drm/amd/display: Cap DML2.1 vmin ODM combine at 2:1 for eDP

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[Why]
Currently in DML2.1, by design, the DPMs are unpinned when optimizing
for Vmin PMO. This leads to an issue on DCN42 on specific panels (e.g. 4k144 eDP)
where ODM4:1 is applied unexpectedly, which affects the urgent bandwidth required,
raises DCFCLK to DPM1, and thus blocks Z8.

[How]
Clamp the ODM combine limit to 2 for eDP streams directly in
pmo_dcn4_fams2_optimize_for_vmin()

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Leo Chen <leo.chen@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Leo Chen 2026-08-31 16:37:48 -04:00 • committed by Alex Deucher

parent 2f08de495c

commit ec0c15a270

1 changed files with 10 additions and 1 deletions

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drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c

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