diff options
Diffstat (limited to 'include/media/videobuf2-v4l2.h')
| -rw-r--r-- | include/media/videobuf2-v4l2.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h index b7b5a9cb5a28..c203047eb834 100644 --- a/include/media/videobuf2-v4l2.h +++ b/include/media/videobuf2-v4l2.h @@ -23,6 +23,8 @@ #error VB2_MAX_PLANES != VIDEO_MAX_PLANES #endif +struct video_device; + /** * struct vb2_v4l2_buffer - video buffer information for v4l2. * @@ -320,6 +322,21 @@ unsigned long vb2_fop_get_unmapped_area(struct file *file, unsigned long addr, #endif /** + * vb2_video_unregister_device - unregister the video device and release queue + * + * @vdev: pointer to &struct video_device + * + * If the driver uses vb2_fop_release()/_vb2_fop_release(), then it should use + * vb2_video_unregister_device() instead of video_unregister_device(). + * + * This function will call video_unregister_device() and then release the + * vb2_queue if streaming is in progress. This will stop streaming and + * this will simplify the unbind sequence since after this call all subdevs + * will have stopped streaming as well. + */ +void vb2_video_unregister_device(struct video_device *vdev); + +/** * vb2_ops_wait_prepare - helper function to lock a struct &vb2_queue * * @vq: pointer to &struct vb2_queue |