drm/vc4: Do not include writeback conn load in load tracker

The transposer/writeback connector should be running with a
lower priority, so shouldn't be factored into the load
calculations.

Signed-off-by: Dave Stevenson <[email protected]>

Author: 6by9

drivers/gpu/drm/vc4/vc4_kms.c

@@ -660,17 +660,26 @@ static int vc4_load_tracker_atomic_check(struct drm_atomic_state *state)
 	for_each_oldnew_plane_in_state(state, plane, old_plane_state,
 				       new_plane_state, i) {
 		struct vc4_plane_state *vc4_plane_state;
+		struct vc4_crtc *vc4_crtc;
 
 		if (old_plane_state->fb && old_plane_state->crtc) {
 			vc4_plane_state = to_vc4_plane_state(old_plane_state);
-			load_state->membus_load -= vc4_plane_state->membus_load;
-			load_state->hvs_load -= vc4_plane_state->hvs_load;
+			vc4_crtc = to_vc4_crtc(old_plane_state->crtc);
+
+			if (!vc4_crtc->feeds_txp) {
+				load_state->membus_load -= vc4_plane_state->membus_load;
+				load_state->hvs_load -= vc4_plane_state->hvs_load;
+			}
 		}
 
 		if (new_plane_state->fb && new_plane_state->crtc) {
 			vc4_plane_state = to_vc4_plane_state(new_plane_state);
-			load_state->membus_load += vc4_plane_state->membus_load;
-			load_state->hvs_load += vc4_plane_state->hvs_load;
+			vc4_crtc = to_vc4_crtc(new_plane_state->crtc);
+
+			if (!vc4_crtc->feeds_txp) {
+				load_state->membus_load += vc4_plane_state->membus_load;
+				load_state->hvs_load += vc4_plane_state->hvs_load;
+			}
 		}
 	}