dect/linux-2.6
Archived
14
0
Fork 0
Code Releases Activity

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

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

40
sound/soc/codecs/wm8994.c
View file

@ -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);