AMD ACP: missing I2S support for AWINIC AW88298 Smart PA on Chuwi CoreBook X

[pacomont]

Summary

The Chuwi CoreBook X (AMD Ryzen 5 7430U, Barcelo-R) uses a hybrid stereo speaker design:

• Right speaker: Conexant SN6180 HDA codec — works
• Left speaker: AWINIC AW88298 Smart PA via I2S from AMD ACP — does not work

The AMD ACP (1022:15e2) does not create I2S platform devices for this machine because the kernel lacks an ACPI machine table entry for HID AWDZ8298.

Related issue with full hardware details: thesofproject/linux#5687

Key Facts

• ACP PCI: 03:00.5 [1022:15e2] (rev 01)
• snd_rn_pci_acp3x enables the device but does not bind — no I2S platform devices created
• AWINIC chip: AW88298 (PID 1852), I2C bus 0, addr 0x34
• ACPI HID: AWDZ8298, path \_SB_.I2CB.CHIP, status active (0x0F)
• GPIO: pin 121 (0x79) for RSTN, currently HIGH
• Chip responds to I2C, registers are writable, but SYSST shows NOCLKS — no I2S clock from ACP

ACPI DSDT snippet

Scope (_SB.I2CB)
{
    Device (CHIP)
    {
        Name (_HID, "AWDZ8298")
        Name (_CID, "AWDZ8298")
        // I2C: 0x34 + 0x35 at 400kHz on I2CB
        // GPIO: pin 0x79 (121)
        // _DSM UUID: 1cc539cd-5a26-4288-a572-25c5744ebf1b
        //   Arg2==0: {0x01, 0x34, 0x01, 0x35}
        //   Arg2==1: {0x02}
    }
}

What is needed

1. ACPI machine table entry in AMD ACP driver (snd-amd-acpi-mach) for HID AWDZ8298
2. ACP I2S platform device creation for this configuration
3. ASoC codec driver for AW88298 (out-of-tree driver exists: https://github.com/dianjixz/aw882xx)
4. SOF topology / firmware support if applicable

System Info

• Chuwi CoreBook X (Emdoor ODM, subsystem 0x2782:0x1221)
• AMD Ryzen 5 7430U
• Kernel 6.18.13-200.fc43.x86_64 (Fedora 43)
• Also broken on fresh Windows 11 (requires OEM driver)