[alsa-devel] [PATCH 11/13] topology: Parse and build private data of physical links

[mengdong.lin at linux.intel.com]

From: Mengdong Lin <mengdong.lin at linux.intel.com>

Users can define private data for physical links by C API or text conf
file. Private data pointer is added to C API template for physical links.

Signed-off-by: Mengdong Lin <mengdong.lin at linux.intel.com>

diff --git a/include/topology.h b/include/topology.h
index 3692da4..ad84c15 100644
--- a/include/topology.h
+++ b/include/topology.h
@@ -996,6 +996,7 @@ struct snd_tplg_link_template {
 
 	unsigned int flag_mask;         /* bitmask of flags to configure */
 	unsigned int flags;             /* SND_SOC_TPLG_LNK_FLGBIT_* flag value */
+	struct snd_soc_tplg_private *priv; /*!< private data */
 };
 
 /** \struct snd_tplg_obj_template
diff --git a/src/topology/pcm.c b/src/topology/pcm.c
index a751851..1d70396 100644
--- a/src/topology/pcm.c
+++ b/src/topology/pcm.c
@@ -162,7 +162,7 @@ static int build_link(snd_tplg_t *tplg, struct tplg_elem *elem)
 	if (err < 0)
 		return err;
 
-	/* hw configs */
+	/* hw configs & private data */
 	base = &elem->ref_list;
 	list_for_each(pos, base) {
 
@@ -185,6 +185,12 @@ static int build_link(snd_tplg_t *tplg, struct tplg_elem *elem)
 			num_hw_configs++;
 			break;
 
+		case SND_TPLG_TYPE_DATA: /* merge private data */
+			err = tplg_copy_data(tplg, elem, ref);
+			if (err < 0)
+				return err;
+			break;
+
 		default:
 			break;
 		}
@@ -1043,5 +1049,24 @@ int tplg_add_link_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)
 	/* flags */
 	link->flag_mask = link_tpl->flag_mask;
 	link->flags = link_tpl->flags;
+
+	/* private data */
+	if (link_tpl->priv != NULL && link_tpl->priv->size) {
+		_link = realloc(link,
+			elem->size + link_tpl->priv->size);
+		if (!_link) {
+			tplg_elem_free(elem);
+			return -ENOMEM;
+		}
+
+		link = _link;
+		elem->link = link;
+		elem->size += link_tpl->priv->size;
+
+		memcpy(link->priv.data, link_tpl->priv->data,
+			link_tpl->priv->size);
+		link->priv.size = link_tpl->priv->size;
+	}
+
 	return 0;
 }
-- 
2.7.4