Qualcomm Incorporated

Chunlin Wang

Jian Liang

Tao Wang

Minjie Huang

Nagarjuna Duvvuru

This disclosure relates to arbitration of different types of requests to access a cache. Features of this disclosure can be implemented in a graphics processing unit (GPU). In one embodiment, an arbiter can receive requests from a color processor and a depth processor and determine which of the received requests has the highest priority. The request with the highest priority can then be provided to the cache. The priority can be configurable. The arbiter can determine priority, for example, based on whether a location in the cache associated with a request is available, a weight associated with the request, a number of requests of a particular type processed by the arbiter, or any combination thereof.

System and method of arbitrating cache requests

This disclosure describes an adaptive memory address scanning technique that defines an address scanning pattern, to be used for a particular surface, based on one or more properties of the surface. In addition, a number, shape, and arrangement of sub-primitives of a surface to process in parallel may be determined. In one example of the disclosure, a memory accessing method for graphics processing comprises, determining, by a graphics processing unit (GPU), properties of a surface, determining, by the GPU, a memory address scanning technique based on the determined properties of the surface, and performing, by the GPU, at least one of a read or a write of data associated with the surface in a memory based on the determined memory address scanning technique.

Adaptive memory address scanning based on surface format for graphics processing

A graphics processing unit (GPU) may include a triangle setup engine (TSE) configured to determine coordinates of a triangle, rotate coordinates of the triangle based on an angle. To rotate the coordinates, the TSE generates coordinates of the triangle in a rotated domain, and determines coordinates of a bounding box in the rotated domain based on the coordinates of the triangle in the rotated domain. The TSE determines a first plurality of parallel scanlines in the rotated domain, and a second plurality of parallel scanlines in the rotated domain. The first and second pluralities of scanlines are perpendicular. The TSE determines whether the bounding box coordinates are located within two adjacent scanlines. If the bounding box coordinates are located within the two adjacent scanlines, the TSE removes the triangle from the scene.

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San Diego, CA, United States of America

Chunlin Wang