Jetson TK1: 2 Lane Displayport Configuration

How do you configure the Jetson TK1 to use 2 lanes for Displayport instead of 4 lanes. Have displayport working for 4 lanes and tried to connect to a display that only uses two lanes. I get an error message DP:Channel Equalization failed. Resolution is 1920x1080 60Hz. tegra_dp_channel_eq( ) in source file dc/dp.c is called to check the equalization status and it loops for “n_lanes” which is set to a value of 2 and sets ce_done to false if either lane status (NV_DPCD_LANE0_1_STATUS) is not as expected. The first loop passes, the 2nd loop fails.

What display or panel do you use?