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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-07-05 17:24:19 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-07-06 19:06:59 +0100
commitefcc3c61b9b1e4f764e14c48c553e6d477f40512 (patch)
treef74c4890308519ef9e8563e6645d82408947bd36
parentfabd03842b77b1eb6c9b08c79be86fa38afbe310 (diff)
downloadlinux-efcc3c61b9b1e4f764e14c48c553e6d477f40512.tar.bz2
ASoC: dapm: Allow routes to be deleted at runtime
Since we're now relying on DAPM for things like enabling clocks when we reparent the clocks for widgets we need to either use conditional routes (which are expensive) or remove routes at runtime. Add a route removal API to support this use case. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
-rw-r--r--include/sound/soc-dapm.h2
-rw-r--r--sound/soc/soc-dapm.c77
2 files changed, 79 insertions, 0 deletions
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 05559e571d44..abe373d57adc 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -374,6 +374,8 @@ int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm);
void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm);
int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route, int num);
+int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
+ const struct snd_soc_dapm_route *route, int num);
int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route, int num);
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 19fda1339510..4ba47aab9801 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -2264,6 +2264,59 @@ err:
return ret;
}
+static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
+ const struct snd_soc_dapm_route *route)
+{
+ struct snd_soc_dapm_path *path, *p;
+ const char *sink;
+ const char *source;
+ char prefixed_sink[80];
+ char prefixed_source[80];
+
+ if (route->control) {
+ dev_err(dapm->dev,
+ "Removal of routes with controls not supported\n");
+ return -EINVAL;
+ }
+
+ if (dapm->codec && dapm->codec->name_prefix) {
+ snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
+ dapm->codec->name_prefix, route->sink);
+ sink = prefixed_sink;
+ snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
+ dapm->codec->name_prefix, route->source);
+ source = prefixed_source;
+ } else {
+ sink = route->sink;
+ source = route->source;
+ }
+
+ path = NULL;
+ list_for_each_entry(p, &dapm->card->paths, list) {
+ if (strcmp(p->source->name, source) != 0)
+ continue;
+ if (strcmp(p->sink->name, sink) != 0)
+ continue;
+ path = p;
+ break;
+ }
+
+ if (path) {
+ dapm_mark_dirty(path->source, "Route removed");
+ dapm_mark_dirty(path->sink, "Route removed");
+
+ list_del(&path->list);
+ list_del(&path->list_sink);
+ list_del(&path->list_source);
+ kfree(path);
+ } else {
+ dev_warn(dapm->dev, "Route %s->%s does not exist\n",
+ source, sink);
+ }
+
+ return 0;
+}
+
/**
* snd_soc_dapm_add_routes - Add routes between DAPM widgets
* @dapm: DAPM context
@@ -2298,6 +2351,30 @@ int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
+/**
+ * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
+ * @dapm: DAPM context
+ * @route: audio routes
+ * @num: number of routes
+ *
+ * Removes routes from the DAPM context.
+ */
+int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
+ const struct snd_soc_dapm_route *route, int num)
+{
+ int i, ret = 0;
+
+ mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
+ for (i = 0; i < num; i++) {
+ snd_soc_dapm_del_route(dapm, route);
+ route++;
+ }
+ mutex_unlock(&dapm->card->dapm_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
+
static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route)
{