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media: docs: Add V4L2_CAP_EDID

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Add documentation for the new edid capability.

Signed-off-by: Erling Ljunggren <hljunggr@cisco.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Sebastian Fricke <sebastian.fricke@collabora.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Erling Ljunggren 2022-11-11 14:29:03 +01:00 committed by Mauro Carvalho Chehab
parent c9edd2e4fe
commit d2f2ce0069
3 changed files with 23 additions and 0 deletions
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11
Documentation/userspace-api/media/v4l/biblio.rst
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@ -334,6 +334,17 @@ VESA DMT
:author: Video Electronics Standards Association (http://www.vesa.org)
.. _vesaeddc:
E-DDC
=====
:title: VESA Enhanced Display Data Channel (E-DDC) Standard
:subtitle: Version 1.3
:author: Video Electronics Standards Association (http://www.vesa.org)
.. _vesaedid:
EDID

11
Documentation/userspace-api/media/v4l/vidioc-querycap.rst
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@ -244,6 +244,17 @@ specification the ioctl returns an ``EINVAL`` error code.
- 0x01000000
- The device supports the :c:func:`read()` and/or
:c:func:`write()` I/O methods.
* - ``V4L2_CAP_EDID``
- 0x02000000
- The device stores the EDID for a video input, or retrieves the EDID for a video
output. It is a standalone EDID device, so no video streaming etc. will take place.
For a video input this is typically an eeprom that supports the
:ref:`VESA Enhanced Display Data Channel Standard <vesaeddc>`. It can be something
else as well, for example a micro controller.
For a video output this is typically read from an external device such as an
HDMI splitter accessed by a serial port.
* - ``V4L2_CAP_STREAMING``
- 0x04000000
- The device supports the :ref:`streaming <mmap>` I/O method.

1
Documentation/userspace-api/media/videodev2.h.rst.exceptions
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@ -197,6 +197,7 @@ replace define V4L2_CAP_META_OUTPUT device-capabilities
replace define V4L2_CAP_DEVICE_CAPS device-capabilities
replace define V4L2_CAP_TOUCH device-capabilities
replace define V4L2_CAP_IO_MC device-capabilities
replace define V4L2_CAP_EDID device-capabilities
# V4L2 pix flags
replace define V4L2_PIX_FMT_PRIV_MAGIC :c:type:`v4l2_pix_format`