Thread (12 messages) 12 messages, 3 authors, 2005-10-10

Re: VESA, EDID & flat panels

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2005-10-10 05:53:41

On Tue, 2005-10-04 at 07:35 -0500, Richard Smith wrote:
quoted
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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