First obtain local copy of dEQP repo, for instance git clone https://github.com/KhronosGroup/VK-GL-CTS
Then checkout desired branch/tag/commit in VK-GL-CTS, for instance git checkout origin/vulkan-cts-1.3.4.1
Finally run this script inside the chroot . update.sh VK-GL-CTS
Test the ebuild using emerge-volteer deqp
If there is a configure failure check if a new external tarball needs to be added to update.sh and the ebuild.
You may have to update the manifest ebuild deqp-... manifest
Double check that the paths of the main test lists for egl.txt, gles*.txt are still correct (renaming from master -> main going on) ls VK-GL-CTS/android/cts/main/