it is indeed a not so obvious situation… I won’t be able to comment much on the ‘old’ Android releases from QCOM, since we are not involved there, we are just passing them over (when they come to us), and I cannot comment on availability on any newer releases…
However we have started a project to get DB410c to work , hopefully well, with AOSP. The goal is to get AOSP using the QCOM LT kernel tree (currently based on 4.14 LTS) and the mesa/freedreno open source graphics. Basically reusing the pieces we have been using in our Linux releases since the launch, but with the AOSP user space (e.g. as much upstream as possible, and with no user space blob).
To set up an AOSP workspace and track this work:
We use the following kernel branch:
Which is basically the result of merging android-common and the QCOM LT branch, more or less.
We are daily builds that attempts to build AOSP master every day, published here: