From: Hans de Goede hdegoede@redhat.com
[ Upstream commit f2eae1888cf22590c38764b8fa3c989c0283870e ]
The Yoga 11e series has 2 accelerometers described by a BOSC0200 ACPI node. This setup relies on a Windows service which reads both accelerometers and then calculates the angle between the 2 halves to determine laptop / tent / tablet mode and then reports the calculated mode back to the EC by calling special ACPI methods on the BOSC0200 node.
The bmc150 iio driver does not support this (it involves double calculations requiring sqrt and arccos so this really needs to be done in userspace), as a result of this on the Yoga 11e the thinkpad_acpi code always reports SW_TABLET_MODE=0, starting with GNOME 3.38 reporting SW_TABLET_MODE=0 causes GNOME to:
1. Not show the onscreen keyboard when a text-input field is focussed with the touchscreen. 2. Disable accelerometer based auto display-rotation.
This makes sense when in laptop-mode but not when in tablet-mode. But since for the Yoga 11e the thinkpad_acpi code always reports SW_TABLET_MODE=0, GNOME does not know when the device is in tablet-mode.
Stop reporting the broken (always 0) SW_TABLET_MODE on Yoga 11e models to fix this.
Note there are plans for userspace to support 360 degree hinges style 2-in-1s with 2 accelerometers and figure out the mode by itself, see: https://gitlab.freedesktop.org/hadess/iio-sensor-proxy/-/issues/216
Signed-off-by: Hans de Goede hdegoede@redhat.com Link: https://lore.kernel.org/r/20201106140130.46820-1-hdegoede@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/thinkpad_acpi.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 4a5bb86d341ee..cd7e782791c71 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -3214,7 +3214,14 @@ static int hotkey_init_tablet_mode(void)
in_tablet_mode = hotkey_gmms_get_tablet_mode(res, &has_tablet_mode); - if (has_tablet_mode) + /* + * The Yoga 11e series has 2 accelerometers described by a + * BOSC0200 ACPI node. This setup relies on a Windows service + * which calls special ACPI methods on this node to report + * the laptop/tent/tablet mode to the EC. The bmc150 iio driver + * does not support this, so skip the hotkey on these models. + */ + if (has_tablet_mode && !acpi_dev_present("BOSC0200", "1", -1)) tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; type = "GMMS"; } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {