kfree(buf);
}
+static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
+{
+ return !list_empty(&w->dirty);
+}
+
+static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
+{
+ if (!dapm_dirty_widget(w)) {
+ dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
+ w->name, reason);
+ list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
+ }
+}
+
/* create a new dapm widget */
static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
const struct snd_soc_dapm_widget *_widget)
}
}
break;
- /* does not effect routing - always connected */
+ /* does not affect routing - always connected */
case snd_soc_dapm_pga:
case snd_soc_dapm_out_drv:
case snd_soc_dapm_output:
case snd_soc_dapm_supply:
case snd_soc_dapm_aif_in:
case snd_soc_dapm_aif_out:
- p->connect = 1;
- break;
- /* does effect routing - dynamically connected */
case snd_soc_dapm_hp:
case snd_soc_dapm_mic:
case snd_soc_dapm_spk:
case snd_soc_dapm_line:
+ p->connect = 1;
+ break;
+ /* does affect routing - dynamically connected */
case snd_soc_dapm_pre:
case snd_soc_dapm_post:
p->connect = 0;
}
EXPORT_SYMBOL_GPL(dapm_reg_event);
+static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
+{
+ if (w->power_checked)
+ return w->new_power;
+
+ if (w->force)
+ w->new_power = 1;
+ else
+ w->new_power = w->power_check(w);
+
+ w->power_checked = true;
+
+ return w->new_power;
+}
+
/* Generic check to see if a widget should be powered.
*/
static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
if (!path->sink)
continue;
- if (path->sink->force) {
- power = 1;
- break;
- }
-
- if (path->sink->power_check &&
- path->sink->power_check(path->sink)) {
+ if (dapm_widget_power_check(path->sink)) {
power = 1;
break;
}
return power;
}
+static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
+{
+ return 1;
+}
+
static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
struct snd_soc_dapm_widget *b,
bool power_up)
}
}
+static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
+ bool power, bool connect)
+{
+ /* If a connection is being made or broken then that update
+ * will have marked the peer dirty, otherwise the widgets are
+ * not connected and this update has no impact. */
+ if (!connect)
+ return;
+
+ /* If the peer is already in the state we're moving to then we
+ * won't have an impact on it. */
+ if (power != peer->power)
+ dapm_mark_dirty(peer, "peer state change");
+}
+
+static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
+ struct list_head *up_list,
+ struct list_head *down_list)
+{
+ struct snd_soc_dapm_path *path;
+
+ if (w->power == power)
+ return;
+
+ trace_snd_soc_dapm_widget_power(w, power);
+
+ /* If we changed our power state perhaps our neigbours changed
+ * also.
+ */
+ list_for_each_entry(path, &w->sources, list_sink) {
+ if (path->source) {
+ dapm_widget_set_peer_power(path->source, power,
+ path->connect);
+ }
+ }
+ list_for_each_entry(path, &w->sinks, list_source) {
+ if (path->sink) {
+ dapm_widget_set_peer_power(path->sink, power,
+ path->connect);
+ }
+ }
+
+ if (power)
+ dapm_seq_insert(w, up_list, true);
+ else
+ dapm_seq_insert(w, down_list, false);
+
+ w->power = power;
+}
+
static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
struct list_head *up_list,
struct list_head *down_list)
{
- struct snd_soc_dapm_context *d;
int power;
switch (w->id) {
break;
default:
- if (!w->power_check)
- break;
-
- if (!w->force)
- power = w->power_check(w);
- else
- power = 1;
-
- if (power) {
- d = w->dapm;
+ power = dapm_widget_power_check(w);
- /* Supplies and micbiases only bring the
- * context up to STANDBY as unless something
- * else is active and passing audio they
- * generally don't require full power.
- */
- switch (w->id) {
- case snd_soc_dapm_supply:
- case snd_soc_dapm_micbias:
- if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
- d->target_bias_level = SND_SOC_BIAS_STANDBY;
- break;
- default:
- d->target_bias_level = SND_SOC_BIAS_ON;
- break;
- }
- }
-
- if (w->power == power)
- break;
-
- trace_snd_soc_dapm_widget_power(w, power);
-
- if (power)
- dapm_seq_insert(w, up_list, true);
- else
- dapm_seq_insert(w, down_list, false);
-
- w->power = power;
+ dapm_widget_set_power(w, power, up_list, down_list);
break;
}
}
memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
+ list_for_each_entry(w, &card->widgets, list) {
+ w->power_checked = false;
+ }
+
/* Check which widgets we need to power and store them in
- * lists indicating if they should be powered up or down.
+ * lists indicating if they should be powered up or down. We
+ * only check widgets that have been flagged as dirty but note
+ * that new widgets may be added to the dirty list while we
+ * iterate.
*/
- list_for_each_entry(w, &card->widgets, list) {
+ list_for_each_entry(w, &card->dapm_dirty, dirty) {
dapm_power_one_widget(w, &up_list, &down_list);
}
+ list_for_each_entry(w, &card->widgets, list) {
+ list_del_init(&w->dirty);
+
+ if (w->power) {
+ d = w->dapm;
+
+ /* Supplies and micbiases only bring the
+ * context up to STANDBY as unless something
+ * else is active and passing audio they
+ * generally don't require full power.
+ */
+ switch (w->id) {
+ case snd_soc_dapm_supply:
+ case snd_soc_dapm_micbias:
+ if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
+ d->target_bias_level = SND_SOC_BIAS_STANDBY;
+ break;
+ default:
+ d->target_bias_level = SND_SOC_BIAS_ON;
+ break;
+ }
+ }
+
+ }
+
/* If there are no DAPM widgets then try to figure out power from the
* event type.
*/
found = 1;
/* we now need to match the string in the enum to the path */
- if (!(strcmp(path->name, e->texts[mux])))
+ if (!(strcmp(path->name, e->texts[mux]))) {
path->connect = 1; /* new connection */
- else
+ dapm_mark_dirty(path->source, "mux connection");
+ } else {
+ if (path->connect)
+ dapm_mark_dirty(path->source,
+ "mux disconnection");
path->connect = 0; /* old connection must be powered down */
+ }
}
- if (found)
+ if (found) {
+ dapm_mark_dirty(widget, "mux change");
dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
+ }
return 0;
}
/* found, now check type */
found = 1;
path->connect = connect;
+ dapm_mark_dirty(path->source, "mixer connection");
}
- if (found)
+ if (found) {
+ dapm_mark_dirty(widget, "mixer update");
dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
+ }
return 0;
}
w->connected = status;
if (status == 0)
w->force = 0;
+ dapm_mark_dirty(w, "pin configuration");
return 0;
}
break;
}
+ if (!w->power_check)
+ w->power_check = dapm_always_on_check_power;
+
/* Read the initial power state from the device */
if (w->reg >= 0) {
val = soc_widget_read(w, w->reg);
w->new = 1;
+ list_add(&w->dirty, &(w->dapm->card->dapm_dirty));
dapm_debugfs_add_widget(w);
}
INIT_LIST_HEAD(&w->sources);
INIT_LIST_HEAD(&w->sinks);
INIT_LIST_HEAD(&w->list);
+ INIT_LIST_HEAD(&w->dirty);
list_add(&w->list, &dapm->card->widgets);
/* machine layer set ups unconnected pins and insertions */
dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
w->name, w->sname, stream, event);
if (strstr(w->sname, stream)) {
+ dapm_mark_dirty(w, "stream event");
switch(event) {
case SND_SOC_DAPM_STREAM_START:
w->active = 1;
dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
w->connected = 1;
w->force = 1;
+ dapm_mark_dirty(w, "force enable");
return 0;
}
projects / deliverable / linux.git / blobdiff