[Bug 1965260] Re: SRU: Detect RAM size automatically

[Lukas Märdian]

After some discussion with the SRU team (@sil2100) we agreed that this
should be an exception to the full-version-backport SRU policy, due to
very low regression risk.

I've used the latest debdiff provided (containing "commmit" -> "commit"
typo fix in d/changelog and correct "Maintainer:" headers in d/control).
I've slightly adopted the version string: "20220228+g0ad88bf-0ubuntu1"
-> "20220228+g0ad88bf-0ubuntu1~22.04.1" in order to provide a proper
upgrade path from Jammy to Kinetic.

https://launchpad.net/ubuntu/jammy/+queue?queue_state=1&queue_text=nezha-
boot0

** Changed in: nezha-boot0 (Ubuntu Jammy)
       Status: New => In Progress

-- 
You received this bug notification because you are a member of Ubuntu
Sponsors Team, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1965260

Title:
  SRU: Detect RAM size automatically

Status in nezha-boot0 package in Ubuntu:
  Fix Released
Status in nezha-boot0 source package in Jammy:
  In Progress

Bug description:
  https://github.com/smaeul/sun20i_d1_spl/commits/d1-2022-01-22, commit
  525883d3721f4c4d78b498e780b44e85d0676abf contains patches to detect
  the RAM size automatically.

  [Impact]

  If the memory is not discovered automatically, the Nezha can't boot
  without an additional memory node in the device tree: the issue is
  that the Nezha boards comes now with 2 different amounts of memory,
  1GB or 2GB. So the additional device tree node can't cover both
  boards.

  It is essential to backport this fix to Jammy as we intend to provide
  first support for the Nezha board in 22.04.1.

  [Test Plan]

  To test the fix is correct, one can simply use this nezha-boot0 and
  check that the next stage bootloader (u-boot-nezha) advertises the
  right amount of memory for the board, which is displayed at boot right
  after the banner:

  U-Boot 2022.04 (Apr 21 2022 - 09:19:39 +0000)

  DRAM:  1 GiB
  sunxi_set_gate: (CLK#24) unhandled

  [Where problems could occur]

  The update will not introduce regressions as this package is *not*
  used since we did not deliver images for the Nezha board yet, support
  for this board is an additional feature scheduled for 22.04.1.

  [Other Info]

  Note that this only fixes the memory detection from boot0 to u-boot,
  another similar patch is needed for u-boot-nezha to patch the kernel
  device tree.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nezha-boot0/+bug/1965260/+subscriptions