drm/amd/display: Add Debug Option To Enable Per-DPM De-rate Usage

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[Why]
DML has been updated to use per-DPM derates when provided but per-DPM de-rates have not been finalized.
Need to validate to see what values should be stored in the bounding box.

[How]
Add debug options to set custom derates per DPM (starting at DPM0) and their values

Each entry in the custom derate expects the derates to be stored in the following format:
bits 0-7: dram_derate_percent_pixel
bits 8-15: fclk_derate_percent
bits 16-23: dcfclk_derate_percent
bits 24-31 are unused.

e.g. Using the value 0x414020 will set the following derates for DPM0
DPM0: 0x20, 0x40, 0x41 for dram, fclk, and dcfclk respectively

Note that global derate value will be used if the per-DPM derate is 0.

Reviewed-by: Jun Lei <jun.lei@amd.com>
Signed-off-by: Austin Zheng <Austin.Zheng@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Austin Zheng 2026-06-09 19:01:13 -04:00 • committed by Alex Deucher

parent 19e01bbaa1

commit e82936e8da

2 changed files with 18 additions and 0 deletions

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drivers/gpu/drm/amd/display/dc/dc.h

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16

drivers/gpu/drm/amd/display/dc/soc_and_ip_translator/dcn401/dcn401_soc_and_ip_translator.c

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