Error when modifying Linux kernel

Forum|Forum|1 year ago
June 8, 2024
1 reply
2479 views

Hello all,

I was trying to build Linux kernel and push into my STM32MP135F-DK. For this, I was following the steps below link (Modify, rebuild and reload the Linux® kernel):

https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP1_boards/STM32MP135x-DK/Develop_on_Arm%C2%AE_Cortex%C2%AE-A7/Modify,_rebuild_and_reload_the_Linux%C2%AE_kernel

Nothing seemed wrong to me until "5.4. Reboot the board" step. After I rebooted the board, only the ST logo appears for a while, then it disappears and a black screen appears for a few seconds, then the ST logo appears again. This loop continues constantly and never switches to other screens (Linux splash screen, Weston desktop, GTK demo launcher).

I have no idea why I experienced such a thing since everything seemed correct until the reboot step. I wondered if I had pushed the wrong device tree in the "5.2. Push the device tree into the board" step in the link above (since I was using STM32MP135F-DK, I pushed the stm32mp135f-dk.dtb one). But I am not sure.

Can you help me?

This topic has been closed for replies.

Best answer by Gregory PLANCHON

Hi @alpka ,

Your dt is not deleted, the system just can't find it.
In order for your board to boot correctly, all your boot stages must be aligned with each other.
You can find the versions of the different systems used in several places in the wiki:
in the release notes : https://wiki.st.com/stm32mpu/wiki/STM32_MPU_OpenSTLinux_release_note_-_v5.0.0#Release_content
in the developer package : https://wiki.st.com/stm32mpu/wiki/STM32MP1_Developer_Package#Installing_the_OpenSTLinux_BSP_packages
and in the wiki archives for older versions like 4.1 : https://wiki.st.com/stm32mpu/wiki/Wiki_archives

Finally, you don't need a new SD card, you just need to reflash it with a starter package to get the software working again.

Regards,

Grégory

Gregory PLANCHON

ST Employee

Hi @alpka ,
Have you tried looking at the boot traces (using minicom or putty for example) to see if there was an error message?

And if so, could you please share them with me?

Regards,

Grégory

alpkaAuthor

Visitor II

Hi @Gregory PLANCHON,

Here are the traces:

U-Boot 2021.10-stm32mp-r2-rc2 (Oct 04 2021 - 15:09:26 +0000)

CPU: STM32MP135F Rev.?
Model: STMicroelectronics STM32MP135F-DK Discovery Board
Board: stm32mp1 in trusted mode (st,stm32mp135f-dk)
Board: MB1635 Var1.0 Rev.E-02
DRAM: 512 MiB
optee optee: OP-TEE: revision 3.16 (d0b742d1)
Clocks:
- MPU : 1000 MHz
- AXI : 266.500 MHz
- PER : 24 MHz
- DDR : 533 MHz
WDT: Started with servicing (32s timeout)
NAND: 0 MiB
MMC: STM32 SD/MMC: 0, STM32 SD/MMC: 1
Loading Environment from MMC... OK
In: serial
Out: serial
Err: serial
Net: eth0: eth1@5800a000, eth1: eth2@5800e000
Hit any key to stop autoboot: 0 
Boot over mmc0!
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:8...
Found /mmc0_extlinux/stm32mp135f-dk_extlinux.conf
Retrieving file: /mmc0_extlinux/stm32mp135f-dk_extlinux.conf
565 bytes read in 16 ms (34.2 KiB/s)
Retrieving file: /splash_landscape.bmp
7802 bytes read in 15 ms (507.8 KiB/s)
Select the boot mode
1: OpenSTLinux
2: stm32mp135f-dk-a7-examples
Enter choice: 1: OpenSTLinux
Retrieving file: /st-image-resize-initrd
29827666 bytes read in 1257 ms (22.6 MiB/s)
Retrieving file: /uImage
8212928 bytes read in 358 ms (21.9 MiB/s)
append: root=PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582 rootwait rw console=ttySTM0,115200
Retrieving file: /stm32mp135f-dk.dtb
62266 bytes read in 17 ms (3.5 MiB/s)
## Booting kernel from Legacy Image at c2000000 ...
 Image Name: Linux-6.1.28
 Created: 2024-06-10 6:48:56 UTC
 Image Type: ARM Linux Kernel Image (uncompressed)
 Data Size: 8212864 Bytes = 7.8 MiB
 Load Address: c2000040
 Entry Point: c2000040
 Verifying Checksum ... OK
## Flattened Device Tree blob at c4000000
 Booting using the fdt blob at 0xc4000000
 XIP Kernel Image
 Loading Ramdisk to ce38d000, end cffff252 ... OK
 Loading Device Tree to ce37a000, end ce38c339 ... OK
gc2145@3c node not found - DT update aborted

Starting kernel ...

M/TC: CPU : 0
M/TC: usr_sp : 0xbee41cb8
M/TC: usr_lr : 0xb6de2397
M/TC: irq_spsr : 0x600d0193
M/TC: irq_sp : 0xc13571c0
M/TC: irq_lr : 0xc0100b20
M/TC: fiq_spsr : 0x05084dc2
M/TC: fiq_sp : 0xc13571f0
M/TC: fiq_lr : 0xc13571f0
M/TC: svc_spsr : 0x600d0013
M/TC: svc_sp : 0xc1201f38
M/TC: svc_lr : 0xc01090cc
M/TC: abt_spsr : 0x200d0193
M/TC: abt_sp : 0xc13571d0
M/TC: abt_lr : 0xc0100e60
M/TC: und_spsr : 0x60000093
M/TC: und_sp : 0xc13571e0
M/TC: und_lr : 0xc0100f60
M/TC: pmcr : 0x41072000
M/TC: mon_lr : 0xc0119888
M/TC: mon_spsr : 0x600d0093
E/TC:0 Panic 'Watchdog' at core/drivers/stm32_iwdg.c:105 <stm32_iwdg_it_handler>
E/TC:0 TEE load address @ 0xde200000
E/TC:0 Call stack:
E/TC:0 0xde203cb5
E/TC:0 0xde21a9e1
E/TC:0 0xde20f0cb
E/TC:0 0xde21a0a1
E/TC:0 0xde237a87
E/TC:0 0xde200340
NOTICE: CPU: STM32MP135F Rev.?
NOTICE: Model: STMicroelectronics STM32MP135F-DK Discovery Board
NOTICE: Board: MB1635 Var1.0 Rev.E-02
INFO: PMIC version = 0x21
NOTICE: Reset reason (0x234):
INFO: IWDG2 Reset (rst_iwdg2)
INFO: FCONF: Reading TB_FW firmware configuration file from: 0x2ffe0000
INFO: FCONF: Reading firmware configuration information for: stm32mp_io
INFO: Using SDMMC
INFO: Instance 1
INFO: Boot used partition fsbl1
NOTICE: BL2: v2.6-stm32mp1-r2.0(debug):v2.6-dirty
NOTICE: BL2: Built : 13:14:26, Nov 23 2021
INFO: BL2: Doing platform setup
INFO: RAM: DDR3-1066 bin F 1x4Gb 533MHz v1.53
INFO: Memory size = 0x20000000 (512 MB)
INFO: BL2: Loading image id 31
INFO: Loading image id=31 at address 0x30006000
INFO: Image id=31 loaded: 0x30006000 - 0x30006246
INFO: FCONF: Reading FW_CONFIG firmware configuration file from: 0x30006000
INFO: FCONF: Reading firmware configuration information for: mce_config
INFO: FCONF: Reading firmware configuration information for: dyn_cfg
INFO: FCONF: Reading firmware configuration information for: stm32mp1_firewall
INFO: BL2: Loading image id 4
INFO: Loading image id=4 at address 0xde200000
INFO: Image id=4 loaded: 0xde200000 - 0xde20001c
INFO: OPTEE ep=0xde200000
INFO: OPTEE header info:
INFO: magic=0x4554504f
INFO: version=0x2
INFO: arch=0x0
INFO: flags=0x0
INFO: nb_images=0x1
INFO: BL2: Loading image id 21
INFO: Loading image id=21 at address 0xde200000
INFO: Image id=21 loaded: 0xde200000 - 0xde277308
INFO: BL2: Skip loading image id 22
INFO: BL2: Loading image id 23
INFO: Loading image id=23 at address 0xc0400000
INFO: Image id=23 loaded: 0xc0400000 - 0xc040f418
INFO: BL2: Skip loading image id 26
INFO: BL2: Loading image id 5
INFO: Loading image id=5 at address 0xc0000000
INFO: Image id=5 loaded: 0xc0000000 - 0xc00e4534
NOTICE: BL2: Booting BL32
INFO: Entry point address = 0xde200000
INFO: SPSR = 0x1d3
I/TC: Early console on UART#4
I/TC: 
I/TC: Non-secure external DT found
I/TC: Embedded DTB found
I/TC: OP-TEE version: 3.16.0-dev (gcc version 11.2.0 (GCC)) #1 Fri 28 Jan 2022 02:28:18 PM UTC arm
I/TC: WARNING: This OP-TEE configuration might be insecure!
I/TC: WARNING: Please check https://optee.readthedocs.io/en/latest/architecture/porting_guidelines.html
I/TC: Primary CPU initializing
I/TC: WARNING: All debug access are allowed
I/TC: Platform stm32mp1: flavor PLATFORM_FLAVOR - DT stm32mp135f-dk.dts
I/TC: DTB enables console (non-secure)
I/TC: Primary CPU switching to normal world boot
optee optee: OP-TEE: revision 3.16 (d0b742d1)


U-Boot 2021.10-stm32mp-r2-rc2 (Oct 04 2021 - 15:09:26 +0000)

CPU: STM32MP135F Rev.?
Model: STMicroelectronics STM32MP135F-DK Discovery Board
Board: stm32mp1 in trusted mode (st,stm32mp135f-dk)
Board: MB1635 Var1.0 Rev.E-02
DRAM: 512 MiB
optee optee: OP-TEE: revision 3.16 (d0b742d1)
Clocks:
- MPU : 1000 MHz
- AXI : 266.500 MHz
- PER : 24 MHz
- DDR : 533 MHz
WDT: Started with servicing (32s timeout)
NAND: 0 MiB
MMC: STM32 SD/MMC: 0, STM32 SD/MMC: 1
Loading Environment from MMC... OK
In: serial
Out: serial
Err: serial
Net: eth0: eth1@5800a000, eth1: eth2@5800e000
Hit any key to stop autoboot: 0 
Boot over mmc0!
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:8...
Found /mmc0_extlinux/stm32mp135f-dk_extlinux.conf
Retrieving file: /mmc0_extlinux/stm32mp135f-dk_extlinux.conf
565 bytes read in 15 ms (36.1 KiB/s)
Retrieving file: /splash_landscape.bmp
7802 bytes read in 15 ms (507.8 KiB/s)
Select the boot mode
1: OpenSTLinux
2: stm32mp135f-dk-a7-examples
Enter choice: 1: OpenSTLinux
Retrieving file: /st-image-resize-initrd
29827666 bytes read in 1257 ms (22.6 MiB/s)
Retrieving file: /uImage
8212928 bytes read in 359 ms (21.8 MiB/s)
append: root=PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582 rootwait rw console=ttySTM0,115200
Retrieving file: /stm32mp135f-dk.dtb
62266 bytes read in 17 ms (3.5 MiB/s)
## Booting kernel from Legacy Image at c2000000 ...
 Image Name: Linux-6.1.28
 Created: 2024-06-10 6:48:56 UTC
 Image Type: ARM Linux Kernel Image (uncompressed)
 Data Size: 8212864 Bytes = 7.8 MiB
 Load Address: c2000040
 Entry Point: c2000040
 Verifying Checksum ... OK
## Flattened Device Tree blob at c4000000
 Booting using the fdt blob at 0xc4000000
 XIP Kernel Image
 Loading Ramdisk to ce38d000, end cffff252 ... OK
 Loading Device Tree to ce37a000, end ce38c339 ... OK
gc2145@3c node not found - DT update aborted

Starting kernel ...

M/TC: CPU : 0
M/TC: usr_sp : 0xbe82bcb8
M/TC: usr_lr : 0xb6e72397
M/TC: irq_spsr : 0x600d0193
M/TC: irq_sp : 0xc13571c0
M/TC: irq_lr : 0xc0100b20
M/TC: fiq_spsr : 0x040d91d2
M/TC: fiq_sp : 0xc13571f0
M/TC: fiq_lr : 0xc13571f0
M/TC: svc_spsr : 0x600d0013
M/TC: svc_sp : 0xc1201f38
M/TC: svc_lr : 0xc01090cc
M/TC: abt_spsr : 0x200d0193
M/TC: abt_sp : 0xc13571d0
M/TC: abt_lr : 0xc0100e60
M/TC: und_spsr : 0x600c0093
M/TC: und_sp : 0xc13571e0
M/TC: und_lr : 0xc0100f60
M/TC: pmcr : 0x41072000
M/TC: mon_lr : 0xc0119888
M/TC: mon_spsr : 0x600d0093
E/TC:0 Panic 'Watchdog' at core/drivers/stm32_iwdg.c:105 <stm32_iwdg_it_handler>
E/TC:0 TEE load address @ 0xde200000
E/TC:0 Call stack:
E/TC:0 0xde203cb5
E/TC:0 0xde21a9e1
E/TC:0 0xde20f0cb
E/TC:0 0xde21a0a1
E/TC:0 0xde237a87
E/TC:0 0xde200340
NOTICE: CPU: STM32MP135F Rev.?
NOTICE: Model: STMicroelectronics STM32MP135F-DK Discovery Board
NOTICE: Board: MB1635 Var1.0 Rev.E-02
INFO: PMIC version = 0x21
NOTICE: Reset reason (0x234):
INFO: IWDG2 Reset (rst_iwdg2)
INFO: FCONF: Reading TB_FW firmware configuration file from: 0x2ffe0000
INFO: FCONF: Reading firmware configuration information for: stm32mp_io
INFO: Using SDMMC
INFO: Instance 1
INFO: Boot used partition fsbl1
NOTICE: BL2: v2.6-stm32mp1-r2.0(debug):v2.6-dirty
NOTICE: BL2: Built : 13:14:26, Nov 23 2021
INFO: BL2: Doing platform setup
INFO: RAM: DDR3-1066 bin F 1x4Gb 533MHz v1.53
INFO: Memory size = 0x20000000 (512 MB)
INFO: BL2: Loading image id 31
INFO: Loading image id=31 at address 0x30006000
INFO: Image id=31 loaded: 0x30006000 - 0x30006246
INFO: FCONF: Reading FW_CONFIG firmware configuration file from: 0x30006000
INFO: FCONF: Reading firmware configuration information for: mce_config
INFO: FCONF: Reading firmware configuration information for: dyn_cfg
INFO: FCONF: Reading firmware configuration information for: stm32mp1_firewall
INFO: BL2: Loading image id 4
INFO: Loading image id=4 at address 0xde200000
INFO: Image id=4 loaded: 0xde200000 - 0xde20001c
INFO: OPTEE ep=0xde200000
INFO: OPTEE header info:
INFO: magic=0x4554504f
INFO: version=0x2
INFO: arch=0x0
INFO: flags=0x0
INFO: nb_images=0x1
INFO: BL2: Loading image id 21
INFO: Loading image id=21 at address 0xde200000
INFO: Image id=21 loaded: 0xde200000 - 0xde277308
INFO: BL2: Skip loading image id 22
INFO: BL2: Loading image id 23
INFO: Loading image id=23 at address 0xc0400000
INFO: Image id=23 loaded: 0xc0400000 - 0xc040f418
INFO: BL2: Skip loading image id 26
INFO: BL2: Loading image id 5
INFO: Loading image id=5 at address 0xc0000000
INFO: Image id=5 loaded: 0xc0000000 - 0xc00e4534
NOTICE: BL2: Booting BL32
INFO: Entry point address = 0xde200000
INFO: SPSR = 0x1d3
I/TC: Early console on UART#4
I/TC: 
I/TC: Non-secure external DT found
I/TC: Embedded DTB found
I/TC: OP-TEE version: 3.16.0-dev (gcc version 11.2.0 (GCC)) #1 Fri 28 Jan 2022 02:28:18 PM UTC arm
I/TC: WARNING: This OP-TEE configuration might be insecure!
I/TC: WARNING: Please check https://optee.readthedocs.io/en/latest/architecture/porting_guidelines.html
I/TC: Primary CPU initializing
I/TC: WARNING: All debug access are allowed
I/TC: Platform stm32mp1: flavor PLATFORM_FLAVOR - DT stm32mp135f-dk.dts
I/TC: DTB enables console (non-secure)
I/TC: Primary CPU switching to normal world boot
optee optee: OP-TEE: revision 3.16 (d0b742d1)

When we compare the traces with the below one (which I took from "Execute basic commands" page), things are different starting from "Starting kernel ..." section:

But I still don't understand what caused this problem, since I did everything according to the "Modify, rebuild and reload the Linux® kernel" page.

Thanks.

Gregory PLANCHON

ST Employee

Hi,

There seems to be a problem in your configuration, as you can see from this message

gc2145@3c node not found - DT update aborted

Could you please try again and share with me the commands you use and the logs you get?

at the same time can you make sure you're aligned with the correct kernel version.
I see in your logs that you're on 4.X. Have you taken care to use a kernel compatible with this one (kernel 5.15)?

Regards,

Grégory

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