<tt>Alan Cox <alan@linux.intel.com> Wrote 2016/09/07 05:16:49: > Alan Cox <alan@linux.intel.com> </tt> <tt>> 2016/09/07 05:16</tt> <tt>> Re: [RFC] drm/gma500: add virtual mapping support for fbdev.</tt> <tt>> > On Tue, 2016-09-06 at 19:28 +0800, jiang.biao2@zte.com.cn wrote: > > Hi, > > > > I found current gma500 fbdev driver does not support the virtual > > mapping for the fb pages, instead it only uses stolen pages and > > supports high resolution console by reducing the color depth. It > > works well with fbcon for high resolution envirnment. > > The text mode console code can't support a non-linear mapping and > trying to grab one used most or all of the vmalloc address space on a > 32bit box (and most of those systems are only able to run 32bit). > > For the sake of a bootscreen loader (which could use DRM directly > instead if it needed high resolution) it didn't seem worht it. > > Either way it's not IMHO a good idea for 32bit, 64bit maybe. > > Alan > </tt> <tt>In addition to plymouth, one of our own app is using the fbdev </tt> <tt>directly too, so encounter the problem. Maybe it should also use DRM.</tt> <tt>Thanks for you reply. </tt>