xref: /openbmc/linux/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml (revision 8a1e6bb3)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/samsung/samsung,exynos7-decon.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Samsung Exynos7 SoC Display and Enhancement Controller (DECON)

maintainers:
  - Inki Dae <inki.dae@samsung.com>
  - Joonyoung Shim <jy0922.shim@samsung.com>
  - Seung-Woo Kim <sw0312.kim@samsung.com>
  - Kyungmin Park <kyungmin.park@samsung.com>
  - Krzysztof Kozlowski <krzk@kernel.org>

description: |
  DECON (Display and Enhancement Controller) is the Display Controller for the
  Exynos7 series of SoCs which transfers the image data from a video memory
  buffer to an external LCD interface.

properties:
  compatible:
    const: samsung,exynos7-decon

  clocks:
    minItems: 4
    maxItems: 4

  clock-names:
    items:
      - const: pclk_decon0
      - const: aclk_decon0
      - const: decon0_eclk
      - const: decon0_vclk

  display-timings:
    $ref: ../panel/display-timings.yaml#

  i80-if-timings:
    type: object
    description: timing configuration for lcd i80 interface support
    properties:
      cs-setup:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Clock cycles for the active period of address signal is enabled until
          chip select is enabled.
        default: 0

      wr-active:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Clock cycles for the active period of CS is enabled.
        default: 1

      wr-hold:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Clock cycles for the active period of CS is disabled until write
          signal is disabled.
        default: 0

      wr-setup:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Clock cycles for the active period of CS signal is enabled until
          write signal is enabled.
        default: 0

  interrupts:
    items:
      - description: FIFO level
      - description: VSYNC
      - description: LCD system

  interrupt-names:
    items:
      - const: fifo
      - const: vsync
      - const: lcd_sys

  power-domains:
    maxItems: 1

  reg:
    maxItems: 1

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

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/exynos7-clk.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    display-controller@13930000 {
        compatible = "samsung,exynos7-decon";
        reg = <0x13930000 0x1000>;
        interrupt-names = "fifo", "vsync", "lcd_sys";
        interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 188 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&clock_disp 100>, /* PCLK_DECON_INT */
                 <&clock_disp 101>, /* ACLK_DECON_INT */
                 <&clock_disp 102>, /* SCLK_DECON_INT_ECLK */
                 <&clock_disp 103>; /* SCLK_DECON_INT_EXTCLKPLL */
        clock-names = "pclk_decon0",
                      "aclk_decon0",
                      "decon0_eclk",
                      "decon0_vclk";
        pinctrl-0 = <&lcd_clk &pwm1_out>;
        pinctrl-names = "default";
    };