How to update dtb partition only from device

Autonomous Machines Jetson & Embedded Systems Jetson TX2
#1

Hi,

I’m using TX2NX with JP 4.6.1, cboot as main bootloader. Secure boot enabled, SKBPKC, also kernel/dtb encryption and disk encryption.
My product has several variants (uses the same TX2NX + carrier board design, just different in add-on devices) , so I plan to have multiple DTB, one for each variant.

Can I generate BUP binary for dtb only (at image creating time) and flash specific DTB file into kernel-dtb or kernel-dtb_b on the device? And can you please guide me how to do that? Thank you.

#3

hello HnilND,

you cannot perform partition update once you have SecureBoot enabled.

1 Like
#4

Hi Jerry,

So, the only way I can do is generate multiple bl_update_payload/full_init_payload versions, and once I want to use different DTB, need to update full corresponding payload file? This will uses spaces in firmware files.

Can cboot load & apply DTBO on TX2NX? Is there anyway you can think of to have different DTB/DTBO in a single BUP payload?
Thank you.

#5

hello HnilND,

yes, you should be able to generate secure BUP in a secured environment for updating the target.

#6

Thanks Jerry.

Do you have any idea about my later concerns Can cboot load & apply DTBO on TX2NX? Is there anyway you can think of to have different DTB/DTBO in a single BUP payload??

#7

Is this still an issue to support? Any result can be shared? Thanks

#8

Hi. I’m able to generate multiple BUPs, each contains one dtb.

But I’m still looking for a better solution, where single BUP can contain multiple DTBs, or applying DTBO in cboot-t18x. Do you have any ideas about this?

#9

hello HnilND,

please refer to Updating an Individual Partition session.
you may try using nv_part_update to perform an individual partition update.
thanks

#11

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