drm/i915/skl: Implement WaDisableLSQCROPERFforOCL

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Nick Hoath <nicholas.hoath@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index af8dca28c505..d7750176091b 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -65,6 +65,11 @@ static void skl_init_clock_gating(struct drm_device *dev)
                            GEN8_GAPSUNIT_CLOCK_GATE_DISABLE |
                            GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
         }
+
+        if (INTEL_REVID(dev) <= SKL_REVID_E0)
+                /* WaDisableLSQCROPERFforOCL:skl */
+                I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) |
+                           GEN8_LQSC_RO_PERF_DIS);
 }
 
 static void i915_pineview_get_mem_freq(struct drm_device *dev)