Untested TAS2562 power setting fixes

Merge series from Martin Povišer <povik+lin@cutebit.org>:

The tas2562 driver does the same thing with the setting of PWR_CTRL
field as the tas2764/tas2770 drivers were doing.
Link: https://lore.kernel.org/alsa-devel/20220808141246.5749-1-povik+lin@cutebit.org/T/#t
Link: https://lore.kernel.org/alsa-devel/20220825140241.53963-1-povik+lin@cutebit.org/T/#t

These are blindly written patches without testing since I don't have
the hardware. (I even tried TI's formal sample request program but
was refused there. CCing @ti.com addresses I found on other series
recently submitted.)

sound/soc/codecs/tas2562.c

@@ -54,6 +54,8 @@ struct tas2562_data {
 	int i_sense_slot;
 	int volume_lvl;
 	int model_id;
+	bool dac_powered;
+	bool unmuted;
 };
 
 enum tas256x_model {
@@ -63,39 +65,6 @@ enum tas256x_model {
 	TAS2110,
 };
 
-static int tas2562_set_bias_level(struct snd_soc_component *component,
-				 enum snd_soc_bias_level level)
-{
-	struct tas2562_data *tas2562 =
-			snd_soc_component_get_drvdata(component);
-
-	switch (level) {
-	case SND_SOC_BIAS_ON:
-		snd_soc_component_update_bits(component,
-			TAS2562_PWR_CTRL,
-			TAS2562_MODE_MASK, TAS2562_ACTIVE);
-		break;
-	case SND_SOC_BIAS_STANDBY:
-	case SND_SOC_BIAS_PREPARE:
-		snd_soc_component_update_bits(component,
-			TAS2562_PWR_CTRL,
-			TAS2562_MODE_MASK, TAS2562_MUTE);
-		break;
-	case SND_SOC_BIAS_OFF:
-		snd_soc_component_update_bits(component,
-			TAS2562_PWR_CTRL,
-			TAS2562_MODE_MASK, TAS2562_SHUTDOWN);
-		break;
-
-	default:
-		dev_err(tas2562->dev,
-				"wrong power level setting %d\n", level);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
 static int tas2562_set_samplerate(struct tas2562_data *tas2562, int samplerate)
 {
 	int samp_rate;
@@ -384,30 +353,43 @@ static int tas2562_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	return 0;
 }
 
+static int tas2562_update_pwr_ctrl(struct tas2562_data *tas2562)
+{
+	struct snd_soc_component *component = tas2562->component;
+	unsigned int val;
+	int ret;
+
+	if (tas2562->dac_powered)
+		val = tas2562->unmuted ?
+			TAS2562_ACTIVE : TAS2562_MUTE;
+	else
+		val = TAS2562_SHUTDOWN;
+
+	ret = snd_soc_component_update_bits(component, TAS2562_PWR_CTRL,
+					    TAS2562_MODE_MASK, val);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
 static int tas2562_mute(struct snd_soc_dai *dai, int mute, int direction)
 {
-	struct snd_soc_component *component = dai->component;
+	struct tas2562_data *tas2562 = snd_soc_component_get_drvdata(dai->component);
 
-	return snd_soc_component_update_bits(component, TAS2562_PWR_CTRL,
-					     TAS2562_MODE_MASK,
-					     mute ? TAS2562_MUTE : 0);
+	tas2562->unmuted = !mute;
+	return tas2562_update_pwr_ctrl(tas2562);
 }
 
 static int tas2562_codec_probe(struct snd_soc_component *component)
 {
 	struct tas2562_data *tas2562 = snd_soc_component_get_drvdata(component);
-	int ret;
 
 	tas2562->component = component;
 
 	if (tas2562->sdz_gpio)
 		gpiod_set_value_cansleep(tas2562->sdz_gpio, 1);
 
-	ret = snd_soc_component_update_bits(component, TAS2562_PWR_CTRL,
-					    TAS2562_MODE_MASK, TAS2562_MUTE);
-	if (ret < 0)
-		return ret;
-
 	return 0;
 }
 
@@ -461,30 +443,18 @@ static int tas2562_dac_event(struct snd_soc_dapm_widget *w,
 
 	switch (event) {
 	case SND_SOC_DAPM_POST_PMU:
-		ret = snd_soc_component_update_bits(component,
-			TAS2562_PWR_CTRL,
-			TAS2562_MODE_MASK,
-			TAS2562_MUTE);
-		if (ret)
-			goto end;
+		tas2562->dac_powered = true;
+		ret = tas2562_update_pwr_ctrl(tas2562);
 		break;
 	case SND_SOC_DAPM_PRE_PMD:
-		ret = snd_soc_component_update_bits(component,
-			TAS2562_PWR_CTRL,
-			TAS2562_MODE_MASK,
-			TAS2562_SHUTDOWN);
-		if (ret)
-			goto end;
+		tas2562->dac_powered = false;
+		ret = tas2562_update_pwr_ctrl(tas2562);
 		break;
 	default:
 		dev_err(tas2562->dev, "Not supported evevt\n");
 		return -EINVAL;
 	}
 
-end:
-	if (ret < 0)
-		return ret;
-
 	return 0;
 }
 
@@ -579,7 +549,6 @@ static const struct snd_soc_component_driver soc_component_dev_tas2110 = {
 	.probe			= tas2562_codec_probe,
 	.suspend		= tas2562_suspend,
 	.resume			= tas2562_resume,
-	.set_bias_level		= tas2562_set_bias_level,
 	.controls		= tas2562_snd_controls,
 	.num_controls		= ARRAY_SIZE(tas2562_snd_controls),
 	.dapm_widgets		= tas2110_dapm_widgets,
@@ -618,7 +587,6 @@ static const struct snd_soc_component_driver soc_component_dev_tas2562 = {
 	.probe			= tas2562_codec_probe,
 	.suspend		= tas2562_suspend,
 	.resume			= tas2562_resume,
-	.set_bias_level		= tas2562_set_bias_level,
 	.controls		= tas2562_snd_controls,
 	.num_controls		= ARRAY_SIZE(tas2562_snd_controls),
 	.dapm_widgets		= tas2562_dapm_widgets,