ASoC: cs42l84: Double tip and ring sense debounce timings

There are user reports of unreliable headset detection on Macbooks with
cs42l84 jack codecs like in #294. One way to reproduce this is to insert
a headset jack not fully but only until tip sense tiggers. The
headset/mic detection fails and is not retried once the jack is fully
inserted.
This might not be related to the issue the user sees. Another
possiblility is that the headset detection parameters / algorithm
differs from macos and doesn't detect this particular headset reliably.

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

sound/soc/codecs/cs42l84.c

@@ -906,14 +906,14 @@ static void cs42l84_setup_plug_detect(struct cs42l84_private *cs42l84)
 			CS42L84_RING_SENSE_CTL_INV | CS42L84_RING_SENSE_CTL_UNK1 |
 			CS42L84_RING_SENSE_CTL_RISETIME | CS42L84_RING_SENSE_CTL_FALLTIME,
 			CS42L84_RING_SENSE_CTL_INV | CS42L84_RING_SENSE_CTL_UNK1 |
-			FIELD_PREP(CS42L84_RING_SENSE_CTL_RISETIME, CS42L84_DEBOUNCE_TIME_125MS) |
-			FIELD_PREP(CS42L84_RING_SENSE_CTL_FALLTIME, CS42L84_DEBOUNCE_TIME_125MS));
+			FIELD_PREP(CS42L84_RING_SENSE_CTL_RISETIME, CS42L84_DEBOUNCE_TIME_250MS) |
+			FIELD_PREP(CS42L84_RING_SENSE_CTL_FALLTIME, CS42L84_DEBOUNCE_TIME_250MS));
 	regmap_update_bits(cs42l84->regmap, CS42L84_TIP_SENSE_CTL,
 			CS42L84_TIP_SENSE_CTL_INV |
 			CS42L84_TIP_SENSE_CTL_RISETIME | CS42L84_TIP_SENSE_CTL_FALLTIME,
 			CS42L84_TIP_SENSE_CTL_INV |
-			FIELD_PREP(CS42L84_TIP_SENSE_CTL_RISETIME, CS42L84_DEBOUNCE_TIME_500MS) |
-			FIELD_PREP(CS42L84_TIP_SENSE_CTL_FALLTIME, CS42L84_DEBOUNCE_TIME_125MS));
+			FIELD_PREP(CS42L84_TIP_SENSE_CTL_RISETIME, CS42L84_DEBOUNCE_TIME_1000MS) |
+			FIELD_PREP(CS42L84_TIP_SENSE_CTL_FALLTIME, CS42L84_DEBOUNCE_TIME_250MS));
 	regmap_update_bits(cs42l84->regmap, CS42L84_MSM_BLOCK_EN3,
 			CS42L84_MSM_BLOCK_EN3_TR_SENSE,
 			CS42L84_MSM_BLOCK_EN3_TR_SENSE);

sound/soc/codecs/cs42l84.h

@@ -208,7 +208,10 @@
 #define CS42L84_ASP_TX_CH2_WIDTH		0x506e
 
 #define CS42L84_DEBOUNCE_TIME_125MS	0b001
+#define CS42L84_DEBOUNCE_TIME_250MS	0b010
 #define CS42L84_DEBOUNCE_TIME_500MS	0b011
+#define CS42L84_DEBOUNCE_TIME_750MS	0b100
+#define CS42L84_DEBOUNCE_TIME_1000MS	0b101
 
 #define CS42L84_BOOT_TIME_US		3000
 #define CS42L84_CLOCK_SWITCH_DELAY_US	150