drm/atomic: Don't fixup modes that haven't been reset

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 134d300..1721446 100644 (file)
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -430,6 +430,11 @@ mode_fixup(struct drm_atomic_state *state)
                new_crtc_state =
                        drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
 
+               if (!new_crtc_state->mode_changed &&
+                   !new_crtc_state->connectors_changed) {
+                       continue;
+               }
+
                /*
                 * Each encoder has at most one connector (since we always steal
                 * it away), so we won't call ->mode_fixup twice.