ASoC: soc-dai.c: add DAI get/match functions

Current ASoC is specifying and checking DAI name.
But where it came from and how to check was ambiguous.
This patch adds snd_soc_dai_name_get() / snd_soc_dlc_dai_is_match()
and makes it clear.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87h6qco952.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index e3906ec..a453804 100644 (file)
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -271,6 +271,8 @@ int snd_soc_dai_compr_get_metadata(struct snd_soc_dai *dai,
                                   struct snd_compr_stream *cstream,
                                   struct snd_compr_metadata *metadata);
 
+const char *snd_soc_dai_name_get(struct snd_soc_dai *dai);
+
 struct snd_soc_dai_ops {
        /*
         * DAI clocking configuration, all optional.

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 94e856d..ee309d3 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -253,6 +253,47 @@ static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dl
        return !dlc->dai_name;
 }
 
+static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
+                                  struct snd_soc_dai *dai)
+{
+       if (!dlc)
+               return 0;
+
+       if (!dlc->dai_name)
+               return 1;
+
+       /* see snd_soc_dai_name_get() */
+
+       if (strcmp(dlc->dai_name, dai->name) == 0)
+               return 1;
+
+       if (dai->driver->name &&
+           strcmp(dai->driver->name, dlc->dai_name) == 0)
+               return 1;
+
+       if (dai->component->name &&
+           strcmp(dlc->dai_name, dai->component->name) == 0)
+               return 1;
+
+       return 0;
+}
+
+const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
+{
+       /* see snd_soc_is_matching_dai() */
+       if (dai->name)
+               return dai->name;
+
+       if (dai->driver->name)
+               return dai->driver->name;
+
+       if (dai->component->name)
+               return dai->component->name;
+
+       return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
+
 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
                                     struct snd_soc_component *component)
 {
@@ -810,18 +851,11 @@ struct snd_soc_dai *snd_soc_find_dai(
        lockdep_assert_held(&client_mutex);
 
        /* Find CPU DAI from registered DAIs */
-       for_each_component(component) {
-               if (!snd_soc_is_matching_component(dlc, component))
-                       continue;
-               for_each_component_dais(component, dai) {
-                       if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
-                           && (!dai->driver->name
-                               || strcmp(dai->driver->name, dlc->dai_name)))
-                               continue;
-
-                       return dai;
-               }
-       }
+       for_each_component(component)
+               if (snd_soc_is_matching_component(dlc, component))
+                       for_each_component_dais(component, dai)
+                               if (snd_soc_is_matching_dai(dlc, dai))
+                                       return dai;
 
        return NULL;
 }
@@ -3316,9 +3350,7 @@ int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_
                                id--;
                        }
 
-                       dlc->dai_name   = dai->driver->name;
-                       if (!dlc->dai_name)
-                               dlc->dai_name = pos->name;
+                       dlc->dai_name   = snd_soc_dai_name_get(dai);
                } else if (ret) {
                        /*
                         * if another error than ENOTSUPP is returned go on and