drm/amd/display: Add DMCU memory low power support

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[Why]
On some platforms, DMCU is no longer used. In these cases, some DMCU
memory should be completely powered off to save power.

[How]
1. Set DMCU_ERAM_MEM_PWR_FORCE to shutdown memory when DMCU is not in
   use
2. Added a debug option to allow this behaviour to be turned off
3. Set all memory low power debug options to off first, to not
   immediately cause problems

Signed-off-by: Jacky Liao <ziyu.liao@amd.com>
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Jacky Liao 2020-10-21 17:31:26 -04:00 • committed by Alex Deucher

parent 949c5cde3e

commit 96879ad3e4

3 changed files with 14 additions and 2 deletions

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2

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

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7

drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h

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7

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c

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