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