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Diffstat (limited to 'Documentation/devicetree/bindings/display/bridge/sii902x.txt')
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diff --git a/Documentation/devicetree/bindings/display/bridge/sii902x.txt b/Documentation/devicetree/bindings/display/bridge/sii902x.txt new file mode 100644 index 000000000..02c21b584 --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/sii902x.txt @@ -0,0 +1,78 @@ +sii902x HDMI bridge bindings + +Required properties: + - compatible: "sil,sii9022" + - reg: i2c address of the bridge + +Optional properties: + - interrupts: describe the interrupt line used to inform the host + about hotplug events. + - reset-gpios: OF device-tree gpio specification for RST_N pin. + - iovcc-supply: I/O Supply Voltage (1.8V or 3.3V) + - cvcc12-supply: Digital Core Supply Voltage (1.2V) + + HDMI audio properties: + - #sound-dai-cells: <0> or <1>. <0> if only i2s or spdif pin + is wired, <1> if the both are wired. HDMI audio is + configured only if this property is found. + - sil,i2s-data-lanes: Array of up to 4 integers with values of 0-3 + Each integer indicates which i2s pin is connected to which + audio fifo. The first integer selects i2s audio pin for the + first audio fifo#0 (HDMI channels 1&2), second for fifo#1 + (HDMI channels 3&4), and so on. There is 4 fifos and 4 i2s + pins (SD0 - SD3). Any i2s pin can be connected to any fifo, + but there can be no gaps. E.g. an i2s pin must be mapped to + fifo#0 and fifo#1 before mapping a channel to fifo#2. Default + value is <0>, describing SD0 pin beiging routed to hdmi audio + fifo #0. + - clocks: phandle and clock specifier for each clock listed in + the clock-names property + - clock-names: "mclk" + Describes SII902x MCLK input. MCLK can be used to produce + HDMI audio CTS values. This property follows + Documentation/devicetree/bindings/clock/clock-bindings.txt + consumer binding. + + If HDMI audio is configured the sii902x device becomes an I2S + and/or spdif audio codec component (e.g a digital audio sink), + that can be used in configuring a full audio devices with + simple-card or audio-graph-card binding. See their binding + documents on how to describe the way the sii902x device is + connected to the rest of the audio system: + Documentation/devicetree/bindings/sound/simple-card.yaml + Documentation/devicetree/bindings/sound/audio-graph-card.txt + Note: In case of the audio-graph-card binding the used port + index should be 3. + +Optional subnodes: + - video input: this subnode can contain a video input port node + to connect the bridge to a display controller output (See this + documentation [1]). + +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt + +Example: + hdmi-bridge@39 { + compatible = "sil,sii9022"; + reg = <0x39>; + reset-gpios = <&pioA 1 0>; + iovcc-supply = <&v3v3_hdmi>; + cvcc12-supply = <&v1v2_hdmi>; + + #sound-dai-cells = <0>; + sil,i2s-data-lanes = < 0 1 2 >; + clocks = <&mclk>; + clock-names = "mclk"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + bridge_in: endpoint { + remote-endpoint = <&dc_out>; + }; + }; + }; + }; |