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Diffstat (limited to 'sound/soc/soc-dapm.c')
-rw-r--r--sound/soc/soc-dapm.c61
1 files changed, 48 insertions, 13 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index c4464858bf01..8698c26773b3 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -1073,7 +1073,11 @@ static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
*/
static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
struct list_head *list, enum snd_soc_dapm_direction dir,
- int (*fn)(struct snd_soc_dapm_widget *, struct list_head *))
+ int (*fn)(struct snd_soc_dapm_widget *, struct list_head *,
+ bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
+ enum snd_soc_dapm_direction)),
+ bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
+ enum snd_soc_dapm_direction))
{
enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
struct snd_soc_dapm_path *path;
@@ -1088,6 +1092,11 @@ static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
if (list)
list_add_tail(&widget->work_list, list);
+ if (custom_stop_condition && custom_stop_condition(widget, dir)) {
+ widget->endpoints[dir] = 1;
+ return widget->endpoints[dir];
+ }
+
if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
return widget->endpoints[dir];
@@ -1106,7 +1115,7 @@ static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
if (path->connect) {
path->walking = 1;
- con += fn(path->node[dir], list);
+ con += fn(path->node[dir], list, custom_stop_condition);
path->walking = 0;
}
}
@@ -1119,23 +1128,37 @@ static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
/*
* Recursively check for a completed path to an active or physically connected
* output widget. Returns number of complete paths.
+ *
+ * Optionally, can be supplied with a function acting as a stopping condition.
+ * This function takes the dapm widget currently being examined and the walk
+ * direction as an arguments, it should return true if the walk should be
+ * stopped and false otherwise.
*/
static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
- struct list_head *list)
+ struct list_head *list,
+ bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
+ enum snd_soc_dapm_direction))
{
return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
- is_connected_output_ep);
+ is_connected_output_ep, custom_stop_condition);
}
/*
* Recursively check for a completed path to an active or physically connected
* input widget. Returns number of complete paths.
+ *
+ * Optionally, can be supplied with a function acting as a stopping condition.
+ * This function takes the dapm widget currently being examined and the walk
+ * direction as an arguments, it should return true if the walk should be
+ * stopped and false otherwise.
*/
static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
- struct list_head *list)
+ struct list_head *list,
+ bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
+ enum snd_soc_dapm_direction))
{
return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
- is_connected_input_ep);
+ is_connected_input_ep, custom_stop_condition);
}
/**
@@ -1143,15 +1166,24 @@ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
* @dai: the soc DAI.
* @stream: stream direction.
* @list: list of active widgets for this stream.
+ * @custom_stop_condition: (optional) a function meant to stop the widget graph
+ * walk based on custom logic.
*
* Queries DAPM graph as to whether an valid audio stream path exists for
* the initial stream specified by name. This takes into account
* current mixer and mux kcontrol settings. Creates list of valid widgets.
*
+ * Optionally, can be supplied with a function acting as a stopping condition.
+ * This function takes the dapm widget currently being examined and the walk
+ * direction as an arguments, it should return true if the walk should be
+ * stopped and false otherwise.
+ *
* Returns the number of valid paths or negative error.
*/
int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
- struct snd_soc_dapm_widget_list **list)
+ struct snd_soc_dapm_widget_list **list,
+ bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
+ enum snd_soc_dapm_direction))
{
struct snd_soc_card *card = dai->component->card;
struct snd_soc_dapm_widget *w;
@@ -1171,9 +1203,11 @@ int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
}
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
- paths = is_connected_output_ep(dai->playback_widget, &widgets);
+ paths = is_connected_output_ep(dai->playback_widget, &widgets,
+ custom_stop_condition);
else
- paths = is_connected_input_ep(dai->capture_widget, &widgets);
+ paths = is_connected_input_ep(dai->capture_widget, &widgets,
+ custom_stop_condition);
/* Drop starting point */
list_del(widgets.next);
@@ -1268,8 +1302,8 @@ static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
DAPM_UPDATE_STAT(w, power_checks);
- in = is_connected_input_ep(w, NULL);
- out = is_connected_output_ep(w, NULL);
+ in = is_connected_input_ep(w, NULL, NULL);
+ out = is_connected_output_ep(w, NULL, NULL);
return out != 0 && in != 0;
}
@@ -1928,8 +1962,8 @@ static ssize_t dapm_widget_power_read_file(struct file *file,
in = 0;
out = 0;
} else {
- in = is_connected_input_ep(w, NULL);
- out = is_connected_output_ep(w, NULL);
+ in = is_connected_input_ep(w, NULL, NULL);
+ out = is_connected_output_ep(w, NULL, NULL);
}
ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
@@ -3282,6 +3316,7 @@ snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
mutex_unlock(&dapm->card->dapm_mutex);
return w;
}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
struct snd_soc_dapm_widget *
snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,