diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1a06f97..391439f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2782,6 +2782,8 @@
 	int pipe = intel_crtc->pipe;
 	u32 reg, temp;
 
+	assert_transcoder_disabled(dev_priv, pipe);
+
 	/* For PCH output, training FDI link */
 	dev_priv->display.fdi_link_train(crtc);