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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2013-01-21 06:51:41 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-02-06 09:33:58 -0200 |
| commit | 05c79d0d1d0d44c2195d63d1e7c62e358eadeadf (patch) | |
| tree | 80bcfd35aec18bb5c7bbb610219f33bc1e3982c9 /drivers/media/usb | |
| parent | f23999eccb5f1b6ec858279670307b5b1abe887a (diff) | |
| download | linux-05c79d0d1d0d44c2195d63d1e7c62e358eadeadf.tar.gz | |
[media] uvcvideo: Implement videobuf2 .wait_prepare and .wait_finish operations
Those optional operations are used to release and reacquire the queue
lock when videobuf2 needs to perform operations that sleep for a long
time, such as waiting for a buffer to be complete. Implement them to
avoid blocking qbuf or streamoff calls when a dqbuf is in progress.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_queue.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c index 778addc5caff..6c233a54ce40 100644 --- a/drivers/media/usb/uvc/uvc_queue.c +++ b/drivers/media/usb/uvc/uvc_queue.c @@ -115,11 +115,27 @@ static int uvc_buffer_finish(struct vb2_buffer *vb) return 0; } +static void uvc_wait_prepare(struct vb2_queue *vq) +{ + struct uvc_video_queue *queue = vb2_get_drv_priv(vq); + + mutex_unlock(&queue->mutex); +} + +static void uvc_wait_finish(struct vb2_queue *vq) +{ + struct uvc_video_queue *queue = vb2_get_drv_priv(vq); + + mutex_lock(&queue->mutex); +} + static struct vb2_ops uvc_queue_qops = { .queue_setup = uvc_queue_setup, .buf_prepare = uvc_buffer_prepare, .buf_queue = uvc_buffer_queue, .buf_finish = uvc_buffer_finish, + .wait_prepare = uvc_wait_prepare, + .wait_finish = uvc_wait_finish, }; int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, |