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SubjectRe: [PATCH v4 08/14] dt-bindings: display: bridge: Add i.MX8qxp pixel link to DPI binding
On Thu, Feb 18, 2021 at 11:41:49AM +0800, Liu Ying wrote:
> This patch adds bindings for i.MX8qxp pixel link to DPI(PXL2DPI).
>
> Signed-off-by: Liu Ying <victor.liu@nxp.com>
> ---
> v3->v4:
> * Add 'fsl,sc-resource' property. (Rob)
>
> v2->v3:
> * Drop 'fsl,syscon' property. (Rob)
> * Mention the CSR module controls PXL2DPI.
>
> v1->v2:
> * Use graph schema. (Laurent)
>
> .../display/bridge/fsl,imx8qxp-pxl2dpi.yaml | 108 +++++++++++++++++++++
> 1 file changed, 108 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pxl2dpi.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pxl2dpi.yaml b/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pxl2dpi.yaml
> new file mode 100644
> index 00000000..e4e77fa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pxl2dpi.yaml
> @@ -0,0 +1,108 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/fsl,imx8qxp-pxl2dpi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale i.MX8qxp Pixel Link to Display Pixel Interface
> +
> +maintainers:
> + - Liu Ying <victor.liu@nxp.com>
> +
> +description: |
> + The Freescale i.MX8qxp Pixel Link to Display Pixel Interface(PXL2DPI)
> + interfaces the pixel link 36-bit data output and the DSI controller’s
> + MIPI-DPI 24-bit data input, and inputs of LVDS Display Bridge(LDB) module
> + used in LVDS mode, to remap the pixel color codings between those modules.
> + This module is purely combinatorial.
> +
> + The i.MX8qxp PXL2DPI is controlled by Control and Status Registers(CSR) module.
> + The CSR module, as a system controller, contains the PXL2DPI's configuration
> + register.

So this node should be a child of the CSR. Ideally, this schema is also
referenced from the CSR's schema (and if that doesn't exist, it should
be there first).

> +
> +properties:
> + compatible:
> + const: fsl,imx8qxp-pxl2dpi
> +
> + fsl,sc-resource:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: The SCU resource ID associated with this PXL2DPI instance.
> +
> + power-domains:
> + maxItems: 1
> +
> + fsl,companion-pxl2dpi:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + description: |
> + A phandle which points to companion PXL2DPI which is used by downstream
> + LVDS Display Bridge(LDB) in split mode.
> +
> + ports:
> + $ref: /schemas/graph.yaml#/properties/ports
> +
> + properties:
> + port@0:
> + $ref: /schemas/graph.yaml#/properties/port
> + description: The PXL2DPI input port node from pixel link.
> +
> + port@1:
> + $ref: /schemas/graph.yaml#/properties/port
> + description: The PXL2DPI output port node to downstream bridge.
> +
> + required:
> + - port@0
> + - port@1
> +
> +required:
> + - compatible
> + - fsl,sc-resource
> + - power-domains
> + - ports
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/firmware/imx/rsrc.h>
> + pxl2dpi {
> + compatible = "fsl,imx8qxp-pxl2dpi";
> + fsl,sc-resource = <IMX_SC_R_MIPI_0>;
> + power-domains = <&pd IMX_SC_R_MIPI_0>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0>;
> +
> + mipi_lvds_0_pxl2dpi_dc_pixel_link0: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&dc_pixel_link0_mipi_lvds_0_pxl2dpi>;
> + };
> +
> + mipi_lvds_0_pxl2dpi_dc_pixel_link1: endpoint@1 {
> + reg = <1>;
> + remote-endpoint = <&dc_pixel_link1_mipi_lvds_0_pxl2dpi>;
> + };
> + };
> +
> + port@1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <1>;
> +
> + mipi_lvds_0_pxl2dpi_mipi_lvds_0_ldb_ch0: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&mipi_lvds_0_ldb_ch0_mipi_lvds_0_pxl2dpi>;
> + };
> +
> + mipi_lvds_0_pxl2dpi_mipi_lvds_0_ldb_ch1: endpoint@1 {
> + reg = <1>;
> + remote-endpoint = <&mipi_lvds_0_ldb_ch1_mipi_lvds_0_pxl2dpi>;
> + };
> + };
> + };
> + };
> --
> 2.7.4
>

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