[PATCH 4/5] ASoC: Intel: bytcr_rt5640: Support retrieving the codec IRQ from the AMCR0F28 ACPI dev

[Hans de Goede]

Some X86 tablets, which ship with Android as factory installed OS,
specify codec IRQs/GPIOS in a special Android AMCR0F28 ACPI device.

Add support for retrieving the codec IRQ from this ACPI device instead
of from the 10EC5640 device describing the codec itself and enable this
on Asus MemoPad 7 ME176C tablets.

This fixes jack-detect not working on these tablets.

Cc: Stephan Gerhold <stephan at gerhold.net>
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 a0c5f0e9c22a..f37ab44ae957 100644
--- a/sound/soc/intel/boards/bytcr_rt5640.c
+++ b/sound/soc/intel/boards/bytcr_rt5640.c
@@ -79,6 +79,7 @@ enum {
 #define BYT_RT5640_LINEOUT_AS_HP2	BIT(26)
 #define BYT_RT5640_HSMIC2_ON_IN1	BIT(27)
 #define BYT_RT5640_JD_HP_ELITEP_1000G2	BIT(28)
+#define BYT_RT5640_USE_AMCR0F28		BIT(29)
 
 #define BYTCR_INPUT_DEFAULTS				\
 	(BYT_RT5640_IN3_MAP |				\
@@ -93,6 +94,7 @@ enum {
 struct byt_rt5640_private {
 	struct snd_soc_jack jack;
 	struct snd_soc_jack jack2;
+	struct rt5640_set_jack_data jack_data;
 	struct gpio_desc *hsmic_detect;
 	struct clk *mclk;
 	struct device *codec_dev;
@@ -597,7 +599,8 @@ static const struct dmi_system_id byt_rt5640_quirk_table[] = {
 					BYT_RT5640_OVCD_TH_2000UA |
 					BYT_RT5640_OVCD_SF_0P75 |
 					BYT_RT5640_SSP0_AIF1 |
-					BYT_RT5640_MCLK_EN),
+					BYT_RT5640_MCLK_EN |
+					BYT_RT5640_USE_AMCR0F28),
 	},
 	{
 		.matches = {
@@ -1109,6 +1112,32 @@ static int byt_rt5640_add_codec_device_props(struct device *i2c_dev,
 	return ret;
 }
 
+/* Some Android devs specify IRQs/GPIOS in a special AMCR0F28 ACPI device */
+static int byt_rt5640_get_amcr0f28_settings(struct snd_soc_card *card)
+{
+	struct byt_rt5640_private *priv = snd_soc_card_get_drvdata(card);
+	struct rt5640_set_jack_data *data = &priv->jack_data;
+	struct acpi_device *adev;
+	int ret = 0;
+
+	adev = acpi_dev_get_first_match_dev("AMCR0F28", "1", -1);
+	if (!adev) {
+		dev_err(card->dev, "error cannot find AMCR0F28 adev\n");
+		return -ENOENT;
+	}
+
+	data->codec_irq_override = acpi_dev_gpio_irq_get(adev, 0);
+	if (data->codec_irq_override < 0) {
+		ret = data->codec_irq_override;
+		dev_err(card->dev, "error %d getting codec IRQ\n", ret);
+		goto put_adev;
+	}
+
+put_adev:
+	acpi_dev_put(adev);
+	return ret;
+}
+
 static int byt_rt5640_init(struct snd_soc_pcm_runtime *runtime)
 {
 	struct snd_soc_card *card = runtime->card;
@@ -1244,7 +1273,14 @@ static int byt_rt5640_init(struct snd_soc_pcm_runtime *runtime)
 		}
 		snd_jack_set_key(priv->jack.jack, SND_JACK_BTN_0,
 				 KEY_PLAYPAUSE);
-		snd_soc_component_set_jack(component, &priv->jack, NULL);
+
+		if (byt_rt5640_quirk & BYT_RT5640_USE_AMCR0F28) {
+			ret = byt_rt5640_get_amcr0f28_settings(card);
+			if (ret)
+				return ret;
+		}
+
+		snd_soc_component_set_jack(component, &priv->jack, &priv->jack_data);
 	}
 
 	if (byt_rt5640_quirk & BYT_RT5640_JD_HP_ELITEP_1000G2) {
@@ -1448,7 +1484,8 @@ static int byt_rt5640_resume(struct snd_soc_card *card)
 	for_each_card_components(card, component) {
 		if (!strcmp(component->name, byt_rt5640_codec_name)) {
 			dev_dbg(component->dev, "re-enabling jack detect after resume\n");
-			snd_soc_component_set_jack(component, &priv->jack, NULL);
+			snd_soc_component_set_jack(component, &priv->jack,
+						   &priv->jack_data);
 			break;
 		}
 	}
-- 
2.33.1