diff --git a/sound/soc/codecs/rk817_codec.c b/sound/soc/codecs/rk817_codec.c
index e3cbe7eeed24..b5501048f595 100644
--- a/sound/soc/codecs/rk817_codec.c
+++ b/sound/soc/codecs/rk817_codec.c
@@ -329,7 +329,7 @@ static struct rk817_reg_val_typ capture_power_up_list[] = {
 	{RK817_CODEC_DI2S_TXCR3_TXCMD, 0x88},
 	{RK817_CODEC_DDAC_POPD_DACST, 0x02},
 	/* 0x29: -18db to 27db */
-	{RK817_CODEC_DMIC_PGA_GAIN, 0xaa},
+	{RK817_CODEC_DMIC_PGA_GAIN, 0x99},
 };
 
 #define RK817_CODEC_CAPTURE_POWER_UP_LIST_LEN \
@@ -649,7 +649,7 @@ static int rk817_capture_path_put(struct snd_kcontrol *kcontrol,
 
 		if (rk817->adc_for_loopback) {
 			/* don't need to gain when adc use for loopback */
-			snd_soc_write(codec, RK817_CODEC_AMIC_CFG0, 0x00);
+			snd_soc_update_bits(codec, RK817_CODEC_AMIC_CFG0, 0xf, 0x0);
 			snd_soc_write(codec, RK817_CODEC_DMIC_PGA_GAIN, 0x66);
 			snd_soc_write(codec, RK817_CODEC_DADC_VOLL, 0x00);
 			snd_soc_write(codec, RK817_CODEC_DADC_VOLR, 0x00);
@@ -669,7 +669,7 @@ static int rk817_capture_path_put(struct snd_kcontrol *kcontrol,
 
 		if (rk817->adc_for_loopback) {
 			/* don't need to gain when adc use for loopback */
-			snd_soc_write(codec, RK817_CODEC_AMIC_CFG0, 0x00);
+			snd_soc_update_bits(codec, RK817_CODEC_AMIC_CFG0, 0xf, 0x0);
 			snd_soc_write(codec, RK817_CODEC_DMIC_PGA_GAIN, 0x66);
 			snd_soc_write(codec, RK817_CODEC_DADC_VOLL, 0x00);
 			snd_soc_write(codec, RK817_CODEC_DADC_VOLR, 0x00);