[Bug 2069802] [NEW] [SRU] flash-kernel to support xilinx platforms with noble kernel

[Talha Can Havadar]

Public bug reported:

[ Impact ]

 * With the current version of flash-kernel, users wont be able to boot
into xilinx devices using optimised noble kernel because of the renaming
of device-trees in kernel and cma configuration changes.

 * We need to fix this issue to keep support for xilinx devices in noble
as well. This must not be back-ported into jammy since the kernel in
jammy keeps the old names for device-trees and cma configuration in
there didn't change

 * Patch will fix the issue by updating bootscript and `its` file to
point correct device-tree files.

[ Test Plan ]

 * Flash the new image generated with new flash-kernel that has this fix
 * Try booting with new image
 * You should be able to reach the login prompt and be able to login using default username and password
 * This must work for all Kria devices listed below:
  - KV260
  - KR260
  - KD240

[ Where problems could occur ]
 * This change could only impact Xilinx Kria devices since it will only touch the files used by Xilinx Kria platforms including the ones listed above in test plan
 * Since this is an enablement patch for Ubuntu Noble image on Xilinx Kria platforms, there shouldnt be an impact to devices in the field.
 * If the patch is broken then the devices listed above will still continue to not work.

[ Other Info ]
 
 * This is based on changes in new optimised kernel: https://code.launchpad.net/~canonical-kernel/ubuntu/+source/linux-xilinx/+git/noble

** Affects: flash-kernel (Ubuntu)
     Importance: Undecided
     Assignee: Talha Can Havadar (tchavadar)
         Status: In Progress

** Changed in: flash-kernel (Ubuntu)
     Assignee: (unassigned) => Talha Can Havadar (tchavadar)

** Changed in: flash-kernel (Ubuntu)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/2069802

Title:
  [SRU] flash-kernel to support xilinx platforms with noble kernel

Status in flash-kernel package in Ubuntu:
  In Progress

Bug description:
  [ Impact ]

   * With the current version of flash-kernel, users wont be able to
  boot into xilinx devices using optimised noble kernel because of the
  renaming of device-trees in kernel and cma configuration changes.

   * We need to fix this issue to keep support for xilinx devices in
  noble as well. This must not be back-ported into jammy since the
  kernel in jammy keeps the old names for device-trees and cma
  configuration in there didn't change

   * Patch will fix the issue by updating bootscript and `its` file to
  point correct device-tree files.

  [ Test Plan ]

   * Flash the new image generated with new flash-kernel that has this fix
   * Try booting with new image
   * You should be able to reach the login prompt and be able to login using default username and password
   * This must work for all Kria devices listed below:
    - KV260
    - KR260
    - KD240

  [ Where problems could occur ]
   * This change could only impact Xilinx Kria devices since it will only touch the files used by Xilinx Kria platforms including the ones listed above in test plan
   * Since this is an enablement patch for Ubuntu Noble image on Xilinx Kria platforms, there shouldnt be an impact to devices in the field.
   * If the patch is broken then the devices listed above will still continue to not work.

  [ Other Info ]
   
   * This is based on changes in new optimised kernel: https://code.launchpad.net/~canonical-kernel/ubuntu/+source/linux-xilinx/+git/noble

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