How to override Linux defconfig for NXP i.MX8 linux-imx package in Yocto Kirkstone

[philbot991]

I am using Yocto to produce a build for a SolidRun i.MX8 platform. For this I am using the official NXP Kirkstone release with the Linux kernel 5.15.

# Inialize NXP repositories
RUN .bin/repo init -u https://github.com/nxp-imx/imx-manifest.git -b imx-linux-kirkstone -m imx-5.15.71-2.2.0.xml

I have a bbappend in my own layer that I want to override the kernel defconfig with. No matter what I do, the original defconfig is never overridden.

Here is what I have tried so far:

# Include kernel configuration fragment
FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"

SRC_URI += "file://defconfig \
            "

do_configure_append() {
    bbwarn "1.) Applying Linux Kernel configuration fragment ..."
    cat ${WORKDIR}/defconfig >> ${B}/.config
}

KBUILD_DEFCONFIG_imx8mpsolidrun = ""
unset KBUILD_DEFCONFIG

do_copy_defconfig_append () {

    bbwarn "2.) Applying Linux Kernel configuration fragment ..."

    #cp ${WORKDIR}/defconfig ${WORKDIR}/defconfig
    cp ${WORKDIR}/defconfig ${WORKDIR}/build/.config
}

I can see the 'bbwarn' messages on the console, however the defconfig is never overridden.

How can I successfully override the linux-imx defconfig with NXP's official Yocto Kirkstone release? Thanks.

[JosephAtNXP]

Hi,

Thank you for your interest in NXP Semiconductor products,

Did you copy your custom defconfig file?

You can start with a basis from Yocto Project guide.

Also by this advanced guide which also covers customization.

And this knowledge base.

Regards