ASoC: rt1308: add silence detection and manual PDB control

We enable the silence detection function in initial settings.
PDB control changes to manual mode, hence the driver could
fully control the AMP output on/off.
Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://lore.kernel.org/r/20190719063249.18806-1-shumingf@realtek.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt1308.c

@@ -40,10 +40,10 @@ static const struct reg_sequence init_list[] = {
 	{ RT1308_VREF,			0x18100000 },
 	{ RT1308_IV_SENSE,		0x87010000 },
 	{ RT1308_DUMMY_REG,		0x00000200 },
-	{ RT1308_SIL_DET,		0x61c30000 },
+	{ RT1308_SIL_DET,		0xe1c30000 },
 	{ RT1308_DC_CAL_2,		0x00ffff00 },
 	{ RT1308_CLK_DET,		0x01000000 },
-	{ RT1308_POWER_STATUS,		0x00800000 },
+	{ RT1308_POWER_STATUS,		0x08800000 },
 	{ RT1308_DAC_SET,		0xafaf0700 },
 
 };
@@ -308,12 +308,13 @@ static int rt1308_classd_event(struct snd_soc_dapm_widget *w,
 	case SND_SOC_DAPM_POST_PMU:
 		msleep(30);
 		snd_soc_component_update_bits(component, RT1308_POWER_STATUS,
-			RT1308_POW_PDB_REG_BIT, RT1308_POW_PDB_REG_BIT);
+			RT1308_POW_PDB_REG_BIT | RT1308_POW_PDB_MN_BIT,
+			RT1308_POW_PDB_REG_BIT | RT1308_POW_PDB_MN_BIT);
 		msleep(40);
 		break;
 	case SND_SOC_DAPM_PRE_PMD:
 		snd_soc_component_update_bits(component, RT1308_POWER_STATUS,
-			RT1308_POW_PDB_REG_BIT, 0);
+			RT1308_POW_PDB_REG_BIT | RT1308_POW_PDB_MN_BIT, 0);
 		usleep_range(150000, 200000);
 		break;