HDMI RX Flow - 1.0 English

HDMI GT Controller LogiCORE IP Product Guide (PG334)

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In TMDS mode, a change in the RX reference clock signifies a video format change, which triggers a series of interrupts until the GT RX attains the RX Reset Done status.

There are several API callback hooks that the HDMI GT Controller core executes throughout the HDMI RX operation. If necessary, these callbacks are available for inserting or adding more function calls on top of what is in the software application.

RX FRL mode is entered when the XHdmiphy1_Hdmi21Config API is called in the application. It requires the target FRL rate (3, 6, 8, 10, and 12 Gbps) and the number of channels (3 or 4). After this, it performs all tasks under the RX Timer Timeout Intr to attain RX Reset Done status eventually.

Figure 1. HDMI RX Program Flow