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V4L/DVB (8090): ivtv: yuv decoder lock fix (2) 

The IVTV_IOC_DMA_FRAME ioctl fails to correctly 'start' the decoder. Although
yuv output will be correct, some functions which should be disabled while the
decoder is in use remain enabled. This can result in hardware registers being
corrupted, causing problems with the mpeg decoder. This patch ensures the
decoder 'start' sequence is called, disabling these functions until the
device is closed.

Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Ian Armstrong 2008-06-21 11:09:46 -03:00 committed by Mauro Carvalho Chehab
parent 03c2808503
commit 42b03fe16f
1 changed files with 1 additions and 1 deletions
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2
drivers/media/video/ivtv/ivtv-ioctl.c
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@ -1539,7 +1539,7 @@ static int ivtv_decoder_ioctls(struct file *filp, unsigned int cmd, void *arg)
return -EINVAL;
if (itv->output_mode == OUT_UDMA_YUV && args->y_source == NULL)
return 0;
if (ivtv_claim_stream(id, id->type)) {
if (ivtv_start_decoding(id, id->type)) {
return -EBUSY;
}
if (ivtv_set_output_mode(itv, OUT_UDMA_YUV) != OUT_UDMA_YUV) {