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Subject[PATCH v2 5/8] PM / devfreq: Get the available next frequency on update_devfreq()
Date
The update_devfreq() considers only user frequency (min_freq/max_freq)
and the next target_freq provided by the governor. But, The commit
a76caf55e5b35 ("thermal: Add devfreq cooling") is able to disable
OPP as a cooling device. In result, the update_devfreq() have to
consider the 'opp->available' status in order to decicde the next freq
by the devfreq_recommended_opp().

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
drivers/devfreq/devfreq.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 1c4b377cacfb..3b9662ffe603 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -255,6 +255,7 @@ static int devfreq_notify_transition(struct devfreq *devfreq,
int update_devfreq(struct devfreq *devfreq)
{
struct devfreq_freqs freqs;
+ struct dev_pm_opp *opp;
unsigned long freq, cur_freq;
int err = 0;
u32 flags = 0;
@@ -273,7 +274,7 @@ int update_devfreq(struct devfreq *devfreq)
return err;

/*
- * Adjust the frequency with user freq and QoS.
+ * Adjust the frequency with user freq, QoS and available freq.
*
* List from the highest priority
* max_freq
@@ -289,6 +290,12 @@ int update_devfreq(struct devfreq *devfreq)
flags |= DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use LUB */
}

+ opp = devfreq_recommended_opp(devfreq->dev.parent, &freq, flags);
+ if (IS_ERR(opp))
+ return PTR_ERR(opp);
+ freq = dev_pm_opp_get_freq(opp);
+ dev_pm_opp_put(opp);
+
if (devfreq->profile->get_cur_freq)
devfreq->profile->get_cur_freq(devfreq->dev.parent, &cur_freq);
else
--
1.9.1
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