0001 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
0002 # Copyright 2019 BayLibre, SAS
0003 %YAML 1.2
0004 ---
0005 $id: "http://devicetree.org/schemas/display/amlogic,meson-dw-hdmi.yaml#"
0006 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
0007
0008 title: Amlogic specific extensions to the Synopsys Designware HDMI Controller
0009
0010 maintainers:
0011 - Neil Armstrong <neil.armstrong@linaro.org>
0012
0013 allOf:
0014 - $ref: /schemas/sound/name-prefix.yaml#
0015
0016 description: |
0017 The Amlogic Meson Synopsys Designware Integration is composed of
0018 - A Synopsys DesignWare HDMI Controller IP
0019 - A TOP control block controlling the Clocks and PHY
0020 - A custom HDMI PHY in order to convert video to TMDS signal
0021 ___________________________________
0022 | HDMI TOP |<= HPD
0023 |___________________________________|
0024 | | |
0025 | Synopsys HDMI | HDMI PHY |=> TMDS
0026 | Controller |________________|
0027 |___________________________________|<=> DDC
0028
0029 The HDMI TOP block only supports HPD sensing.
0030 The Synopsys HDMI Controller interrupt is routed through the
0031 TOP Block interrupt.
0032 Communication to the TOP Block and the Synopsys HDMI Controller is done
0033 via a pair of dedicated addr+read/write registers.
0034 The HDMI PHY is configured by registers in the HHI register block.
0035
0036 Pixel data arrives in "4:4:4" format from the VENC block and the VPU HDMI mux
0037 selects either the ENCI encoder for the 576i or 480i formats or the ENCP
0038 encoder for all the other formats including interlaced HD formats.
0039
0040 The VENC uses a DVI encoder on top of the ENCI or ENCP encoders to generate
0041 DVI timings for the HDMI controller.
0042
0043 Amlogic Meson GXBB, GXL and GXM SoCs families embeds the Synopsys DesignWare
0044 HDMI TX IP version 2.01a with HDCP and I2C & S/PDIF
0045 audio source interfaces.
0046
0047 properties:
0048 compatible:
0049 oneOf:
0050 - items:
0051 - enum:
0052 - amlogic,meson-gxbb-dw-hdmi # GXBB (S905)
0053 - amlogic,meson-gxl-dw-hdmi # GXL (S905X, S905D)
0054 - amlogic,meson-gxm-dw-hdmi # GXM (S912)
0055 - const: amlogic,meson-gx-dw-hdmi
0056 - enum:
0057 - amlogic,meson-g12a-dw-hdmi # G12A (S905X2, S905Y2, S905D2)
0058
0059 reg:
0060 maxItems: 1
0061
0062 interrupts:
0063 maxItems: 1
0064
0065 clocks:
0066 minItems: 3
0067
0068 clock-names:
0069 items:
0070 - const: isfr
0071 - const: iahb
0072 - const: venci
0073
0074 resets:
0075 minItems: 3
0076
0077 reset-names:
0078 items:
0079 - const: hdmitx_apb
0080 - const: hdmitx
0081 - const: hdmitx_phy
0082
0083 hdmi-supply:
0084 description: phandle to an external 5V regulator to power the HDMI logic
0085
0086 port@0:
0087 $ref: /schemas/graph.yaml#/properties/port
0088 description:
0089 A port node pointing to the VENC Input port node.
0090
0091 port@1:
0092 $ref: /schemas/graph.yaml#/properties/port
0093 description:
0094 A port node pointing to the TMDS Output port node.
0095
0096 "#address-cells":
0097 const: 1
0098
0099 "#size-cells":
0100 const: 0
0101
0102 "#sound-dai-cells":
0103 const: 0
0104
0105 sound-name-prefix: true
0106
0107 required:
0108 - compatible
0109 - reg
0110 - interrupts
0111 - clocks
0112 - clock-names
0113 - resets
0114 - reset-names
0115 - port@0
0116 - port@1
0117 - "#address-cells"
0118 - "#size-cells"
0119
0120 additionalProperties: false
0121
0122 examples:
0123 - |
0124 hdmi_tx: hdmi-tx@c883a000 {
0125 compatible = "amlogic,meson-gxbb-dw-hdmi", "amlogic,meson-gx-dw-hdmi";
0126 reg = <0xc883a000 0x1c>;
0127 interrupts = <57>;
0128 resets = <&reset_apb>, <&reset_hdmitx>, <&reset_hdmitx_phy>;
0129 reset-names = "hdmitx_apb", "hdmitx", "hdmitx_phy";
0130 clocks = <&clk_isfr>, <&clk_iahb>, <&clk_venci>;
0131 clock-names = "isfr", "iahb", "venci";
0132 #address-cells = <1>;
0133 #size-cells = <0>;
0134
0135 /* VPU VENC Input */
0136 hdmi_tx_venc_port: port@0 {
0137 reg = <0>;
0138
0139 hdmi_tx_in: endpoint {
0140 remote-endpoint = <&hdmi_tx_out>;
0141 };
0142 };
0143
0144 /* TMDS Output */
0145 hdmi_tx_tmds_port: port@1 {
0146 reg = <1>;
0147
0148 hdmi_tx_tmds_out: endpoint {
0149 remote-endpoint = <&hdmi_connector_in>;
0150 };
0151 };
0152 };
