# Vanilla upstream kernel plus the Surface Pro 12" (Snapdragon X1P-42-100)
# patch set from the miasvanklei Gentoo overlay, packaged for Fedora.
#
# Build inputs are produced by make-sources.sh in this directory; see README.md.

# Upstream tarball version. For a release candidate this is the git.kernel.org
# snapshot name (linux-7.3-rc1); for a stable release it is the tarball name
# from cdn.kernel.org (linux-7.2.3).
#
# Both versions here are defaults, for a build driven straight off a checkout.
# The release pipeline reads them out of the git tag it was triggered by and
# passes them in with --define, which takes precedence -- so keep the plain
# `%%global <name> <value>` shape, which make-sources.sh reads with awk.
%if %{undefined upstream_ver}
%global upstream_ver 7.2.3
%endif

# Bumped whenever the patch tarball changes without the upstream version moving.
%if %{undefined patchset_ver}
%global patchset_ver 1
%endif

# rpm gives - to the version-release separator, so it cannot appear in Version
# itself. A release candidate's own Makefile reports the version it leads up to
# anyway -- 7.3-rc1 builds 7.3.0 -- and %%prep drops the EXTRAVERSION that would
# otherwise carry the -rcN into uname -r. A stable version passes through.
%global kversion %(echo %{upstream_ver} | sed -e 's/-rc[0-9]*$/.0/')

# The kernel's own release string: what uname -r reports and what names
# /usr/lib/modules/<...>. Matches Fedora's <version>-<release>.<arch> convention.
%global kverrel %{version}-%{release}.%{_target_cpu}

# No -debuginfo: modules are stripped at install time via INSTALL_MOD_STRIP.
%global debug_package %{nil}
%global _missing_build_ids_terminate_build 0

# rpm's kernel module file attribute would decorate every .ko with
# kernel(<symbol>) provides and requires, which only Fedora's own split kernel
# packaging can satisfy. Keep the module tree out of the dependency generator
# entirely; the dependencies this package really has are declared by hand below.
%global __provides_exclude_from ^/usr/lib/(modules|surface-dtb)/.*$
%global __requires_exclude_from ^/usr/lib/(modules|surface-dtb)/.*$

Name:           kernel-surface
Version:        %{kversion}
Release:        %{patchset_ver}%{?dist}
Summary:        Linux kernel for the Microsoft Surface Pro 12-inch (Snapdragon X1P-42-100)
License:        GPL-2.0-only
URL:            https://github.com/miasvanklei/Gentoo-overlay

ExclusiveArch:  aarch64

Source0:        https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/snapshot/linux-%{upstream_ver}.tar.gz
Source1:        kernel-surface-patches-%{upstream_ver}-%{patchset_ver}.tar.gz
Source2:        base-aarch64.config
Source3:        surface.config
Source4:        live-image.config
Source5:        no-debug-info.config

BuildRequires:  bc
BuildRequires:  binutils
BuildRequires:  bison
BuildRequires:  bzip2
BuildRequires:  diffutils
BuildRequires:  elfutils-devel
BuildRequires:  elfutils-libelf-devel
BuildRequires:  findutils
BuildRequires:  flex
BuildRequires:  gcc
BuildRequires:  gzip
BuildRequires:  hostname
BuildRequires:  kmod
BuildRequires:  make
BuildRequires:  openssl-devel
BuildRequires:  patch
BuildRequires:  perl-interpreter
BuildRequires:  python3
BuildRequires:  rsync
BuildRequires:  tar
BuildRequires:  xz
BuildRequires:  zstd

Requires:       dracut
Requires:       kmod
Requires:       linux-firmware
Requires:       systemd >= 254

# This package stands in for the whole of Fedora's split kernel packaging, so
# anything with a plain `Requires: kernel-core` (anaconda, dracut config,
# desktop groups) resolves against it. It deliberately does not Obsolete the
# Fedora packages: the KIWI description picks this one by name and <ignore>s
# the Fedora ones, which keeps the repo safe to enable on a normal system.
Provides:       kernel = %{version}-%{release}
Provides:       kernel-core = %{version}-%{release}
Provides:       kernel-modules = %{version}-%{release}
Provides:       kernel-modules-core = %{version}-%{release}
Provides:       kernel-modules-extra = %{version}-%{release}
Provides:       kernel-uname-r = %{kverrel}
Provides:       kernel-core-uname-r = %{kverrel}
Provides:       kernel-modules-uname-r = %{kverrel}
Provides:       kernel-modules-core-uname-r = %{kverrel}
Provides:       kernel-modules-extra-uname-r = %{kverrel}
Provides:       installonlypkg(kernel)

# Fedora's kernel-uki-dtbloader carries ~3000 boards' device trees and conflicts
# with a plain kernel image package; this board is not in its database anyway.
Conflicts:      kernel-uki-dtbloader

%description
The Linux kernel built from vanilla upstream sources with the Microsoft Surface
Pro 12-inch (Snapdragon X1P-42-100) patch set from the miasvanklei Gentoo
overlay applied.

Beyond the device tree for the board, the patch set adds a Surface Aggregator
Module RTC driver, a suspend workaround for the aggregator controller, CAMSS
and CSI-2 D-PHY support for the tablet's cameras, remoteproc attach support for
the already-running DSPs, and assorted clock, PCI and interrupt controller
fixes for the platform.

This package provides kernel, kernel-core, kernel-modules and
kernel-modules-extra, so it can be installed in place of Fedora's kernel
packages.

%prep
%setup -q -n linux-%{upstream_ver} -a 1

# Apply every patch directory in the order given by patch-order.txt, which
# make-sources.sh encoded into the tarball's directory names.
#
# The patch flags are Portage's eapply flags (patch -p1 -f -g0
# --no-backup-if-mismatch), which is what the overlay's patches are maintained
# against: they carry stale context lines from before upstream refactors and
# only apply at GNU patch's default fuzz of 2. Forcing --fuzz=0 here rejects
# roughly a fifth of the set. What guards against a silently mis-applied patch
# is not the fuzz level but the .config and kernelrelease assertions below.
for patchdir in patches/*/; do
    for patchfile in "${patchdir}"*.patch; do
        [ -e "${patchfile}" ] || continue
        echo "Applying ${patchfile}"
        patch -p1 -f -g0 --no-backup-if-mismatch -i "${patchfile}"
    done
done
rm -rf patches

# Fold the -rcN suffix into the package release instead of carrying it in
# uname -r, so the module directory is named the way Fedora names it.
sed -i 's/^EXTRAVERSION[[:space:]]*=.*/EXTRAVERSION =/' Makefile

cp -f %{SOURCE2} .config

# The base config still carries Fedora's own build salt, which feeds the
# kernel's build ID; reset it so this kernel does not share one with the
# Fedora build it was seeded from.
cat > .release.config <<EOF
CONFIG_LOCALVERSION="-%{release}.%{_target_cpu}"
CONFIG_BUILD_SALT="%{kverrel}"
EOF

ARCH=arm64 scripts/kconfig/merge_config.sh -m -O . \
    .config .release.config %{SOURCE3} %{SOURCE4} %{SOURCE5}
make ARCH=arm64 olddefconfig

# merge_config.sh is only advisory about symbols it could not set, so check the
# ones that exist solely because the patch set applied.
for sym in CONFIG_RTC_DRV_SURFACE CONFIG_PHY_QCOM_MIPI_CSI2; do
    grep -q "^${sym}=" .config || {
        echo "ERROR: ${sym} missing from .config; the patch set did not apply"
        exit 1
    }
done

# The build derives /usr/lib/modules/<...> from CONFIG_LOCALVERSION. A mismatch
# here means it would not be the directory %%files and the scriptlets name,
# which otherwise only shows up as a broken package.
kernelrelease=$(make -s ARCH=arm64 kernelrelease | tail -n1)
test "${kernelrelease}" = "%{kverrel}" || {
    echo "ERROR: kernelrelease is ${kernelrelease}, expected %{kverrel}"
    exit 1
}

%build
%make_build ARCH=arm64 Image modules dtbs

%install
%make_build ARCH=arm64 \
    INSTALL_MOD_PATH=%{buildroot}/usr INSTALL_MOD_STRIP=1 \
    modules_install

%make_build ARCH=arm64 \
    INSTALL_DTBS_PATH=%{buildroot}/usr/lib/modules/%{kverrel}/dtb \
    dtbs_install

# modules_install leaves symlinks into the build tree, which does not exist on
# the installed system.
rm -f %{buildroot}/usr/lib/modules/%{kverrel}/build
rm -f %{buildroot}/usr/lib/modules/%{kverrel}/source

# GRUB loads the aarch64 kernel as an EFI application, so this is the
# uncompressed Image, not Image.gz. kernel-install copies it into /boot.
install -Dm644 arch/arm64/boot/Image \
    %{buildroot}/usr/lib/modules/%{kverrel}/vmlinuz
install -Dm644 System.map \
    %{buildroot}/usr/lib/modules/%{kverrel}/System.map
install -Dm644 .config \
    %{buildroot}/usr/lib/modules/%{kverrel}/config
install -Dm644 arch/arm64/boot/dts/qcom/x1p42100-microsoft-sp12in.dtb \
    %{buildroot}/usr/lib/surface-dtb/x1p42100-microsoft-sp12in.dtb

%post
/usr/sbin/depmod -a %{kverrel} || :

%posttrans
# Same as Fedora's kernel-core: hand the kernel to kernel-install, which
# generates the initramfs, copies vmlinuz into /boot and writes the BLS loader
# entry.
if [ -x /usr/bin/kernel-install ]; then
    /usr/bin/kernel-install add %{kverrel} \
        /usr/lib/modules/%{kverrel}/vmlinuz || :
fi

%preun
if [ -x /usr/bin/kernel-install ]; then
    /usr/bin/kernel-install remove %{kverrel} || :
fi

%files
%license COPYING
/usr/lib/modules/%{kverrel}/
/usr/lib/surface-dtb/x1p42100-microsoft-sp12in.dtb
%ghost %attr(0644,root,root) /boot/config-%{kverrel}
%ghost %attr(0644,root,root) /boot/initramfs-%{kverrel}.img
%ghost %attr(0600,root,root) /boot/System.map-%{kverrel}
%ghost %attr(0644,root,root) /boot/vmlinuz-%{kverrel}

%changelog
* Sun Sep 06 2026 Saya Andy  7.2.3-1
- Initial package: vanilla 7.2.3 with the overlay's Surface Pro 12" patch set