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>

2 files changed, 22 insertions, 0 deletions

diff --git a/sound/soc/codecs/rt298.c b/sound/soc/codecs/rt298.c
index f0e6c06e89ac..178b1cc22e05 100644
--- a/sound/soc/codecs/rt298.c
+++ b/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,
diff --git a/sound/soc/codecs/rt298.h b/sound/soc/codecs/rt298.h
index d66f8847b676..3638f3d61209 100644
--- a/sound/soc/codecs/rt298.h
+++ b/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