diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2022-02-23 14:31:52 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2022-03-02 11:43:45 +0100 |
| commit | bf8fd1a9736eaff5a5b823415e5a0d165a42e5d6 (patch) | |
| tree | 7c1e0e1cb9678f7ed787a86f6de644f846b249de /drivers/platform/x86/x86-android-tablets.c | |
| parent | 67dfc2b441b4b724acb74361e9e2e23506721e4f (diff) | |
| download | linux-bf8fd1a9736eaff5a5b823415e5a0d165a42e5d6.tar.bz2 | |
platform/x86: x86-android-tablets: Workaround Lenovo Yoga Tablet 2 830/1050 poweroff hang
These tablets' DSDT does not set acpi_gbl_reduced_hardware, so
acpi_power_off gets used as pm_power_off handler. Not setting
acpi_gbl_reduced_hardware may very well be correct for these tablets,
but acpi_power_off is broken on them.
Using acpi_power_off causes "poweroff" to hang hard. Requiring pressing
the powerbutton for 30 seconds *twice* followed by a normal 3 second
press to recover.
Avoid this by overriding the global pm_power_off handler to do
an EFI poweroff, which does work, instead.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220223133153.730337-5-hdegoede@redhat.com
Diffstat (limited to 'drivers/platform/x86/x86-android-tablets.c')
| -rw-r--r-- | drivers/platform/x86/x86-android-tablets.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c index 89972723f546..c3d2b30dbe26 100644 --- a/drivers/platform/x86/x86-android-tablets.c +++ b/drivers/platform/x86/x86-android-tablets.c @@ -12,6 +12,7 @@ #include <linux/acpi.h> #include <linux/dmi.h> +#include <linux/efi.h> #include <linux/gpio_keys.h> #include <linux/gpio/consumer.h> #include <linux/gpio/driver.h> @@ -24,6 +25,7 @@ #include <linux/mod_devicetable.h> #include <linux/platform_data/lp855x.h> #include <linux/platform_device.h> +#include <linux/pm.h> #include <linux/power/bq24190_charger.h> #include <linux/rmi.h> #include <linux/serdev.h> @@ -817,6 +819,7 @@ static struct x86_dev_info lenovo_yoga_tab2_830_1050_info __initdata = { .modules = bq24190_modules, .invalid_aei_gpiochip = "INT33FC:02", .init = lenovo_yoga_tab2_830_1050_init, + .exit = lenovo_yoga_tab2_830_1050_exit, }; /* @@ -863,6 +866,18 @@ static int __init lenovo_yoga_tab2_830_1050_init_display(void) return 0; } +/* + * These tablet's DSDT does not set acpi_gbl_reduced_hardware, so acpi_power_off + * gets used as pm_power_off handler. This causes "poweroff" on these tablets + * to hang hard. Requiring pressing the powerbutton for 30 seconds *twice* + * followed by a normal 3 second press to recover. Avoid this by doing an EFI + * poweroff instead. + */ +static void lenovo_yoga_tab2_830_1050_power_off(void) +{ + efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL); +} + static int __init lenovo_yoga_tab2_830_1050_init(void) { int ret; @@ -871,9 +886,15 @@ static int __init lenovo_yoga_tab2_830_1050_init(void) if (ret) return ret; + pm_power_off = lenovo_yoga_tab2_830_1050_power_off; return 0; } +static void lenovo_yoga_tab2_830_1050_exit(void) +{ + pm_power_off = NULL; /* Just turn poweroff into halt on module unload */ +} + /* Nextbook Ares 8 tablets have an Android factory img with everything hardcoded */ static const char * const nextbook_ares8_accel_mount_matrix[] = { "0", "-1", "0", |