drm/amd/display: Forward periodic ABM keep-alive scenario to DMU

[Why & How]
1. The periodic ABM full-frame update for VESA PR is now owned
   by the DMU timer.
2. In PR_update_state, compute whether the current scenario allows
   the periodic keep-alive (not CTS, not front-buffer rendering,
   not force-full-frame, content actively updating) and forward it
   via the abm_periodic_ffu_allowed runtime flag only when it changes.

Reviewed-by: Robin Chen <robin.chen@amd.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Leon Huang <Leon.Huang1@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Huang, Leon 2026-09-02 23:02:50 +08:00 • committed by Alex Deucher
commit 258403174d