diff --git a/ac108.c b/ac108.c
index 6b2ae52..21f55b8 100644
--- a/ac108.c
+++ b/ac108.c
@@ -166,7 +166,7 @@ static const struct pll_div ac108_pll_div_list[] = {
 /* AC108 definition */
 #define AC108_CHANNELS_MAX		16		/* range[1, 16] */
 #define AC108_RATES 			(SNDRV_PCM_RATE_8000_96000 | SNDRV_PCM_RATE_KNOT)
-#define AC108_FORMATS			(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+#define AC108_FORMATS			(/* SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |*/ SNDRV_PCM_FMTBIT_S32_LE)
 
 static const DECLARE_TLV_DB_SCALE(tlv_adc_pga_gain, 0, 100, 0);
 static const DECLARE_TLV_DB_SCALE(tlv_ch_digital_vol, -11925,75,0);
@@ -1127,22 +1127,22 @@ static int ac108_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) {
 	case SND_SOC_DAIFMT_NB_NF:
 		dev_dbg(dai->dev, "AC108 config BCLK&LRCK polarity: BCLK_normal,LRCK_normal\n");
 		brck_polarity = BCLK_NORMAL_DRIVE_N_SAMPLE_P;
-		lrck_polarity = LRCK_LEFT_LOW_RIGHT_HIGH;
+		lrck_polarity = LRCK_LEFT_HIGH_RIGHT_LOW;
 		break;
 	case SND_SOC_DAIFMT_NB_IF:
 		dev_dbg(dai->dev, "AC108 config BCLK&LRCK polarity: BCLK_normal,LRCK_invert\n");
 		brck_polarity = BCLK_NORMAL_DRIVE_N_SAMPLE_P;
-		lrck_polarity = LRCK_LEFT_HIGH_RIGHT_LOW;
+		lrck_polarity = LRCK_LEFT_LOW_RIGHT_HIGH;
 		break;
 	case SND_SOC_DAIFMT_IB_NF:
 		dev_dbg(dai->dev, "AC108 config BCLK&LRCK polarity: BCLK_invert,LRCK_normal\n");
 		brck_polarity = BCLK_INVERT_DRIVE_P_SAMPLE_N;
-		lrck_polarity = LRCK_LEFT_LOW_RIGHT_HIGH;
+		lrck_polarity = LRCK_LEFT_HIGH_RIGHT_LOW;
 		break;
 	case SND_SOC_DAIFMT_IB_IF:
 		dev_dbg(dai->dev, "AC108 config BCLK&LRCK polarity: BCLK_invert,LRCK_invert\n");
 		brck_polarity = BCLK_INVERT_DRIVE_P_SAMPLE_N;
-		lrck_polarity = LRCK_LEFT_HIGH_RIGHT_LOW;
+		lrck_polarity = LRCK_LEFT_LOW_RIGHT_HIGH;
 		break;
 	default:
 		pr_err("AC108 config BCLK/LRCLK polarity error:%u\n\n", (fmt & SND_SOC_DAIFMT_INV_MASK) >> 8);
diff --git a/seeed-8mic-voicecard-overlay.dts b/seeed-8mic-voicecard-overlay.dts
index 684e665..978fb28 100644
--- a/seeed-8mic-voicecard-overlay.dts
+++ b/seeed-8mic-voicecard-overlay.dts
@@ -52,7 +52,7 @@
 				reg = <0x1a>;
 				#sound-dai-cells = <0>;
 			};
-/*
+
 			ac108_a: ac108@35{
 				compatible = "x-power,ac108_0";
 				reg = <0x35>;
@@ -66,7 +66,6 @@
 				#sound-dai-cells = <0>;
 				data-protocol = <0>;
 			};
-*/
 		};
 	};
 
@@ -75,26 +74,49 @@
 
 		sound_overlay: __overlay__ {
 			compatible = "simple-audio-card";
-			simple-audio-card,format = "dsp_a";
 			simple-audio-card,name = "seeed-8mic-voicecard"; 
-			status = "okay";
-
-			simple-audio-card,bitclock-master = <&codec_dai>;
-			simple-audio-card,frame-master = <&codec_dai>;
 			simple-audio-card,channels-playback-override = <8>;
 			simple-audio-card,channels-capture-override  = <8>;
+			status = "okay";
 
-			cpu_dai: simple-audio-card,cpu {
-				sound-dai = <&i2s>;
-				dai-tdm-slot-num     = <2>;
-				dai-tdm-slot-width   = <32>;
-				dai-tdm-slot-tx-mask = <1 1 0 0>;
-				dai-tdm-slot-rx-mask = <1 1 0 0>;
+			simple-audio-card,dai-link@0 {
+				format = "dsp_a";
+				bitclock-master = <&codec0_dai>;
+				frame-master = <&codec0_dai>;
+
+				cpu {
+					sound-dai = <&i2s>;
+					dai-tdm-slot-num     = <2>;
+					dai-tdm-slot-width   = <32>;
+					dai-tdm-slot-tx-mask = <1 1 0 0>;
+					dai-tdm-slot-rx-mask = <1 1 0 0>;
+				};
+
+				codec0_dai: codec {
+					sound-dai = <&ac108_b>;
+					clocks =  <&ac10x_mclk>;
+					system-clock-id = <1>;
+				};
 			};
-			codec_dai: simple-audio-card,codec {
-				sound-dai = <&ac101>;
-				clocks =  <&ac10x_mclk>;
-				system-clock-id = <1>;
+
+			simple-audio-card,dai-link@1 {
+				format = "dsp_a";
+				bitclock-master = <&codec1_dai>;
+				frame-master = <&codec1_dai>;
+
+				cpu {
+					sound-dai = <&i2s>;
+					dai-tdm-slot-num     = <2>;
+					dai-tdm-slot-width   = <32>;
+					dai-tdm-slot-tx-mask = <1 1 0 0>;
+					dai-tdm-slot-rx-mask = <1 1 0 0>;
+				};
+
+				codec1_dai: codec {
+					sound-dai = <&ac101>;
+					clocks =  <&ac10x_mclk>;
+					system-clock-id = <1>;
+				};
 			};
 		};
 	};
diff --git a/seeed-8mic-voicecard.dtbo b/seeed-8mic-voicecard.dtbo
index 1360e19..024d5e3 100644
Binary files a/seeed-8mic-voicecard.dtbo and b/seeed-8mic-voicecard.dtbo differ
diff --git a/simple-card.c b/simple-card.c
index 2f991bf..de08ffe 100644
--- a/simple-card.c
+++ b/simple-card.c
@@ -199,9 +199,6 @@ extern int ac10x_start_clock(void);
 
 static int asoc_simple_card_trigger(struct snd_pcm_substream *substream, int cmd)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
-
 	int ret = 0;
 
 	printk("%s() stream=%d  cmd=%d\n",