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dt-bindings: display: bridge: Repurpose lvds-encoder

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In an effort to repurpose lvds-encoder.c to also serve the
function of LVDS decoders, we ended up defining a new "generic"
compatible string ("lvds-decoder"), therefore adapt the dt schema
to allow for the new compatible string.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[narmstrong: fixed port descriptions as acked with lpinchart]
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1573660292-10629-9-git-send-email-fabrizio.castro@bp.renesas.com
This commit is contained in:
Fabrizio Castro
2019-11-13 15:51:27 +00:00
committed by Neil Armstrong
parent 319d8e9814
commit 575af8ecd1
1 changed files with 42 additions and 12 deletions
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129
Documentation/devicetree/bindings/display/bridge/lvds-codec.yaml Normal file
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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/bridge/lvds-codec.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Transparent LVDS encoders and decoders
maintainers:
- Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
description: |
This binding supports transparent LVDS encoders and decoders that don't
require any configuration.
LVDS is a physical layer specification defined in ANSI/TIA/EIA-644-A. Multiple
incompatible data link layers have been used over time to transmit image data
to LVDS panels. This binding targets devices compatible with the following
specifications only.
[JEIDA] "Digital Interface Standards for Monitor", JEIDA-59-1999, February
1999 (Version 1.0), Japan Electronic Industry Development Association (JEIDA)
[LDI] "Open LVDS Display Interface", May 1999 (Version 0.95), National
Semiconductor
[VESA] "VESA Notebook Panel Standard", October 2007 (Version 1.0), Video
Electronics Standards Association (VESA)
Those devices have been marketed under the FPD-Link and FlatLink brand names
among others.
properties:
compatible:
description: |
Must list the device specific compatible string first, followed by the
generic compatible string.
oneOf:
- items:
- enum:
- ti,ds90c185 # For the TI DS90C185 FPD-Link Serializer
- ti,ds90c187 # For the TI DS90C187 FPD-Link Serializer
- ti,sn75lvds83 # For the TI SN75LVDS83 FlatLink transmitter
- const: lvds-encoder # Generic LVDS encoder compatible fallback
- const: lvds-decoder # Generic LVDS decoders compatible fallback
ports:
type: object
description: |
This device has two video ports. Their connections are modeled using the
OF graph bindings specified in Documentation/devicetree/bindings/graph.txt
properties:
port@0:
type: object
description: |
For LVDS encoders, port 0 is the parallel input
For LVDS decoders, port 0 is the LVDS input
port@1:
type: object
description: |
For LVDS encoders, port 1 is the LVDS output
For LVDS decoders, port 1 is the parallel output
required:
- port@0
- port@1
powerdown-gpios:
description:
The GPIO used to control the power down line of this device.
maxItems: 1
required:
- compatible
- ports
examples:
- |
lvds-encoder {
compatible = "ti,ds90c185", "lvds-encoder";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
lvds_enc_in: endpoint {
remote-endpoint = <&display_out_rgb>;
};
};
port@1 {
reg = <1>;
lvds_enc_out: endpoint {
remote-endpoint = <&lvds_panel_in>;
};
};
};
};
- |
lvds-decoder {
compatible = "lvds-decoder";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
lvds_dec_in: endpoint {
remote-endpoint = <&display_out_lvds>;
};
};
port@1 {
reg = <1>;
lvds_dec_out: endpoint {
remote-endpoint = <&rgb_panel_in>;
};
};
};
};
...