From: Mario Limonciello mario.limonciello@amd.com
[ Upstream commit b988685388effd648150aab272533f833a2a70f0 ]
When AC adapter is unplugged or plugged in EC wakes from HW sleep but APU doesn't enter back into HW sleep.
The reason this happens is that, when the APU exits HW sleep, the power rails controlled by the EC will power up the TCON. The TCON has a GPIO that will be toggled at this time. The GPIO is not marked as a wakeup source, but the GPIO controller still has an unserviced interrupt. Unserviced interrupts will block entering HW sleep again. Clearing the GPIO doesn't help as the TCON continues to assert it until it's been initialized by i2c-hid.
Fixing this would require TCON F/W changes and it's already broken in the wild on production hardware.
To avoid triggering this issue add a quirk to avoid letting EC wake up system at all. The power button still works properly on this system.
Reported-by: Antheas Kapenekakis lkml@antheas.dev Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3929 Link: https://github.com/bazzite-org/patchwork/commit/95b93b2852718ee1e808c72e6b18... Co-developed-by: Antheas Kapenekakis lkml@antheas.dev Signed-off-by: Antheas Kapenekakis lkml@antheas.dev Signed-off-by: Mario Limonciello mario.limonciello@amd.com Link: https://patch.msgid.link/20250401133858.1892077-1-superm1@kernel.org [ rjw: Changelog edits ] Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/ec.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 63803091f8b1e..5776987390907 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -2260,6 +2260,34 @@ static const struct dmi_system_id acpi_ec_no_wakeup[] = { DMI_MATCH(DMI_PRODUCT_FAMILY, "103C_5336AN HP ZHAN 66 Pro"), }, }, + /* + * Lenovo Legion Go S; touchscreen blocks HW sleep when woken up from EC + * https://gitlab.freedesktop.org/drm/amd/-/issues/3929 + */ + { + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "83L3"), + } + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "83N6"), + } + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "83Q2"), + } + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "83Q3"), + } + }, { }, };