| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 |
| 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 | ... |