drm/amd/display: Fix ABM over VABC

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[Why]
ABM does not take effect when brightness
is below twenty percent on VABC LCD panels.

[How]
Create new VESA aux path for brightness
translation functions. When VESA aux enabled
use zero-anchored linear interpolation to
translate instead of the legacy min max
backlight mapping.

Reviewed-by: Anthony Koo <anthony.koo@amd.com>
Signed-off-by: Iswara Nagulendran <Iswara.Nagulendran@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Iswara Nagulendran 2026-06-30 16:01:48 -04:00 • committed by Alex Deucher

parent 79e9adea27

commit c8746cd218

2 changed files with 210 additions and 14 deletions

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215

drivers/gpu/drm/amd/display/modules/power/power_abm.c

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9

drivers/gpu/drm/amd/display/modules/power/power_helpers.h

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