David Francis 0cf5eb76e2
drm/amd/display: Add tracing to dc ...
[Why]
Tracing is a useful and cheap debug functionality
[How]
This creates a new trace system amdgpu_dm, currently with
three trace events
amdgpu_dc_rreg and amdgpu_dc_wreg report the address and value
of any dc register reads and writes
amdgpu_dc_performance requires at least one of those two to be
enabled. It counts the register reads and writes since the
last entry
v2: Don't check for NULL before kfree
Signed-off-by: David Francis <David.Francis@amd.com >
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com >
Acked-by: Leo Li <sunpeng.li@amd.com >
Signed-off-by: Alex Deucher <alexander.deucher@amd.com >
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0cf5eb76e2