diff --git a/sound/soc/mediatek/mt8188/mt8188-afe-pcm.c b/sound/soc/mediatek/mt8188/mt8188-afe-pcm.c
index 73e5c63aeec8..d36520c6272d 100644
--- a/sound/soc/mediatek/mt8188/mt8188-afe-pcm.c
+++ b/sound/soc/mediatek/mt8188/mt8188-afe-pcm.c
@@ -2855,10 +2855,6 @@ static bool mt8188_is_volatile_reg(struct device *dev, unsigned int reg)
 	case AFE_DMIC3_SRC_DEBUG_MON0:
 	case AFE_DMIC3_UL_SRC_MON0:
 	case AFE_DMIC3_UL_SRC_MON1:
-	case DMIC_GAIN1_CUR:
-	case DMIC_GAIN2_CUR:
-	case DMIC_GAIN3_CUR:
-	case DMIC_GAIN4_CUR:
 	case ETDM_IN1_MONITOR:
 	case ETDM_IN2_MONITOR:
 	case ETDM_OUT1_MONITOR: