linux-kernel - Re: [PATCH v2 1/2] arm64: dts: qcom: qcs615: Add clock nodes for multimedia clock

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Message-ID: <437d8b8f-540e-42f6-8656-859a9ad9af12@oss.qualcomm.com>
Date: Mon, 10 Feb 2025 17:27:38 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Taniya Das <quic_tdas@...cinc.com>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: Ajit Pandey <quic_ajipan@...cinc.com>,
        Imran Shaik <quic_imrashai@...cinc.com>,
        Jagadeesh Kona <quic_jkona@...cinc.com>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] arm64: dts: qcom: qcs615: Add clock nodes for
 multimedia clock

On 10.02.2025 10:33 AM, Taniya Das wrote:
> 
> 
> On 2/6/2025 5:12 PM, Konrad Dybcio wrote:
>> On 4.02.2025 6:33 PM, Taniya Das wrote:
>>>
>>>
>>> On 2/3/2025 7:44 PM, Konrad Dybcio wrote:
>>>> On 19.01.2025 1:00 PM, Taniya Das wrote:
>>>>> Add support for video, camera, display and gpu clock controller nodes
>>>>> for QCS615 platform.
>>>>>
>>>>> Signed-off-by: Taniya Das <quic_tdas@...cinc.com>
>>>>> ---
>>>>>    arch/arm64/boot/dts/qcom/qcs615.dtsi | 51 ++++++++++++++++++++++++++++++++++++
>>>>>    1 file changed, 51 insertions(+)
>>>>>
>>>>> diff --git a/arch/arm64/boot/dts/qcom/qcs615.dtsi b/arch/arm64/boot/dts/qcom/qcs615.dtsi
>>>>> index f4abfad474ea62dea13d05eb874530947e1e8d3e..9d537019437c5202c4d398eecd0ce2a991083175 100644
>>>>> --- a/arch/arm64/boot/dts/qcom/qcs615.dtsi
>>>>> +++ b/arch/arm64/boot/dts/qcom/qcs615.dtsi
>>>>> @@ -3,7 +3,11 @@
>>>>>     * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved.
>>>>>     */
>>>>>    +#include <dt-bindings/clock/qcom,qcs615-camcc.h>
>>>>> +#include <dt-bindings/clock/qcom,qcs615-dispcc.h>
>>>>>    #include <dt-bindings/clock/qcom,qcs615-gcc.h>
>>>>> +#include <dt-bindings/clock/qcom,qcs615-gpucc.h>
>>>>> +#include <dt-bindings/clock/qcom,qcs615-videocc.h>
>>>>>    #include <dt-bindings/clock/qcom,rpmh.h>
>>>>>    #include <dt-bindings/dma/qcom-gpi.h>
>>>>>    #include <dt-bindings/interconnect/qcom,icc.h>
>>>>> @@ -1418,6 +1422,18 @@ data-pins {
>>>>>                };
>>>>>            };
>>>>>    +        gpucc: clock-controller@...0000 {
>>>>> +            compatible = "qcom,qcs615-gpucc";
>>>>> +            reg = <0 0x05090000 0 0x9000>;
>>>>> +
>>>>> +            clocks = <&rpmhcc RPMH_CXO_CLK>,
>>>>> +                 <&gcc GPLL0>;
>>>>
>>>> This would normally be GCC_GPU_GPLL0_(DIV_)CLK_SRC, is this intentional?
>>>>
>>>
>>> Yes, Konard, but on QCS615 GPLL0 is connected and not the GCC_GPU_GPLL0 sources.
>>
>> It looks like you're right.. if I'm looking in the right place, the _GPU_ ones
>> are not connected anywhere..
>>
>> It also seems like the reset state of the _GPU_ ones is OFF (as expected),
>> should we remove them from the GCC driver to reduce confusion?
>>
> 
> Yeah I understand it might confuse, but I would like to keep them as the code will match the clocks present in the hardware.

Alright, let's just keep that as is

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad