** Description changed: + [SRU Justification] + + [Impact] + + On a MIPI camera through Intel IPU6 platform that its raw V4L2 loopback + interface is preserved for Intel Camera HAL libraries, a relay daemon + + v4l2loopback is used to allow the usage of legacy V4L2 based apps. + + By design, the relayd will open v4l2sink to v4l2loopback OUTPUT deivce, + and it will only open libcamhal based GStreamer source element, and + therefore underlying camera hardware, until received new client + notifications via V4L2 Event API that is introduced in this SRU. + + Besides, frame sizes/intervals enumeration is also fixed to meet better + compliance with user apps. + + [Test Plan] + + v4l2loopback doesn't support V4L2 Event API until recently, so requests + for the usage will always fail: + + struct v4l2_event_subscription sub; + int fd; + + memset (&sub, 0, sizeof (sub)); + sub.type = ...; + if (ioctl (fd, VIDIOC_SUBSCRIBE_EVENT, &sub) == 0) // fail + + With this fix, it shall support Event API operations, e.g. + VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT, VIDIOC_DQEVENT. + + [Where problems could occur] + + While a custom type of V4L2 event is now registered for OEM projects, + software expected same ID (numerically equivalent to + V4L2_EVENT_PRIVATE_START) may get confused. While this falls in the + private usage section, it's not supposed to be used in general, and when + it does, it should be under some presumptions, e.g. selected hardware, + so it's unlikely to happen on OEM projects. + + For generic Ubuntu, programs may begin to take advantage of this new + capability to update its UI, or to take other actions after receiving + desired events. There might be behavior changes, but should be under the + original design if was done carefully. + + [Other Info] + + For Focal backports, 0.12.5-1 is equivalent to 0.12.3-1ubuntu0.3 plus + micro version updates, so there should be little risk backport a new + release, and we can drop additional patches carried. This implies bug + 1905613. + + ========= original bug report ========== + Please backport v4l2loopback 0.12.5-1 (universe) from hirsute to focal, groovy. Reason for the backport: ======================== Makes dkms module compatible with 5.8 kernels eg linux-generic-hwe-20.04-edge Testing: ======== Mark off items in the checklist [X] as you test them, but please leave the checklist so that backporters can quickly evaluate the state of testing. You can test-build the backport in your PPA with backportpackage: $ backportpackage -u ppa:<lp username>/<ppa name> -s hirsute -d focal v4l2loopback $ backportpackage -u ppa:<lp username>/<ppa name> -s hirsute -d groovy v4l2loopback * focal: [x] Package builds without modification [x] v4l2loopback-source installs cleanly and runs [x] v4l2loopback-dkms installs cleanly and runs [x] v4l2loopback-utils installs cleanly and runs * groovy: [x] Package builds without modification [x] v4l2loopback-source installs cleanly and runs [x] v4l2loopback-dkms installs cleanly and runs [x] v4l2loopback-utils installs cleanly and runs Reverse dependencies: ===================== The following reverse-dependencies need to be tested against the new version of v4l2loopback. For reverse-build-dependencies (-Indep), please test that the package still builds against the new v4l2loopback. For reverse-dependencies, please test that the version of the package currently in the release still works with the new v4l2loopback installed. Reverse- Recommends, Suggests, and Enhances don't need to be tested, and are listed for completeness-sake. v4l2loopback-source ------------------- v4l2loopback-dkms ----------------- * gem-plugin-v4l2 - [ ] focal (Reverse-Suggests) - [ ] groovy (Reverse-Suggests) + [ ] focal (Reverse-Suggests) + [ ] groovy (Reverse-Suggests) * xpra - [ ] focal (Reverse-Suggests) - [ ] groovy (Reverse-Suggests) + [ ] focal (Reverse-Suggests) + [ ] groovy (Reverse-Suggests) v4l2loopback-utils ------------------
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1905613 Title: Please backport v4l2loopback 0.12.5-1 (universe) from hirsute To manage notifications about this bug go to: https://bugs.launchpad.net/focal-backports/+bug/1905613/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
