greybus: audio: Reorganize sequence in GB audio bundle & codec driver

Modify sequence of register_module & unregister_module in bundle
driver. This would affect the uevent generated for above user
space. Accordingly, we need to modify snd_soc_xxx sequence in
register_module() in codec driver.
Signed-off-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/audio_codec.c

@@ -963,27 +963,27 @@ int gbaudio_register_module(struct gbaudio_module_info *module)
 
 	/* card already instantiated, create widgets here only */
 	if (codec->card->instantiated) {
-		ret = snd_soc_dapm_new_widgets(&codec->dapm);
-		if (!ret)
-			snd_soc_dapm_link_component_dai_widgets(codec->card,
-								&codec->dapm);
-	}
-
+		snd_soc_dapm_link_component_dai_widgets(codec->card,
+							&codec->dapm);
 #ifdef CONFIG_SND_JACK
-	/* register jack devices for this module from codec->jack_list */
-	list_for_each_entry(jack, &codec->jack_list, list) {
-		if ((jack == &module->headset_jack)
-		    || (jack == &module->button_jack))
-			snd_device_register(codec->card->snd_card, jack->jack);
-	}
+		/* register jack devices for this module from codec->jack_list */
+		list_for_each_entry(jack, &codec->jack_list, list) {
+			if ((jack == &module->headset_jack)
+			    || (jack == &module->button_jack))
+				snd_device_register(codec->card->snd_card,
+						    jack->jack);
+		}
 #endif
+	}
 
 	list_add(&module->list, &gbcodec->module_list);
+	if (codec->card->instantiated)
+		ret = snd_soc_dapm_new_widgets(&codec->dapm);
 	dev_dbg(codec->dev, "Registered %s module\n", module->name);
 
 	mutex_unlock(&gbcodec->lock);
 	up_write(&card->controls_rwsem);
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL(gbaudio_register_module);
 
@@ -1060,11 +1060,10 @@ void gbaudio_unregister_module(struct gbaudio_module_info *module)
 
 	dev_dbg(codec->dev, "Unregister %s module\n", module->name);
 
-	/* complete widget processing, if ongoing */
-	snd_soc_dapm_sync(&codec->dapm);
-
 	down_write(&card->controls_rwsem);
 	mutex_lock(&gbcodec->lock);
+	gbaudio_codec_cleanup(module);
+	list_del(&module->list);
 	dev_dbg(codec->dev, "Process Unregister %s module\n", module->name);
 
 #ifdef CONFIG_SND_JACK
@@ -1078,8 +1077,6 @@ void gbaudio_unregister_module(struct gbaudio_module_info *module)
 	}
 #endif
 
-	gbaudio_codec_cleanup(module);
-
 	if (module->dapm_routes) {
 		dev_dbg(codec->dev, "Removing %d routes\n",
 			module->num_dapm_routes);
@@ -1099,7 +1096,6 @@ void gbaudio_unregister_module(struct gbaudio_module_info *module)
 					   module->num_dapm_widgets);
 	}
 
-	list_del(&module->list);
 	dev_dbg(codec->dev, "Unregistered %s module\n", module->name);
 
 	mutex_unlock(&gbcodec->lock);

drivers/staging/greybus/audio_module.c

@@ -308,18 +308,22 @@ static int gb_audio_probe(struct gb_bundle *bundle,
 	}
 	gbmodule->topology = topology;
 
-	/* register module with gbcodec */
-	ret = gbaudio_register_module(gbmodule);
-	if (ret)
-		goto release_topology;
-
 	/* Initialize data connections */
 	list_for_each_entry(dai, &gbmodule->data_list, list) {
 		ret = gb_connection_enable(dai->connection);
-		if (ret)
+		if (ret) {
+			dev_err(dev,
+				"%d:Error while enabling %d:data connection\n",
+				ret, dai->data_cport);
 			goto disable_data_connection;
+		}
 	}
 
+	/* register module with gbcodec */
+	ret = gbaudio_register_module(gbmodule);
+	if (ret)
+		goto disable_data_connection;
+
 	/* inform above layer for uevent */
 	dev_dbg(dev, "Inform set_event:%d to above layer\n", 1);
 	/* prepare for the audio manager */
@@ -339,9 +343,6 @@ static int gb_audio_probe(struct gb_bundle *bundle,
 disable_data_connection:
 	list_for_each_entry_safe(dai, _dai, &gbmodule->data_list, list)
 		gb_connection_disable(dai->connection);
-	gbaudio_unregister_module(gbmodule);
-
-release_topology:
 	gbaudio_tplg_release(gbmodule);
 	gbmodule->topology = NULL;
 
@@ -371,11 +372,11 @@ static void gb_audio_disconnect(struct gb_bundle *bundle)
 	struct gbaudio_module_info *gbmodule = greybus_get_drvdata(bundle);
 	struct gbaudio_data_connection *dai, *_dai;
 
-	gbaudio_unregister_module(gbmodule);
 
 	/* inform uevent to above layers */
 	gb_audio_manager_remove(gbmodule->manager_id);
 
+	gbaudio_unregister_module(gbmodule);
 	gbaudio_tplg_release(gbmodule);
 	gbmodule->topology = NULL;
 	kfree(gbmodule->topology);