diff options
author | Sakari Ailus | 2020-11-30 14:46:06 +0100 |
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committer | Mauro Carvalho Chehab | 2021-01-12 15:54:53 +0100 |
commit | 25c8d9a7689ed2ee092a618fff718d62eed07489 (patch) | |
tree | 36a107b6346342bc072e0c0824b62e5a34663a31 /Documentation | |
parent | 352cf679c73d30c2262aa337d7e2ce93c66dd2b6 (diff) |
media: Documentation: v4l: Document that link_validate op is valid for sink only
The link_validate pad op will only be called on sink pads. Document this.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/driver-api/media/v4l2-subdev.rst | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/Documentation/driver-api/media/v4l2-subdev.rst b/Documentation/driver-api/media/v4l2-subdev.rst index d4cba0d6c4ca..6d5c799c49fe 100644 --- a/Documentation/driver-api/media/v4l2-subdev.rst +++ b/Documentation/driver-api/media/v4l2-subdev.rst @@ -122,11 +122,12 @@ Don't forget to cleanup the media entity before the sub-device is destroyed: media_entity_cleanup(&sd->entity); -In that case, the subdev driver may set the link_validate field to provide -its own link validation function. The link validation function is called for -every link in the pipeline where both of the ends of the links are V4L2 -sub-devices. The driver is still responsible for validating the correctness -of the format configuration between sub-devices and video nodes. +If a sub-device driver implements sink pads, the subdev driver may set the +link_validate field in :c:type:`v4l2_subdev_pad_ops`to provide its own link +validation function. For every link in the pipeline, the link_validate pad +operation of the sink end of the link is called. In both cases the driver is +still responsible for validating the correctness of the format configuration +between sub-devices and video nodes. If link_validate op is not set, the default function :c:func:`v4l2_subdev_link_validate_default` is used instead. This function |