[Bug 1950633] Re: [SRU] Update wifi firmware for future zero 2 boards

[Launchpad Bug Tracker]

This bug was fixed in the package linux-firmware-raspi2 -
6-0ubuntu0~20.04.1

---------------
linux-firmware-raspi2 (6-0ubuntu0~20.04.1) focal; urgency=medium

  * Backport to focal
    - New upstream boot firmware release, 1.20211118
    - New upstream wifi firmware release, 20210315-3+rpt4 (LP: #1950633)

      [ Phil Elwell ]
      - Add 43438 firmware 7.45.98.118 + external clm_blob
      - Add 43455 firmware 7.45.241 and clm_blob
      - Add "minimal" firmware for AP+STA mode
      - Add 43436S firmware
        - Future Zero 2 W boards will have an alternative version of 43436
          that should have different firmware, named brcmfmac43436s-sdio
      - Update the Cypress 43455 WLAN firmware to 7.45.241, and include the
        new clm_blob with all-zero regrevs (tried previously but with a bad
        blob)

    - Added diversions for new 43436s firmware (including overrides for any
      future external clm_blob)
    - Add autopkgtest for co-existence with linux-firmware (LP: #1927711)

 -- Dave Jones <dave.jones at canonical.com>  Thu, 27 Jan 2022 13:31:58
+0000

** Changed in: linux-firmware-raspi2 (Ubuntu Focal)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1950633

Title:
  [SRU] Update wifi firmware for future zero 2 boards

Status in linux-firmware-raspi package in Ubuntu:
  Fix Committed
Status in linux-firmware-raspi2 package in Ubuntu:
  New
Status in linux-firmware-raspi2 source package in Focal:
  Fix Released
Status in linux-firmware-raspi2 source package in Impish:
  Fix Released
Status in linux-firmware-raspi source package in Jammy:
  Fix Committed

Bug description:
  [Impact]

  Future Pi Zero 2 boards will have a slightly different wifi chip on
  board which requires a variant of the current firmware. This is being
  added to the rename of linux-firmware-raspi2 (to linux-firmware-raspi)
  for jammy, but requires adding to the existing linux-firmware-raspi2
  package for focal and impish, otherwise users on newer variants of the
  Pi Zero 2 will find themselves without any wifi connectivity (or, in
  fact, any connectivity given there is no ethernet on these boards).

  [Test Plan]

  Boards with the new wifi chip are not yet available, so the following
  test plan is the best we can do:

  * Flash a fresh SD card with the appropriate server image
  * Boot the card on the Pi under test with *no* ethernet attached (if the board supports it)
  * Edit /etc/netplan/50-cloud-init.yaml to include an appropriate wifi configuration for your local AP
  * sudo netplan apply
  * ip addr  # verify wlan0 is up and has a valid address
  * Enable -proposed and update
  * sudo apt install linux-firmware-raspi2
  * sudo reboot
  * ip addr  # verify wlan0 is up and has a valid address

  This should be performed on all supported boards with wifi (3B, 3A+,
  3B+, 4B, 400) on both supported architectures (armhf, and arm64).

  [Regression Potential]

  As we're updating the wifi firmware, the obvious possible regression
  is failure of the wifi interface (hence the testing of all supported
  boards in the plan).

  [Original Description]

  In the upstream wifi firmware package (version 1:20210315-3+rpt3 of
  the firmware-nonfree package), the following is noted in the
  changelog: "Future Zero 2 W boards will have an alternative version of
  43436 that should have different firmware, named brcmfmac43436s-sdio".
  We need to incorporate these blobs to support future variants of this
  board.

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