Re: [Linux-fbdev-devel] [PATCH] pm2fb: fb_sync added

[Antonino A. D. <ad...@gm...>]

On Tue, 2007-05-08 at 15:05 +0200, Krzysztof Helt wrote:
> Dnia 8-05-2007 o godz. 14:32 Antonino A. Daplas napisał(a):
> > On Tue, 2007-05-08 at 09:26 +0200, Krzysztof Helt wrote:
> 
> I see a major problem with using copyarea acceleration comparing
> to redraw function. The copyarea always moves the whole
> framebuffer (milions of pixels) while the redraw works very smart
> to redraw only things which has to be redrawn. I am working to
> use something smarter for copyarea. No success yet.
> 

Are you using just plain move and redraw?  How about trying pan + move,
or pan + redraw.  If you can set var->yres_virtual to be at least 2x
var->yres, it might improve scrolling speed a lot.

Tony