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doc: media: Document VP9 reference_mode miss-placement

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The reference_mode derived syntax is part of the compressed headers and
should have been moved into the corresponding control structure. Document
this mistake. The value can be set to 0 if the driver does not require
compressed headers information.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: fix small typo in comment]
This commit is contained in:
Nicolas Dufresne 2022-02-21 14:37:27 -05:00 committed by Hans Verkuil
parent 9c634d6d13
commit 88c63ac741
1 changed files with 6 additions and 1 deletions
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7
Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
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@ -1692,7 +1692,12 @@ See section '7.3.1 Tx mode semantics' of the :ref:`vp9` specification for more d
* - __u8
- ``reference_mode``
- Specifies the type of inter prediction to be used. See
:ref:`Reference Mode<vp9_reference_mode>` for more details.
:ref:`Reference Mode<vp9_reference_mode>` for more details. Note that
this is derived as part of the compressed header parsing process and
for this reason should have been part of
:c:type: `v4l2_ctrl_vp9_compressed_hdr` optional control. It is safe to
set this value to zero if the driver does not require compressed
headers.
* - __u8
- ``reserved[7]``
- Applications and drivers must set this to zero.