ASoC: soc-core: add snd_soc_is_matching_component()

To find (CPU/)Codec/Platform, we need to find component first
(= on CPU/Codec/Platform), and find DAI from it (= CPU/Codec).
These are similar operation but difficult to be simple,
and has many duplicate code to finding component.
This patch adds new snd_soc_is_matching_component(),
and reduce duplicate codes.

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

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index d856b08..da2b2a7 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -737,6 +737,24 @@ static struct snd_soc_component *soc_find_component(
        return NULL;
 }
 
+static int snd_soc_is_matching_component(
+       const struct snd_soc_dai_link_component *dlc,
+       struct snd_soc_component *component)
+{
+       struct device_node *component_of_node;
+
+       component_of_node = component->dev->of_node;
+       if (!component_of_node && component->dev->parent)
+               component_of_node = component->dev->parent->of_node;
+
+       if (dlc->of_node && component_of_node != dlc->of_node)
+               return 0;
+       if (dlc->name && strcmp(component->name, dlc->name))
+               return 0;
+
+       return 1;
+}
+
 /**
  * snd_soc_find_dai - Find a registered DAI
  *
@@ -753,19 +771,12 @@ struct snd_soc_dai *snd_soc_find_dai(
 {
        struct snd_soc_component *component;
        struct snd_soc_dai *dai;
-       struct device_node *component_of_node;
 
        lockdep_assert_held(&client_mutex);
 
        /* Find CPU DAI from registered DAIs*/
        list_for_each_entry(component, &component_list, list) {
-               component_of_node = component->dev->of_node;
-               if (!component_of_node && component->dev->parent)
-                       component_of_node = component->dev->parent->of_node;
-
-               if (dlc->of_node && component_of_node != dlc->of_node)
-                       continue;
-               if (dlc->name && strcmp(component->name, dlc->name))
+               if (!snd_soc_is_matching_component(dlc, component))
                        continue;
                list_for_each_entry(dai, &component->dai_list, list) {
                        if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
@@ -844,7 +855,6 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
        struct snd_soc_dai_link_component cpu_dai_component;
        struct snd_soc_component *component;
        struct snd_soc_dai **codec_dais;
-       struct device_node *platform_of_node;
        int i;
 
        if (dai_link->ignore)
@@ -893,17 +903,9 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
 
        /* find one from the set of registered platforms */
        list_for_each_entry(component, &component_list, list) {
-               platform_of_node = component->dev->of_node;
-               if (!platform_of_node && component->dev->parent->of_node)
-                       platform_of_node = component->dev->parent->of_node;
-
-               if (dai_link->platform->of_node) {
-                       if (platform_of_node != dai_link->platform->of_node)
-                               continue;
-               } else {
-                       if (strcmp(component->name, dai_link->platform->name))
-                               continue;
-               }
+               if (!snd_soc_is_matching_component(dai_link->platform,
+                                                  component))
+                       continue;
 
                snd_soc_rtdcom_add(rtd, component);
        }