[U-Boot] Jetson TX2 hangs during dhcp boot

[Stephen Warren]

On 6/14/19 11:09 AM, Mian Yousaf Kaukab wrote:
> Hi,
> I am seeing a hang with dhcp boot on Jetson TX2. Its running firmware from
> L4T 32.1 with U-Boot from master branch (c2ea87883e) with [1] applied.
> 
> I use following command sequence at u-boot prompt to boot:
> 
> Tegra186 (P2771-0000-500) # setenv ftdfile tegra186-p2771-0000.dtb
> Tegra186 (P2771-0000-500) # setenv boot_targets dhcp
> Tegra186 (P2771-0000-500) # boot
> 
> Last thing I see is the following error from TF-A and the board hangs:

What is TF-A?

> U-Boot 2019.07-rc4-00137-g6fefd9c475 (Jun 14 2019 - 16:27:34 +0200)
...
> TFTP from server xx.xx.xx.xx; our IP address is xx.xx.xx.xx
> Filename 'aarch64/grub.efi'.
> Load address: 0x80280000
...
> MMC: no card present
> Scanning disk sdhci at 3400000.blk...
> Disk sdhci at 3400000.blk not ready
> Scanning disk sdhci at 3460000.blk...
> Found 32 disks
> copying carveout for /host1x at 13e00000/display-hub at 15200000/display at 15200000...
> copying carveout for /host1x at 13e00000/display-hub at 15200000/display at 15210000...
> copying carveout for /host1x at 13e00000/display-hub at 15200000/display at 15220000...
> ERROR:   ARI request timed out: req 89 on CPU 4
> ASSERT: plat/nvidia/tegra/soc/t186/drivers/mce/ari.c <127> : retries != 0U

That file doesn't exist in U-Boot; I guess it's part of grub.efi? So, 
this isn't a hang in U-Boot at all. You'd have to get support for that 
from the authors of Grub I guess.