Revert "drm/i915/bdw: Limit GTT to 2GB"

This reverts commit 0b456decc725b077baf0bf59f8f37803c07ac235.

Now that the code is fixed to use smaller allocations, it should be safe
to let the full GGTT be used on BDW.

The testcase for this is anything which uses more than half of the GTT,
thus eclipsing the old limit.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 862ae371697a6ea1746c0c5abc2b1f13a8d1b90d..faa0319b8e46524688da8dcc62b0bb64fc8532bf 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1725,11 +1725,6 @@ static inline unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl)
        bdw_gmch_ctl &= BDW_GMCH_GGMS_MASK;
        if (bdw_gmch_ctl)
                bdw_gmch_ctl = 1 << bdw_gmch_ctl;
-       if (bdw_gmch_ctl > 4) {
-               WARN_ON(!i915.preliminary_hw_support);
-               return 4<<20;
-       }
-
        return bdw_gmch_ctl << 20;
 }