From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sunset.davemloft.net (unknown [74.93.104.97]) by ozlabs.org (Postfix) with ESMTP id 5FB61DDFC5 for ; Wed, 23 Apr 2008 19:57:21 +1000 (EST) Date: Wed, 23 Apr 2008 02:57:21 -0700 (PDT) Message-Id: <20080423.025721.50367920.davem@davemloft.net> To: michel@tungstengraphics.com Subject: Re: [Linux-fbdev-devel] [PATCH 1/3] radeonfb: Fix 64 bits resources on 32 bits archs From: David Miller In-Reply-To: <1208943127.5632.324.camel@thor.sulgenrain.local> References: <480E0A54.9010203@linux.vnet.ibm.com> <1208902903.9640.138.camel@pasglop> <1208943127.5632.324.camel@thor.sulgenrain.local> Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-1 Cc: linux-fbdev-devel@lists.sourceforge.net, hollisb@us.ibm.com, adaplas@gmail.com, linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, akpm@linux-foundation.org, dzu@denx.de List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Michel D=E4nzer Date: Wed, 23 Apr 2008 11:32:07 +0200 > On Wed, 2008-04-23 at 08:21 +1000, Benjamin Herrenschmidt wrote: > > On Tue, 2008-04-22 at 17:55 +0200, Christian Ehrhardt wrote: > > > I wanted to ask if there are any known workarounds atm that would= > > > allow me to use my X11 for now? > > = > > X is doing a mmap of /dev/mem instead of /dev/fb ? > > = > > You can normally map the fb mapping /dev/fb and then map the regist= ers > > using /dev/fb at an offset beyond the framebuffer (fix->smem_len). > > = > > If X is using /dev/mem instead, then it's being stupid and needs to= be > > fixed... > = > It's up to the driver, and again, the current radeon driver doesn't u= se > radeonfb at all anymore... The only portable thing is for X to use the PCI sysfs mmap() stuff, which current Xorg servers using libpciaccess do. I know because I'm typing this from a sparc64 using a Radeon with current Xorg :-)