[PATCH 1/2] wifi: ath11k: supports 2 station interfaces

[Carl Huang]

On 2024/5/10 21:57, Kalle Valo wrote:
> Carl Huang <quic_cjhuang at quicinc.com> writes:
> 
>> On 2024/5/10 18:18, Kalle Valo wrote:
>>> "Luca Weiss" <luca.weiss at fairphone.com> writes:
>>>
>>>> On Fri Jul 14, 2023 at 4:38 AM CEST, Carl Huang wrote:
>>>>> Add hardware parameter support_dual_stations to indicate
>>>>> whether 2 station interfaces are supported. For chips which
>>>>> support this feature, limit total number of AP interface and
>>>>> mesh point to 1. The max interfaces are 3 for such chips.
>>>>>
>>>>> The chips affected are:
>>>>>    QCA6390 hw2.0
>>>>>    WCN6855 hw2.0
>>>>>    WCN6855 hw2.1
>>>>> Other chips are not affected.
>>>>>
>>>>> For affected chips, remove radar_detect_widths because now
>>>>> num_different_channels is set to 2. radar_detect_widths can
>>>>> be set only when num_different_channels is 1. See mac80211
>>>>> function wiphy_verify_combinations for details.
>>>>>
>>>>> Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3
>>>>
>>>> Hi Carl,
>>>>
>>>> Unfortunately this commit breaks wifi on a QCM6490 smartphone
>>>> (qcm6490-fairphone-fp5) and makes the board crash.
>>>>
>>>> Reverting this commit (plus for conflict resolution 5dc9d1a55e95 ("wifi:
>>>> ath11k: add support for QCA2066") and 24395ec11707 ("wifi: ath11k:
>>>> provide address list if chip supports 2 stations")) makes wifi work
>>>> again.
>>> Thanks for the report. So the broken commit is:
>>> f019f4dff2e4 wifi: ath11k: support 2 station interfaces
>>> This went into v6.9-rc1 so I'm guessing that WCN6750 support will be
>>> fully broken in v6.9? Not good. And most likely Linus will release v6.9
>>> on Sunday so it's too late to get a fix included in the final release.
>>> Carl, can you fix this ASAP? Or should we just revert the broken
>>> commits?
>>> Adding this to our regression tracking:
>>> #regzbot introduced: f019f4dff2e4 ^
>>> #regzbot title: ath11k: WCN6750 firmware crashes during initialisation
>>
>> Kalle, looks we're not able to fix it before Sunday as I don't have
>> WCN6750 setup to verify the fix.
> 
> We are so late in the cycle that we would have to send the fix directly
> to Linus and ask him to apply the fix before he tags the release. I
> prefer that we are on the safe side here and send the fix to v6.10-rc1
> via the usual route (the wireless tree). We get more testing time that
> way.
> 
No problem, Kalle.

I think more tags are needed like Tested-on WCN6750 and Tested-by Luca.

I'll send out the formal patch next week.

>> The fix could be to define a dedicated function
>> ath11k_init_wmi_config_wcn6750() for WCN6750. I'll send the patch out
>> so others like Luca can have a try.
> 
> Thanks for the quick patches!
>