drm/i915/vlv: disable PPGTT on early revs v3
Early revs didn't have PPGTT support, so disable there.
v2: add debug msg when disabling on early stepping
v3: enable on other B3 packages as well (untested) (Ville)
References: https://bugs.freedesktop.org/show_bug.cgi?id=79669
References: https://bugs.freedesktop.org/show_bug.cgi?id=79670
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
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 eec820a..6f5d5a1 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -63,6 +63,12 @@
}
#endif
+ /* Early VLV doesn't have this */
+ if (IS_VALLEYVIEW(dev) && dev->pdev->revision < 0xb) {
+ DRM_DEBUG_DRIVER("disabling PPGTT on pre-B3 step VLV\n");
+ return 0;
+ }
+
return HAS_ALIASING_PPGTT(dev) ? 1 : 0;
}