samsung-a6lte: WIP mainline support (MR 3925)

Currently display (simplefb), touchscreen, eMMC & SD card are working.

[ci:skip-build]: already built successfully in CI

device/testing/device-samsung-a6lte/APKBUILD

@@ -1,7 +1,7 @@
 # Reference: <https://postmarketos.org/devicepkg>
 pkgname=device-samsung-a6lte
 pkgdesc="Samsung Galaxy A6 2018"
-pkgver=0.3
+pkgver=0.4
 pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
@@ -9,11 +9,8 @@ arch="aarch64"
 options="!check !archcheck"
 depends="
 	alsa-utils
-	linux-samsung-a6lte
 	mkbootimg
 	msm-fb-refresher
-	pipewire
-	pipewire-pulse
 	postmarketos-base
 	samsungipcd
 	util-linux
@@ -38,9 +35,14 @@ source="
 	usr-share-alsa-ucm2-conf.d-Universal7870-I-VoiceCall.conf
 	usr-share-pipewire-media-session.d-alsa-monitor.conf
 "
-subpackages="$pkgname-nonfree-firmware:nonfree_firmware"
+subpackages="
+	$pkgname-kernel-downstream:kernel_downstream
+	$pkgname-kernel-mainline:kernel_mainline
+	$pkgname-nonfree-firmware:nonfree_firmware
+"
 
 # pulseaudio does not seem to work on this device. Will use pipewire-pulse instead.
+# (For downstream kernel, mainline does not have audio yet and I'd like to run Phosh)
 
 build() {
 	devicepkg_build $startdir $pkgname
@@ -60,6 +62,18 @@ package() {
 	install -Dm644 usr-share-pipewire-media-session.d-alsa-monitor.conf "$pkgdir"/usr/share/pipewire/media-session.d/alsa-monitor.conf
 }
 
+kernel_downstream() {
+	pkgdesc="Working: display, touchscreen, wifi, audio, cellular"
+	depends="linux-samsung-a6lte pipewire pipewire-pulse"
+	devicepkg_subpackage_kernel $startdir $pkgname $subpkgname
+}
+
+kernel_mainline() {
+	pkgdesc="Close-to-mainline WIP (display and touchscreen works)"
+	depends="linux-postmarketos-exynos7870"
+	devicepkg_subpackage_kernel $startdir $pkgname $subpkgname
+}
+
 nonfree_firmware() {
 	pkgdesc="Wifi firmware"
 	depends="firmware-samsung-a6lte"

device/testing/linux-postmarketos-exynos7870/APKBUILD

@@ -0,0 +1,83 @@
+# Kernel config based on defconfig
+
+pkgname=linux-postmarketos-exynos7870
+pkgver=6.2.1
+pkgrel=0
+pkgdesc="Close-to-mainline kernel for Samsung Galaxy A6 2018"
+arch="aarch64"
+_carch="arm64"
+_flavor="exynos7870"
+url="https://kernel.org"
+license="GPL-2.0-only"
+options="!strip !check !tracedeps pmb:cross-native"
+makedepends="
+	bash
+	bc
+	bison
+	dtbtool-exynos
+	flex
+	openssl-dev
+	perl
+"
+
+_patches_repo="https://gitlab.com/sleirsgoevy/a6lte-mainline"
+_patches_repo_commit="58a5a02739abf77adf62902c141d0383f7de7172"
+_config="config-$_flavor.aarch64"
+# Source
+source="
+	linux-$pkgver.tar.gz::https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-$pkgver.tar.gz
+	$_config
+	patches-$_patches_repo_commit.tar.gz::$_patches_repo/-/archive/master/a6lte-mainline-$_patches_repo_commit.tar.gz
+"
+builddir="$srcdir/linux-$pkgver"
+_outdir="."
+
+prepare() {
+	default_prepare
+	for i in "$srcdir"/a6lte-mainline-*/patches/*; do
+		patch -p1 < "$i"
+	done
+	cp "$srcdir"/$_config .config
+}
+
+build() {
+	unset LDFLAGS
+	make ARCH="$_carch" CC="${CC:-gcc}" \
+		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS"
+
+	# Build out-of-tree devicetrees
+	for i in "$srcdir/"a6lte-mainline-*/*.dts; do
+		scripts/dtc/dtc "$i" -o "$_outdir/arch/$_carch/boot/dts/$(basename -s .dts "$i").dtb"
+	done
+
+	# Master DTB (deviceinfo_bootimg_qcdt)
+	dtbTool-exynos -o "$_outdir/arch/$_carch/boot"/dt.img \
+		$(find "$_outdir/arch/$_carch/boot/dts/" -name 'exynos7870-*.dtb')
+}
+
+package() {
+	mkdir -p "$pkgdir/boot" "$pkgdir/lib/modules"
+
+	# The bootloader does not support zipped kernels
+	make install modules_install \
+		ARCH="$_carch" \
+		INSTALL_PATH="$pkgdir"/boot \
+		INSTALL_MOD_PATH="$pkgdir" \
+		INSTALL_MOD_STRIP=1
+	rm -f "$pkgdir"/lib/modules/*/build "$pkgdir"/lib/modules/*/source
+
+	install -D include/config/kernel.release \
+		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
+
+	# Install dt.img
+	install -Dm066 "$_outdir/arch/$_carch/boot/"dt.img "$pkgdir/boot/dt.img"
+
+	# Rename /boot/vmlinux-... to make postmarketos-mkinitfs happy
+	mv "$pkgdir/boot/vmlinux-$pkgver" "$pkgdir/boot/vmlinuz-$pkgver"
+}
+
+sha512sums="
+d7e11f86b5daf09b9764fc710e3b49e2a2b5b4cd1c74ca3f009d396337f8c20cd3969d1c334bdf0e992acdd1d5c650474a11dddf473f3846e86c1a1649085ce4  linux-6.2.1.tar.gz
+4407a2606acc3a35019a45ed1c371543765ee89c865b80ba65791eff191f1401fd49cc7cfade385ffbb19b9dc9b7fb7d78751e796653be3c15b779db99d336a5  config-exynos7870.aarch64
+1819881ee8de1b2fc04dfb288bf131ad5998f6cf40d27ae523049a30b01a8edfd26df6970186b725a7ace03bf9bab28bbc26876b4932931259059d63df088de9  patches-58a5a02739abf77adf62902c141d0383f7de7172.tar.gz
+"