diff options
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-video.c')
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-video.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/media/video/cx23885/cx23885-video.c b/drivers/media/video/cx23885/cx23885-video.c index a182e829c8d0..44a63c4de122 100644 --- a/drivers/media/video/cx23885/cx23885-video.c +++ b/drivers/media/video/cx23885/cx23885-video.c @@ -1100,6 +1100,14 @@ static int vidioc_streamon(struct file *file, void *priv, if (unlikely(!res_get(dev, fh, get_resource(fh)))) return -EBUSY; + + /* Don't start VBI streaming unless vida streaming + * has already started. + */ + if ((fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) && + ((cx_read(VID_A_DMA_CTL) & 0x11) == 0)) + return -EINVAL; + return videobuf_streamon(get_queue(fh)); } |