g200 hw 3d on powerpc

g200 hw 3d on powerpc

[Konstantinos Margaritis]

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   Hi,
   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?
   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).

- --
Konstantinos Margaritis
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Re: g200 hw 3d on powerpc

[Geert Uytterhoeven]

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.

Nice!

>    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:

    http://www.cs.kuleuven.ac.be/~geert/Linux/Expo/

>    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
follow...

Greetings,

						Geert

--
Geert Uytterhoeven                     Geert.Uytterhoeven@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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