[alsa-devel] Use Case Manager Test Drive [Was: Re: ASoC: Hiding unused CODEC mixer widgets in the machine driver]

[Liam Girdwood]

On Fri, 2010-08-06 at 12:34 +0100, Liam Girdwood wrote:
> On Fri, 2010-08-06 at 12:19 +0100, Mark Brown wrote:
> > On Fri, Aug 06, 2010 at 10:18:45AM +1000, Stuart Longland wrote:
> > 
> > > Work has continued on the TLV320AIC3204 CODEC driver, and there have
> > > been a number of fixes since the last patch was published.  However,
> > > this CODEC is a rather complicated beast to drive, some may find the
> > > controls a little unweildy, and as such, I was wondering if the machine
> > > driver could be used to abstract this for a given target?
> > 
> > The machine driver shouldn't be doing this - it's too fragile in the
> > face of any changes in the drivers and means hard coding use cases into
> > the kernel which is really bad practice since it's much slower than
> > doing things from user space and much harder to change as new needs
> > arise.
> > 
> > Much of this should be being handled by use case management anyway, even
> > the controls that actually exist usefully on a given system are normally
> > way more detail than end applications should ever be seeing.  See
> > 
> > 	http://www.slimlogic.co.uk/?p=40
> > 
> > for the API which should deal with that.  
> > 
> 
> Please do give UCM (Use Case Manager) a test drive. We are in the late
> development / early testing phase before upstreaming (still one or two
> things todo).
> 
> You will need to checkout the use-case-verb branches of :-
> 
> git://git.slimlogic.co.uk/alsa-lib.git
> 
> git://git.slimlogic.co.uk/alsa-utils.git
> 
> There is a tool called alsaucm that allows changing the use case from
> the command line. Best to use it's interactive (-i) mode atm.
> 
> There is also an initial repository for UCM use case configuration files
> here :-
> 
> git://git.slimlogic.co.uk/alsa-ucm-conf.git
> 
> This will show the format required to describe use cases.
> 

Forgot to add that patches are most welcome.

Thanks

Liam
-- 
Freelance Developer, SlimLogic Ltd
ASoC and Voltage Regulator Maintainer.
http://www.slimlogic.co.uk