CCG6DF - HPD

[Ivan_Lee]

We use HOST SDK 3.5 for Alder platform .

As we know, the PCH communicate with CCG6DF  by I2C and CCG6DF reports type-c port connection mode status to PCH.
connection mode , Ex: USB3 , USB3 Flip , DP , DP Flip , DP + HPD...

The connection mode contains HPD status bits (I2C - Virtual HPD )

Customer don't want use "Virtual HPD",
They prefer to use GPIO to notify PCH about HPD status
How to modify FW to support "GPIO HPD"?

[Ivan_Lee]

I check FW, it doesn't call hpd_transmit_init function to initialize HPD_P0_PORT_PIN / HPD_P1_PORT_PIN pins

[Pranava_YN]

Hi Ivan!

The default project CYPD6228-96BZXI_notebook_dualapp_tbt present in Host SDK 3.5 is for the ICL platform. For Alder Lake (ADL) you have to disable ICL_ENABLE macro in config.h and define ADL_ENABLE.

This will enable section of code that calls hpd_transmit_init() function and corresponding other functions as well.

[Ivan_Lee]

Hi, Pranava,

After disabling  ICL_ENABLE macro, it has build error msg :

armcc.exe --cpu=Cortex-M0 --C99 --diag_style=gnu -I.\src\pd_hal -I.\src\app -I.\src\pd_common -I.\src\system -I.\src\scb -I.\src\hpiss -I.\src\app\alt_mode -I.\src\app\intel_tbt -I.\src\ucsi -I.\common -I.\src\crypto -I.\src\crypto\ecdsa -I.\src\app\retimer_master -I. -IGenerated_Source\PSoC4 --list --signed_chars -g -D DEBUG -Ospace --split_sections --diag_suppress 66,188,550,815,167 -D__MICROLIB -c src\system\ccg6df_rom.c -o .\CortexM0\ARM_MDK_Generic\Debug\ccg6df_rom.o
src\system\ccg6df_rom.c:141:21: Error: #20: identifier "EC_INT_Write" is undefined
.EC_INT_Write = EC_INT_Write,
^
The command 'armcc.exe' failed with exit code '1'.
--------------- Build Failed: 10/12/2022 16:07:35 ---------------

[Pranava_YN · Accepted solution]

Hi,

Sorry for the confusion. Please revert back the modifications made (Delete ADL_ENABLE and re enable ICL_ENABLE). I checked again and got to know that during the build process, the SDK project takes care of the platform and generates  different binaries for each platform. All you need to do is to modify the config files provided with the project. The binary generated will have corresponding configuration.

A snapshot of build folder is shown above, for ADL use _adl_ files. It has GPIO based HPD enabled by default.