This patch adds bindings for i.MX8qm/qxp LVDS display bridge(LDB). Reviewed-by: Rob Herring <robh@xxxxxxxxxx> Signed-off-by: Liu Ying <victor.liu@xxxxxxx> --- v3->v4: * Add Rob's R-b tag. v2->v3: * Drop 'fsl,syscon' property. (Rob) * Mention the CSR module controls LDB. v1->v2: * Use graph schema. (Laurent) * Side note i.MX8qxp LDB official name 'pixel mapper'. (Laurent) .../bindings/display/bridge/fsl,imx8qxp-ldb.yaml | 173 +++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-ldb.yaml diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-ldb.yaml b/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-ldb.yaml new file mode 100644 index 00000000..9454300 --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-ldb.yaml @@ -0,0 +1,173 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/bridge/fsl,imx8qxp-ldb.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale i.MX8qm/qxp LVDS Display Bridge + +maintainers: + - Liu Ying <victor.liu@xxxxxxx> + +description: | + The Freescale i.MX8qm/qxp LVDS Display Bridge(LDB) has two channels. + + The i.MX8qm/qxp LDB is controlled by Control and Status Registers(CSR) module. + The CSR module, as a system controller, contains the LDB's configuration + registers. + + For i.MX8qxp LDB, each channel supports up to 24bpp parallel input color + format and can map the input to VESA or JEIDA standards. The two channels + cannot be used simultaneously, that is to say, the user should pick one of + them to use. Two LDB channels from two LDB instances can work together in + LDB split mode to support a dual link LVDS display. The channel indexes + have to be different. Channel0 outputs odd pixels and channel1 outputs + even pixels. + + For i.MX8qm LDB, each channel additionally supports up to 30bpp parallel + input color format. The two channels can be used simultaneously, either + in dual mode or split mode. In dual mode, the two channels output identical + data. In split mode, channel0 outputs odd pixels and channel1 outputs even + pixels. + + A side note is that i.MX8qm/qxp LDB is officially called pixel mapper in + the SoC reference manuals. The pixel mapper uses logic of LDBs embedded in + i.MX6qdl/sx SoCs, i.e., it is essentially based on them. To keep the naming + consistency, this binding calls it LDB. + +properties: + compatible: + enum: + - fsl,imx8qm-ldb + - fsl,imx8qxp-ldb + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + clocks: + items: + - description: pixel clock + - description: bypass clock + + clock-names: + items: + - const: pixel + - const: bypass + + power-domains: + maxItems: 1 + + fsl,companion-ldb: + $ref: /schemas/types.yaml#/definitions/phandle + description: | + A phandle which points to companion LDB which is used in LDB split mode. + +patternProperties: + "^channel@[0-1]$": + type: object + description: Represents a channel of LDB. + + properties: + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + reg: + description: The channel index. + enum: [ 0, 1 ] + + phys: + description: A phandle to the phy module representing the LVDS PHY. + maxItems: 1 + + phy-names: + const: lvds_phy + + port@0: + $ref: /schemas/graph.yaml#/properties/port + description: Input port of the channel. + + port@1: + $ref: /schemas/graph.yaml#/properties/port + description: Output port of the channel. + + required: + - "#address-cells" + - "#size-cells" + - reg + - phys + - phy-names + + additionalProperties: false + +required: + - compatible + - "#address-cells" + - "#size-cells" + - clocks + - clock-names + - power-domains + - channel@0 + - channel@1 + +allOf: + - if: + properties: + compatible: + contains: + const: fsl,imx8qm-ldb + then: + properties: + fsl,companion-ldb: false + +additionalProperties: false + +examples: + - | + #include <dt-bindings/firmware/imx/rsrc.h> + ldb { + #address-cells = <1>; + #size-cells = <0>; + compatible = "fsl,imx8qxp-ldb"; + clocks = <&clk IMX_SC_R_LVDS_0 IMX_SC_PM_CLK_MISC2>, + <&clk IMX_SC_R_LVDS_0 IMX_SC_PM_CLK_BYPASS>; + clock-names = "pixel", "bypass"; + power-domains = <&pd IMX_SC_R_LVDS_0>; + + channel@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + phys = <&mipi_lvds_0_phy>; + phy-names = "lvds_phy"; + + port@0 { + reg = <0>; + + mipi_lvds_0_ldb_ch0_mipi_lvds_0_pxl2dpi: endpoint { + remote-endpoint = <&mipi_lvds_0_pxl2dpi_mipi_lvds_0_ldb_ch0>; + }; + }; + }; + + channel@1 { + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; + phys = <&mipi_lvds_0_phy>; + phy-names = "lvds_phy"; + + port@0 { + reg = <0>; + + mipi_lvds_0_ldb_ch1_mipi_lvds_0_pxl2dpi: endpoint { + remote-endpoint = <&mipi_lvds_0_pxl2dpi_mipi_lvds_0_ldb_ch1>; + }; + }; + }; + }; -- 2.7.4
