linux-kernel - Re: [PATCH 16/34] drm/amd/display/dc/dce/dce_transform: Remove superfluous re-initialisation of DCFE_MEM_LIGHT_SLEEP

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Message-ID: <CADnq5_PmyZyZLO1N0q2fMM9NKPYYiMhbPBfgFyeOAWgi-i1MFg@mail.gmail.com>
Date:   Thu, 27 May 2021 00:12:46 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Leo Li <sunpeng.li@....com>, Mauro Rossi <issor.oruam@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        David Airlie <airlied@...ux.ie>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH 16/34] drm/amd/display/dc/dce/dce_transform: Remove
 superfluous re-initialisation of DCFE_MEM_LIGHT_SLEEP_CNTL,

On Wed, May 26, 2021 at 4:48 AM Lee Jones <lee.jones@...aro.org> wrote:
>
> Fixes the following W=1 kernel build warning(s):
>
>  drivers/gpu/drm/amd/amdgpu/../display/modules/hdcp/hdcp_psp.c:374:22: warning: no previous prototype for ‘mod_hdcp_hdcp1_get_link_encryption_status’
>  In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dce60/dce60_resource.c:28:
>  drivers/gpu/drm/amd/amdgpu/../include/asic_reg/dce/dce_6_0_d.h:568:43: warning: initialized field overwritten [-Woverride-init]
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce60/dce60_resource.c:157:14: note: in expansion of macro ‘mmCRTC0_DCFE_MEM_LIGHT_SLEEP_CNTL’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_transform.h:170:2: note: in expansion of macro ‘SRI’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce60/dce60_resource.c:183:3: note: in expansion of macro ‘XFM_COMMON_REG_LIST_DCE60’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce60/dce60_resource.c:187:3: note: in expansion of macro ‘transform_regs’
>  drivers/gpu/drm/amd/amdgpu/../include/asic_reg/dce/dce_6_0_d.h:568:43: note: (near initialization for ‘xfm_regs[0].DCFE_MEM_LIGHT_SLEEP_CNTL’)
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce60/dce60_resource.c:157:14: note: in expansion of macro ‘mmCRTC0_DCFE_MEM_LIGHT_SLEEP_CNTL’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_transform.h:170:2: note: in expansion of macro ‘SRI’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce60/dce60_resource.c:183:3: note: in expansion of macro ‘XFM_COMMON_REG_LIST_DCE60’
>  drivers/gpu/drm/amd/amdgpu/../display/dc/dce60/dce60_resource.c:187:3: note: in expansion of macro ‘transform_regs’
>  drivers/gpu/drm/amd/amdgpu/../include/asic_reg/dce/dce_6_0_d.h:645:43: warning: initialized field overwritten [-Woverride-init]
>
> Cc: Harry Wentland <harry.wentland@....com>
> Cc: Leo Li <sunpeng.li@....com>
> Cc: Alex Deucher <alexander.deucher@....com>
> Cc: "Christian König" <christian.koenig@....com>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Daniel Vetter <daniel@...ll.ch>
> Cc: Mauro Rossi <issor.oruam@...il.com>
> Cc: amd-gfx@...ts.freedesktop.org
> Cc: dri-devel@...ts.freedesktop.org
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  drivers/gpu/drm/amd/display/dc/dce/dce_transform.h | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_transform.h b/drivers/gpu/drm/amd/display/dc/dce/dce_transform.h
> index cbce194ec7b82..e98b5d4141739 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce/dce_transform.h
> +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_transform.h
> @@ -166,8 +166,7 @@
>         SRI(SCL_F_SHARP_CONTROL, SCL, id)
>
>  #define XFM_COMMON_REG_LIST_DCE60(id) \
> -       XFM_COMMON_REG_LIST_DCE60_BASE(id), \
> -       SRI(DCFE_MEM_LIGHT_SLEEP_CNTL, CRTC, id)
> +       XFM_COMMON_REG_LIST_DCE60_BASE(id)

I believe this should be kept and it should be removed from
XFM_COMMON_REG_LIST_DCE60_BASE().

Alex

>  #endif
>
>  #define XFM_SF(reg_name, field_name, post_fix)\
> --
> 2.31.1
>