[PATCH 4/5] ASoC: codecs: ES8326: Minimize the pop noise on headphone

[Zhu Ning <zhuning0077@xxxxxxxxx>]

    We modify the register settings to minimize headphone pop noise
    during ES8326 power-up and music start/stop.

Signed-off-by: Zhu Ning <zhuning0077@xxxxxxxxx>
---
 sound/soc/codecs/es8326.c | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/sound/soc/codecs/es8326.c b/sound/soc/codecs/es8326.c
index c7f89c990178..fd3e73c4b7e9 100755
--- a/sound/soc/codecs/es8326.c
+++ b/sound/soc/codecs/es8326.c
@@ -553,7 +553,8 @@ static int es8326_mute(struct snd_soc_dai *dai, int mute, int direction)
 		regmap_write(es8326->regmap, ES8326_HP_CAL, ES8326_HP_OFF);
 		regmap_update_bits(es8326->regmap, ES8326_DAC_MUTE,
 				ES8326_MUTE_MASK, ES8326_MUTE);
-		regmap_write(es8326->regmap, ES8326_HP_DRIVER, 0xf0);
+		regmap_update_bits(es8326->regmap, ES8326_HP_DRIVER_REF,
+				0x30, 0x00);
 	} else {
 		if (!es8326->calibrated) {
 			regmap_write(es8326->regmap, ES8326_HP_CAL, ES8326_HP_FORCE_CAL);
@@ -566,8 +567,13 @@ static int es8326_mute(struct snd_soc_dai *dai, int mute, int direction)
 			regmap_write(es8326->regmap, ES8326_HPR_OFFSET_INI, offset_r);
 			es8326->calibrated = true;
 		}
+		regmap_update_bits(es8326->regmap, ES8326_DAC_DSM, 0x01, 0x01);
+		usleep_range(1000, 5000);
+		regmap_update_bits(es8326->regmap, ES8326_DAC_DSM, 0x01, 0x00);
+		usleep_range(1000, 5000);
+		regmap_update_bits(es8326->regmap, ES8326_HP_DRIVER_REF, 0x30, 0x20);
+		regmap_update_bits(es8326->regmap, ES8326_HP_DRIVER_REF, 0x30, 0x30);
 		regmap_write(es8326->regmap, ES8326_HP_DRIVER, 0xa1);
-		regmap_write(es8326->regmap, ES8326_HP_VOL, 0x91);
 		regmap_write(es8326->regmap, ES8326_HP_CAL, ES8326_HP_ON);
 		regmap_update_bits(es8326->regmap, ES8326_DAC_MUTE,
 				ES8326_MUTE_MASK, ~(ES8326_MUTE));
@@ -587,23 +593,20 @@ static int es8326_set_bias_level(struct snd_soc_component *codec,
 		if (ret)
 			return ret;
 
-		regmap_update_bits(es8326->regmap, ES8326_DAC_DSM, 0x01, 0x00);
+		regmap_update_bits(es8326->regmap, ES8326_RESET, 0x02, 0x02);
+		usleep_range(5000, 10000);
 		regmap_write(es8326->regmap, ES8326_INTOUT_IO, es8326->interrupt_clk);
 		regmap_write(es8326->regmap, ES8326_SDINOUT1_IO,
 			    (ES8326_IO_DMIC_CLK << ES8326_SDINOUT1_SHIFT));
-		regmap_write(es8326->regmap, ES8326_VMIDSEL, 0x0E);
 		regmap_write(es8326->regmap, ES8326_PGA_PDN, 0x40);
 		regmap_write(es8326->regmap, ES8326_ANA_PDN, 0x00);
 		regmap_update_bits(es8326->regmap,  ES8326_CLK_CTL, 0x20, 0x20);
-
-		regmap_update_bits(es8326->regmap, ES8326_RESET,
-				ES8326_CSM_ON, ES8326_CSM_ON);
+		regmap_update_bits(es8326->regmap, ES8326_RESET, 0x02, 0x00);
 		break;
 	case SND_SOC_BIAS_PREPARE:
 		break;
 	case SND_SOC_BIAS_STANDBY:
 		regmap_write(es8326->regmap, ES8326_ANA_PDN, 0x3b);
-		regmap_write(es8326->regmap, ES8326_VMIDSEL, 0x00);
 		regmap_update_bits(es8326->regmap, ES8326_CLK_CTL, 0x20, 0x00);
 		regmap_write(es8326->regmap, ES8326_SDINOUT1_IO, ES8326_IO_INPUT);
 		break;
@@ -807,6 +810,7 @@ static void es8326_jack_detect_handler(struct work_struct *work)
 			 * Don't report jack status.
 			 */
 			regmap_update_bits(es8326->regmap, ES8326_HPDET_TYPE, 0x03, 0x01);
+			es8326_enable_micbias(es8326->component);
 			usleep_range(50000, 70000);
 			regmap_update_bits(es8326->regmap, ES8326_HPDET_TYPE, 0x03, 0x00);
 			regmap_write(es8326->regmap, ES8326_SYS_BIAS, 0x1f);
@@ -850,13 +854,10 @@ static void es8326_jack_detect_handler(struct work_struct *work)
 static irqreturn_t es8326_irq(int irq, void *dev_id)
 {
 	struct es8326_priv *es8326 = dev_id;
-	struct snd_soc_component *comp = es8326->component;
 
 	if (!es8326->jack)
 		goto out;
 
-	es8326_enable_micbias(comp);
-
 	if (es8326->jack->status & SND_JACK_HEADSET)
 		queue_delayed_work(system_wq, &es8326->jack_detect_work,
 				   msecs_to_jiffies(10));
@@ -973,6 +974,14 @@ static int es8326_resume(struct snd_soc_component *component)
 	regmap_write(es8326->regmap, ES8326_DAC_DSM, 0x08);
 	regmap_write(es8326->regmap, ES8326_DAC_VPPSCALE, 0x15);
 
+	regmap_write(es8326->regmap, ES8326_HPDET_TYPE, 0x80 |
+			((es8326->version == ES8326_VERSION_B) ?
+			(ES8326_HP_DET_SRC_PIN9 | es8326->jack_pol) :
+			(ES8326_HP_DET_SRC_PIN9 | es8326->jack_pol | 0x04)));
+	usleep_range(5000, 10000);
+	es8326_enable_micbias(es8326->component);
+	usleep_range(50000, 70000);
+	regmap_update_bits(es8326->regmap, ES8326_HPDET_TYPE, 0x03, 0x00);
 	regmap_write(es8326->regmap, ES8326_INT_SOURCE,
 		    (ES8326_INT_SRC_PIN9 | ES8326_INT_SRC_BUTTON));
 	regmap_write(es8326->regmap, ES8326_INTOUT_IO,
@@ -989,11 +998,6 @@ static int es8326_resume(struct snd_soc_component *component)
 	regmap_update_bits(es8326->regmap, ES8326_DAC_MUTE, ES8326_MUTE_MASK,
 			   ES8326_MUTE);
 
-	regmap_write(es8326->regmap, ES8326_HPDET_TYPE, 0x80 |
-			((es8326->version == ES8326_VERSION_B) ?
-			(ES8326_HP_DET_SRC_PIN9 | es8326->jack_pol) :
-			(ES8326_HP_DET_SRC_PIN9 | es8326->jack_pol | 0x04)));
-	regmap_write(es8326->regmap, ES8326_HP_VOL, 0x11);
 
 	es8326->jack_remove_retry = 0;
 	es8326->hp = 0;
-- 
2.17.1