drm/amd/display: Remove redundant idle optimization check

[Why]
Disable idle optimization for each atomic commit is unnecessary,
and can lead to a potential race condition.

[How]
Remove idle optimization check from amdgpu_dm_atomic_commit_tail()

Fixes: 196107e ("drm/amd/display: Add IPS checks before dcn register access")
Cc: [email protected]
Reviewed-by: Hamza Mahfooz <[email protected]>
Acked-by: Roman Li <[email protected]>
Signed-off-by: Roman Li <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Roman Li

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -9169,9 +9169,6 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 
 	trace_amdgpu_dm_atomic_commit_tail_begin(state);
 
-	if (dm->dc->caps.ips_support && dm->dc->idle_optimizations_allowed)
-		dc_allow_idle_optimizations(dm->dc, false);
-
 	drm_atomic_helper_update_legacy_modeset_state(dev, state);
 	drm_dp_mst_atomic_wait_for_dependencies(state);