From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Antonino A. Daplas" Subject: Re: atyfb h/vsync polarity Date: Fri, 22 Jul 2005 12:06:44 +0800 Message-ID: <200507221206.44358.adaplas@gmail.com> References: <20050622140842.GV20191@midgar.lan.raphnet.net> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1DvpZg-0000Y8-Qc for linux-fbdev-devel@lists.sourceforge.net; Thu, 21 Jul 2005 21:55:52 -0700 Received: from rproxy.gmail.com ([64.233.170.198]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1DvpZf-0007zz-Jc for linux-fbdev-devel@lists.sourceforge.net; Thu, 21 Jul 2005 21:55:53 -0700 Received: by rproxy.gmail.com with SMTP id a41so142525rng for ; Thu, 21 Jul 2005 21:55:47 -0700 (PDT) In-Reply-To: <20050622140842.GV20191@midgar.lan.raphnet.net> Content-Disposition: inline Sender: linux-fbdev-devel-admin@lists.sourceforge.net Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: List-Post: List-Help: List-Subscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" To: linux-fbdev-devel@lists.sourceforge.net, Raphael Assenat On Wednesday 22 June 2005 22:08, Raphael Assenat wrote: > Hi, > I am a Linux Sparc64 user, and recently I decided to switch from 2.4 > kernel series to 2.6 series. Everything worked well, but I had trouble > getting the framebuffer console to work. > > In openboot, my monitor worked perfectly. But as soon as Linux > configured the framebuffer, my monitor would loose sync. I compared the > output given by fbset on the working configuration (2.4 kernel) and the > non-working configuration (2.6.12 kernel). Every setting was identical, > except that the output on 2.4 had 'hsync high'. I tried 'fbset -hsync > high', but the screen still did not sync, and fbset still did not report > 'hsync high', as if the setting was ignored. > > After digging a little bit, I found this in > drivers/video/aty/atyfb_base.c: > > if(vdisplay < 400) { > h_sync_pol = 1; > v_sync_pol = 0; > } else if(vdisplay < 480) { > h_sync_pol = 0; > v_sync_pol = 1; > } else if(vdisplay < 768) { > h_sync_pol = 0; > v_sync_pol = 0; > } else { > h_sync_pol = 1; > v_sync_pol = 1; > } > I also believe that the above code is not needed. The appropriate sync signals are already correctly set (hopefully) from the entries in the mode database, kernel or user. Also, if I remember the VGA standards correctly, hsync and vsync should be high if vyres > 400. Tony ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click