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ASoC: Put WM8958 and WM1811 MICBIAS into bypass mode when no audio

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When we don't have any active audio we can put the microphone biases into
bypass mode to save power at the expense of performance.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-11-29 19:58:19 +00:00
parent 9b8f5695a1
commit 500fa30ed5
1 changed files with 39 additions and 1 deletions
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40
sound/soc/codecs/wm8994.c
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@ -2025,6 +2025,18 @@ static int wm8994_set_bias_level(struct snd_soc_codec *codec,
break;
case SND_SOC_BIAS_PREPARE:
/* MICBIAS into regulating mode */
switch (control->type) {
case WM8958:
case WM1811:
snd_soc_update_bits(codec, WM8958_MICBIAS1,
WM8958_MICB1_MODE, 0);
snd_soc_update_bits(codec, WM8958_MICBIAS2,
WM8958_MICB2_MODE, 0);
break;
default:
break;
}
break;
case SND_SOC_BIAS_STANDBY:
@ -2077,7 +2089,20 @@ static int wm8994_set_bias_level(struct snd_soc_codec *codec,
WM8994_LINEOUT2_DISCH);
}
/* MICBIAS into bypass mode on newer devices */
switch (control->type) {
case WM8958:
case WM1811:
snd_soc_update_bits(codec, WM8958_MICBIAS1,
WM8958_MICB1_MODE,
WM8958_MICB1_MODE);
snd_soc_update_bits(codec, WM8958_MICBIAS2,
WM8958_MICB2_MODE,
WM8958_MICB2_MODE);
break;
default:
break;
}
break;
case SND_SOC_BIAS_OFF:
@ -3371,6 +3396,19 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec)
break;
}
/* Put MICBIAS into bypass mode by default on newer devices */
switch (control->type) {
case WM8958:
case WM1811:
snd_soc_update_bits(codec, WM8958_MICBIAS1,
WM8958_MICB1_MODE, WM8958_MICB1_MODE);
snd_soc_update_bits(codec, WM8958_MICBIAS2,
WM8958_MICB2_MODE, WM8958_MICB2_MODE);
break;
default:
break;
}
wm8994_update_class_w(codec);
wm8994_handle_pdata(wm8994);