Re: [PATCH 18/40] drm/amd/display/dc/dce112/Makefile: Ignore -Woverride-init warning

[Alex Deucher <alexdeucher@gmail.com>]

On Mon, Jan 11, 2021 at 2:20 PM Lee Jones <lee.jones@linaro.org> wrote:
>
> This file uses a complex abstracted set of hierarchical macros to
> setup its applicable register lists within constant structures.
> However in the case of TMDS_CNTL we wish to mark it as not applicable
> for this use-case.
>
> One method would be to de-const all of the definitions and users, then
> manually zero out TMDS_CNTL from the list.  Another would be to create
> a new set of hierarchical macros to omit TMDS_CNTL entirely.  Both
> would entail a great deal of unnecessary changes and maintenance
> burden.
>
> Fixes the following W=1 kernel build warning(s):
>
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: warning: initialized field overwritten [-Woverride-init]
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:290:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: note: (near initialization for ‘stream_enc_regs[0].TMDS_CNTL’)
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:290:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: warning: initialized field overwritten [-Woverride-init]
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:291:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: note: (near initialization for ‘stream_enc_regs[1].TMDS_CNTL’)
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:291:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: warning: initialized field overwritten [-Woverride-init]
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:292:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: note: (near initialization for ‘stream_enc_regs[2].TMDS_CNTL’)
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:292:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: warning: initialized field overwritten [-Woverride-init]
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:293:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: note: (near initialization for ‘stream_enc_regs[3].TMDS_CNTL’)
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:293:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: warning: initialized field overwritten [-Woverride-init]
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:294:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: note: (near initialization for ‘stream_enc_regs[4].TMDS_CNTL’)
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:294:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: warning: initialized field overwritten [-Woverride-init]
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:295:2: note: in expansion of macro ‘stream_enc_regs’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:286:15: note: (near initialization for ‘stream_enc_regs[5].TMDS_CNTL’)
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce112/dce112_resource.c:295:2: note: in expansion of macro ‘stream_enc_regs’
>
> Cc: Harry Wentland <harry.wentland@amd.com>
> Cc: Leo Li <sunpeng.li@amd.com>
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: "Christian König" <christian.koenig@amd.com>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: amd-gfx@lists.freedesktop.org
> Cc: dri-devel@lists.freedesktop.org
> Signed-off-by: Lee Jones <lee.jones@linaro.org>

Applied.  Thanks!

Alex

> ---
>  drivers/gpu/drm/amd/display/dc/dce112/Makefile | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce112/Makefile b/drivers/gpu/drm/amd/display/dc/dce112/Makefile
> index 8e090446d5119..9de6501702d2c 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce112/Makefile
> +++ b/drivers/gpu/drm/amd/display/dc/dce112/Makefile
> @@ -23,6 +23,8 @@
>  # Makefile for the 'controller' sub-component of DAL.
>  # It provides the control and status of HW CRTC block.
>
> +CFLAGS_$(AMDDALPATH)/dc/dce112/dce112_resource.o = $(call cc-disable-warning, override-init)
> +
>  DCE112 = dce112_compressor.o dce112_hw_sequencer.o \
>  dce112_resource.o
>
> --
> 2.25.1
>
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