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@@ -4416,7 +4416,10 @@ static void ironlake_init_clock_gating(struct drm_device *dev)
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struct drm_i915_private *dev_priv = dev->dev_private;
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uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
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- /* Required for FBC */
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+ /*
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+ * Required for FBC
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+ * WaFbcDisableDpfcClockGating:ilk
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+ */
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dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
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ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
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ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
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