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-rw-r--r--Documentation/userspace-api/media/v4l/app-pri.rst30
-rw-r--r--Documentation/userspace-api/media/v4l/async.rst9
-rw-r--r--Documentation/userspace-api/media/v4l/audio.rst97
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-rw-r--r--Documentation/userspace-api/media/v4l/biblio.rst409
-rw-r--r--Documentation/userspace-api/media/v4l/buffer.rst807
-rw-r--r--Documentation/userspace-api/media/v4l/capture-example.rst13
-rw-r--r--Documentation/userspace-api/media/v4l/capture.c.rst664
-rw-r--r--Documentation/userspace-api/media/v4l/colorspaces-defs.rst175
-rw-r--r--Documentation/userspace-api/media/v4l/colorspaces-details.rst805
-rw-r--r--Documentation/userspace-api/media/v4l/colorspaces.rst163
-rw-r--r--Documentation/userspace-api/media/v4l/common-defs.rst13
-rw-r--r--Documentation/userspace-api/media/v4l/common.rst58
-rw-r--r--Documentation/userspace-api/media/v4l/compat.rst18
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-rw-r--r--Documentation/userspace-api/media/v4l/control.rst505
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-rw-r--r--Documentation/userspace-api/media/v4l/depth-formats.rst17
-rw-r--r--Documentation/userspace-api/media/v4l/dev-capture.rst101
-rw-r--r--Documentation/userspace-api/media/v4l/dev-decoder.rst1103
-rw-r--r--Documentation/userspace-api/media/v4l/dev-encoder.rst729
-rw-r--r--Documentation/userspace-api/media/v4l/dev-event.rst47
-rw-r--r--Documentation/userspace-api/media/v4l/dev-mem2mem.rst43
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-rw-r--r--Documentation/userspace-api/media/v4l/dev-osd.rst150
-rw-r--r--Documentation/userspace-api/media/v4l/dev-output.rst98
-rw-r--r--Documentation/userspace-api/media/v4l/dev-overlay.rst321
-rw-r--r--Documentation/userspace-api/media/v4l/dev-radio.rst52
-rw-r--r--Documentation/userspace-api/media/v4l/dev-raw-vbi.rst292
-rw-r--r--Documentation/userspace-api/media/v4l/dev-rds.rst178
-rw-r--r--Documentation/userspace-api/media/v4l/dev-sdr.rst107
-rw-r--r--Documentation/userspace-api/media/v4l/dev-sliced-vbi.rst645
-rw-r--r--Documentation/userspace-api/media/v4l/dev-stateless-decoder.rst424
-rw-r--r--Documentation/userspace-api/media/v4l/dev-subdev.rst501
-rw-r--r--Documentation/userspace-api/media/v4l/dev-touch.rst56
-rw-r--r--Documentation/userspace-api/media/v4l/devices.rst26
-rw-r--r--Documentation/userspace-api/media/v4l/diff-v4l.rst659
-rw-r--r--Documentation/userspace-api/media/v4l/dmabuf.rst162
-rw-r--r--Documentation/userspace-api/media/v4l/dv-timings.rst38
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst659
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst4387
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-detect.rst64
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-dv.rst159
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-flash.rst185
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-fm-rx.rst88
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst181
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst56
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-image-source.rst60
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-jpeg.rst106
-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-rf-tuner.rst89
-rw-r--r--Documentation/userspace-api/media/v4l/extended-controls.rst173
-rw-r--r--Documentation/userspace-api/media/v4l/field-order.rst165
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-rw-r--r--Documentation/userspace-api/media/v4l/format.rst91
-rw-r--r--Documentation/userspace-api/media/v4l/fourcc.rst32
-rw-r--r--Documentation/userspace-api/media/v4l/func-close.rst45
-rw-r--r--Documentation/userspace-api/media/v4l/func-ioctl.rst58
-rw-r--r--Documentation/userspace-api/media/v4l/func-mmap.rst137
-rw-r--r--Documentation/userspace-api/media/v4l/func-munmap.rst54
-rw-r--r--Documentation/userspace-api/media/v4l/func-open.rst79
-rw-r--r--Documentation/userspace-api/media/v4l/func-poll.rst113
-rw-r--r--Documentation/userspace-api/media/v4l/func-read.rst130
-rw-r--r--Documentation/userspace-api/media/v4l/func-select.rst116
-rw-r--r--Documentation/userspace-api/media/v4l/func-write.rst81
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-rw-r--r--Documentation/userspace-api/media/v4l/libv4l-introduction.rst180
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-rw-r--r--Documentation/userspace-api/media/v4l/open.rst238
-rw-r--r--Documentation/userspace-api/media/v4l/pipeline.dot14
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-bayer.rst32
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-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-indexed.rst47
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-intro.rst51
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-inzi.rst82
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-m420.rst126
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-meta-d4xx.rst213
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-meta-intel-ipu3.rst81
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst49
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-meta-uvc.rst51
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-meta-vivid.rst36
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-meta-vsp1-hgo.rst168
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-meta-vsp1-hgt.rst129
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-nv12.rst129
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-nv12m.rst144
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-nv12mt.rst60
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-nv16.rst153
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-nv16m.rst157
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-nv24.rst95
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-packed-hsv.rst157
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst373
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-reserved.rst258
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-rgb.rst1297
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-sdr-cs08.rst30
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-sdr-cs14le.rst34
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-sdr-cu08.rst30
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-sdr-cu16le.rst34
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-sdr-pcu16be.rst55
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-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-sdr-ru12le.rst32
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-srggb10-ipu3.rst335
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-srggb10.rst76
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-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-srggb12p.rst87
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-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-srggb8.rst54
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-tch-td08.rst52
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-tch-td16.rst67
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-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-tch-tu16.rst66
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-uv8.rst47
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-uyvy.rst110
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-v4l2-mplane.rst123
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst240
-rw-r--r--Documentation/userspace-api/media/v4l/pixfmt-vyuy.rst108
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-rw-r--r--Documentation/userspace-api/media/v4l/planar-apis.rst61
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-rw-r--r--Documentation/userspace-api/media/v4l/tch-formats.rst18
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-rw-r--r--Documentation/userspace-api/media/v4l/v4l2-selection-flags.rst44
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-rw-r--r--Documentation/userspace-api/media/v4l/video.rst68
-rw-r--r--Documentation/userspace-api/media/v4l/videodev.rst9
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-rw-r--r--Documentation/userspace-api/media/v4l/vidioc-dbg-g-chip-info.rst155
-rw-r--r--Documentation/userspace-api/media/v4l/vidioc-dbg-g-register.rst160
-rw-r--r--Documentation/userspace-api/media/v4l/vidioc-decoder-cmd.rst216
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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
index 000000000..c500a28f0
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/bayer.svg
@@ -0,0 +1,30 @@
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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 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later -->
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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
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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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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 -->
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+ </text>
+ </g>
+</svg>
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
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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`
+ * -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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`
+ * .. _MEDIA-BUS-FMT-YUYV8-1_5X8:
+
+ - MEDIA_BUS_FMT_YUYV8_1_5X8
+ - 0x2004
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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`
+ * -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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`
+ * .. _MEDIA-BUS-FMT-YVYU8-1_5X8:
+
+ - MEDIA_BUS_FMT_YVYU8_1_5X8
+ - 0x2005
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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`
+ * -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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-VYUY8-2X8:
+
+ - MEDIA_BUS_FMT_VYUY8_2X8
+ - 0x2007
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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-YUYV8-2X8:
+
+ - MEDIA_BUS_FMT_YUYV8_2X8
+ - 0x2008
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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:`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:`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:`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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+ - y\ :sub:`4`
+ - y\ :sub:`3`
+ - y\ :sub:`2`
+ - y\ :sub:`1`
+ - y\ :sub:`0`
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+ - v\ :sub:`6`
+ - v\ :sub:`5`
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+ - v\ :sub:`1`
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+ - y\ :sub:`5`
+ - y\ :sub:`4`
+ - y\ :sub:`3`
+ - y\ :sub:`2`
+ - y\ :sub:`1`
+ - 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-Y10-1X10:
+
+ - MEDIA_BUS_FMT_Y10_1X10
+ - 0x200a
+ -
+ -
+ -
+ -
+ -
+ -
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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-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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+ -
+ -
+ - 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:`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:`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:`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:`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:`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`
+ * -
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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`
+ * .. _MEDIA-BUS-FMT-YUYV10-2X10:
+
+ - MEDIA_BUS_FMT_YUYV10_2X10
+ - 0x200b
+ -
+ -
+ -
+ -
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+ - 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`
+ * -
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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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+ - 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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+ -
+ -
+ - 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:`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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+ -
+ -
+ -
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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
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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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+ -
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+ -
+ -
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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`
+ * -
+ -
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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-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`
+ * -
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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`
+ * -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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`
+ * -
+ -
+ -
+ -
+ -
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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`
+ * -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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`
+ * -
+ -
+ -
+ -
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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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+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ - 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.
diff --git a/Documentation/userspace-api/media/v4l/subdev-image-processing-crop.svg b/Documentation/userspace-api/media/v4l/subdev-image-processing-crop.svg
new file mode 100644
index 000000000..d92311281
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/subdev-image-processing-crop.svg
@@ -0,0 +1,303 @@
+<?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"
+ width="42.799767cm"
+ height="9.9348345cm"
+ viewBox="-194 128 840.06984 194.72276"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.91 r13725"
+ sodipodi:docname="subdev-image-processing-crop.svg">
+ <metadata
+ id="metadata100">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <defs
+ id="defs98" />
+ <sodipodi:namedview
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1"
+ objecttolerance="10"
+ gridtolerance="10"
+ guidetolerance="10"
+ inkscape:pageopacity="0"
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+ inkscape:window-width="1920"
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+ showgrid="false"
+ fit-margin-top="0"
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+ fit-margin-right="0"
+ fit-margin-bottom="0"
+ inkscape:zoom="0.3649199"
+ inkscape:cx="764.40286"
+ inkscape:cy="176.91347"
+ inkscape:window-x="1920"
+ inkscape:window-y="30"
+ inkscape:window-maximized="1"
+ inkscape:current-layer="svg2" />
+ <rect
+ style="fill:none;fill-opacity:0;stroke:#000000;stroke-width:2"
+ x="-9.6002426"
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+ width="469.77399"
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+ id="rect4" />
+ <g
+ id="g6"
+ transform="translate(-1.6002426,-1.1395339)">
+ <rect
+ style="fill:#ffffff"
+ x="4.5"
+ y="189"
+ width="159"
+ height="104"
+ id="rect8" />
+ <rect
+ style="fill:none;fill-opacity:0;stroke:#a52a2a;stroke-width:2"
+ x="4.5"
+ y="189"
+ width="159"
+ height="104"
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+ </g>
+ <g
+ id="g12"
+ transform="translate(-1.6002426,-1.1395339)">
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+ style="fill:#ffffff"
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+ width="94"
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+ </g>
+ <text
+ style="font-style:normal;font-weight:normal;font-size:12.80000019px;font-family:sanserif;text-anchor:start;fill:#0000ff"
+ x="72.899757"
+ y="226.61047"
+ id="text18">
+ <tspan
+ x="72.899757"
+ y="226.61047"
+ 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"
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+ <tspan
+ x="6.938117"
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+ <tspan
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+ id="tspan34">bus format</tspan>
+ </text>
+ <text
+ style="font-style:normal;font-weight:normal;font-size:12.80000019px;font-family:sanserif;text-anchor:start;fill:#8b6914"
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+ id="tspan38">source media</tspan>
+ <tspan
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+ id="tspan40">bus format</tspan>
+ </text>
+ <g
+ id="g42"
+ transform="translate(-1.6002426,-1.1395339)">
+ <rect
+ style="fill:#ffffff"
+ x="350.48801"
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+ style="fill:none;fill-opacity:0;stroke:#8b6914;stroke-width:2"
+ x="350.48801"
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+ height="75.166"
+ id="rect46" />
+ </g>
+ <line
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+ r="8.5" />
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+ cx="473.10001"
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+ r="8.5" />
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+ style="fill:none;fill-opacity:0;stroke:#000000;stroke-width:2"
+ cx="473.10001"
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+ </g>
+ <g
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+ transform="translate(-1.6002426,-1.1395339)">
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+ style="fill:none;fill-opacity:0;stroke:#000000;stroke-width:2"
+ points="635.435,215.012 645.434,220.014 635.433,225.012 637.934,220.012 "
+ id="polygon70" />
+ </g>
+ <text
+ style="font-style:normal;font-weight:normal;font-size:12.80000019px;font-family:sanserif;text-anchor:start;fill:#000000"
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+ <tspan
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+ id="tspan74">pad 1 (source)</tspan>
+ </text>
+ <g
+ id="g76"
+ transform="translate(-1.6002426,-1.1395339)">
+ <circle
+ style="fill:#ffffff"
+ cx="-20.398199"
+ cy="241.51199"
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+ r="8.5" />
+ <circle
+ style="fill:none;fill-opacity:0;stroke:#000000;stroke-width:2"
+ cx="-20.398199"
+ cy="241.51199"
+ id="ellipse80"
+ r="8.5" />
+ <circle
+ style="fill:none;fill-opacity:0;stroke:#000000;stroke-width:2"
+ cx="-20.398199"
+ cy="241.51199"
+ id="ellipse82"
+ r="8.5" />
+ </g>
+ <g
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+ transform="translate(-1.6002426,-1.1395339)">
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+ points="-41.1431,236.534 -31.1343,241.516 -41.1254,246.534 -38.6343,241.529 "
+ id="polygon90" />
+ </g>
+ <text
+ style="font-style:normal;font-weight:normal;font-size:12.80000019px;font-family:sanserif;text-anchor:start;fill:#000000"
+ x="-149.45824"
+ y="228.66048"
+ id="text92">
+ <tspan
+ x="-149.45824"
+ y="228.66048"
+ id="tspan94">pad 0 (sink)</tspan>
+ </text>
+</svg>
diff --git a/Documentation/userspace-api/media/v4l/subdev-image-processing-full.svg b/Documentation/userspace-api/media/v4l/subdev-image-processing-full.svg
new file mode 100644
index 000000000..864a594ff
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/subdev-image-processing-full.svg
@@ -0,0 +1,743 @@
+<?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#"
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+ 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"
+ width="58.825298cm"
+ height="17.279287cm"
+ viewBox="-186 71 1174.5119 332.1463"
+ id="svg2"
+ version="1.1"
+ inkscape:version="0.91 r13725"
+ sodipodi:docname="subdev-image-processing-full.svg">
+ <metadata
+ id="metadata260">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title />
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <defs
+ id="defs258" />
+ <sodipodi:namedview
+ pagecolor="#ffffff"
+ bordercolor="#666666"
+ borderopacity="1"
+ objecttolerance="10"
+ gridtolerance="10"
+ guidetolerance="10"
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+ showgrid="false"
+ fit-margin-top="0"
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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;
+ }
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new file mode 100644
index 000000000..b01086d46
--- /dev/null
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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