[PATCH v3 00/10] Add Headphone Detection to TLV320AIC31xx Driver

[PATCH v3 00/10] Add Headphone Detection to TLV320AIC31xx Driver

[Andrew F. Davis]

Hello all,

This series has the end goal of adding headphone detection to
the tlv320aic31xx driver. The first few patches are mostly cleanups.
Then a couple bug fixes I noticed. Followed by adding interrupt
handling and finally headphone detection.

Still not sure if the IRQ patch is correct, I think we have no good
way to share this IRQ line, so leaving it the way it is for now.

Thanks,
Andrew

Changes from v2:
 - Rebased on -next
 - Added delta patch for GPIO header fix
 - Split platform data remove into fwnode and pdata removal
 - Rework reset patch to print error code
 - Use snd_soc_codec_set_jack to set jack

Changes from v1:
 - Splitup the cleanup patch a bit more
 - Move the GPIO1 register fix patch before header cleanup
   so it can be taken back into stable
 - Added Acked-by
 - New patch dealing with regulator notifications
 - Various small touchups
 - Rebased on v4.15-rc1

Andrew F. Davis (10):
  ASoC: tlv320aic31xx: Fix GPIO header includes
  ASoC: tlv320aic31xx: Use fwnode APIs over raw OF calls
  ASoC: tlv320aic31xx: Remove platform data
  ASoC: tlv320aic31xx: Add MICBIAS off setting
  ASoC: tlv320aic31xx: Remove regulator notification handling
  ASoC: tlv320aic31xx: Reset registers during power up
  ASoC: tlv320aic31xx: Add short circuit detection support
  ASoC: tlv320aic31xx: Add overflow detection support
  ASoC: tlv320aic31xx: Add headphone/headset detection
  ASoC: tlv320aic31xx: Add button press detection

 .../devicetree/bindings/sound/tlv320aic31xx.txt    |   1 +
 include/dt-bindings/sound/tlv320aic31xx-micbias.h  |   1 +
 sound/soc/codecs/tlv320aic31xx.c                   | 263 +++++++++++++--------
 sound/soc/codecs/tlv320aic31xx.h                   |  41 +++-
 4 files changed, 196 insertions(+), 110 deletions(-)

-- 
2.15.0

[PATCH v3 01/10] ASoC: tlv320aic31xx: Fix GPIO header includes

[Andrew F. Davis]

Use of gpiod_* needs <linux/gpio/consumer.h>, add this here.

Fixes: b6b247cd5e37 ("ASoC: tlv320aic31xx: Switch GPIO handling to use gpiod_* API")
Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 38fd6ea275fb..13471a900085 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -18,7 +18,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>
 #include <linux/acpi.h>
 #include <linux/of.h>
-- 
2.15.0

[PATCH v3 02/10] ASoC: tlv320aic31xx: Use fwnode APIs over raw OF calls

[Andrew F. Davis]

Use fwnode_* API instead of of_*, the results are the same but
fwnode_* is cleaner and we get ACPI support.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 77 +++++++++++++++-------------------------
 1 file changed, 29 insertions(+), 48 deletions(-)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 13471a900085..655c99db2426 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -157,7 +157,9 @@ struct aic31xx_priv {
 	u8 i2c_regs_status;
 	struct device *dev;
 	struct regmap *regmap;
+	enum aic31xx_type codec_type;
 	struct gpio_desc *gpio_reset;
+	int micbias_vg;
 	struct aic31xx_pdata pdata;
 	struct regulator_bulk_data supplies[AIC31XX_NUM_SUPPLIES];
 	struct aic31xx_disable_nb disable_nb[AIC31XX_NUM_SUPPLIES];
@@ -450,7 +452,7 @@ static int mic_bias_event(struct snd_soc_dapm_widget *w,
 		/* change mic bias voltage to user defined */
 		snd_soc_update_bits(codec, AIC31XX_MICBIAS,
 				    AIC31XX_MICBIAS_MASK,
-				    aic31xx->pdata.micbias_vg <<
+				    aic31xx->micbias_vg <<
 				    AIC31XX_MICBIAS_SHIFT);
 		dev_dbg(codec->dev, "%s: turned on\n", __func__);
 		break;
@@ -673,14 +675,14 @@ static int aic31xx_add_controls(struct snd_soc_codec *codec)
 	int ret = 0;
 	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
 
-	if (!(aic31xx->pdata.codec_type & DAC31XX_BIT))
+	if (!(aic31xx->codec_type & DAC31XX_BIT))
 		ret = snd_soc_add_codec_controls(
 			codec, aic31xx_snd_controls,
 			ARRAY_SIZE(aic31xx_snd_controls));
 	if (ret)
 		return ret;
 
-	if (aic31xx->pdata.codec_type & AIC31XX_STEREO_CLASS_D_BIT)
+	if (aic31xx->codec_type & AIC31XX_STEREO_CLASS_D_BIT)
 		ret = snd_soc_add_codec_controls(
 			codec, aic311x_snd_controls,
 			ARRAY_SIZE(aic311x_snd_controls));
@@ -698,7 +700,7 @@ static int aic31xx_add_widgets(struct snd_soc_codec *codec)
 	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
 	int ret = 0;
 
-	if (aic31xx->pdata.codec_type & DAC31XX_BIT) {
+	if (aic31xx->codec_type & DAC31XX_BIT) {
 		ret = snd_soc_dapm_new_controls(
 			dapm, dac31xx_dapm_widgets,
 			ARRAY_SIZE(dac31xx_dapm_widgets));
@@ -722,7 +724,7 @@ static int aic31xx_add_widgets(struct snd_soc_codec *codec)
 			return ret;
 	}
 
-	if (aic31xx->pdata.codec_type & AIC31XX_STEREO_CLASS_D_BIT) {
+	if (aic31xx->codec_type & AIC31XX_STEREO_CLASS_D_BIT) {
 		ret = snd_soc_dapm_new_controls(
 			dapm, aic311x_dapm_widgets,
 			ARRAY_SIZE(aic311x_dapm_widgets));
@@ -1279,42 +1281,6 @@ static const struct of_device_id tlv320aic31xx_of_match[] = {
 	{},
 };
 MODULE_DEVICE_TABLE(of, tlv320aic31xx_of_match);
-
-static void aic31xx_pdata_from_of(struct aic31xx_priv *aic31xx)
-{
-	struct device_node *np = aic31xx->dev->of_node;
-	unsigned int value = MICBIAS_2_0V;
-	int ret;
-
-	of_property_read_u32(np, "ai31xx-micbias-vg", &value);
-	switch (value) {
-	case MICBIAS_2_0V:
-	case MICBIAS_2_5V:
-	case MICBIAS_AVDDV:
-		aic31xx->pdata.micbias_vg = value;
-		break;
-	default:
-		dev_err(aic31xx->dev,
-			"Bad ai31xx-micbias-vg value %d DT\n",
-			value);
-		aic31xx->pdata.micbias_vg = MICBIAS_2_0V;
-	}
-
-	ret = of_get_named_gpio(np, "reset-gpios", 0);
-	if (ret > 0) {
-		aic31xx->pdata.gpio_reset = ret;
-	} else {
-		ret = of_get_named_gpio(np, "gpio-reset", 0);
-		if (ret > 0) {
-			dev_warn(aic31xx->dev, "Using deprecated property \"gpio-reset\", please update your DT");
-			aic31xx->pdata.gpio_reset = ret;
-		}
-	}
-}
-#else /* CONFIG_OF */
-static void aic31xx_pdata_from_of(struct aic31xx_priv *aic31xx)
-{
-}
 #endif /* CONFIG_OF */
 
 #ifdef CONFIG_ACPI
@@ -1329,6 +1295,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 			     const struct i2c_device_id *id)
 {
 	struct aic31xx_priv *aic31xx;
+	unsigned int micbias_value = MICBIAS_2_0V;
 	int i, ret;
 
 	dev_dbg(&i2c->dev, "## %s: %s codec_type = %d\n", __func__,
@@ -1347,15 +1314,29 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 	}
 	aic31xx->dev = &i2c->dev;
 
-	aic31xx->pdata.codec_type = id->driver_data;
+	aic31xx->codec_type = id->driver_data;
 
 	dev_set_drvdata(aic31xx->dev, aic31xx);
 
-	if (dev_get_platdata(aic31xx->dev))
-		memcpy(&aic31xx->pdata, dev_get_platdata(aic31xx->dev),
-		       sizeof(aic31xx->pdata));
-	else if (aic31xx->dev->of_node)
-		aic31xx_pdata_from_of(aic31xx);
+	fwnode_property_read_u32(aic31xx->dev->fwnode, "ai31xx-micbias-vg",
+				 &micbias_value);
+	switch (micbias_value) {
+	case MICBIAS_2_0V:
+	case MICBIAS_2_5V:
+	case MICBIAS_AVDDV:
+		aic31xx->micbias_vg = micbias_value;
+		break;
+	default:
+		dev_err(aic31xx->dev, "Bad ai31xx-micbias-vg value %d\n",
+			micbias_value);
+		aic31xx->micbias_vg = MICBIAS_2_0V;
+	}
+
+	if (dev_get_platdata(aic31xx->dev)) {
+		memcpy(&aic31xx->pdata, dev_get_platdata(aic31xx->dev), sizeof(aic31xx->pdata));
+		aic31xx->codec_type = aic31xx->pdata.codec_type;
+		aic31xx->micbias_vg = aic31xx->pdata.micbias_vg;
+	}
 
 	aic31xx->gpio_reset = devm_gpiod_get_optional(aic31xx->dev, "reset",
 						      GPIOD_OUT_LOW);
@@ -1375,7 +1356,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 
-	if (aic31xx->pdata.codec_type & DAC31XX_BIT)
+	if (aic31xx->codec_type & DAC31XX_BIT)
 		return snd_soc_register_codec(&i2c->dev,
 				&soc_codec_driver_aic31xx,
 				dac31xx_dai_driver,
-- 
2.15.0

[PATCH v3 03/10] ASoC: tlv320aic31xx: Remove platform data

[Andrew F. Davis]

Platform data is not used by anyone (at least in upstream) so
drop this data.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 7 -------
 sound/soc/codecs/tlv320aic31xx.h | 6 ------
 2 files changed, 13 deletions(-)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 655c99db2426..266141d841e7 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -160,7 +160,6 @@ struct aic31xx_priv {
 	enum aic31xx_type codec_type;
 	struct gpio_desc *gpio_reset;
 	int micbias_vg;
-	struct aic31xx_pdata pdata;
 	struct regulator_bulk_data supplies[AIC31XX_NUM_SUPPLIES];
 	struct aic31xx_disable_nb disable_nb[AIC31XX_NUM_SUPPLIES];
 	unsigned int sysclk;
@@ -1332,12 +1331,6 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 		aic31xx->micbias_vg = MICBIAS_2_0V;
 	}
 
-	if (dev_get_platdata(aic31xx->dev)) {
-		memcpy(&aic31xx->pdata, dev_get_platdata(aic31xx->dev), sizeof(aic31xx->pdata));
-		aic31xx->codec_type = aic31xx->pdata.codec_type;
-		aic31xx->micbias_vg = aic31xx->pdata.micbias_vg;
-	}
-
 	aic31xx->gpio_reset = devm_gpiod_get_optional(aic31xx->dev, "reset",
 						      GPIOD_OUT_LOW);
 	if (IS_ERR(aic31xx->gpio_reset)) {
diff --git a/sound/soc/codecs/tlv320aic31xx.h b/sound/soc/codecs/tlv320aic31xx.h
index 15ac7cba86fe..ab94e6a0c742 100644
--- a/sound/soc/codecs/tlv320aic31xx.h
+++ b/sound/soc/codecs/tlv320aic31xx.h
@@ -29,12 +29,6 @@ enum aic31xx_type {
 	DAC3101 = DAC31XX_BIT | AIC31XX_STEREO_CLASS_D_BIT,
 };
 
-struct aic31xx_pdata {
-	enum aic31xx_type codec_type;
-	unsigned int gpio_reset;
-	int micbias_vg;
-};
-
 #define AIC31XX_REG(page, reg)	((page * 128) + reg)
 
 #define AIC31XX_PAGECTL		AIC31XX_REG(0, 0) /* Page Control Register */
-- 
2.15.0

[PATCH v3 04/10] ASoC: tlv320aic31xx: Add MICBIAS off setting

[Andrew F. Davis]

Leaving microphone bias off is a valid setting and even used in the DT
binding document example. Add this setting here and document the same.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/sound/tlv320aic31xx.txt | 1 +
 include/dt-bindings/sound/tlv320aic31xx-micbias.h         | 1 +
 sound/soc/codecs/tlv320aic31xx.c                          | 1 +
 3 files changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt b/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt
index 5b3c33bb99e5..411cc46a2c58 100644
--- a/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt
+++ b/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt
@@ -24,6 +24,7 @@ Optional properties:
 
 - reset-gpios - GPIO specification for the active low RESET input.
 - ai31xx-micbias-vg - MicBias Voltage setting
+        0 or MICBIAS_OFF - MICBIAS output is powered off
         1 or MICBIAS_2_0V - MICBIAS output is powered to 2.0V
         2 or MICBIAS_2_5V - MICBIAS output is powered to 2.5V
         3 or MICBIAS_AVDD - MICBIAS output is connected to AVDD
diff --git a/include/dt-bindings/sound/tlv320aic31xx-micbias.h b/include/dt-bindings/sound/tlv320aic31xx-micbias.h
index c6895a18a455..069484070fcf 100644
--- a/include/dt-bindings/sound/tlv320aic31xx-micbias.h
+++ b/include/dt-bindings/sound/tlv320aic31xx-micbias.h
@@ -2,6 +2,7 @@
 #ifndef __DT_TLV320AIC31XX_MICBIAS_H
 #define __DT_TLV320AIC31XX_MICBIAS_H
 
+#define MICBIAS_OFF		0
 #define MICBIAS_2_0V		1
 #define MICBIAS_2_5V		2
 #define MICBIAS_AVDDV		3
diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 266141d841e7..44950c1f2532 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -1320,6 +1320,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 	fwnode_property_read_u32(aic31xx->dev->fwnode, "ai31xx-micbias-vg",
 				 &micbias_value);
 	switch (micbias_value) {
+	case MICBIAS_OFF:
 	case MICBIAS_2_0V:
 	case MICBIAS_2_5V:
 	case MICBIAS_AVDDV:
-- 
2.15.0

[PATCH v3 05/10] ASoC: tlv320aic31xx: Remove regulator notification handling

[Andrew F. Davis]

A regulator being forcefully disabled is a catastrophic event that
should never happen to most devices, especially not sound CODECs.
In addition, our handler sets the reset line but never disables it
as no one is listening for an enable event, this is certainly broken
and was mosy likely just copied from other CODECs, lets just remove
this code.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 57 +---------------------------------------
 1 file changed, 1 insertion(+), 56 deletions(-)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 44950c1f2532..e2bb78188b61 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -147,11 +147,6 @@ static const char * const aic31xx_supply_names[] = {
 
 #define AIC31XX_NUM_SUPPLIES ARRAY_SIZE(aic31xx_supply_names)
 
-struct aic31xx_disable_nb {
-	struct notifier_block nb;
-	struct aic31xx_priv *aic31xx;
-};
-
 struct aic31xx_priv {
 	struct snd_soc_codec *codec;
 	u8 i2c_regs_status;
@@ -161,7 +156,6 @@ struct aic31xx_priv {
 	struct gpio_desc *gpio_reset;
 	int micbias_vg;
 	struct regulator_bulk_data supplies[AIC31XX_NUM_SUPPLIES];
-	struct aic31xx_disable_nb disable_nb[AIC31XX_NUM_SUPPLIES];
 	unsigned int sysclk;
 	u8 p_div;
 	int rate_div_line;
@@ -1032,28 +1026,6 @@ static int aic31xx_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 	return 0;
 }
 
-static int aic31xx_regulator_event(struct notifier_block *nb,
-				   unsigned long event, void *data)
-{
-	struct aic31xx_disable_nb *disable_nb =
-		container_of(nb, struct aic31xx_disable_nb, nb);
-	struct aic31xx_priv *aic31xx = disable_nb->aic31xx;
-
-	if (event & REGULATOR_EVENT_DISABLE) {
-		/*
-		 * Put codec to reset and as at least one of the
-		 * supplies was disabled.
-		 */
-		if (aic31xx->gpio_reset)
-			gpiod_set_value(aic31xx->gpio_reset, 1);
-
-		regcache_mark_dirty(aic31xx->regmap);
-		dev_dbg(aic31xx->dev, "## %s: DISABLE received\n", __func__);
-	}
-
-	return 0;
-}
-
 static void aic31xx_clk_on(struct snd_soc_codec *codec)
 {
 	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
@@ -1161,26 +1133,12 @@ static int aic31xx_set_bias_level(struct snd_soc_codec *codec,
 static int aic31xx_codec_probe(struct snd_soc_codec *codec)
 {
 	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
-	int i, ret;
+	int ret;
 
 	dev_dbg(aic31xx->dev, "## %s\n", __func__);
 
 	aic31xx->codec = codec;
 
-	for (i = 0; i < ARRAY_SIZE(aic31xx->supplies); i++) {
-		aic31xx->disable_nb[i].nb.notifier_call =
-			aic31xx_regulator_event;
-		aic31xx->disable_nb[i].aic31xx = aic31xx;
-		ret = regulator_register_notifier(aic31xx->supplies[i].consumer,
-						  &aic31xx->disable_nb[i].nb);
-		if (ret) {
-			dev_err(codec->dev,
-				"Failed to request regulator notifier: %d\n",
-				ret);
-			return ret;
-		}
-	}
-
 	regcache_cache_only(aic31xx->regmap, true);
 	regcache_mark_dirty(aic31xx->regmap);
 
@@ -1195,21 +1153,8 @@ static int aic31xx_codec_probe(struct snd_soc_codec *codec)
 	return 0;
 }
 
-static int aic31xx_codec_remove(struct snd_soc_codec *codec)
-{
-	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(aic31xx->supplies); i++)
-		regulator_unregister_notifier(aic31xx->supplies[i].consumer,
-					      &aic31xx->disable_nb[i].nb);
-
-	return 0;
-}
-
 static const struct snd_soc_codec_driver soc_codec_driver_aic31xx = {
 	.probe			= aic31xx_codec_probe,
-	.remove			= aic31xx_codec_remove,
 	.set_bias_level		= aic31xx_set_bias_level,
 	.suspend_bias_off	= true,
 
-- 
2.15.0

[PATCH v3 06/10] ASoC: tlv320aic31xx: Reset registers during power up

[Andrew F. Davis]

Add a reset function that toggles the reset line if available or uses
the software reset command otherwise. Use this in power up to ensure the
registers are in a sane state. This is useful when the driver module
is reloaded, or after Kexec, warm-reboots, etc..

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index e2bb78188b61..6cbe5820ce60 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -1026,6 +1026,22 @@ static int aic31xx_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 	return 0;
 }
 
+static int aic31xx_reset(struct aic31xx_priv *aic31xx)
+{
+	int ret = 0;
+
+	if (aic31xx->gpio_reset) {
+		gpiod_set_value(aic31xx->gpio_reset, 1);
+		ndelay(10); /* At least 10ns */
+		gpiod_set_value(aic31xx->gpio_reset, 0);
+	} else {
+		ret = regmap_write(aic31xx->regmap, AIC31XX_RESET, 1);
+	}
+	mdelay(1); /* At least 1ms */
+
+	return ret;
+}
+
 static void aic31xx_clk_on(struct snd_soc_codec *codec)
 {
 	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
@@ -1069,11 +1085,13 @@ static int aic31xx_power_on(struct snd_soc_codec *codec)
 	if (ret)
 		return ret;
 
-	if (aic31xx->gpio_reset) {
-		gpiod_set_value(aic31xx->gpio_reset, 0);
-		udelay(100);
-	}
 	regcache_cache_only(aic31xx->regmap, false);
+
+	/* Reset device registers for a consistent power-on like state */
+	ret = aic31xx_reset(aic31xx);
+	if (ret < 0)
+		dev_err(aic31xx->dev, "Could not reset device: %d\n", ret);
+
 	ret = regcache_sync(aic31xx->regmap);
 	if (ret) {
 		dev_err(codec->dev,
-- 
2.15.0

[PATCH v3 07/10] ASoC: tlv320aic31xx: Add short circuit detection support

[Andrew F. Davis]

These devices support detecting and reporting short circuits across
the output stages. Add support for reporting these issue. Do this
by registering an interrupt if available and enabling this error
to trigger that interrupt in the device.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 42 ++++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/tlv320aic31xx.h | 16 +++++++++++++++
 2 files changed, 58 insertions(+)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 6cbe5820ce60..500284853a5c 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -159,6 +159,7 @@ struct aic31xx_priv {
 	unsigned int sysclk;
 	u8 p_div;
 	int rate_div_line;
+	int irq;
 };
 
 struct aic31xx_rate_divs {
@@ -1253,6 +1254,27 @@ static const struct acpi_device_id aic31xx_acpi_match[] = {
 MODULE_DEVICE_TABLE(acpi, aic31xx_acpi_match);
 #endif
 
+static irqreturn_t aic31xx_irq(int irq, void *data)
+{
+	struct aic31xx_priv *aic31xx = data;
+	struct device *dev = aic31xx->dev;
+	unsigned int value;
+	int ret;
+
+	ret = regmap_read(aic31xx->regmap, AIC31XX_INTRDACFLAG, &value);
+	if (ret) {
+		dev_err(dev, "Failed to read interrupt mask: %d\n", ret);
+		return IRQ_NONE;
+	}
+
+	if (value & AIC31XX_HPLSCDETECT)
+		dev_err(dev, "Short circuit on Left output is detected\n");
+	if (value & AIC31XX_HPRSCDETECT)
+		dev_err(dev, "Short circuit on Right output is detected\n");
+
+	return IRQ_HANDLED;
+}
+
 static int aic31xx_i2c_probe(struct i2c_client *i2c,
 			     const struct i2c_device_id *id)
 {
@@ -1275,6 +1297,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 	aic31xx->dev = &i2c->dev;
+	aic31xx->irq = i2c->irq;
 
 	aic31xx->codec_type = id->driver_data;
 
@@ -1313,6 +1336,25 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 
+	if (aic31xx->irq > 0) {
+		regmap_update_bits(aic31xx->regmap, AIC31XX_GPIO1,
+				   AIC31XX_GPIO1_FUNC_MASK,
+				   AIC31XX_GPIO1_INT1 <<
+				   AIC31XX_GPIO1_FUNC_SHIFT);
+
+		regmap_write(aic31xx->regmap, AIC31XX_INT1CTRL,
+			     AIC31XX_SC);
+
+		ret = devm_request_threaded_irq(aic31xx->dev, aic31xx->irq,
+						NULL, aic31xx_irq,
+						IRQF_ONESHOT, "aic31xx-irq",
+						aic31xx);
+		if (ret) {
+			dev_err(aic31xx->dev, "Unable to request IRQ\n");
+			return ret;
+		}
+	}
+
 	if (aic31xx->codec_type & DAC31XX_BIT)
 		return snd_soc_register_codec(&i2c->dev,
 				&soc_codec_driver_aic31xx,
diff --git a/sound/soc/codecs/tlv320aic31xx.h b/sound/soc/codecs/tlv320aic31xx.h
index ab94e6a0c742..9dc85b6f6ad3 100644
--- a/sound/soc/codecs/tlv320aic31xx.h
+++ b/sound/soc/codecs/tlv320aic31xx.h
@@ -184,6 +184,22 @@ enum aic31xx_type {
 #define AIC31XX_SC			BIT(3)
 #define AIC31XX_ENGINE			BIT(2)
 
+/* AIC31XX_GPIO1 */
+#define AIC31XX_GPIO1_FUNC_MASK		GENMASK(5, 2)
+#define AIC31XX_GPIO1_FUNC_SHIFT	2
+#define AIC31XX_GPIO1_DISABLED		0x00
+#define AIC31XX_GPIO1_INPUT		0x01
+#define AIC31XX_GPIO1_GPI		0x02
+#define AIC31XX_GPIO1_GPO		0x03
+#define AIC31XX_GPIO1_CLKOUT		0x04
+#define AIC31XX_GPIO1_INT1		0x05
+#define AIC31XX_GPIO1_INT2		0x06
+#define AIC31XX_GPIO1_ADC_WCLK		0x07
+#define AIC31XX_GPIO1_SBCLK		0x08
+#define AIC31XX_GPIO1_SWCLK		0x09
+#define AIC31XX_GPIO1_ADC_MOD_CLK	0x10
+#define AIC31XX_GPIO1_SDOUT		0x11
+
 /* AIC31XX_DACSETUP */
 #define AIC31XX_SOFTSTEP_MASK		GENMASK(1, 0)
 
-- 
2.15.0

[PATCH v3 08/10] ASoC: tlv320aic31xx: Add overflow detection support

[Andrew F. Davis]

Similar to short circuit detection, when the ADC/DAC is saturated and
overflows poor audio quality can result and should be reported to the
user. This device support Automatic Dynamic Range Compression (DRC)
to reduce this but it is not enabled currently in this driver.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 20 +++++++++++++++++++-
 sound/soc/codecs/tlv320aic31xx.h |  7 +++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 500284853a5c..8ee407eab81b 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -1272,6 +1272,23 @@ static irqreturn_t aic31xx_irq(int irq, void *data)
 	if (value & AIC31XX_HPRSCDETECT)
 		dev_err(dev, "Short circuit on Right output is detected\n");
 
+	ret = regmap_read(aic31xx->regmap, AIC31XX_OFFLAG, &value);
+	if (ret) {
+		dev_err(dev, "Failed to read overflow flag: %d\n", ret);
+		return IRQ_NONE;
+	}
+
+	if (value & AIC31XX_DAC_OF_LEFT)
+		dev_err(dev, "Left-channel DAC overflow has occurred\n");
+	if (value & AIC31XX_DAC_OF_RIGHT)
+		dev_err(dev, "Right-channel DAC overflow has occurred\n");
+	if (value & AIC31XX_DAC_OF_SHIFTER)
+		dev_err(dev, "DAC barrel shifter overflow has occurred\n");
+	if (value & AIC31XX_ADC_OF)
+		dev_err(dev, "ADC overflow has occurred\n");
+	if (value & AIC31XX_ADC_OF_SHIFTER)
+		dev_err(dev, "ADC barrel shifter overflow has occurred\n");
+
 	return IRQ_HANDLED;
 }
 
@@ -1343,7 +1360,8 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 				   AIC31XX_GPIO1_FUNC_SHIFT);
 
 		regmap_write(aic31xx->regmap, AIC31XX_INT1CTRL,
-			     AIC31XX_SC);
+			     AIC31XX_SC |
+			     AIC31XX_ENGINE);
 
 		ret = devm_request_threaded_irq(aic31xx->dev, aic31xx->irq,
 						NULL, aic31xx_irq,
diff --git a/sound/soc/codecs/tlv320aic31xx.h b/sound/soc/codecs/tlv320aic31xx.h
index 9dc85b6f6ad3..d062663f66b5 100644
--- a/sound/soc/codecs/tlv320aic31xx.h
+++ b/sound/soc/codecs/tlv320aic31xx.h
@@ -166,6 +166,13 @@ enum aic31xx_type {
 #define AIC31XX_HPRDRVPWRSTATUS_MASK	BIT(1)
 #define AIC31XX_SPRDRVPWRSTATUS_MASK	BIT(0)
 
+/* AIC31XX_OFFLAG */
+#define AIC31XX_DAC_OF_LEFT		BIT(7)
+#define AIC31XX_DAC_OF_RIGHT		BIT(6)
+#define AIC31XX_DAC_OF_SHIFTER		BIT(5)
+#define AIC31XX_ADC_OF			BIT(3)
+#define AIC31XX_ADC_OF_SHIFTER		BIT(1)
+
 /* AIC31XX_INTRDACFLAG */
 #define AIC31XX_HPLSCDETECT		BIT(7)
 #define AIC31XX_HPRSCDETECT		BIT(6)
-- 
2.15.0

[PATCH v3 09/10] ASoC: tlv320aic31xx: Add headphone/headset detection

[Andrew F. Davis]

This device can detect the insertion/removal of headphones and headsets.
Enable reporting this status by enabling this interrupt and forwarding
this to upper-layers if a jack has been defined.

This jack definition and the resulting operation from a jack detection
event must currently be defined by sound card platform code until CODEC
outputs to jack mappings can be defined generically.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 45 ++++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/tlv320aic31xx.h | 11 ++++++++++
 2 files changed, 56 insertions(+)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 8ee407eab81b..fef402e0f9e8 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -25,6 +25,7 @@
 #include <linux/of_gpio.h>
 #include <linux/slab.h>
 #include <sound/core.h>
+#include <sound/jack.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
@@ -89,6 +90,7 @@ static bool aic31xx_volatile(struct device *dev, unsigned int reg)
 	case AIC31XX_INTRADCFLAG: /* Sticky interrupt flags */
 	case AIC31XX_INTRDACFLAG2:
 	case AIC31XX_INTRADCFLAG2:
+	case AIC31XX_HSDETECT:
 		return true;
 	}
 	return false;
@@ -156,6 +158,7 @@ struct aic31xx_priv {
 	struct gpio_desc *gpio_reset;
 	int micbias_vg;
 	struct regulator_bulk_data supplies[AIC31XX_NUM_SUPPLIES];
+	struct snd_soc_jack *jack;
 	unsigned int sysclk;
 	u8 p_div;
 	int rate_div_line;
@@ -1149,6 +1152,20 @@ static int aic31xx_set_bias_level(struct snd_soc_codec *codec,
 	return 0;
 }
 
+int aic31xx_set_jack(struct snd_soc_codec *codec,
+		     struct snd_soc_jack *jack, void *data)
+{
+	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
+
+	aic31xx->jack = jack;
+
+	/* Enable/Disable jack detection */
+	regmap_write(aic31xx->regmap, AIC31XX_HSDETECT,
+		     jack ? AIC31XX_HSD_ENABLE : 0);
+
+	return 0;
+}
+
 static int aic31xx_codec_probe(struct snd_soc_codec *codec)
 {
 	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
@@ -1174,6 +1191,7 @@ static int aic31xx_codec_probe(struct snd_soc_codec *codec)
 
 static const struct snd_soc_codec_driver soc_codec_driver_aic31xx = {
 	.probe			= aic31xx_codec_probe,
+	.set_jack		= aic31xx_set_jack,
 	.set_bias_level		= aic31xx_set_bias_level,
 	.suspend_bias_off	= true,
 
@@ -1272,6 +1290,32 @@ static irqreturn_t aic31xx_irq(int irq, void *data)
 	if (value & AIC31XX_HPRSCDETECT)
 		dev_err(dev, "Short circuit on Right output is detected\n");
 
+	if (value & AIC31XX_HSPLUG) {
+		int status = 0;
+
+		ret = regmap_read(aic31xx->regmap, AIC31XX_HSDETECT, &value);
+		if (ret) {
+			dev_err(dev, "Failed to read headset type: %d\n", ret);
+			return IRQ_NONE;
+		}
+
+		switch ((value & AIC31XX_HSD_TYPE_MASK) >>
+			AIC31XX_HSD_TYPE_SHIFT) {
+		case AIC31XX_HSD_HP:
+			status |= SND_JACK_HEADPHONE;
+			break;
+		case AIC31XX_HSD_HS:
+			status |= SND_JACK_HEADSET;
+			break;
+		default:
+			break;
+		}
+
+		if (aic31xx->jack)
+			snd_soc_jack_report(aic31xx->jack, status,
+					    AIC31XX_JACK_MASK);
+	}
+
 	ret = regmap_read(aic31xx->regmap, AIC31XX_OFFLAG, &value);
 	if (ret) {
 		dev_err(dev, "Failed to read overflow flag: %d\n", ret);
@@ -1360,6 +1404,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 				   AIC31XX_GPIO1_FUNC_SHIFT);
 
 		regmap_write(aic31xx->regmap, AIC31XX_INT1CTRL,
+			     AIC31XX_HSPLUGDET |
 			     AIC31XX_SC |
 			     AIC31XX_ENGINE);
 
diff --git a/sound/soc/codecs/tlv320aic31xx.h b/sound/soc/codecs/tlv320aic31xx.h
index d062663f66b5..66c85df4d5be 100644
--- a/sound/soc/codecs/tlv320aic31xx.h
+++ b/sound/soc/codecs/tlv320aic31xx.h
@@ -20,6 +20,9 @@
 #define AIC31XX_MINIDSP_BIT		BIT(2)
 #define DAC31XX_BIT			BIT(3)
 
+#define AIC31XX_JACK_MASK (SND_JACK_HEADPHONE | \
+			   SND_JACK_HEADSET)
+
 enum aic31xx_type {
 	AIC3100	= 0,
 	AIC3110 = AIC31XX_STEREO_CLASS_D_BIT,
@@ -213,6 +216,14 @@ enum aic31xx_type {
 /* AIC31XX_DACMUTE */
 #define AIC31XX_DACMUTE_MASK		GENMASK(3, 2)
 
+/* AIC31XX_HSDETECT */
+#define AIC31XX_HSD_ENABLE		BIT(7)
+#define AIC31XX_HSD_TYPE_MASK		GENMASK(6, 5)
+#define AIC31XX_HSD_TYPE_SHIFT		5
+#define AIC31XX_HSD_NONE		0x00
+#define AIC31XX_HSD_HP			0x01
+#define AIC31XX_HSD_HS			0x03
+
 /* AIC31XX_MICBIAS */
 #define AIC31XX_MICBIAS_MASK		GENMASK(1, 0)
 #define AIC31XX_MICBIAS_SHIFT		0
-- 
2.15.0

[PATCH v3 10/10] ASoC: tlv320aic31xx: Add button press detection

[Andrew F. Davis]

This device can optionally detect headset or microphone button presses.
Add support for this by passing this event to the jack layer.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 14 +++++++++++++-
 sound/soc/codecs/tlv320aic31xx.h |  3 ++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index fef402e0f9e8..8f5dec414628 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -1290,9 +1290,20 @@ static irqreturn_t aic31xx_irq(int irq, void *data)
 	if (value & AIC31XX_HPRSCDETECT)
 		dev_err(dev, "Short circuit on Right output is detected\n");
 
-	if (value & AIC31XX_HSPLUG) {
+	if (value & (AIC31XX_HSPLUG | AIC31XX_BUTTONPRESS)) {
 		int status = 0;
 
+		ret = regmap_read(aic31xx->regmap, AIC31XX_INTRDACFLAG2,
+				  &value);
+		if (ret) {
+			dev_err(dev, "Failed to read interrupt mask: %d\n",
+				ret);
+			return IRQ_NONE;
+		}
+
+		if (value & AIC31XX_BUTTONPRESS)
+			status |= SND_JACK_BTN_0;
+
 		ret = regmap_read(aic31xx->regmap, AIC31XX_HSDETECT, &value);
 		if (ret) {
 			dev_err(dev, "Failed to read headset type: %d\n", ret);
@@ -1405,6 +1416,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 
 		regmap_write(aic31xx->regmap, AIC31XX_INT1CTRL,
 			     AIC31XX_HSPLUGDET |
+			     AIC31XX_BUTTONPRESSDET |
 			     AIC31XX_SC |
 			     AIC31XX_ENGINE);
 
diff --git a/sound/soc/codecs/tlv320aic31xx.h b/sound/soc/codecs/tlv320aic31xx.h
index 66c85df4d5be..7fce278eadac 100644
--- a/sound/soc/codecs/tlv320aic31xx.h
+++ b/sound/soc/codecs/tlv320aic31xx.h
@@ -21,7 +21,8 @@
 #define DAC31XX_BIT			BIT(3)
 
 #define AIC31XX_JACK_MASK (SND_JACK_HEADPHONE | \
-			   SND_JACK_HEADSET)
+			   SND_JACK_HEADSET | \
+			   SND_JACK_BTN_0)
 
 enum aic31xx_type {
 	AIC3100	= 0,
-- 
2.15.0