From: Fabio Estevam fabio.estevam@freescale.com

By default the headphone left/right registers have a volume of zero.

Instead of having to change the volume via alsamixer in order to be able to hear something, let's set an initial value of -20dB, so that audio playback can be heard by default.

Tested on a mx6qsabresd board.

Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- Mark,

I posted it as RFC as I don't know if this is a valid approach. Suggestions are welcome.

Thanks

sound/soc/codecs/wm8962.c | 6 ++++++ sound/soc/codecs/wm8962.h | 2 ++ 2 files changed, 8 insertions(+)

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c index e2de9ec..6a5066c 100644 --- a/sound/soc/codecs/wm8962.c +++ b/sound/soc/codecs/wm8962.c @@ -3448,6 +3448,12 @@ static int wm8962_probe(struct snd_soc_codec *codec) WM8962_MICBIAS_LVL, pdata->mic_cfg);

+ /* set an initial volume for playback of -20 dB */ + snd_soc_update_bits(codec, WM8962_HPOUTL_VOLUME, + WM8962_HPOUTL_VOL_MASK, WM8962_HPOUTx_MINUS_20_DB); + snd_soc_update_bits(codec, WM8962_HPOUTR_VOLUME, + WM8962_HPOUTR_VOL_MASK, WM8962_HPOUTx_MINUS_20_DB); + /* Latch volume update bits */ snd_soc_update_bits(codec, WM8962_LEFT_INPUT_VOLUME, WM8962_IN_VU, WM8962_IN_VU); diff --git a/sound/soc/codecs/wm8962.h b/sound/soc/codecs/wm8962.h index a1a5d52..5dbe972 100644 --- a/sound/soc/codecs/wm8962.h +++ b/sound/soc/codecs/wm8962.h @@ -27,6 +27,8 @@ #define WM8962_FLL_OSC 3 #define WM8962_FLL_INT 4

+#define WM8962_HPOUTx_MINUS_20_DB 0x65 + /* * Register values. */