Framework method allowing display controller and two-dimensional graphic processor to have access to internal storage through same internal storage controller

Abstract

The invention relates to a framework method allowing a display controller and a two-dimensional graphic processor to have access to an internal storage through the same internal storage controller. The method comprises the first step of creating a framework having access to the internal storage, wherein the framework having access to the internal storage arranged in an SOC general framework comprises the internal storage controller, the two-dimensional graphic processor, a data register, a data selector, a data selection controller and the display controller; the second step of having access to the framework of the internal storage, and giving out flow in and flow out of data according to whether overlaid and mixed multi-layer source images are updated or not, wherein when the multi-layer source images are updated, the data selector enables the two-dimensional graphic processor to be connected with the display controller, and when the multi-layer source images are not updated, the data selector enables the internal storage controller to be connected with the display controller. The framework method allowing the display controller and the two-dimensional graphic processor to have access to the internal storage through the same internal storage controller has the advantages that for the solution of the problem that bandwidth is limited when multiple layers of graphic images are overlapped and mixed in an existing SOC system, the purpose that under the condition that user experience is guaranteed, the system bandwidth and the power consumption can be consumed to the minimum degree in all application scenarios is achieved.

Description

technical field [0001] The invention relates to the field of a multi-layer graphics and image mixed architecture, in particular to an architecture method in which a display controller and a two-dimensional graphics processor access memory through the same memory controller. Background technique [0002] In the existing Android operating system, multi-layer graphics and image mixing is the most important step in the process of system display and graphics and image processing. Multi-layer image mixing is mainly to read video, graphics or desktop background images, and the output has various layers mixed and superimposed The process of taking an image of the effect and transferring it to a display device. There are roughly two types of layer mixing and superimposition and transmission processes: [0003] The first method is to use a two-dimensional graphics processor for multi-layer graphics image blending. In this method, firstly, the drive system sends the position informat...

AI Technical Summary

Problems solved by technology

The software control process of this implementation is relatively simple, but it is necessary to mix and superimpose each frame of the output image

When the displayed image changes infrequently, this method consumes a lot of system bandwidth

Take the high-definition video resolution with a refresh rate of 60 frames as an example, if the display images of the last 30 frames are unchanged, and these 30 images are all mixed and superimposed by the same 3 source images, then each frame Doing one more overlay and mixing will consume 16 megabytes more bandwidth, so this solution will consume 480 megabytes more bandwidth in one second, and the extra 480 megabytes of bandwidth consumption is equivalent to wasting 32% of the bandwidth of the system

The system also consumes power consumption when reading data, wasting 32% of the bandwidth will also cause the DDR system to consume 32% more power consumption

Due to the limitations of architecture and functions, the display controller cannot complete all the functions of overlaying and mixing multi-layer graphics and images, such as image rotation and scaling. This method also has limitations in the use of functions

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