Apple Inc.

Fernando A Urbina

Brett C Bilbrey

Jay Zipnick

Alexei V Ouzilevski

Ian C Hendry

Eric Werner Anderson

Barry Twycross

J Rhoads Hollowell, Ii

Arulchandran Paramasivam

James Hollowell

Harry Guo

Paul M Thompson

Steven J Sfarzo

Arul Paramasivam

Steven Lee

Methods and apparatus for reliable detection and enumeration of devices. In one embodiment, the controller comprises serialized bus protocol (e.g., a Universal Serial Bus (USB)) controller capable of supporting different bus architectures (e.g., USB 2.0 and USB 3.0) of the USB protocol (e.g., eXtensible Host Controller Interface (xHCI) controller). In one variant, when a USB-compliant device is detected over multiple bus architectures of a controller, the controller waits an additional period to allow the device to properly identify which bus architecture to use. After the time period has elapsed, if the device has been determined to be connected over the USB 3.0 bus architecture, the controller waits an additional period of time before enumerating the device. If the device is still present on the USB 3.0 bus architecture, the device continues to enumerate as a USB 3.0 advice to be made available to a host system.

Methods and apparatus for reliable detection and enumeration of devices

The disclosed embodiments provide a system that manages power allocated through a set of bus interfaces on a computer system. During operation, the system obtains a first request for revocable current beyond a reserved current for a first bus interface from the set of bus interfaces, wherein the request is associated with a first device connected to the first bus interface. Next, the system allocates the revocable current to the first bus interface from an extra-current budget for the set of bus interfaces. Upon detecting a connection of a second device that requires non-revocable current over the extra-current budget to a second bus interface from the set of bus interfaces, the system transmits a first notification to the first device to relinquish the revocable current. Finally, the system allocates the non-revocable current to the second device from the relinquished revocable current.

Managing and revoking power allocated through bus interfaces

Systems and techniques for processing sequences of video images involve receiving, on a computer, data corresponding to a sequence of video images detected by an image sensor. The received data is processed using a graphics processor to adjust one or more visual characteristics of the video images corresponding to the received data. The received data can include video data defining pixel values and ancillary data relating to settings on the image sensor. The video data can be processed in accordance with ancillary data to adjust the visual characteristics, which can include filtering the images, blending images, and/or other processing operations.

Video acquisition with processing based on ancillary data

Video acquisition with integrated GPU processing

Methods and apparatus for enhancing efficiency (e.g., reducing power consumption and bus activity) in a data bus. In an exemplary embodiment, methods and apparatus for intelligently trimming (and adding or re-adding) queue heads resident in a host device associated with various client device processes are disclosed. By selectively trimming inactive or dormant queue heads, the host expends less resources and time polling the queue heads during routine operations. Similarly, queue heads which are newly active, or acquired are intelligently added to ensure proper bus operation. Inactive queue heads are brought back into the polling process only when requested, thereby keeping the list of queue heads to be polled or examined as short as possible at all times.

Methods and apparatus for decreasing power consumption and bus activity

A hot-plugging capability for video devices is achieved by shifting the responsibility for recognizing changes in the configuration of a display environment from a computer's operating system to a device manager. When an input/output device is added to or removed from the computer system, an interrupt signal informs a device manager of the fact that a change in configuration has occurred. In response thereto, the device manager determines whether the changed component relates to the computer's display function. If so, the device manager makes a call to the computer's display manager, to inform it of the fact that the display configuration has changed. In response to this call, the display manager reconfigures the display space for the computer system and notifies clients as appropriate, to accommodate display features associated with the added component. With this change in the configuration of the display space, the added component becomes immediately available for use.

System for real-time adaptation to changes in display configuration

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Colorado Springs, CO, United States of America

Fernando A Urbina