linux-kernel - Re: build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

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Date:   Thu, 11 Aug 2022 18:37:41 +0100
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     Alex Deucher <alexander.deucher@....com>,
        Hamza Mahfooz <hamza.mahfooz@....com>,
        Fangzhi Zuo <Jerry.Zuo@....com>,
        David Airlie <airlied@...ux.ie>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-next <linux-next@...r.kernel.org>,
        amd-gfx mailing list <amd-gfx@...ts.freedesktop.org>,
        Christian König <christian.koenig@....com>
Subject: Re: build failure of next-20220811 due to b1a63a0b48ad
 ("drm/amd/display: consider DSC pass-through during mode validation")

On Thu, Aug 11, 2022 at 6:16 PM Alex Deucher <alexdeucher@...il.com> wrote:
>
> On Thu, Aug 11, 2022 at 1:11 PM Sudip Mukherjee (Codethink)
> <sudipm.mukherjee@...il.com> wrote:
> >
> > Hi All,
> >
> > Not sure if it has been reported, builds of riscv, alpha, s390, arm,
> > arm64, xtensa, mips, csky allmodconfig have failed to build next-20220811
> > with the error:
> >
> > ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> > ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> >
> > git bisect pointed to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")
> > And, reverting that commit has fixed the build failure.
> >
> > I will be happy to test any patch or provide any extra log if needed.
>
> https://patchwork.freedesktop.org/patch/497116/

Thanks, that has fixed this failure. But it has now caused these new
errors resulting in a build failure.

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:
In function 'dm_dp_mst_is_port_support_mode':
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1427:32:
error: unused variable 'bw_range' [-Werror=unused-variable]
 1427 |         struct dc_dsc_bw_range bw_range = {0};
      |                                ^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1426:22:
error: unused variable 'max_compressed_bw_in_kbps'
[-Werror=unused-variable]
 1426 |         unsigned int max_compressed_bw_in_kbps = 0;
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1425:49:
error: unused variable 'down_link_bw_in_kbps'
[-Werror=unused-variable]
 1425 |         unsigned int upper_link_bw_in_kbps = 0,
down_link_bw_in_kbps = 0;
      |                                                 ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1425:22:
error: unused variable 'upper_link_bw_in_kbps'
[-Werror=unused-variable]
 1425 |         unsigned int upper_link_bw_in_kbps = 0,
down_link_bw_in_kbps = 0;
      |                      ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1424:22:
error: unused variable 'end_to_end_bw_in_kbps'
[-Werror=unused-variable]
 1424 |         unsigned int end_to_end_bw_in_kbps = 0;
      |                      ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1423:33:
error: unused variable 'cur_link_settings' [-Werror=unused-variable]
 1423 |         struct dc_link_settings cur_link_settings;



-- 
Regards
Sudip