WCN6855 issues with latest linux-firmware

[Dmitry Baryshkov]

Hi,

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


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


-- 
With best wishes
Dmitry