Packet-based digital display interface signal mapping to micro serial interface
First Claim
1. A multimedia data source device, comprising:
- a memory to store power level information describing operating power levels supported by the multimedia data source device;
power level determination circuitry to negotiate a power level to be received from an external display device into the multimedia data source device to enable operation of the multimedia data source device at a negotiated power level, the power level negotiated based on the stored information;
a multimedia data processor to provide multimedia data and to operate using power at the negotiated power level from the external display device; and
an interface system to couple with the external display device, the interface system including;
a main data link to transmit the multimedia data between the multimedia data source device and the external display device;
a power connector to receive the power at the negotiated power level from the external display device when said external display device is connected with the multimedia data source device; and
an auxiliary channel to transmit sideband data between the external display device and the multimedia data source device, said sideband data including power negotiation messages, wherein the power level determination circuitry enables the multimedia data source device to;
obtain from the external display device power level information concerning power levels supported by the external display device;
compare the power level information obtained from the external display device with the power level information stored in the memory of the multimedia data source device; and
negotiate, based on the compared power level information, a power level for use that is a power level supported by both the external display device and by the multimedia data source device.
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Accused Products
Abstract
A passive cable adaptor for connecting a data source device with a display device is described. The adaptor has a packet-based interface connector at one end, the connector having a positive main link pin, a negative main link pin, a positive auxiliary channel pin, and a negative auxiliary channel pin. At the other end is a micro serial interface connector, wherein multimedia content is transmitted over the cable adaptor and electrical power is supplied over the cable adaptor simultaneously. The cable adaptor has an auxiliary and hot plug detect (HPD) controller utilized to map the auxiliary channel and HPD signals of the packet-based digital display to the micro serial interface ID signal.
39 Citations
16 Claims
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1. A multimedia data source device, comprising:
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a memory to store power level information describing operating power levels supported by the multimedia data source device; power level determination circuitry to negotiate a power level to be received from an external display device into the multimedia data source device to enable operation of the multimedia data source device at a negotiated power level, the power level negotiated based on the stored information; a multimedia data processor to provide multimedia data and to operate using power at the negotiated power level from the external display device; and an interface system to couple with the external display device, the interface system including; a main data link to transmit the multimedia data between the multimedia data source device and the external display device; a power connector to receive the power at the negotiated power level from the external display device when said external display device is connected with the multimedia data source device; and an auxiliary channel to transmit sideband data between the external display device and the multimedia data source device, said sideband data including power negotiation messages, wherein the power level determination circuitry enables the multimedia data source device to; obtain from the external display device power level information concerning power levels supported by the external display device; compare the power level information obtained from the external display device with the power level information stored in the memory of the multimedia data source device; and negotiate, based on the compared power level information, a power level for use that is a power level supported by both the external display device and by the multimedia data source device. - View Dependent Claims (2, 3, 4)
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5. A method to enable transmission of negotiated power to a multimedia data source device from an external display device connected to the multimedia data source device, the method comprising:
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storing, on the multimedia data source device, power level information describing operating power levels supported by the multimedia data source device; establishing a connection between the multimedia data source device and the external display device, the established connection including a power connection and an auxiliary data connection; negotiating a power level for power transmission from the external display device to the multimedia data source device to enable operation of the multimedia data source, wherein the negotiating includes; obtaining from the external display device power level information describing power levels supported by the external display device; comparing the power level information obtained from the external display device with the power level information stored on the multimedia data source device; and selecting, based on the compared power level information, a power level for use that is a power level supported by both the external display device and by the multimedia data source device; and supplying power at the selected power level from the external display device to the source device. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A non-transitory computer-readable storage medium whose stored contents configure a multimedia data source device that is connected to an external display device to perform a method, the method comprising:
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negotiating a level of power that the external display device will supply to the multimedia data source device to enable operation of the multimedia data source, the negotiating including; obtaining from the external display device power level information describing power levels supported by the external display device; retrieving stored power level information describing operating power levels supported by the multimedia data source device; comparing the power level information obtained from the external display device with the power level information stored on the multimedia data source device; and selecting, based on the compared power level information, a power level for use that is a power level supported by both the external display device and by the multimedia data source device; and receiving power at the selected level of power from the external display device. - View Dependent Claims (13, 14, 15, 16)
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Specification