[PATCH] ASoC: mediatek: mt6358: support DMIC one-wire mode

[Jiaxin Yu]

Supports DMIC one-wire mode. Adds a mixer control to enable and disable.

Signed-off-by: Jiaxin Yu <jiaxin...@mediatek.com>
Reviewed-by: Tzung-Bi Shih <tzun...@google.com>
---
 sound/soc/codecs/mt6358.c | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/mt6358.c b/sound/soc/codecs/mt6358.c
index 1b830ea..ca7628d 100644
--- a/sound/soc/codecs/mt6358.c
+++ b/sound/soc/codecs/mt6358.c
@@ -95,6 +95,8 @@ struct mt6358_priv {
        struct regulator *avdd_reg;
 
        int wov_enabled;
+
+       int dmic_one_wire_mode;
 };
 
 int mt6358_set_mtkaif_protocol(struct snd_soc_component *cmpnt,
@@ -566,6 +568,28 @@ static int mt6358_put_wov(struct snd_kcontrol *kcontrol,
        return 0;
 }
 
+static int mt6358_dmic_one_wire_mode_get(struct snd_kcontrol *kcontrol,
+                                        struct snd_ctl_elem_value *ucontrol)
+{
+       struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+       struct mt6358_priv *priv = snd_soc_component_get_drvdata(cmpnt);
+
+       ucontrol->value.integer.value[0] = priv->dmic_one_wire_mode;
+
+       return 0;
+}
+
+static int mt6358_dmic_one_wire_mode_set(struct snd_kcontrol *kcontrol,
+                                        struct snd_ctl_elem_value *ucontrol)
+{
+       struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+       struct mt6358_priv *priv = snd_soc_component_get_drvdata(cmpnt);
+
+       priv->dmic_one_wire_mode = ucontrol->value.integer.value[0];
+
+       return 0;
+}
+
 static const DECLARE_TLV_DB_SCALE(playback_tlv, -1000, 100, 0);
 static const DECLARE_TLV_DB_SCALE(pga_tlv, 0, 600, 0);
 
@@ -588,6 +612,10 @@ static int mt6358_put_wov(struct snd_kcontrol *kcontrol,
 
        SOC_SINGLE_BOOL_EXT("Wake-on-Voice Phase2 Switch", 0,
                            mt6358_get_wov, mt6358_put_wov),
+
+       SOC_SINGLE_BOOL_EXT("Dmic One Wire Mode", 0,
+                           mt6358_dmic_one_wire_mode_get,
+                           mt6358_dmic_one_wire_mode_set),
 };
 
 /* MUX */
@@ -1740,7 +1768,10 @@ static int mt6358_amic_enable(struct mt6358_priv *priv)
        mt6358_mtkaif_tx_enable(priv);
 
        /* UL dmic setting off */
-       regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_H, 0x0000);
+       if (priv->dmic_one_wire_mode)
+               regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_H, 0x0400);
+       else
+               regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_H, 0x0080);
 
        /* UL turn on */
        regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_L, 0x0001);
-- 
1.8.1.1.dirty