diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-01-11 02:13:58 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-01-11 18:54:31 +0100 |
| commit | 29a5a6d7082427371519ae1e186d9e35612801fb (patch) | |
| tree | 7ae5db9a861e0f429893cd5776d6457993739314 /drivers/acpi/sleep.c | |
| parent | 57044031b0cb11325e1034394a4721484f9dc9fe (diff) | |
| download | linux-29a5a6d7082427371519ae1e186d9e35612801fb.tar.gz | |
ACPI / PM: Use Low Power S0 Idle on more systems
Some systems don't support the ACPI_LPS0_ENTRY and ACPI_LPS0_EXIT functions in their Low Power S0 Idle _DSM, but still expect EC events to be processed in the suspend-to-idle state for power button wakeup (among other things) to work. Surface Pro3 turns out to be one of them. Fortunately, it still provides Low Power S0 Idle _DSM with the screen on/off functions supported, so modify the ACPI suspend-to-idle to use the Low Power S0 Idle code path for all systems supporting the ACPI_LPS0_ENTRY and ACPI_LPS0_EXIT or the ACPI_LPS0_SCREEN_OFF and ACPI_LPS0_SCREEN_ON functions in their Low Power S0 Idle _DSM. Potentially, that will cause more systems to use suspend-to-idle by default, so some future corrections may be necessary if it leads to issues, but let it remain more straightforward for now. Link: https://bugzilla.kernel.org/show_bug.cgi?id=198389#add_comment Reported-by: Valentin Manea <valy@mrs.ro> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Valentin Manea <valy@mrs.ro>
Diffstat (limited to 'drivers/acpi/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 15cd862a87c2..46cde0912762 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -707,7 +707,8 @@ static const struct acpi_device_id lps0_device_ids[] = { #define ACPI_LPS0_ENTRY 5 #define ACPI_LPS0_EXIT 6 -#define ACPI_S2IDLE_FUNC_MASK ((1 << ACPI_LPS0_ENTRY) | (1 << ACPI_LPS0_EXIT)) +#define ACPI_LPS0_SCREEN_MASK ((1 << ACPI_LPS0_SCREEN_OFF) | (1 << ACPI_LPS0_SCREEN_ON)) +#define ACPI_LPS0_PLATFORM_MASK ((1 << ACPI_LPS0_ENTRY) | (1 << ACPI_LPS0_EXIT)) static acpi_handle lps0_device_handle; static guid_t lps0_dsm_guid; @@ -910,7 +911,8 @@ static int lps0_device_attach(struct acpi_device *adev, if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) { char bitmask = *(char *)out_obj->buffer.pointer; - if ((bitmask & ACPI_S2IDLE_FUNC_MASK) == ACPI_S2IDLE_FUNC_MASK) { + if ((bitmask & ACPI_LPS0_PLATFORM_MASK) == ACPI_LPS0_PLATFORM_MASK || + (bitmask & ACPI_LPS0_SCREEN_MASK) == ACPI_LPS0_SCREEN_MASK) { lps0_dsm_func_mask = bitmask; lps0_device_handle = adev->handle; /* |