diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index adf208fc6a2d3d80bd2c63afccd91038304148fe..b7fa1fa7d669f9f2811aa9f4847189c1b3b20cb0 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -7838,6 +7838,7 @@ int sandybridge_pcode_write(struct drm_i915_private *dev_priv,
 	}
 
 	I915_WRITE_FW(GEN6_PCODE_DATA, val);
+	I915_WRITE_FW(GEN6_PCODE_DATA1, 0);
 	I915_WRITE_FW(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
 
 	if (intel_wait_for_register_fw(dev_priv,