WCN6855 issues with latest linux-firmware

[Kalle Valo]

Dmitry Baryshkov <dmitry.baryshkov at linaro.org> writes:

> The wcn6855 WiFi chip stopped working for me after an update to the
> latest linux-firmware (Linux 5.18-rc2). I can reproduce it with both
> hw2.0 and hw2.1 chips.
>
> Here is the set of kernel messages I'm getting from ath11k_pci driver:
>
> [    4.422391] ath11k_pci 0000:01:00.0: Adding to iommu group 3
> [    4.429571] ath11k_pci 0000:01:00.0: BAR 0: assigned [mem
> 0x60400000-0x605fffff 64bit]
> [    4.437857] ath11k_pci 0000:01:00.0: enabling device (0000 -> 0002)
> [    4.445323] ath11k_pci 0000:01:00.0: MSI vectors: 1
> [    4.450375] ath11k_pci 0000:01:00.0: wcn6855 hw2.0
> [    5.378488] ath11k_pci 0000:01:00.0: chip_id 0x2 chip_family 0xb
> board_id 0x8c soc_id 0x400c0200
> [    5.392898] ath11k_pci 0000:01:00.0: fw_version 0x110f0c35
> fw_build_timestamp 2022-03-30 09:05 fw_build_id
> QC_IMAGE_VERSION_STRING=WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.7
> [    5.420648] ath11k_pci 0000:01:00.0: failed to fetch board data for
> bus=pci,vendor=17cb,device=1103,subsystem-vendor=17cb,subsystem-device=0108,qmi-chip-id=2,qmi-board-id=140
> from ath11k/WCN6855/hw2.0/board-2.bin
> [   15.686398] ath11k_pci 0000:01:00.0: failed to wait board file
> download request: -110
> [   15.694530] ath11k_pci 0000:01:00.0: qmi failed to load bdf file
> [   15.700784] ath11k_pci 0000:01:00.0: failed to load board data file: -110

What WCN6855 hardware are you exactly using? (make, model etc) And what
board file are you using? md5sums of all firmware files is the best.

> With the earlier firmware from [1] I'm getting the following trace
> (and WiFi device probes). Interestingly enough the chip_id differs
> between these firmware versions.
>
> [    4.352661] ath11k_pci 0000:01:00.0: Adding to iommu group 3
> [    4.359192] ath11k_pci 0000:01:00.0: BAR 0: assigned [mem
> 0x60400000-0x605fffff 64bit]
> [    4.367466] ath11k_pci 0000:01:00.0: enabling device (0000 -> 0002)
> [    4.374916] ath11k_pci 0000:01:00.0: MSI vectors: 1
> [    4.379963] ath11k_pci 0000:01:00.0: wcn6855 hw2.0
> [    5.273930] ath11k_pci 0000:01:00.0: chip_id 0x0 chip_family 0xb
> board_id 0x8c soc_id 0x400c0200
> [    5.286020] ath11k_pci 0000:01:00.0: fw_version 0x110406b8
> fw_build_timestamp 2021-01-08 06:14 fw_build_id
> QC_IMAGE_VERSION_STRING=WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
> [    5.312464] ath11k_pci 0000:01:00.0: failed to fetch board data for
> bus=pci,vendor=17cb,device=1103,subsystem-vendor=17cb,subsystem-device=0108,qmi-chip-id=0,qmi-board-id=140
> from ath11k/WCN6855/hw2.0/board-2.bin
> [    5.384315] ath11k_pci 0000:01:00.0: leaving PCI ASPM disabled to
> avoid MHI M2 problems
>
>
>
> [1]
> https://chromium.googlesource.com/chromiumos/third_party/linux-firmware/+/d233ddd89abe06448070471963a58c0a7da81d79/ath11k/WCN6855/hw2.0

That looks like an unsupported firmware version. I recommend using
_both_ firmwares and board files only from ath11k-firmware.git[1] or
upstream linux-firmware[2].

[1] https://github.com/kvalo/ath11k-firmware

[2] https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/

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