Shuah Khan 77fa4e0729
[media] media: Change v4l-core to check if source is free ...
Change s_input, s_fmt, s_tuner, s_frequency, querystd, s_hw_freq_seek,
and vb2_core_streamon interfaces that alter the tuner configuration to
check if it is free, by calling v4l_enable_media_source().
If source isn't free, return -EBUSY.
v4l_disable_media_source() is called from v4l2_fh_exit() to release
tuner (source).
vb2_core_streamon() uses v4l_vb2q_enable_media_source().
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com >
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com >
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77fa4e0729