marfrit
13a7566c34
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Three patches landed on ohm in sequence today: qt6-base-fourier (GL_ALPHA → GL_R8 on ES 3.x, 3 sites in qtbase), kwin-fourier (watchDmaBuf no-op test fixture), chromium-fourier patch 4/4 (V4L2 capture pool floor at 16). Each unsticks one layer. Together they produce smooth 1080p30 H.264 playback under KDE Plasma 6.6.4 Wayland on RK3566 PineTab2 mainline, where stock chromium previously stalled in 3 seconds. Combined chrome CPU ~81% steady, KWin ~9%, zero GL_INVALID_VALUE during playback. Brave's YouTube on the same compositor session also feels snappier independently — the kwin-fourier watchDmaBuf bypass is a general-purpose latency reduction for every wp_linux_dmabuf client on Mali-class hardware, not chrome-specific. The kernel-side architectural hole is the right upstream-correct fix: vb2 / hantro / rga don't populate dma_resv exclusive fences for V4L2 producers, so dma_buf_export_sync_file substitutes a stub fence representing nothing real. Per-driver fence wiring (3 small commits: vb2 helper API, hantro opt-in, rga opt-in) plus a parallel KWin commit using poll(POLLIN) directly on the dmabuf fd is the planned MR pair. kwin-fourier as it stands is a working diagnostic, not the upstream-bound shape.
111 lines
3.1 KiB
Bash
111 lines
3.1 KiB
Bash
# Maintainer: Markus Fritsche <mfritsche@reauktion.de>
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#
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# vulkan-panfrost — Mesa's panvk Vulkan driver, packaged as a
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# standalone ICD on Arch Linux ARM. Stock ALARM `mesa` does not build
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# with -Dvulkan-drivers=panfrost, so panvk doesn't ship.
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#
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# Targets both Mali kernel drivers:
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# - panfrost (Bifrost: Mali-G31 / G52 / G57) on RK3566 / RK3568 etc.
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# - panthor (Valhall: Mali-G610+) on RK3588 / RK3588S etc.
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#
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# panvk on Mali-G52 r1 (Bifrost-gen2) currently returns
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# VK_ERROR_INCOMPATIBLE_DRIVER on probe — that's an upstream mesa
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# issue, not a packaging one. The driver lights up cleanly on
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# Mali-G610 Valhall (RK3588) which is the immediate target. Install on
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# Bifrost boards anyway; future mesa releases may unblock G52 r1
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# without re-packaging.
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pkgname=vulkan-panfrost
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pkgver=26.0.5
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pkgrel=1
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epoch=1
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pkgdesc='Mesa Vulkan ICD for Mali Bifrost / Valhall (panvk)'
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arch=('aarch64')
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url='https://gitlab.freedesktop.org/mesa/mesa'
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license=('MIT')
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depends=(
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vulkan-icd-loader
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libdrm
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zlib
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zstd
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expat
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libelf
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wayland
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)
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makedepends=(
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meson
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ninja
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python-mako
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glslang
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libxrandr
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libxshmfence
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libxxf86vm
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vulkan-headers
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wayland-protocols
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rust-bindgen
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rust
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llvm
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llvm-libs
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libclc
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spirv-tools
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spirv-llvm-translator
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)
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provides=('vulkan-driver')
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options=('!lto')
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source=("https://archive.mesa3d.org/mesa-${pkgver}.tar.xz")
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sha256sums=('SKIP')
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build() {
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cd "${srcdir}/mesa-${pkgver}"
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# Strip mesa down to just the panvk Vulkan driver — no Gallium
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# drivers, no GL/GLES, no GLX, no EGL, no VAAPI/VDPAU. The host's
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# stock `mesa` package keeps providing all of those; this PKGBUILD
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# only adds the missing Vulkan ICD next to it.
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#
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# --auto-features=disabled means features have to be opt-in. Avoids
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# mesa's default "enable everything we can find headers for" pulling
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# in xlib-lease / gallium-va / etc. that we don't want here.
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meson setup . build \
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--prefix=/usr \
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--libexecdir=lib \
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--sbindir=bin \
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--buildtype=release \
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--auto-features=disabled \
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--wrap-mode=nodownload \
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-Db_lto=false \
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-Db_pie=true \
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-Dvulkan-drivers=panfrost \
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-Dgallium-drivers= \
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-Dplatforms=wayland \
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-Dshared-glapi=disabled \
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-Dgallium-rusticl=false \
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-Dmicrosoft-clc=disabled \
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-Dvideo-codecs= \
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-Dllvm=enabled \
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-Dshared-llvm=enabled \
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-Dspirv-tools=enabled \
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-Dvulkan-icd-dir=/usr/share/vulkan/icd.d
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meson compile -C build
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}
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package() {
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cd "${srcdir}/mesa-${pkgver}"
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# Mesa's install rules drop a lot of files we don't want in this
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# narrow package — stage to a temp dir, then cherry-pick.
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DESTDIR="${srcdir}/staging" meson install -C build --no-rebuild
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# The ICD shared object
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install -Dm755 "${srcdir}/staging/usr/lib/libvulkan_panfrost.so" \
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"${pkgdir}/usr/lib/libvulkan_panfrost.so"
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# The Vulkan loader manifest. Mesa installs it as
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# `panfrost_icd.<arch>.json` (the userspace driver name) — that
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# filename is what the Vulkan loader expects, no need to rename.
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install -dm755 "${pkgdir}/usr/share/vulkan/icd.d"
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cp -av "${srcdir}/staging/usr/share/vulkan/icd.d/"panfrost_icd*.json \
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"${pkgdir}/usr/share/vulkan/icd.d/"
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}
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