drm/atomic: Set all the changed flags in one place.

Now that handle_conflicting_encoders cannot disable crtc's any more
it makes sense to set all the changed flags in 1 place.
This makes the code slightly less magical.

The (now removed) comment is out of date. The only reason the
active_changed was set late was because handle_conflicting_encoders
could disable connectors. This is no longer the case,
and we can put everything in 1 place.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1491477543-31257-3-git-send-email-maarten.lankhorst@linux.intel.com

drivers/gpu/drm/drm_atomic_helper.c

@@ -515,6 +515,12 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 			new_crtc_state->mode_changed = true;
 			new_crtc_state->connectors_changed = true;
 		}
+
+		if (old_crtc_state->active != new_crtc_state->active) {
+			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n",
+					 crtc->base.id, crtc->name);
+			new_crtc_state->active_changed = true;
+		}
 	}
 
 	ret = handle_conflicting_encoders(state, false);
@@ -551,17 +557,6 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 		bool has_connectors =
 			!!new_crtc_state->connector_mask;
 
-		/*
-		 * We must set ->active_changed after walking connectors for
-		 * otherwise an update that only changes active would result in
-		 * a full modeset because update_connector_routing force that.
-		 */
-		if (old_crtc_state->active != new_crtc_state->active) {
-			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n",
-					 crtc->base.id, crtc->name);
-			new_crtc_state->active_changed = true;
-		}
-
 		if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
 			continue;