ASoC: cs42l84: Adjust mic-detection voltage threshold

Raise the mic-detection voltage threshold to address some mics not
getting detected.

Signed-off-by: Martin Povišer <[email protected]>

Author: povik

sound/soc/codecs/cs42l84.c

@@ -878,7 +878,10 @@ static void cs42l84_setup_plug_detect(struct cs42l84_private *cs42l84)
 		      (CS42L84_TS_PLUG | CS42L84_TS_UNPLUG)) >>
 		      CS42L84_TS_PLUG_SHIFT;
 
-	/* Set up mic detection */
+	/* Set mic-detection threshold */
+	regmap_update_bits(cs42l84->regmap,
+		CS42L84_MIC_DET_CTL1, CS42L84_MIC_DET_CTL1_HS_DET_LEVEL,
+		FIELD_PREP(CS42L84_MIC_DET_CTL1_HS_DET_LEVEL, 0x2c)); /* ~1.9 V */
 
 	/* Disconnect HSBIAS (initially) */
 	regmap_write(cs42l84->regmap,

sound/soc/codecs/cs42l84.h

@@ -106,6 +106,9 @@
 #define CS42L84_MISC_DET_CTL_HSBIAS_CTL         GENMASK(2, 1)
 #define CS42L84_MISC_DET_CTL_PDN_MIC_LVL_DET    BIT(0)
 
+#define CS42L84_MIC_DET_CTL1			0x1475
+#define CS42L84_MIC_DET_CTL1_HS_DET_LEVEL	GENMASK(5, 0)
+
 #define CS42L84_MIC_DET_CTL4			0x1477
 #define CS42L84_MIC_DET_CTL4_LATCH_TO_VP	BIT(1)