drm/amd/display: Force prefetch mode to 0

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[Why]
On APU should be always using prefetch mode 0.
Currently, sometimes prefetch mode 1 is being
used causing system to hard hang due to
minTTUVBlank being too low.

[How]
Any ASIC running DCN21 will by default allow
self refresh and mclk switch. This sets both
min and max prefetch mode to 0 by default.

Signed-off-by: Isabel Zhang <isabel.zhang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Isabel Zhang 2020-10-16 10:55:54 -04:00 • committed by Alex Deucher

parent 850d2fcf3e

commit 685b4d8142

1 changed files with 3 additions and 1 deletions

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drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c

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