diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 425338e041b0..81ae368f18c1 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -7743,7 +7743,8 @@ static void vop3_setup_pipe_dly(struct vop2_video_port *vp, const struct vop2_zp
 		sdr_win_dly = 0;
 	}
 
-	pre_scan_dly = bg_dly + (hdisplay >> 1) - 1;
+	/* hdisplay must roundup as 2 pixel */
+	pre_scan_dly = bg_dly + (roundup(hdisplay, 2) >> 1) - 1;
 	pre_scan_dly = (pre_scan_dly << 16) | hsync_len;
 	VOP_MODULE_SET(vop2, vp, bg_dly, bg_dly);
 	VOP_MODULE_SET(vop2, vp, pre_scan_htiming, pre_scan_dly);
@@ -9309,10 +9310,14 @@ static void vop2_setup_dly_for_vp(struct vop2_video_port *vp)
 		hdisplay = adjusted_mode->crtc_hdisplay;
 	}
 
+	/*
+	 * splice mode: hdisplay must roundup as 4 pixel,
+	 * no splice mode: hdisplay must roundup as 2 pixel.
+	 */
 	if (vcstate->splice_mode)
-		pre_scan_dly = bg_dly + (hdisplay >> 2) - 1;
+		pre_scan_dly = bg_dly + (roundup(hdisplay, 4) >> 2) - 1;
 	else
-		pre_scan_dly = bg_dly + (hdisplay >> 1) - 1;
+		pre_scan_dly = bg_dly + (roundup(hdisplay, 2) >> 1) - 1;
 
 	if (vop2->version == VOP_VERSION_RK3588 && hsync_len < 8)
 		hsync_len = 8;