Allwinner A20 - 5.3. Display Engine Frontend

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 477 / 812
5.3. Display Engine Frontend
5.3.1. Overview
The DEFE performs image capture/driver, video/graphic scaling, format conversion and color space
conversion. It is composed of DMA controller, input controller, deinterlacing, scaler, color space
conversion, post process and output controller.
The DEFE features:
 Support interlace/progressive output scan types
 De-interlace method: weave/bob/motion-adaptive/motion-adaptive-bob
 Input format: YUV444/YUV422/YUV420/YUV411/RGB
 Direct display output format: RGB
 Write back output format: RGB/YUV444/YUV420/YUV422/YUV411
 3-channel scaling pipelines for scaling up/down
 Programmable source image size from 8x4 to 8192x8192 resolution
 Programmable destination image size from 8x4 to 8192x8192 resolution
 8 tap scale filter in horizontal and 4 tap in vertical direction
 32 programmable coefficients for each tap
 Color space conversion between YUV and RGB
 Output support directly display and write back to memory
 Input support from DRAM, DEBE and interface of LCD with DEBE
 Support 3D format content input/output format convert/display(including HDMI)