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authorEzequiel Garcia2018-05-10 20:17:20 -0400
committerMauro Carvalho Chehab2018-05-25 15:17:19 -0400
commit24dd8d996f3b1d5adf86a3ea1b60e735853a6bbe (patch)
treedc3ef9340ab33c62a6368d333a59c30d5f4ad214 /drivers/media/usb
parent8ed8bba70b4355b1ba029b151ade84475dd12991 (diff)
media: usbtv: Implement wait_prepare and wait_finish
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> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/usb')
-rw-r--r--drivers/media/usb/usbtv/usbtv-video.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c
index c2f8e50228ac..ce79df643c7e 100644
--- a/drivers/media/usb/usbtv/usbtv-video.c
+++ b/drivers/media/usb/usbtv/usbtv-video.c
@@ -781,6 +781,8 @@ 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)