On Wed, Jul 24, 2024 at 7:45 PM Barnabás Pőcze <pobrn@xxxxxxxxxxxxxx> wrote:
>
> 2024. július 24., szerda 4:39 keltezéssel, Liam Howlett <howlett@xxxxxxxxx> írta:
>
> > On Tue, Jul 23, 2024 at 10:19 PM Armin Wolf <W_Armin@xxxxxx> wrote:
> > >
> > > Am 24.07.24 um 01:35 schrieb Liam Howlett:
> > >
> > > > Just to follow this up, it's not (just?) an acpi issue, the driver
> > > > isn't doing what it needs to do - if there is a driver for the
> > > > hardware at all. I'm still looking into what is necessary.
> > > >
> > > > I did write the value to the CMMD variable, but calling the _Q2E
> > > > function does not cause the ^HKEY.MHKQ (0x60C0) to be sent. If I
> > > > understand this correctly, that's what should happen.
> > > >
> > > > Thanks,
> > > > Liam
> > > >
> > > Hi,
> > >
> > > can you share the output of "acpidump"? This will make it easier to figure
> > > out what the ACPI code is doing.
> >
> > Sure, see attached (I hope gmail doesn't mess this up on me..)
> >
> > What makes me think it's not just an acpi issue is that the iio device
> > doesn't seem to have an indicator for the rotation of hinge angle of
> > the screen:
> > ls /sys/bus/iio/devices/iio\:device0
> > buffer buffer0 current_timestamp_clock dev in_accel_hysteresis
> > in_accel_offset in_accel_sampling_frequency in_accel_scale
> > in_accel_x_raw in_accel_y_raw in_accel_z_raw name power
> > scan_elements subsystem trigger uevent
>
> Hi
>
>
> I am not sure if this will be useful but I have a Lenovo YOGA 520-14IKB. And on that
> machine the hinge rotation angle seems to be reported via a custom HID sensor based
> on reverse engineering and experimentation.
>
> You might want to check under /sys/bus/platform/drivers/hid_sensor_custom/. In my
> case there is one.
>
> $ pwd
> /sys/bus/platform/drivers/hid_sensor_custom/HID-SENSOR-2000e1.3.auto
> $ cat feature-b-200306/feature-b-200306-value
> 76 0 101 0 110 0 111 0 118 0 111 0 32 0 89 0 111 0 103 0 97 0
>
I believe the Lenovo YOGA uses another driver for a sensor the
Thinkpad Yogas don't have.
$ ls /sys/bus/platform/drivers/
ac amd_pmc byt_crystal_cove_pmic
cht_crystal_cove_pmic clk-pmc-atom efi-framebuffer i8042
pcspkr soc-audio thinkpad_hwmon
acpi-ged amd_sdw_manager byt_gpio
cht_dollar_cove_ti_pmic coreboot_table geminilake-pinctrl
icelake-pinctrl reg-dummy sp5100-tco
tigerlake-pinctrl
acpi-wmi axp288_pmic_acpi cannonlake-pinctrl
cht_whiskey_cove_pmic crystal_cove_pwm gpio-clk
intel_rapl_msr serial8250 sunrisepoint-pinctrl tpm_tis
alarmtimer broxton-pinctrl cedarfork-pinctrl clk-fch
denverton-pinctrl hid_sensor_accel_3d lewisburg-pinctrl
simple-framebuffer syscon ucsi_acpi
amd_gpio bxt_whiskey_cove_pmic cherryview-pinctrl
clk-lpss-atom dw-apb-uart i2c_designware
parport_pc snd-soc-dummy thinkpad_acpi
vesa-framebuffer
So the only sensor seems to be the hid_sensor_accel_3d, and it has no
hinge properties in my case. Although, it might be one of the other
items here so I will explore this area. Thanks!
> The above feature (property-sensor-model) spells out "Lenovo Yoga" in UTF-16.
> As far as I remember this is how the windows service finds the correct sensor.
> Under the various inputs, the sensor seems to report the hinge rotation angle,
> as well as the angles between the keyboard and screen, and the ground level.
>
> If the situation is similar in your case, then there is already infrastructure
> to expose the angles to user space in iio sensors. See hid-sensor-custom and
> hid-sensor-custom-intel-hinge.
No such lock, no hinge is returned with a find command in that directory.
Thanks,
Liam
...
