6 files changed, 47 insertions, 4 deletions

diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index f0361c031927..fc87be4fdc25 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -164,6 +164,10 @@ struct wm8994_pdata {
         int num_micd_rates;
         struct wm8958_micd_rate *micd_rates;
 
+        /* Power up delays to add after microphone bias power up (ms) */
+        int micb1_delay;
+        int micb2_delay;
+
         /* LINEOUT can be differential or single ended */
         unsigned int lineout1_diff:1;
         unsigned int lineout2_diff:1;
diff --git a/include/sound/wm8993.h b/include/sound/wm8993.h
index eee19f63c0d8..8016fd826f5a 100644
--- a/include/sound/wm8993.h
+++ b/include/sound/wm8993.h
@@ -32,6 +32,10 @@ struct wm8993_platform_data {
         unsigned int lineout1fb:1;
         unsigned int lineout2fb:1;
 
+        /* Delay to add for microphones to stabalise after power up */
+        int micbias1_delay;
+        int micbias2_delay;
+
         /* Microphone biases: 0=0.9*AVDD1 1=0.65*AVVD1 */
         unsigned int micbias1_lvl:1;
         unsigned int micbias2_lvl:1;
diff --git a/sound/soc/codecs/wm8993.c b/sound/soc/codecs/wm8993.c
index 9fd80d688979..94737a30716b 100644
--- a/sound/soc/codecs/wm8993.c
+++ b/sound/soc/codecs/wm8993.c
@@ -1520,6 +1520,8 @@ static int wm8993_probe(struct snd_soc_codec *codec)
                                       wm8993->pdata.lineout2fb,
                                       wm8993->pdata.jd_scthr,
                                       wm8993->pdata.jd_thr,
+                                      wm8993->pdata.micbias1_delay,
+                                      wm8993->pdata.micbias2_delay,
                                       wm8993->pdata.micbias1_lvl,
                                       wm8993->pdata.micbias2_lvl);
 
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 353612eec8bf..b74df52d2820 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -3145,6 +3145,8 @@ static void wm8994_handle_pdata(struct wm8994_priv *wm8994)
                                       pdata->lineout2fb,
                                       pdata->jd_scthr,
                                       pdata->jd_thr,
+                                      pdata->micb1_delay,
+                                      pdata->micb2_delay,
                                       pdata->micbias1_lvl,
                                       pdata->micbias2_lvl);
 
diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c
index b2e939a8970e..7a773a835b8e 100644
--- a/sound/soc/codecs/wm_hubs.c
+++ b/sound/soc/codecs/wm_hubs.c
@@ -644,6 +644,28 @@ static int lineout_event(struct snd_soc_dapm_widget *w,
         return 0;
 }
 
+static int micbias_event(struct snd_soc_dapm_widget *w,
+                         struct snd_kcontrol *kcontrol, int event)
+{
+        struct snd_soc_codec *codec = w->codec;
+        struct wm_hubs_data *hubs = snd_soc_codec_get_drvdata(codec);
+
+        switch (w->shift) {
+        case WM8993_MICB1_ENA_SHIFT:
+                if (hubs->micb1_delay)
+                        msleep(hubs->micb1_delay);
+                break;
+        case WM8993_MICB2_ENA_SHIFT:
+                if (hubs->micb2_delay)
+                        msleep(hubs->micb2_delay);
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
 void wm_hubs_update_class_w(struct snd_soc_codec *codec)
 {
         struct wm_hubs_data *hubs = snd_soc_codec_get_drvdata(codec);
@@ -834,8 +856,10 @@ SND_SOC_DAPM_INPUT("IN1RP"),
 SND_SOC_DAPM_INPUT("IN2RN"),
 SND_SOC_DAPM_INPUT("IN2RP:VXRP"),
 
-SND_SOC_DAPM_SUPPLY("MICBIAS2", WM8993_POWER_MANAGEMENT_1, 5, 0, NULL, 0),
-SND_SOC_DAPM_SUPPLY("MICBIAS1", WM8993_POWER_MANAGEMENT_1, 4, 0, NULL, 0),
+SND_SOC_DAPM_SUPPLY("MICBIAS2", WM8993_POWER_MANAGEMENT_1, 5, 0,
+                    micbias_event, SND_SOC_DAPM_POST_PMU),
+SND_SOC_DAPM_SUPPLY("MICBIAS1", WM8993_POWER_MANAGEMENT_1, 4, 0,
+                    micbias_event, SND_SOC_DAPM_POST_PMU),
 
 SND_SOC_DAPM_MIXER("IN1L PGA", WM8993_POWER_MANAGEMENT_2, 6, 0,
                    in1l_pga, ARRAY_SIZE(in1l_pga)),
@@ -1170,13 +1194,16 @@ EXPORT_SYMBOL_GPL(wm_hubs_add_analogue_routes);
 int wm_hubs_handle_analogue_pdata(struct snd_soc_codec *codec,
                                   int lineout1_diff, int lineout2_diff,
                                   int lineout1fb, int lineout2fb,
-                                  int jd_scthr, int jd_thr, int micbias1_lvl,
-                                  int micbias2_lvl)
+                                  int jd_scthr, int jd_thr,
+                                  int micbias1_delay, int micbias2_delay,
+                                  int micbias1_lvl, int micbias2_lvl)
 {
         struct wm_hubs_data *hubs = snd_soc_codec_get_drvdata(codec);
 
         hubs->lineout1_se = !lineout1_diff;
         hubs->lineout2_se = !lineout2_diff;
+        hubs->micb1_delay = micbias1_delay;
+        hubs->micb2_delay = micbias2_delay;
 
         if (!lineout1_diff)
                 snd_soc_update_bits(codec, WM8993_LINE_MIXER1,
diff --git a/sound/soc/codecs/wm_hubs.h b/sound/soc/codecs/wm_hubs.h
index a5a09e6f87d5..24c763df21f9 100644
--- a/sound/soc/codecs/wm_hubs.h
+++ b/sound/soc/codecs/wm_hubs.h
@@ -36,6 +36,9 @@ struct wm_hubs_data {
         struct list_head dcs_cache;
         bool (*check_class_w_digital)(struct snd_soc_codec *);
 
+        int micb1_delay;
+        int micb2_delay;
+
         bool lineout1_se;
         bool lineout1n_ena;
         bool lineout1p_ena;
@@ -56,6 +59,7 @@ extern int wm_hubs_handle_analogue_pdata(struct snd_soc_codec *,
                                          int lineout1_diff, int lineout2_diff,
                                          int lineout1fb, int lineout2fb,
                                          int jd_scthr, int jd_thr,
+                                         int micbias1_dly, int micbias2_dly,
                                          int micbias1_lvl, int micbias2_lvl);
 
 extern irqreturn_t wm_hubs_dcs_done(int irq, void *data);