drm/amd/display: Copy WM values from set A to other sets in hw_init

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[Why]
When we transfer the WM range table to SMU, they can perform a watermark
switch right away. This can be a problem if we're in not in accelerated mode
during hw_init as SMU may initiate a dummy p-state change before the rest
of the watermarks are programmed. Watermark set A is defined to be
sufficient for all cases, so we can copy the values from set A to all other
sets, avoiding any issues from SMU doing WM switches.

[How]
 - new hubbub func init_watermarks
 - copy register values from set A to all other sets
 - call init_watermarks before calling notify_wm_ranges

Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Joshua Aberback 2020-09-23 15:12:39 -04:00 • committed by Alex Deucher

parent 3e19095534

commit 7c4ed1df0a

3 changed files with 47 additions and 0 deletions

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43

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hubbub.c

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2

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hubbub.h

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2

drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h

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