drm/i915: Drop WaDisableRCZUnitClockGating:hsw

WaDisableRCZUnitClockGating was needed with early HSW steppings only.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 35e4bbbd6b0f04240697f00c9630beb5de896cce..15815bd2bb67ecd11085886324408c134a5aeae8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4765,11 +4765,6 @@ static void haswell_init_clock_gating(struct drm_device *dev)
 
        ilk_init_lp_watermarks(dev);
 
-       /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
-        * This implements the WaDisableRCZUnitClockGating:hsw workaround.
-        */
-       I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
-
        /* WaApplyL3ControlAndL3ChickenMode:hsw */
        I915_WRITE(GEN7_L3CNTLREG1,
                        GEN7_WA_FOR_GEN7_L3_CONTROL);