diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/domain.c | 60 | ||||
| -rw-r--r-- | drivers/base/power/domain_governor.c | 64 | ||||
| -rw-r--r-- | drivers/base/power/trace.c | 4 |
3 files changed, 94 insertions, 34 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 301b785f9f56..56705b52758e 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -104,6 +104,7 @@ static void genpd_sd_counter_inc(struct generic_pm_domain *genpd) static int genpd_power_on(struct generic_pm_domain *genpd, bool timed) { + unsigned int state_idx = genpd->state_idx; ktime_t time_start; s64 elapsed_ns; int ret; @@ -120,10 +121,10 @@ static int genpd_power_on(struct generic_pm_domain *genpd, bool timed) return ret; elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start)); - if (elapsed_ns <= genpd->power_on_latency_ns) + if (elapsed_ns <= genpd->states[state_idx].power_on_latency_ns) return ret; - genpd->power_on_latency_ns = elapsed_ns; + genpd->states[state_idx].power_on_latency_ns = elapsed_ns; genpd->max_off_time_changed = true; pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", genpd->name, "on", elapsed_ns); @@ -133,6 +134,7 @@ static int genpd_power_on(struct generic_pm_domain *genpd, bool timed) static int genpd_power_off(struct generic_pm_domain *genpd, bool timed) { + unsigned int state_idx = genpd->state_idx; ktime_t time_start; s64 elapsed_ns; int ret; @@ -149,10 +151,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool timed) return ret; elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start)); - if (elapsed_ns <= genpd->power_off_latency_ns) + if (elapsed_ns <= genpd->states[state_idx].power_off_latency_ns) return ret; - genpd->power_off_latency_ns = elapsed_ns; + genpd->states[state_idx].power_off_latency_ns = elapsed_ns; genpd->max_off_time_changed = true; pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", genpd->name, "off", elapsed_ns); @@ -485,8 +487,13 @@ static int pm_genpd_runtime_resume(struct device *dev) if (timed && runtime_pm) time_start = ktime_get(); - genpd_start_dev(genpd, dev); - genpd_restore_dev(genpd, dev); + ret = genpd_start_dev(genpd, dev); + if (ret) + goto err_poweroff; + + ret = genpd_restore_dev(genpd, dev); + if (ret) + goto err_stop; /* Update resume latency value if the measured time exceeds it. */ if (timed && runtime_pm) { @@ -501,6 +508,17 @@ static int pm_genpd_runtime_resume(struct device *dev) } return 0; + +err_stop: + genpd_stop_dev(genpd, dev); +err_poweroff: + if (!dev->power.irq_safe) { + mutex_lock(&genpd->lock); + genpd_poweroff(genpd, 0); + mutex_unlock(&genpd->lock); + } + + return ret; } static bool pd_ignore_unused; @@ -585,6 +603,8 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd, || atomic_read(&genpd->sd_count) > 0) return; + /* Choose the deepest state when suspending */ + genpd->state_idx = genpd->state_count - 1; genpd_power_off(genpd, timed); genpd->status = GPD_STATE_POWER_OFF; @@ -1378,7 +1398,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, mutex_lock(&subdomain->lock); mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); - if (!list_empty(&subdomain->slave_links) || subdomain->device_count) { + if (!list_empty(&subdomain->master_links) || subdomain->device_count) { pr_warn("%s: unable to remove subdomain %s\n", genpd->name, subdomain->name); ret = -EBUSY; @@ -1508,6 +1528,20 @@ void pm_genpd_init(struct generic_pm_domain *genpd, genpd->dev_ops.start = pm_clk_resume; } + if (genpd->state_idx >= GENPD_MAX_NUM_STATES) { + pr_warn("Initial state index out of bounds.\n"); + genpd->state_idx = GENPD_MAX_NUM_STATES - 1; + } + + if (genpd->state_count > GENPD_MAX_NUM_STATES) { + pr_warn("Limiting states to %d\n", GENPD_MAX_NUM_STATES); + genpd->state_count = GENPD_MAX_NUM_STATES; + } + + /* Use only one "off" state if there were no states declared */ + if (genpd->state_count == 0) + genpd->state_count = 1; + mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); mutex_unlock(&gpd_list_lock); @@ -1668,6 +1702,9 @@ struct generic_pm_domain *of_genpd_get_from_provider( struct generic_pm_domain *genpd = ERR_PTR(-ENOENT); struct of_genpd_provider *provider; + if (!genpdspec) + return ERR_PTR(-EINVAL); + mutex_lock(&of_genpd_mutex); /* Check if we have such a provider in our array */ @@ -1864,6 +1901,7 @@ static int pm_genpd_summary_one(struct seq_file *s, struct pm_domain_data *pm_data; const char *kobj_path; struct gpd_link *link; + char state[16]; int ret; ret = mutex_lock_interruptible(&genpd->lock); @@ -1872,7 +1910,13 @@ static int pm_genpd_summary_one(struct seq_file *s, if (WARN_ON(genpd->status >= ARRAY_SIZE(status_lookup))) goto exit; - seq_printf(s, "%-30s %-15s ", genpd->name, status_lookup[genpd->status]); + if (genpd->status == GPD_STATE_POWER_OFF) + snprintf(state, sizeof(state), "%s-%u", + status_lookup[genpd->status], genpd->state_idx); + else + snprintf(state, sizeof(state), "%s", + status_lookup[genpd->status]); + seq_printf(s, "%-30s %-15s ", genpd->name, state); /* * Modifications on the list require holding locks on both diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c index 1e937ac5f456..00a5436dd44b 100644 --- a/drivers/base/power/domain_governor.c +++ b/drivers/base/power/domain_governor.c @@ -98,7 +98,8 @@ static bool default_stop_ok(struct device *dev) * * This routine must be executed under the PM domain's lock. */ -static bool default_power_down_ok(struct dev_pm_domain *pd) +static bool __default_power_down_ok(struct dev_pm_domain *pd, + unsigned int state) { struct generic_pm_domain *genpd = pd_to_genpd(pd); struct gpd_link *link; @@ -106,27 +107,9 @@ static bool default_power_down_ok(struct dev_pm_domain *pd) s64 min_off_time_ns; s64 off_on_time_ns; - if (genpd->max_off_time_changed) { - struct gpd_link *link; - - /* - * We have to invalidate the cached results for the masters, so - * use the observation that default_power_down_ok() is not - * going to be called for any master until this instance - * returns. - */ - list_for_each_entry(link, &genpd->slave_links, slave_node) - link->master->max_off_time_changed = true; - - genpd->max_off_time_changed = false; - genpd->cached_power_down_ok = false; - genpd->max_off_time_ns = -1; - } else { - return genpd->cached_power_down_ok; - } + off_on_time_ns = genpd->states[state].power_off_latency_ns + + genpd->states[state].power_on_latency_ns; - off_on_time_ns = genpd->power_off_latency_ns + - genpd->power_on_latency_ns; min_off_time_ns = -1; /* @@ -186,8 +169,6 @@ static bool default_power_down_ok(struct dev_pm_domain *pd) min_off_time_ns = constraint_ns; } - genpd->cached_power_down_ok = true; - /* * If the computed minimum device off time is negative, there are no * latency constraints, so the domain can spend arbitrary time in the @@ -201,10 +182,45 @@ static bool default_power_down_ok(struct dev_pm_domain *pd) * time and the time needed to turn the domain on is the maximum * theoretical time this domain can spend in the "off" state. */ - genpd->max_off_time_ns = min_off_time_ns - genpd->power_on_latency_ns; + genpd->max_off_time_ns = min_off_time_ns - + genpd->states[state].power_on_latency_ns; return true; } +static bool default_power_down_ok(struct dev_pm_domain *pd) +{ + struct generic_pm_domain *genpd = pd_to_genpd(pd); + struct gpd_link *link; + + if (!genpd->max_off_time_changed) + return genpd->cached_power_down_ok; + + /* + * We have to invalidate the cached results for the masters, so + * use the observation that default_power_down_ok() is not + * going to be called for any master until this instance + * returns. + */ + list_for_each_entry(link, &genpd->slave_links, slave_node) + link->master->max_off_time_changed = true; + + genpd->max_off_time_ns = -1; + genpd->max_off_time_changed = false; + genpd->cached_power_down_ok = true; + genpd->state_idx = genpd->state_count - 1; + + /* Find a state to power down to, starting from the deepest. */ + while (!__default_power_down_ok(pd, genpd->state_idx)) { + if (genpd->state_idx == 0) { + genpd->cached_power_down_ok = false; + break; + } + genpd->state_idx--; + } + + return genpd->cached_power_down_ok; +} + static bool always_on_power_down_ok(struct dev_pm_domain *domain) { return false; diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c index a311cfa4c5bd..a6975795e7f3 100644 --- a/drivers/base/power/trace.c +++ b/drivers/base/power/trace.c @@ -166,14 +166,14 @@ void generate_pm_trace(const void *tracedata, unsigned int user) } EXPORT_SYMBOL(generate_pm_trace); -extern char __tracedata_start, __tracedata_end; +extern char __tracedata_start[], __tracedata_end[]; static int show_file_hash(unsigned int value) { int match; char *tracedata; match = 0; - for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ; + for (tracedata = __tracedata_start ; tracedata < __tracedata_end ; tracedata += 2 + sizeof(unsigned long)) { unsigned short lineno = *(unsigned short *)tracedata; const char *file = *(const char **)(tracedata + 2); |