arm,malidp.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/display/arm,malidp.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Arm Mali Display Processor (Mali-DP) binding
    8 
    9 maintainers:
   10   - Liviu Dudau <Liviu.Dudau@arm.com>
   11   - Andre Przywara <andre.przywara@arm.com>
   12 
   13 description:
   14   The following bindings apply to a family of Display Processors sold as
   15   licensable IP by ARM Ltd. The bindings describe the Mali DP500, DP550 and
   16   DP650 processors that offer multiple composition layers, support for
   17   rotation and scaling output.
   18 
   19 properties:
   20   compatible:
   21     enum:
   22       - arm,mali-dp500
   23       - arm,mali-dp550
   24       - arm,mali-dp650
   25 
   26   reg:
   27     maxItems: 1
   28 
   29   interrupts:
   30     items:
   31       - description:
   32           The interrupt used by the Display Engine (DE). Can be shared with
   33           the interrupt for the Scaling Engine (SE), but it will have to be
   34           listed individually.
   35       - description:
   36           The interrupt used by the Scaling Engine (SE). Can be shared with
   37           the interrupt for the Display Engine (DE), but it will have to be
   38           listed individually.
   39 
   40   interrupt-names:
   41     items:
   42       - const: DE
   43       - const: SE
   44 
   45   clock-names:
   46     items:
   47       - const: pxlclk
   48       - const: mclk
   49       - const: aclk
   50       - const: pclk
   51 
   52   clocks:
   53     items:
   54       - description: the pixel clock feeding the output PLL of the processor
   55       - description: the main processor clock
   56       - description: the AXI interface clock
   57       - description: the APB interface clock
   58 
   59   memory-region:
   60     maxItems: 1
   61     description:
   62       Phandle to a node describing memory to be used for the framebuffer.
   63       If not present, the framebuffer may be located anywhere in memory.
   64 
   65   arm,malidp-output-port-lines:
   66     $ref: /schemas/types.yaml#/definitions/uint8-array
   67     description:
   68       Number of output lines/bits for each colour channel.
   69     items:
   70       - description: number of output lines for the red channel (R)
   71       - description: number of output lines for the green channel (G)
   72       - description: number of output lines for the blue channel (B)
   73 
   74   arm,malidp-arqos-value:
   75     $ref: /schemas/types.yaml#/definitions/uint32
   76     description:
   77       Quality-of-Service value for the display engine FIFOs, to write
   78       into the RQOS register of the DP500.
   79       See the ARM Mali-DP500 TRM for details on the encoding.
   80       If omitted, the RQOS register will not be changed.
   81 
   82   port:
   83     $ref: /schemas/graph.yaml#/properties/port
   84     unevaluatedProperties: false
   85     description:
   86       Output endpoint of the controller, connecting the LCD panel signals.
   87 
   88 additionalProperties: false
   89 
   90 required:
   91   - compatible
   92   - reg
   93   - interrupts
   94   - interrupt-names
   95   - clocks
   96   - clock-names
   97   - port
   98   - arm,malidp-output-port-lines
   99 
  100 examples:
  101   - |
  102     dp0: malidp@6f200000 {
  103         compatible = "arm,mali-dp650";
  104         reg = <0x6f200000 0x20000>;
  105         memory-region = <&display_reserved>;
  106         interrupts = <168>, <168>;
  107         interrupt-names = "DE", "SE";
  108         clocks = <&oscclk2>, <&fpgaosc0>, <&fpgaosc1>, <&fpgaosc1>;
  109         clock-names = "pxlclk", "mclk", "aclk", "pclk";
  110         arm,malidp-output-port-lines = /bits/ 8 <8 8 8>;
  111         arm,malidp-arqos-value = <0xd000d000>;
  112 
  113         port {
  114             dp0_output: endpoint {
  115                 remote-endpoint = <&tda998x_2_input>;
  116             };
  117         };
  118     };
  119 ...

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