System and method for providing PCIE over displayport
An apparatus and method is disclosed for providing an extensible information handling system (IHS) bus implemented on predetermined channels of a digital video interface. IHS video signal information is multiplexed with IHS bus information by a host multiplexer for transmission across a digital video connector. The multiplexed IHS video signal and IHS bus information is received by a display multiplexer, where it is demultiplexed. Demultiplexed IHS video signal information is received by a video interface receiver, where it is used to generate an image on a digital display. Demultiplexed IHS bus information is received by a host bus interface transmitter/receiver, where it is used to support peripheral devices attached to the digital display.
1. An information handling system comprising:
a processor configured to generate information;
a video display subsystem interfaced with the processor and configured to process the information into video information for communication to a display;
a host main link interfaced with video display subsystem and configured to connect to a display cable;
a display configured to present the video information as visual images;
a display main link interfaced with the display and configured to connect to a DisplayPort cable having first and second ends, the DisplayPort cable directly connected at the first end to the host main link and directly connected at the second end to the display main link, the DisplayPort cable configured to communicate the video information from the video display subsystem to the display across four serial links; and
a peripheral directly coupled to the display and having associated peripheral information;
wherein the display main link is further configured to communicate the peripheral information through the DisplayPort cable to the host main link, the display main link and host main link cooperating to selectively assign some of the four serial links to communicate the peripheral information while the remaining of the four serial links communicate the video information; and
wherein the video information comprises DisplayPort information and the peripheral information comprises PCIe information.
2. The information handling system of claim 1 further comprising:
a display receiver interfaced with the display main link and configured to receive the video information from the DisplayPort cable;
a peripheral transceiver interfaced with the display main link and configured to communicate peripheral information with the DisplayPort cable; and
a multiplexor disposed between the main link and the display receiver and the peripheral transceiver, the multiplexor configured to manage the interface of the video information and peripheral information through the DisplayPort cable.
3. The information handling system of claim 2 wherein the multiplexor manages the interface of video information and peripheral through a connector by interfacing the display receiver with predetermined of the links and the peripheral transceiver with predetermined of the links.
4. The information handling system of claim 1 further comprising:
an identifier stored on the display; and
logic associated with the video display subsystem, the logic operable to retrieve the identifier and apply the identifier to determine if a display connector includes peripheral information.
5. A method for communicating information comprising:
connecting a DisplayPort cable directly to an information handling system at a first end and directly to a display at a second end;
communicating video information from the information handling system to the display through plural serial links of the DisplayPort cable; and
selectively communicating peripheral information from a peripheral device to the display and then from the display to the information handling system through some but not all of the serial links while the remaining of the serial links continue to communicate video information from the information handling system to the display;
wherein the peripheral information is communicated from the display to the information handling system directly through the display without communication through other cables disposed between the display and information handling system; and
wherein the video information comprises DisplayPort information and the peripheral information comprises PCIe information.
6. The method of claim 5 wherein the DisplayPort cable comprises four serial links and selectively communicating peripheral information further comprises communicating only video information through two of the four serial links and communicating only the peripheral information through the other two of the four serial links.
7. The method of claim 5 further comprising:
retrieving identifier information from the display to the information handling system;
analyzing the identifier information at the information handling system to confirm the availability of peripheral information communication at the display before the selectively communicating the peripheral information.
8. The method of claim 7 wherein the DisplayPort cable comprises a bi-directional auxiliary link and retrieving identifier information comprises retrieving the identifier information through the auxiliary link.
9. A method for communicating information between an information handling system and a display, the method comprising:
generating video information at the information handling system;
generating peripheral information at the display with a peripheral device directly coupled to the display;
connecting a DisplayPort cable directly to the information handling system at a first end and directly to the display at a second end, the DisplayPort cable having plural serial links configured to communicate the video information from the information handling system to the display, the DisplayPort cable traveling directly between the information handling system and display without any intervening cables;
communicating identifier information from the display to the information handling system, the identifier information indicating that the display can multiplex peripheral information with the video information through the DisplayPort cable; and
in response to the identifier information, multiplexing the peripheral information through at least some of the DisplayPort cable serial links to communicate the peripheral information from the display to the information handling system;
wherein the video information comprises DisplayPort information and the peripheral information comprises PCIe information.
10. The method of claim 9 wherein multiplexing comprises communicating video information over less than all serial links of the DisplayPort cable and sending peripheral information over the remaining serial links of the DisplayPort cable.
11. The method of claim 10 wherein the DisplayPort cable has four serial links, communicating video information over less than all serial links comprises communicating video information over two of the four serial links, and sending peripheral information over the remaining serial links comprises sending peripheral information over the other two of the four serial links.
12. The method of claim 9 wherein communicating identifier information further comprises communicating identifier information across a bi-directional auxiliary link of the DisplayPort cable.