diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index bad63d0f5f13f8938b346abc002fac8bd25b29af..677bb78a9210f2ce664937b08a54d5c226318bd2 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -385,7 +385,7 @@ static int tegra_sor_compute_params(struct tegra_sor *sor,
 }
 
 static int tegra_sor_calc_config(struct tegra_sor *sor,
-				 struct drm_display_mode *mode,
+				 const struct drm_display_mode *mode,
 				 struct tegra_sor_config *config,
 				 struct drm_dp_link *link)
 {