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[media] media: fsl_viu: fix bug in streamon routine 

Currently video capturing using streaming I/O method
doesn't work if capturing to overlay buffer took place
before.

When enabling the stream we have to check the overlay
enable driver flag and reset it so that the interrupt
handler won't execute the overlay interrupt path after
enabling DMA in streamon routine. Otherwise the capture
interrupt won't be handled correctly causing non working
VIDIOC_DQBUF ioctl.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Anatolij Gustschin 2011-04-12 08:15:58 -03:00 committed by Mauro Carvalho Chehab
parent 791ae69910
commit f3b1af1964
1 changed files with 4 additions and 0 deletions
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4
drivers/media/video/fsl-viu.c
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@ -926,12 +926,16 @@ static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
struct viu_fh *fh = priv;
struct viu_dev *dev = fh->dev;
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (fh->type != i)
return -EINVAL;
if (dev->ovenable)
dev->ovenable = 0;
viu_start_dma(fh->dev);
return videobuf_streamon(&fh->vb_vidq);