V4L/DVB (3584): Implement V4L2_TUNER_MODE_LANG1_LANG2 audio mode

Add a new audio mode V4L2_TUNER_MODE_LANG1_LANG2 (used by VIDIOC_G/S_TUNER).
This mode allows the user to select both languages of a bilingual transmission,
one language on the left, one on the right audio channel. If there is no
bilingual transmission, or it is not supported, then this mode should act like
V4L2_TUNER_MODE_STEREO.
This mode is introduced for PVR-like drivers where it is useful to be able to
record both languages of a bilingual broadcast.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 724cfbf54b8a..2275bfec5b68 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -883,6 +883,7 @@ struct v4l2_modulator
 #define V4L2_TUNER_MODE_LANG2           0x0002
 #define V4L2_TUNER_MODE_SAP             0x0002
 #define V4L2_TUNER_MODE_LANG1           0x0003
+#define V4L2_TUNER_MODE_LANG1_LANG2     0x0004
 
 struct v4l2_frequency
 {