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>
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f114040e3e
Коммит
1b86a3fa4e
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@ -72,11 +72,13 @@ static const struct snd_kcontrol_new ad193x_snd_controls[] = {
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};
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static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
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SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
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SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_PGA("DAC Output", AD193X_DAC_CTRL0, 0, 1, NULL, 0),
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SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
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SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
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SND_SOC_DAPM_SUPPLY("SYSCLK", AD193X_PLL_CLK_CTRL0, 7, 0, NULL, 0),
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SND_SOC_DAPM_VMID("VMID"),
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SND_SOC_DAPM_OUTPUT("DAC1OUT"),
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SND_SOC_DAPM_OUTPUT("DAC2OUT"),
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SND_SOC_DAPM_OUTPUT("DAC3OUT"),
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@ -87,13 +89,15 @@ static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
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static const struct snd_soc_dapm_route audio_paths[] = {
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{ "DAC", NULL, "SYSCLK" },
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{ "DAC Output", NULL, "DAC" },
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{ "DAC Output", NULL, "VMID" },
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{ "ADC", NULL, "SYSCLK" },
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{ "DAC", NULL, "ADC_PWR" },
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{ "ADC", NULL, "ADC_PWR" },
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{ "DAC1OUT", NULL, "DAC" },
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{ "DAC2OUT", NULL, "DAC" },
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{ "DAC3OUT", NULL, "DAC" },
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{ "DAC4OUT", NULL, "DAC" },
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{ "DAC1OUT", NULL, "DAC Output" },
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{ "DAC2OUT", NULL, "DAC Output" },
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{ "DAC3OUT", NULL, "DAC Output" },
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{ "DAC4OUT", NULL, "DAC Output" },
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{ "ADC", NULL, "ADC1IN" },
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{ "ADC", NULL, "ADC2IN" },
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{ "SYSCLK", NULL, "PLL_PWR" },
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