linux-kernel - Re: [PATCH 1/2] arm64: dts: qcom: x1e80100-crd: Enable external DP support

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Message-ID: <29c63407-d32a-4afd-ac92-498bf5855359@kernel.org>
Date: Mon, 2 Sep 2024 22:05:10 +0200
From: Konrad Dybcio <konradybcio@...nel.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Abel Vesa <abel.vesa@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Johan Hovold <johan@...nel.org>,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Trilok Soni <quic_tsoni@...cinc.com>, linux-arm-msm@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] arm64: dts: qcom: x1e80100-crd: Enable external DP
 support

On 2.09.2024 8:54 PM, Dmitry Baryshkov wrote:
> On Mon, Sep 02, 2024 at 06:01:35PM GMT, Abel Vesa wrote:
>> The Qualcomm Snapdragon X Elite CRD board has 3 USB Type-C ports,
>> all of them supporting external DP altmode. Between each QMP
>> combo PHY and the corresponding Type-C port, sits one Parade PS8830
>> retimer which handles both orientation and SBU muxing. Add nodes for
>> each retimer, fix the graphs between connectors and the PHYs accordingly,
>> add the voltage regulators needed by each retimer and then enable all
>> 3 remaining DPUs.
>>
>> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
>> ---

[...]

> 
>> @@ -1164,7 +1566,7 @@ &usb_1_ss0_dwc3_hs {
>>  };
>>  
>>  &usb_1_ss0_qmpphy_out {
>> -	remote-endpoint = <&pmic_glink_ss0_ss_in>;
>> +	remote-endpoint = <&retimer_ss0_ss_in>;
>>  };
> 
> orientation-switch

https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux.git/commit/?h=for-next&id=17c5909f53e01c151c91f66949a9c4f191756bae

> and mode-switch for the QMP PHY?

Oops! Looks like adding it and fixing some bugs in the qmpphy driver makes
usb+dp work every now and then..

Konrad