Hans Verkuil ea115d54bc V4L/DVB (6087): ivtv: prevent changing VBI format while capture is in progress
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>
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