USB-C Charging on the PBP?

[wrzomar]

Is there a simple way to debug USB-C PD on the Pinebook Pro?

Simple.  Doubt that...

It uses a FUSB302 to control the USB PD bus.  There is a datasheet for it and it can be accessed over I2C.  So you could see what is going on if you can read a datasheet and use i2cset and i2cget to inspect the device.  You can also look around in /sys/bus/i2c/devices/4-0022/typec

Simple enough, thanks. I've written a simple C++ program to read some text files from the location, you've mentioned, to add to my already bloated conkyrc to conveniently monitor what's going on with USB-C.

Code:

#include <iostream>
#include <fstream>
#include <sstream>
#include <iomanip>
#include <string>

using namespace std;

const string MASTER_PATH = "/sys/bus/i2c/devices/4-0022/typec/port0/";
const string DATA_ROLE_F = "data_role";
const string ORIENTATION_F = "orientation";
const string PORT_TYPE_F = "port_type";
const string POWER_OPERATION_MODE_F = "power_operation_mode";
const string POWER_ROLE_F = "power_role";
const string PREFERRED_ROLE_F = "preferred_role";
const string SUPPORTED_ACCESSORY_MODES_F = "supported_accessory_modes";
const string UEVENT_F = "uevent";
const string USB_POWER_DELIVERY_REVISION_F = "usb_power_delivery_revision";
const string USB_TYPEC_REVISION_F = "usb_typec_revision";
const string VCONN_SOURCE_F = "vconn_source";

constexpr int FILENAMES_SIZE = 4;
const string FILENAMES[FILENAMES_SIZE] = {ORIENTATION_F, DATA_ROLE_F, POWER_ROLE_F, POWER_OPERATION_MODE_F};
const string SHORTCUTS[FILENAMES_SIZE] = {"O", "DR", "PR", "POM"};

bool printFromFile(const int index);

int main()
{
    for(int i = 0; i < FILENAMES_SIZE; i++)
    {
        bool result = printFromFile(i);
        if(i < FILENAMES_SIZE - 1){
            if(i == 2 || i == 3 || i == 6)
                cout << endl;
        }
        if(!result)
            break;
    }
    cout << endl;
    return 0;
}

bool printFromFile(const int index)
{
    cout << SHORTCUTS[index] << ":";
    ifstream file;
    file.open(MASTER_PATH + FILENAMES[index]);
    if(!file){
        cout << "!file ";
    }
    else{
        stringstream stringStream;
        stringStream << file.rdbuf();
        file.close();
        string contents = stringStream.str();
        if(!contents.empty() && contents[contents.length() - 1] == '\n'){
            contents.erase(contents.length() - 1);
        }
        int openBracket = contents.find('[');
        int closeBracket = contents.find(']');
        if(openBracket != string::npos && closeBracket != string::npos && openBracket < closeBracket){
            string strbetween = contents.substr(openBracket+1, closeBracket-openBracket-1);
            contents = strbetween;
        }
        cout << contents << " ";
        if(index == 0 && contents == "unknown")
            return(false);
        else
            return(true);
    }
}

It's just reading some text file: orientation, data_role, power_role and power_operation_mode. If orientation contains 'unknown', the code ignores the rest, because it is outdated anyway.
For a few days everything worked fine and I didn't have to reboot, but today I had to reboot twice. When it's charging using USB 3.0 but other USB-C functions aren't working (including charging using USB-C port on the powebank with Power Delivery), the 'orientation' file contains 'unknown'. If everything is fine, the 'orientation' file contains 'unknown' only when unplugged and 'normal' or 'reverse' when plugged. I didn't read the datasheet yet. I didn't check if FUSB302 is working at all when this happens.