ANALOGIX_DP_SYS_CTL_2
writel(0x40, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_2);