ASoC: codecs: da9055: Minor improvement in ALC calibration process

This patch slightly improves ALC calibration process of da9055 codec
driver by muting Mic PGAs during calibration.

Signed-off-by: Ashish Chavan <ashish.chavan@kpitcummins.com>
Signed-off-by: David Dajun Chen <david.chen@diasemi.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 21 insertions, 1 deletions

diff --git a/sound/soc/codecs/da9055.c b/sound/soc/codecs/da9055.c
index 185d8dd36399..f379b085c392 100644
--- a/sound/soc/codecs/da9055.c
+++ b/sound/soc/codecs/da9055.c
@@ -178,6 +178,12 @@
 #define DA9055_AIF_WORD_S24_LE          (2 << 2)
 #define DA9055_AIF_WORD_S32_LE          (3 << 2)
 
+/* MIC_L_CTRL bit fields */
+#define DA9055_MIC_L_MUTE_EN            (1 << 6)
+
+/* MIC_R_CTRL bit fields */
+#define DA9055_MIC_R_MUTE_EN            (1 << 6)
+
 /* MIXIN_L_CTRL bit fields */
 #define DA9055_MIXIN_L_MIX_EN           (1 << 3)
 
@@ -476,7 +482,7 @@ static int da9055_put_alc_sw(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_value *ucontrol)
 {
         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
-        u8 reg_val, adc_left, adc_right;
+        u8 reg_val, adc_left, adc_right, mic_left, mic_right;
         int avg_left_data, avg_right_data, offset_l, offset_r;
 
         if (ucontrol->value.integer.value[0]) {
@@ -485,6 +491,16 @@ static int da9055_put_alc_sw(struct snd_kcontrol *kcontrol,
                  * offsets must be done first
                  */
 
+                /* Save current values from Mic control registers */
+                mic_left = snd_soc_read(codec, DA9055_MIC_L_CTRL);
+                mic_right = snd_soc_read(codec, DA9055_MIC_R_CTRL);
+
+                /* Mute Mic PGA Left and Right */
+                snd_soc_update_bits(codec, DA9055_MIC_L_CTRL,
+                                    DA9055_MIC_L_MUTE_EN, DA9055_MIC_L_MUTE_EN);
+                snd_soc_update_bits(codec, DA9055_MIC_R_CTRL,
+                                    DA9055_MIC_R_MUTE_EN, DA9055_MIC_R_MUTE_EN);
+
                 /* Save current values from ADC control registers */
                 adc_left = snd_soc_read(codec, DA9055_ADC_L_CTRL);
                 adc_right = snd_soc_read(codec, DA9055_ADC_R_CTRL);
@@ -520,6 +536,10 @@ static int da9055_put_alc_sw(struct snd_kcontrol *kcontrol,
                 /* Restore original values of ADC control registers */
                 snd_soc_write(codec, DA9055_ADC_L_CTRL, adc_left);
                 snd_soc_write(codec, DA9055_ADC_R_CTRL, adc_right);
+
+                /* Restore original values of Mic control registers */
+                snd_soc_write(codec, DA9055_MIC_L_CTRL, mic_left);
+                snd_soc_write(codec, DA9055_MIC_R_CTRL, mic_right);
         }
 
         return snd_soc_put_volsw(kcontrol, ucontrol);