Clang warns:

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:5089:60:
warning: suggest braces around initialization of subobject
[-Wmissing-braces]
                struct dc_surface_update dummy_updates[MAX_SURFACES] = { 0 };
                                                                         ^
                                                                         {}

Previous efforts to fix this type of warning by adding or removing
braces have been met with some pushback in favor of using memset [1][2].
Do that here, mirroring commit 05794eff1aa6 ("drm/amdgpu/gmc: fix
compiler errors [-Werror,-Wmissing-braces] (V2)") in this tree.

[1]: https://lore.kernel.org/lkml/022e41c0-8465-dc7a-a45c-64187ecd9...@amd.com/
[2]: 
https://lore.kernel.org/lkml/20181128.215241.702406654469517539.da...@davemloft.net/

Fixes: 02d6a6fcdf68 ("drm/amd/display: Simplify underscan and ABM commit")
Signed-off-by: Nathan Chancellor <natechancel...@gmail.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 1c1c162c4eee..f70f4bbde665 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5089,10 +5089,13 @@ static void amdgpu_dm_atomic_commit_tail(struct 
drm_atomic_state *state)
                struct dm_connector_state *dm_new_con_state = 
to_dm_connector_state(new_con_state);
                struct dm_connector_state *dm_old_con_state = 
to_dm_connector_state(old_con_state);
                struct amdgpu_crtc *acrtc = 
to_amdgpu_crtc(dm_new_con_state->base.crtc);
-               struct dc_surface_update dummy_updates[MAX_SURFACES] = { 0 };
-               struct dc_stream_update stream_update = { 0 };
+               struct dc_surface_update dummy_updates[MAX_SURFACES];
+               struct dc_stream_update stream_update;
                struct dc_stream_status *status = NULL;
 
+               memset(&dummy_updates, 0, sizeof(dummy_updates));
+               memset(&stream_update, 0, sizeof(stream_update));
+
                if (acrtc) {
                        new_crtc_state = drm_atomic_get_new_crtc_state(state, 
&acrtc->base);
                        old_crtc_state = drm_atomic_get_old_crtc_state(state, 
&acrtc->base);
-- 
2.20.1

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