Re: [PATCH v3 1/2] dt-bindings: display: bridge: Add bindings for SN65DSI83/84/85

From: Neil Armstrong
Date: Mon Feb 15 2021 - 04:05:45 EST


Hi,

On 14/02/2021 18:44, Jagan Teki wrote:
> SN65DSI83/84/85 devices are MIPI DSI to LVDS based bridge
> controller IC's from Texas Instruments.
>
> SN65DSI83 - Single Channel DSI to Single-link LVDS bridge
> SN65DSI84 - Single Channel DSI to Dual-link LVDS bridge
> SN65DSI85 - Dual Channel DSI to Dual-link LVDS bridge
>
> Right now the bridge driver is supporting Channel A with single
> link, so dt-bindings documented according to it.

Shouldn't it describe Dual-link LVDS already for SN65DSI84/85 and Dual Channel DSI for SN65DSI85 even if not implemented in the driver ?

Neil

>
> Cc: Marek Vasut <marex@xxxxxxx>
> Signed-off-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
> ---
> Changes for v3:
> - fixed Rob comments
> - updated commit message and file name to support all chip variants
> Changes for v2:
> - none
>
> .../bindings/display/bridge/ti,sn65dsi8x.yaml | 122 ++++++++++++++++++
> 1 file changed, 122 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/bridge/ti,sn65dsi8x.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi8x.yaml b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi8x.yaml
> new file mode 100644
> index 000000000000..7f9f8cd6e786
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi8x.yaml
> @@ -0,0 +1,122 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/ti,sn65dsi8x.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI SN65DSI83/84/85 MIPI DSI to LVDS bridge bindings
> +
> +maintainers:
> + - Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
> +
> +description: |
> + SN65DSI83/84/85 devices are MIPI DSI to LVDS based bridge controller
> + IC's from Texas Instruments.
> +
> + SN65DSI83 - Single Channel DSI to Single-link LVDS bridge
> + SN65DSI84 - Single Channel DSI to Dual-link LVDS bridge
> + SN65DSI85 - Dual Channel DSI to Dual-link LVDS bridge
> +
> + Bridge decodes MIPI DSI 18bpp RGB666 and 240bpp RG888 packets and
> + converts the formatted video data stream to a FlatLink compatible
> + LVDS output operating at pixel clocks operating from 25 MHx to
> + 154 MHz.
> +
> +properties:
> + compatible:
> + enum:
> + - ti,sn65dsi83
> + - ti,sn65dsi84
> +
> + reg:
> + const: 0x2c
> +
> + enable-gpios:
> + maxItems: 1
> + description: GPIO specifier for bridge enable pin (active high).
> +
> + ports:
> + $ref: /schemas/graph.yaml#/properties/ports
> +
> + properties:
> + port@0:
> + $ref: /schemas/graph.yaml#/properties/port
> + description: |
> + DSI Input. The remote endpoint phandle should be a
> + reference to a valid mipi_dsi_host device node.
> +
> + port@1:
> + $ref: /schemas/graph.yaml#/properties/port
> + description: |
> + Video port for LVDS output (panel or connector).
> +
> + required:
> + - port@0
> + - port@1
> +
> +required:
> + - compatible
> + - reg
> + - enable-gpios
> + - ports
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> +
> + dsi {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + dsi_in: endpoint {
> + remote-endpoint = <&ltdc_ep0_out>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> + dsi_out: endpoint {
> + remote-endpoint = <&bridge_in>;
> + data-lanes = <0 1>;
> + };
> + };
> + };
> + };
> +
> + i2c6 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + bridge@2c {
> + compatible = "ti,sn65dsi84";
> + reg = <0x2c>;
> + enable-gpios = <&gpiof 15 GPIO_ACTIVE_HIGH>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + bridge_in: endpoint {
> + remote-endpoint = <&dsi_out>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> + bridge_out: endpoint {
> + remote-endpoint = <&panel_in_lvds>;
> + };
> + };
> + };
> + };
> + };
>