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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/sound/soc/codecs/tas6424.c
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..
@@ -2,7 +2,7 @@
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 /*
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  * ALSA SoC Texas Instruments TAS6424 Quad-Channel Audio Amplifier
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  *
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- * Copyright (C) 2016-2017 Texas Instruments Incorporated - http://www.ti.com/
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+ * Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/
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  *	Author: Andreas Dannenberg <dannenberg@ti.com>
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  *	Andrew F. Davis <afd@ti.com>
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  */
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@@ -41,6 +41,7 @@
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 	struct regmap *regmap;
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 	struct regulator_bulk_data supplies[TAS6424_NUM_SUPPLIES];
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 	struct delayed_work fault_check_work;
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+	unsigned int last_cfault;
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 	unsigned int last_fault1;
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 	unsigned int last_fault2;
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 	unsigned int last_warn;
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@@ -251,7 +252,7 @@
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 	return 0;
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 }
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254
 
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-static int tas6424_mute(struct snd_soc_dai *dai, int mute)
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+static int tas6424_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 tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);
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@@ -377,11 +378,12 @@
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 	.non_legacy_dai_naming	= 1,
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 };
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380
 
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-static struct snd_soc_dai_ops tas6424_speaker_dai_ops = {
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+static const struct snd_soc_dai_ops tas6424_speaker_dai_ops = {
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 	.hw_params	= tas6424_hw_params,
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 	.set_fmt	= tas6424_set_dai_fmt,
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 	.set_tdm_slot	= tas6424_set_dai_tdm_slot,
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-	.digital_mute	= tas6424_mute,
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+	.mute_stream	= tas6424_mute,
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+	.no_capture_mute = 1,
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 };
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 static struct snd_soc_dai_driver tas6424_dai[] = {
..
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@@ -406,9 +408,54 @@
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 	unsigned int reg;
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 	int ret;
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+	ret = regmap_read(tas6424->regmap, TAS6424_CHANNEL_FAULT, &reg);
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+	if (ret < 0) {
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+		dev_err(dev, "failed to read CHANNEL_FAULT register: %d\n", ret);
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+		goto out;
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+	}
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+
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+	if (!reg) {
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+		tas6424->last_cfault = reg;
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+		goto check_global_fault1_reg;
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+	}
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+
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+	/*
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+	 * Only flag errors once for a given occurrence. This is needed as
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+	 * the TAS6424 will take time clearing the fault condition internally
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+	 * during which we don't want to bombard the system with the same
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+	 * error message over and over.
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+	 */
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+	if ((reg & TAS6424_FAULT_OC_CH1) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH1))
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+		dev_crit(dev, "experienced a channel 1 overcurrent fault\n");
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+
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+	if ((reg & TAS6424_FAULT_OC_CH2) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH2))
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+		dev_crit(dev, "experienced a channel 2 overcurrent fault\n");
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+
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+	if ((reg & TAS6424_FAULT_OC_CH3) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH3))
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+		dev_crit(dev, "experienced a channel 3 overcurrent fault\n");
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+
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+	if ((reg & TAS6424_FAULT_OC_CH4) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH4))
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+		dev_crit(dev, "experienced a channel 4 overcurrent fault\n");
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+
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+	if ((reg & TAS6424_FAULT_DC_CH1) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH1))
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+		dev_crit(dev, "experienced a channel 1 DC fault\n");
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+
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+	if ((reg & TAS6424_FAULT_DC_CH2) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH2))
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+		dev_crit(dev, "experienced a channel 2 DC fault\n");
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+
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+	if ((reg & TAS6424_FAULT_DC_CH3) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH3))
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+		dev_crit(dev, "experienced a channel 3 DC fault\n");
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+
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+	if ((reg & TAS6424_FAULT_DC_CH4) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH4))
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+		dev_crit(dev, "experienced a channel 4 DC fault\n");
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+
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+	/* Store current fault1 value so we can detect any changes next time */
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+	tas6424->last_cfault = reg;
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+
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+check_global_fault1_reg:
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 	ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT1, &reg);
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 	if (ret < 0) {
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-		dev_err(dev, "failed to read FAULT1 register: %d\n", ret);
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+		dev_err(dev, "failed to read GLOB_FAULT1 register: %d\n", ret);
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 		goto out;
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 	}
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..
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@@ -429,12 +476,6 @@
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 		goto check_global_fault2_reg;
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 	}
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-	/*
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-	 * Only flag errors once for a given occurrence. This is needed as
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-	 * the TAS6424 will take time clearing the fault condition internally
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-	 * during which we don't want to bombard the system with the same
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-	 * error message over and over.
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-	 */
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 	if ((reg & TAS6424_FAULT_PVDD_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_OV))
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 		dev_crit(dev, "experienced a PVDD overvoltage fault\n");
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@@ -453,7 +494,7 @@
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 check_global_fault2_reg:
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 	ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT2, &reg);
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 	if (ret < 0) {
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-		dev_err(dev, "failed to read FAULT2 register: %d\n", ret);
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+		dev_err(dev, "failed to read GLOB_FAULT2 register: %d\n", ret);
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 		goto out;
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 	}
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..
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@@ -530,7 +571,7 @@
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 	/* Store current warn value so we can detect any changes next time */
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 	tas6424->last_warn = reg;
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-	/* Clear any faults by toggling the CLEAR_FAULT control bit */
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+	/* Clear any warnings by toggling the CLEAR_FAULT control bit */
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 	ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3,
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 				TAS6424_CLEAR_FAULT, TAS6424_CLEAR_FAULT);
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 	if (ret < 0)