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@realtek.com --- 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