From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Antonino A. Daplas" Subject: Re: Is framebufer driver a replacement for video driver? Date: Sat, 6 Nov 2004 05:48:22 +0800 Message-ID: <200411060548.23261.adaplas@hotpop.com> References: <4EE0CBA31942E547B99B3D4BFAB348111ECB8A@mail.esn.co.in> Reply-To: linux-fbdev-devel@lists.sourceforge.net 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 (Exim 4.30) id 1CQBxR-0004wI-34 for linux-fbdev-devel@lists.sourceforge.net; Fri, 05 Nov 2004 13:49:21 -0800 Received: from smtp-out.hotpop.com ([38.113.3.71]) by sc8-sf-mx1.sourceforge.net with esmtp (Exim 4.41) id 1CQBxQ-0007an-3D for linux-fbdev-devel@lists.sourceforge.net; Fri, 05 Nov 2004 13:49:21 -0800 Received: from hotpop.com (kubrick.hotpop.com [38.113.3.103]) by smtp-out.hotpop.com (Postfix) with SMTP id BA0E811BEB4F for ; Fri, 5 Nov 2004 21:48:22 +0000 (UTC) In-Reply-To: <4EE0CBA31942E547B99B3D4BFAB348111ECB8A@mail.esn.co.in> 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, "Mukund JB." Cc: adaplas@pol.net, tonnerre@thundrix.ch On Friday 05 November 2004 19:44, Mukund JB. wrote: > Hi Geert, > > Thanks for that. > Please, try to give me more clarity on the framebuffer driver by solving > the below quires? > > > > Are you talking about the vesafb driver? This being a generic > > driver, > > > > Will this driver work on any video card? > > > > Yep, `VESA' means the vesafb driver. It works on any video card with a > > VESA 2.0 > > compliant BIOS. > > If vesafb module works for any card, what are the situations that make > me write a new framebuffer driver for a new video hardware in the > market? > > Is it like, the vesafb driver does not explore the card to the fullest > extent? > A framebuffer driver specific to Video card is just to explore the card > features to maximum. > > Can u please tell me why to call "scr_readw" in accel.c file of riva > directory doing? > Also, I found NO readl, writel calls in the riva directory( framebuffer > driver). Then, who is responsible for accessing the hardware here? > Because the supposedly OS-agnostic file uses direct pointer manipulation, which does imply that this file is not trully OS-agnostic. The rivafb in 2.6.10-rc1-mm3 is already ported to use readl/writel. . Tony ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_id=5588&alloc_id=12065&op=click