Both the DAC and ADC have digital gain controls available for their mixers, which go from -31 to 0db by step of 1db.

Signed-off-by: Christophe Branchereau cbranchereau@gmail.com --- sound/soc/codecs/jz4760.c | 9 +++++++++ 1 file changed, 9 insertions(+)

diff --git a/sound/soc/codecs/jz4760.c b/sound/soc/codecs/jz4760.c index d96a4f6c9183..9df58e23d360 100644 --- a/sound/soc/codecs/jz4760.c +++ b/sound/soc/codecs/jz4760.c @@ -287,6 +287,7 @@ static const DECLARE_TLV_DB_MINMAX_MUTE(dac_tlv, -3100, 100); static const DECLARE_TLV_DB_SCALE(adc_tlv, 0, 100, 0); static const DECLARE_TLV_DB_MINMAX(out_tlv, -2500, 100); static const DECLARE_TLV_DB_SCALE(linein_tlv, -2500, 100, 0); +static const DECLARE_TLV_DB_MINMAX(mixer_tlv, -3100, 0);

/* Unconditional controls. */ static const struct snd_kcontrol_new jz4760_codec_snd_controls[] = { @@ -299,6 +300,14 @@ static const struct snd_kcontrol_new jz4760_codec_snd_controls[] = { JZ4760_CODEC_REG_GCR4, JZ4760_CODEC_REG_GCR3, REG_GCR_GAIN_OFFSET, REG_GCR_GAIN_MAX, 1, linein_tlv),

+ SOC_SINGLE_TLV("Mixer Capture Volume", + JZ4760_CODEC_REG_MIX1, + REG_GCR_GAIN_OFFSET, REG_GCR_GAIN_MAX, 1, mixer_tlv), + + SOC_SINGLE_TLV("Mixer Playback Volume", + JZ4760_CODEC_REG_MIX2, + REG_GCR_GAIN_OFFSET, REG_GCR_GAIN_MAX, 1, mixer_tlv), + SOC_SINGLE("High-Pass Filter Capture Switch", JZ4760_CODEC_REG_CR4, REG_CR4_ADC_HPF_OFFSET, 1, 0),