diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2014-11-05 17:19:53 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2014-11-05 16:33:08 +0000 |
| commit | 1b86a3fa4eb3c7a6d738fa21475b92493f8952b1 (patch) | |
| tree | 2a3626c7bd56a3d8cfd88b0ebcbeb07be8a70f86 | |
| parent | f114040e3ea6e07372334ade75d1ee0775c355e1 (diff) | |
| download | linux-1b86a3fa4eb3c7a6d738fa21475b92493f8952b1.tar.bz2 | |
ASoC: ad193x: Keep DAC output stage active in idle
Setting the DAC power-down bit for the ad193x will also disable the DAC
output amplifier. This will cause audible clicks and pops when starting or
stopping playback. To prevent this a new widget is introduced that controls
the DAC power-down bit. This widget is connected to both the DAC and a newly
introduced VMID widget. This makes sure that the DAC power-down bit is not
set as long as a audio sink is connected to the DAC output. At the same time
the PLL and SYSCLK will still be disabled when no playback or capture stream
is active.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | sound/soc/codecs/ad193x.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sound/soc/codecs/ad193x.c b/sound/soc/codecs/ad193x.c index 6844d0b2af68..387530b0b0fd 100644 --- a/sound/soc/codecs/ad193x.c +++ b/sound/soc/codecs/ad193x.c @@ -72,11 +72,13 @@ static const struct snd_kcontrol_new ad193x_snd_controls[] = { }; static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = { - SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1), + SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_PGA("DAC Output", AD193X_DAC_CTRL0, 0, 1, NULL, 0), SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0), SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0), SND_SOC_DAPM_SUPPLY("SYSCLK", AD193X_PLL_CLK_CTRL0, 7, 0, NULL, 0), + SND_SOC_DAPM_VMID("VMID"), SND_SOC_DAPM_OUTPUT("DAC1OUT"), SND_SOC_DAPM_OUTPUT("DAC2OUT"), SND_SOC_DAPM_OUTPUT("DAC3OUT"), @@ -87,13 +89,15 @@ static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = { static const struct snd_soc_dapm_route audio_paths[] = { { "DAC", NULL, "SYSCLK" }, + { "DAC Output", NULL, "DAC" }, + { "DAC Output", NULL, "VMID" }, { "ADC", NULL, "SYSCLK" }, { "DAC", NULL, "ADC_PWR" }, { "ADC", NULL, "ADC_PWR" }, - { "DAC1OUT", NULL, "DAC" }, - { "DAC2OUT", NULL, "DAC" }, - { "DAC3OUT", NULL, "DAC" }, - { "DAC4OUT", NULL, "DAC" }, + { "DAC1OUT", NULL, "DAC Output" }, + { "DAC2OUT", NULL, "DAC Output" }, + { "DAC3OUT", NULL, "DAC Output" }, + { "DAC4OUT", NULL, "DAC Output" }, { "ADC", NULL, "ADC1IN" }, { "ADC", NULL, "ADC2IN" }, { "SYSCLK", NULL, "PLL_PWR" }, |