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ASoC: tas571x: add input channel mixer for TAS5717/19

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Add channel 1 and 2 input mixer registers and the related ALSA mixer
controls for TAS5717/19 chips.

The mixer control coefficients on the chip are linear in the range
-3.99999 to +3.99999, encoded in 3.23 number format.
In this patch the mixer controls are limited to 128 values
from 0.0 to 1.0 in 1/64 steps.

Signed-off-by: Petr Kulhavy <brain@jikos.cz>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Petr Kulhavy 2016-06-01 09:30:00 +02:00 committed by Mark Brown
parent 4b9e385b9d
commit f7d3d2d8e8
2 changed files with 23 additions and 0 deletions
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18
sound/soc/codecs/tas571x.c
View File

@ -64,6 +64,10 @@ static int tas571x_register_size(struct tas571x_private *priv, unsigned int reg)
case TAS571X_INPUT_MUX_REG:
case TAS571X_CH4_SRC_SELECT_REG:
case TAS571X_PWM_MUX_REG:
case TAS5717_CH1_RIGHT_CH_MIX_REG:
case TAS5717_CH1_LEFT_CH_MIX_REG:
case TAS5717_CH2_LEFT_CH_MIX_REG:
case TAS5717_CH2_RIGHT_CH_MIX_REG:
return 4;
default:
return 1;
@ -397,6 +401,16 @@ static const struct snd_kcontrol_new tas5711_controls[] = {
TAS571X_SOFT_MUTE_REG,
TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,
1, 1),
SOC_DOUBLE_R_RANGE("CH1 Mixer Volume",
TAS5717_CH1_LEFT_CH_MIX_REG,
TAS5717_CH1_RIGHT_CH_MIX_REG,
16, 0, 0x80, 0),
SOC_DOUBLE_R_RANGE("CH2 Mixer Volume",
TAS5717_CH2_LEFT_CH_MIX_REG,
TAS5717_CH2_RIGHT_CH_MIX_REG,
16, 0, 0x80, 0),
};
static const struct regmap_range tas571x_readonly_regs_range[] = {
@ -520,6 +534,10 @@ static const struct reg_default tas5717_reg_defaults[] = {
{ 0x08, 0x00c0 },
{ 0x09, 0x00c0 },
{ 0x1b, 0x82 },
{ TAS5717_CH1_RIGHT_CH_MIX_REG, 0x0 },
{ TAS5717_CH1_LEFT_CH_MIX_REG, 0x800000},
{ TAS5717_CH2_LEFT_CH_MIX_REG, 0x0 },
{ TAS5717_CH2_RIGHT_CH_MIX_REG, 0x800000},
};
static const struct regmap_config tas5717_regmap_config = {

5
sound/soc/codecs/tas571x.h
View File

@ -87,4 +87,9 @@
#define TAS5717_CH3_BQ0_REG 0x5e
#define TAS5717_CH3_BQ1_REG 0x5f
#define TAS5717_CH1_RIGHT_CH_MIX_REG 0x72
#define TAS5717_CH1_LEFT_CH_MIX_REG 0x73
#define TAS5717_CH2_LEFT_CH_MIX_REG 0x76
#define TAS5717_CH2_RIGHT_CH_MIX_REG 0x77
#endif /* _TAS571X_H */