diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index a13f1f51f68e7c7d6efcef521287c2c1d56ffadc..494219ccdf9621a4f7b35a605088531a68859ecf 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -213,6 +213,10 @@ i2c_dp_aux_prepare_bus(struct i2c_adapter *adapter)
  *
  * RETURNS:
  * 0 on success, -ERRNO on failure.
+ *
+ * IMPORTANT:
+ * This interface is deprecated, please switch to the new dp aux helpers and
+ * drm_dp_aux_register_i2c_bus().
  */
 int
 i2c_dp_aux_add_bus(struct i2c_adapter *adapter)