Patent ID: 8841886

Claim:
A method comprising: determining, at a high-definition multimedia interface (HDMI) source, if an HDMI sink is configured to use a Hot Plug Detect (HPD) pin for charging; and if the HDMI source determines that the HDMI sink is configured to use the HPD pin for charging, connecting a battery of the HDMI source to the HPD pin of the HDMI source to receive a charging current via the HPD pin of the HDMI source; wherein the HDMI sink is determined to be configured to use the HPD pin for charging when at least one of Extended Display Identification Data (EDID) and Enhanced Extended Display Identification Data (E-EDID) is available for reading, the voltage on the HPD is in the range of 4.75V-5.25V, and up to 500 mA of current is available on the HPD pin.