diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 3919c66bcf00..e9e3772f9980 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -7212,6 +7212,10 @@ static void vop2_dither_setup(struct rockchip_crtc_state *vcstate, struct drm_cr
 		pre_dither_down_en = false;
 
 	if (vp_data->feature & VOP_FEATURE_POST_FRC_V2 && pre_dither_down_en) {
+		vop2_writel(vop2, RK3576_VP0_POST_DITHER_FRC_0, 0x00000000);
+		vop2_writel(vop2, RK3576_VP0_POST_DITHER_FRC_1, 0x01000100);
+		vop2_writel(vop2, RK3576_VP0_POST_DITHER_FRC_2, 0x04030100);
+
 		VOP_MODULE_SET(vop2, vp, pre_dither_down_en, 0);
 		VOP_MODULE_SET(vop2, vp, dither_down_en, 1);/* enable frc2.0 do 10->8 */
 		VOP_MODULE_SET(vop2, vp, dither_down_sel, DITHER_DOWN_FRC);
diff --git a/drivers/gpu/drm/rockchip/rockchip_vop_reg.h b/drivers/gpu/drm/rockchip/rockchip_vop_reg.h
index 498e0edbe131..19dbfedc04f6 100644
--- a/drivers/gpu/drm/rockchip/rockchip_vop_reg.h
+++ b/drivers/gpu/drm/rockchip/rockchip_vop_reg.h
@@ -1151,6 +1151,9 @@
 #define RK3568_VP0_BCSH_BCS				0xC64
 #define RK3568_VP0_BCSH_H				0xC68
 #define RK3568_VP0_BCSH_COLOR_BAR			0xC6C
+#define RK3576_VP0_POST_DITHER_FRC_0			0xCA0
+#define RK3576_VP0_POST_DITHER_FRC_1			0xCA4
+#define RK3576_VP0_POST_DITHER_FRC_2			0xCA8
 #define RK3562_VP0_MCU_CTRL				0xCF8
 #define RK3562_VP0_MCU_RW_BYPASS_PORT			0xCFC