From: Hsin-Yi Wang <hsinyi@chromium.org>
To: Viresh Kumar <vireshk@kernel.org>, linux-pm@vger.kernel.org
Cc: Nishanth Menon <nm@ti.com>, Stephen Boyd <sboyd@kernel.org>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
linux-kernel@vger.kernel.org,
"MyungJoo Ham )" <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Saravana Kannan <saravanak@google.com>
Subject: [PATCH v5 3/3] PM / devfreq: Add required OPPs support to passive governor
Date: Wed, 3 Feb 2021 17:24:00 +0800 [thread overview]
Message-ID: <20210203092400.1791884-4-hsinyi@chromium.org> (raw)
In-Reply-To: <20210203092400.1791884-1-hsinyi@chromium.org>
From: Saravana Kannan <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>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
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 63332e4a65ae8..8d92b1964f9c3 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_required_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;
}
--
2.30.0.365.g02bc693789-goog
next prev parent reply other threads:[~2021-02-03 9:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20210203092602epcas1p1550c96a2ed1b0b6d0a0f9f750cb76e45@epcas1p1.samsung.com>
2021-02-03 9:23 ` [PATCH v5 0/3] Add required-opps support to devfreq passive gov Hsin-Yi Wang
2021-02-03 9:23 ` [PATCH v5 1/3] OPP: Add function to look up required OPP's for a given OPP Hsin-Yi Wang
2021-02-04 5:46 ` Viresh Kumar
2021-02-03 9:23 ` [PATCH v5 2/3] PM / devfreq: Cache OPP table reference in devfreq Hsin-Yi Wang
2021-02-03 9:24 ` Hsin-Yi Wang [this message]
2021-02-04 2:49 ` [PATCH v5 3/3] PM / devfreq: Add required OPPs support to passive governor Viresh Kumar
2021-02-04 7:07 ` Hsin-Yi Wang
2021-02-03 10:12 ` [PATCH v5 0/3] Add required-opps support to devfreq passive gov Chanwoo Choi
2021-02-04 5:41 ` Viresh Kumar
2021-02-04 8:12 ` Hsin-Yi Wang
2021-02-04 8:53 ` Chanwoo Choi
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