[PATCH 1/1] wifi: mt76: mt7996: fix mixed FEM check of mt7996 chipset

[Bjørn Mork]

Chukun Pan <amadeus at jmu.edu.cn> writes:

>> The problem is that the patch breaks the other device variant, which
>> used to work before.  If we assume the eeprom data from Zyxel is
>> correct, then this variant is iFEM.
>
> Do you have the specific model name and what the RF chips are?
> The eeprom seems to be fine.

Device with iFEM+eFEM+eFEM, working with your patch:
Zyxel EE4600-00

Readouts from the ADIE_ID registers:

root at ee4600:~# echo 0x0f00002c >/sys/kernel/debug/ieee80211/phy0/mt76/regidx
root at ee4600:~# grep . /sys/kernel/debug/ieee80211/phy0/mt76/rf_regval 
0x79758a02
root at ee4600:~# echo 0x1f00002c >/sys/kernel/debug/ieee80211/phy0/mt76/regidx
root at ee4600:~# grep . /sys/kernel/debug/ieee80211/phy0/mt76/rf_regval 
0x79778a10
root at ee4600:~# echo 0x2f00002c >/sys/kernel/debug/ieee80211/phy0/mt76/regidx
root at ee4600:~# grep . /sys/kernel/debug/ieee80211/phy0/mt76/rf_regval 
0x79778a10

Device with iFEM+iFEM+iFEM, working before and breaking with your patch:
Zyxel WE4600-01

Readouts from the ADIE_ID registers:

root at we4600:~# echo 0x0f00002c >/sys/kernel/debug/ieee80211/phy0/mt76/regidx
root at we4600:~# grep . /sys/kernel/debug/ieee80211/phy0/mt76/rf_regval
0x79758a02
root at we4600:~# echo 0x1f00002c >/sys/kernel/debug/ieee80211/phy0/mt76/regidx
root at we4600:~# grep . /sys/kernel/debug/ieee80211/phy0/mt76/rf_regval
0x79778a11
root at we4600:~# echo 0x2f00002c >/sys/kernel/debug/ieee80211/phy0/mt76/regidx
root at we4600:~# grep . /sys/kernel/debug/ieee80211/phy0/mt76/rf_regval
0x79778a11


I don't know exactly what chips these are.  I have no specs or
datasheets and I haven't removed the heatsink and shielding




Bjørn