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ASoC: sgtl5000: prevent playback to be muted when terminating concurrent capture

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When a sound capture/playback is terminated while a playback/capture
is running, power_vag_event() will clear SGTL5000_CHIP_ANA_POWER in
the SND_SOC_DAPM_PRE_PMD event, thus muting the respective other
channel.

Don't clear SGTL5000_CHIP_ANA_POWER when both DAC and ADC are active
to prevent this.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Lothar Waßmann 2013-07-31 16:44:29 +02:00 committed by Mark Brown
parent 5ae90d8e46
commit f091f3f073
1 changed files with 13 additions and 3 deletions
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16
sound/soc/codecs/sgtl5000.c
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@ -153,6 +153,8 @@ static int mic_bias_event(struct snd_soc_dapm_widget *w,
static int power_vag_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
const u32 mask = SGTL5000_DAC_POWERUP | SGTL5000_ADC_POWERUP;
switch (event) {
case SND_SOC_DAPM_POST_PMU:
snd_soc_update_bits(w->codec, SGTL5000_CHIP_ANA_POWER,
@ -160,9 +162,17 @@ static int power_vag_event(struct snd_soc_dapm_widget *w,
break;
case SND_SOC_DAPM_PRE_PMD:
snd_soc_update_bits(w->codec, SGTL5000_CHIP_ANA_POWER,
SGTL5000_VAG_POWERUP, 0);
msleep(400);
/*
* Don't clear VAG_POWERUP, when both DAC and ADC are
* operational to prevent inadvertently starving the
* other one of them.
*/
if ((snd_soc_read(w->codec, SGTL5000_CHIP_ANA_POWER) &
mask) != mask) {
snd_soc_update_bits(w->codec, SGTL5000_CHIP_ANA_POWER,
SGTL5000_VAG_POWERUP, 0);
msleep(400);
}
break;
default:
break;