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Damien Lespiau committed a9627b88168
drm/i915: Remove the WaDisableBackToBackFlipFix w/a for Haswell This workaround is only valid for IVB and VLV and the write triggers an error on HSW. Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Paulo Zanoni <paulo.r.zanonI@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>