topology: add support for pasring external ops in conf files

Parsing external ops was missing from the conf files but was in the
C API. Fix this now by making sure we also check for external ops.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

src/topology/ctl.c

@@ -393,6 +393,14 @@ int tplg_parse_control_bytes(snd_tplg_t *tplg,
 				return err;
 			continue;
 		}
+
+		if (strcmp(id, "extops") == 0) {
+			err = tplg_parse_compound(tplg, n, tplg_parse_ext_ops,
+				be);
+			if (err < 0)
+				return err;
+			continue;
+		}
 	}
 
 	return 0;

src/topology/ops.c

@@ -82,3 +82,41 @@ int tplg_parse_ops(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
 
 	return 0;
 }
+
+/* Parse External Control operations. Ops can come from standard names above or
+ * bespoke driver controls with numbers >= 256
+ */
+int tplg_parse_ext_ops(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
+	snd_config_t *cfg, void *private)
+{
+	snd_config_iterator_t i, next;
+	snd_config_t *n;
+	struct snd_soc_tplg_bytes_control *be = private;
+	const char *id, *value;
+
+	tplg_dbg("\tExt Ops\n");
+
+	snd_config_for_each(i, next, cfg) {
+
+		n = snd_config_iterator_entry(i);
+
+		/* get id */
+		if (snd_config_get_id(n, &id) < 0)
+			continue;
+
+		/* get value - try strings then ints */
+		if (snd_config_get_string(n, &value) < 0)
+			continue;
+
+		if (strcmp(id, "info") == 0)
+			be->ext_ops.info = lookup_ops(value);
+		else if (strcmp(id, "put") == 0)
+			be->ext_ops.put = lookup_ops(value);
+		else if (strcmp(id, "get") == 0)
+			be->ext_ops.get = lookup_ops(value);
+
+		tplg_dbg("\t\t%s = %s\n", id, value);
+	}
+
+	return 0;
+}

src/topology/tplg_local.h

@@ -206,6 +206,8 @@ int tplg_parse_channel(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
 
 int tplg_parse_ops(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
 	snd_config_t *cfg, void *private);
+int tplg_parse_ext_ops(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
+	snd_config_t *cfg, void *private);
 
 struct tplg_elem *lookup_pcm_dai_stream(struct list_head *base,
 	const char* id);