Em Wed, 12 Jun 2024 11:34:30 +0300 Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> escreveu: > Focussing on this topic, if we're brainstorming memory management for > media devices, I'd like to throw in a controversial idea. In addition to > being clearer on the fact that USERPTR is deprecated, I would like to > deprecate MMAP too and only focus on DMABUF. I believe Linux needs a > centralized buffer allocator, instead of having multiple allocation APIs > scattered in different places. There are design ideas in gralloc that we > could benefit from. Deprecating USERPTR is doable, as not many apps use it, and they're mostly focused on complex camera/ARM scenario. Now, deprecating MMAP at V4L2 core is a different history: lots of different userspace programs, including browsers and proprietary apps like zoom, etc. rely on MMAP support. We can only consider deprecating MMAP once applications switch to DMABUF. Thanks, Mauro
