diff options
Diffstat (limited to 'Documentation/admin-guide/media')
| -rw-r--r-- | Documentation/admin-guide/media/index.rst | 10 | ||||
| -rw-r--r-- | Documentation/admin-guide/media/starfive_camss.rst | 72 | ||||
| -rw-r--r-- | Documentation/admin-guide/media/starfive_camss_graph.dot | 12 | ||||
| -rw-r--r-- | Documentation/admin-guide/media/v4l-drivers.rst | 1 | ||||
| -rw-r--r-- | Documentation/admin-guide/media/visl.rst | 2 |
5 files changed, 88 insertions, 9 deletions
diff --git a/Documentation/admin-guide/media/index.rst b/Documentation/admin-guide/media/index.rst index 43f4a292b2..be7e0e4482 100644 --- a/Documentation/admin-guide/media/index.rst +++ b/Documentation/admin-guide/media/index.rst @@ -20,16 +20,8 @@ Documentation/driver-api/media/index.rst - for driver development information and Kernel APIs used by media devices; -The media subsystem -=================== - -.. only:: html - - .. class:: toc-title - - Table of Contents - .. toctree:: + :caption: Table of Contents :maxdepth: 2 :numbered: diff --git a/Documentation/admin-guide/media/starfive_camss.rst b/Documentation/admin-guide/media/starfive_camss.rst new file mode 100644 index 0000000000..ca42e9447c --- /dev/null +++ b/Documentation/admin-guide/media/starfive_camss.rst @@ -0,0 +1,72 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. include:: <isonum.txt> + +================================ +Starfive Camera Subsystem driver +================================ + +Introduction +------------ + +This file documents the driver for the Starfive Camera Subsystem found on +Starfive JH7110 SoC. The driver is located under drivers/staging/media/starfive/ +camss. + +The driver implements V4L2, Media controller and v4l2_subdev interfaces. Camera +sensor using V4L2 subdev interface in the kernel is supported. + +The driver has been successfully used on the Gstreamer 1.18.5 with v4l2src +plugin. + + +Starfive Camera Subsystem hardware +---------------------------------- + +The Starfive Camera Subsystem hardware consists of:: + + |\ +---------------+ +-----------+ + +----------+ | \ | | | | + | | | | | | | | + | MIPI |----->| |----->| ISP |----->| | + | | | | | | | | + +----------+ | | | | | Memory | + |MUX| +---------------+ | Interface | + +----------+ | | | | + | | | |---------------------------->| | + | Parallel |----->| | | | + | | | | | | + +----------+ | / | | + |/ +-----------+ + +- MIPI: The MIPI interface, receiving data from a MIPI CSI-2 camera sensor. + +- Parallel: The parallel interface, receiving data from a parallel sensor. + +- ISP: The ISP, processing raw Bayer data from an image sensor and producing + YUV frames. + + +Topology +-------- + +The media controller pipeline graph is as follows: + +.. _starfive_camss_graph: + +.. kernel-figure:: starfive_camss_graph.dot + :alt: starfive_camss_graph.dot + :align: center + +The driver has 2 video devices: + +- capture_raw: The capture device, capturing image data directly from a sensor. +- capture_yuv: The capture device, capturing YUV frame data processed by the + ISP module + +The driver has 3 subdevices: + +- stf_isp: is responsible for all the isp operations, outputs YUV frames. +- cdns_csi2rx: a CSI-2 bridge supporting up to 4 CSI lanes in input, and 4 + different pixel streams in output. +- imx219: an image sensor, image data is sent through MIPI CSI-2. diff --git a/Documentation/admin-guide/media/starfive_camss_graph.dot b/Documentation/admin-guide/media/starfive_camss_graph.dot new file mode 100644 index 0000000000..8eff1f161a --- /dev/null +++ b/Documentation/admin-guide/media/starfive_camss_graph.dot @@ -0,0 +1,12 @@ +digraph board { + rankdir=TB + n00000001 [label="{{<port0> 0} | stf_isp\n/dev/v4l-subdev0 | {<port1> 1}}", shape=Mrecord, style=filled, fillcolor=green] + n00000001:port1 -> n00000008 [style=dashed] + n00000004 [label="capture_raw\n/dev/video0", shape=box, style=filled, fillcolor=yellow] + n00000008 [label="capture_yuv\n/dev/video1", shape=box, style=filled, fillcolor=yellow] + n0000000e [label="{{<port0> 0} | cdns_csi2rx.19800000.csi-bridge\n | {<port1> 1 | <port2> 2 | <port3> 3 | <port4> 4}}", shape=Mrecord, style=filled, fillcolor=green] + n0000000e:port1 -> n00000001:port0 [style=dashed] + n0000000e:port1 -> n00000004 [style=dashed] + n00000018 [label="{{} | imx219 6-0010\n/dev/v4l-subdev1 | {<port0> 0}}", shape=Mrecord, style=filled, fillcolor=green] + n00000018:port0 -> n0000000e:port0 [style=bold] +} diff --git a/Documentation/admin-guide/media/v4l-drivers.rst b/Documentation/admin-guide/media/v4l-drivers.rst index 61283d67ce..f4bb2605f0 100644 --- a/Documentation/admin-guide/media/v4l-drivers.rst +++ b/Documentation/admin-guide/media/v4l-drivers.rst @@ -28,6 +28,7 @@ Video4Linux (V4L) driver-specific documentation si470x si4713 si476x + starfive_camss vimc visl vivid diff --git a/Documentation/admin-guide/media/visl.rst b/Documentation/admin-guide/media/visl.rst index 4328c6c72d..db1ef29438 100644 --- a/Documentation/admin-guide/media/visl.rst +++ b/Documentation/admin-guide/media/visl.rst @@ -71,6 +71,7 @@ The following codecs are supported: - VP9 - H.264 - HEVC +- AV1 visl trace events ----------------- @@ -79,6 +80,7 @@ The trace events are defined on a per-codec basis, e.g.: .. code-block:: bash $ ls /sys/kernel/tracing/events/ | grep visl + visl_av1_controls visl_fwht_controls visl_h264_controls visl_hevc_controls |