+static bool framebuffer_changed(struct drm_device *dev,
+ struct drm_atomic_state *old_state,
+ struct drm_crtc *crtc)
+{
+ struct drm_plane *plane;
+ struct drm_plane_state *old_plane_state;
+ int nplanes = old_state->dev->mode_config.num_total_plane;
+ int i;
+
+ for (i = 0; i < nplanes; i++) {
+ plane = old_state->planes[i];
+ old_plane_state = old_state->plane_states[i];
+
+ if (!plane)
+ continue;
+
+ if (plane->state->crtc != crtc &&
+ old_plane_state->crtc != crtc)
+ continue;
+
+ if (plane->state->fb != old_plane_state->fb)
+ return true;
+ }
+
+ return false;
+}
+