diff --git a/plat/rockchip/rk3399/plat_sip_calls.c b/plat/rockchip/rk3399/plat_sip_calls.c
index c2cc5b1..ce8476c 100644
--- a/plat/rockchip/rk3399/plat_sip_calls.c
+++ b/plat/rockchip/rk3399/plat_sip_calls.c
@@ -56,17 +56,21 @@
 				    void *handle,
 				    u_register_t flags)
 {
+#ifdef PLAT_RK_DP_HDCP
 	uint64_t x5, x6;
+#endif
 
 	switch (smc_fid) {
 	case RK_SIP_DDR_CFG:
 		SMC_RET1(handle, ddr_smc_handler(x1, x2, x3, x4));
+#ifdef PLAT_RK_DP_HDCP
 	case RK_SIP_HDCP_CONTROL:
 		SMC_RET1(handle, dp_hdcp_ctrl(x1));
 	case RK_SIP_HDCP_KEY_DATA64:
 		x5 = read_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X5);
 		x6 = read_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X6);
 		SMC_RET1(handle, dp_hdcp_store_key(x1, x2, x3, x4, x5, x6));
+#endif
 	default:
 		ERROR("%s: unhandled SMC (0x%x)\n", __func__, smc_fid);
 		SMC_RET1(handle, SMC_UNK);
diff --git a/plat/rockchip/rk3399/platform.mk b/plat/rockchip/rk3399/platform.mk
index cfc48e8..4a725eb 100644
--- a/plat/rockchip/rk3399/platform.mk
+++ b/plat/rockchip/rk3399/platform.mk
@@ -56,7 +56,6 @@
 			${RK_PLAT_COMMON}/aarch64/platform_common.c	\
 			${RK_PLAT_COMMON}/rockchip_sip_svc.c		\
 			${RK_PLAT_SOC}/plat_sip_calls.c			\
-			${RK_PLAT_SOC}/drivers/dp/cdn_dp.c		\
 			${RK_PLAT_SOC}/drivers/gpio/rk3399_gpio.c	\
 			${RK_PLAT_SOC}/drivers/pmu/pmu.c		\
 			${RK_PLAT_SOC}/drivers/pmu/pmu_fw.c		\
@@ -87,17 +86,21 @@
 RK3399M0PMUFW=${BUILD_M0}/${PLAT_M0}pmu.bin
 $(eval $(call add_define,RK3399M0PMUFW))
 
+ifdef PLAT_RK_DP_HDCP
+BL31_SOURCES	+= ${RK_PLAT_SOC}/drivers/dp/cdn_dp.c
+
 HDCPFW=${RK_PLAT_SOC}/drivers/dp/hdcp.bin
 $(eval $(call add_define,HDCPFW))
 
+${BUILD_PLAT}/bl31/cdn_dp.o: CCACHE_EXTRAFILES=$(HDCPFW)
+${RK_PLAT_SOC}/drivers/dp/cdn_dp.c: $(HDCPFW)
+endif
+
 # CCACHE_EXTRAFILES is needed because ccache doesn't handle .incbin
 export CCACHE_EXTRAFILES
 ${BUILD_PLAT}/bl31/pmu_fw.o: CCACHE_EXTRAFILES=$(RK3399M0FW):$(RK3399M0PMUFW)
 ${RK_PLAT_SOC}/drivers/pmu/pmu_fw.c: $(RK3399M0FW)
 
-${BUILD_PLAT}/bl31/cdn_dp.o: CCACHE_EXTRAFILES=$(HDCPFW)
-${RK_PLAT_SOC}/drivers/dp/cdn_dp.c: $(HDCPFW)
-
 $(eval $(call MAKE_PREREQ_DIR,${BUILD_M0},${BUILD_PLAT}))
 .PHONY: $(RK3399M0FW)
 $(RK3399M0FW): | ${BUILD_M0}