[alsa-devel] [PATCH v6 2/4] ASoC: rt5677: move jack-detect init to i2c probe

[Fletcher Woodruff]

This patch moves the code to select the gpios for jack detection
from rt5677_probe to rt5677_init_irq (called from rt5677_i2c_probe).

It also sets some registers to fix bugs related to jack detection, and
adds some constants and comments to make it easier to understand what
certain register settings are controlling.

Signed-off-by: Ben Zhang <benzh at chromium.org>
Signed-off-by: Fletcher Woodruff <fletcherw at chromium.org>
---
 sound/soc/codecs/rt5677.c | 60 ++++++++++++++++++++++-----------------
 sound/soc/codecs/rt5677.h |  6 ++++
 2 files changed, 40 insertions(+), 26 deletions(-)

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index 63e28eaf1f40ba..b508fd9b7d4536 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -4716,37 +4716,13 @@ 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);
 
@@ -5095,6 +5071,7 @@ static int rt5677_init_irq(struct i2c_client *i2c)
 {
 	int ret;
 	struct rt5677_priv *rt5677 = i2c_get_clientdata(i2c);
+	unsigned int jd_mask = 0, jd_val = 0;
 
 	if (!rt5677->pdata.jd1_gpio &&
 		!rt5677->pdata.jd2_gpio &&
@@ -5106,6 +5083,37 @@ static int rt5677_init_irq(struct i2c_client *i2c)
 		return -EINVAL;
 	}
 
+	/*
+	 * 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);
+
 	ret = regmap_add_irq_chip(rt5677->regmap, i2c->irq,
 		IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,
 		&rt5677_irq_chip, &rt5677->irq_data);
diff --git a/sound/soc/codecs/rt5677.h b/sound/soc/codecs/rt5677.h
index 183d92b030459f..7a89bfa95dc0bf 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
-- 
2.22.0.410.gd8fdbe21b5-goog