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Diffstat (limited to 'Documentation/userspace-api/media/v4l/vidioc-querycap.rst')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/vidioc-querycap.rst | 11 |
1 files changed, 11 insertions, 0 deletions
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. |