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>

drivers/media/dvb/ttpci/av7110_v4l.c

@@ -369,6 +369,11 @@ static int av7110_ioctl(struct saa7146_fh *fh, unsigned int cmd, void *arg)
 			fm_matrix = 0x3001; // stereo
 			src = 0x0020;
 			break;
+		case V4L2_TUNER_MODE_LANG1_LANG2:
+			dprintk(2, "VIDIOC_S_TUNER: V4L2_TUNER_MODE_LANG1_LANG2\n");
+			fm_matrix = 0x3000; // bilingual
+			src = 0x0020;
+			break;
 		case V4L2_TUNER_MODE_LANG1:
 			dprintk(2, "VIDIOC_S_TUNER: V4L2_TUNER_MODE_LANG1\n");
 			fm_matrix = 0x3000; // mono

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;

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;

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;

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;

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;

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;
 

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:

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
 {