allwinner,sun4i-a10-display-engine.yaml

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    1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/display/allwinner,sun4i-a10-display-engine.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Allwinner A10 Display Engine Pipeline Device Tree Bindings
    8 
    9 maintainers:
   10   - Chen-Yu Tsai <wens@csie.org>
   11   - Maxime Ripard <mripard@kernel.org>
   12 
   13 description: |
   14   The display engine pipeline (and its entry point, since it can be
   15   either directly the backend or the frontend) is represented as an
   16   extra node.
   17 
   18   The Allwinner A10 Display pipeline is composed of several components
   19   that are going to be documented below:
   20 
   21   For all connections between components up to the TCONs in the
   22   display pipeline, when there are multiple components of the same
   23   type at the same depth, the local endpoint ID must be the same as
   24   the remote component's index. For example, if the remote endpoint is
   25   Frontend 1, then the local endpoint ID must be 1.
   26 
   27   Frontend 0  [0] ------- [0]  Backend 0  [0] ------- [0]  TCON 0
   28               [1] --   -- [1]             [1] --   -- [1]
   29                     \ /                         \ /
   30                      X                           X
   31                     / \                         / \
   32               [0] --   -- [0]             [0] --   -- [0]
   33   Frontend 1  [1] ------- [1]  Backend 1  [1] ------- [1]  TCON 1
   34 
   35   For a two pipeline system such as the one depicted above, the lines
   36   represent the connections between the components, while the numbers
   37   within the square brackets corresponds to the ID of the local endpoint.
   38 
   39   The same rule also applies to DE 2.0 mixer-TCON connections:
   40 
   41   Mixer 0  [0] ----------- [0]  TCON 0
   42            [1] ----   ---- [1]
   43                    \ /
   44                     X
   45                    / \
   46            [0] ----   ---- [0]
   47   Mixer 1  [1] ----------- [1]  TCON 1
   48 
   49 properties:
   50   compatible:
   51     enum:
   52       - allwinner,sun4i-a10-display-engine
   53       - allwinner,sun5i-a10s-display-engine
   54       - allwinner,sun5i-a13-display-engine
   55       - allwinner,sun6i-a31-display-engine
   56       - allwinner,sun6i-a31s-display-engine
   57       - allwinner,sun7i-a20-display-engine
   58       - allwinner,sun8i-a23-display-engine
   59       - allwinner,sun8i-a33-display-engine
   60       - allwinner,sun8i-a83t-display-engine
   61       - allwinner,sun8i-h3-display-engine
   62       - allwinner,sun8i-r40-display-engine
   63       - allwinner,sun8i-v3s-display-engine
   64       - allwinner,sun9i-a80-display-engine
   65       - allwinner,sun20i-d1-display-engine
   66       - allwinner,sun50i-a64-display-engine
   67       - allwinner,sun50i-h6-display-engine
   68 
   69   allwinner,pipelines:
   70     $ref: /schemas/types.yaml#/definitions/phandle-array
   71     minItems: 1
   72     maxItems: 2
   73     items:
   74       maxItems: 1
   75     description: |
   76       Available display engine frontends (DE 1.0) or mixers (DE
   77       2.0/3.0) available.
   78 
   79 required:
   80   - compatible
   81   - allwinner,pipelines
   82 
   83 additionalProperties: false
   84 
   85 if:
   86   properties:
   87     compatible:
   88       contains:
   89         enum:
   90           - allwinner,sun4i-a10-display-engine
   91           - allwinner,sun6i-a31-display-engine
   92           - allwinner,sun6i-a31s-display-engine
   93           - allwinner,sun7i-a20-display-engine
   94           - allwinner,sun8i-a83t-display-engine
   95           - allwinner,sun8i-r40-display-engine
   96           - allwinner,sun9i-a80-display-engine
   97           - allwinner,sun20i-d1-display-engine
   98           - allwinner,sun50i-a64-display-engine
   99 
  100 then:
  101   properties:
  102     allwinner,pipelines:
  103       minItems: 2
  104 
  105 else:
  106   properties:
  107     allwinner,pipelines:
  108       maxItems: 1
  109 
  110 examples:
  111   - |
  112       de: display-engine {
  113           compatible = "allwinner,sun4i-a10-display-engine";
  114           allwinner,pipelines = <&fe0>, <&fe1>;
  115       };
  116 
  117 ...

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/display/allwinner,sun4i-a10-display-engine.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/display/allwinner,sun4i-a10-display-engine.yaml