Hi Manu
On Tue, 2023-05-09 at 09:49 +0000, Traut Manuel LCPF-CH wrote:
Hi Marc,
Thanks for your quick reply.
I am not sure if I built/using u-boot as intended for this platform.
I would advice to stick to the documentation [1].
Thanks for the reference.
You are very welcome.
- running via serial download:
Please note that we never integrated/validated USB device support on Verdin iMX8M Mini (and Plus for that matter). So one really can NOT use UUU with upstream U-Boot so far and does have to stick to what we document.
Thanks for the clarification. I am aware of this and added this just for reference to see that generally the SPL seems to work. I worked on this a couple of months ago [3] - however the base-address of the controller needs to be retrieved somehow in the probe function. Here it was just hardcoded.
Okay, I haven't played with that upstream yet. But I should!
- running from SDCard:
As all our SoMs are factory fused to boot from their on-module eMMC storage one can NOT boot them from an SD card.
Thanks for the information. I thought SDCard boot might work, cause of the following found in [4] --8<-- Important: make sure that there is no bootable SD card plugged into the slot. Otherwise, the module will try to boot from the external SD card instead of going into the USB serial loader. --8<--
I believe this reference refers to what NXP calls manufacturer boot which only applies to non-fused modules. As regular modules are always factory fused this does not really apply. However, I guess a customer could potentially order non-fused ones as part of a build-to-order (BTO) or something so to be on the safe side we added that note.
- running from eMMC:
Please stick to the documentation and skip 2 blocks when writing to the first hardware area boot partition.
Thanks - this helps. However it seems that the SPL build with the defconfig expects the 2nd stage u-boot from mmc 1 instead of 0 --8<-- U-Boot SPL 2023.04+dfsg-1+iris+manut4 (May 03 2023 - 12:16:03 +0000) WDT: Started watchdog@30280000 with servicing every 1000ms (60s timeout) Trying to boot from MMC1 --8<-- Guess I get this fixed on my own.
No, I believe your issue lays with TF-A. However, I just checked and latest master does really work for meTM (;-p).
U-Boot SPL 2023.07-rc2-00084-g177e506952a (May 15 2023 - 12:09:06 +0200) WDT: Started watchdog@30280000 with servicing every 1000ms (60s timeout) Trying to boot from MMC1 NOTICE: Do not release JR0 to NS as it can be used by HAB NOTICE: BL31: v2.8(release):v2.9-rc0 NOTICE: BL31: Built : 12:08:36, May 15 2023
U-Boot 2023.07-rc2-00084-g177e506952a (May 15 2023 - 12:09:06 +0200)
CPU: Freescale i.MX8MMQ rev1.0 1600 MHz (running at 1200 MHz) CPU: Industrial temperature grade (-40C to 105C) at 49C Reset cause: POR DRAM: 2 GiB Core: 147 devices, 24 uclasses, devicetree: separate WDT: Started watchdog@30280000 with servicing every 1000ms (60s timeout) MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2 Loading Environment from MMC... OK In: serial@30860000 Out: serial@30860000 Err: serial@30860000 Model: Toradex 0055 Verdin iMX8M Mini Quad 2GB WB IT V1.1A Serial#: 06827787 Carrier: Toradex Verdin Development Board V1.1A, Serial# 10807609 Setting variant to wifi Net: eth0: ethernet@30be0000 Hit any key to stop autoboot: 0 Verdin iMX8MM #
Good luck!
If anything goes wrong the boot ROM usually falls back to serial download mode. There are ways to look at what exactly you may have done wrong see e.g. [2].[Traut Manuel LCPF-CH]
Oh, this really eases debugging. Thanks for the reference!
You are very welcome.
Thanks Manuel
[1] https://source.denx.de/u-boot/u-boot/-/blob/master/doc/board/toradex/verdin-... [2] https://www.nxp.com/webapp/Download?colCode=AN12853 [3] https://www.mail-archive.com/u-boot@lists.denx.de/msg437039.html [4] https://docs.toradex.com/108681-verdin-imx8m-mini-datasheet-v1.1
Best regards - Mit freundlichen Grüssen - Meilleures salutations
Marcel Ziswiler Software Team Lead - Embedded Linux BSP
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