| Message ID | 20180511001720.6007-1-ezequiel@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c index 3668a04359e8..0c0d0ef71573 100644 --- a/drivers/media/usb/usbtv/usbtv-video.c +++ b/drivers/media/usb/usbtv/usbtv-video.c @@ -698,6 +698,8 @@ static const struct vb2_ops usbtv_vb2_ops = { .buf_queue = usbtv_buf_queue, .start_streaming = usbtv_start_streaming, .stop_streaming = usbtv_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, }; static int usbtv_s_ctrl(struct v4l2_ctrl *ctrl)
This driver is currently specifying a vb2_queue lock, which means it straightforward to implement wait_prepare and wait_finish. Having these callbacks releases the queue lock while blocking, which improves latency by allowing for example streamoff or qbuf operations while waiting in dqbuf. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> --- Compile tested only. drivers/media/usb/usbtv/usbtv-video.c | 2 ++ 1 file changed, 2 insertions(+)