drm/amd/display: Use memset to initialize variables in fill_plane_dcc_attributes

Clang warns:

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:2314:38:
warning: suggest braces around initialization of subobject
[-Wmissing-braces]
        struct dc_surface_dcc_cap output = {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-64187ecd9684@amd.com/
[2]: https://lore.kernel.org/lkml/20181128.215241.702406654469517539.davem@davemloft.net/

Fixes: 7df7e505e82a ("drm/amd/display: Set requested plane state DCC params for GFX9")
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 640ac9d9f04fd2721d8111792c2e2ab5a08c74de..a08820f86f0f16b82847b40e01d22fe6f7e68eb0 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2297,12 +2297,15 @@ static bool fill_plane_dcc_attributes(struct amdgpu_device *adev,
                                      uint64_t info)
 {
        struct dc *dc = adev->dm.dc;
-       struct dc_dcc_surface_param input = {0};
-       struct dc_surface_dcc_cap output = {0};
+       struct dc_dcc_surface_param input;
+       struct dc_surface_dcc_cap output;
        uint32_t offset = AMDGPU_TILING_GET(info, DCC_OFFSET_256B);
        uint32_t i64b = AMDGPU_TILING_GET(info, DCC_INDEPENDENT_64B) != 0;
        uint64_t dcc_address;
 
+       memset(&input, 0, sizeof(input));
+       memset(&output, 0, sizeof(output));
+
        if (!offset)
                return false;