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..