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V4L/DVB: videobuf: make poll() report proper flags for output video devices 

According to the V4L2 specification, poll() should set POLLOUT | POLLWRNORM
flags for output devices after the frame has been displayed.

Signed-off-by: Pawel Osciak <p.osciak@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Pawel Osciak 2010-03-29 05:16:31 -03:00 committed by Mauro Carvalho Chehab
parent fc7f8fd42c
commit 9b55843413
1 changed files with 12 additions and 2 deletions
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14
drivers/media/video/videobuf-core.c
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@ -1120,8 +1120,18 @@ unsigned int videobuf_poll_stream(struct file *file,
if (0 == rc) {
poll_wait(file, &buf->done, wait);
if (buf->state == VIDEOBUF_DONE ||
buf->state == VIDEOBUF_ERROR)
rc = POLLIN|POLLRDNORM;
buf->state == VIDEOBUF_ERROR) {
switch (q->type) {
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
case V4L2_BUF_TYPE_VBI_OUTPUT:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
rc = POLLOUT | POLLWRNORM;
break;
default:
rc = POLLIN | POLLRDNORM;
break;
}
}
}
mutex_unlock(&q->vb_lock);
return rc;