diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 5b2658093042..2a2cd31a1cb4 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -332,14 +332,6 @@ static void dw_hdmi_rockchip_encoder_disable(struct drm_encoder *encoder)
 {
 }
 
-static bool
-dw_hdmi_rockchip_encoder_mode_fixup(struct drm_encoder *encoder,
-				    const struct drm_display_mode *mode,
-				    struct drm_display_mode *adj_mode)
-{
-	return true;
-}
-
 static void dw_hdmi_rockchip_encoder_enable(struct drm_encoder *encoder)
 {
 	struct rockchip_hdmi *hdmi = to_rockchip_hdmi(encoder);
@@ -401,7 +393,6 @@ static void dw_hdmi_rockchip_encoder_mode_set(struct drm_encoder *encoder,
 }
 
 static const struct drm_encoder_helper_funcs dw_hdmi_rockchip_encoder_helper_funcs = {
-	.mode_fixup = dw_hdmi_rockchip_encoder_mode_fixup,
 	.enable     = dw_hdmi_rockchip_encoder_enable,
 	.disable    = dw_hdmi_rockchip_encoder_disable,
 	.atomic_check = dw_hdmi_rockchip_encoder_atomic_check,