From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> BSpec tells us that the entire MI_DISPLAY_FLIP packet must be contained within a single cacheline on IVB. This series achieves that. Changes since my original patch [1]: * Move the logic into a new intel_ring_begin_cacheline_safe() function (as suggested by Daniel). * Actually handle the case when the ring would wrap due to the extra dwords. With the original patch, the MI_DISPLAY_FLIP packet might still end up straddling two cachelines in this case. [1] https://bugs.freedesktop.org/show_bug.cgi?id=74053#c8 Ville Syrjälä (3): drm/i915: Rework ring wrap detection drm/i915: Introduce intel_ring_begin_cacheline_safe() drm/i915: Prevent MI_DISPLAY_FLIP straddling two cachelines on IVB drivers/gpu/drm/i915/intel_display.c | 12 +++-- drivers/gpu/drm/i915/intel_ringbuffer.c | 88 ++++++++++++++++++++++++++++++--- drivers/gpu/drm/i915/intel_ringbuffer.h | 5 ++ 3 files changed, 96 insertions(+), 9 deletions(-) -- 1.8.3.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
