From: Hans de Goede <hdegoede@xxxxxxxxxx>
[ Upstream commit 1fac39fd0316b19c3e57a182524332332d1643ce ]
Commit de9647efeaa9 ("platform/x86: intel-vbtn: Only activate tablet mode
switch on 2-in-1's") added a DMI chassis-type check to avoid accidentally
reporting SW_TABLET_MODE = 1 to userspace on laptops.
Some devices with a detachable keyboard and using the intel-vbnt (INT33D6)
interface to report if they are in tablet mode (keyboard detached) or not,
report 32 / "Detachable" as chassis-type, e.g. the HP Pavilion X2 series.
Other devices with a detachable keyboard and using the intel-vbnt (INT33D6)
interface to report SW_TABLET_MODE, report 8 / "Portable" as chassis-type.
The Dell Venue 11 Pro 7130 is an example of this.
Extend the DMI chassis-type check to also accept Portables and Detachables
so that the intel-vbtn driver will report SW_TABLET_MODE on these devices.
Note the chassis-type check was originally added to avoid a false-positive
tablet-mode report on the Dell XPS 9360 laptop. To the best of my knowledge
that laptop is using a chassis-type of 9 / "Laptop", so after this commit
we still ignore the tablet-switch for that chassis-type.
Fixes: de9647efeaa9 ("platform/x86: intel-vbtn: Only activate tablet mode switch on 2-in-1's")
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Reviewed-by: Mario Limonciello <Mario.limonciello@xxxxxxxx>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/platform/x86/intel-vbtn.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c
index 500fae82e12c..4921fc15dc6c 100644
--- a/drivers/platform/x86/intel-vbtn.c
+++ b/drivers/platform/x86/intel-vbtn.c
@@ -158,12 +158,22 @@ static void detect_tablet_mode(struct platform_device *device)
static bool intel_vbtn_has_switches(acpi_handle handle)
{
const char *chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
+ unsigned long chassis_type_int;
unsigned long long vgbs;
acpi_status status;
- if (!(chassis_type && strcmp(chassis_type, "31") == 0))
+ if (kstrtoul(chassis_type, 10, &chassis_type_int))
return false;
+ switch (chassis_type_int) {
+ case 8: /* Portable */
+ case 31: /* Convertible */
+ case 32: /* Detachable */
+ break;
+ default:
+ return false;
+ }
+
status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs);
return ACPI_SUCCESS(status);
}
--
2.25.1
