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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-06-18 14:17:16 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-06-18 13:32:37 +0200 |
| commit | 8195a655e5ce09550aff81b2573d9b015d520cb9 (patch) | |
| tree | 6c7b7e4f5744b0b5246f06441ee2abe110253492 /drivers/acpi/ec.c | |
| parent | ce397d215ccd07b8ae3f71db689aedb85d56ab40 (diff) | |
| download | linux-8195a655e5ce09550aff81b2573d9b015d520cb9.tar.gz linux-8195a655e5ce09550aff81b2573d9b015d520cb9.tar.bz2 linux-8195a655e5ce09550aff81b2573d9b015d520cb9.zip | |
ACPI / EC: Use ec_no_wakeup on Thinkpad X1 Carbon 6th
On this system EC interrupt triggers constantly kicking devices out of
low power states and thus blocking power management. The system also has
a PCIe root port hosting Alpine Ridge Thunderbolt controller and it
never gets a chance to go to D3cold because of this.
Since the power button works the same regardless if EC interrupt is
enabled or not during s2idle, add a quirk for this machine that sets
ec_no_wakeup=true preventing spurious wakeups.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/ec.c')
| -rw-r--r-- | drivers/acpi/ec.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index bb94cf0731fe..442a9e24f439 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -2037,6 +2037,17 @@ static inline void acpi_ec_query_exit(void) } } +static const struct dmi_system_id acpi_ec_no_wakeup[] = { + { + .ident = "Thinkpad X1 Carbon 6th", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "20KGS3JF01"), + }, + }, + { }, +}; + int __init acpi_ec_init(void) { int result; @@ -2047,6 +2058,15 @@ int __init acpi_ec_init(void) if (result) return result; + /* + * Disable EC wakeup on following systems to prevent periodic + * wakeup from EC GPE. + */ + if (dmi_check_system(acpi_ec_no_wakeup)) { + ec_no_wakeup = true; + pr_debug("Disabling EC wakeup on suspend-to-idle\n"); + } + /* Drivers must be started after acpi_ec_query_init() */ dsdt_fail = acpi_bus_register_driver(&acpi_ec_driver); /* |