| Message ID | 1551878926-8455-3-git-send-email-aisheng.dong@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | PM / Domains: Support enter deepest state during suspend and probe failure | expand |
On Wed, 6 Mar 2019 at 14:35, Aisheng Dong <aisheng.dong@nxp.com> wrote: > > For a domain has no working devices anymore, let's choose the deepest state > to enter to save power. e.g. driver probe failure. > > Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> > --- > drivers/base/power/domain.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c > index 847a69e..d3f57c2 100644 > --- a/drivers/base/power/domain.c > +++ b/drivers/base/power/domain.c > @@ -550,6 +550,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, > if (!genpd->gov) > genpd->state_idx = 0; > > + /* Choose the deepest state if no devices using this domain */ > + if (!genpd->device_count) > + genpd->state_idx = genpd->state_count - 1; > + This doesn't work, sorry. For example, there may be a sub-domain with devices in it and which have constraints applicable also for the master (current) domain. > /* > * If sd_count > 0 at this point, one of the subdomains hasn't > * managed to call genpd_power_on() for the master yet after > -- > 2.7.4 > Kind regards Uffe
> From: Ulf Hansson [mailto:ulf.hansson@linaro.org] > Sent: Wednesday, March 6, 2019 11:11 PM > On Wed, 6 Mar 2019 at 14:35, Aisheng Dong <aisheng.dong@nxp.com> > wrote: > > > > For a domain has no working devices anymore, let's choose the deepest > > state to enter to save power. e.g. driver probe failure. > > > > Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> > > --- > > drivers/base/power/domain.c | 4 ++++ > > 1 file changed, 4 insertions(+) > > > > diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c > > index 847a69e..d3f57c2 100644 > > --- a/drivers/base/power/domain.c > > +++ b/drivers/base/power/domain.c > > @@ -550,6 +550,10 @@ static int genpd_power_off(struct > generic_pm_domain *genpd, bool one_dev_on, > > if (!genpd->gov) > > genpd->state_idx = 0; > > > > + /* Choose the deepest state if no devices using this domain */ > > + if (!genpd->device_count) > > + genpd->state_idx = genpd->state_count - 1; > > + > > This doesn't work, sorry. > > For example, there may be a sub-domain with devices in it and which have > constraints applicable also for the master (current) domain. Okay, got your point. Then how about make it for no governor case only? Regards Dong Aisheng > > > /* > > * If sd_count > 0 at this point, one of the subdomains hasn't > > * managed to call genpd_power_on() for the master yet after > > -- > > 2.7.4 > > > > Kind regards > Uffe
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 847a69e..d3f57c2 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -550,6 +550,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, if (!genpd->gov) genpd->state_idx = 0; + /* Choose the deepest state if no devices using this domain */ + if (!genpd->device_count) + genpd->state_idx = genpd->state_count - 1; + /* * If sd_count > 0 at this point, one of the subdomains hasn't * managed to call genpd_power_on() for the master yet after
For a domain has no working devices anymore, let's choose the deepest state to enter to save power. e.g. driver probe failure. Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> --- drivers/base/power/domain.c | 4 ++++ 1 file changed, 4 insertions(+)