[alsa-devel] How to trigger a widget?

[Wang, Kuirong]

On 02/20/2012 1:08 AM, Lars-Peter Clausen wrote:
>
>Hi,
>
>snd_soc_dapm_force_enable_pin is probably what you are looking for.
>
>- Lars

Thanks Lars. I tried the snd_soc_dapm_force_enable_pin, it didn't make different.

I have kcontrol to enable a function of codec on fly.  With or without the function, it cannot impact the established audio routing.  So I created widget as a supply, as long as the audio path is established, this supply widget is triggered. The supply widget has a callback event function.  The kcontrol control has an event callback function as well which calls the enable/disable pin to trigger the widget callback event, so this particular function can be enabled or disabled.

Thanks,
- Kuirong