Ayaneo Air 1S fan control

[xerootg]

Hey! The ayaneo air 1s that I have does not allow manual fan speed settings with oxp-sensors. I built nfbc and used ec_probe to poke at the registers that HandheldCompanion has documented and things work, so. It seems there's a bug in the oxp-sensors kernel module.

for example:

[gamer@chimeraos ~]$ echo 1 | sudo tee /sys/devices/platform/oxp-platform/hwmon/hwmon6/pwm1_enable
1
[gamer@chimeraos ~]$ echo 99 | sudo tee /sys/devices/platform/oxp-platform/hwmon/hwmon6/pwm1
99
tee: /sys/devices/platform/oxp-platform/hwmon/hwmon6/pwm1: Operation not supported

the fan spins up but is frozen at something around 2k rpm and no matter what I try to set pwm1 to fails.

vs

[gamer@chimeraos ~]$ sudo nbfc/pkg/nbfc-linux-git/usr/bin/ec_probe write 0x4a 0x01 #enable manual control
[gamer@chimeraos ~]$ sudo nbfc/pkg/nbfc-linux-git/usr/bin/ec_probe write 0x4b 0x64 #set to 100

I've looked at the driver and its quite intimidating. It seems like someone assumed the 1s worked the same as a pile of other devices and I'm not sure where to start. Is anyone familiar with that driver that would be interested in collaborating on a patch? I'm going to try and get fancontrol working for now.

[pastaq]

Can you link here the registers for the air 1S?

[xerootg]

Sure! By registers, you want me to dump the EC memory at runtime? Or is there something else?

[xerootg]

Or these? https://github.com/Valkirie/HandheldCompanion/blob/main/HandheldCompanion/Devices/AYANEO/AYANEODeviceCEc.cs

(Inheritance: Ayaneo air 1s -> ayaneo air -> CEc)

Mainline driver: https://github.com/torvalds/linux/blob/master/drivers/hwmon/oxp-sensors.c

[xerootg]

Ok, so I went on a hunt. I updated my EC and my bios to the latest, didn't fix things. I then compared the mainline kernel oxp_sensors.c to the 6.9/chimeraos version, and there's quite a few differences, but the biggest thing - air 1s doesn't have a pwm set: mainline vs chimera's 6.9 fork - alas, 6.10 through 6.12 have support. chimera's 9.10 fork chimera's 9.12 fork

I guess that means this is a solved case of all releases of v46 don't support the 1s fan. ☹️

[xerootg]

ok, so I tried unstable, 6.10 kernel, lacks the ability to enable manual fan control, but can disable manual fan control. :(

I tested, manually set the bit for manual control, and I can use oxp-sensors for setting pwm1, so its something.

[pastaq]

What register and value did you use to enable it?

[xerootg]

same as before [gamer@chimeraos ~]$ sudo nbfc/pkg/nbfc-linux-git/usr/bin/ec_probe write 0x4a 0x01 #enable manual control

[pastaq]

Odd that the driver isn't working, that's the same value.

[pastaq]

Nvm, I see the issue. Older patch on our 6.10 kernel with a missing entry. Easy fix.

[xerootg]

ok, but there's bugs in both drivers. the older kernel can enable manual control but can't set the pwm value, and the new driver cant enable manual but can set the pwm value. ideally 6.10 would be able to both set the pwm value as well as enable manual control.