diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index a4b2d187d508..4565465318c3 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -3349,7 +3349,7 @@ static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
 	     s->output_if & VOP_OUTPUT_IF_BT656))
 		adj_mode->crtc_clock *= 2;
 
-	if (vop->mcu_timing.mcu_pix_total)
+	if (s->output_if & VOP_OUTPUT_IF_RGB)
 		adj_mode->crtc_clock *= rockchip_drm_get_cycles_per_pixel(s->bus_format) *
 					(vop->mcu_timing.mcu_pix_total + 1);