diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index be5bc506d4d3..f06c6dfec888 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -34,6 +34,7 @@
 #include "intel_ddi.h"
 #include "intel_display_types.h"
 #include "intel_dp.h"
+#include "intel_dp_mst.h"
 #include "intel_dp_link_training.h"
 #include "intel_dpio_phy.h"
 #include "intel_dsi.h"
@@ -1953,17 +1954,19 @@ void intel_ddi_disable_transcoder_func(const struct intel_crtc_state *crtc_state
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
-	i915_reg_t reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
-	u32 val = I915_READ(reg);
+	u32 val;
+
+	val = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
+	val &= ~TRANS_DDI_FUNC_ENABLE;
 
 	if (INTEL_GEN(dev_priv) >= 12) {
-		val &= ~(TRANS_DDI_FUNC_ENABLE | TGL_TRANS_DDI_PORT_MASK |
-			 TRANS_DDI_DP_VC_PAYLOAD_ALLOC);
+		if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST) ||
+		    intel_dp_mst_is_slave_trans(crtc_state))
+			val &= ~TGL_TRANS_DDI_PORT_MASK;
 	} else {
-		val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK |
-			 TRANS_DDI_DP_VC_PAYLOAD_ALLOC);
+		val &= ~TRANS_DDI_PORT_MASK;
 	}
-	I915_WRITE(reg, val);
+	I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), val);
 
 	if (dev_priv->quirks & QUIRK_INCREASE_DDI_DISABLED_TIME &&
 	    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 2f74c0bfb2a8..d3eefb271fa4 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6776,6 +6776,8 @@ static void haswell_crtc_disable(struct intel_atomic_state *state,
 	if (!transcoder_is_dsi(cpu_transcoder))
 		intel_disable_pipe(old_crtc_state);
 
+	intel_dp_mst_post_trans_disabled(old_crtc_state);
+
 	if (INTEL_GEN(dev_priv) >= 11)
 		icl_disable_transcoder_port_sync(old_crtc_state);
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 49f1518e3ab9..3c98a25e6308 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -365,6 +365,57 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder,
 					  old_crtc_state, old_conn_state);
 }
 
+static void
+dp_mst_post_trans_disabled(struct intel_encoder *encoder,
+			   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->base);
+	struct intel_digital_port *intel_dig_port = intel_mst->primary;
+	struct intel_dp *intel_dp = &intel_dig_port->dp;
+	struct intel_connector *connector =
+		to_intel_connector(old_conn_state->connector);
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	u32 val;
+
+	drm_dp_update_payload_part2(&intel_dp->mst_mgr);
+
+	val = I915_READ(TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder));
+	val &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
+	I915_WRITE(TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder), val);
+
+	if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status,
+				  DP_TP_STATUS_ACT_SENT, 1))
+		DRM_ERROR("Timed out waiting for ACT sent when disabling\n");
+
+	drm_dp_check_act_status(&intel_dp->mst_mgr);
+
+	drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
+}
+
+void
+intel_dp_mst_post_trans_disabled(const struct intel_crtc_state *old_crtc_state)
+{
+	struct drm_atomic_state *state = old_crtc_state->uapi.state;
+	struct drm_connector_state *old_conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST))
+		return;
+
+	for_each_old_connector_in_state(state, conn, old_conn_state, i) {
+		struct intel_encoder *encoder;
+
+		if (old_conn_state->crtc != old_crtc_state->uapi.crtc)
+			continue;
+
+		encoder = to_intel_encoder(old_conn_state->best_encoder);
+		dp_mst_post_trans_disabled(encoder, old_crtc_state,
+					   old_conn_state);
+	}
+}
+
 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 				      const struct intel_crtc_state *old_crtc_state,
 				      const struct drm_connector_state *old_conn_state)
@@ -383,6 +434,12 @@ static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 	WARN_ON(INTEL_GEN(dev_priv) >= 12 && last_mst_stream &&
 		!intel_dp_mst_is_master_trans(old_crtc_state));
 
+	/*
+	 * Power down mst path before disabling the port, otherwise we end
+	 * up getting interrupts from the sink upon detecting link loss.
+	 */
+	drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
+				     false);
 	/*
 	 * From TGL spec: "If multi-stream slave transcoder: Configure
 	 * Transcoder Clock Select to direct no clock to the transcoder"
@@ -393,24 +450,20 @@ static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 	if (INTEL_GEN(dev_priv) < 12 || !last_mst_stream)
 		intel_ddi_disable_pipe_clock(old_crtc_state);
 
-	/* this can fail */
-	drm_dp_check_act_status(&intel_dp->mst_mgr);
-	/* and this can also fail */
-	drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 
-	drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
+	intel_mst->connector = NULL;
+	if (last_mst_stream) {
+		enum transcoder cpu_transcoder;
+		u32 val;
 
-	/*
-	 * Power down mst path before disabling the port, otherwise we end
-	 * up getting interrupts from the sink upon detecting link loss.
-	 */
-	drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
-				     false);
+		cpu_transcoder = old_crtc_state->cpu_transcoder;
+		val = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
+		val &= ~TGL_TRANS_DDI_PORT_MASK;
+		I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), val);
 
-	intel_mst->connector = NULL;
-	if (last_mst_stream)
 		intel_dig_port->base.post_disable(&intel_dig_port->base,
 						  old_crtc_state, NULL);
+	}
 
 	DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 }
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.h b/drivers/gpu/drm/i915/display/intel_dp_mst.h
index e40767f78343..87f32fab90fc 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.h
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.h
@@ -16,5 +16,6 @@ void intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port);
 int intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port);
 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state);
 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state);
+void intel_dp_mst_post_trans_disabled(const struct intel_crtc_state *old_crtc_state);
 
 #endif /* __INTEL_DP_MST_H__ */
