STM32MP151C [linux-stm32mp] errors during writing on MMC

[PPiwk.1]

Hi,

We have a custom board based on the STM32MP151C CPU and we found that after migration to stm32mpu-ecosystem-v4 (linux-stm32mp 5.15) provided by the meta-st-stm32mp yocto layer (langdale) there are some errors during MMC writing procedure:

[ 3358.815661] blk_update_request: I/O error, dev mmcblk0, sector 1199146 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0
[ 3358.815720] EXT4-fs warning (device mmcblk0p12): ext4_end_bio:342: I/O error 10 writing to inode 229382 starting block 599574)
[ 3358.815754] Buffer I/O error on device mmcblk0p12, logical block 15893

We observe the same behavior on all of our boards, so we have eliminated MMC corruption. The fsck.ext4 doesn't help and the errors still occur.

In the previous ecosystem based on linux-stm32mp 5.10 everything was fine and we've never noticed any problems with MMC.

Have you faced such an error and know any solution for it? How should we proceed with it?

Thank you in advance

[Billy OWEN]

Hi @PPiwk.1 

This post has been escalated to the ST Online Support Team for additional assistance.  We'll contact you directly.

Regards,

Billy

[PPiwk.1 · Accepted solution]

Hi, 

Together with ST Support Team, we found the issue is caused by the wrong definition of the reserved memory region for OPTEE in u-boot/linux dts. In my case it should be:

optee@c6000000{
    reg = <0xc6000000 0x02000000>;
    no-map;
};