ASoC: Use BIAS_OFF when idle for wm_hubs devices
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>
diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c
index d73c305..a67319d 100644
--- a/sound/soc/codecs/wm_hubs.c
+++ b/sound/soc/codecs/wm_hubs.c
@@ -753,6 +753,12 @@
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);