diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f4c2db458ddce5fcd503b5e9912fa85f571eddc1..54691bcf1822c0dc53c2a4ba5ad7372b73d719e6 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2298,8 +2298,6 @@ __printf(3, 4)
 void i915_handle_error(struct drm_device *dev, bool wedged,
 		       const char *fmt, ...);
 
-void gen6_set_pm_mask(struct drm_i915_private *dev_priv, u32 pm_iir,
-							int new_delay);
 extern void intel_irq_init(struct drm_i915_private *dev_priv);
 extern void intel_hpd_init(struct drm_i915_private *dev_priv);
 int intel_irq_install(struct drm_i915_private *dev_priv);