[PATCH 0/5] max9867 driver update

[PATCH 0/5] max9867 driver update

[Ladislav Michl]

Hi Mark,

this is yet another round of driver update. Tested on AT91SAM9G20
based board with codec in master mode. All implemeted controls do
work now.

Ladislav Michl (5):
  ASoC: max9867: Fix whitespace
  ASoC: max9867: Fix power management
  ASoC: max9867: Calculate LRCLK divider
  ASoC: max9867: Fix signal paths
  ASoC: max9867: Add copyright and module author

 sound/soc/codecs/max9867.c | 479 ++++++++++++++++++-------------------
 sound/soc/codecs/max9867.h |  41 ++--
 2 files changed, 247 insertions(+), 273 deletions(-)

-- 
2.19.1

[PATCH 1/5] ASoC: max9867: Fix whitespace

[Ladislav Michl]

Minor changes to match coding style.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
---
 sound/soc/codecs/max9867.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
index 4ea3287162ad..1cda54b59854 100644
--- a/sound/soc/codecs/max9867.c
+++ b/sound/soc/codecs/max9867.c
@@ -283,13 +283,13 @@ static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 	/* Set the prescaler based on the master clock frequency*/
 	if (freq >= 10000000 && freq <= 20000000) {
 		value |= MAX9867_PSCLK_10_20;
-		max9867->pclk =  freq;
+		max9867->pclk = freq;
 	} else if (freq >= 20000000 && freq <= 40000000) {
 		value |= MAX9867_PSCLK_20_40;
-		max9867->pclk =  freq/2;
+		max9867->pclk = freq / 2;
 	} else if (freq >= 40000000 && freq <= 60000000) {
 		value |= MAX9867_PSCLK_40_60;
-		max9867->pclk =  freq/4;
+		max9867->pclk = freq / 4;
 	} else {
 		dev_err(component->dev,
 			"Invalid clock frequency %uHz (required 10-60MHz)\n",
@@ -478,8 +478,7 @@ static int max9867_i2c_probe(struct i2c_client *i2c,
 	struct max9867_priv *max9867;
 	int ret = 0, reg;
 
-	max9867 = devm_kzalloc(&i2c->dev,
-			sizeof(*max9867), GFP_KERNEL);
+	max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL);
 	if (!max9867)
 		return -ENOMEM;
 
@@ -490,8 +489,7 @@ static int max9867_i2c_probe(struct i2c_client *i2c,
 		dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
 		return ret;
 	}
-	ret = regmap_read(max9867->regmap,
-			MAX9867_REVISION, &reg);
+	ret = regmap_read(max9867->regmap, MAX9867_REVISION, &reg);
 	if (ret < 0) {
 		dev_err(&i2c->dev, "Failed to read: %d\n", ret);
 		return ret;
-- 
2.19.1

[PATCH 2/5] ASoC: max9867: Fix power management

[Ladislav Michl]

Move device enable to probe function. Doing that from prepare
callback allows only DAC to be enabled.
While here move suspend and resume functions to more common place.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
---
 sound/soc/codecs/max9867.c | 62 +++++++++++++++-----------------------
 sound/soc/codecs/max9867.h |  2 +-
 2 files changed, 26 insertions(+), 38 deletions(-)

diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
index 1cda54b59854..07a8205b211a 100644
--- a/sound/soc/codecs/max9867.c
+++ b/sound/soc/codecs/max9867.c
@@ -248,17 +248,6 @@ static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static int max9867_prepare(struct snd_pcm_substream *substream,
-			 struct snd_soc_dai *dai)
-{
-	struct snd_soc_component *component = dai->component;
-	struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
-
-	regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
-		MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
-	return 0;
-}
-
 static int max9867_mute(struct snd_soc_dai *dai, int mute)
 {
 	struct snd_soc_component *component = dai->component;
@@ -361,7 +350,6 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
 static const struct snd_soc_dai_ops max9867_dai_ops = {
 	.set_fmt = max9867_dai_set_fmt,
 	.set_sysclk	= max9867_set_dai_sysclk,
-	.prepare	= max9867_prepare,
 	.digital_mute	= max9867_mute,
 	.hw_params = max9867_dai_hw_params,
 };
@@ -392,27 +380,6 @@ static struct snd_soc_dai_driver max9867_dai[] = {
 	}
 };
 
-#ifdef CONFIG_PM_SLEEP
-static int max9867_suspend(struct device *dev)
-{
-	struct max9867_priv *max9867 = dev_get_drvdata(dev);
-
-	/* Drop down to power saving mode when system is suspended */
-	regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
-		MAX9867_SHTDOWN_MASK, ~MAX9867_SHTDOWN_MASK);
-	return 0;
-}
-
-static int max9867_resume(struct device *dev)
-{
-	struct max9867_priv *max9867 = dev_get_drvdata(dev);
-
-	regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
-		MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
-	return 0;
-}
-#endif
-
 static const struct snd_soc_component_driver max9867_component = {
 	.controls		= max9867_snd_controls,
 	.num_controls		= ARRAY_SIZE(max9867_snd_controls),
@@ -491,19 +458,40 @@ static int max9867_i2c_probe(struct i2c_client *i2c,
 	}
 	ret = regmap_read(max9867->regmap, MAX9867_REVISION, &reg);
 	if (ret < 0) {
-		dev_err(&i2c->dev, "Failed to read: %d\n", ret);
+		dev_err(&i2c->dev, "Failed to read revision: %d\n", ret);
 		return ret;
 	}
 	dev_info(&i2c->dev, "device revision: %x\n", reg);
-	ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,
-			max9867_dai, ARRAY_SIZE(max9867_dai));
+	ret = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
+				 MAX9867_SHTDOWN, MAX9867_SHTDOWN);
 	if (ret < 0) {
-		dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
+		dev_err(&i2c->dev, "Failed to enable: %d\n", ret);
 		return ret;
 	}
+	ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,
+			max9867_dai, ARRAY_SIZE(max9867_dai));
+	if (ret < 0)
+		dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
 	return ret;
 }
 
+static int __maybe_unused max9867_suspend(struct device *dev)
+{
+	struct max9867_priv *max9867 = dev_get_drvdata(dev);
+
+	/* Drop down to power saving mode when system is suspended */
+	return regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
+				  MAX9867_SHTDOWN, 0);
+}
+
+static int __maybe_unused max9867_resume(struct device *dev)
+{
+	struct max9867_priv *max9867 = dev_get_drvdata(dev);
+
+	return regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
+				  MAX9867_SHTDOWN, MAX9867_SHTDOWN);
+}
+
 static const struct i2c_device_id max9867_i2c_id[] = {
 	{ "max9867", 0 },
 	{ }
diff --git a/sound/soc/codecs/max9867.h b/sound/soc/codecs/max9867.h
index 55cd9976ff47..d9170850c96e 100644
--- a/sound/soc/codecs/max9867.h
+++ b/sound/soc/codecs/max9867.h
@@ -67,7 +67,7 @@
 #define MAX9867_MICCONFIG    0x15
 #define MAX9867_MODECONFIG   0x16
 #define MAX9867_PWRMAN       0x17
-#define MAX9867_SHTDOWN_MASK (1<<7)
+#define MAX9867_SHTDOWN      0x80
 #define MAX9867_REVISION     0xff
 
 #define MAX9867_CACHEREGNUM 10
-- 
2.19.1

[PATCH 3/5] ASoC: max9867: Calculate LRCLK divider

[Ladislav Michl]

Drop "Common NI Values Table" and calculate LRCLK divider, then
add allowed rate constraints based on master clock frequency.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
---
 sound/soc/codecs/max9867.c | 207 ++++++++++++++++++-------------------
 sound/soc/codecs/max9867.h |  31 ++----
 2 files changed, 110 insertions(+), 128 deletions(-)

diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
index 07a8205b211a..4a6dc4f82be2 100644
--- a/sound/soc/codecs/max9867.c
+++ b/sound/soc/codecs/max9867.c
@@ -126,124 +126,106 @@ static const struct snd_soc_dapm_route max9867_audio_map[] = {
 	{"LINE_IN", NULL, "Right Line"},
 };
 
-enum rates {
-	pcm_rate_8, pcm_rate_16, pcm_rate_24,
-	pcm_rate_32, pcm_rate_44,
-	pcm_rate_48, max_pcm_rate,
+static const unsigned int max9867_rates_44k1[] = {
+	11025, 22050, 44100,
 };
 
-static const struct ni_div_rates {
-	u32 mclk;
-	u16 ni[max_pcm_rate];
-} ni_div[] = {
-	{11289600, {0x116A, 0x22D4, 0x343F, 0x45A9, 0x6000, 0x687D} },
-	{12000000, {0x1062, 0x20C5, 0x3127, 0x4189, 0x5A51, 0x624E} },
-	{12288000, {0x1000, 0x2000, 0x3000, 0x4000, 0x5833, 0x6000} },
-	{13000000, {0x0F20, 0x1E3F, 0x2D5F, 0x3C7F, 0x535F, 0x5ABE} },
-	{19200000, {0x0A3D, 0x147B, 0x1EB8, 0x28F6, 0x3873, 0x3D71} },
-	{24000000, {0x1062, 0x20C5, 0x1893, 0x4189, 0x5A51, 0x624E} },
-	{26000000, {0x0F20, 0x1E3F, 0x16AF, 0x3C7F, 0x535F, 0x5ABE} },
-	{27000000, {0x0E90, 0x1D21, 0x15D8, 0x3A41, 0x5048, 0x5762} },
+static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = {
+	.list = max9867_rates_44k1,
+	.count = ARRAY_SIZE(max9867_rates_44k1),
 };
 
-static inline int get_ni_value(int mclk, int rate)
+static const unsigned int max9867_rates_48k[] = {
+	8000, 16000, 32000, 48000,
+};
+
+static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = {
+	.list = max9867_rates_48k,
+	.count = ARRAY_SIZE(max9867_rates_48k),
+};
+
+struct max9867_priv {
+	struct regmap *regmap;
+	const struct snd_pcm_hw_constraint_list *constraints;
+	unsigned int sysclk, pclk;
+	bool master, dsp_a;
+};
+
+static int max9867_startup(struct snd_pcm_substream *substream,
+			   struct snd_soc_dai *dai)
 {
-	int i, ret = 0;
+        struct max9867_priv *max9867 =
+		snd_soc_component_get_drvdata(dai->component);
 
-	/* find the closest rate index*/
-	for (i = 0; i < ARRAY_SIZE(ni_div); i++) {
-		if (ni_div[i].mclk >= mclk)
-			break;
-	}
-	if (i == ARRAY_SIZE(ni_div))
-		return -EINVAL;
+	if (max9867->constraints)
+		snd_pcm_hw_constraint_list(substream->runtime, 0,
+			SNDRV_PCM_HW_PARAM_RATE, max9867->constraints);
 
-	switch (rate) {
-	case 8000:
-		return ni_div[i].ni[pcm_rate_8];
-	case 16000:
-		return ni_div[i].ni[pcm_rate_16];
-	case 32000:
-		return ni_div[i].ni[pcm_rate_32];
-	case 44100:
-		return ni_div[i].ni[pcm_rate_44];
-	case 48000:
-		return ni_div[i].ni[pcm_rate_48];
-	default:
-		pr_err("%s wrong rate %d\n", __func__, rate);
-		ret = -EINVAL;
-	}
-	return ret;
+	return 0;
 }
 
 static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
 		struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 {
+	int value;
+	unsigned long int rate, ratio;
 	struct snd_soc_component *component = dai->component;
 	struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
-	unsigned int ni_h, ni_l;
-	int value;
+	unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params),
+						max9867->pclk);
 
-	value = get_ni_value(max9867->sysclk, params_rate(params));
-	if (value < 0)
-		return value;
-
-	ni_h = (0xFF00 & value) >> 8;
-	ni_l = 0x00FF & value;
 	/* set up the ni value */
 	regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
-		MAX9867_NI_HIGH_MASK, ni_h);
+		MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8);
 	regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
-		MAX9867_NI_LOW_MASK, ni_l);
-	if (!max9867->master) {
-		/*
-		 * digital pll locks on to any externally supplied LRCLK signal
-		 * and also enable rapid lock mode.
-		 */
-		regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
-			MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
-		regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
-			MAX9867_PLL, MAX9867_PLL);
-	} else {
-		unsigned long int bclk_rate, pclk_bclk_ratio;
-		int bclk_value;
-
-		bclk_rate = params_rate(params) * 2 * params_width(params);
-		pclk_bclk_ratio = max9867->pclk/bclk_rate;
-		switch (params_width(params)) {
-		case 8:
-		case 16:
-			switch (pclk_bclk_ratio) {
-			case 2:
-				bclk_value = MAX9867_IFC1B_PCLK_2;
-				break;
-			case 4:
-				bclk_value = MAX9867_IFC1B_PCLK_4;
-				break;
+		MAX9867_NI_LOW_MASK, 0x00FF & ni);
+	if (max9867->master) {
+		if (max9867->dsp_a) {
+			value = MAX9867_IFC1B_48X;
+		} else {
+			rate = params_rate(params) * 2 * params_width(params);
+			ratio = max9867->pclk / rate;
+			switch (params_width(params)) {
 			case 8:
-				bclk_value = MAX9867_IFC1B_PCLK_8;
-				break;
 			case 16:
-				bclk_value = MAX9867_IFC1B_PCLK_16;
+				switch (ratio) {
+				case 2:
+					value = MAX9867_IFC1B_PCLK_2;
+					break;
+				case 4:
+					value = MAX9867_IFC1B_PCLK_4;
+					break;
+				case 8:
+					value = MAX9867_IFC1B_PCLK_8;
+					break;
+				case 16:
+					value = MAX9867_IFC1B_PCLK_16;
+					break;
+				default:
+					return -EINVAL;
+				}
+				break;
+			case 24:
+				value = MAX9867_IFC1B_48X;
+				break;
+			case 32:
+				value = MAX9867_IFC1B_64X;
 				break;
 			default:
-				dev_err(component->dev,
-					"unsupported sampling rate\n");
 				return -EINVAL;
 			}
-			break;
-		case 24:
-			bclk_value = MAX9867_IFC1B_24BIT;
-			break;
-		case 32:
-			bclk_value = MAX9867_IFC1B_32BIT;
-			break;
-		default:
-			dev_err(component->dev, "unsupported sampling rate\n");
-			return -EINVAL;
 		}
 		regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
-			MAX9867_IFC1B_BCLK_MASK, bclk_value);
+			MAX9867_IFC1B_BCLK_MASK, value);
+	} else {
+		/*
+		 * digital pll locks on to any externally supplied LRCLK signal
+		 * and also enable rapid lock mode.
+		 */
+		regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
+			MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
+		regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
+			MAX9867_PLL, MAX9867_PLL);
 	}
 	return 0;
 }
@@ -285,8 +267,16 @@ static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 			freq);
 		return -EINVAL;
 	}
-	value = value << MAX9867_PSCLK_SHIFT;
+	if (freq % 48000 == 0)
+		max9867->constraints = &max9867_constraints_48k;
+	else if (freq % 44100 == 0)
+		max9867->constraints = &max9867_constraints_44k1;
+	else
+		dev_warn(component->dev,
+			 "Unable to set exact rate with %uHz clock frequency\n",
+			 freq);
 	max9867->sysclk = freq;
+	value = value << MAX9867_PSCLK_SHIFT;
 	/* exact integer mode is not supported */
 	value &= ~MAX9867_FREQ_MASK;
 	regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
@@ -299,16 +289,17 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
 {
 	struct snd_soc_component *component = codec_dai->component;
 	struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
-	u8 iface1A = 0, iface1B = 0;
+	u8 iface1A, iface1B;
 
 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 	case SND_SOC_DAIFMT_CBM_CFM:
-		max9867->master = 1;
-		iface1A |= MAX9867_MASTER;
+		max9867->master = true;
+		iface1A = MAX9867_MASTER;
+		iface1B = MAX9867_IFC1B_48X;
 		break;
 	case SND_SOC_DAIFMT_CBS_CFS:
-		max9867->master = 0;
-		iface1A &= ~MAX9867_MASTER;
+		max9867->master = false;
+		iface1A = iface1B = 0;
 		break;
 	default:
 		return -EINVAL;
@@ -316,9 +307,11 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
 
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
+		max9867->dsp_a = false;
 		iface1A |= MAX9867_I2S_DLY;
 		break;
 	case SND_SOC_DAIFMT_DSP_A:
+		max9867->dsp_a = true;
 		iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ;
 		break;
 	default:
@@ -344,20 +337,18 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
 
 	regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
 	regmap_write(max9867->regmap, MAX9867_IFC1B, iface1B);
+
 	return 0;
 }
 
 static const struct snd_soc_dai_ops max9867_dai_ops = {
-	.set_fmt = max9867_dai_set_fmt,
 	.set_sysclk	= max9867_set_dai_sysclk,
+	.set_fmt	= max9867_dai_set_fmt,
 	.digital_mute	= max9867_mute,
-	.hw_params = max9867_dai_hw_params,
+	.startup	= max9867_startup,
+	.hw_params	= max9867_dai_hw_params,
 };
 
-#define MAX9867_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
-	SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
-#define MAX9867_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
-
 static struct snd_soc_dai_driver max9867_dai[] = {
 	{
 	.name = "max9867-aif1",
@@ -365,15 +356,15 @@ static struct snd_soc_dai_driver max9867_dai[] = {
 		.stream_name = "HiFi Playback",
 		.channels_min = 2,
 		.channels_max = 2,
-		.rates = MAX9867_RATES,
-		.formats = MAX9867_FORMATS,
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	},
 	.capture = {
 		.stream_name = "HiFi Capture",
 		.channels_min = 2,
 		.channels_max = 2,
-		.rates = MAX9867_RATES,
-		.formats = MAX9867_FORMATS,
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	},
 	.ops = &max9867_dai_ops,
 	.symmetric_rates = 1,
diff --git a/sound/soc/codecs/max9867.h b/sound/soc/codecs/max9867.h
index d9170850c96e..7f037ab701a5 100644
--- a/sound/soc/codecs/max9867.h
+++ b/sound/soc/codecs/max9867.h
@@ -26,13 +26,11 @@
 #define MAX9867_PSCLK_10_20  0x1
 #define MAX9867_PSCLK_20_40  0x2
 #define MAX9867_PSCLK_40_60  0x3
-#define MAX9867_AUDIOCLKHIGH 0x06
-#define MAX9867_NI_HIGH_WIDTH 0x7
-#define MAX9867_NI_HIGH_MASK 0x7F
-#define MAX9867_NI_LOW_MASK 0x7F
-#define MAX9867_NI_LOW_SHIFT 0x1
-#define MAX9867_PLL     (1<<7)
-#define MAX9867_AUDIOCLKLOW  0x07
+#define MAX9867_AUDIOCLKHIGH	0x06
+#define MAX9867_NI_HIGH_MASK	0x7F
+#define MAX9867_NI_LOW_MASK	0xFE
+#define MAX9867_PLL		(1<<7)
+#define MAX9867_AUDIOCLKLOW	0x07
 #define MAX9867_RAPID_LOCK   0x01
 #define MAX9867_IFC1A        0x08
 #define MAX9867_MASTER       (1<<7)
@@ -43,12 +41,12 @@
 #define MAX9867_BCI_MODE     (1<<5)
 #define MAX9867_IFC1B        0x09
 #define MAX9867_IFC1B_BCLK_MASK 7
-#define MAX9867_IFC1B_32BIT  0x01
-#define MAX9867_IFC1B_24BIT  0x02
-#define MAX9867_IFC1B_PCLK_2 4
-#define MAX9867_IFC1B_PCLK_4 5
-#define MAX9867_IFC1B_PCLK_8 6
-#define MAX9867_IFC1B_PCLK_16 7
+#define MAX9867_IFC1B_64X	0x01
+#define MAX9867_IFC1B_48X	0x02
+#define MAX9867_IFC1B_PCLK_2	0x04
+#define MAX9867_IFC1B_PCLK_4	0x05
+#define MAX9867_IFC1B_PCLK_8	0x06
+#define MAX9867_IFC1B_PCLK_16	0x07
 #define MAX9867_CODECFLTR    0x0a
 #define MAX9867_DACGAIN      0x0b
 #define MAX9867_DACLEVEL     0x0c
@@ -72,11 +70,4 @@
 
 #define MAX9867_CACHEREGNUM 10
 
-/* codec private data */
-struct max9867_priv {
-	struct regmap *regmap;
-	unsigned int sysclk;
-	unsigned int pclk;
-	unsigned int master;
-};
 #endif
-- 
2.19.1

[PATCH 4/5] ASoC: max9867: Fix signal paths

[Ladislav Michl]

Sound capture and line bypass currently do not work as well as
some mixer controls. Fix that by building proper audio paths and
adjusting volume controls to match datasheet.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
---
 sound/soc/codecs/max9867.c | 188 ++++++++++++++++++++-----------------
 sound/soc/codecs/max9867.h |   8 +-
 2 files changed, 102 insertions(+), 94 deletions(-)

diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
index 4a6dc4f82be2..11f70e4c6f4a 100644
--- a/sound/soc/codecs/max9867.c
+++ b/sound/soc/codecs/max9867.c
@@ -23,107 +23,124 @@ static const char *const max9867_spmode[] = {
 	"Stereo Single", "Mono Single",
 	"Stereo Single Fast", "Mono Single Fast"
 };
-static const char *const max9867_sidetone_text[] = {
-	"None", "Left", "Right", "LeftRight", "LeftRightDiv2",
-};
 static const char *const max9867_filter_text[] = {"IIR", "FIR"};
 
 static SOC_ENUM_SINGLE_DECL(max9867_filter, MAX9867_CODECFLTR, 7,
 	max9867_filter_text);
 static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
 	max9867_spmode);
-static SOC_ENUM_SINGLE_DECL(max9867_sidetone, MAX9867_DACGAIN, 6,
-	max9867_sidetone_text);
-static DECLARE_TLV_DB_SCALE(max9860_capture_tlv, -600, 200, 0);
-static DECLARE_TLV_DB_SCALE(max9860_mic_tlv, 2000, 100, 1);
-static DECLARE_TLV_DB_SCALE(max9860_adc_left_tlv, -1200, 100, 1);
-static DECLARE_TLV_DB_SCALE(max9860_adc_right_tlv, -1200, 100, 1);
-static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max98088_micboost_tlv,
-	0, 1, TLV_DB_SCALE_ITEM(0, 2000, 0),
-	2, 2, TLV_DB_SCALE_ITEM(3000, 0, 0),
+static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_master_tlv,
+	 0,  2, TLV_DB_SCALE_ITEM(-8600, 200, 1),
+	 3, 17, TLV_DB_SCALE_ITEM(-7800, 400, 0),
+	18, 25, TLV_DB_SCALE_ITEM(-2000, 200, 0),
+	26, 34, TLV_DB_SCALE_ITEM( -500, 100, 0),
+	35, 40, TLV_DB_SCALE_ITEM(  350,  50, 0),
+);
+static DECLARE_TLV_DB_SCALE(max9867_mic_tlv, 0, 100, 0);
+static DECLARE_TLV_DB_SCALE(max9867_line_tlv, -600, 200, 0);
+static DECLARE_TLV_DB_SCALE(max9867_adc_tlv, -1200, 100, 0);
+static DECLARE_TLV_DB_SCALE(max9867_dac_tlv, -1500, 100, 0);
+static DECLARE_TLV_DB_SCALE(max9867_dacboost_tlv, 0, 600, 0);
+static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_micboost_tlv,
+	0, 2, TLV_DB_SCALE_ITEM(-2000, 2000, 1),
+	3, 3, TLV_DB_SCALE_ITEM(3000, 0, 0),
 );
 
 static const struct snd_kcontrol_new max9867_snd_controls[] = {
-	SOC_DOUBLE_R("Master Playback Volume", MAX9867_LEFTVOL,
-				MAX9867_RIGHTVOL, 0, 63, 1),
-	SOC_DOUBLE_R_TLV("Capture Volume", MAX9867_LEFTMICGAIN,
-			MAX9867_RIGHTMICGAIN,
-			0, 15, 1, max9860_capture_tlv),
-	SOC_DOUBLE_R_TLV("Mic Volume", MAX9867_LEFTMICGAIN,
-			MAX9867_RIGHTMICGAIN, 0, 31, 1, max9860_mic_tlv),
-	SOC_DOUBLE_R_TLV("Mic Boost Volume", MAX9867_LEFTMICGAIN,
-			MAX9867_RIGHTMICGAIN, 5, 3, 0, max98088_micboost_tlv),
-	SOC_ENUM("Digital Sidetone Src", max9867_sidetone),
-	SOC_SINGLE("Sidetone Volume", MAX9867_DACGAIN, 0, 31, 1),
-	SOC_SINGLE("DAC Volume", MAX9867_DACLEVEL, 4, 3, 0),
-	SOC_SINGLE("DAC Attenuation", MAX9867_DACLEVEL, 0, 15, 1),
-	SOC_SINGLE_TLV("ADC Left Volume", MAX9867_ADCLEVEL,
-			4, 15, 1, max9860_adc_left_tlv),
-	SOC_SINGLE_TLV("ADC Right Volume", MAX9867_ADCLEVEL,
-			0, 15, 1, max9860_adc_right_tlv),
+	SOC_DOUBLE_R_TLV("Master Playback Volume", MAX9867_LEFTVOL,
+			MAX9867_RIGHTVOL, 0, 41, 1, max9867_master_tlv),
+	SOC_DOUBLE_R_TLV("Line Capture Volume", MAX9867_LEFTLINELVL,
+			MAX9867_RIGHTLINELVL, 0, 15, 1, max9867_line_tlv),
+	SOC_DOUBLE_R_TLV("Mic Capture Volume", MAX9867_LEFTMICGAIN,
+			MAX9867_RIGHTMICGAIN, 0, 20, 1, max9867_mic_tlv),
+	SOC_DOUBLE_R_TLV("Mic Boost Capture Volume", MAX9867_LEFTMICGAIN,
+			MAX9867_RIGHTMICGAIN, 5, 4, 0, max9867_micboost_tlv),
+	SOC_SINGLE("Digital Sidetone Volume", MAX9867_SIDETONE, 0, 31, 1),
+	SOC_SINGLE_TLV("Digital Playback Volume", MAX9867_DACLEVEL, 0, 15, 1,
+			max9867_dac_tlv),
+	SOC_SINGLE_TLV("Digital Boost Playback Volume", MAX9867_DACLEVEL, 4, 3, 0,
+			max9867_dacboost_tlv),
+	SOC_DOUBLE_TLV("Digital Capture Volume", MAX9867_ADCLEVEL, 0, 4, 15, 1,
+			max9867_adc_tlv),
 	SOC_ENUM("Speaker Mode", max9867_spkmode),
 	SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
-	SOC_SINGLE("ZCD Switch", MAX9867_MODECONFIG, 5, 1, 0),
+	SOC_SINGLE("Line ZC Switch", MAX9867_MODECONFIG, 5, 1, 0),
 	SOC_ENUM("DSP Filter", max9867_filter),
 };
 
-static const char *const max9867_mux[] = {"None", "Mic", "Line", "Mic_Line"};
+/* Input mixer */
+static const struct snd_kcontrol_new max9867_input_mixer_controls[] = {
+	SOC_DAPM_DOUBLE("Line Capture Switch", MAX9867_INPUTCONFIG, 7, 5, 1, 0),
+	SOC_DAPM_DOUBLE("Mic Capture Switch", MAX9867_INPUTCONFIG, 6, 4, 1, 0),
+};
+
+/* Output mixer */
+static const struct snd_kcontrol_new max9867_output_mixer_controls[] = {
+	SOC_DAPM_DOUBLE_R("Line Bypass Switch",
+			  MAX9867_LEFTLINELVL, MAX9867_RIGHTLINELVL, 6, 1, 1),
+};
 
-static SOC_ENUM_SINGLE_DECL(max9867_mux_enum,
-	MAX9867_INPUTCONFIG, MAX9867_INPUT_SHIFT,
-	max9867_mux);
+/* Sidetone mixer */
+static const struct snd_kcontrol_new max9867_sidetone_mixer_controls[] = {
+	SOC_DAPM_DOUBLE("Sidetone Switch", MAX9867_SIDETONE, 6, 7, 1, 0),
+};
 
-static const struct snd_kcontrol_new max9867_dapm_mux_controls =
-	SOC_DAPM_ENUM("Route", max9867_mux_enum);
+/* Line out switch */
+static const struct snd_kcontrol_new max9867_line_out_control =
+	SOC_DAPM_DOUBLE_R("Switch",
+			  MAX9867_LEFTVOL, MAX9867_RIGHTVOL, 6, 1, 1);
 
-static const struct snd_kcontrol_new max9867_left_dapm_control =
-	SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 6, 1, 0);
-static const struct snd_kcontrol_new max9867_right_dapm_control =
-	SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 5, 1, 0);
-static const struct snd_kcontrol_new max9867_line_dapm_control =
-	SOC_DAPM_SINGLE("Switch", MAX9867_LEFTLINELVL, 6, 1, 1);
 
 static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
-	SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
-	SND_SOC_DAPM_DAC("Left DAC", NULL, MAX9867_PWRMAN, 3, 0),
-	SND_SOC_DAPM_DAC("Right DAC", NULL, MAX9867_PWRMAN, 2, 0),
-	SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
-	SND_SOC_DAPM_OUTPUT("HPOUT"),
-
-	SND_SOC_DAPM_AIF_IN("DAI_IN", "HiFi Capture", 0, SND_SOC_NOPM, 0, 0),
-	SND_SOC_DAPM_ADC("Left ADC", "HiFi Capture", MAX9867_PWRMAN, 1, 0),
-	SND_SOC_DAPM_ADC("Right ADC", "HiFi Capture", MAX9867_PWRMAN, 0, 0),
-	SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
-		&max9867_dapm_mux_controls),
-
-	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
-	SND_SOC_DAPM_SWITCH("Left Line", MAX9867_LEFTLINELVL, 6, 1,
-		&max9867_left_dapm_control),
-	SND_SOC_DAPM_SWITCH("Right Line", MAX9867_RIGTHLINELVL, 6, 1,
-		&max9867_right_dapm_control),
-	SND_SOC_DAPM_SWITCH("Line Mixer", SND_SOC_NOPM, 0, 0,
-		&max9867_line_dapm_control),
-	SND_SOC_DAPM_INPUT("LINE_IN"),
+	SND_SOC_DAPM_INPUT("MICL"),
+	SND_SOC_DAPM_INPUT("MICR"),
+	SND_SOC_DAPM_INPUT("LINL"),
+	SND_SOC_DAPM_INPUT("LINR"),
+
+	SND_SOC_DAPM_PGA("Left Line Input", MAX9867_PWRMAN, 6, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Right Line Input", MAX9867_PWRMAN, 5, 0, NULL, 0),
+	SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
+				     max9867_input_mixer_controls,
+				     ARRAY_SIZE(max9867_input_mixer_controls)),
+	SND_SOC_DAPM_ADC("ADCL", "HiFi Capture", MAX9867_PWRMAN, 1, 0),
+	SND_SOC_DAPM_ADC("ADCR", "HiFi Capture", MAX9867_PWRMAN, 0, 0),
+
+	SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0,
+			   max9867_sidetone_mixer_controls,
+			   ARRAY_SIZE(max9867_sidetone_mixer_controls)),
+	SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0,
+				     max9867_output_mixer_controls,
+				     ARRAY_SIZE(max9867_output_mixer_controls)),
+	SND_SOC_DAPM_DAC("DACL", "HiFi Playback", MAX9867_PWRMAN, 3, 0),
+	SND_SOC_DAPM_DAC("DACR", "HiFi Playback", MAX9867_PWRMAN, 2, 0),
+	SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0,
+			    &max9867_line_out_control),
+	SND_SOC_DAPM_OUTPUT("LOUT"),
+	SND_SOC_DAPM_OUTPUT("ROUT"),
 };
 
 static const struct snd_soc_dapm_route max9867_audio_map[] = {
-	{"Left DAC", NULL, "DAI_OUT"},
-	{"Right DAC", NULL, "DAI_OUT"},
-	{"Output Mixer", NULL, "Left DAC"},
-	{"Output Mixer", NULL, "Right DAC"},
-	{"HPOUT", NULL, "Output Mixer"},
-
-	{"Left ADC", NULL, "DAI_IN"},
-	{"Right ADC", NULL, "DAI_IN"},
-	{"Input Mixer", NULL, "Left ADC"},
-	{"Input Mixer", NULL, "Right ADC"},
-	{"Input Mux", "Line", "Input Mixer"},
-	{"Input Mux", "Mic", "Input Mixer"},
-	{"Input Mux", "Mic_Line", "Input Mixer"},
-	{"Right Line", "Switch", "Input Mux"},
-	{"Left Line", "Switch", "Input Mux"},
-	{"LINE_IN", NULL, "Left Line"},
-	{"LINE_IN", NULL, "Right Line"},
+	{"Left Line Input", NULL, "LINL"},
+	{"Right Line Input", NULL, "LINR"},
+	{"Input Mixer", "Mic Capture Switch", "MICL"},
+	{"Input Mixer", "Mic Capture Switch", "MICR"},
+	{"Input Mixer", "Line Capture Switch", "Left Line Input"},
+	{"Input Mixer", "Line Capture Switch", "Right Line Input"},
+	{"ADCL", NULL, "Input Mixer"},
+	{"ADCR", NULL, "Input Mixer"},
+
+	{"Digital", "Sidetone Switch", "ADCL"},
+	{"Digital", "Sidetone Switch", "ADCR"},
+	{"DACL", NULL, "Digital"},
+	{"DACR", NULL, "Digital"},
+
+	{"Output Mixer", "Line Bypass Switch", "Left Line Input"},
+	{"Output Mixer", "Line Bypass Switch", "Right Line Input"},
+	{"Output Mixer", NULL, "DACL"},
+	{"Output Mixer", NULL, "DACR"},
+	{"Master Playback", "Switch", "Output Mixer"},
+	{"LOUT", NULL, "Master Playback"},
+	{"ROUT", NULL, "Master Playback"},
 };
 
 static const unsigned int max9867_rates_44k1[] = {
@@ -235,13 +252,8 @@ static int max9867_mute(struct snd_soc_dai *dai, int mute)
 	struct snd_soc_component *component = dai->component;
 	struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
 
-	if (mute)
-		regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
-			MAX9867_DAC_MUTE_MASK, MAX9867_DAC_MUTE_MASK);
-	else
-		regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
-			MAX9867_DAC_MUTE_MASK, 0);
-	return 0;
+	return regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
+				  1 << 6, !!mute << 6);
 }
 
 static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
@@ -408,8 +420,8 @@ static const struct reg_default max9867_reg[] = {
 	{ 0x0B, 0x00 },
 	{ 0x0C, 0x00 },
 	{ 0x0D, 0x00 },
-	{ 0x0E, 0x00 },
-	{ 0x0F, 0x00 },
+	{ 0x0E, 0x40 },
+	{ 0x0F, 0x40 },
 	{ 0x10, 0x00 },
 	{ 0x11, 0x00 },
 	{ 0x12, 0x00 },
diff --git a/sound/soc/codecs/max9867.h b/sound/soc/codecs/max9867.h
index 7f037ab701a5..2277798291a1 100644
--- a/sound/soc/codecs/max9867.h
+++ b/sound/soc/codecs/max9867.h
@@ -48,20 +48,16 @@
 #define MAX9867_IFC1B_PCLK_8	0x06
 #define MAX9867_IFC1B_PCLK_16	0x07
 #define MAX9867_CODECFLTR    0x0a
-#define MAX9867_DACGAIN      0x0b
+#define MAX9867_SIDETONE     0x0b
 #define MAX9867_DACLEVEL     0x0c
-#define MAX9867_DAC_MUTE_SHIFT 0x6
-#define MAX9867_DAC_MUTE_WIDTH 0x1
-#define MAX9867_DAC_MUTE_MASK (0x1<<MAX9867_DAC_MUTE_SHIFT)
 #define MAX9867_ADCLEVEL     0x0d
 #define MAX9867_LEFTLINELVL  0x0e
-#define MAX9867_RIGTHLINELVL 0x0f
+#define MAX9867_RIGHTLINELVL 0x0f
 #define MAX9867_LEFTVOL      0x10
 #define MAX9867_RIGHTVOL     0x11
 #define MAX9867_LEFTMICGAIN  0x12
 #define MAX9867_RIGHTMICGAIN 0x13
 #define MAX9867_INPUTCONFIG  0x14
-#define MAX9867_INPUT_SHIFT  0x6
 #define MAX9867_MICCONFIG    0x15
 #define MAX9867_MODECONFIG   0x16
 #define MAX9867_PWRMAN       0x17
-- 
2.19.1

[PATCH 5/5] ASoC: max9867: Add copyright and module author

[Ladislav Michl]

Driver rewritten, assign copyright notice and change module author
as original one remains silent and I want to be notified about bugs.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
---
 sound/soc/codecs/max9867.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
index da6f604793c3..2a35e012f8aa 100644
--- a/sound/soc/codecs/max9867.c
+++ b/sound/soc/codecs/max9867.c
@@ -1,11 +1,9 @@
-/*
+/* SPDX-License-Identifier: GPL-2.0
+ *
  * max9867.c -- max9867 ALSA SoC Audio driver
  *
  * Copyright 2013-15 Maxim Integrated Products
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
+ * Copyright 2018 Ladislav Michl <ladis@linux-mips.org>
  */
 
 #include <linux/delay.h>
@@ -523,6 +521,6 @@ static struct i2c_driver max9867_i2c_driver = {
 
 module_i2c_driver(max9867_i2c_driver);
 
-MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
-MODULE_DESCRIPTION("ALSA SoC MAX9867 driver");
+MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");
+MODULE_DESCRIPTION("ASoC MAX9867 driver");
 MODULE_LICENSE("GPL");
-- 
2.19.1

Re: [PATCH 2/5] ASoC: max9867: Fix power management

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 1057 bytes --]

On Fri, Nov 23, 2018 at 03:27:29PM +0100, Ladislav Michl wrote:

> Move device enable to probe function. Doing that from prepare
> callback allows only DAC to be enabled.

This seems like it'll be a power consumption regression - instead of
managing the power at runtime we'll just leave the power on all the
time.  The normal place to do this would be either directly through DAPM
or via set_bias_level() - the latter seems a better fit here.

> While here move suspend and resume functions to more common place.

It would be better to split this out from the rest of the change as it's
a fairly large bit of code motion relative to the rest of the patch.

> @@ -491,19 +458,40 @@ static int max9867_i2c_probe(struct i2c_client *i2c,
>  	}
>  	ret = regmap_read(max9867->regmap, MAX9867_REVISION, &reg);
>  	if (ret < 0) {
> -		dev_err(&i2c->dev, "Failed to read: %d\n", ret);
> +		dev_err(&i2c->dev, "Failed to read revision: %d\n", ret);
>  		return ret;
>  	}

This is a cosmetic change unrelated to the rest of the patch, it should
be sent separately.

[-- Attachment #1.2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

[-- Attachment #2: Type: text/plain, Size: 0 bytes --]

Applied "ASoC: max9867: Fix whitespace" to the asoc tree

[Mark Brown]

The patch

   ASoC: max9867: Fix whitespace

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 933662f28981cf8520a814e47acaea53061ec894 Mon Sep 17 00:00:00 2001
From: Ladislav Michl <ladis@linux-mips.org>
Date: Fri, 23 Nov 2018 15:27:00 +0100
Subject: [PATCH] ASoC: max9867: Fix whitespace

Minor changes to match coding style.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/max9867.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
index 4ea3287162ad..1cda54b59854 100644
--- a/sound/soc/codecs/max9867.c
+++ b/sound/soc/codecs/max9867.c
@@ -283,13 +283,13 @@ static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 	/* Set the prescaler based on the master clock frequency*/
 	if (freq >= 10000000 && freq <= 20000000) {
 		value |= MAX9867_PSCLK_10_20;
-		max9867->pclk =  freq;
+		max9867->pclk = freq;
 	} else if (freq >= 20000000 && freq <= 40000000) {
 		value |= MAX9867_PSCLK_20_40;
-		max9867->pclk =  freq/2;
+		max9867->pclk = freq / 2;
 	} else if (freq >= 40000000 && freq <= 60000000) {
 		value |= MAX9867_PSCLK_40_60;
-		max9867->pclk =  freq/4;
+		max9867->pclk = freq / 4;
 	} else {
 		dev_err(component->dev,
 			"Invalid clock frequency %uHz (required 10-60MHz)\n",
@@ -478,8 +478,7 @@ static int max9867_i2c_probe(struct i2c_client *i2c,
 	struct max9867_priv *max9867;
 	int ret = 0, reg;
 
-	max9867 = devm_kzalloc(&i2c->dev,
-			sizeof(*max9867), GFP_KERNEL);
+	max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL);
 	if (!max9867)
 		return -ENOMEM;
 
@@ -490,8 +489,7 @@ static int max9867_i2c_probe(struct i2c_client *i2c,
 		dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
 		return ret;
 	}
-	ret = regmap_read(max9867->regmap,
-			MAX9867_REVISION, &reg);
+	ret = regmap_read(max9867->regmap, MAX9867_REVISION, &reg);
 	if (ret < 0) {
 		dev_err(&i2c->dev, "Failed to read: %d\n", ret);
 		return ret;
-- 
2.19.0.rc2

Re: [PATCH 2/5] ASoC: max9867: Fix power management

[Ladislav Michl]

On Mon, Nov 26, 2018 at 12:57:19PM +0000, Mark Brown wrote:
> On Fri, Nov 23, 2018 at 03:27:29PM +0100, Ladislav Michl wrote:
> 
> > Move device enable to probe function. Doing that from prepare
> > callback allows only DAC to be enabled.
> 
> This seems like it'll be a power consumption regression - instead of
> managing the power at runtime we'll just leave the power on all the
> time.  The normal place to do this would be either directly through DAPM
> or via set_bias_level() - the latter seems a better fit here.

Well, I was unable to measure any consumption difference as all chip
domains are powered down anyway. But see bellow.

> > While here move suspend and resume functions to more common place.
> 
> It would be better to split this out from the rest of the change as it's
> a fairly large bit of code motion relative to the rest of the patch.

So something like this is preffered solution? (untested)

diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
index 1cda54b59854..4510f98724c2 100644
--- a/sound/soc/codecs/max9867.c
+++ b/sound/soc/codecs/max9867.c
@@ -248,17 +248,6 @@ static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static int max9867_prepare(struct snd_pcm_substream *substream,
-			 struct snd_soc_dai *dai)
-{
-	struct snd_soc_component *component = dai->component;
-	struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
-
-	regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
-		MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
-	return 0;
-}
-
 static int max9867_mute(struct snd_soc_dai *dai, int mute)
 {
 	struct snd_soc_component *component = dai->component;
@@ -361,7 +350,6 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
 static const struct snd_soc_dai_ops max9867_dai_ops = {
 	.set_fmt = max9867_dai_set_fmt,
 	.set_sysclk	= max9867_set_dai_sysclk,
-	.prepare	= max9867_prepare,
 	.digital_mute	= max9867_mute,
 	.hw_params = max9867_dai_hw_params,
 };
@@ -392,27 +380,59 @@ static struct snd_soc_dai_driver max9867_dai[] = {
 	}
 };
 
-#ifdef CONFIG_PM_SLEEP
-static int max9867_suspend(struct device *dev)
+#ifdef CONFIG_PM
+static int max9867_suspend(struct snd_soc_component *component)
 {
-	struct max9867_priv *max9867 = dev_get_drvdata(dev);
+	snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
 
-	/* Drop down to power saving mode when system is suspended */
-	regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
-		MAX9867_SHTDOWN_MASK, ~MAX9867_SHTDOWN_MASK);
 	return 0;
 }
 
-static int max9867_resume(struct device *dev)
+static int max9867_resume(struct snd_soc_component *component)
 {
-	struct max9867_priv *max9867 = dev_get_drvdata(dev);
+	snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
 
-	regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
-		MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
 	return 0;
 }
+#else
+#define max9867_suspend	NULL
+#define max9867_resume	NULL
 #endif
 
+static int max9867_set_bias_level(struct snd_soc_component *component,
+				  enum snd_soc_bias_level level)
+{
+	int err;
+	struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
+
+	switch (level) {
+	case SND_SOC_BIAS_STANDBY:
+		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
+			err = regcache_sync(max9867->regmap);
+			if (err)
+				return err;
+
+			err = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
+						 MAX9867_SHTDOWN, MAX9867_SHTDOWN);
+			if (err)
+				return err;
+		}
+		break;
+	case SND_SOC_BIAS_OFF:
+		err = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
+					 MAX9867_SHTDOWN, 0);
+		if (err)
+			return err;
+
+		regcache_mark_dirty(max9867->regmap);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
 static const struct snd_soc_component_driver max9867_component = {
 	.controls		= max9867_snd_controls,
 	.num_controls		= ARRAY_SIZE(max9867_snd_controls),
@@ -420,6 +440,9 @@ static const struct snd_soc_component_driver max9867_component = {
 	.num_dapm_routes	= ARRAY_SIZE(max9867_audio_map),
 	.dapm_widgets		= max9867_dapm_widgets,
 	.num_dapm_widgets	= ARRAY_SIZE(max9867_dapm_widgets),
+	.suspend		= max9867_suspend,
+	.resume			= max9867_resume,
+	.set_bias_level		= max9867_set_bias_level,
 	.idle_bias_on		= 1,
 	.use_pmdown_time	= 1,
 	.endianness		= 1,
@@ -516,15 +539,10 @@ static const struct of_device_id max9867_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, max9867_of_match);
 
-static const struct dev_pm_ops max9867_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(max9867_suspend, max9867_resume)
-};
-
 static struct i2c_driver max9867_i2c_driver = {
 	.driver = {
 		.name = "max9867",
 		.of_match_table = of_match_ptr(max9867_of_match),
-		.pm = &max9867_pm_ops,
 	},
 	.probe  = max9867_i2c_probe,
 	.id_table = max9867_i2c_id,
diff --git a/sound/soc/codecs/max9867.h b/sound/soc/codecs/max9867.h
index 55cd9976ff47..d9170850c96e 100644
--- a/sound/soc/codecs/max9867.h
+++ b/sound/soc/codecs/max9867.h
@@ -67,7 +67,7 @@
 #define MAX9867_MICCONFIG    0x15
 #define MAX9867_MODECONFIG   0x16
 #define MAX9867_PWRMAN       0x17
-#define MAX9867_SHTDOWN_MASK (1<<7)
+#define MAX9867_SHTDOWN      0x80
 #define MAX9867_REVISION     0xff
 
 #define MAX9867_CACHEREGNUM 10

> > @@ -491,19 +458,40 @@ static int max9867_i2c_probe(struct i2c_client *i2c,
> >  	}
> >  	ret = regmap_read(max9867->regmap, MAX9867_REVISION, &reg);
> >  	if (ret < 0) {
> > -		dev_err(&i2c->dev, "Failed to read: %d\n", ret);
> > +		dev_err(&i2c->dev, "Failed to read revision: %d\n", ret);
> >  		return ret;
> >  	}
> 
> This is a cosmetic change unrelated to the rest of the patch, it should
> be sent separately.

I'll drop it completely, it is probably not worth sending separately.

Thank you,
	ladis

Re: [PATCH 2/5] ASoC: max9867: Fix power management

[Mark Brown]

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On Tue, Nov 27, 2018 at 06:37:27PM +0100, Ladislav Michl wrote:
> On Mon, Nov 26, 2018 at 12:57:19PM +0000, Mark Brown wrote:

> > > While here move suspend and resume functions to more common place.

> > It would be better to split this out from the rest of the change as it's
> > a fairly large bit of code motion relative to the rest of the patch.

> So something like this is preffered solution? (untested)

Yes.

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