Re: Display got wrong rotation after hid_sensor_accel_3d is loaded

[Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>]

Hi Kao,

Is this device sold with Windows?
Can you send full report descriptor (You can get from
/sys/kernel/debug/hid)?

Thanks,
Srinivas

On Fri, 2019-12-27 at 10:30 +0800, AceLan Kao wrote:
> Hi Bastien,
> 
> Thanks for your suggestion.
> I just tried to add the following line into
> /lib/udev/hwdb.d/60-sensor.hwdb and got the correct screen rotation.
> But the cursor is still un-rotated, the cursor is drawn upside down,
> and its coordinates are inverted.
> 
> #########################################
> # STMicro
> #########################################
> sensor:modalias:platform:platform:HID-SENSOR-200073
>  ACCEL_MOUNT_MATRIX=-1, 0, 0; 0, -1, 0; 0, 0, 1
> 
> It looks like we should introduce a quirk into hid_sensor_accel_3d
> driver.
> There are 3 different scale variables in hid_sensor_accel_3d, but I
> don't see any of them would work the way I want.
> Do you mean to introduce new scale variables?
> 
>    drivers/iio/accel/hid-sensor-accel-3d.c:34:     int
> scale_pre_decml;
>    drivers/iio/accel/hid-sensor-accel-3d.c:35:     int
> scale_post_decml;
>    drivers/iio/accel/hid-sensor-accel-3d.c:36:     int
> scale_precision;
> 
> Bastien Nocera <hadess@hadess.net> 於 2019年12月26日 週四 下午11:03寫道：
> > 
> > On Thu, 2019-12-26 at 17:22 +0800, AceLan Kao wrote:
> > > Hi all,
> > > 
> > > I'm working on a new platform which comes with an accelerator
> > > meter.
> > > It's a STMicroelectronics LSM6DS3US accelerator meter, it doesn't
> > > use
> > > st_sensors driver, but hid_sensor_accel_3d.
> > > After hid_sensor_accel_3d is loaded, the display becomes upside
> > > down,
> > > so I tried to add some code to make it become normal.(ACCEL_X
> > > should
> > > have the same modification)
> > > 
> > > I don't know how to fix this in a correct way, please give me
> > > some
> > > hints.
> > 
> > This needs to be done as a quirk, either by applying a quirk for
> > the
> > HID descriptors (which should have a definition of the scale, which
> > would be negative for this device), or in user-space in systemd's
> > hwdb
> > database, which your user-space consumers need to take care of:
> > 
https://github.com/systemd/systemd/blob/master/hwdb.d/60-sensor.hwdb
> > 
> > Cheers
> >