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PM / Domains: Save OPP table pointer in genpd

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dev_pm_genpd_set_performance_state() will be required to call
dev_pm_opp_xlate_performance_state() going forward to translate from
performance state of a sub-domain to performance state of its master.
And dev_pm_opp_xlate_performance_state() needs pointers to the OPP
tables of both genpd and its master.

Lets fetch and save them while the OPP tables are added. Fetching the
OPP tables should never fail as we just added the OPP tables and so add
a WARN_ON() for such a bug instead of full error paths.

Tested-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar
2018-11-02 11:18:08 +05:30
parent 2feb5a896c
commit 1067ae3e42
2 changed files with 23 additions and 2 deletions
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23
drivers/base/power/domain.c
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@@ -1896,12 +1896,21 @@ int of_genpd_add_provider_simple(struct device_node *np,
ret);
goto unlock;
}
/*
* Save table for faster processing while setting performance
* state.
*/
genpd->opp_table = dev_pm_opp_get_opp_table(&genpd->dev);
WARN_ON(!genpd->opp_table);
}
ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
if (ret) {
if (genpd->set_performance_state)
if (genpd->set_performance_state) {
dev_pm_opp_put_opp_table(genpd->opp_table);
dev_pm_opp_of_remove_table(&genpd->dev);
}
goto unlock;
}
@@ -1954,6 +1963,13 @@ int of_genpd_add_provider_onecell(struct device_node *np,
i, ret);
goto error;
}
/*
* Save table for faster processing while setting
* performance state.
*/
genpd->opp_table = dev_pm_opp_get_opp_table_indexed(&genpd->dev, i);
WARN_ON(!genpd->opp_table);
}
genpd->provider = &np->fwnode;
@@ -1978,8 +1994,10 @@ error:
genpd->provider = NULL;
genpd->has_provider = false;
if (genpd->set_performance_state)
if (genpd->set_performance_state) {
dev_pm_opp_put_opp_table(genpd->opp_table);
dev_pm_opp_of_remove_table(&genpd->dev);
}
}
mutex_unlock(&gpd_list_lock);
@@ -2013,6 +2031,7 @@ void of_genpd_del_provider(struct device_node *np)
if (!gpd->set_performance_state)
continue;
dev_pm_opp_put_opp_table(gpd->opp_table);
dev_pm_opp_of_remove_table(&gpd->dev);
}
}