| Message ID | 1596541616-27688-3-git-send-email-rnayak@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for assigned-performance-states | expand |
On Tue, 4 Aug 2020 at 13:47, Rajendra Nayak <rnayak@codeaurora.org> wrote: > > For devices which have 'assigned-performance-states' specified in DT, > set the specified performance state during attach and drop it on detach. > Also drop/set as part of runtime suspend/resume callbacks. To allow flexibility, I would prefer to keep the performance state being orthogonal to the power on/off state for a genpd. Therefore, I am wondering if this is better handled by the consumer driver instead? Kind regards Uffe > > Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> > --- > drivers/base/power/domain.c | 27 +++++++++++++++++++++++++++ > include/linux/pm_domain.h | 1 + > 2 files changed, 28 insertions(+) > > diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c > index 0a01df60..8704823 100644 > --- a/drivers/base/power/domain.c > +++ b/drivers/base/power/domain.c > @@ -810,6 +810,10 @@ static int genpd_runtime_suspend(struct device *dev) > if (irq_safe_dev_in_no_sleep_domain(dev, genpd)) > return 0; > > + /* Drop the assigned performance state */ > + if (dev_gpd_data(dev)->assigned_pstate) > + dev_pm_genpd_set_performance_state(dev, 0); > + > genpd_lock(genpd); > genpd_power_off(genpd, true, 0); > genpd_unlock(genpd); > @@ -829,6 +833,7 @@ static int genpd_runtime_resume(struct device *dev) > { > struct generic_pm_domain *genpd; > struct gpd_timing_data *td = &dev_gpd_data(dev)->td; > + unsigned int assigned_pstate = dev_gpd_data(dev)->assigned_pstate; > bool runtime_pm = pm_runtime_enabled(dev); > ktime_t time_start; > s64 elapsed_ns; > @@ -857,6 +862,9 @@ static int genpd_runtime_resume(struct device *dev) > if (ret) > return ret; > > + /* Set the assigned performance state */ > + if (assigned_pstate) > + dev_pm_genpd_set_performance_state(dev, assigned_pstate); > out: > /* Measure resume latency. */ > time_start = 0; > @@ -890,6 +898,8 @@ static int genpd_runtime_resume(struct device *dev) > err_poweroff: > if (!pm_runtime_is_irq_safe(dev) || > (pm_runtime_is_irq_safe(dev) && genpd_is_irq_safe(genpd))) { > + if (assigned_pstate) > + dev_pm_genpd_set_performance_state(dev, 0); > genpd_lock(genpd); > genpd_power_off(genpd, true, 0); > genpd_unlock(genpd); > @@ -2405,6 +2415,12 @@ static void genpd_dev_pm_detach(struct device *dev, bool power_off) > > dev_dbg(dev, "removing from PM domain %s\n", pd->name); > > + /* Drop the assigned performance state */ > + if (dev_gpd_data(dev)->assigned_pstate) { > + dev_pm_genpd_set_performance_state(dev, 0); > + dev_gpd_data(dev)->assigned_pstate = 0; > + } > + > for (i = 1; i < GENPD_RETRY_MAX_MS; i <<= 1) { > ret = genpd_remove_device(pd, dev); > if (ret != -EAGAIN) > @@ -2442,6 +2458,7 @@ static void genpd_dev_pm_sync(struct device *dev) > static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, > unsigned int index, bool power_on) > { > + unsigned int assigned_pstate; > struct of_phandle_args pd_args; > struct generic_pm_domain *pd; > int ret; > @@ -2485,6 +2502,16 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, > if (ret) > genpd_remove_device(pd, dev); > > + /* Set the assigned performance state */ > + if (!of_property_read_u32_index(base_dev->of_node, > + "assigned-performance-states", > + index, &assigned_pstate)) { > + if (assigned_pstate) { > + dev_pm_genpd_set_performance_state(dev, assigned_pstate); > + dev_gpd_data(dev)->assigned_pstate = assigned_pstate; > + } > + } > + > return ret ? -EPROBE_DEFER : 1; > } > > diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h > index 9ec78ee..4a415ee 100644 > --- a/include/linux/pm_domain.h > +++ b/include/linux/pm_domain.h > @@ -180,6 +180,7 @@ struct generic_pm_domain_data { > struct notifier_block nb; > int cpu; > unsigned int performance_state; > + unsigned int assigned_pstate; > void *data; > }; > > -- > QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member > of Code Aurora Forum, hosted by The Linux Foundation >
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 0a01df60..8704823 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -810,6 +810,10 @@ static int genpd_runtime_suspend(struct device *dev) if (irq_safe_dev_in_no_sleep_domain(dev, genpd)) return 0; + /* Drop the assigned performance state */ + if (dev_gpd_data(dev)->assigned_pstate) + dev_pm_genpd_set_performance_state(dev, 0); + genpd_lock(genpd); genpd_power_off(genpd, true, 0); genpd_unlock(genpd); @@ -829,6 +833,7 @@ static int genpd_runtime_resume(struct device *dev) { struct generic_pm_domain *genpd; struct gpd_timing_data *td = &dev_gpd_data(dev)->td; + unsigned int assigned_pstate = dev_gpd_data(dev)->assigned_pstate; bool runtime_pm = pm_runtime_enabled(dev); ktime_t time_start; s64 elapsed_ns; @@ -857,6 +862,9 @@ static int genpd_runtime_resume(struct device *dev) if (ret) return ret; + /* Set the assigned performance state */ + if (assigned_pstate) + dev_pm_genpd_set_performance_state(dev, assigned_pstate); out: /* Measure resume latency. */ time_start = 0; @@ -890,6 +898,8 @@ static int genpd_runtime_resume(struct device *dev) err_poweroff: if (!pm_runtime_is_irq_safe(dev) || (pm_runtime_is_irq_safe(dev) && genpd_is_irq_safe(genpd))) { + if (assigned_pstate) + dev_pm_genpd_set_performance_state(dev, 0); genpd_lock(genpd); genpd_power_off(genpd, true, 0); genpd_unlock(genpd); @@ -2405,6 +2415,12 @@ static void genpd_dev_pm_detach(struct device *dev, bool power_off) dev_dbg(dev, "removing from PM domain %s\n", pd->name); + /* Drop the assigned performance state */ + if (dev_gpd_data(dev)->assigned_pstate) { + dev_pm_genpd_set_performance_state(dev, 0); + dev_gpd_data(dev)->assigned_pstate = 0; + } + for (i = 1; i < GENPD_RETRY_MAX_MS; i <<= 1) { ret = genpd_remove_device(pd, dev); if (ret != -EAGAIN) @@ -2442,6 +2458,7 @@ static void genpd_dev_pm_sync(struct device *dev) static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, unsigned int index, bool power_on) { + unsigned int assigned_pstate; struct of_phandle_args pd_args; struct generic_pm_domain *pd; int ret; @@ -2485,6 +2502,16 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, if (ret) genpd_remove_device(pd, dev); + /* Set the assigned performance state */ + if (!of_property_read_u32_index(base_dev->of_node, + "assigned-performance-states", + index, &assigned_pstate)) { + if (assigned_pstate) { + dev_pm_genpd_set_performance_state(dev, assigned_pstate); + dev_gpd_data(dev)->assigned_pstate = assigned_pstate; + } + } + return ret ? -EPROBE_DEFER : 1; } diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 9ec78ee..4a415ee 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -180,6 +180,7 @@ struct generic_pm_domain_data { struct notifier_block nb; int cpu; unsigned int performance_state; + unsigned int assigned_pstate; void *data; };
For devices which have 'assigned-performance-states' specified in DT, set the specified performance state during attach and drop it on detach. Also drop/set as part of runtime suspend/resume callbacks. Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> --- drivers/base/power/domain.c | 27 +++++++++++++++++++++++++++ include/linux/pm_domain.h | 1 + 2 files changed, 28 insertions(+)