From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Stephen Boyd <swboyd@chromium.org>
Cc: Andy Gross <agross@kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Rajendra Nayak <rnayak@codeaurora.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] soc: qcom: rpmhpd: Use corner in power_off
Date: Wed, 7 Jul 2021 23:35:52 -0500 [thread overview]
Message-ID: <YOaAqAqldq3Hyiva@yoga> (raw)
In-Reply-To: <CAE-0n50EvG4qV0n+Ag+dvFxKKasnUzwH=MA+f-jsgDdBqaqziQ@mail.gmail.com>
On Wed 07 Jul 19:21 CDT 2021, Stephen Boyd wrote:
> Quoting Bjorn Andersson (2021-07-02 17:54:15)
> > rpmhpd_aggregate_corner() takes a corner as parameter, but in
> > rpmhpd_power_off() the code requests the level of the first corner
> > instead.
> >
> > In all (known) current cases the first corner has level 0, so this
> > change should be a nop, but in case that there's a power domain with a
> > non-zero lowest level this makes sure that rpmhpd_power_off() actually
> > requests the lowest level - which is the closest to "power off" we can
> > get.
> >
> > While touching the code, also skip the unnecessary zero-initialization
> > of "ret".
> >
> > Fixes: 279b7e8a62cc ("soc: qcom: rpmhpd: Add RPMh power domain driver")
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> > ---
>
> I think this is why qcom folks talk about "virtual corner" and "physical
> corner" because there's the one in command DB and the one in hardware.
I think the driver uses "level" and "corner" to denote the two different
number spaces, so I think we're good...now that we after this patch
don't pass a "level" as "corner" during power_off ;)
> Maybe we should change rpmhpd_aggregate_corner() to call the argument
> 'vcorner'?
So "virtual corner" is "corner" and "physical corner" is level? I.e. 256
is a "physical corner"?
Or did you get the suggestion backwards?
> Unfortunately we can't really build a type system here to
> make this problem easy to catch with a mismatched type, unless there's
> some sort of typedef trick we can play?
>
s/i/corner/ in rpmhpd_set_performance_state() would further enforce the
naming scheme used and reduce the risk for future confusion.
But we did just squash the final bug... ;)
> Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Thanks,
Bjorn
next prev parent reply other threads:[~2021-07-08 4:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-03 0:54 [PATCH 0/2] soc: qcom: rpmhpd: Improve rpmhpd enable handling Bjorn Andersson
2021-07-03 0:54 ` [PATCH 1/2] soc: qcom: rpmhpd: Use corner in power_off Bjorn Andersson
2021-07-05 4:26 ` Rajendra Nayak
2021-07-05 5:06 ` Bjorn Andersson
2021-07-05 5:40 ` Rajendra Nayak
2021-07-07 4:49 ` Bjorn Andersson
2021-07-07 6:31 ` Rajendra Nayak
2021-07-07 15:48 ` Bjorn Andersson
2021-07-07 16:58 ` Dmitry Baryshkov
2021-07-08 0:21 ` Stephen Boyd
2021-07-08 4:35 ` Bjorn Andersson [this message]
2021-07-08 5:03 ` Rajendra Nayak
2021-07-08 6:51 ` Stephen Boyd
2021-07-15 10:40 ` Sibi Sankar
2021-07-03 0:54 ` [PATCH 2/2] soc: qcom: rpmhpd: Make power_on actually enable the domain Bjorn Andersson
2021-07-03 2:54 ` [RESEND PATCH " Bjorn Andersson
2021-07-08 0:23 ` Stephen Boyd
2021-07-08 0:25 ` Stephen Boyd
2021-07-14 9:22 ` Rajendra Nayak
2021-07-15 12:16 ` Sibi Sankar
2021-07-15 12:24 ` Rajendra Nayak
2021-08-12 13:21 ` Dmitry Baryshkov
2021-08-13 9:45 ` Ulf Hansson
2021-07-05 12:55 ` [PATCH 0/2] soc: qcom: rpmhpd: Improve rpmhpd enable handling Ulf Hansson
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=YOaAqAqldq3Hyiva@yoga \
--to=bjorn.andersson@linaro.org \
--cc=agross@kernel.org \
--cc=dmitry.baryshkov@linaro.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rnayak@codeaurora.org \
--cc=swboyd@chromium.org \
--cc=ulf.hansson@linaro.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).