Linux 6.5 Adds Initial Support for USB4 v2 Protocol
Linux 6.5 Adds Initial Support for USB4 v2 Protocol
Linux 6.5 Adds Initial Support for USB4 v2 Protocol.
The latest kernel patch shows that Intel is providing initial support for USB4 v2 in the Linux 6.5 kernel and enabling it on its new Intel Barlow Ridge discrete controller.
Last year, the USB4 v2.0 specification was released as the next-generation version of the USB4 standard .
USB4 v2 supports a transfer rate of 80 Gbps over a USB Type-C cable.
The USB4 2.0 standard is backward compatible with the first generation of USB4, as well as the older USB 3.2, USB 2.0, and Thunderbolt 3.
And the hardware does not need to be updated, and the performance of USB4 2.0 can be realized by using the existing USB4 cable.
Initial support includes 80G symmetric link support, bits required to boot the router in v2 mode, adaptive TMU handling, PCIe extended encapsulation, DisplayPort 2.x tunneling support, and CL2 low power link state handling.
120G and 80G link support and other changes coming soon.
The patch doesn’t say much about Barlow Ridge, which appears to be Intel’s upcoming dedicated USB v2 controller.
USB4 v2 support for Linux has been sent as part of the Linux 6.5 USB PR , which also adds a new Qualcomm PMIC Type-C driver, NVIDIA Tegra streaming protocol support, CDNS2 gadget driver, and many other updates.
