linux-4.4.1/snd_soc_dapm_add_route() の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-4.4.1/snd_soc_dapm_add_route() へ行く。
  • 1 (2018-06-22 (金) 12:28:45)

参照元†

• linux-4.4.1/snd_soc_dapm_add_path()

説明†

• パス: linux-4.4.1/sound/soc/soc-dapm.c

• FIXME: これは何？
  • 説明

引数†

• struct snd_soc_dapm_context *dapm
  • linux-4.4.1/snd_soc_dapm_context
• const struct snd_soc_dapm_route *route
  • linux-4.4.1/snd_soc_dapm_route

返り値†

• int

参考†

実装†

static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
				  const struct snd_soc_dapm_route *route)
{
	struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
	struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
	const char *sink;
	const char *source;
	char prefixed_sink[80];
	char prefixed_source[80];
	const char *prefix;
	int ret;

• • linux-4.4.1/snd_soc_dapm_widget

	prefix = soc_dapm_prefix(dapm);
	if (prefix) {
		snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
			 prefix, route->sink);
		sink = prefixed_sink;
		snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
			 prefix, route->source);
		source = prefixed_source;
	} else {
		sink = route->sink;
		source = route->source;
	}

• • linux-4.4.1/soc_dapm_prefix()
  • linux-4.4.1/snprintf()

	wsource = dapm_wcache_lookup(&dapm->path_source_cache, source);
	wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink);

	if (wsink && wsource)
		goto skip_search;

• • linux-4.4.1/dapm_wcache_lookup()

	/*
	 * find src and dest widgets over all widgets but favor a widget from
	 * current DAPM context
	 */
	list_for_each_entry(w, &dapm->card->widgets, list) {
		if (!wsink && !(strcmp(w->name, sink))) {
			wtsink = w;
			if (w->dapm == dapm) {
				wsink = w;
				if (wsource)
					break;
			}
			continue;
		}
		if (!wsource && !(strcmp(w->name, source))) {
			wtsource = w;
			if (w->dapm == dapm) {
				wsource = w;
				if (wsink)
					break;
			}
		}
	}

• • linux-4.4.1/list_for_each_entry()
  • linux-4.4.1/strcmp()

	/* use widget from another DAPM context if not found from this */
	if (!wsink)
		wsink = wtsink;
	if (!wsource)
		wsource = wtsource;

	if (wsource == NULL) {
		dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
			route->source);
		return -ENODEV;
	}
	if (wsink == NULL) {
		dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
			route->sink);
		return -ENODEV;
	}

• • linux-4.4.1/dev_err()

skip_search:
	dapm_wcache_update(&dapm->path_sink_cache, wsink);
	dapm_wcache_update(&dapm->path_source_cache, wsource);

	ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
		route->connected);
	if (ret)
		goto err;

• • linux-4.4.1/dapm_wcache_update()
  • linux-4.4.1/snd_soc_dapm_add_path()

	return 0;
err:
	dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
		 source, route->control, sink);
	return ret;

• • linux-4.4.1/dev_warn()

}

コメント†