diff --git a/[refs] b/[refs]
index fe256a5e75b5..ffb9772db903 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 895692befab73fd399d854c7db41d6d7260af2da
+refs/heads/master: 298b0b392c750137f148fda056a7d4c42019814c
diff --git a/trunk/drivers/gpu/drm/i915/intel_dp.c b/trunk/drivers/gpu/drm/i915/intel_dp.c
index ada7319f0eaf..128c2fefd541 100644
--- a/trunk/drivers/gpu/drm/i915/intel_dp.c
+++ b/trunk/drivers/gpu/drm/i915/intel_dp.c
@@ -891,8 +891,10 @@ static void ironlake_edp_pll_on(struct drm_encoder *encoder)
 
 	DRM_DEBUG_KMS("\n");
 	dpa_ctl = I915_READ(DP_A);
-	dpa_ctl &= ~DP_PLL_ENABLE;
+	dpa_ctl |= DP_PLL_ENABLE;
 	I915_WRITE(DP_A, dpa_ctl);
+	POSTING_READ(DP_A);
+	udelay(200);
 }
 
 static void ironlake_edp_pll_off(struct drm_encoder *encoder)
@@ -902,7 +904,7 @@ static void ironlake_edp_pll_off(struct drm_encoder *encoder)
 	u32 dpa_ctl;
 
 	dpa_ctl = I915_READ(DP_A);
-	dpa_ctl |= DP_PLL_ENABLE;
+	dpa_ctl &= ~DP_PLL_ENABLE;
 	I915_WRITE(DP_A, dpa_ctl);
 	POSTING_READ(DP_A);
 	udelay(200);