[PATCH RFC 1/2] ASoC: Intel: sof_es8336: support a separate gpio to control headphone

[Mauro Carvalho Chehab]

From: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>

Some devices may use both gpio0 and gpio1 to independently switch
the speaker and the headphone.

Add support for that.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
---

See [PATCH RFC 0/2] at: https://lore.kernel.org/all/cover.1648975926.git.mchehab@xxxxxxxxxx/

 sound/soc/intel/boards/sof_es8336.c | 76 +++++++++++++++++++++--------
 1 file changed, 57 insertions(+), 19 deletions(-)

diff --git a/sound/soc/intel/boards/sof_es8336.c b/sound/soc/intel/boards/sof_es8336.c
index 5e0529aa4f1d..96920d3eed8a 100644
--- a/sound/soc/intel/boards/sof_es8336.c
+++ b/sound/soc/intel/boards/sof_es8336.c
@@ -30,6 +30,7 @@
 #define SOF_ES8336_TGL_GPIO_QUIRK		BIT(4)
 #define SOF_ES8336_ENABLE_DMIC			BIT(5)
 #define SOF_ES8336_JD_INVERTED			BIT(6)
+#define SOF_ES8336_HEADPHONE_GPIO		BIT(7)
 
 static unsigned long quirk;
 
@@ -39,10 +40,9 @@ MODULE_PARM_DESC(quirk, "Board-specific quirk override");
 
 struct sof_es8336_private {
 	struct device *codec_dev;
-	struct gpio_desc *gpio_pa;
+	struct gpio_desc *gpio_pa, *gpio_pa_headphone;
 	struct snd_soc_jack jack;
 	struct list_head hdmi_pcm_list;
-	bool speaker_en;
 };
 
 struct sof_hdmi_pcm {
@@ -51,15 +51,28 @@ struct sof_hdmi_pcm {
 	int device;
 };
 
-static const struct acpi_gpio_params pa_enable_gpio = { 0, 0, true };
+static const struct acpi_gpio_params pa_enable_gpio0 = { 0, 0, true };
+static const struct acpi_gpio_params pa_enable_gpio1 = { 1, 0, true };
+
 static const struct acpi_gpio_mapping acpi_es8336_gpios[] = {
-	{ "pa-enable-gpios", &pa_enable_gpio, 1 },
+	{ "pa-enable-gpios", &pa_enable_gpio0, 1 },
 	{ }
 };
 
-static const struct acpi_gpio_params quirk_pa_enable_gpio = { 1, 0, true };
 static const struct acpi_gpio_mapping quirk_acpi_es8336_gpios[] = {
-	{ "pa-enable-gpios", &quirk_pa_enable_gpio, 1 },
+	{ "pa-enable-gpios", &pa_enable_gpio1, 1 },
+	{ }
+};
+
+static const struct acpi_gpio_mapping quirk_acpi_headphone_es8336_gpios[] = {
+	{ "pa-enable-gpios", &pa_enable_gpio0, 1 },
+	{ "pa-enable-headphone-gpios", &pa_enable_gpio1, 1 },
+	{ }
+};
+
+static const struct acpi_gpio_mapping quirk_tgl_acpi_headphone_es8336_gpios[] = {
+	{ "pa-enable-gpios", &pa_enable_gpio1, 1 },
+	{ "pa-enable-headphone-gpios", &pa_enable_gpio0, 1 },
 	{ }
 };
 
@@ -71,6 +84,8 @@ static void log_quirks(struct device *dev)
 	dev_info(dev, "quirk SSP%ld\n",  SOF_ES8336_SSP_CODEC(quirk));
 	if (quirk & SOF_ES8336_ENABLE_DMIC)
 		dev_info(dev, "quirk DMIC enabled\n");
+	if (quirk & SOF_ES8336_HEADPHONE_GPIO)
+		dev_info(dev, "quirk headphone GPIO enabled\n");
 	if (quirk & SOF_ES8336_TGL_GPIO_QUIRK)
 		dev_info(dev, "quirk TGL GPIO enabled\n");
 	if (quirk & SOF_ES8336_JD_INVERTED)
@@ -84,24 +99,35 @@ static int sof_es8316_speaker_power_event(struct snd_soc_dapm_widget *w,
 	struct sof_es8336_private *priv = snd_soc_card_get_drvdata(card);
 
 	if (SND_SOC_DAPM_EVENT_ON(event))
-		priv->speaker_en = false;
-	else
-		priv->speaker_en = true;
+		msleep(70);
 
-	gpiod_set_value_cansleep(priv->gpio_pa, priv->speaker_en);
+	gpiod_set_value_cansleep(priv->gpio_pa, !SND_SOC_DAPM_EVENT_ON(event));
+
+	return 0;
+}
+
+static int sof_es8316_headphone_power_event(struct snd_soc_dapm_widget *w,
+					  struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_card *card = w->dapm->card;
+	struct sof_es8336_private *priv = snd_soc_card_get_drvdata(card);
+
+	if (!(quirk & SOF_ES8336_HEADPHONE_GPIO))
+		return 0;
+
+	if (SND_SOC_DAPM_EVENT_ON(event))
+		msleep(70);
+
+	gpiod_set_value_cansleep(priv->gpio_pa_headphone, SND_SOC_DAPM_EVENT_ON(event));
 
 	return 0;
 }
 
 static const struct snd_soc_dapm_widget sof_es8316_widgets[] = {
-	SND_SOC_DAPM_SPK("Speaker", NULL),
-	SND_SOC_DAPM_HP("Headphone", NULL),
+	SND_SOC_DAPM_SPK("Speaker", sof_es8316_speaker_power_event),
+	SND_SOC_DAPM_HP("Headphone", sof_es8316_headphone_power_event),
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
 	SND_SOC_DAPM_MIC("Internal Mic", NULL),
-
-	SND_SOC_DAPM_SUPPLY("Speaker Power", SND_SOC_NOPM, 0, 0,
-			    sof_es8316_speaker_power_event,
-			    SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMU),
 };
 
 static const struct snd_soc_dapm_widget dmic_widgets[] = {
@@ -114,11 +140,10 @@ static const struct snd_soc_dapm_route sof_es8316_audio_map[] = {
 
 	/*
 	 * There is no separate speaker output instead the speakers are muxed to
-	 * the HP outputs. The mux is controlled by the "Speaker Power" supply.
+	 * the HP outputs. The mux is controlled Speaker and/or headphone switch.
 	 */
 	{"Speaker", NULL, "HPOL"},
 	{"Speaker", NULL, "HPOR"},
-	{"Speaker", NULL, "Speaker Power"},
 };
 
 static const struct snd_soc_dapm_route sof_es8316_intmic_in1_map[] = {
@@ -233,8 +258,14 @@ static int sof_es8336_quirk_cb(const struct dmi_system_id *id)
 {
 	quirk = (unsigned long)id->driver_data;
 
-	if (quirk & SOF_ES8336_TGL_GPIO_QUIRK)
+	if (quirk & SOF_ES8336_HEADPHONE_GPIO) {
+		if (quirk & SOF_ES8336_TGL_GPIO_QUIRK)
+			gpio_mapping = quirk_tgl_acpi_headphone_es8336_gpios;
+		else
+			gpio_mapping = quirk_acpi_headphone_es8336_gpios;
+	} else if (quirk & SOF_ES8336_TGL_GPIO_QUIRK) {
 		gpio_mapping = quirk_acpi_es8336_gpios;
+	}
 
 	return 1;
 }
@@ -592,6 +623,13 @@ static int sof_es8336_probe(struct platform_device *pdev)
 		goto err_put_codec;
 	}
 
+	priv->gpio_pa_headphone = gpiod_get_optional(codec_dev, "pa-enable-headphone", GPIOD_OUT_LOW);
+	if (IS_ERR(priv->gpio_pa_headphone)) {
+		ret = dev_err_probe(dev, PTR_ERR(priv->gpio_pa_headphone),
+				    "could not get pa-enable-headphone GPIO\n");
+		goto err_put_codec;
+	}
+
 	INIT_LIST_HEAD(&priv->hdmi_pcm_list);
 
 	snd_soc_card_set_drvdata(card, priv);
-- 
2.35.1