The Intel Arc A-Series graphics (DG2) remains in a bit of an awkward state on Linux due to the transition period moving from the i915 kernel driver to more modern and feature capable Xe kernel driver. It's only post-Alchemist where the Intel Xe driver is officially supported and used by default while those opting for the Xe driver with the A-Series can often enjoy better performance and functionality. Except one of the caveats in using the Xe driver on Alchemist GPUs has been the lack of proper media acceleration support.

A long-standing limitation of opting to use the Xe open-source driver on Intel Arc A-Series cards has been [1]no HuC media support that is necessary for GPU acceleration with codecs like H.265/HEVC. HuC on Alchemist works on the i915 kernel driver but hasn't until now been wired up for Alchemist/DG2 on Xe. That in turn has blocked some users from [2]switching to the Xe driver for better performance for Linux gamers and enthusiasts.

Today though a merge request was opened that has laid out the HuC micro-controller support for DG2/Alchemist with the Xe driver. Open-source developer Daniil Seliverstov worked out the DG2-specific GSC/MEI handling for the Xe driver with:

"- add DG2 MEI GSC interface support

- add HuC firmware parsing for GSC BPDT/CPD layout

- improve HuC loading and authentication handling

- add GSC register definitions and firmware ABI updates

- add Xe MEI DG2 module support

- update Xe workarounds and engine handling for HuC/GSC

- update MEI GSC support for DG2

This enables HuC firmware initialization and authentication on DG2 hardware when using the Xe DRM driver."

The code is pending [3]here . It will be interesting to see if/when it's upstreamed for the Xe driver to improve the media experience for those on the Intel Arc A-Series hardware.



[1] https://www.phoronix.com/news/Intel-Xe-DG2-No-HuC

[2] https://www.phoronix.com/review/intel-xe-i915-linux-619

[3] https://gitlab.freedesktop.org/drm/xe/kernel/-/merge_requests/361