kernel/linux.git/include/media/v4l2-dev.h, branch v6.19.11

media: v4l2-dev: Make macros to obtain containers const-aware

2025-11-03T14:58:41+00:00

Retain the constness of the object in media_entity_to_video_device() and to_video_device(), by switching to container_of_const(). Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil

media: Drop V4L2_FL_USES_V4L2_FH checks

2025-08-13T06:33:46+00:00

Now that all drivers use v4l2_fh, we can drop the V4L2_FL_USES_V4L2_FH checks through the V4L2 core. To ensure that all new drivers use v4l2_fh, keep setting the V4L2_FL_USES_V4L2_FH flag in v4l2_fh_init(), and verify it is set after the .open() file operation returns. Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: v4l: Make media_entity_to_video_device() NULL-safe

2025-07-10T09:32:23+00:00

Make media_entity_to_video_device(NULL) return NULL, instead of an invalid pointer value. Signed-off-by: Sakari Ailus Reviewed-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: v4l2-core: add v4l2_debugfs_root()

2024-10-12T08:44:05+00:00

This new function returns the dentry of the top-level debugfs "v4l2" directory. If it does not exist yet, then it is created first. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: v4l2-dev.h: increase struct video_device name size

2023-09-27T08:47:22+00:00

Increase the size of the name field to prevent a lot of string truncate compiler warnings. Signed-off-by: Hans Verkuil

media: mc: convert pipeline funcs to take media_pad

2022-09-24T07:22:30+00:00

Now that the pipeline is stored into pads instead of entities, we can change the relevant functions to take pads instead of entities. Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab

media: mc: entity: add alloc variant of pipeline_start

2022-09-24T07:15:52+00:00

Add new variant of media_pipeline_start(), media_pipeline_alloc_start(). media_pipeline_alloc_start() can be used by drivers that do not need to extend the media_pipeline. The function will either use the pipeline already associated with the entity, if such exists, or allocate a new pipeline. When media_pipeline_stop() is called and the pipeline's use count drops to zero, the pipeline is automatically freed. Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab

media: v4l2-dev: Add videodev wrappers for media pipelines

2022-09-24T07:13:23+00:00

With the upcoming stream related improvements to the pipelines, the pipelines are moved from media entities to media pads. As the drivers currently use the pipelines with the entity based model, moving the pipelines to pads will cause changes to the drivers. However, most of the uses of media pipelines are related to a video device (a DMA engine) with a single pad, and thus there's never a need to support multiple pads in these use cases. We can avoid pushing the complexities of the pad based model to the drivers by adding video device wrappers for the pipeline related functions. This patch adds a number of wrappers to media_pipeline functions, all of which take a video_device as a parameter (instead of a media_entity), and verify that there's just one pad. Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab

media: v4l2-dev.h: move open brace after struct video_device

2021-10-05T07:37:21+00:00

The open brace should be after a struct of define, that's good for searching. Signed-off-by: Yajun Deng Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: fix kernel-doc markups

2020-11-16T09:31:16+00:00

Some identifiers have different names between their prototypes and the kernel-doc markup. Seome seems to be due to cut-and-paste related issues. Others need to be fixed, as kernel-doc markups should use this format: identifier - description Acked-by: Sakari Ailus # IPU3 and V4L2 Signed-off-by: Mauro Carvalho Chehab