ASoC: soc-core.c: add snd_soc_copy_dai_args()

To use multi Component support, we need to check dai_args whether
Card could get DAI from args (CPU/Codec needs set dai_args on DAI driver).
If it could, we need to allocate dai_args for dlc.
This patch adds snd_soc_copy_dai_args() for it.

This is helper function for multi Component support.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87bkgko94e.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -1338,6 +1338,8 @@ void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
 
 void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
 				     struct snd_soc_dai_link_component *cpus);
+struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev,
+					      struct of_phandle_args *args);
 struct snd_soc_dai *snd_soc_get_dai_via_args(struct of_phandle_args *dai_args);
 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
 					 struct snd_soc_dai_driver *dai_drv,

sound/soc/soc-core.c

@@ -809,6 +809,19 @@ static struct device_node
 	return of_node;
 }
 
+struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev, struct of_phandle_args *args)
+{
+	struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
+
+	if (!ret)
+		return NULL;
+
+	*ret = *args;
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
+
 static int snd_soc_is_matching_component(
 	const struct snd_soc_dai_link_component *dlc,
 	struct snd_soc_component *component)