The Vulkan WG has released VK_KHR_video_decode_vp9. I did initial work on a Mesa extensions for this a good while back, and I've updated the radv code with help from AMD and Igalia to the final specification.
There is an open MR[1] for radv to add support for vp9 decoding on navi10+ with the latest firmware images in linux-firmware. It is currently passing all VK-GL-CTS tests for VP9 decode.
Adding this decode extension is a big milestone for me as I think it now covers all the reasons I originally got involved in Vulkan Video as signed off, there is still lots to do and I'll stay involved, but it's been great to see the contributions from others and how there is a bit of Vulkan Video community upstream in Mesa.
[1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35398
SOCIAL SHARE CARD GENERATOR