dlfb_handle_damage
dlfb_handle_damage(dlfb, 0, 0, info->var.xres, info->var.yres);
dlfb_handle_damage(dlfb, 0, start, info->var.xres, lines);
dlfb_handle_damage(dlfb, x, y, x2 - x, y2 - y);
dlfb_handle_damage(dlfb, area.x, area.y, area.w, area.h);