According to news on July 4, last September, the USB Promoter Group announced the USB4 Version 2.0 standard, which can achieve transmission speeds of up to 80 Gbps (10GB/s) using USB-C data cables and can handle 120 Gbps in one direction. data, while processing 40 Gbps of data in the other direction.
Intel has now provided initial support for USB4 v2 in the Linux 6.5 kernel, with initial enablement on its new Intel Barlow Ridge controllers.
Intel engineer Mika Westerberg participated in the launch of USB4 v2 along with many Linux engineers and enabled their Barlow Ridge controller.
Initial support includes 80G symmetric link support, number of bits required to boot the router in v2 mode, adaptive TMU handling, PCIe extended encapsulation, DisplayPort 2.x tunnel support, and CL2 low-power link state handling for 120G and 80G links Road support and other changes are coming soon.
Apart from these patches, not much information has been found about Intel Barlow Ridge, which appears to be Intel's upcoming USB v2 dedicated controller.
It is reported that USB4 v2 support for Linux is part of the USB pull request for Linux 6.5, which also adds a new Qualcomm PMIC Type-C driver, NVIDIA Tegra streaming protocol support, CDNS2 device driver, and many other updates.
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