[PATCH AUTOSEL 5.4 058/108] ASoC: mediatek: mt8183-da7219: pull TDM GPIO pins down when probed

Sasha Levin
2020-04-11T23:11:08Z

From: Tzung-Bi Shih <tzungbi@google.com>

[ Upstream commit 8726ee6148fe24e2b29d4a961ad95c4ff8025d1d ]

1. Switch TDM GPIO pins according to playback on or off.
2. Pull TDM GPIO pins down when probed to avoid current leakage.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200213112003.2.I1d568b0c99742c6e755d051aadfd52e4be3cc0a5@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../mediatek/mt8183/mt8183-da7219-max98357.c | 104 +++++++++++++++++-
1 file changed, 98 insertions(+), 6 deletions(-)

diff --git a/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c b/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c
index 43f99e59a0786..897a7bc4d3f3f 100644
--- a/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c
+++ b/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c
@@ -18,6 +18,22 @@

static struct snd_soc_jack headset_jack;

+enum PINCTRL_PIN_STATE {
+ PIN_STATE_DEFAULT = 0,
+ PIN_TDM_OUT_ON,
+ PIN_TDM_OUT_OFF,
+ PIN_STATE_MAX
+};
+
+static const char * const mt8183_pin_str[PIN_STATE_MAX] = {
+ "default", "aud_tdm_out_on", "aud_tdm_out_off",
+};
+
+struct mt8183_da7219_max98357_priv {
+ struct pinctrl *pinctrl;
+ struct pinctrl_state *pin_states[PIN_STATE_MAX];
+};
+
static int mt8183_mt6358_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
@@ -204,6 +220,47 @@ SND_SOC_DAILINK_DEFS(tdm,
DAILINK_COMP_ARRAY(COMP_DUMMY()),
DAILINK_COMP_ARRAY(COMP_EMPTY()));

+static int mt8183_da7219_tdm_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct mt8183_da7219_max98357_priv *priv =
+ snd_soc_card_get_drvdata(rtd->card);
+ int ret;
+
+ if (IS_ERR(priv->pin_states[PIN_TDM_OUT_ON]))
+ return PTR_ERR(priv->pin_states[PIN_TDM_OUT_ON]);
+
+ ret = pinctrl_select_state(priv->pinctrl,
+ priv->pin_states[PIN_TDM_OUT_ON]);
+ if (ret)
+ dev_err(rtd->card->dev, "%s failed to select state %d\n",
+ __func__, ret);
+
+ return ret;
+}
+
+static void mt8183_da7219_tdm_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct mt8183_da7219_max98357_priv *priv =
+ snd_soc_card_get_drvdata(rtd->card);
+ int ret;
+
+ if (IS_ERR(priv->pin_states[PIN_TDM_OUT_OFF]))
+ return;
+
+ ret = pinctrl_select_state(priv->pinctrl,
+ priv->pin_states[PIN_TDM_OUT_OFF]);
+ if (ret)
+ dev_err(rtd->card->dev, "%s failed to select state %d\n",
+ __func__, ret);
+}
+
+static struct snd_soc_ops mt8183_da7219_tdm_ops = {
+ .startup = mt8183_da7219_tdm_startup,
+ .shutdown = mt8183_da7219_tdm_shutdown,
+};
+
static struct snd_soc_dai_link mt8183_da7219_max98357_dai_links[] = {
/* FE */
{
@@ -353,6 +410,8 @@ static struct snd_soc_dai_link mt8183_da7219_max98357_dai_links[] = {
.no_pcm = 1,
.dpcm_playback = 1,
.ignore_suspend = 1,
+ .be_hw_params_fixup = mt8183_i2s_hw_params_fixup,
+ .ops = &mt8183_da7219_tdm_ops,
SND_SOC_DAILINK_REG(tdm),
},
};
@@ -409,7 +468,7 @@ static int mt8183_da7219_max98357_dev_probe(struct platform_device *pdev)
struct snd_soc_card *card = &mt8183_da7219_max98357_card;
struct device_node *platform_node;
struct snd_soc_dai_link *dai_link;
- struct pinctrl *default_pins;
+ struct mt8183_da7219_max98357_priv *priv;
int ret, i;

card->dev = &pdev->dev;
@@ -443,12 +502,45 @@ static int mt8183_da7219_max98357_dev_probe(struct platform_device *pdev)
return ret;
}

- default_pins =
- devm_pinctrl_get_select(&pdev->dev, PINCTRL_STATE_DEFAULT);
- if (IS_ERR(default_pins)) {
- dev_err(&pdev->dev, "%s set pins failed\n",
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ snd_soc_card_set_drvdata(card, priv);
+
+ priv->pinctrl = devm_pinctrl_get(&pdev->dev);
+ if (IS_ERR(priv->pinctrl)) {
+ dev_err(&pdev->dev, "%s devm_pinctrl_get failed\n",
__func__);
- return PTR_ERR(default_pins);
+ return PTR_ERR(priv->pinctrl);
+ }
+
+ for (i = 0; i < PIN_STATE_MAX; i++) {
+ priv->pin_states[i] = pinctrl_lookup_state(priv->pinctrl,
+ mt8183_pin_str[i]);
+ if (IS_ERR(priv->pin_states[i])) {
+ ret = PTR_ERR(priv->pin_states[i]);
+ dev_info(&pdev->dev, "%s Can't find pin state %s %d\n",
+ __func__, mt8183_pin_str[i], ret);
+ }
+ }
+
+ if (!IS_ERR(priv->pin_states[PIN_TDM_OUT_OFF])) {
+ ret = pinctrl_select_state(priv->pinctrl,
+ priv->pin_states[PIN_TDM_OUT_OFF]);
+ if (ret)
+ dev_info(&pdev->dev,
+ "%s failed to select state %d\n",
+ __func__, ret);
+ }
+
+ if (!IS_ERR(priv->pin_states[PIN_STATE_DEFAULT])) {
+ ret = pinctrl_select_state(priv->pinctrl,
+ priv->pin_states[PIN_STATE_DEFAULT]);
+ if (ret)
+ dev_info(&pdev->dev,
+ "%s failed to select state %d\n",
+ __func__, ret);
}

return ret;
--
2.20.1