RD: test_ll_task: hack to allow access to DAI copier mutex

This is temporary and not needed anymore when DAI is also
created in user-space.

Author: kv2019i

src/audio/dai-zephyr.c

@@ -510,6 +510,7 @@ __cold int dai_common_new(struct dai_data *dd, struct comp_dev *dev,
 
 #ifdef CONFIG_SOF_USERSPACE_LL
 	dd->dai->lock = k_object_alloc(K_OBJ_MUTEX);
+	comp_set_drvdata(dev, dd);
 #else
 	dd->dai->lock = &dd->dai->lock_obj;
 #endif

zephyr/test/userspace/test_ll_task.c

@@ -446,6 +446,15 @@ static void pipeline_two_components(bool run_in_user)
 		user_grant_dma_access_all(&ppl_user_thread);
 		user_access_to_mailbox(zephyr_ll_mem_domain(), &ppl_user_thread);
 
+		/*
+		 * A hack for testing purposes, normally DAI module
+		 * is created in user-space so it gets access
+		 * automatically. Until that works, use dai_dd directly.
+		 */
+		struct dai_data *dai_dd = comp_get_drvdata(ctx->dai_comp);
+		struct k_mutex *dai_lock = dai_dd->dai->lock;
+		k_thread_access_grant(&ppl_user_thread, dai_lock);
+
 		k_thread_start(&ppl_user_thread);
 
 		LOG_INF("user thread started, waiting for completion");