linux-kernel - Re: (subset) [PATCH v5 00/18] clk: qcom: Add support to attach multiple power domains in cc probe

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Message-ID: <0d9846f8-da23-4f2a-a593-35350c026b44@quicinc.com>
Date: Mon, 16 Jun 2025 12:55:47 +0530
From: Jagadeesh Kona <quic_jkona@...cinc.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        "Stephen
 Boyd" <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>,
        Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
        Dmitry Baryshkov <lumag@...nel.org>
CC: Ajit Pandey <quic_ajipan@...cinc.com>,
        Imran Shaik
	<quic_imrashai@...cinc.com>,
        Taniya Das <quic_tdas@...cinc.com>,
        "Satya Priya
 Kakitapalli" <quic_skakitap@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bryan O'Donoghue
	<bryan.odonoghue@...aro.org>,
        Dmitry Baryshkov
	<dmitry.baryshkov@....qualcomm.com>,
        Konrad Dybcio
	<konrad.dybcio@....qualcomm.com>
Subject: Re: (subset) [PATCH v5 00/18] clk: qcom: Add support to attach
 multiple power domains in cc probe



On 6/12/2025 4:22 PM, Krzysztof Kozlowski wrote:
> On 12/06/2025 12:03, Jagadeesh Kona wrote:
>>
>>
>> On 6/12/2025 9:30 AM, Bjorn Andersson wrote:
>>>
>>> On Fri, 30 May 2025 18:50:45 +0530, Jagadeesh Kona wrote:
>>>> In recent QCOM chipsets, PLLs require more than one power domain to be
>>>> kept ON to configure the PLL. But the current code doesn't enable all
>>>> the required power domains while configuring the PLLs, this leads to
>>>> functional issues due to suboptimal settings of PLLs.
>>>>
>>>> To address this, add support for handling runtime power management,
>>>> configuring plls and enabling critical clocks from qcom_cc_really_probe.
>>>> The clock controller can specify PLLs, critical clocks, and runtime PM
>>>> requirements using the descriptor data. The code in qcom_cc_really_probe()
>>>> ensures all necessary power domains are enabled before configuring PLLs
>>>> or critical clocks.
>>>>
>>>> [...]
>>>
>>> Applied, thanks!
>>>
>>> [01/18] dt-bindings: clock: qcom,sm8450-videocc: Add MXC power domain
>>>         commit: 1a42f4d4bb92ea961c58599bac837fb8b377a296
>>> [02/18] dt-bindings: clock: qcom,sm8450-camcc: Allow to specify two power domains
>>>         commit: a02a8f8cb7f6f54b077a6f9eb74ccd840b472416
>>> [03/18] dt-bindings: clock: qcom,sm8450-camcc: Move sc8280xp camcc to sa8775p camcc
>>>         commit: 842fa748291553d2f56410034991d0eb36b70900
>>> [04/18] clk: qcom: clk-alpha-pll: Add support for common PLL configuration function
>>>         commit: 0f698c16358ef300ed28a608368b89a4f6a8623a
>>> [05/18] clk: qcom: common: Handle runtime power management in qcom_cc_really_probe
>>>         commit: c0b6627369bcfec151ccbd091f9ff1cadb1d40c1
>>> [06/18] clk: qcom: common: Add support to configure clk regs in qcom_cc_really_probe
>>>         commit: 452ae64997dd1db1fe9bec2e7bd65b33338e7a6b
>>> [07/18] clk: qcom: videocc-sm8450: Move PLL & clk configuration to really probe
>>>         commit: 512af5bf312efe09698de0870e99c0cec4d13e21
>>> [08/18] clk: qcom: videocc-sm8550: Move PLL & clk configuration to really probe
>>>         commit: a9dc2cc7279a1967f37192a2f954e7111bfa61b7
>>> [09/18] clk: qcom: camcc-sm8450: Move PLL & clk configuration to really probe
>>>         commit: eb65d754eb5eaeab7db87ce7e64dab27b7d156d8
>>> [10/18] clk: qcom: camcc-sm8550: Move PLL & clk configuration to really probe
>>>         commit: adb50c762f3a513a363d91722dbd8d1b4afc5f10
>>> [11/18] clk: qcom: camcc-sm8650: Move PLL & clk configuration to really probe
>>>         commit: 3f8dd231e60b706fc9395edbf0186b7a0756f45d
>>> [12/18] clk: qcom: camcc-x1e80100: Move PLL & clk configuration to really probe
>>>         commit: d7eddaf0ed07e79ffdfd20acb2f6f2ca53e7851b
>>>
>>> Best regards,
>>
>>
>> Hi Bjorn,
>>
>> Thanks for picking these patches. However, the dt-bindings patches are closely linked with
>> the DT patches in this series and needs to be picked together. The dt-bindings changes adds
> 
> DT bindings are the DT patches. What do you mean by DT? DTS? If so, then
> you introduce regressions without explaining this at all in cover letter
> or patches.
> 
>> multiple power domains support for clock controllers, and without the corresponding DT
>> patches, dtbs_check will give warnings.
>>
>> Can you please help to pick DT patches as well?
> 
> Please read soc maintainer profile explaining how DTS is being organized.
> 

I apologize for not mentioning this details in cover letter. Here the dt-bindings documentation
changes(patches 1-3) are only applied and the corresponding DTS changes(patches 13-18) are not
yet applied via DTS tree, leading to dtbs_check warnings.

Thanks,
Jagadeesh

> 
> Best regards,
> Krzysztof