ASoC: cs42l43: Disable headphone clamps during type detection

The headphone clamps cause fairly loud pops during type detect
because they sink current from the detection process itself. Disable
the clamps whilst the type detect runs, to improve the detection
pop performance.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20250423090944.1504538-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/cs42l43-jack.c b/sound/soc/codecs/cs42l43-jack.c
index 20e6ab6..6165ac1 100644 (file)
--- a/sound/soc/codecs/cs42l43-jack.c
+++ b/sound/soc/codecs/cs42l43-jack.c
@@ -654,6 +654,10 @@ static int cs42l43_run_type_detect(struct cs42l43_codec *priv)
 
        reinit_completion(&priv->type_detect);
 
+       regmap_update_bits(cs42l43->regmap, CS42L43_STEREO_MIC_CLAMP_CTRL,
+                          CS42L43_SMIC_HPAMP_CLAMP_DIS_FRC_VAL_MASK,
+                          CS42L43_SMIC_HPAMP_CLAMP_DIS_FRC_VAL_MASK);
+
        cs42l43_start_hs_bias(priv, true);
        regmap_update_bits(cs42l43->regmap, CS42L43_HS2,
                           CS42L43_HSDET_MODE_MASK, 0x3 << CS42L43_HSDET_MODE_SHIFT);
@@ -665,6 +669,9 @@ static int cs42l43_run_type_detect(struct cs42l43_codec *priv)
                           CS42L43_HSDET_MODE_MASK, 0x2 << CS42L43_HSDET_MODE_SHIFT);
        cs42l43_stop_hs_bias(priv);
 
+       regmap_update_bits(cs42l43->regmap, CS42L43_STEREO_MIC_CLAMP_CTRL,
+                          CS42L43_SMIC_HPAMP_CLAMP_DIS_FRC_VAL_MASK, 0);
+
        if (!time_left)
                return -ETIMEDOUT;