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Diffstat (limited to 'sound/soc/codecs/da7219.c')
-rw-r--r--sound/soc/codecs/da7219.c44
1 files changed, 38 insertions, 6 deletions
diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c
index c0144f2f8174..e46e9f4bc994 100644
--- a/sound/soc/codecs/da7219.c
+++ b/sound/soc/codecs/da7219.c
@@ -768,6 +768,30 @@ static const struct snd_kcontrol_new da7219_st_out_filtr_mix_controls[] = {
* DAPM Events
*/
+static int da7219_mic_pga_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+ struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
+
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMU:
+ if (da7219->micbias_on_event) {
+ /*
+ * Delay only for first capture after bias enabled to
+ * avoid possible DC offset related noise.
+ */
+ da7219->micbias_on_event = false;
+ msleep(da7219->mic_pga_delay);
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
static int da7219_dai_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
@@ -937,12 +961,12 @@ static const struct snd_soc_dapm_widget da7219_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("MIC"),
/* Input PGAs */
- SND_SOC_DAPM_PGA("Mic PGA", DA7219_MIC_1_CTRL,
- DA7219_MIC_1_AMP_EN_SHIFT, DA7219_NO_INVERT,
- NULL, 0),
- SND_SOC_DAPM_PGA("Mixin PGA", DA7219_MIXIN_L_CTRL,
- DA7219_MIXIN_L_AMP_EN_SHIFT, DA7219_NO_INVERT,
- NULL, 0),
+ SND_SOC_DAPM_PGA_E("Mic PGA", DA7219_MIC_1_CTRL,
+ DA7219_MIC_1_AMP_EN_SHIFT, DA7219_NO_INVERT,
+ NULL, 0, da7219_mic_pga_event, SND_SOC_DAPM_POST_PMU),
+ SND_SOC_DAPM_PGA_E("Mixin PGA", DA7219_MIXIN_L_CTRL,
+ DA7219_MIXIN_L_AMP_EN_SHIFT, DA7219_NO_INVERT,
+ NULL, 0, da7219_settling_event, SND_SOC_DAPM_POST_PMU),
/* Input Filters */
SND_SOC_DAPM_ADC("ADC", NULL, DA7219_ADC_L_CTRL, DA7219_ADC_L_EN_SHIFT,
@@ -1847,6 +1871,14 @@ static void da7219_handle_pdata(struct snd_soc_component *component)
snd_soc_component_write(component, DA7219_MICBIAS_CTRL, micbias_lvl);
+ /*
+ * Calculate delay required to compensate for DC offset in
+ * Mic PGA, based on Mic Bias voltage.
+ */
+ da7219->mic_pga_delay = DA7219_MIC_PGA_BASE_DELAY +
+ (pdata->micbias_lvl *
+ DA7219_MIC_PGA_OFFSET_DELAY);
+
/* Mic */
switch (pdata->mic_amp_in_sel) {
case DA7219_MIC_AMP_IN_SEL_DIFF: