linux-kernel - Re: [PATCH v5 6/6] arm64: dts: qcom: x1e80100-t14s: Enable external DisplayPort support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZzOKylgU3teUNuAe@linaro.org>
Date: Tue, 12 Nov 2024 19:05:14 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.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>
Cc: Rajendra Nayak <quic_rjendra@...cinc.com>,
	Sibi Sankar <quic_sibis@...cinc.com>,
	Johan Hovold <johan@...nel.org>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Trilok Soni <quic_tsoni@...cinc.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v5 6/6] arm64: dts: qcom: x1e80100-t14s: Enable external
 DisplayPort support

On 24-11-12 19:01:15, Abel Vesa wrote:
> The Lenovo ThinkPad T14s Gen6 provides external DisplayPort on all
> 2 USB Type-C ports. Each one of this ports is connected to a dedicated
> DisplayPort controller.
> 
> Due to support missing in the USB/DisplayPort combo PHY driver,
> the external DisplayPort is limited to 2 lanes.
> 
> So enable the first and second DisplayPort controllers and limit their
> data lanes number to 2.
> 
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>

Please do not merge this specific patch.

It is provided just for context and testing purposes.

See the cover note for more details.

> ---
>  .../boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts      | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
> index ea3ecc7c5bda24f3a0a7bb027b456462b11daf4d..b08a173f0cfe2a2fc241a4e689d35b5e7e03d7e1 100644
> --- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
> +++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
> @@ -746,6 +746,22 @@ &mdss {
>  	status = "okay";
>  };
>  
> +&mdss_dp0 {
> +	status = "okay";
> +};
> +
> +&mdss_dp0_out {
> +	data-lanes = <0 1>;
> +};
> +
> +&mdss_dp1 {
> +	status = "okay";
> +};
> +
> +&mdss_dp1_out {
> +	data-lanes = <0 1>;
> +};
> +
>  &mdss_dp3 {
>  	compatible = "qcom,x1e80100-dp";
>  	/delete-property/ #sound-dai-cells;
> 
> -- 
> 2.34.1
>