Re: clgenfb.c and i386 (Cirrus Logic FB)

Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
Wed, 18 Nov 1998 10:15:24 +0100 (CET)

On Tue, 17 Nov 1998, Martynas Kunigelis wrote:
> Richard A Nelson wrote:
> > I see that clgenfb.c isn't supported for i386 arch ;-{
>
> The same unfortunately holds true for many cards, S3 Virge in my case.
> There is virgefb.c, but not for i386 :(
>
> How much effort is required to "backport" the drivers? IIRC, most of the
> depend on the firmware to set the initial graphics mode, which is of no
> help on PC.

This is only temporary. Our real goal is to have full featured drivers that
can initialize the chipsets theirselves. All help is welcome, of course.

BTW, cyberfb.c (S3 Trio64) was recently enhanced for this. Currently not yet in
Linus tree though. But it's in the m68k tree. Ideally it should be merged with
S3Triofb.c too.

> Also, it would be very nice if the generic VGA fbcon driver had support
> for standard VGA graphics modes, e.g. 320x200@8bpp or 640x480@4bpp.
> Heck, planar 320x240 (aka Mode-X) would be cool as well :). (hint hint
> svgalib and ggi hackers :)

320x200x8 is doable, but 640x480x4 requires bank switching since the screen
image is >64 KB. Thus it would need special fbcon-* low level routines, and no
X.

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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