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USB Developer Days 2016
VESA DisplayPort
Alternate Mode on USB Type-C
Technical Overview
Jim Choate
VESA Compliance Program Manager
Houston
September 27 – 28, 2016
September 27 – 28, 2016 USB Implementers Forum © 2016
USB Developer Days 2016
Agenda
•
Introduction
•
DisplayPort Technology Roadmap
•
DisplayPort Alternate Mode on USB-C Technical Overview
•
Compliance
•
Demo
•
Summary
USB Type-C
TM and USB-C
TM are trademarks of USB Implementers Forum
September 27 – 28, 2016 USB Implementers Forum © 2016 2
USB Developer Days 2016
About VESA
VESA is the Video Electronics Standards Association
Global industry alliance with more than 230 member
companies
Mission is to develop, promote and support an ecosystem of vendors and certified interoperable products for the electronics industry
Facilitates display related standards development, publication and compliance testing, as well as promotion and marketing
Develops Open standards, contribution is open to all companies at all stages of development
September 27 – 28, 2016 USB Implementers Forum © 2016 3
USB Developer Days 2016
Display Trends and DisplayPort Roadmap
2006 2007 2008
1080p
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
4K 30Hz 4K 60Hz
8K 60Hz
HDR
Televisions
Y ou a re he re
4K 60Hz
HDR
8K 120Hz
HDR
1080p 4K 60Hz 5K 60Hz
8K 60Hz
HDR
PC Monitors
4K 60Hz
HDR
8K 120Hz
HDR
1680x1050
Notebook PC
1080p
2880x1800
Quad HD
4K 60Hz 5K 60Hz
4K 60Hz
HDR
?
DP 1.0-1.1
Up to Quad HD
2.7 Gbit/sec
Link Rate per Lane
DP 1.2
Up to 4K 60Hz, 10 bit color
5.4 Gbit/sec
DP 1.4
Up to 8K
DP 1.3
Up to 5K
DP XX
Up to 8K
120Hz
8.1 Gbit/sec
10 Gbit/sec
?
September 27 – 28, 2016 USB Implementers Forum © 2016 5
USB Developer Days 2016
DisplayPort Specification Summary
§
The VESA DisplayPort Standard, Version 1.4, was released on March 1, 2016
§
Replaces DisplayPort Version 1.2a/DP1.3 for new designs
§
Backward compatible, offers new optional features
§
New Silicon supporting HBR3 is under deployment and certification testing has started
§
DisplayPort 1.4 New Features
§
Forward Error Correction
§
Adds DSC, Audio extensions, improved MST functionality, Adaptive Sync
§
30 bit color; 8K 4:4:4, 7680X4320 @60Hz – Single Cable
September 27 – 28, 2016 USB Implementers Forum © 2016 6
USB Developer Days 2016
DP 1.4 Link Rate Increase
DP Version
Introduction
Link Rate
Name
Bit rate Max Resolution Support
(24 bpp, 60Hz Refresh, 4:4:4 format)
Max Resolution Support
(24 bpp, 60Hz Refresh, 4:2:0 format)
DP 1.0
RBR
HBR
HBR2
1.62 Gbps
2.7 Gbps
5.4 Gbps
1920x1080
2560x1600
4K x 2K DP 1.2
DP 1.3/1.4
HBR3 8.1 Gbps 5K x 3K
Total useable data transfer rate for DP 1.4 = 25.92 Gbps
Not supported
Not supported
Not supported
8K x 4K
8.1 Gbps link rate, per lane x 0.8 to account for 8b/10b transport coding overhead x 4 maximum number of available lanes
25.92 Gbps total usable data transfer rate
September 27 – 28, 2016 USB Implementers Forum © 2016 7
USB Developer Days 2016
Optimization for Shared Interface Use
•
Numerous specification enhancements to simplify the use of DisplayPort as an ingredient in the following interface examples:
•
The USB-C connector, using the DisplayPort Alt Mode
•
VESA DockPort Standard
•
VESA Mobility DisplayPort Standard (MyDP)
•
VESA Embedded DisplayPort Standard (eDP)
•
ThunderBolt 3.0
•
Wireless interfaces
September 27 – 28, 2016 USB Implementers Forum © 2016 8
USB Developer Days 2016
DisplayPort 1.4 Continues to Support Other Features that are
Unique to DisplayPort
•
Multiple monitors using Multi-Stream
•
High-definition audio formats
•
Adaptive Sync
•
Protocol converters to VGA, DVI, or HDMI
•
Low voltage, AC coupled interface compatible with sub-micron process geometry, simplifying integration
•
Data scrambling and fixed link rates simplify EMI and RFI mitigation
September 27 – 28, 2016 USB Implementers Forum © 2016 9
USB Developer Days 2016
Progression of Display Experience with DisplayPort
DP 1.0/1.1 (4/2007) – HBR1
•
A setup driven by 6 Mini-DP connectors at 2560x1600@60Hz on single graphics card
DP 1.2 (12/2009) – HBR2
•
UHD – 4K
•
30 bit color; 3840x2160@60Hz
•
Tiled Display: 4Kx2K single cable
•
Tiled Display: 5Kx3K Dual Cable
•
AdaptiveSync
DP 1.3 (9/20014) – HBR3
•
HDR, PQ Gamma, BT 2020
•
HDCP 2.2, 420
•
Tiled Display: 8K 444 Dual Cable
•
5Kx3K@60 and 4k@120Hz Single Cable
•
Single cable for DP A/V, power and data using DP Alt Mode on USB-C
DP 1.4 (3/20016) – HBR3 & DSC
•
UHD – 8K
•
30b color; 8K 444 (7680x4320) @60Hz
– Single Cable
•
VR – 4K + 120Hz + USB3.1 + Pwr
•
Multi Display Docking with DP Alt
Mode on USB-C
•
Dynamic HDR Meta
September 27 – 28, 2016 USB Implementers Forum © 2016 10
USB Developer Days 2016
DisplayPort Alternate Mode on
USB-C Overview and
Certification
September 27 – 28, 2016 USB Implementers Forum © 2016 11
USB Developer Days 2016
VESA DisplayPort Alternate Mode on USB-C Summary
•
The VESA DisplayPort Alt Mode Standard, Version 1.0a , was released on
Aug 10, 2015
•
Enables the use of the USB-C interface for DisplayPort
•
DisplayPort Alternate Mode is a functional extension of the USB-C interface
•
Developed in liaison with the USB 3.0 Promoter Group
•
The DisplayPort Alternate Mode over USB-C Compliance Test
Specification draft is under General Member Review with expected release next quarter
September 27 – 28, 2016 USB Implementers Forum © 2016 12
USB Developer Days 2016
Example USB Type-C Configurations
Either end can serve as USB Host, USB-PD Power Consumer, and DisplayPort Video Source (these services are independent of each other
Device Charging
USB
Device Charging
USB 2.0 or 3.1 Data
Display Data
Device Supplying Power
USB 2.0 or 3.1 Data
Display Data
September 27 – 28, 2016
Dock
USB Implementers Forum © 2016 13
USB Developer Days 2016
USB-C with DP Alt Mode Ecosystem Deployment Underway
DP Alt Mode Products
Dell XPS 13/15
LG 27UD88 4K display
Apple MacBook HP Pro Tablet 608 G1
Many different adapters available
•
•
C to DP adapters, Multifunction docks
Google Chromebook Pixel
Type C protocol converters (HDMI, VGA, DVI) using DP Alt Mode
Microsoft Lumia 950 and 950XL
Smartphones
More are expected soon
§
Major PC continue to launch new products with DP Alt Mode over USB-C
§
Thunderbolt includes USB 3.1 + DP Alt Mode as standard compatibility modes
StarTech 4 in 1 Adapter
LG G5
September 27 – 28, 2016 USB Implementers Forum © 2016 14
USB Developer Days 2016
Wide Range of Cables/DP Alt Mode Adapters
Shipping Today
Standard USB-C to USB-C Cable
USB-C to DP
USB-C to VGA
USB-C to DVI
USB-C to HDMI
These adapters enable the use of the vast installed base of legacy displays for the increasing numbers of systems that support DisplayPort Alternate Mode over USB-C.
September 27 – 28, 2016 USB Implementers Forum © 2016 15
USB Developer Days 2016
USB-C Connector Functional Extension
DisplayPort Alternate Mode
USB Host
With DisplayPort Alternate
Mode Capability
DisplayPort or
USB 3.1 Data
USB Device (or Dock)
With DisplayPort Alternate Mode
Capability
USB Type-C
Connector
USB Type-C to Type-C Cable
Power Delivery or
USB Type-C
Connector
•
A passive Full Feature USB Type-C to Type-C cable can carry up to four
DisplayPort lanes
•
Same performance and features as a standard DisplayPort connection
•
Allows DisplayPort data rates to increase in the future, since the USB Type-C connector has very high data rate capability
•
DisplayPort can be combined with USB 3.1 operation over the same USB
Type-C cable
•
USB 2.0 and USB Power Delivery is available in all configurations
September 27 – 28, 2016 USB Implementers Forum © 2016 16
USB Developer Days 2016
USB Type-C Receptacle Pins
•
Below is a diagram of the pins defined for system or device receptacle
High Speed Data Path (TX for USB, or for DP Alt Mode)
USB 2.0
Interface
High Speed Data Path
(RX for USB, or TX for DP Alt Mode)
Cable Ground
Cable
Bus Power
For Sideband Use
(not used for USB)
DP Aux for Alt
Mode
Plug Configuration Detection
•
One becomes V
CONN
, for cable or adaptor power
•
CC is used for USB-PD communication
September 27 – 28, 2016 USB Implementers Forum © 2016 17
USB Developer Days 2016
DisplayPort and USB 3.1 over a Standard USB-C Cable
USB-C Device with
DisplayPort Source
Type-C
Connector
(such as phone, tablet, PC, set-top box, game console, or output of docking station or AV Receiver)
USB 3.1
USB 2.0
SSTX
SSRX
DisplayPort
DP Lane 0
DP Lane 1
AUX+, AUX-
CC, HPD
VBUS
GND
ID
Type-C
Connector
USB-C Device with
DisplayPort Sink
(such as monitor, TV, or input into docking station, or AV Receiver )
•
Uses a standard “Full Feature” USB-C to USB-C cable which is designed to include DisplayPort
•
The above configuration uses two high-speed lanes each for DisplayPort and USB 3.1
•
Ideal for docking stations, or for displays or TVs that include USB 3.0 functions
•
DisplayPort performance provided by two lanes
•
DP v1.2 (existing Source devices): Two 1080p displays, or one 4k@30Hz
•
DP v1.4 (HBR3 Source devices): 4K@60, or HDR 4K@60 using 4:2:0 and 12bpp
•
4 Lanes of DisplayPort available if only USB 2.0 implemented in Sink
•
Support for 4K@60, or two 2560x1600, or four 1080p
September 27 – 28, 2016 USB Implementers Forum © 2016 18
USB Developer Days 2016
Example USB-C PHY Port Configuration Switch for Systems with DisplayPort Source
•
Equalization and re-drivers for the SS USB and DisplayPort signals increase margins
•
Compensates for loss in PCB traces and switch, increases system design flexibly and compliance margin
•
Routes signals according to plug orientation and use of SS USB and/or
DP
USB Host System with DisplayPort Source
•
Similar switch needed at source side
U SB
Co n t r o l l e r
Displa yPort
So u r c e
USB TX
USB RX
DP TX
DP TX
DP TX
DP TX
EQ
EQ
EQ
EQ
EQ
PS8 7 4 0
EQ
EQ
USB TX / DP TX
USB RX / DP TX
USB TX / DP TX
USB RX / DP TX
SuperSpeed USB
With DP Alt Mode
De v i c e Co n t r o l
T h r o u g h Pi n Co n f i g o r I 2 C Sl a v e Po r t
September 27 – 28, 2016
A U X
I n t e r c e p t i o n
De v i c e
Co n t r o l
Co n t r o l
Re g i s t e r s
DP AUX
USB Implementers Forum © 2016 19
USB Developer Days 2016
Supported cable types
•
USB-C to USB-C
•
USB-C to DP
•
USB-C to Protocol converter
•
USB-C to Docking station or embedded hub solution
•
USB-C to DP cables must include logic to support USB PD and DP
DP Signaling
DP
USB-PD
HPD
PD Controller
•
Protocol converters must support some optional features in DP 1.3 specification
•
Protocol converters translate source DP signals to the respective protocol supported
DP Signaling
USB
PD
HDMI Signaling
USB-PD
Protocol Converter
September 27 – 28, 2016 USB Implementers Forum © 2016 20
USB Developer Days 2016
DisplayPort Over a USB Type-C to USB Type-C Full Feature
Passive Cable
SSTX1
SSRX1
DP Lane 2
DP Lane 3
Cable
DisplayPort
Source
USB
Type-C
Connector
SSTX2
SSRX2
DP Lane 1
DP Lane 0
USB 2.0
SBU1/2 AUX+, AUX-
USB
Type-C
Connector
DisplayPort
Sink
CC, HPD / V
CONN
ID
VBUS
GND
•
Utilizes optional DisplayPort Alt Mode capability of USB Type-C connector
•
DisplayPort can use all four high speed lanes to deliver full DisplayPort performance
•
The DisplayPort AUX Channel uses the SBU pins
•
The DisplayPort HPD / IRQ is transmitted over the CC pin using the USB-PC protocol
•
USB 2.0 and USB Power Delivery always available
September 27 – 28, 2016 USB Implementers Forum © 2016 21
USB Developer Days 2016
USB Type-C to DisplayPort Adapter Cable
Cable
USB
Type-C
Connector
SSTX1
SSRX1
SSTX2
SSRX2
SBU1
SBU2
CC, HPD
AUX+
AUX-
ID
V
CONN
DP Lane 0
DP Lane 1
DP Lane 2
DP Lane 3
HPD Signal
Conversion
HPD
DisplayPort
Connector
•
Uses DisplayPort Alt Mode capability of USB Type-C connector
•
Cable must be reversible, works in either direction; four lanes of DisplayPort
•
Supports legacy DisplayPort Source and Sink Devices
•
Detected by USB Type-C enabled device that supports DP Alt Mode
•
No support for USB (other than USB Billboard) or other alt modes
–
These features are not supported by legacy DisplayPort devices
September 27 – 28, 2016
Standard DP or
Mini DP
Connector
USB Implementers Forum © 2016 22
USB Developer Days 2016
USB Type-C to HDMI, DVI and VGA
Adapter Cables / Cable Adapters
Cable
DP Lane 0
DisplayPort
Source
USB
Type-C
Connector
DP Lane 1
DP Lane 2
DP Lane 3
CC
V
CONN
AUX+
AUX-
HPD
ID
DisplayPort
To
HDMI, DVI, or VGA
Converter
USB PD
Controller
•
Uses DisplayPort Alt Mode capability of USB Type-C connector
•
Adapter Cable: USB Type-C plug on one end, legacy plug on other end
•
Adapter: USB Type-C plug on one end, legacy receptacle on other end
•
USB Type-C will NOT support DisplayPort Dual Mode (DP++)
•
USB Type-C to HDMI Converters support up to HDMI 2.0 and CEC
Legacy
Connector or
Receptacle
HDMI,
DVI, or VGA
Display
Both styles are available
September 27 – 28, 2016 USB Implementers Forum © 2016 23
USB Developer Days 2016
Example Docking Configurations using the
USB Type-C DisplayPort Alternate Mode
Simple Docking Configuration
USB Type-C Enabled
USB Host and
DisplayPort Source
USB
Type-C
USB
Type-C
Docking Station
USB
Repeater
Legacy USB
DP
Repeater
Legacy DP
Power
More Complex Docking Configuration
USB Type-C Enabled
USB Host and
DisplayPort Source
USB
Type-C
USB
Type-C
Docking Station
USB Hub
DisplayPort
Branch
DP to HDMI
Converter
Legacy USB
Legacy DP
HDMI
Power
September 27 – 28, 2016 USB Implementers Forum © 2016 24
USB Developer Days 2016
DisplayPort Alternate Mode Compliance Test Plan
•
VESA is developing the DP Alternate Mode compliance test in coordination with the USB-IF
•
Compliance test specification (CTS) is under under general membership review
•
Draft 1.0 expected to release next quarter
•
The objective is to enable compliance testing for USB Type-C, and the DP
Alt Mode for USB Type-C, at the same ATCs enabling the use of a single test station
•
Certification of many DisplayPort Alternate Mode enabled products is in progress at GRL and Allion ATCs
September 27 – 28, 2016 USB Implementers Forum © 2016 25
USB Developer Days 2016
Certification Test Coverage
Test plan and CTS covers all features and supported pin assignments.
•
USB PD Compliance Testing
•
•
Demonstration of proper functionality/behavior for DP Alt Modes certification
•
Electrical testing of all supported modes with PHY test fixtures
•
USB PHY electricals
•
USB 3.1 Gen1 5G
•
USB 3.1 Gen2 10G (if supported)
•
USB 2.0 480Mb/s
•
DP PHY electricals (DP 1.2b CTS)
•
RBR
•
HBR
•
HBR2 (HBR3 compliance requirements under development)
•
Aux Channel
September 27 – 28, 2016 USB Implementers Forum © 2016
26
26
USB Developer Days 2016
Certification Test Coverage (continued)
•
USB 3.1 Interop testing (functional)
•
USB 3.1 Link testing
•
Full DP certification testing using reference Adapters
•
Interoperabilty testing
•
Interop testing with a required matrix of products and adapters that are available.
•
Testing with reference USB-C to DP adapters is required.
•
Testing with reference DP Alt Mode over USB-C reference sources and sinks is required.
•
Link layer testing
•
EDID testing
•
MST testing if supported
•
Certification testing of USB 3.1 functionality not duplicated if product vendor provides VESA USB-IF Compliance Test ID
September 27 – 28, 2016 USB Implementers Forum © 2016 27
USB Developer Days 2016
Cable & Adapter testing
•
Certification testing of cables/adapters
•
USB-C to USB-C cables certified via USB-IF
•
USB Type C to DP cable
•
Electrical testing
•
Interoperability testing
•
Link Layer testing
•
Protocol converters (all protocol converters are DP sinks)
•
Receiver testing
•
USB PD testing
•
Link Layer Sink tests
•
Interoperability tests
September 27 – 28, 2016 USB Implementers Forum © 2016
28
28
USB Developer Days 2016
VESA Synchronization with USB-IF Compliance Test
Program
•
Coordinate certification plans, test coverage and timing for early products
•
Avoid scheduling conflicts
•
Participate in USB-IF certification and interoperability events
•
VESA will continue to participate in USB-IOP events and workshops
September 27 – 28, 2016 USB Implementers Forum © 2016
29
29
USB Developer Days 2016
VESA PlugTest Events in 2016
•
PlugTests have significant value to member companies. Particularly as new
•
VESA planned to host three PlugTests in 2016. The third event this year is in
•
November Taiwan event introduced workshop pre-cert testing
•
Objectives of 2016 Plugtests
•
Demonstrate and improve interoperability
•
Particularly important for new product capabilities
•
Test DP 1.4 and DP Alt Mode over USB Type-C
•
Verify Test Equipment Correlation
•
Dates/Locations:
•
Done: March 23-26th 2015, Milpitas CA
•
Done: September 14th-17th 2015, Embassy Suites Burlingame CA
•
Planned: Taiwan December 12-16 th , Westin Taipei
September 27 – 28, 2016 USB Implementers Forum © 2016 30
USB Developer Days 2016
Logo Useage Guidlines
•
No change to existing DP product logo guidelines
•
For DP over USB-Type C products
•
DP certification includes subset of testing requirements of USB-IF
•
Requirement to use new fixtures and DP over USB Type-C adapters
•
Refer to VESA DisplayPort logo useage guidelines for further information
•
Refer to the USB-IF Trademark License Agreement for further information
•
VESA is working with the USB-IF to create additional logo guidelines as well as common product description terminology
September 27 – 28, 2016 USB Implementers Forum © 2016 31
USB Developer Days 2016
Compliance Test Issues
Common compliance testing problems encountered
•
DP Alt Mode PHY Compliance
•
OS specific toolset are often required to properly get into test modes
•
Some products/chipsets do not support Test Automated over Aux
•
This is being addressed in new methodology under developer, the Link
Training Test Automation Mode.
•
USB-PD testing issues
•
Specification has been changing
•
New tests added to draft CTS have uncovered implementation issues
•
DP Alt Mode CTS USB-PD Test 10.1.2 Status update Command Test failures.
The test fails if the Status field is invalid
•
A number of other issues have been identified at recent USB-IOP events and
VESA PlugTest events. Tests will be added to verify product compliance.
September 27 – 28, 2016 USB Implementers Forum © 2016 32
USB Developer Days 2016
Compliance Test Issues
•
1 or 2 lane configuration compatibility issues
•
Source and sink chipset issues uncovered during interoperability testing of
DP Alt Mode products using USB-C docks.
•
Issue occurs when Dock is configured in 2 lane mode to support 2 lanes of DP and 2
•
Sources fail if they don’t implement fallback rules in DP 1.4 specification
•
Sinks fail if they don’t support reduced lane operation or if they don’t lanes
•
Billboard implementations: many products have not updated to Billboard
•
Compliance tests are under development to address these issues
September 27 – 28, 2016 USB Implementers Forum © 2016 33
USB Developer Days 2016
Billboard Compliance Testing
September 27 – 28, 2016
•
Download
USB3CV from
USBIF developers page
•
X32 or X64
•
Install on system with xHCI
(no Alt Mode
Support)
•
Select
Billboard tests and run
USB Implementers Forum © 2016 34
USB Developer Days 2016
DP Alt Mode PHY Testing
Test Setup for DP PHY testing using DP Aux Test Automation
DP PHY test
DP TPAs
Connector:DP or mDP
AUX PHY test
DP cable
Aux Reference
Controller
AUX Automation
DP HBR2 PHY test
Connector:Type C
Keysight TPAs
AUX PHY test
USB-C to DP cable
Fixtures
Unigraf DPR-100
AUX Automation
Test Setup for DP PHY testing using Link Training Test Automation
September 27 – 28, 2016 USB Implementers Forum © 2016 35
USB Developer Days 2016
Summary of DP Alt Mode over USB-C supported features
Feature
Supports HDMI 1.4b displays
Supports 4K 30 Hz displays
No adapter required for connection from USB Type-C to standard HDMI TV
Supports HDMI 2.0 displays
Supports 4K 60 Hz displays
Supports High Dynamic Range
Supports multiple video streams
Connects to USB-C enabled displays that are shipping now (DisplayPort Alt Mode enabled)
Supports USB SuperSpeed concurrent with video display
Supports simple adapter for connection to existing
HDMI cables
Avoids rewiring of pre-installed HDMi cables
Supports HDR
Supports 4K 60 Hz full color (4:4:4)
Supports 4K 60Hz deep color
Supports multiple 4K videos
DisplayPort
Alt Mode
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Feature
Supports High Dynamic Range
Supports 4K high refresh rate (120Hz)
Supports 8K video (with HBR3 plus DSC)
Low latency interactive VR experience with 90+ 4K+ with DP + USB 3.0
Supports USB Type-C on TV
Runs on USB Type-C to USB Type-C cables
Connects to wide range of already deployed USB-C devices
Use Cases
Multi 4k display productivity with single cable docking
Low latency Interactive VR experience with dual
4k>90Hz + Power + USB 3.1 (HBR3+DSC)
Smooth low latency gaming with AdaptiveSync
8k HDR workstation productivity with DP + DSC
DisplayPort
Alt Mode
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
DisplayPort 1.4 along with DP Alt Mode over USB-C & DSC can do today what you want your products to do tomorrow.
September 27 – 28, 2016 USB Implementers Forum © 2016 36
USB Developer Days 2016
Summary
•
DP 1.4 introduced many new capabilities and products are under development and in the certification process for these new features
•
Many Certified USB-C devices with DP Alt Mode are shipping with many more in development
•
DP Alt Mode CTS is under General Member Review and will be published by VESA in Q4’2016.
•
DP Alt Mode device certification is available from certified ATCs since
2015, allowing use of DP logo
•
Final 2016 VESA PlugTest event is in Taiwan December 12-16 th
2016
September 27 – 28, 2016 USB Implementers Forum © 2016 38
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