LKML Archive on lore.kernel.org
 help / color / Atom feed
From: Sibi Sankar <sibis@codeaurora.org>
To: Saravana Kannan <saravanak@google.com>,
	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: kernel-team@android.com, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org, adharmap@codeaurora.org
Subject: Re: [PATCH v2 3/4] PM / devfreq: Cache OPP table reference in devfreq
Date: Tue, 16 Jul 2019 23:06:22 +0530
Message-ID: <e9c9b150-43a6-dc6b-5d88-21608120e940@codeaurora.org> (raw)
In-Reply-To: <20190625213337.157525-4-saravanak@google.com>

Hey Saravana,

On 6/26/19 3:03 AM, Saravana Kannan wrote:
> The OPP table can be used often in devfreq. Trying to get it each time can
> be expensive, so cache it in the devfreq struct.
> 
> Signed-off-by: Saravana Kannan <saravanak@google.com>
> ---
>   drivers/devfreq/devfreq.c | 6 ++++++
>   include/linux/devfreq.h   | 1 +
>   2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index 6b6991f0e873..ac62b78dc035 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -597,6 +597,8 @@ static void devfreq_dev_release(struct device *dev)
>   	if (devfreq->profile->exit)
>   		devfreq->profile->exit(devfreq->dev.parent);
>   
> +	if (devfreq->opp_table)
> +		dev_pm_opp_put_opp_table(devfreq->opp_table);
>   	mutex_destroy(&devfreq->lock);
>   	kfree(devfreq);
>   }
> @@ -677,6 +679,10 @@ struct devfreq *devfreq_add_device(struct device *dev,
>   	devfreq->max_freq = devfreq->scaling_max_freq;
>   
>   	devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev);
> +	devfreq->opp_table = dev_pm_opp_get_opp_table(dev);
> +	if (IS_ERR(devfreq->opp_table))
> +		devfreq->opp_table = NULL;
> +
>   	atomic_set(&devfreq->suspend_count, 0);
>   
>   	dev_set_name(&devfreq->dev, "devfreq%d",
> diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
> index fbffa74bfc1b..0d877c9513d7 100644
> --- a/include/linux/devfreq.h
> +++ b/include/linux/devfreq.h
> @@ -156,6 +156,7 @@ struct devfreq {
>   	struct devfreq_dev_profile *profile;
>   	const struct devfreq_governor *governor;
>   	char governor_name[DEVFREQ_NAME_LEN];
> +	struct opp_table *opp_table;

please add it to the function docs as well

>   	struct notifier_block nb;
>   	struct delayed_work work;
>   
> 

-- 
Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc, is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-25 21:33 [PATCH v2 0/4] Add required-opps support to devfreq passive gov Saravana Kannan
2019-06-25 21:33 ` [PATCH v2 1/4] OPP: Allow required-opps even if the device doesn't have power-domains Saravana Kannan
2019-07-16 15:14   ` Sibi Sankar
2019-07-16 17:17   ` Sibi Sankar
2019-07-16 18:54     ` Saravana Kannan
2019-06-25 21:33 ` [PATCH v2 2/4] OPP: Add function to look up required OPP's for a given OPP Saravana Kannan
2019-06-25 21:33 ` [PATCH v2 3/4] PM / devfreq: Cache OPP table reference in devfreq Saravana Kannan
2019-06-26  1:57   ` Chanwoo Choi
2019-07-16 17:36   ` Sibi Sankar [this message]
2019-07-16 19:12     ` Saravana Kannan
2019-06-25 21:33 ` [PATCH v2 4/4] PM / devfreq: Add required OPPs support to passive governor Saravana Kannan
2019-06-26  1:59   ` Chanwoo Choi
     [not found] ` <CGME20190625213355epcas5p3805e632818ee999a91e48ef9a610a084@epcms1p4>
2019-06-26  1:30   ` [PATCH v2 3/4] PM / devfreq: Cache OPP table reference in devfreq MyungJoo Ham
     [not found] ` <CGME20190625213358epcas4p2391bcf70b54646880cbb60eae8b73acf@epcms1p1>
2019-06-26  1:31   ` [PATCH v2 4/4] PM / devfreq: Add required OPPs support to passive governor MyungJoo Ham

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=e9c9b150-43a6-dc6b-5d88-21608120e940@codeaurora.org \
    --to=sibis@codeaurora.org \
    --cc=adharmap@codeaurora.org \
    --cc=cw00.choi@samsung.com \
    --cc=kernel-team@android.com \
    --cc=kyungmin.park@samsung.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=myungjoo.ham@samsung.com \
    --cc=nm@ti.com \
    --cc=rjw@rjwysocki.net \
    --cc=saravanak@google.com \
    --cc=sboyd@kernel.org \
    --cc=vireshk@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org linux-kernel@archiver.kernel.org
	public-inbox-index lkml


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/ public-inbox