tree 254bb8ae056ee88115c6e6fb54b8fcf5aa683ded
parent b33ecdd1cdeb90ca07dd28d648558e87c8680443
author Ville Syrjälä <ville.syrjala@linux.intel.com> 1385062185 +0200
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1385368998 +0100

drm/i915: Don't set the fence number in DPFC_CTL on SNB

SNB has another register where the actual FBC CPU fence number is
stored. The documenation explicitly states that the fence number
in DPFC_CTL must be 0 on SNB. And in fact when it's not zero,
the GTT tracking simply doesn't work.

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>