marfrit
e323aa2316
Adds 0008-panvk-bifrost-bump-max-image-dim-3d-for-dawn.patch. Two-hunk patch:
Hunk 1: Bumps maxImageDimension3D from 512 to 2048 on Bifrost (PAN_ARCH 7..10).
Surfaced by panvk-bifrost-perf-measurement iter1 spike: Brave's WebGPU/Dawn
detects panvk-bifrost as a Vulkan adapter on Mali-G52 r1 MC1 but rejects it
because the advertised limit is below WebGPU's 2048 minimum (per
third_party/dawn/src/dawn/native/vulkan/PhysicalDeviceVk.cpp:746). This is
the actual unblock for the campaign's stated motivator — Chromium GPU
process Vulkan boot on PineTab2 / Bifrost SBCs.
Per Vulkan 1.3 spec §43.1, maxImageDimensionXD is the upper bound on any
creatable image; per-format limits MAY be smaller. On PAN_ARCH<=10 the
per-format limit caps at ~1023 per axis for RGBA8 within the 4 GB
max_img_size_B address constraint. Apps trying 2048^3 with thick formats
hit the per-format limit at image-create — per-spec behavior.
Hunk 2: Removes three asserts in get_max_3d_image_size() that encoded the
wrong invariant (per-format >= basic), opposite of what the Vulkan spec
mandates. The asserts were release-mode-masked via NDEBUG, but debug
builds would abort the first time Dawn (or any client) called
vkGetPhysicalDeviceImageFormatProperties on a 3D image format. Surfaced
by Phase 5 2nd-model review.
Verified on PineTab2 (Mali-G52 r1 MC1, PAN_ARCH 7):
- vulkaninfo: maxImageDimension3D = 2048
- Brave/Dawn: "Insufficient Vulkan limits" warning eliminated; adapter
accepted for WebGPU.
- CTS regression: dEQP-VK.api.copy_and_blit.core.image_to_image.3d_images.*
6/6 Pass (unchanged from r7 baseline).
Phase 5 (2nd-model) review: APPROVE WITH CHANGES — both changes applied
(release-mode + debug-mode assert exposure addressed by removing the
wrong-invariant asserts).
Note on numbering: r8 was attempted (KHR_depth_clamp_zero_one trim) but
abandoned mid-Phase-3 when it surfaced that 5 more post-1.3.10 KHR
extensions are advertised — surgically false-gating all of them would
risk undoing r1's KHR_robustness2 work for Chromium Dawn. Documented at
~/src/panvk-bifrost/iter21/phase0to3_close_no_ship.md.
Cross-refs:
- ~/src/panvk-bifrost/iter22/phase0to2_max3d_close.md (Phase 0-2 close)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
243 lines
11 KiB
Bash
243 lines
11 KiB
Bash
# Maintainer: Markus Fritsche <fritsche.markus@gmail.com>
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#
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# mesa-panvk-bifrost — patched Mesa libvulkan_panfrost.so that exposes
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# Bifrost-gen Mali (Mali-G31/G52/G72/G76, PAN_ARCH 6/7) to Chromium-family
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# browsers' Vulkan compositor.
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#
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# Campaign: ~/src/panvk-bifrost/ — iter9 close (technical milestone
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# 2026-05-20, operator-confirmed Brave window). Goal close requires
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# this package built + published + installable per the
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# feedback_package_done_means_installable.md 3-point check.
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#
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# What it does:
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# - Builds Mesa 26.0.6 (matching ohm's stock mesa pkg) with two
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# patches against src/panfrost/vulkan/panvk_vX_physical_device.c:
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# (1) expose VK_KHR/EXT_robustness2 + nullDescriptor on PAN_ARCH 6/7
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# (2) set has_vk1_1/has_vk1_2 to true on Bifrost
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# - Installs the patched libvulkan_panfrost.so to /usr/lib/panvk-bifrost/
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# (NOT /usr/lib — co-installs alongside stock mesa).
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# - Registers a custom ICD JSON at a non-default path so the system
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# Vulkan loader only picks up our driver when VK_ICD_FILENAMES is set.
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# - Ships /usr/bin/brave-vulkan launcher that wires up env vars + flags.
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#
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# Co-existence: stock /usr/lib/libvulkan_panfrost.so is untouched. Stock
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# /usr/share/vulkan/icd.d/panfrost_icd.json is untouched. Users opt in
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# via brave-vulkan (or by setting VK_ICD_FILENAMES manually).
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#
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# Build target: arch-aarch64 runner via marfrit-packages Gitea Actions.
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# Mesa build is slow (~30-60min on Cortex-A55). Build deps installed
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# inside the runner via pacman -S in the workflow.
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pkgname=mesa-panvk-bifrost
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_mesaver=26.0.6
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pkgver=26.0.6.r9
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pkgrel=1
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pkgdesc="Patched Mesa libvulkan_panfrost.so exposing Bifrost-gen Mali to Vulkan apps (panvk-bifrost campaign)"
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arch=('aarch64')
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url="https://git.reauktion.de/marfrit/panvk-bifrost"
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license=('MIT')
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# We co-install at /usr/lib/panvk-bifrost/ so no conflicts with stock mesa.
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# We DO provide a script that requires brave to be installed.
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depends=(
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'mesa' # for shared mesa runtime libs (libgallium-mesa etc.)
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'libdrm'
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'wayland'
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'libxcb'
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'libx11'
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'libxshmfence'
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'zlib'
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'zstd'
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'libdisplay-info'
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'expat'
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'systemd-libs' # libudev
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'spirv-tools'
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)
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optdepends=(
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'brave-bin: for the brave-vulkan launcher script'
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)
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makedepends=(
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'meson'
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'ninja'
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'pkgconf'
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'bison'
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'flex'
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'python'
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'python-yaml'
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'python-mako'
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'glslang'
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'spirv-tools'
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'llvm'
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'clang'
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'libclc'
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'spirv-llvm-translator'
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'vulkan-headers'
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'wayland-protocols'
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)
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source=(
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"https://archive.mesa3d.org/mesa-${_mesaver}.tar.xz"
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"0001-panvk-expose-robustness2-nullDescriptor-bifrost.patch"
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"0002-panvk-expose-vulkan-1.1-1.2-on-bifrost.patch"
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"0003-panvk-bifrost-vk-ext-transform-feedback.patch"
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"0004-panvk-bifrost-xfb-primitive-decomposition.patch"
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"0005-panvk-bifrost-fragment-stores-atomics.patch"
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"0006-panvk-bifrost-legacy-dithering.patch"
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"0007-panvk-bifrost-xfb-component-base-fix.patch"
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"0008-panvk-bifrost-bump-max-image-dim-3d-for-dawn.patch"
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"brave-vulkan"
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"icd.json"
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)
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sha256sums=(
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'SKIP' # TODO: pin once we know the upstream tarball is stable. archive.mesa3d.org tarballs are stable, so we can hash-pin in iter10.
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'SKIP'
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'SKIP'
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'SKIP'
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'SKIP'
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'SKIP'
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'SKIP'
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'SKIP'
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'SKIP'
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'SKIP'
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'SKIP'
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)
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prepare() {
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cd "mesa-${_mesaver}"
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# iter8 patch: robustness2 + nullDescriptor exposure on Bifrost.
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# Three hunks in panvk_vX_physical_device.c. Apply via sed since
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# the upstream context drifts between Mesa releases and unified-diff
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# patching is brittle (we hit hunk-rejects during manual application).
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sed -i 's|\.KHR_robustness2 = PAN_ARCH >= 10,|.KHR_robustness2 = true,|' src/panfrost/vulkan/panvk_vX_physical_device.c
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sed -i 's|\.EXT_robustness2 = PAN_ARCH >= 10,|.EXT_robustness2 = true,|' src/panfrost/vulkan/panvk_vX_physical_device.c
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sed -i 's|\.nullDescriptor = PAN_ARCH >= 10,|.nullDescriptor = true,|' src/panfrost/vulkan/panvk_vX_physical_device.c
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# iter9 patch: bump api version to 1.1/1.2 for Bifrost. NOTE: this only
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# affects extension exposure flags, NOT the reported apiVersion (which
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# is set by get_api_version() further down and gated separately).
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# The brave-vulkan launcher sets MESA_VK_VERSION_OVERRIDE=1.2 at runtime
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# to deal with the latter — no source change needed for that path.
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sed -i 's|bool has_vk1_1 = PAN_ARCH >= 10;|bool has_vk1_1 = true;|' src/panfrost/vulkan/panvk_vX_physical_device.c
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sed -i 's|bool has_vk1_2 = PAN_ARCH >= 10;|bool has_vk1_2 = true;|' src/panfrost/vulkan/panvk_vX_physical_device.c
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# iter13: VK_EXT_transform_feedback implementation for Bifrost (PAN_ARCH<9).
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# Applied as a real unified-diff patch — the change is too large for sed.
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# Phase-doc context: ~/src/panvk-bifrost/phase{4,5,6}_iter13_close.md.
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# Unlocks ANGLE-Vulkan → GLES3 → WebGL2 / WebGPU on Brave (chrome://gpu
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# reports "Hardware accelerated" across the board for the affected paths).
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patch -p1 < "${srcdir}/0003-panvk-bifrost-vk-ext-transform-feedback.patch"
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# iter17: XFB primitive decomposition for non-LIST topologies (TRI_STRIP,
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# TRI_FAN, LINE_STRIP, *_WITH_ADJACENCY). Replacement panvk-specific
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# NIR pass (panvk_per_arch(nir_lower_xfb)) substituted for upstream
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# pan_nir_lower_xfb. Closes the 162 dEQP-VK winding_* failures from
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# iter15 (958 P / 81 F / 0 Crash on full XFB CTS — remaining 81 fails
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# are by-design resume_* tests, transformFeedbackDraw=false).
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# Phase-doc context: ~/src/panvk-bifrost/iter17/phase{0,1,2,4,5,6,8}_*.md.
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patch -p1 < "${srcdir}/0004-panvk-bifrost-xfb-primitive-decomposition.patch"
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# r5 (2026-05-23): advertise .fragmentStoresAndAtomics = true on Bifrost
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# to satisfy Chromium Dawn's WebGPU init gate
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# (third_party/dawn/src/dawn/native/vulkan/PhysicalDeviceVk.cpp:250).
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# Backports Mesa main's unconditional flip (same line as on main as of
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# 2026-05-06). Disjunction with instance->force_enable_shader_atomics
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# is preserved as a documented kill-switch even though the compiler
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# folds it away. Closes marfrit/panvk-bifrost#2.
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# Verify-before-ship: dEQP-VK.glsl.atomic_operations.* and
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# dEQP-VK.image.store.* show no new Failed vs r4 baseline.
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patch -p1 < "${srcdir}/0005-panvk-bifrost-fragment-stores-atomics.patch"
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# r6 (2026-05-25): advertise VK_EXT_legacy_dithering. Backports Mesa
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# main's unconditional flip. Pure-software composition; vk_render_pass
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# already gates on enabled_features.legacyDithering and panvk_vX_blend
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# + pan_format already plumb the dithered BLEND descriptor (BFMT2 table
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# has MALI_BLEND_AU encodings for RGB565/RGB5A1/RGBA4/RGB10A2 on
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# PAN_ARCH 7). Closes the EXT_legacy_dithering gap surfaced by
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# marfrit/panvk-bifrost research/r6_r7_*. ARM blob r51p0 confirms the
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# extension as Mali-G52-architecture supported.
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patch -p1 < "${srcdir}/0006-panvk-bifrost-legacy-dithering.patch"
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# r7 (2026-05-25): XFB store channel-extract fix for packed varyings.
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# Eliminates a reliable SIGSEGV in vkCreateGraphicsPipeline whenever
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# an XFB-bound vertex output is declared with non-zero
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# `layout (component=N)`. Surfaced by dEQP-VK.transform_feedback.
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# simple.holes_vert (now Fails on color-check rather than crashing;
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# the color-check residual is a separate iter20 finding).
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# Phase-doc context: ~/src/panvk-bifrost/iter19/phase{0,1,2,3}_*.md.
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# Phase 5 reviewed; release-mode-elision defensive guards applied.
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patch -p1 < "${srcdir}/0007-panvk-bifrost-xfb-component-base-fix.patch"
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# r9 (2026-05-25): bump maxImageDimension3D from 512 to 2048 on Bifrost,
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# unblocking Dawn/WebGPU adapter acceptance for Brave's GPU process. Was
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# under WebGPU's 2048 minimum (dawn PhysicalDeviceVk.cpp:746). Same patch
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# also removes three release-mode-masked wrong-invariant asserts in
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# get_max_3d_image_size() that would fire in debug builds post-r9.
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# Phase-doc context: ~/src/panvk-bifrost/iter22/phase0to2_max3d_close.md.
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patch -p1 < "${srcdir}/0008-panvk-bifrost-bump-max-image-dim-3d-for-dawn.patch"
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# Sanity-check the patches landed.
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grep -q "KHR_robustness2 = true," src/panfrost/vulkan/panvk_vX_physical_device.c
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grep -q "EXT_robustness2 = true," src/panfrost/vulkan/panvk_vX_physical_device.c
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grep -q "nullDescriptor = true," src/panfrost/vulkan/panvk_vX_physical_device.c
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grep -q "has_vk1_1 = true;" src/panfrost/vulkan/panvk_vX_physical_device.c
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grep -q "has_vk1_2 = true;" src/panfrost/vulkan/panvk_vX_physical_device.c
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# iter13 sanity:
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grep -q "EXT_transform_feedback = PAN_ARCH < 9," src/panfrost/vulkan/panvk_vX_physical_device.c
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test -f src/panfrost/vulkan/jm/panvk_vX_cmd_xfb.c
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# iter17 sanity: pan_nir_lower_xfb call site has been replaced; new file present.
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grep -q "panvk_per_arch(nir_lower_xfb)" src/panfrost/vulkan/panvk_vX_shader.c
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# r5 sanity: fragmentStoresAndAtomics = true patch landed
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grep -q "fragmentStoresAndAtomics = true ||" src/panfrost/vulkan/panvk_vX_physical_device.c
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# r6 sanity: VK_EXT_legacy_dithering advertised
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grep -q '\.EXT_legacy_dithering = true,' src/panfrost/vulkan/panvk_vX_physical_device.c
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grep -q '\.legacyDithering = true,' src/panfrost/vulkan/panvk_vX_physical_device.c
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grep -q "xfb_topology" src/panfrost/vulkan/panvk_shader.h
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grep -q "panvk_xfb_topology" src/panfrost/vulkan/panvk_shader.h
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test -f src/panfrost/vulkan/panvk_vX_xfb_lower.c
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# r7 sanity: XFB channel-base correction landed
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grep -q "iter19: nir_intrinsic_component(intr) is the source-channel base" src/panfrost/vulkan/panvk_vX_xfb_lower.c
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grep -q "mask << src_channel" src/panfrost/vulkan/panvk_vX_xfb_lower.c
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# r9 sanity: maxImageDimension3D bumped + asserts removed
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grep -q "PAN_ARCH <= 10 ? (1 << 11) : (1 << 14)" src/panfrost/vulkan/panvk_vX_physical_device.c
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! grep -q "assert(ret\.width >= phys_dev->vk\.properties\.maxImageDimension3D)" src/panfrost/vulkan/panvk_physical_device.c
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}
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build() {
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cd "mesa-${_mesaver}"
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# Minimal Mesa build — only the panvk Vulkan driver. No GLES/GLX/EGL/
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# gallium drivers — keeps the build narrower and avoids pulling in
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# the entire Mesa runtime in this package's dep graph.
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meson setup build/ \
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--prefix=/usr \
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--libdir=lib \
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--buildtype=release \
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-Dvulkan-drivers=panfrost \
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-Dgallium-drivers= \
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-Dplatforms=wayland,x11 \
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-Dglx=disabled \
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-Degl=disabled \
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-Dgles1=disabled \
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-Dgles2=disabled \
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-Dvulkan-layers= \
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-Dtools= \
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-Dgallium-rusticl=false \
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-Dmicrosoft-clc=disabled
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meson compile -C build
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}
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package() {
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cd "${srcdir}/mesa-${_mesaver}"
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# Patched lib — co-install path, NOT /usr/lib (to avoid clashing
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# with stock mesa's libvulkan_panfrost.so).
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install -Dm755 build/src/panfrost/vulkan/libvulkan_panfrost.so \
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"$pkgdir/usr/lib/panvk-bifrost/libvulkan_panfrost.so"
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# Custom ICD JSON. NOT under /usr/share/vulkan/icd.d/ (the default
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# loader search path) — the user has to opt in via VK_ICD_FILENAMES.
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install -Dm644 "$srcdir/icd.json" \
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"$pkgdir/usr/lib/panvk-bifrost/icd.json"
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# The brave-vulkan launcher wires up env + flags.
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install -Dm755 "$srcdir/brave-vulkan" "$pkgdir/usr/bin/brave-vulkan"
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}
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