linux-kernel - Re: [PATCH] PM: devfreq: init performance/powersave governor

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Date:	Sun, 29 Apr 2012 23:09:36 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	myungjoo.ham@...sung.com
Cc:	Xiaoguang Chen <chenxg@...vell.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"khilman@...com" <khilman@...com>,
	박경민 <kyungmin.park@...sung.com>,
	"mturquette@...com" <mturquette@...com>
Subject: Re: [PATCH] PM: devfreq: init performance/powersave governor

On Friday, April 27, 2012, MyungJoo Ham wrote:
> > Performance and powersave governor's get_target_freq
> > is not called if driver chooses one of these two governors.
> > Add init function in governor profile to call update_devfreq
> > which will call get_target_freq subsequently.
> > 
> > Signed-off-by: Xiaoguang Chen <chenxg@...vell.com>
> Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>

Applied to linux-pm/linux-next.

Thanks,
Rafael


> Hello Xiaoguang,
> 
> 
> Yes, if we do not call any QoS, min/max, OPP interfaces or enable polling, we need to call this at init. In fact, this is a bugfix patch.
> 
> Thank you!
> 
> Cheers!
> MyungJoo.
> 
> 
> 
> > ---
> >  drivers/devfreq/governor_performance.c |    7 +++++++
> >  drivers/devfreq/governor_powersave.c   |    7 +++++++
> >  2 files changed, 14 insertions(+), 0 deletions(-)
> > 
> > diff --git a/drivers/devfreq/governor_performance.c b/drivers/devfreq/governor_performance.c
> > index 574a06b..af75ddd 100644
> > --- a/drivers/devfreq/governor_performance.c
> > +++ b/drivers/devfreq/governor_performance.c
> > @@ -10,6 +10,7 @@
> >   */
> >  
> >  #include <linux/devfreq.h>
> > +#include "governor.h"
> >  
> >  static int devfreq_performance_func(struct devfreq *df,
> >  				    unsigned long *freq)
> > @@ -25,8 +26,14 @@ static int devfreq_performance_func(struct devfreq *df,
> >  	return 0;
> >  }
> >  
> > +static int performance_init(struct devfreq *devfreq)
> > +{
> > +	return update_devfreq(devfreq);
> > +}
> > +
> >  const struct devfreq_governor devfreq_performance = {
> >  	.name = "performance",
> > +	.init = performance_init,
> >  	.get_target_freq = devfreq_performance_func,
> >  	.no_central_polling = true,
> >  };
> > diff --git a/drivers/devfreq/governor_powersave.c b/drivers/devfreq/governor_powersave.c
> > index d742d4a..fec0cdb 100644
> > --- a/drivers/devfreq/governor_powersave.c
> > +++ b/drivers/devfreq/governor_powersave.c
> > @@ -10,6 +10,7 @@
> >   */
> >  
> >  #include <linux/devfreq.h>
> > +#include "governor.h"
> >  
> >  static int devfreq_powersave_func(struct devfreq *df,
> >  				  unsigned long *freq)
> > @@ -22,8 +23,14 @@ static int devfreq_powersave_func(struct devfreq *df,
> >  	return 0;
> >  }
> >  
> > +static int powersave_init(struct devfreq *devfreq)
> > +{
> > +	return update_devfreq(devfreq);
> > +}
> > +
> >  const struct devfreq_governor devfreq_powersave = {
> >  	.name = "powersave",
> > +	.init = powersave_init,
> >  	.get_target_freq = devfreq_powersave_func,
> >  	.no_central_polling = true,
> >  };
> 

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