[PATCH 32/40] drm/amd/display/amdgpu_dm/amdgpu_dm: Mark 'link_bandwidth_kbps' as __maybe_unused

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'link_bandwidth_kbps' is always obtained, but only used if
CONFIG_DRM_AMD_DC_DCN is defined.

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function ‘create_stream_for_sink’:
 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:5080:11: warning: variable ‘link_bandwidth_kbps’ set but not used [-Wunused-but-set-variable]

Cc: Harry Wentland <harry.wentland@xxxxxxx>
Cc: Leo Li <sunpeng.li@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: "Christian König" <christian.koenig@xxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 08539f4315864..ac7643d73bc68 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5077,7 +5077,7 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	struct dsc_dec_dpcd_caps dsc_caps;
 #endif
-	uint32_t link_bandwidth_kbps;
+	uint32_t __maybe_unused link_bandwidth_kbps;
 
 	struct dc_sink *sink = NULL;
 	if (aconnector == NULL) {
-- 
2.25.1

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