- switch (overlay->hw_wedged) {
- case RELEASE_OLD_VID:
- obj = &overlay->old_vid_bo->base;
- i915_gem_object_unpin(obj);
- drm_gem_object_unreference(obj);
- overlay->old_vid_bo = NULL;
- break;
- case SWITCH_OFF_STAGE_1:
- flip_addr = overlay->flip_addr;
- flip_addr |= OFC_UPDATE;
-
- overlay->hw_wedged = SWITCH_OFF_STAGE_2;
-
- BEGIN_LP_RING(4);
- OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
- OUT_RING(flip_addr);
- OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
- OUT_RING(MI_NOOP);
- ADVANCE_LP_RING();
-
- overlay->last_flip_req = i915_add_request(dev, NULL,
- 0, &dev_priv->render_ring);
- if (overlay->last_flip_req == 0)
- return -ENOMEM;
-
- ret = i915_do_wait_request(dev, overlay->last_flip_req,
- interruptible, &dev_priv->render_ring);
- if (ret != 0)
- return ret;
-
- case SWITCH_OFF_STAGE_2:
- intel_overlay_off_tail(overlay);
- break;
- default:
- BUG_ON(overlay->hw_wedged != NEEDS_WAIT_FOR_FLIP);
- }