From: Ulf Hansson <ulf.hansson@linaro.org>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Stephan Gerhold <stephan@gerhold.net>,
Stephan Gerhold <stephan.gerhold@kernkonzept.com>,
Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
Stephen Boyd <sboyd@kernel.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
linux-pm@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] OPP: Call dev_pm_opp_set_opp() for required OPPs
Date: Wed, 25 Oct 2023 18:03:30 +0200 [thread overview]
Message-ID: <CAPDyKFrEdHGVeKo0oh0f2uJjtASbg4eye2UbEaE8s3sy+2tWDA@mail.gmail.com> (raw)
In-Reply-To: <20231025152000.vt42gvti2e4rewwc@vireshk-i7>
On Wed, 25 Oct 2023 at 17:20, Viresh Kumar <viresh.kumar@linaro.org> wrote:
>
> On 25-10-23, 14:17, Stephan Gerhold wrote:
> > Thanks, this seems to work fine.
>
> Thanks a lot.
>
> > I found another small problem: In my OPP setup for MSM8916, some of the
> > required-opps point to an OPP with "opp-level = <0>" (see [1], the
> > <&rpmpd_opp_none> in the cpu-opp-table). This is because the vote for
> > the "CX" domain is for the CPU PLL clock source, which is only used for
> > the higher CPU frequencies (>= 998.4 MHz). With the previous code you
> > made it possible for me to vote for opp-level = <0> in commit
> > a5663c9b1e31 ("opp: Allow opp-level to be set to 0", discussion in [2]).
> > I think now it's broken because the _set_opp_level() added by Uffe
> > checks for if (!opp->level) as a sign that there is no opp-level defined
> > at all.
I don't think my patch broke it, I just followed the similar semantics
of how we treated the OPPs for the required opps.
As far as I understood it, the only way we could request the
performance-level to be zero, was if the consumer driver would call
dev_pm_opp_set_opp(dev, NULL);
So, unless I am overlooking something, things can have been screwed up
earlier too?
>
> Yes, we broke that. I think a simple fix is to initialize the level
> with an impossible value, like -1 and then 0 becomes valid.
Yep, make sense, let's fix it!
Are you sending a patch?
[...]
Kind regards
Uffe
next prev parent reply other threads:[~2023-10-25 16:04 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-19 10:21 [RFT PATCH 0/2] OPP: Simplify required-opp handling Viresh Kumar
2023-10-19 10:22 ` [PATCH 1/2] OPP: Use _set_opp_level() for single genpd case Viresh Kumar
2023-10-19 11:16 ` Ulf Hansson
2023-10-20 3:45 ` Viresh Kumar
2023-10-20 10:02 ` Ulf Hansson
2023-10-20 10:56 ` Viresh Kumar
2023-10-20 11:09 ` Ulf Hansson
2023-10-25 6:54 ` Viresh Kumar
2023-10-25 10:40 ` Ulf Hansson
2023-10-25 10:48 ` Viresh Kumar
2023-10-25 13:47 ` Stephan Gerhold
2023-10-25 15:24 ` Viresh Kumar
2023-10-25 16:16 ` Stephan Gerhold
2023-10-26 9:53 ` Ulf Hansson
2023-10-30 10:29 ` Viresh Kumar
2023-11-03 11:58 ` Ulf Hansson
2023-11-06 7:08 ` Viresh Kumar
2023-11-10 13:50 ` Ulf Hansson
2023-11-15 5:32 ` Viresh Kumar
2023-11-16 10:44 ` Viresh Kumar
2023-10-19 10:22 ` [PATCH 2/2] OPP: Call dev_pm_opp_set_opp() for required OPPs Viresh Kumar
2023-10-24 11:18 ` Stephan Gerhold
2023-10-25 7:36 ` Viresh Kumar
2023-10-25 12:17 ` Stephan Gerhold
2023-10-25 15:20 ` Viresh Kumar
2023-10-25 16:03 ` Ulf Hansson [this message]
2023-10-26 7:44 ` Viresh Kumar
2023-10-25 13:51 ` Ulf Hansson
2023-10-25 15:09 ` Viresh Kumar
Reply instructions:
You may reply publicly 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=CAPDyKFrEdHGVeKo0oh0f2uJjtASbg4eye2UbEaE8s3sy+2tWDA@mail.gmail.com \
--to=ulf.hansson@linaro.org \
--cc=konrad.dybcio@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=manivannan.sadhasivam@linaro.org \
--cc=nm@ti.com \
--cc=rafael@kernel.org \
--cc=sboyd@kernel.org \
--cc=stephan.gerhold@kernkonzept.com \
--cc=stephan@gerhold.net \
--cc=vincent.guittot@linaro.org \
--cc=viresh.kumar@linaro.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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).