drm/amd/display: Wait for ACK for INBOX0 HW Lock

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[Why]
In DC we want to wait for the INBOX0 HW Lock command to ACK before
continuing. This is to ensure that the lock has been successfully
acquired before programming HW in DC.

[How]
Add interfaces to send messages on INBOX0, poll for their completation
and clear the ack.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alvin Lee 2021-11-04 16:52:15 -04:00 • committed by Alex Deucher

parent 7a47c8820a

commit d493a0244f

5 changed files with 115 additions and 3 deletions

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37

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

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2

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

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3

drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c

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41

drivers/gpu/drm/amd/display/dmub/dmub_srv.h

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35

drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c

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