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>

7 files changed, 23 insertions, 5 deletions

diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index 80e4a7406ac2..74def9c23952 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -1878,7 +1878,8 @@ static int bttv_common_ioctls(struct bttv *btv, unsigned int cmd, void *arg)
                         bttv_call_i2c_clients(btv, VIDIOCGAUDIO, &va);
                         if (t->audmode == V4L2_TUNER_MODE_MONO)
                                 va.mode = VIDEO_SOUND_MONO;
-                        else if (t->audmode == V4L2_TUNER_MODE_STEREO)
+                        else if (t->audmode == V4L2_TUNER_MODE_STEREO ||
+                                 t->audmode == V4L2_TUNER_MODE_LANG1_LANG2)
                                 va.mode = VIDEO_SOUND_STEREO;
                         else if (t->audmode == V4L2_TUNER_MODE_LANG1)
                                 va.mode = VIDEO_SOUND_LANG1;
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;
diff --git a/drivers/media/video/cx88/cx88-tvaudio.c b/drivers/media/video/cx88/cx88-tvaudio.c
index da8d97ce0c4b..641a0c5a6490 100644
--- a/drivers/media/video/cx88/cx88-tvaudio.c
+++ b/drivers/media/video/cx88/cx88-tvaudio.c
@@ -885,6 +885,7 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
                         set_audio_standard_BTSC(core, 1, EN_BTSC_FORCE_SAP);
                         break;
                 case V4L2_TUNER_MODE_STEREO:
+                case V4L2_TUNER_MODE_LANG1_LANG2:
                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_STEREO);
                         break;
                 }
@@ -905,6 +906,7 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
                                                          EN_NICAM_FORCE_MONO2);
                                 break;
                         case V4L2_TUNER_MODE_STEREO:
+                        case V4L2_TUNER_MODE_LANG1_LANG2:
                                 set_audio_standard_NICAM(core,
                                                          EN_NICAM_FORCE_STEREO);
                                 break;
@@ -926,6 +928,7 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
                                                               EN_A2_FORCE_MONO2);
                                         break;
                                 case V4L2_TUNER_MODE_STEREO:
+                                case V4L2_TUNER_MODE_LANG1_LANG2:
                                         set_audio_standard_A2(core,
                                                               EN_A2_FORCE_STEREO);
                                         break;
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;
diff --git a/drivers/media/video/mxb.c b/drivers/media/video/mxb.c
index 14ca251787d5..b0aea4002d11 100644
--- a/drivers/media/video/mxb.c
+++ b/drivers/media/video/mxb.c
@@ -790,6 +790,12 @@ static int mxb_ioctl(struct saa7146_fh *fh, unsigned int cmd, void *arg)
                                 DEB_D(("VIDIOC_S_TUNER: V4L2_TUNER_MODE_STEREO\n"));
                                 break;
                         }
+                        case V4L2_TUNER_MODE_LANG1_LANG2: {
+                                mxb->cur_mode = V4L2_TUNER_MODE_LANG1_LANG2;
+                                byte = TDA9840_SET_BOTH;
+                                DEB_D(("VIDIOC_S_TUNER: V4L2_TUNER_MODE_LANG1_LANG2\n"));
+                                break;
+                        }
                         case V4L2_TUNER_MODE_LANG1: {
                                 mxb->cur_mode = V4L2_TUNER_MODE_LANG1;
                                 byte = TDA9840_SET_LANG1;
diff --git a/drivers/media/video/saa7134/saa7134-tvaudio.c b/drivers/media/video/saa7134/saa7134-tvaudio.c
index 3043233a8b6e..0db53d192b2a 100644
--- a/drivers/media/video/saa7134/saa7134-tvaudio.c
+++ b/drivers/media/video/saa7134/saa7134-tvaudio.c
@@ -482,12 +482,14 @@ static int tvaudio_setstereo(struct saa7134_dev *dev, struct saa7134_tvaudio *au
                 [ V4L2_TUNER_MODE_STEREO ] = "stereo",
                 [ V4L2_TUNER_MODE_LANG1  ] = "lang1",
                 [ V4L2_TUNER_MODE_LANG2  ] = "lang2",
+                [ V4L2_TUNER_MODE_LANG1_LANG2  ] = "lang1+lang2",
         };
         static u32 fm[] = {
                 [ V4L2_TUNER_MODE_MONO   ] = 0x00,  /* ch1  */
                 [ V4L2_TUNER_MODE_STEREO ] = 0x80,  /* auto */
                 [ V4L2_TUNER_MODE_LANG1  ] = 0x00,  /* ch1  */
                 [ V4L2_TUNER_MODE_LANG2  ] = 0x01,  /* ch2  */
+                [ V4L2_TUNER_MODE_LANG1_LANG2 ] = 0x80,  /* auto */
         };
         u32 reg;
 
diff --git a/drivers/media/video/tvaudio.c b/drivers/media/video/tvaudio.c
index 4e6d030d83c0..356bff455ad1 100644
--- a/drivers/media/video/tvaudio.c
+++ b/drivers/media/video/tvaudio.c
@@ -1733,6 +1733,7 @@ static int chip_command(struct i2c_client *client,
                         mode = VIDEO_SOUND_MONO;
                         break;
                 case V4L2_TUNER_MODE_STEREO:
+                case V4L2_TUNER_MODE_LANG1_LANG2:
                         mode = VIDEO_SOUND_STEREO;
                         break;
                 case V4L2_TUNER_MODE_LANG1: