linux-kernel - Re: [PATCH] drm/amdgpu/dc: Really fix DCN3.1 Makefile for PPC64

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Date:   Fri, 25 Jun 2021 16:14:33 -0400
From:   Harry Wentland <harry.wentland@....com>
To:     Michal Suchanek <msuchanek@...e.de>,
        Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
        Alex Deucher <alexander.deucher@....com>
Cc:     Leo Li <sunpeng.li@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Arnd Bergmann <arnd@...db.de>,
        Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
        Will Deacon <will@...nel.org>, Huang Rui <ray.huang@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/amdgpu/dc: Really fix DCN3.1 Makefile for PPC64

On 2021-06-23 6:30 a.m., Michal Suchanek wrote:
> Also copy over the part that makes old gcc handling cross-platform.
> 
> Fixes: df7a1658f257 ("drm/amdgpu/dc: fix DCN3.1 Makefile for PPC64")
> Fixes: 926d6972efb6 ("drm/amd/display: Add DCN3.1 blocks to the DC Makefile")
> Signed-off-by: Michal Suchanek <msuchanek@...e.de>

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

Harry

> ---
> The fact that the old gcc handling triggers on gcc 10 and 11 is another
> story I don't want to delve into.
> ---
>  drivers/gpu/drm/amd/display/dc/dcn31/Makefile | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/Makefile b/drivers/gpu/drm/amd/display/dc/dcn31/Makefile
> index 5dcdc5a858fe..4bab97acb155 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn31/Makefile
> +++ b/drivers/gpu/drm/amd/display/dc/dcn31/Makefile
> @@ -28,6 +28,7 @@ endif
>  CFLAGS_$(AMDDALPATH)/dc/dcn31/dcn31_resource.o += -mhard-float
>  endif
>  
> +ifdef CONFIG_X86
>  ifdef IS_OLD_GCC
>  # Stack alignment mismatch, proceed with caution.
>  # GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3
> @@ -36,6 +37,7 @@ CFLAGS_$(AMDDALPATH)/dc/dcn31/dcn31_resource.o += -mpreferred-stack-boundary=4
>  else
>  CFLAGS_$(AMDDALPATH)/dc/dcn31/dcn31_resource.o += -msse2
>  endif
> +endif
>  
>  AMD_DAL_DCN31 = $(addprefix $(AMDDALPATH)/dc/dcn31/,$(DCN31))
>  
>