ASoC: max98373: change power down sequence for smart amp

In order to avoid pop noise which occurs when switching
device from speaker to headphone, the amplifier should
power down first when stopping playback.

Signed-off-by: Long Wang <[email protected]>
Signed-off-by: Pierre-Louis Bossart <[email protected]>
Reviewed-by: Bard Liao <[email protected]>
Reviewed-by: Rander Wang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: LongWang100

sound/soc/codecs/max98373.c

@@ -31,7 +31,7 @@ static int max98373_dac_event(struct snd_soc_dapm_widget *w,
 			MAX98373_GLOBAL_EN_MASK, 1);
 		usleep_range(30000, 31000);
 		break;
-	case SND_SOC_DAPM_POST_PMD:
+	case SND_SOC_DAPM_PRE_PMD:
 		regmap_update_bits(max98373->regmap,
 			MAX98373_R20FF_GLOBAL_SHDN,
 			MAX98373_GLOBAL_EN_MASK, 0);
@@ -64,7 +64,7 @@ static const struct snd_kcontrol_new max98373_spkfb_control =
 static const struct snd_soc_dapm_widget max98373_dapm_widgets[] = {
 SND_SOC_DAPM_DAC_E("Amp Enable", "HiFi Playback",
 	MAX98373_R202B_PCM_RX_EN, 0, 0, max98373_dac_event,
-	SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+	SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 SND_SOC_DAPM_MUX("DAI Sel Mux", SND_SOC_NOPM, 0, 0,
 	&max98373_dai_controls),
 SND_SOC_DAPM_OUTPUT("BE_OUT"),