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

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Message-ID: <YvU4GD8HtZ1A4dhI@debian>
Date:   Thu, 11 Aug 2022 18:10:48 +0100
From:   "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@...il.com>
To:     Alex Deucher <alexander.deucher@....com>,
        Hamza Mahfooz <hamza.mahfooz@....com>,
        Fangzhi Zuo <Jerry.Zuo@....com>
Cc:     Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-next@...r.kernel.org
Subject: build failure of next-20220811 due to b1a63a0b48ad
 ("drm/amd/display: consider DSC pass-through during mode validation")

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.

--
Regards
Sudip