From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Steve Spano" Subject: ##3 Frame Buffer Questions? Date: Fri, 18 Aug 2006 10:30:20 -0400 Message-ID: <010701c6c2d2$e04cd450$6400a8c0@fleballnchain> Reply-To: steve@flconsult.com, linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1121748470==" 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 1GE5O1-0002fH-Qm for linux-fbdev-devel@lists.sourceforge.net; Fri, 18 Aug 2006 07:31:49 -0700 Received: from mail.danica.com ([205.232.74.72] helo=danicacomputing.com) by mail.sourceforge.net with esmtp (Exim 4.44) id 1GE5Nz-0002sC-3i for linux-fbdev-devel@lists.sourceforge.net; Fri, 18 Aug 2006 07:31:49 -0700 Received: from fleballnchain (cpe-24-59-110-67.twcny.res.rr.com [24.59.110.67]) by danicacomputing.com (mail2.danicacomputing.com) (MDaemon PRO v9.0.4) with ESMTP id md50001158051.msg for ; Fri, 18 Aug 2006 10:30:54 -0400 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 This is a multi-part message in MIME format. --===============1121748470== Content-Type: multipart/alternative; boundary="----=_NextPart_000_0108_01C6C2B1.593B3450" This is a multi-part message in MIME format. ------=_NextPart_000_0108_01C6C2B1.593B3450 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Folks, I have a question. Working on a "semi-custom" frame buffer for a Xilinx FPGA with the Microblaze. The specific file we started with is already in the uclinux/drivers/video and is called xilinxfb.c We can register the driver and a debug trace in the driver shows that it registers as FB0 29-0, so that should be right. However, if I do a cat /dev/fb0 the linux responds by saying it can't open the device. It appears that somehow the default file pointer in dev/fb0 cannot connect to the actual driver? MKNODing the driver also fails. I do have other drivers that we have made that do install, so this isn't the first attempt at a driver. Any thoughts on where I may look for some ideas on this? Thanks! Steve Spano, President Finger Lakes Engineering 119 South Cayuga #200 Ithaca, Ny 14850 (V) 607-277-1614 x223 (C) 607-342-1150 www.FL-ENG.com - FLE's Main Website www.FLEDEVFORUM.com - FLE's Developer Forum ------=_NextPart_000_0108_01C6C2B1.593B3450 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Folks,

 

I have a question.


Working on a “semi-custom” frame buffer for a Xilinx FPGA = with the Microblaze.

 

The specific file we started with is already in the = uclinux/drivers/video and is called xilinxfb.c

 

We can register the driver and a debug trace in the = driver shows that it registers as FB0 29-0, so that should be = right.

 

However, if I do a cat /dev/fb0  the linux = responds by saying it can’t open the device. It appears that somehow the = default file pointer in dev/fb0 cannot connect to the actual = driver?

 

MKNODing the driver also fails.

 

I do have other drivers that we have made that do = install, so this isn’t the first attempt at a driver.

 

Any thoughts on where I may look for some ideas on = this?

 

Thanks!

 

Steve Spano, President

Finger Lakes Engineering

119 South Cayuga #200

Ithaca, Ny 14850

(V) 607-277-1614 x223

(C) 607-342-1150

www.FL-ENG.com - FLE's Main = Website

www.FLEDEVFORUM.com - FLE's Developer Forum

 

 

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