drm/i915/skl: Implement WaDisableVFUnitClockGating

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d76d6ab3775f..67e1e61c50e7 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -75,6 +75,10 @@ static void skl_init_clock_gating(struct drm_device *dev)
                 I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
                            GEN8_GAPSUNIT_CLOCK_GATE_DISABLE |
                            GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
+
+                /* WaDisableVFUnitClockGating:skl */
+                I915_WRITE(GEN6_UCGCTL2, I915_READ(GEN6_UCGCTL2) |
+                           GEN6_VFUNIT_CLOCK_GATE_DISABLE);
         }
 
         if (INTEL_REVID(dev) <= SKL_REVID_D0) {