Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
# Copyright 2019 Texas Instruments Incorporated
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/ti/ti,am65x-dss.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Texas Instruments AM65x Display Subsystem

maintainers:
  - Jyri Sarha <jsarha@ti.com>
  - Tomi Valkeinen <tomi.valkeinen@ti.com>

description: |
  The AM625 and AM65x TI Keystone Display SubSystem with two output
  ports and two video planes. In AM65x DSS, the first video port
  supports 1 OLDI TX and in AM625 DSS, the first video port output is
  internally routed to 2 OLDI TXes. The second video port supports DPI
  format. The first plane is full video plane with all features and the
  second is a "lite plane" without scaling support.

properties:
  compatible:
    enum:
      - ti,am625-dss
      - ti,am62a7,dss
      - ti,am65x-dss

  reg:
    description:
      Addresses to each DSS memory region described in the SoC's TRM.
    items:
      - description: common DSS register area
      - description: VIDL1 light video plane
      - description: VID video plane
      - description: OVR1 overlay manager for vp1
      - description: OVR2 overlay manager for vp2
      - description: VP1 video port 1
      - description: VP2 video port 2

  reg-names:
    items:
      - const: common
      - const: vidl1
      - const: vid
      - const: ovr1
      - const: ovr2
      - const: vp1
      - const: vp2

  clocks:
    items:
      - description: fck DSS functional clock
      - description: vp1 Video Port 1 pixel clock
      - description: vp2 Video Port 2 pixel clock

  clock-names:
    items:
      - const: fck
      - const: vp1
      - const: vp2

  assigned-clocks:
    minItems: 1
    maxItems: 3

  assigned-clock-parents:
    minItems: 1
    maxItems: 3

  interrupts:
    maxItems: 1

  power-domains:
    maxItems: 1
    description: phandle to the associated power domain

  dma-coherent:
    type: boolean

  ports:
    $ref: /schemas/graph.yaml#/properties/ports

    properties:
      port@0:
        $ref: /schemas/graph.yaml#/properties/port
        description:
          For AM65x DSS, the OLDI output port node from video port 1.
          For AM625 DSS, the internal DPI output port node from video
          port 1.
          For AM62A7 DSS, the port is tied off inside the SoC.

      port@1:
        $ref: /schemas/graph.yaml#/properties/port
        description:
          The DSS DPI output port node from video port 2

  ti,am65x-oldi-io-ctrl:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      phandle to syscon device node mapping OLDI IO_CTRL registers.
      The mapped range should point to OLDI_DAT0_IO_CTRL, map it and
      following OLDI_DAT1_IO_CTRL, OLDI_DAT2_IO_CTRL, OLDI_DAT3_IO_CTRL,
      and OLDI_CLK_IO_CTRL registers. This property is needed for OLDI
      interface to work.

  max-memory-bandwidth:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      Input memory (from main memory to dispc) bandwidth limit in
      bytes per second

allOf:
  - if:
      properties:
        compatible:
          contains:
            const: ti,am62a7-dss
    then:
      properties:
        ports:
          properties:
            port@0: false

required:
  - compatible
  - reg
  - reg-names
  - clocks
  - clock-names
  - interrupts
  - ports

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>
    #include <dt-bindings/soc/ti,sci_pm_domain.h>

    dss: dss@4a00000 {
            compatible = "ti,am65x-dss";
            reg =   <0x04a00000 0x1000>, /* common */
                    <0x04a02000 0x1000>, /* vidl1 */
                    <0x04a06000 0x1000>, /* vid */
                    <0x04a07000 0x1000>, /* ovr1 */
                    <0x04a08000 0x1000>, /* ovr2 */
                    <0x04a0a000 0x1000>, /* vp1 */
                    <0x04a0b000 0x1000>; /* vp2 */
            reg-names = "common", "vidl1", "vid",
                    "ovr1", "ovr2", "vp1", "vp2";
            ti,am65x-oldi-io-ctrl = <&dss_oldi_io_ctrl>;
            power-domains = <&k3_pds 67 TI_SCI_PD_EXCLUSIVE>;
            clocks =        <&k3_clks 67 1>,
                            <&k3_clks 216 1>,
                            <&k3_clks 67 2>;
            clock-names = "fck", "vp1", "vp2";
            interrupts = <GIC_SPI 166 IRQ_TYPE_EDGE_RISING>;
            ports {
                    #address-cells = <1>;
                    #size-cells = <0>;
                    port@0 {
                            reg = <0>;
                            oldi_out0: endpoint {
                                    remote-endpoint = <&lcd_in0>;
                            };
                    };
            };
    };