| # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
| # Copyright 2019 BayLibre, SAS |
| %YAML 1.2 |
| --- |
| $id: "http://devicetree.org/schemas/display/amlogic,meson-dw-hdmi.yaml#" |
| $schema: "http://devicetree.org/meta-schemas/core.yaml#" |
| |
| title: Amlogic specific extensions to the Synopsys Designware HDMI Controller |
| |
| maintainers: |
| - Neil Armstrong <narmstrong@baylibre.com> |
| |
| description: | |
| The Amlogic Meson Synopsys Designware Integration is composed of |
| - A Synopsys DesignWare HDMI Controller IP |
| - A TOP control block controlling the Clocks and PHY |
| - A custom HDMI PHY in order to convert video to TMDS signal |
| ___________________________________ |
| | HDMI TOP |<= HPD |
| |___________________________________| |
| | | | |
| | Synopsys HDMI | HDMI PHY |=> TMDS |
| | Controller |________________| |
| |___________________________________|<=> DDC |
| |
| The HDMI TOP block only supports HPD sensing. |
| The Synopsys HDMI Controller interrupt is routed through the |
| TOP Block interrupt. |
| Communication to the TOP Block and the Synopsys HDMI Controller is done |
| via a pair of dedicated addr+read/write registers. |
| The HDMI PHY is configured by registers in the HHI register block. |
| |
| Pixel data arrives in "4:4:4" format from the VENC block and the VPU HDMI mux |
| selects either the ENCI encoder for the 576i or 480i formats or the ENCP |
| encoder for all the other formats including interlaced HD formats. |
| |
| The VENC uses a DVI encoder on top of the ENCI or ENCP encoders to generate |
| DVI timings for the HDMI controller. |
| |
| Amlogic Meson GXBB, GXL and GXM SoCs families embeds the Synopsys DesignWare |
| HDMI TX IP version 2.01a with HDCP and I2C & S/PDIF |
| audio source interfaces. |
| |
| properties: |
| compatible: |
| oneOf: |
| - items: |
| - enum: |
| - amlogic,meson-gxbb-dw-hdmi # GXBB (S905) |
| - amlogic,meson-gxl-dw-hdmi # GXL (S905X, S905D) |
| - amlogic,meson-gxm-dw-hdmi # GXM (S912) |
| - const: amlogic,meson-gx-dw-hdmi |
| - enum: |
| - amlogic,meson-g12a-dw-hdmi # G12A (S905X2, S905Y2, S905D2) |
| |
| reg: |
| maxItems: 1 |
| |
| interrupts: |
| maxItems: 1 |
| |
| clocks: |
| minItems: 3 |
| |
| clock-names: |
| items: |
| - const: isfr |
| - const: iahb |
| - const: venci |
| |
| resets: |
| minItems: 3 |
| |
| reset-names: |
| items: |
| - const: hdmitx_apb |
| - const: hdmitx |
| - const: hdmitx_phy |
| |
| hdmi-supply: |
| description: phandle to an external 5V regulator to power the HDMI logic |
| |
| port@0: |
| type: object |
| description: |
| A port node pointing to the VENC Input port node. |
| |
| port@1: |
| type: object |
| description: |
| A port node pointing to the TMDS Output port node. |
| |
| "#address-cells": |
| const: 1 |
| |
| "#size-cells": |
| const: 0 |
| |
| "#sound-dai-cells": |
| const: 0 |
| |
| required: |
| - compatible |
| - reg |
| - interrupts |
| - clocks |
| - clock-names |
| - resets |
| - reset-names |
| - port@0 |
| - port@1 |
| - "#address-cells" |
| - "#size-cells" |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| hdmi_tx: hdmi-tx@c883a000 { |
| compatible = "amlogic,meson-gxbb-dw-hdmi", "amlogic,meson-gx-dw-hdmi"; |
| reg = <0xc883a000 0x1c>; |
| interrupts = <57>; |
| resets = <&reset_apb>, <&reset_hdmitx>, <&reset_hdmitx_phy>; |
| reset-names = "hdmitx_apb", "hdmitx", "hdmitx_phy"; |
| clocks = <&clk_isfr>, <&clk_iahb>, <&clk_venci>; |
| clock-names = "isfr", "iahb", "venci"; |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| /* VPU VENC Input */ |
| hdmi_tx_venc_port: port@0 { |
| reg = <0>; |
| |
| hdmi_tx_in: endpoint { |
| remote-endpoint = <&hdmi_tx_out>; |
| }; |
| }; |
| |
| /* TMDS Output */ |
| hdmi_tx_tmds_port: port@1 { |
| reg = <1>; |
| |
| hdmi_tx_tmds_out: endpoint { |
| remote-endpoint = <&hdmi_connector_in>; |
| }; |
| }; |
| }; |
| |
