Merge tag 'drm-misc-fixes-2017-12-07' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

regression fix for vc4 + rpm stable fix for analogix bridge

* tag 'drm-misc-fixes-2017-12-07' of git://anongit.freedesktop.org/drm/drm-misc:
  drm/bridge: analogix dp: Fix runtime PM state in get_modes() callback
  drm/vc4: Fix false positive WARN() backtrace on refcount_inc() usage

Author: airlied

drivers/gpu/drm/bridge/analogix/analogix_dp_core.c

@@ -946,7 +946,9 @@ static int analogix_dp_get_modes(struct drm_connector *connector)
 			return 0;
 		}
 
+		pm_runtime_get_sync(dp->dev);
 		edid = drm_get_edid(connector, &dp->aux.ddc);
+		pm_runtime_put(dp->dev);
 		if (edid) {
 			drm_mode_connector_update_edid_property(&dp->connector,
 								edid);

drivers/gpu/drm/vc4/vc4_bo.c

@@ -637,7 +637,8 @@ int vc4_bo_inc_usecnt(struct vc4_bo *bo)
 	mutex_lock(&bo->madv_lock);
 	switch (bo->madv) {
 	case VC4_MADV_WILLNEED:
-		refcount_inc(&bo->usecnt);
+		if (!refcount_inc_not_zero(&bo->usecnt))
+			refcount_set(&bo->usecnt, 1);
 		ret = 0;
 		break;
 	case VC4_MADV_DONTNEED: