Why does the Arria® 10, Cyclone® 10, and Stratix®10 HDMI FPGA IP Design Example fail to work when switching the resolution from FRL to TMDS mode?

Description

Due to a problem in the Arria® 10, Cyclone® 10 and Stratix®10 HDMI FPGA IP Design Example when using the Quartus® Prime Pro Edition Software v24.1 and earlier, you will observe rx_is_lockedtodata toggling when switching FRL to TMDS mode when using the HDMI FPGA IP Design Example.

Resolution

To workaround this problem, modify the mr_rx_rcfg_ctrl.v as shown below in bold. 

timeout_cntr_reset <=   (current_state == IDLE) ||
                                    ((current_state == RECONFIG_PLL_TMDS) && rxpll_tmds_rcfg_done) ||
                                    ((current_state == WAIT_PLL_TMDS_LOCKED) && rxpll_tmds_locked && rxphy_analogreset_ack) ||
                                    ((current_state == RECONFIG_RXPHY) && rxphy_rcfg_done) ||
                                    ((current_state == WAIT_RXPHY_READY) && rxphy_ready) ||
                                    ((current_state == WAIT_RXCORE_LOCKED) && (rxcore_locked)) ||
                                    ((current_state == RXCORE_IS_LOCKED) && (rxcore_locked));

This problem is fixed beginning with version 24.3 of the Quartus® Prime Pro Edition Software.