diff options
| author | Zidan Wang <zidan.wang@freescale.com> | 2016-01-08 16:57:01 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-01-08 13:07:25 +0000 |
| commit | defbf708baf2a4cc4421699d02b57d7c3bb728b0 (patch) | |
| tree | 9362a6758cc56947ac50bcb6ea86b8065463600d /sound/soc | |
| parent | 4a5893cf67062be4f70196c3fe45cfda950ea308 (diff) | |
ASoC: wm8960: add DAC mono mix kcontrol
In normal operation, the left and right channel digital audio data is
converted to analogue in two separate DACs. There is a mono-mix mode
where the two audio channels are mixed together digitally and then
converted to analogue using only one DAC, while the other DAC is
switched off. The mono-mix signal can be selected to appear on both
analogue output channels. The mono mix is automatically attenuated by
6dB to prevent clipping.
Signed-off-by: Zidan Wang <zidan.wang@freescale.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/codecs/wm8960.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c index 328bde09d5bf..9e90b8e2b86e 100644 --- a/sound/soc/codecs/wm8960.c +++ b/sound/soc/codecs/wm8960.c @@ -153,6 +153,7 @@ static const char *wm8960_adc_data_output_sel[] = { "Left Data = Right ADC; Right Data = Right ADC", "Left Data = Right ADC; Right Data = Left ADC", }; +static const char *wm8960_dmonomix[] = {"Stereo", "Mono"}; static const struct soc_enum wm8960_enum[] = { SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity), @@ -162,6 +163,7 @@ static const struct soc_enum wm8960_enum[] = { SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc), SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode), SOC_ENUM_SINGLE(WM8960_ADDCTL1, 2, 4, wm8960_adc_data_output_sel), + SOC_ENUM_SINGLE(WM8960_ADDCTL1, 4, 2, wm8960_dmonomix), }; static const int deemph_settings[] = { 0, 32000, 44100, 48000 }; @@ -304,6 +306,7 @@ SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume", WM8960_ROUTMIX, 4, 7, 1, bypass_tlv), SOC_ENUM("ADC Data Output Select", wm8960_enum[6]), +SOC_ENUM("DAC Mono Mix", wm8960_enum[7]), }; static const struct snd_kcontrol_new wm8960_lin_boost[] = { |