Re: [PATCH] arm64: dts: qcom: sc8280xp: Vote for CX in USB controllers

[Konrad Dybcio]

On 12.01.2023 14:51, Bjorn Andersson wrote:
> Running GCC_USB30_*_MASTER_CLK at 200MHz requires CX at nominal level,
> not doing so results in occasional lockups. This was previously hidden
> by the fact that the display stack incorrectly voted for CX (instead of
> MMCX).
> 
> Fixes: 152d1faf1e2f ("arm64: dts: qcom: add SC8280XP platform")
> Signed-off-by: Bjorn Andersson <quic_bjorande@xxxxxxxxxxx>
> ---https://git.codelinaro.org/clo/la/kernel/msm-5.4/-/blob/LV.AU.1.2.3.r1-03600-gen3meta.0/drivers/clk/qcom/gcc-direwolf.c#L2703-2725

Maybe in the future there could be some power savings for lower freqs..

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

Konrad
>  arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> index 2ed17baf50d3..4f4353f84cba 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> @@ -2265,6 +2265,7 @@ usb_0: usb@a6f8800 {
>  					  "ss_phy_irq";
>  
>  			power-domains = <&gcc USB30_PRIM_GDSC>;
> +			required-opps = <&rpmhpd_opp_nom>;
>  
>  			resets = <&gcc GCC_USB30_PRIM_BCR>;
>  
> @@ -2319,6 +2320,7 @@ usb_1: usb@a8f8800 {
>  					  "ss_phy_irq";
>  
>  			power-domains = <&gcc USB30_SEC_GDSC>;
> +			required-opps = <&rpmhpd_opp_nom>;
>  
>  			resets = <&gcc GCC_USB30_SEC_BCR>;
>