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authorHans de Goede <hdegoede@redhat.com>2020-05-15 20:39:16 +0200
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-06-01 12:27:25 +0300
commitcfae58ed681c5fe0185db843013ecc71cd265ebf (patch)
tree742f9120884310ad17e8ffdde1f963a283fdbc8e /drivers/platform
parent8fe63eb757ac6e661a384cc760792080bdc738dc (diff)
downloadlinux-cfae58ed681c5fe0185db843013ecc71cd265ebf.tar.bz2
platform/x86: intel-vbtn: Only blacklist SW_TABLET_MODE on the 9 / "Laptop" chasis-type
The HP Stream x360 11-p000nd no longer report SW_TABLET_MODE state / events with recent kernels. This model reports a chassis-type of 10 / "Notebook" which is not on the recently introduced chassis-type whitelist Commit de9647efeaa9 ("platform/x86: intel-vbtn: Only activate tablet mode switch on 2-in-1's") added a chassis-type whitelist and only listed 31 / "Convertible" as being capable of generating valid SW_TABLET_MOD events. Commit 1fac39fd0316 ("platform/x86: intel-vbtn: Also handle tablet-mode switch on "Detachable" and "Portable" chassis-types") extended the whitelist with chassis-types 8 / "Portable" and 32 / "Detachable". And now we need to exten the whitelist again with 10 / "Notebook"... The issue original fixed by the whitelist is really a ACPI DSDT bug on the Dell XPS 9360 where it has a VGBS which reports it is in tablet mode even though it is not a 2-in-1 at all, but a regular laptop. So since this is a workaround for a DSDT issue on that specific model, instead of extending the whitelist over and over again, lets switch to a blacklist and only blacklist the chassis-type of the model for which the chassis-type check was added. Note this also fixes the current version of the code no longer checking if dmi_get_system_info(DMI_CHASSIS_TYPE) returns NULL. Fixes: 1fac39fd0316 ("platform/x86: intel-vbtn: Also handle tablet-mode switch on "Detachable" and "Portable" chassis-types") Cc: Mario Limonciello <mario.limonciello@dell.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Mario Limonciello <Mario.limonciello@dell.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/intel-vbtn.c19
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c
index ef92c1c3adbd..0487b606a274 100644
--- a/drivers/platform/x86/intel-vbtn.c
+++ b/drivers/platform/x86/intel-vbtn.c
@@ -170,21 +170,18 @@ static bool intel_vbtn_has_buttons(acpi_handle handle)
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 (kstrtoul(chassis_type, 10, &chassis_type_int))
- return false;
-
- switch (chassis_type_int) {
- case 8: /* Portable */
- case 31: /* Convertible */
- case 32: /* Detachable */
- break;
- default:
+ /*
+ * Some normal laptops have a VGBS method despite being non-convertible
+ * and their VGBS method always returns 0, causing detect_tablet_mode()
+ * to report SW_TABLET_MODE=1 to userspace, which causes issues.
+ * These laptops have a DMI chassis_type of 9 ("Laptop"), do not report
+ * switches on any devices with a DMI chassis_type of 9.
+ */
+ if (chassis_type && strcmp(chassis_type, "9") == 0)
return false;
- }
status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs);
return ACPI_SUCCESS(status);