On Mon, Mar 14, 2005 at 10:10:35PM +0800, Antonino A. Daplas wrote:
> BTW, I would guess that scrolling is slow in this driver.  Since this driver
> can do pan_display, If this: 
> 
> info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
> 
> is added somewhere before register_framebuffer(), and var->xres_virtual >
> var->xres, you might get a several-fold increase in scrolling speed (since
> scrolling mode will be SCROLL_PAN_REDRAW instead of SCROLL_REDRAW).
> 
This is interesting. When FBINFO_HWACCEL_YPAN was added to hitfb, it slowed
down scrolling by several orders of magnitude. Perhaps it was something
relating to how the pan_display was implemented, but it's definitely not
a general win for everyone..