linux-kernel - Re: [PATCH 7/7] ARM: dts: qcom: msm8226: Add mdss nodes

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Date:   Mon, 29 May 2023 14:10:13 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Luca Weiss <luca@...tu.xyz>, ~postmarketos/upstreaming@...ts.sr.ht,
        phone-devel@...r.kernel.org, Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/7] ARM: dts: qcom: msm8226: Add mdss nodes



On 29.05.2023 11:44, Luca Weiss wrote:
> Add the nodes that describe the mdss so that display can work on
> MSM8226.
> 
> Signed-off-by: Luca Weiss <luca@...tu.xyz>
> ---
>  arch/arm/boot/dts/qcom-msm8226.dtsi | 118 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 118 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/qcom-msm8226.dtsi b/arch/arm/boot/dts/qcom-msm8226.dtsi
> index 42acb9ddb8cc..182d6405032f 100644
> --- a/arch/arm/boot/dts/qcom-msm8226.dtsi
> +++ b/arch/arm/boot/dts/qcom-msm8226.dtsi
> @@ -636,6 +636,124 @@ smd-edge {
>  				label = "lpass";
>  			};
>  		};
> +
> +		mdss: display-subsystem@...00000 {
> +			compatible = "qcom,mdss";
> +			reg = <0xfd900000 0x100>, <0xfd924000 0x1000>;
> +			reg-names = "mdss_phys", "vbif_phys";
> +
> +			power-domains = <&mmcc MDSS_GDSC>;
> +
> +			clocks = <&mmcc MDSS_AHB_CLK>,
> +				 <&mmcc MDSS_AXI_CLK>,
> +				 <&mmcc MDSS_VSYNC_CLK>;
> +			clock-names = "iface", "bus", "vsync";
One per line, please

> +
> +			interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
> +
> +			interrupt-controller;
> +			#interrupt-cells = <1>;
We're not using the irq cell, is that necessary/should that be 0?

> +
> +			status = "disabled";
status should go last

> +
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			ranges;
> +
> +			mdp: display-controller@...00000 {
> +				compatible = "qcom,msm8226-mdp5", "qcom,mdp5";
> +				reg = <0xfd900100 0x22000>;
> +				reg-names = "mdp_phys";
> +
> +				interrupt-parent = <&mdss>;
> +				interrupts = <0>;
> +
> +				clocks = <&mmcc MDSS_AHB_CLK>,
> +					 <&mmcc MDSS_AXI_CLK>,
> +					 <&mmcc MDSS_MDP_CLK>,
> +					 <&mmcc MDSS_VSYNC_CLK>;
> +				clock-names = "iface", "bus", "core", "vsync";
One per line, please

> +
> +				ports {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
Would port { work here? I remember one mdss component's bindings
didn't allow it but don't recall which one

> +
> +					port@0 {
> +						reg = <0>;
> +						mdp5_intf1_out: endpoint {
> +							remote-endpoint = <&dsi0_in>;
> +						};
> +					};
> +				};
> +			};
> +
> +			dsi0: dsi@...22800 {
> +				compatible = "qcom,msm8226-dsi-ctrl",
> +					     "qcom,mdss-dsi-ctrl";
> +				reg = <0xfd922800 0x1f8>;
> +				reg-names = "dsi_ctrl";
> +
> +				interrupt-parent = <&mdss>;
> +				interrupts = <4>;
> +
> +				assigned-clocks = <&mmcc BYTE0_CLK_SRC>, <&mmcc PCLK0_CLK_SRC>;
> +				assigned-clock-parents = <&dsi_phy0 0>, <&dsi_phy0 1>;
One per line, please

> +
> +				clocks = <&mmcc MDSS_MDP_CLK>,
> +					 <&mmcc MDSS_AHB_CLK>,
> +					 <&mmcc MDSS_AXI_CLK>,
> +					 <&mmcc MDSS_BYTE0_CLK>,
> +					 <&mmcc MDSS_PCLK0_CLK>,
> +					 <&mmcc MDSS_ESC0_CLK>,
> +					 <&mmcc MMSS_MISC_AHB_CLK>;
> +				clock-names = "mdp_core",
> +					      "iface",
> +					      "bus",
> +					      "byte",
> +					      "pixel",
> +					      "core",
> +					      "core_mmss";
> +
> +				phys = <&dsi_phy0>;
> +
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				ports {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					port@0 {
> +						reg = <0>;
> +						dsi0_in: endpoint {
> +							remote-endpoint = <&mdp5_intf1_out>;
> +						};
> +					};
> +
> +					port@1 {
> +						reg = <1>;
> +						dsi0_out: endpoint {
> +						};
> +					};
> +				};
> +			};
> +
> +			dsi_phy0: phy@...22a00 {
> +				compatible = "qcom,dsi-phy-28nm-8226";
> +				reg = <0xfd922a00 0xd4>,
> +				      <0xfd922b00 0x280>,
> +				      <0xfd922d80 0x30>;
> +				reg-names = "dsi_pll",
> +					    "dsi_phy",
> +					    "dsi_phy_regulator";
> +
> +				#clock-cells = <1>;
> +				#phy-cells = <0>;
> +
> +				clocks = <&mmcc MDSS_AHB_CLK>, <&rpmcc RPM_SMD_XO_CLK_SRC>;
One per line, please

Konrad
> +				clock-names = "iface", "ref";
> +			};
> +		};
>  	};
>  
>  	timer {
>