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authorAshish Chavan <ashish.chavan@kpitcummins.com>2012-10-11 14:04:37 +0530
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-10-11 17:42:31 +0900
commitc7c0f2cdef1362c5fe301a1ffa8379824ee3f813 (patch)
treed3848d3c93ce6b6db76b20befb91c9822474f4d8 /sound
parent961a7aeafab477f63d9eef26afde9cbb8badcd0f (diff)
downloadvexpress-lsk-c7c0f2cdef1362c5fe301a1ffa8379824ee3f813.tar.gz
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/da9055.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/sound/soc/codecs/da9055.c b/sound/soc/codecs/da9055.c
index 185d8dd3639..f379b085c39 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);