[Bug 85576] [BDW] i915.enable_ppgtt=0 causes graphical corruption

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85576

Rodrigo Vivi <rodrigo.vivi at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #5 from Rodrigo Vivi <rodrigo.vivi at gmail.com> ---
James, could you please try this?

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
b/drivers/gpu/drm/i915/i915_gem_gtt.c
index cb7adab..a82b8a7 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1911,7 +1911,7 @@ static void bdw_setup_private_ppat(struct
drm_i915_private *dev_priv)
 {
        uint64_t pat;

-       pat = GEN8_PPAT(0, GEN8_PPAT_WB | GEN8_PPAT_LLC)     | /* for normal
objects, no eLLC */
+       pat = GEN8_PPAT(0, GEN8_PPAT_UC)     | /* TEST for bug 85576 */

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