Decoupling link training for a video source and video sink in an extension environment

A downstream facing port device (DFP device), comprising:

• a first interface configured to be communicatively coupled to an extension medium;
• a second interface configured to be communicatively coupled to a DisplayPort sink device;
• and
• logic that, in response to execution by the DFP device, causes the DFP device to perform actions comprising:
• conducting link training with the DisplayPort sink device using first DisplayPort configuration data (DPCD), wherein the first DPCD is associated with the DisplayPort sink device;
• receiving video data via the first interface, wherein the video data is extracted from DisplayPort data received by an upstream facing port device (UFP device) over a link trained using second DisplayPort configuration data (DPCD);
• generating DisplayPort data as specified by the first DPCD, wherein the generated DisplayPort data includes the video data;
• and
• transmitting the DisplayPort data to the DisplayPort sink device as specified by the first DPCD;
• wherein the first DPCD is different from the second DPCD.

A non-transitory computer-readable medium having computer-executable instructions stored thereon that, in response to execution by a downstream facing port device (DFP device), cause the DFP device to perform actions comprising:

• conducting link training with the DisplayPort sink device using first DisplayPort configuration data (DPCD), wherein the first DPCD is associated with the DisplayPort sink device;
• receiving video data from an extension interface, wherein the video data is extracted from DisplayPort data received by an upstream facing port device (UFP device) over a link trained using second DisplayPort configuration data (DPCD);
• generating DisplayPort data as specified by the first DPCD, wherein the generated DisplayPort data includes the video data;
• and
• transmitting the DisplayPort data to the DisplayPort sink device as specified by the first DPCD;
• wherein the first DPCD is different from the second DPCD.