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ASoC: Use BIAS_OFF when idle for wm_hubs devices

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This provides a small power saving when audio is inactive.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2010-01-21 11:33:20 +00:00
parent a96ca33873
commit 821dd91ec7
1 changed files with 6 additions and 0 deletions
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6
sound/soc/codecs/wm_hubs.c
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@ -753,6 +753,12 @@ int wm_hubs_handle_analogue_pdata(struct snd_soc_codec *codec,
WM8993_LINEOUT2_MODE,
WM8993_LINEOUT2_MODE);
/* If the line outputs are differential then we aren't presenting
* VMID as an output and can disable it.
*/
if (lineout1_diff && lineout2_diff)
codec->idle_bias_off = 1;
if (lineout1fb)
snd_soc_update_bits(codec, WM8993_ADDITIONAL_CONTROL,
WM8993_LINEOUT1_FB, WM8993_LINEOUT1_FB);