From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manousaridis Angelos Subject: Driver development Date: Thu, 09 Oct 2003 12:55:00 +0300 Sender: linux-fbdev-devel-admin@lists.sourceforge.net Message-ID: <3F853074.3010604@inaccessnetworks.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Cipher TLSv1:DES-CBC3-SHA:168) (Exim 3.31-VA-mm2 #1 (Debian)) id 1A7XVg-0007lz-00 for ; Thu, 09 Oct 2003 02:55:04 -0700 Received: from node3.inaccessnetworks.com ([212.205.200.118] helo=inaccessnetworks.com) by sc8-sf-mx1.sourceforge.net with esmtp (Exim 4.22) id 1A7XVe-0001ZJ-MM for linux-fbdev-devel@lists.sourceforge.net; Thu, 09 Oct 2003 02:55:02 -0700 Received: from inaccessnetworks.com (firewall [212.205.200.117]) by inaccessnetworks.com (8.12.1/8.12.1) with ESMTP id h999t0v1008576 for ; Thu, 9 Oct 2003 12:55:00 +0300 Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Linux Fbdev development list Hello all, I have a custom video board for a strongARM embedded platform. Its purpose is to decode MPEG video streams and display the video on a TV screen. This board uses the Teralogic 751 chip for graphics blending and display. The TL751 is connected to an external SDRAM, for framebuffer and video storage. It has 4 overlay planes: two for video, one for graphics and one for a hw cursor. I want to write a driver for some applications that require access to the graphics plane. These applications will write bitmaps to the framebuffer memory of the TL751. I want to avoid using custom interfaces, so I thought that it would be a good idea to implement a frame buffer device for that purpose. While looking at the framebuffer API though, I found a some stuff that are not applicable for my case. All that beam tracking and monitor synchronization fields for instance. The chip I am using does all that handling because the output is fixed to either PAL or NTSC. I want to be able to set these two modes, but I don't need all the details (timings, margins etc). Another issue is with the console stuff. I am not interested in having a framebuffer console. All I want is to give apps an API to the framebuffer memory. I see a lot of work has been done towards the direction of splitting the fb device stuff and the fb console stuff, but can I write a fb driver with no reference to fbcon? Is it possible to implement such a framebuffer driver? I want to look at some code to understand how the API works. From the drivers included in the kernel tree (drivers/video), which are closest to what I am trying to do? thanks in advance, Manousaridis Angelos ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. SourceForge.net hosts over 70,000 Open Source Projects. See the people who have HELPED US provide better services: Click here: http://sourceforge.net/supporters.php