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

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On 29/05/2023 15:10, Konrad Dybcio wrote:


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@xxxxxxxxx>
---
  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@fd900000 {
+			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?

No. With 0 it would mean that there is a single interrupt for mdss source, which clearly is not the case.


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

+
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges;
+
+			mdp: display-controller@fd900000 {
+				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

Let's use ports /port@0 for uniformity even if there is just a single port always.


+
+					port@0 {
+						reg = <0>;
+						mdp5_intf1_out: endpoint {
+							remote-endpoint = <&dsi0_in>;
+						};
+					};
+				};
+			};
+--
With best wishes
Dmitry




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