diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 312e90da78bf..6d1b3de3045b 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3091,28 +3091,26 @@ static void intel_ddi_post_disable_hdmi(struct intel_atomic_state *state,
 	intel_dp_dual_mode_set_tmds_output(intel_hdmi, false);
 }
 
-static void intel_ddi_post_disable(struct intel_atomic_state *state,
-				   struct intel_encoder *encoder,
-				   const struct intel_crtc_state *old_crtc_state,
-				   const struct drm_connector_state *old_conn_state)
+static void intel_ddi_post_disable_hdmi_or_sst(struct intel_atomic_state *state,
+					       struct intel_encoder *encoder,
+					       const struct intel_crtc_state *old_crtc_state,
+					       const struct drm_connector_state *old_conn_state)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_crtc *slave_crtc;
 
-	if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST)) {
-		intel_crtc_vblank_off(old_crtc_state);
+	intel_crtc_vblank_off(old_crtc_state);
 
-		intel_disable_transcoder(old_crtc_state);
+	intel_disable_transcoder(old_crtc_state);
 
-		intel_ddi_disable_transcoder_func(old_crtc_state);
+	intel_ddi_disable_transcoder_func(old_crtc_state);
 
-		intel_dsc_disable(old_crtc_state);
+	intel_dsc_disable(old_crtc_state);
 
-		if (DISPLAY_VER(dev_priv) >= 9)
-			skl_scaler_disable(old_crtc_state);
-		else
-			ilk_pfit_disable(old_crtc_state);
-	}
+	if (DISPLAY_VER(dev_priv) >= 9)
+		skl_scaler_disable(old_crtc_state);
+	else
+		ilk_pfit_disable(old_crtc_state);
 
 	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, slave_crtc,
 					 intel_crtc_bigjoiner_slave_pipes(old_crtc_state)) {
@@ -3124,6 +3122,16 @@ static void intel_ddi_post_disable(struct intel_atomic_state *state,
 		intel_dsc_disable(old_slave_crtc_state);
 		skl_scaler_disable(old_slave_crtc_state);
 	}
+}
+
+static void intel_ddi_post_disable(struct intel_atomic_state *state,
+				   struct intel_encoder *encoder,
+				   const struct intel_crtc_state *old_crtc_state,
+				   const struct drm_connector_state *old_conn_state)
+{
+	if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST))
+		intel_ddi_post_disable_hdmi_or_sst(state, encoder, old_crtc_state,
+						   old_conn_state);
 
 	/*
 	 * When called from DP MST code: