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@xxxxxxxx>
---
sound/soc/codecs/tas571x.c | 19 +++++++++++++++++++
sound/soc/codecs/tas571x.h | 5 +++++
2 files changed, 24 insertions(+)
diff --git a/sound/soc/codecs/tas571x.c b/sound/soc/codecs/tas571x.c
index 39307ad..bca0e84 100644
--- a/sound/soc/codecs/tas571x.c
+++ b/sound/soc/codecs/tas571x.c
@@ -57,6 +57,11 @@ static int tas571x_register_size(struct tas571x_private *priv, unsigned int reg)
case TAS571X_CH1_VOL_REG:
case TAS571X_CH2_VOL_REG:
return priv->chip->vol_reg_size;
+ 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;
}
@@ -293,6 +298,16 @@ static const struct snd_kcontrol_new tas5717_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 reg_default tas5717_reg_defaults[] = {
@@ -303,6 +318,10 @@ 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 = {
diff --git a/sound/soc/codecs/tas571x.h b/sound/soc/codecs/tas571x.h
index 0aee471..b4175d6 100644
--- a/sound/soc/codecs/tas571x.h
+++ b/sound/soc/codecs/tas571x.h
@@ -30,4 +30,9 @@
#define TAS571X_OSC_TRIM_REG 0x1b
+#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 */
--
2.5.0
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