Re: pm3fb (was: pm2fb driver)

[Petr V. <VAN...@vc...>]

On  5 Nov 01 at 12:15, James Simmons wrote:
> > > As for the struct fb_var_screeninfo we can do what I show in skeletonfb.c:
> > 
> > I think I'll wait until I can get first ruby then offb or matroxfb
> > to work on pm3fb (I have an old millenium next to the pm3 now) ; I
> > can't test anything right now...
> 
> Okay. So ruby first with offb, matrox. The matrox will be alot of work.
> Since it would be best to run the card in DMA mode it might be better to
> write a whole new driver. 

Please do some test of speed before you start coding. Last time I played 
with DMA it was much slower than using Matrox command queue, and older 
chips do not do DMA at all, so you must still keep old code somewhere
around.

Except rectangle fill (which happens rarely) and large bitblt (which
also happens rarely if you are using yres != vyres) all other
commands are completed before you can even check accelerator state
on G4x0/G550 hardware.
                                            Best regards,
                                                Petr Vandrovec
                                                van...@vc...