ASoC: soc-core: support snd_soc_dai_link_component for aux_dev

To find aux_dev, ASoC is using .name, codec_name, codec_of_node.
Here, .name is used to fallback in case of no codec.

But, we already have this kind of component finding method by
snd_soc_dai_link_component and soc_find_component().
We shouldn't have duplicated implementation to do same things.
This patch adds snd_soc_dai_link_component support to finding aux_dev.

Now, no driver is using only .name.
All drivers are using codec_name and/or codec_of_node.
This means no driver is finding component from .name so far.
(Actually almost all drivers are using .name as just "device name",
 not for finding component...)

This patch
1) add snd_soc_dai_link_component support for aux_dev. legacy style will
   be removed if all drivers are switched to new style.
2) try to find component via snd_soc_dai_link_component.
   Then, it doesn't try to find via .name, because no driver is using
   it so far.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87y3046wcf.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -941,6 +941,7 @@ struct snd_soc_dai_link {
 #define COMP_CPU(_dai)			{ .dai_name = _dai, }
 #define COMP_CODEC(_name, _dai)		{ .name = _name, .dai_name = _dai, }
 #define COMP_PLATFORM(_name)		{ .name = _name }
+#define COMP_AUX(_name)			{ .name = _name }
 #define COMP_DUMMY()			{ .name = "snd-soc-dummy", .dai_name = "snd-soc-dummy-dai", }
 
 extern struct snd_soc_dai_link_component null_dailink_component[0];
@@ -971,6 +972,12 @@ struct snd_soc_aux_dev {
 	const char *codec_name;
 	struct device_node *codec_of_node;
 
+	/*
+	 * name, codec_name, codec_of_node will be replaced
+	 * into dlc. don't use both in the same time
+	 */
+	struct snd_soc_dai_link_component dlc;
+
 	/* codec/machine specific init - e.g. add machine controls */
 	int (*init)(struct snd_soc_component *component);
 };

sound/soc/soc-core.c

@@ -1537,38 +1537,22 @@ static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
 {
 	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
 	struct snd_soc_component *component;
-	struct snd_soc_dai_link_component dlc;
 
-	if (aux_dev->codec_of_node || aux_dev->codec_name) {
+	/* remove me */
+	if (aux_dev->codec_name)
+		aux_dev->dlc.name = aux_dev->codec_name;
+	if (aux_dev->codec_of_node)
+		aux_dev->dlc.of_node = aux_dev->codec_of_node;
+
 	/* codecs, usually analog devices */
-		dlc.name = aux_dev->codec_name;
-		dlc.of_node = aux_dev->codec_of_node;
-		component = soc_find_component(&dlc);
-		if (!component) {
-			if (dlc.of_node)
-				dlc.name = of_node_full_name(dlc.of_node);
-			goto err_defer;
-		}
-	} else if (aux_dev->name) {
-		/* generic components */
-		dlc.name = aux_dev->name;
-		dlc.of_node = NULL;
-		component = soc_find_component(&dlc);
+	component = soc_find_component(&aux_dev->dlc);
 	if (!component)
-			goto err_defer;
-	} else {
-		dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
-		return -EINVAL;
-	}
+		return -EPROBE_DEFER;
 
 	component->init = aux_dev->init;
 	list_add(&component->card_aux_list, &card->aux_comp_list);
 
 	return 0;
-
-err_defer:
-	dev_err(card->dev, "ASoC: %s not registered\n", dlc.name);
-	return -EPROBE_DEFER;
 }
 
 static int soc_probe_aux_devices(struct snd_soc_card *card)