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V4L/DVB (6087): ivtv: prevent changing VBI format while capture is in progress

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Changing the VBI format requires a CX2341X_ENC_INITIALIZE_INPUT firmware
call. This can only be done if no capture is in progress. So return
-EBUSY if the encoder is busy.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil 2007-08-20 16:26:40 -03:00 • committed by Mauro Carvalho Chehab
parent ad8ff0f10b
commit ea115d54bc
1 changed files with 2 additions and 4 deletions
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6
drivers/media/video/ivtv/ivtv-ioctl.c
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@ -584,9 +584,7 @@ static int ivtv_try_or_set_fmt(struct ivtv *itv, int streamtype,
/* set raw VBI format */ /* set raw VBI format */
if (fmt->type == V4L2_BUF_TYPE_VBI_CAPTURE) { if (fmt->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
if (set_fmt && streamtype == IVTV_ENC_STREAM_TYPE_VBI && if (set_fmt && atomic_read(&itv->capturing) > 0) {
itv->vbi.sliced_in->service_set &&
atomic_read(&itv->capturing) > 0) {
return -EBUSY; return -EBUSY;
} }
if (set_fmt) { if (set_fmt) {
@ -624,7 +622,7 @@ static int ivtv_try_or_set_fmt(struct ivtv *itv, int streamtype,
return 0; return 0;
if (set == 0) if (set == 0)
return -EINVAL; return -EINVAL;
if (atomic_read(&itv->capturing) > 0 && itv->vbi.sliced_in->service_set == 0) { if (atomic_read(&itv->capturing) > 0) {
return -EBUSY; return -EBUSY;
} }
itv->video_dec_func(itv, VIDIOC_S_FMT, fmt); itv->video_dec_func(itv, VIDIOC_S_FMT, fmt);