Phases 4, 5, and 6 of local/docs/3D-DRIVER-PLAN.md. The recipe
previously built Mesa with only softpipe, llvmpipe, virgl — meaning
the entire Intel and AMD hardware-accelerated path was absent.
Changes:
-Dgallium-drivers: softpipe,llvmpipe,virgl
-> softpipe,llvmpipe,virgl,iris,radeonsi
-Dvulkan-drivers: (empty)
-> intel,amd,swrast
This adds:
* iris — Intel Gen8+ hardware OpenGL driver (Skylake through
Meteor Lake; Phase 2 added LNL+PTL IDs to the kernel).
* radeonsi — AMD GCN+ hardware OpenGL driver.
* swrast — Vulkan software fallback (llvmpipe-equivalent for
Vulkan).
* intel — Mesa 'anv' Vulkan driver (Intel Gen8+).
* amd — Mesa 'radv' Vulkan driver (AMD GCN+).
Adding iris and the Intel Vulkan driver introduces a libclc
dependency (Core LLVM Compiler) — both use CLC infrastructure.
The cookbook handles this: libclc is already vendored at
recipes/dev/llvm21/source/libclc and is built as a Mesa
subproject during cross-compilation.
NOTE: This recipe change only adds the build-time drivers. To
actually USE these drivers at runtime requires:
- Phase 3 (Redox EGL platform) — currently deferred; the
EGL loader must be able to open /scheme/drm/card0 and select
the right DRI driver.
- Phase 4 winys (Redox iris winsys) — required for iris to map
onto the Redox-drm ioctl path.
- Phase 5 winsys (Redox radeonsi winsys) — required for radeonsi
on Redox.
Until those run, enabling these drivers in -Dgallium-drivers
will compile more code but not produce a working runtime path.
That is the explicit acceptance criterion of the 3D plan: code
presence is not support, build success is not support.
The build is verified via:
- meson config parses without error
- 'kmsro' was removed (Mesa 26.1.4 dropped it)
- libclc is now required (added)
- vulkan drivers are all valid
The cookbook's existing -Dshared-llvm=disabled path is preserved
(cross-build does not need the host llvm21 linked into the
guest; the recipe already exports LLVM_CONFIG pointing at the
cross-llvm21).
vasilito
08f3e71d41