From: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
struct snd_soc_dapm_route has been modified to be a dynamic
object so that it can be used to save driver specific
data while parsing topology and clean up
driver-specific data during driver unloading.
This patch makes the following changes to accomplish the above:
1. Set the dobj member of snd_soc_dapm_route during the
SOC_TPLG_PASS_GRAPH pass of topology parsing.
2. Add the remove_route() routine that will be called while
removing all dynamic objects from the component driver.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
sound/soc/soc-topology.c | 102 +++++++++++++++++++++++++++++++++------
1 file changed, 86 insertions(+), 16 deletions(-)
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 2cb0a05e2368..23d421370e6c 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -433,6 +433,23 @@ static void remove_bytes(struct snd_soc_component *comp,
kfree(sb);
}
+/* remove a route */
+static void remove_route(struct snd_soc_component *comp,
+ struct snd_soc_dobj *dobj, int pass)
+{
+ struct snd_soc_dapm_route *route =
+ container_of(dobj, struct snd_soc_dapm_route, dobj);
+
+ if (pass != SOC_TPLG_PASS_GRAPH)
+ return;
+
+ if (dobj->ops && dobj->ops->dapm_route_unload)
+ dobj->ops->dapm_route_unload(comp, dobj);
+
+ list_del(&dobj->list);
+ kfree(route);
+}
+
/* remove a widget and it's kcontrols - routes must be removed first */
static void remove_widget(struct snd_soc_component *comp,
struct snd_soc_dobj *dobj, int pass)
@@ -1119,9 +1136,10 @@ static int soc_tplg_dapm_graph_elems_load(struct soc_tplg *tplg,
struct snd_soc_tplg_hdr *hdr)
{
struct snd_soc_dapm_context *dapm = &tplg->comp->dapm;
- struct snd_soc_dapm_route route;
struct snd_soc_tplg_dapm_graph_elem *elem;
- int count = hdr->count, i;
+ struct snd_soc_dapm_route **routes;
+ int count = hdr->count, i, j;
+ int ret = 0;
if (tplg->pass != SOC_TPLG_PASS_GRAPH) {
tplg->pos += hdr->size + hdr->payload_size;
@@ -1140,36 +1158,85 @@ static int soc_tplg_dapm_graph_elems_load(struct soc_tplg *tplg,
dev_dbg(tplg->dev, "ASoC: adding %d DAPM routes for index %d\n", count,
hdr->index);
+ /* allocate memory for pointer to array of dapm routes */
+ routes = kcalloc(count, sizeof(struct snd_soc_dapm_route *),
+ GFP_KERNEL);
+ if (!routes)
+ return -ENOMEM;
+
+ /*
+ * allocate memory for each dapm route in the array.
+ * This needs to be done individually so that
+ * each route can be freed when it is removed in remove_route().
+ */
+ for (i = 0; i < count; i++) {
+ routes[i] = kzalloc(sizeof(*routes[i]), GFP_KERNEL);
+ if (!routes[i]) {
+ /* free previously allocated memory */
+ for (j = 0; j < i; j++)
+ kfree(routes[j]);
+
+ kfree(routes);
+ return -ENOMEM;
+ }
+ }
+
for (i = 0; i < count; i++) {
elem = (struct snd_soc_tplg_dapm_graph_elem *)tplg->pos;
tplg->pos += sizeof(struct snd_soc_tplg_dapm_graph_elem);
/* validate routes */
if (strnlen(elem->source, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
- SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
- return -EINVAL;
+ SNDRV_CTL_ELEM_ID_NAME_MAXLEN) {
+ ret = -EINVAL;
+ break;
+ }
if (strnlen(elem->sink, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
- SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
- return -EINVAL;
+ SNDRV_CTL_ELEM_ID_NAME_MAXLEN) {
+ ret = -EINVAL;
+ break;
+ }
if (strnlen(elem->control, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
- SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
- return -EINVAL;
+ SNDRV_CTL_ELEM_ID_NAME_MAXLEN) {
+ ret = -EINVAL;
+ break;
+ }
+
+ routes[i]->source = elem->source;
+ routes[i]->sink = elem->sink;
- route.source = elem->source;
- route.sink = elem->sink;
- route.connected = NULL; /* set to NULL atm for tplg users */
+ /* set to NULL atm for tplg users */
+ routes[i]->connected = NULL;
if (strnlen(elem->control, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) == 0)
- route.control = NULL;
+ routes[i]->control = NULL;
else
- route.control = elem->control;
+ routes[i]->control = elem->control;
+
+ /* add route dobj to dobj_list */
+ routes[i]->dobj.type = SND_SOC_DOBJ_GRAPH;
+ routes[i]->dobj.ops = tplg->ops;
+ routes[i]->dobj.index = tplg->index;
+ list_add(&routes[i]->dobj.list, &tplg->comp->dobj_list);
- soc_tplg_add_route(tplg, &route);
+ soc_tplg_add_route(tplg, routes[i]);
/* add route, but keep going if some fail */
- snd_soc_dapm_add_routes(dapm, &route, 1);
+ snd_soc_dapm_add_routes(dapm, routes[i], 1);
}
- return 0;
+ /* free memory allocated for all dapm routes in case of error */
+ if (ret < 0)
+ for (i = 0; i < count ; i++)
+ kfree(routes[i]);
+
+ /*
+ * free pointer to array of dapm routes as this is no longer needed.
+ * The memory allocated for each dapm route will be freed
+ * when it is removed in remove_route().
+ */
+ kfree(routes);
+
+ return ret;
}
static struct snd_kcontrol_new *soc_tplg_dapm_widget_dmixer_create(
@@ -2570,6 +2637,9 @@ int snd_soc_tplg_component_remove(struct snd_soc_component *comp, u32 index)
case SND_SOC_DOBJ_BYTES:
remove_bytes(comp, dobj, pass);
break;
+ case SND_SOC_DOBJ_GRAPH:
+ remove_route(comp, dobj, pass);
+ break;
case SND_SOC_DOBJ_WIDGET:
remove_widget(comp, dobj, pass);
break;
--
2.17.1
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