Re: ioremap problem on highmem

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Thu, 2003-10-16 at 01:17, James Simmons wrote:
> > My main motivation for this is to have a single driver controlling the 
> > graphics hardware on DRI supported systems. This will eliminate the problem 
> > with saving hardware state between VT's. 
> 
> Unless you disable the VT console system you still have to to deal with 
> switching from KDTEXT to KDGRAPHICS and back again. Its also userlands 
> responiblity to save the console state and restore it.

Which is a bit hellish... I would love a callback "restore" (or maybe
just a set_par with a "force" attribute bypassing check of old par !=
new par that most drivers have that gets called on switch back from
KDGRAPHICS to KDTEXT. In my experience, this is the only way to get
things back properly after XFree with radeons.

XFree _could_ probably be fixed, but it's a bit difficult, especially
saving & restoring the entire 2D accel state, and you know how long it
would take for an xfree fix to get in, while it's so easy for radeonfb
to just put back its own settings...




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