4e41f3ac73
The ILK/SNB docs don't really mention the the DPFC_HT_MODIFY bit. CTG docs clearly state that it should be set only when tracking back buffer modification in persistent mode. The bit is supposed to be set by software after the first CPU modification to the back buffer, and it would get automagically cleared by the hardware on the next page flip. Since we only track front buffer modification we don't need to set this bit. GTT modification tracking still appears to work on ILK and SNB with the bit unset. I don't have a CTG to verify how that behaves. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> |
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