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package/mesa3d: make LLVM optional for radeonsi

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Since mesa3d v26.0 [0], the ACO compiler has been the default over LLVM.
This shader compiler backend has been used for even longer by the RADV
vulkan driver.

Let's make LLVM optional.

Users who wish to continue using LLVM must enable support in Mesa, and
override the default ACO compiler at runtime using an env var. [1]

Users who only want to use the default compiler backend may disable LLVM
support, and save a lot of time during the build.

[0] e26c28f311
[1] https://docs.mesa3d.org/envvars.html#envvar-AMD_DEBUG

Signed-off-by: Joseph Kogut <joseph@anodize.com>
Reviewed-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
This commit is contained in:
Joseph Kogut
2026-05-14 14:24:32 -07:00
committed by Romain Naour
parent 30c34bdef3
commit a24698054b
1 changed files with 9 additions and 2 deletions
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11
package/mesa3d/Config.in
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@@ -252,17 +252,24 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_RADEONSI
bool "Gallium Radeon SI driver"
depends on BR2_USE_MMU # libdrm
depends on BR2_i386 || BR2_x86_64
depends on BR2_PACKAGE_MESA3D_LLVM
select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
select BR2_PACKAGE_LIBDRM_AMDGPU
select BR2_PACKAGE_LIBDRM_RADEON
select BR2_PACKAGE_LLVM_AMDGPU
select BR2_PACKAGE_LLVM_AMDGPU if BR2_PACKAGE_MESA3D_LLVM
select BR2_PACKAGE_ELFUTILS
select BR2_PACKAGE_MESA3D_NEEDS_ELFUTILS
select BR2_PACKAGE_MESA3D_RUSTICL_SUPPORTED_DRIVER
help
Driver for ATI/AMD Radeon HD7000/HD8000/Rx200 GPUs.
Since Mesa 26.0.0, the default shader compiler is ACO,
even when LLVM support is enabled at build time.
Use the env var AMD_DEBUG=usellvm to override the
default and use LLVM at runtime.
https://docs.mesa3d.org/envvars.html#envvar-AMD_DEBUG
config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_SVGA
bool "Gallium vmware svga driver"
depends on BR2_i386 || BR2_x86_64