On 29/04/16 10:42, Dong Aisheng wrote:

And IMX6DL ARD is even worser due to it's using common
mmc_send_tuning() function.
root at imx6qdlsolo:~# 
root at imx6qdlsolo:~# [  129.462564] sysrq: SysRq : Changing Loglevel
[  129.466902] sysrq: Loglevel set to 8
[  131.616078] sdhci-esdhc-imx 2198000.usdhc: desired SD clock: 198000000, actual: 198000000
[  131.625311] sdhci-esdhc-imx 2198000.usdhc: change pinctrl state for uhs 6
[  131.632133] sdhci-esdhc-imx 2198000.usdhc: desired SD clock: 198000000, actual: 198000000
[  131.642121] mmc0: starting CMD13 arg 59b40000 flags 00000195
[  131.648925] sdhci-esdhc-imx 2198000.usdhc: tunning with delay 0x0 ESDHC_TUNE_CTRL_STATUS 0x0
[  131.657818] mmc0: starting CMD19 arg 00000000 flags 00000035
[  131.663518] mmc0:     blksz 64 blocks 1 flags 00000200 tsac 150 ms nsac 0
[  131.670835] mmc0: req done (CMD19): -123: 00000000 00000000 00000000 00000000

You should stop here because -123 is -ENOMEDIUM