Question: Can both RX and TX be used on the same GT quad for DisplayPort?
Answer: Yes. The Video PHY Controller supports the capability of performing both RX and TX on the same GT quad. However, they cannot be different protocols.
Question: Does the Video PHY Controller support different protocols for RX and TX?
Answer: No. The Video PHY Controller must use the same protocol if both RX and TX are used.
Question: I am facing issues with link training. What are some things that can be done to improve link training?
Question: Does the AMD subsystem support my resolution and frame rate?
Answer: Perform the following:
- DisplayPort operates at any resolution and frame rate as long as the DisplayPort link is
not oversubscribed. Use the following equation to determine if the custom resolution can
be supported:(HTotal × VTotal × bits_per_pixel × frame rate) < (0.8 × link_lane × num_lanes)
- When using the AXI4-Stream video interface, the interface
width (TDATA) is fixed by the selected Pixels-Per-Clock (PPC) setting; it is not
independently configurable:TDATA Width (bits) = PPC × 3 × max_bits_per_component
This restriction does not apply when using the native video interface.
Question: Can I get more information on EDID?
Answer: The EDID block is outside of the DisplayPort controller and is connected using the I2C interface. It is your responsibility to add the proper EDID content. If you select a different clock source for the EDID block, ensure that the I2C bus has the proper false path constraints.