how to update the device tree and Image on TX2?

I modified the device tree and the kernel ,then I replace /boot/Image and the tegra186-quill-p3310-1000-C03-00-base.dtb ,
But there is no change. and I use sudo . / flash -r -k kernel-dtb jetson-tx2mmblk0p1, the device tree is update , but Image is not update , can you tell me how to do that can update Image ,.

The way to update the actual kernel is just to copy it to “/boot”. Beware though that if this results in a new “uname -r”, then you need modules installed as well or it won’t find them. I suggest leave the original Image and put your new Image there with some alternate name, e.g., “Image-custom”, and then add a new entry in extlinux.conf (you can test it first with serial console to select the new entry…or if you are brave, then just set the new “default” to this entry).

Previous to R28.1 you could put the dtb file in “/boot” as well, but you did the right thing with the flash step for R28.1 (this particular flash command puts the dtb in a partition).