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| author | Erling Ljunggren <hljunggr@cisco.com> | 2022-11-11 14:29:03 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2024-09-05 20:11:28 +0200 |
| commit | d2f2ce0069d447ca9de80edc38ca8484d1c8a94d (patch) | |
| tree | 718db4d581bb63b0d4255070da10e2daefa6da8c /Documentation/userspace-api/media/v4l | |
| parent | c9edd2e4fed5f8a6f14808a1fd17b7d56b6c00f3 (diff) | |
media: docs: Add V4L2_CAP_EDID
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>
Diffstat (limited to 'Documentation/userspace-api/media/v4l')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/biblio.rst | 11 | ||||
| -rw-r--r-- | Documentation/userspace-api/media/v4l/vidioc-querycap.rst | 11 |
2 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/biblio.rst b/Documentation/userspace-api/media/v4l/biblio.rst index 72aef1759b60..35674eeae20d 100644 --- a/Documentation/userspace-api/media/v4l/biblio.rst +++ b/Documentation/userspace-api/media/v4l/biblio.rst @@ -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 diff --git a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst index 6c57b8428356..3d11d86d9cbf 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst @@ -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. |