[U-Boot] Jetson TX2 hangs during dhcp boot

[Stephen Warren]

On 6/16/19 1:46 PM, Mian Yousaf Kaukab wrote:
> On Fri, Jun 14, 2019 at 05:26:05PM +0000, Varun Wadekar wrote:
>>>> ERROR:   ARI request timed out: req 89 on CPU 4
>>>> ASSERT: plat/nvidia/tegra/soc/t186/drivers/mce/ari.c <127> : retries
>>>> != 0U
>>
>> This time out means that TEGRA_ARI_ROC_FLUSH_CACHE_TRBITS ARI call timed out. Looks like the firmware responsible for handling this ARI call is stuck or overloaded and not servicing any calls.
> Any thoughts on how to debug it?
> 
> I couldn't get upstream TF-A to work. Here is how I am building it:
> make CROSS_COMPILE=aarch64-linux-gnu- PLAT=tegra TARGET_SOC=t186 DEBUG=1 all
> 
> then I build tos.img as following:
> ./gen_tos_part_img.py bl31.bin JetPack_4.2_Linux_P3310/Linux_for_Tegra/bootloader/tos.img
> 
> (try to)flash as following:
> ./flash.sh -k secure-os jetson-tx2 mmcblk0p1
> 
> However, I can't get flashing to work as soon as tos.img from R32.1 is
> replaced with my build. Is upstream TF-A supposed to work with R32.1?

I personally wouldn't /expect/ anything except our downstream versions 
of ATF and Trusty to work, but they might if you're lucky. I believe 
we're quite close to (some version of) upstream for ATF so upstream ATF 
/might/ work (but I don't believe we test it, so no guarantees). For 
Trusty I'm less sure we're close to any particular upstream version 
these days, so I wouldn't count on much.