u8 pipe_mask);
void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
u8 pipe_mask);
+u32 gen8_de_pipe_underrun_mask(struct drm_i915_private *dev_priv);
bool intel_crtc_get_vblank_timestamp(struct drm_crtc *crtc, int *max_error,
ktime_t *vblank_time, bool in_vblank_irq);