manual build script for rock5b kernel

build.sh

#!/bin/bash
typeset -A overlay kernel bsp

defconfig="linux-defconfig-full.config"
overlay=(
	[name]="overlay"
	[repo]="https://github.com/radxa/overlays.git"
	[commit]="main"
)
kernel=(
	[name]="kernel"
	[repo]="https://github.com/radxa/kernel.git"
	[commit]="linux-5.10-gen-rkr3.4"
)
bsp=(
	[name]="bsp"
	[repo]="https://github.com/radxa-repo/bsp.git"
	[commit]="main"
)
patches=(
	../bsp/linux/rockchip/0010-backport/000[345]*
	../bsp/linux/rockchip/0020-rock4/000[2345]*
	../bsp/linux/rockchip/0100-vendor/000[1-9]*
	../bsp/linux/rockchip/0100-vendor/0010*
	../bsp/linux/rockchip/0100-vendor/0012*
)


git_clone() {
	declare -n src=$1
	local repo=${src[repo]}
	local commit=${src[commit]}
	if [ ! -f ".${src[name]}_clone.stamp" ]; then
		echo "Cloning Radxa $name repository..."
		git clone --depth=1 --branch=$commit $repo || exit 1
		touch ".${src[name]}_clone.stamp" || exit 1
	fi
}

git_clone overlay
git_clone kernel
git_clone bsp

if [ ! -f ".kernel_overlay.stamp" ]; then
	echo "Applying Radxa overlay..."
	pushd kernel || exit 1
		git checkout -b "${kernel[commit]}-rock5b" || exit 1
		mv -v arch/arm64/boot/dts/rockchip/overlay{,s} || exit 1
		cp -rv ../overlays/arch . || exit 1
		git add -A || exit 1
		git commit -m "Adding overlays from ${kernel[repo]}" || exit 1
	popd || exit 1
	touch ".kernel_overlay.stamp" || exit 1
fi

if [ ! -f ".kernel_patch.stamp" ]; then
	echo "Applying Radxa kernel patches..."
	pushd kernel || exit 1
		for patch in ${patches[@]}; do
			echo "Patch $patch..."
			git am --reject --whitespace=fix "$patch" || exit 1
		done
	popd
	touch ".kernel_patch.stamp" || exit 1
fi

echo "Making the kernel"
cp $defconfig kernel/.config
pushd kernel || exit 1
	make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j9         || exit 1
	make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j9 modules || exit 1
popd || exit 1