One of the features that sadly didn't make it into the recent Linux 6.19 merge window was the long-awaited AMD ISP4 driver for supporting the web camera found with the high-end [1]HP ZBook Ultra G1a and also expected to be used by future flagship AMD Ryzen laptops.

The AMD ISP4 image signal processing driver is the last piece of the software puzzle for getting the web camera working on the ZBook Ultra G1a and other future hardware for this superior web camera solution complete with hardware offloading on the open-source driver stack -- a better story than laptops with the newer Intel IPU tech requiring either closed-source user-space libraries or relying on the "Soft" ISP core from libcamera. The AMD ISP4 driver didn't make it to mainline in 2025 but at least so far the scope is limited given it's just the HP ZBook Ultra G1a and Ubuntu Linux users and the like can use out-of-tree support via the LTS OEM kernel builds.

This week the seventh revision of the AMD ISP4 driver patches were posted. There are various low-level code fixes/improvements, some style improvements, and other minor changes. There doesn't appear to be any changes too significant with this revision so hopefully we are hitting the end of the code churn before the driver is upstreamed.

Here's to hoping that the AMD ISP4 driver is ready for upstreaming come the Linux 6.20~7.0 merge window in February. Hitting the Linux 6.20~7.0 milestone is also important for AMD ISP4 support to be out-of-the-box with the likes of Ubuntu 26.04 LTS and Fedora 44 in the spring. HP ZBook Ultra G1a owners rolling their own Linux build can do so via [2]this LKML patch series .



[1] https://www.phoronix.com/search/HP+ZBook+Ultra+G1a

[2] https://lore.kernel.org/lkml/20251216091326.111977-1-Bin.Du@amd.com/