# Reference: <https://postmarketos.org/vendorkernel>
# Kernel config based on: arch/arm/configs/msm8974_sec_defconfig
#                         arch/arm/configs/msm8974pro_sec_klte_eur_defconfig
#                         arch/arm/configs/selinux_defconfig

pkgname="linux-samsung-klte"
pkgver=3.4.113
pkgrel=0
pkgdesc="Samsung Galaxy S5 kernel fork"
arch="armhf"
_carch="arm"
_flavor="samsung-klte"
url="https://kernel.org"
license="GPL-2.0-only"
options="!strip !check !tracedeps"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev xz dtbtool devicepkg-dev gcc6"

# Compiler: GCC 6 (doesn't boot when compiled with newer versions)
if [ "${CC:0:5}" != "gcc6-" ]; then
	CC="gcc6-$CC"
	HOSTCC="gcc6-gcc"
	CROSS_COMPILE="gcc6-$CROSS_COMPILE"
fi

# Source
_repository="android_kernel_samsung_msm8974"
_commit="7a3b6080ee8d411acc2bb4a08de479aa8cc9c77a"
_config="config-${_flavor}.${arch}"
source="
	$pkgname-$_commit.tar.gz::https://github.com/LineageOS/${_repository}/archive/${_commit}.tar.gz
	$_config
	00_fix_return_address.patch
	01_gpu-msm-fix-gcc5-compile.patch
	02-Reduce-battery-and-touchscreen-log-spam.patch
"
builddir="$srcdir/${_repository}-${_commit}"

prepare() {
	default_prepare
	downstreamkernel_prepare "$srcdir" "$builddir" "$_config" "$_carch" "$HOSTCC"
}

build() {
	unset LDFLAGS
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS"

	# Generate master DTB
	dtbTool -s 2048 -p "scripts/dtc/" -o "arch/arm/boot/dt.img" "arch/arm/boot/"
}

package() {
	# kernel.release
	install -D "$builddir/include/config/kernel.release" \
		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"

	# zImage (find the right one)
	cd "$builddir/arch/$_carch/boot"
	_target="$pkgdir/boot/vmlinuz-$_flavor"
	for _zimg in zImage-dtb Image.gz-dtb *zImage Image; do
		[ -e "$_zimg" ] || continue
		msg "zImage found: $_zimg"
		install -Dm644 "$_zimg" "$_target"
		break
	done
	if ! [ -e "$_target" ]; then
		error "Could not find zImage in $PWD!"
		return 1
	fi

	# Master DTB
	install -Dm644 "$builddir/arch/arm/boot/dt.img" \
		"$pkgdir/boot/dt.img"

	# External modules install
	cd "$builddir"
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS" \
		INSTALL_MOD_PATH="$pkgdir" modules_install
}

sha512sums="a0ed01d4beb4fd1b304ea1409e4e3d7ff60662de34999dcdb2901cb10eef217a6679d5cc42dfcc9c3e2b9fb96bc38a8adc431444092310e22af29c7d581f60af  linux-samsung-klte-7a3b6080ee8d411acc2bb4a08de479aa8cc9c77a.tar.gz
3045e613475bcdb454315450c86ca3198787ff0f4573a61118a6a600048d1d9b45d6c83c1804d4945bcf24af8759a038d9f2b5bf57aa7ab8b3585be65ffd4f7a  config-samsung-klte.armhf
3b4913415bcfe0ff222969f993890c656c7e12b6ee06532bded485d5201c9855b2c87996c5b63423702b89b6b0ca214b5aceeb402571d9c5af084093c157ccb4  00_fix_return_address.patch
0fc4b1782dfd3bd94fa9ae8ab74b19713f25e9f4a48dcf830072634f247aa3dd8847f001a3e87e9728e057657efd4ae751510e7c408d9b960c907665ca64e61f  01_gpu-msm-fix-gcc5-compile.patch
b55fc9ab3e21bc85d66ee08d7e1cd7fdc3b236249212fbcd0055e60ed3e6cef3e4d2b8058a4b7d70c78b2bbc7a11111b55d4d82490b4e3579b8e61657806ac09  02-Reduce-battery-and-touchscreen-log-spam.patch"