diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 7b03ec571464..558cf13b977f 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -53,6 +53,24 @@
 #include "intel_vdsc.h"
 #include "skl_scaler.h"
 
+/* From fake MST encoder to primary encoder */
+static struct intel_encoder *to_primary_encoder(struct intel_encoder *encoder)
+{
+	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
+	struct intel_digital_port *dig_port = intel_mst->primary;
+
+	return &dig_port->base;
+}
+
+/* From fake MST encoder to primary DP */
+static struct intel_dp *to_primary_dp(struct intel_encoder *encoder)
+{
+	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
+	struct intel_digital_port *dig_port = intel_mst->primary;
+
+	return &dig_port->dp;
+}
+
 static int intel_dp_mst_max_dpt_bpp(const struct intel_crtc_state *crtc_state,
 				    bool dsc)
 {
@@ -171,8 +189,7 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder,
 						bool dsc)
 {
 	struct drm_atomic_state *state = crtc_state->uapi.state;
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_dp *intel_dp = &intel_mst->primary->dp;
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 	struct drm_dp_mst_topology_state *mst_state;
 	struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
@@ -422,8 +439,7 @@ static int intel_dp_mst_update_slots(struct intel_encoder *encoder,
 				     struct drm_connector_state *conn_state)
 {
 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_dp *intel_dp = &intel_mst->primary->dp;
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 	struct drm_dp_mst_topology_mgr *mgr = &intel_dp->mst_mgr;
 	struct drm_dp_mst_topology_state *topology_state;
 	u8 link_coding_cap = intel_dp_is_uhbr(crtc_state) ?
@@ -581,8 +597,7 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state);
 	struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_dp *intel_dp = &intel_mst->primary->dp;
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 	struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
 	const struct drm_display_mode *adjusted_mode =
@@ -855,8 +870,7 @@ static int intel_dp_mst_compute_config_late(struct intel_encoder *encoder,
 					    struct drm_connector_state *conn_state)
 {
 	struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state);
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_dp *intel_dp = &intel_mst->primary->dp;
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 
 	/* lowest numbered transcoder will be designated master */
 	crtc_state->mst_master_transcoder =
@@ -970,8 +984,7 @@ static void wait_for_act_sent(struct intel_encoder *encoder,
 			      const struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_dp *intel_dp = &intel_mst->primary->dp;
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 
 	if (intel_de_wait_for_set(i915, dp_tp_status_reg(encoder, crtc_state),
 				  DP_TP_STATUS_ACT_SENT, 1))
@@ -986,8 +999,7 @@ static void intel_mst_disable_dp(struct intel_atomic_state *state,
 				 const struct drm_connector_state *old_conn_state)
 {
 	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_digital_port *dig_port = intel_mst->primary;
-	struct intel_dp *intel_dp = &dig_port->dp;
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 	struct intel_connector *connector =
 		to_intel_connector(old_conn_state->connector);
 	struct drm_i915_private *i915 = to_i915(connector->base.dev);
@@ -1010,8 +1022,8 @@ static void intel_mst_post_disable_dp(struct intel_atomic_state *state,
 {
 	struct intel_display *display = to_intel_display(encoder);
 	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_digital_port *dig_port = intel_mst->primary;
-	struct intel_dp *intel_dp = &dig_port->dp;
+	struct intel_encoder *primary_encoder = to_primary_encoder(encoder);
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 	struct intel_connector *connector =
 		to_intel_connector(old_conn_state->connector);
 	struct drm_dp_mst_topology_state *old_mst_state =
@@ -1080,8 +1092,7 @@ static void intel_mst_post_disable_dp(struct intel_atomic_state *state,
 	 * BSpec 4287: disable DIP after the transcoder is disabled and before
 	 * the transcoder clock select is set to none.
 	 */
-	intel_dp_set_infoframes(&dig_port->base, false,
-				old_crtc_state, NULL);
+	intel_dp_set_infoframes(primary_encoder, false, old_crtc_state, NULL);
 	/*
 	 * From TGL spec: "If multi-stream slave transcoder: Configure
 	 * Transcoder Clock Select to direct no clock to the transcoder"
@@ -1095,8 +1106,8 @@ static void intel_mst_post_disable_dp(struct intel_atomic_state *state,
 
 	intel_mst->connector = NULL;
 	if (last_mst_stream)
-		dig_port->base.post_disable(state, &dig_port->base,
-						  old_crtc_state, NULL);
+		primary_encoder->post_disable(state, primary_encoder,
+					      old_crtc_state, NULL);
 
 	drm_dbg_kms(&dev_priv->drm, "active links %d\n",
 		    intel_dp->active_mst_links);
@@ -1107,13 +1118,12 @@ static void intel_mst_post_pll_disable_dp(struct intel_atomic_state *state,
 					  const struct intel_crtc_state *old_crtc_state,
 					  const struct drm_connector_state *old_conn_state)
 {
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_digital_port *dig_port = intel_mst->primary;
-	struct intel_dp *intel_dp = &dig_port->dp;
+	struct intel_encoder *primary_encoder = to_primary_encoder(encoder);
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 
 	if (intel_dp->active_mst_links == 0 &&
-	    dig_port->base.post_pll_disable)
-		dig_port->base.post_pll_disable(state, &dig_port->base, old_crtc_state, old_conn_state);
+	    primary_encoder->post_pll_disable)
+		primary_encoder->post_pll_disable(state, primary_encoder, old_crtc_state, old_conn_state);
 }
 
 static void intel_mst_pre_pll_enable_dp(struct intel_atomic_state *state,
@@ -1121,19 +1131,18 @@ static void intel_mst_pre_pll_enable_dp(struct intel_atomic_state *state,
 					const struct intel_crtc_state *pipe_config,
 					const struct drm_connector_state *conn_state)
 {
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_digital_port *dig_port = intel_mst->primary;
-	struct intel_dp *intel_dp = &dig_port->dp;
+	struct intel_encoder *primary_encoder = to_primary_encoder(encoder);
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 
 	if (intel_dp->active_mst_links == 0)
-		dig_port->base.pre_pll_enable(state, &dig_port->base,
-						    pipe_config, NULL);
+		primary_encoder->pre_pll_enable(state, primary_encoder,
+						pipe_config, NULL);
 	else
 		/*
 		 * The port PLL state needs to get updated for secondary
 		 * streams as for the primary stream.
 		 */
-		intel_ddi_update_active_dpll(state, &dig_port->base,
+		intel_ddi_update_active_dpll(state, primary_encoder,
 					     to_intel_crtc(pipe_config->uapi.crtc));
 }
 
@@ -1170,8 +1179,8 @@ static void intel_mst_pre_enable_dp(struct intel_atomic_state *state,
 				    const struct drm_connector_state *conn_state)
 {
 	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_digital_port *dig_port = intel_mst->primary;
-	struct intel_dp *intel_dp = &dig_port->dp;
+	struct intel_encoder *primary_encoder = to_primary_encoder(encoder);
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
@@ -1201,8 +1210,8 @@ static void intel_mst_pre_enable_dp(struct intel_atomic_state *state,
 	intel_dp_sink_enable_decompression(state, connector, pipe_config);
 
 	if (first_mst_stream) {
-		dig_port->base.pre_enable(state, &dig_port->base,
-						pipe_config, NULL);
+		primary_encoder->pre_enable(state, primary_encoder,
+					    pipe_config, NULL);
 
 		intel_mst_reprobe_topology(intel_dp, pipe_config);
 	}
@@ -1212,11 +1221,11 @@ static void intel_mst_pre_enable_dp(struct intel_atomic_state *state,
 	ret = drm_dp_add_payload_part1(&intel_dp->mst_mgr, mst_state,
 				       drm_atomic_get_mst_payload_state(mst_state, connector->port));
 	if (ret < 0)
-		intel_dp_queue_modeset_retry_for_link(state, &dig_port->base, pipe_config);
+		intel_dp_queue_modeset_retry_for_link(state, primary_encoder, pipe_config);
 
 	/*
 	 * Before Gen 12 this is not done as part of
-	 * dig_port->base.pre_enable() and should be done here. For
+	 * primary_encoder->pre_enable() and should be done here. For
 	 * Gen 12+ the step in which this should be done is different for the
 	 * first MST stream, so it's done on the DDI for the first stream and
 	 * here for the following ones.
@@ -1227,7 +1236,7 @@ static void intel_mst_pre_enable_dp(struct intel_atomic_state *state,
 	if (DISPLAY_VER(dev_priv) >= 13 && !first_mst_stream)
 		intel_ddi_config_transcoder_func(encoder, pipe_config);
 
-	intel_dsc_dp_pps_write(&dig_port->base, pipe_config);
+	intel_dsc_dp_pps_write(primary_encoder, pipe_config);
 	intel_ddi_set_dp_msa(pipe_config, conn_state);
 }
 
@@ -1270,9 +1279,8 @@ static void intel_mst_enable_dp(struct intel_atomic_state *state,
 				const struct drm_connector_state *conn_state)
 {
 	struct intel_display *display = to_intel_display(encoder);
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_digital_port *dig_port = intel_mst->primary;
-	struct intel_dp *intel_dp = &dig_port->dp;
+	struct intel_encoder *primary_encoder = to_primary_encoder(encoder);
+	struct intel_dp *intel_dp = to_primary_dp(encoder);
 	struct intel_connector *connector = to_intel_connector(conn_state->connector);
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct drm_dp_mst_topology_state *mst_state =
@@ -1316,7 +1324,7 @@ static void intel_mst_enable_dp(struct intel_atomic_state *state,
 				       drm_atomic_get_mst_payload_state(mst_state,
 									connector->port));
 	if (ret < 0)
-		intel_dp_queue_modeset_retry_for_link(state, &dig_port->base, pipe_config);
+		intel_dp_queue_modeset_retry_for_link(state, primary_encoder, pipe_config);
 
 	if (DISPLAY_VER(dev_priv) >= 12)
 		intel_de_rmw(dev_priv, hsw_chicken_trans_reg(dev_priv, trans),
@@ -1350,19 +1358,17 @@ static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 					struct intel_crtc_state *pipe_config)
 {
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_digital_port *dig_port = intel_mst->primary;
+	struct intel_encoder *primary_encoder = to_primary_encoder(encoder);
 
-	dig_port->base.get_config(&dig_port->base, pipe_config);
+	primary_encoder->get_config(primary_encoder, pipe_config);
 }
 
 static bool intel_dp_mst_initial_fastset_check(struct intel_encoder *encoder,
 					       struct intel_crtc_state *crtc_state)
 {
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_digital_port *dig_port = intel_mst->primary;
+	struct intel_encoder *primary_encoder = to_primary_encoder(encoder);
 
-	return intel_dp_initial_fastset_check(&dig_port->base, crtc_state);
+	return intel_dp_initial_fastset_check(primary_encoder, crtc_state);
 }
 
 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
