[Bug 2061747] Re: obsolete out-of-tree ivsc dkms in favor of in-tree one

[Anthony Wong]

This fix also requires kernel patches in this series:
https://lists.ubuntu.com/archives/kernel-team/2024-April/150378.html

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https://bugs.launchpad.net/bugs/2061747

Title:
  obsolete out-of-tree ivsc dkms in favor of in-tree one

Status in ipu6-drivers package in Ubuntu:
  Fix Committed
Status in ivsc-driver package in Ubuntu:
  Invalid
Status in linux package in Ubuntu:
  In Progress
Status in linux-meta package in Ubuntu:
  Triaged
Status in linux-meta-oem-6.8 package in Ubuntu:
  Triaged
Status in linux-oem-6.8 package in Ubuntu:
  In Progress
Status in ipu6-drivers source package in Noble:
  Fix Committed
Status in ivsc-driver source package in Noble:
  Invalid
Status in linux source package in Noble:
  In Progress
Status in linux-meta source package in Noble:
  Triaged
Status in linux-meta-oem-6.8 source package in Noble:
  Triaged
Status in linux-oem-6.8 source package in Noble:
  In Progress

Bug description:
  [SRU Justification]

  BugLink: https://bugs.launchpad.net/bugs/2061747

  [Impact]

  Starting from kernel v6.8, Intel demands the use of in-tree VSC driver
  instead of the out-of-tree dkms originated from
  https://github.com/intel/ivsc-driver.

  [Fix]

  The in-tree vsc driver as of v6.8 still needs a few fixes to achieve
  the same support level to launch Intel IPU6 Camera devices. Commit
  1,3, and 4 are to add supported devices and platforms. Commit 2
  resolves an issue after resumed.

  [Test Case]

  This is supposed to work together with the updated dkms, which shall
  also be built along with the kernel itself as linux-modules-
  ipu6-<variant>. Install the corresponding kernel/modules packages and
  test camera functions.

  [Where problems could occur]

  While this is the first time we switch to in-tree VSC driver, and the
  out-of-tree driver is not aligned at the time of transition and
  probably never will, the provided functions and verified stability
  issues may vary.

  [Other Info]

  The dkms is created to be compatible of multiple kernel versions, yet
  the in-tree vsc driver transitioning should only happen for kernel >=
  v6.8. That is, oem-6.8, noble and linux-unstable will be nominated.

  ========== original bug description ==========

  Starting from kernel v6.8 (yet from the code diff it's v6.6), Intel
  demands the use of in-tree IVSC drivers instead of out-of-tree dkms
  from https://github.com/intel/ivsc-driver.

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