| 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>; |
| }; |
| }; |
| }; |
| }; |