VESA DisplayPort Standard MEMBER USE ONLY. DISTRIBUTION TO NON-MEMBERS IS PROHIBITED. Ver.1.2
©Copyright 2007-2010 Video Electronics Standards Association Page 3 of 515
2.5.5
Topology Discovery.....................................................................................................................................128
2.5.6 Topology Maintenance ................................................................................................................................128
2.5.7 Topologies with SST-only Source devices ..................................................................................................129
2.5.8 Loop Handling .............................................................................................................................................129
2.6 Multi-Stream Transport Operation......................................................................................................131
2.6.1 Link Timing Generation Based on Multi-Stream Transport Packet ............................................................135
2.6.2 Symbol Sequence Mapping into VC Payload..............................................................................................136
2.6.3 Time Slot Count Allocation to VC Payload.................................................................................................144
2.6.4 VC Payload Allocation Synchronization Management................................................................................150
2.6.5 ALLOCATE_PAYLOAD Timing Sequence...............................................................................................154
2.6.6 Impacts of Various Events on VC Payload ID Table...................................................................................161
2.6.7 Robustness Requirement..............................................................................................................................164
2.6.8 Control Functions, Control Symbols and K-Code Assignment ...................................................................164
2.6.9 Conversion Between MST and SST Symbol Mapping................................................................................166
2.6.10 MTPH Usages for CP Extension in MST Mode .........................................................................................167
2.7 AUX Transaction Syntax in Manchester Transaction Format ............................................................170
2.7.1 Command definition ....................................................................................................................................171
2.7.2 AUX Transaction Response/Reply Time-outs.............................................................................................173
2.7.3 Native AUX Request Transaction Syntax....................................................................................................173
2.7.4 Native AUX Reply Transaction Syntax.......................................................................................................174
2.7.5 I
2
C Bus Transaction Mapping onto AUX Syntax ........................................................................................174
2.7.6 Conversion of I
2
C Transaction to Native AUX Transaction (Informative) .................................................192
2.7.7 I
2
C-overAUX Transaction Clarifications and Implementation Rules..........................................................192
2.8 Transaction Syntax in FAUX Transaction Format .............................................................................202
2.9 AUX CH Services...............................................................................................................................203
2.9.1 Stream Transport Initiation Sequence..........................................................................................................203
2.9.2 Stream Transport Termination Sequence.....................................................................................................204
2.9.3 AUX Link Services......................................................................................................................................205
2.9.4 AUX Device Services..................................................................................................................................253
2.10 Protocol Differentiation for Embedded DisplayPort (eDP) ................................................................255
2.10.1 Overview.....................................................................................................................................................255
2.10.2 Protocol Differentiation Methods................................................................................................................255
2.10.3 eDP Source Behavior (Informative)............................................................................................................255
2.10.4 Symbol Error Rate Measurement Pattern Output (Informative) .................................................................256
2.11 Messaging AUX Client.......................................................................................................................258
2.11.1 Messaging AUX Client Layers ...................................................................................................................259
2.11.2 Message Transaction Layer.........................................................................................................................260
2.11.3 Sideband MSG Layer..................................................................................................................................268
2.11.4 AUX CH Support for Messaging AUX Client............................................................................................273
2.11.5 RAD (Relative Address) Updated by MST Devices in the Path.................................................................274
2.11.6 Broadcast Message Transactions ................................................................................................................275
2.11.7 Message Delivery........................................................................................................................................276
2.11.8 Error Handling ............................................................................................................................................279
2.11.9 Descriptions of Available Message Transaction Requests..........................................................................281
2.12 Audio-to-Video & Audio-to-Audio Synchronization .........................................................................297
2.12.1 Overview.....................................................................................................................................................297
2.12.2 DisplayPort AV Sync Data Block (AVSDB)..............................................................................................298
2.12.3 Delay Compensation ...................................................................................................................................298
2.13 Global Time Code and Audio Inter-channel Sync..............................................................................304
2.13.1 Global Time Code.......................................................................................................................................304
2.13.2 Application of GTC for Audio Inter-channel Synchronization...................................................................307
3 Physical Layer ...........................................................................................................................................309
3.1 Introduction.........................................................................................................................................309
3.1.1 PHY Functions.............................................................................................................................................309
3.1.2 Link Layer-PHY Interface Signals...............................................................................................................310
3.1.3 PHY-Media Interface Signals ......................................................................................................................311
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