[PATCH 5/5] ASoC: Intel: bytcr_rt5640: Add support for external GPIO jack-detect

[Hans de Goede]

Some boards have the codec IRQ hooked-up as normally, so the driver can
still do things like headset vs headphones and button-press detection,
but instead of using one of the JD pins of the codec, an external GPIO
is used to report the jack-presence switch status of the jack.

Add support for boards which have this setup and which specify which
external GPIO to use in the special Android AMCR0F28 ACPI device.

And add a quirk for the Asus TF103C tablet which uses this setup.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 sound/soc/intel/boards/bytcr_rt5640.c | 43 +++++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 3 deletions(-)

diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c
index f37ab44ae957..2ace32c03ec9 100644
--- a/sound/soc/intel/boards/bytcr_rt5640.c
+++ b/sound/soc/intel/boards/bytcr_rt5640.c
@@ -40,6 +40,8 @@ enum {
 	BYT_RT5640_NO_INTERNAL_MIC_MAP,
 };
 
+#define RT5640_JD_SRC_EXT_GPIO			0x0f
+
 enum {
 	BYT_RT5640_JD_SRC_GPIO1		= (RT5640_JD_SRC_GPIO1 << 4),
 	BYT_RT5640_JD_SRC_JD1_IN4P	= (RT5640_JD_SRC_JD1_IN4P << 4),
@@ -47,6 +49,7 @@ enum {
 	BYT_RT5640_JD_SRC_GPIO2		= (RT5640_JD_SRC_GPIO2 << 4),
 	BYT_RT5640_JD_SRC_GPIO3		= (RT5640_JD_SRC_GPIO3 << 4),
 	BYT_RT5640_JD_SRC_GPIO4		= (RT5640_JD_SRC_GPIO4 << 4),
+	BYT_RT5640_JD_SRC_EXT_GPIO	= (RT5640_JD_SRC_EXT_GPIO << 4)
 };
 
 enum {
@@ -627,6 +630,19 @@ static const struct dmi_system_id byt_rt5640_quirk_table[] = {
 					BYT_RT5640_SSP0_AIF2 |
 					BYT_RT5640_MCLK_EN),
 	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
+		},
+		.driver_data = (void *)(BYT_RT5640_IN1_MAP |
+					BYT_RT5640_JD_SRC_EXT_GPIO |
+					BYT_RT5640_OVCD_TH_2000UA |
+					BYT_RT5640_OVCD_SF_0P75 |
+					BYT_RT5640_SSP0_AIF1 |
+					BYT_RT5640_MCLK_EN |
+					BYT_RT5640_USE_AMCR0F28),
+	},
 	{	/* Chuwi Vi8 (CWI506) */
 		.matches = {
 			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Insyde"),
@@ -1083,9 +1099,11 @@ static int byt_rt5640_add_codec_device_props(struct device *i2c_dev,
 	}
 
 	if (BYT_RT5640_JDSRC(byt_rt5640_quirk)) {
-		props[cnt++] = PROPERTY_ENTRY_U32(
-				    "realtek,jack-detect-source",
-				    BYT_RT5640_JDSRC(byt_rt5640_quirk));
+		if (BYT_RT5640_JDSRC(byt_rt5640_quirk) != RT5640_JD_SRC_EXT_GPIO) {
+			props[cnt++] = PROPERTY_ENTRY_U32(
+					    "realtek,jack-detect-source",
+					    BYT_RT5640_JDSRC(byt_rt5640_quirk));
+		}
 
 		props[cnt++] = PROPERTY_ENTRY_U32(
 				    "realtek,over-current-threshold-microamp",
@@ -1113,6 +1131,13 @@ static int byt_rt5640_add_codec_device_props(struct device *i2c_dev,
 }
 
 /* Some Android devs specify IRQs/GPIOS in a special AMCR0F28 ACPI device */
+static const struct acpi_gpio_params amcr0f28_jd_gpio = { 1, 0, false };
+
+static const struct acpi_gpio_mapping amcr0f28_gpios[] = {
+	{ "rt5640-jd-gpios", &amcr0f28_jd_gpio, 1 },
+	{ }
+};
+
 static int byt_rt5640_get_amcr0f28_settings(struct snd_soc_card *card)
 {
 	struct byt_rt5640_private *priv = snd_soc_card_get_drvdata(card);
@@ -1133,6 +1158,18 @@ static int byt_rt5640_get_amcr0f28_settings(struct snd_soc_card *card)
 		goto put_adev;
 	}
 
+	if (BYT_RT5640_JDSRC(byt_rt5640_quirk) == RT5640_JD_SRC_EXT_GPIO) {
+		acpi_dev_add_driver_gpios(adev, amcr0f28_gpios);
+		data->jd_gpio = devm_fwnode_gpiod_get(card->dev, acpi_fwnode_handle(adev),
+						      "rt5640-jd", GPIOD_IN, "rt5640-jd");
+		acpi_dev_remove_driver_gpios(adev);
+
+		if (IS_ERR(data->jd_gpio)) {
+			ret = PTR_ERR(data->jd_gpio);
+			dev_err(card->dev, "error %d getting jd GPIO\n", ret);
+		}
+	}
+
 put_adev:
 	acpi_dev_put(adev);
 	return ret;
-- 
2.33.1