diff --git a/src/hal/hisi/v4_hal.c b/src/hal/hisi/v4_hal.c
index 5b1621c..9220c65 100644
--- a/src/hal/hisi/v4_hal.c
+++ b/src/hal/hisi/v4_hal.c
@@ -230,7 +230,8 @@ int v4_pipeline_create(void)
     {
         v4_sys_oper mode[4];
         v4_sys.fnGetViVpssMode((v4_sys_oper*)mode);
-        mode[_v4_vi_dev] = V4_SYS_OPER_VIOFF_VPSSON;
+        for (char i = 0; i < 4; i++)
+            mode[i] = V4_SYS_OPER_VIOFF_VPSSON;
         if (ret = v4_sys.fnSetViVpssMode((v4_sys_oper*)mode))
             return ret;
     }
diff --git a/src/hal/hisi/v4_snr.h b/src/hal/hisi/v4_snr.h
index d8d2d93..bea8223 100644
--- a/src/hal/hisi/v4_snr.h
+++ b/src/hal/hisi/v4_snr.h
@@ -9,6 +9,7 @@
 #define V4_SNR_LVDS_LANE_NUM 4
 #define V4_SNR_MIPI_LANE_NUM 4
 #define V4_SNR_WDR_VC_NUM 2
+#define V4A_SNR_WDR_VC_NUM 4
 
 enum {
     V4_SNR_CMD_CONF_DEV = 1,