diff --git a/arch/arm/include/asm/arch-rockchip/sdram_common.h b/arch/arm/include/asm/arch-rockchip/sdram_common.h
index 578db90241..4749233226 100644
--- a/arch/arm/include/asm/arch-rockchip/sdram_common.h
+++ b/arch/arm/include/asm/arch-rockchip/sdram_common.h
@@ -98,6 +98,7 @@ struct sdram_base_params {
 					SYS_REG_CS1_ROW_SHIFT(ch))
 #define SYS_REG_BW_SHIFT(ch)		(2 + (ch) * 16)
 #define SYS_REG_BW_MASK			3
+#define SYS_REG_ENC_BW(n, ch)		((2 >> (n)) << SYS_REG_BW_SHIFT(ch))
 #define SYS_REG_DBW_SHIFT(ch)		((ch) * 16)
 #define SYS_REG_DBW_MASK		3
 #define SYS_REG_ENC_DBW(n, ch)		((2 >> (n)) << SYS_REG_DBW_SHIFT(ch))
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index a83709f271..2d3f0f6902 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -1096,8 +1096,7 @@ static void dram_all_config(struct dram_info *dram,
 		sys_reg |= SYS_REG_ENC_BK(info->cap_info.bk, channel);
 		sys_reg |= SYS_REG_ENC_CS0_ROW(info->cap_info.cs0_row, channel);
 		sys_reg |= SYS_REG_ENC_CS1_ROW(info->cap_info.cs1_row, channel);
-		sys_reg |= (2 >> info->cap_info.bw) <<
-			   SYS_REG_BW_SHIFT(channel);
+		sys_reg |= SYS_REG_ENC_BW(info->cap_info.bw, channel);
 		sys_reg |= SYS_REG_ENC_DBW(info->cap_info.dbw, channel);
 
 		ddr_msch_regs = dram->chan[channel].msch;