09-16-2021, 08:19 PM
(09-13-2021, 11:57 AM)lgtrombetta Wrote: Well, after working on this app I've been trying to help with something similar in UT for the Pinephone. In UT there is an intermediate layer carrying the sensor logic called sensorfw (which comes from Sailfish OS), sitting between the kernel driver and the applications. This includes auto-calibration, which turned out to have a bug preventing it from working properly.
Thanks to some very knowledgeable people already working on improving the Pinephone sensors in UT, I was able to make a small contribution including a fix for auto-calibration. Here's the draft for an MR to the sensorfw library, in case anybody is interested:
https://github.com/ubports/sensorfw/pull/4
Now, I was actually thinking on bringing some of this auto-calibration logic to the Compass app, as it seems fairly simple. But of course it makes more sense to have it in a middle layer instead, like in UT. I am not familiar with the sensor stack in distros using Phosh and what the sensorfw equivalent would be. Also I am not an expert by any measure. However, if anybody else knows about this I'd be glad to jump in and try to help them with what I can.
Sadly, it seems that there will need to be some kind of duplication of what you've done with sensorfw somewhere in the iio-sensor-proxy stack to bring this functionality into this side of the stack. It's too bad that Linux can't be more unified to avoid all the duplicated effort with Ofono/ModemManager, Gtk/Qt, ...
It's good news that auto-calibration should be possible though. That will make things much simpler.