drm/amd/display: copy function name into dcn_fpu trace event

Userspace trace tools that use libtraceevent to read binary buffer only
see a kernel address when printing const char *. Use string macros in
dcn_fpu to copy the function name into the trace event.

Fixes: 96ee63730fa3 ("drm/amd/display: Add control mechanism for FPU")
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h
index 7de4fe355c5d..b2f38654e489 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h
@@ -637,20 +637,20 @@ TRACE_EVENT(dcn_fpu,
 
 	    TP_STRUCT__entry(
 			     __field(bool, begin)
-			     __field(const char *, function)
+			     __string(function, function)
 			     __field(int, line)
 			     __field(int, recursion_depth)
 	    ),
 	    TP_fast_assign(
 			   __entry->begin = begin;
-			   __entry->function = function;
+			   __assign_str(function);
 			   __entry->line = line;
 			   __entry->recursion_depth = recursion_depth;
 	    ),
 	    TP_printk("%s: recursion_depth: %d: %s()+%d:",
 		      __entry->begin ? "begin" : "end",
 		      __entry->recursion_depth,
-		      __entry->function,
+		      __get_str(function),
 		      __entry->line
 	    )
 );