drm/amd/pm: compute SMU v15.0.0 gpu_metrics from accumulator table

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Rework smu_v15_0_0_get_gpu_metrics() to derive values from the raw
accumulator double-buffer instead of the firmware-computed SmuMetrics_t
snapshot:

- Add SMU_V15_IOD_AVG()/SMU_V15_CORE_AVG() helpers: wrapping_sub() delta
  over the sampling window, scaled by the caller's unit factor, then
  descaled from Q10 fixed-point with >>10 (scale before shift to keep
  sub-unit precision); typeof() preserves each field's width.
- Reuse the same macro in smu_v15_0_0_compute_all_metrics(), dropping
  the open-coded div_u64(..., 1024) boilerplate.
- Drop the unused smu_v15_0_0_get_gpu_metrics_table() helper and the
  SMU_TABLE_SMU_METRICS allocation.

Signed-off-by: Shubhankar Milind Sardeshpande <Shubhankar.MilindSardeshpande@amd.com>
Assisted-by: Claude:claude-opus-4.8
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Shubhankar Milind Sardeshpande 2026-08-07 15:45:18 +05:30 • committed by Alex Deucher

parent 968b69dd79

commit d870f2f01b

2 changed files with 142 additions and 188 deletions

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46

drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu15_driver_if_v15_0_0.h

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270

drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_0_ppt.c

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