drm/amd/display: Fix crash during MPO + ODM combine mode recalculation

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[Why]
When calculating recout width for an MPO plane on a mode that's using
ODM combine, driver can calculate a negative value, resulting in a
crash.

[How]
For negative widths, use zero such that validation will prune the
configuration correctly and disallow MPO.

Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Aric Cyr 2021-05-25 15:33:51 -04:00 • committed by Alex Deucher

parent e4e3678260

commit 665f28507a

1 changed files with 5 additions and 0 deletions

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drivers/gpu/drm/amd/display/dc/core/dc_resource.c

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