[Bug 1912905] Re: Can't find WLAN device on RPI-CM4L with 20.10 armhf preinstall server image

[Juerg Haefliger]

So on arm64 this works by accident because the kernel loads the fw file:
brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt

[   11.512059] brcmfmac: F1 signature read @0x18000000=0x15264345
[   11.530710] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[   11.540495] usbcore: registered new interface driver brcmfmac
[   11.781454] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[   11.802739] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Mar 23 2020 02:19:54 version 7.45.206 (r725000 CY) FWID 01-88ee44ea


But on armhf it tries to load a non-existing fw file:
brcm/brcmfmac43455-sdio.raspberrypi,4-compute-module.txt


[   11.212993] brcmfmac: F1 signature read @0x18000000=0x15264345
[   11.255150] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[   11.264126] usbcore: registered new interface driver brcmfmac
[   11.287281] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43455-sdio.raspberrypi,4-compute-module.txt failed with error -2
[   11.301774] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43455-sdio.txt failed with error -2
[   12.333944] brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50


** Also affects: linux-firmware-raspi2 (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1912905

Title:
  Can't find WLAN device on RPI-CM4L with 20.10 armhf preinstall server
  image

Status in linux-firmware-raspi2 package in Ubuntu:
  New
Status in linux-raspi package in Ubuntu:
  New
Status in linux-firmware-raspi2 source package in Groovy:
  New
Status in linux-raspi source package in Groovy:
  Confirmed

Bug description:
  [Description]
  Can't find WLAN device on Raspberry Pi CM4L with 20.10 armhf preinstall server image.
  This only happens on armhf image.

  [Steps to reproduce]
  1. Flash image http://cdimage.ubuntu.com/ubuntu/releases/groovy/release/ubuntu-20.10-preinstalled-server-armhf+raspi.img.xz
  2. Boot into system
  5. Check wireless device using "ip a"

  [Expected result]
  Can't find WLAN device

  [Actual result]
  WLAN device works fine

  [Additional information]
  Hardware: RPI-CM4L
  Kernel Version: 5.8.0-1006-raspi, 5.8.0-1012-raspi, 5.8.0-1013-raspi

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