ASoC: dapm - add method to get AIF widget from stream

In preparation for ASoC DSP support.

Provide a method to get the AIF widget name from the stream name.

Signed-off-by: Liam Girdwood <lrg@ti.com>

2 files changed, 19 insertions, 0 deletions

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index c46e7d8..f37c293 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -348,6 +348,8 @@ int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm);
 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm);
 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
 			    const struct snd_soc_dapm_route *route, int num);
+const char *snd_soc_dapm_get_aif(struct snd_soc_dapm_context *dapm,
+		const char *stream_name, enum snd_soc_dapm_type type);
 
 /* dapm events */
 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index f031764..7e05c6b 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -1884,6 +1884,23 @@ int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
 
+const char *snd_soc_dapm_get_aif(struct snd_soc_dapm_context *dapm,
+		const char *stream_name, enum snd_soc_dapm_type type)
+{
+	struct snd_soc_dapm_widget *w;
+
+	list_for_each_entry(w, &dapm->widgets, list) {
+
+		if (!w->sname)
+			continue;
+
+		if (w->id == type && strstr(w->sname, stream_name))
+			return w->name;
+	}
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_get_aif);
+
 /**
  * snd_soc_dapm_get_volsw - dapm mixer get callback
  * @kcontrol: mixer control