[alsa-devel] [PATCH] ASoC: rt5640: change widgetsequencefordepop

[Bard Liao]

> One thing that could work is to setup SND_SOC_DAPM_{PRE,POST}_REG
> events for the SWITCH widget. This callback gets called whenever user
> changes the control (and it is not disabled by DAPM). The next step then would
> be to set up an internal event callback for kcontrol widgets which then again
> calls the event callbacks for the kcontrol's widgets like we do in
> dapm_widget_update(). But I'm not convinced that this is the best way to solve
> this. I think it makes things more complicated than they need to be. I think
> having a OUTDRV widget along the path that runs the mute and unmute
> sequence might be a better option.
> And then have virtual switch control to let userspace disconnect the path, so
> that it is still possbile to manually mute it.

Does "virtual switch control" mean a switch control which will not touch the codec's register actually?

> 
> - Lars
> 
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