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Date:   Tue, 8 Jan 2019 11:12:41 +1100
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Daniel Vetter <daniel.vetter@ffwll.ch>,
        Intel Graphics <intel-gfx@lists.freedesktop.org>,
        DRI <dri-devel@lists.freedesktop.org>
Cc:     Linux Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Rob Clark <robdclark@gmail.com>,
        Boris Brezillon <boris.brezillon@bootlin.com>,
        Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>
Subject: linux-next: build failure after merge of the drm-misc tree
Message-ID: <20190108111230.2dd3abd9@canb.auug.org.au>
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Sender: linux-kernel-owner@vger.kernel.org
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Hi all,

After merging the drm-misc tree, today's linux-next build (x86_64
allmodconfig) failed like this:

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function 'amdgpu_dm_mode_config_init':
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:1695:30: error: passing argument 1 of 'drm_atomic_private_obj_init' from incompatible pointer type [-Werror=incompatible-pointer-types]
  drm_atomic_private_obj_init(&adev->dm.atomic_obj,
                              ^~~~~~~~~~~~~~~~~~~~
In file included from include/drm/drm_dp_mst_helper.h:27,
                 from drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h:46,
                 from drivers/gpu/drm/amd/amdgpu/amdgpu.h:57,
                 from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:34:
include/drm/drm_atomic.h:437:53: note: expected 'struct drm_device *' but argument is of type 'struct drm_private_obj *'
 void drm_atomic_private_obj_init(struct drm_device *dev,
                                  ~~~~~~~~~~~~~~~~~~~^~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:1696:9: error: passing argument 2 of 'drm_atomic_private_obj_init' from incompatible pointer type [-Werror=incompatible-pointer-types]
         &state->base,
         ^~~~~~~~~~~~
In file included from include/drm/drm_dp_mst_helper.h:27,
                 from drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h:46,
                 from drivers/gpu/drm/amd/amdgpu/amdgpu.h:57,
                 from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:34:
include/drm/drm_atomic.h:438:30: note: expected 'struct drm_private_obj *' but argument is of type 'struct drm_private_state *'
      struct drm_private_obj *obj,
      ~~~~~~~~~~~~~~~~~~~~~~~~^~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:1697:9: error: passing argument 3 of 'drm_atomic_private_obj_init' from incompatible pointer type [-Werror=incompatible-pointer-types]
         &dm_atomic_state_funcs);
         ^~~~~~~~~~~~~~~~~~~~~~
In file included from include/drm/drm_dp_mst_helper.h:27,
                 from drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h:46,
                 from drivers/gpu/drm/amd/amdgpu/amdgpu.h:57,
                 from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:34:
include/drm/drm_atomic.h:439:32: note: expected 'struct drm_private_state *' but argument is of type 'struct drm_private_state_funcs *'
      struct drm_private_state *state,
      ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:1695:2: error: too few arguments to function 'drm_atomic_private_obj_init'
  drm_atomic_private_obj_init(&adev->dm.atomic_obj,
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/drm/drm_dp_mst_helper.h:27,
                 from drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h:46,
                 from drivers/gpu/drm/amd/amdgpu/amdgpu.h:57,
                 from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:34:
include/drm/drm_atomic.h:437:6: note: declared here
 void drm_atomic_private_obj_init(struct drm_device *dev,
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~

Caused by commit

  b962a12050a3 ("drm/atomic: integrate modeset lock with private objects")

interacting with commit

  eb3dc8978596 ("drm/amd/display: Use private obj helpers for dm_atomic_state")

from Linus' tree (merged during the merge window).

Its not obvious how to fix this up, so I have used the drm-misc tree
from next-20190107 for today.

-- 
Cheers,
Stephen Rothwell