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ASoC: max9867: keep ADCs and DACs always on 

Updating power management register requires toggling the shutdown
bit otherwise it causes unexpected behavior of the codec.
However, toggling the shutdown bit results in loud speaker crackling.
Setup the power management register only at startup to avoid that.

Signed-off-by: Pavel Dobias <dobias@2n.cz>
Link: https://lore.kernel.org/r/20200522142957.18364-3-dobias@2n.cz
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pavel Dobias 2020-05-22 16:29:57 +02:00 committed by Mark Brown
parent 980b63f8d0
commit 29c859df7b
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 9 additions and 11 deletions
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19
sound/soc/codecs/max9867.c
View File

@ -125,8 +125,8 @@ static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("LINL"),
SND_SOC_DAPM_INPUT("LINR"),
SND_SOC_DAPM_PGA("Left Line Input", MAX9867_PWRMAN, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Line Input", MAX9867_PWRMAN, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("Left Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
max9867_input_mixer_controls,
ARRAY_SIZE(max9867_input_mixer_controls)),
@ -134,8 +134,8 @@ static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
&max9867_left_dmic_mux),
SND_SOC_DAPM_MUX("DMICR Mux", SND_SOC_NOPM, 0, 0,
&max9867_right_dmic_mux),
SND_SOC_DAPM_ADC("ADCL", "HiFi Capture", MAX9867_PWRMAN, 1, 0),
SND_SOC_DAPM_ADC("ADCR", "HiFi Capture", MAX9867_PWRMAN, 0, 0),
SND_SOC_DAPM_ADC("ADCL", "HiFi Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_ADC("ADCR", "HiFi Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0,
max9867_sidetone_mixer_controls,
@ -143,8 +143,8 @@ static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0,
max9867_output_mixer_controls,
ARRAY_SIZE(max9867_output_mixer_controls)),
SND_SOC_DAPM_DAC("DACL", "HiFi Playback", MAX9867_PWRMAN, 3, 0),
SND_SOC_DAPM_DAC("DACR", "HiFi Playback", MAX9867_PWRMAN, 2, 0),
SND_SOC_DAPM_DAC("DACL", "HiFi Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DACR", "HiFi Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0,
&max9867_line_out_control),
SND_SOC_DAPM_OUTPUT("LOUT"),
@ -452,15 +452,14 @@ static int max9867_set_bias_level(struct snd_soc_component *component,
if (err)
return err;
err = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN, MAX9867_SHTDOWN);
err = regmap_write(max9867->regmap,
MAX9867_PWRMAN, 0xff);
if (err)
return err;
}
break;
case SND_SOC_BIAS_OFF:
err = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN, 0);
err = regmap_write(max9867->regmap, MAX9867_PWRMAN, 0);
if (err)
return err;

1
sound/soc/codecs/max9867.h
View File

@ -58,7 +58,6 @@
#define MAX9867_MICCONFIG 0x15
#define MAX9867_MODECONFIG 0x16
#define MAX9867_PWRMAN 0x17
#define MAX9867_SHTDOWN 0x80
#define MAX9867_REVISION 0xff
#define MAX9867_CACHEREGNUM 10