director, technical specifications -qualcomm canada inc ... · display with multi-touch module i2 c...

James GoelDirector, Technical Specifications - Qualcomm Canada Inc.

Introduction and Overview of the Forthcoming MIPI Touch Specifications

©2017MIPIAlliance,Inc.

InformationONLY- Pleaserefertofulltechnicalstandard– Nottobeusedinastandard.ThisisnotaSpecificationscontribution.

Agenda• TouchArchitecturesandTopology• Stack-upofRelatedMIPITouchSpecifications• TouchCommandLayerModel• OverviewofMIPITouchCommandSet(MIPITCSSM)• TouchReportDataStructure

– Micro-Frames

• Detailedreviewofimportanttouchcommands

2



CurrentIndustryTouchStatus• Currentstatus– non-standardtouchcommandsets• Non-standardlink-layerprotocols

– SPI/I2C• Notoptimized

– Low-powermobileperformance– Low-costpin-countinterfaces

• Moretouchbandwidthrequired• Improvedtouchlatencyrequired

3



NewMIPITouchStandard• MIPITCSislink-layerandphysical-layeragnostic• Simplifiedstandardcommands• MIPITouchAdaptationLayerforI3C(MIPIALI3CSM)

– WorksseamlesslywithMIPISpecificationforI3C(MIPII3CSM)– FullyUtilizesMIPII3CIn-Band-Interrupts

• Low-latency(Linktomotivationalexample)• High-Bandwidth

– Widetouchsystemtopologysupported

4



BuildingonMIPISpecifications

5

TouchCommandsandRegisters

MapsTouchCommandstoHCIandMIPII3CLink-LayerProtocol

HostCommandI/FforMIPII3C

MIPII3CBusInterfaceSpecification

Applications andOS Upper Layers

MIPI Touch Command Set(Planned for 2017)

MIPI Touch AdaptationLayer for I3C

Planned for 2017

I3C Host Controller Interface(I3C HCI – Planned for 2017)

I3C(Improved Inter Integrated Circuit)

(Available Now)

All MIPI Specifications for MIPI Touch over I3C Implementation



MixedTopology

6

ApplicationProcessor

I3CHostController(HCI)

I3CHostBus

I3CHost

ProprietaryCommand MIPIStandardTouchCommandDeviceDriver

DisplaywithMulti-TouchModule

I2CDeviceController

I2CSlaveBusDevice0

Front-MainDisplaywithTouchSensorOverlay

I2CDeviceController

I2CSlaveBusDevice1

MIPIStandardTouchCommands

Implementation

VendorProprietaryAFE/TC

implementation

TouchIC0


Implementation


implementation

TouchIC1

BackDisplayw/Touch


Implementation


implementation

TouchIC2

I3CDeviceController

I3CSlaveBusDevice2

I2CDeviceController

I2CSlaveBusDevicen

I2CEEPROMorotherI2CSensor



Type1– StorageonHostTouchArchitecture

7

TouchSlaveDevice

TouchSlaveDevice

Processor


BusDeviceI/F

Firmware ConfigurationData

TouchReport

LocalMemory

TouchHost

Processor

BusDeviceI/F

BusPhysicalI/F

StorageMemory

ConfigurationDataFirmware

MIPITouchRegisters

MIPITouchCommands



Type2- StorageonSlaveTouchProcessorArchitecture

8

TouchSlaveDevice

TouchSlaveDevice

Processor


BusDeviceI/F

Firmware ConfigurationData

TouchReport

LocalMemory

TouchHost

Processor

BusDeviceI/F

BusPhysicalI/F

StorageMemory

ConfigurationDataFirmware

MIPITouchCommands

MIPITouchRegisters



MIPITouchCommandLayerModel

9



MIPITouchHostCommands

10

CommandName HexCode

CommandPayload BriefDescription RequiresCommandDone

mtcs_get_touch_report 8’h40 ByteCommandCode Requesttouchslavedevicetoreturnasingletouchreport.

No

mtcs_write_firmware 8’h41 Maximumwritelengthofhost

Transfersfirmwarefromthehosttothedevice.

Yes

mtcs_write_configuration_data 8’h42 Maximumwritelengthofhost

Transferstouchconfigurationdatafromhosttodevice.

Yes

mtcs_self_test 8’h43 ByteCommandCode Activatesdeviceself-test. Yesmtcs_soft_reset 8’h44 ByteCommandCode Activatesdevicesoftreset. No



MIPITouchHostCommands

11

Register Name Offset Description Accessmtcs_get_interrupt_type 00h Returnsinterrupttype ROmtcs_set_get_configuration 04h SetorGetTouchslavedevice

ConfigurationReadmodifywrite

mtcs_get_capabilities_information 08h Getthecapabilitiesofthetouchslavedevice

RO

mtcs_get_current_touch_report_type 0Ch Getthetypeofthelatestreturnedtouchreport

RO

mtcs_get_micro_frame_size 0Dh Getmanufacturerdeviceinformation RO

mtcs_get_manufacturer_information 12h Getmanufacturerdeviceinformation RO

mtcs_get_device_version_information 16h Getmanufacturerdevicehardwareandfirmwarerevisioninformation

RO

mtcs_get_command_set_version_information 1Ah GetMIPIcommandsetrevision RO



MIPIMicro-frameTouchReportStructure

12

TouchFrameReport

uFrame0 uFrame1 uFrame2 uFrameN-2

uFrameN-1

TotalMbytes

mbytes mbytes mbytes mbytes m’bytes

Totalmx(N-1)+m’byte=Mbyte

EH

EH

EH EnhancedHeader:2bytes

(noted:m’shallbeequaltoorsmallerthanm)



MIPIBasicTouchReportStructureEnhancedHeader

13

Bit

Byte

7 6 5 4 3 2 1 0

0 ReservedTouchdatareporttype:0=RAW_MANUFACTURER_REPORT1=LINUX_ANDROID_REPORT2=HID_REPORT3=HID_DESCRIPTOR4=HID_REPORT_DESCRIPTOR5=HID_PHYSICAL_DESCRIPTOR6..127=RESERVED

1• transaction_id:Monotoniccounterincrementingwitheachreport.Rolls-overto0after2^8-1.[7:0]

2..N• RestoftouchreportuptoNbytes



PORInitialization

14

Touch Slave Device Power-On Reset

Load and Initialize Firmware

Load and Initialize Configuration Data

Touch Slave DeviceSet mtcs_get_interrupt_type[ operational_status ]

to READY_FOR_OPERATION

Touch Slave Device Ready for Touch Sensing

Touch Slave DeviceUpdate FW Version Registers

mtcs_get_device_version_information

Touch Slave DeviceInitialize Registers

mtcs_get_manufacturer_informationmtcs_get_device_version_information

mtcs_get_command_set_version_information



15

MIPII3CCapabilityDeviceProfile

LegacyI2CProfile I3CSDRProfile I3CDDRProfile I3CTernaryProfile

Co-existswithotherLegacyI2CDevices

Required Required Optional Notallowed

I3CSingleDataRatea Required Required Required RequiredI3CDoubleDataRate N/A Notallowed Required OptionalHDR-TernarySymbolLegacy N/A Notallowed Notallowed NotallowedHDR-TernarySymbolforaPureBus

N/A Notallowed Notallowed Required

DynamicAddress(I3CSection5.1.4)

N/A NoProvisionalIDRequired

NoProvisionalIDRequired

NoProvisionalIDRequired

Hot-Join(I3CSection5.1.5)

N/A Limitedd Limitedd Limitedd

In-BandInterruptb(I3CSection5.1.6)

N/A Required Required Required

SecondaryMaster(I3CSection5.1.7)

Notallowed Notallowed Notallowed Notallowed

ApproximateBandwidth 1Mb/s 12Mb/s 25Mb/s 39Mb/sRequiredCCC Noc GETMWL

GETMRL

GETMWL

GETMRL

GETMWL

GETMRL

DCRHumanmachineinterfacefunction(see4.6)

No Required Required Required

MIPITouchAdaptationLayerforI3C(MIPIALI3C)



16

LegacyI2CInterrupts



17

MIPII3CStandard

*MIPISpecificationforMIPII3C– Section5.1.6.2MIPII3CSlaveInterruptRequest



18

MIPITouchAdaptationLayerforMIPII3C(ALI3C)

MIPITouchAdaptationLayerforMIPII3C– 4.4.1.2In-BandInterruptMandatoryDataByte



19

MIPII3CHostControllerInterface– DraftSpecification

MIPII3CHostControllerInterface– Section6.11Auto-Command



MIPII3CIBI- MandatoryDataByte(MDB)

20

Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

0:Normal1:TimingControl

0:Normal1:Auto-Command

InterruptType,definedbyCommandSpecification

(Unusedbitsdefaultto0)



SummaryandKeyTakeAwayPoints• MIPITouch=4xMIPISpecifications

– MIPITouchCommandSet– MIPIAdaptationLayerMIPII3C,– MIPIHCIforMIPII3C– MIPII3C

• ImprovedTouchPerformance– SimplifiesSoftwareandHardwaredesign– Improvedlatency– HighestThroughput– CompatibilitywithMIPISpecificationseco-system

21



BackgroundSection



TraditionalI2CTransaction

23

Device Driver IO Driver Device

Interrupt

OS

Request Data

Read Request

Data Response

Data ResponseEvent: Data

Interrupt to OS

RequestInterrupt Type

Get Interrupt Type

Read Request

Interrupt Type

Interrupt toDevice Driver

Return



MIPITouchMIPII3CSDRandHDRTransactions

24

Return



25

Return



26



27

Name:mtcs_get_interrupt_typeCommandDescription:Returnsinterrupttype

Access:ReadOnlyDefaultValue:00h

Offset:00hBit FieldName BriefDescription4:0 interrupt_type[4:0] 5’d0:NO_INTERRUPT_PENDING

5’d1:REPORT_DATA_AVAILABLE5’d2:COMMAND_DONE5’d3:ERROR_OCCURRED5’d4:REPORT_DATA_AVAILABLE_END_OF_FRAME5’D5-5’D15:RESERVED5’D16-5’D31:MANUFACTURER_DEFINED

7:5 Reserved

Offset:01h0 operational_status 1’b0:NOT_READY_FOR_OPERATION

1’b1:READY_FOR_OPERATION1 configuration_status 1’b0:

CONFIGURATION_DATA_WRITE_NO_REQUEST1’b1:CONFIGURATION_DATA_WRITE_REQUEST

2 fatality_status 1’b0:NON_FATAL_ERROR

1’b1:FATAL_ERROR3 invalid_firmware_err

or1’b0:VALID_FIRMWARE

1’b1:INVALID_FIRMWARE_ERROR4 invalid_configuration

_data_error1’b0:VALID_CONFIGURATION_DATA

1’b1:INVALID_CONFIGURATION_DATA_ERROR

5 self_test_failed_error

1’b0:SELF_TEST_PASSED

1’b1:SELF_TEST_FAILED_ERROR6:7 Reserved

MIPIInterruptTypeHandlingRegister

director, technical specifications -qualcomm canada inc ... · display with multi-touch module i2 c...

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