eMMC writing in u-boot

[Hashimoto Kenichi 0]

The following settings were made to save the u-boot env to eMMC.

U-Boot 2022.01

CONFIG_ENV_IS_IN_MMC=y
CONFIG_SYS_MMC_ENV_DEV=0
CONFIG_SYS_MMC_ENV_PART=0

The write operation succeeds once, but then the eMMC stops responding.
Writing by ums is also successful, so writing itself seems to be OK, but there seems to be a problem in the subsequent operation.

What are the problems with writing to eMMC?

 

Edited June 5, 2023 by Hashimoto Kenichi

[Hashimoto Kenichi 0]

Even if You don't write

mmc dev 0

was not working.

 

[Hashimoto Kenichi 0]

=> mmc dev 0
CMD_SEND:0
                ARG                      0x00000000
                MMC_RSP_NONE
CMD_SEND:8
                ARG                      0x000000aa
                RET                      -110
CMD_SEND:55
                ARG                      0x00000000
                RET                      -110
CMD_SEND:0
                ARG                      0x00000000
                MMC_RSP_NONE
CMD_SEND:8
                ARG                      0x000000aa
                RET                      -110
CMD_SEND:55
                ARG                      0x00000000
                RET                      -110
CMD_SEND:0
                ARG                      0x00000000
                MMC_RSP_NONE
CMD_SEND:1
                ARG                      0x00000000
                MMC_RSP_R3,4             0xffffffff
CMD_SEND:2
                ARG                      0x00000000
                RET                      -110
CMD_SEND:2
                ARG                      0x00000000
                RET                      -110
CMD_SEND:2
                ARG                      0x00000000
                RET                      -110
CMD_SEND:2
                ARG                      0x00000000
                RET                      -110
CMD_SEND:2
                ARG                      0x00000000
                RET                      -110

Enable CONFIG_MMC_TRACE

[tooz 47]

hello @Hashimoto Kenichi, 

1. are you using tinker os?

On 6/5/2023 at 1:20 PM, Hashimoto Kenichi said:

but there seems to be a problem in the subsequent operation.

What are the problems with writing to eMMC?

2. what's the error you encountered?

to write in uboot:

1. connect tinker board 2s to an ubuntu machine (tinker board 2s should be in ums mode while connecting)

2. press any key during booting to enter u-boot

3. here's an example using setenv/ printenv, and then savenv

4. saveenv and reboot, printenv test and it returns the right value

[Hashimoto Kenichi 0]

1. are you using tinker os?
No.
I am using Yocto (kirkstone) with patches.
u-boot version is 2022.01.

2. what's the error you encountered?
The second "mmc dev 0" execution results in an error.
Writing to eMMC, such as saveenv, succeeds, but distro_bootcmd executes "mmc dev 0", so it fails there.

[Hashimoto Kenichi 0]

CMD_SEND:1
                ARG                      0x00000000
                MMC_RSP_R3,4             0xffffffff

The above is clearly an outlier and we are trying to find the cause.

[tooz 47]

@Hashimoto Kenichi, 

one possible reason might be broken emmc, but we'll need more information to confirm if it's the cause

1, what are the results of:

printenv devnum

and

printenv devtype

?

2. where was the uboot flashed onto? (such as emmc/ sd card/ other storage ... etc)

3. is there any other storage (such as sd card/ usb flash storage ... etc) attached to tinker board 2s?

[Hashimoto Kenichi 0]

1. what are the results of:
devnum and devtype is not set.
Because I use distro_bootcmd.

2. where was the uboot flashed onto?
eMMC

3. is there any other storage (such as sd card/ usb flash storage ... etc) attached to tinker board 2s?
SD card is removed.

[tooz 47]

hello @Hashimoto Kenichi, 

devnum and devtype are set by default if you're using tinker os, may i know what's the source code you're using for compiling os/ uboot, so we can have a look at the configs?

[Hashimoto Kenichi 0]

I don't use Tinker OS.

git://git.yoctoproject.org/meta-rockchip
https://source.denx.de/u-boot/u-boot.git
v2022.01

[tooz 47]

hello @Hashimoto Kenichi, 

both devtype and devnum need to be set, please try using the uboot sources from: TinkerBoard2/u-boot (github.com)

TinkerBoard2/u-boot at linux4.19-rk3399-debian10 (github.com)

kernel base = 4.19