drm/amd/display: Exit idle optimizations before HDCP execution

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[ Upstream commit f30a3bea92 ]

[WHY]
PSP can access DCN registers during command submission and we need
to ensure that DCN is not in PG before doing so.

[HOW]
Add a callback to DM to lock and notify DC for idle optimization exit.
It can't be DC directly because of a potential race condition with the
link protection thread and the rest of DM operation.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Alex Hung <alex.hung@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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Nicholas Kazlauskas 2024-02-12 16:51:59 -05:00 • committed by Greg Kroah-Hartman

parent df8eaae038

commit ffabdc44b5

2 changed files with 18 additions and 0 deletions

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10

drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c

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8

drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h

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