Re: [Survey] headphone <-> master volume swap -- which codec chip?

[Takashi Iwai <tiwai@suse.de>]

At Fri, 24 Jan 2003 12:19:03 +0100,
Pieter Palmers wrote:
> 
> Takashi Iwai wrote:
> 
> >At Fri, 24 Jan 2003 11:53:04 +0100,
> >Pieter Palmers wrote:
> >  
> >
> >>I experience another problem regarding AC97. I have a Maestro2e based 
> >>board, with an ESS ES1918 codec attached. But the AC97 code seems to 
> >>recorgnise it as a Sigmatel Codec.
> >>    
> >>
> >
> >this seems somehow irrelevant, but i can check if you give me the
> >output of ac97#0 and ac97#0regs proc files.
> >
> >
> >Takashi
> >
> 
> it isn't much of a problem, but for the fact that chip-specific controls 
> aren't built correctly. For example: I get a 'surround volume' controle, 
> whilst the codec has only one DAC. Also I have 3D controls, a feature 
> that isn't present on the codec.
 
well, EXTID (0x28) shows actually the bit 0x80, which means that the
chip has surround support.  this is really a system-dependent quirk.

> The fact is that the VID registers indicate that it is a Sigmatel 
> codec... maybe ESS just put their stamp on a sigmatel codec?

yeah, perhaps an OEM chip?


Takashi


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