Patent ID: 8856744

Claim:
A system comprising: an high definition multimedia interface (HDMI) cable including; a pull up from a hot plug detect (HPD) line of the HDMI cable to a power line of the HDMI cable; a static memory on a serial clock line (SCL) of the HDMI cable and serial data line (SDA) of the HDMI cable, wherein the static memory includes an extended display identification data (EDID) code indicating a debug cable or debug host device; a serial input (RXD) line of the cable; and a serial output (TXD) line of the HDMI cable; and an HDMI controller including: an HDMI module communicatively coupled to the HPD line, a display data channel bus, the SCL, and SDA of the electrical HDMI cable, wherein the HDMI module reads the EDID code when a hot plug device signal is detected on the HPD line and wherein the HDMI module disables the display data channel bus if the EDID code indicates a debug cable or debug host device.