QCA6174 hw2.1 irq_mode=0 broken on 4.2-rc3, working on 4.1.2

[Enrico Tagliavini]

Hi Alexandre,

I think you have a different issue. In my case it doesn't take long to
load the firmware. It works for me as well with irq_mode=1, however
this was not needed with the previous kernel (4.1.2 as provided by
fedora updates-testing repo). Also Michał sees a problem with my
system.

I should also mention I made my firmware from the Windows driver with
dissect.py. I assume this is correct since it worked for an older
kernel, but I actually have no idea. And I also have no idea how to
generate the fw with API 5 (if this makes any difference, but since it
was not mentioned already I suppose it does not).

Thank you anyway :)

On 28 July 2015 at 17:12, Alexandre Maloteaux <a.maloteaux at gmail.com> wrote:
> Hi Enrico
>
> I had the same issue a few days ago on an Eurocom P5 Pro.
> I manage to get it working with the help of michal  by compiling the
> kvalo kernel master branch : https://github.com/kvalo/ath
>
> And then using this ath10k.conf file in /etc/modprobe.d
>
> options ath10k_core skip_otp=y
> options ath10k_pci  irq_mode=1
>
> It works on my archlinux system but firmware loading take 1 minute
> between each retry, so it takes 2 minutes to get the card up and
> running. I have not yet found a solution to this issue.
>
> Best Regards
>
> On 07/28/2015 03:57 PM, Enrico Tagliavini wrote:
>> I was testing the kernel from Fedora rawhide to test some issue
>> related to the sound card. So this is 4.2 rc3 as released by Linus
>> plus some Fedora patch. Nothing related to ath10k as far as I can see.
>>
>> Bisecting would require a lot of time. I'm doing the full RPM package, fe
>> including modules signature and so on and I'm doing this in my free
>> time.This wont work for bisecting. I have to setup something else. Is
>> it ok if I restrict the bisect on the ath10k tree? That has enough
>> commit already to begin with, plus I'm going to be on the road in less
>> than two weeks.
>>
>> On 28 July 2015 at 13:26, Michal Kazior <michal.kazior at tieto.com> wrote:
>>> On 28 July 2015 at 13:00, Enrico Tagliavini <enrico.tagliavini at gmail.com> wrote:
>>>> Hi Michal,
>>>>
>>>> this is the dmesg output from a boot with kernel 4.1.2 with patch to
>>>> make the firmware load [1]
>>>>
>>>> Jul 26 10:07:42 alientux.saurisiamonoi.org kernel: ath10k_pci
>>>> 0000:03:00.0: enabling device (0000 -> 0002)
>>>> Jul 26 10:07:42 alientux.saurisiamonoi.org kernel: ath10k_pci
>>>> 0000:03:00.0: pci irq msi-x interrupts 8 irq_mode 0 reset_mode 0
>>>> Jul 26 10:07:42 alientux.saurisiamonoi.org kernel: ath10k_pci
>>>> 0000:03:00.0: Direct firmware load for ath10k/cal-pci-0000:03:00.0.bin
>>>> failed with error -2
>>>> Jul 26 10:07:44 alientux.saurisiamonoi.org kernel: ath10k_pci
>>>> 0000:03:00.0: qca6174 hw2.1 (0x05010000, 0x003405ff) fw
>>>> killer-n1525-fw api 4 htt 3.0 wmi 4 cal otp max_sta 32
>>>> Jul 26 10:07:44 alientux.saurisiamonoi.org kernel: ath10k_pci
>>>> 0000:03:00.0: debug 0 debugfs 1 tracing 0 dfs 0 testmode 0
>>>> Jul 26 10:07:44 alientux.saurisiamonoi.org kernel: ath10k_pci
>>>> 0000:03:00.0 wlp3s0: renamed from wlan0
>>>>
>>>> I saw the report you mentioned (I'm subscribed to ath10k and try to
>>>> keep it up with it). Not being expert at all I was not sure it was the
>>>> same or not. Also there seems to be a difference that with irq_mode=1
>>>> for me it just works like before.
>>> I'm quite puzzled with the above printout. So either there's some
>>> weird regression either in driver or the pci subsystem. It's good you
>>> posted ;-)
>>>
>>> Just to be clear: were you using 4.2-rc3 as in from Linus' tree or Kalle's tree?
>>>
>>> Asking for a `git bisect` is probably a bit excessive - but it would
>>> help a lot. I guess you'd have to manually cherry-pick qca6174 hw2 fix
>>> [1] while bisecting.
>>>
>>> If bisect is too much I guess you could try reverting (in order):
>>>  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/net/wireless/ath/ath10k?id=0bcbbe679b66fee1b56def5cb30bfb4f616b1127
>>>  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/net/wireless/ath/ath10k?id=76d870ed09ab34154454b1adb823ae75f173c2d2
>>>  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/net/wireless/ath/ath10k?id=77258d409ce45890104e3da11d0261402c49aee1
>>>
>>> I'm shooting blind here though.
>>>
>>>> [1] https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/drivers/net/wireless/ath/ath10k/pci.c?id=11a002efbaa7fbd9f6e616695ab42aa9f1caf060
>>>
>>> Michał
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