chromium-fourier r2 + firefox-fourier 150.0.1 + KWIN_PIVOT.md

chromium-fourier:
- patch 3/3 nv12-external-oes-on-modifier-external-only.patch — adds
  NativePixmapEGLBinding::ModifierRequiresExternalOES helper, extends
  OzoneImageGLTexturesHolder::GetBinding to honor EGL external_only
  flag for NV12 dmabufs on panfrost / panthor. Validated on ohm
  (RK3566 hantro mainline 6.19.10): bbb_1080p30_h264.mp4 plays at
  34.7 % combined CPU vs ~131 % pre-patch baseline (~3.8x).
- PKGBUILD pkgrel 1->2, source array + sha256sums + prepare() hook for
  patch 4, patch numbering 1/2,2/2 -> 1/3,2/3,3/3.
- NEXT.md appended with 2026-04-28 section: patch 4 design, validation
  log, KWin GL_ALPHA bug pinpoint (preexisting since 2026-03-06,
  affects every wayland video client; unrelated to chromium-fourier),
  device-renumbering note (/dev/video1 = encoder post-reboot).
- KWIN_PIVOT.md: 4-phase plan to identify and patch KWin's
  glTexImage2D(internalFormat=GL_ALPHA) site, ohm-only test plan,
  scope discipline.
- patches/ now tracked (compiler-rt-adjust-paths, enable-v4l2,
  wayland-allow-direct-egl-gles2, nv12-external-oes); the dead-end
  chromeos-pipeline-bypass.patch removed.

firefox-fourier:
- 4 patches (gfxinfo v4l2 stateless fourccs, libwrapper hwdevice ctx,
  ffmpegvideo v4l2-request route, prefs v4l2-request default).
- PKGBUILD bumped to firefox 150.0.1, Arch toolchain glue patches
  layered in, mozconfig with --without-wasm-sandboxed-libraries for
  ALARM, package() launcher fix (rm -f symlink before cat > to avoid
  ENOENT through the dangling /usr/local symlink mach install drops).
- 150.0.1-1-aarch64.pkg.tar.zst built on boltzmann (95 MB), pending
  fresnel power-on for V4L2 stateless validation on RK3399.

arch/firefox-fourier/PKGBUILD

@@ -0,0 +1,163 @@
+# Maintainer: Markus Fritsche <mfritsche@reauktion.de>
+#
+# Firefox with V4L2 stateless (request API) hardware video decode
+# unlocked for mainline-Linux Rockchip (RK3399 rkvdec, RK3566/RK3588
+# hantro multiplanar, RK3588 rkvdec2). Sibling to chromium-fourier;
+# same niche. No vendor MPP, no Mali blob, no panfork, no 5.10 BSP.
+#
+# Patch series adds 4 thin shims around upstream firefox (~+169 lines,
+# zero deletions). Architecture: stateless decode rides libavcodec's
+# v4l2_request hwaccel (AV_HWDEVICE_TYPE_DRM); no separate Mozilla V4L2
+# decoder gets written. See ../../arch/firefox-fourier/PLAN.md for
+# the full diagnosis. Mozilla bug 1969297.
+
+pkgname=firefox-fourier
+pkgver=150.0.1
+pkgrel=1
+pkgdesc='Firefox with V4L2 stateless HW video decode unlocked for mainline Linux Rockchip'
+arch=('aarch64' 'x86_64')
+url='https://www.mozilla.org/firefox'
+license=('MPL-2.0')
+depends=(
+  alsa-lib
+  at-spi2-core
+  cairo
+  dbus
+  ffmpeg
+  fontconfig
+  freetype2
+  gcc-libs
+  gdk-pixbuf2
+  glib2
+  glibc
+  gtk3
+  hicolor-icon-theme
+  libdrm
+  libpulse
+  libva
+  libxcb
+  libxkbcommon
+  mesa
+  nspr
+  nss
+  pango
+  pciutils
+  ttf-liberation
+  v4l-utils
+)
+makedepends=(
+  cbindgen
+  clang
+  imagemagick
+  inetutils
+  lld
+  llvm
+  mesa
+  nasm
+  nodejs
+  python
+  rust
+  unzip
+  wasi-compiler-rt
+  wasi-libc
+  yasm
+  zip
+)
+optdepends=(
+  'hunspell-en_us: spell checking, American English'
+  'libnotify: send notifications when downloads complete'
+  'pulseaudio: audio support'
+)
+provides=(firefox)
+conflicts=(firefox)
+options=('!emptydirs' '!strip')
+source=(
+  "https://archive.mozilla.org/pub/firefox/releases/${pkgver}/source/firefox-${pkgver}.source.tar.xz"
+  'mozconfig'
+  # Arch's official firefox patches — toolchain glue for clang 22 +
+  # glibc 2.43 + Rust 1.95+. Picked up verbatim because we hit the same
+  # walls. arch-0001 (install-under-remoting) skipped — our launcher
+  # ships under /usr/bin/firefox-fourier with our own wrapper.
+  # https://gitlab.archlinux.org/archlinux/packaging/packages/firefox
+  'arch-0002-Bug-2033279-Make-enable-rust-simd-work-with-Rust-1.9.patch'
+  'arch-0003-Patch-glsl-optimizer-to-build-with-glibc-2.43.patch'
+  'arch-0004-Bug-2023597-Use-wasm32-wasip1-target-for-clang-22.1-.patch'
+  # firefox-fourier patches — V4L2 stateless decode unlock.
+  '0001-gfxinfo-v4l2-stateless-fourccs.patch'
+  '0002-libwrapper-hwdevice-ctx-create.patch'
+  '0003-ffmpegvideo-v4l2-request-route.patch'
+  '0004-prefs-v4l2-request.patch'
+)
+sha256sums=('SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP')
+
+prepare() {
+  cd "${srcdir}/firefox-${pkgver}"
+
+  # Toolchain glue (Arch upstream) — apply BEFORE the fourier patches.
+  patch -Np1 -i "${srcdir}/arch-0002-Bug-2033279-Make-enable-rust-simd-work-with-Rust-1.9.patch"
+  patch -Np1 -i "${srcdir}/arch-0003-Patch-glsl-optimizer-to-build-with-glibc-2.43.patch"
+  patch -Np1 -i "${srcdir}/arch-0004-Bug-2023597-Use-wasm32-wasip1-target-for-clang-22.1-.patch"
+
+  # Fourier patches — order matters; see ../PLAN.md for rationale.
+  patch -Np1 -i "${srcdir}/0001-gfxinfo-v4l2-stateless-fourccs.patch"
+  patch -Np1 -i "${srcdir}/0002-libwrapper-hwdevice-ctx-create.patch"
+  patch -Np1 -i "${srcdir}/0003-ffmpegvideo-v4l2-request-route.patch"
+  patch -Np1 -i "${srcdir}/0004-prefs-v4l2-request.patch"
+
+  cp "${srcdir}/mozconfig" .mozconfig
+}
+
+build() {
+  cd "${srcdir}/firefox-${pkgver}"
+
+  # Arch's makepkg.conf injects -fexceptions into CFLAGS/CXXFLAGS by
+  # default for hardening. Mozilla's STL wrappers refuse to compile
+  # with exceptions enabled (#error "STL code can only be used with
+  # -fno-exceptions"). Strip the offender before mach configure picks
+  # up the env. Same trick the upstream Arch firefox PKGBUILD uses.
+  CFLAGS="${CFLAGS//-fexceptions/}"
+  CXXFLAGS="${CXXFLAGS//-fexceptions/}"
+  export CFLAGS CXXFLAGS
+
+  export MOZ_NOSPAM=1
+  export MOZ_API_KEY_UNUSED=1
+  export MOZ_TELEMETRY_REPORTING=
+  export MOZ_REQUIRE_SIGNING=
+  export MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE=system
+  export PYTHON=/usr/bin/python
+
+  ./mach configure
+  ./mach build
+}
+
+package() {
+  cd "${srcdir}/firefox-${pkgver}"
+
+  DESTDIR="${pkgdir}" ./mach install
+
+  # Move mach's default /usr/local/* layout to /usr/* so we conflict
+  # with `firefox` cleanly and `provides=firefox` actually works.
+  # `cp -r` preserves the bin symlink (target lives in /usr/local) —
+  # delete it before staging the launcher so `cat >` doesn't follow a
+  # dangling symlink and ENOENT.
+  if [ -d "${pkgdir}/usr/local" ]; then
+    cp -r "${pkgdir}/usr/local/." "${pkgdir}/usr/"
+    rm -rf "${pkgdir}/usr/local"
+  fi
+  rm -f "${pkgdir}/usr/bin/firefox-fourier"
+
+  # Launcher script. mach's install drops the binary at
+  # /usr/lib/firefox-fourier/firefox-fourier (a small bash launcher) plus
+  # firefox-fourier-bin alongside; we exec the launcher.
+  cat > "${pkgdir}/usr/bin/firefox-fourier" <<'LAUNCHER'
+#!/bin/bash
+# firefox-fourier launcher — V4L2 stateless HW decode path defaults.
+# Patch 4/4 already defaults media.ffmpeg.v4l2-request.enabled=true on
+# Linux; the env vars below cover the platform-detection bits firefox
+# still consults at startup.
+export MOZ_ENABLE_WAYLAND="${MOZ_ENABLE_WAYLAND:-1}"
+export MOZ_X11_EGL="${MOZ_X11_EGL:-1}"
+exec /usr/lib/firefox-fourier/firefox-fourier "$@"
+LAUNCHER
+  chmod 0755 "${pkgdir}/usr/bin/firefox-fourier"
+}