diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 6a5dbeed369418fcf94608bb598b07a3d351ec0d..358c9d598e6dfacce37af980ff5d79cb5824c6b3 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3350,7 +3350,6 @@ extern void intel_set_rps(struct drm_device *dev, u8 val);
 extern void intel_set_memory_cxsr(struct drm_i915_private *dev_priv,
 				  bool enable);
 extern void intel_detect_pch(struct drm_device *dev);
-extern int intel_trans_dp_port_sel(struct drm_crtc *crtc);
 extern int intel_enable_rc6(const struct drm_device *dev);
 
 extern bool i915_semaphore_is_enabled(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 570bebe11784c56cc6c58874671cc6c920914d1b..7e7588b6f076b91c0df62af60f3dd86309452552 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4078,6 +4078,22 @@ static void ivybridge_update_fdi_bc_bifurcation(struct intel_crtc *intel_crtc)
 	}
 }
 
+/* Return which DP Port should be selected for Transcoder DP control */
+static enum port
+intel_trans_dp_port_sel(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct intel_encoder *encoder;
+
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		if (encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
+		    encoder->type == INTEL_OUTPUT_EDP)
+			return enc_to_dig_port(&encoder->base)->port;
+	}
+
+	return -1;
+}
+
 /*
  * Enable PCH resources required for PCH ports:
  *   - PCH PLLs
@@ -4156,13 +4172,13 @@ static void ironlake_pch_enable(struct drm_crtc *crtc)
 			temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
 
 		switch (intel_trans_dp_port_sel(crtc)) {
-		case PCH_DP_B:
+		case PORT_B:
 			temp |= TRANS_DP_PORT_SEL_B;
 			break;
-		case PCH_DP_C:
+		case PORT_C:
 			temp |= TRANS_DP_PORT_SEL_C;
 			break;
-		case PCH_DP_D:
+		case PORT_D:
 			temp |= TRANS_DP_PORT_SEL_D;
 			break;
 		default:
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6c17b0b455da46efa213b857764004b477500ce1..9d7dd43e8aa4aa42d29f63ca68b1d35455fb8cc5 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5063,25 +5063,6 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
 	return ret;
 }
 
-/* Return which DP Port should be selected for Transcoder DP control */
-int
-intel_trans_dp_port_sel(struct drm_crtc *crtc)
-{
-	struct drm_device *dev = crtc->dev;
-	struct intel_encoder *intel_encoder;
-	struct intel_dp *intel_dp;
-
-	for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
-		intel_dp = enc_to_intel_dp(&intel_encoder->base);
-
-		if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
-		    intel_encoder->type == INTEL_OUTPUT_EDP)
-			return intel_dp->output_reg;
-	}
-
-	return -1;
-}
-
 /* check the VBT to see whether the eDP is on another port */
 bool intel_dp_is_edp(struct drm_device *dev, enum port port)
 {