add mpv-fourier scaffold (delivery vehicle for dmabuf-modifier-triage iter1)

mpv on ohm is currently stock arch from [extra]. To ship the
vo_dmabuf_wayland plane-semantics fix per
marfrit/dmabuf-modifier-triage#1, we need an mpv-fourier package
following the same fourier-umbrella pattern as kwin-fourier,
qt6-base-fourier, firefox-fourier, libva-v4l2-request-fourier.

This commit lays down:

- arch/mpv-fourier/PKGBUILD pinning upstream mpv 0.41.0 tarball, with
  empty patch slot in prepare(). replaces=mpv. provides=mpv,libmpv.so.
  When iter1 produces the patch, add it to source=()/sha256sums=()
  and uncomment the patch -p1 line.
- arch/mpv-fourier/README.md documenting why + tracker links
- .gitea/workflows/build.yml job mpv-fourier-aarch64 chained after
  libva-v4l2-request-fourier-aarch64 for marfrit.db serialization.
  Same fermi LXC runner, same makepkg → sign → repo-add → rsync flow.

Initial scaffold builds vanilla mpv 0.41.0 with no fourier patches —
once iter1 lands, bump pkgrel and add the patch.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -592,6 +592,116 @@ jobs:
         if: always()
         run: rm -f /root/repo_pass /root/.ssh/id_ed25519
 
+  # -------------------------------------------------------------------------
+  # mpv-fourier (aarch64 only) — mpv with fourier-umbrella patches.
+  # Patch slot exists for the vo_dmabuf_wayland plane-semantics fix per
+  # marfrit/dmabuf-modifier-triage#1. Initial scaffold builds vanilla
+  # mpv 0.41.0 — bump pkgrel and add patch to source=() when iter1 lands.
+  # -------------------------------------------------------------------------
+  mpv-fourier-aarch64:
+    needs: libva-v4l2-request-fourier-aarch64
+    runs-on: arch-aarch64
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: bootstrap runner (idempotent)
+        run: |
+          set -e
+          retry() { for i in 1 2 3; do "$@" && return 0; rc=$?; echo "retry $i (exit=$rc)" >&2; sleep $((i*5)); done; return 1; }
+          retry pacman -Syu --noconfirm --needed base-devel git rsync gnupg openssh sudo
+
+      - name: import signing key
+        env:
+          PRIV: ${{ secrets.MARFRIT_REPO_PRIVATE_KEY }}
+          PASS: ${{ secrets.MARFRIT_REPO_PASSPHRASE }}
+        run: |
+          set -e
+          rm -rf /root/.gnupg /root/repo_pass
+          mkdir -m700 -p /root/.gnupg
+          printf '%s' "$PASS" > /root/repo_pass
+          chmod 600 /root/repo_pass
+          printf '%s\n' "$PRIV" | gpg --batch --import
+          echo "92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C:6:" | gpg --import-ownertrust
+
+      - name: install deploy ssh key
+        env:
+          KEY: ${{ secrets.MARFRIT_REPO_DEPLOY_KEY }}
+        run: |
+          mkdir -m700 -p /root/.ssh
+          printf '%s\n' "$KEY" > /root/.ssh/id_ed25519
+          chmod 600 /root/.ssh/id_ed25519
+          ssh-keyscan -t ed25519 nc.reauktion.de > /root/.ssh/known_hosts 2>/dev/null
+
+      - name: makepkg mpv-fourier
+        run: |
+          set -e
+          rm -rf /tmp/build-mpv
+          cp -r arch/mpv-fourier /tmp/build-mpv
+          chown -R builder:builder /tmp/build-mpv
+          cd /tmp/build-mpv
+          sudo -u builder -H env MAKEFLAGS="-j$(nproc)" \
+            makepkg --nocheck --noconfirm --syncdeps --cleanbuild
+          ls -la *.pkg.tar.* | grep -v "\.sig$"
+
+      - name: sign mpv-fourier
+        run: |
+          set -e
+          cd /tmp/build-mpv
+          for f in *.pkg.tar.xz *.pkg.tar.zst *.pkg.tar.gz; do
+            [ -f "$f" ] || continue
+            gpg --batch --pinentry-mode loopback --passphrase-file /root/repo_pass \
+                --detach-sign --yes -u 92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C "$f"
+          done
+
+      - name: update aarch64 repo db
+        run: |
+          set -e
+          mkdir -p /tmp/arch-stage-mpv
+          cd /tmp/arch-stage-mpv
+          rm -f *
+          for f in marfrit.db.tar.gz marfrit.db.tar.gz.sig marfrit.files.tar.gz marfrit.files.tar.gz.sig; do
+            curl -sSLf "https://packages.reauktion.de/arch/aarch64/$f" -o "$f" || rm -f "$f"
+          done
+          for ext in xz zst gz; do
+            ls /tmp/build-mpv/*.pkg.tar.$ext 2>/dev/null && \
+              mv /tmp/build-mpv/*.pkg.tar.$ext /tmp/build-mpv/*.pkg.tar.$ext.sig .
+          done || true
+          export GNUPGHOME=/root/.gnupg
+          printf 'pinentry-mode loopback\npassphrase-file /root/repo_pass\n' > /root/.gnupg/gpg.conf
+          printf 'allow-loopback-pinentry\n' > /root/.gnupg/gpg-agent.conf
+          gpg-connect-agent reloadagent /bye
+          pkgs=()
+          for ext in xz zst gz; do
+            for f in *.pkg.tar.$ext; do [ -f "$f" ] && pkgs+=("$f"); done
+          done
+          if [ -f marfrit.db.tar.gz ]; then
+            for f in "${pkgs[@]}"; do
+              name=$(echo "$f" | sed -E 's/-[0-9].*//')
+              repo-remove --sign --key 92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C \
+                marfrit.db.tar.gz "$name" 2>/dev/null || true
+            done
+          fi
+          repo-add --new --sign --key 92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C \
+            --verify marfrit.db.tar.gz "${pkgs[@]}"
+          ln -sf marfrit.db.tar.gz        marfrit.db
+          ln -sf marfrit.files.tar.gz     marfrit.files
+          ln -sf marfrit.db.tar.gz.sig    marfrit.db.sig
+          rm -f marfrit.files.sig
+
+      - name: publish to aarch64
+        run: |
+          set -e
+          retry() { for i in 1 2 3; do "$@" && return 0; rc=$?; echo "retry $i (exit=$rc)" >&2; sleep $((i*5)); done; return 1; }
+          cd /tmp/arch-stage-mpv
+          retry rsync -avL --copy-unsafe-links \
+            -e 'ssh -i /root/.ssh/id_ed25519' \
+            ./ mfritsche@nc.reauktion.de:arch/aarch64/
+
+      - name: wipe secrets
+        if: always()
+        run: rm -f /root/repo_pass /root/.ssh/id_ed25519
+
   # -------------------------------------------------------------------------
   # claude-his-agent Debian (Architecture: all) — same dpkg-deb pattern as
   # lmcp-debian; publishes to bookworm + trixie via hertz reprepro.

arch/mpv-fourier/PKGBUILD

@@ -0,0 +1,134 @@
+# Maintainer: Markus Fritsche <fritsche.markus@gmail.com>
+#
+# mpv-fourier — mpv with the fourier-umbrella patches. The first patch
+# slot exists for the vo_dmabuf_wayland plane-semantics fix per
+# marfrit/dmabuf-modifier-triage#1: mpv currently constructs the
+# zwp_linux_buffer_params_v1 wl_protocol message with internally
+# inconsistent plane semantics on V4L2 stateless decoder dmabufs (per-
+# plane fds combined with single-allocation offset for plane 1), causing
+# KWin to read the UV chroma plane past-EOF and render solid dark green
+# on ohm (RK3566 + hantro G1 + Mali-G52). The patch is not yet written —
+# this scaffold prepares the shipping path for when iter1 lands.
+#
+# Campaign: ~/src/dmabuf-modifier-triage/ (Phase 0 closed 2026-05-08)
+# Upstream: https://github.com/mpv-player/mpv
+# Build target: fermi LXC actrunner-aarch64-hertz via marfrit-packages
+# Gitea Actions; alternative: boltzmann via his subagent + marfrit-publish.
+
+pkgname=mpv-fourier
+_upstreampkg=mpv
+pkgver=0.41.0
+pkgrel=1
+pkgdesc='mpv with fourier-umbrella patches (vo_dmabuf_wayland plane-semantics fix slot)'
+arch=('aarch64')
+url='https://mpv.io/'
+license=('GPL-2.0-or-later' 'LGPL-2.1-or-later')
+depends=(
+    alsa-lib
+    desktop-file-utils
+    ffmpeg
+    glibc
+    hicolor-icon-theme
+    jack
+    lcms2
+    libarchive
+    libass
+    libbluray
+    libcdio
+    libcdio-paranoia
+    libdisplay-info
+    libdrm
+    libdvdnav
+    libdvdread
+    libegl
+    libgl
+    libglvnd
+    libjpeg-turbo
+    libplacebo
+    libpulse
+    libsixel
+    libva
+    libvdpau
+    libx11
+    libxext
+    libxkbcommon
+    libxpresent
+    libxrandr
+    libxss
+    libxv
+    luajit
+    mesa
+    mujs
+    libpipewire
+    rubberband
+    sdl2
+    openal
+    uchardet
+    vapoursynth
+    vulkan-icd-loader
+    wayland
+    zlib
+)
+makedepends=(
+    git
+    meson
+    ninja
+    pkgconf
+    python-docutils
+    wayland-protocols
+)
+optdepends=(
+    'yt-dlp: for video-sharing websites playback'
+)
+provides=("${_upstreampkg}=${pkgver}" 'libmpv.so')
+conflicts=("${_upstreampkg}")
+replaces=("${_upstreampkg}")
+
+source=(
+    "${_upstreampkg}-${pkgver}.tar.gz::https://github.com/mpv-player/${_upstreampkg}/archive/v${pkgver}/${_upstreampkg}-${pkgver}.tar.gz"
+)
+sha256sums=(
+    'ee21092a5ee427353392360929dc64645c54479aefdb5babc5cfbb5fad626209'
+)
+
+prepare() {
+    cd "${_upstreampkg}-${pkgver}"
+
+    # Patch slot — iter1 of dmabuf-modifier-triage will produce the actual
+    # vo_dmabuf_wayland.c plane-semantics fix and add it as 0001-... here.
+    # Once the libva path is also unblocked (by libva-multiplanar iter9)
+    # and the WAYLAND_DEBUG verifier confirms whether the bug is purely in
+    # mpv's VO or also in libva/ffmpeg producer code, the exact patch
+    # shape is determined.
+    #
+    # When the patch lands, add it to source=() above + sha256sums=() and
+    # uncomment the patch -p1 below.
+    #
+    # patch -p1 < "${srcdir}/0001-vo_dmabuf_wayland-plane-semantics.patch"
+    :
+}
+
+build() {
+    cd "${_upstreampkg}-${pkgver}"
+    arch-meson build \
+        --buildtype=release \
+        -Dlibmpv=true \
+        -Dmanpage-build=enabled \
+        -Dcdda=enabled \
+        -Ddvbin=enabled \
+        -Ddvdnav=enabled \
+        -Dlibarchive=enabled \
+        -Dopenal=enabled \
+        -Dsdl2-audio=enabled \
+        -Dsdl2-video=enabled \
+        -Dsdl2-gamepad=enabled
+    meson compile -C build
+}
+
+package() {
+    cd "${_upstreampkg}-${pkgver}"
+    meson install -C build --destdir "${pkgdir}"
+
+    install -Dm644 LICENSE.GPL  "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE.GPL"
+    install -Dm644 LICENSE.LGPL "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE.LGPL"
+}

arch/mpv-fourier/README.md

@@ -0,0 +1,40 @@
+# mpv-fourier
+
+mpv with the fourier-umbrella patches.
+
+## Why
+
+The dmabuf-modifier-triage campaign isolated the green-frames bug on ohm
+to mpv's `vo_dmabuf_wayland.c` plane-semantics handling for V4L2 stateless
+decoder dmabufs. mpv currently emits a `zwp_linux_buffer_params_v1`
+message that mixes per-plane fds (V4L2 MPLANE export) with a single-
+allocation offset for plane 1, causing KWin to read the UV chroma plane
+past-EOF on the UV-plane fd and render solid dark green.
+
+This package is the delivery vehicle for the fix once it's written.
+PKGBUILD is in place with an empty patch slot; the patch itself is iter1
+of the triage campaign.
+
+## Tracker
+
+- Bug: [marfrit/dmabuf-modifier-triage#1](https://git.reauktion.de/marfrit/dmabuf-modifier-triage/issues/1)
+- Symptom-tracker: [marfrit/libva-multiplanar#1](https://git.reauktion.de/marfrit/libva-multiplanar/issues/1)
+- Acceptance criterion: `~/src/dmabuf-modifier-triage/screenshots/`
+
+## Status
+
+- 2026-05-08: scaffold landed. Builds vanilla mpv 0.41.0 with no
+  fourier patches applied (patch slot empty in `prepare()`). pkgrel=1
+  pinned to mpv release v0.41.0.
+
+When iter1 of the triage campaign produces the patch, bump pkgrel,
+add the patch to `source=()` and `sha256sums=()`, uncomment the
+`patch -p1` line in `prepare()`.
+
+## Hosts that benefit
+
+Only hosts that exercise the V4L2 stateless dmabuf-wayland path —
+ohm (RK3566 + hantro G1) today, fresnel (RK3399 + hantro + rkvdec)
+once that campaign reaches its mpv-test phase. Other hosts on
+[marfrit] (boltzmann, hertz desktop) won't see any difference as
+the fix is no-op for non-V4L2-stateless dmabuf paths.