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linux-sg2042
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[media] media: usb: uvc: use vb2_ops_wait_prepare/finish helper 

This patch drops driver specific wait_prepare() and wait_finish()
callbacks from vb2_ops and instead uses the the helpers
vb2_ops_wait_prepare/finish() provided by the vb2 core, the lock member
of the queue needs to be initalized to a mutex so that vb2 helpers
vb2_ops_wait_prepare/finish() can make use of it.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Lad, Prabhakar 2014-11-26 20:25:44 -03:00 committed by Mauro Carvalho Chehab
parent 9587a3fc43
commit 5fb3f55504
1 changed files with 3 additions and 16 deletions
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19
drivers/media/usb/uvc/uvc_queue.c
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@ -143,20 +143,6 @@ static void uvc_buffer_finish(struct vb2_buffer *vb)
uvc_video_clock_update(stream, &vb->v4l2_buf, buf);
}
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 int uvc_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
@ -195,8 +181,8 @@ static struct vb2_ops uvc_queue_qops = {
.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,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.start_streaming = uvc_start_streaming,
.stop_streaming = uvc_stop_streaming,
};
@ -214,6 +200,7 @@ int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
queue->queue.mem_ops = &vb2_vmalloc_memops;
queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
| V4L2_BUF_FLAG_TSTAMP_SRC_SOE;
queue->queue.lock = &queue->mutex;
ret = vb2_queue_init(&queue->queue);
if (ret)
return ret;