ASoC: rt5670: Enable MCLK detection

There is a power saving mechanism in rt5670. 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>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5670.c

@@ -2889,6 +2889,9 @@ static int rt5670_i2c_probe(struct i2c_client *i2c,
 	if (ret != 0)
 		dev_warn(&i2c->dev, "Failed to apply regmap patch: %d\n", ret);
 
+	regmap_update_bits(rt5670->regmap, RT5670_DIG_MISC,
+				 RT5670_MCLK_DET, RT5670_MCLK_DET);
+
 	if (rt5670->pdata.in2_diff)
 		regmap_update_bits(rt5670->regmap, RT5670_IN2,
 					RT5670_IN_DF2, RT5670_IN_DF2);
@@ -2903,7 +2906,6 @@ static int rt5670_i2c_probe(struct i2c_client *i2c,
 				   RT5670_GP1_PIN_MASK, RT5670_GP1_PIN_IRQ);
 		regmap_update_bits(rt5670->regmap, RT5670_GPIO_CTRL2,
 				   RT5670_GP1_PF_MASK, RT5670_GP1_PF_OUT);
-		regmap_update_bits(rt5670->regmap, RT5670_DIG_MISC, 0x8, 0x8);
 	}
 
 	if (rt5670->pdata.jd_mode) {

sound/soc/codecs/rt5670.h

@@ -1914,6 +1914,7 @@ enum {
 #define RT5670_IF1_ADC1_IN2_SFT			11
 #define RT5670_IF1_ADC2_IN1_SEL			(0x1 << 10)
 #define RT5670_IF1_ADC2_IN1_SFT			10
+#define RT5670_MCLK_DET				(0x1 << 3)
 
 /* General Control2 (0xfb) */
 #define RT5670_RXDC_SRC_MASK			(0x1 << 7)