diff options
| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2021-11-01 10:10:06 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-11-15 19:25:23 +0000 |
| commit | 7ec4a058c16f3da9c2c0c66506f45c083198ed30 (patch) | |
| tree | 7a5748bb22b8bc388c605baf88851dc31ac14f8c /sound/soc/codecs/cs42l42.c | |
| parent | 8d0872f6239f9d067d538d8368bdec643bb0d255 (diff) | |
| download | linux-7ec4a058c16f3da9c2c0c66506f45c083198ed30.tar.bz2 | |
ASoC: cs42l42: Add control for audio slow-start switch
This adds an ALSA control so that the slow-start audio ramp feature
can be disabled. This is useful for high-definition audio applications.
The register field is unusual in that it is a 3-bit field with only
two valid values, 000=off and 111=on.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20211101101006.13092-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/cs42l42.c')
| -rw-r--r-- | sound/soc/codecs/cs42l42.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index 27a1c4c73074..56804a3f285e 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -42,6 +42,7 @@ static const struct reg_default cs42l42_reg_defaults[] = { { CS42L42_SRC_CTL, 0x10 }, { CS42L42_MCLK_CTL, 0x02 }, { CS42L42_SFTRAMP_RATE, 0xA4 }, + { CS42L42_SLOW_START_ENABLE, 0x70 }, { CS42L42_I2C_DEBOUNCE, 0x88 }, { CS42L42_I2C_STRETCH, 0x03 }, { CS42L42_I2C_TIMEOUT, 0xB7 }, @@ -177,6 +178,7 @@ static bool cs42l42_readable_register(struct device *dev, unsigned int reg) case CS42L42_MCLK_STATUS: case CS42L42_MCLK_CTL: case CS42L42_SFTRAMP_RATE: + case CS42L42_SLOW_START_ENABLE: case CS42L42_I2C_DEBOUNCE: case CS42L42_I2C_STRETCH: case CS42L42_I2C_TIMEOUT: @@ -387,6 +389,28 @@ static const struct regmap_config cs42l42_regmap = { static DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 100, true); static DECLARE_TLV_DB_SCALE(mixer_tlv, -6300, 100, true); +static int cs42l42_slow_start_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + u8 val; + + /* all bits of SLOW_START_EN much change together */ + switch (ucontrol->value.integer.value[0]) { + case 0: + val = 0; + break; + case 1: + val = CS42L42_SLOW_START_EN_MASK; + break; + default: + return -EINVAL; + } + + return snd_soc_component_update_bits(component, CS42L42_SLOW_START_ENABLE, + CS42L42_SLOW_START_EN_MASK, val); +} + static const char * const cs42l42_hpf_freq_text[] = { "1.86Hz", "120Hz", "235Hz", "466Hz" }; @@ -431,7 +455,11 @@ static const struct snd_kcontrol_new cs42l42_snd_controls[] = { CS42L42_DAC_HPF_EN_SHIFT, true, false), SOC_DOUBLE_R_TLV("Mixer Volume", CS42L42_MIXER_CHA_VOL, CS42L42_MIXER_CHB_VOL, CS42L42_MIXER_CH_VOL_SHIFT, - 0x3f, 1, mixer_tlv) + 0x3f, 1, mixer_tlv), + + SOC_SINGLE_EXT("Slow Start Switch", CS42L42_SLOW_START_ENABLE, + CS42L42_SLOW_START_EN_SHIFT, true, false, + snd_soc_get_volsw, cs42l42_slow_start_put), }; static int cs42l42_hp_adc_ev(struct snd_soc_dapm_widget *w, |