From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: atyfb in 2.5.51 Date: 11 Dec 2002 00:42:29 -0800 Sender: linux-kernel-owner@vger.kernel.org Message-ID: <1039596149.24691.2.camel@rth.ninka.net> References: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Id: Cc: Benjamin Herrenschmidt , Paul Mackerras , Linux Kernel Mailing List , Linux Fbdev development list On Tue, 2002-12-10 at 22:18, James Simmons wrote: > > AFAIK, the X "mach64" driver in XF 4.* doesn't care about UseFBDev. > > Marc Aurele La France (maintainer of this driver) is basically allergic > > to kernel fbdev support. > > :-( I've always stated that the whole fbdev model was flawed, it makes basic assumptions about how a video card's memory and registers are accessed (ie. the programming model) and many popular cards absolutely do not fit into that model. > I will have to go threw the X code to fix that :-( There is nothing to fix. You simply must restore the video state when the last mmap() client goes away. The __sparc__ code does exactly that. I think relying on an application that mmap's a card to perfectly restore the state would work in a perfect world, one we do not live in. Furthermore, fixing up the state like I am suggesting makes life much simpler for people actually working on things like X servers and other programs directly programming the ATI chip.