u-boot 2022-07 on STM32F746G-DISCO

[Patrice CHOTARD]

Hi Waldemar

On 9/20/22 01:12, Waldemar Brodkorb wrote:
> Hi Simon,
> Simon Glass wrote,
> 
>> Hi Waldemar,
>>
>> On Mon, 19 Sept 2022 at 13:48, Waldemar Brodkorb <wbx at openadk.org> wrote:
>>>
>>> Hi again,
>>>
>>> Waldemar Brodkorb wrote,
>>>
>>>> Hi,
>>>>
>>>> I am trying to run u-boot on a STM32F746G-DISCO device.
>>>> I am configuring u-boot with stm32f746-disco_spl_defconfig.
>>>>
>>>> But nothing happens on the LCD nor on the serial console.
>>>> I use screen /dev/ttyACM0 115200 under Linux to connect.
>>>
>>> It seems my USB port on my laptop was buggy, after reboot I get
>>> following output via serial console:
>>>
>>> U-Boot SPL 2022.07 (Sep 19 2022 - 13:20:08 +0200)
>>> Trying to boot from XIP
>>>
>>>
>>> U-Boot 2022.07 (Sep 19 2022 - 13:20:08 +0200)
>>>
>>> Model: STMicroelectronics STM32F746-DISCO board
>>> DRAM:  8 MiB
>>> Hard fault
>>> pc : 080087d6    lr : c05aa775    xPSR : a1000000
>>> r12 : 00000010   r3 : 080087c1    r2 : 0805344d
>>> r1 : 08008001    r0 : c05aa000
>>> Resetting CPU ...
>>>
>>> resetting ...
>>>
>>> I get a Hard fault. I then tried an older version of u-boot using
>>> the information from https://github.com/fdu/STM32F746G-disco_Buildroot
>>> as a hint. With U-Boot 2018.11 I get a working binary (I had to
>>> disable Falcon mode):
>>>
>>> U-Boot SPL 2018.11 (Sep 19 2022 - 13:41:50 +0200)
>>> Trying to boot from XIP
>>>
>>>
>>> U-Boot 2018.11 (Sep 19 2022 - 13:41:50 +0200)
>>>
>>> Model: STMicroelectronics STM32F746-DISCO board
>>> DRAM:  8 MiB
>>> Flash: 1 MiB
>>> MMC:   sdio at 40012c00: 0
>>> In:    serial
>>> Out:   serial
>>> Err:   serial
>>> usr button is at LOW LEVEL
>>> Net:
>>> Warning: ethernet at 40028000 (eth0) using random MAC address -
>>> fe:f8:94:5f:5e:26
>>> eth0: ethernet at 40028000
>>> Hit SPACE in 3 seconds to stop autoboot.
>>> Wrong Image Format for bootm command
>>> ERROR: can't get kernel image!
>>> U-Boot >
>>>
>>> Seems like a regression to me.
>>
>> Yes, can you use git bisect to find it?
> 
> cd82f199852d88218e1f17f5ec07cdd9112a89c4 is the first bad commit.

I remember i encountered an issue with patch in the past and by updating my toolchain
everything goes fine.

Which toolchain version do you use ?

On my side i am using this one :
https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/11.1.0/x86_64-gcc-11.1.0-nolibc-arm-linux-gnueabi.tar.xz

Patrice


> 
> When I revert this commit on master I get:
> U-Boot SPL 2022.10-rc5-00001-gdbcc7add19-dirty (Sep 20 2022 -
> 00:59:21 +0200)
> Trying to boot from XIP
> 
> 
> U-Boot 2022.10-rc5-00001-gdbcc7add19-dirty (Sep 20 2022 - 00:59:21
> +0200)
> 
> Model: STMicroelectronics STM32F746-DISCO board
> DRAM:  8 MiB
> stm32fx_rcc_clock rcc at 40023800: set_rate not implemented for clock
> index 4
> stm32fx_rcc_clock rcc at 40023800: set_rate not implemented for clock
> index 4
> stm32fx_rcc_clock rcc at 40023800: set_rate not implemented for clock
> index 4
> Core:  38 devices, 22 uclasses, devicetree: separate
> Flash: 1 MiB
> MMC:   sdio1 at 40012c00: 0
> Loading Environment from nowhere... OK
> In:    serial
> Out:   serial
> Err:   serial
> usr button is at LOW LEVEL
> Net:
> Warning: ethernet at 40028000 (eth0) using random MAC address -
> 7e:cf:cf:fc:30:4a
> eth0: ethernet at 40028000
> Hit SPACE in 3 seconds to stop autoboot.
> MMC: no card present
> 
> looks good without the problematic commit.
> 
> best regards
>  Waldemar