On Fri, Nov 25, 2022 at 12:07:49PM +, Lee Jones wrote:
> calculate_bandwidth() is presently broken on all !(X86_64 || SPARC64 || ARM64)
> architectures built with Clang (all released versions), whereby the stack
> frame gets blown up to well over 5k. This would cause an immediate kernel
> panic on most architectures. We'll revert this when the following bug report
> has been resolved: https://github.com/llvm/llvm-project/issues/41896.
>
> Suggested-by: Arnd Bergmann
> Signed-off-by: Lee Jones
Reviewed-by: Nathan Chancellor
> ---
> drivers/gpu/drm/amd/display/Kconfig | 7 +++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/display/Kconfig
> b/drivers/gpu/drm/amd/display/Kconfig
> index 6925e0280dbe6..f4f3d2665a6b2 100644
> --- a/drivers/gpu/drm/amd/display/Kconfig
> +++ b/drivers/gpu/drm/amd/display/Kconfig
> @@ -5,6 +5,7 @@ menu "Display Engine Configuration"
> config DRM_AMD_DC
> bool "AMD DC - Enable new display engine"
> default y
> + depends on BROKEN || !CC_IS_CLANG || X86_64 || SPARC64 || ARM64
> select SND_HDA_COMPONENT if SND_HDA_CORE
> select DRM_AMD_DC_DCN if (X86 || PPC_LONG_DOUBLE_128)
> help
> @@ -12,6 +13,12 @@ config DRM_AMD_DC
> support for AMDGPU. This adds required support for Vega and
> Raven ASICs.
>
> + calculate_bandwidth() is presently broken on all !(X86_64 || SPARC64
> || ARM64)
> + architectures built with Clang (all released versions), whereby the
> stack
> + frame gets blown up to well over 5k. This would cause an immediate
> kernel
> + panic on most architectures. We'll revert this when the following
> bug report
> + has been resolved: https://github.com/llvm/llvm-project/issues/41896.
> +
> config DRM_AMD_DC_DCN
> def_bool n
> help
> --
> 2.38.1.584.g0f3c55d4c2-goog
>
