There is a power saving mechanism in rt5660. It will turn off some
unused power when MCLK is not present. We call that "MCLK detection"
and it should be enabled by default.
Signed-off-by: Bard Liao <bardliao@xxxxxxxxxxx>
---
sound/soc/codecs/rt5660.c | 4 ++++
sound/soc/codecs/rt5660.h | 3 +++
2 files changed, 7 insertions(+)
diff --git a/sound/soc/codecs/rt5660.c b/sound/soc/codecs/rt5660.c
index 9f0933c..76cf76a 100644
--- a/sound/soc/codecs/rt5660.c
+++ b/sound/soc/codecs/rt5660.c
@@ -1311,6 +1311,10 @@ static int rt5660_i2c_probe(struct i2c_client *i2c,
if (ret != 0)
dev_warn(&i2c->dev, "Failed to apply regmap patch: %d\n", ret);
+ regmap_update_bits(rt5660->regmap, RT5660_GEN_CTRL1,
+ RT5660_AUTO_DIS_AMP | RT5660_MCLK_DET | RT5660_POW_CLKDET,
+ RT5660_AUTO_DIS_AMP | RT5660_MCLK_DET | RT5660_POW_CLKDET);
+
if (rt5660->pdata.dmic1_data_pin) {
regmap_update_bits(rt5660->regmap, RT5660_GPIO_CTRL1,
RT5660_GP1_PIN_MASK, RT5660_GP1_PIN_DMIC1_SCL);
diff --git a/sound/soc/codecs/rt5660.h b/sound/soc/codecs/rt5660.h
index 6cdb926..bba18fb6 100644
--- a/sound/soc/codecs/rt5660.h
+++ b/sound/soc/codecs/rt5660.h
@@ -810,6 +810,9 @@
/* General Control 1 (0xfa) */
#define RT5660_PWR_VREF_HP (0x1 << 11)
#define RT5660_PWR_VREF_HP_SFT 11
+#define RT5660_AUTO_DIS_AMP (0x1 << 6)
+#define RT5660_MCLK_DET (0x1 << 5)
+#define RT5660_POW_CLKDET (0x1 << 1)
#define RT5660_DIG_GATE_CTRL (0x1)
#define RT5660_DIG_GATE_CTRL_SFT 0
--
1.8.1.1.439.g50a6b54
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
