diff options
| author | Lothar Waßmann <LW@KARO-electronics.de> | 2013-07-31 16:44:29 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-08-01 15:48:17 +0200 |
| commit | f091f3f07328f75d20a2a5970d1f8b58d95fc990 (patch) | |
| tree | 1927daf3cf5962c30d94b865d9c27e5cd59d7d36 /sound/soc/codecs/sgtl5000.c | |
| parent | Linux 3.11-rc3 (diff) | |
| download | linux-f091f3f07328f75d20a2a5970d1f8b58d95fc990.tar.xz linux-f091f3f07328f75d20a2a5970d1f8b58d95fc990.zip | |
ASoC: sgtl5000: prevent playback to be muted when terminating concurrent capture
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>
Diffstat (limited to 'sound/soc/codecs/sgtl5000.c')
| -rw-r--r-- | sound/soc/codecs/sgtl5000.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c index 6c8a9e7bee25..9303c7d011b2 100644 --- a/sound/soc/codecs/sgtl5000.c +++ b/sound/soc/codecs/sgtl5000.c @@ -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; |