ASoC: mediatek: mt6358: support DMIC one-wire mode

Supports DMIC one-wire mode. Uses a DT property "dmic-mode" to select.

Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Link: https://lore.kernel.org/r/1591353222-18576-2-git-send-email-jiaxin.yu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/mt6358.c b/sound/soc/codecs/mt6358.c
index 1b830ea..1f39d59 100644 (file)
--- 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;
+
+       unsigned int dmic_one_wire_mode;
 };
 
 int mt6358_set_mtkaif_protocol(struct snd_soc_component *cmpnt,
@@ -1831,7 +1833,10 @@ static int mt6358_dmic_enable(struct mt6358_priv *priv)
        mt6358_mtkaif_tx_enable(priv);
 
        /* UL dmic setting */
-       regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_H, 0x0080);
+       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, 0x0003);
@@ -2426,6 +2431,20 @@ static const struct snd_soc_component_driver mt6358_soc_component_driver = {
        .num_dapm_routes = ARRAY_SIZE(mt6358_dapm_routes),
 };
 
+static void mt6358_parse_dt(struct mt6358_priv *priv)
+{
+       int ret;
+       struct device *dev = priv->dev;
+
+       ret = of_property_read_u32(dev->of_node, "mediatek,dmic-mode",
+                                  &priv->dmic_one_wire_mode);
+       if (ret) {
+               dev_warn(priv->dev, "%s() failed to read dmic-mode\n",
+                        __func__);
+               priv->dmic_one_wire_mode = 0;
+       }
+}
+
 static int mt6358_platform_driver_probe(struct platform_device *pdev)
 {
        struct mt6358_priv *priv;
@@ -2445,6 +2464,8 @@ static int mt6358_platform_driver_probe(struct platform_device *pdev)
        if (IS_ERR(priv->regmap))
                return PTR_ERR(priv->regmap);
 
+       mt6358_parse_dt(priv);
+
        dev_info(priv->dev, "%s(), dev name %s\n",
                 __func__, dev_name(&pdev->dev));