In AN434, the reports list lists two I2C reports: I2C Read (0x7E) and I2C Write (0x7D). Can I use these HID reports to use the CP2114 as an I2C pass-through device from the host to the attached codec?
Yes. However, these two reports are only available on the CP2114-B02 devices. CP2114-B01 devices do not have this capability.