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| author | Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> | 2022-08-31 17:13:35 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-09-24 10:15:52 +0300 |
| commit | d9f4434513b499ddb8ba8617fba787b1ce98274e (patch) | |
| tree | 2511aac5989743e07f245a6f141240add21a0d52 /drivers/media/v4l2-core | |
| parent | 98d79dc34798cb5b3bdbc49cfc17ff63b3044b64 (diff) | |
| download | linux-d9f4434513b499ddb8ba8617fba787b1ce98274e.tar.xz | |
media: mc: entity: add alloc variant of pipeline_start
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 <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-dev.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index 7f933ff89fd4..945bb867a4c1 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -1143,6 +1143,17 @@ void __video_device_pipeline_stop(struct video_device *vdev) } EXPORT_SYMBOL_GPL(__video_device_pipeline_stop); +__must_check int video_device_pipeline_alloc_start(struct video_device *vdev) +{ + struct media_entity *entity = &vdev->entity; + + if (entity->num_pads != 1) + return -ENODEV; + + return media_pipeline_alloc_start(entity); +} +EXPORT_SYMBOL_GPL(video_device_pipeline_alloc_start); + struct media_pipeline *video_device_pipeline(struct video_device *vdev) { struct media_entity *entity = &vdev->entity; |