Re: [PATCH] drm/amd/display: fix non-x86/PPC64 compilation

[Harry Wentland <harry.wentland@amd.com>]

On 2022-07-06 17:42, Alex Deucher wrote:
> Need to protect FP DMCUB code with CONFIG_DRM_AMD_DC_DCN.
> Fixes build failures like the following on arm64:
> ERROR: modpost: "__floatunsidf" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "__divdf3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "fma" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "__adddf3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "__fixdfsi" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "__muldf3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "__floatsidf" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "__fixunsdfsi" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> 
> Fixes: 85f4bc0c333c ("drm/amd/display: Add SubVP required code")
> Reported-by: Nathan Chancellor <nathan@kernel.org>
> Tested-by: Nathan Chancellor <nathan@kernel.org>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Reviewed-by: Harry Wentland <harry.wentland@amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c  | 2 ++
>  drivers/gpu/drm/amd/display/dc/dcn32/Makefile | 1 -
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
> index 6a25d64dd15c..6b446ae9e91f 100644
> --- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
> +++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
> @@ -370,6 +370,7 @@ void dc_dmub_srv_query_caps_cmd(struct dmub_srv *dmub)
>  	}
>  }
>  
> +#ifdef CONFIG_DRM_AMD_DC_DCN
>  /**
>   * ***********************************************************************************************
>   * populate_subvp_cmd_drr_info: Helper to populate DRR pipe info for the DMCUB subvp command
> @@ -698,6 +699,7 @@ void dc_dmub_setup_subvp_dmub_command(struct dc *dc,
>  	dc_dmub_srv_cmd_execute(dc->ctx->dmub_srv);
>  	dc_dmub_srv_wait_idle(dc->ctx->dmub_srv);
>  }
> +#endif
>  
>  bool dc_dmub_srv_get_diagnostic_data(struct dc_dmub_srv *dc_dmub_srv, struct dmub_diagnostic_data *diag_data)
>  {
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/Makefile b/drivers/gpu/drm/amd/display/dc/dcn32/Makefile
> index fe29725b4c06..932d85fa4262 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn32/Makefile
> +++ b/drivers/gpu/drm/amd/display/dc/dcn32/Makefile
> @@ -27,7 +27,6 @@ ifdef CONFIG_CC_IS_GCC
>  ifeq ($(call cc-ifversion, -lt, 0701, y), y)
>  IS_OLD_GCC = 1
>  endif
> -dcn32_ccflags += -mhard-float
>  endif
>  
>  ifdef CONFIG_X86