Enhanced Gaming and Media Features - 1.2 English

HDMI 2.1 Transmitter Subsystem v1.2 Product Guide (PG350)

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1.2 English

The HDMI 2.1 TX Subsystem supports the following HDMI 2.1 enhanced gaming features:

  • Variable Refresh Rate (VRR)
    • Supports both VRR and VRR + FVA
  • Quick Frame Transport (QFT)
  • Auto Low Latency Mode (ALLM)
  • Quick Media Switching (QMS)

These features are supported in both in AXI4-Stream, Native Video, and Native Video (Vectored DE) interfaces. However, in the Native Video or Native Video (Vectored DE) interface, you are responsible for sending video timing data.

  1. You need to generate the HF-VSIF packet with the ALLM value and send the HF-VSIF packet as a generic an Aux packet to the IP.
  2. The IP/driver does not support the calculation of MMin, Mmax, FVA_FactorMax, VRRMAX, or VRRMIN. You are responsible for configuring the correct MVRR and FVA values.

The API are provided in the HDMI 2.1 TX Subsystem driver to configure the VRR/QMS/QFT features, VTEM packets, and adjust the refresh rate.