diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 45da78e..d2d70a8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4461,12 +4461,26 @@ void intel_init_clock_gating(struct drm_device *dev)
 			dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
 		I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
 	} else if (IS_I965GM(dev)) {
+		u32 dspclk_gate = OVFUNIT_CLOCK_GATE_DISABLE
+			| OVBUNIT_CLOCK_GATE_DISABLE		
+			| OVRUNIT_CLOCK_GATE_DISABLE
+			| OVCUNIT_CLOCK_GATE_DISABLE
+			| OVUUNIT_CLOCK_GATE_DISABLE
+			| OVLUNIT_CLOCK_GATE_DISABLE;
 		I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
 		I915_WRITE(RENCLK_GATE_D2, 0);
-		I915_WRITE(DSPCLK_GATE_D, 0);
+		I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
 		I915_WRITE(RAMCLK_GATE_D, 0);
 		I915_WRITE16(DEUC, 0);
 	} else if (IS_I965G(dev)) {
+		u32 dspclk_gate =  I915_READ(DSPCLK_GATE_D);
+		dspclk_gate |= OVFUNIT_CLOCK_GATE_DISABLE
+			| OVBUNIT_CLOCK_GATE_DISABLE		
+			| OVRUNIT_CLOCK_GATE_DISABLE
+			| OVCUNIT_CLOCK_GATE_DISABLE
+			| OVUUNIT_CLOCK_GATE_DISABLE
+			| OVLUNIT_CLOCK_GATE_DISABLE;
+		I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
 		I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
 		       I965_RCC_CLOCK_GATE_DISABLE |
 		       I965_RCPB_CLOCK_GATE_DISABLE |