DisplayPort
Future Proofing Display Connectivity

for VR and 8K HDR
Syed Athar Hussain
VESA Vice Chair
AMD Display Domain Fellow

GLOBAL INDUSTRY ALLIANCE WITH MORE THAN 200 INDUSTRY-LEADING MEMBER COMPANIES -VESA REPRESENTS THE DISPLAY ECOSYSTEMVESA has developed empowering display interface technologies
enabling innovative display solutions across a range of platforms
 DisplayPort Interface
 8.1 Gbps/lane link bandwidth Scalable lane count 1, 2, 4 lanes Multi-stream transport
 AdaptiveSync
 Display Stream Compression (DSC) Frame aligned dynamic meta transportation
 DisplayID Co-ordinated Video Timing (CVT)Progression of Display Experiences with DisplayPort

DP 1.4 (3/2016) – HBR3 & DSC
DP 1.3 (9/2014) – HBR3

DP 1.2 (12/2009) – HBR2

DP 1.0/1.1 (4/2007) – HBR1 • UHD – 4k•

A setup driven by 6 Mini-DP•
connectors at 2560x1600@60 •Hz on a single graphics card••

30 bit color; 3840x2160 @ 60 Hz
Tiled Display –4k x 2k MST single
cable
Tiled Display - 5k x 3k Dual Cable
AdaptiveSync•••••••

HDR, PQ gamma, BT 2020
HDCP 2.2, 420•
Tiled Display – 8k 444 Dual Cable•5kx3k@60 and 4k@120 Hz Single Cable •A single connector connectivity with DP
A/V, power and data via DP alt modeon USB-C

UHD – 8k30 bit color; 8k 444 (7680 x 4320)@ 60Hz – Single Cable
VR – 4k+ @120Hz+, USB 3.1
Multi Display Docking with USB-C
Dynamic HDR Meta

What is DisplayPort ? An Overview…
 High-speed packet based interface
Enables multiple independent streams on single cable, and allows DisplayPort streams to be tunneled overalternate transport layers such as Thunderbolt and Wigig Display Extension.

 Spread-spectrum clocking and pseudo random coding for RFI mitigation
 With DisplayPort, the following fixed rates can be selected
Main Link
Configuration

Raw Bit Rate (includes codingoverhead) - Gbps

Application Bandwidth
Throughput - Gbps

1 lane1.62, 2.7, 5.4, 8.1

1.296, 2.16, 4.32, 6.48

2 lanes

3.24, 5.4, 10.8, 16.2

2.592, 4.32, 8.64, 12.96

4 lanes

6.48, 10.8, 21.6, 32.4

5.184, 8.64, 17.28, 25.92

 Flexible pixel packing; Stream rate is decoupled from link rate Display Stream Compression enables a low-overhead, low-latency visually lossless compression
scheme that provide up to 3:1 compression
 Flexible lane configuration allows 1, 2, or 4 lanes to be enabled depending on A/V stream
requirements

DP alternate mode in USB type C connector; 2 lanes are used for A/V data and remaining 2 lanes to steer USB
3.1 trafficAdaptiveSync – enables low latency & power efficient transport ofvarying source content frame rate over DisplayPort interface
MSA

ActiveFrame NBEMSABSBE

ActiveFrame N+1

Extended Frame Period(i.e. 25ms)

ExtendedVariableBlank

 Frame rate varies with content type
 AdaptiveSync provides a flexible frame work totransport variable frame rate
 EDID & DisplayID provides sink refresh rate range
capability
 Source optimizes the frame transport for power efficienttransport and lower latency frame update Enables seamless video playback at different rates andpower savings for static screen.

Nominal Frame Period(i.e. 16.67ms)

NominalBlankBS Leading to lower latency frame
update and smoother gameplay experience

Regular Fixed
Refresh Rate Display
VSYNC ON Mode

Regular Fixed
Refresh Rate Display
VSYNC OFF Mode

AdaptiveSync
Refresh RateDisplay

Surface A

Surface A

Surface A

Partial Surface ATime Gaming surface render timevaries with scene complexity
 With traditional fixed refresh
rate display, new frame isdelayed causing added
latency and stutter or tearing
 With AdaptiveSync, frame
period is seamlessly extended
to accommodate longer
rendering time.

Surface B Render TimeLower latency gaming experience with AdaptiveSync

Present Surface B
Surface A

Partial Surface B
Surface B

With regular display
frame is either
repeated and newframe is delayedcausing stutter orframe tearing iscaused

Surface B

Surface B

Blank period is extended
enabling low latency
update and no tearing

Frame aligned Dynamic Meta Transportation
MS A
VSC Ext (N)VSC Ext (N)VSC Ext(N)VSC Ext (N)Shall be greater than sink setup time requirement

BSActive
Frame NBE

SDR sRGB

SDR sRGB
HDR sRGB+

SDR sRGBSDR BT709
HDR BT2020
More VSC Ext SDP
chained packet to follow

No more VSC Ext SDP
chained packet to follow

 Source content may seamless switch between SDR and HDR
 DisplayPort Video Stream Configuration Extension (VSC Ext) data packet provides aflexible chaining framework to transport 2k+ byte of dynamic meta aligned withthe frame DisplayID would provide sink luminance and gamut capability for efficient tone
mapping based on capability of source and sinkUSB-C single cable connectivity with DisplayPort A/V, Power Delivery & DATAClutter free single cable connectivity using USB Type-C with DisplayPort AlternateMode Provides backward compatibility with legacy interfaces via convertors (DP to VGA, DP to DVI/HDMI) Power the PC, Tablet, Smart Phone or VR headset
 Accommodate touch, ambient, proximity, head/eye tracking sensors with USB 3.1 data along with 2 laneof DisplayPort Multi-display PC docking with DisplayPort Multi-Stream Transport
 2 lane at HBR3 can support 2 x 2560x1440@60Hz using CVT Reduced Blank 1 2 lane at HBR3 with DSC can support 3 x 3840x2160@60Hz using CVT Reduced Blank 2

 2 lane at HBR3 with DSC can support 30bpp 3840x2160@120Hz+ for VR application with USB 3.1 data

8k x 4k 444 Plug & Play experience with DP 1.3 dual cable Automatically configures multiple stream orcable displays without manual user intervention
 DisplayID “Tiled Display Topology Data Block”
describes additional display capabilities:
 Identifies the display as a Tiled Display
 Associates each individual stream with a particular tile
 Describes the tiled topology
 Describes location of each individual tile within thetopology

DisplayPort 1

DisplayPort 2+

8k x 4k 444 Scalable resolution support with Tiled Display configuration
Coordinated Video Timing optimizes the blank timing overhead by reducing the blankDisplay Stream Compression enables single cable 8k x 4k connectivity
TIMING

TILED

TIMING DEFINITION

INTERFACEPIXEL RATE

3840 x 2160 60 Hz IT,
3840 x 2160 60 Hz TV

NoDP 1.2a

VESA CVT RB 1
CEA

533.250 MHz
594.000 MHz

5120 x 2880 30 Hz IT

No

DP 1.2a

VESA CVT RB1

462.500 MHz

5k x 3k - Half frame 2560 x 2880 60 Hz IT

Yes (2x1)

2 x DP 1.2a

VESA CVT RB1

483.250 MHz

8k x 4k - Half frame 3840 x 4320 30 Hz IT

Yes (2x1)

2 x DP 1.2a

VESA CVT RB 2

515.205 MHz

5120 x 2880 60 Hz IT

NoDP 1.3

VESA CVT RB 2

924.144 MHz

7680 x 4320 30 Hz IT

NoDP 1.3

VESA CVT RB 2

1019.896 MHz

Yes (2x1)

2 x DP 1.3

VESA CVT RB 2

1044.993 MHzNo

DP 1.4 (DSC)

VESA CVT RB 2
CEA

2068.660 MHz
2376.000 MHz

8k x 4k - Half frame 3840 x 4320 60 Hz IT

7680 x 4320 60 Hz IT
7680 x 4320 60 Hz CEASummary of DisplayPort Advantages:

 DisplayPort offers a high performance interface with a flexible
architecture DisplayPort includes key technologies to enable high resolution, 8k HDRdisplays and high frame rate VR displays
Key DisplayPort Technologies:
 Display Stream Compression (DSC) Technology for bandwidth constrained links
 8kx4k@60 deep color over a single cable 4kx2k@120Hz deep color + USB 3.1 data using USB Type C with DisplayPort alternatemode

Tiled Display operation for high resolution + high refresh rate display solutions
AdaptiveSync for optimum utilization of content frame rendering
Scalable HDR support using DisplayID and Frame-aligned dynamic Meta
Transportation