diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index dd38b6835528..323fc097c3ee 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -425,6 +425,7 @@ static void glk_dsi_device_ready(struct intel_encoder *encoder)
 		if (intel_wait_for_register(dev_priv,
 				MIPI_CTRL(port), GLK_ULPS_NOT_ACTIVE,
 				GLK_ULPS_NOT_ACTIVE, 20))
+			DRM_ERROR("ULPS is still active\n");
 
 		/* Exit ULPS */
 		val = I915_READ(MIPI_DEVICE_READY(port));