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Re: help on linux-mipsel frame buffer

To: Jun Sun <jsun@mvista.com>
Subject: Re: help on linux-mipsel frame buffer
From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Date: Sat, 21 Jul 2001 12:53:52 +0200 (MET DST)
Cc: Fuxin Zhang <fxzhang@ict.ac.cn>, "linux-mips@oss.sgi.com" <linux-mips@oss.sgi.com>
In-reply-to: <3B5875E1.C7D897BE@mvista.com>
Sender: owner-linux-mips@oss.sgi.com
On Fri, 20 Jul 2001, Jun Sun wrote:
> Geert Uytterhoeven wrote:
> > On Wed, 18 Jul 2001, Fuxin Zhang wrote:
> > > 2001-07-18 09:18:00£º
> > > >On Tue, 17 Jul 2001, James Simmons wrote:
> > > >> >   First I try the vga16 frame buffer driver,but i can only get
> > > >> > some black/white strips on the screen.(after made some changes
> > > >> > to the source,most important one is use pci to find and set the
> > > >> > vbase address).
> > > >>
> > > >> It is hardwired into the vga16fb driver the memory region (0xA000). 
> > > >> This
> > > >> is very wrong on non intel platforms. So that drivers pretty much 
> > > >> doesn't
> > > >> work on anything else.
> > > >
> > > >Does your firmware initialize the VGA card to VGA text mode? Vga16fb 
> > > >requires
> > > >this initialization, which is normally done by the VGA BIOS. An x86
> > > >BIOS-emulator may be your friend.
> > > Cound you give me a link to such a emulator?My firmware doesn't 
> > > initialize VGA card.That seems the real problem.
> > 
> > I don't know whether it exists for Linux/MIPS yet.
> 
> FYI,  without the emulator, I have successfully run Matrox Millinium PCI card
> from SGI CVS tree.  

That's because matroxfb is one of the few frame buffer devices that know how to
initialize uninitialized cards.

Gr{oetje,eeting}s,

                                                Geert

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Geert Uytterhoeven ------------- Sony Software Development Center Europe (SDCE)
Geert.Uytterhoeven@sonycom.com ------------------- Sint-Stevens-Woluwestraat 55
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