drm/amd/display: Update de-tile override to anticipate pipe splitting

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[Why]
For certain MPO configurations, DML will split a pipe after DET buffer has
already been allocated by driver, resulting in allocation of more DET
segments than the configurable return buffer has, causing underflow.

[How]
Determine during DET override calculation whether or not a pipe will be
split later on by DML, and distribute DET segments based on expected
number of pipes.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Taimur Hassan <Syed.Hassan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Taimur Hassan 2022-07-05 12:22:09 -04:00 • committed by Alex Deucher

parent a983d26318

commit 44b0c96420

3 changed files with 69 additions and 71 deletions

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22

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c

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6

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h

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112

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c

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