On 11.10.2019 04:21, Xin Ji wrote:
> The ANX7625 is an ultra-low power 4K Mobile HD Transmitter designed
> for portable device. It converts MIPI to DisplayPort 1.3 4K.
>
> You can add support to your board with binding.
>
> Example:
> anx7625_bridge: encoder@58 {
> compatible = "analogix,anx7625";
> reg = <0x58>;
> status = "okay";
> panel-flags = <1>;
> enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
> reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
> #address-cells = <1>;
> #size-cells = <0>;
>
> port@0 {
> reg = <0>;
> anx_1_in: endpoint {
> remote-endpoint = <&mipi_dsi>;
> };
> };
>
> port@3 {
> reg = <3>;
> anx_1_out: endpoint {
> remote-endpoint = <&panel_in>;
> };
> };
> };
>
> Signed-off-by: Xin Ji <xji@xxxxxxxxxxxxxxxx>
> ---
> .../bindings/display/bridge/anx7625.yaml | 96 ++++++++++++++++++++++
> 1 file changed, 96 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/bridge/anx7625.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/anx7625.yaml
> new file mode 100644
> index 0000000..fc84683
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/anx7625.yaml
> @@ -0,0 +1,96 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2019 Analogix Semiconductor, Inc.
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/display/bridge/anx7625.yaml#";
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#";
> +
> +title: Analogix ANX7625 SlimPort (4K Mobile HD Transmitter)
> +
> +maintainers:
> + - Xin Ji <xji@xxxxxxxxxxxxxxxx>
> +
> +description: |
> + The ANX7625 is an ultra-low power 4K Mobile HD Transmitter
> + designed for portable devices.
> +
> +properties:
> + "#address-cells": true
> + "#size-cells": true
> +
> + compatible:
> + items:
> + - const: analogix,anx7625
> +
> + reg:
> + maxItems: 1
> +
> + panel-flags:
> + description: indicate the panel is internal or external
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + enable-gpios:
> + description: used for power on chip control, POWER_EN pin D2.
> + maxItems: 1
> +
> + reset-gpios:
> + description: used for reset chip control, RESET_N pin B7.
> + maxItems: 1
> +
> + port@0:
> + type: object
> + description:
> + A port node pointing to MIPI DSI host port node.
> +
> + port@1:
> + type: object
> + description:
> + A port node pointing to MIPI DPI host port node.
> +
> + port@2:
> + type: object
> + description:
> + A port node pointing to external connector port node.
> +
> + port@3:
> + type: object
> + description:
> + A port node pointing to eDP port node.
Decrypting available product brief[1], there are following physical lines:
Input:
- MIPI DSI/DPI - video data, are DSI and DPI lines shared?
- I2S - audio data,
- I2C - control line,
- ALERT/INTP - interrupt,
- USB 3.1 SSRc/Tx - for USB forwarding,
Output:
- SS1, SS2,
- SBU/AUX,
- CC1/2.
Having this information I try to understand ports defined by you:
- port@2 you have defined as pointing to external port, but here the
port should be rather subnode of ANX7625 - the chip has CC lines, see
beginning of [2].
- port@3 describes SS1, SS2 and SBU/AUX lines together, am I right? In
USB-C binding SBU and SS lines are represented by different ports,
different approach, but maybe better in this case.
Maybe it would be good to add 2nd example with USB-C port.
[1]:
https://www.analogix.com/system/files/AA-002291-PB-6-ANX7625_ProductBrief.pdf
[2]: Documentation/devicetree/bindings/connector/usb-connector.txt
Regards
Andrzej
> +
> +required:
> + - "#address-cells"
> + - "#size-cells"
> + - compatible
> + - reg
> + - port@0
> + - port@3
> +
> +example:
> + - |
> + anx7625_bridge: encoder@58 {
> + compatible = "analogix,anx7625";
> + reg = <0x58>;
> + status = "okay";
> + panel-flags = <1>;
> + enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
> + reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + anx_1_in: endpoint {
> + remote-endpoint = <&mipi_dsi>;
> + };
> + };
> +
> + port@3 {
> + reg = <3>;
> + anx_1_out: endpoint {
> + remote-endpoint = <&panel_in>;
> + };
> + };
> + };
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