Hello Yi Sun, Any plan to push it[0] forward? My sdhci-arasan 5.1 can support enhance strobe for hs400. After applying your patch, it does work for me. It's a big improvement for CMD singnal to gurantee the SI. [1]: https://patchwork.kernel.org/patch/6545421/ -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html