dt-bindings: msm: disp: add yaml schemas for QCM2290 DPU bindings

QCM2290 MSM Mobile Display Subsystem (MDSS) encapsulates sub-blocks
like DPU display controller, DSI etc. Add YAML schema for DPU device
tree bindings
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/474091/
Link: https://lore.kernel.org/r/1644852547-10067-2-git-send-email-loic.poulain@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Documentation/devicetree/bindings/display/msm/dpu-qcm2290.yaml

+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/msm/dpu-qcm2290.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Display DPU dt properties for QCM2290 target
+
+maintainers:
+  - Loic Poulain <loic.poulain@linaro.org>
+
+description: |
+  Device tree bindings for MSM Mobile Display Subsystem(MDSS) that encapsulates
+  sub-blocks like DPU display controller and DSI. Device tree bindings of MDSS
+  and DPU are mentioned for QCM2290 target.
+
+properties:
+  compatible:
+    items:
+      - const: qcom,qcm2290-mdss
+
+  reg:
+    maxItems: 1
+
+  reg-names:
+    const: mdss
+
+  power-domains:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Display AHB clock from gcc
+      - description: Display AXI clock
+      - description: Display core clock
+
+  clock-names:
+    items:
+      - const: iface
+      - const: bus
+      - const: core
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  "#address-cells": true
+
+  "#size-cells": true
+
+  "#interrupt-cells":
+    const: 1
+
+  iommus:
+    items:
+      - description: Phandle to apps_smmu node with SID mask for Hard-Fail port0
+      - description: Phandle to apps_smmu node with SID mask for Hard-Fail port1
+
+  ranges: true
+
+  interconnects:
+    items:
+      - description: Interconnect path specifying the port ids for data bus
+
+  interconnect-names:
+    const: mdp0-mem
+
+patternProperties:
+  "^display-controller@[0-9a-f]+$":
+    type: object
+    description: Node containing the properties of DPU.
+
+    properties:
+      compatible:
+        items:
+          - const: qcom,qcm2290-dpu
+
+      reg:
+        items:
+          - description: Address offset and size for mdp register set
+          - description: Address offset and size for vbif register set
+
+      reg-names:
+        items:
+          - const: mdp
+          - const: vbif
+
+      clocks:
+        items:
+          - description: Display AXI clock from gcc
+          - description: Display AHB clock from dispcc
+          - description: Display core clock from dispcc
+          - description: Display lut clock from dispcc
+          - description: Display vsync clock from dispcc
+
+      clock-names:
+        items:
+          - const: bus
+          - const: iface
+          - const: core
+          - const: lut
+          - const: vsync
+
+      interrupts:
+        maxItems: 1
+
+      power-domains:
+        maxItems: 1
+
+      operating-points-v2: true
+
+      ports:
+        $ref: /schemas/graph.yaml#/properties/ports
+        description: |
+          Contains the list of output ports from DPU device. These ports
+          connect to interfaces that are external to the DPU hardware,
+          such as DSI. Each output port contains an endpoint that
+          describes how it is connected to an external interface.
+
+        properties:
+          port@0:
+            $ref: /schemas/graph.yaml#/properties/port
+            description: DPU_INTF1 (DSI1)
+
+        required:
+          - port@0
+
+    required:
+      - compatible
+      - reg
+      - reg-names
+      - clocks
+      - interrupts
+      - power-domains
+      - operating-points-v2
+      - ports
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - power-domains
+  - clocks
+  - interrupts
+  - interrupt-controller
+  - iommus
+  - ranges
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,dispcc-qcm2290.h>
+    #include <dt-bindings/clock/qcom,gcc-qcm2290.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interconnect/qcom,qcm2290.h>
+    #include <dt-bindings/power/qcom-rpmpd.h>
+
+    mdss: mdss@5e00000 {
+        #address-cells = <1>;
+        #size-cells = <1>;
+        compatible = "qcom,qcm2290-mdss", "qcom,mdss";
+        reg = <0x05e00000 0x1000>;
+        reg-names = "mdss";
+        power-domains = <&dispcc MDSS_GDSC>;
+        clocks = <&gcc GCC_DISP_AHB_CLK>,
+                 <&gcc GCC_DISP_HF_AXI_CLK>,
+                 <&dispcc DISP_CC_MDSS_MDP_CLK>;
+        clock-names = "iface", "bus", "core";
+
+        interrupts = <GIC_SPI 186 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-controller;
+        #interrupt-cells = <1>;
+
+        interconnects = <&mmrt_virt MASTER_MDP0 &bimc SLAVE_EBI1>;
+        interconnect-names = "mdp0-mem";
+
+        iommus = <&apps_smmu 0x420 0x2>,
+                 <&apps_smmu 0x421 0x0>;
+        ranges;
+
+        mdss_mdp: mdp@5e01000 {
+                compatible = "qcom,qcm2290-dpu";
+                reg = <0x05e01000 0x8f000>,
+                      <0x05eb0000 0x2008>;
+                reg-names = "mdp", "vbif";
+
+                clocks = <&gcc GCC_DISP_HF_AXI_CLK>,
+                         <&dispcc DISP_CC_MDSS_AHB_CLK>,
+                         <&dispcc DISP_CC_MDSS_MDP_CLK>,
+                         <&dispcc DISP_CC_MDSS_MDP_LUT_CLK>,
+                         <&dispcc DISP_CC_MDSS_VSYNC_CLK>;
+                clock-names = "bus", "iface", "core", "lut", "vsync";
+
+                operating-points-v2 = <&mdp_opp_table>;
+                power-domains = <&rpmpd QCM2290_VDDCX>;
+
+                interrupt-parent = <&mdss>;
+                interrupts = <0 IRQ_TYPE_NONE>;
+
+                ports {
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+
+                        port@0 {
+                                reg = <0>;
+                                dpu_intf1_out: endpoint {
+                                        remote-endpoint = <&dsi0_in>;
+                                };
+                        };
+                 };
+         };
+...