File replace issue after change builtin module to loadable module

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

Hi everyone.

I successfully compiled max9295, max9296 and imx390 from builtin module to loadable module( They do not exist in modules.builtin)

I used to replace Image and tegra194-p2888-0001-p2822-0000.dtb according to Leopard imaging. But if I change them into loadable modules, which file should I replace before I flash kernel-dtb and kernel?

Thanks in advance

3

Have a check the flash log to find the dtb file name for your Xavier. Like below.
And for the kernel Image you can copy it to Xavier and modify the /boot/extlinux/extlinux.conf to load your Image.

[  96.0785 ] Writing partition DTB-1 with tegra210-jetson-tx1-p2597-2180-a01-devkit.dtb.encrypt
[  96.1089 ] [................................................] 100%
[  96.1378 ] Writing partition TOS-1 with tos-mon-only.img.encrypt
[  96.1801 ] [................................................] 100%
[  96.1936 ] Writing partition EKS-1 with eks.img
[  96.2302 ] [................................................] 100%
[  96.2419 ] Writing partition LNX-1 with boot.img.encrypt
[  96.2783 ] [................................................] 100%
[  96.3077 ] Writing partition BMP with bmp.blob
[  96.3389 ] [................................................] 100%
[  96.3674 ] Writing partition RP4 with rp4.blob
[  96.4048 ] [................................................] 100%
[  96.4651 ] 
[  96.4660 ] tegradevflash --write BCT P2180_A00_LP4_DSC_204Mhz.bct
[  96.4672 ] Cboot version 00.01.0000
[  96.5374 ] Writing partition BCT with P2180_A00_LP4_DSC_204Mhz.bct
[  96.5380 ] [................................................] 100%
[  96.9676 ] 
[  96.9677 ] Flashing completed

[  96.9678 ] Coldbooting the device
[  96.9690 ] tegradevflash --reboot coldboot
[  96.9702 ] Cboot version 00.01.0000
*** The target t210ref has been flashed successfully. ***
Reset the board to boot from internal eMMC.
4

Thank you for your reply.

After I finished compiling kernel. I replaced Image and tegra194-p2888-0001-p2822-0000.dtb just like before. Then I flashed the kernel-dtb and kernel.

I replaced Image file in /boot according to /boot/extlinux/exlinux.conf and reboot. But in my Xavier, modules.builtin still has imx390.ko, max9295.ko and max9296.ko

Does loadable module need to add some code in dts or dtb file?

5

Have try just remove it from the modules.builtin list?

6

Thanks. It works. But when I want to rmmod them. It said rmmod: ERROR: Module imx390 is builtin.

7

What’s below command shows.
modinfo imx390

8

Sorry for the delay. This is modinfo of imx390.ko

filename:       /lib/modules/4.9.140-tegra/kernel/drivers/media/i2c/imx390.ko
license:        GPL v2
author:         Sudhir Vyas <svyas@nvidia.com
author:         NVIDIA Corporation
description:    Media Controller driver for Sony IMX390
alias:          of:N*T*Cnvidia,imx390C*
alias:          of:N*T*Cnvidia,imx390
alias:          i2c:imx390
depends:        max9296,max9295
intree:         Y
vermagic:       4.9.140-tegra SMP preempt mod_unload modversions aarch64
parm:           test_mode:int
9

How is it go on,bro？I meet the same builtin problem.

10

Have reference to below relative topic.