Flashing DTB on Jetson TX2 / L4T 32.4.4

[blevinstein]

Based on this post

method to modify/use different device tree in R28.1

The dtb file is used in different locations now. Some of its content has moved to the boot loader itself, so this file named in extlinux.conf or found in “/boot” is not a complete reflection of what your system used. See the above posts about using flash instead of extlinux.conf. You’ll see in the posts earlier in this thread what basically is an evolution of getting both the TX1 and TX2 to use the same R28.1 L4T version (the driver packages differ, but the kernel and rootfs are now the same). …

I am aware that the DTB is stored in multiple places. It is perhaps notable that my kernel-and-DTB flashing flow does not appears to modify /boot/dtb/tegra186-quill-p3310-1000-c03-00-base.dtb.

I also tried identifying the kernel-dtb partition on my TX2 and flashing directly using dd as suggested in this post

How to use UART0 as normal uart port on R28.1?

Hi Arlen0615, Please try to put the dtb into kernel-dtb area using dd on TX2: sudo dd if=your_dtb.dtb of=/dev/mmcblk0p15 And remove the “FDT” line in the extlinux.conf. I heard that the DTB will be used by both kernel and u-boot, so the “FDT” way doesn’t fully work as it can’t pass the DTB to u-boot.

but that left my TX2 in an unbootable state.