[alsa-devel] [PATCH 4/4] ASoC: tlv320dac33: Support for turning off the codec in BIAS_STANDBY

Mark Brown broonie at opensource.wolfsonmicro.com
Fri Apr 30 11:56:37 CEST 2010

On Fri, Apr 30, 2010 at 12:45:38PM +0300, Peter Ujfalusi wrote:
> On Friday 30 April 2010 11:41:00 ext Mark Brown wrote:

> > Moving the playback related configuration into events on the DAC widgets
> > (or probably a supply connected to the DAC widgets) seems like a good
> > move for a lot of these scenarios?  The core will then take care of
> > ensuring that the startup sequence for the playback is called for you
> > and the states can do what they're supposed to more directly.

> This is not working.
> Actually it works, if we come from BIAS_OFF, but...
> If I restart the playback fast (within asoc timeout for BIAS change), than the 
> widget will not get event (since it is still powered). This means that I can not 
> do the needed reconfiguration for the tlv320dac33 -> audio breaks.

> I will keep the current logic, but move it a bit with the idle_bias_off change.

Hrm, you need to do this any time playback is started?  Then just use
the hooks in the normal audio stream bringup/teardown surely?  It's
possible that I'm missing something as a result of your list of use
cases but I'd expect this to flow fairly naturally from the normal call

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