f85da868e3
CTG/ILK/SNB/IVB support 4kx2k surfaces. HSW supports 4kx4k, but without proper front buffer invalidation on the last 2k lines, so don't enable FBC on these cases for now. v2: Use gen >= 5, not gen > 4 (Daniel). Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>