diff --git a/arch/arm/boot/dts/rv1109-evb-ddr3-v12-facial-gate.dts b/arch/arm/boot/dts/rv1109-evb-ddr3-v12-facial-gate.dts
index d87b2c840ebf..0bf7e5f8bcf1 100644
--- a/arch/arm/boot/dts/rv1109-evb-ddr3-v12-facial-gate.dts
+++ b/arch/arm/boot/dts/rv1109-evb-ddr3-v12-facial-gate.dts
@@ -120,6 +120,11 @@
 	};
 };
 
+/* isp cma buffer don't fiddle with it, dual camera(1920 * 1080) need 92M buffer */
+&isp_reserved {
+	size = <0x5c00000>;
+};
+
 &mipi_csi2 {
 	status = "okay";
 	ports {