ASoC: cs42l73: Add DAPM events for power down.

Add power down delays between setting PDN and MCLKDIS for spk amp, spklo amp, and ear amp.

Signed-off-by: Paul Handrigan <Paul.Handrigan@cirrus.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 72 insertions, 8 deletions

diff --git a/sound/soc/codecs/cs42l73.c b/sound/soc/codecs/cs42l73.c
index 476679510dff..fb9b178d6ffe 100644
--- a/sound/soc/codecs/cs42l73.c
+++ b/sound/soc/codecs/cs42l73.c
@@ -40,6 +40,7 @@ struct  cs42l73_private {
         u32 sysclk;
         u8 mclksel;
         u32 mclk;
+        int shutdwn_delay;
 };
 
 static const struct reg_default cs42l73_reg_defaults[] = {
@@ -588,6 +589,57 @@ static const struct snd_kcontrol_new cs42l73_snd_controls[] = {
         SOC_ENUM("XSPOUT Mono/Stereo Select", xsp_output_mux_enum),
 };
 
+static int cs42l73_spklo_spk_amp_event(struct snd_soc_dapm_widget *w,
+        struct snd_kcontrol *kcontrol, int event)
+{
+        struct snd_soc_codec *codec = w->codec;
+        struct cs42l73_private *priv = snd_soc_codec_get_drvdata(codec);
+        switch (event) {
+        case SND_SOC_DAPM_POST_PMD:
+                /* 150 ms delay between setting PDN and MCLKDIS */
+                priv->shutdwn_delay = 150;
+                break;
+        default:
+                pr_err("Invalid event = 0x%x\n", event);
+        }
+        return 0;
+}
+
+static int cs42l73_ear_amp_event(struct snd_soc_dapm_widget *w,
+        struct snd_kcontrol *kcontrol, int event)
+{
+        struct snd_soc_codec *codec = w->codec;
+        struct cs42l73_private *priv = snd_soc_codec_get_drvdata(codec);
+        switch (event) {
+        case SND_SOC_DAPM_POST_PMD:
+                /* 50 ms delay between setting PDN and MCLKDIS */
+                if (priv->shutdwn_delay < 50)
+                        priv->shutdwn_delay = 50;
+                break;
+        default:
+                pr_err("Invalid event = 0x%x\n", event);
+        }
+        return 0;
+}
+
+
+static int cs42l73_hp_amp_event(struct snd_soc_dapm_widget *w,
+        struct snd_kcontrol *kcontrol, int event)
+{
+        struct snd_soc_codec *codec = w->codec;
+        struct cs42l73_private *priv = snd_soc_codec_get_drvdata(codec);
+        switch (event) {
+        case SND_SOC_DAPM_POST_PMD:
+                /* 30 ms delay between setting PDN and MCLKDIS */
+                if (priv->shutdwn_delay < 30)
+                        priv->shutdwn_delay = 30;
+                break;
+        default:
+                pr_err("Invalid event = 0x%x\n", event);
+        }
+        return 0;
+}
+
 static const struct snd_soc_dapm_widget cs42l73_dapm_widgets[] = {
         SND_SOC_DAPM_INPUT("DMICA"),
         SND_SOC_DAPM_INPUT("DMICB"),
@@ -676,16 +728,20 @@ static const struct snd_soc_dapm_widget cs42l73_dapm_widgets[] = {
         SND_SOC_DAPM_PGA("SPK DAC", SND_SOC_NOPM, 0, 0, NULL, 0),
         SND_SOC_DAPM_PGA("ESL DAC", SND_SOC_NOPM, 0, 0, NULL, 0),
 
-        SND_SOC_DAPM_SWITCH("HP Amp", CS42L73_PWRCTL3, 0, 1,
-                            &hp_amp_ctl),
+        SND_SOC_DAPM_SWITCH_E("HP Amp",  CS42L73_PWRCTL3, 0, 1,
+                            &hp_amp_ctl, cs42l73_hp_amp_event,
+                        SND_SOC_DAPM_POST_PMD),
         SND_SOC_DAPM_SWITCH("LO Amp", CS42L73_PWRCTL3, 1, 1,
                             &lo_amp_ctl),
-        SND_SOC_DAPM_SWITCH("SPK Amp", CS42L73_PWRCTL3, 2, 1,
-                            &spk_amp_ctl),
-        SND_SOC_DAPM_SWITCH("EAR Amp", CS42L73_PWRCTL3, 3, 1,
-                            &ear_amp_ctl),
-        SND_SOC_DAPM_SWITCH("SPKLO Amp", CS42L73_PWRCTL3, 4, 1,
-                            &spklo_amp_ctl),
+        SND_SOC_DAPM_SWITCH_E("SPK Amp", CS42L73_PWRCTL3, 2, 1,
+                        &spk_amp_ctl, cs42l73_spklo_spk_amp_event,
+                        SND_SOC_DAPM_POST_PMD),
+        SND_SOC_DAPM_SWITCH_E("EAR Amp", CS42L73_PWRCTL3, 3, 1,
+                            &ear_amp_ctl, cs42l73_ear_amp_event,
+                        SND_SOC_DAPM_POST_PMD),
+        SND_SOC_DAPM_SWITCH_E("SPKLO Amp", CS42L73_PWRCTL3, 4, 1,
+                            &spklo_amp_ctl, cs42l73_spklo_spk_amp_event,
+                        SND_SOC_DAPM_POST_PMD),
 
         SND_SOC_DAPM_OUTPUT("HPOUTA"),
         SND_SOC_DAPM_OUTPUT("HPOUTB"),
@@ -1171,6 +1227,14 @@ static int cs42l73_set_bias_level(struct snd_soc_codec *codec,
 
         case SND_SOC_BIAS_OFF:
                 snd_soc_update_bits(codec, CS42L73_PWRCTL1, PDN, 1);
+                if (cs42l73->shutdwn_delay > 0) {
+                        mdelay(cs42l73->shutdwn_delay);
+                        cs42l73->shutdwn_delay = 0;
+                } else {
+                        mdelay(15); /* Min amount of time requred to power
+                                     * down.
+                                     */
+                }
                 snd_soc_update_bits(codec, CS42L73_DMMCC, MCLKDIS, 1);
                 break;
         }