[Linux-fbdev-devel] VESA, EDID & flat panels

[Benjamin Herrenschmidt]

On Mon, 2005-10-03 at 18:18 -0500, Richard Smith wrote:
> > Somebody around here has access to the VESA specs ? I'm trying to figure
> > out if the EDID block, at least on recent flat panels, tells us wether
> > the panel digital input is 6:6:6 or 8:8:8 ... If it's 6:6:6, we should
> > enable dithering in drivers like radeon and "nv", while if 8:8:8, we
> > should not. If not enabling it on a 6 bits panel, we end up with crappy
> > looking gradients, if enabling it on a 8 bits panel, we basically end up
> > sending a 6 bits signal to a 8 bits panel, thus reducing the quality.
> 
> We have  a copy from a few years ago.  Its not too descriptive if
> IIRC.  I'll try to look at it tomorrow.

I found a lot of stuff on VESA Public site in fact. Looks like we really
need to write some infrastructure to get to the EDID extensions :) They
contain all sort of useful infos, though unfortunately, all of the
panels I've come accross so far didn't seem to implement them =P

Ben.