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| author | Sakari Ailus <sakari.ailus@iki.fi> | 2012-01-23 07:03:00 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-05-14 13:44:52 +0200 |
| commit | 48398f932b4ddcc8fa9a890595645cc14f6889a8 (patch) | |
| tree | 23c3904ed3efe98665ebcb33abfb9c7625cf0960 /Documentation/video4linux/v4l2-framework.txt | |
| parent | [media] media: Add link_validate() op to check links to the sink pad (diff) | |
| download | linux-48398f932b4ddcc8fa9a890595645cc14f6889a8.tar.xz linux-48398f932b4ddcc8fa9a890595645cc14f6889a8.zip | |
[media] v4l: Improve sub-device documentation for pad ops
Document that format related configuration is done through pad ops in case
the driver does use the media framework.
Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/video4linux/v4l2-framework.txt')
| -rw-r--r-- | Documentation/video4linux/v4l2-framework.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt index 369d4bc87828..493ffd1b1cf5 100644 --- a/Documentation/video4linux/v4l2-framework.txt +++ b/Documentation/video4linux/v4l2-framework.txt @@ -266,11 +266,16 @@ struct v4l2_subdev_video_ops { ... }; +struct v4l2_subdev_pad_ops { + ... +}; + struct v4l2_subdev_ops { const struct v4l2_subdev_core_ops *core; const struct v4l2_subdev_tuner_ops *tuner; const struct v4l2_subdev_audio_ops *audio; const struct v4l2_subdev_video_ops *video; + const struct v4l2_subdev_pad_ops *video; }; The core ops are common to all subdevs, the other categories are implemented @@ -307,6 +312,10 @@ Don't forget to cleanup the media entity before the sub-device is destroyed: media_entity_cleanup(&sd->entity); +If the subdev driver intends to process video and integrate with the media +framework, it must implement format related functionality using +v4l2_subdev_pad_ops instead of v4l2_subdev_video_ops. + A device (bridge) driver needs to register the v4l2_subdev with the v4l2_device: |