drm/amd/display: Change optimized_required logic

Rather than setting it every time there's a full update with surface
count > 0, set it when we need to do plane_atomic_disconnect. Also make
sure that we unset the flag in plane_atomic_disable, so that in the
event we run through a sequence where we do disconnect followed by an
immediate disable, we do not do unnecessarily request a passive flip to
do the optimization.
Signed-off-by: Andrew Jiang <Andrew.Jiang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -594,6 +594,8 @@ static void plane_atomic_disconnect(struct dc *dc, struct pipe_ctx *pipe_ctx)
 	mpc->funcs->remove_mpcc(mpc, mpc_tree_params, mpcc_to_remove);
 	dc->res_pool->opps[opp_id]->mpcc_disconnect_pending[fe_idx] = true;
 
+	dc->optimized_required = true;
+
 	if (hubp->funcs->hubp_disconnect)
 		hubp->funcs->hubp_disconnect(hubp);
 
@@ -641,6 +643,7 @@ static void plane_atomic_disable(struct dc *dc, struct pipe_ctx *pipe_ctx)
 				OPP_PIPE_CLOCK_EN, 0);
 
 	hubp->power_gated = true;
+	dc->optimized_required = false; /* We're powering off, no need to optimize */
 
 	plane_atomic_power_down(dc, fe_idx);