drm/amd/display: Force flush after write to IPS driver signals

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[Why]
It's possible that the write hasn't fully completed by the time we
send (and flush) a command to DMCUB to notify idle to request IPS2
exit.

[How]
Perform a readback of the volatile structure into dc_dmub_srv state.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Nicholas Kazlauskas 2024-04-08 10:45:04 -04:00 • committed by Alex Deucher

parent dc2be9c68f

commit ef4af63e10

2 changed files with 3 additions and 0 deletions

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2

drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c

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1

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

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