[PATCH v4 0/3] Fix jack detection for Chromebook Pixel

[PATCH v4 0/3] Fix jack detection for Chromebook Pixel

[Fletcher Woodruff]

Headphone/mic jack detection doesn't work on the Chromebook Pixel 2015.

This patch changes the irq implementation to support polarity flipping
and fixes the configuration code so that correct GPIO pins are read
from ACPI.

With this series, plugging and unplugging the headphone jack switches
between headphones and speakers automatically, and headset microphones 
are also detected.

v4:
  - Fix incorrect void* cast in rt5677_irq() 

v3:
  - Update commit message for patch 1/3 to clarify why we implement
    our own irq_chip.

v2:
  - Split IRQ change into two patches: adding and fixing potential race
  - Change config reading code to try both DT and ACPI style names

Ben Zhang (1):
  ASoC: rt5677: allow multiple interrupt sources

Fletcher Woodruff (2):
  ASoC: rt5677: handle concurrent interrupts
  ASoC: rt5677: fall back to DT prop names on error

 sound/soc/codecs/rt5677.c | 346 ++++++++++++++++++++++++++------------
 sound/soc/codecs/rt5677.h |  14 +-
 2 files changed, 256 insertions(+), 104 deletions(-)

-- 
2.21.0.1020.gf2820cf01a-goog

[PATCH v4 1/3] ASoC: rt5677: allow multiple interrupt sources

[Fletcher Woodruff]

From: Ben Zhang <benzh@chromium.org>

This patch allows headphone plug detect and mic present
detect to be enabled at the same time. This patch implements
an irq_chip with irq_domain directly instead of using
regmap-irq, so that interrupt source line polarities can
be flipped to support irq sharing.

This patch does not add polarity flipping support within regmap-irq
because there is extra work that must be done within the irq handler
to support hotword detection. On the Chromebook Pixel, the firmware will
disconnect GPIO1 from the jack detection irq when a hotword is detected
and trigger the interrupt handler. Inside the handler, we will need to
detect this, report the hotword event, and re-connect GPIO1 to the jack
detection irq.

Signed-off-by: Ben Zhang <benzh@chromium.org>
Signed-off-by: Fletcher Woodruff <fletcherw@chromium.org>
---
 sound/soc/codecs/rt5677.c | 256 ++++++++++++++++++++++++++++----------
 sound/soc/codecs/rt5677.h |  14 ++-
 2 files changed, 203 insertions(+), 67 deletions(-)

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index 9b7a1833d3316c..899e07e30228a1 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -23,6 +23,10 @@
 #include <linux/firmware.h>
 #include <linux/of_device.h>
 #include <linux/property.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/workqueue.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -4620,7 +4624,6 @@ static void rt5677_gpio_config(struct rt5677_priv *rt5677, unsigned offset,
 static int rt5677_to_irq(struct gpio_chip *chip, unsigned offset)
 {
 	struct rt5677_priv *rt5677 = gpiochip_get_data(chip);
-	struct regmap_irq_chip_data *data = rt5677->irq_data;
 	int irq;
 
 	if ((rt5677->pdata.jd1_gpio == 1 && offset == RT5677_GPIO1) ||
@@ -4646,7 +4649,7 @@ static int rt5677_to_irq(struct gpio_chip *chip, unsigned offset)
 		return -ENXIO;
 	}
 
-	return regmap_irq_get_virq(data, irq);
+	return irq_create_mapping(rt5677->domain, irq);
 }
 
 static const struct gpio_chip rt5677_template_chip = {
@@ -4716,37 +4719,13 @@ static int rt5677_probe(struct snd_soc_component *component)
 
 	snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
 
-	regmap_write(rt5677->regmap, RT5677_DIG_MISC, 0x0020);
+	regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC,
+			~RT5677_IRQ_DEBOUNCE_SEL_MASK, 0x0020);
 	regmap_write(rt5677->regmap, RT5677_PWR_DSP2, 0x0c00);
 
 	for (i = 0; i < RT5677_GPIO_NUM; i++)
 		rt5677_gpio_config(rt5677, i, rt5677->pdata.gpio_config[i]);
 
-	if (rt5677->irq_data) {
-		regmap_update_bits(rt5677->regmap, RT5677_GPIO_CTRL1, 0x8000,
-			0x8000);
-		regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC, 0x0018,
-			0x0008);
-
-		if (rt5677->pdata.jd1_gpio)
-			regmap_update_bits(rt5677->regmap, RT5677_JD_CTRL1,
-				RT5677_SEL_GPIO_JD1_MASK,
-				rt5677->pdata.jd1_gpio <<
-				RT5677_SEL_GPIO_JD1_SFT);
-
-		if (rt5677->pdata.jd2_gpio)
-			regmap_update_bits(rt5677->regmap, RT5677_JD_CTRL1,
-				RT5677_SEL_GPIO_JD2_MASK,
-				rt5677->pdata.jd2_gpio <<
-				RT5677_SEL_GPIO_JD2_SFT);
-
-		if (rt5677->pdata.jd3_gpio)
-			regmap_update_bits(rt5677->regmap, RT5677_JD_CTRL1,
-				RT5677_SEL_GPIO_JD3_MASK,
-				rt5677->pdata.jd3_gpio <<
-				RT5677_SEL_GPIO_JD3_SFT);
-	}
-
 	mutex_init(&rt5677->dsp_cmd_lock);
 	mutex_init(&rt5677->dsp_pri_lock);
 
@@ -5063,65 +5042,210 @@ static void rt5677_read_device_properties(struct rt5677_priv *rt5677,
 			&rt5677->pdata.jd3_gpio);
 }
 
-static struct regmap_irq rt5677_irqs[] = {
+struct rt5677_irq_desc {
+	unsigned int enable_mask;
+	unsigned int status_mask;
+	unsigned int polarity_mask;
+};
+
+static const struct rt5677_irq_desc rt5677_irq_descs[] = {
 	[RT5677_IRQ_JD1] = {
-		.reg_offset = 0,
-		.mask = RT5677_EN_IRQ_GPIO_JD1,
+		.enable_mask = RT5677_EN_IRQ_GPIO_JD1,
+		.status_mask = RT5677_STA_GPIO_JD1,
+		.polarity_mask = RT5677_INV_GPIO_JD1,
 	},
 	[RT5677_IRQ_JD2] = {
-		.reg_offset = 0,
-		.mask = RT5677_EN_IRQ_GPIO_JD2,
+		.enable_mask = RT5677_EN_IRQ_GPIO_JD2,
+		.status_mask = RT5677_STA_GPIO_JD2,
+		.polarity_mask = RT5677_INV_GPIO_JD2,
 	},
 	[RT5677_IRQ_JD3] = {
-		.reg_offset = 0,
-		.mask = RT5677_EN_IRQ_GPIO_JD3,
+		.enable_mask = RT5677_EN_IRQ_GPIO_JD3,
+		.status_mask = RT5677_STA_GPIO_JD3,
+		.polarity_mask = RT5677_INV_GPIO_JD3,
 	},
 };
 
-static struct regmap_irq_chip rt5677_irq_chip = {
-	.name = "rt5677",
-	.irqs = rt5677_irqs,
-	.num_irqs = ARRAY_SIZE(rt5677_irqs),
+static irqreturn_t rt5677_irq(int unused, void *data)
+{
+	struct rt5677_priv *rt5677 = data;
+	int ret = 0, i, reg_irq, virq;
+	bool irq_fired;
+
+	mutex_lock(&rt5677->irq_lock);
+	/* Read interrupt status */
+	ret = regmap_read(rt5677->regmap, RT5677_IRQ_CTRL1, &reg_irq);
+	if (ret) {
+		dev_err(rt5677->component->dev,
+			"Failed to read IRQ status: %d\n",
+			ret);
+		goto exit;
+	}
+	/*
+	 * Clear the interrupt by flipping the polarity of the
+	 * interrupt source lines that just fired
+	 */
+	irq_fired = false;
+	for (i = 0; i < RT5677_IRQ_NUM; i++) {
+		if (reg_irq & rt5677_irq_descs[i].status_mask) {
+			reg_irq ^= rt5677_irq_descs[i].polarity_mask;
+			irq_fired = true;
+		}
+	}
+	if (!irq_fired)
+		goto exit;
 
-	.num_regs = 1,
-	.status_base = RT5677_IRQ_CTRL1,
-	.mask_base = RT5677_IRQ_CTRL1,
-	.mask_invert = 1,
-};
+	ret = regmap_write(rt5677->regmap, RT5677_IRQ_CTRL1, reg_irq);
+	if (ret) {
+		dev_err(rt5677->component->dev,
+			"Failed to update IRQ status: %d\n",
+			ret);
+		goto exit;
+	}
+
+	/* Process interrupts */
+	for (i = 0; i < RT5677_IRQ_NUM; i++) {
+		if ((reg_irq & rt5677_irq_descs[i].enable_mask) &&
+		    (reg_irq & rt5677_irq_descs[i].status_mask)) {
+			virq = irq_find_mapping(rt5677->domain, i);
+			if (virq)
+				handle_nested_irq(virq);
+		}
+	}
+exit:
+	mutex_unlock(&rt5677->irq_lock);
+	return IRQ_HANDLED;
+}
 
-static int rt5677_init_irq(struct i2c_client *i2c)
+static void rt5677_irq_work(struct work_struct *work)
 {
-	int ret;
-	struct rt5677_priv *rt5677 = i2c_get_clientdata(i2c);
+	struct rt5677_priv *rt5677 =
+		container_of(work, struct rt5677_priv, irq_work.work);
 
-	if (!rt5677->pdata.jd1_gpio &&
-		!rt5677->pdata.jd2_gpio &&
-		!rt5677->pdata.jd3_gpio)
-		return 0;
+	rt5677_irq(0, rt5677);
+}
 
-	if (!i2c->irq) {
-		dev_err(&i2c->dev, "No interrupt specified\n");
-		return -EINVAL;
-	}
+static void rt5677_irq_bus_lock(struct irq_data *data)
+{
+	struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
 
-	ret = regmap_add_irq_chip(rt5677->regmap, i2c->irq,
-		IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,
-		&rt5677_irq_chip, &rt5677->irq_data);
+	mutex_lock(&rt5677->irq_lock);
+}
 
-	if (ret != 0) {
-		dev_err(&i2c->dev, "Failed to register IRQ chip: %d\n", ret);
-		return ret;
-	}
+static void rt5677_irq_bus_sync_unlock(struct irq_data *data)
+{
+	struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
+
+	regmap_update_bits(rt5677->regmap, RT5677_IRQ_CTRL1,
+			RT5677_EN_IRQ_GPIO_JD1 | RT5677_EN_IRQ_GPIO_JD2 |
+			RT5677_EN_IRQ_GPIO_JD3, rt5677->irq_en);
+	mutex_unlock(&rt5677->irq_lock);
+}
 
+static void rt5677_irq_enable(struct irq_data *data)
+{
+	struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
+
+	rt5677->irq_en |= rt5677_irq_descs[data->hwirq].enable_mask;
+}
+
+static void rt5677_irq_disable(struct irq_data *data)
+{
+	struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
+
+	rt5677->irq_en &= ~rt5677_irq_descs[data->hwirq].enable_mask;
+}
+
+static struct irq_chip rt5677_irq_chip = {
+	.name			= "rt5677_irq_chip",
+	.irq_bus_lock		= rt5677_irq_bus_lock,
+	.irq_bus_sync_unlock	= rt5677_irq_bus_sync_unlock,
+	.irq_disable		= rt5677_irq_disable,
+	.irq_enable		= rt5677_irq_enable,
+};
+
+static int rt5677_irq_map(struct irq_domain *h, unsigned int virq,
+			  irq_hw_number_t hw)
+{
+	struct rt5677_priv *rt5677 = h->host_data;
+
+	irq_set_chip_data(virq, rt5677);
+	irq_set_chip(virq, &rt5677_irq_chip);
+	irq_set_nested_thread(virq, 1);
+	irq_set_noprobe(virq);
 	return 0;
 }
 
-static void rt5677_free_irq(struct i2c_client *i2c)
+
+static const struct irq_domain_ops rt5677_domain_ops = {
+	.map	= rt5677_irq_map,
+	.xlate	= irq_domain_xlate_twocell,
+};
+
+static void rt5677_init_irq(struct i2c_client *i2c)
+{
+	struct rt5677_priv *rt5677 = i2c_get_clientdata(i2c);
+	int ret;
+	unsigned int jd_mask = 0, jd_val = 0;
+
+	/* No irq has been assigned to the codec */
+	if (!i2c->irq)
+		return;
+
+	mutex_init(&rt5677->irq_lock);
+	INIT_DELAYED_WORK(&rt5677->irq_work, rt5677_irq_work);
+
+	/*
+	 * Select RC as the debounce clock so that GPIO works even when
+	 * MCLK is gated which happens when there is no audio stream
+	 * (SND_SOC_BIAS_OFF).
+	 */
+	regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC,
+			RT5677_IRQ_DEBOUNCE_SEL_MASK,
+			RT5677_IRQ_DEBOUNCE_SEL_RC);
+	/* Enable auto power on RC when GPIO states are changed */
+	regmap_update_bits(rt5677->regmap, RT5677_GEN_CTRL1, 0xff, 0xff);
+
+	/* Select and enable jack detection sources per platform data */
+	if (rt5677->pdata.jd1_gpio) {
+		jd_mask	|= RT5677_SEL_GPIO_JD1_MASK;
+		jd_val	|= rt5677->pdata.jd1_gpio << RT5677_SEL_GPIO_JD1_SFT;
+	}
+	if (rt5677->pdata.jd2_gpio) {
+		jd_mask	|= RT5677_SEL_GPIO_JD2_MASK;
+		jd_val	|= rt5677->pdata.jd2_gpio << RT5677_SEL_GPIO_JD2_SFT;
+	}
+	if (rt5677->pdata.jd3_gpio) {
+		jd_mask	|= RT5677_SEL_GPIO_JD3_MASK;
+		jd_val	|= rt5677->pdata.jd3_gpio << RT5677_SEL_GPIO_JD3_SFT;
+	}
+	regmap_update_bits(rt5677->regmap, RT5677_JD_CTRL1, jd_mask, jd_val);
+
+	/* Set GPIO1 pin to be IRQ output */
+	regmap_update_bits(rt5677->regmap, RT5677_GPIO_CTRL1,
+			RT5677_GPIO1_PIN_MASK, RT5677_GPIO1_PIN_IRQ);
+
+	/* Ready to listen for interrupts */
+	rt5677->domain = irq_domain_add_linear(i2c->dev.of_node,
+			RT5677_IRQ_NUM, &rt5677_domain_ops, rt5677);
+	if (!rt5677->domain) {
+		dev_err(&i2c->dev, "Failed to create IRQ domain\n");
+		return;
+	}
+	ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, rt5677_irq,
+			IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+			"rt5677", i2c);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to request IRQ: %d\n", ret);
+		return;
+	}
+}
+
+static void rt5677_irq_exit(struct i2c_client *i2c)
 {
 	struct rt5677_priv *rt5677 = i2c_get_clientdata(i2c);
 
-	if (rt5677->irq_data)
-		regmap_del_irq_chip(i2c->irq, rt5677->irq_data);
+	cancel_delayed_work_sync(&rt5677->irq_work);
 }
 
 static int rt5677_i2c_probe(struct i2c_client *i2c)
@@ -5259,7 +5383,7 @@ static int rt5677_i2c_probe(struct i2c_client *i2c)
 
 static int rt5677_i2c_remove(struct i2c_client *i2c)
 {
-	rt5677_free_irq(i2c);
+	rt5677_irq_exit(i2c);
 	rt5677_free_gpio(i2c);
 
 	return 0;
diff --git a/sound/soc/codecs/rt5677.h b/sound/soc/codecs/rt5677.h
index 183d92b030459f..9c73bea8635508 100644
--- a/sound/soc/codecs/rt5677.h
+++ b/sound/soc/codecs/rt5677.h
@@ -1636,6 +1636,12 @@
 #define RT5677_GPIO6_P_NOR			(0x0 << 0)
 #define RT5677_GPIO6_P_INV			(0x1 << 0)
 
+/* General Control (0xfa) */
+#define RT5677_IRQ_DEBOUNCE_SEL_MASK		(0x3 << 3)
+#define RT5677_IRQ_DEBOUNCE_SEL_MCLK		(0x0 << 3)
+#define RT5677_IRQ_DEBOUNCE_SEL_RC		(0x1 << 3)
+#define RT5677_IRQ_DEBOUNCE_SEL_SLIM		(0x2 << 3)
+
 /* Virtual DSP Mixer Control (0xf7 0xf8 0xf9) */
 #define RT5677_DSP_IB_01_H			(0x1 << 15)
 #define RT5677_DSP_IB_01_H_SFT			15
@@ -1713,6 +1719,7 @@ enum {
 	RT5677_IRQ_JD1,
 	RT5677_IRQ_JD2,
 	RT5677_IRQ_JD3,
+	RT5677_IRQ_NUM,
 };
 
 enum rt5677_type {
@@ -1811,9 +1818,14 @@ struct rt5677_priv {
 	struct gpio_chip gpio_chip;
 #endif
 	bool dsp_vad_en;
-	struct regmap_irq_chip_data *irq_data;
 	bool is_dsp_mode;
 	bool is_vref_slow;
+
+	/* Interrupt handling */
+	struct irq_domain *domain;
+	struct mutex irq_lock;
+	unsigned int irq_en;
+	struct delayed_work irq_work;
 };
 
 int rt5677_sel_asrc_clk_src(struct snd_soc_component *component,
-- 
2.21.0.1020.gf2820cf01a-goog

[PATCH v4 2/3] ASoC: rt5677: handle concurrent interrupts

[Fletcher Woodruff]

The rt5677 driver writes to the IRQ control register within the IRQ
handler in order to flip the polarity of the interrupts that have been
signalled.  If an interrupt fires in the interval between the
regmap_read and the regmap_write, it will not trigger a new call to
rt5677_irq.

Add a bounded loop to rt5677_irq that keeps checking interrupts until
none are seen, so that any interrupts that are signalled in that
interval are correctly handled.

Signed-off-by: Ben Zhang <benzh@chromium.org>
Signed-off-by: Fletcher Woodruff <fletcherw@chromium.org>
---
 sound/soc/codecs/rt5677.c | 84 +++++++++++++++++++++++----------------
 1 file changed, 50 insertions(+), 34 deletions(-)

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index 899e07e30228a1..da27cbfaec2b74 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -5069,47 +5069,63 @@ static const struct rt5677_irq_desc rt5677_irq_descs[] = {
 static irqreturn_t rt5677_irq(int unused, void *data)
 {
 	struct rt5677_priv *rt5677 = data;
-	int ret = 0, i, reg_irq, virq;
+	int ret = 0, loop, i, reg_irq, virq;
 	bool irq_fired;
 
 	mutex_lock(&rt5677->irq_lock);
-	/* Read interrupt status */
-	ret = regmap_read(rt5677->regmap, RT5677_IRQ_CTRL1, &reg_irq);
-	if (ret) {
-		dev_err(rt5677->component->dev,
-			"Failed to read IRQ status: %d\n",
-			ret);
-		goto exit;
-	}
 	/*
-	 * Clear the interrupt by flipping the polarity of the
-	 * interrupt source lines that just fired
+	 * Loop to handle interrupts until the last i2c read shows no pending
+	 * irqs. The interrupt line is shared by multiple interrupt sources.
+	 * After the regmap_read() below, a new interrupt source line may
+	 * become high before the regmap_write() finishes, so there isn't a
+	 * rising edge on the shared interrupt line for the new interrupt. Thus,
+	 * the loop is needed to avoid missing irqs.
+	 *
+	 * A safeguard of 20 loops is used to avoid hanging in the irq handler
+	 * if there is something wrong with the interrupt status update. The
+	 * interrupt sources here are audio jack plug/unplug events which
+	 * shouldn't happen at a high frequency for a long period of time.
+	 * Empirically, more than 3 loops have never been seen.
 	 */
-	irq_fired = false;
-	for (i = 0; i < RT5677_IRQ_NUM; i++) {
-		if (reg_irq & rt5677_irq_descs[i].status_mask) {
-			reg_irq ^= rt5677_irq_descs[i].polarity_mask;
-			irq_fired = true;
+	for (loop = 0; loop < 20; loop++) {
+		/* Read interrupt status */
+		ret = regmap_read(rt5677->regmap, RT5677_IRQ_CTRL1, &reg_irq);
+		if (ret) {
+			dev_err(rt5677->component->dev,
+				"Failed to read IRQ status: %d\n",
+				ret);
+			goto exit;
+		}
+		/*
+		 * Clear the interrupt by flipping the polarity of the
+		 * interrupt source lines that just fired
+		 */
+		irq_fired = false;
+		for (i = 0; i < RT5677_IRQ_NUM; i++) {
+			if (reg_irq & rt5677_irq_descs[i].status_mask) {
+				reg_irq ^= rt5677_irq_descs[i].polarity_mask;
+				irq_fired = true;
+			}
+		}
+		if (!irq_fired)
+			goto exit;
+
+		ret = regmap_write(rt5677->regmap, RT5677_IRQ_CTRL1, reg_irq);
+		if (ret) {
+			dev_err(rt5677->component->dev,
+				"Failed to update IRQ status: %d\n",
+				ret);
+			goto exit;
 		}
-	}
-	if (!irq_fired)
-		goto exit;
-
-	ret = regmap_write(rt5677->regmap, RT5677_IRQ_CTRL1, reg_irq);
-	if (ret) {
-		dev_err(rt5677->component->dev,
-			"Failed to update IRQ status: %d\n",
-			ret);
-		goto exit;
-	}
 
-	/* Process interrupts */
-	for (i = 0; i < RT5677_IRQ_NUM; i++) {
-		if ((reg_irq & rt5677_irq_descs[i].enable_mask) &&
-		    (reg_irq & rt5677_irq_descs[i].status_mask)) {
-			virq = irq_find_mapping(rt5677->domain, i);
-			if (virq)
-				handle_nested_irq(virq);
+		/* Process interrupts */
+		for (i = 0; i < RT5677_IRQ_NUM; i++) {
+			if ((reg_irq & rt5677_irq_descs[i].enable_mask) &&
+			    (reg_irq & rt5677_irq_descs[i].status_mask)) {
+				virq = irq_find_mapping(rt5677->domain, i);
+				if (virq)
+					handle_nested_irq(virq);
+			}
 		}
 	}
 exit:
-- 
2.21.0.1020.gf2820cf01a-goog

[PATCH v4 3/3] ASoC: rt5677: fall back to DT prop names on error

[Fletcher Woodruff]

The rt5677 driver uses ACPI-style property names to read from the
device API. However, these do not match the property names in _DSD
used on the Chromebook Pixel 2015, which are closer to the Device Tree
style.  Unify the two functions for reading from the device API so that
they try ACPI-style names first and fall back to the DT names on error.

With this patch, plugging and unplugging the headphone jack switches
between headphones and speakers automatically.

Signed-off-by: Fletcher Woodruff <fletcherw@chromium.org>
---
 sound/soc/codecs/rt5677.c | 74 +++++++++++++++++++--------------------
 1 file changed, 37 insertions(+), 37 deletions(-)

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index da27cbfaec2b74..e6b75f52d4a433 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -4998,48 +4998,50 @@ static const struct acpi_device_id rt5677_acpi_match[] = {
 };
 MODULE_DEVICE_TABLE(acpi, rt5677_acpi_match);
 
-static void rt5677_read_acpi_properties(struct rt5677_priv *rt5677,
+static void rt5677_read_device_properties(struct rt5677_priv *rt5677,
 		struct device *dev)
 {
 	u32 val;
 
-	if (!device_property_read_u32(dev, "DCLK", &val))
-		rt5677->pdata.dmic2_clk_pin = val;
+	rt5677->pdata.in1_diff =
+		device_property_read_bool(dev, "IN1") ||
+		device_property_read_bool(dev, "realtek,in1-differential");
 
-	rt5677->pdata.in1_diff = device_property_read_bool(dev, "IN1");
-	rt5677->pdata.in2_diff = device_property_read_bool(dev, "IN2");
-	rt5677->pdata.lout1_diff = device_property_read_bool(dev, "OUT1");
-	rt5677->pdata.lout2_diff = device_property_read_bool(dev, "OUT2");
-	rt5677->pdata.lout3_diff = device_property_read_bool(dev, "OUT3");
+	rt5677->pdata.in2_diff =
+		device_property_read_bool(dev, "IN2") ||
+		device_property_read_bool(dev, "realtek,in2-differential");
 
-	device_property_read_u32(dev, "JD1", &rt5677->pdata.jd1_gpio);
-	device_property_read_u32(dev, "JD2", &rt5677->pdata.jd2_gpio);
-	device_property_read_u32(dev, "JD3", &rt5677->pdata.jd3_gpio);
-}
+	rt5677->pdata.lout1_diff =
+		device_property_read_bool(dev, "OUT1") ||
+		device_property_read_bool(dev, "realtek,lout1-differential");
 
-static void rt5677_read_device_properties(struct rt5677_priv *rt5677,
-		struct device *dev)
-{
-	rt5677->pdata.in1_diff = device_property_read_bool(dev,
-			"realtek,in1-differential");
-	rt5677->pdata.in2_diff = device_property_read_bool(dev,
-			"realtek,in2-differential");
-	rt5677->pdata.lout1_diff = device_property_read_bool(dev,
-			"realtek,lout1-differential");
-	rt5677->pdata.lout2_diff = device_property_read_bool(dev,
-			"realtek,lout2-differential");
-	rt5677->pdata.lout3_diff = device_property_read_bool(dev,
-			"realtek,lout3-differential");
+	rt5677->pdata.lout2_diff =
+		device_property_read_bool(dev, "OUT2") ||
+		device_property_read_bool(dev, "realtek,lout2-differential");
+
+	rt5677->pdata.lout3_diff =
+		device_property_read_bool(dev, "OUT3") ||
+		device_property_read_bool(dev, "realtek,lout3-differential");
 
 	device_property_read_u8_array(dev, "realtek,gpio-config",
-			rt5677->pdata.gpio_config, RT5677_GPIO_NUM);
-
-	device_property_read_u32(dev, "realtek,jd1-gpio",
-			&rt5677->pdata.jd1_gpio);
-	device_property_read_u32(dev, "realtek,jd2-gpio",
-			&rt5677->pdata.jd2_gpio);
-	device_property_read_u32(dev, "realtek,jd3-gpio",
-			&rt5677->pdata.jd3_gpio);
+				      rt5677->pdata.gpio_config,
+				      RT5677_GPIO_NUM);
+
+	if (!device_property_read_u32(dev, "DCLK", &val) ||
+	    !device_property_read_u32(dev, "realtek,dmic2_clk_pin", &val))
+		rt5677->pdata.dmic2_clk_pin = val;
+
+	if (!device_property_read_u32(dev, "JD1", &val) ||
+	    !device_property_read_u32(dev, "realtek,jd1-gpio", &val))
+		rt5677->pdata.jd1_gpio = val;
+
+	if (!device_property_read_u32(dev, "JD2", &val) ||
+	    !device_property_read_u32(dev, "realtek,jd2-gpio", &val))
+		rt5677->pdata.jd2_gpio = val;
+
+	if (!device_property_read_u32(dev, "JD3", &val) ||
+	    !device_property_read_u32(dev, "realtek,jd3-gpio", &val))
+		rt5677->pdata.jd3_gpio = val;
 }
 
 struct rt5677_irq_desc {
@@ -5283,20 +5285,18 @@ static int rt5677_i2c_probe(struct i2c_client *i2c)
 		match_id = of_match_device(rt5677_of_match, &i2c->dev);
 		if (match_id)
 			rt5677->type = (enum rt5677_type)match_id->data;
-
-		rt5677_read_device_properties(rt5677, &i2c->dev);
 	} else if (ACPI_HANDLE(&i2c->dev)) {
 		const struct acpi_device_id *acpi_id;
 
 		acpi_id = acpi_match_device(rt5677_acpi_match, &i2c->dev);
 		if (acpi_id)
 			rt5677->type = (enum rt5677_type)acpi_id->driver_data;
-
-		rt5677_read_acpi_properties(rt5677, &i2c->dev);
 	} else {
 		return -EINVAL;
 	}
 
+	rt5677_read_device_properties(rt5677, &i2c->dev);
+
 	/* pow-ldo2 and reset are optional. The codec pins may be statically
 	 * connected on the board without gpios. If the gpio device property
 	 * isn't specified, devm_gpiod_get_optional returns NULL.
-- 
2.21.0.1020.gf2820cf01a-goog

Re: [alsa-devel] [PATCH v4 1/3] ASoC: rt5677: allow multiple interrupt sources

[Curtis Malainey]

On Fri, May 3, 2019 at 4:10 PM Fletcher Woodruff <fletcherw@chromium.org> wrote:
>
> From: Ben Zhang <benzh@chromium.org>
>
> This patch allows headphone plug detect and mic present
> detect to be enabled at the same time. This patch implements
> an irq_chip with irq_domain directly instead of using
> regmap-irq, so that interrupt source line polarities can
> be flipped to support irq sharing.
>
> This patch does not add polarity flipping support within regmap-irq
> because there is extra work that must be done within the irq handler
> to support hotword detection. On the Chromebook Pixel, the firmware will
> disconnect GPIO1 from the jack detection irq when a hotword is detected
> and trigger the interrupt handler. Inside the handler, we will need to
> detect this, report the hotword event, and re-connect GPIO1 to the jack
> detection irq.
>
> Signed-off-by: Ben Zhang <benzh@chromium.org>
> Signed-off-by: Fletcher Woodruff <fletcherw@chromium.org>
> ---
>  sound/soc/codecs/rt5677.c | 256 ++++++++++++++++++++++++++++----------
>  sound/soc/codecs/rt5677.h |  14 ++-
>  2 files changed, 203 insertions(+), 67 deletions(-)
>
> diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
> index 9b7a1833d3316c..899e07e30228a1 100644
> --- a/sound/soc/codecs/rt5677.c
> +++ b/sound/soc/codecs/rt5677.c
> @@ -23,6 +23,10 @@
>  #include <linux/firmware.h>
>  #include <linux/of_device.h>
>  #include <linux/property.h>
> +#include <linux/irq.h>
> +#include <linux/interrupt.h>
> +#include <linux/irqdomain.h>
> +#include <linux/workqueue.h>
>  #include <sound/core.h>
>  #include <sound/pcm.h>
>  #include <sound/pcm_params.h>
> @@ -4620,7 +4624,6 @@ static void rt5677_gpio_config(struct rt5677_priv *rt5677, unsigned offset,
>  static int rt5677_to_irq(struct gpio_chip *chip, unsigned offset)
>  {
>         struct rt5677_priv *rt5677 = gpiochip_get_data(chip);
> -       struct regmap_irq_chip_data *data = rt5677->irq_data;
>         int irq;
>
>         if ((rt5677->pdata.jd1_gpio == 1 && offset == RT5677_GPIO1) ||
> @@ -4646,7 +4649,7 @@ static int rt5677_to_irq(struct gpio_chip *chip, unsigned offset)
>                 return -ENXIO;
>         }
>
> -       return regmap_irq_get_virq(data, irq);
> +       return irq_create_mapping(rt5677->domain, irq);
>  }
>
>  static const struct gpio_chip rt5677_template_chip = {
> @@ -4716,37 +4719,13 @@ static int rt5677_probe(struct snd_soc_component *component)
>
>         snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
>
> -       regmap_write(rt5677->regmap, RT5677_DIG_MISC, 0x0020);
> +       regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC,
> +                       ~RT5677_IRQ_DEBOUNCE_SEL_MASK, 0x0020);
>         regmap_write(rt5677->regmap, RT5677_PWR_DSP2, 0x0c00);
>
>         for (i = 0; i < RT5677_GPIO_NUM; i++)
>                 rt5677_gpio_config(rt5677, i, rt5677->pdata.gpio_config[i]);
>
> -       if (rt5677->irq_data) {
> -               regmap_update_bits(rt5677->regmap, RT5677_GPIO_CTRL1, 0x8000,
> -                       0x8000);
> -               regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC, 0x0018,
> -                       0x0008);
> -
> -               if (rt5677->pdata.jd1_gpio)
> -                       regmap_update_bits(rt5677->regmap, RT5677_JD_CTRL1,
> -                               RT5677_SEL_GPIO_JD1_MASK,
> -                               rt5677->pdata.jd1_gpio <<
> -                               RT5677_SEL_GPIO_JD1_SFT);
> -
> -               if (rt5677->pdata.jd2_gpio)
> -                       regmap_update_bits(rt5677->regmap, RT5677_JD_CTRL1,
> -                               RT5677_SEL_GPIO_JD2_MASK,
> -                               rt5677->pdata.jd2_gpio <<
> -                               RT5677_SEL_GPIO_JD2_SFT);
> -
> -               if (rt5677->pdata.jd3_gpio)
> -                       regmap_update_bits(rt5677->regmap, RT5677_JD_CTRL1,
> -                               RT5677_SEL_GPIO_JD3_MASK,
> -                               rt5677->pdata.jd3_gpio <<
> -                               RT5677_SEL_GPIO_JD3_SFT);
> -       }
> -
>         mutex_init(&rt5677->dsp_cmd_lock);
>         mutex_init(&rt5677->dsp_pri_lock);
>
> @@ -5063,65 +5042,210 @@ static void rt5677_read_device_properties(struct rt5677_priv *rt5677,
>                         &rt5677->pdata.jd3_gpio);
>  }
>
> -static struct regmap_irq rt5677_irqs[] = {
> +struct rt5677_irq_desc {
> +       unsigned int enable_mask;
> +       unsigned int status_mask;
> +       unsigned int polarity_mask;
> +};
> +
> +static const struct rt5677_irq_desc rt5677_irq_descs[] = {
>         [RT5677_IRQ_JD1] = {
> -               .reg_offset = 0,
> -               .mask = RT5677_EN_IRQ_GPIO_JD1,
> +               .enable_mask = RT5677_EN_IRQ_GPIO_JD1,
> +               .status_mask = RT5677_STA_GPIO_JD1,
> +               .polarity_mask = RT5677_INV_GPIO_JD1,
>         },
>         [RT5677_IRQ_JD2] = {
> -               .reg_offset = 0,
> -               .mask = RT5677_EN_IRQ_GPIO_JD2,
> +               .enable_mask = RT5677_EN_IRQ_GPIO_JD2,
> +               .status_mask = RT5677_STA_GPIO_JD2,
> +               .polarity_mask = RT5677_INV_GPIO_JD2,
>         },
>         [RT5677_IRQ_JD3] = {
> -               .reg_offset = 0,
> -               .mask = RT5677_EN_IRQ_GPIO_JD3,
> +               .enable_mask = RT5677_EN_IRQ_GPIO_JD3,
> +               .status_mask = RT5677_STA_GPIO_JD3,
> +               .polarity_mask = RT5677_INV_GPIO_JD3,
>         },
>  };
>
> -static struct regmap_irq_chip rt5677_irq_chip = {
> -       .name = "rt5677",
> -       .irqs = rt5677_irqs,
> -       .num_irqs = ARRAY_SIZE(rt5677_irqs),
> +static irqreturn_t rt5677_irq(int unused, void *data)
> +{
> +       struct rt5677_priv *rt5677 = data;
> +       int ret = 0, i, reg_irq, virq;
> +       bool irq_fired;
> +
> +       mutex_lock(&rt5677->irq_lock);
> +       /* Read interrupt status */
> +       ret = regmap_read(rt5677->regmap, RT5677_IRQ_CTRL1, &reg_irq);
> +       if (ret) {
> +               dev_err(rt5677->component->dev,
> +                       "Failed to read IRQ status: %d\n",
> +                       ret);
> +               goto exit;
> +       }
> +       /*
> +        * Clear the interrupt by flipping the polarity of the
> +        * interrupt source lines that just fired
> +        */
> +       irq_fired = false;
> +       for (i = 0; i < RT5677_IRQ_NUM; i++) {
> +               if (reg_irq & rt5677_irq_descs[i].status_mask) {
> +                       reg_irq ^= rt5677_irq_descs[i].polarity_mask;
> +                       irq_fired = true;
> +               }
> +       }
> +       if (!irq_fired)
> +               goto exit;
>
> -       .num_regs = 1,
> -       .status_base = RT5677_IRQ_CTRL1,
> -       .mask_base = RT5677_IRQ_CTRL1,
> -       .mask_invert = 1,
> -};
> +       ret = regmap_write(rt5677->regmap, RT5677_IRQ_CTRL1, reg_irq);
> +       if (ret) {
> +               dev_err(rt5677->component->dev,
> +                       "Failed to update IRQ status: %d\n",
> +                       ret);
> +               goto exit;
> +       }
> +
> +       /* Process interrupts */
> +       for (i = 0; i < RT5677_IRQ_NUM; i++) {
> +               if ((reg_irq & rt5677_irq_descs[i].enable_mask) &&
> +                   (reg_irq & rt5677_irq_descs[i].status_mask)) {
> +                       virq = irq_find_mapping(rt5677->domain, i);
> +                       if (virq)
> +                               handle_nested_irq(virq);
> +               }
> +       }
> +exit:
> +       mutex_unlock(&rt5677->irq_lock);
> +       return IRQ_HANDLED;
> +}
>
> -static int rt5677_init_irq(struct i2c_client *i2c)
> +static void rt5677_irq_work(struct work_struct *work)
>  {
> -       int ret;
> -       struct rt5677_priv *rt5677 = i2c_get_clientdata(i2c);
> +       struct rt5677_priv *rt5677 =
> +               container_of(work, struct rt5677_priv, irq_work.work);
>
> -       if (!rt5677->pdata.jd1_gpio &&
> -               !rt5677->pdata.jd2_gpio &&
> -               !rt5677->pdata.jd3_gpio)
> -               return 0;
> +       rt5677_irq(0, rt5677);
> +}
>
> -       if (!i2c->irq) {
> -               dev_err(&i2c->dev, "No interrupt specified\n");
> -               return -EINVAL;
> -       }
> +static void rt5677_irq_bus_lock(struct irq_data *data)
> +{
> +       struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
>
> -       ret = regmap_add_irq_chip(rt5677->regmap, i2c->irq,
> -               IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,
> -               &rt5677_irq_chip, &rt5677->irq_data);
> +       mutex_lock(&rt5677->irq_lock);
> +}
>
> -       if (ret != 0) {
> -               dev_err(&i2c->dev, "Failed to register IRQ chip: %d\n", ret);
> -               return ret;
> -       }
> +static void rt5677_irq_bus_sync_unlock(struct irq_data *data)
> +{
> +       struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
> +
> +       regmap_update_bits(rt5677->regmap, RT5677_IRQ_CTRL1,
> +                       RT5677_EN_IRQ_GPIO_JD1 | RT5677_EN_IRQ_GPIO_JD2 |
> +                       RT5677_EN_IRQ_GPIO_JD3, rt5677->irq_en);
> +       mutex_unlock(&rt5677->irq_lock);
> +}
>
> +static void rt5677_irq_enable(struct irq_data *data)
> +{
> +       struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
> +
> +       rt5677->irq_en |= rt5677_irq_descs[data->hwirq].enable_mask;
> +}
> +
> +static void rt5677_irq_disable(struct irq_data *data)
> +{
> +       struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
> +
> +       rt5677->irq_en &= ~rt5677_irq_descs[data->hwirq].enable_mask;
> +}
> +
> +static struct irq_chip rt5677_irq_chip = {
> +       .name                   = "rt5677_irq_chip",
> +       .irq_bus_lock           = rt5677_irq_bus_lock,
> +       .irq_bus_sync_unlock    = rt5677_irq_bus_sync_unlock,
> +       .irq_disable            = rt5677_irq_disable,
> +       .irq_enable             = rt5677_irq_enable,
> +};
> +
> +static int rt5677_irq_map(struct irq_domain *h, unsigned int virq,
> +                         irq_hw_number_t hw)
> +{
> +       struct rt5677_priv *rt5677 = h->host_data;
> +
> +       irq_set_chip_data(virq, rt5677);
> +       irq_set_chip(virq, &rt5677_irq_chip);
> +       irq_set_nested_thread(virq, 1);
> +       irq_set_noprobe(virq);
>         return 0;
>  }
>
> -static void rt5677_free_irq(struct i2c_client *i2c)
> +
> +static const struct irq_domain_ops rt5677_domain_ops = {
> +       .map    = rt5677_irq_map,
> +       .xlate  = irq_domain_xlate_twocell,
> +};
> +
> +static void rt5677_init_irq(struct i2c_client *i2c)
> +{
> +       struct rt5677_priv *rt5677 = i2c_get_clientdata(i2c);
> +       int ret;
> +       unsigned int jd_mask = 0, jd_val = 0;
> +
> +       /* No irq has been assigned to the codec */
> +       if (!i2c->irq)
> +               return;
> +
> +       mutex_init(&rt5677->irq_lock);
> +       INIT_DELAYED_WORK(&rt5677->irq_work, rt5677_irq_work);
> +
> +       /*
> +        * Select RC as the debounce clock so that GPIO works even when
> +        * MCLK is gated which happens when there is no audio stream
> +        * (SND_SOC_BIAS_OFF).
> +        */
> +       regmap_update_bits(rt5677->regmap, RT5677_DIG_MISC,
> +                       RT5677_IRQ_DEBOUNCE_SEL_MASK,
> +                       RT5677_IRQ_DEBOUNCE_SEL_RC);
> +       /* Enable auto power on RC when GPIO states are changed */
> +       regmap_update_bits(rt5677->regmap, RT5677_GEN_CTRL1, 0xff, 0xff);
> +
> +       /* Select and enable jack detection sources per platform data */
> +       if (rt5677->pdata.jd1_gpio) {
> +               jd_mask |= RT5677_SEL_GPIO_JD1_MASK;
> +               jd_val  |= rt5677->pdata.jd1_gpio << RT5677_SEL_GPIO_JD1_SFT;
> +       }
> +       if (rt5677->pdata.jd2_gpio) {
> +               jd_mask |= RT5677_SEL_GPIO_JD2_MASK;
> +               jd_val  |= rt5677->pdata.jd2_gpio << RT5677_SEL_GPIO_JD2_SFT;
> +       }
> +       if (rt5677->pdata.jd3_gpio) {
> +               jd_mask |= RT5677_SEL_GPIO_JD3_MASK;
> +               jd_val  |= rt5677->pdata.jd3_gpio << RT5677_SEL_GPIO_JD3_SFT;
> +       }
> +       regmap_update_bits(rt5677->regmap, RT5677_JD_CTRL1, jd_mask, jd_val);
> +
> +       /* Set GPIO1 pin to be IRQ output */
> +       regmap_update_bits(rt5677->regmap, RT5677_GPIO_CTRL1,
> +                       RT5677_GPIO1_PIN_MASK, RT5677_GPIO1_PIN_IRQ);
> +
> +       /* Ready to listen for interrupts */
> +       rt5677->domain = irq_domain_add_linear(i2c->dev.of_node,
> +                       RT5677_IRQ_NUM, &rt5677_domain_ops, rt5677);
> +       if (!rt5677->domain) {
> +               dev_err(&i2c->dev, "Failed to create IRQ domain\n");
> +               return;
> +       }
> +       ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, rt5677_irq,
> +                       IRQF_TRIGGER_RISING | IRQF_ONESHOT,
> +                       "rt5677", i2c);
Something is a bit weird here, you are passing in the i2c device type
for the irq but reading out the rt5677_priv in the interrupt. This is
causing KASAN errors.

Apologies for the duplicate mail, somehow this wasn't sent originally
in plain text mode, sending again for the mailing list
> +       if (ret) {
> +               dev_err(&i2c->dev, "Failed to request IRQ: %d\n", ret);
> +               return;
> +       }
> +}
> +
> +static void rt5677_irq_exit(struct i2c_client *i2c)
>  {
>         struct rt5677_priv *rt5677 = i2c_get_clientdata(i2c);
>
> -       if (rt5677->irq_data)
> -               regmap_del_irq_chip(i2c->irq, rt5677->irq_data);
> +       cancel_delayed_work_sync(&rt5677->irq_work);
>  }
>
>  static int rt5677_i2c_probe(struct i2c_client *i2c)
> @@ -5259,7 +5383,7 @@ static int rt5677_i2c_probe(struct i2c_client *i2c)
>
>  static int rt5677_i2c_remove(struct i2c_client *i2c)
>  {
> -       rt5677_free_irq(i2c);
> +       rt5677_irq_exit(i2c);
>         rt5677_free_gpio(i2c);
>
>         return 0;
> diff --git a/sound/soc/codecs/rt5677.h b/sound/soc/codecs/rt5677.h
> index 183d92b030459f..9c73bea8635508 100644
> --- a/sound/soc/codecs/rt5677.h
> +++ b/sound/soc/codecs/rt5677.h
> @@ -1636,6 +1636,12 @@
>  #define RT5677_GPIO6_P_NOR                     (0x0 << 0)
>  #define RT5677_GPIO6_P_INV                     (0x1 << 0)
>
> +/* General Control (0xfa) */
> +#define RT5677_IRQ_DEBOUNCE_SEL_MASK           (0x3 << 3)
> +#define RT5677_IRQ_DEBOUNCE_SEL_MCLK           (0x0 << 3)
> +#define RT5677_IRQ_DEBOUNCE_SEL_RC             (0x1 << 3)
> +#define RT5677_IRQ_DEBOUNCE_SEL_SLIM           (0x2 << 3)
> +
>  /* Virtual DSP Mixer Control (0xf7 0xf8 0xf9) */
>  #define RT5677_DSP_IB_01_H                     (0x1 << 15)
>  #define RT5677_DSP_IB_01_H_SFT                 15
> @@ -1713,6 +1719,7 @@ enum {
>         RT5677_IRQ_JD1,
>         RT5677_IRQ_JD2,
>         RT5677_IRQ_JD3,
> +       RT5677_IRQ_NUM,
>  };
>
>  enum rt5677_type {
> @@ -1811,9 +1818,14 @@ struct rt5677_priv {
>         struct gpio_chip gpio_chip;
>  #endif
>         bool dsp_vad_en;
> -       struct regmap_irq_chip_data *irq_data;
>         bool is_dsp_mode;
>         bool is_vref_slow;
> +
> +       /* Interrupt handling */
> +       struct irq_domain *domain;
> +       struct mutex irq_lock;
> +       unsigned int irq_en;
> +       struct delayed_work irq_work;
>  };
>
>  int rt5677_sel_asrc_clk_src(struct snd_soc_component *component,
> --
> 2.21.0.1020.gf2820cf01a-goog
>
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> Alsa-devel@alsa-project.org
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Re: [alsa-devel] [PATCH v4 1/3] ASoC: rt5677: allow multiple interrupt sources

[Mark Brown]

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On Tue, May 07, 2019 at 02:10:26PM -0700, Curtis Malainey wrote:
> On Fri, May 3, 2019 at 4:10 PM Fletcher Woodruff <fletcherw@chromium.org>
> wrote:
> 
> > From: Ben Zhang <benzh@chromium.org>
> >
> > This patch allows headphone plug detect and mic present
> > detect to be enabled at the same time. This patch implements
> > an irq_chip with irq_domain directly instead of using
> > regmap-irq, so that interrupt source line polarities can
> > be flipped to support irq sharing.
> >

Please delete unneeded context from mails when replying.  Doing this
makes it much easier to find your reply in the message, helping ensure
it won't be missed by people scrolling through the irrelevant quoted
material.

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