Device tree auto reverse to origin after flash done

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi bros,
I flashed dtb with jetson nano by command:

sudo dd if=tegra210-p3448-0000-p3449-0000-a02.dtb.encrypt of=/dev/mmcblk0p10

It work on 1st reboot but after reboot 2nd without dd command above. My device tree reverse to origin.

Any suggest help me.

Thanks.

3

Hello @hoanganhv1svm
Are you sure it worked.? Because the DTB flashing using dd command reflects it changes in the system after a reboot only. Plus You can verify if the intended DTB is flashed by checking the DTB build time after the reboot by command dmesg | grep -i dtb
Also, May I know which L4T Version are you using.?

4

I am wondering what release you are using? There was similar issue on jetpack4.2.1 but should already be resolved in JP4.3 or JP4.4 EA. Need to find out the old topic.

5

Hi Sarath,

I’m sure dd work, “reboot” that mean i flash by dd command and “reboot” 1st time, i can see “/proc/device-tree” changed.
If i “reboot” again without dd command, device tree is reverse to origin.
I’m using Jetpack 4.3

Thanks.

6

Hi Wayne,

I’m using jetpack 4.3. Jetpack 4.2 error similar.
Jetson nano A02, B01 error similar

Thanks.

7

Should be duplicated with this thread.

But your method to update dtb seems not right. It is not encrypted or signed.

1 Like
8

I think my dtb is signed because i found it on:

/bootloader/signed

But you solution above is final solution :)

Thank for your support