ASoC: Put WM8958 and WM1811 MICBIAS into bypass mode when no audio
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>
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 0a16de7..207bccd 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -2025,6 +2025,18 @@
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 @@
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 @@
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);