drm/amd/display: Allow Per-DPM De-rates Instead Of A Single Global Value

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[Why]
Currently only a singular de-rate is used for all DPM levels.
The intent was to limit the bandwidth utilization at high DPMs
so the display requirements are not competing with other engines for bandwidth.
At lower DPMs, the de-rates could be more lenient so more bandwidth can be
utilized without the need to increase the DPM level and result in potential power savings.
i.e. DPM0 could be achieved on certain display configs instead of DPM1
if de-rates were a couple percentage points higher

The system average de-rates can be adjusted as needed as only urgent de-rates are defined for the SOC.

[How]
Update QOS parameters to have a table of derates with a per-DPM granularity
If the per-DPM value is provided, that will value be used.
Otherwise use the global value if there is no DPM specific value.

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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This commit is contained in:

Austin Zheng 2026-06-10 09:22:47 -04:00 • committed by Alex Deucher

parent 687bd7c811

commit 8af429f6ef

2 changed files with 41 additions and 13 deletions

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13

drivers/gpu/drm/amd/display/dc/dml2_0/dml21/inc/dml_top_soc_parameter_types.h

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41

drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4_calcs.c

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