A Multimode DisplayPort source can transmit DVI and HDMI signals as well. The question that arises is how to differentiate between the two when a monitor or any other display interface is plugged in. There is a feature called HDMI dongle detect mandated by the spec that solves this problem. Dongle detect occurs over an I2C bus where a ROM on the slave side will respond to the HDMI dongle detect request. Hence, for all the dongles that have HDMI output, it is mandatory for them to have HDMI dongle detect by which the source would know that an HDMI sink has been plugged in and it needs to transmit HDMI data and not DVI. NXP has a solution that incorporates this detection feature and hence is suitable for DVI as well as HDMI dongles.