Re: [Dev] 4.4 kernel can't detect sd card on hikey board?

On 21 April 2016 at 15:29, Peter Griffin peter.griffin@linaro.org wrote:

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.

UEFI didn't reset eMMC/SD just before booting the kernel.

Regards Haojian