linux-kernel - Re: [PATCH v2 3/3] arm64: dts: qcom: sm8750-mtp: Add eusb2 repeater tuning parameters

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Message-ID: <6cd71896-9dc2-490e-acf0-4acffe571612@oss.qualcomm.com>
Date: Sat, 6 Dec 2025 21:39:51 +0530
From: Krishna Kurapati <krishna.kurapati@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Luca Weiss
 <luca.weiss@...rphone.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Johan Hovold <johan+linaro@...nel.org>,
        Pengyu Luo <mitltlatltl@...il.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] arm64: dts: qcom: sm8750-mtp: Add eusb2 repeater
 tuning parameters



On 12/5/2025 7:03 PM, Konrad Dybcio wrote:
> On 12/4/25 5:46 AM, Krishna Kurapati wrote:
>> Add eusb2 repeater tuning parameters for MTP platform.
>>
>> Signed-off-by: Krishna Kurapati <krishna.kurapati@....qualcomm.com>
>> ---
>>   arch/arm64/boot/dts/qcom/sm8750-mtp.dts | 4 ++++
>>   1 file changed, 4 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sm8750-mtp.dts b/arch/arm64/boot/dts/qcom/sm8750-mtp.dts
>> index c8cb521b4c26..b9a4d1c99816 100644
>> --- a/arch/arm64/boot/dts/qcom/sm8750-mtp.dts
>> +++ b/arch/arm64/boot/dts/qcom/sm8750-mtp.dts
>> @@ -1041,6 +1041,10 @@ wifi@0 {
>>   &pmih0108_eusb2_repeater {
>>   	status = "okay";
>>   
>> +	qcom,tune-usb2-preem = /bits/ 8 <0x3>;
>> +	qcom,tune-usb2-amplitude = /bits/ 8 <0xa>;
>> +	qcom,squelch-detector-bp = <(-2000)>;
> 
> This happens to be the only(?) node in this file that has status first
> instead of last. May I ask you to fix that up, since it's even visible
> in the diff?
> 
> Also, does the QRD also need a similar update?
> 

Will fix it up in next revision.

And for QRD, I don't see any updated override params in qrd downstream.

Regards,
Krishna,

> Konrad
> 
>> +
>>   	vdd18-supply = <&vreg_l15b_1p8>;
>>   	vdd3-supply = <&vreg_l5b_3p1>;
>>   };