TUSB422: After PD-negotiation Windows OS does not load any Driver

Hi,

let me explain you our current board architecture.

We have designed a daughter board using TI components mainly: USB-C (receptacle connector) + TUSB422 + TUSB1064.

We are using the same code you provide in the TUSB422 webpage.

We are able to get the USB 2 and USB 3 interface.

We have tested the Display Port only and we was able to get image on a monitor with a warning on the OS side (no driver loaded).

When we combine both features (USB and PD) we send the following configurations, but the OS shows the attached warning message and does not allow Alternate Mode to work properly.

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TUSB422 configuration:

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#define PORT0  0
#define PDO1   0
#define PDO2   1

#define USB_VID 0x0451
#define USB_PID 0x0422
#define USB_BCD_DEVICE 0x0
#define USB_CERT_STAT_VDO USB_VID

const tcpc_config_t typec_config[NUM_TCPC_DEVICES] =
{
    [PORT0].intf = SMBUS_MASTER0,
    [PORT0].slave_addr = (TUSB422_SLAVE_ADDR_NC),
    [PORT0].flags = 0,
    [PORT0].role = ROLE_SNK,
    [PORT0].rp_val = RP_HIGH_CURRENT,
};

const usb_pd_port_config_t pd_config[NUM_TCPC_DEVICES] =
{
    [PORT0].usb_comm_capable = true,
    [PORT0].no_usb_suspend = true,
    [PORT0].usb_suspend_supported = false,
    [PORT0].externally_powered = false,
    [PORT0].dual_role_data = false,
    [PORT0].unchunked_msg_support = false, /* Always false for TUSB422 */

    [PORT0].num_src_pdos = 0,

    [PORT0].num_snk_pdos = 1,
    [PORT0].snk_caps[PDO1].SupplyType = SUPPLY_TYPE_FIXED,
    [PORT0].snk_caps[PDO1].MinV = PDO_VOLT(5000),
    [PORT0].snk_caps[PDO1].MaxV = 0, /* N/A */
    [PORT0].snk_caps[PDO1].MaxOperatingCurrent = PDO_CURR(3000),
    [PORT0].snk_caps[PDO1].MinOperatingCurrent = PDO_CURR(2500),
    [PORT0].snk_caps[PDO1].OperationalCurrent = PDO_CURR(3000),
    [PORT0].snk_caps[PDO1].MaxOperatingPower = 0, /* N/A */
    [PORT0].snk_caps[PDO1].MinOperatingPower = 0, /* N/A */
    [PORT0].snk_caps[PDO1].OperationalPower = 0,  /* N/A */

    [PORT0].higher_capability = false,
    [PORT0].giveback_flag = false,
    [PORT0].no_usb_suspend = true,
    [PORT0].fast_role_swap_support = FR_SWAP_NOT_SUPPORTED,
    [PORT0].pdo_priority = PRIORITY_VOLTAGE,

    [PORT0].auto_accept_swap_to_dfp = false,
    [PORT0].auto_accept_swap_to_ufp = false,
    [PORT0].auto_accept_swap_to_source = false,
    [PORT0].auto_accept_swap_to_sink = false,
    [PORT0].auto_accept_vconn_swap = false,

    [PORT0].multi_function_preferred = true,
    [PORT0].ufp_alt_mode_entry_timeout_enable = false,
    [PORT0].id_header_vdo = (0xEC000000 + USB_VID),
    [PORT0].cert_stat_vdo = USB_CERT_STAT_VDO,
    [PORT0].product_vdo = ((uint32_t)USB_PID << 16) | USB_BCD_DEVICE,

    [PORT0].num_product_type_vdos = 1,
    [PORT0].product_type_vdos[0] = 0x000A,
    [PORT0].product_type_vdos[1] = 0,
    [PORT0].product_type_vdos[2] = 0,
    [PORT0].num_svids = 2,
    [PORT0].svids[0] = 0xFF01,
    [PORT0].svids[1] = USB_VID,
    [PORT0].svids[2] = 0,

    [PORT0].modes[0] = 0x080045,
    [PORT0].modes[1] = 0x0,
    [PORT0].modes[2] = 0,
};

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TUSB1064 configuration:

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Address, value

0x0a, 0x13
0x10, 0x00 (different equalization values have been tested too)
0x11, 0x00 (different equalization values have been tested too)
0x13, 0x00
0x20, 0x66
0x21, 0x08
0x22, 0x04

Do you have any suggestion or any tested configuration for Alternate Mode?

Best regards

Fabrizio