int xxxfb_set_par (struct fb_info * info);
Using the fb_var_screeninfo in fb_info we set the resolution of the this particular framebuffer. This function alters the par AND the fb_fix_screeninfo stored in fb_info. It doesn't not alter var in fb_info since we are using that data. This means we depend on the data in var inside fb_info to be supported by the hardware. xxxfb_check_var is always called before xxxfb_set_par to ensure this. Again if you can't can't the resolution you don't need this function.