g200 hw 3d on powerpc

Geert Uytterhoeven Geert.Uytterhoeven at cs.kuleuven.ac.be
Mon May 31 17:54:42 EST 1999

On Mon, 31 May 1999, Konstantinos Margaritis wrote:
>    If anyone noticed, the g200-dev project is proceeding along very nicely
> (http://lists.openprojects.net/mailman/listinfo/g200-dev), and it's about
> writing a hw OpenGL driver for the Matrox G200 card. Now I don't really
> care about having a video card that will only work on linux (I think it
> does already on powerpc, using matroxfb) and both mac-on-linux and
> shapeshifter could make a mac card unnecessary even.


>    I talked to some g200-dev developers and the opinions were divided. In
> particular, one thinks that fbdev+g200-glx will work, another one does not.
>    The point is if a user-mode 3d driver, could access the raw hardware
> thru a fb device. I understand that the framebuffer gets mmap'd but what
> about the registers?

You can map the MMIO registers from userspace. That's what the mmio_start and
mmio_len fields in fb_fix_screeninfo are for. More info about the frame buffer
device subsystem can be found in my paper I presented at Linux Expo '99:


>    Anyway, I hope you will see it's an important issue here. If this
> just works on one system, chances are that there will be more willing to
> buy the g200 (and even g400 which is also open-specs).

And once one manufacturer provides specs for their 3D acceleration, others will



Geert Uytterhoeven                     Geert.Uytterhoeven at cs.kuleuven.ac.be
Wavelets, Linux/{m68k~Amiga,PPC~CHRP}  http://www.cs.kuleuven.ac.be/~geert/
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium

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