US 2020/0288068 A1 · DEVICES, SYSTEMS, AND METHODS FOR INSTANT VIDEO SWITCHING IN AN EXTENSION ENVIRONMENT

Abstract

Extension devices such as upstream facing port devices (UFP devices) and downstream facing port devices (DFP devices) connect via an extension medium. When a UFP device and a DFP device pair with each other, DisplayPort video and/or audio information from a DisplayPort source device can be presented by a DisplayPort sink device, which are coupled to the UFP device and DFP device, respectively. In some embodiments, the DFP device may train a DisplayPort link to the DisplayPort sink device regardless of whether it is receiving actual data from a UFP device, and may provide placeholder data to the DisplayPort sink device in order to keep the link active. The DFP device may then replace the placeholder data with the actual data from the UFP device, once received, and may thereby seamlessly switch the DisplayPort sink device from presenting placeholder data to presenting data from the DisplayPort source device.

Claims18

Dependent claims

A method of switching DisplayPort connections over an extension medium, the method comprising:

conducting, by a downstream facing port (DFP) device, link training with a DisplayPort sink device coupled to the DFP device;
transmitting, by the DFP device, DisplayPort data to the DisplayPort sink device that includes first actual video data received from an extension medium by the DFP device, wherein the first actual video data is received from a first extension device connected to a first DisplayPort source device;
receiving, by the DFP device, a command to pair to a second extension device connected to a second DisplayPort source device;
and
transmitting, by the DFP device, DisplayPort data that includes second actual video data received from the second extension device instead of the first actual video data to the DisplayPort sink device without re-training the link between the DFP device and the DisplayPort sink device.

2 more elements

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

an extension interface;
a DisplayPort interface configured to receive actual video data from the extension interface, wherein the actual video data is generated by a DisplayPort source device;
and
a downstream video engine configured to:
conduct link training with a DisplayPort sink device coupled to the DisplayPort interface;
transmit DisplayPort data that includes first actual video data to the DisplayPort sink device, wherein the first actual video data is received from a first extension device connected to a first DisplayPort source device;
receive a command to pair to a second extension device connected to a second DisplayPort source device;
and
transmit DisplayPort data that includes second actual video data received from the second extension device instead of the first actual video data to the DisplayPort sink device without re-training the link between the DFP device and the DisplayPort sink device.

6 more elements

A non-transitory computer-readable medium having computer-executable instructions stored thereon that, in response to execution by one or more processors of a downstream facing port (DFP) device, cause the DFP device to perform actions for switching DisplayPort connections over an extension medium, the actions comprising:

conducting, by the DFP device, link training with a DisplayPort sink device coupled to the DFP device;
transmitting DisplayPort data to the DisplayPort sink device that includes first actual video data received from an extension medium by the DFP device, wherein the first actual video data is received from a first extension device connected to a first DisplayPort source device;
receiving, by the DFP device, a command to pair to a second extension device connected to a second DisplayPort source device;
and
transmitting, by the DFP device, DisplayPort data that includes second actual video data received from the second extension device instead of the first actual video data to the DisplayPort sink device without re-training the link between the DFP device and the DisplayPort sink device.

2 more elements

Dependencies are inferred from the claim text.

Devices, systems, and methods for instant video switching in an extension environment

Life of this patent

Devices, systems, and methods for instant video switching in an extension environment

Life of this patent

Abstract

Claims18