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ASoC: codecs: tas5720: add TAS5722 specific volume control 

The TAS5722 supports modifying volume in 0.25dB steps (as opposed to
0.5dB steps on the TAS5720). Introduce a custom mixer control that
allows taking advantage of this finer output volume granularity.

Also add custom getters/setters for access as the TAS5722 digital volume
controls are split over two registers.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andreas Dannenberg 2018-08-31 09:47:13 -05:00 committed by Mark Brown
parent 5fcb457ac2
commit ec94c177bf
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 80 additions and 8 deletions
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88
sound/soc/codecs/tas5720.c
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@ -485,15 +485,56 @@ static const DECLARE_TLV_DB_RANGE(dac_analog_tlv,
);
/*
* DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that
* setting the gain below -100 dB (register value <0x7) is effectively a MUTE
* as per device datasheet.
* DAC digital volumes. From -103.5 to 24 dB in 0.5 dB or 0.25 dB steps
* depending on the device. Note that setting the gain below -100 dB
* (register value <0x7) is effectively a MUTE as per device datasheet.
*
* Note that for the TAS5722 the digital volume controls are actually split
* over two registers, so we need custom getters/setters for access.
*/
static DECLARE_TLV_DB_SCALE(dac_tlv, -10350, 50, 0);
static DECLARE_TLV_DB_SCALE(tas5720_dac_tlv, -10350, 50, 0);
static DECLARE_TLV_DB_SCALE(tas5722_dac_tlv, -10350, 25, 0);
static int tas5722_volume_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
unsigned int val;
snd_soc_component_read(component, TAS5720_VOLUME_CTRL_REG, &val);
ucontrol->value.integer.value[0] = val << 1;
snd_soc_component_read(component, TAS5722_DIGITAL_CTRL2_REG, &val);
ucontrol->value.integer.value[0] |= val & TAS5722_VOL_CONTROL_LSB;
return 0;
}
static int tas5722_volume_set(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
unsigned int sel = ucontrol->value.integer.value[0];
snd_soc_component_write(component, TAS5720_VOLUME_CTRL_REG, sel >> 1);
snd_soc_component_update_bits(component, TAS5722_DIGITAL_CTRL2_REG,
TAS5722_VOL_CONTROL_LSB, sel);
return 0;
}
static const struct snd_kcontrol_new tas5720_snd_controls[] = {
SOC_SINGLE_TLV("Speaker Driver Playback Volume",
TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, dac_tlv),
TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, tas5720_dac_tlv),
SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
};
static const struct snd_kcontrol_new tas5722_snd_controls[] = {
SOC_SINGLE_EXT_TLV("Speaker Driver Playback Volume",
0, 0, 511, 0,
tas5722_volume_get, tas5722_volume_set,
tas5722_dac_tlv),
SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
};
@ -527,6 +568,23 @@ static const struct snd_soc_component_driver soc_component_dev_tas5720 = {
.non_legacy_dai_naming = 1,
};
static const struct snd_soc_component_driver soc_component_dev_tas5722 = {
.probe = tas5720_codec_probe,
.remove = tas5720_codec_remove,
.suspend = tas5720_suspend,
.resume = tas5720_resume,
.controls = tas5722_snd_controls,
.num_controls = ARRAY_SIZE(tas5722_snd_controls),
.dapm_widgets = tas5720_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(tas5720_dapm_widgets),
.dapm_routes = tas5720_audio_map,
.num_dapm_routes = ARRAY_SIZE(tas5720_audio_map),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
/* PCM rates supported by the TAS5720 driver */
#define TAS5720_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
@ -613,9 +671,23 @@ static int tas5720_probe(struct i2c_client *client,
dev_set_drvdata(dev, data);
ret = devm_snd_soc_register_component(&client->dev,
&soc_component_dev_tas5720,
tas5720_dai, ARRAY_SIZE(tas5720_dai));
switch (id->driver_data) {
case TAS5720:
ret = devm_snd_soc_register_component(&client->dev,
&soc_component_dev_tas5720,
tas5720_dai,
ARRAY_SIZE(tas5720_dai));
break;
case TAS5722:
ret = devm_snd_soc_register_component(&client->dev,
&soc_component_dev_tas5722,
tas5720_dai,
ARRAY_SIZE(tas5720_dai));
break;
default:
dev_err(dev, "unexpected private driver data\n");
return -EINVAL;
}
if (ret < 0) {
dev_err(dev, "failed to register component: %d\n", ret);
return ret;