+extern int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv);
+extern void intel_ddi_pll_init(struct drm_device *dev);
+extern void intel_ddi_enable_pipe_func(struct drm_crtc *crtc);
+extern void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
+ enum transcoder cpu_transcoder);
+extern void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc);
+extern void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc);
+extern void intel_ddi_setup_hw_pll_state(struct drm_device *dev);
+extern bool intel_ddi_pll_mode_set(struct drm_crtc *crtc, int clock);
+extern void intel_ddi_pre_enable(struct intel_encoder *intel_encoder);
+extern void intel_ddi_post_disable(struct intel_encoder *intel_encoder);
+extern void intel_ddi_put_crtc_pll(struct drm_crtc *crtc);
+extern void intel_ddi_set_pipe_settings(struct drm_crtc *crtc);
+extern void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder);
+bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector);