Questions and Answers - 3.0 English

DisplayPort 1.4 RX Subsystem Product Guide (PG300)

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3.0 English

Q. Can both RX and TX be used on the same GT quad for DisplayPort?

A. Yes. The Video PHY Controller supports the capability of performing both RX and TX on the GT quads. However, they cannot be different protocols.

Q. Does the Video PHY Controller support different protocols for RX and TX?

A. No. The Video PHY Controller must use the same protocol if both RX and TX is being used.

Q. I am having link training issues. What are some things that can be done to improve link training?

A. Perform the following:

  1. Verify that all relevant ARs are taken into account.
  2. Increase the AUX_DEFER value in register offset 0x004.

Q. Does the Xilinx® subsystem support my resolution and frame rate?

A. Perform the following:
  1. DisplayPort should operate 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_component × frame rate) < (0.8 × link_lane × num_lanes)

Q. Can I get more information on EDID?

A. 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.