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ASoC: wm8994: Don't bother lowering clock dividers inside idle AIFs

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This increases the chances we'll manage to hit a partially configured
state on restart and the power savings are extremely small.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-03-30 11:21:45 +01:00
parent 172b4c5c8a
commit 1947dadf2a
1 changed files with 0 additions and 29 deletions
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29
sound/soc/codecs/wm8994.c
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@ -2623,33 +2623,6 @@ static int wm8994_aif3_hw_params(struct snd_pcm_substream *substream,
return snd_soc_update_bits(codec, aif1_reg, WM8994_AIF1_WL_MASK, aif1); return snd_soc_update_bits(codec, aif1_reg, WM8994_AIF1_WL_MASK, aif1);
} }
static void wm8994_aif_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
int rate_reg = 0;
switch (dai->id) {
case 1:
rate_reg = WM8994_AIF1_RATE;
break;
case 2:
rate_reg = WM8994_AIF2_RATE;
break;
default:
break;
}
/* If the DAI is idle then configure the divider tree for the
* lowest output rate to save a little power if the clock is
* still active (eg, because it is system clock).
*/
if (rate_reg && !dai->playback_active && !dai->capture_active)
snd_soc_update_bits(codec, rate_reg,
WM8994_AIF1_SR_MASK |
WM8994_AIF1CLK_RATE_MASK, 0x9);
}
static int wm8994_aif_mute(struct snd_soc_dai *codec_dai, int mute) static int wm8994_aif_mute(struct snd_soc_dai *codec_dai, int mute)
{ {
struct snd_soc_codec *codec = codec_dai->codec; struct snd_soc_codec *codec = codec_dai->codec;
@ -2731,7 +2704,6 @@ static const struct snd_soc_dai_ops wm8994_aif1_dai_ops = {
.set_sysclk = wm8994_set_dai_sysclk, .set_sysclk = wm8994_set_dai_sysclk,
.set_fmt = wm8994_set_dai_fmt, .set_fmt = wm8994_set_dai_fmt,
.hw_params = wm8994_hw_params, .hw_params = wm8994_hw_params,
.shutdown = wm8994_aif_shutdown,
.digital_mute = wm8994_aif_mute, .digital_mute = wm8994_aif_mute,
.set_pll = wm8994_set_fll, .set_pll = wm8994_set_fll,
.set_tristate = wm8994_set_tristate, .set_tristate = wm8994_set_tristate,
@ -2741,7 +2713,6 @@ static const struct snd_soc_dai_ops wm8994_aif2_dai_ops = {
.set_sysclk = wm8994_set_dai_sysclk, .set_sysclk = wm8994_set_dai_sysclk,
.set_fmt = wm8994_set_dai_fmt, .set_fmt = wm8994_set_dai_fmt,
.hw_params = wm8994_hw_params, .hw_params = wm8994_hw_params,
.shutdown = wm8994_aif_shutdown,
.digital_mute = wm8994_aif_mute, .digital_mute = wm8994_aif_mute,
.set_pll = wm8994_set_fll, .set_pll = wm8994_set_fll,
.set_tristate = wm8994_set_tristate, .set_tristate = wm8994_set_tristate,