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[media] V4L: soc-camera: start stream after queueing the buffers

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Some camera systems have strong requirement for capturing
an exact number of frames after starting the stream and do
not tolerate losing captured frames. By starting the stream
after the videobuf has queued the buffers, we ensure that
no frame will be lost.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Anatolij Gustschin 2011-01-31 09:19:32 -03:00 committed by Mauro Carvalho Chehab
parent ed5b65dc36
commit 7fdbd85bce
1 changed files with 2 additions and 2 deletions
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4
drivers/media/video/soc_camera.c
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@ -655,10 +655,10 @@ static int soc_camera_streamon(struct file *file, void *priv,
if (icd->streamer != file)
return -EBUSY;
v4l2_subdev_call(sd, video, s_stream, 1);
/* This calls buf_queue from host driver's videobuf_queue_ops */
ret = videobuf_streamon(&icd->vb_vidq);
if (!ret)
v4l2_subdev_call(sd, video, s_stream, 1);
return ret;
}