| Message ID | 20190625213337.157525-5-saravanak@google.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Delegated to: | viresh kumar |
| Headers | show |
| Series | Add required-opps support to devfreq passive gov | expand |
>Look at the required OPPs of the "parent" device to determine the OPP that >is required from the slave device managed by the passive governor. This >allows having mappings between a parent device and a slave device even when >they don't have the same number of OPPs. > >Signed-off-by: Saravana Kannan <saravanak@google.com> >--- > drivers/devfreq/governor_passive.c | 20 +++++++++++++++----- > 1 file changed, 15 insertions(+), 5 deletions(-) Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Cheers, MyungJoo
Hi Saravana, On 19. 6. 26. 오전 6:33, Saravana Kannan wrote: > Look at the required OPPs of the "parent" device to determine the OPP that > is required from the slave device managed by the passive governor. This > allows having mappings between a parent device and a slave device even when > they don't have the same number of OPPs. > > Signed-off-by: Saravana Kannan <saravanak@google.com> > --- > drivers/devfreq/governor_passive.c | 20 +++++++++++++++----- > 1 file changed, 15 insertions(+), 5 deletions(-) > > diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c > index 3bc29acbd54e..f6de03de7a64 100644 > --- a/drivers/devfreq/governor_passive.c > +++ b/drivers/devfreq/governor_passive.c > @@ -22,7 +22,7 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq, > = (struct devfreq_passive_data *)devfreq->data; > struct devfreq *parent_devfreq = (struct devfreq *)p_data->parent; > unsigned long child_freq = ULONG_MAX; > - struct dev_pm_opp *opp; > + struct dev_pm_opp *opp = NULL, *p_opp = NULL; > int i, count, ret = 0; > > /* > @@ -59,13 +59,20 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq, > * list of parent device. Because in this case, *freq is temporary > * value which is decided by ondemand governor. > */ > - opp = devfreq_recommended_opp(parent_devfreq->dev.parent, freq, 0); > - if (IS_ERR(opp)) { > - ret = PTR_ERR(opp); > + p_opp = devfreq_recommended_opp(parent_devfreq->dev.parent, freq, 0); > + if (IS_ERR(p_opp)) { > + ret = PTR_ERR(p_opp); > goto out; > } > > - dev_pm_opp_put(opp); > + if (devfreq->opp_table && parent_devfreq->opp_table) > + opp = dev_pm_opp_xlate_opp(parent_devfreq->opp_table, > + devfreq->opp_table, p_opp); > + if (opp) { > + *freq = dev_pm_opp_get_freq(opp); > + dev_pm_opp_put(opp); > + goto out; > + } > > /* > * Get the OPP table's index of decided freqeuncy by governor > @@ -92,6 +99,9 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq, > *freq = child_freq; > > out: > + if (!IS_ERR_OR_NULL(opp)) > + dev_pm_opp_put(p_opp); > + > return ret; > } > > I agree this approach. It is necessary. Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c index 3bc29acbd54e..f6de03de7a64 100644 --- a/drivers/devfreq/governor_passive.c +++ b/drivers/devfreq/governor_passive.c @@ -22,7 +22,7 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq, = (struct devfreq_passive_data *)devfreq->data; struct devfreq *parent_devfreq = (struct devfreq *)p_data->parent; unsigned long child_freq = ULONG_MAX; - struct dev_pm_opp *opp; + struct dev_pm_opp *opp = NULL, *p_opp = NULL; int i, count, ret = 0; /* @@ -59,13 +59,20 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq, * list of parent device. Because in this case, *freq is temporary * value which is decided by ondemand governor. */ - opp = devfreq_recommended_opp(parent_devfreq->dev.parent, freq, 0); - if (IS_ERR(opp)) { - ret = PTR_ERR(opp); + p_opp = devfreq_recommended_opp(parent_devfreq->dev.parent, freq, 0); + if (IS_ERR(p_opp)) { + ret = PTR_ERR(p_opp); goto out; } - dev_pm_opp_put(opp); + if (devfreq->opp_table && parent_devfreq->opp_table) + opp = dev_pm_opp_xlate_opp(parent_devfreq->opp_table, + devfreq->opp_table, p_opp); + if (opp) { + *freq = dev_pm_opp_get_freq(opp); + dev_pm_opp_put(opp); + goto out; + } /* * Get the OPP table's index of decided freqeuncy by governor @@ -92,6 +99,9 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq, *freq = child_freq; out: + if (!IS_ERR_OR_NULL(opp)) + dev_pm_opp_put(p_opp); + return ret; }
Look at the required OPPs of the "parent" device to determine the OPP that is required from the slave device managed by the passive governor. This allows having mappings between a parent device and a slave device even when they don't have the same number of OPPs. Signed-off-by: Saravana Kannan <saravanak@google.com> --- drivers/devfreq/governor_passive.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-)