[alsa-devel] ASoC: Max98090 Codec DAPM Widget setup in Open Embedded

[Variksla]

> On Mar 24, 2015, at 12:26 AM, Lars-Peter Clausen <lars at metafoo.de> wrote:
> 
>> On 03/24/2015 07:54 AM, noman pouigt wrote:
>> On Mon, Mar 23, 2015 at 11:53 PM, noman pouigt <variksla at gmail.com> wrote:
>>>> I would like to know which file I can use to connect/enable
>>>> DPAM widgets permanently so a simple aplay/record can work?
>>>> 
>>>> My environment is:
>>>> - Yocto Linux Kernel 3.10 - (DTS based)
>>>> - Max98090 Codec
>>>> - imx6SL SoC
>>>> 
>>>> I thought about doing this in alsa.conf or asound.conf but I couldn't
>>>> find a single example with DAPM widgets .
>>> 
>>> I am also stuck with the same problem. I am sure ALSA experts
>>> can help here.
>>> 
>>> What i want to know is how to set the dapm widgets in open
>>> embedded? Is it alsa.conf or asound.conf ?
>>> 
>>> I need to set something like this:
>>> amixer cset  name="LEFT MIXER DAC" 1
>>> 
>>> Using amixer i am able to playback but i don't know how can i
>>> modify conf file to have this dapm widgets associated with
>>> a device.
>>> 
>>> Any example would suffice.
> 
> Hi,
> 
> The whole point of DAPM (dynamic audio power management) is that you don't have to manually power up or down a widget. Userspace configures the routing of the audio paths and the kernel automatically detects which parts of the chip need to be powered up for the current routing configuration.
> 
> Why do you want to manually enable a widget?

In android we have ucm files where dapm routings are associated with each device. Same way where can I list down dapm routings in open embedded?
We know that user space gives the routings but we need to associate each device with certain set of dapm routes so i am looking for a place where we can list down dapm routes which gets triggered when a specific device is chosen for playback or recording. Something analogous to ucm files in open embedded? I couldn't find a way to associate dapm routes with a specific device in conf files. Can we use Asound.conf for this purpose?
> 
> - Lars
>