[Bug 2038087] Re: flash-kernel installs wrong DTB on Pi

[Heinrich Schuchardt]

The problem is reproducible:

Create file /etc/flash-kernel/machine with content

   Raspberry Pi 400 Rev 1.0

on any arm64 system and run flash-kernel:

$ sudo flash-kernel $(uname -r)
Using DTB: bcm2711-rpi-4-b.dtb
Installing /lib/firmware/6.2.0-1013-raspi/device-tree/broadcom/bcm2711-rpi-4-b.dtb into /boot/dtbs/6.2.0-1013-raspi/./bcm2711-rpi-4-b.dtb
Taking backup of bcm2711-rpi-4-b.dtb.
Installing new bcm2711-rpi-4-b.dtb.
flash-kernel: installing version 6.2.0-1013-raspi

The following change is enough to fix the issue:
--- db/all.db   2023-06-22 14:18:53.000000000 +0000
+++ /usr/share/flash-kernel/db/all.db   2023-10-02 11:46:14.211402418 +0000
@@ -1823,7 +1805,7 @@
 Machine: Raspberry Pi 4 Model B Rev 1.2
 Machine: Raspberry Pi 4 Model B Rev 1.4
 Machine: Raspberry Pi 4 Model B Rev 1.5
-Machine: Raspberry Pi *
+Machine: Raspberry Pi 4 *
 Kernel-Flavors: raspi raspi-nolpae
 Method: pi
 DTB-Id: bcm2711-rpi-4-b.dtb

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https://bugs.launchpad.net/bugs/2038087

Title:
  flash-kernel installs wrong DTB on Pi

Status in flash-kernel package in Ubuntu:
  Confirmed

Bug description:
  flash-kernel probably shouldn't even be dealing with the DTBs on Pi
  but it's picking the wrong one for some machine models. For example on
  a Raspberry Pi 400 Rev 1.0 it uses bcm2711-rpi-4-b.dtb. Same one
  Compute Module 3 and 3+.

  It's probably because in /usr/share/flash-kernel/db/all.db the catch-
  all

  Machine: Raspberry Pi *

  is listed before these above mentioned models (and others as well).

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