diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
index 207aa3f660b030870b722317fe24f575493c2cc7..6b566f3aeecbcac81d44c78720ed9c0bc4f75398 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
@@ -57,7 +57,6 @@ void hibmc_set_current_gate(struct hibmc_drm_private *priv,
 int hibmc_de_init(struct hibmc_drm_private *priv);
 int hibmc_vdac_init(struct hibmc_drm_private *priv);
 
-int hibmc_mm_init(struct hibmc_drm_private *hibmc);
 int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_connector *connector);
 
 #endif