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Convert the device tree binding documentation for tilcdc from plain text to DT binding schema. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com> Signed-off-by: Kory Maincent (TI.com) <kory.maincent@bootlin.com> Link: https://patch.msgid.link/20260123-feature_tilcdc-v5-1-5a44d2aa3f6f@bootlin.com Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
101 lines
2.9 KiB
YAML
101 lines
2.9 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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# Copyright 2025 Bootlin
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/display/tilcdc/ti,am33xx-tilcdc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: TI LCD Controller, found on AM335x, DA850, AM18x and OMAP-L138
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maintainers:
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- Kory Maincent <kory.maincent@bootlin.com>
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properties:
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compatible:
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enum:
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- ti,am33xx-tilcdc
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- ti,da850-tilcdc
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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port:
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$ref: /schemas/graph.yaml#/properties/port
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ti,hwmods:
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$ref: /schemas/types.yaml#/definitions/string
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description:
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Name of the hwmod associated to the LCDC
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max-bandwidth:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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The maximum pixels per second that the memory interface / lcd
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controller combination can sustain
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# maximum: 2048*2048*60
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maximum: 251658240
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max-width:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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The maximum horizontal pixel width supported by the lcd controller.
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maximum: 2048
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max-pixelclock:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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The maximum pixel clock that can be supported by the lcd controller
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in KHz.
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blue-and-red-wiring:
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enum: [straight, crossed]
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description:
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This property deals with the LCDC revision 2 (found on AM335x)
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color errata [1].
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- "straight" indicates normal wiring that supports RGB565,
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BGR888, and XBGR8888 color formats.
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- "crossed" indicates wiring that has blue and red wires
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crossed. This setup supports BGR565, RGB888 and XRGB8888
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formats.
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- If the property is not present or its value is not recognized
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the legacy mode is assumed. This configuration supports RGB565,
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RGB888 and XRGB8888 formats. However, depending on wiring, the red
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and blue colors are swapped in either 16 or 24-bit color modes.
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[1] There is an errata about AM335x color wiring. For 16-bit color
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mode the wires work as they should (LCD_DATA[0:4] is for Blue[3:7]),
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but for 24 bit color modes the wiring of blue and red components is
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crossed and LCD_DATA[0:4] is for Red[3:7] and LCD_DATA[11:15] is
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for Blue[3-7]. For more details see section 3.1.1 in AM335x
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Silicon Errata
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https://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sprz360
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required:
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- compatible
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- interrupts
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- reg
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- port
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additionalProperties: false
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examples:
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- |
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display-controller@4830e000 {
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compatible = "ti,am33xx-tilcdc";
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reg = <0x4830e000 0x1000>;
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interrupt-parent = <&intc>;
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interrupts = <36>;
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ti,hwmods = "lcdc";
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blue-and-red-wiring = "crossed";
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port {
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endpoint {
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remote-endpoint = <&hdmi_0>;
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};
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};
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};
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