[alsa-devel] [PATCH] ASoC: tlv320aic31xx: Add HP output driver pop reduction controls

[Nikita Yushchenko]

HP output driver has two parameters that can be configured to reduce
pop noise: power-on delay and ramp-up step time. Two new kcontrols
have been added to set these parameters.

Signed-off-by: Nikita Yushchenko <nikita.yoush at cogentembedded.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 67323188afd2..740e75032f36 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -263,6 +263,19 @@ static SOC_ENUM_SINGLE_DECL(cm_m_enum, AIC31XX_MICPGAMI, 6, mic_select_text);
 static SOC_ENUM_SINGLE_DECL(mic1lm_m_enum, AIC31XX_MICPGAMI, 4,
 	mic_select_text);
 
+static const char * const hp_poweron_time_text[] = {
+	"0us", "15.3us", "153us", "1.53ms", "15.3ms", "76.2ms",
+	"153ms", "304ms", "610ms", "1.22s", "3.04s", "6.1s" };
+
+static SOC_ENUM_SINGLE_DECL(hp_poweron_time_enum, AIC31XX_HPPOP, 3,
+	hp_poweron_time_text);
+
+static const char * const hp_rampup_step_text[] = {
+	"0ms", "0.98ms", "1.95ms", "3.9ms" };
+
+static SOC_ENUM_SINGLE_DECL(hp_rampup_step_enum, AIC31XX_HPPOP, 1,
+	hp_rampup_step_text);
+
 static const DECLARE_TLV_DB_SCALE(dac_vol_tlv, -6350, 50, 0);
 static const DECLARE_TLV_DB_SCALE(adc_fgain_tlv, 0, 10, 0);
 static const DECLARE_TLV_DB_SCALE(adc_cgain_tlv, -2000, 50, 0);
@@ -286,6 +299,9 @@ static const struct snd_kcontrol_new common31xx_snd_controls[] = {
 
 	SOC_DOUBLE_R_TLV("HP Analog Playback Volume", AIC31XX_LANALOGHPL,
 			 AIC31XX_RANALOGHPR, 0, 0x7F, 1, hp_vol_tlv),
+
+	SOC_ENUM("HP Output Driver Power-On time", hp_poweron_time_enum),
+	SOC_ENUM("HP Output Driver Ramp-up step", hp_rampup_step_enum),
 };
 
 static const struct snd_kcontrol_new aic31xx_snd_controls[] = {
-- 
2.20.1