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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/sound/soc/codecs/cs42xx8.c
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@@ -14,6 +14,7 @@
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 #include <linux/delay.h>
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 #include <linux/module.h>
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 #include <linux/of_device.h>
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+#include <linux/gpio/consumer.h>
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 #include <linux/pm_runtime.h>
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 #include <linux/regulator/consumer.h>
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 #include <sound/pcm_params.h>
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@@ -45,6 +46,8 @@
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 	bool slave_mode;
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 	unsigned long sysclk;
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 	u32 tx_channels;
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+	struct gpio_desc *gpiod_reset;
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+	u32 rate[2];
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 };
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 /* -127.5dB to 0dB with step of 0.5dB */
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@@ -174,21 +177,27 @@
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 };
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178
 
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 struct cs42xx8_ratios {
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-	unsigned int ratio;
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-	unsigned char speed;
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-	unsigned char mclk;
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+	unsigned int mfreq;
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+	unsigned int min_mclk;
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+	unsigned int max_mclk;
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+	unsigned int ratio[3];
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 };
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185
 
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+/*
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+ * According to reference mannual, define the cs42xx8_ratio struct
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+ * MFreq2 | MFreq1 | MFreq0 |     Description     | SSM | DSM | QSM |
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+ * 0      | 0      | 0      |1.029MHz to 12.8MHz  | 256 | 128 |  64 |
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+ * 0      | 0      | 1      |1.536MHz to 19.2MHz  | 384 | 192 |  96 |
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+ * 0      | 1      | 0      |2.048MHz to 25.6MHz  | 512 | 256 | 128 |
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+ * 0      | 1      | 1      |3.072MHz to 38.4MHz  | 768 | 384 | 192 |
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+ * 1      | x      | x      |4.096MHz to 51.2MHz  |1024 | 512 | 256 |
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+ */
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 static const struct cs42xx8_ratios cs42xx8_ratios[] = {
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-	{ 64, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_256(4) },
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-	{ 96, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_384(4) },
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-	{ 128, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_512(4) },
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-	{ 192, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_768(4) },
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-	{ 256, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_256(1) },
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-	{ 384, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_384(1) },
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-	{ 512, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_512(1) },
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-	{ 768, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_768(1) },
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-	{ 1024, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_1024(1) }
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+	{ 0, 1029000, 12800000, {256, 128, 64} },
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+	{ 2, 1536000, 19200000, {384, 192, 96} },
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+	{ 4, 2048000, 25600000, {512, 256, 128} },
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+	{ 6, 3072000, 38400000, {768, 384, 192} },
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+	{ 8, 4096000, 51200000, {1024, 512, 256} },
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 };
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202
 
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 static int cs42xx8_set_dai_sysclk(struct snd_soc_dai *codec_dai,
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@@ -255,14 +264,68 @@
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 	struct snd_soc_component *component = dai->component;
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 	struct cs42xx8_priv *cs42xx8 = snd_soc_component_get_drvdata(component);
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 	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
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-	u32 ratio = cs42xx8->sysclk / params_rate(params);
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-	u32 i, fm, val, mask;
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+	u32 ratio[2];
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+	u32 rate[2];
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+	u32 fm[2];
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+	u32 i, val, mask;
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+	bool condition1, condition2;
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272
 
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 	if (tx)
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 		cs42xx8->tx_channels = params_channels(params);
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275
 
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+	rate[tx]  = params_rate(params);
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+	rate[!tx] = cs42xx8->rate[!tx];
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+
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+	ratio[tx] = rate[tx] > 0 ? cs42xx8->sysclk / rate[tx] : 0;
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+	ratio[!tx] = rate[!tx] > 0 ? cs42xx8->sysclk / rate[!tx] : 0;
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+
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+	/* Get functional mode for tx and rx according to rate */
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+	for (i = 0; i < 2; i++) {
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+		if (cs42xx8->slave_mode) {
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+			fm[i] = CS42XX8_FM_AUTO;
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+		} else {
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+			if (rate[i] < 50000) {
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+				fm[i] = CS42XX8_FM_SINGLE;
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+			} else if (rate[i] > 50000 && rate[i] < 100000) {
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+				fm[i] = CS42XX8_FM_DOUBLE;
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+			} else if (rate[i] > 100000 && rate[i] < 200000) {
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+				fm[i] = CS42XX8_FM_QUAD;
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+			} else {
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+				dev_err(component->dev,
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+					"unsupported sample rate\n");
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+				return -EINVAL;
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+			}
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+		}
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+	}
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+
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 	for (i = 0; i < ARRAY_SIZE(cs42xx8_ratios); i++) {
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-		if (cs42xx8_ratios[i].ratio == ratio)
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+		/* Is the ratio[tx] valid ? */
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+		condition1 = ((fm[tx] == CS42XX8_FM_AUTO) ?
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+			(cs42xx8_ratios[i].ratio[0] == ratio[tx] ||
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+			cs42xx8_ratios[i].ratio[1] == ratio[tx] ||
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+			cs42xx8_ratios[i].ratio[2] == ratio[tx]) :
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+			(cs42xx8_ratios[i].ratio[fm[tx]] == ratio[tx])) &&
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+			cs42xx8->sysclk >= cs42xx8_ratios[i].min_mclk &&
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+			cs42xx8->sysclk <= cs42xx8_ratios[i].max_mclk;
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+
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+		if (!ratio[tx])
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+			condition1 = true;
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+
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+		/* Is the ratio[!tx] valid ? */
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+		condition2 = ((fm[!tx] == CS42XX8_FM_AUTO) ?
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+			(cs42xx8_ratios[i].ratio[0] == ratio[!tx] ||
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+			cs42xx8_ratios[i].ratio[1] == ratio[!tx] ||
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+			cs42xx8_ratios[i].ratio[2] == ratio[!tx]) :
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+			(cs42xx8_ratios[i].ratio[fm[!tx]] == ratio[!tx]));
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+
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+		if (!ratio[!tx])
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+			condition2 = true;
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+
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+		/*
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+		 * Both ratio[tx] and ratio[!tx] is valid, then we get
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+		 * a proper MFreq.
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+		 */
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+		if (condition1 && condition2)
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 			break;
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 	}
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@@ -271,19 +334,35 @@
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 		return -EINVAL;
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 	}
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-	mask = CS42XX8_FUNCMOD_MFREQ_MASK;
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-	val = cs42xx8_ratios[i].mclk;
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+	cs42xx8->rate[tx] = params_rate(params);
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338
 
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-	fm = cs42xx8->slave_mode ? CS42XX8_FM_AUTO : cs42xx8_ratios[i].speed;
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+	mask = CS42XX8_FUNCMOD_MFREQ_MASK;
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+	val = cs42xx8_ratios[i].mfreq;
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341
 
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 	regmap_update_bits(cs42xx8->regmap, CS42XX8_FUNCMOD,
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 			   CS42XX8_FUNCMOD_xC_FM_MASK(tx) | mask,
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-			   CS42XX8_FUNCMOD_xC_FM(tx, fm) | val);
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+			   CS42XX8_FUNCMOD_xC_FM(tx, fm[tx]) | val);
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 	return 0;
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 }
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348
 
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-static int cs42xx8_digital_mute(struct snd_soc_dai *dai, int mute)
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+static int cs42xx8_hw_free(struct snd_pcm_substream *substream,
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+			   struct snd_soc_dai *dai)
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+{
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+	struct snd_soc_component *component = dai->component;
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+	struct cs42xx8_priv *cs42xx8 = snd_soc_component_get_drvdata(component);
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+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
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+
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+	/* Clear stored rate */
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+	cs42xx8->rate[tx] = 0;
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+
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+	regmap_update_bits(cs42xx8->regmap, CS42XX8_FUNCMOD,
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+			   CS42XX8_FUNCMOD_xC_FM_MASK(tx),
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+			   CS42XX8_FUNCMOD_xC_FM(tx, CS42XX8_FM_AUTO));
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+	return 0;
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+}
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+
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+static int cs42xx8_mute(struct snd_soc_dai *dai, int mute, int direction)
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 {
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 	struct snd_soc_component *component = dai->component;
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 	struct cs42xx8_priv *cs42xx8 = snd_soc_component_get_drvdata(component);
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@@ -300,7 +379,9 @@
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 	.set_fmt	= cs42xx8_set_dai_fmt,
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 	.set_sysclk	= cs42xx8_set_dai_sysclk,
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 	.hw_params	= cs42xx8_hw_params,
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-	.digital_mute	= cs42xx8_digital_mute,
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+	.hw_free	= cs42xx8_hw_free,
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+	.mute_stream	= cs42xx8_mute,
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+	.no_capture_mute = 1,
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 };
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 static struct snd_soc_dai_driver cs42xx8_dai = {
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@@ -467,6 +548,13 @@
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 		return -EINVAL;
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 	}
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+	cs42xx8->gpiod_reset = devm_gpiod_get_optional(dev, "reset",
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+							GPIOD_OUT_HIGH);
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+	if (IS_ERR(cs42xx8->gpiod_reset))
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+		return PTR_ERR(cs42xx8->gpiod_reset);
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+
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+	gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 0);
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+
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 	cs42xx8->clk = devm_clk_get(dev, "mclk");
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 	if (IS_ERR(cs42xx8->clk)) {
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 		dev_err(dev, "failed to get the clock: %ld\n",
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@@ -547,6 +635,8 @@
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 		return ret;
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 	}
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+	gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 0);
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+
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 	ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies),
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 				    cs42xx8->supplies);
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 	if (ret) {
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@@ -586,6 +676,8 @@
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 	regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),
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 			       cs42xx8->supplies);
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+	gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 1);
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+
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 	clk_disable_unprepare(cs42xx8->clk);
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 	return 0;
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@@ -593,6 +685,8 @@
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 #endif
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686
 
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 const struct dev_pm_ops cs42xx8_pm = {
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+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
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+				pm_runtime_force_resume)
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 	SET_RUNTIME_PM_OPS(cs42xx8_runtime_suspend, cs42xx8_runtime_resume, NULL)
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 };
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 EXPORT_SYMBOL_GPL(cs42xx8_pm);