Fwd: [OLPC-devel] Geode GIT Tree

[Christopher Blizzard]

Jaya Kumar wrote:
>> AD1888's external VRef output, which supplies power to the microphone.
> 
> I suspect the board where the observation was made that a standard mic
> was not working was one which had been moded for DC coupling and/or
> the AC97 VRef register had been overwritten from userspace (in debug
> mode) to perform in DC coupled mode. I think this is what Simon
> Schampijer's email states but I'm not sure so please confirm.
> 
> So I think the conclusion is that there is no problem to be fixed.
> 
> As mentioned before in the thread about audio status, I'll work on
> adding a mixer control for switching into/out of sensor mode which
> would be used together with the EC when that is ready, and the AD1888
> suspend/resume issue.

I think we tried it on a board both with and without the hardware mod. 
But we'll go back and double check.

--Chris