i.MX8MN (ROMv2) fails to boot over USB

[Tim Harvey]

On Tue, Jan 25, 2022 at 3:49 PM Adam Ford <aford173 at gmail.com> wrote:
>
> I have a flash.bin file that boots over MMC just fine, but when I use
> that same flash.bin file, it appears to hang after running ATF.  I
> dumped some debug info for printing the handling of the FIT file, and
> I noticed the fit read sizes are also not consistent between MMC and
> USB loads with the identical flash.bin.
>
> MMC booting is calling spl_romapi_raw_seekable_read, but the USB
> booting is not.  Maybe this is normal.
>
> I was hoping someone might have some pointers on how I can
> troubleshoot this.  It's also weird to me that the various nodes are
> listed twice in the USB boot, but not the MMC boot.
>
> I have poked around in the spl_imx_romapi.c file, but I am not seeing
> anything obvious.
>
> SPL and ATF are executing, so it's partially decoding the FIT file and
> executing those two pieces correctly from what I can see.
>
> USB log (no FDT)
> U-Boot SPL 2022.01-00753-g7f7f25ecb8-dirty (Jan 25 2022 - 15:54:57 -0600)
> WDT:   Started watchdog at 30280000 with servicing (60s timeout)
> Trying to boot from BOOTROM
> Find img info 0x&48027600, size 872
> Need continue download 1024
> fit read sector 48027600, sectors=872, dst=42206c40, count=872, size=0x368
> firmware: 'uboot'
> External data: dst=40200000, offset=3000, size=a4d98
> fdt: 'fdt'
> External data: dst=402a4dc0, offset=b1e60, size=af68
> loadables: 'atf'
> External data: dst=960000, offset=a7d98, size=a0c6
> no string for index 1
> Download 772040, Total size 773576
> fit read sector 48027600, sectors=872, dst=42206fb0, count=872, size=0x368
> firmware: 'uboot'
> External data: dst=40200000, offset=3000, size=a4d98
> fdt: 'fdt'
> External data: dst=402a4dc0, offset=b1e60, size=af68
> loadables: 'atf'
> External data: dst=960000, offset=a7d98, size=a0c6
> no string for index 1
> NOTICE:  BL31: v2.4(release):lf-5.10.72-2.2.0-0-g5782363f9
> NOTICE:  BL31: Built : 14:45:34, Jan 25 2022
>
> <hang>
>
> MMC Booting Log (with DTB):
>
> U-Boot SPL 2022.01-00753-g7f7f25ecb8-dirty (Jan 25 2022 - 15:54:57 -0600)
> WDT:   Started watchdog at 30280000 with servicing (60s timeout)
> Trying to boot from BOOTROM
> image offset 0x8000, pagesize 0x200, ivt offset 0x0
> ROM API load from 0x60000, size 0x400
> spl_romapi_raw_seekable_read 0x60000, size 0x400
> fit read sector 300, sectors=2, dst=42206c40, count=2, size=0x368
> firmware: 'uboot'
> ROM API load from 0x63000, size 0xa4e00
> spl_romapi_raw_seekable_read 0x63000, size 0xa4e00
> External data: dst=40200000, offset=3000, size=a4d98
> fdt: 'fdt'
> ROM API load from 0x111e00, size 0xb000
> spl_romapi_raw_seekable_read 0x111e00, size 0xb000
> External data: dst=402a4dc0, offset=b1e60, size=af68
> loadables: 'atf'
> ROM API load from 0x107c00, size 0xa400
> spl_romapi_raw_seekable_read 0x107c00, size 0xa400
> External data: dst=960000, offset=a7d98, size=a0c6
> no string for index 1
> NOTICE:  BL31: v2.4(release):lf-5.10.72-2.2.0-0-g5782363f9
> NOTICE:  BL31: Built : 14:45:34, Jan 25 2022
>
> <u-boot loads successfully from here>

Adam,

I've previously run into this as well and unfortunately have no
solution. Note that I had to hack in some support to the SPL for USB
which I assume you've done as well. If I recall trying to enable
DM_USB for the SPL took too much space so that hacks I had revolved
around getting it to work in the non-DM fashion.

Best regards,

Tim