From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt Subject: Re: [Linux-fbdev-devel] VESA, EDID & flat panels Date: Tue, 04 Oct 2005 13:43:55 +1000 Message-ID: <1128397436.31063.0.camel@gaston> References: <1128380013.8267.125.camel@gaston> <8a0c36780510031618m48c55f45u648d867bcf0130d2@mail.gmail.com> Reply-To: Discuss issues related to the xorg tree Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <8a0c36780510031618m48c55f45u648d867bcf0130d2@mail.gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: xorg-bounces@lists.freedesktop.org Errors-To: xorg-bounces@lists.freedesktop.org Content-Type: text/plain; charset="us-ascii" To: linux-fbdev-devel@lists.sourceforge.net Cc: Discuss issues related to the xorg tree 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.