diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 2d3cc82dd8a4..b3f1748fab97 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -558,8 +558,10 @@ void intel_prepare_ddi(struct drm_device *dev)
 		enum port port;
 		bool supports_hdmi;
 
-		ddi_get_encoder_port(intel_encoder, &intel_dig_port, &port);
+		if (intel_encoder->type == INTEL_OUTPUT_DSI)
+			continue;
 
+		ddi_get_encoder_port(intel_encoder, &intel_dig_port, &port);
 		if (visited[port])
 			continue;
 
@@ -2043,7 +2045,8 @@ bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
 void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc)
 {
 	struct drm_crtc *crtc = &intel_crtc->base;
-	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
 	enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bbeb6d3aca1e..539c3737e823 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4965,6 +4965,7 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
 	int pipe = intel_crtc->pipe, hsw_workaround_pipe;
 	struct intel_crtc_state *pipe_config =
 		to_intel_crtc_state(crtc->state);
+	bool is_dsi = intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DSI);
 
 	if (WARN_ON(intel_crtc->active))
 		return;
@@ -4994,9 +4995,12 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
 	intel_crtc->active = true;
 
 	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
-	for_each_encoder_on_crtc(dev, crtc, encoder)
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		if (encoder->pre_pll_enable)
+			encoder->pre_pll_enable(encoder);
 		if (encoder->pre_enable)
 			encoder->pre_enable(encoder);
+	}
 
 	if (intel_crtc->config->has_pch_encoder) {
 		intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
@@ -5004,7 +5008,8 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
 		dev_priv->display.fdi_link_train(crtc);
 	}
 
-	intel_ddi_enable_pipe_clock(intel_crtc);
+	if (!is_dsi)
+		intel_ddi_enable_pipe_clock(intel_crtc);
 
 	if (INTEL_INFO(dev)->gen >= 9)
 		skylake_pfit_enable(intel_crtc);
@@ -5018,7 +5023,8 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
 	intel_crtc_load_lut(crtc);
 
 	intel_ddi_set_pipe_settings(crtc);
-	intel_ddi_enable_transcoder_func(crtc);
+	if (!is_dsi)
+		intel_ddi_enable_transcoder_func(crtc);
 
 	intel_update_watermarks(crtc);
 	intel_enable_pipe(intel_crtc);
@@ -5026,7 +5032,7 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
 	if (intel_crtc->config->has_pch_encoder)
 		lpt_pch_enable(crtc);
 
-	if (intel_crtc->config->dp_encoder_is_mst)
+	if (intel_crtc->config->dp_encoder_is_mst && !is_dsi)
 		intel_ddi_set_vc_payload_alloc(crtc, true);
 
 	assert_vblank_disabled(crtc);
@@ -5119,6 +5125,7 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_encoder *encoder;
 	enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
+	bool is_dsi = intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DSI);
 
 	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		intel_opregion_notify_encoder(encoder, false);
@@ -5136,14 +5143,16 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
 	if (intel_crtc->config->dp_encoder_is_mst)
 		intel_ddi_set_vc_payload_alloc(crtc, false);
 
-	intel_ddi_disable_transcoder_func(dev_priv, cpu_transcoder);
+	if (!is_dsi)
+		intel_ddi_disable_transcoder_func(dev_priv, cpu_transcoder);
 
 	if (INTEL_INFO(dev)->gen >= 9)
 		skylake_scaler_disable(intel_crtc);
 	else
 		ironlake_pfit_disable(intel_crtc, false);
 
-	intel_ddi_disable_pipe_clock(intel_crtc);
+	if (!is_dsi)
+		intel_ddi_disable_pipe_clock(intel_crtc);
 
 	if (intel_crtc->config->has_pch_encoder) {
 		lpt_disable_pch_transcoder(dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index cb1c65739425..b706b4e750da 100644
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -341,8 +341,12 @@ int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
 	if (!HAS_DDI(dev))
 		return 0;
 
-	port = intel_ddi_get_encoder_port(intel_encoder);
-	if (port == PORT_E) {
+	if (intel_encoder->type == INTEL_OUTPUT_DSI)
+		port = 0;
+	else
+		port = intel_ddi_get_encoder_port(intel_encoder);
+
+	if (port == PORT_E)  {
 		port = 0;
 	} else {
 		parm |= 1 << port;
@@ -363,6 +367,7 @@ int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
 		type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
 		break;
 	case INTEL_OUTPUT_EDP:
+	case INTEL_OUTPUT_DSI:
 		type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
 		break;
 	default: