drm/amd/display: Set compbuf size to min at prep prevent overbook crb

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[Why]
Detbuffer size is dynamically set for dcn31x. At certain moment,
compbuf+(def size * num pipes) > config return buffer size causing
flickering. This is easily reproducible when MPO is
enabled with two displays.

[How]
At prepare BW, use the min comp buffer size. When it is to
optimize BW, set compbuf size back to maximum possible size.

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Duncan Ma <duncanma@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Duncan Ma 2022-02-08 15:05:09 -05:00 • committed by Alex Deucher

parent e0adbe73d7

commit 2e6e14c9e4

2 changed files with 11 additions and 2 deletions

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12

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c

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1

drivers/gpu/drm/amd/display/dc/dml/display_mode_structs.h

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