ASoC: simple-card-utils: add asoc_simple_card_canonicalize_cpu()

simple-card needs remove dai_link->cpu_dai_name if it CPU was
single DAI.
This patch makes this method simple style standard.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 19 insertions, 0 deletions

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index a71d46a95ca8..f760f559393e 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -62,5 +62,7 @@ int asoc_simple_card_init_dai(struct snd_soc_dai *dai,
                               struct asoc_simple_dai *simple_dai);
 
 int asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link);
+void asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
+                                      int is_single_links);
 
 #endif /* __SIMPLE_CARD_CORE_H */
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 189eadddfad3..c5d32dad48b2 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -206,6 +206,23 @@ int asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link)
 }
 EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_dailink);
 
+void asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
+                                       int is_single_links)
+{
+        /*
+         * In soc_bind_dai_link() will check cpu name after
+         * of_node matching if dai_link has cpu_dai_name.
+         * but, it will never match if name was created by
+         * fmt_single_name() remove cpu_dai_name if cpu_args
+         * was 0. See:
+         *      fmt_single_name()
+         *      fmt_multiple_name()
+         */
+        if (is_single_links)
+                dai_link->cpu_dai_name = NULL;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_cpu);
+
 /* Module information */
 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");