ASoC talk at CELF conference

ASoC talk at CELF conference

[Liam Girdwood]

I'd like to announce that I'm presenting a talk on ASoC at the CELF
conference in San Jose on the 11th - 12th April.

The conference website is here:-

http://www.celinux.org/elc2006/index.html

My talk is titled "Enhancing ALSA for portable devices" and discusses
new features in ASoC that will make ALSA better for portable and
cellular devices. 

Topics include:

 o Dynamic Audio Power Management (DAPM)
 o Digital Audio Interface (DAI) matching and optimising for low power.
 o Pop and click reduction
 o Dealing with external audio events (i.e. jack insertion)
 o Usage Scenario setting.

There is source code at http://www.rpsys.net/openzaurus/patches/alsa/
for the first three topics. The last two topics are still in the
planning stage and I'll be posting an RFC to the list shortly after my
return.

I'm hoping to submit ASoC to alsa-kernel at the end of April / start of
May. It's relatively stable now and is in need of some further
documentation before submission. 


Liam




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Re: ASoC talk at CELF conference

[Takashi Iwai]

At Wed, 05 Apr 2006 13:42:36 +0100,
Liam Girdwood wrote:
> 
> I'd like to announce that I'm presenting a talk on ASoC at the CELF
> conference in San Jose on the 11th - 12th April.
> 
> The conference website is here:-
> 
> http://www.celinux.org/elc2006/index.html
> 
> My talk is titled "Enhancing ALSA for portable devices" and discusses
> new features in ASoC that will make ALSA better for portable and
> cellular devices. 
> 
> Topics include:
> 
>  o Dynamic Audio Power Management (DAPM)
>  o Digital Audio Interface (DAI) matching and optimising for low power.
>  o Pop and click reduction
>  o Dealing with external audio events (i.e. jack insertion)

That's interesting.

Currently, hda-intel driver achieves it via workqueue.  A codec issues
an irq for an unsolicited event, and the driver puts the event to a
workq that is processed asynchronously.


>  o Usage Scenario setting.
> 
> There is source code at http://www.rpsys.net/openzaurus/patches/alsa/
> for the first three topics. The last two topics are still in the
> planning stage and I'll be posting an RFC to the list shortly after my
> return.
> 
> I'm hoping to submit ASoC to alsa-kernel at the end of April / start of
> May. It's relatively stable now and is in need of some further
> documentation before submission. 

Good to hear.  Sooner is better for merge ;)


Takashi


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