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ACPI: PM: s2idle: Add acpi.sleep_no_lps0 module parameter 

Add a module parameter to prevent the ACPI LPS0 _DSM functions
from being invoked (if need be) and rework the suspend-to-idle
blacklist entries in acpisleep_dmi_table[] to make them simply
prevent suspend-to-idle from being used by default on the systems
in question (which really is the original purpose of those entries).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
This commit is contained in:
Rafael J. Wysocki 2019-07-31 11:05:25 +02:00
parent 2e2c2fdc53
commit 068b47d098
1 changed files with 15 additions and 16 deletions
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31
drivers/acpi/sleep.c
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@ -89,6 +89,10 @@ bool acpi_sleep_state_supported(u8 sleep_state)
}
#ifdef CONFIG_ACPI_SLEEP
static bool sleep_no_lps0 __read_mostly;
module_param(sleep_no_lps0, bool, 0644);
MODULE_PARM_DESC(sleep_no_lps0, "Do not use the special LPS0 device interface");
static u32 acpi_target_sleep_state = ACPI_STATE_S0;
u32 acpi_target_system_state(void)
@ -158,11 +162,11 @@ static int __init init_nvs_nosave(const struct dmi_system_id *d)
return 0;
}
static bool acpi_sleep_no_lps0;
static bool acpi_sleep_default_s3;
static int __init init_no_lps0(const struct dmi_system_id *d)
static int __init init_default_s3(const struct dmi_system_id *d)
{
acpi_sleep_no_lps0 = true;
acpi_sleep_default_s3 = true;
return 0;
}
@ -363,7 +367,7 @@ static const struct dmi_system_id acpisleep_dmi_table[] __initconst = {
* S0 Idle firmware interface.
*/
{
.callback = init_no_lps0,
.callback = init_default_s3,
.ident = "Dell XPS13 9360",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
@ -376,7 +380,7 @@ static const struct dmi_system_id acpisleep_dmi_table[] __initconst = {
* https://bugzilla.kernel.org/show_bug.cgi?id=199057).
*/
{
.callback = init_no_lps0,
.callback = init_default_s3,
.ident = "ThinkPad X1 Tablet(2016)",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
@ -524,8 +528,9 @@ static void acpi_pm_end(void)
acpi_sleep_tts_switch(acpi_target_sleep_state);
}
#else /* !CONFIG_ACPI_SLEEP */
#define sleep_no_lps0 (1)
#define acpi_target_sleep_state ACPI_STATE_S0
#define acpi_sleep_no_lps0 (false)
#define acpi_sleep_default_s3 (1)
static inline void acpi_sleep_dmi_check(void) {}
#endif /* CONFIG_ACPI_SLEEP */
@ -904,12 +909,6 @@ static int lps0_device_attach(struct acpi_device *adev,
if (lps0_device_handle)
return 0;
if (acpi_sleep_no_lps0) {
acpi_handle_info(adev->handle,
"Low Power S0 Idle interface disabled\n");
return 0;
}
if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))
return 0;
@ -937,7 +936,7 @@ static int lps0_device_attach(struct acpi_device *adev,
* Use suspend-to-idle by default if the default suspend mode was not
* set from the command line.
*/
if (mem_sleep_default > PM_SUSPEND_MEM)
if (mem_sleep_default > PM_SUSPEND_MEM && !acpi_sleep_default_s3)
mem_sleep_current = PM_SUSPEND_TO_IDLE;
return 0;
@ -957,7 +956,7 @@ static int acpi_s2idle_begin(void)
static int acpi_s2idle_prepare(void)
{
if (lps0_device_handle) {
if (lps0_device_handle && !sleep_no_lps0) {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
}
@ -977,7 +976,7 @@ static int acpi_s2idle_prepare(void)
static void acpi_s2idle_wake(void)
{
if (lps0_device_handle && pm_debug_messages_on)
if (lps0_device_handle && !sleep_no_lps0 && pm_debug_messages_on)
lpi_check_constraints();
/*
@ -1025,7 +1024,7 @@ static void acpi_s2idle_restore(void)
if (acpi_sci_irq_valid())
disable_irq_wake(acpi_sci_irq);
if (lps0_device_handle) {
if (lps0_device_handle && !sleep_no_lps0) {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON);
}