linux-kernel - Re: [PATCH] arm64: dts: qcom: qcs6490-rb3gen2: Use 'edp

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Message-ID: <1398b513-0948-4775-a71d-dd06ee2296f9@oss.qualcomm.com>
Date: Fri, 31 Oct 2025 10:07:56 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Amit Singh <quic_amitsi@...cinc.com>, andersson@...nel.org,
        konradybcio@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_riteshk@...cinc.com,
        quic_rajeevny@...cinc.com, quic_vproddut@...cinc.com
Subject: Re: [PATCH] arm64: dts: qcom: qcs6490-rb3gen2: Use 'edp_hot' function
 for hpd gpio

On 10/31/25 9:57 AM, Amit Singh wrote:
> Currently, hpd gpio is configured as a general-purpose gpio, which does
> not support interrupt generation. This change removes the generic
> hpd-gpios property and assigns the edp_hot function to the pin,
> enabling proper irq support.
> 
> Fixes: 756efb7cb7293 ("arm64: dts: qcom: qcs6490-rb3gen2: Add DP output")
> Signed-off-by: Amit Singh <quic_amitsi@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> index c146161e4bb4..caa0b6784df3 100644
> --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> @@ -49,8 +49,6 @@ dp-connector {
>  		label = "DP";
>  		type = "mini";
>  
> -		hpd-gpios = <&tlmm 60 GPIO_ACTIVE_HIGH>;

I think this change will take away DRM_BRIDGE_OP_DETECT which is very
much desired to have.. (via display_connector_probe())

Konrad

> -
>  		port {
>  			dp_connector_in: endpoint {
>  				remote-endpoint = <&mdss_edp_out>;
> @@ -1420,7 +1418,6 @@ &wifi {
>  /* PINCTRL - ADDITIONS TO NODES IN PARENT DEVICE TREE FILES */
>  
>  &edp_hot_plug_det {
> -	function = "gpio";
>  	bias-disable;
>  };
>