drm/nve0/fifo: use runlist event instead of polling

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c

@@ -118,7 +118,9 @@ nve0_fifo_runlist_update(struct nve0_fifo_priv *priv, u32 engine)
 	nv_wr32(priv, 0x002270, cur->addr >> 12);
 	nv_wr32(priv, 0x002274, (engine << 20) | (p >> 3));
 
-	if (!nv_wait(priv, 0x002284 + (engine * 8), 0x00100000, 0x00000000))
+	if (wait_event_timeout(engn->wait, !(nv_rd32(priv, 0x002284 +
+			       (engine * 0x08)) & 0x00100000),
+				msecs_to_jiffies(2000)) == 0)
 		nv_error(priv, "runlist %d update timeout\n", engine);
 	mutex_unlock(&nv_subdev(priv)->mutex);
 }