Quoting Ville Syrjälä (2017-10-27 12:27:59) > On Fri, Oct 27, 2017 at 12:56:39AM +0100, Chris Wilson wrote: > > An interesting snippet from Sandybridge's prm: > > > > "Although a Ring Buffer can be enabled in the non-empty state, it must > > not be disabled unless it is empty. Attempting to disable a Ring Buffer > > in the non-empty state is UNDEFINED." > > However elsewhere it still says: > "Writing the Head Offset while the RB is enabled is UNDEFINED" > and > "It can be enabled or disabled regardless of whether there > are valid instructions pending."
Nothing like a catch 22. Let's just reset the GPU first... -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
