Recompiling Display Kernel Modules

Prerequisites

To recompile display kernel modules

  1. The NVIDIA-kernel-module-source-<Version>.tar.xz source code is supplied as a .xz file. Untar the file. Its location is <NV_WORKSPACE>/drive-linux_src/.
  2. Export the required variables as per the Linux kernel compilation steps:
    export ARCH=arm64
export LOCALVERSION="-tegra"
export CROSS_COMPILE=<NV_WORKSPACE>/toolchains/aarch64--glibc--stable-2020.08-1/bin/aarch64-linux-
  3. cd <NV_WORKSPACE>/drive-linux_src/NVIDIA-kernel-module-source-<Version>
  4. export IGNORE_PREEMPT_RT_PRESENCE = 1
  5. Make the modules with following command:
    make \
    modules \
    SYSSRC=<KERNELSRC> \
    SYSOUT=<KERNELSRC_OUTDIR> \
    CC=<NV_WORKSPACE>/toolchains/aarch64--glibc--stable-2020.08-1/bin/aarch64-linux-gcc \
    LD=<NV_WORKSPACE>/toolchains/aarch64--glibc--stable-2020.08-1/bin/aarch64-linux-ld.bfd \
    AR=<NV_WORKSPACE>/toolchains/aarch64--glibc--stable-2020.08-1/bin/aarch64-linux-ar \
    CXX=<NV_WORKSPACE>/toolchains/aarch64--glibc--stable-2020.08-1/bin/aarch64-linux-g++ \
    OBJCOPY=<NV_WORKSPACE>/toolchains/aarch64--glibc--stable-2020.08-1/bin/aarch64-linux-objcopy \
    TARGET_ARCH=aarch64 \
    ARCH=arm64
  6. Modules are built under <NV_WORKSPACE>/drive-linux_src/NVIDIA-kernel-module-source-<Version>/kernel-open.