linux-kernel - Re: [PATCH] arm64: dts: qcom: qcs9075-iq-9075-evk: Enable Display Port

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Message-ID: <iayioqm3tqutbjswt24p65o4demfdaqcakfbwohnaqueuuqtng@azhxjno4ofia>
Date: Fri, 11 Jul 2025 14:05:07 -0500
From: Bjorn Andersson <andersson@...nel.org>
To: Prahlad Valluru <venkata.valluru@....qualcomm.com>
Cc: Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Shashank Maurya <quic_ssmaurya@...cinc.com>
Subject: Re: [PATCH] arm64: dts: qcom: qcs9075-iq-9075-evk: Enable Display
 Port

On Fri, Jul 11, 2025 at 09:13:47PM +0530, Prahlad Valluru wrote:
> From: Shashank Maurya <quic_ssmaurya@...cinc.com>
> 
> Enable DPTX0 and DPTX1 along with their corresponding PHYs for
> qcs9075-iq-9075-evk platform.

I prefer that you actually describe what these are connected to. I
presume there will be more DPTX instances enabled for this board? If
that's the case, let's mention here that this is just a subset.

> 
> Signed-off-by: Shashank Maurya <quic_ssmaurya@...cinc.com>
> Signed-off-by: Prahlad Valluru <venkata.valluru@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/qcs9075-iq-9075-evk.dts | 52 ++++++++++++++++++++++++

Please wait with resubmitting this patch until the base dtsi has landed
(with its new name).

>  1 file changed, 52 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs9075-iq-9075-evk.dts b/arch/arm64/boot/dts/qcom/qcs9075-iq-9075-evk.dts
> index ab161180d1d5a670a68c0903e85f24a91faa2b71..110e08db3ad82e3aa88aa4c4ed4b2beb607385ad 100644
> --- a/arch/arm64/boot/dts/qcom/qcs9075-iq-9075-evk.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs9075-iq-9075-evk.dts
> @@ -252,6 +252,44 @@ vreg_l8e: ldo8 {
>  	};
>  };
>  
> +&mdss0 {
> +	status = "okay";
> +};
> +
> +&mdss0_dp0 {
> +	status = "okay";

status last please.

> +	pinctrl-0 = <&dp0_hot_plug_det>;
> +	pinctrl-names = "default";

I prefer that you actually describe the connectors, like I did on
sa8295p-adp. In particular if there's a bunch of connectors on this
board.

Regards,
Bjorn

> +};
> +
> +&mdss0_dp0_out {
> +	data-lanes = <0 1 2 3>;
> +	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
> +};
> +
> +&mdss0_dp0_phy {
> +	status = "okay";
> +	vdda-phy-supply = <&vreg_l1c>;
> +	vdda-pll-supply = <&vreg_l4a>;
> +};
> +
> +&mdss0_dp1 {
> +	status = "okay";
> +	pinctrl-0 = <&dp1_hot_plug_det>;
> +	pinctrl-names = "default";
> +};
> +
> +&mdss0_dp1_out {
> +	data-lanes = <0 1 2 3>;
> +	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
> +};
> +
> +&mdss0_dp1_phy {
> +	status = "okay";
> +	vdda-phy-supply = <&vreg_l1c>;
> +	vdda-pll-supply = <&vreg_l4a>;
> +};
> +
>  &qupv3_id_1 {
>  	status = "okay";
>  };
> @@ -260,6 +298,20 @@ &sleep_clk {
>  	clock-frequency = <32768>;
>  };
>  
> +&tlmm {
> +	dp0_hot_plug_det: dp0-hot-plug-det-state {
> +		pins = "gpio101";
> +		function = "edp0_hot";
> +		bias-disable;
> +	};
> +
> +	dp1_hot_plug_det: dp1-hot-plug-det-state {
> +		pins = "gpio102";
> +		function = "edp1_hot";
> +		bias-disable;
> +	};
> +};
> +
>  &uart10 {
>  	compatible = "qcom,geni-debug-uart";
>  	pinctrl-0 = <&qup_uart10_default>;
> 
> ---
> base-commit: 7f3a635117b377cb90b67757cb46de12ce8aa24e
> change-id: 20250711-enable-iq9-dp-addc9c7195c9
> prerequisite-message-id: <20250612155437.146925-1-quic_wasimn@...cinc.com>
> prerequisite-patch-id: 22eee78c5507c3105e0c74d1128b3db803879d7a
> prerequisite-patch-id: cf52fc82e606ab87458339f71596ca31253e91ee
> prerequisite-patch-id: 3617ce3b1790bc5b8e50dca6c3ae482759dcc684
> 
> Best regards,
> -- 
> Prahlad Valluru <venkata.valluru@....qualcomm.com>
>