[PATCH v2] ASoC: cs42l42: Add control for audio slow-start switch

[PATCH v2] ASoC: cs42l42: Add control for audio slow-start switch

[Richard Fitzgerald]

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>
---
 sound/soc/codecs/cs42l42.c | 30 +++++++++++++++++++++++++++++-
 sound/soc/codecs/cs42l42.h |  3 +++
 2 files changed, 32 insertions(+), 1 deletion(-)

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,
diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h
index f45bcc9a3a62..c8b3267a318b 100644
--- a/sound/soc/codecs/cs42l42.h
+++ b/sound/soc/codecs/cs42l42.h
@@ -62,6 +62,9 @@
 #define CS42L42_INTERNAL_FS_MASK	(1 << CS42L42_INTERNAL_FS_SHIFT)
 
 #define CS42L42_SFTRAMP_RATE		(CS42L42_PAGE_10 + 0x0A)
+#define CS42L42_SLOW_START_ENABLE	(CS42L42_PAGE_10 + 0x0B)
+#define CS42L42_SLOW_START_EN_MASK	GENMASK(6, 4)
+#define CS42L42_SLOW_START_EN_SHIFT	4
 #define CS42L42_I2C_DEBOUNCE		(CS42L42_PAGE_10 + 0x0E)
 #define CS42L42_I2C_STRETCH		(CS42L42_PAGE_10 + 0x0F)
 #define CS42L42_I2C_TIMEOUT		(CS42L42_PAGE_10 + 0x10)
-- 
2.11.0

Re: [PATCH v2] ASoC: cs42l42: Add control for audio slow-start switch

[Mark Brown]

On Mon, 1 Nov 2021 10:10:06 +0000, Richard Fitzgerald wrote:
> 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.
> 
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: cs42l42: Add control for audio slow-start switch
      commit: 7ec4a058c16f3da9c2c0c66506f45c083198ed30

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

[PATCH 0/4] ASoC: cs42l42: Remove redundant code

[Richard Fitzgerald]

- Remove field writes in regmap_update_bits() calls where the code
  intends that the field value is not changed.

- Remove unnecessary complexity from reporting jack unplug event

- Remove a PLL config value member that was introduced in a bugfix
  but made redundant by a later bugfix.

Richard Fitzgerald (4):
  ASoC: cs42l42: Remove redundant writes to DETECT_MODE
  ASoC: cs42l42: Remove redundant writes to RS_PLUG/RS_UNPLUG masks
  ASoC: cs42l42: Simplify reporting of jack unplug
  ASoC: cs42l42: Remove redundant pll_divout member

 sound/soc/codecs/cs42l42.c | 42 +++++++-----------------------------------
 sound/soc/codecs/cs42l42.h |  1 -
 2 files changed, 7 insertions(+), 36 deletions(-)

-- 
2.11.0

[PATCH v2] ASoC: cs42l42: Add control for audio slow-start switch

[Richard Fitzgerald]

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>
---
 sound/soc/codecs/cs42l42.c | 30 +++++++++++++++++++++++++++++-
 sound/soc/codecs/cs42l42.h |  3 +++
 2 files changed, 32 insertions(+), 1 deletion(-)

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,
diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h
index f45bcc9a3a62..c8b3267a318b 100644
--- a/sound/soc/codecs/cs42l42.h
+++ b/sound/soc/codecs/cs42l42.h
@@ -62,6 +62,9 @@
 #define CS42L42_INTERNAL_FS_MASK	(1 << CS42L42_INTERNAL_FS_SHIFT)
 
 #define CS42L42_SFTRAMP_RATE		(CS42L42_PAGE_10 + 0x0A)
+#define CS42L42_SLOW_START_ENABLE	(CS42L42_PAGE_10 + 0x0B)
+#define CS42L42_SLOW_START_EN_MASK	GENMASK(6, 4)
+#define CS42L42_SLOW_START_EN_SHIFT	4
 #define CS42L42_I2C_DEBOUNCE		(CS42L42_PAGE_10 + 0x0E)
 #define CS42L42_I2C_STRETCH		(CS42L42_PAGE_10 + 0x0F)
 #define CS42L42_I2C_TIMEOUT		(CS42L42_PAGE_10 + 0x10)
-- 
2.11.0