V4L/DVB (9269): cx88: add I2S-ADC tvaudio method

This adds I2S-ADC tvaudio mode as a formal method of audio
delivery.

This fixes one bug and adds fm audio via I2S-ADC on cards
that support it.

The bug occured before when I2S-ADC mode was initiated on
composite/s-video open but was then reset within 500ms
by the audio thread which used any previous audio tuning
details.

Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/media/video/cx88/cx88-tvaudio.c b/drivers/media/video/cx88/cx88-tvaudio.c
index 3a1977f41e27..7dd506b987fe 100644
--- a/drivers/media/video/cx88/cx88-tvaudio.c
+++ b/drivers/media/video/cx88/cx88-tvaudio.c
@@ -767,6 +767,14 @@ void cx88_set_tvaudio(struct cx88_core *core)
         case WW_FM:
                 set_audio_standard_FM(core, radio_deemphasis);
                 break;
+        case WW_I2SADC:
+                set_audio_start(core, 0x01);
+                /* Slave/Philips/Autobaud */
+                cx_write(AUD_I2SINPUTCNTL, 0);
+                /* Switch to "I2S ADC mode" */
+                cx_write(AUD_I2SCNTL, 0x1);
+                set_audio_finish(core, EN_I2SIN_ENABLE);
+                break;
         case WW_NONE:
         default:
                 printk("%s/0: unknown tv audio mode [%d]\n",
@@ -895,6 +903,9 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
                         break;
                 }
                 break;
+        case WW_I2SADC:
+                /* DO NOTHING */
+                break;
         }
 
         if (UNSET != ctl) {