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Device-Tree bindings for Xilinx SDI audio
The IP core supports embed/extract of audio in SDI Tx and Rx
protocol respectively. Reference to PG:
https://www.xilinx.com/support/documentation/ip_documentation/v_uhdsdi_audio/v1_0/pg309-v-uhdsdi-audio.pdf
Required properties:
- compatible: Should be one of:
"xlnx,v-uhdsdi-audio-2.0"
"xlnx,v-uhdsdi-audio-1.0"
Note: v1.0 (xlnx,v-uhdsdi-audio-1.0) is deprecated
and driver no longer supports it. Mandatory to upgrade to v2.0
- interrupts: Interrupt number.
- interrupts-parent: phandle for interrupt controller.
- reg: Base address and size of the IP core instance.
- xlnx,snd-pcm: reference to audio formatter block
- clock-names: List of input clocks.
Required elements for SDI Embed: "s_axi_aclk", "s_axis_clk", "sdi_embed_clk".
Required elements for SDI Extract: "s_axi_aclk", "sdi_extract_clk", "m_axis_clk".
- clocks: Input clock specifier. Refer to common clock bindings.
SDI embed contains a output port to remote endpoint of SDI video Tx node.
This pipeline should be described using the DT bindings defined in
Documentation/devicetree/bindings/graph.txt
Example:
audio_ss_0_v_uhdsdi_audio_extract_0: v_uhdsdi_audio@80080000 {
compatible = "xlnx,v-uhdsdi-audio-2.0";
clock-names = "s_axi_aclk", "sdi_extract_clk", "m_axis_clk";
clocks = <&misc_clk_0>, <&misc_clk_1>, <&misc_clk_0>;
interrupt-names = "interrupt";
interrupt-parent = <&gic>;
interrupts = <0 106 4>;
reg = <0x0 0x80080000 0x0 0x10000>;
xlnx,snd-pcm = <&audio_ss_0_audio_formatter_0>;
};
audio_ss_0_v_uhdsdi_audio_embed_0: v_uhdsdi_audio@80090000 {
compatible = "xlnx,v-uhdsdi-audio-2.0";
clock-names = "s_axi_aclk", "s_axis_clk", "sdi_embed_clk";
clocks = <&misc_clk_0>, <&misc_clk_0>, <&misc_clk_1>;
interrupt-names = "interrupt";
interrupt-parent = <&gic>;
interrupts = <0 107 4>;
reg = <0x0 0x80090000 0x0 0x10000>;
xlnx,snd-pcm = <&audio_ss_0_audio_formatter_0>;
sdi_av_port: port@0 {
reg = <0>;
sditx_audio_embed_src: endpoint {
remote-endpoint = <&sdi_audio_sink_port>;
};
};
};
Node 'v_smpte_uhdsdi_tx_ss' is documented in SDI Tx video bindings,
located at Documentation/devicetree/bindings/display/xlnx/xlnx,sdi-tx.txt.
Node 'audio_ss_0_audio_formatter_0' node is documented
at Documentation/devicetree/bindings/sound/xlnx,audio-formatter.txt
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