linux-kernel - Re: [PATCH] arm64: dts: qcom: sm8450: Update SNPS Phy parameters for QRD platform

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Message-ID: <6bbd4f08-a165-4e88-94e0-59e744431b3d@quicinc.com>
Date: Thu, 21 Mar 2024 11:47:38 +0530
From: Udipto Goswami <quic_ugoswami@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konrad.dybcio@...aro.org>
CC: <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Rob Herring
	<robh+dt@...nel.org>
Subject: Re: [PATCH] arm64: dts: qcom: sm8450: Update SNPS Phy parameters for
 QRD platform

Hi All,

On 3/19/2024 7:05 PM, Udipto Goswami wrote:
> Update SNPS Phy tuning parameters for sm8450 QRD platform to fix
> electrical compliance failures.
> 
> Signed-off-by: Udipto Goswami <quic_ugoswami@...cinc.com>
> ---
>   arch/arm64/boot/dts/qcom/sm8450-qrd.dts | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450-qrd.dts b/arch/arm64/boot/dts/qcom/sm8450-qrd.dts
> index c7d05945aa51..7b62ead68e77 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450-qrd.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8450-qrd.dts
> @@ -467,6 +467,14 @@
>   	vdda-pll-supply = <&vreg_l5b_0p88>;
>   	vdda18-supply = <&vreg_l1c_1p8>;
>   	vdda33-supply = <&vreg_l2b_3p07>;
> +	qcom,squelch-detector-bp = <(-2090)>;
> +	qcom,hs-disconnect-bp = <1743>;
> +	qcom,pre-emphasis-amplitude-bp = <40000>;
> +	qcom,pre-emphasis-duration-bp = <20000>;
> +	qcom,hs-amplitude-bp = <2000>;
> +	qcom,hs-output-impedance-micro-ohms = <2600000>;
> +	qcom,hs-crossover-voltage-microvolt = <(-31000)>;
> +	qcom,hs-rise-fall-time-bp = <(-4100)>;
>   };
>   
>   &usb_1_qmpphy {

sender and cc list is wrong, please ignore this.
Will send it to the right recipients.

Thanks,
-Udipto