WCN6855 issues with latest linux-firmware

[Dmitry Baryshkov]

On Mon, 16 May 2022 at 16:01, Kalle Valo <kvalo at kernel.org> wrote:
>
> Dmitry Baryshkov <dmitry.baryshkov at linaro.org> writes:
>
> > On 12/05/2022 21:23, Kalle Valo wrote:
> >> 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)
> >
> > I have asked for the hw details. The user guide for the HDK8450 lists
> > WCN6856 chip and also mentions 'Qualcomm® FastConnect™ 6900 Systems'.
>
> So the chip was included within HDK8450? It was not installed to the
> board separately or anything like that?

Yes, it's the included chip.

>
> >> And what
> >> board file are you using? md5sums of all firmware files is the best.
> >
> > # md5sum /lib/firmware/ath11k/WCN6855/hw2.1/*
> > 460fbd5ddc57b3d2efbf1ca976f78b90
> > /lib/firmware/ath11k/WCN6855/hw2.1/amss.bin
> > 88b3a4fbde8cab4493f0060ae3b5dee3
> > /lib/firmware/ath11k/WCN6855/hw2.1/board-2.bin
> > 7fd1c2337b0b6502588d3141e205e735
> > /lib/firmware/ath11k/WCN6855/hw2.1/board.bin
> > d1460fc1c4595d0d22f82d5baeaabbd8  /lib/firmware/ath11k/WCN6855/hw2.1/m3.bin
> > f67be83659c790fe15d1e42af501e9fa
> > /lib/firmware/ath11k/WCN6855/hw2.1/regdb.bin
>
> So you are using a separate board.bin file, where did you get it? ath11k
> board files are different so you cannot take the board file from
> elsewhere.

The board file comes together with the board, as a bunch
bdwlan.e*/bdwlang.e* files on the modem partition.
I was using the one corresponding to the board id.

But note, that the driver reports that it did not get the 'failed to
wait board file download request'. So, it would be good to get the
board file into the board-2.bin, but for me it looks like a separate
story.

> Can you file this to bugzilla:
>
> https://wireless.wiki.kernel.org/en/users/drivers/ath11k/bugreport
>
> That way it's easier to track and I can try to find the correct board
> file.

Done: https://bugzilla.kernel.org/show_bug.cgi?id=215987

-- 
With best wishes
Dmitry