Re: VESA, EDID & flat panels

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Tue, 2005-10-04 at 07:35 -0500, Richard Smith wrote:
> > So I wonder how widespread really is that EEDID stuff... I'm afraid the
> > reason a lot of monitors come with a windows install CD is that they do
> > _not_ provide those infos via EDID, but windows has a database with
> > per-monitor infos (as Apple actually has in OS X) and we should probably
> > do something similar. (but not in the kernel)
> 
> Our experience agrees with you that the EEDID stuff is not well used. 
> We make some LCD driver products and I'm pretty sure we didn't include
> the EEDID info.
> 
> I gave the specs a quick look and I don't see anything in (thats
> obvious) there that would allow you to see if the panel is 666 or 888.
> The specs are somewhat less than clear in several cases so I'll be
> happy to review any sections closer if you think one might be a
> possibility.

Look at the EDID EXTENSIONS spec. Extension 0x40 contains the panel
component bit definition iirc. I found so far only one monitor that
implemented that extended block (the Apple 23" Cinema HD display) but
the content seem to be junk =P

Ben.




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