From: Ryan Brue <[email protected]> The Novatek NT51021 is a DSI panel controller driving 1200x1920 WUXGA panels over four lanes in video mode. It is fitted in the Amazon Fire HD 10 (2017), on a module carrying BOE glass.
The controller has no readable panel identity. MediaTek's LCM framework identifies panels through a .compare_id callback and the vendor's driver for this one leaves it unset, and the glass part number is not recorded anywhere in the vendor tree -- it names the module only "BOE". I had the compatible name the module after the board it ships in, the way xiaomi,elish-boe-nt36523 and lenovo,j606f-boe-nt36523w do for this situation. The vendor's bootloader and kernel both carry a second register sequence for Innolux glass, selected from two board ID straps, so a second module exists as far as the vendor firmware is concerned. I didn't have an Innolux unit to test with, and I don't know its part number, so it is not described here. Naming the glass in the compatible leaves room for it as a second compatible should someone have the hardware and the need. The rest is panel-common: a power supply, a reset GPIO, an optional backlight and the DSI port. Assisted-by: LLM Signed-off-by: Ryan Brue <[email protected]> --- .../bindings/display/panel/novatek,nt51021.yaml | 65 ++++++++++++++++++++++ 1 file changed, 65 insertions(+) diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt51021.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt51021.yaml new file mode 100644 index 000000000000..ee3adc88ec9b --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/novatek,nt51021.yaml @@ -0,0 +1,65 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/panel/novatek,nt51021.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Novatek NT51021 based 1200x1920 DSI display panels + +maintainers: + - Ryan Brue <[email protected]> + +description: + The Novatek NT51021 is a DSI panel controller driving 1200x1920 WUXGA + panels over four lanes in video mode. The controller carries no readable + panel identity, so each panel module it is fitted to needs its own + compatible naming the module. + +allOf: + - $ref: panel-common.yaml# + +properties: + compatible: + items: + - const: amazon,suez-boe-nt51021 + - const: novatek,nt51021 + + reg: + maxItems: 1 + + power-supply: true + reset-gpios: true + backlight: true + port: true + +required: + - compatible + - reg + - power-supply + - reset-gpios + - port + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + dsi { + #address-cells = <1>; + #size-cells = <0>; + + panel@0 { + compatible = "amazon,suez-boe-nt51021", "novatek,nt51021"; + reg = <0>; + backlight = <&backlight_lcd>; + power-supply = <&vgp6>; + reset-gpios = <&pio 105 GPIO_ACTIVE_LOW>; + + port { + endpoint { + remote-endpoint = <&dsi_out>; + }; + }; + }; + }; -- 2.55.0
