In r24.2 updating the DTB was as simple as copying the new version to /boot/ on the TX and rebooting.
In r28.1 things got more complicated requiring you to put the board into recovery mode and re-flash the DTB partition using:
sudo ./flash.sh -r -k DTB jetson-tx1 mmcblk0p1
Now in r28.2 has this changed again? Flashing the DTB using the above command doesn’t update it anymore. I had to reflash the entire board just to get my new DTB in.
sudo ./flash.sh jetson-tx1 mmcblk0p1