Which dtb file is used for orin nx platform

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin NX
1

Hi expters,

I download Jetson_Linux_r36.4.3_aarch64.tbz2 https://developer.nvidia.com/downloads/embedded/l4t/r36_release_v4.3/release/Jetson_Linux_r36.4.3_aarch64.tbz2
And then burn orin nx with below command
sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device nvme0n1p1 -c tools/kernel_flash/flash_l4t_t234_nvme.xml -p “-c bootloader/generic/cfg/flash_t234_qspi.xml” --showlogs --network usb0 p3768-0000-p3767-0000-a0-nvme external

after board boots up, I found out there are lots of dtb and dtbo files in /boot DIR
could you please tell which dtb file is used and which part of code load the dtb and kernel?
I am not familiar with uefi, I used u-boot before

I also run below command, is there any doc to show what is saved in below partitions?
And how to mount the “Microsoft basic data” type partitions
~$ sudo fdisk -l
…
Device Start End Sectors Size Type
/dev/nvme0n1p1 3050048 500118151 497068104 237G Microsoft basic data
/dev/nvme0n1p2 40 262183 262144 128M Microsoft basic data
/dev/nvme0n1p3 262184 263719 1536 768K Microsoft basic data
/dev/nvme0n1p4 263720 328487 64768 31.6M Microsoft basic data
/dev/nvme0n1p5 328488 590631 262144 128M Microsoft basic data
/dev/nvme0n1p6 590632 592167 1536 768K Microsoft basic data
/dev/nvme0n1p7 592168 656935 64768 31.6M Microsoft basic data
/dev/nvme0n1p8 656936 820775 163840 80M Microsoft basic data
/dev/nvme0n1p9 820776 821799 1024 512K Microsoft basic data
/dev/nvme0n1p10 821800 952871 131072 64M EFI System
/dev/nvme0n1p11 952872 1116711 163840 80M Microsoft basic data
/dev/nvme0n1p12 1116712 1117735 1024 512K Microsoft basic data
/dev/nvme0n1p13 1117736 1248807 131072 64M Microsoft basic data
/dev/nvme0n1p14 1248832 2068031 819200 400M Microsoft basic data
/dev/nvme0n1p15 2068032 3050047 982016 479.5M Microsoft basic data
…

thanks,
LImeng

3

Hi meng.li,

Are you using the devkit or custom board for Orin NX?

Please refer to DTB Support to know how we load DTB.
In JP6.2(r36.4.3), we use the DTB included in uefi binary by default.
If FDT entry has been specified in /boot/extlinux/extlinux.conf, you should use the one under /boot/dtb/kernel_xxxx.dtb.

Please simply refer to partition layout file(i.e. flash_l4t_t234_nvme.xml) for details.

4

@KevinFFF

thanks for your reply.
I will learn the doc DTB Support

I don’t use customer board.
I have a orin nano development and orin nx module, and then I combine the orin nano carrier (P3768-0000) and orin nx module (P3767-0000) together.

thanks,
LImeng

5

Okay, you can also check the full flash log to know which DTB file used to flash your devkit.

7

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