[Bug 1854487] Re: Add Raspberry Pi 4 rev 1.2 entry

[Dave Jones]

** Description changed:

+ Impact
+ ======
+ 
  A new variant of the Raspberry Pi 4 (revision 1.2) has been released
- (presumably to deal with the USB-C power issue [1]). An entry will need
- to be added to the flash-kernel database to permit it to recognize the
- platform.
+ (presumably to deal with the USB-C power issue [1]). Without a
+ corresponding entry in the flash-kernel database, users of this board
+ will receive an error whenever flash-kernel is run (e.g. on kernel
+ updates); see LP: #1848790 comment #44 for an example.
  
  [1] https://www.scorpia.co.uk/2019/06/28/pi4-not-working-with-some-
  chargers-or-why-you-need-two-cc-resistors/
+ 
+ 
+ Test Case
+ =========
+ 
+ * On a Pi 4 Rev 1.2 board, boot an Eoan image (working around LP: #1848790 as necessary)
+ * Attempt to run "sudo flash-kernel"
+ * Observe the "Unsupported platform" message
+ * Run "sudo add-apt-repository ppa:waveform/flash-kernel" to add the PPA containing the test package
+ * Run "sudo apt upgrade" to upgrade the flash-kernel installation
+ * Run "sudo flash-kernel" once more, observe no error
+ 
+ 
+ Regression Potential
+ ====================
+ 
+ Extremely low; the change is a one liner adding a matching "Machine"
+ line to the database. It doesn't remove or alter existing lines. The
+ worst case scenario is that the Machine line doesn't match the model in
+ the device-tree (in which case it'll still produce "Unsupported
+ platform").
+ 
+ 
+ Other Info
+ ==========
+ 
+ The following branch contains the relevant changes:
+ https://code.launchpad.net/~waveform/ubuntu/+source/flash-kernel/+git
+ /flash-kernel/+ref/ubuntu/eoan-devel

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https://bugs.launchpad.net/bugs/1854487

Title:
  Add Raspberry Pi 4 rev 1.2 entry

Status in flash-kernel package in Ubuntu:
  Fix Released
Status in flash-kernel source package in Eoan:
  Triaged

Bug description:
  Impact
  ======

  A new variant of the Raspberry Pi 4 (revision 1.2) has been released
  (presumably to deal with the USB-C power issue [1]). Without a
  corresponding entry in the flash-kernel database, users of this board
  will receive an error whenever flash-kernel is run (e.g. on kernel
  updates); see LP: #1848790 comment #44 for an example.

  [1] https://www.scorpia.co.uk/2019/06/28/pi4-not-working-with-some-
  chargers-or-why-you-need-two-cc-resistors/

  
  Test Case
  =========

  * On a Pi 4 Rev 1.2 board, boot an Eoan image (working around LP: #1848790 as necessary)
  * Attempt to run "sudo flash-kernel"
  * Observe the "Unsupported platform" message
  * Run "sudo add-apt-repository ppa:waveform/flash-kernel" to add the PPA containing the test package
  * Run "sudo apt upgrade" to upgrade the flash-kernel installation
  * Run "sudo flash-kernel" once more, observe no error

  
  Regression Potential
  ====================

  Extremely low; the change is a one liner adding a matching "Machine"
  line to the database. It doesn't remove or alter existing lines. The
  worst case scenario is that the Machine line doesn't match the model
  in the device-tree (in which case it'll still produce "Unsupported
  platform").

  
  Other Info
  ==========

  The following branch contains the relevant changes:
  https://code.launchpad.net/~waveform/ubuntu/+source/flash-kernel/+git
  /flash-kernel/+ref/ubuntu/eoan-devel

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