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path: root/drivers/base/power/domain.c
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Diffstat (limited to 'drivers/base/power/domain.c')
-rw-r--r--drivers/base/power/domain.c87
1 files changed, 65 insertions, 22 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 9a14eedacb92..aaf6c83b5cf6 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -297,6 +297,18 @@ static int _genpd_reeval_performance_state(struct generic_pm_domain *genpd,
return state;
}
+static int genpd_xlate_performance_state(struct generic_pm_domain *genpd,
+ struct generic_pm_domain *parent,
+ unsigned int pstate)
+{
+ if (!parent->set_performance_state)
+ return pstate;
+
+ return dev_pm_opp_xlate_performance_state(genpd->opp_table,
+ parent->opp_table,
+ pstate);
+}
+
static int _genpd_set_performance_state(struct generic_pm_domain *genpd,
unsigned int state, int depth)
{
@@ -311,13 +323,8 @@ static int _genpd_set_performance_state(struct generic_pm_domain *genpd,
list_for_each_entry(link, &genpd->child_links, child_node) {
parent = link->parent;
- if (!parent->set_performance_state)
- continue;
-
/* Find parent's performance state */
- ret = dev_pm_opp_xlate_performance_state(genpd->opp_table,
- parent->opp_table,
- state);
+ ret = genpd_xlate_performance_state(genpd, parent, state);
if (unlikely(ret < 0))
goto err;
@@ -339,9 +346,11 @@ static int _genpd_set_performance_state(struct generic_pm_domain *genpd,
goto err;
}
- ret = genpd->set_performance_state(genpd, state);
- if (ret)
- goto err;
+ if (genpd->set_performance_state) {
+ ret = genpd->set_performance_state(genpd, state);
+ if (ret)
+ goto err;
+ }
genpd->performance_state = state;
return 0;
@@ -352,9 +361,6 @@ err:
child_node) {
parent = link->parent;
- if (!parent->set_performance_state)
- continue;
-
genpd_lock_nested(parent, depth + 1);
parent_state = link->prev_performance_state;
@@ -399,9 +405,6 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
if (!genpd)
return -ENODEV;
- if (unlikely(!genpd->set_performance_state))
- return -EINVAL;
-
if (WARN_ON(!dev->power.subsys_data ||
!dev->power.subsys_data->domain_data))
return -EINVAL;
@@ -423,6 +426,35 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
}
EXPORT_SYMBOL_GPL(dev_pm_genpd_set_performance_state);
+/**
+ * dev_pm_genpd_set_next_wakeup - Notify PM framework of an impending wakeup.
+ *
+ * @dev: Device to handle
+ * @next: impending interrupt/wakeup for the device
+ *
+ *
+ * Allow devices to inform of the next wakeup. It's assumed that the users
+ * guarantee that the genpd wouldn't be detached while this routine is getting
+ * called. Additionally, it's also assumed that @dev isn't runtime suspended
+ * (RPM_SUSPENDED)."
+ * Although devices are expected to update the next_wakeup after the end of
+ * their usecase as well, it is possible the devices themselves may not know
+ * about that, so stale @next will be ignored when powering off the domain.
+ */
+void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next)
+{
+ struct generic_pm_domain_data *gpd_data;
+ struct generic_pm_domain *genpd;
+
+ genpd = dev_to_genpd_safe(dev);
+ if (!genpd)
+ return;
+
+ gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
+ gpd_data->next_wakeup = next;
+}
+EXPORT_SYMBOL_GPL(dev_pm_genpd_set_next_wakeup);
+
static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
{
unsigned int state_idx = genpd->state_idx;
@@ -934,8 +966,7 @@ static int genpd_runtime_resume(struct device *dev)
err_stop:
genpd_stop_dev(genpd, dev);
err_poweroff:
- if (!pm_runtime_is_irq_safe(dev) ||
- (pm_runtime_is_irq_safe(dev) && genpd_is_irq_safe(genpd))) {
+ if (!pm_runtime_is_irq_safe(dev) || genpd_is_irq_safe(genpd)) {
genpd_lock(genpd);
genpd_power_off(genpd, true, 0);
genpd_unlock(genpd);
@@ -1465,6 +1496,7 @@ static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev)
gpd_data->td.constraint_changed = true;
gpd_data->td.effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier;
+ gpd_data->next_wakeup = KTIME_MAX;
spin_lock_irq(&dev->power.lock);
@@ -2463,7 +2495,7 @@ int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
out:
mutex_unlock(&gpd_list_lock);
- return ret;
+ return ret == -ENOENT ? -EPROBE_DEFER : ret;
}
EXPORT_SYMBOL_GPL(of_genpd_add_subdomain);
@@ -2952,7 +2984,15 @@ static void rtpm_status_str(struct seq_file *s, struct device *dev)
else
WARN_ON(1);
- seq_puts(s, p);
+ seq_printf(s, "%-25s ", p);
+}
+
+static void perf_status_str(struct seq_file *s, struct device *dev)
+{
+ struct generic_pm_domain_data *gpd_data;
+
+ gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
+ seq_put_decimal_ull(s, "", gpd_data->performance_state);
}
static int genpd_summary_one(struct seq_file *s,
@@ -2980,7 +3020,7 @@ static int genpd_summary_one(struct seq_file *s,
else
snprintf(state, sizeof(state), "%s",
status_lookup[genpd->status]);
- seq_printf(s, "%-30s %-15s ", genpd->name, state);
+ seq_printf(s, "%-30s %-50s %u", genpd->name, state, genpd->performance_state);
/*
* Modifications on the list require holding locks on both
@@ -2988,6 +3028,8 @@ static int genpd_summary_one(struct seq_file *s,
* Also genpd->name is immutable.
*/
list_for_each_entry(link, &genpd->parent_links, parent_node) {
+ if (list_is_first(&link->parent_node, &genpd->parent_links))
+ seq_printf(s, "\n%48s", " ");
seq_printf(s, "%s", link->child->name);
if (!list_is_last(&link->parent_node, &genpd->parent_links))
seq_puts(s, ", ");
@@ -3002,6 +3044,7 @@ static int genpd_summary_one(struct seq_file *s,
seq_printf(s, "\n %-50s ", kobj_path);
rtpm_status_str(s, pm_data->dev);
+ perf_status_str(s, pm_data->dev);
kfree(kobj_path);
}
@@ -3017,9 +3060,9 @@ static int summary_show(struct seq_file *s, void *data)
struct generic_pm_domain *genpd;
int ret = 0;
- seq_puts(s, "domain status children\n");
+ seq_puts(s, "domain status children performance\n");
seq_puts(s, " /device runtime status\n");
- seq_puts(s, "----------------------------------------------------------------------\n");
+ seq_puts(s, "----------------------------------------------------------------------------------------------\n");
ret = mutex_lock_interruptible(&gpd_list_lock);
if (ret)
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-27 19:10:57 +0300