drm/amd/display: WA for DF keeps awake after S0i3.

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[Why]
DF keeps awake after S0i3 resume due to DRAM_STATE_CNTL
is set by bios command table during dcn init_hw.

[How]
As a work around, check STATE_CNTL status before init_hw,
if it is 0 before init_hw and set to 1 after init_hw,
change it to 0.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Yongqiang Sun 2018-09-17 10:05:51 -04:00 • committed by Alex Deucher

parent e15fc81f11

commit ceb9831dd6

3 changed files with 35 additions and 0 deletions

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17

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c

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4

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h

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14

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

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