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

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Date:   Fri, 29 May 2020 19:04:53 +0800
From:   Jiaxin Yu <jiaxin.yu@...iatek.com>
To:     <lgirdwood@...il.com>, <broonie@...nel.org>, <tiwai@...e.com>,
        <matthias.bgg@...il.com>, <hariprasad.kelam@...il.com>
CC:     <alsa-devel@...a-project.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <howie.huang@...iatek.com>,
        <tzungbi@...gle.com>, Jiaxin Yu <jiaxin.yu@...iatek.com>
Subject: [PATCH] ASoC: mediatek: mt6358: support DMIC one-wire mode

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

Signed-off-by: Jiaxin Yu <jiaxin.yu@...iatek.com>
Reviewed-by: Tzung-Bi Shih <tzungbi@...gle.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