From: Saravana Kannan <saravanak@google.com>
To: MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
Stephen Boyd <sboyd@kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Saravana Kannan <saravanak@google.com>,
Sibi Sankar <sibis@codeaurora.org>,
kernel-team@android.com, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 5/5] PM / devfreq: Add required OPPs support to passive governor
Date: Wed, 17 Jul 2019 15:23:40 -0700 [thread overview]
Message-ID: <20190717222340.137578-6-saravanak@google.com> (raw)
In-Reply-To: <20190717222340.137578-1-saravanak@google.com>
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>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.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 58308948b863..24ce94c80f06 100644
--- a/drivers/devfreq/governor_passive.c
+++ b/drivers/devfreq/governor_passive.c
@@ -19,7 +19,7 @@ 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;
/*
@@ -56,13 +56,20 @@ 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
@@ -89,6 +96,9 @@ 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;
}
--
2.22.0.510.g264f2c817a-goog
next prev parent reply other threads:[~2019-07-17 22:24 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-17 22:23 [PATCH v3 0/5] Add required-opps support to devfreq passive gov Saravana Kannan
2019-07-17 22:23 ` [PATCH v3 1/5] OPP: Allow required-opps even if the device doesn't have power-domains Saravana Kannan
2019-07-17 22:23 ` [PATCH v3 2/5] OPP: Add function to look up required OPP's for a given OPP Saravana Kannan
2019-07-23 9:53 ` Viresh Kumar
2019-07-24 0:23 ` Saravana Kannan
2019-07-25 2:58 ` Viresh Kumar
2019-07-25 3:46 ` Saravana Kannan
2019-07-25 5:38 ` Viresh Kumar
2019-07-26 1:41 ` Saravana Kannan
2019-07-17 22:23 ` [PATCH v3 3/5] OPP: Improve require-opps linking Saravana Kannan
2019-07-23 10:28 ` Viresh Kumar
2019-07-23 20:36 ` Saravana Kannan
[not found] ` <CAGETcx-6M9Ts8tfMf6aA8GjMyzK5sOLr069ZCxTG7RHMFPLzHw@mail.gmail.com>
2019-07-25 3:07 ` Viresh Kumar
2019-07-25 4:09 ` Saravana Kannan
2019-07-25 5:17 ` Viresh Kumar
2019-07-26 1:52 ` Saravana Kannan
2019-07-26 21:23 ` Saravana Kannan
2019-07-29 7:26 ` Viresh Kumar
2019-07-30 23:02 ` Hsin-Yi Wang
2019-07-30 23:05 ` Saravana Kannan
2019-11-25 11:28 ` Viresh Kumar
2019-11-25 11:29 ` Viresh Kumar
2019-12-05 19:11 ` Saravana Kannan
2019-12-10 5:21 ` Viresh Kumar
2020-01-27 6:11 ` Viresh Kumar
2020-01-29 13:34 ` Sibi Sankar
2020-01-30 4:21 ` Viresh Kumar
2021-01-18 7:21 ` Hsin-Yi Wang
2021-01-18 7:34 ` Viresh Kumar
2021-01-18 7:39 ` Hsin-Yi Wang
2021-01-20 0:05 ` Saravana Kannan
2021-01-27 11:54 ` Viresh Kumar
2021-01-27 14:40 ` Hsin-Yi Wang
2021-01-28 4:13 ` Viresh Kumar
2021-01-28 5:05 ` Hsin-Yi Wang
2019-07-17 22:23 ` [PATCH v3 4/5] PM / devfreq: Cache OPP table reference in devfreq Saravana Kannan
2019-07-17 22:23 ` Saravana Kannan [this message]
2019-07-23 10:04 ` [PATCH v3 5/5] PM / devfreq: Add required OPPs support to passive governor Viresh Kumar
2019-07-24 0:26 ` Saravana Kannan
2019-07-25 3:01 ` Viresh Kumar
2019-07-25 3:58 ` Saravana Kannan
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