[PATCH] drm/amd/display: Fix Werror when building

[Wayne Lin]

[Why & How]
Got Werror when building with Clang-13:

drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dpia.c:195:2:
error: variable 'ts' is used uninitialized whenever switch default is
taken [-Werror,-Wsometimes-uninitialized]

        default:

        ^~~~~~~

drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dpia.c:200:9:
note: uninitialized use occurs here

        return ts;

               ^~

drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dpia.c:180:2:
note: variable 'ts' is declared here

        enum dpia_set_config_ts ts;

        ^

1 error generated.

Fix it.

Reported-by: Mike Lothian <m...@fireburn.co.uk>
Signed-off-by: Wayne Lin <wayne....@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c 
b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
index 6936b9d549e5..64d2461953c4 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
@@ -193,6 +193,7 @@ static enum dpia_set_config_ts 
convert_trng_ptn_to_trng_stg(enum dc_dp_training_
                ts = DPIA_TS_TPS4;
                break;
        default:
+               ts = DPIA_TS_DPRX_DONE;
                ASSERT(false); /* TPS not supported by helper function. */
                break;
        }
-- 
2.25.1