mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Imran Shaik <imran.shaik@oss.qualcomm.com>,
	Bjorn Andersson <andersson@kernel.org>,
	Stephen Boyd <sboyd@kernel.org>,
	Brian Masney <bmasney+clk@redhat.com>,
	Jerome Brunet <jbrunet+clk@baylibre.com>,
	Rob Herring <robh@kernel.org>, Georgi Djakov <djakov@kernel.org>
Cc: Ajit Pandey <ajit.pandey@oss.qualcomm.com>,
	Taniya Das <taniya.das@oss.qualcomm.com>,
	Jagadeesh Kona <jagadeesh.kona@oss.qualcomm.com>,
	Stephen Boyd <sboyd@codeaurora.org>,
	linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] clk: qcom: smd-rpm: Skip proxy votes on clocks for QCM2290
Date: Wed, 21 Oct 2026 13:41:57 +0200	[thread overview]
Message-ID: <1fa61e39-1ef4-42b0-aa9e-ca7dab94c336@oss.qualcomm.com> (raw)
In-Reply-To: <b0a01589-a3ed-4c4c-8222-64131b0e6db1@oss.qualcomm.com>

On 9/24/26 11:32 AM, Imran Shaik wrote:
> 
> 
> On 21-09-2026 02:23 pm, Konrad Dybcio wrote:
>> On 9/16/26 1:05 PM, Imran Shaik wrote:
>>>
>>>
>>> On 11-09-2026 02:36 pm, Konrad Dybcio wrote:
>>>> On 9/10/26 3:44 PM, Imran Shaik wrote:
>>>>> clk_smd_rpm_handoff() votes both active and sleep RPM resource states for
>>>>> every clock, keeping them non-zero until a consumer takes over. If there
>>>>> is no consumer, those clocks will remain active in the idle scenario as
>>>>> well, and the sleep vote is never cleared, blocking XO shutdown.
>>>>>
>>>>> Introduce the skip_clks_handoff flag to handle this on QCM2290 clocks,
>>>>> keeping other targets unaffected.
>>>>>
>>>>> Fixes: 00f64b58874e ("clk: qcom: Add support for SMD-RPM Clocks")
>>>>> Signed-off-by: Imran Shaik <imran.shaik@oss.qualcomm.com>
>>>>> ---
>>>>
>>>> Are you booting with clk_ignore_unused?
>>>>
>>>
>>> No Konrad, clk_ignore_unused is not present.
>>>
>>> Irrespective of clk_ignore_unused, the proxy votes are placed to RPM
>>> during handoff. If no consumer takes over, those votes remain active,
>>> keeping the resource ON in idle and preventing XO shutdown.
>>
>> I re-read this and yeah you're right
>>
>> Is the handoff functionality necessary at all for non-icc clocks?
> 
> Actually, if any consumers surviving on these proxy votes on other
> targets as of today, removing the handoff logic could impact boot-up as
> well. Hence, introduced the skip_clk_handoff flag to maintain backward
> compatibility on other targets.

So is that a "no"?

Konrad

  reply	other threads:[~2026-10-21 11:42 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-10 13:44 Imran Shaik
2026-09-11  9:06 ` Konrad Dybcio
2026-09-16 11:05   ` Imran Shaik
2026-09-21  8:53     ` Konrad Dybcio
2026-09-24  9:32       ` Imran Shaik
2026-10-21 11:41         ` Konrad Dybcio [this message]
2026-10-05 12:35       ` Stephan Gerhold
2026-10-21 11:43         ` Konrad Dybcio

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=1fa61e39-1ef4-42b0-aa9e-ca7dab94c336@oss.qualcomm.com \
    --to=konrad.dybcio@oss.qualcomm.com \
    --cc=ajit.pandey@oss.qualcomm.com \
    --cc=andersson@kernel.org \
    --cc=bmasney+clk@redhat.com \
    --cc=djakov@kernel.org \
    --cc=imran.shaik@oss.qualcomm.com \
    --cc=jagadeesh.kona@oss.qualcomm.com \
    --cc=jbrunet+clk@baylibre.com \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-clk@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=robh@kernel.org \
    --cc=sboyd@codeaurora.org \
    --cc=sboyd@kernel.org \
    --cc=taniya.das@oss.qualcomm.com \
    /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

all inboxes | Powered by JetHome®