staging: greybus: audio: Maintain jack list within GB Audio module

As per the current implementation for GB codec driver, a jack list is
maintained for each module. And it expects the list to be populated by
the snd_soc_jack structure which would require modifications in
mainstream code.

However, this is not a necessary requirement and the list can be easily
maintained within gbaudio_module_info as well. This patch provides the
relevant changes for the same.
Signed-off-by: Vaibhav Agarwal <vaibhav.sr@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/4ee030af7a8e203f89a6e513313e36f4e2991e5b.1594290158.git.vaibhav.sr@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/audio_codec.c

@@ -712,6 +712,7 @@ static int gbaudio_init_jack(struct gbaudio_module_info *module,
 			     struct snd_soc_card *card)
 {
 	int ret;
+	struct gbaudio_jack *jack, *n;
 	struct snd_soc_jack_pin *headset, *button;
 
 	if (!module->jack_mask)
@@ -726,14 +727,16 @@ static int gbaudio_init_jack(struct gbaudio_module_info *module,
 
 	headset->pin = module->jack_name;
 	headset->mask = module->jack_mask;
-
 	ret = snd_soc_card_jack_new(card, module->jack_name, module->jack_mask,
-				    &module->headset_jack, headset, 1);
+				    &module->headset.jack, headset, 1);
 	if (ret) {
 		dev_err(module->dev, "Failed to create new jack\n");
 		return ret;
 	}
 
+	/* Add to module's jack list */
+	list_add(&module->headset.list, &module->jack_list);
+
 	if (!module->button_mask)
 		return 0;
 
@@ -742,20 +745,22 @@ static int gbaudio_init_jack(struct gbaudio_module_info *module,
 	button = devm_kzalloc(module->dev, sizeof(*button), GFP_KERNEL);
 	if (!button) {
 		ret = -ENOMEM;
-		goto free_headset;
+		goto free_jacks;
 	}
 
 	button->pin = module->button_name;
 	button->mask = module->button_mask;
-
 	ret = snd_soc_card_jack_new(card, module->button_name,
-				    module->button_mask, &module->button_jack,
+				    module->button_mask, &module->button.jack,
 				    button, 1);
 	if (ret) {
 		dev_err(module->dev, "Failed to create button jack\n");
-		goto free_headset;
+		goto free_jacks;
 	}
 
+	/* Add to module's jack list */
+	list_add(&module->button.list, &module->jack_list);
+
 	/*
 	 * Currently, max 4 buttons are supported with following key mapping
 	 * BTN_0 = KEY_MEDIA
@@ -765,56 +770,54 @@ static int gbaudio_init_jack(struct gbaudio_module_info *module,
 	 */
 
 	if (module->button_mask & SND_JACK_BTN_0) {
-		ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_0,
+		ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_0,
 				       KEY_MEDIA);
 		if (ret) {
 			dev_err(module->dev, "Failed to set BTN_0\n");
-			goto free_button;
+			goto free_jacks;
 		}
 	}
 
 	if (module->button_mask & SND_JACK_BTN_1) {
-		ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_1,
+		ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_1,
 				       KEY_VOICECOMMAND);
 		if (ret) {
 			dev_err(module->dev, "Failed to set BTN_1\n");
-			goto free_button;
+			goto free_jacks;
 		}
 	}
 
 	if (module->button_mask & SND_JACK_BTN_2) {
-		ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_2,
+		ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_2,
 				       KEY_VOLUMEUP);
 		if (ret) {
 			dev_err(module->dev, "Failed to set BTN_2\n");
-			goto free_button;
+			goto free_jacks;
 		}
 	}
 
 	if (module->button_mask & SND_JACK_BTN_3) {
-		ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_3,
+		ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_3,
 				       KEY_VOLUMEDOWN);
 		if (ret) {
 			dev_err(module->dev, "Failed to set BTN_0\n");
-			goto free_button;
+			goto free_jacks;
 		}
 	}
 
 	/* FIXME
 	 * verify if this is really required
 	set_bit(INPUT_PROP_NO_DUMMY_RELEASE,
-		module->button_jack.jack->input_dev->propbit);
+		module->button.jack.jack->input_dev->propbit);
 	*/
 
 	return 0;
 
-free_button:
-	snd_device_free(card->snd_card, module->button_jack.jack);
-	list_del(&module->button_jack.list);
-
-free_headset:
-	snd_device_free(card->snd_card, module->headset_jack.jack);
-	list_del(&module->headset_jack.list);
+free_jacks:
+	list_for_each_entry_safe(jack, n, &module->jack_list, list) {
+		snd_device_free(card->snd_card, jack->jack.jack);
+		list_del(&jack->list);
+	}
 
 	return ret;
 }
@@ -824,7 +827,7 @@ int gbaudio_register_module(struct gbaudio_module_info *module)
 	int ret;
 	struct snd_soc_codec *codec;
 	struct snd_card *card;
-	struct snd_soc_jack *jack = NULL;
+	struct gbaudio_jack *jack = NULL;
 
 	if (!gbcodec) {
 		dev_err(module->dev, "GB Codec not yet probed\n");
@@ -869,11 +872,9 @@ int gbaudio_register_module(struct gbaudio_module_info *module)
 		 * 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))
+		list_for_each_entry(jack, &module->jack_list, list) {
 			snd_device_register(codec->card->snd_card,
-						    jack->jack);
+					    jack->jack.jack);
 		}
 #endif
 	}
@@ -957,7 +958,7 @@ void gbaudio_unregister_module(struct gbaudio_module_info *module)
 {
 	struct snd_soc_codec *codec = gbcodec->codec;
 	struct snd_card *card = codec->card->snd_card;
-	struct snd_soc_jack *jack, *next_j;
+	struct gbaudio_jack *jack, *n;
 	int mask;
 
 	dev_dbg(codec->dev, "Unregister %s module\n", module->name);
@@ -970,20 +971,19 @@ void gbaudio_unregister_module(struct gbaudio_module_info *module)
 	mutex_unlock(&gbcodec->lock);
 
 #ifdef CONFIG_SND_JACK
-	/* free jack devices for this module from codec->jack_list */
-	list_for_each_entry_safe(jack, next_j, &component->card->jack_list,
-				 list) {
-		if (jack == &module->headset_jack)
+	/* free jack devices for this module jack_list */
+	list_for_each_entry_safe(jack, n, &module->jack_list, list) {
+		if (jack == &module->headset)
 			mask = GBCODEC_JACK_MASK;
-		else if (jack == &module->button_jack)
+		else if (jack == &module->button)
 			mask = GBCODEC_JACK_BUTTON_MASK;
 		else
 			mask = 0;
 		if (mask) {
 			dev_dbg(module->dev, "Report %s removal\n",
-				jack->jack->id);
-			snd_soc_jack_report(jack, 0, mask);
-			snd_device_free(codec->card->snd_card, jack->jack);
+				jack->jack.jack->id);
+			snd_soc_jack_report(&jack->jack, 0, mask);
+			snd_device_free(codec->card->snd_card, jack->jack.jack);
 			list_del(&jack->list);
 		}
 	}

drivers/staging/greybus/audio_codec.h

@@ -106,6 +106,11 @@ enum gbaudio_module_state {
 	GBAUDIO_MODULE_ON,
 };
 
+struct gbaudio_jack {
+	struct snd_soc_jack jack;
+	struct list_head list;
+};
+
 struct gbaudio_module_info {
 	/* module info */
 	struct device *dev;
@@ -130,8 +135,8 @@ struct gbaudio_module_info {
 	int jack_mask;
 	int button_mask;
 	int button_status;
-	struct snd_soc_jack headset_jack;
-	struct snd_soc_jack button_jack;
+	struct gbaudio_jack headset;
+	struct gbaudio_jack button;
 
 	/* connection info */
 	struct gb_connection *mgmt_connection;
@@ -155,6 +160,7 @@ struct gbaudio_module_info {
 	struct list_head widget_list;
 	struct list_head ctl_list;
 	struct list_head widget_ctl_list;
+	struct list_head jack_list;
 
 	struct gb_audio_topology *topology;
 };

drivers/staging/greybus/audio_module.c

@@ -21,8 +21,8 @@ static int gbaudio_request_jack(struct gbaudio_module_info *module,
 				struct gb_audio_jack_event_request *req)
 {
 	int report;
-	struct snd_jack *jack = module->headset_jack.jack;
-	struct snd_jack *btn_jack = module->button_jack.jack;
+	struct snd_jack *jack = module->headset.jack.jack;
+	struct snd_jack *btn_jack = module->button.jack.jack;
 
 	if (!jack) {
 		dev_err_ratelimited(module->dev,
@@ -38,11 +38,11 @@ static int gbaudio_request_jack(struct gbaudio_module_info *module,
 	if (req->event == GB_AUDIO_JACK_EVENT_REMOVAL) {
 		module->jack_type = 0;
 		if (btn_jack && module->button_status) {
-			snd_soc_jack_report(&module->button_jack, 0,
+			snd_soc_jack_report(&module->button.jack, 0,
 					    module->button_mask);
 			module->button_status = 0;
 		}
-		snd_soc_jack_report(&module->headset_jack, 0,
+		snd_soc_jack_report(&module->headset.jack, 0,
 				    module->jack_mask);
 		return 0;
 	}
@@ -61,7 +61,7 @@ static int gbaudio_request_jack(struct gbaudio_module_info *module,
 				     module->jack_type, report);
 
 	module->jack_type = report;
-	snd_soc_jack_report(&module->headset_jack, report, module->jack_mask);
+	snd_soc_jack_report(&module->headset.jack, report, module->jack_mask);
 
 	return 0;
 }
@@ -70,7 +70,7 @@ static int gbaudio_request_button(struct gbaudio_module_info *module,
 				  struct gb_audio_button_event_request *req)
 {
 	int soc_button_id, report;
-	struct snd_jack *btn_jack = module->button_jack.jack;
+	struct snd_jack *btn_jack = module->button.jack.jack;
 
 	if (!btn_jack) {
 		dev_err_ratelimited(module->dev,
@@ -124,7 +124,7 @@ static int gbaudio_request_button(struct gbaudio_module_info *module,
 
 	module->button_status = report;
 
-	snd_soc_jack_report(&module->button_jack, report, module->button_mask);
+	snd_soc_jack_report(&module->button.jack, report, module->button_mask);
 
 	return 0;
 }
@@ -258,6 +258,7 @@ static int gb_audio_probe(struct gb_bundle *bundle,
 	INIT_LIST_HEAD(&gbmodule->widget_list);
 	INIT_LIST_HEAD(&gbmodule->ctl_list);
 	INIT_LIST_HEAD(&gbmodule->widget_ctl_list);
+	INIT_LIST_HEAD(&gbmodule->jack_list);
 	gbmodule->dev = dev;
 	snprintf(gbmodule->name, NAME_SIZE, "%s.%s", dev->driver->name,
 		 dev_name(dev));