From: "Hoath, Nicholas" <nicholas.hoath@xxxxxxxxx>
Add stepping check for WaDisableSDEUnitClockGating.
Signed-off-by: Nick Hoath <nicholas.hoath@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 2b89aac..06d67fd 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -56,12 +56,14 @@ static void gen9_init_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
- /*
- * WaDisableSDEUnitClockGating:skl
- * This seems to be a pre-production w/a.
- */
- I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
- GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
+ if (INTEL_REVID(dev) == SKL_A0_REVID) {
+ /*
+ * WaDisableSDEUnitClockGating:skl
+ * This seems to be a pre-production w/a.
+ */
+ I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
+ GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
+ }
/* Wa4x4STCOptimizationDisable:skl */
I915_WRITE(CACHE_MODE_1,
--
2.1.1
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