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, 3 insertions, 2 deletions

diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c
index 7aee37645d63..a65b3cc4bf03 100644
--- a/drivers/media/video/cx25840/cx25840-core.c
+++ b/drivers/media/video/cx25840/cx25840-core.c
@@ -810,13 +810,14 @@ static int cx25840_command(struct i2c_client *client, unsigned int cmd,
                            bilingual -> lang1 */
                         cx25840_and_or(client, 0x809, ~0xf, 0x00);
                         break;
+                case V4L2_TUNER_MODE_STEREO:
                 case V4L2_TUNER_MODE_LANG1:
                         /* mono      -> mono
                            stereo    -> stereo
                            bilingual -> lang1 */
                         cx25840_and_or(client, 0x809, ~0xf, 0x04);
                         break;
-                case V4L2_TUNER_MODE_STEREO:
+                case V4L2_TUNER_MODE_LANG1_LANG2:
                         /* mono      -> mono
                            stereo    -> stereo
                            bilingual -> lang1/lang2 */
@@ -824,7 +825,7 @@ static int cx25840_command(struct i2c_client *client, unsigned int cmd,
                         break;
                 case V4L2_TUNER_MODE_LANG2:
                         /* mono      -> mono
-                           stereo    ->stereo
+                           stereo    -> stereo
                            bilingual -> lang2 */
                         cx25840_and_or(client, 0x809, ~0xf, 0x01);
                         break;