ASoC: mediatek: mt8183: support WoV

Add DAI link and pin muxing for wake on voice.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20191019143504.4.Ibf012d0cd8679d846213606dc5f426aea1ff590a@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/mediatek/Kconfig b/sound/soc/mediatek/Kconfig
index 111e44b..8b29f39 100644 (file)
--- a/sound/soc/mediatek/Kconfig
+++ b/sound/soc/mediatek/Kconfig
@@ -125,6 +125,7 @@ config SND_SOC_MT8183_MT6358_TS3A227E_MAX98357A
        select SND_SOC_MAX98357A
        select SND_SOC_BT_SCO
        select SND_SOC_TS3A227E
+       select SND_SOC_CROS_EC_CODEC
        help
          This adds ASoC driver for Mediatek MT8183 boards
          with the MT6358 TS3A227E MAX98357A audio codec.

diff --git a/sound/soc/mediatek/mt8183/mt8183-mt6358-ts3a227-max98357.c b/sound/soc/mediatek/mt8183/mt8183-mt6358-ts3a227-max98357.c
index bb9cdc0..0555f7d 100644 (file)
--- a/sound/soc/mediatek/mt8183/mt8183-mt6358-ts3a227-max98357.c
+++ b/sound/soc/mediatek/mt8183/mt8183-mt6358-ts3a227-max98357.c
@@ -19,11 +19,12 @@ enum PINCTRL_PIN_STATE {
        PIN_STATE_DEFAULT = 0,
        PIN_TDM_OUT_ON,
        PIN_TDM_OUT_OFF,
+       PIN_WOV,
        PIN_STATE_MAX
 };
 
 static const char * const mt8183_pin_str[PIN_STATE_MAX] = {
-       "default", "aud_tdm_out_on", "aud_tdm_out_off",
+       "default", "aud_tdm_out_on", "aud_tdm_out_off", "wov",
 };
 
 struct mt8183_mt6358_ts3a227_max98357_priv {
@@ -142,6 +143,11 @@ SND_SOC_DAILINK_DEFS(playback_hdmi,
        DAILINK_COMP_ARRAY(COMP_DUMMY()),
        DAILINK_COMP_ARRAY(COMP_EMPTY()));
 
+SND_SOC_DAILINK_DEFS(wake_on_voice,
+       DAILINK_COMP_ARRAY(COMP_DUMMY()),
+       DAILINK_COMP_ARRAY(COMP_DUMMY()),
+       DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
 /* BE */
 SND_SOC_DAILINK_DEFS(primary_codec,
        DAILINK_COMP_ARRAY(COMP_CPU("ADDA")),
@@ -229,6 +235,41 @@ static struct snd_soc_ops mt8183_mt6358_tdm_ops = {
        .shutdown = mt8183_mt6358_tdm_shutdown,
 };
 
+static int
+mt8183_mt6358_ts3a227_max98357_wov_startup(
+       struct snd_pcm_substream *substream)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_card *card = rtd->card;
+       struct mt8183_mt6358_ts3a227_max98357_priv *priv =
+                       snd_soc_card_get_drvdata(card);
+
+       return pinctrl_select_state(priv->pinctrl,
+                                   priv->pin_states[PIN_WOV]);
+}
+
+static void
+mt8183_mt6358_ts3a227_max98357_wov_shutdown(
+       struct snd_pcm_substream *substream)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_card *card = rtd->card;
+       struct mt8183_mt6358_ts3a227_max98357_priv *priv =
+                       snd_soc_card_get_drvdata(card);
+       int ret;
+
+       ret = pinctrl_select_state(priv->pinctrl,
+                                  priv->pin_states[PIN_STATE_DEFAULT]);
+       if (ret)
+               dev_err(card->dev, "%s failed to select state %d\n",
+                       __func__, ret);
+}
+
+static const struct snd_soc_ops mt8183_mt6358_ts3a227_max98357_wov_ops = {
+       .startup = mt8183_mt6358_ts3a227_max98357_wov_startup,
+       .shutdown = mt8183_mt6358_ts3a227_max98357_wov_shutdown,
+};
+
 static struct snd_soc_dai_link
 mt8183_mt6358_ts3a227_max98357_dai_links[] = {
        /* FE */
@@ -306,6 +347,15 @@ mt8183_mt6358_ts3a227_max98357_dai_links[] = {
                .dpcm_playback = 1,
                SND_SOC_DAILINK_REG(playback_hdmi),
        },
+       {
+               .name = "Wake on Voice",
+               .stream_name = "Wake on Voice",
+               .ignore_suspend = 1,
+               .ignore = 1,
+               SND_SOC_DAILINK_REG(wake_on_voice),
+               .ops = &mt8183_mt6358_ts3a227_max98357_wov_ops,
+       },
+
        /* BE */
        {
                .name = "Primary Codec",
@@ -429,7 +479,7 @@ static int
 mt8183_mt6358_ts3a227_max98357_dev_probe(struct platform_device *pdev)
 {
        struct snd_soc_card *card = &mt8183_mt6358_ts3a227_max98357_card;
-       struct device_node *platform_node;
+       struct device_node *platform_node, *ec_codec;
        struct snd_soc_dai_link *dai_link;
        struct mt8183_mt6358_ts3a227_max98357_priv *priv;
        int ret;
@@ -444,10 +494,24 @@ mt8183_mt6358_ts3a227_max98357_dev_probe(struct platform_device *pdev)
                return -EINVAL;
        }
 
+       ec_codec = of_parse_phandle(pdev->dev.of_node, "mediatek,ec-codec", 0);
+
        for_each_card_prelinks(card, i, dai_link) {
                if (dai_link->platforms->name)
                        continue;
-               dai_link->platforms->of_node = platform_node;
+
+               if (ec_codec && strcmp(dai_link->name, "Wake on Voice") == 0) {
+                       dai_link->cpus[0].name = NULL;
+                       dai_link->cpus[0].of_node = ec_codec;
+                       dai_link->cpus[0].dai_name = NULL;
+                       dai_link->codecs[0].name = NULL;
+                       dai_link->codecs[0].of_node = ec_codec;
+                       dai_link->codecs[0].dai_name = "Wake on Voice";
+                       dai_link->platforms[0].of_node = ec_codec;
+                       dai_link->ignore = 0;
+               } else {
+                       dai_link->platforms->of_node = platform_node;
+               }
        }
 
        mt8183_mt6358_ts3a227_max98357_headset_dev.dlc.of_node =