Lines Matching +full:domain +full:- +full:idle +full:- +full:state
1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/domain_governor.c - Governors for device PM domains.
20 if (dev->power.subsys_data && dev->power.subsys_data->domain_data) { in dev_update_qos_constraint()
22 * Only take suspend-time QoS constraints of devices into in dev_update_qos_constraint()
28 constraint_ns = dev_gpd_data(dev)->td.effective_constraint_ns; in dev_update_qos_constraint()
31 * The child is not in a domain and there's no info on its in dev_update_qos_constraint()
47 * default_suspend_ok - Default PM domain governor routine to suspend devices.
52 struct gpd_timing_data *td = &dev_gpd_data(dev)->td; in default_suspend_ok()
58 spin_lock_irqsave(&dev->power.lock, flags); in default_suspend_ok()
60 if (!td->constraint_changed) { in default_suspend_ok()
61 bool ret = td->cached_suspend_ok; in default_suspend_ok()
63 spin_unlock_irqrestore(&dev->power.lock, flags); in default_suspend_ok()
66 td->constraint_changed = false; in default_suspend_ok()
67 td->cached_suspend_ok = false; in default_suspend_ok()
68 td->effective_constraint_ns = 0; in default_suspend_ok()
71 spin_unlock_irqrestore(&dev->power.lock, flags); in default_suspend_ok()
82 if (!dev->power.ignore_children) in default_suspend_ok()
88 td->effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS; in default_suspend_ok()
89 td->cached_suspend_ok = true; in default_suspend_ok()
93 * domain has a zero PM QoS constraint and it's better not to in default_suspend_ok()
99 constraint_ns -= td->suspend_latency_ns + in default_suspend_ok()
100 td->resume_latency_ns; in default_suspend_ok()
109 td->effective_constraint_ns = constraint_ns; in default_suspend_ok()
110 td->cached_suspend_ok = true; in default_suspend_ok()
117 return td->cached_suspend_ok; in default_suspend_ok()
121 unsigned int state) in __default_power_down_ok() argument
129 off_on_time_ns = genpd->states[state].power_off_latency_ns + in __default_power_down_ok()
130 genpd->states[state].power_on_latency_ns; in __default_power_down_ok()
132 min_off_time_ns = -1; in __default_power_down_ok()
138 list_for_each_entry(link, &genpd->parent_links, parent_node) { in __default_power_down_ok()
139 struct generic_pm_domain *sd = link->child; in __default_power_down_ok()
140 s64 sd_max_off_ns = sd->max_off_time_ns; in __default_power_down_ok()
147 * the current domain to turn off and on (that's how much time in __default_power_down_ok()
158 * Check if the devices in the domain can be off enough time. in __default_power_down_ok()
160 list_for_each_entry(pdd, &genpd->dev_list, list_node) { in __default_power_down_ok()
166 * domain to turn off and on (that's how much time it will in __default_power_down_ok()
169 td = &to_gpd_data(pdd)->td; in __default_power_down_ok()
170 constraint_ns = td->effective_constraint_ns; in __default_power_down_ok()
173 * devices in the domain are suspended, so it must be positive. in __default_power_down_ok()
187 * latency constraints, so the domain can spend arbitrary time in the in __default_power_down_ok()
188 * "off" state. in __default_power_down_ok()
195 * time and the time needed to turn the domain on is the maximum in __default_power_down_ok()
196 * theoretical time this domain can spend in the "off" state. in __default_power_down_ok()
198 genpd->max_off_time_ns = min_off_time_ns - in __default_power_down_ok()
199 genpd->states[state].power_on_latency_ns; in __default_power_down_ok()
204 * default_power_down_ok - Default generic PM domain power off governor routine.
205 * @pd: PM domain to check.
207 * This routine must be executed under the PM domain's lock.
214 if (!genpd->max_off_time_changed) { in default_power_down_ok()
215 genpd->state_idx = genpd->cached_power_down_state_idx; in default_power_down_ok()
216 return genpd->cached_power_down_ok; in default_power_down_ok()
225 list_for_each_entry(link, &genpd->child_links, child_node) in default_power_down_ok()
226 link->parent->max_off_time_changed = true; in default_power_down_ok()
228 genpd->max_off_time_ns = -1; in default_power_down_ok()
229 genpd->max_off_time_changed = false; in default_power_down_ok()
230 genpd->cached_power_down_ok = true; in default_power_down_ok()
231 genpd->state_idx = genpd->state_count - 1; in default_power_down_ok()
233 /* Find a state to power down to, starting from the deepest. */ in default_power_down_ok()
234 while (!__default_power_down_ok(pd, genpd->state_idx)) { in default_power_down_ok()
235 if (genpd->state_idx == 0) { in default_power_down_ok()
236 genpd->cached_power_down_ok = false; in default_power_down_ok()
239 genpd->state_idx--; in default_power_down_ok()
242 genpd->cached_power_down_state_idx = genpd->state_idx; in default_power_down_ok()
243 return genpd->cached_power_down_ok; in default_power_down_ok()
246 static bool always_on_power_down_ok(struct dev_pm_domain *domain) in always_on_power_down_ok() argument
264 if (!(genpd->flags & GENPD_FLAG_CPU_DOMAIN)) in cpu_power_down_ok()
268 * Find the next wakeup for any of the online CPUs within the PM domain in cpu_power_down_ok()
269 * and its subdomains. Note, we only need the genpd->cpus, as it already in cpu_power_down_ok()
273 for_each_cpu_and(cpu, genpd->cpus, cpu_online_mask) { in cpu_power_down_ok()
276 next_hrtimer = READ_ONCE(dev->next_hrtimer); in cpu_power_down_ok()
282 /* The minimum idle duration is from now - until the next wakeup. */ in cpu_power_down_ok()
288 * Find the deepest idle state that has its residency value satisfied in cpu_power_down_ok()
289 * and by also taking into account the power off latency for the state. in cpu_power_down_ok()
290 * Start at the state picked by the dev PM QoS constraint validation. in cpu_power_down_ok()
292 i = genpd->state_idx; in cpu_power_down_ok()
294 if (idle_duration_ns >= (genpd->states[i].residency_ns + in cpu_power_down_ok()
295 genpd->states[i].power_off_latency_ns)) { in cpu_power_down_ok()
296 genpd->state_idx = i; in cpu_power_down_ok()
299 } while (--i >= 0); in cpu_power_down_ok()
316 * pm_genpd_gov_always_on - A governor implementing an always-on policy