Codec Memory Management(CMM) User`s Manual (Linux)
Contents
1. ELECTRONICS Codec Memory Management CMM User s Manual Linux 53C6400 6410 August 26 2008 REV 1 11 Important Notice The information in this publication has been carefully checked and is believed to be entirely accurate at the time of publication Samsung assumes no responsibility however for possible errors or omissions or for any consequences resulting from the use of the information contained herein Samsung reserves the right to make changes in its products or product specifications with the intent to improve function or design at any time and without notice and is not required to update this documentation to reflect such changes This publication does not convey to a purchaser of semiconductor devices described herein any license under the patent rights of Samsung or others Samsung makes no warranty representation or guarantee regarding the suitability of its products for any particular purpose nor does Samsung assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation any consequential or incidental damages 53 6400 6410 RISC Microprocessor CMM User s manual Copyright 2008 Samsung Electronics Co Ltd All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electric or mechanical by photocopying recording or o2. FIG_RES CONFIG_RE CONFIG RE CONFIG_RESER EM_JPEG CONFIG_RESERVED 5 e CONFIG RESERVED MEM_CMM_JPEG ER ED ED 4 2 CMM driver module compilation Node name dev misc s3c cmm Major number 10 Minor number 250 1 how to make device node root localhost CMM mknod dev misc s3c cmm 10 250 2 module compilation root localhost cmm_drv make 4 3 Test application compilation root localhost cmm_app make 4 4 Insert module and execute binary in Target side Below commands are executed target side root Samsung cmm_drv insmod s3c_cmm ko root Samsung cmm_drv cd cmm_app root Samsung cmm_app cmm_test ELECTRONICS
3. dress is surely cacheable area So s w decoder can utilize cache After decoding the player request for CMM to flush cached area And then the player request physical address of YUV buffer to CMM With the physical address the player calls video driver API for rendering YUV data is transferred to h w post processor by DMA It does not only reduce memcpy time but also make player to decode and render at the same time Because rendering is done by only h w decoding performance is not decreased You should make decoding and rendering as multi threaded There are 2 methods to render YUV data The one is using local path between h w post processor and LCD It doesn t posses data BUS But local path only supports RGB888 The other is using DMA between post processor and LCD Post Processor Scaling amp CSC Multimedia Player Bus Phy addr YUV buffer Figure Architecture of CMM API ELECTRONICS CMM User s Manual 3 Package Guidelines 3 1 Directory Structure Directory Files Description cmm_app c CMM test file cmm_drv Device Driver file doc doc pdf CMM documents ELECTRONICS CMM User s Manual 4 How to Test CMM 4 1 Kernel Build Before kernel compilation you must setup memory layout below figure in include asm arm arch 53 2410 reserved mem h file gt CONFIG_RES gt CONFIG_R gt CONFIG CONFIG ONF IG CONFIG RE ON
4. e CMM API for easy portability into different platforms by developers 1 2 Scope The scope of this document isto describe e Software architecture of CMM e Usage of CMM API e How to use CMM driver 1 3 Intended Audience Intended Audience Tick whenever Applicable Project Manager Yes Project Leader Yes Project Team Member Yes Test Engineer Yes 1 4 Definitions Acronyms and Abbreviations Abbreviations Description CMM Codec Memory Management API Application Program Interface 1 5 References Number Reference Description 1 SMDK6400_WinCE6 0_FMD_PortingGuide doc OS porting guide 2 SMDK6400_WinCE6 0 VideoDriver_UserManual doc Video Driver specification 3 53 6400 6410 Linux2 6 21_CMM_UserManual_REV1 00_20080705 doc CMM v1 00 user s manual Confidential Property of Samsung Electronics Co Ltd SoC development Dep System LSI CMM User s Manual 2 Software Architecture 2 1 Overview When multimedia player use s w decoder Performance problem is often issued CMM Codec Memory Management driver helps to improve rendering performance In common multimedia player Decoded YUV data is transferred to video memory using memcpy It decreases much performance when the resolution of movie is large CMM Driver provides the interface to transfer decoded YUV data to video memory directly At first It allocates virtual address to the player The virtual ad
5. elopment for which full characterization data and associated errata are not yet available ELECTRONICS Specifications and information herein are subject to change without notice Revision History Revision No Description of Change Refer to Author s Date 1 00 Initial Version Jiun Yu 2008 07 05 1 10 Node name is changed Jiun Yu 2008 07 19 1 11 New ioctl s command is added Jiun Yu 2008 08 26 CMM User s Manual Contents 1 1 aii 1 12 1 3 INTENDED AUDIENCE 5 1 4 DEFINITIONS ACRONYMS AND ABBREVIATIONS 1 5 EAER A E E S E ERBE 2 1 OVERVIEW AA 1 3 1 DIRECTORY STRUCTURE dae 2 4 1 KERNEBBUIED 25 tios de 4 2 CMM DRIVER MODULE 2 2 2 602000101000000000000000000000000200000000 00 4 3 TEST APPLICATION COMPILATION ccessessscecececeessnsececcesceesesuaesecececeeseeaeceeececsesssaesecececeesesaeseseeeeeessaeaeees 4 4 INSERT MODULE AND EXECUTE BINARY TARGET SIDE ELECTRONICS CMM User s Manual 1 Introduction 1 1 Purpose The purpose of the document isto describe th
6. therwise without the prior written consent of Samsung Electronics Ltd Samsung Electronics Co Ltd San 24 Nongseo Dong Giheung Gu Yongin City Gyeonggi Do Korea 446 711 Home http www samsungsemi com E Mail mobilesol cs samsung com Printed in the Republic of Korea Typical parameters and do vary in different applications All operating parameters including Typicals must be validated for each customer application by the customer s technical experts Samsung products are not designed intended or authorized for use as components in systems intended for surgical implant into the body for other applications intended to support or sustain life or for any other application in which the failure of the Samsung product could create a situation where personal injury or death may occur Should the Buyer purchase or use a Samsung product for any such unintended or unauthorized application the Buyer shall indemnify and hold Samsung and its officers employees subsidiaries affiliates and distributors harmless against all claims costs damages expenses and reasonable attorney fees arising out of either directly or indirectly any claim of personal injury or death that may be associated with such unintended or unauthorized use even if such claim alleges that Samsung was negligent regarding the design or manufacture of said product Preliminary product information describe products that are in dev
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