YUV420 Colorimetry - 3.1 English

DisplayPort 1.4 RX Subsystem Product Guide (PG300)

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3.1 English

In the AMD Vivado™ IDE, in the DisplayPort 1.4 RX Subsystem, when the Enable support for YUV420 ColorFormat option is selected (as shown in the following figure), the subsystem can support YUV420 colorimetry as mentioned in VESA DisplayPort Standard Version 1.4a (VESA website). When you select the 420 option, you are prompted to select 4PPC or 8PPC for the AXI4-Stream data output interface using the Output PPC with YUV420 Support option. 8PPC can be used for resolutions with YUV420 colorimetry which result in vid_clk > 300 MHz (for resolutions such as 8k at 60 fps).

Note: YUV420 colorimetry is not supported in MST mode. Refer to FB Pass-through with HDCP1.3 and HDCP2.2/2.3 example design described in Configuring HDCP Keys and Key Management for YUV420 colorimetry example.
Figure 1. DisplayPort 1.4 RX Subsystem with Option to Enable YUV420

The pixel arrangement of the YUV420 color format follows the UG934 standard on the output of the AXI4-Stream interface. This output AXI4-Stream data is obtained after YUV420's native mode output from the DisplayPort RX IP is converted into UG934's YUV420 AXI4-Stream data format. The following figure depicts the native mode data format of 4PPC YUV420 before being converted into the UG934 format.

Note: The figure depicts the case of USER_PIXEL_WIDTH (DisplayPort RX IP offset register 0x010) as 4, MAX_BPC of 12 and Video BPC of 8.
Figure 2. Native YUV420 Format Before Converted To YUV420 Video Format of UG934