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diff --git a/Documentation/devicetree/bindings/sound/xlnx,dp-snd-pcm.txt b/Documentation/devicetree/bindings/sound/xlnx,dp-snd-pcm.txt
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+Device-Tree bindings for Xilinx ZynqMP DisplayPort PCM
+
+The DPDMA driver of ZynqMP DisplayPort subsystem is based on DMA engine,
+and the DP PCM driver is based on snd dmaengine helpers.
+
+Required properties:
+ - compatible: Should be "xlnx,dp-snd-pcm".
+ - dmas: the phandle list of DMA specifiers. The dma channel ID should be one
+   of 4 for audio0 channel or 5 for audio1 channel.
+ - dma-names: the indentifier strings for DMAs. The value should be "tx".
+
+Example:
+
+	xlnx_dp_snd_pcm0: dp_snd_pcm0 {
+		compatible = "xlnx,dp-snd-pcm";
+		dmas = <&xlnx_dpdma 4>;
+		dma-names = "tx";
+	};