Re: [meta-raspberrypi] Problem with RPI_USE_U_BOOT with RaspberryPi4


Jean-Philippe Lebel
 

Hello Marc,

I doubt this is a manipulation issue (at least in regards to burning the image). 

meta-raspberrypi master, yocto master -> works (core-image-base, stock, no modification beside RPI_USE_U_BOOT="1")

meta-raspberrypi hardknott, yocto hardknott -> doesn't work (core-image-base, stock, no modification beside RPI_USE_U_BOOT="1")

That being said, I've inspected both the working image and the non-working one and they look very similar (files and structure). I will take a closer look at the format.

Thanks
-------------
Jean-Philippe Lebel, ing. MBA
jp@...
http://www.lebel.pro
cell: 418-931-3800

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On Fri, Jan 14, 2022 at 3:40 PM Marc Ferland <marc.ferland@...> wrote:
On Fri, Jan 14, 2022 at 10:39 AM Jean-Philippe Lebel <jp@...> wrote:
>
> I finally received my UART cable, giving me more details about where the boot sequence fails.
>
> Just a quick summary of my tests
> - Enabling UART does indeed "fix" the issue when working from the meta-raspberrypi AND yocto master.
> - Enabling UART has no impact when working from the meta-raspberrypi and yocto hardknott branch (which I need to support) - image doesn't boot
> - Backporting the meta-raspberrypi master branch to hardknott does NOT fix the problem.
>
> Here is the uboot log (failing).
>
> U-Boot 2021.01 (Jan 11 2021 - 18:11:43 +0000)
>
> DRAM:  1.9 GiB
> RPI 4 Model B (0xb03114)
> MMC:   mmcnr@7e300000: 1, emmc2@7e340000: 0
> Loading Environment from FAT... ** No partition table - mmc 0 **
> In:    serial
> Out:   serial
> Err:   serial
> Net:   eth0: ethernet@7d580000
> PCIe BRCM: link up, 5.0 Gbps x1 (SSC)
> starting USB...
> Bus xhci_pci: Register 5000420 NbrPorts 5
> Starting the controller
> USB XHCI 1.00
> scanning bus xhci_pci for devices... 2 USB Device(s) found
>        scanning usb for storage devices... 0 Storage Device(s) found
> Hit any key to stop autoboot:  0
> switch to partitions #0, OK
> mmc0 is current device
> ** No partition table - mmc 0 **
> Card did not respond to voltage select! : -110
>
> Here is a normal uboot sequence
>
> U-Boot 2021.10 (Oct 04 2021 - 15:09:26 +0000)
>
> DRAM:  1.9 GiB
> RPI 4 Model B (0xb03114)
> MMC:   mmcnr@7e300000: 1, mmc@7e340000: 0
> Loading Environment from FAT... Unable to read "uboot.env" from mmc0:1... In:    serial
> Out:   vidconsole
> Err:   vidconsole
> Net:   eth0: ethernet@7d580000
> PCIe BRCM: link up, 5.0 Gbps x1 (SSC)
> starting USB...
> Bus xhci_pci: Register 5000420 NbrPorts 5
> Starting the controller
> USB XHCI 1.00
> scanning bus xhci_pci for devices... 2 USB Device(s) found
>        scanning usb for storage devices... 0 Storage Device(s) found
> Hit any key to stop autoboot:  0
> switch to partitions #0, OK
> mmc0 is current device
> Scanning mmc 0:1...
> Found U-Boot script /boot.scr
> 262 bytes read in 6 ms (42 KiB/s)
> ## Executing script at 02400000
> 23202304 bytes read in 997 ms (22.2 MiB/s)
> Saving Environment to FAT... OK
> Moving Image from 0x80000 to 0x200000, end=1960000
> ## Flattened Device Tree blob at 2eff3600
>    Booting using the fdt blob at 0x2eff3600
>    Using Device Tree in place at 000000002eff3600, end 000000002f002f13
>
> Starting kernel ...
>
> Basically, the failing Uboot can't find the partition table.
>

Well is there a partition table? Can you share what you are doing to
flash your uSD? Maybe it's just some manipulation error.

Marc

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