How can I compile a kernel? Jetpack 4.2.2

Sorry for the poor English.
The built-in kernel does not recognize the USB device and requires kernel compilation.

I would like to know what process to proceed.

Hi kirabbitrwte9,

Please refer to L4T doc:

Don’t forget that if you can compile a kernel module, instead of modifying the kernel itself, then install is just a file copy. Regardless, always save a pristine protected copy of the current running system’s “/proc/config.gz” (other than CONFIG_LOCALVERSION this is an exact copy of that kernel’s configuration…which usually beats “make tegra_defconfig”).