Hi Guodong,

On 21 April 2016 at 02:38, Guodong Xu <guodong.xu@linaro.org> wrote:

Hi, Liming

The subject line is miss-leading. :)

Kernel 4.4 based hikey-mainline-rebase is full featured. MMC/SD card
is supported. One of the possible reason should be related to mmc host
controller not reset completely.

There is no such issue in UEFI. But since you are using uboot, maybe
it lacks some initialization codes for mmc controller.

Does the UEFI code assert the reset line on the IP before booting the kernel?

If so I might need to add something similar to U-Boot.

regards,

Peter.