drm/amd/display: Add CACP ACE curve area debugfs for IGT validation

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[Why]
IGT test cases for CACP need a way to validate that the ACE
(Adaptive Contrast Enhancement) curve responds to the CACP
aggression level. No interface exists to read the resulting
curve back from firmware for automated validation.

[How]
Add a read-only "cacp_ace_curve_area" debugfs node on eDP
connectors that support CACP. It issues a
DMUB_CMD__CACP_GET_ACE_CURVE_AREA command and reports the area
under the ACE PWL curve returned by firmware, which is directly
comparable across CACP levels, so IGT tests can query it per panel.

Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: James Lin <pinglei.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Chenyu Chen 2026-06-25 18:53:21 +08:00 • committed by Alex Deucher

parent f1c8dd4e74

commit 5ea44e1347

1 changed files with 68 additions and 0 deletions

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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

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