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Using DPR-120 DP Reference Sink
with a MST Capable PC
Background
DPR-120 is a HBR2 and Multi streaming (MST)
capable DP Reference Sink and Branch device
When testing DP Source ...
DPR-120

The above image explains the principle of DPR-120

DPR-120 in SST and MST Mode
Stream Forwarding in SST Mode

When the MST Capable check box is de-selected in the GUI, DPR-120
is seen as a single Local...
Stream Forwarding in MST Mode

When the MST Capable check box is selected in the GUI, DPR-120 is seen as
a Multi-stream ca...
When Connecting to a PC
DPR-120 and the sinks connected to its DP Out port
are seen as PC monitors
The PC sends a stream f...
Example Set-up
PC with MST
capable DP GPU
Source
Non-DP monitor
DPR-120 Reference
Sink
DPR-100 SST
Reference Sink

DPR-120...
Initial Setup
The PC has only one monitor

No link, MST disabled

DPR-120 in SST and MST Mode
Connect DPR-120 as Monitor
DPR-120 is the second monitor

SST mode, links up, video enabled

DPR-120 in SST and MST Mode
Connect DPR-100 to DP Out
DPR-100 is the third monitor

MST mode, links up, two streams
enabled

DPR-120 in SST and MST Mo...
Adjust DPR-100 Video Mode
Adjust video mode in the Screen
Resolutions dialogue

Stream Status reflects the altered
video m...
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Testing Multistream DisplayPort GPUs with Unigraf DPR-120

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Multi streaming is a new featyre in Displayport. Users are not familiar with it. This presentation tries to provide help for the users of Unigraf DPR-120 DP Reference Sink on how to use it to test DP Source devices that are PC GPUs.

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Testing Multistream DisplayPort GPUs with Unigraf DPR-120

  1. 1. Using DPR-120 DP Reference Sink with a MST Capable PC
  2. 2. Background DPR-120 is a HBR2 and Multi streaming (MST) capable DP Reference Sink and Branch device When testing DP Source DUTs, DPR-120 Debug and Test Controller GUI is used to monitor the behavior of the DUT The streams and the content in the streams will be totally controlled by the source DUT This presentation will explain a MST test environment DPR-120 in SST and MST Mode
  3. 3. DPR-120 The above image explains the principle of DPR-120 DPR-120 in SST and MST Mode
  4. 4. Stream Forwarding in SST Mode When the MST Capable check box is de-selected in the GUI, DPR-120 is seen as a single Local Sink. The local EDID and DPCD registers define its capabilities for the upstream source. The received stream for the Local sink is copied to DP Out port and also is the Monitored Stream DPR-120 in SST and MST Mode
  5. 5. Stream Forwarding in MST Mode When the MST Capable check box is selected in the GUI, DPR-120 is seen as a Multi-stream capable DP Sink. The received streams are forwarded according to the intent of the Upstream Source. In the normal case one of the streams is for the DPR-120 Local Sink but this is not necessary the case. All four possible streams can be forwarded to downstream sinks as well. DPR-120 in SST and MST Mode
  6. 6. When Connecting to a PC DPR-120 and the sinks connected to its DP Out port are seen as PC monitors The PC sends a stream for each enabled monitor The user defines the video modes used The user defines which monitors are enabled In DPR-120 DTC GUI the user can monitor the details of each stream that the PC sends DPR-120 in SST and MST Mode
  7. 7. Example Set-up PC with MST capable DP GPU Source Non-DP monitor DPR-120 Reference Sink DPR-100 SST Reference Sink DPR-120 in SST and MST Mode
  8. 8. Initial Setup The PC has only one monitor No link, MST disabled DPR-120 in SST and MST Mode
  9. 9. Connect DPR-120 as Monitor DPR-120 is the second monitor SST mode, links up, video enabled DPR-120 in SST and MST Mode
  10. 10. Connect DPR-100 to DP Out DPR-100 is the third monitor MST mode, links up, two streams enabled DPR-120 in SST and MST Mode
  11. 11. Adjust DPR-100 Video Mode Adjust video mode in the Screen Resolutions dialogue Stream Status reflects the altered video mode DPR-120 in SST and MST Mode

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