Changing linux kernel boot parameters on Drive-PX2

Autonomous Vehicles DRIVE PX 2 DRIVE - Linux
1

Hi,

I would like to add certain linux kernel boot options and reboot the system. I do not want to re-flash the system. On systems with grub, I used to add through the grub options. Was just curious how to add/remove/change linux kernel boot options on Drive-pX2 without flashing the system.

From the boot up logs on the console, it looks like MB2(TBoot-BCMP) is used, which I assume then loads u-boot to load the kernel. Not sure how to break in here and set the kernel boot options. Tried pressing “Esc” during boot, but it did not help.

Thanks
Anup

2

Dear anup.pemmaiah,

Could you please refer to below link for this topic? Thanks.

Then download the kernel only without flashing the entire RFS and NOR using the bootburn “-R” option – bootburn.sh -b -R

3

Hi Steve,

Really appreciate your response.I have couple of follow up questions, to get a better understanding based on your above comments. I have been following the link that you have pointed out to flash the boards all the time. Thank you for pointing out the “-R” bootburn option. Before I go ahead with your suggested method, just wanted to share the exact steps that I have been following to flash the board and what should I do next.

Process that I have been following to flash my board

  1. Compile the kernel as per the link(Autonomous Vehicle Development Platforms | NVIDIA Docs)

  2. I have been just building the kernels. So I do steps 1-9 as per the link

  3. I then flash the board with the following command to flash tegra-b

bootburn.sh -b p2379c01-t186b -l

Now to set Kernel boot options

Question-1: Is there a way to break into the boot loader on the target during reboot and set the kernel boot option and then continue loading the kernel and bring the system up?

Question-2: If the answer to Question-1 is “NO”, then the next step I assume is the one you have suggested.

I have pasted the steps below that I am planning to follow. Please let me know if they are the correct steps.

Step-1: On the host
Set the correct os_args in vibrante-t186ref-foundation/pct/p2379c01-t186b/linux/linux_storage.cfg

Step-2: On the host
bootburn.sh -b p2379c01-t186b -R

Your comments will be very helpful.

4

Dear anup.pemmaiah,

Your step under Question-2 are the way to go, this should work. Thanks.