| Message ID | 20230327193829.3756640-3-abel.vesa@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | Allow genpd providers to power off domains on sync state | expand |
On Mon, Mar 27, 2023 at 10:38:27PM +0300, Abel Vesa wrote: > Instead of aggregating different corner values on sync state callback, > call the genpd API for queuing up the power off. This will also mark the > domain as powered off in the debugfs genpd summary. Also, until sync > state has been reached, return busy on power off request, in order to > allow genpd core to know that the actual domain hasn't been powered of > from the "disable unused" late initcall. > > Signed-off-by: Abel Vesa <abel.vesa@linaro.org> > Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> > --- > drivers/soc/qcom/rpmhpd.c | 19 +++++++------------ > 1 file changed, 7 insertions(+), 12 deletions(-) > > diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c > index f20e2a49a669..ec7926820772 100644 > --- a/drivers/soc/qcom/rpmhpd.c > +++ b/drivers/soc/qcom/rpmhpd.c > @@ -649,8 +649,12 @@ static int rpmhpd_power_off(struct generic_pm_domain *domain) > mutex_lock(&rpmhpd_lock); > > ret = rpmhpd_aggregate_corner(pd, 0); > - if (!ret) > - pd->enabled = false; > + if (!ret) { > + if (!pd->state_synced) > + ret = -EBUSY; > + else > + pd->enabled = false; > + } > > mutex_unlock(&rpmhpd_lock); > > @@ -810,10 +814,8 @@ static void rpmhpd_sync_state(struct device *dev) > { > const struct rpmhpd_desc *desc = of_device_get_match_data(dev); > struct rpmhpd **rpmhpds = desc->rpmhpds; > - unsigned int corner; > struct rpmhpd *pd; > unsigned int i; > - int ret; > > mutex_lock(&rpmhpd_lock); > for (i = 0; i < desc->num_pds; i++) { > @@ -822,14 +824,7 @@ static void rpmhpd_sync_state(struct device *dev) > continue; > > pd->state_synced = true; > - if (pd->enabled) > - corner = max(pd->corner, pd->enable_corner); Note that the intent of this line is to lower the corner from max to either a requested performance_state or the lowest non-disabled corner. I don't think your solution maintains this behavior? > - else > - corner = 0; > - > - ret = rpmhpd_aggregate_corner(pd, corner); > - if (ret) > - dev_err(dev, "failed to sync %s\n", pd->res_name); > + pm_genpd_queue_power_off(&pd->pd); In the event that the power-domain has a single device attached, and no subdomains, wouldn't pm_genpd_queue_power_off() pass straight through all checks and turn off the power domain? Perhaps I'm just missing something? Regards, Bjorn > } > mutex_unlock(&rpmhpd_lock); > } > -- > 2.34.1 >
diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c index f20e2a49a669..ec7926820772 100644 --- a/drivers/soc/qcom/rpmhpd.c +++ b/drivers/soc/qcom/rpmhpd.c @@ -649,8 +649,12 @@ static int rpmhpd_power_off(struct generic_pm_domain *domain) mutex_lock(&rpmhpd_lock); ret = rpmhpd_aggregate_corner(pd, 0); - if (!ret) - pd->enabled = false; + if (!ret) { + if (!pd->state_synced) + ret = -EBUSY; + else + pd->enabled = false; + } mutex_unlock(&rpmhpd_lock); @@ -810,10 +814,8 @@ static void rpmhpd_sync_state(struct device *dev) { const struct rpmhpd_desc *desc = of_device_get_match_data(dev); struct rpmhpd **rpmhpds = desc->rpmhpds; - unsigned int corner; struct rpmhpd *pd; unsigned int i; - int ret; mutex_lock(&rpmhpd_lock); for (i = 0; i < desc->num_pds; i++) { @@ -822,14 +824,7 @@ static void rpmhpd_sync_state(struct device *dev) continue; pd->state_synced = true; - if (pd->enabled) - corner = max(pd->corner, pd->enable_corner); - else - corner = 0; - - ret = rpmhpd_aggregate_corner(pd, corner); - if (ret) - dev_err(dev, "failed to sync %s\n", pd->res_name); + pm_genpd_queue_power_off(&pd->pd); } mutex_unlock(&rpmhpd_lock); }