V4L/DVB (3275): Allow SAA7134 to fall back to AM sound when there is NICAM-L

This patch allows to select AM sound even if NICAM is detected.
Proposed by Alain Frappin

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

2 files changed, 15 insertions, 0 deletions

diff --git a/drivers/media/video/saa7134/saa7134-tvaudio.c b/drivers/media/video/saa7134/saa7134-tvaudio.c
index afa4dcb3f96d..3043233a8b6e 100644
--- a/drivers/media/video/saa7134/saa7134-tvaudio.c
+++ b/drivers/media/video/saa7134/saa7134-tvaudio.c
@@ -140,6 +140,12 @@ static struct saa7134_tvaudio tvaudio[] = {
                 .carr2         = 5850,
                 .mode          = TVAUDIO_NICAM_AM,
         },{
+                .name          = "SECAM-L MONO",
+                .std           = V4L2_STD_SECAM,
+                .carr1         = 6500,
+                .carr2         = -1,
+                .mode          = TVAUDIO_AM_MONO,
+        },{
                 .name          = "SECAM-D/K",
                 .std           = V4L2_STD_SECAM,
                 .carr1         = 6500,
@@ -334,6 +340,12 @@ static void tvaudio_setmode(struct saa7134_dev *dev,
                 saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa1);
                 saa_writeb(SAA7134_NICAM_CONFIG,              0x00);
                 break;
+        case TVAUDIO_AM_MONO:
+                saa_writeb(SAA7134_DEMODULATOR,               0x12);
+                saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x00);
+                saa_writeb(SAA7134_FM_DEEMPHASIS,             0x44);
+                saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa0);
+                break;
         case TVAUDIO_FM_SAT_STEREO:
                 /* not implemented (yet) */
                 break;
@@ -414,6 +426,7 @@ static int tvaudio_getstereo(struct saa7134_dev *dev, struct saa7134_tvaudio *au
 
         switch (audio->mode) {
         case TVAUDIO_FM_MONO:
+        case TVAUDIO_AM_MONO:
                 return V4L2_TUNER_SUB_MONO;
         case TVAUDIO_FM_K_STEREO:
         case TVAUDIO_FM_BG_STEREO:
@@ -480,6 +493,7 @@ static int tvaudio_setstereo(struct saa7134_dev *dev, struct saa7134_tvaudio *au
 
         switch (audio->mode) {
         case TVAUDIO_FM_MONO:
+        case TVAUDIO_AM_MONO:
                 /* nothing to do ... */
                 break;
         case TVAUDIO_FM_K_STEREO:
diff --git a/drivers/media/video/saa7134/saa7134.h b/drivers/media/video/saa7134/saa7134.h
index 3b8f466c7e17..b638df941ff9 100644
--- a/drivers/media/video/saa7134/saa7134.h
+++ b/drivers/media/video/saa7134/saa7134.h
@@ -60,6 +60,7 @@ enum saa7134_tvaudio_mode {
         TVAUDIO_FM_K_STEREO   = 4,
         TVAUDIO_NICAM_AM      = 5,
         TVAUDIO_NICAM_FM      = 6,
+        TVAUDIO_AM_MONO       = 7
 };
 
 enum saa7134_audio_in {