CA 95035 VESA DisplayPort Standard

DisplayPort v1.1a 标准说明文件 VESA DisplayPort Standard Version 1.1a Copyright
Standards Association 920 Hillview Court， Suite 140 Milpitas， CA 95035 VESA Video

Purpose
The purpose of this document is to define a flexible system and apparatus capable of transporting video, audio
and other data between a Source Device and a Sink Device over a digital communications interface.
Summary
The DisplayPort™ standard specifies an open digital communications interface for use in both internal
connections, such as interfaces within a PC or monitor, and external display connections. Suitable external
display connections include interfaces between a PC and monitor or projector, between a PC and TV, or
between a device such as a DVD player and TV display.
DisplayPort Ver.1.1a is revised to correct errata items in and add clarifications to DisplayPort Standard
Version 1, Revision 1.
DisplayPort Ver. 1.2 is revised to add enhancements including higher speed operation, more flexible topology
management, multiple streams on a single connection, higher speed Auxiliary Channel communications,
improved support for audio, and a new smaller connector. It also corrects errata items in and adds
clarifications to DisplayPort Standard Version 1, Revision 1a. VESA DisplayPort Standard MEMBER USE ONLY. DISTRIBUTION TO NON-MEMBERS IS PROHIBITED. Ver.1.2
©Copyright 2007-2010 Video Electronics Standards Association Page 2 of 515
Table of Contents
Preface ...............................................................................................................................................................15
Acknowledgements............................................................................................................................................17
Revision History ................................................................................................................................................20
1 Introduction .................................................................................................................................................21
1.1 DisplayPort Standard Organization ......................................................................................................21
1.2 DisplayPort Objectives .........................................................................................................................21
1.2.1 Key Industry Needs for DisplayPort..............................................................................................................22
1.2.2 DisplayPort Technical Objectives..................................................................................................................22
1.2.3 DisplayPort External Connection Objectives.................................................................................................23
1.2.4 DisplayPort Internal Connection Objectives..................................................................................................24
1.2.5 DisplayPort CE Connection Objectives.........................................................................................................24
1.2.6 Content Protection for DisplayPort................................................................................................................24
1.3 Acronyms..............................................................................................................................................24
1.4 Glossary ................................................................................................................................................27
1.5 Reference Documents ...........................................................................................................................31
1.6 Nomenclature for Bit and Byte Ordering..............................................................................................32
1.6.1 Bit Ordering ...................................................................................................................................................32
1.6.2 Byte Ordering ................................................................................................................................................33
1.7 Overview of DisplayPort ......................................................................................................................34
1.7.1 Make-up of the Main Link.............................................................................................................................34
1.7.2 Make-up of AUX CH.....................................................................................................................................35
1.7.3 Link Configuration and Management ............................................................................................................35
1.7.4 Layered, Modular Architecture......................................................................................................................36
2 Link Layer ...................................................................................................................................................37
2.1 SST Mode Introduction.........................................................................................................................37
2.1.1 Number of Lanes and Per-lane Data Rate (Applicable both in SST and MST Modes) .................................38
2.1.2 Number of Main, Uncompressed Video Streams in SST Mode ....................................................................38
2.1.3 Basic Functions (Applicable both in SST and MST Modes) .........................................................................38
2.1.4 DisplayPort Device Types and Link Topology in SST Mode........................................................................38
2.2 Isochronous Transport Services in SST Mode......................................................................................43
2.2.1 Main Stream to Main Link Lane Mapping in the Source Device ..................................................................43
2.2.2 Stream Reconstruction in the Sink.................................................................................................................71
2.2.3 Stream Clock Recovery .................................................................................................................................72
2.2.4 Main Stream Attribute Data Transport ..........................................................................................................74
2.2.5 Secondary-data Packing Formats...................................................................................................................79
2.2.6 ECC for Secondary-data Packet...................................................................................................................101
2.3 AUX CH States and Arbitration .........................................................................................................107
2.3.1 AUX CH STATES Overview......................................................................................................................107
2.3.2 Link Layer Arbitration Control....................................................................................................................111
2.3.3 Policy Maker AUX CH Management ..........................................................................................................111
2.3.4 Detailed uPacket TX AUX CH State Description .......................................................................................112
2.3.5 Detailed uPacket RX AUX CH State Description .......................................................................................113
2.4 Overview of DP Multi-Stream Transport (MST) Isochronous Transport Service..............................114
2.4.1 Connection-oriented Transport ....................................................................................................................115
2.4.2 Layers of DP Isochronous Transport Service ..............................................................................................117
2.4.3 Sideband CH Communications....................................................................................................................121
2.5 Topology Management Layer.............................................................................................................122
2.5.1 Primitives of MST DP Devices and Device Types ......................................................................................122
2.5.2 MST Topologies ..........................................................................................................................................125
2.5.3 MST Device Identification...........................................................................................................................126
2.5.4 Topology Manager and Topology Assistant ................................................................................................127