Linking externel driver

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
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1

Hello team,

I m trying to load one of the camera driver on Nvidia Xavier Nx module. To do this,

  1. I have made toolchain setup and extracted source codes
  2. Placed .c file and edited Makefile and Kconfig under path /nx/source/Linux_for_Tegra/source/public/kernel
    /nvidia/drivers/media/i2c/
  3. Then i wanted to disable the default imx219 camera driver. To disable imx219, i commented out the
    #include “tegra194-camera-jakku-rbpcv2-imx219.dtsi”
    line in “tegra194-p3509-0000-a00.dtsi” file

And added my camera dtsi file and included my dtsi in
“tegra194-p3668-common.dtsi” file
but, even after doing this, i notice imx219 dtsi file properties in /proc/device-tree directory

Could you please help me to disable imx219 completely and guide me where and all i have to make changes to include my driver files?

3

hello kamalskdy,

for driver layer, you may update defconfig to disable built this driver, then, its *.o file will not created for your kernel image.
for example, $public_sources/kernel_src/kernel/kernel-5.10/arch/arm64/configs/tegra_defconfig
CONFIG_NV_VIDEO_IMX219=n

and… there’re by default some device tree overlay (*.dtbo) files under /boot/, you may delete those imx219 dtbo files if you would like to disable imx219 completely.

4

yes, we even did changes in tegra_defconfig file but no use.

there is no imx219 dtb0 file in Linux_for_Tegra/rootfs/boot/

5

hello kamalskdy,

may I know which Jetpack release you’re working with?
BTW, they’re *.dtbo, device tree binary overlay files.

6

i m using L4T 32.5.0 version

7

hello kamalskdy,

removing that include of IMX219 from jakku/kernel-dts/common/tegra194-p3509-0000-a00.dtsi should be enough.
you may not update the customize device tree correctly. please share your steps for reference, thanks

8

Hello JerryChang,

Not updated correctly you mean there is something wrong in our dtsi file?

or we didn’t include our dtsi file properly in jakku/kernel-dts/common/tegra194-p3668-common.dtsi file ?

9

hello kamalskdy,

IIRC, Xavier with r32.5 release version was loading device tree binary via kernel-dtb partition.
that you may perform partition flash to update the binary file to this partition individually.

11

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