摘要:
In an embodiment, a control circuit is configured to transmit operations to a circuit block that is being powered up after being powered down, to reinitialize the circuit block for operation. The operations may be stored in a memory (e.g. a set of registers) to which the control circuit is coupled. In an embodiment, the control circuit may also be configured to transmit other operations from the memory to the circuit block prior to the circuit block being powered down. Accordingly, the circuit block may be powered up or powered down even during times that the processors in the system are powered down (and thus software is not executable at the time), without waking the processors for the power up/power down event. In an embodiment, the circuit block may be a cache coupled to the one or more processors.
摘要:
A graphics system may include one or more processing units for processing a current display frame, each processing unit including a plurality of parameter registers for storing parameter settings used in processing the current display frame. A parameter buffer in the graphics system may store frame packets, with each frame packet containing information corresponding to parameter settings to be used for at least one display frame. A control circuit coupled to the buffer and to the one or more processing units may retrieve and process a top frame packet from the parameter buffer to update one or more of the parameter registers according to the contents of the top frame packet. The control circuit may issue DMA requests to fill the parameter buffer with frame packets transferred from system memory, where the frame packets may be written by an application (or software) executing on a central processing unit.
摘要:
Various techniques are provided for processing image data acquired using a digital image sensor. In accordance with aspects of the present disclosure, one such technique may relate to the processing of image data in a system that supports multiple image sensors. In one embodiment, the image processing system may include control circuitry configured to determine whether a device is operating in a single sensor mode (one active sensor) or a dual sensor mode (two active sensors). When operating in the single sensor mode, data may be provided directly to a front-end pixel processing unit from the sensor interface of the active sensor. When operating in a dual sensor mode, the image frames from the first and second sensors are provided to the front-end pixel processing unit in an interleaved manner. For instance, in one embodiment, the image frames from the first and second sensors are written to a memory, and then read out to the front-end pixel processing unit in an interleaved manner.
摘要:
Systems and methods for coordinating performance parameters in multiple domains are described. In an embodiment, a method includes receiving a request to change a state of an electronic circuit, where the circuit includes a first domain and a second domain, causing a first parameter of a first circuit serving the first domain to be modified to a first modified parameter based on the request, and causing a second parameter of a second circuit serving the second domain to be modified to a second modified parameter based on the request. In some cases, a parameter may include a clock frequency. In other cases, a parameter may include a voltage. In some embodiments, a system may be implemented as a logic circuit and/or as a system-on-a-chip (SoC). Devices suitable for using these systems include, for example, desktop and laptop computers, tablets, network appliances, mobile phones, personal digital assistants, e-book readers, televisions, and game consoles.
摘要:
In an embodiment, a power management unit (PMU) may automatically transition (in hardware) the performance states of one or more performance domains in a system. The target performance states to which the performance domains are to transition may be programmable in the PMU by software, and software may signal the PMU that a processor in the system is to enter the sleep state. The PMU may control the transition of the performance domains to the target performance states, and may cause the processor to enter the sleep state. In an embodiment, the PMU may be programmable with a second set of target performance states to which the performance domains are to transition when the processor exits the sleep state. The PMU may control the transition of the performance domains to the second targeted performance states and cause the processor to exit the sleep state.
摘要:
Various techniques are provided for processing image data acquired using a digital image sensor. In accordance with aspects of the present disclosure, one such technique may relate to the processing of image data in a system that supports multiple image sensors. In one embodiment, the image processing system may include control circuitry configured to determine whether a device is operating in a single sensor mode (one active sensor) or a dual sensor mode (two active sensors). When operating in the single sensor mode, data may be provided directly to a front-end pixel processing unit from the sensor interface of the active sensor. When operating in a dual sensor mode, the image frames from the first and second sensors are provided to the front-end pixel processing unit in an interleaved manner. For instance, in one embodiment, the image frames from the first and second sensors are written to a memory, and then read out to the front-end pixel processing unit in an interleaved manner.
摘要:
A system and method is disclosed for efficiently managing power distribution among the various functional blocks used within portable electronic devices. The method includes allowing each functional block to be independently controlled, containing its own low-level software and power controls for setting the local power state of the functional block. For each power control domain in the implementation, hardware uses these local power states and sets the actual operating state of the power control domain accordingly.
摘要:
In an embodiment, a cache stores tags for cache blocks stored in the cache. Each tag may include an indication identifying which of two or more replacement policies supported by the cache is in use for the corresponding cache block, and a replacement record indicating the status of the corresponding cache block in the replacement policy. Requests may include a replacement attribute that identifies the desired replacement policy for the cache block accessed by the request. If the request is a miss in the cache, a cache block storage location may be allocated to store the corresponding cache block. The tag associated with the cache block storage location may be updated to include the indication of the desired replacement policy, and the cache may manage the block in accordance with the policy. For example, in an embodiment, the cache may support both an LRR and an LRU policy.
摘要:
A method and system is disclosed for improving the response time of displays, such as liquid crystal displays (LCDs). The method includes receiving a target picture frame and comparing it to a current picture frame. If the comparison shows that a display may be unable to transition from a current pixel intensity level to a target pixel intensity level within a specified time period, then the pixels that correspond to those current pixel intensities that may not be reach target pixel intensities may be overdriven. This overdriving of one or more pixels may allow the pixel to reach the target pixel intensity within the specified time period.
摘要:
A method and system is disclosed for transforming of data by a DMA controller without first saving the transmitted data on an intermediate medium. The method includes the DMA controller accessing data for transfer between an origination location in the system and a destination location in the system. The accessed data is passed through the DMA controller before being sent to the destination location. While the data is being passed through the DMA controller, it is transformed into a modified state. This transformation may include encryption or decryption of the data. The transformation may also include adding error correction bits to the data through an encoding process or decoding previously encoded data. Upon completion of the transformation, the data is sent directly to a prescribed destination location, typically either a memory circuit or an I/O device. Also disclosed is a DMA controller capable of performing the data transformation.