Hi,
We have a Cyclone 10 GX based custom board with SN75DP130 re-driver and a mDP connector. We are trying to port Altera's DP IP in TX-Only mode. Because of schematic issues, XCVR lanes form FPGA are connected in the reverse order i.e., lane_0 from FPGA is connected to IN3 on re-driver (polarity is not inverted). We are using DP breakout boards between FPGA board and Monitor to properly map lane order.
I am trying to bring up DP_TX in single lane mode. HPD is working fine, link training is happening properly on AUX channel. But the DP_TX IP is going into VIDEO_IDLE mode instead of NORMAL_VIDEO mode. If IN0-IN2 are not actively driven and only IN3 is driven, does SN75DP propagate it on OUT3?
Regards
Bhargav