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ASoC: kirkwood-i2s: fix mute handling 

The spec requires that the mute bits must be set while the channel
is disabled.  Ensure that this is the case by providing a helper
which ensures that the appropriate mute bit is set while the enable
bit is clear.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Russell King 2014-06-26 15:23:05 +01:00 committed by Mark Brown
parent 6772190632
commit 2fbc38219c
1 changed files with 11 additions and 1 deletions
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12
sound/soc/kirkwood/kirkwood-i2s.c
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@ -222,6 +222,15 @@ static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
return 0;
}
static unsigned kirkwood_i2s_play_mute(unsigned ctl)
{
if (!(ctl & KIRKWOOD_PLAYCTL_I2S_EN))
ctl |= KIRKWOOD_PLAYCTL_I2S_MUTE;
if (!(ctl & KIRKWOOD_PLAYCTL_SPDIF_EN))
ctl |= KIRKWOOD_PLAYCTL_SPDIF_MUTE;
return ctl;
}
static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
@ -257,7 +266,7 @@ static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN; /* i2s */
else
ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN; /* spdif */
ctl = kirkwood_i2s_play_mute(ctl);
value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
writel(value, priv->io + KIRKWOOD_PLAYCTL);
@ -296,6 +305,7 @@ static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
KIRKWOOD_PLAYCTL_SPDIF_MUTE);
ctl = kirkwood_i2s_play_mute(ctl);
writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
break;