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, 6 insertions, 2 deletions

diff --git a/drivers/media/video/msp3400-kthreads.c b/drivers/media/video/msp3400-kthreads.c
index 1c794c3b9f21..c3984ea9ca07 100644
--- a/drivers/media/video/msp3400-kthreads.c
+++ b/drivers/media/video/msp3400-kthreads.c
@@ -223,9 +223,9 @@ void msp3400c_set_mode(struct i2c_client *client, int mode)
    nor do they support stereo BTSC. */
 static void msp3400c_set_audmode(struct i2c_client *client)
 {
-        static char *strmode[] = { "mono", "stereo", "lang2", "lang1" };
+        static char *strmode[] = { "mono", "stereo", "lang2", "lang1", "lang1+lang2" };
         struct msp_state *state = i2c_get_clientdata(client);
-        char *modestr = (state->audmode >= 0 && state->audmode < 4) ?
+        char *modestr = (state->audmode >= 0 && state->audmode < 5) ?
                 strmode[state->audmode] : "unknown";
         int src = 0;    /* channel source: FM/AM, nicam or SCART */
 
@@ -250,6 +250,7 @@ static void msp3400c_set_audmode(struct i2c_client *client)
                 case V4L2_TUNER_MODE_MONO:
                 case V4L2_TUNER_MODE_LANG1:
                 case V4L2_TUNER_MODE_LANG2:
+                case V4L2_TUNER_MODE_LANG1_LANG2:
                         msp_write_dsp(client, 0x000e, 0x3000);
                         break;
                 }
@@ -261,6 +262,7 @@ static void msp3400c_set_audmode(struct i2c_client *client)
                         msp3400c_set_carrier(client, MSP_CARRIER(6.5), MSP_CARRIER(6.5));
                         break;
                 case V4L2_TUNER_MODE_STEREO:
+                case V4L2_TUNER_MODE_LANG1_LANG2:
                         msp3400c_set_carrier(client, MSP_CARRIER(7.2), MSP_CARRIER(7.02));
                         break;
                 case V4L2_TUNER_MODE_LANG1:
@@ -296,6 +298,7 @@ static void msp3400c_set_audmode(struct i2c_client *client)
         /* switch audio */
         switch (state->audmode) {
         case V4L2_TUNER_MODE_STEREO:
+        case V4L2_TUNER_MODE_LANG1_LANG2:
                 src |= 0x0020;
                 break;
         case V4L2_TUNER_MODE_MONO:
@@ -835,6 +838,7 @@ static void msp34xxg_set_source(struct i2c_client *client, u16 reg, int in)
                 matrix = 0x10;
                 break;
         case V4L2_TUNER_MODE_STEREO:
+        case V4L2_TUNER_MODE_LANG1_LANG2:
         default:
                 source = 1; /* stereo or A|B */
                 matrix = 0x20;