Hi Thierry, On 20 January 2016 at 07:53, Thierry Reding <thierry.red...@gmail.com> wrote: > On Mon, Jan 18, 2016 at 01:07:10PM -0700, Stephen Warren wrote: >> On 01/14/2016 01:26 PM, Simon Glass wrote: >> >This seems to give the best performance, so let's use it always. >> >> I thought we chose the current cache mode due to display corruption issues >> with other modes, but I tested a change that I believe does the same as this >> change on Seaboard without any apparent issue so, >> >> Acked-by: Stephen Warren <swar...@nvidia.com> > > I think for framebuffers the best option is still write-combine, which > would be something like: > > DCACHE_WRITECOMBINE = DCACHE_OFF | TTB_SECT_B_MASK > > on ARM v7. Did you ever benchmark that against DCACHE_WRITETHROUGH? It > should be faster provided that you never read from the region.
This is noticeably slower in my experience. Reading from the region is pretty common - e.g. scrolling. Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
