-----Original Message----- From: Chris Wilson [mailto:chris@xxxxxxxxxxxxxxxxxx] Sent: Thursday, June 18, 2015 8:42 AM To: Daniel Vetter Cc: Antoine, Peter; intel-gfx@xxxxxxxxxxxxxxxxxxxxx Subject: Re: [PATCH v4] drm/i915 : Added Programming of the MOCS On Thu, Jun 18, 2015 at 08:59:55AM +0200, Daniel Vetter wrote: > > + /* > > + * Failing to program the MOCS is non-fatal.The system will not > > + * run at peak performance. So generate a warning and carry on. > > + */ > > Is this really true? Userspace must make sure that they don't > inappropriately overwrite the caching settings using MOCS for > frontbuffers and in doing so causing coherency issues with the display > block. If we fail to program MOCS correctly then things won't look pretty. I was under the presumption that the MOCS entries would default to UC, since that is the failsafe mode. -Chris No they will stay at the hardware defaults as specified in the Bspec. Peter. -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
