Error: mmcblk0rpmb: error -110 transferring data

[nirmalluhana]

 Hello,

Release: Yocto-Sumo (4.14.78_1.0.0_GA)

Board: i.MX8MQ based custom board

We are working on iMX8MQ based custom board and facing issue while reading/writing data on eMMC.

As per some answers available on the community I have modified drive strength in PAD muxing and issue is resolved and able to access memory without any error.

Now, when I hit "fdisk -l" command, I have got the same error only from mmcblk0rpmb partition.

Logs are attached below.

root@imx8mqpicoitx:~#
root@imx8mqpicoitx:~# fdisk -l
Disk /dev/mmcblk0: 29.7 GiB, 31826378752 bytes, 62160896 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xa7959753

Device         Boot  Start     End Sectors  Size Id Type
/dev/mmcblk0p1       16384  147455  131072   64M  c W95 FAT32 (LBA)
/dev/mmcblk0p2      147456 5046271 4898816  2.3G 83 Linux

[   66.725570] mmcblk0rpmb: error -110 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00
[   72.284913] mmcblk0rpmb: error -110 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00
[   72.294770] mmcblk0rpmb: retrying using single block read
[   77.671231] mmcblk0rpmb: error -110 transferring data, sector 8, nr 8, cmd response 0x900, card status 0xb00
[   77.681087] mmcblk0rpmb: retrying using single block read
Disk /dev/mmcblk0rpmb: 4 MiB, 4194304 bytes, 8192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mmcblk0boot1: 31.5 MiB, 33030144 bytes, 64512 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mmcblk0boot0: 31.5 MiB, 33030144 bytes, 64512 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
root@imx8mqpicoitx:~#
root@imx8mqpicoitx:~#
root@imx8mqpicoitx:~#
root@imx8mqpicoitx:~# dmesg | grep mmcblk0rpmb
[    2.025005] mmcblk0rpmb: mmc0:0001 S0J57X partition 3 4.00 MiB
[   66.725570] mmcblk0rpmb: error -110 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00
[   72.284913] mmcblk0rpmb: error -110 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00
[   72.294770] mmcblk0rpmb: retrying using single block read
[   77.671231] mmcblk0rpmb: error -110 transferring data, sector 8, nr 8, cmd response 0x900, card status 0xb00
[   77.681087] mmcblk0rpmb: retrying using single block read
root@imx8mqpicoitx:~#
root@imx8mqpicoitx:~#

Does anyone have any idea for what purpose this mmcblk0rpmb partition is used?

Why this error occurs only from mmcblk0rpmb partition?

Best regards,

Nirmal

[Bio_TICFSL]

Hello NIRMAL,

This is related to low quality of eMMC card, please try with a brand new high quality eMMC card. Also similar error are discuses on generic Linux email list, please check solutions:

[PATCH 2/3] MMC: improve error recovery from command channel errors 

mmc: block: change stop errors to info - Patchwork 

[LTSI-dev] [PATCH] mmc: block: fix a bug of error handling in Linux MMC driver. 

Many mmc cards require a stronger pullup on CMD signal to be recognized. a workaround is to change the Resistor (for SD) from 100K to 10K.

Regards

[nirmalluhana]

Hello Bio_TICFSL,

Thanks for your quick response.

We are using new high-quality eMMC from Micron. Can you explain what the high quality means here? This is a JEDEC standard supported memory.

We are using strong pull up that what you suggested, 4.7k, On CMD & Data 0 line.

Do you have any idea for what purpose this mmcblk0rpmb partition is used?

Best regards,

Nirmal

[nirmalluhana]

Hello Bio_TICFSL,

Any update on this?

Best regards,

Nirmal

[Bio_TICFSL]

Hello,

No update, so you have chance to try another SD?

Regards

[nirmalluhana]

Hello Bio_TICFSL,

We are using non-removable eMMC card. So, it is not possible to try with another card.

Best regards,

Nirmal

[nirmalluhana]

Hello Bio_TICFSL,

We observed that this mmblk0rpmb block doesn't have read/write access due to this error is occurred only from that block.

Do you have any idea how to provide read/write access to this block?

Best regards,

Nirmal

[nirmalluhana]

Hello Bio_TICFSL,

Any update on this?

Best regards,

Nirmal

[nirmalluhana]

Hello Bio_TICFSL,

Any update on this?

Best regards,

Nirmal

[nirmalluhana]

Hello Bio_TICFSL,

Any update on this?

Best regards,

Nirmal