On 27/02/2024 10:26, Krzysztof Kozlowski wrote: > On 08/02/2024 19:42, Seth Jenkins wrote: >> Hi, my name is Seth and I'm a member of the Google Project Zero >> security research team, >> >> I'm presently looking at the upstream code present in >> drivers/gpu/drm/exynos, enabled by kernel config CONFIG_DRM_EXYNOS. It >> appears to be well-maintained and regularly patched, but despite my >> best efforts I have had difficulty tracking down the end-users of this >> driver. I have not been able to find any recent examples of this >> driver being compiled into kernels Android devices or Samsung Smart > > Vendor Android? They do not use mainline kernels but some old stuff. > Android devices are well known of not using mainline kernels, but vendor > old, custom and poor stuff. I thought that's kind of obvious. :) > >> TV's (based on Samsung's open source repositories). I've also not been > > TVs not sure, but most likely even worse than above - even older, less > "mainline" kernels, because no one pushes them to do something like GKI > where at least you have to package vendor crap into module. > >> able to find any modern open-source codebases that utilize the ioctls >> exposed by this driver. > > Hm, that one should be. We have working display since years (10? 12? 15?). > >> >> I was hoping you may be able to point me towards modern usage of this >> driver - I assume it's present in kernels compiled for some subset of >> Exynos socs and in lieu of the CONFIG_DRM_SAMSUNG_DPU code? What >> kernels/end-devices would that be? > > All mainline supported devices. Open mainline kernel, go to DTS and > look. Now, if the question is how to get one, it's a different story. > Currently known widely-available devboards are Hardkernel and e850-96. > > For community, users and all list of devices see: exynos kernel wiki and > postmarketOS pages on mainlining (that's probably the most comprehensive > list). elinux page also might have something. One more thought, because you entirely skipped me in the CC list. Please use scripts/get_maintatainers, to obtain the list of maintainers. In that case you could get some sort of answer from me 20 days earlier, because I scroll through samsung-soc occasionally. get_maintainers.pl prints my name, so I just don't need to look at mailing list. Best regards, Krzysztof
