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SubjectRe: [Linux-fbdev-devel] [PATCH] fbdev fbgen cleanup
On Fri, Jan 18, 2002 at 09:20:47AM -0800, James Simmons wrote:
>
> > > On to the massive fbdev cleanup. The second patch requires the first
> > > patch. The first patch is the currcon one that I posted earlier. Every
> >
> > Mmm, what is the current status on all this.
>
> Right now the cleanup of the massive code duplication for the color map
> handling is happening. I have fbgen.c compiled in by default for every
> driver and I'm gradually moving everything over to it.

Ok, ...

> > How does the new fbdev api compare with ruby, is it the same thing or not,
>
> It pretty much is the same thing. The only difference will be hooks for
> fb_read and fb_write. Some framebuffers like the i810 or the epson 1385
> are not the run of the mill linear framebuffers. So they need special
> hooks. Also the addition of EDID/DDC and othe rrelated protocols. The
> third difference will be something that has been discussed in public with
> Scott from intel. At present most fbdev drivers reset the accel engine
> even when you do something like increasing the refresh rate. This is not
> needed. Most sane hardware has the timings seperate from the accel engine.
> Now change the color depth or resolution does effect it. So that will be
> cleared up.

Ok, ...

> > and how does the ruby tree compare with the -dj one ?
>
> I gradually placing the ruby stuff into the -dj tree. This way it gets
> more testing. Plus I can see what is really a bug in ruby. For example
> their is a nasty bug in the new console locking. So it has been removed
> from the dj tree. I need to break it up more and slowly put it into place.
> This way I can see what the problem is.

Ok, ...

> > And what is the current status of fbdev in 2.5.x ? 2.5.1 + ruby hang my box
> > early in the boot process, but that is probably because pm3fb is not working
> > yet for ruby. Does matroxfb work ? i have an older pci matrox board that i
> > could install to test and do some pm3fb work if needed (and if i get the time
> > for it :(((0
>
> Only a hand full of drivers have truly been converted over in the console
> CVS. The hanging is most likely due to the new console lock. I have
> decided that the ruby tree will be used for code deposting and the DJ tree
> will be the real testing ground.

Mmm, ...

So what is the best place to look at if one wants to do some driver work. Not
that i really have that much time, but i may look into porting the pm3fb
driver to the new scheme, but ruby + 2.5.1 hangs hopelessly for me, and if it
is not the latest stuff around, it would not be the best place to work from.

Also, i suppose there is no documentation whatsoever yet, apart from the
source and the mailing list archive here ?

Friendly,

Sven Luther
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