Systems and methods for shadowing an HDA codec

An audio amplification system comprising:

• a High Definition Audio (HDA) bus;
• an HDA controller coupled to the HDA bus;
• a first HDA codec coupled to the HDA bus;
• and
• a shadow HDA codec coupled to the HDA bus;
• wherein the HDA controller is configured to convey audio data and commands to the first HDA codec, and wherein the first HDA codec is configured to process the audio data and commands and generate a first audio output therefrom;
• wherein the shadow HDA codec is configured to snoop the audio data and commands conveyed to the first HDA codec from the HDA bus, and to process the audio data and commands and generate a second audio output therefrom;
• and
• wherein the first HDA codec is configured to request enumeration from the HDA controller in response to assertion of a reset signal, and the shadow codec is configured to not request enumeration from the HDA controller in response to assertion of the reset signal.

An audio amplification system comprising:

• a High Definition Audio (HDA) bus;
• an HDA controller coupled to the HDA bus;
• a first HDA codec coupled to the HDA bus;
• and
• a shadow HDA codec coupled to the HDA bus;
• wherein the HDA controller is configured to convey audio data and commands to the first HDA codec, and wherein the first HDA codec is configured to process the audio data and commands and generate a first audio output therefrom;
• wherein the shadow HDA codec is configured to snoop the audio data and commands conveyed to the first HDA codec from the HDA bus, and to process the audio data and commands and generate a second audio output therefrom;
• and
• wherein the shadow codec is configured to not respond to commands to the first HDA codec that request information from the first HDA codec.

A device comprising:

• a shadow High Definition Audio (HDA) codec;
• wherein the shadow HDA codec is configured to be coupled to an HDA bus;
• wherein the shadow HDA codec is configured to snoop audio data and commands conveyed by an HDA controller to a target HDA codec over the HDA bus, and to process the audio data and commands and generate a shadow audio output therefrom;
• wherein the HDA controller, which conveys the audio data and commands to the target HDA codec over the HDA bus, is not aware of the shadow HDA codec;
• and
• wherein the shadow HDA codec does not communicate with the HDA controller.

A device comprising:

• a shadow High Definition Audio (HDA) codec;
• wherein the shadow HDA codec is configured to be coupled to an HDA bus;
• wherein the shadow HDA codec is configured to snoop audio data and commands conveyed to a target HDA codec over the HDA bus, and to process the audio data and commands and generate a shadow audio output therefrom;
• and
• wherein the shadow codec is configured to not request enumeration from an HDA controller in response to assertion of an HDA reset signal.

A device comprising:

• a shadow High Definition Audio (HDA) codec;
• wherein the shadow HDA codec is configured to be coupled to an HDA bus;
• wherein the shadow HDA codec is configured to snoop audio data and commands conveyed to a target HDA codec over the HDA bus, and to process the audio data and commands and generate a shadow audio output therefrom;
• and
• wherein the shadow codec is configured to not place any data on the HDA bus.

A device comprising:

• a shadow High Definition Audio (HDA) codec;
• wherein the shadow HDA codec is configured to be coupled to an HDA bus;
• wherein the shadow HDA codec is configured to snoop audio data and commands conveyed to a target HDA codec over the HDA bus, and to process the audio data and commands and generate a shadow audio output therefrom;
• and
• wherein the shadow codec is configured to not respond to commands to the target HDA codec that request information from the target HDA codec.

A method implemented in an audio amplification system comprising:

• communicating data and commands from a High Definition Audio (HDA) controller to a target HDA codec over an HDA bus;
• a shadow HDA codec snooping the data and commands communicated to the target HDA codec over the HDA bus;
• the target HDA codec processing the audio data and commands to generate a first audio output;
• the shadow HDA codec processing the snooped audio data and commands to generate a second audio output;
• the HDA controller not being aware of the shadow HDA codec;
• and
• the shadow HDA codec not communicating with the HDA controller.

A method implemented in an audio amplification system comprising:

• communicating data and commands from a High Definition Audio (HDA) controller to a target HDA codec over an HDA bus;
• a shadow HDA codec snooping the data and commands communicated to the target HDA codec over the HDA bus;
• the target HDA codec processing the audio data and commands to generate a first audio output;
• and
• the shadow HDA codec processing the snooped audio data and commands to generate a second audio output;
• the HDA controller asserting a reset signal;
• the target HDA codec requesting enumeration from the HDA controller in response to the reset signal;
• and
• the shadow HDA codec not requesting enumeration from the HDA controller in response the reset signal.

A method implemented in an audio amplification system comprising:

• communicating data and commands from a High Definition Audio (HDA) controller to a target HDA codec over an HDA bus;
• a shadow HDA codec snooping the data and commands communicated to the target HDA codec over the HDA bus;
• the target HDA codec processing the audio data and commands to generate a first audio output;
• and
• the shadow HDA codec processing the snooped audio data and commands to generate a second audio output;
• the shadow codec taking no action in response to commands to the target HDA codec that request information from the target HDA codec.