On Wed, Jul 25, 2018 at 5:42 AM, Emil Velikov <emil.l.veli...@gmail.com> wrote: > On 25 July 2018 at 00:21, John Stultz <john.stu...@linaro.org> wrote: >> From: Yong Yao <yong....@intel.com> >> >> This is a forward port of a patch from the AOSP/master branch: >> https://android.googlesource.com/platform/external/mesa3d/+/b1e5fad1db4c1d51c7ae3a033b100a8429ae5415%5E%21/ >> >> Which allows boards to provide their own custom copy of mesa. >> > Thanks for sorting these out John. > > My understanding was that when a custom project repo is used one > handles that in the device manifest. Roughly as: > - foo.xml -> contains vast majority of the git repos with associated tags/etc > - local.xml -> removes any repo/project from ^^, adds new one > > Is that no longer the case, or I simply misremember how Android does things?
So, I'm not aware of the specific history behind this patch. And I can't speak for Google, there has been a general push via the Treble efforts to standardize the Android system image, and to push vendors to keep any device specific bits into their own device directory. So there is a strong disincentive to modify projects in AOSP and in order to include things like devboards into AOSP, the push has been to limit any device specific changes to only the device directory git tree. So while one can technically still replace projects with local repos (and this is very useful for development!), I think they do not want folks doing this for shipping devices. We are trying to make sure device support is pushed upstream to fdo, and then align AOSP's mesa to that, but one could imagine a board that doesn't have support upstream in mesa, and provides its own copy of mesa in the device directory. This patch allows the build to override the default mesa project with the vendor provided mesa. One concrete example here, which unfortunately I've not had time to work on, might be if we try to integrate the revived lima work to support HiKey's mali utgard gpu. That would require a local mesa tree along with the developmental kernel driver. thanks -john _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
