# Maintainer: Markus Fritsche <mfritsche@reauktion.de>
#
# linux-ampere-fourier — CoolPi GenBook (RK3588) kernel built from the
# kernel-agent fleet/ampere.yaml manifest applied to mainline v7.0-rc3.
#
# kafr2 baseline (2026-05-18): mainline v7.0-rc3 + the 10 scope-tagged
# kernel-agent patches under patches/{soc,module,board,driver}/:
#   - 1 soc/rk3588 pwm15 pinctrl
#   - 6 board/coolpi-cm5-genbook DTS patches (pwm-fan, RK806 power-off,
#     speaker, USB-C PD, lid switch + USB3 PHY, microphone)
#   - 3 driver/media VP9-on-VDPU381 patches (Sarma's v8 series, imported
#     via marfrit/kernel-agent#12 closure and PR #24)
#
# Drops the prior f8f3ad9 baseline ("18 commits ahead") because that tip
# black-screens ampere — kernel-agent's ka-promote produces this 10-patch
# minimal set from fleet/ampere.yaml. End-to-end VP9 + AV1 (av1-vpu-dec
# is mainline-7.0) decode verified bit-exact via kdirect on the
# hand-built tip 48a8c78 before this package iteration was cut.
#
# Coexists with the user's other extlinux labels in
# /boot/firmware/extlinux/extlinux.conf; never edits them. Adds a
# managed `linux-ampere-fourier` label (the user sets `default` manually
# after verifying boot).
#
# Bootloader path: /boot/firmware/ (vfat on mmcblk0p1). Kernel +
# initramfs + DTB land there directly. Reverting = boot a different
# extlinux label (e.g. arch_mainline, ubuntu_mainline).

pkgbase=linux-ampere-fourier
pkgname=("$pkgbase" "$pkgbase-headers")
pkgver=7.0rc3.kafr2
pkgrel=1
pkgdesc='CoolPi GenBook kernel (v7.0-rc3 + kernel-agent fleet/ampere.yaml — 6 board patches + 3 VP9-VDPU381 + 1 pwm15)'
arch=(aarch64)
url='https://git.reauktion.de/marfrit/kernel-agent'
license=(GPL-2.0-only)
makedepends=(
  bc cpio gettext kmod libelf pahole perl python tar xz
  ccache
  uboot-tools dtc
)
options=('!strip')

# Pinned tip of the kernel-agent-managed source tree for ampere.
# 10 commits ahead of v7.0-rc3, exactly mirroring fleet/ampere.yaml's
# manifest under apply order:
#   - c57d069 soc/rk3588: pwm15 pinctrl entries
#   - 05a915c board/genbook: pwm-fan with thermal cooling
#   - d007b90 module/coolpi-cm5: RK806 system-power-controller
#   - 3722eab board/genbook: speaker via audio-graph-card
#   - 3e42ab6 board/genbook: USB-C PD via FUSB302
#   - 7c241f2 board/genbook: lid switch + USB3 PHY lane
#   - dd545fa board/genbook: wire internal microphone
#   - 9ddcae5 driver/media: rkvdec-vp9 helper rename (Sarma)
#   - c5063d9 driver/media: rkvdec move vp9 to common (Sarma)
#   - 48a8c78 driver/media: rkvdec VP9 for VDPU381 (Sarma)
#
# This is the same tree state ka-promote ampere produces as cumulative.patch
# (see marfrit/kernel-agent build/ampere/v7.0-rc3/manifest.lock for the
# b2sum + per-patch sha256s).
_commit=48a8c785de7f5320513052a64e544c6310d7b273

source=(
  # Local tarball produced by ./prebuild.sh from a local clone of the
  # linux-rk3588-marfrit branch. Not fetched from a URL because the
  # boltzmann working clone is shallow (gitea push rejects) and the
  # 260MB tarball isn't committed to marfrit-packages. Run prebuild.sh
  # before makepkg; see README in this dir.
  "linux-rk3588-marfrit-${_commit:0:7}.tar.gz"
  'config'  # snapshot of running ampere kernel's /proc/config.gz (7.0.0-rc3-ARCH+)
  'linux-ampere-fourier.preset'
  'extlinux-add.hook'
  'extlinux-add.sh'
)
sha256sums=('SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP')

# kernelrelease becomes <Makefile-VERSION>.<PATCH>.<SUBLEVEL><EXTRAVERSION><LOCALVERSION>
# i.e. 7.0.0-rc3-ampere-fourier. Module dir + EXTRAVERSION suffix keep
# this disjoint from the hand-managed /boot/firmware/Image-7.0.0-rc3-ARCH+
# that's currently on the host.
_kernver=7.0.0-rc3-ampere-fourier
_srcdir=linux-rk3588-marfrit

prepare() {
  cd "${_srcdir}"

  echo ":: writing config"
  cp "${srcdir}/config" .config

  # LOCALVERSION suffix to differentiate from upstream-stock builds.
  scripts/config --set-str LOCALVERSION "-ampere-fourier"
  scripts/config -d LOCALVERSION_AUTO

  echo ":: olddefconfig (accept new symbols sensibly)"
  make olddefconfig

  make -s kernelrelease > version
  echo ":: kernel release: $(<version)"
}

build() {
  cd "${_srcdir}"
  unset LDFLAGS
  # Native build only — no distcc per kernel-agent policy
  # (feedback_kernel_agent_no_distcc.md). ccache stays.
  export CC="ccache gcc"
  export HOSTCC="ccache gcc"
  make ${MAKEFLAGS:--j$(nproc)} Image modules dtbs
}

_package() {
  pkgdesc='CoolPi GenBook overclocked kernel (ampere-fourier baseline)'
  depends=(coreutils kmod mkinitcpio uboot-tools)
  optdepends=('linux-firmware: firmware images needed for some devices')
  backup=("etc/mkinitcpio.d/${pkgbase}.preset")

  cd "${_srcdir}"
  local _kver
  _kver=$(<version)

  # Kernel image into the vfat firmware partition (where extlinux looks).
  install -Dm644 arch/arm64/boot/Image \
    "${pkgdir}/boot/firmware/Image-ampere-fourier"

  # Single DTB for the GenBook target — install directly under
  # /boot/firmware/ (no subdir, matches existing host convention).
  install -Dm644 arch/arm64/boot/dts/rockchip/rk3588-coolpi-cm5-genbook.dtb \
    "${pkgdir}/boot/firmware/rk3588-coolpi-cm5-genbook.dtb-ampere-fourier"

  ZSTD_CLEVEL=19 make INSTALL_MOD_PATH="${pkgdir}/usr" \
    INSTALL_MOD_STRIP=1 modules_install
  rm -f "${pkgdir}/usr/lib/modules/${_kver}/"{source,build}

  install -Dm644 "${srcdir}/${pkgbase}.preset" \
    "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"

  install -Dm755 "${srcdir}/extlinux-add.hook" \
    "${pkgdir}/usr/share/libalpm/hooks/95-${pkgbase}-extlinux.hook"
  install -Dm755 "${srcdir}/extlinux-add.sh" \
    "${pkgdir}/usr/share/libalpm/scripts/${pkgbase}-extlinux"
}

_package-headers() {
  pkgdesc='Headers and scripts for the linux-ampere-fourier kernel'
  depends=(pahole)

  cd "${_srcdir}"
  local _kver _builddir
  _kver=$(<version)
  _builddir="${pkgdir}/usr/lib/modules/${_kver}/build"

  install -Dt "${_builddir}" -m644 .config Makefile Module.symvers System.map vmlinux version
  install -Dt "${_builddir}/kernel" -m644 kernel/Makefile

  cp -a scripts "${_builddir}"
  install -Dt "${_builddir}/arch/arm64" -m644 arch/arm64/Makefile
  cp -a arch/arm64/include "${_builddir}/arch/arm64/"
  cp -a include "${_builddir}/"

  find . -name 'Kbuild' -exec install -Dm644 {} "${_builddir}/{}" \;
  find . -name 'Kconfig*' -exec install -Dm644 {} "${_builddir}/{}" \;

  install -d "${pkgdir}/usr/src"
  ln -sr "${_builddir}" "${pkgdir}/usr/src/${pkgbase}"
}

eval "package_${pkgbase}() { _package; }"
eval "package_${pkgbase}-headers() { _package-headers; }"