Random Stability issue with some SDHC cards on i.MX6

[isaacnickaein]

Hi,

I have some stability issues with some SD cards on i.MX6DL running Kerenel 3.10.  The MicroSD card I am using is a SanDisk MiroSD UHS-I with 8GB storage capacity.

As my board doesn't support 1.8V required for UHS-I, the bus mode High-Speed (with 3.3v) is automatically selected by kernel:

root@imx6qsabresd:/data# cat /sys/kernel/debug/mmc1/ios

clock:          50000000 Hz

actual clock:   49500000 Hz

vdd:            17 (2.9 ~ 3.0 V)

bus mode:       2 (push-pull)

chip select:    0 (don't care)

power mode:     2 (on)

bus width:      2 (4 bits)

timing spec:    2 (sd high-speed)

signal voltage: 0 (3.30 V)

However, sometimes I randomly got errors like:

mmcblk0: error -110 sending stop command, original cmd response 0x0, card status 0x400900

mmcblk0: error -110 transferring data, sector 9136, nr 8, cmd response 0x0, card status 0x0

during read/write. Also, sometimes during the boot (or after removing and reinserting the card) the kernel cannot detect the card (or clock frequency) to work with. In this case, removing and reinserting the card several times didn't solve the issue. However, rebooting the board sometimes solves it.

The following log is kernel messages after I inserted the card and kernel failed to recognize it (I've define DEBUG in the sdhci-esdhc-imx.c):

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 0

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 0

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 400000, actual: 386718

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 0

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 400000, actual: 386718

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 0

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 400000, actual: 386718

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 0

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 400000, actual: 386718

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 0

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 400000, actual: 386718

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 0

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 400000, actual: 386718

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 0

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 400000, actual: 386718

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 2

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 400000, actual: 386718

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 50000000, actual: 49500000

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 2

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 50000000, actual: 49500000

sdhci-esdhc-imx 2194000.usdhc: change pinctrl state for uhs 2

sdhci-esdhc-imx 2194000.usdhc: desired SD clock: 50000000, actual: 49500000

mmc1: new high speed SDHC card at address 0007

mmcblk0: mmc1:0007 SD08G 7.42 GiB

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

blk_update_request: 89 callbacks suppressed

end_request: I/O error, dev mmcblk0, sector 0

quiet_error: 81 callbacks suppressed

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: unable to read partition table

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

end_request: I/O error, dev mmcblk0, sector 0

Buffer I/O error on device mmcblk0, logical block 0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 131072, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 131072, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 131073, nr 7, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 131074, nr 6, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 131075, nr 5, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 131076, nr 4, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 131077, nr 3, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 131078, nr 2, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 131079, nr 1, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00

mmcblk0: retrying using single block read

mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0

[igorpadykov]

Hi Isaac

if issue appears only with some cards that may be related to

signal integrity, try to tweak drive strength both for processor pads

and SD card (CMD6 selects driver strength). One can recheck SD signals

layout with  i.MX6 System Development User’s Guide (rev.1, 6/2013)

http://cache.freescale.com/files/32bit/doc/user_guide/IMX6DQ6SDLHDG.pdf

Best regards

igor

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[sudheerkumark]

Can you suggest us the drive strength values for that this issue might solve.

[jhhong]

It appears on emmc，it will lead the machine couldn't run into system.