diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 80843d9..2b91ac6 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -301,9 +301,6 @@ static const struct bxt_ddi_buf_trans bxt_ddi_translations_hdmi[] = {
 	{ 154, 0x9A, 1, 128, true },	/* 9:	1200		0   */
 };
 
-static void bxt_ddi_vswing_sequence(struct drm_device *dev, u32 level,
-				    enum port port, int type);
-
 static void ddi_get_encoder_port(struct intel_encoder *intel_encoder,
 				 struct intel_digital_port **dig_port,
 				 enum port *port)
@@ -2066,8 +2063,8 @@ void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc)
 			   TRANS_CLK_SEL_DISABLED);
 }
 
-static void skl_ddi_set_iboost(struct drm_device *dev, u32 level,
-			       enum port port, int type)
+void skl_ddi_set_iboost(struct drm_device *dev, u32 level,
+			enum port port, int type)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	const struct ddi_buf_trans *ddi_translations;
@@ -2123,8 +2120,8 @@ static void skl_ddi_set_iboost(struct drm_device *dev, u32 level,
 	I915_WRITE(DISPIO_CR_TX_BMU_CR0, reg);
 }
 
-static void bxt_ddi_vswing_sequence(struct drm_device *dev, u32 level,
-				    enum port port, int type)
+void bxt_ddi_vswing_sequence(struct drm_device *dev, u32 level,
+			     enum port port, int type)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	const struct bxt_ddi_buf_trans *ddi_translations;
@@ -2192,73 +2189,6 @@ static void bxt_ddi_vswing_sequence(struct drm_device *dev, u32 level,
 	I915_WRITE(BXT_PORT_PCS_DW10_GRP(port), val);
 }
 
-static uint32_t translate_signal_level(int signal_levels)
-{
-	uint32_t level;
-
-	switch (signal_levels) {
-	default:
-		DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level: 0x%x\n",
-			      signal_levels);
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
-		level = 0;
-		break;
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
-		level = 1;
-		break;
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
-		level = 2;
-		break;
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_3:
-		level = 3;
-		break;
-
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
-		level = 4;
-		break;
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
-		level = 5;
-		break;
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
-		level = 6;
-		break;
-
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
-		level = 7;
-		break;
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
-		level = 8;
-		break;
-
-	case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
-		level = 9;
-		break;
-	}
-
-	return level;
-}
-
-uint32_t ddi_signal_levels(struct intel_dp *intel_dp)
-{
-	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
-	struct drm_device *dev = dport->base.base.dev;
-	struct intel_encoder *encoder = &dport->base;
-	uint8_t train_set = intel_dp->train_set[0];
-	int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
-					 DP_TRAIN_PRE_EMPHASIS_MASK);
-	enum port port = dport->port;
-	uint32_t level;
-
-	level = translate_signal_level(signal_levels);
-
-	if (IS_SKYLAKE(dev))
-		skl_ddi_set_iboost(dev, level, port, encoder->type);
-	else if (IS_BROXTON(dev))
-		bxt_ddi_vswing_sequence(dev, level, port, encoder->type);
-
-	return DDI_BUF_TRANS_SELECT(level);
-}
-
 static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
diff --git a/drivers/gpu/drm/i915/intel_dp_signal_levels.c b/drivers/gpu/drm/i915/intel_dp_signal_levels.c
index a972d86..e8d11f4 100644
--- a/drivers/gpu/drm/i915/intel_dp_signal_levels.c
+++ b/drivers/gpu/drm/i915/intel_dp_signal_levels.c
@@ -23,10 +23,72 @@
 
 #include "intel_drv.h"
 
+static uint32_t ddi_translate_signal_level(uint8_t train_set)
+{
+	uint32_t level;
+
+	train_set &=
+		(DP_TRAIN_VOLTAGE_SWING_MASK | DP_TRAIN_PRE_EMPHASIS_MASK);
+
+	switch (train_set) {
+	default:
+		DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level: 0x%x\n",
+			      train_set);
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
+		level = 0;
+		break;
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
+		level = 1;
+		break;
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
+		level = 2;
+		break;
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_3:
+		level = 3;
+		break;
+
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
+		level = 4;
+		break;
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
+		level = 5;
+		break;
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
+		level = 6;
+		break;
+
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
+		level = 7;
+		break;
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
+		level = 8;
+		break;
+
+	case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
+		level = 9;
+		break;
+	}
+
+	return level;
+}
+
 static void
 hsw_set_signal_levels(struct intel_dp *intel_dp, uint8_t train_set)
 {
-	uint32_t signal_levels = ddi_signal_levels(intel_dp);
+	struct drm_device *dev = intel_dp_to_dev(intel_dp);
+	uint32_t ddi_level, signal_levels;
+
+	ddi_level = ddi_translate_signal_level(train_set);
+
+	if (IS_SKYLAKE(dev)) {
+		struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
+		struct intel_encoder *encoder = &dport->base;
+		enum port port = dport->port;
+
+		skl_ddi_set_iboost(dev, ddi_level, port, encoder->type);
+	}
+
+	signal_levels = DDI_BUF_TRANS_SELECT(ddi_level);
 
 	DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels);
 
@@ -61,7 +123,14 @@ static const struct signal_levels skl_edp_low_vswing_signal_levels = {
 static void
 bxt_set_signal_levels(struct intel_dp *intel_dp, uint8_t train_set)
 {
-	ddi_signal_levels(intel_dp);
+	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
+	struct drm_device *dev = dport->base.base.dev;
+	struct intel_encoder *encoder = &dport->base;
+	enum port port = dport->port;
+	uint32_t level;
+
+	level = ddi_translate_signal_level(train_set);
+	bxt_ddi_vswing_sequence(dev, level, port, encoder->type);
 }
 
 static const struct signal_levels bxt_signal_levels = {
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index e00ce6c..6f33a8b 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1020,7 +1020,11 @@ void intel_ddi_init_dp_buf_reg(struct intel_encoder *encoder);
 void intel_ddi_clock_get(struct intel_encoder *encoder,
 			 struct intel_crtc_state *pipe_config);
 void intel_ddi_set_vc_payload_alloc(struct drm_crtc *crtc, bool state);
-uint32_t ddi_signal_levels(struct intel_dp *intel_dp);
+
+void skl_ddi_set_iboost(struct drm_device *dev, u32 level,
+			enum port port, int type);
+void bxt_ddi_vswing_sequence(struct drm_device *dev, u32 level,
+			     enum port port, int type);
 
 /* intel_frontbuffer.c */
 void intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
