diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index f8f8f29fb7c3..77662068bc11 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -875,13 +875,6 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
 	clk_disable_unprepare(dsi->pclk);
 }
 
-static bool dw_mipi_dsi_encoder_mode_fixup(struct drm_encoder *encoder,
-					const struct drm_display_mode *mode,
-					struct drm_display_mode *adjusted_mode)
-{
-	return true;
-}
-
 static void dw_mipi_dsi_encoder_commit(struct drm_encoder *encoder)
 {
 	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
@@ -931,7 +924,6 @@ static void dw_mipi_dsi_encoder_commit(struct drm_encoder *encoder)
 
 static struct drm_encoder_helper_funcs
 dw_mipi_dsi_encoder_helper_funcs = {
-	.mode_fixup = dw_mipi_dsi_encoder_mode_fixup,
 	.commit = dw_mipi_dsi_encoder_commit,
 	.mode_set = dw_mipi_dsi_encoder_mode_set,
 	.disable = dw_mipi_dsi_encoder_disable,