linux-kernel - Re: [PATCH v4] arm64: dts: qcom: qcs6490-rb3gen2: enable hdmi bridge

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Date: Tue, 28 May 2024 18:00:26 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Venkata Prahlad Valluru <quic_vvalluru@...cinc.com>
Cc: andersson@...nel.org, conor+dt@...nel.org, devicetree@...r.kernel.org, 
	konrad.dybcio@...aro.org, krzysztof.kozlowski+dt@...aro.org, linux-arm-msm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, quic_abhinavk@...cinc.com, quic_nankam@...cinc.com, 
	robh@...nel.org
Subject: Re: [PATCH v4] arm64: dts: qcom: qcs6490-rb3gen2: enable hdmi bridge

On Tue, May 28, 2024 at 07:49:54PM +0530, Venkata Prahlad Valluru wrote:
> Rb3Gen2 has a lt9611uxc DSI-to-HDMI bridge on i2c0, with
> reset gpio from pm7250b gpio2 and irq gpio from tlmm gpio24.
> Bridge supplies are Vdd connected to input supply directly
> and vcc to L11c. Enable HDMI output, bridge and corresponding
> DSI output.
> 
> Signed-off-by: Venkata Prahlad Valluru <quic_vvalluru@...cinc.com>
> ---
> v4: added fixed regulator for vdd

Please don't send new iterations as replies to the previous iteration.
It might be ignored or mishandled by the tools.

> 
> v3: - Updated commit text
>     - Arranged nodes in alphabetical order
>     - Fixed signoff
>     - Fixed drive strength for lt9611_irq_pin
>     - Removed 'label' from hdmi-connector, which is optional
> 
> v2: Addressed dtschema errors
> 	- Fixed lt9611-irq
> 	- vdd-supply error to be ignored, as it is connected to
> 	  input supply directly, on rb3gen2
> ---
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 94 ++++++++++++++++++++
>  1 file changed, 94 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> index a085ff5b5fb2..7f00fca131a2 100644
> --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> @@ -52,6 +52,25 @@
>  		};
>  	};
>  
> +	hdmi-connector {
> +		compatible = "hdmi-connector";
> +		type = "a";
> +
> +		port {
> +			hdmi_con: endpoint {
> +				remote-endpoint = <&lt9611_out>;
> +			};
> +		};
> +	};
> +
> +	lt9611_1v2: lt9611-vdd12-regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "LT9611_1V2";

Is it the regulator / net name in schematics? Or is it also used by any
other consumers?

> +
> +		regulator-min-microvolt = <1200000>;
> +		regulator-max-microvolt = <1200000>;
> +	};
> +
>  	reserved-memory {
>  		xbl_mem: xbl@...00000 {
>  			reg = <0x0 0x80700000 0x0 0x100000>;
> @@ -530,6 +549,46 @@
>  			   <GCC_WPSS_RSCP_CLK>;
>  };
>  
> +&i2c0 {
> +	clock-frequency = <400000>;
> +	status = "okay";
> +
> +	lt9611_codec: hdmi-bridge@2b {
> +		compatible = "lontium,lt9611uxc";
> +		reg = <0x2b>;
> +
> +		interrupts-extended = <&tlmm 24 IRQ_TYPE_EDGE_FALLING>;
> +		reset-gpios = <&pm7250b_gpios 2 GPIO_ACTIVE_HIGH>;
> +
> +		vdd-supply = <&lt9611_1v2>;
> +		vcc-supply = <&vreg_l11c_2p8>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&lt9611_irq_pin &lt9611_rst_pin>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +
> +				lt9611_a: endpoint {
> +					remote-endpoint = <&mdss_dsi0_out>;
> +				};
> +			};
> +
> +			port@2 {
> +				reg = <2>;
> +
> +				lt9611_out: endpoint {
> +					remote-endpoint = <&hdmi_con>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
>  &i2c1 {
>  	status = "okay";
>  
> @@ -587,6 +646,21 @@
>  	remote-endpoint = <&usb_dp_qmpphy_dp_in>;
>  };
>  
> +&mdss_dsi {
> +	vdda-supply = <&vreg_l6b_1p2>;
> +	status = "okay";
> +};
> +
> +&mdss_dsi0_out {
> +	remote-endpoint = <&lt9611_a>;
> +	data-lanes = <0 1 2 3>;
> +};
> +
> +&mdss_dsi_phy {
> +	vdds-supply = <&vreg_l10c_0p88>;
> +	status = "okay";
> +};
> +
>  &mdss_edp {
>  	status = "okay";
>  };
> @@ -711,3 +785,23 @@
>  	function = "gpio";
>  	bias-disable;
>  };
> +
> +&pm7250b_gpios {
> +	lt9611_rst_pin: lt9611-rst-state {
> +		pins = "gpio2";
> +		function = "normal";
> +
> +		output-high;
> +		input-disable;
> +		power-source = <0>;
> +	};
> +};
> +
> +&tlmm {
> +	lt9611_irq_pin: lt9611-irq-state {
> +		pins = "gpio24";
> +		function = "gpio";
> +		drive-strength = <2>;
> +		bias-disable;
> +	};
> +};
> -- 
> 2.17.1
> 

-- 
With best wishes
Dmitry