[alsa-devel] [REANNOUNCE] Audio Mini Summit 2015, 8th October, Dublin

[Vinod Koul]

On Tue, Aug 04, 2015 at 05:13:35PM +0100, Mark Brown wrote:
> On Mon, Aug 03, 2015 at 08:51:28AM +0530, Vinod Koul wrote:
> > On Sat, Aug 01, 2015 at 09:37:16AM +0200, Lars-Peter Clausen wrote:
> 
> > > Full media controller integration for both ALSA and ASoC. How this can be
> > > used to export topology information to userspace and how to for example
> > > attach a specific volume control to a specific media controller entity. And
> > > maybe also how to de-duplicate similar functionality between DAPM and media
> > > controller.
> 
> > The recently merged topology core allows us to 'send' the complete topology
> > information for a component to kernel drivers.
> 
> > So with this we now we have two additional choices:
> > - assuming all components use topology framework, we don't need to query, we
> >   use the topology information available in usermode. Some more support to
> >   parse topology binary installed and show as controls in alsa-lib might be
> >   required here
> 
> That'd require us to move all the DAPM information for drivers out of
> the kernel and into userspace which seems a bit worrying - it's going to
> be harder for things that need events and I worry about the effect on
> quality of implementation if people stop sending things to get reviewed.
Not for this option, for example in SKL.

kernel doesnt have toplogy information coded in, it is parsed and build from
topology binary which is built by alsa-lib. So if we add more alsa-lib APIs
to parse the installed binary we have good view of system without going to
kernel, we know complete graph and controls...

> > - do a reverse path, based on dapm and control info (driver will need to add
> >   code for linking the two) we add a new reverse API, which tells us the
> >   topology information from kernel
> 
> That's basically what the media controller API discussion has been.
Yes lets discuss more during the conf...

-- 
~Vinod
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