ASoC: rt298: reset AD dilter is there is no MCLK

rt298 need to reset AD filter and the ADC settings will take effort.
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt298.c

@@ -481,6 +481,26 @@ static int rt298_adc_event(struct snd_soc_dapm_widget *w,
 		snd_soc_update_bits(codec,
 			VERB_CMD(AC_VERB_SET_AMP_GAIN_MUTE, nid, 0),
 			0x7080, 0x7000);
+		 /* If MCLK doesn't exist, reset AD filter */
+		if (!(snd_soc_read(codec, RT298_VAD_CTRL) & 0x200)) {
+			pr_info("NO MCLK\n");
+			switch (nid) {
+			case RT298_ADC_IN1:
+				snd_soc_update_bits(codec,
+					RT298_D_FILTER_CTRL, 0x2, 0x2);
+				mdelay(10);
+				snd_soc_update_bits(codec,
+					RT298_D_FILTER_CTRL, 0x2, 0x0);
+				break;
+			case RT298_ADC_IN2:
+				snd_soc_update_bits(codec,
+					RT298_D_FILTER_CTRL, 0x4, 0x4);
+				mdelay(10);
+				snd_soc_update_bits(codec,
+					RT298_D_FILTER_CTRL, 0x4, 0x0);
+				break;
+			}
+		}
 		break;
 	case SND_SOC_DAPM_PRE_PMD:
 		snd_soc_update_bits(codec,

sound/soc/codecs/rt298.h

@@ -137,6 +137,7 @@
 #define RT298_A_BIAS_CTRL2	0x02
 #define RT298_POWER_CTRL1	0x03
 #define RT298_A_BIAS_CTRL3	0x04
+#define RT298_D_FILTER_CTRL	0x05
 #define RT298_POWER_CTRL2	0x08
 #define RT298_I2S_CTRL1		0x09
 #define RT298_I2S_CTRL2		0x0a
@@ -148,6 +149,7 @@
 #define RT298_IRQ_CTRL		0x33
 #define RT298_WIND_FILTER_CTRL	0x46
 #define RT298_PLL_CTRL1		0x49
+#define RT298_VAD_CTRL		0x4e
 #define RT298_CBJ_CTRL1		0x4f
 #define RT298_CBJ_CTRL2		0x50
 #define RT298_PLL_CTRL		0x63