From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Antonino A. Daplas" Subject: Re: 8 words bursts for fbdev driver Date: Mon, 28 May 2007 23:40:08 +0800 Message-ID: <1180366808.4526.4.camel@daplas> References: <1180365959.465af4876a6a8@imp.free.fr> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HshKV-0004QB-Hx for linux-fbdev-devel@lists.sourceforge.net; Mon, 28 May 2007 08:40:19 -0700 Received: from wx-out-0506.google.com ([66.249.82.228]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1HshKT-0002Ng-PF for linux-fbdev-devel@lists.sourceforge.net; Mon, 28 May 2007 08:40:19 -0700 Received: by wx-out-0506.google.com with SMTP id t15so1263030wxc for ; Mon, 28 May 2007 08:40:17 -0700 (PDT) In-Reply-To: <1180365959.465af4876a6a8@imp.free.fr> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-fbdev-devel-bounces@lists.sourceforge.net Errors-To: linux-fbdev-devel-bounces@lists.sourceforge.net To: linux-fbdev-devel@lists.sourceforge.net On Mon, 2007-05-28 at 17:25 +0200, xcsnake@free.fr wrote: > Hello, > > I have posted this message on the linux-kernel mailing list, but I think it > could be more appropriate here. > I'm working on a FPGA vga controller, with an arm cpu (at91rm9200). My FPGA is > plugged on a 16 bits data bus. I'm trying to develop the framebuffer driver, > from the epson s1d13xxxfb driver to use my controller. I have a first driver > which works well. To accelerate my controller, I would like to read and write in > my video memory (controlled by the FPGA) by 8 words bursts. Is it possible to > tell the kernel that the memory must be accessed only by 8 words bursts ?? > My driver is available on http://xcsnake.free.fr/driver You can write your own fillrect, imageblit and copyarea routine. The same with fb_read and fb_write. For userland that mmap's the framebuffer, I don't think there's a way to tell them how to access the framebuffer. Tony ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/