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| author | Ezequiel Garcia <ezequiel@collabora.com> | 2018-05-10 20:17:20 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-05-25 15:17:19 -0400 |
| commit | 24dd8d996f3b1d5adf86a3ea1b60e735853a6bbe (patch) | |
| tree | dc3ef9340ab33c62a6368d333a59c30d5f4ad214 /drivers/media/usb/usbtv | |
| parent | 8ed8bba70b4355b1ba029b151ade84475dd12991 (diff) | |
| download | linux-24dd8d996f3b1d5adf86a3ea1b60e735853a6bbe.tar.bz2 | |
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/usbtv')
| -rw-r--r-- | drivers/media/usb/usbtv/usbtv-video.c | 2 |
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) |