Re: "nv" driver: Option "FPDither" default value

On Mon, 3 Oct 2005, Benjamin Herrenschmidt wrote:

> On Sun, 2005-10-02 at 18:32 -0700, Mark Vojkovich wrote:
> >    FPDither takes 8 bit output and dithers down to 6 bit.  It
> > will improve the quality on 6 bit panels and degrade it on 8
> > bit panels.  Nearly all desktop panels are 8 bit (only very cheap
> > or very old ones are not).  Most laptop panels have been 6
> > bit, but some high-end laptops have 8 bit panels.
>
> Ok, thanks. Is there a way to "detect" the panel component size (via
> EDID maybe) ? I'm actually surprised that the iMac G5 panel is only 6
> bits but heh, I suppose Apple had to cut costs on this one... I don't
> suppose it could be a chip misconfiguration in the firmware causing it
> to emit 6 bits data only, could it ?
>

   The iMac looks very "laptop-like" so I'm not surprised it has a
6 bit panel.  It might be in the EDID.  I'm not sure how else
software would be able to know.


			Mark.