[Gta04-owner] How to bring forward the community?

Dr. H. Nikolaus Schaller hns at goldelico.com
Tue Feb 28 21:25:57 CET 2012


Am 28.02.2012 um 08:38 schrieb Christoph Mair:

> Hi Joerg,
> 
> Warning: the following answer is not based on facts I know. Just a few thoughts.
> 
> On Mon, Feb 27, 2012 at 9:10 PM, Joerg Eesmann <jeesmann at gmx.de> wrote:
>> But GTA04 is OMAP3 based, and OMAP3 has a DSP on board. In the
>> beagleboard, there was a SW-component called DSP-bridge, and when I
>> recall correctly the DSP can be directly be fed with McBSP data. So if
>> the McBSP routing to and from the DSP would be possible, the DSP could
>> do the echo canceling and any possible sound shaping.
> 
> If it's possible on the beagle board, the GTA04 can do it too.
> 
>> So there are some questions:
>> Is the DSP activated in the Kernel for GTA04?
> 
> I saw a mailbox.ko kernel module but probably a few other components
> from TI are necessary to get it working.
> 
>> Is the routing of the McBSP-data to and from the DSP possible?
> 
> Probably yes, but I could immagine that it will be a real mess to
> integrate this into the kernel/alsa stack.
> 
>> I guess the main CPU could sleep during call, leaving the rest to the
>> DSP.
>> Would this idea be feasible?
> 
> The CPU won't sleep completely but should enter a low power state when
> there is nothing else to do.
> 
>> I would love to work on this, if I find the time (I have some experience
>> with signal processing and programming DSPs, but no speech processing),
>> but I doubt I could do it alone.
>> I could do my tests on a beagleboard (with GTA04/Hybrid), which I
>> already have.
> 
> Would be great If you could get the DSP working somehow!

There is also a link to information here (we should use the open issues system
a little more as an archive of important information):

http://projects.goldelico.com/p/gta04-kernel/issues/317/

Nikolaus



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