linux-kernel - Re: [PATCH 3/3] arm64: dts: qcom: sm8550: Add missing RPMhPD OPP levels

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Date:   Wed, 17 May 2023 15:25:53 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] arm64: dts: qcom: sm8550: Add missing RPMhPD OPP
 levels



On 17.05.2023 15:25, Dmitry Baryshkov wrote:
> On Wed, 17 May 2023 at 16:20, Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>>
>> We need more granularity for things like the GPU. Add the missing levels.
>>
>> This unfortunately requires some re-indexing, resulting in an ugly diff.
>>
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>> ---
>>  arch/arm64/boot/dts/qcom/sm8550.dtsi | 36 ++++++++++++++++++++++++++++--------
>>  1 file changed, 28 insertions(+), 8 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
>> index 6e9bad8f6f33..0c987dd4e4e5 100644
>> --- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
>> @@ -3616,35 +3616,55 @@ rpmhpd_opp_min_svs: opp2 {
>>                                                 opp-level = <RPMH_REGULATOR_LEVEL_MIN_SVS>;
>>                                         };
>>
>> -                                       rpmhpd_opp_low_svs: opp3 {
>> +                                       rpmhpd_opp_lov_svs_d2: opp3 {
>> +                                               opp-level = <RPMH_REGULATOR_LEVEL_LOW_SVS_D2>;
>> +                                       };
>>
> 
> Maybe we should stop using the indices for OPP entries and switch to
> encoding levels instead?
I think we should just retire this and register a hardcoded OPP table
in the .c driver.

Konrad
>