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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-11-17 03:28:53 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-11-21 22:48:10 +0100 |
| commit | 08b98d3291652bdcd1029a059e39fbcae5ad93e2 (patch) | |
| tree | 2a95ceced1563a46095f3c2e7c593dfccba606df /drivers/acpi/sleep.c | |
| parent | PM / sleep: System sleep state selection interface rework (diff) | |
| download | linux-08b98d3291652bdcd1029a059e39fbcae5ad93e2.tar.xz linux-08b98d3291652bdcd1029a059e39fbcae5ad93e2.zip | |
PM / sleep / ACPI: Use the ACPI_FADT_LOW_POWER_S0 flag
Modify the ACPI system sleep support setup code to select
suspend-to-idle as the default system sleep state if the
ACPI_FADT_LOW_POWER_S0 flag is set in the FADT and the
default sleep state was not selected from the kernel command
line.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mario Limonciello <mario.limonciello@dell.com>
Diffstat (limited to 'drivers/acpi/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index deb0ff78eba8..ce1855fd584b 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -691,6 +691,14 @@ static void acpi_sleep_suspend_setup(void) if (acpi_sleep_state_supported(i)) sleep_states[i] = 1; + /* + * Use suspend-to-idle by default if ACPI_FADT_LOW_POWER_S0 is set and + * the default suspend mode was not selected from the command line. + */ + if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0 && + mem_sleep_default > PM_SUSPEND_MEM) + mem_sleep_default = PM_SUSPEND_FREEZE; + suspend_set_ops(old_suspend_ordering ? &acpi_suspend_ops_old : &acpi_suspend_ops); freeze_set_ops(&acpi_freeze_ops); |