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

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Message-ID: <ff574ebe-041b-44f0-8335-6bfa332d8077@oss.qualcomm.com>
Date: Thu, 6 Feb 2025 12:42:56 +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 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?

Konrad