DisplayPort config pins should be weakly pulled down, not grounded
The CONFIG1 and CONFIG2 pins of the DisplayPort connector are currently grounded via 0Ω resistors R308 and R309. However, the DisplayPort specification (I checked v1.1a and v1.2) says these pins "must be weakly pulled down with 1MΩ resistors". Grounding CONFIG2 in particular may be hazardous since it may be driven high by a downstream device as part of a detection sequence.
Since there are already resistors in the design, this should be fixable with a simple BOM change.