[alsa-devel] [PATCH 0/8] ASoC: TWL4030: DAPM implementation for outputs (playback)

[Mark Brown]

On Tue, Dec 09, 2008 at 08:51:58AM +0200, Peter Ujfalusi wrote:

> As I see: when the twl4030_power_down is called from the 
> twl4030_set_bias_level (SND_SOC_BIAS_STANDBY, SND_SOC_BIAS_OFF) it sets the 
> codec to power-off state (CODEC_MODE:CODECPDZ = 0), which effectively turns 
> off the digital filter, analog section, so basically everything.
> When the CODECPDZ is 0, APGA, DAC, analog output settings have no effect (they 
> are powered off)

Right, that's what I thought.  You'll need to fix this in order to use
bypass paths since it will turn off the analogue.