Re: [PATCH 3/4] arm64: dts: qcom: msm8996: Improve GPU OPP table

[Dmitry Baryshkov]

On Wed, 29 Mar 2023 at 22:17, Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> wrote:
>
> Remove the self-explanatory comment about opp-supported-hw contents,
> add required-opps to ensure reasonable power domain levels are voted
> for (currently we've been piggybacking off of miracles and MDP votes)
> and add newlines between each subnode.

I'm not sure this is 100% correct. The values that you add are correct
for the voltage scaling case. However, based on the vendor kernel
sources I think that MX should only be scaled if the voltage is scaled
too. I might be wrong here.

>
> Fixes: 69cc3114ab0f ("arm64: dts: Add Adreno GPU definitions")
> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/qcom/msm8996.dtsi | 18 +++++++++++++-----
>  1 file changed, 13 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi
> index 4dd37f72e018..62ad30e94f40 100644
> --- a/arch/arm64/boot/dts/qcom/msm8996.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi
> @@ -1244,37 +1244,45 @@ gpu: gpu@b00000 {
>                         gpu_opp_table: opp-table {
>                                 compatible = "operating-points-v2";
>
> -                               /*
> -                                * 624Mhz is only available on speed bins 0 and 3.
> -                                * 560Mhz is only available on speed bins 0, 2 and 3.
> -                                * All the rest are available on all bins of the hardware.
> -                                */
>                                 opp-624000000 {
>                                         opp-hz = /bits/ 64 <624000000>;
> +                                       required-opps = <&rpmpd_opp_turbo>;
>                                         opp-supported-hw = <0x09>;
>                                 };
> +
>                                 opp-560000000 {
>                                         opp-hz = /bits/ 64 <560000000>;
> +                                       required-opps = <&rpmpd_opp_turbo>;
>                                         opp-supported-hw = <0x0d>;
>                                 };
> +
>                                 opp-510000000 {
>                                         opp-hz = /bits/ 64 <510000000>;
> +                                       required-opps = <&rpmpd_opp_nom>;
>                                         opp-supported-hw = <0xff>;
>                                 };
> +
>                                 opp-401800000 {
>                                         opp-hz = /bits/ 64 <401800000>;
> +                                       required-opps = <&rpmpd_opp_nom>;
>                                         opp-supported-hw = <0xff>;
>                                 };
> +
>                                 opp-315000000 {
>                                         opp-hz = /bits/ 64 <315000000>;
> +                                       required-opps = <&rpmpd_opp_svs>;
>                                         opp-supported-hw = <0xff>;
>                                 };
> +
>                                 opp-214000000 {
>                                         opp-hz = /bits/ 64 <214000000>;
> +                                       required-opps = <&rpmpd_opp_svs>;
>                                         opp-supported-hw = <0xff>;
>                                 };
> +
>                                 opp-133000000 {
>                                         opp-hz = /bits/ 64 <133000000>;
> +                                       required-opps = <&rpmpd_opp_svs>;
>                                         opp-supported-hw = <0xff>;
>                                 };
>                         };
>
> --
> 2.40.0
>


-- 
With best wishes
Dmitry