Hi Thierry,
On 20 January 2016 at 07:53, Thierry Reding thierry.reding@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 swarren@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_MASKon 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