ASoC: dapm - Add methods to retrieve snd_card and soc_card from dapm context.

In preparation for ASoC Dynamic PCM (AKA DSP) support.

Provide convenience methods to retrieve the soc_card or snd_card from a
DAPM context.

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index fbfcda062839..7e15914b3633 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -124,6 +124,36 @@ static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
         return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
 }
 
+/* get snd_card from DAPM context */
+static inline struct snd_card *dapm_get_snd_card(
+        struct snd_soc_dapm_context *dapm)
+{
+        if (dapm->codec)
+                return dapm->codec->card->snd_card;
+        else if (dapm->platform)
+                return dapm->platform->card->snd_card;
+        else
+                BUG();
+
+        /* unreachable */
+        return NULL;
+}
+
+/* get soc_card from DAPM context */
+static inline struct snd_soc_card *dapm_get_soc_card(
+                struct snd_soc_dapm_context *dapm)
+{
+        if (dapm->codec)
+                return dapm->codec->card;
+        else if (dapm->platform)
+                return dapm->platform->card;
+        else
+                BUG();
+
+        /* unreachable */
+        return NULL;
+}
+
 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
 {
         if (w->codec)