+
+struct media_pad *media_parse_pad(struct media_device *media,
+ const char *p, char **endp)
+{
+ unsigned int entity_id, pad;
+ struct media_entity *entity;
+ char *end;
+
+ for (; isspace(*p); ++p);
+
+ if (*p == '"') {
+ for (end = (char *)p + 1; *end && *end != '"'; ++end);
+ if (*end != '"')
+ return NULL;
+
+ entity = media_get_entity_by_name(media, p + 1, end - p - 1);
+ if (entity == NULL)
+ return NULL;
+
+ ++end;
+ } else {
+ entity_id = strtoul(p, &end, 10);
+ entity = media_get_entity_by_id(media, entity_id);
+ if (entity == NULL)
+ return NULL;
+ }
+ for (; isspace(*end); ++end);
+
+ if (*end != ':')
+ return NULL;
+ for (p = end + 1; isspace(*p); ++p);
+
+ pad = strtoul(p, &end, 10);
+ for (p = end; isspace(*p); ++p);
+
+ if (pad >= entity->info.pads)
+ return NULL;
+
+ for (p = end; isspace(*p); ++p);
+ if (endp)
+ *endp = (char *)p;
+
+ return &entity->pads[pad];
+}
+
+struct media_link *media_parse_link(struct media_device *media,
+ const char *p, char **endp)
+{
+ struct media_link *link;
+ struct media_pad *source;
+ struct media_pad *sink;
+ unsigned int i;
+ char *end;
+
+ source = media_parse_pad(media, p, &end);
+ if (source == NULL)
+ return NULL;
+
+ if (end[0] != '-' || end[1] != '>')
+ return NULL;
+ p = end + 2;
+
+ sink = media_parse_pad(media, p, &end);
+ if (sink == NULL)
+ return NULL;
+
+ *endp = end;
+
+ for (i = 0; i < source->entity->num_links; i++) {
+ link = &source->entity->links[i];
+
+ if (link->source == source && link->sink == sink)
+ return link;
+ }
+
+ return NULL;
+}
+
+int media_parse_setup_link(struct media_device *media,
+ const char *p, char **endp)
+{
+ struct media_link *link;
+ __u32 flags;
+ char *end;
+
+ link = media_parse_link(media, p, &end);
+ if (link == NULL) {
+ dprintf("Unable to parse link\n");
+ return -EINVAL;
+ }
+
+ p = end;
+ if (*p++ != '[') {
+ dprintf("Unable to parse link flags\n");
+ return -EINVAL;
+ }
+
+ flags = strtoul(p, &end, 10);
+ for (p = end; isspace(*p); p++);
+ if (*p++ != ']') {
+ dprintf("Unable to parse link flags\n");
+ return -EINVAL;
+ }
+
+ for (; isspace(*p); p++);
+ *endp = (char *)p;
+
+ dprintf("Setting up link %u:%u -> %u:%u [%u]\n",
+ link->source->entity->info.id, link->source->index,
+ link->sink->entity->info.id, link->sink->index,
+ flags);
+
+ return media_setup_link(media, link->source, link->sink, flags);
+}
+
+int media_parse_setup_links(struct media_device *media, const char *p)
+{
+ char *end;
+ int ret;
+
+ do {
+ ret = media_parse_setup_link(media, p, &end);
+ if (ret < 0)
+ return ret;
+
+ p = end + 1;
+ } while (*end == ',');
+
+ return *end ? -EINVAL : 0;
+}