WCN6855: Request: Support ThinkPad X13s 21BY-S03Y00

[Johan Hovold]

On Wed, Sep 06, 2023 at 11:45:14AM +0300, Kalle Valo wrote:
> Alex R <alex at ironrobin.net> writes:
> 
> > Trying the latest board-2.bin from
> > https://github.com/kvalo/ath11k-firmware/tree/master/WCN6855 and my
> > wlan0 fails to come up. dmesg: https://pastebin.com/CWHpD0kC
> >
> > My other X13s system (21BX-0015US) works fine so I am wondering if my
> > new X13s (21BY-S03Y00) product type is unsupported.
> 
> For easier tracking can you please file a bug to bugzilla:
> 
> https://wireless.wiki.kernel.org/en/users/drivers/ath11k/bugreport
> 
> Also adding Johan in case he has any ideas or knows what has changed in
> 21BY-S03Y00.

I've asked for some more details from Alex over IRC, but it's currently
not clear why there are problems with this particular machine.

It appears that firmware download fails, but apparently only sometimes.
And it fails before loading board-2.bin so that bit of the report looks
irrelevant:

	[    2.195948] ath11k_pci 0006:01:00.0: wcn6855 hw2.1
	...
	[    2.423948] mhi mhi1: Requested to power ON
	[    2.427589] mhi mhi1: Power on setup success
	...
	[    4.035111] mhi mhi1: Wait for device to enter SBL or Mission mode
	...
	[   23.518986] mhi mhi1: MHI did not load AMSS, ret:-5

IIUC, things got worse with 6.5, possible due to random changes in
timing.

You need to provide a lot more detail, Alex:

For example, did this module ever work, and if so with which kernel
version? How is this module identified when it starts successfully? How
did things change in 6.5? Have you verified that you're using the same
fw on both the working and non-working machine (not just board-2.bin,
which does not seem to be involved here)? You also said something on IRC
about dual-booting Windows making a difference, etc. etc.

Johan