-91  linux/toshiba.h                                         toshiba and toshiba_acpi SMM
+'u'   00-1F  linux/smb_fs.h                                          gone
+'u'   20-3F  linux/uvcvideo.h                                        USB video class host driver
+'u'   40-4f  linux/udmabuf.h                                         userspace dma-buf misc device
+'v'   00-1F  linux/ext2_fs.h                                         conflict!
+'v'   00-1F  linux/fs.h                                              conflict!
+'v'   00-0F  linux/sonypi.h                                          conflict!
+'v'   00-0F  media/v4l2-subdev.h                                     conflict!
+'v'   20-27  arch/powerpc/include/uapi/asm/vas-api.h		     VAS API
+'v'   C0-FF  linux/meye.h                                            conflict!
+'w'   all                                                            CERN SCI driver
+'y'   00-1F                                                          packet based user level communications
+                                                                     <mailto:zapman@interlan.net>
+'z'   00-3F                                                          CAN bus card conflict!
+                                                                     <mailto:hdstich@connectu.ulm.circular.de>
+'z'   40-7F                                                          CAN bus card conflict!
+                                                                     <mailto:oe@port.de>
+'z'   10-4F  drivers/s390/crypto/zcrypt_api.h                        conflict!
+'|'   00-7F  linux/media.h
+0x80  00-1F  linux/fb.h
+0x89  00-06  arch/x86/include/asm/sockios.h
+0x89  0B-DF  linux/sockios.h
+0x89  E0-EF  linux/sockios.h                                         SIOCPROTOPRIVATE range
+0x89  F0-FF  linux/sockios.h                                         SIOCDEVPRIVATE range
+0x8B  all    linux/wireless.h
+0x8C  00-3F                                                          WiNRADiO driver
+                                                                     <http://www.winradio.com.au/>
+0x90  00     drivers/cdrom/sbpcd.h
+0x92  00-0F  drivers/usb/mon/mon_bin.c
+0x93  60-7F  linux/auto_fs.h
+0x94  all    fs/btrfs/ioctl.h                                        Btrfs filesystem
+             and linux/fs.h                                          some lifted to vfs/generic
+0x97  00-7F  fs/ceph/ioctl.h                                         Ceph file system
+0x99  00-0F                                                          537-Addinboard driver
+                                                                     <mailto:buk@buks.ipn.de>
+0xA0  all    linux/sdp/sdp.h                                         Industrial Device Project
+                                                                     <mailto:kenji@bitgate.com>
+0xA1  0      linux/vtpm_proxy.h                                      TPM Emulator Proxy Driver
+0xA3  80-8F                                                          Port ACL  in development:
+                                                                     <mailto:tlewis@mindspring.com>
+0xA3  90-9F  linux/dtlk.h
+0xA4  00-1F  uapi/linux/tee.h                                        Generic TEE subsystem
+0xAA  00-3F  linux/uapi/linux/userfaultfd.h
+0xAB  00-1F  linux/nbd.h
+0xAC  00-1F  linux/raw.h
+0xAD  00                                                             Netfilter device in development:
+                                                                     <mailto:rusty@rustcorp.com.au>
+0xAE  00-1F  linux/kvm.h                                             Kernel-based Virtual Machine
+                                                                     <mailto:kvm@vger.kernel.org>
+0xAE  40-FF  linux/kvm.h                                             Kernel-based Virtual Machine
+                                                                     <mailto:kvm@vger.kernel.org>
+0xAE  20-3F  linux/nitro_enclaves.h                                  Nitro Enclaves
+0xAF  00-1F  linux/fsl_hypervisor.h                                  Freescale hypervisor
+0xB0  all                                                            RATIO devices in development:
+                                                                     <mailto:vgo@ratio.de>
+0xB1  00-1F                                                          PPPoX
+                                                                     <mailto:mostrows@styx.uwaterloo.ca>
+0xB3  00     linux/mmc/ioctl.h
+0xB4  00-0F  linux/gpio.h                                            <mailto:linux-gpio@vger.kernel.org>
+0xB5  00-0F  uapi/linux/rpmsg.h                                      <mailto:linux-remoteproc@vger.kernel.org>
+0xB6  all    linux/fpga-dfl.h
+0xB7  all    uapi/linux/remoteproc_cdev.h                            <mailto:linux-remoteproc@vger.kernel.org>
+0xC0  00-0F  linux/usb/iowarrior.h
+0xCA  00-0F  uapi/misc/cxl.h
+0xCA  10-2F  uapi/misc/ocxl.h
+0xCA  80-BF  uapi/scsi/cxlflash_ioctl.h
+0xCB  00-1F                                                          CBM serial IEC bus in development:
+                                                                     <mailto:michael.klein@puffin.lb.shuttle.de>
+0xCC  00-0F  drivers/misc/ibmvmc.h                                   pseries VMC driver
+0xCD  01     linux/reiserfs_fs.h
+0xCF  02     fs/cifs/ioctl.c
+0xDB  00-0F  drivers/char/mwave/mwavepub.h
+0xDD  00-3F                                                          ZFCP device driver see drivers/s390/scsi/
+                                                                     <mailto:aherrman@de.ibm.com>
+0xE5  00-3F  linux/fuse.h
+0xEC  00-01  drivers/platform/chrome/cros_ec_dev.h                   ChromeOS EC driver
+0xF3  00-3F  drivers/usb/misc/sisusbvga/sisusb.h                     sisfb (in development)
+                                                                     <mailto:thomas@winischhofer.net>
+0xF6  all                                                            LTTng Linux Trace Toolkit Next Generation
+                                                                     <mailto:mathieu.desnoyers@efficios.com>
+0xFD  all    linux/dm-ioctl.h
+0xFE  all    linux/isst_if.h
+====  =====  ======================================================= ================================================================
diff --git a/Documentation/userspace-api/iommu.rst b/Documentation/userspace-api/iommu.rst
new file mode 100644
index 000000000..d3108c151
--- /dev/null
+++ b/Documentation/userspace-api/iommu.rst
@@ -0,0 +1,209 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. iommu:
+
+=====================================
+IOMMU Userspace API
+=====================================
+
+IOMMU UAPI is used for virtualization cases where communications are
+needed between physical and virtual IOMMU drivers. For baremetal
+usage, the IOMMU is a system device which does not need to communicate
+with userspace directly.
+
+The primary use cases are guest Shared Virtual Address (SVA) and
+guest IO virtual address (IOVA), wherein the vIOMMU implementation
+relies on the physical IOMMU and for this reason requires interactions
+with the host driver.
+
+.. contents:: :local:
+
+Functionalities
+===============
+Communications of user and kernel involve both directions. The
+supported user-kernel APIs are as follows:
+
+1. Bind/Unbind guest PASID (e.g. Intel VT-d)
+2. Bind/Unbind guest PASID table (e.g. ARM SMMU)
+3. Invalidate IOMMU caches upon guest requests
+4. Report errors to the guest and serve page requests
+
+Requirements
+============
+The IOMMU UAPIs are generic and extensible to meet the following
+requirements:
+
+1. Emulated and para-virtualised vIOMMUs
+2. Multiple vendors (Intel VT-d, ARM SMMU, etc.)
+3. Extensions to the UAPI shall not break existing userspace
+
+Interfaces
+==========
+Although the data structures defined in IOMMU UAPI are self-contained,
+there are no user API functions introduced. Instead, IOMMU UAPI is
+designed to work with existing user driver frameworks such as VFIO.
+
+Extension Rules & Precautions
+-----------------------------
+When IOMMU UAPI gets extended, the data structures can *only* be
+modified in two ways:
+
+1. Adding new fields by re-purposing the padding[] field. No size change.
+2. Adding new union members at the end. May increase the structure sizes.
+
+No new fields can be added *after* the variable sized union in that it
+will break backward compatibility when offset moves. A new flag must
+be introduced whenever a change affects the structure using either
+method. The IOMMU driver processes the data based on flags which
+ensures backward compatibility.
+
+Version field is only reserved for the unlikely event of UAPI upgrade
+at its entirety.
+
+It's *always* the caller's responsibility to indicate the size of the
+structure passed by setting argsz appropriately.
+Though at the same time, argsz is user provided data which is not
+trusted. The argsz field allows the user app to indicate how much data
+it is providing; it's still the kernel's responsibility to validate
+whether it's correct and sufficient for the requested operation.
+
+Compatibility Checking
+----------------------
+When IOMMU UAPI extension results in some structure size increase,
+IOMMU UAPI code shall handle the following cases:
+
+1. User and kernel has exact size match
+2. An older user with older kernel header (smaller UAPI size) running on a
+   newer kernel (larger UAPI size)
+3. A newer user with newer kernel header (larger UAPI size) running
+   on an older kernel.
+4. A malicious/misbehaving user passing illegal/invalid size but within
+   range. The data may contain garbage.
+
+Feature Checking
+----------------
+While launching a guest with vIOMMU, it is strongly advised to check
+the compatibility upfront, as some subsequent errors happening during
+vIOMMU operation, such as cache invalidation failures cannot be nicely
+escalated to the guest due to IOMMU specifications. This can lead to
+catastrophic failures for the users.
+
+User applications such as QEMU are expected to import kernel UAPI
+headers. Backward compatibility is supported per feature flags.
+For example, an older QEMU (with older kernel header) can run on newer
+kernel. Newer QEMU (with new kernel header) may refuse to initialize
+on an older kernel if new feature flags are not supported by older
+kernel. Simply recompiling existing code with newer kernel header should
+not be an issue in that only existing flags are used.
+
+IOMMU vendor driver should report the below features to IOMMU UAPI
+consumers (e.g. via VFIO).
+
+1. IOMMU_NESTING_FEAT_SYSWIDE_PASID
+2. IOMMU_NESTING_FEAT_BIND_PGTBL
+3. IOMMU_NESTING_FEAT_BIND_PASID_TABLE
+4. IOMMU_NESTING_FEAT_CACHE_INVLD
+5. IOMMU_NESTING_FEAT_PAGE_REQUEST
+
+Take VFIO as example, upon request from VFIO userspace (e.g. QEMU),
+VFIO kernel code shall query IOMMU vendor driver for the support of
+the above features. Query result can then be reported back to the
+userspace caller. Details can be found in
+Documentation/driver-api/vfio.rst.
+
+
+Data Passing Example with VFIO
+------------------------------
+As the ubiquitous userspace driver framework, VFIO is already IOMMU
+aware and shares many key concepts such as device model, group, and
+protection domain. Other user driver frameworks can also be extended
+to support IOMMU UAPI but it is outside the scope of this document.
+
+In this tight-knit VFIO-IOMMU interface, the ultimate consumer of the
+IOMMU UAPI data is the host IOMMU driver. VFIO facilitates user-kernel
+transport, capability checking, security, and life cycle management of
+process address space ID (PASID).
+
+VFIO layer conveys the data structures down to the IOMMU driver. It
+follows the pattern below::
+
+   struct {
+	__u32 argsz;
+	__u32 flags;
+	__u8  data[];
+   };
+
+Here data[] contains the IOMMU UAPI data structures. VFIO has the
+freedom to bundle the data as well as parse data size based on its own flags.
+
+In order to determine the size and feature set of the user data, argsz
+and flags (or the equivalent) are also embedded in the IOMMU UAPI data
+structures.
+
+A "__u32 argsz" field is *always* at the beginning of each structure.
+
+For example:
+::
+
+   struct iommu_cache_invalidate_info {
+	__u32	argsz;
+	#define IOMMU_CACHE_INVALIDATE_INFO_VERSION_1 1
+	__u32	version;
+	/* IOMMU paging structure cache */
+	#define IOMMU_CACHE_INV_TYPE_IOTLB	(1 << 0) /* IOMMU IOTLB */
+	#define IOMMU_CACHE_INV_TYPE_DEV_IOTLB	(1 << 1) /* Device IOTLB */
+	#define IOMMU_CACHE_INV_TYPE_PASID	(1 << 2) /* PASID cache */
+	#define IOMMU_CACHE_INV_TYPE_NR		(3)
+	__u8	cache;
+	__u8	granularity;
+	__u8	padding[6];
+	union {
+		struct iommu_inv_pasid_info pasid_info;
+		struct iommu_inv_addr_info addr_info;
+	} granu;
+   };
+
+VFIO is responsible for checking its own argsz and flags. It then
+invokes appropriate IOMMU UAPI functions. The user pointers are passed
+to the IOMMU layer for further processing. The responsibilities are
+divided as follows:
+
+- Generic IOMMU layer checks argsz range based on UAPI data in the
+  current kernel version.
+
+- Generic IOMMU layer checks content of the UAPI data for non-zero
+  reserved bits in flags, padding fields, and unsupported version.
+  This is to ensure not breaking userspace in the future when these
+  fields or flags are used.
+
+- Vendor IOMMU driver checks argsz based on vendor flags. UAPI data
+  is consumed based on flags. Vendor driver has access to
+  unadulterated argsz value in case of vendor specific future
+  extensions. Currently, it does not perform the copy_from_user()
+  itself. A __user pointer can be provided in some future scenarios
+  where there's vendor data outside of the structure definition.
+
+IOMMU code treats UAPI data in two categories:
+
+- structure contains vendor data
+  (Example: iommu_uapi_cache_invalidate())
+
+- structure contains only generic data
+  (Example: iommu_uapi_sva_bind_gpasid())
+
+
+
+Sharing UAPI with in-kernel users
+---------------------------------
+For UAPIs that are shared with in-kernel users, a wrapper function is
+provided to distinguish the callers. For example,
+
+Userspace caller ::
+
+  int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
+                                   struct device *dev,
+                                   void __user *udata)
+
+In-kernel caller ::
+
+  int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
+                              struct device *dev, ioasid_t ioasid);
diff --git a/Documentation/userspace-api/media/Makefile b/Documentation/userspace-api/media/Makefile
new file mode 100644
index 000000000..81a4a1a53
--- /dev/null
+++ b/Documentation/userspace-api/media/Makefile
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Rules to convert a .h file to inline RST documentation
+
+SRC_DIR=$(srctree)/Documentation/userspace-api/media
+PARSER = $(srctree)/Documentation/sphinx/parse-headers.pl
+UAPI = $(srctree)/include/uapi/linux
+KAPI = $(srctree)/include/linux
+
+FILES = audio.h.rst ca.h.rst dmx.h.rst frontend.h.rst net.h.rst video.h.rst \
+	  videodev2.h.rst media.h.rst cec.h.rst lirc.h.rst
+
+TARGETS := $(addprefix $(BUILDDIR)/, $(FILES))
+
+gen_rst = \
+	echo ${PARSER} $< $@ $(SRC_DIR)/$(notdir $@).exceptions; \
+	${PARSER} $< $@ $(SRC_DIR)/$(notdir $@).exceptions
+
+quiet_gen_rst = echo '  PARSE   $(patsubst $(srctree)/%,%,$<)'; \
+	${PARSER} $< $@ $(SRC_DIR)/$(notdir $@).exceptions
+
+silent_gen_rst = ${gen_rst}
+
+$(BUILDDIR)/audio.h.rst: ${UAPI}/dvb/audio.h ${PARSER} $(SRC_DIR)/audio.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/ca.h.rst: ${UAPI}/dvb/ca.h ${PARSER} $(SRC_DIR)/ca.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/dmx.h.rst: ${UAPI}/dvb/dmx.h ${PARSER} $(SRC_DIR)/dmx.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/frontend.h.rst: ${UAPI}/dvb/frontend.h ${PARSER} $(SRC_DIR)/frontend.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/net.h.rst: ${UAPI}/dvb/net.h ${PARSER} $(SRC_DIR)/net.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/video.h.rst: ${UAPI}/dvb/video.h ${PARSER} $(SRC_DIR)/video.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/videodev2.h.rst: ${UAPI}/videodev2.h ${PARSER} $(SRC_DIR)/videodev2.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/media.h.rst: ${UAPI}/media.h ${PARSER} $(SRC_DIR)/media.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/cec.h.rst: ${UAPI}/cec.h ${PARSER} $(SRC_DIR)/cec.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+$(BUILDDIR)/lirc.h.rst: ${UAPI}/lirc.h ${PARSER} $(SRC_DIR)/lirc.h.rst.exceptions
+	@$($(quiet)gen_rst)
+
+# Media build rules
+
+.PHONY: all html epub xml latex
+
+all: $(IMGDOT) $(BUILDDIR) ${TARGETS}
+html: all
+epub: all
+xml: all
+latex: $(IMGPDF) all
+linkcheck:
+
+clean:
+	-rm -f $(DOTTGT) $(IMGTGT) ${TARGETS} 2>/dev/null
+
+$(BUILDDIR):
+	$(Q)mkdir -p $@
diff --git a/Documentation/userspace-api/media/audio.h.rst.exceptions b/Documentation/userspace-api/media/audio.h.rst.exceptions
new file mode 100644
index 000000000..cf6620477
--- /dev/null
+++ b/Documentation/userspace-api/media/audio.h.rst.exceptions
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _DVBAUDIO_H_
+
+# Undocumented audio caps, as this is a deprecated API anyway
+ignore define AUDIO_CAP_DTS
+ignore define AUDIO_CAP_LPCM
+ignore define AUDIO_CAP_MP1
+ignore define AUDIO_CAP_MP2
+ignore define AUDIO_CAP_MP3
+ignore define AUDIO_CAP_AAC
+ignore define AUDIO_CAP_OGG
+ignore define AUDIO_CAP_SDDS
+ignore define AUDIO_CAP_AC3
+
+# some typedefs should point to struct/enums
+replace typedef audio_mixer_t :c:type:`audio_mixer`
+replace typedef audio_status_t :c:type:`audio_status`
diff --git a/Documentation/userspace-api/media/ca.h.rst.exceptions b/Documentation/userspace-api/media/ca.h.rst.exceptions
new file mode 100644
index 000000000..f6828238e
--- /dev/null
+++ b/Documentation/userspace-api/media/ca.h.rst.exceptions
@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _DVBCA_H_
+
+# struct ca_slot_info defines
+replace define CA_CI :c:type:`ca_slot_info`
+replace define CA_CI_LINK :c:type:`ca_slot_info`
+replace define CA_CI_PHYS :c:type:`ca_slot_info`
+replace define CA_DESCR :c:type:`ca_slot_info`
+replace define CA_SC :c:type:`ca_slot_info`
+replace define CA_CI_MODULE_PRESENT :c:type:`ca_slot_info`
+replace define CA_CI_MODULE_READY :c:type:`ca_slot_info`
+
+# struct ca_descr_info defines
+replace define CA_ECD :c:type:`ca_descr_info`
+replace define CA_NDS :c:type:`ca_descr_info`
+replace define CA_DSS :c:type:`ca_descr_info`
+
+# some typedefs should point to struct/enums
+replace typedef ca_slot_info_t :c:type:`ca_slot_info`
+replace typedef ca_descr_info_t :c:type:`ca_descr_info`
+replace typedef ca_caps_t :c:type:`ca_caps`
+replace typedef ca_msg_t :c:type:`ca_msg`
+replace typedef ca_descr_t :c:type:`ca_descr`
diff --git a/Documentation/userspace-api/media/cec.h.rst.exceptions b/Documentation/userspace-api/media/cec.h.rst.exceptions
new file mode 100644
index 000000000..d83790cca
--- /dev/null
+++ b/Documentation/userspace-api/media/cec.h.rst.exceptions
@@ -0,0 +1,575 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _CEC_UAPI_H
+
+# define macros to ignore
+
+ignore define CEC_MAX_MSG_SIZE
+ignore define CEC_MAX_LOG_ADDRS
+
+ignore define CEC_LOG_ADDR_MASK_TV
+ignore define CEC_LOG_ADDR_MASK_RECORD
+ignore define CEC_LOG_ADDR_MASK_TUNER
+ignore define CEC_LOG_ADDR_MASK_PLAYBACK
+ignore define CEC_LOG_ADDR_MASK_AUDIOSYSTEM
+ignore define CEC_LOG_ADDR_MASK_BACKUP
+ignore define CEC_LOG_ADDR_MASK_SPECIFIC
+ignore define CEC_LOG_ADDR_MASK_UNREGISTERED
+
+# Shouldn't them be documented?
+ignore define CEC_LOG_ADDR_INVALID
+ignore define CEC_PHYS_ADDR_INVALID
+
+ignore define CEC_VENDOR_ID_NONE
+
+ignore define CEC_MODE_INITIATOR_MSK
+ignore define CEC_MODE_FOLLOWER_MSK
+
+# Part of CEC 2.0 spec - shouldn't be documented too?
+ignore define CEC_LOG_ADDR_TV
+ignore define CEC_LOG_ADDR_RECORD_1
+ignore define CEC_LOG_ADDR_RECORD_2
+ignore define CEC_LOG_ADDR_TUNER_1
+ignore define CEC_LOG_ADDR_PLAYBACK_1
+ignore define CEC_LOG_ADDR_AUDIOSYSTEM
+ignore define CEC_LOG_ADDR_TUNER_2
+ignore define CEC_LOG_ADDR_TUNER_3
+ignore define CEC_LOG_ADDR_PLAYBACK_2
+ignore define CEC_LOG_ADDR_RECORD_3
+ignore define CEC_LOG_ADDR_TUNER_4
+ignore define CEC_LOG_ADDR_PLAYBACK_3
+ignore define CEC_LOG_ADDR_BACKUP_1
+ignore define CEC_LOG_ADDR_BACKUP_2
+ignore define CEC_LOG_ADDR_SPECIFIC
+ignore define CEC_LOG_ADDR_UNREGISTERED
+ignore define CEC_LOG_ADDR_BROADCAST
+
+# IMHO, those should also be documented
+
+ignore define CEC_MSG_ACTIVE_SOURCE
+ignore define CEC_MSG_IMAGE_VIEW_ON
+ignore define CEC_MSG_TEXT_VIEW_ON
+
+ignore define CEC_MSG_INACTIVE_SOURCE
+ignore define CEC_MSG_REQUEST_ACTIVE_SOURCE
+ignore define CEC_MSG_ROUTING_CHANGE
+ignore define CEC_MSG_ROUTING_INFORMATION
+ignore define CEC_MSG_SET_STREAM_PATH
+
+ignore define CEC_MSG_STANDBY
+
+ignore define CEC_MSG_RECORD_OFF
+ignore define CEC_MSG_RECORD_ON
+
+ignore define CEC_OP_RECORD_SRC_OWN
+ignore define CEC_OP_RECORD_SRC_DIGITAL
+ignore define CEC_OP_RECORD_SRC_ANALOG
+ignore define CEC_OP_RECORD_SRC_EXT_PLUG
+ignore define CEC_OP_RECORD_SRC_EXT_PHYS_ADDR
+
+ignore define CEC_OP_SERVICE_ID_METHOD_BY_DIG_ID
+ignore define CEC_OP_SERVICE_ID_METHOD_BY_CHANNEL
+
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ARIB_GEN
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ATSC_GEN
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_GEN
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ARIB_BS
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ARIB_CS
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ARIB_T
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ATSC_CABLE
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ATSC_SAT
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ATSC_T
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_C
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_S
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_S2
+ignore define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_T
+
+ignore define CEC_OP_ANA_BCAST_TYPE_CABLE
+ignore define CEC_OP_ANA_BCAST_TYPE_SATELLITE
+ignore define CEC_OP_ANA_BCAST_TYPE_TERRESTRIAL
+
+ignore define CEC_OP_BCAST_SYSTEM_PAL_BG
+ignore define CEC_OP_BCAST_SYSTEM_SECAM_LQ
+ignore define CEC_OP_BCAST_SYSTEM_PAL_M
+ignore define CEC_OP_BCAST_SYSTEM_NTSC_M
+ignore define CEC_OP_BCAST_SYSTEM_PAL_I
+ignore define CEC_OP_BCAST_SYSTEM_SECAM_DK
+ignore define CEC_OP_BCAST_SYSTEM_SECAM_BG
+ignore define CEC_OP_BCAST_SYSTEM_SECAM_L
+ignore define CEC_OP_BCAST_SYSTEM_PAL_DK
+ignore define CEC_OP_BCAST_SYSTEM_OTHER
+
+ignore define CEC_OP_CHANNEL_NUMBER_FMT_1_PART
+ignore define CEC_OP_CHANNEL_NUMBER_FMT_2_PART
+
+ignore define CEC_MSG_RECORD_STATUS
+
+ignore define CEC_OP_RECORD_STATUS_CUR_SRC
+ignore define CEC_OP_RECORD_STATUS_DIG_SERVICE
+ignore define CEC_OP_RECORD_STATUS_ANA_SERVICE
+ignore define CEC_OP_RECORD_STATUS_EXT_INPUT
+ignore define CEC_OP_RECORD_STATUS_NO_DIG_SERVICE
+ignore define CEC_OP_RECORD_STATUS_NO_ANA_SERVICE
+ignore define CEC_OP_RECORD_STATUS_NO_SERVICE
+ignore define CEC_OP_RECORD_STATUS_INVALID_EXT_PLUG
+ignore define CEC_OP_RECORD_STATUS_INVALID_EXT_PHYS_ADDR
+ignore define CEC_OP_RECORD_STATUS_UNSUP_CA
+ignore define CEC_OP_RECORD_STATUS_NO_CA_ENTITLEMENTS
+ignore define CEC_OP_RECORD_STATUS_CANT_COPY_SRC
+ignore define CEC_OP_RECORD_STATUS_NO_MORE_COPIES
+ignore define CEC_OP_RECORD_STATUS_NO_MEDIA
+ignore define CEC_OP_RECORD_STATUS_PLAYING
+ignore define CEC_OP_RECORD_STATUS_ALREADY_RECORDING
+ignore define CEC_OP_RECORD_STATUS_MEDIA_PROT
+ignore define CEC_OP_RECORD_STATUS_NO_SIGNAL
+ignore define CEC_OP_RECORD_STATUS_MEDIA_PROBLEM
+ignore define CEC_OP_RECORD_STATUS_NO_SPACE
+ignore define CEC_OP_RECORD_STATUS_PARENTAL_LOCK
+ignore define CEC_OP_RECORD_STATUS_TERMINATED_OK
+ignore define CEC_OP_RECORD_STATUS_ALREADY_TERM
+ignore define CEC_OP_RECORD_STATUS_OTHER
+
+ignore define CEC_MSG_RECORD_TV_SCREEN
+
+ignore define CEC_MSG_CLEAR_ANALOGUE_TIMER
+
+ignore define CEC_OP_REC_SEQ_SUNDAY
+ignore define CEC_OP_REC_SEQ_MONDAY
+ignore define CEC_OP_REC_SEQ_TUESDAY
+ignore define CEC_OP_REC_SEQ_WEDNESDAY
+ignore define CEC_OP_REC_SEQ_THURSDAY
+ignore define CEC_OP_REC_SEQ_FRIDAY
+ignore define CEC_OP_REC_SEQ_SATERDAY
+ignore define CEC_OP_REC_SEQ_ONCE_ONLY
+
+ignore define CEC_MSG_CLEAR_DIGITAL_TIMER
+
+ignore define CEC_MSG_CLEAR_EXT_TIMER
+
+ignore define CEC_OP_EXT_SRC_PLUG
+ignore define CEC_OP_EXT_SRC_PHYS_ADDR
+
+ignore define CEC_MSG_SET_ANALOGUE_TIMER
+ignore define CEC_MSG_SET_DIGITAL_TIMER
+ignore define CEC_MSG_SET_EXT_TIMER
+
+ignore define CEC_MSG_SET_TIMER_PROGRAM_TITLE
+ignore define CEC_MSG_TIMER_CLEARED_STATUS
+
+ignore define CEC_OP_TIMER_CLR_STAT_RECORDING
+ignore define CEC_OP_TIMER_CLR_STAT_NO_MATCHING
+ignore define CEC_OP_TIMER_CLR_STAT_NO_INFO
+ignore define CEC_OP_TIMER_CLR_STAT_CLEARED
+
+ignore define CEC_MSG_TIMER_STATUS
+
+ignore define CEC_OP_TIMER_OVERLAP_WARNING_NO_OVERLAP
+ignore define CEC_OP_TIMER_OVERLAP_WARNING_OVERLAP
+
+ignore define CEC_OP_MEDIA_INFO_UNPROT_MEDIA
+ignore define CEC_OP_MEDIA_INFO_PROT_MEDIA
+ignore define CEC_OP_MEDIA_INFO_NO_MEDIA
+
+ignore define CEC_OP_PROG_IND_NOT_PROGRAMMED
+ignore define CEC_OP_PROG_IND_PROGRAMMED
+
+ignore define CEC_OP_PROG_INFO_ENOUGH_SPACE
+ignore define CEC_OP_PROG_INFO_NOT_ENOUGH_SPACE
+ignore define CEC_OP_PROG_INFO_MIGHT_NOT_BE_ENOUGH_SPACE
+ignore define CEC_OP_PROG_INFO_NONE_AVAILABLE
+
+ignore define CEC_OP_PROG_ERROR_NO_FREE_TIMER
+ignore define CEC_OP_PROG_ERROR_DATE_OUT_OF_RANGE
+ignore define CEC_OP_PROG_ERROR_REC_SEQ_ERROR
+ignore define CEC_OP_PROG_ERROR_INV_EXT_PLUG
+ignore define CEC_OP_PROG_ERROR_INV_EXT_PHYS_ADDR
+ignore define CEC_OP_PROG_ERROR_CA_UNSUPP
+ignore define CEC_OP_PROG_ERROR_INSUF_CA_ENTITLEMENTS
+ignore define CEC_OP_PROG_ERROR_RESOLUTION_UNSUPP
+ignore define CEC_OP_PROG_ERROR_PARENTAL_LOCK
+ignore define CEC_OP_PROG_ERROR_CLOCK_FAILURE
+ignore define CEC_OP_PROG_ERROR_DUPLICATE
+
+ignore define CEC_MSG_CEC_VERSION
+
+ignore define CEC_OP_CEC_VERSION_1_3A
+ignore define CEC_OP_CEC_VERSION_1_4
+ignore define CEC_OP_CEC_VERSION_2_0
+
+ignore define CEC_MSG_GET_CEC_VERSION
+ignore define CEC_MSG_GIVE_PHYSICAL_ADDR
+ignore define CEC_MSG_GET_MENU_LANGUAGE
+ignore define CEC_MSG_REPORT_PHYSICAL_ADDR
+
+ignore define CEC_OP_PRIM_DEVTYPE_TV
+ignore define CEC_OP_PRIM_DEVTYPE_RECORD
+ignore define CEC_OP_PRIM_DEVTYPE_TUNER
+ignore define CEC_OP_PRIM_DEVTYPE_PLAYBACK
+ignore define CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM
+ignore define CEC_OP_PRIM_DEVTYPE_SWITCH
+ignore define CEC_OP_PRIM_DEVTYPE_PROCESSOR
+
+ignore define CEC_MSG_SET_MENU_LANGUAGE
+ignore define CEC_MSG_REPORT_FEATURES
+
+ignore define CEC_OP_ALL_DEVTYPE_TV
+ignore define CEC_OP_ALL_DEVTYPE_RECORD
+ignore define CEC_OP_ALL_DEVTYPE_TUNER
+ignore define CEC_OP_ALL_DEVTYPE_PLAYBACK
+ignore define CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM
+ignore define CEC_OP_ALL_DEVTYPE_SWITCH
+
+ignore define CEC_OP_FEAT_EXT
+
+ignore define CEC_OP_FEAT_RC_TV_PROFILE_NONE
+ignore define CEC_OP_FEAT_RC_TV_PROFILE_1
+ignore define CEC_OP_FEAT_RC_TV_PROFILE_2
+ignore define CEC_OP_FEAT_RC_TV_PROFILE_3
+ignore define CEC_OP_FEAT_RC_TV_PROFILE_4
+ignore define CEC_OP_FEAT_RC_SRC_HAS_DEV_ROOT_MENU
+ignore define CEC_OP_FEAT_RC_SRC_HAS_DEV_SETUP_MENU
+ignore define CEC_OP_FEAT_RC_SRC_HAS_CONTENTS_MENU
+ignore define CEC_OP_FEAT_RC_SRC_HAS_MEDIA_TOP_MENU
+ignore define CEC_OP_FEAT_RC_SRC_HAS_MEDIA_CONTEXT_MENU
+
+ignore define CEC_OP_FEAT_DEV_HAS_RECORD_TV_SCREEN
+ignore define CEC_OP_FEAT_DEV_HAS_SET_OSD_STRING
+ignore define CEC_OP_FEAT_DEV_HAS_DECK_CONTROL
+ignore define CEC_OP_FEAT_DEV_HAS_SET_AUDIO_RATE
+ignore define CEC_OP_FEAT_DEV_SINK_HAS_ARC_TX
+ignore define CEC_OP_FEAT_DEV_SOURCE_HAS_ARC_RX
+
+ignore define CEC_MSG_GIVE_FEATURES
+
+ignore define CEC_MSG_DECK_CONTROL
+
+ignore define CEC_OP_DECK_CTL_MODE_SKIP_FWD
+ignore define CEC_OP_DECK_CTL_MODE_SKIP_REV
+ignore define CEC_OP_DECK_CTL_MODE_STOP
+ignore define CEC_OP_DECK_CTL_MODE_EJECT
+
+ignore define CEC_MSG_DECK_STATUS
+
+ignore define CEC_OP_DECK_INFO_PLAY
+ignore define CEC_OP_DECK_INFO_RECORD
+ignore define CEC_OP_DECK_INFO_PLAY_REV
+ignore define CEC_OP_DECK_INFO_STILL
+ignore define CEC_OP_DECK_INFO_SLOW
+ignore define CEC_OP_DECK_INFO_SLOW_REV
+ignore define CEC_OP_DECK_INFO_FAST_FWD
+ignore define CEC_OP_DECK_INFO_FAST_REV
+ignore define CEC_OP_DECK_INFO_NO_MEDIA
+ignore define CEC_OP_DECK_INFO_STOP
+ignore define CEC_OP_DECK_INFO_SKIP_FWD
+ignore define CEC_OP_DECK_INFO_SKIP_REV
+ignore define CEC_OP_DECK_INFO_INDEX_SEARCH_FWD
+ignore define CEC_OP_DECK_INFO_INDEX_SEARCH_REV
+ignore define CEC_OP_DECK_INFO_OTHER
+
+ignore define CEC_MSG_GIVE_DECK_STATUS
+
+ignore define CEC_OP_STATUS_REQ_ON
+ignore define CEC_OP_STATUS_REQ_OFF
+ignore define CEC_OP_STATUS_REQ_ONCE
+
+ignore define CEC_MSG_PLAY
+
+ignore define CEC_OP_PLAY_MODE_PLAY_FWD
+ignore define CEC_OP_PLAY_MODE_PLAY_REV
+ignore define CEC_OP_PLAY_MODE_PLAY_STILL
+ignore define CEC_OP_PLAY_MODE_PLAY_FAST_FWD_MIN
+ignore define CEC_OP_PLAY_MODE_PLAY_FAST_FWD_MED
+ignore define CEC_OP_PLAY_MODE_PLAY_FAST_FWD_MAX
+ignore define CEC_OP_PLAY_MODE_PLAY_FAST_REV_MIN
+ignore define CEC_OP_PLAY_MODE_PLAY_FAST_REV_MED
+ignore define CEC_OP_PLAY_MODE_PLAY_FAST_REV_MAX
+ignore define CEC_OP_PLAY_MODE_PLAY_SLOW_FWD_MIN
+ignore define CEC_OP_PLAY_MODE_PLAY_SLOW_FWD_MED
+ignore define CEC_OP_PLAY_MODE_PLAY_SLOW_FWD_MAX
+ignore define CEC_OP_PLAY_MODE_PLAY_SLOW_REV_MIN
+ignore define CEC_OP_PLAY_MODE_PLAY_SLOW_REV_MED
+ignore define CEC_OP_PLAY_MODE_PLAY_SLOW_REV_MAX
+
+ignore define CEC_MSG_GIVE_TUNER_DEVICE_STATUS
+ignore define CEC_MSG_SELECT_ANALOGUE_SERVICE
+ignore define CEC_MSG_SELECT_DIGITAL_SERVICE
+ignore define CEC_MSG_TUNER_DEVICE_STATUS
+
+ignore define CEC_OP_REC_FLAG_USED
+ignore define CEC_OP_REC_FLAG_NOT_USED
+
+ignore define CEC_OP_TUNER_DISPLAY_INFO_DIGITAL
+ignore define CEC_OP_TUNER_DISPLAY_INFO_NONE
+ignore define CEC_OP_TUNER_DISPLAY_INFO_ANALOGUE
+
+ignore define CEC_MSG_TUNER_STEP_DECREMENT
+ignore define CEC_MSG_TUNER_STEP_INCREMENT
+
+ignore define CEC_MSG_DEVICE_VENDOR_ID
+ignore define CEC_MSG_GIVE_DEVICE_VENDOR_ID
+ignore define CEC_MSG_VENDOR_COMMAND
+ignore define CEC_MSG_VENDOR_COMMAND_WITH_ID
+ignore define CEC_MSG_VENDOR_REMOTE_BUTTON_DOWN
+ignore define CEC_MSG_VENDOR_REMOTE_BUTTON_UP
+
+ignore define CEC_MSG_SET_OSD_STRING
+
+ignore define CEC_OP_DISP_CTL_DEFAULT
+ignore define CEC_OP_DISP_CTL_UNTIL_CLEARED
+ignore define CEC_OP_DISP_CTL_CLEAR
+
+ignore define CEC_MSG_GIVE_OSD_NAME
+ignore define CEC_MSG_SET_OSD_NAME
+
+ignore define CEC_MSG_MENU_REQUEST
+
+ignore define CEC_OP_MENU_REQUEST_ACTIVATE
+ignore define CEC_OP_MENU_REQUEST_DEACTIVATE
+ignore define CEC_OP_MENU_REQUEST_QUERY
+
+ignore define CEC_MSG_MENU_STATUS
+
+ignore define CEC_OP_MENU_STATE_ACTIVATED
+ignore define CEC_OP_MENU_STATE_DEACTIVATED
+
+ignore define CEC_MSG_USER_CONTROL_PRESSED
+
+ignore define CEC_OP_UI_CMD_SELECT
+ignore define CEC_OP_UI_CMD_UP
+ignore define CEC_OP_UI_CMD_DOWN
+ignore define CEC_OP_UI_CMD_LEFT
+ignore define CEC_OP_UI_CMD_RIGHT
+ignore define CEC_OP_UI_CMD_RIGHT_UP
+ignore define CEC_OP_UI_CMD_RIGHT_DOWN
+ignore define CEC_OP_UI_CMD_LEFT_UP
+ignore define CEC_OP_UI_CMD_LEFT_DOWN
+ignore define CEC_OP_UI_CMD_DEVICE_ROOT_MENU
+ignore define CEC_OP_UI_CMD_DEVICE_SETUP_MENU
+ignore define CEC_OP_UI_CMD_CONTENTS_MENU
+ignore define CEC_OP_UI_CMD_FAVORITE_MENU
+ignore define CEC_OP_UI_CMD_BACK
+ignore define CEC_OP_UI_CMD_MEDIA_TOP_MENU
+ignore define CEC_OP_UI_CMD_MEDIA_CONTEXT_SENSITIVE_MENU
+ignore define CEC_OP_UI_CMD_NUMBER_ENTRY_MODE
+ignore define CEC_OP_UI_CMD_NUMBER_11
+ignore define CEC_OP_UI_CMD_NUMBER_12
+ignore define CEC_OP_UI_CMD_NUMBER_0_OR_NUMBER_10
+ignore define CEC_OP_UI_CMD_NUMBER_1
+ignore define CEC_OP_UI_CMD_NUMBER_2
+ignore define CEC_OP_UI_CMD_NUMBER_3
+ignore define CEC_OP_UI_CMD_NUMBER_4
+ignore define CEC_OP_UI_CMD_NUMBER_5
+ignore define CEC_OP_UI_CMD_NUMBER_6
+ignore define CEC_OP_UI_CMD_NUMBER_7
+ignore define CEC_OP_UI_CMD_NUMBER_8
+ignore define CEC_OP_UI_CMD_NUMBER_9
+ignore define CEC_OP_UI_CMD_DOT
+ignore define CEC_OP_UI_CMD_ENTER
+ignore define CEC_OP_UI_CMD_CLEAR
+ignore define CEC_OP_UI_CMD_NEXT_FAVORITE
+ignore define CEC_OP_UI_CMD_CHANNEL_UP
+ignore define CEC_OP_UI_CMD_CHANNEL_DOWN
+ignore define CEC_OP_UI_CMD_PREVIOUS_CHANNEL
+ignore define CEC_OP_UI_CMD_SOUND_SELECT
+ignore define CEC_OP_UI_CMD_INPUT_SELECT
+ignore define CEC_OP_UI_CMD_DISPLAY_INFORMATION
+ignore define CEC_OP_UI_CMD_HELP
+ignore define CEC_OP_UI_CMD_PAGE_UP
+ignore define CEC_OP_UI_CMD_PAGE_DOWN
+ignore define CEC_OP_UI_CMD_POWER
+ignore define CEC_OP_UI_CMD_VOLUME_UP
+ignore define CEC_OP_UI_CMD_VOLUME_DOWN
+ignore define CEC_OP_UI_CMD_MUTE
+ignore define CEC_OP_UI_CMD_PLAY
+ignore define CEC_OP_UI_CMD_STOP
+ignore define CEC_OP_UI_CMD_PAUSE
+ignore define CEC_OP_UI_CMD_RECORD
+ignore define CEC_OP_UI_CMD_REWIND
+ignore define CEC_OP_UI_CMD_FAST_FORWARD
+ignore define CEC_OP_UI_CMD_EJECT
+ignore define CEC_OP_UI_CMD_SKIP_FORWARD
+ignore define CEC_OP_UI_CMD_SKIP_BACKWARD
+ignore define CEC_OP_UI_CMD_STOP_RECORD
+ignore define CEC_OP_UI_CMD_PAUSE_RECORD
+ignore define CEC_OP_UI_CMD_ANGLE
+ignore define CEC_OP_UI_CMD_SUB_PICTURE
+ignore define CEC_OP_UI_CMD_VIDEO_ON_DEMAND
+ignore define CEC_OP_UI_CMD_ELECTRONIC_PROGRAM_GUIDE
+ignore define CEC_OP_UI_CMD_TIMER_PROGRAMMING
+ignore define CEC_OP_UI_CMD_INITIAL_CONFIGURATION
+ignore define CEC_OP_UI_CMD_SELECT_BROADCAST_TYPE
+ignore define CEC_OP_UI_CMD_SELECT_SOUND_PRESENTATION
+ignore define CEC_OP_UI_CMD_AUDIO_DESCRIPTION
+ignore define CEC_OP_UI_CMD_INTERNET
+ignore define CEC_OP_UI_CMD_3D_MODE
+ignore define CEC_OP_UI_CMD_PLAY_FUNCTION
+ignore define CEC_OP_UI_CMD_PAUSE_PLAY_FUNCTION
+ignore define CEC_OP_UI_CMD_RECORD_FUNCTION
+ignore define CEC_OP_UI_CMD_PAUSE_RECORD_FUNCTION
+ignore define CEC_OP_UI_CMD_STOP_FUNCTION
+ignore define CEC_OP_UI_CMD_MUTE_FUNCTION
+ignore define CEC_OP_UI_CMD_RESTORE_VOLUME_FUNCTION
+ignore define CEC_OP_UI_CMD_TUNE_FUNCTION
+ignore define CEC_OP_UI_CMD_SELECT_MEDIA_FUNCTION
+ignore define CEC_OP_UI_CMD_SELECT_AV_INPUT_FUNCTION
+ignore define CEC_OP_UI_CMD_SELECT_AUDIO_INPUT_FUNCTION
+ignore define CEC_OP_UI_CMD_POWER_TOGGLE_FUNCTION
+ignore define CEC_OP_UI_CMD_POWER_OFF_FUNCTION
+ignore define CEC_OP_UI_CMD_POWER_ON_FUNCTION
+ignore define CEC_OP_UI_CMD_F1_BLUE
+ignore define CEC_OP_UI_CMD_F2_RED
+ignore define CEC_OP_UI_CMD_F3_GREEN
+ignore define CEC_OP_UI_CMD_F4_YELLOW
+ignore define CEC_OP_UI_CMD_F5
+ignore define CEC_OP_UI_CMD_DATA
+
+ignore define CEC_OP_UI_BCAST_TYPE_TOGGLE_ALL
+ignore define CEC_OP_UI_BCAST_TYPE_TOGGLE_DIG_ANA
+ignore define CEC_OP_UI_BCAST_TYPE_ANALOGUE
+ignore define CEC_OP_UI_BCAST_TYPE_ANALOGUE_T
+ignore define CEC_OP_UI_BCAST_TYPE_ANALOGUE_CABLE
+ignore define CEC_OP_UI_BCAST_TYPE_ANALOGUE_SAT
+ignore define CEC_OP_UI_BCAST_TYPE_DIGITAL
+ignore define CEC_OP_UI_BCAST_TYPE_DIGITAL_T
+ignore define CEC_OP_UI_BCAST_TYPE_DIGITAL_CABLE
+ignore define CEC_OP_UI_BCAST_TYPE_DIGITAL_SAT
+ignore define CEC_OP_UI_BCAST_TYPE_DIGITAL_COM_SAT
+ignore define CEC_OP_UI_BCAST_TYPE_DIGITAL_COM_SAT2
+ignore define CEC_OP_UI_BCAST_TYPE_IP
+
+ignore define CEC_OP_UI_SND_PRES_CTL_DUAL_MONO
+ignore define CEC_OP_UI_SND_PRES_CTL_KARAOKE
+ignore define CEC_OP_UI_SND_PRES_CTL_DOWNMIX
+ignore define CEC_OP_UI_SND_PRES_CTL_REVERB
+ignore define CEC_OP_UI_SND_PRES_CTL_EQUALIZER
+ignore define CEC_OP_UI_SND_PRES_CTL_BASS_UP
+ignore define CEC_OP_UI_SND_PRES_CTL_BASS_NEUTRAL
+ignore define CEC_OP_UI_SND_PRES_CTL_BASS_DOWN
+ignore define CEC_OP_UI_SND_PRES_CTL_TREBLE_UP
+ignore define CEC_OP_UI_SND_PRES_CTL_TREBLE_NEUTRAL
+ignore define CEC_OP_UI_SND_PRES_CTL_TREBLE_DOWN
+
+ignore define CEC_MSG_USER_CONTROL_RELEASED
+
+ignore define CEC_MSG_GIVE_DEVICE_POWER_STATUS
+ignore define CEC_MSG_REPORT_POWER_STATUS
+
+ignore define CEC_OP_POWER_STATUS_ON
+ignore define CEC_OP_POWER_STATUS_STANDBY
+ignore define CEC_OP_POWER_STATUS_TO_ON
+ignore define CEC_OP_POWER_STATUS_TO_STANDBY
+
+ignore define CEC_MSG_FEATURE_ABORT
+
+ignore define CEC_OP_ABORT_UNRECOGNIZED_OP
+ignore define CEC_OP_ABORT_INCORRECT_MODE
+ignore define CEC_OP_ABORT_NO_SOURCE
+ignore define CEC_OP_ABORT_INVALID_OP
+ignore define CEC_OP_ABORT_REFUSED
+ignore define CEC_OP_ABORT_UNDETERMINED
+
+ignore define CEC_MSG_ABORT
+
+ignore define CEC_MSG_GIVE_AUDIO_STATUS
+ignore define CEC_MSG_GIVE_SYSTEM_AUDIO_MODE_STATUS
+ignore define CEC_MSG_REPORT_AUDIO_STATUS
+
+ignore define CEC_OP_AUD_MUTE_STATUS_OFF
+ignore define CEC_OP_AUD_MUTE_STATUS_ON
+
+ignore define CEC_MSG_REPORT_SHORT_AUDIO_DESCRIPTOR
+ignore define CEC_MSG_REQUEST_SHORT_AUDIO_DESCRIPTOR
+ignore define CEC_MSG_SET_SYSTEM_AUDIO_MODE
+
+ignore define CEC_OP_SYS_AUD_STATUS_OFF
+ignore define CEC_OP_SYS_AUD_STATUS_ON
+
+ignore define CEC_MSG_SYSTEM_AUDIO_MODE_REQUEST
+ignore define CEC_MSG_SYSTEM_AUDIO_MODE_STATUS
+
+ignore define CEC_OP_AUD_FMT_ID_CEA861
+ignore define CEC_OP_AUD_FMT_ID_CEA861_CXT
+
+ignore define CEC_MSG_SET_AUDIO_RATE
+
+ignore define CEC_OP_AUD_RATE_OFF
+ignore define CEC_OP_AUD_RATE_WIDE_STD
+ignore define CEC_OP_AUD_RATE_WIDE_FAST
+ignore define CEC_OP_AUD_RATE_WIDE_SLOW
+ignore define CEC_OP_AUD_RATE_NARROW_STD
+ignore define CEC_OP_AUD_RATE_NARROW_FAST
+ignore define CEC_OP_AUD_RATE_NARROW_SLOW
+
+ignore define CEC_MSG_INITIATE_ARC
+ignore define CEC_MSG_REPORT_ARC_INITIATED
+ignore define CEC_MSG_REPORT_ARC_TERMINATED
+ignore define CEC_MSG_REQUEST_ARC_INITIATION
+ignore define CEC_MSG_REQUEST_ARC_TERMINATION
+ignore define CEC_MSG_TERMINATE_ARC
+
+ignore define CEC_MSG_REQUEST_CURRENT_LATENCY
+ignore define CEC_MSG_REPORT_CURRENT_LATENCY
+
+ignore define CEC_OP_LOW_LATENCY_MODE_OFF
+ignore define CEC_OP_LOW_LATENCY_MODE_ON
+
+ignore define CEC_OP_AUD_OUT_COMPENSATED_NA
+ignore define CEC_OP_AUD_OUT_COMPENSATED_DELAY
+ignore define CEC_OP_AUD_OUT_COMPENSATED_NO_DELAY
+ignore define CEC_OP_AUD_OUT_COMPENSATED_PARTIAL_DELAY
+
+ignore define CEC_MSG_CDC_MESSAGE
+
+ignore define CEC_MSG_CDC_HEC_INQUIRE_STATE
+ignore define CEC_MSG_CDC_HEC_REPORT_STATE
+
+ignore define CEC_OP_HEC_FUNC_STATE_NOT_SUPPORTED
+ignore define CEC_OP_HEC_FUNC_STATE_INACTIVE
+ignore define CEC_OP_HEC_FUNC_STATE_ACTIVE
+ignore define CEC_OP_HEC_FUNC_STATE_ACTIVATION_FIELD
+
+ignore define CEC_OP_HOST_FUNC_STATE_NOT_SUPPORTED
+ignore define CEC_OP_HOST_FUNC_STATE_INACTIVE
+ignore define CEC_OP_HOST_FUNC_STATE_ACTIVE
+
+ignore define CEC_OP_ENC_FUNC_STATE_EXT_CON_NOT_SUPPORTED
+ignore define CEC_OP_ENC_FUNC_STATE_EXT_CON_INACTIVE
+ignore define CEC_OP_ENC_FUNC_STATE_EXT_CON_ACTIVE
+
+ignore define CEC_OP_CDC_ERROR_CODE_NONE
+ignore define CEC_OP_CDC_ERROR_CODE_CAP_UNSUPPORTED
+ignore define CEC_OP_CDC_ERROR_CODE_WRONG_STATE
+ignore define CEC_OP_CDC_ERROR_CODE_OTHER
+
+ignore define CEC_OP_HEC_SUPPORT_NO
+ignore define CEC_OP_HEC_SUPPORT_YES
+
+ignore define CEC_OP_HEC_ACTIVATION_ON
+ignore define CEC_OP_HEC_ACTIVATION_OFF
+
+ignore define CEC_MSG_CDC_HEC_SET_STATE_ADJACENT
+ignore define CEC_MSG_CDC_HEC_SET_STATE
+
+ignore define CEC_OP_HEC_SET_STATE_DEACTIVATE
+ignore define CEC_OP_HEC_SET_STATE_ACTIVATE
+
+ignore define CEC_MSG_CDC_HEC_REQUEST_DEACTIVATION
+ignore define CEC_MSG_CDC_HEC_NOTIFY_ALIVE
+ignore define CEC_MSG_CDC_HEC_DISCOVER
+
+ignore define CEC_MSG_CDC_HPD_SET_STATE
+
+ignore define CEC_OP_HPD_STATE_CP_EDID_DISABLE
+ignore define CEC_OP_HPD_STATE_CP_EDID_ENABLE
+ignore define CEC_OP_HPD_STATE_CP_EDID_DISABLE_ENABLE
+ignore define CEC_OP_HPD_STATE_EDID_DISABLE
+ignore define CEC_OP_HPD_STATE_EDID_ENABLE
+ignore define CEC_OP_HPD_STATE_EDID_DISABLE_ENABLE
+ignore define CEC_MSG_CDC_HPD_REPORT_STATE
+
+ignore define CEC_OP_HPD_ERROR_NONE
+ignore define CEC_OP_HPD_ERROR_INITIATOR_NOT_CAPABLE
+ignore define CEC_OP_HPD_ERROR_INITIATOR_WRONG_STATE
+ignore define CEC_OP_HPD_ERROR_OTHER
+ignore define CEC_OP_HPD_ERROR_NONE_NO_VIDEO
diff --git a/Documentation/userspace-api/media/cec/cec-api.rst b/Documentation/userspace-api/media/cec/cec-api.rst
new file mode 100644
index 000000000..4d229ed8a
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-api.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. include:: <isonum.txt>
+
+.. _cec:
+
+#########################################
+Part V - Consumer Electronics Control API
+#########################################
+
+This part describes the CEC: Consumer Electronics Control
+
+
+.. only:: html
+
+   .. class:: toc-title
+
+        Table of Contents
+
+.. toctree::
+    :maxdepth: 5
+    :numbered:
+
+    cec-intro
+    cec-funcs
+    cec-pin-error-inj
+    cec-header
+
+
+**********************
+Revision and Copyright
+**********************
+Authors:
+
+- Verkuil, Hans <hverkuil-cisco@xs4all.nl>
+
+ - Initial version.
+
+**Copyright** |copy| 2016 : Hans Verkuil
+
+****************
+Revision History
+****************
+
+:revision: 1.0.0 / 2016-03-17 (*hv*)
+
+Initial revision
diff --git a/Documentation/userspace-api/media/cec/cec-func-close.rst b/Documentation/userspace-api/media/cec/cec-func-close.rst
new file mode 100644
index 000000000..409e70a5f
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-func-close.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _cec-func-close:
+
+***********
+cec close()
+***********
+
+Name
+====
+
+cec-close - Close a cec device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: int close( int fd )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+Description
+===========
+
+Closes the cec device. Resources associated with the file descriptor are
+freed. The device configuration remain unchanged.
+
+Return Value
+============
+
+:c:func:`close()` returns 0 on success. On error, -1 is returned, and
+``errno`` is set appropriately. Possible error codes are:
+
+``EBADF``
+    ``fd`` is not a valid open file descriptor.
diff --git a/Documentation/userspace-api/media/cec/cec-func-ioctl.rst b/Documentation/userspace-api/media/cec/cec-func-ioctl.rst
new file mode 100644
index 000000000..7c93f86de
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-func-ioctl.rst
@@ -0,0 +1,63 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _cec-func-ioctl:
+
+***********
+cec ioctl()
+***********
+
+Name
+====
+
+cec-ioctl - Control a cec device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/ioctl.h>
+
+``int ioctl(int fd, int request, void *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``request``
+    CEC ioctl request code as defined in the cec.h header file, for
+    example :ref:`CEC_ADAP_G_CAPS <CEC_ADAP_G_CAPS>`.
+
+``argp``
+    Pointer to a request-specific structure.
+
+Description
+===========
+
+The :c:func:`ioctl()` function manipulates cec device parameters. The
+argument ``fd`` must be an open file descriptor.
+
+The ioctl ``request`` code specifies the cec function to be called. It
+has encoded in it whether the argument is an input, output or read/write
+parameter, and the size of the argument ``argp`` in bytes.
+
+Macros and structures definitions specifying cec ioctl requests and
+their parameters are located in the cec.h header file. All cec ioctl
+requests, their respective function and parameters are specified in
+:ref:`cec-user-func`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+Request-specific error codes are listed in the individual requests
+descriptions.
+
+When an ioctl that takes an output or read/write parameter fails, the
+parameter remains unmodified.
diff --git a/Documentation/userspace-api/media/cec/cec-func-open.rst b/Documentation/userspace-api/media/cec/cec-func-open.rst
new file mode 100644
index 000000000..d86563a34
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-func-open.rst
@@ -0,0 +1,74 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _cec-func-open:
+
+**********
+cec open()
+**********
+
+Name
+====
+
+cec-open - Open a cec device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <fcntl.h>
+
+.. c:function:: int open( const char *device_name, int flags )
+
+Arguments
+=========
+
+``device_name``
+    Device to be opened.
+
+``flags``
+    Open flags. Access mode must be ``O_RDWR``.
+
+    When the ``O_NONBLOCK`` flag is given, the
+    :ref:`CEC_RECEIVE <CEC_RECEIVE>` and :ref:`CEC_DQEVENT <CEC_DQEVENT>` ioctls
+    will return the ``EAGAIN`` error code when no message or event is available, and
+    ioctls :ref:`CEC_TRANSMIT <CEC_TRANSMIT>`,
+    :ref:`CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` and
+    :ref:`CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+    all return 0.
+
+    Other flags have no effect.
+
+Description
+===========
+
+To open a cec device applications call :c:func:`open()` with the
+desired device name. The function has no side effects; the device
+configuration remain unchanged.
+
+When the device is opened in read-only mode, attempts to modify its
+configuration will result in an error, and ``errno`` will be set to
+EBADF.
+
+Return Value
+============
+
+:c:func:`open()` returns the new file descriptor on success. On error,
+-1 is returned, and ``errno`` is set appropriately. Possible error codes
+include:
+
+``EACCES``
+    The requested access to the file is not allowed.
+
+``EMFILE``
+    The process already has the maximum number of files open.
+
+``ENFILE``
+    The system limit on the total number of open files has been reached.
+
+``ENOMEM``
+    Insufficient kernel memory was available.
+
+``ENXIO``
+    No device corresponding to this device special file exists.
diff --git a/Documentation/userspace-api/media/cec/cec-func-poll.rst b/Documentation/userspace-api/media/cec/cec-func-poll.rst
new file mode 100644
index 000000000..980bbfc0b
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-func-poll.rst
@@ -0,0 +1,74 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _cec-func-poll:
+
+**********
+cec poll()
+**********
+
+Name
+====
+
+cec-poll - Wait for some event on a file descriptor
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/poll.h>
+
+.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
+
+Arguments
+=========
+
+``ufds``
+   List of FD events to be watched
+
+``nfds``
+   Number of FD events at the \*ufds array
+
+``timeout``
+   Timeout to wait for events
+
+Description
+===========
+
+With the :c:func:`poll()` function applications can wait for CEC
+events.
+
+On success :c:func:`poll()` returns the number of file descriptors
+that have been selected (that is, file descriptors for which the
+``revents`` field of the respective struct :c:type:`pollfd`
+is non-zero). CEC devices set the ``POLLIN`` and ``POLLRDNORM`` flags in
+the ``revents`` field if there are messages in the receive queue. If the
+transmit queue has room for new messages, the ``POLLOUT`` and
+``POLLWRNORM`` flags are set. If there are events in the event queue,
+then the ``POLLPRI`` flag is set. When the function times out it returns
+a value of zero, on failure it returns -1 and the ``errno`` variable is
+set appropriately.
+
+For more details see the :c:func:`poll()` manual page.
+
+Return Value
+============
+
+On success, :c:func:`poll()` returns the number structures which have
+non-zero ``revents`` fields, or zero if the call timed out. On error -1
+is returned, and the ``errno`` variable is set appropriately:
+
+``EBADF``
+    One or more of the ``ufds`` members specify an invalid file
+    descriptor.
+
+``EFAULT``
+    ``ufds`` references an inaccessible memory area.
+
+``EINTR``
+    The call was interrupted by a signal.
+
+``EINVAL``
+    The ``nfds`` value exceeds the ``RLIMIT_NOFILE`` value. Use
+    ``getrlimit()`` to obtain this value.
diff --git a/Documentation/userspace-api/media/cec/cec-funcs.rst b/Documentation/userspace-api/media/cec/cec-funcs.rst
new file mode 100644
index 000000000..aa6b790e8
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-funcs.rst
@@ -0,0 +1,23 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _cec-user-func:
+
+******************
+Function Reference
+******************
+
+
+.. toctree::
+    :maxdepth: 1
+
+    cec-func-open
+    cec-func-close
+    cec-func-ioctl
+    cec-func-poll
+    cec-ioc-adap-g-caps
+    cec-ioc-adap-g-log-addrs
+    cec-ioc-adap-g-phys-addr
+    cec-ioc-adap-g-conn-info
+    cec-ioc-dqevent
+    cec-ioc-g-mode
+    cec-ioc-receive
diff --git a/Documentation/userspace-api/media/cec/cec-header.rst b/Documentation/userspace-api/media/cec/cec-header.rst
new file mode 100644
index 000000000..d70736ac2
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-header.rst
@@ -0,0 +1,10 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _cec_header:
+
+***************
+CEC Header File
+***************
+
+.. kernel-include:: $BUILDDIR/cec.h.rst
+
diff --git a/Documentation/userspace-api/media/cec/cec-intro.rst b/Documentation/userspace-api/media/cec/cec-intro.rst
new file mode 100644
index 000000000..1884ea090
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-intro.rst
@@ -0,0 +1,42 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _cec-intro:
+
+Introduction
+============
+
+HDMI connectors provide a single pin for use by the Consumer Electronics
+Control protocol. This protocol allows different devices connected by an
+HDMI cable to communicate. The protocol for CEC version 1.4 is defined
+in supplements 1 (CEC) and 2 (HEAC or HDMI Ethernet and Audio Return
+Channel) of the HDMI 1.4a (:ref:`hdmi`) specification and the
+extensions added to CEC version 2.0 are defined in chapter 11 of the
+HDMI 2.0 (:ref:`hdmi2`) specification.
+
+The bitrate is very slow (effectively no more than 36 bytes per second)
+and is based on the ancient AV.link protocol used in old SCART
+connectors. The protocol closely resembles a crazy Rube Goldberg
+contraption and is an unholy mix of low and high level messages. Some
+messages, especially those part of the HEAC protocol layered on top of
+CEC, need to be handled by the kernel, others can be handled either by
+the kernel or by userspace.
+
+In addition, CEC can be implemented in HDMI receivers, transmitters and
+in USB devices that have an HDMI input and an HDMI output and that
+control just the CEC pin.
+
+Drivers that support CEC will create a CEC device node (/dev/cecX) to
+give userspace access to the CEC adapter. The
+:ref:`CEC_ADAP_G_CAPS` ioctl will tell userspace what it is allowed to do.
+
+In order to check the support and test it, it is suggested to download
+the `v4l-utils <https://git.linuxtv.org/v4l-utils.git/>`_ package. It
+provides three tools to handle CEC:
+
+- cec-ctl: the Swiss army knife of CEC. Allows you to configure, transmit
+  and monitor CEC messages.
+
+- cec-compliance: does a CEC compliance test of a remote CEC device to
+  determine how compliant the CEC implementation is.
+
+- cec-follower: emulates a CEC follower.
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst
new file mode 100644
index 000000000..c7309a2fc
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst
@@ -0,0 +1,146 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _CEC_ADAP_G_CAPS:
+
+*********************
+ioctl CEC_ADAP_G_CAPS
+*********************
+
+Name
+====
+
+CEC_ADAP_G_CAPS - Query device capabilities
+
+Synopsis
+========
+
+.. c:macro:: CEC_ADAP_G_CAPS
+
+``int ioctl(int fd, CEC_ADAP_G_CAPS, struct cec_caps *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+
+Description
+===========
+
+All cec devices must support :ref:`ioctl CEC_ADAP_G_CAPS <CEC_ADAP_G_CAPS>`. To query
+device information, applications call the ioctl with a pointer to a
+struct :c:type:`cec_caps`. The driver fills the structure and
+returns the information to the application. The ioctl never fails.
+
+.. tabularcolumns:: |p{1.2cm}|p{2.5cm}|p{13.8cm}|
+
+.. c:type:: cec_caps
+
+.. flat-table:: struct cec_caps
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+    * - char
+      - ``driver[32]``
+      - The name of the cec adapter driver.
+    * - char
+      - ``name[32]``
+      - The name of this CEC adapter. The combination ``driver`` and
+	``name`` must be unique.
+    * - __u32
+      - ``available_log_addrs``
+      - The maximum number of logical addresses that can be configured.
+    * - __u32
+      - ``capabilities``
+      - The capabilities of the CEC adapter, see
+	:ref:`cec-capabilities`.
+    * - __u32
+      - ``version``
+      - CEC Framework API version, formatted with the ``KERNEL_VERSION()``
+	macro.
+
+.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
+
+.. _cec-capabilities:
+
+.. flat-table:: CEC Capabilities Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 8
+
+    * .. _`CEC-CAP-PHYS-ADDR`:
+
+      - ``CEC_CAP_PHYS_ADDR``
+      - 0x00000001
+      - Userspace has to configure the physical address by calling
+	:ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`. If
+	this capability isn't set, then setting the physical address is
+	handled by the kernel whenever the EDID is set (for an HDMI
+	receiver) or read (for an HDMI transmitter).
+    * .. _`CEC-CAP-LOG-ADDRS`:
+
+      - ``CEC_CAP_LOG_ADDRS``
+      - 0x00000002
+      - Userspace has to configure the logical addresses by calling
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`. If
+	this capability isn't set, then the kernel will have configured
+	this.
+    * .. _`CEC-CAP-TRANSMIT`:
+
+      - ``CEC_CAP_TRANSMIT``
+      - 0x00000004
+      - Userspace can transmit CEC messages by calling
+	:ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. This implies that
+	userspace can be a follower as well, since being able to transmit
+	messages is a prerequisite of becoming a follower. If this
+	capability isn't set, then the kernel will handle all CEC
+	transmits and process all CEC messages it receives.
+    * .. _`CEC-CAP-PASSTHROUGH`:
+
+      - ``CEC_CAP_PASSTHROUGH``
+      - 0x00000008
+      - Userspace can use the passthrough mode by calling
+	:ref:`ioctl CEC_S_MODE <CEC_S_MODE>`.
+    * .. _`CEC-CAP-RC`:
+
+      - ``CEC_CAP_RC``
+      - 0x00000010
+      - This adapter supports the remote control protocol.
+    * .. _`CEC-CAP-MONITOR-ALL`:
+
+      - ``CEC_CAP_MONITOR_ALL``
+      - 0x00000020
+      - The CEC hardware can monitor all messages, not just directed and
+	broadcast messages.
+    * .. _`CEC-CAP-NEEDS-HPD`:
+
+      - ``CEC_CAP_NEEDS_HPD``
+      - 0x00000040
+      - The CEC hardware is only active if the HDMI Hotplug Detect pin is
+        high. This makes it impossible to use CEC to wake up displays that
+	set the HPD pin low when in standby mode, but keep the CEC bus
+	alive.
+    * .. _`CEC-CAP-MONITOR-PIN`:
+
+      - ``CEC_CAP_MONITOR_PIN``
+      - 0x00000080
+      - The CEC hardware can monitor CEC pin changes from low to high voltage
+        and vice versa. When in pin monitoring mode the application will
+	receive ``CEC_EVENT_PIN_CEC_LOW`` and ``CEC_EVENT_PIN_CEC_HIGH`` events.
+    * .. _`CEC-CAP-CONNECTOR-INFO`:
+
+      - ``CEC_CAP_CONNECTOR_INFO``
+      - 0x00000100
+      - If this capability is set, then :ref:`CEC_ADAP_G_CONNECTOR_INFO` can
+        be used.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-conn-info.rst b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-conn-info.rst
new file mode 100644
index 000000000..13116b0b5
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-conn-info.rst
@@ -0,0 +1,106 @@
+.. SPDX-License-Identifier: GPL-2.0
+..
+.. Copyright 2019 Google LLC
+..
+.. c:namespace:: CEC
+
+.. _CEC_ADAP_G_CONNECTOR_INFO:
+
+*******************************
+ioctl CEC_ADAP_G_CONNECTOR_INFO
+*******************************
+
+Name
+====
+
+CEC_ADAP_G_CONNECTOR_INFO - Query HDMI connector information
+
+Synopsis
+========
+
+.. c:macro:: CEC_ADAP_G_CONNECTOR_INFO
+
+``int ioctl(int fd, CEC_ADAP_G_CONNECTOR_INFO, struct cec_connector_info *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+
+Description
+===========
+
+Using this ioctl an application can learn which HDMI connector this CEC
+device corresponds to. While calling this ioctl the application should
+provide a pointer to a cec_connector_info struct which will be populated
+by the kernel with the info provided by the adapter's driver. This ioctl
+is only available if the ``CEC_CAP_CONNECTOR_INFO`` capability is set.
+
+.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}|
+
+.. c:type:: cec_connector_info
+
+.. flat-table:: struct cec_connector_info
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 8
+
+    * - __u32
+      - ``type``
+      - The type of connector this adapter is associated with.
+    * - union {
+      - ``(anonymous)``
+    * - ``struct cec_drm_connector_info``
+      - drm
+      - :ref:`cec-drm-connector-info`
+    * - }
+      -
+
+.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
+
+.. _connector-type:
+
+.. flat-table:: Connector types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 8
+
+    * .. _`CEC-CONNECTOR-TYPE-NO-CONNECTOR`:
+
+      - ``CEC_CONNECTOR_TYPE_NO_CONNECTOR``
+      - 0
+      - No connector is associated with the adapter/the information is not
+        provided by the driver.
+    * .. _`CEC-CONNECTOR-TYPE-DRM`:
+
+      - ``CEC_CONNECTOR_TYPE_DRM``
+      - 1
+      - Indicates that a DRM connector is associated with this adapter.
+        Information about the connector can be found in
+	:ref:`cec-drm-connector-info`.
+
+.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
+
+.. c:type:: cec_drm_connector_info
+
+.. _cec-drm-connector-info:
+
+.. flat-table:: struct cec_drm_connector_info
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 8
+
+    * .. _`CEC-DRM-CONNECTOR-TYPE-CARD-NO`:
+
+      - __u32
+      - ``card_no``
+      - DRM card number: the number from a card's path, e.g. 0 in case of
+        /dev/card0.
+    * .. _`CEC-DRM-CONNECTOR-TYPE-CONNECTOR_ID`:
+
+      - __u32
+      - ``connector_id``
+      - DRM connector ID.
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-log-addrs.rst b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-log-addrs.rst
new file mode 100644
index 000000000..c760c07b6
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-log-addrs.rst
@@ -0,0 +1,367 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _CEC_ADAP_LOG_ADDRS:
+.. _CEC_ADAP_G_LOG_ADDRS:
+.. _CEC_ADAP_S_LOG_ADDRS:
+
+****************************************************
+ioctls CEC_ADAP_G_LOG_ADDRS and CEC_ADAP_S_LOG_ADDRS
+****************************************************
+
+Name
+====
+
+CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS - Get or set the logical addresses
+
+Synopsis
+========
+
+.. c:macro:: CEC_ADAP_G_LOG_ADDRS
+
+``int ioctl(int fd, CEC_ADAP_G_LOG_ADDRS, struct cec_log_addrs *argp)``
+
+.. c:macro:: CEC_ADAP_S_LOG_ADDRS
+
+``int ioctl(int fd, CEC_ADAP_S_LOG_ADDRS, struct cec_log_addrs *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`cec_log_addrs`.
+
+Description
+===========
+
+To query the current CEC logical addresses, applications call
+:ref:`ioctl CEC_ADAP_G_LOG_ADDRS <CEC_ADAP_G_LOG_ADDRS>` with a pointer to a
+struct :c:type:`cec_log_addrs` where the driver stores the logical addresses.
+
+To set new logical addresses, applications fill in
+struct :c:type:`cec_log_addrs` and call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+with a pointer to this struct. The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+is only available if ``CEC_CAP_LOG_ADDRS`` is set (the ``ENOTTY`` error code is
+returned otherwise). The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+can only be called by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not
+the ``EBUSY`` error code will be returned.
+
+To clear existing logical addresses set ``num_log_addrs`` to 0. All other fields
+will be ignored in that case. The adapter will go to the unconfigured state and the
+``cec_version``, ``vendor_id`` and ``osd_name`` fields are all reset to their default
+values (CEC version 2.0, no vendor ID and an empty OSD name).
+
+If the physical address is valid (see :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`),
+then this ioctl will block until all requested logical
+addresses have been claimed. If the file descriptor is in non-blocking mode then it will
+not wait for the logical addresses to be claimed, instead it just returns 0.
+
+A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the
+logical addresses are claimed or cleared.
+
+Attempting to call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` when
+logical address types are already defined will return with error ``EBUSY``.
+
+.. c:type:: cec_log_addrs
+
+.. tabularcolumns:: |p{1.0cm}|p{8.0cm}|p{7.5cm}|
+
+.. cssclass:: longtable
+
+.. flat-table:: struct cec_log_addrs
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+    * - __u8
+      - ``log_addr[CEC_MAX_LOG_ADDRS]``
+      - The actual logical addresses that were claimed. This is set by the
+	driver. If no logical address could be claimed, then it is set to
+	``CEC_LOG_ADDR_INVALID``. If this adapter is Unregistered, then
+	``log_addr[0]`` is set to 0xf and all others to
+	``CEC_LOG_ADDR_INVALID``.
+    * - __u16
+      - ``log_addr_mask``
+      - The bitmask of all logical addresses this adapter has claimed. If
+	this adapter is Unregistered then ``log_addr_mask`` sets bit 15
+	and clears all other bits. If this adapter is not configured at
+	all, then ``log_addr_mask`` is set to 0. Set by the driver.
+    * - __u8
+      - ``cec_version``
+      - The CEC version that this adapter shall use. See
+	:ref:`cec-versions`. Used to implement the
+	``CEC_MSG_CEC_VERSION`` and ``CEC_MSG_REPORT_FEATURES`` messages.
+	Note that :ref:`CEC_OP_CEC_VERSION_1_3A <CEC-OP-CEC-VERSION-1-3A>` is not allowed by the CEC
+	framework.
+    * - __u8
+      - ``num_log_addrs``
+      - Number of logical addresses to set up. Must be ≤
+	``available_log_addrs`` as returned by
+	:ref:`CEC_ADAP_G_CAPS`. All arrays in
+	this structure are only filled up to index
+	``available_log_addrs``-1. The remaining array elements will be
+	ignored. Note that the CEC 2.0 standard allows for a maximum of 2
+	logical addresses, although some hardware has support for more.
+	``CEC_MAX_LOG_ADDRS`` is 4. The driver will return the actual
+	number of logical addresses it could claim, which may be less than
+	what was requested. If this field is set to 0, then the CEC
+	adapter shall clear all claimed logical addresses and all other
+	fields will be ignored.
+    * - __u32
+      - ``vendor_id``
+      - The vendor ID is a 24-bit number that identifies the specific
+	vendor or entity. Based on this ID vendor specific commands may be
+	defined. If you do not want a vendor ID then set it to
+	``CEC_VENDOR_ID_NONE``.
+    * - __u32
+      - ``flags``
+      - Flags. See :ref:`cec-log-addrs-flags` for a list of available flags.
+    * - char
+      - ``osd_name[15]``
+      - The On-Screen Display name as is returned by the
+	``CEC_MSG_SET_OSD_NAME`` message.
+    * - __u8
+      - ``primary_device_type[CEC_MAX_LOG_ADDRS]``
+      - Primary device type for each logical address. See
+	:ref:`cec-prim-dev-types` for possible types.
+    * - __u8
+      - ``log_addr_type[CEC_MAX_LOG_ADDRS]``
+      - Logical address types. See :ref:`cec-log-addr-types` for
+	possible types. The driver will update this with the actual
+	logical address type that it claimed (e.g. it may have to fallback
+	to :ref:`CEC_LOG_ADDR_TYPE_UNREGISTERED <CEC-LOG-ADDR-TYPE-UNREGISTERED>`).
+    * - __u8
+      - ``all_device_types[CEC_MAX_LOG_ADDRS]``
+      - CEC 2.0 specific: the bit mask of all device types. See
+	:ref:`cec-all-dev-types-flags`. It is used in the CEC 2.0
+	``CEC_MSG_REPORT_FEATURES`` message. For CEC 1.4 you can either leave
+	this field to 0, or fill it in according to the CEC 2.0 guidelines to
+	give the CEC framework more information about the device type, even
+	though the framework won't use it directly in the CEC message.
+    * - __u8
+      - ``features[CEC_MAX_LOG_ADDRS][12]``
+      - Features for each logical address. It is used in the CEC 2.0
+	``CEC_MSG_REPORT_FEATURES`` message. The 12 bytes include both the
+	RC Profile and the Device Features. For CEC 1.4 you can either leave
+        this field to all 0, or fill it in according to the CEC 2.0 guidelines to
+        give the CEC framework more information about the device type, even
+        though the framework won't use it directly in the CEC message.
+
+.. tabularcolumns:: |p{7.8cm}|p{1.0cm}|p{8.7cm}|
+
+.. _cec-log-addrs-flags:
+
+.. flat-table:: Flags for struct cec_log_addrs
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-LOG-ADDRS-FL-ALLOW-UNREG-FALLBACK`:
+
+      - ``CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK``
+      - 1
+      - By default if no logical address of the requested type can be claimed, then
+	it will go back to the unconfigured state. If this flag is set, then it will
+	fallback to the Unregistered logical address. Note that if the Unregistered
+	logical address was explicitly requested, then this flag has no effect.
+    * .. _`CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU`:
+
+      - ``CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU``
+      - 2
+      - By default the ``CEC_MSG_USER_CONTROL_PRESSED`` and ``CEC_MSG_USER_CONTROL_RELEASED``
+        messages are only passed on to the follower(s), if any. If this flag is set,
+	then these messages are also passed on to the remote control input subsystem
+	and will appear as keystrokes. This features needs to be enabled explicitly.
+	If CEC is used to enter e.g. passwords, then you may not want to enable this
+	to avoid trivial snooping of the keystrokes.
+    * .. _`CEC-LOG-ADDRS-FL-CDC-ONLY`:
+
+      - ``CEC_LOG_ADDRS_FL_CDC_ONLY``
+      - 4
+      - If this flag is set, then the device is CDC-Only. CDC-Only CEC devices
+	are CEC devices that can only handle CDC messages.
+
+	All other messages are ignored.
+
+.. tabularcolumns:: |p{7.8cm}|p{1.0cm}|p{8.7cm}|
+
+.. _cec-versions:
+
+.. flat-table:: CEC Versions
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-OP-CEC-VERSION-1-3A`:
+
+      - ``CEC_OP_CEC_VERSION_1_3A``
+      - 4
+      - CEC version according to the HDMI 1.3a standard.
+    * .. _`CEC-OP-CEC-VERSION-1-4B`:
+
+      - ``CEC_OP_CEC_VERSION_1_4B``
+      - 5
+      - CEC version according to the HDMI 1.4b standard.
+    * .. _`CEC-OP-CEC-VERSION-2-0`:
+
+      - ``CEC_OP_CEC_VERSION_2_0``
+      - 6
+      - CEC version according to the HDMI 2.0 standard.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _cec-prim-dev-types:
+
+.. flat-table:: CEC Primary Device Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-OP-PRIM-DEVTYPE-TV`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_TV``
+      - 0
+      - Use for a TV.
+    * .. _`CEC-OP-PRIM-DEVTYPE-RECORD`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_RECORD``
+      - 1
+      - Use for a recording device.
+    * .. _`CEC-OP-PRIM-DEVTYPE-TUNER`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_TUNER``
+      - 3
+      - Use for a device with a tuner.
+    * .. _`CEC-OP-PRIM-DEVTYPE-PLAYBACK`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_PLAYBACK``
+      - 4
+      - Use for a playback device.
+    * .. _`CEC-OP-PRIM-DEVTYPE-AUDIOSYSTEM`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM``
+      - 5
+      - Use for an audio system (e.g. an audio/video receiver).
+    * .. _`CEC-OP-PRIM-DEVTYPE-SWITCH`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_SWITCH``
+      - 6
+      - Use for a CEC switch.
+    * .. _`CEC-OP-PRIM-DEVTYPE-VIDEOPROC`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_VIDEOPROC``
+      - 7
+      - Use for a video processor device.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _cec-log-addr-types:
+
+.. flat-table:: CEC Logical Address Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-LOG-ADDR-TYPE-TV`:
+
+      - ``CEC_LOG_ADDR_TYPE_TV``
+      - 0
+      - Use for a TV.
+    * .. _`CEC-LOG-ADDR-TYPE-RECORD`:
+
+      - ``CEC_LOG_ADDR_TYPE_RECORD``
+      - 1
+      - Use for a recording device.
+    * .. _`CEC-LOG-ADDR-TYPE-TUNER`:
+
+      - ``CEC_LOG_ADDR_TYPE_TUNER``
+      - 2
+      - Use for a tuner device.
+    * .. _`CEC-LOG-ADDR-TYPE-PLAYBACK`:
+
+      - ``CEC_LOG_ADDR_TYPE_PLAYBACK``
+      - 3
+      - Use for a playback device.
+    * .. _`CEC-LOG-ADDR-TYPE-AUDIOSYSTEM`:
+
+      - ``CEC_LOG_ADDR_TYPE_AUDIOSYSTEM``
+      - 4
+      - Use for an audio system device.
+    * .. _`CEC-LOG-ADDR-TYPE-SPECIFIC`:
+
+      - ``CEC_LOG_ADDR_TYPE_SPECIFIC``
+      - 5
+      - Use for a second TV or for a video processor device.
+    * .. _`CEC-LOG-ADDR-TYPE-UNREGISTERED`:
+
+      - ``CEC_LOG_ADDR_TYPE_UNREGISTERED``
+      - 6
+      - Use this if you just want to remain unregistered. Used for pure
+	CEC switches or CDC-only devices (CDC: Capability Discovery and
+	Control).
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _cec-all-dev-types-flags:
+
+.. flat-table:: CEC All Device Types Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-OP-ALL-DEVTYPE-TV`:
+
+      - ``CEC_OP_ALL_DEVTYPE_TV``
+      - 0x80
+      - This supports the TV type.
+    * .. _`CEC-OP-ALL-DEVTYPE-RECORD`:
+
+      - ``CEC_OP_ALL_DEVTYPE_RECORD``
+      - 0x40
+      - This supports the Recording type.
+    * .. _`CEC-OP-ALL-DEVTYPE-TUNER`:
+
+      - ``CEC_OP_ALL_DEVTYPE_TUNER``
+      - 0x20
+      - This supports the Tuner type.
+    * .. _`CEC-OP-ALL-DEVTYPE-PLAYBACK`:
+
+      - ``CEC_OP_ALL_DEVTYPE_PLAYBACK``
+      - 0x10
+      - This supports the Playback type.
+    * .. _`CEC-OP-ALL-DEVTYPE-AUDIOSYSTEM`:
+
+      - ``CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM``
+      - 0x08
+      - This supports the Audio System type.
+    * .. _`CEC-OP-ALL-DEVTYPE-SWITCH`:
+
+      - ``CEC_OP_ALL_DEVTYPE_SWITCH``
+      - 0x04
+      - This supports the CEC Switch or Video Processing type.
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` can return the following
+error codes:
+
+ENOTTY
+    The ``CEC_CAP_LOG_ADDRS`` capability wasn't set, so this ioctl is not supported.
+
+EBUSY
+    The CEC adapter is currently configuring itself, or it is already configured and
+    ``num_log_addrs`` is non-zero, or another filehandle is in exclusive follower or
+    initiator mode, or the filehandle is in mode ``CEC_MODE_NO_INITIATOR``.
+
+EINVAL
+    The contents of struct :c:type:`cec_log_addrs` is invalid.
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-phys-addr.rst b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-phys-addr.rst
new file mode 100644
index 000000000..fb22f6894
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-phys-addr.rst
@@ -0,0 +1,94 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _CEC_ADAP_PHYS_ADDR:
+.. _CEC_ADAP_G_PHYS_ADDR:
+.. _CEC_ADAP_S_PHYS_ADDR:
+
+****************************************************
+ioctls CEC_ADAP_G_PHYS_ADDR and CEC_ADAP_S_PHYS_ADDR
+****************************************************
+
+Name
+====
+
+CEC_ADAP_G_PHYS_ADDR, CEC_ADAP_S_PHYS_ADDR - Get or set the physical address
+
+Synopsis
+========
+
+.. c:macro:: CEC_ADAP_G_PHYS_ADDR
+
+``int ioctl(int fd, CEC_ADAP_G_PHYS_ADDR, __u16 *argp)``
+
+.. c:macro:: CEC_ADAP_S_PHYS_ADDR
+
+``int ioctl(int fd, CEC_ADAP_S_PHYS_ADDR, __u16 *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to the CEC address.
+
+Description
+===========
+
+To query the current physical address applications call
+:ref:`ioctl CEC_ADAP_G_PHYS_ADDR <CEC_ADAP_G_PHYS_ADDR>` with a pointer to a __u16 where the
+driver stores the physical address.
+
+To set a new physical address applications store the physical address in
+a __u16 and call :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` with a pointer to
+this integer. The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` is only available if
+``CEC_CAP_PHYS_ADDR`` is set (the ``ENOTTY`` error code will be returned
+otherwise). The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can only be called
+by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not
+the ``EBUSY`` error code will be returned.
+
+To clear an existing physical address use ``CEC_PHYS_ADDR_INVALID``.
+The adapter will go to the unconfigured state.
+
+If logical address types have been defined (see :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`),
+then this ioctl will block until all
+requested logical addresses have been claimed. If the file descriptor is in non-blocking mode
+then it will not wait for the logical addresses to be claimed, instead it just returns 0.
+
+A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the physical address
+changes.
+
+The physical address is a 16-bit number where each group of 4 bits
+represent a digit of the physical address a.b.c.d where the most
+significant 4 bits represent 'a'. The CEC root device (usually the TV)
+has address 0.0.0.0. Every device that is hooked up to an input of the
+TV has address a.0.0.0 (where 'a' is ≥ 1), devices hooked up to those in
+turn have addresses a.b.0.0, etc. So a topology of up to 5 devices deep
+is supported. The physical address a device shall use is stored in the
+EDID of the sink.
+
+For example, the EDID for each HDMI input of the TV will have a
+different physical address of the form a.0.0.0 that the sources will
+read out and use as their physical address.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can return the following
+error codes:
+
+ENOTTY
+    The ``CEC_CAP_PHYS_ADDR`` capability wasn't set, so this ioctl is not supported.
+
+EBUSY
+    Another filehandle is in exclusive follower or initiator mode, or the filehandle
+    is in mode ``CEC_MODE_NO_INITIATOR``.
+
+EINVAL
+    The physical address is malformed.
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-dqevent.rst b/Documentation/userspace-api/media/cec/cec-ioc-dqevent.rst
new file mode 100644
index 000000000..736fda5ad
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-ioc-dqevent.rst
@@ -0,0 +1,245 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _CEC_DQEVENT:
+
+*****************
+ioctl CEC_DQEVENT
+*****************
+
+Name
+====
+
+CEC_DQEVENT - Dequeue a CEC event
+
+Synopsis
+========
+
+.. c:macro:: CEC_DQEVENT
+
+``int ioctl(int fd, CEC_DQEVENT, struct cec_event *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+
+Description
+===========
+
+CEC devices can send asynchronous events. These can be retrieved by
+calling :c:func:`CEC_DQEVENT`. If the file descriptor is in
+non-blocking mode and no event is pending, then it will return -1 and
+set errno to the ``EAGAIN`` error code.
+
+The internal event queues are per-filehandle and per-event type. If
+there is no more room in a queue then the last event is overwritten with
+the new one. This means that intermediate results can be thrown away but
+that the latest event is always available. This also means that is it
+possible to read two successive events that have the same value (e.g.
+two :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` events with
+the same state). In that case the intermediate state changes were lost but
+it is guaranteed that the state did change in between the two events.
+
+.. tabularcolumns:: |p{1.2cm}|p{2.9cm}|p{13.4cm}|
+
+.. c:type:: cec_event_state_change
+
+.. flat-table:: struct cec_event_state_change
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 8
+
+    * - __u16
+      - ``phys_addr``
+      - The current physical address. This is ``CEC_PHYS_ADDR_INVALID`` if no
+        valid physical address is set.
+    * - __u16
+      - ``log_addr_mask``
+      - The current set of claimed logical addresses. This is 0 if no logical
+        addresses are claimed or if ``phys_addr`` is ``CEC_PHYS_ADDR_INVALID``.
+	If bit 15 is set (``1 << CEC_LOG_ADDR_UNREGISTERED``) then this device
+	has the unregistered logical address. In that case all other bits are 0.
+    * - __u16
+      - ``have_conn_info``
+      - If non-zero, then HDMI connector information is available.
+        This field is only valid if ``CEC_CAP_CONNECTOR_INFO`` is set. If that
+        capability is set and ``have_conn_info`` is zero, then that indicates
+        that the HDMI connector device is not instantiated, either because
+        the HDMI driver is still configuring the device or because the HDMI
+        device was unbound.
+
+.. c:type:: cec_event_lost_msgs
+
+.. tabularcolumns:: |p{1.0cm}|p{2.0cm}|p{14.5cm}|
+
+.. flat-table:: struct cec_event_lost_msgs
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+    * - __u32
+      - ``lost_msgs``
+      - Set to the number of lost messages since the filehandle was opened
+	or since the last time this event was dequeued for this
+	filehandle. The messages lost are the oldest messages. So when a
+	new message arrives and there is no more room, then the oldest
+	message is discarded to make room for the new one. The internal
+	size of the message queue guarantees that all messages received in
+	the last two seconds will be stored. Since messages should be
+	replied to within a second according to the CEC specification,
+	this is more than enough.
+
+.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}|
+
+.. c:type:: cec_event
+
+.. flat-table:: struct cec_event
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 8
+
+    * - __u64
+      - ``ts``
+      - Timestamp of the event in ns.
+
+	The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock.
+
+	To access the same clock from userspace use :c:func:`clock_gettime`.
+    * - __u32
+      - ``event``
+      - The CEC event type, see :ref:`cec-events`.
+    * - __u32
+      - ``flags``
+      - Event flags, see :ref:`cec-event-flags`.
+    * - union {
+      - (anonymous)
+    * - struct cec_event_state_change
+      - ``state_change``
+      - The new adapter state as sent by the :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>`
+	event.
+    * - struct cec_event_lost_msgs
+      - ``lost_msgs``
+      - The number of lost messages as sent by the :ref:`CEC_EVENT_LOST_MSGS <CEC-EVENT-LOST-MSGS>`
+	event.
+    * - }
+      -
+
+.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
+
+.. _cec-events:
+
+.. flat-table:: CEC Events Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-EVENT-STATE-CHANGE`:
+
+      - ``CEC_EVENT_STATE_CHANGE``
+      - 1
+      - Generated when the CEC Adapter's state changes. When open() is
+	called an initial event will be generated for that filehandle with
+	the CEC Adapter's state at that time.
+    * .. _`CEC-EVENT-LOST-MSGS`:
+
+      - ``CEC_EVENT_LOST_MSGS``
+      - 2
+      - Generated if one or more CEC messages were lost because the
+	application didn't dequeue CEC messages fast enough.
+    * .. _`CEC-EVENT-PIN-CEC-LOW`:
+
+      - ``CEC_EVENT_PIN_CEC_LOW``
+      - 3
+      - Generated if the CEC pin goes from a high voltage to a low voltage.
+        Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set.
+    * .. _`CEC-EVENT-PIN-CEC-HIGH`:
+
+      - ``CEC_EVENT_PIN_CEC_HIGH``
+      - 4
+      - Generated if the CEC pin goes from a low voltage to a high voltage.
+        Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set.
+    * .. _`CEC-EVENT-PIN-HPD-LOW`:
+
+      - ``CEC_EVENT_PIN_HPD_LOW``
+      - 5
+      - Generated if the HPD pin goes from a high voltage to a low voltage.
+	Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set. When open() is called, the HPD pin can be read and
+	if the HPD is low, then an initial event will be generated for that
+	filehandle.
+    * .. _`CEC-EVENT-PIN-HPD-HIGH`:
+
+      - ``CEC_EVENT_PIN_HPD_HIGH``
+      - 6
+      - Generated if the HPD pin goes from a low voltage to a high voltage.
+	Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set. When open() is called, the HPD pin can be read and
+	if the HPD is high, then an initial event will be generated for that
+	filehandle.
+    * .. _`CEC-EVENT-PIN-5V-LOW`:
+
+      - ``CEC_EVENT_PIN_5V_LOW``
+      - 6
+      - Generated if the 5V pin goes from a high voltage to a low voltage.
+	Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set. When open() is called, the 5V pin can be read and
+	if the 5V is low, then an initial event will be generated for that
+	filehandle.
+    * .. _`CEC-EVENT-PIN-5V-HIGH`:
+
+      - ``CEC_EVENT_PIN_5V_HIGH``
+      - 7
+      - Generated if the 5V pin goes from a low voltage to a high voltage.
+	Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set. When open() is called, the 5V pin can be read and
+	if the 5V is high, then an initial event will be generated for that
+	filehandle.
+
+.. tabularcolumns:: |p{6.0cm}|p{0.6cm}|p{10.9cm}|
+
+.. _cec-event-flags:
+
+.. flat-table:: CEC Event Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 8
+
+    * .. _`CEC-EVENT-FL-INITIAL-STATE`:
+
+      - ``CEC_EVENT_FL_INITIAL_STATE``
+      - 1
+      - Set for the initial events that are generated when the device is
+	opened. See the table above for which events do this. This allows
+	applications to learn the initial state of the CEC adapter at
+	open() time.
+    * .. _`CEC-EVENT-FL-DROPPED-EVENTS`:
+
+      - ``CEC_EVENT_FL_DROPPED_EVENTS``
+      - 2
+      - Set if one or more events of the given event type have been dropped.
+        This is an indication that the application cannot keep up.
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_DQEVENT <CEC_DQEVENT>` can return the following
+error codes:
+
+EAGAIN
+    This is returned when the filehandle is in non-blocking mode and there
+    are no pending events.
+
+ERESTARTSYS
+    An interrupt (e.g. Ctrl-C) arrived while in blocking mode waiting for
+    events to arrive.
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-g-mode.rst b/Documentation/userspace-api/media/cec/cec-ioc-g-mode.rst
new file mode 100644
index 000000000..d3387b1fa
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-ioc-g-mode.rst
@@ -0,0 +1,294 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _CEC_MODE:
+.. _CEC_G_MODE:
+.. _CEC_S_MODE:
+
+********************************
+ioctls CEC_G_MODE and CEC_S_MODE
+********************************
+
+CEC_G_MODE, CEC_S_MODE - Get or set exclusive use of the CEC adapter
+
+Synopsis
+========
+
+.. c:macro:: CEC_G_MODE
+
+``int ioctl(int fd, CEC_G_MODE, __u32 *argp)``
+
+.. c:macro:: CEC_S_MODE
+
+``int ioctl(int fd, CEC_S_MODE, __u32 *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to CEC mode.
+
+Description
+===========
+
+By default any filehandle can use :ref:`CEC_TRANSMIT`, but in order to prevent
+applications from stepping on each others toes it must be possible to
+obtain exclusive access to the CEC adapter. This ioctl sets the
+filehandle to initiator and/or follower mode which can be exclusive
+depending on the chosen mode. The initiator is the filehandle that is
+used to initiate messages, i.e. it commands other CEC devices. The
+follower is the filehandle that receives messages sent to the CEC
+adapter and processes them. The same filehandle can be both initiator
+and follower, or this role can be taken by two different filehandles.
+
+When a CEC message is received, then the CEC framework will decide how
+it will be processed. If the message is a reply to an earlier
+transmitted message, then the reply is sent back to the filehandle that
+is waiting for it. In addition the CEC framework will process it.
+
+If the message is not a reply, then the CEC framework will process it
+first. If there is no follower, then the message is just discarded and a
+feature abort is sent back to the initiator if the framework couldn't
+process it. If there is a follower, then the message is passed on to the
+follower who will use :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` to dequeue
+the new message. The framework expects the follower to make the right
+decisions.
+
+The CEC framework will process core messages unless requested otherwise
+by the follower. The follower can enable the passthrough mode. In that
+case, the CEC framework will pass on most core messages without
+processing them and the follower will have to implement those messages.
+There are some messages that the core will always process, regardless of
+the passthrough mode. See :ref:`cec-core-processing` for details.
+
+If there is no initiator, then any CEC filehandle can use
+:ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. If there is an exclusive
+initiator then only that initiator can call
+:ref:`CEC_TRANSMIT`. The follower can of course
+always call :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`.
+
+Available initiator modes are:
+
+.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
+
+.. _cec-mode-initiator_e:
+
+.. flat-table:: Initiator Modes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-MODE-NO-INITIATOR`:
+
+      - ``CEC_MODE_NO_INITIATOR``
+      - 0x0
+      - This is not an initiator, i.e. it cannot transmit CEC messages or
+	make any other changes to the CEC adapter.
+    * .. _`CEC-MODE-INITIATOR`:
+
+      - ``CEC_MODE_INITIATOR``
+      - 0x1
+      - This is an initiator (the default when the device is opened) and
+	it can transmit CEC messages and make changes to the CEC adapter,
+	unless there is an exclusive initiator.
+    * .. _`CEC-MODE-EXCL-INITIATOR`:
+
+      - ``CEC_MODE_EXCL_INITIATOR``
+      - 0x2
+      - This is an exclusive initiator and this file descriptor is the
+	only one that can transmit CEC messages and make changes to the
+	CEC adapter. If someone else is already the exclusive initiator
+	then an attempt to become one will return the ``EBUSY`` error code
+	error.
+
+Available follower modes are:
+
+.. tabularcolumns:: |p{6.6cm}|p{0.9cm}|p{10.0cm}|
+
+.. _cec-mode-follower_e:
+
+.. cssclass:: longtable
+
+.. flat-table:: Follower Modes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-MODE-NO-FOLLOWER`:
+
+      - ``CEC_MODE_NO_FOLLOWER``
+      - 0x00
+      - This is not a follower (the default when the device is opened).
+    * .. _`CEC-MODE-FOLLOWER`:
+
+      - ``CEC_MODE_FOLLOWER``
+      - 0x10
+      - This is a follower and it will receive CEC messages unless there
+	is an exclusive follower. You cannot become a follower if
+	:ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>` is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`
+	was specified, the ``EINVAL`` error code is returned in that case.
+    * .. _`CEC-MODE-EXCL-FOLLOWER`:
+
+      - ``CEC_MODE_EXCL_FOLLOWER``
+      - 0x20
+      - This is an exclusive follower and only this file descriptor will
+	receive CEC messages for processing. If someone else is already
+	the exclusive follower then an attempt to become one will return
+	the ``EBUSY`` error code. You cannot become a follower if
+	:ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>` is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`
+	was specified, the ``EINVAL`` error code is returned in that case.
+    * .. _`CEC-MODE-EXCL-FOLLOWER-PASSTHRU`:
+
+      - ``CEC_MODE_EXCL_FOLLOWER_PASSTHRU``
+      - 0x30
+      - This is an exclusive follower and only this file descriptor will
+	receive CEC messages for processing. In addition it will put the
+	CEC device into passthrough mode, allowing the exclusive follower
+	to handle most core messages instead of relying on the CEC
+	framework for that. If someone else is already the exclusive
+	follower then an attempt to become one will return the ``EBUSY`` error
+	code. You cannot become a follower if :ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>`
+	is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>` was specified,
+	the ``EINVAL`` error code is returned in that case.
+    * .. _`CEC-MODE-MONITOR-PIN`:
+
+      - ``CEC_MODE_MONITOR_PIN``
+      - 0xd0
+      - Put the file descriptor into pin monitoring mode. Can only be used in
+	combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`,
+	otherwise the ``EINVAL`` error code will be returned.
+	This mode requires that the :ref:`CEC_CAP_MONITOR_PIN <CEC-CAP-MONITOR-PIN>`
+	capability is set, otherwise the ``EINVAL`` error code is returned.
+	While in pin monitoring mode this file descriptor can receive the
+	``CEC_EVENT_PIN_CEC_LOW`` and ``CEC_EVENT_PIN_CEC_HIGH`` events to see the
+	low-level CEC pin transitions. This is very useful for debugging.
+	This mode is only allowed if the process has the ``CAP_NET_ADMIN``
+	capability. If that is not set, then the ``EPERM`` error code is returned.
+    * .. _`CEC-MODE-MONITOR`:
+
+      - ``CEC_MODE_MONITOR``
+      - 0xe0
+      - Put the file descriptor into monitor mode. Can only be used in
+	combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`,
+	otherwise the ``EINVAL`` error code will be returned.
+	In monitor mode all messages this CEC
+	device transmits and all messages it receives (both broadcast
+	messages and directed messages for one its logical addresses) will
+	be reported. This is very useful for debugging. This is only
+	allowed if the process has the ``CAP_NET_ADMIN`` capability. If
+	that is not set, then the ``EPERM`` error code is returned.
+    * .. _`CEC-MODE-MONITOR-ALL`:
+
+      - ``CEC_MODE_MONITOR_ALL``
+      - 0xf0
+      - Put the file descriptor into 'monitor all' mode. Can only be used
+	in combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`, otherwise
+	the ``EINVAL`` error code will be returned. In 'monitor all' mode all messages
+	this CEC device transmits and all messages it receives, including
+	directed messages for other CEC devices will be reported. This is
+	very useful for debugging, but not all devices support this. This
+	mode requires that the :ref:`CEC_CAP_MONITOR_ALL <CEC-CAP-MONITOR-ALL>` capability is set,
+	otherwise the ``EINVAL`` error code is returned. This is only allowed if
+	the process has the ``CAP_NET_ADMIN`` capability. If that is not
+	set, then the ``EPERM`` error code is returned.
+
+Core message processing details:
+
+.. tabularcolumns:: |p{6.6cm}|p{10.9cm}|
+
+.. _cec-core-processing:
+
+.. flat-table:: Core Message Processing
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 8
+
+    * .. _`CEC-MSG-GET-CEC-VERSION`:
+
+      - ``CEC_MSG_GET_CEC_VERSION``
+      - The core will return the CEC version that was set with
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`,
+	except when in passthrough mode. In passthrough mode the core
+	does nothing and this message has to be handled by a follower
+	instead.
+    * .. _`CEC-MSG-GIVE-DEVICE-VENDOR-ID`:
+
+      - ``CEC_MSG_GIVE_DEVICE_VENDOR_ID``
+      - The core will return the vendor ID that was set with
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`,
+	except when in passthrough mode. In passthrough mode the core
+	does nothing and this message has to be handled by a follower
+	instead.
+    * .. _`CEC-MSG-ABORT`:
+
+      - ``CEC_MSG_ABORT``
+      - The core will return a Feature Abort message with reason
+        'Feature Refused' as per the specification, except when in
+	passthrough mode. In passthrough mode the core does nothing
+	and this message has to be handled by a follower instead.
+    * .. _`CEC-MSG-GIVE-PHYSICAL-ADDR`:
+
+      - ``CEC_MSG_GIVE_PHYSICAL_ADDR``
+      - The core will report the current physical address, except when
+        in passthrough mode. In passthrough mode the core does nothing
+	and this message has to be handled by a follower instead.
+    * .. _`CEC-MSG-GIVE-OSD-NAME`:
+
+      - ``CEC_MSG_GIVE_OSD_NAME``
+      - The core will report the current OSD name that was set with
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`,
+	except when in passthrough mode. In passthrough mode the core
+	does nothing and this message has to be handled by a follower
+	instead.
+    * .. _`CEC-MSG-GIVE-FEATURES`:
+
+      - ``CEC_MSG_GIVE_FEATURES``
+      - The core will do nothing if the CEC version is older than 2.0,
+        otherwise it will report the current features that were set with
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`,
+	except when in passthrough mode. In passthrough mode the core
+	does nothing (for any CEC version) and this message has to be handled
+	by a follower instead.
+    * .. _`CEC-MSG-USER-CONTROL-PRESSED`:
+
+      - ``CEC_MSG_USER_CONTROL_PRESSED``
+      - If :ref:`CEC_CAP_RC <CEC-CAP-RC>` is set and if
+        :ref:`CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU <CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU>`
+	is set, then generate a remote control key
+	press. This message is always passed on to the follower(s).
+    * .. _`CEC-MSG-USER-CONTROL-RELEASED`:
+
+      - ``CEC_MSG_USER_CONTROL_RELEASED``
+      - If :ref:`CEC_CAP_RC <CEC-CAP-RC>` is set and if
+        :ref:`CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU <CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU>`
+        is set, then generate a remote control key
+	release. This message is always passed on to the follower(s).
+    * .. _`CEC-MSG-REPORT-PHYSICAL-ADDR`:
+
+      - ``CEC_MSG_REPORT_PHYSICAL_ADDR``
+      - The CEC framework will make note of the reported physical address
+	and then just pass the message on to the follower(s).
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_S_MODE <CEC_S_MODE>` can return the following
+error codes:
+
+EINVAL
+    The requested mode is invalid.
+
+EPERM
+    Monitor mode is requested, but the process does have the ``CAP_NET_ADMIN``
+    capability.
+
+EBUSY
+    Someone else is already an exclusive follower or initiator.
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-receive.rst b/Documentation/userspace-api/media/cec/cec-ioc-receive.rst
new file mode 100644
index 000000000..b2fc051e9
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-ioc-receive.rst
@@ -0,0 +1,382 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: CEC
+
+.. _CEC_TRANSMIT:
+.. _CEC_RECEIVE:
+
+***********************************
+ioctls CEC_RECEIVE and CEC_TRANSMIT
+***********************************
+
+Name
+====
+
+CEC_RECEIVE, CEC_TRANSMIT - Receive or transmit a CEC message
+
+Synopsis
+========
+
+.. c:macro:: CEC_RECEIVE
+
+``int ioctl(int fd, CEC_RECEIVE, struct cec_msg *argp)``
+
+.. c:macro:: CEC_TRANSMIT
+
+``int ioctl(int fd, CEC_TRANSMIT, struct cec_msg *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct cec_msg.
+
+Description
+===========
+
+To receive a CEC message the application has to fill in the
+``timeout`` field of struct :c:type:`cec_msg` and pass it to
+:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+If the file descriptor is in non-blocking mode and there are no received
+messages pending, then it will return -1 and set errno to the ``EAGAIN``
+error code. If the file descriptor is in blocking mode and ``timeout``
+is non-zero and no message arrived within ``timeout`` milliseconds, then
+it will return -1 and set errno to the ``ETIMEDOUT`` error code.
+
+A received message can be:
+
+1. a message received from another CEC device (the ``sequence`` field will
+   be 0).
+2. the result of an earlier non-blocking transmit (the ``sequence`` field will
+   be non-zero).
+
+To send a CEC message the application has to fill in the struct
+:c:type:`cec_msg` and pass it to :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`.
+The :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is only available if
+``CEC_CAP_TRANSMIT`` is set. If there is no more room in the transmit
+queue, then it will return -1 and set errno to the ``EBUSY`` error code.
+The transmit queue has enough room for 18 messages (about 1 second worth
+of 2-byte messages). Note that the CEC kernel framework will also reply
+to core messages (see :ref:`cec-core-processing`), so it is not a good
+idea to fully fill up the transmit queue.
+
+If the file descriptor is in non-blocking mode then the transmit will
+return 0 and the result of the transmit will be available via
+:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` once the transmit has finished
+(including waiting for a reply, if requested).
+
+The ``sequence`` field is filled in for every transmit and this can be
+checked against the received messages to find the corresponding transmit
+result.
+
+Normally calling :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` when the physical
+address is invalid (due to e.g. a disconnect) will return ``ENONET``.
+
+However, the CEC specification allows sending messages from 'Unregistered' to
+'TV' when the physical address is invalid since some TVs pull the hotplug detect
+pin of the HDMI connector low when they go into standby, or when switching to
+another input.
+
+When the hotplug detect pin goes low the EDID disappears, and thus the
+physical address, but the cable is still connected and CEC still works.
+In order to detect/wake up the device it is allowed to send poll and 'Image/Text
+View On' messages from initiator 0xf ('Unregistered') to destination 0 ('TV').
+
+.. tabularcolumns:: |p{1.0cm}|p{3.5cm}|p{13.0cm}|
+
+.. c:type:: cec_msg
+
+.. cssclass:: longtable
+
+.. flat-table:: struct cec_msg
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+    * - __u64
+      - ``tx_ts``
+      - Timestamp in ns of when the last byte of the message was transmitted.
+	The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock. To access
+	the same clock from userspace use :c:func:`clock_gettime`.
+    * - __u64
+      - ``rx_ts``
+      - Timestamp in ns of when the last byte of the message was received.
+	The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock. To access
+	the same clock from userspace use :c:func:`clock_gettime`.
+    * - __u32
+      - ``len``
+      - The length of the message. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` this is filled in
+	by the application. The driver will fill this in for
+	:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` it will be
+	filled in by the driver with the length of the reply message if ``reply`` was set.
+    * - __u32
+      - ``timeout``
+      - The timeout in milliseconds. This is the time the device will wait
+	for a message to be received before timing out. If it is set to 0,
+	then it will wait indefinitely when it is called by :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+	If it is 0 and it is called by :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`,
+	then it will be replaced by 1000 if the ``reply`` is non-zero or
+	ignored if ``reply`` is 0.
+    * - __u32
+      - ``sequence``
+      - A non-zero sequence number is automatically assigned by the CEC framework
+	for all transmitted messages. It is used by the CEC framework when it queues
+	the transmit result (when transmit was called in non-blocking mode). This
+	allows the application to associate the received message with the original
+	transmit.
+    * - __u32
+      - ``flags``
+      - Flags. See :ref:`cec-msg-flags` for a list of available flags.
+    * - __u8
+      - ``tx_status``
+      - The status bits of the transmitted message. See
+	:ref:`cec-tx-status` for the possible status values. It is 0 if
+	this message was received, not transmitted.
+    * - __u8
+      - ``msg[16]``
+      - The message payload. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` this is filled in by the
+	application. The driver will fill this in for :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+	For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` it will be filled in by the driver with
+	the payload of the reply message if ``timeout`` was set.
+    * - __u8
+      - ``reply``
+      - Wait until this message is replied. If ``reply`` is 0 and the
+	``timeout`` is 0, then don't wait for a reply but return after
+	transmitting the message. Ignored by :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+	The case where ``reply`` is 0 (this is the opcode for the Feature Abort
+	message) and ``timeout`` is non-zero is specifically allowed to make it
+	possible to send a message and wait up to ``timeout`` milliseconds for a
+	Feature Abort reply. In this case ``rx_status`` will either be set
+	to :ref:`CEC_RX_STATUS_TIMEOUT <CEC-RX-STATUS-TIMEOUT>` or
+	:ref:`CEC_RX_STATUS_FEATURE_ABORT <CEC-RX-STATUS-FEATURE-ABORT>`.
+
+	If the transmitter message is ``CEC_MSG_INITIATE_ARC`` then the ``reply``
+	values ``CEC_MSG_REPORT_ARC_INITIATED`` and ``CEC_MSG_REPORT_ARC_TERMINATED``
+	are processed differently: either value will match both possible replies.
+	The reason is that the ``CEC_MSG_INITIATE_ARC`` message is the only CEC
+	message that has two possible replies other than Feature Abort. The
+	``reply`` field will be updated with the actual reply so that it is
+	synchronized with the contents of the received message.
+    * - __u8
+      - ``rx_status``
+      - The status bits of the received message. See
+	:ref:`cec-rx-status` for the possible status values. It is 0 if
+	this message was transmitted, not received, unless this is the
+	reply to a transmitted message. In that case both ``rx_status``
+	and ``tx_status`` are set.
+    * - __u8
+      - ``tx_status``
+      - The status bits of the transmitted message. See
+	:ref:`cec-tx-status` for the possible status values. It is 0 if
+	this message was received, not transmitted.
+    * - __u8
+      - ``tx_arb_lost_cnt``
+      - A counter of the number of transmit attempts that resulted in the
+	Arbitration Lost error. This is only set if the hardware supports
+	this, otherwise it is always 0. This counter is only valid if the
+	:ref:`CEC_TX_STATUS_ARB_LOST <CEC-TX-STATUS-ARB-LOST>` status bit is set.
+    * - __u8
+      - ``tx_nack_cnt``
+      - A counter of the number of transmit attempts that resulted in the
+	Not Acknowledged error. This is only set if the hardware supports
+	this, otherwise it is always 0. This counter is only valid if the
+	:ref:`CEC_TX_STATUS_NACK <CEC-TX-STATUS-NACK>` status bit is set.
+    * - __u8
+      - ``tx_low_drive_cnt``
+      - A counter of the number of transmit attempts that resulted in the
+	Arbitration Lost error. This is only set if the hardware supports
+	this, otherwise it is always 0. This counter is only valid if the
+	:ref:`CEC_TX_STATUS_LOW_DRIVE <CEC-TX-STATUS-LOW-DRIVE>` status bit is set.
+    * - __u8
+      - ``tx_error_cnt``
+      - A counter of the number of transmit errors other than Arbitration
+	Lost or Not Acknowledged. This is only set if the hardware
+	supports this, otherwise it is always 0. This counter is only
+	valid if the :ref:`CEC_TX_STATUS_ERROR <CEC-TX-STATUS-ERROR>` status bit is set.
+
+.. tabularcolumns:: |p{6.2cm}|p{1.0cm}|p{10.3cm}|
+
+.. _cec-msg-flags:
+
+.. flat-table:: Flags for struct cec_msg
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-MSG-FL-REPLY-TO-FOLLOWERS`:
+
+      - ``CEC_MSG_FL_REPLY_TO_FOLLOWERS``
+      - 1
+      - If a CEC transmit expects a reply, then by default that reply is only sent to
+	the filehandle that called :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. If this
+	flag is set, then the reply is also sent to all followers, if any. If the
+	filehandle that called :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is also a
+	follower, then that filehandle will receive the reply twice: once as the
+	result of the :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`, and once via
+	:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+
+    * .. _`CEC-MSG-FL-RAW`:
+
+      - ``CEC_MSG_FL_RAW``
+      - 2
+      - Normally CEC messages are validated before transmitting them. If this
+        flag is set when :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is called,
+	then no validation takes place and the message is transmitted as-is.
+	This is useful when debugging CEC issues.
+	This flag is only allowed if the process has the ``CAP_SYS_RAWIO``
+	capability. If that is not set, then the ``EPERM`` error code is
+	returned.
+
+.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
+
+.. _cec-tx-status:
+
+.. flat-table:: CEC Transmit Status
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-TX-STATUS-OK`:
+
+      - ``CEC_TX_STATUS_OK``
+      - 0x01
+      - The message was transmitted successfully. This is mutually
+	exclusive with :ref:`CEC_TX_STATUS_MAX_RETRIES <CEC-TX-STATUS-MAX-RETRIES>`.
+	Other bits can still be set if earlier attempts met with failure before
+	the transmit was eventually successful.
+    * .. _`CEC-TX-STATUS-ARB-LOST`:
+
+      - ``CEC_TX_STATUS_ARB_LOST``
+      - 0x02
+      - CEC line arbitration was lost, i.e. another transmit started at the
+        same time with a higher priority. Optional status, not all hardware
+	can detect this error condition.
+    * .. _`CEC-TX-STATUS-NACK`:
+
+      - ``CEC_TX_STATUS_NACK``
+      - 0x04
+      - Message was not acknowledged. Note that some hardware cannot tell apart
+        a 'Not Acknowledged' status from other error conditions, i.e. the result
+	of a transmit is just OK or FAIL. In that case this status will be
+	returned when the transmit failed.
+    * .. _`CEC-TX-STATUS-LOW-DRIVE`:
+
+      - ``CEC_TX_STATUS_LOW_DRIVE``
+      - 0x08
+      - Low drive was detected on the CEC bus. This indicates that a
+	follower detected an error on the bus and requests a
+	retransmission. Optional status, not all hardware can detect this
+	error condition.
+    * .. _`CEC-TX-STATUS-ERROR`:
+
+      - ``CEC_TX_STATUS_ERROR``
+      - 0x10
+      - Some error occurred. This is used for any errors that do not fit
+	``CEC_TX_STATUS_ARB_LOST`` or ``CEC_TX_STATUS_LOW_DRIVE``, either because
+	the hardware could not tell which error occurred, or because the hardware
+	tested for other conditions besides those two. Optional status.
+    * .. _`CEC-TX-STATUS-MAX-RETRIES`:
+
+      - ``CEC_TX_STATUS_MAX_RETRIES``
+      - 0x20
+      - The transmit failed after one or more retries. This status bit is
+	mutually exclusive with :ref:`CEC_TX_STATUS_OK <CEC-TX-STATUS-OK>`.
+	Other bits can still be set to explain which failures were seen.
+    * .. _`CEC-TX-STATUS-ABORTED`:
+
+      - ``CEC_TX_STATUS_ABORTED``
+      - 0x40
+      - The transmit was aborted due to an HDMI disconnect, or the adapter
+        was unconfigured, or a transmit was interrupted, or the driver
+	returned an error when attempting to start a transmit.
+    * .. _`CEC-TX-STATUS-TIMEOUT`:
+
+      - ``CEC_TX_STATUS_TIMEOUT``
+      - 0x80
+      - The transmit timed out. This should not normally happen and this
+	indicates a driver problem.
+
+.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
+
+.. _cec-rx-status:
+
+.. flat-table:: CEC Receive Status
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-RX-STATUS-OK`:
+
+      - ``CEC_RX_STATUS_OK``
+      - 0x01
+      - The message was received successfully.
+    * .. _`CEC-RX-STATUS-TIMEOUT`:
+
+      - ``CEC_RX_STATUS_TIMEOUT``
+      - 0x02
+      - The reply to an earlier transmitted message timed out.
+    * .. _`CEC-RX-STATUS-FEATURE-ABORT`:
+
+      - ``CEC_RX_STATUS_FEATURE_ABORT``
+      - 0x04
+      - The message was received successfully but the reply was
+	``CEC_MSG_FEATURE_ABORT``. This status is only set if this message
+	was the reply to an earlier transmitted message.
+    * .. _`CEC-RX-STATUS-ABORTED`:
+
+      - ``CEC_RX_STATUS_ABORTED``
+      - 0x08
+      - The wait for a reply to an earlier transmitted message was aborted
+        because the HDMI cable was disconnected, the adapter was unconfigured
+	or the :ref:`CEC_TRANSMIT <CEC_RECEIVE>` that waited for a
+	reply was interrupted.
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` can return the following
+error codes:
+
+EAGAIN
+    No messages are in the receive queue, and the filehandle is in non-blocking mode.
+
+ETIMEDOUT
+    The ``timeout`` was reached while waiting for a message.
+
+ERESTARTSYS
+    The wait for a message was interrupted (e.g. by Ctrl-C).
+
+The :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` can return the following
+error codes:
+
+ENOTTY
+    The ``CEC_CAP_TRANSMIT`` capability wasn't set, so this ioctl is not supported.
+
+EPERM
+    The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+    has never been called, or ``CEC_MSG_FL_RAW`` was used from a process that
+    did not have the ``CAP_SYS_RAWIO`` capability.
+
+ENONET
+    The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+    was called, but the physical address is invalid so no logical address was claimed.
+    An exception is made in this case for transmits from initiator 0xf ('Unregistered')
+    to destination 0 ('TV'). In that case the transmit will proceed as usual.
+
+EBUSY
+    Another filehandle is in exclusive follower or initiator mode, or the filehandle
+    is in mode ``CEC_MODE_NO_INITIATOR``. This is also returned if the transmit
+    queue is full.
+
+EINVAL
+    The contents of struct :c:type:`cec_msg` is invalid.
+
+ERESTARTSYS
+    The wait for a successful transmit was interrupted (e.g. by Ctrl-C).
diff --git a/Documentation/userspace-api/media/cec/cec-pin-error-inj.rst b/Documentation/userspace-api/media/cec/cec-pin-error-inj.rst
new file mode 100644
index 000000000..064c8c5a1
--- /dev/null
+++ b/Documentation/userspace-api/media/cec/cec-pin-error-inj.rst
@@ -0,0 +1,327 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+CEC Pin Framework Error Injection
+=================================
+
+The CEC Pin Framework is a core CEC framework for CEC hardware that only
+has low-level support for the CEC bus. Most hardware today will have
+high-level CEC support where the hardware deals with driving the CEC bus,
+but some older devices aren't that fancy. However, this framework also
+allows you to connect the CEC pin to a GPIO on e.g. a Raspberry Pi and
+you have now made a CEC adapter.
+
+What makes doing this so interesting is that since we have full control
+over the bus it is easy to support error injection. This is ideal to
+test how well CEC adapters can handle error conditions.
+
+Currently only the cec-gpio driver (when the CEC line is directly
+connected to a pull-up GPIO line) and the AllWinner A10/A20 drm driver
+support this framework.
+
+If ``CONFIG_CEC_PIN_ERROR_INJ`` is enabled, then error injection is available
+through debugfs. Specifically, in ``/sys/kernel/debug/cec/cecX/`` there is
+now an ``error-inj`` file.
+
+.. note::
+
+    The error injection commands are not a stable ABI and may change in the
+    future.
+
+With ``cat error-inj`` you can see both the possible commands and the current
+error injection status::
+
+	$ cat /sys/kernel/debug/cec/cec0/error-inj
+	# Clear error injections:
+	#   clear          clear all rx and tx error injections
+	#   rx-clear       clear all rx error injections
+	#   tx-clear       clear all tx error injections
+	#   <op> clear     clear all rx and tx error injections for <op>
+	#   <op> rx-clear  clear all rx error injections for <op>
+	#   <op> tx-clear  clear all tx error injections for <op>
+	#
+	# RX error injection:
+	#   <op>[,<mode>] rx-nack              NACK the message instead of sending an ACK
+	#   <op>[,<mode>] rx-low-drive <bit>   force a low-drive condition at this bit position
+	#   <op>[,<mode>] rx-add-byte          add a spurious byte to the received CEC message
+	#   <op>[,<mode>] rx-remove-byte       remove the last byte from the received CEC message
+	#   <op>[,<mode>] rx-arb-lost <poll>   generate a POLL message to trigger an arbitration lost
+	#
+	# TX error injection settings:
+	#   tx-ignore-nack-until-eom           ignore early NACKs until EOM
+	#   tx-custom-low-usecs <usecs>        define the 'low' time for the custom pulse
+	#   tx-custom-high-usecs <usecs>       define the 'high' time for the custom pulse
+	#   tx-custom-pulse                    transmit the custom pulse once the bus is idle
+	#
+	# TX error injection:
+	#   <op>[,<mode>] tx-no-eom            don't set the EOM bit
+	#   <op>[,<mode>] tx-early-eom         set the EOM bit one byte too soon
+	#   <op>[,<mode>] tx-add-bytes <num>   append <num> (1-255) spurious bytes to the message
+	#   <op>[,<mode>] tx-remove-byte       drop the last byte from the message
+	#   <op>[,<mode>] tx-short-bit <bit>   make this bit shorter than allowed
+	#   <op>[,<mode>] tx-long-bit <bit>    make this bit longer than allowed
+	#   <op>[,<mode>] tx-custom-bit <bit>  send the custom pulse instead of this bit
+	#   <op>[,<mode>] tx-short-start       send a start pulse that's too short
+	#   <op>[,<mode>] tx-long-start        send a start pulse that's too long
+	#   <op>[,<mode>] tx-custom-start      send the custom pulse instead of the start pulse
+	#   <op>[,<mode>] tx-last-bit <bit>    stop sending after this bit
+	#   <op>[,<mode>] tx-low-drive <bit>   force a low-drive condition at this bit position
+	#
+	# <op>       CEC message opcode (0-255) or 'any'
+	# <mode>     'once' (default), 'always', 'toggle' or 'off'
+	# <bit>      CEC message bit (0-159)
+	#            10 bits per 'byte': bits 0-7: data, bit 8: EOM, bit 9: ACK
+	# <poll>     CEC poll message used to test arbitration lost (0x00-0xff, default 0x0f)
+	# <usecs>    microseconds (0-10000000, default 1000)
+
+	clear
+
+You can write error injection commands to ``error-inj`` using
+``echo 'cmd' >error-inj`` or ``cat cmd.txt >error-inj``. The ``cat error-inj``
+output contains the current error commands. You can save the output to a file
+and use it as an input to ``error-inj`` later.
+
+Basic Syntax
+------------
+
+Leading spaces/tabs are ignored. If the next character is a ``#`` or the end
+of the line was reached, then the whole line is ignored. Otherwise a command
+is expected.
+
+The error injection commands fall in two main groups: those relating to
+receiving CEC messages and those relating to transmitting CEC messages. In
+addition, there are commands to clear existing error injection commands and
+to create custom pulses on the CEC bus.
+
+Most error injection commands can be executed for specific CEC opcodes or for
+all opcodes (``any``). Each command also has a 'mode' which can be ``off``
+(can be used to turn off an existing error injection command), ``once``
+(the default) which will trigger the error injection only once for the next
+received or transmitted message, ``always`` to always trigger the error
+injection and ``toggle`` to toggle the error injection on or off for every
+transmit or receive.
+
+So '``any rx-nack``' will NACK the next received CEC message,
+'``any,always rx-nack``' will NACK all received CEC messages and
+'``0x82,toggle rx-nack``' will only NACK if an Active Source message was
+received and do that only for every other received message.
+
+After an error was injected with mode ``once`` the error injection command
+is cleared automatically, so ``once`` is a one-time deal.
+
+All combinations of ``<op>`` and error injection commands can co-exist. So
+this is fine::
+
+	0x9e tx-add-bytes 1
+	0x9e tx-early-eom
+	0x9f tx-add-bytes 2
+	any rx-nack
+
+All four error injection commands will be active simultaneously.
+
+However, if the same ``<op>`` and command combination is specified,
+but with different arguments::
+
+	0x9e tx-add-bytes 1
+	0x9e tx-add-bytes 2
+
+Then the second will overwrite the first.
+
+Clear Error Injections
+----------------------
+
+``clear``
+    Clear all error injections.
+
+``rx-clear``
+    Clear all receive error injections
+
+``tx-clear``
+    Clear all transmit error injections
+
+``<op> clear``
+    Clear all error injections for the given opcode.
+
+``<op> rx-clear``
+    Clear all receive error injections for the given opcode.
+
+``<op> tx-clear``
+    Clear all transmit error injections for the given opcode.
+
+Receive Messages
+----------------
+
+``<op>[,<mode>] rx-nack``
+    NACK broadcast messages and messages directed to this CEC adapter.
+    Every byte of the message will be NACKed in case the transmitter
+    keeps transmitting after the first byte was NACKed.
+
+``<op>[,<mode>] rx-low-drive <bit>``
+    Force a Low Drive condition at this bit position. If <op> specifies
+    a specific CEC opcode then the bit position must be at least 18,
+    otherwise the opcode hasn't been received yet. This tests if the
+    transmitter can handle the Low Drive condition correctly and reports
+    the error correctly. Note that a Low Drive in the first 4 bits can also
+    be interpreted as an Arbitration Lost condition by the transmitter.
+    This is implementation dependent.
+
+``<op>[,<mode>] rx-add-byte``
+    Add a spurious 0x55 byte to the received CEC message, provided
+    the message was 15 bytes long or less. This is useful to test
+    the high-level protocol since spurious bytes should be ignored.
+
+``<op>[,<mode>] rx-remove-byte``
+    Remove the last byte from the received CEC message, provided it
+    was at least 2 bytes long. This is useful to test the high-level
+    protocol since messages that are too short should be ignored.
+
+``<op>[,<mode>] rx-arb-lost <poll>``
+    Generate a POLL message to trigger an Arbitration Lost condition.
+    This command is only allowed for ``<op>`` values of ``next`` or ``all``.
+    As soon as a start bit has been received the CEC adapter will switch
+    to transmit mode and it will transmit a POLL message. By default this is
+    0x0f, but it can also be specified explicitly via the ``<poll>`` argument.
+
+    This command can be used to test the Arbitration Lost condition in
+    the remote CEC transmitter. Arbitration happens when two CEC adapters
+    start sending a message at the same time. In that case the initiator
+    with the most leading zeroes wins and the other transmitter has to
+    stop transmitting ('Arbitration Lost'). This is very hard to test,
+    except by using this error injection command.
+
+    This does not work if the remote CEC transmitter has logical address
+    0 ('TV') since that will always win.
+
+Transmit Messages
+-----------------
+
+``tx-ignore-nack-until-eom``
+    This setting changes the behavior of transmitting CEC messages. Normally
+    as soon as the receiver NACKs a byte the transmit will stop, but the
+    specification also allows that the full message is transmitted and only
+    at the end will the transmitter look at the ACK bit. This is not
+    recommended behavior since there is no point in keeping the CEC bus busy
+    for longer than is strictly needed. Especially given how slow the bus is.
+
+    This setting can be used to test how well a receiver deals with
+    transmitters that ignore NACKs until the very end of the message.
+
+``<op>[,<mode>] tx-no-eom``
+    Don't set the EOM bit. Normally the last byte of the message has the EOM
+    (End-Of-Message) bit set. With this command the transmit will just stop
+    without ever sending an EOM. This can be used to test how a receiver
+    handles this case. Normally receivers have a time-out after which
+    they will go back to the Idle state.
+
+``<op>[,<mode>] tx-early-eom``
+    Set the EOM bit one byte too soon. This obviously only works for messages
+    of two bytes or more. The EOM bit will be set for the second-to-last byte
+    and not for the final byte. The receiver should ignore the last byte in
+    this case. Since the resulting message is likely to be too short for this
+    same reason the whole message is typically ignored. The receiver should be
+    in Idle state after the last byte was transmitted.
+
+``<op>[,<mode>] tx-add-bytes <num>``
+    Append ``<num>`` (1-255) spurious bytes to the message. The extra bytes
+    have the value of the byte position in the message. So if you transmit a
+    two byte message (e.g. a Get CEC Version message) and add 2 bytes, then
+    the full message received by the remote CEC adapter is
+    ``0x40 0x9f 0x02 0x03``.
+
+    This command can be used to test buffer overflows in the receiver. E.g.
+    what does it do when it receives more than the maximum message size of 16
+    bytes.
+
+``<op>[,<mode>] tx-remove-byte``
+    Drop the last byte from the message, provided the message is at least
+    two bytes long. The receiver should ignore messages that are too short.
+
+``<op>[,<mode>] tx-short-bit <bit>``
+    Make this bit period shorter than allowed. The bit position cannot be
+    an Ack bit.  If <op> specifies a specific CEC opcode then the bit position
+    must be at least 18, otherwise the opcode hasn't been received yet.
+    Normally the period of a data bit is between 2.05 and 2.75 milliseconds.
+    With this command the period of this bit is 1.8 milliseconds, this is
+    done by reducing the time the CEC bus is high. This bit period is less
+    than is allowed and the receiver should respond with a Low Drive
+    condition.
+
+    This command is ignored for 0 bits in bit positions 0 to 3. This is
+    because the receiver also looks for an Arbitration Lost condition in
+    those first four bits and it is undefined what will happen if it
+    sees a too-short 0 bit.
+
+``<op>[,<mode>] tx-long-bit <bit>``
+    Make this bit period longer than is valid. The bit position cannot be
+    an Ack bit.  If <op> specifies a specific CEC opcode then the bit position
+    must be at least 18, otherwise the opcode hasn't been received yet.
+    Normally the period of a data bit is between 2.05 and 2.75 milliseconds.
+    With this command the period of this bit is 2.9 milliseconds, this is
+    done by increasing the time the CEC bus is high.
+
+    Even though this bit period is longer than is valid it is undefined what
+    a receiver will do. It might just accept it, or it might time out and
+    return to Idle state. Unfortunately the CEC specification is silent about
+    this.
+
+    This command is ignored for 0 bits in bit positions 0 to 3. This is
+    because the receiver also looks for an Arbitration Lost condition in
+    those first four bits and it is undefined what will happen if it
+    sees a too-long 0 bit.
+
+``<op>[,<mode>] tx-short-start``
+    Make this start bit period shorter than allowed. Normally the period of
+    a start bit is between 4.3 and 4.7 milliseconds. With this command the
+    period of the start bit is 4.1 milliseconds, this is done by reducing
+    the time the CEC bus is high. This start bit period is less than is
+    allowed and the receiver should return to Idle state when this is detected.
+
+``<op>[,<mode>] tx-long-start``
+    Make this start bit period longer than is valid. Normally the period of
+    a start bit is between 4.3 and 4.7 milliseconds. With this command the
+    period of the start bit is 5 milliseconds, this is done by increasing
+    the time the CEC bus is high. This start bit period is more than is
+    valid and the receiver should return to Idle state when this is detected.
+
+    Even though this start bit period is longer than is valid it is undefined
+    what a receiver will do. It might just accept it, or it might time out and
+    return to Idle state. Unfortunately the CEC specification is silent about
+    this.
+
+``<op>[,<mode>] tx-last-bit <bit>``
+    Just stop transmitting after this bit.  If <op> specifies a specific CEC
+    opcode then the bit position must be at least 18, otherwise the opcode
+    hasn't been received yet. This command can be used to test how the receiver
+    reacts when a message just suddenly stops. It should time out and go back
+    to Idle state.
+
+``<op>[,<mode>] tx-low-drive <bit>``
+    Force a Low Drive condition at this bit position. If <op> specifies a
+    specific CEC opcode then the bit position must be at least 18, otherwise
+    the opcode hasn't been received yet. This can be used to test how the
+    receiver handles Low Drive conditions. Note that if this happens at bit
+    positions 0-3 the receiver can interpret this as an Arbitration Lost
+    condition. This is implementation dependent.
+
+Custom Pulses
+-------------
+
+``tx-custom-low-usecs <usecs>``
+    This defines the duration in microseconds that the custom pulse pulls
+    the CEC line low. The default is 1000 microseconds.
+
+``tx-custom-high-usecs <usecs>``
+    This defines the duration in microseconds that the custom pulse keeps the
+    CEC line high (unless another CEC adapter pulls it low in that time).
+    The default is 1000 microseconds. The total period of the custom pulse is
+    ``tx-custom-low-usecs + tx-custom-high-usecs``.
+
+``<op>[,<mode>] tx-custom-bit <bit>``
+    Send the custom bit instead of a regular data bit. The bit position cannot
+    be an Ack bit.  If <op> specifies a specific CEC opcode then the bit
+    position must be at least 18, otherwise the opcode hasn't been received yet.
+
+``<op>[,<mode>] tx-custom-start``
+    Send the custom bit instead of a regular start bit.
+
+``tx-custom-pulse``
+    Transmit a single custom pulse as soon as the CEC bus is idle.
diff --git a/Documentation/userspace-api/media/conf_nitpick.py b/Documentation/userspace-api/media/conf_nitpick.py
new file mode 100644
index 000000000..0a8e236d0
--- /dev/null
+++ b/Documentation/userspace-api/media/conf_nitpick.py
@@ -0,0 +1,111 @@
+# -*- coding: utf-8; mode: python -*-
+
+# SPDX-License-Identifier: GPL-2.0
+
+project = 'Linux Media Subsystem Documentation'
+
+# It is possible to run Sphinx in nickpick mode with:
+nitpicky = True
+
+# within nit-picking build, do not refer to any intersphinx object
+intersphinx_mapping = {}
+
+# In nickpick mode, it will complain about lots of missing references that
+#
+# 1) are just typedefs like: bool, __u32, etc;
+# 2) It will complain for things like: enum, NULL;
+# 3) It will complain for symbols that should be on different
+#    books (but currently aren't ported to ReST)
+#
+# The list below has a list of such symbols to be ignored in nitpick mode
+#
+nitpick_ignore = [
+    ("c:func", "clock_gettime"),
+    ("c:func", "close"),
+    ("c:func", "container_of"),
+    ("c:func", "copy_from_user"),
+    ("c:func", "copy_to_user"),
+    ("c:func", "determine_valid_ioctls"),
+    ("c:func", "ERR_PTR"),
+    ("c:func", "i2c_new_client_device"),
+    ("c:func", "ioctl"),
+    ("c:func", "IS_ERR"),
+    ("c:func", "KERNEL_VERSION"),
+    ("c:func", "mmap"),
+    ("c:func", "open"),
+    ("c:func", "pci_name"),
+    ("c:func", "poll"),
+    ("c:func", "PTR_ERR"),
+    ("c:func", "read"),
+    ("c:func", "release"),
+    ("c:func", "set"),
+    ("c:func", "struct fd_set"),
+    ("c:func", "struct pollfd"),
+    ("c:func", "usb_make_path"),
+    ("c:func", "wait_finish"),
+    ("c:func", "wait_prepare"),
+    ("c:func", "write"),
+
+    ("c:type", "atomic_t"),
+    ("c:type", "bool"),
+    ("c:type", "boolean"),
+    ("c:type", "buf_queue"),
+    ("c:type", "device"),
+    ("c:type", "device_driver"),
+    ("c:type", "device_node"),
+    ("c:type", "enum"),
+    ("c:type", "fd"),
+    ("c:type", "fd_set"),
+    ("c:type", "file"),
+    ("c:type", "i2c_adapter"),
+    ("c:type", "i2c_board_info"),
+    ("c:type", "i2c_client"),
+    ("c:type", "int16_t"),
+    ("c:type", "ktime_t"),
+    ("c:type", "led_classdev_flash"),
+    ("c:type", "list_head"),
+    ("c:type", "lock_class_key"),
+    ("c:type", "module"),
+    ("c:type", "mutex"),
+    ("c:type", "NULL"),
+    ("c:type", "off_t"),
+    ("c:type", "pci_dev"),
+    ("c:type", "pdvbdev"),
+    ("c:type", "poll_table"),
+    ("c:type", "platform_device"),
+    ("c:type", "pollfd"),
+    ("c:type", "poll_table_struct"),
+    ("c:type", "s32"),
+    ("c:type", "s64"),
+    ("c:type", "sd"),
+    ("c:type", "size_t"),
+    ("c:type", "spi_board_info"),
+    ("c:type", "spi_device"),
+    ("c:type", "spi_master"),
+    ("c:type", "ssize_t"),
+    ("c:type", "fb_fix_screeninfo"),
+    ("c:type", "pollfd"),
+    ("c:type", "timeval"),
+    ("c:type", "video_capability"),
+    ("c:type", "timeval"),
+    ("c:type", "__u16"),
+    ("c:type", "u16"),
+    ("c:type", "__u32"),
+    ("c:type", "u32"),
+    ("c:type", "__u64"),
+    ("c:type", "u64"),
+    ("c:type", "u8"),
+    ("c:type", "uint16_t"),
+    ("c:type", "uint32_t"),
+    ("c:type", "union"),
+    ("c:type", "__user"),
+    ("c:type", "usb_device"),
+    ("c:type", "usb_interface"),
+    ("c:type", "v4l2_std_id"),
+    ("c:type", "video_system_t"),
+    ("c:type", "vm_area_struct"),
+
+    # Opaque structures
+
+    ("c:type", "v4l2_m2m_dev"),
+]
diff --git a/Documentation/userspace-api/media/dmx.h.rst.exceptions b/Documentation/userspace-api/media/dmx.h.rst.exceptions
new file mode 100644
index 000000000..afc14d384
--- /dev/null
+++ b/Documentation/userspace-api/media/dmx.h.rst.exceptions
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _UAPI_DVBDMX_H_
+
+# Ignore limit constants
+ignore define DMX_FILTER_SIZE
+
+# dmx_pes_type_t enum symbols
+replace enum dmx_ts_pes :c:type:`dmx_pes_type`
+replace symbol DMX_PES_AUDIO0 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_VIDEO0 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_TELETEXT0 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_SUBTITLE0 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_PCR0 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_AUDIO1 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_VIDEO1 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_TELETEXT1 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_SUBTITLE1 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_PCR1 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_AUDIO2 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_VIDEO2 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_TELETEXT2 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_SUBTITLE2 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_PCR2 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_AUDIO3 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_VIDEO3 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_TELETEXT3 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_SUBTITLE3 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_PCR3 :c:type:`dmx_pes_type`
+replace symbol DMX_PES_OTHER :c:type:`dmx_pes_type`
+
+# Ignore obsolete symbols
+ignore define DMX_PES_AUDIO
+ignore define DMX_PES_VIDEO
+ignore define DMX_PES_TELETEXT
+ignore define DMX_PES_SUBTITLE
+ignore define DMX_PES_PCR
+
+# dmx_input_t symbols
+replace enum dmx_input :c:type:`dmx_input`
+replace symbol DMX_IN_FRONTEND :c:type:`dmx_input`
+replace symbol DMX_IN_DVR :c:type:`dmx_input`
+
+# Flags for struct dmx_sct_filter_params
+replace define DMX_CHECK_CRC :c:type:`dmx_sct_filter_params`
+replace define DMX_ONESHOT :c:type:`dmx_sct_filter_params`
+replace define DMX_IMMEDIATE_START :c:type:`dmx_sct_filter_params`
+
+# some typedefs should point to struct/enums
+replace typedef dmx_filter_t :c:type:`dmx_filter`
+replace typedef dmx_pes_type_t :c:type:`dmx_pes_type`
+replace typedef dmx_input_t :c:type:`dmx_input`
+
+replace symbol DMX_BUFFER_FLAG_HAD_CRC32_DISCARD :c:type:`dmx_buffer_flags`
+replace	symbol DMX_BUFFER_FLAG_TEI :c:type:`dmx_buffer_flags`
+replace	symbol DMX_BUFFER_PKT_COUNTER_MISMATCH :c:type:`dmx_buffer_flags`
+replace	symbol DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED :c:type:`dmx_buffer_flags`
+replace	symbol DMX_BUFFER_FLAG_DISCONTINUITY_INDICATOR :c:type:`dmx_buffer_flags`
+
+replace symbol DMX_OUT_DECODER :c:type:`dmx_output`
+replace symbol DMX_OUT_TAP :c:type:`dmx_output`
+replace symbol DMX_OUT_TS_TAP :c:type:`dmx_output`
+replace symbol DMX_OUT_TSDEMUX_TAP :c:type:`dmx_output`
+
+replace ioctl DMX_DQBUF dmx_qbuf
diff --git a/Documentation/userspace-api/media/drivers/cx2341x-uapi.rst b/Documentation/userspace-api/media/drivers/cx2341x-uapi.rst
new file mode 100644
index 000000000..8a7977af7
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/cx2341x-uapi.rst
@@ -0,0 +1,179 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+The cx2341x driver
+==================
+
+Non-compressed file format
+--------------------------
+
+The cx23416 can produce (and the cx23415 can also read) raw YUV output. The
+format of a YUV frame is specific to this chip and is called HM12. 'HM' stands
+for 'Hauppauge Macroblock', which is a misnomer as 'Conexant Macroblock' would
+be more accurate.
+
+The format is YUV 4:2:0 which uses 1 Y byte per pixel and 1 U and V byte per
+four pixels.
+
+The data is encoded as two macroblock planes, the first containing the Y
+values, the second containing UV macroblocks.
+
+The Y plane is divided into blocks of 16x16 pixels from left to right
+and from top to bottom. Each block is transmitted in turn, line-by-line.
+
+So the first 16 bytes are the first line of the top-left block, the
+second 16 bytes are the second line of the top-left block, etc. After
+transmitting this block the first line of the block on the right to the
+first block is transmitted, etc.
+
+The UV plane is divided into blocks of 16x8 UV values going from left
+to right, top to bottom. Each block is transmitted in turn, line-by-line.
+
+So the first 16 bytes are the first line of the top-left block and
+contain 8 UV value pairs (16 bytes in total). The second 16 bytes are the
+second line of 8 UV pairs of the top-left block, etc. After transmitting
+this block the first line of the block on the right to the first block is
+transmitted, etc.
+
+The code below is given as an example on how to convert HM12 to separate
+Y, U and V planes. This code assumes frames of 720x576 (PAL) pixels.
+
+The width of a frame is always 720 pixels, regardless of the actual specified
+width.
+
+If the height is not a multiple of 32 lines, then the captured video is
+missing macroblocks at the end and is unusable. So the height must be a
+multiple of 32.
+
+Raw format c example
+~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: c
+
+	#include <stdio.h>
+	#include <stdlib.h>
+	#include <string.h>
+
+	static unsigned char frame[576*720*3/2];
+	static unsigned char framey[576*720];
+	static unsigned char frameu[576*720 / 4];
+	static unsigned char framev[576*720 / 4];
+
+	static void de_macro_y(unsigned char* dst, unsigned char *src, int dstride, int w, int h)
+	{
+	unsigned int y, x, i;
+
+	// descramble Y plane
+	// dstride = 720 = w
+	// The Y plane is divided into blocks of 16x16 pixels
+	// Each block in transmitted in turn, line-by-line.
+	for (y = 0; y < h; y += 16) {
+		for (x = 0; x < w; x += 16) {
+		for (i = 0; i < 16; i++) {
+			memcpy(dst + x + (y + i) * dstride, src, 16);
+			src += 16;
+		}
+		}
+	}
+	}
+
+	static void de_macro_uv(unsigned char *dstu, unsigned char *dstv, unsigned char *src, int dstride, int w, int h)
+	{
+	unsigned int y, x, i;
+
+	// descramble U/V plane
+	// dstride = 720 / 2 = w
+	// The U/V values are interlaced (UVUV...).
+	// Again, the UV plane is divided into blocks of 16x16 UV values.
+	// Each block in transmitted in turn, line-by-line.
+	for (y = 0; y < h; y += 16) {
+		for (x = 0; x < w; x += 8) {
+		for (i = 0; i < 16; i++) {
+			int idx = x + (y + i) * dstride;
+
+			dstu[idx+0] = src[0];  dstv[idx+0] = src[1];
+			dstu[idx+1] = src[2];  dstv[idx+1] = src[3];
+			dstu[idx+2] = src[4];  dstv[idx+2] = src[5];
+			dstu[idx+3] = src[6];  dstv[idx+3] = src[7];
+			dstu[idx+4] = src[8];  dstv[idx+4] = src[9];
+			dstu[idx+5] = src[10]; dstv[idx+5] = src[11];
+			dstu[idx+6] = src[12]; dstv[idx+6] = src[13];
+			dstu[idx+7] = src[14]; dstv[idx+7] = src[15];
+			src += 16;
+		}
+		}
+	}
+	}
+
+	/*************************************************************************/
+	int main(int argc, char **argv)
+	{
+	FILE *fin;
+	int i;
+
+	if (argc == 1) fin = stdin;
+	else fin = fopen(argv[1], "r");
+
+	if (fin == NULL) {
+		fprintf(stderr, "cannot open input\n");
+		exit(-1);
+	}
+	while (fread(frame, sizeof(frame), 1, fin) == 1) {
+		de_macro_y(framey, frame, 720, 720, 576);
+		de_macro_uv(frameu, framev, frame + 720 * 576, 720 / 2, 720 / 2, 576 / 2);
+		fwrite(framey, sizeof(framey), 1, stdout);
+		fwrite(framev, sizeof(framev), 1, stdout);
+		fwrite(frameu, sizeof(frameu), 1, stdout);
+	}
+	fclose(fin);
+	return 0;
+	}
+
+
+Format of embedded V4L2_MPEG_STREAM_VBI_FMT_IVTV VBI data
+---------------------------------------------------------
+
+Author: Hans Verkuil <hverkuil@xs4all.nl>
+
+
+This section describes the V4L2_MPEG_STREAM_VBI_FMT_IVTV format of the VBI data
+embedded in an MPEG-2 program stream. This format is in part dictated by some
+hardware limitations of the ivtv driver (the driver for the Conexant cx23415/6
+chips), in particular a maximum size for the VBI data. Anything longer is cut
+off when the MPEG stream is played back through the cx23415.
+
+The advantage of this format is it is very compact and that all VBI data for
+all lines can be stored while still fitting within the maximum allowed size.
+
+The stream ID of the VBI data is 0xBD. The maximum size of the embedded data is
+4 + 43 * 36, which is 4 bytes for a header and 2 * 18 VBI lines with a 1 byte
+header and a 42 bytes payload each. Anything beyond this limit is cut off by
+the cx23415/6 firmware. Besides the data for the VBI lines we also need 36 bits
+for a bitmask determining which lines are captured and 4 bytes for a magic cookie,
+signifying that this data package contains V4L2_MPEG_STREAM_VBI_FMT_IVTV VBI data.
+If all lines are used, then there is no longer room for the bitmask. To solve this
+two different magic numbers were introduced:
+
+'itv0': After this magic number two unsigned longs follow. Bits 0-17 of the first
+unsigned long denote which lines of the first field are captured. Bits 18-31 of
+the first unsigned long and bits 0-3 of the second unsigned long are used for the
+second field.
+
+'ITV0': This magic number assumes all VBI lines are captured, i.e. it implicitly
+implies that the bitmasks are 0xffffffff and 0xf.
+
+After these magic cookies (and the 8 byte bitmask in case of cookie 'itv0') the
+captured VBI lines start:
+
+For each line the least significant 4 bits of the first byte contain the data type.
+Possible values are shown in the table below. The payload is in the following 42
+bytes.
+
+Here is the list of possible data types:
+
+.. code-block:: c
+
+	#define IVTV_SLICED_TYPE_TELETEXT       0x1     // Teletext (uses lines 6-22 for PAL)
+	#define IVTV_SLICED_TYPE_CC             0x4     // Closed Captions (line 21 NTSC)
+	#define IVTV_SLICED_TYPE_WSS            0x5     // Wide Screen Signal (line 23 PAL)
+	#define IVTV_SLICED_TYPE_VPS            0x7     // Video Programming System (PAL) (line 16)
+
diff --git a/Documentation/userspace-api/media/drivers/imx-uapi.rst b/Documentation/userspace-api/media/drivers/imx-uapi.rst
new file mode 100644
index 000000000..8d47712de
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/imx-uapi.rst
@@ -0,0 +1,125 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=========================
+i.MX Video Capture Driver
+=========================
+
+Events
+======
+
+.. _imx_api_ipuX_csiY:
+
+ipuX_csiY
+---------
+
+This subdev can generate the following event when enabling the second
+IDMAC source pad:
+
+- V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR
+
+The user application can subscribe to this event from the ipuX_csiY
+subdev node. This event is generated by the Frame Interval Monitor
+(see below for more on the FIM).
+
+Controls
+========
+
+.. _imx_api_FIM:
+
+Frame Interval Monitor in ipuX_csiY
+-----------------------------------
+
+The adv718x decoders can occasionally send corrupt fields during
+NTSC/PAL signal re-sync (too little or too many video lines). When
+this happens, the IPU triggers a mechanism to re-establish vertical
+sync by adding 1 dummy line every frame, which causes a rolling effect
+from image to image, and can last a long time before a stable image is
+recovered. Or sometimes the mechanism doesn't work at all, causing a
+permanent split image (one frame contains lines from two consecutive
+captured images).
+
+From experiment it was found that during image rolling, the frame
+intervals (elapsed time between two EOF's) drop below the nominal
+value for the current standard, by about one frame time (60 usec),
+and remain at that value until rolling stops.
+
+While the reason for this observation isn't known (the IPU dummy
+line mechanism should show an increase in the intervals by 1 line
+time every frame, not a fixed value), we can use it to detect the
+corrupt fields using a frame interval monitor. If the FIM detects a
+bad frame interval, the ipuX_csiY subdev will send the event
+V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR. Userland can register with
+the FIM event notification on the ipuX_csiY subdev device node.
+Userland can issue a streaming restart when this event is received
+to correct the rolling/split image.
+
+The ipuX_csiY subdev includes custom controls to tweak some dials for
+FIM. If one of these controls is changed during streaming, the FIM will
+be reset and will continue at the new settings.
+
+- V4L2_CID_IMX_FIM_ENABLE
+
+Enable/disable the FIM.
+
+- V4L2_CID_IMX_FIM_NUM
+
+How many frame interval measurements to average before comparing against
+the nominal frame interval reported by the sensor. This can reduce noise
+caused by interrupt latency.
+
+- V4L2_CID_IMX_FIM_TOLERANCE_MIN
+
+If the averaged intervals fall outside nominal by this amount, in
+microseconds, the V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR event is sent.
+
+- V4L2_CID_IMX_FIM_TOLERANCE_MAX
+
+If any intervals are higher than this value, those samples are
+discarded and do not enter into the average. This can be used to
+discard really high interval errors that might be due to interrupt
+latency from high system load.
+
+- V4L2_CID_IMX_FIM_NUM_SKIP
+
+How many frames to skip after a FIM reset or stream restart before
+FIM begins to average intervals.
+
+- V4L2_CID_IMX_FIM_ICAP_CHANNEL / V4L2_CID_IMX_FIM_ICAP_EDGE
+
+These controls will configure an input capture channel as the method
+for measuring frame intervals. This is superior to the default method
+of measuring frame intervals via EOF interrupt, since it is not subject
+to uncertainty errors introduced by interrupt latency.
+
+Input capture requires hardware support. A VSYNC signal must be routed
+to one of the i.MX6 input capture channel pads.
+
+V4L2_CID_IMX_FIM_ICAP_CHANNEL configures which i.MX6 input capture
+channel to use. This must be 0 or 1.
+
+V4L2_CID_IMX_FIM_ICAP_EDGE configures which signal edge will trigger
+input capture events. By default the input capture method is disabled
+with a value of IRQ_TYPE_NONE. Set this control to IRQ_TYPE_EDGE_RISING,
+IRQ_TYPE_EDGE_FALLING, or IRQ_TYPE_EDGE_BOTH to enable input capture,
+triggered on the given signal edge(s).
+
+When input capture is disabled, frame intervals will be measured via
+EOF interrupt.
+
+
+File list
+---------
+
+drivers/staging/media/imx/
+include/media/imx.h
+include/linux/imx-media.h
+
+
+Authors
+-------
+
+- Steve Longerbeam <steve_longerbeam@mentor.com>
+- Philipp Zabel <kernel@pengutronix.de>
+- Russell King <linux@armlinux.org.uk>
+
+Copyright (C) 2012-2017 Mentor Graphics Inc.
diff --git a/Documentation/userspace-api/media/drivers/index.rst b/Documentation/userspace-api/media/drivers/index.rst
new file mode 100644
index 000000000..05a82f8c0
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/index.rst
@@ -0,0 +1,39 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: <isonum.txt>
+
+.. _v4l-drivers_uapi:
+
+################################################
+Video4Linux (V4L)  driver-specific documentation
+################################################
+
+**Copyright** |copy| 1999-2016 : LinuxTV Developers
+
+This documentation is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the Free
+Software Foundation version 2 of the License.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+For more details see the file COPYING in the source distribution of Linux.
+
+.. only:: html
+
+   .. class:: toc-title
+
+        Table of Contents
+
+.. toctree::
+	:maxdepth: 5
+	:numbered:
+
+	cx2341x-uapi
+	imx-uapi
+	max2175
+	meye-uapi
+	omap3isp-uapi
+	uvcvideo
diff --git a/Documentation/userspace-api/media/drivers/max2175.rst b/Documentation/userspace-api/media/drivers/max2175.rst
new file mode 100644
index 000000000..35d3c4b41
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/max2175.rst
@@ -0,0 +1,64 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Maxim Integrated MAX2175 RF to bits tuner driver
+================================================
+
+The MAX2175 driver implements the following driver-specific controls:
+
+``V4L2_CID_MAX2175_I2S_ENABLE``
+-------------------------------
+    Enable/Disable I2S output of the tuner. This is a private control
+    that can be accessed only using the subdev interface.
+    Refer to Documentation/driver-api/media/v4l2-controls.rst for more details.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 4
+
+    * - ``(0)``
+      - I2S output is disabled.
+    * - ``(1)``
+      - I2S output is enabled.
+
+``V4L2_CID_MAX2175_HSLS``
+-------------------------
+    The high-side/low-side (HSLS) control of the tuner for a given band.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 4
+
+    * - ``(0)``
+      - The LO frequency position is below the desired frequency.
+    * - ``(1)``
+      - The LO frequency position is above the desired frequency.
+
+``V4L2_CID_MAX2175_RX_MODE (menu)``
+-----------------------------------
+    The Rx mode controls a number of preset parameters of the tuner like
+    sample clock (sck), sampling rate etc. These multiple settings are
+    provided under one single label called Rx mode in the datasheet. The
+    list below shows the supported modes with a brief description.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 4
+
+    * - ``"Europe modes"``
+    * - ``"FM 1.2" (0)``
+      - This configures FM band with a sample rate of 0.512 million
+        samples/sec with a 10.24 MHz sck.
+    * - ``"DAB 1.2" (1)``
+      - This configures VHF band with a sample rate of 2.048 million
+        samples/sec with a 32.768 MHz sck.
+
+    * - ``"North America modes"``
+    * - ``"FM 1.0" (0)``
+      - This configures FM band with a sample rate of 0.7441875 million
+        samples/sec with a 14.88375 MHz sck.
+    * - ``"DAB 1.2" (1)``
+      - This configures FM band with a sample rate of 0.372 million
+        samples/sec with a 7.441875 MHz sck.
diff --git a/Documentation/userspace-api/media/drivers/meye-uapi.rst b/Documentation/userspace-api/media/drivers/meye-uapi.rst
new file mode 100644
index 000000000..66b1c142f
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/meye-uapi.rst
@@ -0,0 +1,53 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: <isonum.txt>
+
+Vaio Picturebook Motion Eye Camera Driver
+=========================================
+
+Copyright |copy| 2001-2004 Stelian Pop <stelian@popies.net>
+
+Copyright |copy| 2001-2002 Alcôve <www.alcove.com>
+
+Copyright |copy| 2000 Andrew Tridgell <tridge@samba.org>
+
+Private API
+-----------
+
+The driver supports frame grabbing with the video4linux API,
+so all video4linux tools (like xawtv) should work with this driver.
+
+Besides the video4linux interface, the driver has a private interface
+for accessing the Motion Eye extended parameters (camera sharpness,
+agc, video framerate), the snapshot and the MJPEG capture facilities.
+
+This interface consists of several ioctls (prototypes and structures
+can be found in include/linux/meye.h):
+
+MEYEIOC_G_PARAMS and MEYEIOC_S_PARAMS
+	Get and set the extended parameters of the motion eye camera.
+	The user should always query the current parameters with
+	MEYEIOC_G_PARAMS, change what he likes and then issue the
+	MEYEIOC_S_PARAMS call (checking for -EINVAL). The extended
+	parameters are described by the meye_params structure.
+
+
+MEYEIOC_QBUF_CAPT
+	Queue a buffer for capture (the buffers must have been
+	obtained with a VIDIOCGMBUF call and mmap'ed by the
+	application). The argument to MEYEIOC_QBUF_CAPT is the
+	buffer number to queue (or -1 to end capture). The first
+	call to MEYEIOC_QBUF_CAPT starts the streaming capture.
+
+MEYEIOC_SYNC
+	Takes as an argument the buffer number you want to sync.
+	This ioctl blocks until the buffer is filled and ready
+	for the application to use. It returns the buffer size.
+
+MEYEIOC_STILLCAPT and MEYEIOC_STILLJCAPT
+	Takes a snapshot in an uncompressed or compressed jpeg format.
+	This ioctl blocks until the snapshot is done and returns (for
+	jpeg snapshot) the size of the image. The image data is
+	available from the first mmap'ed buffer.
+
+Look at the 'motioneye' application code for an actual example.
diff --git a/Documentation/userspace-api/media/drivers/omap3isp-uapi.rst b/Documentation/userspace-api/media/drivers/omap3isp-uapi.rst
new file mode 100644
index 000000000..5f966a874
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/omap3isp-uapi.rst
@@ -0,0 +1,208 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: <isonum.txt>
+
+OMAP 3 Image Signal Processor (ISP) driver
+==========================================
+
+Copyright |copy| 2010 Nokia Corporation
+
+Copyright |copy| 2009 Texas Instruments, Inc.
+
+Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
+Sakari Ailus <sakari.ailus@iki.fi>, David Cohen <dacohen@gmail.com>
+
+
+Events
+------
+
+The OMAP 3 ISP driver does support the V4L2 event interface on CCDC and
+statistics (AEWB, AF and histogram) subdevs.
+
+The CCDC subdev produces V4L2_EVENT_FRAME_SYNC type event on HS_VS
+interrupt which is used to signal frame start. Earlier version of this
+driver used V4L2_EVENT_OMAP3ISP_HS_VS for this purpose. The event is
+triggered exactly when the reception of the first line of the frame starts
+in the CCDC module. The event can be subscribed on the CCDC subdev.
+
+(When using parallel interface one must pay account to correct configuration
+of the VS signal polarity. This is automatically correct when using the serial
+receivers.)
+
+Each of the statistics subdevs is able to produce events. An event is
+generated whenever a statistics buffer can be dequeued by a user space
+application using the VIDIOC_OMAP3ISP_STAT_REQ IOCTL. The events available
+are:
+
+- V4L2_EVENT_OMAP3ISP_AEWB
+- V4L2_EVENT_OMAP3ISP_AF
+- V4L2_EVENT_OMAP3ISP_HIST
+
+The type of the event data is struct omap3isp_stat_event_status for these
+ioctls. If there is an error calculating the statistics, there will be an
+event as usual, but no related statistics buffer. In this case
+omap3isp_stat_event_status.buf_err is set to non-zero.
+
+
+Private IOCTLs
+--------------
+
+The OMAP 3 ISP driver supports standard V4L2 IOCTLs and controls where
+possible and practical. Much of the functions provided by the ISP, however,
+does not fall under the standard IOCTLs --- gamma tables and configuration of
+statistics collection are examples of such.
+
+In general, there is a private ioctl for configuring each of the blocks
+containing hardware-dependent functions.
+
+The following private IOCTLs are supported:
+
+- VIDIOC_OMAP3ISP_CCDC_CFG
+- VIDIOC_OMAP3ISP_PRV_CFG
+- VIDIOC_OMAP3ISP_AEWB_CFG
+- VIDIOC_OMAP3ISP_HIST_CFG
+- VIDIOC_OMAP3ISP_AF_CFG
+- VIDIOC_OMAP3ISP_STAT_REQ
+- VIDIOC_OMAP3ISP_STAT_EN
+
+The parameter structures used by these ioctls are described in
+include/linux/omap3isp.h. The detailed functions of the ISP itself related to
+a given ISP block is described in the Technical Reference Manuals (TRMs) ---
+see the end of the document for those.
+
+While it is possible to use the ISP driver without any use of these private
+IOCTLs it is not possible to obtain optimal image quality this way. The AEWB,
+AF and histogram modules cannot be used without configuring them using the
+appropriate private IOCTLs.
+
+
+CCDC and preview block IOCTLs
+-----------------------------
+
+The VIDIOC_OMAP3ISP_CCDC_CFG and VIDIOC_OMAP3ISP_PRV_CFG IOCTLs are used to
+configure, enable and disable functions in the CCDC and preview blocks,
+respectively. Both IOCTLs control several functions in the blocks they
+control. VIDIOC_OMAP3ISP_CCDC_CFG IOCTL accepts a pointer to struct
+omap3isp_ccdc_update_config as its argument. Similarly VIDIOC_OMAP3ISP_PRV_CFG
+accepts a pointer to struct omap3isp_prev_update_config. The definition of
+both structures is available in [#]_.
+
+The update field in the structures tells whether to update the configuration
+for the specific function and the flag tells whether to enable or disable the
+function.
+
+The update and flag bit masks accept the following values. Each separate
+functions in the CCDC and preview blocks is associated with a flag (either
+disable or enable; part of the flag field in the structure) and a pointer to
+configuration data for the function.
+
+Valid values for the update and flag fields are listed here for
+VIDIOC_OMAP3ISP_CCDC_CFG. Values may be or'ed to configure more than one
+function in the same IOCTL call.
+
+- OMAP3ISP_CCDC_ALAW
+- OMAP3ISP_CCDC_LPF
+- OMAP3ISP_CCDC_BLCLAMP
+- OMAP3ISP_CCDC_BCOMP
+- OMAP3ISP_CCDC_FPC
+- OMAP3ISP_CCDC_CULL
+- OMAP3ISP_CCDC_CONFIG_LSC
+- OMAP3ISP_CCDC_TBL_LSC
+
+The corresponding values for the VIDIOC_OMAP3ISP_PRV_CFG are here:
+
+- OMAP3ISP_PREV_LUMAENH
+- OMAP3ISP_PREV_INVALAW
+- OMAP3ISP_PREV_HRZ_MED
+- OMAP3ISP_PREV_CFA
+- OMAP3ISP_PREV_CHROMA_SUPP
+- OMAP3ISP_PREV_WB
+- OMAP3ISP_PREV_BLKADJ
+- OMAP3ISP_PREV_RGB2RGB
+- OMAP3ISP_PREV_COLOR_CONV
+- OMAP3ISP_PREV_YC_LIMIT
+- OMAP3ISP_PREV_DEFECT_COR
+- OMAP3ISP_PREV_GAMMABYPASS
+- OMAP3ISP_PREV_DRK_FRM_CAPTURE
+- OMAP3ISP_PREV_DRK_FRM_SUBTRACT
+- OMAP3ISP_PREV_LENS_SHADING
+- OMAP3ISP_PREV_NF
+- OMAP3ISP_PREV_GAMMA
+
+The associated configuration pointer for the function may not be NULL when
+enabling the function. When disabling a function the configuration pointer is
+ignored.
+
+
+Statistic blocks IOCTLs
+-----------------------
+
+The statistics subdevs do offer more dynamic configuration options than the
+other subdevs. They can be enabled, disable and reconfigured when the pipeline
+is in streaming state.
+
+The statistics blocks always get the input image data from the CCDC (as the
+histogram memory read isn't implemented). The statistics are dequeueable by
+the user from the statistics subdev nodes using private IOCTLs.
+
+The private IOCTLs offered by the AEWB, AF and histogram subdevs are heavily
+reflected by the register level interface offered by the ISP hardware. There
+are aspects that are purely related to the driver implementation and these are
+discussed next.
+
+VIDIOC_OMAP3ISP_STAT_EN
+-----------------------
+
+This private IOCTL enables/disables a statistic module. If this request is
+done before streaming, it will take effect as soon as the pipeline starts to
+stream.  If the pipeline is already streaming, it will take effect as soon as
+the CCDC becomes idle.
+
+VIDIOC_OMAP3ISP_AEWB_CFG, VIDIOC_OMAP3ISP_HIST_CFG and VIDIOC_OMAP3ISP_AF_CFG
+-----------------------------------------------------------------------------
+
+Those IOCTLs are used to configure the modules. They require user applications
+to have an in-depth knowledge of the hardware. Most of the fields explanation
+can be found on OMAP's TRMs. The two following fields common to all the above
+configure private IOCTLs require explanation for better understanding as they
+are not part of the TRM.
+
+omap3isp_[h3a_af/h3a_aewb/hist]\_config.buf_size:
+
+The modules handle their buffers internally. The necessary buffer size for the
+module's data output depends on the requested configuration. Although the
+driver supports reconfiguration while streaming, it does not support a
+reconfiguration which requires bigger buffer size than what is already
+internally allocated if the module is enabled. It will return -EBUSY on this
+case. In order to avoid such condition, either disable/reconfigure/enable the
+module or request the necessary buffer size during the first configuration
+while the module is disabled.
+
+The internal buffer size allocation considers the requested configuration's
+minimum buffer size and the value set on buf_size field. If buf_size field is
+out of [minimum, maximum] buffer size range, it's clamped to fit in there.
+The driver then selects the biggest value. The corrected buf_size value is
+written back to user application.
+
+omap3isp_[h3a_af/h3a_aewb/hist]\_config.config_counter:
+
+As the configuration doesn't take effect synchronously to the request, the
+driver must provide a way to track this information to provide more accurate
+data. After a configuration is requested, the config_counter returned to user
+space application will be an unique value associated to that request. When
+user application receives an event for buffer availability or when a new
+buffer is requested, this config_counter is used to match a buffer data and a
+configuration.
+
+VIDIOC_OMAP3ISP_STAT_REQ
+------------------------
+
+Send to user space the oldest data available in the internal buffer queue and
+discards such buffer afterwards. The field omap3isp_stat_data.frame_number
+matches with the video buffer's field_count.
+
+
+References
+----------
+
+.. [#] include/linux/omap3isp.h
diff --git a/Documentation/userspace-api/media/drivers/uvcvideo.rst b/Documentation/userspace-api/media/drivers/uvcvideo.rst
new file mode 100644
index 000000000..e5fd8fad3
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/uvcvideo.rst
@@ -0,0 +1,257 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+The Linux USB Video Class (UVC) driver
+======================================
+
+This file documents some driver-specific aspects of the UVC driver, such as
+driver-specific ioctls and implementation notes.
+
+Questions and remarks can be sent to the Linux UVC development mailing list at
+linux-uvc-devel@lists.berlios.de.
+
+
+Extension Unit (XU) support
+---------------------------
+
+Introduction
+~~~~~~~~~~~~
+
+The UVC specification allows for vendor-specific extensions through extension
+units (XUs). The Linux UVC driver supports extension unit controls (XU controls)
+through two separate mechanisms:
+
+  - through mappings of XU controls to V4L2 controls
+  - through a driver-specific ioctl interface
+
+The first one allows generic V4L2 applications to use XU controls by mapping
+certain XU controls onto V4L2 controls, which then show up during ordinary
+control enumeration.
+
+The second mechanism requires uvcvideo-specific knowledge for the application to
+access XU controls but exposes the entire UVC XU concept to user space for
+maximum flexibility.
+
+Both mechanisms complement each other and are described in more detail below.
+
+
+Control mappings
+~~~~~~~~~~~~~~~~
+
+The UVC driver provides an API for user space applications to define so-called
+control mappings at runtime. These allow for individual XU controls or byte
+ranges thereof to be mapped to new V4L2 controls. Such controls appear and
+function exactly like normal V4L2 controls (i.e. the stock controls, such as
+brightness, contrast, etc.). However, reading or writing of such a V4L2 controls
+triggers a read or write of the associated XU control.
+
+The ioctl used to create these control mappings is called UVCIOC_CTRL_MAP.
+Previous driver versions (before 0.2.0) required another ioctl to be used
+beforehand (UVCIOC_CTRL_ADD) to pass XU control information to the UVC driver.
+This is no longer necessary as newer uvcvideo versions query the information
+directly from the device.
+
+For details on the UVCIOC_CTRL_MAP ioctl please refer to the section titled
+"IOCTL reference" below.
+
+
+3. Driver specific XU control interface
+
+For applications that need to access XU controls directly, e.g. for testing
+purposes, firmware upload, or accessing binary controls, a second mechanism to
+access XU controls is provided in the form of a driver-specific ioctl, namely
+UVCIOC_CTRL_QUERY.
+
+A call to this ioctl allows applications to send queries to the UVC driver that
+directly map to the low-level UVC control requests.
+
+In order to make such a request the UVC unit ID of the control's extension unit
+and the control selector need to be known. This information either needs to be
+hardcoded in the application or queried using other ways such as by parsing the
+UVC descriptor or, if available, using the media controller API to enumerate a
+device's entities.
+
+Unless the control size is already known it is necessary to first make a
+UVC_GET_LEN requests in order to be able to allocate a sufficiently large buffer
+and set the buffer size to the correct value. Similarly, to find out whether
+UVC_GET_CUR or UVC_SET_CUR are valid requests for a given control, a
+UVC_GET_INFO request should be made. The bits 0 (GET supported) and 1 (SET
+supported) of the resulting byte indicate which requests are valid.
+
+With the addition of the UVCIOC_CTRL_QUERY ioctl the UVCIOC_CTRL_GET and
+UVCIOC_CTRL_SET ioctls have become obsolete since their functionality is a
+subset of the former ioctl. For the time being they are still supported but
+application developers are encouraged to use UVCIOC_CTRL_QUERY instead.
+
+For details on the UVCIOC_CTRL_QUERY ioctl please refer to the section titled
+"IOCTL reference" below.
+
+
+Security
+~~~~~~~~
+
+The API doesn't currently provide a fine-grained access control facility. The
+UVCIOC_CTRL_ADD and UVCIOC_CTRL_MAP ioctls require super user permissions.
+
+Suggestions on how to improve this are welcome.
+
+
+Debugging
+~~~~~~~~~
+
+In order to debug problems related to XU controls or controls in general it is
+recommended to enable the UVC_TRACE_CONTROL bit in the module parameter 'trace'.
+This causes extra output to be written into the system log.
+
+
+IOCTL reference
+~~~~~~~~~~~~~~~
+
+UVCIOC_CTRL_MAP - Map a UVC control to a V4L2 control
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Argument: struct uvc_xu_control_mapping
+
+**Description**:
+
+	This ioctl creates a mapping between a UVC control or part of a UVC
+	control and a V4L2 control. Once mappings are defined, userspace
+	applications can access vendor-defined UVC control through the V4L2
+	control API.
+
+	To create a mapping, applications fill the uvc_xu_control_mapping
+	structure with information about an existing UVC control defined with
+	UVCIOC_CTRL_ADD and a new V4L2 control.
+
+	A UVC control can be mapped to several V4L2 controls. For instance,
+	a UVC pan/tilt control could be mapped to separate pan and tilt V4L2
+	controls. The UVC control is divided into non overlapping fields using
+	the 'size' and 'offset' fields and are then independently mapped to
+	V4L2 control.
+
+	For signed integer V4L2 controls the data_type field should be set to
+	UVC_CTRL_DATA_TYPE_SIGNED. Other values are currently ignored.
+
+**Return value**:
+
+	On success 0 is returned. On error -1 is returned and errno is set
+	appropriately.
+
+	ENOMEM
+		Not enough memory to perform the operation.
+	EPERM
+		Insufficient privileges (super user privileges are required).
+	EINVAL
+		No such UVC control.
+	EOVERFLOW
+		The requested offset and size would overflow the UVC control.
+	EEXIST
+		Mapping already exists.
+
+**Data types**:
+
+.. code-block:: none
+
+	* struct uvc_xu_control_mapping
+
+	__u32	id		V4L2 control identifier
+	__u8	name[32]	V4L2 control name
+	__u8	entity[16]	UVC extension unit GUID
+	__u8	selector	UVC control selector
+	__u8	size		V4L2 control size (in bits)
+	__u8	offset		V4L2 control offset (in bits)
+	enum v4l2_ctrl_type
+		v4l2_type	V4L2 control type
+	enum uvc_control_data_type
+		data_type	UVC control data type
+	struct uvc_menu_info
+		*menu_info	Array of menu entries (for menu controls only)
+	__u32	menu_count	Number of menu entries (for menu controls only)
+
+	* struct uvc_menu_info
+
+	__u32	value		Menu entry value used by the device
+	__u8	name[32]	Menu entry name
+
+
+	* enum uvc_control_data_type
+
+	UVC_CTRL_DATA_TYPE_RAW		Raw control (byte array)
+	UVC_CTRL_DATA_TYPE_SIGNED	Signed integer
+	UVC_CTRL_DATA_TYPE_UNSIGNED	Unsigned integer
+	UVC_CTRL_DATA_TYPE_BOOLEAN	Boolean
+	UVC_CTRL_DATA_TYPE_ENUM		Enumeration
+	UVC_CTRL_DATA_TYPE_BITMASK	Bitmask
+
+
+UVCIOC_CTRL_QUERY - Query a UVC XU control
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Argument: struct uvc_xu_control_query
+
+**Description**:
+
+	This ioctl queries a UVC XU control identified by its extension unit ID
+	and control selector.
+
+	There are a number of different queries available that closely
+	correspond to the low-level control requests described in the UVC
+	specification. These requests are:
+
+	UVC_GET_CUR
+		Obtain the current value of the control.
+	UVC_GET_MIN
+		Obtain the minimum value of the control.
+	UVC_GET_MAX
+		Obtain the maximum value of the control.
+	UVC_GET_DEF
+		Obtain the default value of the control.
+	UVC_GET_RES
+		Query the resolution of the control, i.e. the step size of the
+		allowed control values.
+	UVC_GET_LEN
+		Query the size of the control in bytes.
+	UVC_GET_INFO
+		Query the control information bitmap, which indicates whether
+		get/set requests are supported.
+	UVC_SET_CUR
+		Update the value of the control.
+
+	Applications must set the 'size' field to the correct length for the
+	control. Exceptions are the UVC_GET_LEN and UVC_GET_INFO queries, for
+	which the size must be set to 2 and 1, respectively. The 'data' field
+	must point to a valid writable buffer big enough to hold the indicated
+	number of data bytes.
+
+	Data is copied directly from the device without any driver-side
+	processing. Applications are responsible for data buffer formatting,
+	including little-endian/big-endian conversion. This is particularly
+	important for the result of the UVC_GET_LEN requests, which is always
+	returned as a little-endian 16-bit integer by the device.
+
+**Return value**:
+
+	On success 0 is returned. On error -1 is returned and errno is set
+	appropriately.
+
+	ENOENT
+		The device does not support the given control or the specified
+		extension unit could not be found.
+	ENOBUFS
+		The specified buffer size is incorrect (too big or too small).
+	EINVAL
+		An invalid request code was passed.
+	EBADRQC
+		The given request is not supported by the given control.
+	EFAULT
+		The data pointer references an inaccessible memory area.
+
+**Data types**:
+
+.. code-block:: none
+
+	* struct uvc_xu_control_query
+
+	__u8	unit		Extension unit ID
+	__u8	selector	Control selector
+	__u8	query		Request code to send to the device
+	__u16	size		Control data size (in bytes)
+	__u8	*data		Control value
diff --git a/Documentation/userspace-api/media/dvb/audio-bilingual-channel-select.rst b/Documentation/userspace-api/media/dvb/audio-bilingual-channel-select.rst
new file mode 100644
index 000000000..33b536331
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-bilingual-channel-select.rst
@@ -0,0 +1,58 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_BILINGUAL_CHANNEL_SELECT:
+
+==============================
+AUDIO_BILINGUAL_CHANNEL_SELECT
+==============================
+
+Name
+----
+
+AUDIO_BILINGUAL_CHANNEL_SELECT
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_BILINGUAL_CHANNEL_SELECT
+
+``int ioctl(int fd, AUDIO_BILINGUAL_CHANNEL_SELECT, struct audio_channel_select *select)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  audio_channel_select_t ch
+
+       -  Select the output format of the audio (mono left/right, stereo).
+
+Description
+-----------
+
+This ioctl is obsolete. Do not use in new drivers. It has been replaced
+by the V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK`` control
+for MPEG decoders controlled through V4L2.
+
+This ioctl call asks the Audio Device to select the requested channel
+for bilingual streams if possible.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-channel-select.rst b/Documentation/userspace-api/media/dvb/audio-channel-select.rst
new file mode 100644
index 000000000..74093df92
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-channel-select.rst
@@ -0,0 +1,57 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_CHANNEL_SELECT:
+
+====================
+AUDIO_CHANNEL_SELECT
+====================
+
+Name
+----
+
+AUDIO_CHANNEL_SELECT
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_CHANNEL_SELECT
+
+``int ioctl(int fd, AUDIO_CHANNEL_SELECT, struct audio_channel_select *select)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  audio_channel_select_t ch
+
+       -  Select the output format of the audio (mono left/right, stereo).
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. To control a V4L2 decoder use the
+V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead.
+
+This ioctl call asks the Audio Device to select the requested channel if
+possible.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-clear-buffer.rst b/Documentation/userspace-api/media/dvb/audio-clear-buffer.rst
new file mode 100644
index 000000000..a0ebb0278
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-clear-buffer.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_CLEAR_BUFFER:
+
+==================
+AUDIO_CLEAR_BUFFER
+==================
+
+Name
+----
+
+AUDIO_CLEAR_BUFFER
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_CLEAR_BUFFER
+
+``int ioctl(int fd, AUDIO_CLEAR_BUFFER)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+Description
+-----------
+
+This ioctl call asks the Audio Device to clear all software and hardware
+buffers of the audio decoder device.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-continue.rst b/Documentation/userspace-api/media/dvb/audio-continue.rst
new file mode 100644
index 000000000..a2e9850f3
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-continue.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_CONTINUE:
+
+==============
+AUDIO_CONTINUE
+==============
+
+Name
+----
+
+AUDIO_CONTINUE
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_CONTINUE
+
+``int ioctl(int fd, AUDIO_CONTINUE)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+Description
+-----------
+
+This ioctl restarts the decoding and playing process previously paused
+with AUDIO_PAUSE command.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-fclose.rst b/Documentation/userspace-api/media/dvb/audio-fclose.rst
new file mode 100644
index 000000000..77857d578
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-fclose.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _audio_fclose:
+
+========================
+Digital TV audio close()
+========================
+
+Name
+----
+
+Digital TV audio close()
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:function:: int close(int fd)
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+Description
+-----------
+
+This system call closes a previously opened audio device.
+
+Return Value
+------------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EBADF``
+
+       -  fd is not a valid open file descriptor.
diff --git a/Documentation/userspace-api/media/dvb/audio-fopen.rst b/Documentation/userspace-api/media/dvb/audio-fopen.rst
new file mode 100644
index 000000000..774daaab3
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-fopen.rst
@@ -0,0 +1,103 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _audio_fopen:
+
+=======================
+Digital TV audio open()
+=======================
+
+Name
+----
+
+Digital TV audio open()
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:function:: int open(const char *deviceName, int flags)
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  const char \*deviceName
+
+       -  Name of specific audio device.
+
+    -  .. row 2
+
+       -  int flags
+
+       -  A bit-wise OR of the following flags:
+
+    -  .. row 3
+
+       -
+       -  O_RDONLY read-only access
+
+    -  .. row 4
+
+       -
+       -  O_RDWR read/write access
+
+    -  .. row 5
+
+       -
+       -  O_NONBLOCK open in non-blocking mode
+
+    -  .. row 6
+
+       -
+       -  (blocking mode is the default)
+
+Description
+-----------
+
+This system call opens a named audio device (e.g.
+/dev/dvb/adapter0/audio0) for subsequent use. When an open() call has
+succeeded, the device will be ready for use. The significance of
+blocking or non-blocking mode is described in the documentation for
+functions where there is a difference. It does not affect the semantics
+of the open() call itself. A device opened in blocking mode can later be
+put into non-blocking mode (and vice versa) using the F_SETFL command
+of the fcntl system call. This is a standard system call, documented in
+the Linux manual page for fcntl. Only one user can open the Audio Device
+in O_RDWR mode. All other attempts to open the device in this mode will
+fail, and an error code will be returned. If the Audio Device is opened
+in O_RDONLY mode, the only ioctl call that can be used is
+AUDIO_GET_STATUS. All other call will return with an error code.
+
+Return Value
+------------
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``ENODEV``
+
+       -  Device driver not loaded/available.
+
+    -  .. row 2
+
+       -  ``EBUSY``
+
+       -  Device or resource busy.
+
+    -  .. row 3
+
+       -  ``EINVAL``
+
+       -  Invalid argument.
diff --git a/Documentation/userspace-api/media/dvb/audio-fwrite.rst b/Documentation/userspace-api/media/dvb/audio-fwrite.rst
new file mode 100644
index 000000000..7b096ac2b
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-fwrite.rst
@@ -0,0 +1,79 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _audio_fwrite:
+
+=========================
+Digital TV audio write()
+=========================
+
+Name
+----
+
+Digital TV audio write()
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:function:: size_t write(int fd, const void *buf, size_t count)
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  void \*buf
+
+       -  Pointer to the buffer containing the PES data.
+
+    -  .. row 3
+
+       -  size_t count
+
+       -  Size of buf.
+
+Description
+-----------
+
+This system call can only be used if AUDIO_SOURCE_MEMORY is selected
+in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in
+PES format. If O_NONBLOCK is not specified the function will block
+until buffer space is available. The amount of data to be transferred is
+implied by count.
+
+Return Value
+------------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EPERM``
+
+       -  Mode AUDIO_SOURCE_MEMORY not selected.
+
+    -  .. row 2
+
+       -  ``ENOMEM``
+
+       -  Attempted to write more data than the internal buffer can hold.
+
+    -  .. row 3
+
+       -  ``EBADF``
+
+       -  fd is not a valid open file descriptor.
diff --git a/Documentation/userspace-api/media/dvb/audio-get-capabilities.rst b/Documentation/userspace-api/media/dvb/audio-get-capabilities.rst
new file mode 100644
index 000000000..6d9eb71da
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-get-capabilities.rst
@@ -0,0 +1,54 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_GET_CAPABILITIES:
+
+======================
+AUDIO_GET_CAPABILITIES
+======================
+
+Name
+----
+
+AUDIO_GET_CAPABILITIES
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_GET_CAPABILITIES
+
+``int ioctl(int fd, AUDIO_GET_CAPABILITIES, unsigned int *cap)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  unsigned int \*cap
+
+       -  Returns a bit array of supported sound formats.
+
+Description
+-----------
+
+This ioctl call asks the Audio Device to tell us about the decoding
+capabilities of the audio hardware.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-get-status.rst b/Documentation/userspace-api/media/dvb/audio-get-status.rst
new file mode 100644
index 000000000..7ae8db2e6
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-get-status.rst
@@ -0,0 +1,54 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_GET_STATUS:
+
+================
+AUDIO_GET_STATUS
+================
+
+Name
+----
+
+AUDIO_GET_STATUS
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_GET_STATUS
+
+``int ioctl(int fd, AUDIO_GET_STATUS, struct audio_status *status)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  struct audio_status \*status
+
+       -  Returns the current state of Audio Device.
+
+Description
+-----------
+
+This ioctl call asks the Audio Device to return the current state of the
+Audio Device.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-pause.rst b/Documentation/userspace-api/media/dvb/audio-pause.rst
new file mode 100644
index 000000000..d37d1ddce
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-pause.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_PAUSE:
+
+===========
+AUDIO_PAUSE
+===========
+
+Name
+----
+
+AUDIO_PAUSE
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_PAUSE
+
+``int ioctl(int fd, AUDIO_PAUSE)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+Description
+-----------
+
+This ioctl call suspends the audio stream being played. Decoding and
+playing are paused. It is then possible to restart again decoding and
+playing process of the audio stream using AUDIO_CONTINUE command.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-play.rst b/Documentation/userspace-api/media/dvb/audio-play.rst
new file mode 100644
index 000000000..e591930b6
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-play.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_PLAY:
+
+==========
+AUDIO_PLAY
+==========
+
+Name
+----
+
+AUDIO_PLAY
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_PLAY
+
+``int ioctl(int fd, AUDIO_PLAY)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+Description
+-----------
+
+This ioctl call asks the Audio Device to start playing an audio stream
+from the selected source.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-select-source.rst b/Documentation/userspace-api/media/dvb/audio-select-source.rst
new file mode 100644
index 000000000..6a0c0f365
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-select-source.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_SELECT_SOURCE:
+
+===================
+AUDIO_SELECT_SOURCE
+===================
+
+Name
+----
+
+AUDIO_SELECT_SOURCE
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_SELECT_SOURCE
+
+``int ioctl(int fd, AUDIO_SELECT_SOURCE, struct audio_stream_source *source)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  audio_stream_source_t source
+
+       -  Indicates the source that shall be used for the Audio stream.
+
+Description
+-----------
+
+This ioctl call informs the audio device which source shall be used for
+the input data. The possible sources are demux or memory. If
+AUDIO_SOURCE_MEMORY is selected, the data is fed to the Audio Device
+through the write command.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-set-av-sync.rst b/Documentation/userspace-api/media/dvb/audio-set-av-sync.rst
new file mode 100644
index 000000000..85a8016bf
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-set-av-sync.rst
@@ -0,0 +1,58 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_SET_AV_SYNC:
+
+=================
+AUDIO_SET_AV_SYNC
+=================
+
+Name
+----
+
+AUDIO_SET_AV_SYNC
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_SET_AV_SYNC
+
+``int ioctl(int fd, AUDIO_SET_AV_SYNC, boolean state)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  boolean state
+
+       -  Tells the Digital TV subsystem if A/V synchronization shall be ON or OFF.
+
+          TRUE: AV-sync ON
+
+          FALSE: AV-sync OFF
+
+Description
+-----------
+
+This ioctl call asks the Audio Device to turn ON or OFF A/V
+synchronization.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-set-bypass-mode.rst b/Documentation/userspace-api/media/dvb/audio-set-bypass-mode.rst
new file mode 100644
index 000000000..ecac02f1b
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-set-bypass-mode.rst
@@ -0,0 +1,62 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_SET_BYPASS_MODE:
+
+=====================
+AUDIO_SET_BYPASS_MODE
+=====================
+
+Name
+----
+
+AUDIO_SET_BYPASS_MODE
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_SET_BYPASS_MODE
+
+``int ioctl(int fd, AUDIO_SET_BYPASS_MODE, boolean mode)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  boolean mode
+
+       -  Enables or disables the decoding of the current Audio stream in
+	  the Digital TV subsystem.
+
+          TRUE: Bypass is disabled
+
+          FALSE: Bypass is enabled
+
+Description
+-----------
+
+This ioctl call asks the Audio Device to bypass the Audio decoder and
+forward the stream without decoding. This mode shall be used if streams
+that can’t be handled by the Digital TV system shall be decoded. Dolby
+DigitalTM streams are automatically forwarded by the Digital TV subsystem if
+the hardware can handle it.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-set-id.rst b/Documentation/userspace-api/media/dvb/audio-set-id.rst
new file mode 100644
index 000000000..39ad846d4
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-set-id.rst
@@ -0,0 +1,59 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_SET_ID:
+
+============
+AUDIO_SET_ID
+============
+
+Name
+----
+
+AUDIO_SET_ID
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_SET_ID
+
+``int ioctl(int fd, AUDIO_SET_ID, int id)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  int id
+
+       -  audio sub-stream id
+
+Description
+-----------
+
+This ioctl selects which sub-stream is to be decoded if a program or
+system stream is sent to the video device. If no audio stream type is
+set the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for
+AC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for
+other stream types. If the stream type is set the id just specifies the
+substream id of the audio stream and only the first 5 bits are
+recognized.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-set-mixer.rst b/Documentation/userspace-api/media/dvb/audio-set-mixer.rst
new file mode 100644
index 000000000..45dbdf480
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-set-mixer.rst
@@ -0,0 +1,53 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_SET_MIXER:
+
+===============
+AUDIO_SET_MIXER
+===============
+
+Name
+----
+
+AUDIO_SET_MIXER
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_SET_MIXER
+
+``int ioctl(int fd, AUDIO_SET_MIXER, struct audio_mixer *mix)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  audio_mixer_t \*mix
+
+       -  mixer settings.
+
+Description
+-----------
+
+This ioctl lets you adjust the mixer settings of the audio decoder.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-set-mute.rst b/Documentation/userspace-api/media/dvb/audio-set-mute.rst
new file mode 100644
index 000000000..987751f92
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-set-mute.rst
@@ -0,0 +1,62 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_SET_MUTE:
+
+==============
+AUDIO_SET_MUTE
+==============
+
+Name
+----
+
+AUDIO_SET_MUTE
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_SET_MUTE
+
+``int ioctl(int fd, AUDIO_SET_MUTE, boolean state)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  boolean state
+
+       -  Indicates if audio device shall mute or not.
+
+          TRUE: Audio Mute
+
+          FALSE: Audio Un-mute
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. To control a V4L2 decoder use the
+V4L2 :ref:`VIDIOC_DECODER_CMD` with the
+``V4L2_DEC_CMD_START_MUTE_AUDIO`` flag instead.
+
+This ioctl call asks the audio device to mute the stream that is
+currently being played.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio-set-streamtype.rst b/Documentation/userspace-api/media/dvb/audio-set-streamtype.rst
new file mode 100644
index 000000000..77d73c748
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-set-streamtype.rst
@@ -0,0 +1,66 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_SET_STREAMTYPE:
+
+====================
+AUDIO_SET_STREAMTYPE
+====================
+
+Name
+----
+
+AUDIO_SET_STREAMTYPE
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_SET_STREAMTYPE
+
+``int ioctl(fd, AUDIO_SET_STREAMTYPE, int type)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -
+
+       -  int type
+
+       -  stream type
+
+Description
+-----------
+
+This ioctl tells the driver which kind of audio stream to expect. This
+is useful if the stream offers several audio sub-streams like LPCM and
+AC3.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EINVAL``
+
+       -  type is not a valid or supported stream type.
diff --git a/Documentation/userspace-api/media/dvb/audio-stop.rst b/Documentation/userspace-api/media/dvb/audio-stop.rst
new file mode 100644
index 000000000..d77f786fd
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio-stop.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.audio
+
+.. _AUDIO_STOP:
+
+==========
+AUDIO_STOP
+==========
+
+Name
+----
+
+AUDIO_STOP
+
+.. attention:: This ioctl is deprecated
+
+Synopsis
+--------
+
+.. c:macro:: AUDIO_STOP
+
+``int ioctl(int fd, AUDIO_STOP)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+Description
+-----------
+
+This ioctl call asks the Audio Device to stop playing the current
+stream.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/audio.rst b/Documentation/userspace-api/media/dvb/audio.rst
new file mode 100644
index 000000000..071abac9d
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio.rst
@@ -0,0 +1,27 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dvb_audio:
+
+#######################
+Digital TV Audio Device
+#######################
+
+The Digital TV audio device controls the MPEG2 audio decoder of the Digital
+TV hardware. It can be accessed through ``/dev/dvb/adapter?/audio?``. Data
+types and and ioctl definitions can be accessed by including
+``linux/dvb/audio.h`` in your application.
+
+Please note that some Digital TV cards don’t have their own MPEG decoder, which
+results in the omission of the audio and video device.
+
+These ioctls were also used by V4L2 to control MPEG decoders implemented
+in V4L2. The use of these ioctls for that purpose has been made obsolete
+and proper V4L2 ioctls or controls have been created to replace that
+functionality.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    audio_data_types
+    audio_function_calls
diff --git a/Documentation/userspace-api/media/dvb/audio_data_types.rst b/Documentation/userspace-api/media/dvb/audio_data_types.rst
new file mode 100644
index 000000000..474452913
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio_data_types.rst
@@ -0,0 +1,116 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _audio_data_types:
+
+****************
+Audio Data Types
+****************
+
+This section describes the structures, data types and defines used when
+talking to the audio device.
+
+.. c:type:: audio_stream_source
+
+The audio stream source is set through the AUDIO_SELECT_SOURCE call
+and can take the following values, depending on whether we are replaying
+from an internal (demux) or external (user write) source.
+
+
+.. code-block:: c
+
+    typedef enum {
+	AUDIO_SOURCE_DEMUX,
+	AUDIO_SOURCE_MEMORY
+    } audio_stream_source_t;
+
+AUDIO_SOURCE_DEMUX selects the demultiplexer (fed either by the
+frontend or the DVR device) as the source of the video stream. If
+AUDIO_SOURCE_MEMORY is selected the stream comes from the application
+through the ``write()`` system call.
+
+
+.. c:type:: audio_play_state
+
+The following values can be returned by the AUDIO_GET_STATUS call
+representing the state of audio playback.
+
+
+.. code-block:: c
+
+    typedef enum {
+	AUDIO_STOPPED,
+	AUDIO_PLAYING,
+	AUDIO_PAUSED
+    } audio_play_state_t;
+
+
+.. c:type:: audio_channel_select
+
+The audio channel selected via AUDIO_CHANNEL_SELECT is determined by
+the following values.
+
+
+.. code-block:: c
+
+    typedef enum {
+	AUDIO_STEREO,
+	AUDIO_MONO_LEFT,
+	AUDIO_MONO_RIGHT,
+	AUDIO_MONO,
+	AUDIO_STEREO_SWAPPED
+    } audio_channel_select_t;
+
+
+.. c:type:: audio_status
+
+The AUDIO_GET_STATUS call returns the following structure informing
+about various states of the playback operation.
+
+
+.. code-block:: c
+
+    typedef struct audio_status {
+	boolean AV_sync_state;
+	boolean mute_state;
+	audio_play_state_t play_state;
+	audio_stream_source_t stream_source;
+	audio_channel_select_t channel_select;
+	boolean bypass_mode;
+	audio_mixer_t mixer_state;
+    } audio_status_t;
+
+
+.. c:type:: audio_mixer
+
+The following structure is used by the AUDIO_SET_MIXER call to set the
+audio volume.
+
+
+.. code-block:: c
+
+    typedef struct audio_mixer {
+	unsigned int volume_left;
+	unsigned int volume_right;
+    } audio_mixer_t;
+
+
+.. _audio_encodings:
+
+audio encodings
+===============
+
+A call to AUDIO_GET_CAPABILITIES returns an unsigned integer with the
+following bits set according to the hardwares capabilities.
+
+
+.. code-block:: c
+
+     #define AUDIO_CAP_DTS    1
+     #define AUDIO_CAP_LPCM   2
+     #define AUDIO_CAP_MP1    4
+     #define AUDIO_CAP_MP2    8
+     #define AUDIO_CAP_MP3   16
+     #define AUDIO_CAP_AAC   32
+     #define AUDIO_CAP_OGG   64
+     #define AUDIO_CAP_SDDS 128
+     #define AUDIO_CAP_AC3  256
diff --git a/Documentation/userspace-api/media/dvb/audio_function_calls.rst b/Documentation/userspace-api/media/dvb/audio_function_calls.rst
new file mode 100644
index 000000000..fa5ba9539
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/audio_function_calls.rst
@@ -0,0 +1,30 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _audio_function_calls:
+
+********************
+Audio Function Calls
+********************
+
+.. toctree::
+    :maxdepth: 1
+
+    audio-fopen
+    audio-fclose
+    audio-fwrite
+    audio-stop
+    audio-play
+    audio-pause
+    audio-continue
+    audio-select-source
+    audio-set-mute
+    audio-set-av-sync
+    audio-set-bypass-mode
+    audio-channel-select
+    audio-bilingual-channel-select
+    audio-get-status
+    audio-get-capabilities
+    audio-clear-buffer
+    audio-set-id
+    audio-set-mixer
+    audio-set-streamtype
diff --git a/Documentation/userspace-api/media/dvb/ca-fclose.rst b/Documentation/userspace-api/media/dvb/ca-fclose.rst
new file mode 100644
index 000000000..27f217a35
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-fclose.rst
@@ -0,0 +1,40 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _ca_fclose:
+
+=====================
+Digital TV CA close()
+=====================
+
+Name
+----
+
+Digital TV CA close()
+
+Synopsis
+--------
+
+.. c:function:: int close(int fd)
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+Description
+-----------
+
+This system call closes a previously opened CA device.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca-fopen.rst b/Documentation/userspace-api/media/dvb/ca-fopen.rst
new file mode 100644
index 000000000..7f99908ff
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-fopen.rst
@@ -0,0 +1,72 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _ca_fopen:
+
+====================
+Digital TV CA open()
+====================
+
+Name
+----
+
+Digital TV CA open()
+
+Synopsis
+--------
+
+.. c:function:: int open(const char *name, int flags)
+
+Arguments
+---------
+
+``name``
+  Name of specific Digital TV CA device.
+
+``flags``
+  A bit-wise OR of the following flags:
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  - ``O_RDONLY``
+       - read-only access
+
+    -  - ``O_RDWR``
+       - read/write access
+
+    -  - ``O_NONBLOCK``
+       - open in non-blocking mode
+         (blocking mode is the default)
+
+Description
+-----------
+
+This system call opens a named ca device (e.g. ``/dev/dvb/adapter?/ca?``)
+for subsequent use.
+
+When an ``open()`` call has succeeded, the device will be ready for use. The
+significance of blocking or non-blocking mode is described in the
+documentation for functions where there is a difference. It does not
+affect the semantics of the ``open()`` call itself. A device opened in
+blocking mode can later be put into non-blocking mode (and vice versa)
+using the ``F_SETFL`` command of the ``fcntl`` system call. This is a
+standard system call, documented in the Linux manual page for fcntl.
+Only one user can open the CA Device in ``O_RDWR`` mode. All other
+attempts to open the device in this mode will fail, and an error code
+will be returned.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca-get-cap.rst b/Documentation/userspace-api/media/dvb/ca-get-cap.rst
new file mode 100644
index 000000000..9b29513ee
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-get-cap.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_GET_CAP:
+
+==========
+CA_GET_CAP
+==========
+
+Name
+----
+
+CA_GET_CAP
+
+Synopsis
+--------
+
+.. c:macro:: CA_GET_CAP
+
+``int ioctl(fd, CA_GET_CAP, struct ca_caps *caps)``
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+``caps``
+  Pointer to struct :c:type:`ca_caps`.
+
+Description
+-----------
+
+Queries the Kernel for information about the available CA and descrambler
+slots, and their types.
+
+Return Value
+------------
+
+On success 0 is returned and :c:type:`ca_caps` is filled.
+
+On error, -1 is returned and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca-get-descr-info.rst b/Documentation/userspace-api/media/dvb/ca-get-descr-info.rst
new file mode 100644
index 000000000..0cfdcdab3
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-get-descr-info.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_GET_DESCR_INFO:
+
+=================
+CA_GET_DESCR_INFO
+=================
+
+Name
+----
+
+CA_GET_DESCR_INFO
+
+Synopsis
+--------
+
+.. c:macro:: CA_GET_DESCR_INFO
+
+``int ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc)``
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+``desc``
+  Pointer to struct :c:type:`ca_descr_info`.
+
+Description
+-----------
+
+Returns information about all descrambler slots.
+
+Return Value
+------------
+
+On success 0 is returned, and :c:type:`ca_descr_info` is filled.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca-get-msg.rst b/Documentation/userspace-api/media/dvb/ca-get-msg.rst
new file mode 100644
index 000000000..7c9a8d197
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-get-msg.rst
@@ -0,0 +1,50 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_GET_MSG:
+
+==========
+CA_GET_MSG
+==========
+
+Name
+----
+
+CA_GET_MSG
+
+Synopsis
+--------
+
+.. c:macro:: CA_GET_MSG
+
+``int ioctl(fd, CA_GET_MSG, struct ca_msg *msg)``
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+``msg``
+  Pointer to struct :c:type:`ca_msg`.
+
+Description
+-----------
+
+Receives a message via a CI CA module.
+
+.. note::
+
+   Please notice that, on most drivers, this is done by reading from
+   the /dev/adapter?/ca? device node.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca-get-slot-info.rst b/Documentation/userspace-api/media/dvb/ca-get-slot-info.rst
new file mode 100644
index 000000000..582444af7
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-get-slot-info.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_GET_SLOT_INFO:
+
+================
+CA_GET_SLOT_INFO
+================
+
+Name
+----
+
+CA_GET_SLOT_INFO
+
+Synopsis
+--------
+
+.. c:macro:: CA_GET_SLOT_INFO
+
+``int ioctl(fd, CA_GET_SLOT_INFO, struct ca_slot_info *info)``
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+``info``
+  Pointer to struct :c:type:`ca_slot_info`.
+
+Description
+-----------
+
+Returns information about a CA slot identified by
+:c:type:`ca_slot_info`.slot_num.
+
+Return Value
+------------
+
+On success 0 is returned, and :c:type:`ca_slot_info` is filled.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  -  ``ENODEV``
+       -  the slot is not available.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca-reset.rst b/Documentation/userspace-api/media/dvb/ca-reset.rst
new file mode 100644
index 000000000..b01ca48f0
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-reset.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_RESET:
+
+========
+CA_RESET
+========
+
+Name
+----
+
+CA_RESET
+
+Synopsis
+--------
+
+.. c:macro:: CA_RESET
+
+``int ioctl(fd, CA_RESET)``
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+Description
+-----------
+
+Puts the Conditional Access hardware on its initial state. It should
+be called before start using the CA hardware.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca-send-msg.rst b/Documentation/userspace-api/media/dvb/ca-send-msg.rst
new file mode 100644
index 000000000..7dd2ab4ef
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-send-msg.rst
@@ -0,0 +1,50 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_SEND_MSG:
+
+===========
+CA_SEND_MSG
+===========
+
+Name
+----
+
+CA_SEND_MSG
+
+Synopsis
+--------
+
+.. c:macro:: CA_SEND_MSG
+
+``int ioctl(fd, CA_SEND_MSG, struct ca_msg *msg)``
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+``msg``
+  Pointer to struct :c:type:`ca_msg`.
+
+Description
+-----------
+
+Sends a message via a CI CA module.
+
+.. note::
+
+   Please notice that, on most drivers, this is done by writing
+   to the /dev/adapter?/ca? device node.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca-set-descr.rst b/Documentation/userspace-api/media/dvb/ca-set-descr.rst
new file mode 100644
index 000000000..a740af34c
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca-set-descr.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_SET_DESCR:
+
+============
+CA_SET_DESCR
+============
+
+Name
+----
+
+CA_SET_DESCR
+
+Synopsis
+--------
+
+.. c:macro:: CA_SET_DESCR
+
+``int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)``
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+``msg``
+  Pointer to struct :c:type:`ca_descr`.
+
+Description
+-----------
+
+CA_SET_DESCR is used for feeding descrambler CA slots with descrambling
+keys (referred as control words).
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/ca.rst b/Documentation/userspace-api/media/dvb/ca.rst
new file mode 100644
index 000000000..6f6821e32
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca.rst
@@ -0,0 +1,25 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dvb_ca:
+
+####################
+Digital TV CA Device
+####################
+
+The Digital TV CA device controls the conditional access hardware. It
+can be accessed through ``/dev/dvb/adapter?/ca?``. Data types and and ioctl
+definitions can be accessed by including ``linux/dvb/ca.h`` in your
+application.
+
+.. note::
+
+   There are three ioctls at this API that aren't documented:
+   :ref:`CA_GET_MSG`, :ref:`CA_SEND_MSG` and :ref:`CA_SET_DESCR`.
+   Documentation for them are welcome.
+
+.. toctree::
+    :maxdepth: 1
+
+    ca_data_types
+    ca_function_calls
+    ca_high_level
diff --git a/Documentation/userspace-api/media/dvb/ca_data_types.rst b/Documentation/userspace-api/media/dvb/ca_data_types.rst
new file mode 100644
index 000000000..54ea2a987
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca_data_types.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _ca_data_types:
+
+*************
+CA Data Types
+*************
+
+.. kernel-doc:: include/uapi/linux/dvb/ca.h
diff --git a/Documentation/userspace-api/media/dvb/ca_function_calls.rst b/Documentation/userspace-api/media/dvb/ca_function_calls.rst
new file mode 100644
index 000000000..3b893fbd5
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca_function_calls.rst
@@ -0,0 +1,20 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _ca_function_calls:
+
+*****************
+CA Function Calls
+*****************
+
+.. toctree::
+    :maxdepth: 1
+
+    ca-fopen
+    ca-fclose
+    ca-reset
+    ca-get-cap
+    ca-get-slot-info
+    ca-get-descr-info
+    ca-get-msg
+    ca-send-msg
+    ca-set-descr
diff --git a/Documentation/userspace-api/media/dvb/ca_high_level.rst b/Documentation/userspace-api/media/dvb/ca_high_level.rst
new file mode 100644
index 000000000..a73f3691c
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/ca_high_level.rst
@@ -0,0 +1,157 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+The High level CI API
+=====================
+
+.. note::
+
+   This documentation is outdated.
+
+This document describes the high level CI API as in accordance to the
+Linux DVB API.
+
+
+With the High Level CI approach any new card with almost any random
+architecture can be implemented with this style, the definitions
+inside the switch statement can be easily adapted for any card, thereby
+eliminating the need for any additional ioctls.
+
+The disadvantage is that the driver/hardware has to manage the rest. For
+the application programmer it would be as simple as sending/receiving an
+array to/from the CI ioctls as defined in the Linux DVB API. No changes
+have been made in the API to accommodate this feature.
+
+
+Why the need for another CI interface?
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This is one of the most commonly asked question. Well a nice question.
+Strictly speaking this is not a new interface.
+
+The CI interface is defined in the DVB API in ca.h as:
+
+.. code-block:: c
+
+	typedef struct ca_slot_info {
+		int num;               /* slot number */
+
+		int type;              /* CA interface this slot supports */
+	#define CA_CI            1     /* CI high level interface */
+	#define CA_CI_LINK       2     /* CI link layer level interface */
+	#define CA_CI_PHYS       4     /* CI physical layer level interface */
+	#define CA_DESCR         8     /* built-in descrambler */
+	#define CA_SC          128     /* simple smart card interface */
+
+		unsigned int flags;
+	#define CA_CI_MODULE_PRESENT 1 /* module (or card) inserted */
+	#define CA_CI_MODULE_READY   2
+	} ca_slot_info_t;
+
+This CI interface follows the CI high level interface, which is not
+implemented by most applications. Hence this area is revisited.
+
+This CI interface is quite different in the case that it tries to
+accommodate all other CI based devices, that fall into the other categories.
+
+This means that this CI interface handles the EN50221 style tags in the
+Application layer only and no session management is taken care of by the
+application. The driver/hardware will take care of all that.
+
+This interface is purely an EN50221 interface exchanging APDU's. This
+means that no session management, link layer or a transport layer do
+exist in this case in the application to driver communication. It is
+as simple as that. The driver/hardware has to take care of that.
+
+With this High Level CI interface, the interface can be defined with the
+regular ioctls.
+
+All these ioctls are also valid for the High level CI interface
+
+#define CA_RESET          _IO('o', 128)
+#define CA_GET_CAP        _IOR('o', 129, ca_caps_t)
+#define CA_GET_SLOT_INFO  _IOR('o', 130, ca_slot_info_t)
+#define CA_GET_DESCR_INFO _IOR('o', 131, ca_descr_info_t)
+#define CA_GET_MSG        _IOR('o', 132, ca_msg_t)
+#define CA_SEND_MSG       _IOW('o', 133, ca_msg_t)
+#define CA_SET_DESCR      _IOW('o', 134, ca_descr_t)
+
+
+On querying the device, the device yields information thus:
+
+.. code-block:: none
+
+	CA_GET_SLOT_INFO
+	----------------------------
+	Command = [info]
+	APP: Number=[1]
+	APP: Type=[1]
+	APP: flags=[1]
+	APP: CI High level interface
+	APP: CA/CI Module Present
+
+	CA_GET_CAP
+	----------------------------
+	Command = [caps]
+	APP: Slots=[1]
+	APP: Type=[1]
+	APP: Descrambler keys=[16]
+	APP: Type=[1]
+
+	CA_SEND_MSG
+	----------------------------
+	Descriptors(Program Level)=[ 09 06 06 04 05 50 ff f1]
+	Found CA descriptor @ program level
+
+	(20) ES type=[2] ES pid=[201]  ES length =[0 (0x0)]
+	(25) ES type=[4] ES pid=[301]  ES length =[0 (0x0)]
+	ca_message length is 25 (0x19) bytes
+	EN50221 CA MSG=[ 9f 80 32 19 03 01 2d d1 f0 08 01 09 06 06 04 05 50 ff f1 02 e0 c9 00 00 04 e1 2d 00 00]
+
+
+Not all ioctl's are implemented in the driver from the API, the other
+features of the hardware that cannot be implemented by the API are achieved
+using the CA_GET_MSG and CA_SEND_MSG ioctls. An EN50221 style wrapper is
+used to exchange the data to maintain compatibility with other hardware.
+
+.. code-block:: c
+
+	/* a message to/from a CI-CAM */
+	typedef struct ca_msg {
+		unsigned int index;
+		unsigned int type;
+		unsigned int length;
+		unsigned char msg[256];
+	} ca_msg_t;
+
+
+The flow of data can be described thus,
+
+.. code-block:: none
+
+	App (User)
+	-----
+	parse
+	  |
+	  |
+	  v
+	en50221 APDU (package)
+   --------------------------------------
+   |	  |				| High Level CI driver
+   |	  |				|
+   |	  v				|
+   |	en50221 APDU (unpackage)	|
+   |	  |				|
+   |	  |				|
+   |	  v				|
+   |	sanity checks			|
+   |	  |				|
+   |	  |				|
+   |	  v				|
+   |	do (H/W dep)			|
+   --------------------------------------
+	  |    Hardware
+	  |
+	  v
+
+The High Level CI interface uses the EN50221 DVB standard, following a
+standard ensures futureproofness.
diff --git a/Documentation/userspace-api/media/dvb/demux.rst b/Documentation/userspace-api/media/dvb/demux.rst
new file mode 100644
index 000000000..364ef4847
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/demux.rst
@@ -0,0 +1,23 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dvb_demux:
+
+#######################
+Digital TV Demux Device
+#######################
+
+The Digital TV demux device controls the MPEG-TS filters for the
+digital TV. If the driver and hardware supports, those filters are
+implemented at the hardware. Otherwise, the Kernel provides a software
+emulation.
+
+It can be accessed through ``/dev/adapter?/demux?``. Data types and and
+ioctl definitions can be accessed by including ``linux/dvb/dmx.h`` in
+your application.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    dmx_types
+    dmx_fcalls
diff --git a/Documentation/userspace-api/media/dvb/dmx-add-pid.rst b/Documentation/userspace-api/media/dvb/dmx-add-pid.rst
new file mode 100644
index 000000000..ea0c7dd91
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-add-pid.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_ADD_PID:
+
+===========
+DMX_ADD_PID
+===========
+
+Name
+----
+
+DMX_ADD_PID
+
+Synopsis
+--------
+
+.. c:macro:: DMX_ADD_PID
+
+``int ioctl(fd, DMX_ADD_PID, __u16 *pid)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``pid``
+   PID number to be filtered.
+
+Description
+-----------
+
+This ioctl call allows to add multiple PIDs to a transport stream filter
+previously set up with :ref:`DMX_SET_PES_FILTER` and output equal to
+:c:type:`DMX_OUT_TSDEMUX_TAP <dmx_output>`.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-expbuf.rst b/Documentation/userspace-api/media/dvb/dmx-expbuf.rst
new file mode 100644
index 000000000..5cdc2035e
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-expbuf.rst
@@ -0,0 +1,87 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_EXPBUF:
+
+****************
+ioctl DMX_EXPBUF
+****************
+
+Name
+====
+
+DMX_EXPBUF - Export a buffer as a DMABUF file descriptor.
+
+.. warning:: this API is still experimental
+
+Synopsis
+========
+
+.. c:macro:: DMX_EXPBUF
+
+``int ioctl(int fd, DMX_EXPBUF, struct dmx_exportbuffer *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`dmx_exportbuffer`.
+
+Description
+===========
+
+This ioctl is an extension to the memory mapping I/O method.
+It can be used to export a buffer as a DMABUF file at any time after
+buffers have been allocated with the :ref:`DMX_REQBUFS` ioctl.
+
+To export a buffer, applications fill struct :c:type:`dmx_exportbuffer`.
+Applications must set the ``index`` field. Valid index numbers
+range from zero to the number of buffers allocated with :ref:`DMX_REQBUFS`
+(struct :c:type:`dmx_requestbuffers` ``count``) minus one.
+Additional flags may be posted in the ``flags`` field. Refer to a manual
+for open() for details. Currently only O_CLOEXEC, O_RDONLY, O_WRONLY,
+and O_RDWR are supported.
+All other fields must be set to zero. In the
+case of multi-planar API, every plane is exported separately using
+multiple :ref:`DMX_EXPBUF` calls.
+
+After calling :ref:`DMX_EXPBUF` the ``fd`` field will be set by a
+driver, on success. This is a DMABUF file descriptor. The application may
+pass it to other DMABUF-aware devices. It is recommended to close a DMABUF
+file when it is no longer used to allow the associated memory to be reclaimed.
+
+Examples
+========
+
+.. code-block:: c
+
+    int buffer_export(int v4lfd, enum dmx_buf_type bt, int index, int *dmafd)
+    {
+	struct dmx_exportbuffer expbuf;
+
+	memset(&expbuf, 0, sizeof(expbuf));
+	expbuf.type = bt;
+	expbuf.index = index;
+	if (ioctl(v4lfd, DMX_EXPBUF, &expbuf) == -1) {
+	    perror("DMX_EXPBUF");
+	    return -1;
+	}
+
+	*dmafd = expbuf.fd;
+
+	return 0;
+    }
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    A queue is not in MMAP mode or DMABUF exporting is not supported or
+    ``flags`` or ``index`` fields are invalid.
diff --git a/Documentation/userspace-api/media/dvb/dmx-fclose.rst b/Documentation/userspace-api/media/dvb/dmx-fclose.rst
new file mode 100644
index 000000000..719ac1d4f
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-fclose.rst
@@ -0,0 +1,42 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _dmx_fclose:
+
+========================
+Digital TV demux close()
+========================
+
+Name
+----
+
+Digital TV demux close()
+
+Synopsis
+--------
+
+.. c:function:: int close(int fd)
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to
+  :c:func:`open()`.
+
+Description
+-----------
+
+This system call deactivates and deallocates a filter that was
+previously allocated via the :c:func:`open()` call.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error, -1 is returned and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-fopen.rst b/Documentation/userspace-api/media/dvb/dmx-fopen.rst
new file mode 100644
index 000000000..8f0a2b831
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-fopen.rst
@@ -0,0 +1,88 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _dmx_fopen:
+
+=======================
+Digital TV demux open()
+=======================
+
+Name
+----
+
+Digital TV demux open()
+
+Synopsis
+--------
+
+.. c:function:: int open(const char *deviceName, int flags)
+
+Arguments
+---------
+
+``name``
+  Name of specific Digital TV demux device.
+
+``flags``
+  A bit-wise OR of the following flags:
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -
+       - ``O_RDONLY``
+       - read-only access
+
+    -
+       - ``O_RDWR``
+       - read/write access
+
+    -
+       - ``O_NONBLOCK``
+       - open in non-blocking mode
+         (blocking mode is the default)
+
+Description
+-----------
+
+This system call, used with a device name of ``/dev/dvb/adapter?/demux?``,
+allocates a new filter and returns a handle which can be used for
+subsequent control of that filter. This call has to be made for each
+filter to be used, i.e. every returned file descriptor is a reference to
+a single filter. ``/dev/dvb/adapter?/dvr?`` is a logical device to be used
+for retrieving Transport Streams for digital video recording. When
+reading from this device a transport stream containing the packets from
+all PES filters set in the corresponding demux device
+(``/dev/dvb/adapter?/demux?``) having the output set to ``DMX_OUT_TS_TAP``.
+A recorded Transport Stream is replayed by writing to this device.
+
+The significance of blocking or non-blocking mode is described in the
+documentation for functions where there is a difference. It does not
+affect the semantics of the ``open()`` call itself. A device opened
+in blocking mode can later be put into non-blocking mode (and vice versa)
+using the ``F_SETFL`` command of the fcntl system call.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  -  ``EMFILE``
+       -  “Too many open files”, i.e. no more filters available.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-fread.rst b/Documentation/userspace-api/media/dvb/dmx-fread.rst
new file mode 100644
index 000000000..78e9daef5
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-fread.rst
@@ -0,0 +1,77 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _dmx_fread:
+
+=======================
+Digital TV demux read()
+=======================
+
+Name
+----
+
+Digital TV demux read()
+
+Synopsis
+--------
+
+.. c:function:: size_t read(int fd, void *buf, size_t count)
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+ ``buf``
+   Buffer to be filled
+
+``count``
+   Max number of bytes to read
+
+Description
+-----------
+
+This system call returns filtered data, which might be section or Packetized
+Elementary Stream (PES) data. The filtered data is transferred from
+the driver’s internal circular buffer to ``buf``. The maximum amount of data
+to be transferred is implied by count.
+
+.. note::
+
+   if a section filter created with
+   :c:type:`DMX_CHECK_CRC <dmx_sct_filter_params>` flag set,
+   data that fails on CRC check will be silently ignored.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  -  ``EWOULDBLOCK``
+       -  No data to return and ``O_NONBLOCK`` was specified.
+
+    -  -  ``EOVERFLOW``
+       -  The filtered data was not read from the buffer in due time,
+	  resulting in non-read data being lost. The buffer is flushed.
+
+    -  -  ``ETIMEDOUT``
+       -  The section was not loaded within the stated timeout period.
+          See ioctl :ref:`DMX_SET_FILTER` for how to set a timeout.
+
+    -  -  ``EFAULT``
+       -  The driver failed to write to the callers buffer due to an
+          invalid \*buf pointer.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-fwrite.rst b/Documentation/userspace-api/media/dvb/dmx-fwrite.rst
new file mode 100644
index 000000000..e11ee0ba8
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-fwrite.rst
@@ -0,0 +1,70 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _dmx_fwrite:
+
+========================
+Digital TV demux write()
+========================
+
+Name
+----
+
+Digital TV demux write()
+
+Synopsis
+--------
+
+.. c:function:: ssize_t write(int fd, const void *buf, size_t count)
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open()`.
+
+``buf``
+     Buffer with data to be written
+
+``count``
+    Number of bytes at the buffer
+
+Description
+-----------
+
+This system call is only provided by the logical device
+``/dev/dvb/adapter?/dvr?``, associated with the physical demux device that
+provides the actual DVR functionality. It is used for replay of a
+digitally recorded Transport Stream. Matching filters have to be defined
+in the corresponding physical demux device, ``/dev/dvb/adapter?/demux?``.
+The amount of data to be transferred is implied by count.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  -  ``EWOULDBLOCK``
+       -  No data was written. This might happen if ``O_NONBLOCK`` was
+	  specified and there is no more buffer space available (if
+	  ``O_NONBLOCK`` is not specified the function will block until buffer
+	  space is available).
+
+    -  -  ``EBUSY``
+       -  This error code indicates that there are conflicting requests. The
+	  corresponding demux device is setup to receive data from the
+	  front- end. Make sure that these filters are stopped and that the
+	  filters with input set to ``DMX_IN_DVR`` are started.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst b/Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst
new file mode 100644
index 000000000..4f5f0505c
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst
@@ -0,0 +1,62 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_GET_PES_PIDS:
+
+================
+DMX_GET_PES_PIDS
+================
+
+Name
+----
+
+DMX_GET_PES_PIDS
+
+Synopsis
+--------
+
+.. c:macro:: DMX_GET_PES_PIDS
+
+``int ioctl(fd, DMX_GET_PES_PIDS, __u16 pids[5])``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``pids``
+    Array used to store 5 Program IDs.
+
+Description
+-----------
+
+This ioctl allows to query a DVB device to return the first PID used
+by audio, video, textext, subtitle and PCR programs on a given service.
+They're stored as:
+
+=======================	========	=======================================
+PID  element		position	content
+=======================	========	=======================================
+pids[DMX_PES_AUDIO]	0		first audio PID
+pids[DMX_PES_VIDEO]	1		first video PID
+pids[DMX_PES_TELETEXT]	2		first teletext PID
+pids[DMX_PES_SUBTITLE]	3		first subtitle PID
+pids[DMX_PES_PCR]	4		first Program Clock Reference PID
+=======================	========	=======================================
+
+.. note::
+
+	A value equal to 0xffff means that the PID was not filled by the
+	Kernel.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-get-stc.rst b/Documentation/userspace-api/media/dvb/dmx-get-stc.rst
new file mode 100644
index 000000000..6ada74f6e
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-get-stc.rst
@@ -0,0 +1,64 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_GET_STC:
+
+===========
+DMX_GET_STC
+===========
+
+Name
+----
+
+DMX_GET_STC
+
+Synopsis
+--------
+
+.. c:macro:: DMX_GET_STC
+
+``int ioctl(int fd, DMX_GET_STC, struct dmx_stc *stc)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``stc``
+    Pointer to :c:type:`dmx_stc` where the stc data is to be stored.
+
+Description
+-----------
+
+This ioctl call returns the current value of the system time counter
+(which is driven by a PES filter of type :c:type:`DMX_PES_PCR <dmx_ts_pes>`).
+Some hardware supports more than one STC, so you must specify which one by
+setting the :c:type:`num <dmx_stc>` field of stc before the ioctl (range 0...n).
+The result is returned in form of a ratio with a 64 bit numerator
+and a 32 bit denominator, so the real 90kHz STC value is
+``stc->stc / stc->base``.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  .. row 1
+
+       -  ``EINVAL``
+
+       -  Invalid stc number.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-mmap.rst b/Documentation/userspace-api/media/dvb/dmx-mmap.rst
new file mode 100644
index 000000000..8826c6226
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-mmap.rst
@@ -0,0 +1,115 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _dmx-mmap:
+
+*****************
+Digital TV mmap()
+*****************
+
+Name
+====
+
+dmx-mmap - Map device memory into application address space
+
+.. warning:: this API is still experimental
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+    #include <sys/mman.h>
+
+.. c:function:: void *mmap( void *start, size_t length, int prot, int flags, int fd, off_t offset )
+
+Arguments
+=========
+
+``start``
+    Map the buffer to this address in the application's address space.
+    When the ``MAP_FIXED`` flag is specified, ``start`` must be a
+    multiple of the pagesize and mmap will fail when the specified
+    address cannot be used. Use of this option is discouraged;
+    applications should just specify a ``NULL`` pointer here.
+
+``length``
+    Length of the memory area to map. This must be a multiple of the
+    DVB packet length (188, on most drivers).
+
+``prot``
+    The ``prot`` argument describes the desired memory protection.
+    Regardless of the device type and the direction of data exchange it
+    should be set to ``PROT_READ`` | ``PROT_WRITE``, permitting read
+    and write access to image buffers. Drivers should support at least
+    this combination of flags.
+
+``flags``
+    The ``flags`` parameter specifies the type of the mapped object,
+    mapping options and whether modifications made to the mapped copy of
+    the page are private to the process or are to be shared with other
+    references.
+
+    ``MAP_FIXED`` requests that the driver selects no other address than
+    the one specified. If the specified address cannot be used,
+    :c:func:`mmap()` will fail. If ``MAP_FIXED`` is specified,
+    ``start`` must be a multiple of the pagesize. Use of this option is
+    discouraged.
+
+    One of the ``MAP_SHARED`` or ``MAP_PRIVATE`` flags must be set.
+    ``MAP_SHARED`` allows applications to share the mapped memory with
+    other (e. g. child-) processes.
+
+    .. note::
+
+       The Linux Digital TV applications should not set the
+       ``MAP_PRIVATE``, ``MAP_DENYWRITE``, ``MAP_EXECUTABLE`` or ``MAP_ANON``
+       flags.
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``offset``
+    Offset of the buffer in device memory, as returned by
+    :ref:`DMX_QUERYBUF` ioctl.
+
+Description
+===========
+
+The :c:func:`mmap()` function asks to map ``length`` bytes starting at
+``offset`` in the memory of the device specified by ``fd`` into the
+application address space, preferably at address ``start``. This latter
+address is a hint only, and is usually specified as 0.
+
+Suitable length and offset parameters are queried with the
+:ref:`DMX_QUERYBUF` ioctl. Buffers must be allocated with the
+:ref:`DMX_REQBUFS` ioctl before they can be queried.
+
+To unmap buffers the :c:func:`munmap()` function is used.
+
+Return Value
+============
+
+On success :c:func:`mmap()` returns a pointer to the mapped buffer. On
+error ``MAP_FAILED`` (-1) is returned, and the ``errno`` variable is set
+appropriately. Possible error codes are:
+
+EBADF
+    ``fd`` is not a valid file descriptor.
+
+EACCES
+    ``fd`` is not open for reading and writing.
+
+EINVAL
+    The ``start`` or ``length`` or ``offset`` are not suitable. (E. g.
+    they are too large, or not aligned on a ``PAGESIZE`` boundary.)
+
+    The ``flags`` or ``prot`` value is not supported.
+
+    No buffers have been allocated with the
+    :ref:`DMX_REQBUFS` ioctl.
+
+ENOMEM
+    Not enough physical or virtual memory was available to complete the
+    request.
diff --git a/Documentation/userspace-api/media/dvb/dmx-munmap.rst b/Documentation/userspace-api/media/dvb/dmx-munmap.rst
new file mode 100644
index 000000000..66bbc11e5
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-munmap.rst
@@ -0,0 +1,52 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _dmx-munmap:
+
+************
+DVB munmap()
+************
+
+Name
+====
+
+dmx-munmap - Unmap device memory
+
+.. warning:: This API is still experimental.
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+    #include <sys/mman.h>
+
+.. c:function:: int munmap( void *start, size_t length )
+
+Arguments
+=========
+
+``start``
+    Address of the mapped buffer as returned by the
+    :c:func:`mmap()` function.
+
+``length``
+    Length of the mapped buffer. This must be the same value as given to
+    :c:func:`mmap()`.
+
+Description
+===========
+
+Unmaps a previously with the :c:func:`mmap()` function mapped
+buffer and frees it, if possible.
+
+Return Value
+============
+
+On success :c:func:`munmap()` returns 0, on failure -1 and the
+``errno`` variable is set appropriately:
+
+EINVAL
+    The ``start`` or ``length`` is incorrect, or no buffers have been
+    mapped yet.
diff --git a/Documentation/userspace-api/media/dvb/dmx-qbuf.rst b/Documentation/userspace-api/media/dvb/dmx-qbuf.rst
new file mode 100644
index 000000000..17e70143c
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-qbuf.rst
@@ -0,0 +1,85 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_QBUF:
+
+*************************
+ioctl DMX_QBUF, DMX_DQBUF
+*************************
+
+Name
+====
+
+DMX_QBUF - DMX_DQBUF - Exchange a buffer with the driver
+
+.. warning:: this API is still experimental
+
+Synopsis
+========
+
+.. c:macro:: DMX_QBUF
+
+``int ioctl(int fd, DMX_QBUF, struct dmx_buffer *argp)``
+
+.. c:macro:: DMX_DQBUF
+
+``int ioctl(int fd, DMX_DQBUF, struct dmx_buffer *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`dmx_buffer`.
+
+Description
+===========
+
+Applications call the ``DMX_QBUF`` ioctl to enqueue an empty
+(capturing) or filled (output) buffer in the driver's incoming queue.
+The semantics depend on the selected I/O method.
+
+To enqueue a buffer applications set the ``index`` field. Valid index
+numbers range from zero to the number of buffers allocated with
+:ref:`DMX_REQBUFS` (struct :c:type:`dmx_requestbuffers` ``count``) minus
+one. The contents of the struct :c:type:`dmx_buffer` returned
+by a :ref:`DMX_QUERYBUF` ioctl will do as well.
+
+When ``DMX_QBUF`` is called with a pointer to this structure, it locks the
+memory pages of the buffer in physical memory, so they cannot be swapped
+out to disk. Buffers remain locked until dequeued, until the
+the device is closed.
+
+Applications call the ``DMX_DQBUF`` ioctl to dequeue a filled
+(capturing) buffer from the driver's outgoing queue.
+They just set the ``index`` field with the buffer ID to be queued.
+When ``DMX_DQBUF`` is called with a pointer to struct :c:type:`dmx_buffer`,
+the driver fills the remaining fields or returns an error code.
+
+By default ``DMX_DQBUF`` blocks when no buffer is in the outgoing
+queue. When the ``O_NONBLOCK`` flag was given to the
+:c:func:`open()` function, ``DMX_DQBUF`` returns
+immediately with an ``EAGAIN`` error code when no buffer is available.
+
+The struct :c:type:`dmx_buffer` structure is specified in
+:ref:`buffer`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EAGAIN
+    Non-blocking I/O has been selected using ``O_NONBLOCK`` and no
+    buffer was in the outgoing queue.
+
+EINVAL
+    The ``index`` is out of bounds, or no buffers have been allocated yet.
+
+EIO
+    ``DMX_DQBUF`` failed due to an internal error. Can also indicate
+    temporary problems like signal loss or CRC errors.
diff --git a/Documentation/userspace-api/media/dvb/dmx-querybuf.rst b/Documentation/userspace-api/media/dvb/dmx-querybuf.rst
new file mode 100644
index 000000000..08ee9853d
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-querybuf.rst
@@ -0,0 +1,64 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_QUERYBUF:
+
+******************
+ioctl DMX_QUERYBUF
+******************
+
+Name
+====
+
+DMX_QUERYBUF - Query the status of a buffer
+
+.. warning:: this API is still experimental
+
+Synopsis
+========
+
+.. c:macro:: DMX_QUERYBUF
+
+``int ioctl(int fd, DMX_QUERYBUF, struct dvb_buffer *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`dvb_buffer`.
+
+Description
+===========
+
+This ioctl is part of the mmap streaming I/O method. It can
+be used to query the status of a buffer at any time after buffers have
+been allocated with the :ref:`DMX_REQBUFS` ioctl.
+
+Applications set the ``index`` field. Valid index numbers range from zero
+to the number of buffers allocated with :ref:`DMX_REQBUFS`
+(struct :c:type:`dvb_requestbuffers` ``count``) minus one.
+
+After calling :ref:`DMX_QUERYBUF` with a pointer to this structure,
+drivers return an error code or fill the rest of the structure.
+
+On success, the ``offset`` will contain the offset of the buffer from the
+start of the device memory, the ``length`` field its size, and the
+``bytesused`` the number of bytes occupied by data in the buffer (payload).
+
+Return Value
+============
+
+On success 0 is returned, the ``offset`` will contain the offset of the
+buffer from the start of the device memory, the ``length`` field its size,
+and the ``bytesused`` the number of bytes occupied by data in the buffer
+(payload).
+
+On error it returns -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The ``index`` is out of bounds.
diff --git a/Documentation/userspace-api/media/dvb/dmx-remove-pid.rst b/Documentation/userspace-api/media/dvb/dmx-remove-pid.rst
new file mode 100644
index 000000000..f75b33e5e
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-remove-pid.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_REMOVE_PID:
+
+==============
+DMX_REMOVE_PID
+==============
+
+Name
+----
+
+DMX_REMOVE_PID
+
+Synopsis
+--------
+
+.. c:macro:: DMX_REMOVE_PID
+
+``int ioctl(fd, DMX_REMOVE_PID, __u16 *pid)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``pid``
+    PID of the PES filter to be removed.
+
+Description
+-----------
+
+This ioctl call allows to remove a PID when multiple PIDs are set on a
+transport stream filter, e. g. a filter previously set up with output
+equal to :c:type:`DMX_OUT_TSDEMUX_TAP <dmx_output>`, created via either
+:ref:`DMX_SET_PES_FILTER` or :ref:`DMX_ADD_PID`.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst b/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst
new file mode 100644
index 000000000..d2bb1909e
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst
@@ -0,0 +1,75 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_REQBUFS:
+
+*****************
+ioctl DMX_REQBUFS
+*****************
+
+Name
+====
+
+DMX_REQBUFS - Initiate Memory Mapping and/or DMA buffer I/O
+
+.. warning:: this API is still experimental
+
+Synopsis
+========
+
+.. c:macro:: DMX_REQBUFS
+
+``int ioctl(int fd, DMX_REQBUFS, struct dmx_requestbuffers *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`dmx_requestbuffers`.
+
+Description
+===========
+
+This ioctl is used to initiate a memory mapped or DMABUF based demux I/O.
+
+Memory mapped buffers are located in device memory and must be allocated
+with this ioctl before they can be mapped into the application's address
+space. User buffers are allocated by applications themselves, and this
+ioctl is merely used to switch the driver into user pointer I/O mode and
+to setup some internal structures. Similarly, DMABUF buffers are
+allocated by applications through a device driver, and this ioctl only
+configures the driver into DMABUF I/O mode without performing any direct
+allocation.
+
+To allocate device buffers applications initialize all fields of the
+struct :c:type:`dmx_requestbuffers` structure. They set the  ``count`` field
+to the desired number of buffers,  and ``size`` to the size of each
+buffer.
+
+When the ioctl is called with a pointer to this structure, the driver will
+attempt to allocate the requested number of buffers and it stores the actual
+number allocated in the ``count`` field. The ``count`` can be smaller than the number requested, even zero, when the driver runs out of free memory. A larger
+number is also possible when the driver requires more buffers to
+function correctly. The actual allocated buffer size can is returned
+at ``size``, and can be smaller than what's requested.
+
+When this I/O method is not supported, the ioctl returns an ``EOPNOTSUPP``
+error code.
+
+Applications can call :ref:`DMX_REQBUFS` again to change the number of
+buffers, however this cannot succeed when any buffers are still mapped.
+A ``count`` value of zero frees all buffers, after aborting or finishing
+any DMA in progress.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EOPNOTSUPP
+    The  the requested I/O method is not supported.
diff --git a/Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst b/Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst
new file mode 100644
index 000000000..13ce4092c
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_SET_BUFFER_SIZE:
+
+===================
+DMX_SET_BUFFER_SIZE
+===================
+
+Name
+----
+
+DMX_SET_BUFFER_SIZE
+
+Synopsis
+--------
+
+.. c:macro:: DMX_SET_BUFFER_SIZE
+
+``int ioctl(int fd, DMX_SET_BUFFER_SIZE, unsigned long size)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``size``
+    Unsigned long size
+
+Description
+-----------
+
+This ioctl call is used to set the size of the circular buffer used for
+filtered data. The default size is two maximum sized sections, i.e. if
+this function is not called a buffer size of ``2 * 4096`` bytes will be
+used.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-set-filter.rst b/Documentation/userspace-api/media/dvb/dmx-set-filter.rst
new file mode 100644
index 000000000..f43455b7a
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-set-filter.rst
@@ -0,0 +1,55 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_SET_FILTER:
+
+==============
+DMX_SET_FILTER
+==============
+
+Name
+----
+
+DMX_SET_FILTER
+
+Synopsis
+--------
+
+.. c:macro:: DMX_SET_FILTER
+
+``int ioctl(int fd, DMX_SET_FILTER, struct dmx_sct_filter_params *params)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``params``
+
+    Pointer to structure containing filter parameters.
+
+Description
+-----------
+
+This ioctl call sets up a filter according to the filter and mask
+parameters provided. A timeout may be defined stating number of seconds
+to wait for a section to be loaded. A value of 0 means that no timeout
+should be applied. Finally there is a flag field where it is possible to
+state whether a section should be CRC-checked, whether the filter should
+be a ”one-shot” filter, i.e. if the filtering operation should be
+stopped after the first section is received, and whether the filtering
+operation should be started immediately (without waiting for a
+:ref:`DMX_START` ioctl call). If a filter was previously set-up, this
+filter will be canceled, and the receive buffer will be flushed.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-set-pes-filter.rst b/Documentation/userspace-api/media/dvb/dmx-set-pes-filter.rst
new file mode 100644
index 000000000..5bb682e4a
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-set-pes-filter.rst
@@ -0,0 +1,64 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_SET_PES_FILTER:
+
+==================
+DMX_SET_PES_FILTER
+==================
+
+Name
+----
+
+DMX_SET_PES_FILTER
+
+Synopsis
+--------
+
+.. c:macro:: DMX_SET_PES_FILTER
+
+``int ioctl(int fd, DMX_SET_PES_FILTER, struct dmx_pes_filter_params *params)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``params``
+    Pointer to structure containing filter parameters.
+
+Description
+-----------
+
+This ioctl call sets up a PES filter according to the parameters
+provided. By a PES filter is meant a filter that is based just on the
+packet identifier (PID), i.e. no PES header or payload filtering
+capability is supported.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  .. row 1
+
+       -  ``EBUSY``
+
+       -  This error code indicates that there are conflicting requests.
+	  There are active filters filtering data from another input source.
+	  Make sure that these filters are stopped before starting this
+	  filter.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-start.rst b/Documentation/userspace-api/media/dvb/dmx-start.rst
new file mode 100644
index 000000000..aedccf952
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-start.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_START:
+
+=========
+DMX_START
+=========
+
+Name
+----
+
+DMX_START
+
+Synopsis
+--------
+
+.. c:macro:: DMX_START
+
+``int ioctl(int fd, DMX_START)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+Description
+-----------
+
+This ioctl call is used to start the actual filtering operation defined
+via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER`.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EINVAL``
+
+       -  Invalid argument, i.e. no filtering parameters provided via the
+	  :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` ioctls.
+
+    -  .. row 2
+
+       -  ``EBUSY``
+
+       -  This error code indicates that there are conflicting requests.
+	  There are active filters filtering data from another input source.
+	  Make sure that these filters are stopped before starting this
+	  filter.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx-stop.rst b/Documentation/userspace-api/media/dvb/dmx-stop.rst
new file mode 100644
index 000000000..8661e6772
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx-stop.rst
@@ -0,0 +1,44 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_STOP:
+
+========
+DMX_STOP
+========
+
+Name
+----
+
+DMX_STOP
+
+Synopsis
+--------
+
+.. c:macro:: DMX_STOP
+
+``int ioctl(int fd, DMX_STOP)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+Description
+-----------
+
+This ioctl call is used to stop the actual filtering operation defined
+via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` and
+started via the :ref:`DMX_START` command.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/dmx_fcalls.rst b/Documentation/userspace-api/media/dvb/dmx_fcalls.rst
new file mode 100644
index 000000000..a14e7a61f
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx_fcalls.rst
@@ -0,0 +1,30 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dmx_fcalls:
+
+********************
+Demux Function Calls
+********************
+
+.. toctree::
+    :maxdepth: 1
+
+    dmx-fopen
+    dmx-fclose
+    dmx-fread
+    dmx-fwrite
+    dmx-mmap
+    dmx-munmap
+    dmx-start
+    dmx-stop
+    dmx-set-filter
+    dmx-set-pes-filter
+    dmx-set-buffer-size
+    dmx-get-stc
+    dmx-get-pes-pids
+    dmx-add-pid
+    dmx-remove-pid
+    dmx-reqbufs
+    dmx-querybuf
+    dmx-expbuf
+    dmx-qbuf
diff --git a/Documentation/userspace-api/media/dvb/dmx_types.rst b/Documentation/userspace-api/media/dvb/dmx_types.rst
new file mode 100644
index 000000000..33458fbb8
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx_types.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dmx_types:
+
+****************
+Demux Data Types
+****************
+
+.. kernel-doc:: include/uapi/linux/dvb/dmx.h
diff --git a/Documentation/userspace-api/media/dvb/dvb-fe-read-status.rst b/Documentation/userspace-api/media/dvb/dvb-fe-read-status.rst
new file mode 100644
index 000000000..fbd0548f5
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dvb-fe-read-status.rst
@@ -0,0 +1,25 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dvb-fe-read-status:
+
+***************************************
+Querying frontend status and statistics
+***************************************
+
+Once :ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` is called, the
+frontend will run a kernel thread that will periodically check for the
+tuner lock status and provide statistics about the quality of the
+signal.
+
+The information about the frontend tuner locking status can be queried
+using :ref:`FE_READ_STATUS`.
+
+Signal statistics are provided via
+:ref:`FE_GET_PROPERTY`.
+
+.. note::
+
+   Most statistics require the demodulator to be fully locked
+   (e. g. with :c:type:`FE_HAS_LOCK <fe_status>` bit set). See
+   :ref:`Frontend statistics indicators <frontend-stat-properties>` for
+   more details.
diff --git a/Documentation/userspace-api/media/dvb/dvb-frontend-event.rst b/Documentation/userspace-api/media/dvb/dvb-frontend-event.rst
new file mode 100644
index 000000000..0e2fd3a0a
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dvb-frontend-event.rst
@@ -0,0 +1,15 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. c:type:: dvb_frontend_event
+
+***************
+frontend events
+***************
+
+
+.. code-block:: c
+
+     struct dvb_frontend_event {
+	 fe_status_t status;
+	 struct dvb_frontend_parameters parameters;
+     };
diff --git a/Documentation/userspace-api/media/dvb/dvb-frontend-parameters.rst b/Documentation/userspace-api/media/dvb/dvb-frontend-parameters.rst
new file mode 100644
index 000000000..9dd2f5424
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dvb-frontend-parameters.rst
@@ -0,0 +1,119 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. c:type:: dvb_frontend_parameters
+
+*******************
+frontend parameters
+*******************
+
+The kind of parameters passed to the frontend device for tuning depend
+on the kind of hardware you are using.
+
+The struct ``dvb_frontend_parameters`` uses a union with specific
+per-system parameters. However, as newer delivery systems required more
+data, the structure size weren't enough to fit, and just extending its
+size would break the existing applications. So, those parameters were
+replaced by the usage of
+:ref:`FE_GET_PROPERTY/FE_SET_PROPERTY <FE_GET_PROPERTY>`
+ioctl's. The new API is flexible enough to add new parameters to
+existing delivery systems, and to add newer delivery systems.
+
+So, newer applications should use
+:ref:`FE_GET_PROPERTY/FE_SET_PROPERTY <FE_GET_PROPERTY>`
+instead, in order to be able to support the newer System Delivery like
+DVB-S2, DVB-T2, DVB-C2, ISDB, etc.
+
+All kinds of parameters are combined as a union in the
+``dvb_frontend_parameters`` structure:
+
+
+.. code-block:: c
+
+    struct dvb_frontend_parameters {
+	uint32_t frequency;     /* (absolute) frequency in Hz for QAM/OFDM */
+		    /* intermediate frequency in kHz for QPSK */
+	fe_spectral_inversion_t inversion;
+	union {
+	    struct dvb_qpsk_parameters qpsk;
+	    struct dvb_qam_parameters  qam;
+	    struct dvb_ofdm_parameters ofdm;
+	    struct dvb_vsb_parameters  vsb;
+	} u;
+    };
+
+In the case of QPSK frontends the ``frequency`` field specifies the
+intermediate frequency, i.e. the offset which is effectively added to
+the local oscillator frequency (LOF) of the LNB. The intermediate
+frequency has to be specified in units of kHz. For QAM and OFDM
+frontends the ``frequency`` specifies the absolute frequency and is
+given in Hz.
+
+
+.. c:type:: dvb_qpsk_parameters
+
+QPSK parameters
+===============
+
+For satellite QPSK frontends you have to use the ``dvb_qpsk_parameters``
+structure:
+
+
+.. code-block:: c
+
+     struct dvb_qpsk_parameters {
+	 uint32_t        symbol_rate;  /* symbol rate in Symbols per second */
+	 fe_code_rate_t  fec_inner;    /* forward error correction (see above) */
+     };
+
+
+.. c:type:: dvb_qam_parameters
+
+QAM parameters
+==============
+
+for cable QAM frontend you use the ``dvb_qam_parameters`` structure:
+
+
+.. code-block:: c
+
+     struct dvb_qam_parameters {
+	 uint32_t         symbol_rate; /* symbol rate in Symbols per second */
+	 fe_code_rate_t   fec_inner;   /* forward error correction (see above) */
+	 fe_modulation_t  modulation;  /* modulation type (see above) */
+     };
+
+
+.. c:type:: dvb_vsb_parameters
+
+VSB parameters
+==============
+
+ATSC frontends are supported by the ``dvb_vsb_parameters`` structure:
+
+
+.. code-block:: c
+
+    struct dvb_vsb_parameters {
+	fe_modulation_t modulation; /* modulation type (see above) */
+    };
+
+
+.. c:type:: dvb_ofdm_parameters
+
+OFDM parameters
+===============
+
+DVB-T frontends are supported by the ``dvb_ofdm_parameters`` structure:
+
+
+.. code-block:: c
+
+     struct dvb_ofdm_parameters {
+	 fe_bandwidth_t      bandwidth;
+	 fe_code_rate_t      code_rate_HP;  /* high priority stream code rate */
+	 fe_code_rate_t      code_rate_LP;  /* low priority stream code rate */
+	 fe_modulation_t     constellation; /* modulation type (see above) */
+	 fe_transmit_mode_t  transmission_mode;
+	 fe_guard_interval_t guard_interval;
+	 fe_hierarchy_t      hierarchy_information;
+     };
diff --git a/Documentation/userspace-api/media/dvb/dvbapi.rst b/Documentation/userspace-api/media/dvb/dvbapi.rst
new file mode 100644
index 000000000..1dda69343
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dvbapi.rst
@@ -0,0 +1,118 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. include:: <isonum.txt>
+
+.. _dvbapi:
+
+########################
+Part II - Digital TV API
+########################
+
+.. note::
+
+   This API is also known as Linux **DVB API**.
+
+   It it was originally written to support the European digital TV
+   standard (DVB), and later extended to support all digital TV standards.
+
+   In order to avoid confusion, within this document, it was opted to refer to
+   it, and to associated hardware as **Digital TV**.
+
+   The word **DVB** is reserved to be used for:
+
+     - the Digital TV API version
+       (e. g. DVB API version 3 or DVB API version 5);
+     - digital TV data types (enums, structs, defines, etc);
+     - digital TV device nodes (``/dev/dvb/...``);
+     - the European DVB standard.
+
+**Version 5.10**
+
+.. only:: html
+
+   .. class:: toc-title
+
+        Table of Contents
+
+.. toctree::
+    :maxdepth: 5
+    :numbered:
+
+    intro
+    frontend
+    demux
+    ca
+    net
+    legacy_dvb_apis
+    examples
+    headers
+
+
+**********************
+Revision and Copyright
+**********************
+
+Authors:
+
+- J. K. Metzler, Ralph <rjkm@metzlerbros.de>
+
+ - Original author of the Digital TV API documentation.
+
+- O. C. Metzler, Marcus <rjkm@metzlerbros.de>
+
+ - Original author of the Digital TV API documentation.
+
+- Carvalho Chehab, Mauro <mchehab+samsung@kernel.org>
+
+ - Ported document to Docbook XML, addition of DVBv5 API, documentation gaps fix.
+
+**Copyright** |copy| 2002-2003 : Convergence GmbH
+
+**Copyright** |copy| 2009-2017 : Mauro Carvalho Chehab
+
+****************
+Revision History
+****************
+
+:revision: 2.2.0 / 2017-09-01 (*mcc*)
+
+Most gaps between the uAPI document and the Kernel implementation
+got fixed for the non-legacy API.
+
+:revision: 2.1.0 / 2015-05-29 (*mcc*)
+
+DocBook improvements and cleanups, in order to document the system calls
+on a more standard way and provide more description about the current
+Digital TV API.
+
+:revision: 2.0.4 / 2011-05-06 (*mcc*)
+
+Add more information about DVBv5 API, better describing the frontend
+GET/SET props ioctl's.
+
+
+:revision: 2.0.3 / 2010-07-03 (*mcc*)
+
+Add some frontend capabilities flags, present on kernel, but missing at
+the specs.
+
+
+:revision: 2.0.2 / 2009-10-25 (*mcc*)
+
+documents FE_SET_FRONTEND_TUNE_MODE and
+FE_DISHETWORK_SEND_LEGACY_CMD ioctls.
+
+
+:revision: 2.0.1 / 2009-09-16 (*mcc*)
+
+Added ISDB-T test originally written by Patrick Boettcher
+
+
+:revision: 2.0.0 / 2009-09-06 (*mcc*)
+
+Conversion from LaTex to DocBook XML. The contents is the same as the
+original LaTex version.
+
+
+:revision: 1.0.0 / 2003-07-24 (*rjkm*)
+
+Initial revision on LaTEX.
diff --git a/Documentation/userspace-api/media/dvb/dvbproperty.rst b/Documentation/userspace-api/media/dvb/dvbproperty.rst
new file mode 100644
index 000000000..981da20af
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dvbproperty.rst
@@ -0,0 +1,126 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _frontend-properties:
+
+**************
+Property types
+**************
+
+Tuning into a Digital TV physical channel and starting decoding it
+requires changing a set of parameters, in order to control the tuner,
+the demodulator, the Linear Low-noise Amplifier (LNA) and to set the
+antenna subsystem via Satellite Equipment Control - SEC (on satellite
+systems). The actual parameters are specific to each particular digital
+TV standards, and may change as the digital TV specs evolves.
+
+In the past (up to DVB API version 3 - DVBv3), the strategy used was to have a
+union with the parameters needed to tune for DVB-S, DVB-C, DVB-T and
+ATSC delivery systems grouped there. The problem is that, as the second
+generation standards appeared, the size of such union was not big
+enough to group the structs that would be required for those new
+standards. Also, extending it would break userspace.
+
+So, the legacy union/struct based approach was deprecated, in favor
+of a properties set approach. On such approach,
+:ref:`FE_GET_PROPERTY and FE_SET_PROPERTY <FE_GET_PROPERTY>` are used
+to setup the frontend and read its status.
+
+The actual action is determined by a set of dtv_property cmd/data pairs.
+With one single ioctl, is possible to get/set up to 64 properties.
+
+This section describes the new and recommended way to set the frontend,
+with supports all digital TV delivery systems.
+
+.. note::
+
+   1. On Linux DVB API version 3, setting a frontend was done via
+      struct :c:type:`dvb_frontend_parameters`.
+
+   2. Don't use DVB API version 3 calls on hardware with supports
+      newer standards. Such API provides no support or a very limited
+      support to new standards and/or new hardware.
+
+   3. Nowadays, most frontends support multiple delivery systems.
+      Only with DVB API version 5 calls it is possible to switch between
+      the multiple delivery systems supported by a frontend.
+
+   4. DVB API version 5 is also called *S2API*, as the first
+      new standard added to it was DVB-S2.
+
+**Example**: in order to set the hardware to tune into a DVB-C channel
+at 651 kHz, modulated with 256-QAM, FEC 3/4 and symbol rate of 5.217
+Mbauds, those properties should be sent to
+:ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` ioctl:
+
+  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` = SYS_DVBC_ANNEX_A
+
+  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` = 651000000
+
+  :ref:`DTV_MODULATION <DTV-MODULATION>` = QAM_256
+
+  :ref:`DTV_INVERSION <DTV-INVERSION>` = INVERSION_AUTO
+
+  :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` = 5217000
+
+  :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` = FEC_3_4
+
+  :ref:`DTV_TUNE <DTV-TUNE>`
+
+The code that would that would do the above is show in
+:ref:`dtv-prop-example`.
+
+.. code-block:: c
+    :caption: Example: Setting digital TV frontend properties
+    :name: dtv-prop-example
+
+    #include <stdio.h>
+    #include <fcntl.h>
+    #include <sys/ioctl.h>
+    #include <linux/dvb/frontend.h>
+
+    static struct dtv_property props[] = {
+	{ .cmd = DTV_DELIVERY_SYSTEM, .u.data = SYS_DVBC_ANNEX_A },
+	{ .cmd = DTV_FREQUENCY,       .u.data = 651000000 },
+	{ .cmd = DTV_MODULATION,      .u.data = QAM_256 },
+	{ .cmd = DTV_INVERSION,       .u.data = INVERSION_AUTO },
+	{ .cmd = DTV_SYMBOL_RATE,     .u.data = 5217000 },
+	{ .cmd = DTV_INNER_FEC,       .u.data = FEC_3_4 },
+	{ .cmd = DTV_TUNE }
+    };
+
+    static struct dtv_properties dtv_prop = {
+	.num = 6, .props = props
+    };
+
+    int main(void)
+    {
+	int fd = open("/dev/dvb/adapter0/frontend0", O_RDWR);
+
+	if (!fd) {
+	    perror ("open");
+	    return -1;
+	}
+	if (ioctl(fd, FE_SET_PROPERTY, &dtv_prop) == -1) {
+	    perror("ioctl");
+	    return -1;
+	}
+	printf("Frontend set\\n");
+	return 0;
+    }
+
+.. attention:: While it is possible to directly call the Kernel code like the
+   above example, it is strongly recommended to use
+   `libdvbv5 <https://linuxtv.org/docs/libdvbv5/index.html>`__, as it
+   provides abstraction to work with the supported digital TV standards and
+   provides methods for usual operations like program scanning and to
+   read/write channel descriptor files.
+
+.. toctree::
+    :maxdepth: 1
+
+    fe_property_parameters
+    frontend-stat-properties
+    frontend-property-terrestrial-systems
+    frontend-property-cable-systems
+    frontend-property-satellite-systems
+    frontend-header
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new file mode 100644
index 000000000..87e68baa0
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dvbstb.svg
@@ -0,0 +1,17 @@
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+</svg>
diff --git a/Documentation/userspace-api/media/dvb/examples.rst b/Documentation/userspace-api/media/dvb/examples.rst
new file mode 100644
index 000000000..086587c65
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/examples.rst
@@ -0,0 +1,16 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dvb_examples:
+
+********
+Examples
+********
+
+In the past, we used to have a set of examples here. However, those
+examples got out of date and doesn't even compile nowadays.
+
+Also, nowadays, the best is to use the libdvbv5 DVB API nowadays,
+with is fully documented.
+
+Please refer to the `libdvbv5 <https://linuxtv.org/docs/libdvbv5/index.html>`__
+for updated/recommended examples.
diff --git a/Documentation/userspace-api/media/dvb/fe-bandwidth-t.rst b/Documentation/userspace-api/media/dvb/fe-bandwidth-t.rst
new file mode 100644
index 000000000..904b0c33a
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-bandwidth-t.rst
@@ -0,0 +1,74 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+******************
+Frontend bandwidth
+******************
+
+.. c:type:: fe_bandwidth
+
+.. flat-table:: enum fe_bandwidth
+    :header-rows:  1
+    :stub-columns: 0
+
+
+    -  .. row 1
+
+       -  ID
+
+       -  Description
+
+    -  .. row 2
+
+       -  .. _BANDWIDTH-AUTO:
+
+	  ``BANDWIDTH_AUTO``
+
+       -  Autodetect bandwidth (if supported)
+
+    -  .. row 3
+
+       -  .. _BANDWIDTH-1-712-MHZ:
+
+	  ``BANDWIDTH_1_712_MHZ``
+
+       -  1.712 MHz
+
+    -  .. row 4
+
+       -  .. _BANDWIDTH-5-MHZ:
+
+	  ``BANDWIDTH_5_MHZ``
+
+       -  5 MHz
+
+    -  .. row 5
+
+       -  .. _BANDWIDTH-6-MHZ:
+
+	  ``BANDWIDTH_6_MHZ``
+
+       -  6 MHz
+
+    -  .. row 6
+
+       -  .. _BANDWIDTH-7-MHZ:
+
+	  ``BANDWIDTH_7_MHZ``
+
+       -  7 MHz
+
+    -  .. row 7
+
+       -  .. _BANDWIDTH-8-MHZ:
+
+	  ``BANDWIDTH_8_MHZ``
+
+       -  8 MHz
+
+    -  .. row 8
+
+       -  .. _BANDWIDTH-10-MHZ:
+
+	  ``BANDWIDTH_10_MHZ``
+
+       -  10 MHz
diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-recv-slave-reply.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-recv-slave-reply.rst
new file mode 100644
index 000000000..d9be817f0
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-diseqc-recv-slave-reply.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_DISEQC_RECV_SLAVE_REPLY:
+
+********************************
+ioctl FE_DISEQC_RECV_SLAVE_REPLY
+********************************
+
+Name
+====
+
+FE_DISEQC_RECV_SLAVE_REPLY - Receives reply from a DiSEqC 2.0 command
+
+Synopsis
+========
+
+.. c:macro:: FE_DISEQC_RECV_SLAVE_REPLY
+
+``int ioctl(int fd, FE_DISEQC_RECV_SLAVE_REPLY, struct dvb_diseqc_slave_reply *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    pointer to struct :c:type:`dvb_diseqc_slave_reply`.
+
+Description
+===========
+
+Receives reply from a DiSEqC 2.0 command.
+
+The received message is stored at the buffer pointed by ``argp``.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst
new file mode 100644
index 000000000..d36f7d115
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst
@@ -0,0 +1,45 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_DISEQC_RESET_OVERLOAD:
+
+******************************
+ioctl FE_DISEQC_RESET_OVERLOAD
+******************************
+
+Name
+====
+
+FE_DISEQC_RESET_OVERLOAD - Restores the power to the antenna subsystem, if it was powered off due - to power overload.
+
+Synopsis
+========
+
+.. c:macro:: FE_DISEQC_RESET_OVERLOAD
+
+``int ioctl(int fd, FE_DISEQC_RESET_OVERLOAD, NULL)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+Description
+===========
+
+If the bus has been automatically powered off due to power overload,
+this ioctl call restores the power to the bus. The call requires
+read/write access to the device. This call has no effect if the device
+is manually powered off. Not all Digital TV adapters support this ioctl.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-send-burst.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-send-burst.rst
new file mode 100644
index 000000000..8fb73ee29
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-diseqc-send-burst.rst
@@ -0,0 +1,50 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_DISEQC_SEND_BURST:
+
+**************************
+ioctl FE_DISEQC_SEND_BURST
+**************************
+
+Name
+====
+
+FE_DISEQC_SEND_BURST - Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection.
+
+Synopsis
+========
+
+.. c:macro:: FE_DISEQC_SEND_BURST
+
+``int ioctl(int fd, FE_DISEQC_SEND_BURST, enum fe_sec_mini_cmd tone)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``tone``
+    An integer enumered value described at :c:type:`fe_sec_mini_cmd`.
+
+Description
+===========
+
+This ioctl is used to set the generation of a 22kHz tone burst for mini
+DiSEqC satellite selection for 2x1 switches. This call requires
+read/write permissions.
+
+It provides support for what's specified at
+`Digital Satellite Equipment Control (DiSEqC) - Simple "ToneBurst" Detection Circuit specification. <http://www.eutelsat.com/files/contributed/satellites/pdf/Diseqc/associated%20docs/simple_tone_burst_detec.pdf>`__
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-send-master-cmd.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-send-master-cmd.rst
new file mode 100644
index 000000000..c97029def
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-diseqc-send-master-cmd.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_DISEQC_SEND_MASTER_CMD:
+
+*******************************
+ioctl FE_DISEQC_SEND_MASTER_CMD
+*******************************
+
+Name
+====
+
+FE_DISEQC_SEND_MASTER_CMD - Sends a DiSEqC command
+
+Synopsis
+========
+
+.. c:macro:: FE_DISEQC_SEND_MASTER_CMD
+
+``int ioctl(int fd, FE_DISEQC_SEND_MASTER_CMD, struct dvb_diseqc_master_cmd *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    pointer to struct
+    :c:type:`dvb_diseqc_master_cmd`
+
+Description
+===========
+
+Sends the DiSEqC command pointed by :c:type:`dvb_diseqc_master_cmd`
+to the antenna subsystem.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
diff --git a/Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst b/Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst
new file mode 100644
index 000000000..d1dba74c5
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst
@@ -0,0 +1,53 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_DISHNETWORK_SEND_LEGACY_CMD:
+
+******************************
+FE_DISHNETWORK_SEND_LEGACY_CMD
+******************************
+
+Name
+====
+
+FE_DISHNETWORK_SEND_LEGACY_CMD
+
+Synopsis
+========
+
+.. c:macro:: FE_DISHNETWORK_SEND_LEGACY_CMD
+
+``int ioctl(int fd, FE_DISHNETWORK_SEND_LEGACY_CMD, unsigned long cmd)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``cmd``
+    Sends the specified raw cmd to the dish via DISEqC.
+
+Description
+===========
+
+.. warning::
+   This is a very obscure legacy command, used only at stv0299
+   driver. Should not be used on newer drivers.
+
+It provides a non-standard method for selecting Diseqc voltage on the
+frontend, for Dish Network legacy switches.
+
+As support for this ioctl were added in 2004, this means that such
+dishes were already legacy in 2004.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst b/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst
new file mode 100644
index 000000000..40d7320f8
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst
@@ -0,0 +1,52 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_ENABLE_HIGH_LNB_VOLTAGE:
+
+********************************
+ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
+********************************
+
+Name
+====
+
+FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.
+
+Synopsis
+========
+
+.. c:macro:: FE_ENABLE_HIGH_LNB_VOLTAGE
+
+``int ioctl(int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``high``
+    Valid flags:
+
+    -  0 - normal 13V and 18V.
+
+    -  >0 - enables slightly higher voltages instead of 13/18V, in order
+       to compensate for long antenna cables.
+
+Description
+===========
+
+Select output DC level between normal LNBf voltages or higher LNBf
+voltages between 0 (normal) or a value grater than 0 for higher
+voltages.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-get-event.rst b/Documentation/userspace-api/media/dvb/fe-get-event.rst
new file mode 100644
index 000000000..f63029eca
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-get-event.rst
@@ -0,0 +1,67 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_GET_EVENT:
+
+************
+FE_GET_EVENT
+************
+
+Name
+====
+
+FE_GET_EVENT
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+========
+
+.. c:macro:: FE_GET_EVENT
+
+``int ioctl(int fd, FE_GET_EVENT, struct dvb_frontend_event *ev)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``ev``
+    Points to the location where the event, if any, is to be stored.
+
+Description
+===========
+
+This ioctl call returns a frontend event if available. If an event is
+not available, the behavior depends on whether the device is in blocking
+or non-blocking mode. In the latter case, the call fails immediately
+with errno set to ``EWOULDBLOCK``. In the former case, the call blocks until
+an event becomes available.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EWOULDBLOCK``
+
+       -  There is no event pending, and the device is in non-blocking mode.
+
+    -  .. row 2
+
+       -  ``EOVERFLOW``
+
+       -  Overflow in event queue - one or more events were lost.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-get-frontend.rst b/Documentation/userspace-api/media/dvb/fe-get-frontend.rst
new file mode 100644
index 000000000..40700533e
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-get-frontend.rst
@@ -0,0 +1,58 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_GET_FRONTEND:
+
+***************
+FE_GET_FRONTEND
+***************
+
+Name
+====
+
+FE_GET_FRONTEND
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+========
+
+.. c:macro:: FE_GET_FRONTEND
+
+``int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``p``
+    Points to parameters for tuning operation.
+
+Description
+===========
+
+This ioctl call queries the currently effective frontend parameters. For
+this command, read-only access to the device is sufficient.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EINVAL``
+
+       -  Maximum supported symbol rate reached.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-get-info.rst b/Documentation/userspace-api/media/dvb/fe-get-info.rst
new file mode 100644
index 000000000..2e5f02098
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-get-info.rst
@@ -0,0 +1,59 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_GET_INFO:
+
+*****************
+ioctl FE_GET_INFO
+*****************
+
+Name
+====
+
+FE_GET_INFO - Query Digital TV frontend capabilities and returns information
+about the - front-end. This call only requires read-only access to the device.
+
+Synopsis
+========
+
+.. c:macro:: FE_GET_INFO
+
+``int ioctl(int fd, FE_GET_INFO, struct dvb_frontend_info *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    pointer to struct :c:type:`dvb_frontend_info`
+
+Description
+===========
+
+All Digital TV frontend devices support the :ref:`FE_GET_INFO` ioctl. It is
+used to identify kernel devices compatible with this specification and to
+obtain information about driver and hardware capabilities. The ioctl
+takes a pointer to dvb_frontend_info which is filled by the driver.
+When the driver is not compatible with this specification the ioctl
+returns an error.
+
+frontend capabilities
+=====================
+
+Capabilities describe what a frontend can do. Some capabilities are
+supported only on some specific frontend types.
+
+The frontend capabilities are described at :c:type:`fe_caps`.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-get-property.rst b/Documentation/userspace-api/media/dvb/fe-get-property.rst
new file mode 100644
index 000000000..29363dc4a
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-get-property.rst
@@ -0,0 +1,75 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_GET_PROPERTY:
+
+**************************************
+ioctl FE_SET_PROPERTY, FE_GET_PROPERTY
+**************************************
+
+Name
+====
+
+FE_SET_PROPERTY - FE_GET_PROPERTY - FE_SET_PROPERTY sets one or more frontend properties. - FE_GET_PROPERTY returns one or more frontend properties.
+
+Synopsis
+========
+
+.. c:macro:: FE_GET_PROPERTY
+
+``int ioctl(int fd, FE_GET_PROPERTY, struct dtv_properties *argp)``
+
+.. c:macro:: FE_SET_PROPERTY
+
+``int ioctl(int fd, FE_SET_PROPERTY, struct dtv_properties *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`dtv_properties`.
+
+Description
+===========
+
+All Digital TV frontend devices support the ``FE_SET_PROPERTY`` and
+``FE_GET_PROPERTY`` ioctls. The supported properties and statistics
+depends on the delivery system and on the device:
+
+-  ``FE_SET_PROPERTY:``
+
+   -  This ioctl is used to set one or more frontend properties.
+
+   -  This is the basic command to request the frontend to tune into
+      some frequency and to start decoding the digital TV signal.
+
+   -  This call requires read/write access to the device.
+
+.. note::
+
+   At return, the values aren't updated to reflect the actual
+   parameters used. If the actual parameters are needed, an explicit
+   call to ``FE_GET_PROPERTY`` is needed.
+
+-  ``FE_GET_PROPERTY:``
+
+   -  This ioctl is used to get properties and statistics from the
+      frontend.
+
+   -  No properties are changed, and statistics aren't reset.
+
+   -  This call only requires read-only access to the device.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-read-ber.rst b/Documentation/userspace-api/media/dvb/fe-read-ber.rst
new file mode 100644
index 000000000..f33f1dd20
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-read-ber.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_READ_BER:
+
+***********
+FE_READ_BER
+***********
+
+Name
+====
+
+FE_READ_BER
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+========
+
+.. c:macro:: FE_READ_BER
+
+``int ioctl(int fd, FE_READ_BER, uint32_t *ber)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``ber``
+    The bit error rate is stored into \*ber.
+
+Description
+===========
+
+This ioctl call returns the bit error rate for the signal currently
+received/demodulated by the front-end. For this command, read-only
+access to the device is sufficient.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-read-signal-strength.rst b/Documentation/userspace-api/media/dvb/fe-read-signal-strength.rst
new file mode 100644
index 000000000..2b7d06145
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-read-signal-strength.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_READ_SIGNAL_STRENGTH:
+
+***********************
+FE_READ_SIGNAL_STRENGTH
+***********************
+
+Name
+====
+
+FE_READ_SIGNAL_STRENGTH
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+========
+
+.. c:macro:: FE_READ_SIGNAL_STRENGTH
+
+``int ioctl(int fd, FE_READ_SIGNAL_STRENGTH, uint16_t *strength)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``strength``
+    The signal strength value is stored into \*strength.
+
+Description
+===========
+
+This ioctl call returns the signal strength value for the signal
+currently received by the front-end. For this command, read-only access
+to the device is sufficient.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-read-snr.rst b/Documentation/userspace-api/media/dvb/fe-read-snr.rst
new file mode 100644
index 000000000..e44e559ab
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-read-snr.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_READ_SNR:
+
+***********
+FE_READ_SNR
+***********
+
+Name
+====
+
+FE_READ_SNR
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+========
+
+.. c:macro:: FE_READ_SNR
+
+``int ioctl(int fd, FE_READ_SNR, int16_t *snr)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``snr``
+    The signal-to-noise ratio is stored into \*snr.
+
+Description
+===========
+
+This ioctl call returns the signal-to-noise ratio for the signal
+currently received by the front-end. For this command, read-only access
+to the device is sufficient.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-read-status.rst b/Documentation/userspace-api/media/dvb/fe-read-status.rst
new file mode 100644
index 000000000..75c6ee60a
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-read-status.rst
@@ -0,0 +1,62 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_READ_STATUS:
+
+********************
+ioctl FE_READ_STATUS
+********************
+
+Name
+====
+
+FE_READ_STATUS - Returns status information about the front-end. This call only requires - read-only access to the device
+
+Synopsis
+========
+
+.. c:macro:: FE_READ_STATUS
+
+``int ioctl(int fd, FE_READ_STATUS, unsigned int *status)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``status``
+    pointer to a bitmask integer filled with the values defined by enum
+    :c:type:`fe_status`.
+
+Description
+===========
+
+All Digital TV frontend devices support the ``FE_READ_STATUS`` ioctl. It is
+used to check about the locking status of the frontend after being
+tuned. The ioctl takes a pointer to an integer where the status will be
+written.
+
+.. note::
+
+   The size of status is actually sizeof(enum fe_status), with
+   varies according with the architecture. This needs to be fixed in the
+   future.
+
+int fe_status
+=============
+
+The fe_status parameter is used to indicate the current state and/or
+state changes of the frontend hardware. It is produced using the enum
+:c:type:`fe_status` values on a bitmask
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-read-uncorrected-blocks.rst b/Documentation/userspace-api/media/dvb/fe-read-uncorrected-blocks.rst
new file mode 100644
index 000000000..653cd99a6
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-read-uncorrected-blocks.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_READ_UNCORRECTED_BLOCKS:
+
+**************************
+FE_READ_UNCORRECTED_BLOCKS
+**************************
+
+Name
+====
+
+FE_READ_UNCORRECTED_BLOCKS
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+========
+
+.. c:macro:: FE_READ_UNCORRECTED_BLOCKS
+
+``int ioctl(int fd, FE_READ_UNCORRECTED_BLOCKS, uint32_t *ublocks)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``ublocks``
+    The total number of uncorrected blocks seen by the driver so far.
+
+Description
+===========
+
+This ioctl call returns the number of uncorrected blocks detected by the
+device driver during its lifetime. For meaningful measurements, the
+increment in block count during a specific time interval should be
+calculated. For this command, read-only access to the device is
+sufficient.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst b/Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst
new file mode 100644
index 000000000..56923c1a6
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst
@@ -0,0 +1,55 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_SET_FRONTEND_TUNE_MODE:
+
+*******************************
+ioctl FE_SET_FRONTEND_TUNE_MODE
+*******************************
+
+Name
+====
+
+FE_SET_FRONTEND_TUNE_MODE - Allow setting tuner mode flags to the frontend.
+
+Synopsis
+========
+
+.. c:macro:: FE_SET_FRONTEND_TUNE_MODE
+
+``int ioctl(int fd, FE_SET_FRONTEND_TUNE_MODE, unsigned int flags)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``flags``
+    Valid flags:
+
+    -  0 - normal tune mode
+
+    -  ``FE_TUNE_MODE_ONESHOT`` - When set, this flag will disable any
+       zigzagging or other "normal" tuning behaviour. Additionally,
+       there will be no automatic monitoring of the lock status, and
+       hence no frontend events will be generated. If a frontend device
+       is closed, this flag will be automatically turned off when the
+       device is reopened read-write.
+
+Description
+===========
+
+Allow setting tuner mode flags to the frontend, between 0 (normal) or
+``FE_TUNE_MODE_ONESHOT`` mode
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-set-frontend.rst b/Documentation/userspace-api/media/dvb/fe-set-frontend.rst
new file mode 100644
index 000000000..d1b857632
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-set-frontend.rst
@@ -0,0 +1,68 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_SET_FRONTEND:
+
+***************
+FE_SET_FRONTEND
+***************
+
+.. attention:: This ioctl is deprecated.
+
+Name
+====
+
+FE_SET_FRONTEND
+
+Synopsis
+========
+
+.. c:macro:: FE_SET_FRONTEND
+
+``int ioctl(int fd, FE_SET_FRONTEND, struct dvb_frontend_parameters *p)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``p``
+    Points to parameters for tuning operation.
+
+Description
+===========
+
+This ioctl call starts a tuning operation using specified parameters.
+The result of this call will be successful if the parameters were valid
+and the tuning could be initiated. The result of the tuning operation in
+itself, however, will arrive asynchronously as an event (see
+documentation for :ref:`FE_GET_EVENT` and
+FrontendEvent.) If a new :ref:`FE_SET_FRONTEND`
+operation is initiated before the previous one was completed, the
+previous operation will be aborted in favor of the new one. This command
+requires read/write access to the device.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  .. row 1
+
+       -  ``EINVAL``
+
+       -  Maximum supported symbol rate reached.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-set-tone.rst b/Documentation/userspace-api/media/dvb/fe-set-tone.rst
new file mode 100644
index 000000000..9f44bf946
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-set-tone.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_SET_TONE:
+
+*****************
+ioctl FE_SET_TONE
+*****************
+
+Name
+====
+
+FE_SET_TONE - Sets/resets the generation of the continuous 22kHz tone.
+
+Synopsis
+========
+
+.. c:macro:: FE_SET_TONE
+
+``int ioctl(int fd, FE_SET_TONE, enum fe_sec_tone_mode tone)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``tone``
+    an integer enumered value described at :c:type:`fe_sec_tone_mode`
+
+Description
+===========
+
+This ioctl is used to set the generation of the continuous 22kHz tone.
+This call requires read/write permissions.
+
+Usually, satellite antenna subsystems require that the digital TV device
+to send a 22kHz tone in order to select between high/low band on some
+dual-band LNBf. It is also used to send signals to DiSEqC equipment, but
+this is done using the DiSEqC ioctls.
+
+.. attention:: If more than one device is connected to the same antenna,
+   setting a tone may interfere on other devices, as they may lose the
+   capability of selecting the band. So, it is recommended that applications
+   would change to SEC_TONE_OFF when the device is not used.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-set-voltage.rst b/Documentation/userspace-api/media/dvb/fe-set-voltage.rst
new file mode 100644
index 000000000..c66771830
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-set-voltage.rst
@@ -0,0 +1,60 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _FE_SET_VOLTAGE:
+
+********************
+ioctl FE_SET_VOLTAGE
+********************
+
+Name
+====
+
+FE_SET_VOLTAGE - Allow setting the DC level sent to the antenna subsystem.
+
+Synopsis
+========
+
+.. c:macro:: FE_SET_VOLTAGE
+
+``int ioctl(int fd, FE_SET_VOLTAGE, enum fe_sec_voltage voltage)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``voltage``
+    an integer enumered value described at :c:type:`fe_sec_voltage`
+
+Description
+===========
+
+This ioctl allows to set the DC voltage level sent through the antenna
+cable to 13V, 18V or off.
+
+Usually, a satellite antenna subsystems require that the digital TV
+device to send a DC voltage to feed power to the LNBf. Depending on the
+LNBf type, the polarization or the intermediate frequency (IF) of the
+LNBf can controlled by the voltage level. Other devices (for example,
+the ones that implement DISEqC and multipoint LNBf's don't need to
+control the voltage level, provided that either 13V or 18V is sent to
+power up the LNBf.
+
+.. attention:: if more than one device is connected to the same antenna,
+   setting a voltage level may interfere on other devices, as they may lose
+   the capability of setting polarization or IF. So, on those cases, setting
+   the voltage to SEC_VOLTAGE_OFF while the device is not is used is
+   recommended.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/fe-type-t.rst b/Documentation/userspace-api/media/dvb/fe-type-t.rst
new file mode 100644
index 000000000..e8499d482
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe-type-t.rst
@@ -0,0 +1,91 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+*************
+Frontend type
+*************
+
+For historical reasons, frontend types are named by the type of
+modulation used in transmission. The fontend types are given by
+fe_type_t type, defined as:
+
+
+.. c:type:: fe_type
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. flat-table:: Frontend types
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       3 1 4
+
+
+    -  .. row 1
+
+       -  fe_type
+
+       -  Description
+
+       -  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` equivalent
+	  type
+
+    -  .. row 2
+
+       -  .. _FE-QPSK:
+
+	  ``FE_QPSK``
+
+       -  For DVB-S standard
+
+       -  ``SYS_DVBS``
+
+    -  .. row 3
+
+       -  .. _FE-QAM:
+
+	  ``FE_QAM``
+
+       -  For DVB-C annex A standard
+
+       -  ``SYS_DVBC_ANNEX_A``
+
+    -  .. row 4
+
+       -  .. _FE-OFDM:
+
+	  ``FE_OFDM``
+
+       -  For DVB-T standard
+
+       -  ``SYS_DVBT``
+
+    -  .. row 5
+
+       -  .. _FE-ATSC:
+
+	  ``FE_ATSC``
+
+       -  For ATSC standard (terrestrial) or for DVB-C Annex B (cable) used
+	  in US.
+
+       -  ``SYS_ATSC`` (terrestrial) or ``SYS_DVBC_ANNEX_B`` (cable)
+
+
+Newer formats like DVB-S2, ISDB-T, ISDB-S and DVB-T2 are not described
+at the above, as they're supported via the new
+:ref:`FE_GET_PROPERTY/FE_GET_SET_PROPERTY <FE_GET_PROPERTY>`
+ioctl's, using the :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+parameter.
+
+In the old days, struct :c:type:`dvb_frontend_info`
+used to contain ``fe_type_t`` field to indicate the delivery systems,
+filled with either ``FE_QPSK, FE_QAM, FE_OFDM`` or ``FE_ATSC``. While this
+is still filled to keep backward compatibility, the usage of this field
+is deprecated, as it can report just one delivery system, but some
+devices support multiple delivery systems. Please use
+:ref:`DTV_ENUM_DELSYS <DTV-ENUM-DELSYS>` instead.
+
+On devices that support multiple delivery systems, struct
+:c:type:`dvb_frontend_info`::``fe_type_t`` is
+filled with the currently standard, as selected by the last call to
+:ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` using the
+:ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` property.
diff --git a/Documentation/userspace-api/media/dvb/fe_property_parameters.rst b/Documentation/userspace-api/media/dvb/fe_property_parameters.rst
new file mode 100644
index 000000000..ecd84a879
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe_property_parameters.rst
@@ -0,0 +1,1007 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _fe_property_parameters:
+
+******************************
+Digital TV property parameters
+******************************
+
+There are several different Digital TV parameters that can be used by
+:ref:`FE_SET_PROPERTY and FE_GET_PROPERTY ioctls<FE_GET_PROPERTY>`.
+This section describes each of them. Please notice, however, that only
+a subset of them are needed to setup a frontend.
+
+
+.. _DTV-UNDEFINED:
+
+DTV_UNDEFINED
+=============
+
+Used internally. A GET/SET operation for it won't change or return
+anything.
+
+
+.. _DTV-TUNE:
+
+DTV_TUNE
+========
+
+Interpret the cache of data, build either a traditional frontend
+tunerequest so we can pass validation in the ``FE_SET_FRONTEND`` ioctl.
+
+
+.. _DTV-CLEAR:
+
+DTV_CLEAR
+=========
+
+Reset a cache of data specific to the frontend here. This does not
+effect hardware.
+
+
+.. _DTV-FREQUENCY:
+
+DTV_FREQUENCY
+=============
+
+Frequency of the digital TV transponder/channel.
+
+.. note::
+
+  #. For satellite delivery systems, the frequency is in kHz.
+
+  #. For cable and terrestrial delivery systems, the frequency is in
+     Hz.
+
+  #. On most delivery systems, the frequency is the center frequency
+     of the transponder/channel. The exception is for ISDB-T, where
+     the main carrier has a 1/7 offset from the center.
+
+  #. For ISDB-T, the channels are usually transmitted with an offset of
+     about 143kHz. E.g. a valid frequency could be 474,143 kHz. The
+     stepping is  bound to the bandwidth of the channel which is
+     typically 6MHz.
+
+  #. In ISDB-Tsb, the channel consists of only one or three segments the
+     frequency step is 429kHz, 3*429 respectively.
+
+
+.. _DTV-MODULATION:
+
+DTV_MODULATION
+==============
+
+Specifies the frontend modulation type for delivery systems that
+supports more multiple modulations.
+
+The modulation can be one of the types defined by enum :c:type:`fe_modulation`.
+
+Most of the digital TV standards offers more than one possible
+modulation type.
+
+The table below presents a summary of the types of modulation types
+supported by each delivery system, as currently defined by specs.
+
+======================= =======================================================
+Standard		Modulation types
+======================= =======================================================
+ATSC (version 1)	8-VSB and 16-VSB.
+DMTB			4-QAM, 16-QAM, 32-QAM, 64-QAM and 4-QAM-NR.
+DVB-C Annex A/C		16-QAM, 32-QAM, 64-QAM and 256-QAM.
+DVB-C Annex B		64-QAM.
+DVB-T			QPSK, 16-QAM and 64-QAM.
+DVB-T2			QPSK, 16-QAM, 64-QAM and 256-QAM.
+DVB-S			No need to set. It supports only QPSK.
+DVB-S2			QPSK, 8-PSK, 16-APSK and 32-APSK.
+ISDB-T			QPSK, DQPSK, 16-QAM and 64-QAM.
+ISDB-S			8-PSK, QPSK and BPSK.
+======================= =======================================================
+
+.. note::
+
+   Please notice that some of the above modulation types may not be
+   defined currently at the Kernel. The reason is simple: no driver
+   needed such definition yet.
+
+
+.. _DTV-BANDWIDTH-HZ:
+
+DTV_BANDWIDTH_HZ
+================
+
+Bandwidth for the channel, in HZ.
+
+Should be set only for terrestrial delivery systems.
+
+Possible values: ``1712000``, ``5000000``, ``6000000``, ``7000000``,
+``8000000``, ``10000000``.
+
+======================= =======================================================
+Terrestrial Standard	Possible values for bandwidth
+======================= =======================================================
+ATSC (version 1)	No need to set. It is always 6MHz.
+DMTB			No need to set. It is always 8MHz.
+DVB-T			6MHz, 7MHz and 8MHz.
+DVB-T2			1.172 MHz, 5MHz, 6MHz, 7MHz, 8MHz and 10MHz
+ISDB-T			5MHz, 6MHz, 7MHz and 8MHz, although most places
+			use 6MHz.
+======================= =======================================================
+
+
+.. note::
+
+
+  #. For ISDB-Tsb, the bandwidth can vary depending on the number of
+     connected segments.
+
+     It can be easily derived from other parameters
+     (DTV_ISDBT_SB_SEGMENT_IDX, DTV_ISDBT_SB_SEGMENT_COUNT).
+
+  #. On Satellite and Cable delivery systems, the bandwidth depends on
+     the symbol rate. So, the Kernel will silently ignore any setting
+     :ref:`DTV-BANDWIDTH-HZ`. I will however fill it back with a
+     bandwidth estimation.
+
+     Such bandwidth estimation takes into account the symbol rate set with
+     :ref:`DTV-SYMBOL-RATE`, and the rolloff factor, with is fixed for
+     DVB-C and DVB-S.
+
+     For DVB-S2, the rolloff should also be set via :ref:`DTV-ROLLOFF`.
+
+
+.. _DTV-INVERSION:
+
+DTV_INVERSION
+=============
+
+Specifies if the frontend should do spectral inversion or not.
+
+The acceptable values are defined by :c:type:`fe_spectral_inversion`.
+
+
+.. _DTV-DISEQC-MASTER:
+
+DTV_DISEQC_MASTER
+=================
+
+Currently not implemented.
+
+
+.. _DTV-SYMBOL-RATE:
+
+DTV_SYMBOL_RATE
+===============
+
+Used on cable and satellite delivery systems.
+
+Digital TV symbol rate, in bauds (symbols/second).
+
+
+.. _DTV-INNER-FEC:
+
+DTV_INNER_FEC
+=============
+
+Used on cable and satellite delivery systems.
+
+The acceptable values are defined by :c:type:`fe_code_rate`.
+
+
+.. _DTV-VOLTAGE:
+
+DTV_VOLTAGE
+===========
+
+Used on satellite delivery systems.
+
+The voltage is usually used with non-DiSEqC capable LNBs to switch the
+polarzation (horizontal/vertical). When using DiSEqC epuipment this
+voltage has to be switched consistently to the DiSEqC commands as
+described in the DiSEqC spec.
+
+The acceptable values are defined by :c:type:`fe_sec_voltage`.
+
+
+.. _DTV-TONE:
+
+DTV_TONE
+========
+
+Currently not used.
+
+
+.. _DTV-PILOT:
+
+DTV_PILOT
+=========
+
+Used on DVB-S2.
+
+Sets DVB-S2 pilot.
+
+The acceptable values are defined by :c:type:`fe_pilot`.
+
+
+.. _DTV-ROLLOFF:
+
+DTV_ROLLOFF
+===========
+
+Used on DVB-S2.
+
+Sets DVB-S2 rolloff.
+
+The acceptable values are defined by :c:type:`fe_rolloff`.
+
+
+.. _DTV-DISEQC-SLAVE-REPLY:
+
+DTV_DISEQC_SLAVE_REPLY
+======================
+
+Currently not implemented.
+
+
+.. _DTV-FE-CAPABILITY-COUNT:
+
+DTV_FE_CAPABILITY_COUNT
+=======================
+
+Currently not implemented.
+
+
+.. _DTV-FE-CAPABILITY:
+
+DTV_FE_CAPABILITY
+=================
+
+Currently not implemented.
+
+
+.. _DTV-DELIVERY-SYSTEM:
+
+DTV_DELIVERY_SYSTEM
+===================
+
+Specifies the type of the delivery system.
+
+The acceptable values are defined by :c:type:`fe_delivery_system`.
+
+
+.. _DTV-ISDBT-PARTIAL-RECEPTION:
+
+DTV_ISDBT_PARTIAL_RECEPTION
+===========================
+
+Used only on ISDB.
+
+If ``DTV_ISDBT_SOUND_BROADCASTING`` is '0' this bit-field represents
+whether the channel is in partial reception mode or not.
+
+If '1' ``DTV_ISDBT_LAYERA_*`` values are assigned to the center segment
+and ``DTV_ISDBT_LAYERA_SEGMENT_COUNT`` has to be '1'.
+
+If in addition ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'
+``DTV_ISDBT_PARTIAL_RECEPTION`` represents whether this ISDB-Tsb channel
+is consisting of one segment and layer or three segments and two layers.
+
+Possible values: 0, 1, -1 (AUTO)
+
+
+.. _DTV-ISDBT-SOUND-BROADCASTING:
+
+DTV_ISDBT_SOUND_BROADCASTING
+============================
+
+Used only on ISDB.
+
+This field represents whether the other DTV_ISDBT_*-parameters are
+referring to an ISDB-T and an ISDB-Tsb channel. (See also
+``DTV_ISDBT_PARTIAL_RECEPTION``).
+
+Possible values: 0, 1, -1 (AUTO)
+
+
+.. _DTV-ISDBT-SB-SUBCHANNEL-ID:
+
+DTV_ISDBT_SB_SUBCHANNEL_ID
+==========================
+
+Used only on ISDB.
+
+This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'.
+
+(Note of the author: This might not be the correct description of the
+``SUBCHANNEL-ID`` in all details, but it is my understanding of the
+technical background needed to program a device)
+
+An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a
+set of connected ISDB-Tsb channels. In this set of channels every
+channel can be received independently. The number of connected ISDB-Tsb
+segment can vary, e.g. depending on the frequency spectrum bandwidth
+available.
+
+Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The
+broadcaster has several possibilities to put those channels in the air:
+Assuming a normal 13-segment ISDB-T spectrum he can align the 8 segments
+from position 1-8 to 5-13 or anything in between.
+
+The underlying layer of segments are subchannels: each segment is
+consisting of several subchannels with a predefined IDs. A sub-channel
+is used to help the demodulator to synchronize on the channel.
+
+An ISDB-T channel is always centered over all sub-channels. As for the
+example above, in ISDB-Tsb it is no longer as simple as that.
+
+``The DTV_ISDBT_SB_SUBCHANNEL_ID`` parameter is used to give the
+sub-channel ID of the segment to be demodulated.
+
+Possible values: 0 .. 41, -1 (AUTO)
+
+
+.. _DTV-ISDBT-SB-SEGMENT-IDX:
+
+DTV_ISDBT_SB_SEGMENT_IDX
+========================
+
+Used only on ISDB.
+
+This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'.
+
+``DTV_ISDBT_SB_SEGMENT_IDX`` gives the index of the segment to be
+demodulated for an ISDB-Tsb channel where several of them are
+transmitted in the connected manner.
+
+Possible values: 0 .. ``DTV_ISDBT_SB_SEGMENT_COUNT`` - 1
+
+Note: This value cannot be determined by an automatic channel search.
+
+
+.. _DTV-ISDBT-SB-SEGMENT-COUNT:
+
+DTV_ISDBT_SB_SEGMENT_COUNT
+==========================
+
+Used only on ISDB.
+
+This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'.
+
+``DTV_ISDBT_SB_SEGMENT_COUNT`` gives the total count of connected
+ISDB-Tsb channels.
+
+Possible values: 1 .. 13
+
+Note: This value cannot be determined by an automatic channel search.
+
+
+.. _isdb-hierq-layers:
+
+DTV-ISDBT-LAYER[A-C] parameters
+===============================
+
+Used only on ISDB.
+
+ISDB-T channels can be coded hierarchically. As opposed to DVB-T in
+ISDB-T hierarchical layers can be decoded simultaneously. For that
+reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders.
+
+ISDB-T has 3 hierarchical layers which each can use a part of the
+available segments. The total number of segments over all layers has to
+13 in ISDB-T.
+
+There are 3 parameter sets, for Layers A, B and C.
+
+
+.. _DTV-ISDBT-LAYER-ENABLED:
+
+DTV_ISDBT_LAYER_ENABLED
+-----------------------
+
+Used only on ISDB.
+
+Hierarchical reception in ISDB-T is achieved by enabling or disabling
+layers in the decoding process. Setting all bits of
+``DTV_ISDBT_LAYER_ENABLED`` to '1' forces all layers (if applicable) to
+be demodulated. This is the default.
+
+If the channel is in the partial reception mode
+(``DTV_ISDBT_PARTIAL_RECEPTION`` = 1) the central segment can be decoded
+independently of the other 12 segments. In that mode layer A has to have
+a ``SEGMENT_COUNT`` of 1.
+
+In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb according
+to ``DTV_ISDBT_PARTIAL_RECEPTION``. ``SEGMENT_COUNT`` must be filled
+accordingly.
+
+Only the values of the first 3 bits are used. Other bits will be silently ignored:
+
+``DTV_ISDBT_LAYER_ENABLED`` bit 0: layer A enabled
+
+``DTV_ISDBT_LAYER_ENABLED`` bit 1: layer B enabled
+
+``DTV_ISDBT_LAYER_ENABLED`` bit 2: layer C enabled
+
+``DTV_ISDBT_LAYER_ENABLED`` bits 3-31: unused
+
+
+.. _DTV-ISDBT-LAYER-FEC:
+
+DTV_ISDBT_LAYER[A-C]_FEC
+------------------------
+
+Used only on ISDB.
+
+The Forward Error Correction mechanism used by a given ISDB Layer, as
+defined by :c:type:`fe_code_rate`.
+
+
+Possible values are: ``FEC_AUTO``, ``FEC_1_2``, ``FEC_2_3``, ``FEC_3_4``,
+``FEC_5_6``, ``FEC_7_8``
+
+
+.. _DTV-ISDBT-LAYER-MODULATION:
+
+DTV_ISDBT_LAYER[A-C]_MODULATION
+-------------------------------
+
+Used only on ISDB.
+
+The modulation used by a given ISDB Layer, as defined by
+:c:type:`fe_modulation`.
+
+Possible values are: ``QAM_AUTO``, ``QPSK``, ``QAM_16``, ``QAM_64``, ``DQPSK``
+
+.. note::
+
+   #. If layer C is ``DQPSK``, then layer B has to be ``DQPSK``.
+
+   #. If layer B is ``DQPSK`` and ``DTV_ISDBT_PARTIAL_RECEPTION``\ = 0,
+      then layer has to be ``DQPSK``.
+
+
+.. _DTV-ISDBT-LAYER-SEGMENT-COUNT:
+
+DTV_ISDBT_LAYER[A-C]_SEGMENT_COUNT
+----------------------------------
+
+Used only on ISDB.
+
+Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)
+
+Note: Truth table for ``DTV_ISDBT_SOUND_BROADCASTING`` and
+``DTV_ISDBT_PARTIAL_RECEPTION`` and ``LAYER[A-C]_SEGMENT_COUNT``
+
+.. _isdbt-layer_seg-cnt-table:
+
+.. flat-table:: Truth table for ISDB-T Sound Broadcasting
+    :header-rows:  1
+    :stub-columns: 0
+
+
+    -  .. row 1
+
+       -  Partial Reception
+
+       -  Sound Broadcasting
+
+       -  Layer A width
+
+       -  Layer B width
+
+       -  Layer C width
+
+       -  total width
+
+    -  .. row 2
+
+       -  0
+
+       -  0
+
+       -  1 .. 13
+
+       -  1 .. 13
+
+       -  1 .. 13
+
+       -  13
+
+    -  .. row 3
+
+       -  1
+
+       -  0
+
+       -  1
+
+       -  1 .. 13
+
+       -  1 .. 13
+
+       -  13
+
+    -  .. row 4
+
+       -  0
+
+       -  1
+
+       -  1
+
+       -  0
+
+       -  0
+
+       -  1
+
+    -  .. row 5
+
+       -  1
+
+       -  1
+
+       -  1
+
+       -  2
+
+       -  0
+
+       -  13
+
+
+
+.. _DTV-ISDBT-LAYER-TIME-INTERLEAVING:
+
+DTV_ISDBT_LAYER[A-C]_TIME_INTERLEAVING
+--------------------------------------
+
+Used only on ISDB.
+
+Valid values: 0, 1, 2, 4, -1 (AUTO)
+
+when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid.
+
+Note: The real time interleaving length depends on the mode (fft-size).
+The values here are referring to what can be found in the
+TMCC-structure, as shown in the table below.
+
+
+.. c:type:: isdbt_layer_interleaving_table
+
+.. flat-table:: ISDB-T time interleaving modes
+    :header-rows:  1
+    :stub-columns: 0
+
+
+    -  .. row 1
+
+       -  ``DTV_ISDBT_LAYER[A-C]_TIME_INTERLEAVING``
+
+       -  Mode 1 (2K FFT)
+
+       -  Mode 2 (4K FFT)
+
+       -  Mode 3 (8K FFT)
+
+    -  .. row 2
+
+       -  0
+
+       -  0
+
+       -  0
+
+       -  0
+
+    -  .. row 3
+
+       -  1
+
+       -  4
+
+       -  2
+
+       -  1
+
+    -  .. row 4
+
+       -  2
+
+       -  8
+
+       -  4
+
+       -  2
+
+    -  .. row 5
+
+       -  4
+
+       -  16
+
+       -  8
+
+       -  4
+
+
+
+.. _DTV-ATSCMH-FIC-VER:
+
+DTV_ATSCMH_FIC_VER
+------------------
+
+Used only on ATSC-MH.
+
+Version number of the FIC (Fast Information Channel) signaling data.
+
+FIC is used for relaying information to allow rapid service acquisition
+by the receiver.
+
+Possible values: 0, 1, 2, 3, ..., 30, 31
+
+
+.. _DTV-ATSCMH-PARADE-ID:
+
+DTV_ATSCMH_PARADE_ID
+--------------------
+
+Used only on ATSC-MH.
+
+Parade identification number
+
+A parade is a collection of up to eight MH groups, conveying one or two
+ensembles.
+
+Possible values: 0, 1, 2, 3, ..., 126, 127
+
+
+.. _DTV-ATSCMH-NOG:
+
+DTV_ATSCMH_NOG
+--------------
+
+Used only on ATSC-MH.
+
+Number of MH groups per MH subframe for a designated parade.
+
+Possible values: 1, 2, 3, 4, 5, 6, 7, 8
+
+
+.. _DTV-ATSCMH-TNOG:
+
+DTV_ATSCMH_TNOG
+---------------
+
+Used only on ATSC-MH.
+
+Total number of MH groups including all MH groups belonging to all MH
+parades in one MH subframe.
+
+Possible values: 0, 1, 2, 3, ..., 30, 31
+
+
+.. _DTV-ATSCMH-SGN:
+
+DTV_ATSCMH_SGN
+--------------
+
+Used only on ATSC-MH.
+
+Start group number.
+
+Possible values: 0, 1, 2, 3, ..., 14, 15
+
+
+.. _DTV-ATSCMH-PRC:
+
+DTV_ATSCMH_PRC
+--------------
+
+Used only on ATSC-MH.
+
+Parade repetition cycle.
+
+Possible values: 1, 2, 3, 4, 5, 6, 7, 8
+
+
+.. _DTV-ATSCMH-RS-FRAME-MODE:
+
+DTV_ATSCMH_RS_FRAME_MODE
+------------------------
+
+Used only on ATSC-MH.
+
+Reed Solomon (RS) frame mode.
+
+The acceptable values are defined by :c:type:`atscmh_rs_frame_mode`.
+
+
+.. _DTV-ATSCMH-RS-FRAME-ENSEMBLE:
+
+DTV_ATSCMH_RS_FRAME_ENSEMBLE
+----------------------------
+
+Used only on ATSC-MH.
+
+Reed Solomon(RS) frame ensemble.
+
+The acceptable values are defined by :c:type:`atscmh_rs_frame_ensemble`.
+
+
+.. _DTV-ATSCMH-RS-CODE-MODE-PRI:
+
+DTV_ATSCMH_RS_CODE_MODE_PRI
+---------------------------
+
+Used only on ATSC-MH.
+
+Reed Solomon (RS) code mode (primary).
+
+The acceptable values are defined by :c:type:`atscmh_rs_code_mode`.
+
+
+.. _DTV-ATSCMH-RS-CODE-MODE-SEC:
+
+DTV_ATSCMH_RS_CODE_MODE_SEC
+---------------------------
+
+Used only on ATSC-MH.
+
+Reed Solomon (RS) code mode (secondary).
+
+The acceptable values are defined by :c:type:`atscmh_rs_code_mode`.
+
+
+.. _DTV-ATSCMH-SCCC-BLOCK-MODE:
+
+DTV_ATSCMH_SCCC_BLOCK_MODE
+--------------------------
+
+Used only on ATSC-MH.
+
+Series Concatenated Convolutional Code Block Mode.
+
+The acceptable values are defined by :c:type:`atscmh_sccc_block_mode`.
+
+
+.. _DTV-ATSCMH-SCCC-CODE-MODE-A:
+
+DTV_ATSCMH_SCCC_CODE_MODE_A
+---------------------------
+
+Used only on ATSC-MH.
+
+Series Concatenated Convolutional Code Rate.
+
+The acceptable values are defined by :c:type:`atscmh_sccc_code_mode`.
+
+.. _DTV-ATSCMH-SCCC-CODE-MODE-B:
+
+DTV_ATSCMH_SCCC_CODE_MODE_B
+---------------------------
+
+Used only on ATSC-MH.
+
+Series Concatenated Convolutional Code Rate.
+
+Possible values are the same as documented on enum
+:c:type:`atscmh_sccc_code_mode`.
+
+
+.. _DTV-ATSCMH-SCCC-CODE-MODE-C:
+
+DTV_ATSCMH_SCCC_CODE_MODE_C
+---------------------------
+
+Used only on ATSC-MH.
+
+Series Concatenated Convolutional Code Rate.
+
+Possible values are the same as documented on enum
+:c:type:`atscmh_sccc_code_mode`.
+
+
+.. _DTV-ATSCMH-SCCC-CODE-MODE-D:
+
+DTV_ATSCMH_SCCC_CODE_MODE_D
+---------------------------
+
+Used only on ATSC-MH.
+
+Series Concatenated Convolutional Code Rate.
+
+Possible values are the same as documented on enum
+:c:type:`atscmh_sccc_code_mode`.
+
+
+.. _DTV-API-VERSION:
+
+DTV_API_VERSION
+===============
+
+Returns the major/minor version of the Digital TV API
+
+
+.. _DTV-CODE-RATE-HP:
+
+DTV_CODE_RATE_HP
+================
+
+Used on terrestrial transmissions.
+
+The acceptable values are defined by :c:type:`fe_transmit_mode`.
+
+
+.. _DTV-CODE-RATE-LP:
+
+DTV_CODE_RATE_LP
+================
+
+Used on terrestrial transmissions.
+
+The acceptable values are defined by :c:type:`fe_transmit_mode`.
+
+
+.. _DTV-GUARD-INTERVAL:
+
+DTV_GUARD_INTERVAL
+==================
+
+The acceptable values are defined by :c:type:`fe_guard_interval`.
+
+.. note::
+
+   #. If ``DTV_GUARD_INTERVAL`` is set the ``GUARD_INTERVAL_AUTO`` the
+      hardware will try to find the correct guard interval (if capable) and
+      will use TMCC to fill in the missing parameters.
+   #. Intervals ``GUARD_INTERVAL_1_128``, ``GUARD_INTERVAL_19_128``
+      and ``GUARD_INTERVAL_19_256`` are used only for DVB-T2 at
+      present.
+   #. Intervals ``GUARD_INTERVAL_PN420``, ``GUARD_INTERVAL_PN595`` and
+      ``GUARD_INTERVAL_PN945`` are used only for DMTB at the present.
+      On such standard, only those intervals and ``GUARD_INTERVAL_AUTO``
+      are valid.
+
+.. _DTV-TRANSMISSION-MODE:
+
+DTV_TRANSMISSION_MODE
+=====================
+
+
+Used only on OFTM-based standards, e. g. DVB-T/T2, ISDB-T, DTMB.
+
+Specifies the FFT size (with corresponds to the approximate number of
+carriers) used by the standard.
+
+The acceptable values are defined by :c:type:`fe_transmit_mode`.
+
+.. note::
+
+   #. ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called
+      **mode** on such standard, and are numbered from 1 to 3:
+
+      ====	========	========================
+      Mode	FFT size	Transmission mode
+      ====	========	========================
+      1		2K		``TRANSMISSION_MODE_2K``
+      2		4K		``TRANSMISSION_MODE_4K``
+      3		8K		``TRANSMISSION_MODE_8K``
+      ====	========	========================
+
+   #. If ``DTV_TRANSMISSION_MODE`` is set the ``TRANSMISSION_MODE_AUTO``
+      the hardware will try to find the correct FFT-size (if capable) and
+      will use TMCC to fill in the missing parameters.
+
+   #. DVB-T specifies 2K and 8K as valid sizes.
+
+   #. DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.
+
+   #. DTMB specifies C1 and C3780.
+
+
+.. _DTV-HIERARCHY:
+
+DTV_HIERARCHY
+=============
+
+Used only on DVB-T and DVB-T2.
+
+Frontend hierarchy.
+
+The acceptable values are defined by :c:type:`fe_hierarchy`.
+
+
+.. _DTV-STREAM-ID:
+
+DTV_STREAM_ID
+=============
+
+Used on DVB-S2, DVB-T2 and ISDB-S.
+
+DVB-S2, DVB-T2 and ISDB-S support the transmission of several streams on
+a single transport stream. This property enables the digital TV driver to
+handle substream filtering, when supported by the hardware. By default,
+substream filtering is disabled.
+
+For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255.
+
+For ISDB, the valid substream id range is from 1 to 65535.
+
+To disable it, you should use the special macro NO_STREAM_ID_FILTER.
+
+Note: any value outside the id range also disables filtering.
+
+
+.. _DTV-DVBT2-PLP-ID-LEGACY:
+
+DTV_DVBT2_PLP_ID_LEGACY
+=======================
+
+Obsolete, replaced with DTV_STREAM_ID.
+
+
+.. _DTV-ENUM-DELSYS:
+
+DTV_ENUM_DELSYS
+===============
+
+A Multi standard frontend needs to advertise the delivery systems
+provided. Applications need to enumerate the provided delivery systems,
+before using any other operation with the frontend. Prior to it's
+introduction, FE_GET_INFO was used to determine a frontend type. A
+frontend which provides more than a single delivery system,
+FE_GET_INFO doesn't help much. Applications which intends to use a
+multistandard frontend must enumerate the delivery systems associated
+with it, rather than trying to use FE_GET_INFO. In the case of a
+legacy frontend, the result is just the same as with FE_GET_INFO, but
+in a more structured format
+
+The acceptable values are defined by :c:type:`fe_delivery_system`.
+
+
+.. _DTV-INTERLEAVING:
+
+DTV_INTERLEAVING
+================
+
+Time interleaving to be used.
+
+The acceptable values are defined by :c:type:`fe_interleaving`.
+
+
+.. _DTV-LNA:
+
+DTV_LNA
+=======
+
+Low-noise amplifier.
+
+Hardware might offer controllable LNA which can be set manually using
+that parameter. Usually LNA could be found only from terrestrial devices
+if at all.
+
+Possible values: 0, 1, LNA_AUTO
+
+0, LNA off
+
+1, LNA on
+
+use the special macro LNA_AUTO to set LNA auto
+
+
+.. _DTV-SCRAMBLING-SEQUENCE-INDEX:
+
+DTV_SCRAMBLING_SEQUENCE_INDEX
+=============================
+
+Used on DVB-S2.
+
+This 18 bit field, when present, carries the index of the DVB-S2 physical
+layer scrambling sequence as defined in clause 5.5.4 of EN 302 307.
+There is no explicit signalling method to convey scrambling sequence index
+to the receiver. If S2 satellite delivery system descriptor is available
+it can be used to read the scrambling sequence index (EN 300 468 table 41).
+
+By default, gold scrambling sequence index 0 is used.
+
+The valid scrambling sequence index range is from 0 to 262142.
diff --git a/Documentation/userspace-api/media/dvb/frontend-header.rst b/Documentation/userspace-api/media/dvb/frontend-header.rst
new file mode 100644
index 000000000..77f403361
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend-header.rst
@@ -0,0 +1,6 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+Frontend uAPI data types
+========================
+
+.. kernel-doc:: include/uapi/linux/dvb/frontend.h
diff --git a/Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst b/Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst
new file mode 100644
index 000000000..92ef98964
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst
@@ -0,0 +1,75 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _frontend-property-cable-systems:
+
+*****************************************
+Properties used on cable delivery systems
+*****************************************
+
+
+.. _dvbc-params:
+
+DVB-C delivery system
+=====================
+
+The DVB-C Annex-A is the widely used cable standard. Transmission uses
+QAM modulation.
+
+The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It
+supports a subset of the Annex A modulation types, and a roll-off of
+0.13, instead of 0.15
+
+The following parameters are valid for DVB-C Annex A/C:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+-  :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+-  :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>`
+
+-  :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
+
+-  :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _dvbc-annex-b-params:
+
+DVB-C Annex B delivery system
+=============================
+
+The DVB-C Annex-B is only used on a few Countries like the United
+States.
+
+The following parameters are valid for DVB-C Annex B:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+-  :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+-  :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
diff --git a/Documentation/userspace-api/media/dvb/frontend-property-satellite-systems.rst b/Documentation/userspace-api/media/dvb/frontend-property-satellite-systems.rst
new file mode 100644
index 000000000..13b344b28
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend-property-satellite-systems.rst
@@ -0,0 +1,105 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _frontend-property-satellite-systems:
+
+*********************************************
+Properties used on satellite delivery systems
+*********************************************
+
+
+.. _dvbs-params:
+
+DVB-S delivery system
+=====================
+
+The following parameters are valid for DVB-S:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+-  :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>`
+
+-  :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
+
+-  :ref:`DTV_VOLTAGE <DTV-VOLTAGE>`
+
+-  :ref:`DTV_TONE <DTV-TONE>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+Future implementations might add those two missing parameters:
+
+-  :ref:`DTV_DISEQC_MASTER <DTV-DISEQC-MASTER>`
+
+-  :ref:`DTV_DISEQC_SLAVE_REPLY <DTV-DISEQC-SLAVE-REPLY>`
+
+
+.. _dvbs2-params:
+
+DVB-S2 delivery system
+======================
+
+In addition to all parameters valid for DVB-S, DVB-S2 supports the
+following parameters:
+
+-  :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+-  :ref:`DTV_PILOT <DTV-PILOT>`
+
+-  :ref:`DTV_ROLLOFF <DTV-ROLLOFF>`
+
+-  :ref:`DTV_STREAM_ID <DTV-STREAM-ID>`
+
+-  :ref:`DTV_SCRAMBLING_SEQUENCE_INDEX <DTV-SCRAMBLING-SEQUENCE-INDEX>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _turbo-params:
+
+Turbo code delivery system
+==========================
+
+In addition to all parameters valid for DVB-S, turbo code supports the
+following parameters:
+
+-  :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+
+.. _isdbs-params:
+
+ISDB-S delivery system
+======================
+
+The following parameters are valid for ISDB-S:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+-  :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>`
+
+-  :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
+
+-  :ref:`DTV_VOLTAGE <DTV-VOLTAGE>`
+
+-  :ref:`DTV_STREAM_ID <DTV-STREAM-ID>`
diff --git a/Documentation/userspace-api/media/dvb/frontend-property-terrestrial-systems.rst b/Documentation/userspace-api/media/dvb/frontend-property-terrestrial-systems.rst
new file mode 100644
index 000000000..8cd461cee
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend-property-terrestrial-systems.rst
@@ -0,0 +1,294 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _frontend-property-terrestrial-systems:
+
+***********************************************
+Properties used on terrestrial delivery systems
+***********************************************
+
+
+.. _dvbt-params:
+
+DVB-T delivery system
+=====================
+
+The following parameters are valid for DVB-T:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+-  :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+-  :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+-  :ref:`DTV_CODE_RATE_HP <DTV-CODE-RATE-HP>`
+
+-  :ref:`DTV_CODE_RATE_LP <DTV-CODE-RATE-LP>`
+
+-  :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>`
+
+-  :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>`
+
+-  :ref:`DTV_HIERARCHY <DTV-HIERARCHY>`
+
+-  :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _dvbt2-params:
+
+DVB-T2 delivery system
+======================
+
+DVB-T2 support is currently in the early stages of development, so
+expect that this section maygrow and become more detailed with time.
+
+The following parameters are valid for DVB-T2:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+-  :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+-  :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+-  :ref:`DTV_CODE_RATE_HP <DTV-CODE-RATE-HP>`
+
+-  :ref:`DTV_CODE_RATE_LP <DTV-CODE-RATE-LP>`
+
+-  :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>`
+
+-  :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>`
+
+-  :ref:`DTV_HIERARCHY <DTV-HIERARCHY>`
+
+-  :ref:`DTV_STREAM_ID <DTV-STREAM-ID>`
+
+-  :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _isdbt:
+
+ISDB-T delivery system
+======================
+
+This ISDB-T/ISDB-Tsb API extension should reflect all information needed
+to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible that some
+very sophisticated devices won't need certain parameters to tune.
+
+The information given here should help application writers to know how
+to handle ISDB-T and ISDB-Tsb hardware using the Linux Digital TV API.
+
+The details given here about ISDB-T and ISDB-Tsb are just enough to
+basically show the dependencies between the needed parameter values, but
+surely some information is left out. For more detailed information see
+the following documents:
+
+ARIB STD-B31 - "Transmission System for Digital Terrestrial Television
+Broadcasting" and
+
+ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial Television
+Broadcasting".
+
+In order to understand the ISDB specific parameters, one has to have
+some knowledge the channel structure in ISDB-T and ISDB-Tsb. I.e. it has
+to be known to the reader that an ISDB-T channel consists of 13
+segments, that it can have up to 3 layer sharing those segments, and
+things like that.
+
+The following parameters are valid for ISDB-T:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+-  :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+-  :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>`
+
+-  :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>`
+
+-  :ref:`DTV_ISDBT_LAYER_ENABLED <DTV-ISDBT-LAYER-ENABLED>`
+
+-  :ref:`DTV_ISDBT_PARTIAL_RECEPTION <DTV-ISDBT-PARTIAL-RECEPTION>`
+
+-  :ref:`DTV_ISDBT_SOUND_BROADCASTING <DTV-ISDBT-SOUND-BROADCASTING>`
+
+-  :ref:`DTV_ISDBT_SB_SUBCHANNEL_ID <DTV-ISDBT-SB-SUBCHANNEL-ID>`
+
+-  :ref:`DTV_ISDBT_SB_SEGMENT_IDX <DTV-ISDBT-SB-SEGMENT-IDX>`
+
+-  :ref:`DTV_ISDBT_SB_SEGMENT_COUNT <DTV-ISDBT-SB-SEGMENT-COUNT>`
+
+-  :ref:`DTV_ISDBT_LAYERA_FEC <DTV-ISDBT-LAYER-FEC>`
+
+-  :ref:`DTV_ISDBT_LAYERA_MODULATION <DTV-ISDBT-LAYER-MODULATION>`
+
+-  :ref:`DTV_ISDBT_LAYERA_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>`
+
+-  :ref:`DTV_ISDBT_LAYERA_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>`
+
+-  :ref:`DTV_ISDBT_LAYERB_FEC <DTV-ISDBT-LAYER-FEC>`
+
+-  :ref:`DTV_ISDBT_LAYERB_MODULATION <DTV-ISDBT-LAYER-MODULATION>`
+
+-  :ref:`DTV_ISDBT_LAYERB_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>`
+
+-  :ref:`DTV_ISDBT_LAYERB_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>`
+
+-  :ref:`DTV_ISDBT_LAYERC_FEC <DTV-ISDBT-LAYER-FEC>`
+
+-  :ref:`DTV_ISDBT_LAYERC_MODULATION <DTV-ISDBT-LAYER-MODULATION>`
+
+-  :ref:`DTV_ISDBT_LAYERC_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>`
+
+-  :ref:`DTV_ISDBT_LAYERC_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _atsc-params:
+
+ATSC delivery system
+====================
+
+The following parameters are valid for ATSC:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+-  :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _atscmh-params:
+
+ATSC-MH delivery system
+=======================
+
+The following parameters are valid for ATSC-MH:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+-  :ref:`DTV_ATSCMH_FIC_VER <DTV-ATSCMH-FIC-VER>`
+
+-  :ref:`DTV_ATSCMH_PARADE_ID <DTV-ATSCMH-PARADE-ID>`
+
+-  :ref:`DTV_ATSCMH_NOG <DTV-ATSCMH-NOG>`
+
+-  :ref:`DTV_ATSCMH_TNOG <DTV-ATSCMH-TNOG>`
+
+-  :ref:`DTV_ATSCMH_SGN <DTV-ATSCMH-SGN>`
+
+-  :ref:`DTV_ATSCMH_PRC <DTV-ATSCMH-PRC>`
+
+-  :ref:`DTV_ATSCMH_RS_FRAME_MODE <DTV-ATSCMH-RS-FRAME-MODE>`
+
+-  :ref:`DTV_ATSCMH_RS_FRAME_ENSEMBLE <DTV-ATSCMH-RS-FRAME-ENSEMBLE>`
+
+-  :ref:`DTV_ATSCMH_RS_CODE_MODE_PRI <DTV-ATSCMH-RS-CODE-MODE-PRI>`
+
+-  :ref:`DTV_ATSCMH_RS_CODE_MODE_SEC <DTV-ATSCMH-RS-CODE-MODE-SEC>`
+
+-  :ref:`DTV_ATSCMH_SCCC_BLOCK_MODE <DTV-ATSCMH-SCCC-BLOCK-MODE>`
+
+-  :ref:`DTV_ATSCMH_SCCC_CODE_MODE_A <DTV-ATSCMH-SCCC-CODE-MODE-A>`
+
+-  :ref:`DTV_ATSCMH_SCCC_CODE_MODE_B <DTV-ATSCMH-SCCC-CODE-MODE-B>`
+
+-  :ref:`DTV_ATSCMH_SCCC_CODE_MODE_C <DTV-ATSCMH-SCCC-CODE-MODE-C>`
+
+-  :ref:`DTV_ATSCMH_SCCC_CODE_MODE_D <DTV-ATSCMH-SCCC-CODE-MODE-D>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _dtmb-params:
+
+DTMB delivery system
+====================
+
+The following parameters are valid for DTMB:
+
+-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+-  :ref:`DTV_TUNE <DTV-TUNE>`
+
+-  :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+-  :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+-  :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+-  :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+-  :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
+
+-  :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>`
+
+-  :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>`
+
+-  :ref:`DTV_INTERLEAVING <DTV-INTERLEAVING>`
+
+-  :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
diff --git a/Documentation/userspace-api/media/dvb/frontend-stat-properties.rst b/Documentation/userspace-api/media/dvb/frontend-stat-properties.rst
new file mode 100644
index 000000000..223c1c56c
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend-stat-properties.rst
@@ -0,0 +1,245 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _frontend-stat-properties:
+
+******************************
+Frontend statistics indicators
+******************************
+
+The values are returned via ``dtv_property.stat``. If the property is
+supported, ``dtv_property.stat.len`` is bigger than zero.
+
+For most delivery systems, ``dtv_property.stat.len`` will be 1 if the
+stats is supported, and the properties will return a single value for
+each parameter.
+
+It should be noted, however, that new OFDM delivery systems like ISDB
+can use different modulation types for each group of carriers. On such
+standards, up to 3 groups of statistics can be provided, and
+``dtv_property.stat.len`` is updated to reflect the "global" metrics,
+plus one metric per each carrier group (called "layer" on ISDB).
+
+So, in order to be consistent with other delivery systems, the first
+value at :c:type:`dtv_property.stat.dtv_stats <dtv_stats>` array refers
+to the global metric. The other elements of the array represent each
+layer, starting from layer A(index 1), layer B (index 2) and so on.
+
+The number of filled elements are stored at ``dtv_property.stat.len``.
+
+Each element of the ``dtv_property.stat.dtv_stats`` array consists on
+two elements:
+
+-  ``svalue`` or ``uvalue``, where ``svalue`` is for signed values of
+   the measure (dB measures) and ``uvalue`` is for unsigned values
+   (counters, relative scale)
+
+-  ``scale`` - Scale for the value. It can be:
+
+   -  ``FE_SCALE_NOT_AVAILABLE`` - The parameter is supported by the
+      frontend, but it was not possible to collect it (could be a
+      transitory or permanent condition)
+
+   -  ``FE_SCALE_DECIBEL`` - parameter is a signed value, measured in
+      1/1000 dB
+
+   -  ``FE_SCALE_RELATIVE`` - parameter is a unsigned value, where 0
+      means 0% and 65535 means 100%.
+
+   -  ``FE_SCALE_COUNTER`` - parameter is a unsigned value that counts
+      the occurrence of an event, like bit error, block error, or lapsed
+      time.
+
+
+.. _DTV-STAT-SIGNAL-STRENGTH:
+
+DTV_STAT_SIGNAL_STRENGTH
+========================
+
+Indicates the signal strength level at the analog part of the tuner or
+of the demod.
+
+Possible scales for this metric are:
+
+-  ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the
+   measurement was not complete yet.
+
+-  ``FE_SCALE_DECIBEL`` - signal strength is in 0.001 dBm units, power
+   measured in miliwatts. This value is generally negative.
+
+-  ``FE_SCALE_RELATIVE`` - The frontend provides a 0% to 100%
+   measurement for power (actually, 0 to 65535).
+
+
+.. _DTV-STAT-CNR:
+
+DTV_STAT_CNR
+============
+
+Indicates the Signal to Noise ratio for the main carrier.
+
+Possible scales for this metric are:
+
+-  ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the
+   measurement was not complete yet.
+
+-  ``FE_SCALE_DECIBEL`` - Signal/Noise ratio is in 0.001 dB units.
+
+-  ``FE_SCALE_RELATIVE`` - The frontend provides a 0% to 100%
+   measurement for Signal/Noise (actually, 0 to 65535).
+
+
+.. _DTV-STAT-PRE-ERROR-BIT-COUNT:
+
+DTV_STAT_PRE_ERROR_BIT_COUNT
+============================
+
+Measures the number of bit errors before the forward error correction
+(FEC) on the inner coding block (before Viterbi, LDPC or other inner
+code).
+
+This measure is taken during the same interval as
+``DTV_STAT_PRE_TOTAL_BIT_COUNT``.
+
+In order to get the BER (Bit Error Rate) measurement, it should be
+divided by
+:ref:`DTV_STAT_PRE_TOTAL_BIT_COUNT <DTV-STAT-PRE-TOTAL-BIT-COUNT>`.
+
+This measurement is monotonically increased, as the frontend gets more
+bit count measurements. The frontend may reset it when a
+channel/transponder is tuned.
+
+Possible scales for this metric are:
+
+-  ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the
+   measurement was not complete yet.
+
+-  ``FE_SCALE_COUNTER`` - Number of error bits counted before the inner
+   coding.
+
+
+.. _DTV-STAT-PRE-TOTAL-BIT-COUNT:
+
+DTV_STAT_PRE_TOTAL_BIT_COUNT
+============================
+
+Measures the amount of bits received before the inner code block, during
+the same period as
+:ref:`DTV_STAT_PRE_ERROR_BIT_COUNT <DTV-STAT-PRE-ERROR-BIT-COUNT>`
+measurement was taken.
+
+It should be noted that this measurement can be smaller than the total
+amount of bits on the transport stream, as the frontend may need to
+manually restart the measurement, losing some data between each
+measurement interval.
+
+This measurement is monotonically increased, as the frontend gets more
+bit count measurements. The frontend may reset it when a
+channel/transponder is tuned.
+
+Possible scales for this metric are:
+
+-  ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the
+   measurement was not complete yet.
+
+-  ``FE_SCALE_COUNTER`` - Number of bits counted while measuring
+   :ref:`DTV_STAT_PRE_ERROR_BIT_COUNT <DTV-STAT-PRE-ERROR-BIT-COUNT>`.
+
+
+.. _DTV-STAT-POST-ERROR-BIT-COUNT:
+
+DTV_STAT_POST_ERROR_BIT_COUNT
+=============================
+
+Measures the number of bit errors after the forward error correction
+(FEC) done by inner code block (after Viterbi, LDPC or other inner
+code).
+
+This measure is taken during the same interval as
+``DTV_STAT_POST_TOTAL_BIT_COUNT``.
+
+In order to get the BER (Bit Error Rate) measurement, it should be
+divided by
+:ref:`DTV_STAT_POST_TOTAL_BIT_COUNT <DTV-STAT-POST-TOTAL-BIT-COUNT>`.
+
+This measurement is monotonically increased, as the frontend gets more
+bit count measurements. The frontend may reset it when a
+channel/transponder is tuned.
+
+Possible scales for this metric are:
+
+-  ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the
+   measurement was not complete yet.
+
+-  ``FE_SCALE_COUNTER`` - Number of error bits counted after the inner
+   coding.
+
+
+.. _DTV-STAT-POST-TOTAL-BIT-COUNT:
+
+DTV_STAT_POST_TOTAL_BIT_COUNT
+=============================
+
+Measures the amount of bits received after the inner coding, during the
+same period as
+:ref:`DTV_STAT_POST_ERROR_BIT_COUNT <DTV-STAT-POST-ERROR-BIT-COUNT>`
+measurement was taken.
+
+It should be noted that this measurement can be smaller than the total
+amount of bits on the transport stream, as the frontend may need to
+manually restart the measurement, losing some data between each
+measurement interval.
+
+This measurement is monotonically increased, as the frontend gets more
+bit count measurements. The frontend may reset it when a
+channel/transponder is tuned.
+
+Possible scales for this metric are:
+
+-  ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the
+   measurement was not complete yet.
+
+-  ``FE_SCALE_COUNTER`` - Number of bits counted while measuring
+   :ref:`DTV_STAT_POST_ERROR_BIT_COUNT <DTV-STAT-POST-ERROR-BIT-COUNT>`.
+
+
+.. _DTV-STAT-ERROR-BLOCK-COUNT:
+
+DTV_STAT_ERROR_BLOCK_COUNT
+==========================
+
+Measures the number of block errors after the outer forward error
+correction coding (after Reed-Solomon or other outer code).
+
+This measurement is monotonically increased, as the frontend gets more
+bit count measurements. The frontend may reset it when a
+channel/transponder is tuned.
+
+Possible scales for this metric are:
+
+-  ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the
+   measurement was not complete yet.
+
+-  ``FE_SCALE_COUNTER`` - Number of error blocks counted after the outer
+   coding.
+
+
+.. _DTV-STAT-TOTAL-BLOCK-COUNT:
+
+DTV-STAT_TOTAL_BLOCK_COUNT
+==========================
+
+Measures the total number of blocks received during the same period as
+:ref:`DTV_STAT_ERROR_BLOCK_COUNT <DTV-STAT-ERROR-BLOCK-COUNT>`
+measurement was taken.
+
+It can be used to calculate the PER indicator, by dividing
+:ref:`DTV_STAT_ERROR_BLOCK_COUNT <DTV-STAT-ERROR-BLOCK-COUNT>` by
+:ref:`DTV-STAT-TOTAL-BLOCK-COUNT`.
+
+Possible scales for this metric are:
+
+-  ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the
+   measurement was not complete yet.
+
+-  ``FE_SCALE_COUNTER`` - Number of blocks counted while measuring
+   :ref:`DTV_STAT_ERROR_BLOCK_COUNT <DTV-STAT-ERROR-BLOCK-COUNT>`.
diff --git a/Documentation/userspace-api/media/dvb/frontend.rst b/Documentation/userspace-api/media/dvb/frontend.rst
new file mode 100644
index 000000000..1df68730f
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dvb_frontend:
+
+#######################
+Digital TV Frontend API
+#######################
+
+The Digital TV frontend API was designed to support three groups of delivery
+systems: Terrestrial, cable and Satellite. Currently, the following
+delivery systems are supported:
+
+-  Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H,
+   DTMB, CMMB
+
+-  Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B)
+
+-  Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS
+
+The Digital TV frontend controls several sub-devices including:
+
+-  Tuner
+
+-  Digital TV demodulator
+
+-  Low noise amplifier (LNA)
+
+-  Satellite Equipment Control (SEC) [#f1]_.
+
+The frontend can be accessed through ``/dev/dvb/adapter?/frontend?``.
+Data types and ioctl definitions can be accessed by including
+``linux/dvb/frontend.h`` in your application.
+
+.. note::
+
+   Transmission via the internet (DVB-IP) and MMT (MPEG Media Transport)
+   is not yet handled by this API but a future extension is possible.
+
+.. [#f1]
+
+   On Satellite systems, the API support for the Satellite Equipment
+   Control (SEC) allows to power control and to send/receive signals to
+   control the antenna subsystem, selecting the polarization and choosing
+   the Intermediate Frequency IF) of the Low Noise Block Converter Feed
+   Horn (LNBf). It supports the DiSEqC and V-SEC protocols. The DiSEqC
+   (digital SEC) specification is available at
+   `Eutelsat <http://www.eutelsat.com/satellites/4_5_5.html>`__.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    query-dvb-frontend-info
+    dvb-fe-read-status
+    dvbproperty
+    frontend_fcalls
diff --git a/Documentation/userspace-api/media/dvb/frontend_f_close.rst b/Documentation/userspace-api/media/dvb/frontend_f_close.rst
new file mode 100644
index 000000000..52c323a85
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend_f_close.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _frontend_f_close:
+
+***************************
+Digital TV frontend close()
+***************************
+
+Name
+====
+
+fe-close - Close a frontend device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: int close( int fd )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+Description
+===========
+
+This system call closes a previously opened front-end device. After
+closing a front-end device, its corresponding hardware might be powered
+down automatically.
+
+Return Value
+============
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/frontend_f_open.rst b/Documentation/userspace-api/media/dvb/frontend_f_open.rst
new file mode 100644
index 000000000..bb37eded0
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend_f_open.rst
@@ -0,0 +1,104 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.fe
+
+.. _frontend_f_open:
+
+***************************
+Digital TV frontend open()
+***************************
+
+Name
+====
+
+fe-open - Open a frontend device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <fcntl.h>
+
+.. c:function:: int open( const char *device_name, int flags )
+
+Arguments
+=========
+
+``device_name``
+    Device to be opened.
+
+``flags``
+    Open flags. Access can either be ``O_RDWR`` or ``O_RDONLY``.
+
+    Multiple opens are allowed with ``O_RDONLY``. In this mode, only
+    query and read ioctls are allowed.
+
+    Only one open is allowed in ``O_RDWR``. In this mode, all ioctls are
+    allowed.
+
+    When the ``O_NONBLOCK`` flag is given, the system calls may return
+    ``EAGAIN`` error code when no data is available or when the device
+    driver is temporarily busy.
+
+    Other flags have no effect.
+
+Description
+===========
+
+This system call opens a named frontend device
+(``/dev/dvb/adapter?/frontend?``) for subsequent use. Usually the first
+thing to do after a successful open is to find out the frontend type
+with :ref:`FE_GET_INFO`.
+
+The device can be opened in read-only mode, which only allows monitoring
+of device status and statistics, or read/write mode, which allows any
+kind of use (e.g. performing tuning operations.)
+
+In a system with multiple front-ends, it is usually the case that
+multiple devices cannot be open in read/write mode simultaneously. As
+long as a front-end device is opened in read/write mode, other open()
+calls in read/write mode will either fail or block, depending on whether
+non-blocking or blocking mode was specified. A front-end device opened
+in blocking mode can later be put into non-blocking mode (and vice
+versa) using the F_SETFL command of the fcntl system call. This is a
+standard system call, documented in the Linux manual page for fcntl.
+When an open() call has succeeded, the device will be ready for use in
+the specified mode. This implies that the corresponding hardware is
+powered up, and that other front-ends may have been powered down to make
+that possible.
+
+Return Value
+============
+
+On success :c:func:`open()` returns the new file descriptor.
+On error, -1 is returned, and the ``errno`` variable is set appropriately.
+
+Possible error codes are:
+
+On success 0 is returned, and :c:type:`ca_slot_info` is filled.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+    -  - ``EPERM``
+       -  The caller has no permission to access the device.
+
+    -  - ``EBUSY``
+       -  The the device driver is already in use.
+
+    -  - ``EMFILE``
+       -  The process already has the maximum number of files open.
+
+    -  - ``ENFILE``
+       -  The limit on the total number of files open on the system has been
+	  reached.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/frontend_fcalls.rst b/Documentation/userspace-api/media/dvb/frontend_fcalls.rst
new file mode 100644
index 000000000..1df27b6e8
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend_fcalls.rst
@@ -0,0 +1,24 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _frontend_fcalls:
+
+#######################
+Frontend Function Calls
+#######################
+
+.. toctree::
+    :maxdepth: 1
+
+    frontend_f_open
+    frontend_f_close
+    fe-get-info
+    fe-read-status
+    fe-get-property
+    fe-diseqc-reset-overload
+    fe-diseqc-send-master-cmd
+    fe-diseqc-recv-slave-reply
+    fe-diseqc-send-burst
+    fe-set-tone
+    fe-set-voltage
+    fe-enable-high-lnb-voltage
+    fe-set-frontend-tune-mode
diff --git a/Documentation/userspace-api/media/dvb/frontend_legacy_api.rst b/Documentation/userspace-api/media/dvb/frontend_legacy_api.rst
new file mode 100644
index 000000000..535828c00
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend_legacy_api.rst
@@ -0,0 +1,38 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _frontend_legacy_types:
+
+Frontend Legacy Data Types
+==========================
+
+
+.. toctree::
+    :maxdepth: 1
+
+    fe-type-t
+    fe-bandwidth-t
+    dvb-frontend-parameters
+    dvb-frontend-event
+
+
+.. _frontend_legacy_fcalls:
+
+Frontend Legacy Function Calls
+==============================
+
+Those functions are defined at DVB version 3. The support is kept in the
+kernel due to compatibility issues only. Their usage is strongly not
+recommended
+
+
+.. toctree::
+    :maxdepth: 1
+
+    fe-read-ber
+    fe-read-snr
+    fe-read-signal-strength
+    fe-read-uncorrected-blocks
+    fe-set-frontend
+    fe-get-frontend
+    fe-get-event
+    fe-dishnetwork-send-legacy-cmd
diff --git a/Documentation/userspace-api/media/dvb/frontend_legacy_dvbv3_api.rst b/Documentation/userspace-api/media/dvb/frontend_legacy_dvbv3_api.rst
new file mode 100644
index 000000000..09de723c2
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/frontend_legacy_dvbv3_api.rst
@@ -0,0 +1,18 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _frontend_legacy_dvbv3_api:
+
+***********************************************
+Digital TV Frontend legacy API (a. k. a. DVBv3)
+***********************************************
+
+The usage of this API is deprecated, as it doesn't support all digital
+TV standards, doesn't provide good statistics measurements and provides
+incomplete information. This is kept only to support legacy
+applications.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    frontend_legacy_api
diff --git a/Documentation/userspace-api/media/dvb/headers.rst b/Documentation/userspace-api/media/dvb/headers.rst
new file mode 100644
index 000000000..9743ffc35
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/headers.rst
@@ -0,0 +1,23 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+****************************
+Digital TV uAPI header files
+****************************
+
+Digital TV uAPI headers
+***********************
+
+.. kernel-include:: $BUILDDIR/frontend.h.rst
+
+.. kernel-include:: $BUILDDIR/dmx.h.rst
+
+.. kernel-include:: $BUILDDIR/ca.h.rst
+
+.. kernel-include:: $BUILDDIR/net.h.rst
+
+Legacy uAPI
+***********
+
+.. kernel-include:: $BUILDDIR/audio.h.rst
+
+.. kernel-include:: $BUILDDIR/video.h.rst
diff --git a/Documentation/userspace-api/media/dvb/intro.rst b/Documentation/userspace-api/media/dvb/intro.rst
new file mode 100644
index 000000000..a935f3914
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/intro.rst
@@ -0,0 +1,183 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dvb_introdution:
+
+************
+Introduction
+************
+
+
+.. _requisites:
+
+What you need to know
+=====================
+
+The reader of this document is required to have some knowledge in the
+area of digital video broadcasting (Digital TV) and should be familiar with
+part I of the MPEG2 specification ISO/IEC 13818 (aka ITU-T H.222), i.e
+you should know what a program/transport stream (PS/TS) is and what is
+meant by a packetized elementary stream (PES) or an I-frame.
+
+Various Digital TV standards documents are available for download at:
+
+- European standards (DVB): http://www.dvb.org and/or http://www.etsi.org.
+- American standards (ATSC): https://www.atsc.org/standards/
+- Japanese standards (ISDB): http://www.dibeg.org/
+
+It is also necessary to know how to access Linux devices and how to
+use ioctl calls. This also includes the knowledge of C or C++.
+
+
+.. _history:
+
+History
+=======
+
+The first API for Digital TV cards we used at Convergence in late 1999 was an
+extension of the Video4Linux API which was primarily developed for frame
+grabber cards. As such it was not really well suited to be used for Digital
+TV cards and their new features like recording MPEG streams and filtering
+several section and PES data streams at the same time.
+
+In early 2000, Convergence was approached by Nokia with a proposal for a new
+standard Linux Digital TV API. As a commitment to the development of terminals
+based on open standards, Nokia and Convergence made it available to all
+Linux developers and published it on https://linuxtv.org in September
+2000. With the Linux driver for the Siemens/Hauppauge DVB PCI card,
+Convergence provided a first implementation of the Linux Digital TV API.
+Convergence was the maintainer of the Linux Digital TV API in the early
+days.
+
+Now, the API is maintained by the LinuxTV community (i.e. you, the reader
+of this document). The Linux  Digital TV API is constantly reviewed and
+improved together with the improvements at the subsystem's core at the
+Kernel.
+
+
+.. _overview:
+
+Overview
+========
+
+
+.. _stb_components:
+
+.. kernel-figure:: dvbstb.svg
+    :alt:   dvbstb.svg
+    :align: center
+
+    Components of a Digital TV card/STB
+
+A Digital TV card or set-top-box (STB) usually consists of the
+following main hardware components:
+
+Frontend consisting of tuner and digital TV demodulator
+   Here the raw signal reaches the digital TV hardware from a satellite dish or
+   antenna or directly from cable. The frontend down-converts and
+   demodulates this signal into an MPEG transport stream (TS). In case
+   of a satellite frontend, this includes a facility for satellite
+   equipment control (SEC), which allows control of LNB polarization,
+   multi feed switches or dish rotors.
+
+Conditional Access (CA) hardware like CI adapters and smartcard slots
+   The complete TS is passed through the CA hardware. Programs to which
+   the user has access (controlled by the smart card) are decoded in
+   real time and re-inserted into the TS.
+
+   .. note::
+
+      Not every digital TV hardware provides conditional access hardware.
+
+Demultiplexer which filters the incoming Digital TV MPEG-TS stream
+   The demultiplexer splits the TS into its components like audio and
+   video streams. Besides usually several of such audio and video
+   streams it also contains data streams with information about the
+   programs offered in this or other streams of the same provider.
+
+Audio and video decoder
+   The main targets of the demultiplexer are audio and video
+   decoders. After decoding, they pass on the uncompressed audio and
+   video to the computer screen or to a TV set.
+
+   .. note::
+
+      Modern hardware usually doesn't have a separate decoder hardware, as
+      such functionality can be provided by the main CPU, by the graphics
+      adapter of the system or by a signal processing hardware embedded on
+      a Systems on a Chip (SoC) integrated circuit.
+
+      It may also not be needed for certain usages (e.g. for data-only
+      uses like “internet over satellite”).
+
+:ref:`stb_components` shows a crude schematic of the control and data
+flow between those components.
+
+
+
+.. _dvb_devices:
+
+Linux Digital TV Devices
+========================
+
+The Linux Digital TV API lets you control these hardware components through
+currently six Unix-style character devices for video, audio, frontend,
+demux, CA and IP-over-DVB networking. The video and audio devices
+control the MPEG2 decoder hardware, the frontend device the tuner and
+the Digital TV demodulator. The demux device gives you control over the PES
+and section filters of the hardware. If the hardware does not support
+filtering these filters can be implemented in software. Finally, the CA
+device controls all the conditional access capabilities of the hardware.
+It can depend on the individual security requirements of the platform,
+if and how many of the CA functions are made available to the
+application through this device.
+
+All devices can be found in the ``/dev`` tree under ``/dev/dvb``. The
+individual devices are called:
+
+-  ``/dev/dvb/adapterN/audioM``,
+
+-  ``/dev/dvb/adapterN/videoM``,
+
+-  ``/dev/dvb/adapterN/frontendM``,
+
+-  ``/dev/dvb/adapterN/netM``,
+
+-  ``/dev/dvb/adapterN/demuxM``,
+
+-  ``/dev/dvb/adapterN/dvrM``,
+
+-  ``/dev/dvb/adapterN/caM``,
+
+where ``N`` enumerates the Digital TV cards in a system starting from 0, and
+``M`` enumerates the devices of each type within each adapter, starting
+from 0, too. We will omit the “``/dev/dvb/adapterN/``\ ” in the further
+discussion of these devices.
+
+More details about the data structures and function calls of all the
+devices are described in the following chapters.
+
+
+.. _include_files:
+
+API include files
+=================
+
+For each of the Digital TV devices a corresponding include file exists. The
+Digital TV API include files should be included in application sources with a
+partial path like:
+
+
+.. code-block:: c
+
+	#include <linux/dvb/ca.h>
+
+	#include <linux/dvb/dmx.h>
+
+	#include <linux/dvb/frontend.h>
+
+	#include <linux/dvb/net.h>
+
+
+To enable applications to support different API version, an additional
+include file ``linux/dvb/version.h`` exists, which defines the constant
+``DVB_API_VERSION``. This document describes ``DVB_API_VERSION 5.10``.
diff --git a/Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst b/Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst
new file mode 100644
index 000000000..6104879d7
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst
@@ -0,0 +1,32 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _legacy_dvb_apis:
+
+***************************
+Digital TV Deprecated APIs
+***************************
+
+The APIs described here **should not** be used on new drivers or applications.
+
+The DVBv3 frontend API has issues with new delivery systems, including
+DVB-S2, DVB-T2, ISDB, etc.
+
+There's just one driver for a very legacy hardware using the Digital TV
+audio and video APIs. No modern drivers should use it. Instead, audio and
+video should be using the V4L2 and ALSA APIs, and the pipelines should
+be set via the Media Controller API.
+
+.. attention::
+
+   The APIs described here doesn't necessarily reflect the current
+   code implementation, as this section of the document was written
+   for DVB version 1, while the code reflects DVB version 3
+   implementation.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    frontend_legacy_dvbv3_api
+    video
+    audio
diff --git a/Documentation/userspace-api/media/dvb/net-add-if.rst b/Documentation/userspace-api/media/dvb/net-add-if.rst
new file mode 100644
index 000000000..022b4c626
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net-add-if.rst
@@ -0,0 +1,52 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.net
+
+.. _NET_ADD_IF:
+
+****************
+ioctl NET_ADD_IF
+****************
+
+Name
+====
+
+NET_ADD_IF - Creates a new network interface for a given Packet ID.
+
+Synopsis
+========
+
+.. c:macro:: NET_ADD_IF
+
+``int ioctl(int fd, NET_ADD_IF, struct dvb_net_if *net_if)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``net_if``
+    pointer to struct :c:type:`dvb_net_if`
+
+Description
+===========
+
+The NET_ADD_IF ioctl system call selects the Packet ID (PID) that
+contains a TCP/IP traffic, the type of encapsulation to be used (MPE or
+ULE) and the interface number for the new interface to be created. When
+the system call successfully returns, a new virtual network interface is
+created.
+
+The struct :c:type:`dvb_net_if`::ifnum field will be
+filled with the number of the created interface.
+
+Return Value
+============
+
+On success 0 is returned, and :c:type:`ca_slot_info` is filled.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/net-get-if.rst b/Documentation/userspace-api/media/dvb/net-get-if.rst
new file mode 100644
index 000000000..e99696c9d
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net-get-if.rst
@@ -0,0 +1,50 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.net
+
+.. _NET_GET_IF:
+
+****************
+ioctl NET_GET_IF
+****************
+
+Name
+====
+
+NET_GET_IF - Read the configuration data of an interface created via - :ref:`NET_ADD_IF <net>`.
+
+Synopsis
+========
+
+.. c:macro:: NET_GET_IF
+
+``int ioctl(int fd, NET_GET_IF, struct dvb_net_if *net_if)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``net_if``
+    pointer to struct :c:type:`dvb_net_if`
+
+Description
+===========
+
+The NET_GET_IF ioctl uses the interface number given by the struct
+:c:type:`dvb_net_if`::ifnum field and fills the content of
+struct :c:type:`dvb_net_if` with the packet ID and
+encapsulation type used on such interface. If the interface was not
+created yet with :ref:`NET_ADD_IF <net>`, it will return -1 and fill
+the ``errno`` with ``EINVAL`` error code.
+
+Return Value
+============
+
+On success 0 is returned, and :c:type:`ca_slot_info` is filled.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/net-remove-if.rst b/Documentation/userspace-api/media/dvb/net-remove-if.rst
new file mode 100644
index 000000000..ac88691c0
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net-remove-if.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.net
+
+.. _NET_REMOVE_IF:
+
+*******************
+ioctl NET_REMOVE_IF
+*******************
+
+Name
+====
+
+NET_REMOVE_IF - Removes a network interface.
+
+Synopsis
+========
+
+.. c:macro:: NET_REMOVE_IF
+
+``int ioctl(int fd, NET_REMOVE_IF, int ifnum)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``net_if``
+    number of the interface to be removed
+
+Description
+===========
+
+The NET_REMOVE_IF ioctl deletes an interface previously created via
+:ref:`NET_ADD_IF <net>`.
+
+Return Value
+============
+
+On success 0 is returned, and :c:type:`ca_slot_info` is filled.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/net-types.rst b/Documentation/userspace-api/media/dvb/net-types.rst
new file mode 100644
index 000000000..075264bc0
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net-types.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _net_types:
+
+**************
+Net Data Types
+**************
+
+.. kernel-doc:: include/uapi/linux/dvb/net.h
diff --git a/Documentation/userspace-api/media/dvb/net.rst b/Documentation/userspace-api/media/dvb/net.rst
new file mode 100644
index 000000000..33368f515
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net.rst
@@ -0,0 +1,41 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _net:
+
+######################
+Digital TV Network API
+######################
+
+The Digital TV net device controls the mapping of data packages that are part
+of a transport stream to be mapped into a virtual network interface,
+visible through the standard Linux network protocol stack.
+
+Currently, two encapsulations are supported:
+
+-  `Multi Protocol Encapsulation (MPE) <http://en.wikipedia.org/wiki/Multiprotocol_Encapsulation>`__
+
+-  `Ultra Lightweight Encapsulation (ULE) <http://en.wikipedia.org/wiki/Unidirectional_Lightweight_Encapsulation>`__
+
+In order to create the Linux virtual network interfaces, an application
+needs to tell to the Kernel what are the PIDs and the encapsulation
+types that are present on the transport stream. This is done through
+``/dev/dvb/adapter?/net?`` device node. The data will be available via
+virtual ``dvb?_?`` network interfaces, and will be controlled/routed via
+the standard ip tools (like ip, route, netstat, ifconfig, etc).
+
+Data types and and ioctl definitions are defined via ``linux/dvb/net.h``
+header.
+
+
+.. _net_fcalls:
+
+Digital TV net Function Calls
+#############################
+
+.. toctree::
+    :maxdepth: 1
+
+    net-types
+    net-add-if
+    net-remove-if
+    net-get-if
diff --git a/Documentation/userspace-api/media/dvb/query-dvb-frontend-info.rst b/Documentation/userspace-api/media/dvb/query-dvb-frontend-info.rst
new file mode 100644
index 000000000..f099b4935
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/query-dvb-frontend-info.rst
@@ -0,0 +1,13 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _query-dvb-frontend-info:
+
+*****************************
+Querying frontend information
+*****************************
+
+Usually, the first thing to do when the frontend is opened is to check
+the frontend capabilities. This is done using
+:ref:`FE_GET_INFO`. This ioctl will enumerate the
+Digital TV API version and other characteristics about the frontend, and can
+be opened either in read only or read/write mode.
diff --git a/Documentation/userspace-api/media/dvb/video-clear-buffer.rst b/Documentation/userspace-api/media/dvb/video-clear-buffer.rst
new file mode 100644
index 000000000..a7730559b
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-clear-buffer.rst
@@ -0,0 +1,54 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_CLEAR_BUFFER:
+
+==================
+VIDEO_CLEAR_BUFFER
+==================
+
+Name
+----
+
+VIDEO_CLEAR_BUFFER
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_CLEAR_BUFFER
+
+``int ioctl(fd, VIDEO_CLEAR_BUFFER)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_CLEAR_BUFFER for this command.
+
+Description
+-----------
+
+This ioctl call clears all video buffers in the driver and in the
+decoder hardware.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-command.rst b/Documentation/userspace-api/media/dvb/video-command.rst
new file mode 100644
index 000000000..cae9445eb
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-command.rst
@@ -0,0 +1,96 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_COMMAND:
+
+=============
+VIDEO_COMMAND
+=============
+
+Name
+----
+
+VIDEO_COMMAND
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_COMMAND
+
+``int ioctl(int fd, VIDEO_COMMAND, struct video_command *cmd)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_COMMAND for this command.
+
+    -  .. row 3
+
+       -  struct video_command \*cmd
+
+       -  Commands the decoder.
+
+Description
+-----------
+
+This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
+this ioctl has been replaced by the
+:ref:`VIDIOC_DECODER_CMD` ioctl.
+
+This ioctl commands the decoder. The ``video_command`` struct is a
+subset of the ``v4l2_decoder_cmd`` struct, so refer to the
+:ref:`VIDIOC_DECODER_CMD` documentation for
+more information.
+
+.. c:type:: video_command
+
+.. code-block:: c
+
+	/* The structure must be zeroed before use by the application
+	This ensures it can be extended safely in the future. */
+	struct video_command {
+		__u32 cmd;
+		__u32 flags;
+		union {
+			struct {
+				__u64 pts;
+			} stop;
+
+			struct {
+				/* 0 or 1000 specifies normal speed,
+				1 specifies forward single stepping,
+				-1 specifies backward single stepping,
+				>1: playback at speed/1000 of the normal speed,
+				<-1: reverse playback at (-speed/1000) of the normal speed. */
+				__s32 speed;
+				__u32 format;
+			} play;
+
+			struct {
+				__u32 data[16];
+			} raw;
+		};
+	};
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-continue.rst b/Documentation/userspace-api/media/dvb/video-continue.rst
new file mode 100644
index 000000000..bc34bf398
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-continue.rst
@@ -0,0 +1,57 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_CONTINUE:
+
+==============
+VIDEO_CONTINUE
+==============
+
+Name
+----
+
+VIDEO_CONTINUE
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_CONTINUE
+
+``int ioctl(fd, VIDEO_CONTINUE)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_CONTINUE for this command.
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. To control a V4L2 decoder use the
+V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
+
+This ioctl call restarts decoding and playing processes of the video
+stream which was played before a call to VIDEO_FREEZE was made.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-fast-forward.rst b/Documentation/userspace-api/media/dvb/video-fast-forward.rst
new file mode 100644
index 000000000..e71fa8d69
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-fast-forward.rst
@@ -0,0 +1,72 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_FAST_FORWARD:
+
+==================
+VIDEO_FAST_FORWARD
+==================
+
+Name
+----
+
+VIDEO_FAST_FORWARD
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_FAST_FORWARD
+
+``int ioctl(fd, VIDEO_FAST_FORWARD, int nFrames)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_FAST_FORWARD for this command.
+
+    -  .. row 3
+
+       -  int nFrames
+
+       -  The number of frames to skip.
+
+Description
+-----------
+
+This ioctl call asks the Video Device to skip decoding of N number of
+I-frames. This call can only be used if VIDEO_SOURCE_MEMORY is
+selected.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EPERM``
+
+       -  Mode VIDEO_SOURCE_MEMORY not selected.
diff --git a/Documentation/userspace-api/media/dvb/video-fclose.rst b/Documentation/userspace-api/media/dvb/video-fclose.rst
new file mode 100644
index 000000000..01d24d548
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-fclose.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _video_fclose:
+
+=================
+dvb video close()
+=================
+
+Name
+----
+
+dvb video close()
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:function:: int close(int fd)
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+Description
+-----------
+
+This system call closes a previously opened video device.
+
+Return Value
+------------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EBADF``
+
+       -  fd is not a valid open file descriptor.
diff --git a/Documentation/userspace-api/media/dvb/video-fopen.rst b/Documentation/userspace-api/media/dvb/video-fopen.rst
new file mode 100644
index 000000000..1371b083e
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-fopen.rst
@@ -0,0 +1,111 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _video_fopen:
+
+================
+dvb video open()
+================
+
+Name
+----
+
+dvb video open()
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:function:: int open(const char *deviceName, int flags)
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  const char \*deviceName
+
+       -  Name of specific video device.
+
+    -  .. row 2
+
+       -  int flags
+
+       -  A bit-wise OR of the following flags:
+
+    -  .. row 3
+
+       -
+       -  O_RDONLY read-only access
+
+    -  .. row 4
+
+       -
+       -  O_RDWR read/write access
+
+    -  .. row 5
+
+       -
+       -  O_NONBLOCK open in non-blocking mode
+
+    -  .. row 6
+
+       -
+       -  (blocking mode is the default)
+
+Description
+-----------
+
+This system call opens a named video device (e.g.
+/dev/dvb/adapter0/video0) for subsequent use.
+
+When an open() call has succeeded, the device will be ready for use. The
+significance of blocking or non-blocking mode is described in the
+documentation for functions where there is a difference. It does not
+affect the semantics of the open() call itself. A device opened in
+blocking mode can later be put into non-blocking mode (and vice versa)
+using the F_SETFL command of the fcntl system call. This is a standard
+system call, documented in the Linux manual page for fcntl. Only one
+user can open the Video Device in O_RDWR mode. All other attempts to
+open the device in this mode will fail, and an error-code will be
+returned. If the Video Device is opened in O_RDONLY mode, the only
+ioctl call that can be used is VIDEO_GET_STATUS. All other call will
+return an error code.
+
+Return Value
+------------
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``ENODEV``
+
+       -  Device driver not loaded/available.
+
+    -  .. row 2
+
+       -  ``EINTERNAL``
+
+       -  Internal error.
+
+    -  .. row 3
+
+       -  ``EBUSY``
+
+       -  Device or resource busy.
+
+    -  .. row 4
+
+       -  ``EINVAL``
+
+       -  Invalid argument.
diff --git a/Documentation/userspace-api/media/dvb/video-freeze.rst b/Documentation/userspace-api/media/dvb/video-freeze.rst
new file mode 100644
index 000000000..4321f257c
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-freeze.rst
@@ -0,0 +1,61 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_FREEZE:
+
+============
+VIDEO_FREEZE
+============
+
+Name
+----
+
+VIDEO_FREEZE
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_FREEZE
+
+``int ioctl(fd, VIDEO_FREEZE)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_FREEZE for this command.
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. To control a V4L2 decoder use the
+V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
+
+This ioctl call suspends the live video stream being played. Decoding
+and playing are frozen. It is then possible to restart the decoding and
+playing process of the video stream using the VIDEO_CONTINUE command.
+If VIDEO_SOURCE_MEMORY is selected in the ioctl call
+VIDEO_SELECT_SOURCE, the Digital TV subsystem will not decode any more data
+until the ioctl call VIDEO_CONTINUE or VIDEO_PLAY is performed.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-fwrite.rst b/Documentation/userspace-api/media/dvb/video-fwrite.rst
new file mode 100644
index 000000000..a07fd7d7a
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-fwrite.rst
@@ -0,0 +1,79 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _video_fwrite:
+
+=================
+dvb video write()
+=================
+
+Name
+----
+
+dvb video write()
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:function:: size_t write(int fd, const void *buf, size_t count)
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  void \*buf
+
+       -  Pointer to the buffer containing the PES data.
+
+    -  .. row 3
+
+       -  size_t count
+
+       -  Size of buf.
+
+Description
+-----------
+
+This system call can only be used if VIDEO_SOURCE_MEMORY is selected
+in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
+PES format, unless the capability allows other formats. If O_NONBLOCK
+is not specified the function will block until buffer space is
+available. The amount of data to be transferred is implied by count.
+
+Return Value
+------------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EPERM``
+
+       -  Mode VIDEO_SOURCE_MEMORY not selected.
+
+    -  .. row 2
+
+       -  ``ENOMEM``
+
+       -  Attempted to write more data than the internal buffer can hold.
+
+    -  .. row 3
+
+       -  ``EBADF``
+
+       -  fd is not a valid open file descriptor.
diff --git a/Documentation/userspace-api/media/dvb/video-get-capabilities.rst b/Documentation/userspace-api/media/dvb/video-get-capabilities.rst
new file mode 100644
index 000000000..01e09f566
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-get-capabilities.rst
@@ -0,0 +1,61 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_GET_CAPABILITIES:
+
+======================
+VIDEO_GET_CAPABILITIES
+======================
+
+Name
+----
+
+VIDEO_GET_CAPABILITIES
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_GET_CAPABILITIES
+
+``int ioctl(fd, VIDEO_GET_CAPABILITIES, unsigned int *cap)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_GET_CAPABILITIES for this command.
+
+    -  .. row 3
+
+       -  unsigned int \*cap
+
+       -  Pointer to a location where to store the capability information.
+
+Description
+-----------
+
+This ioctl call asks the video device about its decoding capabilities.
+On success it returns and integer which has bits set according to the
+defines in section ??.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-get-event.rst b/Documentation/userspace-api/media/dvb/video-get-event.rst
new file mode 100644
index 000000000..90382bc36
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-get-event.rst
@@ -0,0 +1,105 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_GET_EVENT:
+
+===============
+VIDEO_GET_EVENT
+===============
+
+Name
+----
+
+VIDEO_GET_EVENT
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_GET_EVENT
+
+``int ioctl(fd, VIDEO_GET_EVENT, struct video_event *ev)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_GET_EVENT for this command.
+
+    -  .. row 3
+
+       -  struct video_event \*ev
+
+       -  Points to the location where the event, if any, is to be stored.
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. To get events from a V4L2 decoder
+use the V4L2 :ref:`VIDIOC_DQEVENT` ioctl instead.
+
+This ioctl call returns an event of type video_event if available. If
+an event is not available, the behavior depends on whether the device is
+in blocking or non-blocking mode. In the latter case, the call fails
+immediately with errno set to ``EWOULDBLOCK``. In the former case, the call
+blocks until an event becomes available. The standard Linux poll()
+and/or select() system calls can be used with the device file descriptor
+to watch for new events. For select(), the file descriptor should be
+included in the exceptfds argument, and for poll(), POLLPRI should be
+specified as the wake-up condition. Read-only permissions are sufficient
+for this ioctl call.
+
+.. c:type:: video_event
+
+.. code-block:: c
+
+	struct video_event {
+		__s32 type;
+	#define VIDEO_EVENT_SIZE_CHANGED	1
+	#define VIDEO_EVENT_FRAME_RATE_CHANGED	2
+	#define VIDEO_EVENT_DECODER_STOPPED 	3
+	#define VIDEO_EVENT_VSYNC 		4
+		long timestamp;
+		union {
+			video_size_t size;
+			unsigned int frame_rate;	/* in frames per 1000sec */
+			unsigned char vsync_field;	/* unknown/odd/even/progressive */
+		} u;
+	};
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EWOULDBLOCK``
+
+       -  There is no event pending, and the device is in non-blocking mode.
+
+    -  .. row 2
+
+       -  ``EOVERFLOW``
+
+       -  Overflow in event queue - one or more events were lost.
diff --git a/Documentation/userspace-api/media/dvb/video-get-frame-count.rst b/Documentation/userspace-api/media/dvb/video-get-frame-count.rst
new file mode 100644
index 000000000..b48ac8c58
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-get-frame-count.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_GET_FRAME_COUNT:
+
+=====================
+VIDEO_GET_FRAME_COUNT
+=====================
+
+Name
+----
+
+VIDEO_GET_FRAME_COUNT
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_GET_FRAME_COUNT
+
+``int ioctl(int fd, VIDEO_GET_FRAME_COUNT, __u64 *pts)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_GET_FRAME_COUNT for this command.
+
+    -  .. row 3
+
+       -  __u64 \*pts
+
+       -  Returns the number of frames displayed since the decoder was
+	  started.
+
+Description
+-----------
+
+This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
+this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_FRAME``
+control.
+
+This ioctl call asks the Video Device to return the number of displayed
+frames since the decoder was started.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-get-pts.rst b/Documentation/userspace-api/media/dvb/video-get-pts.rst
new file mode 100644
index 000000000..fedaff41b
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-get-pts.rst
@@ -0,0 +1,69 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_GET_PTS:
+
+=============
+VIDEO_GET_PTS
+=============
+
+Name
+----
+
+VIDEO_GET_PTS
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_GET_PTS
+
+``int ioctl(int fd, VIDEO_GET_PTS, __u64 *pts)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_GET_PTS for this command.
+
+    -  .. row 3
+
+       -  __u64 \*pts
+
+       -  Returns the 33-bit timestamp as defined in ITU T-REC-H.222.0 /
+	  ISO/IEC 13818-1.
+
+	  The PTS should belong to the currently played frame if possible,
+	  but may also be a value close to it like the PTS of the last
+	  decoded frame or the last PTS extracted by the PES parser.
+
+Description
+-----------
+
+This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
+this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_PTS``
+control.
+
+This ioctl call asks the Video Device to return the current PTS
+timestamp.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-get-size.rst b/Documentation/userspace-api/media/dvb/video-get-size.rst
new file mode 100644
index 000000000..de34331c5
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-get-size.rst
@@ -0,0 +1,69 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_GET_SIZE:
+
+==============
+VIDEO_GET_SIZE
+==============
+
+Name
+----
+
+VIDEO_GET_SIZE
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_GET_SIZE
+
+``int ioctl(int fd, VIDEO_GET_SIZE, video_size_t *size)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_GET_SIZE for this command.
+
+    -  .. row 3
+
+       -  video_size_t \*size
+
+       -  Returns the size and aspect ratio.
+
+Description
+-----------
+
+This ioctl returns the size and aspect ratio.
+
+.. c:type:: video_size_t
+
+.. code-block::c
+
+	typedef struct {
+		int w;
+		int h;
+		video_format_t aspect_ratio;
+	} video_size_t;
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-get-status.rst b/Documentation/userspace-api/media/dvb/video-get-status.rst
new file mode 100644
index 000000000..9b86fbf41
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-get-status.rst
@@ -0,0 +1,72 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_GET_STATUS:
+
+================
+VIDEO_GET_STATUS
+================
+
+Name
+----
+
+VIDEO_GET_STATUS
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_GET_STATUS
+
+``int ioctl(fd, VIDEO_GET_STATUS, struct video_status *status)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_GET_STATUS for this command.
+
+    -  .. row 3
+
+       -  struct video_status \*status
+
+       -  Returns the current status of the Video Device.
+
+Description
+-----------
+
+This ioctl call asks the Video Device to return the current status of
+the device.
+
+.. c:type:: video_status
+
+.. code-block:: c
+
+	struct video_status {
+		int                   video_blank;   /* blank video on freeze? */
+		video_play_state_t    play_state;    /* current state of playback */
+		video_stream_source_t stream_source; /* current source (demux/memory) */
+		video_format_t        video_format;  /* current aspect ratio of stream*/
+		video_displayformat_t display_format;/* selected cropping mode */
+	};
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-play.rst b/Documentation/userspace-api/media/dvb/video-play.rst
new file mode 100644
index 000000000..35ac8b98f
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-play.rst
@@ -0,0 +1,57 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_PLAY:
+
+==========
+VIDEO_PLAY
+==========
+
+Name
+----
+
+VIDEO_PLAY
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_PLAY
+
+``int ioctl(fd, VIDEO_PLAY)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_PLAY for this command.
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. To control a V4L2 decoder use the
+V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
+
+This ioctl call asks the Video Device to start playing a video stream
+from the selected source.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-select-source.rst b/Documentation/userspace-api/media/dvb/video-select-source.rst
new file mode 100644
index 000000000..929a20985
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-select-source.rst
@@ -0,0 +1,76 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_SELECT_SOURCE:
+
+===================
+VIDEO_SELECT_SOURCE
+===================
+
+Name
+----
+
+VIDEO_SELECT_SOURCE
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_SELECT_SOURCE
+
+``int ioctl(fd, VIDEO_SELECT_SOURCE, video_stream_source_t source)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_SELECT_SOURCE for this command.
+
+    -  .. row 3
+
+       -  video_stream_source_t source
+
+       -  Indicates which source shall be used for the Video stream.
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. This ioctl was also supported by the
+V4L2 ivtv driver, but that has been replaced by the ivtv-specific
+``IVTV_IOC_PASSTHROUGH_MODE`` ioctl.
+
+This ioctl call informs the video device which source shall be used for
+the input data. The possible sources are demux or memory. If memory is
+selected, the data is fed to the video device through the write command.
+
+.. c:type:: video_stream_source_t
+
+.. code-block:: c
+
+	typedef enum {
+		VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */
+		VIDEO_SOURCE_MEMORY /* If this source is selected, the stream
+				comes from the user through the write
+				system call */
+	} video_stream_source_t;
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-set-blank.rst b/Documentation/userspace-api/media/dvb/video-set-blank.rst
new file mode 100644
index 000000000..70249a6ba
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-set-blank.rst
@@ -0,0 +1,64 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_SET_BLANK:
+
+===============
+VIDEO_SET_BLANK
+===============
+
+Name
+----
+
+VIDEO_SET_BLANK
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_SET_BLANK
+
+``int ioctl(fd, VIDEO_SET_BLANK, boolean mode)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_SET_BLANK for this command.
+
+    -  .. row 3
+
+       -  boolean mode
+
+       -  TRUE: Blank screen when stop.
+
+    -  .. row 4
+
+       -
+       -  FALSE: Show last decoded frame.
+
+Description
+-----------
+
+This ioctl call asks the Video Device to blank out the picture.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-set-display-format.rst b/Documentation/userspace-api/media/dvb/video-set-display-format.rst
new file mode 100644
index 000000000..1de4f40ae
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-set-display-format.rst
@@ -0,0 +1,60 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_SET_DISPLAY_FORMAT:
+
+========================
+VIDEO_SET_DISPLAY_FORMAT
+========================
+
+Name
+----
+
+VIDEO_SET_DISPLAY_FORMAT
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_SET_DISPLAY_FORMAT
+
+``int ioctl(fd, VIDEO_SET_DISPLAY_FORMAT)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_SET_DISPLAY_FORMAT for this command.
+
+    -  .. row 3
+
+       -  video_display_format_t format
+
+       -  Selects the video format to be used.
+
+Description
+-----------
+
+This ioctl call asks the Video Device to select the video format to be
+applied by the MPEG chip on the video.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-set-format.rst b/Documentation/userspace-api/media/dvb/video-set-format.rst
new file mode 100644
index 000000000..bb64e37ae
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-set-format.rst
@@ -0,0 +1,82 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_SET_FORMAT:
+
+================
+VIDEO_SET_FORMAT
+================
+
+Name
+----
+
+VIDEO_SET_FORMAT
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_SET_FORMAT
+
+``int ioctl(fd, VIDEO_SET_FORMAT, video_format_t format)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_SET_FORMAT for this command.
+
+    -  .. row 3
+
+       -  video_format_t format
+
+       -  video format of TV as defined in section ??.
+
+Description
+-----------
+
+This ioctl sets the screen format (aspect ratio) of the connected output
+device (TV) so that the output of the decoder can be adjusted
+accordingly.
+
+.. c:type:: video_format_t
+
+.. code-block:: c
+
+	typedef enum {
+		VIDEO_FORMAT_4_3,     /* Select 4:3 format */
+		VIDEO_FORMAT_16_9,    /* Select 16:9 format. */
+		VIDEO_FORMAT_221_1    /* 2.21:1 */
+	} video_format_t;
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EINVAL``
+
+       -  format is not a valid video format.
diff --git a/Documentation/userspace-api/media/dvb/video-set-streamtype.rst b/Documentation/userspace-api/media/dvb/video-set-streamtype.rst
new file mode 100644
index 000000000..1f31c048b
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-set-streamtype.rst
@@ -0,0 +1,61 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_SET_STREAMTYPE:
+
+====================
+VIDEO_SET_STREAMTYPE
+====================
+
+Name
+----
+
+VIDEO_SET_STREAMTYPE
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_SET_STREAMTYPE
+
+``int ioctl(fd, VIDEO_SET_STREAMTYPE, int type)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_SET_STREAMTYPE for this command.
+
+    -  .. row 3
+
+       -  int type
+
+       -  stream type
+
+Description
+-----------
+
+This ioctl tells the driver which kind of stream to expect being written
+to it. If this call is not used the default of video PES is used. Some
+drivers might not support this call and always expect PES.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-slowmotion.rst b/Documentation/userspace-api/media/dvb/video-slowmotion.rst
new file mode 100644
index 000000000..1478fcc30
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-slowmotion.rst
@@ -0,0 +1,72 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_SLOWMOTION:
+
+================
+VIDEO_SLOWMOTION
+================
+
+Name
+----
+
+VIDEO_SLOWMOTION
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_SLOWMOTION
+
+``int ioctl(fd, VIDEO_SLOWMOTION, int nFrames)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_SLOWMOTION for this command.
+
+    -  .. row 3
+
+       -  int nFrames
+
+       -  The number of times to repeat each frame.
+
+Description
+-----------
+
+This ioctl call asks the video device to repeat decoding frames N number
+of times. This call can only be used if VIDEO_SOURCE_MEMORY is
+selected.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``EPERM``
+
+       -  Mode VIDEO_SOURCE_MEMORY not selected.
diff --git a/Documentation/userspace-api/media/dvb/video-stillpicture.rst b/Documentation/userspace-api/media/dvb/video-stillpicture.rst
new file mode 100644
index 000000000..d25384222
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-stillpicture.rst
@@ -0,0 +1,61 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_STILLPICTURE:
+
+==================
+VIDEO_STILLPICTURE
+==================
+
+Name
+----
+
+VIDEO_STILLPICTURE
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_STILLPICTURE
+
+``int ioctl(fd, VIDEO_STILLPICTURE, struct video_still_picture *sp)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_STILLPICTURE for this command.
+
+    -  .. row 3
+
+       -  struct video_still_picture \*sp
+
+       -  Pointer to a location where an I-frame and size is stored.
+
+Description
+-----------
+
+This ioctl call asks the Video Device to display a still picture
+(I-frame). The input data shall contain an I-frame. If the pointer is
+NULL, then the current displayed still picture is blanked.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-stop.rst b/Documentation/userspace-api/media/dvb/video-stop.rst
new file mode 100644
index 000000000..96f61c5b4
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-stop.rst
@@ -0,0 +1,74 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_STOP:
+
+==========
+VIDEO_STOP
+==========
+
+Name
+----
+
+VIDEO_STOP
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_STOP
+
+``int ioctl(fd, VIDEO_STOP, boolean mode)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_STOP for this command.
+
+    -  .. row 3
+
+       -  Boolean mode
+
+       -  Indicates how the screen shall be handled.
+
+    -  .. row 4
+
+       -
+       -  TRUE: Blank screen when stop.
+
+    -  .. row 5
+
+       -
+       -  FALSE: Show last decoded frame.
+
+Description
+-----------
+
+This ioctl is for Digital TV devices only. To control a V4L2 decoder use the
+V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
+
+This ioctl call asks the Video Device to stop playing the current
+stream. Depending on the input parameter, the screen can be blanked out
+or displaying the last decoded frame.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video-try-command.rst b/Documentation/userspace-api/media/dvb/video-try-command.rst
new file mode 100644
index 000000000..79bf3dfb8
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video-try-command.rst
@@ -0,0 +1,66 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.video
+
+.. _VIDEO_TRY_COMMAND:
+
+=================
+VIDEO_TRY_COMMAND
+=================
+
+Name
+----
+
+VIDEO_TRY_COMMAND
+
+.. attention:: This ioctl is deprecated.
+
+Synopsis
+--------
+
+.. c:macro:: VIDEO_TRY_COMMAND
+
+``int ioctl(int fd, VIDEO_TRY_COMMAND, struct video_command *cmd)``
+
+Arguments
+---------
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  int fd
+
+       -  File descriptor returned by a previous call to open().
+
+    -  .. row 2
+
+       -  int request
+
+       -  Equals VIDEO_TRY_COMMAND for this command.
+
+    -  .. row 3
+
+       -  struct video_command \*cmd
+
+       -  Try a decoder command.
+
+Description
+-----------
+
+This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
+this ioctl has been replaced by the
+:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` ioctl.
+
+This ioctl tries a decoder command. The ``video_command`` struct is a
+subset of the ``v4l2_decoder_cmd`` struct, so refer to the
+:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` documentation
+for more information.
+
+Return Value
+------------
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/video.rst b/Documentation/userspace-api/media/dvb/video.rst
new file mode 100644
index 000000000..3ed1bbfb9
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video.rst
@@ -0,0 +1,36 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dvb_video:
+
+#######################
+Digital TV Video Device
+#######################
+
+The Digital TV video device controls the MPEG2 video decoder of the Digital
+TV hardware. It can be accessed through **/dev/dvb/adapter0/video0**. Data
+types and and ioctl definitions can be accessed by including
+**linux/dvb/video.h** in your application.
+
+Note that the Digital TV video device only controls decoding of the MPEG video
+stream, not its presentation on the TV or computer screen. On PCs this
+is typically handled by an associated video4linux device, e.g.
+**/dev/video**, which allows scaling and defining output windows.
+
+Some Digital TV cards don’t have their own MPEG decoder, which results in the
+omission of the audio and video device as well as the video4linux
+device.
+
+The ioctls that deal with SPUs (sub picture units) and navigation
+packets are only supported on some MPEG decoders made for DVD playback.
+
+These ioctls were also used by V4L2 to control MPEG decoders implemented
+in V4L2. The use of these ioctls for that purpose has been made obsolete
+and proper V4L2 ioctls or controls have been created to replace that
+functionality.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    video_types
+    video_function_calls
diff --git a/Documentation/userspace-api/media/dvb/video_function_calls.rst b/Documentation/userspace-api/media/dvb/video_function_calls.rst
new file mode 100644
index 000000000..20a897be5
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video_function_calls.rst
@@ -0,0 +1,35 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _video_function_calls:
+
+********************
+Video Function Calls
+********************
+
+.. toctree::
+    :maxdepth: 1
+
+    video-fopen
+    video-fclose
+    video-fwrite
+    video-stop
+    video-play
+    video-freeze
+    video-continue
+    video-select-source
+    video-set-blank
+    video-get-status
+    video-get-frame-count
+    video-get-pts
+    video-get-event
+    video-command
+    video-try-command
+    video-get-size
+    video-set-display-format
+    video-stillpicture
+    video-fast-forward
+    video-slowmotion
+    video-get-capabilities
+    video-clear-buffer
+    video-set-streamtype
+    video-set-format
diff --git a/Documentation/userspace-api/media/dvb/video_types.rst b/Documentation/userspace-api/media/dvb/video_types.rst
new file mode 100644
index 000000000..c4557d328
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/video_types.rst
@@ -0,0 +1,248 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _video_types:
+
+****************
+Video Data Types
+****************
+
+
+.. _video-format-t:
+
+video_format_t
+==============
+
+The ``video_format_t`` data type defined by
+
+
+.. code-block:: c
+
+    typedef enum {
+	VIDEO_FORMAT_4_3,     /* Select 4:3 format */
+	VIDEO_FORMAT_16_9,    /* Select 16:9 format. */
+	VIDEO_FORMAT_221_1    /* 2.21:1 */
+    } video_format_t;
+
+is used in the VIDEO_SET_FORMAT function (??) to tell the driver which
+aspect ratio the output hardware (e.g. TV) has. It is also used in the
+data structures video_status (??) returned by VIDEO_GET_STATUS (??)
+and video_event (??) returned by VIDEO_GET_EVENT (??) which report
+about the display format of the current video stream.
+
+
+.. _video-displayformat-t:
+
+video_displayformat_t
+=====================
+
+In case the display format of the video stream and of the display
+hardware differ the application has to specify how to handle the
+cropping of the picture. This can be done using the
+VIDEO_SET_DISPLAY_FORMAT call (??) which accepts
+
+
+.. code-block:: c
+
+    typedef enum {
+	VIDEO_PAN_SCAN,       /* use pan and scan format */
+	VIDEO_LETTER_BOX,     /* use letterbox format */
+	VIDEO_CENTER_CUT_OUT  /* use center cut out format */
+    } video_displayformat_t;
+
+as argument.
+
+
+.. _video-stream-source-t:
+
+video_stream_source_t
+=====================
+
+The video stream source is set through the VIDEO_SELECT_SOURCE call
+and can take the following values, depending on whether we are replaying
+from an internal (demuxer) or external (user write) source.
+
+
+.. code-block:: c
+
+    typedef enum {
+	VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */
+	VIDEO_SOURCE_MEMORY /* If this source is selected, the stream
+		       comes from the user through the write
+		       system call */
+    } video_stream_source_t;
+
+VIDEO_SOURCE_DEMUX selects the demultiplexer (fed either by the
+frontend or the DVR device) as the source of the video stream. If
+VIDEO_SOURCE_MEMORY is selected the stream comes from the application
+through the **write()** system call.
+
+
+.. _video-play-state-t:
+
+video_play_state_t
+==================
+
+The following values can be returned by the VIDEO_GET_STATUS call
+representing the state of video playback.
+
+
+.. code-block:: c
+
+    typedef enum {
+	VIDEO_STOPPED, /* Video is stopped */
+	VIDEO_PLAYING, /* Video is currently playing */
+	VIDEO_FREEZED  /* Video is freezed */
+    } video_play_state_t;
+
+
+.. c:type:: video_command
+
+struct video_command
+====================
+
+The structure must be zeroed before use by the application This ensures
+it can be extended safely in the future.
+
+
+.. code-block:: c
+
+    struct video_command {
+	__u32 cmd;
+	__u32 flags;
+	union {
+	    struct {
+		__u64 pts;
+	    } stop;
+
+	    struct {
+		/* 0 or 1000 specifies normal speed,
+		   1 specifies forward single stepping,
+		   -1 specifies backward single stepping,
+		   >>1: playback at speed/1000 of the normal speed,
+		   <-1: reverse playback at (-speed/1000) of the normal speed. */
+		__s32 speed;
+		__u32 format;
+	    } play;
+
+	    struct {
+		__u32 data[16];
+	    } raw;
+	};
+    };
+
+
+.. _video-size-t:
+
+video_size_t
+============
+
+
+.. code-block:: c
+
+    typedef struct {
+	int w;
+	int h;
+	video_format_t aspect_ratio;
+    } video_size_t;
+
+
+.. c:type:: video_event
+
+struct video_event
+==================
+
+The following is the structure of a video event as it is returned by the
+VIDEO_GET_EVENT call.
+
+
+.. code-block:: c
+
+    struct video_event {
+	__s32 type;
+    #define VIDEO_EVENT_SIZE_CHANGED    1
+    #define VIDEO_EVENT_FRAME_RATE_CHANGED  2
+    #define VIDEO_EVENT_DECODER_STOPPED     3
+    #define VIDEO_EVENT_VSYNC       4
+	long timestamp;
+	union {
+	    video_size_t size;
+	    unsigned int frame_rate;    /* in frames per 1000sec */
+	    unsigned char vsync_field;  /* unknown/odd/even/progressive */
+	} u;
+    };
+
+
+.. c:type:: video_status
+
+struct video_status
+===================
+
+The VIDEO_GET_STATUS call returns the following structure informing
+about various states of the playback operation.
+
+
+.. code-block:: c
+
+    struct video_status {
+	int                   video_blank;   /* blank video on freeze? */
+	video_play_state_t    play_state;    /* current state of playback */
+	video_stream_source_t stream_source; /* current source (demux/memory) */
+	video_format_t        video_format;  /* current aspect ratio of stream */
+	video_displayformat_t display_format;/* selected cropping mode */
+    };
+
+If video_blank is set video will be blanked out if the channel is
+changed or if playback is stopped. Otherwise, the last picture will be
+displayed. play_state indicates if the video is currently frozen,
+stopped, or being played back. The stream_source corresponds to the
+selected source for the video stream. It can come either from the
+demultiplexer or from memory. The video_format indicates the aspect
+ratio (one of 4:3 or 16:9) of the currently played video stream.
+Finally, display_format corresponds to the selected cropping mode in
+case the source video format is not the same as the format of the output
+device.
+
+
+.. c:type:: video_still_picture
+
+struct video_still_picture
+==========================
+
+An I-frame displayed via the VIDEO_STILLPICTURE call is passed on
+within the following structure.
+
+
+.. code-block:: c
+
+    /* pointer to and size of a single iframe in memory */
+    struct video_still_picture {
+	char *iFrame;        /* pointer to a single iframe in memory */
+	int32_t size;
+    };
+
+
+.. _video_caps:
+
+video capabilities
+==================
+
+A call to VIDEO_GET_CAPABILITIES returns an unsigned integer with the
+following bits set according to the hardwares capabilities.
+
+
+.. code-block:: c
+
+     /* bit definitions for capabilities: */
+     /* can the hardware decode MPEG1 and/or MPEG2? */
+     #define VIDEO_CAP_MPEG1   1
+     #define VIDEO_CAP_MPEG2   2
+     /* can you send a system and/or program stream to video device?
+	(you still have to open the video and the audio device but only
+	 send the stream to the video device) */
+     #define VIDEO_CAP_SYS     4
+     #define VIDEO_CAP_PROG    8
+     /* can the driver also handle SPU, NAVI and CSS encoded data?
+	(CSS API is not present yet) */
+     #define VIDEO_CAP_SPU    16
+     #define VIDEO_CAP_NAVI   32
+     #define VIDEO_CAP_CSS    64
diff --git a/Documentation/userspace-api/media/fdl-appendix.rst b/Documentation/userspace-api/media/fdl-appendix.rst
new file mode 100644
index 000000000..683ebed87
--- /dev/null
+++ b/Documentation/userspace-api/media/fdl-appendix.rst
@@ -0,0 +1,471 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _fdl:
+
+******************************
+GNU Free Documentation License
+******************************
+
+
+.. _fdl-preamble:
+
+0. PREAMBLE
+===========
+
+The purpose of this License is to make a manual, textbook, or other
+written document “free” in the sense of freedom: to assure everyone the
+effective freedom to copy and redistribute it, with or without modifying
+it, either commercially or noncommercially. Secondarily, this License
+preserves for the author and publisher a way to get credit for their
+work, while not being considered responsible for modifications made by
+others.
+
+This License is a kind of “copyleft”, which means that derivative works
+of the document must themselves be free in the same sense. It
+complements the GNU General Public License, which is a copyleft license
+designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free program
+should come with manuals providing the same freedoms that the software
+does. But this License is not limited to software manuals; it can be
+used for any textual work, regardless of subject matter or whether it is
+published as a printed book. We recommend this License principally for
+works whose purpose is instruction or reference.
+
+
+.. _fdl-section1:
+
+1. APPLICABILITY AND DEFINITIONS
+================================
+
+
+.. _fdl-document:
+
+This License applies to any manual or other work that contains a notice
+placed by the copyright holder saying it can be distributed under the
+terms of this License. The “Document”, below, refers to any such manual
+or work. Any member of the public is a licensee, and is addressed as
+“you”.
+
+
+.. _fdl-modified:
+
+A “Modified Version” of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+
+.. _fdl-secondary:
+
+A “Secondary Section” is a named appendix or a front-matter section of
+the :ref:`Document <fdl-document>` that deals exclusively with the
+relationship of the publishers or authors of the Document to the
+Document's overall subject (or to related matters) and contains nothing
+that could fall directly within that overall subject. (For example, if
+the Document is in part a textbook of mathematics, a Secondary Section
+may not explain any mathematics.) The relationship could be a matter of
+historical connection with the subject or with related matters, or of
+legal, commercial, philosophical, ethical or political position
+regarding them.
+
+
+.. _fdl-invariant:
+
+The “Invariant Sections” are certain
+:ref:`Secondary Sections <fdl-secondary>` whose titles are designated,
+as being those of Invariant Sections, in the notice that says that the
+:ref:`Document <fdl-document>` is released under this License.
+
+
+.. _fdl-cover-texts:
+
+The “Cover Texts” are certain short passages of text that are listed, as
+Front-Cover Texts or Back-Cover Texts, in the notice that says that the
+:ref:`Document <fdl-document>` is released under this License.
+
+
+.. _fdl-transparent:
+
+A “Transparent” copy of the :ref:`Document <fdl-document>` means a
+machine-readable copy, represented in a format whose specification is
+available to the general public, whose contents can be viewed and edited
+directly and straightforwardly with generic text editors or (for images
+composed of pixels) generic paint programs or (for drawings) some widely
+available drawing editor, and that is suitable for input to text
+formatters or for automatic translation to a variety of formats suitable
+for input to text formatters. A copy made in an otherwise Transparent
+file format whose markup has been designed to thwart or discourage
+subsequent modification by readers is not Transparent. A copy that is
+not “Transparent” is called “Opaque”.
+
+Examples of suitable formats for Transparent copies include plain ASCII
+without markup, Texinfo input format, LaTeX input format, SGML or XML
+using a publicly available DTD, and standard-conforming simple HTML
+designed for human modification. Opaque formats include PostScript, PDF,
+proprietary formats that can be read and edited only by proprietary word
+processors, SGML or XML for which the DTD and/or processing tools are
+not generally available, and the machine-generated HTML produced by some
+word processors for output purposes only.
+
+
+.. _fdl-title-page:
+
+The “Title Page” means, for a printed book, the title page itself, plus
+such following pages as are needed to hold, legibly, the material this
+License requires to appear in the title page. For works in formats which
+do not have any title page as such, “Title Page” means the text near the
+most prominent appearance of the work's title, preceding the beginning
+of the body of the text.
+
+
+.. _fdl-section2:
+
+2. VERBATIM COPYING
+===================
+
+You may copy and distribute the :ref:`Document <fdl-document>` in any
+medium, either commercially or noncommercially, provided that this
+License, the copyright notices, and the license notice saying this
+License applies to the Document are reproduced in all copies, and that
+you add no other conditions whatsoever to those of this License. You may
+not use technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute. However, you may accept
+compensation in exchange for copies. If you distribute a large enough
+number of copies you must also follow the conditions in
+:ref:`section 3 <fdl-section3>`.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+
+.. _fdl-section3:
+
+3. COPYING IN QUANTITY
+======================
+
+If you publish printed copies of the :ref:`Document <fdl-document>`
+numbering more than 100, and the Document's license notice requires
+:ref:`Cover Texts <fdl-cover-texts>`, you must enclose the copies in
+covers that carry, clearly and legibly, all these Cover Texts:
+Front-Cover Texts on the front cover, and Back-Cover Texts on the back
+cover. Both covers must also clearly and legibly identify you as the
+publisher of these copies. The front cover must present the full title
+with all words of the title equally prominent and visible. You may add
+other material on the covers in addition. Copying with changes limited
+to the covers, as long as they preserve the title of the
+:ref:`Document <fdl-document>` and satisfy these conditions, can be
+treated as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute :ref:`Opaque <fdl-transparent>` copies of
+the :ref:`Document <fdl-document>` numbering more than 100, you must
+either include a machine-readable :ref:`Transparent <fdl-transparent>`
+copy along with each Opaque copy, or state in or with each Opaque copy a
+publicly-accessible computer-network location containing a complete
+Transparent copy of the Document, free of added material, which the
+general network-using public has access to download anonymously at no
+charge using public-standard network protocols. If you use the latter
+option, you must take reasonably prudent steps, when you begin
+distribution of Opaque copies in quantity, to ensure that this
+Transparent copy will remain thus accessible at the stated location
+until at least one year after the last time you distribute an Opaque
+copy (directly or through your agents or retailers) of that edition to
+the public.
+
+It is requested, but not required, that you contact the authors of the
+:ref:`Document <fdl-document>` well before redistributing any large
+number of copies, to give them a chance to provide you with an updated
+version of the Document.
+
+
+.. _fdl-section4:
+
+4. MODIFICATIONS
+================
+
+You may copy and distribute a :ref:`Modified Version <fdl-modified>`
+of the :ref:`Document <fdl-document>` under the conditions of sections
+:ref:`2 <fdl-section2>` and :ref:`3 <fdl-section3>` above, provided
+that you release the Modified Version under precisely this License, with
+the Modified Version filling the role of the Document, thus licensing
+distribution and modification of the Modified Version to whoever
+possesses a copy of it. In addition, you must do these things in the
+Modified Version:
+
+-  **A.**
+   Use in the :ref:`Title Page <fdl-title-page>` (and on the covers,
+   if any) a title distinct from that of the
+   :ref:`Document <fdl-document>`, and from those of previous versions
+   (which should, if there were any, be listed in the History section of
+   the Document). You may use the same title as a previous version if
+   the original publisher of that version gives permission.
+
+-  **B.**
+   List on the :ref:`Title Page <fdl-title-page>`, as authors, one or
+   more persons or entities responsible for authorship of the
+   modifications in the :ref:`Modified Version <fdl-modified>`,
+   together with at least five of the principal authors of the
+   :ref:`Document <fdl-document>` (all of its principal authors, if it
+   has less than five).
+
+-  **C.**
+   State on the :ref:`Title Page <fdl-title-page>` the name of the
+   publisher of the :ref:`Modified Version <fdl-modified>`, as the
+   publisher.
+
+-  **D.**
+   Preserve all the copyright notices of the
+   :ref:`Document <fdl-document>`.
+
+-  **E.**
+   Add an appropriate copyright notice for your modifications adjacent
+   to the other copyright notices.
+
+-  **F.**
+   Include, immediately after the copyright notices, a license notice
+   giving the public permission to use the
+   :ref:`Modified Version <fdl-modified>` under the terms of this
+   License, in the form shown in the Addendum below.
+
+-  **G.**
+   Preserve in that license notice the full lists of
+   :ref:`Invariant Sections <fdl-invariant>` and required
+   :ref:`Cover Texts <fdl-cover-texts>` given in the
+   :ref:`Document's <fdl-document>` license notice.
+
+-  **H.**
+   Include an unaltered copy of this License.
+
+-  **I.**
+   Preserve the section entitled “History”, and its title, and add to it
+   an item stating at least the title, year, new authors, and publisher
+   of the :ref:`Modified Version <fdl-modified>` as given on the
+   :ref:`Title Page <fdl-title-page>`. If there is no section entitled
+   “History” in the :ref:`Document <fdl-document>`, create one stating
+   the title, year, authors, and publisher of the Document as given on
+   its Title Page, then add an item describing the Modified Version as
+   stated in the previous sentence.
+
+-  **J.**
+   Preserve the network location, if any, given in the
+   :ref:`Document <fdl-document>` for public access to a
+   :ref:`Transparent <fdl-transparent>` copy of the Document, and
+   likewise the network locations given in the Document for previous
+   versions it was based on. These may be placed in the “History”
+   section. You may omit a network location for a work that was
+   published at least four years before the Document itself, or if the
+   original publisher of the version it refers to gives permission.
+
+-  **K.**
+   In any section entitled “Acknowledgements” or “Dedications”, preserve
+   the section's title, and preserve in the section all the substance
+   and tone of each of the contributor acknowledgements and/or
+   dedications given therein.
+
+-  **L.**
+   Preserve all the :ref:`Invariant Sections <fdl-invariant>` of the
+   :ref:`Document <fdl-document>`, unaltered in their text and in
+   their titles. Section numbers or the equivalent are not considered
+   part of the section titles.
+
+-  **M.**
+   Delete any section entitled “Endorsements”. Such a section may not be
+   included in the :ref:`Modified Version <fdl-modified>`.
+
+-  **N.**
+   Do not retitle any existing section as “Endorsements” or to conflict
+   in title with any :ref:`Invariant Section <fdl-invariant>`.
+
+If the :ref:`Modified Version <fdl-modified>` includes new
+front-matter sections or appendices that qualify as
+:ref:`Secondary Sections <fdl-secondary>` and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant. To do this, add their titles to the list
+of :ref:`Invariant Sections <fdl-invariant>` in the Modified Version's
+license notice. These titles must be distinct from any other section
+titles.
+
+You may add a section entitled “Endorsements”, provided it contains
+nothing but endorsements of your
+:ref:`Modified Version <fdl-modified>` by various parties--for
+example, statements of peer review or that the text has been approved by
+an organization as the authoritative definition of a standard.
+
+You may add a passage of up to five words as a
+:ref:`Front-Cover Text <fdl-cover-texts>`, and a passage of up to 25
+words as a :ref:`Back-Cover Text <fdl-cover-texts>`, to the end of the
+list of :ref:`Cover Texts <fdl-cover-texts>` in the
+:ref:`Modified Version <fdl-modified>`. Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or through
+arrangements made by) any one entity. If the
+:ref:`Document <fdl-document>` already includes a cover text for the
+same cover, previously added by you or by arrangement made by the same
+entity you are acting on behalf of, you may not add another; but you may
+replace the old one, on explicit permission from the previous publisher
+that added the old one.
+
+The author(s) and publisher(s) of the :ref:`Document <fdl-document>`
+do not by this License give permission to use their names for publicity
+for or to assert or imply endorsement of any
+:ref:`Modified Version <fdl-modified>`.
+
+
+.. _fdl-section5:
+
+5. COMBINING DOCUMENTS
+======================
+
+You may combine the :ref:`Document <fdl-document>` with other
+documents released under this License, under the terms defined in
+:ref:`section 4 <fdl-section4>` above for modified versions, provided
+that you include in the combination all of the
+:ref:`Invariant Sections <fdl-invariant>` of all of the original
+documents, unmodified, and list them all as Invariant Sections of your
+combined work in its license notice.
+
+The combined work need only contain one copy of this License, and
+multiple identical :ref:`Invariant Sections <fdl-invariant>` may be
+replaced with a single copy. If there are multiple Invariant Sections
+with the same name but different contents, make the title of each such
+section unique by adding at the end of it, in parentheses, the name of
+the original author or publisher of that section if known, or else a
+unique number. Make the same adjustment to the section titles in the
+list of Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections entitled “History” in
+the various original documents, forming one section entitled “History”;
+likewise combine any sections entitled “Acknowledgements”, and any
+sections entitled “Dedications”. You must delete all sections entitled
+“Endorsements.”
+
+
+.. _fdl-section6:
+
+6. COLLECTIONS OF DOCUMENTS
+===========================
+
+You may make a collection consisting of the
+:ref:`Document <fdl-document>` and other documents released under this
+License, and replace the individual copies of this License in the
+various documents with a single copy that is included in the collection,
+provided that you follow the rules of this License for verbatim copying
+of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+
+.. _fdl-section7:
+
+7. AGGREGATION WITH INDEPENDENT WORKS
+=====================================
+
+A compilation of the :ref:`Document <fdl-document>` or its derivatives
+with other separate and independent documents or works, in or on a
+volume of a storage or distribution medium, does not as a whole count as
+a :ref:`Modified Version <fdl-modified>` of the Document, provided no
+compilation copyright is claimed for the compilation. Such a compilation
+is called an “aggregate”, and this License does not apply to the other
+self-contained works thus compiled with the Document , on account of
+their being thus compiled, if they are not themselves derivative works
+of the Document. If the :ref:`Cover Text <fdl-cover-texts>`
+requirement of :ref:`section 3 <fdl-section3>` is applicable to these
+copies of the Document, then if the Document is less than one quarter of
+the entire aggregate, the Document's Cover Texts may be placed on covers
+that surround only the Document within the aggregate. Otherwise they
+must appear on covers around the whole aggregate.
+
+
+.. _fdl-section8:
+
+8. TRANSLATION
+==============
+
+Translation is considered a kind of modification, so you may distribute
+translations of the :ref:`Document <fdl-document>` under the terms of
+:ref:`section 4 <fdl-section4>`. Replacing
+:ref:`Invariant Sections <fdl-invariant>` with translations requires
+special permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections. You may include a
+translation of this License provided that you also include the original
+English version of this License. In case of a disagreement between the
+translation and the original English version of this License, the
+original English version will prevail.
+
+
+.. _fdl-section9:
+
+9. TERMINATION
+==============
+
+You may not copy, modify, sublicense, or distribute the
+:ref:`Document <fdl-document>` except as expressly provided for under
+this License. Any other attempt to copy, modify, sublicense or
+distribute the Document is void, and will automatically terminate your
+rights under this License. However, parties who have received copies, or
+rights, from you under this License will not have their licenses
+terminated so long as such parties remain in full compliance.
+
+
+.. _fdl-section10:
+
+10. FUTURE REVISIONS OF THIS LICENSE
+====================================
+
+The `Free Software Foundation <http://www.gnu.org/fsf/fsf.html>`__
+may publish new, revised versions of the GNU Free Documentation License
+from time to time. Such new versions will be similar in spirit to the
+present version, but may differ in detail to address new problems or
+concerns. See
+`http://www.gnu.org/copyleft/ <http://www.gnu.org/copyleft>`__.
+
+Each version of the License is given a distinguishing version number. If
+the :ref:`Document <fdl-document>` specifies that a particular
+numbered version of this License “or any later version” applies to it,
+you have the option of following the terms and conditions either of that
+specified version or of any later version that has been published (not
+as a draft) by the Free Software Foundation. If the Document does not
+specify a version number of this License, you may choose any version
+ever published (not as a draft) by the Free Software Foundation.
+
+
+.. _fdl-using:
+
+Addendum
+========
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and license
+notices just after the title page:
+
+    Copyright © YEAR YOUR NAME.
+
+    Permission is granted to copy, distribute and/or modify this
+    document under the terms of the GNU Free Documentation License,
+    Version 1.1 or any later version published by the Free Software
+    Foundation; with the :ref:`Invariant Sections <fdl-invariant>`
+    being LIST THEIR TITLES, with the
+    :ref:`Front-Cover Texts <fdl-cover-texts>` being LIST, and with
+    the :ref:`Back-Cover Texts <fdl-cover-texts>` being LIST. A copy
+    of the license is included in the section entitled “GNU Free
+    Documentation License”.
+
+If you have no :ref:`Invariant Sections <fdl-invariant>`, write “with
+no Invariant Sections” instead of saying which ones are invariant. If
+you have no :ref:`Front-Cover Texts <fdl-cover-texts>`, write “no
+Front-Cover Texts” instead of “Front-Cover Texts being LIST”; likewise
+for :ref:`Back-Cover Texts <fdl-cover-texts>`.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of free
+software license, such as the
+`GNU General Public License <http://www.gnu.org/copyleft/gpl.html>`__,
+to permit their use in free software.
diff --git a/Documentation/userspace-api/media/frontend.h.rst.exceptions b/Documentation/userspace-api/media/frontend.h.rst.exceptions
new file mode 100644
index 000000000..6283702c0
--- /dev/null
+++ b/Documentation/userspace-api/media/frontend.h.rst.exceptions
@@ -0,0 +1,214 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _DVBFRONTEND_H_
+
+# Group layer A-C symbols together
+replace define DTV_ISDBT_LAYERA_FEC dtv-isdbt-layer-fec
+replace define DTV_ISDBT_LAYERB_FEC dtv-isdbt-layer-fec
+replace define DTV_ISDBT_LAYERC_FEC dtv-isdbt-layer-fec
+replace define DTV_ISDBT_LAYERA_MODULATION dtv-isdbt-layer-modulation
+replace define DTV_ISDBT_LAYERB_MODULATION dtv-isdbt-layer-modulation
+replace define DTV_ISDBT_LAYERC_MODULATION dtv-isdbt-layer-modulation
+replace define DTV_ISDBT_LAYERA_SEGMENT_COUNT dtv-isdbt-layer-segment-count
+replace define DTV_ISDBT_LAYERB_SEGMENT_COUNT dtv-isdbt-layer-segment-count
+replace define DTV_ISDBT_LAYERC_SEGMENT_COUNT dtv-isdbt-layer-segment-count
+replace define DTV_ISDBT_LAYERA_TIME_INTERLEAVING dtv-isdbt-layer-time-interleaving
+replace define DTV_ISDBT_LAYERB_TIME_INTERLEAVING dtv-isdbt-layer-time-interleaving
+replace define DTV_ISDBT_LAYERC_TIME_INTERLEAVING dtv-isdbt-layer-time-interleaving
+
+# Ignore legacy defines
+ignore define DTV_ISDBS_TS_ID_LEGACY
+ignore define SYS_DVBC_ANNEX_AC
+ignore define SYS_DMBTH
+
+# Ignore limits
+ignore define DTV_MAX_COMMAND
+ignore define MAX_DTV_STATS
+ignore define DTV_IOCTL_MAX_MSGS
+
+# the same reference is used for both get and set ioctls
+replace ioctl FE_SET_PROPERTY :c:type:`FE_GET_PROPERTY`
+
+# Typedefs that use the enum reference
+replace typedef fe_sec_voltage_t :c:type:`fe_sec_voltage`
+
+# Replaces for flag constants
+replace define FE_TUNE_MODE_ONESHOT :c:func:`FE_SET_FRONTEND_TUNE_MODE`
+replace define LNA_AUTO dtv-lna
+replace define NO_STREAM_ID_FILTER dtv-stream-id
+
+# Those enums are defined at the frontend.h header, and not externally
+
+ignore symbol FE_IS_STUPID
+ignore symbol FE_CAN_INVERSION_AUTO
+ignore symbol FE_CAN_FEC_1_2
+ignore symbol FE_CAN_FEC_2_3
+ignore symbol FE_CAN_FEC_3_4
+ignore symbol FE_CAN_FEC_4_5
+ignore symbol FE_CAN_FEC_5_6
+ignore symbol FE_CAN_FEC_6_7
+ignore symbol FE_CAN_FEC_7_8
+ignore symbol FE_CAN_FEC_8_9
+ignore symbol FE_CAN_FEC_AUTO
+ignore symbol FE_CAN_QPSK
+ignore symbol FE_CAN_QAM_16
+ignore symbol FE_CAN_QAM_32
+ignore symbol FE_CAN_QAM_64
+ignore symbol FE_CAN_QAM_128
+ignore symbol FE_CAN_QAM_256
+ignore symbol FE_CAN_QAM_AUTO
+ignore symbol FE_CAN_TRANSMISSION_MODE_AUTO
+ignore symbol FE_CAN_BANDWIDTH_AUTO
+ignore symbol FE_CAN_GUARD_INTERVAL_AUTO
+ignore symbol FE_CAN_HIERARCHY_AUTO
+ignore symbol FE_CAN_8VSB
+ignore symbol FE_CAN_16VSB
+ignore symbol FE_HAS_EXTENDED_CAPS
+ignore symbol FE_CAN_MULTISTREAM
+ignore symbol FE_CAN_TURBO_FEC
+ignore symbol FE_CAN_2G_MODULATION
+ignore symbol FE_NEEDS_BENDING
+ignore symbol FE_CAN_RECOVER
+ignore symbol FE_CAN_MUTE_TS
+
+ignore symbol QPSK
+ignore symbol QAM_16
+ignore symbol QAM_32
+ignore symbol QAM_64
+ignore symbol QAM_128
+ignore symbol QAM_256
+ignore symbol QAM_AUTO
+ignore symbol VSB_8
+ignore symbol VSB_16
+ignore symbol PSK_8
+ignore symbol APSK_16
+ignore symbol APSK_32
+ignore symbol DQPSK
+ignore symbol QAM_4_NR
+
+ignore symbol SEC_VOLTAGE_13
+ignore symbol SEC_VOLTAGE_18
+ignore symbol SEC_VOLTAGE_OFF
+
+ignore symbol SEC_TONE_ON
+ignore symbol SEC_TONE_OFF
+
+ignore symbol SEC_MINI_A
+ignore symbol SEC_MINI_B
+
+ignore symbol FE_NONE
+ignore symbol FE_HAS_SIGNAL
+ignore symbol FE_HAS_CARRIER
+ignore symbol FE_HAS_VITERBI
+ignore symbol FE_HAS_SYNC
+ignore symbol FE_HAS_LOCK
+ignore symbol FE_REINIT
+ignore symbol FE_TIMEDOUT
+
+ignore symbol FEC_NONE
+ignore symbol FEC_1_2
+ignore symbol FEC_2_3
+ignore symbol FEC_3_4
+ignore symbol FEC_4_5
+ignore symbol FEC_5_6
+ignore symbol FEC_6_7
+ignore symbol FEC_7_8
+ignore symbol FEC_8_9
+ignore symbol FEC_AUTO
+ignore symbol FEC_3_5
+ignore symbol FEC_9_10
+ignore symbol FEC_2_5
+
+ignore symbol TRANSMISSION_MODE_AUTO
+ignore symbol TRANSMISSION_MODE_1K
+ignore symbol TRANSMISSION_MODE_2K
+ignore symbol TRANSMISSION_MODE_8K
+ignore symbol TRANSMISSION_MODE_4K
+ignore symbol TRANSMISSION_MODE_16K
+ignore symbol TRANSMISSION_MODE_32K
+ignore symbol TRANSMISSION_MODE_C1
+ignore symbol TRANSMISSION_MODE_C3780
+ignore symbol TRANSMISSION_MODE_2K
+ignore symbol TRANSMISSION_MODE_8K
+
+ignore symbol GUARD_INTERVAL_AUTO
+ignore symbol GUARD_INTERVAL_1_128
+ignore symbol GUARD_INTERVAL_1_32
+ignore symbol GUARD_INTERVAL_1_16
+ignore symbol GUARD_INTERVAL_1_8
+ignore symbol GUARD_INTERVAL_1_4
+ignore symbol GUARD_INTERVAL_19_128
+ignore symbol GUARD_INTERVAL_19_256
+ignore symbol GUARD_INTERVAL_PN420
+ignore symbol GUARD_INTERVAL_PN595
+ignore symbol GUARD_INTERVAL_PN945
+
+ignore symbol HIERARCHY_NONE
+ignore symbol HIERARCHY_AUTO
+ignore symbol HIERARCHY_1
+ignore symbol HIERARCHY_2
+ignore symbol HIERARCHY_4
+
+ignore symbol INTERLEAVING_NONE
+ignore symbol INTERLEAVING_AUTO
+ignore symbol INTERLEAVING_240
+ignore symbol INTERLEAVING_720
+
+ignore symbol PILOT_ON
+ignore symbol PILOT_OFF
+ignore symbol PILOT_AUTO
+
+ignore symbol ROLLOFF_35
+ignore symbol ROLLOFF_20
+ignore symbol ROLLOFF_25
+ignore symbol ROLLOFF_AUTO
+
+ignore symbol INVERSION_ON
+ignore symbol INVERSION_OFF
+ignore symbol INVERSION_AUTO
+
+ignore symbol SYS_UNDEFINED
+ignore symbol SYS_DVBC_ANNEX_A
+ignore symbol SYS_DVBC_ANNEX_B
+ignore symbol SYS_DVBC_ANNEX_C
+ignore symbol SYS_ISDBC
+ignore symbol SYS_DVBT
+ignore symbol SYS_DVBT2
+ignore symbol SYS_ISDBT
+ignore symbol SYS_ATSC
+ignore symbol SYS_ATSCMH
+ignore symbol SYS_DTMB
+ignore symbol SYS_DVBS
+ignore symbol SYS_DVBS2
+ignore symbol SYS_TURBO
+ignore symbol SYS_ISDBS
+ignore symbol SYS_DAB
+ignore symbol SYS_DSS
+ignore symbol SYS_CMMB
+ignore symbol SYS_DVBH
+
+ignore symbol ATSCMH_SCCC_BLK_SEP
+ignore symbol ATSCMH_SCCC_BLK_COMB
+ignore symbol ATSCMH_SCCC_BLK_RES
+
+ignore symbol ATSCMH_SCCC_CODE_HLF
+ignore symbol ATSCMH_SCCC_CODE_QTR
+ignore symbol ATSCMH_SCCC_CODE_RES
+
+ignore symbol ATSCMH_RSFRAME_ENS_PRI
+ignore symbol ATSCMH_RSFRAME_ENS_SEC
+
+ignore symbol ATSCMH_RSFRAME_PRI_ONLY
+ignore symbol ATSCMH_RSFRAME_PRI_SEC
+ignore symbol ATSCMH_RSFRAME_RES
+
+ignore symbol ATSCMH_RSCODE_211_187
+ignore symbol ATSCMH_RSCODE_223_187
+ignore symbol ATSCMH_RSCODE_235_187
+ignore symbol ATSCMH_RSCODE_RES
+
+ignore symbol FE_SCALE_NOT_AVAILABLE
+ignore symbol FE_SCALE_DECIBEL
+ignore symbol FE_SCALE_RELATIVE
+ignore symbol FE_SCALE_COUNTER
diff --git a/Documentation/userspace-api/media/gen-errors.rst b/Documentation/userspace-api/media/gen-errors.rst
new file mode 100644
index 000000000..e595d0bea
--- /dev/null
+++ b/Documentation/userspace-api/media/gen-errors.rst
@@ -0,0 +1,96 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _gen_errors:
+
+*******************
+Generic Error Codes
+*******************
+
+
+.. _gen-errors:
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table:: Generic error codes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 16
+
+
+    -  -  ``EAGAIN`` (aka ``EWOULDBLOCK``)
+
+       -  The ioctl can't be handled because the device is in state where it
+	  can't perform it. This could happen for example in case where
+	  device is sleeping and ioctl is performed to query statistics. It
+	  is also returned when the ioctl would need to wait for an event,
+	  but the device was opened in non-blocking mode.
+
+    -  -  ``EBADF``
+
+       -  The file descriptor is not a valid.
+
+    -  -  ``EBUSY``
+
+       -  The ioctl can't be handled because the device is busy. This is
+	  typically return while device is streaming, and an ioctl tried to
+	  change something that would affect the stream, or would require
+	  the usage of a hardware resource that was already allocated. The
+	  ioctl must not be retried without performing another action to fix
+	  the problem first (typically: stop the stream before retrying).
+
+    -  -  ``EFAULT``
+
+       -  There was a failure while copying data from/to userspace, probably
+	  caused by an invalid pointer reference.
+
+    -  -  ``EINVAL``
+
+       -  One or more of the ioctl parameters are invalid or out of the
+	  allowed range. This is a widely used error code. See the
+	  individual ioctl requests for specific causes.
+
+    -  -  ``ENODEV``
+
+       -  Device not found or was removed.
+
+    -  -  ``ENOMEM``
+
+       -  There's not enough memory to handle the desired operation.
+
+    -  -  ``ENOTTY``
+
+       -  The ioctl is not supported by the driver, actually meaning that
+	  the required functionality is not available, or the file
+	  descriptor is not for a media device.
+
+    -  -  ``ENOSPC``
+
+       -  On USB devices, the stream ioctl's can return this error, meaning
+	  that this request would overcommit the usb bandwidth reserved for
+	  periodic transfers (up to 80% of the USB bandwidth).
+
+    -  -  ``EPERM``
+
+       -  Permission denied. Can be returned if the device needs write
+	  permission, or some special capabilities is needed (e. g. root)
+
+    -  -  ``EIO``
+
+       -  I/O error. Typically used when there are problems communicating with
+          a hardware device. This could indicate broken or flaky hardware.
+	  It's a 'Something is wrong, I give up!' type of error.
+
+    -  - ``ENXIO``
+
+       -  No device corresponding to this device special file exists.
+
+
+.. note::
+
+  #. This list is not exhaustive; ioctls may return other error codes.
+     Since errors may have side effects such as a driver reset,
+     applications should abort on unexpected errors, or otherwise
+     assume that the device is in a bad state.
+
+  #. Request-specific error codes are listed in the individual
+     requests descriptions.
diff --git a/Documentation/userspace-api/media/glossary.rst b/Documentation/userspace-api/media/glossary.rst
new file mode 100644
index 000000000..cb165d717
--- /dev/null
+++ b/Documentation/userspace-api/media/glossary.rst
@@ -0,0 +1,205 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+
+========
+Glossary
+========
+
+.. note::
+
+   The goal of this section is to standardize the terms used within the media
+   userspace API documentation. This is Work In Progress.
+
+.. Please keep the glossary entries in alphabetical order
+
+.. glossary::
+
+    Bridge Driver
+	A :term:`Device Driver` that implements the main logic to talk with
+	media hardware.
+
+    CEC API
+	**Consumer Electronics Control API**
+
+	An API designed to receive and transmit data via an HDMI
+	CEC interface.
+
+	See :ref:`cec`.
+
+    Device Driver
+	Part of the Linux Kernel that implements support for a hardware
+	component.
+
+    Device Node
+	A character device node in the file system used to control and
+	transfer data in and out of a Kernel driver.
+
+    Digital TV API
+	**Previously known as DVB API**
+
+	An API designed to control a subset of the :term:`Media Hardware`
+	that implements	digital TV (e. g. DVB, ATSC, ISDB, etc).
+
+	See :ref:`dvbapi`.
+
+    DSP
+        **Digital Signal Processor**
+
+	A specialized :term:`Microprocessor`, with its architecture
+	optimized for the operational needs of digital signal processing.
+
+    FPGA
+	**Field-programmable Gate Array**
+
+	An :term:`IC` circuit designed to be configured by a customer or
+	a designer after manufacturing.
+
+	See https://en.wikipedia.org/wiki/Field-programmable_gate_array.
+
+    Hardware Component
+	A subset of the :term:`Media Hardware`. For example an :term:`I²C` or
+	:term:`SPI` device, or an :term:`IP Block` inside an
+	:term:`SoC` or :term:`FPGA`.
+
+    Hardware Peripheral
+	A group of :term:`hardware components <Hardware Component>` that
+	together make a larger user-facing functional peripheral. For
+	instance, the :term:`SoC` :term:`ISP` :term:`IP Block`
+	and the external camera sensors together make a camera hardware
+	peripheral.
+
+	Also known as :term:`Peripheral`.
+
+    I²C
+	**Inter-Integrated Circuit**
+
+	A  multi-master, multi-slave, packet switched, single-ended,
+	serial computer bus used to control some hardware components
+	like sub-device hardware components.
+
+	See http://www.nxp.com/docs/en/user-guide/UM10204.pdf.
+
+    IC
+	**Integrated circuit**
+
+	A set of electronic circuits on one small flat piece of
+	semiconductor material, normally silicon.
+
+	Also known as chip.
+
+    IP Block
+	**Intellectual property core**
+
+	In electronic design a semiconductor intellectual property core,
+	is a reusable unit of logic, cell, or integrated circuit layout
+	design that is the intellectual property of one party.
+	IP Blocks may be licensed to another party or can be owned
+	and used by a single party alone.
+
+	See https://en.wikipedia.org/wiki/Semiconductor_intellectual_property_core).
+
+    ISP
+	**Image Signal Processor**
+
+	A specialized processor that implements a set of algorithms for
+	processing image data. ISPs may implement algorithms for lens
+	shading correction, demosaicing, scaling and pixel format conversion
+	as well as produce statistics for the use of the control
+	algorithms (e.g. automatic exposure, white balance and focus).
+
+    Media API
+	A set of userspace APIs used to control the media hardware. It is
+	composed by:
+
+	  - :term:`CEC API`;
+	  - :term:`Digital TV API`;
+	  - :term:`MC API`;
+	  - :term:`RC API`; and
+	  - :term:`V4L2 API`.
+
+	See :doc:`index`.
+
+    MC API
+	**Media Controller API**
+
+	An API designed to expose and control the relationships between
+	multimedia devices and sub-devices.
+
+	See :ref:`media_controller`.
+
+    MC-centric
+	:term:`V4L2 Hardware` device driver that requires :term:`MC API`.
+
+	Such drivers have ``V4L2_CAP_IO_MC`` device_caps field set
+	(see :ref:`VIDIOC_QUERYCAP`).
+
+	See :ref:`v4l2_hardware_control` for more details.
+
+    Media Hardware
+	Subset of the hardware that is supported by the Linux Media API.
+
+	This includes audio and video capture and playback hardware,
+	digital and analog TV, camera sensors, ISPs, remote controllers,
+	codecs, HDMI Consumer Electronics Control, HDMI capture, etc.
+
+    Microprocessor
+	Electronic circuitry that carries out the instructions of a
+	computer program by performing the basic arithmetic, logical,
+	control and input/output (I/O) operations specified by the
+	instructions on a single integrated circuit.
+
+    Peripheral
+	The same as :term:`Hardware Peripheral`.
+
+    RC API
+	**Remote Controller API**
+
+	An API designed to receive and transmit data from remote
+	controllers.
+
+	See :ref:`remote_controllers`.
+
+    SMBus
+	A subset of I²C, which defines a stricter usage of the bus.
+
+    SPI
+	**Serial Peripheral Interface Bus**
+
+	Synchronous serial communication interface specification used for
+	short distance communication, primarily in embedded systems.
+
+    SoC
+	**System on a Chip**
+
+	An integrated circuit that integrates all components of a computer
+	or other electronic systems.
+
+    V4L2 API
+	**V4L2 userspace API**
+
+	The userspace API defined in :ref:`v4l2spec`, which is used to
+	control a V4L2 hardware.
+
+    V4L2 Device Node
+	A :term:`Device Node` that is associated to a V4L driver.
+
+	The V4L2 device node naming is specified at :ref:`v4l2_device_naming`.
+
+    V4L2 Hardware
+	Part of the media hardware which is supported by the :term:`V4L2 API`.
+
+    V4L2 Sub-device
+	V4L2 hardware components that aren't controlled by a
+	:term:`Bridge Driver`. See :ref:`subdev`.
+
+    Video-node-centric
+	V4L2 device driver that doesn't require a media controller to be used.
+
+	Such drivers have the ``V4L2_CAP_IO_MC`` device_caps field unset
+	(see :ref:`VIDIOC_QUERYCAP`).
+
+    V4L2 Sub-device API
+	Part of the :term:`V4L2 API` which control
+	:term:`V4L2 sub-devices <V4L2 Sub-device>`, like sensors,
+	HDMI receivers, scalers, deinterlacers.
+
+	See :ref:`v4l2_hardware_control` for more details.
diff --git a/Documentation/userspace-api/media/index.rst b/Documentation/userspace-api/media/index.rst
new file mode 100644
index 000000000..7f42f83b9
--- /dev/null
+++ b/Documentation/userspace-api/media/index.rst
@@ -0,0 +1,70 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: <isonum.txt>
+
+########################################
+Linux Media Infrastructure userspace API
+########################################
+
+This section contains the  driver development information and Kernel APIs
+used by media devices.
+
+Please see:
+
+- :doc:`/admin-guide/media/index`
+    for usage information about media subsystem and supported drivers;
+
+- :doc:`/driver-api/media/index`
+     for driver development information and Kernel APIs used by
+     media devices;
+
+
+.. only:: html
+
+   .. class:: toc-title
+
+        Table of Contents
+
+.. toctree::
+    :maxdepth: 1
+
+    intro
+    v4l/v4l2
+    dvb/dvbapi
+    rc/remote_controllers
+    mediactl/media-controller
+    cec/cec-api
+    gen-errors
+
+    glossary
+
+    fdl-appendix
+
+    drivers/index
+
+**Copyright** |copy| 2009-2020 : LinuxTV Developers
+
+::
+
+  Permission is granted to copy, distribute and/or modify this document
+  under the terms of the GNU Free Documentation License, Version 1.1 or
+  any later version published by the Free Software Foundation, with no
+  Invariant Sections. A copy of the license is included in the chapter
+  entitled "GNU Free Documentation License".
+
+Please notice that some documents inside the media userspace API,
+when explicitly mentioned on its source code, are dual-licensed
+with GNU Free Documentation License  Version 1.1 and with the
+GNU General Public License::
+
+  This documentation is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by the Free
+  Software Foundation; either version 2 of the License, or (at your option) any
+  later version.
+
+  This program is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+  more details.
+
+  For more details see the file COPYING in the source distribution of Linux.
diff --git a/Documentation/userspace-api/media/intro.rst b/Documentation/userspace-api/media/intro.rst
new file mode 100644
index 000000000..4a6bd665b
--- /dev/null
+++ b/Documentation/userspace-api/media/intro.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+============
+Introduction
+============
+
+This document covers the Linux Kernel to Userspace API's used by video
+and radio streaming devices, including video cameras, analog and digital
+TV receiver cards, AM/FM receiver cards, Software Defined Radio (SDR),
+streaming capture and output devices, codec devices and remote controllers.
+
+A typical media device hardware is shown at :ref:`typical_media_device`.
+
+.. _typical_media_device:
+
+.. kernel-figure:: typical_media_device.svg
+    :alt:   typical_media_device.svg
+    :align: center
+
+    Typical Media Device
+
+The media infrastructure API was designed to control such devices. It is
+divided into five parts.
+
+1. The :ref:`first part <v4l2spec>` covers radio, video capture and output,
+   cameras, analog TV devices and codecs.
+
+2. The :ref:`second part <dvbapi>` covers the API used for digital TV and
+   Internet reception via one of the several digital tv standards. While it is
+   called as DVB API, in fact it covers several different video standards
+   including DVB-T/T2, DVB-S/S2, DVB-C, ATSC, ISDB-T, ISDB-S, DTMB, etc. The
+   complete list of supported standards can be found at
+   :c:type:`fe_delivery_system`.
+
+3. The :ref:`third part <remote_controllers>` covers the Remote Controller API.
+
+4. The :ref:`fourth part <media_controller>` covers the Media Controller API.
+
+5. The :ref:`fifth part <cec>` covers the CEC (Consumer Electronics Control) API.
+
+It should also be noted that a media device may also have audio components, like
+mixers, PCM capture, PCM playback, etc, which are controlled via ALSA API.  For
+additional information and for the latest development code, see:
+`https://linuxtv.org <https://linuxtv.org>`__.  For discussing improvements,
+reporting troubles, sending new drivers, etc, please mail to: `Linux Media
+Mailing List (LMML) <http://vger.kernel.org/vger-lists.html#linux-media>`__.
diff --git a/Documentation/userspace-api/media/lirc.h.rst.exceptions b/Documentation/userspace-api/media/lirc.h.rst.exceptions
new file mode 100644
index 000000000..ac768d769
--- /dev/null
+++ b/Documentation/userspace-api/media/lirc.h.rst.exceptions
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _LINUX_LIRC_H
+
+# Ignore helper macros
+
+ignore define lirc_t
+
+ignore define LIRC_SPACE
+ignore define LIRC_PULSE
+ignore define LIRC_FREQUENCY
+ignore define LIRC_TIMEOUT
+ignore define LIRC_VALUE
+ignore define LIRC_MODE2
+ignore define LIRC_IS_SPACE
+ignore define LIRC_IS_PULSE
+ignore define LIRC_IS_FREQUENCY
+ignore define LIRC_IS_TIMEOUT
+
+ignore define LIRC_MODE2SEND
+ignore define LIRC_SEND2MODE
+ignore define LIRC_MODE2REC
+ignore define LIRC_REC2MODE
+
+ignore define LIRC_CAN_SEND
+ignore define LIRC_CAN_REC
+
+ignore define LIRC_CAN_SEND_MASK
+ignore define LIRC_CAN_REC_MASK
+ignore define LIRC_CAN_SET_REC_DUTY_CYCLE
+
+# Obsolete ioctls
+
+ignore ioctl LIRC_GET_LENGTH
+
+# rc protocols
+
+ignore symbol RC_PROTO_UNKNOWN
+ignore symbol RC_PROTO_OTHER
+ignore symbol RC_PROTO_RC5
+ignore symbol RC_PROTO_RC5X_20
+ignore symbol RC_PROTO_RC5_SZ
+ignore symbol RC_PROTO_JVC
+ignore symbol RC_PROTO_SONY12
+ignore symbol RC_PROTO_SONY15
+ignore symbol RC_PROTO_SONY20
+ignore symbol RC_PROTO_NEC
+ignore symbol RC_PROTO_NECX
+ignore symbol RC_PROTO_NEC32
+ignore symbol RC_PROTO_SANYO
+ignore symbol RC_PROTO_MCIR2_KBD
+ignore symbol RC_PROTO_MCIR2_MSE
+ignore symbol RC_PROTO_RC6_0
+ignore symbol RC_PROTO_RC6_6A_20
+ignore symbol RC_PROTO_RC6_6A_24
+ignore symbol RC_PROTO_RC6_6A_32
+ignore symbol RC_PROTO_RC6_MCE
+ignore symbol RC_PROTO_SHARP
+ignore symbol RC_PROTO_XMP
+ignore symbol RC_PROTO_CEC
+ignore symbol RC_PROTO_IMON
+ignore symbol RC_PROTO_RCMM12
+ignore symbol RC_PROTO_RCMM24
+ignore symbol RC_PROTO_RCMM32
+ignore symbol RC_PROTO_XBOX_DVD
+
+# Undocumented macros
+
+ignore define PULSE_BIT
+ignore define PULSE_MASK
+
+ignore define LIRC_MODE2_SPACE
+ignore define LIRC_MODE2_PULSE
+
+ignore define LIRC_VALUE_MASK
+ignore define LIRC_MODE2_MASK
+
+ignore define LIRC_MODE_RAW
+ignore define LIRC_MODE_LIRCCODE
diff --git a/Documentation/userspace-api/media/media.h.rst.exceptions b/Documentation/userspace-api/media/media.h.rst.exceptions
new file mode 100644
index 000000000..9b4c26502
--- /dev/null
+++ b/Documentation/userspace-api/media/media.h.rst.exceptions
@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define __LINUX_MEDIA_H
+
+# Ignore macros
+ignore define MEDIA_API_VERSION
+ignore define MEDIA_ENT_F_BASE
+ignore define MEDIA_ENT_F_OLD_BASE
+ignore define MEDIA_ENT_F_OLD_SUBDEV_BASE
+ignore define MEDIA_ENT_F_DTV_DECODER
+ignore define MEDIA_INTF_T_DVB_BASE
+ignore define MEDIA_INTF_T_V4L_BASE
+ignore define MEDIA_INTF_T_ALSA_BASE
+#ignore legacy entity type macros
+ignore define MEDIA_ENT_TYPE_SHIFT
+ignore define MEDIA_ENT_TYPE_MASK
+ignore define MEDIA_ENT_SUBTYPE_MASK
+ignore define MEDIA_ENT_T_DEVNODE_UNKNOWN
+ignore define MEDIA_ENT_T_DEVNODE
+ignore define MEDIA_ENT_T_DEVNODE_V4L
+ignore define MEDIA_ENT_T_DEVNODE_FB
+ignore define MEDIA_ENT_T_DEVNODE_ALSA
+ignore define MEDIA_ENT_T_DEVNODE_DVB
+ignore define MEDIA_ENT_T_UNKNOWN
+ignore define MEDIA_ENT_T_V4L2_VIDEO
+ignore define MEDIA_ENT_T_V4L2_SUBDEV
+ignore define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR
+ignore define MEDIA_ENT_T_V4L2_SUBDEV_FLASH
+ignore define MEDIA_ENT_T_V4L2_SUBDEV_LENS
+ignore define MEDIA_ENT_T_V4L2_SUBDEV_DECODER
+ignore define MEDIA_ENT_T_V4L2_SUBDEV_TUNER
diff --git a/Documentation/userspace-api/media/mediactl/media-controller-intro.rst b/Documentation/userspace-api/media/mediactl/media-controller-intro.rst
new file mode 100644
index 000000000..fce7eafc3
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-controller-intro.rst
@@ -0,0 +1,33 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _media-controller-intro:
+
+Introduction
+============
+
+Media devices increasingly handle multiple related functions. Many USB
+cameras include microphones, video capture hardware can also output
+video, or SoC camera interfaces also perform memory-to-memory operations
+similar to video codecs.
+
+Independent functions, even when implemented in the same hardware, can
+be modelled as separate devices. A USB camera with a microphone will be
+presented to userspace applications as V4L2 and ALSA capture devices.
+The devices' relationships (when using a webcam, end-users shouldn't
+have to manually select the associated USB microphone), while not made
+available directly to applications by the drivers, can usually be
+retrieved from sysfs.
+
+With more and more advanced SoC devices being introduced, the current
+approach will not scale. Device topologies are getting increasingly
+complex and can't always be represented by a tree structure. Hardware
+blocks are shared between different functions, creating dependencies
+between seemingly unrelated devices.
+
+Kernel abstraction APIs such as V4L2 and ALSA provide means for
+applications to access hardware parameters. As newer hardware expose an
+increasingly high number of those parameters, drivers need to guess what
+applications really require based on limited information, thereby
+implementing policies that belong to userspace.
+
+The media controller API aims at solving those problems.
diff --git a/Documentation/userspace-api/media/mediactl/media-controller-model.rst b/Documentation/userspace-api/media/mediactl/media-controller-model.rst
new file mode 100644
index 000000000..222cb99de
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-controller-model.rst
@@ -0,0 +1,35 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _media-controller-model:
+
+Media device model
+==================
+
+Discovering a device internal topology, and configuring it at runtime,
+is one of the goals of the media controller API. To achieve this,
+hardware devices and Linux Kernel interfaces are modelled as graph
+objects on an oriented graph. The object types that constitute the graph
+are:
+
+-  An **entity** is a basic media hardware or software building block.
+   It can correspond to a large variety of logical blocks such as
+   physical hardware devices (CMOS sensor for instance), logical
+   hardware devices (a building block in a System-on-Chip image
+   processing pipeline), DMA channels or physical connectors.
+
+-  An **interface** is a graph representation of a Linux Kernel
+   userspace API interface, like a device node or a sysfs file that
+   controls one or more entities in the graph.
+
+-  A **pad** is a data connection endpoint through which an entity can
+   interact with other entities. Data (not restricted to video) produced
+   by an entity flows from the entity's output to one or more entity
+   inputs. Pads should not be confused with physical pins at chip
+   boundaries.
+
+-  A **data link** is a point-to-point oriented connection between two
+   pads, either on the same entity or on different entities. Data flows
+   from a source pad to a sink pad.
+
+-  An **interface link** is a point-to-point bidirectional control
+   connection between a Linux Kernel interface and an entity.
diff --git a/Documentation/userspace-api/media/mediactl/media-controller.rst b/Documentation/userspace-api/media/mediactl/media-controller.rst
new file mode 100644
index 000000000..508dd693b
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-controller.rst
@@ -0,0 +1,54 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. include:: <isonum.txt>
+
+.. _media_controller:
+
+##############################
+Part IV - Media Controller API
+##############################
+
+.. only:: html
+
+   .. class:: toc-title
+
+        Table of Contents
+
+.. toctree::
+    :maxdepth: 5
+    :numbered:
+
+    media-controller-intro
+    media-controller-model
+    media-types
+    request-api
+    media-funcs
+    media-header
+
+
+**********************
+Revision and Copyright
+**********************
+
+Authors:
+
+- Pinchart, Laurent <laurent.pinchart@ideasonboard.com>
+
+ - Initial version.
+
+- Carvalho Chehab, Mauro <mchehab@kernel.org>
+
+ - MEDIA_IOC_G_TOPOLOGY documentation and documentation improvements.
+
+**Copyright** |copy| 2010 : Laurent Pinchart
+
+**Copyright** |copy| 2015-2016 : Mauro Carvalho Chehab
+
+****************
+Revision History
+****************
+
+:revision: 1.1.0 / 2015-12-12 (*mcc*)
+
+:revision: 1.0.0 / 2010-11-10 (*lp*)
+
+Initial revision
diff --git a/Documentation/userspace-api/media/mediactl/media-func-close.rst b/Documentation/userspace-api/media/mediactl/media-func-close.rst
new file mode 100644
index 000000000..8ac2443e7
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-func-close.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media-func-close:
+
+*************
+media close()
+*************
+
+Name
+====
+
+media-close - Close a media device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: int close( int fd )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+Description
+===========
+
+Closes the media device. Resources associated with the file descriptor
+are freed. The device configuration remain unchanged.
+
+Return Value
+============
+
+:c:func:`close()` returns 0 on success. On error, -1 is returned, and
+``errno`` is set appropriately. Possible error codes are:
+
+EBADF
+    ``fd`` is not a valid open file descriptor.
diff --git a/Documentation/userspace-api/media/mediactl/media-func-ioctl.rst b/Documentation/userspace-api/media/mediactl/media-func-ioctl.rst
new file mode 100644
index 000000000..9e9a838f4
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-func-ioctl.rst
@@ -0,0 +1,63 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media-func-ioctl:
+
+*************
+media ioctl()
+*************
+
+Name
+====
+
+media-ioctl - Control a media device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/ioctl.h>
+
+``int ioctl(int fd, int request, void *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``request``
+    Media ioctl request code as defined in the media.h header file, for
+    example MEDIA_IOC_SETUP_LINK.
+
+``argp``
+    Pointer to a request-specific structure.
+
+Description
+===========
+
+The :ref:`ioctl() <media-func-ioctl>` function manipulates media device
+parameters. The argument ``fd`` must be an open file descriptor.
+
+The ioctl ``request`` code specifies the media function to be called. It
+has encoded in it whether the argument is an input, output or read/write
+parameter, and the size of the argument ``argp`` in bytes.
+
+Macros and structures definitions specifying media ioctl requests and
+their parameters are located in the media.h header file. All media ioctl
+requests, their respective function and parameters are specified in
+:ref:`media-user-func`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+Request-specific error codes are listed in the individual requests
+descriptions.
+
+When an ioctl that takes an output or read/write parameter fails, the
+parameter remains unmodified.
diff --git a/Documentation/userspace-api/media/mediactl/media-func-open.rst b/Documentation/userspace-api/media/mediactl/media-func-open.rst
new file mode 100644
index 000000000..24487cb0a
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-func-open.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media-func-open:
+
+************
+media open()
+************
+
+Name
+====
+
+media-open - Open a media device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <fcntl.h>
+
+.. c:function:: int open( const char *device_name, int flags )
+
+Arguments
+=========
+
+``device_name``
+    Device to be opened.
+
+``flags``
+    Open flags. Access mode must be either ``O_RDONLY`` or ``O_RDWR``.
+    Other flags have no effect.
+
+Description
+===========
+
+To open a media device applications call :c:func:`open()` with the
+desired device name. The function has no side effects; the device
+configuration remain unchanged.
+
+When the device is opened in read-only mode, attempts to modify its
+configuration will result in an error, and ``errno`` will be set to
+EBADF.
+
+Return Value
+============
+
+:c:func:`open()` returns the new file descriptor on success. On error,
+-1 is returned, and ``errno`` is set appropriately. Possible error codes
+are:
+
+EACCES
+    The requested access to the file is not allowed.
+
+EMFILE
+    The process already has the maximum number of files open.
+
+ENFILE
+    The system limit on the total number of open files has been reached.
+
+ENOMEM
+    Insufficient kernel memory was available.
+
+ENXIO
+    No device corresponding to this device special file exists.
diff --git a/Documentation/userspace-api/media/mediactl/media-funcs.rst b/Documentation/userspace-api/media/mediactl/media-funcs.rst
new file mode 100644
index 000000000..e89629681
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-funcs.rst
@@ -0,0 +1,26 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _media-user-func:
+
+******************
+Function Reference
+******************
+
+
+.. toctree::
+    :maxdepth: 1
+
+    media-func-open
+    media-func-close
+    media-func-ioctl
+    media-ioc-device-info
+    media-ioc-g-topology
+    media-ioc-enum-entities
+    media-ioc-enum-links
+    media-ioc-setup-link
+    media-ioc-request-alloc
+    request-func-close
+    request-func-ioctl
+    request-func-poll
+    media-request-ioc-queue
+    media-request-ioc-reinit
diff --git a/Documentation/userspace-api/media/mediactl/media-header.rst b/Documentation/userspace-api/media/mediactl/media-header.rst
new file mode 100644
index 000000000..c674271c9
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-header.rst
@@ -0,0 +1,10 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _media_header:
+
+****************************
+Media Controller Header File
+****************************
+
+.. kernel-include:: $BUILDDIR/media.h.rst
+
diff --git a/Documentation/userspace-api/media/mediactl/media-ioc-device-info.rst b/Documentation/userspace-api/media/mediactl/media-ioc-device-info.rst
new file mode 100644
index 000000000..0c4c5d2cf
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-ioc-device-info.rst
@@ -0,0 +1,106 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media_ioc_device_info:
+
+***************************
+ioctl MEDIA_IOC_DEVICE_INFO
+***************************
+
+Name
+====
+
+MEDIA_IOC_DEVICE_INFO - Query device information
+
+Synopsis
+========
+
+.. c:macro:: MEDIA_IOC_DEVICE_INFO
+
+``int ioctl(int fd, MEDIA_IOC_DEVICE_INFO, struct media_device_info *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`media_device_info`.
+
+Description
+===========
+
+All media devices must support the ``MEDIA_IOC_DEVICE_INFO`` ioctl. To
+query device information, applications call the ioctl with a pointer to
+a struct :c:type:`media_device_info`. The driver
+fills the structure and returns the information to the application. The
+ioctl never fails.
+
+.. c:type:: media_device_info
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct media_device_info
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    *  -  char
+       -  ``driver``\ [16]
+       -  Name of the driver implementing the media API as a NUL-terminated
+	  ASCII string. The driver version is stored in the
+	  ``driver_version`` field.
+
+	  Driver specific applications can use this information to verify
+	  the driver identity. It is also useful to work around known bugs,
+	  or to identify drivers in error reports.
+
+    *  -  char
+       -  ``model``\ [32]
+       -  Device model name as a NUL-terminated UTF-8 string. The device
+	  version is stored in the ``device_version`` field and is not be
+	  appended to the model name.
+
+    *  -  char
+       -  ``serial``\ [40]
+       -  Serial number as a NUL-terminated ASCII string.
+
+    *  -  char
+       -  ``bus_info``\ [32]
+       -  Location of the device in the system as a NUL-terminated ASCII
+	  string. This includes the bus type name (PCI, USB, ...) and a
+	  bus-specific identifier.
+
+    *  -  __u32
+       -  ``media_version``
+       -  Media API version, formatted with the ``KERNEL_VERSION()`` macro.
+
+    *  -  __u32
+       -  ``hw_revision``
+       -  Hardware device revision in a driver-specific format.
+
+    *  -  __u32
+       -  ``driver_version``
+       -  Media device driver version, formatted with the
+	  ``KERNEL_VERSION()`` macro. Together with the ``driver`` field
+	  this identifies a particular driver.
+
+    *  -  __u32
+       -  ``reserved``\ [31]
+       -  Reserved for future extensions. Drivers and applications must set
+	  this array to zero.
+
+The ``serial`` and ``bus_info`` fields can be used to distinguish
+between multiple instances of otherwise identical hardware. The serial
+number takes precedence when provided and can be assumed to be unique.
+If the serial number is an empty string, the ``bus_info`` field can be
+used instead. The ``bus_info`` field is guaranteed to be unique, but can
+vary across reboots or device unplug/replug.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/mediactl/media-ioc-enum-entities.rst b/Documentation/userspace-api/media/mediactl/media-ioc-enum-entities.rst
new file mode 100644
index 000000000..92dd8ecd5
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-ioc-enum-entities.rst
@@ -0,0 +1,146 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media_ioc_enum_entities:
+
+*****************************
+ioctl MEDIA_IOC_ENUM_ENTITIES
+*****************************
+
+Name
+====
+
+MEDIA_IOC_ENUM_ENTITIES - Enumerate entities and their properties
+
+Synopsis
+========
+
+.. c:macro:: MEDIA_IOC_ENUM_ENTITIES
+
+``int ioctl(int fd, MEDIA_IOC_ENUM_ENTITIES, struct media_entity_desc *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`media_entity_desc`.
+
+Description
+===========
+
+To query the attributes of an entity, applications set the id field of a
+struct :c:type:`media_entity_desc` structure and
+call the MEDIA_IOC_ENUM_ENTITIES ioctl with a pointer to this
+structure. The driver fills the rest of the structure or returns an
+EINVAL error code when the id is invalid.
+
+.. _media-ent-id-flag-next:
+
+Entities can be enumerated by or'ing the id with the
+``MEDIA_ENT_ID_FLAG_NEXT`` flag. The driver will return information
+about the entity with the smallest id strictly larger than the requested
+one ('next entity'), or the ``EINVAL`` error code if there is none.
+
+Entity IDs can be non-contiguous. Applications must *not* try to
+enumerate entities by calling MEDIA_IOC_ENUM_ENTITIES with increasing
+id's until they get an error.
+
+.. c:type:: media_entity_desc
+
+.. tabularcolumns:: |p{1.5cm}|p{1.7cm}|p{1.6cm}|p{1.5cm}|p{11.2cm}|
+
+.. flat-table:: struct media_entity_desc
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 2 2 1 8
+
+    *  -  __u32
+       -  ``id``
+       -
+       -  Entity ID, set by the application. When the ID is or'ed with
+	  ``MEDIA_ENT_ID_FLAG_NEXT``, the driver clears the flag and returns
+	  the first entity with a larger ID. Do not expect that the ID will
+	  always be the same for each instance of the device. In other words,
+	  do not hardcode entity IDs in an application.
+
+    *  -  char
+       -  ``name``\ [32]
+       -
+       -  Entity name as an UTF-8 NULL-terminated string. This name must be unique
+          within the media topology.
+
+    *  -  __u32
+       -  ``type``
+       -
+       -  Entity type, see :ref:`media-entity-functions` for details.
+
+    *  -  __u32
+       -  ``revision``
+       -
+       -  Entity revision. Always zero (obsolete)
+
+    *  -  __u32
+       -  ``flags``
+       -
+       -  Entity flags, see :ref:`media-entity-flag` for details.
+
+    *  -  __u32
+       -  ``group_id``
+       -
+       -  Entity group ID. Always zero (obsolete)
+
+    *  -  __u16
+       -  ``pads``
+       -
+       -  Number of pads
+
+    *  -  __u16
+       -  ``links``
+       -
+       -  Total number of outbound links. Inbound links are not counted in
+	  this field.
+
+    *  -  __u32
+       -  ``reserved[4]``
+       -
+       -  Reserved for future extensions. Drivers and applications must set
+          the array to zero.
+
+    *  -  union {
+       -  (anonymous)
+
+    *  -  struct
+       -  ``dev``
+       -
+       -  Valid for (sub-)devices that create a single device node.
+
+    *  -
+       -  __u32
+       -  ``major``
+       -  Device node major number.
+
+    *  -
+       -  __u32
+       -  ``minor``
+       -  Device node minor number.
+
+    *  -  __u8
+       -  ``raw``\ [184]
+       -
+       -
+    *  - }
+       -
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`media_entity_desc` ``id``
+    references a non-existing entity.
diff --git a/Documentation/userspace-api/media/mediactl/media-ioc-enum-links.rst b/Documentation/userspace-api/media/mediactl/media-ioc-enum-links.rst
new file mode 100644
index 000000000..3bc98a6a2
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-ioc-enum-links.rst
@@ -0,0 +1,145 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media_ioc_enum_links:
+
+**************************
+ioctl MEDIA_IOC_ENUM_LINKS
+**************************
+
+Name
+====
+
+MEDIA_IOC_ENUM_LINKS - Enumerate all pads and links for a given entity
+
+Synopsis
+========
+
+.. c:macro:: MEDIA_IOC_ENUM_LINKS
+
+``int ioctl(int fd, MEDIA_IOC_ENUM_LINKS, struct media_links_enum *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`media_links_enum`.
+
+Description
+===========
+
+To enumerate pads and/or links for a given entity, applications set the
+entity field of a struct :c:type:`media_links_enum`
+structure and initialize the struct
+:c:type:`media_pad_desc` and struct
+:c:type:`media_link_desc` structure arrays pointed by
+the ``pads`` and ``links`` fields. They then call the
+MEDIA_IOC_ENUM_LINKS ioctl with a pointer to this structure.
+
+If the ``pads`` field is not NULL, the driver fills the ``pads`` array
+with information about the entity's pads. The array must have enough
+room to store all the entity's pads. The number of pads can be retrieved
+with :ref:`MEDIA_IOC_ENUM_ENTITIES`.
+
+If the ``links`` field is not NULL, the driver fills the ``links`` array
+with information about the entity's outbound links. The array must have
+enough room to store all the entity's outbound links. The number of
+outbound links can be retrieved with :ref:`MEDIA_IOC_ENUM_ENTITIES`.
+
+Only forward links that originate at one of the entity's source pads are
+returned during the enumeration process.
+
+.. c:type:: media_links_enum
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct media_links_enum
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    *  -  __u32
+       -  ``entity``
+       -  Entity id, set by the application.
+
+    *  -  struct :c:type:`media_pad_desc`
+       -  \*\ ``pads``
+       -  Pointer to a pads array allocated by the application. Ignored if
+	  NULL.
+
+    *  -  struct :c:type:`media_link_desc`
+       -  \*\ ``links``
+       -  Pointer to a links array allocated by the application. Ignored if
+	  NULL.
+
+    *  -  __u32
+       -  ``reserved[4]``
+       -  Reserved for future extensions. Drivers and applications must set
+          the array to zero.
+
+.. c:type:: media_pad_desc
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct media_pad_desc
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    *  -  __u32
+       -  ``entity``
+       -  ID of the entity this pad belongs to.
+
+    *  -  __u16
+       -  ``index``
+       -  Pad index, starts at 0.
+
+    *  -  __u32
+       -  ``flags``
+       -  Pad flags, see :ref:`media-pad-flag` for more details.
+
+    *  -  __u32
+       -  ``reserved[2]``
+       -  Reserved for future extensions. Drivers and applications must set
+          the array to zero.
+
+
+.. c:type:: media_link_desc
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct media_link_desc
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    *  -  struct :c:type:`media_pad_desc`
+       -  ``source``
+       -  Pad at the origin of this link.
+
+    *  -  struct :c:type:`media_pad_desc`
+       -  ``sink``
+       -  Pad at the target of this link.
+
+    *  -  __u32
+       -  ``flags``
+       -  Link flags, see :ref:`media-link-flag` for more details.
+
+    *  -  __u32
+       -  ``reserved[2]``
+       -  Reserved for future extensions. Drivers and applications must set
+          the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`media_links_enum` ``id``
+    references a non-existing entity.
diff --git a/Documentation/userspace-api/media/mediactl/media-ioc-g-topology.rst b/Documentation/userspace-api/media/mediactl/media-ioc-g-topology.rst
new file mode 100644
index 000000000..8f8b3b586
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-ioc-g-topology.rst
@@ -0,0 +1,294 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media_ioc_g_topology:
+
+**************************
+ioctl MEDIA_IOC_G_TOPOLOGY
+**************************
+
+Name
+====
+
+MEDIA_IOC_G_TOPOLOGY - Enumerate the graph topology and graph element properties
+
+Synopsis
+========
+
+.. c:macro:: MEDIA_IOC_G_TOPOLOGY
+
+``int ioctl(int fd, MEDIA_IOC_G_TOPOLOGY, struct media_v2_topology *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`media_v2_topology`.
+
+Description
+===========
+
+The typical usage of this ioctl is to call it twice. On the first call,
+the structure defined at struct
+:c:type:`media_v2_topology` should be zeroed. At
+return, if no errors happen, this ioctl will return the
+``topology_version`` and the total number of entities, interfaces, pads
+and links.
+
+Before the second call, the userspace should allocate arrays to store
+the graph elements that are desired, putting the pointers to them at the
+ptr_entities, ptr_interfaces, ptr_links and/or ptr_pads, keeping the
+other values untouched.
+
+If the ``topology_version`` remains the same, the ioctl should fill the
+desired arrays with the media graph elements.
+
+.. tabularcolumns:: |p{1.6cm}|p{3.4cm}|p{12.5cm}|
+
+.. c:type:: media_v2_topology
+
+.. flat-table:: struct media_v2_topology
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 2 8
+
+    *  -  __u64
+       -  ``topology_version``
+       -  Version of the media graph topology. When the graph is created,
+	  this field starts with zero. Every time a graph element is added
+	  or removed, this field is incremented.
+
+    *  -  __u32
+       -  ``num_entities``
+       -  Number of entities in the graph
+
+    *  -  __u32
+       -  ``reserved1``
+       -  Applications and drivers shall set this to 0.
+
+    *  -  __u64
+       -  ``ptr_entities``
+       -  A pointer to a memory area where the entities array will be
+	  stored, converted to a 64-bits integer. It can be zero. if zero,
+	  the ioctl won't store the entities. It will just update
+	  ``num_entities``
+
+    *  -  __u32
+       -  ``num_interfaces``
+       -  Number of interfaces in the graph
+
+    *  -  __u32
+       -  ``reserved2``
+       -  Applications and drivers shall set this to 0.
+
+    *  -  __u64
+       -  ``ptr_interfaces``
+       -  A pointer to a memory area where the interfaces array will be
+	  stored, converted to a 64-bits integer. It can be zero. if zero,
+	  the ioctl won't store the interfaces. It will just update
+	  ``num_interfaces``
+
+    *  -  __u32
+       -  ``num_pads``
+       -  Total number of pads in the graph
+
+    *  -  __u32
+       -  ``reserved3``
+       -  Applications and drivers shall set this to 0.
+
+    *  -  __u64
+       -  ``ptr_pads``
+       -  A pointer to a memory area where the pads array will be stored,
+	  converted to a 64-bits integer. It can be zero. if zero, the ioctl
+	  won't store the pads. It will just update ``num_pads``
+
+    *  -  __u32
+       -  ``num_links``
+       -  Total number of data and interface links in the graph
+
+    *  -  __u32
+       -  ``reserved4``
+       -  Applications and drivers shall set this to 0.
+
+    *  -  __u64
+       -  ``ptr_links``
+       -  A pointer to a memory area where the links array will be stored,
+	  converted to a 64-bits integer. It can be zero. if zero, the ioctl
+	  won't store the links. It will just update ``num_links``
+
+.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}|
+
+.. c:type:: media_v2_entity
+
+.. flat-table:: struct media_v2_entity
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 2 8
+
+    *  -  __u32
+       -  ``id``
+       -  Unique ID for the entity. Do not expect that the ID will
+	  always be the same for each instance of the device. In other words,
+	  do not hardcode entity IDs in an application.
+
+    *  -  char
+       -  ``name``\ [64]
+       -  Entity name as an UTF-8 NULL-terminated string. This name must be unique
+          within the media topology.
+
+    *  -  __u32
+       -  ``function``
+       -  Entity main function, see :ref:`media-entity-functions` for details.
+
+    *  -  __u32
+       -  ``flags``
+       -  Entity flags, see :ref:`media-entity-flag` for details.
+	  Only valid if ``MEDIA_V2_ENTITY_HAS_FLAGS(media_version)``
+	  returns true. The ``media_version`` is defined in struct
+	  :c:type:`media_device_info` and can be retrieved using
+	  :ref:`MEDIA_IOC_DEVICE_INFO`.
+
+    *  -  __u32
+       -  ``reserved``\ [5]
+       -  Reserved for future extensions. Drivers and applications must set
+	  this array to zero.
+
+.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}|
+
+.. c:type:: media_v2_interface
+
+.. flat-table:: struct media_v2_interface
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 2 8
+
+    *  -  __u32
+       -  ``id``
+       -  Unique ID for the interface. Do not expect that the ID will
+	  always be the same for each instance of the device. In other words,
+	  do not hardcode interface IDs in an application.
+
+    *  -  __u32
+       -  ``intf_type``
+       -  Interface type, see :ref:`media-intf-type` for details.
+
+    *  -  __u32
+       -  ``flags``
+       -  Interface flags. Currently unused.
+
+    *  -  __u32
+       -  ``reserved``\ [9]
+       -  Reserved for future extensions. Drivers and applications must set
+	  this array to zero.
+
+    *  -  struct media_v2_intf_devnode
+       -  ``devnode``
+       -  Used only for device node interfaces. See
+	  :c:type:`media_v2_intf_devnode` for details.
+
+.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}|
+
+.. c:type:: media_v2_intf_devnode
+
+.. flat-table:: struct media_v2_intf_devnode
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 2 8
+
+    *  -  __u32
+       -  ``major``
+       -  Device node major number.
+
+    *  -  __u32
+       -  ``minor``
+       -  Device node minor number.
+
+.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}|
+
+.. c:type:: media_v2_pad
+
+.. flat-table:: struct media_v2_pad
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 2 8
+
+    *  -  __u32
+       -  ``id``
+       -  Unique ID for the pad. Do not expect that the ID will
+	  always be the same for each instance of the device. In other words,
+	  do not hardcode pad IDs in an application.
+
+    *  -  __u32
+       -  ``entity_id``
+       -  Unique ID for the entity where this pad belongs.
+
+    *  -  __u32
+       -  ``flags``
+       -  Pad flags, see :ref:`media-pad-flag` for more details.
+
+    *  -  __u32
+       -  ``index``
+       -  Pad index, starts at 0. Only valid if ``MEDIA_V2_PAD_HAS_INDEX(media_version)``
+	  returns true. The ``media_version`` is defined in struct
+	  :c:type:`media_device_info` and can be retrieved using
+	  :ref:`MEDIA_IOC_DEVICE_INFO`.
+
+    *  -  __u32
+       -  ``reserved``\ [4]
+       -  Reserved for future extensions. Drivers and applications must set
+	  this array to zero.
+
+.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}|
+
+.. c:type:: media_v2_link
+
+.. flat-table:: struct media_v2_link
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 2 8
+
+    *  -  __u32
+       -  ``id``
+       -  Unique ID for the link. Do not expect that the ID will
+	  always be the same for each instance of the device. In other words,
+	  do not hardcode link IDs in an application.
+
+    *  -  __u32
+       -  ``source_id``
+       -  On pad to pad links: unique ID for the source pad.
+
+	  On interface to entity links: unique ID for the interface.
+
+    *  -  __u32
+       -  ``sink_id``
+       -  On pad to pad links: unique ID for the sink pad.
+
+	  On interface to entity links: unique ID for the entity.
+
+    *  -  __u32
+       -  ``flags``
+       -  Link flags, see :ref:`media-link-flag` for more details.
+
+    *  -  __u32
+       -  ``reserved``\ [6]
+       -  Reserved for future extensions. Drivers and applications must set
+	  this array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+ENOSPC
+    This is returned when either one or more of the num_entities,
+    num_interfaces, num_links or num_pads are non-zero and are
+    smaller than the actual number of elements inside the graph. This
+    may happen if the ``topology_version`` changed when compared to the
+    last time this ioctl was called. Userspace should usually free the
+    area for the pointers, zero the struct elements and call this ioctl
+    again.
diff --git a/Documentation/userspace-api/media/mediactl/media-ioc-request-alloc.rst b/Documentation/userspace-api/media/mediactl/media-ioc-request-alloc.rst
new file mode 100644
index 000000000..9195b4b8b
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-ioc-request-alloc.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media_ioc_request_alloc:
+
+*****************************
+ioctl MEDIA_IOC_REQUEST_ALLOC
+*****************************
+
+Name
+====
+
+MEDIA_IOC_REQUEST_ALLOC - Allocate a request
+
+Synopsis
+========
+
+.. c:macro:: MEDIA_IOC_REQUEST_ALLOC
+
+``int ioctl(int fd, MEDIA_IOC_REQUEST_ALLOC, int *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to an integer.
+
+Description
+===========
+
+If the media device supports :ref:`requests <media-request-api>`, then
+this ioctl can be used to allocate a request. If it is not supported, then
+``errno`` is set to ``ENOTTY``. A request is accessed through a file descriptor
+that is returned in ``*argp``.
+
+If the request was successfully allocated, then the request file descriptor
+can be passed to the :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`,
+:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`,
+:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and
+:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctls.
+
+In addition, the request can be queued by calling
+:ref:`MEDIA_REQUEST_IOC_QUEUE` and re-initialized by calling
+:ref:`MEDIA_REQUEST_IOC_REINIT`.
+
+Finally, the file descriptor can be :ref:`polled <request-func-poll>` to wait
+for the request to complete.
+
+The request will remain allocated until all the file descriptors associated
+with it are closed by :c:func:`close()` and the driver no
+longer uses the request internally. See also
+:ref:`here <media-request-life-time>` for more information.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+ENOTTY
+    The driver has no support for requests.
diff --git a/Documentation/userspace-api/media/mediactl/media-ioc-setup-link.rst b/Documentation/userspace-api/media/mediactl/media-ioc-setup-link.rst
new file mode 100644
index 000000000..23208300c
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-ioc-setup-link.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media_ioc_setup_link:
+
+**************************
+ioctl MEDIA_IOC_SETUP_LINK
+**************************
+
+Name
+====
+
+MEDIA_IOC_SETUP_LINK - Modify the properties of a link
+
+Synopsis
+========
+
+.. c:macro:: MEDIA_IOC_SETUP_LINK
+
+``int ioctl(int fd, MEDIA_IOC_SETUP_LINK, struct media_link_desc *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`media_link_desc`.
+
+Description
+===========
+
+To change link properties applications fill a struct
+:c:type:`media_link_desc` with link identification
+information (source and sink pad) and the new requested link flags. They
+then call the MEDIA_IOC_SETUP_LINK ioctl with a pointer to that
+structure.
+
+The only configurable property is the ``ENABLED`` link flag to
+enable/disable a link. Links marked with the ``IMMUTABLE`` link flag can
+not be enabled or disabled.
+
+Link configuration has no side effect on other links. If an enabled link
+at the sink pad prevents the link from being enabled, the driver returns
+with an ``EBUSY`` error code.
+
+Only links marked with the ``DYNAMIC`` link flag can be enabled/disabled
+while streaming media data. Attempting to enable or disable a streaming
+non-dynamic link will return an ``EBUSY`` error code.
+
+If the specified link can't be found the driver returns with an ``EINVAL``
+error code.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`media_link_desc` references a
+    non-existing link, or the link is immutable and an attempt to modify
+    its configuration was made.
diff --git a/Documentation/userspace-api/media/mediactl/media-request-ioc-queue.rst b/Documentation/userspace-api/media/mediactl/media-request-ioc-queue.rst
new file mode 100644
index 000000000..04b33db2b
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-request-ioc-queue.rst
@@ -0,0 +1,77 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media_request_ioc_queue:
+
+*****************************
+ioctl MEDIA_REQUEST_IOC_QUEUE
+*****************************
+
+Name
+====
+
+MEDIA_REQUEST_IOC_QUEUE - Queue a request
+
+Synopsis
+========
+
+.. c:macro:: MEDIA_REQUEST_IOC_QUEUE
+
+``int ioctl(int request_fd, MEDIA_REQUEST_IOC_QUEUE)``
+
+Arguments
+=========
+
+``request_fd``
+    File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`.
+
+Description
+===========
+
+If the media device supports :ref:`requests <media-request-api>`, then
+this request ioctl can be used to queue a previously allocated request.
+
+If the request was successfully queued, then the file descriptor can be
+:ref:`polled <request-func-poll>` to wait for the request to complete.
+
+If the request was already queued before, then ``EBUSY`` is returned.
+Other errors can be returned if the contents of the request contained
+invalid or inconsistent data, see the next section for a list of
+common error codes. On error both the request and driver state are unchanged.
+
+Once a request is queued, then the driver is required to gracefully handle
+errors that occur when the request is applied to the hardware. The
+exception is the ``EIO`` error which signals a fatal error that requires
+the application to stop streaming to reset the hardware state.
+
+It is not allowed to mix queuing requests with queuing buffers directly
+(without a request). ``EBUSY`` will be returned if the first buffer was
+queued directly and you next try to queue a request, or vice versa.
+
+A request must contain at least one buffer, otherwise this ioctl will
+return an ``ENOENT`` error.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EBUSY
+    The request was already queued or the application queued the first
+    buffer directly, but later attempted to use a request. It is not permitted
+    to mix the two APIs.
+ENOENT
+    The request did not contain any buffers. All requests are required
+    to have at least one buffer. This can also be returned if some required
+    configuration is missing in the request.
+ENOMEM
+    Out of memory when allocating internal data structures for this
+    request.
+EINVAL
+    The request has invalid data.
+EIO
+    The hardware is in a bad state. To recover, the application needs to
+    stop streaming to reset the hardware state and then try to restart
+    streaming.
diff --git a/Documentation/userspace-api/media/mediactl/media-request-ioc-reinit.rst b/Documentation/userspace-api/media/mediactl/media-request-ioc-reinit.rst
new file mode 100644
index 000000000..57567b87b
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-request-ioc-reinit.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media_request_ioc_reinit:
+
+******************************
+ioctl MEDIA_REQUEST_IOC_REINIT
+******************************
+
+Name
+====
+
+MEDIA_REQUEST_IOC_REINIT - Re-initialize a request
+
+Synopsis
+========
+
+.. c:macro:: MEDIA_REQUEST_IOC_REINIT
+
+``int ioctl(int request_fd, MEDIA_REQUEST_IOC_REINIT)``
+
+Arguments
+=========
+
+``request_fd``
+    File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`.
+
+Description
+===========
+
+If the media device supports :ref:`requests <media-request-api>`, then
+this request ioctl can be used to re-initialize a previously allocated
+request.
+
+Re-initializing a request will clear any existing data from the request.
+This avoids having to :c:func:`close()` a completed
+request and allocate a new request. Instead the completed request can just
+be re-initialized and it is ready to be used again.
+
+A request can only be re-initialized if it either has not been queued
+yet, or if it was queued and completed. Otherwise it will set ``errno``
+to ``EBUSY``. No other error codes can be returned.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately.
+
+EBUSY
+    The request is queued but not yet completed.
diff --git a/Documentation/userspace-api/media/mediactl/media-types.rst b/Documentation/userspace-api/media/mediactl/media-types.rst
new file mode 100644
index 000000000..7b24a213c
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/media-types.rst
@@ -0,0 +1,418 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _media-controller-types:
+
+Types and flags used to represent the media graph elements
+==========================================================
+
+..  tabularcolumns:: |p{8.2cm}|p{10.3cm}|
+
+.. _media-entity-functions:
+.. _MEDIA-ENT-F-UNKNOWN:
+.. _MEDIA-ENT-F-V4L2-SUBDEV-UNKNOWN:
+.. _MEDIA-ENT-F-IO-V4L:
+.. _MEDIA-ENT-F-IO-VBI:
+.. _MEDIA-ENT-F-IO-SWRADIO:
+.. _MEDIA-ENT-F-IO-DTV:
+.. _MEDIA-ENT-F-DTV-DEMOD:
+.. _MEDIA-ENT-F-TS-DEMUX:
+.. _MEDIA-ENT-F-DTV-CA:
+.. _MEDIA-ENT-F-DTV-NET-DECAP:
+.. _MEDIA-ENT-F-CONN-RF:
+.. _MEDIA-ENT-F-CONN-SVIDEO:
+.. _MEDIA-ENT-F-CONN-COMPOSITE:
+.. _MEDIA-ENT-F-CAM-SENSOR:
+.. _MEDIA-ENT-F-FLASH:
+.. _MEDIA-ENT-F-LENS:
+.. _MEDIA-ENT-F-ATV-DECODER:
+.. _MEDIA-ENT-F-TUNER:
+.. _MEDIA-ENT-F-IF-VID-DECODER:
+.. _MEDIA-ENT-F-IF-AUD-DECODER:
+.. _MEDIA-ENT-F-AUDIO-CAPTURE:
+.. _MEDIA-ENT-F-AUDIO-PLAYBACK:
+.. _MEDIA-ENT-F-AUDIO-MIXER:
+.. _MEDIA-ENT-F-PROC-VIDEO-COMPOSER:
+.. _MEDIA-ENT-F-PROC-VIDEO-PIXEL-FORMATTER:
+.. _MEDIA-ENT-F-PROC-VIDEO-PIXEL-ENC-CONV:
+.. _MEDIA-ENT-F-PROC-VIDEO-LUT:
+.. _MEDIA-ENT-F-PROC-VIDEO-SCALER:
+.. _MEDIA-ENT-F-PROC-VIDEO-STATISTICS:
+.. _MEDIA-ENT-F-PROC-VIDEO-ENCODER:
+.. _MEDIA-ENT-F-PROC-VIDEO-DECODER:
+.. _MEDIA-ENT-F-VID-MUX:
+.. _MEDIA-ENT-F-VID-IF-BRIDGE:
+.. _MEDIA-ENT-F-DV-DECODER:
+.. _MEDIA-ENT-F-DV-ENCODER:
+
+.. cssclass:: longtable
+
+.. flat-table:: Media entity functions
+    :header-rows:  0
+    :stub-columns: 0
+
+    *  -  ``MEDIA_ENT_F_UNKNOWN`` and
+	  ``MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN``
+       -  Unknown entity. That generally indicates that a driver didn't
+	  initialize properly the entity, which is a Kernel bug
+
+    *  -  ``MEDIA_ENT_F_IO_V4L``
+       -  Data streaming input and/or output entity.
+
+    *  -  ``MEDIA_ENT_F_IO_VBI``
+       -  V4L VBI streaming input or output entity
+
+    *  -  ``MEDIA_ENT_F_IO_SWRADIO``
+       -  V4L Software Digital Radio (SDR) streaming input or output entity
+
+    *  -  ``MEDIA_ENT_F_IO_DTV``
+       -  DVB Digital TV streaming input or output entity
+
+    *  -  ``MEDIA_ENT_F_DTV_DEMOD``
+       -  Digital TV demodulator entity.
+
+    *  -  ``MEDIA_ENT_F_TS_DEMUX``
+       -  MPEG Transport stream demux entity. Could be implemented on
+	  hardware or in Kernelspace by the Linux DVB subsystem.
+
+    *  -  ``MEDIA_ENT_F_DTV_CA``
+       -  Digital TV Conditional Access module (CAM) entity
+
+    *  -  ``MEDIA_ENT_F_DTV_NET_DECAP``
+       -  Digital TV network ULE/MLE desencapsulation entity. Could be
+	  implemented on hardware or in Kernelspace
+
+    *  -  ``MEDIA_ENT_F_CONN_RF``
+       -  Connector for a Radio Frequency (RF) signal.
+
+    *  -  ``MEDIA_ENT_F_CONN_SVIDEO``
+       -  Connector for a S-Video signal.
+
+    *  -  ``MEDIA_ENT_F_CONN_COMPOSITE``
+       -  Connector for a RGB composite signal.
+
+    *  -  ``MEDIA_ENT_F_CAM_SENSOR``
+       -  Camera video sensor entity.
+
+    *  -  ``MEDIA_ENT_F_FLASH``
+       -  Flash controller entity.
+
+    *  -  ``MEDIA_ENT_F_LENS``
+       -  Lens controller entity.
+
+    *  -  ``MEDIA_ENT_F_ATV_DECODER``
+       -  Analog video decoder, the basic function of the video decoder is
+	  to accept analogue video from a wide variety of sources such as
+	  broadcast, DVD players, cameras and video cassette recorders, in
+	  either NTSC, PAL, SECAM or HD format, separating the stream into
+	  its component parts, luminance and chrominance, and output it in
+	  some digital video standard, with appropriate timing signals.
+
+    *  -  ``MEDIA_ENT_F_TUNER``
+       -  Digital TV, analog TV, radio and/or software radio tuner, with
+	  consists on a PLL tuning stage that converts radio frequency (RF)
+	  signal into an Intermediate Frequency (IF). Modern tuners have
+	  internally IF-PLL decoders for audio and video, but older models
+	  have those stages implemented on separate entities.
+
+    *  -  ``MEDIA_ENT_F_IF_VID_DECODER``
+       -  IF-PLL video decoder. It receives the IF from a PLL and decodes
+	  the analog TV video signal. This is commonly found on some very
+	  old analog tuners, like Philips MK3 designs. They all contain a
+	  tda9887 (or some software compatible similar chip, like tda9885).
+	  Those devices use a different I2C address than the tuner PLL.
+
+    *  -  ``MEDIA_ENT_F_IF_AUD_DECODER``
+       -  IF-PLL sound decoder. It receives the IF from a PLL and decodes
+	  the analog TV audio signal. This is commonly found on some very
+	  old analog hardware, like Micronas msp3400, Philips tda9840,
+	  tda985x, etc. Those devices use a different I2C address than the
+	  tuner PLL and should be controlled together with the IF-PLL video
+	  decoder.
+
+    *  -  ``MEDIA_ENT_F_AUDIO_CAPTURE``
+       -  Audio Capture Function Entity.
+
+    *  -  ``MEDIA_ENT_F_AUDIO_PLAYBACK``
+       -  Audio Playback Function Entity.
+
+    *  -  ``MEDIA_ENT_F_AUDIO_MIXER``
+       -  Audio Mixer Function Entity.
+
+    *  -  ``MEDIA_ENT_F_PROC_VIDEO_COMPOSER``
+       -  Video composer (blender). An entity capable of video
+	  composing must have at least two sink pads and one source
+	  pad, and composes input video frames onto output video
+	  frames. Composition can be performed using alpha blending,
+	  color keying, raster operations (ROP), stitching or any other
+	  means.
+
+    *  -  ``MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER``
+       -  Video pixel formatter. An entity capable of pixel formatting
+	  must have at least one sink pad and one source pad. Read
+	  pixel formatters read pixels from memory and perform a subset
+	  of unpacking, cropping, color keying, alpha multiplication
+	  and pixel encoding conversion. Write pixel formatters perform
+	  a subset of dithering, pixel encoding conversion and packing
+	  and write pixels to memory.
+
+    *  -  ``MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV``
+       -  Video pixel encoding converter. An entity capable of pixel
+	  encoding conversion must have at least one sink pad and one
+	  source pad, and convert the encoding of pixels received on
+	  its sink pad(s) to a different encoding output on its source
+	  pad(s). Pixel encoding conversion includes but isn't limited
+	  to RGB to/from HSV, RGB to/from YUV and CFA (Bayer) to RGB
+	  conversions.
+
+    *  -  ``MEDIA_ENT_F_PROC_VIDEO_LUT``
+       -  Video look-up table. An entity capable of video lookup table
+	  processing must have one sink pad and one source pad. It uses
+	  the values of the pixels received on its sink pad to look up
+	  entries in internal tables and output them on its source pad.
+	  The lookup processing can be performed on all components
+	  separately or combine them for multi-dimensional table
+	  lookups.
+
+    *  -  ``MEDIA_ENT_F_PROC_VIDEO_SCALER``
+       -  Video scaler. An entity capable of video scaling must have
+	  at least one sink pad and one source pad, and scale the
+	  video frame(s) received on its sink pad(s) to a different
+	  resolution output on its source pad(s). The range of
+	  supported scaling ratios is entity-specific and can differ
+	  between the horizontal and vertical directions (in particular
+	  scaling can be supported in one direction only). Binning and
+	  sub-sampling (occasionally also referred to as skipping) are
+	  considered as scaling.
+
+    *  -  ``MEDIA_ENT_F_PROC_VIDEO_STATISTICS``
+       -  Video statistics computation (histogram, 3A, etc.). An entity
+	  capable of statistics computation must have one sink pad and
+	  one source pad. It computes statistics over the frames
+	  received on its sink pad and outputs the statistics data on
+	  its source pad.
+
+    *  -  ``MEDIA_ENT_F_PROC_VIDEO_ENCODER``
+       -  Video (MPEG, HEVC, VPx, etc.) encoder. An entity capable of
+          compressing video frames. Must have one sink pad and at least
+	  one source pad.
+
+    *  -  ``MEDIA_ENT_F_PROC_VIDEO_DECODER``
+       -  Video (MPEG, HEVC, VPx, etc.) decoder. An entity capable of
+          decompressing a compressed video stream into uncompressed video
+	  frames. Must have one sink pad and at least one source pad.
+
+    *  -  ``MEDIA_ENT_F_VID_MUX``
+       - Video multiplexer. An entity capable of multiplexing must have at
+         least two sink pads and one source pad, and must pass the video
+         frame(s) received from the active sink pad to the source pad.
+
+    *  -  ``MEDIA_ENT_F_VID_IF_BRIDGE``
+       - Video interface bridge. A video interface bridge entity must have at
+         least one sink pad and at least one source pad. It receives video
+         frames on its sink pad from an input video bus of one type (HDMI, eDP,
+         MIPI CSI-2, etc.), and outputs them on its source pad to an output
+         video bus of another type (eDP, MIPI CSI-2, parallel, etc.).
+
+    *  -  ``MEDIA_ENT_F_DV_DECODER``
+       -  Digital video decoder. The basic function of the video decoder is
+	  to accept digital video from a wide variety of sources
+	  and output it in some digital video standard, with appropriate
+	  timing signals.
+
+    *  -  ``MEDIA_ENT_F_DV_ENCODER``
+       -  Digital video encoder. The basic function of the video encoder is
+	  to accept digital video from some digital video standard with
+	  appropriate timing signals (usually a parallel video bus with sync
+	  signals) and output this to a digital video output connector such
+	  as HDMI or DisplayPort.
+
+..  tabularcolumns:: |p{5.5cm}|p{12.0cm}|
+
+.. _media-entity-flag:
+.. _MEDIA-ENT-FL-DEFAULT:
+.. _MEDIA-ENT-FL-CONNECTOR:
+
+.. flat-table:: Media entity flags
+    :header-rows:  0
+    :stub-columns: 0
+
+    *  -  ``MEDIA_ENT_FL_DEFAULT``
+       -  Default entity for its type. Used to discover the default audio,
+	  VBI and video devices, the default camera sensor, etc.
+
+    *  -  ``MEDIA_ENT_FL_CONNECTOR``
+       -  The entity represents a connector.
+
+
+..  tabularcolumns:: |p{6.5cm}|p{6.0cm}|p{5.0cm}|
+
+.. _media-intf-type:
+.. _MEDIA-INTF-T-DVB-FE:
+.. _MEDIA-INTF-T-DVB-DEMUX:
+.. _MEDIA-INTF-T-DVB-DVR:
+.. _MEDIA-INTF-T-DVB-CA:
+.. _MEDIA-INTF-T-DVB-NET:
+.. _MEDIA-INTF-T-V4L-VIDEO:
+.. _MEDIA-INTF-T-V4L-VBI:
+.. _MEDIA-INTF-T-V4L-RADIO:
+.. _MEDIA-INTF-T-V4L-SUBDEV:
+.. _MEDIA-INTF-T-V4L-SWRADIO:
+.. _MEDIA-INTF-T-V4L-TOUCH:
+.. _MEDIA-INTF-T-ALSA-PCM-CAPTURE:
+.. _MEDIA-INTF-T-ALSA-PCM-PLAYBACK:
+.. _MEDIA-INTF-T-ALSA-CONTROL:
+.. _MEDIA-INTF-T-ALSA-COMPRESS:
+.. _MEDIA-INTF-T-ALSA-RAWMIDI:
+.. _MEDIA-INTF-T-ALSA-HWDEP:
+.. _MEDIA-INTF-T-ALSA-SEQUENCER:
+.. _MEDIA-INTF-T-ALSA-TIMER:
+
+.. flat-table:: Media interface types
+    :header-rows:  0
+    :stub-columns: 0
+
+    *  -  ``MEDIA_INTF_T_DVB_FE``
+       -  Device node interface for the Digital TV frontend
+       -  typically, /dev/dvb/adapter?/frontend?
+
+    *  -  ``MEDIA_INTF_T_DVB_DEMUX``
+       -  Device node interface for the Digital TV demux
+       -  typically, /dev/dvb/adapter?/demux?
+
+    *  -  ``MEDIA_INTF_T_DVB_DVR``
+       -  Device node interface for the Digital TV DVR
+       -  typically, /dev/dvb/adapter?/dvr?
+
+    *  -  ``MEDIA_INTF_T_DVB_CA``
+       -  Device node interface for the Digital TV Conditional Access
+       -  typically, /dev/dvb/adapter?/ca?
+
+    *  -  ``MEDIA_INTF_T_DVB_NET``
+       -  Device node interface for the Digital TV network control
+       -  typically, /dev/dvb/adapter?/net?
+
+    *  -  ``MEDIA_INTF_T_V4L_VIDEO``
+       -  Device node interface for video (V4L)
+       -  typically, /dev/video?
+
+    *  -  ``MEDIA_INTF_T_V4L_VBI``
+       -  Device node interface for VBI (V4L)
+       -  typically, /dev/vbi?
+
+    *  -  ``MEDIA_INTF_T_V4L_RADIO``
+       -  Device node interface for radio (V4L)
+       -  typically, /dev/radio?
+
+    *  -  ``MEDIA_INTF_T_V4L_SUBDEV``
+       -  Device node interface for a V4L subdevice
+       -  typically, /dev/v4l-subdev?
+
+    *  -  ``MEDIA_INTF_T_V4L_SWRADIO``
+       -  Device node interface for Software Defined Radio (V4L)
+       -  typically, /dev/swradio?
+
+    *  -  ``MEDIA_INTF_T_V4L_TOUCH``
+       -  Device node interface for Touch device (V4L)
+       -  typically, /dev/v4l-touch?
+
+    *  -  ``MEDIA_INTF_T_ALSA_PCM_CAPTURE``
+       -  Device node interface for ALSA PCM Capture
+       -  typically, /dev/snd/pcmC?D?c
+
+    *  -  ``MEDIA_INTF_T_ALSA_PCM_PLAYBACK``
+       -  Device node interface for ALSA PCM Playback
+       -  typically, /dev/snd/pcmC?D?p
+
+    *  -  ``MEDIA_INTF_T_ALSA_CONTROL``
+       -  Device node interface for ALSA Control
+       -  typically, /dev/snd/controlC?
+
+    *  -  ``MEDIA_INTF_T_ALSA_COMPRESS``
+       -  Device node interface for ALSA Compress
+       -  typically, /dev/snd/compr?
+
+    *  -  ``MEDIA_INTF_T_ALSA_RAWMIDI``
+       -  Device node interface for ALSA Raw MIDI
+       -  typically, /dev/snd/midi?
+
+    *  -  ``MEDIA_INTF_T_ALSA_HWDEP``
+       -  Device node interface for ALSA Hardware Dependent
+       -  typically, /dev/snd/hwC?D?
+
+    *  -  ``MEDIA_INTF_T_ALSA_SEQUENCER``
+       -  Device node interface for ALSA Sequencer
+       -  typically, /dev/snd/seq
+
+    *  -  ``MEDIA_INTF_T_ALSA_TIMER``
+       -  Device node interface for ALSA Timer
+       -  typically, /dev/snd/timer
+
+
+.. tabularcolumns:: |p{5.5cm}|p{12.0cm}|
+
+.. _media-pad-flag:
+.. _MEDIA-PAD-FL-SINK:
+.. _MEDIA-PAD-FL-SOURCE:
+.. _MEDIA-PAD-FL-MUST-CONNECT:
+
+.. flat-table:: Media pad flags
+    :header-rows:  0
+    :stub-columns: 0
+
+    *  -  ``MEDIA_PAD_FL_SINK``
+       -  Input pad, relative to the entity. Input pads sink data and are
+	  targets of links.
+
+    *  -  ``MEDIA_PAD_FL_SOURCE``
+       -  Output pad, relative to the entity. Output pads source data and
+	  are origins of links.
+
+    *  -  ``MEDIA_PAD_FL_MUST_CONNECT``
+       -  If this flag is set and the pad is linked to any other pad, then
+	  at least one of those links must be enabled for the entity to be
+	  able to stream. There could be temporary reasons (e.g. device
+	  configuration dependent) for the pad to need enabled links even
+	  when this flag isn't set; the absence of the flag doesn't imply
+	  there is none.
+
+
+One and only one of ``MEDIA_PAD_FL_SINK`` and ``MEDIA_PAD_FL_SOURCE``
+must be set for every pad.
+
+.. tabularcolumns:: |p{5.5cm}|p{12.0cm}|
+
+.. _media-link-flag:
+.. _MEDIA-LNK-FL-ENABLED:
+.. _MEDIA-LNK-FL-IMMUTABLE:
+.. _MEDIA-LNK-FL-DYNAMIC:
+.. _MEDIA-LNK-FL-LINK-TYPE:
+
+.. flat-table:: Media link flags
+    :header-rows:  0
+    :stub-columns: 0
+
+    *  -  ``MEDIA_LNK_FL_ENABLED``
+       -  The link is enabled and can be used to transfer media data. When
+	  two or more links target a sink pad, only one of them can be
+	  enabled at a time.
+
+    *  -  ``MEDIA_LNK_FL_IMMUTABLE``
+       -  The link enabled state can't be modified at runtime. An immutable
+	  link is always enabled.
+
+    *  -  ``MEDIA_LNK_FL_DYNAMIC``
+       -  The link enabled state can be modified during streaming. This flag
+	  is set by drivers and is read-only for applications.
+
+    *  -  ``MEDIA_LNK_FL_LINK_TYPE``
+       -  This is a bitmask that defines the type of the link. Currently,
+	  two types of links are supported:
+
+	  .. _MEDIA-LNK-FL-DATA-LINK:
+
+	  ``MEDIA_LNK_FL_DATA_LINK`` if the link is between two pads
+
+	  .. _MEDIA-LNK-FL-INTERFACE-LINK:
+
+	  ``MEDIA_LNK_FL_INTERFACE_LINK`` if the link is between an
+	  interface and an entity
diff --git a/Documentation/userspace-api/media/mediactl/request-api.rst b/Documentation/userspace-api/media/mediactl/request-api.rst
new file mode 100644
index 000000000..6c4cbd9f0
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/request-api.rst
@@ -0,0 +1,253 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _media-request-api:
+
+Request API
+===========
+
+The Request API has been designed to allow V4L2 to deal with requirements of
+modern devices (stateless codecs, complex camera pipelines, ...) and APIs
+(Android Codec v2). One such requirement is the ability for devices belonging to
+the same pipeline to reconfigure and collaborate closely on a per-frame basis.
+Another is support of stateless codecs, which require controls to be applied
+to specific frames (aka 'per-frame controls') in order to be used efficiently.
+
+While the initial use-case was V4L2, it can be extended to other subsystems
+as well, as long as they use the media controller.
+
+Supporting these features without the Request API is not always possible and if
+it is, it is terribly inefficient: user-space would have to flush all activity
+on the media pipeline, reconfigure it for the next frame, queue the buffers to
+be processed with that configuration, and wait until they are all available for
+dequeuing before considering the next frame. This defeats the purpose of having
+buffer queues since in practice only one buffer would be queued at a time.
+
+The Request API allows a specific configuration of the pipeline (media
+controller topology + configuration for each media entity) to be associated with
+specific buffers. This allows user-space to schedule several tasks ("requests")
+with different configurations in advance, knowing that the configuration will be
+applied when needed to get the expected result. Configuration values at the time
+of request completion are also available for reading.
+
+General Usage
+-------------
+
+The Request API extends the Media Controller API and cooperates with
+subsystem-specific APIs to support request usage. At the Media Controller
+level, requests are allocated from the supporting Media Controller device
+node. Their life cycle is then managed through the request file descriptors in
+an opaque way. Configuration data, buffer handles and processing results
+stored in requests are accessed through subsystem-specific APIs extended for
+request support, such as V4L2 APIs that take an explicit ``request_fd``
+parameter.
+
+Request Allocation
+------------------
+
+User-space allocates requests using :ref:`MEDIA_IOC_REQUEST_ALLOC`
+for the media device node. This returns a file descriptor representing the
+request. Typically, several such requests will be allocated.
+
+Request Preparation
+-------------------
+
+Standard V4L2 ioctls can then receive a request file descriptor to express the
+fact that the ioctl is part of said request, and is not to be applied
+immediately. See :ref:`MEDIA_IOC_REQUEST_ALLOC` for a list of ioctls that
+support this. Configurations set with a ``request_fd`` parameter are stored
+instead of being immediately applied, and buffers queued to a request do not
+enter the regular buffer queue until the request itself is queued.
+
+Request Submission
+------------------
+
+Once the configuration and buffers of the request are specified, it can be
+queued by calling :ref:`MEDIA_REQUEST_IOC_QUEUE` on the request file descriptor.
+A request must contain at least one buffer, otherwise ``ENOENT`` is returned.
+A queued request cannot be modified anymore.
+
+.. caution::
+   For :ref:`memory-to-memory devices <mem2mem>` you can use requests only for
+   output buffers, not for capture buffers. Attempting to add a capture buffer
+   to a request will result in an ``EBADR`` error.
+
+If the request contains configurations for multiple entities, individual drivers
+may synchronize so the requested pipeline's topology is applied before the
+buffers are processed. Media controller drivers do a best effort implementation
+since perfect atomicity may not be possible due to hardware limitations.
+
+.. caution::
+
+   It is not allowed to mix queuing requests with directly queuing buffers:
+   whichever method is used first locks this in place until
+   :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` is called or the device is
+   :ref:`closed <func-close>`. Attempts to directly queue a buffer when earlier
+   a buffer was queued via a request or vice versa will result in an ``EBUSY``
+   error.
+
+Controls can still be set without a request and are applied immediately,
+regardless of whether a request is in use or not.
+
+.. caution::
+
+   Setting the same control through a request and also directly can lead to
+   undefined behavior!
+
+User-space can :c:func:`poll()` a request file descriptor in
+order to wait until the request completes. A request is considered complete
+once all its associated buffers are available for dequeuing and all the
+associated controls have been updated with the values at the time of completion.
+Note that user-space does not need to wait for the request to complete to
+dequeue its buffers: buffers that are available halfway through a request can
+be dequeued independently of the request's state.
+
+A completed request contains the state of the device after the request was
+executed. User-space can query that state by calling
+:ref:`ioctl VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` with the request file
+descriptor. Calling :ref:`ioctl VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` for a
+request that has been queued but not yet completed will return ``EBUSY``
+since the control values might be changed at any time by the driver while the
+request is in flight.
+
+.. _media-request-life-time:
+
+Recycling and Destruction
+-------------------------
+
+Finally, a completed request can either be discarded or be reused. Calling
+:c:func:`close()` on a request file descriptor will make
+that file descriptor unusable and the request will be freed once it is no
+longer in use by the kernel. That is, if the request is queued and then the
+file descriptor is closed, then it won't be freed until the driver completed
+the request.
+
+The :ref:`MEDIA_REQUEST_IOC_REINIT` will clear a request's state and make it
+available again. No state is retained by this operation: the request is as
+if it had just been allocated.
+
+Example for a Codec Device
+--------------------------
+
+For use-cases such as :ref:`codecs <mem2mem>`, the request API can be used
+to associate specific controls to
+be applied by the driver for the OUTPUT buffer, allowing user-space
+to queue many such buffers in advance. It can also take advantage of requests'
+ability to capture the state of controls when the request completes to read back
+information that may be subject to change.
+
+Put into code, after obtaining a request, user-space can assign controls and one
+OUTPUT buffer to it:
+
+.. code-block:: c
+
+	struct v4l2_buffer buf;
+	struct v4l2_ext_controls ctrls;
+	int req_fd;
+	...
+	if (ioctl(media_fd, MEDIA_IOC_REQUEST_ALLOC, &req_fd))
+		return errno;
+	...
+	ctrls.which = V4L2_CTRL_WHICH_REQUEST_VAL;
+	ctrls.request_fd = req_fd;
+	if (ioctl(codec_fd, VIDIOC_S_EXT_CTRLS, &ctrls))
+		return errno;
+	...
+	buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+	buf.flags |= V4L2_BUF_FLAG_REQUEST_FD;
+	buf.request_fd = req_fd;
+	if (ioctl(codec_fd, VIDIOC_QBUF, &buf))
+		return errno;
+
+Note that it is not allowed to use the Request API for CAPTURE buffers
+since there are no per-frame settings to report there.
+
+Once the request is fully prepared, it can be queued to the driver:
+
+.. code-block:: c
+
+	if (ioctl(req_fd, MEDIA_REQUEST_IOC_QUEUE))
+		return errno;
+
+User-space can then either wait for the request to complete by calling poll() on
+its file descriptor, or start dequeuing CAPTURE buffers. Most likely, it will
+want to get CAPTURE buffers as soon as possible and this can be done using a
+regular :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`:
+
+.. code-block:: c
+
+	struct v4l2_buffer buf;
+
+	memset(&buf, 0, sizeof(buf));
+	buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	if (ioctl(codec_fd, VIDIOC_DQBUF, &buf))
+		return errno;
+
+Note that this example assumes for simplicity that for every OUTPUT buffer
+there will be one CAPTURE buffer, but this does not have to be the case.
+
+We can then, after ensuring that the request is completed via polling the
+request file descriptor, query control values at the time of its completion via
+a call to :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`.
+This is particularly useful for volatile controls for which we want to
+query values as soon as the capture buffer is produced.
+
+.. code-block:: c
+
+	struct pollfd pfd = { .events = POLLPRI, .fd = req_fd };
+	poll(&pfd, 1, -1);
+	...
+	ctrls.which = V4L2_CTRL_WHICH_REQUEST_VAL;
+	ctrls.request_fd = req_fd;
+	if (ioctl(codec_fd, VIDIOC_G_EXT_CTRLS, &ctrls))
+		return errno;
+
+Once we don't need the request anymore, we can either recycle it for reuse with
+:ref:`MEDIA_REQUEST_IOC_REINIT`...
+
+.. code-block:: c
+
+	if (ioctl(req_fd, MEDIA_REQUEST_IOC_REINIT))
+		return errno;
+
+... or close its file descriptor to completely dispose of it.
+
+.. code-block:: c
+
+	close(req_fd);
+
+Example for a Simple Capture Device
+-----------------------------------
+
+With a simple capture device, requests can be used to specify controls to apply
+for a given CAPTURE buffer.
+
+.. code-block:: c
+
+	struct v4l2_buffer buf;
+	struct v4l2_ext_controls ctrls;
+	int req_fd;
+	...
+	if (ioctl(media_fd, MEDIA_IOC_REQUEST_ALLOC, &req_fd))
+		return errno;
+	...
+	ctrls.which = V4L2_CTRL_WHICH_REQUEST_VAL;
+	ctrls.request_fd = req_fd;
+	if (ioctl(camera_fd, VIDIOC_S_EXT_CTRLS, &ctrls))
+		return errno;
+	...
+	buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	buf.flags |= V4L2_BUF_FLAG_REQUEST_FD;
+	buf.request_fd = req_fd;
+	if (ioctl(camera_fd, VIDIOC_QBUF, &buf))
+		return errno;
+
+Once the request is fully prepared, it can be queued to the driver:
+
+.. code-block:: c
+
+	if (ioctl(req_fd, MEDIA_REQUEST_IOC_QUEUE))
+		return errno;
+
+User-space can then dequeue buffers, wait for the request completion, query
+controls and recycle the request as in the M2M example above.
diff --git a/Documentation/userspace-api/media/mediactl/request-func-close.rst b/Documentation/userspace-api/media/mediactl/request-func-close.rst
new file mode 100644
index 000000000..f4b8eb385
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/request-func-close.rst
@@ -0,0 +1,45 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC.request
+
+.. _request-func-close:
+
+***************
+request close()
+***************
+
+Name
+====
+
+request-close - Close a request file descriptor
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: int close( int fd )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`.
+
+Description
+===========
+
+Closes the request file descriptor. Resources associated with the request
+are freed once all file descriptors associated with the request are closed
+and the driver has completed the request.
+See :ref:`here <media-request-life-time>` for more information.
+
+Return Value
+============
+
+:c:func:`close()` returns 0 on success. On error, -1 is
+returned, and ``errno`` is set appropriately. Possible error codes are:
+
+EBADF
+    ``fd`` is not a valid open file descriptor.
diff --git a/Documentation/userspace-api/media/mediactl/request-func-ioctl.rst b/Documentation/userspace-api/media/mediactl/request-func-ioctl.rst
new file mode 100644
index 000000000..4fb3d2ef3
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/request-func-ioctl.rst
@@ -0,0 +1,63 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _request-func-ioctl:
+
+***************
+request ioctl()
+***************
+
+Name
+====
+
+request-ioctl - Control a request file descriptor
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/ioctl.h>
+
+``int ioctl(int fd, int cmd, void *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`.
+
+``cmd``
+    The request ioctl command code as defined in the media.h header file, for
+    example :ref:`MEDIA_REQUEST_IOC_QUEUE`.
+
+``argp``
+    Pointer to a request-specific structure.
+
+Description
+===========
+
+The :ref:`ioctl() <request-func-ioctl>` function manipulates request
+parameters. The argument ``fd`` must be an open file descriptor.
+
+The ioctl ``cmd`` code specifies the request function to be called. It
+has encoded in it whether the argument is an input, output or read/write
+parameter, and the size of the argument ``argp`` in bytes.
+
+Macros and structures definitions specifying request ioctl commands and
+their parameters are located in the media.h header file. All request ioctl
+commands, their respective function and parameters are specified in
+:ref:`media-user-func`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+Command-specific error codes are listed in the individual command
+descriptions.
+
+When an ioctl that takes an output or read/write parameter fails, the
+parameter remains unmodified.
diff --git a/Documentation/userspace-api/media/mediactl/request-func-poll.rst b/Documentation/userspace-api/media/mediactl/request-func-poll.rst
new file mode 100644
index 000000000..ce0043dbe
--- /dev/null
+++ b/Documentation/userspace-api/media/mediactl/request-func-poll.rst
@@ -0,0 +1,73 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+.. c:namespace:: MC
+
+.. _request-func-poll:
+
+**************
+request poll()
+**************
+
+Name
+====
+
+request-poll - Wait for some event on a file descriptor
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/poll.h>
+
+.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
+
+Arguments
+=========
+
+``ufds``
+   List of file descriptor events to be watched
+
+``nfds``
+   Number of file descriptor events at the \*ufds array
+
+``timeout``
+   Timeout to wait for events
+
+Description
+===========
+
+With the :c:func:`poll()` function applications can wait
+for a request to complete.
+
+On success :c:func:`poll()` returns the number of file
+descriptors that have been selected (that is, file descriptors for which the
+``revents`` field of the respective struct :c:type:`pollfd`
+is non-zero). Request file descriptor set the ``POLLPRI`` flag in ``revents``
+when the request was completed.  When the function times out it returns
+a value of zero, on failure it returns -1 and the ``errno`` variable is
+set appropriately.
+
+Attempting to poll for a request that is not yet queued will
+set the ``POLLERR`` flag in ``revents``.
+
+Return Value
+============
+
+On success, :c:func:`poll()` returns the number of
+structures which have non-zero ``revents`` fields, or zero if the call
+timed out. On error -1 is returned, and the ``errno`` variable is set
+appropriately:
+
+``EBADF``
+    One or more of the ``ufds`` members specify an invalid file
+    descriptor.
+
+``EFAULT``
+    ``ufds`` references an inaccessible memory area.
+
+``EINTR``
+    The call was interrupted by a signal.
+
+``EINVAL``
+    The ``nfds`` value exceeds the ``RLIMIT_NOFILE`` value. Use
+    ``getrlimit()`` to obtain this value.
diff --git a/Documentation/userspace-api/media/net.h.rst.exceptions b/Documentation/userspace-api/media/net.h.rst.exceptions
new file mode 100644
index 000000000..5159aa4bb
--- /dev/null
+++ b/Documentation/userspace-api/media/net.h.rst.exceptions
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _DVBNET_H_
+
+# Ignore old ioctls/structs
+ignore ioctl __NET_ADD_IF_OLD
+ignore ioctl __NET_GET_IF_OLD
+ignore struct __dvb_net_if_old
+
+# Macros used at struct dvb_net_if
+replace define DVB_NET_FEEDTYPE_MPE :c:type:`dvb_net_if`
+replace define DVB_NET_FEEDTYPE_ULE :c:type:`dvb_net_if`
diff --git a/Documentation/userspace-api/media/rc/keytable.c.rst b/Documentation/userspace-api/media/rc/keytable.c.rst
new file mode 100644
index 000000000..0b50cfaf2
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/keytable.c.rst
@@ -0,0 +1,176 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+file: uapi/v4l/keytable.c
+=========================
+
+.. code-block:: c
+
+    /* keytable.c - This program allows checking/replacing keys at IR
+
+       Copyright (C) 2006-2009 Mauro Carvalho Chehab <mchehab@kernel.org>
+
+       This program is free software; you can redistribute it and/or modify
+       it under the terms of the GNU General Public License as published by
+       the Free Software Foundation, version 2 of the License.
+
+       This program is distributed in the hope that it will be useful,
+       but WITHOUT ANY WARRANTY; without even the implied warranty of
+       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+       GNU General Public License for more details.
+     */
+
+    #include <ctype.h>
+    #include <errno.h>
+    #include <fcntl.h>
+    #include <stdio.h>
+    #include <stdlib.h>
+    #include <string.h>
+    #include <linux/input.h>
+    #include <sys/ioctl.h>
+
+    #include "parse.h"
+
+    void prtcode (int *codes)
+    {
+	    struct parse_key *p;
+
+	    for (p=keynames;p->name!=NULL;p++) {
+		    if (p->value == (unsigned)codes[1]) {
+			    printf("scancode 0x%04x = %s (0x%02x)\\n", codes[0], p->name, codes[1]);
+			    return;
+		    }
+	    }
+
+	    if (isprint (codes[1]))
+		    printf("scancode %d = '%c' (0x%02x)\\n", codes[0], codes[1], codes[1]);
+	    else
+		    printf("scancode %d = 0x%02x\\n", codes[0], codes[1]);
+    }
+
+    int parse_code(char *string)
+    {
+	    struct parse_key *p;
+
+	    for (p=keynames;p->name!=NULL;p++) {
+		    if (!strcasecmp(p->name, string)) {
+			    return p->value;
+		    }
+	    }
+	    return -1;
+    }
+
+    int main (int argc, char *argv[])
+    {
+	    int fd;
+	    unsigned int i, j;
+	    int codes[2];
+
+	    if (argc<2 || argc>4) {
+		    printf ("usage: %s <device> to get table; or\\n"
+			    "       %s <device> <scancode> <keycode>\\n"
+			    "       %s <device> <keycode_file>n",*argv,*argv,*argv);
+		    return -1;
+	    }
+
+	    if ((fd = open(argv[1], O_RDONLY)) < 0) {
+		    perror("Couldn't open input device");
+		    return(-1);
+	    }
+
+	    if (argc==4) {
+		    int value;
+
+		    value=parse_code(argv[3]);
+
+		    if (value==-1) {
+			    value = strtol(argv[3], NULL, 0);
+			    if (errno)
+				    perror("value");
+		    }
+
+		    codes [0] = (unsigned) strtol(argv[2], NULL, 0);
+		    codes [1] = (unsigned) value;
+
+		    if(ioctl(fd, EVIOCSKEYCODE, codes))
+			    perror ("EVIOCSKEYCODE");
+
+		    if(ioctl(fd, EVIOCGKEYCODE, codes)==0)
+			    prtcode(codes);
+		    return 0;
+	    }
+
+	    if (argc==3) {
+		    FILE *fin;
+		    int value;
+		    char *scancode, *keycode, s[2048];
+
+		    fin=fopen(argv[2],"r");
+		    if (fin==NULL) {
+			    perror ("opening keycode file");
+			    return -1;
+		    }
+
+		    /* Clears old table */
+		    for (j = 0; j < 256; j++) {
+			    for (i = 0; i < 256; i++) {
+				    codes[0] = (j << 8) | i;
+				    codes[1] = KEY_RESERVED;
+				    ioctl(fd, EVIOCSKEYCODE, codes);
+			    }
+		    }
+
+		    while (fgets(s,sizeof(s),fin)) {
+			    scancode=strtok(s,"\\n\\t =:");
+			    if (!scancode) {
+				    perror ("parsing input file scancode");
+				    return -1;
+			    }
+			    if (!strcasecmp(scancode, "scancode")) {
+				    scancode = strtok(NULL,"\\n\\t =:");
+				    if (!scancode) {
+					    perror ("parsing input file scancode");
+					    return -1;
+				    }
+			    }
+
+			    keycode=strtok(NULL,"\\n\\t =:(");
+			    if (!keycode) {
+				    perror ("parsing input file keycode");
+				    return -1;
+			    }
+
+			    // printf ("parsing %s=%s:", scancode, keycode);
+			    value=parse_code(keycode);
+			    // printf ("\\tvalue=%d\\n",value);
+
+			    if (value==-1) {
+				    value = strtol(keycode, NULL, 0);
+				    if (errno)
+					    perror("value");
+			    }
+
+			    codes [0] = (unsigned) strtol(scancode, NULL, 0);
+			    codes [1] = (unsigned) value;
+
+			    // printf("\\t%04x=%04x\\n",codes[0], codes[1]);
+			    if(ioctl(fd, EVIOCSKEYCODE, codes)) {
+				    fprintf(stderr, "Setting scancode 0x%04x with 0x%04x via ",codes[0], codes[1]);
+				    perror ("EVIOCSKEYCODE");
+			    }
+
+			    if(ioctl(fd, EVIOCGKEYCODE, codes)==0)
+				    prtcode(codes);
+		    }
+		    return 0;
+	    }
+
+	    /* Get scancode table */
+	    for (j = 0; j < 256; j++) {
+		    for (i = 0; i < 256; i++) {
+			    codes[0] = (j << 8) | i;
+			    if (!ioctl(fd, EVIOCGKEYCODE, codes) && codes[1] != KEY_RESERVED)
+				    prtcode(codes);
+		    }
+	    }
+	    return 0;
+    }
diff --git a/Documentation/userspace-api/media/rc/lirc-dev-intro.rst b/Documentation/userspace-api/media/rc/lirc-dev-intro.rst
new file mode 100644
index 000000000..167b354bf
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-dev-intro.rst
@@ -0,0 +1,164 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _lirc_dev_intro:
+
+************
+Introduction
+************
+
+LIRC stands for Linux Infrared Remote Control. The LIRC device interface is
+a bi-directional interface for transporting raw IR and decoded scancodes
+data between userspace and kernelspace. Fundamentally, it is just a chardev
+(/dev/lircX, for X = 0, 1, 2, ...), with a number of standard struct
+file_operations defined on it. With respect to transporting raw IR and
+decoded scancodes to and fro, the essential fops are read, write and ioctl.
+
+It is also possible to attach a BPF program to a LIRC device for decoding
+raw IR into scancodes.
+
+Example dmesg output upon a driver registering w/LIRC:
+
+.. code-block:: none
+
+    $ dmesg |grep lirc_dev
+    rc rc0: lirc_dev: driver mceusb registered at minor = 0, raw IR receiver, raw IR transmitter
+
+What you should see for a chardev:
+
+.. code-block:: none
+
+    $ ls -l /dev/lirc*
+    crw-rw---- 1 root root 248, 0 Jul 2 22:20 /dev/lirc0
+
+Note that the package `v4l-utils <https://git.linuxtv.org/v4l-utils.git/>`_
+contains tools for working with LIRC devices:
+
+ - ir-ctl: can receive raw IR and transmit IR, as well as query LIRC
+   device features.
+
+ - ir-keytable: can load keymaps; allows you to set IR kernel protocols; load
+   BPF IR decoders and test IR decoding. Some BPF IR decoders are also
+   provided.
+
+.. _lirc_modes:
+
+**********
+LIRC modes
+**********
+
+LIRC supports some modes of receiving and sending IR codes, as shown
+on the following table.
+
+.. _lirc-mode-scancode:
+.. _lirc-scancode-flag-toggle:
+.. _lirc-scancode-flag-repeat:
+
+``LIRC_MODE_SCANCODE``
+
+    This mode is for both sending and receiving IR.
+
+    For transmitting (aka sending), create a ``struct lirc_scancode`` with
+    the desired scancode set in the ``scancode`` member, :c:type:`rc_proto`
+    set to the :ref:`IR protocol <Remote_controllers_Protocols>`, and all other
+    members set to 0. Write this struct to the lirc device.
+
+    For receiving, you read ``struct lirc_scancode`` from the LIRC device.
+    The ``scancode`` field is set to the received scancode and the
+    :ref:`IR protocol <Remote_controllers_Protocols>` is set in
+    :c:type:`rc_proto`. If the scancode maps to a valid key code, this is set
+    in the ``keycode`` field, else it is set to ``KEY_RESERVED``.
+
+    The ``flags`` can have ``LIRC_SCANCODE_FLAG_TOGGLE`` set if the toggle
+    bit is set in protocols that support it (e.g. rc-5 and rc-6), or
+    ``LIRC_SCANCODE_FLAG_REPEAT`` for when a repeat is received for protocols
+    that support it (e.g. nec).
+
+    In the Sanyo and NEC protocol, if you hold a button on remote, rather than
+    repeating the entire scancode, the remote sends a shorter message with
+    no scancode, which just means button is held, a "repeat". When this is
+    received, the ``LIRC_SCANCODE_FLAG_REPEAT`` is set and the scancode and
+    keycode is repeated.
+
+    With nec, there is no way to distinguish "button hold" from "repeatedly
+    pressing the same button". The rc-5 and rc-6 protocols have a toggle bit.
+    When a button is released and pressed again, the toggle bit is inverted.
+    If the toggle bit is set, the ``LIRC_SCANCODE_FLAG_TOGGLE`` is set.
+
+    The ``timestamp`` field is filled with the time nanoseconds
+    (in ``CLOCK_MONOTONIC``) when the scancode was decoded.
+
+.. _lirc-mode-mode2:
+
+``LIRC_MODE_MODE2``
+
+    The driver returns a sequence of pulse and space codes to userspace,
+    as a series of u32 values.
+
+    This mode is used only for IR receive.
+
+    The upper 8 bits determine the packet type, and the lower 24 bits
+    the payload. Use ``LIRC_VALUE()`` macro to get the payload, and
+    the macro ``LIRC_MODE2()`` will give you the type, which
+    is one of:
+
+    ``LIRC_MODE2_PULSE``
+
+        Signifies the presence of IR in microseconds.
+
+    ``LIRC_MODE2_SPACE``
+
+        Signifies absence of IR in microseconds.
+
+    ``LIRC_MODE2_FREQUENCY``
+
+        If measurement of the carrier frequency was enabled with
+        :ref:`lirc_set_measure_carrier_mode` then this packet gives you
+        the carrier frequency in Hertz.
+
+    ``LIRC_MODE2_TIMEOUT``
+
+        If timeout reports are enabled with
+        :ref:`lirc_set_rec_timeout_reports`, when the timeout set with
+        :ref:`lirc_set_rec_timeout` expires due to no IR being detected,
+        this packet will be sent, with the number of microseconds with
+        no IR.
+
+.. _lirc-mode-pulse:
+
+``LIRC_MODE_PULSE``
+
+    In pulse mode, a sequence of pulse/space integer values are written to the
+    lirc device using :ref:`lirc-write`.
+
+    The values are alternating pulse and space lengths, in microseconds. The
+    first and last entry must be a pulse, so there must be an odd number
+    of entries.
+
+    This mode is used only for IR send.
+
+********************
+BPF based IR decoder
+********************
+
+The kernel has support for decoding the most common
+:ref:`IR protocols <Remote_controllers_Protocols>`, but there
+are many protocols which are not supported. To support these, it is possible
+to load an BPF program which does the decoding. This can only be done on
+LIRC devices which support reading raw IR.
+
+First, using the `bpf(2)`_ syscall with the ``BPF_LOAD_PROG`` argument,
+program must be loaded of type ``BPF_PROG_TYPE_LIRC_MODE2``. Once attached
+to the LIRC device, this program will be called for each pulse, space or
+timeout event on the LIRC device. The context for the BPF program is a
+pointer to a unsigned int, which is a :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>`
+value. When the program has decoded the scancode, it can be submitted using
+the BPF functions ``bpf_rc_keydown()`` or ``bpf_rc_repeat()``. Mouse or pointer
+movements can be reported using ``bpf_rc_pointer_rel()``.
+
+Once you have the file descriptor for the ``BPF_PROG_TYPE_LIRC_MODE2`` BPF
+program, it can be attached to the LIRC device using the `bpf(2)`_ syscall.
+The target must be the file descriptor for the LIRC device, and the
+attach type must be ``BPF_LIRC_MODE2``. No more than 64 BPF programs can be
+attached to a single LIRC device at a time.
+
+.. _bpf(2): http://man7.org/linux/man-pages/man2/bpf.2.html
diff --git a/Documentation/userspace-api/media/rc/lirc-dev.rst b/Documentation/userspace-api/media/rc/lirc-dev.rst
new file mode 100644
index 000000000..5510dc02a
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-dev.rst
@@ -0,0 +1,14 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _lirc_dev:
+
+LIRC Device Interface
+=====================
+
+
+.. toctree::
+    :maxdepth: 1
+
+    lirc-dev-intro
+    lirc-func
+    lirc-header
diff --git a/Documentation/userspace-api/media/rc/lirc-func.rst b/Documentation/userspace-api/media/rc/lirc-func.rst
new file mode 100644
index 000000000..420a3dbf0
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-func.rst
@@ -0,0 +1,27 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _lirc_func:
+
+LIRC Function Reference
+=======================
+
+
+.. toctree::
+    :maxdepth: 1
+
+    lirc-read
+    lirc-write
+    lirc-get-features
+    lirc-get-send-mode
+    lirc-get-rec-mode
+    lirc-get-rec-resolution
+    lirc-set-send-duty-cycle
+    lirc-get-timeout
+    lirc-set-rec-timeout
+    lirc-set-rec-carrier
+    lirc-set-rec-carrier-range
+    lirc-set-send-carrier
+    lirc-set-transmitter-mask
+    lirc-set-rec-timeout-reports
+    lirc-set-measure-carrier-mode
+    lirc-set-wideband-receiver
diff --git a/Documentation/userspace-api/media/rc/lirc-get-features.rst b/Documentation/userspace-api/media/rc/lirc-get-features.rst
new file mode 100644
index 000000000..66a243dbd
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-get-features.rst
@@ -0,0 +1,192 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_get_features:
+
+***********************
+ioctl LIRC_GET_FEATURES
+***********************
+
+Name
+====
+
+LIRC_GET_FEATURES - Get the underlying hardware device's features
+
+Synopsis
+========
+
+.. c:macro:: LIRC_GET_FEATURES
+
+``int ioctl(int fd, LIRC_GET_FEATURES, __u32 *features)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``features``
+    Bitmask with the LIRC features.
+
+Description
+===========
+
+Get the underlying hardware device's features. If a driver does not
+announce support of certain features, calling of the corresponding ioctls
+is undefined.
+
+LIRC features
+=============
+
+.. _LIRC-CAN-REC-RAW:
+
+``LIRC_CAN_REC_RAW``
+
+    Unused. Kept just to avoid breaking uAPI.
+
+.. _LIRC-CAN-REC-PULSE:
+
+``LIRC_CAN_REC_PULSE``
+
+    Unused. Kept just to avoid breaking uAPI.
+    :ref:`LIRC_MODE_PULSE <lirc-mode-pulse>` can only be used for transmitting.
+
+.. _LIRC-CAN-REC-MODE2:
+
+``LIRC_CAN_REC_MODE2``
+
+    This is raw IR driver for receiving. This means that
+    :ref:`LIRC_MODE_MODE2 <lirc-mode-MODE2>` is used. This also implies
+    that :ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is also supported,
+    as long as the kernel is recent enough. Use the
+    :ref:`lirc_set_rec_mode` to switch modes.
+
+.. _LIRC-CAN-REC-LIRCCODE:
+
+``LIRC_CAN_REC_LIRCCODE``
+
+    Unused. Kept just to avoid breaking uAPI.
+
+.. _LIRC-CAN-REC-SCANCODE:
+
+``LIRC_CAN_REC_SCANCODE``
+
+    This is a scancode driver for receiving. This means that
+    :ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is used.
+
+.. _LIRC-CAN-SET-SEND-CARRIER:
+
+``LIRC_CAN_SET_SEND_CARRIER``
+
+    The driver supports changing the modulation frequency via
+    :ref:`ioctl LIRC_SET_SEND_CARRIER <LIRC_SET_SEND_CARRIER>`.
+
+.. _LIRC-CAN-SET-SEND-DUTY-CYCLE:
+
+``LIRC_CAN_SET_SEND_DUTY_CYCLE``
+
+    The driver supports changing the duty cycle using
+    :ref:`ioctl LIRC_SET_SEND_DUTY_CYCLE <LIRC_SET_SEND_DUTY_CYCLE>`.
+
+.. _LIRC-CAN-SET-TRANSMITTER-MASK:
+
+``LIRC_CAN_SET_TRANSMITTER_MASK``
+
+    The driver supports changing the active transmitter(s) using
+    :ref:`ioctl LIRC_SET_TRANSMITTER_MASK <LIRC_SET_TRANSMITTER_MASK>`.
+
+.. _LIRC-CAN-SET-REC-CARRIER:
+
+``LIRC_CAN_SET_REC_CARRIER``
+
+    The driver supports setting the receive carrier frequency using
+    :ref:`ioctl LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>`.
+
+.. _LIRC-CAN-SET-REC-DUTY-CYCLE-RANGE:
+
+``LIRC_CAN_SET_REC_DUTY_CYCLE_RANGE``
+
+    Unused. Kept just to avoid breaking uAPI.
+
+.. _LIRC-CAN-SET-REC-CARRIER-RANGE:
+
+``LIRC_CAN_SET_REC_CARRIER_RANGE``
+
+    The driver supports
+    :ref:`ioctl LIRC_SET_REC_CARRIER_RANGE <LIRC_SET_REC_CARRIER_RANGE>`.
+
+.. _LIRC-CAN-GET-REC-RESOLUTION:
+
+``LIRC_CAN_GET_REC_RESOLUTION``
+
+    The driver supports
+    :ref:`ioctl LIRC_GET_REC_RESOLUTION <LIRC_GET_REC_RESOLUTION>`.
+
+.. _LIRC-CAN-SET-REC-TIMEOUT:
+
+``LIRC_CAN_SET_REC_TIMEOUT``
+
+    The driver supports
+    :ref:`ioctl LIRC_SET_REC_TIMEOUT <LIRC_SET_REC_TIMEOUT>`.
+
+.. _LIRC-CAN-SET-REC-FILTER:
+
+``LIRC_CAN_SET_REC_FILTER``
+
+    Unused. Kept just to avoid breaking uAPI.
+
+.. _LIRC-CAN-MEASURE-CARRIER:
+
+``LIRC_CAN_MEASURE_CARRIER``
+
+    The driver supports measuring of the modulation frequency using
+    :ref:`ioctl LIRC_SET_MEASURE_CARRIER_MODE <LIRC_SET_MEASURE_CARRIER_MODE>`.
+
+.. _LIRC-CAN-USE-WIDEBAND-RECEIVER:
+
+``LIRC_CAN_USE_WIDEBAND_RECEIVER``
+
+    The driver supports learning mode using
+    :ref:`ioctl LIRC_SET_WIDEBAND_RECEIVER <LIRC_SET_WIDEBAND_RECEIVER>`.
+
+.. _LIRC-CAN-NOTIFY-DECODE:
+
+``LIRC_CAN_NOTIFY_DECODE``
+
+    Unused. Kept just to avoid breaking uAPI.
+
+.. _LIRC-CAN-SEND-RAW:
+
+``LIRC_CAN_SEND_RAW``
+
+    Unused. Kept just to avoid breaking uAPI.
+
+.. _LIRC-CAN-SEND-PULSE:
+
+``LIRC_CAN_SEND_PULSE``
+
+    The driver supports sending (also called as IR blasting or IR TX) using
+    :ref:`LIRC_MODE_PULSE <lirc-mode-pulse>`. This implies that
+    :ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is also supported for
+    transmit, as long as the kernel is recent enough. Use the
+    :ref:`lirc_set_send_mode` to switch modes.
+
+.. _LIRC-CAN-SEND-MODE2:
+
+``LIRC_CAN_SEND_MODE2``
+
+    Unused. Kept just to avoid breaking uAPI.
+    :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` can only be used for receiving.
+
+.. _LIRC-CAN-SEND-LIRCCODE:
+
+``LIRC_CAN_SEND_LIRCCODE``
+
+    Unused. Kept just to avoid breaking uAPI.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-get-rec-mode.rst b/Documentation/userspace-api/media/rc/lirc-get-rec-mode.rst
new file mode 100644
index 000000000..188478ed1
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-get-rec-mode.rst
@@ -0,0 +1,69 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_get_rec_mode:
+.. _lirc_set_rec_mode:
+
+**********************************************
+ioctls LIRC_GET_REC_MODE and LIRC_SET_REC_MODE
+**********************************************
+
+Name
+====
+
+LIRC_GET_REC_MODE/LIRC_SET_REC_MODE - Get/set current receive mode.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_GET_REC_MODE
+
+``int ioctl(int fd, LIRC_GET_REC_MODE, __u32 *mode)``
+
+.. c:macro:: LIRC_SET_REC_MODE
+
+``int ioctl(int fd, LIRC_SET_REC_MODE, __u32 *mode)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``mode``
+    Mode used for receive.
+
+Description
+===========
+
+Get and set the current receive mode. Only
+:ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` and
+:ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` are supported.
+Use :ref:`lirc_get_features` to find out which modes the driver supports.
+
+Return Value
+============
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``ENODEV``
+
+       -  Device not available.
+
+    -  .. row 2
+
+       -  ``ENOTTY``
+
+       -  Device does not support receiving.
+
+    -  .. row 3
+
+       -  ``EINVAL``
+
+       -  Invalid mode or invalid mode for this device.
diff --git a/Documentation/userspace-api/media/rc/lirc-get-rec-resolution.rst b/Documentation/userspace-api/media/rc/lirc-get-rec-resolution.rst
new file mode 100644
index 000000000..e29445c5c
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-get-rec-resolution.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_get_rec_resolution:
+
+*****************************
+ioctl LIRC_GET_REC_RESOLUTION
+*****************************
+
+Name
+====
+
+LIRC_GET_REC_RESOLUTION - Obtain the value of receive resolution, in microseconds.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_GET_REC_RESOLUTION
+
+``int ioctl(int fd, LIRC_GET_REC_RESOLUTION, __u32 *microseconds)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``microseconds``
+    Resolution, in microseconds.
+
+Description
+===========
+
+Some receivers have maximum resolution which is defined by internal
+sample rate or data format limitations. E.g. it's common that
+signals can only be reported in 50 microsecond steps.
+
+This ioctl returns the integer value with such resolution, with can be
+used by userspace applications like lircd to automatically adjust the
+tolerance value.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-get-send-mode.rst b/Documentation/userspace-api/media/rc/lirc-get-send-mode.rst
new file mode 100644
index 000000000..77472fb56
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-get-send-mode.rst
@@ -0,0 +1,71 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_get_send_mode:
+.. _lirc_set_send_mode:
+
+************************************************
+ioctls LIRC_GET_SEND_MODE and LIRC_SET_SEND_MODE
+************************************************
+
+Name
+====
+
+LIRC_GET_SEND_MODE/LIRC_SET_SEND_MODE - Get/set current transmit mode.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_GET_SEND_MODE
+
+``int ioctl(int fd, LIRC_GET_SEND_MODE, __u32 *mode)``
+
+.. c:macro:: LIRC_SET_SEND_MODE
+
+``int ioctl(int fd, LIRC_SET_SEND_MODE, __u32 *mode)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``mode``
+    The mode used for transmitting.
+
+Description
+===========
+
+Get/set current transmit mode.
+
+Only :ref:`LIRC_MODE_PULSE <lirc-mode-pulse>` and
+:ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` are supported by for IR send,
+depending on the driver. Use :ref:`lirc_get_features` to find out which
+modes the driver supports.
+
+Return Value
+============
+
+.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  ``ENODEV``
+
+       -  Device not available.
+
+    -  .. row 2
+
+       -  ``ENOTTY``
+
+       -  Device does not support transmitting.
+
+    -  .. row 3
+
+       -  ``EINVAL``
+
+       -  Invalid mode or invalid mode for this device.
diff --git a/Documentation/userspace-api/media/rc/lirc-get-timeout.rst b/Documentation/userspace-api/media/rc/lirc-get-timeout.rst
new file mode 100644
index 000000000..f5f3e06d6
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-get-timeout.rst
@@ -0,0 +1,57 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_get_min_timeout:
+.. _lirc_get_max_timeout:
+
+****************************************************
+ioctls LIRC_GET_MIN_TIMEOUT and LIRC_GET_MAX_TIMEOUT
+****************************************************
+
+Name
+====
+
+LIRC_GET_MIN_TIMEOUT / LIRC_GET_MAX_TIMEOUT - Obtain the possible timeout
+range for IR receive.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_GET_MIN_TIMEOUT
+
+``int ioctl(int fd, LIRC_GET_MIN_TIMEOUT, __u32 *timeout)``
+
+.. c:macro:: LIRC_GET_MAX_TIMEOUT
+
+``int ioctl(int fd, LIRC_GET_MAX_TIMEOUT, __u32 *timeout)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``timeout``
+    Timeout, in microseconds.
+
+Description
+===========
+
+Some devices have internal timers that can be used to detect when
+there's no IR activity for a long time. This can help lircd in
+detecting that a IR signal is finished and can speed up the decoding
+process. Returns an integer value with the minimum/maximum timeout
+that can be set.
+
+.. note::
+
+   Some devices have a fixed timeout, in that case
+   both ioctls will return the same value even though the timeout
+   cannot be changed via :ref:`LIRC_SET_REC_TIMEOUT`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-header.rst b/Documentation/userspace-api/media/rc/lirc-header.rst
new file mode 100644
index 000000000..8bd0acc99
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-header.rst
@@ -0,0 +1,10 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _lirc_header:
+
+****************
+LIRC Header File
+****************
+
+.. kernel-include:: $BUILDDIR/lirc.h.rst
+
diff --git a/Documentation/userspace-api/media/rc/lirc-read.rst b/Documentation/userspace-api/media/rc/lirc-read.rst
new file mode 100644
index 000000000..d58956021
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-read.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc-read:
+
+***********
+LIRC read()
+***********
+
+Name
+====
+
+lirc-read - Read from a LIRC device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: ssize_t read( int fd, void *buf, size_t count )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by ``open()``.
+
+``buf``
+   Buffer to be filled
+
+``count``
+   Max number of bytes to read
+
+Description
+===========
+
+:c:func:`read()` attempts to read up to ``count`` bytes from file
+descriptor ``fd`` into the buffer starting at ``buf``.  If ``count`` is zero,
+:c:func:`read()` returns zero and has no other results. If ``count``
+is greater than ``SSIZE_MAX``, the result is unspecified.
+
+The exact format of the data depends on what :ref:`lirc_modes` a driver
+uses. Use :ref:`lirc_get_features` to get the supported mode, and use
+:ref:`lirc_set_rec_mode` set the current active mode.
+
+The mode :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` is for raw IR,
+in which packets containing an unsigned int value describing an IR signal are
+read from the chardev.
+
+Alternatively, :ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` can be available,
+in this mode scancodes which are either decoded by software decoders, or
+by hardware decoders. The :c:type:`rc_proto` member is set to the
+:ref:`IR protocol <Remote_controllers_Protocols>`
+used for transmission, and ``scancode`` to the decoded scancode,
+and the ``keycode`` set to the keycode or ``KEY_RESERVED``.
+
+Return Value
+============
+
+On success, the number of bytes read is returned. It is not an error if
+this number is smaller than the number of bytes requested, or the amount
+of data required for one frame.  On error, -1 is returned, and the ``errno``
+variable is set appropriately.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-measure-carrier-mode.rst b/Documentation/userspace-api/media/rc/lirc-set-measure-carrier-mode.rst
new file mode 100644
index 000000000..9bf9811a9
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-measure-carrier-mode.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_measure_carrier_mode:
+
+***********************************
+ioctl LIRC_SET_MEASURE_CARRIER_MODE
+***********************************
+
+Name
+====
+
+LIRC_SET_MEASURE_CARRIER_MODE - enable or disable measure mode
+
+Synopsis
+========
+
+.. c:macro:: LIRC_SET_MEASURE_CARRIER_MODE
+
+``int ioctl(int fd, LIRC_SET_MEASURE_CARRIER_MODE, __u32 *enable)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``enable``
+    enable = 1 means enable measure mode, enable = 0 means disable measure
+    mode.
+
+Description
+===========
+
+.. _lirc-mode2-frequency:
+
+Enable or disable measure mode. If enabled, from the next key
+press on, the driver will send ``LIRC_MODE2_FREQUENCY`` packets. By
+default this should be turned off.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst b/Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst
new file mode 100644
index 000000000..530bc2239
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-rec-carrier-range.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_rec_carrier_range:
+
+********************************
+ioctl LIRC_SET_REC_CARRIER_RANGE
+********************************
+
+Name
+====
+
+LIRC_SET_REC_CARRIER_RANGE - Set lower bound of the carrier used to modulate
+IR receive.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_SET_REC_CARRIER_RANGE
+
+``int ioctl(int fd, LIRC_SET_REC_CARRIER_RANGE, __u32 *frequency)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``frequency``
+    Frequency of the carrier that modulates PWM data, in Hz.
+
+Description
+===========
+
+This ioctl sets the upper range of carrier frequency that will be recognized
+by the IR receiver.
+
+.. note::
+
+   To set a range use :ref:`LIRC_SET_REC_CARRIER_RANGE
+   <LIRC_SET_REC_CARRIER_RANGE>` with the lower bound first and later call
+   :ref:`LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>` with the upper bound.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-rec-carrier.rst b/Documentation/userspace-api/media/rc/lirc-set-rec-carrier.rst
new file mode 100644
index 000000000..28c928f1c
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-rec-carrier.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_rec_carrier:
+
+**************************
+ioctl LIRC_SET_REC_CARRIER
+**************************
+
+Name
+====
+
+LIRC_SET_REC_CARRIER - Set carrier used to modulate IR receive.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_SET_REC_CARRIER
+
+``int ioctl(int fd, LIRC_SET_REC_CARRIER, __u32 *frequency)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``frequency``
+    Frequency of the carrier that modulates PWM data, in Hz.
+
+Description
+===========
+
+Set receive carrier used to modulate IR PWM pulses and spaces.
+
+.. note::
+
+   If called together with :ref:`LIRC_SET_REC_CARRIER_RANGE`, this ioctl
+   sets the upper bound frequency that will be recognized by the device.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-rec-timeout-reports.rst b/Documentation/userspace-api/media/rc/lirc-set-rec-timeout-reports.rst
new file mode 100644
index 000000000..83e7155c5
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-rec-timeout-reports.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_rec_timeout_reports:
+
+**********************************
+ioctl LIRC_SET_REC_TIMEOUT_REPORTS
+**********************************
+
+Name
+====
+
+LIRC_SET_REC_TIMEOUT_REPORTS - enable or disable timeout reports for IR receive
+
+Synopsis
+========
+
+.. c:macro:: LIRC_SET_REC_TIMEOUT_REPORTS
+
+``int ioctl(int fd, LIRC_SET_REC_TIMEOUT_REPORTS, __u32 *enable)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``enable``
+    enable = 1 means enable timeout report, enable = 0 means disable timeout
+    reports.
+
+Description
+===========
+
+.. _lirc-mode2-timeout:
+
+Enable or disable timeout reports for IR receive. By default, timeout reports
+should be turned off.
+
+.. note::
+
+   This ioctl is only valid for :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-rec-timeout.rst b/Documentation/userspace-api/media/rc/lirc-set-rec-timeout.rst
new file mode 100644
index 000000000..8f3f9adf5
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-rec-timeout.rst
@@ -0,0 +1,55 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_rec_timeout:
+.. _lirc_get_rec_timeout:
+
+***************************************************
+ioctl LIRC_GET_REC_TIMEOUT and LIRC_SET_REC_TIMEOUT
+***************************************************
+
+Name
+====
+
+LIRC_GET_REC_TIMEOUT/LIRC_SET_REC_TIMEOUT - Get/set the integer value for IR inactivity timeout.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_GET_REC_TIMEOUT
+
+``int ioctl(int fd, LIRC_GET_REC_TIMEOUT, __u32 *timeout)``
+
+.. c:macro:: LIRC_SET_REC_TIMEOUT
+
+``int ioctl(int fd, LIRC_SET_REC_TIMEOUT, __u32 *timeout)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``timeout``
+    Timeout, in microseconds.
+
+Description
+===========
+
+Get and set the integer value for IR inactivity timeout.
+
+If supported by the hardware, setting it to 0  disables all hardware timeouts
+and data should be reported as soon as possible. If the exact value
+cannot be set, then the next possible value _greater_ than the
+given value should be set.
+
+.. note::
+
+   The range of supported timeout is given by :ref:`LIRC_GET_MIN_TIMEOUT`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-send-carrier.rst b/Documentation/userspace-api/media/rc/lirc-set-send-carrier.rst
new file mode 100644
index 000000000..e3810ba58
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-send-carrier.rst
@@ -0,0 +1,41 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_send_carrier:
+
+***************************
+ioctl LIRC_SET_SEND_CARRIER
+***************************
+
+Name
+====
+
+LIRC_SET_SEND_CARRIER - Set send carrier used to modulate IR TX.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_SET_SEND_CARRIER
+
+``int ioctl(int fd, LIRC_SET_SEND_CARRIER, __u32 *frequency)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``frequency``
+    Frequency of the carrier to be modulated, in Hz.
+
+Description
+===========
+
+Set send carrier used to modulate IR PWM pulses and spaces.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-send-duty-cycle.rst b/Documentation/userspace-api/media/rc/lirc-set-send-duty-cycle.rst
new file mode 100644
index 000000000..52a072529
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-send-duty-cycle.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_send_duty_cycle:
+
+******************************
+ioctl LIRC_SET_SEND_DUTY_CYCLE
+******************************
+
+Name
+====
+
+LIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for
+IR transmit.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_SET_SEND_DUTY_CYCLE
+
+``int ioctl(int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``duty_cycle``
+    Duty cicle, describing the pulse width in percent (from 1 to 99) of
+    the total cycle. Values 0 and 100 are reserved.
+
+Description
+===========
+
+Get/set the duty cycle of the carrier signal for IR transmit.
+
+Currently, no special meaning is defined for 0 or 100, but this
+could be used to switch off carrier generation in the future, so
+these values should be reserved.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-transmitter-mask.rst b/Documentation/userspace-api/media/rc/lirc-set-transmitter-mask.rst
new file mode 100644
index 000000000..68f4cc2e3
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-transmitter-mask.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_transmitter_mask:
+
+*******************************
+ioctl LIRC_SET_TRANSMITTER_MASK
+*******************************
+
+Name
+====
+
+LIRC_SET_TRANSMITTER_MASK - Enables send codes on a given set of transmitters
+
+Synopsis
+========
+
+.. c:macro:: LIRC_SET_TRANSMITTER_MASK
+
+``int ioctl(int fd, LIRC_SET_TRANSMITTER_MASK, __u32 *mask)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``mask``
+    Mask with channels to enable tx. Channel 0 is the least significant bit.
+
+Description
+===========
+
+Some IR TX devices have multiple output channels, in such case,
+:ref:`LIRC_CAN_SET_TRANSMITTER_MASK <LIRC-CAN-SET-TRANSMITTER-MASK>` is
+returned via :ref:`LIRC_GET_FEATURES` and this ioctl sets what channels will
+send IR codes.
+
+This ioctl enables the given set of transmitters. The first transmitter is
+encoded by the least significant bit and so on.
+
+When an invalid bit mask is given, i.e. a bit is set, even though the device
+does not have so many transitters, then this ioctl returns the number of
+available transitters and does nothing otherwise.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-set-wideband-receiver.rst b/Documentation/userspace-api/media/rc/lirc-set-wideband-receiver.rst
new file mode 100644
index 000000000..be5321c4a
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-set-wideband-receiver.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc_set_wideband_receiver:
+
+********************************
+ioctl LIRC_SET_WIDEBAND_RECEIVER
+********************************
+
+Name
+====
+
+LIRC_SET_WIDEBAND_RECEIVER - enable wide band receiver.
+
+Synopsis
+========
+
+.. c:macro:: LIRC_SET_WIDEBAND_RECEIVER
+
+``int ioctl(int fd, LIRC_SET_WIDEBAND_RECEIVER, __u32 *enable)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by open().
+
+``enable``
+    enable = 1 means enable wideband receiver, enable = 0 means disable
+    wideband receiver.
+
+Description
+===========
+
+Some receivers are equipped with special wide band receiver which is
+intended to be used to learn output of existing remote. This ioctl
+allows enabling or disabling it.
+
+This might be useful of receivers that have otherwise narrow band receiver
+that prevents them to be used with some remotes. Wide band receiver might
+also be more precise. On the other hand its disadvantage it usually
+reduced range of reception.
+
+.. note::
+
+    Wide band receiver might be implictly enabled if you enable
+    carrier reports. In that case it will be disabled as soon as you disable
+    carrier reports. Trying to disable wide band receiver while carrier
+    reports are active will do nothing.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/lirc-write.rst b/Documentation/userspace-api/media/rc/lirc-write.rst
new file mode 100644
index 000000000..c1c3230d4
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/lirc-write.rst
@@ -0,0 +1,72 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: RC
+
+.. _lirc-write:
+
+************
+LIRC write()
+************
+
+Name
+====
+
+lirc-write - Write to a LIRC device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: ssize_t write( int fd, void *buf, size_t count )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by ``open()``.
+
+``buf``
+    Buffer with data to be written
+
+``count``
+    Number of bytes at the buffer
+
+Description
+===========
+
+:c:func:`write()` writes up to ``count`` bytes to the device
+referenced by the file descriptor ``fd`` from the buffer starting at
+``buf``.
+
+The exact format of the data depends on what mode a driver is in, use
+:ref:`lirc_get_features` to get the supported modes and use
+:ref:`lirc_set_send_mode` set the mode.
+
+When in :ref:`LIRC_MODE_PULSE <lirc-mode-PULSE>` mode, the data written to
+the chardev is a pulse/space sequence of integer values. Pulses and spaces
+are only marked implicitly by their position. The data must start and end
+with a pulse, therefore, the data must always include an uneven number of
+samples. The write function blocks until the data has been transmitted
+by the hardware. If more data is provided than the hardware can send, the
+driver returns ``EINVAL``.
+
+When in :ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` mode, one
+``struct lirc_scancode`` must be written to the chardev at a time, else
+``EINVAL`` is returned. Set the desired scancode in the ``scancode`` member,
+and the :ref:`IR protocol <Remote_controllers_Protocols>` in the
+:c:type:`rc_proto`: member. All other members must be
+set to 0, else ``EINVAL`` is returned. If there is no protocol encoder
+for the protocol or the scancode is not valid for the specified protocol,
+``EINVAL`` is returned. The write function blocks until the scancode
+is transmitted by the hardware.
+
+Return Value
+============
+
+On success, the number of bytes written is returned. It is not an error if
+this number is smaller than the number of bytes requested, or the amount
+of data required for one frame.  On error, -1 is returned, and the ``errno``
+variable is set appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/rc/rc-intro.rst b/Documentation/userspace-api/media/rc/rc-intro.rst
new file mode 100644
index 000000000..1338478e2
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/rc-intro.rst
@@ -0,0 +1,24 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _Remote_controllers_Intro:
+
+************
+Introduction
+************
+
+Currently, most analog and digital devices have a Infrared input for
+remote controllers. Each manufacturer has their own type of control. It
+is not rare for the same manufacturer to ship different types of
+controls, depending on the device.
+
+A Remote Controller interface is mapped as a normal evdev/input
+interface, just like a keyboard or a mouse. So, it uses all ioctls
+already defined for any other input devices.
+
+However, remove controllers are more flexible than a normal input
+device, as the IR receiver (and/or transmitter) can be used in
+conjunction with a wide variety of different IR remotes.
+
+In order to allow flexibility, the Remote Controller subsystem allows
+controlling the RC-specific attributes via
+:ref:`the sysfs class nodes <remote_controllers_sysfs_nodes>`.
diff --git a/Documentation/userspace-api/media/rc/rc-protos.rst b/Documentation/userspace-api/media/rc/rc-protos.rst
new file mode 100644
index 000000000..2e290584a
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/rc-protos.rst
@@ -0,0 +1,454 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _Remote_controllers_Protocols:
+
+*****************************************
+Remote Controller Protocols and Scancodes
+*****************************************
+
+IR is encoded as a series of pulses and spaces, using a protocol. These
+protocols can encode e.g. an address (which device should respond) and a
+command: what it should do. The values for these are not always consistent
+across different devices for a given protocol.
+
+Therefore out the output of the IR decoder is a scancode; a single u32
+value. Using keymap tables this can be mapped to linux key codes.
+
+Other things can be encoded too. Some IR protocols encode a toggle bit; this
+is to distinguish whether the same button is being held down, or has been
+released and pressed again. If has been released and pressed again, the
+toggle bit will invert from one IR message to the next.
+
+Some remotes have a pointer-type device which can used to control the
+mouse; some air conditioning systems can have their target temperature
+target set in IR.
+
+The following are the protocols the kernel knows about and also lists
+how scancodes are encoded for each protocol.
+
+rc-5 (RC_PROTO_RC5)
+-------------------
+
+This IR protocol uses manchester encoding to encode 14 bits. There is a
+detailed description here https://www.sbprojects.net/knowledge/ir/rc5.php.
+
+The scancode encoding is *not* consistent with the lirc daemon (lircd) rc5
+protocol, or the manchester BPF decoder.
+
+.. flat-table:: rc5 bits scancode mapping
+   :widths:       1 1 2
+
+   * - rc-5 bit
+
+     - scancode bit
+
+     - description
+
+   * - 1
+
+     - none
+
+     - Start bit, always set
+
+   * - 1
+
+     - 6 (inverted)
+
+     - 2nd start bit in rc5,  re-used as 6th command bit
+
+   * - 1
+
+     - none
+
+     - Toggle bit
+
+   * - 5
+
+     - 8 to 13
+
+     - Address
+
+   * - 6
+
+     - 0 to 5
+
+     - Command
+
+There is a variant of rc5 called either rc5x or extended rc5
+where there the second stop bit is the 6th commmand bit, but inverted.
+This is done so it the scancodes and encoding is compatible with existing
+schemes. This bit is stored in bit 6 of the scancode, inverted. This is
+done to keep it compatible with plain rc-5 where there are two start bits.
+
+rc-5-sz (RC_PROTO_RC5_SZ)
+-------------------------
+This is much like rc-5 but one bit longer. The scancode is encoded
+differently.
+
+.. flat-table:: rc-5-sz bits scancode mapping
+   :widths:       1 1 2
+
+   * - rc-5-sz bits
+
+     - scancode bit
+
+     - description
+
+   * - 1
+
+     - none
+
+     - Start bit, always set
+
+   * - 1
+
+     - 13
+
+     - Address bit
+
+   * - 1
+
+     - none
+
+     - Toggle bit
+
+   * - 6
+
+     - 6 to 11
+
+     - Address
+
+   * - 6
+
+     - 0 to 5
+
+     - Command
+
+rc-5x-20 (RC_PROTO_RC5X_20)
+---------------------------
+
+This rc-5 extended to encoded 20 bits. The is a 3555 microseconds space
+after the 8th bit.
+
+.. flat-table:: rc-5x-20 bits scancode mapping
+   :widths:       1 1 2
+
+   * - rc-5-sz bits
+
+     - scancode bit
+
+     - description
+
+   * - 1
+
+     - none
+
+     - Start bit, always set
+
+   * - 1
+
+     - 14
+
+     - Address bit
+
+   * - 1
+
+     - none
+
+     - Toggle bit
+
+   * - 5
+
+     - 16 to 20
+
+     - Address
+
+   * - 6
+
+     - 8 to 13
+
+     - Address
+
+   * - 6
+
+     - 0 to 5
+
+     - Command
+
+
+jvc (RC_PROTO_JVC)
+------------------
+
+The jvc protocol is much like nec, without the inverted values. It is
+described here https://www.sbprojects.net/knowledge/ir/jvc.php.
+
+The scancode is a 16 bits value, where the address is the lower 8 bits
+and the command the higher 8 bits; this is reversed from IR order.
+
+sony-12 (RC_PROTO_SONY12)
+-------------------------
+
+The sony protocol is a pulse-width encoding. There are three variants,
+which just differ in number of bits and scancode encoding.
+
+.. flat-table:: sony-12 bits scancode mapping
+   :widths:       1 1 2
+
+   * - sony-12 bits
+
+     - scancode bit
+
+     - description
+
+   * - 5
+
+     - 16 to 20
+
+     - device
+
+   * - 7
+
+     - 0 to 6
+
+     - function
+
+sony-15 (RC_PROTO_SONY15)
+-------------------------
+
+The sony protocol is a pulse-width encoding. There are three variants,
+which just differ in number of bits and scancode encoding.
+
+.. flat-table:: sony-12 bits scancode mapping
+   :widths:       1 1 2
+
+   * - sony-12 bits
+
+     - scancode bit
+
+     - description
+
+   * - 8
+
+     - 16 to 23
+
+     - device
+
+   * - 7
+
+     - 0 to 6
+
+     - function
+
+sony-20 (RC_PROTO_SONY20)
+-------------------------
+
+The sony protocol is a pulse-width encoding. There are three variants,
+which just differ in number of bits and scancode encoding.
+
+.. flat-table:: sony-20 bits scancode mapping
+   :widths:       1 1 2
+
+   * - sony-20 bits
+
+     - scancode bit
+
+     - description
+
+   * - 5
+
+     - 16 to 20
+
+     - device
+
+   * - 7
+
+     - 0 to 7
+
+     - device
+
+   * - 8
+
+     - 8 to 15
+
+     - extended bits
+
+nec (RC_PROTO_NEC)
+------------------
+
+The nec protocol encodes an 8 bit address and an 8 bit command. It is
+described here https://www.sbprojects.net/knowledge/ir/nec.php. Note
+that the protocol sends least significant bit first.
+
+As a check, the nec protocol sends the address and command twice; the
+second time it is inverted. This is done for verification.
+
+A plain nec IR message has 16 bits; the high 8 bits are the address
+and the low 8 bits are the command.
+
+nec-x (RC_PROTO_NECX)
+---------------------
+
+Extended nec has a 16 bit address and a 8 bit command. This is encoded
+as a 24 bit value as you would expect, with the lower 8 bits the command
+and the upper 16 bits the address.
+
+nec-32 (RC_PROTO_NEC32)
+-----------------------
+
+nec-32 does not send an inverted address or an inverted command; the
+entire message, all 32 bits, are used.
+
+For this to be decoded correctly, the second 8 bits must not be the
+inverted value of the first, and also the last 8 bits must not be the
+inverted value of the third 8 bit value.
+
+The scancode has a somewhat unusual encoding.
+
+.. flat-table:: nec-32 bits scancode mapping
+
+   * - nec-32 bits
+
+     - scancode bit
+
+   * - First 8 bits
+
+     - 16 to 23
+
+   * - Second 8 bits
+
+     - 24 to 31
+
+   * - Third 8 bits
+
+     - 0 to 7
+
+   * - Fourth 8 bits
+
+     - 8 to 15
+
+sanyo (RC_PROTO_SANYO)
+----------------------
+
+The sanyo protocol is like the nec protocol, but with 13 bits address
+rather than 8 bits. Both the address and the command are followed by
+their inverted versions, but these are not present in the scancodes.
+
+Bis 8 to 20 of the scancode is the 13 bits address, and the lower 8
+bits are the command.
+
+mcir2-kbd (RC_PROTO_MCIR2_KBD)
+------------------------------
+
+This protocol is generated by the Microsoft MCE keyboard for keyboard
+events. Refer to the ir-mce_kbd-decoder.c to see how it is encoded.
+
+mcir2-mse (RC_PROTO_MCIR2_MSE)
+------------------------------
+
+This protocol is generated by the Microsoft MCE keyboard for pointer
+events. Refer to the ir-mce_kbd-decoder.c to see how it is encoded.
+
+rc-6-0 (RC_PROTO_RC6_0)
+-----------------------
+
+This is the rc-6 in mode 0. rc-6 is described here
+https://www.sbprojects.net/knowledge/ir/rc6.php.
+The scancode is the exact 16 bits as in the protocol. There is also a
+toggle bit.
+
+rc-6-6a-20 (RC_PROTO_RC6_6A_20)
+-------------------------------
+
+This is the rc-6 in mode 6a, 20 bits. rc-6 is described here
+https://www.sbprojects.net/knowledge/ir/rc6.php.
+The scancode is the exact 20 bits
+as in the protocol. There is also a toggle bit.
+
+rc-6-6a-24 (RC_PROTO_RC6_6A_24)
+-------------------------------
+
+This is the rc-6 in mode 6a, 24 bits. rc-6 is described here
+https://www.sbprojects.net/knowledge/ir/rc6.php.
+The scancode is the exact 24 bits
+as in the protocol. There is also a toggle bit.
+
+rc-6-6a-32 (RC_PROTO_RC6_6A_32)
+-------------------------------
+
+This is the rc-6 in mode 6a, 32 bits. rc-6 is described here
+https://www.sbprojects.net/knowledge/ir/rc6.php.
+The upper 16 bits are the vendor,
+and the lower 16 bits are the vendor-specific bits. This protocol is
+for the non-Microsoft MCE variant (vendor != 0x800f).
+
+
+rc-6-mce (RC_PROTO_RC6_MCE)
+---------------------------
+
+This is the rc-6 in mode 6a, 32 bits. The upper 16 bits are the vendor,
+and the lower 16 bits are the vendor-specific bits. This protocol is
+for the Microsoft MCE variant (vendor = 0x800f). The toggle bit in the
+protocol itself is ignored, and the 16th bit should be takes as the toggle
+bit.
+
+sharp (RC_PROTO_SHARP)
+----------------------
+
+This is a protocol used by Sharp VCRs, is described here
+https://www.sbprojects.net/knowledge/ir/sharp.php. There is a very long
+(40ms) space between the normal and inverted values, and some IR receivers
+cannot decode this.
+
+There is a 5 bit address and a 8 bit command. In the scancode the address is
+in bits 8 to 12, and the command in bits 0 to 7.
+
+xmp (RC_PROTO_XMP)
+------------------
+
+This protocol has several versions and only version 1 is supported. Refer
+to the decoder (ir-xmp-decoder.c) to see how it is encoded.
+
+
+cec (RC_PROTO_CEC)
+------------------
+
+This is not an IR protocol, this is a protocol over CEC. The CEC
+infrastructure uses rc-core for handling CEC commands, so that they
+can easily be remapped.
+
+imon (RC_PROTO_IMON)
+--------------------
+
+This protocol is used by Antec Veris/SoundGraph iMON remotes.
+
+The protocol
+describes both button presses and pointer movements. The protocol encodes
+31 bits, and the scancode is simply the 31 bits with the top bit always 0.
+
+rc-mm-12 (RC_PROTO_RCMM12)
+--------------------------
+
+The rc-mm protocol is described here
+https://www.sbprojects.net/knowledge/ir/rcmm.php. The scancode is simply
+the 12 bits.
+
+rc-mm-24 (RC_PROTO_RCMM24)
+--------------------------
+
+The rc-mm protocol is described here
+https://www.sbprojects.net/knowledge/ir/rcmm.php. The scancode is simply
+the 24 bits.
+
+rc-mm-32 (RC_PROTO_RCMM32)
+--------------------------
+
+The rc-mm protocol is described here
+https://www.sbprojects.net/knowledge/ir/rcmm.php. The scancode is simply
+the 32 bits.
+
+xbox-dvd (RC_PROTO_XBOX_DVD)
+----------------------------
+
+This protocol is used by XBox DVD Remote, which was made for the original
+XBox. There is no in-kernel decoder or encoder for this protocol. The usb
+device decodes the protocol. There is a BPF decoder available in v4l-utils.
diff --git a/Documentation/userspace-api/media/rc/rc-sysfs-nodes.rst b/Documentation/userspace-api/media/rc/rc-sysfs-nodes.rst
new file mode 100644
index 000000000..43c442696
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/rc-sysfs-nodes.rst
@@ -0,0 +1,144 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _remote_controllers_sysfs_nodes:
+
+*******************************
+Remote Controller's sysfs nodes
+*******************************
+
+As defined at ``Documentation/ABI/testing/sysfs-class-rc``, those are
+the sysfs nodes that control the Remote Controllers:
+
+
+.. _sys_class_rc:
+
+/sys/class/rc/
+==============
+
+The ``/sys/class/rc/`` class sub-directory belongs to the Remote
+Controller core and provides a sysfs interface for configuring infrared
+remote controller receivers.
+
+
+.. _sys_class_rc_rcN:
+
+/sys/class/rc/rcN/
+==================
+
+A ``/sys/class/rc/rcN`` directory is created for each remote control
+receiver device where N is the number of the receiver.
+
+
+.. _sys_class_rc_rcN_protocols:
+
+/sys/class/rc/rcN/protocols
+===========================
+
+Reading this file returns a list of available protocols, something like::
+
+	rc5 [rc6] nec jvc [sony]
+
+Enabled protocols are shown in [] brackets.
+
+Writing "+proto" will add a protocol to the list of enabled protocols.
+
+Writing "-proto" will remove a protocol from the list of enabled
+protocols.
+
+Writing "proto" will enable only "proto".
+
+Writing "none" will disable all protocols.
+
+Write fails with ``EINVAL`` if an invalid protocol combination or unknown
+protocol name is used.
+
+
+.. _sys_class_rc_rcN_filter:
+
+/sys/class/rc/rcN/filter
+========================
+
+Sets the scancode filter expected value.
+
+Use in combination with ``/sys/class/rc/rcN/filter_mask`` to set the
+expected value of the bits set in the filter mask. If the hardware
+supports it then scancodes which do not match the filter will be
+ignored. Otherwise the write will fail with an error.
+
+This value may be reset to 0 if the current protocol is altered.
+
+
+.. _sys_class_rc_rcN_filter_mask:
+
+/sys/class/rc/rcN/filter_mask
+=============================
+
+Sets the scancode filter mask of bits to compare. Use in combination
+with ``/sys/class/rc/rcN/filter`` to set the bits of the scancode which
+should be compared against the expected value. A value of 0 disables the
+filter to allow all valid scancodes to be processed.
+
+If the hardware supports it then scancodes which do not match the filter
+will be ignored. Otherwise the write will fail with an error.
+
+This value may be reset to 0 if the current protocol is altered.
+
+
+.. _sys_class_rc_rcN_wakeup_protocols:
+
+/sys/class/rc/rcN/wakeup_protocols
+==================================
+
+Reading this file returns a list of available protocols to use for the
+wakeup filter, something like::
+
+	rc-5 nec nec-x rc-6-0 rc-6-6a-24 [rc-6-6a-32] rc-6-mce
+
+Note that protocol variants are listed, so ``nec``, ``sony``, ``rc-5``, ``rc-6``
+have their different bit length encodings listed if available.
+
+Note that all protocol variants are listed.
+
+The enabled wakeup protocol is shown in [] brackets.
+
+Only one protocol can be selected at a time.
+
+Writing "proto" will use "proto" for wakeup events.
+
+Writing "none" will disable wakeup.
+
+Write fails with ``EINVAL`` if an invalid protocol combination or unknown
+protocol name is used, or if wakeup is not supported by the hardware.
+
+
+.. _sys_class_rc_rcN_wakeup_filter:
+
+/sys/class/rc/rcN/wakeup_filter
+===============================
+
+Sets the scancode wakeup filter expected value. Use in combination with
+``/sys/class/rc/rcN/wakeup_filter_mask`` to set the expected value of
+the bits set in the wakeup filter mask to trigger a system wake event.
+
+If the hardware supports it and wakeup_filter_mask is not 0 then
+scancodes which match the filter will wake the system from e.g. suspend
+to RAM or power off. Otherwise the write will fail with an error.
+
+This value may be reset to 0 if the wakeup protocol is altered.
+
+
+.. _sys_class_rc_rcN_wakeup_filter_mask:
+
+/sys/class/rc/rcN/wakeup_filter_mask
+====================================
+
+Sets the scancode wakeup filter mask of bits to compare. Use in
+combination with ``/sys/class/rc/rcN/wakeup_filter`` to set the bits of
+the scancode which should be compared against the expected value to
+trigger a system wake event.
+
+If the hardware supports it and wakeup_filter_mask is not 0 then
+scancodes which match the filter will wake the system from e.g. suspend
+to RAM or power off. Otherwise the write will fail with an error.
+
+This value may be reset to 0 if the wakeup protocol is altered.
diff --git a/Documentation/userspace-api/media/rc/rc-table-change.rst b/Documentation/userspace-api/media/rc/rc-table-change.rst
new file mode 100644
index 000000000..61c77b080
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/rc-table-change.rst
@@ -0,0 +1,18 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _Remote_controllers_table_change:
+
+*******************************************
+Changing default Remote Controller mappings
+*******************************************
+
+The event interface provides two ioctls to be used against the
+/dev/input/event device, to allow changing the default keymapping.
+
+This program demonstrates how to replace the keymap tables.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    keytable.c
diff --git a/Documentation/userspace-api/media/rc/rc-tables.rst b/Documentation/userspace-api/media/rc/rc-tables.rst
new file mode 100644
index 000000000..8dc11657f
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/rc-tables.rst
@@ -0,0 +1,759 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _Remote_controllers_tables:
+
+************************
+Remote controller tables
+************************
+
+Unfortunately, for several years, there was no effort to create uniform
+IR keycodes for different devices. This caused the same IR keyname to be
+mapped completely differently on different IR devices. This resulted
+that the same IR keyname to be mapped completely different on different
+IR's. Due to that, V4L2 API now specifies a standard for mapping Media
+keys on IR.
+
+This standard should be used by both V4L/DVB drivers and userspace
+applications
+
+The modules register the remote as keyboard within the linux input
+layer. This means that the IR key strokes will look like normal keyboard
+key strokes (if CONFIG_INPUT_KEYBOARD is enabled). Using the event
+devices (CONFIG_INPUT_EVDEV) it is possible for applications to access
+the remote via /dev/input/event devices.
+
+
+.. _rc_standard_keymap:
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: IR default keymapping
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+
+    -  .. row 1
+
+       -  Key code
+
+       -  Meaning
+
+       -  Key examples on IR
+
+    -  .. row 2
+
+       -  **Numeric keys**
+
+    -  .. row 3
+
+       -  ``KEY_NUMERIC_0``
+
+       -  Keyboard digit 0
+
+       -  0
+
+    -  .. row 4
+
+       -  ``KEY_NUMERIC_1``
+
+       -  Keyboard digit 1
+
+       -  1
+
+    -  .. row 5
+
+       -  ``KEY_NUMERIC_2``
+
+       -  Keyboard digit 2
+
+       -  2
+
+    -  .. row 6
+
+       -  ``KEY_NUMERIC_3``
+
+       -  Keyboard digit 3
+
+       -  3
+
+    -  .. row 7
+
+       -  ``KEY_NUMERIC_4``
+
+       -  Keyboard digit 4
+
+       -  4
+
+    -  .. row 8
+
+       -  ``KEY_NUMERIC_5``
+
+       -  Keyboard digit 5
+
+       -  5
+
+    -  .. row 9
+
+       -  ``KEY_NUMERIC_6``
+
+       -  Keyboard digit 6
+
+       -  6
+
+    -  .. row 10
+
+       -  ``KEY_NUMERIC_7``
+
+       -  Keyboard digit 7
+
+       -  7
+
+    -  .. row 11
+
+       -  ``KEY_NUMERIC_8``
+
+       -  Keyboard digit 8
+
+       -  8
+
+    -  .. row 12
+
+       -  ``KEY_NUMERIC_9``
+
+       -  Keyboard digit 9
+
+       -  9
+
+    -  .. row 13
+
+       -  **Movie play control**
+
+    -  .. row 14
+
+       -  ``KEY_FORWARD``
+
+       -  Instantly advance in time
+
+       -  >> / FORWARD
+
+    -  .. row 15
+
+       -  ``KEY_BACK``
+
+       -  Instantly go back in time
+
+       -  <<< / BACK
+
+    -  .. row 16
+
+       -  ``KEY_FASTFORWARD``
+
+       -  Play movie faster
+
+       -  >>> / FORWARD
+
+    -  .. row 17
+
+       -  ``KEY_REWIND``
+
+       -  Play movie back
+
+       -  REWIND / BACKWARD
+
+    -  .. row 18
+
+       -  ``KEY_NEXT``
+
+       -  Select next chapter / sub-chapter / interval
+
+       -  NEXT / SKIP
+
+    -  .. row 19
+
+       -  ``KEY_PREVIOUS``
+
+       -  Select previous chapter / sub-chapter / interval
+
+       -  << / PREV / PREVIOUS
+
+    -  .. row 20
+
+       -  ``KEY_AGAIN``
+
+       -  Repeat the video or a video interval
+
+       -  REPEAT / LOOP / RECALL
+
+    -  .. row 21
+
+       -  ``KEY_PAUSE``
+
+       -  Pause stream
+
+       -  PAUSE / FREEZE
+
+    -  .. row 22
+
+       -  ``KEY_PLAY``
+
+       -  Play movie at the normal timeshift
+
+       -  NORMAL TIMESHIFT / LIVE / >
+
+    -  .. row 23
+
+       -  ``KEY_PLAYPAUSE``
+
+       -  Alternate between play and pause
+
+       -  PLAY / PAUSE
+
+    -  .. row 24
+
+       -  ``KEY_STOP``
+
+       -  Stop stream
+
+       -  STOP
+
+    -  .. row 25
+
+       -  ``KEY_RECORD``
+
+       -  Start/stop recording stream
+
+       -  CAPTURE / REC / RECORD/PAUSE
+
+    -  .. row 26
+
+       -  ``KEY_CAMERA``
+
+       -  Take a picture of the image
+
+       -  CAMERA ICON / CAPTURE / SNAPSHOT
+
+    -  .. row 27
+
+       -  ``KEY_SHUFFLE``
+
+       -  Enable shuffle mode
+
+       -  SHUFFLE
+
+    -  .. row 28
+
+       -  ``KEY_TIME``
+
+       -  Activate time shift mode
+
+       -  TIME SHIFT
+
+    -  .. row 29
+
+       -  ``KEY_TITLE``
+
+       -  Allow changing the chapter
+
+       -  CHAPTER
+
+    -  .. row 30
+
+       -  ``KEY_SUBTITLE``
+
+       -  Allow changing the subtitle
+
+       -  SUBTITLE
+
+    -  .. row 31
+
+       -  **Image control**
+
+    -  .. row 32
+
+       -  ``KEY_BRIGHTNESSDOWN``
+
+       -  Decrease Brightness
+
+       -  BRIGHTNESS DECREASE
+
+    -  .. row 33
+
+       -  ``KEY_BRIGHTNESSUP``
+
+       -  Increase Brightness
+
+       -  BRIGHTNESS INCREASE
+
+    -  .. row 34
+
+       -  ``KEY_ANGLE``
+
+       -  Switch video camera angle (on videos with more than one angle
+	  stored)
+
+       -  ANGLE / SWAP
+
+    -  .. row 35
+
+       -  ``KEY_EPG``
+
+       -  Open the Elecrowonic Play Guide (EPG)
+
+       -  EPG / GUIDE
+
+    -  .. row 36
+
+       -  ``KEY_TEXT``
+
+       -  Activate/change closed caption mode
+
+       -  CLOSED CAPTION/TELETEXT / DVD TEXT / TELETEXT / TTX
+
+    -  .. row 37
+
+       -  **Audio control**
+
+    -  .. row 38
+
+       -  ``KEY_AUDIO``
+
+       -  Change audio source
+
+       -  AUDIO SOURCE / AUDIO / MUSIC
+
+    -  .. row 39
+
+       -  ``KEY_MUTE``
+
+       -  Mute/unmute audio
+
+       -  MUTE / DEMUTE / UNMUTE
+
+    -  .. row 40
+
+       -  ``KEY_VOLUMEDOWN``
+
+       -  Decrease volume
+
+       -  VOLUME- / VOLUME DOWN
+
+    -  .. row 41
+
+       -  ``KEY_VOLUMEUP``
+
+       -  Increase volume
+
+       -  VOLUME+ / VOLUME UP
+
+    -  .. row 42
+
+       -  ``KEY_MODE``
+
+       -  Change sound mode
+
+       -  MONO/STEREO
+
+    -  .. row 43
+
+       -  ``KEY_LANGUAGE``
+
+       -  Select Language
+
+       -  1ST / 2ND LANGUAGE / DVD LANG / MTS/SAP / MTS SEL
+
+    -  .. row 44
+
+       -  **Channel control**
+
+    -  .. row 45
+
+       -  ``KEY_CHANNEL``
+
+       -  Go to the next favorite channel
+
+       -  ALT / CHANNEL / CH SURFING / SURF / FAV
+
+    -  .. row 46
+
+       -  ``KEY_CHANNELDOWN``
+
+       -  Decrease channel sequentially
+
+       -  CHANNEL - / CHANNEL DOWN / DOWN
+
+    -  .. row 47
+
+       -  ``KEY_CHANNELUP``
+
+       -  Increase channel sequentially
+
+       -  CHANNEL + / CHANNEL UP / UP
+
+    -  .. row 48
+
+       -  ``KEY_DIGITS``
+
+       -  Use more than one digit for channel
+
+       -  PLUS / 100/ 1xx / xxx / -/-- / Single Double Triple Digit
+
+    -  .. row 49
+
+       -  ``KEY_SEARCH``
+
+       -  Start channel autoscan
+
+       -  SCAN / AUTOSCAN
+
+    -  .. row 50
+
+       -  **Colored keys**
+
+    -  .. row 51
+
+       -  ``KEY_BLUE``
+
+       -  IR Blue key
+
+       -  BLUE
+
+    -  .. row 52
+
+       -  ``KEY_GREEN``
+
+       -  IR Green Key
+
+       -  GREEN
+
+    -  .. row 53
+
+       -  ``KEY_RED``
+
+       -  IR Red key
+
+       -  RED
+
+    -  .. row 54
+
+       -  ``KEY_YELLOW``
+
+       -  IR Yellow key
+
+       -  YELLOW
+
+    -  .. row 55
+
+       -  **Media selection**
+
+    -  .. row 56
+
+       -  ``KEY_CD``
+
+       -  Change input source to Compact Disc
+
+       -  CD
+
+    -  .. row 57
+
+       -  ``KEY_DVD``
+
+       -  Change input to DVD
+
+       -  DVD / DVD MENU
+
+    -  .. row 58
+
+       -  ``KEY_EJECTCLOSECD``
+
+       -  Open/close the CD/DVD player
+
+       -  -> ) / CLOSE / OPEN
+
+    -  .. row 59
+
+       -  ``KEY_MEDIA``
+
+       -  Turn on/off Media application
+
+       -  PC/TV / TURN ON/OFF APP
+
+    -  .. row 60
+
+       -  ``KEY_PC``
+
+       -  Selects from TV to PC
+
+       -  PC
+
+    -  .. row 61
+
+       -  ``KEY_RADIO``
+
+       -  Put into AM/FM radio mode
+
+       -  RADIO / TV/FM / TV/RADIO / FM / FM/RADIO
+
+    -  .. row 62
+
+       -  ``KEY_TV``
+
+       -  Select tv mode
+
+       -  TV / LIVE TV
+
+    -  .. row 63
+
+       -  ``KEY_TV2``
+
+       -  Select Cable mode
+
+       -  AIR/CBL
+
+    -  .. row 64
+
+       -  ``KEY_VCR``
+
+       -  Select VCR mode
+
+       -  VCR MODE / DTR
+
+    -  .. row 65
+
+       -  ``KEY_VIDEO``
+
+       -  Alternate between input modes
+
+       -  SOURCE / SELECT / DISPLAY / SWITCH INPUTS / VIDEO
+
+    -  .. row 66
+
+       -  **Power control**
+
+    -  .. row 67
+
+       -  ``KEY_POWER``
+
+       -  Turn on/off computer
+
+       -  SYSTEM POWER / COMPUTER POWER
+
+    -  .. row 68
+
+       -  ``KEY_POWER2``
+
+       -  Turn on/off application
+
+       -  TV ON/OFF / POWER
+
+    -  .. row 69
+
+       -  ``KEY_SLEEP``
+
+       -  Activate sleep timer
+
+       -  SLEEP / SLEEP TIMER
+
+    -  .. row 70
+
+       -  ``KEY_SUSPEND``
+
+       -  Put computer into suspend mode
+
+       -  STANDBY / SUSPEND
+
+    -  .. row 71
+
+       -  **Window control**
+
+    -  .. row 72
+
+       -  ``KEY_CLEAR``
+
+       -  Stop stream and return to default input video/audio
+
+       -  CLEAR / RESET / BOSS KEY
+
+    -  .. row 73
+
+       -  ``KEY_CYCLEWINDOWS``
+
+       -  Minimize windows and move to the next one
+
+       -  ALT-TAB / MINIMIZE / DESKTOP
+
+    -  .. row 74
+
+       -  ``KEY_FAVORITES``
+
+       -  Open the favorites stream window
+
+       -  TV WALL / Favorites
+
+    -  .. row 75
+
+       -  ``KEY_MENU``
+
+       -  Call application menu
+
+       -  2ND CONTROLS (USA: MENU) / DVD/MENU / SHOW/HIDE CTRL
+
+    -  .. row 76
+
+       -  ``KEY_NEW``
+
+       -  Open/Close Picture in Picture
+
+       -  PIP
+
+    -  .. row 77
+
+       -  ``KEY_OK``
+
+       -  Send a confirmation code to application
+
+       -  OK / ENTER / RETURN
+
+    -  .. row 78
+
+       -  ``KEY_ASPECT_RATIO``
+
+       -  Select screen aspect ratio
+
+       -  4:3 16:9 SELECT
+
+    -  .. row 79
+
+       -  ``KEY_FULL_SCREEN``
+
+       -  Put device into zoom/full screen mode
+
+       -  ZOOM / FULL SCREEN / ZOOM+ / HIDE PANNEL / SWITCH
+
+    -  .. row 80
+
+       -  **Navigation keys**
+
+    -  .. row 81
+
+       -  ``KEY_ESC``
+
+       -  Cancel current operation
+
+       -  CANCEL / BACK
+
+    -  .. row 82
+
+       -  ``KEY_HELP``
+
+       -  Open a Help window
+
+       -  HELP
+
+    -  .. row 83
+
+       -  ``KEY_HOMEPAGE``
+
+       -  Navigate to Homepage
+
+       -  HOME
+
+    -  .. row 84
+
+       -  ``KEY_INFO``
+
+       -  Open On Screen Display
+
+       -  DISPLAY INFORMATION / OSD
+
+    -  .. row 85
+
+       -  ``KEY_WWW``
+
+       -  Open the default browser
+
+       -  WEB
+
+    -  .. row 86
+
+       -  ``KEY_UP``
+
+       -  Up key
+
+       -  UP
+
+    -  .. row 87
+
+       -  ``KEY_DOWN``
+
+       -  Down key
+
+       -  DOWN
+
+    -  .. row 88
+
+       -  ``KEY_LEFT``
+
+       -  Left key
+
+       -  LEFT
+
+    -  .. row 89
+
+       -  ``KEY_RIGHT``
+
+       -  Right key
+
+       -  RIGHT
+
+    -  .. row 90
+
+       -  **Miscellaneous keys**
+
+    -  .. row 91
+
+       -  ``KEY_DOT``
+
+       -  Return a dot
+
+       -  .
+
+    -  .. row 92
+
+       -  ``KEY_FN``
+
+       -  Select a function
+
+       -  FUNCTION
+
+
+It should be noted that, sometimes, there some fundamental missing keys
+at some cheaper IR's. Due to that, it is recommended to:
+
+
+.. _rc_keymap_notes:
+
+.. flat-table:: Notes
+    :header-rows:  0
+    :stub-columns: 0
+
+
+    -  .. row 1
+
+       -  On simpler IR's, without separate channel keys, you need to map UP
+	  as ``KEY_CHANNELUP``
+
+    -  .. row 2
+
+       -  On simpler IR's, without separate channel keys, you need to map
+	  DOWN as ``KEY_CHANNELDOWN``
+
+    -  .. row 3
+
+       -  On simpler IR's, without separate volume keys, you need to map
+	  LEFT as ``KEY_VOLUMEDOWN``
+
+    -  .. row 4
+
+       -  On simpler IR's, without separate volume keys, you need to map
+	  RIGHT as ``KEY_VOLUMEUP``
diff --git a/Documentation/userspace-api/media/rc/remote_controllers.rst b/Documentation/userspace-api/media/rc/remote_controllers.rst
new file mode 100644
index 000000000..2d9078acc
--- /dev/null
+++ b/Documentation/userspace-api/media/rc/remote_controllers.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. include:: <isonum.txt>
+
+.. _remote_controllers:
+
+################################
+Part III - Remote Controller API
+################################
+
+.. only:: html
+
+   .. class:: toc-title
+
+        Table of Contents
+
+.. toctree::
+    :maxdepth: 5
+    :numbered:
+
+    rc-intro
+    rc-sysfs-nodes
+    rc-protos
+    rc-tables
+    rc-table-change
+    lirc-dev
+
+
+**********************
+Revision and Copyright
+**********************
+
+Authors:
+
+- Carvalho Chehab, Mauro <mchehab@kernel.org>
+
+ - Initial version.
+
+**Copyright** |copy| 2009-2016 : Mauro Carvalho Chehab
+
+****************
+Revision History
+****************
+
+:revision: 3.15 / 2014-02-06 (*mcc*)
+
+Added the interface description and the RC sysfs class description.
+
+
+:revision: 1.0 / 2009-09-06 (*mcc*)
+
+Initial revision
diff --git a/Documentation/userspace-api/media/typical_media_device.svg b/Documentation/userspace-api/media/typical_media_device.svg
new file mode 100644
index 000000000..fca7af8e4
--- /dev/null
+++ b/Documentation/userspace-api/media/typical_media_device.svg
@@ -0,0 +1,107 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later -->
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diff --git a/Documentation/userspace-api/media/v4l/app-pri.rst b/Documentation/userspace-api/media/v4l/app-pri.rst
new file mode 100644
index 000000000..626a42f2e
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/app-pri.rst
@@ -0,0 +1,30 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _app-pri:
+
+********************
+Application Priority
+********************
+
+When multiple applications share a device it may be desirable to assign
+them different priorities. Contrary to the traditional "rm -rf /" school
+of thought, a video recording application could for example block other
+applications from changing video controls or switching the current TV
+channel. Another objective is to permit low priority applications
+working in background, which can be preempted by user controlled
+applications and automatically regain control of the device at a later
+time.
+
+Since these features cannot be implemented entirely in user space V4L2
+defines the :ref:`VIDIOC_G_PRIORITY <VIDIOC_G_PRIORITY>` and
+:ref:`VIDIOC_S_PRIORITY <VIDIOC_G_PRIORITY>` ioctls to request and
+query the access priority associate with a file descriptor. Opening a
+device assigns a medium priority, compatible with earlier versions of
+V4L2 and drivers not supporting these ioctls. Applications requiring a
+different priority will usually call :ref:`VIDIOC_S_PRIORITY
+<VIDIOC_G_PRIORITY>` after verifying the device with the
+:ref:`VIDIOC_QUERYCAP` ioctl.
+
+Ioctls changing driver properties, such as
+:ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>`, return an ``EBUSY`` error code
+after another application obtained higher priority.
diff --git a/Documentation/userspace-api/media/v4l/async.rst b/Documentation/userspace-api/media/v4l/async.rst
new file mode 100644
index 000000000..d6960ff5c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/async.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _async:
+
+****************
+Asynchronous I/O
+****************
+
+This method is not defined yet.
diff --git a/Documentation/userspace-api/media/v4l/audio.rst b/Documentation/userspace-api/media/v4l/audio.rst
new file mode 100644
index 000000000..17f0b1c89
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/audio.rst
@@ -0,0 +1,97 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _audio:
+
+************************
+Audio Inputs and Outputs
+************************
+
+Audio inputs and outputs are physical connectors of a device. Video
+capture devices have inputs, output devices have outputs, zero or more
+each. Radio devices have no audio inputs or outputs. They have exactly
+one tuner which in fact *is* an audio source, but this API associates
+tuners with video inputs or outputs only, and radio devices have none of
+these. [#f1]_ A connector on a TV card to loop back the received audio
+signal to a sound card is not considered an audio output.
+
+Audio and video inputs and outputs are associated. Selecting a video
+source also selects an audio source. This is most evident when the video
+and audio source is a tuner. Further audio connectors can combine with
+more than one video input or output. Assumed two composite video inputs
+and two audio inputs exist, there may be up to four valid combinations.
+The relation of video and audio connectors is defined in the
+``audioset`` field of the respective struct
+:c:type:`v4l2_input` or struct
+:c:type:`v4l2_output`, where each bit represents the index
+number, starting at zero, of one audio input or output.
+
+To learn about the number and attributes of the available inputs and
+outputs applications can enumerate them with the
+:ref:`VIDIOC_ENUMAUDIO` and
+:ref:`VIDIOC_ENUMAUDOUT <VIDIOC_ENUMAUDOUT>` ioctl, respectively.
+The struct :c:type:`v4l2_audio` returned by the
+:ref:`VIDIOC_ENUMAUDIO` ioctl also contains signal
+status information applicable when the current audio input is queried.
+
+The :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` and
+:ref:`VIDIOC_G_AUDOUT <VIDIOC_G_AUDOUT>` ioctls report the current
+audio input and output, respectively.
+
+.. note::
+
+   Note that, unlike :ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` and
+   :ref:`VIDIOC_G_OUTPUT <VIDIOC_G_OUTPUT>` these ioctls return a
+   structure as :ref:`VIDIOC_ENUMAUDIO` and
+   :ref:`VIDIOC_ENUMAUDOUT <VIDIOC_ENUMAUDOUT>` do, not just an index.
+
+To select an audio input and change its properties applications call the
+:ref:`VIDIOC_S_AUDIO <VIDIOC_G_AUDIO>` ioctl. To select an audio
+output (which presently has no changeable properties) applications call
+the :ref:`VIDIOC_S_AUDOUT <VIDIOC_G_AUDOUT>` ioctl.
+
+Drivers must implement all audio input ioctls when the device has
+multiple selectable audio inputs, all audio output ioctls when the
+device has multiple selectable audio outputs. When the device has any
+audio inputs or outputs the driver must set the ``V4L2_CAP_AUDIO`` flag
+in the struct :c:type:`v4l2_capability` returned by
+the :ref:`VIDIOC_QUERYCAP` ioctl.
+
+
+Example: Information about the current audio input
+==================================================
+
+.. code-block:: c
+
+    struct v4l2_audio audio;
+
+    memset(&audio, 0, sizeof(audio));
+
+    if (-1 == ioctl(fd, VIDIOC_G_AUDIO, &audio)) {
+	perror("VIDIOC_G_AUDIO");
+	exit(EXIT_FAILURE);
+    }
+
+    printf("Current input: %s\\n", audio.name);
+
+
+Example: Switching to the first audio input
+===========================================
+
+.. code-block:: c
+
+    struct v4l2_audio audio;
+
+    memset(&audio, 0, sizeof(audio)); /* clear audio.mode, audio.reserved */
+
+    audio.index = 0;
+
+    if (-1 == ioctl(fd, VIDIOC_S_AUDIO, &audio)) {
+	perror("VIDIOC_S_AUDIO");
+	exit(EXIT_FAILURE);
+    }
+
+.. [#f1]
+   Actually struct :c:type:`v4l2_audio` ought to have a
+   ``tuner`` field like struct :c:type:`v4l2_input`, not
+   only making the API more consistent but also permitting radio devices
+   with multiple tuners.
diff --git a/Documentation/userspace-api/media/v4l/bayer.svg b/Documentation/userspace-api/media/v4l/bayer.svg
new file mode 100644
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diff --git a/Documentation/userspace-api/media/v4l/biblio.rst b/Documentation/userspace-api/media/v4l/biblio.rst
new file mode 100644
index 000000000..7869b6f6f
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/biblio.rst
@@ -0,0 +1,409 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+**********
+References
+**********
+
+
+.. _cea608:
+
+CEA 608-E
+=========
+
+
+:title:     CEA-608-E R-2014 "Line 21 Data Services"
+
+:author:    Consumer Electronics Association (http://www.ce.org)
+
+.. _en300294:
+
+EN 300 294
+==========
+
+
+:title:     EN 300 294 "625-line television Wide Screen Signalling (WSS)"
+
+:author:    European Telecommunication Standards Institute (http://www.etsi.org)
+
+.. _ets300231:
+
+ETS 300 231
+===========
+
+
+:title:     ETS 300 231 "Specification of the domestic video Programme Delivery Control system (PDC)"
+
+:author:    European Telecommunication Standards Institute (http://www.etsi.org)
+
+.. _ets300706:
+
+ETS 300 706
+===========
+
+
+:title:     ETS 300 706 "Enhanced Teletext specification"
+
+:author:    European Telecommunication Standards Institute (http://www.etsi.org)
+
+.. _mpeg2part1:
+
+ISO 13818-1
+===========
+
+
+:title:     ITU-T Rec. H.222.0 | ISO/IEC 13818-1 "Information technology — Generic coding of moving pictures and associated audio information: Systems"
+
+:author:    International Telecommunication Union (http://www.itu.ch), International Organisation for Standardisation (http://www.iso.ch)
+
+.. _mpeg2part2:
+
+ISO 13818-2
+===========
+
+
+:title:     ITU-T Rec. H.262 | ISO/IEC 13818-2 "Information technology — Generic coding of moving pictures and associated audio information: Video"
+
+:author:    International Telecommunication Union (http://www.itu.ch), International Organisation for Standardisation (http://www.iso.ch)
+
+.. _itu470:
+
+ITU BT.470
+==========
+
+
+:title:     ITU-R Recommendation BT.470-6 "Conventional Television Systems"
+
+:author:    International Telecommunication Union (http://www.itu.ch)
+
+.. _itu601:
+
+ITU BT.601
+==========
+
+
+:title:     ITU-R Recommendation BT.601-5 "Studio Encoding Parameters of Digital Television for Standard 4:3 and Wide-Screen 16:9 Aspect Ratios"
+
+:author:    International Telecommunication Union (http://www.itu.ch)
+
+.. _itu653:
+
+ITU BT.653
+==========
+
+
+:title:     ITU-R Recommendation BT.653-3 "Teletext systems"
+
+:author:    International Telecommunication Union (http://www.itu.ch)
+
+.. _itu709:
+
+ITU BT.709
+==========
+
+
+:title:     ITU-R Recommendation BT.709-5 "Parameter values for the HDTV standards for production and international programme exchange"
+
+:author:    International Telecommunication Union (http://www.itu.ch)
+
+.. _itu1119:
+
+ITU BT.1119
+===========
+
+
+:title:     ITU-R Recommendation BT.1119 "625-line television Wide Screen Signalling (WSS)"
+
+:author:    International Telecommunication Union (http://www.itu.ch)
+
+.. _h264:
+
+ITU-T Rec. H.264 Specification (04/2017 Edition)
+================================================
+
+:title:     ITU-T Recommendation H.264 "Advanced Video Coding for Generic Audiovisual Services"
+
+:author:    International Telecommunication Union (http://www.itu.ch)
+
+.. _hevc:
+
+ITU H.265/HEVC
+==============
+
+:title:     ITU-T Rec. H.265 | ISO/IEC 23008-2 "High Efficiency Video Coding"
+
+:author:    International Telecommunication Union (http://www.itu.ch), International Organisation for Standardisation (http://www.iso.ch)
+
+.. _jfif:
+
+JFIF
+====
+
+
+:title:     JPEG File Interchange Format
+:subtitle:  Version 1.02
+
+:author:    Independent JPEG Group (http://www.ijg.org)
+
+.. _itu-t81:
+
+ITU-T.81
+========
+
+
+:title:     ITU-T Recommendation T.81 "Information Technology — Digital Compression and Coding of Continous-Tone Still Images — Requirements and Guidelines"
+
+:author:    International Telecommunication Union (http://www.itu.int)
+
+.. _w3c-jpeg-jfif:
+
+W3C JPEG JFIF
+=============
+
+
+:title:     JPEG JFIF
+
+:author:    The World Wide Web Consortium (http://www.w3.org)
+
+.. _smpte12m:
+
+SMPTE 12M
+=========
+
+
+:title:     SMPTE 12M-1999 "Television, Audio and Film - Time and Control Code"
+
+:author:    Society of Motion Picture and Television Engineers (http://www.smpte.org)
+
+.. _smpte170m:
+
+SMPTE 170M
+==========
+
+
+:title:     SMPTE 170M-1999 "Television - Composite Analog Video Signal - NTSC for Studio Applications"
+
+:author:    Society of Motion Picture and Television Engineers (http://www.smpte.org)
+
+.. _smpte240m:
+
+SMPTE 240M
+==========
+
+
+:title:     SMPTE 240M-1999 "Television - Signal Parameters - 1125-Line High-Definition Production"
+
+:author:    Society of Motion Picture and Television Engineers (http://www.smpte.org)
+
+.. _smpte431:
+
+SMPTE RP 431-2
+==============
+
+
+:title:     SMPTE RP 431-2:2011 "D-Cinema Quality - Reference Projector and Environment"
+
+:author:    Society of Motion Picture and Television Engineers (http://www.smpte.org)
+
+.. _smpte2084:
+
+SMPTE ST 2084
+=============
+
+
+:title:     SMPTE ST 2084:2014 "High Dynamic Range Electro-Optical Transfer Function of Master Reference Displays"
+
+:author:    Society of Motion Picture and Television Engineers (http://www.smpte.org)
+
+.. _srgb:
+
+sRGB
+====
+
+
+:title:     IEC 61966-2-1 ed1.0 "Multimedia systems and equipment - Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sRGB"
+
+:author:    International Electrotechnical Commission (http://www.iec.ch)
+
+.. _sycc:
+
+sYCC
+====
+
+
+:title:     IEC 61966-2-1-am1 ed1.0 "Amendment 1 - Multimedia systems and equipment - Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sRGB"
+
+:author:    International Electrotechnical Commission (http://www.iec.ch)
+
+.. _xvycc:
+
+xvYCC
+=====
+
+
+:title:     IEC 61966-2-4 ed1.0 "Multimedia systems and equipment - Colour measurement and management - Part 2-4: Colour management - Extended-gamut YCC colour space for video applications - xvYCC"
+
+:author:    International Electrotechnical Commission (http://www.iec.ch)
+
+.. _oprgb:
+
+opRGB
+=====
+
+
+:title:     IEC 61966-2-5 "Multimedia systems and equipment - Colour measurement and management - Part 2-5: Colour management - Optional RGB colour space - opRGB"
+
+:author:    International Electrotechnical Commission (http://www.iec.ch)
+
+.. _itu2020:
+
+ITU BT.2020
+===========
+
+
+:title:     ITU-R Recommendation BT.2020 (08/2012) "Parameter values for ultra-high definition television systems for production and international programme exchange"
+
+:author:    International Telecommunication Union (http://www.itu.ch)
+
+.. _tech3213:
+
+EBU Tech 3213
+=============
+
+
+:title:     E.B.U. Standard for Chromaticity Tolerances for Studio Monitors"
+
+:author:    European Broadcast Union (http://www.ebu.ch)
+
+.. _iec62106:
+
+IEC 62106
+=========
+
+
+:title:     Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the frequency range from 87,5 to 108,0 MHz
+
+:author:    International Electrotechnical Commission (http://www.iec.ch)
+
+.. _nrsc4:
+
+NRSC-4-B
+========
+
+
+:title:     NRSC-4-B: United States RBDS Standard
+
+:author:    National Radio Systems Committee (http://www.nrscstandards.org)
+
+.. _iso12232:
+
+ISO 12232:2006
+==============
+
+
+:title:     Photography — Digital still cameras — Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index
+
+:author:    International Organization for Standardization (http://www.iso.org)
+
+.. _cea861:
+
+CEA-861-E
+=========
+
+
+:title:     A DTV Profile for Uncompressed High Speed Digital Interfaces
+
+:author:    Consumer Electronics Association (http://www.ce.org)
+
+.. _vesadmt:
+
+VESA DMT
+========
+
+
+:title:     VESA and Industry Standards and Guidelines for Computer Display Monitor Timing (DMT)
+
+:author:    Video Electronics Standards Association (http://www.vesa.org)
+
+.. _vesaedid:
+
+EDID
+====
+
+
+:title:     VESA Enhanced Extended Display Identification Data Standard
+:subtitle:  Release A, Revision 2
+
+:author:    Video Electronics Standards Association (http://www.vesa.org)
+
+.. _hdcp:
+
+HDCP
+====
+
+
+:title:     High-bandwidth Digital Content Protection System
+:subtitle:  Revision 1.3
+
+:author:    Digital Content Protection LLC (http://www.digital-cp.com)
+
+.. _hdmi:
+
+HDMI
+====
+
+
+:title:     High-Definition Multimedia Interface
+:subtitle:  Specification Version 1.4a
+
+:author:    HDMI Licensing LLC (http://www.hdmi.org)
+
+.. _hdmi2:
+
+HDMI2
+=====
+
+:title:     High-Definition Multimedia Interface
+:subtitle:  Specification Version 2.0
+
+:author:    HDMI Licensing LLC (http://www.hdmi.org)
+
+.. _dp:
+
+DP
+==
+
+
+:title:     VESA DisplayPort Standard
+:subtitle:  Version 1, Revision 2
+
+:author:    Video Electronics Standards Association (http://www.vesa.org)
+
+.. _poynton:
+
+poynton
+=======
+
+
+:title:     Digital Video and HDTV, Algorithms and Interfaces
+
+:author:    Charles Poynton
+
+.. _colimg:
+
+colimg
+======
+
+
+:title:     Color Imaging: Fundamentals and Applications
+
+:author:    Erik Reinhard et al.
+
+.. _vp8:
+
+VP8
+===
+
+
+:title:     RFC 6386: "VP8 Data Format and Decoding Guide"
+
+:author:    J. Bankoski et al.
diff --git a/Documentation/userspace-api/media/v4l/buffer.rst b/Documentation/userspace-api/media/v4l/buffer.rst
new file mode 100644
index 000000000..7dbdfbb4a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/buffer.rst
@@ -0,0 +1,807 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _buffer:
+
+*******
+Buffers
+*******
+
+A buffer contains data exchanged by application and driver using one of
+the Streaming I/O methods. In the multi-planar API, the data is held in
+planes, while the buffer structure acts as a container for the planes.
+Only pointers to buffers (planes) are exchanged, the data itself is not
+copied. These pointers, together with meta-information like timestamps
+or field parity, are stored in a struct :c:type:`v4l2_buffer`,
+argument to the :ref:`VIDIOC_QUERYBUF`,
+:ref:`VIDIOC_QBUF <VIDIOC_QBUF>` and
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. In the multi-planar API,
+some plane-specific members of struct :c:type:`v4l2_buffer`,
+such as pointers and sizes for each plane, are stored in
+struct :c:type:`v4l2_plane` instead. In that case,
+struct :c:type:`v4l2_buffer` contains an array of plane structures.
+
+Dequeued video buffers come with timestamps. The driver decides at which
+part of the frame and with which clock the timestamp is taken. Please
+see flags in the masks ``V4L2_BUF_FLAG_TIMESTAMP_MASK`` and
+``V4L2_BUF_FLAG_TSTAMP_SRC_MASK`` in :ref:`buffer-flags`. These flags
+are always valid and constant across all buffers during the whole video
+stream. Changes in these flags may take place as a side effect of
+:ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>` or
+:ref:`VIDIOC_S_OUTPUT <VIDIOC_G_OUTPUT>` however. The
+``V4L2_BUF_FLAG_TIMESTAMP_COPY`` timestamp type which is used by e.g. on
+mem-to-mem devices is an exception to the rule: the timestamp source
+flags are copied from the OUTPUT video buffer to the CAPTURE video
+buffer.
+
+Interactions between formats, controls and buffers
+==================================================
+
+V4L2 exposes parameters that influence the buffer size, or the way data is
+laid out in the buffer. Those parameters are exposed through both formats and
+controls. One example of such a control is the ``V4L2_CID_ROTATE`` control
+that modifies the direction in which pixels are stored in the buffer, as well
+as the buffer size when the selected format includes padding at the end of
+lines.
+
+The set of information needed to interpret the content of a buffer (e.g. the
+pixel format, the line stride, the tiling orientation or the rotation) is
+collectively referred to in the rest of this section as the buffer layout.
+
+Controls that can modify the buffer layout shall set the
+``V4L2_CTRL_FLAG_MODIFY_LAYOUT`` flag.
+
+Modifying formats or controls that influence the buffer size or layout require
+the stream to be stopped. Any attempt at such a modification while the stream
+is active shall cause the ioctl setting the format or the control to return
+the ``EBUSY`` error code. In that case drivers shall also set the
+``V4L2_CTRL_FLAG_GRABBED`` flag when calling
+:c:func:`VIDIOC_QUERYCTRL` or :c:func:`VIDIOC_QUERY_EXT_CTRL` for such a
+control while the stream is active.
+
+.. note::
+
+   The :c:func:`VIDIOC_S_SELECTION` ioctl can, depending on the hardware (for
+   instance if the device doesn't include a scaler), modify the format in
+   addition to the selection rectangle. Similarly, the
+   :c:func:`VIDIOC_S_INPUT`, :c:func:`VIDIOC_S_OUTPUT`, :c:func:`VIDIOC_S_STD`
+   and :c:func:`VIDIOC_S_DV_TIMINGS` ioctls can also modify the format and
+   selection rectangles. When those ioctls result in a buffer size or layout
+   change, drivers shall handle that condition as they would handle it in the
+   :c:func:`VIDIOC_S_FMT` ioctl in all cases described in this section.
+
+Controls that only influence the buffer layout can be modified at any time
+when the stream is stopped. As they don't influence the buffer size, no
+special handling is needed to synchronize those controls with buffer
+allocation and the ``V4L2_CTRL_FLAG_GRABBED`` flag is cleared once the
+stream is stopped.
+
+Formats and controls that influence the buffer size interact with buffer
+allocation. The simplest way to handle this is for drivers to always require
+buffers to be reallocated in order to change those formats or controls. In
+that case, to perform such changes, userspace applications shall first stop
+the video stream with the :c:func:`VIDIOC_STREAMOFF` ioctl if it is running
+and free all buffers with the :c:func:`VIDIOC_REQBUFS` ioctl if they are
+allocated. After freeing all buffers the ``V4L2_CTRL_FLAG_GRABBED`` flag
+for controls is cleared. The format or controls can then be modified, and
+buffers shall then be reallocated and the stream restarted. A typical ioctl
+sequence is
+
+ #. VIDIOC_STREAMOFF
+ #. VIDIOC_REQBUFS(0)
+ #. VIDIOC_S_EXT_CTRLS
+ #. VIDIOC_S_FMT
+ #. VIDIOC_REQBUFS(n)
+ #. VIDIOC_QBUF
+ #. VIDIOC_STREAMON
+
+The second :c:func:`VIDIOC_REQBUFS` call will take the new format and control
+value into account to compute the buffer size to allocate. Applications can
+also retrieve the size by calling the :c:func:`VIDIOC_G_FMT` ioctl if needed.
+
+.. note::
+
+   The API doesn't mandate the above order for control (3.) and format (4.)
+   changes. Format and controls can be set in a different order, or even
+   interleaved, depending on the device and use case. For instance some
+   controls might behave differently for different pixel formats, in which
+   case the format might need to be set first.
+
+When reallocation is required, any attempt to modify format or controls that
+influences the buffer size while buffers are allocated shall cause the format
+or control set ioctl to return the ``EBUSY`` error. Any attempt to queue a
+buffer too small for the current format or controls shall cause the
+:c:func:`VIDIOC_QBUF` ioctl to return a ``EINVAL`` error.
+
+Buffer reallocation is an expensive operation. To avoid that cost, drivers can
+(and are encouraged to) allow format or controls that influence the buffer
+size to be changed with buffers allocated. In that case, a typical ioctl
+sequence to modify format and controls is
+
+ #. VIDIOC_STREAMOFF
+ #. VIDIOC_S_EXT_CTRLS
+ #. VIDIOC_S_FMT
+ #. VIDIOC_QBUF
+ #. VIDIOC_STREAMON
+
+For this sequence to operate correctly, queued buffers need to be large enough
+for the new format or controls. Drivers shall return a ``ENOSPC`` error in
+response to format change (:c:func:`VIDIOC_S_FMT`) or control changes
+(:c:func:`VIDIOC_S_CTRL` or :c:func:`VIDIOC_S_EXT_CTRLS`) if buffers too small
+for the new format are currently queued. As a simplification, drivers are
+allowed to return a ``EBUSY`` error from these ioctls if any buffer is
+currently queued, without checking the queued buffers sizes.
+
+Additionally, drivers shall return a ``EINVAL`` error from the
+:c:func:`VIDIOC_QBUF` ioctl if the buffer being queued is too small for the
+current format or controls. Together, these requirements ensure that queued
+buffers will always be large enough for the configured format and controls.
+
+Userspace applications can query the buffer size required for a given format
+and controls by first setting the desired control values and then trying the
+desired format. The :c:func:`VIDIOC_TRY_FMT` ioctl will return the required
+buffer size.
+
+ #. VIDIOC_S_EXT_CTRLS(x)
+ #. VIDIOC_TRY_FMT()
+ #. VIDIOC_S_EXT_CTRLS(y)
+ #. VIDIOC_TRY_FMT()
+
+The :c:func:`VIDIOC_CREATE_BUFS` ioctl can then be used to allocate buffers
+based on the queried sizes (for instance by allocating a set of buffers large
+enough for all the desired formats and controls, or by allocating separate set
+of appropriately sized buffers for each use case).
+
+.. c:type:: v4l2_buffer
+
+struct v4l2_buffer
+==================
+
+.. tabularcolumns:: |p{2.8cm}|p{2.5cm}|p{1.6cm}|p{10.2cm}|
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_buffer
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 2 10
+
+    * - __u32
+      - ``index``
+      - Number of the buffer, set by the application except when calling
+	:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, then it is set by the
+	driver. This field can range from zero to the number of buffers
+	allocated with the :ref:`VIDIOC_REQBUFS` ioctl
+	(struct :c:type:`v4l2_requestbuffers`
+	``count``), plus any buffers allocated with
+	:ref:`VIDIOC_CREATE_BUFS` minus one.
+    * - __u32
+      - ``type``
+      - Type of the buffer, same as struct
+	:c:type:`v4l2_format` ``type`` or struct
+	:c:type:`v4l2_requestbuffers` ``type``, set
+	by the application. See :c:type:`v4l2_buf_type`
+    * - __u32
+      - ``bytesused``
+      - The number of bytes occupied by the data in the buffer. It depends
+	on the negotiated data format and may change with each buffer for
+	compressed variable size data like JPEG images. Drivers must set
+	this field when ``type`` refers to a capture stream, applications
+	when it refers to an output stream. If the application sets this
+	to 0 for an output stream, then ``bytesused`` will be set to the
+	size of the buffer (see the ``length`` field of this struct) by
+	the driver. For multiplanar formats this field is ignored and the
+	``planes`` pointer is used instead.
+    * - __u32
+      - ``flags``
+      - Flags set by the application or driver, see :ref:`buffer-flags`.
+    * - __u32
+      - ``field``
+      - Indicates the field order of the image in the buffer, see
+	:c:type:`v4l2_field`. This field is not used when the buffer
+	contains VBI data. Drivers must set it when ``type`` refers to a
+	capture stream, applications when it refers to an output stream.
+    * - struct timeval
+      - ``timestamp``
+      - For capture streams this is time when the first data byte was
+	captured, as returned by the :c:func:`clock_gettime()` function
+	for the relevant clock id; see ``V4L2_BUF_FLAG_TIMESTAMP_*`` in
+	:ref:`buffer-flags`. For output streams the driver stores the
+	time at which the last data byte was actually sent out in the
+	``timestamp`` field. This permits applications to monitor the
+	drift between the video and system clock. For output streams that
+	use ``V4L2_BUF_FLAG_TIMESTAMP_COPY`` the application has to fill
+	in the timestamp which will be copied by the driver to the capture
+	stream.
+    * - struct :c:type:`v4l2_timecode`
+      - ``timecode``
+      - When the ``V4L2_BUF_FLAG_TIMECODE`` flag is set in ``flags``, this
+	structure contains a frame timecode. In
+	:c:type:`V4L2_FIELD_ALTERNATE <v4l2_field>` mode the top and
+	bottom field contain the same timecode. Timecodes are intended to
+	help video editing and are typically recorded on video tapes, but
+	also embedded in compressed formats like MPEG. This field is
+	independent of the ``timestamp`` and ``sequence`` fields.
+    * - __u32
+      - ``sequence``
+      - Set by the driver, counting the frames (not fields!) in sequence.
+	This field is set for both input and output devices.
+    * - :cspan:`2`
+
+	In :c:type:`V4L2_FIELD_ALTERNATE <v4l2_field>` mode the top and
+	bottom field have the same sequence number. The count starts at
+	zero and includes dropped or repeated frames. A dropped frame was
+	received by an input device but could not be stored due to lack of
+	free buffer space. A repeated frame was displayed again by an
+	output device because the application did not pass new data in
+	time.
+
+	.. note::
+
+	   This may count the frames received e.g. over USB, without
+	   taking into account the frames dropped by the remote hardware due
+	   to limited compression throughput or bus bandwidth. These devices
+	   identify by not enumerating any video standards, see
+	   :ref:`standard`.
+
+    * - __u32
+      - ``memory``
+      - This field must be set by applications and/or drivers in
+	accordance with the selected I/O method. See :c:type:`v4l2_memory`
+    * - union {
+      - ``m``
+    * - __u32
+      - ``offset``
+      - For the single-planar API and when ``memory`` is
+	``V4L2_MEMORY_MMAP`` this is the offset of the buffer from the
+	start of the device memory. The value is returned by the driver
+	and apart of serving as parameter to the
+	:c:func:`mmap()` function not useful for applications.
+	See :ref:`mmap` for details
+    * - unsigned long
+      - ``userptr``
+      - For the single-planar API and when ``memory`` is
+	``V4L2_MEMORY_USERPTR`` this is a pointer to the buffer (casted to
+	unsigned long type) in virtual memory, set by the application. See
+	:ref:`userp` for details.
+    * - struct v4l2_plane
+      - ``*planes``
+      - When using the multi-planar API, contains a userspace pointer to
+	an array of struct :c:type:`v4l2_plane`. The size of
+	the array should be put in the ``length`` field of this
+	struct :c:type:`v4l2_buffer` structure.
+    * - int
+      - ``fd``
+      - For the single-plane API and when ``memory`` is
+	``V4L2_MEMORY_DMABUF`` this is the file descriptor associated with
+	a DMABUF buffer.
+    * - }
+      -
+    * - __u32
+      - ``length``
+      - Size of the buffer (not the payload) in bytes for the
+	single-planar API. This is set by the driver based on the calls to
+	:ref:`VIDIOC_REQBUFS` and/or
+	:ref:`VIDIOC_CREATE_BUFS`. For the
+	multi-planar API the application sets this to the number of
+	elements in the ``planes`` array. The driver will fill in the
+	actual number of valid elements in that array.
+    * - __u32
+      - ``reserved2``
+      - A place holder for future extensions. Drivers and applications
+	must set this to 0.
+    * - __u32
+      - ``request_fd``
+      - The file descriptor of the request to queue the buffer to. If the flag
+        ``V4L2_BUF_FLAG_REQUEST_FD`` is set, then the buffer will be
+	queued to this request. If the flag is not set, then this field will
+	be ignored.
+
+	The ``V4L2_BUF_FLAG_REQUEST_FD`` flag and this field are only used by
+	:ref:`ioctl VIDIOC_QBUF <VIDIOC_QBUF>` and ignored by other ioctls that
+	take a :c:type:`v4l2_buffer` as argument.
+
+	Applications should not set ``V4L2_BUF_FLAG_REQUEST_FD`` for any ioctls
+	other than :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`.
+
+	If the device does not support requests, then ``EBADR`` will be returned.
+	If requests are supported but an invalid request file descriptor is
+	given, then ``EINVAL`` will be returned.
+
+
+.. c:type:: v4l2_plane
+
+struct v4l2_plane
+=================
+
+.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}|
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``bytesused``
+      - The number of bytes occupied by data in the plane (its payload).
+	Drivers must set this field when ``type`` refers to a capture
+	stream, applications when it refers to an output stream. If the
+	application sets this to 0 for an output stream, then
+	``bytesused`` will be set to the size of the plane (see the
+	``length`` field of this struct) by the driver.
+
+	.. note::
+
+	   Note that the actual image data starts at ``data_offset``
+	   which may not be 0.
+    * - __u32
+      - ``length``
+      - Size in bytes of the plane (not its payload). This is set by the
+	driver based on the calls to
+	:ref:`VIDIOC_REQBUFS` and/or
+	:ref:`VIDIOC_CREATE_BUFS`.
+    * - union {
+      - ``m``
+    * - __u32
+      - ``mem_offset``
+      - When the memory type in the containing struct
+	:c:type:`v4l2_buffer` is ``V4L2_MEMORY_MMAP``, this
+	is the value that should be passed to :c:func:`mmap()`,
+	similar to the ``offset`` field in struct
+	:c:type:`v4l2_buffer`.
+    * - unsigned long
+      - ``userptr``
+      - When the memory type in the containing struct
+	:c:type:`v4l2_buffer` is ``V4L2_MEMORY_USERPTR``,
+	this is a userspace pointer to the memory allocated for this plane
+	by an application.
+    * - int
+      - ``fd``
+      - When the memory type in the containing struct
+	:c:type:`v4l2_buffer` is ``V4L2_MEMORY_DMABUF``,
+	this is a file descriptor associated with a DMABUF buffer, similar
+	to the ``fd`` field in struct :c:type:`v4l2_buffer`.
+    * - }
+      -
+    * - __u32
+      - ``data_offset``
+      - Offset in bytes to video data in the plane. Drivers must set this
+	field when ``type`` refers to a capture stream, applications when
+	it refers to an output stream.
+
+	.. note::
+
+	   That data_offset is included  in ``bytesused``. So the
+	   size of the image in the plane is ``bytesused``-``data_offset``
+	   at offset ``data_offset`` from the start of the plane.
+    * - __u32
+      - ``reserved[11]``
+      - Reserved for future use. Should be zeroed by drivers and
+	applications.
+
+
+.. c:type:: v4l2_buf_type
+
+enum v4l2_buf_type
+==================
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{7.8cm}|p{0.6cm}|p{9.1cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       4 1 9
+
+    * - ``V4L2_BUF_TYPE_VIDEO_CAPTURE``
+      - 1
+      - Buffer of a single-planar video capture stream, see
+	:ref:`capture`.
+    * - ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``
+      - 9
+      - Buffer of a multi-planar video capture stream, see
+	:ref:`capture`.
+    * - ``V4L2_BUF_TYPE_VIDEO_OUTPUT``
+      - 2
+      - Buffer of a single-planar video output stream, see
+	:ref:`output`.
+    * - ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``
+      - 10
+      - Buffer of a multi-planar video output stream, see :ref:`output`.
+    * - ``V4L2_BUF_TYPE_VIDEO_OVERLAY``
+      - 3
+      - Buffer for video overlay, see :ref:`overlay`.
+    * - ``V4L2_BUF_TYPE_VBI_CAPTURE``
+      - 4
+      - Buffer of a raw VBI capture stream, see :ref:`raw-vbi`.
+    * - ``V4L2_BUF_TYPE_VBI_OUTPUT``
+      - 5
+      - Buffer of a raw VBI output stream, see :ref:`raw-vbi`.
+    * - ``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE``
+      - 6
+      - Buffer of a sliced VBI capture stream, see :ref:`sliced`.
+    * - ``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT``
+      - 7
+      - Buffer of a sliced VBI output stream, see :ref:`sliced`.
+    * - ``V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY``
+      - 8
+      - Buffer for video output overlay (OSD), see :ref:`osd`.
+    * - ``V4L2_BUF_TYPE_SDR_CAPTURE``
+      - 11
+      - Buffer for Software Defined Radio (SDR) capture stream, see
+	:ref:`sdr`.
+    * - ``V4L2_BUF_TYPE_SDR_OUTPUT``
+      - 12
+      - Buffer for Software Defined Radio (SDR) output stream, see
+	:ref:`sdr`.
+    * - ``V4L2_BUF_TYPE_META_CAPTURE``
+      - 13
+      - Buffer for metadata capture, see :ref:`metadata`.
+    * - ``V4L2_BUF_TYPE_META_OUTPUT``
+      - 14
+      - Buffer for metadata output, see :ref:`metadata`.
+
+
+.. _buffer-flags:
+
+Buffer Flags
+============
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{7.0cm}|p{2.1cm}|p{8.4cm}|
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`V4L2-BUF-FLAG-MAPPED`:
+
+      - ``V4L2_BUF_FLAG_MAPPED``
+      - 0x00000001
+      - The buffer resides in device memory and has been mapped into the
+	application's address space, see :ref:`mmap` for details.
+	Drivers set or clear this flag when the
+	:ref:`VIDIOC_QUERYBUF`,
+	:ref:`VIDIOC_QBUF` or
+	:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl is called. Set by the
+	driver.
+    * .. _`V4L2-BUF-FLAG-QUEUED`:
+
+      - ``V4L2_BUF_FLAG_QUEUED``
+      - 0x00000002
+      - Internally drivers maintain two buffer queues, an incoming and
+	outgoing queue. When this flag is set, the buffer is currently on
+	the incoming queue. It automatically moves to the outgoing queue
+	after the buffer has been filled (capture devices) or displayed
+	(output devices). Drivers set or clear this flag when the
+	``VIDIOC_QUERYBUF`` ioctl is called. After (successful) calling
+	the ``VIDIOC_QBUF``\ ioctl it is always set and after
+	``VIDIOC_DQBUF`` always cleared.
+    * .. _`V4L2-BUF-FLAG-DONE`:
+
+      - ``V4L2_BUF_FLAG_DONE``
+      - 0x00000004
+      - When this flag is set, the buffer is currently on the outgoing
+	queue, ready to be dequeued from the driver. Drivers set or clear
+	this flag when the ``VIDIOC_QUERYBUF`` ioctl is called. After
+	calling the ``VIDIOC_QBUF`` or ``VIDIOC_DQBUF`` it is always
+	cleared. Of course a buffer cannot be on both queues at the same
+	time, the ``V4L2_BUF_FLAG_QUEUED`` and ``V4L2_BUF_FLAG_DONE`` flag
+	are mutually exclusive. They can be both cleared however, then the
+	buffer is in "dequeued" state, in the application domain so to
+	say.
+    * .. _`V4L2-BUF-FLAG-ERROR`:
+
+      - ``V4L2_BUF_FLAG_ERROR``
+      - 0x00000040
+      - When this flag is set, the buffer has been dequeued successfully,
+	although the data might have been corrupted. This is recoverable,
+	streaming may continue as normal and the buffer may be reused
+	normally. Drivers set this flag when the ``VIDIOC_DQBUF`` ioctl is
+	called.
+    * .. _`V4L2-BUF-FLAG-IN-REQUEST`:
+
+      - ``V4L2_BUF_FLAG_IN_REQUEST``
+      - 0x00000080
+      - This buffer is part of a request that hasn't been queued yet.
+    * .. _`V4L2-BUF-FLAG-KEYFRAME`:
+
+      - ``V4L2_BUF_FLAG_KEYFRAME``
+      - 0x00000008
+      - Drivers set or clear this flag when calling the ``VIDIOC_DQBUF``
+	ioctl. It may be set by video capture devices when the buffer
+	contains a compressed image which is a key frame (or field), i. e.
+	can be decompressed on its own. Also known as an I-frame.
+	Applications can set this bit when ``type`` refers to an output
+	stream.
+    * .. _`V4L2-BUF-FLAG-PFRAME`:
+
+      - ``V4L2_BUF_FLAG_PFRAME``
+      - 0x00000010
+      - Similar to ``V4L2_BUF_FLAG_KEYFRAME`` this flags predicted frames
+	or fields which contain only differences to a previous key frame.
+	Applications can set this bit when ``type`` refers to an output
+	stream.
+    * .. _`V4L2-BUF-FLAG-BFRAME`:
+
+      - ``V4L2_BUF_FLAG_BFRAME``
+      - 0x00000020
+      - Similar to ``V4L2_BUF_FLAG_KEYFRAME`` this flags a bi-directional
+	predicted frame or field which contains only the differences
+	between the current frame and both the preceding and following key
+	frames to specify its content. Applications can set this bit when
+	``type`` refers to an output stream.
+    * .. _`V4L2-BUF-FLAG-TIMECODE`:
+
+      - ``V4L2_BUF_FLAG_TIMECODE``
+      - 0x00000100
+      - The ``timecode`` field is valid. Drivers set or clear this flag
+	when the ``VIDIOC_DQBUF`` ioctl is called. Applications can set
+	this bit and the corresponding ``timecode`` structure when
+	``type`` refers to an output stream.
+    * .. _`V4L2-BUF-FLAG-PREPARED`:
+
+      - ``V4L2_BUF_FLAG_PREPARED``
+      - 0x00000400
+      - The buffer has been prepared for I/O and can be queued by the
+	application. Drivers set or clear this flag when the
+	:ref:`VIDIOC_QUERYBUF`,
+	:ref:`VIDIOC_PREPARE_BUF <VIDIOC_QBUF>`,
+	:ref:`VIDIOC_QBUF` or
+	:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl is called.
+    * .. _`V4L2-BUF-FLAG-NO-CACHE-INVALIDATE`:
+
+      - ``V4L2_BUF_FLAG_NO_CACHE_INVALIDATE``
+      - 0x00000800
+      - Caches do not have to be invalidated for this buffer. Typically
+	applications shall use this flag if the data captured in the
+	buffer is not going to be touched by the CPU, instead the buffer
+	will, probably, be passed on to a DMA-capable hardware unit for
+	further processing or output. This flag is ignored unless the
+	queue is used for :ref:`memory mapping <mmap>` streaming I/O and
+	reports :ref:`V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS
+	<V4L2-BUF-CAP-SUPPORTS-MMAP-CACHE-HINTS>` capability.
+    * .. _`V4L2-BUF-FLAG-NO-CACHE-CLEAN`:
+
+      - ``V4L2_BUF_FLAG_NO_CACHE_CLEAN``
+      - 0x00001000
+      - Caches do not have to be cleaned for this buffer. Typically
+	applications shall use this flag for output buffers if the data in
+	this buffer has not been created by the CPU but by some
+	DMA-capable unit, in which case caches have not been used. This flag
+	is ignored unless the queue is used for :ref:`memory mapping <mmap>`
+	streaming I/O and reports :ref:`V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS
+	<V4L2-BUF-CAP-SUPPORTS-MMAP-CACHE-HINTS>` capability.
+    * .. _`V4L2-BUF-FLAG-M2M-HOLD-CAPTURE-BUF`:
+
+      - ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF``
+      - 0x00000200
+      - Only valid if ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` is
+	set. It is typically used with stateless decoders where multiple
+	output buffers each decode to a slice of the decoded frame.
+	Applications can set this flag when queueing the output buffer
+	to prevent the driver from dequeueing the capture buffer after
+	the output buffer has been decoded (i.e. the capture buffer is
+	'held'). If the timestamp of this output buffer differs from that
+	of the previous output buffer, then that indicates the start of a
+	new frame and the previously held capture buffer is dequeued.
+    * .. _`V4L2-BUF-FLAG-LAST`:
+
+      - ``V4L2_BUF_FLAG_LAST``
+      - 0x00100000
+      - Last buffer produced by the hardware. mem2mem codec drivers set
+	this flag on the capture queue for the last buffer when the
+	:ref:`VIDIOC_QUERYBUF` or
+	:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl is called. Due to
+	hardware limitations, the last buffer may be empty. In this case
+	the driver will set the ``bytesused`` field to 0, regardless of
+	the format. Any Any subsequent call to the
+	:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl will not block anymore,
+	but return an ``EPIPE`` error code.
+    * .. _`V4L2-BUF-FLAG-REQUEST-FD`:
+
+      - ``V4L2_BUF_FLAG_REQUEST_FD``
+      - 0x00800000
+      - The ``request_fd`` field contains a valid file descriptor.
+    * .. _`V4L2-BUF-FLAG-TIMESTAMP-MASK`:
+
+      - ``V4L2_BUF_FLAG_TIMESTAMP_MASK``
+      - 0x0000e000
+      - Mask for timestamp types below. To test the timestamp type, mask
+	out bits not belonging to timestamp type by performing a logical
+	and operation with buffer flags and timestamp mask.
+    * .. _`V4L2-BUF-FLAG-TIMESTAMP-UNKNOWN`:
+
+      - ``V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN``
+      - 0x00000000
+      - Unknown timestamp type. This type is used by drivers before Linux
+	3.9 and may be either monotonic (see below) or realtime (wall
+	clock). Monotonic clock has been favoured in embedded systems
+	whereas most of the drivers use the realtime clock. Either kinds
+	of timestamps are available in user space via
+	:c:func:`clock_gettime` using clock IDs ``CLOCK_MONOTONIC``
+	and ``CLOCK_REALTIME``, respectively.
+    * .. _`V4L2-BUF-FLAG-TIMESTAMP-MONOTONIC`:
+
+      - ``V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC``
+      - 0x00002000
+      - The buffer timestamp has been taken from the ``CLOCK_MONOTONIC``
+	clock. To access the same clock outside V4L2, use
+	:c:func:`clock_gettime`.
+    * .. _`V4L2-BUF-FLAG-TIMESTAMP-COPY`:
+
+      - ``V4L2_BUF_FLAG_TIMESTAMP_COPY``
+      - 0x00004000
+      - The CAPTURE buffer timestamp has been taken from the corresponding
+	OUTPUT buffer. This flag applies only to mem2mem devices.
+    * .. _`V4L2-BUF-FLAG-TSTAMP-SRC-MASK`:
+
+      - ``V4L2_BUF_FLAG_TSTAMP_SRC_MASK``
+      - 0x00070000
+      - Mask for timestamp sources below. The timestamp source defines the
+	point of time the timestamp is taken in relation to the frame.
+	Logical 'and' operation between the ``flags`` field and
+	``V4L2_BUF_FLAG_TSTAMP_SRC_MASK`` produces the value of the
+	timestamp source. Applications must set the timestamp source when
+	``type`` refers to an output stream and
+	``V4L2_BUF_FLAG_TIMESTAMP_COPY`` is set.
+    * .. _`V4L2-BUF-FLAG-TSTAMP-SRC-EOF`:
+
+      - ``V4L2_BUF_FLAG_TSTAMP_SRC_EOF``
+      - 0x00000000
+      - End Of Frame. The buffer timestamp has been taken when the last
+	pixel of the frame has been received or the last pixel of the
+	frame has been transmitted. In practice, software generated
+	timestamps will typically be read from the clock a small amount of
+	time after the last pixel has been received or transmitten,
+	depending on the system and other activity in it.
+    * .. _`V4L2-BUF-FLAG-TSTAMP-SRC-SOE`:
+
+      - ``V4L2_BUF_FLAG_TSTAMP_SRC_SOE``
+      - 0x00010000
+      - Start Of Exposure. The buffer timestamp has been taken when the
+	exposure of the frame has begun. This is only valid for the
+	``V4L2_BUF_TYPE_VIDEO_CAPTURE`` buffer type.
+
+.. raw:: latex
+
+    \normalsize
+
+.. _memory-flags:
+
+enum v4l2_memory
+================
+
+.. tabularcolumns:: |p{5.0cm}|p{0.8cm}|p{11.7cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_MEMORY_MMAP``
+      - 1
+      - The buffer is used for :ref:`memory mapping <mmap>` I/O.
+    * - ``V4L2_MEMORY_USERPTR``
+      - 2
+      - The buffer is used for :ref:`user pointer <userp>` I/O.
+    * - ``V4L2_MEMORY_OVERLAY``
+      - 3
+      - [to do]
+    * - ``V4L2_MEMORY_DMABUF``
+      - 4
+      - The buffer is used for :ref:`DMA shared buffer <dmabuf>` I/O.
+
+
+Timecodes
+=========
+
+The :c:type:`v4l2_buffer_timecode` structure is designed to hold a
+:ref:`smpte12m` or similar timecode.
+(struct :c:type:`timeval` timestamps are stored in the struct
+:c:type:`v4l2_buffer` ``timestamp`` field.)
+
+.. c:type:: v4l2_timecode
+
+struct v4l2_timecode
+--------------------
+
+.. tabularcolumns:: |p{1.4cm}|p{2.8cm}|p{12.3cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Frame rate the timecodes are based on, see :ref:`timecode-type`.
+    * - __u32
+      - ``flags``
+      - Timecode flags, see :ref:`timecode-flags`.
+    * - __u8
+      - ``frames``
+      - Frame count, 0 ... 23/24/29/49/59, depending on the type of
+	timecode.
+    * - __u8
+      - ``seconds``
+      - Seconds count, 0 ... 59. This is a binary, not BCD number.
+    * - __u8
+      - ``minutes``
+      - Minutes count, 0 ... 59. This is a binary, not BCD number.
+    * - __u8
+      - ``hours``
+      - Hours count, 0 ... 29. This is a binary, not BCD number.
+    * - __u8
+      - ``userbits``\ [4]
+      - The "user group" bits from the timecode.
+
+
+.. _timecode-type:
+
+Timecode Types
+--------------
+
+.. tabularcolumns:: |p{5.6cm}|p{0.8cm}|p{11.1cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_TC_TYPE_24FPS``
+      - 1
+      - 24 frames per second, i. e. film.
+    * - ``V4L2_TC_TYPE_25FPS``
+      - 2
+      - 25 frames per second, i. e. PAL or SECAM video.
+    * - ``V4L2_TC_TYPE_30FPS``
+      - 3
+      - 30 frames per second, i. e. NTSC video.
+    * - ``V4L2_TC_TYPE_50FPS``
+      - 4
+      -
+    * - ``V4L2_TC_TYPE_60FPS``
+      - 5
+      -
+
+
+.. _timecode-flags:
+
+Timecode Flags
+--------------
+
+.. tabularcolumns:: |p{6.6cm}|p{1.4cm}|p{9.5cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_TC_FLAG_DROPFRAME``
+      - 0x0001
+      - Indicates "drop frame" semantics for counting frames in 29.97 fps
+	material. When set, frame numbers 0 and 1 at the start of each
+	minute, except minutes 0, 10, 20, 30, 40, 50 are omitted from the
+	count.
+    * - ``V4L2_TC_FLAG_COLORFRAME``
+      - 0x0002
+      - The "color frame" flag.
+    * - ``V4L2_TC_USERBITS_field``
+      - 0x000C
+      - Field mask for the "binary group flags".
+    * - ``V4L2_TC_USERBITS_USERDEFINED``
+      - 0x0000
+      - Unspecified format.
+    * - ``V4L2_TC_USERBITS_8BITCHARS``
+      - 0x0008
+      - 8-bit ISO characters.
diff --git a/Documentation/userspace-api/media/v4l/capture-example.rst b/Documentation/userspace-api/media/v4l/capture-example.rst
new file mode 100644
index 000000000..25891320b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/capture-example.rst
@@ -0,0 +1,13 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _capture-example:
+
+*********************
+Video Capture Example
+*********************
+
+
+.. toctree::
+    :maxdepth: 1
+
+    capture.c
diff --git a/Documentation/userspace-api/media/v4l/capture.c.rst b/Documentation/userspace-api/media/v4l/capture.c.rst
new file mode 100644
index 000000000..ccbd52c38
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/capture.c.rst
@@ -0,0 +1,664 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+file: media/v4l/capture.c
+=========================
+
+.. code-block:: c
+
+    /*
+     *  V4L2 video capture example
+     *
+     *  This program can be used and distributed without restrictions.
+     *
+     *      This program is provided with the V4L2 API
+     * see https://linuxtv.org/docs.php for more information
+     */
+
+    #include <stdio.h>
+    #include <stdlib.h>
+    #include <string.h>
+    #include <assert.h>
+
+    #include <getopt.h>             /* getopt_long() */
+
+    #include <fcntl.h>              /* low-level i/o */
+    #include <unistd.h>
+    #include <errno.h>
+    #include <sys/stat.h>
+    #include <sys/types.h>
+    #include <sys/time.h>
+    #include <sys/mman.h>
+    #include <sys/ioctl.h>
+
+    #include <linux/videodev2.h>
+
+    #define CLEAR(x) memset(&(x), 0, sizeof(x))
+
+    enum io_method {
+	    IO_METHOD_READ,
+	    IO_METHOD_MMAP,
+	    IO_METHOD_USERPTR,
+    };
+
+    struct buffer {
+	    void   *start;
+	    size_t  length;
+    };
+
+    static char            *dev_name;
+    static enum io_method   io = IO_METHOD_MMAP;
+    static int              fd = -1;
+    struct buffer          *buffers;
+    static unsigned int     n_buffers;
+    static int              out_buf;
+    static int              force_format;
+    static int              frame_count = 70;
+
+    static void errno_exit(const char *s)
+    {
+	    fprintf(stderr, "%s error %d, %s\\n", s, errno, strerror(errno));
+	    exit(EXIT_FAILURE);
+    }
+
+    static int xioctl(int fh, int request, void *arg)
+    {
+	    int r;
+
+	    do {
+		    r = ioctl(fh, request, arg);
+	    } while (-1 == r && EINTR == errno);
+
+	    return r;
+    }
+
+    static void process_image(const void *p, int size)
+    {
+	    if (out_buf)
+		    fwrite(p, size, 1, stdout);
+
+	    fflush(stderr);
+	    fprintf(stderr, ".");
+	    fflush(stdout);
+    }
+
+    static int read_frame(void)
+    {
+	    struct v4l2_buffer buf;
+	    unsigned int i;
+
+	    switch (io) {
+	    case IO_METHOD_READ:
+		    if (-1 == read(fd, buffers[0].start, buffers[0].length)) {
+			    switch (errno) {
+			    case EAGAIN:
+				    return 0;
+
+			    case EIO:
+				    /* Could ignore EIO, see spec. */
+
+				    /* fall through */
+
+			    default:
+				    errno_exit("read");
+			    }
+		    }
+
+		    process_image(buffers[0].start, buffers[0].length);
+		    break;
+
+	    case IO_METHOD_MMAP:
+		    CLEAR(buf);
+
+		    buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    buf.memory = V4L2_MEMORY_MMAP;
+
+		    if (-1 == xioctl(fd, VIDIOC_DQBUF, &buf)) {
+			    switch (errno) {
+			    case EAGAIN:
+				    return 0;
+
+			    case EIO:
+				    /* Could ignore EIO, see spec. */
+
+				    /* fall through */
+
+			    default:
+				    errno_exit("VIDIOC_DQBUF");
+			    }
+		    }
+
+		    assert(buf.index < n_buffers);
+
+		    process_image(buffers[buf.index].start, buf.bytesused);
+
+		    if (-1 == xioctl(fd, VIDIOC_QBUF, &buf))
+			    errno_exit("VIDIOC_QBUF");
+		    break;
+
+	    case IO_METHOD_USERPTR:
+		    CLEAR(buf);
+
+		    buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    buf.memory = V4L2_MEMORY_USERPTR;
+
+		    if (-1 == xioctl(fd, VIDIOC_DQBUF, &buf)) {
+			    switch (errno) {
+			    case EAGAIN:
+				    return 0;
+
+			    case EIO:
+				    /* Could ignore EIO, see spec. */
+
+				    /* fall through */
+
+			    default:
+				    errno_exit("VIDIOC_DQBUF");
+			    }
+		    }
+
+		    for (i = 0; i < n_buffers; ++i)
+			    if (buf.m.userptr == (unsigned long)buffers[i].start
+				&& buf.length == buffers[i].length)
+				    break;
+
+		    assert(i < n_buffers);
+
+		    process_image((void *)buf.m.userptr, buf.bytesused);
+
+		    if (-1 == xioctl(fd, VIDIOC_QBUF, &buf))
+			    errno_exit("VIDIOC_QBUF");
+		    break;
+	    }
+
+	    return 1;
+    }
+
+    static void mainloop(void)
+    {
+	    unsigned int count;
+
+	    count = frame_count;
+
+	    while (count-- > 0) {
+		    for (;;) {
+			    fd_set fds;
+			    struct timeval tv;
+			    int r;
+
+			    FD_ZERO(&fds);
+			    FD_SET(fd, &fds);
+
+			    /* Timeout. */
+			    tv.tv_sec = 2;
+			    tv.tv_usec = 0;
+
+			    r = select(fd + 1, &fds, NULL, NULL, &tv);
+
+			    if (-1 == r) {
+				    if (EINTR == errno)
+					    continue;
+				    errno_exit("select");
+			    }
+
+			    if (0 == r) {
+				    fprintf(stderr, "select timeout\\n");
+				    exit(EXIT_FAILURE);
+			    }
+
+			    if (read_frame())
+				    break;
+			    /* EAGAIN - continue select loop. */
+		    }
+	    }
+    }
+
+    static void stop_capturing(void)
+    {
+	    enum v4l2_buf_type type;
+
+	    switch (io) {
+	    case IO_METHOD_READ:
+		    /* Nothing to do. */
+		    break;
+
+	    case IO_METHOD_MMAP:
+	    case IO_METHOD_USERPTR:
+		    type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    if (-1 == xioctl(fd, VIDIOC_STREAMOFF, &type))
+			    errno_exit("VIDIOC_STREAMOFF");
+		    break;
+	    }
+    }
+
+    static void start_capturing(void)
+    {
+	    unsigned int i;
+	    enum v4l2_buf_type type;
+
+	    switch (io) {
+	    case IO_METHOD_READ:
+		    /* Nothing to do. */
+		    break;
+
+	    case IO_METHOD_MMAP:
+		    for (i = 0; i < n_buffers; ++i) {
+			    struct v4l2_buffer buf;
+
+			    CLEAR(buf);
+			    buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+			    buf.memory = V4L2_MEMORY_MMAP;
+			    buf.index = i;
+
+			    if (-1 == xioctl(fd, VIDIOC_QBUF, &buf))
+				    errno_exit("VIDIOC_QBUF");
+		    }
+		    type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    if (-1 == xioctl(fd, VIDIOC_STREAMON, &type))
+			    errno_exit("VIDIOC_STREAMON");
+		    break;
+
+	    case IO_METHOD_USERPTR:
+		    for (i = 0; i < n_buffers; ++i) {
+			    struct v4l2_buffer buf;
+
+			    CLEAR(buf);
+			    buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+			    buf.memory = V4L2_MEMORY_USERPTR;
+			    buf.index = i;
+			    buf.m.userptr = (unsigned long)buffers[i].start;
+			    buf.length = buffers[i].length;
+
+			    if (-1 == xioctl(fd, VIDIOC_QBUF, &buf))
+				    errno_exit("VIDIOC_QBUF");
+		    }
+		    type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    if (-1 == xioctl(fd, VIDIOC_STREAMON, &type))
+			    errno_exit("VIDIOC_STREAMON");
+		    break;
+	    }
+    }
+
+    static void uninit_device(void)
+    {
+	    unsigned int i;
+
+	    switch (io) {
+	    case IO_METHOD_READ:
+		    free(buffers[0].start);
+		    break;
+
+	    case IO_METHOD_MMAP:
+		    for (i = 0; i < n_buffers; ++i)
+			    if (-1 == munmap(buffers[i].start, buffers[i].length))
+				    errno_exit("munmap");
+		    break;
+
+	    case IO_METHOD_USERPTR:
+		    for (i = 0; i < n_buffers; ++i)
+			    free(buffers[i].start);
+		    break;
+	    }
+
+	    free(buffers);
+    }
+
+    static void init_read(unsigned int buffer_size)
+    {
+	    buffers = calloc(1, sizeof(*buffers));
+
+	    if (!buffers) {
+		    fprintf(stderr, "Out of memory\\n");
+		    exit(EXIT_FAILURE);
+	    }
+
+	    buffers[0].length = buffer_size;
+	    buffers[0].start = malloc(buffer_size);
+
+	    if (!buffers[0].start) {
+		    fprintf(stderr, "Out of memory\\n");
+		    exit(EXIT_FAILURE);
+	    }
+    }
+
+    static void init_mmap(void)
+    {
+	    struct v4l2_requestbuffers req;
+
+	    CLEAR(req);
+
+	    req.count = 4;
+	    req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	    req.memory = V4L2_MEMORY_MMAP;
+
+	    if (-1 == xioctl(fd, VIDIOC_REQBUFS, &req)) {
+		    if (EINVAL == errno) {
+			    fprintf(stderr, "%s does not support "
+				     "memory mappingn", dev_name);
+			    exit(EXIT_FAILURE);
+		    } else {
+			    errno_exit("VIDIOC_REQBUFS");
+		    }
+	    }
+
+	    if (req.count < 2) {
+		    fprintf(stderr, "Insufficient buffer memory on %s\\n",
+			     dev_name);
+		    exit(EXIT_FAILURE);
+	    }
+
+	    buffers = calloc(req.count, sizeof(*buffers));
+
+	    if (!buffers) {
+		    fprintf(stderr, "Out of memory\\n");
+		    exit(EXIT_FAILURE);
+	    }
+
+	    for (n_buffers = 0; n_buffers < req.count; ++n_buffers) {
+		    struct v4l2_buffer buf;
+
+		    CLEAR(buf);
+
+		    buf.type        = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    buf.memory      = V4L2_MEMORY_MMAP;
+		    buf.index       = n_buffers;
+
+		    if (-1 == xioctl(fd, VIDIOC_QUERYBUF, &buf))
+			    errno_exit("VIDIOC_QUERYBUF");
+
+		    buffers[n_buffers].length = buf.length;
+		    buffers[n_buffers].start =
+			    mmap(NULL /* start anywhere */,
+				  buf.length,
+				  PROT_READ | PROT_WRITE /* required */,
+				  MAP_SHARED /* recommended */,
+				  fd, buf.m.offset);
+
+		    if (MAP_FAILED == buffers[n_buffers].start)
+			    errno_exit("mmap");
+	    }
+    }
+
+    static void init_userp(unsigned int buffer_size)
+    {
+	    struct v4l2_requestbuffers req;
+
+	    CLEAR(req);
+
+	    req.count  = 4;
+	    req.type   = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	    req.memory = V4L2_MEMORY_USERPTR;
+
+	    if (-1 == xioctl(fd, VIDIOC_REQBUFS, &req)) {
+		    if (EINVAL == errno) {
+			    fprintf(stderr, "%s does not support "
+				     "user pointer i/on", dev_name);
+			    exit(EXIT_FAILURE);
+		    } else {
+			    errno_exit("VIDIOC_REQBUFS");
+		    }
+	    }
+
+	    buffers = calloc(4, sizeof(*buffers));
+
+	    if (!buffers) {
+		    fprintf(stderr, "Out of memory\\n");
+		    exit(EXIT_FAILURE);
+	    }
+
+	    for (n_buffers = 0; n_buffers < 4; ++n_buffers) {
+		    buffers[n_buffers].length = buffer_size;
+		    buffers[n_buffers].start = malloc(buffer_size);
+
+		    if (!buffers[n_buffers].start) {
+			    fprintf(stderr, "Out of memory\\n");
+			    exit(EXIT_FAILURE);
+		    }
+	    }
+    }
+
+    static void init_device(void)
+    {
+	    struct v4l2_capability cap;
+	    struct v4l2_cropcap cropcap;
+	    struct v4l2_crop crop;
+	    struct v4l2_format fmt;
+	    unsigned int min;
+
+	    if (-1 == xioctl(fd, VIDIOC_QUERYCAP, &cap)) {
+		    if (EINVAL == errno) {
+			    fprintf(stderr, "%s is no V4L2 device\\n",
+				     dev_name);
+			    exit(EXIT_FAILURE);
+		    } else {
+			    errno_exit("VIDIOC_QUERYCAP");
+		    }
+	    }
+
+	    if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
+		    fprintf(stderr, "%s is no video capture device\\n",
+			     dev_name);
+		    exit(EXIT_FAILURE);
+	    }
+
+	    switch (io) {
+	    case IO_METHOD_READ:
+		    if (!(cap.capabilities & V4L2_CAP_READWRITE)) {
+			    fprintf(stderr, "%s does not support read i/o\\n",
+				     dev_name);
+			    exit(EXIT_FAILURE);
+		    }
+		    break;
+
+	    case IO_METHOD_MMAP:
+	    case IO_METHOD_USERPTR:
+		    if (!(cap.capabilities & V4L2_CAP_STREAMING)) {
+			    fprintf(stderr, "%s does not support streaming i/o\\n",
+				     dev_name);
+			    exit(EXIT_FAILURE);
+		    }
+		    break;
+	    }
+
+
+	    /* Select video input, video standard and tune here. */
+
+
+	    CLEAR(cropcap);
+
+	    cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+	    if (0 == xioctl(fd, VIDIOC_CROPCAP, &cropcap)) {
+		    crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    crop.c = cropcap.defrect; /* reset to default */
+
+		    if (-1 == xioctl(fd, VIDIOC_S_CROP, &crop)) {
+			    switch (errno) {
+			    case EINVAL:
+				    /* Cropping not supported. */
+				    break;
+			    default:
+				    /* Errors ignored. */
+				    break;
+			    }
+		    }
+	    } else {
+		    /* Errors ignored. */
+	    }
+
+
+	    CLEAR(fmt);
+
+	    fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	    if (force_format) {
+		    fmt.fmt.pix.width       = 640;
+		    fmt.fmt.pix.height      = 480;
+		    fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+		    fmt.fmt.pix.field       = V4L2_FIELD_INTERLACED;
+
+		    if (-1 == xioctl(fd, VIDIOC_S_FMT, &fmt))
+			    errno_exit("VIDIOC_S_FMT");
+
+		    /* Note VIDIOC_S_FMT may change width and height. */
+	    } else {
+		    /* Preserve original settings as set by v4l2-ctl for example */
+		    if (-1 == xioctl(fd, VIDIOC_G_FMT, &fmt))
+			    errno_exit("VIDIOC_G_FMT");
+	    }
+
+	    /* Buggy driver paranoia. */
+	    min = fmt.fmt.pix.width * 2;
+	    if (fmt.fmt.pix.bytesperline < min)
+		    fmt.fmt.pix.bytesperline = min;
+	    min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
+	    if (fmt.fmt.pix.sizeimage < min)
+		    fmt.fmt.pix.sizeimage = min;
+
+	    switch (io) {
+	    case IO_METHOD_READ:
+		    init_read(fmt.fmt.pix.sizeimage);
+		    break;
+
+	    case IO_METHOD_MMAP:
+		    init_mmap();
+		    break;
+
+	    case IO_METHOD_USERPTR:
+		    init_userp(fmt.fmt.pix.sizeimage);
+		    break;
+	    }
+    }
+
+    static void close_device(void)
+    {
+	    if (-1 == close(fd))
+		    errno_exit("close");
+
+	    fd = -1;
+    }
+
+    static void open_device(void)
+    {
+	    struct stat st;
+
+	    if (-1 == stat(dev_name, &st)) {
+		    fprintf(stderr, "Cannot identify '%s': %d, %s\\n",
+			     dev_name, errno, strerror(errno));
+		    exit(EXIT_FAILURE);
+	    }
+
+	    if (!S_ISCHR(st.st_mode)) {
+		    fprintf(stderr, "%s is no devicen", dev_name);
+		    exit(EXIT_FAILURE);
+	    }
+
+	    fd = open(dev_name, O_RDWR /* required */ | O_NONBLOCK, 0);
+
+	    if (-1 == fd) {
+		    fprintf(stderr, "Cannot open '%s': %d, %s\\n",
+			     dev_name, errno, strerror(errno));
+		    exit(EXIT_FAILURE);
+	    }
+    }
+
+    static void usage(FILE *fp, int argc, char **argv)
+    {
+	    fprintf(fp,
+		     "Usage: %s [options]\\n\\n"
+		     "Version 1.3\\n"
+		     "Options:\\n"
+		     "-d | --device name   Video device name [%s]n"
+		     "-h | --help          Print this messagen"
+		     "-m | --mmap          Use memory mapped buffers [default]n"
+		     "-r | --read          Use read() callsn"
+		     "-u | --userp         Use application allocated buffersn"
+		     "-o | --output        Outputs stream to stdoutn"
+		     "-f | --format        Force format to 640x480 YUYVn"
+		     "-c | --count         Number of frames to grab [%i]n"
+		     "",
+		     argv[0], dev_name, frame_count);
+    }
+
+    static const char short_options[] = "d:hmruofc:";
+
+    static const struct option
+    long_options[] = {
+	    { "device", required_argument, NULL, 'd' },
+	    { "help",   no_argument,       NULL, 'h' },
+	    { "mmap",   no_argument,       NULL, 'm' },
+	    { "read",   no_argument,       NULL, 'r' },
+	    { "userp",  no_argument,       NULL, 'u' },
+	    { "output", no_argument,       NULL, 'o' },
+	    { "format", no_argument,       NULL, 'f' },
+	    { "count",  required_argument, NULL, 'c' },
+	    { 0, 0, 0, 0 }
+    };
+
+    int main(int argc, char **argv)
+    {
+	    dev_name = "/dev/video0";
+
+	    for (;;) {
+		    int idx;
+		    int c;
+
+		    c = getopt_long(argc, argv,
+				    short_options, long_options, &idx);
+
+		    if (-1 == c)
+			    break;
+
+		    switch (c) {
+		    case 0: /* getopt_long() flag */
+			    break;
+
+		    case 'd':
+			    dev_name = optarg;
+			    break;
+
+		    case 'h':
+			    usage(stdout, argc, argv);
+			    exit(EXIT_SUCCESS);
+
+		    case 'm':
+			    io = IO_METHOD_MMAP;
+			    break;
+
+		    case 'r':
+			    io = IO_METHOD_READ;
+			    break;
+
+		    case 'u':
+			    io = IO_METHOD_USERPTR;
+			    break;
+
+		    case 'o':
+			    out_buf++;
+			    break;
+
+		    case 'f':
+			    force_format++;
+			    break;
+
+		    case 'c':
+			    errno = 0;
+			    frame_count = strtol(optarg, NULL, 0);
+			    if (errno)
+				    errno_exit(optarg);
+			    break;
+
+		    default:
+			    usage(stderr, argc, argv);
+			    exit(EXIT_FAILURE);
+		    }
+	    }
+
+	    open_device();
+	    init_device();
+	    start_capturing();
+	    mainloop();
+	    stop_capturing();
+	    uninit_device();
+	    close_device();
+	    fprintf(stderr, "\\n");
+	    return 0;
+    }
diff --git a/Documentation/userspace-api/media/v4l/colorspaces-defs.rst b/Documentation/userspace-api/media/v4l/colorspaces-defs.rst
new file mode 100644
index 000000000..fe9f8aa8a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/colorspaces-defs.rst
@@ -0,0 +1,175 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+****************************
+Defining Colorspaces in V4L2
+****************************
+
+In V4L2 colorspaces are defined by four values. The first is the
+colorspace identifier (enum :c:type:`v4l2_colorspace`)
+which defines the chromaticities, the default transfer function, the
+default Y'CbCr encoding and the default quantization method. The second
+is the transfer function identifier (enum
+:c:type:`v4l2_xfer_func`) to specify non-standard
+transfer functions. The third is the Y'CbCr encoding identifier (enum
+:c:type:`v4l2_ycbcr_encoding`) to specify
+non-standard Y'CbCr encodings and the fourth is the quantization
+identifier (enum :c:type:`v4l2_quantization`) to
+specify non-standard quantization methods. Most of the time only the
+colorspace field of struct :c:type:`v4l2_pix_format`
+or struct :c:type:`v4l2_pix_format_mplane`
+needs to be filled in.
+
+.. _hsv-colorspace:
+
+On :ref:`HSV formats <hsv-formats>` the *Hue* is defined as the angle on
+the cylindrical color representation. Usually this angle is measured in
+degrees, i.e. 0-360. When we map this angle value into 8 bits, there are
+two basic ways to do it: Divide the angular value by 2 (0-179), or use the
+whole range, 0-255, dividing the angular value by 1.41. The enum
+:c:type:`v4l2_hsv_encoding` specifies which encoding is used.
+
+.. note:: The default R'G'B' quantization is full range for all
+   colorspaces. HSV formats are always full range.
+
+.. tabularcolumns:: |p{6.7cm}|p{10.8cm}|
+
+.. c:type:: v4l2_colorspace
+
+.. flat-table:: V4L2 Colorspaces
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Identifier
+      - Details
+    * - ``V4L2_COLORSPACE_DEFAULT``
+      - The default colorspace. This can be used by applications to let
+	the driver fill in the colorspace.
+    * - ``V4L2_COLORSPACE_SMPTE170M``
+      - See :ref:`col-smpte-170m`.
+    * - ``V4L2_COLORSPACE_REC709``
+      - See :ref:`col-rec709`.
+    * - ``V4L2_COLORSPACE_SRGB``
+      - See :ref:`col-srgb`.
+    * - ``V4L2_COLORSPACE_OPRGB``
+      - See :ref:`col-oprgb`.
+    * - ``V4L2_COLORSPACE_BT2020``
+      - See :ref:`col-bt2020`.
+    * - ``V4L2_COLORSPACE_DCI_P3``
+      - See :ref:`col-dcip3`.
+    * - ``V4L2_COLORSPACE_SMPTE240M``
+      - See :ref:`col-smpte-240m`.
+    * - ``V4L2_COLORSPACE_470_SYSTEM_M``
+      - See :ref:`col-sysm`.
+    * - ``V4L2_COLORSPACE_470_SYSTEM_BG``
+      - See :ref:`col-sysbg`.
+    * - ``V4L2_COLORSPACE_JPEG``
+      - See :ref:`col-jpeg`.
+    * - ``V4L2_COLORSPACE_RAW``
+      - The raw colorspace. This is used for raw image capture where the
+	image is minimally processed and is using the internal colorspace
+	of the device. The software that processes an image using this
+	'colorspace' will have to know the internals of the capture
+	device.
+
+
+
+.. c:type:: v4l2_xfer_func
+
+.. tabularcolumns:: |p{5.5cm}|p{12.0cm}|
+
+.. flat-table:: V4L2 Transfer Function
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Identifier
+      - Details
+    * - ``V4L2_XFER_FUNC_DEFAULT``
+      - Use the default transfer function as defined by the colorspace.
+    * - ``V4L2_XFER_FUNC_709``
+      - Use the Rec. 709 transfer function.
+    * - ``V4L2_XFER_FUNC_SRGB``
+      - Use the sRGB transfer function.
+    * - ``V4L2_XFER_FUNC_OPRGB``
+      - Use the opRGB transfer function.
+    * - ``V4L2_XFER_FUNC_SMPTE240M``
+      - Use the SMPTE 240M transfer function.
+    * - ``V4L2_XFER_FUNC_NONE``
+      - Do not use a transfer function (i.e. use linear RGB values).
+    * - ``V4L2_XFER_FUNC_DCI_P3``
+      - Use the DCI-P3 transfer function.
+    * - ``V4L2_XFER_FUNC_SMPTE2084``
+      - Use the SMPTE 2084 transfer function. See :ref:`xf-smpte-2084`.
+
+
+
+.. c:type:: v4l2_ycbcr_encoding
+
+.. tabularcolumns:: |p{7.2cm}|p{10.3cm}|
+
+.. flat-table:: V4L2 Y'CbCr Encodings
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Identifier
+      - Details
+    * - ``V4L2_YCBCR_ENC_DEFAULT``
+      - Use the default Y'CbCr encoding as defined by the colorspace.
+    * - ``V4L2_YCBCR_ENC_601``
+      - Use the BT.601 Y'CbCr encoding.
+    * - ``V4L2_YCBCR_ENC_709``
+      - Use the Rec. 709 Y'CbCr encoding.
+    * - ``V4L2_YCBCR_ENC_XV601``
+      - Use the extended gamut xvYCC BT.601 encoding.
+    * - ``V4L2_YCBCR_ENC_XV709``
+      - Use the extended gamut xvYCC Rec. 709 encoding.
+    * - ``V4L2_YCBCR_ENC_BT2020``
+      - Use the default non-constant luminance BT.2020 Y'CbCr encoding.
+    * - ``V4L2_YCBCR_ENC_BT2020_CONST_LUM``
+      - Use the constant luminance BT.2020 Yc'CbcCrc encoding.
+    * - ``V4L2_YCBCR_ENC_SMPTE_240M``
+      - Use the SMPTE 240M Y'CbCr encoding.
+
+
+
+.. c:type:: v4l2_hsv_encoding
+
+.. tabularcolumns:: |p{6.5cm}|p{11.0cm}|
+
+.. flat-table:: V4L2 HSV Encodings
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Identifier
+      - Details
+    * - ``V4L2_HSV_ENC_180``
+      - For the Hue, each LSB is two degrees.
+    * - ``V4L2_HSV_ENC_256``
+      - For the Hue, the 360 degrees are mapped into 8 bits, i.e. each
+	LSB is roughly 1.41 degrees.
+
+
+
+.. c:type:: v4l2_quantization
+
+.. tabularcolumns:: |p{6.5cm}|p{11.0cm}|
+
+.. flat-table:: V4L2 Quantization Methods
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Identifier
+      - Details
+    * - ``V4L2_QUANTIZATION_DEFAULT``
+      - Use the default quantization encoding as defined by the
+	colorspace. This is always full range for R'G'B' and HSV.
+	It is usually limited range for Y'CbCr.
+    * - ``V4L2_QUANTIZATION_FULL_RANGE``
+      - Use the full range quantization encoding. I.e. the range [0…1] is
+	mapped to [0…255] (with possible clipping to [1…254] to avoid the
+	0x00 and 0xff values). Cb and Cr are mapped from [-0.5…0.5] to
+	[0…255] (with possible clipping to [1…254] to avoid the 0x00 and
+	0xff values).
+    * - ``V4L2_QUANTIZATION_LIM_RANGE``
+      - Use the limited range quantization encoding. I.e. the range [0…1]
+	is mapped to [16…235]. Cb and Cr are mapped from [-0.5…0.5] to
+	[16…240]. Limited Range cannot be used with HSV.
diff --git a/Documentation/userspace-api/media/v4l/colorspaces-details.rst b/Documentation/userspace-api/media/v4l/colorspaces-details.rst
new file mode 100644
index 000000000..014e7c9fc
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/colorspaces-details.rst
@@ -0,0 +1,805 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+********************************
+Detailed Colorspace Descriptions
+********************************
+
+
+.. _col-smpte-170m:
+
+Colorspace SMPTE 170M (V4L2_COLORSPACE_SMPTE170M)
+=================================================
+
+The :ref:`smpte170m` standard defines the colorspace used by NTSC and
+PAL and by SDTV in general. The default transfer function is
+``V4L2_XFER_FUNC_709``. The default Y'CbCr encoding is
+``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited
+range. The chromaticities of the primary colors and the white reference
+are:
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: SMPTE 170M Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.630
+      - 0.340
+    * - Green
+      - 0.310
+      - 0.595
+    * - Blue
+      - 0.155
+      - 0.070
+    * - White Reference (D65)
+      - 0.3127
+      - 0.3290
+
+
+The red, green and blue chromaticities are also often referred to as the
+SMPTE C set, so this colorspace is sometimes called SMPTE C as well.
+
+The transfer function defined for SMPTE 170M is the same as the one
+defined in Rec. 709.
+
+.. math::
+
+    L' = -1.099(-L)^{0.45} + 0.099 \text{, for } L \le-0.018
+
+    L' = 4.5L \text{, for } -0.018 < L < 0.018
+
+    L' = 1.099L^{0.45} - 0.099 \text{, for } L \ge 0.018
+
+Inverse Transfer function:
+
+.. math::
+
+    L = -\left( \frac{L' - 0.099}{-1.099} \right) ^{\frac{1}{0.45}} \text{, for } L' \le -0.081
+
+    L = \frac{L'}{4.5} \text{, for } -0.081 < L' < 0.081
+
+    L = \left(\frac{L' + 0.099}{1.099}\right)^{\frac{1}{0.45} } \text{, for } L' \ge 0.081
+
+The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following ``V4L2_YCBCR_ENC_601`` encoding:
+
+.. math::
+
+    Y' = 0.2990R' + 0.5870G' + 0.1140B'
+
+    Cb = -0.1687R' - 0.3313G' + 0.5B'
+
+    Cr = 0.5R' - 0.4187G' - 0.0813B'
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
+[-0.5…0.5]. This conversion to Y'CbCr is identical to the one defined in
+the :ref:`itu601` standard and this colorspace is sometimes called
+BT.601 as well, even though BT.601 does not mention any color primaries.
+
+The default quantization is limited range, but full range is possible
+although rarely seen.
+
+
+.. _col-rec709:
+
+Colorspace Rec. 709 (V4L2_COLORSPACE_REC709)
+============================================
+
+The :ref:`itu709` standard defines the colorspace used by HDTV in
+general. The default transfer function is ``V4L2_XFER_FUNC_709``. The
+default Y'CbCr encoding is ``V4L2_YCBCR_ENC_709``. The default Y'CbCr
+quantization is limited range. The chromaticities of the primary colors
+and the white reference are:
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: Rec. 709 Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.640
+      - 0.330
+    * - Green
+      - 0.300
+      - 0.600
+    * - Blue
+      - 0.150
+      - 0.060
+    * - White Reference (D65)
+      - 0.3127
+      - 0.3290
+
+
+The full name of this standard is Rec. ITU-R BT.709-5.
+
+Transfer function. Normally L is in the range [0…1], but for the
+extended gamut xvYCC encoding values outside that range are allowed.
+
+.. math::
+
+    L' = -1.099(-L)^{0.45} + 0.099 \text{, for } L \le -0.018
+
+    L' = 4.5L \text{, for } -0.018 < L < 0.018
+
+    L' = 1.099L^{0.45} - 0.099 \text{, for } L \ge 0.018
+
+Inverse Transfer function:
+
+.. math::
+
+    L = -\left( \frac{L' - 0.099}{-1.099} \right)^\frac{1}{0.45} \text{, for } L' \le -0.081
+
+    L = \frac{L'}{4.5}\text{, for } -0.081 < L' < 0.081
+
+    L = \left(\frac{L' + 0.099}{1.099}\right)^{\frac{1}{0.45} } \text{, for } L' \ge 0.081
+
+The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following ``V4L2_YCBCR_ENC_709`` encoding:
+
+.. math::
+
+    Y' = 0.2126R' + 0.7152G' + 0.0722B'
+
+    Cb = -0.1146R' - 0.3854G' + 0.5B'
+
+    Cr = 0.5R' - 0.4542G' - 0.0458B'
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
+[-0.5…0.5].
+
+The default quantization is limited range, but full range is possible
+although rarely seen.
+
+The ``V4L2_YCBCR_ENC_709`` encoding described above is the default for
+this colorspace, but it can be overridden with ``V4L2_YCBCR_ENC_601``,
+in which case the BT.601 Y'CbCr encoding is used.
+
+Two additional extended gamut Y'CbCr encodings are also possible with
+this colorspace:
+
+The xvYCC 709 encoding (``V4L2_YCBCR_ENC_XV709``, :ref:`xvycc`) is
+similar to the Rec. 709 encoding, but it allows for R', G' and B' values
+that are outside the range [0…1]. The resulting Y', Cb and Cr values are
+scaled and offset according to the limited range formula:
+
+.. math::
+
+    Y' = \frac{219}{256} * (0.2126R' + 0.7152G' + 0.0722B') + \frac{16}{256}
+
+    Cb = \frac{224}{256} * (-0.1146R' - 0.3854G' + 0.5B')
+
+    Cr = \frac{224}{256} * (0.5R' - 0.4542G' - 0.0458B')
+
+The xvYCC 601 encoding (``V4L2_YCBCR_ENC_XV601``, :ref:`xvycc`) is
+similar to the BT.601 encoding, but it allows for R', G' and B' values
+that are outside the range [0…1]. The resulting Y', Cb and Cr values are
+scaled and offset according to the limited range formula:
+
+.. math::
+
+    Y' = \frac{219}{256} * (0.2990R' + 0.5870G' + 0.1140B') + \frac{16}{256}
+
+    Cb = \frac{224}{256} * (-0.1687R' - 0.3313G' + 0.5B')
+
+    Cr = \frac{224}{256} * (0.5R' - 0.4187G' - 0.0813B')
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
+[-0.5…0.5] and quantized without further scaling or offsets.
+The non-standard xvYCC 709 or xvYCC 601 encodings can be
+used by selecting ``V4L2_YCBCR_ENC_XV709`` or ``V4L2_YCBCR_ENC_XV601``.
+As seen by the xvYCC formulas these encodings always use limited range quantization,
+there is no full range variant. The whole point of these extended gamut encodings
+is that values outside the limited range are still valid, although they
+map to R', G' and B' values outside the [0…1] range and are therefore outside
+the Rec. 709 colorspace gamut.
+
+
+.. _col-srgb:
+
+Colorspace sRGB (V4L2_COLORSPACE_SRGB)
+======================================
+
+The :ref:`srgb` standard defines the colorspace used by most webcams
+and computer graphics. The default transfer function is
+``V4L2_XFER_FUNC_SRGB``. The default Y'CbCr encoding is
+``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited range.
+
+Note that the :ref:`sycc` standard specifies full range quantization,
+however all current capture hardware supported by the kernel convert
+R'G'B' to limited range Y'CbCr. So choosing full range as the default
+would break how applications interpret the quantization range.
+
+The chromaticities of the primary colors and the white reference are:
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: sRGB Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.640
+      - 0.330
+    * - Green
+      - 0.300
+      - 0.600
+    * - Blue
+      - 0.150
+      - 0.060
+    * - White Reference (D65)
+      - 0.3127
+      - 0.3290
+
+
+These chromaticities are identical to the Rec. 709 colorspace.
+
+Transfer function. Note that negative values for L are only used by the
+Y'CbCr conversion.
+
+.. math::
+
+    L' = -1.055(-L)^{\frac{1}{2.4} } + 0.055\text{, for }L < -0.0031308
+
+    L' = 12.92L\text{, for }-0.0031308 \le L \le 0.0031308
+
+    L' = 1.055L ^{\frac{1}{2.4} } - 0.055\text{, for }0.0031308 < L \le 1
+
+Inverse Transfer function:
+
+.. math::
+
+    L = -((-L' + 0.055) / 1.055) ^{2.4}\text{, for }L' < -0.04045
+
+    L = L' / 12.92\text{, for }-0.04045 \le L' \le 0.04045
+
+    L = ((L' + 0.055) / 1.055) ^{2.4}\text{, for }L' > 0.04045
+
+The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following ``V4L2_YCBCR_ENC_601`` encoding as defined by :ref:`sycc`:
+
+.. math::
+
+    Y' = 0.2990R' + 0.5870G' + 0.1140B'
+
+    Cb = -0.1687R' - 0.3313G' + 0.5B'
+
+    Cr = 0.5R' - 0.4187G' - 0.0813B'
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
+[-0.5…0.5]. This transform is identical to one defined in SMPTE
+170M/BT.601. The Y'CbCr quantization is limited range.
+
+
+.. _col-oprgb:
+
+Colorspace opRGB (V4L2_COLORSPACE_OPRGB)
+===============================================
+
+The :ref:`oprgb` standard defines the colorspace used by computer
+graphics that use the opRGB colorspace. The default transfer function is
+``V4L2_XFER_FUNC_OPRGB``. The default Y'CbCr encoding is
+``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited
+range.
+
+Note that the :ref:`oprgb` standard specifies full range quantization,
+however all current capture hardware supported by the kernel convert
+R'G'B' to limited range Y'CbCr. So choosing full range as the default
+would break how applications interpret the quantization range.
+
+The chromaticities of the primary colors and the white reference are:
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: opRGB Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.6400
+      - 0.3300
+    * - Green
+      - 0.2100
+      - 0.7100
+    * - Blue
+      - 0.1500
+      - 0.0600
+    * - White Reference (D65)
+      - 0.3127
+      - 0.3290
+
+
+
+Transfer function:
+
+.. math::
+
+    L' = L ^{\frac{1}{2.19921875}}
+
+Inverse Transfer function:
+
+.. math::
+
+    L = L'^{(2.19921875)}
+
+The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following ``V4L2_YCBCR_ENC_601`` encoding:
+
+.. math::
+
+    Y' = 0.2990R' + 0.5870G' + 0.1140B'
+
+    Cb = -0.1687R' - 0.3313G' + 0.5B'
+
+    Cr = 0.5R' - 0.4187G' - 0.0813B'
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
+[-0.5…0.5]. This transform is identical to one defined in SMPTE
+170M/BT.601. The Y'CbCr quantization is limited range.
+
+
+.. _col-bt2020:
+
+Colorspace BT.2020 (V4L2_COLORSPACE_BT2020)
+===========================================
+
+The :ref:`itu2020` standard defines the colorspace used by Ultra-high
+definition television (UHDTV). The default transfer function is
+``V4L2_XFER_FUNC_709``. The default Y'CbCr encoding is
+``V4L2_YCBCR_ENC_BT2020``. The default Y'CbCr quantization is limited range.
+The chromaticities of the primary colors and the white reference are:
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: BT.2020 Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.708
+      - 0.292
+    * - Green
+      - 0.170
+      - 0.797
+    * - Blue
+      - 0.131
+      - 0.046
+    * - White Reference (D65)
+      - 0.3127
+      - 0.3290
+
+
+
+Transfer function (same as Rec. 709):
+
+.. math::
+
+    L' = 4.5L\text{, for }0 \le L < 0.018
+
+    L' = 1.099L ^{0.45} - 0.099\text{, for } 0.018 \le L \le 1
+
+Inverse Transfer function:
+
+.. math::
+
+    L = L' / 4.5\text{, for } L' < 0.081
+
+    L = \left( \frac{L' + 0.099}{1.099}\right) ^{\frac{1}{0.45} }\text{, for } L' \ge 0.081
+
+Please note that while Rec. 709 is defined as the default transfer function
+by the :ref:`itu2020` standard, in practice this colorspace is often used
+with the :ref:`xf-smpte-2084`. In particular Ultra HD Blu-ray discs use
+this combination.
+
+The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following ``V4L2_YCBCR_ENC_BT2020`` encoding:
+
+.. math::
+
+    Y' = 0.2627R' + 0.6780G' + 0.0593B'
+
+    Cb = -0.1396R' - 0.3604G' + 0.5B'
+
+    Cr = 0.5R' - 0.4598G' - 0.0402B'
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
+[-0.5…0.5]. The Y'CbCr quantization is limited range.
+
+There is also an alternate constant luminance R'G'B' to Yc'CbcCrc
+(``V4L2_YCBCR_ENC_BT2020_CONST_LUM``) encoding:
+
+Luma:
+
+.. math::
+    :nowrap:
+
+    \begin{align*}
+    Yc' = (0.2627R + 0.6780G + 0.0593B)'& \\
+    B' - Yc' \le 0:& \\
+        &Cbc = (B' - Yc') / 1.9404 \\
+    B' - Yc' > 0: & \\
+        &Cbc = (B' - Yc') / 1.5816 \\
+    R' - Yc' \le 0:& \\
+        &Crc = (R' - Y') / 1.7184 \\
+    R' - Yc' > 0:& \\
+        &Crc = (R' - Y') / 0.9936
+    \end{align*}
+
+Yc' is clamped to the range [0…1] and Cbc and Crc are clamped to the
+range [-0.5…0.5]. The Yc'CbcCrc quantization is limited range.
+
+
+.. _col-dcip3:
+
+Colorspace DCI-P3 (V4L2_COLORSPACE_DCI_P3)
+==========================================
+
+The :ref:`smpte431` standard defines the colorspace used by cinema
+projectors that use the DCI-P3 colorspace. The default transfer function
+is ``V4L2_XFER_FUNC_DCI_P3``. The default Y'CbCr encoding is
+``V4L2_YCBCR_ENC_709``. The default Y'CbCr quantization is limited range.
+
+.. note::
+
+   Note that this colorspace standard does not specify a
+   Y'CbCr encoding since it is not meant to be encoded to Y'CbCr. So this
+   default Y'CbCr encoding was picked because it is the HDTV encoding.
+
+The chromaticities of the primary colors and the white reference are:
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: DCI-P3 Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.6800
+      - 0.3200
+    * - Green
+      - 0.2650
+      - 0.6900
+    * - Blue
+      - 0.1500
+      - 0.0600
+    * - White Reference
+      - 0.3140
+      - 0.3510
+
+
+
+Transfer function:
+
+.. math::
+
+    L' = L^{\frac{1}{2.6}}
+
+Inverse Transfer function:
+
+.. math::
+
+    L = L'^{(2.6)}
+
+Y'CbCr encoding is not specified. V4L2 defaults to Rec. 709.
+
+
+.. _col-smpte-240m:
+
+Colorspace SMPTE 240M (V4L2_COLORSPACE_SMPTE240M)
+=================================================
+
+The :ref:`smpte240m` standard was an interim standard used during the
+early days of HDTV (1988-1998). It has been superseded by Rec. 709. The
+default transfer function is ``V4L2_XFER_FUNC_SMPTE240M``. The default
+Y'CbCr encoding is ``V4L2_YCBCR_ENC_SMPTE240M``. The default Y'CbCr
+quantization is limited range. The chromaticities of the primary colors
+and the white reference are:
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: SMPTE 240M Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.630
+      - 0.340
+    * - Green
+      - 0.310
+      - 0.595
+    * - Blue
+      - 0.155
+      - 0.070
+    * - White Reference (D65)
+      - 0.3127
+      - 0.3290
+
+
+These chromaticities are identical to the SMPTE 170M colorspace.
+
+Transfer function:
+
+.. math::
+
+    L' = 4L\text{, for } 0 \le L < 0.0228
+
+    L' = 1.1115L ^{0.45} - 0.1115\text{, for } 0.0228 \le L \le 1
+
+Inverse Transfer function:
+
+.. math::
+
+    L = \frac{L'}{4}\text{, for } 0 \le L' < 0.0913
+
+    L = \left( \frac{L' + 0.1115}{1.1115}\right) ^{\frac{1}{0.45} }\text{, for } L' \ge 0.0913
+
+The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following ``V4L2_YCBCR_ENC_SMPTE240M`` encoding:
+
+.. math::
+
+    Y' = 0.2122R' + 0.7013G' + 0.0865B'
+
+    Cb = -0.1161R' - 0.3839G' + 0.5B'
+
+    Cr = 0.5R' - 0.4451G' - 0.0549B'
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the
+range [-0.5…0.5]. The Y'CbCr quantization is limited range.
+
+
+.. _col-sysm:
+
+Colorspace NTSC 1953 (V4L2_COLORSPACE_470_SYSTEM_M)
+===================================================
+
+This standard defines the colorspace used by NTSC in 1953. In practice
+this colorspace is obsolete and SMPTE 170M should be used instead. The
+default transfer function is ``V4L2_XFER_FUNC_709``. The default Y'CbCr
+encoding is ``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is
+limited range. The chromaticities of the primary colors and the white
+reference are:
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: NTSC 1953 Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.67
+      - 0.33
+    * - Green
+      - 0.21
+      - 0.71
+    * - Blue
+      - 0.14
+      - 0.08
+    * - White Reference (C)
+      - 0.310
+      - 0.316
+
+
+.. note::
+
+   This colorspace uses Illuminant C instead of D65 as the white
+   reference. To correctly convert an image in this colorspace to another
+   that uses D65 you need to apply a chromatic adaptation algorithm such as
+   the Bradford method.
+
+The transfer function was never properly defined for NTSC 1953. The Rec.
+709 transfer function is recommended in the literature:
+
+.. math::
+
+    L' = 4.5L\text{, for } 0 \le L < 0.018
+
+    L' = 1.099L ^{0.45} - 0.099\text{, for } 0.018 \le L \le 1
+
+Inverse Transfer function:
+
+.. math::
+
+    L = \frac{L'}{4.5} \text{, for } L' < 0.081
+
+    L = \left( \frac{L' + 0.099}{1.099}\right) ^{\frac{1}{0.45} }\text{, for } L' \ge 0.081
+
+The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following ``V4L2_YCBCR_ENC_601`` encoding:
+
+.. math::
+
+    Y' = 0.2990R' + 0.5870G' + 0.1140B'
+
+    Cb = -0.1687R' - 0.3313G' + 0.5B'
+
+    Cr = 0.5R' - 0.4187G' - 0.0813B'
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
+[-0.5…0.5]. The Y'CbCr quantization is limited range. This transform is
+identical to one defined in SMPTE 170M/BT.601.
+
+
+.. _col-sysbg:
+
+Colorspace EBU Tech. 3213 (V4L2_COLORSPACE_470_SYSTEM_BG)
+=========================================================
+
+The :ref:`tech3213` standard defines the colorspace used by PAL/SECAM
+in 1975. In practice this colorspace is obsolete and SMPTE 170M should
+be used instead. The default transfer function is
+``V4L2_XFER_FUNC_709``. The default Y'CbCr encoding is
+``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited
+range. The chromaticities of the primary colors and the white reference
+are:
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: EBU Tech. 3213 Chromaticities
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Color
+      - x
+      - y
+    * - Red
+      - 0.64
+      - 0.33
+    * - Green
+      - 0.29
+      - 0.60
+    * - Blue
+      - 0.15
+      - 0.06
+    * - White Reference (D65)
+      - 0.3127
+      - 0.3290
+
+
+
+The transfer function was never properly defined for this colorspace.
+The Rec. 709 transfer function is recommended in the literature:
+
+.. math::
+
+    L' = 4.5L\text{, for } 0 \le L < 0.018
+
+    L' = 1.099L ^{0.45} - 0.099\text{, for } 0.018 \le L \le 1
+
+Inverse Transfer function:
+
+.. math::
+
+    L = \frac{L'}{4.5} \text{, for } L' < 0.081
+
+    L = \left(\frac{L' + 0.099}{1.099} \right) ^{\frac{1}{0.45} }\text{, for } L' \ge 0.081
+
+The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following ``V4L2_YCBCR_ENC_601`` encoding:
+
+.. math::
+
+    Y' = 0.2990R' + 0.5870G' + 0.1140B'
+
+    Cb = -0.1687R' - 0.3313G' + 0.5B'
+
+    Cr = 0.5R' - 0.4187G' - 0.0813B'
+
+Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
+[-0.5…0.5]. The Y'CbCr quantization is limited range. This transform is
+identical to one defined in SMPTE 170M/BT.601.
+
+
+.. _col-jpeg:
+
+Colorspace JPEG (V4L2_COLORSPACE_JPEG)
+======================================
+
+This colorspace defines the colorspace used by most (Motion-)JPEG
+formats. The chromaticities of the primary colors and the white
+reference are identical to sRGB. The transfer function use is
+``V4L2_XFER_FUNC_SRGB``. The Y'CbCr encoding is ``V4L2_YCBCR_ENC_601``
+with full range quantization where Y' is scaled to [0…255] and Cb/Cr are
+scaled to [-128…128] and then clipped to [-128…127].
+
+.. note::
+
+   The JPEG standard does not actually store colorspace
+   information. So if something other than sRGB is used, then the driver
+   will have to set that information explicitly. Effectively
+   ``V4L2_COLORSPACE_JPEG`` can be considered to be an abbreviation for
+   ``V4L2_COLORSPACE_SRGB``, ``V4L2_XFER_FUNC_SRGB``, ``V4L2_YCBCR_ENC_601``
+   and ``V4L2_QUANTIZATION_FULL_RANGE``.
+
+***************************************
+Detailed Transfer Function Descriptions
+***************************************
+
+.. _xf-smpte-2084:
+
+Transfer Function SMPTE 2084 (V4L2_XFER_FUNC_SMPTE2084)
+=======================================================
+
+The :ref:`smpte2084` standard defines the transfer function used by
+High Dynamic Range content.
+
+Constants:
+    m1 = (2610 / 4096) / 4
+
+    m2 = (2523 / 4096) * 128
+
+    c1 = 3424 / 4096
+
+    c2 = (2413 / 4096) * 32
+
+    c3 = (2392 / 4096) * 32
+
+Transfer function:
+    L' = ((c1 + c2 * L\ :sup:`m1`) / (1 + c3 * L\ :sup:`m1`))\ :sup:`m2`
+
+Inverse Transfer function:
+    L = (max(L':sup:`1/m2` - c1, 0) / (c2 - c3 *
+    L'\ :sup:`1/m2`))\ :sup:`1/m1`
+
+Take care when converting between this transfer function and non-HDR transfer
+functions: the linear RGB values [0…1] of HDR content map to a luminance range
+of 0 to 10000 cd/m\ :sup:`2` whereas the linear RGB values of non-HDR (aka
+Standard Dynamic Range or SDR) map to a luminance range of 0 to 100 cd/m\ :sup:`2`.
+
+To go from SDR to HDR you will have to divide L by 100 first. To go in the other
+direction you will have to multiply L by 100. Of course, this clamps all
+luminance values over 100 cd/m\ :sup:`2` to 100 cd/m\ :sup:`2`.
+
+There are better methods, see e.g. :ref:`colimg` for more in-depth information
+about this.
diff --git a/Documentation/userspace-api/media/v4l/colorspaces.rst b/Documentation/userspace-api/media/v4l/colorspaces.rst
new file mode 100644
index 000000000..2aa0dda4f
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/colorspaces.rst
@@ -0,0 +1,163 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _colorspaces:
+
+***********
+Colorspaces
+***********
+
+'Color' is a very complex concept and depends on physics, chemistry and
+biology. Just because you have three numbers that describe the 'red',
+'green' and 'blue' components of the color of a pixel does not mean that
+you can accurately display that color. A colorspace defines what it
+actually *means* to have an RGB value of e.g. (255, 0, 0). That is,
+which color should be reproduced on the screen in a perfectly calibrated
+environment.
+
+In order to do that we first need to have a good definition of color,
+i.e. some way to uniquely and unambiguously define a color so that
+someone else can reproduce it. Human color vision is trichromatic since
+the human eye has color receptors that are sensitive to three different
+wavelengths of light. Hence the need to use three numbers to describe
+color. Be glad you are not a mantis shrimp as those are sensitive to 12
+different wavelengths, so instead of RGB we would be using the
+ABCDEFGHIJKL colorspace...
+
+Color exists only in the eye and brain and is the result of how strongly
+color receptors are stimulated. This is based on the Spectral Power
+Distribution (SPD) which is a graph showing the intensity (radiant
+power) of the light at wavelengths covering the visible spectrum as it
+enters the eye. The science of colorimetry is about the relationship
+between the SPD and color as perceived by the human brain.
+
+Since the human eye has only three color receptors it is perfectly
+possible that different SPDs will result in the same stimulation of
+those receptors and are perceived as the same color, even though the SPD
+of the light is different.
+
+In the 1920s experiments were devised to determine the relationship
+between SPDs and the perceived color and that resulted in the CIE 1931
+standard that defines spectral weighting functions that model the
+perception of color. Specifically that standard defines functions that
+can take an SPD and calculate the stimulus for each color receptor.
+After some further mathematical transforms these stimuli are known as
+the *CIE XYZ tristimulus* values and these X, Y and Z values describe a
+color as perceived by a human unambiguously. These X, Y and Z values are
+all in the range [0…1].
+
+The Y value in the CIE XYZ colorspace corresponds to luminance. Often
+the CIE XYZ colorspace is transformed to the normalized CIE xyY
+colorspace:
+
+	x = X / (X + Y + Z)
+
+	y = Y / (X + Y + Z)
+
+The x and y values are the chromaticity coordinates and can be used to
+define a color without the luminance component Y. It is very confusing
+to have such similar names for these colorspaces. Just be aware that if
+colors are specified with lower case 'x' and 'y', then the CIE xyY
+colorspace is used. Upper case 'X' and 'Y' refer to the CIE XYZ
+colorspace. Also, y has nothing to do with luminance. Together x and y
+specify a color, and Y the luminance. That is really all you need to
+remember from a practical point of view. At the end of this section you
+will find reading resources that go into much more detail if you are
+interested.
+
+A monitor or TV will reproduce colors by emitting light at three
+different wavelengths, the combination of which will stimulate the color
+receptors in the eye and thus cause the perception of color.
+Historically these wavelengths were defined by the red, green and blue
+phosphors used in the displays. These *color primaries* are part of what
+defines a colorspace.
+
+Different display devices will have different primaries and some
+primaries are more suitable for some display technologies than others.
+This has resulted in a variety of colorspaces that are used for
+different display technologies or uses. To define a colorspace you need
+to define the three color primaries (these are typically defined as x, y
+chromaticity coordinates from the CIE xyY colorspace) but also the white
+reference: that is the color obtained when all three primaries are at
+maximum power. This determines the relative power or energy of the
+primaries. This is usually chosen to be close to daylight which has been
+defined as the CIE D65 Illuminant.
+
+To recapitulate: the CIE XYZ colorspace uniquely identifies colors.
+Other colorspaces are defined by three chromaticity coordinates defined
+in the CIE xyY colorspace. Based on those a 3x3 matrix can be
+constructed that transforms CIE XYZ colors to colors in the new
+colorspace.
+
+Both the CIE XYZ and the RGB colorspace that are derived from the
+specific chromaticity primaries are linear colorspaces. But neither the
+eye, nor display technology is linear. Doubling the values of all
+components in the linear colorspace will not be perceived as twice the
+intensity of the color. So each colorspace also defines a transfer
+function that takes a linear color component value and transforms it to
+the non-linear component value, which is a closer match to the
+non-linear performance of both the eye and displays. Linear component
+values are denoted RGB, non-linear are denoted as R'G'B'. In general
+colors used in graphics are all R'G'B', except in openGL which uses
+linear RGB. Special care should be taken when dealing with openGL to
+provide linear RGB colors or to use the built-in openGL support to apply
+the inverse transfer function.
+
+The final piece that defines a colorspace is a function that transforms
+non-linear R'G'B' to non-linear Y'CbCr. This function is determined by
+the so-called luma coefficients. There may be multiple possible Y'CbCr
+encodings allowed for the same colorspace. Many encodings of color
+prefer to use luma (Y') and chroma (CbCr) instead of R'G'B'. Since the
+human eye is more sensitive to differences in luminance than in color
+this encoding allows one to reduce the amount of color information
+compared to the luma data. Note that the luma (Y') is unrelated to the Y
+in the CIE XYZ colorspace. Also note that Y'CbCr is often called YCbCr
+or YUV even though these are strictly speaking wrong.
+
+Sometimes people confuse Y'CbCr as being a colorspace. This is not
+correct, it is just an encoding of an R'G'B' color into luma and chroma
+values. The underlying colorspace that is associated with the R'G'B'
+color is also associated with the Y'CbCr color.
+
+The final step is how the RGB, R'G'B' or Y'CbCr values are quantized.
+The CIE XYZ colorspace where X, Y and Z are in the range [0…1] describes
+all colors that humans can perceive, but the transform to another
+colorspace will produce colors that are outside the [0…1] range. Once
+clamped to the [0…1] range those colors can no longer be reproduced in
+that colorspace. This clamping is what reduces the extent or gamut of
+the colorspace. How the range of [0…1] is translated to integer values
+in the range of [0…255] (or higher, depending on the color depth) is
+called the quantization. This is *not* part of the colorspace
+definition. In practice RGB or R'G'B' values are full range, i.e. they
+use the full [0…255] range. Y'CbCr values on the other hand are limited
+range with Y' using [16…235] and Cb and Cr using [16…240].
+
+Unfortunately, in some cases limited range RGB is also used where the
+components use the range [16…235]. And full range Y'CbCr also exists
+using the [0…255] range.
+
+In order to correctly interpret a color you need to know the
+quantization range, whether it is R'G'B' or Y'CbCr, the used Y'CbCr
+encoding and the colorspace. From that information you can calculate the
+corresponding CIE XYZ color and map that again to whatever colorspace
+your display device uses.
+
+The colorspace definition itself consists of the three chromaticity
+primaries, the white reference chromaticity, a transfer function and the
+luma coefficients needed to transform R'G'B' to Y'CbCr. While some
+colorspace standards correctly define all four, quite often the
+colorspace standard only defines some, and you have to rely on other
+standards for the missing pieces. The fact that colorspaces are often a
+mix of different standards also led to very confusing naming conventions
+where the name of a standard was used to name a colorspace when in fact
+that standard was part of various other colorspaces as well.
+
+If you want to read more about colors and colorspaces, then the
+following resources are useful: :ref:`poynton` is a good practical
+book for video engineers, :ref:`colimg` has a much broader scope and
+describes many more aspects of color (physics, chemistry, biology,
+etc.). The
+`http://www.brucelindbloom.com <http://www.brucelindbloom.com>`__
+website is an excellent resource, especially with respect to the
+mathematics behind colorspace conversions. The wikipedia
+`CIE 1931 colorspace <http://en.wikipedia.org/wiki/CIE_1931_color_space#CIE_xy_chromaticity_diagram_and_the_CIE_xyY_color_space>`__
+article is also very useful.
diff --git a/Documentation/userspace-api/media/v4l/common-defs.rst b/Documentation/userspace-api/media/v4l/common-defs.rst
new file mode 100644
index 000000000..6ae42ac7d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/common-defs.rst
@@ -0,0 +1,13 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _common-defs:
+
+******************************************************
+Common definitions for V4L2 and V4L2 subdev interfaces
+******************************************************
+
+
+.. toctree::
+    :maxdepth: 1
+
+    selections-common
diff --git a/Documentation/userspace-api/media/v4l/common.rst b/Documentation/userspace-api/media/v4l/common.rst
new file mode 100644
index 000000000..d84aeb703
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/common.rst
@@ -0,0 +1,58 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _common:
+
+###################
+Common API Elements
+###################
+Programming a V4L2 device consists of these steps:
+
+-  Opening the device
+
+-  Changing device properties, selecting a video and audio input, video
+   standard, picture brightness a. o.
+
+-  Negotiating a data format
+
+-  Negotiating an input/output method
+
+-  The actual input/output loop
+
+-  Closing the device
+
+In practice most steps are optional and can be executed out of order. It
+depends on the V4L2 device type, you can read about the details in
+:ref:`devices`. In this chapter we will discuss the basic concepts
+applicable to all devices.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    open
+    querycap
+    app-pri
+    video
+    audio
+    tuner
+    standard
+    dv-timings
+    control
+    extended-controls
+    ext-ctrls-camera
+    ext-ctrls-flash
+    ext-ctrls-image-source
+    ext-ctrls-image-process
+    ext-ctrls-codec
+    ext-ctrls-jpeg
+    ext-ctrls-dv
+    ext-ctrls-rf-tuner
+    ext-ctrls-fm-tx
+    ext-ctrls-fm-rx
+    ext-ctrls-detect
+    fourcc
+    format
+    planar-apis
+    selection-api
+    crop
+    streaming-par
diff --git a/Documentation/userspace-api/media/v4l/compat.rst b/Documentation/userspace-api/media/v4l/compat.rst
new file mode 100644
index 000000000..b63b8392d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/compat.rst
@@ -0,0 +1,18 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _compat:
+
+*******
+Changes
+*******
+
+The following chapters document the evolution of the V4L2 API, errata or
+extensions. They are also intended to help application and driver
+writers to port or update their code.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    diff-v4l
+    hist-v4l2
diff --git a/Documentation/userspace-api/media/v4l/constraints.svg b/Documentation/userspace-api/media/v4l/constraints.svg
new file mode 100644
index 000000000..ac5f82bc6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/constraints.svg
@@ -0,0 +1,11 @@
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diff --git a/Documentation/userspace-api/media/v4l/control.rst b/Documentation/userspace-api/media/v4l/control.rst
new file mode 100644
index 000000000..4e5652eb6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/control.rst
@@ -0,0 +1,505 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _control:
+
+*************
+User Controls
+*************
+
+Devices typically have a number of user-settable controls such as
+brightness, saturation and so on, which would be presented to the user
+on a graphical user interface. But, different devices will have
+different controls available, and furthermore, the range of possible
+values, and the default value will vary from device to device. The
+control ioctls provide the information and a mechanism to create a nice
+user interface for these controls that will work correctly with any
+device.
+
+All controls are accessed using an ID value. V4L2 defines several IDs
+for specific purposes. Drivers can also implement their own custom
+controls using ``V4L2_CID_PRIVATE_BASE``  [#f1]_ and higher values. The
+pre-defined control IDs have the prefix ``V4L2_CID_``, and are listed in
+:ref:`control-id`. The ID is used when querying the attributes of a
+control, and when getting or setting the current value.
+
+Generally applications should present controls to the user without
+assumptions about their purpose. Each control comes with a name string
+the user is supposed to understand. When the purpose is non-intuitive
+the driver writer should provide a user manual, a user interface plug-in
+or a driver specific panel application. Predefined IDs were introduced
+to change a few controls programmatically, for example to mute a device
+during a channel switch.
+
+Drivers may enumerate different controls after switching the current
+video input or output, tuner or modulator, or audio input or output.
+Different in the sense of other bounds, another default and current
+value, step size or other menu items. A control with a certain *custom*
+ID can also change name and type.
+
+If a control is not applicable to the current configuration of the
+device (for example, it doesn't apply to the current video input)
+drivers set the ``V4L2_CTRL_FLAG_INACTIVE`` flag.
+
+Control values are stored globally, they do not change when switching
+except to stay within the reported bounds. They also do not change e. g.
+when the device is opened or closed, when the tuner radio frequency is
+changed or generally never without application request.
+
+V4L2 specifies an event mechanism to notify applications when controls
+change value (see
+:ref:`VIDIOC_SUBSCRIBE_EVENT`, event
+``V4L2_EVENT_CTRL``), panel applications might want to make use of that
+in order to always reflect the correct control value.
+
+All controls use machine endianness.
+
+
+.. _control-id:
+
+Control IDs
+===========
+
+``V4L2_CID_BASE``
+    First predefined ID, equal to ``V4L2_CID_BRIGHTNESS``.
+
+``V4L2_CID_USER_BASE``
+    Synonym of ``V4L2_CID_BASE``.
+
+``V4L2_CID_BRIGHTNESS`` ``(integer)``
+    Picture brightness, or more precisely, the black level.
+
+``V4L2_CID_CONTRAST`` ``(integer)``
+    Picture contrast or luma gain.
+
+``V4L2_CID_SATURATION`` ``(integer)``
+    Picture color saturation or chroma gain.
+
+``V4L2_CID_HUE`` ``(integer)``
+    Hue or color balance.
+
+``V4L2_CID_AUDIO_VOLUME`` ``(integer)``
+    Overall audio volume. Note some drivers also provide an OSS or ALSA
+    mixer interface.
+
+``V4L2_CID_AUDIO_BALANCE`` ``(integer)``
+    Audio stereo balance. Minimum corresponds to all the way left,
+    maximum to right.
+
+``V4L2_CID_AUDIO_BASS`` ``(integer)``
+    Audio bass adjustment.
+
+``V4L2_CID_AUDIO_TREBLE`` ``(integer)``
+    Audio treble adjustment.
+
+``V4L2_CID_AUDIO_MUTE`` ``(boolean)``
+    Mute audio, i. e. set the volume to zero, however without affecting
+    ``V4L2_CID_AUDIO_VOLUME``. Like ALSA drivers, V4L2 drivers must mute
+    at load time to avoid excessive noise. Actually the entire device
+    should be reset to a low power consumption state.
+
+``V4L2_CID_AUDIO_LOUDNESS`` ``(boolean)``
+    Loudness mode (bass boost).
+
+``V4L2_CID_BLACK_LEVEL`` ``(integer)``
+    Another name for brightness (not a synonym of
+    ``V4L2_CID_BRIGHTNESS``). This control is deprecated and should not
+    be used in new drivers and applications.
+
+``V4L2_CID_AUTO_WHITE_BALANCE`` ``(boolean)``
+    Automatic white balance (cameras).
+
+``V4L2_CID_DO_WHITE_BALANCE`` ``(button)``
+    This is an action control. When set (the value is ignored), the
+    device will do a white balance and then hold the current setting.
+    Contrast this with the boolean ``V4L2_CID_AUTO_WHITE_BALANCE``,
+    which, when activated, keeps adjusting the white balance.
+
+``V4L2_CID_RED_BALANCE`` ``(integer)``
+    Red chroma balance.
+
+``V4L2_CID_BLUE_BALANCE`` ``(integer)``
+    Blue chroma balance.
+
+``V4L2_CID_GAMMA`` ``(integer)``
+    Gamma adjust.
+
+``V4L2_CID_WHITENESS`` ``(integer)``
+    Whiteness for grey-scale devices. This is a synonym for
+    ``V4L2_CID_GAMMA``. This control is deprecated and should not be
+    used in new drivers and applications.
+
+``V4L2_CID_EXPOSURE`` ``(integer)``
+    Exposure (cameras). [Unit?]
+
+``V4L2_CID_AUTOGAIN`` ``(boolean)``
+    Automatic gain/exposure control.
+
+``V4L2_CID_GAIN`` ``(integer)``
+    Gain control.
+
+    Primarily used to control gain on e.g. TV tuners but also on
+    webcams. Most devices control only digital gain with this control
+    but on some this could include analogue gain as well. Devices that
+    recognise the difference between digital and analogue gain use
+    controls ``V4L2_CID_DIGITAL_GAIN`` and ``V4L2_CID_ANALOGUE_GAIN``.
+
+``V4L2_CID_HFLIP`` ``(boolean)``
+    Mirror the picture horizontally.
+
+``V4L2_CID_VFLIP`` ``(boolean)``
+    Mirror the picture vertically.
+
+.. _v4l2-power-line-frequency:
+
+``V4L2_CID_POWER_LINE_FREQUENCY`` ``(enum)``
+    Enables a power line frequency filter to avoid flicker. Possible
+    values for ``enum v4l2_power_line_frequency`` are:
+    ``V4L2_CID_POWER_LINE_FREQUENCY_DISABLED`` (0),
+    ``V4L2_CID_POWER_LINE_FREQUENCY_50HZ`` (1),
+    ``V4L2_CID_POWER_LINE_FREQUENCY_60HZ`` (2) and
+    ``V4L2_CID_POWER_LINE_FREQUENCY_AUTO`` (3).
+
+``V4L2_CID_HUE_AUTO`` ``(boolean)``
+    Enables automatic hue control by the device. The effect of setting
+    ``V4L2_CID_HUE`` while automatic hue control is enabled is
+    undefined, drivers should ignore such request.
+
+``V4L2_CID_WHITE_BALANCE_TEMPERATURE`` ``(integer)``
+    This control specifies the white balance settings as a color
+    temperature in Kelvin. A driver should have a minimum of 2800
+    (incandescent) to 6500 (daylight). For more information about color
+    temperature see
+    `Wikipedia <http://en.wikipedia.org/wiki/Color_temperature>`__.
+
+``V4L2_CID_SHARPNESS`` ``(integer)``
+    Adjusts the sharpness filters in a camera. The minimum value
+    disables the filters, higher values give a sharper picture.
+
+``V4L2_CID_BACKLIGHT_COMPENSATION`` ``(integer)``
+    Adjusts the backlight compensation in a camera. The minimum value
+    disables backlight compensation.
+
+``V4L2_CID_CHROMA_AGC`` ``(boolean)``
+    Chroma automatic gain control.
+
+``V4L2_CID_CHROMA_GAIN`` ``(integer)``
+    Adjusts the Chroma gain control (for use when chroma AGC is
+    disabled).
+
+``V4L2_CID_COLOR_KILLER`` ``(boolean)``
+    Enable the color killer (i. e. force a black & white image in case
+    of a weak video signal).
+
+.. _v4l2-colorfx:
+
+``V4L2_CID_COLORFX`` ``(enum)``
+    Selects a color effect. The following values are defined:
+
+
+
+.. tabularcolumns:: |p{5.5cm}|p{12cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 11 24
+
+    * - ``V4L2_COLORFX_NONE``
+      - Color effect is disabled.
+    * - ``V4L2_COLORFX_ANTIQUE``
+      - An aging (old photo) effect.
+    * - ``V4L2_COLORFX_ART_FREEZE``
+      - Frost color effect.
+    * - ``V4L2_COLORFX_AQUA``
+      - Water color, cool tone.
+    * - ``V4L2_COLORFX_BW``
+      - Black and white.
+    * - ``V4L2_COLORFX_EMBOSS``
+      - Emboss, the highlights and shadows replace light/dark boundaries
+	and low contrast areas are set to a gray background.
+    * - ``V4L2_COLORFX_GRASS_GREEN``
+      - Grass green.
+    * - ``V4L2_COLORFX_NEGATIVE``
+      - Negative.
+    * - ``V4L2_COLORFX_SEPIA``
+      - Sepia tone.
+    * - ``V4L2_COLORFX_SKETCH``
+      - Sketch.
+    * - ``V4L2_COLORFX_SKIN_WHITEN``
+      - Skin whiten.
+    * - ``V4L2_COLORFX_SKY_BLUE``
+      - Sky blue.
+    * - ``V4L2_COLORFX_SOLARIZATION``
+      - Solarization, the image is partially reversed in tone, only color
+	values above or below a certain threshold are inverted.
+    * - ``V4L2_COLORFX_SILHOUETTE``
+      - Silhouette (outline).
+    * - ``V4L2_COLORFX_VIVID``
+      - Vivid colors.
+    * - ``V4L2_COLORFX_SET_CBCR``
+      - The Cb and Cr chroma components are replaced by fixed coefficients
+	determined by ``V4L2_CID_COLORFX_CBCR`` control.
+
+
+
+``V4L2_CID_COLORFX_CBCR`` ``(integer)``
+    Determines the Cb and Cr coefficients for ``V4L2_COLORFX_SET_CBCR``
+    color effect. Bits [7:0] of the supplied 32 bit value are
+    interpreted as Cr component, bits [15:8] as Cb component and bits
+    [31:16] must be zero.
+
+``V4L2_CID_AUTOBRIGHTNESS`` ``(boolean)``
+    Enable Automatic Brightness.
+
+``V4L2_CID_ROTATE`` ``(integer)``
+    Rotates the image by specified angle. Common angles are 90, 270 and
+    180. Rotating the image to 90 and 270 will reverse the height and
+    width of the display window. It is necessary to set the new height
+    and width of the picture using the
+    :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl according to the
+    rotation angle selected.
+
+``V4L2_CID_BG_COLOR`` ``(integer)``
+    Sets the background color on the current output device. Background
+    color needs to be specified in the RGB24 format. The supplied 32 bit
+    value is interpreted as bits 0-7 Red color information, bits 8-15
+    Green color information, bits 16-23 Blue color information and bits
+    24-31 must be zero.
+
+``V4L2_CID_ILLUMINATORS_1 V4L2_CID_ILLUMINATORS_2`` ``(boolean)``
+    Switch on or off the illuminator 1 or 2 of the device (usually a
+    microscope).
+
+``V4L2_CID_MIN_BUFFERS_FOR_CAPTURE`` ``(integer)``
+    This is a read-only control that can be read by the application and
+    used as a hint to determine the number of CAPTURE buffers to pass to
+    REQBUFS. The value is the minimum number of CAPTURE buffers that is
+    necessary for hardware to work.
+
+``V4L2_CID_MIN_BUFFERS_FOR_OUTPUT`` ``(integer)``
+    This is a read-only control that can be read by the application and
+    used as a hint to determine the number of OUTPUT buffers to pass to
+    REQBUFS. The value is the minimum number of OUTPUT buffers that is
+    necessary for hardware to work.
+
+.. _v4l2-alpha-component:
+
+``V4L2_CID_ALPHA_COMPONENT`` ``(integer)``
+    Sets the alpha color component. When a capture device (or capture
+    queue of a mem-to-mem device) produces a frame format that includes
+    an alpha component (e.g.
+    :ref:`packed RGB image formats <pixfmt-rgb>`) and the alpha value
+    is not defined by the device or the mem-to-mem input data this
+    control lets you select the alpha component value of all pixels.
+    When an output device (or output queue of a mem-to-mem device)
+    consumes a frame format that doesn't include an alpha component and
+    the device supports alpha channel processing this control lets you
+    set the alpha component value of all pixels for further processing
+    in the device.
+
+``V4L2_CID_LASTP1``
+    End of the predefined control IDs (currently
+    ``V4L2_CID_ALPHA_COMPONENT`` + 1).
+
+``V4L2_CID_PRIVATE_BASE``
+    ID of the first custom (driver specific) control. Applications
+    depending on particular custom controls should check the driver name
+    and version, see :ref:`querycap`.
+
+Applications can enumerate the available controls with the
+:ref:`VIDIOC_QUERYCTRL` and
+:ref:`VIDIOC_QUERYMENU <VIDIOC_QUERYCTRL>` ioctls, get and set a
+control value with the :ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and
+:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls. Drivers must implement
+``VIDIOC_QUERYCTRL``, ``VIDIOC_G_CTRL`` and ``VIDIOC_S_CTRL`` when the
+device has one or more controls, ``VIDIOC_QUERYMENU`` when it has one or
+more menu type controls.
+
+
+.. _enum_all_controls:
+
+Example: Enumerating all controls
+=================================
+
+.. code-block:: c
+
+    struct v4l2_queryctrl queryctrl;
+    struct v4l2_querymenu querymenu;
+
+    static void enumerate_menu(__u32 id)
+    {
+	printf("  Menu items:\\n");
+
+	memset(&querymenu, 0, sizeof(querymenu));
+	querymenu.id = id;
+
+	for (querymenu.index = queryctrl.minimum;
+	     querymenu.index <= queryctrl.maximum;
+	     querymenu.index++) {
+	    if (0 == ioctl(fd, VIDIOC_QUERYMENU, &querymenu)) {
+		printf("  %s\\n", querymenu.name);
+	    }
+	}
+    }
+
+    memset(&queryctrl, 0, sizeof(queryctrl));
+
+    queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
+    while (0 == ioctl(fd, VIDIOC_QUERYCTRL, &queryctrl)) {
+	if (!(queryctrl.flags & V4L2_CTRL_FLAG_DISABLED)) {
+	    printf("Control %s\\n", queryctrl.name);
+
+	    if (queryctrl.type == V4L2_CTRL_TYPE_MENU)
+	        enumerate_menu(queryctrl.id);
+        }
+
+	queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+    }
+    if (errno != EINVAL) {
+	perror("VIDIOC_QUERYCTRL");
+	exit(EXIT_FAILURE);
+    }
+
+Example: Enumerating all controls including compound controls
+=============================================================
+
+.. code-block:: c
+
+    struct v4l2_query_ext_ctrl query_ext_ctrl;
+
+    memset(&query_ext_ctrl, 0, sizeof(query_ext_ctrl));
+
+    query_ext_ctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
+    while (0 == ioctl(fd, VIDIOC_QUERY_EXT_CTRL, &query_ext_ctrl)) {
+	if (!(query_ext_ctrl.flags & V4L2_CTRL_FLAG_DISABLED)) {
+	    printf("Control %s\\n", query_ext_ctrl.name);
+
+	    if (query_ext_ctrl.type == V4L2_CTRL_TYPE_MENU)
+	        enumerate_menu(query_ext_ctrl.id);
+        }
+
+	query_ext_ctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
+    }
+    if (errno != EINVAL) {
+	perror("VIDIOC_QUERY_EXT_CTRL");
+	exit(EXIT_FAILURE);
+    }
+
+Example: Enumerating all user controls (old style)
+==================================================
+
+.. code-block:: c
+
+
+    memset(&queryctrl, 0, sizeof(queryctrl));
+
+    for (queryctrl.id = V4L2_CID_BASE;
+	 queryctrl.id < V4L2_CID_LASTP1;
+	 queryctrl.id++) {
+	if (0 == ioctl(fd, VIDIOC_QUERYCTRL, &queryctrl)) {
+	    if (queryctrl.flags & V4L2_CTRL_FLAG_DISABLED)
+		continue;
+
+	    printf("Control %s\\n", queryctrl.name);
+
+	    if (queryctrl.type == V4L2_CTRL_TYPE_MENU)
+		enumerate_menu(queryctrl.id);
+	} else {
+	    if (errno == EINVAL)
+		continue;
+
+	    perror("VIDIOC_QUERYCTRL");
+	    exit(EXIT_FAILURE);
+	}
+    }
+
+    for (queryctrl.id = V4L2_CID_PRIVATE_BASE;;
+	 queryctrl.id++) {
+	if (0 == ioctl(fd, VIDIOC_QUERYCTRL, &queryctrl)) {
+	    if (queryctrl.flags & V4L2_CTRL_FLAG_DISABLED)
+		continue;
+
+	    printf("Control %s\\n", queryctrl.name);
+
+	    if (queryctrl.type == V4L2_CTRL_TYPE_MENU)
+		enumerate_menu(queryctrl.id);
+	} else {
+	    if (errno == EINVAL)
+		break;
+
+	    perror("VIDIOC_QUERYCTRL");
+	    exit(EXIT_FAILURE);
+	}
+    }
+
+
+Example: Changing controls
+==========================
+
+.. code-block:: c
+
+    struct v4l2_queryctrl queryctrl;
+    struct v4l2_control control;
+
+    memset(&queryctrl, 0, sizeof(queryctrl));
+    queryctrl.id = V4L2_CID_BRIGHTNESS;
+
+    if (-1 == ioctl(fd, VIDIOC_QUERYCTRL, &queryctrl)) {
+	if (errno != EINVAL) {
+	    perror("VIDIOC_QUERYCTRL");
+	    exit(EXIT_FAILURE);
+	} else {
+	    printf("V4L2_CID_BRIGHTNESS is not supportedn");
+	}
+    } else if (queryctrl.flags & V4L2_CTRL_FLAG_DISABLED) {
+	printf("V4L2_CID_BRIGHTNESS is not supportedn");
+    } else {
+	memset(&control, 0, sizeof (control));
+	control.id = V4L2_CID_BRIGHTNESS;
+	control.value = queryctrl.default_value;
+
+	if (-1 == ioctl(fd, VIDIOC_S_CTRL, &control)) {
+	    perror("VIDIOC_S_CTRL");
+	    exit(EXIT_FAILURE);
+	}
+    }
+
+    memset(&control, 0, sizeof(control));
+    control.id = V4L2_CID_CONTRAST;
+
+    if (0 == ioctl(fd, VIDIOC_G_CTRL, &control)) {
+	control.value += 1;
+
+	/* The driver may clamp the value or return ERANGE, ignored here */
+
+	if (-1 == ioctl(fd, VIDIOC_S_CTRL, &control)
+	    && errno != ERANGE) {
+	    perror("VIDIOC_S_CTRL");
+	    exit(EXIT_FAILURE);
+	}
+    /* Ignore if V4L2_CID_CONTRAST is unsupported */
+    } else if (errno != EINVAL) {
+	perror("VIDIOC_G_CTRL");
+	exit(EXIT_FAILURE);
+    }
+
+    control.id = V4L2_CID_AUDIO_MUTE;
+    control.value = 1; /* silence */
+
+    /* Errors ignored */
+    ioctl(fd, VIDIOC_S_CTRL, &control);
+
+.. [#f1]
+   The use of ``V4L2_CID_PRIVATE_BASE`` is problematic because different
+   drivers may use the same ``V4L2_CID_PRIVATE_BASE`` ID for different
+   controls. This makes it hard to programmatically set such controls
+   since the meaning of the control with that ID is driver dependent. In
+   order to resolve this drivers use unique IDs and the
+   ``V4L2_CID_PRIVATE_BASE`` IDs are mapped to those unique IDs by the
+   kernel. Consider these ``V4L2_CID_PRIVATE_BASE`` IDs as aliases to
+   the real IDs.
+
+   Many applications today still use the ``V4L2_CID_PRIVATE_BASE`` IDs
+   instead of using :ref:`VIDIOC_QUERYCTRL` with
+   the ``V4L2_CTRL_FLAG_NEXT_CTRL`` flag to enumerate all IDs, so
+   support for ``V4L2_CID_PRIVATE_BASE`` is still around.
diff --git a/Documentation/userspace-api/media/v4l/crop.rst b/Documentation/userspace-api/media/v4l/crop.rst
new file mode 100644
index 000000000..3fe185e25
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/crop.rst
@@ -0,0 +1,317 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _crop:
+
+*****************************************************
+Image Cropping, Insertion and Scaling -- the CROP API
+*****************************************************
+
+.. note::
+
+   The CROP API is mostly superseded by the newer :ref:`SELECTION API
+   <selection-api>`. The new API should be preferred in most cases,
+   with the exception of pixel aspect ratio detection, which is
+   implemented by :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>` and has no
+   equivalent in the SELECTION API. See :ref:`selection-vs-crop` for a
+   comparison of the two APIs.
+
+Some video capture devices can sample a subsection of the picture and
+shrink or enlarge it to an image of arbitrary size. We call these
+abilities cropping and scaling. Some video output devices can scale an
+image up or down and insert it at an arbitrary scan line and horizontal
+offset into a video signal.
+
+Applications can use the following API to select an area in the video
+signal, query the default area and the hardware limits.
+
+.. note::
+
+   Despite their name, the :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>`,
+   :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and :ref:`VIDIOC_S_CROP
+   <VIDIOC_G_CROP>` ioctls apply to input as well as output devices.
+
+Scaling requires a source and a target. On a video capture or overlay
+device the source is the video signal, and the cropping ioctls determine
+the area actually sampled. The target are images read by the application
+or overlaid onto the graphics screen. Their size (and position for an
+overlay) is negotiated with the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`
+and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctls.
+
+On a video output device the source are the images passed in by the
+application, and their size is again negotiated with the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+ioctls, or may be encoded in a compressed video stream. The target is
+the video signal, and the cropping ioctls determine the area where the
+images are inserted.
+
+Source and target rectangles are defined even if the device does not
+support scaling or the :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and
+:ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` ioctls. Their size (and position
+where applicable) will be fixed in this case.
+
+.. note::
+
+   All capture and output devices that support the CROP or SELECTION
+   API will also support the :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>`
+   ioctl.
+
+Cropping Structures
+===================
+
+
+.. _crop-scale:
+
+.. kernel-figure:: crop.svg
+    :alt:    crop.svg
+    :align:  center
+
+    Image Cropping, Insertion and Scaling
+
+    The cropping, insertion and scaling process
+
+
+
+For capture devices the coordinates of the top left corner, width and
+height of the area which can be sampled is given by the ``bounds``
+substructure of the struct :c:type:`v4l2_cropcap` returned
+by the :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>` ioctl. To support a wide
+range of hardware this specification does not define an origin or units.
+However by convention drivers should horizontally count unscaled samples
+relative to 0H (the leading edge of the horizontal sync pulse, see
+:ref:`vbi-hsync`). Vertically ITU-R line numbers of the first field
+(see ITU R-525 line numbering for :ref:`525 lines <vbi-525>` and for
+:ref:`625 lines <vbi-625>`), multiplied by two if the driver
+can capture both fields.
+
+The top left corner, width and height of the source rectangle, that is
+the area actually sampled, is given by struct
+:c:type:`v4l2_crop` using the same coordinate system as
+struct :c:type:`v4l2_cropcap`. Applications can use the
+:ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and :ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>`
+ioctls to get and set this rectangle. It must lie completely within the
+capture boundaries and the driver may further adjust the requested size
+and/or position according to hardware limitations.
+
+Each capture device has a default source rectangle, given by the
+``defrect`` substructure of struct
+:c:type:`v4l2_cropcap`. The center of this rectangle
+shall align with the center of the active picture area of the video
+signal, and cover what the driver writer considers the complete picture.
+Drivers shall reset the source rectangle to the default when the driver
+is first loaded, but not later.
+
+For output devices these structures and ioctls are used accordingly,
+defining the *target* rectangle where the images will be inserted into
+the video signal.
+
+
+Scaling Adjustments
+===================
+
+Video hardware can have various cropping, insertion and scaling
+limitations. It may only scale up or down, support only discrete scaling
+factors, or have different scaling abilities in horizontal and vertical
+direction. Also it may not support scaling at all. At the same time the
+struct :c:type:`v4l2_crop` rectangle may have to be aligned,
+and both the source and target rectangles may have arbitrary upper and
+lower size limits. In particular the maximum ``width`` and ``height`` in
+struct :c:type:`v4l2_crop` may be smaller than the struct
+:c:type:`v4l2_cropcap`. ``bounds`` area. Therefore, as
+usual, drivers are expected to adjust the requested parameters and
+return the actual values selected.
+
+Applications can change the source or the target rectangle first, as
+they may prefer a particular image size or a certain area in the video
+signal. If the driver has to adjust both to satisfy hardware
+limitations, the last requested rectangle shall take priority, and the
+driver should preferably adjust the opposite one. The
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl however shall not change
+the driver state and therefore only adjust the requested rectangle.
+
+Suppose scaling on a video capture device is restricted to a factor 1:1
+or 2:1 in either direction and the target image size must be a multiple
+of 16 × 16 pixels. The source cropping rectangle is set to defaults,
+which are also the upper limit in this example, of 640 × 400 pixels at
+offset 0, 0. An application requests an image size of 300 × 225 pixels,
+assuming video will be scaled down from the "full picture" accordingly.
+The driver sets the image size to the closest possible values 304 × 224,
+then chooses the cropping rectangle closest to the requested size, that
+is 608 × 224 (224 × 2:1 would exceed the limit 400). The offset 0, 0 is
+still valid, thus unmodified. Given the default cropping rectangle
+reported by :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>` the application can
+easily propose another offset to center the cropping rectangle.
+
+Now the application may insist on covering an area using a picture
+aspect ratio closer to the original request, so it asks for a cropping
+rectangle of 608 × 456 pixels. The present scaling factors limit
+cropping to 640 × 384, so the driver returns the cropping size 608 × 384
+and adjusts the image size to closest possible 304 × 192.
+
+
+Examples
+========
+
+Source and target rectangles shall remain unchanged across closing and
+reopening a device, such that piping data into or out of a device will
+work without special preparations. More advanced applications should
+ensure the parameters are suitable before starting I/O.
+
+.. note::
+
+   On the next two examples, a video capture device is assumed;
+   change ``V4L2_BUF_TYPE_VIDEO_CAPTURE`` for other types of device.
+
+Example: Resetting the cropping parameters
+==========================================
+
+.. code-block:: c
+
+    struct v4l2_cropcap cropcap;
+    struct v4l2_crop crop;
+
+    memset (&cropcap, 0, sizeof (cropcap));
+    cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+    if (-1 == ioctl (fd, VIDIOC_CROPCAP, &cropcap)) {
+	perror ("VIDIOC_CROPCAP");
+	exit (EXIT_FAILURE);
+    }
+
+    memset (&crop, 0, sizeof (crop));
+    crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    crop.c = cropcap.defrect;
+
+    /* Ignore if cropping is not supported (EINVAL). */
+
+    if (-1 == ioctl (fd, VIDIOC_S_CROP, &crop)
+	&& errno != EINVAL) {
+	perror ("VIDIOC_S_CROP");
+	exit (EXIT_FAILURE);
+    }
+
+
+Example: Simple downscaling
+===========================
+
+.. code-block:: c
+
+    struct v4l2_cropcap cropcap;
+    struct v4l2_format format;
+
+    reset_cropping_parameters ();
+
+    /* Scale down to 1/4 size of full picture. */
+
+    memset (&format, 0, sizeof (format)); /* defaults */
+
+    format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+    format.fmt.pix.width = cropcap.defrect.width >> 1;
+    format.fmt.pix.height = cropcap.defrect.height >> 1;
+    format.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+
+    if (-1 == ioctl (fd, VIDIOC_S_FMT, &format)) {
+	perror ("VIDIOC_S_FORMAT");
+	exit (EXIT_FAILURE);
+    }
+
+    /* We could check the actual image size now, the actual scaling factor
+       or if the driver can scale at all. */
+
+Example: Selecting an output area
+=================================
+
+.. note:: This example assumes an output device.
+
+.. code-block:: c
+
+    struct v4l2_cropcap cropcap;
+    struct v4l2_crop crop;
+
+    memset (&cropcap, 0, sizeof (cropcap));
+    cropcap.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+
+    if (-1 == ioctl (fd, VIDIOC_CROPCAP;, &cropcap)) {
+	perror ("VIDIOC_CROPCAP");
+	exit (EXIT_FAILURE);
+    }
+
+    memset (&crop, 0, sizeof (crop));
+
+    crop.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+    crop.c = cropcap.defrect;
+
+    /* Scale the width and height to 50 % of their original size
+       and center the output. */
+
+    crop.c.width /= 2;
+    crop.c.height /= 2;
+    crop.c.left += crop.c.width / 2;
+    crop.c.top += crop.c.height / 2;
+
+    /* Ignore if cropping is not supported (EINVAL). */
+
+    if (-1 == ioctl (fd, VIDIOC_S_CROP, &crop)
+	&& errno != EINVAL) {
+	perror ("VIDIOC_S_CROP");
+	exit (EXIT_FAILURE);
+    }
+
+Example: Current scaling factor and pixel aspect
+================================================
+
+.. note:: This example assumes a video capture device.
+
+.. code-block:: c
+
+    struct v4l2_cropcap cropcap;
+    struct v4l2_crop crop;
+    struct v4l2_format format;
+    double hscale, vscale;
+    double aspect;
+    int dwidth, dheight;
+
+    memset (&cropcap, 0, sizeof (cropcap));
+    cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+    if (-1 == ioctl (fd, VIDIOC_CROPCAP, &cropcap)) {
+	perror ("VIDIOC_CROPCAP");
+	exit (EXIT_FAILURE);
+    }
+
+    memset (&crop, 0, sizeof (crop));
+    crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+    if (-1 == ioctl (fd, VIDIOC_G_CROP, &crop)) {
+	if (errno != EINVAL) {
+	    perror ("VIDIOC_G_CROP");
+	    exit (EXIT_FAILURE);
+	}
+
+	/* Cropping not supported. */
+	crop.c = cropcap.defrect;
+    }
+
+    memset (&format, 0, sizeof (format));
+    format.fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+    if (-1 == ioctl (fd, VIDIOC_G_FMT, &format)) {
+	perror ("VIDIOC_G_FMT");
+	exit (EXIT_FAILURE);
+    }
+
+    /* The scaling applied by the driver. */
+
+    hscale = format.fmt.pix.width / (double) crop.c.width;
+    vscale = format.fmt.pix.height / (double) crop.c.height;
+
+    aspect = cropcap.pixelaspect.numerator /
+	 (double) cropcap.pixelaspect.denominator;
+    aspect = aspect * hscale / vscale;
+
+    /* Devices following ITU-R BT.601 do not capture
+       square pixels. For playback on a computer monitor
+       we should scale the images to this size. */
+
+    dwidth = format.fmt.pix.width / aspect;
+    dheight = format.fmt.pix.height;
diff --git a/Documentation/userspace-api/media/v4l/crop.svg b/Documentation/userspace-api/media/v4l/crop.svg
new file mode 100644
index 000000000..548322775
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/crop.svg
@@ -0,0 +1,281 @@
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diff --git a/Documentation/userspace-api/media/v4l/depth-formats.rst b/Documentation/userspace-api/media/v4l/depth-formats.rst
new file mode 100644
index 000000000..b4f3fc229
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/depth-formats.rst
@@ -0,0 +1,17 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _depth-formats:
+
+*************
+Depth Formats
+*************
+
+Depth data provides distance to points, mapped onto the image plane
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-inzi
+    pixfmt-z16
+    pixfmt-cnf4
diff --git a/Documentation/userspace-api/media/v4l/dev-capture.rst b/Documentation/userspace-api/media/v4l/dev-capture.rst
new file mode 100644
index 000000000..fe58fd450
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-capture.rst
@@ -0,0 +1,101 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _capture:
+
+***********************
+Video Capture Interface
+***********************
+
+Video capture devices sample an analog video signal and store the
+digitized images in memory. Today nearly all devices can capture at full
+25 or 30 frames/second. With this interface applications can control the
+capture process and move images from the driver into user space.
+
+Conventionally V4L2 video capture devices are accessed through character
+device special files named ``/dev/video`` and ``/dev/video0`` to
+``/dev/video63`` with major number 81 and minor numbers 0 to 63.
+``/dev/video`` is typically a symbolic link to the preferred video
+device.
+
+.. note:: The same device file names are used for video output devices.
+
+Querying Capabilities
+=====================
+
+Devices supporting the video capture interface set the
+``V4L2_CAP_VIDEO_CAPTURE`` or ``V4L2_CAP_VIDEO_CAPTURE_MPLANE`` flag in
+the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. As secondary device
+functions they may also support the :ref:`video overlay <overlay>`
+(``V4L2_CAP_VIDEO_OVERLAY``) and the :ref:`raw VBI capture <raw-vbi>`
+(``V4L2_CAP_VBI_CAPTURE``) interface. At least one of the read/write or
+streaming I/O methods must be supported. Tuners and audio inputs are
+optional.
+
+Supplemental Functions
+======================
+
+Video capture devices shall support :ref:`audio input <audio>`,
+:ref:`tuner`, :ref:`controls <control>`,
+:ref:`cropping and scaling <crop>` and
+:ref:`streaming parameter <streaming-par>` ioctls as needed. The
+:ref:`video input <video>` ioctls must be supported by all video
+capture devices.
+
+Image Format Negotiation
+========================
+
+The result of a capture operation is determined by cropping and image
+format parameters. The former select an area of the video picture to
+capture, the latter how images are stored in memory, i. e. in RGB or YUV
+format, the number of bits per pixel or width and height. Together they
+also define how images are scaled in the process.
+
+As usual these parameters are *not* reset at :c:func:`open()`
+time to permit Unix tool chains, programming a device and then reading
+from it as if it was a plain file. Well written V4L2 applications ensure
+they really get what they want, including cropping and scaling.
+
+Cropping initialization at minimum requires to reset the parameters to
+defaults. An example is given in :ref:`crop`.
+
+To query the current image format applications set the ``type`` field of
+a struct :c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_VIDEO_CAPTURE`` or
+``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` and call the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl with a pointer to this
+structure. Drivers fill the struct
+:c:type:`v4l2_pix_format` ``pix`` or the struct
+:c:type:`v4l2_pix_format_mplane` ``pix_mp``
+member of the ``fmt`` union.
+
+To request different parameters applications set the ``type`` field of a
+struct :c:type:`v4l2_format` as above and initialize all
+fields of the struct :c:type:`v4l2_pix_format`
+``vbi`` member of the ``fmt`` union, or better just modify the results
+of :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, and call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+ioctl with a pointer to this structure. Drivers may adjust the
+parameters and finally return the actual parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`
+does.
+
+Like :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` the :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl
+can be used to learn about hardware limitations without disabling I/O or
+possibly time consuming hardware preparations.
+
+The contents of struct :c:type:`v4l2_pix_format` and
+struct :c:type:`v4l2_pix_format_mplane` are
+discussed in :ref:`pixfmt`. See also the specification of the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctls for
+details. Video capture devices must implement both the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`
+and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, even if :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ignores all
+requests and always returns default parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does.
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` is optional.
+
+Reading Images
+==============
+
+A video capture device may support the :ref:`read() function <func-read>`
+and/or streaming (:ref:`memory mapping <func-mmap>` or
+:ref:`user pointer <userp>`) I/O. See :ref:`io` for details.
diff --git a/Documentation/userspace-api/media/v4l/dev-decoder.rst b/Documentation/userspace-api/media/v4l/dev-decoder.rst
new file mode 100644
index 000000000..3d4138a4b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-decoder.rst
@@ -0,0 +1,1103 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. _decoder:
+
+*************************************************
+Memory-to-Memory Stateful Video Decoder Interface
+*************************************************
+
+A stateful video decoder takes complete chunks of the bytestream (e.g. Annex-B
+H.264/HEVC stream, raw VP8/9 stream) and decodes them into raw video frames in
+display order. The decoder is expected not to require any additional information
+from the client to process these buffers.
+
+Performing software parsing, processing etc. of the stream in the driver in
+order to support this interface is strongly discouraged. In case such
+operations are needed, use of the Stateless Video Decoder Interface (in
+development) is strongly advised.
+
+Conventions and Notations Used in This Document
+===============================================
+
+1. The general V4L2 API rules apply if not specified in this document
+   otherwise.
+
+2. The meaning of words "must", "may", "should", etc. is as per `RFC
+   2119 <https://tools.ietf.org/html/rfc2119>`_.
+
+3. All steps not marked "optional" are required.
+
+4. :c:func:`VIDIOC_G_EXT_CTRLS` and :c:func:`VIDIOC_S_EXT_CTRLS` may be used
+   interchangeably with :c:func:`VIDIOC_G_CTRL` and :c:func:`VIDIOC_S_CTRL`,
+   unless specified otherwise.
+
+5. Single-planar API (see :ref:`planar-apis`) and applicable structures may be
+   used interchangeably with multi-planar API, unless specified otherwise,
+   depending on decoder capabilities and following the general V4L2 guidelines.
+
+6. i = [a..b]: sequence of integers from a to b, inclusive, i.e. i =
+   [0..2]: i = 0, 1, 2.
+
+7. Given an ``OUTPUT`` buffer A, then A’ represents a buffer on the ``CAPTURE``
+   queue containing data that resulted from processing buffer A.
+
+.. _decoder-glossary:
+
+Glossary
+========
+
+CAPTURE
+   the destination buffer queue; for decoders, the queue of buffers containing
+   decoded frames; for encoders, the queue of buffers containing an encoded
+   bytestream; ``V4L2_BUF_TYPE_VIDEO_CAPTURE`` or
+   ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``; data is captured from the hardware
+   into ``CAPTURE`` buffers.
+
+client
+   the application communicating with the decoder or encoder implementing
+   this interface.
+
+coded format
+   encoded/compressed video bytestream format (e.g. H.264, VP8, etc.); see
+   also: raw format.
+
+coded height
+   height for given coded resolution.
+
+coded resolution
+   stream resolution in pixels aligned to codec and hardware requirements;
+   typically visible resolution rounded up to full macroblocks;
+   see also: visible resolution.
+
+coded width
+   width for given coded resolution.
+
+decode order
+   the order in which frames are decoded; may differ from display order if the
+   coded format includes a feature of frame reordering; for decoders,
+   ``OUTPUT`` buffers must be queued by the client in decode order; for
+   encoders ``CAPTURE`` buffers must be returned by the encoder in decode order.
+
+destination
+   data resulting from the decode process; see ``CAPTURE``.
+
+display order
+   the order in which frames must be displayed; for encoders, ``OUTPUT``
+   buffers must be queued by the client in display order; for decoders,
+   ``CAPTURE`` buffers must be returned by the decoder in display order.
+
+DPB
+   Decoded Picture Buffer; an H.264/HEVC term for a buffer that stores a decoded
+   raw frame available for reference in further decoding steps.
+
+EOS
+   end of stream.
+
+IDR
+   Instantaneous Decoder Refresh; a type of a keyframe in an H.264/HEVC-encoded
+   stream, which clears the list of earlier reference frames (DPBs).
+
+keyframe
+   an encoded frame that does not reference frames decoded earlier, i.e.
+   can be decoded fully on its own.
+
+macroblock
+   a processing unit in image and video compression formats based on linear
+   block transforms (e.g. H.264, VP8, VP9); codec-specific, but for most of
+   popular codecs the size is 16x16 samples (pixels).
+
+OUTPUT
+   the source buffer queue; for decoders, the queue of buffers containing
+   an encoded bytestream; for encoders, the queue of buffers containing raw
+   frames; ``V4L2_BUF_TYPE_VIDEO_OUTPUT`` or
+   ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``; the hardware is fed with data
+   from ``OUTPUT`` buffers.
+
+PPS
+   Picture Parameter Set; a type of metadata entity in an H.264/HEVC bytestream.
+
+raw format
+   uncompressed format containing raw pixel data (e.g. YUV, RGB formats).
+
+resume point
+   a point in the bytestream from which decoding may start/continue, without
+   any previous state/data present, e.g.: a keyframe (VP8/VP9) or
+   SPS/PPS/IDR sequence (H.264/HEVC); a resume point is required to start decode
+   of a new stream, or to resume decoding after a seek.
+
+source
+   data fed to the decoder or encoder; see ``OUTPUT``.
+
+source height
+   height in pixels for given source resolution; relevant to encoders only.
+
+source resolution
+   resolution in pixels of source frames being source to the encoder and
+   subject to further cropping to the bounds of visible resolution; relevant to
+   encoders only.
+
+source width
+   width in pixels for given source resolution; relevant to encoders only.
+
+SPS
+   Sequence Parameter Set; a type of metadata entity in an H.264/HEVC bytestream.
+
+stream metadata
+   additional (non-visual) information contained inside encoded bytestream;
+   for example: coded resolution, visible resolution, codec profile.
+
+visible height
+   height for given visible resolution; display height.
+
+visible resolution
+   stream resolution of the visible picture, in pixels, to be used for
+   display purposes; must be smaller or equal to coded resolution;
+   display resolution.
+
+visible width
+   width for given visible resolution; display width.
+
+State Machine
+=============
+
+.. kernel-render:: DOT
+   :alt: DOT digraph of decoder state machine
+   :caption: Decoder State Machine
+
+   digraph decoder_state_machine {
+       node [shape = doublecircle, label="Decoding"] Decoding;
+
+       node [shape = circle, label="Initialization"] Initialization;
+       node [shape = circle, label="Capture\nsetup"] CaptureSetup;
+       node [shape = circle, label="Dynamic\nResolution\nChange"] ResChange;
+       node [shape = circle, label="Stopped"] Stopped;
+       node [shape = circle, label="Drain"] Drain;
+       node [shape = circle, label="Seek"] Seek;
+       node [shape = circle, label="End of Stream"] EoS;
+
+       node [shape = point]; qi
+       qi -> Initialization [ label = "open()" ];
+
+       Initialization -> CaptureSetup [ label = "CAPTURE\nformat\nestablished" ];
+
+       CaptureSetup -> Stopped [ label = "CAPTURE\nbuffers\nready" ];
+
+       Decoding -> ResChange [ label = "Stream\nresolution\nchange" ];
+       Decoding -> Drain [ label = "V4L2_DEC_CMD_STOP" ];
+       Decoding -> EoS [ label = "EoS mark\nin the stream" ];
+       Decoding -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
+       Decoding -> Stopped [ label = "VIDIOC_STREAMOFF(CAPTURE)" ];
+       Decoding -> Decoding;
+
+       ResChange -> CaptureSetup [ label = "CAPTURE\nformat\nestablished" ];
+       ResChange -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
+
+       EoS -> Drain [ label = "Implicit\ndrain" ];
+
+       Drain -> Stopped [ label = "All CAPTURE\nbuffers dequeued\nor\nVIDIOC_STREAMOFF(CAPTURE)" ];
+       Drain -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
+
+       Seek -> Decoding [ label = "VIDIOC_STREAMON(OUTPUT)" ];
+       Seek -> Initialization [ label = "VIDIOC_REQBUFS(OUTPUT, 0)" ];
+
+       Stopped -> Decoding [ label = "V4L2_DEC_CMD_START\nor\nVIDIOC_STREAMON(CAPTURE)" ];
+       Stopped -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
+   }
+
+Querying Capabilities
+=====================
+
+1. To enumerate the set of coded formats supported by the decoder, the
+   client may call :c:func:`VIDIOC_ENUM_FMT` on ``OUTPUT``.
+
+   * The full set of supported formats will be returned, regardless of the
+     format set on ``CAPTURE``.
+   * Check the flags field of :c:type:`v4l2_fmtdesc` for more information
+     about the decoder's capabilities with respect to each coded format.
+     In particular whether or not the decoder has a full-fledged bytestream
+     parser and if the decoder supports dynamic resolution changes.
+
+2. To enumerate the set of supported raw formats, the client may call
+   :c:func:`VIDIOC_ENUM_FMT` on ``CAPTURE``.
+
+   * Only the formats supported for the format currently active on ``OUTPUT``
+     will be returned.
+
+   * In order to enumerate raw formats supported by a given coded format,
+     the client must first set that coded format on ``OUTPUT`` and then
+     enumerate formats on ``CAPTURE``.
+
+3. The client may use :c:func:`VIDIOC_ENUM_FRAMESIZES` to detect supported
+   resolutions for a given format, passing desired pixel format in
+   :c:type:`v4l2_frmsizeenum` ``pixel_format``.
+
+   * Values returned by :c:func:`VIDIOC_ENUM_FRAMESIZES` for a coded pixel
+     format will include all possible coded resolutions supported by the
+     decoder for given coded pixel format.
+
+   * Values returned by :c:func:`VIDIOC_ENUM_FRAMESIZES` for a raw pixel format
+     will include all possible frame buffer resolutions supported by the
+     decoder for given raw pixel format and the coded format currently set on
+     ``OUTPUT``.
+
+4. Supported profiles and levels for the coded format currently set on
+   ``OUTPUT``, if applicable, may be queried using their respective controls
+   via :c:func:`VIDIOC_QUERYCTRL`.
+
+Initialization
+==============
+
+1. Set the coded format on ``OUTPUT`` via :c:func:`VIDIOC_S_FMT`.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+     ``pixelformat``
+         a coded pixel format.
+
+     ``width``, ``height``
+         coded resolution of the stream; required only if it cannot be parsed
+         from the stream for the given coded format; otherwise the decoder will
+         use this resolution as a placeholder resolution that will likely change
+         as soon as it can parse the actual coded resolution from the stream.
+
+     ``sizeimage``
+         desired size of ``OUTPUT`` buffers; the decoder may adjust it to
+         match hardware requirements.
+
+     other fields
+         follow standard semantics.
+
+   * **Return fields:**
+
+     ``sizeimage``
+         adjusted size of ``OUTPUT`` buffers.
+
+   * The ``CAPTURE`` format will be updated with an appropriate frame buffer
+     resolution instantly based on the width and height returned by
+     :c:func:`VIDIOC_S_FMT`.
+     However, for coded formats that include stream resolution information,
+     after the decoder is done parsing the information from the stream, it will
+     update the ``CAPTURE`` format with new values and signal a source change
+     event, regardless of whether they match the values set by the client or
+     not.
+
+   .. important::
+
+      Changing the ``OUTPUT`` format may change the currently set ``CAPTURE``
+      format. How the new ``CAPTURE`` format is determined is up to the decoder
+      and the client must ensure it matches its needs afterwards.
+
+2.  Allocate source (bytestream) buffers via :c:func:`VIDIOC_REQBUFS` on
+    ``OUTPUT``.
+
+    * **Required fields:**
+
+      ``count``
+          requested number of buffers to allocate; greater than zero.
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+      ``memory``
+          follows standard semantics.
+
+    * **Return fields:**
+
+      ``count``
+          the actual number of buffers allocated.
+
+    .. warning::
+
+       The actual number of allocated buffers may differ from the ``count``
+       given. The client must check the updated value of ``count`` after the
+       call returns.
+
+    Alternatively, :c:func:`VIDIOC_CREATE_BUFS` on the ``OUTPUT`` queue can be
+    used to have more control over buffer allocation.
+
+    * **Required fields:**
+
+      ``count``
+          requested number of buffers to allocate; greater than zero.
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+      ``memory``
+          follows standard semantics.
+
+      ``format``
+          follows standard semantics.
+
+    * **Return fields:**
+
+      ``count``
+          adjusted to the number of allocated buffers.
+
+    .. warning::
+
+       The actual number of allocated buffers may differ from the ``count``
+       given. The client must check the updated value of ``count`` after the
+       call returns.
+
+3.  Start streaming on the ``OUTPUT`` queue via :c:func:`VIDIOC_STREAMON`.
+
+4.  **This step only applies to coded formats that contain resolution information
+    in the stream.** Continue queuing/dequeuing bytestream buffers to/from the
+    ``OUTPUT`` queue via :c:func:`VIDIOC_QBUF` and :c:func:`VIDIOC_DQBUF`. The
+    buffers will be processed and returned to the client in order, until
+    required metadata to configure the ``CAPTURE`` queue are found. This is
+    indicated by the decoder sending a ``V4L2_EVENT_SOURCE_CHANGE`` event with
+    ``changes`` set to ``V4L2_EVENT_SRC_CH_RESOLUTION``.
+
+    * It is not an error if the first buffer does not contain enough data for
+      this to occur. Processing of the buffers will continue as long as more
+      data is needed.
+
+    * If data in a buffer that triggers the event is required to decode the
+      first frame, it will not be returned to the client, until the
+      initialization sequence completes and the frame is decoded.
+
+    * If the client has not set the coded resolution of the stream on its own,
+      calling :c:func:`VIDIOC_G_FMT`, :c:func:`VIDIOC_S_FMT`,
+      :c:func:`VIDIOC_TRY_FMT` or :c:func:`VIDIOC_REQBUFS` on the ``CAPTURE``
+      queue will not return the real values for the stream until a
+      ``V4L2_EVENT_SOURCE_CHANGE`` event with ``changes`` set to
+      ``V4L2_EVENT_SRC_CH_RESOLUTION`` is signaled.
+
+    .. important::
+
+       Any client query issued after the decoder queues the event will return
+       values applying to the just parsed stream, including queue formats,
+       selection rectangles and controls.
+
+    .. note::
+
+       A client capable of acquiring stream parameters from the bytestream on
+       its own may attempt to set the width and height of the ``OUTPUT`` format
+       to non-zero values matching the coded size of the stream, skip this step
+       and continue with the `Capture Setup` sequence. However, it must not
+       rely on any driver queries regarding stream parameters, such as
+       selection rectangles and controls, since the decoder has not parsed them
+       from the stream yet. If the values configured by the client do not match
+       those parsed by the decoder, a `Dynamic Resolution Change` will be
+       triggered to reconfigure them.
+
+    .. note::
+
+       No decoded frames are produced during this phase.
+
+5.  Continue with the `Capture Setup` sequence.
+
+Capture Setup
+=============
+
+1.  Call :c:func:`VIDIOC_G_FMT` on the ``CAPTURE`` queue to get format for the
+    destination buffers parsed/decoded from the bytestream.
+
+    * **Required fields:**
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+    * **Return fields:**
+
+      ``width``, ``height``
+          frame buffer resolution for the decoded frames.
+
+      ``pixelformat``
+          pixel format for decoded frames.
+
+      ``num_planes`` (for _MPLANE ``type`` only)
+          number of planes for pixelformat.
+
+      ``sizeimage``, ``bytesperline``
+          as per standard semantics; matching frame buffer format.
+
+    .. note::
+
+       The value of ``pixelformat`` may be any pixel format supported by the
+       decoder for the current stream. The decoder should choose a
+       preferred/optimal format for the default configuration. For example, a
+       YUV format may be preferred over an RGB format if an additional
+       conversion step would be required for the latter.
+
+2.  **Optional.** Acquire the visible resolution via
+    :c:func:`VIDIOC_G_SELECTION`.
+
+    * **Required fields:**
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+      ``target``
+          set to ``V4L2_SEL_TGT_COMPOSE``.
+
+    * **Return fields:**
+
+      ``r.left``, ``r.top``, ``r.width``, ``r.height``
+          the visible rectangle; it must fit within the frame buffer resolution
+          returned by :c:func:`VIDIOC_G_FMT` on ``CAPTURE``.
+
+    * The following selection targets are supported on ``CAPTURE``:
+
+      ``V4L2_SEL_TGT_CROP_BOUNDS``
+          corresponds to the coded resolution of the stream.
+
+      ``V4L2_SEL_TGT_CROP_DEFAULT``
+          the rectangle covering the part of the ``CAPTURE`` buffer that
+          contains meaningful picture data (visible area); width and height
+          will be equal to the visible resolution of the stream.
+
+      ``V4L2_SEL_TGT_CROP``
+          the rectangle within the coded resolution to be output to
+          ``CAPTURE``; defaults to ``V4L2_SEL_TGT_CROP_DEFAULT``; read-only on
+          hardware without additional compose/scaling capabilities.
+
+      ``V4L2_SEL_TGT_COMPOSE_BOUNDS``
+          the maximum rectangle within a ``CAPTURE`` buffer, which the cropped
+          frame can be composed into; equal to ``V4L2_SEL_TGT_CROP`` if the
+          hardware does not support compose/scaling.
+
+      ``V4L2_SEL_TGT_COMPOSE_DEFAULT``
+          equal to ``V4L2_SEL_TGT_CROP``.
+
+      ``V4L2_SEL_TGT_COMPOSE``
+          the rectangle inside a ``CAPTURE`` buffer into which the cropped
+          frame is written; defaults to ``V4L2_SEL_TGT_COMPOSE_DEFAULT``;
+          read-only on hardware without additional compose/scaling capabilities.
+
+      ``V4L2_SEL_TGT_COMPOSE_PADDED``
+          the rectangle inside a ``CAPTURE`` buffer which is overwritten by the
+          hardware; equal to ``V4L2_SEL_TGT_COMPOSE`` if the hardware does not
+          write padding pixels.
+
+    .. warning::
+
+       The values are guaranteed to be meaningful only after the decoder
+       successfully parses the stream metadata. The client must not rely on the
+       query before that happens.
+
+3.  **Optional.** Enumerate ``CAPTURE`` formats via :c:func:`VIDIOC_ENUM_FMT` on
+    the ``CAPTURE`` queue. Once the stream information is parsed and known, the
+    client may use this ioctl to discover which raw formats are supported for
+    given stream and select one of them via :c:func:`VIDIOC_S_FMT`.
+
+    .. important::
+
+       The decoder will return only formats supported for the currently
+       established coded format, as per the ``OUTPUT`` format and/or stream
+       metadata parsed in this initialization sequence, even if more formats
+       may be supported by the decoder in general. In other words, the set
+       returned will be a subset of the initial query mentioned in the
+       `Querying Capabilities` section.
+
+       For example, a decoder may support YUV and RGB formats for resolutions
+       1920x1088 and lower, but only YUV for higher resolutions (due to
+       hardware limitations). After parsing a resolution of 1920x1088 or lower,
+       :c:func:`VIDIOC_ENUM_FMT` may return a set of YUV and RGB pixel formats,
+       but after parsing resolution higher than 1920x1088, the decoder will not
+       return RGB, unsupported for this resolution.
+
+       However, subsequent resolution change event triggered after
+       discovering a resolution change within the same stream may switch
+       the stream into a lower resolution and :c:func:`VIDIOC_ENUM_FMT`
+       would return RGB formats again in that case.
+
+4.  **Optional.** Set the ``CAPTURE`` format via :c:func:`VIDIOC_S_FMT` on the
+    ``CAPTURE`` queue. The client may choose a different format than
+    selected/suggested by the decoder in :c:func:`VIDIOC_G_FMT`.
+
+    * **Required fields:**
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+      ``pixelformat``
+          a raw pixel format.
+
+      ``width``, ``height``
+         frame buffer resolution of the decoded stream; typically unchanged from
+	 what was returned with :c:func:`VIDIOC_G_FMT`, but it may be different
+	 if the hardware supports composition and/or scaling.
+
+   * Setting the ``CAPTURE`` format will reset the compose selection rectangles
+     to their default values, based on the new resolution, as described in the
+     previous step.
+
+5. **Optional.** Set the compose rectangle via :c:func:`VIDIOC_S_SELECTION` on
+   the ``CAPTURE`` queue if it is desired and if the decoder has compose and/or
+   scaling capabilities.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+     ``target``
+         set to ``V4L2_SEL_TGT_COMPOSE``.
+
+     ``r.left``, ``r.top``, ``r.width``, ``r.height``
+         the rectangle inside a ``CAPTURE`` buffer into which the cropped
+         frame is written; defaults to ``V4L2_SEL_TGT_COMPOSE_DEFAULT``;
+         read-only on hardware without additional compose/scaling capabilities.
+
+   * **Return fields:**
+
+     ``r.left``, ``r.top``, ``r.width``, ``r.height``
+         the visible rectangle; it must fit within the frame buffer resolution
+         returned by :c:func:`VIDIOC_G_FMT` on ``CAPTURE``.
+
+   .. warning::
+
+      The decoder may adjust the compose rectangle to the nearest
+      supported one to meet codec and hardware requirements. The client needs
+      to check the adjusted rectangle returned by :c:func:`VIDIOC_S_SELECTION`.
+
+6.  If all the following conditions are met, the client may resume the decoding
+    instantly:
+
+    * ``sizeimage`` of the new format (determined in previous steps) is less
+      than or equal to the size of currently allocated buffers,
+
+    * the number of buffers currently allocated is greater than or equal to the
+      minimum number of buffers acquired in previous steps. To fulfill this
+      requirement, the client may use :c:func:`VIDIOC_CREATE_BUFS` to add new
+      buffers.
+
+    In that case, the remaining steps do not apply and the client may resume
+    the decoding by one of the following actions:
+
+    * if the ``CAPTURE`` queue is streaming, call :c:func:`VIDIOC_DECODER_CMD`
+      with the ``V4L2_DEC_CMD_START`` command,
+
+    * if the ``CAPTURE`` queue is not streaming, call :c:func:`VIDIOC_STREAMON`
+      on the ``CAPTURE`` queue.
+
+    However, if the client intends to change the buffer set, to lower
+    memory usage or for any other reasons, it may be achieved by following
+    the steps below.
+
+7.  **If the** ``CAPTURE`` **queue is streaming,** keep queuing and dequeuing
+    buffers on the ``CAPTURE`` queue until a buffer marked with the
+    ``V4L2_BUF_FLAG_LAST`` flag is dequeued.
+
+8.  **If the** ``CAPTURE`` **queue is streaming,** call :c:func:`VIDIOC_STREAMOFF`
+    on the ``CAPTURE`` queue to stop streaming.
+
+    .. warning::
+
+       The ``OUTPUT`` queue must remain streaming. Calling
+       :c:func:`VIDIOC_STREAMOFF` on it would abort the sequence and trigger a
+       seek.
+
+9.  **If the** ``CAPTURE`` **queue has buffers allocated,** free the ``CAPTURE``
+    buffers using :c:func:`VIDIOC_REQBUFS`.
+
+    * **Required fields:**
+
+      ``count``
+          set to 0.
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+      ``memory``
+          follows standard semantics.
+
+10. Allocate ``CAPTURE`` buffers via :c:func:`VIDIOC_REQBUFS` on the
+    ``CAPTURE`` queue.
+
+    * **Required fields:**
+
+      ``count``
+          requested number of buffers to allocate; greater than zero.
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+      ``memory``
+          follows standard semantics.
+
+    * **Return fields:**
+
+      ``count``
+          actual number of buffers allocated.
+
+    .. warning::
+
+       The actual number of allocated buffers may differ from the ``count``
+       given. The client must check the updated value of ``count`` after the
+       call returns.
+
+    .. note::
+
+       To allocate more than the minimum number of buffers (for pipeline
+       depth), the client may query the ``V4L2_CID_MIN_BUFFERS_FOR_CAPTURE``
+       control to get the minimum number of buffers required, and pass the
+       obtained value plus the number of additional buffers needed in the
+       ``count`` field to :c:func:`VIDIOC_REQBUFS`.
+
+    Alternatively, :c:func:`VIDIOC_CREATE_BUFS` on the ``CAPTURE`` queue can be
+    used to have more control over buffer allocation. For example, by
+    allocating buffers larger than the current ``CAPTURE`` format, future
+    resolution changes can be accommodated.
+
+    * **Required fields:**
+
+      ``count``
+          requested number of buffers to allocate; greater than zero.
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+      ``memory``
+          follows standard semantics.
+
+      ``format``
+          a format representing the maximum framebuffer resolution to be
+          accommodated by newly allocated buffers.
+
+    * **Return fields:**
+
+      ``count``
+          adjusted to the number of allocated buffers.
+
+    .. warning::
+
+        The actual number of allocated buffers may differ from the ``count``
+        given. The client must check the updated value of ``count`` after the
+        call returns.
+
+    .. note::
+
+       To allocate buffers for a format different than parsed from the stream
+       metadata, the client must proceed as follows, before the metadata
+       parsing is initiated:
+
+       * set width and height of the ``OUTPUT`` format to desired coded resolution to
+         let the decoder configure the ``CAPTURE`` format appropriately,
+
+       * query the ``CAPTURE`` format using :c:func:`VIDIOC_G_FMT` and save it
+         until this step.
+
+       The format obtained in the query may be then used with
+       :c:func:`VIDIOC_CREATE_BUFS` in this step to allocate the buffers.
+
+11. Call :c:func:`VIDIOC_STREAMON` on the ``CAPTURE`` queue to start decoding
+    frames.
+
+Decoding
+========
+
+This state is reached after the `Capture Setup` sequence finishes successfully.
+In this state, the client queues and dequeues buffers to both queues via
+:c:func:`VIDIOC_QBUF` and :c:func:`VIDIOC_DQBUF`, following the standard
+semantics.
+
+The content of the source ``OUTPUT`` buffers depends on the active coded pixel
+format and may be affected by codec-specific extended controls, as stated in
+the documentation of each format.
+
+Both queues operate independently, following the standard behavior of V4L2
+buffer queues and memory-to-memory devices. In addition, the order of decoded
+frames dequeued from the ``CAPTURE`` queue may differ from the order of queuing
+coded frames to the ``OUTPUT`` queue, due to properties of the selected coded
+format, e.g. frame reordering.
+
+The client must not assume any direct relationship between ``CAPTURE``
+and ``OUTPUT`` buffers and any specific timing of buffers becoming
+available to dequeue. Specifically:
+
+* a buffer queued to ``OUTPUT`` may result in no buffers being produced
+  on ``CAPTURE`` (e.g. if it does not contain encoded data, or if only
+  metadata syntax structures are present in it),
+
+* a buffer queued to ``OUTPUT`` may result in more than one buffer produced
+  on ``CAPTURE`` (if the encoded data contained more than one frame, or if
+  returning a decoded frame allowed the decoder to return a frame that
+  preceded it in decode, but succeeded it in the display order),
+
+* a buffer queued to ``OUTPUT`` may result in a buffer being produced on
+  ``CAPTURE`` later into decode process, and/or after processing further
+  ``OUTPUT`` buffers, or be returned out of order, e.g. if display
+  reordering is used,
+
+* buffers may become available on the ``CAPTURE`` queue without additional
+  buffers queued to ``OUTPUT`` (e.g. during drain or ``EOS``), because of the
+  ``OUTPUT`` buffers queued in the past whose decoding results are only
+  available at later time, due to specifics of the decoding process.
+
+.. note::
+
+   To allow matching decoded ``CAPTURE`` buffers with ``OUTPUT`` buffers they
+   originated from, the client can set the ``timestamp`` field of the
+   :c:type:`v4l2_buffer` struct when queuing an ``OUTPUT`` buffer. The
+   ``CAPTURE`` buffer(s), which resulted from decoding that ``OUTPUT`` buffer
+   will have their ``timestamp`` field set to the same value when dequeued.
+
+   In addition to the straightforward case of one ``OUTPUT`` buffer producing
+   one ``CAPTURE`` buffer, the following cases are defined:
+
+   * one ``OUTPUT`` buffer generates multiple ``CAPTURE`` buffers: the same
+     ``OUTPUT`` timestamp will be copied to multiple ``CAPTURE`` buffers.
+
+   * multiple ``OUTPUT`` buffers generate one ``CAPTURE`` buffer: timestamp of
+     the ``OUTPUT`` buffer queued first will be copied.
+
+   * the decoding order differs from the display order (i.e. the ``CAPTURE``
+     buffers are out-of-order compared to the ``OUTPUT`` buffers): ``CAPTURE``
+     timestamps will not retain the order of ``OUTPUT`` timestamps.
+
+During the decoding, the decoder may initiate one of the special sequences, as
+listed below. The sequences will result in the decoder returning all the
+``CAPTURE`` buffers that originated from all the ``OUTPUT`` buffers processed
+before the sequence started. Last of the buffers will have the
+``V4L2_BUF_FLAG_LAST`` flag set. To determine the sequence to follow, the client
+must check if there is any pending event and:
+
+* if a ``V4L2_EVENT_SOURCE_CHANGE`` event with ``changes`` set to
+  ``V4L2_EVENT_SRC_CH_RESOLUTION`` is pending, the `Dynamic Resolution
+  Change` sequence needs to be followed,
+
+* if a ``V4L2_EVENT_EOS`` event is pending, the `End of Stream` sequence needs
+  to be followed.
+
+Some of the sequences can be intermixed with each other and need to be handled
+as they happen. The exact operation is documented for each sequence.
+
+Should a decoding error occur, it will be reported to the client with the level
+of details depending on the decoder capabilities. Specifically:
+
+* the CAPTURE buffer that contains the results of the failed decode operation
+  will be returned with the V4L2_BUF_FLAG_ERROR flag set,
+
+* if the decoder is able to precisely report the OUTPUT buffer that triggered
+  the error, such buffer will be returned with the V4L2_BUF_FLAG_ERROR flag
+  set.
+
+In case of a fatal failure that does not allow the decoding to continue, any
+further operations on corresponding decoder file handle will return the -EIO
+error code. The client may close the file handle and open a new one, or
+alternatively reinitialize the instance by stopping streaming on both queues,
+releasing all buffers and performing the Initialization sequence again.
+
+Seek
+====
+
+Seek is controlled by the ``OUTPUT`` queue, as it is the source of coded data.
+The seek does not require any specific operation on the ``CAPTURE`` queue, but
+it may be affected as per normal decoder operation.
+
+1. Stop the ``OUTPUT`` queue to begin the seek sequence via
+   :c:func:`VIDIOC_STREAMOFF`.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+   * The decoder will drop all the pending ``OUTPUT`` buffers and they must be
+     treated as returned to the client (following standard semantics).
+
+2. Restart the ``OUTPUT`` queue via :c:func:`VIDIOC_STREAMON`.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+   * The decoder will start accepting new source bytestream buffers after the
+     call returns.
+
+3. Start queuing buffers containing coded data after the seek to the ``OUTPUT``
+   queue until a suitable resume point is found.
+
+   .. note::
+
+      There is no requirement to begin queuing coded data starting exactly
+      from a resume point (e.g. SPS or a keyframe). Any queued ``OUTPUT``
+      buffers will be processed and returned to the client until a suitable
+      resume point is found.  While looking for a resume point, the decoder
+      should not produce any decoded frames into ``CAPTURE`` buffers.
+
+      Some hardware is known to mishandle seeks to a non-resume point. Such an
+      operation may result in an unspecified number of corrupted decoded frames
+      being made available on the ``CAPTURE`` queue. Drivers must ensure that
+      no fatal decoding errors or crashes occur, and implement any necessary
+      handling and workarounds for hardware issues related to seek operations.
+
+   .. warning::
+
+      In case of the H.264/HEVC codec, the client must take care not to seek
+      over a change of SPS/PPS. Even though the target frame could be a
+      keyframe, the stale SPS/PPS inside decoder state would lead to undefined
+      results when decoding. Although the decoder must handle that case without
+      a crash or a fatal decode error, the client must not expect a sensible
+      decode output.
+
+      If the hardware can detect such corrupted decoded frames, then
+      corresponding buffers will be returned to the client with the
+      V4L2_BUF_FLAG_ERROR set. See the `Decoding` section for further
+      description of decode error reporting.
+
+4. After a resume point is found, the decoder will start returning ``CAPTURE``
+   buffers containing decoded frames.
+
+.. important::
+
+   A seek may result in the `Dynamic Resolution Change` sequence being
+   initiated, due to the seek target having decoding parameters different from
+   the part of the stream decoded before the seek. The sequence must be handled
+   as per normal decoder operation.
+
+.. warning::
+
+   It is not specified when the ``CAPTURE`` queue starts producing buffers
+   containing decoded data from the ``OUTPUT`` buffers queued after the seek,
+   as it operates independently from the ``OUTPUT`` queue.
+
+   The decoder may return a number of remaining ``CAPTURE`` buffers containing
+   decoded frames originating from the ``OUTPUT`` buffers queued before the
+   seek sequence is performed.
+
+   The ``VIDIOC_STREAMOFF`` operation discards any remaining queued
+   ``OUTPUT`` buffers, which means that not all of the ``OUTPUT`` buffers
+   queued before the seek sequence may have matching ``CAPTURE`` buffers
+   produced.  For example, given the sequence of operations on the
+   ``OUTPUT`` queue:
+
+     QBUF(A), QBUF(B), STREAMOFF(), STREAMON(), QBUF(G), QBUF(H),
+
+   any of the following results on the ``CAPTURE`` queue is allowed:
+
+     {A’, B’, G’, H’}, {A’, G’, H’}, {G’, H’}.
+
+   To determine the CAPTURE buffer containing the first decoded frame after the
+   seek, the client may observe the timestamps to match the CAPTURE and OUTPUT
+   buffers or use V4L2_DEC_CMD_STOP and V4L2_DEC_CMD_START to drain the
+   decoder.
+
+.. note::
+
+   To achieve instantaneous seek, the client may restart streaming on the
+   ``CAPTURE`` queue too to discard decoded, but not yet dequeued buffers.
+
+Dynamic Resolution Change
+=========================
+
+Streams that include resolution metadata in the bytestream may require switching
+to a different resolution during the decoding.
+
+.. note::
+
+   Not all decoders can detect resolution changes. Those that do set the
+   ``V4L2_FMT_FLAG_DYN_RESOLUTION`` flag for the coded format when
+   :c:func:`VIDIOC_ENUM_FMT` is called.
+
+The sequence starts when the decoder detects a coded frame with one or more of
+the following parameters different from those previously established (and
+reflected by corresponding queries):
+
+* coded resolution (``OUTPUT`` width and height),
+
+* visible resolution (selection rectangles),
+
+* the minimum number of buffers needed for decoding,
+
+* bit-depth of the bitstream has been changed.
+
+Whenever that happens, the decoder must proceed as follows:
+
+1.  After encountering a resolution change in the stream, the decoder sends a
+    ``V4L2_EVENT_SOURCE_CHANGE`` event with ``changes`` set to
+    ``V4L2_EVENT_SRC_CH_RESOLUTION``.
+
+    .. important::
+
+       Any client query issued after the decoder queues the event will return
+       values applying to the stream after the resolution change, including
+       queue formats, selection rectangles and controls.
+
+2.  The decoder will then process and decode all remaining buffers from before
+    the resolution change point.
+
+    * The last buffer from before the change must be marked with the
+      ``V4L2_BUF_FLAG_LAST`` flag, similarly to the `Drain` sequence above.
+
+    .. warning::
+
+       The last buffer may be empty (with :c:type:`v4l2_buffer` ``bytesused``
+       = 0) and in that case it must be ignored by the client, as it does not
+       contain a decoded frame.
+
+    .. note::
+
+       Any attempt to dequeue more ``CAPTURE`` buffers beyond the buffer marked
+       with ``V4L2_BUF_FLAG_LAST`` will result in a -EPIPE error from
+       :c:func:`VIDIOC_DQBUF`.
+
+The client must continue the sequence as described below to continue the
+decoding process.
+
+1.  Dequeue the source change event.
+
+    .. important::
+
+       A source change triggers an implicit decoder drain, similar to the
+       explicit `Drain` sequence. The decoder is stopped after it completes.
+       The decoding process must be resumed with either a pair of calls to
+       :c:func:`VIDIOC_STREAMOFF` and :c:func:`VIDIOC_STREAMON` on the
+       ``CAPTURE`` queue, or a call to :c:func:`VIDIOC_DECODER_CMD` with the
+       ``V4L2_DEC_CMD_START`` command.
+
+2.  Continue with the `Capture Setup` sequence.
+
+.. note::
+
+   During the resolution change sequence, the ``OUTPUT`` queue must remain
+   streaming. Calling :c:func:`VIDIOC_STREAMOFF` on the ``OUTPUT`` queue would
+   abort the sequence and initiate a seek.
+
+   In principle, the ``OUTPUT`` queue operates separately from the ``CAPTURE``
+   queue and this remains true for the duration of the entire resolution change
+   sequence as well.
+
+   The client should, for best performance and simplicity, keep queuing/dequeuing
+   buffers to/from the ``OUTPUT`` queue even while processing this sequence.
+
+Drain
+=====
+
+To ensure that all queued ``OUTPUT`` buffers have been processed and related
+``CAPTURE`` buffers are given to the client, the client must follow the drain
+sequence described below. After the drain sequence ends, the client has
+received all decoded frames for all ``OUTPUT`` buffers queued before the
+sequence was started.
+
+1. Begin drain by issuing :c:func:`VIDIOC_DECODER_CMD`.
+
+   * **Required fields:**
+
+     ``cmd``
+         set to ``V4L2_DEC_CMD_STOP``.
+
+     ``flags``
+         set to 0.
+
+     ``pts``
+         set to 0.
+
+   .. warning::
+
+      The sequence can be only initiated if both ``OUTPUT`` and ``CAPTURE``
+      queues are streaming. For compatibility reasons, the call to
+      :c:func:`VIDIOC_DECODER_CMD` will not fail even if any of the queues is
+      not streaming, but at the same time it will not initiate the `Drain`
+      sequence and so the steps described below would not be applicable.
+
+2. Any ``OUTPUT`` buffers queued by the client before the
+   :c:func:`VIDIOC_DECODER_CMD` was issued will be processed and decoded as
+   normal. The client must continue to handle both queues independently,
+   similarly to normal decode operation. This includes:
+
+   * handling any operations triggered as a result of processing those buffers,
+     such as the `Dynamic Resolution Change` sequence, before continuing with
+     the drain sequence,
+
+   * queuing and dequeuing ``CAPTURE`` buffers, until a buffer marked with the
+     ``V4L2_BUF_FLAG_LAST`` flag is dequeued,
+
+     .. warning::
+
+        The last buffer may be empty (with :c:type:`v4l2_buffer`
+        ``bytesused`` = 0) and in that case it must be ignored by the client,
+        as it does not contain a decoded frame.
+
+     .. note::
+
+        Any attempt to dequeue more ``CAPTURE`` buffers beyond the buffer
+        marked with ``V4L2_BUF_FLAG_LAST`` will result in a -EPIPE error from
+        :c:func:`VIDIOC_DQBUF`.
+
+   * dequeuing processed ``OUTPUT`` buffers, until all the buffers queued
+     before the ``V4L2_DEC_CMD_STOP`` command are dequeued,
+
+   * dequeuing the ``V4L2_EVENT_EOS`` event, if the client subscribed to it.
+
+   .. note::
+
+      For backwards compatibility, the decoder will signal a ``V4L2_EVENT_EOS``
+      event when the last frame has been decoded and all frames are ready to be
+      dequeued. It is a deprecated behavior and the client must not rely on it.
+      The ``V4L2_BUF_FLAG_LAST`` buffer flag should be used instead.
+
+3. Once all the ``OUTPUT`` buffers queued before the ``V4L2_DEC_CMD_STOP`` call
+   are dequeued and the last ``CAPTURE`` buffer is dequeued, the decoder is
+   stopped and it will accept, but not process, any newly queued ``OUTPUT``
+   buffers until the client issues any of the following operations:
+
+   * ``V4L2_DEC_CMD_START`` - the decoder will not be reset and will resume
+     operation normally, with all the state from before the drain,
+
+   * a pair of :c:func:`VIDIOC_STREAMOFF` and :c:func:`VIDIOC_STREAMON` on the
+     ``CAPTURE`` queue - the decoder will resume the operation normally,
+     however any ``CAPTURE`` buffers still in the queue will be returned to the
+     client,
+
+   * a pair of :c:func:`VIDIOC_STREAMOFF` and :c:func:`VIDIOC_STREAMON` on the
+     ``OUTPUT`` queue - any pending source buffers will be returned to the
+     client and the `Seek` sequence will be triggered.
+
+.. note::
+
+   Once the drain sequence is initiated, the client needs to drive it to
+   completion, as described by the steps above, unless it aborts the process by
+   issuing :c:func:`VIDIOC_STREAMOFF` on any of the ``OUTPUT`` or ``CAPTURE``
+   queues.  The client is not allowed to issue ``V4L2_DEC_CMD_START`` or
+   ``V4L2_DEC_CMD_STOP`` again while the drain sequence is in progress and they
+   will fail with -EBUSY error code if attempted.
+
+   Although not mandatory, the availability of decoder commands may be queried
+   using :c:func:`VIDIOC_TRY_DECODER_CMD`.
+
+End of Stream
+=============
+
+If the decoder encounters an end of stream marking in the stream, the decoder
+will initiate the `Drain` sequence, which the client must handle as described
+above, skipping the initial :c:func:`VIDIOC_DECODER_CMD`.
+
+Commit Points
+=============
+
+Setting formats and allocating buffers trigger changes in the behavior of the
+decoder.
+
+1. Setting the format on the ``OUTPUT`` queue may change the set of formats
+   supported/advertised on the ``CAPTURE`` queue. In particular, it also means
+   that the ``CAPTURE`` format may be reset and the client must not rely on the
+   previously set format being preserved.
+
+2. Enumerating formats on the ``CAPTURE`` queue always returns only formats
+   supported for the current ``OUTPUT`` format.
+
+3. Setting the format on the ``CAPTURE`` queue does not change the list of
+   formats available on the ``OUTPUT`` queue. An attempt to set a ``CAPTURE``
+   format that is not supported for the currently selected ``OUTPUT`` format
+   will result in the decoder adjusting the requested ``CAPTURE`` format to a
+   supported one.
+
+4. Enumerating formats on the ``OUTPUT`` queue always returns the full set of
+   supported coded formats, irrespectively of the current ``CAPTURE`` format.
+
+5. While buffers are allocated on any of the ``OUTPUT`` or ``CAPTURE`` queues,
+   the client must not change the format on the ``OUTPUT`` queue. Drivers will
+   return the -EBUSY error code for any such format change attempt.
+
+To summarize, setting formats and allocation must always start with the
+``OUTPUT`` queue and the ``OUTPUT`` queue is the master that governs the
+set of supported formats for the ``CAPTURE`` queue.
diff --git a/Documentation/userspace-api/media/v4l/dev-encoder.rst b/Documentation/userspace-api/media/v4l/dev-encoder.rst
new file mode 100644
index 000000000..aa338b962
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-encoder.rst
@@ -0,0 +1,729 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+
+.. _encoder:
+
+*************************************************
+Memory-to-Memory Stateful Video Encoder Interface
+*************************************************
+
+A stateful video encoder takes raw video frames in display order and encodes
+them into a bytestream. It generates complete chunks of the bytestream, including
+all metadata, headers, etc. The resulting bytestream does not require any
+further post-processing by the client.
+
+Performing software stream processing, header generation etc. in the driver
+in order to support this interface is strongly discouraged. In case such
+operations are needed, use of the Stateless Video Encoder Interface (in
+development) is strongly advised.
+
+Conventions and Notations Used in This Document
+===============================================
+
+1. The general V4L2 API rules apply if not specified in this document
+   otherwise.
+
+2. The meaning of words "must", "may", "should", etc. is as per `RFC
+   2119 <https://tools.ietf.org/html/rfc2119>`_.
+
+3. All steps not marked "optional" are required.
+
+4. :c:func:`VIDIOC_G_EXT_CTRLS` and :c:func:`VIDIOC_S_EXT_CTRLS` may be used
+   interchangeably with :c:func:`VIDIOC_G_CTRL` and :c:func:`VIDIOC_S_CTRL`,
+   unless specified otherwise.
+
+5. Single-planar API (see :ref:`planar-apis`) and applicable structures may be
+   used interchangeably with multi-planar API, unless specified otherwise,
+   depending on encoder capabilities and following the general V4L2 guidelines.
+
+6. i = [a..b]: sequence of integers from a to b, inclusive, i.e. i =
+   [0..2]: i = 0, 1, 2.
+
+7. Given an ``OUTPUT`` buffer A, then A' represents a buffer on the ``CAPTURE``
+   queue containing data that resulted from processing buffer A.
+
+Glossary
+========
+
+Refer to :ref:`decoder-glossary`.
+
+State Machine
+=============
+
+.. kernel-render:: DOT
+   :alt: DOT digraph of encoder state machine
+   :caption: Encoder State Machine
+
+   digraph encoder_state_machine {
+       node [shape = doublecircle, label="Encoding"] Encoding;
+
+       node [shape = circle, label="Initialization"] Initialization;
+       node [shape = circle, label="Stopped"] Stopped;
+       node [shape = circle, label="Drain"] Drain;
+       node [shape = circle, label="Reset"] Reset;
+
+       node [shape = point]; qi
+       qi -> Initialization [ label = "open()" ];
+
+       Initialization -> Encoding [ label = "Both queues streaming" ];
+
+       Encoding -> Drain [ label = "V4L2_ENC_CMD_STOP" ];
+       Encoding -> Reset [ label = "VIDIOC_STREAMOFF(CAPTURE)" ];
+       Encoding -> Stopped [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
+       Encoding -> Encoding;
+
+       Drain -> Stopped [ label = "All CAPTURE\nbuffers dequeued\nor\nVIDIOC_STREAMOFF(OUTPUT)" ];
+       Drain -> Reset [ label = "VIDIOC_STREAMOFF(CAPTURE)" ];
+
+       Reset -> Encoding [ label = "VIDIOC_STREAMON(CAPTURE)" ];
+       Reset -> Initialization [ label = "VIDIOC_REQBUFS(OUTPUT, 0)" ];
+
+       Stopped -> Encoding [ label = "V4L2_ENC_CMD_START\nor\nVIDIOC_STREAMON(OUTPUT)" ];
+       Stopped -> Reset [ label = "VIDIOC_STREAMOFF(CAPTURE)" ];
+   }
+
+Querying Capabilities
+=====================
+
+1. To enumerate the set of coded formats supported by the encoder, the
+   client may call :c:func:`VIDIOC_ENUM_FMT` on ``CAPTURE``.
+
+   * The full set of supported formats will be returned, regardless of the
+     format set on ``OUTPUT``.
+
+2. To enumerate the set of supported raw formats, the client may call
+   :c:func:`VIDIOC_ENUM_FMT` on ``OUTPUT``.
+
+   * Only the formats supported for the format currently active on ``CAPTURE``
+     will be returned.
+
+   * In order to enumerate raw formats supported by a given coded format,
+     the client must first set that coded format on ``CAPTURE`` and then
+     enumerate the formats on ``OUTPUT``.
+
+3. The client may use :c:func:`VIDIOC_ENUM_FRAMESIZES` to detect supported
+   resolutions for a given format, passing the desired pixel format in
+   :c:type:`v4l2_frmsizeenum` ``pixel_format``.
+
+   * Values returned by :c:func:`VIDIOC_ENUM_FRAMESIZES` for a coded pixel
+     format will include all possible coded resolutions supported by the
+     encoder for the given coded pixel format.
+
+   * Values returned by :c:func:`VIDIOC_ENUM_FRAMESIZES` for a raw pixel format
+     will include all possible frame buffer resolutions supported by the
+     encoder for the given raw pixel format and coded format currently set on
+     ``CAPTURE``.
+
+4. The client may use :c:func:`VIDIOC_ENUM_FRAMEINTERVALS` to detect supported
+   frame intervals for a given format and resolution, passing the desired pixel
+   format in :c:type:`v4l2_frmsizeenum` ``pixel_format`` and the resolution
+   in :c:type:`v4l2_frmsizeenum` ``width`` and :c:type:`v4l2_frmsizeenum`
+   ``height``.
+
+   * Values returned by :c:func:`VIDIOC_ENUM_FRAMEINTERVALS` for a coded pixel
+     format and coded resolution will include all possible frame intervals
+     supported by the encoder for the given coded pixel format and resolution.
+
+   * Values returned by :c:func:`VIDIOC_ENUM_FRAMEINTERVALS` for a raw pixel
+     format and resolution will include all possible frame intervals supported
+     by the encoder for the given raw pixel format and resolution and for the
+     coded format, coded resolution and coded frame interval currently set on
+     ``CAPTURE``.
+
+   * Support for :c:func:`VIDIOC_ENUM_FRAMEINTERVALS` is optional. If it is
+     not implemented, then there are no special restrictions other than the
+     limits of the codec itself.
+
+5. Supported profiles and levels for the coded format currently set on
+   ``CAPTURE``, if applicable, may be queried using their respective controls
+   via :c:func:`VIDIOC_QUERYCTRL`.
+
+6. Any additional encoder capabilities may be discovered by querying
+   their respective controls.
+
+Initialization
+==============
+
+1. Set the coded format on the ``CAPTURE`` queue via :c:func:`VIDIOC_S_FMT`.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+     ``pixelformat``
+         the coded format to be produced.
+
+     ``sizeimage``
+         desired size of ``CAPTURE`` buffers; the encoder may adjust it to
+         match hardware requirements.
+
+     ``width``, ``height``
+         ignored (read-only).
+
+     other fields
+         follow standard semantics.
+
+   * **Return fields:**
+
+     ``sizeimage``
+         adjusted size of ``CAPTURE`` buffers.
+
+     ``width``, ``height``
+         the coded size selected by the encoder based on current state, e.g.
+         ``OUTPUT`` format, selection rectangles, etc. (read-only).
+
+   .. important::
+
+      Changing the ``CAPTURE`` format may change the currently set ``OUTPUT``
+      format. How the new ``OUTPUT`` format is determined is up to the encoder
+      and the client must ensure it matches its needs afterwards.
+
+2. **Optional.** Enumerate supported ``OUTPUT`` formats (raw formats for
+   source) for the selected coded format via :c:func:`VIDIOC_ENUM_FMT`.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+     other fields
+         follow standard semantics.
+
+   * **Return fields:**
+
+     ``pixelformat``
+         raw format supported for the coded format currently selected on
+         the ``CAPTURE`` queue.
+
+     other fields
+         follow standard semantics.
+
+3. Set the raw source format on the ``OUTPUT`` queue via
+   :c:func:`VIDIOC_S_FMT`.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+     ``pixelformat``
+         raw format of the source.
+
+     ``width``, ``height``
+         source resolution.
+
+     other fields
+         follow standard semantics.
+
+   * **Return fields:**
+
+     ``width``, ``height``
+         may be adjusted to match encoder minimums, maximums and alignment
+         requirements, as required by the currently selected formats, as
+         reported by :c:func:`VIDIOC_ENUM_FRAMESIZES`.
+
+     other fields
+         follow standard semantics.
+
+   * Setting the ``OUTPUT`` format will reset the selection rectangles to their
+     default values, based on the new resolution, as described in the next
+     step.
+
+4. Set the raw frame interval on the ``OUTPUT`` queue via
+   :c:func:`VIDIOC_S_PARM`. This also sets the coded frame interval on the
+   ``CAPTURE`` queue to the same value.
+
+   * ** Required fields:**
+
+     ``type``
+	 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+     ``parm.output``
+	 set all fields except ``parm.output.timeperframe`` to 0.
+
+     ``parm.output.timeperframe``
+	 the desired frame interval; the encoder may adjust it to
+	 match hardware requirements.
+
+   * **Return fields:**
+
+     ``parm.output.timeperframe``
+	 the adjusted frame interval.
+
+   .. important::
+
+      Changing the ``OUTPUT`` frame interval *also* sets the framerate that
+      the encoder uses to encode the video. So setting the frame interval
+      to 1/24 (or 24 frames per second) will produce a coded video stream
+      that can be played back at that speed. The frame interval for the
+      ``OUTPUT`` queue is just a hint, the application may provide raw
+      frames at a different rate. It can be used by the driver to help
+      schedule multiple encoders running in parallel.
+
+      In the next step the ``CAPTURE`` frame interval can optionally be
+      changed to a different value. This is useful for off-line encoding
+      were the coded frame interval can be different from the rate at
+      which raw frames are supplied.
+
+   .. important::
+
+      ``timeperframe`` deals with *frames*, not fields. So for interlaced
+      formats this is the time per two fields, since a frame consists of
+      a top and a bottom field.
+
+   .. note::
+
+      It is due to historical reasons that changing the ``OUTPUT`` frame
+      interval also changes the coded frame interval on the ``CAPTURE``
+      queue. Ideally these would be independent settings, but that would
+      break the existing API.
+
+5. **Optional** Set the coded frame interval on the ``CAPTURE`` queue via
+   :c:func:`VIDIOC_S_PARM`. This is only necessary if the coded frame
+   interval is different from the raw frame interval, which is typically
+   the case for off-line encoding. Support for this feature is signalled
+   by the :ref:`V4L2_FMT_FLAG_ENC_CAP_FRAME_INTERVAL <fmtdesc-flags>` format flag.
+
+   * ** Required fields:**
+
+     ``type``
+	 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+     ``parm.capture``
+	 set all fields except ``parm.capture.timeperframe`` to 0.
+
+     ``parm.capture.timeperframe``
+	 the desired coded frame interval; the encoder may adjust it to
+	 match hardware requirements.
+
+   * **Return fields:**
+
+     ``parm.capture.timeperframe``
+	 the adjusted frame interval.
+
+   .. important::
+
+      Changing the ``CAPTURE`` frame interval sets the framerate for the
+      coded video. It does *not* set the rate at which buffers arrive on the
+      ``CAPTURE`` queue, that depends on how fast the encoder is and how
+      fast raw frames are queued on the ``OUTPUT`` queue.
+
+   .. important::
+
+      ``timeperframe`` deals with *frames*, not fields. So for interlaced
+      formats this is the time per two fields, since a frame consists of
+      a top and a bottom field.
+
+   .. note::
+
+      Not all drivers support this functionality, in that case just set
+      the desired coded frame interval for the ``OUTPUT`` queue.
+
+      However, drivers that can schedule multiple encoders based on the
+      ``OUTPUT`` frame interval must support this optional feature.
+
+6. **Optional.** Set the visible resolution for the stream metadata via
+   :c:func:`VIDIOC_S_SELECTION` on the ``OUTPUT`` queue if it is desired
+   to be different than the full OUTPUT resolution.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+     ``target``
+         set to ``V4L2_SEL_TGT_CROP``.
+
+     ``r.left``, ``r.top``, ``r.width``, ``r.height``
+         visible rectangle; this must fit within the `V4L2_SEL_TGT_CROP_BOUNDS`
+         rectangle and may be subject to adjustment to match codec and
+         hardware constraints.
+
+   * **Return fields:**
+
+     ``r.left``, ``r.top``, ``r.width``, ``r.height``
+         visible rectangle adjusted by the encoder.
+
+   * The following selection targets are supported on ``OUTPUT``:
+
+     ``V4L2_SEL_TGT_CROP_BOUNDS``
+         equal to the full source frame, matching the active ``OUTPUT``
+         format.
+
+     ``V4L2_SEL_TGT_CROP_DEFAULT``
+         equal to ``V4L2_SEL_TGT_CROP_BOUNDS``.
+
+     ``V4L2_SEL_TGT_CROP``
+         rectangle within the source buffer to be encoded into the
+         ``CAPTURE`` stream; defaults to ``V4L2_SEL_TGT_CROP_DEFAULT``.
+
+         .. note::
+
+            A common use case for this selection target is encoding a source
+            video with a resolution that is not a multiple of a macroblock,
+            e.g.  the common 1920x1080 resolution may require the source
+            buffers to be aligned to 1920x1088 for codecs with 16x16 macroblock
+            size. To avoid encoding the padding, the client needs to explicitly
+            configure this selection target to 1920x1080.
+
+   .. warning::
+
+      The encoder may adjust the crop/compose rectangles to the nearest
+      supported ones to meet codec and hardware requirements. The client needs
+      to check the adjusted rectangle returned by :c:func:`VIDIOC_S_SELECTION`.
+
+7. Allocate buffers for both ``OUTPUT`` and ``CAPTURE`` via
+   :c:func:`VIDIOC_REQBUFS`. This may be performed in any order.
+
+   * **Required fields:**
+
+     ``count``
+         requested number of buffers to allocate; greater than zero.
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT`` or
+         ``CAPTURE``.
+
+     other fields
+         follow standard semantics.
+
+   * **Return fields:**
+
+     ``count``
+          actual number of buffers allocated.
+
+   .. warning::
+
+      The actual number of allocated buffers may differ from the ``count``
+      given. The client must check the updated value of ``count`` after the
+      call returns.
+
+   .. note::
+
+      To allocate more than the minimum number of OUTPUT buffers (for pipeline
+      depth), the client may query the ``V4L2_CID_MIN_BUFFERS_FOR_OUTPUT``
+      control to get the minimum number of buffers required, and pass the
+      obtained value plus the number of additional buffers needed in the
+      ``count`` field to :c:func:`VIDIOC_REQBUFS`.
+
+   Alternatively, :c:func:`VIDIOC_CREATE_BUFS` can be used to have more
+   control over buffer allocation.
+
+   * **Required fields:**
+
+     ``count``
+         requested number of buffers to allocate; greater than zero.
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+     other fields
+         follow standard semantics.
+
+   * **Return fields:**
+
+     ``count``
+         adjusted to the number of allocated buffers.
+
+8. Begin streaming on both ``OUTPUT`` and ``CAPTURE`` queues via
+   :c:func:`VIDIOC_STREAMON`. This may be performed in any order. The actual
+   encoding process starts when both queues start streaming.
+
+.. note::
+
+   If the client stops the ``CAPTURE`` queue during the encode process and then
+   restarts it again, the encoder will begin generating a stream independent
+   from the stream generated before the stop. The exact constraints depend
+   on the coded format, but may include the following implications:
+
+   * encoded frames produced after the restart must not reference any
+     frames produced before the stop, e.g. no long term references for
+     H.264/HEVC,
+
+   * any headers that must be included in a standalone stream must be
+     produced again, e.g. SPS and PPS for H.264/HEVC.
+
+Encoding
+========
+
+This state is reached after the `Initialization` sequence finishes
+successfully.  In this state, the client queues and dequeues buffers to both
+queues via :c:func:`VIDIOC_QBUF` and :c:func:`VIDIOC_DQBUF`, following the
+standard semantics.
+
+The content of encoded ``CAPTURE`` buffers depends on the active coded pixel
+format and may be affected by codec-specific extended controls, as stated
+in the documentation of each format.
+
+Both queues operate independently, following standard behavior of V4L2 buffer
+queues and memory-to-memory devices. In addition, the order of encoded frames
+dequeued from the ``CAPTURE`` queue may differ from the order of queuing raw
+frames to the ``OUTPUT`` queue, due to properties of the selected coded format,
+e.g. frame reordering.
+
+The client must not assume any direct relationship between ``CAPTURE`` and
+``OUTPUT`` buffers and any specific timing of buffers becoming
+available to dequeue. Specifically:
+
+* a buffer queued to ``OUTPUT`` may result in more than one buffer produced on
+  ``CAPTURE`` (for example, if returning an encoded frame allowed the encoder
+  to return a frame that preceded it in display, but succeeded it in the decode
+  order; however, there may be other reasons for this as well),
+
+* a buffer queued to ``OUTPUT`` may result in a buffer being produced on
+  ``CAPTURE`` later into encode process, and/or after processing further
+  ``OUTPUT`` buffers, or be returned out of order, e.g. if display
+  reordering is used,
+
+* buffers may become available on the ``CAPTURE`` queue without additional
+  buffers queued to ``OUTPUT`` (e.g. during drain or ``EOS``), because of the
+  ``OUTPUT`` buffers queued in the past whose encoding results are only
+  available at later time, due to specifics of the encoding process,
+
+* buffers queued to ``OUTPUT`` may not become available to dequeue instantly
+  after being encoded into a corresponding ``CAPTURE`` buffer, e.g. if the
+  encoder needs to use the frame as a reference for encoding further frames.
+
+.. note::
+
+   To allow matching encoded ``CAPTURE`` buffers with ``OUTPUT`` buffers they
+   originated from, the client can set the ``timestamp`` field of the
+   :c:type:`v4l2_buffer` struct when queuing an ``OUTPUT`` buffer. The
+   ``CAPTURE`` buffer(s), which resulted from encoding that ``OUTPUT`` buffer
+   will have their ``timestamp`` field set to the same value when dequeued.
+
+   In addition to the straightforward case of one ``OUTPUT`` buffer producing
+   one ``CAPTURE`` buffer, the following cases are defined:
+
+   * one ``OUTPUT`` buffer generates multiple ``CAPTURE`` buffers: the same
+     ``OUTPUT`` timestamp will be copied to multiple ``CAPTURE`` buffers,
+
+   * the encoding order differs from the presentation order (i.e. the
+     ``CAPTURE`` buffers are out-of-order compared to the ``OUTPUT`` buffers):
+     ``CAPTURE`` timestamps will not retain the order of ``OUTPUT`` timestamps.
+
+.. note::
+
+   To let the client distinguish between frame types (keyframes, intermediate
+   frames; the exact list of types depends on the coded format), the
+   ``CAPTURE`` buffers will have corresponding flag bits set in their
+   :c:type:`v4l2_buffer` struct when dequeued. See the documentation of
+   :c:type:`v4l2_buffer` and each coded pixel format for exact list of flags
+   and their meanings.
+
+Should an encoding error occur, it will be reported to the client with the level
+of details depending on the encoder capabilities. Specifically:
+
+* the ``CAPTURE`` buffer (if any) that contains the results of the failed encode
+  operation will be returned with the ``V4L2_BUF_FLAG_ERROR`` flag set,
+
+* if the encoder is able to precisely report the ``OUTPUT`` buffer(s) that triggered
+  the error, such buffer(s) will be returned with the ``V4L2_BUF_FLAG_ERROR`` flag
+  set.
+
+.. note::
+
+   If a ``CAPTURE`` buffer is too small then it is just returned with the
+   ``V4L2_BUF_FLAG_ERROR`` flag set. More work is needed to detect that this
+   error occurred because the buffer was too small, and to provide support to
+   free existing buffers that were too small.
+
+In case of a fatal failure that does not allow the encoding to continue, any
+further operations on corresponding encoder file handle will return the -EIO
+error code. The client may close the file handle and open a new one, or
+alternatively reinitialize the instance by stopping streaming on both queues,
+releasing all buffers and performing the Initialization sequence again.
+
+Encoding Parameter Changes
+==========================
+
+The client is allowed to use :c:func:`VIDIOC_S_CTRL` to change encoder
+parameters at any time. The availability of parameters is encoder-specific
+and the client must query the encoder to find the set of available controls.
+
+The ability to change each parameter during encoding is encoder-specific, as
+per the standard semantics of the V4L2 control interface. The client may
+attempt to set a control during encoding and if the operation fails with the
+-EBUSY error code, the ``CAPTURE`` queue needs to be stopped for the
+configuration change to be allowed. To do this, it may follow the `Drain`
+sequence to avoid losing the already queued/encoded frames.
+
+The timing of parameter updates is encoder-specific, as per the standard
+semantics of the V4L2 control interface. If the client needs to apply the
+parameters exactly at specific frame, using the Request API
+(:ref:`media-request-api`) should be considered, if supported by the encoder.
+
+Drain
+=====
+
+To ensure that all the queued ``OUTPUT`` buffers have been processed and the
+related ``CAPTURE`` buffers are given to the client, the client must follow the
+drain sequence described below. After the drain sequence ends, the client has
+received all encoded frames for all ``OUTPUT`` buffers queued before the
+sequence was started.
+
+1. Begin the drain sequence by issuing :c:func:`VIDIOC_ENCODER_CMD`.
+
+   * **Required fields:**
+
+     ``cmd``
+         set to ``V4L2_ENC_CMD_STOP``.
+
+     ``flags``
+         set to 0.
+
+     ``pts``
+         set to 0.
+
+   .. warning::
+
+      The sequence can be only initiated if both ``OUTPUT`` and ``CAPTURE``
+      queues are streaming. For compatibility reasons, the call to
+      :c:func:`VIDIOC_ENCODER_CMD` will not fail even if any of the queues is
+      not streaming, but at the same time it will not initiate the `Drain`
+      sequence and so the steps described below would not be applicable.
+
+2. Any ``OUTPUT`` buffers queued by the client before the
+   :c:func:`VIDIOC_ENCODER_CMD` was issued will be processed and encoded as
+   normal. The client must continue to handle both queues independently,
+   similarly to normal encode operation. This includes:
+
+   * queuing and dequeuing ``CAPTURE`` buffers, until a buffer marked with the
+     ``V4L2_BUF_FLAG_LAST`` flag is dequeued,
+
+     .. warning::
+
+        The last buffer may be empty (with :c:type:`v4l2_buffer`
+        ``bytesused`` = 0) and in that case it must be ignored by the client,
+        as it does not contain an encoded frame.
+
+     .. note::
+
+        Any attempt to dequeue more ``CAPTURE`` buffers beyond the buffer
+        marked with ``V4L2_BUF_FLAG_LAST`` will result in a -EPIPE error from
+        :c:func:`VIDIOC_DQBUF`.
+
+   * dequeuing processed ``OUTPUT`` buffers, until all the buffers queued
+     before the ``V4L2_ENC_CMD_STOP`` command are dequeued,
+
+   * dequeuing the ``V4L2_EVENT_EOS`` event, if the client subscribes to it.
+
+   .. note::
+
+      For backwards compatibility, the encoder will signal a ``V4L2_EVENT_EOS``
+      event when the last frame has been encoded and all frames are ready to be
+      dequeued. It is deprecated behavior and the client must not rely on it.
+      The ``V4L2_BUF_FLAG_LAST`` buffer flag should be used instead.
+
+3. Once all ``OUTPUT`` buffers queued before the ``V4L2_ENC_CMD_STOP`` call are
+   dequeued and the last ``CAPTURE`` buffer is dequeued, the encoder is stopped
+   and it will accept, but not process any newly queued ``OUTPUT`` buffers
+   until the client issues any of the following operations:
+
+   * ``V4L2_ENC_CMD_START`` - the encoder will not be reset and will resume
+     operation normally, with all the state from before the drain,
+
+   * a pair of :c:func:`VIDIOC_STREAMOFF` and :c:func:`VIDIOC_STREAMON` on the
+     ``CAPTURE`` queue - the encoder will be reset (see the `Reset` sequence)
+     and then resume encoding,
+
+   * a pair of :c:func:`VIDIOC_STREAMOFF` and :c:func:`VIDIOC_STREAMON` on the
+     ``OUTPUT`` queue - the encoder will resume operation normally, however any
+     source frames queued to the ``OUTPUT`` queue between ``V4L2_ENC_CMD_STOP``
+     and :c:func:`VIDIOC_STREAMOFF` will be discarded.
+
+.. note::
+
+   Once the drain sequence is initiated, the client needs to drive it to
+   completion, as described by the steps above, unless it aborts the process by
+   issuing :c:func:`VIDIOC_STREAMOFF` on any of the ``OUTPUT`` or ``CAPTURE``
+   queues.  The client is not allowed to issue ``V4L2_ENC_CMD_START`` or
+   ``V4L2_ENC_CMD_STOP`` again while the drain sequence is in progress and they
+   will fail with -EBUSY error code if attempted.
+
+   For reference, handling of various corner cases is described below:
+
+   * In case of no buffer in the ``OUTPUT`` queue at the time the
+     ``V4L2_ENC_CMD_STOP`` command was issued, the drain sequence completes
+     immediately and the encoder returns an empty ``CAPTURE`` buffer with the
+     ``V4L2_BUF_FLAG_LAST`` flag set.
+
+   * In case of no buffer in the ``CAPTURE`` queue at the time the drain
+     sequence completes, the next time the client queues a ``CAPTURE`` buffer
+     it is returned at once as an empty buffer with the ``V4L2_BUF_FLAG_LAST``
+     flag set.
+
+   * If :c:func:`VIDIOC_STREAMOFF` is called on the ``CAPTURE`` queue in the
+     middle of the drain sequence, the drain sequence is canceled and all
+     ``CAPTURE`` buffers are implicitly returned to the client.
+
+   * If :c:func:`VIDIOC_STREAMOFF` is called on the ``OUTPUT`` queue in the
+     middle of the drain sequence, the drain sequence completes immediately and
+     next ``CAPTURE`` buffer will be returned empty with the
+     ``V4L2_BUF_FLAG_LAST`` flag set.
+
+   Although not mandatory, the availability of encoder commands may be queried
+   using :c:func:`VIDIOC_TRY_ENCODER_CMD`.
+
+Reset
+=====
+
+The client may want to request the encoder to reinitialize the encoding, so
+that the following stream data becomes independent from the stream data
+generated before. Depending on the coded format, that may imply that:
+
+* encoded frames produced after the restart must not reference any frames
+  produced before the stop, e.g. no long term references for H.264/HEVC,
+
+* any headers that must be included in a standalone stream must be produced
+  again, e.g. SPS and PPS for H.264/HEVC.
+
+This can be achieved by performing the reset sequence.
+
+1. Perform the `Drain` sequence to ensure all the in-flight encoding finishes
+   and respective buffers are dequeued.
+
+2. Stop streaming on the ``CAPTURE`` queue via :c:func:`VIDIOC_STREAMOFF`. This
+   will return all currently queued ``CAPTURE`` buffers to the client, without
+   valid frame data.
+
+3. Start streaming on the ``CAPTURE`` queue via :c:func:`VIDIOC_STREAMON` and
+   continue with regular encoding sequence. The encoded frames produced into
+   ``CAPTURE`` buffers from now on will contain a standalone stream that can be
+   decoded without the need for frames encoded before the reset sequence,
+   starting at the first ``OUTPUT`` buffer queued after issuing the
+   `V4L2_ENC_CMD_STOP` of the `Drain` sequence.
+
+This sequence may be also used to change encoding parameters for encoders
+without the ability to change the parameters on the fly.
+
+Commit Points
+=============
+
+Setting formats and allocating buffers triggers changes in the behavior of the
+encoder.
+
+1. Setting the format on the ``CAPTURE`` queue may change the set of formats
+   supported/advertised on the ``OUTPUT`` queue. In particular, it also means
+   that the ``OUTPUT`` format may be reset and the client must not rely on the
+   previously set format being preserved.
+
+2. Enumerating formats on the ``OUTPUT`` queue always returns only formats
+   supported for the current ``CAPTURE`` format.
+
+3. Setting the format on the ``OUTPUT`` queue does not change the list of
+   formats available on the ``CAPTURE`` queue. An attempt to set the ``OUTPUT``
+   format that is not supported for the currently selected ``CAPTURE`` format
+   will result in the encoder adjusting the requested ``OUTPUT`` format to a
+   supported one.
+
+4. Enumerating formats on the ``CAPTURE`` queue always returns the full set of
+   supported coded formats, irrespective of the current ``OUTPUT`` format.
+
+5. While buffers are allocated on any of the ``OUTPUT`` or ``CAPTURE`` queues,
+   the client must not change the format on the ``CAPTURE`` queue. Drivers will
+   return the -EBUSY error code for any such format change attempt.
+
+To summarize, setting formats and allocation must always start with the
+``CAPTURE`` queue and the ``CAPTURE`` queue is the master that governs the
+set of supported formats for the ``OUTPUT`` queue.
diff --git a/Documentation/userspace-api/media/v4l/dev-event.rst b/Documentation/userspace-api/media/v4l/dev-event.rst
new file mode 100644
index 000000000..f34f9cf6c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-event.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _event:
+
+***************
+Event Interface
+***************
+
+The V4L2 event interface provides a means for a user to get immediately
+notified on certain conditions taking place on a device. This might
+include start of frame or loss of signal events, for example. Changes in
+the value or state of a V4L2 control can also be reported through
+events.
+
+To receive events, the events the user is interested in first must be
+subscribed using the
+:ref:`VIDIOC_SUBSCRIBE_EVENT` ioctl. Once
+an event is subscribed, the events of subscribed types are dequeueable
+using the :ref:`VIDIOC_DQEVENT` ioctl. Events may be
+unsubscribed using VIDIOC_UNSUBSCRIBE_EVENT ioctl. The special event
+type V4L2_EVENT_ALL may be used to unsubscribe all the events the
+driver supports.
+
+The event subscriptions and event queues are specific to file handles.
+Subscribing an event on one file handle does not affect other file
+handles.
+
+The information on dequeueable events is obtained by using select or
+poll system calls on video devices. The V4L2 events use POLLPRI events
+on poll system call and exceptions on select system call.
+
+Starting with kernel 3.1 certain guarantees can be given with regards to
+events:
+
+1. Each subscribed event has its own internal dedicated event queue.
+   This means that flooding of one event type will not interfere with
+   other event types.
+
+2. If the internal event queue for a particular subscribed event becomes
+   full, then the oldest event in that queue will be dropped.
+
+3. Where applicable, certain event types can ensure that the payload of
+   the oldest event that is about to be dropped will be merged with the
+   payload of the next oldest event. Thus ensuring that no information
+   is lost, but only an intermediate step leading up to that
+   information. See the documentation for the event you want to
+   subscribe to whether this is applicable for that event or not.
diff --git a/Documentation/userspace-api/media/v4l/dev-mem2mem.rst b/Documentation/userspace-api/media/v4l/dev-mem2mem.rst
new file mode 100644
index 000000000..d8db46886
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-mem2mem.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _mem2mem:
+
+********************************
+Video Memory-To-Memory Interface
+********************************
+
+A V4L2 memory-to-memory device can compress, decompress, transform, or
+otherwise convert video data from one format into another format, in memory.
+Such memory-to-memory devices set the ``V4L2_CAP_VIDEO_M2M`` or
+``V4L2_CAP_VIDEO_M2M_MPLANE`` capability. Examples of memory-to-memory
+devices are codecs, scalers, deinterlacers or format converters (i.e.
+converting from YUV to RGB).
+
+A memory-to-memory video node acts just like a normal video node, but it
+supports both output (sending frames from memory to the hardware)
+and capture (receiving the processed frames from the hardware into
+memory) stream I/O. An application will have to setup the stream I/O for
+both sides and finally call :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`
+for both capture and output to start the hardware.
+
+Memory-to-memory devices function as a shared resource: you can
+open the video node multiple times, each application setting up their
+own properties that are local to the file handle, and each can use
+it independently from the others. The driver will arbitrate access to
+the hardware and reprogram it whenever another file handler gets access.
+This is different from the usual video node behavior where the video
+properties are global to the device (i.e. changing something through one
+file handle is visible through another file handle).
+
+One of the most common memory-to-memory device is the codec. Codecs
+are more complicated than most and require additional setup for
+their codec parameters. This is done through codec controls.
+See :ref:`mpeg-controls`. More details on how to use codec memory-to-memory
+devices are given in the following sections.
+
+.. toctree::
+    :maxdepth: 1
+
+    dev-decoder
+    dev-encoder
+    dev-stateless-decoder
diff --git a/Documentation/userspace-api/media/v4l/dev-meta.rst b/Documentation/userspace-api/media/v4l/dev-meta.rst
new file mode 100644
index 000000000..8ec3a73dc
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-meta.rst
@@ -0,0 +1,67 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _metadata:
+
+******************
+Metadata Interface
+******************
+
+Metadata refers to any non-image data that supplements video frames with
+additional information. This may include statistics computed over the image,
+frame capture parameters supplied by the image source or device specific
+parameters for specifying how the device processes images. This interface is
+intended for transfer of metadata between the userspace and the hardware and
+control of that operation.
+
+The metadata interface is implemented on video device nodes. The device can be
+dedicated to metadata or can support both video and metadata as specified in its
+reported capabilities.
+
+Querying Capabilities
+=====================
+
+Device nodes supporting the metadata capture interface set the
+``V4L2_CAP_META_CAPTURE`` flag in the ``device_caps`` field of the
+:c:type:`v4l2_capability` structure returned by the :c:func:`VIDIOC_QUERYCAP`
+ioctl. That flag means the device can capture metadata to memory. Similarly,
+device nodes supporting metadata output interface set the
+``V4L2_CAP_META_OUTPUT`` flag in the ``device_caps`` field of
+:c:type:`v4l2_capability` structure. That flag means the device can read
+metadata from memory.
+
+At least one of the read/write or streaming I/O methods must be supported.
+
+
+Data Format Negotiation
+=======================
+
+The metadata device uses the :ref:`format` ioctls to select the capture format.
+The metadata buffer content format is bound to that selected format. In addition
+to the basic :ref:`format` ioctls, the :c:func:`VIDIOC_ENUM_FMT` ioctl must be
+supported as well.
+
+To use the :ref:`format` ioctls applications set the ``type`` field of the
+:c:type:`v4l2_format` structure to ``V4L2_BUF_TYPE_META_CAPTURE`` or to
+``V4L2_BUF_TYPE_META_OUTPUT`` and use the :c:type:`v4l2_meta_format` ``meta``
+member of the ``fmt`` union as needed per the desired operation. Both drivers
+and applications must set the remainder of the :c:type:`v4l2_format` structure
+to 0.
+
+.. c:type:: v4l2_meta_format
+
+.. tabularcolumns:: |p{1.4cm}|p{2.2cm}|p{13.9cm}|
+
+.. flat-table:: struct v4l2_meta_format
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``dataformat``
+      - The data format, set by the application. This is a little endian
+        :ref:`four character code <v4l2-fourcc>`. V4L2 defines metadata formats
+        in :ref:`meta-formats`.
+    * - __u32
+      - ``buffersize``
+      - Maximum buffer size in bytes required for data. The value is set by the
+        driver.
diff --git a/Documentation/userspace-api/media/v4l/dev-osd.rst b/Documentation/userspace-api/media/v4l/dev-osd.rst
new file mode 100644
index 000000000..8e4be9129
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-osd.rst
@@ -0,0 +1,150 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _osd:
+
+******************************
+Video Output Overlay Interface
+******************************
+
+**Also known as On-Screen Display (OSD)**
+
+Some video output devices can overlay a framebuffer image onto the
+outgoing video signal. Applications can set up such an overlay using
+this interface, which borrows structures and ioctls of the
+:ref:`Video Overlay <overlay>` interface.
+
+The OSD function is accessible through the same character special file
+as the :ref:`Video Output <capture>` function.
+
+.. note::
+
+   The default function of such a ``/dev/video`` device is video
+   capturing or output. The OSD function is only available after calling
+   the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl.
+
+
+Querying Capabilities
+=====================
+
+Devices supporting the *Video Output Overlay* interface set the
+``V4L2_CAP_VIDEO_OUTPUT_OVERLAY`` flag in the ``capabilities`` field of
+struct :c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl.
+
+
+Framebuffer
+===========
+
+Contrary to the *Video Overlay* interface the framebuffer is normally
+implemented on the TV card and not the graphics card. On Linux it is
+accessible as a framebuffer device (``/dev/fbN``). Given a V4L2 device,
+applications can find the corresponding framebuffer device by calling
+the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` ioctl. It returns, amongst
+other information, the physical address of the framebuffer in the
+``base`` field of struct :c:type:`v4l2_framebuffer`.
+The framebuffer device ioctl ``FBIOGET_FSCREENINFO`` returns the same
+address in the ``smem_start`` field of struct
+:c:type:`fb_fix_screeninfo`. The ``FBIOGET_FSCREENINFO``
+ioctl and struct :c:type:`fb_fix_screeninfo` are defined in
+the ``linux/fb.h`` header file.
+
+The width and height of the framebuffer depends on the current video
+standard. A V4L2 driver may reject attempts to change the video standard
+(or any other ioctl which would imply a framebuffer size change) with an
+``EBUSY`` error code until all applications closed the framebuffer device.
+
+Example: Finding a framebuffer device for OSD
+---------------------------------------------
+
+.. code-block:: c
+
+    #include <linux/fb.h>
+
+    struct v4l2_framebuffer fbuf;
+    unsigned int i;
+    int fb_fd;
+
+    if (-1 == ioctl(fd, VIDIOC_G_FBUF, &fbuf)) {
+	perror("VIDIOC_G_FBUF");
+	exit(EXIT_FAILURE);
+    }
+
+    for (i = 0; i < 30; i++) {
+	char dev_name[16];
+	struct fb_fix_screeninfo si;
+
+	snprintf(dev_name, sizeof(dev_name), "/dev/fb%u", i);
+
+	fb_fd = open(dev_name, O_RDWR);
+	if (-1 == fb_fd) {
+	    switch (errno) {
+	    case ENOENT: /* no such file */
+	    case ENXIO:  /* no driver */
+		continue;
+
+	    default:
+		perror("open");
+		exit(EXIT_FAILURE);
+	    }
+	}
+
+	if (0 == ioctl(fb_fd, FBIOGET_FSCREENINFO, &si)) {
+	    if (si.smem_start == (unsigned long)fbuf.base)
+		break;
+	} else {
+	    /* Apparently not a framebuffer device. */
+	}
+
+	close(fb_fd);
+	fb_fd = -1;
+    }
+
+    /* fb_fd is the file descriptor of the framebuffer device
+       for the video output overlay, or -1 if no device was found. */
+
+
+Overlay Window and Scaling
+==========================
+
+The overlay is controlled by source and target rectangles. The source
+rectangle selects a subsection of the framebuffer image to be overlaid,
+the target rectangle an area in the outgoing video signal where the
+image will appear. Drivers may or may not support scaling, and arbitrary
+sizes and positions of these rectangles. Further drivers may support any
+(or none) of the clipping/blending methods defined for the
+:ref:`Video Overlay <overlay>` interface.
+
+A struct :c:type:`v4l2_window` defines the size of the
+source rectangle, its position in the framebuffer and the
+clipping/blending method to be used for the overlay. To get the current
+parameters applications set the ``type`` field of a struct
+:c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY`` and call the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl. The driver fills the
+struct :c:type:`v4l2_window` substructure named ``win``. It is not
+possible to retrieve a previously programmed clipping list or bitmap.
+
+To program the source rectangle applications set the ``type`` field of a
+struct :c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY``, initialize the ``win``
+substructure and call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl.
+The driver adjusts the parameters against hardware limits and returns
+the actual parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. Like :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`,
+the :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl can be used to learn
+about driver capabilities without actually changing driver state. Unlike
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` this also works after the overlay has been enabled.
+
+A struct :c:type:`v4l2_crop` defines the size and position
+of the target rectangle. The scaling factor of the overlay is implied by
+the width and height given in struct :c:type:`v4l2_window`
+and struct :c:type:`v4l2_crop`. The cropping API applies to
+*Video Output* and *Video Output Overlay* devices in the same way as to
+*Video Capture* and *Video Overlay* devices, merely reversing the
+direction of the data flow. For more information see :ref:`crop`.
+
+
+Enabling Overlay
+================
+
+There is no V4L2 ioctl to enable or disable the overlay, however the
+framebuffer interface of the driver may support the ``FBIOBLANK`` ioctl.
diff --git a/Documentation/userspace-api/media/v4l/dev-output.rst b/Documentation/userspace-api/media/v4l/dev-output.rst
new file mode 100644
index 000000000..eadcb4aa8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-output.rst
@@ -0,0 +1,98 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _output:
+
+**********************
+Video Output Interface
+**********************
+
+Video output devices encode stills or image sequences as analog video
+signal. With this interface applications can control the encoding
+process and move images from user space to the driver.
+
+Conventionally V4L2 video output devices are accessed through character
+device special files named ``/dev/video`` and ``/dev/video0`` to
+``/dev/video63`` with major number 81 and minor numbers 0 to 63.
+``/dev/video`` is typically a symbolic link to the preferred video
+device.
+
+.. note:: The same device file names are used also for video capture devices.
+
+Querying Capabilities
+=====================
+
+Devices supporting the video output interface set the
+``V4L2_CAP_VIDEO_OUTPUT`` or ``V4L2_CAP_VIDEO_OUTPUT_MPLANE`` flag in
+the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. As secondary device
+functions they may also support the :ref:`raw VBI output <raw-vbi>`
+(``V4L2_CAP_VBI_OUTPUT``) interface. At least one of the read/write or
+streaming I/O methods must be supported. Modulators and audio outputs
+are optional.
+
+Supplemental Functions
+======================
+
+Video output devices shall support :ref:`audio output <audio>`,
+:ref:`modulator <tuner>`, :ref:`controls <control>`,
+:ref:`cropping and scaling <crop>` and
+:ref:`streaming parameter <streaming-par>` ioctls as needed. The
+:ref:`video output <video>` ioctls must be supported by all video
+output devices.
+
+Image Format Negotiation
+========================
+
+The output is determined by cropping and image format parameters. The
+former select an area of the video picture where the image will appear,
+the latter how images are stored in memory, i. e. in RGB or YUV format,
+the number of bits per pixel or width and height. Together they also
+define how images are scaled in the process.
+
+As usual these parameters are *not* reset at :c:func:`open()`
+time to permit Unix tool chains, programming a device and then writing
+to it as if it was a plain file. Well written V4L2 applications ensure
+they really get what they want, including cropping and scaling.
+
+Cropping initialization at minimum requires to reset the parameters to
+defaults. An example is given in :ref:`crop`.
+
+To query the current image format applications set the ``type`` field of
+a struct :c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_VIDEO_OUTPUT`` or ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``
+and call the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl with a pointer
+to this structure. Drivers fill the struct
+:c:type:`v4l2_pix_format` ``pix`` or the struct
+:c:type:`v4l2_pix_format_mplane` ``pix_mp``
+member of the ``fmt`` union.
+
+To request different parameters applications set the ``type`` field of a
+struct :c:type:`v4l2_format` as above and initialize all
+fields of the struct :c:type:`v4l2_pix_format`
+``vbi`` member of the ``fmt`` union, or better just modify the results
+of :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, and call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+ioctl with a pointer to this structure. Drivers may adjust the
+parameters and finally return the actual parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`
+does.
+
+Like :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` the :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl
+can be used to learn about hardware limitations without disabling I/O or
+possibly time consuming hardware preparations.
+
+The contents of struct :c:type:`v4l2_pix_format` and
+struct :c:type:`v4l2_pix_format_mplane` are
+discussed in :ref:`pixfmt`. See also the specification of the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctls for
+details. Video output devices must implement both the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`
+and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, even if :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ignores all
+requests and always returns default parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does.
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` is optional.
+
+Writing Images
+==============
+
+A video output device may support the :ref:`write() function <rw>`
+and/or streaming (:ref:`memory mapping <mmap>` or
+:ref:`user pointer <userp>`) I/O. See :ref:`io` for details.
diff --git a/Documentation/userspace-api/media/v4l/dev-overlay.rst b/Documentation/userspace-api/media/v4l/dev-overlay.rst
new file mode 100644
index 000000000..07cc92564
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-overlay.rst
@@ -0,0 +1,321 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _overlay:
+
+***********************
+Video Overlay Interface
+***********************
+
+**Also known as Framebuffer Overlay or Previewing.**
+
+Video overlay devices have the ability to genlock (TV-)video into the
+(VGA-)video signal of a graphics card, or to store captured images
+directly in video memory of a graphics card, typically with clipping.
+This can be considerable more efficient than capturing images and
+displaying them by other means. In the old days when only nuclear power
+plants needed cooling towers this used to be the only way to put live
+video into a window.
+
+Video overlay devices are accessed through the same character special
+files as :ref:`video capture <capture>` devices.
+
+.. note::
+
+   The default function of a ``/dev/video`` device is video
+   capturing. The overlay function is only available after calling
+   the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl.
+
+The driver may support simultaneous overlay and capturing using the
+read/write and streaming I/O methods. If so, operation at the nominal
+frame rate of the video standard is not guaranteed. Frames may be
+directed away from overlay to capture, or one field may be used for
+overlay and the other for capture if the capture parameters permit this.
+
+Applications should use different file descriptors for capturing and
+overlay. This must be supported by all drivers capable of simultaneous
+capturing and overlay. Optionally these drivers may also permit
+capturing and overlay with a single file descriptor for compatibility
+with V4L and earlier versions of V4L2. [#f1]_
+
+
+Querying Capabilities
+=====================
+
+Devices supporting the video overlay interface set the
+``V4L2_CAP_VIDEO_OVERLAY`` flag in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. The overlay I/O
+method specified below must be supported. Tuners and audio inputs are
+optional.
+
+
+Supplemental Functions
+======================
+
+Video overlay devices shall support :ref:`audio input <audio>`,
+:ref:`tuner`, :ref:`controls <control>`,
+:ref:`cropping and scaling <crop>` and
+:ref:`streaming parameter <streaming-par>` ioctls as needed. The
+:ref:`video input <video>` and :ref:`video standard <standard>`
+ioctls must be supported by all video overlay devices.
+
+
+Setup
+=====
+
+Before overlay can commence applications must program the driver with
+frame buffer parameters, namely the address and size of the frame buffer
+and the image format, for example RGB 5:6:5. The
+:ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` and
+:ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctls are available to get and
+set these parameters, respectively. The :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctl is
+privileged because it allows to set up DMA into physical memory,
+bypassing the memory protection mechanisms of the kernel. Only the
+superuser can change the frame buffer address and size. Users are not
+supposed to run TV applications as root or with SUID bit set. A small
+helper application with suitable privileges should query the graphics
+system and program the V4L2 driver at the appropriate time.
+
+Some devices add the video overlay to the output signal of the graphics
+card. In this case the frame buffer is not modified by the video device,
+and the frame buffer address and pixel format are not needed by the
+driver. The :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctl is not privileged. An application
+can check for this type of device by calling the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`
+ioctl.
+
+A driver may support any (or none) of five clipping/blending methods:
+
+1. Chroma-keying displays the overlaid image only where pixels in the
+   primary graphics surface assume a certain color.
+
+2. A bitmap can be specified where each bit corresponds to a pixel in
+   the overlaid image. When the bit is set, the corresponding video
+   pixel is displayed, otherwise a pixel of the graphics surface.
+
+3. A list of clipping rectangles can be specified. In these regions *no*
+   video is displayed, so the graphics surface can be seen here.
+
+4. The framebuffer has an alpha channel that can be used to clip or
+   blend the framebuffer with the video.
+
+5. A global alpha value can be specified to blend the framebuffer
+   contents with video images.
+
+When simultaneous capturing and overlay is supported and the hardware
+prohibits different image and frame buffer formats, the format requested
+first takes precedence. The attempt to capture
+(:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`) or overlay
+(:ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`) may fail with an ``EBUSY`` error
+code or return accordingly modified parameters..
+
+
+Overlay Window
+==============
+
+The overlaid image is determined by cropping and overlay window
+parameters. The former select an area of the video picture to capture,
+the latter how images are overlaid and clipped. Cropping initialization
+at minimum requires to reset the parameters to defaults. An example is
+given in :ref:`crop`.
+
+The overlay window is described by a struct
+:c:type:`v4l2_window`. It defines the size of the image,
+its position over the graphics surface and the clipping to be applied.
+To get the current parameters applications set the ``type`` field of a
+struct :c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_VIDEO_OVERLAY`` and call the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl. The driver fills the
+struct :c:type:`v4l2_window` substructure named ``win``. It is not
+possible to retrieve a previously programmed clipping list or bitmap.
+
+To program the overlay window applications set the ``type`` field of a
+struct :c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_VIDEO_OVERLAY``, initialize the ``win`` substructure and
+call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. The driver
+adjusts the parameters against hardware limits and returns the actual
+parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. Like :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`, the
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl can be used to learn
+about driver capabilities without actually changing driver state. Unlike
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` this also works after the overlay has been enabled.
+
+The scaling factor of the overlaid image is implied by the width and
+height given in struct :c:type:`v4l2_window` and the size
+of the cropping rectangle. For more information see :ref:`crop`.
+
+When simultaneous capturing and overlay is supported and the hardware
+prohibits different image and window sizes, the size requested first
+takes precedence. The attempt to capture or overlay as well
+(:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`) may fail with an ``EBUSY`` error
+code or return accordingly modified parameters.
+
+
+.. c:type:: v4l2_window
+
+struct v4l2_window
+------------------
+
+``struct v4l2_rect w``
+    Size and position of the window relative to the top, left corner of
+    the frame buffer defined with
+    :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`. The window can extend the
+    frame buffer width and height, the ``x`` and ``y`` coordinates can
+    be negative, and it can lie completely outside the frame buffer. The
+    driver clips the window accordingly, or if that is not possible,
+    modifies its size and/or position.
+
+``enum v4l2_field field``
+    Applications set this field to determine which video field shall be
+    overlaid, typically one of ``V4L2_FIELD_ANY`` (0),
+    ``V4L2_FIELD_TOP``, ``V4L2_FIELD_BOTTOM`` or
+    ``V4L2_FIELD_INTERLACED``. Drivers may have to choose a different
+    field order and return the actual setting here.
+
+``__u32 chromakey``
+    When chroma-keying has been negotiated with
+    :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` applications set this field
+    to the desired pixel value for the chroma key. The format is the
+    same as the pixel format of the framebuffer (struct
+    :c:type:`v4l2_framebuffer` ``fmt.pixelformat``
+    field), with bytes in host order. E. g. for
+    :ref:`V4L2_PIX_FMT_BGR24 <V4L2-PIX-FMT-BGR32>` the value should
+    be 0xRRGGBB on a little endian, 0xBBGGRR on a big endian host.
+
+``struct v4l2_clip * clips``
+    When chroma-keying has *not* been negotiated and
+    :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` indicated this capability,
+    applications can set this field to point to an array of clipping
+    rectangles.
+
+    Like the window coordinates w, clipping rectangles are defined
+    relative to the top, left corner of the frame buffer. However
+    clipping rectangles must not extend the frame buffer width and
+    height, and they must not overlap. If possible applications
+    should merge adjacent rectangles. Whether this must create
+    x-y or y-x bands, or the order of rectangles, is not defined. When
+    clip lists are not supported the driver ignores this field. Its
+    contents after calling :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+    are undefined.
+
+``__u32 clipcount``
+    When the application set the ``clips`` field, this field must
+    contain the number of clipping rectangles in the list. When clip
+    lists are not supported the driver ignores this field, its contents
+    after calling :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` are undefined. When clip lists are
+    supported but no clipping is desired this field must be set to zero.
+
+``void * bitmap``
+    When chroma-keying has *not* been negotiated and
+    :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` indicated this capability,
+    applications can set this field to point to a clipping bit mask.
+
+It must be of the same size as the window, ``w.width`` and ``w.height``.
+Each bit corresponds to a pixel in the overlaid image, which is
+displayed only when the bit is *set*. Pixel coordinates translate to
+bits like:
+
+
+.. code-block:: c
+
+    ((__u8 *) bitmap)[w.width * y + x / 8] & (1 << (x & 7))
+
+where ``0`` ≤ x < ``w.width`` and ``0`` ≤ y <``w.height``. [#f2]_
+
+When a clipping bit mask is not supported the driver ignores this field,
+its contents after calling :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` are
+undefined. When a bit mask is supported but no clipping is desired this
+field must be set to ``NULL``.
+
+Applications need not create a clip list or bit mask. When they pass
+both, or despite negotiating chroma-keying, the results are undefined.
+Regardless of the chosen method, the clipping abilities of the hardware
+may be limited in quantity or quality. The results when these limits are
+exceeded are undefined. [#f3]_
+
+``__u8 global_alpha``
+    The global alpha value used to blend the framebuffer with video
+    images, if global alpha blending has been negotiated
+    (``V4L2_FBUF_FLAG_GLOBAL_ALPHA``, see
+    :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`,
+    :ref:`framebuffer-flags`).
+
+.. note::
+
+   This field was added in Linux 2.6.23, extending the
+   structure. However the :ref:`VIDIOC_[G|S|TRY]_FMT <VIDIOC_G_FMT>`
+   ioctls, which take a pointer to a :c:type:`v4l2_format`
+   parent structure with padding bytes at the end, are not affected.
+
+
+.. c:type:: v4l2_clip
+
+struct v4l2_clip [#f4]_
+-----------------------
+
+``struct v4l2_rect c``
+    Coordinates of the clipping rectangle, relative to the top, left
+    corner of the frame buffer. Only window pixels *outside* all
+    clipping rectangles are displayed.
+
+``struct v4l2_clip * next``
+    Pointer to the next clipping rectangle, ``NULL`` when this is the last
+    rectangle. Drivers ignore this field, it cannot be used to pass a
+    linked list of clipping rectangles.
+
+
+.. c:type:: v4l2_rect
+
+struct v4l2_rect
+----------------
+
+``__s32 left``
+    Horizontal offset of the top, left corner of the rectangle, in
+    pixels.
+
+``__s32 top``
+    Vertical offset of the top, left corner of the rectangle, in pixels.
+    Offsets increase to the right and down.
+
+``__u32 width``
+    Width of the rectangle, in pixels.
+
+``__u32 height``
+    Height of the rectangle, in pixels.
+
+
+Enabling Overlay
+================
+
+To start or stop the frame buffer overlay applications call the
+:ref:`VIDIOC_OVERLAY` ioctl.
+
+.. [#f1]
+   A common application of two file descriptors is the XFree86
+   :ref:`Xv/V4L <xvideo>` interface driver and a V4L2 application.
+   While the X server controls video overlay, the application can take
+   advantage of memory mapping and DMA.
+
+   In the opinion of the designers of this API, no driver writer taking
+   the efforts to support simultaneous capturing and overlay will
+   restrict this ability by requiring a single file descriptor, as in
+   V4L and earlier versions of V4L2. Making this optional means
+   applications depending on two file descriptors need backup routines
+   to be compatible with all drivers, which is considerable more work
+   than using two fds in applications which do not. Also two fd's fit
+   the general concept of one file descriptor for each logical stream.
+   Hence as a complexity trade-off drivers *must* support two file
+   descriptors and *may* support single fd operation.
+
+.. [#f2]
+   Should we require ``w.width`` to be a multiple of eight?
+
+.. [#f3]
+   When the image is written into frame buffer memory it will be
+   undesirable if the driver clips out less pixels than expected,
+   because the application and graphics system are not aware these
+   regions need to be refreshed. The driver should clip out more pixels
+   or not write the image at all.
+
+.. [#f4]
+   The X Window system defines "regions" which are vectors of ``struct
+   BoxRec { short x1, y1, x2, y2; }`` with ``width = x2 - x1`` and
+   ``height = y2 - y1``, so one cannot pass X11 clip lists directly.
diff --git a/Documentation/userspace-api/media/v4l/dev-radio.rst b/Documentation/userspace-api/media/v4l/dev-radio.rst
new file mode 100644
index 000000000..284ce96a1
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-radio.rst
@@ -0,0 +1,52 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _radio:
+
+***************
+Radio Interface
+***************
+
+This interface is intended for AM and FM (analog) radio receivers and
+transmitters.
+
+Conventionally V4L2 radio devices are accessed through character device
+special files named ``/dev/radio`` and ``/dev/radio0`` to
+``/dev/radio63`` with major number 81 and minor numbers 64 to 127.
+
+
+Querying Capabilities
+=====================
+
+Devices supporting the radio interface set the ``V4L2_CAP_RADIO`` and
+``V4L2_CAP_TUNER`` or ``V4L2_CAP_MODULATOR`` flag in the
+``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. Other combinations of
+capability flags are reserved for future extensions.
+
+
+Supplemental Functions
+======================
+
+Radio devices can support :ref:`controls <control>`, and must support
+the :ref:`tuner or modulator <tuner>` ioctls.
+
+They do not support the video input or output, audio input or output,
+video standard, cropping and scaling, compression and streaming
+parameter, or overlay ioctls. All other ioctls and I/O methods are
+reserved for future extensions.
+
+
+Programming
+===========
+
+Radio devices may have a couple audio controls (as discussed in
+:ref:`control`) such as a volume control, possibly custom controls.
+Further all radio devices have one tuner or modulator (these are
+discussed in :ref:`tuner`) with index number zero to select the radio
+frequency and to determine if a monaural or FM stereo program is
+received/emitted. Drivers switch automatically between AM and FM
+depending on the selected frequency. The
+:ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` or
+:ref:`VIDIOC_G_MODULATOR <VIDIOC_G_MODULATOR>` ioctl reports the
+supported frequency range.
diff --git a/Documentation/userspace-api/media/v4l/dev-raw-vbi.rst b/Documentation/userspace-api/media/v4l/dev-raw-vbi.rst
new file mode 100644
index 000000000..3f43a01ba
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-raw-vbi.rst
@@ -0,0 +1,292 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _raw-vbi:
+
+**********************
+Raw VBI Data Interface
+**********************
+
+VBI is an abbreviation of Vertical Blanking Interval, a gap in the
+sequence of lines of an analog video signal. During VBI no picture
+information is transmitted, allowing some time while the electron beam
+of a cathode ray tube TV returns to the top of the screen. Using an
+oscilloscope you will find here the vertical synchronization pulses and
+short data packages ASK modulated [#f1]_ onto the video signal. These are
+transmissions of services such as Teletext or Closed Caption.
+
+Subject of this interface type is raw VBI data, as sampled off a video
+signal, or to be added to a signal for output. The data format is
+similar to uncompressed video images, a number of lines times a number
+of samples per line, we call this a VBI image.
+
+Conventionally V4L2 VBI devices are accessed through character device
+special files named ``/dev/vbi`` and ``/dev/vbi0`` to ``/dev/vbi31``
+with major number 81 and minor numbers 224 to 255. ``/dev/vbi`` is
+typically a symbolic link to the preferred VBI device. This convention
+applies to both input and output devices.
+
+To address the problems of finding related video and VBI devices VBI
+capturing and output is also available as device function under
+``/dev/video``. To capture or output raw VBI data with these devices
+applications must call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl.
+Accessed as ``/dev/vbi``, raw VBI capturing or output is the default
+device function.
+
+Querying Capabilities
+=====================
+
+Devices supporting the raw VBI capturing or output API set the
+``V4L2_CAP_VBI_CAPTURE`` or ``V4L2_CAP_VBI_OUTPUT`` flags, respectively,
+in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. At least one of the
+read/write, streaming or asynchronous I/O methods must be supported. VBI
+devices may or may not have a tuner or modulator.
+
+Supplemental Functions
+======================
+
+VBI devices shall support :ref:`video input or output <video>`,
+:ref:`tuner or modulator <tuner>`, and :ref:`controls <control>`
+ioctls as needed. The :ref:`video standard <standard>` ioctls provide
+information vital to program a VBI device, therefore must be supported.
+
+Raw VBI Format Negotiation
+==========================
+
+Raw VBI sampling abilities can vary, in particular the sampling
+frequency. To properly interpret the data V4L2 specifies an ioctl to
+query the sampling parameters. Moreover, to allow for some flexibility
+applications can also suggest different parameters.
+
+As usual these parameters are *not* reset at :c:func:`open()`
+time to permit Unix tool chains, programming a device and then reading
+from it as if it was a plain file. Well written V4L2 applications should
+always ensure they really get what they want, requesting reasonable
+parameters and then checking if the actual parameters are suitable.
+
+To query the current raw VBI capture parameters applications set the
+``type`` field of a struct :c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_VBI_CAPTURE`` or ``V4L2_BUF_TYPE_VBI_OUTPUT``, and call
+the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl with a pointer to this
+structure. Drivers fill the struct
+:c:type:`v4l2_vbi_format` ``vbi`` member of the
+``fmt`` union.
+
+To request different parameters applications set the ``type`` field of a
+struct :c:type:`v4l2_format` as above and initialize all
+fields of the struct :c:type:`v4l2_vbi_format`
+``vbi`` member of the ``fmt`` union, or better just modify the results
+of :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, and call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+ioctl with a pointer to this structure. Drivers return an ``EINVAL`` error
+code only when the given parameters are ambiguous, otherwise they modify
+the parameters according to the hardware capabilities and return the
+actual parameters. When the driver allocates resources at this point, it
+may return an ``EBUSY`` error code to indicate the returned parameters are
+valid but the required resources are currently not available. That may
+happen for instance when the video and VBI areas to capture would
+overlap, or when the driver supports multiple opens and another process
+already requested VBI capturing or output. Anyway, applications must
+expect other resource allocation points which may return ``EBUSY``, at the
+:ref:`VIDIOC_STREAMON` ioctl and the first :c:func:`read()`
+, :c:func:`write()` and :c:func:`select()` calls.
+
+VBI devices must implement both the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, even if :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ignores all requests
+and always returns default parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does.
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` is optional.
+
+.. tabularcolumns:: |p{1.6cm}|p{4.2cm}|p{11.7cm}|
+
+.. c:type:: v4l2_vbi_format
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_vbi_format
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``sampling_rate``
+      - Samples per second, i. e. unit 1 Hz.
+    * - __u32
+      - ``offset``
+      - Horizontal offset of the VBI image, relative to the leading edge
+	of the line synchronization pulse and counted in samples: The
+	first sample in the VBI image will be located ``offset`` /
+	``sampling_rate`` seconds following the leading edge. See also
+	:ref:`vbi-hsync`.
+    * - __u32
+      - ``samples_per_line``
+      -
+    * - __u32
+      - ``sample_format``
+      - Defines the sample format as in :ref:`pixfmt`, a
+	four-character-code. [#f2]_ Usually this is ``V4L2_PIX_FMT_GREY``,
+	i. e. each sample consists of 8 bits with lower values oriented
+	towards the black level. Do not assume any other correlation of
+	values with the signal level. For example, the MSB does not
+	necessarily indicate if the signal is 'high' or 'low' because 128
+	may not be the mean value of the signal. Drivers shall not convert
+	the sample format by software.
+    * - __u32
+      - ``start``\ [#f2]_
+      - This is the scanning system line number associated with the first
+	line of the VBI image, of the first and the second field
+	respectively. See :ref:`vbi-525` and :ref:`vbi-625` for valid
+	values. The ``V4L2_VBI_ITU_525_F1_START``,
+	``V4L2_VBI_ITU_525_F2_START``, ``V4L2_VBI_ITU_625_F1_START`` and
+	``V4L2_VBI_ITU_625_F2_START`` defines give the start line numbers
+	for each field for each 525 or 625 line format as a convenience.
+	Don't forget that ITU line numbering starts at 1, not 0. VBI input
+	drivers can return start values 0 if the hardware cannot reliable
+	identify scanning lines, VBI acquisition may not require this
+	information.
+    * - __u32
+      - ``count``\ [#f2]_
+      - The number of lines in the first and second field image,
+	respectively.
+    * - :cspan:`2`
+
+	Drivers should be as flexibility as possible. For example, it may
+	be possible to extend or move the VBI capture window down to the
+	picture area, implementing a 'full field mode' to capture data
+	service transmissions embedded in the picture.
+
+	An application can set the first or second ``count`` value to zero
+	if no data is required from the respective field; ``count``\ [1]
+	if the scanning system is progressive, i. e. not interlaced. The
+	corresponding start value shall be ignored by the application and
+	driver. Anyway, drivers may not support single field capturing and
+	return both count values non-zero.
+
+	Both ``count`` values set to zero, or line numbers are outside the
+	bounds depicted\ [#f4]_, or a field image covering lines of two
+	fields, are invalid and shall not be returned by the driver.
+
+	To initialize the ``start`` and ``count`` fields, applications
+	must first determine the current video standard selection. The
+	:ref:`v4l2_std_id <v4l2-std-id>` or the ``framelines`` field
+	of struct :c:type:`v4l2_standard` can be evaluated
+	for this purpose.
+    * - __u32
+      - ``flags``
+      - See :ref:`vbifmt-flags` below. Currently only drivers set flags,
+	applications must set this field to zero.
+    * - __u32
+      - ``reserved``\ [#f2]_
+      - This array is reserved for future extensions. Drivers and
+	applications must set it to zero.
+
+.. tabularcolumns:: |p{4.4cm}|p{1.5cm}|p{11.6cm}|
+
+.. _vbifmt-flags:
+
+.. flat-table:: Raw VBI Format Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_VBI_UNSYNC``
+      - 0x0001
+      - This flag indicates hardware which does not properly distinguish
+	between fields. Normally the VBI image stores the first field
+	(lower scanning line numbers) first in memory. This may be a top
+	or bottom field depending on the video standard. When this flag is
+	set the first or second field may be stored first, however the
+	fields are still in correct temporal order with the older field
+	first in memory. [#f3]_
+    * - ``V4L2_VBI_INTERLACED``
+      - 0x0002
+      - By default the two field images will be passed sequentially; all
+	lines of the first field followed by all lines of the second field
+	(compare :ref:`field-order` ``V4L2_FIELD_SEQ_TB`` and
+	``V4L2_FIELD_SEQ_BT``, whether the top or bottom field is first in
+	memory depends on the video standard). When this flag is set, the
+	two fields are interlaced (cf. ``V4L2_FIELD_INTERLACED``). The
+	first line of the first field followed by the first line of the
+	second field, then the two second lines, and so on. Such a layout
+	may be necessary when the hardware has been programmed to capture
+	or output interlaced video images and is unable to separate the
+	fields for VBI capturing at the same time. For simplicity setting
+	this flag implies that both ``count`` values are equal and
+	non-zero.
+
+
+.. _vbi-hsync:
+
+.. kernel-figure:: vbi_hsync.svg
+    :alt:   vbi_hsync.svg
+    :align: center
+
+    **Figure 4.1. Line synchronization**
+
+.. _vbi-525:
+
+.. kernel-figure:: vbi_525.svg
+    :alt:   vbi_525.svg
+    :align: center
+
+    **Figure 4.2. ITU-R 525 line numbering (M/NTSC and M/PAL)**
+
+.. _vbi-625:
+
+.. kernel-figure:: vbi_625.svg
+    :alt:   vbi_625.svg
+    :align: center
+
+    **Figure 4.3. ITU-R 625 line numbering**
+
+Remember the VBI image format depends on the selected video standard,
+therefore the application must choose a new standard or query the
+current standard first. Attempts to read or write data ahead of format
+negotiation, or after switching the video standard which may invalidate
+the negotiated VBI parameters, should be refused by the driver. A format
+change during active I/O is not permitted.
+
+Reading and writing VBI images
+==============================
+
+To assure synchronization with the field number and easier
+implementation, the smallest unit of data passed at a time is one frame,
+consisting of two fields of VBI images immediately following in memory.
+
+The total size of a frame computes as follows:
+
+.. code-block:: c
+
+    (count[0] + count[1]) * samples_per_line * sample size in bytes
+
+The sample size is most likely always one byte, applications must check
+the ``sample_format`` field though, to function properly with other
+drivers.
+
+A VBI device may support :ref:`read/write <rw>` and/or streaming
+(:ref:`memory mapping <mmap>` or :ref:`user pointer <userp>`) I/O.
+The latter bears the possibility of synchronizing video and VBI data by
+using buffer timestamps.
+
+Remember the :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` ioctl and the
+first :c:func:`read()`, :c:func:`write()` and
+:c:func:`select()` call can be resource allocation
+points returning an ``EBUSY`` error code if the required hardware resources
+are temporarily unavailable, for example the device is already in use by
+another process.
+
+.. [#f1]
+   ASK: Amplitude-Shift Keying. A high signal level represents a '1'
+   bit, a low level a '0' bit.
+
+.. [#f2]
+   A few devices may be unable to sample VBI data at all but can extend
+   the video capture window to the VBI region.
+
+.. [#f3]
+   Most VBI services transmit on both fields, but some have different
+   semantics depending on the field number. These cannot be reliable
+   decoded or encoded when ``V4L2_VBI_UNSYNC`` is set.
+
+.. [#f4]
+   The valid values ar shown at :ref:`vbi-525` and :ref:`vbi-625`.
diff --git a/Documentation/userspace-api/media/v4l/dev-rds.rst b/Documentation/userspace-api/media/v4l/dev-rds.rst
new file mode 100644
index 000000000..207216d5e
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-rds.rst
@@ -0,0 +1,178 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _rds:
+
+*************
+RDS Interface
+*************
+
+The Radio Data System transmits supplementary information in binary
+format, for example the station name or travel information, on an
+inaudible audio subcarrier of a radio program. This interface is aimed
+at devices capable of receiving and/or transmitting RDS information.
+
+For more information see the core RDS standard :ref:`iec62106` and the
+RBDS standard :ref:`nrsc4`.
+
+.. note::
+
+   Note that the RBDS standard as is used in the USA is almost
+   identical to the RDS standard. Any RDS decoder/encoder can also handle
+   RBDS. Only some of the fields have slightly different meanings. See the
+   RBDS standard for more information.
+
+The RBDS standard also specifies support for MMBS (Modified Mobile
+Search). This is a proprietary format which seems to be discontinued.
+The RDS interface does not support this format. Should support for MMBS
+(or the so-called 'E blocks' in general) be needed, then please contact
+the linux-media mailing list:
+`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__.
+
+Querying Capabilities
+=====================
+
+Devices supporting the RDS capturing API set the
+``V4L2_CAP_RDS_CAPTURE`` flag in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. Any tuner that
+supports RDS will set the ``V4L2_TUNER_CAP_RDS`` flag in the
+``capability`` field of struct :c:type:`v4l2_tuner`. If the
+driver only passes RDS blocks without interpreting the data the
+``V4L2_TUNER_CAP_RDS_BLOCK_IO`` flag has to be set, see
+:ref:`Reading RDS data <reading-rds-data>`. For future use the flag
+``V4L2_TUNER_CAP_RDS_CONTROLS`` has also been defined. However, a driver
+for a radio tuner with this capability does not yet exist, so if you are
+planning to write such a driver you should discuss this on the
+linux-media mailing list:
+`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__.
+
+Whether an RDS signal is present can be detected by looking at the
+``rxsubchans`` field of struct :c:type:`v4l2_tuner`: the
+``V4L2_TUNER_SUB_RDS`` will be set if RDS data was detected.
+
+Devices supporting the RDS output API set the ``V4L2_CAP_RDS_OUTPUT``
+flag in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. Any modulator that
+supports RDS will set the ``V4L2_TUNER_CAP_RDS`` flag in the
+``capability`` field of struct
+:c:type:`v4l2_modulator`. In order to enable the RDS
+transmission one must set the ``V4L2_TUNER_SUB_RDS`` bit in the
+``txsubchans`` field of struct
+:c:type:`v4l2_modulator`. If the driver only passes RDS
+blocks without interpreting the data the ``V4L2_TUNER_CAP_RDS_BLOCK_IO``
+flag has to be set. If the tuner is capable of handling RDS entities
+like program identification codes and radio text, the flag
+``V4L2_TUNER_CAP_RDS_CONTROLS`` should be set, see
+:ref:`Writing RDS data <writing-rds-data>` and
+:ref:`FM Transmitter Control Reference <fm-tx-controls>`.
+
+.. _reading-rds-data:
+
+Reading RDS data
+================
+
+RDS data can be read from the radio device with the
+:c:func:`read()` function. The data is packed in groups of
+three bytes.
+
+.. _writing-rds-data:
+
+Writing RDS data
+================
+
+RDS data can be written to the radio device with the
+:c:func:`write()` function. The data is packed in groups of
+three bytes, as follows:
+
+RDS datastructures
+==================
+
+.. c:type:: v4l2_rds_data
+
+.. tabularcolumns:: |p{2.5cm}|p{2.5cm}|p{12.5cm}|
+
+.. flat-table:: struct v4l2_rds_data
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 5
+
+    * - __u8
+      - ``lsb``
+      - Least Significant Byte of RDS Block
+    * - __u8
+      - ``msb``
+      - Most Significant Byte of RDS Block
+    * - __u8
+      - ``block``
+      - Block description
+
+
+.. _v4l2-rds-block:
+
+.. tabularcolumns:: |p{2.9cm}|p{14.6cm}|
+
+.. flat-table:: Block description
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 5
+
+    * - Bits 0-2
+      - Block (aka offset) of the received data.
+    * - Bits 3-5
+      - Deprecated. Currently identical to bits 0-2. Do not use these
+	bits.
+    * - Bit 6
+      - Corrected bit. Indicates that an error was corrected for this data
+	block.
+    * - Bit 7
+      - Error bit. Indicates that an uncorrectable error occurred during
+	reception of this block.
+
+
+.. _v4l2-rds-block-codes:
+
+.. tabularcolumns:: |p{6.4cm}|p{2.0cm}|p{1.2cm}|p{7.9cm}|
+
+.. flat-table:: Block defines
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 1 5
+
+    * - V4L2_RDS_BLOCK_MSK
+      -
+      - 7
+      - Mask for bits 0-2 to get the block ID.
+    * - V4L2_RDS_BLOCK_A
+      -
+      - 0
+      - Block A.
+    * - V4L2_RDS_BLOCK_B
+      -
+      - 1
+      - Block B.
+    * - V4L2_RDS_BLOCK_C
+      -
+      - 2
+      - Block C.
+    * - V4L2_RDS_BLOCK_D
+      -
+      - 3
+      - Block D.
+    * - V4L2_RDS_BLOCK_C_ALT
+      -
+      - 4
+      - Block C'.
+    * - V4L2_RDS_BLOCK_INVALID
+      - read-only
+      - 7
+      - An invalid block.
+    * - V4L2_RDS_BLOCK_CORRECTED
+      - read-only
+      - 0x40
+      - A bit error was detected but corrected.
+    * - V4L2_RDS_BLOCK_ERROR
+      - read-only
+      - 0x80
+      - An uncorrectable error occurred.
diff --git a/Documentation/userspace-api/media/v4l/dev-sdr.rst b/Documentation/userspace-api/media/v4l/dev-sdr.rst
new file mode 100644
index 000000000..80b25a7e8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-sdr.rst
@@ -0,0 +1,107 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _sdr:
+
+**************************************
+Software Defined Radio Interface (SDR)
+**************************************
+
+SDR is an abbreviation of Software Defined Radio, the radio device which
+uses application software for modulation or demodulation. This interface
+is intended for controlling and data streaming of such devices.
+
+SDR devices are accessed through character device special files named
+``/dev/swradio0`` to ``/dev/swradio255`` with major number 81 and
+dynamically allocated minor numbers 0 to 255.
+
+
+Querying Capabilities
+=====================
+
+Devices supporting the SDR receiver interface set the
+``V4L2_CAP_SDR_CAPTURE`` and ``V4L2_CAP_TUNER`` flag in the
+``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. That flag means the
+device has an Analog to Digital Converter (ADC), which is a mandatory
+element for the SDR receiver.
+
+Devices supporting the SDR transmitter interface set the
+``V4L2_CAP_SDR_OUTPUT`` and ``V4L2_CAP_MODULATOR`` flag in the
+``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. That flag means the
+device has an Digital to Analog Converter (DAC), which is a mandatory
+element for the SDR transmitter.
+
+At least one of the read/write, streaming or asynchronous I/O methods
+must be supported.
+
+
+Supplemental Functions
+======================
+
+SDR devices can support :ref:`controls <control>`, and must support
+the :ref:`tuner` ioctls. Tuner ioctls are used for setting the
+ADC/DAC sampling rate (sampling frequency) and the possible radio
+frequency (RF).
+
+The ``V4L2_TUNER_SDR`` tuner type is used for setting SDR device ADC/DAC
+frequency, and the ``V4L2_TUNER_RF`` tuner type is used for setting
+radio frequency. The tuner index of the RF tuner (if any) must always
+follow the SDR tuner index. Normally the SDR tuner is #0 and the RF
+tuner is #1.
+
+The :ref:`VIDIOC_S_HW_FREQ_SEEK` ioctl is
+not supported.
+
+
+Data Format Negotiation
+=======================
+
+The SDR device uses the :ref:`format` ioctls to select the
+capture and output format. Both the sampling resolution and the data
+streaming format are bound to that selectable format. In addition to the
+basic :ref:`format` ioctls, the
+:ref:`VIDIOC_ENUM_FMT` ioctl must be supported as
+well.
+
+To use the :ref:`format` ioctls applications set the ``type``
+field of a struct :c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_SDR_CAPTURE`` or ``V4L2_BUF_TYPE_SDR_OUTPUT`` and use
+the struct :c:type:`v4l2_sdr_format` ``sdr`` member
+of the ``fmt`` union as needed per the desired operation. Currently
+there are two fields, ``pixelformat`` and ``buffersize``, of
+struct :c:type:`v4l2_sdr_format` which are used.
+Content of the ``pixelformat`` is V4L2 FourCC code of the data format.
+The ``buffersize`` field is maximum buffer size in bytes required for
+data transfer, set by the driver in order to inform application.
+
+
+.. c:type:: v4l2_sdr_format
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_sdr_format
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``pixelformat``
+      - The data format or type of compression, set by the application.
+	This is a little endian
+	:ref:`four character code <v4l2-fourcc>`. V4L2 defines SDR
+	formats in :ref:`sdr-formats`.
+    * - __u32
+      - ``buffersize``
+      - Maximum size in bytes required for data. Value is set by the
+	driver.
+    * - __u8
+      - ``reserved[24]``
+      - This array is reserved for future extensions. Drivers and
+	applications must set it to zero.
+
+
+An SDR device may support :ref:`read/write <rw>` and/or streaming
+(:ref:`memory mapping <mmap>` or :ref:`user pointer <userp>`) I/O.
diff --git a/Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst b/Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst
new file mode 100644
index 000000000..f0df144c9
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst
@@ -0,0 +1,645 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _sliced:
+
+*************************
+Sliced VBI Data Interface
+*************************
+
+VBI stands for Vertical Blanking Interval, a gap in the sequence of
+lines of an analog video signal. During VBI no picture information is
+transmitted, allowing some time while the electron beam of a cathode ray
+tube TV returns to the top of the screen.
+
+Sliced VBI devices use hardware to demodulate data transmitted in the
+VBI. V4L2 drivers shall *not* do this by software, see also the
+:ref:`raw VBI interface <raw-vbi>`. The data is passed as short
+packets of fixed size, covering one scan line each. The number of
+packets per video frame is variable.
+
+Sliced VBI capture and output devices are accessed through the same
+character special files as raw VBI devices. When a driver supports both
+interfaces, the default function of a ``/dev/vbi`` device is *raw* VBI
+capturing or output, and the sliced VBI function is only available after
+calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl as defined
+below. Likewise a ``/dev/video`` device may support the sliced VBI API,
+however the default function here is video capturing or output.
+Different file descriptors must be used to pass raw and sliced VBI data
+simultaneously, if this is supported by the driver.
+
+Querying Capabilities
+=====================
+
+Devices supporting the sliced VBI capturing or output API set the
+``V4L2_CAP_SLICED_VBI_CAPTURE`` or ``V4L2_CAP_SLICED_VBI_OUTPUT`` flag
+respectively, in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl. At least one of the
+read/write, streaming or asynchronous :ref:`I/O methods <io>` must be
+supported. Sliced VBI devices may have a tuner or modulator.
+
+Supplemental Functions
+======================
+
+Sliced VBI devices shall support :ref:`video input or output <video>`
+and :ref:`tuner or modulator <tuner>` ioctls if they have these
+capabilities, and they may support :ref:`control` ioctls.
+The :ref:`video standard <standard>` ioctls provide information vital
+to program a sliced VBI device, therefore must be supported.
+
+.. _sliced-vbi-format-negotitation:
+
+Sliced VBI Format Negotiation
+=============================
+
+To find out which data services are supported by the hardware
+applications can call the
+:ref:`VIDIOC_G_SLICED_VBI_CAP <VIDIOC_G_SLICED_VBI_CAP>` ioctl.
+All drivers implementing the sliced VBI interface must support this
+ioctl. The results may differ from those of the
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl when the number of VBI
+lines the hardware can capture or output per frame, or the number of
+services it can identify on a given line are limited. For example on PAL
+line 16 the hardware may be able to look for a VPS or Teletext signal,
+but not both at the same time.
+
+To determine the currently selected services applications set the
+``type`` field of struct :c:type:`v4l2_format` to
+``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` or
+``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT``, and the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl fills the ``fmt.sliced``
+member, a struct
+:c:type:`v4l2_sliced_vbi_format`.
+
+Applications can request different parameters by initializing or
+modifying the ``fmt.sliced`` member and calling the
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with a pointer to the
+struct :c:type:`v4l2_format` structure.
+
+The sliced VBI API is more complicated than the raw VBI API because the
+hardware must be told which VBI service to expect on each scan line. Not
+all services may be supported by the hardware on all lines (this is
+especially true for VBI output where Teletext is often unsupported and
+other services can only be inserted in one specific line). In many
+cases, however, it is sufficient to just set the ``service_set`` field
+to the required services and let the driver fill the ``service_lines``
+array according to hardware capabilities. Only if more precise control
+is needed should the programmer set the ``service_lines`` array
+explicitly.
+
+The :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl modifies the parameters
+according to hardware capabilities. When the driver allocates resources
+at this point, it may return an ``EBUSY`` error code if the required
+resources are temporarily unavailable. Other resource allocation points
+which may return ``EBUSY`` can be the
+:ref:`VIDIOC_STREAMON` ioctl and the first
+:c:func:`read()`, :c:func:`write()` and
+:c:func:`select()` call.
+
+.. c:type:: v4l2_sliced_vbi_format
+
+struct v4l2_sliced_vbi_format
+-----------------------------
+
+.. raw:: latex
+
+    \begingroup
+    \scriptsize
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{.85cm}|p{3.3cm}|p{4.4cm}|p{4.4cm}|p{4.4cm}|
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 3 2 2 2
+
+    * - __u16
+      - ``service_set``
+      - :cspan:`2`
+
+	If ``service_set`` is non-zero when passed with
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` or
+	:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>`, the ``service_lines``
+	array will be filled by the driver according to the services
+	specified in this field. For example, if ``service_set`` is
+	initialized with ``V4L2_SLICED_TELETEXT_B | V4L2_SLICED_WSS_625``,
+	a driver for the cx25840 video decoder sets lines 7-22 of both
+	fields [#f1]_ to ``V4L2_SLICED_TELETEXT_B`` and line 23 of the first
+	field to ``V4L2_SLICED_WSS_625``. If ``service_set`` is set to
+	zero, then the values of ``service_lines`` will be used instead.
+
+	On return the driver sets this field to the union of all elements
+	of the returned ``service_lines`` array. It may contain less
+	services than requested, perhaps just one, if the hardware cannot
+	handle more services simultaneously. It may be empty (zero) if
+	none of the requested services are supported by the hardware.
+    * - __u16
+      - ``service_lines``\ [2][24]
+      - :cspan:`2`
+
+	Applications initialize this array with sets of data services the
+	driver shall look for or insert on the respective scan line.
+	Subject to hardware capabilities drivers return the requested set,
+	a subset, which may be just a single service, or an empty set.
+	When the hardware cannot handle multiple services on the same line
+	the driver shall choose one. No assumptions can be made on which
+	service the driver chooses.
+
+	Data services are defined in :ref:`vbi-services2`. Array indices
+	map to ITU-R line numbers\ [#f2]_ as follows:
+    * -
+      -
+      - Element
+      - 525 line systems
+      - 625 line systems
+    * -
+      -
+      - ``service_lines``\ [0][1]
+      - 1
+      - 1
+    * -
+      -
+      - ``service_lines``\ [0][23]
+      - 23
+      - 23
+    * -
+      -
+      - ``service_lines``\ [1][1]
+      - 264
+      - 314
+    * -
+      -
+      - ``service_lines``\ [1][23]
+      - 286
+      - 336
+    * -
+      -
+      - :cspan:`2` Drivers must set ``service_lines`` [0][0] and
+	``service_lines``\ [1][0] to zero. The
+	``V4L2_VBI_ITU_525_F1_START``, ``V4L2_VBI_ITU_525_F2_START``,
+	``V4L2_VBI_ITU_625_F1_START`` and ``V4L2_VBI_ITU_625_F2_START``
+	defines give the start line numbers for each field for each 525 or
+	625 line format as a convenience. Don't forget that ITU line
+	numbering starts at 1, not 0.
+    * - __u32
+      - ``io_size``
+      - :cspan:`2` Maximum number of bytes passed by one
+	:c:func:`read()` or :c:func:`write()` call,
+	and the buffer size in bytes for the
+	:ref:`VIDIOC_QBUF` and
+	:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. Drivers set this field
+	to the size of struct
+	:c:type:`v4l2_sliced_vbi_data` times the
+	number of non-zero elements in the returned ``service_lines``
+	array (that is the number of lines potentially carrying data).
+    * - __u32
+      - ``reserved``\ [2]
+      - :cspan:`2` This array is reserved for future extensions.
+
+	Applications and drivers must set it to zero.
+
+.. raw:: latex
+
+    \endgroup
+
+.. _vbi-services2:
+
+Sliced VBI services
+-------------------
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{4.1cm}|p{1.1cm}|p{2.4cm}|p{2.0cm}|p{7.3cm}|
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       2 1 1 2 2
+
+    * - Symbol
+      - Value
+      - Reference
+      - Lines, usually
+      - Payload
+    * - ``V4L2_SLICED_TELETEXT_B`` (Teletext System B)
+      - 0x0001
+      - :ref:`ets300706`,
+
+	:ref:`itu653`
+      - PAL/SECAM line 7-22, 320-335 (second field 7-22)
+      - Last 42 of the 45 byte Teletext packet, that is without clock
+	run-in and framing code, lsb first transmitted.
+    * - ``V4L2_SLICED_VPS``
+      - 0x0400
+      - :ref:`ets300231`
+      - PAL line 16
+      - Byte number 3 to 15 according to Figure 9 of ETS 300 231, lsb
+	first transmitted.
+    * - ``V4L2_SLICED_CAPTION_525``
+      - 0x1000
+      - :ref:`cea608`
+      - NTSC line 21, 284 (second field 21)
+      - Two bytes in transmission order, including parity bit, lsb first
+	transmitted.
+    * - ``V4L2_SLICED_WSS_625``
+      - 0x4000
+      - :ref:`itu1119`,
+
+	:ref:`en300294`
+      - PAL/SECAM line 23
+      -
+
+	::
+
+	    Byte         0                 1
+		  msb         lsb  msb           lsb
+	     Bit  7 6 5 4 3 2 1 0  x x 13 12 11 10 9
+    * - ``V4L2_SLICED_VBI_525``
+      - 0x1000
+      - :cspan:`2` Set of services applicable to 525 line systems.
+    * - ``V4L2_SLICED_VBI_625``
+      - 0x4401
+      - :cspan:`2` Set of services applicable to 625 line systems.
+
+.. raw:: latex
+
+    \normalsize
+
+Drivers may return an ``EINVAL`` error code when applications attempt to
+read or write data without prior format negotiation, after switching the
+video standard (which may invalidate the negotiated VBI parameters) and
+after switching the video input (which may change the video standard as
+a side effect). The :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl may
+return an ``EBUSY`` error code when applications attempt to change the
+format while i/o is in progress (between a
+:ref:`VIDIOC_STREAMON` and
+:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` call, and after the first
+:c:func:`read()` or :c:func:`write()` call).
+
+Reading and writing sliced VBI data
+===================================
+
+A single :c:func:`read()` or :c:func:`write()`
+call must pass all data belonging to one video frame. That is an array
+of struct :c:type:`v4l2_sliced_vbi_data` structures with one or
+more elements and a total size not exceeding ``io_size`` bytes. Likewise
+in streaming I/O mode one buffer of ``io_size`` bytes must contain data
+of one video frame. The ``id`` of unused
+struct :c:type:`v4l2_sliced_vbi_data` elements must be zero.
+
+.. c:type:: v4l2_sliced_vbi_data
+
+struct v4l2_sliced_vbi_data
+---------------------------
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - __u32
+      - ``id``
+      - A flag from :ref:`vbi-services` identifying the type of data in
+	this packet. Only a single bit must be set. When the ``id`` of a
+	captured packet is zero, the packet is empty and the contents of
+	other fields are undefined. Applications shall ignore empty
+	packets. When the ``id`` of a packet for output is zero the
+	contents of the ``data`` field are undefined and the driver must
+	no longer insert data on the requested ``field`` and ``line``.
+    * - __u32
+      - ``field``
+      - The video field number this data has been captured from, or shall
+	be inserted at. ``0`` for the first field, ``1`` for the second
+	field.
+    * - __u32
+      - ``line``
+      - The field (as opposed to frame) line number this data has been
+	captured from, or shall be inserted at. See :ref:`vbi-525` and
+	:ref:`vbi-625` for valid values. Sliced VBI capture devices can
+	set the line number of all packets to ``0`` if the hardware cannot
+	reliably identify scan lines. The field number must always be
+	valid.
+    * - __u32
+      - ``reserved``
+      - This field is reserved for future extensions. Applications and
+	drivers must set it to zero.
+    * - __u8
+      - ``data``\ [48]
+      - The packet payload. See :ref:`vbi-services` for the contents and
+	number of bytes passed for each data type. The contents of padding
+	bytes at the end of this array are undefined, drivers and
+	applications shall ignore them.
+
+Packets are always passed in ascending line number order, without
+duplicate line numbers. The :c:func:`write()` function and
+the :ref:`VIDIOC_QBUF` ioctl must return an ``EINVAL``
+error code when applications violate this rule. They must also return an
+EINVAL error code when applications pass an incorrect field or line
+number, or a combination of ``field``, ``line`` and ``id`` which has not
+been negotiated with the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` or
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. When the line numbers are
+unknown the driver must pass the packets in transmitted order. The
+driver can insert empty packets with ``id`` set to zero anywhere in the
+packet array.
+
+To assure synchronization and to distinguish from frame dropping, when a
+captured frame does not carry any of the requested data services drivers
+must pass one or more empty packets. When an application fails to pass
+VBI data in time for output, the driver must output the last VPS and WSS
+packet again, and disable the output of Closed Caption and Teletext
+data, or output data which is ignored by Closed Caption and Teletext
+decoders.
+
+A sliced VBI device may support :ref:`read/write <rw>` and/or
+streaming (:ref:`memory mapping <mmap>` and/or
+:ref:`user pointer <userp>`) I/O. The latter bears the possibility of
+synchronizing video and VBI data by using buffer timestamps.
+
+Sliced VBI Data in MPEG Streams
+===============================
+
+If a device can produce an MPEG output stream, it may be capable of
+providing
+:ref:`negotiated sliced VBI services <sliced-vbi-format-negotitation>`
+as data embedded in the MPEG stream. Users or applications control this
+sliced VBI data insertion with the
+:ref:`V4L2_CID_MPEG_STREAM_VBI_FMT <v4l2-mpeg-stream-vbi-fmt>`
+control.
+
+If the driver does not provide the
+:ref:`V4L2_CID_MPEG_STREAM_VBI_FMT <v4l2-mpeg-stream-vbi-fmt>`
+control, or only allows that control to be set to
+:ref:`V4L2_MPEG_STREAM_VBI_FMT_NONE <v4l2-mpeg-stream-vbi-fmt>`,
+then the device cannot embed sliced VBI data in the MPEG stream.
+
+The
+:ref:`V4L2_CID_MPEG_STREAM_VBI_FMT <v4l2-mpeg-stream-vbi-fmt>`
+control does not implicitly set the device driver to capture nor cease
+capturing sliced VBI data. The control only indicates to embed sliced
+VBI data in the MPEG stream, if an application has negotiated sliced VBI
+service be captured.
+
+It may also be the case that a device can embed sliced VBI data in only
+certain types of MPEG streams: for example in an MPEG-2 PS but not an
+MPEG-2 TS. In this situation, if sliced VBI data insertion is requested,
+the sliced VBI data will be embedded in MPEG stream types when
+supported, and silently omitted from MPEG stream types where sliced VBI
+data insertion is not supported by the device.
+
+The following subsections specify the format of the embedded sliced VBI
+data.
+
+MPEG Stream Embedded, Sliced VBI Data Format: NONE
+--------------------------------------------------
+
+The
+:ref:`V4L2_MPEG_STREAM_VBI_FMT_NONE <v4l2-mpeg-stream-vbi-fmt>`
+embedded sliced VBI format shall be interpreted by drivers as a control
+to cease embedding sliced VBI data in MPEG streams. Neither the device
+nor driver shall insert "empty" embedded sliced VBI data packets in the
+MPEG stream when this format is set. No MPEG stream data structures are
+specified for this format.
+
+MPEG Stream Embedded, Sliced VBI Data Format: IVTV
+--------------------------------------------------
+
+The
+:ref:`V4L2_MPEG_STREAM_VBI_FMT_IVTV <v4l2-mpeg-stream-vbi-fmt>`
+embedded sliced VBI format, when supported, indicates to the driver to
+embed up to 36 lines of sliced VBI data per frame in an MPEG-2 *Private
+Stream 1 PES* packet encapsulated in an MPEG-2 *Program Pack* in the
+MPEG stream.
+
+*Historical context*: This format specification originates from a
+custom, embedded, sliced VBI data format used by the ``ivtv`` driver.
+This format has already been informally specified in the kernel sources
+in the file ``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst`` . The
+maximum size of the payload and other aspects of this format are driven
+by the CX23415 MPEG decoder's capabilities and limitations with respect
+to extracting, decoding, and displaying sliced VBI data embedded within
+an MPEG stream.
+
+This format's use is *not* exclusive to the ``ivtv`` driver *nor*
+exclusive to CX2341x devices, as the sliced VBI data packet insertion
+into the MPEG stream is implemented in driver software. At least the
+``cx18`` driver provides sliced VBI data insertion into an MPEG-2 PS in
+this format as well.
+
+The following definitions specify the payload of the MPEG-2 *Private
+Stream 1 PES* packets that contain sliced VBI data when
+:ref:`V4L2_MPEG_STREAM_VBI_FMT_IVTV <v4l2-mpeg-stream-vbi-fmt>`
+is set. (The MPEG-2 *Private Stream 1 PES* packet header and
+encapsulating MPEG-2 *Program Pack* header are not detailed here. Please
+refer to the MPEG-2 specifications for details on those packet headers.)
+
+The payload of the MPEG-2 *Private Stream 1 PES* packets that contain
+sliced VBI data is specified by struct
+:c:type:`v4l2_mpeg_vbi_fmt_ivtv`. The
+payload is variable length, depending on the actual number of lines of
+sliced VBI data present in a video frame. The payload may be padded at
+the end with unspecified fill bytes to align the end of the payload to a
+4-byte boundary. The payload shall never exceed 1552 bytes (2 fields
+with 18 lines/field with 43 bytes of data/line and a 4 byte magic
+number).
+
+.. c:type:: v4l2_mpeg_vbi_fmt_ivtv
+
+struct v4l2_mpeg_vbi_fmt_ivtv
+-----------------------------
+
+.. tabularcolumns:: |p{1.0cm}|p{3.8cm}|p{1.0cm}|p{11.2cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``magic``\ [4]
+      - A "magic" constant from :ref:`v4l2-mpeg-vbi-fmt-ivtv-magic` that
+	indicates this is a valid sliced VBI data payload and also
+	indicates which member of the anonymous union, ``itv0`` or
+	``ITV0``, to use for the payload data.
+    * - union {
+      - (anonymous)
+    * - struct :c:type:`v4l2_mpeg_vbi_itv0`
+      - ``itv0``
+      - The primary form of the sliced VBI data payload that contains
+	anywhere from 1 to 35 lines of sliced VBI data. Line masks are
+	provided in this form of the payload indicating which VBI lines
+	are provided.
+    * - struct :ref:`v4l2_mpeg_vbi_ITV0 <v4l2-mpeg-vbi-itv0-1>`
+      - ``ITV0``
+      - An alternate form of the sliced VBI data payload used when 36
+	lines of sliced VBI data are present. No line masks are provided
+	in this form of the payload; all valid line mask bits are
+	implcitly set.
+    * - }
+      -
+
+.. _v4l2-mpeg-vbi-fmt-ivtv-magic:
+
+Magic Constants for struct v4l2_mpeg_vbi_fmt_ivtv magic field
+-------------------------------------------------------------
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - Defined Symbol
+      - Value
+      - Description
+    * - ``V4L2_MPEG_VBI_IVTV_MAGIC0``
+      - "itv0"
+      - Indicates the ``itv0`` member of the union in struct
+	:c:type:`v4l2_mpeg_vbi_fmt_ivtv` is
+	valid.
+    * - ``V4L2_MPEG_VBI_IVTV_MAGIC1``
+      - "ITV0"
+      - Indicates the ``ITV0`` member of the union in struct
+	:c:type:`v4l2_mpeg_vbi_fmt_ivtv` is
+	valid and that 36 lines of sliced VBI data are present.
+
+
+.. c:type:: v4l2_mpeg_vbi_itv0
+
+.. c:type:: v4l2_mpeg_vbi_ITV0
+
+structs v4l2_mpeg_vbi_itv0 and v4l2_mpeg_vbi_ITV0
+-------------------------------------------------
+
+.. tabularcolumns:: |p{5.2cm}|p{2.4cm}|p{9.9cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __le32
+      - ``linemask``\ [2]
+      - Bitmasks indicating the VBI service lines present. These
+	``linemask`` values are stored in little endian byte order in the
+	MPEG stream. Some reference ``linemask`` bit positions with their
+	corresponding VBI line number and video field are given below.
+	b\ :sub:`0` indicates the least significant bit of a ``linemask``
+	value:
+
+
+	::
+
+	    linemask[0] b0:     line  6  first field
+	    linemask[0] b17:    line 23  first field
+	    linemask[0] b18:    line  6  second field
+	    linemask[0] b31:    line 19  second field
+	    linemask[1] b0:     line 20  second field
+	    linemask[1] b3:     line 23  second field
+	    linemask[1] b4-b31: unused and set to 0
+    * - struct
+	:c:type:`v4l2_mpeg_vbi_itv0_line`
+      - ``line``\ [35]
+      - This is a variable length array that holds from 1 to 35 lines of
+	sliced VBI data. The sliced VBI data lines present correspond to
+	the bits set in the ``linemask`` array, starting from b\ :sub:`0`
+	of ``linemask``\ [0] up through b\ :sub:`31` of ``linemask``\ [0],
+	and from b\ :sub:`0` of ``linemask``\ [1] up through b\ :sub:`3` of
+	``linemask``\ [1]. ``line``\ [0] corresponds to the first bit
+	found set in the ``linemask`` array, ``line``\ [1] corresponds to
+	the second bit found set in the ``linemask`` array, etc. If no
+	``linemask`` array bits are set, then ``line``\ [0] may contain
+	one line of unspecified data that should be ignored by
+	applications.
+
+
+.. _v4l2-mpeg-vbi-itv0-1:
+
+struct v4l2_mpeg_vbi_ITV0
+-------------------------
+
+.. tabularcolumns:: |p{5.2cm}|p{2.4cm}|p{9.9cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - struct
+	:c:type:`v4l2_mpeg_vbi_itv0_line`
+      - ``line``\ [36]
+      - A fixed length array of 36 lines of sliced VBI data. ``line``\ [0]
+	through ``line``\ [17] correspond to lines 6 through 23 of the
+	first field. ``line``\ [18] through ``line``\ [35] corresponds to
+	lines 6 through 23 of the second field.
+
+
+.. c:type:: v4l2_mpeg_vbi_itv0_line
+
+struct v4l2_mpeg_vbi_itv0_line
+------------------------------
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``id``
+      - A line identifier value from
+	:ref:`ITV0-Line-Identifier-Constants` that indicates the type of
+	sliced VBI data stored on this line.
+    * - __u8
+      - ``data``\ [42]
+      - The sliced VBI data for the line.
+
+
+.. _ITV0-Line-Identifier-Constants:
+
+Line Identifiers for struct v4l2_mpeg_vbi_itv0_line id field
+------------------------------------------------------------
+
+.. tabularcolumns:: |p{7.0cm}|p{1.8cm}|p{8.7cm}|
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - Defined Symbol
+      - Value
+      - Description
+    * - ``V4L2_MPEG_VBI_IVTV_TELETEXT_B``
+      - 1
+      - Refer to :ref:`Sliced VBI services <vbi-services2>` for a
+	description of the line payload.
+    * - ``V4L2_MPEG_VBI_IVTV_CAPTION_525``
+      - 4
+      - Refer to :ref:`Sliced VBI services <vbi-services2>` for a
+	description of the line payload.
+    * - ``V4L2_MPEG_VBI_IVTV_WSS_625``
+      - 5
+      - Refer to :ref:`Sliced VBI services <vbi-services2>` for a
+	description of the line payload.
+    * - ``V4L2_MPEG_VBI_IVTV_VPS``
+      - 7
+      - Refer to :ref:`Sliced VBI services <vbi-services2>` for a
+	description of the line payload.
+
+
+.. [#f1]
+   According to :ref:`ETS 300 706 <ets300706>` lines 6-22 of the first
+   field and lines 5-22 of the second field may carry Teletext data.
+
+.. [#f2]
+   See also :ref:`vbi-525` and :ref:`vbi-625`.
diff --git a/Documentation/userspace-api/media/v4l/dev-stateless-decoder.rst b/Documentation/userspace-api/media/v4l/dev-stateless-decoder.rst
new file mode 100644
index 000000000..4a26646ee
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-stateless-decoder.rst
@@ -0,0 +1,424 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. _stateless_decoder:
+
+**************************************************
+Memory-to-memory Stateless Video Decoder Interface
+**************************************************
+
+A stateless decoder is a decoder that works without retaining any kind of state
+between processed frames. This means that each frame is decoded independently
+of any previous and future frames, and that the client is responsible for
+maintaining the decoding state and providing it to the decoder with each
+decoding request. This is in contrast to the stateful video decoder interface,
+where the hardware and driver maintain the decoding state and all the client
+has to do is to provide the raw encoded stream and dequeue decoded frames in
+display order.
+
+This section describes how user-space ("the client") is expected to communicate
+with stateless decoders in order to successfully decode an encoded stream.
+Compared to stateful codecs, the decoder/client sequence is simpler, but the
+cost of this simplicity is extra complexity in the client which is responsible
+for maintaining a consistent decoding state.
+
+Stateless decoders make use of the :ref:`media-request-api`. A stateless
+decoder must expose the ``V4L2_BUF_CAP_SUPPORTS_REQUESTS`` capability on its
+``OUTPUT`` queue when :c:func:`VIDIOC_REQBUFS` or :c:func:`VIDIOC_CREATE_BUFS`
+are invoked.
+
+Depending on the encoded formats supported by the decoder, a single decoded
+frame may be the result of several decode requests (for instance, H.264 streams
+with multiple slices per frame). Decoders that support such formats must also
+expose the ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` capability on their
+``OUTPUT`` queue.
+
+Querying capabilities
+=====================
+
+1. To enumerate the set of coded formats supported by the decoder, the client
+   calls :c:func:`VIDIOC_ENUM_FMT` on the ``OUTPUT`` queue.
+
+   * The driver must always return the full set of supported ``OUTPUT`` formats,
+     irrespective of the format currently set on the ``CAPTURE`` queue.
+
+   * Simultaneously, the driver must restrain the set of values returned by
+     codec-specific capability controls (such as H.264 profiles) to the set
+     actually supported by the hardware.
+
+2. To enumerate the set of supported raw formats, the client calls
+   :c:func:`VIDIOC_ENUM_FMT` on the ``CAPTURE`` queue.
+
+   * The driver must return only the formats supported for the format currently
+     active on the ``OUTPUT`` queue.
+
+   * Depending on the currently set ``OUTPUT`` format, the set of supported raw
+     formats may depend on the value of some codec-dependent controls.
+     The client is responsible for making sure that these controls are set
+     before querying the ``CAPTURE`` queue. Failure to do so will result in the
+     default values for these controls being used, and a returned set of formats
+     that may not be usable for the media the client is trying to decode.
+
+3. The client may use :c:func:`VIDIOC_ENUM_FRAMESIZES` to detect supported
+   resolutions for a given format, passing desired pixel format in
+   :c:type:`v4l2_frmsizeenum`'s ``pixel_format``.
+
+4. Supported profiles and levels for the current ``OUTPUT`` format, if
+   applicable, may be queried using their respective controls via
+   :c:func:`VIDIOC_QUERYCTRL`.
+
+Initialization
+==============
+
+1. Set the coded format on the ``OUTPUT`` queue via :c:func:`VIDIOC_S_FMT`.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+     ``pixelformat``
+         a coded pixel format.
+
+     ``width``, ``height``
+         coded width and height parsed from the stream.
+
+     other fields
+         follow standard semantics.
+
+   .. note::
+
+      Changing the ``OUTPUT`` format may change the currently set ``CAPTURE``
+      format. The driver will derive a new ``CAPTURE`` format from the
+      ``OUTPUT`` format being set, including resolution, colorimetry
+      parameters, etc. If the client needs a specific ``CAPTURE`` format,
+      it must adjust it afterwards.
+
+2. Call :c:func:`VIDIOC_S_EXT_CTRLS` to set all the controls (parsed headers,
+   etc.) required by the ``OUTPUT`` format to enumerate the ``CAPTURE`` formats.
+
+3. Call :c:func:`VIDIOC_G_FMT` for ``CAPTURE`` queue to get the format for the
+   destination buffers parsed/decoded from the bytestream.
+
+   * **Required fields:**
+
+     ``type``
+         a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+   * **Returned fields:**
+
+     ``width``, ``height``
+         frame buffer resolution for the decoded frames.
+
+     ``pixelformat``
+         pixel format for decoded frames.
+
+     ``num_planes`` (for _MPLANE ``type`` only)
+         number of planes for pixelformat.
+
+     ``sizeimage``, ``bytesperline``
+         as per standard semantics; matching frame buffer format.
+
+   .. note::
+
+      The value of ``pixelformat`` may be any pixel format supported for the
+      ``OUTPUT`` format, based on the hardware capabilities. It is suggested
+      that the driver chooses the preferred/optimal format for the current
+      configuration. For example, a YUV format may be preferred over an RGB
+      format, if an additional conversion step would be required for RGB.
+
+4. *[optional]* Enumerate ``CAPTURE`` formats via :c:func:`VIDIOC_ENUM_FMT` on
+   the ``CAPTURE`` queue. The client may use this ioctl to discover which
+   alternative raw formats are supported for the current ``OUTPUT`` format and
+   select one of them via :c:func:`VIDIOC_S_FMT`.
+
+   .. note::
+
+      The driver will return only formats supported for the currently selected
+      ``OUTPUT`` format and currently set controls, even if more formats may be
+      supported by the decoder in general.
+
+      For example, a decoder may support YUV and RGB formats for
+      resolutions 1920x1088 and lower, but only YUV for higher resolutions (due
+      to hardware limitations). After setting a resolution of 1920x1088 or lower
+      as the ``OUTPUT`` format, :c:func:`VIDIOC_ENUM_FMT` may return a set of
+      YUV and RGB pixel formats, but after setting a resolution higher than
+      1920x1088, the driver will not return RGB pixel formats, since they are
+      unsupported for this resolution.
+
+5. *[optional]* Choose a different ``CAPTURE`` format than suggested via
+   :c:func:`VIDIOC_S_FMT` on ``CAPTURE`` queue. It is possible for the client to
+   choose a different format than selected/suggested by the driver in
+   :c:func:`VIDIOC_G_FMT`.
+
+    * **Required fields:**
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+      ``pixelformat``
+          a raw pixel format.
+
+      ``width``, ``height``
+         frame buffer resolution of the decoded stream; typically unchanged from
+         what was returned with :c:func:`VIDIOC_G_FMT`, but it may be different
+         if the hardware supports composition and/or scaling.
+
+   After performing this step, the client must perform step 3 again in order
+   to obtain up-to-date information about the buffers size and layout.
+
+6. Allocate source (bytestream) buffers via :c:func:`VIDIOC_REQBUFS` on
+   ``OUTPUT`` queue.
+
+    * **Required fields:**
+
+      ``count``
+          requested number of buffers to allocate; greater than zero.
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
+
+      ``memory``
+          follows standard semantics.
+
+    * **Return fields:**
+
+      ``count``
+          actual number of buffers allocated.
+
+    * If required, the driver will adjust ``count`` to be equal or bigger to the
+      minimum of required number of ``OUTPUT`` buffers for the given format and
+      requested count. The client must check this value after the ioctl returns
+      to get the actual number of buffers allocated.
+
+7. Allocate destination (raw format) buffers via :c:func:`VIDIOC_REQBUFS` on the
+   ``CAPTURE`` queue.
+
+    * **Required fields:**
+
+      ``count``
+          requested number of buffers to allocate; greater than zero. The client
+          is responsible for deducing the minimum number of buffers required
+          for the stream to be properly decoded (taking e.g. reference frames
+          into account) and pass an equal or bigger number.
+
+      ``type``
+          a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``.
+
+      ``memory``
+          follows standard semantics. ``V4L2_MEMORY_USERPTR`` is not supported
+          for ``CAPTURE`` buffers.
+
+    * **Return fields:**
+
+      ``count``
+          adjusted to allocated number of buffers, in case the codec requires
+          more buffers than requested.
+
+    * The driver must adjust count to the minimum of required number of
+      ``CAPTURE`` buffers for the current format, stream configuration and
+      requested count. The client must check this value after the ioctl
+      returns to get the number of buffers allocated.
+
+8. Allocate requests (likely one per ``OUTPUT`` buffer) via
+    :c:func:`MEDIA_IOC_REQUEST_ALLOC` on the media device.
+
+9. Start streaming on both ``OUTPUT`` and ``CAPTURE`` queues via
+    :c:func:`VIDIOC_STREAMON`.
+
+Decoding
+========
+
+For each frame, the client is responsible for submitting at least one request to
+which the following is attached:
+
+* The amount of encoded data expected by the codec for its current
+  configuration, as a buffer submitted to the ``OUTPUT`` queue. Typically, this
+  corresponds to one frame worth of encoded data, but some formats may allow (or
+  require) different amounts per unit.
+* All the metadata needed to decode the submitted encoded data, in the form of
+  controls relevant to the format being decoded.
+
+The amount of data and contents of the source ``OUTPUT`` buffer, as well as the
+controls that must be set on the request, depend on the active coded pixel
+format and might be affected by codec-specific extended controls, as stated in
+documentation of each format.
+
+If there is a possibility that the decoded frame will require one or more
+decode requests after the current one in order to be produced, then the client
+must set the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag on the ``OUTPUT``
+buffer. This will result in the (potentially partially) decoded ``CAPTURE``
+buffer not being made available for dequeueing, and reused for the next decode
+request if the timestamp of the next ``OUTPUT`` buffer has not changed.
+
+A typical frame would thus be decoded using the following sequence:
+
+1. Queue an ``OUTPUT`` buffer containing one unit of encoded bytestream data for
+   the decoding request, using :c:func:`VIDIOC_QBUF`.
+
+    * **Required fields:**
+
+      ``index``
+          index of the buffer being queued.
+
+      ``type``
+          type of the buffer.
+
+      ``bytesused``
+          number of bytes taken by the encoded data frame in the buffer.
+
+      ``flags``
+          the ``V4L2_BUF_FLAG_REQUEST_FD`` flag must be set. Additionally, if
+          we are not sure that the current decode request is the last one needed
+          to produce a fully decoded frame, then
+          ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` must also be set.
+
+      ``request_fd``
+          must be set to the file descriptor of the decoding request.
+
+      ``timestamp``
+          must be set to a unique value per frame. This value will be propagated
+          into the decoded frame's buffer and can also be used to use this frame
+          as the reference of another. If using multiple decode requests per
+          frame, then the timestamps of all the ``OUTPUT`` buffers for a given
+          frame must be identical. If the timestamp changes, then the currently
+          held ``CAPTURE`` buffer will be made available for dequeuing and the
+          current request will work on a new ``CAPTURE`` buffer.
+
+2. Set the codec-specific controls for the decoding request, using
+   :c:func:`VIDIOC_S_EXT_CTRLS`.
+
+    * **Required fields:**
+
+      ``which``
+          must be ``V4L2_CTRL_WHICH_REQUEST_VAL``.
+
+      ``request_fd``
+          must be set to the file descriptor of the decoding request.
+
+      other fields
+          other fields are set as usual when setting controls. The ``controls``
+          array must contain all the codec-specific controls required to decode
+          a frame.
+
+   .. note::
+
+      It is possible to specify the controls in different invocations of
+      :c:func:`VIDIOC_S_EXT_CTRLS`, or to overwrite a previously set control, as
+      long as ``request_fd`` and ``which`` are properly set. The controls state
+      at the moment of request submission is the one that will be considered.
+
+   .. note::
+
+      The order in which steps 1 and 2 take place is interchangeable.
+
+3. Submit the request by invoking :c:func:`MEDIA_REQUEST_IOC_QUEUE` on the
+   request FD.
+
+    If the request is submitted without an ``OUTPUT`` buffer, or if some of the
+    required controls are missing from the request, then
+    :c:func:`MEDIA_REQUEST_IOC_QUEUE` will return ``-ENOENT``. If more than one
+    ``OUTPUT`` buffer is queued, then it will return ``-EINVAL``.
+    :c:func:`MEDIA_REQUEST_IOC_QUEUE` returning non-zero means that no
+    ``CAPTURE`` buffer will be produced for this request.
+
+``CAPTURE`` buffers must not be part of the request, and are queued
+independently. They are returned in decode order (i.e. the same order as coded
+frames were submitted to the ``OUTPUT`` queue).
+
+Runtime decoding errors are signaled by the dequeued ``CAPTURE`` buffers
+carrying the ``V4L2_BUF_FLAG_ERROR`` flag. If a decoded reference frame has an
+error, then all following decoded frames that refer to it also have the
+``V4L2_BUF_FLAG_ERROR`` flag set, although the decoder will still try to
+produce (likely corrupted) frames.
+
+Buffer management while decoding
+================================
+Contrary to stateful decoders, a stateless decoder does not perform any kind of
+buffer management: it only guarantees that dequeued ``CAPTURE`` buffers can be
+used by the client for as long as they are not queued again. "Used" here
+encompasses using the buffer for compositing or display.
+
+A dequeued capture buffer can also be used as the reference frame of another
+buffer.
+
+A frame is specified as reference by converting its timestamp into nanoseconds,
+and storing it into the relevant member of a codec-dependent control structure.
+The :c:func:`v4l2_timeval_to_ns` function must be used to perform that
+conversion. The timestamp of a frame can be used to reference it as soon as all
+its units of encoded data are successfully submitted to the ``OUTPUT`` queue.
+
+A decoded buffer containing a reference frame must not be reused as a decoding
+target until all the frames referencing it have been decoded. The safest way to
+achieve this is to refrain from queueing a reference buffer until all the
+decoded frames referencing it have been dequeued. However, if the driver can
+guarantee that buffers queued to the ``CAPTURE`` queue are processed in queued
+order, then user-space can take advantage of this guarantee and queue a
+reference buffer when the following conditions are met:
+
+1. All the requests for frames affected by the reference frame have been
+   queued, and
+
+2. A sufficient number of ``CAPTURE`` buffers to cover all the decoded
+   referencing frames have been queued.
+
+When queuing a decoding request, the driver will increase the reference count of
+all the resources associated with reference frames. This means that the client
+can e.g. close the DMABUF file descriptors of reference frame buffers if it
+won't need them afterwards.
+
+Seeking
+=======
+In order to seek, the client just needs to submit requests using input buffers
+corresponding to the new stream position. It must however be aware that
+resolution may have changed and follow the dynamic resolution change sequence in
+that case. Also depending on the codec used, picture parameters (e.g. SPS/PPS
+for H.264) may have changed and the client is responsible for making sure that a
+valid state is sent to the decoder.
+
+The client is then free to ignore any returned ``CAPTURE`` buffer that comes
+from the pre-seek position.
+
+Pausing
+=======
+
+In order to pause, the client can just cease queuing buffers onto the ``OUTPUT``
+queue. Without source bytestream data, there is no data to process and the codec
+will remain idle.
+
+Dynamic resolution change
+=========================
+
+If the client detects a resolution change in the stream, it will need to perform
+the initialization sequence again with the new resolution:
+
+1. If the last submitted request resulted in a ``CAPTURE`` buffer being
+   held by the use of the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag, then the
+   last frame is not available on the ``CAPTURE`` queue. In this case, a
+   ``V4L2_DEC_CMD_FLUSH`` command shall be sent. This will make the driver
+   dequeue the held ``CAPTURE`` buffer.
+
+2. Wait until all submitted requests have completed and dequeue the
+   corresponding output buffers.
+
+3. Call :c:func:`VIDIOC_STREAMOFF` on both the ``OUTPUT`` and ``CAPTURE``
+   queues.
+
+4. Free all ``CAPTURE`` buffers by calling :c:func:`VIDIOC_REQBUFS` on the
+   ``CAPTURE`` queue with a buffer count of zero.
+
+5. Perform the initialization sequence again (minus the allocation of
+   ``OUTPUT`` buffers), with the new resolution set on the ``OUTPUT`` queue.
+   Note that due to resolution constraints, a different format may need to be
+   picked on the ``CAPTURE`` queue.
+
+Drain
+=====
+
+If the last submitted request resulted in a ``CAPTURE`` buffer being
+held by the use of the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag, then the
+last frame is not available on the ``CAPTURE`` queue. In this case, a
+``V4L2_DEC_CMD_FLUSH`` command shall be sent. This will make the driver
+dequeue the held ``CAPTURE`` buffer.
+
+After that, in order to drain the stream on a stateless decoder, the client
+just needs to wait until all the submitted requests are completed.
diff --git a/Documentation/userspace-api/media/v4l/dev-subdev.rst b/Documentation/userspace-api/media/v4l/dev-subdev.rst
new file mode 100644
index 000000000..2aa8157ef
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-subdev.rst
@@ -0,0 +1,501 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _subdev:
+
+********************
+Sub-device Interface
+********************
+
+The complex nature of V4L2 devices, where hardware is often made of
+several integrated circuits that need to interact with each other in a
+controlled way, leads to complex V4L2 drivers. The drivers usually
+reflect the hardware model in software, and model the different hardware
+components as software blocks called sub-devices.
+
+V4L2 sub-devices are usually kernel-only objects. If the V4L2 driver
+implements the media device API, they will automatically inherit from
+media entities. Applications will be able to enumerate the sub-devices
+and discover the hardware topology using the media entities, pads and
+links enumeration API.
+
+In addition to make sub-devices discoverable, drivers can also choose to
+make them directly configurable by applications. When both the
+sub-device driver and the V4L2 device driver support this, sub-devices
+will feature a character device node on which ioctls can be called to
+
+-  query, read and write sub-devices controls
+
+-  subscribe and unsubscribe to events and retrieve them
+
+-  negotiate image formats on individual pads
+
+Sub-device character device nodes, conventionally named
+``/dev/v4l-subdev*``, use major number 81.
+
+Drivers may opt to limit the sub-device character devices to only expose
+operations that do not modify the device state. In such a case the sub-devices
+are referred to as ``read-only`` in the rest of this documentation, and the
+related restrictions are documented in individual ioctls.
+
+
+Controls
+========
+
+Most V4L2 controls are implemented by sub-device hardware. Drivers
+usually merge all controls and expose them through video device nodes.
+Applications can control all sub-devices through a single interface.
+
+Complex devices sometimes implement the same control in different pieces
+of hardware. This situation is common in embedded platforms, where both
+sensors and image processing hardware implement identical functions,
+such as contrast adjustment, white balance or faulty pixels correction.
+As the V4L2 controls API doesn't support several identical controls in a
+single device, all but one of the identical controls are hidden.
+
+Applications can access those hidden controls through the sub-device
+node with the V4L2 control API described in :ref:`control`. The ioctls
+behave identically as when issued on V4L2 device nodes, with the
+exception that they deal only with controls implemented in the
+sub-device.
+
+Depending on the driver, those controls might also be exposed through
+one (or several) V4L2 device nodes.
+
+
+Events
+======
+
+V4L2 sub-devices can notify applications of events as described in
+:ref:`event`. The API behaves identically as when used on V4L2 device
+nodes, with the exception that it only deals with events generated by
+the sub-device. Depending on the driver, those events might also be
+reported on one (or several) V4L2 device nodes.
+
+
+.. _pad-level-formats:
+
+Pad-level Formats
+=================
+
+.. warning::
+
+    Pad-level formats are only applicable to very complex devices that
+    need to expose low-level format configuration to user space. Generic
+    V4L2 applications do *not* need to use the API described in this
+    section.
+
+.. note::
+
+    For the purpose of this section, the term *format* means the
+    combination of media bus data format, frame width and frame height.
+
+Image formats are typically negotiated on video capture and output
+devices using the format and
+:ref:`selection <VIDIOC_SUBDEV_G_SELECTION>` ioctls. The driver is
+responsible for configuring every block in the video pipeline according
+to the requested format at the pipeline input and/or output.
+
+For complex devices, such as often found in embedded systems, identical
+image sizes at the output of a pipeline can be achieved using different
+hardware configurations. One such example is shown on
+:ref:`pipeline-scaling`, where image scaling can be performed on both
+the video sensor and the host image processing hardware.
+
+
+.. _pipeline-scaling:
+
+.. kernel-figure:: pipeline.dot
+    :alt:   pipeline.dot
+    :align: center
+
+    Image Format Negotiation on Pipelines
+
+    High quality and high speed pipeline configuration
+
+
+
+The sensor scaler is usually of less quality than the host scaler, but
+scaling on the sensor is required to achieve higher frame rates.
+Depending on the use case (quality vs. speed), the pipeline must be
+configured differently. Applications need to configure the formats at
+every point in the pipeline explicitly.
+
+Drivers that implement the :ref:`media API <media-controller-intro>`
+can expose pad-level image format configuration to applications. When
+they do, applications can use the
+:ref:`VIDIOC_SUBDEV_G_FMT <VIDIOC_SUBDEV_G_FMT>` and
+:ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` ioctls. to
+negotiate formats on a per-pad basis.
+
+Applications are responsible for configuring coherent parameters on the
+whole pipeline and making sure that connected pads have compatible
+formats. The pipeline is checked for formats mismatch at
+:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` time, and an ``EPIPE`` error
+code is then returned if the configuration is invalid.
+
+Pad-level image format configuration support can be tested by calling
+the :ref:`VIDIOC_SUBDEV_G_FMT` ioctl on pad
+0. If the driver returns an ``EINVAL`` error code pad-level format
+configuration is not supported by the sub-device.
+
+
+Format Negotiation
+------------------
+
+Acceptable formats on pads can (and usually do) depend on a number of
+external parameters, such as formats on other pads, active links, or
+even controls. Finding a combination of formats on all pads in a video
+pipeline, acceptable to both application and driver, can't rely on
+formats enumeration only. A format negotiation mechanism is required.
+
+Central to the format negotiation mechanism are the get/set format
+operations. When called with the ``which`` argument set to
+:ref:`V4L2_SUBDEV_FORMAT_TRY <VIDIOC_SUBDEV_G_FMT>`, the
+:ref:`VIDIOC_SUBDEV_G_FMT <VIDIOC_SUBDEV_G_FMT>` and
+:ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` ioctls operate on
+a set of formats parameters that are not connected to the hardware
+configuration. Modifying those 'try' formats leaves the device state
+untouched (this applies to both the software state stored in the driver
+and the hardware state stored in the device itself).
+
+While not kept as part of the device state, try formats are stored in
+the sub-device file handles. A
+:ref:`VIDIOC_SUBDEV_G_FMT <VIDIOC_SUBDEV_G_FMT>` call will return
+the last try format set *on the same sub-device file handle*. Several
+applications querying the same sub-device at the same time will thus not
+interact with each other.
+
+To find out whether a particular format is supported by the device,
+applications use the
+:ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` ioctl. Drivers
+verify and, if needed, change the requested ``format`` based on device
+requirements and return the possibly modified value. Applications can
+then choose to try a different format or accept the returned value and
+continue.
+
+Formats returned by the driver during a negotiation iteration are
+guaranteed to be supported by the device. In particular, drivers
+guarantee that a returned format will not be further changed if passed
+to an :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` call as-is
+(as long as external parameters, such as formats on other pads or links'
+configuration are not changed).
+
+Drivers automatically propagate formats inside sub-devices. When a try
+or active format is set on a pad, corresponding formats on other pads of
+the same sub-device can be modified by the driver. Drivers are free to
+modify formats as required by the device. However, they should comply
+with the following rules when possible:
+
+-  Formats should be propagated from sink pads to source pads. Modifying
+   a format on a source pad should not modify the format on any sink
+   pad.
+
+-  Sub-devices that scale frames using variable scaling factors should
+   reset the scale factors to default values when sink pads formats are
+   modified. If the 1:1 scaling ratio is supported, this means that
+   source pads formats should be reset to the sink pads formats.
+
+Formats are not propagated across links, as that would involve
+propagating them from one sub-device file handle to another.
+Applications must then take care to configure both ends of every link
+explicitly with compatible formats. Identical formats on the two ends of
+a link are guaranteed to be compatible. Drivers are free to accept
+different formats matching device requirements as being compatible.
+
+:ref:`sample-pipeline-config` shows a sample configuration sequence
+for the pipeline described in :ref:`pipeline-scaling` (table columns
+list entity names and pad numbers).
+
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{2.0cm}|p{2.3cm}|p{2.3cm}|p{2.3cm}|p{2.3cm}|p{2.3cm}|p{2.3cm}|
+
+.. _sample-pipeline-config:
+
+.. flat-table:: Sample Pipeline Configuration
+    :header-rows:  1
+    :stub-columns: 0
+    :widths: 5 5 5 5 5 5 5
+
+    * -
+      - Sensor/0
+
+        format
+      - Frontend/0
+
+        format
+      - Frontend/1
+
+        format
+      - Scaler/0
+
+        format
+      - Scaler/0
+
+        compose selection rectangle
+      - Scaler/1
+
+        format
+    * - Initial state
+      - 2048x1536
+
+        SGRBG8_1X8
+      - (default)
+      - (default)
+      - (default)
+      - (default)
+      - (default)
+    * - Configure frontend sink format
+      - 2048x1536
+
+        SGRBG8_1X8
+      - *2048x1536*
+
+        *SGRBG8_1X8*
+      - *2046x1534*
+
+        *SGRBG8_1X8*
+      - (default)
+      - (default)
+      - (default)
+    * - Configure scaler sink format
+      - 2048x1536
+
+        SGRBG8_1X8
+      - 2048x1536
+
+        SGRBG8_1X8
+      - 2046x1534
+
+        SGRBG8_1X8
+      - *2046x1534*
+
+        *SGRBG8_1X8*
+      - *0,0/2046x1534*
+      - *2046x1534*
+
+        *SGRBG8_1X8*
+    * - Configure scaler sink compose selection
+      - 2048x1536
+
+        SGRBG8_1X8
+      - 2048x1536
+
+        SGRBG8_1X8
+      - 2046x1534
+
+        SGRBG8_1X8
+      - 2046x1534
+
+        SGRBG8_1X8
+      - *0,0/1280x960*
+      - *1280x960*
+
+        *SGRBG8_1X8*
+
+.. raw:: latex
+
+    \normalsize
+
+1. Initial state. The sensor source pad format is set to its native 3MP
+   size and V4L2_MBUS_FMT_SGRBG8_1X8 media bus code. Formats on the
+   host frontend and scaler sink and source pads have the default
+   values, as well as the compose rectangle on the scaler's sink pad.
+
+2. The application configures the frontend sink pad format's size to
+   2048x1536 and its media bus code to V4L2_MBUS_FMT_SGRBG_1X8. The
+   driver propagates the format to the frontend source pad.
+
+3. The application configures the scaler sink pad format's size to
+   2046x1534 and the media bus code to V4L2_MBUS_FMT_SGRBG_1X8 to
+   match the frontend source size and media bus code. The media bus code
+   on the sink pad is set to V4L2_MBUS_FMT_SGRBG_1X8. The driver
+   propagates the size to the compose selection rectangle on the
+   scaler's sink pad, and the format to the scaler source pad.
+
+4. The application configures the size of the compose selection
+   rectangle of the scaler's sink pad 1280x960. The driver propagates
+   the size to the scaler's source pad format.
+
+When satisfied with the try results, applications can set the active
+formats by setting the ``which`` argument to
+``V4L2_SUBDEV_FORMAT_ACTIVE``. Active formats are changed exactly as try
+formats by drivers. To avoid modifying the hardware state during format
+negotiation, applications should negotiate try formats first and then
+modify the active settings using the try formats returned during the
+last negotiation iteration. This guarantees that the active format will
+be applied as-is by the driver without being modified.
+
+
+.. _v4l2-subdev-selections:
+
+Selections: cropping, scaling and composition
+---------------------------------------------
+
+Many sub-devices support cropping frames on their input or output pads
+(or possible even on both). Cropping is used to select the area of
+interest in an image, typically on an image sensor or a video decoder.
+It can also be used as part of digital zoom implementations to select
+the area of the image that will be scaled up.
+
+Crop settings are defined by a crop rectangle and represented in a
+struct :c:type:`v4l2_rect` by the coordinates of the top
+left corner and the rectangle size. Both the coordinates and sizes are
+expressed in pixels.
+
+As for pad formats, drivers store try and active rectangles for the
+selection targets :ref:`v4l2-selections-common`.
+
+On sink pads, cropping is applied relative to the current pad format.
+The pad format represents the image size as received by the sub-device
+from the previous block in the pipeline, and the crop rectangle
+represents the sub-image that will be transmitted further inside the
+sub-device for processing.
+
+The scaling operation changes the size of the image by scaling it to new
+dimensions. The scaling ratio isn't specified explicitly, but is implied
+from the original and scaled image sizes. Both sizes are represented by
+struct :c:type:`v4l2_rect`.
+
+Scaling support is optional. When supported by a subdev, the crop
+rectangle on the subdev's sink pad is scaled to the size configured
+using the
+:ref:`VIDIOC_SUBDEV_S_SELECTION <VIDIOC_SUBDEV_G_SELECTION>` IOCTL
+using ``V4L2_SEL_TGT_COMPOSE`` selection target on the same pad. If the
+subdev supports scaling but not composing, the top and left values are
+not used and must always be set to zero.
+
+On source pads, cropping is similar to sink pads, with the exception
+that the source size from which the cropping is performed, is the
+COMPOSE rectangle on the sink pad. In both sink and source pads, the
+crop rectangle must be entirely contained inside the source image size
+for the crop operation.
+
+The drivers should always use the closest possible rectangle the user
+requests on all selection targets, unless specifically told otherwise.
+``V4L2_SEL_FLAG_GE`` and ``V4L2_SEL_FLAG_LE`` flags may be used to round
+the image size either up or down. :ref:`v4l2-selection-flags`
+
+
+Types of selection targets
+--------------------------
+
+
+Actual targets
+^^^^^^^^^^^^^^
+
+Actual targets (without a postfix) reflect the actual hardware
+configuration at any point of time. There is a BOUNDS target
+corresponding to every actual target.
+
+
+BOUNDS targets
+^^^^^^^^^^^^^^
+
+BOUNDS targets is the smallest rectangle that contains all valid actual
+rectangles. It may not be possible to set the actual rectangle as large
+as the BOUNDS rectangle, however. This may be because e.g. a sensor's
+pixel array is not rectangular but cross-shaped or round. The maximum
+size may also be smaller than the BOUNDS rectangle.
+
+
+Order of configuration and format propagation
+---------------------------------------------
+
+Inside subdevs, the order of image processing steps will always be from
+the sink pad towards the source pad. This is also reflected in the order
+in which the configuration must be performed by the user: the changes
+made will be propagated to any subsequent stages. If this behaviour is
+not desired, the user must set ``V4L2_SEL_FLAG_KEEP_CONFIG`` flag. This
+flag causes no propagation of the changes are allowed in any
+circumstances. This may also cause the accessed rectangle to be adjusted
+by the driver, depending on the properties of the underlying hardware.
+
+The coordinates to a step always refer to the actual size of the
+previous step. The exception to this rule is the sink compose
+rectangle, which refers to the sink compose bounds rectangle --- if it
+is supported by the hardware.
+
+1. Sink pad format. The user configures the sink pad format. This format
+   defines the parameters of the image the entity receives through the
+   pad for further processing.
+
+2. Sink pad actual crop selection. The sink pad crop defines the crop
+   performed to the sink pad format.
+
+3. Sink pad actual compose selection. The size of the sink pad compose
+   rectangle defines the scaling ratio compared to the size of the sink
+   pad crop rectangle. The location of the compose rectangle specifies
+   the location of the actual sink compose rectangle in the sink compose
+   bounds rectangle.
+
+4. Source pad actual crop selection. Crop on the source pad defines crop
+   performed to the image in the sink compose bounds rectangle.
+
+5. Source pad format. The source pad format defines the output pixel
+   format of the subdev, as well as the other parameters with the
+   exception of the image width and height. Width and height are defined
+   by the size of the source pad actual crop selection.
+
+Accessing any of the above rectangles not supported by the subdev will
+return ``EINVAL``. Any rectangle referring to a previous unsupported
+rectangle coordinates will instead refer to the previous supported
+rectangle. For example, if sink crop is not supported, the compose
+selection will refer to the sink pad format dimensions instead.
+
+
+.. _subdev-image-processing-crop:
+
+.. kernel-figure:: subdev-image-processing-crop.svg
+    :alt:   subdev-image-processing-crop.svg
+    :align: center
+
+    **Figure 4.5. Image processing in subdevs: simple crop example**
+
+In the above example, the subdev supports cropping on its sink pad. To
+configure it, the user sets the media bus format on the subdev's sink
+pad. Now the actual crop rectangle can be set on the sink pad --- the
+location and size of this rectangle reflect the location and size of a
+rectangle to be cropped from the sink format. The size of the sink crop
+rectangle will also be the size of the format of the subdev's source
+pad.
+
+
+.. _subdev-image-processing-scaling-multi-source:
+
+.. kernel-figure:: subdev-image-processing-scaling-multi-source.svg
+    :alt:   subdev-image-processing-scaling-multi-source.svg
+    :align: center
+
+    **Figure 4.6. Image processing in subdevs: scaling with multiple sources**
+
+In this example, the subdev is capable of first cropping, then scaling
+and finally cropping for two source pads individually from the resulting
+scaled image. The location of the scaled image in the cropped image is
+ignored in sink compose target. Both of the locations of the source crop
+rectangles refer to the sink scaling rectangle, independently cropping
+an area at location specified by the source crop rectangle from it.
+
+
+.. _subdev-image-processing-full:
+
+.. kernel-figure:: subdev-image-processing-full.svg
+    :alt:    subdev-image-processing-full.svg
+    :align:  center
+
+    **Figure 4.7. Image processing in subdevs: scaling and composition with multiple sinks and sources**
+
+The subdev driver supports two sink pads and two source pads. The images
+from both of the sink pads are individually cropped, then scaled and
+further composed on the composition bounds rectangle. From that, two
+independent streams are cropped and sent out of the subdev from the
+source pads.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    subdev-formats
diff --git a/Documentation/userspace-api/media/v4l/dev-touch.rst b/Documentation/userspace-api/media/v4l/dev-touch.rst
new file mode 100644
index 000000000..a71b9def5
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dev-touch.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _touch:
+
+*************
+Touch Devices
+*************
+
+Touch devices are accessed through character device special files named
+``/dev/v4l-touch0`` to ``/dev/v4l-touch255`` with major number 81 and
+dynamically allocated minor numbers 0 to 255.
+
+Overview
+========
+
+Sensors may be Optical, or Projected Capacitive touch (PCT).
+
+Processing is required to analyse the raw data and produce input events. In
+some systems, this may be performed on the ASIC and the raw data is purely a
+side-channel for diagnostics or tuning. In other systems, the ASIC is a simple
+analogue front end device which delivers touch data at high rate, and any touch
+processing must be done on the host.
+
+For capacitive touch sensing, the touchscreen is composed of an array of
+horizontal and vertical conductors (alternatively called rows/columns, X/Y
+lines, or tx/rx). Mutual Capacitance measured is at the nodes where the
+conductors cross. Alternatively, Self Capacitance measures the signal from each
+column and row independently.
+
+A touch input may be determined by comparing the raw capacitance measurement to
+a no-touch reference (or "baseline") measurement:
+
+Delta = Raw - Reference
+
+The reference measurement takes account of variations in the capacitance across
+the touch sensor matrix, for example manufacturing irregularities,
+environmental or edge effects.
+
+Querying Capabilities
+=====================
+
+Devices supporting the touch interface set the ``V4L2_CAP_VIDEO_CAPTURE`` flag
+and the ``V4L2_CAP_TOUCH`` flag in the ``capabilities`` field of
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl.
+
+At least one of the read/write or streaming I/O methods must be
+supported.
+
+The formats supported by touch devices are documented in
+:ref:`Touch Formats <tch-formats>`.
+
+Data Format Negotiation
+=======================
+
+A touch device may support any I/O method.
diff --git a/Documentation/userspace-api/media/v4l/devices.rst b/Documentation/userspace-api/media/v4l/devices.rst
new file mode 100644
index 000000000..8bfbad65a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/devices.rst
@@ -0,0 +1,26 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _devices:
+
+**********
+Interfaces
+**********
+
+
+.. toctree::
+    :maxdepth: 1
+
+    dev-capture
+    dev-overlay
+    dev-output
+    dev-osd
+    dev-mem2mem
+    dev-raw-vbi
+    dev-sliced-vbi
+    dev-radio
+    dev-rds
+    dev-sdr
+    dev-touch
+    dev-event
+    dev-subdev
+    dev-meta
diff --git a/Documentation/userspace-api/media/v4l/diff-v4l.rst b/Documentation/userspace-api/media/v4l/diff-v4l.rst
new file mode 100644
index 000000000..caa05fbbd
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/diff-v4l.rst
@@ -0,0 +1,659 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _diff-v4l:
+
+********************************
+Differences between V4L and V4L2
+********************************
+
+The Video For Linux API was first introduced in Linux 2.1 to unify and
+replace various TV and radio device related interfaces, developed
+independently by driver writers in prior years. Starting with Linux 2.5
+the much improved V4L2 API replaces the V4L API. The support for the old
+V4L calls were removed from Kernel, but the library :ref:`libv4l`
+supports the conversion of a V4L API system call into a V4L2 one.
+
+Opening and Closing Devices
+===========================
+
+For compatibility reasons the character device file names recommended
+for V4L2 video capture, overlay, radio and raw vbi capture devices did
+not change from those used by V4L. They are listed in :ref:`devices`
+and below in :ref:`v4l-dev`.
+
+The teletext devices (minor range 192-223) have been removed in V4L2 and
+no longer exist. There is no hardware available anymore for handling
+pure teletext. Instead raw or sliced VBI is used.
+
+The V4L ``videodev`` module automatically assigns minor numbers to
+drivers in load order, depending on the registered device type. We
+recommend that V4L2 drivers by default register devices with the same
+numbers, but the system administrator can assign arbitrary minor numbers
+using driver module options. The major device number remains 81.
+
+.. _v4l-dev:
+
+.. flat-table:: V4L Device Types, Names and Numbers
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Device Type
+      - File Name
+      - Minor Numbers
+    * - Video capture and overlay
+      - ``/dev/video`` and ``/dev/bttv0``\  [#f1]_, ``/dev/video0`` to
+	``/dev/video63``
+      - 0-63
+    * - Radio receiver
+      - ``/dev/radio``\  [#f2]_, ``/dev/radio0`` to ``/dev/radio63``
+      - 64-127
+    * - Raw VBI capture
+      - ``/dev/vbi``, ``/dev/vbi0`` to ``/dev/vbi31``
+      - 224-255
+
+V4L prohibits (or used to prohibit) multiple opens of a device file.
+V4L2 drivers *may* support multiple opens, see :ref:`open` for details
+and consequences.
+
+V4L drivers respond to V4L2 ioctls with an ``EINVAL`` error code.
+
+Querying Capabilities
+=====================
+
+The V4L ``VIDIOCGCAP`` ioctl is equivalent to V4L2's
+:ref:`VIDIOC_QUERYCAP`.
+
+The ``name`` field in struct ``video_capability`` became
+``card`` in struct :c:type:`v4l2_capability`, ``type``
+was replaced by ``capabilities``. Note V4L2 does not distinguish between
+device types like this, better think of basic video input, video output
+and radio devices supporting a set of related functions like video
+capturing, video overlay and VBI capturing. See :ref:`open` for an
+introduction.
+
+.. tabularcolumns:: |p{5.5cm}|p{6.5cm}|p{5.5cm}
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - ``struct video_capability`` ``type``
+      - struct :c:type:`v4l2_capability`
+	``capabilities`` flags
+      - Purpose
+    * - ``VID_TYPE_CAPTURE``
+      - ``V4L2_CAP_VIDEO_CAPTURE``
+      - The :ref:`video capture <capture>` interface is supported.
+    * - ``VID_TYPE_TUNER``
+      - ``V4L2_CAP_TUNER``
+      - The device has a :ref:`tuner or modulator <tuner>`.
+    * - ``VID_TYPE_TELETEXT``
+      - ``V4L2_CAP_VBI_CAPTURE``
+      - The :ref:`raw VBI capture <raw-vbi>` interface is supported.
+    * - ``VID_TYPE_OVERLAY``
+      - ``V4L2_CAP_VIDEO_OVERLAY``
+      - The :ref:`video overlay <overlay>` interface is supported.
+    * - ``VID_TYPE_CHROMAKEY``
+      - ``V4L2_FBUF_CAP_CHROMAKEY`` in field ``capability`` of struct
+	:c:type:`v4l2_framebuffer`
+      - Whether chromakey overlay is supported. For more information on
+	overlay see :ref:`overlay`.
+    * - ``VID_TYPE_CLIPPING``
+      - ``V4L2_FBUF_CAP_LIST_CLIPPING`` and
+	``V4L2_FBUF_CAP_BITMAP_CLIPPING`` in field ``capability`` of
+	struct :c:type:`v4l2_framebuffer`
+      - Whether clipping the overlaid image is supported, see
+	:ref:`overlay`.
+    * - ``VID_TYPE_FRAMERAM``
+      - ``V4L2_FBUF_CAP_EXTERNOVERLAY`` *not set* in field ``capability``
+	of struct :c:type:`v4l2_framebuffer`
+      - Whether overlay overwrites frame buffer memory, see
+	:ref:`overlay`.
+    * - ``VID_TYPE_SCALES``
+      - ``-``
+      - This flag indicates if the hardware can scale images. The V4L2 API
+	implies the scale factor by setting the cropping dimensions and
+	image size with the :ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` and
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, respectively. The
+	driver returns the closest sizes possible. For more information on
+	cropping and scaling see :ref:`crop`.
+    * - ``VID_TYPE_MONOCHROME``
+      - ``-``
+      - Applications can enumerate the supported image formats with the
+	:ref:`VIDIOC_ENUM_FMT` ioctl to determine if
+	the device supports grey scale capturing only. For more
+	information on image formats see :ref:`pixfmt`.
+    * - ``VID_TYPE_SUBCAPTURE``
+      - ``-``
+      - Applications can call the :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>`
+	ioctl to determine if the device supports capturing a subsection
+	of the full picture ("cropping" in V4L2). If not, the ioctl
+	returns the ``EINVAL`` error code. For more information on cropping
+	and scaling see :ref:`crop`.
+    * - ``VID_TYPE_MPEG_DECODER``
+      - ``-``
+      - Applications can enumerate the supported image formats with the
+	:ref:`VIDIOC_ENUM_FMT` ioctl to determine if
+	the device supports MPEG streams.
+    * - ``VID_TYPE_MPEG_ENCODER``
+      - ``-``
+      - See above.
+    * - ``VID_TYPE_MJPEG_DECODER``
+      - ``-``
+      - See above.
+    * - ``VID_TYPE_MJPEG_ENCODER``
+      - ``-``
+      - See above.
+
+The ``audios`` field was replaced by ``capabilities`` flag
+``V4L2_CAP_AUDIO``, indicating *if* the device has any audio inputs or
+outputs. To determine their number applications can enumerate audio
+inputs with the :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` ioctl. The
+audio ioctls are described in :ref:`audio`.
+
+The ``maxwidth``, ``maxheight``, ``minwidth`` and ``minheight`` fields
+were removed. Calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` or
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl with the desired
+dimensions returns the closest size possible, taking into account the
+current video standard, cropping and scaling limitations.
+
+Video Sources
+=============
+
+V4L provides the ``VIDIOCGCHAN`` and ``VIDIOCSCHAN`` ioctl using struct
+``video_channel`` to enumerate the video inputs of a V4L
+device. The equivalent V4L2 ioctls are
+:ref:`VIDIOC_ENUMINPUT`,
+:ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` and
+:ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>` using struct
+:c:type:`v4l2_input` as discussed in :ref:`video`.
+
+The ``channel`` field counting inputs was renamed to ``index``, the
+video input types were renamed as follows:
+
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - struct ``video_channel`` ``type``
+      - struct :c:type:`v4l2_input` ``type``
+    * - ``VIDEO_TYPE_TV``
+      - ``V4L2_INPUT_TYPE_TUNER``
+    * - ``VIDEO_TYPE_CAMERA``
+      - ``V4L2_INPUT_TYPE_CAMERA``
+
+Unlike the ``tuners`` field expressing the number of tuners of this
+input, V4L2 assumes each video input is connected to at most one tuner.
+However a tuner can have more than one input, i. e. RF connectors, and a
+device can have multiple tuners. The index number of the tuner
+associated with the input, if any, is stored in field ``tuner`` of
+struct :c:type:`v4l2_input`. Enumeration of tuners is
+discussed in :ref:`tuner`.
+
+The redundant ``VIDEO_VC_TUNER`` flag was dropped. Video inputs
+associated with a tuner are of type ``V4L2_INPUT_TYPE_TUNER``. The
+``VIDEO_VC_AUDIO`` flag was replaced by the ``audioset`` field. V4L2
+considers devices with up to 32 audio inputs. Each set bit in the
+``audioset`` field represents one audio input this video input combines
+with. For information about audio inputs and how to switch between them
+see :ref:`audio`.
+
+The ``norm`` field describing the supported video standards was replaced
+by ``std``. The V4L specification mentions a flag ``VIDEO_VC_NORM``
+indicating whether the standard can be changed. This flag was a later
+addition together with the ``norm`` field and has been removed in the
+meantime. V4L2 has a similar, albeit more comprehensive approach to
+video standards, see :ref:`standard` for more information.
+
+Tuning
+======
+
+The V4L ``VIDIOCGTUNER`` and ``VIDIOCSTUNER`` ioctl and struct
+``video_tuner`` can be used to enumerate the tuners of a
+V4L TV or radio device. The equivalent V4L2 ioctls are
+:ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` and
+:ref:`VIDIOC_S_TUNER <VIDIOC_G_TUNER>` using struct
+:c:type:`v4l2_tuner`. Tuners are covered in :ref:`tuner`.
+
+The ``tuner`` field counting tuners was renamed to ``index``. The fields
+``name``, ``rangelow`` and ``rangehigh`` remained unchanged.
+
+The ``VIDEO_TUNER_PAL``, ``VIDEO_TUNER_NTSC`` and ``VIDEO_TUNER_SECAM``
+flags indicating the supported video standards were dropped. This
+information is now contained in the associated struct
+:c:type:`v4l2_input`. No replacement exists for the
+``VIDEO_TUNER_NORM`` flag indicating whether the video standard can be
+switched. The ``mode`` field to select a different video standard was
+replaced by a whole new set of ioctls and structures described in
+:ref:`standard`. Due to its ubiquity it should be mentioned the BTTV
+driver supports several standards in addition to the regular
+``VIDEO_MODE_PAL`` (0), ``VIDEO_MODE_NTSC``, ``VIDEO_MODE_SECAM`` and
+``VIDEO_MODE_AUTO`` (3). Namely N/PAL Argentina, M/PAL, N/PAL, and NTSC
+Japan with numbers 3-6 (sic).
+
+The ``VIDEO_TUNER_STEREO_ON`` flag indicating stereo reception became
+``V4L2_TUNER_SUB_STEREO`` in field ``rxsubchans``. This field also
+permits the detection of monaural and bilingual audio, see the
+definition of struct :c:type:`v4l2_tuner` for details.
+Presently no replacement exists for the ``VIDEO_TUNER_RDS_ON`` and
+``VIDEO_TUNER_MBS_ON`` flags.
+
+The ``VIDEO_TUNER_LOW`` flag was renamed to ``V4L2_TUNER_CAP_LOW`` in
+the struct :c:type:`v4l2_tuner` ``capability`` field.
+
+The ``VIDIOCGFREQ`` and ``VIDIOCSFREQ`` ioctl to change the tuner
+frequency where renamed to
+:ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` and
+:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>`. They take a pointer
+to a struct :c:type:`v4l2_frequency` instead of an
+unsigned long integer.
+
+.. _v4l-image-properties:
+
+Image Properties
+================
+
+V4L2 has no equivalent of the ``VIDIOCGPICT`` and ``VIDIOCSPICT`` ioctl
+and struct ``video_picture``. The following fields where
+replaced by V4L2 controls accessible with the
+:ref:`VIDIOC_QUERYCTRL`,
+:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and
+:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls:
+
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - struct ``video_picture``
+      - V4L2 Control ID
+    * - ``brightness``
+      - ``V4L2_CID_BRIGHTNESS``
+    * - ``hue``
+      - ``V4L2_CID_HUE``
+    * - ``colour``
+      - ``V4L2_CID_SATURATION``
+    * - ``contrast``
+      - ``V4L2_CID_CONTRAST``
+    * - ``whiteness``
+      - ``V4L2_CID_WHITENESS``
+
+The V4L picture controls are assumed to range from 0 to 65535 with no
+particular reset value. The V4L2 API permits arbitrary limits and
+defaults which can be queried with the
+:ref:`VIDIOC_QUERYCTRL` ioctl. For general
+information about controls see :ref:`control`.
+
+The ``depth`` (average number of bits per pixel) of a video image is
+implied by the selected image format. V4L2 does not explicitly provide
+such information assuming applications recognizing the format are aware
+of the image depth and others need not know. The ``palette`` field moved
+into the struct :c:type:`v4l2_pix_format`:
+
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - struct ``video_picture`` ``palette``
+      - struct :c:type:`v4l2_pix_format` ``pixfmt``
+    * - ``VIDEO_PALETTE_GREY``
+      - :ref:`V4L2_PIX_FMT_GREY <V4L2-PIX-FMT-GREY>`
+    * - ``VIDEO_PALETTE_HI240``
+      - :ref:`V4L2_PIX_FMT_HI240 <pixfmt-reserved>` [#f3]_
+    * - ``VIDEO_PALETTE_RGB565``
+      - :ref:`V4L2_PIX_FMT_RGB565 <pixfmt-rgb>`
+    * - ``VIDEO_PALETTE_RGB555``
+      - :ref:`V4L2_PIX_FMT_RGB555 <pixfmt-rgb>`
+    * - ``VIDEO_PALETTE_RGB24``
+      - :ref:`V4L2_PIX_FMT_BGR24 <pixfmt-rgb>`
+    * - ``VIDEO_PALETTE_RGB32``
+      - :ref:`V4L2_PIX_FMT_BGR32 <pixfmt-rgb>` [#f4]_
+    * - ``VIDEO_PALETTE_YUV422``
+      - :ref:`V4L2_PIX_FMT_YUYV <V4L2-PIX-FMT-YUYV>`
+    * - ``VIDEO_PALETTE_YUYV``\  [#f5]_
+      - :ref:`V4L2_PIX_FMT_YUYV <V4L2-PIX-FMT-YUYV>`
+    * - ``VIDEO_PALETTE_UYVY``
+      - :ref:`V4L2_PIX_FMT_UYVY <V4L2-PIX-FMT-UYVY>`
+    * - ``VIDEO_PALETTE_YUV420``
+      - None
+    * - ``VIDEO_PALETTE_YUV411``
+      - :ref:`V4L2_PIX_FMT_Y41P <V4L2-PIX-FMT-Y41P>` [#f6]_
+    * - ``VIDEO_PALETTE_RAW``
+      - None [#f7]_
+    * - ``VIDEO_PALETTE_YUV422P``
+      - :ref:`V4L2_PIX_FMT_YUV422P <V4L2-PIX-FMT-YUV422P>`
+    * - ``VIDEO_PALETTE_YUV411P``
+      - :ref:`V4L2_PIX_FMT_YUV411P <V4L2-PIX-FMT-YUV411P>` [#f8]_
+    * - ``VIDEO_PALETTE_YUV420P``
+      - :ref:`V4L2_PIX_FMT_YVU420 <V4L2-PIX-FMT-YVU420>`
+    * - ``VIDEO_PALETTE_YUV410P``
+      - :ref:`V4L2_PIX_FMT_YVU410 <V4L2-PIX-FMT-YVU410>`
+
+V4L2 image formats are defined in :ref:`pixfmt`. The image format can
+be selected with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl.
+
+Audio
+=====
+
+The ``VIDIOCGAUDIO`` and ``VIDIOCSAUDIO`` ioctl and struct
+``video_audio`` are used to enumerate the audio inputs
+of a V4L device. The equivalent V4L2 ioctls are
+:ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` and
+:ref:`VIDIOC_S_AUDIO <VIDIOC_G_AUDIO>` using struct
+:c:type:`v4l2_audio` as discussed in :ref:`audio`.
+
+The ``audio`` "channel number" field counting audio inputs was renamed
+to ``index``.
+
+On ``VIDIOCSAUDIO`` the ``mode`` field selects *one* of the
+``VIDEO_SOUND_MONO``, ``VIDEO_SOUND_STEREO``, ``VIDEO_SOUND_LANG1`` or
+``VIDEO_SOUND_LANG2`` audio demodulation modes. When the current audio
+standard is BTSC ``VIDEO_SOUND_LANG2`` refers to SAP and
+``VIDEO_SOUND_LANG1`` is meaningless. Also undocumented in the V4L
+specification, there is no way to query the selected mode. On
+``VIDIOCGAUDIO`` the driver returns the *actually received* audio
+programmes in this field. In the V4L2 API this information is stored in
+the struct :c:type:`v4l2_tuner` ``rxsubchans`` and
+``audmode`` fields, respectively. See :ref:`tuner` for more
+information on tuners. Related to audio modes struct
+:c:type:`v4l2_audio` also reports if this is a mono or
+stereo input, regardless if the source is a tuner.
+
+The following fields where replaced by V4L2 controls accessible with the
+:ref:`VIDIOC_QUERYCTRL`,
+:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and
+:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls:
+
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - struct ``video_audio``
+      - V4L2 Control ID
+    * - ``volume``
+      - ``V4L2_CID_AUDIO_VOLUME``
+    * - ``bass``
+      - ``V4L2_CID_AUDIO_BASS``
+    * - ``treble``
+      - ``V4L2_CID_AUDIO_TREBLE``
+    * - ``balance``
+      - ``V4L2_CID_AUDIO_BALANCE``
+
+To determine which of these controls are supported by a driver V4L
+provides the ``flags`` ``VIDEO_AUDIO_VOLUME``, ``VIDEO_AUDIO_BASS``,
+``VIDEO_AUDIO_TREBLE`` and ``VIDEO_AUDIO_BALANCE``. In the V4L2 API the
+:ref:`VIDIOC_QUERYCTRL` ioctl reports if the
+respective control is supported. Accordingly the ``VIDEO_AUDIO_MUTABLE``
+and ``VIDEO_AUDIO_MUTE`` flags where replaced by the boolean
+``V4L2_CID_AUDIO_MUTE`` control.
+
+All V4L2 controls have a ``step`` attribute replacing the struct
+``video_audio`` ``step`` field. The V4L audio controls
+are assumed to range from 0 to 65535 with no particular reset value. The
+V4L2 API permits arbitrary limits and defaults which can be queried with
+the :ref:`VIDIOC_QUERYCTRL` ioctl. For general
+information about controls see :ref:`control`.
+
+Frame Buffer Overlay
+====================
+
+The V4L2 ioctls equivalent to ``VIDIOCGFBUF`` and ``VIDIOCSFBUF`` are
+:ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` and
+:ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`. The ``base`` field of struct
+``video_buffer`` remained unchanged, except V4L2 defines
+a flag to indicate non-destructive overlays instead of a ``NULL``
+pointer. All other fields moved into the struct
+:c:type:`v4l2_pix_format` ``fmt`` substructure of
+struct :c:type:`v4l2_framebuffer`. The ``depth``
+field was replaced by ``pixelformat``. See :ref:`pixfmt-rgb` for a
+list of RGB formats and their respective color depths.
+
+Instead of the special ioctls ``VIDIOCGWIN`` and ``VIDIOCSWIN`` V4L2
+uses the general-purpose data format negotiation ioctls
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`. They take a pointer to a struct
+:c:type:`v4l2_format` as argument. Here the ``win`` member
+of the ``fmt`` union is used, a struct
+:c:type:`v4l2_window`.
+
+The ``x``, ``y``, ``width`` and ``height`` fields of struct
+``video_window`` moved into struct
+:c:type:`v4l2_rect` substructure ``w`` of struct
+:c:type:`v4l2_window`. The ``chromakey``, ``clips``, and
+``clipcount`` fields remained unchanged. Struct
+``video_clip`` was renamed to struct
+:c:type:`v4l2_clip`, also containing a struct
+:c:type:`v4l2_rect`, but the semantics are still the same.
+
+The ``VIDEO_WINDOW_INTERLACE`` flag was dropped. Instead applications
+must set the ``field`` field to ``V4L2_FIELD_ANY`` or
+``V4L2_FIELD_INTERLACED``. The ``VIDEO_WINDOW_CHROMAKEY`` flag moved
+into struct :c:type:`v4l2_framebuffer`, under the new
+name ``V4L2_FBUF_FLAG_CHROMAKEY``.
+
+In V4L, storing a bitmap pointer in ``clips`` and setting ``clipcount``
+to ``VIDEO_CLIP_BITMAP`` (-1) requests bitmap clipping, using a fixed
+size bitmap of 1024 × 625 bits. Struct :c:type:`v4l2_window`
+has a separate ``bitmap`` pointer field for this purpose and the bitmap
+size is determined by ``w.width`` and ``w.height``.
+
+The ``VIDIOCCAPTURE`` ioctl to enable or disable overlay was renamed to
+:ref:`VIDIOC_OVERLAY`.
+
+Cropping
+========
+
+To capture only a subsection of the full picture V4L defines the
+``VIDIOCGCAPTURE`` and ``VIDIOCSCAPTURE`` ioctls using struct
+``video_capture``. The equivalent V4L2 ioctls are
+:ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and
+:ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` using struct
+:c:type:`v4l2_crop`, and the related
+:ref:`VIDIOC_CROPCAP` ioctl. This is a rather
+complex matter, see :ref:`crop` for details.
+
+The ``x``, ``y``, ``width`` and ``height`` fields moved into struct
+:c:type:`v4l2_rect` substructure ``c`` of struct
+:c:type:`v4l2_crop`. The ``decimation`` field was dropped. In
+the V4L2 API the scaling factor is implied by the size of the cropping
+rectangle and the size of the captured or overlaid image.
+
+The ``VIDEO_CAPTURE_ODD`` and ``VIDEO_CAPTURE_EVEN`` flags to capture
+only the odd or even field, respectively, were replaced by
+``V4L2_FIELD_TOP`` and ``V4L2_FIELD_BOTTOM`` in the field named
+``field`` of struct :c:type:`v4l2_pix_format` and
+struct :c:type:`v4l2_window`. These structures are used to
+select a capture or overlay format with the
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl.
+
+Reading Images, Memory Mapping
+==============================
+
+Capturing using the read method
+-------------------------------
+
+There is no essential difference between reading images from a V4L or
+V4L2 device using the :c:func:`read()` function, however V4L2
+drivers are not required to support this I/O method. Applications can
+determine if the function is available with the
+:ref:`VIDIOC_QUERYCAP` ioctl. All V4L2 devices
+exchanging data with applications must support the
+:c:func:`select()` and :c:func:`poll()`
+functions.
+
+To select an image format and size, V4L provides the ``VIDIOCSPICT`` and
+``VIDIOCSWIN`` ioctls. V4L2 uses the general-purpose data format
+negotiation ioctls :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`. They take a pointer to a struct
+:c:type:`v4l2_format` as argument, here the struct
+:c:type:`v4l2_pix_format` named ``pix`` of its
+``fmt`` union is used.
+
+For more information about the V4L2 read interface see :ref:`rw`.
+
+Capturing using memory mapping
+------------------------------
+
+Applications can read from V4L devices by mapping buffers in device
+memory, or more often just buffers allocated in DMA-able system memory,
+into their address space. This avoids the data copying overhead of the
+read method. V4L2 supports memory mapping as well, with a few
+differences.
+
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - V4L
+      - V4L2
+    * -
+      - The image format must be selected before buffers are allocated,
+	with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. When no
+	format is selected the driver may use the last, possibly by
+	another application requested format.
+    * - Applications cannot change the number of buffers. The it is built
+	into the driver, unless it has a module option to change the
+	number when the driver module is loaded.
+      - The :ref:`VIDIOC_REQBUFS` ioctl allocates the
+	desired number of buffers, this is a required step in the
+	initialization sequence.
+    * - Drivers map all buffers as one contiguous range of memory. The
+	``VIDIOCGMBUF`` ioctl is available to query the number of buffers,
+	the offset of each buffer from the start of the virtual file, and
+	the overall amount of memory used, which can be used as arguments
+	for the :c:func:`mmap()` function.
+      - Buffers are individually mapped. The offset and size of each
+	buffer can be determined with the
+	:ref:`VIDIOC_QUERYBUF` ioctl.
+    * - The ``VIDIOCMCAPTURE`` ioctl prepares a buffer for capturing. It
+	also determines the image format for this buffer. The ioctl
+	returns immediately, eventually with an ``EAGAIN`` error code if no
+	video signal had been detected. When the driver supports more than
+	one buffer applications can call the ioctl multiple times and thus
+	have multiple outstanding capture requests.
+
+	The ``VIDIOCSYNC`` ioctl suspends execution until a particular
+	buffer has been filled.
+      - Drivers maintain an incoming and outgoing queue.
+	:ref:`VIDIOC_QBUF` enqueues any empty buffer into
+	the incoming queue. Filled buffers are dequeued from the outgoing
+	queue with the :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. To wait
+	until filled buffers become available this function,
+	:c:func:`select()` or :c:func:`poll()` can
+	be used. The :ref:`VIDIOC_STREAMON` ioctl
+	must be called once after enqueuing one or more buffers to start
+	capturing. Its counterpart
+	:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` stops capturing and
+	dequeues all buffers from both queues. Applications can query the
+	signal status, if known, with the
+	:ref:`VIDIOC_ENUMINPUT` ioctl.
+
+For a more in-depth discussion of memory mapping and examples, see
+:ref:`mmap`.
+
+Reading Raw VBI Data
+====================
+
+Originally the V4L API did not specify a raw VBI capture interface, only
+the device file ``/dev/vbi`` was reserved for this purpose. The only
+driver supporting this interface was the BTTV driver, de-facto defining
+the V4L VBI interface. Reading from the device yields a raw VBI image
+with the following parameters:
+
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - struct :c:type:`v4l2_vbi_format`
+      - V4L, BTTV driver
+    * - sampling_rate
+      - 28636363 Hz NTSC (or any other 525-line standard); 35468950 Hz PAL
+	and SECAM (625-line standards)
+    * - offset
+      - ?
+    * - samples_per_line
+      - 2048
+    * - sample_format
+      - V4L2_PIX_FMT_GREY. The last four bytes (a machine endianness
+	integer) contain a frame counter.
+    * - start[]
+      - 10, 273 NTSC; 22, 335 PAL and SECAM
+    * - count[]
+      - 16, 16 [#f9]_
+    * - flags
+      - 0
+
+Undocumented in the V4L specification, in Linux 2.3 the
+``VIDIOCGVBIFMT`` and ``VIDIOCSVBIFMT`` ioctls using struct
+``vbi_format`` were added to determine the VBI image
+parameters. These ioctls are only partially compatible with the V4L2 VBI
+interface specified in :ref:`raw-vbi`.
+
+An ``offset`` field does not exist, ``sample_format`` is supposed to be
+``VIDEO_PALETTE_RAW``, equivalent to ``V4L2_PIX_FMT_GREY``. The
+remaining fields are probably equivalent to struct
+:c:type:`v4l2_vbi_format`.
+
+Apparently only the Zoran (ZR 36120) driver implements these ioctls. The
+semantics differ from those specified for V4L2 in two ways. The
+parameters are reset on :c:func:`open()` and
+``VIDIOCSVBIFMT`` always returns an ``EINVAL`` error code if the parameters
+are invalid.
+
+Miscellaneous
+=============
+
+V4L2 has no equivalent of the ``VIDIOCGUNIT`` ioctl. Applications can
+find the VBI device associated with a video capture device (or vice
+versa) by reopening the device and requesting VBI data. For details see
+:ref:`open`.
+
+No replacement exists for ``VIDIOCKEY``, and the V4L functions for
+microcode programming. A new interface for MPEG compression and playback
+devices is documented in :ref:`extended-controls`.
+
+.. [#f1]
+   According to Documentation/admin-guide/devices.rst these should be symbolic links
+   to ``/dev/video0``. Note the original bttv interface is not
+   compatible with V4L or V4L2.
+
+.. [#f2]
+   According to ``Documentation/admin-guide/devices.rst`` a symbolic link to
+   ``/dev/radio0``.
+
+.. [#f3]
+   This is a custom format used by the BTTV driver, not one of the V4L2
+   standard formats.
+
+.. [#f4]
+   Presumably all V4L RGB formats are little-endian, although some
+   drivers might interpret them according to machine endianness. V4L2
+   defines little-endian, big-endian and red/blue swapped variants. For
+   details see :ref:`pixfmt-rgb`.
+
+.. [#f5]
+   ``VIDEO_PALETTE_YUV422`` and ``VIDEO_PALETTE_YUYV`` are the same
+   formats. Some V4L drivers respond to one, some to the other.
+
+.. [#f6]
+   Not to be confused with ``V4L2_PIX_FMT_YUV411P``, which is a planar
+   format.
+
+.. [#f7]
+   V4L explains this as: "RAW capture (BT848)"
+
+.. [#f8]
+   Not to be confused with ``V4L2_PIX_FMT_Y41P``, which is a packed
+   format.
+
+.. [#f9]
+   Old driver versions used different values, eventually the custom
+   ``BTTV_VBISIZE`` ioctl was added to query the correct values.
diff --git a/Documentation/userspace-api/media/v4l/dmabuf.rst b/Documentation/userspace-api/media/v4l/dmabuf.rst
new file mode 100644
index 000000000..50fba11c2
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dmabuf.rst
@@ -0,0 +1,162 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _dmabuf:
+
+************************************
+Streaming I/O (DMA buffer importing)
+************************************
+
+The DMABUF framework provides a generic method for sharing buffers
+between multiple devices. Device drivers that support DMABUF can export
+a DMA buffer to userspace as a file descriptor (known as the exporter
+role), import a DMA buffer from userspace using a file descriptor
+previously exported for a different or the same device (known as the
+importer role), or both. This section describes the DMABUF importer role
+API in V4L2.
+
+Refer to :ref:`DMABUF exporting <VIDIOC_EXPBUF>` for details about
+exporting V4L2 buffers as DMABUF file descriptors.
+
+Input and output devices support the streaming I/O method when the
+``V4L2_CAP_STREAMING`` flag in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP <VIDIOC_QUERYCAP>` ioctl is set. Whether
+importing DMA buffers through DMABUF file descriptors is supported is
+determined by calling the :ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`
+ioctl with the memory type set to ``V4L2_MEMORY_DMABUF``.
+
+This I/O method is dedicated to sharing DMA buffers between different
+devices, which may be V4L devices or other video-related devices (e.g.
+DRM). Buffers (planes) are allocated by a driver on behalf of an
+application. Next, these buffers are exported to the application as file
+descriptors using an API which is specific for an allocator driver. Only
+such file descriptor are exchanged. The descriptors and meta-information
+are passed in struct :c:type:`v4l2_buffer` (or in struct
+:c:type:`v4l2_plane` in the multi-planar API case). The
+driver must be switched into DMABUF I/O mode by calling the
+:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>` with the desired buffer type.
+
+Example: Initiating streaming I/O with DMABUF file descriptors
+==============================================================
+
+.. code-block:: c
+
+    struct v4l2_requestbuffers reqbuf;
+
+    memset(&reqbuf, 0, sizeof (reqbuf));
+    reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    reqbuf.memory = V4L2_MEMORY_DMABUF;
+    reqbuf.count = 1;
+
+    if (ioctl(fd, VIDIOC_REQBUFS, &reqbuf) == -1) {
+	if (errno == EINVAL)
+	    printf("Video capturing or DMABUF streaming is not supported\\n");
+	else
+	    perror("VIDIOC_REQBUFS");
+
+	exit(EXIT_FAILURE);
+    }
+
+The buffer (plane) file descriptor is passed on the fly with the
+:ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl. In case of multiplanar
+buffers, every plane can be associated with a different DMABUF
+descriptor. Although buffers are commonly cycled, applications can pass
+a different DMABUF descriptor at each :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` call.
+
+Example: Queueing DMABUF using single plane API
+===============================================
+
+.. code-block:: c
+
+    int buffer_queue(int v4lfd, int index, int dmafd)
+    {
+	struct v4l2_buffer buf;
+
+	memset(&buf, 0, sizeof buf);
+	buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	buf.memory = V4L2_MEMORY_DMABUF;
+	buf.index = index;
+	buf.m.fd = dmafd;
+
+	if (ioctl(v4lfd, VIDIOC_QBUF, &buf) == -1) {
+	    perror("VIDIOC_QBUF");
+	    return -1;
+	}
+
+	return 0;
+    }
+
+Example 3.6. Queueing DMABUF using multi plane API
+==================================================
+
+.. code-block:: c
+
+    int buffer_queue_mp(int v4lfd, int index, int dmafd[], int n_planes)
+    {
+	struct v4l2_buffer buf;
+	struct v4l2_plane planes[VIDEO_MAX_PLANES];
+	int i;
+
+	memset(&buf, 0, sizeof buf);
+	buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+	buf.memory = V4L2_MEMORY_DMABUF;
+	buf.index = index;
+	buf.m.planes = planes;
+	buf.length = n_planes;
+
+	memset(&planes, 0, sizeof planes);
+
+	for (i = 0; i < n_planes; ++i)
+	    buf.m.planes[i].m.fd = dmafd[i];
+
+	if (ioctl(v4lfd, VIDIOC_QBUF, &buf) == -1) {
+	    perror("VIDIOC_QBUF");
+	    return -1;
+	}
+
+	return 0;
+    }
+
+Captured or displayed buffers are dequeued with the
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. The driver can unlock the
+buffer at any time between the completion of the DMA and this ioctl. The
+memory is also unlocked when
+:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` is called,
+:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, or when the device is closed.
+
+For capturing applications it is customary to enqueue a number of empty
+buffers, to start capturing and enter the read loop. Here the
+application waits until a filled buffer can be dequeued, and re-enqueues
+the buffer when the data is no longer needed. Output applications fill
+and enqueue buffers, when enough buffers are stacked up output is
+started. In the write loop, when the application runs out of free
+buffers it must wait until an empty buffer can be dequeued and reused.
+Two methods exist to suspend execution of the application until one or
+more buffers can be dequeued. By default :ref:`VIDIOC_DQBUF
+<VIDIOC_QBUF>` blocks when no buffer is in the outgoing queue. When the
+``O_NONBLOCK`` flag was given to the :c:func:`open()` function,
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` returns immediately with an ``EAGAIN``
+error code when no buffer is available. The
+:c:func:`select()` and :c:func:`poll()`
+functions are always available.
+
+To start and stop capturing or displaying applications call the
+:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` and
+:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls.
+
+.. note::
+
+   :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` removes all buffers from
+   both queues and unlocks all buffers as a side effect. Since there is no
+   notion of doing anything "now" on a multitasking system, if an
+   application needs to synchronize with another event it should examine
+   the struct :c:type:`v4l2_buffer` ``timestamp`` of captured or
+   outputted buffers.
+
+Drivers implementing DMABUF importing I/O must support the
+:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`,
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_STREAMON
+<VIDIOC_STREAMON>` and :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls,
+and the :c:func:`select()` and :c:func:`poll()`
+functions.
diff --git a/Documentation/userspace-api/media/v4l/dv-timings.rst b/Documentation/userspace-api/media/v4l/dv-timings.rst
new file mode 100644
index 000000000..e17f056b1
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/dv-timings.rst
@@ -0,0 +1,38 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dv-timings:
+
+**************************
+Digital Video (DV) Timings
+**************************
+
+The video standards discussed so far have been dealing with Analog TV
+and the corresponding video timings. Today there are many more different
+hardware interfaces such as High Definition TV interfaces (HDMI), VGA,
+DVI connectors etc., that carry video signals and there is a need to
+extend the API to select the video timings for these interfaces. Since
+it is not possible to extend the :ref:`v4l2_std_id <v4l2-std-id>`
+due to the limited bits available, a new set of ioctls was added to
+set/get video timings at the input and output.
+
+These ioctls deal with the detailed digital video timings that define
+each video format. This includes parameters such as the active video
+width and height, signal polarities, frontporches, backporches, sync
+widths etc. The ``linux/v4l2-dv-timings.h`` header can be used to get
+the timings of the formats in the :ref:`cea861` and :ref:`vesadmt`
+standards.
+
+To enumerate and query the attributes of the DV timings supported by a
+device applications use the
+:ref:`VIDIOC_ENUM_DV_TIMINGS` and
+:ref:`VIDIOC_DV_TIMINGS_CAP` ioctls. To set
+DV timings for the device applications use the
+:ref:`VIDIOC_S_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` ioctl and to get
+current DV timings they use the
+:ref:`VIDIOC_G_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` ioctl. To detect
+the DV timings as seen by the video receiver applications use the
+:ref:`VIDIOC_QUERY_DV_TIMINGS` ioctl.
+
+Applications can make use of the :ref:`input-capabilities` and
+:ref:`output-capabilities` flags to determine whether the digital
+video ioctls can be used with the given input or output.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst
new file mode 100644
index 000000000..c05a2d2c6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst
@@ -0,0 +1,659 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _camera-controls:
+
+************************
+Camera Control Reference
+************************
+
+The Camera class includes controls for mechanical (or equivalent
+digital) features of a device such as controllable lenses or sensors.
+
+
+.. _camera-control-id:
+
+Camera Control IDs
+==================
+
+``V4L2_CID_CAMERA_CLASS (class)``
+    The Camera class descriptor. Calling
+    :ref:`VIDIOC_QUERYCTRL` for this control will
+    return a description of this control class.
+
+.. _v4l2-exposure-auto-type:
+
+``V4L2_CID_EXPOSURE_AUTO``
+    (enum)
+
+enum v4l2_exposure_auto_type -
+    Enables automatic adjustments of the exposure time and/or iris
+    aperture. The effect of manual changes of the exposure time or iris
+    aperture while these features are enabled is undefined, drivers
+    should ignore such requests. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_EXPOSURE_AUTO``
+      - Automatic exposure time, automatic iris aperture.
+    * - ``V4L2_EXPOSURE_MANUAL``
+      - Manual exposure time, manual iris.
+    * - ``V4L2_EXPOSURE_SHUTTER_PRIORITY``
+      - Manual exposure time, auto iris.
+    * - ``V4L2_EXPOSURE_APERTURE_PRIORITY``
+      - Auto exposure time, manual iris.
+
+
+
+``V4L2_CID_EXPOSURE_ABSOLUTE (integer)``
+    Determines the exposure time of the camera sensor. The exposure time
+    is limited by the frame interval. Drivers should interpret the
+    values as 100 µs units, where the value 1 stands for 1/10000th of a
+    second, 10000 for 1 second and 100000 for 10 seconds.
+
+``V4L2_CID_EXPOSURE_AUTO_PRIORITY (boolean)``
+    When ``V4L2_CID_EXPOSURE_AUTO`` is set to ``AUTO`` or
+    ``APERTURE_PRIORITY``, this control determines if the device may
+    dynamically vary the frame rate. By default this feature is disabled
+    (0) and the frame rate must remain constant.
+
+``V4L2_CID_AUTO_EXPOSURE_BIAS (integer menu)``
+    Determines the automatic exposure compensation, it is effective only
+    when ``V4L2_CID_EXPOSURE_AUTO`` control is set to ``AUTO``,
+    ``SHUTTER_PRIORITY`` or ``APERTURE_PRIORITY``. It is expressed in
+    terms of EV, drivers should interpret the values as 0.001 EV units,
+    where the value 1000 stands for +1 EV.
+
+    Increasing the exposure compensation value is equivalent to
+    decreasing the exposure value (EV) and will increase the amount of
+    light at the image sensor. The camera performs the exposure
+    compensation by adjusting absolute exposure time and/or aperture.
+
+.. _v4l2-exposure-metering:
+
+``V4L2_CID_EXPOSURE_METERING``
+    (enum)
+
+enum v4l2_exposure_metering -
+    Determines how the camera measures the amount of light available for
+    the frame exposure. Possible values are:
+
+.. tabularcolumns:: |p{8.7cm}|p{8.8cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_EXPOSURE_METERING_AVERAGE``
+      - Use the light information coming from the entire frame and average
+	giving no weighting to any particular portion of the metered area.
+    * - ``V4L2_EXPOSURE_METERING_CENTER_WEIGHTED``
+      - Average the light information coming from the entire frame giving
+	priority to the center of the metered area.
+    * - ``V4L2_EXPOSURE_METERING_SPOT``
+      - Measure only very small area at the center of the frame.
+    * - ``V4L2_EXPOSURE_METERING_MATRIX``
+      - A multi-zone metering. The light intensity is measured in several
+	points of the frame and the results are combined. The algorithm of
+	the zones selection and their significance in calculating the
+	final value is device dependent.
+
+
+
+``V4L2_CID_PAN_RELATIVE (integer)``
+    This control turns the camera horizontally by the specified amount.
+    The unit is undefined. A positive value moves the camera to the
+    right (clockwise when viewed from above), a negative value to the
+    left. A value of zero does not cause motion. This is a write-only
+    control.
+
+``V4L2_CID_TILT_RELATIVE (integer)``
+    This control turns the camera vertically by the specified amount.
+    The unit is undefined. A positive value moves the camera up, a
+    negative value down. A value of zero does not cause motion. This is
+    a write-only control.
+
+``V4L2_CID_PAN_RESET (button)``
+    When this control is set, the camera moves horizontally to the
+    default position.
+
+``V4L2_CID_TILT_RESET (button)``
+    When this control is set, the camera moves vertically to the default
+    position.
+
+``V4L2_CID_PAN_ABSOLUTE (integer)``
+    This control turns the camera horizontally to the specified
+    position. Positive values move the camera to the right (clockwise
+    when viewed from above), negative values to the left. Drivers should
+    interpret the values as arc seconds, with valid values between -180
+    * 3600 and +180 * 3600 inclusive.
+
+``V4L2_CID_TILT_ABSOLUTE (integer)``
+    This control turns the camera vertically to the specified position.
+    Positive values move the camera up, negative values down. Drivers
+    should interpret the values as arc seconds, with valid values
+    between -180 * 3600 and +180 * 3600 inclusive.
+
+``V4L2_CID_FOCUS_ABSOLUTE (integer)``
+    This control sets the focal point of the camera to the specified
+    position. The unit is undefined. Positive values set the focus
+    closer to the camera, negative values towards infinity.
+
+``V4L2_CID_FOCUS_RELATIVE (integer)``
+    This control moves the focal point of the camera by the specified
+    amount. The unit is undefined. Positive values move the focus closer
+    to the camera, negative values towards infinity. This is a
+    write-only control.
+
+``V4L2_CID_FOCUS_AUTO (boolean)``
+    Enables continuous automatic focus adjustments. The effect of manual
+    focus adjustments while this feature is enabled is undefined,
+    drivers should ignore such requests.
+
+``V4L2_CID_AUTO_FOCUS_START (button)``
+    Starts single auto focus process. The effect of setting this control
+    when ``V4L2_CID_FOCUS_AUTO`` is set to ``TRUE`` (1) is undefined,
+    drivers should ignore such requests.
+
+``V4L2_CID_AUTO_FOCUS_STOP (button)``
+    Aborts automatic focusing started with ``V4L2_CID_AUTO_FOCUS_START``
+    control. It is effective only when the continuous autofocus is
+    disabled, that is when ``V4L2_CID_FOCUS_AUTO`` control is set to
+    ``FALSE`` (0).
+
+.. _v4l2-auto-focus-status:
+
+``V4L2_CID_AUTO_FOCUS_STATUS (bitmask)``
+    The automatic focus status. This is a read-only control.
+
+    Setting ``V4L2_LOCK_FOCUS`` lock bit of the ``V4L2_CID_3A_LOCK``
+    control may stop updates of the ``V4L2_CID_AUTO_FOCUS_STATUS``
+    control value.
+
+.. tabularcolumns:: |p{6.7cm}|p{10.8cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_AUTO_FOCUS_STATUS_IDLE``
+      - Automatic focus is not active.
+    * - ``V4L2_AUTO_FOCUS_STATUS_BUSY``
+      - Automatic focusing is in progress.
+    * - ``V4L2_AUTO_FOCUS_STATUS_REACHED``
+      - Focus has been reached.
+    * - ``V4L2_AUTO_FOCUS_STATUS_FAILED``
+      - Automatic focus has failed, the driver will not transition from
+	this state until another action is performed by an application.
+
+
+
+.. _v4l2-auto-focus-range:
+
+``V4L2_CID_AUTO_FOCUS_RANGE``
+    (enum)
+
+enum v4l2_auto_focus_range -
+    Determines auto focus distance range for which lens may be adjusted.
+
+.. tabularcolumns:: |p{6.8cm}|p{10.7cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_AUTO_FOCUS_RANGE_AUTO``
+      - The camera automatically selects the focus range.
+    * - ``V4L2_AUTO_FOCUS_RANGE_NORMAL``
+      - Normal distance range, limited for best automatic focus
+	performance.
+    * - ``V4L2_AUTO_FOCUS_RANGE_MACRO``
+      - Macro (close-up) auto focus. The camera will use its minimum
+	possible distance for auto focus.
+    * - ``V4L2_AUTO_FOCUS_RANGE_INFINITY``
+      - The lens is set to focus on an object at infinite distance.
+
+
+
+``V4L2_CID_ZOOM_ABSOLUTE (integer)``
+    Specify the objective lens focal length as an absolute value. The
+    zoom unit is driver-specific and its value should be a positive
+    integer.
+
+``V4L2_CID_ZOOM_RELATIVE (integer)``
+    Specify the objective lens focal length relatively to the current
+    value. Positive values move the zoom lens group towards the
+    telephoto direction, negative values towards the wide-angle
+    direction. The zoom unit is driver-specific. This is a write-only
+    control.
+
+``V4L2_CID_ZOOM_CONTINUOUS (integer)``
+    Move the objective lens group at the specified speed until it
+    reaches physical device limits or until an explicit request to stop
+    the movement. A positive value moves the zoom lens group towards the
+    telephoto direction. A value of zero stops the zoom lens group
+    movement. A negative value moves the zoom lens group towards the
+    wide-angle direction. The zoom speed unit is driver-specific.
+
+``V4L2_CID_IRIS_ABSOLUTE (integer)``
+    This control sets the camera's aperture to the specified value. The
+    unit is undefined. Larger values open the iris wider, smaller values
+    close it.
+
+``V4L2_CID_IRIS_RELATIVE (integer)``
+    This control modifies the camera's aperture by the specified amount.
+    The unit is undefined. Positive values open the iris one step
+    further, negative values close it one step further. This is a
+    write-only control.
+
+``V4L2_CID_PRIVACY (boolean)``
+    Prevent video from being acquired by the camera. When this control
+    is set to ``TRUE`` (1), no image can be captured by the camera.
+    Common means to enforce privacy are mechanical obturation of the
+    sensor and firmware image processing, but the device is not
+    restricted to these methods. Devices that implement the privacy
+    control must support read access and may support write access.
+
+``V4L2_CID_BAND_STOP_FILTER (integer)``
+    Switch the band-stop filter of a camera sensor on or off, or specify
+    its strength. Such band-stop filters can be used, for example, to
+    filter out the fluorescent light component.
+
+.. _v4l2-auto-n-preset-white-balance:
+
+``V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE``
+    (enum)
+
+enum v4l2_auto_n_preset_white_balance -
+    Sets white balance to automatic, manual or a preset. The presets
+    determine color temperature of the light as a hint to the camera for
+    white balance adjustments resulting in most accurate color
+    representation. The following white balance presets are listed in
+    order of increasing color temperature.
+
+.. tabularcolumns:: |p{7.2 cm}|p{10.3cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_WHITE_BALANCE_MANUAL``
+      - Manual white balance.
+    * - ``V4L2_WHITE_BALANCE_AUTO``
+      - Automatic white balance adjustments.
+    * - ``V4L2_WHITE_BALANCE_INCANDESCENT``
+      - White balance setting for incandescent (tungsten) lighting. It
+	generally cools down the colors and corresponds approximately to
+	2500...3500 K color temperature range.
+    * - ``V4L2_WHITE_BALANCE_FLUORESCENT``
+      - White balance preset for fluorescent lighting. It corresponds
+	approximately to 4000...5000 K color temperature.
+    * - ``V4L2_WHITE_BALANCE_FLUORESCENT_H``
+      - With this setting the camera will compensate for fluorescent H
+	lighting.
+    * - ``V4L2_WHITE_BALANCE_HORIZON``
+      - White balance setting for horizon daylight. It corresponds
+	approximately to 5000 K color temperature.
+    * - ``V4L2_WHITE_BALANCE_DAYLIGHT``
+      - White balance preset for daylight (with clear sky). It corresponds
+	approximately to 5000...6500 K color temperature.
+    * - ``V4L2_WHITE_BALANCE_FLASH``
+      - With this setting the camera will compensate for the flash light.
+	It slightly warms up the colors and corresponds roughly to
+	5000...5500 K color temperature.
+    * - ``V4L2_WHITE_BALANCE_CLOUDY``
+      - White balance preset for moderately overcast sky. This option
+	corresponds approximately to 6500...8000 K color temperature
+	range.
+    * - ``V4L2_WHITE_BALANCE_SHADE``
+      - White balance preset for shade or heavily overcast sky. It
+	corresponds approximately to 9000...10000 K color temperature.
+
+
+
+.. _v4l2-wide-dynamic-range:
+
+``V4L2_CID_WIDE_DYNAMIC_RANGE (boolean)``
+    Enables or disables the camera's wide dynamic range feature. This
+    feature allows to obtain clear images in situations where intensity
+    of the illumination varies significantly throughout the scene, i.e.
+    there are simultaneously very dark and very bright areas. It is most
+    commonly realized in cameras by combining two subsequent frames with
+    different exposure times.  [#f1]_
+
+.. _v4l2-image-stabilization:
+
+``V4L2_CID_IMAGE_STABILIZATION (boolean)``
+    Enables or disables image stabilization.
+
+``V4L2_CID_ISO_SENSITIVITY (integer menu)``
+    Determines ISO equivalent of an image sensor indicating the sensor's
+    sensitivity to light. The numbers are expressed in arithmetic scale,
+    as per :ref:`iso12232` standard, where doubling the sensor
+    sensitivity is represented by doubling the numerical ISO value.
+    Applications should interpret the values as standard ISO values
+    multiplied by 1000, e.g. control value 800 stands for ISO 0.8.
+    Drivers will usually support only a subset of standard ISO values.
+    The effect of setting this control while the
+    ``V4L2_CID_ISO_SENSITIVITY_AUTO`` control is set to a value other
+    than ``V4L2_CID_ISO_SENSITIVITY_MANUAL`` is undefined, drivers
+    should ignore such requests.
+
+.. _v4l2-iso-sensitivity-auto-type:
+
+``V4L2_CID_ISO_SENSITIVITY_AUTO``
+    (enum)
+
+enum v4l2_iso_sensitivity_type -
+    Enables or disables automatic ISO sensitivity adjustments.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_CID_ISO_SENSITIVITY_MANUAL``
+      - Manual ISO sensitivity.
+    * - ``V4L2_CID_ISO_SENSITIVITY_AUTO``
+      - Automatic ISO sensitivity adjustments.
+
+
+
+.. _v4l2-scene-mode:
+
+``V4L2_CID_SCENE_MODE``
+    (enum)
+
+enum v4l2_scene_mode -
+    This control allows to select scene programs as the camera automatic
+    modes optimized for common shooting scenes. Within these modes the
+    camera determines best exposure, aperture, focusing, light metering,
+    white balance and equivalent sensitivity. The controls of those
+    parameters are influenced by the scene mode control. An exact
+    behavior in each mode is subject to the camera specification.
+
+    When the scene mode feature is not used, this control should be set
+    to ``V4L2_SCENE_MODE_NONE`` to make sure the other possibly related
+    controls are accessible. The following scene programs are defined:
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{5.9cm}|p{11.5cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_SCENE_MODE_NONE``
+      - The scene mode feature is disabled.
+    * - ``V4L2_SCENE_MODE_BACKLIGHT``
+      - Backlight. Compensates for dark shadows when light is coming from
+	behind a subject, also by automatically turning on the flash.
+    * - ``V4L2_SCENE_MODE_BEACH_SNOW``
+      - Beach and snow. This mode compensates for all-white or bright
+	scenes, which tend to look gray and low contrast, when camera's
+	automatic exposure is based on an average scene brightness. To
+	compensate, this mode automatically slightly overexposes the
+	frames. The white balance may also be adjusted to compensate for
+	the fact that reflected snow looks bluish rather than white.
+    * - ``V4L2_SCENE_MODE_CANDLELIGHT``
+      - Candle light. The camera generally raises the ISO sensitivity and
+	lowers the shutter speed. This mode compensates for relatively
+	close subject in the scene. The flash is disabled in order to
+	preserve the ambiance of the light.
+    * - ``V4L2_SCENE_MODE_DAWN_DUSK``
+      - Dawn and dusk. Preserves the colors seen in low natural light
+	before dusk and after down. The camera may turn off the flash, and
+	automatically focus at infinity. It will usually boost saturation
+	and lower the shutter speed.
+    * - ``V4L2_SCENE_MODE_FALL_COLORS``
+      - Fall colors. Increases saturation and adjusts white balance for
+	color enhancement. Pictures of autumn leaves get saturated reds
+	and yellows.
+    * - ``V4L2_SCENE_MODE_FIREWORKS``
+      - Fireworks. Long exposure times are used to capture the expanding
+	burst of light from a firework. The camera may invoke image
+	stabilization.
+    * - ``V4L2_SCENE_MODE_LANDSCAPE``
+      - Landscape. The camera may choose a small aperture to provide deep
+	depth of field and long exposure duration to help capture detail
+	in dim light conditions. The focus is fixed at infinity. Suitable
+	for distant and wide scenery.
+    * - ``V4L2_SCENE_MODE_NIGHT``
+      - Night, also known as Night Landscape. Designed for low light
+	conditions, it preserves detail in the dark areas without blowing
+	out bright objects. The camera generally sets itself to a
+	medium-to-high ISO sensitivity, with a relatively long exposure
+	time, and turns flash off. As such, there will be increased image
+	noise and the possibility of blurred image.
+    * - ``V4L2_SCENE_MODE_PARTY_INDOOR``
+      - Party and indoor. Designed to capture indoor scenes that are lit
+	by indoor background lighting as well as the flash. The camera
+	usually increases ISO sensitivity, and adjusts exposure for the
+	low light conditions.
+    * - ``V4L2_SCENE_MODE_PORTRAIT``
+      - Portrait. The camera adjusts the aperture so that the depth of
+	field is reduced, which helps to isolate the subject against a
+	smooth background. Most cameras recognize the presence of faces in
+	the scene and focus on them. The color hue is adjusted to enhance
+	skin tones. The intensity of the flash is often reduced.
+    * - ``V4L2_SCENE_MODE_SPORTS``
+      - Sports. Significantly increases ISO and uses a fast shutter speed
+	to freeze motion of rapidly-moving subjects. Increased image noise
+	may be seen in this mode.
+    * - ``V4L2_SCENE_MODE_SUNSET``
+      - Sunset. Preserves deep hues seen in sunsets and sunrises. It bumps
+	up the saturation.
+    * - ``V4L2_SCENE_MODE_TEXT``
+      - Text. It applies extra contrast and sharpness, it is typically a
+	black-and-white mode optimized for readability. Automatic focus
+	may be switched to close-up mode and this setting may also involve
+	some lens-distortion correction.
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_3A_LOCK (bitmask)``
+    This control locks or unlocks the automatic focus, exposure and
+    white balance. The automatic adjustments can be paused independently
+    by setting the corresponding lock bit to 1. The camera then retains
+    the settings until the lock bit is cleared. The following lock bits
+    are defined:
+
+    When a given algorithm is not enabled, drivers should ignore
+    requests to lock it and should return no error. An example might be
+    an application setting bit ``V4L2_LOCK_WHITE_BALANCE`` when the
+    ``V4L2_CID_AUTO_WHITE_BALANCE`` control is set to ``FALSE``. The
+    value of this control may be changed by exposure, white balance or
+    focus controls.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_LOCK_EXPOSURE``
+      - Automatic exposure adjustments lock.
+    * - ``V4L2_LOCK_WHITE_BALANCE``
+      - Automatic white balance adjustments lock.
+    * - ``V4L2_LOCK_FOCUS``
+      - Automatic focus lock.
+
+
+
+``V4L2_CID_PAN_SPEED (integer)``
+    This control turns the camera horizontally at the specific speed.
+    The unit is undefined. A positive value moves the camera to the
+    right (clockwise when viewed from above), a negative value to the
+    left. A value of zero stops the motion if one is in progress and has
+    no effect otherwise.
+
+``V4L2_CID_TILT_SPEED (integer)``
+    This control turns the camera vertically at the specified speed. The
+    unit is undefined. A positive value moves the camera up, a negative
+    value down. A value of zero stops the motion if one is in progress
+    and has no effect otherwise.
+
+``V4L2_CID_CAMERA_ORIENTATION (menu)``
+    This read-only control describes the camera orientation by reporting its
+    mounting position on the device where the camera is installed. The control
+    value is constant and not modifiable by software. This control is
+    particularly meaningful for devices which have a well defined orientation,
+    such as phones, laptops and portable devices since the control is expressed
+    as a position relative to the device's intended usage orientation. For
+    example, a camera installed on the user-facing side of a phone, a tablet or
+    a laptop device is said to be have ``V4L2_CAMERA_ORIENTATION_FRONT``
+    orientation, while a camera installed on the opposite side of the front one
+    is said to be have ``V4L2_CAMERA_ORIENTATION_BACK`` orientation. Camera
+    sensors not directly attached to the device, or attached in a way that
+    allows them to move freely, such as webcams and digital cameras, are said to
+    have the ``V4L2_CAMERA_ORIENTATION_EXTERNAL`` orientation.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_CAMERA_ORIENTATION_FRONT``
+      - The camera is oriented towards the user facing side of the device.
+    * - ``V4L2_CAMERA_ORIENTATION_BACK``
+      - The camera is oriented towards the back facing side of the device.
+    * - ``V4L2_CAMERA_ORIENTATION_EXTERNAL``
+      - The camera is not directly attached to the device and is freely movable.
+
+
+
+``V4L2_CID_CAMERA_SENSOR_ROTATION (integer)``
+    This read-only control describes the rotation correction in degrees in the
+    counter-clockwise direction to be applied to the captured images once
+    captured to memory to compensate for the camera sensor mounting rotation.
+
+    For a precise definition of the sensor mounting rotation refer to the
+    extensive description of the 'rotation' properties in the device tree
+    bindings file 'video-interfaces.txt'.
+
+    A few examples are below reported, using a shark swimming from left to
+    right in front of the user as the example scene to capture. ::
+
+                 0               X-axis
+               0 +------------------------------------->
+                 !
+                 !
+                 !
+                 !           |\____)\___
+                 !           ) _____  __`<
+                 !           |/     )/
+                 !
+                 !
+                 !
+                 V
+               Y-axis
+
+    Example one - Webcam
+
+    Assuming you can bring your laptop with you while swimming with sharks,
+    the camera module of the laptop is installed on the user facing part of a
+    laptop screen casing, and is typically used for video calls. The captured
+    images are meant to be displayed in landscape mode (width > height) on the
+    laptop screen.
+
+    The camera is typically mounted upside-down to compensate the lens optical
+    inversion effect. In this case the value of the
+    V4L2_CID_CAMERA_SENSOR_ROTATION control is 0, no rotation is required to
+    display images correctly to the user.
+
+    If the camera sensor is not mounted upside-down it is required to compensate
+    the lens optical inversion effect and the value of the
+    V4L2_CID_CAMERA_SENSOR_ROTATION control is 180 degrees, as images will
+    result rotated when captured to memory. ::
+
+                 +--------------------------------------+
+                 !                                      !
+                 !                                      !
+                 !                                      !
+                 !              __/(_____/|             !
+                 !            >.___  ____ (             !
+                 !                 \(    \|             !
+                 !                                      !
+                 !                                      !
+                 !                                      !
+                 +--------------------------------------+
+
+    A software rotation correction of 180 degrees has to be applied to correctly
+    display the image on the user screen. ::
+
+                 +--------------------------------------+
+                 !                                      !
+                 !                                      !
+                 !                                      !
+                 !             |\____)\___              !
+                 !             ) _____  __`<            !
+                 !             |/     )/                !
+                 !                                      !
+                 !                                      !
+                 !                                      !
+                 +--------------------------------------+
+
+    Example two - Phone camera
+
+    It is more handy to go and swim with sharks with only your mobile phone
+    with you and take pictures with the camera that is installed on the back
+    side of the device, facing away from the user. The captured images are meant
+    to be displayed in portrait mode (height > width) to match the device screen
+    orientation and the device usage orientation used when taking the picture.
+
+    The camera sensor is typically mounted with its pixel array longer side
+    aligned to the device longer side, upside-down mounted to compensate for
+    the lens optical inversion effect.
+
+    The images once captured to memory will be rotated and the value of the
+    V4L2_CID_CAMERA_SENSOR_ROTATION will report a 90 degree rotation. ::
+
+
+                 +-------------------------------------+
+                 |                 _ _                 |
+                 |                \   /                |
+                 |                 | |                 |
+                 |                 | |                 |
+                 |                 |  >                |
+                 |                <  |                 |
+                 |                 | |                 |
+                 |                   .                 |
+                 |                  V                  |
+                 +-------------------------------------+
+
+    A correction of 90 degrees in counter-clockwise direction has to be
+    applied to correctly display the image in portrait mode on the device
+    screen. ::
+
+                          +--------------------+
+                          |                    |
+                          |                    |
+                          |                    |
+                          |                    |
+                          |                    |
+                          |                    |
+                          |   |\____)\___      |
+                          |   ) _____  __`<    |
+                          |   |/     )/        |
+                          |                    |
+                          |                    |
+                          |                    |
+                          |                    |
+                          |                    |
+                          +--------------------+
+
+
+.. [#f1]
+   This control may be changed to a menu control in the future, if more
+   options are required.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
new file mode 100644
index 000000000..b864869b4
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -0,0 +1,4387 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _mpeg-controls:
+
+***********************
+Codec Control Reference
+***********************
+
+Below all controls within the Codec control class are described. First
+the generic controls, then controls specific for certain hardware.
+
+.. note::
+
+   These controls are applicable to all codecs and not just MPEG. The
+   defines are prefixed with V4L2_CID_MPEG/V4L2_MPEG as the controls
+   were originally made for MPEG codecs and later extended to cover all
+   encoding formats.
+
+
+Generic Codec Controls
+======================
+
+
+.. _mpeg-control-id:
+
+Codec Control IDs
+-----------------
+
+``V4L2_CID_MPEG_CLASS (class)``
+    The Codec class descriptor. Calling
+    :ref:`VIDIOC_QUERYCTRL` for this control will
+    return a description of this control class. This description can be
+    used as the caption of a Tab page in a GUI, for example.
+
+.. _v4l2-mpeg-stream-type:
+
+``V4L2_CID_MPEG_STREAM_TYPE``
+    (enum)
+
+enum v4l2_mpeg_stream_type -
+    The MPEG-1, -2 or -4 output stream type. One cannot assume anything
+    here. Each hardware MPEG encoder tends to support different subsets
+    of the available MPEG stream types. This control is specific to
+    multiplexed MPEG streams. The currently defined stream types are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_PS``
+      - MPEG-2 program stream
+    * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_TS``
+      - MPEG-2 transport stream
+    * - ``V4L2_MPEG_STREAM_TYPE_MPEG1_SS``
+      - MPEG-1 system stream
+    * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_DVD``
+      - MPEG-2 DVD-compatible stream
+    * - ``V4L2_MPEG_STREAM_TYPE_MPEG1_VCD``
+      - MPEG-1 VCD-compatible stream
+    * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD``
+      - MPEG-2 SVCD-compatible stream
+
+
+
+``V4L2_CID_MPEG_STREAM_PID_PMT (integer)``
+    Program Map Table Packet ID for the MPEG transport stream (default
+    16)
+
+``V4L2_CID_MPEG_STREAM_PID_AUDIO (integer)``
+    Audio Packet ID for the MPEG transport stream (default 256)
+
+``V4L2_CID_MPEG_STREAM_PID_VIDEO (integer)``
+    Video Packet ID for the MPEG transport stream (default 260)
+
+``V4L2_CID_MPEG_STREAM_PID_PCR (integer)``
+    Packet ID for the MPEG transport stream carrying PCR fields (default
+    259)
+
+``V4L2_CID_MPEG_STREAM_PES_ID_AUDIO (integer)``
+    Audio ID for MPEG PES
+
+``V4L2_CID_MPEG_STREAM_PES_ID_VIDEO (integer)``
+    Video ID for MPEG PES
+
+.. _v4l2-mpeg-stream-vbi-fmt:
+
+``V4L2_CID_MPEG_STREAM_VBI_FMT``
+    (enum)
+
+enum v4l2_mpeg_stream_vbi_fmt -
+    Some cards can embed VBI data (e. g. Closed Caption, Teletext) into
+    the MPEG stream. This control selects whether VBI data should be
+    embedded, and if so, what embedding method should be used. The list
+    of possible VBI formats depends on the driver. The currently defined
+    VBI format types are:
+
+
+
+.. tabularcolumns:: |p{6.6 cm}|p{10.9cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_STREAM_VBI_FMT_NONE``
+      - No VBI in the MPEG stream
+    * - ``V4L2_MPEG_STREAM_VBI_FMT_IVTV``
+      - VBI in private packets, IVTV format (documented in the kernel
+	sources in the file
+	``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst``)
+
+
+
+.. _v4l2-mpeg-audio-sampling-freq:
+
+``V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ``
+    (enum)
+
+enum v4l2_mpeg_audio_sampling_freq -
+    MPEG Audio sampling frequency. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100``
+      - 44.1 kHz
+    * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000``
+      - 48 kHz
+    * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000``
+      - 32 kHz
+
+
+
+.. _v4l2-mpeg-audio-encoding:
+
+``V4L2_CID_MPEG_AUDIO_ENCODING``
+    (enum)
+
+enum v4l2_mpeg_audio_encoding -
+    MPEG Audio encoding. This control is specific to multiplexed MPEG
+    streams. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_1``
+      - MPEG-1/2 Layer I encoding
+    * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_2``
+      - MPEG-1/2 Layer II encoding
+    * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_3``
+      - MPEG-1/2 Layer III encoding
+    * - ``V4L2_MPEG_AUDIO_ENCODING_AAC``
+      - MPEG-2/4 AAC (Advanced Audio Coding)
+    * - ``V4L2_MPEG_AUDIO_ENCODING_AC3``
+      - AC-3 aka ATSC A/52 encoding
+
+
+
+.. _v4l2-mpeg-audio-l1-bitrate:
+
+``V4L2_CID_MPEG_AUDIO_L1_BITRATE``
+    (enum)
+
+enum v4l2_mpeg_audio_l1_bitrate -
+    MPEG-1/2 Layer I bitrate. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_32K``
+      - 32 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_64K``
+      - 64 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_96K``
+      - 96 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_128K``
+      - 128 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_160K``
+      - 160 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_192K``
+      - 192 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_224K``
+      - 224 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_256K``
+      - 256 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_288K``
+      - 288 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_320K``
+      - 320 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_352K``
+      - 352 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_384K``
+      - 384 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_416K``
+      - 416 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L1_BITRATE_448K``
+      - 448 kbit/s
+
+
+
+.. _v4l2-mpeg-audio-l2-bitrate:
+
+``V4L2_CID_MPEG_AUDIO_L2_BITRATE``
+    (enum)
+
+enum v4l2_mpeg_audio_l2_bitrate -
+    MPEG-1/2 Layer II bitrate. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_32K``
+      - 32 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_48K``
+      - 48 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_56K``
+      - 56 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_64K``
+      - 64 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_80K``
+      - 80 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_96K``
+      - 96 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_112K``
+      - 112 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_128K``
+      - 128 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_160K``
+      - 160 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_192K``
+      - 192 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_224K``
+      - 224 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_256K``
+      - 256 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_320K``
+      - 320 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L2_BITRATE_384K``
+      - 384 kbit/s
+
+
+
+.. _v4l2-mpeg-audio-l3-bitrate:
+
+``V4L2_CID_MPEG_AUDIO_L3_BITRATE``
+    (enum)
+
+enum v4l2_mpeg_audio_l3_bitrate -
+    MPEG-1/2 Layer III bitrate. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_32K``
+      - 32 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_40K``
+      - 40 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_48K``
+      - 48 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_56K``
+      - 56 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_64K``
+      - 64 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_80K``
+      - 80 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_96K``
+      - 96 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_112K``
+      - 112 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_128K``
+      - 128 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_160K``
+      - 160 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_192K``
+      - 192 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_224K``
+      - 224 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_256K``
+      - 256 kbit/s
+    * - ``V4L2_MPEG_AUDIO_L3_BITRATE_320K``
+      - 320 kbit/s
+
+
+
+``V4L2_CID_MPEG_AUDIO_AAC_BITRATE (integer)``
+    AAC bitrate in bits per second.
+
+.. _v4l2-mpeg-audio-ac3-bitrate:
+
+``V4L2_CID_MPEG_AUDIO_AC3_BITRATE``
+    (enum)
+
+enum v4l2_mpeg_audio_ac3_bitrate -
+    AC-3 bitrate. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_32K``
+      - 32 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_40K``
+      - 40 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_48K``
+      - 48 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_56K``
+      - 56 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_64K``
+      - 64 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_80K``
+      - 80 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_96K``
+      - 96 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_112K``
+      - 112 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_128K``
+      - 128 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_160K``
+      - 160 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_192K``
+      - 192 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_224K``
+      - 224 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_256K``
+      - 256 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_320K``
+      - 320 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_384K``
+      - 384 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_448K``
+      - 448 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_512K``
+      - 512 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_576K``
+      - 576 kbit/s
+    * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_640K``
+      - 640 kbit/s
+
+
+
+.. _v4l2-mpeg-audio-mode:
+
+``V4L2_CID_MPEG_AUDIO_MODE``
+    (enum)
+
+enum v4l2_mpeg_audio_mode -
+    MPEG Audio mode. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_MODE_STEREO``
+      - Stereo
+    * - ``V4L2_MPEG_AUDIO_MODE_JOINT_STEREO``
+      - Joint Stereo
+    * - ``V4L2_MPEG_AUDIO_MODE_DUAL``
+      - Bilingual
+    * - ``V4L2_MPEG_AUDIO_MODE_MONO``
+      - Mono
+
+
+
+.. _v4l2-mpeg-audio-mode-extension:
+
+``V4L2_CID_MPEG_AUDIO_MODE_EXTENSION``
+    (enum)
+
+enum v4l2_mpeg_audio_mode_extension -
+    Joint Stereo audio mode extension. In Layer I and II they indicate
+    which subbands are in intensity stereo. All other subbands are coded
+    in stereo. Layer III is not (yet) supported. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4``
+      - Subbands 4-31 in intensity stereo
+    * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_8``
+      - Subbands 8-31 in intensity stereo
+    * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_12``
+      - Subbands 12-31 in intensity stereo
+    * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16``
+      - Subbands 16-31 in intensity stereo
+
+
+
+.. _v4l2-mpeg-audio-emphasis:
+
+``V4L2_CID_MPEG_AUDIO_EMPHASIS``
+    (enum)
+
+enum v4l2_mpeg_audio_emphasis -
+    Audio Emphasis. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_EMPHASIS_NONE``
+      - None
+    * - ``V4L2_MPEG_AUDIO_EMPHASIS_50_DIV_15_uS``
+      - 50/15 microsecond emphasis
+    * - ``V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17``
+      - CCITT J.17
+
+
+
+.. _v4l2-mpeg-audio-crc:
+
+``V4L2_CID_MPEG_AUDIO_CRC``
+    (enum)
+
+enum v4l2_mpeg_audio_crc -
+    CRC method. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_CRC_NONE``
+      - None
+    * - ``V4L2_MPEG_AUDIO_CRC_CRC16``
+      - 16 bit parity check
+
+
+
+``V4L2_CID_MPEG_AUDIO_MUTE (boolean)``
+    Mutes the audio when capturing. This is not done by muting audio
+    hardware, which can still produce a slight hiss, but in the encoder
+    itself, guaranteeing a fixed and reproducible audio bitstream. 0 =
+    unmuted, 1 = muted.
+
+.. _v4l2-mpeg-audio-dec-playback:
+
+``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK``
+    (enum)
+
+enum v4l2_mpeg_audio_dec_playback -
+    Determines how monolingual audio should be played back. Possible
+    values are:
+
+
+
+.. tabularcolumns:: |p{9.8cm}|p{7.7cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_AUTO``
+      - Automatically determines the best playback mode.
+    * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_STEREO``
+      - Stereo playback.
+    * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_LEFT``
+      - Left channel playback.
+    * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_RIGHT``
+      - Right channel playback.
+    * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_MONO``
+      - Mono playback.
+    * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_SWAPPED_STEREO``
+      - Stereo playback with swapped left and right channels.
+
+
+
+.. _v4l2-mpeg-audio-dec-multilingual-playback:
+
+``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK``
+    (enum)
+
+enum v4l2_mpeg_audio_dec_playback -
+    Determines how multilingual audio should be played back.
+
+.. _v4l2-mpeg-video-encoding:
+
+``V4L2_CID_MPEG_VIDEO_ENCODING``
+    (enum)
+
+enum v4l2_mpeg_video_encoding -
+    MPEG Video encoding method. This control is specific to multiplexed
+    MPEG streams. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_1``
+      - MPEG-1 Video encoding
+    * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_2``
+      - MPEG-2 Video encoding
+    * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC``
+      - MPEG-4 AVC (H.264) Video encoding
+
+
+
+.. _v4l2-mpeg-video-aspect:
+
+``V4L2_CID_MPEG_VIDEO_ASPECT``
+    (enum)
+
+enum v4l2_mpeg_video_aspect -
+    Video aspect. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_ASPECT_1x1``
+    * - ``V4L2_MPEG_VIDEO_ASPECT_4x3``
+    * - ``V4L2_MPEG_VIDEO_ASPECT_16x9``
+    * - ``V4L2_MPEG_VIDEO_ASPECT_221x100``
+
+
+
+``V4L2_CID_MPEG_VIDEO_B_FRAMES (integer)``
+    Number of B-Frames (default 2)
+
+``V4L2_CID_MPEG_VIDEO_GOP_SIZE (integer)``
+    GOP size (default 12)
+
+``V4L2_CID_MPEG_VIDEO_GOP_CLOSURE (boolean)``
+    GOP closure (default 1)
+
+``V4L2_CID_MPEG_VIDEO_PULLDOWN (boolean)``
+    Enable 3:2 pulldown (default 0)
+
+.. _v4l2-mpeg-video-bitrate-mode:
+
+``V4L2_CID_MPEG_VIDEO_BITRATE_MODE``
+    (enum)
+
+enum v4l2_mpeg_video_bitrate_mode -
+    Video bitrate mode. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_VBR``
+      - Variable bitrate
+    * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CBR``
+      - Constant bitrate
+    * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ``
+      - Constant quality
+
+
+
+``V4L2_CID_MPEG_VIDEO_BITRATE (integer)``
+    Video bitrate in bits per second.
+
+``V4L2_CID_MPEG_VIDEO_BITRATE_PEAK (integer)``
+    Peak video bitrate in bits per second. Must be larger or equal to
+    the average video bitrate. It is ignored if the video bitrate mode
+    is set to constant bitrate.
+
+``V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY (integer)``
+    Constant quality level control. This control is applicable when
+    ``V4L2_CID_MPEG_VIDEO_BITRATE_MODE`` value is
+    ``V4L2_MPEG_VIDEO_BITRATE_MODE_CQ``. Valid range is 1 to 100
+    where 1 indicates lowest quality and 100 indicates highest quality.
+    Encoder will decide the appropriate quantization parameter and
+    bitrate to produce requested frame quality.
+
+
+``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE (enum)``
+
+enum v4l2_mpeg_video_frame_skip_mode -
+    Indicates in what conditions the encoder should skip frames. If
+    encoding a frame would cause the encoded stream to be larger then a
+    chosen data limit then the frame will be skipped. Possible values
+    are:
+
+
+.. tabularcolumns:: |p{9.2cm}|p{8.3cm}|
+
+.. raw:: latex
+
+    \small
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_FRAME_SKIP_MODE_DISABLED``
+      - Frame skip mode is disabled.
+    * - ``V4L2_MPEG_FRAME_SKIP_MODE_LEVEL_LIMIT``
+      - Frame skip mode enabled and buffer limit is set by the chosen
+        level and is defined by the standard.
+    * - ``V4L2_MPEG_FRAME_SKIP_MODE_BUF_LIMIT``
+      - Frame skip mode enabled and buffer limit is set by the
+        :ref:`VBV (MPEG1/2/4) <v4l2-mpeg-video-vbv-size>` or
+        :ref:`CPB (H264) buffer size <v4l2-mpeg-video-h264-cpb-size>` control.
+
+.. raw:: latex
+
+    \normalsize
+
+``V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION (integer)``
+    For every captured frame, skip this many subsequent frames (default
+    0).
+
+``V4L2_CID_MPEG_VIDEO_MUTE (boolean)``
+    "Mutes" the video to a fixed color when capturing. This is useful
+    for testing, to produce a fixed video bitstream. 0 = unmuted, 1 =
+    muted.
+
+``V4L2_CID_MPEG_VIDEO_MUTE_YUV (integer)``
+    Sets the "mute" color of the video. The supplied 32-bit integer is
+    interpreted as follows (bit 0 = least significant bit):
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Bit 0:7
+      - V chrominance information
+    * - Bit 8:15
+      - U chrominance information
+    * - Bit 16:23
+      - Y luminance information
+    * - Bit 24:31
+      - Must be zero.
+
+
+
+.. _v4l2-mpeg-video-dec-pts:
+
+``V4L2_CID_MPEG_VIDEO_DEC_PTS (integer64)``
+    This read-only control returns the 33-bit video Presentation Time
+    Stamp as defined in ITU T-REC-H.222.0 and ISO/IEC 13818-1 of the
+    currently displayed frame. This is the same PTS as is used in
+    :ref:`VIDIOC_DECODER_CMD`.
+
+.. _v4l2-mpeg-video-dec-frame:
+
+``V4L2_CID_MPEG_VIDEO_DEC_FRAME (integer64)``
+    This read-only control returns the frame counter of the frame that
+    is currently displayed (decoded). This value is reset to 0 whenever
+    the decoder is started.
+
+``V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE (boolean)``
+    If enabled the decoder expects to receive a single slice per buffer,
+    otherwise the decoder expects a single frame in per buffer.
+    Applicable to the decoder, all codecs.
+
+``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
+    Enable writing sample aspect ratio in the Video Usability
+    Information. Applicable to the H264 encoder.
+
+.. _v4l2-mpeg-video-h264-vui-sar-idc:
+
+``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC``
+    (enum)
+
+enum v4l2_mpeg_video_h264_vui_sar_idc -
+    VUI sample aspect ratio indicator for H.264 encoding. The value is
+    defined in the table E-1 in the standard. Applicable to the H264
+    encoder.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_UNSPECIFIED``
+      - Unspecified
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1``
+      - 1x1
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_12x11``
+      - 12x11
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_10x11``
+      - 10x11
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_16x11``
+      - 16x11
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_40x33``
+      - 40x33
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_24x11``
+      - 24x11
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_20x11``
+      - 20x11
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_32x11``
+      - 32x11
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_80x33``
+      - 80x33
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_18x11``
+      - 18x11
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_15x11``
+      - 15x11
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_64x33``
+      - 64x33
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_160x99``
+      - 160x99
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_4x3``
+      - 4x3
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_3x2``
+      - 3x2
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_2x1``
+      - 2x1
+    * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_EXTENDED``
+      - Extended SAR
+
+
+
+``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH (integer)``
+    Extended sample aspect ratio width for H.264 VUI encoding.
+    Applicable to the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT (integer)``
+    Extended sample aspect ratio height for H.264 VUI encoding.
+    Applicable to the H264 encoder.
+
+.. _v4l2-mpeg-video-h264-level:
+
+``V4L2_CID_MPEG_VIDEO_H264_LEVEL``
+    (enum)
+
+enum v4l2_mpeg_video_h264_level -
+    The level information for the H264 video elementary stream.
+    Applicable to the H264 encoder. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_0``
+      - Level 1.0
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1B``
+      - Level 1B
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_1``
+      - Level 1.1
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_2``
+      - Level 1.2
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_3``
+      - Level 1.3
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_0``
+      - Level 2.0
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_1``
+      - Level 2.1
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_2``
+      - Level 2.2
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_0``
+      - Level 3.0
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_1``
+      - Level 3.1
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_2``
+      - Level 3.2
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_0``
+      - Level 4.0
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_1``
+      - Level 4.1
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_2``
+      - Level 4.2
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_0``
+      - Level 5.0
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_1``
+      - Level 5.1
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_2``
+      - Level 5.2
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_0``
+      - Level 6.0
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_1``
+      - Level 6.1
+    * - ``V4L2_MPEG_VIDEO_H264_LEVEL_6_2``
+      - Level 6.2
+
+
+
+.. _v4l2-mpeg-video-mpeg2-level:
+
+``V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL``
+    (enum)
+
+enum v4l2_mpeg_video_mpeg2_level -
+    The level information for the MPEG2 elementary stream. Applicable to
+    MPEG2 codecs. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_LOW``
+      - Low Level (LL)
+    * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_MAIN``
+      - Main Level (ML)
+    * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH_1440``
+      - High-1440 Level (H-14)
+    * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH``
+      - High Level (HL)
+
+
+
+.. _v4l2-mpeg-video-mpeg4-level:
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL``
+    (enum)
+
+enum v4l2_mpeg_video_mpeg4_level -
+    The level information for the MPEG4 elementary stream. Applicable to
+    the MPEG4 encoder. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0``
+      - Level 0
+    * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B``
+      - Level 0b
+    * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_1``
+      - Level 1
+    * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_2``
+      - Level 2
+    * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3``
+      - Level 3
+    * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3B``
+      - Level 3b
+    * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_4``
+      - Level 4
+    * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_5``
+      - Level 5
+
+
+
+.. _v4l2-mpeg-video-h264-profile:
+
+``V4L2_CID_MPEG_VIDEO_H264_PROFILE``
+    (enum)
+
+enum v4l2_mpeg_video_h264_profile -
+    The profile information for H264. Applicable to the H264 encoder.
+    Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE``
+      - Baseline profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE``
+      - Constrained Baseline profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_MAIN``
+      - Main profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED``
+      - Extended profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH``
+      - High profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10``
+      - High 10 profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422``
+      - High 422 profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_PREDICTIVE``
+      - High 444 Predictive profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10_INTRA``
+      - High 10 Intra profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422_INTRA``
+      - High 422 Intra profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_INTRA``
+      - High 444 Intra profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CAVLC_444_INTRA``
+      - CAVLC 444 Intra profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_BASELINE``
+      - Scalable Baseline profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH``
+      - Scalable High profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH_INTRA``
+      - Scalable High Intra profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH``
+      - Stereo High profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_MULTIVIEW_HIGH``
+      - Multiview High profile
+    * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_HIGH``
+      - Constrained High profile
+
+
+
+.. _v4l2-mpeg-video-mpeg2-profile:
+
+``V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE``
+    (enum)
+
+enum v4l2_mpeg_video_mpeg2_profile -
+    The profile information for MPEG2. Applicable to MPEG2 codecs.
+    Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SIMPLE``
+      - Simple profile (SP)
+    * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MAIN``
+      - Main profile (MP)
+    * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SNR_SCALABLE``
+      - SNR Scalable profile (SNR)
+    * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SPATIALLY_SCALABLE``
+      - Spatially Scalable profile (Spt)
+    * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH``
+      - High profile (HP)
+    * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MULTIVIEW``
+      - Multi-view profile (MVP)
+
+
+
+.. _v4l2-mpeg-video-mpeg4-profile:
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE``
+    (enum)
+
+enum v4l2_mpeg_video_mpeg4_profile -
+    The profile information for MPEG4. Applicable to the MPEG4 encoder.
+    Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE``
+      - Simple profile
+    * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_SIMPLE``
+      - Advanced Simple profile
+    * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_CORE``
+      - Core profile
+    * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE_SCALABLE``
+      - Simple Scalable profile
+    * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY``
+      -
+
+
+
+``V4L2_CID_MPEG_VIDEO_MAX_REF_PIC (integer)``
+    The maximum number of reference pictures used for encoding.
+    Applicable to the encoder.
+
+.. _v4l2-mpeg-video-multi-slice-mode:
+
+``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE``
+    (enum)
+
+enum v4l2_mpeg_video_multi_slice_mode -
+    Determines how the encoder should handle division of frame into
+    slices. Applicable to the encoder. Possible values are:
+
+
+
+.. tabularcolumns:: |p{9.6cm}|p{7.9cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE``
+      - Single slice per frame.
+    * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``
+      - Multiple slices with set maximum number of macroblocks per slice.
+    * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``
+      - Multiple slice with set maximum size in bytes per slice.
+
+
+
+``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB (integer)``
+    The maximum number of macroblocks in a slice. Used when
+    ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to
+    ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``. Applicable to the
+    encoder.
+
+``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES (integer)``
+    The maximum size of a slice in bytes. Used when
+    ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to
+    ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``. Applicable to the
+    encoder.
+
+.. _v4l2-mpeg-video-h264-loop-filter-mode:
+
+``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE``
+    (enum)
+
+enum v4l2_mpeg_video_h264_loop_filter_mode -
+    Loop filter mode for H264 encoder. Possible values are:
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{13.6cm}|p{3.9cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED``
+      - Loop filter is enabled.
+    * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED``
+      - Loop filter is disabled.
+    * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY``
+      - Loop filter is disabled at the slice boundary.
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA (integer)``
+    Loop filter alpha coefficient, defined in the H264 standard.
+    This value corresponds to the slice_alpha_c0_offset_div2 slice header
+    field, and should be in the range of -6 to +6, inclusive. The actual alpha
+    offset FilterOffsetA is twice this value.
+    Applicable to the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA (integer)``
+    Loop filter beta coefficient, defined in the H264 standard.
+    This corresponds to the slice_beta_offset_div2 slice header field, and
+    should be in the range of -6 to +6, inclusive. The actual beta offset
+    FilterOffsetB is twice this value.
+    Applicable to the H264 encoder.
+
+.. _v4l2-mpeg-video-h264-entropy-mode:
+
+``V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE``
+    (enum)
+
+enum v4l2_mpeg_video_h264_entropy_mode -
+    Entropy coding mode for H264 - CABAC/CAVALC. Applicable to the H264
+    encoder. Possible values are:
+
+
+.. tabularcolumns:: |p{9.0cm}|p{8.5cm}|
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CAVLC``
+      - Use CAVLC entropy coding.
+    * - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC``
+      - Use CABAC entropy coding.
+
+
+
+``V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM (boolean)``
+    Enable 8X8 transform for H264. Applicable to the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION (boolean)``
+    Enable constrained intra prediction for H264. Applicable to the H264
+    encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET (integer)``
+    Specify the offset that should be added to the luma quantization
+    parameter to determine the chroma quantization parameter. Applicable
+    to the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB (integer)``
+    Cyclic intra macroblock refresh. This is the number of continuous
+    macroblocks refreshed every frame. Each frame a successive set of
+    macroblocks is refreshed until the cycle completes and starts from
+    the top of the frame. Applicable to H264, H263 and MPEG4 encoder.
+
+``V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE (boolean)``
+    Frame level rate control enable. If this control is disabled then
+    the quantization parameter for each frame type is constant and set
+    with appropriate controls (e.g.
+    ``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP``). If frame rate control is
+    enabled then quantization parameter is adjusted to meet the chosen
+    bitrate. Minimum and maximum value for the quantization parameter
+    can be set with appropriate controls (e.g.
+    ``V4L2_CID_MPEG_VIDEO_H263_MIN_QP``). Applicable to encoders.
+
+``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE (boolean)``
+    Macroblock level rate control enable. Applicable to the MPEG4 and
+    H264 encoders.
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_QPEL (boolean)``
+    Quarter pixel motion estimation for MPEG4. Applicable to the MPEG4
+    encoder.
+
+``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP (integer)``
+    Quantization parameter for an I frame for H263. Valid range: from 1
+    to 31.
+
+``V4L2_CID_MPEG_VIDEO_H263_MIN_QP (integer)``
+    Minimum quantization parameter for H263. Valid range: from 1 to 31.
+
+``V4L2_CID_MPEG_VIDEO_H263_MAX_QP (integer)``
+    Maximum quantization parameter for H263. Valid range: from 1 to 31.
+
+``V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP (integer)``
+    Quantization parameter for an P frame for H263. Valid range: from 1
+    to 31.
+
+``V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP (integer)``
+    Quantization parameter for an B frame for H263. Valid range: from 1
+    to 31.
+
+``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP (integer)``
+    Quantization parameter for an I frame for H264. Valid range: from 0
+    to 51.
+
+``V4L2_CID_MPEG_VIDEO_H264_MIN_QP (integer)``
+    Minimum quantization parameter for H264. Valid range: from 0 to 51.
+
+``V4L2_CID_MPEG_VIDEO_H264_MAX_QP (integer)``
+    Maximum quantization parameter for H264. Valid range: from 0 to 51.
+
+``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP (integer)``
+    Quantization parameter for an P frame for H264. Valid range: from 0
+    to 51.
+
+``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP (integer)``
+    Quantization parameter for an B frame for H264. Valid range: from 0
+    to 51.
+
+``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP (integer)``
+    Minimum quantization parameter for the H264 I frame to limit I frame
+    quality to a range. Valid range: from 0 to 51. If
+    V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
+    should be chosen to meet both requirements.
+
+``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP (integer)``
+    Maximum quantization parameter for the H264 I frame to limit I frame
+    quality to a range. Valid range: from 0 to 51. If
+    V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
+    should be chosen to meet both requirements.
+
+``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP (integer)``
+    Minimum quantization parameter for the H264 P frame to limit P frame
+    quality to a range. Valid range: from 0 to 51. If
+    V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
+    should be chosen to meet both requirements.
+
+``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP (integer)``
+    Maximum quantization parameter for the H264 P frame to limit P frame
+    quality to a range. Valid range: from 0 to 51. If
+    V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
+    should be chosen to meet both requirements.
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (integer)``
+    Quantization parameter for an I frame for MPEG4. Valid range: from 1
+    to 31.
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP (integer)``
+    Minimum quantization parameter for MPEG4. Valid range: from 1 to 31.
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP (integer)``
+    Maximum quantization parameter for MPEG4. Valid range: from 1 to 31.
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP (integer)``
+    Quantization parameter for an P frame for MPEG4. Valid range: from 1
+    to 31.
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP (integer)``
+    Quantization parameter for an B frame for MPEG4. Valid range: from 1
+    to 31.
+
+.. _v4l2-mpeg-video-vbv-size:
+
+``V4L2_CID_MPEG_VIDEO_VBV_SIZE (integer)``
+    The Video Buffer Verifier size in kilobytes, it is used as a
+    limitation of frame skip. The VBV is defined in the standard as a
+    mean to verify that the produced stream will be successfully
+    decoded. The standard describes it as "Part of a hypothetical
+    decoder that is conceptually connected to the output of the encoder.
+    Its purpose is to provide a constraint on the variability of the
+    data rate that an encoder or editing process may produce.".
+    Applicable to the MPEG1, MPEG2, MPEG4 encoders.
+
+.. _v4l2-mpeg-video-vbv-delay:
+
+``V4L2_CID_MPEG_VIDEO_VBV_DELAY (integer)``
+    Sets the initial delay in milliseconds for VBV buffer control.
+
+.. _v4l2-mpeg-video-hor-search-range:
+
+``V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE (integer)``
+    Horizontal search range defines maximum horizontal search area in
+    pixels to search and match for the present Macroblock (MB) in the
+    reference picture. This V4L2 control macro is used to set horizontal
+    search range for motion estimation module in video encoder.
+
+.. _v4l2-mpeg-video-vert-search-range:
+
+``V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE (integer)``
+    Vertical search range defines maximum vertical search area in pixels
+    to search and match for the present Macroblock (MB) in the reference
+    picture. This V4L2 control macro is used to set vertical search
+    range for motion estimation module in video encoder.
+
+.. _v4l2-mpeg-video-force-key-frame:
+
+``V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME (button)``
+    Force a key frame for the next queued buffer. Applicable to
+    encoders. This is a general, codec-agnostic keyframe control.
+
+.. _v4l2-mpeg-video-h264-cpb-size:
+
+``V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE (integer)``
+    The Coded Picture Buffer size in kilobytes, it is used as a
+    limitation of frame skip. The CPB is defined in the H264 standard as
+    a mean to verify that the produced stream will be successfully
+    decoded. Applicable to the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_I_PERIOD (integer)``
+    Period between I-frames in the open GOP for H264. In case of an open
+    GOP this is the period between two I-frames. The period between IDR
+    (Instantaneous Decoding Refresh) frames is taken from the GOP_SIZE
+    control. An IDR frame, which stands for Instantaneous Decoding
+    Refresh is an I-frame after which no prior frames are referenced.
+    This means that a stream can be restarted from an IDR frame without
+    the need to store or decode any previous frames. Applicable to the
+    H264 encoder.
+
+.. _v4l2-mpeg-video-header-mode:
+
+``V4L2_CID_MPEG_VIDEO_HEADER_MODE``
+    (enum)
+
+enum v4l2_mpeg_video_header_mode -
+    Determines whether the header is returned as the first buffer or is
+    it returned together with the first frame. Applicable to encoders.
+    Possible values are:
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{10.3cm}|p{7.2cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE``
+      - The stream header is returned separately in the first buffer.
+    * - ``V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME``
+      - The stream header is returned together with the first encoded
+	frame.
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER (boolean)``
+    Repeat the video sequence headers. Repeating these headers makes
+    random access to the video stream easier. Applicable to the MPEG1, 2
+    and 4 encoder.
+
+``V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER (boolean)``
+    Enabled the deblocking post processing filter for MPEG4 decoder.
+    Applicable to the MPEG4 decoder.
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_RES (integer)``
+    vop_time_increment_resolution value for MPEG4. Applicable to the
+    MPEG4 encoder.
+
+``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_INC (integer)``
+    vop_time_increment value for MPEG4. Applicable to the MPEG4
+    encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING (boolean)``
+    Enable generation of frame packing supplemental enhancement
+    information in the encoded bitstream. The frame packing SEI message
+    contains the arrangement of L and R planes for 3D viewing.
+    Applicable to the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0 (boolean)``
+    Sets current frame as frame0 in frame packing SEI. Applicable to the
+    H264 encoder.
+
+.. _v4l2-mpeg-video-h264-sei-fp-arrangement-type:
+
+``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE``
+    (enum)
+
+enum v4l2_mpeg_video_h264_sei_fp_arrangement_type -
+    Frame packing arrangement type for H264 SEI. Applicable to the H264
+    encoder. Possible values are:
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{12cm}|p{5.5cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_CHEKERBOARD``
+      - Pixels are alternatively from L and R.
+    * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_COLUMN``
+      - L and R are interlaced by column.
+    * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_ROW``
+      - L and R are interlaced by row.
+    * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_SIDE_BY_SIDE``
+      - L is on the left, R on the right.
+    * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM``
+      - L is on top, R on bottom.
+    * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TEMPORAL``
+      - One view per frame.
+
+.. raw:: latex
+
+    \normalsize
+
+
+
+``V4L2_CID_MPEG_VIDEO_H264_FMO (boolean)``
+    Enables flexible macroblock ordering in the encoded bitstream. It is
+    a technique used for restructuring the ordering of macroblocks in
+    pictures. Applicable to the H264 encoder.
+
+.. _v4l2-mpeg-video-h264-fmo-map-type:
+
+``V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE``
+   (enum)
+
+enum v4l2_mpeg_video_h264_fmo_map_type -
+    When using FMO, the map type divides the image in different scan
+    patterns of macroblocks. Applicable to the H264 encoder. Possible
+    values are:
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{12.5cm}|p{5.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_INTERLEAVED_SLICES``
+      - Slices are interleaved one after other with macroblocks in run
+	length order.
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_SCATTERED_SLICES``
+      - Scatters the macroblocks based on a mathematical function known to
+	both encoder and decoder.
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_FOREGROUND_WITH_LEFT_OVER``
+      - Macroblocks arranged in rectangular areas or regions of interest.
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_BOX_OUT``
+      - Slice groups grow in a cyclic way from centre to outwards.
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_RASTER_SCAN``
+      - Slice groups grow in raster scan pattern from left to right.
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_WIPE_SCAN``
+      - Slice groups grow in wipe scan pattern from top to bottom.
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_EXPLICIT``
+      - User defined map type.
+
+.. raw:: latex
+
+    \normalsize
+
+
+
+``V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP (integer)``
+    Number of slice groups in FMO. Applicable to the H264 encoder.
+
+.. _v4l2-mpeg-video-h264-fmo-change-direction:
+
+``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION``
+    (enum)
+
+enum v4l2_mpeg_video_h264_fmo_change_dir -
+    Specifies a direction of the slice group change for raster and wipe
+    maps. Applicable to the H264 encoder. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_RIGHT``
+      - Raster scan or wipe right.
+    * - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_LEFT``
+      - Reverse raster scan or wipe left.
+
+
+
+``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE (integer)``
+    Specifies the size of the first slice group for raster and wipe map.
+    Applicable to the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH (integer)``
+    Specifies the number of consecutive macroblocks for the interleaved
+    map. Applicable to the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_ASO (boolean)``
+    Enables arbitrary slice ordering in encoded bitstream. Applicable to
+    the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER (integer)``
+    Specifies the slice order in ASO. Applicable to the H264 encoder.
+    The supplied 32-bit integer is interpreted as follows (bit 0 = least
+    significant bit):
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Bit 0:15
+      - Slice ID
+    * - Bit 16:32
+      - Slice position or order
+
+
+
+``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING (boolean)``
+    Enables H264 hierarchical coding. Applicable to the H264 encoder.
+
+.. _v4l2-mpeg-video-h264-hierarchical-coding-type:
+
+``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE``
+    (enum)
+
+enum v4l2_mpeg_video_h264_hierarchical_coding_type -
+    Specifies the hierarchical coding type. Applicable to the H264
+    encoder. Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B``
+      - Hierarchical B coding.
+    * - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P``
+      - Hierarchical P coding.
+
+
+
+``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER (integer)``
+    Specifies the number of hierarchical coding layers. Applicable to
+    the H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP (integer)``
+    Specifies a user defined QP for each layer. Applicable to the H264
+    encoder. The supplied 32-bit integer is interpreted as follows (bit
+    0 = least significant bit):
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Bit 0:15
+      - QP value
+    * - Bit 16:32
+      - Layer number
+
+
+.. _v4l2-mpeg-h264:
+
+``V4L2_CID_MPEG_VIDEO_H264_SPS (struct)``
+    Specifies the sequence parameter set (as extracted from the
+    bitstream) for the associated H264 slice data. This includes the
+    necessary parameters for configuring a stateless hardware decoding
+    pipeline for H264. The bitstream parameters are defined according
+    to :ref:`h264`, section 7.4.2.1.1 "Sequence Parameter Set Data
+    Semantics". For further documentation, refer to the above
+    specification, unless there is an explicit comment stating
+    otherwise.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_h264_sps
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_h264_sps
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``profile_idc``
+      -
+    * - __u8
+      - ``constraint_set_flags``
+      - See :ref:`Sequence Parameter Set Constraints Set Flags <h264_sps_constraints_set_flags>`
+    * - __u8
+      - ``level_idc``
+      -
+    * - __u8
+      - ``seq_parameter_set_id``
+      -
+    * - __u8
+      - ``chroma_format_idc``
+      -
+    * - __u8
+      - ``bit_depth_luma_minus8``
+      -
+    * - __u8
+      - ``bit_depth_chroma_minus8``
+      -
+    * - __u8
+      - ``log2_max_frame_num_minus4``
+      -
+    * - __u8
+      - ``pic_order_cnt_type``
+      -
+    * - __u8
+      - ``log2_max_pic_order_cnt_lsb_minus4``
+      -
+    * - __u8
+      - ``max_num_ref_frames``
+      -
+    * - __u8
+      - ``num_ref_frames_in_pic_order_cnt_cycle``
+      -
+    * - __s32
+      - ``offset_for_ref_frame[255]``
+      -
+    * - __s32
+      - ``offset_for_non_ref_pic``
+      -
+    * - __s32
+      - ``offset_for_top_to_bottom_field``
+      -
+    * - __u16
+      - ``pic_width_in_mbs_minus1``
+      -
+    * - __u16
+      - ``pic_height_in_map_units_minus1``
+      -
+    * - __u32
+      - ``flags``
+      - See :ref:`Sequence Parameter Set Flags <h264_sps_flags>`
+
+.. _h264_sps_constraints_set_flags:
+
+``Sequence Parameter Set Constraints Set Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_H264_SPS_CONSTRAINT_SET0_FLAG``
+      - 0x00000001
+      -
+    * - ``V4L2_H264_SPS_CONSTRAINT_SET1_FLAG``
+      - 0x00000002
+      -
+    * - ``V4L2_H264_SPS_CONSTRAINT_SET2_FLAG``
+      - 0x00000004
+      -
+    * - ``V4L2_H264_SPS_CONSTRAINT_SET3_FLAG``
+      - 0x00000008
+      -
+    * - ``V4L2_H264_SPS_CONSTRAINT_SET4_FLAG``
+      - 0x00000010
+      -
+    * - ``V4L2_H264_SPS_CONSTRAINT_SET5_FLAG``
+      - 0x00000020
+      -
+
+.. _h264_sps_flags:
+
+``Sequence Parameter Set Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE``
+      - 0x00000001
+      -
+    * - ``V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS``
+      - 0x00000002
+      -
+    * - ``V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO``
+      - 0x00000004
+      -
+    * - ``V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED``
+      - 0x00000008
+      -
+    * - ``V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY``
+      - 0x00000010
+      -
+    * - ``V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD``
+      - 0x00000020
+      -
+    * - ``V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE``
+      - 0x00000040
+      -
+
+``V4L2_CID_MPEG_VIDEO_H264_PPS (struct)``
+    Specifies the picture parameter set (as extracted from the
+    bitstream) for the associated H264 slice data. This includes the
+    necessary parameters for configuring a stateless hardware decoding
+    pipeline for H264.  The bitstream parameters are defined according
+    to :ref:`h264`, section 7.4.2.2 "Picture Parameter Set RBSP
+    Semantics". For further documentation, refer to the above
+    specification, unless there is an explicit comment stating
+    otherwise.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_h264_pps
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_h264_pps
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``pic_parameter_set_id``
+      -
+    * - __u8
+      - ``seq_parameter_set_id``
+      -
+    * - __u8
+      - ``num_slice_groups_minus1``
+      -
+    * - __u8
+      - ``num_ref_idx_l0_default_active_minus1``
+      -
+    * - __u8
+      - ``num_ref_idx_l1_default_active_minus1``
+      -
+    * - __u8
+      - ``weighted_bipred_idc``
+      -
+    * - __s8
+      - ``pic_init_qp_minus26``
+      -
+    * - __s8
+      - ``pic_init_qs_minus26``
+      -
+    * - __s8
+      - ``chroma_qp_index_offset``
+      -
+    * - __s8
+      - ``second_chroma_qp_index_offset``
+      -
+    * - __u16
+      - ``flags``
+      - See :ref:`Picture Parameter Set Flags <h264_pps_flags>`
+
+.. _h264_pps_flags:
+
+``Picture Parameter Set Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE``
+      - 0x00000001
+      -
+    * - ``V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT``
+      - 0x00000002
+      -
+    * - ``V4L2_H264_PPS_FLAG_WEIGHTED_PRED``
+      - 0x00000004
+      -
+    * - ``V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT``
+      - 0x00000008
+      -
+    * - ``V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED``
+      - 0x00000010
+      -
+    * - ``V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT``
+      - 0x00000020
+      -
+    * - ``V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE``
+      - 0x00000040
+      -
+    * - ``V4L2_H264_PPS_FLAG_SCALING_MATRIX_PRESENT``
+      - 0x00000080
+      - Indicates that ``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX``
+        must be used for this picture.
+
+``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX (struct)``
+    Specifies the scaling matrix (as extracted from the bitstream) for
+    the associated H264 slice data. The bitstream parameters are
+    defined according to :ref:`h264`, section 7.4.2.1.1.1 "Scaling
+    List Semantics". For further documentation, refer to the above
+    specification, unless there is an explicit comment stating
+    otherwise.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_h264_scaling_matrix
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_h264_scaling_matrix
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``scaling_list_4x4[6][16]``
+      - Scaling matrix after applying the inverse scanning process.
+        Expected list order is Intra Y, Intra Cb, Intra Cr, Inter Y,
+        Inter Cb, Inter Cr. The values on each scaling list are
+        expected in raster scan order.
+    * - __u8
+      - ``scaling_list_8x8[6][64]``
+      - Scaling matrix after applying the inverse scanning process.
+        Expected list order is Intra Y, Inter Y, Intra Cb, Inter Cb,
+        Intra Cr, Inter Cr. The values on each scaling list are
+        expected in raster scan order.
+
+``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS (struct)``
+    Specifies the slice parameters (as extracted from the bitstream)
+    for the associated H264 slice data. This includes the necessary
+    parameters for configuring a stateless hardware decoding pipeline
+    for H264.  The bitstream parameters are defined according to
+    :ref:`h264`, section 7.4.3 "Slice Header Semantics". For further
+    documentation, refer to the above specification, unless there is
+    an explicit comment stating otherwise.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API
+       and it is expected to change.
+
+.. c:type:: v4l2_ctrl_h264_slice_params
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_h264_slice_params
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``header_bit_size``
+      - Offset in bits to slice_data() from the beginning of this slice.
+    * - __u32
+      - ``first_mb_in_slice``
+      -
+    * - __u8
+      - ``slice_type``
+      -
+    * - __u8
+      - ``colour_plane_id``
+      -
+    * - __u8
+      - ``redundant_pic_cnt``
+      -
+    * - __u8
+      - ``cabac_init_idc``
+      -
+    * - __s8
+      - ``slice_qp_delta``
+      -
+    * - __s8
+      - ``slice_qs_delta``
+      -
+    * - __u8
+      - ``disable_deblocking_filter_idc``
+      -
+    * - __s8
+      - ``slice_alpha_c0_offset_div2``
+      -
+    * - __s8
+      - ``slice_beta_offset_div2``
+      -
+    * - __u8
+      - ``num_ref_idx_l0_active_minus1``
+      - If num_ref_idx_active_override_flag is not set, this field must be
+        set to the value of num_ref_idx_l0_default_active_minus1.
+    * - __u8
+      - ``num_ref_idx_l1_active_minus1``
+      - If num_ref_idx_active_override_flag is not set, this field must be
+        set to the value of num_ref_idx_l1_default_active_minus1.
+    * - __u8
+      - ``reserved``
+      - Applications and drivers must set this to zero.
+    * - struct :c:type:`v4l2_h264_reference`
+      - ``ref_pic_list0[32]``
+      - Reference picture list after applying the per-slice modifications
+    * - struct :c:type:`v4l2_h264_reference`
+      - ``ref_pic_list1[32]``
+      - Reference picture list after applying the per-slice modifications
+    * - __u32
+      - ``flags``
+      - See :ref:`Slice Parameter Flags <h264_slice_flags>`
+
+.. _h264_slice_flags:
+
+``Slice Parameter Set Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED``
+      - 0x00000001
+      -
+    * - ``V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH``
+      - 0x00000002
+      -
+
+``V4L2_CID_MPEG_VIDEO_H264_PRED_WEIGHTS (struct)``
+    Prediction weight table defined according to :ref:`h264`,
+    section 7.4.3.2 "Prediction Weight Table Semantics".
+    The prediction weight table must be passed by applications
+    under the conditions explained in section 7.3.3 "Slice header
+    syntax".
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_h264_pred_weights
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_h264_pred_weights
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u16
+      - ``luma_log2_weight_denom``
+      -
+    * - __u16
+      - ``chroma_log2_weight_denom``
+      -
+    * - struct :c:type:`v4l2_h264_weight_factors`
+      - ``weight_factors[2]``
+      - The weight factors at index 0 are the weight factors for the reference
+        list 0, the one at index 1 for the reference list 1.
+
+.. c:type:: v4l2_h264_weight_factors
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_h264_weight_factors
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __s16
+      - ``luma_weight[32]``
+      -
+    * - __s16
+      - ``luma_offset[32]``
+      -
+    * - __s16
+      - ``chroma_weight[32][2]``
+      -
+    * - __s16
+      - ``chroma_offset[32][2]``
+      -
+
+``Picture Reference``
+
+.. c:type:: v4l2_h264_reference
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_h264_reference
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``fields``
+      - Specifies how the picture is referenced. See :ref:`Reference Fields <h264_ref_fields>`
+    * - __u8
+      - ``index``
+      - Index into the :c:type:`v4l2_ctrl_h264_decode_params`.dpb array.
+
+.. _h264_ref_fields:
+
+``Reference Fields``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_H264_TOP_FIELD_REF``
+      - 0x1
+      - The top field in field pair is used for short-term reference.
+    * - ``V4L2_H264_BOTTOM_FIELD_REF``
+      - 0x2
+      - The bottom field in field pair is used for short-term reference.
+    * - ``V4L2_H264_FRAME_REF``
+      - 0x3
+      - The frame (or the top/bottom fields, if it's a field pair)
+        is used for short-term reference.
+
+``V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS (struct)``
+    Specifies the decode parameters (as extracted from the bitstream)
+    for the associated H264 slice data. This includes the necessary
+    parameters for configuring a stateless hardware decoding pipeline
+    for H264. The bitstream parameters are defined according to
+    :ref:`h264`. For further documentation, refer to the above
+    specification, unless there is an explicit comment stating
+    otherwise.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_h264_decode_params
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_h264_decode_params
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - struct :c:type:`v4l2_h264_dpb_entry`
+      - ``dpb[16]``
+      -
+    * - __u16
+      - ``nal_ref_idc``
+      - NAL reference ID value coming from the NAL Unit header
+    * - __u16
+      - ``frame_num``
+      -
+    * - __s32
+      - ``top_field_order_cnt``
+      - Picture Order Count for the coded top field
+    * - __s32
+      - ``bottom_field_order_cnt``
+      - Picture Order Count for the coded bottom field
+    * - __u16
+      - ``idr_pic_id``
+      -
+    * - __u16
+      - ``pic_order_cnt_lsb``
+      -
+    * - __s32
+      - ``delta_pic_order_cnt_bottom``
+      -
+    * - __s32
+      - ``delta_pic_order_cnt0``
+      -
+    * - __s32
+      - ``delta_pic_order_cnt1``
+      -
+    * - __u32
+      - ``dec_ref_pic_marking_bit_size``
+      - Size in bits of the dec_ref_pic_marking() syntax element.
+    * - __u32
+      - ``pic_order_cnt_bit_size``
+      - Combined size in bits of the picture order count related syntax
+        elements: pic_order_cnt_lsb, delta_pic_order_cnt_bottom,
+        delta_pic_order_cnt0, and delta_pic_order_cnt1.
+    * - __u32
+      - ``slice_group_change_cycle``
+      -
+    * - __u32
+      - ``reserved``
+      - Applications and drivers must set this to zero.
+    * - __u32
+      - ``flags``
+      - See :ref:`Decode Parameters Flags <h264_decode_params_flags>`
+
+.. _h264_decode_params_flags:
+
+``Decode Parameters Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC``
+      - 0x00000001
+      - That picture is an IDR picture
+    * - ``V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC``
+      - 0x00000002
+      -
+    * - ``V4L2_H264_DECODE_PARAM_FLAG_BOTTOM_FIELD``
+      - 0x00000004
+      -
+
+.. c:type:: v4l2_h264_dpb_entry
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_h264_dpb_entry
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u64
+      - ``reference_ts``
+      - Timestamp of the V4L2 capture buffer to use as reference, used
+        with B-coded and P-coded frames. The timestamp refers to the
+        ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
+        :c:func:`v4l2_timeval_to_ns()` function to convert the struct
+        :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
+    * - __u32
+      - ``pic_num``
+      -
+    * - __u16
+      - ``frame_num``
+      -
+    * - __u8
+      - ``fields``
+      - Specifies how the DPB entry is referenced. See :ref:`Reference Fields <h264_ref_fields>`
+    * - __u8
+      - ``reserved[5]``
+      - Applications and drivers must set this to zero.
+    * - __s32
+      - ``top_field_order_cnt``
+      -
+    * - __s32
+      - ``bottom_field_order_cnt``
+      -
+    * - __u32
+      - ``flags``
+      - See :ref:`DPB Entry Flags <h264_dpb_flags>`
+
+.. _h264_dpb_flags:
+
+``DPB Entries Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_H264_DPB_ENTRY_FLAG_VALID``
+      - 0x00000001
+      - The DPB entry is valid (non-empty) and should be considered.
+    * - ``V4L2_H264_DPB_ENTRY_FLAG_ACTIVE``
+      - 0x00000002
+      - The DPB entry is used for reference.
+    * - ``V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM``
+      - 0x00000004
+      - The DPB entry is used for long-term reference.
+    * - ``V4L2_H264_DPB_ENTRY_FLAG_FIELD``
+      - 0x00000008
+      - The DPB entry is a single field or a complementary field pair.
+
+``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE (enum)``
+    Specifies the decoding mode to use. Currently exposes slice-based and
+    frame-based decoding but new modes might be added later on.
+    This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
+    pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
+    are required to set this control in order to specify the decoding mode
+    that is expected for the buffer.
+    Drivers may expose a single or multiple decoding modes, depending
+    on what they can support.
+
+    .. note::
+
+       This menu control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_mpeg_video_h264_decode_mode
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED``
+      - 0
+      - Decoding is done at the slice granularity.
+        The OUTPUT buffer must contain a single slice.
+        When this mode is selected, the ``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS``
+        control shall be set. When multiple slices compose a frame,
+        use of ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` flag
+        is required.
+    * - ``V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED``
+      - 1
+      - Decoding is done at the frame granularity,
+        The OUTPUT buffer must contain all slices needed to decode the
+        frame. The OUTPUT buffer must also contain both fields.
+        This mode will be supported by devices that
+        parse the slice(s) header(s) in hardware. When this mode is
+        selected, the ``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS``
+        control shall not be set.
+
+``V4L2_CID_MPEG_VIDEO_H264_START_CODE (enum)``
+    Specifies the H264 slice start code expected for each slice.
+    This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
+    pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
+    are required to set this control in order to specify the start code
+    that is expected for the buffer.
+    Drivers may expose a single or multiple start codes, depending
+    on what they can support.
+
+    .. note::
+
+       This menu control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_mpeg_video_h264_start_code
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_MPEG_VIDEO_H264_START_CODE_NONE``
+      - 0
+      - Selecting this value specifies that H264 slices are passed
+        to the driver without any start code.
+    * - ``V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B``
+      - 1
+      - Selecting this value specifies that H264 slices are expected
+        to be prefixed by Annex B start codes. According to :ref:`h264`
+        valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
+
+.. _v4l2-mpeg-mpeg2:
+
+``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)``
+    Specifies the slice parameters (as extracted from the bitstream) for the
+    associated MPEG-2 slice data. This includes the necessary parameters for
+    configuring a stateless hardware decoding pipeline for MPEG-2.
+    The bitstream parameters are defined according to :ref:`mpeg2part2`.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_mpeg2_slice_params
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
+
+.. flat-table:: struct v4l2_ctrl_mpeg2_slice_params
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``bit_size``
+      - Size (in bits) of the current slice data.
+    * - __u32
+      - ``data_bit_offset``
+      - Offset (in bits) to the video data in the current slice data.
+    * - struct :c:type:`v4l2_mpeg2_sequence`
+      - ``sequence``
+      - Structure with MPEG-2 sequence metadata, merging relevant fields from
+	the sequence header and sequence extension parts of the bitstream.
+    * - struct :c:type:`v4l2_mpeg2_picture`
+      - ``picture``
+      - Structure with MPEG-2 picture metadata, merging relevant fields from
+	the picture header and picture coding extension parts of the bitstream.
+    * - __u64
+      - ``backward_ref_ts``
+      - Timestamp of the V4L2 capture buffer to use as backward reference, used
+        with B-coded and P-coded frames. The timestamp refers to the
+	``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
+	:c:func:`v4l2_timeval_to_ns()` function to convert the struct
+	:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
+    * - __u64
+      - ``forward_ref_ts``
+      - Timestamp for the V4L2 capture buffer to use as forward reference, used
+        with B-coded frames. The timestamp refers to the ``timestamp`` field in
+	struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
+	function to convert the struct :c:type:`timeval` in struct
+	:c:type:`v4l2_buffer` to a __u64.
+    * - __u32
+      - ``quantiser_scale_code``
+      - Code used to determine the quantization scale to use for the IDCT.
+
+.. c:type:: v4l2_mpeg2_sequence
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
+
+.. flat-table:: struct v4l2_mpeg2_sequence
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u16
+      - ``horizontal_size``
+      - The width of the displayable part of the frame's luminance component.
+    * - __u16
+      - ``vertical_size``
+      - The height of the displayable part of the frame's luminance component.
+    * - __u32
+      - ``vbv_buffer_size``
+      - Used to calculate the required size of the video buffering verifier,
+	defined (in bits) as: 16 * 1024 * vbv_buffer_size.
+    * - __u16
+      - ``profile_and_level_indication``
+      - The current profile and level indication as extracted from the
+	bitstream.
+    * - __u8
+      - ``progressive_sequence``
+      - Indication that all the frames for the sequence are progressive instead
+	of interlaced.
+    * - __u8
+      - ``chroma_format``
+      - The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4).
+
+.. c:type:: v4l2_mpeg2_picture
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
+
+.. flat-table:: struct v4l2_mpeg2_picture
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``picture_coding_type``
+      - Picture coding type for the frame covered by the current slice
+	(V4L2_MPEG2_PICTURE_CODING_TYPE_I, V4L2_MPEG2_PICTURE_CODING_TYPE_P or
+	V4L2_MPEG2_PICTURE_CODING_TYPE_B).
+    * - __u8
+      - ``f_code[2][2]``
+      - Motion vector codes.
+    * - __u8
+      - ``intra_dc_precision``
+      - Precision of Discrete Cosine transform (0: 8 bits precision,
+	1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision).
+    * - __u8
+      - ``picture_structure``
+      - Picture structure (1: interlaced top field, 2: interlaced bottom field,
+	3: progressive frame).
+    * - __u8
+      - ``top_field_first``
+      - If set to 1 and interlaced stream, top field is output first.
+    * - __u8
+      - ``frame_pred_frame_dct``
+      - If set to 1, only frame-DCT and frame prediction are used.
+    * - __u8
+      - ``concealment_motion_vectors``
+      -  If set to 1, motion vectors are coded for intra macroblocks.
+    * - __u8
+      - ``q_scale_type``
+      - This flag affects the inverse quantization process.
+    * - __u8
+      - ``intra_vlc_format``
+      - This flag affects the decoding of transform coefficient data.
+    * - __u8
+      - ``alternate_scan``
+      - This flag affects the decoding of transform coefficient data.
+    * - __u8
+      - ``repeat_first_field``
+      - This flag affects the decoding process of progressive frames.
+    * - __u16
+      - ``progressive_frame``
+      - Indicates whether the current frame is progressive.
+
+``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION (struct)``
+    Specifies quantization matrices (as extracted from the bitstream) for the
+    associated MPEG-2 slice data.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_mpeg2_quantization
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.2cm}|p{8.0cm}|p{7.4cm}|
+
+.. raw:: latex
+
+    \small
+
+.. flat-table:: struct v4l2_ctrl_mpeg2_quantization
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``load_intra_quantiser_matrix``
+      - One bit to indicate whether to load the ``intra_quantiser_matrix`` data.
+    * - __u8
+      - ``load_non_intra_quantiser_matrix``
+      - One bit to indicate whether to load the ``non_intra_quantiser_matrix``
+	data.
+    * - __u8
+      - ``load_chroma_intra_quantiser_matrix``
+      - One bit to indicate whether to load the
+	``chroma_intra_quantiser_matrix`` data, only relevant for non-4:2:0 YUV
+	formats.
+    * - __u8
+      - ``load_chroma_non_intra_quantiser_matrix``
+      - One bit to indicate whether to load the
+	``chroma_non_intra_quantiser_matrix`` data, only relevant for non-4:2:0
+	YUV formats.
+    * - __u8
+      - ``intra_quantiser_matrix[64]``
+      - The quantization matrix coefficients for intra-coded frames, in zigzag
+	scanning order. It is relevant for both luma and chroma components,
+	although it can be superseded by the chroma-specific matrix for
+	non-4:2:0 YUV formats.
+    * - __u8
+      - ``non_intra_quantiser_matrix[64]``
+      - The quantization matrix coefficients for non-intra-coded frames, in
+	zigzag scanning order. It is relevant for both luma and chroma
+	components, although it can be superseded by the chroma-specific matrix
+	for non-4:2:0 YUV formats.
+    * - __u8
+      - ``chroma_intra_quantiser_matrix[64]``
+      - The quantization matrix coefficients for the chominance component of
+	intra-coded frames, in zigzag scanning order. Only relevant for
+	non-4:2:0 YUV formats.
+    * - __u8
+      - ``chroma_non_intra_quantiser_matrix[64]``
+      - The quantization matrix coefficients for the chrominance component of
+	non-intra-coded frames, in zigzag scanning order. Only relevant for
+	non-4:2:0 YUV formats.
+
+``V4L2_CID_FWHT_I_FRAME_QP (integer)``
+    Quantization parameter for an I frame for FWHT. Valid range: from 1
+    to 31.
+
+``V4L2_CID_FWHT_P_FRAME_QP (integer)``
+    Quantization parameter for a P frame for FWHT. Valid range: from 1
+    to 31.
+
+.. _v4l2-mpeg-vp8:
+
+``V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER (struct)``
+    Specifies the frame parameters for the associated VP8 parsed frame data.
+    This includes the necessary parameters for
+    configuring a stateless hardware decoding pipeline for VP8.
+    The bitstream parameters are defined according to :ref:`vp8`.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_vp8_frame_header
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
+
+.. flat-table:: struct v4l2_ctrl_vp8_frame_header
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - struct :c:type:`v4l2_vp8_segment_header`
+      - ``segment_header``
+      - Structure with segment-based adjustments metadata.
+    * - struct :c:type:`v4l2_vp8_loopfilter_header`
+      - ``loopfilter_header``
+      - Structure with loop filter level adjustments metadata.
+    * - struct :c:type:`v4l2_vp8_quantization_header`
+      - ``quant_header``
+      - Structure with VP8 dequantization indices metadata.
+    * - struct :c:type:`v4l2_vp8_entropy_header`
+      - ``entropy_header``
+      - Structure with VP8 entropy coder probabilities metadata.
+    * - struct :c:type:`v4l2_vp8_entropy_coder_state`
+      - ``coder_state``
+      - Structure with VP8 entropy coder state.
+    * - __u16
+      - ``width``
+      - The width of the frame. Must be set for all frames.
+    * - __u16
+      - ``height``
+      - The height of the frame. Must be set for all frames.
+    * - __u8
+      - ``horizontal_scale``
+      - Horizontal scaling factor.
+    * - __u8
+      - ``vertical_scaling factor``
+      - Vertical scale.
+    * - __u8
+      - ``version``
+      - Bitstream version.
+    * - __u8
+      - ``prob_skip_false``
+      - Indicates the probability that the macroblock is not skipped.
+    * - __u8
+      - ``prob_intra``
+      - Indicates the probability that a macroblock is intra-predicted.
+    * - __u8
+      - ``prob_last``
+      - Indicates the probability that the last reference frame is used
+        for inter-prediction
+    * - __u8
+      - ``prob_gf``
+      - Indicates the probability that the golden reference frame is used
+        for inter-prediction
+    * - __u8
+      - ``num_dct_parts``
+      - Number of DCT coefficients partitions. Must be one of: 1, 2, 4, or 8.
+    * - __u32
+      - ``first_part_size``
+      - Size of the first partition, i.e. the control partition.
+    * - __u32
+      - ``first_part_header_bits``
+      - Size in bits of the first partition header portion.
+    * - __u32
+      - ``dct_part_sizes[8]``
+      - DCT coefficients sizes.
+    * - __u64
+      - ``last_frame_ts``
+      - Timestamp for the V4L2 capture buffer to use as last reference frame, used
+        with inter-coded frames. The timestamp refers to the ``timestamp`` field in
+	struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
+	function to convert the struct :c:type:`timeval` in struct
+	:c:type:`v4l2_buffer` to a __u64.
+    * - __u64
+      - ``golden_frame_ts``
+      - Timestamp for the V4L2 capture buffer to use as last reference frame, used
+        with inter-coded frames. The timestamp refers to the ``timestamp`` field in
+	struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
+	function to convert the struct :c:type:`timeval` in struct
+	:c:type:`v4l2_buffer` to a __u64.
+    * - __u64
+      - ``alt_frame_ts``
+      - Timestamp for the V4L2 capture buffer to use as alternate reference frame, used
+        with inter-coded frames. The timestamp refers to the ``timestamp`` field in
+	struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
+	function to convert the struct :c:type:`timeval` in struct
+	:c:type:`v4l2_buffer` to a __u64.
+    * - __u64
+      - ``flags``
+      - See :ref:`Frame Header Flags <vp8_frame_header_flags>`
+
+.. _vp8_frame_header_flags:
+
+``Frame Header Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_VP8_FRAME_HEADER_FLAG_KEY_FRAME``
+      - 0x01
+      - Indicates if the frame is a key frame.
+    * - ``V4L2_VP8_FRAME_HEADER_FLAG_EXPERIMENTAL``
+      - 0x02
+      - Experimental bitstream.
+    * - ``V4L2_VP8_FRAME_HEADER_FLAG_SHOW_FRAME``
+      - 0x04
+      - Show frame flag, indicates if the frame is for display.
+    * - ``V4L2_VP8_FRAME_HEADER_FLAG_MB_NO_SKIP_COEFF``
+      - 0x08
+      - Enable/disable skipping of macroblocks with no non-zero coefficients.
+    * - ``V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_GOLDEN``
+      - 0x10
+      - Sign of motion vectors when the golden frame is referenced.
+    * - ``V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_ALT``
+      - 0x20
+      - Sign of motion vectors when the alt frame is referenced.
+
+.. c:type:: v4l2_vp8_entropy_coder_state
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
+
+.. flat-table:: struct v4l2_vp8_entropy_coder_state
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``range``
+      -
+    * - __u8
+      - ``value``
+      -
+    * - __u8
+      - ``bit_count``
+      -
+    * - __u8
+      - ``padding``
+      - Applications and drivers must set this to zero.
+
+.. c:type:: v4l2_vp8_segment_header
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
+
+.. flat-table:: struct v4l2_vp8_segment_header
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __s8
+      - ``quant_update[4]``
+      - Signed quantizer value update.
+    * - __s8
+      - ``lf_update[4]``
+      - Signed loop filter level value update.
+    * - __u8
+      - ``segment_probs[3]``
+      - Segment probabilities.
+    * - __u8
+      - ``padding``
+      - Applications and drivers must set this to zero.
+    * - __u32
+      - ``flags``
+      - See :ref:`Segment Header Flags <vp8_segment_header_flags>`
+
+.. _vp8_segment_header_flags:
+
+``Segment Header Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_VP8_SEGMENT_HEADER_FLAG_ENABLED``
+      - 0x01
+      - Enable/disable segment-based adjustments.
+    * - ``V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_MAP``
+      - 0x02
+      - Indicates if the macroblock segmentation map is updated in this frame.
+    * - ``V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_FEATURE_DATA``
+      - 0x04
+      - Indicates if the segment feature data is updated in this frame.
+    * - ``V4L2_VP8_SEGMENT_HEADER_FLAG_DELTA_VALUE_MODE``
+      - 0x08
+      - If is set, the segment feature data mode is delta-value.
+        If cleared, it's absolute-value.
+
+.. c:type:: v4l2_vp8_loopfilter_header
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
+
+.. flat-table:: struct v4l2_vp8_loopfilter_header
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __s8
+      - ``ref_frm_delta[4]``
+      - Reference adjustment (signed) delta value.
+    * - __s8
+      - ``mb_mode_delta[4]``
+      - Macroblock prediction mode adjustment (signed) delta value.
+    * - __u8
+      - ``sharpness_level``
+      - Sharpness level
+    * - __u8
+      - ``level``
+      - Filter level
+    * - __u16
+      - ``padding``
+      - Applications and drivers must set this to zero.
+    * - __u32
+      - ``flags``
+      - See :ref:`Loopfilter Header Flags <vp8_loopfilter_header_flags>`
+
+.. _vp8_loopfilter_header_flags:
+
+``Loopfilter Header Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_VP8_LF_HEADER_ADJ_ENABLE``
+      - 0x01
+      - Enable/disable macroblock-level loop filter adjustment.
+    * - ``V4L2_VP8_LF_HEADER_DELTA_UPDATE``
+      - 0x02
+      - Indicates if the delta values used in an adjustment are updated.
+    * - ``V4L2_VP8_LF_FILTER_TYPE_SIMPLE``
+      - 0x04
+      - If set, indicates the filter type is simple.
+        If cleared, the filter type is normal.
+
+.. c:type:: v4l2_vp8_quantization_header
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
+
+.. flat-table:: struct v4l2_vp8_quantization_header
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``y_ac_qi``
+      - Luma AC coefficient table index.
+    * - __s8
+      - ``y_dc_delta``
+      - Luma DC delta vaue.
+    * - __s8
+      - ``y2_dc_delta``
+      - Y2 block DC delta value.
+    * - __s8
+      - ``y2_ac_delta``
+      - Y2 block AC delta value.
+    * - __s8
+      - ``uv_dc_delta``
+      - Chroma DC delta value.
+    * - __s8
+      - ``uv_ac_delta``
+      - Chroma AC delta value.
+    * - __u16
+      - ``padding``
+      - Applications and drivers must set this to zero.
+
+.. c:type:: v4l2_vp8_entropy_header
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
+
+.. flat-table:: struct v4l2_vp8_entropy_header
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``coeff_probs[4][8][3][11]``
+      - Coefficient update probabilities.
+    * - __u8
+      - ``y_mode_probs[4]``
+      - Luma mode update probabilities.
+    * - __u8
+      - ``uv_mode_probs[3]``
+      - Chroma mode update probabilities.
+    * - __u8
+      - ``mv_probs[2][19]``
+      - MV decoding update probabilities.
+    * - __u8
+      - ``padding[3]``
+      - Applications and drivers must set this to zero.
+
+.. raw:: latex
+
+    \normalsize
+
+
+MFC 5.1 MPEG Controls
+=====================
+
+The following MPEG class controls deal with MPEG decoding and encoding
+settings that are specific to the Multi Format Codec 5.1 device present
+in the S5P family of SoCs by Samsung.
+
+
+.. _mfc51-control-id:
+
+MFC 5.1 Control IDs
+-------------------
+
+``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE (boolean)``
+    If the display delay is enabled then the decoder is forced to return
+    a CAPTURE buffer (decoded frame) after processing a certain number
+    of OUTPUT buffers. The delay can be set through
+    ``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY``. This
+    feature can be used for example for generating thumbnails of videos.
+    Applicable to the H264 decoder.
+
+``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY (integer)``
+    Display delay value for H264 decoder. The decoder is forced to
+    return a decoded frame after the set 'display delay' number of
+    frames. If this number is low it may result in frames returned out
+    of display order, in addition the hardware may still be using the
+    returned buffer as a reference picture for subsequent frames.
+
+``V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P (integer)``
+    The number of reference pictures used for encoding a P picture.
+    Applicable to the H264 encoder.
+
+``V4L2_CID_MPEG_MFC51_VIDEO_PADDING (boolean)``
+    Padding enable in the encoder - use a color instead of repeating
+    border pixels. Applicable to encoders.
+
+``V4L2_CID_MPEG_MFC51_VIDEO_PADDING_YUV (integer)``
+    Padding color in the encoder. Applicable to encoders. The supplied
+    32-bit integer is interpreted as follows (bit 0 = least significant
+    bit):
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Bit 0:7
+      - V chrominance information
+    * - Bit 8:15
+      - U chrominance information
+    * - Bit 16:23
+      - Y luminance information
+    * - Bit 24:31
+      - Must be zero.
+
+
+
+``V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF (integer)``
+    Reaction coefficient for MFC rate control. Applicable to encoders.
+
+    .. note::
+
+       #. Valid only when the frame level RC is enabled.
+
+       #. For tight CBR, this field must be small (ex. 2 ~ 10). For
+	  VBR, this field must be large (ex. 100 ~ 1000).
+
+       #. It is not recommended to use the greater number than
+	  FRAME_RATE * (10^9 / BIT_RATE).
+
+``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_DARK (boolean)``
+    Adaptive rate control for dark region. Valid only when H.264 and
+    macroblock level RC is enabled
+    (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
+    encoder.
+
+``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_SMOOTH (boolean)``
+    Adaptive rate control for smooth region. Valid only when H.264 and
+    macroblock level RC is enabled
+    (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
+    encoder.
+
+``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_STATIC (boolean)``
+    Adaptive rate control for static region. Valid only when H.264 and
+    macroblock level RC is enabled
+    (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
+    encoder.
+
+``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_ACTIVITY (boolean)``
+    Adaptive rate control for activity region. Valid only when H.264 and
+    macroblock level RC is enabled
+    (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
+    encoder.
+
+.. _v4l2-mpeg-mfc51-video-frame-skip-mode:
+
+``V4L2_CID_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE``
+    (enum)
+
+    .. note::
+
+       This control is deprecated. Use the standard
+       ``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE`` control instead.
+
+enum v4l2_mpeg_mfc51_video_frame_skip_mode -
+    Indicates in what conditions the encoder should skip frames. If
+    encoding a frame would cause the encoded stream to be larger then a
+    chosen data limit then the frame will be skipped. Possible values
+    are:
+
+
+.. tabularcolumns:: |p{9.2cm}|p{8.3cm}|
+
+.. raw:: latex
+
+    \small
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_DISABLED``
+      - Frame skip mode is disabled.
+    * - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_LEVEL_LIMIT``
+      - Frame skip mode enabled and buffer limit is set by the chosen
+	level and is defined by the standard.
+    * - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_BUF_LIMIT``
+      - Frame skip mode enabled and buffer limit is set by the VBV
+	(MPEG1/2/4) or CPB (H264) buffer size control.
+
+.. raw:: latex
+
+    \normalsize
+
+``V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT (integer)``
+    Enable rate-control with fixed target bit. If this setting is
+    enabled, then the rate control logic of the encoder will calculate
+    the average bitrate for a GOP and keep it below or equal the set
+    bitrate target. Otherwise the rate control logic calculates the
+    overall average bitrate for the stream and keeps it below or equal
+    to the set bitrate. In the first case the average bitrate for the
+    whole stream will be smaller then the set bitrate. This is caused
+    because the average is calculated for smaller number of frames, on
+    the other hand enabling this setting will ensure that the stream
+    will meet tight bandwidth constraints. Applicable to encoders.
+
+.. _v4l2-mpeg-mfc51-video-force-frame-type:
+
+``V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE``
+    (enum)
+
+enum v4l2_mpeg_mfc51_video_force_frame_type -
+    Force a frame type for the next queued buffer. Applicable to
+    encoders. Possible values are:
+
+.. tabularcolumns:: |p{9.5cm}|p{8.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_DISABLED``
+      - Forcing a specific frame type disabled.
+    * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_I_FRAME``
+      - Force an I-frame.
+    * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_NOT_CODED``
+      - Force a non-coded frame.
+
+
+.. _v4l2-mpeg-fwht:
+
+``V4L2_CID_MPEG_VIDEO_FWHT_PARAMS (struct)``
+    Specifies the fwht parameters (as extracted from the bitstream) for the
+    associated FWHT data. This includes the necessary parameters for
+    configuring a stateless hardware decoding pipeline for FWHT.
+
+    .. note::
+
+       This compound control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_ctrl_fwht_params
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.4cm}|p{4.3cm}|p{11.8cm}|
+
+.. flat-table:: struct v4l2_ctrl_fwht_params
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u64
+      - ``backward_ref_ts``
+      - Timestamp of the V4L2 capture buffer to use as backward reference, used
+        with P-coded frames. The timestamp refers to the
+	``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
+	:c:func:`v4l2_timeval_to_ns()` function to convert the struct
+	:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
+    * - __u32
+      - ``version``
+      - The version of the codec
+    * - __u32
+      - ``width``
+      - The width of the frame
+    * - __u32
+      - ``height``
+      - The height of the frame
+    * - __u32
+      - ``flags``
+      - The flags of the frame, see :ref:`fwht-flags`.
+    * - __u32
+      - ``colorspace``
+      - The colorspace of the frame, from enum :c:type:`v4l2_colorspace`.
+    * - __u32
+      - ``xfer_func``
+      - The transfer function, from enum :c:type:`v4l2_xfer_func`.
+    * - __u32
+      - ``ycbcr_enc``
+      - The Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`.
+    * - __u32
+      - ``quantization``
+      - The quantization range, from enum :c:type:`v4l2_quantization`.
+
+
+
+.. _fwht-flags:
+
+FWHT Flags
+============
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{6.8cm}|p{2.4cm}|p{8.3cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``FWHT_FL_IS_INTERLACED``
+      - 0x00000001
+      - Set if this is an interlaced format
+    * - ``FWHT_FL_IS_BOTTOM_FIRST``
+      - 0x00000002
+      - Set if this is a bottom-first (NTSC) interlaced format
+    * - ``FWHT_FL_IS_ALTERNATE``
+      - 0x00000004
+      - Set if each 'frame' contains just one field
+    * - ``FWHT_FL_IS_BOTTOM_FIELD``
+      - 0x00000008
+      - If FWHT_FL_IS_ALTERNATE was set, then this is set if this 'frame' is the
+	bottom field, else it is the top field.
+    * - ``FWHT_FL_LUMA_IS_UNCOMPRESSED``
+      - 0x00000010
+      - Set if the luma plane is uncompressed
+    * - ``FWHT_FL_CB_IS_UNCOMPRESSED``
+      - 0x00000020
+      - Set if the cb plane is uncompressed
+    * - ``FWHT_FL_CR_IS_UNCOMPRESSED``
+      - 0x00000040
+      - Set if the cr plane is uncompressed
+    * - ``FWHT_FL_CHROMA_FULL_HEIGHT``
+      - 0x00000080
+      - Set if the chroma plane has the same height as the luma plane,
+	else the chroma plane is half the height of the luma plane
+    * - ``FWHT_FL_CHROMA_FULL_WIDTH``
+      - 0x00000100
+      - Set if the chroma plane has the same width as the luma plane,
+	else the chroma plane is half the width of the luma plane
+    * - ``FWHT_FL_ALPHA_IS_UNCOMPRESSED``
+      - 0x00000200
+      - Set if the alpha plane is uncompressed
+    * - ``FWHT_FL_I_FRAME``
+      - 0x00000400
+      - Set if this is an I-frame
+    * - ``FWHT_FL_COMPONENTS_NUM_MSK``
+      - 0x00070000
+      - A 4-values flag - the number of components - 1
+    * - ``FWHT_FL_PIXENC_YUV``
+      - 0x00080000
+      - Set if the pixel encoding is YUV
+    * - ``FWHT_FL_PIXENC_RGB``
+      - 0x00100000
+      - Set if the pixel encoding is RGB
+    * - ``FWHT_FL_PIXENC_HSV``
+      - 0x00180000
+      - Set if the pixel encoding is HSV
+
+
+CX2341x MPEG Controls
+=====================
+
+The following MPEG class controls deal with MPEG encoding settings that
+are specific to the Conexant CX23415 and CX23416 MPEG encoding chips.
+
+
+.. _cx2341x-control-id:
+
+CX2341x Control IDs
+-------------------
+
+.. _v4l2-mpeg-cx2341x-video-spatial-filter-mode:
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE``
+    (enum)
+
+enum v4l2_mpeg_cx2341x_video_spatial_filter_mode -
+    Sets the Spatial Filter mode (default ``MANUAL``). Possible values
+    are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_MANUAL``
+      - Choose the filter manually
+    * - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_AUTO``
+      - Choose the filter automatically
+
+
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER (integer (0-15))``
+    The setting for the Spatial Filter. 0 = off, 15 = maximum. (Default
+    is 0.)
+
+.. _luma-spatial-filter-type:
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE``
+    (enum)
+
+enum v4l2_mpeg_cx2341x_video_luma_spatial_filter_type -
+    Select the algorithm to use for the Luma Spatial Filter (default
+    ``1D_HOR``). Possible values:
+
+.. tabularcolumns:: |p{14.5cm}|p{3.0cm}|
+
+.. raw:: latex
+
+    \small
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_OFF``
+      - No filter
+    * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR``
+      - One-dimensional horizontal
+    * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_VERT``
+      - One-dimensional vertical
+    * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_HV_SEPARABLE``
+      - Two-dimensional separable
+    * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_SYM_NON_SEPARABLE``
+      - Two-dimensional symmetrical non-separable
+
+.. raw:: latex
+
+    \normalsize
+
+
+
+.. _chroma-spatial-filter-type:
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE``
+    (enum)
+
+enum v4l2_mpeg_cx2341x_video_chroma_spatial_filter_type -
+    Select the algorithm for the Chroma Spatial Filter (default
+    ``1D_HOR``). Possible values are:
+
+
+.. tabularcolumns:: |p{14.0cm}|p{3.5cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_OFF``
+      - No filter
+    * - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR``
+      - One-dimensional horizontal
+
+
+
+.. _v4l2-mpeg-cx2341x-video-temporal-filter-mode:
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE``
+    (enum)
+
+enum v4l2_mpeg_cx2341x_video_temporal_filter_mode -
+    Sets the Temporal Filter mode (default ``MANUAL``). Possible values
+    are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL``
+      - Choose the filter manually
+    * - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_AUTO``
+      - Choose the filter automatically
+
+
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER (integer (0-31))``
+    The setting for the Temporal Filter. 0 = off, 31 = maximum. (Default
+    is 8 for full-scale capturing and 0 for scaled capturing.)
+
+.. _v4l2-mpeg-cx2341x-video-median-filter-type:
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE``
+    (enum)
+
+enum v4l2_mpeg_cx2341x_video_median_filter_type -
+    Median Filter Type (default ``OFF``). Possible values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF``
+      - No filter
+    * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR``
+      - Horizontal filter
+    * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_VERT``
+      - Vertical filter
+    * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR_VERT``
+      - Horizontal and vertical filter
+    * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_DIAG``
+      - Diagonal filter
+
+
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_BOTTOM (integer (0-255))``
+    Threshold above which the luminance median filter is enabled
+    (default 0)
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_TOP (integer (0-255))``
+    Threshold below which the luminance median filter is enabled
+    (default 255)
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_BOTTOM (integer (0-255))``
+    Threshold above which the chroma median filter is enabled (default
+    0)
+
+``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_TOP (integer (0-255))``
+    Threshold below which the chroma median filter is enabled (default
+    255)
+
+``V4L2_CID_MPEG_CX2341X_STREAM_INSERT_NAV_PACKETS (boolean)``
+    The CX2341X MPEG encoder can insert one empty MPEG-2 PES packet into
+    the stream between every four video frames. The packet size is 2048
+    bytes, including the packet_start_code_prefix and stream_id
+    fields. The stream_id is 0xBF (private stream 2). The payload
+    consists of 0x00 bytes, to be filled in by the application. 0 = do
+    not insert, 1 = insert packets.
+
+
+VPX Control Reference
+=====================
+
+The VPX controls include controls for encoding parameters of VPx video
+codec.
+
+
+.. _vpx-control-id:
+
+VPX Control IDs
+---------------
+
+.. _v4l2-vpx-num-partitions:
+
+``V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS``
+    (enum)
+
+enum v4l2_vp8_num_partitions -
+    The number of token partitions to use in VP8 encoder. Possible
+    values are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_1_PARTITION``
+      - 1 coefficient partition
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_2_PARTITIONS``
+      - 2 coefficient partitions
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_4_PARTITIONS``
+      - 4 coefficient partitions
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_8_PARTITIONS``
+      - 8 coefficient partitions
+
+
+
+``V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4 (boolean)``
+    Setting this prevents intra 4x4 mode in the intra mode decision.
+
+.. _v4l2-vpx-num-ref-frames:
+
+``V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES``
+    (enum)
+
+enum v4l2_vp8_num_ref_frames -
+    The number of reference pictures for encoding P frames. Possible
+    values are:
+
+.. tabularcolumns:: |p{7.9cm}|p{9.6cm}|
+
+.. raw:: latex
+
+    \small
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_1_REF_FRAME``
+      - Last encoded frame will be searched
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_2_REF_FRAME``
+      - Two frames will be searched among the last encoded frame, the
+	golden frame and the alternate reference (altref) frame. The
+	encoder implementation will decide which two are chosen.
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_3_REF_FRAME``
+      - The last encoded frame, the golden frame and the altref frame will
+	be searched.
+
+.. raw:: latex
+
+    \normalsize
+
+
+
+``V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL (integer)``
+    Indicates the loop filter level. The adjustment of the loop filter
+    level is done via a delta value against a baseline loop filter
+    value.
+
+``V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS (integer)``
+    This parameter affects the loop filter. Anything above zero weakens
+    the deblocking effect on the loop filter.
+
+``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD (integer)``
+    Sets the refresh period for the golden frame. The period is defined
+    in number of frames. For a value of 'n', every nth frame starting
+    from the first key frame will be taken as a golden frame. For eg.
+    for encoding sequence of 0, 1, 2, 3, 4, 5, 6, 7 where the golden
+    frame refresh period is set as 4, the frames 0, 4, 8 etc will be
+    taken as the golden frames as frame 0 is always a key frame.
+
+.. _v4l2-vpx-golden-frame-sel:
+
+``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL``
+    (enum)
+
+enum v4l2_vp8_golden_frame_sel -
+    Selects the golden frame for encoding. Possible values are:
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_PREV``
+      - Use the (n-2)th frame as a golden frame, current frame index being
+	'n'.
+    * - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_REF_PERIOD``
+      - Use the previous specific frame indicated by
+	``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD`` as a
+	golden frame.
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_MPEG_VIDEO_VPX_MIN_QP (integer)``
+    Minimum quantization parameter for VP8.
+
+``V4L2_CID_MPEG_VIDEO_VPX_MAX_QP (integer)``
+    Maximum quantization parameter for VP8.
+
+``V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP (integer)``
+    Quantization parameter for an I frame for VP8.
+
+``V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP (integer)``
+    Quantization parameter for a P frame for VP8.
+
+.. _v4l2-mpeg-video-vp8-profile:
+
+``V4L2_CID_MPEG_VIDEO_VP8_PROFILE``
+    (enum)
+
+enum v4l2_mpeg_video_vp8_profile -
+    This control allows selecting the profile for VP8 encoder.
+    This is also used to enumerate supported profiles by VP8 encoder or decoder.
+    Possible values are:
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_0``
+      - Profile 0
+    * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_1``
+      - Profile 1
+    * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_2``
+      - Profile 2
+    * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_3``
+      - Profile 3
+
+.. _v4l2-mpeg-video-vp9-profile:
+
+``V4L2_CID_MPEG_VIDEO_VP9_PROFILE``
+    (enum)
+
+enum v4l2_mpeg_video_vp9_profile -
+    This control allows selecting the profile for VP9 encoder.
+    This is also used to enumerate supported profiles by VP9 encoder or decoder.
+    Possible values are:
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_0``
+      - Profile 0
+    * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_1``
+      - Profile 1
+    * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_2``
+      - Profile 2
+    * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_3``
+      - Profile 3
+
+.. _v4l2-mpeg-video-vp9-level:
+
+``V4L2_CID_MPEG_VIDEO_VP9_LEVEL (enum)``
+
+enum v4l2_mpeg_video_vp9_level -
+    This control allows selecting the level for VP9 encoder.
+    This is also used to enumerate supported levels by VP9 encoder or decoder.
+    More information can be found at
+    `webmproject <https://www.webmproject.org/vp9/levels/>`__. Possible values are:
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_0``
+      - Level 1
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_1_1``
+      - Level 1.1
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_0``
+      - Level 2
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_2_1``
+      - Level 2.1
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_0``
+      - Level 3
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_3_1``
+      - Level 3.1
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_0``
+      - Level 4
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_4_1``
+      - Level 4.1
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_0``
+      - Level 5
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_1``
+      - Level 5.1
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_5_2``
+      - Level 5.2
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_0``
+      - Level 6
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_1``
+      - Level 6.1
+    * - ``V4L2_MPEG_VIDEO_VP9_LEVEL_6_2``
+      - Level 6.2
+
+
+High Efficiency Video Coding (HEVC/H.265) Control Reference
+===========================================================
+
+The HEVC/H.265 controls include controls for encoding parameters of HEVC/H.265
+video codec.
+
+
+.. _hevc-control-id:
+
+HEVC/H.265 Control IDs
+----------------------
+
+``V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP (integer)``
+    Minimum quantization parameter for HEVC.
+    Valid range: from 0 to 51.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP (integer)``
+    Maximum quantization parameter for HEVC.
+    Valid range: from 0 to 51.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP (integer)``
+    Quantization parameter for an I frame for HEVC.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP (integer)``
+    Quantization parameter for a P frame for HEVC.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP (integer)``
+    Quantization parameter for a B frame for HEVC.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP (boolean)``
+    HIERARCHICAL_QP allows the host to specify the quantization parameter
+    values for each temporal layer through HIERARCHICAL_QP_LAYER. This is
+    valid only if HIERARCHICAL_CODING_LAYER is greater than 1. Setting the
+    control value to 1 enables setting of the QP values for the layers.
+
+.. _v4l2-hevc-hier-coding-type:
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE``
+    (enum)
+
+enum v4l2_mpeg_video_hevc_hier_coding_type -
+    Selects the hierarchical coding type for encoding. Possible values are:
+
+.. raw:: latex
+
+    \footnotesize
+
+.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B``
+      - Use the B frame for hierarchical coding.
+    * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P``
+      - Use the P frame for hierarchical coding.
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER (integer)``
+    Selects the hierarchical coding layer. In normal encoding
+    (non-hierarchial coding), it should be zero. Possible values are [0, 6].
+    0 indicates HIERARCHICAL CODING LAYER 0, 1 indicates HIERARCHICAL CODING
+    LAYER 1 and so on.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP (integer)``
+    Indicates quantization parameter for hierarchical coding layer 0.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP (integer)``
+    Indicates quantization parameter for hierarchical coding layer 1.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP (integer)``
+    Indicates quantization parameter for hierarchical coding layer 2.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP (integer)``
+    Indicates quantization parameter for hierarchical coding layer 3.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP (integer)``
+    Indicates quantization parameter for hierarchical coding layer 4.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP (integer)``
+    Indicates quantization parameter for hierarchical coding layer 5.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP (integer)``
+    Indicates quantization parameter for hierarchical coding layer 6.
+    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
+    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
+
+.. _v4l2-hevc-profile:
+
+``V4L2_CID_MPEG_VIDEO_HEVC_PROFILE``
+    (enum)
+
+enum v4l2_mpeg_video_hevc_profile -
+    Select the desired profile for HEVC encoder.
+
+.. raw:: latex
+
+    \footnotesize
+
+.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN``
+      - Main profile.
+    * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE``
+      - Main still picture profile.
+    * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10``
+      - Main 10 profile.
+
+.. raw:: latex
+
+    \normalsize
+
+
+.. _v4l2-hevc-level:
+
+``V4L2_CID_MPEG_VIDEO_HEVC_LEVEL``
+    (enum)
+
+enum v4l2_mpeg_video_hevc_level -
+    Selects the desired level for HEVC encoder.
+
+.. raw:: latex
+
+    \footnotesize
+
+.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_1``
+      - Level 1.0
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2``
+      - Level 2.0
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1``
+      - Level 2.1
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3``
+      - Level 3.0
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1``
+      - Level 3.1
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4``
+      - Level 4.0
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1``
+      - Level 4.1
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5``
+      - Level 5.0
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1``
+      - Level 5.1
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2``
+      - Level 5.2
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6``
+      - Level 6.0
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1``
+      - Level 6.1
+    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2``
+      - Level 6.2
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION (integer)``
+    Indicates the number of evenly spaced subintervals, called ticks, within
+    one second. This is a 16 bit unsigned integer and has a maximum value up to
+    0xffff and a minimum value of 1.
+
+.. _v4l2-hevc-tier:
+
+``V4L2_CID_MPEG_VIDEO_HEVC_TIER``
+    (enum)
+
+enum v4l2_mpeg_video_hevc_tier -
+    TIER_FLAG specifies tiers information of the HEVC encoded picture. Tier
+    were made to deal with applications that differ in terms of maximum bit
+    rate. Setting the flag to 0 selects HEVC tier as Main tier and setting
+    this flag to 1 indicates High tier. High tier is for applications requiring
+    high bit rates.
+
+.. raw:: latex
+
+    \footnotesize
+
+.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_TIER_MAIN``
+      - Main tier.
+    * - ``V4L2_MPEG_VIDEO_HEVC_TIER_HIGH``
+      - High tier.
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH (integer)``
+    Selects HEVC maximum coding unit depth.
+
+.. _v4l2-hevc-loop-filter-mode:
+
+``V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE``
+    (enum)
+
+enum v4l2_mpeg_video_hevc_loop_filter_mode -
+    Loop filter mode for HEVC encoder. Possible values are:
+
+.. raw:: latex
+
+    \footnotesize
+
+.. tabularcolumns:: |p{12.1cm}|p{5.4cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED``
+      - Loop filter is disabled.
+    * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_ENABLED``
+      - Loop filter is enabled.
+    * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY``
+      - Loop filter is disabled at the slice boundary.
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2 (integer)``
+    Selects HEVC loop filter beta offset. The valid range is [-6, +6].
+
+``V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2 (integer)``
+    Selects HEVC loop filter tc offset. The valid range is [-6, +6].
+
+.. _v4l2-hevc-refresh-type:
+
+``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE``
+    (enum)
+
+enum v4l2_mpeg_video_hevc_hier_refresh_type -
+    Selects refresh type for HEVC encoder.
+    Host has to specify the period into
+    V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD.
+
+.. raw:: latex
+
+    \footnotesize
+
+.. tabularcolumns:: |p{8.0cm}|p{9.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_NONE``
+      - Use the B frame for hierarchical coding.
+    * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_CRA``
+      - Use CRA (Clean Random Access Unit) picture encoding.
+    * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_IDR``
+      - Use IDR (Instantaneous Decoding Refresh) picture encoding.
+
+.. raw:: latex
+
+    \normalsize
+
+
+``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD (integer)``
+    Selects the refresh period for HEVC encoder.
+    This specifies the number of I pictures between two CRA/IDR pictures.
+    This is valid only if REFRESH_TYPE is not 0.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU (boolean)``
+    Indicates HEVC lossless encoding. Setting it to 0 disables lossless
+    encoding. Setting it to 1 enables lossless encoding.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED (boolean)``
+    Indicates constant intra prediction for HEVC encoder. Specifies the
+    constrained intra prediction in which intra largest coding unit (LCU)
+    prediction is performed by using residual data and decoded samples of
+    neighboring intra LCU only. Setting the value to 1 enables constant intra
+    prediction and setting the value to 0 disables constant intra prediction.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT (boolean)``
+    Indicates wavefront parallel processing for HEVC encoder. Setting it to 0
+    disables the feature and setting it to 1 enables the wavefront parallel
+    processing.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB (boolean)``
+    Setting the value to 1 enables combination of P and B frame for HEVC
+    encoder.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID (boolean)``
+    Indicates temporal identifier for HEVC encoder which is enabled by
+    setting the value to 1.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING (boolean)``
+    Indicates bi-linear interpolation is conditionally used in the intra
+    prediction filtering process in the CVS when set to 1. Indicates bi-linear
+    interpolation is not used in the CVS when set to 0.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1 (integer)``
+    Indicates maximum number of merge candidate motion vectors.
+    Values are from 0 to 4.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION (boolean)``
+    Indicates temporal motion vector prediction for HEVC encoder. Setting it to
+    1 enables the prediction. Setting it to 0 disables the prediction.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE (boolean)``
+    Specifies if HEVC generates a stream with a size of the length field
+    instead of start code pattern. The size of the length field is configurable
+    through the V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD control. Setting
+    the value to 0 disables encoding without startcode pattern. Setting the
+    value to 1 will enables encoding without startcode pattern.
+
+.. _v4l2-hevc-size-of-length-field:
+
+``V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD``
+(enum)
+
+enum v4l2_mpeg_video_hevc_size_of_length_field -
+    Indicates the size of length field.
+    This is valid when encoding WITHOUT_STARTCODE_ENABLE is enabled.
+
+.. raw:: latex
+
+    \footnotesize
+
+.. tabularcolumns:: |p{6.0cm}|p{11.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_0``
+      - Generate start code pattern (Normal).
+    * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_1``
+      - Generate size of length field instead of start code pattern and length is 1.
+    * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_2``
+      - Generate size of length field instead of start code pattern and length is 2.
+    * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_4``
+      - Generate size of length field instead of start code pattern and length is 4.
+
+.. raw:: latex
+
+    \normalsize
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 0 for HEVC encoder.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 1 for HEVC encoder.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 2 for HEVC encoder.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 3 for HEVC encoder.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 4 for HEVC encoder.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 5 for HEVC encoder.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 6 for HEVC encoder.
+
+``V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES (integer)``
+    Selects number of P reference pictures required for HEVC encoder.
+    P-Frame can use 1 or 2 frames for reference.
+
+``V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR (integer)``
+    Indicates whether to generate SPS and PPS at every IDR. Setting it to 0
+    disables generating SPS and PPS at every IDR. Setting it to one enables
+    generating SPS and PPS at every IDR.
+
+.. _v4l2-mpeg-hevc:
+
+``V4L2_CID_MPEG_VIDEO_HEVC_SPS (struct)``
+    Specifies the Sequence Parameter Set fields (as extracted from the
+    bitstream) for the associated HEVC slice data.
+    These bitstream parameters are defined according to :ref:`hevc`.
+    They are described in section 7.4.3.2 "Sequence parameter set RBSP
+    semantics" of the specification.
+
+.. c:type:: v4l2_ctrl_hevc_sps
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_hevc_sps
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u16
+      - ``pic_width_in_luma_samples``
+      -
+    * - __u16
+      - ``pic_height_in_luma_samples``
+      -
+    * - __u8
+      - ``bit_depth_luma_minus8``
+      -
+    * - __u8
+      - ``bit_depth_chroma_minus8``
+      -
+    * - __u8
+      - ``log2_max_pic_order_cnt_lsb_minus4``
+      -
+    * - __u8
+      - ``sps_max_dec_pic_buffering_minus1``
+      -
+    * - __u8
+      - ``sps_max_num_reorder_pics``
+      -
+    * - __u8
+      - ``sps_max_latency_increase_plus1``
+      -
+    * - __u8
+      - ``log2_min_luma_coding_block_size_minus3``
+      -
+    * - __u8
+      - ``log2_diff_max_min_luma_coding_block_size``
+      -
+    * - __u8
+      - ``log2_min_luma_transform_block_size_minus2``
+      -
+    * - __u8
+      - ``log2_diff_max_min_luma_transform_block_size``
+      -
+    * - __u8
+      - ``max_transform_hierarchy_depth_inter``
+      -
+    * - __u8
+      - ``max_transform_hierarchy_depth_intra``
+      -
+    * - __u8
+      - ``pcm_sample_bit_depth_luma_minus1``
+      -
+    * - __u8
+      - ``pcm_sample_bit_depth_chroma_minus1``
+      -
+    * - __u8
+      - ``log2_min_pcm_luma_coding_block_size_minus3``
+      -
+    * - __u8
+      - ``log2_diff_max_min_pcm_luma_coding_block_size``
+      -
+    * - __u8
+      - ``num_short_term_ref_pic_sets``
+      -
+    * - __u8
+      - ``num_long_term_ref_pics_sps``
+      -
+    * - __u8
+      - ``chroma_format_idc``
+      -
+    * - __u64
+      - ``flags``
+      - See :ref:`Sequence Parameter Set Flags <hevc_sps_flags>`
+
+.. _hevc_sps_flags:
+
+``Sequence Parameter Set Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE``
+      - 0x00000001
+      -
+    * - ``V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED``
+      - 0x00000002
+      -
+    * - ``V4L2_HEVC_SPS_FLAG_AMP_ENABLED``
+      - 0x00000004
+      -
+    * - ``V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET``
+      - 0x00000008
+      -
+    * - ``V4L2_HEVC_SPS_FLAG_PCM_ENABLED``
+      - 0x00000010
+      -
+    * - ``V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED``
+      - 0x00000020
+      -
+    * - ``V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT``
+      - 0x00000040
+      -
+    * - ``V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED``
+      - 0x00000080
+      -
+    * - ``V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED``
+      - 0x00000100
+      -
+
+``V4L2_CID_MPEG_VIDEO_HEVC_PPS (struct)``
+    Specifies the Picture Parameter Set fields (as extracted from the
+    bitstream) for the associated HEVC slice data.
+    These bitstream parameters are defined according to :ref:`hevc`.
+    They are described in section 7.4.3.3 "Picture parameter set RBSP
+    semantics" of the specification.
+
+.. c:type:: v4l2_ctrl_hevc_pps
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_hevc_pps
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``num_extra_slice_header_bits``
+      -
+    * - __s8
+      - ``init_qp_minus26``
+      -
+    * - __u8
+      - ``diff_cu_qp_delta_depth``
+      -
+    * - __s8
+      - ``pps_cb_qp_offset``
+      -
+    * - __s8
+      - ``pps_cr_qp_offset``
+      -
+    * - __u8
+      - ``num_tile_columns_minus1``
+      -
+    * - __u8
+      - ``num_tile_rows_minus1``
+      -
+    * - __u8
+      - ``column_width_minus1[20]``
+      -
+    * - __u8
+      - ``row_height_minus1[22]``
+      -
+    * - __s8
+      - ``pps_beta_offset_div2``
+      -
+    * - __s8
+      - ``pps_tc_offset_div2``
+      -
+    * - __u8
+      - ``log2_parallel_merge_level_minus2``
+      -
+    * - __u8
+      - ``padding[4]``
+      - Applications and drivers must set this to zero.
+    * - __u64
+      - ``flags``
+      - See :ref:`Picture Parameter Set Flags <hevc_pps_flags>`
+
+.. _hevc_pps_flags:
+
+``Picture Parameter Set Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT_ENABLED``
+      - 0x00000001
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT``
+      - 0x00000002
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED``
+      - 0x00000004
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT``
+      - 0x00000008
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED``
+      - 0x00000010
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED``
+      - 0x00000020
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED``
+      - 0x00000040
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT``
+      - 0x00000080
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED``
+      - 0x00000100
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED``
+      - 0x00000200
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED``
+      - 0x00000400
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_TILES_ENABLED``
+      - 0x00000800
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED``
+      - 0x00001000
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED``
+      - 0x00002000
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED``
+      - 0x00004000
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED``
+      - 0x00008000
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER``
+      - 0x00010000
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT``
+      - 0x00020000
+      -
+    * - ``V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT``
+      - 0x00040000
+      -
+
+``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (struct)``
+    Specifies various slice-specific parameters, especially from the NAL unit
+    header, general slice segment header and weighted prediction parameter
+    parts of the bitstream.
+    These bitstream parameters are defined according to :ref:`hevc`.
+    They are described in section 7.4.7 "General slice segment header
+    semantics" of the specification.
+
+.. c:type:: v4l2_ctrl_hevc_slice_params
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_hevc_slice_params
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``bit_size``
+      - Size (in bits) of the current slice data.
+    * - __u32
+      - ``data_bit_offset``
+      - Offset (in bits) to the video data in the current slice data.
+    * - __u8
+      - ``nal_unit_type``
+      -
+    * - __u8
+      - ``nuh_temporal_id_plus1``
+      -
+    * - __u8
+      - ``slice_type``
+      -
+	(V4L2_HEVC_SLICE_TYPE_I, V4L2_HEVC_SLICE_TYPE_P or
+	V4L2_HEVC_SLICE_TYPE_B).
+    * - __u8
+      - ``colour_plane_id``
+      -
+    * - __u16
+      - ``slice_pic_order_cnt``
+      -
+    * - __u8
+      - ``num_ref_idx_l0_active_minus1``
+      -
+    * - __u8
+      - ``num_ref_idx_l1_active_minus1``
+      -
+    * - __u8
+      - ``collocated_ref_idx``
+      -
+    * - __u8
+      - ``five_minus_max_num_merge_cand``
+      -
+    * - __s8
+      - ``slice_qp_delta``
+      -
+    * - __s8
+      - ``slice_cb_qp_offset``
+      -
+    * - __s8
+      - ``slice_cr_qp_offset``
+      -
+    * - __s8
+      - ``slice_act_y_qp_offset``
+      -
+    * - __s8
+      - ``slice_act_cb_qp_offset``
+      -
+    * - __s8
+      - ``slice_act_cr_qp_offset``
+      -
+    * - __s8
+      - ``slice_beta_offset_div2``
+      -
+    * - __s8
+      - ``slice_tc_offset_div2``
+      -
+    * - __u8
+      - ``pic_struct``
+      -
+    * - __u8
+      - ``num_active_dpb_entries``
+      - The number of entries in ``dpb``.
+    * - __u8
+      - ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
+      - The list of L0 reference elements as indices in the DPB.
+    * - __u8
+      - ``ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
+      - The list of L1 reference elements as indices in the DPB.
+    * - __u8
+      - ``num_rps_poc_st_curr_before``
+      - The number of reference pictures in the short-term set that come before
+        the current frame.
+    * - __u8
+      - ``num_rps_poc_st_curr_after``
+      - The number of reference pictures in the short-term set that come after
+        the current frame.
+    * - __u8
+      - ``num_rps_poc_lt_curr``
+      - The number of reference pictures in the long-term set.
+    * - __u8
+      - ``padding[7]``
+      - Applications and drivers must set this to zero.
+    * - struct :c:type:`v4l2_hevc_dpb_entry`
+      - ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
+      - The decoded picture buffer, for meta-data about reference frames.
+    * - struct :c:type:`v4l2_hevc_pred_weight_table`
+      - ``pred_weight_table``
+      - The prediction weight coefficients for inter-picture prediction.
+    * - __u64
+      - ``flags``
+      - See :ref:`Slice Parameters Flags <hevc_slice_params_flags>`
+
+.. _hevc_slice_params_flags:
+
+``Slice Parameters Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA``
+      - 0x00000001
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA``
+      - 0x00000002
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED``
+      - 0x00000004
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO``
+      - 0x00000008
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT``
+      - 0x00000010
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0``
+      - 0x00000020
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV``
+      - 0x00000040
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED``
+      - 0x00000080
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED``
+      - 0x00000100
+      -
+    * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_DEPENDENT_SLICE_SEGMENT``
+      - 0x00000200
+      -
+
+.. c:type:: v4l2_hevc_dpb_entry
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_hevc_dpb_entry
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u64
+      - ``timestamp``
+      - Timestamp of the V4L2 capture buffer to use as reference, used
+        with B-coded and P-coded frames. The timestamp refers to the
+	``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
+	:c:func:`v4l2_timeval_to_ns()` function to convert the struct
+	:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
+    * - __u8
+      - ``rps``
+      - The reference set for the reference frame
+        (V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_BEFORE,
+        V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_AFTER or
+        V4L2_HEVC_DPB_ENTRY_RPS_LT_CURR)
+    * - __u8
+      - ``field_pic``
+      - Whether the reference is a field picture or a frame.
+    * - __u16
+      - ``pic_order_cnt[2]``
+      - The picture order count of the reference. Only the first element of the
+        array is used for frame pictures, while the first element identifies the
+        top field and the second the bottom field in field-coded pictures.
+    * - __u8
+      - ``padding[2]``
+      - Applications and drivers must set this to zero.
+
+.. c:type:: v4l2_hevc_pred_weight_table
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_hevc_pred_weight_table
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``luma_log2_weight_denom``
+      -
+    * - __s8
+      - ``delta_chroma_log2_weight_denom``
+      -
+    * - __s8
+      - ``delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
+      -
+    * - __s8
+      - ``luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
+      -
+    * - __s8
+      - ``delta_chroma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
+      -
+    * - __s8
+      - ``chroma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
+      -
+    * - __s8
+      - ``delta_luma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
+      -
+    * - __s8
+      - ``luma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
+      -
+    * - __s8
+      - ``delta_chroma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
+      -
+    * - __s8
+      - ``chroma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
+      -
+    * - __u8
+      - ``padding[6]``
+      - Applications and drivers must set this to zero.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (enum)``
+    Specifies the decoding mode to use. Currently exposes slice-based and
+    frame-based decoding but new modes might be added later on.
+    This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE
+    pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE
+    are required to set this control in order to specify the decoding mode
+    that is expected for the buffer.
+    Drivers may expose a single or multiple decoding modes, depending
+    on what they can support.
+
+    .. note::
+
+       This menu control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_mpeg_video_hevc_decode_mode
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_SLICE_BASED``
+      - 0
+      - Decoding is done at the slice granularity.
+        The OUTPUT buffer must contain a single slice.
+    * - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_FRAME_BASED``
+      - 1
+      - Decoding is done at the frame granularity.
+        The OUTPUT buffer must contain all slices needed to decode the
+        frame. The OUTPUT buffer must also contain both fields.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (enum)``
+    Specifies the HEVC slice start code expected for each slice.
+    This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE
+    pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE
+    are required to set this control in order to specify the start code
+    that is expected for the buffer.
+    Drivers may expose a single or multiple start codes, depending
+    on what they can support.
+
+    .. note::
+
+       This menu control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_mpeg_video_hevc_start_code
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_NONE``
+      - 0
+      - Selecting this value specifies that HEVC slices are passed
+        to the driver without any start code.
+    * - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_ANNEX_B``
+      - 1
+      - Selecting this value specifies that HEVC slices are expected
+        to be prefixed by Annex B start codes. According to :ref:`hevc`
+        valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-detect.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-detect.rst
new file mode 100644
index 000000000..312c4fa94
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-detect.rst
@@ -0,0 +1,64 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _detect-controls:
+
+************************
+Detect Control Reference
+************************
+
+The Detect class includes controls for common features of various motion
+or object detection capable devices.
+
+
+.. _detect-control-id:
+
+Detect Control IDs
+==================
+
+``V4L2_CID_DETECT_CLASS (class)``
+    The Detect class descriptor. Calling
+    :ref:`VIDIOC_QUERYCTRL` for this control will
+    return a description of this control class.
+
+``V4L2_CID_DETECT_MD_MODE (menu)``
+    Sets the motion detection mode.
+
+.. tabularcolumns:: |p{7.7cm}|p{9.8cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_DETECT_MD_MODE_DISABLED``
+      - Disable motion detection.
+    * - ``V4L2_DETECT_MD_MODE_GLOBAL``
+      - Use a single motion detection threshold.
+    * - ``V4L2_DETECT_MD_MODE_THRESHOLD_GRID``
+      - The image is divided into a grid, each cell with its own motion
+	detection threshold. These thresholds are set through the
+	``V4L2_CID_DETECT_MD_THRESHOLD_GRID`` matrix control.
+    * - ``V4L2_DETECT_MD_MODE_REGION_GRID``
+      - The image is divided into a grid, each cell with its own region
+	value that specifies which per-region motion detection thresholds
+	should be used. Each region has its own thresholds. How these
+	per-region thresholds are set up is driver-specific. The region
+	values for the grid are set through the
+	``V4L2_CID_DETECT_MD_REGION_GRID`` matrix control.
+
+
+
+``V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD (integer)``
+    Sets the global motion detection threshold to be used with the
+    ``V4L2_DETECT_MD_MODE_GLOBAL`` motion detection mode.
+
+``V4L2_CID_DETECT_MD_THRESHOLD_GRID (__u16 matrix)``
+    Sets the motion detection thresholds for each cell in the grid. To
+    be used with the ``V4L2_DETECT_MD_MODE_THRESHOLD_GRID`` motion
+    detection mode. Matrix element (0, 0) represents the cell at the
+    top-left of the grid.
+
+``V4L2_CID_DETECT_MD_REGION_GRID (__u8 matrix)``
+    Sets the motion detection region value for each cell in the grid. To
+    be used with the ``V4L2_DETECT_MD_MODE_REGION_GRID`` motion
+    detection mode. Matrix element (0, 0) represents the cell at the
+    top-left of the grid.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-dv.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-dv.rst
new file mode 100644
index 000000000..a6f696bf8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-dv.rst
@@ -0,0 +1,159 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _dv-controls:
+
+*******************************
+Digital Video Control Reference
+*******************************
+
+The Digital Video control class is intended to control receivers and
+transmitters for `VGA <http://en.wikipedia.org/wiki/Vga>`__,
+`DVI <http://en.wikipedia.org/wiki/Digital_Visual_Interface>`__
+(Digital Visual Interface), HDMI (:ref:`hdmi`) and DisplayPort
+(:ref:`dp`). These controls are generally expected to be private to
+the receiver or transmitter subdevice that implements them, so they are
+only exposed on the ``/dev/v4l-subdev*`` device node.
+
+.. note::
+
+   Note that these devices can have multiple input or output pads which are
+   hooked up to e.g. HDMI connectors. Even though the subdevice will
+   receive or transmit video from/to only one of those pads, the other pads
+   can still be active when it comes to EDID (Extended Display
+   Identification Data, :ref:`vesaedid`) and HDCP (High-bandwidth Digital
+   Content Protection System, :ref:`hdcp`) processing, allowing the
+   device to do the fairly slow EDID/HDCP handling in advance. This allows
+   for quick switching between connectors.
+
+These pads appear in several of the controls in this section as
+bitmasks, one bit for each pad. Bit 0 corresponds to pad 0, bit 1 to pad
+1, etc. The maximum value of the control is the set of valid pads.
+
+
+.. _dv-control-id:
+
+Digital Video Control IDs
+=========================
+
+``V4L2_CID_DV_CLASS (class)``
+    The Digital Video class descriptor.
+
+``V4L2_CID_DV_TX_HOTPLUG (bitmask)``
+    Many connectors have a hotplug pin which is high if EDID information
+    is available from the source. This control shows the state of the
+    hotplug pin as seen by the transmitter. Each bit corresponds to an
+    output pad on the transmitter. If an output pad does not have an
+    associated hotplug pin, then the bit for that pad will be 0. This
+    read-only control is applicable to DVI-D, HDMI and DisplayPort
+    connectors.
+
+``V4L2_CID_DV_TX_RXSENSE (bitmask)``
+    Rx Sense is the detection of pull-ups on the TMDS clock lines. This
+    normally means that the sink has left/entered standby (i.e. the
+    transmitter can sense that the receiver is ready to receive video).
+    Each bit corresponds to an output pad on the transmitter. If an
+    output pad does not have an associated Rx Sense, then the bit for
+    that pad will be 0. This read-only control is applicable to DVI-D
+    and HDMI devices.
+
+``V4L2_CID_DV_TX_EDID_PRESENT (bitmask)``
+    When the transmitter sees the hotplug signal from the receiver it
+    will attempt to read the EDID. If set, then the transmitter has read
+    at least the first block (= 128 bytes). Each bit corresponds to an
+    output pad on the transmitter. If an output pad does not support
+    EDIDs, then the bit for that pad will be 0. This read-only control
+    is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors.
+
+``V4L2_CID_DV_TX_MODE``
+    (enum)
+
+enum v4l2_dv_tx_mode -
+    HDMI transmitters can transmit in DVI-D mode (just video) or in HDMI
+    mode (video + audio + auxiliary data). This control selects which
+    mode to use: V4L2_DV_TX_MODE_DVI_D or V4L2_DV_TX_MODE_HDMI.
+    This control is applicable to HDMI connectors.
+
+``V4L2_CID_DV_TX_RGB_RANGE``
+    (enum)
+
+enum v4l2_dv_rgb_range -
+    Select the quantization range for RGB output. V4L2_DV_RANGE_AUTO
+    follows the RGB quantization range specified in the standard for the
+    video interface (ie. :ref:`cea861` for HDMI).
+    V4L2_DV_RANGE_LIMITED and V4L2_DV_RANGE_FULL override the
+    standard to be compatible with sinks that have not implemented the
+    standard correctly (unfortunately quite common for HDMI and DVI-D).
+    Full range allows all possible values to be used whereas limited
+    range sets the range to (16 << (N-8)) - (235 << (N-8)) where N is
+    the number of bits per component. This control is applicable to VGA,
+    DVI-A/D, HDMI and DisplayPort connectors.
+
+``V4L2_CID_DV_TX_IT_CONTENT_TYPE``
+    (enum)
+
+enum v4l2_dv_it_content_type -
+    Configures the IT Content Type of the transmitted video. This
+    information is sent over HDMI and DisplayPort connectors as part of
+    the AVI InfoFrame. The term 'IT Content' is used for content that
+    originates from a computer as opposed to content from a TV broadcast
+    or an analog source. The enum v4l2_dv_it_content_type defines
+    the possible content types:
+
+.. tabularcolumns:: |p{7.3cm}|p{10.4cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_DV_IT_CONTENT_TYPE_GRAPHICS``
+      - Graphics content. Pixel data should be passed unfiltered and
+	without analog reconstruction.
+    * - ``V4L2_DV_IT_CONTENT_TYPE_PHOTO``
+      - Photo content. The content is derived from digital still pictures.
+	The content should be passed through with minimal scaling and
+	picture enhancements.
+    * - ``V4L2_DV_IT_CONTENT_TYPE_CINEMA``
+      - Cinema content.
+    * - ``V4L2_DV_IT_CONTENT_TYPE_GAME``
+      - Game content. Audio and video latency should be minimized.
+    * - ``V4L2_DV_IT_CONTENT_TYPE_NO_ITC``
+      - No IT Content information is available and the ITC bit in the AVI
+	InfoFrame is set to 0.
+
+
+
+``V4L2_CID_DV_RX_POWER_PRESENT (bitmask)``
+    Detects whether the receiver receives power from the source (e.g.
+    HDMI carries 5V on one of the pins). This is often used to power an
+    eeprom which contains EDID information, such that the source can
+    read the EDID even if the sink is in standby/power off. Each bit
+    corresponds to an input pad on the receiver. If an input pad
+    cannot detect whether power is present, then the bit for that pad
+    will be 0. This read-only control is applicable to DVI-D, HDMI and
+    DisplayPort connectors.
+
+``V4L2_CID_DV_RX_RGB_RANGE``
+    (enum)
+
+enum v4l2_dv_rgb_range -
+    Select the quantization range for RGB input. V4L2_DV_RANGE_AUTO
+    follows the RGB quantization range specified in the standard for the
+    video interface (ie. :ref:`cea861` for HDMI).
+    V4L2_DV_RANGE_LIMITED and V4L2_DV_RANGE_FULL override the
+    standard to be compatible with sources that have not implemented the
+    standard correctly (unfortunately quite common for HDMI and DVI-D).
+    Full range allows all possible values to be used whereas limited
+    range sets the range to (16 << (N-8)) - (235 << (N-8)) where N is
+    the number of bits per component. This control is applicable to VGA,
+    DVI-A/D, HDMI and DisplayPort connectors.
+
+``V4L2_CID_DV_RX_IT_CONTENT_TYPE``
+    (enum)
+
+enum v4l2_dv_it_content_type -
+    Reads the IT Content Type of the received video. This information is
+    sent over HDMI and DisplayPort connectors as part of the AVI
+    InfoFrame. The term 'IT Content' is used for content that originates
+    from a computer as opposed to content from a TV broadcast or an
+    analog source. See ``V4L2_CID_DV_TX_IT_CONTENT_TYPE`` for the
+    available content types.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-flash.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-flash.rst
new file mode 100644
index 000000000..ad4b878cd
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-flash.rst
@@ -0,0 +1,185 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _flash-controls:
+
+***********************
+Flash Control Reference
+***********************
+
+The V4L2 flash controls are intended to provide generic access to flash
+controller devices. Flash controller devices are typically used in
+digital cameras.
+
+The interface can support both LED and xenon flash devices. As of
+writing this, there is no xenon flash driver using this interface.
+
+
+.. _flash-controls-use-cases:
+
+Supported use cases
+===================
+
+
+Unsynchronised LED flash (software strobe)
+------------------------------------------
+
+Unsynchronised LED flash is controlled directly by the host as the
+sensor. The flash must be enabled by the host before the exposure of the
+image starts and disabled once it ends. The host is fully responsible
+for the timing of the flash.
+
+Example of such device: Nokia N900.
+
+
+Synchronised LED flash (hardware strobe)
+----------------------------------------
+
+The synchronised LED flash is pre-programmed by the host (power and
+timeout) but controlled by the sensor through a strobe signal from the
+sensor to the flash.
+
+The sensor controls the flash duration and timing. This information
+typically must be made available to the sensor.
+
+
+LED flash as torch
+------------------
+
+LED flash may be used as torch in conjunction with another use case
+involving camera or individually.
+
+
+.. _flash-control-id:
+
+Flash Control IDs
+-----------------
+
+``V4L2_CID_FLASH_CLASS (class)``
+    The FLASH class descriptor.
+
+``V4L2_CID_FLASH_LED_MODE (menu)``
+    Defines the mode of the flash LED, the high-power white LED attached
+    to the flash controller. Setting this control may not be possible in
+    presence of some faults. See V4L2_CID_FLASH_FAULT.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_FLASH_LED_MODE_NONE``
+      - Off.
+    * - ``V4L2_FLASH_LED_MODE_FLASH``
+      - Flash mode.
+    * - ``V4L2_FLASH_LED_MODE_TORCH``
+      - Torch mode. See V4L2_CID_FLASH_TORCH_INTENSITY.
+
+
+
+``V4L2_CID_FLASH_STROBE_SOURCE (menu)``
+    Defines the source of the flash LED strobe.
+
+.. tabularcolumns:: |p{7.5cm}|p{10.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_FLASH_STROBE_SOURCE_SOFTWARE``
+      - The flash strobe is triggered by using the
+	V4L2_CID_FLASH_STROBE control.
+    * - ``V4L2_FLASH_STROBE_SOURCE_EXTERNAL``
+      - The flash strobe is triggered by an external source. Typically
+	this is a sensor, which makes it possible to synchronise the
+	flash strobe start to exposure start.
+
+
+
+``V4L2_CID_FLASH_STROBE (button)``
+    Strobe flash. Valid when V4L2_CID_FLASH_LED_MODE is set to
+    V4L2_FLASH_LED_MODE_FLASH and V4L2_CID_FLASH_STROBE_SOURCE
+    is set to V4L2_FLASH_STROBE_SOURCE_SOFTWARE. Setting this
+    control may not be possible in presence of some faults. See
+    V4L2_CID_FLASH_FAULT.
+
+``V4L2_CID_FLASH_STROBE_STOP (button)``
+    Stop flash strobe immediately.
+
+``V4L2_CID_FLASH_STROBE_STATUS (boolean)``
+    Strobe status: whether the flash is strobing at the moment or not.
+    This is a read-only control.
+
+``V4L2_CID_FLASH_TIMEOUT (integer)``
+    Hardware timeout for flash. The flash strobe is stopped after this
+    period of time has passed from the start of the strobe.
+
+``V4L2_CID_FLASH_INTENSITY (integer)``
+    Intensity of the flash strobe when the flash LED is in flash mode
+    (V4L2_FLASH_LED_MODE_FLASH). The unit should be milliamps (mA)
+    if possible.
+
+``V4L2_CID_FLASH_TORCH_INTENSITY (integer)``
+    Intensity of the flash LED in torch mode
+    (V4L2_FLASH_LED_MODE_TORCH). The unit should be milliamps (mA)
+    if possible. Setting this control may not be possible in presence of
+    some faults. See V4L2_CID_FLASH_FAULT.
+
+``V4L2_CID_FLASH_INDICATOR_INTENSITY (integer)``
+    Intensity of the indicator LED. The indicator LED may be fully
+    independent of the flash LED. The unit should be microamps (uA) if
+    possible.
+
+``V4L2_CID_FLASH_FAULT (bitmask)``
+    Faults related to the flash. The faults tell about specific problems
+    in the flash chip itself or the LEDs attached to it. Faults may
+    prevent further use of some of the flash controls. In particular,
+    V4L2_CID_FLASH_LED_MODE is set to V4L2_FLASH_LED_MODE_NONE
+    if the fault affects the flash LED. Exactly which faults have such
+    an effect is chip dependent. Reading the faults resets the control
+    and returns the chip to a usable state if possible.
+
+.. tabularcolumns:: |p{8.4cm}|p{9.1cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_FLASH_FAULT_OVER_VOLTAGE``
+      - Flash controller voltage to the flash LED has exceeded the limit
+	specific to the flash controller.
+    * - ``V4L2_FLASH_FAULT_TIMEOUT``
+      - The flash strobe was still on when the timeout set by the user ---
+	V4L2_CID_FLASH_TIMEOUT control --- has expired. Not all flash
+	controllers may set this in all such conditions.
+    * - ``V4L2_FLASH_FAULT_OVER_TEMPERATURE``
+      - The flash controller has overheated.
+    * - ``V4L2_FLASH_FAULT_SHORT_CIRCUIT``
+      - The short circuit protection of the flash controller has been
+	triggered.
+    * - ``V4L2_FLASH_FAULT_OVER_CURRENT``
+      - Current in the LED power supply has exceeded the limit specific to
+	the flash controller.
+    * - ``V4L2_FLASH_FAULT_INDICATOR``
+      - The flash controller has detected a short or open circuit
+	condition on the indicator LED.
+    * - ``V4L2_FLASH_FAULT_UNDER_VOLTAGE``
+      - Flash controller voltage to the flash LED has been below the
+	minimum limit specific to the flash controller.
+    * - ``V4L2_FLASH_FAULT_INPUT_VOLTAGE``
+      - The input voltage of the flash controller is below the limit under
+	which strobing the flash at full current will not be possible.The
+	condition persists until this flag is no longer set.
+    * - ``V4L2_FLASH_FAULT_LED_OVER_TEMPERATURE``
+      - The temperature of the LED has exceeded its allowed upper limit.
+
+
+
+``V4L2_CID_FLASH_CHARGE (boolean)``
+    Enable or disable charging of the xenon flash capacitor.
+
+``V4L2_CID_FLASH_READY (boolean)``
+    Is the flash ready to strobe? Xenon flashes require their capacitors
+    charged before strobing. LED flashes often require a cooldown period
+    after strobe during which another strobe will not be possible. This
+    is a read-only control.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-fm-rx.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-fm-rx.rst
new file mode 100644
index 000000000..b6cfc0e82
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-fm-rx.rst
@@ -0,0 +1,88 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _fm-rx-controls:
+
+*****************************
+FM Receiver Control Reference
+*****************************
+
+The FM Receiver (FM_RX) class includes controls for common features of
+FM Reception capable devices.
+
+
+.. _fm-rx-control-id:
+
+FM_RX Control IDs
+=================
+
+``V4L2_CID_FM_RX_CLASS (class)``
+    The FM_RX class descriptor. Calling
+    :ref:`VIDIOC_QUERYCTRL` for this control will
+    return a description of this control class.
+
+``V4L2_CID_RDS_RECEPTION (boolean)``
+    Enables/disables RDS reception by the radio tuner
+
+``V4L2_CID_RDS_RX_PTY (integer)``
+    Gets RDS Programme Type field. This encodes up to 31 pre-defined
+    programme types.
+
+``V4L2_CID_RDS_RX_PS_NAME (string)``
+    Gets the Programme Service name (PS_NAME). It is intended for
+    static display on a receiver. It is the primary aid to listeners in
+    programme service identification and selection. In Annex E of
+    :ref:`iec62106`, the RDS specification, there is a full
+    description of the correct character encoding for Programme Service
+    name strings. Also from RDS specification, PS is usually a single
+    eight character text. However, it is also possible to find receivers
+    which can scroll strings sized as 8 x N characters. So, this control
+    must be configured with steps of 8 characters. The result is it must
+    always contain a string with size multiple of 8.
+
+``V4L2_CID_RDS_RX_RADIO_TEXT (string)``
+    Gets the Radio Text info. It is a textual description of what is
+    being broadcasted. RDS Radio Text can be applied when broadcaster
+    wishes to transmit longer PS names, programme-related information or
+    any other text. In these cases, RadioText can be used in addition to
+    ``V4L2_CID_RDS_RX_PS_NAME``. The encoding for Radio Text strings is
+    also fully described in Annex E of :ref:`iec62106`. The length of
+    Radio Text strings depends on which RDS Block is being used to
+    transmit it, either 32 (2A block) or 64 (2B block). However, it is
+    also possible to find receivers which can scroll strings sized as 32
+    x N or 64 x N characters. So, this control must be configured with
+    steps of 32 or 64 characters. The result is it must always contain a
+    string with size multiple of 32 or 64.
+
+``V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT (boolean)``
+    If set, then a traffic announcement is in progress.
+
+``V4L2_CID_RDS_RX_TRAFFIC_PROGRAM (boolean)``
+    If set, then the tuned programme carries traffic announcements.
+
+``V4L2_CID_RDS_RX_MUSIC_SPEECH (boolean)``
+    If set, then this channel broadcasts music. If cleared, then it
+    broadcasts speech. If the transmitter doesn't make this distinction,
+    then it will be set.
+
+``V4L2_CID_TUNE_DEEMPHASIS``
+    (enum)
+
+enum v4l2_deemphasis -
+    Configures the de-emphasis value for reception. A de-emphasis filter
+    is applied to the broadcast to accentuate the high audio
+    frequencies. Depending on the region, a time constant of either 50
+    or 75 useconds is used. The enum v4l2_deemphasis defines possible
+    values for de-emphasis. Here they are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_DEEMPHASIS_DISABLED``
+      - No de-emphasis is applied.
+    * - ``V4L2_DEEMPHASIS_50_uS``
+      - A de-emphasis of 50 uS is used.
+    * - ``V4L2_DEEMPHASIS_75_uS``
+      - A de-emphasis of 75 uS is used.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst
new file mode 100644
index 000000000..04c997c9a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst
@@ -0,0 +1,181 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _fm-tx-controls:
+
+********************************
+FM Transmitter Control Reference
+********************************
+
+The FM Transmitter (FM_TX) class includes controls for common features
+of FM transmissions capable devices. Currently this class includes
+parameters for audio compression, pilot tone generation, audio deviation
+limiter, RDS transmission and tuning power features.
+
+
+.. _fm-tx-control-id:
+
+FM_TX Control IDs
+=================
+
+``V4L2_CID_FM_TX_CLASS (class)``
+    The FM_TX class descriptor. Calling
+    :ref:`VIDIOC_QUERYCTRL` for this control will
+    return a description of this control class.
+
+``V4L2_CID_RDS_TX_DEVIATION (integer)``
+    Configures RDS signal frequency deviation level in Hz. The range and
+    step are driver-specific.
+
+``V4L2_CID_RDS_TX_PI (integer)``
+    Sets the RDS Programme Identification field for transmission.
+
+``V4L2_CID_RDS_TX_PTY (integer)``
+    Sets the RDS Programme Type field for transmission. This encodes up
+    to 31 pre-defined programme types.
+
+``V4L2_CID_RDS_TX_PS_NAME (string)``
+    Sets the Programme Service name (PS_NAME) for transmission. It is
+    intended for static display on a receiver. It is the primary aid to
+    listeners in programme service identification and selection. In
+    Annex E of :ref:`iec62106`, the RDS specification, there is a full
+    description of the correct character encoding for Programme Service
+    name strings. Also from RDS specification, PS is usually a single
+    eight character text. However, it is also possible to find receivers
+    which can scroll strings sized as 8 x N characters. So, this control
+    must be configured with steps of 8 characters. The result is it must
+    always contain a string with size multiple of 8.
+
+``V4L2_CID_RDS_TX_RADIO_TEXT (string)``
+    Sets the Radio Text info for transmission. It is a textual
+    description of what is being broadcasted. RDS Radio Text can be
+    applied when broadcaster wishes to transmit longer PS names,
+    programme-related information or any other text. In these cases,
+    RadioText should be used in addition to ``V4L2_CID_RDS_TX_PS_NAME``.
+    The encoding for Radio Text strings is also fully described in Annex
+    E of :ref:`iec62106`. The length of Radio Text strings depends on
+    which RDS Block is being used to transmit it, either 32 (2A block)
+    or 64 (2B block). However, it is also possible to find receivers
+    which can scroll strings sized as 32 x N or 64 x N characters. So,
+    this control must be configured with steps of 32 or 64 characters.
+    The result is it must always contain a string with size multiple of
+    32 or 64.
+
+``V4L2_CID_RDS_TX_MONO_STEREO (boolean)``
+    Sets the Mono/Stereo bit of the Decoder Identification code. If set,
+    then the audio was recorded as stereo.
+
+``V4L2_CID_RDS_TX_ARTIFICIAL_HEAD (boolean)``
+    Sets the
+    `Artificial Head <http://en.wikipedia.org/wiki/Artificial_head>`__
+    bit of the Decoder Identification code. If set, then the audio was
+    recorded using an artificial head.
+
+``V4L2_CID_RDS_TX_COMPRESSED (boolean)``
+    Sets the Compressed bit of the Decoder Identification code. If set,
+    then the audio is compressed.
+
+``V4L2_CID_RDS_TX_DYNAMIC_PTY (boolean)``
+    Sets the Dynamic PTY bit of the Decoder Identification code. If set,
+    then the PTY code is dynamically switched.
+
+``V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT (boolean)``
+    If set, then a traffic announcement is in progress.
+
+``V4L2_CID_RDS_TX_TRAFFIC_PROGRAM (boolean)``
+    If set, then the tuned programme carries traffic announcements.
+
+``V4L2_CID_RDS_TX_MUSIC_SPEECH (boolean)``
+    If set, then this channel broadcasts music. If cleared, then it
+    broadcasts speech. If the transmitter doesn't make this distinction,
+    then it should be set.
+
+``V4L2_CID_RDS_TX_ALT_FREQS_ENABLE (boolean)``
+    If set, then transmit alternate frequencies.
+
+``V4L2_CID_RDS_TX_ALT_FREQS (__u32 array)``
+    The alternate frequencies in kHz units. The RDS standard allows for
+    up to 25 frequencies to be defined. Drivers may support fewer
+    frequencies so check the array size.
+
+``V4L2_CID_AUDIO_LIMITER_ENABLED (boolean)``
+    Enables or disables the audio deviation limiter feature. The limiter
+    is useful when trying to maximize the audio volume, minimize
+    receiver-generated distortion and prevent overmodulation.
+
+``V4L2_CID_AUDIO_LIMITER_RELEASE_TIME (integer)``
+    Sets the audio deviation limiter feature release time. Unit is in
+    useconds. Step and range are driver-specific.
+
+``V4L2_CID_AUDIO_LIMITER_DEVIATION (integer)``
+    Configures audio frequency deviation level in Hz. The range and step
+    are driver-specific.
+
+``V4L2_CID_AUDIO_COMPRESSION_ENABLED (boolean)``
+    Enables or disables the audio compression feature. This feature
+    amplifies signals below the threshold by a fixed gain and compresses
+    audio signals above the threshold by the ratio of Threshold/(Gain +
+    Threshold).
+
+``V4L2_CID_AUDIO_COMPRESSION_GAIN (integer)``
+    Sets the gain for audio compression feature. It is a dB value. The
+    range and step are driver-specific.
+
+``V4L2_CID_AUDIO_COMPRESSION_THRESHOLD (integer)``
+    Sets the threshold level for audio compression freature. It is a dB
+    value. The range and step are driver-specific.
+
+``V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME (integer)``
+    Sets the attack time for audio compression feature. It is a useconds
+    value. The range and step are driver-specific.
+
+``V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME (integer)``
+    Sets the release time for audio compression feature. It is a
+    useconds value. The range and step are driver-specific.
+
+``V4L2_CID_PILOT_TONE_ENABLED (boolean)``
+    Enables or disables the pilot tone generation feature.
+
+``V4L2_CID_PILOT_TONE_DEVIATION (integer)``
+    Configures pilot tone frequency deviation level. Unit is in Hz. The
+    range and step are driver-specific.
+
+``V4L2_CID_PILOT_TONE_FREQUENCY (integer)``
+    Configures pilot tone frequency value. Unit is in Hz. The range and
+    step are driver-specific.
+
+``V4L2_CID_TUNE_PREEMPHASIS``
+    (enum)
+
+enum v4l2_preemphasis -
+    Configures the pre-emphasis value for broadcasting. A pre-emphasis
+    filter is applied to the broadcast to accentuate the high audio
+    frequencies. Depending on the region, a time constant of either 50
+    or 75 useconds is used. The enum v4l2_preemphasis defines possible
+    values for pre-emphasis. Here they are:
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_PREEMPHASIS_DISABLED``
+      - No pre-emphasis is applied.
+    * - ``V4L2_PREEMPHASIS_50_uS``
+      - A pre-emphasis of 50 uS is used.
+    * - ``V4L2_PREEMPHASIS_75_uS``
+      - A pre-emphasis of 75 uS is used.
+
+
+
+``V4L2_CID_TUNE_POWER_LEVEL (integer)``
+    Sets the output power level for signal transmission. Unit is in
+    dBuV. Range and step are driver-specific.
+
+``V4L2_CID_TUNE_ANTENNA_CAPACITOR (integer)``
+    This selects the value of antenna tuning capacitor manually or
+    automatically if set to zero. Unit, range and step are
+    driver-specific.
+
+For more details about RDS specification, refer to :ref:`iec62106`
+document, from CENELEC.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
new file mode 100644
index 000000000..87698c15c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _image-process-controls:
+
+*******************************
+Image Process Control Reference
+*******************************
+
+The Image Process control class is intended for low-level control of
+image processing functions. Unlike ``V4L2_CID_IMAGE_SOURCE_CLASS``, the
+controls in this class affect processing the image, and do not control
+capturing of it.
+
+
+.. _image-process-control-id:
+
+Image Process Control IDs
+=========================
+
+``V4L2_CID_IMAGE_PROC_CLASS (class)``
+    The IMAGE_PROC class descriptor.
+
+``V4L2_CID_LINK_FREQ (integer menu)``
+    Data bus frequency. Together with the media bus pixel code, bus type
+    (clock cycles per sample), the data bus frequency defines the pixel
+    rate (``V4L2_CID_PIXEL_RATE``) in the pixel array (or possibly
+    elsewhere, if the device is not an image sensor). The frame rate can
+    be calculated from the pixel clock, image width and height and
+    horizontal and vertical blanking. While the pixel rate control may
+    be defined elsewhere than in the subdev containing the pixel array,
+    the frame rate cannot be obtained from that information. This is
+    because only on the pixel array it can be assumed that the vertical
+    and horizontal blanking information is exact: no other blanking is
+    allowed in the pixel array. The selection of frame rate is performed
+    by selecting the desired horizontal and vertical blanking. The unit
+    of this control is Hz.
+
+``V4L2_CID_PIXEL_RATE (64-bit integer)``
+    Pixel rate in the source pads of the subdev. This control is
+    read-only and its unit is pixels / second.
+
+``V4L2_CID_TEST_PATTERN (menu)``
+    Some capture/display/sensor devices have the capability to generate
+    test pattern images. These hardware specific test patterns can be
+    used to test if a device is working properly.
+
+``V4L2_CID_DEINTERLACING_MODE (menu)``
+    The video deinterlacing mode (such as Bob, Weave, ...). The menu items are
+    driver specific and are documented in :ref:`uapi-v4l-drivers`.
+
+``V4L2_CID_DIGITAL_GAIN (integer)``
+    Digital gain is the value by which all colour components
+    are multiplied by. Typically the digital gain applied is the
+    control value divided by e.g. 0x100, meaning that to get no
+    digital gain the control value needs to be 0x100. The no-gain
+    configuration is also typically the default.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-image-source.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-image-source.rst
new file mode 100644
index 000000000..9457dc340
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-image-source.rst
@@ -0,0 +1,60 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _image-source-controls:
+
+******************************
+Image Source Control Reference
+******************************
+
+The Image Source control class is intended for low-level control of
+image source devices such as image sensors. The devices feature an
+analogue to digital converter and a bus transmitter to transmit the
+image data out of the device.
+
+
+.. _image-source-control-id:
+
+Image Source Control IDs
+========================
+
+``V4L2_CID_IMAGE_SOURCE_CLASS (class)``
+    The IMAGE_SOURCE class descriptor.
+
+``V4L2_CID_VBLANK (integer)``
+    Vertical blanking. The idle period after every frame during which no
+    image data is produced. The unit of vertical blanking is a line.
+    Every line has length of the image width plus horizontal blanking at
+    the pixel rate defined by ``V4L2_CID_PIXEL_RATE`` control in the
+    same sub-device.
+
+``V4L2_CID_HBLANK (integer)``
+    Horizontal blanking. The idle period after every line of image data
+    during which no image data is produced. The unit of horizontal
+    blanking is pixels.
+
+``V4L2_CID_ANALOGUE_GAIN (integer)``
+    Analogue gain is gain affecting all colour components in the pixel
+    matrix. The gain operation is performed in the analogue domain
+    before A/D conversion.
+
+``V4L2_CID_TEST_PATTERN_RED (integer)``
+    Test pattern red colour component.
+
+``V4L2_CID_TEST_PATTERN_GREENR (integer)``
+    Test pattern green (next to red) colour component.
+
+``V4L2_CID_TEST_PATTERN_BLUE (integer)``
+    Test pattern blue colour component.
+
+``V4L2_CID_TEST_PATTERN_GREENB (integer)``
+    Test pattern green (next to blue) colour component.
+
+``V4L2_CID_UNIT_CELL_SIZE (struct)``
+    This control returns the unit cell size in nanometers. The struct
+    :c:type:`v4l2_area` provides the width and the height in separate
+    fields to take into consideration asymmetric pixels.
+    This control does not take into consideration any possible hardware
+    binning.
+    The unit cell consists of the whole area of the pixel, sensitive and
+    non-sensitive.
+    This control is required for automatic calibration of sensors/cameras.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-jpeg.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-jpeg.rst
new file mode 100644
index 000000000..e07a2dbcd
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-jpeg.rst
@@ -0,0 +1,106 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _jpeg-controls:
+
+**********************
+JPEG Control Reference
+**********************
+
+The JPEG class includes controls for common features of JPEG encoders
+and decoders. Currently it includes features for codecs implementing
+progressive baseline DCT compression process with Huffman entrophy
+coding.
+
+
+.. _jpeg-control-id:
+
+JPEG Control IDs
+================
+
+``V4L2_CID_JPEG_CLASS (class)``
+    The JPEG class descriptor. Calling
+    :ref:`VIDIOC_QUERYCTRL` for this control will
+    return a description of this control class.
+
+``V4L2_CID_JPEG_CHROMA_SUBSAMPLING (menu)``
+    The chroma subsampling factors describe how each component of an
+    input image is sampled, in respect to maximum sample rate in each
+    spatial dimension. See :ref:`itu-t81`, clause A.1.1. for more
+    details. The ``V4L2_CID_JPEG_CHROMA_SUBSAMPLING`` control determines
+    how Cb and Cr components are downsampled after converting an input
+    image from RGB to Y'CbCr color space.
+
+.. tabularcolumns:: |p{7.5cm}|p{10.0cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_444``
+      - No chroma subsampling, each pixel has Y, Cr and Cb values.
+    * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_422``
+      - Horizontally subsample Cr, Cb components by a factor of 2.
+    * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_420``
+      - Subsample Cr, Cb components horizontally and vertically by 2.
+    * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_411``
+      - Horizontally subsample Cr, Cb components by a factor of 4.
+    * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_410``
+      - Subsample Cr, Cb components horizontally by 4 and vertically by 2.
+    * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY``
+      - Use only luminance component.
+
+
+
+``V4L2_CID_JPEG_RESTART_INTERVAL (integer)``
+    The restart interval determines an interval of inserting RSTm
+    markers (m = 0..7). The purpose of these markers is to additionally
+    reinitialize the encoder process, in order to process blocks of an
+    image independently. For the lossy compression processes the restart
+    interval unit is MCU (Minimum Coded Unit) and its value is contained
+    in DRI (Define Restart Interval) marker. If
+    ``V4L2_CID_JPEG_RESTART_INTERVAL`` control is set to 0, DRI and RSTm
+    markers will not be inserted.
+
+.. _jpeg-quality-control:
+
+``V4L2_CID_JPEG_COMPRESSION_QUALITY (integer)``
+    ``V4L2_CID_JPEG_COMPRESSION_QUALITY`` control determines trade-off
+    between image quality and size. It provides simpler method for
+    applications to control image quality, without a need for direct
+    reconfiguration of luminance and chrominance quantization tables. In
+    cases where a driver uses quantization tables configured directly by
+    an application, using interfaces defined elsewhere,
+    ``V4L2_CID_JPEG_COMPRESSION_QUALITY`` control should be set by
+    driver to 0.
+
+    The value range of this control is driver-specific. Only positive,
+    non-zero values are meaningful. The recommended range is 1 - 100,
+    where larger values correspond to better image quality.
+
+.. _jpeg-active-marker-control:
+
+``V4L2_CID_JPEG_ACTIVE_MARKER (bitmask)``
+    Specify which JPEG markers are included in compressed stream. This
+    control is valid only for encoders.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - ``V4L2_JPEG_ACTIVE_MARKER_APP0``
+      - Application data segment APP\ :sub:`0`.
+    * - ``V4L2_JPEG_ACTIVE_MARKER_APP1``
+      - Application data segment APP\ :sub:`1`.
+    * - ``V4L2_JPEG_ACTIVE_MARKER_COM``
+      - Comment segment.
+    * - ``V4L2_JPEG_ACTIVE_MARKER_DQT``
+      - Quantization tables segment.
+    * - ``V4L2_JPEG_ACTIVE_MARKER_DHT``
+      - Huffman tables segment.
+
+
+
+For more details about JPEG specification, refer to :ref:`itu-t81`,
+:ref:`jfif`, :ref:`w3c-jpeg-jfif`.
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-rf-tuner.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-rf-tuner.rst
new file mode 100644
index 000000000..8a6f9f037
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-rf-tuner.rst
@@ -0,0 +1,89 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _rf-tuner-controls:
+
+**************************
+RF Tuner Control Reference
+**************************
+
+The RF Tuner (RF_TUNER) class includes controls for common features of
+devices having RF tuner.
+
+In this context, RF tuner is radio receiver circuit between antenna and
+demodulator. It receives radio frequency (RF) from the antenna and
+converts that received signal to lower intermediate frequency (IF) or
+baseband frequency (BB). Tuners that could do baseband output are often
+called Zero-IF tuners. Older tuners were typically simple PLL tuners
+inside a metal box, while newer ones are highly integrated chips
+without a metal box "silicon tuners". These controls are mostly
+applicable for new feature rich silicon tuners, just because older
+tuners does not have much adjustable features.
+
+For more information about RF tuners see
+`Tuner (radio) <http://en.wikipedia.org/wiki/Tuner_%28radio%29>`__
+and `RF front end <http://en.wikipedia.org/wiki/RF_front_end>`__
+from Wikipedia.
+
+
+.. _rf-tuner-control-id:
+
+RF_TUNER Control IDs
+====================
+
+``V4L2_CID_RF_TUNER_CLASS (class)``
+    The RF_TUNER class descriptor. Calling
+    :ref:`VIDIOC_QUERYCTRL` for this control will
+    return a description of this control class.
+
+``V4L2_CID_RF_TUNER_BANDWIDTH_AUTO (boolean)``
+    Enables/disables tuner radio channel bandwidth configuration. In
+    automatic mode bandwidth configuration is performed by the driver.
+
+``V4L2_CID_RF_TUNER_BANDWIDTH (integer)``
+    Filter(s) on tuner signal path are used to filter signal according
+    to receiving party needs. Driver configures filters to fulfill
+    desired bandwidth requirement. Used when
+    V4L2_CID_RF_TUNER_BANDWIDTH_AUTO is not set. Unit is in Hz. The
+    range and step are driver-specific.
+
+``V4L2_CID_RF_TUNER_LNA_GAIN_AUTO (boolean)``
+    Enables/disables LNA automatic gain control (AGC)
+
+``V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO (boolean)``
+    Enables/disables mixer automatic gain control (AGC)
+
+``V4L2_CID_RF_TUNER_IF_GAIN_AUTO (boolean)``
+    Enables/disables IF automatic gain control (AGC)
+
+``V4L2_CID_RF_TUNER_RF_GAIN (integer)``
+    The RF amplifier is the very first amplifier on the receiver signal
+    path, just right after the antenna input. The difference between the
+    LNA gain and the RF gain in this document is that the LNA gain is
+    integrated in the tuner chip while the RF gain is a separate chip.
+    There may be both RF and LNA gain controls in the same device. The
+    range and step are driver-specific.
+
+``V4L2_CID_RF_TUNER_LNA_GAIN (integer)``
+    LNA (low noise amplifier) gain is first gain stage on the RF tuner
+    signal path. It is located very close to tuner antenna input. Used
+    when ``V4L2_CID_RF_TUNER_LNA_GAIN_AUTO`` is not set. See
+    ``V4L2_CID_RF_TUNER_RF_GAIN`` to understand how RF gain and LNA gain
+    differs from the each others. The range and step are
+    driver-specific.
+
+``V4L2_CID_RF_TUNER_MIXER_GAIN (integer)``
+    Mixer gain is second gain stage on the RF tuner signal path. It is
+    located inside mixer block, where RF signal is down-converted by the
+    mixer. Used when ``V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO`` is not set.
+    The range and step are driver-specific.
+
+``V4L2_CID_RF_TUNER_IF_GAIN (integer)``
+    IF gain is last gain stage on the RF tuner signal path. It is
+    located on output of RF tuner. It controls signal level of
+    intermediate frequency output or baseband output. Used when
+    ``V4L2_CID_RF_TUNER_IF_GAIN_AUTO`` is not set. The range and step
+    are driver-specific.
+
+``V4L2_CID_RF_TUNER_PLL_LOCK (boolean)``
+    Is synthesizer PLL locked? RF tuner is receiving given frequency
+    when that control is set. This is a read-only control.
diff --git a/Documentation/userspace-api/media/v4l/extended-controls.rst b/Documentation/userspace-api/media/v4l/extended-controls.rst
new file mode 100644
index 000000000..70301538d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/extended-controls.rst
@@ -0,0 +1,173 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _extended-controls:
+
+*********************
+Extended Controls API
+*********************
+
+
+Introduction
+============
+
+The control mechanism as originally designed was meant to be used for
+user settings (brightness, saturation, etc). However, it turned out to
+be a very useful model for implementing more complicated driver APIs
+where each driver implements only a subset of a larger API.
+
+The MPEG encoding API was the driving force behind designing and
+implementing this extended control mechanism: the MPEG standard is quite
+large and the currently supported hardware MPEG encoders each only
+implement a subset of this standard. Further more, many parameters
+relating to how the video is encoded into an MPEG stream are specific to
+the MPEG encoding chip since the MPEG standard only defines the format
+of the resulting MPEG stream, not how the video is actually encoded into
+that format.
+
+Unfortunately, the original control API lacked some features needed for
+these new uses and so it was extended into the (not terribly originally
+named) extended control API.
+
+Even though the MPEG encoding API was the first effort to use the
+Extended Control API, nowadays there are also other classes of Extended
+Controls, such as Camera Controls and FM Transmitter Controls. The
+Extended Controls API as well as all Extended Controls classes are
+described in the following text.
+
+
+The Extended Control API
+========================
+
+Three new ioctls are available:
+:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`,
+:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and
+:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`. These ioctls act
+on arrays of controls (as opposed to the
+:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and
+:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls that act on a single
+control). This is needed since it is often required to atomically change
+several controls at once.
+
+Each of the new ioctls expects a pointer to a struct
+:c:type:`v4l2_ext_controls`. This structure
+contains a pointer to the control array, a count of the number of
+controls in that array and a control class. Control classes are used to
+group similar controls into a single class. For example, control class
+``V4L2_CTRL_CLASS_USER`` contains all user controls (i. e. all controls
+that can also be set using the old :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>`
+ioctl). Control class ``V4L2_CTRL_CLASS_MPEG`` contains all controls
+relating to MPEG encoding, etc.
+
+All controls in the control array must belong to the specified control
+class. An error is returned if this is not the case.
+
+It is also possible to use an empty control array (``count`` == 0) to check
+whether the specified control class is supported.
+
+The control array is a struct
+:c:type:`v4l2_ext_control` array. The
+struct :c:type:`v4l2_ext_control` is very similar to
+struct :c:type:`v4l2_control`, except for the fact that
+it also allows for 64-bit values and pointers to be passed.
+
+Since the struct :c:type:`v4l2_ext_control` supports
+pointers it is now also possible to have controls with compound types
+such as N-dimensional arrays and/or structures. You need to specify the
+``V4L2_CTRL_FLAG_NEXT_COMPOUND`` when enumerating controls to actually
+be able to see such compound controls. In other words, these controls
+with compound types should only be used programmatically.
+
+Since such compound controls need to expose more information about
+themselves than is possible with :ref:`VIDIOC_QUERYCTRL <VIDIOC_QUERYCTRL>`
+the :ref:`VIDIOC_QUERY_EXT_CTRL <VIDIOC_QUERYCTRL>` ioctl was added. In
+particular, this ioctl gives the dimensions of the N-dimensional array if
+this control consists of more than one element.
+
+.. note::
+
+   #. It is important to realize that due to the flexibility of controls it is
+      necessary to check whether the control you want to set actually is
+      supported in the driver and what the valid range of values is. So use
+      :ref:`VIDIOC_QUERYCTRL` to check this.
+
+   #. It is possible that some of the menu indices in a control of
+      type ``V4L2_CTRL_TYPE_MENU`` may not be supported (``VIDIOC_QUERYMENU``
+      will return an error). A good example is the list of supported MPEG
+      audio bitrates. Some drivers only support one or two bitrates, others
+      support a wider range.
+
+All controls use machine endianness.
+
+
+Enumerating Extended Controls
+=============================
+
+The recommended way to enumerate over the extended controls is by using
+:ref:`VIDIOC_QUERYCTRL` in combination with the
+``V4L2_CTRL_FLAG_NEXT_CTRL`` flag:
+
+
+.. code-block:: c
+
+    struct v4l2_queryctrl qctrl;
+
+    qctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
+    while (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) {
+	/* ... */
+	qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+    }
+
+The initial control ID is set to 0 ORed with the
+``V4L2_CTRL_FLAG_NEXT_CTRL`` flag. The ``VIDIOC_QUERYCTRL`` ioctl will
+return the first control with a higher ID than the specified one. When
+no such controls are found an error is returned.
+
+If you want to get all controls within a specific control class, then
+you can set the initial ``qctrl.id`` value to the control class and add
+an extra check to break out of the loop when a control of another
+control class is found:
+
+
+.. code-block:: c
+
+    qctrl.id = V4L2_CTRL_CLASS_MPEG | V4L2_CTRL_FLAG_NEXT_CTRL;
+    while (0 == ioctl(fd, VIDIOC_QUERYCTRL, &qctrl)) {
+	if (V4L2_CTRL_ID2CLASS(qctrl.id) != V4L2_CTRL_CLASS_MPEG)
+	    break;
+	/* ... */
+	qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+    }
+
+The 32-bit ``qctrl.id`` value is subdivided into three bit ranges: the
+top 4 bits are reserved for flags (e. g. ``V4L2_CTRL_FLAG_NEXT_CTRL``)
+and are not actually part of the ID. The remaining 28 bits form the
+control ID, of which the most significant 12 bits define the control
+class and the least significant 16 bits identify the control within the
+control class. It is guaranteed that these last 16 bits are always
+non-zero for controls. The range of 0x1000 and up are reserved for
+driver-specific controls. The macro ``V4L2_CTRL_ID2CLASS(id)`` returns
+the control class ID based on a control ID.
+
+If the driver does not support extended controls, then
+``VIDIOC_QUERYCTRL`` will fail when used in combination with
+``V4L2_CTRL_FLAG_NEXT_CTRL``. In that case the old method of enumerating
+control should be used (see :ref:`enum_all_controls`). But if it is
+supported, then it is guaranteed to enumerate over all controls,
+including driver-private controls.
+
+
+Creating Control Panels
+=======================
+
+It is possible to create control panels for a graphical user interface
+where the user can select the various controls. Basically you will have
+to iterate over all controls using the method described above. Each
+control class starts with a control of type
+``V4L2_CTRL_TYPE_CTRL_CLASS``. ``VIDIOC_QUERYCTRL`` will return the name
+of this control class which can be used as the title of a tab page
+within a control panel.
+
+The flags field of struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` also
+contains hints on the behavior of the control. See the
+:ref:`VIDIOC_QUERYCTRL` documentation for more
+details.
diff --git a/Documentation/userspace-api/media/v4l/field-order.rst b/Documentation/userspace-api/media/v4l/field-order.rst
new file mode 100644
index 000000000..54548ea43
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/field-order.rst
@@ -0,0 +1,165 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _field-order:
+
+***********
+Field Order
+***********
+
+We have to distinguish between progressive and interlaced video.
+Progressive video transmits all lines of a video image sequentially.
+Interlaced video divides an image into two fields, containing only the
+odd and even lines of the image, respectively. Alternating the so called
+odd and even field are transmitted, and due to a small delay between
+fields a cathode ray TV displays the lines interleaved, yielding the
+original frame. This curious technique was invented because at refresh
+rates similar to film the image would fade out too quickly. Transmitting
+fields reduces the flicker without the necessity of doubling the frame
+rate and with it the bandwidth required for each channel.
+
+It is important to understand a video camera does not expose one frame
+at a time, merely transmitting the frames separated into fields. The
+fields are in fact captured at two different instances in time. An
+object on screen may well move between one field and the next. For
+applications analysing motion it is of paramount importance to recognize
+which field of a frame is older, the *temporal order*.
+
+When the driver provides or accepts images field by field rather than
+interleaved, it is also important applications understand how the fields
+combine to frames. We distinguish between top (aka odd) and bottom (aka
+even) fields, the *spatial order*: The first line of the top field is
+the first line of an interlaced frame, the first line of the bottom
+field is the second line of that frame.
+
+However because fields were captured one after the other, arguing
+whether a frame commences with the top or bottom field is pointless. Any
+two successive top and bottom, or bottom and top fields yield a valid
+frame. Only when the source was progressive to begin with, e. g. when
+transferring film to video, two fields may come from the same frame,
+creating a natural order.
+
+Counter to intuition the top field is not necessarily the older field.
+Whether the older field contains the top or bottom lines is a convention
+determined by the video standard. Hence the distinction between temporal
+and spatial order of fields. The diagrams below should make this
+clearer.
+
+In V4L it is assumed that all video cameras transmit fields on the media
+bus in the same order they were captured, so if the top field was
+captured first (is the older field), the top field is also transmitted
+first on the bus.
+
+All video capture and output devices must report the current field
+order. Some drivers may permit the selection of a different order, to
+this end applications initialize the ``field`` field of struct
+:c:type:`v4l2_pix_format` before calling the
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. If this is not desired it
+should have the value ``V4L2_FIELD_ANY`` (0).
+
+
+enum v4l2_field
+===============
+
+.. c:type:: v4l2_field
+
+.. tabularcolumns:: |p{5.8cm}|p{0.6cm}|p{11.1cm}|
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_FIELD_ANY``
+      - 0
+      - Applications request this field order when any field format
+	is acceptable. Drivers choose depending on hardware capabilities or
+	e.g. the requested image size, and return the actual field order.
+	Drivers must never return ``V4L2_FIELD_ANY``.
+	If multiple field orders are possible the
+	driver must choose one of the possible field orders during
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` or
+	:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>`. struct
+	:c:type:`v4l2_buffer` ``field`` can never be
+	``V4L2_FIELD_ANY``.
+    * - ``V4L2_FIELD_NONE``
+      - 1
+      - Images are in progressive (frame-based) format, not interlaced
+        (field-based).
+    * - ``V4L2_FIELD_TOP``
+      - 2
+      - Images consist of the top (aka odd) field only.
+    * - ``V4L2_FIELD_BOTTOM``
+      - 3
+      - Images consist of the bottom (aka even) field only. Applications
+	may wish to prevent a device from capturing interlaced images
+	because they will have "comb" or "feathering" artefacts around
+	moving objects.
+    * - ``V4L2_FIELD_INTERLACED``
+      - 4
+      - Images contain both fields, interleaved line by line. The temporal
+	order of the fields (whether the top or bottom field is older)
+	depends on the current video standard. In M/NTSC the bottom
+	field is the older field. In all other standards the top field
+	is the older field.
+    * - ``V4L2_FIELD_SEQ_TB``
+      - 5
+      - Images contain both fields, the top field lines are stored first
+	in memory, immediately followed by the bottom field lines. Fields
+	are always stored in temporal order, the older one first in
+	memory. Image sizes refer to the frame, not fields.
+    * - ``V4L2_FIELD_SEQ_BT``
+      - 6
+      - Images contain both fields, the bottom field lines are stored
+	first in memory, immediately followed by the top field lines.
+	Fields are always stored in temporal order, the older one first in
+	memory. Image sizes refer to the frame, not fields.
+    * - ``V4L2_FIELD_ALTERNATE``
+      - 7
+      - The two fields of a frame are passed in separate buffers, in
+	temporal order, i. e. the older one first. To indicate the field
+	parity (whether the current field is a top or bottom field) the
+	driver or application, depending on data direction, must set
+	struct :c:type:`v4l2_buffer` ``field`` to
+	``V4L2_FIELD_TOP`` or ``V4L2_FIELD_BOTTOM``. Any two successive
+	fields pair to build a frame. If fields are successive, without
+	any dropped fields between them (fields can drop individually),
+	can be determined from the struct
+	:c:type:`v4l2_buffer` ``sequence`` field. This
+	format cannot be selected when using the read/write I/O method
+	since there is no way to communicate if a field was a top or
+	bottom field.
+    * - ``V4L2_FIELD_INTERLACED_TB``
+      - 8
+      - Images contain both fields, interleaved line by line, top field
+	first. The top field is the older field.
+    * - ``V4L2_FIELD_INTERLACED_BT``
+      - 9
+      - Images contain both fields, interleaved line by line, top field
+	first. The bottom field is the older field.
+
+
+
+.. _fieldseq-tb:
+
+Field Order, Top Field First Transmitted
+========================================
+
+.. kernel-figure:: fieldseq_tb.svg
+    :alt:    fieldseq_tb.svg
+    :align:  center
+
+    Field Order, Top Field First Transmitted
+
+
+.. _fieldseq-bt:
+
+Field Order, Bottom Field First Transmitted
+===========================================
+
+.. kernel-figure:: fieldseq_bt.svg
+    :alt:    fieldseq_bt.svg
+    :align:  center
+
+    Field Order, Bottom Field First Transmitted
diff --git a/Documentation/userspace-api/media/v4l/fieldseq_bt.svg b/Documentation/userspace-api/media/v4l/fieldseq_bt.svg
new file mode 100644
index 000000000..91ac2813b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/fieldseq_bt.svg
@@ -0,0 +1,2612 @@
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diff --git a/Documentation/userspace-api/media/v4l/fieldseq_tb.svg b/Documentation/userspace-api/media/v4l/fieldseq_tb.svg
new file mode 100644
index 000000000..7b4f8fb33
--- /dev/null
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+       y="-86.604706"
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+<text
+       y="-294.93271"
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+       transform="scale(1,-1)"><tspan
+	 id="tspan5861"
+	 sodipodi:role="line"
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+<text
+       y="-324.69479"
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+</g></svg>
diff --git a/Documentation/userspace-api/media/v4l/format.rst b/Documentation/userspace-api/media/v4l/format.rst
new file mode 100644
index 000000000..35bbb2fea
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/format.rst
@@ -0,0 +1,91 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _format:
+
+************
+Data Formats
+************
+
+Data Format Negotiation
+=======================
+
+Different devices exchange different kinds of data with applications,
+for example video images, raw or sliced VBI data, RDS datagrams. Even
+within one kind many different formats are possible, in particular there is an
+abundance of image formats. Although drivers must provide a default and
+the selection persists across closing and reopening a device,
+applications should always negotiate a data format before engaging in
+data exchange. Negotiation means the application asks for a particular
+format and the driver selects and reports the best the hardware can do
+to satisfy the request. Of course applications can also just query the
+current selection.
+
+A single mechanism exists to negotiate all data formats using the
+aggregate struct :c:type:`v4l2_format` and the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctls. Additionally the
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl can be used to examine
+what the hardware *could* do, without actually selecting a new data
+format. The data formats supported by the V4L2 API are covered in the
+respective device section in :ref:`devices`. For a closer look at
+image formats see :ref:`pixfmt`.
+
+The :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl is a major turning-point in the
+initialization sequence. Prior to this point multiple panel applications
+can access the same device concurrently to select the current input,
+change controls or modify other properties. The first :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+assigns a logical stream (video data, VBI data etc.) exclusively to one
+file descriptor.
+
+Exclusive means no other application, more precisely no other file
+descriptor, can grab this stream or change device properties
+inconsistent with the negotiated parameters. A video standard change for
+example, when the new standard uses a different number of scan lines,
+can invalidate the selected image format. Therefore only the file
+descriptor owning the stream can make invalidating changes. Accordingly
+multiple file descriptors which grabbed different logical streams
+prevent each other from interfering with their settings. When for
+example video overlay is about to start or already in progress,
+simultaneous video capturing may be restricted to the same cropping and
+image size.
+
+When applications omit the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl its locking side
+effects are implied by the next step, the selection of an I/O method
+with the :ref:`VIDIOC_REQBUFS` ioctl or implicit
+with the first :c:func:`read()` or
+:c:func:`write()` call.
+
+Generally only one logical stream can be assigned to a file descriptor,
+the exception being drivers permitting simultaneous video capturing and
+overlay using the same file descriptor for compatibility with V4L and
+earlier versions of V4L2. Switching the logical stream or returning into
+"panel mode" is possible by closing and reopening the device. Drivers
+*may* support a switch using :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`.
+
+All drivers exchanging data with applications must support the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. Implementation of the
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` is highly recommended but optional.
+
+Image Format Enumeration
+========================
+
+Apart of the generic format negotiation functions a special ioctl to
+enumerate all image formats supported by video capture, overlay or
+output devices is available. [#f1]_
+
+The :ref:`VIDIOC_ENUM_FMT` ioctl must be supported
+by all drivers exchanging image data with applications.
+
+.. important::
+
+    Drivers are not supposed to convert image formats in kernel space.
+    They must enumerate only formats directly supported by the hardware.
+    If necessary driver writers should publish an example conversion
+    routine or library for integration into applications.
+
+.. [#f1]
+   Enumerating formats an application has no a-priori knowledge of
+   (otherwise it could explicitly ask for them and need not enumerate)
+   seems useless, but there are applications serving as proxy between
+   drivers and the actual video applications for which this is useful.
diff --git a/Documentation/userspace-api/media/v4l/fourcc.rst b/Documentation/userspace-api/media/v4l/fourcc.rst
new file mode 100644
index 000000000..d3482c40d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/fourcc.rst
@@ -0,0 +1,32 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Guidelines for Video4Linux pixel format 4CCs
+============================================
+
+Guidelines for Video4Linux 4CC codes defined using v4l2_fourcc() are
+specified in this document. First of the characters defines the nature of
+the pixel format, compression and colour space. The interpretation of the
+other three characters depends on the first one.
+
+Existing 4CCs may not obey these guidelines.
+
+Raw bayer
+---------
+
+The following first characters are used by raw bayer formats:
+
+- B: raw bayer, uncompressed
+- b: raw bayer, DPCM compressed
+- a: A-law compressed
+- u: u-law compressed
+
+2nd character: pixel order
+
+- B: BGGR
+- G: GBRG
+- g: GRBG
+- R: RGGB
+
+3rd character: uncompressed bits-per-pixel 0--9, A--
+
+4th character: compressed bits-per-pixel 0--9, A--
diff --git a/Documentation/userspace-api/media/v4l/func-close.rst b/Documentation/userspace-api/media/v4l/func-close.rst
new file mode 100644
index 000000000..dba3263fd
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-close.rst
@@ -0,0 +1,45 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-close:
+
+************
+V4L2 close()
+************
+
+Name
+====
+
+v4l2-close - Close a V4L2 device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: int close( int fd )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+Description
+===========
+
+Closes the device. Any I/O in progress is terminated and resources
+associated with the file descriptor are freed. However data format
+parameters, current input or output, control values or other properties
+remain unchanged.
+
+Return Value
+============
+
+The function returns 0 on success, -1 on failure and the ``errno`` is
+set appropriately. Possible error codes:
+
+EBADF
+    ``fd`` is not a valid open file descriptor.
diff --git a/Documentation/userspace-api/media/v4l/func-ioctl.rst b/Documentation/userspace-api/media/v4l/func-ioctl.rst
new file mode 100644
index 000000000..f3b005094
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-ioctl.rst
@@ -0,0 +1,58 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-ioctl:
+
+************
+V4L2 ioctl()
+************
+
+Name
+====
+
+v4l2-ioctl - Program a V4L2 device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/ioctl.h>
+
+``int ioctl(int fd, int request, void *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``request``
+    V4L2 ioctl request code as defined in the ``videodev2.h`` header
+    file, for example VIDIOC_QUERYCAP.
+
+``argp``
+    Pointer to a function parameter, usually a structure.
+
+Description
+===========
+
+The :ref:`ioctl() <func-ioctl>` function is used to program V4L2 devices. The
+argument ``fd`` must be an open file descriptor. An ioctl ``request``
+has encoded in it whether the argument is an input, output or read/write
+parameter, and the size of the argument ``argp`` in bytes. Macros and
+defines specifying V4L2 ioctl requests are located in the
+``videodev2.h`` header file. Applications should use their own copy, not
+include the version in the kernel sources on the system they compile on.
+All V4L2 ioctl requests, their respective function and parameters are
+specified in :ref:`user-func`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+When an ioctl that takes an output or read/write parameter fails, the
+parameter remains unmodified.
diff --git a/Documentation/userspace-api/media/v4l/func-mmap.rst b/Documentation/userspace-api/media/v4l/func-mmap.rst
new file mode 100644
index 000000000..e3e5e64eb
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-mmap.rst
@@ -0,0 +1,137 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-mmap:
+
+***********
+V4L2 mmap()
+***********
+
+Name
+====
+
+v4l2-mmap - Map device memory into application address space
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+    #include <sys/mman.h>
+
+.. c:function:: void *mmap( void *start, size_t length, int prot, int flags, int fd, off_t offset )
+
+Arguments
+=========
+
+``start``
+    Map the buffer to this address in the application's address space.
+    When the ``MAP_FIXED`` flag is specified, ``start`` must be a
+    multiple of the pagesize and mmap will fail when the specified
+    address cannot be used. Use of this option is discouraged;
+    applications should just specify a ``NULL`` pointer here.
+
+``length``
+    Length of the memory area to map. This must be the same value as
+    returned by the driver in the struct
+    :c:type:`v4l2_buffer` ``length`` field for the
+    single-planar API, and the same value as returned by the driver in
+    the struct :c:type:`v4l2_plane` ``length`` field for
+    the multi-planar API.
+
+``prot``
+    The ``prot`` argument describes the desired memory protection.
+    Regardless of the device type and the direction of data exchange it
+    should be set to ``PROT_READ`` | ``PROT_WRITE``, permitting read
+    and write access to image buffers. Drivers should support at least
+    this combination of flags.
+
+    .. note::
+
+      #. The Linux ``videobuf`` kernel module, which is used by some
+	 drivers supports only ``PROT_READ`` | ``PROT_WRITE``. When the
+	 driver does not support the desired protection, the
+	 :c:func:`mmap()` function fails.
+
+      #. Device memory accesses (e. g. the memory on a graphics card
+	 with video capturing hardware) may incur a performance penalty
+	 compared to main memory accesses, or reads may be significantly
+	 slower than writes or vice versa. Other I/O methods may be more
+	 efficient in such case.
+
+``flags``
+    The ``flags`` parameter specifies the type of the mapped object,
+    mapping options and whether modifications made to the mapped copy of
+    the page are private to the process or are to be shared with other
+    references.
+
+    ``MAP_FIXED`` requests that the driver selects no other address than
+    the one specified. If the specified address cannot be used,
+    :c:func:`mmap()` will fail. If ``MAP_FIXED`` is specified,
+    ``start`` must be a multiple of the pagesize. Use of this option is
+    discouraged.
+
+    One of the ``MAP_SHARED`` or ``MAP_PRIVATE`` flags must be set.
+    ``MAP_SHARED`` allows applications to share the mapped memory with
+    other (e. g. child-) processes.
+
+    .. note::
+
+       The Linux ``videobuf`` module  which is used by some
+       drivers supports only ``MAP_SHARED``. ``MAP_PRIVATE`` requests
+       copy-on-write semantics. V4L2 applications should not set the
+       ``MAP_PRIVATE``, ``MAP_DENYWRITE``, ``MAP_EXECUTABLE`` or ``MAP_ANON``
+       flags.
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``offset``
+    Offset of the buffer in device memory. This must be the same value
+    as returned by the driver in the struct
+    :c:type:`v4l2_buffer` ``m`` union ``offset`` field for
+    the single-planar API, and the same value as returned by the driver
+    in the struct :c:type:`v4l2_plane` ``m`` union
+    ``mem_offset`` field for the multi-planar API.
+
+Description
+===========
+
+The :c:func:`mmap()` function asks to map ``length`` bytes starting at
+``offset`` in the memory of the device specified by ``fd`` into the
+application address space, preferably at address ``start``. This latter
+address is a hint only, and is usually specified as 0.
+
+Suitable length and offset parameters are queried with the
+:ref:`VIDIOC_QUERYBUF` ioctl. Buffers must be
+allocated with the :ref:`VIDIOC_REQBUFS` ioctl
+before they can be queried.
+
+To unmap buffers the :c:func:`munmap()` function is used.
+
+Return Value
+============
+
+On success :c:func:`mmap()` returns a pointer to the mapped buffer. On
+error ``MAP_FAILED`` (-1) is returned, and the ``errno`` variable is set
+appropriately. Possible error codes are:
+
+EBADF
+    ``fd`` is not a valid file descriptor.
+
+EACCES
+    ``fd`` is not open for reading and writing.
+
+EINVAL
+    The ``start`` or ``length`` or ``offset`` are not suitable. (E. g.
+    they are too large, or not aligned on a ``PAGESIZE`` boundary.)
+
+    The ``flags`` or ``prot`` value is not supported.
+
+    No buffers have been allocated with the
+    :ref:`VIDIOC_REQBUFS` ioctl.
+
+ENOMEM
+    Not enough physical or virtual memory was available to complete the
+    request.
diff --git a/Documentation/userspace-api/media/v4l/func-munmap.rst b/Documentation/userspace-api/media/v4l/func-munmap.rst
new file mode 100644
index 000000000..077d58333
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-munmap.rst
@@ -0,0 +1,54 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-munmap:
+
+*************
+V4L2 munmap()
+*************
+
+Name
+====
+
+v4l2-munmap - Unmap device memory
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+    #include <sys/mman.h>
+
+.. c:function:: int munmap( void *start, size_t length )
+
+Arguments
+=========
+
+``start``
+    Address of the mapped buffer as returned by the
+    :c:func:`mmap()` function.
+
+``length``
+    Length of the mapped buffer. This must be the same value as given to
+    :c:func:`mmap()` and returned by the driver in the struct
+    :c:type:`v4l2_buffer` ``length`` field for the
+    single-planar API and in the struct
+    :c:type:`v4l2_plane` ``length`` field for the
+    multi-planar API.
+
+Description
+===========
+
+Unmaps a previously with the :c:func:`mmap()` function mapped
+buffer and frees it, if possible.
+
+Return Value
+============
+
+On success :c:func:`munmap()` returns 0, on failure -1 and the
+``errno`` variable is set appropriately:
+
+EINVAL
+    The ``start`` or ``length`` is incorrect, or no buffers have been
+    mapped yet.
diff --git a/Documentation/userspace-api/media/v4l/func-open.rst b/Documentation/userspace-api/media/v4l/func-open.rst
new file mode 100644
index 000000000..ba23ff1e4
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-open.rst
@@ -0,0 +1,79 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-open:
+
+***********
+V4L2 open()
+***********
+
+Name
+====
+
+v4l2-open - Open a V4L2 device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <fcntl.h>
+
+.. c:function:: int open( const char *device_name, int flags )
+
+Arguments
+=========
+
+``device_name``
+    Device to be opened.
+
+``flags``
+    Open flags. Access mode must be ``O_RDWR``. This is just a
+    technicality, input devices still support only reading and output
+    devices only writing.
+
+    When the ``O_NONBLOCK`` flag is given, the :c:func:`read()`
+    function and the :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl will
+    return the ``EAGAIN`` error code when no data is available or no
+    buffer is in the driver outgoing queue, otherwise these functions
+    block until data becomes available. All V4L2 drivers exchanging data
+    with applications must support the ``O_NONBLOCK`` flag.
+
+    Other flags have no effect.
+
+Description
+===========
+
+To open a V4L2 device applications call :c:func:`open()` with the
+desired device name. This function has no side effects; all data format
+parameters, current input or output, control values or other properties
+remain unchanged. At the first :c:func:`open()` call after loading the
+driver they will be reset to default values, drivers are never in an
+undefined state.
+
+Return Value
+============
+
+On success :c:func:`open()` returns the new file descriptor. On error
+-1 is returned, and the ``errno`` variable is set appropriately.
+Possible error codes are:
+
+EACCES
+    The caller has no permission to access the device.
+
+EBUSY
+    The driver does not support multiple opens and the device is already
+    in use.
+
+ENXIO
+    No device corresponding to this device special file exists.
+
+ENOMEM
+    Not enough kernel memory was available to complete the request.
+
+EMFILE
+    The process already has the maximum number of files open.
+
+ENFILE
+    The limit on the total number of files open on the system has been
+    reached.
diff --git a/Documentation/userspace-api/media/v4l/func-poll.rst b/Documentation/userspace-api/media/v4l/func-poll.rst
new file mode 100644
index 000000000..cbf4a0a10
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-poll.rst
@@ -0,0 +1,113 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-poll:
+
+***********
+V4L2 poll()
+***********
+
+Name
+====
+
+v4l2-poll - Wait for some event on a file descriptor
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/poll.h>
+
+.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
+
+Arguments
+=========
+
+
+Description
+===========
+
+With the :c:func:`poll()` function applications can suspend execution
+until the driver has captured data or is ready to accept data for
+output.
+
+When streaming I/O has been negotiated this function waits until a
+buffer has been filled by the capture device and can be dequeued with
+the :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. For output devices this
+function waits until the device is ready to accept a new buffer to be
+queued up with the :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl for
+display. When buffers are already in the outgoing queue of the driver
+(capture) or the incoming queue isn't full (display) the function
+returns immediately.
+
+On success :c:func:`poll()` returns the number of file descriptors
+that have been selected (that is, file descriptors for which the
+``revents`` field of the respective ``struct pollfd`` structure
+is non-zero). Capture devices set the ``POLLIN`` and ``POLLRDNORM``
+flags in the ``revents`` field, output devices the ``POLLOUT`` and
+``POLLWRNORM`` flags. When the function timed out it returns a value of
+zero, on failure it returns -1 and the ``errno`` variable is set
+appropriately. When the application did not call
+:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` the :c:func:`poll()`
+function succeeds, but sets the ``POLLERR`` flag in the ``revents``
+field. When the application has called
+:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` for a capture device but
+hasn't yet called :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, the
+:c:func:`poll()` function succeeds and sets the ``POLLERR`` flag in
+the ``revents`` field. For output devices this same situation will cause
+:c:func:`poll()` to succeed as well, but it sets the ``POLLOUT`` and
+``POLLWRNORM`` flags in the ``revents`` field.
+
+If an event occurred (see :ref:`VIDIOC_DQEVENT`)
+then ``POLLPRI`` will be set in the ``revents`` field and
+:c:func:`poll()` will return.
+
+When use of the :c:func:`read()` function has been negotiated and the
+driver does not capture yet, the :c:func:`poll()` function starts
+capturing. When that fails it returns a ``POLLERR`` as above. Otherwise
+it waits until data has been captured and can be read. When the driver
+captures continuously (as opposed to, for example, still images) the
+function may return immediately.
+
+When use of the :c:func:`write()` function has been negotiated and the
+driver does not stream yet, the :c:func:`poll()` function starts
+streaming. When that fails it returns a ``POLLERR`` as above. Otherwise
+it waits until the driver is ready for a non-blocking
+:c:func:`write()` call.
+
+If the caller is only interested in events (just ``POLLPRI`` is set in
+the ``events`` field), then :c:func:`poll()` will *not* start
+streaming if the driver does not stream yet. This makes it possible to
+just poll for events and not for buffers.
+
+All drivers implementing the :c:func:`read()` or :c:func:`write()`
+function or streaming I/O must also support the :c:func:`poll()`
+function.
+
+For more details see the :c:func:`poll()` manual page.
+
+Return Value
+============
+
+On success, :c:func:`poll()` returns the number structures which have
+non-zero ``revents`` fields, or zero if the call timed out. On error -1
+is returned, and the ``errno`` variable is set appropriately:
+
+EBADF
+    One or more of the ``ufds`` members specify an invalid file
+    descriptor.
+
+EBUSY
+    The driver does not support multiple read or write streams and the
+    device is already in use.
+
+EFAULT
+    ``ufds`` references an inaccessible memory area.
+
+EINTR
+    The call was interrupted by a signal.
+
+EINVAL
+    The ``nfds`` value exceeds the ``RLIMIT_NOFILE`` value. Use
+    ``getrlimit()`` to obtain this value.
diff --git a/Documentation/userspace-api/media/v4l/func-read.rst b/Documentation/userspace-api/media/v4l/func-read.rst
new file mode 100644
index 000000000..e6f6ac4be
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-read.rst
@@ -0,0 +1,130 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-read:
+
+***********
+V4L2 read()
+***********
+
+Name
+====
+
+v4l2-read - Read from a V4L2 device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: ssize_t read( int fd, void *buf, size_t count )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``buf``
+   Buffer to be filled
+
+``count``
+  Max number of bytes to read
+
+Description
+===========
+
+:c:func:`read()` attempts to read up to ``count`` bytes from file
+descriptor ``fd`` into the buffer starting at ``buf``. The layout of the
+data in the buffer is discussed in the respective device interface
+section, see ##. If ``count`` is zero, :c:func:`read()` returns zero
+and has no other results. If ``count`` is greater than ``SSIZE_MAX``,
+the result is unspecified. Regardless of the ``count`` value each
+:c:func:`read()` call will provide at most one frame (two fields)
+worth of data.
+
+By default :c:func:`read()` blocks until data becomes available. When
+the ``O_NONBLOCK`` flag was given to the :c:func:`open()`
+function it returns immediately with an ``EAGAIN`` error code when no data
+is available. The :c:func:`select()` or
+:c:func:`poll()` functions can always be used to suspend
+execution until data becomes available. All drivers supporting the
+:c:func:`read()` function must also support :c:func:`select()` and
+:c:func:`poll()`.
+
+Drivers can implement read functionality in different ways, using a
+single or multiple buffers and discarding the oldest or newest frames
+once the internal buffers are filled.
+
+:c:func:`read()` never returns a "snapshot" of a buffer being filled.
+Using a single buffer the driver will stop capturing when the
+application starts reading the buffer until the read is finished. Thus
+only the period of the vertical blanking interval is available for
+reading, or the capture rate must fall below the nominal frame rate of
+the video standard.
+
+The behavior of :c:func:`read()` when called during the active picture
+period or the vertical blanking separating the top and bottom field
+depends on the discarding policy. A driver discarding the oldest frames
+keeps capturing into an internal buffer, continuously overwriting the
+previously, not read frame, and returns the frame being received at the
+time of the :c:func:`read()` call as soon as it is complete.
+
+A driver discarding the newest frames stops capturing until the next
+:c:func:`read()` call. The frame being received at :c:func:`read()`
+time is discarded, returning the following frame instead. Again this
+implies a reduction of the capture rate to one half or less of the
+nominal frame rate. An example of this model is the video read mode of
+the bttv driver, initiating a DMA to user memory when :c:func:`read()`
+is called and returning when the DMA finished.
+
+In the multiple buffer model drivers maintain a ring of internal
+buffers, automatically advancing to the next free buffer. This allows
+continuous capturing when the application can empty the buffers fast
+enough. Again, the behavior when the driver runs out of free buffers
+depends on the discarding policy.
+
+Applications can get and set the number of buffers used internally by
+the driver with the :ref:`VIDIOC_G_PARM <VIDIOC_G_PARM>` and
+:ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` ioctls. They are optional,
+however. The discarding policy is not reported and cannot be changed.
+For minimum requirements see :ref:`devices`.
+
+Return Value
+============
+
+On success, the number of bytes read is returned. It is not an error if
+this number is smaller than the number of bytes requested, or the amount
+of data required for one frame. This may happen for example because
+:c:func:`read()` was interrupted by a signal. On error, -1 is
+returned, and the ``errno`` variable is set appropriately. In this case
+the next read will start at the beginning of a new frame. Possible error
+codes are:
+
+EAGAIN
+    Non-blocking I/O has been selected using O_NONBLOCK and no data was
+    immediately available for reading.
+
+EBADF
+    ``fd`` is not a valid file descriptor or is not open for reading, or
+    the process already has the maximum number of files open.
+
+EBUSY
+    The driver does not support multiple read streams and the device is
+    already in use.
+
+EFAULT
+    ``buf`` references an inaccessible memory area.
+
+EINTR
+    The call was interrupted by a signal before any data was read.
+
+EIO
+    I/O error. This indicates some hardware problem or a failure to
+    communicate with a remote device (USB camera etc.).
+
+EINVAL
+    The :c:func:`read()` function is not supported by this driver, not
+    on this device, or generally not on this type of device.
diff --git a/Documentation/userspace-api/media/v4l/func-select.rst b/Documentation/userspace-api/media/v4l/func-select.rst
new file mode 100644
index 000000000..ba1879c72
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-select.rst
@@ -0,0 +1,116 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-select:
+
+*************
+V4L2 select()
+*************
+
+Name
+====
+
+v4l2-select - Synchronous I/O multiplexing
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/time.h>
+    #include <sys/types.h>
+    #include <unistd.h>
+
+.. c:function:: int select( int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout )
+
+Arguments
+=========
+
+``nfds``
+  The highest-numbered file descriptor in any of the three sets, plus 1.
+
+``readfds``
+  File descriptions to be watched if a read() call won't block.
+
+``writefds``
+  File descriptions to be watched if a write() won't block.
+
+``exceptfds``
+  File descriptions to be watched for V4L2 events.
+
+``timeout``
+  Maximum time to wait.
+
+Description
+===========
+
+With the :c:func:`select()` function applications can suspend
+execution until the driver has captured data or is ready to accept data
+for output.
+
+When streaming I/O has been negotiated this function waits until a
+buffer has been filled or displayed and can be dequeued with the
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. When buffers are already in
+the outgoing queue of the driver the function returns immediately.
+
+On success :c:func:`select()` returns the total number of bits set in
+``fd_set``. When the function timed out it returns
+a value of zero. On failure it returns -1 and the ``errno`` variable is
+set appropriately. When the application did not call
+:ref:`VIDIOC_QBUF` or
+:ref:`VIDIOC_STREAMON` yet the :c:func:`select()`
+function succeeds, setting the bit of the file descriptor in ``readfds``
+or ``writefds``, but subsequent :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`
+calls will fail. [#f1]_
+
+When use of the :c:func:`read()` function has been negotiated and the
+driver does not capture yet, the :c:func:`select()` function starts
+capturing. When that fails, :c:func:`select()` returns successful and
+a subsequent :c:func:`read()` call, which also attempts to start
+capturing, will return an appropriate error code. When the driver
+captures continuously (as opposed to, for example, still images) and
+data is already available the :c:func:`select()` function returns
+immediately.
+
+When use of the :c:func:`write()` function has been negotiated the
+:c:func:`select()` function just waits until the driver is ready for a
+non-blocking :c:func:`write()` call.
+
+All drivers implementing the :c:func:`read()` or :c:func:`write()`
+function or streaming I/O must also support the :c:func:`select()`
+function.
+
+For more details see the :c:func:`select()` manual page.
+
+Return Value
+============
+
+On success, :c:func:`select()` returns the number of descriptors
+contained in the three returned descriptor sets, which will be zero if
+the timeout expired. On error -1 is returned, and the ``errno`` variable
+is set appropriately; the sets and ``timeout`` are undefined. Possible
+error codes are:
+
+EBADF
+    One or more of the file descriptor sets specified a file descriptor
+    that is not open.
+
+EBUSY
+    The driver does not support multiple read or write streams and the
+    device is already in use.
+
+EFAULT
+    The ``readfds``, ``writefds``, ``exceptfds`` or ``timeout`` pointer
+    references an inaccessible memory area.
+
+EINTR
+    The call was interrupted by a signal.
+
+EINVAL
+    The ``nfds`` argument is less than zero or greater than
+    ``FD_SETSIZE``.
+
+.. [#f1]
+   The Linux kernel implements :c:func:`select()` like the
+   :c:func:`poll()` function, but :c:func:`select()` cannot
+   return a ``POLLERR``.
diff --git a/Documentation/userspace-api/media/v4l/func-write.rst b/Documentation/userspace-api/media/v4l/func-write.rst
new file mode 100644
index 000000000..49f5a0f42
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/func-write.rst
@@ -0,0 +1,81 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _func-write:
+
+************
+V4L2 write()
+************
+
+Name
+====
+
+v4l2-write - Write to a V4L2 device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+.. c:function:: ssize_t write( int fd, void *buf, size_t count )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``buf``
+     Buffer with data to be written
+
+``count``
+    Number of bytes at the buffer
+
+Description
+===========
+
+:c:func:`write()` writes up to ``count`` bytes to the device
+referenced by the file descriptor ``fd`` from the buffer starting at
+``buf``. When the hardware outputs are not active yet, this function
+enables them. When ``count`` is zero, :c:func:`write()` returns 0
+without any other effect.
+
+When the application does not provide more data in time, the previous
+video frame, raw VBI image, sliced VPS or WSS data is displayed again.
+Sliced Teletext or Closed Caption data is not repeated, the driver
+inserts a blank line instead.
+
+Return Value
+============
+
+On success, the number of bytes written are returned. Zero indicates
+nothing was written. On error, -1 is returned, and the ``errno``
+variable is set appropriately. In this case the next write will start at
+the beginning of a new frame. Possible error codes are:
+
+EAGAIN
+    Non-blocking I/O has been selected using the
+    :ref:`O_NONBLOCK <func-open>` flag and no buffer space was
+    available to write the data immediately.
+
+EBADF
+    ``fd`` is not a valid file descriptor or is not open for writing.
+
+EBUSY
+    The driver does not support multiple write streams and the device is
+    already in use.
+
+EFAULT
+    ``buf`` references an inaccessible memory area.
+
+EINTR
+    The call was interrupted by a signal before any data was written.
+
+EIO
+    I/O error. This indicates some hardware problem.
+
+EINVAL
+    The :c:func:`write()` function is not supported by this driver,
+    not on this device, or generally not on this type of device.
diff --git a/Documentation/userspace-api/media/v4l/hist-v4l2.rst b/Documentation/userspace-api/media/v4l/hist-v4l2.rst
new file mode 100644
index 000000000..28a2750d5
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/hist-v4l2.rst
@@ -0,0 +1,1276 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _hist-v4l2:
+
+***********************
+Changes of the V4L2 API
+***********************
+
+Soon after the V4L API was added to the kernel it was criticised as too
+inflexible. In August 1998 Bill Dirks proposed a number of improvements
+and began to work on documentation, example drivers and applications.
+With the help of other volunteers this eventually became the V4L2 API,
+not just an extension but a replacement for the V4L API. However it took
+another four years and two stable kernel releases until the new API was
+finally accepted for inclusion into the kernel in its present form.
+
+Early Versions
+==============
+
+1998-08-20: First version.
+
+1998-08-27: The :c:func:`select()` function was introduced.
+
+1998-09-10: New video standard interface.
+
+1998-09-18: The ``VIDIOC_NONCAP`` ioctl was replaced by the otherwise
+meaningless ``O_TRUNC`` :c:func:`open()` flag, and the
+aliases ``O_NONCAP`` and ``O_NOIO`` were defined. Applications can set
+this flag if they intend to access controls only, as opposed to capture
+applications which need exclusive access. The ``VIDEO_STD_XXX``
+identifiers are now ordinals instead of flags, and the
+``video_std_construct()`` helper function takes id and
+transmission arguments.
+
+1998-09-28: Revamped video standard. Made video controls individually
+enumerable.
+
+1998-10-02: The ``id`` field was removed from
+struct ``video_standard`` and the color subcarrier fields were
+renamed. The :ref:`VIDIOC_QUERYSTD` ioctl was
+renamed to :ref:`VIDIOC_ENUMSTD`,
+:ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` to
+:ref:`VIDIOC_ENUMINPUT`. A first draft of the
+Codec API was released.
+
+1998-11-08: Many minor changes. Most symbols have been renamed. Some
+material changes to struct v4l2_capability.
+
+1998-11-12: The read/write directon of some ioctls was misdefined.
+
+1998-11-14: ``V4L2_PIX_FMT_RGB24`` changed to ``V4L2_PIX_FMT_BGR24``,
+and ``V4L2_PIX_FMT_RGB32`` changed to ``V4L2_PIX_FMT_BGR32``. Audio
+controls are now accessible with the
+:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and
+:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls under names starting
+with ``V4L2_CID_AUDIO``. The ``V4L2_MAJOR`` define was removed from
+``videodev.h`` since it was only used once in the ``videodev`` kernel
+module. The ``YUV422`` and ``YUV411`` planar image formats were added.
+
+1998-11-28: A few ioctl symbols changed. Interfaces for codecs and video
+output devices were added.
+
+1999-01-14: A raw VBI capture interface was added.
+
+1999-01-19: The ``VIDIOC_NEXTBUF`` ioctl was removed.
+
+V4L2 Version 0.16 1999-01-31
+============================
+
+1999-01-27: There is now one QBUF ioctl, VIDIOC_QWBUF and VIDIOC_QRBUF
+are gone. VIDIOC_QBUF takes a v4l2_buffer as a parameter. Added
+digital zoom (cropping) controls.
+
+V4L2 Version 0.18 1999-03-16
+============================
+
+Added a v4l to V4L2 ioctl compatibility layer to videodev.c. Driver
+writers, this changes how you implement your ioctl handler. See the
+Driver Writer's Guide. Added some more control id codes.
+
+V4L2 Version 0.19 1999-06-05
+============================
+
+1999-03-18: Fill in the category and catname fields of v4l2_queryctrl
+objects before passing them to the driver. Required a minor change to
+the VIDIOC_QUERYCTRL handlers in the sample drivers.
+
+1999-03-31: Better compatibility for v4l memory capture ioctls. Requires
+changes to drivers to fully support new compatibility features, see
+Driver Writer's Guide and v4l2cap.c. Added new control IDs:
+V4L2_CID_HFLIP, _VFLIP. Changed V4L2_PIX_FMT_YUV422P to _YUV422P,
+and _YUV411P to _YUV411P.
+
+1999-04-04: Added a few more control IDs.
+
+1999-04-07: Added the button control type.
+
+1999-05-02: Fixed a typo in videodev.h, and added the
+V4L2_CTRL_FLAG_GRAYED (later V4L2_CTRL_FLAG_GRABBED) flag.
+
+1999-05-20: Definition of VIDIOC_G_CTRL was wrong causing a
+malfunction of this ioctl.
+
+1999-06-05: Changed the value of V4L2_CID_WHITENESS.
+
+V4L2 Version 0.20 (1999-09-10)
+==============================
+
+Version 0.20 introduced a number of changes which were *not backward
+compatible* with 0.19 and earlier versions. Purpose of these changes was
+to simplify the API, while making it more extensible and following
+common Linux driver API conventions.
+
+1. Some typos in ``V4L2_FMT_FLAG`` symbols were fixed. struct v4l2_clip
+   was changed for compatibility with v4l. (1999-08-30)
+
+2. ``V4L2_TUNER_SUB_LANG1`` was added. (1999-09-05)
+
+3. All ioctl() commands that used an integer argument now take a pointer
+   to an integer. Where it makes sense, ioctls will return the actual
+   new value in the integer pointed to by the argument, a common
+   convention in the V4L2 API. The affected ioctls are: VIDIOC_PREVIEW,
+   VIDIOC_STREAMON, VIDIOC_STREAMOFF, VIDIOC_S_FREQ,
+   VIDIOC_S_INPUT, VIDIOC_S_OUTPUT, VIDIOC_S_EFFECT. For example
+
+   .. code-block:: c
+
+       err = ioctl (fd, VIDIOC_XXX, V4L2_XXX);
+
+   becomes
+
+   .. code-block:: c
+
+       int a = V4L2_XXX; err = ioctl(fd, VIDIOC_XXX, &a);
+
+4. All the different get- and set-format commands were swept into one
+   :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and
+   :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl taking a union and a
+   type field selecting the union member as parameter. Purpose is to
+   simplify the API by eliminating several ioctls and to allow new and
+   driver private data streams without adding new ioctls.
+
+   This change obsoletes the following ioctls: ``VIDIOC_S_INFMT``,
+   ``VIDIOC_G_INFMT``, ``VIDIOC_S_OUTFMT``, ``VIDIOC_G_OUTFMT``,
+   ``VIDIOC_S_VBIFMT`` and ``VIDIOC_G_VBIFMT``. The image format
+   struct v4l2_format was renamed to struct v4l2_pix_format, while
+   struct v4l2_format is now the envelopping structure
+   for all format negotiations.
+
+5. Similar to the changes above, the ``VIDIOC_G_PARM`` and
+   ``VIDIOC_S_PARM`` ioctls were merged with ``VIDIOC_G_OUTPARM`` and
+   ``VIDIOC_S_OUTPARM``. A ``type`` field in the new struct v4l2_streamparm
+   selects the respective union member.
+
+   This change obsoletes the ``VIDIOC_G_OUTPARM`` and
+   ``VIDIOC_S_OUTPARM`` ioctls.
+
+6. Control enumeration was simplified, and two new control flags were
+   introduced and one dropped. The ``catname`` field was replaced by a
+   ``group`` field.
+
+   Drivers can now flag unsupported and temporarily unavailable controls
+   with ``V4L2_CTRL_FLAG_DISABLED`` and ``V4L2_CTRL_FLAG_GRABBED``
+   respectively. The ``group`` name indicates a possibly narrower
+   classification than the ``category``. In other words, there may be
+   multiple groups within a category. Controls within a group would
+   typically be drawn within a group box. Controls in different
+   categories might have a greater separation, or may even appear in
+   separate windows.
+
+7. The struct v4l2_buffer ``timestamp`` was
+   changed to a 64 bit integer, containing the sampling or output time
+   of the frame in nanoseconds. Additionally timestamps will be in
+   absolute system time, not starting from zero at the beginning of a
+   stream. The data type name for timestamps is stamp_t, defined as a
+   signed 64-bit integer. Output devices should not send a buffer out
+   until the time in the timestamp field has arrived. I would like to
+   follow SGI's lead, and adopt a multimedia timestamping system like
+   their UST (Unadjusted System Time). See
+   http://web.archive.org/web/\*/http://reality.sgi.com
+   /cpirazzi_engr/lg/time/intro.html. UST uses timestamps that are
+   64-bit signed integers (not struct timeval's) and given in nanosecond
+   units. The UST clock starts at zero when the system is booted and
+   runs continuously and uniformly. It takes a little over 292 years for
+   UST to overflow. There is no way to set the UST clock. The regular
+   Linux time-of-day clock can be changed periodically, which would
+   cause errors if it were being used for timestamping a multimedia
+   stream. A real UST style clock will require some support in the
+   kernel that is not there yet. But in anticipation, I will change the
+   timestamp field to a 64-bit integer, and I will change the
+   v4l2_masterclock_gettime() function (used only by drivers) to
+   return a 64-bit integer.
+
+8. A ``sequence`` field was added to struct v4l2_buffer. The ``sequence``
+   field counts captured frames, it is ignored by output devices. When a
+   capture driver drops a frame, the sequence number of that frame is skipped.
+
+V4L2 Version 0.20 incremental changes
+=====================================
+
+1999-12-23: In struct v4l2_vbi_format the
+``reserved1`` field became ``offset``. Previously drivers were required
+to clear the ``reserved1`` field.
+
+2000-01-13: The ``V4L2_FMT_FLAG_NOT_INTERLACED`` flag was added.
+
+2000-07-31: The ``linux/poll.h`` header is now included by
+``videodev.h`` for compatibility with the original ``videodev.h`` file.
+
+2000-11-20: ``V4L2_TYPE_VBI_OUTPUT`` and ``V4L2_PIX_FMT_Y41P`` were
+added.
+
+2000-11-25: ``V4L2_TYPE_VBI_INPUT`` was added.
+
+2000-12-04: A couple typos in symbol names were fixed.
+
+2001-01-18: To avoid namespace conflicts the ``fourcc`` macro defined in
+the ``videodev.h`` header file was renamed to ``v4l2_fourcc``.
+
+2001-01-25: A possible driver-level compatibility problem between the
+``videodev.h`` file in Linux 2.4.0 and the ``videodev.h`` file included
+in the ``videodevX`` patch was fixed. Users of an earlier version of
+``videodevX`` on Linux 2.4.0 should recompile their V4L and V4L2
+drivers.
+
+2001-01-26: A possible kernel-level incompatibility between the
+``videodev.h`` file in the ``videodevX`` patch and the ``videodev.h``
+file in Linux 2.2.x with devfs patches applied was fixed.
+
+2001-03-02: Certain V4L ioctls which pass data in both direction
+although they are defined with read-only parameter, did not work
+correctly through the backward compatibility layer. [Solution?]
+
+2001-04-13: Big endian 16-bit RGB formats were added.
+
+2001-09-17: New YUV formats and the
+:ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` and
+:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctls were added.
+(The old ``VIDIOC_G_FREQ`` and ``VIDIOC_S_FREQ`` ioctls did not take
+multiple tuners into account.)
+
+2000-09-18: ``V4L2_BUF_TYPE_VBI`` was added. This may *break
+compatibility* as the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctls may fail now if the
+struct ``v4l2_fmt`` ``type`` field does not contain
+``V4L2_BUF_TYPE_VBI``. In the documentation of the struct v4l2_vbi_format`,
+the ``offset`` field the ambiguous phrase "rising edge" was changed to
+"leading edge".
+
+V4L2 Version 0.20 2000-11-23
+============================
+
+A number of changes were made to the raw VBI interface.
+
+1. Figures clarifying the line numbering scheme were added to the V4L2
+   API specification. The ``start``\ [0] and ``start``\ [1] fields no
+   longer count line numbers beginning at zero. Rationale: a) The
+   previous definition was unclear. b) The ``start``\ [] values are
+   ordinal numbers. c) There is no point in inventing a new line
+   numbering scheme. We now use line number as defined by ITU-R, period.
+   Compatibility: Add one to the start values. Applications depending on
+   the previous semantics may not function correctly.
+
+2. The restriction "count[0] > 0 and count[1] > 0" has been relaxed to
+   "(count[0] + count[1]) > 0". Rationale: Drivers may allocate
+   resources at scan line granularity and some data services are
+   transmitted only on the first field. The comment that both ``count``
+   values will usually be equal is misleading and pointless and has been
+   removed. This change *breaks compatibility* with earlier versions:
+   Drivers may return ``EINVAL``, applications may not function correctly.
+
+3. Drivers are again permitted to return negative (unknown) start values
+   as proposed earlier. Why this feature was dropped is unclear. This
+   change may *break compatibility* with applications depending on the
+   start values being positive. The use of ``EBUSY`` and ``EINVAL``
+   error codes with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl was
+   clarified. The ``EBUSY`` error code was finally documented, and the
+   ``reserved2`` field which was previously mentioned only in the
+   ``videodev.h`` header file.
+
+4. New buffer types ``V4L2_TYPE_VBI_INPUT`` and ``V4L2_TYPE_VBI_OUTPUT``
+   were added. The former is an alias for the old ``V4L2_TYPE_VBI``, the
+   latter was missing in the ``videodev.h`` file.
+
+V4L2 Version 0.20 2002-07-25
+============================
+
+Added sliced VBI interface proposal.
+
+V4L2 in Linux 2.5.46, 2002-10
+=============================
+
+Around October-November 2002, prior to an announced feature freeze of
+Linux 2.5, the API was revised, drawing from experience with V4L2 0.20.
+This unnamed version was finally merged into Linux 2.5.46.
+
+1.  As specified in :ref:`related`, drivers must make related device
+    functions available under all minor device numbers.
+
+2.  The :c:func:`open()` function requires access mode
+    ``O_RDWR`` regardless of the device type. All V4L2 drivers
+    exchanging data with applications must support the ``O_NONBLOCK``
+    flag. The ``O_NOIO`` flag, a V4L2 symbol which aliased the
+    meaningless ``O_TRUNC`` to indicate accesses without data exchange
+    (panel applications) was dropped. Drivers must stay in "panel mode"
+    until the application attempts to initiate a data exchange, see
+    :ref:`open`.
+
+3.  The struct v4l2_capability changed
+    dramatically. Note that also the size of the structure changed,
+    which is encoded in the ioctl request code, thus older V4L2 devices
+    will respond with an ``EINVAL`` error code to the new
+    :ref:`VIDIOC_QUERYCAP` ioctl.
+
+    There are new fields to identify the driver, a new RDS device
+    function ``V4L2_CAP_RDS_CAPTURE``, the ``V4L2_CAP_AUDIO`` flag
+    indicates if the device has any audio connectors, another I/O
+    capability ``V4L2_CAP_ASYNCIO`` can be flagged. In response to these
+    changes the ``type`` field became a bit set and was merged into the
+    ``flags`` field. ``V4L2_FLAG_TUNER`` was renamed to
+    ``V4L2_CAP_TUNER``, ``V4L2_CAP_VIDEO_OVERLAY`` replaced
+    ``V4L2_FLAG_PREVIEW`` and ``V4L2_CAP_VBI_CAPTURE`` and
+    ``V4L2_CAP_VBI_OUTPUT`` replaced ``V4L2_FLAG_DATA_SERVICE``.
+    ``V4L2_FLAG_READ`` and ``V4L2_FLAG_WRITE`` were merged into
+    ``V4L2_CAP_READWRITE``.
+
+    The redundant fields ``inputs``, ``outputs`` and ``audios`` were
+    removed. These properties can be determined as described in
+    :ref:`video` and :ref:`audio`.
+
+    The somewhat volatile and therefore barely useful fields
+    ``maxwidth``, ``maxheight``, ``minwidth``, ``minheight``,
+    ``maxframerate`` were removed. This information is available as
+    described in :ref:`format` and :ref:`standard`.
+
+    ``V4L2_FLAG_SELECT`` was removed. We believe the select() function
+    is important enough to require support of it in all V4L2 drivers
+    exchanging data with applications. The redundant
+    ``V4L2_FLAG_MONOCHROME`` flag was removed, this information is
+    available as described in :ref:`format`.
+
+4.  In struct v4l2_input the ``assoc_audio``
+    field and the ``capability`` field and its only flag
+    ``V4L2_INPUT_CAP_AUDIO`` was replaced by the new ``audioset`` field.
+    Instead of linking one video input to one audio input this field
+    reports all audio inputs this video input combines with.
+
+    New fields are ``tuner`` (reversing the former link from tuners to
+    video inputs), ``std`` and ``status``.
+
+    Accordingly struct v4l2_output lost its
+    ``capability`` and ``assoc_audio`` fields. ``audioset``,
+    ``modulator`` and ``std`` where added instead.
+
+5.  The struct v4l2_audio field ``audio`` was
+    renamed to ``index``, for consistency with other structures. A new
+    capability flag ``V4L2_AUDCAP_STEREO`` was added to indicated if the
+    audio input in question supports stereo sound.
+    ``V4L2_AUDCAP_EFFECTS`` and the corresponding ``V4L2_AUDMODE`` flags
+    where removed. This can be easily implemented using controls.
+    (However the same applies to AVL which is still there.)
+
+    Again for consistency the struct v4l2_audioout field ``audio`` was renamed
+    to ``index``.
+
+6.  The struct v4l2_tuner ``input`` field was
+    replaced by an ``index`` field, permitting devices with multiple
+    tuners. The link between video inputs and tuners is now reversed,
+    inputs point to their tuner. The ``std`` substructure became a
+    simple set (more about this below) and moved into struct v4l2_input.
+    A ``type`` field was added.
+
+    Accordingly in struct v4l2_modulator the
+    ``output`` was replaced by an ``index`` field.
+
+    In struct v4l2_frequency the ``port``
+    field was replaced by a ``tuner`` field containing the respective
+    tuner or modulator index number. A tuner ``type`` field was added
+    and the ``reserved`` field became larger for future extensions
+    (satellite tuners in particular).
+
+7.  The idea of completely transparent video standards was dropped.
+    Experience showed that applications must be able to work with video
+    standards beyond presenting the user a menu. Instead of enumerating
+    supported standards with an ioctl applications can now refer to
+    standards by :ref:`v4l2_std_id <v4l2-std-id>` and symbols
+    defined in the ``videodev2.h`` header file. For details see
+    :ref:`standard`. The :ref:`VIDIOC_G_STD <VIDIOC_G_STD>` and
+    :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` now take a pointer to this
+    type as argument. :ref:`VIDIOC_QUERYSTD` was
+    added to autodetect the received standard, if the hardware has this
+    capability. In struct v4l2_standard an
+    ``index`` field was added for
+    :ref:`VIDIOC_ENUMSTD`. A
+    :ref:`v4l2_std_id <v4l2-std-id>` field named ``id`` was added as
+    machine readable identifier, also replacing the ``transmission``
+    field. The misleading ``framerate`` field was renamed to
+    ``frameperiod``. The now obsolete ``colorstandard`` information,
+    originally needed to distguish between variations of standards, were
+    removed.
+
+    Struct ``v4l2_enumstd`` ceased to be.
+    :ref:`VIDIOC_ENUMSTD` now takes a pointer to a
+    struct v4l2_standard directly. The
+    information which standards are supported by a particular video
+    input or output moved into struct v4l2_input
+    and struct v4l2_output fields named ``std``,
+    respectively.
+
+8.  The struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` fields
+    ``category`` and ``group`` did not catch on and/or were not
+    implemented as expected and therefore removed.
+
+9.  The :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl was added to
+    negotiate data formats as with
+    :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`, but without the overhead of
+    programming the hardware and regardless of I/O in progress.
+
+    In struct v4l2_format the ``fmt`` union was
+    extended to contain struct v4l2_window. All
+    image format negotiations are now possible with ``VIDIOC_G_FMT``,
+    ``VIDIOC_S_FMT`` and ``VIDIOC_TRY_FMT``; ioctl. The ``VIDIOC_G_WIN``
+    and ``VIDIOC_S_WIN`` ioctls to prepare for a video overlay were
+    removed. The ``type`` field changed to type enum v4l2_buf_type and
+    the buffer type names changed as follows.
+
+
+    .. flat-table::
+	:header-rows:  1
+	:stub-columns: 0
+
+	* - Old defines
+	  - enum v4l2_buf_type
+	* - ``V4L2_BUF_TYPE_CAPTURE``
+	  - ``V4L2_BUF_TYPE_VIDEO_CAPTURE``
+	* - ``V4L2_BUF_TYPE_CODECIN``
+	  - Omitted for now
+	* - ``V4L2_BUF_TYPE_CODECOUT``
+	  - Omitted for now
+	* - ``V4L2_BUF_TYPE_EFFECTSIN``
+	  - Omitted for now
+	* - ``V4L2_BUF_TYPE_EFFECTSIN2``
+	  - Omitted for now
+	* - ``V4L2_BUF_TYPE_EFFECTSOUT``
+	  - Omitted for now
+	* - ``V4L2_BUF_TYPE_VIDEOOUT``
+	  - ``V4L2_BUF_TYPE_VIDEO_OUTPUT``
+	* - ``-``
+	  - ``V4L2_BUF_TYPE_VIDEO_OVERLAY``
+	* - ``-``
+	  - ``V4L2_BUF_TYPE_VBI_CAPTURE``
+	* - ``-``
+	  - ``V4L2_BUF_TYPE_VBI_OUTPUT``
+	* - ``-``
+	  - ``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE``
+	* - ``-``
+	  - ``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT``
+	* - ``V4L2_BUF_TYPE_PRIVATE_BASE``
+	  - ``V4L2_BUF_TYPE_PRIVATE`` (but this is deprecated)
+
+10. In struct v4l2_fmtdesc a enum v4l2_buf_type field named ``type`` was
+    added as in struct v4l2_format. The ``VIDIOC_ENUM_FBUFFMT`` ioctl is no
+    longer needed and was removed. These calls can be replaced by
+    :ref:`VIDIOC_ENUM_FMT` with type ``V4L2_BUF_TYPE_VIDEO_OVERLAY``.
+
+11. In struct v4l2_pix_format the ``depth``
+    field was removed, assuming applications which recognize the format
+    by its four-character-code already know the color depth, and others
+    do not care about it. The same rationale lead to the removal of the
+    ``V4L2_FMT_FLAG_COMPRESSED`` flag. The
+    ``V4L2_FMT_FLAG_SWCONVECOMPRESSED`` flag was removed because drivers
+    are not supposed to convert images in kernel space. A user library
+    of conversion functions should be provided instead. The
+    ``V4L2_FMT_FLAG_BYTESPERLINE`` flag was redundant. Applications can
+    set the ``bytesperline`` field to zero to get a reasonable default.
+    Since the remaining flags were replaced as well, the ``flags`` field
+    itself was removed.
+
+    The interlace flags were replaced by a enum v4l2_field value in a
+    newly added ``field`` field.
+
+    .. flat-table::
+	:header-rows:  1
+	:stub-columns: 0
+
+	* - Old flag
+	  - enum v4l2_field
+	* - ``V4L2_FMT_FLAG_NOT_INTERLACED``
+	  - ?
+	* - ``V4L2_FMT_FLAG_INTERLACED`` = ``V4L2_FMT_FLAG_COMBINED``
+	  - ``V4L2_FIELD_INTERLACED``
+	* - ``V4L2_FMT_FLAG_TOPFIELD`` = ``V4L2_FMT_FLAG_ODDFIELD``
+	  - ``V4L2_FIELD_TOP``
+	* - ``V4L2_FMT_FLAG_BOTFIELD`` = ``V4L2_FMT_FLAG_EVENFIELD``
+	  - ``V4L2_FIELD_BOTTOM``
+	* - ``-``
+	  - ``V4L2_FIELD_SEQ_TB``
+	* - ``-``
+	  - ``V4L2_FIELD_SEQ_BT``
+	* - ``-``
+	  - ``V4L2_FIELD_ALTERNATE``
+
+    The color space flags were replaced by a enum v4l2_colorspace value in
+    a newly added ``colorspace`` field, where one of
+    ``V4L2_COLORSPACE_SMPTE170M``, ``V4L2_COLORSPACE_BT878``,
+    ``V4L2_COLORSPACE_470_SYSTEM_M`` or
+    ``V4L2_COLORSPACE_470_SYSTEM_BG`` replaces ``V4L2_FMT_CS_601YUV``.
+
+12. In struct v4l2_requestbuffers the
+    ``type`` field was properly defined as enum v4l2_buf_type. Buffer types
+    changed as mentioned above. A new ``memory`` field of type
+    enum v4l2_memory was added to distinguish between
+    I/O methods using buffers allocated by the driver or the
+    application. See :ref:`io` for details.
+
+13. In struct v4l2_buffer the ``type`` field was
+    properly defined as enum v4l2_buf_type.
+    Buffer types changed as mentioned above. A ``field`` field of type
+    enum v4l2_field was added to indicate if a
+    buffer contains a top or bottom field. The old field flags were
+    removed. Since no unadjusted system time clock was added to the
+    kernel as planned, the ``timestamp`` field changed back from type
+    stamp_t, an unsigned 64 bit integer expressing the sample time in
+    nanoseconds, to struct timeval. With the addition
+    of a second memory mapping method the ``offset`` field moved into
+    union ``m``, and a new ``memory`` field of type enum v4l2_memory
+    was added to distinguish between
+    I/O methods. See :ref:`io` for details.
+
+    The ``V4L2_BUF_REQ_CONTIG`` flag was used by the V4L compatibility
+    layer, after changes to this code it was no longer needed. The
+    ``V4L2_BUF_ATTR_DEVICEMEM`` flag would indicate if the buffer was
+    indeed allocated in device memory rather than DMA-able system
+    memory. It was barely useful and so was removed.
+
+14. In struct v4l2_framebuffer the
+    ``base[3]`` array anticipating double- and triple-buffering in
+    off-screen video memory, however without defining a synchronization
+    mechanism, was replaced by a single pointer. The
+    ``V4L2_FBUF_CAP_SCALEUP`` and ``V4L2_FBUF_CAP_SCALEDOWN`` flags were
+    removed. Applications can determine this capability more accurately
+    using the new cropping and scaling interface. The
+    ``V4L2_FBUF_CAP_CLIPPING`` flag was replaced by
+    ``V4L2_FBUF_CAP_LIST_CLIPPING`` and
+    ``V4L2_FBUF_CAP_BITMAP_CLIPPING``.
+
+15. In struct v4l2_clip the ``x``, ``y``,
+    ``width`` and ``height`` field moved into a ``c`` substructure of
+    type struct v4l2_rect. The ``x`` and ``y``
+    fields were renamed to ``left`` and ``top``, i. e. offsets to a
+    context dependent origin.
+
+16. In struct v4l2_window the ``x``, ``y``,
+    ``width`` and ``height`` field moved into a ``w`` substructure as
+    above. A ``field`` field of type enum v4l2_field was added to
+    distinguish between field and frame (interlaced) overlay.
+
+17. The digital zoom interface, including struct ``v4l2_zoomcap``,
+    struct ``v4l2_zoom``, ``V4L2_ZOOM_NONCAP`` and
+    ``V4L2_ZOOM_WHILESTREAMING`` was replaced by a new cropping and
+    scaling interface. The previously unused
+    struct v4l2_cropcap and struct v4l2_crop
+    where redefined for this purpose. See :ref:`crop` for details.
+
+18. In struct v4l2_vbi_format the
+    ``SAMPLE_FORMAT`` field now contains a four-character-code as used
+    to identify video image formats and ``V4L2_PIX_FMT_GREY`` replaces
+    the ``V4L2_VBI_SF_UBYTE`` define. The ``reserved`` field was
+    extended.
+
+19. In struct v4l2_captureparm the type of
+    the ``timeperframe`` field changed from unsigned long to
+    struct v4l2_fract. This allows the accurate
+    expression of multiples of the NTSC-M frame rate 30000 / 1001. A new
+    field ``readbuffers`` was added to control the driver behaviour in
+    read I/O mode.
+
+    Similar changes were made to struct v4l2_outputparm.
+
+20. The struct ``v4l2_performance`` and
+    ``VIDIOC_G_PERF`` ioctl were dropped. Except when using the
+    :ref:`read/write I/O method <rw>`, which is limited anyway, this
+    information is already available to applications.
+
+21. The example transformation from RGB to YCbCr color space in the old
+    V4L2 documentation was inaccurate, this has been corrected in
+    :ref:`pixfmt`.
+
+V4L2 2003-06-19
+===============
+
+1. A new capability flag ``V4L2_CAP_RADIO`` was added for radio devices.
+   Prior to this change radio devices would identify solely by having
+   exactly one tuner whose type field reads ``V4L2_TUNER_RADIO``.
+
+2. An optional driver access priority mechanism was added, see
+   :ref:`app-pri` for details.
+
+3. The audio input and output interface was found to be incomplete.
+
+   Previously the :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` ioctl would
+   enumerate the available audio inputs. An ioctl to determine the
+   current audio input, if more than one combines with the current video
+   input, did not exist. So ``VIDIOC_G_AUDIO`` was renamed to
+   ``VIDIOC_G_AUDIO_OLD``, this ioctl was removed on Kernel 2.6.39. The
+   :ref:`VIDIOC_ENUMAUDIO` ioctl was added to
+   enumerate audio inputs, while
+   :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` now reports the current
+   audio input.
+
+   The same changes were made to
+   :ref:`VIDIOC_G_AUDOUT <VIDIOC_G_AUDOUT>` and
+   :ref:`VIDIOC_ENUMAUDOUT <VIDIOC_ENUMAUDOUT>`.
+
+   Until further the "videodev" module will automatically translate
+   between the old and new ioctls, but drivers and applications must be
+   updated to successfully compile again.
+
+4. The :ref:`VIDIOC_OVERLAY` ioctl was incorrectly
+   defined with write-read parameter. It was changed to write-only,
+   while the write-read version was renamed to ``VIDIOC_OVERLAY_OLD``.
+   The old ioctl was removed on Kernel 2.6.39. Until further the
+   "videodev" kernel module will automatically translate to the new
+   version, so drivers must be recompiled, but not applications.
+
+5. :ref:`overlay` incorrectly stated that clipping rectangles define
+   regions where the video can be seen. Correct is that clipping
+   rectangles define regions where *no* video shall be displayed and so
+   the graphics surface can be seen.
+
+6. The :ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` and
+   :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls were defined with
+   write-only parameter, inconsistent with other ioctls modifying their
+   argument. They were changed to write-read, while a ``_OLD`` suffix
+   was added to the write-only versions. The old ioctls were removed on
+   Kernel 2.6.39. Drivers and applications assuming a constant parameter
+   need an update.
+
+V4L2 2003-11-05
+===============
+
+1. In :ref:`pixfmt-rgb` the following pixel formats were incorrectly
+   transferred from Bill Dirks' V4L2 specification. Descriptions below
+   refer to bytes in memory, in ascending address order.
+
+
+   .. flat-table::
+       :header-rows:  1
+       :stub-columns: 0
+
+       * - Symbol
+	 - In this document prior to revision 0.5
+	 - Corrected
+       * - ``V4L2_PIX_FMT_RGB24``
+	 - B, G, R
+	 - R, G, B
+       * - ``V4L2_PIX_FMT_BGR24``
+	 - R, G, B
+	 - B, G, R
+       * - ``V4L2_PIX_FMT_RGB32``
+	 - B, G, R, X
+	 - R, G, B, X
+       * - ``V4L2_PIX_FMT_BGR32``
+	 - R, G, B, X
+	 - B, G, R, X
+
+   The ``V4L2_PIX_FMT_BGR24`` example was always correct.
+
+   In :ref:`v4l-image-properties` the mapping of the V4L
+   ``VIDEO_PALETTE_RGB24`` and ``VIDEO_PALETTE_RGB32`` formats to V4L2
+   pixel formats was accordingly corrected.
+
+2. Unrelated to the fixes above, drivers may still interpret some V4L2
+   RGB pixel formats differently. These issues have yet to be addressed,
+   for details see :ref:`pixfmt-rgb`.
+
+V4L2 in Linux 2.6.6, 2004-05-09
+===============================
+
+1. The :ref:`VIDIOC_CROPCAP` ioctl was incorrectly
+   defined with read-only parameter. It is now defined as write-read
+   ioctl, while the read-only version was renamed to
+   ``VIDIOC_CROPCAP_OLD``. The old ioctl was removed on Kernel 2.6.39.
+
+V4L2 in Linux 2.6.8
+===================
+
+1. A new field ``input`` (former ``reserved[0]``) was added to the
+   struct v4l2_buffer. Purpose of this
+   field is to alternate between video inputs (e. g. cameras) in step
+   with the video capturing process. This function must be enabled with
+   the new ``V4L2_BUF_FLAG_INPUT`` flag. The ``flags`` field is no
+   longer read-only.
+
+V4L2 spec erratum 2004-08-01
+============================
+
+1. The return value of the :ref:`func-open` function was incorrectly
+   documented.
+
+2. Audio output ioctls end in -AUDOUT, not -AUDIOOUT.
+
+3. In the Current Audio Input example the ``VIDIOC_G_AUDIO`` ioctl took
+   the wrong argument.
+
+4. The documentation of the :ref:`VIDIOC_QBUF` and
+   :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctls did not mention the
+   struct v4l2_buffer ``memory`` field. It was
+   also missing from examples. Also on the ``VIDIOC_DQBUF`` page the ``EIO``
+   error code was not documented.
+
+V4L2 in Linux 2.6.14
+====================
+
+1. A new sliced VBI interface was added. It is documented in
+   :ref:`sliced` and replaces the interface first proposed in V4L2
+   specification 0.8.
+
+V4L2 in Linux 2.6.15
+====================
+
+1. The :ref:`VIDIOC_LOG_STATUS` ioctl was added.
+
+2. New video standards ``V4L2_STD_NTSC_443``, ``V4L2_STD_SECAM_LC``,
+   ``V4L2_STD_SECAM_DK`` (a set of SECAM D, K and K1), and
+   ``V4L2_STD_ATSC`` (a set of ``V4L2_STD_ATSC_8_VSB`` and
+   ``V4L2_STD_ATSC_16_VSB``) were defined. Note the ``V4L2_STD_525_60``
+   set now includes ``V4L2_STD_NTSC_443``. See also
+   :ref:`v4l2-std-id`.
+
+3. The ``VIDIOC_G_COMP`` and ``VIDIOC_S_COMP`` ioctl were renamed to
+   ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` respectively. Their
+   argument was replaced by a struct
+   ``v4l2_mpeg_compression`` pointer. (The
+   ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` ioctls where removed
+   in Linux 2.6.25.)
+
+V4L2 spec erratum 2005-11-27
+============================
+
+The capture example in :ref:`capture-example` called the
+:ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` ioctl without checking if
+cropping is supported. In the video standard selection example in
+:ref:`standard` the :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` call used
+the wrong argument type.
+
+V4L2 spec erratum 2006-01-10
+============================
+
+1. The ``V4L2_IN_ST_COLOR_KILL`` flag in struct v4l2_input not only
+   indicates if the color killer is enabled, but also if it is active.
+   (The color killer disables color decoding when it detects no color
+   in the video signal to improve the image quality.)
+
+2. :ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` is a write-read ioctl, not
+   write-only as stated on its reference page. The ioctl changed in 2003
+   as noted above.
+
+V4L2 spec erratum 2006-02-03
+============================
+
+1. In struct v4l2_captureparm and struct v4l2_outputparm the ``timeperframe``
+   field gives the time in seconds, not microseconds.
+
+V4L2 spec erratum 2006-02-04
+============================
+
+1. The ``clips`` field in struct v4l2_window
+   must point to an array of struct v4l2_clip, not
+   a linked list, because drivers ignore the
+   struct v4l2_clip. ``next`` pointer.
+
+V4L2 in Linux 2.6.17
+====================
+
+1. New video standard macros were added: ``V4L2_STD_NTSC_M_KR`` (NTSC M
+   South Korea), and the sets ``V4L2_STD_MN``, ``V4L2_STD_B``,
+   ``V4L2_STD_GH`` and ``V4L2_STD_DK``. The ``V4L2_STD_NTSC`` and
+   ``V4L2_STD_SECAM`` sets now include ``V4L2_STD_NTSC_M_KR`` and
+   ``V4L2_STD_SECAM_LC`` respectively.
+
+2. A new ``V4L2_TUNER_MODE_LANG1_LANG2`` was defined to record both
+   languages of a bilingual program. The use of
+   ``V4L2_TUNER_MODE_STEREO`` for this purpose is deprecated now. See
+   the :ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` section for details.
+
+V4L2 spec erratum 2006-09-23 (Draft 0.15)
+=========================================
+
+1. In various places ``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` and
+   ``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT`` of the sliced VBI interface were
+   not mentioned along with other buffer types.
+
+2. In :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` it was clarified that the
+   struct v4l2_audio ``mode`` field is a flags field.
+
+3. :ref:`VIDIOC_QUERYCAP` did not mention the sliced VBI and radio
+   capability flags.
+
+4. In :ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` it was clarified that
+   applications must initialize the tuner ``type`` field of
+   struct v4l2_frequency before calling
+   :ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>`.
+
+5. The ``reserved`` array in struct v4l2_requestbuffers has 2 elements,
+   not 32.
+
+6. In :ref:`output` and :ref:`raw-vbi` the device file names
+   ``/dev/vout`` which never caught on were replaced by ``/dev/video``.
+
+7. With Linux 2.6.15 the possible range for VBI device minor numbers was
+   extended from 224-239 to 224-255. Accordingly device file names
+   ``/dev/vbi0`` to ``/dev/vbi31`` are possible now.
+
+V4L2 in Linux 2.6.18
+====================
+
+1. New ioctls :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`,
+   :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and
+   :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` were added, a
+   flag to skip unsupported controls with
+   :ref:`VIDIOC_QUERYCTRL`, new control types
+   ``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_TYPE_CTRL_CLASS``
+   (enum v4l2_ctrl_type), and new control flags
+   ``V4L2_CTRL_FLAG_READ_ONLY``, ``V4L2_CTRL_FLAG_UPDATE``,
+   ``V4L2_CTRL_FLAG_INACTIVE`` and ``V4L2_CTRL_FLAG_SLIDER``
+   (:ref:`control-flags`). See :ref:`extended-controls` for details.
+
+V4L2 in Linux 2.6.19
+====================
+
+1. In struct v4l2_sliced_vbi_cap a
+   buffer type field was added replacing a reserved field. Note on
+   architectures where the size of enum types differs from int types the
+   size of the structure changed. The
+   :ref:`VIDIOC_G_SLICED_VBI_CAP <VIDIOC_G_SLICED_VBI_CAP>` ioctl
+   was redefined from being read-only to write-read. Applications must
+   initialize the type field and clear the reserved fields now. These
+   changes may *break the compatibility* with older drivers and
+   applications.
+
+2. The ioctls :ref:`VIDIOC_ENUM_FRAMESIZES`
+   and
+   :ref:`VIDIOC_ENUM_FRAMEINTERVALS`
+   were added.
+
+3. A new pixel format ``V4L2_PIX_FMT_RGB444`` (:ref:`pixfmt-rgb`) was
+   added.
+
+V4L2 spec erratum 2006-10-12 (Draft 0.17)
+=========================================
+
+1. ``V4L2_PIX_FMT_HM12`` (:ref:`reserved-formats`) is a YUV 4:2:0, not
+   4:2:2 format.
+
+V4L2 in Linux 2.6.21
+====================
+
+1. The ``videodev2.h`` header file is now dual licensed under GNU
+   General Public License version two or later, and under a 3-clause
+   BSD-style license.
+
+V4L2 in Linux 2.6.22
+====================
+
+1. Two new field orders ``V4L2_FIELD_INTERLACED_TB`` and
+   ``V4L2_FIELD_INTERLACED_BT`` were added. See enum v4l2_field for
+   details.
+
+2. Three new clipping/blending methods with a global or straight or
+   inverted local alpha value were added to the video overlay interface.
+   See the description of the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`
+   and :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctls for details.
+
+   A new ``global_alpha`` field was added to struct v4l2_window,
+   extending the structure. This may **break compatibility** with
+   applications using a struct v4l2_window directly. However the
+   :ref:`VIDIOC_G/S/TRY_FMT <VIDIOC_G_FMT>` ioctls, which take a
+   pointer to a struct v4l2_format parent structure
+   with padding bytes at the end, are not affected.
+
+3. The format of the ``chromakey`` field in struct v4l2_window changed from
+   "host order RGB32" to a pixel value in the same format as the framebuffer.
+   This may **break compatibility** with existing applications. Drivers
+   supporting the "host order RGB32" format are not known.
+
+V4L2 in Linux 2.6.24
+====================
+
+1. The pixel formats ``V4L2_PIX_FMT_PAL8``, ``V4L2_PIX_FMT_YUV444``,
+   ``V4L2_PIX_FMT_YUV555``, ``V4L2_PIX_FMT_YUV565`` and
+   ``V4L2_PIX_FMT_YUV32`` were added.
+
+V4L2 in Linux 2.6.25
+====================
+
+1. The pixel formats :ref:`V4L2_PIX_FMT_Y16 <V4L2-PIX-FMT-Y16>` and
+   :ref:`V4L2_PIX_FMT_SBGGR16 <V4L2-PIX-FMT-SBGGR16>` were added.
+
+2. New :ref:`controls <control>` ``V4L2_CID_POWER_LINE_FREQUENCY``,
+   ``V4L2_CID_HUE_AUTO``, ``V4L2_CID_WHITE_BALANCE_TEMPERATURE``,
+   ``V4L2_CID_SHARPNESS`` and ``V4L2_CID_BACKLIGHT_COMPENSATION`` were
+   added. The controls ``V4L2_CID_BLACK_LEVEL``, ``V4L2_CID_WHITENESS``,
+   ``V4L2_CID_HCENTER`` and ``V4L2_CID_VCENTER`` were deprecated.
+
+3. A :ref:`Camera controls class <camera-controls>` was added, with
+   the new controls ``V4L2_CID_EXPOSURE_AUTO``,
+   ``V4L2_CID_EXPOSURE_ABSOLUTE``, ``V4L2_CID_EXPOSURE_AUTO_PRIORITY``,
+   ``V4L2_CID_PAN_RELATIVE``, ``V4L2_CID_TILT_RELATIVE``,
+   ``V4L2_CID_PAN_RESET``, ``V4L2_CID_TILT_RESET``,
+   ``V4L2_CID_PAN_ABSOLUTE``, ``V4L2_CID_TILT_ABSOLUTE``,
+   ``V4L2_CID_FOCUS_ABSOLUTE``, ``V4L2_CID_FOCUS_RELATIVE`` and
+   ``V4L2_CID_FOCUS_AUTO``.
+
+4. The ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` ioctls, which
+   were superseded by the :ref:`extended controls <extended-controls>`
+   interface in Linux 2.6.18, where finally removed from the
+   ``videodev2.h`` header file.
+
+V4L2 in Linux 2.6.26
+====================
+
+1. The pixel formats ``V4L2_PIX_FMT_Y16`` and ``V4L2_PIX_FMT_SBGGR16``
+   were added.
+
+2. Added user controls ``V4L2_CID_CHROMA_AGC`` and
+   ``V4L2_CID_COLOR_KILLER``.
+
+V4L2 in Linux 2.6.27
+====================
+
+1. The :ref:`VIDIOC_S_HW_FREQ_SEEK` ioctl
+   and the ``V4L2_CAP_HW_FREQ_SEEK`` capability were added.
+
+2. The pixel formats ``V4L2_PIX_FMT_YVYU``, ``V4L2_PIX_FMT_PCA501``,
+   ``V4L2_PIX_FMT_PCA505``, ``V4L2_PIX_FMT_PCA508``,
+   ``V4L2_PIX_FMT_PCA561``, ``V4L2_PIX_FMT_SGBRG8``,
+   ``V4L2_PIX_FMT_PAC207`` and ``V4L2_PIX_FMT_PJPG`` were added.
+
+V4L2 in Linux 2.6.28
+====================
+
+1. Added ``V4L2_MPEG_AUDIO_ENCODING_AAC`` and
+   ``V4L2_MPEG_AUDIO_ENCODING_AC3`` MPEG audio encodings.
+
+2. Added ``V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC`` MPEG video encoding.
+
+3. The pixel formats ``V4L2_PIX_FMT_SGRBG10`` and
+   ``V4L2_PIX_FMT_SGRBG10DPCM8`` were added.
+
+V4L2 in Linux 2.6.29
+====================
+
+1. The ``VIDIOC_G_CHIP_IDENT`` ioctl was renamed to
+   ``VIDIOC_G_CHIP_IDENT_OLD`` and ``VIDIOC_DBG_G_CHIP_IDENT`` was
+   introduced in its place. The old struct ``v4l2_chip_ident`` was renamed to
+   struct ``v4l2_chip_ident_old``.
+
+2. The pixel formats ``V4L2_PIX_FMT_VYUY``, ``V4L2_PIX_FMT_NV16`` and
+   ``V4L2_PIX_FMT_NV61`` were added.
+
+3. Added camera controls ``V4L2_CID_ZOOM_ABSOLUTE``,
+   ``V4L2_CID_ZOOM_RELATIVE``, ``V4L2_CID_ZOOM_CONTINUOUS`` and
+   ``V4L2_CID_PRIVACY``.
+
+V4L2 in Linux 2.6.30
+====================
+
+1. New control flag ``V4L2_CTRL_FLAG_WRITE_ONLY`` was added.
+
+2. New control ``V4L2_CID_COLORFX`` was added.
+
+V4L2 in Linux 2.6.32
+====================
+
+1. In order to be easier to compare a V4L2 API and a kernel version, now
+   V4L2 API is numbered using the Linux Kernel version numeration.
+
+2. Finalized the RDS capture API. See :ref:`rds` for more information.
+
+3. Added new capabilities for modulators and RDS encoders.
+
+4. Add description for libv4l API.
+
+5. Added support for string controls via new type
+   ``V4L2_CTRL_TYPE_STRING``.
+
+6. Added ``V4L2_CID_BAND_STOP_FILTER`` documentation.
+
+7. Added FM Modulator (FM TX) Extended Control Class:
+   ``V4L2_CTRL_CLASS_FM_TX`` and their Control IDs.
+
+8. Added FM Receiver (FM RX) Extended Control Class:
+   ``V4L2_CTRL_CLASS_FM_RX`` and their Control IDs.
+
+9. Added Remote Controller chapter, describing the default Remote
+   Controller mapping for media devices.
+
+V4L2 in Linux 2.6.33
+====================
+
+1. Added support for Digital Video timings in order to support HDTV
+   receivers and transmitters.
+
+V4L2 in Linux 2.6.34
+====================
+
+1. Added ``V4L2_CID_IRIS_ABSOLUTE`` and ``V4L2_CID_IRIS_RELATIVE``
+   controls to the :ref:`Camera controls class <camera-controls>`.
+
+V4L2 in Linux 2.6.37
+====================
+
+1. Remove the vtx (videotext/teletext) API. This API was no longer used
+   and no hardware exists to verify the API. Nor were any userspace
+   applications found that used it. It was originally scheduled for
+   removal in 2.6.35.
+
+V4L2 in Linux 2.6.39
+====================
+
+1. The old VIDIOC_*_OLD symbols and V4L1 support were removed.
+
+2. Multi-planar API added. Does not affect the compatibility of current
+   drivers and applications. See :ref:`multi-planar API <planar-apis>`
+   for details.
+
+V4L2 in Linux 3.1
+=================
+
+1. VIDIOC_QUERYCAP now returns a per-subsystem version instead of a
+   per-driver one.
+
+   Standardize an error code for invalid ioctl.
+
+   Added V4L2_CTRL_TYPE_BITMASK.
+
+V4L2 in Linux 3.2
+=================
+
+1. V4L2_CTRL_FLAG_VOLATILE was added to signal volatile controls to
+   userspace.
+
+2. Add selection API for extended control over cropping and composing.
+   Does not affect the compatibility of current drivers and
+   applications. See :ref:`selection API <selection-api>` for details.
+
+V4L2 in Linux 3.3
+=================
+
+1. Added ``V4L2_CID_ALPHA_COMPONENT`` control to the
+   :ref:`User controls class <control>`.
+
+2. Added the device_caps field to struct v4l2_capabilities and added
+   the new V4L2_CAP_DEVICE_CAPS capability.
+
+V4L2 in Linux 3.4
+=================
+
+1. Added :ref:`JPEG compression control class <jpeg-controls>`.
+
+2. Extended the DV Timings API:
+   :ref:`VIDIOC_ENUM_DV_TIMINGS`,
+   :ref:`VIDIOC_QUERY_DV_TIMINGS` and
+   :ref:`VIDIOC_DV_TIMINGS_CAP`.
+
+V4L2 in Linux 3.5
+=================
+
+1. Added integer menus, the new type will be
+   V4L2_CTRL_TYPE_INTEGER_MENU.
+
+2. Added selection API for V4L2 subdev interface:
+   :ref:`VIDIOC_SUBDEV_G_SELECTION` and
+   :ref:`VIDIOC_SUBDEV_S_SELECTION <VIDIOC_SUBDEV_G_SELECTION>`.
+
+3. Added ``V4L2_COLORFX_ANTIQUE``, ``V4L2_COLORFX_ART_FREEZE``,
+   ``V4L2_COLORFX_AQUA``, ``V4L2_COLORFX_SILHOUETTE``,
+   ``V4L2_COLORFX_SOLARIZATION``, ``V4L2_COLORFX_VIVID`` and
+   ``V4L2_COLORFX_ARBITRARY_CBCR`` menu items to the
+   ``V4L2_CID_COLORFX`` control.
+
+4. Added ``V4L2_CID_COLORFX_CBCR`` control.
+
+5. Added camera controls ``V4L2_CID_AUTO_EXPOSURE_BIAS``,
+   ``V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE``,
+   ``V4L2_CID_IMAGE_STABILIZATION``, ``V4L2_CID_ISO_SENSITIVITY``,
+   ``V4L2_CID_ISO_SENSITIVITY_AUTO``, ``V4L2_CID_EXPOSURE_METERING``,
+   ``V4L2_CID_SCENE_MODE``, ``V4L2_CID_3A_LOCK``,
+   ``V4L2_CID_AUTO_FOCUS_START``, ``V4L2_CID_AUTO_FOCUS_STOP``,
+   ``V4L2_CID_AUTO_FOCUS_STATUS`` and ``V4L2_CID_AUTO_FOCUS_RANGE``.
+
+V4L2 in Linux 3.6
+=================
+
+1. Replaced ``input`` in struct v4l2_buffer by
+   ``reserved2`` and removed ``V4L2_BUF_FLAG_INPUT``.
+
+2. Added V4L2_CAP_VIDEO_M2M and V4L2_CAP_VIDEO_M2M_MPLANE
+   capabilities.
+
+3. Added support for frequency band enumerations:
+   :ref:`VIDIOC_ENUM_FREQ_BANDS`.
+
+V4L2 in Linux 3.9
+=================
+
+1. Added timestamp types to ``flags`` field in
+   struct v4l2_buffer. See :ref:`buffer-flags`.
+
+2. Added ``V4L2_EVENT_CTRL_CH_RANGE`` control event changes flag. See
+   :ref:`ctrl-changes-flags`.
+
+V4L2 in Linux 3.10
+==================
+
+1. Removed obsolete and unused DV_PRESET ioctls VIDIOC_G_DV_PRESET,
+   VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and
+   VIDIOC_ENUM_DV_PRESET. Remove the related v4l2_input/output
+   capability flags V4L2_IN_CAP_PRESETS and V4L2_OUT_CAP_PRESETS.
+
+2. Added new debugging ioctl
+   :ref:`VIDIOC_DBG_G_CHIP_INFO`.
+
+V4L2 in Linux 3.11
+==================
+
+1. Remove obsolete ``VIDIOC_DBG_G_CHIP_IDENT`` ioctl.
+
+V4L2 in Linux 3.14
+==================
+
+1. In struct v4l2_rect, the type of ``width`` and
+   ``height`` fields changed from _s32 to _u32.
+
+V4L2 in Linux 3.15
+==================
+
+1. Added Software Defined Radio (SDR) Interface.
+
+V4L2 in Linux 3.16
+==================
+
+1. Added event V4L2_EVENT_SOURCE_CHANGE.
+
+V4L2 in Linux 3.17
+==================
+
+1. Extended struct v4l2_pix_format. Added
+   format flags.
+
+2. Added compound control types and
+   :ref:`VIDIOC_QUERY_EXT_CTRL <VIDIOC_QUERYCTRL>`.
+
+V4L2 in Linux 3.18
+==================
+
+1. Added ``V4L2_CID_PAN_SPEED`` and ``V4L2_CID_TILT_SPEED`` camera
+   controls.
+
+V4L2 in Linux 3.19
+==================
+
+1. Rewrote Colorspace chapter, added new enum v4l2_ycbcr_encoding
+   and enum v4l2_quantization fields to struct v4l2_pix_format,
+   struct v4l2_pix_format_mplane and struct v4l2_mbus_framefmt.
+
+V4L2 in Linux 4.4
+=================
+
+1. Renamed ``V4L2_TUNER_ADC`` to ``V4L2_TUNER_SDR``. The use of
+   ``V4L2_TUNER_ADC`` is deprecated now.
+
+2. Added ``V4L2_CID_RF_TUNER_RF_GAIN`` RF Tuner control.
+
+3. Added transmitter support for Software Defined Radio (SDR) Interface.
+
+.. _other:
+
+Relation of V4L2 to other Linux multimedia APIs
+===============================================
+
+.. _xvideo:
+
+X Video Extension
+-----------------
+
+The X Video Extension (abbreviated XVideo or just Xv) is an extension of
+the X Window system, implemented for example by the XFree86 project. Its
+scope is similar to V4L2, an API to video capture and output devices for
+X clients. Xv allows applications to display live video in a window,
+send window contents to a TV output, and capture or output still images
+in XPixmaps [#f1]_. With their implementation XFree86 makes the extension
+available across many operating systems and architectures.
+
+Because the driver is embedded into the X server Xv has a number of
+advantages over the V4L2 :ref:`video overlay interface <overlay>`. The
+driver can easily determine the overlay target, i. e. visible graphics
+memory or off-screen buffers for a destructive overlay. It can program
+the RAMDAC for a non-destructive overlay, scaling or color-keying, or
+the clipping functions of the video capture hardware, always in sync
+with drawing operations or windows moving or changing their stacking
+order.
+
+To combine the advantages of Xv and V4L a special Xv driver exists in
+XFree86 and XOrg, just programming any overlay capable Video4Linux
+device it finds. To enable it ``/etc/X11/XF86Config`` must contain these
+lines:
+
+::
+
+    Section "Module"
+	Load "v4l"
+    EndSection
+
+As of XFree86 4.2 this driver still supports only V4L ioctls, however it
+should work just fine with all V4L2 devices through the V4L2
+backward-compatibility layer. Since V4L2 permits multiple opens it is
+possible (if supported by the V4L2 driver) to capture video while an X
+client requested video overlay. Restrictions of simultaneous capturing
+and overlay are discussed in :ref:`overlay` apply.
+
+Only marginally related to V4L2, XFree86 extended Xv to support hardware
+YUV to RGB conversion and scaling for faster video playback, and added
+an interface to MPEG-2 decoding hardware. This API is useful to display
+images captured with V4L2 devices.
+
+Digital Video
+-------------
+
+V4L2 does not support digital terrestrial, cable or satellite broadcast.
+A separate project aiming at digital receivers exists. You can find its
+homepage at `https://linuxtv.org <https://linuxtv.org>`__. The Linux
+DVB API has no connection to the V4L2 API except that drivers for hybrid
+hardware may support both.
+
+Audio Interfaces
+----------------
+
+[to do - OSS/ALSA]
+
+.. _experimental:
+
+Experimental API Elements
+=========================
+
+The following V4L2 API elements are currently experimental and may
+change in the future.
+
+-  :ref:`VIDIOC_DBG_G_REGISTER` and
+   :ref:`VIDIOC_DBG_S_REGISTER <VIDIOC_DBG_G_REGISTER>` ioctls.
+
+-  :ref:`VIDIOC_DBG_G_CHIP_INFO` ioctl.
+
+.. _obsolete:
+
+Obsolete API Elements
+=====================
+
+The following V4L2 API elements were superseded by new interfaces and
+should not be implemented in new drivers.
+
+-  ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` ioctls. Use Extended
+   Controls, :ref:`extended-controls`.
+
+-  VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET,
+   VIDIOC_ENUM_DV_PRESETS and VIDIOC_QUERY_DV_PRESET ioctls. Use
+   the DV Timings API (:ref:`dv-timings`).
+
+-  ``VIDIOC_SUBDEV_G_CROP`` and ``VIDIOC_SUBDEV_S_CROP`` ioctls. Use
+   ``VIDIOC_SUBDEV_G_SELECTION`` and ``VIDIOC_SUBDEV_S_SELECTION``,
+   :ref:`VIDIOC_SUBDEV_G_SELECTION`.
+
+.. [#f1]
+   This is not implemented in XFree86.
diff --git a/Documentation/userspace-api/media/v4l/hsv-formats.rst b/Documentation/userspace-api/media/v4l/hsv-formats.rst
new file mode 100644
index 000000000..d810c914b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/hsv-formats.rst
@@ -0,0 +1,19 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _hsv-formats:
+
+***********
+HSV Formats
+***********
+
+These formats store the color information of the image
+in a geometrical representation. The colors are mapped into a
+cylinder, where the angle is the HUE, the height is the VALUE
+and the distance to the center is the SATURATION. This is a very
+useful format for image segmentation algorithms.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-packed-hsv
diff --git a/Documentation/userspace-api/media/v4l/io.rst b/Documentation/userspace-api/media/v4l/io.rst
new file mode 100644
index 000000000..ce0cece6f
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/io.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _io:
+
+############
+Input/Output
+############
+The V4L2 API defines several different methods to read from or write to
+a device. All drivers exchanging data with applications must support at
+least one of them.
+
+The classic I/O method using the :c:func:`read()` and
+:c:func:`write()` function is automatically selected after opening a
+V4L2 device. When the driver does not support this method attempts to
+read or write will fail at any time.
+
+Other methods must be negotiated. To select the streaming I/O method
+with memory mapped or user buffers applications call the
+:ref:`VIDIOC_REQBUFS` ioctl. The asynchronous I/O
+method is not defined yet.
+
+Video overlay can be considered another I/O method, although the
+application does not directly receive the image data. It is selected by
+initiating video overlay with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+ioctl. For more information see :ref:`overlay`.
+
+Generally exactly one I/O method, including overlay, is associated with
+each file descriptor. The only exceptions are applications not
+exchanging data with a driver ("panel applications", see :ref:`open`)
+and drivers permitting simultaneous video capturing and overlay using
+the same file descriptor, for compatibility with V4L and earlier
+versions of V4L2.
+
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_REQBUFS` would permit this to some
+degree, but for simplicity drivers need not support switching the I/O
+method (after first switching away from read/write) other than by
+closing and reopening the device.
+
+The following sections describe the various I/O methods in more detail.
+
+.. toctree::
+    :maxdepth: 1
+
+    rw
+    mmap
+    userp
+    dmabuf
+    async
+    buffer
+    field-order
diff --git a/Documentation/userspace-api/media/v4l/libv4l-introduction.rst b/Documentation/userspace-api/media/v4l/libv4l-introduction.rst
new file mode 100644
index 000000000..05690f235
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/libv4l-introduction.rst
@@ -0,0 +1,180 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _libv4l-introduction:
+
+************
+Introduction
+************
+
+libv4l is a collection of libraries which adds a thin abstraction layer
+on top of video4linux2 devices. The purpose of this (thin) layer is to
+make it easy for application writers to support a wide variety of
+devices without having to write separate code for different devices in
+the same class.
+
+An example of using libv4l is provided by
+:ref:`v4l2grab <v4l2grab-example>`.
+
+libv4l consists of 3 different libraries:
+
+libv4lconvert
+=============
+
+libv4lconvert is a library that converts several different pixelformats
+found in V4L2 drivers into a few common RGB and YUY formats.
+
+It currently accepts the following V4L2 driver formats:
+:ref:`V4L2_PIX_FMT_BGR24 <V4L2-PIX-FMT-BGR24>`,
+:ref:`V4L2_PIX_FMT_HM12 <V4L2-PIX-FMT-HM12>`,
+:ref:`V4L2_PIX_FMT_JPEG <V4L2-PIX-FMT-JPEG>`,
+:ref:`V4L2_PIX_FMT_MJPEG <V4L2-PIX-FMT-MJPEG>`,
+:ref:`V4L2_PIX_FMT_MR97310A <V4L2-PIX-FMT-MR97310A>`,
+:ref:`V4L2_PIX_FMT_OV511 <V4L2-PIX-FMT-OV511>`,
+:ref:`V4L2_PIX_FMT_OV518 <V4L2-PIX-FMT-OV518>`,
+:ref:`V4L2_PIX_FMT_PAC207 <V4L2-PIX-FMT-PAC207>`,
+:ref:`V4L2_PIX_FMT_PJPG <V4L2-PIX-FMT-PJPG>`,
+:ref:`V4L2_PIX_FMT_RGB24 <V4L2-PIX-FMT-RGB24>`,
+:ref:`V4L2_PIX_FMT_SBGGR8 <V4L2-PIX-FMT-SBGGR8>`,
+:ref:`V4L2_PIX_FMT_SGBRG8 <V4L2-PIX-FMT-SGBRG8>`,
+:ref:`V4L2_PIX_FMT_SGRBG8 <V4L2-PIX-FMT-SGRBG8>`,
+:ref:`V4L2_PIX_FMT_SN9C10X <V4L2-PIX-FMT-SN9C10X>`,
+:ref:`V4L2_PIX_FMT_SN9C20X_I420 <V4L2-PIX-FMT-SN9C20X-I420>`,
+:ref:`V4L2_PIX_FMT_SPCA501 <V4L2-PIX-FMT-SPCA501>`,
+:ref:`V4L2_PIX_FMT_SPCA505 <V4L2-PIX-FMT-SPCA505>`,
+:ref:`V4L2_PIX_FMT_SPCA508 <V4L2-PIX-FMT-SPCA508>`,
+:ref:`V4L2_PIX_FMT_SPCA561 <V4L2-PIX-FMT-SPCA561>`,
+:ref:`V4L2_PIX_FMT_SQ905C <V4L2-PIX-FMT-SQ905C>`,
+:ref:`V4L2_PIX_FMT_SRGGB8 <V4L2-PIX-FMT-SRGGB8>`,
+:ref:`V4L2_PIX_FMT_UYVY <V4L2-PIX-FMT-UYVY>`,
+:ref:`V4L2_PIX_FMT_YUV420 <V4L2-PIX-FMT-YUV420>`,
+:ref:`V4L2_PIX_FMT_YUYV <V4L2-PIX-FMT-YUYV>`,
+:ref:`V4L2_PIX_FMT_YVU420 <V4L2-PIX-FMT-YVU420>`, and
+:ref:`V4L2_PIX_FMT_YVYU <V4L2-PIX-FMT-YVYU>`.
+
+Later on libv4lconvert was expanded to also be able to do various video
+processing functions to improve webcam video quality. The video
+processing is split in to 2 parts: libv4lconvert/control and
+libv4lconvert/processing.
+
+The control part is used to offer video controls which can be used to
+control the video processing functions made available by
+libv4lconvert/processing. These controls are stored application wide
+(until reboot) by using a persistent shared memory object.
+
+libv4lconvert/processing offers the actual video processing
+functionality.
+
+libv4l1
+=======
+
+This library offers functions that can be used to quickly make v4l1
+applications work with v4l2 devices. These functions work exactly like
+the normal open/close/etc, except that libv4l1 does full emulation of
+the v4l1 api on top of v4l2 drivers, in case of v4l1 drivers it will
+just pass calls through.
+
+Since those functions are emulations of the old V4L1 API, it shouldn't
+be used for new applications.
+
+libv4l2
+=======
+
+This library should be used for all modern V4L2 applications.
+
+It provides handles to call V4L2 open/ioctl/close/poll methods. Instead
+of just providing the raw output of the device, it enhances the calls in
+the sense that it will use libv4lconvert to provide more video formats
+and to enhance the image quality.
+
+In most cases, libv4l2 just passes the calls directly through to the
+v4l2 driver, intercepting the calls to
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>`,
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`,
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`,
+:ref:`VIDIOC_ENUM_FRAMESIZES <VIDIOC_ENUM_FRAMESIZES>` and
+:ref:`VIDIOC_ENUM_FRAMEINTERVALS <VIDIOC_ENUM_FRAMEINTERVALS>` in
+order to emulate the formats
+:ref:`V4L2_PIX_FMT_BGR24 <V4L2-PIX-FMT-BGR24>`,
+:ref:`V4L2_PIX_FMT_RGB24 <V4L2-PIX-FMT-RGB24>`,
+:ref:`V4L2_PIX_FMT_YUV420 <V4L2-PIX-FMT-YUV420>`, and
+:ref:`V4L2_PIX_FMT_YVU420 <V4L2-PIX-FMT-YVU420>`, if they aren't
+available in the driver. :ref:`VIDIOC_ENUM_FMT <VIDIOC_ENUM_FMT>`
+keeps enumerating the hardware supported formats, plus the emulated
+formats offered by libv4l at the end.
+
+.. _libv4l-ops:
+
+Libv4l device control functions
+-------------------------------
+
+The common file operation methods are provided by libv4l.
+
+Those functions operate just like the gcc function ``dup()`` and
+V4L2 functions
+:c:func:`open()`, :c:func:`close()`,
+:c:func:`ioctl()`, :c:func:`read()`,
+:c:func:`mmap()` and :c:func:`munmap()`:
+
+.. c:function:: int v4l2_open(const char *file, int oflag, ...)
+
+   operates like the :c:func:`open()` function.
+
+.. c:function:: int v4l2_close(int fd)
+
+   operates like the :c:func:`close()` function.
+
+.. c:function:: int v4l2_dup(int fd)
+
+   operates like the libc ``dup()`` function, duplicating a file handler.
+
+.. c:function:: int v4l2_ioctl (int fd, unsigned long int request, ...)
+
+   operates like the :c:func:`ioctl()` function.
+
+.. c:function:: int v4l2_read (int fd, void* buffer, size_t n)
+
+   operates like the :c:func:`read()` function.
+
+.. c:function:: void v4l2_mmap(void *start, size_t length, int prot, int flags, int fd, int64_t offset);
+
+   operates like the :c:func:`munmap()` function.
+
+.. c:function:: int v4l2_munmap(void *_start, size_t length);
+
+   operates like the :c:func:`munmap()` function.
+
+Those functions provide additional control:
+
+.. c:function:: int v4l2_fd_open(int fd, int v4l2_flags)
+
+   opens an already opened fd for further use through v4l2lib and possibly
+   modify libv4l2's default behavior through the ``v4l2_flags`` argument.
+   Currently, ``v4l2_flags`` can be ``V4L2_DISABLE_CONVERSION``, to disable
+   format conversion.
+
+.. c:function:: int v4l2_set_control(int fd, int cid, int value)
+
+   This function takes a value of 0 - 65535, and then scales that range to the
+   actual range of the given v4l control id, and then if the cid exists and is
+   not locked sets the cid to the scaled value.
+
+.. c:function:: int v4l2_get_control(int fd, int cid)
+
+   This function returns a value of 0 - 65535, scaled to from the actual range
+   of the given v4l control id. when the cid does not exist, could not be
+   accessed for some reason, or some error occurred 0 is returned.
+
+v4l1compat.so wrapper library
+=============================
+
+This library intercepts calls to
+:c:func:`open()`, :c:func:`close()`,
+:c:func:`ioctl()`, :c:func:`mmap()` and
+:c:func:`munmap()`
+operations and redirects them to the libv4l counterparts, by using
+``LD_PRELOAD=/usr/lib/v4l1compat.so``. It also emulates V4L1 calls via V4L2
+API.
+
+It allows usage of binary legacy applications that still don't use
+libv4l.
diff --git a/Documentation/userspace-api/media/v4l/libv4l.rst b/Documentation/userspace-api/media/v4l/libv4l.rst
new file mode 100644
index 000000000..f446dd2d0
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/libv4l.rst
@@ -0,0 +1,13 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _libv4l:
+
+************************
+Libv4l Userspace Library
+************************
+
+
+.. toctree::
+    :maxdepth: 1
+
+    libv4l-introduction
diff --git a/Documentation/userspace-api/media/v4l/meta-formats.rst b/Documentation/userspace-api/media/v4l/meta-formats.rst
new file mode 100644
index 000000000..fff25357f
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/meta-formats.rst
@@ -0,0 +1,21 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _meta-formats:
+
+****************
+Metadata Formats
+****************
+
+These formats are used for the :ref:`metadata` interface only.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-meta-d4xx
+    pixfmt-meta-intel-ipu3
+    pixfmt-meta-rkisp1
+    pixfmt-meta-uvc
+    pixfmt-meta-vsp1-hgo
+    pixfmt-meta-vsp1-hgt
+    pixfmt-meta-vivid
diff --git a/Documentation/userspace-api/media/v4l/mmap.rst b/Documentation/userspace-api/media/v4l/mmap.rst
new file mode 100644
index 000000000..16b1e13b0
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/mmap.rst
@@ -0,0 +1,285 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _mmap:
+
+******************************
+Streaming I/O (Memory Mapping)
+******************************
+
+Input and output devices support this I/O method when the
+``V4L2_CAP_STREAMING`` flag in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl is set. There are two
+streaming methods, to determine if the memory mapping flavor is
+supported applications must call the :ref:`VIDIOC_REQBUFS` ioctl
+with the memory type set to ``V4L2_MEMORY_MMAP``.
+
+Streaming is an I/O method where only pointers to buffers are exchanged
+between application and driver, the data itself is not copied. Memory
+mapping is primarily intended to map buffers in device memory into the
+application's address space. Device memory can be for example the video
+memory on a graphics card with a video capture add-on. However, being
+the most efficient I/O method available for a long time, many other
+drivers support streaming as well, allocating buffers in DMA-able main
+memory.
+
+A driver can support many sets of buffers. Each set is identified by a
+unique buffer type value. The sets are independent and each set can hold
+a different type of data. To access different sets at the same time
+different file descriptors must be used. [#f1]_
+
+To allocate device buffers applications call the
+:ref:`VIDIOC_REQBUFS` ioctl with the desired number
+of buffers and buffer type, for example ``V4L2_BUF_TYPE_VIDEO_CAPTURE``.
+This ioctl can also be used to change the number of buffers or to free
+the allocated memory, provided none of the buffers are still mapped.
+
+Before applications can access the buffers they must map them into their
+address space with the :c:func:`mmap()` function. The
+location of the buffers in device memory can be determined with the
+:ref:`VIDIOC_QUERYBUF` ioctl. In the single-planar
+API case, the ``m.offset`` and ``length`` returned in a struct
+:c:type:`v4l2_buffer` are passed as sixth and second
+parameter to the :c:func:`mmap()` function. When using the
+multi-planar API, struct :c:type:`v4l2_buffer` contains an
+array of struct :c:type:`v4l2_plane` structures, each
+containing its own ``m.offset`` and ``length``. When using the
+multi-planar API, every plane of every buffer has to be mapped
+separately, so the number of calls to :c:func:`mmap()` should
+be equal to number of buffers times number of planes in each buffer. The
+offset and length values must not be modified. Remember, the buffers are
+allocated in physical memory, as opposed to virtual memory, which can be
+swapped out to disk. Applications should free the buffers as soon as
+possible with the :c:func:`munmap()` function.
+
+Example: Mapping buffers in the single-planar API
+=================================================
+
+.. code-block:: c
+
+    struct v4l2_requestbuffers reqbuf;
+    struct {
+	void *start;
+	size_t length;
+    } *buffers;
+    unsigned int i;
+
+    memset(&reqbuf, 0, sizeof(reqbuf));
+    reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    reqbuf.memory = V4L2_MEMORY_MMAP;
+    reqbuf.count = 20;
+
+    if (-1 == ioctl (fd, VIDIOC_REQBUFS, &reqbuf)) {
+	if (errno == EINVAL)
+	    printf("Video capturing or mmap-streaming is not supported\\n");
+	else
+	    perror("VIDIOC_REQBUFS");
+
+	exit(EXIT_FAILURE);
+    }
+
+    /* We want at least five buffers. */
+
+    if (reqbuf.count < 5) {
+	/* You may need to free the buffers here. */
+	printf("Not enough buffer memory\\n");
+	exit(EXIT_FAILURE);
+    }
+
+    buffers = calloc(reqbuf.count, sizeof(*buffers));
+    assert(buffers != NULL);
+
+    for (i = 0; i < reqbuf.count; i++) {
+	struct v4l2_buffer buffer;
+
+	memset(&buffer, 0, sizeof(buffer));
+	buffer.type = reqbuf.type;
+	buffer.memory = V4L2_MEMORY_MMAP;
+	buffer.index = i;
+
+	if (-1 == ioctl (fd, VIDIOC_QUERYBUF, &buffer)) {
+	    perror("VIDIOC_QUERYBUF");
+	    exit(EXIT_FAILURE);
+	}
+
+	buffers[i].length = buffer.length; /* remember for munmap() */
+
+	buffers[i].start = mmap(NULL, buffer.length,
+		    PROT_READ | PROT_WRITE, /* recommended */
+		    MAP_SHARED,             /* recommended */
+		    fd, buffer.m.offset);
+
+	if (MAP_FAILED == buffers[i].start) {
+	    /* If you do not exit here you should unmap() and free()
+	       the buffers mapped so far. */
+	    perror("mmap");
+	    exit(EXIT_FAILURE);
+	}
+    }
+
+    /* Cleanup. */
+
+    for (i = 0; i < reqbuf.count; i++)
+	munmap(buffers[i].start, buffers[i].length);
+
+Example: Mapping buffers in the multi-planar API
+================================================
+
+.. code-block:: c
+
+    struct v4l2_requestbuffers reqbuf;
+    /* Our current format uses 3 planes per buffer */
+    #define FMT_NUM_PLANES = 3
+
+    struct {
+	void *start[FMT_NUM_PLANES];
+	size_t length[FMT_NUM_PLANES];
+    } *buffers;
+    unsigned int i, j;
+
+    memset(&reqbuf, 0, sizeof(reqbuf));
+    reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+    reqbuf.memory = V4L2_MEMORY_MMAP;
+    reqbuf.count = 20;
+
+    if (ioctl(fd, VIDIOC_REQBUFS, &reqbuf) < 0) {
+	if (errno == EINVAL)
+	    printf("Video capturing or mmap-streaming is not supported\\n");
+	else
+	    perror("VIDIOC_REQBUFS");
+
+	exit(EXIT_FAILURE);
+    }
+
+    /* We want at least five buffers. */
+
+    if (reqbuf.count < 5) {
+	/* You may need to free the buffers here. */
+	printf("Not enough buffer memory\\n");
+	exit(EXIT_FAILURE);
+    }
+
+    buffers = calloc(reqbuf.count, sizeof(*buffers));
+    assert(buffers != NULL);
+
+    for (i = 0; i < reqbuf.count; i++) {
+	struct v4l2_buffer buffer;
+	struct v4l2_plane planes[FMT_NUM_PLANES];
+
+	memset(&buffer, 0, sizeof(buffer));
+	buffer.type = reqbuf.type;
+	buffer.memory = V4L2_MEMORY_MMAP;
+	buffer.index = i;
+	/* length in struct v4l2_buffer in multi-planar API stores the size
+	 * of planes array. */
+	buffer.length = FMT_NUM_PLANES;
+	buffer.m.planes = planes;
+
+	if (ioctl(fd, VIDIOC_QUERYBUF, &buffer) < 0) {
+	    perror("VIDIOC_QUERYBUF");
+	    exit(EXIT_FAILURE);
+	}
+
+	/* Every plane has to be mapped separately */
+	for (j = 0; j < FMT_NUM_PLANES; j++) {
+	    buffers[i].length[j] = buffer.m.planes[j].length; /* remember for munmap() */
+
+	    buffers[i].start[j] = mmap(NULL, buffer.m.planes[j].length,
+		     PROT_READ | PROT_WRITE, /* recommended */
+		     MAP_SHARED,             /* recommended */
+		     fd, buffer.m.planes[j].m.offset);
+
+	    if (MAP_FAILED == buffers[i].start[j]) {
+		/* If you do not exit here you should unmap() and free()
+		   the buffers and planes mapped so far. */
+		perror("mmap");
+		exit(EXIT_FAILURE);
+	    }
+	}
+    }
+
+    /* Cleanup. */
+
+    for (i = 0; i < reqbuf.count; i++)
+	for (j = 0; j < FMT_NUM_PLANES; j++)
+	    munmap(buffers[i].start[j], buffers[i].length[j]);
+
+Conceptually streaming drivers maintain two buffer queues, an incoming
+and an outgoing queue. They separate the synchronous capture or output
+operation locked to a video clock from the application which is subject
+to random disk or network delays and preemption by other processes,
+thereby reducing the probability of data loss. The queues are organized
+as FIFOs, buffers will be output in the order enqueued in the incoming
+FIFO, and were captured in the order dequeued from the outgoing FIFO.
+
+The driver may require a minimum number of buffers enqueued at all times
+to function, apart of this no limit exists on the number of buffers
+applications can enqueue in advance, or dequeue and process. They can
+also enqueue in a different order than buffers have been dequeued, and
+the driver can *fill* enqueued *empty* buffers in any order.  [#f2]_ The
+index number of a buffer (struct :c:type:`v4l2_buffer`
+``index``) plays no role here, it only identifies the buffer.
+
+Initially all mapped buffers are in dequeued state, inaccessible by the
+driver. For capturing applications it is customary to first enqueue all
+mapped buffers, then to start capturing and enter the read loop. Here
+the application waits until a filled buffer can be dequeued, and
+re-enqueues the buffer when the data is no longer needed. Output
+applications fill and enqueue buffers, when enough buffers are stacked
+up the output is started with :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`.
+In the write loop, when the application runs out of free buffers, it
+must wait until an empty buffer can be dequeued and reused.
+
+To enqueue and dequeue a buffer applications use the
+:ref:`VIVIOC_QBUF <VIDIOC_QBUF>` and :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`
+ioctl. The status of a buffer being mapped, enqueued, full or empty can
+be determined at any time using the :ref:`VIDIOC_QUERYBUF` ioctl. Two
+methods exist to suspend execution of the application until one or more
+buffers can be dequeued.  By default :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`
+blocks when no buffer is in the outgoing queue. When the ``O_NONBLOCK``
+flag was given to the :c:func:`open()` function,
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` returns immediately with an ``EAGAIN``
+error code when no buffer is available. The :c:func:`select()`
+or :c:func:`poll()` functions are always available.
+
+To start and stop capturing or output applications call the
+:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` and :ref:`VIDIOC_STREAMOFF
+<VIDIOC_STREAMON>` ioctl.
+
+.. note:::ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`
+   removes all buffers from both queues as a side effect. Since there is
+   no notion of doing anything "now" on a multitasking system, if an
+   application needs to synchronize with another event it should examine
+   the struct ::c:type:`v4l2_buffer` ``timestamp`` of captured
+   or outputted buffers.
+
+Drivers implementing memory mapping I/O must support the
+:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, :ref:`VIDIOC_QUERYBUF
+<VIDIOC_QUERYBUF>`, :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_DQBUF
+<VIDIOC_QBUF>`, :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`
+and :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls, the :ref:`mmap()
+<func-mmap>`, :c:func:`munmap()`, :ref:`select()
+<func-select>` and :c:func:`poll()` function. [#f3]_
+
+[capture example]
+
+.. [#f1]
+   One could use one file descriptor and set the buffer type field
+   accordingly when calling :ref:`VIDIOC_QBUF` etc.,
+   but it makes the :c:func:`select()` function ambiguous. We also
+   like the clean approach of one file descriptor per logical stream.
+   Video overlay for example is also a logical stream, although the CPU
+   is not needed for continuous operation.
+
+.. [#f2]
+   Random enqueue order permits applications processing images out of
+   order (such as video codecs) to return buffers earlier, reducing the
+   probability of data loss. Random fill order allows drivers to reuse
+   buffers on a LIFO-basis, taking advantage of caches holding
+   scatter-gather lists and the like.
+
+.. [#f3]
+   At the driver level :c:func:`select()` and :c:func:`poll()` are
+   the same, and :c:func:`select()` is too important to be optional.
+   The rest should be evident.
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new file mode 100644
index 000000000..30a15b547
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diff --git a/Documentation/userspace-api/media/v4l/open.rst b/Documentation/userspace-api/media/v4l/open.rst
new file mode 100644
index 000000000..18bfb9b81
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/open.rst
@@ -0,0 +1,238 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _open:
+
+***************************
+Opening and Closing Devices
+***************************
+
+.. _v4l2_hardware_control:
+
+Controlling a hardware peripheral via V4L2
+==========================================
+
+Hardware that is supported using the V4L2 uAPI often consists of multiple
+devices or peripherals, each of which have their own driver.
+
+The bridge driver exposes one or more V4L2 device nodes
+(see :ref:`v4l2_device_naming`).
+
+There are other drivers providing support for other components of
+the hardware, which may also expose device nodes, called V4L2 sub-devices.
+
+When such V4L2 sub-devices are exposed, they allow controlling those
+other hardware components - usually connected via a serial bus (like
+I²C, SMBus or SPI). Depending on the bridge driver, those sub-devices
+can be controlled indirectly via the bridge driver or explicitly via
+the :ref:`Media Controller <media_controller>` and via the
+:ref:`V4L2 sub-devices <subdev>`.
+
+The devices that require the use of the
+:ref:`Media Controller <media_controller>` are called **MC-centric**
+devices. The devices that are fully controlled via V4L2 device nodes
+are called **video-node-centric**.
+
+Userspace can check if a V4L2 hardware peripheral is MC-centric by
+calling :ref:`VIDIOC_QUERYCAP` and checking the
+:ref:`device_caps field <device-capabilities>`.
+
+If the device returns ``V4L2_CAP_IO_MC`` flag at ``device_caps``,
+then it is MC-centric, otherwise, it is video-node-centric.
+
+It is required for MC-centric drivers to identify the V4L2
+sub-devices and to configure the pipelines via the
+:ref:`media controller API <media_controller>` before using the peripheral.
+Also, the sub-devices' configuration shall be controlled via the
+:ref:`sub-device API <subdev>`.
+
+.. note::
+
+   A video-node-centric may still provide media-controller and
+   sub-device interfaces as well.
+
+  However, in that case the media-controller and the sub-device
+  interfaces are read-only and just provide information about the
+  device. The actual configuration is done via the video nodes.
+
+.. _v4l2_device_naming:
+
+V4L2 Device Node Naming
+=======================
+
+V4L2 drivers are implemented as kernel modules, loaded manually by the
+system administrator or automatically when a device is first discovered.
+The driver modules plug into the ``videodev`` kernel module. It provides
+helper functions and a common application interface specified in this
+document.
+
+Each driver thus loaded registers one or more device nodes with major
+number 81. Minor numbers are allocated dynamically unless the kernel
+is compiled with the kernel option CONFIG_VIDEO_FIXED_MINOR_RANGES.
+In that case minor numbers are allocated in ranges depending on the
+device node type.
+
+The device nodes supported by the Video4Linux subsystem are:
+
+======================== ====================================================
+Default device node name Usage
+======================== ====================================================
+``/dev/videoX``		 Video and metadata for capture/output devices
+``/dev/vbiX``		 Vertical blank data (i.e. closed captions, teletext)
+``/dev/radioX``		 Radio tuners and modulators
+``/dev/swradioX``	 Software Defined Radio tuners and modulators
+``/dev/v4l-touchX``	 Touch sensors
+``/dev/v4l-subdevX``	 Video sub-devices (used by sensors and other
+			 components of the hardware peripheral)\ [#]_
+======================== ====================================================
+
+Where ``X`` is a non-negative integer.
+
+.. note::
+
+   1. The actual device node name is system-dependent, as udev rules may apply.
+   2. There is no guarantee that ``X`` will remain the same for the same
+      device, as the number depends on the device driver's probe order.
+      If you need an unique name, udev default rules produce
+      ``/dev/v4l/by-id/`` and ``/dev/v4l/by-path/`` directories containing
+      links that can be used uniquely to identify a V4L2 device node::
+
+	$ tree /dev/v4l
+	/dev/v4l
+	├── by-id
+	│   └── usb-OmniVision._USB_Camera-B4.04.27.1-video-index0 -> ../../video0
+	└── by-path
+	    └── pci-0000:00:14.0-usb-0:2:1.0-video-index0 -> ../../video0
+
+.. [#] **V4L2 sub-device nodes** (e. g. ``/dev/v4l-subdevX``) use a different
+       set of system calls, as covered at :ref:`subdev`.
+
+Many drivers support "video_nr", "radio_nr" or "vbi_nr" module
+options to select specific video/radio/vbi node numbers. This allows the
+user to request that the device node is named e.g. /dev/video5 instead
+of leaving it to chance. When the driver supports multiple devices of
+the same type more than one device node number can be assigned,
+separated by commas:
+
+.. code-block:: none
+
+   # modprobe mydriver video_nr=0,1 radio_nr=0,1
+
+In ``/etc/modules.conf`` this may be written as:
+
+::
+
+    options mydriver video_nr=0,1 radio_nr=0,1
+
+When no device node number is given as module option the driver supplies
+a default.
+
+Normally udev will create the device nodes in /dev automatically for
+you. If udev is not installed, then you need to enable the
+CONFIG_VIDEO_FIXED_MINOR_RANGES kernel option in order to be able to
+correctly relate a minor number to a device node number. I.e., you need
+to be certain that minor number 5 maps to device node name video5. With
+this kernel option different device types have different minor number
+ranges. These ranges are listed in :ref:`devices`.
+
+The creation of character special files (with mknod) is a privileged
+operation and devices cannot be opened by major and minor number. That
+means applications cannot *reliably* scan for loaded or installed
+drivers. The user must enter a device name, or the application can try
+the conventional device names.
+
+.. _related:
+
+Related Devices
+===============
+
+Devices can support several functions. For example video capturing, VBI
+capturing and radio support.
+
+The V4L2 API creates different V4L2 device nodes for each of these functions.
+
+The V4L2 API was designed with the idea that one device node could
+support all functions. However, in practice this never worked: this
+'feature' was never used by applications and many drivers did not
+support it and if they did it was certainly never tested. In addition,
+switching a device node between different functions only works when
+using the streaming I/O API, not with the
+:c:func:`read()`/\ :c:func:`write()` API.
+
+Today each V4L2 device node supports just one function.
+
+Besides video input or output the hardware may also support audio
+sampling or playback. If so, these functions are implemented as ALSA PCM
+devices with optional ALSA audio mixer devices.
+
+One problem with all these devices is that the V4L2 API makes no
+provisions to find these related V4L2 device nodes. Some really complex
+hardware use the Media Controller (see :ref:`media_controller`) which can
+be used for this purpose. But several drivers do not use it, and while some
+code exists that uses sysfs to discover related V4L2 device nodes (see
+libmedia_dev in the
+`v4l-utils <http://git.linuxtv.org/cgit.cgi/v4l-utils.git/>`__ git
+repository), there is no library yet that can provide a single API
+towards both Media Controller-based devices and devices that do not use
+the Media Controller. If you want to work on this please write to the
+linux-media mailing list:
+`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__.
+
+Multiple Opens
+==============
+
+V4L2 devices can be opened more than once. [#f1]_ When this is supported
+by the driver, users can for example start a "panel" application to
+change controls like brightness or audio volume, while another
+application captures video and audio. In other words, panel applications
+are comparable to an ALSA audio mixer application. Just opening a V4L2
+device should not change the state of the device. [#f2]_
+
+Once an application has allocated the memory buffers needed for
+streaming data (by calling the :ref:`VIDIOC_REQBUFS`
+or :ref:`VIDIOC_CREATE_BUFS` ioctls, or
+implicitly by calling the :c:func:`read()` or
+:c:func:`write()` functions) that application (filehandle)
+becomes the owner of the device. It is no longer allowed to make changes
+that would affect the buffer sizes (e.g. by calling the
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl) and other applications are
+no longer allowed to allocate buffers or start or stop streaming. The
+EBUSY error code will be returned instead.
+
+Merely opening a V4L2 device does not grant exclusive access. [#f3]_
+Initiating data exchange however assigns the right to read or write the
+requested type of data, and to change related properties, to this file
+descriptor. Applications can request additional access privileges using
+the priority mechanism described in :ref:`app-pri`.
+
+Shared Data Streams
+===================
+
+V4L2 drivers should not support multiple applications reading or writing
+the same data stream on a device by copying buffers, time multiplexing
+or similar means. This is better handled by a proxy application in user
+space.
+
+Functions
+=========
+
+To open and close V4L2 devices applications use the
+:c:func:`open()` and :c:func:`close()` function,
+respectively. Devices are programmed using the
+:ref:`ioctl() <func-ioctl>` function as explained in the following
+sections.
+
+.. [#f1]
+   There are still some old and obscure drivers that have not been
+   updated to allow for multiple opens. This implies that for such
+   drivers :c:func:`open()` can return an ``EBUSY`` error code
+   when the device is already in use.
+
+.. [#f2]
+   Unfortunately, opening a radio device often switches the state of the
+   device to radio mode in many drivers. This behavior should be fixed
+   eventually as it violates the V4L2 specification.
+
+.. [#f3]
+   Drivers could recognize the ``O_EXCL`` open flag. Presently this is
+   not required, so applications cannot know if it really works.
diff --git a/Documentation/userspace-api/media/v4l/pipeline.dot b/Documentation/userspace-api/media/v4l/pipeline.dot
new file mode 100644
index 000000000..8c53ce719
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pipeline.dot
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0
+
+digraph board {
+	rankdir=TB
+	colorscheme=x11
+	scaler [label="{<scaler_0> 0} | Host\nScaler | {<scaler_1> 1} ", shape=Mrecord, style=filled, fillcolor=lightblue]
+	frontend [label="{<frontend_0> 0} | Host\nFrontend | {<frontend_1> 1}", shape=Mrecord, style=filled, fillcolor=lightblue]
+	sensor [label="Sensor | {<sensor_0> 0}", shape=Mrecord, style=filled, fillcolor=aquamarine]
+	io [label="{<io_0> 0} | V4L I/O", shape=Mrecord, style=filled, fillcolor=aquamarine]
+
+	sensor:sensor_0 -> frontend:frontend_0 [color=blue, label="HQ: 2592x1968\nHS: 1296x984"]
+	frontend:frontend_1 -> scaler:scaler_0 [color=blue, label="HQ: 2592x1968\nHS: 1296x984"]
+	scaler:scaler_1 -> io:io_0 [color=blue, label="HQ: 1280x720\nHS: 1280x720"]
+}
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-bayer.rst b/Documentation/userspace-api/media/v4l/pixfmt-bayer.rst
new file mode 100644
index 000000000..2500413e5
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-bayer.rst
@@ -0,0 +1,32 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _pixfmt-bayer:
+
+*****************
+Raw Bayer Formats
+*****************
+
+Description
+===========
+
+The raw Bayer formats are used by image sensors before much if any processing is
+performed on the image. The formats contain green, red and blue components, with
+alternating lines of red and green, and blue and green pixels in different
+orders. See also `the Wikipedia article on Bayer filter
+<https://en.wikipedia.org/wiki/Bayer_filter>`__.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-srggb8
+    pixfmt-srggb10
+    pixfmt-srggb10p
+    pixfmt-srggb10alaw8
+    pixfmt-srggb10dpcm8
+    pixfmt-srggb10-ipu3
+    pixfmt-srggb12
+    pixfmt-srggb12p
+    pixfmt-srggb14
+    pixfmt-srggb14p
+    pixfmt-srggb16
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-cnf4.rst b/Documentation/userspace-api/media/v4l/pixfmt-cnf4.rst
new file mode 100644
index 000000000..8f469290c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-cnf4.rst
@@ -0,0 +1,31 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _V4L2-PIX-FMT-CNF4:
+
+******************************
+V4L2_PIX_FMT_CNF4 ('CNF4')
+******************************
+
+Depth sensor confidence information as a 4 bits per pixel packed array
+
+Description
+===========
+
+Proprietary format used by Intel RealSense Depth cameras containing depth
+confidence information in range 0-15 with 0 indicating that the sensor was
+unable to resolve any signal and 15 indicating maximum level of confidence for
+the specific sensor (actual error margins might change from sensor to sensor).
+
+Every two consecutive pixels are packed into a single byte.
+Bits 0-3 of byte n refer to confidence value of depth pixel 2*n,
+bits 4-7 to confidence value of depth pixel 2*n+1.
+
+**Bit-packed representation.**
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 64 64
+
+    * - Y'\ :sub:`01[3:0]`\ (bits 7--4) Y'\ :sub:`00[3:0]`\ (bits 3--0)
+      - Y'\ :sub:`03[3:0]`\ (bits 7--4) Y'\ :sub:`02[3:0]`\ (bits 3--0)
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
new file mode 100644
index 000000000..d585909bc
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
@@ -0,0 +1,225 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+******************
+Compressed Formats
+******************
+
+
+.. _compressed-formats:
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. flat-table:: Compressed Image Formats
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - Identifier
+      - Code
+      - Details
+    * .. _V4L2-PIX-FMT-JPEG:
+
+      - ``V4L2_PIX_FMT_JPEG``
+      - 'JPEG'
+      - TBD. See also :ref:`VIDIOC_G_JPEGCOMP <VIDIOC_G_JPEGCOMP>`,
+	:ref:`VIDIOC_S_JPEGCOMP <VIDIOC_G_JPEGCOMP>`.
+    * .. _V4L2-PIX-FMT-MPEG:
+
+      - ``V4L2_PIX_FMT_MPEG``
+      - 'MPEG'
+      - MPEG multiplexed stream. The actual format is determined by
+	extended control ``V4L2_CID_MPEG_STREAM_TYPE``, see
+	:ref:`mpeg-control-id`.
+    * .. _V4L2-PIX-FMT-H264:
+
+      - ``V4L2_PIX_FMT_H264``
+      - 'H264'
+      - H264 Access Unit.
+	The decoder expects one Access Unit per buffer.
+	The encoder generates one Access Unit per buffer.
+	If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
+	then the decoder has no requirements since it can parse all the
+	information from the raw bytestream.
+    * .. _V4L2-PIX-FMT-H264-NO-SC:
+
+      - ``V4L2_PIX_FMT_H264_NO_SC``
+      - 'AVC1'
+      - H264 video elementary stream without start codes.
+    * .. _V4L2-PIX-FMT-H264-MVC:
+
+      - ``V4L2_PIX_FMT_H264_MVC``
+      - 'M264'
+      - H264 MVC video elementary stream.
+    * .. _V4L2-PIX-FMT-H264-SLICE:
+
+      - ``V4L2_PIX_FMT_H264_SLICE``
+      - 'S264'
+      - H264 parsed slice data, including slice headers, either with or
+	without the start code, as extracted from the H264 bitstream.
+	This format is adapted for stateless video decoders that implement an
+	H264 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
+	This pixelformat has two modifiers that must be set at least once
+	through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE``
+        and ``V4L2_CID_MPEG_VIDEO_H264_START_CODE`` controls.
+	In addition, metadata associated with the frame to decode are
+	required to be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``,
+	``V4L2_CID_MPEG_VIDEO_H264_PPS``,
+	``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX``,
+	``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS`` and
+	``V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS`` controls.  See the
+	:ref:`associated Codec Control IDs <v4l2-mpeg-h264>`.  Exactly
+	one output and one capture buffer must be provided for use
+	with this pixel format. The output buffer must contain the
+	appropriate number of macroblocks to decode a full
+	corresponding frame to the matching capture buffer.
+
+	The syntax for this format is documented in :ref:`h264`, section
+	7.3.2.8 "Slice layer without partitioning RBSP syntax" and the following
+	sections.
+
+	.. note::
+
+	   This format is not yet part of the public kernel API and it
+	   is expected to change.
+
+    * .. _V4L2-PIX-FMT-H263:
+
+      - ``V4L2_PIX_FMT_H263``
+      - 'H263'
+      - H263 video elementary stream.
+    * .. _V4L2-PIX-FMT-MPEG1:
+
+      - ``V4L2_PIX_FMT_MPEG1``
+      - 'MPG1'
+      - MPEG1 Picture. Each buffer starts with a Picture header, followed
+	by other headers as needed and ending with the Picture data.
+	If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
+	then the decoder has no requirements since it can parse all the
+	information from the raw bytestream.
+    * .. _V4L2-PIX-FMT-MPEG2:
+
+      - ``V4L2_PIX_FMT_MPEG2``
+      - 'MPG2'
+      - MPEG2 Picture. Each buffer starts with a Picture header, followed
+	by other headers as needed and ending with the Picture data.
+	If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
+	then the decoder has no requirements since it can parse all the
+	information from the raw bytestream.
+    * .. _V4L2-PIX-FMT-MPEG2-SLICE:
+
+      - ``V4L2_PIX_FMT_MPEG2_SLICE``
+      - 'MG2S'
+      - MPEG-2 parsed slice data, as extracted from the MPEG-2 bitstream.
+	This format is adapted for stateless video decoders that implement a
+	MPEG-2 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
+	Metadata associated with the frame to decode is required to be passed
+	through the ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS`` control and
+	quantization matrices can optionally be specified through the
+	``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION`` control.
+	See the :ref:`associated Codec Control IDs <v4l2-mpeg-mpeg2>`.
+	Exactly one output and one capture buffer must be provided for use with
+	this pixel format. The output buffer must contain the appropriate number
+	of macroblocks to decode a full corresponding frame to the matching
+	capture buffer.
+    * .. _V4L2-PIX-FMT-MPEG4:
+
+      - ``V4L2_PIX_FMT_MPEG4``
+      - 'MPG4'
+      - MPEG4 video elementary stream.
+    * .. _V4L2-PIX-FMT-XVID:
+
+      - ``V4L2_PIX_FMT_XVID``
+      - 'XVID'
+      - Xvid video elementary stream.
+    * .. _V4L2-PIX-FMT-VC1-ANNEX-G:
+
+      - ``V4L2_PIX_FMT_VC1_ANNEX_G``
+      - 'VC1G'
+      - VC1, SMPTE 421M Annex G compliant stream.
+    * .. _V4L2-PIX-FMT-VC1-ANNEX-L:
+
+      - ``V4L2_PIX_FMT_VC1_ANNEX_L``
+      - 'VC1L'
+      - VC1, SMPTE 421M Annex L compliant stream.
+    * .. _V4L2-PIX-FMT-VP8:
+
+      - ``V4L2_PIX_FMT_VP8``
+      - 'VP80'
+      - VP8 compressed video frame. The encoder generates one
+	compressed frame per buffer, and the decoder requires one
+	compressed frame per buffer.
+    * .. _V4L2-PIX-FMT-VP8-FRAME:
+
+      - ``V4L2_PIX_FMT_VP8_FRAME``
+      - 'VP8F'
+      - VP8 parsed frame, as extracted from the container.
+	This format is adapted for stateless video decoders that implement a
+	VP8 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
+	Metadata associated with the frame to decode is required to be passed
+	through the ``V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER`` control.
+	See the :ref:`associated Codec Control IDs <v4l2-mpeg-vp8>`.
+	Exactly one output and one capture buffer must be provided for use with
+	this pixel format. The output buffer must contain the appropriate number
+	of macroblocks to decode a full corresponding frame to the matching
+	capture buffer.
+
+	.. note::
+
+	   This format is not yet part of the public kernel API and it
+	   is expected to change.
+
+    * .. _V4L2-PIX-FMT-VP9:
+
+      - ``V4L2_PIX_FMT_VP9``
+      - 'VP90'
+      - VP9 compressed video frame. The encoder generates one
+	compressed frame per buffer, and the decoder requires one
+	compressed frame per buffer.
+    * .. _V4L2-PIX-FMT-HEVC:
+
+      - ``V4L2_PIX_FMT_HEVC``
+      - 'HEVC'
+      - HEVC/H.265 Access Unit.
+	The decoder expects one Access Unit per buffer.
+	The encoder generates one Access Unit per buffer.
+	If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
+	then the decoder has no	requirements since it can parse all the
+	information from the raw bytestream.
+    * .. _V4L2-PIX-FMT-HEVC-SLICE:
+
+      - ``V4L2_PIX_FMT_HEVC_SLICE``
+      - 'S265'
+      - HEVC parsed slice data, as extracted from the HEVC bitstream.
+	This format is adapted for stateless video decoders that implement a
+	HEVC pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
+	This pixelformat has two modifiers that must be set at least once
+	through the ``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE``
+        and ``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE`` controls.
+	Metadata associated with the frame to decode is required to be passed
+	through the following controls :
+        * ``V4L2_CID_MPEG_VIDEO_HEVC_SPS``
+        * ``V4L2_CID_MPEG_VIDEO_HEVC_PPS``
+        * ``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS``
+	See the :ref:`associated Codec Control IDs <v4l2-mpeg-hevc>`.
+	Buffers associated with this pixel format must contain the appropriate
+	number of macroblocks to decode a full corresponding frame.
+
+	.. note::
+
+	   This format is not yet part of the public kernel API and it
+	   is expected to change.
+    * .. _V4L2-PIX-FMT-FWHT:
+
+      - ``V4L2_PIX_FMT_FWHT``
+      - 'FWHT'
+      - Video elementary stream using a codec based on the Fast Walsh Hadamard
+        Transform. This codec is implemented by the vicodec ('Virtual Codec')
+	driver. See the codec-fwht.h header for more details.
+	:ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
+	since the decoder can parse all the information from the raw bytestream.
+    * .. _V4L2-PIX-FMT-FWHT-STATELESS:
+
+      - ``V4L2_PIX_FMT_FWHT_STATELESS``
+      - 'SFWH'
+      - Same format as V4L2_PIX_FMT_FWHT but requires stateless codec implementation.
+	See the :ref:`associated Codec Control IDs <v4l2-mpeg-fwht>`.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-grey.rst b/Documentation/userspace-api/media/v4l/pixfmt-grey.rst
new file mode 100644
index 000000000..121365b03
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-grey.rst
@@ -0,0 +1,44 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-GREY:
+
+**************************
+V4L2_PIX_FMT_GREY ('GREY')
+**************************
+
+Grey-scale image
+
+
+Description
+===========
+
+This is a grey-scale image. It is really a degenerate Y'CbCr format
+which simply contains no Cb or Cr data.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-indexed.rst b/Documentation/userspace-api/media/v4l/pixfmt-indexed.rst
new file mode 100644
index 000000000..5bd4a47c5
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-indexed.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _pixfmt-indexed:
+
+**************
+Indexed Format
+**************
+
+In this format each pixel is represented by an 8 bit index into a 256
+entry ARGB palette. It is intended for
+:ref:`Video Output Overlays <osd>` only. There are no ioctls to access
+the palette, this must be done with ioctls of the Linux framebuffer API.
+
+
+
+.. flat-table:: Indexed Image Format
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`7` Byte 0
+    * -
+      -
+      - Bit
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _V4L2-PIX-FMT-PAL8:
+
+      - ``V4L2_PIX_FMT_PAL8``
+      - 'PAL8'
+      -
+      - i\ :sub:`7`
+      - i\ :sub:`6`
+      - i\ :sub:`5`
+      - i\ :sub:`4`
+      - i\ :sub:`3`
+      - i\ :sub:`2`
+      - i\ :sub:`1`
+      - i\ :sub:`0`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-intro.rst b/Documentation/userspace-api/media/v4l/pixfmt-intro.rst
new file mode 100644
index 000000000..14239ee82
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-intro.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+**********************
+Standard Image Formats
+**********************
+
+In order to exchange images between drivers and applications, it is
+necessary to have standard image data formats which both sides will
+interpret the same way. V4L2 includes several such formats, and this
+section is intended to be an unambiguous specification of the standard
+image data formats in V4L2.
+
+V4L2 drivers are not limited to these formats, however. Driver-specific
+formats are possible. In that case the application may depend on a codec
+to convert images to one of the standard formats when needed. But the
+data can still be stored and retrieved in the proprietary format. For
+example, a device may support a proprietary compressed format.
+Applications can still capture and save the data in the compressed
+format, saving much disk space, and later use a codec to convert the
+images to the X Windows screen format when the video is to be displayed.
+
+Even so, ultimately, some standard formats are needed, so the V4L2
+specification would not be complete without well-defined standard
+formats.
+
+The V4L2 standard formats are mainly uncompressed formats. The pixels
+are always arranged in memory from left to right, and from top to
+bottom. The first byte of data in the image buffer is always for the
+leftmost pixel of the topmost row. Following that is the pixel
+immediately to its right, and so on until the end of the top row of
+pixels. Following the rightmost pixel of the row there may be zero or
+more bytes of padding to guarantee that each row of pixel data has a
+certain alignment. Following the pad bytes, if any, is data for the
+leftmost pixel of the second row from the top, and so on. The last row
+has just as many pad bytes after it as the other rows.
+
+In V4L2 each format has an identifier which looks like ``PIX_FMT_XXX``,
+defined in the :ref:`videodev2.h <videodev>` header file. These
+identifiers represent
+:ref:`four character (FourCC) codes <v4l2-fourcc>` which are also
+listed below, however they are not the same as those used in the Windows
+world.
+
+For some formats, data is stored in separate, discontiguous memory
+buffers. Those formats are identified by a separate set of FourCC codes
+and are referred to as "multi-planar formats". For example, a
+:ref:`YUV422 <V4L2-PIX-FMT-YUV422M>` frame is normally stored in one
+memory buffer, but it can also be placed in two or three separate
+buffers, with Y component in one buffer and CbCr components in another
+in the 2-planar version or with each component in its own buffer in the
+3-planar case. Those sub-buffers are referred to as "*planes*".
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-inzi.rst b/Documentation/userspace-api/media/v4l/pixfmt-inzi.rst
new file mode 100644
index 000000000..3115c8f6a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-inzi.rst
@@ -0,0 +1,82 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-INZI:
+
+**************************
+V4L2_PIX_FMT_INZI ('INZI')
+**************************
+
+Infrared 10-bit linked with Depth 16-bit images
+
+
+Description
+===========
+
+Proprietary multi-planar format used by Intel SR300 Depth cameras, comprise of
+Infrared image followed by Depth data. The pixel definition is 32-bpp,
+with the Depth and Infrared Data split into separate continuous planes of
+identical dimensions.
+
+
+
+The first plane - Infrared data - is stored according to
+:ref:`V4L2_PIX_FMT_Y10 <V4L2-PIX-FMT-Y10>` greyscale format.
+Each pixel is 16-bit cell, with actual data stored in the 10 LSBs
+with values in range 0 to 1023.
+The six remaining MSBs are padded with zeros.
+
+
+The second plane provides 16-bit per-pixel Depth data arranged in
+:ref:`V4L2-PIX-FMT-Z16 <V4L2-PIX-FMT-Z16>` format.
+
+
+**Frame Structure.**
+Each cell is a 16-bit word with more significant data stored at higher
+memory address (byte order is little-endian).
+
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{2.5cm}|p{2.5cm}|p{2.5cm}|p{2.5cm}|p{2.5cm}|p{2.5cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 1
+    :widths:    1 1 1 1 1 1
+
+    * - Ir\ :sub:`0,0`
+      - Ir\ :sub:`0,1`
+      - Ir\ :sub:`0,2`
+      - ...
+      - ...
+      - ...
+    * - :cspan:`5` ...
+    * - :cspan:`5` Infrared Data
+    * - :cspan:`5` ...
+    * - ...
+      - ...
+      - ...
+      - Ir\ :sub:`n-1,n-3`
+      - Ir\ :sub:`n-1,n-2`
+      - Ir\ :sub:`n-1,n-1`
+    * - Depth\ :sub:`0,0`
+      - Depth\ :sub:`0,1`
+      - Depth\ :sub:`0,2`
+      - ...
+      - ...
+      - ...
+    * - :cspan:`5` ...
+    * - :cspan:`5` Depth Data
+    * - :cspan:`5` ...
+    * - ...
+      - ...
+      - ...
+      - Depth\ :sub:`n-1,n-3`
+      - Depth\ :sub:`n-1,n-2`
+      - Depth\ :sub:`n-1,n-1`
+
+.. raw:: latex
+
+    \normalsize
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-m420.rst b/Documentation/userspace-api/media/v4l/pixfmt-m420.rst
new file mode 100644
index 000000000..13cf36a8c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-m420.rst
@@ -0,0 +1,126 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-M420:
+
+**************************
+V4L2_PIX_FMT_M420 ('M420')
+**************************
+
+Format with ½ horizontal and vertical chroma resolution, also known as
+YUV 4:2:0. Hybrid plane line-interleaved layout.
+
+
+Description
+===========
+
+M420 is a YUV format with ½ horizontal and vertical chroma subsampling
+(YUV 4:2:0). Pixels are organized as interleaved luma and chroma planes.
+Two lines of luma data are followed by one line of chroma data.
+
+The luma plane has one byte per pixel. The chroma plane contains
+interleaved CbCr pixels subsampled by ½ in the horizontal and vertical
+directions. Each CbCr pair belongs to four pixels. For example,
+Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`,
+Y'\ :sub:`10`, Y'\ :sub:`11`.
+
+All line lengths are identical: if the Y lines include pad bytes so do
+the CbCr lines.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+    * - start + 16:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 20:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 24:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 1
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+    * - 2
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 3
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-meta-d4xx.rst b/Documentation/userspace-api/media/v4l/pixfmt-meta-d4xx.rst
new file mode 100644
index 000000000..4e437ba97
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-meta-d4xx.rst
@@ -0,0 +1,213 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-meta-fmt-d4xx:
+
+*******************************
+V4L2_META_FMT_D4XX ('D4XX')
+*******************************
+
+Intel D4xx UVC Cameras Metadata
+
+
+Description
+===========
+
+Intel D4xx (D435 and other) cameras include per-frame metadata in their UVC
+payload headers, following the Microsoft(R) UVC extension proposal [1_]. That
+means, that the private D4XX metadata, following the standard UVC header, is
+organised in blocks. D4XX cameras implement several standard block types,
+proposed by Microsoft, and several proprietary ones. Supported standard metadata
+types are MetadataId_CaptureStats (ID 3), MetadataId_CameraExtrinsics (ID 4),
+and MetadataId_CameraIntrinsics (ID 5). For their description see [1_]. This
+document describes proprietary metadata types, used by D4xx cameras.
+
+V4L2_META_FMT_D4XX buffers follow the metadata buffer layout of
+V4L2_META_FMT_UVC with the only difference, that it also includes proprietary
+payload header data. D4xx cameras use bulk transfers and only send one payload
+per frame, therefore their headers cannot be larger than 255 bytes.
+
+Below are proprietary Microsoft style metadata types, used by D4xx cameras,
+where all fields are in little endian order:
+
+.. tabularcolumns:: |p{5.0cm}|p{12.5cm}|
+
+
+.. flat-table:: D4xx metadata
+    :widths: 1 2
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - **Field**
+      - **Description**
+    * - :cspan:`1` *Depth Control*
+    * - __u32 ID
+      - 0x80000000
+    * - __u32 Size
+      - Size in bytes (currently 56)
+    * - __u32 Version
+      - Version of this structure. The documentation herein corresponds to
+        version xxx. The version number will be incremented when new fields are
+        added.
+    * - __u32 Flags
+      - A bitmask of flags: see [2_] below
+    * - __u32 Gain
+      - Gain value in internal units, same as the V4L2_CID_GAIN control, used to
+	capture the frame
+    * - __u32 Exposure
+      - Exposure time (in microseconds) used to capture the frame
+    * - __u32 Laser power
+      - Power of the laser LED 0-360, used for depth measurement
+    * - __u32 AE mode
+      - 0: manual; 1: automatic exposure
+    * - __u32 Exposure priority
+      - Exposure priority value: 0 - constant frame rate
+    * - __u32 AE ROI left
+      - Left border of the AE Region of Interest (all ROI values are in pixels
+	and lie between 0 and maximum width or height respectively)
+    * - __u32 AE ROI right
+      - Right border of the AE Region of Interest
+    * - __u32 AE ROI top
+      - Top border of the AE Region of Interest
+    * - __u32 AE ROI bottom
+      - Bottom border of the AE Region of Interest
+    * - __u32 Preset
+      - Preset selector value, default: 0, unless changed by the user
+    * - __u32 Laser mode
+      - 0: off, 1: on
+    * - :cspan:`1` *Capture Timing*
+    * - __u32 ID
+      - 0x80000001
+    * - __u32 Size
+      - Size in bytes (currently 40)
+    * - __u32 Version
+      - Version of this structure. The documentation herein corresponds to
+        version xxx. The version number will be incremented when new fields are
+        added.
+    * - __u32 Flags
+      - A bitmask of flags: see [3_] below
+    * - __u32 Frame counter
+      - Monotonically increasing counter
+    * - __u32 Optical time
+      - Time in microseconds from the beginning of a frame till its middle
+    * - __u32 Readout time
+      - Time, used to read out a frame in microseconds
+    * - __u32 Exposure time
+      - Frame exposure time in microseconds
+    * - __u32 Frame interval
+      - In microseconds = 1000000 / framerate
+    * - __u32 Pipe latency
+      - Time in microseconds from start of frame to data in USB buffer
+    * - :cspan:`1` *Configuration*
+    * - __u32 ID
+      - 0x80000002
+    * - __u32 Size
+      - Size in bytes (currently 40)
+    * - __u32 Version
+      - Version of this structure. The documentation herein corresponds to
+        version xxx. The version number will be incremented when new fields are
+        added.
+    * - __u32 Flags
+      - A bitmask of flags: see [4_] below
+    * - __u8 Hardware type
+      - Camera hardware version [5_]
+    * - __u8 SKU ID
+      - Camera hardware configuration [6_]
+    * - __u32 Cookie
+      - Internal synchronisation
+    * - __u16 Format
+      - Image format code [7_]
+    * - __u16 Width
+      - Width in pixels
+    * - __u16 Height
+      - Height in pixels
+    * - __u16 Framerate
+      - Requested frame rate per second
+    * - __u16 Trigger
+      - Byte 0: bit 0: depth and RGB are synchronised, bit 1: external trigger
+
+.. _1:
+
+[1] https://docs.microsoft.com/en-us/windows-hardware/drivers/stream/uvc-extensions-1-5
+
+.. _2:
+
+[2] Depth Control flags specify which fields are valid: ::
+
+  0x00000001 Gain
+  0x00000002 Exposure
+  0x00000004 Laser power
+  0x00000008 AE mode
+  0x00000010 Exposure priority
+  0x00000020 AE ROI
+  0x00000040 Preset
+
+.. _3:
+
+[3] Capture Timing flags specify which fields are valid: ::
+
+  0x00000001 Frame counter
+  0x00000002 Optical time
+  0x00000004 Readout time
+  0x00000008 Exposure time
+  0x00000010 Frame interval
+  0x00000020 Pipe latency
+
+.. _4:
+
+[4] Configuration flags specify which fields are valid: ::
+
+  0x00000001 Hardware type
+  0x00000002 SKU ID
+  0x00000004 Cookie
+  0x00000008 Format
+  0x00000010 Width
+  0x00000020 Height
+  0x00000040 Framerate
+  0x00000080 Trigger
+  0x00000100 Cal count
+
+.. _5:
+
+[5] Camera model: ::
+
+  0 DS5
+  1 IVCAM2
+
+.. _6:
+
+[6] 8-bit camera hardware configuration bitfield: ::
+
+  [1:0] depthCamera
+	00: no depth
+	01: standard depth
+	10: wide depth
+	11: reserved
+  [2]   depthIsActive - has a laser projector
+  [3]   RGB presence
+  [4]   Inertial Measurement Unit (IMU) presence
+  [5]   projectorType
+	0: HPTG
+	1: Princeton
+  [6]   0: a projector, 1: an LED
+  [7]   reserved
+
+.. _7:
+
+[7] Image format codes per video streaming interface:
+
+Depth: ::
+
+  1 Z16
+  2 Z
+
+Left sensor: ::
+
+  1 Y8
+  2 UYVY
+  3 R8L8
+  4 Calibration
+  5 W10
+
+Fish Eye sensor: ::
+
+  1 RAW8
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-meta-intel-ipu3.rst b/Documentation/userspace-api/media/v4l/pixfmt-meta-intel-ipu3.rst
new file mode 100644
index 000000000..5f33d3553
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-meta-intel-ipu3.rst
@@ -0,0 +1,81 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-meta-fmt-params:
+.. _v4l2-meta-fmt-stat-3a:
+
+******************************************************************
+V4L2_META_FMT_IPU3_PARAMS ('ip3p'), V4L2_META_FMT_IPU3_3A ('ip3s')
+******************************************************************
+
+.. ipu3_uapi_stats_3a
+
+3A statistics
+=============
+
+The IPU3 ImgU 3A statistics accelerators collect different statistics over
+an input Bayer frame. Those statistics are obtained from the "ipu3-imgu [01] 3a
+stat" metadata capture video nodes, using the :c:type:`v4l2_meta_format`
+interface. They are formatted as described by the :c:type:`ipu3_uapi_stats_3a`
+structure.
+
+The statistics collected are AWB (Auto-white balance) RGBS (Red, Green, Blue and
+Saturation measure) cells, AWB filter response, AF (Auto-focus) filter response,
+and AE (Auto-exposure) histogram.
+
+The struct :c:type:`ipu3_uapi_4a_config` saves all configurable parameters.
+
+.. code-block:: c
+
+	struct ipu3_uapi_stats_3a {
+		struct ipu3_uapi_awb_raw_buffer awb_raw_buffer;
+		struct ipu3_uapi_ae_raw_buffer_aligned ae_raw_buffer[IPU3_UAPI_MAX_STRIPES];
+		struct ipu3_uapi_af_raw_buffer af_raw_buffer;
+		struct ipu3_uapi_awb_fr_raw_buffer awb_fr_raw_buffer;
+		struct ipu3_uapi_4a_config stats_4a_config;
+		__u32 ae_join_buffers;
+		__u8 padding[28];
+		struct ipu3_uapi_stats_3a_bubble_info_per_stripe stats_3a_bubble_per_stripe;
+		struct ipu3_uapi_ff_status stats_3a_status;
+	};
+
+.. ipu3_uapi_params
+
+Pipeline parameters
+===================
+
+The pipeline parameters are passed to the "ipu3-imgu [01] parameters" metadata
+output video nodes, using the :c:type:`v4l2_meta_format` interface. They are
+formatted as described by the :c:type:`ipu3_uapi_params` structure.
+
+Both 3A statistics and pipeline parameters described here are closely tied to
+the underlying camera sub-system (CSS) APIs. They are usually consumed and
+produced by dedicated user space libraries that comprise the important tuning
+tools, thus freeing the developers from being bothered with the low level
+hardware and algorithm details.
+
+.. code-block:: c
+
+	struct ipu3_uapi_params {
+		/* Flags which of the settings below are to be applied */
+		struct ipu3_uapi_flags use;
+
+		/* Accelerator cluster parameters */
+		struct ipu3_uapi_acc_param acc_param;
+
+		/* ISP vector address space parameters */
+		struct ipu3_uapi_isp_lin_vmem_params lin_vmem_params;
+		struct ipu3_uapi_isp_tnr3_vmem_params tnr3_vmem_params;
+		struct ipu3_uapi_isp_xnr3_vmem_params xnr3_vmem_params;
+
+		/* ISP data memory (DMEM) parameters */
+		struct ipu3_uapi_isp_tnr3_params tnr3_dmem_params;
+		struct ipu3_uapi_isp_xnr3_params xnr3_dmem_params;
+
+		/* Optical black level compensation */
+		struct ipu3_uapi_obgrid_param obgrid_param;
+	};
+
+Intel IPU3 ImgU uAPI data types
+===============================
+
+.. kernel-doc:: drivers/staging/media/ipu3/include/intel-ipu3.h
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst b/Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst
new file mode 100644
index 000000000..7e43837ed
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst
@@ -0,0 +1,49 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. _v4l2-meta-fmt-params-rkisp1:
+.. _v4l2-meta-fmt-stat-rkisp1:
+
+*****************************************************************************
+V4L2_META_FMT_RK_ISP1_PARAMS ('rk1p'), V4L2_META_FMT_RK_ISP1_STAT_3A ('rk1s')
+*****************************************************************************
+
+Configuration parameters
+========================
+
+The configuration parameters are passed to the
+:ref:`rkisp1_params <rkisp1_params>` metadata output video node, using
+the :c:type:`v4l2_meta_format` interface. The buffer contains
+a single instance of the C structure :c:type:`rkisp1_params_cfg` defined in
+``rkisp1-config.h``. So the structure can be obtained from the buffer by:
+
+.. code-block:: c
+
+	struct rkisp1_params_cfg *params = (struct rkisp1_params_cfg*) buffer;
+
+.. rkisp1_stat_buffer
+
+3A and histogram statistics
+===========================
+
+The ISP1 device collects different statistics over an input Bayer frame.
+Those statistics are obtained from the :ref:`rkisp1_stats <rkisp1_stats>`
+metadata capture video node,
+using the :c:type:`v4l2_meta_format` interface. The buffer contains a single
+instance of the C structure :c:type:`rkisp1_stat_buffer` defined in
+``rkisp1-config.h``. So the structure can be obtained from the buffer by:
+
+.. code-block:: c
+
+	struct rkisp1_stat_buffer *stats = (struct rkisp1_stat_buffer*) buffer;
+
+The statistics collected are Exposure, AWB (Auto-white balance), Histogram and
+AF (Auto-focus). See :c:type:`rkisp1_stat_buffer` for details of the statistics.
+
+The 3A statistics and configuration parameters described here are usually
+consumed and produced by dedicated user space libraries that comprise the
+important tuning tools using software control loop.
+
+rkisp1 uAPI data types
+======================
+
+.. kernel-doc:: drivers/staging/media/rkisp1/uapi/rkisp1-config.h
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-meta-uvc.rst b/Documentation/userspace-api/media/v4l/pixfmt-meta-uvc.rst
new file mode 100644
index 000000000..784346d14
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-meta-uvc.rst
@@ -0,0 +1,51 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-meta-fmt-uvc:
+
+*******************************
+V4L2_META_FMT_UVC ('UVCH')
+*******************************
+
+UVC Payload Header Data
+
+
+Description
+===========
+
+This format describes standard UVC metadata, extracted from UVC packet headers
+and provided by the UVC driver through metadata video nodes. That data includes
+exact copies of the standard part of UVC Payload Header contents and auxiliary
+timing information, required for precise interpretation of timestamps, contained
+in those headers. See section "2.4.3.3 Video and Still Image Payload Headers" of
+the "UVC 1.5 Class specification" for details.
+
+Each UVC payload header can be between 2 and 12 bytes large. Buffers can
+contain multiple headers, if multiple such headers have been transmitted by the
+camera for the respective frame. However, the driver may drop headers when the
+buffer is full, when they contain no useful information (e.g. those without the
+SCR field or with that field identical to the previous header), or generally to
+perform rate limiting when the device sends a large number of headers.
+
+Each individual block contains the following fields:
+
+.. flat-table:: UVC Metadata Block
+    :widths: 1 4
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Field
+      - Description
+    * - __u64 ts;
+      - system timestamp in host byte order, measured by the driver upon
+        reception of the payload
+    * - __u16 sof;
+      - USB Frame Number in host byte order, also obtained by the driver as
+        close as possible to the above timestamp to enable correlation between
+        them
+    * - :cspan:`1` *The rest is an exact copy of the UVC payload header:*
+    * - __u8 length;
+      - length of the rest of the block, including this field
+    * - __u8 flags;
+      - Flags, indicating presence of other standard UVC fields
+    * - __u8 buf[];
+      - The rest of the header, possibly including UVC PTS and SCR fields
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-meta-vivid.rst b/Documentation/userspace-api/media/v4l/pixfmt-meta-vivid.rst
new file mode 100644
index 000000000..7173e2c3e
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-meta-vivid.rst
@@ -0,0 +1,36 @@
+.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-meta-fmt-vivid:
+
+*******************************
+V4L2_META_FMT_VIVID ('VIVD')
+*******************************
+
+VIVID Metadata Format
+
+
+Description
+===========
+
+This describes metadata format used by the vivid driver.
+
+It sets Brightness, Saturation, Contrast and Hue, each of which maps to
+corresponding controls of the vivid driver with respect to the range and default values.
+
+It contains the following fields:
+
+.. flat-table:: VIVID Metadata
+    :widths: 1 4
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Field
+      - Description
+    * - u16 brightness;
+      - Image brightness, the value is in the range 0 to 255, with the default value as 128.
+    * - u16 contrast;
+      - Image contrast, the value is in the range 0 to 255, with the default value as 128.
+    * - u16 saturation;
+      - Image color saturation, the value is in the range 0 to 255, with the default value as 128.
+    * - s16 hue;
+      - Image color balance, the value is in the range -128 to 128, with the default value as 0.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-meta-vsp1-hgo.rst b/Documentation/userspace-api/media/v4l/pixfmt-meta-vsp1-hgo.rst
new file mode 100644
index 000000000..8d886feb1
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-meta-vsp1-hgo.rst
@@ -0,0 +1,168 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-meta-fmt-vsp1-hgo:
+
+*******************************
+V4L2_META_FMT_VSP1_HGO ('VSPH')
+*******************************
+
+Renesas R-Car VSP1 1-D Histogram Data
+
+
+Description
+===========
+
+This format describes histogram data generated by the Renesas R-Car VSP1 1-D
+Histogram (HGO) engine.
+
+The VSP1 HGO is a histogram computation engine that can operate on RGB, YCrCb
+or HSV data. It operates on a possibly cropped and subsampled input image and
+computes the minimum, maximum and sum of all pixels as well as per-channel
+histograms.
+
+The HGO can compute histograms independently per channel, on the maximum of the
+three channels (RGB data only) or on the Y channel only (YCbCr only). It can
+additionally output the histogram with 64 or 256 bins, resulting in four
+possible modes of operation.
+
+- In *64 bins normal mode*, the HGO operates on the three channels independently
+  to compute three 64-bins histograms. RGB, YCbCr and HSV image formats are
+  supported.
+- In *64 bins maximum mode*, the HGO operates on the maximum of the (R, G, B)
+  channels to compute a single 64-bins histogram. Only the RGB image format is
+  supported.
+- In *256 bins normal mode*, the HGO operates on the Y channel to compute a
+  single 256-bins histogram. Only the YCbCr image format is supported.
+- In *256 bins maximum mode*, the HGO operates on the maximum of the (R, G, B)
+  channels to compute a single 256-bins histogram. Only the RGB image format is
+  supported.
+
+**Byte Order.**
+All data is stored in memory in little endian format. Each cell in the tables
+contains one byte.
+
+.. flat-table:: VSP1 HGO Data - 64 Bins, Normal Mode (792 bytes)
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Offset
+      - :cspan:`4` Memory
+    * -
+      - [31:24]
+      - [23:16]
+      - [15:8]
+      - [7:0]
+    * - 0
+      -
+      - R/Cr/H max [7:0]
+      -
+      - R/Cr/H min [7:0]
+    * - 4
+      -
+      - G/Y/S max [7:0]
+      -
+      - G/Y/S min [7:0]
+    * - 8
+      -
+      - B/Cb/V max [7:0]
+      -
+      - B/Cb/V min [7:0]
+    * - 12
+      - :cspan:`4` R/Cr/H sum [31:0]
+    * - 16
+      - :cspan:`4` G/Y/S sum [31:0]
+    * - 20
+      - :cspan:`4` B/Cb/V sum [31:0]
+    * - 24
+      - :cspan:`4` R/Cr/H bin 0 [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 276
+      - :cspan:`4` R/Cr/H bin 63 [31:0]
+    * - 280
+      - :cspan:`4` G/Y/S bin 0 [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 532
+      - :cspan:`4` G/Y/S bin 63 [31:0]
+    * - 536
+      - :cspan:`4` B/Cb/V bin 0 [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 788
+      - :cspan:`4` B/Cb/V bin 63 [31:0]
+
+.. flat-table:: VSP1 HGO Data - 64 Bins, Max Mode (264 bytes)
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Offset
+      - :cspan:`4` Memory
+    * -
+      - [31:24]
+      - [23:16]
+      - [15:8]
+      - [7:0]
+    * - 0
+      -
+      - max(R,G,B) max [7:0]
+      -
+      - max(R,G,B) min [7:0]
+    * - 4
+      - :cspan:`4` max(R,G,B) sum [31:0]
+    * - 8
+      - :cspan:`4` max(R,G,B) bin 0 [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 260
+      - :cspan:`4` max(R,G,B) bin 63 [31:0]
+
+.. flat-table:: VSP1 HGO Data - 256 Bins, Normal Mode (1032 bytes)
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Offset
+      - :cspan:`4` Memory
+    * -
+      - [31:24]
+      - [23:16]
+      - [15:8]
+      - [7:0]
+    * - 0
+      -
+      - Y max [7:0]
+      -
+      - Y min [7:0]
+    * - 4
+      - :cspan:`4` Y sum [31:0]
+    * - 8
+      - :cspan:`4` Y bin 0 [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 1028
+      - :cspan:`4` Y bin 255 [31:0]
+
+.. flat-table:: VSP1 HGO Data - 256 Bins, Max Mode (1032 bytes)
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Offset
+      - :cspan:`4` Memory
+    * -
+      - [31:24]
+      - [23:16]
+      - [15:8]
+      - [7:0]
+    * - 0
+      -
+      - max(R,G,B) max [7:0]
+      -
+      - max(R,G,B) min [7:0]
+    * - 4
+      - :cspan:`4` max(R,G,B) sum [31:0]
+    * - 8
+      - :cspan:`4` max(R,G,B) bin 0 [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 1028
+      - :cspan:`4` max(R,G,B) bin 255 [31:0]
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-meta-vsp1-hgt.rst b/Documentation/userspace-api/media/v4l/pixfmt-meta-vsp1-hgt.rst
new file mode 100644
index 000000000..d8830ff60
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-meta-vsp1-hgt.rst
@@ -0,0 +1,129 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-meta-fmt-vsp1-hgt:
+
+*******************************
+V4L2_META_FMT_VSP1_HGT ('VSPT')
+*******************************
+
+Renesas R-Car VSP1 2-D Histogram Data
+
+
+Description
+===========
+
+This format describes histogram data generated by the Renesas R-Car VSP1
+2-D Histogram (HGT) engine.
+
+The VSP1 HGT is a histogram computation engine that operates on HSV
+data. It operates on a possibly cropped and subsampled input image and
+computes the sum, maximum and minimum of the S component as well as a
+weighted frequency histogram based on the H and S components.
+
+The histogram is a matrix of 6 Hue and 32 Saturation buckets, 192 in
+total. Each HSV value is added to one or more buckets with a weight
+between 1 and 16 depending on the Hue areas configuration. Finding the
+corresponding buckets is done by inspecting the H and S value independently.
+
+The Saturation position **n** (0 - 31) of the bucket in the matrix is
+found by the expression:
+
+    n = S / 8
+
+The Hue position **m** (0 - 5) of the bucket in the matrix depends on
+how the HGT Hue areas are configured. There are 6 user configurable Hue
+Areas which can be configured to cover overlapping Hue values:
+
+.. raw:: latex
+
+    \small
+
+::
+
+         Area 0       Area 1       Area 2       Area 3       Area 4       Area 5
+        ________     ________     ________     ________     ________     ________
+   \   /|      |\   /|      |\   /|      |\   /|      |\   /|      |\   /|      |\   /
+    \ / |      | \ / |      | \ / |      | \ / |      | \ / |      | \ / |      | \ /
+     X  |      |  X  |      |  X  |      |  X  |      |  X  |      |  X  |      |  X
+    / \ |      | / \ |      | / \ |      | / \ |      | / \ |      | / \ |      | / \
+   /   \|      |/   \|      |/   \|      |/   \|      |/   \|      |/   \|      |/   \
+  5U   0L      0U   1L      1U   2L      2U   3L      3U   4L      4U   5L      5U   0L
+        <0..............................Hue Value............................255>
+
+
+.. raw:: latex
+
+    \normalsize
+
+When two consecutive areas don't overlap (n+1L is equal to nU) the boundary
+value is considered as part of the lower area.
+
+Pixels with a hue value included in the centre of an area (between nL and nU
+included) are attributed to that single area and given a weight of 16. Pixels
+with a hue value included in the overlapping region between two areas (between
+n+1L and nU excluded) are attributed to both areas and given a weight for each
+of these areas proportional to their position along the diagonal lines
+(rounded down).
+
+The Hue area setup must match one of the following constrains:
+
+::
+
+    0L <= 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U
+
+::
+
+    0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U <= 0L
+
+**Byte Order.**
+All data is stored in memory in little endian format. Each cell in the tables
+contains one byte.
+
+.. flat-table:: VSP1 HGT Data - (776 bytes)
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Offset
+      - :cspan:`4` Memory
+    * -
+      - [31:24]
+      - [23:16]
+      - [15:8]
+      - [7:0]
+    * - 0
+      - -
+      - S max [7:0]
+      - -
+      - S min [7:0]
+    * - 4
+      - :cspan:`4` S sum [31:0]
+    * - 8
+      - :cspan:`4` Histogram bucket (m=0, n=0) [31:0]
+    * - 12
+      - :cspan:`4` Histogram bucket (m=0, n=1) [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 132
+      - :cspan:`4` Histogram bucket (m=0, n=31) [31:0]
+    * - 136
+      - :cspan:`4` Histogram bucket (m=1, n=0) [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 264
+      - :cspan:`4` Histogram bucket (m=2, n=0) [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 392
+      - :cspan:`4` Histogram bucket (m=3, n=0) [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 520
+      - :cspan:`4` Histogram bucket (m=4, n=0) [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 648
+      - :cspan:`4` Histogram bucket (m=5, n=0) [31:0]
+    * -
+      - :cspan:`4` ...
+    * - 772
+      - :cspan:`4` Histogram bucket (m=5, n=31) [31:0]
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-nv12.rst b/Documentation/userspace-api/media/v4l/pixfmt-nv12.rst
new file mode 100644
index 000000000..dd2f38129
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-nv12.rst
@@ -0,0 +1,129 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-NV12:
+.. _V4L2-PIX-FMT-NV21:
+
+******************************************************
+V4L2_PIX_FMT_NV12 ('NV12'), V4L2_PIX_FMT_NV21 ('NV21')
+******************************************************
+
+
+V4L2_PIX_FMT_NV21
+Formats with ½ horizontal and vertical chroma resolution, also known as
+YUV 4:2:0. One luminance and one chrominance plane with alternating
+chroma samples as opposed to ``V4L2_PIX_FMT_YVU420``
+
+
+Description
+===========
+
+These are two-plane versions of the YUV 4:2:0 format. The three
+components are separated into two sub-images or planes. The Y plane is
+first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_NV12``, a
+combined CbCr plane immediately follows the Y plane in memory. The CbCr
+plane is the same width, in bytes, as the Y plane (and of the image),
+but is half as tall in pixels. Each CbCr pair belongs to four pixels.
+For example, Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`,
+Y'\ :sub:`01`, Y'\ :sub:`10`, Y'\ :sub:`11`. ``V4L2_PIX_FMT_NV21`` is
+the same except the Cb and Cr bytes are swapped, the CrCb plane starts
+with a Cr byte.
+
+If the Y plane has pad bytes after each row, then the CbCr plane has as
+many pad bytes after its rows.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 16:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+    * - start + 20:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+
+
+**Color Sample Location:**
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 1
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+    * - 2
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 3
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-nv12m.rst b/Documentation/userspace-api/media/v4l/pixfmt-nv12m.rst
new file mode 100644
index 000000000..250f8b977
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-nv12m.rst
@@ -0,0 +1,144 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-NV12M:
+.. _v4l2-pix-fmt-nv12mt-16x16:
+.. _V4L2-PIX-FMT-NV21M:
+
+***********************************************************************************
+V4L2_PIX_FMT_NV12M ('NM12'), V4L2_PIX_FMT_NV21M ('NM21'), V4L2_PIX_FMT_NV12MT_16X16
+***********************************************************************************
+
+
+V4L2_PIX_FMT_NV21M
+V4L2_PIX_FMT_NV12MT_16X16
+Variation of ``V4L2_PIX_FMT_NV12`` and ``V4L2_PIX_FMT_NV21`` with planes
+non contiguous in memory.
+
+
+Description
+===========
+
+This is a multi-planar, two-plane version of the YUV 4:2:0 format. The
+three components are separated into two sub-images or planes.
+``V4L2_PIX_FMT_NV12M`` differs from ``V4L2_PIX_FMT_NV12`` in that the
+two planes are non-contiguous in memory, i.e. the chroma plane do not
+necessarily immediately follows the luma plane. The luminance data
+occupies the first plane. The Y plane has one byte per pixel. In the
+second plane there is a chrominance data with alternating chroma
+samples. The CbCr plane is the same width, in bytes, as the Y plane (and
+of the image), but is half as tall in pixels. Each CbCr pair belongs to
+four pixels. For example, Cb\ :sub:`0`/Cr\ :sub:`0` belongs to
+Y'\ :sub:`00`, Y'\ :sub:`01`, Y'\ :sub:`10`, Y'\ :sub:`11`.
+``V4L2_PIX_FMT_NV12MT_16X16`` is the tiled version of
+``V4L2_PIX_FMT_NV12M`` with 16x16 macroblock tiles. Here pixels are
+arranged in 16x16 2D tiles and tiles are arranged in linear order in
+memory. ``V4L2_PIX_FMT_NV21M`` is the same as ``V4L2_PIX_FMT_NV12M``
+except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr
+byte.
+
+``V4L2_PIX_FMT_NV12M`` is intended to be used only in drivers and
+applications that support the multi-planar API, described in
+:ref:`planar-apis`.
+
+If the Y plane has pad bytes after each row, then the CbCr plane has as
+many pad bytes after its rows.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start0 + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start0 + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start0 + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start0 + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * -
+    * - start1 + 0:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+    * - start1 + 4:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 1
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+    * - 2
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      -
+      - C
+      -
+    * - 3
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-nv12mt.rst b/Documentation/userspace-api/media/v4l/pixfmt-nv12mt.rst
new file mode 100644
index 000000000..46f63d793
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-nv12mt.rst
@@ -0,0 +1,60 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-NV12MT:
+
+****************************
+V4L2_PIX_FMT_NV12MT ('TM12')
+****************************
+
+Formats with ½ horizontal and vertical chroma resolution. This format
+has two planes - one for luminance and one for chrominance. Chroma
+samples are interleaved. The difference to ``V4L2_PIX_FMT_NV12`` is the
+memory layout. Pixels are grouped in macroblocks of 64x32 size. The
+order of macroblocks in memory is also not standard.
+
+
+Description
+===========
+
+This is the two-plane versions of the YUV 4:2:0 format where data is
+grouped into 64x32 macroblocks. The three components are separated into
+two sub-images or planes. The Y plane has one byte per pixel and pixels
+are grouped into 64x32 macroblocks. The CbCr plane has the same width,
+in bytes, as the Y plane (and the image), but is half as tall in pixels.
+The chroma plane is also grouped into 64x32 macroblocks.
+
+Width of the buffer has to be aligned to the multiple of 128, and height
+alignment is 32. Every four adjacent buffers - two horizontally and two
+vertically are grouped together and are located in memory in Z or
+flipped Z order.
+
+Layout of macroblocks in memory is presented in the following figure.
+
+
+.. _nv12mt:
+
+.. kernel-figure:: nv12mt.svg
+    :alt:    nv12mt.svg
+    :align:  center
+
+    V4L2_PIX_FMT_NV12MT macroblock Z shape memory layout
+
+The requirement that width is multiple of 128 is implemented because,
+the Z shape cannot be cut in half horizontally. In case the vertical
+resolution of macroblocks is odd then the last row of macroblocks is
+arranged in a linear order.
+
+In case of chroma the layout is identical. Cb and Cr samples are
+interleaved. Height of the buffer is aligned to 32.
+
+
+.. _nv12mt_ex:
+
+.. kernel-figure:: nv12mt_example.svg
+    :alt:    nv12mt_example.svg
+    :align:  center
+
+    Example V4L2_PIX_FMT_NV12MT memory layout of macroblocks
+
+Memory layout of macroblocks of ``V4L2_PIX_FMT_NV12MT`` format in most
+extreme case.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-nv16.rst b/Documentation/userspace-api/media/v4l/pixfmt-nv16.rst
new file mode 100644
index 000000000..22295fc0c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-nv16.rst
@@ -0,0 +1,153 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-NV16:
+.. _V4L2-PIX-FMT-NV61:
+
+******************************************************
+V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61')
+******************************************************
+
+V4L2_PIX_FMT_NV61
+Formats with ½ horizontal chroma resolution, also known as YUV 4:2:2.
+One luminance and one chrominance plane with alternating chroma samples
+as opposed to ``V4L2_PIX_FMT_YVU420``
+
+
+Description
+===========
+
+These are two-plane versions of the YUV 4:2:2 format. The three
+components are separated into two sub-images or planes. The Y plane is
+first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_NV16``, a
+combined CbCr plane immediately follows the Y plane in memory. The CbCr
+plane is the same width and height, in bytes, as the Y plane (and of the
+image). Each CbCr pair belongs to two pixels. For example,
+Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`.
+``V4L2_PIX_FMT_NV61`` is the same except the Cb and Cr bytes are
+swapped, the CrCb plane starts with a Cr byte.
+
+If the Y plane has pad bytes after each row, then the CbCr plane has as
+many pad bytes after its rows.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 16:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+    * - start + 20:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+    * - start + 24:
+      - Cb\ :sub:`20`
+      - Cr\ :sub:`20`
+      - Cb\ :sub:`21`
+      - Cr\ :sub:`21`
+    * - start + 28:
+      - Cb\ :sub:`30`
+      - Cr\ :sub:`30`
+      - Cb\ :sub:`31`
+      - Cr\ :sub:`31`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 1
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * -
+    * - 2
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 3
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-nv16m.rst b/Documentation/userspace-api/media/v4l/pixfmt-nv16m.rst
new file mode 100644
index 000000000..812bf2cca
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-nv16m.rst
@@ -0,0 +1,157 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-NV16M:
+.. _v4l2-pix-fmt-nv61m:
+
+********************************************************
+V4L2_PIX_FMT_NV16M ('NM16'), V4L2_PIX_FMT_NV61M ('NM61')
+********************************************************
+
+V4L2_PIX_FMT_NV61M
+Variation of ``V4L2_PIX_FMT_NV16`` and ``V4L2_PIX_FMT_NV61`` with planes
+non contiguous in memory.
+
+
+Description
+===========
+
+This is a multi-planar, two-plane version of the YUV 4:2:2 format. The
+three components are separated into two sub-images or planes.
+``V4L2_PIX_FMT_NV16M`` differs from ``V4L2_PIX_FMT_NV16`` in that the
+two planes are non-contiguous in memory, i.e. the chroma plane does not
+necessarily immediately follow the luma plane. The luminance data
+occupies the first plane. The Y plane has one byte per pixel. In the
+second plane there is chrominance data with alternating chroma samples.
+The CbCr plane is the same width and height, in bytes, as the Y plane.
+Each CbCr pair belongs to two pixels. For example,
+Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`.
+``V4L2_PIX_FMT_NV61M`` is the same as ``V4L2_PIX_FMT_NV16M`` except the
+Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte.
+
+``V4L2_PIX_FMT_NV16M`` and ``V4L2_PIX_FMT_NV61M`` are intended to be
+used only in drivers and applications that support the multi-planar API,
+described in :ref:`planar-apis`.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start0 + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start0 + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start0 + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start0 + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * -
+    * - start1 + 0:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`02`
+      - Cr\ :sub:`02`
+    * - start1 + 4:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`12`
+      - Cr\ :sub:`12`
+    * - start1 + 8:
+      - Cb\ :sub:`20`
+      - Cr\ :sub:`20`
+      - Cb\ :sub:`22`
+      - Cr\ :sub:`22`
+    * - start1 + 12:
+      - Cb\ :sub:`30`
+      - Cr\ :sub:`30`
+      - Cb\ :sub:`32`
+      - Cr\ :sub:`32`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 1
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * -
+    * - 2
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
+    * - 3
+      - Y
+      -
+      - Y
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      - C
+      -
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-nv24.rst b/Documentation/userspace-api/media/v4l/pixfmt-nv24.rst
new file mode 100644
index 000000000..bf1b94062
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-nv24.rst
@@ -0,0 +1,95 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-NV24:
+.. _V4L2-PIX-FMT-NV42:
+
+******************************************************
+V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42')
+******************************************************
+
+V4L2_PIX_FMT_NV42
+Formats with full horizontal and vertical chroma resolutions, also known
+as YUV 4:4:4. One luminance and one chrominance plane with alternating
+chroma samples as opposed to ``V4L2_PIX_FMT_YVU420``
+
+
+Description
+===========
+
+These are two-plane versions of the YUV 4:4:4 format. The three
+components are separated into two sub-images or planes. The Y plane is
+first, with each Y sample stored in one byte per pixel. For
+``V4L2_PIX_FMT_NV24``, a combined CbCr plane immediately follows the Y
+plane in memory. The CbCr plane has the same width and height, in
+pixels, as the Y plane (and the image). Each line contains one CbCr pair
+per pixel, with each Cb and Cr sample stored in one byte.
+``V4L2_PIX_FMT_NV42`` is the same except that the Cb and Cr samples are
+swapped, the CrCb plane starts with a Cr sample.
+
+If the Y plane has pad bytes after each row, then the CbCr plane has
+twice as many pad bytes after its rows.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 16:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+      - Cb\ :sub:`02`
+      - Cr\ :sub:`02`
+      - Cb\ :sub:`03`
+      - Cr\ :sub:`03`
+    * - start + 24:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+      - Cb\ :sub:`12`
+      - Cr\ :sub:`12`
+      - Cb\ :sub:`13`
+      - Cr\ :sub:`13`
+    * - start + 32:
+      - Cb\ :sub:`20`
+      - Cr\ :sub:`20`
+      - Cb\ :sub:`21`
+      - Cr\ :sub:`21`
+      - Cb\ :sub:`22`
+      - Cr\ :sub:`22`
+      - Cb\ :sub:`23`
+      - Cr\ :sub:`23`
+    * - start + 40:
+      - Cb\ :sub:`30`
+      - Cr\ :sub:`30`
+      - Cb\ :sub:`31`
+      - Cr\ :sub:`31`
+      - Cb\ :sub:`32`
+      - Cr\ :sub:`32`
+      - Cb\ :sub:`33`
+      - Cr\ :sub:`33`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-packed-hsv.rst b/Documentation/userspace-api/media/v4l/pixfmt-packed-hsv.rst
new file mode 100644
index 000000000..dd89860f5
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-packed-hsv.rst
@@ -0,0 +1,157 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _packed-hsv:
+
+******************
+Packed HSV formats
+******************
+
+Description
+===========
+
+The *hue* (h) is measured in degrees, the equivalence between degrees and LSBs
+depends on the hsv-encoding used, see :ref:`colorspaces`.
+The *saturation* (s) and the *value* (v) are measured in percentage of the
+cylinder: 0 being the smallest value and 255 the maximum.
+
+
+The values are packed in 24 or 32 bit formats.
+
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{2.6cm}|p{0.8cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _packed-hsv-formats:
+
+.. flat-table:: Packed HSV Image Formats
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`7` Byte 0 in memory
+      - :cspan:`7` Byte 1
+      - :cspan:`7` Byte 2
+      - :cspan:`7` Byte 3
+    * -
+      -
+      - Bit
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _V4L2-PIX-FMT-HSV32:
+
+      - ``V4L2_PIX_FMT_HSV32``
+      - 'HSV4'
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+
+      - h\ :sub:`7`
+      - h\ :sub:`6`
+      - h\ :sub:`5`
+      - h\ :sub:`4`
+      - h\ :sub:`3`
+      - h\ :sub:`2`
+      - h\ :sub:`1`
+      - h\ :sub:`0`
+
+      - s\ :sub:`7`
+      - s\ :sub:`6`
+      - s\ :sub:`5`
+      - s\ :sub:`4`
+      - s\ :sub:`3`
+      - s\ :sub:`2`
+      - s\ :sub:`1`
+      - s\ :sub:`0`
+
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _V4L2-PIX-FMT-HSV24:
+
+      - ``V4L2_PIX_FMT_HSV24``
+      - 'HSV3'
+      -
+      - h\ :sub:`7`
+      - h\ :sub:`6`
+      - h\ :sub:`5`
+      - h\ :sub:`4`
+      - h\ :sub:`3`
+      - h\ :sub:`2`
+      - h\ :sub:`1`
+      - h\ :sub:`0`
+
+      - s\ :sub:`7`
+      - s\ :sub:`6`
+      - s\ :sub:`5`
+      - s\ :sub:`4`
+      - s\ :sub:`3`
+      - s\ :sub:`2`
+      - s\ :sub:`1`
+      - s\ :sub:`0`
+
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      -
+
+.. raw:: latex
+
+    \endgroup
+
+Bit 7 is the most significant bit.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst b/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
new file mode 100644
index 000000000..84262208d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
@@ -0,0 +1,373 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _packed-yuv:
+
+******************
+Packed YUV formats
+******************
+
+Description
+===========
+
+Similar to the packed RGB formats these formats store the Y, Cb and Cr
+component of each pixel in one 16 or 32 bit word.
+
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. _packed-yuv-formats:
+
+.. tabularcolumns:: |p{2.5cm}|p{0.69cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|
+
+.. flat-table:: Packed YUV Image Formats
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+
+      - :cspan:`7` Byte 0 in memory
+
+      - :cspan:`7` Byte 1
+
+      - :cspan:`7` Byte 2
+
+      - :cspan:`7` Byte 3
+
+    * -
+      -
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+    * .. _V4L2-PIX-FMT-YUV444:
+
+      - ``V4L2_PIX_FMT_YUV444``
+      - 'Y444'
+
+      - Cb\ :sub:`3`
+      - Cb\ :sub:`2`
+      - Cb\ :sub:`1`
+      - Cb\ :sub:`0`
+      - Cr\ :sub:`3`
+      - Cr\ :sub:`2`
+      - Cr\ :sub:`1`
+      - Cr\ :sub:`0`
+
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+      - Y'\ :sub:`3`
+      - Y'\ :sub:`2`
+      - Y'\ :sub:`1`
+      - Y'\ :sub:`0`
+
+      -  :cspan:`15`
+
+    * .. _V4L2-PIX-FMT-YUV555:
+
+      - ``V4L2_PIX_FMT_YUV555``
+      - 'YUVO'
+
+      - Cb\ :sub:`2`
+      - Cb\ :sub:`1`
+      - Cb\ :sub:`0`
+      - Cr\ :sub:`4`
+      - Cr\ :sub:`3`
+      - Cr\ :sub:`2`
+      - Cr\ :sub:`1`
+      - Cr\ :sub:`0`
+
+      - a
+      - Y'\ :sub:`4`
+      - Y'\ :sub:`3`
+      - Y'\ :sub:`2`
+      - Y'\ :sub:`1`
+      - Y'\ :sub:`0`
+      - Cb\ :sub:`4`
+      - Cb\ :sub:`3`
+
+      -  :cspan:`15`
+    * .. _V4L2-PIX-FMT-YUV565:
+
+      - ``V4L2_PIX_FMT_YUV565``
+      - 'YUVP'
+
+      - Cb\ :sub:`2`
+      - Cb\ :sub:`1`
+      - Cb\ :sub:`0`
+      - Cr\ :sub:`4`
+      - Cr\ :sub:`3`
+      - Cr\ :sub:`2`
+      - Cr\ :sub:`1`
+      - Cr\ :sub:`0`
+
+      - Y'\ :sub:`4`
+      - Y'\ :sub:`3`
+      - Y'\ :sub:`2`
+      - Y'\ :sub:`1`
+      - Y'\ :sub:`0`
+      - Cb\ :sub:`5`
+      - Cb\ :sub:`4`
+      - Cb\ :sub:`3`
+
+      -  :cspan:`15`
+
+    * .. _V4L2-PIX-FMT-YUV32:
+
+      - ``V4L2_PIX_FMT_YUV32``
+      - 'YUV4'
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+
+      - Y'\ :sub:`7`
+      - Y'\ :sub:`6`
+      - Y'\ :sub:`5`
+      - Y'\ :sub:`4`
+      - Y'\ :sub:`3`
+      - Y'\ :sub:`2`
+      - Y'\ :sub:`1`
+      - Y'\ :sub:`0`
+
+      - Cb\ :sub:`7`
+      - Cb\ :sub:`6`
+      - Cb\ :sub:`5`
+      - Cb\ :sub:`4`
+      - Cb\ :sub:`3`
+      - Cb\ :sub:`2`
+      - Cb\ :sub:`1`
+      - Cb\ :sub:`0`
+
+      - Cr\ :sub:`7`
+      - Cr\ :sub:`6`
+      - Cr\ :sub:`5`
+      - Cr\ :sub:`4`
+      - Cr\ :sub:`3`
+      - Cr\ :sub:`2`
+      - Cr\ :sub:`1`
+      - Cr\ :sub:`0`
+
+    * .. _V4L2-PIX-FMT-AYUV32:
+
+      - ``V4L2_PIX_FMT_AYUV32``
+      - 'AYUV'
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+
+      - Y'\ :sub:`7`
+      - Y'\ :sub:`6`
+      - Y'\ :sub:`5`
+      - Y'\ :sub:`4`
+      - Y'\ :sub:`3`
+      - Y'\ :sub:`2`
+      - Y'\ :sub:`1`
+      - Y'\ :sub:`0`
+
+      - Cb\ :sub:`7`
+      - Cb\ :sub:`6`
+      - Cb\ :sub:`5`
+      - Cb\ :sub:`4`
+      - Cb\ :sub:`3`
+      - Cb\ :sub:`2`
+      - Cb\ :sub:`1`
+      - Cb\ :sub:`0`
+
+      - Cr\ :sub:`7`
+      - Cr\ :sub:`6`
+      - Cr\ :sub:`5`
+      - Cr\ :sub:`4`
+      - Cr\ :sub:`3`
+      - Cr\ :sub:`2`
+      - Cr\ :sub:`1`
+      - Cr\ :sub:`0`
+
+    * .. _V4L2-PIX-FMT-XYUV32:
+
+      - ``V4L2_PIX_FMT_XYUV32``
+      - 'XYUV'
+
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+
+      - Y'\ :sub:`7`
+      - Y'\ :sub:`6`
+      - Y'\ :sub:`5`
+      - Y'\ :sub:`4`
+      - Y'\ :sub:`3`
+      - Y'\ :sub:`2`
+      - Y'\ :sub:`1`
+      - Y'\ :sub:`0`
+
+      - Cb\ :sub:`7`
+      - Cb\ :sub:`6`
+      - Cb\ :sub:`5`
+      - Cb\ :sub:`4`
+      - Cb\ :sub:`3`
+      - Cb\ :sub:`2`
+      - Cb\ :sub:`1`
+      - Cb\ :sub:`0`
+
+      - Cr\ :sub:`7`
+      - Cr\ :sub:`6`
+      - Cr\ :sub:`5`
+      - Cr\ :sub:`4`
+      - Cr\ :sub:`3`
+      - Cr\ :sub:`2`
+      - Cr\ :sub:`1`
+      - Cr\ :sub:`0`
+
+    * .. _V4L2-PIX-FMT-VUYA32:
+
+      - ``V4L2_PIX_FMT_VUYA32``
+      - 'VUYA'
+
+      - Cr\ :sub:`7`
+      - Cr\ :sub:`6`
+      - Cr\ :sub:`5`
+      - Cr\ :sub:`4`
+      - Cr\ :sub:`3`
+      - Cr\ :sub:`2`
+      - Cr\ :sub:`1`
+      - Cr\ :sub:`0`
+
+      - Cb\ :sub:`7`
+      - Cb\ :sub:`6`
+      - Cb\ :sub:`5`
+      - Cb\ :sub:`4`
+      - Cb\ :sub:`3`
+      - Cb\ :sub:`2`
+      - Cb\ :sub:`1`
+      - Cb\ :sub:`0`
+
+      - Y'\ :sub:`7`
+      - Y'\ :sub:`6`
+      - Y'\ :sub:`5`
+      - Y'\ :sub:`4`
+      - Y'\ :sub:`3`
+      - Y'\ :sub:`2`
+      - Y'\ :sub:`1`
+      - Y'\ :sub:`0`
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+
+    * .. _V4L2-PIX-FMT-VUYX32:
+
+      - ``V4L2_PIX_FMT_VUYX32``
+      - 'VUYX'
+
+      - Cr\ :sub:`7`
+      - Cr\ :sub:`6`
+      - Cr\ :sub:`5`
+      - Cr\ :sub:`4`
+      - Cr\ :sub:`3`
+      - Cr\ :sub:`2`
+      - Cr\ :sub:`1`
+      - Cr\ :sub:`0`
+
+      - Cb\ :sub:`7`
+      - Cb\ :sub:`6`
+      - Cb\ :sub:`5`
+      - Cb\ :sub:`4`
+      - Cb\ :sub:`3`
+      - Cb\ :sub:`2`
+      - Cb\ :sub:`1`
+      - Cb\ :sub:`0`
+
+      - Y'\ :sub:`7`
+      - Y'\ :sub:`6`
+      - Y'\ :sub:`5`
+      - Y'\ :sub:`4`
+      - Y'\ :sub:`3`
+      - Y'\ :sub:`2`
+      - Y'\ :sub:`1`
+      - Y'\ :sub:`0`
+
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+
+.. raw:: latex
+
+    \endgroup
+
+.. note::
+
+    #) Bit 7 is the most significant bit;
+
+    #) The value of a = alpha bits is undefined when reading from the driver,
+       ignored when writing to the driver, except when alpha blending has
+       been negotiated for a :ref:`Video Overlay <overlay>` or
+       :ref:`Video Output Overlay <osd>` for the formats Y444, YUV555 and
+       YUV4. However, for formats AYUV32 and VUYA32, the alpha component is
+       expected to contain a meaningful value that can be used by drivers
+       and applications. And, the formats XYUV32 and VUYX32 contain undefined
+       alpha values that must be ignored by all applications and drivers.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
new file mode 100644
index 000000000..c9231e188
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
@@ -0,0 +1,258 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _pixfmt-reserved:
+
+***************************
+Reserved Format Identifiers
+***************************
+
+These formats are not defined by this specification, they are just
+listed for reference and to avoid naming conflicts. If you want to
+register your own format, send an e-mail to the linux-media mailing list
+`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__
+for inclusion in the ``videodev2.h`` file. If you want to share your
+format with other developers add a link to your documentation and send a
+copy to the linux-media mailing list for inclusion in this section. If
+you think your format should be listed in a standard format section
+please make a proposal on the linux-media mailing list.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _reserved-formats:
+
+.. flat-table:: Reserved Image Formats
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - Identifier
+      - Code
+      - Details
+    * .. _V4L2-PIX-FMT-DV:
+
+      - ``V4L2_PIX_FMT_DV``
+      - 'dvsd'
+      - unknown
+    * .. _V4L2-PIX-FMT-ET61X251:
+
+      - ``V4L2_PIX_FMT_ET61X251``
+      - 'E625'
+      - Compressed format of the ET61X251 driver.
+    * .. _V4L2-PIX-FMT-HI240:
+
+      - ``V4L2_PIX_FMT_HI240``
+      - 'HI24'
+      - 8 bit RGB format used by the BTTV driver.
+    * .. _V4L2-PIX-FMT-HM12:
+
+      - ``V4L2_PIX_FMT_HM12``
+      - 'HM12'
+      - YUV 4:2:0 format used by the IVTV driver.
+
+	The format is documented in the kernel sources in the file
+	``Documentation/userspace-api/media/drivers/cx2341x-uapi.rst``
+    * .. _V4L2-PIX-FMT-CPIA1:
+
+      - ``V4L2_PIX_FMT_CPIA1``
+      - 'CPIA'
+      - YUV format used by the gspca cpia1 driver.
+    * .. _V4L2-PIX-FMT-JPGL:
+
+      - ``V4L2_PIX_FMT_JPGL``
+      - 'JPGL'
+      - JPEG-Light format (Pegasus Lossless JPEG) used in Divio webcams NW
+	80x.
+    * .. _V4L2-PIX-FMT-SPCA501:
+
+      - ``V4L2_PIX_FMT_SPCA501``
+      - 'S501'
+      - YUYV per line used by the gspca driver.
+    * .. _V4L2-PIX-FMT-SPCA505:
+
+      - ``V4L2_PIX_FMT_SPCA505``
+      - 'S505'
+      - YYUV per line used by the gspca driver.
+    * .. _V4L2-PIX-FMT-SPCA508:
+
+      - ``V4L2_PIX_FMT_SPCA508``
+      - 'S508'
+      - YUVY per line used by the gspca driver.
+    * .. _V4L2-PIX-FMT-SPCA561:
+
+      - ``V4L2_PIX_FMT_SPCA561``
+      - 'S561'
+      - Compressed GBRG Bayer format used by the gspca driver.
+    * .. _V4L2-PIX-FMT-PAC207:
+
+      - ``V4L2_PIX_FMT_PAC207``
+      - 'P207'
+      - Compressed BGGR Bayer format used by the gspca driver.
+    * .. _V4L2-PIX-FMT-MR97310A:
+
+      - ``V4L2_PIX_FMT_MR97310A``
+      - 'M310'
+      - Compressed BGGR Bayer format used by the gspca driver.
+    * .. _V4L2-PIX-FMT-JL2005BCD:
+
+      - ``V4L2_PIX_FMT_JL2005BCD``
+      - 'JL20'
+      - JPEG compressed RGGB Bayer format used by the gspca driver.
+    * .. _V4L2-PIX-FMT-OV511:
+
+      - ``V4L2_PIX_FMT_OV511``
+      - 'O511'
+      - OV511 JPEG format used by the gspca driver.
+    * .. _V4L2-PIX-FMT-OV518:
+
+      - ``V4L2_PIX_FMT_OV518``
+      - 'O518'
+      - OV518 JPEG format used by the gspca driver.
+    * .. _V4L2-PIX-FMT-PJPG:
+
+      - ``V4L2_PIX_FMT_PJPG``
+      - 'PJPG'
+      - Pixart 73xx JPEG format used by the gspca driver.
+    * .. _V4L2-PIX-FMT-SE401:
+
+      - ``V4L2_PIX_FMT_SE401``
+      - 'S401'
+      - Compressed RGB format used by the gspca se401 driver
+    * .. _V4L2-PIX-FMT-SQ905C:
+
+      - ``V4L2_PIX_FMT_SQ905C``
+      - '905C'
+      - Compressed RGGB bayer format used by the gspca driver.
+    * .. _V4L2-PIX-FMT-MJPEG:
+
+      - ``V4L2_PIX_FMT_MJPEG``
+      - 'MJPG'
+      - Compressed format used by the Zoran driver
+    * .. _V4L2-PIX-FMT-PWC1:
+
+      - ``V4L2_PIX_FMT_PWC1``
+      - 'PWC1'
+      - Compressed format of the PWC driver.
+    * .. _V4L2-PIX-FMT-PWC2:
+
+      - ``V4L2_PIX_FMT_PWC2``
+      - 'PWC2'
+      - Compressed format of the PWC driver.
+    * .. _V4L2-PIX-FMT-SN9C10X:
+
+      - ``V4L2_PIX_FMT_SN9C10X``
+      - 'S910'
+      - Compressed format of the SN9C102 driver.
+    * .. _V4L2-PIX-FMT-SN9C20X-I420:
+
+      - ``V4L2_PIX_FMT_SN9C20X_I420``
+      - 'S920'
+      - YUV 4:2:0 format of the gspca sn9c20x driver.
+    * .. _V4L2-PIX-FMT-SN9C2028:
+
+      - ``V4L2_PIX_FMT_SN9C2028``
+      - 'SONX'
+      - Compressed GBRG bayer format of the gspca sn9c2028 driver.
+    * .. _V4L2-PIX-FMT-STV0680:
+
+      - ``V4L2_PIX_FMT_STV0680``
+      - 'S680'
+      - Bayer format of the gspca stv0680 driver.
+    * .. _V4L2-PIX-FMT-WNVA:
+
+      - ``V4L2_PIX_FMT_WNVA``
+      - 'WNVA'
+      - Used by the Winnov Videum driver,
+	`http://www.thedirks.org/winnov/ <http://www.thedirks.org/winnov/>`__
+    * .. _V4L2-PIX-FMT-TM6000:
+
+      - ``V4L2_PIX_FMT_TM6000``
+      - 'TM60'
+      - Used by Trident tm6000
+    * .. _V4L2-PIX-FMT-CIT-YYVYUY:
+
+      - ``V4L2_PIX_FMT_CIT_YYVYUY``
+      - 'CITV'
+      - Used by xirlink CIT, found at IBM webcams.
+
+	Uses one line of Y then 1 line of VYUY
+    * .. _V4L2-PIX-FMT-KONICA420:
+
+      - ``V4L2_PIX_FMT_KONICA420``
+      - 'KONI'
+      - Used by Konica webcams.
+
+	YUV420 planar in blocks of 256 pixels.
+    * .. _V4L2-PIX-FMT-YYUV:
+
+      - ``V4L2_PIX_FMT_YYUV``
+      - 'YYUV'
+      - unknown
+    * .. _V4L2-PIX-FMT-Y4:
+
+      - ``V4L2_PIX_FMT_Y4``
+      - 'Y04 '
+      - Old 4-bit greyscale format. Only the most significant 4 bits of
+	each byte are used, the other bits are set to 0.
+    * .. _V4L2-PIX-FMT-Y6:
+
+      - ``V4L2_PIX_FMT_Y6``
+      - 'Y06 '
+      - Old 6-bit greyscale format. Only the most significant 6 bits of
+	each byte are used, the other bits are set to 0.
+    * .. _V4L2-PIX-FMT-S5C-UYVY-JPG:
+
+      - ``V4L2_PIX_FMT_S5C_UYVY_JPG``
+      - 'S5CI'
+      - Two-planar format used by Samsung S5C73MX cameras. The first plane
+	contains interleaved JPEG and UYVY image data, followed by meta
+	data in form of an array of offsets to the UYVY data blocks. The
+	actual pointer array follows immediately the interleaved JPEG/UYVY
+	data, the number of entries in this array equals the height of the
+	UYVY image. Each entry is a 4-byte unsigned integer in big endian
+	order and it's an offset to a single pixel line of the UYVY image.
+	The first plane can start either with JPEG or UYVY data chunk. The
+	size of a single UYVY block equals the UYVY image's width
+	multiplied by 2. The size of a JPEG chunk depends on the image and
+	can vary with each line.
+
+	The second plane, at an offset of 4084 bytes, contains a 4-byte
+	offset to the pointer array in the first plane. This offset is
+	followed by a 4-byte value indicating size of the pointer array.
+	All numbers in the second plane are also in big endian order.
+	Remaining data in the second plane is undefined. The information
+	in the second plane allows to easily find location of the pointer
+	array, which can be different for each frame. The size of the
+	pointer array is constant for given UYVY image height.
+
+	In order to extract UYVY and JPEG frames an application can
+	initially set a data pointer to the start of first plane and then
+	add an offset from the first entry of the pointers table. Such a
+	pointer indicates start of an UYVY image pixel line. Whole UYVY
+	line can be copied to a separate buffer. These steps should be
+	repeated for each line, i.e. the number of entries in the pointer
+	array. Anything what's in between the UYVY lines is JPEG data and
+	should be concatenated to form the JPEG stream.
+    * .. _V4L2-PIX-FMT-MT21C:
+
+      - ``V4L2_PIX_FMT_MT21C``
+      - 'MT21'
+      - Compressed two-planar YVU420 format used by Mediatek MT8173.
+	The compression is lossless.
+	It is an opaque intermediate format and the MDP hardware must be
+	used to convert ``V4L2_PIX_FMT_MT21C`` to ``V4L2_PIX_FMT_NV12M``,
+	``V4L2_PIX_FMT_YUV420M`` or ``V4L2_PIX_FMT_YVU420``.
+    * .. _V4L2-PIX-FMT-SUNXI-TILED-NV12:
+
+      - ``V4L2_PIX_FMT_SUNXI_TILED_NV12``
+      - 'ST12'
+      - Two-planar NV12-based format used by the video engine found on Allwinner
+	(codenamed sunxi) platforms, with 32x32 tiles for the luminance plane
+	and 32x64 tiles for the chrominance plane. The data in each tile is
+	stored in linear order, within the tile bounds. Each tile follows the
+	previous one linearly in memory (from left to right, top to bottom).
+
+	The associated buffer dimensions are aligned to match an integer number
+	of tiles, resulting in 32-aligned resolutions for the luminance plane
+	and 16-aligned resolutions for the chrominance plane (with 2x2
+	subsampling).
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-rgb.rst b/Documentation/userspace-api/media/v4l/pixfmt-rgb.rst
new file mode 100644
index 000000000..9d827097c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-rgb.rst
@@ -0,0 +1,1297 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _pixfmt-rgb:
+
+***********
+RGB Formats
+***********
+
+Description
+===========
+
+These formats are designed to match the pixel formats of typical PC
+graphics frame buffers. They occupy 8, 16, 24 or 32 bits per pixel.
+These are all packed-pixel formats, meaning all the data for a pixel lie
+next to each other in memory.
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{2.8cm}|p{2.0cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+
+.. flat-table:: RGB Image Formats
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      - :cspan:`7` Byte 0 in memory
+      - :cspan:`7` Byte 1
+      - :cspan:`7` Byte 2
+      - :cspan:`7` Byte 3
+    * -
+      -
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _V4L2-PIX-FMT-RGB332:
+
+      - ``V4L2_PIX_FMT_RGB332``
+      - 'RGB1'
+
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-ARGB444:
+
+      - ``V4L2_PIX_FMT_ARGB444``
+      - 'AR12'
+
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-XRGB444:
+
+      - ``V4L2_PIX_FMT_XRGB444``
+      - 'XR12'
+
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-RGBA444:
+
+      - ``V4L2_PIX_FMT_RGBA444``
+      - 'RA12'
+
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-RGBX444:
+
+      - ``V4L2_PIX_FMT_RGBX444``
+      - 'RX12'
+
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-ABGR444:
+
+      - ``V4L2_PIX_FMT_ABGR444``
+      - 'AB12'
+
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-XBGR444:
+
+      - ``V4L2_PIX_FMT_XBGR444``
+      - 'XB12'
+
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-BGRA444:
+
+      - ``V4L2_PIX_FMT_BGRA444``
+      - 'BA12'
+
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-BGRX444:
+
+      - ``V4L2_PIX_FMT_BGRX444``
+      - 'BX12'
+
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-ARGB555:
+
+      - ``V4L2_PIX_FMT_ARGB555``
+      - 'AR15'
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - a
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      -
+    * .. _V4L2-PIX-FMT-XRGB555:
+
+      - ``V4L2_PIX_FMT_XRGB555``
+      - 'XR15'
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - `-`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      -
+    * .. _V4L2-PIX-FMT-RGBA555:
+
+      - ``V4L2_PIX_FMT_RGBA555``
+      - 'RA15'
+
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - a
+
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      -
+    * .. _V4L2-PIX-FMT-RGBX555:
+
+      - ``V4L2_PIX_FMT_RGBX555``
+      - 'RX15'
+
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - `-`
+
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      -
+    * .. _V4L2-PIX-FMT-ABGR555:
+
+      - ``V4L2_PIX_FMT_ABGR555``
+      - 'AB15'
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - a
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      -
+    * .. _V4L2-PIX-FMT-XBGR555:
+
+      - ``V4L2_PIX_FMT_XBGR555``
+      - 'XB15'
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - `-`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      -
+    * .. _V4L2-PIX-FMT-BGRA555:
+
+      - ``V4L2_PIX_FMT_BGRA555``
+      - 'BA15'
+
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - a
+
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      -
+    * .. _V4L2-PIX-FMT-BGRX555:
+
+      - ``V4L2_PIX_FMT_BGRX555``
+      - 'BX15'
+
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - `-`
+
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      -
+    * .. _V4L2-PIX-FMT-RGB565:
+
+      - ``V4L2_PIX_FMT_RGB565``
+      - 'RGBP'
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      -
+    * .. _V4L2-PIX-FMT-ARGB555X:
+
+      - ``V4L2_PIX_FMT_ARGB555X``
+      - 'AR15' | (1 << 31)
+
+      - a
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-XRGB555X:
+
+      - ``V4L2_PIX_FMT_XRGB555X``
+      - 'XR15' | (1 << 31)
+
+      - `-`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-RGB565X:
+
+      - ``V4L2_PIX_FMT_RGB565X``
+      - 'RGBR'
+
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-BGR24:
+
+      - ``V4L2_PIX_FMT_BGR24``
+      - 'BGR3'
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-RGB24:
+
+      - ``V4L2_PIX_FMT_RGB24``
+      - 'RGB3'
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-BGR666:
+
+      - ``V4L2_PIX_FMT_BGR666``
+      - 'BGRH'
+
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+    * .. _V4L2-PIX-FMT-ABGR32:
+
+      - ``V4L2_PIX_FMT_ABGR32``
+      - 'AR24'
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+    * .. _V4L2-PIX-FMT-XBGR32:
+
+      - ``V4L2_PIX_FMT_XBGR32``
+      - 'XR24'
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+    * .. _V4L2-PIX-FMT-BGRA32:
+
+      - ``V4L2_PIX_FMT_BGRA32``
+      - 'RA24'
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _V4L2-PIX-FMT-BGRX32:
+
+      - ``V4L2_PIX_FMT_BGRX32``
+      - 'RX24'
+
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _V4L2-PIX-FMT-RGBA32:
+
+      - ``V4L2_PIX_FMT_RGBA32``
+      - 'AB24'
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+    * .. _V4L2-PIX-FMT-RGBX32:
+
+      - ``V4L2_PIX_FMT_RGBX32``
+      - 'XB24'
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+    * .. _V4L2-PIX-FMT-ARGB32:
+
+      - ``V4L2_PIX_FMT_ARGB32``
+      - 'BA24'
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _V4L2-PIX-FMT-XRGB32:
+
+      - ``V4L2_PIX_FMT_XRGB32``
+      - 'BX24'
+
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+      - `-`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+.. raw:: latex
+
+    \endgroup
+
+.. note:: Bit 7 is the most significant bit.
+
+The usage and value of the alpha bits (a) in the ARGB and ABGR formats
+(collectively referred to as alpha formats) depend on the device type
+and hardware operation. :ref:`Capture <capture>` devices (including
+capture queues of mem-to-mem devices) fill the alpha component in
+memory. When the device outputs an alpha channel the alpha component
+will have a meaningful value. Otherwise, when the device doesn't output
+an alpha channel but can set the alpha bit to a user-configurable value,
+the :ref:`V4L2_CID_ALPHA_COMPONENT <v4l2-alpha-component>` control
+is used to specify that alpha value, and the alpha component of all
+pixels will be set to the value specified by that control. Otherwise a
+corresponding format without an alpha component (XRGB or XBGR) must be
+used instead of an alpha format.
+
+:ref:`Output <output>` devices (including output queues of mem-to-mem
+devices and :ref:`video output overlay <osd>` devices) read the alpha
+component from memory. When the device processes the alpha channel the
+alpha component must be filled with meaningful values by applications.
+Otherwise a corresponding format without an alpha component (XRGB or
+XBGR) must be used instead of an alpha format.
+
+The XRGB and XBGR formats contain undefined bits (-). Applications,
+devices and drivers must ignore those bits, for both
+:ref:`capture` and :ref:`output` devices.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{3.1cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|
+
+.. flat-table:: RGB byte order
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       11 3 3 3 3 3 3 3 3 3 3 3 3
+
+    * - start + 0:
+      - B\ :sub:`00`
+      - G\ :sub:`00`
+      - R\ :sub:`00`
+      - B\ :sub:`01`
+      - G\ :sub:`01`
+      - R\ :sub:`01`
+      - B\ :sub:`02`
+      - G\ :sub:`02`
+      - R\ :sub:`02`
+      - B\ :sub:`03`
+      - G\ :sub:`03`
+      - R\ :sub:`03`
+    * - start + 12:
+      - B\ :sub:`10`
+      - G\ :sub:`10`
+      - R\ :sub:`10`
+      - B\ :sub:`11`
+      - G\ :sub:`11`
+      - R\ :sub:`11`
+      - B\ :sub:`12`
+      - G\ :sub:`12`
+      - R\ :sub:`12`
+      - B\ :sub:`13`
+      - G\ :sub:`13`
+      - R\ :sub:`13`
+    * - start + 24:
+      - B\ :sub:`20`
+      - G\ :sub:`20`
+      - R\ :sub:`20`
+      - B\ :sub:`21`
+      - G\ :sub:`21`
+      - R\ :sub:`21`
+      - B\ :sub:`22`
+      - G\ :sub:`22`
+      - R\ :sub:`22`
+      - B\ :sub:`23`
+      - G\ :sub:`23`
+      - R\ :sub:`23`
+    * - start + 36:
+      - B\ :sub:`30`
+      - G\ :sub:`30`
+      - R\ :sub:`30`
+      - B\ :sub:`31`
+      - G\ :sub:`31`
+      - R\ :sub:`31`
+      - B\ :sub:`32`
+      - G\ :sub:`32`
+      - R\ :sub:`32`
+      - B\ :sub:`33`
+      - G\ :sub:`33`
+      - R\ :sub:`33`
+
+.. raw:: latex
+
+    \normalsize
+
+Formats defined in :ref:`pixfmt-rgb-deprecated` are deprecated and
+must not be used by new drivers. They are documented here for reference.
+The meaning of their alpha bits ``(a)`` are ill-defined and interpreted as in
+either the corresponding ARGB or XRGB format, depending on the driver.
+
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{2.6cm}|p{0.70cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _pixfmt-rgb-deprecated:
+
+.. flat-table:: Deprecated Packed RGB Image Formats
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      - :cspan:`7` Byte 0 in memory
+
+      - :cspan:`7` Byte 1
+
+      - :cspan:`7` Byte 2
+
+      - :cspan:`7` Byte 3
+    * -
+      -
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _V4L2-PIX-FMT-RGB444:
+
+      - ``V4L2_PIX_FMT_RGB444``
+      - 'R444'
+
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-RGB555:
+
+      - ``V4L2_PIX_FMT_RGB555``
+      - 'RGBO'
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - a
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      -
+    * .. _V4L2-PIX-FMT-RGB555X:
+
+      - ``V4L2_PIX_FMT_RGB555X``
+      - 'RGBQ'
+
+      - a
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      -
+    * .. _V4L2-PIX-FMT-BGR32:
+
+      - ``V4L2_PIX_FMT_BGR32``
+      - 'BGR4'
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+    * .. _V4L2-PIX-FMT-RGB32:
+
+      - ``V4L2_PIX_FMT_RGB32``
+      - 'RGB4'
+
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+.. raw:: latex
+
+    \endgroup
+
+A test utility to determine which RGB formats a driver actually supports
+is available from the LinuxTV v4l-dvb repository. See
+`https://linuxtv.org/repo/ <https://linuxtv.org/repo/>`__ for access
+instructions.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-sdr-cs08.rst b/Documentation/userspace-api/media/v4l/pixfmt-sdr-cs08.rst
new file mode 100644
index 000000000..bd6ee6111
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-sdr-cs08.rst
@@ -0,0 +1,30 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-sdr-fmt-cs8:
+
+*************************
+V4L2_SDR_FMT_CS8 ('CS08')
+*************************
+
+Complex signed 8-bit IQ sample
+
+
+Description
+===========
+
+This format contains sequence of complex number samples. Each complex
+number consist two parts, called In-phase and Quadrature (IQ). Both I
+and Q are represented as a 8 bit signed number. I value comes first and
+Q value after that.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - I'\ :sub:`0`
+    * - start + 1:
+      - Q'\ :sub:`0`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-sdr-cs14le.rst b/Documentation/userspace-api/media/v4l/pixfmt-sdr-cs14le.rst
new file mode 100644
index 000000000..ea21b288d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-sdr-cs14le.rst
@@ -0,0 +1,34 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-SDR-FMT-CS14LE:
+
+****************************
+V4L2_SDR_FMT_CS14LE ('CS14')
+****************************
+
+Complex signed 14-bit little endian IQ sample
+
+
+Description
+===========
+
+This format contains sequence of complex number samples. Each complex
+number consist two parts, called In-phase and Quadrature (IQ). Both I
+and Q are represented as a 14 bit signed little endian number. I value
+comes first and Q value after that. 14 bit value is stored in 16 bit
+space with unused high bits padded with 0.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - I'\ :sub:`0[7:0]`
+      - I'\ :sub:`0[13:8]`
+    * - start + 2:
+      - Q'\ :sub:`0[7:0]`
+      - Q'\ :sub:`0[13:8]`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-sdr-cu08.rst b/Documentation/userspace-api/media/v4l/pixfmt-sdr-cu08.rst
new file mode 100644
index 000000000..45fce09d8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-sdr-cu08.rst
@@ -0,0 +1,30 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-sdr-fmt-cu8:
+
+*************************
+V4L2_SDR_FMT_CU8 ('CU08')
+*************************
+
+Complex unsigned 8-bit IQ sample
+
+
+Description
+===========
+
+This format contains sequence of complex number samples. Each complex
+number consist two parts, called In-phase and Quadrature (IQ). Both I
+and Q are represented as a 8 bit unsigned number. I value comes first
+and Q value after that.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - I'\ :sub:`0`
+    * - start + 1:
+      - Q'\ :sub:`0`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-sdr-cu16le.rst b/Documentation/userspace-api/media/v4l/pixfmt-sdr-cu16le.rst
new file mode 100644
index 000000000..7f4242f8d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-sdr-cu16le.rst
@@ -0,0 +1,34 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-SDR-FMT-CU16LE:
+
+****************************
+V4L2_SDR_FMT_CU16LE ('CU16')
+****************************
+
+
+Complex unsigned 16-bit little endian IQ sample
+
+
+Description
+===========
+
+This format contains sequence of complex number samples. Each complex
+number consist two parts, called In-phase and Quadrature (IQ). Both I
+and Q are represented as a 16 bit unsigned little endian number. I value
+comes first and Q value after that.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - I'\ :sub:`0[7:0]`
+      - I'\ :sub:`0[15:8]`
+    * - start + 2:
+      - Q'\ :sub:`0[7:0]`
+      - Q'\ :sub:`0[15:8]`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu16be.rst b/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu16be.rst
new file mode 100644
index 000000000..a4d4b70ec
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu16be.rst
@@ -0,0 +1,55 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-SDR-FMT-PCU16BE:
+
+******************************
+V4L2_SDR_FMT_PCU16BE ('PC16')
+******************************
+
+Planar complex unsigned 16-bit big endian IQ sample
+
+Description
+===========
+
+This format contains a sequence of complex number samples. Each complex
+number consist of two parts called In-phase and Quadrature (IQ). Both I
+and Q are represented as a 16 bit unsigned big endian number stored in
+32 bit space. The remaining unused bits within the 32 bit space will be
+padded with 0. I value starts first and Q value starts at an offset
+equalling half of the buffer size (i.e.) offset = buffersize/2. Out of
+the 16 bits, bit 15:2 (14 bit) is data and bit 1:0 (2 bit) can be any
+value.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * -  Offset:
+      -  Byte B0
+      -  Byte B1
+      -  Byte B2
+      -  Byte B3
+    * -  start + 0:
+      -  I'\ :sub:`0[13:6]`
+      -  I'\ :sub:`0[5:0]; B1[1:0]=pad`
+      -  pad
+      -  pad
+    * -  start + 4:
+      -  I'\ :sub:`1[13:6]`
+      -  I'\ :sub:`1[5:0]; B1[1:0]=pad`
+      -  pad
+      -  pad
+    * -  ...
+    * - start + offset:
+      -  Q'\ :sub:`0[13:6]`
+      -  Q'\ :sub:`0[5:0]; B1[1:0]=pad`
+      -  pad
+      -  pad
+    * - start + offset + 4:
+      -  Q'\ :sub:`1[13:6]`
+      -  Q'\ :sub:`1[5:0]; B1[1:0]=pad`
+      -  pad
+      -  pad
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu18be.rst b/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu18be.rst
new file mode 100644
index 000000000..3db690bd6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu18be.rst
@@ -0,0 +1,55 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-SDR-FMT-PCU18BE:
+
+******************************
+V4L2_SDR_FMT_PCU18BE ('PC18')
+******************************
+
+Planar complex unsigned 18-bit big endian IQ sample
+
+Description
+===========
+
+This format contains a sequence of complex number samples. Each complex
+number consist of two parts called In-phase and Quadrature (IQ). Both I
+and Q are represented as a 18 bit unsigned big endian number stored in
+32 bit space. The remaining unused bits within the 32 bit space will be
+padded with 0. I value starts first and Q value starts at an offset
+equalling half of the buffer size (i.e.) offset = buffersize/2. Out of
+the 18 bits, bit 17:2 (16 bit) is data and bit 1:0 (2 bit) can be any
+value.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * -  Offset:
+      -  Byte B0
+      -  Byte B1
+      -  Byte B2
+      -  Byte B3
+    * -  start + 0:
+      -  I'\ :sub:`0[17:10]`
+      -  I'\ :sub:`0[9:2]`
+      -  I'\ :sub:`0[1:0]; B2[5:0]=pad`
+      -  pad
+    * -  start + 4:
+      -  I'\ :sub:`1[17:10]`
+      -  I'\ :sub:`1[9:2]`
+      -  I'\ :sub:`1[1:0]; B2[5:0]=pad`
+      -  pad
+    * -  ...
+    * - start + offset:
+      -  Q'\ :sub:`0[17:10]`
+      -  Q'\ :sub:`0[9:2]`
+      -  Q'\ :sub:`0[1:0]; B2[5:0]=pad`
+      -  pad
+    * - start + offset + 4:
+      -  Q'\ :sub:`1[17:10]`
+      -  Q'\ :sub:`1[9:2]`
+      -  Q'\ :sub:`1[1:0]; B2[5:0]=pad`
+      -  pad
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu20be.rst b/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu20be.rst
new file mode 100644
index 000000000..485343cdf
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu20be.rst
@@ -0,0 +1,55 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-SDR-FMT-PCU20BE:
+
+******************************
+V4L2_SDR_FMT_PCU20BE ('PC20')
+******************************
+
+Planar complex unsigned 20-bit big endian IQ sample
+
+Description
+===========
+
+This format contains a sequence of complex number samples. Each complex
+number consist of two parts called In-phase and Quadrature (IQ). Both I
+and Q are represented as a 20 bit unsigned big endian number stored in
+32 bit space. The remaining unused bits within the 32 bit space will be
+padded with 0. I value starts first and Q value starts at an offset
+equalling half of the buffer size (i.e.) offset = buffersize/2. Out of
+the 20 bits, bit 19:2 (18 bit) is data and bit 1:0 (2 bit) can be any
+value.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  1
+    :stub-columns: 0
+
+    * -  Offset:
+      -  Byte B0
+      -  Byte B1
+      -  Byte B2
+      -  Byte B3
+    * -  start + 0:
+      -  I'\ :sub:`0[19:12]`
+      -  I'\ :sub:`0[11:4]`
+      -  I'\ :sub:`0[3:0]; B2[3:0]=pad`
+      -  pad
+    * -  start + 4:
+      -  I'\ :sub:`1[19:12]`
+      -  I'\ :sub:`1[11:4]`
+      -  I'\ :sub:`1[3:0]; B2[3:0]=pad`
+      -  pad
+    * -  ...
+    * - start + offset:
+      -  Q'\ :sub:`0[19:12]`
+      -  Q'\ :sub:`0[11:4]`
+      -  Q'\ :sub:`0[3:0]; B2[3:0]=pad`
+      -  pad
+    * - start + offset + 4:
+      -  Q'\ :sub:`1[19:12]`
+      -  Q'\ :sub:`1[11:4]`
+      -  Q'\ :sub:`1[3:0]; B2[3:0]=pad`
+      -  pad
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-sdr-ru12le.rst b/Documentation/userspace-api/media/v4l/pixfmt-sdr-ru12le.rst
new file mode 100644
index 000000000..2ad4706bf
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-sdr-ru12le.rst
@@ -0,0 +1,32 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-SDR-FMT-RU12LE:
+
+****************************
+V4L2_SDR_FMT_RU12LE ('RU12')
+****************************
+
+
+Real unsigned 12-bit little endian sample
+
+
+Description
+===========
+
+This format contains sequence of real number samples. Each sample is
+represented as a 12 bit unsigned little endian number. Sample is stored
+in 16 bit space with unused high bits padded with 0.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - I'\ :sub:`0[7:0]`
+      - I'\ :sub:`0[11:8]`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb10-ipu3.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb10-ipu3.rst
new file mode 100644
index 000000000..15f1900cd
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb10-ipu3.rst
@@ -0,0 +1,335 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-pix-fmt-ipu3-sbggr10:
+.. _v4l2-pix-fmt-ipu3-sgbrg10:
+.. _v4l2-pix-fmt-ipu3-sgrbg10:
+.. _v4l2-pix-fmt-ipu3-srggb10:
+
+**********************************************************************************************************************************************
+V4L2_PIX_FMT_IPU3_SBGGR10 ('ip3b'), V4L2_PIX_FMT_IPU3_SGBRG10 ('ip3g'), V4L2_PIX_FMT_IPU3_SGRBG10 ('ip3G'), V4L2_PIX_FMT_IPU3_SRGGB10 ('ip3r')
+**********************************************************************************************************************************************
+
+10-bit Bayer formats
+
+Description
+===========
+
+These four pixel formats are used by Intel IPU3 driver, they are raw
+sRGB / Bayer formats with 10 bits per sample with every 25 pixels packed
+to 32 bytes leaving 6 most significant bits padding in the last byte.
+The format is little endian.
+
+In other respects this format is similar to :ref:`V4L2-PIX-FMT-SRGGB10`.
+Below is an example of a small image in V4L2_PIX_FMT_IPU3_SBGGR10 format.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. tabularcolumns:: |p{0.8cm}|p{4.0cm}|p{4.0cm}|p{4.0cm}|p{4.0cm}|
+
+.. flat-table::
+
+    * - start + 0:
+      - B\ :sub:`0000low`
+      - G\ :sub:`0001low`\ (bits 7--2)
+
+        B\ :sub:`0000high`\ (bits 1--0)
+      - B\ :sub:`0002low`\ (bits 7--4)
+
+        G\ :sub:`0001high`\ (bits 3--0)
+      - G\ :sub:`0003low`\ (bits 7--6)
+
+        B\ :sub:`0002high`\ (bits 5--0)
+    * - start + 4:
+      - G\ :sub:`0003high`
+      - B\ :sub:`0004low`
+      - G\ :sub:`0005low`\ (bits 7--2)
+
+        B\ :sub:`0004high`\ (bits 1--0)
+      - B\ :sub:`0006low`\ (bits 7--4)
+
+        G\ :sub:`0005high`\ (bits 3--0)
+    * - start + 8:
+      - G\ :sub:`0007low`\ (bits 7--6)
+
+        B\ :sub:`0006high`\ (bits 5--0)
+      - G\ :sub:`0007high`
+      - B\ :sub:`0008low`
+      - G\ :sub:`0009low`\ (bits 7--2)
+
+        B\ :sub:`0008high`\ (bits 1--0)
+    * - start + 12:
+      - B\ :sub:`0010low`\ (bits 7--4)
+
+        G\ :sub:`0009high`\ (bits 3--0)
+      - G\ :sub:`0011low`\ (bits 7--6)
+
+        B\ :sub:`0010high`\ (bits 5--0)
+      - G\ :sub:`0011high`
+      - B\ :sub:`0012low`
+    * - start + 16:
+      - G\ :sub:`0013low`\ (bits 7--2)
+
+        B\ :sub:`0012high`\ (bits 1--0)
+      - B\ :sub:`0014low`\ (bits 7--4)
+
+        G\ :sub:`0013high`\ (bits 3--0)
+      - G\ :sub:`0015low`\ (bits 7--6)
+
+        B\ :sub:`0014high`\ (bits 5--0)
+      - G\ :sub:`0015high`
+    * - start + 20
+      - B\ :sub:`0016low`
+      - G\ :sub:`0017low`\ (bits 7--2)
+
+        B\ :sub:`0016high`\ (bits 1--0)
+      - B\ :sub:`0018low`\ (bits 7--4)
+
+        G\ :sub:`0017high`\ (bits 3--0)
+      - G\ :sub:`0019low`\ (bits 7--6)
+
+        B\ :sub:`0018high`\ (bits 5--0)
+    * - start + 24:
+      - G\ :sub:`0019high`
+      - B\ :sub:`0020low`
+      - G\ :sub:`0021low`\ (bits 7--2)
+
+        B\ :sub:`0020high`\ (bits 1--0)
+      - B\ :sub:`0022low`\ (bits 7--4)
+
+        G\ :sub:`0021high`\ (bits 3--0)
+    * - start + 28:
+      - G\ :sub:`0023low`\ (bits 7--6)
+
+        B\ :sub:`0022high`\ (bits 5--0)
+      - G\ :sub:`0023high`
+      - B\ :sub:`0024low`
+      - B\ :sub:`0024high`\ (bits 1--0)
+    * - start + 32:
+      - G\ :sub:`0100low`
+      - R\ :sub:`0101low`\ (bits 7--2)
+
+        G\ :sub:`0100high`\ (bits 1--0)
+      - G\ :sub:`0102low`\ (bits 7--4)
+
+        R\ :sub:`0101high`\ (bits 3--0)
+      - R\ :sub:`0103low`\ (bits 7--6)
+
+        G\ :sub:`0102high`\ (bits 5--0)
+    * - start + 36:
+      - R\ :sub:`0103high`
+      - G\ :sub:`0104low`
+      - R\ :sub:`0105low`\ (bits 7--2)
+
+        G\ :sub:`0104high`\ (bits 1--0)
+      - G\ :sub:`0106low`\ (bits 7--4)
+
+        R\ :sub:`0105high`\ (bits 3--0)
+    * - start + 40:
+      - R\ :sub:`0107low`\ (bits 7--6)
+
+        G\ :sub:`0106high`\ (bits 5--0)
+      - R\ :sub:`0107high`
+      - G\ :sub:`0108low`
+      - R\ :sub:`0109low`\ (bits 7--2)
+
+        G\ :sub:`0108high`\ (bits 1--0)
+    * - start + 44:
+      - G\ :sub:`0110low`\ (bits 7--4)
+
+        R\ :sub:`0109high`\ (bits 3--0)
+      - R\ :sub:`0111low`\ (bits 7--6)
+
+        G\ :sub:`0110high`\ (bits 5--0)
+      - R\ :sub:`0111high`
+      - G\ :sub:`0112low`
+    * - start + 48:
+      - R\ :sub:`0113low`\ (bits 7--2)
+
+        G\ :sub:`0112high`\ (bits 1--0)
+      - G\ :sub:`0114low`\ (bits 7--4)
+
+        R\ :sub:`0113high`\ (bits 3--0)
+      - R\ :sub:`0115low`\ (bits 7--6)
+
+        G\ :sub:`0114high`\ (bits 5--0)
+      - R\ :sub:`0115high`
+    * - start + 52:
+      - G\ :sub:`0116low`
+      - R\ :sub:`0117low`\ (bits 7--2)
+
+        G\ :sub:`0116high`\ (bits 1--0)
+      - G\ :sub:`0118low`\ (bits 7--4)
+
+        R\ :sub:`0117high`\ (bits 3--0)
+      - R\ :sub:`0119low`\ (bits 7--6)
+
+        G\ :sub:`0118high`\ (bits 5--0)
+    * - start + 56:
+      - R\ :sub:`0119high`
+      - G\ :sub:`0120low`
+      - R\ :sub:`0121low`\ (bits 7--2)
+
+        G\ :sub:`0120high`\ (bits 1--0)
+      - G\ :sub:`0122low`\ (bits 7--4)
+
+        R\ :sub:`0121high`\ (bits 3--0)
+    * - start + 60:
+      - R\ :sub:`0123low`\ (bits 7--6)
+
+        G\ :sub:`0122high`\ (bits 5--0)
+      - R\ :sub:`0123high`
+      - G\ :sub:`0124low`
+      - G\ :sub:`0124high`\ (bits 1--0)
+    * - start + 64:
+      - B\ :sub:`0200low`
+      - G\ :sub:`0201low`\ (bits 7--2)
+
+        B\ :sub:`0200high`\ (bits 1--0)
+      - B\ :sub:`0202low`\ (bits 7--4)
+
+        G\ :sub:`0201high`\ (bits 3--0)
+      - G\ :sub:`0203low`\ (bits 7--6)
+
+        B\ :sub:`0202high`\ (bits 5--0)
+    * - start + 68:
+      - G\ :sub:`0203high`
+      - B\ :sub:`0204low`
+      - G\ :sub:`0205low`\ (bits 7--2)
+
+        B\ :sub:`0204high`\ (bits 1--0)
+      - B\ :sub:`0206low`\ (bits 7--4)
+
+        G\ :sub:`0205high`\ (bits 3--0)
+    * - start + 72:
+      - G\ :sub:`0207low`\ (bits 7--6)
+
+        B\ :sub:`0206high`\ (bits 5--0)
+      - G\ :sub:`0207high`
+      - B\ :sub:`0208low`
+      - G\ :sub:`0209low`\ (bits 7--2)
+
+        B\ :sub:`0208high`\ (bits 1--0)
+    * - start + 76:
+      - B\ :sub:`0210low`\ (bits 7--4)
+
+        G\ :sub:`0209high`\ (bits 3--0)
+      - G\ :sub:`0211low`\ (bits 7--6)
+
+        B\ :sub:`0210high`\ (bits 5--0)
+      - G\ :sub:`0211high`
+      - B\ :sub:`0212low`
+    * - start + 80:
+      - G\ :sub:`0213low`\ (bits 7--2)
+
+        B\ :sub:`0212high`\ (bits 1--0)
+      - B\ :sub:`0214low`\ (bits 7--4)
+
+        G\ :sub:`0213high`\ (bits 3--0)
+      - G\ :sub:`0215low`\ (bits 7--6)
+
+        B\ :sub:`0214high`\ (bits 5--0)
+      - G\ :sub:`0215high`
+    * - start + 84:
+      - B\ :sub:`0216low`
+      - G\ :sub:`0217low`\ (bits 7--2)
+
+        B\ :sub:`0216high`\ (bits 1--0)
+      - B\ :sub:`0218low`\ (bits 7--4)
+
+        G\ :sub:`0217high`\ (bits 3--0)
+      - G\ :sub:`0219low`\ (bits 7--6)
+
+        B\ :sub:`0218high`\ (bits 5--0)
+    * - start + 88:
+      - G\ :sub:`0219high`
+      - B\ :sub:`0220low`
+      - G\ :sub:`0221low`\ (bits 7--2)
+
+        B\ :sub:`0220high`\ (bits 1--0)
+      - B\ :sub:`0222low`\ (bits 7--4)
+
+        G\ :sub:`0221high`\ (bits 3--0)
+    * - start + 92:
+      - G\ :sub:`0223low`\ (bits 7--6)
+
+        B\ :sub:`0222high`\ (bits 5--0)
+      - G\ :sub:`0223high`
+      - B\ :sub:`0224low`
+      - B\ :sub:`0224high`\ (bits 1--0)
+    * - start + 96:
+      - G\ :sub:`0300low`
+      - R\ :sub:`0301low`\ (bits 7--2)
+
+        G\ :sub:`0300high`\ (bits 1--0)
+      - G\ :sub:`0302low`\ (bits 7--4)
+
+        R\ :sub:`0301high`\ (bits 3--0)
+      - R\ :sub:`0303low`\ (bits 7--6)
+
+        G\ :sub:`0302high`\ (bits 5--0)
+    * - start + 100:
+      - R\ :sub:`0303high`
+      - G\ :sub:`0304low`
+      - R\ :sub:`0305low`\ (bits 7--2)
+
+        G\ :sub:`0304high`\ (bits 1--0)
+      - G\ :sub:`0306low`\ (bits 7--4)
+
+        R\ :sub:`0305high`\ (bits 3--0)
+    * - start + 104:
+      - R\ :sub:`0307low`\ (bits 7--6)
+
+        G\ :sub:`0306high`\ (bits 5--0)
+      - R\ :sub:`0307high`
+      - G\ :sub:`0308low`
+      - R\ :sub:`0309low`\ (bits 7--2)
+
+        G\ :sub:`0308high`\ (bits 1--0)
+    * - start + 108:
+      - G\ :sub:`0310low`\ (bits 7--4)
+
+        R\ :sub:`0309high`\ (bits 3--0)
+      - R\ :sub:`0311low`\ (bits 7--6)
+
+        G\ :sub:`0310high`\ (bits 5--0)
+      - R\ :sub:`0311high`
+      - G\ :sub:`0312low`
+    * - start + 112:
+      - R\ :sub:`0313low`\ (bits 7--2)
+
+        G\ :sub:`0312high`\ (bits 1--0)
+      - G\ :sub:`0314low`\ (bits 7--4)
+
+        R\ :sub:`0313high`\ (bits 3--0)
+      - R\ :sub:`0315low`\ (bits 7--6)
+
+        G\ :sub:`0314high`\ (bits 5--0)
+      - R\ :sub:`0315high`
+    * - start + 116:
+      - G\ :sub:`0316low`
+      - R\ :sub:`0317low`\ (bits 7--2)
+
+        G\ :sub:`0316high`\ (bits 1--0)
+      - G\ :sub:`0318low`\ (bits 7--4)
+
+        R\ :sub:`0317high`\ (bits 3--0)
+      - R\ :sub:`0319low`\ (bits 7--6)
+
+        G\ :sub:`0318high`\ (bits 5--0)
+    * - start + 120:
+      - R\ :sub:`0319high`
+      - G\ :sub:`0320low`
+      - R\ :sub:`0321low`\ (bits 7--2)
+
+        G\ :sub:`0320high`\ (bits 1--0)
+      - G\ :sub:`0322low`\ (bits 7--4)
+
+        R\ :sub:`0321high`\ (bits 3--0)
+    * - start + 124:
+      - R\ :sub:`0323low`\ (bits 7--6)
+
+        G\ :sub:`0322high`\ (bits 5--0)
+      - R\ :sub:`0323high`
+      - G\ :sub:`0324low`
+      - G\ :sub:`0324high`\ (bits 1--0)
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb10.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb10.rst
new file mode 100644
index 000000000..a66414ab4
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb10.rst
@@ -0,0 +1,76 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SRGGB10:
+.. _v4l2-pix-fmt-sbggr10:
+.. _v4l2-pix-fmt-sgbrg10:
+.. _v4l2-pix-fmt-sgrbg10:
+
+***************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB10 ('RG10'), V4L2_PIX_FMT_SGRBG10 ('BA10'), V4L2_PIX_FMT_SGBRG10 ('GB10'), V4L2_PIX_FMT_SBGGR10 ('BG10'),
+***************************************************************************************************************************
+
+
+V4L2_PIX_FMT_SGRBG10
+V4L2_PIX_FMT_SGBRG10
+V4L2_PIX_FMT_SBGGR10
+10-bit Bayer formats expanded to 16 bits
+
+
+Description
+===========
+
+These four pixel formats are raw sRGB / Bayer formats with 10 bits per
+sample. Each sample is stored in a 16-bit word, with 6 unused
+high bits filled with zeros. Each n-pixel row contains n/2 green samples and
+n/2 blue or red samples, with alternating red and blue rows. Bytes are
+stored in memory in little endian order. They are conventionally described
+as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example of one of
+these formats:
+
+**Byte Order.**
+Each cell is one byte, the 6 most significant bits in the high bytes
+are 0.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - B\ :sub:`00low`
+      - B\ :sub:`00high`
+      - G\ :sub:`01low`
+      - G\ :sub:`01high`
+      - B\ :sub:`02low`
+      - B\ :sub:`02high`
+      - G\ :sub:`03low`
+      - G\ :sub:`03high`
+    * - start + 8:
+      - G\ :sub:`10low`
+      - G\ :sub:`10high`
+      - R\ :sub:`11low`
+      - R\ :sub:`11high`
+      - G\ :sub:`12low`
+      - G\ :sub:`12high`
+      - R\ :sub:`13low`
+      - R\ :sub:`13high`
+    * - start + 16:
+      - B\ :sub:`20low`
+      - B\ :sub:`20high`
+      - G\ :sub:`21low`
+      - G\ :sub:`21high`
+      - B\ :sub:`22low`
+      - B\ :sub:`22high`
+      - G\ :sub:`23low`
+      - G\ :sub:`23high`
+    * - start + 24:
+      - G\ :sub:`30low`
+      - G\ :sub:`30high`
+      - R\ :sub:`31low`
+      - R\ :sub:`31high`
+      - G\ :sub:`32low`
+      - G\ :sub:`32high`
+      - R\ :sub:`33low`
+      - R\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb10alaw8.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb10alaw8.rst
new file mode 100644
index 000000000..a5ae1f099
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb10alaw8.rst
@@ -0,0 +1,24 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SBGGR10ALAW8:
+.. _v4l2-pix-fmt-sgbrg10alaw8:
+.. _v4l2-pix-fmt-sgrbg10alaw8:
+.. _v4l2-pix-fmt-srggb10alaw8:
+
+***********************************************************************************************************************************************
+V4L2_PIX_FMT_SBGGR10ALAW8 ('aBA8'), V4L2_PIX_FMT_SGBRG10ALAW8 ('aGA8'), V4L2_PIX_FMT_SGRBG10ALAW8 ('agA8'), V4L2_PIX_FMT_SRGGB10ALAW8 ('aRA8'),
+***********************************************************************************************************************************************
+
+V4L2_PIX_FMT_SGBRG10ALAW8
+V4L2_PIX_FMT_SGRBG10ALAW8
+V4L2_PIX_FMT_SRGGB10ALAW8
+10-bit Bayer formats compressed to 8 bits
+
+
+Description
+===========
+
+These four pixel formats are raw sRGB / Bayer formats with 10 bits per
+color compressed to 8 bits each, using the A-LAW algorithm. Each color
+component consumes 8 bits of memory. In other respects this format is
+similar to :ref:`V4L2-PIX-FMT-SRGGB8`.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb10dpcm8.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb10dpcm8.rst
new file mode 100644
index 000000000..f0544c6f4
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb10dpcm8.rst
@@ -0,0 +1,28 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SBGGR10DPCM8:
+.. _v4l2-pix-fmt-sgbrg10dpcm8:
+.. _v4l2-pix-fmt-sgrbg10dpcm8:
+.. _v4l2-pix-fmt-srggb10dpcm8:
+
+
+***********************************************************************************************************************************************
+V4L2_PIX_FMT_SBGGR10DPCM8 ('bBA8'), V4L2_PIX_FMT_SGBRG10DPCM8 ('bGA8'), V4L2_PIX_FMT_SGRBG10DPCM8 ('BD10'), V4L2_PIX_FMT_SRGGB10DPCM8 ('bRA8'),
+***********************************************************************************************************************************************
+
+*man V4L2_PIX_FMT_SBGGR10DPCM8(2)*
+
+V4L2_PIX_FMT_SGBRG10DPCM8
+V4L2_PIX_FMT_SGRBG10DPCM8
+V4L2_PIX_FMT_SRGGB10DPCM8
+10-bit Bayer formats compressed to 8 bits
+
+
+Description
+===========
+
+These four pixel formats are raw sRGB / Bayer formats with 10 bits per
+colour compressed to 8 bits each, using DPCM compression. DPCM,
+differential pulse-code modulation, is lossy. Each colour component
+consumes 8 bits of memory. In other respects this format is similar to
+:ref:`V4L2-PIX-FMT-SRGGB10`.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb10p.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb10p.rst
new file mode 100644
index 000000000..dc52e827b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb10p.rst
@@ -0,0 +1,74 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SRGGB10P:
+.. _v4l2-pix-fmt-sbggr10p:
+.. _v4l2-pix-fmt-sgbrg10p:
+.. _v4l2-pix-fmt-sgrbg10p:
+
+*******************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB10P ('pRAA'), V4L2_PIX_FMT_SGRBG10P ('pgAA'), V4L2_PIX_FMT_SGBRG10P ('pGAA'), V4L2_PIX_FMT_SBGGR10P ('pBAA'),
+*******************************************************************************************************************************
+
+
+V4L2_PIX_FMT_SGRBG10P
+V4L2_PIX_FMT_SGBRG10P
+V4L2_PIX_FMT_SBGGR10P
+10-bit packed Bayer formats
+
+
+Description
+===========
+
+These four pixel formats are packed raw sRGB / Bayer formats with 10
+bits per sample. Every four consecutive samples are packed into 5
+bytes. Each of the first 4 bytes contain the 8 high order bits
+of the pixels, and the 5th byte contains the 2 least significants
+bits of each pixel, in the same order.
+
+Each n-pixel row contains n/2 green samples and n/2 blue or red samples,
+with alternating green-red and green-blue rows. They are conventionally
+described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example
+of a small V4L2_PIX_FMT_SBGGR10P image:
+
+**Byte Order.**
+Each cell is one byte.
+
+.. tabularcolumns:: |p{2.4cm}|p{1.4cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{6.4cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 12 8 8 8 8 68
+
+    * - start + 0:
+      - B\ :sub:`00high`
+      - G\ :sub:`01high`
+      - B\ :sub:`02high`
+      - G\ :sub:`03high`
+      - G\ :sub:`03low`\ (bits 7--6) B\ :sub:`02low`\ (bits 5--4)
+
+	G\ :sub:`01low`\ (bits 3--2) B\ :sub:`00low`\ (bits 1--0)
+    * - start + 5:
+      - G\ :sub:`10high`
+      - R\ :sub:`11high`
+      - G\ :sub:`12high`
+      - R\ :sub:`13high`
+      - R\ :sub:`13low`\ (bits 7--6) G\ :sub:`12low`\ (bits 5--4)
+
+	R\ :sub:`11low`\ (bits 3--2) G\ :sub:`10low`\ (bits 1--0)
+    * - start + 10:
+      - B\ :sub:`20high`
+      - G\ :sub:`21high`
+      - B\ :sub:`22high`
+      - G\ :sub:`23high`
+      - G\ :sub:`23low`\ (bits 7--6) B\ :sub:`22low`\ (bits 5--4)
+
+	G\ :sub:`21low`\ (bits 3--2) B\ :sub:`20low`\ (bits 1--0)
+    * - start + 15:
+      - G\ :sub:`30high`
+      - R\ :sub:`31high`
+      - G\ :sub:`32high`
+      - R\ :sub:`33high`
+      - R\ :sub:`33low`\ (bits 7--6) G\ :sub:`32low`\ (bits 5--4)
+
+	R\ :sub:`31low`\ (bits 3--2) G\ :sub:`30low`\ (bits 1--0)
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb12.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb12.rst
new file mode 100644
index 000000000..15c34e1e4
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb12.rst
@@ -0,0 +1,77 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SRGGB12:
+.. _v4l2-pix-fmt-sbggr12:
+.. _v4l2-pix-fmt-sgbrg12:
+.. _v4l2-pix-fmt-sgrbg12:
+
+
+***************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB12 ('RG12'), V4L2_PIX_FMT_SGRBG12 ('BA12'), V4L2_PIX_FMT_SGBRG12 ('GB12'), V4L2_PIX_FMT_SBGGR12 ('BG12'),
+***************************************************************************************************************************
+
+
+V4L2_PIX_FMT_SGRBG12
+V4L2_PIX_FMT_SGBRG12
+V4L2_PIX_FMT_SBGGR12
+12-bit Bayer formats expanded to 16 bits
+
+
+Description
+===========
+
+These four pixel formats are raw sRGB / Bayer formats with 12 bits per
+colour. Each colour component is stored in a 16-bit word, with 4 unused
+high bits filled with zeros. Each n-pixel row contains n/2 green samples
+and n/2 blue or red samples, with alternating red and blue rows. Bytes
+are stored in memory in little endian order. They are conventionally
+described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example
+of a small V4L2_PIX_FMT_SBGGR12 image:
+
+**Byte Order.**
+Each cell is one byte, the 4 most significant bits in the high bytes are
+0.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - B\ :sub:`00low`
+      - B\ :sub:`00high`
+      - G\ :sub:`01low`
+      - G\ :sub:`01high`
+      - B\ :sub:`02low`
+      - B\ :sub:`02high`
+      - G\ :sub:`03low`
+      - G\ :sub:`03high`
+    * - start + 8:
+      - G\ :sub:`10low`
+      - G\ :sub:`10high`
+      - R\ :sub:`11low`
+      - R\ :sub:`11high`
+      - G\ :sub:`12low`
+      - G\ :sub:`12high`
+      - R\ :sub:`13low`
+      - R\ :sub:`13high`
+    * - start + 16:
+      - B\ :sub:`20low`
+      - B\ :sub:`20high`
+      - G\ :sub:`21low`
+      - G\ :sub:`21high`
+      - B\ :sub:`22low`
+      - B\ :sub:`22high`
+      - G\ :sub:`23low`
+      - G\ :sub:`23high`
+    * - start + 24:
+      - G\ :sub:`30low`
+      - G\ :sub:`30high`
+      - R\ :sub:`31low`
+      - R\ :sub:`31high`
+      - G\ :sub:`32low`
+      - G\ :sub:`32high`
+      - R\ :sub:`33low`
+      - R\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb12p.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb12p.rst
new file mode 100644
index 000000000..a2f8ebfce
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb12p.rst
@@ -0,0 +1,87 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SRGGB12P:
+.. _v4l2-pix-fmt-sbggr12p:
+.. _v4l2-pix-fmt-sgbrg12p:
+.. _v4l2-pix-fmt-sgrbg12p:
+
+*******************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB12P ('pRCC'), V4L2_PIX_FMT_SGRBG12P ('pgCC'), V4L2_PIX_FMT_SGBRG12P ('pGCC'), V4L2_PIX_FMT_SBGGR12P ('pBCC'),
+*******************************************************************************************************************************
+
+
+12-bit packed Bayer formats
+---------------------------
+
+
+Description
+===========
+
+These four pixel formats are packed raw sRGB / Bayer formats with 12
+bits per colour. Every two consecutive samples are packed into three
+bytes. Each of the first two bytes contain the 8 high order bits of
+the pixels, and the third byte contains the four least significants
+bits of each pixel, in the same order.
+
+Each n-pixel row contains n/2 green samples and n/2 blue or red
+samples, with alternating green-red and green-blue rows. They are
+conventionally described as GRGR... BGBG..., RGRG... GBGB..., etc.
+Below is an example of a small V4L2_PIX_FMT_SBGGR12P image:
+
+**Byte Order.**
+Each cell is one byte.
+
+.. tabularcolumns:: |p{2.2cm}|p{1.2cm}|p{1.2cm}|p{3.1cm}|p{1.2cm}|p{1.2cm}|p{3.1cm}|
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       2 1 1 1 1 1 1
+
+
+    -  -  start + 0:
+       -  B\ :sub:`00high`
+       -  G\ :sub:`01high`
+       -  G\ :sub:`01low`\ (bits 7--4)
+
+          B\ :sub:`00low`\ (bits 3--0)
+       -  B\ :sub:`02high`
+       -  G\ :sub:`03high`
+       -  G\ :sub:`03low`\ (bits 7--4)
+
+          B\ :sub:`02low`\ (bits 3--0)
+
+    -  -  start + 6:
+       -  G\ :sub:`10high`
+       -  R\ :sub:`11high`
+       -  R\ :sub:`11low`\ (bits 7--4)
+
+          G\ :sub:`10low`\ (bits 3--0)
+       -  G\ :sub:`12high`
+       -  R\ :sub:`13high`
+       -  R\ :sub:`13low`\ (bits 3--2)
+
+          G\ :sub:`12low`\ (bits 3--0)
+    -  -  start + 12:
+       -  B\ :sub:`20high`
+       -  G\ :sub:`21high`
+       -  G\ :sub:`21low`\ (bits 7--4)
+
+          B\ :sub:`20low`\ (bits 3--0)
+       -  B\ :sub:`22high`
+       -  G\ :sub:`23high`
+       -  G\ :sub:`23low`\ (bits 7--4)
+
+          B\ :sub:`22low`\ (bits 3--0)
+    -  -  start + 18:
+       -  G\ :sub:`30high`
+       -  R\ :sub:`31high`
+       -  R\ :sub:`31low`\ (bits 7--4)
+
+          G\ :sub:`30low`\ (bits 3--0)
+       -  G\ :sub:`32high`
+       -  R\ :sub:`33high`
+       -  R\ :sub:`33low`\ (bits 3--2)
+
+          G\ :sub:`32low`\ (bits 3--0)
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb14.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb14.rst
new file mode 100644
index 000000000..7e5d45f30
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb14.rst
@@ -0,0 +1,75 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SRGGB14:
+.. _v4l2-pix-fmt-sbggr14:
+.. _v4l2-pix-fmt-sgbrg14:
+.. _v4l2-pix-fmt-sgrbg14:
+
+
+***************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB14 ('RG14'), V4L2_PIX_FMT_SGRBG14 ('GR14'), V4L2_PIX_FMT_SGBRG14 ('GB14'), V4L2_PIX_FMT_SBGGR14 ('BG14'),
+***************************************************************************************************************************
+
+
+14-bit Bayer formats expanded to 16 bits
+
+
+Description
+===========
+
+These four pixel formats are raw sRGB / Bayer formats with 14 bits per
+colour. Each sample is stored in a 16-bit word, with two unused high
+bits filled with zeros. Each n-pixel row contains n/2 green samples
+and n/2 blue or red samples, with alternating red and blue rows. Bytes
+are stored in memory in little endian order. They are conventionally
+described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an
+example of a small V4L2_PIX_FMT_SBGGR14 image:
+
+**Byte Order.**
+Each cell is one byte, the two most significant bits in the high bytes are
+zero.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       2 1 1 1 1 1 1 1 1
+
+
+    * - start + 0:
+      - B\ :sub:`00low`
+      - B\ :sub:`00high`
+      - G\ :sub:`01low`
+      - G\ :sub:`01high`
+      - B\ :sub:`02low`
+      - B\ :sub:`02high`
+      - G\ :sub:`03low`
+      - G\ :sub:`03high`
+    * - start + 8:
+      - G\ :sub:`10low`
+      - G\ :sub:`10high`
+      - R\ :sub:`11low`
+      - R\ :sub:`11high`
+      - G\ :sub:`12low`
+      - G\ :sub:`12high`
+      - R\ :sub:`13low`
+      - R\ :sub:`13high`
+    * - start + 16:
+      - B\ :sub:`20low`
+      - B\ :sub:`20high`
+      - G\ :sub:`21low`
+      - G\ :sub:`21high`
+      - B\ :sub:`22low`
+      - B\ :sub:`22high`
+      - G\ :sub:`23low`
+      - G\ :sub:`23high`
+    * - start + 24:
+      - G\ :sub:`30low`
+      - G\ :sub:`30high`
+      - R\ :sub:`31low`
+      - R\ :sub:`31high`
+      - G\ :sub:`32low`
+      - G\ :sub:`32high`
+      - R\ :sub:`33low`
+      - R\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb14p.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb14p.rst
new file mode 100644
index 000000000..e25baedfc
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb14p.rst
@@ -0,0 +1,145 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SRGGB14P:
+.. _v4l2-pix-fmt-sbggr14p:
+.. _v4l2-pix-fmt-sgbrg14p:
+.. _v4l2-pix-fmt-sgrbg14p:
+
+*******************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB14P ('pREE'), V4L2_PIX_FMT_SGRBG14P ('pgEE'), V4L2_PIX_FMT_SGBRG14P ('pGEE'), V4L2_PIX_FMT_SBGGR14P ('pBEE'),
+*******************************************************************************************************************************
+
+*man V4L2_PIX_FMT_SRGGB14P(2)*
+
+V4L2_PIX_FMT_SGRBG14P
+V4L2_PIX_FMT_SGBRG14P
+V4L2_PIX_FMT_SBGGR14P
+14-bit packed Bayer formats
+
+
+Description
+===========
+
+These four pixel formats are packed raw sRGB / Bayer formats with 14
+bits per colour. Every four consecutive samples are packed into seven
+bytes. Each of the first four bytes contain the eight high order bits
+of the pixels, and the three following bytes contains the six least
+significants bits of each pixel, in the same order.
+
+Each n-pixel row contains n/2 green samples and n/2 blue or red samples,
+with alternating green-red and green-blue rows. They are conventionally
+described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example
+of one of these formats:
+
+**Byte Order.**
+Each cell is one byte.
+
+.. raw:: latex
+
+    \footnotesize
+
+.. tabularcolumns:: |p{1.8cm}|p{1.0cm}|p{1.0cm}|p{1.0cm}|p{1.1cm}|p{3.3cm}|p{3.3cm}|p{3.3cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       2 1 1 1 1 3 3 3
+
+
+    -  .. row 1
+
+       -  start + 0
+
+       -  B\ :sub:`00high`
+
+       -  G\ :sub:`01high`
+
+       -  B\ :sub:`02high`
+
+       -  G\ :sub:`03high`
+
+       -  G\ :sub:`01low bits 1--0`\ (bits 7--6)
+
+	  B\ :sub:`00low bits 5--0`\ (bits 5--0)
+
+       -  B\ :sub:`02low bits 3--0`\ (bits 7--4)
+
+	  G\ :sub:`01low bits 5--2`\ (bits 3--0)
+
+       -  G\ :sub:`03low bits 5--0`\ (bits 7--2)
+
+	  B\ :sub:`02low bits 5--4`\ (bits 1--0)
+
+    -  .. row 2
+
+       -  start + 7
+
+       -  G\ :sub:`10high`
+
+       -  R\ :sub:`11high`
+
+       -  G\ :sub:`12high`
+
+       -  R\ :sub:`13high`
+
+       -  R\ :sub:`11low bits 1--0`\ (bits 7--6)
+
+	  G\ :sub:`10low bits 5--0`\ (bits 5--0)
+
+       -  G\ :sub:`12low bits 3--0`\ (bits 7--4)
+
+	  R\ :sub:`11low bits 5--2`\ (bits 3--0)
+
+       -  R\ :sub:`13low bits 5--0`\ (bits 7--2)
+
+	  G\ :sub:`12low bits 5--4`\ (bits 1--0)
+
+    -  .. row 3
+
+       -  start + 14
+
+       -  B\ :sub:`20high`
+
+       -  G\ :sub:`21high`
+
+       -  B\ :sub:`22high`
+
+       -  G\ :sub:`23high`
+
+       -  G\ :sub:`21low bits 1--0`\ (bits 7--6)
+
+	  B\ :sub:`20low bits 5--0`\ (bits 5--0)
+
+       -  B\ :sub:`22low bits 3--0`\ (bits 7--4)
+
+	  G\ :sub:`21low bits 5--2`\ (bits 3--0)
+
+       -  G\ :sub:`23low bits 5--0`\ (bits 7--2)
+
+	  B\ :sub:`22low bits 5--4`\ (bits 1--0)
+
+    -  .. row 4
+
+       -  start + 21
+
+       -  G\ :sub:`30high`
+
+       -  R\ :sub:`31high`
+
+       -  G\ :sub:`32high`
+
+       -  R\ :sub:`33high`
+
+       -  R\ :sub:`31low bits 1--0`\ (bits 7--6)
+	  G\ :sub:`30low bits 5--0`\ (bits 5--0)
+
+       -  G\ :sub:`32low bits 3--0`\ (bits 7--4)
+	  R\ :sub:`31low bits 5--2`\ (bits 3--0)
+
+       -  R\ :sub:`33low bits 5--0`\ (bits 7--2)
+	  G\ :sub:`32low bits 5--4`\ (bits 1--0)
+
+.. raw:: latex
+
+    \normalsize
+
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb16.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb16.rst
new file mode 100644
index 000000000..93a210e22
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb16.rst
@@ -0,0 +1,69 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SRGGB16:
+.. _v4l2-pix-fmt-sbggr16:
+.. _v4l2-pix-fmt-sgbrg16:
+.. _v4l2-pix-fmt-sgrbg16:
+
+
+***************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB16 ('RG16'), V4L2_PIX_FMT_SGRBG16 ('GR16'), V4L2_PIX_FMT_SGBRG16 ('GB16'), V4L2_PIX_FMT_SBGGR16 ('BYR2'),
+***************************************************************************************************************************
+
+
+16-bit Bayer formats
+
+
+Description
+===========
+
+These four pixel formats are raw sRGB / Bayer formats with 16 bits per
+sample. Each sample is stored in a 16-bit word. Each n-pixel row contains
+n/2 green samples and n/2 blue or red samples, with alternating red and blue
+rows. Bytes are stored in memory in little endian order. They are
+conventionally described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is
+an example of a small V4L2_PIX_FMT_SBGGR16 image:
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - B\ :sub:`00low`
+      - B\ :sub:`00high`
+      - G\ :sub:`01low`
+      - G\ :sub:`01high`
+      - B\ :sub:`02low`
+      - B\ :sub:`02high`
+      - G\ :sub:`03low`
+      - G\ :sub:`03high`
+    * - start + 8:
+      - G\ :sub:`10low`
+      - G\ :sub:`10high`
+      - R\ :sub:`11low`
+      - R\ :sub:`11high`
+      - G\ :sub:`12low`
+      - G\ :sub:`12high`
+      - R\ :sub:`13low`
+      - R\ :sub:`13high`
+    * - start + 16:
+      - B\ :sub:`20low`
+      - B\ :sub:`20high`
+      - G\ :sub:`21low`
+      - G\ :sub:`21high`
+      - B\ :sub:`22low`
+      - B\ :sub:`22high`
+      - G\ :sub:`23low`
+      - G\ :sub:`23high`
+    * - start + 24:
+      - G\ :sub:`30low`
+      - G\ :sub:`30high`
+      - R\ :sub:`31low`
+      - R\ :sub:`31high`
+      - G\ :sub:`32low`
+      - G\ :sub:`32high`
+      - R\ :sub:`33low`
+      - R\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-srggb8.rst b/Documentation/userspace-api/media/v4l/pixfmt-srggb8.rst
new file mode 100644
index 000000000..81e72f115
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-srggb8.rst
@@ -0,0 +1,54 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-SRGGB8:
+.. _v4l2-pix-fmt-sbggr8:
+.. _v4l2-pix-fmt-sgbrg8:
+.. _v4l2-pix-fmt-sgrbg8:
+
+***************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB8 ('RGGB'), V4L2_PIX_FMT_SGRBG8 ('GRBG'), V4L2_PIX_FMT_SGBRG8 ('GBRG'), V4L2_PIX_FMT_SBGGR8 ('BA81'),
+***************************************************************************************************************************
+
+
+8-bit Bayer formats
+
+
+Description
+===========
+
+These four pixel formats are raw sRGB / Bayer formats with 8 bits per
+sample. Each sample is stored in a byte. Each n-pixel row contains n/2
+green samples and n/2 blue or red samples, with alternating red and
+blue rows. They are conventionally described as GRGR... BGBG...,
+RGRG... GBGB..., etc. Below is an example of a small V4L2_PIX_FMT_SBGGR8 image:
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - B\ :sub:`00`
+      - G\ :sub:`01`
+      - B\ :sub:`02`
+      - G\ :sub:`03`
+    * - start + 4:
+      - G\ :sub:`10`
+      - R\ :sub:`11`
+      - G\ :sub:`12`
+      - R\ :sub:`13`
+    * - start + 8:
+      - B\ :sub:`20`
+      - G\ :sub:`21`
+      - B\ :sub:`22`
+      - G\ :sub:`23`
+    * - start + 12:
+      - G\ :sub:`30`
+      - R\ :sub:`31`
+      - G\ :sub:`32`
+      - R\ :sub:`33`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-tch-td08.rst b/Documentation/userspace-api/media/v4l/pixfmt-tch-td08.rst
new file mode 100644
index 000000000..ec89f43c6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-tch-td08.rst
@@ -0,0 +1,52 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-TCH-FMT-DELTA-TD08:
+
+********************************
+V4L2_TCH_FMT_DELTA_TD08 ('TD08')
+********************************
+
+*man V4L2_TCH_FMT_DELTA_TD08(2)*
+
+8-bit signed Touch Delta
+
+Description
+===========
+
+This format represents delta data from a touch controller.
+
+Delta values may range from -128 to 127. Typically the values will vary through
+a small range depending on whether the sensor is touched or not. The full value
+may be seen if one of the touchscreen nodes has a fault or the line is not
+connected.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       2 1 1 1 1
+
+    * - start + 0:
+      - D'\ :sub:`00`
+      - D'\ :sub:`01`
+      - D'\ :sub:`02`
+      - D'\ :sub:`03`
+    * - start + 4:
+      - D'\ :sub:`10`
+      - D'\ :sub:`11`
+      - D'\ :sub:`12`
+      - D'\ :sub:`13`
+    * - start + 8:
+      - D'\ :sub:`20`
+      - D'\ :sub:`21`
+      - D'\ :sub:`22`
+      - D'\ :sub:`23`
+    * - start + 12:
+      - D'\ :sub:`30`
+      - D'\ :sub:`31`
+      - D'\ :sub:`32`
+      - D'\ :sub:`33`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-tch-td16.rst b/Documentation/userspace-api/media/v4l/pixfmt-tch-td16.rst
new file mode 100644
index 000000000..7b59a6424
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-tch-td16.rst
@@ -0,0 +1,67 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-TCH-FMT-DELTA-TD16:
+
+********************************
+V4L2_TCH_FMT_DELTA_TD16 ('TD16')
+********************************
+
+*man V4L2_TCH_FMT_DELTA_TD16(2)*
+
+16-bit signed little endian Touch Delta
+
+
+Description
+===========
+
+This format represents delta data from a touch controller.
+
+Delta values may range from -32768 to 32767. Typically the values will vary
+through a small range depending on whether the sensor is touched or not. The
+full value may be seen if one of the touchscreen nodes has a fault or the line
+is not connected.
+
+**Byte Order.**
+Each cell is one byte.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       2 1 1 1 1 1 1 1 1
+
+    * - start + 0:
+      - D'\ :sub:`00low`
+      - D'\ :sub:`00high`
+      - D'\ :sub:`01low`
+      - D'\ :sub:`01high`
+      - D'\ :sub:`02low`
+      - D'\ :sub:`02high`
+      - D'\ :sub:`03low`
+      - D'\ :sub:`03high`
+    * - start + 8:
+      - D'\ :sub:`10low`
+      - D'\ :sub:`10high`
+      - D'\ :sub:`11low`
+      - D'\ :sub:`11high`
+      - D'\ :sub:`12low`
+      - D'\ :sub:`12high`
+      - D'\ :sub:`13low`
+      - D'\ :sub:`13high`
+    * - start + 16:
+      - D'\ :sub:`20low`
+      - D'\ :sub:`20high`
+      - D'\ :sub:`21low`
+      - D'\ :sub:`21high`
+      - D'\ :sub:`22low`
+      - D'\ :sub:`22high`
+      - D'\ :sub:`23low`
+      - D'\ :sub:`23high`
+    * - start + 24:
+      - D'\ :sub:`30low`
+      - D'\ :sub:`30high`
+      - D'\ :sub:`31low`
+      - D'\ :sub:`31high`
+      - D'\ :sub:`32low`
+      - D'\ :sub:`32high`
+      - D'\ :sub:`33low`
+      - D'\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-tch-tu08.rst b/Documentation/userspace-api/media/v4l/pixfmt-tch-tu08.rst
new file mode 100644
index 000000000..63c5264b8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-tch-tu08.rst
@@ -0,0 +1,50 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-TCH-FMT-TU08:
+
+**************************
+V4L2_TCH_FMT_TU08 ('TU08')
+**************************
+
+*man V4L2_TCH_FMT_TU08(2)*
+
+8-bit unsigned raw touch data
+
+Description
+===========
+
+This format represents unsigned 8-bit data from a touch controller.
+
+This may be used for output for raw and reference data. Values may range from
+0 to 255.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       2 1 1 1 1
+
+    * - start + 0:
+      - R'\ :sub:`00`
+      - R'\ :sub:`01`
+      - R'\ :sub:`02`
+      - R'\ :sub:`03`
+    * - start + 4:
+      - R'\ :sub:`10`
+      - R'\ :sub:`11`
+      - R'\ :sub:`12`
+      - R'\ :sub:`13`
+    * - start + 8:
+      - R'\ :sub:`20`
+      - R'\ :sub:`21`
+      - R'\ :sub:`22`
+      - R'\ :sub:`23`
+    * - start + 12:
+      - R'\ :sub:`30`
+      - R'\ :sub:`31`
+      - R'\ :sub:`32`
+      - R'\ :sub:`33`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-tch-tu16.rst b/Documentation/userspace-api/media/v4l/pixfmt-tch-tu16.rst
new file mode 100644
index 000000000..ade618a03
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-tch-tu16.rst
@@ -0,0 +1,66 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-TCH-FMT-TU16:
+
+********************************
+V4L2_TCH_FMT_TU16 ('TU16')
+********************************
+
+*man V4L2_TCH_FMT_TU16(2)*
+
+16-bit unsigned little endian raw touch data
+
+
+Description
+===========
+
+This format represents unsigned 16-bit data from a touch controller.
+
+This may be used for output for raw and reference data. Values may range from
+0 to 65535.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       2 1 1 1 1 1 1 1 1
+
+    * - start + 0:
+      - R'\ :sub:`00low`
+      - R'\ :sub:`00high`
+      - R'\ :sub:`01low`
+      - R'\ :sub:`01high`
+      - R'\ :sub:`02low`
+      - R'\ :sub:`02high`
+      - R'\ :sub:`03low`
+      - R'\ :sub:`03high`
+    * - start + 8:
+      - R'\ :sub:`10low`
+      - R'\ :sub:`10high`
+      - R'\ :sub:`11low`
+      - R'\ :sub:`11high`
+      - R'\ :sub:`12low`
+      - R'\ :sub:`12high`
+      - R'\ :sub:`13low`
+      - R'\ :sub:`13high`
+    * - start + 16:
+      - R'\ :sub:`20low`
+      - R'\ :sub:`20high`
+      - R'\ :sub:`21low`
+      - R'\ :sub:`21high`
+      - R'\ :sub:`22low`
+      - R'\ :sub:`22high`
+      - R'\ :sub:`23low`
+      - R'\ :sub:`23high`
+    * - start + 24:
+      - R'\ :sub:`30low`
+      - R'\ :sub:`30high`
+      - R'\ :sub:`31low`
+      - R'\ :sub:`31high`
+      - R'\ :sub:`32low`
+      - R'\ :sub:`32high`
+      - R'\ :sub:`33low`
+      - R'\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-uv8.rst b/Documentation/userspace-api/media/v4l/pixfmt-uv8.rst
new file mode 100644
index 000000000..ff1d73ef5
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-uv8.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-UV8:
+
+************************
+V4L2_PIX_FMT_UV8 ('UV8')
+************************
+
+
+UV plane interleaved
+
+
+Description
+===========
+
+In this format there is no Y plane, Only CbCr plane. ie (UV interleaved)
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Cb\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cr\ :sub:`01`
+    * - start + 4:
+      - Cb\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cr\ :sub:`11`
+    * - start + 8:
+      - Cb\ :sub:`20`
+      - Cr\ :sub:`20`
+      - Cb\ :sub:`21`
+      - Cr\ :sub:`21`
+    * - start + 12:
+      - Cb\ :sub:`30`
+      - Cr\ :sub:`30`
+      - Cb\ :sub:`31`
+      - Cr\ :sub:`31`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-uyvy.rst b/Documentation/userspace-api/media/v4l/pixfmt-uyvy.rst
new file mode 100644
index 000000000..bae975fb1
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-uyvy.rst
@@ -0,0 +1,110 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-UYVY:
+
+**************************
+V4L2_PIX_FMT_UYVY ('UYVY')
+**************************
+
+
+Variation of ``V4L2_PIX_FMT_YUYV`` with different order of samples in
+memory
+
+
+Description
+===========
+
+In this format each four bytes is two pixels. Each four bytes is two
+Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr
+belong to both pixels. As you can see, the Cr and Cb components have
+half the horizontal resolution of the Y component.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Cb\ :sub:`00`
+      - Y'\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Cb\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Cr\ :sub:`01`
+      - Y'\ :sub:`03`
+    * - start + 8:
+      - Cb\ :sub:`10`
+      - Y'\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Cb\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Cr\ :sub:`11`
+      - Y'\ :sub:`13`
+    * - start + 16:
+      - Cb\ :sub:`20`
+      - Y'\ :sub:`20`
+      - Cr\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Cb\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Cr\ :sub:`21`
+      - Y'\ :sub:`23`
+    * - start + 24:
+      - Cb\ :sub:`30`
+      - Y'\ :sub:`30`
+      - Cr\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Cb\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Cr\ :sub:`31`
+      - Y'\ :sub:`33`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 1
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 2
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 3
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-v4l2-mplane.rst b/Documentation/userspace-api/media/v4l/pixfmt-v4l2-mplane.rst
new file mode 100644
index 000000000..977facc3a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-v4l2-mplane.rst
@@ -0,0 +1,123 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+******************************
+Multi-planar format structures
+******************************
+
+The struct :c:type:`v4l2_plane_pix_format` structures define size
+and layout for each of the planes in a multi-planar format. The
+struct :c:type:`v4l2_pix_format_mplane` structure contains
+information common to all planes (such as image width and height) and an
+array of struct :c:type:`v4l2_plane_pix_format` structures,
+describing all planes of that format.
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_plane_pix_format
+
+.. flat-table:: struct v4l2_plane_pix_format
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``sizeimage``
+      - Maximum size in bytes required for image data in this plane,
+	set by the driver. When the image consists of variable length
+	compressed data this is the number of bytes required by the
+	codec to support the worst-case compression scenario.
+
+	The driver will set the value for uncompressed images.
+
+	Clients are allowed to set the sizeimage field for variable length
+	compressed data flagged with ``V4L2_FMT_FLAG_COMPRESSED`` at
+	:ref:`VIDIOC_ENUM_FMT`, but the driver may ignore it and set the
+	value itself, or it may modify the provided value based on
+	alignment requirements or minimum/maximum size requirements.
+	If the client wants to leave this to the driver, then it should
+	set sizeimage to 0.
+    * - __u32
+      - ``bytesperline``
+      - Distance in bytes between the leftmost pixels in two adjacent
+	lines. See struct :c:type:`v4l2_pix_format`.
+    * - __u16
+      - ``reserved[6]``
+      - Reserved for future extensions. Should be zeroed by drivers and
+	applications.
+
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{4.4cm}|p{5.6cm}|p{7.5cm}|
+
+.. c:type:: v4l2_pix_format_mplane
+
+.. flat-table:: struct v4l2_pix_format_mplane
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``width``
+      - Image width in pixels. See struct
+	:c:type:`v4l2_pix_format`.
+    * - __u32
+      - ``height``
+      - Image height in pixels. See struct
+	:c:type:`v4l2_pix_format`.
+    * - __u32
+      - ``pixelformat``
+      - The pixel format. Both single- and multi-planar four character
+	codes can be used.
+    * - __u32
+      - ``field``
+      - Field order, from enum :c:type:`v4l2_field`.
+        See struct :c:type:`v4l2_pix_format`.
+    * - __u32
+      - ``colorspace``
+      - Colorspace encoding, from enum :c:type:`v4l2_colorspace`.
+        See struct :c:type:`v4l2_pix_format`.
+    * - struct :c:type:`v4l2_plane_pix_format`
+      - ``plane_fmt[VIDEO_MAX_PLANES]``
+      - An array of structures describing format of each plane this pixel
+	format consists of. The number of valid entries in this array has
+	to be put in the ``num_planes`` field.
+    * - __u8
+      - ``num_planes``
+      - Number of planes (i.e. separate memory buffers) for this format
+	and the number of valid entries in the ``plane_fmt`` array.
+    * - __u8
+      - ``flags``
+      - Flags set by the application or driver, see :ref:`format-flags`.
+    * - union {
+      - (anonymous)
+    * - __u8
+      - ``ycbcr_enc``
+      - Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`.
+	See struct :c:type:`v4l2_pix_format`.
+    * - __u8
+      - ``hsv_enc``
+      - HSV encoding, from enum :c:type:`v4l2_hsv_encoding`.
+	See struct :c:type:`v4l2_pix_format`.
+    * - }
+      -
+    * - __u8
+      - ``quantization``
+      - Quantization range, from enum :c:type:`v4l2_quantization`.
+	See struct :c:type:`v4l2_pix_format`.
+    * - __u8
+      - ``xfer_func``
+      - Transfer function, from enum :c:type:`v4l2_xfer_func`.
+	See struct :c:type:`v4l2_pix_format`.
+    * - __u8
+      - ``reserved[7]``
+      - Reserved for future extensions. Should be zeroed by drivers and
+	applications.
+
+.. raw:: latex
+
+    \normalsize
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst b/Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst
new file mode 100644
index 000000000..71e828093
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst
@@ -0,0 +1,240 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+******************************
+Single-planar format structure
+******************************
+
+.. tabularcolumns:: |p{4.0cm}|p{2.5cm}|p{11.0cm}|
+
+.. c:type:: v4l2_pix_format
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_pix_format
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``width``
+      - Image width in pixels.
+    * - __u32
+      - ``height``
+      - Image height in pixels. If ``field`` is one of ``V4L2_FIELD_TOP``,
+	``V4L2_FIELD_BOTTOM`` or ``V4L2_FIELD_ALTERNATE`` then height
+	refers to the number of lines in the field, otherwise it refers to
+	the number of lines in the frame (which is twice the field height
+	for interlaced formats).
+    * - :cspan:`2` Applications set these fields to request an image
+	size, drivers return the closest possible values. In case of
+	planar formats the ``width`` and ``height`` applies to the largest
+	plane. To avoid ambiguities drivers must return values rounded up
+	to a multiple of the scale factor of any smaller planes. For
+	example when the image format is YUV 4:2:0, ``width`` and
+	``height`` must be multiples of two.
+
+	For compressed formats that contain the resolution information encoded
+	inside the stream, when fed to a stateful mem2mem decoder, the fields
+	may be zero to rely on the decoder to detect the right values. For more
+	details see :ref:`decoder` and format descriptions.
+
+	For compressed formats on the CAPTURE side of a stateful mem2mem
+	encoder, the fields must be zero, since the coded size is expected to
+	be calculated internally by the encoder itself, based on the OUTPUT
+	side. For more details see :ref:`encoder` and format descriptions.
+    * - __u32
+      - ``pixelformat``
+      - The pixel format or type of compression, set by the application.
+	This is a little endian
+	:ref:`four character code <v4l2-fourcc>`. V4L2 defines standard
+	RGB formats in :ref:`pixfmt-rgb`, YUV formats in
+	:ref:`yuv-formats`, and reserved codes in
+	:ref:`reserved-formats`
+    * - __u32
+      - ``field``
+      - Field order, from enum :c:type:`v4l2_field`.
+        Video images are typically interlaced. Applications can request to
+	capture or output only the top or bottom field, or both fields
+	interlaced or sequentially stored in one buffer or alternating in
+	separate buffers. Drivers return the actual field order selected.
+	For more details on fields see :ref:`field-order`.
+    * - __u32
+      - ``bytesperline``
+      - Distance in bytes between the leftmost pixels in two adjacent
+	lines.
+    * - :cspan:`2`
+
+	Both applications and drivers can set this field to request
+	padding bytes at the end of each line. Drivers however may ignore
+	the value requested by the application, returning ``width`` times
+	bytes per pixel or a larger value required by the hardware. That
+	implies applications can just set this field to zero to get a
+	reasonable default.
+
+	Video hardware may access padding bytes, therefore they must
+	reside in accessible memory. Consider cases where padding bytes
+	after the last line of an image cross a system page boundary.
+	Input devices may write padding bytes, the value is undefined.
+	Output devices ignore the contents of padding bytes.
+
+	When the image format is planar the ``bytesperline`` value applies
+	to the first plane and is divided by the same factor as the
+	``width`` field for the other planes. For example the Cb and Cr
+	planes of a YUV 4:2:0 image have half as many padding bytes
+	following each line as the Y plane. To avoid ambiguities drivers
+	must return a ``bytesperline`` value rounded up to a multiple of
+	the scale factor.
+
+	For compressed formats the ``bytesperline`` value makes no sense.
+	Applications and drivers must set this to 0 in that case.
+    * - __u32
+      - ``sizeimage``
+      - Size in bytes of the buffer to hold a complete image, set by the
+	driver. Usually this is ``bytesperline`` times ``height``. When
+	the image consists of variable length compressed data this is the
+	number of bytes required by the codec to support the worst-case
+	compression scenario.
+
+	The driver will set the value for uncompressed images.
+
+	Clients are allowed to set the sizeimage field for variable length
+	compressed data flagged with ``V4L2_FMT_FLAG_COMPRESSED`` at
+	:ref:`VIDIOC_ENUM_FMT`, but the driver may ignore it and set the
+	value itself, or it may modify the provided value based on
+	alignment requirements or minimum/maximum size requirements.
+	If the client wants to leave this to the driver, then it should
+	set sizeimage to 0.
+    * - __u32
+      - ``colorspace``
+      - Image colorspace, from enum :c:type:`v4l2_colorspace`.
+        This information supplements the ``pixelformat`` and must be set
+	by the driver for capture streams and by the application for
+	output streams, see :ref:`colorspaces`. If the application sets the
+	flag ``V4L2_PIX_FMT_FLAG_SET_CSC`` then the application can set
+	this field for a capture stream to request a specific colorspace
+	for the captured image data. If the driver cannot handle requested
+	conversion, it will return another supported colorspace.
+	The driver indicates that colorspace conversion is supported by setting
+	the flag V4L2_FMT_FLAG_CSC_COLORSPACE in the corresponding struct
+	:c:type:`v4l2_fmtdesc` during enumeration. See :ref:`fmtdesc-flags`.
+    * - __u32
+      - ``priv``
+      - This field indicates whether the remaining fields of the
+	struct :c:type:`v4l2_pix_format`, also called the
+	extended fields, are valid. When set to
+	``V4L2_PIX_FMT_PRIV_MAGIC``, it indicates that the extended fields
+	have been correctly initialized. When set to any other value it
+	indicates that the extended fields contain undefined values.
+
+	Applications that wish to use the pixel format extended fields
+	must first ensure that the feature is supported by querying the
+	device for the :ref:`V4L2_CAP_EXT_PIX_FORMAT <querycap>`
+	capability. If the capability isn't set the pixel format extended
+	fields are not supported and using the extended fields will lead
+	to undefined results.
+
+	To use the extended fields, applications must set the ``priv``
+	field to ``V4L2_PIX_FMT_PRIV_MAGIC``, initialize all the extended
+	fields and zero the unused bytes of the
+	struct :c:type:`v4l2_format` ``raw_data`` field.
+
+	When the ``priv`` field isn't set to ``V4L2_PIX_FMT_PRIV_MAGIC``
+	drivers must act as if all the extended fields were set to zero.
+	On return drivers must set the ``priv`` field to
+	``V4L2_PIX_FMT_PRIV_MAGIC`` and all the extended fields to
+	applicable values.
+    * - __u32
+      - ``flags``
+      - Flags set by the application or driver, see :ref:`format-flags`.
+    * - union {
+      - (anonymous)
+    * - __u32
+      - ``ycbcr_enc``
+      - Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`.
+        This information supplements the ``colorspace`` and must be set by
+	the driver for capture streams and by the application for output
+	streams, see :ref:`colorspaces`. If the application sets the
+	flag ``V4L2_PIX_FMT_FLAG_SET_CSC`` then the application can set
+	this field for a capture stream to request a specific Y'CbCr encoding
+	for the captured image data. If the driver cannot handle requested
+	conversion, it will return another supported encoding.
+	This field is ignored for HSV pixelformats. The driver indicates that
+	ycbcr_enc conversion is supported by setting the flag
+	V4L2_FMT_FLAG_CSC_YCBCR_ENC in the corresponding struct
+	:c:type:`v4l2_fmtdesc` during enumeration. See :ref:`fmtdesc-flags`.
+    * - __u32
+      - ``hsv_enc``
+      - HSV encoding, from enum :c:type:`v4l2_hsv_encoding`.
+        This information supplements the ``colorspace`` and must be set by
+	the driver for capture streams and by the application for output
+	streams, see :ref:`colorspaces`. If the application sets the flag
+	``V4L2_PIX_FMT_FLAG_SET_CSC`` then the application can set this
+	field for a capture stream to request a specific HSV encoding for the
+	captured image data. If the driver cannot handle requested
+	conversion, it will return another supported encoding.
+	This field is ignored for non-HSV pixelformats. The driver indicates
+	that hsv_enc conversion is supported by setting the flag
+	V4L2_FMT_FLAG_CSC_HSV_ENC in the corresponding struct
+	:c:type:`v4l2_fmtdesc` during enumeration. See :ref:`fmtdesc-flags`.
+    * - }
+      -
+    * - __u32
+      - ``quantization``
+      - Quantization range, from enum :c:type:`v4l2_quantization`.
+        This information supplements the ``colorspace`` and must be set by
+	the driver for capture streams and by the application for output
+	streams, see :ref:`colorspaces`. If the application sets the flag
+	``V4L2_PIX_FMT_FLAG_SET_CSC`` then the application can set
+	this field for a capture stream to request a specific quantization
+	range for the captured image data. If the driver cannot handle requested
+	conversion, it will return another supported quantization.
+	The driver indicates that quantization conversion is supported by setting
+	the flag V4L2_FMT_FLAG_CSC_QUANTIZATION in the corresponding struct
+	:c:type:`v4l2_fmtdesc` during enumeration. See :ref:`fmtdesc-flags`.
+    * - __u32
+      - ``xfer_func``
+      - Transfer function, from enum :c:type:`v4l2_xfer_func`.
+        This information supplements the ``colorspace`` and must be set by
+	the driver for capture streams and by the application for output
+	streams, see :ref:`colorspaces`. If the application sets the flag
+	``V4L2_PIX_FMT_FLAG_SET_CSC`` then the application can set
+	this field for a capture stream to request a specific transfer function
+	for the captured image data. If the driver cannot handle requested
+	conversion, it will return another supported transfer function.
+	The driver indicates that xfer_func conversion is supported by setting
+	the flag V4L2_FMT_FLAG_CSC_XFER_FUNC in the corresponding struct
+	:c:type:`v4l2_fmtdesc` during enumeration. See :ref:`fmtdesc-flags`.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _format-flags:
+
+.. flat-table:: Format Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_PIX_FMT_FLAG_PREMUL_ALPHA``
+      - 0x00000001
+      - The color values are premultiplied by the alpha channel value. For
+        example, if a light blue pixel with 50% transparency was described
+	by RGBA values (128, 192, 255, 128), the same pixel described with
+	premultiplied colors would be described by RGBA values (64, 96,
+	128, 128)
+    * .. _`v4l2-pix-fmt-flag-set-csc`:
+
+      - ``V4L2_PIX_FMT_FLAG_SET_CSC``
+      - 0x00000002
+      - Set by the application. It is only used for capture and is
+        ignored for output streams. If set, then request the device to do
+	colorspace conversion from the received colorspace to the requested
+	colorspace values. If the colorimetry field (``colorspace``, ``xfer_func``,
+	``ycbcr_enc``, ``hsv_enc`` or ``quantization``) is set to ``*_DEFAULT``,
+	then that colorimetry setting will remain unchanged from what was received.
+	So in order to change the quantization, only the ``quantization`` field shall
+	be set to non default value (``V4L2_QUANTIZATION_FULL_RANGE`` or
+	``V4L2_QUANTIZATION_LIM_RANGE``) and all other colorimetry fields shall
+	be set to ``*_DEFAULT``.
+
+	To check which conversions are supported by the hardware for the current
+	pixel format, see :ref:`fmtdesc-flags`.
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-vyuy.rst b/Documentation/userspace-api/media/v4l/pixfmt-vyuy.rst
new file mode 100644
index 000000000..aff8588b6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-vyuy.rst
@@ -0,0 +1,108 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-VYUY:
+
+**************************
+V4L2_PIX_FMT_VYUY ('VYUY')
+**************************
+
+
+Variation of ``V4L2_PIX_FMT_YUYV`` with different order of samples in
+memory
+
+
+Description
+===========
+
+In this format each four bytes is two pixels. Each four bytes is two
+Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr
+belong to both pixels. As you can see, the Cr and Cb components have
+half the horizontal resolution of the Y component.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Cr\ :sub:`00`
+      - Y'\ :sub:`00`
+      - Cb\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Cr\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Cb\ :sub:`01`
+      - Y'\ :sub:`03`
+    * - start + 8:
+      - Cr\ :sub:`10`
+      - Y'\ :sub:`10`
+      - Cb\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Cr\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Cb\ :sub:`11`
+      - Y'\ :sub:`13`
+    * - start + 16:
+      - Cr\ :sub:`20`
+      - Y'\ :sub:`20`
+      - Cb\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Cr\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Cb\ :sub:`21`
+      - Y'\ :sub:`23`
+    * - start + 24:
+      - Cr\ :sub:`30`
+      - Y'\ :sub:`30`
+      - Cb\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Cr\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Cb\ :sub:`31`
+      - Y'\ :sub:`33`
+
+
+**Color Sample Location:**
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      -
+      - 2
+      - 3
+    * - 0
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 1
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 2
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 3
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y10.rst b/Documentation/userspace-api/media/v4l/pixfmt-y10.rst
new file mode 100644
index 000000000..05f018dd8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y10.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y10:
+
+*************************
+V4L2_PIX_FMT_Y10 ('Y10 ')
+*************************
+
+
+Grey-scale image
+
+
+Description
+===========
+
+This is a grey-scale image with a depth of 10 bits per pixel. Pixels are
+stored in 16-bit words with unused high bits padded with 0. The least
+significant byte is stored at lower memory addresses (little-endian).
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00low`
+      - Y'\ :sub:`00high`
+      - Y'\ :sub:`01low`
+      - Y'\ :sub:`01high`
+      - Y'\ :sub:`02low`
+      - Y'\ :sub:`02high`
+      - Y'\ :sub:`03low`
+      - Y'\ :sub:`03high`
+    * - start + 8:
+      - Y'\ :sub:`10low`
+      - Y'\ :sub:`10high`
+      - Y'\ :sub:`11low`
+      - Y'\ :sub:`11high`
+      - Y'\ :sub:`12low`
+      - Y'\ :sub:`12high`
+      - Y'\ :sub:`13low`
+      - Y'\ :sub:`13high`
+    * - start + 16:
+      - Y'\ :sub:`20low`
+      - Y'\ :sub:`20high`
+      - Y'\ :sub:`21low`
+      - Y'\ :sub:`21high`
+      - Y'\ :sub:`22low`
+      - Y'\ :sub:`22high`
+      - Y'\ :sub:`23low`
+      - Y'\ :sub:`23high`
+    * - start + 24:
+      - Y'\ :sub:`30low`
+      - Y'\ :sub:`30high`
+      - Y'\ :sub:`31low`
+      - Y'\ :sub:`31high`
+      - Y'\ :sub:`32low`
+      - Y'\ :sub:`32high`
+      - Y'\ :sub:`33low`
+      - Y'\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y10b.rst b/Documentation/userspace-api/media/v4l/pixfmt-y10b.rst
new file mode 100644
index 000000000..38d353b37
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y10b.rst
@@ -0,0 +1,33 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y10BPACK:
+
+******************************
+V4L2_PIX_FMT_Y10BPACK ('Y10B')
+******************************
+
+Grey-scale image as a bit-packed array
+
+
+Description
+===========
+
+This is a packed grey-scale image format with a depth of 10 bits per
+pixel. Pixels are stored in a bit-packed array of 10bit bits per pixel,
+with no padding between them and with the most significant bits coming
+first from the left.
+
+**Bit-packed representation.**
+
+pixels cross the byte boundary and have a ratio of 5 bytes for each 4
+pixels.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Y'\ :sub:`00[9:2]`
+      - Y'\ :sub:`00[1:0]`\ Y'\ :sub:`01[9:4]`
+      - Y'\ :sub:`01[3:0]`\ Y'\ :sub:`02[9:6]`
+      - Y'\ :sub:`02[5:0]`\ Y'\ :sub:`03[9:8]`
+      - Y'\ :sub:`03[7:0]`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y10p.rst b/Documentation/userspace-api/media/v4l/pixfmt-y10p.rst
new file mode 100644
index 000000000..dd20d3438
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y10p.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y10P:
+
+******************************
+V4L2_PIX_FMT_Y10P ('Y10P')
+******************************
+
+Grey-scale image as a MIPI RAW10 packed array
+
+
+Description
+===========
+
+This is a packed grey-scale image format with a depth of 10 bits per
+pixel. Every four consecutive pixels are packed into 5 bytes. Each of
+the first 4 bytes contain the 8 high order bits of the pixels, and
+the 5th byte contains the 2 least significants bits of each pixel,
+in the same order.
+
+**Bit-packed representation.**
+
+.. raw:: latex
+
+    \small
+
+.. tabularcolumns:: |p{1.2cm}||p{1.2cm}||p{1.2cm}||p{1.2cm}|p{3.2cm}|p{3.2cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 8 8 8 8 64
+
+    * - Y'\ :sub:`00[9:2]`
+      - Y'\ :sub:`01[9:2]`
+      - Y'\ :sub:`02[9:2]`
+      - Y'\ :sub:`03[9:2]`
+      - Y'\ :sub:`03[1:0]`\ (bits 7--6) Y'\ :sub:`02[1:0]`\ (bits 5--4)
+	Y'\ :sub:`01[1:0]`\ (bits 3--2) Y'\ :sub:`00[1:0]`\ (bits 1--0)
+
+.. raw:: latex
+
+    \normalsize
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y12.rst b/Documentation/userspace-api/media/v4l/pixfmt-y12.rst
new file mode 100644
index 000000000..20e12a18d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y12.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y12:
+
+*************************
+V4L2_PIX_FMT_Y12 ('Y12 ')
+*************************
+
+
+Grey-scale image
+
+
+Description
+===========
+
+This is a grey-scale image with a depth of 12 bits per pixel. Pixels are
+stored in 16-bit words with unused high bits padded with 0. The least
+significant byte is stored at lower memory addresses (little-endian).
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00low`
+      - Y'\ :sub:`00high`
+      - Y'\ :sub:`01low`
+      - Y'\ :sub:`01high`
+      - Y'\ :sub:`02low`
+      - Y'\ :sub:`02high`
+      - Y'\ :sub:`03low`
+      - Y'\ :sub:`03high`
+    * - start + 8:
+      - Y'\ :sub:`10low`
+      - Y'\ :sub:`10high`
+      - Y'\ :sub:`11low`
+      - Y'\ :sub:`11high`
+      - Y'\ :sub:`12low`
+      - Y'\ :sub:`12high`
+      - Y'\ :sub:`13low`
+      - Y'\ :sub:`13high`
+    * - start + 16:
+      - Y'\ :sub:`20low`
+      - Y'\ :sub:`20high`
+      - Y'\ :sub:`21low`
+      - Y'\ :sub:`21high`
+      - Y'\ :sub:`22low`
+      - Y'\ :sub:`22high`
+      - Y'\ :sub:`23low`
+      - Y'\ :sub:`23high`
+    * - start + 24:
+      - Y'\ :sub:`30low`
+      - Y'\ :sub:`30high`
+      - Y'\ :sub:`31low`
+      - Y'\ :sub:`31high`
+      - Y'\ :sub:`32low`
+      - Y'\ :sub:`32high`
+      - Y'\ :sub:`33low`
+      - Y'\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y12i.rst b/Documentation/userspace-api/media/v4l/pixfmt-y12i.rst
new file mode 100644
index 000000000..d9b539381
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y12i.rst
@@ -0,0 +1,36 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y12I:
+
+**************************
+V4L2_PIX_FMT_Y12I ('Y12I')
+**************************
+
+Interleaved grey-scale image, e.g. from a stereo-pair
+
+
+Description
+===========
+
+This is a grey-scale image with a depth of 12 bits per pixel, but with
+pixels from 2 sources interleaved and bit-packed. Each pixel is stored
+in a 24-bit word in the little-endian order. On a little-endian machine
+these pixels can be deinterlaced using
+
+.. code-block:: c
+
+    __u8 *buf;
+    left0 = 0xfff & *(__u16 *)buf;
+    right0 = *(__u16 *)(buf + 1) >> 4;
+
+**Bit-packed representation.**
+pixels cross the byte boundary and have a ratio of 3 bytes for each
+interleaved pixel.
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Y'\ :sub:`0left[7:0]`
+      - Y'\ :sub:`0right[3:0]`\ Y'\ :sub:`0left[11:8]`
+      - Y'\ :sub:`0right[11:4]`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y14.rst b/Documentation/userspace-api/media/v4l/pixfmt-y14.rst
new file mode 100644
index 000000000..2a4826b77
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y14.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y14:
+
+*************************
+V4L2_PIX_FMT_Y14 ('Y14 ')
+*************************
+
+
+Grey-scale image
+
+
+Description
+===========
+
+This is a grey-scale image with a depth of 14 bits per pixel. Pixels are
+stored in 16-bit words with unused high bits padded with 0. The least
+significant byte is stored at lower memory addresses (little-endian).
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00low`
+      - Y'\ :sub:`00high`
+      - Y'\ :sub:`01low`
+      - Y'\ :sub:`01high`
+      - Y'\ :sub:`02low`
+      - Y'\ :sub:`02high`
+      - Y'\ :sub:`03low`
+      - Y'\ :sub:`03high`
+    * - start + 8:
+      - Y'\ :sub:`10low`
+      - Y'\ :sub:`10high`
+      - Y'\ :sub:`11low`
+      - Y'\ :sub:`11high`
+      - Y'\ :sub:`12low`
+      - Y'\ :sub:`12high`
+      - Y'\ :sub:`13low`
+      - Y'\ :sub:`13high`
+    * - start + 16:
+      - Y'\ :sub:`20low`
+      - Y'\ :sub:`20high`
+      - Y'\ :sub:`21low`
+      - Y'\ :sub:`21high`
+      - Y'\ :sub:`22low`
+      - Y'\ :sub:`22high`
+      - Y'\ :sub:`23low`
+      - Y'\ :sub:`23high`
+    * - start + 24:
+      - Y'\ :sub:`30low`
+      - Y'\ :sub:`30high`
+      - Y'\ :sub:`31low`
+      - Y'\ :sub:`31high`
+      - Y'\ :sub:`32low`
+      - Y'\ :sub:`32high`
+      - Y'\ :sub:`33low`
+      - Y'\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y16-be.rst b/Documentation/userspace-api/media/v4l/pixfmt-y16-be.rst
new file mode 100644
index 000000000..6d70cd78c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y16-be.rst
@@ -0,0 +1,69 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y16-BE:
+
+****************************************
+V4L2_PIX_FMT_Y16_BE ('Y16 ' | (1 << 31))
+****************************************
+
+
+Grey-scale image
+
+
+Description
+===========
+
+This is a grey-scale image with a depth of 16 bits per pixel. The most
+significant byte is stored at lower memory addresses (big-endian).
+
+.. note::
+
+   The actual sampling precision may be lower than 16 bits, for
+   example 10 bits per pixel with values in range 0 to 1023.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00high`
+      - Y'\ :sub:`00low`
+      - Y'\ :sub:`01high`
+      - Y'\ :sub:`01low`
+      - Y'\ :sub:`02high`
+      - Y'\ :sub:`02low`
+      - Y'\ :sub:`03high`
+      - Y'\ :sub:`03low`
+    * - start + 8:
+      - Y'\ :sub:`10high`
+      - Y'\ :sub:`10low`
+      - Y'\ :sub:`11high`
+      - Y'\ :sub:`11low`
+      - Y'\ :sub:`12high`
+      - Y'\ :sub:`12low`
+      - Y'\ :sub:`13high`
+      - Y'\ :sub:`13low`
+    * - start + 16:
+      - Y'\ :sub:`20high`
+      - Y'\ :sub:`20low`
+      - Y'\ :sub:`21high`
+      - Y'\ :sub:`21low`
+      - Y'\ :sub:`22high`
+      - Y'\ :sub:`22low`
+      - Y'\ :sub:`23high`
+      - Y'\ :sub:`23low`
+    * - start + 24:
+      - Y'\ :sub:`30high`
+      - Y'\ :sub:`30low`
+      - Y'\ :sub:`31high`
+      - Y'\ :sub:`31low`
+      - Y'\ :sub:`32high`
+      - Y'\ :sub:`32low`
+      - Y'\ :sub:`33high`
+      - Y'\ :sub:`33low`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y16.rst b/Documentation/userspace-api/media/v4l/pixfmt-y16.rst
new file mode 100644
index 000000000..398ad8ba5
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y16.rst
@@ -0,0 +1,69 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y16:
+
+*************************
+V4L2_PIX_FMT_Y16 ('Y16 ')
+*************************
+
+
+Grey-scale image
+
+
+Description
+===========
+
+This is a grey-scale image with a depth of 16 bits per pixel. The least
+significant byte is stored at lower memory addresses (little-endian).
+
+.. note::
+
+   The actual sampling precision may be lower than 16 bits, for
+   example 10 bits per pixel with values in range 0 to 1023.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00low`
+      - Y'\ :sub:`00high`
+      - Y'\ :sub:`01low`
+      - Y'\ :sub:`01high`
+      - Y'\ :sub:`02low`
+      - Y'\ :sub:`02high`
+      - Y'\ :sub:`03low`
+      - Y'\ :sub:`03high`
+    * - start + 8:
+      - Y'\ :sub:`10low`
+      - Y'\ :sub:`10high`
+      - Y'\ :sub:`11low`
+      - Y'\ :sub:`11high`
+      - Y'\ :sub:`12low`
+      - Y'\ :sub:`12high`
+      - Y'\ :sub:`13low`
+      - Y'\ :sub:`13high`
+    * - start + 16:
+      - Y'\ :sub:`20low`
+      - Y'\ :sub:`20high`
+      - Y'\ :sub:`21low`
+      - Y'\ :sub:`21high`
+      - Y'\ :sub:`22low`
+      - Y'\ :sub:`22high`
+      - Y'\ :sub:`23low`
+      - Y'\ :sub:`23high`
+    * - start + 24:
+      - Y'\ :sub:`30low`
+      - Y'\ :sub:`30high`
+      - Y'\ :sub:`31low`
+      - Y'\ :sub:`31high`
+      - Y'\ :sub:`32low`
+      - Y'\ :sub:`32high`
+      - Y'\ :sub:`33low`
+      - Y'\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y41p.rst b/Documentation/userspace-api/media/v4l/pixfmt-y41p.rst
new file mode 100644
index 000000000..d14cedf8f
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y41p.rst
@@ -0,0 +1,151 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y41P:
+
+**************************
+V4L2_PIX_FMT_Y41P ('Y41P')
+**************************
+
+
+Format with ¼ horizontal chroma resolution, also known as YUV 4:1:1
+
+
+Description
+===========
+
+In this format each 12 bytes is eight pixels. In the twelve bytes are
+two CbCr pairs and eight Y's. The first CbCr pair goes with the first
+four Y's, and the second CbCr pair goes with the other four Y's. The Cb
+and Cr components have one fourth the horizontal resolution of the Y
+component.
+
+Do not confuse this format with
+:ref:`V4L2_PIX_FMT_YUV411P <V4L2-PIX-FMT-YUV411P>`. Y41P is derived
+from "YUV 4:1:1 *packed*", while YUV411P stands for "YUV 4:1:1
+*planar*".
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Cb\ :sub:`00`
+      - Y'\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Cb\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Cr\ :sub:`01`
+      - Y'\ :sub:`03`
+      - Y'\ :sub:`04`
+      - Y'\ :sub:`05`
+      - Y'\ :sub:`06`
+      - Y'\ :sub:`07`
+    * - start + 12:
+      - Cb\ :sub:`10`
+      - Y'\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Cb\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Cr\ :sub:`11`
+      - Y'\ :sub:`13`
+      - Y'\ :sub:`14`
+      - Y'\ :sub:`15`
+      - Y'\ :sub:`16`
+      - Y'\ :sub:`17`
+    * - start + 24:
+      - Cb\ :sub:`20`
+      - Y'\ :sub:`20`
+      - Cr\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Cb\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Cr\ :sub:`21`
+      - Y'\ :sub:`23`
+      - Y'\ :sub:`24`
+      - Y'\ :sub:`25`
+      - Y'\ :sub:`26`
+      - Y'\ :sub:`27`
+    * - start + 36:
+      - Cb\ :sub:`30`
+      - Y'\ :sub:`30`
+      - Cr\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Cb\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Cr\ :sub:`31`
+      - Y'\ :sub:`33`
+      - Y'\ :sub:`34`
+      - Y'\ :sub:`35`
+      - Y'\ :sub:`36`
+      - Y'\ :sub:`37`
+
+
+**Color Sample Location:**
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      - 1
+      -
+      - 2
+      - 3
+      - 4
+      - 5
+      -
+      - 6
+      - 7
+    * - 0
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+    * - 1
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+    * - 2
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+    * - 3
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y8i.rst b/Documentation/userspace-api/media/v4l/pixfmt-y8i.rst
new file mode 100644
index 000000000..770ed4749
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-y8i.rst
@@ -0,0 +1,66 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Y8I:
+
+*************************
+V4L2_PIX_FMT_Y8I ('Y8I ')
+*************************
+
+
+Interleaved grey-scale image, e.g. from a stereo-pair
+
+
+Description
+===========
+
+This is a grey-scale image with a depth of 8 bits per pixel, but with
+pixels from 2 sources interleaved. Each pixel is stored in a 16-bit
+word. E.g. the R200 RealSense camera stores pixel from the left sensor
+in lower and from the right sensor in the higher 8 bits.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00left`
+      - Y'\ :sub:`00right`
+      - Y'\ :sub:`01left`
+      - Y'\ :sub:`01right`
+      - Y'\ :sub:`02left`
+      - Y'\ :sub:`02right`
+      - Y'\ :sub:`03left`
+      - Y'\ :sub:`03right`
+    * - start + 8:
+      - Y'\ :sub:`10left`
+      - Y'\ :sub:`10right`
+      - Y'\ :sub:`11left`
+      - Y'\ :sub:`11right`
+      - Y'\ :sub:`12left`
+      - Y'\ :sub:`12right`
+      - Y'\ :sub:`13left`
+      - Y'\ :sub:`13right`
+    * - start + 16:
+      - Y'\ :sub:`20left`
+      - Y'\ :sub:`20right`
+      - Y'\ :sub:`21left`
+      - Y'\ :sub:`21right`
+      - Y'\ :sub:`22left`
+      - Y'\ :sub:`22right`
+      - Y'\ :sub:`23left`
+      - Y'\ :sub:`23right`
+    * - start + 24:
+      - Y'\ :sub:`30left`
+      - Y'\ :sub:`30right`
+      - Y'\ :sub:`31left`
+      - Y'\ :sub:`31right`
+      - Y'\ :sub:`32left`
+      - Y'\ :sub:`32right`
+      - Y'\ :sub:`33left`
+      - Y'\ :sub:`33right`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv410.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv410.rst
new file mode 100644
index 000000000..de2e519ad
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv410.rst
@@ -0,0 +1,127 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YVU410:
+.. _v4l2-pix-fmt-yuv410:
+
+**********************************************************
+V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9')
+**********************************************************
+
+
+V4L2_PIX_FMT_YUV410
+Planar formats with ¼ horizontal and vertical chroma resolution, also
+known as YUV 4:1:0
+
+
+Description
+===========
+
+These are planar formats, as opposed to a packed format. The three
+components are separated into three sub-images or planes. The Y plane is
+first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_YVU410``,
+the Cr plane immediately follows the Y plane in memory. The Cr plane is
+¼ the width and ¼ the height of the Y plane (and of the image). Each Cr
+belongs to 16 pixels, a four-by-four square of the image. Following the
+Cr plane is the Cb plane, just like the Cr plane.
+``V4L2_PIX_FMT_YUV410`` is the same, except the Cb plane comes first,
+then the Cr plane.
+
+If the Y plane has pad bytes after each row, then the Cr and Cb planes
+have ¼ as many pad bytes after their rows. In other words, four Cx rows
+(including padding) are exactly as long as one Y row (including
+padding).
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 16:
+      - Cr\ :sub:`00`
+    * - start + 17:
+      - Cb\ :sub:`00`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      -
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+    * - 1
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+      -
+      -
+      -
+      - C
+      -
+      -
+      -
+    * - 2
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+    * - 3
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv411p.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv411p.rst
new file mode 100644
index 000000000..998aa9b13
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv411p.rst
@@ -0,0 +1,115 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YUV411P:
+
+*****************************
+V4L2_PIX_FMT_YUV411P ('411P')
+*****************************
+
+
+Format with ¼ horizontal chroma resolution, also known as YUV 4:1:1.
+Planar layout as opposed to ``V4L2_PIX_FMT_Y41P``
+
+
+Description
+===========
+
+This format is not commonly used. This is a planar format similar to the
+4:2:2 planar format except with half as many chroma. The three
+components are separated into three sub-images or planes. The Y plane is
+first. The Y plane has one byte per pixel. The Cb plane immediately
+follows the Y plane in memory. The Cb plane is ¼ the width of the Y
+plane (and of the image). Each Cb belongs to 4 pixels all on the same
+row. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`,
+Y'\ :sub:`02` and Y'\ :sub:`03`. Following the Cb plane is the Cr plane,
+just like the Cb plane.
+
+If the Y plane has pad bytes after each row, then the Cr and Cb planes
+have ¼ as many pad bytes after their rows. In other words, four C x rows
+(including padding) is exactly as long as one Y row (including padding).
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 16:
+      - Cb\ :sub:`00`
+    * - start + 17:
+      - Cb\ :sub:`10`
+    * - start + 18:
+      - Cb\ :sub:`20`
+    * - start + 19:
+      - Cb\ :sub:`30`
+    * - start + 20:
+      - Cr\ :sub:`00`
+    * - start + 21:
+      - Cr\ :sub:`10`
+    * - start + 22:
+      - Cr\ :sub:`20`
+    * - start + 23:
+      - Cr\ :sub:`30`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      - 1
+      -
+      - 2
+      - 3
+    * - 0
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+    * - 1
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+    * - 2
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
+    * - 3
+      - Y
+      - Y
+      - C
+      - Y
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv420.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv420.rst
new file mode 100644
index 000000000..f1c7baf32
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv420.rst
@@ -0,0 +1,143 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YVU420:
+.. _V4L2-PIX-FMT-YUV420:
+
+**********************************************************
+V4L2_PIX_FMT_YVU420 ('YV12'), V4L2_PIX_FMT_YUV420 ('YU12')
+**********************************************************
+
+
+V4L2_PIX_FMT_YUV420
+Planar formats with ½ horizontal and vertical chroma resolution, also
+known as YUV 4:2:0
+
+
+Description
+===========
+
+These are planar formats, as opposed to a packed format. The three
+components are separated into three sub- images or planes. The Y plane
+is first. The Y plane has one byte per pixel. For
+``V4L2_PIX_FMT_YVU420``, the Cr plane immediately follows the Y plane in
+memory. The Cr plane is half the width and half the height of the Y
+plane (and of the image). Each Cr belongs to four pixels, a two-by-two
+square of the image. For example, Cr\ :sub:`0` belongs to Y'\ :sub:`00`,
+Y'\ :sub:`01`, Y'\ :sub:`10`, and Y'\ :sub:`11`. Following the Cr plane
+is the Cb plane, just like the Cr plane. ``V4L2_PIX_FMT_YUV420`` is the
+same except the Cb plane comes first, then the Cr plane.
+
+If the Y plane has pad bytes after each row, then the Cr and Cb planes
+have half as many pad bytes after their rows. In other words, two Cx
+rows (including padding) is exactly as long as one Y row (including
+padding).
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 16:
+      - Cr\ :sub:`00`
+      - Cr\ :sub:`01`
+    * - start + 18:
+      - Cr\ :sub:`10`
+      - Cr\ :sub:`11`
+    * - start + 20:
+      - Cb\ :sub:`00`
+      - Cb\ :sub:`01`
+    * - start + 22:
+      - Cb\ :sub:`10`
+      - Cb\ :sub:`11`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      -
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      -
+      - C
+      -
+    * - 1
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+    * - 2
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      -
+      - C
+      -
+    * - 3
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv420m.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv420m.rst
new file mode 100644
index 000000000..cd20a57e0
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv420m.rst
@@ -0,0 +1,152 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YUV420M:
+.. _v4l2-pix-fmt-yvu420m:
+
+************************************************************
+V4L2_PIX_FMT_YUV420M ('YM12'), V4L2_PIX_FMT_YVU420M ('YM21')
+************************************************************
+
+
+V4L2_PIX_FMT_YVU420M
+Variation of ``V4L2_PIX_FMT_YUV420`` and ``V4L2_PIX_FMT_YVU420`` with
+planes non contiguous in memory.
+
+
+Description
+===========
+
+This is a multi-planar format, as opposed to a packed format. The three
+components are separated into three sub-images or planes.
+
+The Y plane is first. The Y plane has one byte per pixel. For
+``V4L2_PIX_FMT_YUV420M`` the Cb data constitutes the second plane which
+is half the width and half the height of the Y plane (and of the image).
+Each Cb belongs to four pixels, a two-by-two square of the image. For
+example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`,
+Y'\ :sub:`10`, and Y'\ :sub:`11`. The Cr data, just like the Cb plane,
+is in the third plane.
+
+``V4L2_PIX_FMT_YVU420M`` is the same except the Cr data is stored in the
+second plane and the Cb data in the third plane.
+
+If the Y plane has pad bytes after each row, then the Cb and Cr planes
+have half as many pad bytes after their rows. In other words, two Cx
+rows (including padding) is exactly as long as one Y row (including
+padding).
+
+``V4L2_PIX_FMT_YUV420M`` and ``V4L2_PIX_FMT_YVU420M`` are intended to be
+used only in drivers and applications that support the multi-planar API,
+described in :ref:`planar-apis`.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start0 + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start0 + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start0 + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start0 + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * -
+    * - start1 + 0:
+      - Cb\ :sub:`00`
+      - Cb\ :sub:`01`
+    * - start1 + 2:
+      - Cb\ :sub:`10`
+      - Cb\ :sub:`11`
+    * -
+    * - start2 + 0:
+      - Cr\ :sub:`00`
+      - Cr\ :sub:`01`
+    * - start2 + 2:
+      - Cr\ :sub:`10`
+      - Cr\ :sub:`11`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      -
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      -
+      - C
+      -
+    * - 1
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+    * - 2
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
+    * -
+      -
+      - C
+      -
+      -
+      -
+      - C
+      -
+    * - 3
+      - Y
+      -
+      - Y
+      -
+      - Y
+      -
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv422m.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv422m.rst
new file mode 100644
index 000000000..32bf15e14
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv422m.rst
@@ -0,0 +1,141 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YUV422M:
+.. _v4l2-pix-fmt-yvu422m:
+
+************************************************************
+V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61')
+************************************************************
+
+
+V4L2_PIX_FMT_YVU422M
+Planar formats with ½ horizontal resolution, also known as YUV and YVU
+4:2:2
+
+
+Description
+===========
+
+This is a multi-planar format, as opposed to a packed format. The three
+components are separated into three sub-images or planes.
+
+The Y plane is first. The Y plane has one byte per pixel. For
+``V4L2_PIX_FMT_YUV422M`` the Cb data constitutes the second plane which
+is half the width of the Y plane (and of the image). Each Cb belongs to
+two pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`,
+Y'\ :sub:`01`. The Cr data, just like the Cb plane, is in the third
+plane.
+
+``V4L2_PIX_FMT_YVU422M`` is the same except the Cr data is stored in the
+second plane and the Cb data in the third plane.
+
+If the Y plane has pad bytes after each row, then the Cb and Cr planes
+have half as many pad bytes after their rows. In other words, two Cx
+rows (including padding) is exactly as long as one Y row (including
+padding).
+
+``V4L2_PIX_FMT_YUV422M`` and ``V4L2_PIX_FMT_YVU422M`` are intended to be
+used only in drivers and applications that support the multi-planar API,
+described in :ref:`planar-apis`.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start0 + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start0 + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start0 + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start0 + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * -
+    * - start1 + 0:
+      - Cb\ :sub:`00`
+      - Cb\ :sub:`01`
+    * - start1 + 2:
+      - Cb\ :sub:`10`
+      - Cb\ :sub:`11`
+    * - start1 + 4:
+      - Cb\ :sub:`20`
+      - Cb\ :sub:`21`
+    * - start1 + 6:
+      - Cb\ :sub:`30`
+      - Cb\ :sub:`31`
+    * -
+    * - start2 + 0:
+      - Cr\ :sub:`00`
+      - Cr\ :sub:`01`
+    * - start2 + 2:
+      - Cr\ :sub:`10`
+      - Cr\ :sub:`11`
+    * - start2 + 4:
+      - Cr\ :sub:`20`
+      - Cr\ :sub:`21`
+    * - start2 + 6:
+      - Cr\ :sub:`30`
+      - Cr\ :sub:`31`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 1
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 2
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 3
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv422p.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv422p.rst
new file mode 100644
index 000000000..b178be558
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv422p.rst
@@ -0,0 +1,129 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YUV422P:
+
+*****************************
+V4L2_PIX_FMT_YUV422P ('422P')
+*****************************
+
+
+Format with ½ horizontal chroma resolution, also known as YUV 4:2:2.
+Planar layout as opposed to ``V4L2_PIX_FMT_YUYV``
+
+
+Description
+===========
+
+This format is not commonly used. This is a planar version of the YUYV
+format. The three components are separated into three sub-images or
+planes. The Y plane is first. The Y plane has one byte per pixel. The Cb
+plane immediately follows the Y plane in memory. The Cb plane is half
+the width of the Y plane (and of the image). Each Cb belongs to two
+pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`,
+Y'\ :sub:`01`. Following the Cb plane is the Cr plane, just like the Cb
+plane.
+
+If the Y plane has pad bytes after each row, then the Cr and Cb planes
+have half as many pad bytes after their rows. In other words, two Cx
+rows (including padding) is exactly as long as one Y row (including
+padding).
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * - start + 16:
+      - Cb\ :sub:`00`
+      - Cb\ :sub:`01`
+    * - start + 18:
+      - Cb\ :sub:`10`
+      - Cb\ :sub:`11`
+    * - start + 20:
+      - Cb\ :sub:`20`
+      - Cb\ :sub:`21`
+    * - start + 22:
+      - Cb\ :sub:`30`
+      - Cb\ :sub:`31`
+    * - start + 24:
+      - Cr\ :sub:`00`
+      - Cr\ :sub:`01`
+    * - start + 26:
+      - Cr\ :sub:`10`
+      - Cr\ :sub:`11`
+    * - start + 28:
+      - Cr\ :sub:`20`
+      - Cr\ :sub:`21`
+    * - start + 30:
+      - Cr\ :sub:`30`
+      - Cr\ :sub:`31`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 1
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 2
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 3
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv444m.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv444m.rst
new file mode 100644
index 000000000..90bdee2e2
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv444m.rst
@@ -0,0 +1,141 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YUV444M:
+.. _v4l2-pix-fmt-yvu444m:
+
+************************************************************
+V4L2_PIX_FMT_YUV444M ('YM24'), V4L2_PIX_FMT_YVU444M ('YM42')
+************************************************************
+
+
+V4L2_PIX_FMT_YVU444M
+Planar formats with full horizontal resolution, also known as YUV and
+YVU 4:4:4
+
+
+Description
+===========
+
+This is a multi-planar format, as opposed to a packed format. The three
+components are separated into three sub-images or planes.
+
+The Y plane is first. The Y plane has one byte per pixel. For
+``V4L2_PIX_FMT_YUV444M`` the Cb data constitutes the second plane which
+is the same width and height as the Y plane (and as the image). The Cr
+data, just like the Cb plane, is in the third plane.
+
+``V4L2_PIX_FMT_YVU444M`` is the same except the Cr data is stored in the
+second plane and the Cb data in the third plane.
+
+If the Y plane has pad bytes after each row, then the Cb and Cr planes
+have the same number of pad bytes after their rows.
+
+``V4L2_PIX_FMT_YUV444M`` and ``V4L2_PIX_FMT_YUV444M`` are intended to be
+used only in drivers and applications that support the multi-planar API,
+described in :ref:`planar-apis`.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start0 + 0:
+      - Y'\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Y'\ :sub:`02`
+      - Y'\ :sub:`03`
+    * - start0 + 4:
+      - Y'\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Y'\ :sub:`12`
+      - Y'\ :sub:`13`
+    * - start0 + 8:
+      - Y'\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Y'\ :sub:`22`
+      - Y'\ :sub:`23`
+    * - start0 + 12:
+      - Y'\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Y'\ :sub:`32`
+      - Y'\ :sub:`33`
+    * -
+    * - start1 + 0:
+      - Cb\ :sub:`00`
+      - Cb\ :sub:`01`
+      - Cb\ :sub:`02`
+      - Cb\ :sub:`03`
+    * - start1 + 4:
+      - Cb\ :sub:`10`
+      - Cb\ :sub:`11`
+      - Cb\ :sub:`12`
+      - Cb\ :sub:`13`
+    * - start1 + 8:
+      - Cb\ :sub:`20`
+      - Cb\ :sub:`21`
+      - Cb\ :sub:`22`
+      - Cb\ :sub:`23`
+    * - start1 + 12:
+      - Cb\ :sub:`20`
+      - Cb\ :sub:`21`
+      - Cb\ :sub:`32`
+      - Cb\ :sub:`33`
+    * -
+    * - start2 + 0:
+      - Cr\ :sub:`00`
+      - Cr\ :sub:`01`
+      - Cr\ :sub:`02`
+      - Cr\ :sub:`03`
+    * - start2 + 4:
+      - Cr\ :sub:`10`
+      - Cr\ :sub:`11`
+      - Cr\ :sub:`12`
+      - Cr\ :sub:`13`
+    * - start2 + 8:
+      - Cr\ :sub:`20`
+      - Cr\ :sub:`21`
+      - Cr\ :sub:`22`
+      - Cr\ :sub:`23`
+    * - start2 + 12:
+      - Cr\ :sub:`30`
+      - Cr\ :sub:`31`
+      - Cr\ :sub:`32`
+      - Cr\ :sub:`33`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      - 1
+      - 2
+      - 3
+    * - 0
+      - YC
+      - YC
+      - YC
+      - YC
+    * - 1
+      - YC
+      - YC
+      - YC
+      - YC
+    * - 2
+      - YC
+      - YC
+      - YC
+      - YC
+    * - 3
+      - YC
+      - YC
+      - YC
+      - YC
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuyv.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuyv.rst
new file mode 100644
index 000000000..ca073a509
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuyv.rst
@@ -0,0 +1,118 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YUYV:
+
+**************************
+V4L2_PIX_FMT_YUYV ('YUYV')
+**************************
+
+
+Packed format with ½ horizontal chroma resolution, also known as YUV
+4:2:2
+
+
+Description
+===========
+
+In this format each four bytes is two pixels. Each four bytes is two
+Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr
+belong to both pixels. As you can see, the Cr and Cb components have
+half the horizontal resolution of the Y component. ``V4L2_PIX_FMT_YUYV``
+is known in the Windows environment as YUY2.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Cb\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Cr\ :sub:`00`
+      - Y'\ :sub:`02`
+      - Cb\ :sub:`01`
+      - Y'\ :sub:`03`
+      - Cr\ :sub:`01`
+    * - start + 8:
+      - Y'\ :sub:`10`
+      - Cb\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Cr\ :sub:`10`
+      - Y'\ :sub:`12`
+      - Cb\ :sub:`11`
+      - Y'\ :sub:`13`
+      - Cr\ :sub:`11`
+    * - start + 16:
+      - Y'\ :sub:`20`
+      - Cb\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Cr\ :sub:`20`
+      - Y'\ :sub:`22`
+      - Cb\ :sub:`21`
+      - Y'\ :sub:`23`
+      - Cr\ :sub:`21`
+    * - start + 24:
+      - Y'\ :sub:`30`
+      - Cb\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Cr\ :sub:`30`
+      - Y'\ :sub:`32`
+      - Cb\ :sub:`31`
+      - Y'\ :sub:`33`
+      - Cr\ :sub:`31`
+
+
+**Color Sample Location:**
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      -
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      - C
+      - Y
+      -
+      - Y
+      - C
+      - Y
+    * - 1
+      - Y
+      - C
+      - Y
+      -
+      - Y
+      - C
+      - Y
+    * - 2
+      - Y
+      - C
+      - Y
+      -
+      - Y
+      - C
+      - Y
+    * - 3
+      - Y
+      - C
+      - Y
+      -
+      - Y
+      - C
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yvyu.rst b/Documentation/userspace-api/media/v4l/pixfmt-yvyu.rst
new file mode 100644
index 000000000..81ebec525
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yvyu.rst
@@ -0,0 +1,108 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-YVYU:
+
+**************************
+V4L2_PIX_FMT_YVYU ('YVYU')
+**************************
+
+
+Variation of ``V4L2_PIX_FMT_YUYV`` with different order of samples in
+memory
+
+
+Description
+===========
+
+In this format each four bytes is two pixels. Each four bytes is two
+Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr
+belong to both pixels. As you can see, the Cr and Cb components have
+half the horizontal resolution of the Y component.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Y'\ :sub:`00`
+      - Cr\ :sub:`00`
+      - Y'\ :sub:`01`
+      - Cb\ :sub:`00`
+      - Y'\ :sub:`02`
+      - Cr\ :sub:`01`
+      - Y'\ :sub:`03`
+      - Cb\ :sub:`01`
+    * - start + 8:
+      - Y'\ :sub:`10`
+      - Cr\ :sub:`10`
+      - Y'\ :sub:`11`
+      - Cb\ :sub:`10`
+      - Y'\ :sub:`12`
+      - Cr\ :sub:`11`
+      - Y'\ :sub:`13`
+      - Cb\ :sub:`11`
+    * - start + 16:
+      - Y'\ :sub:`20`
+      - Cr\ :sub:`20`
+      - Y'\ :sub:`21`
+      - Cb\ :sub:`20`
+      - Y'\ :sub:`22`
+      - Cr\ :sub:`21`
+      - Y'\ :sub:`23`
+      - Cb\ :sub:`21`
+    * - start + 24:
+      - Y'\ :sub:`30`
+      - Cr\ :sub:`30`
+      - Y'\ :sub:`31`
+      - Cb\ :sub:`30`
+      - Y'\ :sub:`32`
+      - Cr\ :sub:`31`
+      - Y'\ :sub:`33`
+      - Cb\ :sub:`31`
+
+
+**Color Sample Location:**
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * -
+      - 0
+      -
+      - 1
+      - 2
+      -
+      - 3
+    * - 0
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 1
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 2
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
+    * - 3
+      - Y
+      - C
+      - Y
+      - Y
+      - C
+      - Y
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-z16.rst b/Documentation/userspace-api/media/v4l/pixfmt-z16.rst
new file mode 100644
index 000000000..54a8cd723
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt-z16.rst
@@ -0,0 +1,66 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _V4L2-PIX-FMT-Z16:
+
+*************************
+V4L2_PIX_FMT_Z16 ('Z16 ')
+*************************
+
+
+16-bit depth data with distance values at each pixel
+
+
+Description
+===========
+
+This is a 16-bit format, representing depth data. Each pixel is a
+distance to the respective point in the image coordinates. Distance unit
+can vary and has to be negotiated with the device separately. Each pixel
+is stored in a 16-bit word in the little endian byte order.
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - start + 0:
+      - Z\ :sub:`00low`
+      - Z\ :sub:`00high`
+      - Z\ :sub:`01low`
+      - Z\ :sub:`01high`
+      - Z\ :sub:`02low`
+      - Z\ :sub:`02high`
+      - Z\ :sub:`03low`
+      - Z\ :sub:`03high`
+    * - start + 8:
+      - Z\ :sub:`10low`
+      - Z\ :sub:`10high`
+      - Z\ :sub:`11low`
+      - Z\ :sub:`11high`
+      - Z\ :sub:`12low`
+      - Z\ :sub:`12high`
+      - Z\ :sub:`13low`
+      - Z\ :sub:`13high`
+    * - start + 16:
+      - Z\ :sub:`20low`
+      - Z\ :sub:`20high`
+      - Z\ :sub:`21low`
+      - Z\ :sub:`21high`
+      - Z\ :sub:`22low`
+      - Z\ :sub:`22high`
+      - Z\ :sub:`23low`
+      - Z\ :sub:`23high`
+    * - start + 24:
+      - Z\ :sub:`30low`
+      - Z\ :sub:`30high`
+      - Z\ :sub:`31low`
+      - Z\ :sub:`31high`
+      - Z\ :sub:`32low`
+      - Z\ :sub:`32high`
+      - Z\ :sub:`33low`
+      - Z\ :sub:`33high`
diff --git a/Documentation/userspace-api/media/v4l/pixfmt.rst b/Documentation/userspace-api/media/v4l/pixfmt.rst
new file mode 100644
index 000000000..11dab4a90
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/pixfmt.rst
@@ -0,0 +1,38 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _pixfmt:
+
+#############
+Image Formats
+#############
+The V4L2 API was primarily designed for devices exchanging image data
+with applications. The struct :c:type:`v4l2_pix_format` and
+struct :c:type:`v4l2_pix_format_mplane` structures define the
+format and layout of an image in memory. The former is used with the
+single-planar API, while the latter is used with the multi-planar
+version (see :ref:`planar-apis`). Image formats are negotiated with
+the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. (The explanations here
+focus on video capturing and output, for overlay frame buffer formats
+see also :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`.)
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-v4l2
+    pixfmt-v4l2-mplane
+    pixfmt-intro
+    pixfmt-indexed
+    pixfmt-rgb
+    pixfmt-bayer
+    yuv-formats
+    hsv-formats
+    depth-formats
+    pixfmt-compressed
+    sdr-formats
+    tch-formats
+    meta-formats
+    pixfmt-reserved
+    colorspaces
+    colorspaces-defs
+    colorspaces-details
diff --git a/Documentation/userspace-api/media/v4l/planar-apis.rst b/Documentation/userspace-api/media/v4l/planar-apis.rst
new file mode 100644
index 000000000..9207ce428
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/planar-apis.rst
@@ -0,0 +1,61 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _planar-apis:
+
+*****************************
+Single- and multi-planar APIs
+*****************************
+
+Some devices require data for each input or output video frame to be
+placed in discontiguous memory buffers. In such cases, one video frame
+has to be addressed using more than one memory address, i.e. one pointer
+per "plane". A plane is a sub-buffer of the current frame. For examples
+of such formats see :ref:`pixfmt`.
+
+Initially, V4L2 API did not support multi-planar buffers and a set of
+extensions has been introduced to handle them. Those extensions
+constitute what is being referred to as the "multi-planar API".
+
+Some of the V4L2 API calls and structures are interpreted differently,
+depending on whether single- or multi-planar API is being used. An
+application can choose whether to use one or the other by passing a
+corresponding buffer type to its ioctl calls. Multi-planar versions of
+buffer types are suffixed with an ``_MPLANE`` string. For a list of
+available multi-planar buffer types see enum
+:c:type:`v4l2_buf_type`.
+
+
+Multi-planar formats
+====================
+
+Multi-planar API introduces new multi-planar formats. Those formats use
+a separate set of FourCC codes. It is important to distinguish between
+the multi-planar API and a multi-planar format. Multi-planar API calls
+can handle all single-planar formats as well (as long as they are passed
+in multi-planar API structures), while the single-planar API cannot
+handle multi-planar formats.
+
+
+Calls that distinguish between single and multi-planar APIs
+===========================================================
+
+:ref:`VIDIOC_QUERYCAP <VIDIOC_QUERYCAP>`
+    Two additional multi-planar capabilities are added. They can be set
+    together with non-multi-planar ones for devices that handle both
+    single- and multi-planar formats.
+
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`, :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>`
+    New structures for describing multi-planar formats are added: struct
+    :c:type:`v4l2_pix_format_mplane` and
+    struct :c:type:`v4l2_plane_pix_format`.
+    Drivers may define new multi-planar formats, which have distinct
+    FourCC codes from the existing single-planar ones.
+
+:ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_QUERYBUF <VIDIOC_QUERYBUF>`
+    A new struct :c:type:`v4l2_plane` structure for
+    describing planes is added. Arrays of this structure are passed in
+    the new ``m.planes`` field of struct
+    :c:type:`v4l2_buffer`.
+
+:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`
+    Will allocate multi-planar buffers as requested.
diff --git a/Documentation/userspace-api/media/v4l/querycap.rst b/Documentation/userspace-api/media/v4l/querycap.rst
new file mode 100644
index 000000000..15a90271a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/querycap.rst
@@ -0,0 +1,34 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _querycap:
+
+*********************
+Querying Capabilities
+*********************
+
+Because V4L2 covers a wide variety of devices not all aspects of the API
+are equally applicable to all types of devices. Furthermore devices of
+the same type have different capabilities and this specification permits
+the omission of a few complicated and less important parts of the API.
+
+The :ref:`VIDIOC_QUERYCAP` ioctl is available to
+check if the kernel device is compatible with this specification, and to
+query the :ref:`functions <devices>` and :ref:`I/O methods <io>`
+supported by the device.
+
+Starting with kernel version 3.1, :ref:`VIDIOC_QUERYCAP`
+will return the V4L2 API version used by the driver, with generally
+matches the Kernel version. There's no need of using
+:ref:`VIDIOC_QUERYCAP` to check if a specific ioctl
+is supported, the V4L2 core now returns ``ENOTTY`` if a driver doesn't
+provide support for an ioctl.
+
+Other features can be queried by calling the respective ioctl, for
+example :ref:`VIDIOC_ENUMINPUT` to learn about the
+number, types and names of video connectors on the device. Although
+abstraction is a major objective of this API, the
+:ref:`VIDIOC_QUERYCAP` ioctl also allows driver
+specific applications to reliably identify the driver.
+
+All V4L2 drivers must support :ref:`VIDIOC_QUERYCAP`.
+Applications should always call this ioctl after opening the device.
diff --git a/Documentation/userspace-api/media/v4l/rw.rst b/Documentation/userspace-api/media/v4l/rw.rst
new file mode 100644
index 000000000..64b85fb2a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/rw.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _rw:
+
+**********
+Read/Write
+**********
+
+Input and output devices support the :c:func:`read()` and
+:c:func:`write()` function, respectively, when the
+``V4L2_CAP_READWRITE`` flag in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl is set.
+
+Drivers may need the CPU to copy the data, but they may also support DMA
+to or from user memory, so this I/O method is not necessarily less
+efficient than other methods merely exchanging buffer pointers. It is
+considered inferior though because no meta-information like frame
+counters or timestamps are passed. This information is necessary to
+recognize frame dropping and to synchronize with other data streams.
+However this is also the simplest I/O method, requiring little or no
+setup to exchange data. It permits command line stunts like this (the
+vidctrl tool is fictitious):
+
+.. code-block:: none
+
+    $ vidctrl /dev/video --input=0 --format=YUYV --size=352x288
+    $ dd if=/dev/video of=myimage.422 bs=202752 count=1
+
+To read from the device applications use the :c:func:`read()`
+function, to write the :c:func:`write()` function. Drivers
+must implement one I/O method if they exchange data with applications,
+but it need not be this. [#f1]_ When reading or writing is supported, the
+driver must also support the :c:func:`select()` and
+:c:func:`poll()` function. [#f2]_
+
+.. [#f1]
+   It would be desirable if applications could depend on drivers
+   supporting all I/O interfaces, but as much as the complex memory
+   mapping I/O can be inadequate for some devices we have no reason to
+   require this interface, which is most useful for simple applications
+   capturing still images.
+
+.. [#f2]
+   At the driver level :c:func:`select()` and :c:func:`poll()` are
+   the same, and :c:func:`select()` is too important to be optional.
diff --git a/Documentation/userspace-api/media/v4l/sdr-formats.rst b/Documentation/userspace-api/media/v4l/sdr-formats.rst
new file mode 100644
index 000000000..d8bdfdb56
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/sdr-formats.rst
@@ -0,0 +1,22 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _sdr-formats:
+
+***********
+SDR Formats
+***********
+
+These formats are used for :ref:`SDR <sdr>` interface only.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-sdr-cu08
+    pixfmt-sdr-cu16le
+    pixfmt-sdr-cs08
+    pixfmt-sdr-cs14le
+    pixfmt-sdr-ru12le
+    pixfmt-sdr-pcu16be
+    pixfmt-sdr-pcu18be
+    pixfmt-sdr-pcu20be
diff --git a/Documentation/userspace-api/media/v4l/selection-api-configuration.rst b/Documentation/userspace-api/media/v4l/selection-api-configuration.rst
new file mode 100644
index 000000000..37617eda2
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/selection-api-configuration.rst
@@ -0,0 +1,137 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+*************
+Configuration
+*************
+
+Applications can use the :ref:`selection API <VIDIOC_G_SELECTION>` to
+select an area in a video signal or a buffer, and to query for default
+settings and hardware limits.
+
+Video hardware can have various cropping, composing and scaling
+limitations. It may only scale up or down, support only discrete scaling
+factors, or have different scaling abilities in the horizontal and
+vertical directions. Also it may not support scaling at all. At the same
+time the cropping/composing rectangles may have to be aligned, and both
+the source and the sink may have arbitrary upper and lower size limits.
+Therefore, as usual, drivers are expected to adjust the requested
+parameters and return the actual values selected. An application can
+control the rounding behaviour using
+:ref:`constraint flags <v4l2-selection-flags>`.
+
+
+Configuration of video capture
+==============================
+
+See figure :ref:`sel-targets-capture` for examples of the selection
+targets available for a video capture device. It is recommended to
+configure the cropping targets before to the composing targets.
+
+The range of coordinates of the top left corner, width and height of
+areas that can be sampled is given by the ``V4L2_SEL_TGT_CROP_BOUNDS``
+target. It is recommended for the driver developers to put the top/left
+corner at position ``(0,0)``. The rectangle's coordinates are expressed
+in pixels.
+
+The top left corner, width and height of the source rectangle, that is
+the area actually sampled, is given by the ``V4L2_SEL_TGT_CROP`` target.
+It uses the same coordinate system as ``V4L2_SEL_TGT_CROP_BOUNDS``. The
+active cropping area must lie completely inside the capture boundaries.
+The driver may further adjust the requested size and/or position
+according to hardware limitations.
+
+Each capture device has a default source rectangle, given by the
+``V4L2_SEL_TGT_CROP_DEFAULT`` target. This rectangle shall cover what the
+driver writer considers the complete picture. Drivers shall set the
+active crop rectangle to the default when the driver is first loaded,
+but not later.
+
+The composing targets refer to a memory buffer. The limits of composing
+coordinates are obtained using ``V4L2_SEL_TGT_COMPOSE_BOUNDS``. All
+coordinates are expressed in pixels. The rectangle's top/left corner
+must be located at position ``(0,0)``. The width and height are equal to
+the image size set by :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`.
+
+The part of a buffer into which the image is inserted by the hardware is
+controlled by the ``V4L2_SEL_TGT_COMPOSE`` target. The rectangle's
+coordinates are also expressed in the same coordinate system as the
+bounds rectangle. The composing rectangle must lie completely inside
+bounds rectangle. The driver must adjust the composing rectangle to fit
+to the bounding limits. Moreover, the driver can perform other
+adjustments according to hardware limitations. The application can
+control rounding behaviour using
+:ref:`constraint flags <v4l2-selection-flags>`.
+
+For capture devices the default composing rectangle is queried using
+``V4L2_SEL_TGT_COMPOSE_DEFAULT``. It is usually equal to the bounding
+rectangle.
+
+The part of a buffer that is modified by the hardware is given by
+``V4L2_SEL_TGT_COMPOSE_PADDED``. It contains all pixels defined using
+``V4L2_SEL_TGT_COMPOSE`` plus all padding data modified by hardware
+during insertion process. All pixels outside this rectangle *must not*
+be changed by the hardware. The content of pixels that lie inside the
+padded area but outside active area is undefined. The application can
+use the padded and active rectangles to detect where the rubbish pixels
+are located and remove them if needed.
+
+
+Configuration of video output
+=============================
+
+For output devices targets and ioctls are used similarly to the video
+capture case. The *composing* rectangle refers to the insertion of an
+image into a video signal. The cropping rectangles refer to a memory
+buffer. It is recommended to configure the composing targets before to
+the cropping targets.
+
+The cropping targets refer to the memory buffer that contains an image
+to be inserted into a video signal or graphical screen. The limits of
+cropping coordinates are obtained using ``V4L2_SEL_TGT_CROP_BOUNDS``.
+All coordinates are expressed in pixels. The top/left corner is always
+point ``(0,0)``. The width and height is equal to the image size
+specified using :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl.
+
+The top left corner, width and height of the source rectangle, that is
+the area from which image date are processed by the hardware, is given
+by the ``V4L2_SEL_TGT_CROP``. Its coordinates are expressed in in the
+same coordinate system as the bounds rectangle. The active cropping area
+must lie completely inside the crop boundaries and the driver may
+further adjust the requested size and/or position according to hardware
+limitations.
+
+For output devices the default cropping rectangle is queried using
+``V4L2_SEL_TGT_CROP_DEFAULT``. It is usually equal to the bounding
+rectangle.
+
+The part of a video signal or graphics display where the image is
+inserted by the hardware is controlled by ``V4L2_SEL_TGT_COMPOSE``
+target. The rectangle's coordinates are expressed in pixels. The
+composing rectangle must lie completely inside the bounds rectangle. The
+driver must adjust the area to fit to the bounding limits. Moreover, the
+driver can perform other adjustments according to hardware limitations.
+
+The device has a default composing rectangle, given by the
+``V4L2_SEL_TGT_COMPOSE_DEFAULT`` target. This rectangle shall cover what
+the driver writer considers the complete picture. It is recommended for
+the driver developers to put the top/left corner at position ``(0,0)``.
+Drivers shall set the active composing rectangle to the default one when
+the driver is first loaded.
+
+The devices may introduce additional content to video signal other than
+an image from memory buffers. It includes borders around an image.
+However, such a padded area is driver-dependent feature not covered by
+this document. Driver developers are encouraged to keep padded rectangle
+equal to active one. The padded target is accessed by the
+``V4L2_SEL_TGT_COMPOSE_PADDED`` identifier. It must contain all pixels
+from the ``V4L2_SEL_TGT_COMPOSE`` target.
+
+
+Scaling control
+===============
+
+An application can detect if scaling is performed by comparing the width
+and the height of rectangles obtained using ``V4L2_SEL_TGT_CROP`` and
+``V4L2_SEL_TGT_COMPOSE`` targets. If these are not equal then the
+scaling is applied. The application can compute the scaling ratios using
+these values.
diff --git a/Documentation/userspace-api/media/v4l/selection-api-examples.rst b/Documentation/userspace-api/media/v4l/selection-api-examples.rst
new file mode 100644
index 000000000..5f8e8a1f5
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/selection-api-examples.rst
@@ -0,0 +1,84 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+********
+Examples
+********
+
+(A video capture device is assumed; change
+``V4L2_BUF_TYPE_VIDEO_CAPTURE`` for other devices; change target to
+``V4L2_SEL_TGT_COMPOSE_*`` family to configure composing area)
+
+Example: Resetting the cropping parameters
+==========================================
+
+.. code-block:: c
+
+	struct v4l2_selection sel = {
+	    .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+	    .target = V4L2_SEL_TGT_CROP_DEFAULT,
+	};
+	ret = ioctl(fd, VIDIOC_G_SELECTION, &sel);
+	if (ret)
+	    exit(-1);
+	sel.target = V4L2_SEL_TGT_CROP;
+	ret = ioctl(fd, VIDIOC_S_SELECTION, &sel);
+	if (ret)
+	    exit(-1);
+
+Setting a composing area on output of size of *at most* half of limit
+placed at a center of a display.
+
+Example: Simple downscaling
+===========================
+
+.. code-block:: c
+
+	struct v4l2_selection sel = {
+	    .type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
+	    .target = V4L2_SEL_TGT_COMPOSE_BOUNDS,
+	};
+	struct v4l2_rect r;
+
+	ret = ioctl(fd, VIDIOC_G_SELECTION, &sel);
+	if (ret)
+	    exit(-1);
+	/* setting smaller compose rectangle */
+	r.width = sel.r.width / 2;
+	r.height = sel.r.height / 2;
+	r.left = sel.r.width / 4;
+	r.top = sel.r.height / 4;
+	sel.r = r;
+	sel.target = V4L2_SEL_TGT_COMPOSE;
+	sel.flags = V4L2_SEL_FLAG_LE;
+	ret = ioctl(fd, VIDIOC_S_SELECTION, &sel);
+	if (ret)
+	    exit(-1);
+
+A video output device is assumed; change ``V4L2_BUF_TYPE_VIDEO_OUTPUT``
+for other devices
+
+Example: Querying for scaling factors
+=====================================
+
+.. code-block:: c
+
+	struct v4l2_selection compose = {
+	    .type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
+	    .target = V4L2_SEL_TGT_COMPOSE,
+	};
+	struct v4l2_selection crop = {
+	    .type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
+	    .target = V4L2_SEL_TGT_CROP,
+	};
+	double hscale, vscale;
+
+	ret = ioctl(fd, VIDIOC_G_SELECTION, &compose);
+	if (ret)
+	    exit(-1);
+	ret = ioctl(fd, VIDIOC_G_SELECTION, &crop);
+	if (ret)
+	    exit(-1);
+
+	/* computing scaling factors */
+	hscale = (double)compose.r.width / crop.r.width;
+	vscale = (double)compose.r.height / crop.r.height;
diff --git a/Documentation/userspace-api/media/v4l/selection-api-intro.rst b/Documentation/userspace-api/media/v4l/selection-api-intro.rst
new file mode 100644
index 000000000..6534854ae
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/selection-api-intro.rst
@@ -0,0 +1,28 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+************
+Introduction
+************
+
+Some video capture devices can sample a subsection of a picture and
+shrink or enlarge it to an image of arbitrary size. Next, the devices
+can insert the image into larger one. Some video output devices can crop
+part of an input image, scale it up or down and insert it at an
+arbitrary scan line and horizontal offset into a video signal. We call
+these abilities cropping, scaling and composing.
+
+On a video *capture* device the source is a video signal, and the
+cropping target determine the area actually sampled. The sink is an
+image stored in a memory buffer. The composing area specifies which part
+of the buffer is actually written to by the hardware.
+
+On a video *output* device the source is an image in a memory buffer,
+and the cropping target is a part of an image to be shown on a display.
+The sink is the display or the graphics screen. The application may
+select the part of display where the image should be displayed. The size
+and position of such a window is controlled by the compose target.
+
+Rectangles for all cropping and composing targets are defined even if
+the device does supports neither cropping nor composing. Their size and
+position will be fixed in such a case. If the device does not support
+scaling then the cropping and composing rectangles have the same size.
diff --git a/Documentation/userspace-api/media/v4l/selection-api-targets.rst b/Documentation/userspace-api/media/v4l/selection-api-targets.rst
new file mode 100644
index 000000000..50fdadd5b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/selection-api-targets.rst
@@ -0,0 +1,20 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+*****************
+Selection targets
+*****************
+
+
+.. _sel-targets-capture:
+
+.. kernel-figure:: selection.svg
+    :alt:   selection.svg
+    :align: center
+
+    Cropping and composing targets
+
+    Targets used by a cropping, composing and scaling process
+
+
+
+See :ref:`v4l2-selection-targets` for more information.
diff --git a/Documentation/userspace-api/media/v4l/selection-api-vs-crop-api.rst b/Documentation/userspace-api/media/v4l/selection-api-vs-crop-api.rst
new file mode 100644
index 000000000..f57b91800
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/selection-api-vs-crop-api.rst
@@ -0,0 +1,39 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _selection-vs-crop:
+
+********************************
+Comparison with old cropping API
+********************************
+
+The selection API was introduced to cope with deficiencies of the
+older :ref:`CROP API <crop>`, that was designed to control simple
+capture devices. Later the cropping API was adopted by video output
+drivers. The ioctls are used to select a part of the display were the
+video signal is inserted. It should be considered as an API abuse
+because the described operation is actually the composing. The
+selection API makes a clear distinction between composing and cropping
+operations by setting the appropriate targets.
+
+The CROP API lacks any support for composing to and cropping from an
+image inside a memory buffer. The application could configure a
+capture device to fill only a part of an image by abusing V4L2
+API. Cropping a smaller image from a larger one is achieved by setting
+the field ``bytesperline`` at struct :c:type:`v4l2_pix_format`.
+Introducing an image offsets could be done by modifying field
+``m_userptr`` at struct :c:type:`v4l2_buffer` before calling
+:ref:`VIDIOC_QBUF <VIDIOC_QBUF>`. Those operations should be avoided
+because they are not portable (endianness), and do not work for
+macroblock and Bayer formats and mmap buffers.
+
+The selection API deals with configuration of buffer
+cropping/composing in a clear, intuitive and portable way. Next, with
+the selection API the concepts of the padded target and constraints
+flags are introduced. Finally, struct :c:type:`v4l2_crop` and struct
+:c:type:`v4l2_cropcap` have no reserved fields. Therefore there is no
+way to extend their functionality. The new struct
+:c:type:`v4l2_selection` provides a lot of place for future
+extensions.
+
+Driver developers are encouraged to implement only selection API. The
+former cropping API would be simulated using the new one.
diff --git a/Documentation/userspace-api/media/v4l/selection-api.rst b/Documentation/userspace-api/media/v4l/selection-api.rst
new file mode 100644
index 000000000..036074374
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/selection-api.rst
@@ -0,0 +1,16 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _selection-api:
+
+Cropping, composing and scaling -- the SELECTION API
+====================================================
+
+
+.. toctree::
+    :maxdepth: 1
+
+    selection-api-intro.rst
+    selection-api-targets.rst
+    selection-api-configuration.rst
+    selection-api-vs-crop-api.rst
+    selection-api-examples.rst
diff --git a/Documentation/userspace-api/media/v4l/selection.svg b/Documentation/userspace-api/media/v4l/selection.svg
new file mode 100644
index 000000000..6305b53b8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/selection.svg
@@ -0,0 +1,1152 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later -->
+<svg enable-background="new" version="1" viewBox="0 0 4226.3 1686.8" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <defs>
+  <pattern id="ig" xlink:href="#ka" patternTransform="matrix(5.4432 0 0 10.1 1722.4 161.06)"/>
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+   <path d="m-1.2 0l-1 1 3.5-1-3.5-1 1 1z" fill="#f8d615" fill-rule="evenodd" stroke="#f8d615" stroke-width=".2pt"/>
+  </marker>
+  <pattern id="ka" width="2" height="1" patternTransform="scale(10)" patternUnits="userSpaceOnUse">
+   <path d="M0-.5h1v2H0z" fill="#f815bb"/>
+  </pattern>
+  <filter id="ep" x="-.085" y="-.366" width="1.169" height="1.732">
+   <feGaussianBlur stdDeviation="4.574"/>
+  </filter>
+  <linearGradient id="n">
+   <stop stop-color="#fff" offset="0"/>
+   <stop stop-color="#fff" stop-opacity="0" offset="1"/>
+  </linearGradient>
+  <linearGradient id="j">
+   <stop stop-color="#f9eed3" offset="0"/>
+   <stop stop-opacity="0" offset="1"/>
+  </linearGradient>
+  <linearGradient id="s">
+   <stop stop-color="#283131" stop-opacity="0" offset="0"/>
+   <stop stop-color="#1e2424" offset=".5"/>
+   <stop offset="1"/>
+  </linearGradient>
+  <linearGradient id="u">
+   <stop stop-color="#cfc690" offset="0"/>
+   <stop stop-color="#afa775" offset=".212"/>
+   <stop stop-color="#615c3a" offset=".534"/>
+   <stop offset=".765"/>
+   <stop stop-color="#403518" offset="1"/>
+  </linearGradient>
+  <radialGradient id="jd" cx="418.3" cy="342.48" r="131.45" gradientTransform="matrix(1.3957 .62111 -.42441 .95372 -15.062 -227.97)" gradientUnits="userSpaceOnUse">
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+   <stop stop-color="#1e2424" offset=".5"/>
+   <stop offset="1"/>
+  </radialGradient>
+  <filter id="iz" x="-.3" y="-.3" width="1.6" height="1.6">
+   <feGaussianBlur stdDeviation="2"/>
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diff --git a/Documentation/userspace-api/media/v4l/selections-common.rst b/Documentation/userspace-api/media/v4l/selections-common.rst
new file mode 100644
index 000000000..322b39cf0
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/selections-common.rst
@@ -0,0 +1,23 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-selections-common:
+
+Common selection definitions
+============================
+
+While the :ref:`V4L2 selection API <selection-api>` and
+:ref:`V4L2 subdev selection APIs <v4l2-subdev-selections>` are very
+similar, there's one fundamental difference between the two. On
+sub-device API, the selection rectangle refers to the media bus format,
+and is bound to a sub-device's pad. On the V4L2 interface the selection
+rectangles refer to the in-memory pixel format.
+
+This section defines the common definitions of the selection interfaces
+on the two APIs.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    v4l2-selection-targets
+    v4l2-selection-flags
diff --git a/Documentation/userspace-api/media/v4l/standard.rst b/Documentation/userspace-api/media/v4l/standard.rst
new file mode 100644
index 000000000..1f6678325
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/standard.rst
@@ -0,0 +1,185 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _standard:
+
+***************
+Video Standards
+***************
+
+Video devices typically support one or more different video standards or
+variations of standards. Each video input and output may support another
+set of standards. This set is reported by the ``std`` field of struct
+:c:type:`v4l2_input` and struct
+:c:type:`v4l2_output` returned by the
+:ref:`VIDIOC_ENUMINPUT` and
+:ref:`VIDIOC_ENUMOUTPUT` ioctls, respectively.
+
+V4L2 defines one bit for each analog video standard currently in use
+worldwide, and sets aside bits for driver defined standards, e. g.
+hybrid standards to watch NTSC video tapes on PAL TVs and vice versa.
+Applications can use the predefined bits to select a particular
+standard, although presenting the user a menu of supported standards is
+preferred. To enumerate and query the attributes of the supported
+standards applications use the :ref:`VIDIOC_ENUMSTD`
+ioctl.
+
+Many of the defined standards are actually just variations of a few
+major standards. The hardware may in fact not distinguish between them,
+or do so internal and switch automatically. Therefore enumerated
+standards also contain sets of one or more standard bits.
+
+Assume a hypothetic tuner capable of demodulating B/PAL, G/PAL and I/PAL
+signals. The first enumerated standard is a set of B and G/PAL, switched
+automatically depending on the selected radio frequency in UHF or VHF
+band. Enumeration gives a "PAL-B/G" or "PAL-I" choice. Similar a
+Composite input may collapse standards, enumerating "PAL-B/G/H/I",
+"NTSC-M" and "SECAM-D/K". [#f1]_
+
+To query and select the standard used by the current video input or
+output applications call the :ref:`VIDIOC_G_STD <VIDIOC_G_STD>` and
+:ref:`VIDIOC_S_STD <VIDIOC_G_STD>` ioctl, respectively. The
+*received* standard can be sensed with the
+:ref:`VIDIOC_QUERYSTD` ioctl.
+
+.. note::
+
+   The parameter of all these ioctls is a pointer to a
+   :ref:`v4l2_std_id <v4l2-std-id>` type (a standard set), *not* an
+   index into the standard enumeration. Drivers must implement all video
+   standard ioctls when the device has one or more video inputs or outputs.
+
+Special rules apply to devices such as USB cameras where the notion of
+video standards makes little sense. More generally for any capture or
+output device which is:
+
+-  incapable of capturing fields or frames at the nominal rate of the
+   video standard, or
+
+-  that does not support the video standard formats at all.
+
+Here the driver shall set the ``std`` field of struct
+:c:type:`v4l2_input` and struct
+:c:type:`v4l2_output` to zero and the :ref:`VIDIOC_G_STD <VIDIOC_G_STD>`,
+:ref:`VIDIOC_S_STD <VIDIOC_G_STD>`, :ref:`VIDIOC_QUERYSTD` and :ref:`VIDIOC_ENUMSTD` ioctls
+shall return the ``ENOTTY`` error code or the ``EINVAL`` error code.
+
+Applications can make use of the :ref:`input-capabilities` and
+:ref:`output-capabilities` flags to determine whether the video
+standard ioctls can be used with the given input or output.
+
+Example: Information about the current video standard
+=====================================================
+
+.. code-block:: c
+
+    v4l2_std_id std_id;
+    struct v4l2_standard standard;
+
+    if (-1 == ioctl(fd, VIDIOC_G_STD, &std_id)) {
+	/* Note when VIDIOC_ENUMSTD always returns ENOTTY this
+	   is no video device or it falls under the USB exception,
+	   and VIDIOC_G_STD returning ENOTTY is no error. */
+
+	perror("VIDIOC_G_STD");
+	exit(EXIT_FAILURE);
+    }
+
+    memset(&standard, 0, sizeof(standard));
+    standard.index = 0;
+
+    while (0 == ioctl(fd, VIDIOC_ENUMSTD, &standard)) {
+	if (standard.id & std_id) {
+	       printf("Current video standard: %s\\n", standard.name);
+	       exit(EXIT_SUCCESS);
+	}
+
+	standard.index++;
+    }
+
+    /* EINVAL indicates the end of the enumeration, which cannot be
+       empty unless this device falls under the USB exception. */
+
+    if (errno == EINVAL || standard.index == 0) {
+	perror("VIDIOC_ENUMSTD");
+	exit(EXIT_FAILURE);
+    }
+
+Example: Listing the video standards supported by the current input
+===================================================================
+
+.. code-block:: c
+
+    struct v4l2_input input;
+    struct v4l2_standard standard;
+
+    memset(&input, 0, sizeof(input));
+
+    if (-1 == ioctl(fd, VIDIOC_G_INPUT, &input.index)) {
+	perror("VIDIOC_G_INPUT");
+	exit(EXIT_FAILURE);
+    }
+
+    if (-1 == ioctl(fd, VIDIOC_ENUMINPUT, &input)) {
+	perror("VIDIOC_ENUM_INPUT");
+	exit(EXIT_FAILURE);
+    }
+
+    printf("Current input %s supports:\\n", input.name);
+
+    memset(&standard, 0, sizeof(standard));
+    standard.index = 0;
+
+    while (0 == ioctl(fd, VIDIOC_ENUMSTD, &standard)) {
+	if (standard.id & input.std)
+	    printf("%s\\n", standard.name);
+
+	standard.index++;
+    }
+
+    /* EINVAL indicates the end of the enumeration, which cannot be
+       empty unless this device falls under the USB exception. */
+
+    if (errno != EINVAL || standard.index == 0) {
+	perror("VIDIOC_ENUMSTD");
+	exit(EXIT_FAILURE);
+    }
+
+Example: Selecting a new video standard
+=======================================
+
+.. code-block:: c
+
+    struct v4l2_input input;
+    v4l2_std_id std_id;
+
+    memset(&input, 0, sizeof(input));
+
+    if (-1 == ioctl(fd, VIDIOC_G_INPUT, &input.index)) {
+	perror("VIDIOC_G_INPUT");
+	exit(EXIT_FAILURE);
+    }
+
+    if (-1 == ioctl(fd, VIDIOC_ENUMINPUT, &input)) {
+	perror("VIDIOC_ENUM_INPUT");
+	exit(EXIT_FAILURE);
+    }
+
+    if (0 == (input.std & V4L2_STD_PAL_BG)) {
+	fprintf(stderr, "Oops. B/G PAL is not supported.\\n");
+	exit(EXIT_FAILURE);
+    }
+
+    /* Note this is also supposed to work when only B
+       or G/PAL is supported. */
+
+    std_id = V4L2_STD_PAL_BG;
+
+    if (-1 == ioctl(fd, VIDIOC_S_STD, &std_id)) {
+	perror("VIDIOC_S_STD");
+	exit(EXIT_FAILURE);
+    }
+
+.. [#f1]
+   Some users are already confused by technical terms PAL, NTSC and
+   SECAM. There is no point asking them to distinguish between B, G, D,
+   or K when the software or hardware can do that automatically.
diff --git a/Documentation/userspace-api/media/v4l/streaming-par.rst b/Documentation/userspace-api/media/v4l/streaming-par.rst
new file mode 100644
index 000000000..806cbfdad
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/streaming-par.rst
@@ -0,0 +1,34 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _streaming-par:
+
+********************
+Streaming Parameters
+********************
+
+Streaming parameters are intended to optimize the video capture process
+as well as I/O. Presently applications can request a high quality
+capture mode with the :ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` ioctl.
+
+The current video standard determines a nominal number of frames per
+second. If less than this number of frames is to be captured or output,
+applications can request frame skipping or duplicating on the driver
+side. This is especially useful when using the
+:c:func:`read()` or :c:func:`write()`, which are
+not augmented by timestamps or sequence counters, and to avoid
+unnecessary data copying.
+
+Finally these ioctls can be used to determine the number of buffers used
+internally by a driver in read/write mode. For implications see the
+section discussing the :c:func:`read()` function.
+
+To get and set the streaming parameters applications call the
+:ref:`VIDIOC_G_PARM <VIDIOC_G_PARM>` and
+:ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` ioctl, respectively. They take
+a pointer to a struct :c:type:`v4l2_streamparm`, which
+contains a union holding separate parameters for input and output
+devices.
+
+These ioctls are optional, drivers need not implement them. If so, they
+return the ``EINVAL`` error code.
diff --git a/Documentation/userspace-api/media/v4l/subdev-formats.rst b/Documentation/userspace-api/media/v4l/subdev-formats.rst
new file mode 100644
index 000000000..eff6727c6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/subdev-formats.rst
@@ -0,0 +1,7901 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-mbus-format:
+
+Media Bus Formats
+=================
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_mbus_framefmt
+
+.. flat-table:: struct v4l2_mbus_framefmt
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``width``
+      - Image width in pixels.
+    * - __u32
+      - ``height``
+      - Image height in pixels. If ``field`` is one of ``V4L2_FIELD_TOP``,
+	``V4L2_FIELD_BOTTOM`` or ``V4L2_FIELD_ALTERNATE`` then height
+	refers to the number of lines in the field, otherwise it refers to
+	the number of lines in the frame (which is twice the field height
+	for interlaced formats).
+    * - __u32
+      - ``code``
+      - Format code, from enum
+	:ref:`v4l2_mbus_pixelcode <v4l2-mbus-pixelcode>`.
+    * - __u32
+      - ``field``
+      - Field order, from enum :c:type:`v4l2_field`. See
+	:ref:`field-order` for details.
+    * - __u32
+      - ``colorspace``
+      - Image colorspace, from enum :c:type:`v4l2_colorspace`.
+        Must be set by the driver for subdevices. If the application sets the
+	flag ``V4L2_MBUS_FRAMEFMT_SET_CSC`` then the application can set this
+	field on the source pad to request a specific colorspace for the media
+	bus data. If the driver cannot handle the requested conversion, it will
+	return another supported colorspace. The driver indicates that colorspace
+	conversion is supported by setting the flag
+	V4L2_SUBDEV_MBUS_CODE_CSC_COLORSPACE in the corresponding struct
+	:c:type:`v4l2_subdev_mbus_code_enum` during enumeration.
+	See :ref:`v4l2-subdev-mbus-code-flags`.
+    * - union {
+      - (anonymous)
+    * - __u16
+      - ``ycbcr_enc``
+      - Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`.
+        This information supplements the ``colorspace`` and must be set by
+	the driver for subdevices, see :ref:`colorspaces`. If the application
+	sets the flag ``V4L2_MBUS_FRAMEFMT_SET_CSC`` then the application can set
+	this field on a source pad to request a specific Y'CbCr encoding
+	for the media bus data. If the driver cannot handle the requested
+	conversion, it will return another supported encoding.
+	This field is ignored for HSV media bus formats. The driver indicates
+	that ycbcr_enc conversion is supported by setting the flag
+	V4L2_SUBDEV_MBUS_CODE_CSC_YCBCR_ENC in the corresponding struct
+	:c:type:`v4l2_subdev_mbus_code_enum` during enumeration.
+	See :ref:`v4l2-subdev-mbus-code-flags`.
+    * - __u16
+      - ``hsv_enc``
+      - HSV encoding, from enum :c:type:`v4l2_hsv_encoding`.
+        This information supplements the ``colorspace`` and must be set by
+	the driver for subdevices, see :ref:`colorspaces`. If the application
+	sets the flag ``V4L2_MBUS_FRAMEFMT_SET_CSC`` then the application can set
+	this field on a source pad to request a specific HSV encoding
+	for the media bus data. If the driver cannot handle the requested
+	conversion, it will return another supported encoding.
+	This field is ignored for Y'CbCr media bus formats. The driver indicates
+	that hsv_enc conversion is supported by setting the flag
+	V4L2_SUBDEV_MBUS_CODE_CSC_HSV_ENC in the corresponding struct
+	:c:type:`v4l2_subdev_mbus_code_enum` during enumeration.
+	See :ref:`v4l2-subdev-mbus-code-flags`
+    * - }
+      -
+    * - __u16
+      - ``quantization``
+      - Quantization range, from enum :c:type:`v4l2_quantization`.
+        This information supplements the ``colorspace`` and must be set by
+	the driver for subdevices, see :ref:`colorspaces`. If the application
+	sets the flag ``V4L2_MBUS_FRAMEFMT_SET_CSC`` then the application can set
+	this field on a source pad to request a specific quantization
+	for the media bus data. If the driver cannot handle the requested
+	conversion, it will return another supported quantization.
+	The driver indicates that quantization conversion is supported by
+	setting the flag V4L2_SUBDEV_MBUS_CODE_CSC_QUANTIZATION in the
+	corresponding struct :c:type:`v4l2_subdev_mbus_code_enum`
+	during enumeration. See :ref:`v4l2-subdev-mbus-code-flags`.
+
+    * - __u16
+      - ``xfer_func``
+      - Transfer function, from enum :c:type:`v4l2_xfer_func`.
+        This information supplements the ``colorspace`` and must be set by
+	the driver for subdevices, see :ref:`colorspaces`. If the application
+	sets the flag ``V4L2_MBUS_FRAMEFMT_SET_CSC`` then the application can set
+	this field on a source pad to request a specific transfer
+	function for the media bus data. If the driver cannot handle the requested
+	conversion, it will return another supported transfer function.
+	The driver indicates that the transfer function conversion is supported by
+	setting the flag V4L2_SUBDEV_MBUS_CODE_CSC_XFER_FUNC in the
+	corresponding struct :c:type:`v4l2_subdev_mbus_code_enum`
+	during enumeration. See :ref:`v4l2-subdev-mbus-code-flags`.
+    * - __u16
+      - ``flags``
+      - flags See:  :ref:v4l2-mbus-framefmt-flags
+    * - __u16
+      - ``reserved``\ [10]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+.. _v4l2-mbus-framefmt-flags:
+
+.. flat-table:: v4l2_mbus_framefmt Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`mbus-framefmt-set-csc`:
+
+      - ``V4L2_MBUS_FRAMEFMT_SET_CSC``
+      - 0x0001
+      - Set by the application. It is only used for source pads and is
+	ignored for sink pads. If set, then request the subdevice to do
+	colorspace conversion from the received colorspace to the requested
+	colorspace values. If the colorimetry field (``colorspace``, ``xfer_func``,
+	``ycbcr_enc``, ``hsv_enc`` or ``quantization``) is set to ``*_DEFAULT``,
+	then that colorimetry setting will remain unchanged from what was received.
+	So in order to change the quantization, only the ``quantization`` field shall
+	be set to non default value (``V4L2_QUANTIZATION_FULL_RANGE`` or
+	``V4L2_QUANTIZATION_LIM_RANGE``) and all other colorimetry fields shall
+	be set to ``*_DEFAULT``.
+
+	To check which conversions are supported by the hardware for the current
+	media bus frame format, see :ref:`v4l2-subdev-mbus-code-flags`.
+
+
+.. _v4l2-mbus-pixelcode:
+
+Media Bus Pixel Codes
+---------------------
+
+The media bus pixel codes describe image formats as flowing over
+physical buses (both between separate physical components and inside
+SoC devices). This should not be confused with the V4L2 pixel formats
+that describe, using four character codes, image formats as stored in
+memory.
+
+While there is a relationship between image formats on buses and image
+formats in memory (a raw Bayer image won't be magically converted to
+JPEG just by storing it to memory), there is no one-to-one
+correspondence between them.
+
+The media bus pixel codes document parallel formats. Should the pixel data be
+transported over a serial bus, the media bus pixel code that describes a
+parallel format that transfers a sample on a single clock cycle is used. For
+instance, both MEDIA_BUS_FMT_BGR888_1X24 and MEDIA_BUS_FMT_BGR888_3X8 are used
+on parallel busses for transferring an 8 bits per sample BGR data, whereas on
+serial busses the data in this format is only referred to using
+MEDIA_BUS_FMT_BGR888_1X24. This is because there is effectively only a single
+way to transport that format on the serial busses.
+
+Packed RGB Formats
+^^^^^^^^^^^^^^^^^^
+
+Those formats transfer pixel data as red, green and blue components. The
+format code is made of the following information.
+
+-  The red, green and blue components order code, as encoded in a pixel
+   sample. Possible values are RGB and BGR.
+
+-  The number of bits per component, for each component. The values can
+   be different for all components. Common values are 555 and 565.
+
+-  The number of bus samples per pixel. Pixels that are wider than the
+   bus width must be transferred in multiple samples. Common values are
+   1 and 2.
+
+-  The bus width.
+
+-  For formats where the total number of bits per pixel is smaller than
+   the number of bus samples per pixel times the bus width, a padding
+   value stating if the bytes are padded in their most high order bits
+   (PADHI) or low order bits (PADLO). A "C" prefix is used for
+   component-wise padding in the most high order bits (CPADHI) or low
+   order bits (CPADLO) of each separate component.
+
+-  For formats where the number of bus samples per pixel is larger than
+   1, an endianness value stating if the pixel is transferred MSB first
+   (BE) or LSB first (LE).
+
+For instance, a format where pixels are encoded as 5-bits red, 5-bits
+green and 5-bit blue values padded on the high bit, transferred as 2
+8-bit samples per pixel with the most significant bits (padding, red and
+half of the green value) transferred first will be named
+``MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE``.
+
+The following tables list existing packed RGB formats.
+
+.. HACK: ideally, we would be using adjustbox here. However, Sphinx
+.. is a very bad behaviored guy: if the table has more than 30 cols,
+.. it switches to long table, and there's no way to override it.
+
+
+.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _v4l2-mbus-pixelcode-rgb:
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. flat-table:: RGB formats
+    :header-rows:  2
+    :stub-columns: 0
+    :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`31` Data organization
+    * -
+      -
+      - Bit
+      - 31
+      - 30
+      - 29
+      - 28
+      - 27
+      - 26
+      - 25
+      - 24
+      - 23
+      - 22
+      - 21
+      - 20
+      - 19
+      - 18
+      - 17
+      - 16
+      - 15
+      - 14
+      - 13
+      - 12
+      - 11
+      - 10
+      - 9
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-RGB444-1X12:
+
+      - MEDIA_BUS_FMT_RGB444_1X12
+      - 0x1016
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB444-2X8-PADHI-BE:
+
+      - MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE
+      - 0x1001
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 0
+      - 0
+      - 0
+      - 0
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB444-2X8-PADHI-LE:
+
+      - MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE
+      - 0x1002
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 0
+      - 0
+      - 0
+      - 0
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB555-2X8-PADHI-BE:
+
+      - MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE
+      - 0x1003
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 0
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB555-2X8-PADHI-LE:
+
+      - MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE
+      - 0x1004
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 0
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+    * .. _MEDIA-BUS-FMT-RGB565-1X16:
+
+      - MEDIA_BUS_FMT_RGB565_1X16
+      - 0x1017
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-BGR565-2X8-BE:
+
+      - MEDIA_BUS_FMT_BGR565_2X8_BE
+      - 0x1005
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-BGR565-2X8-LE:
+
+      - MEDIA_BUS_FMT_BGR565_2X8_LE
+      - 0x1006
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+    * .. _MEDIA-BUS-FMT-RGB565-2X8-BE:
+
+      - MEDIA_BUS_FMT_RGB565_2X8_BE
+      - 0x1007
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB565-2X8-LE:
+
+      - MEDIA_BUS_FMT_RGB565_2X8_LE
+      - 0x1008
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+    * .. _MEDIA-BUS-FMT-RGB666-1X18:
+
+      - MEDIA_BUS_FMT_RGB666_1X18
+      - 0x1009
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RBG888-1X24:
+
+      - MEDIA_BUS_FMT_RBG888_1X24
+      - 0x100e
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB666-1X24_CPADHI:
+
+      - MEDIA_BUS_FMT_RGB666_1X24_CPADHI
+      - 0x1015
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 0
+      - 0
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - 0
+      - 0
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - 0
+      - 0
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-BGR888-1X24:
+
+      - MEDIA_BUS_FMT_BGR888_1X24
+      - 0x1013
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-BGR888-3X8:
+
+      - MEDIA_BUS_FMT_BGR888_3X8
+      - 0x101b
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-GBR888-1X24:
+
+      - MEDIA_BUS_FMT_GBR888_1X24
+      - 0x1014
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB888-1X24:
+
+      - MEDIA_BUS_FMT_RGB888_1X24
+      - 0x100a
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB888-2X12-BE:
+
+      - MEDIA_BUS_FMT_RGB888_2X12_BE
+      - 0x100b
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB888-2X12-LE:
+
+      - MEDIA_BUS_FMT_RGB888_2X12_LE
+      - 0x100c
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+    * .. _MEDIA-BUS-FMT-RGB888-3X8:
+
+      - MEDIA_BUS_FMT_RGB888_3X8
+      - 0x101c
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-ARGB888-1X32:
+
+      - MEDIA_BUS_FMT_ARGB888_1X32
+      - 0x100d
+      -
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB888-1X32-PADHI:
+
+      - MEDIA_BUS_FMT_RGB888_1X32_PADHI
+      - 0x100f
+      -
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB101010-1X30:
+
+      - MEDIA_BUS_FMT_RGB101010_1X30
+      - 0x1018
+      -
+      -
+      -
+      - r\ :sub:`9`
+      - r\ :sub:`8`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+.. raw:: latex
+
+    \endgroup
+
+
+The following table list existing packed 36bit wide RGB formats.
+
+.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _v4l2-mbus-pixelcode-rgb-36:
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. flat-table:: 36bit RGB formats
+    :header-rows:  2
+    :stub-columns: 0
+    :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`35` Data organization
+    * -
+      -
+      - Bit
+      - 35
+      - 34
+      - 33
+      - 32
+      - 31
+      - 30
+      - 29
+      - 28
+      - 27
+      - 26
+      - 25
+      - 24
+      - 23
+      - 22
+      - 21
+      - 20
+      - 19
+      - 18
+      - 17
+      - 16
+      - 15
+      - 14
+      - 13
+      - 12
+      - 11
+      - 10
+      - 9
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-RGB121212-1X36:
+
+      - MEDIA_BUS_FMT_RGB121212_1X36
+      - 0x1019
+      -
+      - r\ :sub:`11`
+      - r\ :sub:`10`
+      - r\ :sub:`9`
+      - r\ :sub:`8`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+      - g\ :sub:`11`
+      - g\ :sub:`10`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`11`
+      - b\ :sub:`10`
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+.. raw:: latex
+
+    \endgroup
+
+
+The following table list existing packed 48bit wide RGB formats.
+
+.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _v4l2-mbus-pixelcode-rgb-48:
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. flat-table:: 48bit RGB formats
+    :header-rows:  3
+    :stub-columns: 0
+    :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`31` Data organization
+    * -
+      -
+      - Bit
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 47
+      - 46
+      - 45
+      - 44
+      - 43
+      - 42
+      - 41
+      - 40
+      - 39
+      - 38
+      - 37
+      - 36
+      - 35
+      - 34
+      - 33
+      - 32
+    * -
+      -
+      -
+      - 31
+      - 30
+      - 29
+      - 28
+      - 27
+      - 26
+      - 25
+      - 24
+      - 23
+      - 22
+      - 21
+      - 20
+      - 19
+      - 18
+      - 17
+      - 16
+      - 15
+      - 14
+      - 13
+      - 12
+      - 11
+      - 10
+      - 9
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-RGB161616-1X48:
+
+      - MEDIA_BUS_FMT_RGB161616_1X48
+      - 0x101a
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`15`
+      - r\ :sub:`14`
+      - r\ :sub:`13`
+      - r\ :sub:`12`
+      - r\ :sub:`11`
+      - r\ :sub:`10`
+      - r\ :sub:`9`
+      - r\ :sub:`8`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * -
+      -
+      -
+      - g\ :sub:`15`
+      - g\ :sub:`14`
+      - g\ :sub:`13`
+      - g\ :sub:`12`
+      - g\ :sub:`11`
+      - g\ :sub:`10`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+      - b\ :sub:`15`
+      - b\ :sub:`14`
+      - b\ :sub:`13`
+      - b\ :sub:`12`
+      - b\ :sub:`11`
+      - b\ :sub:`10`
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+
+.. raw:: latex
+
+    \endgroup
+
+On LVDS buses, usually each sample is transferred serialized in seven
+time slots per pixel clock, on three (18-bit) or four (24-bit)
+differential data pairs at the same time. The remaining bits are used
+for control signals as defined by SPWG/PSWG/VESA or JEIDA standards. The
+24-bit RGB format serialized in seven time slots on four lanes using
+JEIDA defined bit mapping will be named
+``MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA``, for example.
+
+.. raw:: latex
+
+    \tiny
+
+.. _v4l2-mbus-pixelcode-rgb-lvds:
+
+.. flat-table:: LVDS RGB formats
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      -
+      -
+      - :cspan:`3` Data organization
+    * -
+      -
+      - Timeslot
+      - Lane
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-RGB666-1X7X3-SPWG:
+
+      - MEDIA_BUS_FMT_RGB666_1X7X3_SPWG
+      - 0x1010
+      - 0
+      -
+      -
+      - d
+      - b\ :sub:`1`
+      - g\ :sub:`0`
+    * -
+      -
+      - 1
+      -
+      -
+      - d
+      - b\ :sub:`0`
+      - r\ :sub:`5`
+    * -
+      -
+      - 2
+      -
+      -
+      - d
+      - g\ :sub:`5`
+      - r\ :sub:`4`
+    * -
+      -
+      - 3
+      -
+      -
+      - b\ :sub:`5`
+      - g\ :sub:`4`
+      - r\ :sub:`3`
+    * -
+      -
+      - 4
+      -
+      -
+      - b\ :sub:`4`
+      - g\ :sub:`3`
+      - r\ :sub:`2`
+    * -
+      -
+      - 5
+      -
+      -
+      - b\ :sub:`3`
+      - g\ :sub:`2`
+      - r\ :sub:`1`
+    * -
+      -
+      - 6
+      -
+      -
+      - b\ :sub:`2`
+      - g\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB888-1X7X4-SPWG:
+
+      - MEDIA_BUS_FMT_RGB888_1X7X4_SPWG
+      - 0x1011
+      - 0
+      -
+      - d
+      - d
+      - b\ :sub:`1`
+      - g\ :sub:`0`
+    * -
+      -
+      - 1
+      -
+      - b\ :sub:`7`
+      - d
+      - b\ :sub:`0`
+      - r\ :sub:`5`
+    * -
+      -
+      - 2
+      -
+      - b\ :sub:`6`
+      - d
+      - g\ :sub:`5`
+      - r\ :sub:`4`
+    * -
+      -
+      - 3
+      -
+      - g\ :sub:`7`
+      - b\ :sub:`5`
+      - g\ :sub:`4`
+      - r\ :sub:`3`
+    * -
+      -
+      - 4
+      -
+      - g\ :sub:`6`
+      - b\ :sub:`4`
+      - g\ :sub:`3`
+      - r\ :sub:`2`
+    * -
+      -
+      - 5
+      -
+      - r\ :sub:`7`
+      - b\ :sub:`3`
+      - g\ :sub:`2`
+      - r\ :sub:`1`
+    * -
+      -
+      - 6
+      -
+      - r\ :sub:`6`
+      - b\ :sub:`2`
+      - g\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-RGB888-1X7X4-JEIDA:
+
+      - MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA
+      - 0x1012
+      - 0
+      -
+      - d
+      - d
+      - b\ :sub:`3`
+      - g\ :sub:`2`
+    * -
+      -
+      - 1
+      -
+      - b\ :sub:`1`
+      - d
+      - b\ :sub:`2`
+      - r\ :sub:`7`
+    * -
+      -
+      - 2
+      -
+      - b\ :sub:`0`
+      - d
+      - g\ :sub:`7`
+      - r\ :sub:`6`
+    * -
+      -
+      - 3
+      -
+      - g\ :sub:`1`
+      - b\ :sub:`7`
+      - g\ :sub:`6`
+      - r\ :sub:`5`
+    * -
+      -
+      - 4
+      -
+      - g\ :sub:`0`
+      - b\ :sub:`6`
+      - g\ :sub:`5`
+      - r\ :sub:`4`
+    * -
+      -
+      - 5
+      -
+      - r\ :sub:`1`
+      - b\ :sub:`5`
+      - g\ :sub:`4`
+      - r\ :sub:`3`
+    * -
+      -
+      - 6
+      -
+      - r\ :sub:`0`
+      - b\ :sub:`4`
+      - g\ :sub:`3`
+      - r\ :sub:`2`
+
+.. raw:: latex
+
+    \normalsize
+
+
+Bayer Formats
+^^^^^^^^^^^^^
+
+Those formats transfer pixel data as red, green and blue components. The
+format code is made of the following information.
+
+-  The red, green and blue components order code, as encoded in a pixel
+   sample. The possible values are shown in :ref:`bayer-patterns`.
+
+-  The number of bits per pixel component. All components are
+   transferred on the same number of bits. Common values are 8, 10 and
+   12.
+
+-  The compression (optional). If the pixel components are ALAW- or
+   DPCM-compressed, a mention of the compression scheme and the number
+   of bits per compressed pixel component.
+
+-  The number of bus samples per pixel. Pixels that are wider than the
+   bus width must be transferred in multiple samples. Common values are
+   1 and 2.
+
+-  The bus width.
+
+-  For formats where the total number of bits per pixel is smaller than
+   the number of bus samples per pixel times the bus width, a padding
+   value stating if the bytes are padded in their most high order bits
+   (PADHI) or low order bits (PADLO).
+
+-  For formats where the number of bus samples per pixel is larger than
+   1, an endianness value stating if the pixel is transferred MSB first
+   (BE) or LSB first (LE).
+
+For instance, a format with uncompressed 10-bit Bayer components
+arranged in a red, green, green, blue pattern transferred as 2 8-bit
+samples per pixel with the least significant bits transferred first will
+be named ``MEDIA_BUS_FMT_SRGGB10_2X8_PADHI_LE``.
+
+
+.. _bayer-patterns:
+
+.. kernel-figure:: bayer.svg
+    :alt:    bayer.svg
+    :align:  center
+
+    **Figure 4.8 Bayer Patterns**
+
+The following table lists existing packed Bayer formats. The data
+organization is given as an example for the first pixel only.
+
+
+.. HACK: ideally, we would be using adjustbox here. However, Sphinx
+.. is a very bad behaviored guy: if the table has more than 30 cols,
+.. it switches to long table, and there's no way to override it.
+
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.3cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _v4l2-mbus-pixelcode-bayer:
+
+.. cssclass: longtable
+
+.. flat-table:: Bayer Formats
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`15` Data organization
+    * -
+      -
+      - Bit
+      - 15
+      - 14
+      - 13
+      - 12
+      - 11
+      - 10
+      - 9
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-SBGGR8-1X8:
+
+      - MEDIA_BUS_FMT_SBGGR8_1X8
+      - 0x3001
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGBRG8-1X8:
+
+      - MEDIA_BUS_FMT_SGBRG8_1X8
+      - 0x3013
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGRBG8-1X8:
+
+      - MEDIA_BUS_FMT_SGRBG8_1X8
+      - 0x3002
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SRGGB8-1X8:
+
+      - MEDIA_BUS_FMT_SRGGB8_1X8
+      - 0x3014
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SBGGR10-ALAW8-1X8:
+
+      - MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8
+      - 0x3015
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGBRG10-ALAW8-1X8:
+
+      - MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8
+      - 0x3016
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGRBG10-ALAW8-1X8:
+
+      - MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8
+      - 0x3017
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SRGGB10-ALAW8-1X8:
+
+      - MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8
+      - 0x3018
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SBGGR10-DPCM8-1X8:
+
+      - MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8
+      - 0x300b
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGBRG10-DPCM8-1X8:
+
+      - MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8
+      - 0x300c
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGRBG10-DPCM8-1X8:
+
+      - MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8
+      - 0x3009
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SRGGB10-DPCM8-1X8:
+
+      - MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8
+      - 0x300d
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SBGGR10-2X8-PADHI-BE:
+
+      - MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE
+      - 0x3003
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SBGGR10-2X8-PADHI-LE:
+
+      - MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE
+      - 0x3004
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+    * .. _MEDIA-BUS-FMT-SBGGR10-2X8-PADLO-BE:
+
+      - MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE
+      - 0x3005
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+    * .. _MEDIA-BUS-FMT-SBGGR10-2X8-PADLO-LE:
+
+      - MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE
+      - 0x3006
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+    * .. _MEDIA-BUS-FMT-SBGGR10-1X10:
+
+      - MEDIA_BUS_FMT_SBGGR10_1X10
+      - 0x3007
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGBRG10-1X10:
+
+      - MEDIA_BUS_FMT_SGBRG10_1X10
+      - 0x300e
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGRBG10-1X10:
+
+      - MEDIA_BUS_FMT_SGRBG10_1X10
+      - 0x300a
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SRGGB10-1X10:
+
+      - MEDIA_BUS_FMT_SRGGB10_1X10
+      - 0x300f
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`9`
+      - r\ :sub:`8`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SBGGR12-1X12:
+
+      - MEDIA_BUS_FMT_SBGGR12_1X12
+      - 0x3008
+      -
+      -
+      -
+      -
+      -
+      - b\ :sub:`11`
+      - b\ :sub:`10`
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGBRG12-1X12:
+
+      - MEDIA_BUS_FMT_SGBRG12_1X12
+      - 0x3010
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`11`
+      - g\ :sub:`10`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGRBG12-1X12:
+
+      - MEDIA_BUS_FMT_SGRBG12_1X12
+      - 0x3011
+      -
+      -
+      -
+      -
+      -
+      - g\ :sub:`11`
+      - g\ :sub:`10`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SRGGB12-1X12:
+
+      - MEDIA_BUS_FMT_SRGGB12_1X12
+      - 0x3012
+      -
+      -
+      -
+      -
+      -
+      - r\ :sub:`11`
+      - r\ :sub:`10`
+      - r\ :sub:`9`
+      - r\ :sub:`8`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SBGGR14-1X14:
+
+      - MEDIA_BUS_FMT_SBGGR14_1X14
+      - 0x3019
+      -
+      -
+      -
+      - b\ :sub:`13`
+      - b\ :sub:`12`
+      - b\ :sub:`11`
+      - b\ :sub:`10`
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGBRG14-1X14:
+
+      - MEDIA_BUS_FMT_SGBRG14_1X14
+      - 0x301a
+      -
+      -
+      -
+      - g\ :sub:`13`
+      - g\ :sub:`12`
+      - g\ :sub:`11`
+      - g\ :sub:`10`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGRBG14-1X14:
+
+      - MEDIA_BUS_FMT_SGRBG14_1X14
+      - 0x301b
+      -
+      -
+      -
+      - g\ :sub:`13`
+      - g\ :sub:`12`
+      - g\ :sub:`11`
+      - g\ :sub:`10`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SRGGB14-1X14:
+
+      - MEDIA_BUS_FMT_SRGGB14_1X14
+      - 0x301c
+      -
+      -
+      -
+      - r\ :sub:`13`
+      - r\ :sub:`12`
+      - r\ :sub:`11`
+      - r\ :sub:`10`
+      - r\ :sub:`9`
+      - r\ :sub:`8`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SBGGR16-1X16:
+
+      - MEDIA_BUS_FMT_SBGGR16_1X16
+      - 0x301d
+      -
+      - b\ :sub:`15`
+      - b\ :sub:`14`
+      - b\ :sub:`13`
+      - b\ :sub:`12`
+      - b\ :sub:`11`
+      - b\ :sub:`10`
+      - b\ :sub:`9`
+      - b\ :sub:`8`
+      - b\ :sub:`7`
+      - b\ :sub:`6`
+      - b\ :sub:`5`
+      - b\ :sub:`4`
+      - b\ :sub:`3`
+      - b\ :sub:`2`
+      - b\ :sub:`1`
+      - b\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGBRG16-1X16:
+
+      - MEDIA_BUS_FMT_SGBRG16_1X16
+      - 0x301e
+      -
+      - g\ :sub:`15`
+      - g\ :sub:`14`
+      - g\ :sub:`13`
+      - g\ :sub:`12`
+      - g\ :sub:`11`
+      - g\ :sub:`10`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SGRBG16-1X16:
+
+      - MEDIA_BUS_FMT_SGRBG16_1X16
+      - 0x301f
+      -
+      - g\ :sub:`15`
+      - g\ :sub:`14`
+      - g\ :sub:`13`
+      - g\ :sub:`12`
+      - g\ :sub:`11`
+      - g\ :sub:`10`
+      - g\ :sub:`9`
+      - g\ :sub:`8`
+      - g\ :sub:`7`
+      - g\ :sub:`6`
+      - g\ :sub:`5`
+      - g\ :sub:`4`
+      - g\ :sub:`3`
+      - g\ :sub:`2`
+      - g\ :sub:`1`
+      - g\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-SRGGB16-1X16:
+
+      - MEDIA_BUS_FMT_SRGGB16_1X16
+      - 0x3020
+      -
+      - r\ :sub:`15`
+      - r\ :sub:`14`
+      - r\ :sub:`13`
+      - r\ :sub:`12`
+      - r\ :sub:`11`
+      - r\ :sub:`10`
+      - r\ :sub:`9`
+      - r\ :sub:`8`
+      - r\ :sub:`7`
+      - r\ :sub:`6`
+      - r\ :sub:`5`
+      - r\ :sub:`4`
+      - r\ :sub:`3`
+      - r\ :sub:`2`
+      - r\ :sub:`1`
+      - r\ :sub:`0`
+
+.. raw:: latex
+
+    \endgroup
+
+
+Packed YUV Formats
+^^^^^^^^^^^^^^^^^^
+
+Those data formats transfer pixel data as (possibly downsampled) Y, U
+and V components. Some formats include dummy bits in some of their
+samples and are collectively referred to as "YDYC" (Y-Dummy-Y-Chroma)
+formats. One cannot rely on the values of these dummy bits as those are
+undefined.
+
+The format code is made of the following information.
+
+-  The Y, U and V components order code, as transferred on the bus.
+   Possible values are YUYV, UYVY, YVYU and VYUY for formats with no
+   dummy bit, and YDYUYDYV, YDYVYDYU, YUYDYVYD and YVYDYUYD for YDYC
+   formats.
+
+-  The number of bits per pixel component. All components are
+   transferred on the same number of bits. Common values are 8, 10 and
+   12.
+
+-  The number of bus samples per pixel. Pixels that are wider than the
+   bus width must be transferred in multiple samples. Common values are
+   0.5 (encoded as 0_5; in this case two pixels are transferred per bus
+   sample), 1, 1.5 (encoded as 1_5) and 2.
+
+-  The bus width. When the bus width is larger than the number of bits
+   per pixel component, several components are packed in a single bus
+   sample. The components are ordered as specified by the order code,
+   with components on the left of the code transferred in the high order
+   bits. Common values are 8 and 16.
+
+For instance, a format where pixels are encoded as 8-bit YUV values
+downsampled to 4:2:2 and transferred as 2 8-bit bus samples per pixel in
+the U, Y, V, Y order will be named ``MEDIA_BUS_FMT_UYVY8_2X8``.
+
+:ref:`v4l2-mbus-pixelcode-yuv8` lists existing packed YUV formats and
+describes the organization of each pixel data in each sample. When a
+format pattern is split across multiple samples each of the samples in
+the pattern is described.
+
+The role of each bit transferred over the bus is identified by one of
+the following codes.
+
+-  y\ :sub:`x` for luma component bit number x
+
+-  u\ :sub:`x` for blue chroma component bit number x
+
+-  v\ :sub:`x` for red chroma component bit number x
+
+-  a\ :sub:`x` for alpha component bit number x
+
+- for non-available bits (for positions higher than the bus width)
+
+-  d for dummy bits
+
+.. HACK: ideally, we would be using adjustbox here. However, this
+.. will never work for this table, as, even with tiny font, it is
+.. to big for a single page. So, we need to manually adjust the
+.. size.
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _v4l2-mbus-pixelcode-yuv8:
+
+.. flat-table:: YUV Formats
+    :header-rows:  2
+    :stub-columns: 0
+    :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`31` Data organization
+    * -
+      -
+      - Bit
+      - 31
+      - 30
+      - 29
+      - 28
+      - 27
+      - 26
+      - 25
+      - 24
+      - 23
+      - 22
+      - 21
+      - 10
+      - 19
+      - 18
+      - 17
+      - 16
+      - 15
+      - 14
+      - 13
+      - 12
+      - 11
+      - 10
+      - 9
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-Y8-1X8:
+
+      - MEDIA_BUS_FMT_Y8_1X8
+      - 0x2001
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UV8-1X8:
+
+      - MEDIA_BUS_FMT_UV8_1X8
+      - 0x2015
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYVY8-1_5X8:
+
+      - MEDIA_BUS_FMT_UYVY8_1_5X8
+      - 0x2002
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-VYUY8-1_5X8:
+
+      - MEDIA_BUS_FMT_VYUY8_1_5X8
+      - 0x2003
+      -
+      -
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+      - v\ :sub:`3`
+      - v\ :sub:`2`
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+      - v\ :sub:`0`
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+      - y\ :sub:`0`
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+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUYV8-1_5X8:
+
+      - MEDIA_BUS_FMT_YUYV8_1_5X8
+      - 0x2004
+      -
+      -
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+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YVYU8-1_5X8:
+
+      - MEDIA_BUS_FMT_YVYU8_1_5X8
+      - 0x2005
+      -
+      -
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+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
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+      - y\ :sub:`3`
+      - y\ :sub:`2`
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+      - y\ :sub:`0`
+    * -
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+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYVY8-2X8:
+
+      - MEDIA_BUS_FMT_UYVY8_2X8
+      - 0x2006
+      -
+      -
+      -
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+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
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+      - y\ :sub:`0`
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+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
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+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-VYUY8-2X8:
+
+      - MEDIA_BUS_FMT_VYUY8_2X8
+      - 0x2007
+      -
+      -
+      -
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+      -
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+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
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+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
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+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
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+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUYV8-2X8:
+
+      - MEDIA_BUS_FMT_YUYV8_2X8
+      - 0x2008
+      -
+      -
+      -
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+      -
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+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
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+      - u\ :sub:`7`
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+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
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+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
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+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YVYU8-2X8:
+
+      - MEDIA_BUS_FMT_YVYU8_2X8
+      - 0x2009
+      -
+      -
+      -
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+      -
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+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
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+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
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+      -
+      -
+      -
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-Y10-1X10:
+
+      - MEDIA_BUS_FMT_Y10_1X10
+      - 0x200a
+      -
+      -
+      -
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+      -
+      -
+      -
+      - y\ :sub:`9`
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+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-Y10-2X8-PADHI_LE:
+
+      - MEDIA_BUS_FMT_Y10_2X8_PADHI_LE
+      - 0x202c
+      -
+      -
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+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
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+      -
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+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - 0
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+    * .. _MEDIA-BUS-FMT-UYVY10-2X10:
+
+      - MEDIA_BUS_FMT_UYVY10_2X10
+      - 0x2018
+      -
+      -
+      -
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+      -
+      -
+      -
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
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+      - y\ :sub:`9`
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+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
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+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
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+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-VYUY10-2X10:
+
+      - MEDIA_BUS_FMT_VYUY10_2X10
+      - 0x2019
+      -
+      -
+      -
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+      - v\ :sub:`9`
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+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
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+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
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+      - u\ :sub:`9`
+      - u\ :sub:`8`
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+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
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+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUYV10-2X10:
+
+      - MEDIA_BUS_FMT_YUYV10_2X10
+      - 0x200b
+      -
+      -
+      -
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+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
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+      - u\ :sub:`9`
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+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
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+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
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+      -
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+      -
+      -
+      -
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YVYU10-2X10:
+
+      - MEDIA_BUS_FMT_YVYU10_2X10
+      - 0x200c
+      -
+      -
+      -
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+      -
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+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
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+      -
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+      -
+      -
+      -
+      -
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
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+      -
+      -
+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
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+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-Y12-1X12:
+
+      - MEDIA_BUS_FMT_Y12_1X12
+      - 0x2013
+      -
+      -
+      -
+      -
+      -
+      -
+      -
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+      -
+      -
+      -
+      -
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+      -
+      -
+      -
+      -
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+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYVY12-2X12:
+
+      - MEDIA_BUS_FMT_UYVY12_2X12
+      - 0x201c
+      -
+      -
+      -
+      -
+      -
+      -
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+      -
+      -
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+      -
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+      -
+      -
+      -
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
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+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
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+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-VYUY12-2X12:
+
+      - MEDIA_BUS_FMT_VYUY12_2X12
+      - 0x201d
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
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+      -
+      -
+      -
+      -
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+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUYV12-2X12:
+
+      - MEDIA_BUS_FMT_YUYV12_2X12
+      - 0x201e
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YVYU12-2X12:
+
+      - MEDIA_BUS_FMT_YVYU12_2X12
+      - 0x201f
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-Y14-1X14:
+
+      - MEDIA_BUS_FMT_Y14_1X14
+      - 0x202d
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`13`
+      - y\ :sub:`12`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYVY8-1X16:
+
+      - MEDIA_BUS_FMT_UYVY8_1X16
+      - 0x200f
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-VYUY8-1X16:
+
+      - MEDIA_BUS_FMT_VYUY8_1X16
+      - 0x2010
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUYV8-1X16:
+
+      - MEDIA_BUS_FMT_YUYV8_1X16
+      - 0x2011
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YVYU8-1X16:
+
+      - MEDIA_BUS_FMT_YVYU8_1X16
+      - 0x2012
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YDYUYDYV8-1X16:
+
+      - MEDIA_BUS_FMT_YDYUYDYV8_1X16
+      - 0x2014
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - d
+      - d
+      - d
+      - d
+      - d
+      - d
+      - d
+      - d
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - d
+      - d
+      - d
+      - d
+      - d
+      - d
+      - d
+      - d
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYVY10-1X20:
+
+      - MEDIA_BUS_FMT_UYVY10_1X20
+      - 0x201a
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-VYUY10-1X20:
+
+      - MEDIA_BUS_FMT_VYUY10_1X20
+      - 0x201b
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUYV10-1X20:
+
+      - MEDIA_BUS_FMT_YUYV10_1X20
+      - 0x200d
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YVYU10-1X20:
+
+      - MEDIA_BUS_FMT_YVYU10_1X20
+      - 0x200e
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-VUY8-1X24:
+
+      - MEDIA_BUS_FMT_VUY8_1X24
+      - 0x201a
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUV8-1X24:
+
+      - MEDIA_BUS_FMT_YUV8_1X24
+      - 0x2025
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYYVYY8-0-5X24:
+
+      - MEDIA_BUS_FMT_UYYVYY8_0_5X24
+      - 0x2026
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYVY12-1X24:
+
+      - MEDIA_BUS_FMT_UYVY12_1X24
+      - 0x2020
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-VYUY12-1X24:
+
+      - MEDIA_BUS_FMT_VYUY12_1X24
+      - 0x2021
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUYV12-1X24:
+
+      - MEDIA_BUS_FMT_YUYV12_1X24
+      - 0x2022
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YVYU12-1X24:
+
+      - MEDIA_BUS_FMT_YVYU12_1X24
+      - 0x2023
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUV10-1X30:
+
+      - MEDIA_BUS_FMT_YUV10_1X30
+      - 0x2016
+      -
+      -
+      -
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYYVYY10-0-5X30:
+
+      - MEDIA_BUS_FMT_UYYVYY10_0_5X30
+      - 0x2027
+      -
+      -
+      -
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-AYUV8-1X32:
+
+      - MEDIA_BUS_FMT_AYUV8_1X32
+      - 0x2017
+      -
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+
+
+.. raw:: latex
+
+	\endgroup
+
+
+The following table list existing packed 36bit wide YUV formats.
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _v4l2-mbus-pixelcode-yuv8-36bit:
+
+.. flat-table:: 36bit YUV Formats
+    :header-rows:  2
+    :stub-columns: 0
+    :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`35` Data organization
+    * -
+      -
+      - Bit
+      - 35
+      - 34
+      - 33
+      - 32
+      - 31
+      - 30
+      - 29
+      - 28
+      - 27
+      - 26
+      - 25
+      - 24
+      - 23
+      - 22
+      - 21
+      - 10
+      - 19
+      - 18
+      - 17
+      - 16
+      - 15
+      - 14
+      - 13
+      - 12
+      - 11
+      - 10
+      - 9
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-UYYVYY12-0-5X36:
+
+      - MEDIA_BUS_FMT_UYYVYY12_0_5X36
+      - 0x2028
+      -
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-YUV12-1X36:
+
+      - MEDIA_BUS_FMT_YUV12_1X36
+      - 0x2029
+      -
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+
+
+.. raw:: latex
+
+	\endgroup
+
+
+The following table list existing packed 48bit wide YUV formats.
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _v4l2-mbus-pixelcode-yuv8-48bit:
+
+.. flat-table:: 48bit YUV Formats
+    :header-rows:  3
+    :stub-columns: 0
+    :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`31` Data organization
+    * -
+      -
+      - Bit
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - 47
+      - 46
+      - 45
+      - 44
+      - 43
+      - 42
+      - 41
+      - 40
+      - 39
+      - 38
+      - 37
+      - 36
+      - 35
+      - 34
+      - 33
+      - 32
+    * -
+      -
+      -
+      - 31
+      - 30
+      - 29
+      - 28
+      - 27
+      - 26
+      - 25
+      - 24
+      - 23
+      - 22
+      - 21
+      - 10
+      - 19
+      - 18
+      - 17
+      - 16
+      - 15
+      - 14
+      - 13
+      - 12
+      - 11
+      - 10
+      - 9
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-YUV16-1X48:
+
+      - MEDIA_BUS_FMT_YUV16_1X48
+      - 0x202a
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - y\ :sub:`15`
+      - y\ :sub:`14`
+      - y\ :sub:`13`
+      - y\ :sub:`12`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`8`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      - u\ :sub:`15`
+      - u\ :sub:`14`
+      - u\ :sub:`13`
+      - u\ :sub:`12`
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+      - v\ :sub:`15`
+      - v\ :sub:`14`
+      - v\ :sub:`13`
+      - v\ :sub:`12`
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _MEDIA-BUS-FMT-UYYVYY16-0-5X48:
+
+      - MEDIA_BUS_FMT_UYYVYY16_0_5X48
+      - 0x202b
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - u\ :sub:`15`
+      - u\ :sub:`14`
+      - u\ :sub:`13`
+      - u\ :sub:`12`
+      - u\ :sub:`11`
+      - u\ :sub:`10`
+      - u\ :sub:`9`
+      - u\ :sub:`8`
+      - u\ :sub:`7`
+      - u\ :sub:`6`
+      - u\ :sub:`5`
+      - u\ :sub:`4`
+      - u\ :sub:`3`
+      - u\ :sub:`2`
+      - u\ :sub:`1`
+      - u\ :sub:`0`
+    * -
+      -
+      -
+      - y\ :sub:`15`
+      - y\ :sub:`14`
+      - y\ :sub:`13`
+      - y\ :sub:`12`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - y\ :sub:`15`
+      - y\ :sub:`14`
+      - y\ :sub:`13`
+      - y\ :sub:`12`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`8`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+    * -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - v\ :sub:`15`
+      - v\ :sub:`14`
+      - v\ :sub:`13`
+      - v\ :sub:`12`
+      - v\ :sub:`11`
+      - v\ :sub:`10`
+      - v\ :sub:`9`
+      - v\ :sub:`8`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * -
+      -
+      -
+      - y\ :sub:`15`
+      - y\ :sub:`14`
+      - y\ :sub:`13`
+      - y\ :sub:`12`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`9`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+      - y\ :sub:`15`
+      - y\ :sub:`14`
+      - y\ :sub:`13`
+      - y\ :sub:`12`
+      - y\ :sub:`11`
+      - y\ :sub:`10`
+      - y\ :sub:`8`
+      - y\ :sub:`8`
+      - y\ :sub:`7`
+      - y\ :sub:`6`
+      - y\ :sub:`5`
+      - y\ :sub:`4`
+      - y\ :sub:`3`
+      - y\ :sub:`2`
+      - y\ :sub:`1`
+      - y\ :sub:`0`
+
+
+.. raw:: latex
+
+	\endgroup
+
+HSV/HSL Formats
+^^^^^^^^^^^^^^^
+
+Those formats transfer pixel data as RGB values in a
+cylindrical-coordinate system using Hue-Saturation-Value or
+Hue-Saturation-Lightness components. The format code is made of the
+following information.
+
+-  The hue, saturation, value or lightness and optional alpha components
+   order code, as encoded in a pixel sample. The only currently
+   supported value is AHSV.
+
+-  The number of bits per component, for each component. The values can
+   be different for all components. The only currently supported value
+   is 8888.
+
+-  The number of bus samples per pixel. Pixels that are wider than the
+   bus width must be transferred in multiple samples. The only currently
+   supported value is 1.
+
+-  The bus width.
+
+-  For formats where the total number of bits per pixel is smaller than
+   the number of bus samples per pixel times the bus width, a padding
+   value stating if the bytes are padded in their most high order bits
+   (PADHI) or low order bits (PADLO).
+
+-  For formats where the number of bus samples per pixel is larger than
+   1, an endianness value stating if the pixel is transferred MSB first
+   (BE) or LSB first (LE).
+
+The following table lists existing HSV/HSL formats.
+
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+.. tabularcolumns:: |p{3.9cm}|p{0.73cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
+
+.. _v4l2-mbus-pixelcode-hsv:
+
+.. flat-table:: HSV/HSL formats
+    :header-rows:  2
+    :stub-columns: 0
+    :widths: 28 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`31` Data organization
+    * -
+      -
+      - Bit
+      - 31
+      - 30
+      - 29
+      - 28
+      - 27
+      - 26
+      - 25
+      - 24
+      - 23
+      - 22
+      - 21
+      - 20
+      - 19
+      - 18
+      - 17
+      - 16
+      - 15
+      - 14
+      - 13
+      - 12
+      - 11
+      - 10
+      - 9
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _MEDIA-BUS-FMT-AHSV8888-1X32:
+
+      - MEDIA_BUS_FMT_AHSV8888_1X32
+      - 0x6001
+      -
+      - a\ :sub:`7`
+      - a\ :sub:`6`
+      - a\ :sub:`5`
+      - a\ :sub:`4`
+      - a\ :sub:`3`
+      - a\ :sub:`2`
+      - a\ :sub:`1`
+      - a\ :sub:`0`
+      - h\ :sub:`7`
+      - h\ :sub:`6`
+      - h\ :sub:`5`
+      - h\ :sub:`4`
+      - h\ :sub:`3`
+      - h\ :sub:`2`
+      - h\ :sub:`1`
+      - h\ :sub:`0`
+      - s\ :sub:`7`
+      - s\ :sub:`6`
+      - s\ :sub:`5`
+      - s\ :sub:`4`
+      - s\ :sub:`3`
+      - s\ :sub:`2`
+      - s\ :sub:`1`
+      - s\ :sub:`0`
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+
+.. raw:: latex
+
+    \normalsize
+
+
+JPEG Compressed Formats
+^^^^^^^^^^^^^^^^^^^^^^^
+
+Those data formats consist of an ordered sequence of 8-bit bytes
+obtained from JPEG compression process. Additionally to the ``_JPEG``
+postfix the format code is made of the following information.
+
+-  The number of bus samples per entropy encoded byte.
+
+-  The bus width.
+
+For instance, for a JPEG baseline process and an 8-bit bus width the
+format will be named ``MEDIA_BUS_FMT_JPEG_1X8``.
+
+The following table lists existing JPEG compressed formats.
+
+
+.. _v4l2-mbus-pixelcode-jpeg:
+
+.. tabularcolumns:: |p{6.0cm}|p{1.4cm}|p{10.1cm}|
+
+.. flat-table:: JPEG Formats
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      - Remarks
+    * .. _MEDIA-BUS-FMT-JPEG-1X8:
+
+      - MEDIA_BUS_FMT_JPEG_1X8
+      - 0x4001
+      - Besides of its usage for the parallel bus this format is
+	recommended for transmission of JPEG data over MIPI CSI bus using
+	the User Defined 8-bit Data types.
+
+
+
+.. _v4l2-mbus-vendor-spec-fmts:
+
+Vendor and Device Specific Formats
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+This section lists complex data formats that are either vendor or device
+specific.
+
+The following table lists the existing vendor and device specific
+formats.
+
+
+.. _v4l2-mbus-pixelcode-vendor-specific:
+
+.. tabularcolumns:: |p{8.0cm}|p{1.4cm}|p{7.7cm}|
+
+.. flat-table:: Vendor and device specific formats
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      - Comments
+    * .. _MEDIA-BUS-FMT-S5C-UYVY-JPEG-1X8:
+
+      - MEDIA_BUS_FMT_S5C_UYVY_JPEG_1X8
+      - 0x5001
+      - Interleaved raw UYVY and JPEG image format with embedded meta-data
+	used by Samsung S3C73MX camera sensors.
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new file mode 100644
index 000000000..d92311281
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+     id="text18">
+    <tspan
+       x="72.899757"
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+       id="tspan20">sink</tspan>
+    <tspan
+       x="72.899757"
+       y="242.61047"
+       id="tspan22">crop</tspan>
+    <tspan
+       x="72.899757"
+       y="258.61047"
+       id="tspan24">selection</tspan>
+  </text>
+  <text
+     style="font-style:normal;font-weight:normal;font-size:12.80000019px;font-family:sanserif;text-anchor:start;fill:#000000"
+     x="27.899757"
+     y="156.86047"
+     id="text26">
+    <tspan
+       x="27.899757"
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+       id="tspan28" />
+  </text>
+  <text
+     style="font-style:normal;font-weight:normal;font-size:12.80000019px;font-family:sanserif;text-anchor:start;fill:#a52a2a"
+     x="6.938117"
+     y="156.77448"
+     id="text30">
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+       id="tspan34">bus format</tspan>
+  </text>
+  <text
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+    <tspan
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+  </text>
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diff --git a/Documentation/userspace-api/media/v4l/tch-formats.rst b/Documentation/userspace-api/media/v4l/tch-formats.rst
new file mode 100644
index 000000000..8c941ff9e
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/tch-formats.rst
@@ -0,0 +1,18 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _tch-formats:
+
+*************
+Touch Formats
+*************
+
+These formats are used for :ref:`touch` interface only.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-tch-td16
+    pixfmt-tch-td08
+    pixfmt-tch-tu16
+    pixfmt-tch-tu08
diff --git a/Documentation/userspace-api/media/v4l/tuner.rst b/Documentation/userspace-api/media/v4l/tuner.rst
new file mode 100644
index 000000000..e2c53c3ab
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/tuner.rst
@@ -0,0 +1,85 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _tuner:
+
+*********************
+Tuners and Modulators
+*********************
+
+
+Tuners
+======
+
+Video input devices can have one or more tuners demodulating a RF
+signal. Each tuner is associated with one or more video inputs,
+depending on the number of RF connectors on the tuner. The ``type``
+field of the respective struct :c:type:`v4l2_input`
+returned by the :ref:`VIDIOC_ENUMINPUT` ioctl is
+set to ``V4L2_INPUT_TYPE_TUNER`` and its ``tuner`` field contains the
+index number of the tuner.
+
+Radio input devices have exactly one tuner with index zero, no video
+inputs.
+
+To query and change tuner properties applications use the
+:ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` and
+:ref:`VIDIOC_S_TUNER <VIDIOC_G_TUNER>` ioctls, respectively. The
+struct :c:type:`v4l2_tuner` returned by :ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>`
+also contains signal status information applicable when the tuner of the
+current video or radio input is queried.
+
+.. note::
+
+   :ref:`VIDIOC_S_TUNER <VIDIOC_G_TUNER>` does not switch the
+   current tuner, when there is more than one. The tuner is solely
+   determined by the current video input. Drivers must support both ioctls
+   and set the ``V4L2_CAP_TUNER`` flag in the struct :c:type:`v4l2_capability`
+   returned by the :ref:`VIDIOC_QUERYCAP` ioctl when the
+   device has one or more tuners.
+
+
+Modulators
+==========
+
+Video output devices can have one or more modulators, that modulate a
+video signal for radiation or connection to the antenna input of a TV
+set or video recorder. Each modulator is associated with one or more
+video outputs, depending on the number of RF connectors on the
+modulator. The ``type`` field of the respective struct
+:c:type:`v4l2_output` returned by the
+:ref:`VIDIOC_ENUMOUTPUT` ioctl is set to
+``V4L2_OUTPUT_TYPE_MODULATOR`` and its ``modulator`` field contains the
+index number of the modulator.
+
+Radio output devices have exactly one modulator with index zero, no
+video outputs.
+
+A video or radio device cannot support both a tuner and a modulator. Two
+separate device nodes will have to be used for such hardware, one that
+supports the tuner functionality and one that supports the modulator
+functionality. The reason is a limitation with the
+:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl where you
+cannot specify whether the frequency is for a tuner or a modulator.
+
+To query and change modulator properties applications use the
+:ref:`VIDIOC_G_MODULATOR <VIDIOC_G_MODULATOR>` and
+:ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` ioctl. Note that
+:ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` does not switch the current modulator, when there
+is more than one at all. The modulator is solely determined by the
+current video output. Drivers must support both ioctls and set the
+``V4L2_CAP_MODULATOR`` flag in the struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl when the device has
+one or more modulators.
+
+
+Radio Frequency
+===============
+
+To get and set the tuner or modulator radio frequency applications use
+the :ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` and
+:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl which both take
+a pointer to a struct :c:type:`v4l2_frequency`. These
+ioctls are used for TV and radio devices alike. Drivers must support
+both ioctls when the tuner or modulator ioctls are supported, or when
+the device is a radio device.
diff --git a/Documentation/userspace-api/media/v4l/user-func.rst b/Documentation/userspace-api/media/v4l/user-func.rst
new file mode 100644
index 000000000..53e604bd7
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/user-func.rst
@@ -0,0 +1,82 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _user-func:
+
+******************
+Function Reference
+******************
+
+
+.. toctree::
+    :maxdepth: 1
+
+    func-close
+    func-ioctl
+    vidioc-create-bufs
+    vidioc-cropcap
+    vidioc-dbg-g-chip-info
+    vidioc-dbg-g-register
+    vidioc-decoder-cmd
+    vidioc-dqevent
+    vidioc-dv-timings-cap
+    vidioc-encoder-cmd
+    vidioc-enumaudio
+    vidioc-enumaudioout
+    vidioc-enum-dv-timings
+    vidioc-enum-fmt
+    vidioc-enum-framesizes
+    vidioc-enum-frameintervals
+    vidioc-enum-freq-bands
+    vidioc-enuminput
+    vidioc-enumoutput
+    vidioc-enumstd
+    vidioc-expbuf
+    vidioc-g-audio
+    vidioc-g-audioout
+    vidioc-g-crop
+    vidioc-g-ctrl
+    vidioc-g-dv-timings
+    vidioc-g-edid
+    vidioc-g-enc-index
+    vidioc-g-ext-ctrls
+    vidioc-g-fbuf
+    vidioc-g-fmt
+    vidioc-g-frequency
+    vidioc-g-input
+    vidioc-g-jpegcomp
+    vidioc-g-modulator
+    vidioc-g-output
+    vidioc-g-parm
+    vidioc-g-priority
+    vidioc-g-selection
+    vidioc-g-sliced-vbi-cap
+    vidioc-g-std
+    vidioc-g-tuner
+    vidioc-log-status
+    vidioc-overlay
+    vidioc-prepare-buf
+    vidioc-qbuf
+    vidioc-querybuf
+    vidioc-querycap
+    vidioc-queryctrl
+    vidioc-query-dv-timings
+    vidioc-querystd
+    vidioc-reqbufs
+    vidioc-s-hw-freq-seek
+    vidioc-streamon
+    vidioc-subdev-enum-frame-interval
+    vidioc-subdev-enum-frame-size
+    vidioc-subdev-enum-mbus-code
+    vidioc-subdev-g-crop
+    vidioc-subdev-g-fmt
+    vidioc-subdev-g-frame-interval
+    vidioc-subdev-g-selection
+    vidioc-subdev-querycap
+    vidioc-subscribe-event
+    func-mmap
+    func-munmap
+    func-open
+    func-poll
+    func-read
+    func-select
+    func-write
diff --git a/Documentation/userspace-api/media/v4l/userp.rst b/Documentation/userspace-api/media/v4l/userp.rst
new file mode 100644
index 000000000..db224f9b6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/userp.rst
@@ -0,0 +1,122 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _userp:
+
+*****************************
+Streaming I/O (User Pointers)
+*****************************
+
+Input and output devices support this I/O method when the
+``V4L2_CAP_STREAMING`` flag in the ``capabilities`` field of struct
+:c:type:`v4l2_capability` returned by the
+:ref:`VIDIOC_QUERYCAP` ioctl is set. If the
+particular user pointer method (not only memory mapping) is supported
+must be determined by calling the :ref:`VIDIOC_REQBUFS` ioctl
+with the memory type set to ``V4L2_MEMORY_USERPTR``.
+
+This I/O method combines advantages of the read/write and memory mapping
+methods. Buffers (planes) are allocated by the application itself, and
+can reside for example in virtual or shared memory. Only pointers to
+data are exchanged, these pointers and meta-information are passed in
+struct :c:type:`v4l2_buffer` (or in struct
+:c:type:`v4l2_plane` in the multi-planar API case). The
+driver must be switched into user pointer I/O mode by calling the
+:ref:`VIDIOC_REQBUFS` with the desired buffer type.
+No buffers (planes) are allocated beforehand, consequently they are not
+indexed and cannot be queried like mapped buffers with the
+:ref:`VIDIOC_QUERYBUF <VIDIOC_QUERYBUF>` ioctl.
+
+Example: Initiating streaming I/O with user pointers
+====================================================
+
+.. code-block:: c
+
+    struct v4l2_requestbuffers reqbuf;
+
+    memset (&reqbuf, 0, sizeof (reqbuf));
+    reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    reqbuf.memory = V4L2_MEMORY_USERPTR;
+
+    if (ioctl (fd, VIDIOC_REQBUFS, &reqbuf) == -1) {
+	if (errno == EINVAL)
+	    printf ("Video capturing or user pointer streaming is not supported\\n");
+	else
+	    perror ("VIDIOC_REQBUFS");
+
+	exit (EXIT_FAILURE);
+    }
+
+Buffer (plane) addresses and sizes are passed on the fly with the
+:ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl. Although buffers are commonly
+cycled, applications can pass different addresses and sizes at each
+:ref:`VIDIOC_QBUF <VIDIOC_QBUF>` call. If required by the hardware the
+driver swaps memory pages within physical memory to create a continuous
+area of memory. This happens transparently to the application in the
+virtual memory subsystem of the kernel. When buffer pages have been
+swapped out to disk they are brought back and finally locked in physical
+memory for DMA. [#f1]_
+
+Filled or displayed buffers are dequeued with the
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. The driver can unlock the
+memory pages at any time between the completion of the DMA and this
+ioctl. The memory is also unlocked when
+:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` is called,
+:ref:`VIDIOC_REQBUFS`, or when the device is closed.
+Applications must take care not to free buffers without dequeuing.
+Firstly, the buffers remain locked for longer, wasting physical memory.
+Secondly the driver will not be notified when the memory is returned to
+the application's free list and subsequently reused for other purposes,
+possibly completing the requested DMA and overwriting valuable data.
+
+For capturing applications it is customary to enqueue a number of empty
+buffers, to start capturing and enter the read loop. Here the
+application waits until a filled buffer can be dequeued, and re-enqueues
+the buffer when the data is no longer needed. Output applications fill
+and enqueue buffers, when enough buffers are stacked up output is
+started. In the write loop, when the application runs out of free
+buffers it must wait until an empty buffer can be dequeued and reused.
+Two methods exist to suspend execution of the application until one or
+more buffers can be dequeued. By default :ref:`VIDIOC_DQBUF
+<VIDIOC_QBUF>` blocks when no buffer is in the outgoing queue. When the
+``O_NONBLOCK`` flag was given to the :c:func:`open()` function,
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` returns immediately with an ``EAGAIN``
+error code when no buffer is available. The :ref:`select()
+<func-select>` or :c:func:`poll()` function are always
+available.
+
+To start and stop capturing or output applications call the
+:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` and
+:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctl.
+
+.. note::
+
+   :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` removes all buffers from
+   both queues and unlocks all buffers as a side effect. Since there is no
+   notion of doing anything "now" on a multitasking system, if an
+   application needs to synchronize with another event it should examine
+   the struct :c:type:`v4l2_buffer` ``timestamp`` of captured or
+   outputted buffers.
+
+Drivers implementing user pointer I/O must support the
+:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`,
+:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`
+and :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls, the
+:c:func:`select()` and :c:func:`poll()` function. [#f2]_
+
+.. [#f1]
+   We expect that frequently used buffers are typically not swapped out.
+   Anyway, the process of swapping, locking or generating scatter-gather
+   lists may be time consuming. The delay can be masked by the depth of
+   the incoming buffer queue, and perhaps by maintaining caches assuming
+   a buffer will be soon enqueued again. On the other hand, to optimize
+   memory usage drivers can limit the number of buffers locked in
+   advance and recycle the most recently used buffers first. Of course,
+   the pages of empty buffers in the incoming queue need not be saved to
+   disk. Output buffers must be saved on the incoming and outgoing queue
+   because an application may share them with other processes.
+
+.. [#f2]
+   At the driver level :c:func:`select()` and :c:func:`poll()` are
+   the same, and :c:func:`select()` is too important to be optional.
+   The rest should be evident.
diff --git a/Documentation/userspace-api/media/v4l/v4l2-selection-flags.rst b/Documentation/userspace-api/media/v4l/v4l2-selection-flags.rst
new file mode 100644
index 000000000..3a834d050
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/v4l2-selection-flags.rst
@@ -0,0 +1,44 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-selection-flags:
+
+***************
+Selection flags
+***************
+
+.. tabularcolumns:: |p{5.2cm}|p{2.0cm}|p{6.5cm}|p{1.2cm}|p{1.6cm}|
+
+.. _v4l2-selection-flags-table:
+
+.. flat-table:: Selection flag definitions
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Flag name
+      - id
+      - Definition
+      - Valid for V4L2
+      - Valid for V4L2 subdev
+    * - ``V4L2_SEL_FLAG_GE``
+      - (1 << 0)
+      - Suggest the driver it should choose greater or equal rectangle (in
+	size) than was requested. Albeit the driver may choose a lesser
+	size, it will only do so due to hardware limitations. Without this
+	flag (and ``V4L2_SEL_FLAG_LE``) the behaviour is to choose the
+	closest possible rectangle.
+      - Yes
+      - Yes
+    * - ``V4L2_SEL_FLAG_LE``
+      - (1 << 1)
+      - Suggest the driver it should choose lesser or equal rectangle (in
+	size) than was requested. Albeit the driver may choose a greater
+	size, it will only do so due to hardware limitations.
+      - Yes
+      - Yes
+    * - ``V4L2_SEL_FLAG_KEEP_CONFIG``
+      - (1 << 2)
+      - The configuration must not be propagated to any further processing
+	steps. If this flag is not given, the configuration is propagated
+	inside the subdevice to all further processing steps.
+      - No
+      - Yes
diff --git a/Documentation/userspace-api/media/v4l/v4l2-selection-targets.rst b/Documentation/userspace-api/media/v4l/v4l2-selection-targets.rst
new file mode 100644
index 000000000..e877ebbdb
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/v4l2-selection-targets.rst
@@ -0,0 +1,71 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2-selection-targets:
+
+*****************
+Selection targets
+*****************
+
+The precise meaning of the selection targets may be dependent on which
+of the two interfaces they are used.
+
+
+.. _v4l2-selection-targets-table:
+
+.. tabularcolumns:: |p{6.0cm}|p{1.4cm}|p{7.4cm}|p{1.2cm}|p{1.4cm}|
+
+.. flat-table:: Selection target definitions
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Target name
+      - id
+      - Definition
+      - Valid for V4L2
+      - Valid for V4L2 subdev
+    * - ``V4L2_SEL_TGT_CROP``
+      - 0x0000
+      - Crop rectangle. Defines the cropped area.
+      - Yes
+      - Yes
+    * - ``V4L2_SEL_TGT_CROP_DEFAULT``
+      - 0x0001
+      - Suggested cropping rectangle that covers the "whole picture".
+        This includes only active pixels and excludes other non-active
+        pixels such as black pixels.
+      - Yes
+      - Yes
+    * - ``V4L2_SEL_TGT_CROP_BOUNDS``
+      - 0x0002
+      - Bounds of the crop rectangle. All valid crop rectangles fit inside
+	the crop bounds rectangle.
+      - Yes
+      - Yes
+    * - ``V4L2_SEL_TGT_NATIVE_SIZE``
+      - 0x0003
+      - The native size of the device, e.g. a sensor's pixel array.
+	``left`` and ``top`` fields are zero for this target.
+      - Yes
+      - Yes
+    * - ``V4L2_SEL_TGT_COMPOSE``
+      - 0x0100
+      - Compose rectangle. Used to configure scaling and composition.
+      - Yes
+      - Yes
+    * - ``V4L2_SEL_TGT_COMPOSE_DEFAULT``
+      - 0x0101
+      - Suggested composition rectangle that covers the "whole picture".
+      - Yes
+      - No
+    * - ``V4L2_SEL_TGT_COMPOSE_BOUNDS``
+      - 0x0102
+      - Bounds of the compose rectangle. All valid compose rectangles fit
+	inside the compose bounds rectangle.
+      - Yes
+      - Yes
+    * - ``V4L2_SEL_TGT_COMPOSE_PADDED``
+      - 0x0103
+      - The active area and all padding pixels that are inserted or
+	modified by hardware.
+      - Yes
+      - No
diff --git a/Documentation/userspace-api/media/v4l/v4l2.rst b/Documentation/userspace-api/media/v4l/v4l2.rst
new file mode 100644
index 000000000..ad7a2bf0c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/v4l2.rst
@@ -0,0 +1,418 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. include:: <isonum.txt>
+
+.. _v4l2spec:
+
+############################
+Part I - Video for Linux API
+############################
+
+This part describes the Video for Linux API version 2 (V4L2 API) specification.
+
+**Revision 4.5**
+
+.. only:: html
+
+   .. class:: toc-title
+
+        Table of Contents
+
+.. toctree::
+    :numbered:
+    :maxdepth: 5
+
+    common
+    pixfmt
+    io
+    devices
+    libv4l
+    compat
+    user-func
+    common-defs
+    videodev
+    capture-example
+    v4l2grab-example
+    biblio
+
+
+**********************
+Revision and Copyright
+**********************
+
+Authors, in alphabetical order:
+
+- Ailus, Sakari <sakari.ailus@iki.fi>
+
+  - Subdev selections API.
+
+- Carvalho Chehab, Mauro <mchehab+samsung@kernel.org>
+
+  - Documented libv4l, designed and added v4l2grab example, Remote Controller chapter.
+
+- Dirks, Bill
+
+  - Original author of the V4L2 API and documentation.
+
+- Figa, Tomasz <tfiga@chromium.org>
+
+  - Documented the memory-to-memory decoder interface.
+  - Documented the memory-to-memory encoder interface.
+
+- H Schimek, Michael <mschimek@gmx.at>
+
+  - Original author of the V4L2 API and documentation.
+
+- Karicheri, Muralidharan <m-karicheri2@ti.com>
+
+  - Documented the Digital Video timings API.
+
+- Osciak, Pawel <posciak@chromium.org>
+
+  - Documented the memory-to-memory decoder interface.
+  - Documented the memory-to-memory encoder interface.
+
+- Osciak, Pawel <pawel@osciak.com>
+
+  - Designed and documented the multi-planar API.
+
+- Palosaari, Antti <crope@iki.fi>
+
+  - SDR API.
+
+- Ribalda, Ricardo
+
+  - Introduce HSV formats and other minor changes.
+
+- Rubli, Martin
+
+  - Designed and documented the VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS ioctls.
+
+- Walls, Andy <awalls@md.metrocast.net>
+
+  - Documented the fielded V4L2_MPEG_STREAM_VBI_FMT_IVTV MPEG stream embedded, sliced VBI data format in this specification.
+
+- Verkuil, Hans <hverkuil@xs4all.nl>
+
+  - Designed and documented the VIDIOC_LOG_STATUS ioctl, the extended control ioctls, major parts of the sliced VBI API, the MPEG encoder and decoder APIs and the DV Timings API.
+
+**Copyright** |copy| 1999-2018: Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab, Pawel Osciak, Sakari Ailus & Antti Palosaari, Tomasz Figa
+
+Except when explicitly stated as GPL, programming examples within this
+part can be used and distributed without restrictions.
+
+****************
+Revision History
+****************
+
+:revision: 4.10 / 2016-07-15 (*rr*)
+
+Introduce HSV formats.
+
+
+:revision: 4.5 / 2015-10-29 (*rr*)
+
+Extend VIDIOC_G_EXT_CTRLS;. Replace ctrl_class with a new union with
+ctrl_class and which. Which is used to select the current value of the
+control or the default value.
+
+
+:revision: 4.4 / 2015-05-26 (*ap*)
+
+Renamed V4L2_TUNER_ADC to V4L2_TUNER_SDR. Added
+V4L2_CID_RF_TUNER_RF_GAIN control. Added transmitter support for
+Software Defined Radio (SDR) Interface.
+
+
+:revision: 4.1 / 2015-02-13 (*mcc*)
+
+Fix documentation for media controller device nodes and add support for
+DVB device nodes. Add support for Tuner sub-device.
+
+
+:revision: 3.19 / 2014-12-05 (*hv*)
+
+Rewrote Colorspace chapter, added new enum
+:c:type:`v4l2_ycbcr_encoding` and enum
+:c:type:`v4l2_quantization` fields to struct
+:c:type:`v4l2_pix_format`, struct
+:c:type:`v4l2_pix_format_mplane` and struct
+:c:type:`v4l2_mbus_framefmt`.
+
+
+:revision: 3.17 / 2014-08-04 (*lp, hv*)
+
+Extended struct :c:type:`v4l2_pix_format`. Added
+format flags. Added compound control types and VIDIOC_QUERY_EXT_CTRL.
+
+
+:revision: 3.15 / 2014-02-03 (*hv, ap*)
+
+Update several sections of "Common API Elements": "Opening and Closing
+Devices" "Querying Capabilities", "Application Priority", "Video Inputs
+and Outputs", "Audio Inputs and Outputs" "Tuners and Modulators", "Video
+Standards" and "Digital Video (DV) Timings". Added SDR API.
+
+
+:revision: 3.14 / 2013-11-25 (*rr*)
+
+Set width and height as unsigned on v4l2_rect.
+
+
+:revision: 3.11 / 2013-05-26 (*hv*)
+
+Remove obsolete VIDIOC_DBG_G_CHIP_IDENT ioctl.
+
+
+:revision: 3.10 / 2013-03-25 (*hv*)
+
+Remove obsolete and unused DV_PRESET ioctls: VIDIOC_G_DV_PRESET,
+VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and
+VIDIOC_ENUM_DV_PRESET. Remove the related v4l2_input/output
+capability flags V4L2_IN_CAP_PRESETS and V4L2_OUT_CAP_PRESETS.
+Added VIDIOC_DBG_G_CHIP_INFO.
+
+
+:revision: 3.9 / 2012-12-03 (*sa, sn*)
+
+Added timestamp types to v4l2_buffer. Added
+V4L2_EVENT_CTRL_CH_RANGE control event changes flag.
+
+
+:revision: 3.6 / 2012-07-02 (*hv*)
+
+Added VIDIOC_ENUM_FREQ_BANDS.
+
+
+:revision: 3.5 / 2012-05-07 (*sa, sn, hv*)
+
+Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 subdev selections API.
+Improved the description of V4L2_CID_COLORFX control, added
+V4L2_CID_COLORFX_CBCR control. Added camera controls
+V4L2_CID_AUTO_EXPOSURE_BIAS,
+V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
+V4L2_CID_IMAGE_STABILIZATION, V4L2_CID_ISO_SENSITIVITY,
+V4L2_CID_ISO_SENSITIVITY_AUTO, V4L2_CID_EXPOSURE_METERING,
+V4L2_CID_SCENE_MODE, V4L2_CID_3A_LOCK,
+V4L2_CID_AUTO_FOCUS_START, V4L2_CID_AUTO_FOCUS_STOP,
+V4L2_CID_AUTO_FOCUS_STATUS and V4L2_CID_AUTO_FOCUS_RANGE. Added
+VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMINGS and
+VIDIOC_DV_TIMINGS_CAP.
+
+
+:revision: 3.4 / 2012-01-25 (*sn*)
+
+Added :ref:`JPEG compression control class. <jpeg-controls>`
+
+
+:revision: 3.3 / 2012-01-11 (*hv*)
+
+Added device_caps field to struct v4l2_capabilities.
+
+
+:revision: 3.2 / 2011-08-26 (*hv*)
+
+Added V4L2_CTRL_FLAG_VOLATILE.
+
+
+:revision: 3.1 / 2011-06-27 (*mcc, po, hv*)
+
+Documented that VIDIOC_QUERYCAP now returns a per-subsystem version
+instead of a per-driver one. Standardize an error code for invalid
+ioctl. Added V4L2_CTRL_TYPE_BITMASK.
+
+
+:revision: 2.6.39 / 2011-03-01 (*mcc, po*)
+
+Removed VIDIOC_*_OLD from videodev2.h header and update it to reflect
+latest changes. Added the :ref:`multi-planar API <planar-apis>`.
+
+
+:revision: 2.6.37 / 2010-08-06 (*hv*)
+
+Removed obsolete vtx (videotext) API.
+
+
+:revision: 2.6.33 / 2009-12-03 (*mk*)
+
+Added documentation for the Digital Video timings API.
+
+
+:revision: 2.6.32 / 2009-08-31 (*mcc*)
+
+Now, revisions will match the kernel version where the V4L2 API changes
+will be used by the Linux Kernel. Also added Remote Controller chapter.
+
+
+:revision: 0.29 / 2009-08-26 (*ev*)
+
+Added documentation for string controls and for FM Transmitter controls.
+
+
+:revision: 0.28 / 2009-08-26 (*gl*)
+
+Added V4L2_CID_BAND_STOP_FILTER documentation.
+
+
+:revision: 0.27 / 2009-08-15 (*mcc*)
+
+Added libv4l and Remote Controller documentation; added v4l2grab and
+keytable application examples.
+
+
+:revision: 0.26 / 2009-07-23 (*hv*)
+
+Finalized the RDS capture API. Added modulator and RDS encoder
+capabilities. Added support for string controls.
+
+
+:revision: 0.25 / 2009-01-18 (*hv*)
+
+Added pixel formats VYUY, NV16 and NV61, and changed the debug ioctls
+VIDIOC_DBG_G/S_REGISTER and VIDIOC_DBG_G_CHIP_IDENT. Added camera
+controls V4L2_CID_ZOOM_ABSOLUTE, V4L2_CID_ZOOM_RELATIVE,
+V4L2_CID_ZOOM_CONTINUOUS and V4L2_CID_PRIVACY.
+
+
+:revision: 0.24 / 2008-03-04 (*mhs*)
+
+Added pixel formats Y16 and SBGGR16, new controls and a camera controls
+class. Removed VIDIOC_G/S_MPEGCOMP.
+
+
+:revision: 0.23 / 2007-08-30 (*mhs*)
+
+Fixed a typo in VIDIOC_DBG_G/S_REGISTER. Clarified the byte order of
+packed pixel formats.
+
+
+:revision: 0.22 / 2007-08-29 (*mhs*)
+
+Added the Video Output Overlay interface, new MPEG controls,
+V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERLACED_BT,
+VIDIOC_DBG_G/S_REGISTER, VIDIOC\_(TRY\_)ENCODER_CMD,
+VIDIOC_G_CHIP_IDENT, VIDIOC_G_ENC_INDEX, new pixel formats.
+Clarifications in the cropping chapter, about RGB pixel formats, the
+mmap(), poll(), select(), read() and write() functions. Typographical
+fixes.
+
+
+:revision: 0.21 / 2006-12-19 (*mhs*)
+
+Fixed a link in the VIDIOC_G_EXT_CTRLS section.
+
+
+:revision: 0.20 / 2006-11-24 (*mhs*)
+
+Clarified the purpose of the audioset field in struct v4l2_input and
+v4l2_output.
+
+
+:revision: 0.19 / 2006-10-19 (*mhs*)
+
+Documented V4L2_PIX_FMT_RGB444.
+
+
+:revision: 0.18 / 2006-10-18 (*mhs*)
+
+Added the description of extended controls by Hans Verkuil. Linked
+V4L2_PIX_FMT_MPEG to V4L2_CID_MPEG_STREAM_TYPE.
+
+
+:revision: 0.17 / 2006-10-12 (*mhs*)
+
+Corrected V4L2_PIX_FMT_HM12 description.
+
+
+:revision: 0.16 / 2006-10-08 (*mhs*)
+
+VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS are now part
+of the API.
+
+
+:revision: 0.15 / 2006-09-23 (*mhs*)
+
+Cleaned up the bibliography, added BT.653 and BT.1119.
+capture.c/start_capturing() for user pointer I/O did not initialize the
+buffer index. Documented the V4L MPEG and MJPEG VID_TYPEs and
+V4L2_PIX_FMT_SBGGR8. Updated the list of reserved pixel formats. See
+the history chapter for API changes.
+
+
+:revision: 0.14 / 2006-09-14 (*mr*)
+
+Added VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS proposal
+for frame format enumeration of digital devices.
+
+
+:revision: 0.13 / 2006-04-07 (*mhs*)
+
+Corrected the description of struct v4l2_window clips. New V4L2_STD\_
+and V4L2_TUNER_MODE_LANG1_LANG2 defines.
+
+
+:revision: 0.12 / 2006-02-03 (*mhs*)
+
+Corrected the description of struct v4l2_captureparm and
+v4l2_outputparm.
+
+
+:revision: 0.11 / 2006-01-27 (*mhs*)
+
+Improved the description of struct v4l2_tuner.
+
+
+:revision: 0.10 / 2006-01-10 (*mhs*)
+
+VIDIOC_G_INPUT and VIDIOC_S_PARM clarifications.
+
+
+:revision: 0.9 / 2005-11-27 (*mhs*)
+
+Improved the 525 line numbering diagram. Hans Verkuil and I rewrote the
+sliced VBI section. He also contributed a VIDIOC_LOG_STATUS page.
+Fixed VIDIOC_S_STD call in the video standard selection example.
+Various updates.
+
+
+:revision: 0.8 / 2004-10-04 (*mhs*)
+
+Somehow a piece of junk slipped into the capture example, removed.
+
+
+:revision: 0.7 / 2004-09-19 (*mhs*)
+
+Fixed video standard selection, control enumeration, downscaling and
+aspect example. Added read and user pointer i/o to video capture
+example.
+
+
+:revision: 0.6 / 2004-08-01 (*mhs*)
+
+v4l2_buffer changes, added video capture example, various corrections.
+
+
+:revision: 0.5 / 2003-11-05 (*mhs*)
+
+Pixel format erratum.
+
+
+:revision: 0.4 / 2003-09-17 (*mhs*)
+
+Corrected source and Makefile to generate a PDF. SGML fixes. Added
+latest API changes. Closed gaps in the history chapter.
+
+
+:revision: 0.3 / 2003-02-05 (*mhs*)
+
+Another draft, more corrections.
+
+
+:revision: 0.2 / 2003-01-15 (*mhs*)
+
+Second draft, with corrections pointed out by Gerd Knorr.
+
+
+:revision: 0.1 / 2002-12-01 (*mhs*)
+
+First draft, based on documentation by Bill Dirks and discussions on the
+V4L mailing list.
diff --git a/Documentation/userspace-api/media/v4l/v4l2grab-example.rst b/Documentation/userspace-api/media/v4l/v4l2grab-example.rst
new file mode 100644
index 000000000..b323be42c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/v4l2grab-example.rst
@@ -0,0 +1,17 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _v4l2grab-example:
+
+**********************************
+Video Grabber example using libv4l
+**********************************
+
+This program demonstrates how to grab V4L2 images in ppm format by using
+libv4l handlers. The advantage is that this grabber can potentially work
+with any V4L2 driver.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    v4l2grab.c
diff --git a/Documentation/userspace-api/media/v4l/v4l2grab.c.rst b/Documentation/userspace-api/media/v4l/v4l2grab.c.rst
new file mode 100644
index 000000000..eaa0f9504
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/v4l2grab.c.rst
@@ -0,0 +1,169 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+file: media/v4l/v4l2grab.c
+==========================
+
+.. code-block:: c
+
+    /* V4L2 video picture grabber
+       Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@kernel.org>
+
+       This program is free software; you can redistribute it and/or modify
+       it under the terms of the GNU General Public License as published by
+       the Free Software Foundation version 2 of the License.
+
+       This program is distributed in the hope that it will be useful,
+       but WITHOUT ANY WARRANTY; without even the implied warranty of
+       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+       GNU General Public License for more details.
+     */
+
+    #include <stdio.h>
+    #include <stdlib.h>
+    #include <string.h>
+    #include <fcntl.h>
+    #include <errno.h>
+    #include <sys/ioctl.h>
+    #include <sys/types.h>
+    #include <sys/time.h>
+    #include <sys/mman.h>
+    #include <linux/videodev2.h>
+    #include "../libv4l/include/libv4l2.h"
+
+    #define CLEAR(x) memset(&(x), 0, sizeof(x))
+
+    struct buffer {
+	    void   *start;
+	    size_t length;
+    };
+
+    static void xioctl(int fh, int request, void *arg)
+    {
+	    int r;
+
+	    do {
+		    r = v4l2_ioctl(fh, request, arg);
+	    } while (r == -1 && ((errno == EINTR) || (errno == EAGAIN)));
+
+	    if (r == -1) {
+		    fprintf(stderr, "error %d, %s\\n", errno, strerror(errno));
+		    exit(EXIT_FAILURE);
+	    }
+    }
+
+    int main(int argc, char **argv)
+    {
+	    struct v4l2_format              fmt;
+	    struct v4l2_buffer              buf;
+	    struct v4l2_requestbuffers      req;
+	    enum v4l2_buf_type              type;
+	    fd_set                          fds;
+	    struct timeval                  tv;
+	    int                             r, fd = -1;
+	    unsigned int                    i, n_buffers;
+	    char                            *dev_name = "/dev/video0";
+	    char                            out_name[256];
+	    FILE                            *fout;
+	    struct buffer                   *buffers;
+
+	    fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0);
+	    if (fd < 0) {
+		    perror("Cannot open device");
+		    exit(EXIT_FAILURE);
+	    }
+
+	    CLEAR(fmt);
+	    fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	    fmt.fmt.pix.width       = 640;
+	    fmt.fmt.pix.height      = 480;
+	    fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
+	    fmt.fmt.pix.field       = V4L2_FIELD_INTERLACED;
+	    xioctl(fd, VIDIOC_S_FMT, &fmt);
+	    if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) {
+		    printf("Libv4l didn't accept RGB24 format. Can't proceed.\\n");
+		    exit(EXIT_FAILURE);
+	    }
+	    if ((fmt.fmt.pix.width != 640) || (fmt.fmt.pix.height != 480))
+		    printf("Warning: driver is sending image at %dx%d\\n",
+			    fmt.fmt.pix.width, fmt.fmt.pix.height);
+
+	    CLEAR(req);
+	    req.count = 2;
+	    req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	    req.memory = V4L2_MEMORY_MMAP;
+	    xioctl(fd, VIDIOC_REQBUFS, &req);
+
+	    buffers = calloc(req.count, sizeof(*buffers));
+	    for (n_buffers = 0; n_buffers < req.count; ++n_buffers) {
+		    CLEAR(buf);
+
+		    buf.type        = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    buf.memory      = V4L2_MEMORY_MMAP;
+		    buf.index       = n_buffers;
+
+		    xioctl(fd, VIDIOC_QUERYBUF, &buf);
+
+		    buffers[n_buffers].length = buf.length;
+		    buffers[n_buffers].start = v4l2_mmap(NULL, buf.length,
+				  PROT_READ | PROT_WRITE, MAP_SHARED,
+				  fd, buf.m.offset);
+
+		    if (MAP_FAILED == buffers[n_buffers].start) {
+			    perror("mmap");
+			    exit(EXIT_FAILURE);
+		    }
+	    }
+
+	    for (i = 0; i < n_buffers; ++i) {
+		    CLEAR(buf);
+		    buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    buf.memory = V4L2_MEMORY_MMAP;
+		    buf.index = i;
+		    xioctl(fd, VIDIOC_QBUF, &buf);
+	    }
+	    type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+	    xioctl(fd, VIDIOC_STREAMON, &type);
+	    for (i = 0; i < 20; i++) {
+		    do {
+			    FD_ZERO(&fds);
+			    FD_SET(fd, &fds);
+
+			    /* Timeout. */
+			    tv.tv_sec = 2;
+			    tv.tv_usec = 0;
+
+			    r = select(fd + 1, &fds, NULL, NULL, &tv);
+		    } while ((r == -1 && (errno = EINTR)));
+		    if (r == -1) {
+			    perror("select");
+			    return errno;
+		    }
+
+		    CLEAR(buf);
+		    buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		    buf.memory = V4L2_MEMORY_MMAP;
+		    xioctl(fd, VIDIOC_DQBUF, &buf);
+
+		    sprintf(out_name, "out%03d.ppm", i);
+		    fout = fopen(out_name, "w");
+		    if (!fout) {
+			    perror("Cannot open image");
+			    exit(EXIT_FAILURE);
+		    }
+		    fprintf(fout, "P6\\n%d %d 255\\n",
+			    fmt.fmt.pix.width, fmt.fmt.pix.height);
+		    fwrite(buffers[buf.index].start, buf.bytesused, 1, fout);
+		    fclose(fout);
+
+		    xioctl(fd, VIDIOC_QBUF, &buf);
+	    }
+
+	    type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	    xioctl(fd, VIDIOC_STREAMOFF, &type);
+	    for (i = 0; i < n_buffers; ++i)
+		    v4l2_munmap(buffers[i].start, buffers[i].length);
+	    v4l2_close(fd);
+
+	    return 0;
+    }
diff --git a/Documentation/userspace-api/media/v4l/vbi_525.svg b/Documentation/userspace-api/media/v4l/vbi_525.svg
new file mode 100644
index 000000000..b01086d46
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vbi_525.svg
@@ -0,0 +1,812 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later -->
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
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diff --git a/Documentation/userspace-api/media/v4l/video.rst b/Documentation/userspace-api/media/v4l/video.rst
new file mode 100644
index 000000000..f8f69a576
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/video.rst
@@ -0,0 +1,68 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _video:
+
+************************
+Video Inputs and Outputs
+************************
+
+Video inputs and outputs are physical connectors of a device. These can
+be for example: RF connectors (antenna/cable), CVBS a.k.a. Composite
+Video, S-Video and RGB connectors. Camera sensors are also considered to
+be a video input. Video and VBI capture devices have inputs. Video and
+VBI output devices have outputs, at least one each. Radio devices have
+no video inputs or outputs.
+
+To learn about the number and attributes of the available inputs and
+outputs applications can enumerate them with the
+:ref:`VIDIOC_ENUMINPUT` and
+:ref:`VIDIOC_ENUMOUTPUT` ioctl, respectively. The
+struct :c:type:`v4l2_input` returned by the
+:ref:`VIDIOC_ENUMINPUT` ioctl also contains signal
+status information applicable when the current video input is queried.
+
+The :ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` and
+:ref:`VIDIOC_G_OUTPUT <VIDIOC_G_OUTPUT>` ioctls return the index of
+the current video input or output. To select a different input or output
+applications call the :ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>` and
+:ref:`VIDIOC_S_OUTPUT <VIDIOC_G_OUTPUT>` ioctls. Drivers must
+implement all the input ioctls when the device has one or more inputs,
+all the output ioctls when the device has one or more outputs.
+
+Example: Information about the current video input
+==================================================
+
+.. code-block:: c
+
+    struct v4l2_input input;
+    int index;
+
+    if (-1 == ioctl(fd, VIDIOC_G_INPUT, &index)) {
+	perror("VIDIOC_G_INPUT");
+	exit(EXIT_FAILURE);
+    }
+
+    memset(&input, 0, sizeof(input));
+    input.index = index;
+
+    if (-1 == ioctl(fd, VIDIOC_ENUMINPUT, &input)) {
+	perror("VIDIOC_ENUMINPUT");
+	exit(EXIT_FAILURE);
+    }
+
+    printf("Current input: %s\\n", input.name);
+
+
+Example: Switching to the first video input
+===========================================
+
+.. code-block:: c
+
+    int index;
+
+    index = 0;
+
+    if (-1 == ioctl(fd, VIDIOC_S_INPUT, &index)) {
+	perror("VIDIOC_S_INPUT");
+	exit(EXIT_FAILURE);
+    }
diff --git a/Documentation/userspace-api/media/v4l/videodev.rst b/Documentation/userspace-api/media/v4l/videodev.rst
new file mode 100644
index 000000000..c866fec41
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/videodev.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _videodev:
+
+*******************************
+Video For Linux Two Header File
+*******************************
+
+.. kernel-include:: $BUILDDIR/videodev2.h.rst
diff --git a/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst b/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst
new file mode 100644
index 000000000..b06e5b528
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-create-bufs.rst
@@ -0,0 +1,132 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_CREATE_BUFS:
+
+************************
+ioctl VIDIOC_CREATE_BUFS
+************************
+
+Name
+====
+
+VIDIOC_CREATE_BUFS - Create buffers for Memory Mapped or User Pointer or DMA Buffer I/O
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_CREATE_BUFS
+
+``int ioctl(int fd, VIDIOC_CREATE_BUFS, struct v4l2_create_buffers *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_create_buffers`.
+
+Description
+===========
+
+This ioctl is used to create buffers for :ref:`memory mapped <mmap>`
+or :ref:`user pointer <userp>` or :ref:`DMA buffer <dmabuf>` I/O. It
+can be used as an alternative or in addition to the
+:ref:`VIDIOC_REQBUFS` ioctl, when a tighter control
+over buffers is required. This ioctl can be called multiple times to
+create buffers of different sizes.
+
+To allocate the device buffers applications must initialize the relevant
+fields of the struct :c:type:`v4l2_create_buffers` structure. The
+``count`` field must be set to the number of requested buffers, the
+``memory`` field specifies the requested I/O method and the ``reserved``
+array must be zeroed.
+
+The ``format`` field specifies the image format that the buffers must be
+able to handle. The application has to fill in this struct
+:c:type:`v4l2_format`. Usually this will be done using the
+:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` or
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctls to ensure that the
+requested format is supported by the driver. Based on the format's
+``type`` field the requested buffer size (for single-planar) or plane
+sizes (for multi-planar formats) will be used for the allocated buffers.
+The driver may return an error if the size(s) are not supported by the
+hardware (usually because they are too small).
+
+The buffers created by this ioctl will have as minimum size the size
+defined by the ``format.pix.sizeimage`` field (or the corresponding
+fields for other format types). Usually if the ``format.pix.sizeimage``
+field is less than the minimum required for the given format, then an
+error will be returned since drivers will typically not allow this. If
+it is larger, then the value will be used as-is. In other words, the
+driver may reject the requested size, but if it is accepted the driver
+will use it unchanged.
+
+When the ioctl is called with a pointer to this structure the driver
+will attempt to allocate up to the requested number of buffers and store
+the actual number allocated and the starting index in the ``count`` and
+the ``index`` fields respectively. On return ``count`` can be smaller
+than the number requested.
+
+.. c:type:: v4l2_create_buffers
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_create_buffers
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - The starting buffer index, returned by the driver.
+    * - __u32
+      - ``count``
+      - The number of buffers requested or granted. If count == 0, then
+	:ref:`VIDIOC_CREATE_BUFS` will set ``index`` to the current number of
+	created buffers, and it will check the validity of ``memory`` and
+	``format.type``. If those are invalid -1 is returned and errno is
+	set to ``EINVAL`` error code, otherwise :ref:`VIDIOC_CREATE_BUFS` returns
+	0. It will never set errno to ``EBUSY`` error code in this particular
+	case.
+    * - __u32
+      - ``memory``
+      - Applications set this field to ``V4L2_MEMORY_MMAP``,
+	``V4L2_MEMORY_DMABUF`` or ``V4L2_MEMORY_USERPTR``. See
+	:c:type:`v4l2_memory`
+    * - struct :c:type:`v4l2_format`
+      - ``format``
+      - Filled in by the application, preserved by the driver.
+    * - __u32
+      - ``capabilities``
+      - Set by the driver. If 0, then the driver doesn't support
+        capabilities. In that case all you know is that the driver is
+	guaranteed to support ``V4L2_MEMORY_MMAP`` and *might* support
+	other :c:type:`v4l2_memory` types. It will not support any other
+	capabilities. See :ref:`here <v4l2-buf-capabilities>` for a list of the
+	capabilities.
+
+	If you want to just query the capabilities without making any
+	other changes, then set ``count`` to 0, ``memory`` to
+	``V4L2_MEMORY_MMAP`` and ``format.type`` to the buffer type.
+
+    * - __u32
+      - ``reserved``\ [7]
+      - A place holder for future extensions. Drivers and applications
+	must set the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+ENOMEM
+    No memory to allocate buffers for :ref:`memory mapped <mmap>` I/O.
+
+EINVAL
+    The buffer type (``format.type`` field), requested I/O method
+    (``memory``) or format (``format`` field) is not valid.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-cropcap.rst b/Documentation/userspace-api/media/v4l/vidioc-cropcap.rst
new file mode 100644
index 000000000..00c31410d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-cropcap.rst
@@ -0,0 +1,133 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_CROPCAP:
+
+********************
+ioctl VIDIOC_CROPCAP
+********************
+
+Name
+====
+
+VIDIOC_CROPCAP - Information about the video cropping and scaling abilities
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_CROPCAP
+
+``int ioctl(int fd, VIDIOC_CROPCAP, struct v4l2_cropcap *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_cropcap`.
+
+Description
+===========
+
+Applications use this function to query the cropping limits, the pixel
+aspect of images and to calculate scale factors. They set the ``type``
+field of a v4l2_cropcap structure to the respective buffer (stream)
+type and call the :ref:`VIDIOC_CROPCAP` ioctl with a pointer to this
+structure. Drivers fill the rest of the structure. The results are
+constant except when switching the video standard. Remember this switch
+can occur implicit when switching the video input or output.
+
+This ioctl must be implemented for video capture or output devices that
+support cropping and/or scaling and/or have non-square pixels, and for
+overlay devices.
+
+.. c:type:: v4l2_cropcap
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_cropcap
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of the data stream, set by the application. Only these types
+	are valid here: ``V4L2_BUF_TYPE_VIDEO_CAPTURE``, ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``,
+	``V4L2_BUF_TYPE_VIDEO_OUTPUT``, ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE`` and
+	``V4L2_BUF_TYPE_VIDEO_OVERLAY``. See :c:type:`v4l2_buf_type` and the note below.
+    * - struct :ref:`v4l2_rect <v4l2-rect-crop>`
+      - ``bounds``
+      - Defines the window within capturing or output is possible, this
+	may exclude for example the horizontal and vertical blanking
+	areas. The cropping rectangle cannot exceed these limits. Width
+	and height are defined in pixels, the driver writer is free to
+	choose origin and units of the coordinate system in the analog
+	domain.
+    * - struct :ref:`v4l2_rect <v4l2-rect-crop>`
+      - ``defrect``
+      - Default cropping rectangle, it shall cover the "whole picture".
+	Assuming pixel aspect 1/1 this could be for example a 640 × 480
+	rectangle for NTSC, a 768 × 576 rectangle for PAL and SECAM
+	centered over the active picture area. The same co-ordinate system
+	as for ``bounds`` is used.
+    * - struct :c:type:`v4l2_fract`
+      - ``pixelaspect``
+      - This is the pixel aspect (y / x) when no scaling is applied, the
+	ratio of the actual sampling frequency and the frequency required
+	to get square pixels.
+
+	When cropping coordinates refer to square pixels, the driver sets
+	``pixelaspect`` to 1/1. Other common values are 54/59 for PAL and
+	SECAM, 11/10 for NTSC sampled according to [:ref:`itu601`].
+
+.. note::
+   Unfortunately in the case of multiplanar buffer types
+   (``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` and ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``)
+   this API was messed up with regards to how the :c:type:`v4l2_cropcap` ``type`` field
+   should be filled in. Some drivers only accepted the ``_MPLANE`` buffer type while
+   other drivers only accepted a non-multiplanar buffer type (i.e. without the
+   ``_MPLANE`` at the end).
+
+   Starting with kernel 4.13 both variations are allowed.
+
+
+.. _v4l2-rect-crop:
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_rect
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __s32
+      - ``left``
+      - Horizontal offset of the top, left corner of the rectangle, in
+	pixels.
+    * - __s32
+      - ``top``
+      - Vertical offset of the top, left corner of the rectangle, in
+	pixels.
+    * - __u32
+      - ``width``
+      - Width of the rectangle, in pixels.
+    * - __u32
+      - ``height``
+      - Height of the rectangle, in pixels.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_cropcap` ``type`` is
+    invalid.
+
+ENODATA
+    Cropping is not supported for this input or output.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-dbg-g-chip-info.rst b/Documentation/userspace-api/media/v4l/vidioc-dbg-g-chip-info.rst
new file mode 100644
index 000000000..bde6e952b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-dbg-g-chip-info.rst
@@ -0,0 +1,155 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_DBG_G_CHIP_INFO:
+
+****************************
+ioctl VIDIOC_DBG_G_CHIP_INFO
+****************************
+
+Name
+====
+
+VIDIOC_DBG_G_CHIP_INFO - Identify the chips on a TV card
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_DBG_G_CHIP_INFO
+
+``int ioctl(int fd, VIDIOC_DBG_G_CHIP_INFO, struct v4l2_dbg_chip_info *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_dbg_chip_info`.
+
+Description
+===========
+
+.. note::
+
+    This is an :ref:`experimental` interface and may
+    change in the future.
+
+For driver debugging purposes this ioctl allows test applications to
+query the driver about the chips present on the TV card. Regular
+applications must not use it. When you found a chip specific bug, please
+contact the linux-media mailing list
+(`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__)
+so it can be fixed.
+
+Additionally the Linux kernel must be compiled with the
+``CONFIG_VIDEO_ADV_DEBUG`` option to enable this ioctl.
+
+To query the driver applications must initialize the ``match.type`` and
+``match.addr`` or ``match.name`` fields of a struct
+:c:type:`v4l2_dbg_chip_info` and call
+:ref:`VIDIOC_DBG_G_CHIP_INFO` with a pointer to this structure. On success
+the driver stores information about the selected chip in the ``name``
+and ``flags`` fields.
+
+When ``match.type`` is ``V4L2_CHIP_MATCH_BRIDGE``, ``match.addr``
+selects the nth bridge 'chip' on the TV card. You can enumerate all
+chips by starting at zero and incrementing ``match.addr`` by one until
+:ref:`VIDIOC_DBG_G_CHIP_INFO` fails with an ``EINVAL`` error code. The number
+zero always selects the bridge chip itself, e. g. the chip connected to
+the PCI or USB bus. Non-zero numbers identify specific parts of the
+bridge chip such as an AC97 register block.
+
+When ``match.type`` is ``V4L2_CHIP_MATCH_SUBDEV``, ``match.addr``
+selects the nth sub-device. This allows you to enumerate over all
+sub-devices.
+
+On success, the ``name`` field will contain a chip name and the
+``flags`` field will contain ``V4L2_CHIP_FL_READABLE`` if the driver
+supports reading registers from the device or ``V4L2_CHIP_FL_WRITABLE``
+if the driver supports writing registers to the device.
+
+We recommended the v4l2-dbg utility over calling this ioctl directly. It
+is available from the LinuxTV v4l-dvb repository; see
+`https://linuxtv.org/repo/ <https://linuxtv.org/repo/>`__ for access
+instructions.
+
+.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}|
+
+.. _name-v4l2-dbg-match:
+
+.. flat-table:: struct v4l2_dbg_match
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - See :ref:`name-chip-match-types` for a list of possible types.
+    * - union {
+      - (anonymous)
+    * - __u32
+      - ``addr``
+      - Match a chip by this number, interpreted according to the ``type``
+	field.
+    * - char
+      - ``name[32]``
+      - Match a chip by this name, interpreted according to the ``type``
+	field. Currently unused.
+    * - }
+      -
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_dbg_chip_info
+
+.. flat-table:: struct v4l2_dbg_chip_info
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - struct v4l2_dbg_match
+      - ``match``
+      - How to match the chip, see :ref:`name-v4l2-dbg-match`.
+    * - char
+      - ``name[32]``
+      - The name of the chip.
+    * - __u32
+      - ``flags``
+      - Set by the driver. If ``V4L2_CHIP_FL_READABLE`` is set, then the
+	driver supports reading registers from the device. If
+	``V4L2_CHIP_FL_WRITABLE`` is set, then it supports writing
+	registers.
+    * - __u32
+      - ``reserved[8]``
+      - Reserved fields, both application and driver must set these to 0.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _name-chip-match-types:
+
+.. flat-table:: Chip Match Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_CHIP_MATCH_BRIDGE``
+      - 0
+      - Match the nth chip on the card, zero for the bridge chip. Does not
+	match sub-devices.
+    * - ``V4L2_CHIP_MATCH_SUBDEV``
+      - 4
+      - Match the nth sub-device.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The ``match_type`` is invalid or no device could be matched.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-dbg-g-register.rst b/Documentation/userspace-api/media/v4l/vidioc-dbg-g-register.rst
new file mode 100644
index 000000000..e1a6abe70
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-dbg-g-register.rst
@@ -0,0 +1,160 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_DBG_G_REGISTER:
+
+**************************************************
+ioctl VIDIOC_DBG_G_REGISTER, VIDIOC_DBG_S_REGISTER
+**************************************************
+
+Name
+====
+
+VIDIOC_DBG_G_REGISTER - VIDIOC_DBG_S_REGISTER - Read or write hardware registers
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_DBG_G_REGISTER
+
+``int ioctl(int fd, VIDIOC_DBG_G_REGISTER, struct v4l2_dbg_register *argp)``
+
+.. c:macro:: VIDIOC_DBG_S_REGISTER
+
+``int ioctl(int fd, VIDIOC_DBG_S_REGISTER, const struct v4l2_dbg_register *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_dbg_register`.
+
+Description
+===========
+
+.. note::
+
+    This is an :ref:`experimental` interface and may
+    change in the future.
+
+For driver debugging purposes these ioctls allow test applications to
+access hardware registers directly. Regular applications must not use
+them.
+
+Since writing or even reading registers can jeopardize the system
+security, its stability and damage the hardware, both ioctls require
+superuser privileges. Additionally the Linux kernel must be compiled
+with the ``CONFIG_VIDEO_ADV_DEBUG`` option to enable these ioctls.
+
+To write a register applications must initialize all fields of a struct
+:c:type:`v4l2_dbg_register` except for ``size`` and
+call ``VIDIOC_DBG_S_REGISTER`` with a pointer to this structure. The
+``match.type`` and ``match.addr`` or ``match.name`` fields select a chip
+on the TV card, the ``reg`` field specifies a register number and the
+``val`` field the value to be written into the register.
+
+To read a register applications must initialize the ``match.type``,
+``match.addr`` or ``match.name`` and ``reg`` fields, and call
+``VIDIOC_DBG_G_REGISTER`` with a pointer to this structure. On success
+the driver stores the register value in the ``val`` field and the size
+(in bytes) of the value in ``size``.
+
+When ``match.type`` is ``V4L2_CHIP_MATCH_BRIDGE``, ``match.addr``
+selects the nth non-sub-device chip on the TV card. The number zero
+always selects the host chip, e. g. the chip connected to the PCI or USB
+bus. You can find out which chips are present with the
+:ref:`VIDIOC_DBG_G_CHIP_INFO` ioctl.
+
+When ``match.type`` is ``V4L2_CHIP_MATCH_SUBDEV``, ``match.addr``
+selects the nth sub-device.
+
+These ioctls are optional, not all drivers may support them. However
+when a driver supports these ioctls it must also support
+:ref:`VIDIOC_DBG_G_CHIP_INFO`. Conversely
+it may support ``VIDIOC_DBG_G_CHIP_INFO`` but not these ioctls.
+
+``VIDIOC_DBG_G_REGISTER`` and ``VIDIOC_DBG_S_REGISTER`` were introduced
+in Linux 2.6.21, but their API was changed to the one described here in
+kernel 2.6.29.
+
+We recommended the v4l2-dbg utility over calling these ioctls directly.
+It is available from the LinuxTV v4l-dvb repository; see
+`https://linuxtv.org/repo/ <https://linuxtv.org/repo/>`__ for access
+instructions.
+
+.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}|
+
+.. c:type:: v4l2_dbg_match
+
+.. flat-table:: struct v4l2_dbg_match
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - See :ref:`chip-match-types` for a list of possible types.
+    * - union {
+      - (anonymous)
+    * - __u32
+      - ``addr``
+      - Match a chip by this number, interpreted according to the ``type``
+	field.
+    * - char
+      - ``name[32]``
+      - Match a chip by this name, interpreted according to the ``type``
+	field. Currently unused.
+    * - }
+      -
+
+
+.. c:type:: v4l2_dbg_register
+
+.. flat-table:: struct v4l2_dbg_register
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - struct v4l2_dbg_match
+      - ``match``
+      - How to match the chip, see :c:type:`v4l2_dbg_match`.
+    * - __u32
+      - ``size``
+      - The register size in bytes.
+    * - __u64
+      - ``reg``
+      - A register number.
+    * - __u64
+      - ``val``
+      - The value read from, or to be written into the register.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _chip-match-types:
+
+.. flat-table:: Chip Match Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_CHIP_MATCH_BRIDGE``
+      - 0
+      - Match the nth chip on the card, zero for the bridge chip. Does not
+	match sub-devices.
+    * - ``V4L2_CHIP_MATCH_SUBDEV``
+      - 4
+      - Match the nth sub-device.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EPERM
+    Insufficient permissions. Root privileges are required to execute
+    these ioctls.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-decoder-cmd.rst b/Documentation/userspace-api/media/v4l/vidioc-decoder-cmd.rst
new file mode 100644
index 000000000..fd71ceece
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-decoder-cmd.rst
@@ -0,0 +1,216 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_DECODER_CMD:
+
+************************************************
+ioctl VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD
+************************************************
+
+Name
+====
+
+VIDIOC_DECODER_CMD - VIDIOC_TRY_DECODER_CMD - Execute an decoder command
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_DECODER_CMD
+
+``int ioctl(int fd, VIDIOC_DECODER_CMD, struct v4l2_decoder_cmd *argp)``
+
+.. c:macro:: VIDIOC_TRY_DECODER_CMD
+
+``int ioctl(int fd, VIDIOC_TRY_DECODER_CMD, struct v4l2_decoder_cmd *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    pointer to struct :c:type:`v4l2_decoder_cmd`.
+
+Description
+===========
+
+These ioctls control an audio/video (usually MPEG-) decoder.
+``VIDIOC_DECODER_CMD`` sends a command to the decoder,
+``VIDIOC_TRY_DECODER_CMD`` can be used to try a command without actually
+executing it. To send a command applications must initialize all fields
+of a struct :c:type:`v4l2_decoder_cmd` and call
+``VIDIOC_DECODER_CMD`` or ``VIDIOC_TRY_DECODER_CMD`` with a pointer to
+this structure.
+
+The ``cmd`` field must contain the command code. Some commands use the
+``flags`` field for additional information.
+
+A :c:func:`write()` or :ref:`VIDIOC_STREAMON`
+call sends an implicit START command to the decoder if it has not been
+started yet. Applies to both queues of mem2mem decoders.
+
+A :c:func:`close()` or :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`
+call of a streaming file descriptor sends an implicit immediate STOP
+command to the decoder, and all buffered data is discarded. Applies to both
+queues of mem2mem decoders.
+
+In principle, these ioctls are optional, not all drivers may support them. They were
+introduced in Linux 3.3. They are, however, mandatory for stateful mem2mem decoders
+(as further documented in :ref:`decoder`).
+
+.. tabularcolumns:: |p{1.1cm}|p{2.4cm}|p{1.2cm}|p{1.6cm}|p{10.6cm}|
+
+.. c:type:: v4l2_decoder_cmd
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_decoder_cmd
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 1 1 3
+
+    * - __u32
+      - ``cmd``
+      -
+      - The decoder command, see :ref:`decoder-cmds`.
+    * - __u32
+      - ``flags``
+      -
+      - Flags to go with the command. If no flags are defined for this
+	command, drivers and applications must set this field to zero.
+    * - union {
+      - (anonymous)
+    * - struct
+      - ``start``
+      -
+      - Structure containing additional data for the
+	``V4L2_DEC_CMD_START`` command.
+    * -
+      - __s32
+      - ``speed``
+      - Playback speed and direction. The playback speed is defined as
+	``speed``/1000 of the normal speed. So 1000 is normal playback.
+	Negative numbers denote reverse playback, so -1000 does reverse
+	playback at normal speed. Speeds -1, 0 and 1 have special
+	meanings: speed 0 is shorthand for 1000 (normal playback). A speed
+	of 1 steps just one frame forward, a speed of -1 steps just one
+	frame back.
+    * -
+      - __u32
+      - ``format``
+      - Format restrictions. This field is set by the driver, not the
+	application. Possible values are ``V4L2_DEC_START_FMT_NONE`` if
+	there are no format restrictions or ``V4L2_DEC_START_FMT_GOP`` if
+	the decoder operates on full GOPs (*Group Of Pictures*). This is
+	usually the case for reverse playback: the decoder needs full
+	GOPs, which it can then play in reverse order. So to implement
+	reverse playback the application must feed the decoder the last
+	GOP in the video file, then the GOP before that, etc. etc.
+    * - struct
+      - ``stop``
+      -
+      - Structure containing additional data for the ``V4L2_DEC_CMD_STOP``
+	command.
+    * -
+      - __u64
+      - ``pts``
+      - Stop playback at this ``pts`` or immediately if the playback is
+	already past that timestamp. Leave to 0 if you want to stop after
+	the last frame was decoded.
+    * - struct
+      - ``raw``
+    * -
+      - __u32
+      - ``data``\ [16]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+    * - }
+      -
+
+
+.. tabularcolumns:: |p{5.6cm}|p{0.6cm}|p{11.3cm}|
+
+.. _decoder-cmds:
+
+.. flat-table:: Decoder Commands
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 56 6 113
+
+    * - ``V4L2_DEC_CMD_START``
+      - 0
+      - Start the decoder. When the decoder is already running or paused,
+	this command will just change the playback speed. That means that
+	calling ``V4L2_DEC_CMD_START`` when the decoder was paused will
+	*not* resume the decoder. You have to explicitly call
+	``V4L2_DEC_CMD_RESUME`` for that. This command has one flag:
+	``V4L2_DEC_CMD_START_MUTE_AUDIO``. If set, then audio will be
+	muted when playing back at a non-standard speed.
+
+	For a device implementing the :ref:`decoder`, once the drain sequence
+	is initiated with the ``V4L2_DEC_CMD_STOP`` command, it must be driven
+	to completion before this command can be invoked.  Any attempt to
+	invoke the command while the drain sequence is in progress will trigger
+	an ``EBUSY`` error code.  The command may be also used to restart the
+	decoder in case of an implicit stop initiated by the decoder itself,
+	without the ``V4L2_DEC_CMD_STOP`` being called explicitly. See
+	:ref:`decoder` for more details.
+    * - ``V4L2_DEC_CMD_STOP``
+      - 1
+      - Stop the decoder. When the decoder is already stopped, this
+	command does nothing. This command has two flags: if
+	``V4L2_DEC_CMD_STOP_TO_BLACK`` is set, then the decoder will set
+	the picture to black after it stopped decoding. Otherwise the last
+	image will repeat. If
+	``V4L2_DEC_CMD_STOP_IMMEDIATELY`` is set, then the decoder stops
+	immediately (ignoring the ``pts`` value), otherwise it will keep
+	decoding until timestamp >= pts or until the last of the pending
+	data from its internal buffers was decoded.
+
+	For a device implementing the :ref:`decoder`, the command will initiate
+	the drain sequence as documented in :ref:`decoder`.  No flags or other
+	arguments are accepted in this case. Any attempt to invoke the command
+	again before the sequence completes will trigger an ``EBUSY`` error
+	code.
+    * - ``V4L2_DEC_CMD_PAUSE``
+      - 2
+      - Pause the decoder. When the decoder has not been started yet, the
+	driver will return an ``EPERM`` error code. When the decoder is
+	already paused, this command does nothing. This command has one
+	flag: if ``V4L2_DEC_CMD_PAUSE_TO_BLACK`` is set, then set the
+	decoder output to black when paused.
+    * - ``V4L2_DEC_CMD_RESUME``
+      - 3
+      - Resume decoding after a PAUSE command. When the decoder has not
+	been started yet, the driver will return an ``EPERM`` error code. When
+	the decoder is already running, this command does nothing. No
+	flags are defined for this command.
+    * - ``V4L2_DEC_CMD_FLUSH``
+      - 4
+      - Flush any held capture buffers. Only valid for stateless decoders.
+	This command is typically used when the application reached the
+	end of the stream and the last output buffer had the
+	``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag set. This would prevent
+	dequeueing the capture buffer containing the last decoded frame.
+	So this command can be used to explicitly flush that final decoded
+	frame. This command does nothing if there are no held capture buffers.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EBUSY
+    A drain sequence of a device implementing the :ref:`decoder` is still in
+    progress. It is not allowed to issue another decoder command until it
+    completes.
+
+EINVAL
+    The ``cmd`` field is invalid.
+
+EPERM
+    The application sent a PAUSE or RESUME command when the decoder was
+    not running.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst b/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
new file mode 100644
index 000000000..634af717c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
@@ -0,0 +1,373 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_DQEVENT:
+
+********************
+ioctl VIDIOC_DQEVENT
+********************
+
+Name
+====
+
+VIDIOC_DQEVENT - Dequeue event
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_DQEVENT
+
+``int ioctl(int fd, VIDIOC_DQEVENT, struct v4l2_event *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_event`.
+
+Description
+===========
+
+Dequeue an event from a video device. No input is required for this
+ioctl. All the fields of the struct :c:type:`v4l2_event`
+structure are filled by the driver. The file handle will also receive
+exceptions which the application may get by e.g. using the select system
+call.
+
+.. tabularcolumns:: |p{3.0cm}|p{4.4cm}|p{2.4cm}|p{7.7cm}|
+
+.. c:type:: v4l2_event
+
+.. cssclass: longtable
+
+.. flat-table:: struct v4l2_event
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of the event, see :ref:`event-type`.
+    * - union {
+      - ``u``
+    * - struct :c:type:`v4l2_event_vsync`
+      - ``vsync``
+      - Event data for event ``V4L2_EVENT_VSYNC``.
+    * - struct :c:type:`v4l2_event_ctrl`
+      - ``ctrl``
+      - Event data for event ``V4L2_EVENT_CTRL``.
+    * - struct :c:type:`v4l2_event_frame_sync`
+      - ``frame_sync``
+      - Event data for event ``V4L2_EVENT_FRAME_SYNC``.
+    * - struct :c:type:`v4l2_event_motion_det`
+      - ``motion_det``
+      - Event data for event V4L2_EVENT_MOTION_DET.
+    * - struct :c:type:`v4l2_event_src_change`
+      - ``src_change``
+      - Event data for event V4L2_EVENT_SOURCE_CHANGE.
+    * - __u8
+      - ``data``\ [64]
+      - Event data. Defined by the event type. The union should be used to
+	define easily accessible type for events.
+    * - }
+      -
+    * - __u32
+      - ``pending``
+      - Number of pending events excluding this one.
+    * - __u32
+      - ``sequence``
+      - Event sequence number. The sequence number is incremented for
+	every subscribed event that takes place. If sequence numbers are
+	not contiguous it means that events have been lost.
+    * - struct timespec
+      - ``timestamp``
+      - Event timestamp. The timestamp has been taken from the
+	``CLOCK_MONOTONIC`` clock. To access the same clock outside V4L2,
+	use :c:func:`clock_gettime`.
+    * - u32
+      - ``id``
+      - The ID associated with the event source. If the event does not
+	have an associated ID (this depends on the event type), then this
+	is 0.
+    * - __u32
+      - ``reserved``\ [8]
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. cssclass:: longtable
+
+.. _event-type:
+
+.. flat-table:: Event Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_EVENT_ALL``
+      - 0
+      - All events. V4L2_EVENT_ALL is valid only for
+	VIDIOC_UNSUBSCRIBE_EVENT for unsubscribing all events at once.
+    * - ``V4L2_EVENT_VSYNC``
+      - 1
+      - This event is triggered on the vertical sync. This event has a
+	struct :c:type:`v4l2_event_vsync` associated
+	with it.
+    * - ``V4L2_EVENT_EOS``
+      - 2
+      - This event is triggered when the end of a stream is reached. This
+	is typically used with MPEG decoders to report to the application
+	when the last of the MPEG stream has been decoded.
+    * - ``V4L2_EVENT_CTRL``
+      - 3
+      - This event requires that the ``id`` matches the control ID from
+	which you want to receive events. This event is triggered if the
+	control's value changes, if a button control is pressed or if the
+	control's flags change. This event has a struct
+	:c:type:`v4l2_event_ctrl` associated with it.
+	This struct contains much of the same information as struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>` and struct
+	:c:type:`v4l2_control`.
+
+	If the event is generated due to a call to
+	:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` or
+	:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, then the
+	event will *not* be sent to the file handle that called the ioctl
+	function. This prevents nasty feedback loops. If you *do* want to
+	get the event, then set the ``V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK``
+	flag.
+
+	This event type will ensure that no information is lost when more
+	events are raised than there is room internally. In that case the
+	struct :c:type:`v4l2_event_ctrl` of the
+	second-oldest event is kept, but the ``changes`` field of the
+	second-oldest event is ORed with the ``changes`` field of the
+	oldest event.
+    * - ``V4L2_EVENT_FRAME_SYNC``
+      - 4
+      - Triggered immediately when the reception of a frame has begun.
+	This event has a struct
+	:c:type:`v4l2_event_frame_sync`
+	associated with it.
+
+	If the hardware needs to be stopped in the case of a buffer
+	underrun it might not be able to generate this event. In such
+	cases the ``frame_sequence`` field in struct
+	:c:type:`v4l2_event_frame_sync` will not
+	be incremented. This causes two consecutive frame sequence numbers
+	to have n times frame interval in between them.
+    * - ``V4L2_EVENT_SOURCE_CHANGE``
+      - 5
+      - This event is triggered when a source parameter change is detected
+	during runtime by the video device. It can be a runtime resolution
+	change triggered by a video decoder or the format change happening
+	on an input connector. This event requires that the ``id`` matches
+	the input index (when used with a video device node) or the pad
+	index (when used with a subdevice node) from which you want to
+	receive events.
+
+	This event has a struct
+	:c:type:`v4l2_event_src_change`
+	associated with it. The ``changes`` bitfield denotes what has
+	changed for the subscribed pad. If multiple events occurred before
+	application could dequeue them, then the changes will have the
+	ORed value of all the events generated.
+    * - ``V4L2_EVENT_MOTION_DET``
+      - 6
+      - Triggered whenever the motion detection state for one or more of
+	the regions changes. This event has a struct
+	:c:type:`v4l2_event_motion_det`
+	associated with it.
+    * - ``V4L2_EVENT_PRIVATE_START``
+      - 0x08000000
+      - Base event number for driver-private events.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_event_vsync
+
+.. flat-table:: struct v4l2_event_vsync
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``field``
+      - The upcoming field. See enum :c:type:`v4l2_field`.
+
+
+.. tabularcolumns:: |p{3.5cm}|p{3.0cm}|p{1.8cm}|p{8.5cm}|
+
+.. c:type:: v4l2_event_ctrl
+
+.. flat-table:: struct v4l2_event_ctrl
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``changes``
+      - A bitmask that tells what has changed. See
+	:ref:`ctrl-changes-flags`.
+    * - __u32
+      - ``type``
+      - The type of the control. See enum
+	:c:type:`v4l2_ctrl_type`.
+    * - union {
+      - (anonymous)
+    * - __s32
+      - ``value``
+      - The 32-bit value of the control for 32-bit control types. This is
+	0 for string controls since the value of a string cannot be passed
+	using :ref:`VIDIOC_DQEVENT`.
+    * - __s64
+      - ``value64``
+      - The 64-bit value of the control for 64-bit control types.
+    * - }
+      -
+    * - __u32
+      - ``flags``
+      - The control flags. See :ref:`control-flags`.
+    * - __s32
+      - ``minimum``
+      - The minimum value of the control. See struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>`.
+    * - __s32
+      - ``maximum``
+      - The maximum value of the control. See struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>`.
+    * - __s32
+      - ``step``
+      - The step value of the control. See struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>`.
+    * - __s32
+      - ``default_value``
+      - The default value of the control. See struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>`.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_event_frame_sync
+
+.. flat-table:: struct v4l2_event_frame_sync
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``frame_sequence``
+      - The sequence number of the frame being received.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_event_src_change
+
+.. flat-table:: struct v4l2_event_src_change
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``changes``
+      - A bitmask that tells what has changed. See
+	:ref:`src-changes-flags`.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_event_motion_det
+
+.. flat-table:: struct v4l2_event_motion_det
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``flags``
+      - Currently only one flag is available: if
+	``V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ`` is set, then the
+	``frame_sequence`` field is valid, otherwise that field should be
+	ignored.
+    * - __u32
+      - ``frame_sequence``
+      - The sequence number of the frame being received. Only valid if the
+	``V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ`` flag was set.
+    * - __u32
+      - ``region_mask``
+      - The bitmask of the regions that reported motion. There is at least
+	one region. If this field is 0, then no motion was detected at
+	all. If there is no ``V4L2_CID_DETECT_MD_REGION_GRID`` control
+	(see :ref:`detect-controls`) to assign a different region to
+	each cell in the motion detection grid, then that all cells are
+	automatically assigned to the default region 0.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _ctrl-changes-flags:
+
+.. flat-table:: Control Changes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_EVENT_CTRL_CH_VALUE``
+      - 0x0001
+      - This control event was triggered because the value of the control
+	changed. Special cases: Volatile controls do no generate this
+	event; If a control has the ``V4L2_CTRL_FLAG_EXECUTE_ON_WRITE``
+	flag set, then this event is sent as well, regardless its value.
+    * - ``V4L2_EVENT_CTRL_CH_FLAGS``
+      - 0x0002
+      - This control event was triggered because the control flags
+	changed.
+    * - ``V4L2_EVENT_CTRL_CH_RANGE``
+      - 0x0004
+      - This control event was triggered because the minimum, maximum,
+	step or the default value of the control changed.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _src-changes-flags:
+
+.. flat-table:: Source Changes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_EVENT_SRC_CH_RESOLUTION``
+      - 0x0001
+      - This event gets triggered when a resolution change is detected at
+	an input. This can come from an input connector or from a video
+	decoder. Applications will have to query the new resolution (if
+	any, the signal may also have been lost).
+
+	For stateful decoders follow the guidelines in :ref:`decoder`.
+	Video Capture devices have to query the new timings using
+	:ref:`VIDIOC_QUERY_DV_TIMINGS` or
+	:ref:`VIDIOC_QUERYSTD <VIDIOC_QUERYSTD>`.
+
+	*Important*: even if the new video timings appear identical to the old
+	ones, receiving this event indicates that there was an issue with the
+	video signal and you must stop and restart streaming
+	(:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`
+	followed by :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`). The reason is
+	that many Video Capture devices are not able to recover from a temporary
+	loss of signal and so restarting streaming I/O is required in order for
+	the hardware to synchronize to the video signal.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-dv-timings-cap.rst b/Documentation/userspace-api/media/v4l/vidioc-dv-timings-cap.rst
new file mode 100644
index 000000000..27bd6a83e
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-dv-timings-cap.rst
@@ -0,0 +1,159 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_DV_TIMINGS_CAP:
+
+*********************************************************
+ioctl VIDIOC_DV_TIMINGS_CAP, VIDIOC_SUBDEV_DV_TIMINGS_CAP
+*********************************************************
+
+Name
+====
+
+VIDIOC_DV_TIMINGS_CAP - VIDIOC_SUBDEV_DV_TIMINGS_CAP - The capabilities of the Digital Video receiver/transmitter
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_DV_TIMINGS_CAP
+
+``int ioctl(int fd, VIDIOC_DV_TIMINGS_CAP, struct v4l2_dv_timings_cap *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_DV_TIMINGS_CAP
+
+``int ioctl(int fd, VIDIOC_SUBDEV_DV_TIMINGS_CAP, struct v4l2_dv_timings_cap *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_dv_timings_cap`.
+
+Description
+===========
+
+To query the capabilities of the DV receiver/transmitter applications
+initialize the ``pad`` field to 0, zero the reserved array of struct
+:c:type:`v4l2_dv_timings_cap` and call the
+``VIDIOC_DV_TIMINGS_CAP`` ioctl on a video node and the driver will fill
+in the structure.
+
+.. note::
+
+   Drivers may return different values after
+   switching the video input or output.
+
+When implemented by the driver DV capabilities of subdevices can be
+queried by calling the ``VIDIOC_SUBDEV_DV_TIMINGS_CAP`` ioctl directly
+on a subdevice node. The capabilities are specific to inputs (for DV
+receivers) or outputs (for DV transmitters), applications must specify
+the desired pad number in the struct
+:c:type:`v4l2_dv_timings_cap` ``pad`` field and
+zero the ``reserved`` array. Attempts to query capabilities on a pad
+that doesn't support them will return an ``EINVAL`` error code.
+
+.. tabularcolumns:: |p{1.2cm}|p{3.0cm}|p{13.3cm}|
+
+.. c:type:: v4l2_bt_timings_cap
+
+.. flat-table:: struct v4l2_bt_timings_cap
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``min_width``
+      - Minimum width of the active video in pixels.
+    * - __u32
+      - ``max_width``
+      - Maximum width of the active video in pixels.
+    * - __u32
+      - ``min_height``
+      - Minimum height of the active video in lines.
+    * - __u32
+      - ``max_height``
+      - Maximum height of the active video in lines.
+    * - __u64
+      - ``min_pixelclock``
+      - Minimum pixelclock frequency in Hz.
+    * - __u64
+      - ``max_pixelclock``
+      - Maximum pixelclock frequency in Hz.
+    * - __u32
+      - ``standards``
+      - The video standard(s) supported by the hardware. See
+	:ref:`dv-bt-standards` for a list of standards.
+    * - __u32
+      - ``capabilities``
+      - Several flags giving more information about the capabilities. See
+	:ref:`dv-bt-cap-capabilities` for a description of the flags.
+    * - __u32
+      - ``reserved``\ [16]
+      - Reserved for future extensions.
+	Drivers must set the array to zero.
+
+
+.. tabularcolumns:: |p{1.0cm}|p{4.0cm}|p{3.5cm}|p{9.2cm}|
+
+.. c:type:: v4l2_dv_timings_cap
+
+.. flat-table:: struct v4l2_dv_timings_cap
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of DV timings as listed in :ref:`dv-timing-types`.
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media controller API. This field is
+	only used when operating on a subdevice node. When operating on a
+	video node applications must set this field to zero.
+    * - __u32
+      - ``reserved``\ [2]
+      - Reserved for future extensions.
+
+	Drivers and applications must set the array to zero.
+    * - union {
+      - (anonymous)
+    * - struct :c:type:`v4l2_bt_timings_cap`
+      - ``bt``
+      - BT.656/1120 timings capabilities of the hardware.
+    * - __u32
+      - ``raw_data``\ [32]
+    * - }
+      -
+
+.. tabularcolumns:: |p{7.0cm}|p{10.5cm}|
+
+.. _dv-bt-cap-capabilities:
+
+.. flat-table:: DV BT Timing capabilities
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Flag
+      - Description
+    * -
+      -
+    * - ``V4L2_DV_BT_CAP_INTERLACED``
+      - Interlaced formats are supported.
+    * - ``V4L2_DV_BT_CAP_PROGRESSIVE``
+      - Progressive formats are supported.
+    * - ``V4L2_DV_BT_CAP_REDUCED_BLANKING``
+      - CVT/GTF specific: the timings can make use of reduced blanking
+	(CVT) or the 'Secondary GTF' curve (GTF).
+    * - ``V4L2_DV_BT_CAP_CUSTOM``
+      - Can support non-standard timings, i.e. timings not belonging to
+	the standards set in the ``standards`` field.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-encoder-cmd.rst b/Documentation/userspace-api/media/v4l/vidioc-encoder-cmd.rst
new file mode 100644
index 000000000..567360671
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-encoder-cmd.rst
@@ -0,0 +1,169 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENCODER_CMD:
+
+************************************************
+ioctl VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD
+************************************************
+
+Name
+====
+
+VIDIOC_ENCODER_CMD - VIDIOC_TRY_ENCODER_CMD - Execute an encoder command
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENCODER_CMD
+
+``int ioctl(int fd, VIDIOC_ENCODER_CMD, struct v4l2_encoder_cmd *argp)``
+
+.. c:macro:: VIDIOC_TRY_ENCODER_CMD
+
+``int ioctl(int fd, VIDIOC_TRY_ENCODER_CMD, struct v4l2_encoder_cmd *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_encoder_cmd`.
+
+Description
+===========
+
+These ioctls control an audio/video (usually MPEG-) encoder.
+``VIDIOC_ENCODER_CMD`` sends a command to the encoder,
+``VIDIOC_TRY_ENCODER_CMD`` can be used to try a command without actually
+executing it.
+
+To send a command applications must initialize all fields of a struct
+:c:type:`v4l2_encoder_cmd` and call
+``VIDIOC_ENCODER_CMD`` or ``VIDIOC_TRY_ENCODER_CMD`` with a pointer to
+this structure.
+
+The ``cmd`` field must contain the command code. Some commands use the
+``flags`` field for additional information.
+
+After a STOP command, :c:func:`read()` calls will read
+the remaining data buffered by the driver. When the buffer is empty,
+:c:func:`read()` will return zero and the next :c:func:`read()`
+call will restart the encoder.
+
+A :c:func:`read()` or :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`
+call sends an implicit START command to the encoder if it has not been
+started yet. Applies to both queues of mem2mem encoders.
+
+A :c:func:`close()` or :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`
+call of a streaming file descriptor sends an implicit immediate STOP to
+the encoder, and all buffered data is discarded. Applies to both queues of
+mem2mem encoders.
+
+These ioctls are optional, not all drivers may support them. They were
+introduced in Linux 2.6.21. They are, however, mandatory for stateful mem2mem
+encoders (as further documented in :ref:`encoder`).
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_encoder_cmd
+
+.. flat-table:: struct v4l2_encoder_cmd
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``cmd``
+      - The encoder command, see :ref:`encoder-cmds`.
+    * - __u32
+      - ``flags``
+      - Flags to go with the command, see :ref:`encoder-flags`. If no
+	flags are defined for this command, drivers and applications must
+	set this field to zero.
+    * - __u32
+      - ``data``\ [8]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _encoder-cmds:
+
+.. flat-table:: Encoder Commands
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_ENC_CMD_START``
+      - 0
+      - Start the encoder. When the encoder is already running or paused,
+	this command does nothing. No flags are defined for this command.
+
+	For a device implementing the :ref:`encoder`, once the drain sequence
+	is initiated with the ``V4L2_ENC_CMD_STOP`` command, it must be driven
+	to completion before this command can be invoked.  Any attempt to
+	invoke the command while the drain sequence is in progress will trigger
+	an ``EBUSY`` error code. See :ref:`encoder` for more details.
+    * - ``V4L2_ENC_CMD_STOP``
+      - 1
+      - Stop the encoder. When the ``V4L2_ENC_CMD_STOP_AT_GOP_END`` flag
+	is set, encoding will continue until the end of the current *Group
+	Of Pictures*, otherwise encoding will stop immediately. When the
+	encoder is already stopped, this command does nothing.
+
+	For a device implementing the :ref:`encoder`, the command will initiate
+	the drain sequence as documented in :ref:`encoder`. No flags or other
+	arguments are accepted in this case. Any attempt to invoke the command
+	again before the sequence completes will trigger an ``EBUSY`` error
+	code.
+    * - ``V4L2_ENC_CMD_PAUSE``
+      - 2
+      - Pause the encoder. When the encoder has not been started yet, the
+	driver will return an ``EPERM`` error code. When the encoder is
+	already paused, this command does nothing. No flags are defined
+	for this command.
+    * - ``V4L2_ENC_CMD_RESUME``
+      - 3
+      - Resume encoding after a PAUSE command. When the encoder has not
+	been started yet, the driver will return an ``EPERM`` error code. When
+	the encoder is already running, this command does nothing. No
+	flags are defined for this command.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _encoder-flags:
+
+.. flat-table:: Encoder Command Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_ENC_CMD_STOP_AT_GOP_END``
+      - 0x0001
+      - Stop encoding at the end of the current *Group Of Pictures*,
+	rather than immediately.
+
+        Does not apply to :ref:`encoder`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EBUSY
+    A drain sequence of a device implementing the :ref:`encoder` is still in
+    progress. It is not allowed to issue another encoder command until it
+    completes.
+
+EINVAL
+    The ``cmd`` field is invalid.
+
+EPERM
+    The application sent a PAUSE or RESUME command when the encoder was
+    not running.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enum-dv-timings.rst b/Documentation/userspace-api/media/v4l/vidioc-enum-dv-timings.rst
new file mode 100644
index 000000000..20730cd4f
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enum-dv-timings.rst
@@ -0,0 +1,105 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUM_DV_TIMINGS:
+
+***********************************************************
+ioctl VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS
+***********************************************************
+
+Name
+====
+
+VIDIOC_ENUM_DV_TIMINGS - VIDIOC_SUBDEV_ENUM_DV_TIMINGS - Enumerate supported Digital Video timings
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUM_DV_TIMINGS
+
+``int ioctl(int fd, VIDIOC_ENUM_DV_TIMINGS, struct v4l2_enum_dv_timings *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_ENUM_DV_TIMINGS
+
+``int ioctl(int fd, VIDIOC_SUBDEV_ENUM_DV_TIMINGS, struct v4l2_enum_dv_timings *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_enum_dv_timings`.
+
+Description
+===========
+
+While some DV receivers or transmitters support a wide range of timings,
+others support only a limited number of timings. With this ioctl
+applications can enumerate a list of known supported timings. Call
+:ref:`VIDIOC_DV_TIMINGS_CAP` to check if it
+also supports other standards or even custom timings that are not in
+this list.
+
+To query the available timings, applications initialize the ``index``
+field, set the ``pad`` field to 0, zero the reserved array of struct
+:c:type:`v4l2_enum_dv_timings` and call the
+``VIDIOC_ENUM_DV_TIMINGS`` ioctl on a video node with a pointer to this
+structure. Drivers fill the rest of the structure or return an ``EINVAL``
+error code when the index is out of bounds. To enumerate all supported
+DV timings, applications shall begin at index zero, incrementing by one
+until the driver returns ``EINVAL``.
+
+.. note::
+
+   Drivers may enumerate a different set of DV timings after
+   switching the video input or output.
+
+When implemented by the driver DV timings of subdevices can be queried
+by calling the ``VIDIOC_SUBDEV_ENUM_DV_TIMINGS`` ioctl directly on a
+subdevice node. The DV timings are specific to inputs (for DV receivers)
+or outputs (for DV transmitters), applications must specify the desired
+pad number in the struct
+:c:type:`v4l2_enum_dv_timings` ``pad`` field.
+Attempts to enumerate timings on a pad that doesn't support them will
+return an ``EINVAL`` error code.
+
+.. c:type:: v4l2_enum_dv_timings
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_enum_dv_timings
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Number of the DV timings, set by the application.
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media controller API. This field is
+	only used when operating on a subdevice node. When operating on a
+	video node applications must set this field to zero.
+    * - __u32
+      - ``reserved``\ [2]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+    * - struct :c:type:`v4l2_dv_timings`
+      - ``timings``
+      - The timings.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_enum_dv_timings`
+    ``index`` is out of bounds or the ``pad`` number is invalid.
+
+ENODATA
+    Digital video presets are not supported for this input or output.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst b/Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst
new file mode 100644
index 000000000..2b3fa9c23
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst
@@ -0,0 +1,239 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUM_FMT:
+
+*********************
+ioctl VIDIOC_ENUM_FMT
+*********************
+
+Name
+====
+
+VIDIOC_ENUM_FMT - Enumerate image formats
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUM_FMT
+
+``int ioctl(int fd, VIDIOC_ENUM_FMT, struct v4l2_fmtdesc *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_fmtdesc`.
+
+Description
+===========
+
+To enumerate image formats applications initialize the ``type``, ``mbus_code``
+and ``index`` fields of struct :c:type:`v4l2_fmtdesc` and call
+the :ref:`VIDIOC_ENUM_FMT` ioctl with a pointer to this structure. Drivers
+fill the rest of the structure or return an ``EINVAL`` error code. All
+formats are enumerable by beginning at index zero and incrementing by
+one until ``EINVAL`` is returned. If applicable, drivers shall return
+formats in preference order, where preferred formats are returned before
+(that is, with lower ``index`` value) less-preferred formats.
+
+Depending on the ``V4L2_CAP_IO_MC`` :ref:`capability <device-capabilities>`,
+the ``mbus_code`` field is handled differently:
+
+1) ``V4L2_CAP_IO_MC`` is not set (also known as a 'video-node-centric' driver)
+
+   Applications shall initialize the ``mbus_code`` field to zero and drivers
+   shall ignore the value of the field.
+
+   Drivers shall enumerate all image formats.
+
+   .. note::
+
+      After switching the input or output the list of enumerated image
+      formats may be different.
+
+2) ``V4L2_CAP_IO_MC`` is set (also known as an 'MC-centric' driver)
+
+   If the ``mbus_code`` field is zero, then all image formats
+   shall be enumerated.
+
+   If the ``mbus_code`` field is initialized to a valid (non-zero)
+   :ref:`media bus format code <v4l2-mbus-pixelcode>`, then drivers
+   shall restrict enumeration to only the image formats that can produce
+   (for video output devices) or be produced from (for video capture
+   devices) that media bus code. If the ``mbus_code`` is unsupported by
+   the driver, then ``EINVAL`` shall be returned.
+
+   Regardless of the value of the ``mbus_code`` field, the enumerated image
+   formats shall not depend on the active configuration of the video device
+   or device pipeline.
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_fmtdesc
+
+.. flat-table:: struct v4l2_fmtdesc
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Number of the format in the enumeration, set by the application.
+	This is in no way related to the ``pixelformat`` field.
+    * - __u32
+      - ``type``
+      - Type of the data stream, set by the application. Only these types
+	are valid here: ``V4L2_BUF_TYPE_VIDEO_CAPTURE``,
+	``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``,
+	``V4L2_BUF_TYPE_VIDEO_OUTPUT``,
+	``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``,
+	``V4L2_BUF_TYPE_VIDEO_OVERLAY``,
+	``V4L2_BUF_TYPE_SDR_CAPTURE``,
+	``V4L2_BUF_TYPE_SDR_OUTPUT``,
+	``V4L2_BUF_TYPE_META_CAPTURE`` and
+	``V4L2_BUF_TYPE_META_OUTPUT``.
+	See :c:type:`v4l2_buf_type`.
+    * - __u32
+      - ``flags``
+      - See :ref:`fmtdesc-flags`
+    * - __u8
+      - ``description``\ [32]
+      - Description of the format, a NUL-terminated ASCII string. This
+	information is intended for the user, for example: "YUV 4:2:2".
+    * - __u32
+      - ``pixelformat``
+      - The image format identifier. This is a four character code as
+	computed by the v4l2_fourcc() macro:
+    * - :cspan:`2`
+
+	.. _v4l2-fourcc:
+
+	``#define v4l2_fourcc(a,b,c,d)``
+
+	``(((__u32)(a)<<0)|((__u32)(b)<<8)|((__u32)(c)<<16)|((__u32)(d)<<24))``
+
+	Several image formats are already defined by this specification in
+	:ref:`pixfmt`.
+
+	.. attention::
+
+	   These codes are not the same as those used
+	   in the Windows world.
+    * - __u32
+      - ``mbus_code``
+      - Media bus code restricting the enumerated formats, set by the
+        application. Only applicable to drivers that advertise the
+        ``V4L2_CAP_IO_MC`` :ref:`capability <device-capabilities>`, shall be 0
+        otherwise.
+    * - __u32
+      - ``reserved``\ [3]
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _fmtdesc-flags:
+
+.. flat-table:: Image Format Description Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_FMT_FLAG_COMPRESSED``
+      - 0x0001
+      - This is a compressed format.
+    * - ``V4L2_FMT_FLAG_EMULATED``
+      - 0x0002
+      - This format is not native to the device but emulated through
+	software (usually libv4l2), where possible try to use a native
+	format instead for better performance.
+    * - ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM``
+      - 0x0004
+      - The hardware decoder for this compressed bytestream format (aka coded
+	format) is capable of parsing a continuous bytestream. Applications do
+	not need to parse the bytestream themselves to find the boundaries
+	between frames/fields.
+
+	This flag can only be used in combination with the
+	``V4L2_FMT_FLAG_COMPRESSED`` flag, since this applies to compressed
+	formats only. This flag is valid for stateful decoders only.
+    * - ``V4L2_FMT_FLAG_DYN_RESOLUTION``
+      - 0x0008
+      - Dynamic resolution switching is supported by the device for this
+	compressed bytestream format (aka coded format). It will notify the user
+	via the event ``V4L2_EVENT_SOURCE_CHANGE`` when changes in the video
+	parameters are detected.
+
+	This flag can only be used in combination with the
+	``V4L2_FMT_FLAG_COMPRESSED`` flag, since this applies to
+	compressed formats only. This flag is valid for stateful codecs only.
+    * - ``V4L2_FMT_FLAG_ENC_CAP_FRAME_INTERVAL``
+      - 0x0010
+      - The hardware encoder supports setting the ``CAPTURE`` coded frame
+	interval separately from the ``OUTPUT`` raw frame interval.
+	Setting the ``OUTPUT`` raw frame interval with :ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>`
+	also sets the ``CAPTURE`` coded frame interval to the same value.
+	If this flag is set, then the ``CAPTURE`` coded frame interval can be
+	set to a different value afterwards. This is typically used for
+	offline encoding where the ``OUTPUT`` raw frame interval is used as
+	a hint for reserving hardware encoder resources and the ``CAPTURE`` coded
+	frame interval is the actual frame rate embedded in the encoded video
+	stream.
+
+	This flag can only be used in combination with the
+	``V4L2_FMT_FLAG_COMPRESSED`` flag, since this applies to
+        compressed formats only. This flag is valid for stateful encoders only.
+    * - ``V4L2_FMT_FLAG_CSC_COLORSPACE``
+      - 0x0020
+      - The driver allows the application to try to change the default
+	colorspace. This flag is relevant only for capture devices.
+	The application can ask to configure the colorspace of the capture device
+	when calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with
+	:ref:`V4L2_PIX_FMT_FLAG_SET_CSC <v4l2-pix-fmt-flag-set-csc>` set.
+    * - ``V4L2_FMT_FLAG_CSC_XFER_FUNC``
+      - 0x0040
+      - The driver allows the application to try to change the default
+	transfer function. This flag is relevant only for capture devices.
+	The application can ask to configure the transfer function of the capture
+	device when calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with
+	:ref:`V4L2_PIX_FMT_FLAG_SET_CSC <v4l2-pix-fmt-flag-set-csc>` set.
+    * - ``V4L2_FMT_FLAG_CSC_YCBCR_ENC``
+      - 0x0080
+      - The driver allows the application to try to change the default
+	Y'CbCr encoding. This flag is relevant only for capture devices.
+	The application can ask to configure the Y'CbCr encoding of the capture device
+	when calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with
+	:ref:`V4L2_PIX_FMT_FLAG_SET_CSC <v4l2-pix-fmt-flag-set-csc>` set.
+    * - ``V4L2_FMT_FLAG_CSC_HSV_ENC``
+      - 0x0080
+      - The driver allows the application to try to change the default
+	HSV encoding. This flag is relevant only for capture devices.
+	The application can ask to configure the HSV encoding of the capture device
+	when calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with
+	:ref:`V4L2_PIX_FMT_FLAG_SET_CSC <v4l2-pix-fmt-flag-set-csc>` set.
+    * - ``V4L2_FMT_FLAG_CSC_QUANTIZATION``
+      - 0x0100
+      - The driver allows the application to try to change the default
+	quantization. This flag is relevant only for capture devices.
+	The application can ask to configure the quantization of the capture
+	device when calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with
+	:ref:`V4L2_PIX_FMT_FLAG_SET_CSC <v4l2-pix-fmt-flag-set-csc>` set.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_fmtdesc` ``type`` is not
+    supported or the ``index`` is out of bounds.
+
+    If ``V4L2_CAP_IO_MC`` is set and the specified ``mbus_code``
+    is unsupported, then also return this error code.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enum-frameintervals.rst b/Documentation/userspace-api/media/v4l/vidioc-enum-frameintervals.rst
new file mode 100644
index 000000000..1f0949726
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enum-frameintervals.rst
@@ -0,0 +1,189 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUM_FRAMEINTERVALS:
+
+********************************
+ioctl VIDIOC_ENUM_FRAMEINTERVALS
+********************************
+
+Name
+====
+
+VIDIOC_ENUM_FRAMEINTERVALS - Enumerate frame intervals
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUM_FRAMEINTERVALS
+
+``int ioctl(int fd, VIDIOC_ENUM_FRAMEINTERVALS, struct v4l2_frmivalenum *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_frmivalenum`
+    that contains a pixel format and size and receives a frame interval.
+
+Description
+===========
+
+This ioctl allows applications to enumerate all frame intervals that the
+device supports for the given pixel format and frame size.
+
+The supported pixel formats and frame sizes can be obtained by using the
+:ref:`VIDIOC_ENUM_FMT` and
+:ref:`VIDIOC_ENUM_FRAMESIZES` functions.
+
+The return value and the content of the ``v4l2_frmivalenum.type`` field
+depend on the type of frame intervals the device supports. Here are the
+semantics of the function for the different cases:
+
+-  **Discrete:** The function returns success if the given index value
+   (zero-based) is valid. The application should increase the index by
+   one for each call until ``EINVAL`` is returned. The
+   `v4l2_frmivalenum.type` field is set to
+   `V4L2_FRMIVAL_TYPE_DISCRETE` by the driver. Of the union only
+   the `discrete` member is valid.
+
+-  **Step-wise:** The function returns success if the given index value
+   is zero and ``EINVAL`` for any other index value. The
+   ``v4l2_frmivalenum.type`` field is set to
+   ``V4L2_FRMIVAL_TYPE_STEPWISE`` by the driver. Of the union only the
+   ``stepwise`` member is valid.
+
+-  **Continuous:** This is a special case of the step-wise type above.
+   The function returns success if the given index value is zero and
+   ``EINVAL`` for any other index value. The ``v4l2_frmivalenum.type``
+   field is set to ``V4L2_FRMIVAL_TYPE_CONTINUOUS`` by the driver. Of
+   the union only the ``stepwise`` member is valid and the ``step``
+   value is set to 1.
+
+When the application calls the function with index zero, it must check
+the ``type`` field to determine the type of frame interval enumeration
+the device supports. Only for the ``V4L2_FRMIVAL_TYPE_DISCRETE`` type
+does it make sense to increase the index value to receive more frame
+intervals.
+
+.. note::
+
+   The order in which the frame intervals are returned has no
+   special meaning. In particular does it not say anything about potential
+   default frame intervals.
+
+Applications can assume that the enumeration data does not change
+without any interaction from the application itself. This means that the
+enumeration data is consistent if the application does not perform any
+other ioctl calls while it runs the frame interval enumeration.
+
+.. note::
+
+   **Frame intervals and frame rates:** The V4L2 API uses frame
+   intervals instead of frame rates. Given the frame interval the frame
+   rate can be computed as follows:
+
+   ::
+
+       frame_rate = 1 / frame_interval
+
+Structs
+=======
+
+In the structs below, *IN* denotes a value that has to be filled in by
+the application, *OUT* denotes values that the driver fills in. The
+application should zero out all members except for the *IN* fields.
+
+.. c:type:: v4l2_frmival_stepwise
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_frmival_stepwise
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - struct :c:type:`v4l2_fract`
+      - ``min``
+      - Minimum frame interval [s].
+    * - struct :c:type:`v4l2_fract`
+      - ``max``
+      - Maximum frame interval [s].
+    * - struct :c:type:`v4l2_fract`
+      - ``step``
+      - Frame interval step size [s].
+
+
+.. c:type:: v4l2_frmivalenum
+
+.. tabularcolumns:: |p{1.8cm}|p{4.4cm}|p{2.4cm}|p{8.9cm}|
+
+.. flat-table:: struct v4l2_frmivalenum
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - __u32
+      - ``index``
+      - IN: Index of the given frame interval in the enumeration.
+    * - __u32
+      - ``pixel_format``
+      - IN: Pixel format for which the frame intervals are enumerated.
+    * - __u32
+      - ``width``
+      - IN: Frame width for which the frame intervals are enumerated.
+    * - __u32
+      - ``height``
+      - IN: Frame height for which the frame intervals are enumerated.
+    * - __u32
+      - ``type``
+      - OUT: Frame interval type the device supports.
+    * - union {
+      - (anonymous)
+      - OUT: Frame interval with the given index.
+    * - struct :c:type:`v4l2_fract`
+      - ``discrete``
+      - Frame interval [s].
+    * - struct :c:type:`v4l2_frmival_stepwise`
+      - ``stepwise``
+      -
+    * - }
+      -
+      -
+    * - __u32
+      - ``reserved[2]``
+      -
+      - Reserved space for future use. Must be zeroed by drivers and
+	applications.
+
+
+Enums
+=====
+
+.. c:type:: v4l2_frmivaltypes
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. flat-table:: enum v4l2_frmivaltypes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_FRMIVAL_TYPE_DISCRETE``
+      - 1
+      - Discrete frame interval.
+    * - ``V4L2_FRMIVAL_TYPE_CONTINUOUS``
+      - 2
+      - Continuous frame interval.
+    * - ``V4L2_FRMIVAL_TYPE_STEPWISE``
+      - 3
+      - Step-wise defined frame interval.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enum-framesizes.rst b/Documentation/userspace-api/media/v4l/vidioc-enum-framesizes.rst
new file mode 100644
index 000000000..c9a36bcf6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enum-framesizes.rst
@@ -0,0 +1,198 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUM_FRAMESIZES:
+
+****************************
+ioctl VIDIOC_ENUM_FRAMESIZES
+****************************
+
+Name
+====
+
+VIDIOC_ENUM_FRAMESIZES - Enumerate frame sizes
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUM_FRAMESIZES
+
+``int ioctl(int fd, VIDIOC_ENUM_FRAMESIZES, struct v4l2_frmsizeenum *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_frmsizeenum`
+    that contains an index and pixel format and receives a frame width
+    and height.
+
+Description
+===========
+
+This ioctl allows applications to enumerate all frame sizes (i. e. width
+and height in pixels) that the device supports for the given pixel
+format.
+
+The supported pixel formats can be obtained by using the
+:ref:`VIDIOC_ENUM_FMT` function.
+
+The return value and the content of the ``v4l2_frmsizeenum.type`` field
+depend on the type of frame sizes the device supports. Here are the
+semantics of the function for the different cases:
+
+-  **Discrete:** The function returns success if the given index value
+   (zero-based) is valid. The application should increase the index by
+   one for each call until ``EINVAL`` is returned. The
+   ``v4l2_frmsizeenum.type`` field is set to
+   ``V4L2_FRMSIZE_TYPE_DISCRETE`` by the driver. Of the union only the
+   ``discrete`` member is valid.
+
+-  **Step-wise:** The function returns success if the given index value
+   is zero and ``EINVAL`` for any other index value. The
+   ``v4l2_frmsizeenum.type`` field is set to
+   ``V4L2_FRMSIZE_TYPE_STEPWISE`` by the driver. Of the union only the
+   ``stepwise`` member is valid.
+
+-  **Continuous:** This is a special case of the step-wise type above.
+   The function returns success if the given index value is zero and
+   ``EINVAL`` for any other index value. The ``v4l2_frmsizeenum.type``
+   field is set to ``V4L2_FRMSIZE_TYPE_CONTINUOUS`` by the driver. Of
+   the union only the ``stepwise`` member is valid and the
+   ``step_width`` and ``step_height`` values are set to 1.
+
+When the application calls the function with index zero, it must check
+the ``type`` field to determine the type of frame size enumeration the
+device supports. Only for the ``V4L2_FRMSIZE_TYPE_DISCRETE`` type does
+it make sense to increase the index value to receive more frame sizes.
+
+.. note::
+
+   The order in which the frame sizes are returned has no special
+   meaning. In particular does it not say anything about potential default
+   format sizes.
+
+Applications can assume that the enumeration data does not change
+without any interaction from the application itself. This means that the
+enumeration data is consistent if the application does not perform any
+other ioctl calls while it runs the frame size enumeration.
+
+Structs
+=======
+
+In the structs below, *IN* denotes a value that has to be filled in by
+the application, *OUT* denotes values that the driver fills in. The
+application should zero out all members except for the *IN* fields.
+
+.. c:type:: v4l2_frmsize_discrete
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_frmsize_discrete
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``width``
+      - Width of the frame [pixel].
+    * - __u32
+      - ``height``
+      - Height of the frame [pixel].
+
+
+.. c:type:: v4l2_frmsize_stepwise
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_frmsize_stepwise
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``min_width``
+      - Minimum frame width [pixel].
+    * - __u32
+      - ``max_width``
+      - Maximum frame width [pixel].
+    * - __u32
+      - ``step_width``
+      - Frame width step size [pixel].
+    * - __u32
+      - ``min_height``
+      - Minimum frame height [pixel].
+    * - __u32
+      - ``max_height``
+      - Maximum frame height [pixel].
+    * - __u32
+      - ``step_height``
+      - Frame height step size [pixel].
+
+
+.. c:type:: v4l2_frmsizeenum
+
+.. tabularcolumns:: |p{1.4cm}|p{5.9cm}|p{2.3cm}|p{8.0cm}|
+
+.. flat-table:: struct v4l2_frmsizeenum
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - __u32
+      - ``index``
+      - IN: Index of the given frame size in the enumeration.
+    * - __u32
+      - ``pixel_format``
+      - IN: Pixel format for which the frame sizes are enumerated.
+    * - __u32
+      - ``type``
+      - OUT: Frame size type the device supports.
+    * - union {
+      - (anonymous)
+      - OUT: Frame size with the given index.
+    * - struct :c:type:`v4l2_frmsize_discrete`
+      - ``discrete``
+      -
+    * - struct :c:type:`v4l2_frmsize_stepwise`
+      - ``stepwise``
+      -
+    * - }
+      -
+      -
+    * - __u32
+      - ``reserved[2]``
+      - Reserved space for future use. Must be zeroed by drivers and
+	applications.
+
+
+Enums
+=====
+
+.. c:type:: v4l2_frmsizetypes
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. flat-table:: enum v4l2_frmsizetypes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_FRMSIZE_TYPE_DISCRETE``
+      - 1
+      - Discrete frame size.
+    * - ``V4L2_FRMSIZE_TYPE_CONTINUOUS``
+      - 2
+      - Continuous frame size.
+    * - ``V4L2_FRMSIZE_TYPE_STEPWISE``
+      - 3
+      - Step-wise defined frame size.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enum-freq-bands.rst b/Documentation/userspace-api/media/v4l/vidioc-enum-freq-bands.rst
new file mode 100644
index 000000000..a0764fca8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enum-freq-bands.rst
@@ -0,0 +1,139 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUM_FREQ_BANDS:
+
+****************************
+ioctl VIDIOC_ENUM_FREQ_BANDS
+****************************
+
+Name
+====
+
+VIDIOC_ENUM_FREQ_BANDS - Enumerate supported frequency bands
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUM_FREQ_BANDS
+
+``int ioctl(int fd, VIDIOC_ENUM_FREQ_BANDS, struct v4l2_frequency_band *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_frequency_band`.
+
+Description
+===========
+
+Enumerates the frequency bands that a tuner or modulator supports. To do
+this applications initialize the ``tuner``, ``type`` and ``index``
+fields, and zero out the ``reserved`` array of a struct
+:c:type:`v4l2_frequency_band` and call the
+:ref:`VIDIOC_ENUM_FREQ_BANDS` ioctl with a pointer to this structure.
+
+This ioctl is supported if the ``V4L2_TUNER_CAP_FREQ_BANDS`` capability
+of the corresponding tuner/modulator is set.
+
+.. tabularcolumns:: |p{2.9cm}|p{2.9cm}|p{5.8cm}|p{2.9cm}|p{3.0cm}|
+
+.. c:type:: v4l2_frequency_band
+
+.. flat-table:: struct v4l2_frequency_band
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2 1 1
+
+    * - __u32
+      - ``tuner``
+      - The tuner or modulator index number. This is the same value as in
+	the struct :c:type:`v4l2_input` ``tuner`` field and
+	the struct :c:type:`v4l2_tuner` ``index`` field, or
+	the struct :c:type:`v4l2_output` ``modulator`` field
+	and the struct :c:type:`v4l2_modulator` ``index``
+	field.
+    * - __u32
+      - ``type``
+      - The tuner type. This is the same value as in the struct
+	:c:type:`v4l2_tuner` ``type`` field. The type must be
+	set to ``V4L2_TUNER_RADIO`` for ``/dev/radioX`` device nodes, and
+	to ``V4L2_TUNER_ANALOG_TV`` for all others. Set this field to
+	``V4L2_TUNER_RADIO`` for modulators (currently only radio
+	modulators are supported). See :c:type:`v4l2_tuner_type`
+    * - __u32
+      - ``index``
+      - Identifies the frequency band, set by the application.
+    * - __u32
+      - ``capability``
+      - :cspan:`2` The tuner/modulator capability flags for this
+	frequency band, see :ref:`tuner-capability`. The
+	``V4L2_TUNER_CAP_LOW`` or ``V4L2_TUNER_CAP_1HZ`` capability must
+	be the same for all frequency bands of the selected
+	tuner/modulator. So either all bands have that capability set, or
+	none of them have that capability.
+    * - __u32
+      - ``rangelow``
+      - :cspan:`2` The lowest tunable frequency in units of 62.5 kHz, or
+	if the ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in units
+	of 62.5 Hz, for this frequency band. A 1 Hz unit is used when the
+	``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is set.
+    * - __u32
+      - ``rangehigh``
+      - :cspan:`2` The highest tunable frequency in units of 62.5 kHz,
+	or if the ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in
+	units of 62.5 Hz, for this frequency band. A 1 Hz unit is used
+	when the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is set.
+    * - __u32
+      - ``modulation``
+      - :cspan:`2` The supported modulation systems of this frequency
+	band. See :ref:`band-modulation`.
+
+	.. note::
+
+	   Currently only one modulation system per frequency band
+	   is supported. More work will need to be done if multiple
+	   modulation systems are possible. Contact the linux-media
+	   mailing list
+	   (`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__)
+	   if you need such functionality.
+    * - __u32
+      - ``reserved``\ [9]
+      - Reserved for future extensions.
+
+	Applications and drivers must set the array to zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _band-modulation:
+
+.. flat-table:: Band Modulation Systems
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_BAND_MODULATION_VSB``
+      - 0x02
+      - Vestigial Sideband modulation, used for analog TV.
+    * - ``V4L2_BAND_MODULATION_FM``
+      - 0x04
+      - Frequency Modulation, commonly used for analog radio.
+    * - ``V4L2_BAND_MODULATION_AM``
+      - 0x08
+      - Amplitude Modulation, commonly used for analog radio.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The ``tuner`` or ``index`` is out of bounds or the ``type`` field is
+    wrong.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enumaudio.rst b/Documentation/userspace-api/media/v4l/vidioc-enumaudio.rst
new file mode 100644
index 000000000..7873e5434
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enumaudio.rst
@@ -0,0 +1,53 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUMAUDIO:
+
+**********************
+ioctl VIDIOC_ENUMAUDIO
+**********************
+
+Name
+====
+
+VIDIOC_ENUMAUDIO - Enumerate audio inputs
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUMAUDIO
+
+``int ioctl(int fd, VIDIOC_ENUMAUDIO, struct v4l2_audio *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_audio`.
+
+Description
+===========
+
+To query the attributes of an audio input applications initialize the
+``index`` field and zero out the ``reserved`` array of a struct
+:c:type:`v4l2_audio` and call the :ref:`VIDIOC_ENUMAUDIO`
+ioctl with a pointer to this structure. Drivers fill the rest of the
+structure or return an ``EINVAL`` error code when the index is out of
+bounds. To enumerate all audio inputs applications shall begin at index
+zero, incrementing by one until the driver returns ``EINVAL``.
+
+See :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` for a description of struct
+:c:type:`v4l2_audio`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The number of the audio input is out of bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enumaudioout.rst b/Documentation/userspace-api/media/v4l/vidioc-enumaudioout.rst
new file mode 100644
index 000000000..d4c3ba320
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enumaudioout.rst
@@ -0,0 +1,58 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUMAUDOUT:
+
+***********************
+ioctl VIDIOC_ENUMAUDOUT
+***********************
+
+Name
+====
+
+VIDIOC_ENUMAUDOUT - Enumerate audio outputs
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUMAUDOUT
+
+``int ioctl(int fd, VIDIOC_ENUMAUDOUT, struct v4l2_audioout *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_audioout`.
+
+Description
+===========
+
+To query the attributes of an audio output applications initialize the
+``index`` field and zero out the ``reserved`` array of a struct
+:c:type:`v4l2_audioout` and call the ``VIDIOC_G_AUDOUT``
+ioctl with a pointer to this structure. Drivers fill the rest of the
+structure or return an ``EINVAL`` error code when the index is out of
+bounds. To enumerate all audio outputs applications shall begin at index
+zero, incrementing by one until the driver returns ``EINVAL``.
+
+.. note::
+
+    Connectors on a TV card to loop back the received audio signal
+    to a sound card are not audio outputs in this sense.
+
+See :ref:`VIDIOC_G_AUDIOout <VIDIOC_G_AUDOUT>` for a description of struct
+:c:type:`v4l2_audioout`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The number of the audio output is out of bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enuminput.rst b/Documentation/userspace-api/media/v4l/vidioc-enuminput.rst
new file mode 100644
index 000000000..0f62e681a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enuminput.rst
@@ -0,0 +1,229 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUMINPUT:
+
+**********************
+ioctl VIDIOC_ENUMINPUT
+**********************
+
+Name
+====
+
+VIDIOC_ENUMINPUT - Enumerate video inputs
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUMINPUT
+
+``int ioctl(int fd, VIDIOC_ENUMINPUT, struct v4l2_input *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_input`.
+
+Description
+===========
+
+To query the attributes of a video input applications initialize the
+``index`` field of struct :c:type:`v4l2_input` and call the
+:ref:`VIDIOC_ENUMINPUT` with a pointer to this structure. Drivers
+fill the rest of the structure or return an ``EINVAL`` error code when the
+index is out of bounds. To enumerate all inputs applications shall begin
+at index zero, incrementing by one until the driver returns ``EINVAL``.
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_input
+
+.. flat-table:: struct v4l2_input
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Identifies the input, set by the application.
+    * - __u8
+      - ``name``\ [32]
+      - Name of the video input, a NUL-terminated ASCII string, for
+	example: "Vin (Composite 2)". This information is intended for the
+	user, preferably the connector label on the device itself.
+    * - __u32
+      - ``type``
+      - Type of the input, see :ref:`input-type`.
+    * - __u32
+      - ``audioset``
+      - Drivers can enumerate up to 32 video and audio inputs. This field
+	shows which audio inputs were selectable as audio source if this
+	was the currently selected video input. It is a bit mask. The LSB
+	corresponds to audio input 0, the MSB to input 31. Any number of
+	bits can be set, or none.
+
+	When the driver does not enumerate audio inputs no bits must be
+	set. Applications shall not interpret this as lack of audio
+	support. Some drivers automatically select audio sources and do
+	not enumerate them since there is no choice anyway.
+
+	For details on audio inputs and how to select the current input
+	see :ref:`audio`.
+    * - __u32
+      - ``tuner``
+      - Capture devices can have zero or more tuners (RF demodulators).
+	When the ``type`` is set to ``V4L2_INPUT_TYPE_TUNER`` this is an
+	RF connector and this field identifies the tuner. It corresponds
+	to struct :c:type:`v4l2_tuner` field ``index``. For
+	details on tuners see :ref:`tuner`.
+    * - :ref:`v4l2_std_id <v4l2-std-id>`
+      - ``std``
+      - Every video input supports one or more different video standards.
+	This field is a set of all supported standards. For details on
+	video standards and how to switch see :ref:`standard`.
+    * - __u32
+      - ``status``
+      - This field provides status information about the input. See
+	:ref:`input-status` for flags. With the exception of the sensor
+	orientation bits ``status`` is only valid when this is the current
+	input.
+    * - __u32
+      - ``capabilities``
+      - This field provides capabilities for the input. See
+	:ref:`input-capabilities` for flags.
+    * - __u32
+      - ``reserved``\ [3]
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _input-type:
+
+.. flat-table:: Input Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_INPUT_TYPE_TUNER``
+      - 1
+      - This input uses a tuner (RF demodulator).
+    * - ``V4L2_INPUT_TYPE_CAMERA``
+      - 2
+      - Any non-tuner video input, for example Composite Video,
+	S-Video, HDMI, camera sensor. The naming as ``_TYPE_CAMERA`` is historical,
+	today we would have called it ``_TYPE_VIDEO``.
+    * - ``V4L2_INPUT_TYPE_TOUCH``
+      - 3
+      - This input is a touch device for capturing raw touch data.
+
+
+.. tabularcolumns:: |p{4.8cm}|p{2.6cm}|p{10.1cm}|
+
+.. _input-status:
+
+.. flat-table:: Input Status Flags
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - :cspan:`2` General
+    * - ``V4L2_IN_ST_NO_POWER``
+      - 0x00000001
+      - Attached device is off.
+    * - ``V4L2_IN_ST_NO_SIGNAL``
+      - 0x00000002
+      -
+    * - ``V4L2_IN_ST_NO_COLOR``
+      - 0x00000004
+      - The hardware supports color decoding, but does not detect color
+	modulation in the signal.
+    * - :cspan:`2` Sensor Orientation
+    * - ``V4L2_IN_ST_HFLIP``
+      - 0x00000010
+      - The input is connected to a device that produces a signal that is
+	flipped horizontally and does not correct this before passing the
+	signal to userspace.
+    * - ``V4L2_IN_ST_VFLIP``
+      - 0x00000020
+      - The input is connected to a device that produces a signal that is
+	flipped vertically and does not correct this before passing the
+	signal to userspace.
+	.. note:: A 180 degree rotation is the same as HFLIP | VFLIP
+    * - :cspan:`2` Analog Video
+    * - ``V4L2_IN_ST_NO_H_LOCK``
+      - 0x00000100
+      - No horizontal sync lock.
+    * - ``V4L2_IN_ST_COLOR_KILL``
+      - 0x00000200
+      - A color killer circuit automatically disables color decoding when
+	it detects no color modulation. When this flag is set the color
+	killer is enabled *and* has shut off color decoding.
+    * - ``V4L2_IN_ST_NO_V_LOCK``
+      - 0x00000400
+      - No vertical sync lock.
+    * - ``V4L2_IN_ST_NO_STD_LOCK``
+      - 0x00000800
+      - No standard format lock in case of auto-detection format
+	by the component.
+    * - :cspan:`2` Digital Video
+    * - ``V4L2_IN_ST_NO_SYNC``
+      - 0x00010000
+      - No synchronization lock.
+    * - ``V4L2_IN_ST_NO_EQU``
+      - 0x00020000
+      - No equalizer lock.
+    * - ``V4L2_IN_ST_NO_CARRIER``
+      - 0x00040000
+      - Carrier recovery failed.
+    * - :cspan:`2` VCR and Set-Top Box
+    * - ``V4L2_IN_ST_MACROVISION``
+      - 0x01000000
+      - Macrovision is an analog copy prevention system mangling the video
+	signal to confuse video recorders. When this flag is set
+	Macrovision has been detected.
+    * - ``V4L2_IN_ST_NO_ACCESS``
+      - 0x02000000
+      - Conditional access denied.
+    * - ``V4L2_IN_ST_VTR``
+      - 0x04000000
+      - VTR time constant. [?]
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _input-capabilities:
+
+.. flat-table:: Input capabilities
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_IN_CAP_DV_TIMINGS``
+      - 0x00000002
+      - This input supports setting video timings by using
+	``VIDIOC_S_DV_TIMINGS``.
+    * - ``V4L2_IN_CAP_STD``
+      - 0x00000004
+      - This input supports setting the TV standard by using
+	``VIDIOC_S_STD``.
+    * - ``V4L2_IN_CAP_NATIVE_SIZE``
+      - 0x00000008
+      - This input supports setting the native size using the
+	``V4L2_SEL_TGT_NATIVE_SIZE`` selection target, see
+	:ref:`v4l2-selections-common`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_input` ``index`` is out of
+    bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enumoutput.rst b/Documentation/userspace-api/media/v4l/vidioc-enumoutput.rst
new file mode 100644
index 000000000..91fcf9909
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enumoutput.rst
@@ -0,0 +1,153 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUMOUTPUT:
+
+***********************
+ioctl VIDIOC_ENUMOUTPUT
+***********************
+
+Name
+====
+
+VIDIOC_ENUMOUTPUT - Enumerate video outputs
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUMOUTPUT
+
+``int ioctl(int fd, VIDIOC_ENUMOUTPUT, struct v4l2_output *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_output`.
+
+Description
+===========
+
+To query the attributes of a video outputs applications initialize the
+``index`` field of struct :c:type:`v4l2_output` and call
+the :ref:`VIDIOC_ENUMOUTPUT` with a pointer to this structure.
+Drivers fill the rest of the structure or return an ``EINVAL`` error code
+when the index is out of bounds. To enumerate all outputs applications
+shall begin at index zero, incrementing by one until the driver returns
+``EINVAL``.
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_output
+
+.. flat-table:: struct v4l2_output
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Identifies the output, set by the application.
+    * - __u8
+      - ``name``\ [32]
+      - Name of the video output, a NUL-terminated ASCII string, for
+	example: "Vout". This information is intended for the user,
+	preferably the connector label on the device itself.
+    * - __u32
+      - ``type``
+      - Type of the output, see :ref:`output-type`.
+    * - __u32
+      - ``audioset``
+      - Drivers can enumerate up to 32 video and audio outputs. This field
+	shows which audio outputs were selectable as the current output if
+	this was the currently selected video output. It is a bit mask.
+	The LSB corresponds to audio output 0, the MSB to output 31. Any
+	number of bits can be set, or none.
+
+	When the driver does not enumerate audio outputs no bits must be
+	set. Applications shall not interpret this as lack of audio
+	support. Drivers may automatically select audio outputs without
+	enumerating them.
+
+	For details on audio outputs and how to select the current output
+	see :ref:`audio`.
+    * - __u32
+      - ``modulator``
+      - Output devices can have zero or more RF modulators. When the
+	``type`` is ``V4L2_OUTPUT_TYPE_MODULATOR`` this is an RF connector
+	and this field identifies the modulator. It corresponds to struct
+	:c:type:`v4l2_modulator` field ``index``. For
+	details on modulators see :ref:`tuner`.
+    * - :ref:`v4l2_std_id <v4l2-std-id>`
+      - ``std``
+      - Every video output supports one or more different video standards.
+	This field is a set of all supported standards. For details on
+	video standards and how to switch see :ref:`standard`.
+    * - __u32
+      - ``capabilities``
+      - This field provides capabilities for the output. See
+	:ref:`output-capabilities` for flags.
+    * - __u32
+      - ``reserved``\ [3]
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+
+.. tabularcolumns:: |p{7.0cm}|p{1.8cm}|p{8.7cm}|
+
+.. _output-type:
+
+.. flat-table:: Output Type
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_OUTPUT_TYPE_MODULATOR``
+      - 1
+      - This output is an analog TV modulator.
+    * - ``V4L2_OUTPUT_TYPE_ANALOG``
+      - 2
+      - Any non-modulator video output, for example Composite Video,
+	S-Video, HDMI. The naming as ``_TYPE_ANALOG`` is historical,
+	today we would have called it ``_TYPE_VIDEO``.
+    * - ``V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY``
+      - 3
+      - The video output will be copied to a :ref:`video overlay <overlay>`.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _output-capabilities:
+
+.. flat-table:: Output capabilities
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_OUT_CAP_DV_TIMINGS``
+      - 0x00000002
+      - This output supports setting video timings by using
+	``VIDIOC_S_DV_TIMINGS``.
+    * - ``V4L2_OUT_CAP_STD``
+      - 0x00000004
+      - This output supports setting the TV standard by using
+	``VIDIOC_S_STD``.
+    * - ``V4L2_OUT_CAP_NATIVE_SIZE``
+      - 0x00000008
+      - This output supports setting the native size using the
+	``V4L2_SEL_TGT_NATIVE_SIZE`` selection target, see
+	:ref:`v4l2-selections-common`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_output` ``index`` is out of
+    bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-enumstd.rst b/Documentation/userspace-api/media/v4l/vidioc-enumstd.rst
new file mode 100644
index 000000000..b5704e8cf
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-enumstd.rst
@@ -0,0 +1,351 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_ENUMSTD:
+
+*******************************************
+ioctl VIDIOC_ENUMSTD, VIDIOC_SUBDEV_ENUMSTD
+*******************************************
+
+Name
+====
+
+VIDIOC_ENUMSTD - VIDIOC_SUBDEV_ENUMSTD - Enumerate supported video standards
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_ENUMSTD
+
+``int ioctl(int fd, VIDIOC_ENUMSTD, struct v4l2_standard *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_ENUMSTD
+
+``int ioctl(int fd, VIDIOC_SUBDEV_ENUMSTD, struct v4l2_standard *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_standard`.
+
+Description
+===========
+
+To query the attributes of a video standard, especially a custom (driver
+defined) one, applications initialize the ``index`` field of struct
+:c:type:`v4l2_standard` and call the :ref:`VIDIOC_ENUMSTD`
+ioctl with a pointer to this structure. Drivers fill the rest of the
+structure or return an ``EINVAL`` error code when the index is out of
+bounds. To enumerate all standards applications shall begin at index
+zero, incrementing by one until the driver returns ``EINVAL``. Drivers may
+enumerate a different set of standards after switching the video input
+or output. [#f1]_
+
+.. c:type:: v4l2_standard
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_standard
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Number of the video standard, set by the application.
+    * - :ref:`v4l2_std_id <v4l2-std-id>`
+      - ``id``
+      - The bits in this field identify the standard as one of the common
+	standards listed in :ref:`v4l2-std-id`, or if bits 32 to 63 are
+	set as custom standards. Multiple bits can be set if the hardware
+	does not distinguish between these standards, however separate
+	indices do not indicate the opposite. The ``id`` must be unique.
+	No other enumerated struct :c:type:`v4l2_standard` structure,
+	for this input or output anyway, can contain the same set of bits.
+    * - __u8
+      - ``name``\ [24]
+      - Name of the standard, a NUL-terminated ASCII string, for example:
+	"PAL-B/G", "NTSC Japan". This information is intended for the
+	user.
+    * - struct :c:type:`v4l2_fract`
+      - ``frameperiod``
+      - The frame period (not field period) is numerator / denominator.
+	For example M/NTSC has a frame period of 1001 / 30000 seconds.
+    * - __u32
+      - ``framelines``
+      - Total lines per frame including blanking, e. g. 625 for B/PAL.
+    * - __u32
+      - ``reserved``\ [4]
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+
+.. c:type:: v4l2_fract
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_fract
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``numerator``
+      -
+    * - __u32
+      - ``denominator``
+      -
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. _v4l2-std-id:
+
+.. flat-table:: typedef v4l2_std_id
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u64
+      - ``v4l2_std_id``
+      - This type is a set, each bit representing another video standard
+	as listed below and in :ref:`video-standards`. The 32 most
+	significant bits are reserved for custom (driver defined) video
+	standards.
+
+
+.. code-block:: c
+
+    #define V4L2_STD_PAL_B          ((v4l2_std_id)0x00000001)
+    #define V4L2_STD_PAL_B1         ((v4l2_std_id)0x00000002)
+    #define V4L2_STD_PAL_G          ((v4l2_std_id)0x00000004)
+    #define V4L2_STD_PAL_H          ((v4l2_std_id)0x00000008)
+    #define V4L2_STD_PAL_I          ((v4l2_std_id)0x00000010)
+    #define V4L2_STD_PAL_D          ((v4l2_std_id)0x00000020)
+    #define V4L2_STD_PAL_D1         ((v4l2_std_id)0x00000040)
+    #define V4L2_STD_PAL_K          ((v4l2_std_id)0x00000080)
+
+    #define V4L2_STD_PAL_M          ((v4l2_std_id)0x00000100)
+    #define V4L2_STD_PAL_N          ((v4l2_std_id)0x00000200)
+    #define V4L2_STD_PAL_Nc         ((v4l2_std_id)0x00000400)
+    #define V4L2_STD_PAL_60         ((v4l2_std_id)0x00000800)
+
+``V4L2_STD_PAL_60`` is a hybrid standard with 525 lines, 60 Hz refresh
+rate, and PAL color modulation with a 4.43 MHz color subcarrier. Some
+PAL video recorders can play back NTSC tapes in this mode for display on
+a 50/60 Hz agnostic PAL TV.
+
+.. code-block:: c
+
+    #define V4L2_STD_NTSC_M         ((v4l2_std_id)0x00001000)
+    #define V4L2_STD_NTSC_M_JP      ((v4l2_std_id)0x00002000)
+    #define V4L2_STD_NTSC_443       ((v4l2_std_id)0x00004000)
+
+``V4L2_STD_NTSC_443`` is a hybrid standard with 525 lines, 60 Hz refresh
+rate, and NTSC color modulation with a 4.43 MHz color subcarrier.
+
+.. code-block:: c
+
+    #define V4L2_STD_NTSC_M_KR      ((v4l2_std_id)0x00008000)
+
+    #define V4L2_STD_SECAM_B        ((v4l2_std_id)0x00010000)
+    #define V4L2_STD_SECAM_D        ((v4l2_std_id)0x00020000)
+    #define V4L2_STD_SECAM_G        ((v4l2_std_id)0x00040000)
+    #define V4L2_STD_SECAM_H        ((v4l2_std_id)0x00080000)
+    #define V4L2_STD_SECAM_K        ((v4l2_std_id)0x00100000)
+    #define V4L2_STD_SECAM_K1       ((v4l2_std_id)0x00200000)
+    #define V4L2_STD_SECAM_L        ((v4l2_std_id)0x00400000)
+    #define V4L2_STD_SECAM_LC       ((v4l2_std_id)0x00800000)
+
+    /* ATSC/HDTV */
+    #define V4L2_STD_ATSC_8_VSB     ((v4l2_std_id)0x01000000)
+    #define V4L2_STD_ATSC_16_VSB    ((v4l2_std_id)0x02000000)
+
+``V4L2_STD_ATSC_8_VSB`` and ``V4L2_STD_ATSC_16_VSB`` are U.S.
+terrestrial digital TV standards. Presently the V4L2 API does not
+support digital TV. See also the Linux DVB API at
+`https://linuxtv.org <https://linuxtv.org>`__.
+
+.. code-block:: c
+
+    #define V4L2_STD_PAL_BG         (V4L2_STD_PAL_B         |
+		     V4L2_STD_PAL_B1        |
+		     V4L2_STD_PAL_G)
+    #define V4L2_STD_B              (V4L2_STD_PAL_B         |
+		     V4L2_STD_PAL_B1        |
+		     V4L2_STD_SECAM_B)
+    #define V4L2_STD_GH             (V4L2_STD_PAL_G         |
+		     V4L2_STD_PAL_H         |
+		     V4L2_STD_SECAM_G       |
+		     V4L2_STD_SECAM_H)
+    #define V4L2_STD_PAL_DK         (V4L2_STD_PAL_D         |
+		     V4L2_STD_PAL_D1        |
+		     V4L2_STD_PAL_K)
+    #define V4L2_STD_PAL            (V4L2_STD_PAL_BG        |
+		     V4L2_STD_PAL_DK        |
+		     V4L2_STD_PAL_H         |
+		     V4L2_STD_PAL_I)
+    #define V4L2_STD_NTSC           (V4L2_STD_NTSC_M        |
+		     V4L2_STD_NTSC_M_JP     |
+		     V4L2_STD_NTSC_M_KR)
+    #define V4L2_STD_MN             (V4L2_STD_PAL_M         |
+		     V4L2_STD_PAL_N         |
+		     V4L2_STD_PAL_Nc        |
+		     V4L2_STD_NTSC)
+    #define V4L2_STD_SECAM_DK       (V4L2_STD_SECAM_D       |
+		     V4L2_STD_SECAM_K       |
+		     V4L2_STD_SECAM_K1)
+    #define V4L2_STD_DK             (V4L2_STD_PAL_DK        |
+		     V4L2_STD_SECAM_DK)
+
+    #define V4L2_STD_SECAM          (V4L2_STD_SECAM_B       |
+		     V4L2_STD_SECAM_G       |
+		     V4L2_STD_SECAM_H       |
+		     V4L2_STD_SECAM_DK      |
+		     V4L2_STD_SECAM_L       |
+		     V4L2_STD_SECAM_LC)
+
+    #define V4L2_STD_525_60         (V4L2_STD_PAL_M         |
+		     V4L2_STD_PAL_60        |
+		     V4L2_STD_NTSC          |
+		     V4L2_STD_NTSC_443)
+    #define V4L2_STD_625_50         (V4L2_STD_PAL           |
+		     V4L2_STD_PAL_N         |
+		     V4L2_STD_PAL_Nc        |
+		     V4L2_STD_SECAM)
+
+    #define V4L2_STD_UNKNOWN        0
+    #define V4L2_STD_ALL            (V4L2_STD_525_60        |
+		     V4L2_STD_625_50)
+
+.. raw:: latex
+
+    \begingroup
+    \tiny
+    \setlength{\tabcolsep}{2pt}
+
+..                            NTSC/M   PAL/M    /N       /B       /D       /H       /I        SECAM/B    /D       /K1     /L
+.. tabularcolumns:: |p{1.43cm}|p{1.38cm}|p{1.59cm}|p{1.7cm}|p{1.7cm}|p{1.17cm}|p{0.64cm}|p{1.71cm}|p{1.6cm}|p{1.07cm}|p{1.07cm}|p{1.07cm}|
+
+.. _video-standards:
+
+.. flat-table:: Video Standards (based on :ref:`itu470`)
+    :header-rows:  1
+    :stub-columns: 0
+
+    * - Characteristics
+      - M/NTSC [#f2]_
+      - M/PAL
+      - N/PAL [#f3]_
+      - B, B1, G/PAL
+      - D, D1, K/PAL
+      - H/PAL
+      - I/PAL
+      - B, G/SECAM
+      - D, K/SECAM
+      - K1/SECAM
+      - L/SECAM
+    * - Frame lines
+      - :cspan:`1` 525
+      - :cspan:`8` 625
+    * - Frame period (s)
+      - :cspan:`1` 1001/30000
+      - :cspan:`8` 1/25
+    * - Chrominance sub-carrier frequency (Hz)
+      - 3579545 ± 10
+      - 3579611.49 ± 10
+      - 4433618.75 ± 5
+
+	(3582056.25 ± 5)
+      - :cspan:`3` 4433618.75 ± 5
+      - 4433618.75 ± 1
+      - :cspan:`2` f\ :sub:`OR` = 4406250 ± 2000,
+
+	f\ :sub:`OB` = 4250000 ± 2000
+    * - Nominal radio-frequency channel bandwidth (MHz)
+      - 6
+      - 6
+      - 6
+      - B: 7; B1, G: 8
+      - 8
+      - 8
+      - 8
+      - 8
+      - 8
+      - 8
+      - 8
+    * - Sound carrier relative to vision carrier (MHz)
+      - 4.5
+      - 4.5
+      - 4.5
+      - 5.5 ± 0.001  [#f4]_  [#f5]_  [#f6]_  [#f7]_
+      - 6.5 ± 0.001
+      - 5.5
+      - 5.9996 ± 0.0005
+      - 5.5 ± 0.001
+      - 6.5 ± 0.001
+      - 6.5
+      - 6.5 [#f8]_
+
+.. raw:: latex
+
+    \endgroup
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_standard` ``index`` is out
+    of bounds.
+
+ENODATA
+    Standard video timings are not supported for this input or output.
+
+.. [#f1]
+   The supported standards may overlap and we need an unambiguous set to
+   find the current standard returned by :ref:`VIDIOC_G_STD <VIDIOC_G_STD>`.
+
+.. [#f2]
+   Japan uses a standard similar to M/NTSC (V4L2_STD_NTSC_M_JP).
+
+.. [#f3]
+   The values in brackets apply to the combination N/PAL a.k.a.
+   N\ :sub:`C` used in Argentina (V4L2_STD_PAL_Nc).
+
+.. [#f4]
+   In the Federal Republic of Germany, Austria, Italy, the Netherlands,
+   Slovakia and Switzerland a system of two sound carriers is used, the
+   frequency of the second carrier being 242.1875 kHz above the
+   frequency of the first sound carrier. For stereophonic sound
+   transmissions a similar system is used in Australia.
+
+.. [#f5]
+   New Zealand uses a sound carrier displaced 5.4996 ± 0.0005 MHz from
+   the vision carrier.
+
+.. [#f6]
+   In Denmark, Finland, New Zealand, Sweden and Spain a system of two
+   sound carriers is used. In Iceland, Norway and Poland the same system
+   is being introduced. The second carrier is 5.85 MHz above the vision
+   carrier and is DQPSK modulated with 728 kbit/s sound and data
+   multiplex. (NICAM system)
+
+.. [#f7]
+   In the United Kingdom, a system of two sound carriers is used. The
+   second sound carrier is 6.552 MHz above the vision carrier and is
+   DQPSK modulated with a 728 kbit/s sound and data multiplex able to
+   carry two sound channels. (NICAM system)
+
+.. [#f8]
+   In France, a digital carrier 5.85 MHz away from the vision carrier
+   may be used in addition to the main sound carrier. It is modulated in
+   differentially encoded QPSK with a 728 kbit/s sound and data
+   multiplexer capable of carrying two sound channels. (NICAM system)
diff --git a/Documentation/userspace-api/media/v4l/vidioc-expbuf.rst b/Documentation/userspace-api/media/v4l/vidioc-expbuf.rst
new file mode 100644
index 000000000..212377c90
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-expbuf.rst
@@ -0,0 +1,162 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_EXPBUF:
+
+*******************
+ioctl VIDIOC_EXPBUF
+*******************
+
+Name
+====
+
+VIDIOC_EXPBUF - Export a buffer as a DMABUF file descriptor.
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_EXPBUF
+
+``int ioctl(int fd, VIDIOC_EXPBUF, struct v4l2_exportbuffer *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_exportbuffer`.
+
+Description
+===========
+
+This ioctl is an extension to the :ref:`memory mapping <mmap>` I/O
+method, therefore it is available only for ``V4L2_MEMORY_MMAP`` buffers.
+It can be used to export a buffer as a DMABUF file at any time after
+buffers have been allocated with the
+:ref:`VIDIOC_REQBUFS` ioctl.
+
+To export a buffer, applications fill struct
+:c:type:`v4l2_exportbuffer`. The ``type`` field is
+set to the same buffer type as was previously used with struct
+:c:type:`v4l2_requestbuffers` ``type``.
+Applications must also set the ``index`` field. Valid index numbers
+range from zero to the number of buffers allocated with
+:ref:`VIDIOC_REQBUFS` (struct
+:c:type:`v4l2_requestbuffers` ``count``) minus
+one. For the multi-planar API, applications set the ``plane`` field to
+the index of the plane to be exported. Valid planes range from zero to
+the maximal number of valid planes for the currently active format. For
+the single-planar API, applications must set ``plane`` to zero.
+Additional flags may be posted in the ``flags`` field. Refer to a manual
+for open() for details. Currently only O_CLOEXEC, O_RDONLY, O_WRONLY,
+and O_RDWR are supported. All other fields must be set to zero. In the
+case of multi-planar API, every plane is exported separately using
+multiple :ref:`VIDIOC_EXPBUF` calls.
+
+After calling :ref:`VIDIOC_EXPBUF` the ``fd`` field will be set by a
+driver. This is a DMABUF file descriptor. The application may pass it to
+other DMABUF-aware devices. Refer to :ref:`DMABUF importing <dmabuf>`
+for details about importing DMABUF files into V4L2 nodes. It is
+recommended to close a DMABUF file when it is no longer used to allow
+the associated memory to be reclaimed.
+
+Examples
+========
+
+.. code-block:: c
+
+    int buffer_export(int v4lfd, enum v4l2_buf_type bt, int index, int *dmafd)
+    {
+	struct v4l2_exportbuffer expbuf;
+
+	memset(&expbuf, 0, sizeof(expbuf));
+	expbuf.type = bt;
+	expbuf.index = index;
+	if (ioctl(v4lfd, VIDIOC_EXPBUF, &expbuf) == -1) {
+	    perror("VIDIOC_EXPBUF");
+	    return -1;
+	}
+
+	*dmafd = expbuf.fd;
+
+	return 0;
+    }
+
+.. code-block:: c
+
+    int buffer_export_mp(int v4lfd, enum v4l2_buf_type bt, int index,
+	int dmafd[], int n_planes)
+    {
+	int i;
+
+	for (i = 0; i < n_planes; ++i) {
+	    struct v4l2_exportbuffer expbuf;
+
+	    memset(&expbuf, 0, sizeof(expbuf));
+	    expbuf.type = bt;
+	    expbuf.index = index;
+	    expbuf.plane = i;
+	    if (ioctl(v4lfd, VIDIOC_EXPBUF, &expbuf) == -1) {
+		perror("VIDIOC_EXPBUF");
+		while (i)
+		    close(dmafd[--i]);
+		return -1;
+	    }
+	    dmafd[i] = expbuf.fd;
+	}
+
+	return 0;
+    }
+
+.. c:type:: v4l2_exportbuffer
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_exportbuffer
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of the buffer, same as struct
+	:c:type:`v4l2_format` ``type`` or struct
+	:c:type:`v4l2_requestbuffers` ``type``, set
+	by the application. See :c:type:`v4l2_buf_type`
+    * - __u32
+      - ``index``
+      - Number of the buffer, set by the application. This field is only
+	used for :ref:`memory mapping <mmap>` I/O and can range from
+	zero to the number of buffers allocated with the
+	:ref:`VIDIOC_REQBUFS` and/or
+	:ref:`VIDIOC_CREATE_BUFS` ioctls.
+    * - __u32
+      - ``plane``
+      - Index of the plane to be exported when using the multi-planar API.
+	Otherwise this value must be set to zero.
+    * - __u32
+      - ``flags``
+      - Flags for the newly created file, currently only ``O_CLOEXEC``,
+	``O_RDONLY``, ``O_WRONLY``, and ``O_RDWR`` are supported, refer to
+	the manual of open() for more details.
+    * - __s32
+      - ``fd``
+      - The DMABUF file descriptor associated with a buffer. Set by the
+	driver.
+    * - __u32
+      - ``reserved[11]``
+      - Reserved field for future use. Drivers and applications must set
+	the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    A queue is not in MMAP mode or DMABUF exporting is not supported or
+    ``flags`` or ``type`` or ``index`` or ``plane`` fields are invalid.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-audio.rst b/Documentation/userspace-api/media/v4l/vidioc-g-audio.rst
new file mode 100644
index 000000000..4c93bd55b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-audio.rst
@@ -0,0 +1,124 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_AUDIO:
+
+************************************
+ioctl VIDIOC_G_AUDIO, VIDIOC_S_AUDIO
+************************************
+
+Name
+====
+
+VIDIOC_G_AUDIO - VIDIOC_S_AUDIO - Query or select the current audio input and its attributes
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_AUDIO
+
+``int ioctl(int fd, VIDIOC_G_AUDIO, struct v4l2_audio *argp)``
+
+.. c:macro:: VIDIOC_S_AUDIO
+
+``int ioctl(int fd, VIDIOC_S_AUDIO, const struct v4l2_audio *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_audio`.
+
+Description
+===========
+
+To query the current audio input applications zero out the ``reserved``
+array of a struct :c:type:`v4l2_audio` and call the
+:ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` ioctl with a pointer to this structure. Drivers fill
+the rest of the structure or return an ``EINVAL`` error code when the device
+has no audio inputs, or none which combine with the current video input.
+
+Audio inputs have one writable property, the audio mode. To select the
+current audio input *and* change the audio mode, applications initialize
+the ``index`` and ``mode`` fields, and the ``reserved`` array of a
+struct :c:type:`v4l2_audio` structure and call the :ref:`VIDIOC_S_AUDIO <VIDIOC_G_AUDIO>`
+ioctl. Drivers may switch to a different audio mode if the request
+cannot be satisfied. However, this is a write-only ioctl, it does not
+return the actual new audio mode.
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_audio
+
+.. flat-table:: struct v4l2_audio
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Identifies the audio input, set by the driver or application.
+    * - __u8
+      - ``name``\ [32]
+      - Name of the audio input, a NUL-terminated ASCII string, for
+	example: "Line In". This information is intended for the user,
+	preferably the connector label on the device itself.
+    * - __u32
+      - ``capability``
+      - Audio capability flags, see :ref:`audio-capability`.
+    * - __u32
+      - ``mode``
+      - Audio mode flags set by drivers and applications (on
+	:ref:`VIDIOC_S_AUDIO <VIDIOC_G_AUDIO>` ioctl), see :ref:`audio-mode`.
+    * - __u32
+      - ``reserved``\ [2]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _audio-capability:
+
+.. flat-table:: Audio Capability Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_AUDCAP_STEREO``
+      - 0x00001
+      - This is a stereo input. The flag is intended to automatically
+	disable stereo recording etc. when the signal is always monaural.
+	The API provides no means to detect if stereo is *received*,
+	unless the audio input belongs to a tuner.
+    * - ``V4L2_AUDCAP_AVL``
+      - 0x00002
+      - Automatic Volume Level mode is supported.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _audio-mode:
+
+.. flat-table:: Audio Mode Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_AUDMODE_AVL``
+      - 0x00001
+      - AVL mode is on.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    No audio inputs combine with the current video input, or the number
+    of the selected audio input is out of bounds or it does not combine.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-audioout.rst b/Documentation/userspace-api/media/v4l/vidioc-g-audioout.rst
new file mode 100644
index 000000000..194f22493
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-audioout.rst
@@ -0,0 +1,99 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_AUDOUT:
+
+**************************************
+ioctl VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT
+**************************************
+
+Name
+====
+
+VIDIOC_G_AUDOUT - VIDIOC_S_AUDOUT - Query or select the current audio output
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_AUDOUT
+
+``int ioctl(int fd, VIDIOC_G_AUDOUT, struct v4l2_audioout *argp)``
+
+.. c:macro:: VIDIOC_S_AUDOUT
+
+``int ioctl(int fd, VIDIOC_S_AUDOUT, const struct v4l2_audioout *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_audioout`.
+
+Description
+===========
+
+To query the current audio output applications zero out the ``reserved``
+array of a struct :c:type:`v4l2_audioout` and call the
+``VIDIOC_G_AUDOUT`` ioctl with a pointer to this structure. Drivers fill
+the rest of the structure or return an ``EINVAL`` error code when the device
+has no audio inputs, or none which combine with the current video
+output.
+
+Audio outputs have no writable properties. Nevertheless, to select the
+current audio output applications can initialize the ``index`` field and
+``reserved`` array (which in the future may contain writable properties)
+of a struct :c:type:`v4l2_audioout` structure and call the
+``VIDIOC_S_AUDOUT`` ioctl. Drivers switch to the requested output or
+return the ``EINVAL`` error code when the index is out of bounds. This is a
+write-only ioctl, it does not return the current audio output attributes
+as ``VIDIOC_G_AUDOUT`` does.
+
+.. note::
+
+   Connectors on a TV card to loop back the received audio signal
+   to a sound card are not audio outputs in this sense.
+
+.. c:type:: v4l2_audioout
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_audioout
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Identifies the audio output, set by the driver or application.
+    * - __u8
+      - ``name``\ [32]
+      - Name of the audio output, a NUL-terminated ASCII string, for
+	example: "Line Out". This information is intended for the user,
+	preferably the connector label on the device itself.
+    * - __u32
+      - ``capability``
+      - Audio capability flags, none defined yet. Drivers must set this
+	field to zero.
+    * - __u32
+      - ``mode``
+      - Audio mode, none defined yet. Drivers and applications (on
+	``VIDIOC_S_AUDOUT``) must set this field to zero.
+    * - __u32
+      - ``reserved``\ [2]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    No audio outputs combine with the current video output, or the
+    number of the selected audio output is out of bounds or it does not
+    combine.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-crop.rst b/Documentation/userspace-api/media/v4l/vidioc-g-crop.rst
new file mode 100644
index 000000000..0ac1509e4
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-crop.rst
@@ -0,0 +1,110 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_CROP:
+
+**********************************
+ioctl VIDIOC_G_CROP, VIDIOC_S_CROP
+**********************************
+
+Name
+====
+
+VIDIOC_G_CROP - VIDIOC_S_CROP - Get or set the current cropping rectangle
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_CROP
+
+``int ioctl(int fd, VIDIOC_G_CROP, struct v4l2_crop *argp)``
+
+.. c:macro:: VIDIOC_S_CROP
+
+``int ioctl(int fd, VIDIOC_S_CROP, const struct v4l2_crop *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_crop`.
+
+Description
+===========
+
+To query the cropping rectangle size and position applications set the
+``type`` field of a struct :c:type:`v4l2_crop` structure to the
+respective buffer (stream) type and call the :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` ioctl
+with a pointer to this structure. The driver fills the rest of the
+structure or returns the ``EINVAL`` error code if cropping is not supported.
+
+To change the cropping rectangle applications initialize the ``type``
+and struct :c:type:`v4l2_rect` substructure named ``c`` of a
+v4l2_crop structure and call the :ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` ioctl with a pointer
+to this structure.
+
+The driver first adjusts the requested dimensions against hardware
+limits, i. e. the bounds given by the capture/output window, and it
+rounds to the closest possible values of horizontal and vertical offset,
+width and height. In particular the driver must round the vertical
+offset of the cropping rectangle to frame lines modulo two, such that
+the field order cannot be confused.
+
+Second the driver adjusts the image size (the opposite rectangle of the
+scaling process, source or target depending on the data direction) to
+the closest size possible while maintaining the current horizontal and
+vertical scaling factor.
+
+Finally the driver programs the hardware with the actual cropping and
+image parameters. :ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` is a write-only ioctl, it does not
+return the actual parameters. To query them applications must call
+:ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and :ref:`VIDIOC_G_FMT`. When the
+parameters are unsuitable the application may modify the cropping or
+image parameters and repeat the cycle until satisfactory parameters have
+been negotiated.
+
+When cropping is not supported then no parameters are changed and
+:ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` returns the ``EINVAL`` error code.
+
+.. c:type:: v4l2_crop
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_crop
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of the data stream, set by the application. Only these types
+	are valid here: ``V4L2_BUF_TYPE_VIDEO_CAPTURE``, ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``,
+	``V4L2_BUF_TYPE_VIDEO_OUTPUT``, ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE`` and
+	``V4L2_BUF_TYPE_VIDEO_OVERLAY``. See :c:type:`v4l2_buf_type` and the note below.
+    * - struct :c:type:`v4l2_rect`
+      - ``c``
+      - Cropping rectangle. The same co-ordinate system as for struct
+	:c:type:`v4l2_cropcap` ``bounds`` is used.
+
+.. note::
+   Unfortunately in the case of multiplanar buffer types
+   (``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` and ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``)
+   this API was messed up with regards to how the :c:type:`v4l2_crop` ``type`` field
+   should be filled in. Some drivers only accepted the ``_MPLANE`` buffer type while
+   other drivers only accepted a non-multiplanar buffer type (i.e. without the
+   ``_MPLANE`` at the end).
+
+   Starting with kernel 4.13 both variations are allowed.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+ENODATA
+    Cropping is not supported for this input or output.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ctrl.rst
new file mode 100644
index 000000000..4f1bed53f
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-ctrl.rst
@@ -0,0 +1,97 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_CTRL:
+
+**********************************
+ioctl VIDIOC_G_CTRL, VIDIOC_S_CTRL
+**********************************
+
+Name
+====
+
+VIDIOC_G_CTRL - VIDIOC_S_CTRL - Get or set the value of a control
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_CTRL
+
+``int ioctl(int fd, VIDIOC_G_CTRL, struct v4l2_control *argp)``
+
+.. c:macro:: VIDIOC_S_CTRL
+
+``int ioctl(int fd, VIDIOC_S_CTRL, struct v4l2_control *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_control`.
+
+Description
+===========
+
+To get the current value of a control applications initialize the ``id``
+field of a struct :c:type:`v4l2_control` and call the
+:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` ioctl with a pointer to this structure. To change the
+value of a control applications initialize the ``id`` and ``value``
+fields of a struct :c:type:`v4l2_control` and call the
+:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctl.
+
+When the ``id`` is invalid drivers return an ``EINVAL`` error code. When the
+``value`` is out of bounds drivers can choose to take the closest valid
+value or return an ``ERANGE`` error code, whatever seems more appropriate.
+However, :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` is a write-only ioctl, it does not return the
+actual new value. If the ``value`` is inappropriate for the control
+(e.g. if it refers to an unsupported menu index of a menu control), then
+EINVAL error code is returned as well.
+
+These ioctls work only with user controls. For other control classes the
+:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`,
+:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` or
+:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` must be used.
+
+.. c:type:: v4l2_control
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_control
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``id``
+      - Identifies the control, set by the application.
+    * - __s32
+      - ``value``
+      - New value or current value.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_control` ``id`` is invalid
+    or the ``value`` is inappropriate for the given control (i.e. if a
+    menu item is selected that is not supported by the driver according
+    to :ref:`VIDIOC_QUERYMENU <VIDIOC_QUERYCTRL>`).
+
+ERANGE
+    The struct :c:type:`v4l2_control` ``value`` is out of
+    bounds.
+
+EBUSY
+    The control is temporarily not changeable, possibly because another
+    applications took over control of the device function this control
+    belongs to.
+
+EACCES
+    Attempt to set a read-only control or to get a write-only control.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-dv-timings.rst b/Documentation/userspace-api/media/v4l/vidioc-g-dv-timings.rst
new file mode 100644
index 000000000..760a33d43
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-dv-timings.rst
@@ -0,0 +1,311 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_DV_TIMINGS:
+
+**********************************************
+ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS
+**********************************************
+
+Name
+====
+
+VIDIOC_G_DV_TIMINGS - VIDIOC_S_DV_TIMINGS - VIDIOC_SUBDEV_G_DV_TIMINGS - VIDIOC_SUBDEV_S_DV_TIMINGS - Get or set DV timings for input or output
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_DV_TIMINGS
+
+``int ioctl(int fd, VIDIOC_G_DV_TIMINGS, struct v4l2_dv_timings *argp)``
+
+.. c:macro:: VIDIOC_S_DV_TIMINGS
+
+``int ioctl(int fd, VIDIOC_S_DV_TIMINGS, struct v4l2_dv_timings *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_G_DV_TIMINGS
+
+``int ioctl(int fd, VIDIOC_SUBDEV_G_DV_TIMINGS, struct v4l2_dv_timings *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_S_DV_TIMINGS
+
+``int ioctl(int fd, VIDIOC_SUBDEV_S_DV_TIMINGS, struct v4l2_dv_timings *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_dv_timings`.
+
+Description
+===========
+
+To set DV timings for the input or output, applications use the
+:ref:`VIDIOC_S_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` ioctl and to get the current timings,
+applications use the :ref:`VIDIOC_G_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` ioctl. The detailed timing
+information is filled in using the structure struct
+:c:type:`v4l2_dv_timings`. These ioctls take a
+pointer to the struct :c:type:`v4l2_dv_timings`
+structure as argument. If the ioctl is not supported or the timing
+values are not correct, the driver returns ``EINVAL`` error code.
+
+Calling ``VIDIOC_SUBDEV_S_DV_TIMINGS`` on a subdev device node that has been
+registered in read-only mode is not allowed. An error is returned and the errno
+variable is set to ``-EPERM``.
+
+The ``linux/v4l2-dv-timings.h`` header can be used to get the timings of
+the formats in the :ref:`cea861` and :ref:`vesadmt` standards. If
+the current input or output does not support DV timings (e.g. if
+:ref:`VIDIOC_ENUMINPUT` does not set the
+``V4L2_IN_CAP_DV_TIMINGS`` flag), then ``ENODATA`` error code is returned.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    This ioctl is not supported, or the :ref:`VIDIOC_S_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>`
+    parameter was unsuitable.
+
+ENODATA
+    Digital video timings are not supported for this input or output.
+
+EBUSY
+    The device is busy and therefore can not change the timings.
+
+EPERM
+    ``VIDIOC_SUBDEV_S_DV_TIMINGS`` has been called on a read-only subdevice.
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_bt_timings
+
+.. flat-table:: struct v4l2_bt_timings
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``width``
+      - Width of the active video in pixels.
+    * - __u32
+      - ``height``
+      - Height of the active video frame in lines. So for interlaced
+	formats the height of the active video in each field is
+	``height``/2.
+    * - __u32
+      - ``interlaced``
+      - Progressive (``V4L2_DV_PROGRESSIVE``) or interlaced (``V4L2_DV_INTERLACED``).
+    * - __u32
+      - ``polarities``
+      - This is a bit mask that defines polarities of sync signals. bit 0
+	(``V4L2_DV_VSYNC_POS_POL``) is for vertical sync polarity and bit
+	1 (``V4L2_DV_HSYNC_POS_POL``) is for horizontal sync polarity. If
+	the bit is set (1) it is positive polarity and if is cleared (0),
+	it is negative polarity.
+    * - __u64
+      - ``pixelclock``
+      - Pixel clock in Hz. Ex. 74.25MHz->74250000
+    * - __u32
+      - ``hfrontporch``
+      - Horizontal front porch in pixels
+    * - __u32
+      - ``hsync``
+      - Horizontal sync length in pixels
+    * - __u32
+      - ``hbackporch``
+      - Horizontal back porch in pixels
+    * - __u32
+      - ``vfrontporch``
+      - Vertical front porch in lines. For interlaced formats this refers
+	to the odd field (aka field 1).
+    * - __u32
+      - ``vsync``
+      - Vertical sync length in lines. For interlaced formats this refers
+	to the odd field (aka field 1).
+    * - __u32
+      - ``vbackporch``
+      - Vertical back porch in lines. For interlaced formats this refers
+	to the odd field (aka field 1).
+    * - __u32
+      - ``il_vfrontporch``
+      - Vertical front porch in lines for the even field (aka field 2) of
+	interlaced field formats. Must be 0 for progressive formats.
+    * - __u32
+      - ``il_vsync``
+      - Vertical sync length in lines for the even field (aka field 2) of
+	interlaced field formats. Must be 0 for progressive formats.
+    * - __u32
+      - ``il_vbackporch``
+      - Vertical back porch in lines for the even field (aka field 2) of
+	interlaced field formats. Must be 0 for progressive formats.
+    * - __u32
+      - ``standards``
+      - The video standard(s) this format belongs to. This will be filled
+	in by the driver. Applications must set this to 0. See
+	:ref:`dv-bt-standards` for a list of standards.
+    * - __u32
+      - ``flags``
+      - Several flags giving more information about the format. See
+	:ref:`dv-bt-flags` for a description of the flags.
+    * - struct :c:type:`v4l2_fract`
+      - ``picture_aspect``
+      - The picture aspect if the pixels are not square. Only valid if the
+        ``V4L2_DV_FL_HAS_PICTURE_ASPECT`` flag is set.
+    * - __u8
+      - ``cea861_vic``
+      - The Video Identification Code according to the CEA-861 standard.
+        Only valid if the ``V4L2_DV_FL_HAS_CEA861_VIC`` flag is set.
+    * - __u8
+      - ``hdmi_vic``
+      - The Video Identification Code according to the HDMI standard.
+        Only valid if the ``V4L2_DV_FL_HAS_HDMI_VIC`` flag is set.
+    * - __u8
+      - ``reserved[46]``
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+
+.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{7.0cm}|p{3.5cm}|
+
+.. c:type:: v4l2_dv_timings
+
+.. flat-table:: struct v4l2_dv_timings
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of DV timings as listed in :ref:`dv-timing-types`.
+    * - union {
+      - (anonymous)
+    * - struct :c:type:`v4l2_bt_timings`
+      - ``bt``
+      - Timings defined by BT.656/1120 specifications
+    * - __u32
+      - ``reserved``\ [32]
+      -
+    * - }
+      -
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. _dv-timing-types:
+
+.. flat-table:: DV Timing types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - Timing type
+      - value
+      - Description
+    * -
+      -
+      -
+    * - ``V4L2_DV_BT_656_1120``
+      - 0
+      - BT.656/1120 timings
+
+.. tabularcolumns:: |p{4.5cm}|p{12.8cm}|
+
+.. _dv-bt-standards:
+
+.. flat-table:: DV BT Timing standards
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Timing standard
+      - Description
+    * - ``V4L2_DV_BT_STD_CEA861``
+      - The timings follow the CEA-861 Digital TV Profile standard
+    * - ``V4L2_DV_BT_STD_DMT``
+      - The timings follow the VESA Discrete Monitor Timings standard
+    * - ``V4L2_DV_BT_STD_CVT``
+      - The timings follow the VESA Coordinated Video Timings standard
+    * - ``V4L2_DV_BT_STD_GTF``
+      - The timings follow the VESA Generalized Timings Formula standard
+    * - ``V4L2_DV_BT_STD_SDI``
+      - The timings follow the SDI Timings standard.
+	There are no horizontal syncs/porches at all in this format.
+	Total blanking timings must be set in hsync or vsync fields only.
+
+.. tabularcolumns:: |p{7.0cm}|p{10.5cm}|
+
+.. _dv-bt-flags:
+
+.. flat-table:: DV BT Timing flags
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Flag
+      - Description
+    * - ``V4L2_DV_FL_REDUCED_BLANKING``
+      - CVT/GTF specific: the timings use reduced blanking (CVT) or the
+	'Secondary GTF' curve (GTF). In both cases the horizontal and/or
+	vertical blanking intervals are reduced, allowing a higher
+	resolution over the same bandwidth. This is a read-only flag,
+	applications must not set this.
+    * - ``V4L2_DV_FL_CAN_REDUCE_FPS``
+      - CEA-861 specific: set for CEA-861 formats with a framerate that is
+	a multiple of six. These formats can be optionally played at 1 /
+	1.001 speed to be compatible with 60 Hz based standards such as
+	NTSC and PAL-M that use a framerate of 29.97 frames per second. If
+	the transmitter can't generate such frequencies, then the flag
+	will also be cleared. This is a read-only flag, applications must
+	not set this.
+    * - ``V4L2_DV_FL_REDUCED_FPS``
+      - CEA-861 specific: only valid for video transmitters or video
+        receivers that have the ``V4L2_DV_FL_CAN_DETECT_REDUCED_FPS``
+	set. This flag is cleared otherwise. It is also only valid for
+	formats with the ``V4L2_DV_FL_CAN_REDUCE_FPS`` flag set, for other
+	formats the flag will be cleared by the driver.
+
+	If the application sets this flag for a transmitter, then the
+	pixelclock used to set up the transmitter is divided by 1.001 to
+	make it compatible with NTSC framerates. If the transmitter can't
+	generate such frequencies, then the flag will be cleared.
+
+	If a video receiver detects that the format uses a reduced framerate,
+	then it will set this flag to signal this to the application.
+    * - ``V4L2_DV_FL_HALF_LINE``
+      - Specific to interlaced formats: if set, then the vertical
+	frontporch of field 1 (aka the odd field) is really one half-line
+	longer and the vertical backporch of field 2 (aka the even field)
+	is really one half-line shorter, so each field has exactly the
+	same number of half-lines. Whether half-lines can be detected or
+	used depends on the hardware.
+    * - ``V4L2_DV_FL_IS_CE_VIDEO``
+      - If set, then this is a Consumer Electronics (CE) video format.
+	Such formats differ from other formats (commonly called IT
+	formats) in that if R'G'B' encoding is used then by default the
+	R'G'B' values use limited range (i.e. 16-235) as opposed to full
+	range (i.e. 0-255). All formats defined in CEA-861 except for the
+	640x480p59.94 format are CE formats.
+    * - ``V4L2_DV_FL_FIRST_FIELD_EXTRA_LINE``
+      - Some formats like SMPTE-125M have an interlaced signal with a odd
+	total height. For these formats, if this flag is set, the first
+	field has the extra line. Else, it is the second field.
+    * - ``V4L2_DV_FL_HAS_PICTURE_ASPECT``
+      - If set, then the picture_aspect field is valid. Otherwise assume that
+        the pixels are square, so the picture aspect ratio is the same as the
+	width to height ratio.
+    * - ``V4L2_DV_FL_HAS_CEA861_VIC``
+      - If set, then the cea861_vic field is valid and contains the Video
+        Identification Code as per the CEA-861 standard.
+    * - ``V4L2_DV_FL_HAS_HDMI_VIC``
+      - If set, then the hdmi_vic field is valid and contains the Video
+        Identification Code as per the HDMI standard (HDMI Vendor Specific
+	InfoFrame).
+    * - ``V4L2_DV_FL_CAN_DETECT_REDUCED_FPS``
+      - CEA-861 specific: only valid for video receivers, the flag is
+        cleared by transmitters.
+        If set, then the hardware can detect the difference between
+	regular framerates and framerates reduced by 1000/1001. E.g.:
+	60 vs 59.94 Hz, 30 vs 29.97 Hz or 24 vs 23.976 Hz.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-edid.rst b/Documentation/userspace-api/media/v4l/vidioc-g-edid.rst
new file mode 100644
index 000000000..39d523a44
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-edid.rst
@@ -0,0 +1,146 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_EDID:
+
+******************************************************************************
+ioctl VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID
+******************************************************************************
+
+Name
+====
+
+VIDIOC_G_EDID - VIDIOC_S_EDID - VIDIOC_SUBDEV_G_EDID - VIDIOC_SUBDEV_S_EDID - Get or set the EDID of a video receiver/transmitter
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_EDID
+
+``int ioctl(int fd, VIDIOC_G_EDID, struct v4l2_edid *argp)``
+
+.. c:macro:: VIDIOC_S_EDID
+
+``int ioctl(int fd, VIDIOC_S_EDID, struct v4l2_edid *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_G_EDID
+
+``int ioctl(int fd, VIDIOC_SUBDEV_G_EDID, struct v4l2_edid *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_S_EDID
+
+``int ioctl(int fd, VIDIOC_SUBDEV_S_EDID, struct v4l2_edid *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+   Pointer to struct :c:type:`v4l2_edid`.
+
+Description
+===========
+
+These ioctls can be used to get or set an EDID associated with an input
+from a receiver or an output of a transmitter device. They can be used
+with subdevice nodes (/dev/v4l-subdevX) or with video nodes
+(/dev/videoX).
+
+When used with video nodes the ``pad`` field represents the input (for
+video capture devices) or output (for video output devices) index as is
+returned by :ref:`VIDIOC_ENUMINPUT` and
+:ref:`VIDIOC_ENUMOUTPUT` respectively. When used
+with subdevice nodes the ``pad`` field represents the input or output
+pad of the subdevice. If there is no EDID support for the given ``pad``
+value, then the ``EINVAL`` error code will be returned.
+
+To get the EDID data the application has to fill in the ``pad``,
+``start_block``, ``blocks`` and ``edid`` fields, zero the ``reserved``
+array and call :ref:`VIDIOC_G_EDID <VIDIOC_G_EDID>`. The current EDID from block
+``start_block`` and of size ``blocks`` will be placed in the memory
+``edid`` points to. The ``edid`` pointer must point to memory at least
+``blocks`` * 128 bytes large (the size of one block is 128 bytes).
+
+If there are fewer blocks than specified, then the driver will set
+``blocks`` to the actual number of blocks. If there are no EDID blocks
+available at all, then the error code ``ENODATA`` is set.
+
+If blocks have to be retrieved from the sink, then this call will block
+until they have been read.
+
+If ``start_block`` and ``blocks`` are both set to 0 when
+:ref:`VIDIOC_G_EDID <VIDIOC_G_EDID>` is called, then the driver will set ``blocks`` to the
+total number of available EDID blocks and it will return 0 without
+copying any data. This is an easy way to discover how many EDID blocks
+there are.
+
+.. note::
+
+   If there are no EDID blocks available at all, then
+   the driver will set ``blocks`` to 0 and it returns 0.
+
+To set the EDID blocks of a receiver the application has to fill in the
+``pad``, ``blocks`` and ``edid`` fields, set ``start_block`` to 0 and
+zero the ``reserved`` array. It is not possible to set part of an EDID,
+it is always all or nothing. Setting the EDID data is only valid for
+receivers as it makes no sense for a transmitter.
+
+The driver assumes that the full EDID is passed in. If there are more
+EDID blocks than the hardware can handle then the EDID is not written,
+but instead the error code ``E2BIG`` is set and ``blocks`` is set to the
+maximum that the hardware supports. If ``start_block`` is any value
+other than 0 then the error code ``EINVAL`` is set.
+
+To disable an EDID you set ``blocks`` to 0. Depending on the hardware
+this will drive the hotplug pin low and/or block the source from reading
+the EDID data in some way. In any case, the end result is the same: the
+EDID is no longer available.
+
+.. c:type:: v4l2_edid
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_edid
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``pad``
+      - Pad for which to get/set the EDID blocks. When used with a video
+	device node the pad represents the input or output index as
+	returned by :ref:`VIDIOC_ENUMINPUT` and
+	:ref:`VIDIOC_ENUMOUTPUT` respectively.
+    * - __u32
+      - ``start_block``
+      - Read the EDID from starting with this block. Must be 0 when
+	setting the EDID.
+    * - __u32
+      - ``blocks``
+      - The number of blocks to get or set. Must be less or equal to 256
+	(the maximum number of blocks as defined by the standard). When
+	you set the EDID and ``blocks`` is 0, then the EDID is disabled or
+	erased.
+    * - __u32
+      - ``reserved``\ [5]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+    * - __u8 *
+      - ``edid``
+      - Pointer to memory that contains the EDID. The minimum size is
+	``blocks`` * 128.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+``ENODATA``
+    The EDID data is not available.
+
+``E2BIG``
+    The EDID data you provided is more than the hardware can handle.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-enc-index.rst b/Documentation/userspace-api/media/v4l/vidioc-g-enc-index.rst
new file mode 100644
index 000000000..7698e65cc
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-enc-index.rst
@@ -0,0 +1,144 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_ENC_INDEX:
+
+************************
+ioctl VIDIOC_G_ENC_INDEX
+************************
+
+Name
+====
+
+VIDIOC_G_ENC_INDEX - Get meta data about a compressed video stream
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_ENC_INDEX
+
+``int ioctl(int fd, VIDIOC_G_ENC_INDEX, struct v4l2_enc_idx *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_enc_idx`.
+
+Description
+===========
+
+The :ref:`VIDIOC_G_ENC_INDEX <VIDIOC_G_ENC_INDEX>` ioctl provides meta data about a compressed
+video stream the same or another application currently reads from the
+driver, which is useful for random access into the stream without
+decoding it.
+
+To read the data applications must call :ref:`VIDIOC_G_ENC_INDEX <VIDIOC_G_ENC_INDEX>` with a
+pointer to a struct :c:type:`v4l2_enc_idx`. On success
+the driver fills the ``entry`` array, stores the number of elements
+written in the ``entries`` field, and initializes the ``entries_cap``
+field.
+
+Each element of the ``entry`` array contains meta data about one
+picture. A :ref:`VIDIOC_G_ENC_INDEX <VIDIOC_G_ENC_INDEX>` call reads up to
+``V4L2_ENC_IDX_ENTRIES`` entries from a driver buffer, which can hold up
+to ``entries_cap`` entries. This number can be lower or higher than
+``V4L2_ENC_IDX_ENTRIES``, but not zero. When the application fails to
+read the meta data in time the oldest entries will be lost. When the
+buffer is empty or no capturing/encoding is in progress, ``entries``
+will be zero.
+
+Currently this ioctl is only defined for MPEG-2 program streams and
+video elementary streams.
+
+.. tabularcolumns:: |p{3.8cm}|p{5.6cm}|p{8.1cm}|
+
+.. c:type:: v4l2_enc_idx
+
+.. flat-table:: struct v4l2_enc_idx
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 3 8
+
+    * - __u32
+      - ``entries``
+      - The number of entries the driver stored in the ``entry`` array.
+    * - __u32
+      - ``entries_cap``
+      - The number of entries the driver can buffer. Must be greater than
+	zero.
+    * - __u32
+      - ``reserved``\ [4]
+      - Reserved for future extensions. Drivers must set the
+	array to zero.
+    * - struct :c:type:`v4l2_enc_idx_entry`
+      - ``entry``\ [``V4L2_ENC_IDX_ENTRIES``]
+      - Meta data about a compressed video stream. Each element of the
+	array corresponds to one picture, sorted in ascending order by
+	their ``offset``.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_enc_idx_entry
+
+.. flat-table:: struct v4l2_enc_idx_entry
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u64
+      - ``offset``
+      - The offset in bytes from the beginning of the compressed video
+	stream to the beginning of this picture, that is a *PES packet
+	header* as defined in :ref:`mpeg2part1` or a *picture header* as
+	defined in :ref:`mpeg2part2`. When the encoder is stopped, the
+	driver resets the offset to zero.
+    * - __u64
+      - ``pts``
+      - The 33 bit *Presentation Time Stamp* of this picture as defined in
+	:ref:`mpeg2part1`.
+    * - __u32
+      - ``length``
+      - The length of this picture in bytes.
+    * - __u32
+      - ``flags``
+      - Flags containing the coding type of this picture, see
+	:ref:`enc-idx-flags`.
+    * - __u32
+      - ``reserved``\ [2]
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _enc-idx-flags:
+
+.. flat-table:: Index Entry Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_ENC_IDX_FRAME_I``
+      - 0x00
+      - This is an Intra-coded picture.
+    * - ``V4L2_ENC_IDX_FRAME_P``
+      - 0x01
+      - This is a Predictive-coded picture.
+    * - ``V4L2_ENC_IDX_FRAME_B``
+      - 0x02
+      - This is a Bidirectionally predictive-coded picture.
+    * - ``V4L2_ENC_IDX_FRAME_MASK``
+      - 0x0F
+      - *AND* the flags field with this mask to obtain the picture coding
+	type.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
new file mode 100644
index 000000000..f2173e310
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
@@ -0,0 +1,404 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_EXT_CTRLS:
+
+******************************************************************
+ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS
+******************************************************************
+
+Name
+====
+
+VIDIOC_G_EXT_CTRLS - VIDIOC_S_EXT_CTRLS - VIDIOC_TRY_EXT_CTRLS - Get or set the value of several controls, try control values
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_EXT_CTRLS
+
+``int ioctl(int fd, VIDIOC_G_EXT_CTRLS, struct v4l2_ext_controls *argp)``
+
+.. c:macro:: VIDIOC_S_EXT_CTRLS
+
+``int ioctl(int fd, VIDIOC_S_EXT_CTRLS, struct v4l2_ext_controls *argp)``
+
+.. c:macro:: VIDIOC_TRY_EXT_CTRLS
+
+``int ioctl(int fd, VIDIOC_TRY_EXT_CTRLS, struct v4l2_ext_controls *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_ext_controls`.
+
+Description
+===========
+
+These ioctls allow the caller to get or set multiple controls
+atomically. Control IDs are grouped into control classes (see
+:ref:`ctrl-class`) and all controls in the control array must belong
+to the same control class.
+
+Applications must always fill in the ``count``, ``which``, ``controls``
+and ``reserved`` fields of struct
+:c:type:`v4l2_ext_controls`, and initialize the
+struct :c:type:`v4l2_ext_control` array pointed to
+by the ``controls`` fields.
+
+To get the current value of a set of controls applications initialize
+the ``id``, ``size`` and ``reserved2`` fields of each struct
+:c:type:`v4l2_ext_control` and call the
+:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. String controls controls must also set the
+``string`` field. Controls of compound types
+(``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is set) must set the ``ptr`` field.
+
+If the ``size`` is too small to receive the control result (only
+relevant for pointer-type controls like strings), then the driver will
+set ``size`` to a valid value and return an ``ENOSPC`` error code. You
+should re-allocate the memory to this new size and try again. For the
+string type it is possible that the same issue occurs again if the
+string has grown in the meantime. It is recommended to call
+:ref:`VIDIOC_QUERYCTRL` first and use
+``maximum``\ +1 as the new ``size`` value. It is guaranteed that that is
+sufficient memory.
+
+N-dimensional arrays are set and retrieved row-by-row. You cannot set a
+partial array, all elements have to be set or retrieved. The total size
+is calculated as ``elems`` * ``elem_size``. These values can be obtained
+by calling :ref:`VIDIOC_QUERY_EXT_CTRL <VIDIOC_QUERYCTRL>`.
+
+To change the value of a set of controls applications initialize the
+``id``, ``size``, ``reserved2`` and ``value/value64/string/ptr`` fields
+of each struct :c:type:`v4l2_ext_control` and call
+the :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. The controls will only be set if *all*
+control values are valid.
+
+To check if a set of controls have correct values applications
+initialize the ``id``, ``size``, ``reserved2`` and
+``value/value64/string/ptr`` fields of each struct
+:c:type:`v4l2_ext_control` and call the
+:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. It is up to the driver whether wrong
+values are automatically adjusted to a valid value or if an error is
+returned.
+
+When the ``id`` or ``which`` is invalid drivers return an ``EINVAL`` error
+code. When the value is out of bounds drivers can choose to take the
+closest valid value or return an ``ERANGE`` error code, whatever seems more
+appropriate. In the first case the new value is set in struct
+:c:type:`v4l2_ext_control`. If the new control value
+is inappropriate (e.g. the given menu index is not supported by the menu
+control), then this will also result in an ``EINVAL`` error code error.
+
+If ``request_fd`` is set to a not-yet-queued :ref:`request <media-request-api>`
+file descriptor and ``which`` is set to ``V4L2_CTRL_WHICH_REQUEST_VAL``,
+then the controls are not applied immediately when calling
+:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, but instead are applied by
+the driver for the buffer associated with the same request.
+If the device does not support requests, then ``EACCES`` will be returned.
+If requests are supported but an invalid request file descriptor is given,
+then ``EINVAL`` will be returned.
+
+An attempt to call :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` for a
+request that has already been queued will result in an ``EBUSY`` error.
+
+If ``request_fd`` is specified and ``which`` is set to
+``V4L2_CTRL_WHICH_REQUEST_VAL`` during a call to
+:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, then it will return the
+values of the controls at the time of request completion.
+If the request is not yet completed, then this will result in an
+``EACCES`` error.
+
+The driver will only set/get these controls if all control values are
+correct. This prevents the situation where only some of the controls
+were set/get. Only low-level errors (e. g. a failed i2c command) can
+still cause this situation.
+
+.. tabularcolumns:: |p{1.2cm}|p{3.0cm}|p{1.5cm}|p{11.8cm}|
+
+.. c:type:: v4l2_ext_control
+
+.. cssclass: longtable
+
+.. flat-table:: struct v4l2_ext_control
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``id``
+      - Identifies the control, set by the application.
+    * - __u32
+      - ``size``
+      - The total size in bytes of the payload of this control. This is
+	normally 0, but for pointer controls this should be set to the
+	size of the memory containing the payload, or that will receive
+	the payload. If :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` finds that this value is
+	less than is required to store the payload result, then it is set
+	to a value large enough to store the payload result and ``ENOSPC`` is
+	returned.
+
+	.. note::
+
+	   For string controls, this ``size`` field should
+	   not be confused with the length of the string. This field refers
+	   to the size of the memory that contains the string. The actual
+	   *length* of the string may well be much smaller.
+    * - __u32
+      - ``reserved2``\ [1]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+    * - union {
+      - (anonymous)
+    * - __s32
+      - ``value``
+      - New value or current value. Valid if this control is not of type
+	``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is
+	not set.
+    * - __s64
+      - ``value64``
+      - New value or current value. Valid if this control is of type
+	``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is
+	not set.
+    * - char *
+      - ``string``
+      - A pointer to a string. Valid if this control is of type
+	``V4L2_CTRL_TYPE_STRING``.
+    * - __u8 *
+      - ``p_u8``
+      - A pointer to a matrix control of unsigned 8-bit values. Valid if
+	this control is of type ``V4L2_CTRL_TYPE_U8``.
+    * - __u16 *
+      - ``p_u16``
+      - A pointer to a matrix control of unsigned 16-bit values. Valid if
+	this control is of type ``V4L2_CTRL_TYPE_U16``.
+    * - __u32 *
+      - ``p_u32``
+      - A pointer to a matrix control of unsigned 32-bit values. Valid if
+	this control is of type ``V4L2_CTRL_TYPE_U32``.
+    * - :c:type:`v4l2_area` *
+      - ``p_area``
+      - A pointer to a struct :c:type:`v4l2_area`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_AREA``.
+    * - void *
+      - ``ptr``
+      - A pointer to a compound type which can be an N-dimensional array
+	and/or a compound type (the control's type is >=
+	``V4L2_CTRL_COMPOUND_TYPES``). Valid if
+	``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is set for this control.
+    * - }
+      -
+
+.. tabularcolumns:: |p{4.0cm}|p{2.2cm}|p{2.1cm}|p{8.2cm}|
+
+.. c:type:: v4l2_ext_controls
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ext_controls
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - union {
+      - (anonymous)
+    * - __u32
+      - ``ctrl_class``
+      - The control class to which all controls belong, see
+	:ref:`ctrl-class`. Drivers that use a kernel framework for
+	handling controls will also accept a value of 0 here, meaning that
+	the controls can belong to any control class. Whether drivers
+	support this can be tested by setting ``ctrl_class`` to 0 and
+	calling :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` with a ``count`` of 0. If that
+	succeeds, then the driver supports this feature.
+    * - __u32
+      - ``which``
+      - Which value of the control to get/set/try.
+	``V4L2_CTRL_WHICH_CUR_VAL`` will return the current value of the
+	control, ``V4L2_CTRL_WHICH_DEF_VAL`` will return the default
+	value of the control and ``V4L2_CTRL_WHICH_REQUEST_VAL`` indicates that
+	these controls have to be retrieved from a request or tried/set for
+	a request. In the latter case the ``request_fd`` field contains the
+	file descriptor of the request that should be used. If the device
+	does not support requests, then ``EACCES`` will be returned.
+
+	.. note::
+
+	   When using ``V4L2_CTRL_WHICH_DEF_VAL`` be aware that you can only
+	   get the default value of the control, you cannot set or try it.
+
+	For backwards compatibility you can also use a control class here
+	(see :ref:`ctrl-class`). In that case all controls have to
+	belong to that control class. This usage is deprecated, instead
+	just use ``V4L2_CTRL_WHICH_CUR_VAL``. There are some very old
+	drivers that do not yet support ``V4L2_CTRL_WHICH_CUR_VAL`` and
+	that require a control class here. You can test for such drivers
+	by setting ctrl_class to ``V4L2_CTRL_WHICH_CUR_VAL`` and calling
+	VIDIOC_TRY_EXT_CTRLS with a count of 0. If that fails, then the
+	driver does not support ``V4L2_CTRL_WHICH_CUR_VAL``.
+    * - }
+      -
+    * - __u32
+      - ``count``
+      - The number of controls in the controls array. May also be zero.
+    * - __u32
+      - ``error_idx``
+      - Set by the driver in case of an error. If the error is associated
+	with a particular control, then ``error_idx`` is set to the index
+	of that control. If the error is not related to a specific
+	control, or the validation step failed (see below), then
+	``error_idx`` is set to ``count``. The value is undefined if the
+	ioctl returned 0 (success).
+
+	Before controls are read from/written to hardware a validation
+	step takes place: this checks if all controls in the list are
+	valid controls, if no attempt is made to write to a read-only
+	control or read from a write-only control, and any other up-front
+	checks that can be done without accessing the hardware. The exact
+	validations done during this step are driver dependent since some
+	checks might require hardware access for some devices, thus making
+	it impossible to do those checks up-front. However, drivers should
+	make a best-effort to do as many up-front checks as possible.
+
+	This check is done to avoid leaving the hardware in an
+	inconsistent state due to easy-to-avoid problems. But it leads to
+	another problem: the application needs to know whether an error
+	came from the validation step (meaning that the hardware was not
+	touched) or from an error during the actual reading from/writing
+	to hardware.
+
+	The, in hindsight quite poor, solution for that is to set
+	``error_idx`` to ``count`` if the validation failed. This has the
+	unfortunate side-effect that it is not possible to see which
+	control failed the validation. If the validation was successful
+	and the error happened while accessing the hardware, then
+	``error_idx`` is less than ``count`` and only the controls up to
+	``error_idx-1`` were read or written correctly, and the state of
+	the remaining controls is undefined.
+
+	Since :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` does not access hardware there is
+	also no need to handle the validation step in this special way, so
+	``error_idx`` will just be set to the control that failed the
+	validation step instead of to ``count``. This means that if
+	:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` fails with ``error_idx`` set to ``count``,
+	then you can call :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` to try to discover the
+	actual control that failed the validation step. Unfortunately,
+	there is no ``TRY`` equivalent for :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`.
+    * - __s32
+      - ``request_fd``
+      - File descriptor of the request to be used by this operation. Only
+	valid if ``which`` is set to ``V4L2_CTRL_WHICH_REQUEST_VAL``.
+	If the device does not support requests, then ``EACCES`` will be returned.
+	If requests are supported but an invalid request file descriptor is
+	given, then ``EINVAL`` will be returned.
+    * - __u32
+      - ``reserved``\ [1]
+      - Reserved for future extensions.
+
+	Drivers and applications must set the array to zero.
+    * - struct :c:type:`v4l2_ext_control` *
+      - ``controls``
+      - Pointer to an array of ``count`` v4l2_ext_control structures.
+
+	Ignored if ``count`` equals zero.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _ctrl-class:
+
+.. flat-table:: Control classes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_CTRL_CLASS_USER``
+      - 0x980000
+      - The class containing user controls. These controls are described
+	in :ref:`control`. All controls that can be set using the
+	:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` and
+	:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` ioctl belong to this
+	class.
+    * - ``V4L2_CTRL_CLASS_MPEG``
+      - 0x990000
+      - The class containing MPEG compression controls. These controls are
+	described in :ref:`mpeg-controls`.
+    * - ``V4L2_CTRL_CLASS_CAMERA``
+      - 0x9a0000
+      - The class containing camera controls. These controls are described
+	in :ref:`camera-controls`.
+    * - ``V4L2_CTRL_CLASS_FM_TX``
+      - 0x9b0000
+      - The class containing FM Transmitter (FM TX) controls. These
+	controls are described in :ref:`fm-tx-controls`.
+    * - ``V4L2_CTRL_CLASS_FLASH``
+      - 0x9c0000
+      - The class containing flash device controls. These controls are
+	described in :ref:`flash-controls`.
+    * - ``V4L2_CTRL_CLASS_JPEG``
+      - 0x9d0000
+      - The class containing JPEG compression controls. These controls are
+	described in :ref:`jpeg-controls`.
+    * - ``V4L2_CTRL_CLASS_IMAGE_SOURCE``
+      - 0x9e0000
+      - The class containing image source controls. These controls are
+	described in :ref:`image-source-controls`.
+    * - ``V4L2_CTRL_CLASS_IMAGE_PROC``
+      - 0x9f0000
+      - The class containing image processing controls. These controls are
+	described in :ref:`image-process-controls`.
+    * - ``V4L2_CTRL_CLASS_FM_RX``
+      - 0xa10000
+      - The class containing FM Receiver (FM RX) controls. These controls
+	are described in :ref:`fm-rx-controls`.
+    * - ``V4L2_CTRL_CLASS_RF_TUNER``
+      - 0xa20000
+      - The class containing RF tuner controls. These controls are
+	described in :ref:`rf-tuner-controls`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_ext_control` ``id`` is
+    invalid, or the struct :c:type:`v4l2_ext_controls`
+    ``which`` is invalid, or the struct
+    :c:type:`v4l2_ext_control` ``value`` was
+    inappropriate (e.g. the given menu index is not supported by the
+    driver), or the ``which`` field was set to ``V4L2_CTRL_WHICH_REQUEST_VAL``
+    but the given ``request_fd`` was invalid or ``V4L2_CTRL_WHICH_REQUEST_VAL``
+    is not supported by the kernel.
+    This error code is also returned by the
+    :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctls if two or
+    more control values are in conflict.
+
+ERANGE
+    The struct :c:type:`v4l2_ext_control` ``value``
+    is out of bounds.
+
+EBUSY
+    The control is temporarily not changeable, possibly because another
+    applications took over control of the device function this control
+    belongs to, or (if the ``which`` field was set to
+    ``V4L2_CTRL_WHICH_REQUEST_VAL``) the request was queued but not yet
+    completed.
+
+ENOSPC
+    The space reserved for the control's payload is insufficient. The
+    field ``size`` is set to a value that is enough to store the payload
+    and this error code is returned.
+
+EACCES
+    Attempt to try or set a read-only control, or to get a write-only
+    control, or to get a control from a request that has not yet been
+    completed.
+
+    Or the ``which`` field was set to ``V4L2_CTRL_WHICH_REQUEST_VAL`` but the
+    device does not support requests.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-fbuf.rst b/Documentation/userspace-api/media/v4l/vidioc-g-fbuf.rst
new file mode 100644
index 000000000..dc1f16343
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-fbuf.rst
@@ -0,0 +1,351 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_FBUF:
+
+**********************************
+ioctl VIDIOC_G_FBUF, VIDIOC_S_FBUF
+**********************************
+
+Name
+====
+
+VIDIOC_G_FBUF - VIDIOC_S_FBUF - Get or set frame buffer overlay parameters
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_FBUF
+
+``int ioctl(int fd, VIDIOC_G_FBUF, struct v4l2_framebuffer *argp)``
+
+.. c:macro:: VIDIOC_S_FBUF
+
+``int ioctl(int fd, VIDIOC_S_FBUF, const struct v4l2_framebuffer *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_framebuffer`.
+
+Description
+===========
+
+Applications can use the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` and :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctl
+to get and set the framebuffer parameters for a
+:ref:`Video Overlay <overlay>` or :ref:`Video Output Overlay <osd>`
+(OSD). The type of overlay is implied by the device type (capture or
+output device) and can be determined with the
+:ref:`VIDIOC_QUERYCAP` ioctl. One ``/dev/videoN``
+device must not support both kinds of overlay.
+
+The V4L2 API distinguishes destructive and non-destructive overlays. A
+destructive overlay copies captured video images into the video memory
+of a graphics card. A non-destructive overlay blends video images into a
+VGA signal or graphics into a video signal. *Video Output Overlays* are
+always non-destructive.
+
+To get the current parameters applications call the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`
+ioctl with a pointer to a struct :c:type:`v4l2_framebuffer`
+structure. The driver fills all fields of the structure or returns an
+EINVAL error code when overlays are not supported.
+
+To set the parameters for a *Video Output Overlay*, applications must
+initialize the ``flags`` field of a struct
+:c:type:`v4l2_framebuffer`. Since the framebuffer is
+implemented on the TV card all other parameters are determined by the
+driver. When an application calls :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` with a pointer to
+this structure, the driver prepares for the overlay and returns the
+framebuffer parameters as :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` does, or it returns an error
+code.
+
+To set the parameters for a *non-destructive Video Overlay*,
+applications must initialize the ``flags`` field, the ``fmt``
+substructure, and call :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`. Again the driver prepares for
+the overlay and returns the framebuffer parameters as :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`
+does, or it returns an error code.
+
+For a *destructive Video Overlay* applications must additionally provide
+a ``base`` address. Setting up a DMA to a random memory location can
+jeopardize the system security, its stability or even damage the
+hardware, therefore only the superuser can set the parameters for a
+destructive video overlay.
+
+.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}|
+
+.. c:type:: v4l2_framebuffer
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_framebuffer
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 1 2
+
+    * - __u32
+      - ``capability``
+      -
+      - Overlay capability flags set by the driver, see
+	:ref:`framebuffer-cap`.
+    * - __u32
+      - ``flags``
+      -
+      - Overlay control flags set by application and driver, see
+	:ref:`framebuffer-flags`
+    * - void *
+      - ``base``
+      -
+      - Physical base address of the framebuffer, that is the address of
+	the pixel in the top left corner of the framebuffer. [#f1]_
+    * -
+      -
+      -
+      - This field is irrelevant to *non-destructive Video Overlays*. For
+	*destructive Video Overlays* applications must provide a base
+	address. The driver may accept only base addresses which are a
+	multiple of two, four or eight bytes. For *Video Output Overlays*
+	the driver must return a valid base address, so applications can
+	find the corresponding Linux framebuffer device (see
+	:ref:`osd`).
+    * - struct
+      - ``fmt``
+      -
+      - Layout of the frame buffer.
+    * -
+      - __u32
+      - ``width``
+      - Width of the frame buffer in pixels.
+    * -
+      - __u32
+      - ``height``
+      - Height of the frame buffer in pixels.
+    * -
+      - __u32
+      - ``pixelformat``
+      - The pixel format of the framebuffer.
+    * -
+      -
+      -
+      - For *non-destructive Video Overlays* this field only defines a
+	format for the struct :c:type:`v4l2_window`
+	``chromakey`` field.
+    * -
+      -
+      -
+      - For *destructive Video Overlays* applications must initialize this
+	field. For *Video Output Overlays* the driver must return a valid
+	format.
+    * -
+      -
+      -
+      - Usually this is an RGB format (for example
+	:ref:`V4L2_PIX_FMT_RGB565 <V4L2-PIX-FMT-RGB565>`) but YUV
+	formats (only packed YUV formats when chroma keying is used, not
+	including ``V4L2_PIX_FMT_YUYV`` and ``V4L2_PIX_FMT_UYVY``) and the
+	``V4L2_PIX_FMT_PAL8`` format are also permitted. The behavior of
+	the driver when an application requests a compressed format is
+	undefined. See :ref:`pixfmt` for information on pixel formats.
+    * -
+      - enum :c:type:`v4l2_field`
+      - ``field``
+      - Drivers and applications shall ignore this field. If applicable,
+	the field order is selected with the
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, using the ``field``
+	field of struct :c:type:`v4l2_window`.
+    * -
+      - __u32
+      - ``bytesperline``
+      - Distance in bytes between the leftmost pixels in two adjacent
+	lines.
+    * - :cspan:`3`
+
+	This field is irrelevant to *non-destructive Video Overlays*.
+
+	For *destructive Video Overlays* both applications and drivers can
+	set this field to request padding bytes at the end of each line.
+	Drivers however may ignore the requested value, returning
+	``width`` times bytes-per-pixel or a larger value required by the
+	hardware. That implies applications can just set this field to
+	zero to get a reasonable default.
+
+	For *Video Output Overlays* the driver must return a valid value.
+
+	Video hardware may access padding bytes, therefore they must
+	reside in accessible memory. Consider for example the case where
+	padding bytes after the last line of an image cross a system page
+	boundary. Capture devices may write padding bytes, the value is
+	undefined. Output devices ignore the contents of padding bytes.
+
+	When the image format is planar the ``bytesperline`` value applies
+	to the first plane and is divided by the same factor as the
+	``width`` field for the other planes. For example the Cb and Cr
+	planes of a YUV 4:2:0 image have half as many padding bytes
+	following each line as the Y plane. To avoid ambiguities drivers
+	must return a ``bytesperline`` value rounded up to a multiple of
+	the scale factor.
+    * -
+      - __u32
+      - ``sizeimage``
+      - This field is irrelevant to *non-destructive Video Overlays*. For
+	*destructive Video Overlays* applications must initialize this
+	field. For *Video Output Overlays* the driver must return a valid
+	format.
+
+	Together with ``base`` it defines the framebuffer memory
+	accessible by the driver.
+    * -
+      - enum :c:type:`v4l2_colorspace`
+      - ``colorspace``
+      - This information supplements the ``pixelformat`` and must be set
+	by the driver, see :ref:`colorspaces`.
+    * -
+      - __u32
+      - ``priv``
+      - Reserved. Drivers and applications must set this field to zero.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _framebuffer-cap:
+
+.. flat-table:: Frame Buffer Capability Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_FBUF_CAP_EXTERNOVERLAY``
+      - 0x0001
+      - The device is capable of non-destructive overlays. When the driver
+	clears this flag, only destructive overlays are supported. There
+	are no drivers yet which support both destructive and
+	non-destructive overlays. Video Output Overlays are in practice
+	always non-destructive.
+    * - ``V4L2_FBUF_CAP_CHROMAKEY``
+      - 0x0002
+      - The device supports clipping by chroma-keying the images. That is,
+	image pixels replace pixels in the VGA or video signal only where
+	the latter assume a certain color. Chroma-keying makes no sense
+	for destructive overlays.
+    * - ``V4L2_FBUF_CAP_LIST_CLIPPING``
+      - 0x0004
+      - The device supports clipping using a list of clip rectangles.
+    * - ``V4L2_FBUF_CAP_BITMAP_CLIPPING``
+      - 0x0008
+      - The device supports clipping using a bit mask.
+    * - ``V4L2_FBUF_CAP_LOCAL_ALPHA``
+      - 0x0010
+      - The device supports clipping/blending using the alpha channel of
+	the framebuffer or VGA signal. Alpha blending makes no sense for
+	destructive overlays.
+    * - ``V4L2_FBUF_CAP_GLOBAL_ALPHA``
+      - 0x0020
+      - The device supports alpha blending using a global alpha value.
+	Alpha blending makes no sense for destructive overlays.
+    * - ``V4L2_FBUF_CAP_LOCAL_INV_ALPHA``
+      - 0x0040
+      - The device supports clipping/blending using the inverted alpha
+	channel of the framebuffer or VGA signal. Alpha blending makes no
+	sense for destructive overlays.
+    * - ``V4L2_FBUF_CAP_SRC_CHROMAKEY``
+      - 0x0080
+      - The device supports Source Chroma-keying. Video pixels with the
+	chroma-key colors are replaced by framebuffer pixels, which is
+	exactly opposite of ``V4L2_FBUF_CAP_CHROMAKEY``
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _framebuffer-flags:
+
+.. cssclass:: longtable
+
+.. flat-table:: Frame Buffer Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_FBUF_FLAG_PRIMARY``
+      - 0x0001
+      - The framebuffer is the primary graphics surface. In other words,
+	the overlay is destructive. This flag is typically set by any
+	driver that doesn't have the ``V4L2_FBUF_CAP_EXTERNOVERLAY``
+	capability and it is cleared otherwise.
+    * - ``V4L2_FBUF_FLAG_OVERLAY``
+      - 0x0002
+      - If this flag is set for a video capture device, then the driver
+	will set the initial overlay size to cover the full framebuffer
+	size, otherwise the existing overlay size (as set by
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`) will be used. Only one
+	video capture driver (bttv) supports this flag. The use of this
+	flag for capture devices is deprecated. There is no way to detect
+	which drivers support this flag, so the only reliable method of
+	setting the overlay size is through
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`. If this flag is set for a
+	video output device, then the video output overlay window is
+	relative to the top-left corner of the framebuffer and restricted
+	to the size of the framebuffer. If it is cleared, then the video
+	output overlay window is relative to the video output display.
+    * - ``V4L2_FBUF_FLAG_CHROMAKEY``
+      - 0x0004
+      - Use chroma-keying. The chroma-key color is determined by the
+	``chromakey`` field of struct :c:type:`v4l2_window`
+	and negotiated with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+	ioctl, see :ref:`overlay` and :ref:`osd`.
+    * - :cspan:`2` There are no flags to enable clipping using a list of
+	clip rectangles or a bitmap. These methods are negotiated with the
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, see :ref:`overlay`
+	and :ref:`osd`.
+    * - ``V4L2_FBUF_FLAG_LOCAL_ALPHA``
+      - 0x0008
+      - Use the alpha channel of the framebuffer to clip or blend
+	framebuffer pixels with video images. The blend function is:
+	output = framebuffer pixel * alpha + video pixel * (1 - alpha).
+	The actual alpha depth depends on the framebuffer pixel format.
+    * - ``V4L2_FBUF_FLAG_GLOBAL_ALPHA``
+      - 0x0010
+      - Use a global alpha value to blend the framebuffer with video
+	images. The blend function is: output = (framebuffer pixel * alpha
+	+ video pixel * (255 - alpha)) / 255. The alpha value is
+	determined by the ``global_alpha`` field of struct
+	:c:type:`v4l2_window` and negotiated with the
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, see :ref:`overlay`
+	and :ref:`osd`.
+    * - ``V4L2_FBUF_FLAG_LOCAL_INV_ALPHA``
+      - 0x0020
+      - Like ``V4L2_FBUF_FLAG_LOCAL_ALPHA``, use the alpha channel of the
+	framebuffer to clip or blend framebuffer pixels with video images,
+	but with an inverted alpha value. The blend function is: output =
+	framebuffer pixel * (1 - alpha) + video pixel * alpha. The actual
+	alpha depth depends on the framebuffer pixel format.
+    * - ``V4L2_FBUF_FLAG_SRC_CHROMAKEY``
+      - 0x0040
+      - Use source chroma-keying. The source chroma-key color is
+	determined by the ``chromakey`` field of struct
+	:c:type:`v4l2_window` and negotiated with the
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, see :ref:`overlay`
+	and :ref:`osd`. Both chroma-keying are mutual exclusive to each
+	other, so same ``chromakey`` field of struct
+	:c:type:`v4l2_window` is being used.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EPERM
+    :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` can only be called by a privileged user to
+    negotiate the parameters for a destructive overlay.
+
+EINVAL
+    The :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` parameters are unsuitable.
+
+.. [#f1]
+   A physical base address may not suit all platforms. GK notes in
+   theory we should pass something like PCI device + memory region +
+   offset instead. If you encounter problems please discuss on the
+   linux-media mailing list:
+   `https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-fmt.rst b/Documentation/userspace-api/media/v4l/vidioc-g-fmt.rst
new file mode 100644
index 000000000..7e9f8475e
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-fmt.rst
@@ -0,0 +1,154 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_FMT:
+
+************************************************
+ioctl VIDIOC_G_FMT, VIDIOC_S_FMT, VIDIOC_TRY_FMT
+************************************************
+
+Name
+====
+
+VIDIOC_G_FMT - VIDIOC_S_FMT - VIDIOC_TRY_FMT - Get or set the data format, try a format
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_FMT
+
+``int ioctl(int fd, VIDIOC_G_FMT, struct v4l2_format *argp)``
+
+.. c:macro:: VIDIOC_S_FMT
+
+``int ioctl(int fd, VIDIOC_S_FMT, struct v4l2_format *argp)``
+
+.. c:macro:: VIDIOC_TRY_FMT
+
+``int ioctl(int fd, VIDIOC_TRY_FMT, struct v4l2_format *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_format`.
+
+Description
+===========
+
+These ioctls are used to negotiate the format of data (typically image
+format) exchanged between driver and application.
+
+To query the current parameters applications set the ``type`` field of a
+struct :c:type:`v4l2_format` to the respective buffer (stream)
+type. For example video capture devices use
+``V4L2_BUF_TYPE_VIDEO_CAPTURE`` or
+``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``. When the application calls the
+:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl with a pointer to this structure the driver fills
+the respective member of the ``fmt`` union. In case of video capture
+devices that is either the struct
+:c:type:`v4l2_pix_format` ``pix`` or the struct
+:c:type:`v4l2_pix_format_mplane` ``pix_mp``
+member. When the requested buffer type is not supported drivers return
+an ``EINVAL`` error code.
+
+To change the current format parameters applications initialize the
+``type`` field and all fields of the respective ``fmt`` union member.
+For details see the documentation of the various devices types in
+:ref:`devices`. Good practice is to query the current parameters
+first, and to modify only those parameters not suitable for the
+application. When the application calls the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with
+a pointer to a struct :c:type:`v4l2_format` structure the driver
+checks and adjusts the parameters against hardware abilities. Drivers
+should not return an error code unless the ``type`` field is invalid,
+this is a mechanism to fathom device capabilities and to approach
+parameters acceptable for both the application and driver. On success
+the driver may program the hardware, allocate resources and generally
+prepare for data exchange. Finally the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl returns
+the current format parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. Very simple,
+inflexible devices may even ignore all input and always return the
+default parameters. However all V4L2 devices exchanging data with the
+application must implement the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`
+ioctl. When the requested buffer type is not supported drivers return an
+EINVAL error code on a :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` attempt. When I/O is already in
+progress or the resource is not available for other reasons drivers
+return the ``EBUSY`` error code.
+
+The :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl is equivalent to :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` with one
+exception: it does not change driver state. It can also be called at any
+time, never returning ``EBUSY``. This function is provided to negotiate
+parameters, to learn about hardware limitations, without disabling I/O
+or possibly time consuming hardware preparations. Although strongly
+recommended drivers are not required to implement this ioctl.
+
+The format as returned by :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` must be identical to what
+:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` returns for the same input or output.
+
+.. c:type:: v4l2_format
+
+.. tabularcolumns::  |p{1.2cm}|p{4.6cm}|p{3.0cm}|p{8.6cm}|
+
+.. flat-table:: struct v4l2_format
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - __u32
+      - ``type``
+      - Type of the data stream, see :c:type:`v4l2_buf_type`.
+    * - union {
+      - ``fmt``
+    * - struct :c:type:`v4l2_pix_format`
+      - ``pix``
+      - Definition of an image format, see :ref:`pixfmt`, used by video
+	capture and output devices.
+    * - struct :c:type:`v4l2_pix_format_mplane`
+      - ``pix_mp``
+      - Definition of an image format, see :ref:`pixfmt`, used by video
+	capture and output devices that support the
+	:ref:`multi-planar version of the API <planar-apis>`.
+    * - struct :c:type:`v4l2_window`
+      - ``win``
+      - Definition of an overlaid image, see :ref:`overlay`, used by
+	video overlay devices.
+    * - struct :c:type:`v4l2_vbi_format`
+      - ``vbi``
+      - Raw VBI capture or output parameters. This is discussed in more
+	detail in :ref:`raw-vbi`. Used by raw VBI capture and output
+	devices.
+    * - struct :c:type:`v4l2_sliced_vbi_format`
+      - ``sliced``
+      - Sliced VBI capture or output parameters. See :ref:`sliced` for
+	details. Used by sliced VBI capture and output devices.
+    * - struct :c:type:`v4l2_sdr_format`
+      - ``sdr``
+      - Definition of a data format, see :ref:`pixfmt`, used by SDR
+	capture and output devices.
+    * - struct :c:type:`v4l2_meta_format`
+      - ``meta``
+      - Definition of a metadata format, see :ref:`meta-formats`, used by
+	metadata capture devices.
+    * - __u8
+      - ``raw_data``\ [200]
+      - Place holder for future extensions.
+    * - }
+      -
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_format` ``type`` field is
+    invalid or the requested buffer type not supported.
+
+EBUSY
+    The device is busy and cannot change the format. This could be
+    because or the device is streaming or buffers are allocated or
+    queued to the driver. Relevant for :ref:`VIDIOC_S_FMT
+    <VIDIOC_G_FMT>` only.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-frequency.rst b/Documentation/userspace-api/media/v4l/vidioc-g-frequency.rst
new file mode 100644
index 000000000..5445a4a44
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-frequency.rst
@@ -0,0 +1,103 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_FREQUENCY:
+
+********************************************
+ioctl VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY
+********************************************
+
+Name
+====
+
+VIDIOC_G_FREQUENCY - VIDIOC_S_FREQUENCY - Get or set tuner or modulator radio frequency
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_FREQUENCY
+
+``int ioctl(int fd, VIDIOC_G_FREQUENCY, struct v4l2_frequency *argp)``
+
+.. c:macro:: VIDIOC_S_FREQUENCY
+
+``int ioctl(int fd, VIDIOC_S_FREQUENCY, const struct v4l2_frequency *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_frequency`.
+
+Description
+===========
+
+To get the current tuner or modulator radio frequency applications set
+the ``tuner`` field of a struct
+:c:type:`v4l2_frequency` to the respective tuner or
+modulator number (only input devices have tuners, only output devices
+have modulators), zero out the ``reserved`` array and call the
+:ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl with a pointer to this structure. The
+driver stores the current frequency in the ``frequency`` field.
+
+To change the current tuner or modulator radio frequency applications
+initialize the ``tuner``, ``type`` and ``frequency`` fields, and the
+``reserved`` array of a struct :c:type:`v4l2_frequency`
+and call the :ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl with a pointer to this
+structure. When the requested frequency is not possible the driver
+assumes the closest possible value. However :ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` is a
+write-only ioctl, it does not return the actual new frequency.
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_frequency
+
+.. flat-table:: struct v4l2_frequency
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``tuner``
+      - The tuner or modulator index number. This is the same value as in
+	the struct :c:type:`v4l2_input` ``tuner`` field and
+	the struct :c:type:`v4l2_tuner` ``index`` field, or
+	the struct :c:type:`v4l2_output` ``modulator`` field
+	and the struct :c:type:`v4l2_modulator` ``index``
+	field.
+    * - __u32
+      - ``type``
+      - The tuner type. This is the same value as in the struct
+	:c:type:`v4l2_tuner` ``type`` field. The type must be
+	set to ``V4L2_TUNER_RADIO`` for ``/dev/radioX`` device nodes, and
+	to ``V4L2_TUNER_ANALOG_TV`` for all others. Set this field to
+	``V4L2_TUNER_RADIO`` for modulators (currently only radio
+	modulators are supported). See :c:type:`v4l2_tuner_type`
+    * - __u32
+      - ``frequency``
+      - Tuning frequency in units of 62.5 kHz, or if the struct
+	:c:type:`v4l2_tuner` or struct
+	:c:type:`v4l2_modulator` ``capability`` flag
+	``V4L2_TUNER_CAP_LOW`` is set, in units of 62.5 Hz. A 1 Hz unit is
+	used when the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is set.
+    * - __u32
+      - ``reserved``\ [8]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The ``tuner`` index is out of bounds or the value in the ``type``
+    field is wrong.
+
+EBUSY
+    A hardware seek is in progress.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-input.rst b/Documentation/userspace-api/media/v4l/vidioc-g-input.rst
new file mode 100644
index 000000000..eee9ce51c
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-input.rst
@@ -0,0 +1,63 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_INPUT:
+
+************************************
+ioctl VIDIOC_G_INPUT, VIDIOC_S_INPUT
+************************************
+
+Name
+====
+
+VIDIOC_G_INPUT - VIDIOC_S_INPUT - Query or select the current video input
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_INPUT
+
+``int ioctl(int fd, VIDIOC_G_INPUT, int *argp)``
+
+.. c:macro:: VIDIOC_S_INPUT
+
+``int ioctl(int fd, VIDIOC_S_INPUT, int *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer an integer with input index.
+
+Description
+===========
+
+To query the current video input applications call the
+:ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` ioctl with a pointer to an integer where the driver
+stores the number of the input, as in the struct
+:c:type:`v4l2_input` ``index`` field. This ioctl will fail
+only when there are no video inputs, returning ``EINVAL``.
+
+To select a video input applications store the number of the desired
+input in an integer and call the :ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>` ioctl with a pointer
+to this integer. Side effects are possible. For example inputs may
+support different video standards, so the driver may implicitly switch
+the current standard. Because of these possible side effects
+applications must select an input before querying or negotiating any
+other parameters.
+
+Information about video inputs is available using the
+:ref:`VIDIOC_ENUMINPUT` ioctl.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The number of the video input is out of bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-jpegcomp.rst b/Documentation/userspace-api/media/v4l/vidioc-g-jpegcomp.rst
new file mode 100644
index 000000000..93ed111df
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-jpegcomp.rst
@@ -0,0 +1,124 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_JPEGCOMP:
+
+******************************************
+ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP
+******************************************
+
+Name
+====
+
+VIDIOC_G_JPEGCOMP - VIDIOC_S_JPEGCOMP
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_JPEGCOMP
+
+``int ioctl(int fd, VIDIOC_G_JPEGCOMP, v4l2_jpegcompression *argp)``
+
+.. c:macro:: VIDIOC_S_JPEGCOMP
+
+``int ioctl(int fd, VIDIOC_S_JPEGCOMP, const v4l2_jpegcompression *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_jpegcompression`.
+
+Description
+===========
+
+These ioctls are **deprecated**. New drivers and applications should use
+:ref:`JPEG class controls <jpeg-controls>` for image quality and JPEG
+markers control.
+
+[to do]
+
+Ronald Bultje elaborates:
+
+APP is some application-specific information. The application can set it
+itself, and it'll be stored in the JPEG-encoded fields (eg; interlacing
+information for in an AVI or so). COM is the same, but it's comments,
+like 'encoded by me' or so.
+
+jpeg_markers describes whether the huffman tables, quantization tables
+and the restart interval information (all JPEG-specific stuff) should be
+stored in the JPEG-encoded fields. These define how the JPEG field is
+encoded. If you omit them, applications assume you've used standard
+encoding. You usually do want to add them.
+
+.. tabularcolumns:: |p{1.2cm}|p{3.0cm}|p{13.3cm}|
+
+.. c:type:: v4l2_jpegcompression
+
+.. flat-table:: struct v4l2_jpegcompression
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - int
+      - ``quality``
+      - Deprecated. If
+	:ref:`V4L2_CID_JPEG_COMPRESSION_QUALITY <jpeg-quality-control>`
+	control is exposed by a driver applications should use it instead
+	and ignore this field.
+    * - int
+      - ``APPn``
+      -
+    * - int
+      - ``APP_len``
+      -
+    * - char
+      - ``APP_data``\ [60]
+      -
+    * - int
+      - ``COM_len``
+      -
+    * - char
+      - ``COM_data``\ [60]
+      -
+    * - __u32
+      - ``jpeg_markers``
+      - See :ref:`jpeg-markers`. Deprecated. If
+	:ref:`V4L2_CID_JPEG_ACTIVE_MARKER <jpeg-active-marker-control>`
+	control is exposed by a driver applications should use it instead
+	and ignore this field.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _jpeg-markers:
+
+.. flat-table:: JPEG Markers Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_JPEG_MARKER_DHT``
+      - (1<<3)
+      - Define Huffman Tables
+    * - ``V4L2_JPEG_MARKER_DQT``
+      - (1<<4)
+      - Define Quantization Tables
+    * - ``V4L2_JPEG_MARKER_DRI``
+      - (1<<5)
+      - Define Restart Interval
+    * - ``V4L2_JPEG_MARKER_COM``
+      - (1<<6)
+      - Comment segment
+    * - ``V4L2_JPEG_MARKER_APP``
+      - (1<<7)
+      - App segment, driver will always use APP0
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-modulator.rst b/Documentation/userspace-api/media/v4l/vidioc-g-modulator.rst
new file mode 100644
index 000000000..2ac2473e3
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-modulator.rst
@@ -0,0 +1,192 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_MODULATOR:
+
+********************************************
+ioctl VIDIOC_G_MODULATOR, VIDIOC_S_MODULATOR
+********************************************
+
+Name
+====
+
+VIDIOC_G_MODULATOR - VIDIOC_S_MODULATOR - Get or set modulator attributes
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_MODULATOR
+
+``int ioctl(int fd, VIDIOC_G_MODULATOR, struct v4l2_modulator *argp)``
+
+.. c:macro:: VIDIOC_S_MODULATOR
+
+``int ioctl(int fd, VIDIOC_S_MODULATOR, const struct v4l2_modulator *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_modulator`.
+
+Description
+===========
+
+To query the attributes of a modulator applications initialize the
+``index`` field and zero out the ``reserved`` array of a struct
+:c:type:`v4l2_modulator` and call the
+:ref:`VIDIOC_G_MODULATOR <VIDIOC_G_MODULATOR>` ioctl with a pointer to this structure. Drivers
+fill the rest of the structure or return an ``EINVAL`` error code when the
+index is out of bounds. To enumerate all modulators applications shall
+begin at index zero, incrementing by one until the driver returns
+EINVAL.
+
+Modulators have two writable properties, an audio modulation set and the
+radio frequency. To change the modulated audio subprograms, applications
+initialize the ``index`` and ``txsubchans`` fields and the ``reserved``
+array and call the :ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` ioctl. Drivers may choose a
+different audio modulation if the request cannot be satisfied. However
+this is a write-only ioctl, it does not return the actual audio
+modulation selected.
+
+:ref:`SDR <sdr>` specific modulator types are ``V4L2_TUNER_SDR`` and
+``V4L2_TUNER_RF``. For SDR devices ``txsubchans`` field must be
+initialized to zero. The term 'modulator' means SDR transmitter in this
+context.
+
+To change the radio frequency the
+:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl is available.
+
+.. tabularcolumns:: |p{2.9cm}|p{2.9cm}|p{5.8cm}|p{2.9cm}|p{3.0cm}|
+
+.. c:type:: v4l2_modulator
+
+.. flat-table:: struct v4l2_modulator
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2 1 1
+
+    * - __u32
+      - ``index``
+      - Identifies the modulator, set by the application.
+    * - __u8
+      - ``name``\ [32]
+      - Name of the modulator, a NUL-terminated ASCII string.
+
+	This information is intended for the user.
+    * - __u32
+      - ``capability``
+      - Modulator capability flags. No flags are defined for this field,
+	the tuner flags in struct :c:type:`v4l2_tuner` are
+	used accordingly. The audio flags indicate the ability to encode
+	audio subprograms. They will *not* change for example with the
+	current video standard.
+    * - __u32
+      - ``rangelow``
+      - The lowest tunable frequency in units of 62.5 KHz, or if the
+	``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in units of
+	62.5 Hz, or if the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is
+	set, in units of 1 Hz.
+    * - __u32
+      - ``rangehigh``
+      - The highest tunable frequency in units of 62.5 KHz, or if the
+	``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in units of
+	62.5 Hz, or if the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is
+	set, in units of 1 Hz.
+    * - __u32
+      - ``txsubchans``
+      - With this field applications can determine how audio sub-carriers
+	shall be modulated. It contains a set of flags as defined in
+	:ref:`modulator-txsubchans`.
+
+	.. note::
+
+	   The tuner ``rxsubchans`` flags  are reused, but the
+	   semantics are different. Video output devices
+	   are assumed to have an analog or PCM audio input with 1-3
+	   channels. The ``txsubchans`` flags select one or more channels
+	   for modulation, together with some audio subprogram indicator,
+	   for example, a stereo pilot tone.
+    * - __u32
+      - ``type``
+      - :cspan:`2` Type of the modulator, see :c:type:`v4l2_tuner_type`.
+    * - __u32
+      - ``reserved``\ [3]
+      - Reserved for future extensions.
+
+	Drivers and applications must set the array to zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _modulator-txsubchans:
+
+.. flat-table:: Modulator Audio Transmission Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_TUNER_SUB_MONO``
+      - 0x0001
+      - Modulate channel 1 as mono audio, when the input has more
+	channels, a down-mix of channel 1 and 2. This flag does not
+	combine with ``V4L2_TUNER_SUB_STEREO`` or
+	``V4L2_TUNER_SUB_LANG1``.
+    * - ``V4L2_TUNER_SUB_STEREO``
+      - 0x0002
+      - Modulate channel 1 and 2 as left and right channel of a stereo
+	audio signal. When the input has only one channel or two channels
+	and ``V4L2_TUNER_SUB_SAP`` is also set, channel 1 is encoded as
+	left and right channel. This flag does not combine with
+	``V4L2_TUNER_SUB_MONO`` or ``V4L2_TUNER_SUB_LANG1``. When the
+	driver does not support stereo audio it shall fall back to mono.
+    * - ``V4L2_TUNER_SUB_LANG1``
+      - 0x0008
+      - Modulate channel 1 and 2 as primary and secondary language of a
+	bilingual audio signal. When the input has only one channel it is
+	used for both languages. It is not possible to encode the primary
+	or secondary language only. This flag does not combine with
+	``V4L2_TUNER_SUB_MONO``, ``V4L2_TUNER_SUB_STEREO`` or
+	``V4L2_TUNER_SUB_SAP``. If the hardware does not support the
+	respective audio matrix, or the current video standard does not
+	permit bilingual audio the :ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` ioctl shall
+	return an ``EINVAL`` error code and the driver shall fall back to mono
+	or stereo mode.
+    * - ``V4L2_TUNER_SUB_LANG2``
+      - 0x0004
+      - Same effect as ``V4L2_TUNER_SUB_SAP``.
+    * - ``V4L2_TUNER_SUB_SAP``
+      - 0x0004
+      - When combined with ``V4L2_TUNER_SUB_MONO`` the first channel is
+	encoded as mono audio, the last channel as Second Audio Program.
+	When the input has only one channel it is used for both audio
+	tracks. When the input has three channels the mono track is a
+	down-mix of channel 1 and 2. When combined with
+	``V4L2_TUNER_SUB_STEREO`` channel 1 and 2 are encoded as left and
+	right stereo audio, channel 3 as Second Audio Program. When the
+	input has only two channels, the first is encoded as left and
+	right channel and the second as SAP. When the input has only one
+	channel it is used for all audio tracks. It is not possible to
+	encode a Second Audio Program only. This flag must combine with
+	``V4L2_TUNER_SUB_MONO`` or ``V4L2_TUNER_SUB_STEREO``. If the
+	hardware does not support the respective audio matrix, or the
+	current video standard does not permit SAP the
+	:ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` ioctl shall return an ``EINVAL`` error code and
+	driver shall fall back to mono or stereo mode.
+    * - ``V4L2_TUNER_SUB_RDS``
+      - 0x0010
+      - Enable the RDS encoder for a radio FM transmitter.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_modulator` ``index`` is
+    out of bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-output.rst b/Documentation/userspace-api/media/v4l/vidioc-g-output.rst
new file mode 100644
index 000000000..3138c4cc8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-output.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_OUTPUT:
+
+**************************************
+ioctl VIDIOC_G_OUTPUT, VIDIOC_S_OUTPUT
+**************************************
+
+Name
+====
+
+VIDIOC_G_OUTPUT - VIDIOC_S_OUTPUT - Query or select the current video output
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_OUTPUT
+
+``int ioctl(int fd, VIDIOC_G_OUTPUT, int *argp)``
+
+.. c:macro:: VIDIOC_S_OUTPUT
+
+``int ioctl(int fd, VIDIOC_S_OUTPUT, int *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to an integer with output index.
+
+Description
+===========
+
+To query the current video output applications call the
+:ref:`VIDIOC_G_OUTPUT <VIDIOC_G_OUTPUT>` ioctl with a pointer to an integer where the driver
+stores the number of the output, as in the struct
+:c:type:`v4l2_output` ``index`` field. This ioctl will
+fail only when there are no video outputs, returning the ``EINVAL`` error
+code.
+
+To select a video output applications store the number of the desired
+output in an integer and call the :ref:`VIDIOC_S_OUTPUT <VIDIOC_G_OUTPUT>` ioctl with a
+pointer to this integer. Side effects are possible. For example outputs
+may support different video standards, so the driver may implicitly
+switch the current standard. standard. Because of these possible side
+effects applications must select an output before querying or
+negotiating any other parameters.
+
+Information about video outputs is available using the
+:ref:`VIDIOC_ENUMOUTPUT` ioctl.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The number of the video output is out of bounds, or there are no
+    video outputs at all.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-parm.rst b/Documentation/userspace-api/media/v4l/vidioc-g-parm.rst
new file mode 100644
index 000000000..724f7fa7b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-parm.rst
@@ -0,0 +1,270 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_PARM:
+
+**********************************
+ioctl VIDIOC_G_PARM, VIDIOC_S_PARM
+**********************************
+
+Name
+====
+
+VIDIOC_G_PARM - VIDIOC_S_PARM - Get or set streaming parameters
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_PARM
+
+``int ioctl(int fd, VIDIOC_G_PARM, v4l2_streamparm *argp)``
+
+.. c:macro:: VIDIOC_S_PARM
+
+``int ioctl(int fd, VIDIOC_S_PARM, v4l2_streamparm *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_streamparm`.
+
+Description
+===========
+
+Applications can request a different frame interval. The capture or
+output device will be reconfigured to support the requested frame
+interval if possible. Optionally drivers may choose to skip or
+repeat frames to achieve the requested frame interval.
+
+For stateful encoders (see :ref:`encoder`) this represents the
+frame interval that is typically embedded in the encoded video stream.
+
+Changing the frame interval shall never change the format. Changing the
+format, on the other hand, may change the frame interval.
+
+Further these ioctls can be used to determine the number of buffers used
+internally by a driver in read/write mode. For implications see the
+section discussing the :c:func:`read()` function.
+
+To get and set the streaming parameters applications call the
+:ref:`VIDIOC_G_PARM <VIDIOC_G_PARM>` and
+:ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` ioctl, respectively. They take a
+pointer to a struct :c:type:`v4l2_streamparm` which contains a
+union holding separate parameters for input and output devices.
+
+.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}|
+
+.. c:type:: v4l2_streamparm
+
+.. flat-table:: struct v4l2_streamparm
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - The buffer (stream) type, same as struct
+	:c:type:`v4l2_format` ``type``, set by the
+	application. See :c:type:`v4l2_buf_type`.
+    * - union {
+      - ``parm``
+    * - struct :c:type:`v4l2_captureparm`
+      - ``capture``
+      - Parameters for capture devices, used when ``type`` is
+	``V4L2_BUF_TYPE_VIDEO_CAPTURE`` or
+	``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``.
+    * - struct :c:type:`v4l2_outputparm`
+      - ``output``
+      - Parameters for output devices, used when ``type`` is
+	``V4L2_BUF_TYPE_VIDEO_OUTPUT`` or ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``.
+    * - __u8
+      - ``raw_data``\ [200]
+      - A place holder for future extensions.
+    * - }
+      -
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_captureparm
+
+.. flat-table:: struct v4l2_captureparm
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``capability``
+      - See :ref:`parm-caps`.
+    * - __u32
+      - ``capturemode``
+      - Set by drivers and applications, see :ref:`parm-flags`.
+    * - struct :c:type:`v4l2_fract`
+      - ``timeperframe``
+      - This is the desired period between successive frames captured by
+	the driver, in seconds.
+    * - :cspan:`2`
+
+	This will configure the speed at which the video source (e.g. a sensor)
+	generates video frames. If the speed is fixed, then the driver may
+	choose to skip or repeat frames in order to achieve the requested
+	frame rate.
+
+	For stateful encoders (see :ref:`encoder`) this represents the
+	frame interval that is typically embedded in the encoded video stream.
+
+	Applications store here the desired frame period, drivers return
+	the actual frame period.
+
+	Changing the video standard (also implicitly by switching
+	the video input) may reset this parameter to the nominal frame
+	period. To reset manually applications can just set this field to
+	zero.
+
+	Drivers support this function only when they set the
+	``V4L2_CAP_TIMEPERFRAME`` flag in the ``capability`` field.
+    * - __u32
+      - ``extendedmode``
+      - Custom (driver specific) streaming parameters. When unused,
+	applications and drivers must set this field to zero. Applications
+	using this field should check the driver name and version, see
+	:ref:`querycap`.
+    * - __u32
+      - ``readbuffers``
+      - Applications set this field to the desired number of buffers used
+	internally by the driver in :c:func:`read()` mode.
+	Drivers return the actual number of buffers. When an application
+	requests zero buffers, drivers should just return the current
+	setting rather than the minimum or an error code. For details see
+	:ref:`rw`.
+    * - __u32
+      - ``reserved``\ [4]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_outputparm
+
+.. flat-table:: struct v4l2_outputparm
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``capability``
+      - See :ref:`parm-caps`.
+    * - __u32
+      - ``outputmode``
+      - Set by drivers and applications, see :ref:`parm-flags`.
+    * - struct :c:type:`v4l2_fract`
+      - ``timeperframe``
+      - This is the desired period between successive frames output by the
+	driver, in seconds.
+    * - :cspan:`2`
+
+	The field is intended to repeat frames on the driver side in
+	:c:func:`write()` mode (in streaming mode timestamps
+	can be used to throttle the output), saving I/O bandwidth.
+
+	For stateful encoders (see :ref:`encoder`) this represents the
+	frame interval that is typically embedded in the encoded video stream
+	and it provides a hint to the encoder of the speed at which raw
+	frames are queued up to the encoder.
+
+	Applications store here the desired frame period, drivers return
+	the actual frame period.
+
+	Changing the video standard (also implicitly by switching
+	the video output) may reset this parameter to the nominal frame
+	period. To reset manually applications can just set this field to
+	zero.
+
+	Drivers support this function only when they set the
+	``V4L2_CAP_TIMEPERFRAME`` flag in the ``capability`` field.
+    * - __u32
+      - ``extendedmode``
+      - Custom (driver specific) streaming parameters. When unused,
+	applications and drivers must set this field to zero. Applications
+	using this field should check the driver name and version, see
+	:ref:`querycap`.
+    * - __u32
+      - ``writebuffers``
+      - Applications set this field to the desired number of buffers used
+	internally by the driver in :c:func:`write()` mode. Drivers
+	return the actual number of buffers. When an application requests
+	zero buffers, drivers should just return the current setting
+	rather than the minimum or an error code. For details see
+	:ref:`rw`.
+    * - __u32
+      - ``reserved``\ [4]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _parm-caps:
+
+.. flat-table:: Streaming Parameters Capabilities
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_CAP_TIMEPERFRAME``
+      - 0x1000
+      - The frame period can be modified by setting the ``timeperframe``
+	field.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _parm-flags:
+
+.. flat-table:: Capture Parameters Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_MODE_HIGHQUALITY``
+      - 0x0001
+      - High quality imaging mode. High quality mode is intended for still
+	imaging applications. The idea is to get the best possible image
+	quality that the hardware can deliver. It is not defined how the
+	driver writer may achieve that; it will depend on the hardware and
+	the ingenuity of the driver writer. High quality mode is a
+	different mode from the regular motion video capture modes. In
+	high quality mode:
+
+	-  The driver may be able to capture higher resolutions than for
+	   motion capture.
+
+	-  The driver may support fewer pixel formats than motion capture
+	   (eg; true color).
+
+	-  The driver may capture and arithmetically combine multiple
+	   successive fields or frames to remove color edge artifacts and
+	   reduce the noise in the video data.
+
+	-  The driver may capture images in slices like a scanner in order
+	   to handle larger format images than would otherwise be
+	   possible.
+
+	-  An image capture operation may be significantly slower than
+	   motion capture.
+
+	-  Moving objects in the image might have excessive motion blur.
+
+	-  Capture might only work through the :c:func:`read()` call.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-priority.rst b/Documentation/userspace-api/media/v4l/vidioc-g-priority.rst
new file mode 100644
index 000000000..d72a0c716
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-priority.rst
@@ -0,0 +1,91 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_PRIORITY:
+
+******************************************
+ioctl VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY
+******************************************
+
+Name
+====
+
+VIDIOC_G_PRIORITY - VIDIOC_S_PRIORITY - Query or request the access priority associated with a file descriptor
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_PRIORITY
+
+``int ioctl(int fd, VIDIOC_G_PRIORITY, enum v4l2_priority *argp)``
+
+.. c:macro:: VIDIOC_S_PRIORITY
+
+``int ioctl(int fd, VIDIOC_S_PRIORITY, const enum v4l2_priority *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to an enum :c:type:`v4l2_priority` type.
+
+Description
+===========
+
+To query the current access priority applications call the
+:ref:`VIDIOC_G_PRIORITY <VIDIOC_G_PRIORITY>` ioctl with a pointer to an enum v4l2_priority
+variable where the driver stores the current priority.
+
+To request an access priority applications store the desired priority in
+an enum v4l2_priority variable and call :ref:`VIDIOC_S_PRIORITY <VIDIOC_G_PRIORITY>` ioctl
+with a pointer to this variable.
+
+.. c:type:: v4l2_priority
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. flat-table:: enum v4l2_priority
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_PRIORITY_UNSET``
+      - 0
+      -
+    * - ``V4L2_PRIORITY_BACKGROUND``
+      - 1
+      - Lowest priority, usually applications running in background, for
+	example monitoring VBI transmissions. A proxy application running
+	in user space will be necessary if multiple applications want to
+	read from a device at this priority.
+    * - ``V4L2_PRIORITY_INTERACTIVE``
+      - 2
+      -
+    * - ``V4L2_PRIORITY_DEFAULT``
+      - 2
+      - Medium priority, usually applications started and interactively
+	controlled by the user. For example TV viewers, Teletext browsers,
+	or just "panel" applications to change the channel or video
+	controls. This is the default priority unless an application
+	requests another.
+    * - ``V4L2_PRIORITY_RECORD``
+      - 3
+      - Highest priority. Only one file descriptor can have this priority,
+	it blocks any other fd from changing device properties. Usually
+	applications which must not be interrupted, like video recording.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The requested priority value is invalid.
+
+EBUSY
+    Another application already requested higher priority.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-selection.rst b/Documentation/userspace-api/media/v4l/vidioc-g-selection.rst
new file mode 100644
index 000000000..9a9e589cc
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-selection.rst
@@ -0,0 +1,190 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_SELECTION:
+
+********************************************
+ioctl VIDIOC_G_SELECTION, VIDIOC_S_SELECTION
+********************************************
+
+Name
+====
+
+VIDIOC_G_SELECTION - VIDIOC_S_SELECTION - Get or set one of the selection rectangles
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_SELECTION
+
+``int ioctl(int fd, VIDIOC_G_SELECTION, struct v4l2_selection *argp)``
+
+.. c:macro:: VIDIOC_S_SELECTION
+
+``int ioctl(int fd, VIDIOC_S_SELECTION, struct v4l2_selection *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_selection`.
+
+Description
+===========
+
+The ioctls are used to query and configure selection rectangles.
+
+To query the cropping (composing) rectangle set struct
+:c:type:`v4l2_selection` ``type`` field to the
+respective buffer type. The next step is setting the
+value of struct :c:type:`v4l2_selection` ``target``
+field to ``V4L2_SEL_TGT_CROP`` (``V4L2_SEL_TGT_COMPOSE``). Please refer
+to table :ref:`v4l2-selections-common` or :ref:`selection-api` for
+additional targets. The ``flags`` and ``reserved`` fields of struct
+:c:type:`v4l2_selection` are ignored and they must be
+filled with zeros. The driver fills the rest of the structure or returns
+EINVAL error code if incorrect buffer type or target was used. If
+cropping (composing) is not supported then the active rectangle is not
+mutable and it is always equal to the bounds rectangle. Finally, the
+struct :c:type:`v4l2_rect` ``r`` rectangle is filled with
+the current cropping (composing) coordinates. The coordinates are
+expressed in driver-dependent units. The only exception are rectangles
+for images in raw formats, whose coordinates are always expressed in
+pixels.
+
+To change the cropping (composing) rectangle set the struct
+:c:type:`v4l2_selection` ``type`` field to the
+respective buffer type. The next step is setting the
+value of struct :c:type:`v4l2_selection` ``target`` to
+``V4L2_SEL_TGT_CROP`` (``V4L2_SEL_TGT_COMPOSE``). Please refer to table
+:ref:`v4l2-selections-common` or :ref:`selection-api` for additional
+targets. The struct :c:type:`v4l2_rect` ``r`` rectangle need
+to be set to the desired active area. Field struct
+:c:type:`v4l2_selection` ``reserved`` is ignored and
+must be filled with zeros. The driver may adjust coordinates of the
+requested rectangle. An application may introduce constraints to control
+rounding behaviour. The struct :c:type:`v4l2_selection`
+``flags`` field must be set to one of the following:
+
+-  ``0`` - The driver can adjust the rectangle size freely and shall
+   choose a crop/compose rectangle as close as possible to the requested
+   one.
+
+-  ``V4L2_SEL_FLAG_GE`` - The driver is not allowed to shrink the
+   rectangle. The original rectangle must lay inside the adjusted one.
+
+-  ``V4L2_SEL_FLAG_LE`` - The driver is not allowed to enlarge the
+   rectangle. The adjusted rectangle must lay inside the original one.
+
+-  ``V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE`` - The driver must choose the
+   size exactly the same as in the requested rectangle.
+
+Please refer to :ref:`sel-const-adjust`.
+
+The driver may have to adjusts the requested dimensions against hardware
+limits and other parts as the pipeline, i.e. the bounds given by the
+capture/output window or TV display. The closest possible values of
+horizontal and vertical offset and sizes are chosen according to
+following priority:
+
+1. Satisfy constraints from struct
+   :c:type:`v4l2_selection` ``flags``.
+
+2. Adjust width, height, left, and top to hardware limits and
+   alignments.
+
+3. Keep center of adjusted rectangle as close as possible to the
+   original one.
+
+4. Keep width and height as close as possible to original ones.
+
+5. Keep horizontal and vertical offset as close as possible to original
+   ones.
+
+On success the struct :c:type:`v4l2_rect` ``r`` field
+contains the adjusted rectangle. When the parameters are unsuitable the
+application may modify the cropping (composing) or image parameters and
+repeat the cycle until satisfactory parameters have been negotiated. If
+constraints flags have to be violated at then ``ERANGE`` is returned. The
+error indicates that *there exist no rectangle* that satisfies the
+constraints.
+
+Selection targets and flags are documented in
+:ref:`v4l2-selections-common`.
+
+.. _sel-const-adjust:
+
+.. kernel-figure::  constraints.svg
+    :alt:    constraints.svg
+    :align:  center
+
+    Size adjustments with constraint flags.
+
+    Behaviour of rectangle adjustment for different constraint flags.
+
+
+
+.. c:type:: v4l2_selection
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_selection
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of the buffer (from enum
+	:c:type:`v4l2_buf_type`).
+    * - __u32
+      - ``target``
+      - Used to select between
+	:ref:`cropping and composing rectangles <v4l2-selections-common>`.
+    * - __u32
+      - ``flags``
+      - Flags controlling the selection rectangle adjustments, refer to
+	:ref:`selection flags <v4l2-selection-flags>`.
+    * - struct :c:type:`v4l2_rect`
+      - ``r``
+      - The selection rectangle.
+    * - __u32
+      - ``reserved[9]``
+      - Reserved fields for future use. Drivers and applications must zero
+	this array.
+
+.. note::
+   Unfortunately in the case of multiplanar buffer types
+   (``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` and ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``)
+   this API was messed up with regards to how the :c:type:`v4l2_selection` ``type`` field
+   should be filled in. Some drivers only accepted the ``_MPLANE`` buffer type while
+   other drivers only accepted a non-multiplanar buffer type (i.e. without the
+   ``_MPLANE`` at the end).
+
+   Starting with kernel 4.13 both variations are allowed.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    Given buffer type ``type`` or the selection target ``target`` is not
+    supported, or the ``flags`` argument is not valid.
+
+ERANGE
+    It is not possible to adjust struct :c:type:`v4l2_rect`
+    ``r`` rectangle to satisfy all constraints given in the ``flags``
+    argument.
+
+ENODATA
+    Selection is not supported for this input or output.
+
+EBUSY
+    It is not possible to apply change of the selection rectangle at the
+    moment. Usually because streaming is in progress.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst b/Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst
new file mode 100644
index 000000000..752f7f5fa
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst
@@ -0,0 +1,191 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_SLICED_VBI_CAP:
+
+*****************************
+ioctl VIDIOC_G_SLICED_VBI_CAP
+*****************************
+
+Name
+====
+
+VIDIOC_G_SLICED_VBI_CAP - Query sliced VBI capabilities
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_SLICED_VBI_CAP
+
+``int ioctl(int fd, VIDIOC_G_SLICED_VBI_CAP, struct v4l2_sliced_vbi_cap *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_sliced_vbi_cap`.
+
+Description
+===========
+
+To find out which data services are supported by a sliced VBI capture or
+output device, applications initialize the ``type`` field of a struct
+:c:type:`v4l2_sliced_vbi_cap`, clear the
+``reserved`` array and call the :ref:`VIDIOC_G_SLICED_VBI_CAP <VIDIOC_G_SLICED_VBI_CAP>` ioctl. The
+driver fills in the remaining fields or returns an ``EINVAL`` error code if
+the sliced VBI API is unsupported or ``type`` is invalid.
+
+.. note::
+
+   The ``type`` field was added, and the ioctl changed from read-only
+   to write-read, in Linux 2.6.19.
+
+.. c:type:: v4l2_sliced_vbi_cap
+
+.. tabularcolumns:: |p{1.2cm}|p{4.2cm}|p{4.1cm}|p{4.0cm}|p{4.0cm}|
+
+.. flat-table:: struct v4l2_sliced_vbi_cap
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 3 2 2 2
+
+    * - __u16
+      - ``service_set``
+      - :cspan:`2` A set of all data services supported by the driver.
+
+	Equal to the union of all elements of the ``service_lines`` array.
+    * - __u16
+      - ``service_lines``\ [2][24]
+      - :cspan:`2` Each element of this array contains a set of data
+	services the hardware can look for or insert into a particular
+	scan line. Data services are defined in :ref:`vbi-services`.
+	Array indices map to ITU-R line numbers\ [#f1]_ as follows:
+    * -
+      -
+      - Element
+      - 525 line systems
+      - 625 line systems
+    * -
+      -
+      - ``service_lines``\ [0][1]
+      - 1
+      - 1
+    * -
+      -
+      - ``service_lines``\ [0][23]
+      - 23
+      - 23
+    * -
+      -
+      - ``service_lines``\ [1][1]
+      - 264
+      - 314
+    * -
+      -
+      - ``service_lines``\ [1][23]
+      - 286
+      - 336
+    * -
+    * -
+      -
+      - :cspan:`2` The number of VBI lines the hardware can capture or
+	output per frame, or the number of services it can identify on a
+	given line may be limited. For example on PAL line 16 the hardware
+	may be able to look for a VPS or Teletext signal, but not both at
+	the same time. Applications can learn about these limits using the
+	:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl as described in
+	:ref:`sliced`.
+    * -
+    * -
+      -
+      - :cspan:`2` Drivers must set ``service_lines`` [0][0] and
+	``service_lines``\ [1][0] to zero.
+    * - __u32
+      - ``type``
+      - Type of the data stream, see :c:type:`v4l2_buf_type`. Should be
+	``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` or
+	``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT``.
+    * - __u32
+      - ``reserved``\ [3]
+      - :cspan:`2` This array is reserved for future extensions.
+
+	Applications and drivers must set it to zero.
+
+.. [#f1]
+
+   See also :ref:`vbi-525` and :ref:`vbi-625`.
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{3.5cm}|p{1.0cm}|p{2.0cm}|p{2.0cm}|p{8.0cm}|
+
+.. _vbi-services:
+
+.. flat-table:: Sliced VBI services
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       2 1 1 2 2
+
+    * - Symbol
+      - Value
+      - Reference
+      - Lines, usually
+      - Payload
+    * - ``V4L2_SLICED_TELETEXT_B`` (Teletext System B)
+      - 0x0001
+      - :ref:`ets300706`,
+
+	:ref:`itu653`
+      - PAL/SECAM line 7-22, 320-335 (second field 7-22)
+      - Last 42 of the 45 byte Teletext packet, that is without clock
+	run-in and framing code, lsb first transmitted.
+    * - ``V4L2_SLICED_VPS``
+      - 0x0400
+      - :ref:`ets300231`
+      - PAL line 16
+      - Byte number 3 to 15 according to Figure 9 of ETS 300 231, lsb
+	first transmitted.
+    * - ``V4L2_SLICED_CAPTION_525``
+      - 0x1000
+      - :ref:`cea608`
+      - NTSC line 21, 284 (second field 21)
+      - Two bytes in transmission order, including parity bit, lsb first
+	transmitted.
+    * - ``V4L2_SLICED_WSS_625``
+      - 0x4000
+      - :ref:`en300294`,
+
+	:ref:`itu1119`
+      - PAL/SECAM line 23
+      -
+
+	::
+
+	    Byte        0                 1
+		 msb         lsb  msb           lsb
+	    Bit  7 6 5 4 3 2 1 0  x x 13 12 11 10 9
+    * - ``V4L2_SLICED_VBI_525``
+      - 0x1000
+      - :cspan:`2` Set of services applicable to 525 line systems.
+    * - ``V4L2_SLICED_VBI_625``
+      - 0x4401
+      - :cspan:`2` Set of services applicable to 625 line systems.
+
+.. raw:: latex
+
+    \normalsize
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The value in the ``type`` field is wrong.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-std.rst b/Documentation/userspace-api/media/v4l/vidioc-g-std.rst
new file mode 100644
index 000000000..da91fe07d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-std.rst
@@ -0,0 +1,82 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_STD:
+
+**************************************************************************
+ioctl VIDIOC_G_STD, VIDIOC_S_STD, VIDIOC_SUBDEV_G_STD, VIDIOC_SUBDEV_S_STD
+**************************************************************************
+
+Name
+====
+
+VIDIOC_G_STD - VIDIOC_S_STD - VIDIOC_SUBDEV_G_STD - VIDIOC_SUBDEV_S_STD - Query or select the video standard of the current input
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_STD
+
+``int ioctl(int fd, VIDIOC_G_STD, v4l2_std_id *argp)``
+
+.. c:macro:: VIDIOC_S_STD
+
+``int ioctl(int fd, VIDIOC_S_STD, const v4l2_std_id *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_G_STD
+
+``int ioctl(int fd, VIDIOC_SUBDEV_G_STD, v4l2_std_id *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_S_STD
+
+``int ioctl(int fd, VIDIOC_SUBDEV_S_STD, const v4l2_std_id *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to :c:type:`v4l2_std_id`.
+
+Description
+===========
+
+To query and select the current video standard applications use the
+:ref:`VIDIOC_G_STD <VIDIOC_G_STD>` and :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` ioctls which take a pointer to a
+:ref:`v4l2_std_id <v4l2-std-id>` type as argument. :ref:`VIDIOC_G_STD <VIDIOC_G_STD>`
+can return a single flag or a set of flags as in struct
+:c:type:`v4l2_standard` field ``id``. The flags must be
+unambiguous such that they appear in only one enumerated
+struct :c:type:`v4l2_standard` structure.
+
+:ref:`VIDIOC_S_STD <VIDIOC_G_STD>` accepts one or more flags, being a write-only ioctl it
+does not return the actual new standard as :ref:`VIDIOC_G_STD <VIDIOC_G_STD>` does. When
+no flags are given or the current input does not support the requested
+standard the driver returns an ``EINVAL`` error code. When the standard set
+is ambiguous drivers may return ``EINVAL`` or choose any of the requested
+standards. If the current input or output does not support standard
+video timings (e.g. if :ref:`VIDIOC_ENUMINPUT`
+does not set the ``V4L2_IN_CAP_STD`` flag), then ``ENODATA`` error code is
+returned.
+
+Calling ``VIDIOC_SUBDEV_S_STD`` on a subdev device node that has been registered
+in read-only mode is not allowed. An error is returned and the errno variable is
+set to ``-EPERM``.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` parameter was unsuitable.
+
+ENODATA
+    Standard video timings are not supported for this input or output.
+
+EPERM
+    ``VIDIOC_SUBDEV_S_STD`` has been called on a read-only subdevice.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-tuner.rst b/Documentation/userspace-api/media/v4l/vidioc-g-tuner.rst
new file mode 100644
index 000000000..116e66c01
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-tuner.rst
@@ -0,0 +1,464 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_TUNER:
+
+************************************
+ioctl VIDIOC_G_TUNER, VIDIOC_S_TUNER
+************************************
+
+Name
+====
+
+VIDIOC_G_TUNER - VIDIOC_S_TUNER - Get or set tuner attributes
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_TUNER
+
+``int ioctl(int fd, VIDIOC_G_TUNER, struct v4l2_tuner *argp)``
+
+.. c:macro:: VIDIOC_S_TUNER
+
+``int ioctl(int fd, VIDIOC_S_TUNER, const struct v4l2_tuner *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_tuner`.
+
+Description
+===========
+
+To query the attributes of a tuner applications initialize the ``index``
+field and zero out the ``reserved`` array of a struct
+:c:type:`v4l2_tuner` and call the ``VIDIOC_G_TUNER`` ioctl
+with a pointer to this structure. Drivers fill the rest of the structure
+or return an ``EINVAL`` error code when the index is out of bounds. To
+enumerate all tuners applications shall begin at index zero,
+incrementing by one until the driver returns ``EINVAL``.
+
+Tuners have two writable properties, the audio mode and the radio
+frequency. To change the audio mode, applications initialize the
+``index``, ``audmode`` and ``reserved`` fields and call the
+``VIDIOC_S_TUNER`` ioctl. This will *not* change the current tuner,
+which is determined by the current video input. Drivers may choose a
+different audio mode if the requested mode is invalid or unsupported.
+Since this is a write-only ioctl, it does not return the actually
+selected audio mode.
+
+:ref:`SDR <sdr>` specific tuner types are ``V4L2_TUNER_SDR`` and
+``V4L2_TUNER_RF``. For SDR devices ``audmode`` field must be initialized
+to zero. The term 'tuner' means SDR receiver in this context.
+
+To change the radio frequency the
+:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl is available.
+
+ .. tabularcolumns:: |p{1.3cm}|p{3.0cm}|p{6.6cm}|p{6.6cm}|
+
+.. c:type:: v4l2_tuner
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_tuner
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - __u32
+      - ``index``
+      - :cspan:`1` Identifies the tuner, set by the application.
+    * - __u8
+      - ``name``\ [32]
+      - :cspan:`1`
+
+	Name of the tuner, a NUL-terminated ASCII string.
+
+	This information is intended for the user.
+    * - __u32
+      - ``type``
+      - :cspan:`1` Type of the tuner, see :c:type:`v4l2_tuner_type`.
+    * - __u32
+      - ``capability``
+      - :cspan:`1`
+
+	Tuner capability flags, see :ref:`tuner-capability`. Audio flags
+	indicate the ability to decode audio subprograms. They will *not*
+	change, for example with the current video standard.
+
+	When the structure refers to a radio tuner the
+	``V4L2_TUNER_CAP_LANG1``, ``V4L2_TUNER_CAP_LANG2`` and
+	``V4L2_TUNER_CAP_NORM`` flags can't be used.
+
+	If multiple frequency bands are supported, then ``capability`` is
+	the union of all ``capability`` fields of each struct
+	:c:type:`v4l2_frequency_band`.
+    * - __u32
+      - ``rangelow``
+      - :cspan:`1` The lowest tunable frequency in units of 62.5 kHz, or
+	if the ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in units
+	of 62.5 Hz, or if the ``capability`` flag ``V4L2_TUNER_CAP_1HZ``
+	is set, in units of 1 Hz. If multiple frequency bands are
+	supported, then ``rangelow`` is the lowest frequency of all the
+	frequency bands.
+    * - __u32
+      - ``rangehigh``
+      - :cspan:`1` The highest tunable frequency in units of 62.5 kHz,
+	or if the ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in
+	units of 62.5 Hz, or if the ``capability`` flag
+	``V4L2_TUNER_CAP_1HZ`` is set, in units of 1 Hz. If multiple
+	frequency bands are supported, then ``rangehigh`` is the highest
+	frequency of all the frequency bands.
+    * - __u32
+      - ``rxsubchans``
+      - :cspan:`1`
+
+	Some tuners or audio decoders can determine the received audio
+	subprograms by analyzing audio carriers, pilot tones or other
+	indicators. To pass this information drivers set flags defined in
+	:ref:`tuner-rxsubchans` in this field. For example:
+    * -
+      -
+      - ``V4L2_TUNER_SUB_MONO``
+      - receiving mono audio
+    * -
+      -
+      - ``STEREO | SAP``
+      - receiving stereo audio and a secondary audio program
+    * -
+      -
+      - ``MONO | STEREO``
+      - receiving mono or stereo audio, the hardware cannot distinguish
+    * -
+      -
+      - ``LANG1 | LANG2``
+      - receiving bilingual audio
+    * -
+      -
+      - ``MONO | STEREO | LANG1 | LANG2``
+      - receiving mono, stereo or bilingual audio
+    * -
+      -
+      - :cspan:`1`
+
+	When the ``V4L2_TUNER_CAP_STEREO``, ``_LANG1``, ``_LANG2`` or
+	``_SAP`` flag is cleared in the ``capability`` field, the
+	corresponding ``V4L2_TUNER_SUB_`` flag must not be set here.
+
+	This field is valid only if this is the tuner of the current video
+	input, or when the structure refers to a radio tuner.
+    * - __u32
+      - ``audmode``
+      - :cspan:`1`
+
+	The selected audio mode, see :ref:`tuner-audmode` for valid
+	values. The audio mode does not affect audio subprogram detection,
+	and like a :ref:`control` it does not automatically
+	change unless the requested mode is invalid or unsupported. See
+	:ref:`tuner-matrix` for possible results when the selected and
+	received audio programs do not match.
+
+	Currently this is the only field of struct
+	struct :c:type:`v4l2_tuner` applications can change.
+    * - __u32
+      - ``signal``
+      - :cspan:`1` The signal strength if known.
+
+	Ranging from 0 to 65535. Higher values indicate a better signal.
+    * - __s32
+      - ``afc``
+      - :cspan:`1` Automatic frequency control.
+
+	When the ``afc`` value is negative, the frequency is too
+	low, when positive too high.
+    * - __u32
+      - ``reserved``\ [4]
+      - :cspan:`1` Reserved for future extensions.
+
+	Drivers and applications must set the array to zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. c:type:: v4l2_tuner_type
+
+.. flat-table:: enum v4l2_tuner_type
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 6
+
+    * - ``V4L2_TUNER_RADIO``
+      - 1
+      - Tuner supports radio
+    * - ``V4L2_TUNER_ANALOG_TV``
+      - 2
+      - Tuner supports analog TV
+    * - ``V4L2_TUNER_SDR``
+      - 4
+      - Tuner controls the A/D and/or D/A block of a
+	Software Digital Radio (SDR)
+    * - ``V4L2_TUNER_RF``
+      - 5
+      - Tuner controls the RF part of a Software Digital Radio (SDR)
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _tuner-capability:
+
+.. cssclass:: longtable
+
+.. flat-table:: Tuner and Modulator Capability Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_TUNER_CAP_LOW``
+      - 0x0001
+      - When set, tuning frequencies are expressed in units of 62.5 Hz
+	instead of 62.5 kHz.
+    * - ``V4L2_TUNER_CAP_NORM``
+      - 0x0002
+      - This is a multi-standard tuner; the video standard can or must be
+	switched. (B/G PAL tuners for example are typically not considered
+	multi-standard because the video standard is automatically
+	determined from the frequency band.) The set of supported video
+	standards is available from the struct
+	:c:type:`v4l2_input` pointing to this tuner, see the
+	description of ioctl :ref:`VIDIOC_ENUMINPUT`
+	for details. Only ``V4L2_TUNER_ANALOG_TV`` tuners can have this
+	capability.
+    * - ``V4L2_TUNER_CAP_HWSEEK_BOUNDED``
+      - 0x0004
+      - If set, then this tuner supports the hardware seek functionality
+	where the seek stops when it reaches the end of the frequency
+	range.
+    * - ``V4L2_TUNER_CAP_HWSEEK_WRAP``
+      - 0x0008
+      - If set, then this tuner supports the hardware seek functionality
+	where the seek wraps around when it reaches the end of the
+	frequency range.
+    * - ``V4L2_TUNER_CAP_STEREO``
+      - 0x0010
+      - Stereo audio reception is supported.
+    * - ``V4L2_TUNER_CAP_LANG1``
+      - 0x0040
+      - Reception of the primary language of a bilingual audio program is
+	supported. Bilingual audio is a feature of two-channel systems,
+	transmitting the primary language monaural on the main audio
+	carrier and a secondary language monaural on a second carrier.
+	Only ``V4L2_TUNER_ANALOG_TV`` tuners can have this capability.
+    * - ``V4L2_TUNER_CAP_LANG2``
+      - 0x0020
+      - Reception of the secondary language of a bilingual audio program
+	is supported. Only ``V4L2_TUNER_ANALOG_TV`` tuners can have this
+	capability.
+    * - ``V4L2_TUNER_CAP_SAP``
+      - 0x0020
+      - Reception of a secondary audio program is supported. This is a
+	feature of the BTSC system which accompanies the NTSC video
+	standard. Two audio carriers are available for mono or stereo
+	transmissions of a primary language, and an independent third
+	carrier for a monaural secondary language. Only
+	``V4L2_TUNER_ANALOG_TV`` tuners can have this capability.
+
+	.. note::
+
+	   The ``V4L2_TUNER_CAP_LANG2`` and ``V4L2_TUNER_CAP_SAP``
+	   flags are synonyms. ``V4L2_TUNER_CAP_SAP`` applies when the tuner
+	   supports the ``V4L2_STD_NTSC_M`` video standard.
+    * - ``V4L2_TUNER_CAP_RDS``
+      - 0x0080
+      - RDS capture is supported. This capability is only valid for radio
+	tuners.
+    * - ``V4L2_TUNER_CAP_RDS_BLOCK_IO``
+      - 0x0100
+      - The RDS data is passed as unparsed RDS blocks.
+    * - ``V4L2_TUNER_CAP_RDS_CONTROLS``
+      - 0x0200
+      - The RDS data is parsed by the hardware and set via controls.
+    * - ``V4L2_TUNER_CAP_FREQ_BANDS``
+      - 0x0400
+      - The :ref:`VIDIOC_ENUM_FREQ_BANDS`
+	ioctl can be used to enumerate the available frequency bands.
+    * - ``V4L2_TUNER_CAP_HWSEEK_PROG_LIM``
+      - 0x0800
+      - The range to search when using the hardware seek functionality is
+	programmable, see
+	:ref:`VIDIOC_S_HW_FREQ_SEEK` for
+	details.
+    * - ``V4L2_TUNER_CAP_1HZ``
+      - 0x1000
+      - When set, tuning frequencies are expressed in units of 1 Hz
+	instead of 62.5 kHz.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _tuner-rxsubchans:
+
+.. flat-table:: Tuner Audio Reception Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_TUNER_SUB_MONO``
+      - 0x0001
+      - The tuner receives a mono audio signal.
+    * - ``V4L2_TUNER_SUB_STEREO``
+      - 0x0002
+      - The tuner receives a stereo audio signal.
+    * - ``V4L2_TUNER_SUB_LANG1``
+      - 0x0008
+      - The tuner receives the primary language of a bilingual audio
+	signal. Drivers must clear this flag when the current video
+	standard is ``V4L2_STD_NTSC_M``.
+    * - ``V4L2_TUNER_SUB_LANG2``
+      - 0x0004
+      - The tuner receives the secondary language of a bilingual audio
+	signal (or a second audio program).
+    * - ``V4L2_TUNER_SUB_SAP``
+      - 0x0004
+      - The tuner receives a Second Audio Program.
+
+	.. note::
+
+	   The ``V4L2_TUNER_SUB_LANG2`` and ``V4L2_TUNER_SUB_SAP``
+	   flags are synonyms. The ``V4L2_TUNER_SUB_SAP`` flag applies
+	   when the current video standard is ``V4L2_STD_NTSC_M``.
+    * - ``V4L2_TUNER_SUB_RDS``
+      - 0x0010
+      - The tuner receives an RDS channel.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _tuner-audmode:
+
+.. flat-table:: Tuner Audio Modes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_TUNER_MODE_MONO``
+      - 0
+      - Play mono audio. When the tuner receives a stereo signal this a
+	down-mix of the left and right channel. When the tuner receives a
+	bilingual or SAP signal this mode selects the primary language.
+    * - ``V4L2_TUNER_MODE_STEREO``
+      - 1
+      - Play stereo audio. When the tuner receives bilingual audio it may
+	play different languages on the left and right channel or the
+	primary language is played on both channels.
+
+	Playing different languages in this mode is deprecated. New
+	drivers should do this only in ``MODE_LANG1_LANG2``.
+
+	When the tuner receives no stereo signal or does not support
+	stereo reception the driver shall fall back to ``MODE_MONO``.
+    * - ``V4L2_TUNER_MODE_LANG1``
+      - 3
+      - Play the primary language, mono or stereo. Only
+	``V4L2_TUNER_ANALOG_TV`` tuners support this mode.
+    * - ``V4L2_TUNER_MODE_LANG2``
+      - 2
+      - Play the secondary language, mono. When the tuner receives no
+	bilingual audio or SAP, or their reception is not supported the
+	driver shall fall back to mono or stereo mode. Only
+	``V4L2_TUNER_ANALOG_TV`` tuners support this mode.
+    * - ``V4L2_TUNER_MODE_SAP``
+      - 2
+      - Play the Second Audio Program. When the tuner receives no
+	bilingual audio or SAP, or their reception is not supported the
+	driver shall fall back to mono or stereo mode. Only
+	``V4L2_TUNER_ANALOG_TV`` tuners support this mode.
+
+	.. note:: The ``V4L2_TUNER_MODE_LANG2`` and ``V4L2_TUNER_MODE_SAP``
+	   are synonyms.
+    * - ``V4L2_TUNER_MODE_LANG1_LANG2``
+      - 4
+      - Play the primary language on the left channel, the secondary
+	language on the right channel. When the tuner receives no
+	bilingual audio or SAP, it shall fall back to ``MODE_LANG1`` or
+	``MODE_MONO``. Only ``V4L2_TUNER_ANALOG_TV`` tuners support this
+	mode.
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{1.5cm}|p{1.5cm}|p{2.9cm}|p{2.9cm}|p{2.9cm}|p{2.9cm}|
+
+.. _tuner-matrix:
+
+.. flat-table:: Tuner Audio Matrix
+    :header-rows:  2
+    :stub-columns: 0
+    :widths: 7 7 14 14 14 14
+
+    * -
+      - :cspan:`4` Selected ``V4L2_TUNER_MODE_``
+    * - Received ``V4L2_TUNER_SUB_``
+      - ``MONO``
+      - ``STEREO``
+      - ``LANG1``
+      - ``LANG2 = SAP``
+      - ``LANG1_LANG2``\ [#f1]_
+    * - ``MONO``
+      - Mono
+      - Mono/Mono
+      - Mono
+      - Mono
+      - Mono/Mono
+    * - ``MONO | SAP``
+      - Mono
+      - Mono/Mono
+      - Mono
+      - SAP
+      - Mono/SAP (preferred) or Mono/Mono
+    * - ``STEREO``
+      - L+R
+      - L/R
+      - Stereo L/R (preferred) or Mono L+R
+      - Stereo L/R (preferred) or Mono L+R
+      - L/R (preferred) or L+R/L+R
+    * - ``STEREO | SAP``
+      - L+R
+      - L/R
+      - Stereo L/R (preferred) or Mono L+R
+      - SAP
+      - L+R/SAP (preferred) or L/R or L+R/L+R
+    * - ``LANG1 | LANG2``
+      - Language 1
+      - Lang1/Lang2 (deprecated\ [#f2]_) or Lang1/Lang1
+      - Language 1
+      - Language 2
+      - Lang1/Lang2 (preferred) or Lang1/Lang1
+
+.. raw:: latex
+
+    \normalsize
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :c:type:`v4l2_tuner` ``index`` is out of
+    bounds.
+
+.. [#f1]
+   This mode has been added in Linux 2.6.17 and may not be supported by
+   older drivers.
+
+.. [#f2]
+   Playback of both languages in ``MODE_STEREO`` is deprecated. In the
+   future drivers should produce only the primary language in this mode.
+   Applications should request ``MODE_LANG1_LANG2`` to record both
+   languages or a stereo signal.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-log-status.rst b/Documentation/userspace-api/media/v4l/vidioc-log-status.rst
new file mode 100644
index 000000000..c218747be
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-log-status.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_LOG_STATUS:
+
+***********************
+ioctl VIDIOC_LOG_STATUS
+***********************
+
+Name
+====
+
+VIDIOC_LOG_STATUS - Log driver status information
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_LOG_STATUS
+
+``int ioctl(int fd, VIDIOC_LOG_STATUS)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+Description
+===========
+
+As the video/audio devices become more complicated it becomes harder to
+debug problems. When this ioctl is called the driver will output the
+current device status to the kernel log. This is particular useful when
+dealing with problems like no sound, no video and incorrectly tuned
+channels. Also many modern devices autodetect video and audio standards
+and this ioctl will report what the device thinks what the standard is.
+Mismatches may give an indication where the problem is.
+
+This ioctl is optional and not all drivers support it. It was introduced
+in Linux 2.6.15.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-overlay.rst b/Documentation/userspace-api/media/v4l/vidioc-overlay.rst
new file mode 100644
index 000000000..f2efaaba2
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-overlay.rst
@@ -0,0 +1,52 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_OVERLAY:
+
+********************
+ioctl VIDIOC_OVERLAY
+********************
+
+Name
+====
+
+VIDIOC_OVERLAY - Start or stop video overlay
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_OVERLAY
+
+``int ioctl(int fd, VIDIOC_OVERLAY, const int *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to an integer.
+
+Description
+===========
+
+This ioctl is part of the :ref:`video overlay <overlay>` I/O method.
+Applications call :ref:`VIDIOC_OVERLAY` to start or stop the overlay. It
+takes a pointer to an integer which must be set to zero by the
+application to stop overlay, to one to start.
+
+Drivers do not support :ref:`VIDIOC_STREAMON` or
+:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` with
+``V4L2_BUF_TYPE_VIDEO_OVERLAY``.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The overlay parameters have not been set up. See :ref:`overlay`
+    for the necessary steps.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-prepare-buf.rst b/Documentation/userspace-api/media/v4l/vidioc-prepare-buf.rst
new file mode 100644
index 000000000..45bb1eab2
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-prepare-buf.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_PREPARE_BUF:
+
+************************
+ioctl VIDIOC_PREPARE_BUF
+************************
+
+Name
+====
+
+VIDIOC_PREPARE_BUF - Prepare a buffer for I/O
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_PREPARE_BUF
+
+``int ioctl(int fd, VIDIOC_PREPARE_BUF, struct v4l2_buffer *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_buffer`.
+
+Description
+===========
+
+Applications can optionally call the :ref:`VIDIOC_PREPARE_BUF` ioctl to
+pass ownership of the buffer to the driver before actually enqueuing it,
+using the :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl, and to prepare it for future I/O. Such
+preparations may include cache invalidation or cleaning. Performing them
+in advance saves time during the actual I/O.
+
+The struct :c:type:`v4l2_buffer` structure is specified in
+:ref:`buffer`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EBUSY
+    File I/O is in progress.
+
+EINVAL
+    The buffer ``type`` is not supported, or the ``index`` is out of
+    bounds, or no buffers have been allocated yet, or the ``userptr`` or
+    ``length`` are invalid.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-qbuf.rst b/Documentation/userspace-api/media/v4l/vidioc-qbuf.rst
new file mode 100644
index 000000000..fbf8c5962
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-qbuf.rst
@@ -0,0 +1,197 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_QBUF:
+
+*******************************
+ioctl VIDIOC_QBUF, VIDIOC_DQBUF
+*******************************
+
+Name
+====
+
+VIDIOC_QBUF - VIDIOC_DQBUF - Exchange a buffer with the driver
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_QBUF
+
+``int ioctl(int fd, VIDIOC_QBUF, struct v4l2_buffer *argp)``
+
+.. c:macro:: VIDIOC_DQBUF
+
+``int ioctl(int fd, VIDIOC_DQBUF, struct v4l2_buffer *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_buffer`.
+
+Description
+===========
+
+Applications call the ``VIDIOC_QBUF`` ioctl to enqueue an empty
+(capturing) or filled (output) buffer in the driver's incoming queue.
+The semantics depend on the selected I/O method.
+
+To enqueue a buffer applications set the ``type`` field of a struct
+:c:type:`v4l2_buffer` to the same buffer type as was
+previously used with struct :c:type:`v4l2_format` ``type``
+and struct :c:type:`v4l2_requestbuffers` ``type``.
+Applications must also set the ``index`` field. Valid index numbers
+range from zero to the number of buffers allocated with
+:ref:`VIDIOC_REQBUFS` (struct
+:c:type:`v4l2_requestbuffers` ``count``) minus
+one. The contents of the struct :c:type:`v4l2_buffer` returned
+by a :ref:`VIDIOC_QUERYBUF` ioctl will do as well.
+When the buffer is intended for output (``type`` is
+``V4L2_BUF_TYPE_VIDEO_OUTPUT``, ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``,
+or ``V4L2_BUF_TYPE_VBI_OUTPUT``) applications must also initialize the
+``bytesused``, ``field`` and ``timestamp`` fields, see :ref:`buffer`
+for details. Applications must also set ``flags`` to 0. The
+``reserved2`` and ``reserved`` fields must be set to 0. When using the
+:ref:`multi-planar API <planar-apis>`, the ``m.planes`` field must
+contain a userspace pointer to a filled-in array of struct
+:c:type:`v4l2_plane` and the ``length`` field must be set
+to the number of elements in that array.
+
+To enqueue a :ref:`memory mapped <mmap>` buffer applications set the
+``memory`` field to ``V4L2_MEMORY_MMAP``. When ``VIDIOC_QBUF`` is called
+with a pointer to this structure the driver sets the
+``V4L2_BUF_FLAG_MAPPED`` and ``V4L2_BUF_FLAG_QUEUED`` flags and clears
+the ``V4L2_BUF_FLAG_DONE`` flag in the ``flags`` field, or it returns an
+``EINVAL`` error code.
+
+To enqueue a :ref:`user pointer <userp>` buffer applications set the
+``memory`` field to ``V4L2_MEMORY_USERPTR``, the ``m.userptr`` field to
+the address of the buffer and ``length`` to its size. When the
+multi-planar API is used, ``m.userptr`` and ``length`` members of the
+passed array of struct :c:type:`v4l2_plane` have to be used
+instead. When ``VIDIOC_QBUF`` is called with a pointer to this structure
+the driver sets the ``V4L2_BUF_FLAG_QUEUED`` flag and clears the
+``V4L2_BUF_FLAG_MAPPED`` and ``V4L2_BUF_FLAG_DONE`` flags in the
+``flags`` field, or it returns an error code. This ioctl locks the
+memory pages of the buffer in physical memory, they cannot be swapped
+out to disk. Buffers remain locked until dequeued, until the
+:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` or
+:ref:`VIDIOC_REQBUFS` ioctl is called, or until the
+device is closed.
+
+To enqueue a :ref:`DMABUF <dmabuf>` buffer applications set the
+``memory`` field to ``V4L2_MEMORY_DMABUF`` and the ``m.fd`` field to a
+file descriptor associated with a DMABUF buffer. When the multi-planar
+API is used the ``m.fd`` fields of the passed array of struct
+:c:type:`v4l2_plane` have to be used instead. When
+``VIDIOC_QBUF`` is called with a pointer to this structure the driver
+sets the ``V4L2_BUF_FLAG_QUEUED`` flag and clears the
+``V4L2_BUF_FLAG_MAPPED`` and ``V4L2_BUF_FLAG_DONE`` flags in the
+``flags`` field, or it returns an error code. This ioctl locks the
+buffer. Locking a buffer means passing it to a driver for a hardware
+access (usually DMA). If an application accesses (reads/writes) a locked
+buffer then the result is undefined. Buffers remain locked until
+dequeued, until the :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` or
+:ref:`VIDIOC_REQBUFS` ioctl is called, or until the
+device is closed.
+
+The ``request_fd`` field can be used with the ``VIDIOC_QBUF`` ioctl to specify
+the file descriptor of a :ref:`request <media-request-api>`, if requests are
+in use. Setting it means that the buffer will not be passed to the driver
+until the request itself is queued. Also, the driver will apply any
+settings associated with the request for this buffer. This field will
+be ignored unless the ``V4L2_BUF_FLAG_REQUEST_FD`` flag is set.
+If the device does not support requests, then ``EBADR`` will be returned.
+If requests are supported but an invalid request file descriptor is given,
+then ``EINVAL`` will be returned.
+
+.. caution::
+   It is not allowed to mix queuing requests with queuing buffers directly.
+   ``EBUSY`` will be returned if the first buffer was queued directly and
+   then the application tries to queue a request, or vice versa. After
+   closing the file descriptor, calling
+   :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` or calling :ref:`VIDIOC_REQBUFS`
+   the check for this will be reset.
+
+   For :ref:`memory-to-memory devices <mem2mem>` you can specify the
+   ``request_fd`` only for output buffers, not for capture buffers. Attempting
+   to specify this for a capture buffer will result in an ``EBADR`` error.
+
+Applications call the ``VIDIOC_DQBUF`` ioctl to dequeue a filled
+(capturing) or displayed (output) buffer from the driver's outgoing
+queue. They just set the ``type``, ``memory`` and ``reserved`` fields of
+a struct :c:type:`v4l2_buffer` as above, when
+``VIDIOC_DQBUF`` is called with a pointer to this structure the driver
+fills the remaining fields or returns an error code. The driver may also
+set ``V4L2_BUF_FLAG_ERROR`` in the ``flags`` field. It indicates a
+non-critical (recoverable) streaming error. In such case the application
+may continue as normal, but should be aware that data in the dequeued
+buffer might be corrupted. When using the multi-planar API, the planes
+array must be passed in as well.
+
+If the application sets the ``memory`` field to ``V4L2_MEMORY_DMABUF`` to
+dequeue a :ref:`DMABUF <dmabuf>` buffer, the driver fills the ``m.fd`` field
+with a file descriptor numerically the same as the one given to ``VIDIOC_QBUF``
+when the buffer was enqueued. No new file descriptor is created at dequeue time
+and the value is only for the application convenience. When the multi-planar
+API is used the ``m.fd`` fields of the passed array of struct
+:c:type:`v4l2_plane` are filled instead.
+
+By default ``VIDIOC_DQBUF`` blocks when no buffer is in the outgoing
+queue. When the ``O_NONBLOCK`` flag was given to the
+:c:func:`open()` function, ``VIDIOC_DQBUF`` returns
+immediately with an ``EAGAIN`` error code when no buffer is available.
+
+The struct :c:type:`v4l2_buffer` structure is specified in
+:ref:`buffer`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EAGAIN
+    Non-blocking I/O has been selected using ``O_NONBLOCK`` and no
+    buffer was in the outgoing queue.
+
+EINVAL
+    The buffer ``type`` is not supported, or the ``index`` is out of
+    bounds, or no buffers have been allocated yet, or the ``userptr`` or
+    ``length`` are invalid, or the ``V4L2_BUF_FLAG_REQUEST_FD`` flag was
+    set but the the given ``request_fd`` was invalid, or ``m.fd`` was
+    an invalid DMABUF file descriptor.
+
+EIO
+    ``VIDIOC_DQBUF`` failed due to an internal error. Can also indicate
+    temporary problems like signal loss.
+
+    .. note::
+
+       The driver might dequeue an (empty) buffer despite returning
+       an error, or even stop capturing. Reusing such buffer may be unsafe
+       though and its details (e.g. ``index``) may not be returned either.
+       It is recommended that drivers indicate recoverable errors by setting
+       the ``V4L2_BUF_FLAG_ERROR`` and returning 0 instead. In that case the
+       application should be able to safely reuse the buffer and continue
+       streaming.
+
+EPIPE
+    ``VIDIOC_DQBUF`` returns this on an empty capture queue for mem2mem
+    codecs if a buffer with the ``V4L2_BUF_FLAG_LAST`` was already
+    dequeued and no new buffers are expected to become available.
+
+EBADR
+    The ``V4L2_BUF_FLAG_REQUEST_FD`` flag was set but the device does not
+    support requests for the given buffer type, or
+    the ``V4L2_BUF_FLAG_REQUEST_FD`` flag was not set but the device requires
+    that the buffer is part of a request.
+
+EBUSY
+    The first buffer was queued via a request, but the application now tries
+    to queue it directly, or vice versa (it is not permitted to mix the two
+    APIs).
diff --git a/Documentation/userspace-api/media/v4l/vidioc-query-dv-timings.rst b/Documentation/userspace-api/media/v4l/vidioc-query-dv-timings.rst
new file mode 100644
index 000000000..5afdc4b4d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-query-dv-timings.rst
@@ -0,0 +1,86 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_QUERY_DV_TIMINGS:
+
+*****************************
+ioctl VIDIOC_QUERY_DV_TIMINGS
+*****************************
+
+Name
+====
+
+VIDIOC_QUERY_DV_TIMINGS - VIDIOC_SUBDEV_QUERY_DV_TIMINGS - Sense the DV preset received by the current input
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_QUERY_DV_TIMINGS
+
+``int ioctl(int fd, VIDIOC_QUERY_DV_TIMINGS, struct v4l2_dv_timings *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_QUERY_DV_TIMINGS
+
+``int ioctl(int fd, VIDIOC_SUBDEV_QUERY_DV_TIMINGS, struct v4l2_dv_timings *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_dv_timings`.
+
+Description
+===========
+
+The hardware may be able to detect the current DV timings automatically,
+similar to sensing the video standard. To do so, applications call
+:ref:`VIDIOC_QUERY_DV_TIMINGS` with a pointer to a struct
+:c:type:`v4l2_dv_timings`. Once the hardware detects
+the timings, it will fill in the timings structure.
+
+.. note::
+
+   Drivers shall *not* switch timings automatically if new
+   timings are detected. Instead, drivers should send the
+   ``V4L2_EVENT_SOURCE_CHANGE`` event (if they support this) and expect
+   that userspace will take action by calling :ref:`VIDIOC_QUERY_DV_TIMINGS`.
+   The reason is that new timings usually mean different buffer sizes as
+   well, and you cannot change buffer sizes on the fly. In general,
+   applications that receive the Source Change event will have to call
+   :ref:`VIDIOC_QUERY_DV_TIMINGS`, and if the detected timings are valid they
+   will have to stop streaming, set the new timings, allocate new buffers
+   and start streaming again.
+
+If the timings could not be detected because there was no signal, then
+ENOLINK is returned. If a signal was detected, but it was unstable and
+the receiver could not lock to the signal, then ``ENOLCK`` is returned. If
+the receiver could lock to the signal, but the format is unsupported
+(e.g. because the pixelclock is out of range of the hardware
+capabilities), then the driver fills in whatever timings it could find
+and returns ``ERANGE``. In that case the application can call
+:ref:`VIDIOC_DV_TIMINGS_CAP` to compare the
+found timings with the hardware's capabilities in order to give more
+precise feedback to the user.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+ENODATA
+    Digital video timings are not supported for this input or output.
+
+ENOLINK
+    No timings could be detected because no signal was found.
+
+ENOLCK
+    The signal was unstable and the hardware could not lock on to it.
+
+ERANGE
+    Timings were found, but they are out of range of the hardware
+    capabilities.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-querybuf.rst b/Documentation/userspace-api/media/v4l/vidioc-querybuf.rst
new file mode 100644
index 000000000..6c615e893
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-querybuf.rst
@@ -0,0 +1,78 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_QUERYBUF:
+
+*********************
+ioctl VIDIOC_QUERYBUF
+*********************
+
+Name
+====
+
+VIDIOC_QUERYBUF - Query the status of a buffer
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_QUERYBUF
+
+``int ioctl(int fd, VIDIOC_QUERYBUF, struct v4l2_buffer *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_buffer`.
+
+Description
+===========
+
+This ioctl is part of the :ref:`streaming <mmap>` I/O method. It can
+be used to query the status of a buffer at any time after buffers have
+been allocated with the :ref:`VIDIOC_REQBUFS` ioctl.
+
+Applications set the ``type`` field of a struct
+:c:type:`v4l2_buffer` to the same buffer type as was
+previously used with struct :c:type:`v4l2_format` ``type``
+and struct :c:type:`v4l2_requestbuffers` ``type``,
+and the ``index`` field. Valid index numbers range from zero to the
+number of buffers allocated with
+:ref:`VIDIOC_REQBUFS` (struct
+:c:type:`v4l2_requestbuffers` ``count``) minus
+one. The ``reserved`` and ``reserved2`` fields must be set to 0. When
+using the :ref:`multi-planar API <planar-apis>`, the ``m.planes``
+field must contain a userspace pointer to an array of struct
+:c:type:`v4l2_plane` and the ``length`` field has to be set
+to the number of elements in that array. After calling
+:ref:`VIDIOC_QUERYBUF` with a pointer to this structure drivers return an
+error code or fill the rest of the structure.
+
+In the ``flags`` field the ``V4L2_BUF_FLAG_MAPPED``,
+``V4L2_BUF_FLAG_PREPARED``, ``V4L2_BUF_FLAG_QUEUED`` and
+``V4L2_BUF_FLAG_DONE`` flags will be valid. The ``memory`` field will be
+set to the current I/O method. For the single-planar API, the
+``m.offset`` contains the offset of the buffer from the start of the
+device memory, the ``length`` field its size. For the multi-planar API,
+fields ``m.mem_offset`` and ``length`` in the ``m.planes`` array
+elements will be used instead and the ``length`` field of struct
+:c:type:`v4l2_buffer` is set to the number of filled-in
+array elements. The driver may or may not set the remaining fields and
+flags, they are meaningless in this context.
+
+The struct :c:type:`v4l2_buffer` structure is specified in
+:ref:`buffer`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The buffer ``type`` is not supported, or the ``index`` is out of
+    bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst
new file mode 100644
index 000000000..b512b1fbf
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst
@@ -0,0 +1,279 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_QUERYCAP:
+
+*********************
+ioctl VIDIOC_QUERYCAP
+*********************
+
+Name
+====
+
+VIDIOC_QUERYCAP - Query device capabilities
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_QUERYCAP
+
+``int ioctl(int fd, VIDIOC_QUERYCAP, struct v4l2_capability *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_capability`.
+
+Description
+===========
+
+All V4L2 devices support the ``VIDIOC_QUERYCAP`` ioctl. It is used to
+identify kernel devices compatible with this specification and to obtain
+information about driver and hardware capabilities. The ioctl takes a
+pointer to a struct :c:type:`v4l2_capability` which is
+filled by the driver. When the driver is not compatible with this
+specification the ioctl returns an ``EINVAL`` error code.
+
+.. tabularcolumns:: |p{1.5cm}|p{2.5cm}|p{13cm}|
+
+.. c:type:: v4l2_capability
+
+.. flat-table:: struct v4l2_capability
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 4 20
+
+    * - __u8
+      - ``driver``\ [16]
+      - Name of the driver, a unique NUL-terminated ASCII string. For
+	example: "bttv". Driver specific applications can use this
+	information to verify the driver identity. It is also useful to
+	work around known bugs, or to identify drivers in error reports.
+
+	Storing strings in fixed sized arrays is bad practice but
+	unavoidable here. Drivers and applications should take precautions
+	to never read or write beyond the end of the array and to make
+	sure the strings are properly NUL-terminated.
+    * - __u8
+      - ``card``\ [32]
+      - Name of the device, a NUL-terminated UTF-8 string. For example:
+	"Yoyodyne TV/FM". One driver may support different brands or
+	models of video hardware. This information is intended for users,
+	for example in a menu of available devices. Since multiple TV
+	cards of the same brand may be installed which are supported by
+	the same driver, this name should be combined with the character
+	device file name (e. g. ``/dev/video2``) or the ``bus_info``
+	string to avoid ambiguities.
+    * - __u8
+      - ``bus_info``\ [32]
+      - Location of the device in the system, a NUL-terminated ASCII
+	string. For example: "PCI:0000:05:06.0". This information is
+	intended for users, to distinguish multiple identical devices. If
+	no such information is available the field must simply count the
+	devices controlled by the driver ("platform:vivid-000"). The
+	bus_info must start with "PCI:" for PCI boards, "PCIe:" for PCI
+	Express boards, "usb-" for USB devices, "I2C:" for i2c devices,
+	"ISA:" for ISA devices, "parport" for parallel port devices and
+	"platform:" for platform devices.
+    * - __u32
+      - ``version``
+      - Version number of the driver.
+
+	Starting with kernel 3.1, the version reported is provided by the
+	V4L2 subsystem following the kernel numbering scheme. However, it
+	may not always return the same version as the kernel if, for
+	example, a stable or distribution-modified kernel uses the V4L2
+	stack from a newer kernel.
+
+	The version number is formatted using the ``KERNEL_VERSION()``
+	macro. For example if the media stack corresponds to the V4L2
+	version shipped with Kernel 4.14, it would be equivalent to:
+    * - :cspan:`2`
+
+	``#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))``
+
+	``__u32 version = KERNEL_VERSION(4, 14, 0);``
+
+	``printf ("Version: %u.%u.%u\\n",``
+
+	``(version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);``
+    * - __u32
+      - ``capabilities``
+      - Available capabilities of the physical device as a whole, see
+	:ref:`device-capabilities`. The same physical device can export
+	multiple devices in /dev (e.g. /dev/videoX, /dev/vbiY and
+	/dev/radioZ). The ``capabilities`` field should contain a union of
+	all capabilities available around the several V4L2 devices
+	exported to userspace. For all those devices the ``capabilities``
+	field returns the same set of capabilities. This allows
+	applications to open just one of the devices (typically the video
+	device) and discover whether video, vbi and/or radio are also
+	supported.
+    * - __u32
+      - ``device_caps``
+      - Device capabilities of the opened device, see
+	:ref:`device-capabilities`. Should contain the available
+	capabilities of that specific device node. So, for example,
+	``device_caps`` of a radio device will only contain radio related
+	capabilities and no video or vbi capabilities. This field is only
+	set if the ``capabilities`` field contains the
+	``V4L2_CAP_DEVICE_CAPS`` capability. Only the ``capabilities``
+	field can have the ``V4L2_CAP_DEVICE_CAPS`` capability,
+	``device_caps`` will never set ``V4L2_CAP_DEVICE_CAPS``.
+    * - __u32
+      - ``reserved``\ [3]
+      - Reserved for future extensions. Drivers must set this array to
+	zero.
+
+
+.. tabularcolumns:: |p{6.1cm}|p{2.2cm}|p{8.7cm}|
+
+.. _device-capabilities:
+
+.. cssclass:: longtable
+
+.. flat-table:: Device Capabilities Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_CAP_VIDEO_CAPTURE``
+      - 0x00000001
+      - The device supports the single-planar API through the
+	:ref:`Video Capture <capture>` interface.
+    * - ``V4L2_CAP_VIDEO_CAPTURE_MPLANE``
+      - 0x00001000
+      - The device supports the :ref:`multi-planar API <planar-apis>`
+	through the :ref:`Video Capture <capture>` interface.
+    * - ``V4L2_CAP_VIDEO_OUTPUT``
+      - 0x00000002
+      - The device supports the single-planar API through the
+	:ref:`Video Output <output>` interface.
+    * - ``V4L2_CAP_VIDEO_OUTPUT_MPLANE``
+      - 0x00002000
+      - The device supports the :ref:`multi-planar API <planar-apis>`
+	through the :ref:`Video Output <output>` interface.
+    * - ``V4L2_CAP_VIDEO_M2M``
+      - 0x00008000
+      - The device supports the single-planar API through the Video
+	Memory-To-Memory interface.
+    * - ``V4L2_CAP_VIDEO_M2M_MPLANE``
+      - 0x00004000
+      - The device supports the :ref:`multi-planar API <planar-apis>`
+	through the Video Memory-To-Memory interface.
+    * - ``V4L2_CAP_VIDEO_OVERLAY``
+      - 0x00000004
+      - The device supports the :ref:`Video Overlay <overlay>`
+	interface. A video overlay device typically stores captured images
+	directly in the video memory of a graphics card, with hardware
+	clipping and scaling.
+    * - ``V4L2_CAP_VBI_CAPTURE``
+      - 0x00000010
+      - The device supports the :ref:`Raw VBI Capture <raw-vbi>`
+	interface, providing Teletext and Closed Caption data.
+    * - ``V4L2_CAP_VBI_OUTPUT``
+      - 0x00000020
+      - The device supports the :ref:`Raw VBI Output <raw-vbi>`
+	interface.
+    * - ``V4L2_CAP_SLICED_VBI_CAPTURE``
+      - 0x00000040
+      - The device supports the :ref:`Sliced VBI Capture <sliced>`
+	interface.
+    * - ``V4L2_CAP_SLICED_VBI_OUTPUT``
+      - 0x00000080
+      - The device supports the :ref:`Sliced VBI Output <sliced>`
+	interface.
+    * - ``V4L2_CAP_RDS_CAPTURE``
+      - 0x00000100
+      - The device supports the :ref:`RDS <rds>` capture interface.
+    * - ``V4L2_CAP_VIDEO_OUTPUT_OVERLAY``
+      - 0x00000200
+      - The device supports the :ref:`Video Output Overlay <osd>` (OSD)
+	interface. Unlike the *Video Overlay* interface, this is a
+	secondary function of video output devices and overlays an image
+	onto an outgoing video signal. When the driver sets this flag, it
+	must clear the ``V4L2_CAP_VIDEO_OVERLAY`` flag and vice
+	versa. [#f1]_
+    * - ``V4L2_CAP_HW_FREQ_SEEK``
+      - 0x00000400
+      - The device supports the
+	:ref:`VIDIOC_S_HW_FREQ_SEEK` ioctl
+	for hardware frequency seeking.
+    * - ``V4L2_CAP_RDS_OUTPUT``
+      - 0x00000800
+      - The device supports the :ref:`RDS <rds>` output interface.
+    * - ``V4L2_CAP_TUNER``
+      - 0x00010000
+      - The device has some sort of tuner to receive RF-modulated video
+	signals. For more information about tuner programming see
+	:ref:`tuner`.
+    * - ``V4L2_CAP_AUDIO``
+      - 0x00020000
+      - The device has audio inputs or outputs. It may or may not support
+	audio recording or playback, in PCM or compressed formats. PCM
+	audio support must be implemented as ALSA or OSS interface. For
+	more information on audio inputs and outputs see :ref:`audio`.
+    * - ``V4L2_CAP_RADIO``
+      - 0x00040000
+      - This is a radio receiver.
+    * - ``V4L2_CAP_MODULATOR``
+      - 0x00080000
+      - The device has some sort of modulator to emit RF-modulated
+	video/audio signals. For more information about modulator
+	programming see :ref:`tuner`.
+    * - ``V4L2_CAP_SDR_CAPTURE``
+      - 0x00100000
+      - The device supports the :ref:`SDR Capture <sdr>` interface.
+    * - ``V4L2_CAP_EXT_PIX_FORMAT``
+      - 0x00200000
+      - The device supports the struct
+	:c:type:`v4l2_pix_format` extended fields.
+    * - ``V4L2_CAP_SDR_OUTPUT``
+      - 0x00400000
+      - The device supports the :ref:`SDR Output <sdr>` interface.
+    * - ``V4L2_CAP_META_CAPTURE``
+      - 0x00800000
+      - The device supports the :ref:`metadata` capture interface.
+    * - ``V4L2_CAP_READWRITE``
+      - 0x01000000
+      - The device supports the :c:func:`read()` and/or
+	:c:func:`write()` I/O methods.
+    * - ``V4L2_CAP_ASYNCIO``
+      - 0x02000000
+      - The device supports the :ref:`asynchronous <async>` I/O methods.
+    * - ``V4L2_CAP_STREAMING``
+      - 0x04000000
+      - The device supports the :ref:`streaming <mmap>` I/O method.
+    * - ``V4L2_CAP_META_OUTPUT``
+      - 0x08000000
+      - The device supports the :ref:`metadata` output interface.
+    * - ``V4L2_CAP_TOUCH``
+      - 0x10000000
+      - This is a touch device.
+    * - ``V4L2_CAP_IO_MC``
+      - 0x20000000
+      - There is only one input and/or output seen from userspace. The whole
+        video topology configuration, including which I/O entity is routed to
+        the input/output, is configured by userspace via the Media Controller.
+        See :ref:`media_controller`.
+    * - ``V4L2_CAP_DEVICE_CAPS``
+      - 0x80000000
+      - The driver fills the ``device_caps`` field. This capability can
+	only appear in the ``capabilities`` field and never in the
+	``device_caps`` field.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+.. [#f1]
+   The struct :c:type:`v4l2_framebuffer` lacks an
+   enum :c:type:`v4l2_buf_type` field, therefore the
+   type of overlay is implied by the driver capabilities.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
new file mode 100644
index 000000000..9b8716f90
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
@@ -0,0 +1,603 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_QUERYCTRL:
+
+*******************************************************************
+ioctls VIDIOC_QUERYCTRL, VIDIOC_QUERY_EXT_CTRL and VIDIOC_QUERYMENU
+*******************************************************************
+
+Name
+====
+
+VIDIOC_QUERYCTRL - VIDIOC_QUERY_EXT_CTRL - VIDIOC_QUERYMENU - Enumerate controls and menu control items
+
+Synopsis
+========
+
+``int ioctl(int fd, int VIDIOC_QUERYCTRL, struct v4l2_queryctrl *argp)``
+
+.. c:macro:: VIDIOC_QUERY_EXT_CTRL
+
+``int ioctl(int fd, VIDIOC_QUERY_EXT_CTRL, struct v4l2_query_ext_ctrl *argp)``
+
+.. c:macro:: VIDIOC_QUERYMENU
+
+``int ioctl(int fd, VIDIOC_QUERYMENU, struct v4l2_querymenu *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_queryctrl`, :c:type:`v4l2_query_ext_ctrl`
+    or :c:type:`v4l2_querymenu` (depending on the ioctl).
+
+Description
+===========
+
+To query the attributes of a control applications set the ``id`` field
+of a struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` and call the
+``VIDIOC_QUERYCTRL`` ioctl with a pointer to this structure. The driver
+fills the rest of the structure or returns an ``EINVAL`` error code when the
+``id`` is invalid.
+
+It is possible to enumerate controls by calling ``VIDIOC_QUERYCTRL``
+with successive ``id`` values starting from ``V4L2_CID_BASE`` up to and
+exclusive ``V4L2_CID_LASTP1``. Drivers may return ``EINVAL`` if a control in
+this range is not supported. Further applications can enumerate private
+controls, which are not defined in this specification, by starting at
+``V4L2_CID_PRIVATE_BASE`` and incrementing ``id`` until the driver
+returns ``EINVAL``.
+
+In both cases, when the driver sets the ``V4L2_CTRL_FLAG_DISABLED`` flag
+in the ``flags`` field this control is permanently disabled and should
+be ignored by the application. [#f1]_
+
+When the application ORs ``id`` with ``V4L2_CTRL_FLAG_NEXT_CTRL`` the
+driver returns the next supported non-compound control, or ``EINVAL`` if
+there is none. In addition, the ``V4L2_CTRL_FLAG_NEXT_COMPOUND`` flag
+can be specified to enumerate all compound controls (i.e. controls with
+type ≥ ``V4L2_CTRL_COMPOUND_TYPES`` and/or array control, in other words
+controls that contain more than one value). Specify both
+``V4L2_CTRL_FLAG_NEXT_CTRL`` and ``V4L2_CTRL_FLAG_NEXT_COMPOUND`` in
+order to enumerate all controls, compound or not. Drivers which do not
+support these flags yet always return ``EINVAL``.
+
+The ``VIDIOC_QUERY_EXT_CTRL`` ioctl was introduced in order to better
+support controls that can use compound types, and to expose additional
+control information that cannot be returned in struct
+:ref:`v4l2_queryctrl <v4l2-queryctrl>` since that structure is full.
+
+``VIDIOC_QUERY_EXT_CTRL`` is used in the same way as
+``VIDIOC_QUERYCTRL``, except that the ``reserved`` array must be zeroed
+as well.
+
+Additional information is required for menu controls: the names of the
+menu items. To query them applications set the ``id`` and ``index``
+fields of struct :ref:`v4l2_querymenu <v4l2-querymenu>` and call the
+``VIDIOC_QUERYMENU`` ioctl with a pointer to this structure. The driver
+fills the rest of the structure or returns an ``EINVAL`` error code when the
+``id`` or ``index`` is invalid. Menu items are enumerated by calling
+``VIDIOC_QUERYMENU`` with successive ``index`` values from struct
+:ref:`v4l2_queryctrl <v4l2-queryctrl>` ``minimum`` to ``maximum``,
+inclusive.
+
+.. note::
+
+   It is possible for ``VIDIOC_QUERYMENU`` to return
+   an ``EINVAL`` error code for some indices between ``minimum`` and
+   ``maximum``. In that case that particular menu item is not supported by
+   this driver. Also note that the ``minimum`` value is not necessarily 0.
+
+See also the examples in :ref:`control`.
+
+.. tabularcolumns:: |p{1.2cm}|p{3.6cm}|p{12.7cm}|
+
+.. _v4l2-queryctrl:
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_queryctrl
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``id``
+      - Identifies the control, set by the application. See
+	:ref:`control-id` for predefined IDs. When the ID is ORed with
+	V4L2_CTRL_FLAG_NEXT_CTRL the driver clears the flag and
+	returns the first control with a higher ID. Drivers which do not
+	support this flag yet always return an ``EINVAL`` error code.
+    * - __u32
+      - ``type``
+      - Type of control, see :c:type:`v4l2_ctrl_type`.
+    * - __u8
+      - ``name``\ [32]
+      - Name of the control, a NUL-terminated ASCII string. This
+	information is intended for the user.
+    * - __s32
+      - ``minimum``
+      - Minimum value, inclusive. This field gives a lower bound for the
+	control. See enum :c:type:`v4l2_ctrl_type` how
+	the minimum value is to be used for each possible control type.
+	Note that this a signed 32-bit value.
+    * - __s32
+      - ``maximum``
+      - Maximum value, inclusive. This field gives an upper bound for the
+	control. See enum :c:type:`v4l2_ctrl_type` how
+	the maximum value is to be used for each possible control type.
+	Note that this a signed 32-bit value.
+    * - __s32
+      - ``step``
+      - This field gives a step size for the control. See enum
+	:c:type:`v4l2_ctrl_type` how the step value is
+	to be used for each possible control type. Note that this an
+	unsigned 32-bit value.
+
+	Generally drivers should not scale hardware control values. It may
+	be necessary for example when the ``name`` or ``id`` imply a
+	particular unit and the hardware actually accepts only multiples
+	of said unit. If so, drivers must take care values are properly
+	rounded when scaling, such that errors will not accumulate on
+	repeated read-write cycles.
+
+	This field gives the smallest change of an integer control
+	actually affecting hardware. Often the information is needed when
+	the user can change controls by keyboard or GUI buttons, rather
+	than a slider. When for example a hardware register accepts values
+	0-511 and the driver reports 0-65535, step should be 128.
+
+	Note that although signed, the step value is supposed to be always
+	positive.
+    * - __s32
+      - ``default_value``
+      - The default value of a ``V4L2_CTRL_TYPE_INTEGER``, ``_BOOLEAN``,
+	``_BITMASK``, ``_MENU`` or ``_INTEGER_MENU`` control. Not valid
+	for other types of controls.
+
+	.. note::
+
+	   Drivers reset controls to their default value only when
+	   the driver is first loaded, never afterwards.
+    * - __u32
+      - ``flags``
+      - Control flags, see :ref:`control-flags`.
+    * - __u32
+      - ``reserved``\ [2]
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+
+.. tabularcolumns:: |p{1.2cm}|p{5.0cm}|p{11.3cm}|
+
+.. _v4l2-query-ext-ctrl:
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_query_ext_ctrl
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``id``
+      - Identifies the control, set by the application. See
+	:ref:`control-id` for predefined IDs. When the ID is ORed with
+	``V4L2_CTRL_FLAG_NEXT_CTRL`` the driver clears the flag and
+	returns the first non-compound control with a higher ID. When the
+	ID is ORed with ``V4L2_CTRL_FLAG_NEXT_COMPOUND`` the driver clears
+	the flag and returns the first compound control with a higher ID.
+	Set both to get the first control (compound or not) with a higher
+	ID.
+    * - __u32
+      - ``type``
+      - Type of control, see :c:type:`v4l2_ctrl_type`.
+    * - char
+      - ``name``\ [32]
+      - Name of the control, a NUL-terminated ASCII string. This
+	information is intended for the user.
+    * - __s64
+      - ``minimum``
+      - Minimum value, inclusive. This field gives a lower bound for the
+	control. See enum :c:type:`v4l2_ctrl_type` how
+	the minimum value is to be used for each possible control type.
+	Note that this a signed 64-bit value.
+    * - __s64
+      - ``maximum``
+      - Maximum value, inclusive. This field gives an upper bound for the
+	control. See enum :c:type:`v4l2_ctrl_type` how
+	the maximum value is to be used for each possible control type.
+	Note that this a signed 64-bit value.
+    * - __u64
+      - ``step``
+      - This field gives a step size for the control. See enum
+	:c:type:`v4l2_ctrl_type` how the step value is
+	to be used for each possible control type. Note that this an
+	unsigned 64-bit value.
+
+	Generally drivers should not scale hardware control values. It may
+	be necessary for example when the ``name`` or ``id`` imply a
+	particular unit and the hardware actually accepts only multiples
+	of said unit. If so, drivers must take care values are properly
+	rounded when scaling, such that errors will not accumulate on
+	repeated read-write cycles.
+
+	This field gives the smallest change of an integer control
+	actually affecting hardware. Often the information is needed when
+	the user can change controls by keyboard or GUI buttons, rather
+	than a slider. When for example a hardware register accepts values
+	0-511 and the driver reports 0-65535, step should be 128.
+    * - __s64
+      - ``default_value``
+      - The default value of a ``V4L2_CTRL_TYPE_INTEGER``, ``_INTEGER64``,
+	``_BOOLEAN``, ``_BITMASK``, ``_MENU``, ``_INTEGER_MENU``, ``_U8``
+	or ``_U16`` control. Not valid for other types of controls.
+
+	.. note::
+
+	   Drivers reset controls to their default value only when
+	   the driver is first loaded, never afterwards.
+    * - __u32
+      - ``flags``
+      - Control flags, see :ref:`control-flags`.
+    * - __u32
+      - ``elem_size``
+      - The size in bytes of a single element of the array. Given a char
+	pointer ``p`` to a 3-dimensional array you can find the position
+	of cell ``(z, y, x)`` as follows:
+	``p + ((z * dims[1] + y) * dims[0] + x) * elem_size``.
+	``elem_size`` is always valid, also when the control isn't an
+	array. For string controls ``elem_size`` is equal to
+	``maximum + 1``.
+    * - __u32
+      - ``elems``
+      - The number of elements in the N-dimensional array. If this control
+	is not an array, then ``elems`` is 1. The ``elems`` field can
+	never be 0.
+    * - __u32
+      - ``nr_of_dims``
+      - The number of dimension in the N-dimensional array. If this
+	control is not an array, then this field is 0.
+    * - __u32
+      - ``dims[V4L2_CTRL_MAX_DIMS]``
+      - The size of each dimension. The first ``nr_of_dims`` elements of
+	this array must be non-zero, all remaining elements must be zero.
+    * - __u32
+      - ``reserved``\ [32]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+
+.. tabularcolumns:: |p{1.2cm}|p{1.0cm}|p{1.7cm}|p{13.0cm}|
+
+.. _v4l2-querymenu:
+
+.. flat-table:: struct v4l2_querymenu
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``id``
+      - Identifies the control, set by the application from the respective
+	struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` ``id``.
+    * - __u32
+      - ``index``
+      - Index of the menu item, starting at zero, set by the application.
+    * - union {
+      - (anonymous)
+    * - __u8
+      - ``name``\ [32]
+      - Name of the menu item, a NUL-terminated ASCII string. This
+	information is intended for the user. This field is valid for
+	``V4L2_CTRL_TYPE_MENU`` type controls.
+    * - __s64
+      - ``value``
+      - Value of the integer menu item. This field is valid for
+	``V4L2_CTRL_TYPE_INTEGER_MENU`` type controls.
+    * - }
+      -
+    * - __u32
+      - ``reserved``
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+
+.. tabularcolumns:: |p{5.8cm}|p{1.4cm}|p{1.0cm}|p{1.4cm}|p{6.9cm}|
+
+.. c:type:: v4l2_ctrl_type
+
+.. cssclass:: longtable
+
+.. flat-table:: enum v4l2_ctrl_type
+    :header-rows:  1
+    :stub-columns: 0
+    :widths:       30 5 5 5 55
+
+    * - Type
+      - ``minimum``
+      - ``step``
+      - ``maximum``
+      - Description
+    * - ``V4L2_CTRL_TYPE_INTEGER``
+      - any
+      - any
+      - any
+      - An integer-valued control ranging from minimum to maximum
+	inclusive. The step value indicates the increment between values.
+    * - ``V4L2_CTRL_TYPE_BOOLEAN``
+      - 0
+      - 1
+      - 1
+      - A boolean-valued control. Zero corresponds to "disabled", and one
+	means "enabled".
+    * - ``V4L2_CTRL_TYPE_MENU``
+      - ≥ 0
+      - 1
+      - N-1
+      - The control has a menu of N choices. The names of the menu items
+	can be enumerated with the ``VIDIOC_QUERYMENU`` ioctl.
+    * - ``V4L2_CTRL_TYPE_INTEGER_MENU``
+      - ≥ 0
+      - 1
+      - N-1
+      - The control has a menu of N choices. The values of the menu items
+	can be enumerated with the ``VIDIOC_QUERYMENU`` ioctl. This is
+	similar to ``V4L2_CTRL_TYPE_MENU`` except that instead of strings,
+	the menu items are signed 64-bit integers.
+    * - ``V4L2_CTRL_TYPE_BITMASK``
+      - 0
+      - n/a
+      - any
+      - A bitmask field. The maximum value is the set of bits that can be
+	used, all other bits are to be 0. The maximum value is interpreted
+	as a __u32, allowing the use of bit 31 in the bitmask.
+    * - ``V4L2_CTRL_TYPE_BUTTON``
+      - 0
+      - 0
+      - 0
+      - A control which performs an action when set. Drivers must ignore
+	the value passed with ``VIDIOC_S_CTRL`` and return an ``EACCES`` error
+	code on a ``VIDIOC_G_CTRL`` attempt.
+    * - ``V4L2_CTRL_TYPE_INTEGER64``
+      - any
+      - any
+      - any
+      - A 64-bit integer valued control. Minimum, maximum and step size
+	cannot be queried using ``VIDIOC_QUERYCTRL``. Only
+	``VIDIOC_QUERY_EXT_CTRL`` can retrieve the 64-bit min/max/step
+	values, they should be interpreted as n/a when using
+	``VIDIOC_QUERYCTRL``.
+    * - ``V4L2_CTRL_TYPE_STRING``
+      - ≥ 0
+      - ≥ 1
+      - ≥ 0
+      - The minimum and maximum string lengths. The step size means that
+	the string must be (minimum + N * step) characters long for N ≥ 0.
+	These lengths do not include the terminating zero, so in order to
+	pass a string of length 8 to
+	:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` you need to
+	set the ``size`` field of struct
+	:c:type:`v4l2_ext_control` to 9. For
+	:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` you can set
+	the ``size`` field to ``maximum`` + 1. Which character encoding is
+	used will depend on the string control itself and should be part
+	of the control documentation.
+    * - ``V4L2_CTRL_TYPE_CTRL_CLASS``
+      - n/a
+      - n/a
+      - n/a
+      - This is not a control. When ``VIDIOC_QUERYCTRL`` is called with a
+	control ID equal to a control class code (see :ref:`ctrl-class`)
+	+ 1, the ioctl returns the name of the control class and this
+	control type. Older drivers which do not support this feature
+	return an ``EINVAL`` error code.
+    * - ``V4L2_CTRL_TYPE_U8``
+      - any
+      - any
+      - any
+      - An unsigned 8-bit valued control ranging from minimum to maximum
+	inclusive. The step value indicates the increment between values.
+    * - ``V4L2_CTRL_TYPE_U16``
+      - any
+      - any
+      - any
+      - An unsigned 16-bit valued control ranging from minimum to maximum
+	inclusive. The step value indicates the increment between values.
+    * - ``V4L2_CTRL_TYPE_U32``
+      - any
+      - any
+      - any
+      - An unsigned 32-bit valued control ranging from minimum to maximum
+	inclusive. The step value indicates the increment between values.
+    * - ``V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_mpeg2_slice_params`, containing MPEG-2
+	slice parameters for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_MPEG2_QUANTIZATION``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_mpeg2_quantization`, containing MPEG-2
+	quantization matrices for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_AREA``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_area`, containing the width and the height
+        of a rectangular area. Units depend on the use case.
+    * - ``V4L2_CTRL_TYPE_H264_SPS``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_h264_sps`, containing H264
+	sequence parameters for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_H264_PPS``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_h264_pps`, containing H264
+	picture parameters for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_H264_SCALING_MATRIX``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_h264_scaling_matrix`, containing H264
+	scaling matrices for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_H264_SLICE_PARAMS``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_h264_slice_params`, containing H264
+	slice parameters for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_H264_DECODE_PARAMS``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_h264_decode_params`, containing H264
+	decode parameters for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_HEVC_SPS``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_hevc_sps`, containing HEVC Sequence
+	Parameter Set for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_HEVC_PPS``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_hevc_pps`, containing HEVC Picture
+	Parameter Set for stateless video decoders.
+    * - ``V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_hevc_slice_params`, containing HEVC
+	slice parameters for stateless video decoders.
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _control-flags:
+
+.. cssclass:: longtable
+
+.. flat-table:: Control Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_CTRL_FLAG_DISABLED``
+      - 0x0001
+      - This control is permanently disabled and should be ignored by the
+	application. Any attempt to change the control will result in an
+	``EINVAL`` error code.
+    * - ``V4L2_CTRL_FLAG_GRABBED``
+      - 0x0002
+      - This control is temporarily unchangeable, for example because
+	another application took over control of the respective resource.
+	Such controls may be displayed specially in a user interface.
+	Attempts to change the control may result in an ``EBUSY`` error code.
+    * - ``V4L2_CTRL_FLAG_READ_ONLY``
+      - 0x0004
+      - This control is permanently readable only. Any attempt to change
+	the control will result in an ``EINVAL`` error code.
+    * - ``V4L2_CTRL_FLAG_UPDATE``
+      - 0x0008
+      - A hint that changing this control may affect the value of other
+	controls within the same control class. Applications should update
+	their user interface accordingly.
+    * - ``V4L2_CTRL_FLAG_INACTIVE``
+      - 0x0010
+      - This control is not applicable to the current configuration and
+	should be displayed accordingly in a user interface. For example
+	the flag may be set on a MPEG audio level 2 bitrate control when
+	MPEG audio encoding level 1 was selected with another control.
+    * - ``V4L2_CTRL_FLAG_SLIDER``
+      - 0x0020
+      - A hint that this control is best represented as a slider-like
+	element in a user interface.
+    * - ``V4L2_CTRL_FLAG_WRITE_ONLY``
+      - 0x0040
+      - This control is permanently writable only. Any attempt to read the
+	control will result in an ``EACCES`` error code error code. This flag
+	is typically present for relative controls or action controls
+	where writing a value will cause the device to carry out a given
+	action (e. g. motor control) but no meaningful value can be
+	returned.
+    * - ``V4L2_CTRL_FLAG_VOLATILE``
+      - 0x0080
+      - This control is volatile, which means that the value of the
+	control changes continuously. A typical example would be the
+	current gain value if the device is in auto-gain mode. In such a
+	case the hardware calculates the gain value based on the lighting
+	conditions which can change over time.
+
+	.. note::
+
+	   Setting a new value for a volatile control will be ignored
+	   unless
+	   :ref:`V4L2_CTRL_FLAG_EXECUTE_ON_WRITE <FLAG_EXECUTE_ON_WRITE>`
+	   is also set.
+	   Setting a new value for a volatile control will *never* trigger a
+	   :ref:`V4L2_EVENT_CTRL_CH_VALUE <ctrl-changes-flags>` event.
+    * - ``V4L2_CTRL_FLAG_HAS_PAYLOAD``
+      - 0x0100
+      - This control has a pointer type, so its value has to be accessed
+	using one of the pointer fields of struct
+	:c:type:`v4l2_ext_control`. This flag is set
+	for controls that are an array, string, or have a compound type.
+	In all cases you have to set a pointer to memory containing the
+	payload of the control.
+    * .. _FLAG_EXECUTE_ON_WRITE:
+
+      - ``V4L2_CTRL_FLAG_EXECUTE_ON_WRITE``
+      - 0x0200
+      - The value provided to the control will be propagated to the driver
+	even if it remains constant. This is required when the control
+	represents an action on the hardware. For example: clearing an
+	error flag or triggering the flash. All the controls of the type
+	``V4L2_CTRL_TYPE_BUTTON`` have this flag set.
+    * .. _FLAG_MODIFY_LAYOUT:
+
+      - ``V4L2_CTRL_FLAG_MODIFY_LAYOUT``
+      - 0x0400
+      - Changing this control value may modify the layout of the
+        buffer (for video devices) or the media bus format (for sub-devices).
+
+	A typical example would be the ``V4L2_CID_ROTATE`` control.
+
+	Note that typically controls with this flag will also set the
+	``V4L2_CTRL_FLAG_GRABBED`` flag when buffers are allocated or
+	streaming is in progress since most drivers do not support changing
+	the format in that case.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` ``id`` is
+    invalid. The struct :ref:`v4l2_querymenu <v4l2-querymenu>` ``id``
+    is invalid or ``index`` is out of range (less than ``minimum`` or
+    greater than ``maximum``) or this particular menu item is not
+    supported by the driver.
+
+EACCES
+    An attempt was made to read a write-only control.
+
+.. [#f1]
+   ``V4L2_CTRL_FLAG_DISABLED`` was intended for two purposes: Drivers
+   can skip predefined controls not supported by the hardware (although
+   returning ``EINVAL`` would do as well), or disable predefined and private
+   controls after hardware detection without the trouble of reordering
+   control arrays and indices (``EINVAL`` cannot be used to skip private
+   controls because it would prematurely end the enumeration).
diff --git a/Documentation/userspace-api/media/v4l/vidioc-querystd.rst b/Documentation/userspace-api/media/v4l/vidioc-querystd.rst
new file mode 100644
index 000000000..4a88287d8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-querystd.rst
@@ -0,0 +1,69 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_QUERYSTD:
+
+*********************************************
+ioctl VIDIOC_QUERYSTD, VIDIOC_SUBDEV_QUERYSTD
+*********************************************
+
+Name
+====
+
+VIDIOC_QUERYSTD - VIDIOC_SUBDEV_QUERYSTD - Sense the video standard received by the current input
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_QUERYSTD
+
+``int ioctl(int fd, VIDIOC_QUERYSTD, v4l2_std_id *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_QUERYSTD
+
+``int ioctl(int fd, VIDIOC_SUBDEV_QUERYSTD, v4l2_std_id *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to :c:type:`v4l2_std_id`.
+
+Description
+===========
+
+The hardware may be able to detect the current video standard
+automatically. To do so, applications call :ref:`VIDIOC_QUERYSTD` with a
+pointer to a :ref:`v4l2_std_id <v4l2-std-id>` type. The driver
+stores here a set of candidates, this can be a single flag or a set of
+supported standards if for example the hardware can only distinguish
+between 50 and 60 Hz systems. If no signal was detected, then the driver
+will return V4L2_STD_UNKNOWN. When detection is not possible or fails,
+the set must contain all standards supported by the current video input
+or output.
+
+.. note::
+
+   Drivers shall *not* switch the video standard
+   automatically if a new video standard is detected. Instead, drivers
+   should send the ``V4L2_EVENT_SOURCE_CHANGE`` event (if they support
+   this) and expect that userspace will take action by calling
+   :ref:`VIDIOC_QUERYSTD`. The reason is that a new video standard can mean
+   different buffer sizes as well, and you cannot change buffer sizes on
+   the fly. In general, applications that receive the Source Change event
+   will have to call :ref:`VIDIOC_QUERYSTD`, and if the detected video
+   standard is valid they will have to stop streaming, set the new
+   standard, allocate new buffers and start streaming again.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+ENODATA
+    Standard video timings are not supported for this input or output.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst b/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst
new file mode 100644
index 000000000..c1c88e00b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst
@@ -0,0 +1,169 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_REQBUFS:
+
+********************
+ioctl VIDIOC_REQBUFS
+********************
+
+Name
+====
+
+VIDIOC_REQBUFS - Initiate Memory Mapping, User Pointer I/O or DMA buffer I/O
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_REQBUFS
+
+``int ioctl(int fd, VIDIOC_REQBUFS, struct v4l2_requestbuffers *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_requestbuffers`.
+
+Description
+===========
+
+This ioctl is used to initiate :ref:`memory mapped <mmap>`,
+:ref:`user pointer <userp>` or :ref:`DMABUF <dmabuf>` based I/O.
+Memory mapped buffers are located in device memory and must be allocated
+with this ioctl before they can be mapped into the application's address
+space. User buffers are allocated by applications themselves, and this
+ioctl is merely used to switch the driver into user pointer I/O mode and
+to setup some internal structures. Similarly, DMABUF buffers are
+allocated by applications through a device driver, and this ioctl only
+configures the driver into DMABUF I/O mode without performing any direct
+allocation.
+
+To allocate device buffers applications initialize all fields of the
+struct :c:type:`v4l2_requestbuffers` structure. They set the ``type``
+field to the respective stream or buffer type, the ``count`` field to
+the desired number of buffers, ``memory`` must be set to the requested
+I/O method and the ``reserved`` array must be zeroed. When the ioctl is
+called with a pointer to this structure the driver will attempt to
+allocate the requested number of buffers and it stores the actual number
+allocated in the ``count`` field. It can be smaller than the number
+requested, even zero, when the driver runs out of free memory. A larger
+number is also possible when the driver requires more buffers to
+function correctly. For example video output requires at least two
+buffers, one displayed and one filled by the application.
+
+When the I/O method is not supported the ioctl returns an ``EINVAL`` error
+code.
+
+Applications can call :ref:`VIDIOC_REQBUFS` again to change the number of
+buffers. Note that if any buffers are still mapped or exported via DMABUF,
+then :ref:`VIDIOC_REQBUFS` can only succeed if the
+``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS`` capability is set. Otherwise
+:ref:`VIDIOC_REQBUFS` will return the ``EBUSY`` error code.
+If ``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS`` is set, then these buffers are
+orphaned and will be freed when they are unmapped or when the exported DMABUF
+fds are closed. A ``count`` value of zero frees or orphans all buffers, after
+aborting or finishing any DMA in progress, an implicit
+:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`.
+
+.. c:type:: v4l2_requestbuffers
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_requestbuffers
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``count``
+      - The number of buffers requested or granted.
+    * - __u32
+      - ``type``
+      - Type of the stream or buffers, this is the same as the struct
+	:c:type:`v4l2_format` ``type`` field. See
+	:c:type:`v4l2_buf_type` for valid values.
+    * - __u32
+      - ``memory``
+      - Applications set this field to ``V4L2_MEMORY_MMAP``,
+	``V4L2_MEMORY_DMABUF`` or ``V4L2_MEMORY_USERPTR``. See
+	:c:type:`v4l2_memory`.
+    * - __u32
+      - ``capabilities``
+      - Set by the driver. If 0, then the driver doesn't support
+        capabilities. In that case all you know is that the driver is
+	guaranteed to support ``V4L2_MEMORY_MMAP`` and *might* support
+	other :c:type:`v4l2_memory` types. It will not support any other
+	capabilities.
+
+	If you want to query the capabilities with a minimum of side-effects,
+	then this can be called with ``count`` set to 0, ``memory`` set to
+	``V4L2_MEMORY_MMAP`` and ``type`` set to the buffer type. This will
+	free any previously allocated buffers, so this is typically something
+	that will be done at the start of the application.
+    * - __u32
+      - ``reserved``\ [1]
+      - A place holder for future extensions. Drivers and applications
+	must set the array to zero.
+
+.. tabularcolumns:: |p{6.1cm}|p{2.2cm}|p{8.7cm}|
+
+.. _v4l2-buf-capabilities:
+.. _V4L2-BUF-CAP-SUPPORTS-MMAP:
+.. _V4L2-BUF-CAP-SUPPORTS-USERPTR:
+.. _V4L2-BUF-CAP-SUPPORTS-DMABUF:
+.. _V4L2-BUF-CAP-SUPPORTS-REQUESTS:
+.. _V4L2-BUF-CAP-SUPPORTS-ORPHANED-BUFS:
+.. _V4L2-BUF-CAP-SUPPORTS-M2M-HOLD-CAPTURE-BUF:
+.. _V4L2-BUF-CAP-SUPPORTS-MMAP-CACHE-HINTS:
+
+.. cssclass:: longtable
+
+.. flat-table:: V4L2 Buffer Capabilities Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_BUF_CAP_SUPPORTS_MMAP``
+      - 0x00000001
+      - This buffer type supports the ``V4L2_MEMORY_MMAP`` streaming mode.
+    * - ``V4L2_BUF_CAP_SUPPORTS_USERPTR``
+      - 0x00000002
+      - This buffer type supports the ``V4L2_MEMORY_USERPTR`` streaming mode.
+    * - ``V4L2_BUF_CAP_SUPPORTS_DMABUF``
+      - 0x00000004
+      - This buffer type supports the ``V4L2_MEMORY_DMABUF`` streaming mode.
+    * - ``V4L2_BUF_CAP_SUPPORTS_REQUESTS``
+      - 0x00000008
+      - This buffer type supports :ref:`requests <media-request-api>`.
+    * - ``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS``
+      - 0x00000010
+      - The kernel allows calling :ref:`VIDIOC_REQBUFS` while buffers are still
+        mapped or exported via DMABUF. These orphaned buffers will be freed
+        when they are unmapped or when the exported DMABUF fds are closed.
+    * - ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF``
+      - 0x00000020
+      - Only valid for stateless decoders. If set, then userspace can set the
+        ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag to hold off on returning the
+	capture buffer until the OUTPUT timestamp changes.
+    * - ``V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS``
+      - 0x00000040
+      - This capability is set by the driver to indicate that the queue supports
+        cache and memory management hints. However, it's only valid when the
+        queue is used for :ref:`memory mapping <mmap>` streaming I/O. See
+        :ref:`V4L2_BUF_FLAG_NO_CACHE_INVALIDATE <V4L2-BUF-FLAG-NO-CACHE-INVALIDATE>` and
+        :ref:`V4L2_BUF_FLAG_NO_CACHE_CLEAN <V4L2-BUF-FLAG-NO-CACHE-CLEAN>`.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The buffer type (``type`` field) or the requested I/O method
+    (``memory``) is not supported.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-s-hw-freq-seek.rst b/Documentation/userspace-api/media/v4l/vidioc-s-hw-freq-seek.rst
new file mode 100644
index 000000000..1948f31c2
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-s-hw-freq-seek.rst
@@ -0,0 +1,137 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_S_HW_FREQ_SEEK:
+
+***************************
+ioctl VIDIOC_S_HW_FREQ_SEEK
+***************************
+
+Name
+====
+
+VIDIOC_S_HW_FREQ_SEEK - Perform a hardware frequency seek
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_S_HW_FREQ_SEEK
+
+``int ioctl(int fd, VIDIOC_S_HW_FREQ_SEEK, struct v4l2_hw_freq_seek *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_hw_freq_seek`.
+
+Description
+===========
+
+Start a hardware frequency seek from the current frequency. To do this
+applications initialize the ``tuner``, ``type``, ``seek_upward``,
+``wrap_around``, ``spacing``, ``rangelow`` and ``rangehigh`` fields, and
+zero out the ``reserved`` array of a struct
+:c:type:`v4l2_hw_freq_seek` and call the
+``VIDIOC_S_HW_FREQ_SEEK`` ioctl with a pointer to this structure.
+
+The ``rangelow`` and ``rangehigh`` fields can be set to a non-zero value
+to tell the driver to search a specific band. If the struct
+:c:type:`v4l2_tuner` ``capability`` field has the
+``V4L2_TUNER_CAP_HWSEEK_PROG_LIM`` flag set, these values must fall
+within one of the bands returned by
+:ref:`VIDIOC_ENUM_FREQ_BANDS`. If the
+``V4L2_TUNER_CAP_HWSEEK_PROG_LIM`` flag is not set, then these values
+must exactly match those of one of the bands returned by
+:ref:`VIDIOC_ENUM_FREQ_BANDS`. If the
+current frequency of the tuner does not fall within the selected band it
+will be clamped to fit in the band before the seek is started.
+
+If an error is returned, then the original frequency will be restored.
+
+This ioctl is supported if the ``V4L2_CAP_HW_FREQ_SEEK`` capability is
+set.
+
+If this ioctl is called from a non-blocking filehandle, then ``EAGAIN``
+error code is returned and no seek takes place.
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_hw_freq_seek
+
+.. flat-table:: struct v4l2_hw_freq_seek
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``tuner``
+      - The tuner index number. This is the same value as in the struct
+	:c:type:`v4l2_input` ``tuner`` field and the struct
+	:c:type:`v4l2_tuner` ``index`` field.
+    * - __u32
+      - ``type``
+      - The tuner type. This is the same value as in the struct
+	:c:type:`v4l2_tuner` ``type`` field. See
+	:c:type:`v4l2_tuner_type`
+    * - __u32
+      - ``seek_upward``
+      - If non-zero, seek upward from the current frequency, else seek
+	downward.
+    * - __u32
+      - ``wrap_around``
+      - If non-zero, wrap around when at the end of the frequency range,
+	else stop seeking. The struct :c:type:`v4l2_tuner`
+	``capability`` field will tell you what the hardware supports.
+    * - __u32
+      - ``spacing``
+      - If non-zero, defines the hardware seek resolution in Hz. The
+	driver selects the nearest value that is supported by the device.
+	If spacing is zero a reasonable default value is used.
+    * - __u32
+      - ``rangelow``
+      - If non-zero, the lowest tunable frequency of the band to search in
+	units of 62.5 kHz, or if the struct
+	:c:type:`v4l2_tuner` ``capability`` field has the
+	``V4L2_TUNER_CAP_LOW`` flag set, in units of 62.5 Hz or if the
+	struct :c:type:`v4l2_tuner` ``capability`` field has
+	the ``V4L2_TUNER_CAP_1HZ`` flag set, in units of 1 Hz. If
+	``rangelow`` is zero a reasonable default value is used.
+    * - __u32
+      - ``rangehigh``
+      - If non-zero, the highest tunable frequency of the band to search
+	in units of 62.5 kHz, or if the struct
+	:c:type:`v4l2_tuner` ``capability`` field has the
+	``V4L2_TUNER_CAP_LOW`` flag set, in units of 62.5 Hz or if the
+	struct :c:type:`v4l2_tuner` ``capability`` field has
+	the ``V4L2_TUNER_CAP_1HZ`` flag set, in units of 1 Hz. If
+	``rangehigh`` is zero a reasonable default value is used.
+    * - __u32
+      - ``reserved``\ [5]
+      - Reserved for future extensions. Applications must set the array to
+	zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The ``tuner`` index is out of bounds, the ``wrap_around`` value is
+    not supported or one of the values in the ``type``, ``rangelow`` or
+    ``rangehigh`` fields is wrong.
+
+EAGAIN
+    Attempted to call ``VIDIOC_S_HW_FREQ_SEEK`` with the filehandle in
+    non-blocking mode.
+
+ENODATA
+    The hardware seek found no channels.
+
+EBUSY
+    Another hardware seek is already in progress.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-streamon.rst b/Documentation/userspace-api/media/v4l/vidioc-streamon.rst
new file mode 100644
index 000000000..0bc86f069
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-streamon.rst
@@ -0,0 +1,106 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_STREAMON:
+
+***************************************
+ioctl VIDIOC_STREAMON, VIDIOC_STREAMOFF
+***************************************
+
+Name
+====
+
+VIDIOC_STREAMON - VIDIOC_STREAMOFF - Start or stop streaming I/O
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_STREAMON
+
+``int ioctl(int fd, VIDIOC_STREAMON, const int *argp)``
+
+.. c:macro:: VIDIOC_STREAMOFF
+
+``int ioctl(int fd, VIDIOC_STREAMOFF, const int *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to an integer.
+
+Description
+===========
+
+The ``VIDIOC_STREAMON`` and ``VIDIOC_STREAMOFF`` ioctl start and stop
+the capture or output process during streaming
+(:ref:`memory mapping <mmap>`, :ref:`user pointer <userp>` or
+:ref:`DMABUF <dmabuf>`) I/O.
+
+Capture hardware is disabled and no input buffers are filled (if there
+are any empty buffers in the incoming queue) until ``VIDIOC_STREAMON``
+has been called. Output hardware is disabled and no video signal is
+produced until ``VIDIOC_STREAMON`` has been called. The ioctl will
+succeed when at least one output buffer is in the incoming queue.
+
+Memory-to-memory devices will not start until ``VIDIOC_STREAMON`` has
+been called for both the capture and output stream types.
+
+If ``VIDIOC_STREAMON`` fails then any already queued buffers will remain
+queued.
+
+The ``VIDIOC_STREAMOFF`` ioctl, apart of aborting or finishing any DMA
+in progress, unlocks any user pointer buffers locked in physical memory,
+and it removes all buffers from the incoming and outgoing queues. That
+means all images captured but not dequeued yet will be lost, likewise
+all images enqueued for output but not transmitted yet. I/O returns to
+the same state as after calling
+:ref:`VIDIOC_REQBUFS` and can be restarted
+accordingly.
+
+If buffers have been queued with :ref:`VIDIOC_QBUF` and
+``VIDIOC_STREAMOFF`` is called without ever having called
+``VIDIOC_STREAMON``, then those queued buffers will also be removed from
+the incoming queue and all are returned to the same state as after
+calling :ref:`VIDIOC_REQBUFS` and can be restarted
+accordingly.
+
+Both ioctls take a pointer to an integer, the desired buffer or stream
+type. This is the same as struct
+:c:type:`v4l2_requestbuffers` ``type``.
+
+If ``VIDIOC_STREAMON`` is called when streaming is already in progress,
+or if ``VIDIOC_STREAMOFF`` is called when streaming is already stopped,
+then 0 is returned. Nothing happens in the case of ``VIDIOC_STREAMON``,
+but ``VIDIOC_STREAMOFF`` will return queued buffers to their starting
+state as mentioned above.
+
+.. note::
+
+   Applications can be preempted for unknown periods right before
+   or after the ``VIDIOC_STREAMON`` or ``VIDIOC_STREAMOFF`` calls, there is
+   no notion of starting or stopping "now". Buffer timestamps can be used
+   to synchronize with other events.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The buffer ``type`` is not supported, or no buffers have been
+    allocated (memory mapping) or enqueued (output) yet.
+
+EPIPE
+    The driver implements
+    :ref:`pad-level format configuration <pad-level-formats>` and the
+    pipeline configuration is invalid.
+
+ENOLINK
+    The driver implements Media Controller interface and the pipeline
+    link configuration is invalid.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-frame-interval.rst b/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-frame-interval.rst
new file mode 100644
index 000000000..17acf3fd8
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-frame-interval.rst
@@ -0,0 +1,111 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL:
+
+***************************************
+ioctl VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL
+***************************************
+
+Name
+====
+
+VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL - Enumerate frame intervals
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL
+
+``int ioctl(int fd, VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL, struct v4l2_subdev_frame_interval_enum * argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_subdev_frame_interval_enum`.
+
+Description
+===========
+
+This ioctl lets applications enumerate available frame intervals on a
+given sub-device pad. Frame intervals only makes sense for sub-devices
+that can control the frame period on their own. This includes, for
+instance, image sensors and TV tuners.
+
+For the common use case of image sensors, the frame intervals available
+on the sub-device output pad depend on the frame format and size on the
+same pad. Applications must thus specify the desired format and size
+when enumerating frame intervals.
+
+To enumerate frame intervals applications initialize the ``index``,
+``pad``, ``which``, ``code``, ``width`` and ``height`` fields of struct
+:c:type:`v4l2_subdev_frame_interval_enum`
+and call the :ref:`VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL` ioctl with a pointer
+to this structure. Drivers fill the rest of the structure or return an
+EINVAL error code if one of the input fields is invalid. All frame
+intervals are enumerable by beginning at index zero and incrementing by
+one until ``EINVAL`` is returned.
+
+Available frame intervals may depend on the current 'try' formats at
+other pads of the sub-device, as well as on the current active links.
+See :ref:`VIDIOC_SUBDEV_G_FMT` for more
+information about the try formats.
+
+Sub-devices that support the frame interval enumeration ioctl should
+implemented it on a single pad only. Its behaviour when supported on
+multiple pads of the same sub-device is not defined.
+
+.. c:type:: v4l2_subdev_frame_interval_enum
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_subdev_frame_interval_enum
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Number of the format in the enumeration, set by the application.
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media controller API.
+    * - __u32
+      - ``code``
+      - The media bus format code, as defined in
+	:ref:`v4l2-mbus-format`.
+    * - __u32
+      - ``width``
+      - Frame width, in pixels.
+    * - __u32
+      - ``height``
+      - Frame height, in pixels.
+    * - struct :c:type:`v4l2_fract`
+      - ``interval``
+      - Period, in seconds, between consecutive video frames.
+    * - __u32
+      - ``which``
+      - Frame intervals to be enumerated, from enum
+	:ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`.
+    * - __u32
+      - ``reserved``\ [8]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct
+    :c:type:`v4l2_subdev_frame_interval_enum`
+    ``pad`` references a non-existing pad, one of the ``code``,
+    ``width`` or ``height`` fields are invalid for the given pad or the
+    ``index`` field is out of bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-frame-size.rst b/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-frame-size.rst
new file mode 100644
index 000000000..8016fba70
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-frame-size.rst
@@ -0,0 +1,115 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBDEV_ENUM_FRAME_SIZE:
+
+***********************************
+ioctl VIDIOC_SUBDEV_ENUM_FRAME_SIZE
+***********************************
+
+Name
+====
+
+VIDIOC_SUBDEV_ENUM_FRAME_SIZE - Enumerate media bus frame sizes
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBDEV_ENUM_FRAME_SIZE
+
+``int ioctl(int fd, VIDIOC_SUBDEV_ENUM_FRAME_SIZE, struct v4l2_subdev_frame_size_enum * argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_subdev_frame_size_enum`.
+
+Description
+===========
+
+This ioctl allows applications to enumerate all frame sizes supported by
+a sub-device on the given pad for the given media bus format. Supported
+formats can be retrieved with the
+:ref:`VIDIOC_SUBDEV_ENUM_MBUS_CODE`
+ioctl.
+
+To enumerate frame sizes applications initialize the ``pad``, ``which``
+, ``code`` and ``index`` fields of the struct
+:c:type:`v4l2_subdev_mbus_code_enum` and
+call the :ref:`VIDIOC_SUBDEV_ENUM_FRAME_SIZE` ioctl with a pointer to the
+structure. Drivers fill the minimum and maximum frame sizes or return an
+EINVAL error code if one of the input parameters is invalid.
+
+Sub-devices that only support discrete frame sizes (such as most
+sensors) will return one or more frame sizes with identical minimum and
+maximum values.
+
+Not all possible sizes in given [minimum, maximum] ranges need to be
+supported. For instance, a scaler that uses a fixed-point scaling ratio
+might not be able to produce every frame size between the minimum and
+maximum values. Applications must use the
+:ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` ioctl to try the
+sub-device for an exact supported frame size.
+
+Available frame sizes may depend on the current 'try' formats at other
+pads of the sub-device, as well as on the current active links and the
+current values of V4L2 controls. See
+:ref:`VIDIOC_SUBDEV_G_FMT` for more
+information about try formats.
+
+.. c:type:: v4l2_subdev_frame_size_enum
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_subdev_frame_size_enum
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``index``
+      - Number of the format in the enumeration, set by the application.
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media controller API.
+    * - __u32
+      - ``code``
+      - The media bus format code, as defined in
+	:ref:`v4l2-mbus-format`.
+    * - __u32
+      - ``min_width``
+      - Minimum frame width, in pixels.
+    * - __u32
+      - ``max_width``
+      - Maximum frame width, in pixels.
+    * - __u32
+      - ``min_height``
+      - Minimum frame height, in pixels.
+    * - __u32
+      - ``max_height``
+      - Maximum frame height, in pixels.
+    * - __u32
+      - ``which``
+      - Frame sizes to be enumerated, from enum
+	:ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`.
+    * - __u32
+      - ``reserved``\ [8]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct
+    :c:type:`v4l2_subdev_frame_size_enum`
+    ``pad`` references a non-existing pad, the ``code`` is invalid for
+    the given pad or the ``index`` field is out of bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-mbus-code.rst b/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-mbus-code.rst
new file mode 100644
index 000000000..1fd950e34
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subdev-enum-mbus-code.rst
@@ -0,0 +1,138 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBDEV_ENUM_MBUS_CODE:
+
+**********************************
+ioctl VIDIOC_SUBDEV_ENUM_MBUS_CODE
+**********************************
+
+Name
+====
+
+VIDIOC_SUBDEV_ENUM_MBUS_CODE - Enumerate media bus formats
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBDEV_ENUM_MBUS_CODE
+
+``int ioctl(int fd, VIDIOC_SUBDEV_ENUM_MBUS_CODE, struct v4l2_subdev_mbus_code_enum * argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_subdev_mbus_code_enum`.
+
+Description
+===========
+
+To enumerate media bus formats available at a given sub-device pad
+applications initialize the ``pad``, ``which`` and ``index`` fields of
+struct
+:c:type:`v4l2_subdev_mbus_code_enum` and
+call the :ref:`VIDIOC_SUBDEV_ENUM_MBUS_CODE` ioctl with a pointer to this
+structure. Drivers fill the rest of the structure or return an ``EINVAL``
+error code if either the ``pad`` or ``index`` are invalid. All media bus
+formats are enumerable by beginning at index zero and incrementing by
+one until ``EINVAL`` is returned.
+
+Available media bus formats may depend on the current 'try' formats at
+other pads of the sub-device, as well as on the current active links.
+See :ref:`VIDIOC_SUBDEV_G_FMT` for more
+information about the try formats.
+
+.. c:type:: v4l2_subdev_mbus_code_enum
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_subdev_mbus_code_enum
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media controller API.
+    * - __u32
+      - ``index``
+      - Number of the format in the enumeration, set by the application.
+    * - __u32
+      - ``code``
+      - The media bus format code, as defined in
+	:ref:`v4l2-mbus-format`.
+    * - __u32
+      - ``which``
+      - Media bus format codes to be enumerated, from enum
+	:ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`.
+    * - __u32
+      - ``flags``
+      - See :ref:`v4l2-subdev-mbus-code-flags`
+    * - __u32
+      - ``reserved``\ [7]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{7.7cm}|
+
+.. _v4l2-subdev-mbus-code-flags:
+
+.. flat-table:: Subdev Media Bus Code Enumerate Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - V4L2_SUBDEV_MBUS_CODE_CSC_COLORSPACE
+      - 0x00000001
+      - The driver allows the application to try to change the default colorspace
+	encoding. The application can ask to configure the colorspace of the
+	subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
+	ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
+	See :ref:`v4l2-mbus-format` on how to do this.
+    * - V4L2_SUBDEV_MBUS_CODE_CSC_XFER_FUNC
+      - 0x00000002
+      - The driver allows the application to try to change the default transform function.
+	The application can ask to configure the transform function of
+	the subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
+	ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
+	See :ref:`v4l2-mbus-format` on how to do this.
+    * - V4L2_SUBDEV_MBUS_CODE_CSC_YCBCR_ENC
+      - 0x00000004
+      - The driver allows the application to try to change the default Y'CbCr
+	encoding. The application can ask to configure the Y'CbCr encoding of the
+	subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
+	ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
+	See :ref:`v4l2-mbus-format` on how to do this.
+    * - V4L2_SUBDEV_MBUS_CODE_CSC_HSV_ENC
+      - 0x00000004
+      - The driver allows the application to try to change the default HSV
+	encoding. The application can ask to configure the HSV encoding of the
+	subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
+	ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
+	See :ref:`v4l2-mbus-format` on how to do this.
+    * - V4L2_SUBDEV_MBUS_CODE_CSC_QUANTIZATION
+      - 0x00000008
+      - The driver allows the application to try to change the default
+	quantization. The application can ask to configure the quantization of
+	the subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
+	ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
+	See :ref:`v4l2-mbus-format` on how to do this.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EINVAL
+    The struct
+    :c:type:`v4l2_subdev_mbus_code_enum`
+    ``pad`` references a non-existing pad, or the ``index`` field is out
+    of bounds.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subdev-g-crop.rst b/Documentation/userspace-api/media/v4l/vidioc-subdev-g-crop.rst
new file mode 100644
index 000000000..2d78b4f59
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subdev-g-crop.rst
@@ -0,0 +1,125 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBDEV_G_CROP:
+
+************************************************
+ioctl VIDIOC_SUBDEV_G_CROP, VIDIOC_SUBDEV_S_CROP
+************************************************
+
+Name
+====
+
+VIDIOC_SUBDEV_G_CROP - VIDIOC_SUBDEV_S_CROP - Get or set the crop rectangle on a subdev pad
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBDEV_G_CROP
+
+``int ioctl(int fd, VIDIOC_SUBDEV_G_CROP, struct v4l2_subdev_crop *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_S_CROP
+
+``int ioctl(int fd, VIDIOC_SUBDEV_S_CROP, const struct v4l2_subdev_crop *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_subdev_crop`.
+
+Description
+===========
+
+.. note::
+
+    This is an :ref:`obsolete` interface and may be removed
+    in the future. It is superseded by
+    :ref:`the selection API <VIDIOC_SUBDEV_G_SELECTION>`.
+
+To retrieve the current crop rectangle applications set the ``pad``
+field of a struct :c:type:`v4l2_subdev_crop` to the
+desired pad number as reported by the media API and the ``which`` field
+to ``V4L2_SUBDEV_FORMAT_ACTIVE``. They then call the
+``VIDIOC_SUBDEV_G_CROP`` ioctl with a pointer to this structure. The
+driver fills the members of the ``rect`` field or returns ``EINVAL`` error
+code if the input arguments are invalid, or if cropping is not supported
+on the given pad.
+
+To change the current crop rectangle applications set both the ``pad``
+and ``which`` fields and all members of the ``rect`` field. They then
+call the ``VIDIOC_SUBDEV_S_CROP`` ioctl with a pointer to this
+structure. The driver verifies the requested crop rectangle, adjusts it
+based on the hardware capabilities and configures the device. Upon
+return the struct :c:type:`v4l2_subdev_crop`
+contains the current format as would be returned by a
+``VIDIOC_SUBDEV_G_CROP`` call.
+
+Applications can query the device capabilities by setting the ``which``
+to ``V4L2_SUBDEV_FORMAT_TRY``. When set, 'try' crop rectangles are not
+applied to the device by the driver, but are mangled exactly as active
+crop rectangles and stored in the sub-device file handle. Two
+applications querying the same sub-device would thus not interact with
+each other.
+
+If the subdev device node has been registered in read-only mode, calls to
+``VIDIOC_SUBDEV_S_CROP`` are only valid if the ``which`` field is set to
+``V4L2_SUBDEV_FORMAT_TRY``, otherwise an error is returned and the errno
+variable is set to ``-EPERM``.
+
+Drivers must not return an error solely because the requested crop
+rectangle doesn't match the device capabilities. They must instead
+modify the rectangle to match what the hardware can provide. The
+modified format should be as close as possible to the original request.
+
+.. c:type:: v4l2_subdev_crop
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_subdev_crop
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media framework.
+    * - __u32
+      - ``which``
+      - Crop rectangle to get or set, from enum
+	:ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`.
+    * - struct :c:type:`v4l2_rect`
+      - ``rect``
+      - Crop rectangle boundaries, in pixels.
+    * - __u32
+      - ``reserved``\ [8]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EBUSY
+    The crop rectangle can't be changed because the pad is currently
+    busy. This can be caused, for instance, by an active video stream on
+    the pad. The ioctl must not be retried without performing another
+    action to fix the problem first. Only returned by
+    ``VIDIOC_SUBDEV_S_CROP``
+
+EINVAL
+    The struct :c:type:`v4l2_subdev_crop` ``pad``
+    references a non-existing pad, the ``which`` field references a
+    non-existing format, or cropping is not supported on the given
+    subdev pad.
+
+EPERM
+    The ``VIDIOC_SUBDEV_S_CROP`` ioctl has been called on a read-only subdevice
+    and the ``which`` field is set to ``V4L2_SUBDEV_FORMAT_ACTIVE``.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subdev-g-fmt.rst b/Documentation/userspace-api/media/v4l/vidioc-subdev-g-fmt.rst
new file mode 100644
index 000000000..90b9bbfb6
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subdev-g-fmt.rst
@@ -0,0 +1,152 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBDEV_G_FMT:
+
+**********************************************
+ioctl VIDIOC_SUBDEV_G_FMT, VIDIOC_SUBDEV_S_FMT
+**********************************************
+
+Name
+====
+
+VIDIOC_SUBDEV_G_FMT - VIDIOC_SUBDEV_S_FMT - Get or set the data format on a subdev pad
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBDEV_G_FMT
+
+``int ioctl(int fd, VIDIOC_SUBDEV_G_FMT, struct v4l2_subdev_format *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_S_FMT
+
+``int ioctl(int fd, VIDIOC_SUBDEV_S_FMT, struct v4l2_subdev_format *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_subdev_format`.
+
+Description
+===========
+
+These ioctls are used to negotiate the frame format at specific subdev
+pads in the image pipeline.
+
+To retrieve the current format applications set the ``pad`` field of a
+struct :c:type:`v4l2_subdev_format` to the desired
+pad number as reported by the media API and the ``which`` field to
+``V4L2_SUBDEV_FORMAT_ACTIVE``. When they call the
+``VIDIOC_SUBDEV_G_FMT`` ioctl with a pointer to this structure the
+driver fills the members of the ``format`` field.
+
+To change the current format applications set both the ``pad`` and
+``which`` fields and all members of the ``format`` field. When they call
+the ``VIDIOC_SUBDEV_S_FMT`` ioctl with a pointer to this structure the
+driver verifies the requested format, adjusts it based on the hardware
+capabilities and configures the device. Upon return the struct
+:c:type:`v4l2_subdev_format` contains the current
+format as would be returned by a ``VIDIOC_SUBDEV_G_FMT`` call.
+
+Applications can query the device capabilities by setting the ``which``
+to ``V4L2_SUBDEV_FORMAT_TRY``. When set, 'try' formats are not applied
+to the device by the driver, but are changed exactly as active formats
+and stored in the sub-device file handle. Two applications querying the
+same sub-device would thus not interact with each other.
+
+For instance, to try a format at the output pad of a sub-device,
+applications would first set the try format at the sub-device input with
+the ``VIDIOC_SUBDEV_S_FMT`` ioctl. They would then either retrieve the
+default format at the output pad with the ``VIDIOC_SUBDEV_G_FMT`` ioctl,
+or set the desired output pad format with the ``VIDIOC_SUBDEV_S_FMT``
+ioctl and check the returned value.
+
+Try formats do not depend on active formats, but can depend on the
+current links configuration or sub-device controls value. For instance,
+a low-pass noise filter might crop pixels at the frame boundaries,
+modifying its output frame size.
+
+If the subdev device node has been registered in read-only mode, calls to
+``VIDIOC_SUBDEV_S_FMT`` are only valid if the ``which`` field is set to
+``V4L2_SUBDEV_FORMAT_TRY``, otherwise an error is returned and the errno
+variable is set to ``-EPERM``.
+
+Drivers must not return an error solely because the requested format
+doesn't match the device capabilities. They must instead modify the
+format to match what the hardware can provide. The modified format
+should be as close as possible to the original request.
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_subdev_format
+
+.. flat-table:: struct v4l2_subdev_format
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media controller API.
+    * - __u32
+      - ``which``
+      - Format to modified, from enum
+	:ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`.
+    * - struct :c:type:`v4l2_mbus_framefmt`
+      - ``format``
+      - Definition of an image format, see :c:type:`v4l2_mbus_framefmt` for
+	details.
+    * - __u32
+      - ``reserved``\ [8]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _v4l2-subdev-format-whence:
+
+.. flat-table:: enum v4l2_subdev_format_whence
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - V4L2_SUBDEV_FORMAT_TRY
+      - 0
+      - Try formats, used for querying device capabilities.
+    * - V4L2_SUBDEV_FORMAT_ACTIVE
+      - 1
+      - Active formats, applied to the hardware.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EBUSY
+    The format can't be changed because the pad is currently busy. This
+    can be caused, for instance, by an active video stream on the pad.
+    The ioctl must not be retried without performing another action to
+    fix the problem first. Only returned by ``VIDIOC_SUBDEV_S_FMT``
+
+EINVAL
+    The struct :c:type:`v4l2_subdev_format`
+    ``pad`` references a non-existing pad, or the ``which`` field
+    references a non-existing format.
+
+EPERM
+    The ``VIDIOC_SUBDEV_S_FMT`` ioctl has been called on a read-only subdevice
+    and the ``which`` field is set to ``V4L2_SUBDEV_FORMAT_ACTIVE``.
+
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subdev-g-frame-interval.rst b/Documentation/userspace-api/media/v4l/vidioc-subdev-g-frame-interval.rst
new file mode 100644
index 000000000..3a50f8b28
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subdev-g-frame-interval.rst
@@ -0,0 +1,119 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBDEV_G_FRAME_INTERVAL:
+
+********************************************************************
+ioctl VIDIOC_SUBDEV_G_FRAME_INTERVAL, VIDIOC_SUBDEV_S_FRAME_INTERVAL
+********************************************************************
+
+Name
+====
+
+VIDIOC_SUBDEV_G_FRAME_INTERVAL - VIDIOC_SUBDEV_S_FRAME_INTERVAL - Get or set the frame interval on a subdev pad
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBDEV_G_FRAME_INTERVAL
+
+``int ioctl(int fd, VIDIOC_SUBDEV_G_FRAME_INTERVAL, struct v4l2_subdev_frame_interval *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_S_FRAME_INTERVAL
+
+``int ioctl(int fd, VIDIOC_SUBDEV_S_FRAME_INTERVAL, struct v4l2_subdev_frame_interval *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_subdev_frame_interval`.
+
+Description
+===========
+
+These ioctls are used to get and set the frame interval at specific
+subdev pads in the image pipeline. The frame interval only makes sense
+for sub-devices that can control the frame period on their own. This
+includes, for instance, image sensors and TV tuners. Sub-devices that
+don't support frame intervals must not implement these ioctls.
+
+To retrieve the current frame interval applications set the ``pad``
+field of a struct
+:c:type:`v4l2_subdev_frame_interval` to
+the desired pad number as reported by the media controller API. When
+they call the ``VIDIOC_SUBDEV_G_FRAME_INTERVAL`` ioctl with a pointer to
+this structure the driver fills the members of the ``interval`` field.
+
+To change the current frame interval applications set both the ``pad``
+field and all members of the ``interval`` field. When they call the
+``VIDIOC_SUBDEV_S_FRAME_INTERVAL`` ioctl with a pointer to this
+structure the driver verifies the requested interval, adjusts it based
+on the hardware capabilities and configures the device. Upon return the
+struct
+:c:type:`v4l2_subdev_frame_interval`
+contains the current frame interval as would be returned by a
+``VIDIOC_SUBDEV_G_FRAME_INTERVAL`` call.
+
+Calling ``VIDIOC_SUBDEV_S_FRAME_INTERVAL`` on a subdev device node that has been
+registered in read-only mode is not allowed. An error is returned and the errno
+variable is set to ``-EPERM``.
+
+Drivers must not return an error solely because the requested interval
+doesn't match the device capabilities. They must instead modify the
+interval to match what the hardware can provide. The modified interval
+should be as close as possible to the original request.
+
+Changing the frame interval shall never change the format. Changing the
+format, on the other hand, may change the frame interval.
+
+Sub-devices that support the frame interval ioctls should implement them
+on a single pad only. Their behaviour when supported on multiple pads of
+the same sub-device is not defined.
+
+.. c:type:: v4l2_subdev_frame_interval
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_subdev_frame_interval
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media controller API.
+    * - struct :c:type:`v4l2_fract`
+      - ``interval``
+      - Period, in seconds, between consecutive video frames.
+    * - __u32
+      - ``reserved``\ [9]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EBUSY
+    The frame interval can't be changed because the pad is currently
+    busy. This can be caused, for instance, by an active video stream on
+    the pad. The ioctl must not be retried without performing another
+    action to fix the problem first. Only returned by
+    ``VIDIOC_SUBDEV_S_FRAME_INTERVAL``
+
+EINVAL
+    The struct
+    :c:type:`v4l2_subdev_frame_interval`
+    ``pad`` references a non-existing pad, or the pad doesn't support
+    frame intervals.
+
+EPERM
+    The ``VIDIOC_SUBDEV_S_FRAME_INTERVAL`` ioctl has been called on a read-only
+    subdevice.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subdev-g-selection.rst b/Documentation/userspace-api/media/v4l/vidioc-subdev-g-selection.rst
new file mode 100644
index 000000000..f35b9562d
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subdev-g-selection.rst
@@ -0,0 +1,123 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBDEV_G_SELECTION:
+
+**********************************************************
+ioctl VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION
+**********************************************************
+
+Name
+====
+
+VIDIOC_SUBDEV_G_SELECTION - VIDIOC_SUBDEV_S_SELECTION - Get or set selection rectangles on a subdev pad
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBDEV_G_SELECTION
+
+``int ioctl(int fd, VIDIOC_SUBDEV_G_SELECTION, struct v4l2_subdev_selection *argp)``
+
+.. c:macro:: VIDIOC_SUBDEV_S_SELECTION
+
+``int ioctl(int fd, VIDIOC_SUBDEV_S_SELECTION, struct v4l2_subdev_selection *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_subdev_selection`.
+
+Description
+===========
+
+The selections are used to configure various image processing
+functionality performed by the subdevs which affect the image size. This
+currently includes cropping, scaling and composition.
+
+The selection API replaces
+:ref:`the old subdev crop API <VIDIOC_SUBDEV_G_CROP>`. All the
+function of the crop API, and more, are supported by the selections API.
+
+See :ref:`subdev` for more information on how each selection target
+affects the image processing pipeline inside the subdevice.
+
+If the subdev device node has been registered in read-only mode, calls to
+``VIDIOC_SUBDEV_S_SELECTION`` are only valid if the ``which`` field is set to
+``V4L2_SUBDEV_FORMAT_TRY``, otherwise an error is returned and the errno
+variable is set to ``-EPERM``.
+
+Types of selection targets
+--------------------------
+
+There are two types of selection targets: actual and bounds. The actual
+targets are the targets which configure the hardware. The BOUNDS target
+will return a rectangle that contain all possible actual rectangles.
+
+Discovering supported features
+------------------------------
+
+To discover which targets are supported, the user can perform
+``VIDIOC_SUBDEV_G_SELECTION`` on them. Any unsupported target will
+return ``EINVAL``.
+
+Selection targets and flags are documented in
+:ref:`v4l2-selections-common`.
+
+.. c:type:: v4l2_subdev_selection
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
+
+.. flat-table:: struct v4l2_subdev_selection
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``which``
+      - Active or try selection, from enum
+	:ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`.
+    * - __u32
+      - ``pad``
+      - Pad number as reported by the media framework.
+    * - __u32
+      - ``target``
+      - Target selection rectangle. See :ref:`v4l2-selections-common`.
+    * - __u32
+      - ``flags``
+      - Flags. See :ref:`v4l2-selection-flags`.
+    * - struct :c:type:`v4l2_rect`
+      - ``r``
+      - Selection rectangle, in pixels.
+    * - __u32
+      - ``reserved``\ [8]
+      - Reserved for future extensions. Applications and drivers must set
+	the array to zero.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+EBUSY
+    The selection rectangle can't be changed because the pad is
+    currently busy. This can be caused, for instance, by an active video
+    stream on the pad. The ioctl must not be retried without performing
+    another action to fix the problem first. Only returned by
+    ``VIDIOC_SUBDEV_S_SELECTION``
+
+EINVAL
+    The struct :c:type:`v4l2_subdev_selection`
+    ``pad`` references a non-existing pad, the ``which`` field
+    references a non-existing format, or the selection target is not
+    supported on the given subdev pad.
+
+EPERM
+    The ``VIDIOC_SUBDEV_S_SELECTION`` ioctl has been called on a read-only
+    subdevice and the ``which`` field is set to ``V4L2_SUBDEV_FORMAT_ACTIVE``.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subdev-querycap.rst b/Documentation/userspace-api/media/v4l/vidioc-subdev-querycap.rst
new file mode 100644
index 000000000..949d9775b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subdev-querycap.rst
@@ -0,0 +1,104 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBDEV_QUERYCAP:
+
+****************************
+ioctl VIDIOC_SUBDEV_QUERYCAP
+****************************
+
+Name
+====
+
+VIDIOC_SUBDEV_QUERYCAP - Query sub-device capabilities
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBDEV_QUERYCAP
+
+``int ioctl(int fd, VIDIOC_SUBDEV_QUERYCAP, struct v4l2_subdev_capability *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_subdev_capability`.
+
+Description
+===========
+
+All V4L2 sub-devices support the ``VIDIOC_SUBDEV_QUERYCAP`` ioctl. It is used to
+identify kernel devices compatible with this specification and to obtain
+information about driver and hardware capabilities. The ioctl takes a pointer to
+a struct :c:type:`v4l2_subdev_capability` which is filled by the driver. When
+the driver is not compatible with this specification the ioctl returns
+``ENOTTY`` error code.
+
+.. tabularcolumns:: |p{1.5cm}|p{2.5cm}|p{13cm}|
+
+.. c:type:: v4l2_subdev_capability
+
+.. flat-table:: struct v4l2_subdev_capability
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 4 20
+
+    * - __u32
+      - ``version``
+      - Version number of the driver.
+
+	The version reported is provided by the V4L2 subsystem following the
+	kernel numbering scheme. However, it may not always return the same
+	version as the kernel if, for example, a stable or
+	distribution-modified kernel uses the V4L2 stack from a newer kernel.
+
+	The version number is formatted using the ``KERNEL_VERSION()``
+	macro:
+    * - :cspan:`2`
+
+	``#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))``
+
+	``__u32 version = KERNEL_VERSION(0, 8, 1);``
+
+	``printf ("Version: %u.%u.%u\\n",``
+
+	``(version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);``
+    * - __u32
+      - ``capabilities``
+      - Sub-device capabilities of the opened device, see
+	:ref:`subdevice-capabilities`.
+    * - __u32
+      - ``reserved``\ [14]
+      - Reserved for future extensions. Set to 0 by the V4L2 core.
+
+.. tabularcolumns:: |p{6cm}|p{2.2cm}|p{8.8cm}|
+
+.. _subdevice-capabilities:
+
+.. cssclass:: longtable
+
+.. flat-table:: Sub-Device Capabilities Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - V4L2_SUBDEV_CAP_RO_SUBDEV
+      - 0x00000001
+      - The sub-device device node is registered in read-only mode.
+	Access to the sub-device ioctls that modify the device state is
+	restricted. Refer to each individual subdevice ioctl documentation
+	for a description of which restrictions apply to a read-only sub-device.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
+
+ENOTTY
+    The device node is not a V4L2 sub-device.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-subscribe-event.rst b/Documentation/userspace-api/media/v4l/vidioc-subscribe-event.rst
new file mode 100644
index 000000000..d1ad35164
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-subscribe-event.rst
@@ -0,0 +1,113 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_SUBSCRIBE_EVENT:
+.. _VIDIOC_UNSUBSCRIBE_EVENT:
+
+******************************************************
+ioctl VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT
+******************************************************
+
+Name
+====
+
+VIDIOC_SUBSCRIBE_EVENT - VIDIOC_UNSUBSCRIBE_EVENT - Subscribe or unsubscribe event
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_SUBSCRIBE_EVENT
+
+``int ioctl(int fd, VIDIOC_SUBSCRIBE_EVENT, struct v4l2_event_subscription *argp)``
+
+.. c:macro:: VIDIOC_UNSUBSCRIBE_EVENT
+
+``int ioctl(int fd, VIDIOC_UNSUBSCRIBE_EVENT, struct v4l2_event_subscription *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_event_subscription`.
+
+Description
+===========
+
+Subscribe or unsubscribe V4L2 event. Subscribed events are dequeued by
+using the :ref:`VIDIOC_DQEVENT` ioctl.
+
+.. tabularcolumns:: |p{4.6cm}|p{4.4cm}|p{8.7cm}|
+
+.. c:type:: v4l2_event_subscription
+
+.. flat-table:: struct v4l2_event_subscription
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of the event, see :ref:`event-type`.
+
+	.. note::
+
+	   ``V4L2_EVENT_ALL`` can be used with
+	   :ref:`VIDIOC_UNSUBSCRIBE_EVENT <VIDIOC_SUBSCRIBE_EVENT>` for
+	   unsubscribing all events at once.
+    * - __u32
+      - ``id``
+      - ID of the event source. If there is no ID associated with the
+	event source, then set this to 0. Whether or not an event needs an
+	ID depends on the event type.
+    * - __u32
+      - ``flags``
+      - Event flags, see :ref:`event-flags`.
+    * - __u32
+      - ``reserved``\ [5]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+
+
+.. tabularcolumns:: |p{6.8cm}|p{2.2cm}|p{8.5cm}|
+
+.. _event-flags:
+
+.. flat-table:: Event Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_EVENT_SUB_FL_SEND_INITIAL``
+      - 0x0001
+      - When this event is subscribed an initial event will be sent
+	containing the current status. This only makes sense for events
+	that are triggered by a status change such as ``V4L2_EVENT_CTRL``.
+	Other events will ignore this flag.
+    * - ``V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK``
+      - 0x0002
+      - If set, then events directly caused by an ioctl will also be sent
+	to the filehandle that called that ioctl. For example, changing a
+	control using :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` will cause
+	a V4L2_EVENT_CTRL to be sent back to that same filehandle.
+	Normally such events are suppressed to prevent feedback loops
+	where an application changes a control to a one value and then
+	another, and then receives an event telling it that that control
+	has changed to the first value.
+
+	Since it can't tell whether that event was caused by another
+	application or by the :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>`
+	call it is hard to decide whether to set the control to the value
+	in the event, or ignore it.
+
+	Think carefully when you set this flag so you won't get into
+	situations like that.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/v4l/yuv-formats.rst b/Documentation/userspace-api/media/v4l/yuv-formats.rst
new file mode 100644
index 000000000..4a05a105a
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/yuv-formats.rst
@@ -0,0 +1,57 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _yuv-formats:
+
+***********
+YUV Formats
+***********
+
+YUV is the format native to TV broadcast and composite video signals. It
+separates the brightness information (Y) from the color information (U
+and V or Cb and Cr). The color information consists of red and blue
+*color difference* signals, this way the green component can be
+reconstructed by subtracting from the brightness component. See
+:ref:`colorspaces` for conversion examples. YUV was chosen because
+early television would only transmit brightness information. To add
+color in a way compatible with existing receivers a new signal carrier
+was added to transmit the color difference signals. Secondary in the YUV
+format the U and V components usually have lower resolution than the Y
+component. This is an analog video compression technique taking
+advantage of a property of the human visual system, being more sensitive
+to brightness information.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-packed-yuv
+    pixfmt-grey
+    pixfmt-y10
+    pixfmt-y12
+    pixfmt-y14
+    pixfmt-y10b
+    pixfmt-y10p
+    pixfmt-y16
+    pixfmt-y16-be
+    pixfmt-y8i
+    pixfmt-y12i
+    pixfmt-uv8
+    pixfmt-yuyv
+    pixfmt-uyvy
+    pixfmt-yvyu
+    pixfmt-vyuy
+    pixfmt-y41p
+    pixfmt-yuv420
+    pixfmt-yuv420m
+    pixfmt-yuv422m
+    pixfmt-yuv444m
+    pixfmt-yuv410
+    pixfmt-yuv422p
+    pixfmt-yuv411p
+    pixfmt-nv12
+    pixfmt-nv12m
+    pixfmt-nv12mt
+    pixfmt-nv16
+    pixfmt-nv16m
+    pixfmt-nv24
+    pixfmt-m420
diff --git a/Documentation/userspace-api/media/video.h.rst.exceptions b/Documentation/userspace-api/media/video.h.rst.exceptions
new file mode 100644
index 000000000..ea9de59ad
--- /dev/null
+++ b/Documentation/userspace-api/media/video.h.rst.exceptions
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _UAPI_DVBVIDEO_H_
+
+# This is a deprecated obscure API. Just ignore things we don't know
+ignore define VIDEO_CMD_PLAY
+ignore define VIDEO_CMD_STOP
+ignore define VIDEO_CMD_FREEZE
+ignore define VIDEO_CMD_CONTINUE
+ignore define VIDEO_CMD_FREEZE_TO_BLACK
+ignore define VIDEO_CMD_STOP_TO_BLACK
+ignore define VIDEO_CMD_STOP_IMMEDIATELY
+ignore define VIDEO_PLAY_FMT_NONE
+ignore define VIDEO_PLAY_FMT_GOP
+ignore define VIDEO_VSYNC_FIELD_UNKNOWN
+ignore define VIDEO_VSYNC_FIELD_ODD
+ignore define VIDEO_VSYNC_FIELD_EVEN
+ignore define VIDEO_VSYNC_FIELD_PROGRESSIVE
+ignore define VIDEO_EVENT_SIZE_CHANGED
+ignore define VIDEO_EVENT_FRAME_RATE_CHANGED
+ignore define VIDEO_EVENT_DECODER_STOPPED
+ignore define VIDEO_EVENT_VSYNC
+ignore define VIDEO_CAP_MPEG1
+ignore define VIDEO_CAP_MPEG2
+ignore define VIDEO_CAP_SYS
+ignore define VIDEO_CAP_PROG
+ignore define VIDEO_CAP_SPU
+ignore define VIDEO_CAP_NAVI
+ignore define VIDEO_CAP_CSS
+
+# some typedefs should point to struct/enums
+replace typedef video_format_t :c:type:`video_format`
+replace typedef video_system_t :c:type:`video_system`
+replace typedef video_displayformat_t :c:type:`video_displayformat`
+replace typedef video_size_t :c:type:`video_size`
+replace typedef video_stream_source_t :c:type:`video_stream_source`
+replace typedef video_play_state_t :c:type:`video_play_state`
+replace typedef video_navi_pack_t :c:type:`video_navi_pack`
diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
new file mode 100644
index 000000000..121e396a2
--- /dev/null
+++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
@@ -0,0 +1,579 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Ignore header name
+ignore define _UAPI__LINUX_VIDEODEV2_H
+
+#
+# The cross reference valitator for videodev2.h DocBook never cared
+# about enum symbols or defines. Yet, they're all (or almost all?)
+# handled inside V4L API sections. So, for now, it is safe to just
+# ignore. This should be revisited, as validating it helps to avoid
+# having something not documented at the uAPI.
+#
+
+# Those symbols should not be used by uAPI - don't document them
+ignore symbol V4L2_BUF_TYPE_PRIVATE
+ignore symbol V4L2_TUNER_DIGITAL_TV
+ignore symbol V4L2_COLORSPACE_BT878
+
+# Documented enum v4l2_field
+replace symbol V4L2_FIELD_ALTERNATE :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_ANY :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_BOTTOM :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_INTERLACED :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_INTERLACED_BT :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_INTERLACED_TB :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_NONE :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_SEQ_BT :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_SEQ_TB :c:type:`v4l2_field`
+replace symbol V4L2_FIELD_TOP :c:type:`v4l2_field`
+
+# Documented enum v4l2_buf_type
+replace symbol V4L2_BUF_TYPE_META_CAPTURE :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_META_OUTPUT :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_SDR_CAPTURE :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_SDR_OUTPUT :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_SLICED_VBI_CAPTURE :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_SLICED_VBI_OUTPUT :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_VBI_CAPTURE :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_VBI_OUTPUT :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_VIDEO_CAPTURE :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_VIDEO_OUTPUT :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY :c:type:`v4l2_buf_type`
+replace symbol V4L2_BUF_TYPE_VIDEO_OVERLAY :c:type:`v4l2_buf_type`
+
+# Documented enum v4l2_tuner_type
+replace symbol V4L2_TUNER_ANALOG_TV :c:type:`v4l2_tuner_type`
+replace symbol V4L2_TUNER_RADIO :c:type:`v4l2_tuner_type`
+replace symbol V4L2_TUNER_RF :c:type:`v4l2_tuner_type`
+replace symbol V4L2_TUNER_SDR :c:type:`v4l2_tuner_type`
+
+# Documented enum v4l2_memory
+replace symbol V4L2_MEMORY_DMABUF :c:type:`v4l2_memory`
+replace symbol V4L2_MEMORY_MMAP :c:type:`v4l2_memory`
+replace symbol V4L2_MEMORY_OVERLAY :c:type:`v4l2_memory`
+replace symbol V4L2_MEMORY_USERPTR :c:type:`v4l2_memory`
+
+# Documented enum v4l2_colorspace
+replace symbol V4L2_COLORSPACE_470_SYSTEM_BG :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_470_SYSTEM_M :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_OPRGB :c:type:`v4l2_colorspace`
+replace define V4L2_COLORSPACE_ADOBERGB :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_BT2020 :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_DCI_P3 :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_DEFAULT :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_JPEG :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_RAW :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_REC709 :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_SMPTE170M :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_SMPTE240M :c:type:`v4l2_colorspace`
+replace symbol V4L2_COLORSPACE_SRGB :c:type:`v4l2_colorspace`
+
+# Documented enum v4l2_xfer_func
+replace symbol V4L2_XFER_FUNC_709 :c:type:`v4l2_xfer_func`
+replace symbol V4L2_XFER_FUNC_OPRGB :c:type:`v4l2_xfer_func`
+replace define V4L2_XFER_FUNC_ADOBERGB :c:type:`v4l2_xfer_func`
+replace symbol V4L2_XFER_FUNC_DCI_P3 :c:type:`v4l2_xfer_func`
+replace symbol V4L2_XFER_FUNC_DEFAULT :c:type:`v4l2_xfer_func`
+replace symbol V4L2_XFER_FUNC_NONE :c:type:`v4l2_xfer_func`
+replace symbol V4L2_XFER_FUNC_SMPTE2084 :c:type:`v4l2_xfer_func`
+replace symbol V4L2_XFER_FUNC_SMPTE240M :c:type:`v4l2_xfer_func`
+replace symbol V4L2_XFER_FUNC_SRGB :c:type:`v4l2_xfer_func`
+
+# Documented enum v4l2_ycbcr_encoding
+replace symbol V4L2_YCBCR_ENC_601 :c:type:`v4l2_ycbcr_encoding`
+replace symbol V4L2_YCBCR_ENC_709 :c:type:`v4l2_ycbcr_encoding`
+replace symbol V4L2_YCBCR_ENC_BT2020 :c:type:`v4l2_ycbcr_encoding`
+replace symbol V4L2_YCBCR_ENC_BT2020_CONST_LUM :c:type:`v4l2_ycbcr_encoding`
+replace symbol V4L2_YCBCR_ENC_DEFAULT :c:type:`v4l2_ycbcr_encoding`
+replace symbol V4L2_YCBCR_ENC_SYCC :c:type:`v4l2_ycbcr_encoding`
+replace symbol V4L2_YCBCR_ENC_XV601 :c:type:`v4l2_ycbcr_encoding`
+replace symbol V4L2_YCBCR_ENC_XV709 :c:type:`v4l2_ycbcr_encoding`
+replace symbol V4L2_YCBCR_ENC_SMPTE240M :c:type:`v4l2_ycbcr_encoding`
+
+# Documented enum v4l2_hsv_encoding
+replace symbol V4L2_HSV_ENC_180 :c:type:`v4l2_hsv_encoding`
+replace symbol V4L2_HSV_ENC_256 :c:type:`v4l2_hsv_encoding`
+
+# Documented enum v4l2_quantization
+replace symbol V4L2_QUANTIZATION_DEFAULT :c:type:`v4l2_quantization`
+replace symbol V4L2_QUANTIZATION_FULL_RANGE :c:type:`v4l2_quantization`
+replace symbol V4L2_QUANTIZATION_LIM_RANGE :c:type:`v4l2_quantization`
+
+# Documented enum v4l2_priority
+replace symbol V4L2_PRIORITY_BACKGROUND :c:type:`v4l2_priority`
+replace symbol V4L2_PRIORITY_DEFAULT :c:type:`v4l2_priority`
+replace symbol V4L2_PRIORITY_INTERACTIVE :c:type:`v4l2_priority`
+replace symbol V4L2_PRIORITY_RECORD :c:type:`v4l2_priority`
+replace symbol V4L2_PRIORITY_UNSET :c:type:`v4l2_priority`
+
+# Documented enum v4l2_frmsizetypes
+replace symbol V4L2_FRMSIZE_TYPE_CONTINUOUS :c:type:`v4l2_frmsizetypes`
+replace symbol V4L2_FRMSIZE_TYPE_DISCRETE :c:type:`v4l2_frmsizetypes`
+replace symbol V4L2_FRMSIZE_TYPE_STEPWISE :c:type:`v4l2_frmsizetypes`
+
+# Documented enum frmivaltypes
+replace symbol V4L2_FRMIVAL_TYPE_CONTINUOUS :c:type:`v4l2_frmivaltypes`
+replace symbol V4L2_FRMIVAL_TYPE_DISCRETE :c:type:`v4l2_frmivaltypes`
+replace symbol V4L2_FRMIVAL_TYPE_STEPWISE :c:type:`v4l2_frmivaltypes`
+
+# Documented enum :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_COMPOUND_TYPES vidioc_queryctrl
+
+replace symbol V4L2_CTRL_TYPE_BITMASK :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_BOOLEAN :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_BUTTON :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_CTRL_CLASS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_INTEGER :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_INTEGER64 :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_INTEGER_MENU :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_MENU :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_STRING :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_U16 :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_U32 :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_U8 :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_MPEG2_QUANTIZATION :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_H264_SPS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_H264_PPS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_H264_SCALING_MATRIX :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_H264_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_H264_DECODE_PARAMS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_HEVC_SPS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_HEVC_PPS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_AREA :c:type:`v4l2_ctrl_type`
+
+# V4L2 capability defines
+replace define V4L2_CAP_VIDEO_CAPTURE device-capabilities
+replace define V4L2_CAP_VIDEO_CAPTURE_MPLANE device-capabilities
+replace define V4L2_CAP_VIDEO_OUTPUT device-capabilities
+replace define V4L2_CAP_VIDEO_OUTPUT_MPLANE device-capabilities
+replace define V4L2_CAP_VIDEO_M2M device-capabilities
+replace define V4L2_CAP_VIDEO_M2M_MPLANE device-capabilities
+replace define V4L2_CAP_VIDEO_OVERLAY device-capabilities
+replace define V4L2_CAP_VBI_CAPTURE device-capabilities
+replace define V4L2_CAP_VBI_OUTPUT device-capabilities
+replace define V4L2_CAP_SLICED_VBI_CAPTURE device-capabilities
+replace define V4L2_CAP_SLICED_VBI_OUTPUT device-capabilities
+replace define V4L2_CAP_RDS_CAPTURE device-capabilities
+replace define V4L2_CAP_VIDEO_OUTPUT_OVERLAY device-capabilities
+replace define V4L2_CAP_HW_FREQ_SEEK device-capabilities
+replace define V4L2_CAP_RDS_OUTPUT device-capabilities
+replace define V4L2_CAP_TUNER device-capabilities
+replace define V4L2_CAP_AUDIO device-capabilities
+replace define V4L2_CAP_RADIO device-capabilities
+replace define V4L2_CAP_MODULATOR device-capabilities
+replace define V4L2_CAP_SDR_CAPTURE device-capabilities
+replace define V4L2_CAP_EXT_PIX_FORMAT device-capabilities
+replace define V4L2_CAP_SDR_OUTPUT device-capabilities
+replace define V4L2_CAP_META_CAPTURE device-capabilities
+replace define V4L2_CAP_READWRITE device-capabilities
+replace define V4L2_CAP_ASYNCIO device-capabilities
+replace define V4L2_CAP_STREAMING device-capabilities
+replace define V4L2_CAP_META_OUTPUT device-capabilities
+replace define V4L2_CAP_DEVICE_CAPS device-capabilities
+replace define V4L2_CAP_TOUCH device-capabilities
+replace define V4L2_CAP_IO_MC device-capabilities
+
+# V4L2 pix flags
+replace define V4L2_PIX_FMT_PRIV_MAGIC :c:type:`v4l2_pix_format`
+replace define V4L2_PIX_FMT_FLAG_PREMUL_ALPHA format-flags
+
+# V4L2 format flags
+replace define V4L2_FMT_FLAG_COMPRESSED fmtdesc-flags
+replace define V4L2_FMT_FLAG_EMULATED fmtdesc-flags
+replace define V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM fmtdesc-flags
+replace define V4L2_FMT_FLAG_DYN_RESOLUTION fmtdesc-flags
+replace define V4L2_FMT_FLAG_ENC_CAP_FRAME_INTERVAL fmtdesc-flags
+replace define V4L2_FMT_FLAG_CSC_COLORSPACE fmtdesc-flags
+replace define V4L2_FMT_FLAG_CSC_XFER_FUNC fmtdesc-flags
+replace define V4L2_FMT_FLAG_CSC_YCBCR_ENC fmtdesc-flags
+replace define V4L2_FMT_FLAG_CSC_HSV_ENC fmtdesc-flags
+replace define V4L2_FMT_FLAG_CSC_QUANTIZATION fmtdesc-flags
+
+# V4L2 timecode types
+replace define V4L2_TC_TYPE_24FPS timecode-type
+replace define V4L2_TC_TYPE_25FPS timecode-type
+replace define V4L2_TC_TYPE_30FPS timecode-type
+replace define V4L2_TC_TYPE_50FPS timecode-type
+replace define V4L2_TC_TYPE_60FPS timecode-type
+
+# V4L2 timecode flags
+replace define V4L2_TC_FLAG_DROPFRAME timecode-flags
+replace define V4L2_TC_FLAG_COLORFRAME timecode-flags
+replace define V4L2_TC_USERBITS_field timecode-flags
+replace define V4L2_TC_USERBITS_USERDEFINED timecode-flags
+replace define V4L2_TC_USERBITS_8BITCHARS timecode-flags
+
+# V4L2 JPEG markers
+replace define V4L2_JPEG_MARKER_DHT jpeg-markers
+replace define V4L2_JPEG_MARKER_DQT jpeg-markers
+replace define V4L2_JPEG_MARKER_DRI jpeg-markers
+replace define V4L2_JPEG_MARKER_COM jpeg-markers
+replace define V4L2_JPEG_MARKER_APP jpeg-markers
+
+# V4L2 framebuffer caps and flags
+
+replace define V4L2_FBUF_CAP_EXTERNOVERLAY framebuffer-cap
+replace define V4L2_FBUF_CAP_CHROMAKEY framebuffer-cap
+replace define V4L2_FBUF_CAP_LIST_CLIPPING framebuffer-cap
+replace define V4L2_FBUF_CAP_BITMAP_CLIPPING framebuffer-cap
+replace define V4L2_FBUF_CAP_LOCAL_ALPHA framebuffer-cap
+replace define V4L2_FBUF_CAP_GLOBAL_ALPHA framebuffer-cap
+replace define V4L2_FBUF_CAP_LOCAL_INV_ALPHA framebuffer-cap
+replace define V4L2_FBUF_CAP_SRC_CHROMAKEY framebuffer-cap
+
+replace define V4L2_FBUF_FLAG_PRIMARY framebuffer-flags
+replace define V4L2_FBUF_FLAG_OVERLAY framebuffer-flags
+replace define V4L2_FBUF_FLAG_CHROMAKEY framebuffer-flags
+replace define V4L2_FBUF_FLAG_LOCAL_ALPHA framebuffer-flags
+replace define V4L2_FBUF_FLAG_GLOBAL_ALPHA framebuffer-flags
+replace define V4L2_FBUF_FLAG_LOCAL_INV_ALPHA framebuffer-flags
+replace define V4L2_FBUF_FLAG_SRC_CHROMAKEY framebuffer-flags
+
+# Used on VIDIOC_G_PARM
+
+replace define V4L2_MODE_HIGHQUALITY parm-flags
+replace define V4L2_CAP_TIMEPERFRAME :c:type:`v4l2_captureparm`
+
+# The V4L2_STD_foo are all defined at v4l2_std_id table
+
+replace define V4L2_STD_PAL_B v4l2-std-id
+replace define V4L2_STD_PAL_B1 v4l2-std-id
+replace define V4L2_STD_PAL_G v4l2-std-id
+replace define V4L2_STD_PAL_H v4l2-std-id
+replace define V4L2_STD_PAL_I v4l2-std-id
+replace define V4L2_STD_PAL_D v4l2-std-id
+replace define V4L2_STD_PAL_D1 v4l2-std-id
+replace define V4L2_STD_PAL_K v4l2-std-id
+replace define V4L2_STD_PAL_M v4l2-std-id
+replace define V4L2_STD_PAL_N v4l2-std-id
+replace define V4L2_STD_PAL_Nc v4l2-std-id
+replace define V4L2_STD_PAL_60 v4l2-std-id
+replace define V4L2_STD_NTSC_M v4l2-std-id
+replace define V4L2_STD_NTSC_M_JP v4l2-std-id
+replace define V4L2_STD_NTSC_443 v4l2-std-id
+replace define V4L2_STD_NTSC_M_KR v4l2-std-id
+replace define V4L2_STD_SECAM_B v4l2-std-id
+replace define V4L2_STD_SECAM_D v4l2-std-id
+replace define V4L2_STD_SECAM_G v4l2-std-id
+replace define V4L2_STD_SECAM_H v4l2-std-id
+replace define V4L2_STD_SECAM_K v4l2-std-id
+replace define V4L2_STD_SECAM_K1 v4l2-std-id
+replace define V4L2_STD_SECAM_L v4l2-std-id
+replace define V4L2_STD_SECAM_LC v4l2-std-id
+replace define V4L2_STD_ATSC_8_VSB v4l2-std-id
+replace define V4L2_STD_ATSC_16_VSB v4l2-std-id
+replace define V4L2_STD_NTSC v4l2-std-id
+replace define V4L2_STD_SECAM_DK v4l2-std-id
+replace define V4L2_STD_SECAM v4l2-std-id
+replace define V4L2_STD_PAL_BG v4l2-std-id
+replace define V4L2_STD_PAL_DK v4l2-std-id
+replace define V4L2_STD_PAL v4l2-std-id
+replace define V4L2_STD_B v4l2-std-id
+replace define V4L2_STD_G v4l2-std-id
+replace define V4L2_STD_H v4l2-std-id
+replace define V4L2_STD_L v4l2-std-id
+replace define V4L2_STD_GH v4l2-std-id
+replace define V4L2_STD_DK v4l2-std-id
+replace define V4L2_STD_BG v4l2-std-id
+replace define V4L2_STD_MN v4l2-std-id
+replace define V4L2_STD_MTS v4l2-std-id
+replace define V4L2_STD_525_60 v4l2-std-id
+replace define V4L2_STD_625_50 v4l2-std-id
+replace define V4L2_STD_ATSC v4l2-std-id
+replace define V4L2_STD_UNKNOWN v4l2-std-id
+replace define V4L2_STD_ALL v4l2-std-id
+
+# V4L2 DT BT timings definitions
+
+replace define V4L2_DV_PROGRESSIVE :c:type:`v4l2_bt_timings`
+replace define V4L2_DV_INTERLACED :c:type:`v4l2_bt_timings`
+
+replace define V4L2_DV_VSYNC_POS_POL :c:type:`v4l2_bt_timings`
+replace define V4L2_DV_HSYNC_POS_POL :c:type:`v4l2_bt_timings`
+
+replace define V4L2_DV_BT_STD_CEA861 dv-bt-standards
+replace define V4L2_DV_BT_STD_DMT dv-bt-standards
+replace define V4L2_DV_BT_STD_CVT dv-bt-standards
+replace define V4L2_DV_BT_STD_GTF dv-bt-standards
+replace define V4L2_DV_BT_STD_SDI dv-bt-standards
+
+replace define V4L2_DV_FL_REDUCED_BLANKING dv-bt-standards
+replace define V4L2_DV_FL_CAN_REDUCE_FPS dv-bt-standards
+replace define V4L2_DV_FL_CAN_DETECT_REDUCED_FPS dv-bt-standards
+replace define V4L2_DV_FL_REDUCED_FPS dv-bt-standards
+replace define V4L2_DV_FL_HALF_LINE dv-bt-standards
+replace define V4L2_DV_FL_IS_CE_VIDEO dv-bt-standards
+replace define V4L2_DV_FL_FIRST_FIELD_EXTRA_LINE dv-bt-standards
+replace define V4L2_DV_FL_HAS_PICTURE_ASPECT dv-bt-standards
+replace define V4L2_DV_FL_HAS_CEA861_VIC dv-bt-standards
+replace define V4L2_DV_FL_HAS_HDMI_VIC dv-bt-standards
+
+replace define V4L2_DV_BT_656_1120 dv-timing-types
+
+replace define V4L2_DV_BT_CAP_INTERLACED framebuffer-cap
+replace define V4L2_DV_BT_CAP_PROGRESSIVE framebuffer-cap
+replace define V4L2_DV_BT_CAP_REDUCED_BLANKING framebuffer-cap
+replace define V4L2_DV_BT_CAP_CUSTOM framebuffer-cap
+
+# V4L2 input
+
+replace define V4L2_INPUT_TYPE_TUNER input-type
+replace define V4L2_INPUT_TYPE_CAMERA input-type
+replace define V4L2_INPUT_TYPE_TOUCH input-type
+
+replace define V4L2_IN_ST_NO_POWER input-status
+replace define V4L2_IN_ST_NO_SIGNAL input-status
+replace define V4L2_IN_ST_NO_COLOR input-status
+replace define V4L2_IN_ST_HFLIP input-status
+replace define V4L2_IN_ST_VFLIP input-status
+replace define V4L2_IN_ST_NO_H_LOCK input-status
+replace define V4L2_IN_ST_COLOR_KILL input-status
+replace define V4L2_IN_ST_NO_SYNC input-status
+replace define V4L2_IN_ST_NO_EQU input-status
+replace define V4L2_IN_ST_NO_CARRIER input-status
+replace define V4L2_IN_ST_MACROVISION input-status
+replace define V4L2_IN_ST_NO_ACCESS input-status
+replace define V4L2_IN_ST_VTR input-status
+replace define V4L2_IN_ST_NO_V_LOCK input-status
+replace define V4L2_IN_ST_NO_STD_LOCK input-status
+
+replace define V4L2_IN_CAP_DV_TIMINGS input-capabilities
+replace define V4L2_IN_CAP_STD input-capabilities
+replace define V4L2_IN_CAP_NATIVE_SIZE input-capabilities
+
+# V4L2 output
+
+replace define V4L2_OUTPUT_TYPE_MODULATOR output-type
+replace define V4L2_OUTPUT_TYPE_ANALOG output-type
+replace define V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY output-type
+
+replace define V4L2_OUT_CAP_DV_TIMINGS output-capabilities
+replace define V4L2_OUT_CAP_STD output-capabilities
+replace define V4L2_OUT_CAP_NATIVE_SIZE output-capabilities
+
+# V4L2 control flags
+
+replace define V4L2_CTRL_FLAG_DISABLED control-flags
+replace define V4L2_CTRL_FLAG_GRABBED control-flags
+replace define V4L2_CTRL_FLAG_READ_ONLY control-flags
+replace define V4L2_CTRL_FLAG_UPDATE control-flags
+replace define V4L2_CTRL_FLAG_INACTIVE control-flags
+replace define V4L2_CTRL_FLAG_SLIDER control-flags
+replace define V4L2_CTRL_FLAG_WRITE_ONLY control-flags
+replace define V4L2_CTRL_FLAG_VOLATILE control-flags
+replace define V4L2_CTRL_FLAG_HAS_PAYLOAD control-flags
+replace define V4L2_CTRL_FLAG_EXECUTE_ON_WRITE control-flags
+replace define V4L2_CTRL_FLAG_MODIFY_LAYOUT control-flags
+
+replace define V4L2_CTRL_FLAG_NEXT_CTRL control
+replace define V4L2_CTRL_FLAG_NEXT_COMPOUND control
+replace define V4L2_CID_PRIVATE_BASE control
+
+# V4L2 tuner
+
+replace define V4L2_TUNER_CAP_LOW tuner-capability
+replace define V4L2_TUNER_CAP_NORM tuner-capability
+replace define V4L2_TUNER_CAP_HWSEEK_BOUNDED tuner-capability
+replace define V4L2_TUNER_CAP_HWSEEK_WRAP tuner-capability
+replace define V4L2_TUNER_CAP_STEREO tuner-capability
+replace define V4L2_TUNER_CAP_LANG2 tuner-capability
+replace define V4L2_TUNER_CAP_SAP tuner-capability
+replace define V4L2_TUNER_CAP_LANG1 tuner-capability
+replace define V4L2_TUNER_CAP_RDS tuner-capability
+replace define V4L2_TUNER_CAP_RDS_BLOCK_IO tuner-capability
+replace define V4L2_TUNER_CAP_RDS_CONTROLS tuner-capability
+replace define V4L2_TUNER_CAP_FREQ_BANDS tuner-capability
+replace define V4L2_TUNER_CAP_HWSEEK_PROG_LIM tuner-capability
+replace define V4L2_TUNER_CAP_1HZ tuner-capability
+
+replace define V4L2_TUNER_SUB_MONO tuner-rxsubchans
+replace define V4L2_TUNER_SUB_STEREO tuner-rxsubchans
+replace define V4L2_TUNER_SUB_LANG2 tuner-rxsubchans
+replace define V4L2_TUNER_SUB_SAP tuner-rxsubchans
+replace define V4L2_TUNER_SUB_LANG1 tuner-rxsubchans
+replace define V4L2_TUNER_SUB_RDS tuner-rxsubchans
+
+replace define V4L2_TUNER_MODE_MONO tuner-audmode
+replace define V4L2_TUNER_MODE_STEREO tuner-audmode
+replace define V4L2_TUNER_MODE_LANG2 tuner-audmode
+replace define V4L2_TUNER_MODE_SAP tuner-audmode
+replace define V4L2_TUNER_MODE_LANG1 tuner-audmode
+replace define V4L2_TUNER_MODE_LANG1_LANG2 tuner-audmode
+
+replace define V4L2_BAND_MODULATION_VSB band-modulation
+replace define V4L2_BAND_MODULATION_FM band-modulation
+replace define V4L2_BAND_MODULATION_AM band-modulation
+
+replace define V4L2_RDS_BLOCK_MSK v4l2-rds-block
+replace define V4L2_RDS_BLOCK_A v4l2-rds-block
+replace define V4L2_RDS_BLOCK_B v4l2-rds-block
+replace define V4L2_RDS_BLOCK_C v4l2-rds-block
+replace define V4L2_RDS_BLOCK_D v4l2-rds-block
+replace define V4L2_RDS_BLOCK_C_ALT v4l2-rds-block
+replace define V4L2_RDS_BLOCK_INVALID v4l2-rds-block
+replace define V4L2_RDS_BLOCK_CORRECTED v4l2-rds-block
+replace define V4L2_RDS_BLOCK_ERROR v4l2-rds-block
+
+# V4L2 audio
+
+replace define V4L2_AUDCAP_STEREO audio-capability
+replace define V4L2_AUDCAP_AVL audio-capability
+
+replace define V4L2_AUDMODE_AVL audio-mode
+
+# MPEG
+
+replace define V4L2_ENC_IDX_FRAME_I :c:type:`v4l2_enc_idx`
+replace define V4L2_ENC_IDX_FRAME_P :c:type:`v4l2_enc_idx`
+replace define V4L2_ENC_IDX_FRAME_B :c:type:`v4l2_enc_idx`
+replace define V4L2_ENC_IDX_FRAME_MASK :c:type:`v4l2_enc_idx`
+replace define V4L2_ENC_IDX_ENTRIES :c:type:`v4l2_enc_idx`
+
+replace define V4L2_ENC_CMD_START encoder-cmds
+replace define V4L2_ENC_CMD_STOP encoder-cmds
+replace define V4L2_ENC_CMD_PAUSE encoder-cmds
+replace define V4L2_ENC_CMD_RESUME encoder-cmds
+
+replace define V4L2_ENC_CMD_STOP_AT_GOP_END encoder-flags
+
+replace define V4L2_DEC_CMD_START decoder-cmds
+replace define V4L2_DEC_CMD_STOP decoder-cmds
+replace define V4L2_DEC_CMD_PAUSE decoder-cmds
+replace define V4L2_DEC_CMD_RESUME decoder-cmds
+replace define V4L2_DEC_CMD_FLUSH decoder-cmds
+
+replace define V4L2_DEC_CMD_START_MUTE_AUDIO decoder-cmds
+replace define V4L2_DEC_CMD_PAUSE_TO_BLACK decoder-cmds
+replace define V4L2_DEC_CMD_STOP_TO_BLACK decoder-cmds
+replace define V4L2_DEC_CMD_STOP_IMMEDIATELY decoder-cmds
+
+replace define V4L2_DEC_START_FMT_NONE decoder-cmds
+replace define V4L2_DEC_START_FMT_GOP decoder-cmds
+
+# V4L2 VBI
+
+replace define V4L2_VBI_UNSYNC vbifmt-flags
+replace define V4L2_VBI_INTERLACED vbifmt-flags
+
+replace define V4L2_VBI_ITU_525_F1_START :c:type:`v4l2_vbi_format`
+replace define V4L2_VBI_ITU_525_F2_START :c:type:`v4l2_vbi_format`
+replace define V4L2_VBI_ITU_625_F1_START :c:type:`v4l2_vbi_format`
+replace define V4L2_VBI_ITU_625_F2_START :c:type:`v4l2_vbi_format`
+
+
+replace define V4L2_SLICED_TELETEXT_B vbi-services
+replace define V4L2_SLICED_VPS vbi-services
+replace define V4L2_SLICED_CAPTION_525 vbi-services
+replace define V4L2_SLICED_WSS_625 vbi-services
+replace define V4L2_SLICED_VBI_525 vbi-services
+replace define V4L2_SLICED_VBI_625 vbi-services
+
+replace define V4L2_MPEG_VBI_IVTV_TELETEXT_B ITV0-Line-Identifier-Constants
+replace define V4L2_MPEG_VBI_IVTV_CAPTION_525 ITV0-Line-Identifier-Constants
+replace define V4L2_MPEG_VBI_IVTV_WSS_625 ITV0-Line-Identifier-Constants
+replace define V4L2_MPEG_VBI_IVTV_VPS ITV0-Line-Identifier-Constants
+
+replace define V4L2_MPEG_VBI_IVTV_MAGIC0 v4l2-mpeg-vbi-fmt-ivtv-magic
+replace define V4L2_MPEG_VBI_IVTV_MAGIC1 v4l2-mpeg-vbi-fmt-ivtv-magic
+
+# V4L2 events
+
+replace define V4L2_EVENT_ALL event-type
+replace define V4L2_EVENT_VSYNC event-type
+replace define V4L2_EVENT_EOS event-type
+replace define V4L2_EVENT_CTRL event-type
+replace define V4L2_EVENT_FRAME_SYNC event-type
+replace define V4L2_EVENT_SOURCE_CHANGE event-type
+replace define V4L2_EVENT_MOTION_DET event-type
+replace define V4L2_EVENT_PRIVATE_START event-type
+
+replace define V4L2_EVENT_CTRL_CH_VALUE ctrl-changes-flags
+replace define V4L2_EVENT_CTRL_CH_FLAGS ctrl-changes-flags
+replace define V4L2_EVENT_CTRL_CH_RANGE ctrl-changes-flags
+
+replace define V4L2_EVENT_SRC_CH_RESOLUTION src-changes-flags
+
+replace define V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ :c:type:`v4l2_event_motion_det`
+
+replace define V4L2_EVENT_SUB_FL_SEND_INITIAL event-flags
+replace define V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK event-flags
+
+# V4L2 debugging
+replace define V4L2_CHIP_MATCH_BRIDGE vidioc_dbg_g_register
+replace define V4L2_CHIP_MATCH_SUBDEV vidioc_dbg_g_register
+replace define V4L2_CHIP_MATCH_HOST vidioc_dbg_g_register
+replace define V4L2_CHIP_MATCH_I2C_DRIVER vidioc_dbg_g_register
+replace define V4L2_CHIP_MATCH_I2C_ADDR vidioc_dbg_g_register
+replace define V4L2_CHIP_MATCH_AC97 vidioc_dbg_g_register
+
+replace define V4L2_CHIP_FL_READABLE vidioc_dbg_g_register
+replace define V4L2_CHIP_FL_WRITABLE vidioc_dbg_g_register
+
+# Ignore reserved ioctl and ancillary macros
+
+ignore define VIDEO_MAX_FRAME
+ignore define VIDEO_MAX_PLANES
+ignore define v4l2_fourcc
+ignore define v4l2_fourcc_be
+ignore define V4L2_FIELD_HAS_TOP
+ignore define V4L2_FIELD_HAS_BOTTOM
+ignore define V4L2_FIELD_HAS_BOTH
+ignore define V4L2_FIELD_HAS_T_OR_B
+ignore define V4L2_TYPE_IS_MULTIPLANAR
+ignore define V4L2_TYPE_IS_OUTPUT
+ignore define V4L2_TUNER_ADC
+ignore define V4L2_MAP_COLORSPACE_DEFAULT
+ignore define V4L2_MAP_XFER_FUNC_DEFAULT
+ignore define V4L2_MAP_YCBCR_ENC_DEFAULT
+ignore define V4L2_DV_BT_BLANKING_WIDTH
+ignore define V4L2_DV_BT_FRAME_WIDTH
+ignore define V4L2_DV_BT_BLANKING_HEIGHT
+ignore define V4L2_DV_BT_FRAME_HEIGHT
+ignore define V4L2_IN_CAP_CUSTOM_TIMINGS
+ignore define V4L2_CTRL_ID_MASK
+ignore define V4L2_CTRL_ID2CLASS
+ignore define V4L2_CTRL_ID2WHICH
+ignore define V4L2_CTRL_DRIVER_PRIV
+ignore define V4L2_CTRL_MAX_DIMS
+ignore define V4L2_CTRL_WHICH_CUR_VAL
+ignore define V4L2_CTRL_WHICH_DEF_VAL
+ignore define V4L2_CTRL_WHICH_REQUEST_VAL
+ignore define V4L2_OUT_CAP_CUSTOM_TIMINGS
+ignore define V4L2_CID_MAX_CTRLS
+
+ignore define BASE_VIDIOC_PRIVATE
+
+# Associate ioctls with their counterparts
+replace ioctl VIDIOC_DBG_S_REGISTER vidioc_dbg_g_register
+replace ioctl VIDIOC_DQBUF vidioc_qbuf
+replace ioctl VIDIOC_S_AUDOUT vidioc_g_audout
+replace ioctl VIDIOC_S_CROP vidioc_g_crop
+replace ioctl VIDIOC_S_CTRL vidioc_g_ctrl
+replace ioctl VIDIOC_S_DV_TIMINGS vidioc_g_dv_timings
+replace ioctl VIDIOC_S_EDID vidioc_g_edid
+replace ioctl VIDIOC_S_EXT_CTRLS vidioc_g_ext_ctrls
+replace ioctl VIDIOC_S_FBUF vidioc_g_fbuf
+replace ioctl VIDIOC_S_FMT vidioc_g_fmt
+replace ioctl VIDIOC_S_FREQUENCY vidioc_g_frequency
+replace ioctl VIDIOC_S_INPUT vidioc_g_input
+replace ioctl VIDIOC_S_JPEGCOMP vidioc_g_jpegcomp
+replace ioctl VIDIOC_S_MODULATOR vidioc_g_modulator
+replace ioctl VIDIOC_S_OUTPUT vidioc_g_output
+replace ioctl VIDIOC_S_PARM vidioc_g_parm
+replace ioctl VIDIOC_S_PRIORITY vidioc_g_priority
+replace ioctl VIDIOC_S_SELECTION vidioc_g_selection
+replace ioctl VIDIOC_S_STD vidioc_g_std
+replace ioctl VIDIOC_S_AUDIO vidioc_g_audio
+replace ioctl VIDIOC_S_TUNER vidioc_g_tuner
+replace ioctl VIDIOC_TRY_DECODER_CMD vidioc_decoder_cmd
+replace ioctl VIDIOC_TRY_ENCODER_CMD vidioc_encoder_cmd
+replace ioctl VIDIOC_TRY_EXT_CTRLS vidioc_g_ext_ctrls
+replace ioctl VIDIOC_TRY_FMT vidioc_g_fmt
+replace ioctl VIDIOC_STREAMOFF vidioc_streamon
+replace ioctl VIDIOC_QUERY_EXT_CTRL vidioc_queryctrl
+replace ioctl VIDIOC_QUERYMENU vidioc_queryctrl
diff --git a/Documentation/userspace-api/no_new_privs.rst b/Documentation/userspace-api/no_new_privs.rst
new file mode 100644
index 000000000..d060ea217
--- /dev/null
+++ b/Documentation/userspace-api/no_new_privs.rst
@@ -0,0 +1,63 @@
+======================
+No New Privileges Flag
+======================
+
+The execve system call can grant a newly-started program privileges that
+its parent did not have.  The most obvious examples are setuid/setgid
+programs and file capabilities.  To prevent the parent program from
+gaining these privileges as well, the kernel and user code must be
+careful to prevent the parent from doing anything that could subvert the
+child.  For example:
+
+ - The dynamic loader handles ``LD_*`` environment variables differently if
+   a program is setuid.
+
+ - chroot is disallowed to unprivileged processes, since it would allow
+   ``/etc/passwd`` to be replaced from the point of view of a process that
+   inherited chroot.
+
+ - The exec code has special handling for ptrace.
+
+These are all ad-hoc fixes.  The ``no_new_privs`` bit (since Linux 3.5) is a
+new, generic mechanism to make it safe for a process to modify its
+execution environment in a manner that persists across execve.  Any task
+can set ``no_new_privs``.  Once the bit is set, it is inherited across fork,
+clone, and execve and cannot be unset.  With ``no_new_privs`` set, ``execve()``
+promises not to grant the privilege to do anything that could not have
+been done without the execve call.  For example, the setuid and setgid
+bits will no longer change the uid or gid; file capabilities will not
+add to the permitted set, and LSMs will not relax constraints after
+execve.
+
+To set ``no_new_privs``, use::
+
+    prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
+
+Be careful, though: LSMs might also not tighten constraints on exec
+in ``no_new_privs`` mode.  (This means that setting up a general-purpose
+service launcher to set ``no_new_privs`` before execing daemons may
+interfere with LSM-based sandboxing.)
+
+Note that ``no_new_privs`` does not prevent privilege changes that do not
+involve ``execve()``.  An appropriately privileged task can still call
+``setuid(2)`` and receive SCM_RIGHTS datagrams.
+
+There are two main use cases for ``no_new_privs`` so far:
+
+ - Filters installed for the seccomp mode 2 sandbox persist across
+   execve and can change the behavior of newly-executed programs.
+   Unprivileged users are therefore only allowed to install such filters
+   if ``no_new_privs`` is set.
+
+ - By itself, ``no_new_privs`` can be used to reduce the attack surface
+   available to an unprivileged user.  If everything running with a
+   given uid has ``no_new_privs`` set, then that uid will be unable to
+   escalate its privileges by directly attacking setuid, setgid, and
+   fcap-using binaries; it will need to compromise something without the
+   ``no_new_privs`` bit set first.
+
+In the future, other potentially dangerous kernel features could become
+available to unprivileged tasks if ``no_new_privs`` is set.  In principle,
+several options to ``unshare(2)`` and ``clone(2)`` would be safe when
+``no_new_privs`` is set, and ``no_new_privs`` + ``chroot`` is considerable less
+dangerous than chroot by itself.
diff --git a/Documentation/userspace-api/seccomp_filter.rst b/Documentation/userspace-api/seccomp_filter.rst
new file mode 100644
index 000000000..6efb41cc8
--- /dev/null
+++ b/Documentation/userspace-api/seccomp_filter.rst
@@ -0,0 +1,354 @@
+===========================================
+Seccomp BPF (SECure COMPuting with filters)
+===========================================
+
+Introduction
+============
+
+A large number of system calls are exposed to every userland process
+with many of them going unused for the entire lifetime of the process.
+As system calls change and mature, bugs are found and eradicated.  A
+certain subset of userland applications benefit by having a reduced set
+of available system calls.  The resulting set reduces the total kernel
+surface exposed to the application.  System call filtering is meant for
+use with those applications.
+
+Seccomp filtering provides a means for a process to specify a filter for
+incoming system calls.  The filter is expressed as a Berkeley Packet
+Filter (BPF) program, as with socket filters, except that the data
+operated on is related to the system call being made: system call
+number and the system call arguments.  This allows for expressive
+filtering of system calls using a filter program language with a long
+history of being exposed to userland and a straightforward data set.
+
+Additionally, BPF makes it impossible for users of seccomp to fall prey
+to time-of-check-time-of-use (TOCTOU) attacks that are common in system
+call interposition frameworks.  BPF programs may not dereference
+pointers which constrains all filters to solely evaluating the system
+call arguments directly.
+
+What it isn't
+=============
+
+System call filtering isn't a sandbox.  It provides a clearly defined
+mechanism for minimizing the exposed kernel surface.  It is meant to be
+a tool for sandbox developers to use.  Beyond that, policy for logical
+behavior and information flow should be managed with a combination of
+other system hardening techniques and, potentially, an LSM of your
+choosing.  Expressive, dynamic filters provide further options down this
+path (avoiding pathological sizes or selecting which of the multiplexed
+system calls in socketcall() is allowed, for instance) which could be
+construed, incorrectly, as a more complete sandboxing solution.
+
+Usage
+=====
+
+An additional seccomp mode is added and is enabled using the same
+prctl(2) call as the strict seccomp.  If the architecture has
+``CONFIG_HAVE_ARCH_SECCOMP_FILTER``, then filters may be added as below:
+
+``PR_SET_SECCOMP``:
+	Now takes an additional argument which specifies a new filter
+	using a BPF program.
+	The BPF program will be executed over struct seccomp_data
+	reflecting the system call number, arguments, and other
+	metadata.  The BPF program must then return one of the
+	acceptable values to inform the kernel which action should be
+	taken.
+
+	Usage::
+
+		prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, prog);
+
+	The 'prog' argument is a pointer to a struct sock_fprog which
+	will contain the filter program.  If the program is invalid, the
+	call will return -1 and set errno to ``EINVAL``.
+
+	If ``fork``/``clone`` and ``execve`` are allowed by @prog, any child
+	processes will be constrained to the same filters and system
+	call ABI as the parent.
+
+	Prior to use, the task must call ``prctl(PR_SET_NO_NEW_PRIVS, 1)`` or
+	run with ``CAP_SYS_ADMIN`` privileges in its namespace.  If these are not
+	true, ``-EACCES`` will be returned.  This requirement ensures that filter
+	programs cannot be applied to child processes with greater privileges
+	than the task that installed them.
+
+	Additionally, if ``prctl(2)`` is allowed by the attached filter,
+	additional filters may be layered on which will increase evaluation
+	time, but allow for further decreasing the attack surface during
+	execution of a process.
+
+The above call returns 0 on success and non-zero on error.
+
+Return values
+=============
+
+A seccomp filter may return any of the following values. If multiple
+filters exist, the return value for the evaluation of a given system
+call will always use the highest precedent value. (For example,
+``SECCOMP_RET_KILL_PROCESS`` will always take precedence.)
+
+In precedence order, they are:
+
+``SECCOMP_RET_KILL_PROCESS``:
+	Results in the entire process exiting immediately without executing
+	the system call.  The exit status of the task (``status & 0x7f``)
+	will be ``SIGSYS``, not ``SIGKILL``.
+
+``SECCOMP_RET_KILL_THREAD``:
+	Results in the task exiting immediately without executing the
+	system call.  The exit status of the task (``status & 0x7f``) will
+	be ``SIGSYS``, not ``SIGKILL``.
+
+``SECCOMP_RET_TRAP``:
+	Results in the kernel sending a ``SIGSYS`` signal to the triggering
+	task without executing the system call. ``siginfo->si_call_addr``
+	will show the address of the system call instruction, and
+	``siginfo->si_syscall`` and ``siginfo->si_arch`` will indicate which
+	syscall was attempted.  The program counter will be as though
+	the syscall happened (i.e. it will not point to the syscall
+	instruction).  The return value register will contain an arch-
+	dependent value -- if resuming execution, set it to something
+	sensible.  (The architecture dependency is because replacing
+	it with ``-ENOSYS`` could overwrite some useful information.)
+
+	The ``SECCOMP_RET_DATA`` portion of the return value will be passed
+	as ``si_errno``.
+
+	``SIGSYS`` triggered by seccomp will have a si_code of ``SYS_SECCOMP``.
+
+``SECCOMP_RET_ERRNO``:
+	Results in the lower 16-bits of the return value being passed
+	to userland as the errno without executing the system call.
+
+``SECCOMP_RET_USER_NOTIF``:
+	Results in a ``struct seccomp_notif`` message sent on the userspace
+	notification fd, if it is attached, or ``-ENOSYS`` if it is not. See
+	below on discussion of how to handle user notifications.
+
+``SECCOMP_RET_TRACE``:
+	When returned, this value will cause the kernel to attempt to
+	notify a ``ptrace()``-based tracer prior to executing the system
+	call.  If there is no tracer present, ``-ENOSYS`` is returned to
+	userland and the system call is not executed.
+
+	A tracer will be notified if it requests ``PTRACE_O_TRACESECCOMP``
+	using ``ptrace(PTRACE_SETOPTIONS)``.  The tracer will be notified
+	of a ``PTRACE_EVENT_SECCOMP`` and the ``SECCOMP_RET_DATA`` portion of
+	the BPF program return value will be available to the tracer
+	via ``PTRACE_GETEVENTMSG``.
+
+	The tracer can skip the system call by changing the syscall number
+	to -1.  Alternatively, the tracer can change the system call
+	requested by changing the system call to a valid syscall number.  If
+	the tracer asks to skip the system call, then the system call will
+	appear to return the value that the tracer puts in the return value
+	register.
+
+	The seccomp check will not be run again after the tracer is
+	notified.  (This means that seccomp-based sandboxes MUST NOT
+	allow use of ptrace, even of other sandboxed processes, without
+	extreme care; ptracers can use this mechanism to escape.)
+
+``SECCOMP_RET_LOG``:
+	Results in the system call being executed after it is logged. This
+	should be used by application developers to learn which syscalls their
+	application needs without having to iterate through multiple test and
+	development cycles to build the list.
+
+	This action will only be logged if "log" is present in the
+	actions_logged sysctl string.
+
+``SECCOMP_RET_ALLOW``:
+	Results in the system call being executed.
+
+If multiple filters exist, the return value for the evaluation of a
+given system call will always use the highest precedent value.
+
+Precedence is only determined using the ``SECCOMP_RET_ACTION`` mask.  When
+multiple filters return values of the same precedence, only the
+``SECCOMP_RET_DATA`` from the most recently installed filter will be
+returned.
+
+Pitfalls
+========
+
+The biggest pitfall to avoid during use is filtering on system call
+number without checking the architecture value.  Why?  On any
+architecture that supports multiple system call invocation conventions,
+the system call numbers may vary based on the specific invocation.  If
+the numbers in the different calling conventions overlap, then checks in
+the filters may be abused.  Always check the arch value!
+
+Example
+=======
+
+The ``samples/seccomp/`` directory contains both an x86-specific example
+and a more generic example of a higher level macro interface for BPF
+program generation.
+
+Userspace Notification
+======================
+
+The ``SECCOMP_RET_USER_NOTIF`` return code lets seccomp filters pass a
+particular syscall to userspace to be handled. This may be useful for
+applications like container managers, which wish to intercept particular
+syscalls (``mount()``, ``finit_module()``, etc.) and change their behavior.
+
+To acquire a notification FD, use the ``SECCOMP_FILTER_FLAG_NEW_LISTENER``
+argument to the ``seccomp()`` syscall:
+
+.. code-block:: c
+
+    fd = seccomp(SECCOMP_SET_MODE_FILTER, SECCOMP_FILTER_FLAG_NEW_LISTENER, &prog);
+
+which (on success) will return a listener fd for the filter, which can then be
+passed around via ``SCM_RIGHTS`` or similar. Note that filter fds correspond to
+a particular filter, and not a particular task. So if this task then forks,
+notifications from both tasks will appear on the same filter fd. Reads and
+writes to/from a filter fd are also synchronized, so a filter fd can safely
+have many readers.
+
+The interface for a seccomp notification fd consists of two structures:
+
+.. code-block:: c
+
+    struct seccomp_notif_sizes {
+        __u16 seccomp_notif;
+        __u16 seccomp_notif_resp;
+        __u16 seccomp_data;
+    };
+
+    struct seccomp_notif {
+        __u64 id;
+        __u32 pid;
+        __u32 flags;
+        struct seccomp_data data;
+    };
+
+    struct seccomp_notif_resp {
+        __u64 id;
+        __s64 val;
+        __s32 error;
+        __u32 flags;
+    };
+
+The ``struct seccomp_notif_sizes`` structure can be used to determine the size
+of the various structures used in seccomp notifications. The size of ``struct
+seccomp_data`` may change in the future, so code should use:
+
+.. code-block:: c
+
+    struct seccomp_notif_sizes sizes;
+    seccomp(SECCOMP_GET_NOTIF_SIZES, 0, &sizes);
+
+to determine the size of the various structures to allocate. See
+samples/seccomp/user-trap.c for an example.
+
+Users can read via ``ioctl(SECCOMP_IOCTL_NOTIF_RECV)``  (or ``poll()``) on a
+seccomp notification fd to receive a ``struct seccomp_notif``, which contains
+five members: the input length of the structure, a unique-per-filter ``id``,
+the ``pid`` of the task which triggered this request (which may be 0 if the
+task is in a pid ns not visible from the listener's pid namespace). The
+notification also contains the ``data`` passed to seccomp, and a filters flag.
+The structure should be zeroed out prior to calling the ioctl.
+
+Userspace can then make a decision based on this information about what to do,
+and ``ioctl(SECCOMP_IOCTL_NOTIF_SEND)`` a response, indicating what should be
+returned to userspace. The ``id`` member of ``struct seccomp_notif_resp`` should
+be the same ``id`` as in ``struct seccomp_notif``.
+
+It is worth noting that ``struct seccomp_data`` contains the values of register
+arguments to the syscall, but does not contain pointers to memory. The task's
+memory is accessible to suitably privileged traces via ``ptrace()`` or
+``/proc/pid/mem``. However, care should be taken to avoid the TOCTOU mentioned
+above in this document: all arguments being read from the tracee's memory
+should be read into the tracer's memory before any policy decisions are made.
+This allows for an atomic decision on syscall arguments.
+
+Sysctls
+=======
+
+Seccomp's sysctl files can be found in the ``/proc/sys/kernel/seccomp/``
+directory. Here's a description of each file in that directory:
+
+``actions_avail``:
+	A read-only ordered list of seccomp return values (refer to the
+	``SECCOMP_RET_*`` macros above) in string form. The ordering, from
+	left-to-right, is the least permissive return value to the most
+	permissive return value.
+
+	The list represents the set of seccomp return values supported
+	by the kernel. A userspace program may use this list to
+	determine if the actions found in the ``seccomp.h``, when the
+	program was built, differs from the set of actions actually
+	supported in the current running kernel.
+
+``actions_logged``:
+	A read-write ordered list of seccomp return values (refer to the
+	``SECCOMP_RET_*`` macros above) that are allowed to be logged. Writes
+	to the file do not need to be in ordered form but reads from the file
+	will be ordered in the same way as the actions_avail sysctl.
+
+	The ``allow`` string is not accepted in the ``actions_logged`` sysctl
+	as it is not possible to log ``SECCOMP_RET_ALLOW`` actions. Attempting
+	to write ``allow`` to the sysctl will result in an EINVAL being
+	returned.
+
+Adding architecture support
+===========================
+
+See ``arch/Kconfig`` for the authoritative requirements.  In general, if an
+architecture supports both ptrace_event and seccomp, it will be able to
+support seccomp filter with minor fixup: ``SIGSYS`` support and seccomp return
+value checking.  Then it must just add ``CONFIG_HAVE_ARCH_SECCOMP_FILTER``
+to its arch-specific Kconfig.
+
+
+
+Caveats
+=======
+
+The vDSO can cause some system calls to run entirely in userspace,
+leading to surprises when you run programs on different machines that
+fall back to real syscalls.  To minimize these surprises on x86, make
+sure you test with
+``/sys/devices/system/clocksource/clocksource0/current_clocksource`` set to
+something like ``acpi_pm``.
+
+On x86-64, vsyscall emulation is enabled by default.  (vsyscalls are
+legacy variants on vDSO calls.)  Currently, emulated vsyscalls will
+honor seccomp, with a few oddities:
+
+- A return value of ``SECCOMP_RET_TRAP`` will set a ``si_call_addr`` pointing to
+  the vsyscall entry for the given call and not the address after the
+  'syscall' instruction.  Any code which wants to restart the call
+  should be aware that (a) a ret instruction has been emulated and (b)
+  trying to resume the syscall will again trigger the standard vsyscall
+  emulation security checks, making resuming the syscall mostly
+  pointless.
+
+- A return value of ``SECCOMP_RET_TRACE`` will signal the tracer as usual,
+  but the syscall may not be changed to another system call using the
+  orig_rax register. It may only be changed to -1 order to skip the
+  currently emulated call. Any other change MAY terminate the process.
+  The rip value seen by the tracer will be the syscall entry address;
+  this is different from normal behavior.  The tracer MUST NOT modify
+  rip or rsp.  (Do not rely on other changes terminating the process.
+  They might work.  For example, on some kernels, choosing a syscall
+  that only exists in future kernels will be correctly emulated (by
+  returning ``-ENOSYS``).
+
+To detect this quirky behavior, check for ``addr & ~0x0C00 ==
+0xFFFFFFFFFF600000``.  (For ``SECCOMP_RET_TRACE``, use rip.  For
+``SECCOMP_RET_TRAP``, use ``siginfo->si_call_addr``.)  Do not check any other
+condition: future kernels may improve vsyscall emulation and current
+kernels in vsyscall=native mode will behave differently, but the
+instructions at ``0xF...F600{0,4,8,C}00`` will not be system calls in these
+cases.
+
+Note that modern systems are unlikely to use vsyscalls at all -- they
+are a legacy feature and they are considerably slower than standard
+syscalls.  New code will use the vDSO, and vDSO-issued system calls
+are indistinguishable from normal system calls.
diff --git a/Documentation/userspace-api/spec_ctrl.rst b/Documentation/userspace-api/spec_ctrl.rst
new file mode 100644
index 000000000..7ddd8f667
--- /dev/null
+++ b/Documentation/userspace-api/spec_ctrl.rst
@@ -0,0 +1,108 @@
+===================
+Speculation Control
+===================
+
+Quite some CPUs have speculation-related misfeatures which are in
+fact vulnerabilities causing data leaks in various forms even across
+privilege domains.
+
+The kernel provides mitigation for such vulnerabilities in various
+forms. Some of these mitigations are compile-time configurable and some
+can be supplied on the kernel command line.
+
+There is also a class of mitigations which are very expensive, but they can
+be restricted to a certain set of processes or tasks in controlled
+environments. The mechanism to control these mitigations is via
+:manpage:`prctl(2)`.
+
+There are two prctl options which are related to this:
+
+ * PR_GET_SPECULATION_CTRL
+
+ * PR_SET_SPECULATION_CTRL
+
+PR_GET_SPECULATION_CTRL
+-----------------------
+
+PR_GET_SPECULATION_CTRL returns the state of the speculation misfeature
+which is selected with arg2 of prctl(2). The return value uses bits 0-3 with
+the following meaning:
+
+==== ====================== ==================================================
+Bit  Define                 Description
+==== ====================== ==================================================
+0    PR_SPEC_PRCTL          Mitigation can be controlled per task by
+                            PR_SET_SPECULATION_CTRL.
+1    PR_SPEC_ENABLE         The speculation feature is enabled, mitigation is
+                            disabled.
+2    PR_SPEC_DISABLE        The speculation feature is disabled, mitigation is
+                            enabled.
+3    PR_SPEC_FORCE_DISABLE  Same as PR_SPEC_DISABLE, but cannot be undone. A
+                            subsequent prctl(..., PR_SPEC_ENABLE) will fail.
+4    PR_SPEC_DISABLE_NOEXEC Same as PR_SPEC_DISABLE, but the state will be
+                            cleared on :manpage:`execve(2)`.
+==== ====================== ==================================================
+
+If all bits are 0 the CPU is not affected by the speculation misfeature.
+
+If PR_SPEC_PRCTL is set, then the per-task control of the mitigation is
+available. If not set, prctl(PR_SET_SPECULATION_CTRL) for the speculation
+misfeature will fail.
+
+.. _set_spec_ctrl:
+
+PR_SET_SPECULATION_CTRL
+-----------------------
+
+PR_SET_SPECULATION_CTRL allows to control the speculation misfeature, which
+is selected by arg2 of :manpage:`prctl(2)` per task. arg3 is used to hand
+in the control value, i.e. either PR_SPEC_ENABLE or PR_SPEC_DISABLE or
+PR_SPEC_FORCE_DISABLE.
+
+Common error codes
+------------------
+======= =================================================================
+Value   Meaning
+======= =================================================================
+EINVAL  The prctl is not implemented by the architecture or unused
+        prctl(2) arguments are not 0.
+
+ENODEV  arg2 is selecting a not supported speculation misfeature.
+======= =================================================================
+
+PR_SET_SPECULATION_CTRL error codes
+-----------------------------------
+======= =================================================================
+Value   Meaning
+======= =================================================================
+0       Success
+
+ERANGE  arg3 is incorrect, i.e. it's neither PR_SPEC_ENABLE nor
+        PR_SPEC_DISABLE nor PR_SPEC_FORCE_DISABLE.
+
+ENXIO   Control of the selected speculation misfeature is not possible.
+        See PR_GET_SPECULATION_CTRL.
+
+EPERM   Speculation was disabled with PR_SPEC_FORCE_DISABLE and caller
+        tried to enable it again.
+======= =================================================================
+
+Speculation misfeature controls
+-------------------------------
+- PR_SPEC_STORE_BYPASS: Speculative Store Bypass
+
+  Invocations:
+   * prctl(PR_GET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, 0, 0, 0);
+   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_ENABLE, 0, 0);
+   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_DISABLE, 0, 0);
+   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_FORCE_DISABLE, 0, 0);
+   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_DISABLE_NOEXEC, 0, 0);
+
+- PR_SPEC_INDIR_BRANCH: Indirect Branch Speculation in User Processes
+                        (Mitigate Spectre V2 style attacks against user processes)
+
+  Invocations:
+   * prctl(PR_GET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, 0, 0, 0);
+   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_ENABLE, 0, 0);
+   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_DISABLE, 0, 0);
+   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_FORCE_DISABLE, 0, 0);
diff --git a/Documentation/userspace-api/unshare.rst b/Documentation/userspace-api/unshare.rst
new file mode 100644
index 000000000..877e90a35
--- /dev/null
+++ b/Documentation/userspace-api/unshare.rst
@@ -0,0 +1,332 @@
+unshare system call
+===================
+
+This document describes the new system call, unshare(). The document
+provides an overview of the feature, why it is needed, how it can
+be used, its interface specification, design, implementation and
+how it can be tested.
+
+Change Log
+----------
+version 0.1  Initial document, Janak Desai (janak@us.ibm.com), Jan 11, 2006
+
+Contents
+--------
+	1) Overview
+	2) Benefits
+	3) Cost
+	4) Requirements
+	5) Functional Specification
+	6) High Level Design
+	7) Low Level Design
+	8) Test Specification
+	9) Future Work
+
+1) Overview
+-----------
+
+Most legacy operating system kernels support an abstraction of threads
+as multiple execution contexts within a process. These kernels provide
+special resources and mechanisms to maintain these "threads". The Linux
+kernel, in a clever and simple manner, does not make distinction
+between processes and "threads". The kernel allows processes to share
+resources and thus they can achieve legacy "threads" behavior without
+requiring additional data structures and mechanisms in the kernel. The
+power of implementing threads in this manner comes not only from
+its simplicity but also from allowing application programmers to work
+outside the confinement of all-or-nothing shared resources of legacy
+threads. On Linux, at the time of thread creation using the clone system
+call, applications can selectively choose which resources to share
+between threads.
+
+unshare() system call adds a primitive to the Linux thread model that
+allows threads to selectively 'unshare' any resources that were being
+shared at the time of their creation. unshare() was conceptualized by
+Al Viro in the August of 2000, on the Linux-Kernel mailing list, as part
+of the discussion on POSIX threads on Linux.  unshare() augments the
+usefulness of Linux threads for applications that would like to control
+shared resources without creating a new process. unshare() is a natural
+addition to the set of available primitives on Linux that implement
+the concept of process/thread as a virtual machine.
+
+2) Benefits
+-----------
+
+unshare() would be useful to large application frameworks such as PAM
+where creating a new process to control sharing/unsharing of process
+resources is not possible. Since namespaces are shared by default
+when creating a new process using fork or clone, unshare() can benefit
+even non-threaded applications if they have a need to disassociate
+from default shared namespace. The following lists two use-cases
+where unshare() can be used.
+
+2.1 Per-security context namespaces
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+unshare() can be used to implement polyinstantiated directories using
+the kernel's per-process namespace mechanism. Polyinstantiated directories,
+such as per-user and/or per-security context instance of /tmp, /var/tmp or
+per-security context instance of a user's home directory, isolate user
+processes when working with these directories. Using unshare(), a PAM
+module can easily setup a private namespace for a user at login.
+Polyinstantiated directories are required for Common Criteria certification
+with Labeled System Protection Profile, however, with the availability
+of shared-tree feature in the Linux kernel, even regular Linux systems
+can benefit from setting up private namespaces at login and
+polyinstantiating /tmp, /var/tmp and other directories deemed
+appropriate by system administrators.
+
+2.2 unsharing of virtual memory and/or open files
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Consider a client/server application where the server is processing
+client requests by creating processes that share resources such as
+virtual memory and open files. Without unshare(), the server has to
+decide what needs to be shared at the time of creating the process
+which services the request. unshare() allows the server an ability to
+disassociate parts of the context during the servicing of the
+request. For large and complex middleware application frameworks, this
+ability to unshare() after the process was created can be very
+useful.
+
+3) Cost
+-------
+
+In order to not duplicate code and to handle the fact that unshare()
+works on an active task (as opposed to clone/fork working on a newly
+allocated inactive task) unshare() had to make minor reorganizational
+changes to copy_* functions utilized by clone/fork system call.
+There is a cost associated with altering existing, well tested and
+stable code to implement a new feature that may not get exercised
+extensively in the beginning. However, with proper design and code
+review of the changes and creation of an unshare() test for the LTP
+the benefits of this new feature can exceed its cost.
+
+4) Requirements
+---------------
+
+unshare() reverses sharing that was done using clone(2) system call,
+so unshare() should have a similar interface as clone(2). That is,
+since flags in clone(int flags, void \*stack) specifies what should
+be shared, similar flags in unshare(int flags) should specify
+what should be unshared. Unfortunately, this may appear to invert
+the meaning of the flags from the way they are used in clone(2).
+However, there was no easy solution that was less confusing and that
+allowed incremental context unsharing in future without an ABI change.
+
+unshare() interface should accommodate possible future addition of
+new context flags without requiring a rebuild of old applications.
+If and when new context flags are added, unshare() design should allow
+incremental unsharing of those resources on an as needed basis.
+
+5) Functional Specification
+---------------------------
+
+NAME
+	unshare - disassociate parts of the process execution context
+
+SYNOPSIS
+	#include <sched.h>
+
+	int unshare(int flags);
+
+DESCRIPTION
+	unshare() allows a process to disassociate parts of its execution
+	context that are currently being shared with other processes. Part
+	of execution context, such as the namespace, is shared by default
+	when a new process is created using fork(2), while other parts,
+	such as the virtual memory, open file descriptors, etc, may be
+	shared by explicit request to share them when creating a process
+	using clone(2).
+
+	The main use of unshare() is to allow a process to control its
+	shared execution context without creating a new process.
+
+	The flags argument specifies one or bitwise-or'ed of several of
+	the following constants.
+
+	CLONE_FS
+		If CLONE_FS is set, file system information of the caller
+		is disassociated from the shared file system information.
+
+	CLONE_FILES
+		If CLONE_FILES is set, the file descriptor table of the
+		caller is disassociated from the shared file descriptor
+		table.
+
+	CLONE_NEWNS
+		If CLONE_NEWNS is set, the namespace of the caller is
+		disassociated from the shared namespace.
+
+	CLONE_VM
+		If CLONE_VM is set, the virtual memory of the caller is
+		disassociated from the shared virtual memory.
+
+RETURN VALUE
+	On success, zero returned. On failure, -1 is returned and errno is
+
+ERRORS
+	EPERM	CLONE_NEWNS was specified by a non-root process (process
+		without CAP_SYS_ADMIN).
+
+	ENOMEM	Cannot allocate sufficient memory to copy parts of caller's
+		context that need to be unshared.
+
+	EINVAL	Invalid flag was specified as an argument.
+
+CONFORMING TO
+	The unshare() call is Linux-specific and  should  not be used
+	in programs intended to be portable.
+
+SEE ALSO
+	clone(2), fork(2)
+
+6) High Level Design
+--------------------
+
+Depending on the flags argument, the unshare() system call allocates
+appropriate process context structures, populates it with values from
+the current shared version, associates newly duplicated structures
+with the current task structure and releases corresponding shared
+versions. Helper functions of clone (copy_*) could not be used
+directly by unshare() because of the following two reasons.
+
+  1) clone operates on a newly allocated not-yet-active task
+     structure, where as unshare() operates on the current active
+     task. Therefore unshare() has to take appropriate task_lock()
+     before associating newly duplicated context structures
+
+  2) unshare() has to allocate and duplicate all context structures
+     that are being unshared, before associating them with the
+     current task and releasing older shared structures. Failure
+     do so will create race conditions and/or oops when trying
+     to backout due to an error. Consider the case of unsharing
+     both virtual memory and namespace. After successfully unsharing
+     vm, if the system call encounters an error while allocating
+     new namespace structure, the error return code will have to
+     reverse the unsharing of vm. As part of the reversal the
+     system call will have to go back to older, shared, vm
+     structure, which may not exist anymore.
+
+Therefore code from copy_* functions that allocated and duplicated
+current context structure was moved into new dup_* functions. Now,
+copy_* functions call dup_* functions to allocate and duplicate
+appropriate context structures and then associate them with the
+task structure that is being constructed. unshare() system call on
+the other hand performs the following:
+
+  1) Check flags to force missing, but implied, flags
+
+  2) For each context structure, call the corresponding unshare()
+     helper function to allocate and duplicate a new context
+     structure, if the appropriate bit is set in the flags argument.
+
+  3) If there is no error in allocation and duplication and there
+     are new context structures then lock the current task structure,
+     associate new context structures with the current task structure,
+     and release the lock on the current task structure.
+
+  4) Appropriately release older, shared, context structures.
+
+7) Low Level Design
+-------------------
+
+Implementation of unshare() can be grouped in the following 4 different
+items:
+
+  a) Reorganization of existing copy_* functions
+
+  b) unshare() system call service function
+
+  c) unshare() helper functions for each different process context
+
+  d) Registration of system call number for different architectures
+
+7.1) Reorganization of copy_* functions
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Each copy function such as copy_mm, copy_namespace, copy_files,
+etc, had roughly two components. The first component allocated
+and duplicated the appropriate structure and the second component
+linked it to the task structure passed in as an argument to the copy
+function. The first component was split into its own function.
+These dup_* functions allocated and duplicated the appropriate
+context structure. The reorganized copy_* functions invoked
+their corresponding dup_* functions and then linked the newly
+duplicated structures to the task structure with which the
+copy function was called.
+
+7.2) unshare() system call service function
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+       * Check flags
+	 Force implied flags. If CLONE_THREAD is set force CLONE_VM.
+	 If CLONE_VM is set, force CLONE_SIGHAND. If CLONE_SIGHAND is
+	 set and signals are also being shared, force CLONE_THREAD. If
+	 CLONE_NEWNS is set, force CLONE_FS.
+
+       * For each context flag, invoke the corresponding unshare_*
+	 helper routine with flags passed into the system call and a
+	 reference to pointer pointing the new unshared structure
+
+       * If any new structures are created by unshare_* helper
+	 functions, take the task_lock() on the current task,
+	 modify appropriate context pointers, and release the
+         task lock.
+
+       * For all newly unshared structures, release the corresponding
+         older, shared, structures.
+
+7.3) unshare_* helper functions
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+For unshare_* helpers corresponding to CLONE_SYSVSEM, CLONE_SIGHAND,
+and CLONE_THREAD, return -EINVAL since they are not implemented yet.
+For others, check the flag value to see if the unsharing is
+required for that structure. If it is, invoke the corresponding
+dup_* function to allocate and duplicate the structure and return
+a pointer to it.
+
+7.4) Finally
+~~~~~~~~~~~~
+
+Appropriately modify architecture specific code to register the
+new system call.
+
+8) Test Specification
+---------------------
+
+The test for unshare() should test the following:
+
+  1) Valid flags: Test to check that clone flags for signal and
+     signal handlers, for which unsharing is not implemented
+     yet, return -EINVAL.
+
+  2) Missing/implied flags: Test to make sure that if unsharing
+     namespace without specifying unsharing of filesystem, correctly
+     unshares both namespace and filesystem information.
+
+  3) For each of the four (namespace, filesystem, files and vm)
+     supported unsharing, verify that the system call correctly
+     unshares the appropriate structure. Verify that unsharing
+     them individually as well as in combination with each
+     other works as expected.
+
+  4) Concurrent execution: Use shared memory segments and futex on
+     an address in the shm segment to synchronize execution of
+     about 10 threads. Have a couple of threads execute execve,
+     a couple _exit and the rest unshare with different combination
+     of flags. Verify that unsharing is performed as expected and
+     that there are no oops or hangs.
+
+9) Future Work
+--------------
+
+The current implementation of unshare() does not allow unsharing of
+signals and signal handlers. Signals are complex to begin with and
+to unshare signals and/or signal handlers of a currently running
+process is even more complex. If in the future there is a specific
+need to allow unsharing of signals and/or signal handlers, it can
+be incrementally added to unshare() without affecting legacy
+applications using unshare().
+
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