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claude-noether 154fa2f14a linux-ampere-fourier: bootstrap PKGBUILD (CoolPi GenBook RK3588)

Sibling to kernel-agent PR #8 which lands the scope-tagged board
patches + fleet/ampere.yaml manifest. This PR carries the
makepkg-side recipe.

## Baseline

marfrit/linux-rk3588-marfrit @ f8f3ad9 (mainline v7.0-rc3 + 18 commits):
  10 by Markus Fritsche  (board DTS + Kconfig + suspend/wakeup + bt)
   4 by Shawn Lin        (phy: rockchip-snps-pcie3 stability)
   2 by Cristian Ciocaltea (clk + dw-dp bridge — Collabora)
   1 by Sebastian Reichel (Rock 5 ITX hdmirx — unused by ampere)
   1 by Pedro Alves      (CLK_SET_RATE_PARENT VOP2 fix)

The 6 board-relevant patches (pwm15 pinctrl + RK806 power-off +
genbook pwm-fan/speaker/USB-C/lid) are scope-tagged in
kernel-agent. The 12 others are 'cherry-picks-in-baseline'
currently — splitting them into scope-tagged patches is a
follow-up.

## Source distribution

The kernel tree isn't pushable to Gitea (boltzmann's working clone
is shallow). Tarball (260MB) doesn't belong in marfrit-packages
either. Pragmatic shortcut: ship prebuild.sh that produces the
tarball locally from $LINUX_RK3588_MARFRIT_TREE (default
~/src/linux-rockchip) just before makepkg runs. PKGBUILD source
array references the tarball by name; makepkg picks it up from
the PKGBUILD dir.

Build flow:
  cd arch/linux-ampere-fourier
  ./prebuild.sh           # produces 260MB tarball; idempotent w/ sha check
  makepkg -s --noconfirm

Future iteration: host the tarball on Gitea release assets or
packages.reauktion.de/sources/ and switch source to URL.

## What the PR ships

  PKGBUILD                          — the recipe (linux-rk3588-marfrit @ f8f3ad9)
  config                            — snapshot of ampere's /proc/config.gz
  linux-ampere-fourier.preset       — mkinitcpio preset, /boot/firmware/ paths
  extlinux-add.hook                 — alpm hook, fires on /boot/firmware/Image* changes
  extlinux-add.sh                   — idempotent managed-label injector for
                                     /boot/firmware/extlinux/extlinux.conf
                                     (vfat on mmcblk0p1, ampere-specific path)
  prebuild.sh                       — source-staging helper (see above)
  README.md                         — build + install runbook

## ampere-specific boot path differences vs fresnel

ampere boots from /boot/firmware/ (vfat partition), not /boot/ (root
partition) like fresnel. The PKGBUILD installs Image + initramfs + DTB
under /boot/firmware/ directly. The extlinux-add hook fires on
/boot/firmware/<X> path changes and edits
/boot/firmware/extlinux/extlinux.conf. The mkinitcpio preset writes
initramfs to /boot/firmware/.

Only one PRESET ('default') — no fallback image — because
/boot/firmware is ~1G total and two ~20MB initramfs files plus the
DTB and a couple of kernel-image backups would squeeze it tight.

## Out of scope this PR

- Ask 2 (VP9 enablement) and Ask 3 (AV1 dec) from kernel-agent issue #6
- Build + publish + install (sequenced after this PR + kernel-agent PR #8 merge)
- Splitting the 12 non-board commits into scope-tagged kernel-agent patches

2026-05-15 16:19:24 +00:00

2.6 KiB

Raw Blame History

linux-ampere-fourier

Kernel package for ampere (CoolPi GenBook RK3588). Baselined on marfrit/linux-rk3588-marfrit @ f8f3ad9 (mainline v7.0-rc3 + 18 RK3588-fleet-relevant commits — 10 Markus, 8 upstream cherry-picks).

See marfrit/kernel-agent/fleet/ampere.yaml for the manifest + marfrit/kernel-agent/patches/{soc,module,board}/... for the scope-tagged board patches in the baseline.

Build

The kernel source isn't on Gitea — boltzmann's working clone is shallow (Gitea refuses shallow pushes) and a 260MB tarball doesn't belong in marfrit-packages. Stage the source locally from a clone of the linux-rk3588-marfrit branch:

cd arch/linux-ampere-fourier
./prebuild.sh           # produces linux-rk3588-marfrit-f8f3ad9.tar.gz
makepkg -s --noconfirm  # native aarch64 build; no distcc

prebuild.sh looks at $LINUX_RK3588_MARFRIT_TREE (default ~/src/linux-rockchip) for the kernel working tree. The tip commit must be reachable in that clone — fetch the linux-rk3588-marfrit branch first if you cloned from elsewhere.

Build hosts

Native aarch64 only (per kernel-agent feedback_kernel_agent_no_distcc.md). Either ampere itself (8C/2.4GHz, 32GB, native arch) or boltzmann (Rock 5 ITX+, same uarch). fermi as fallback.

Install

Adds a managed label to /boot/firmware/extlinux/extlinux.conf:

label linux-ampere-fourier
    menu label linux-ampere-fourier (managed)
    kernel /Image-ampere-fourier
    initrd /initramfs-ampere-fourier.img
    fdt    /rk3588-coolpi-cm5-genbook.dtb-ampere-fourier
    append <inherited from arch_mainline>

Default label is NOT changed. After verifying boot of the managed label at the u-boot menu, you flip default manually. Reverting = boot a different label (e.g. arch_mainline, ubuntu_mainline).

Boot path

ampere uses /boot/firmware/ (vfat on mmcblk0p1, ~1G), distinct from fresnel's /boot/ on root partition. The PKGBUILD installs Image, initramfs, and DTB directly under /boot/firmware/. No DTB subdir — single board target.

Open follow-ups (per kernel-agent issue #6)

Ask 2 (VP9 enablement on RK3588 rkvdec) — not addressed in this iteration. Separate session.
Ask 3 (AV1 decoder integration) — backend libva work, not kernel.
Hosting the source tarball publicly so prebuild.sh isn't needed — candidate: Gitea release asset, or packages.reauktion.de/sources/.
Splitting the 12 non-board cherry-pick commits in the baseline (4 Shawn Lin phy, 2 Cristian Ciocaltea, etc.) into scope-tagged patches in kernel-agent — currently they ride along inside the pinned baseline rather than being explicit includes: in the manifest.

2.6 KiB Raw Blame History