aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/sleep.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/sleep.c')
-rw-r--r--drivers/acpi/sleep.c165
1 files changed, 88 insertions, 77 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index f0fe7c15d657..9fa77d72ef27 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -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 */
@@ -691,7 +696,6 @@ static const struct platform_suspend_ops acpi_suspend_ops_old = {
.recover = acpi_pm_finish,
};
-static bool s2idle_in_progress;
static bool s2idle_wakeup;
/*
@@ -904,42 +908,43 @@ 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;
guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid);
/* Check if the _DSM is present and as expected. */
out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL);
- if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) {
- char bitmask = *(char *)out_obj->buffer.pointer;
-
- lps0_dsm_func_mask = bitmask;
- lps0_device_handle = adev->handle;
- /*
- * 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)
- mem_sleep_current = PM_SUSPEND_TO_IDLE;
-
- acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",
- bitmask);
-
- acpi_ec_mark_gpe_for_wake();
- } else {
+ if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER) {
acpi_handle_debug(adev->handle,
"_DSM function 0 evaluation failed\n");
+ return 0;
}
+
+ lps0_dsm_func_mask = *(char *)out_obj->buffer.pointer;
+
ACPI_FREE(out_obj);
+ acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",
+ lps0_dsm_func_mask);
+
+ lps0_device_handle = adev->handle;
+
lpi_device_get_constraints();
+ /*
+ * 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 && !acpi_sleep_default_s3)
+ mem_sleep_current = PM_SUSPEND_TO_IDLE;
+
+ /*
+ * Some LPS0 systems, like ASUS Zenbook UX430UNR/i7-8550U, require the
+ * EC GPE to be enabled while suspended for certain wakeup devices to
+ * work, so mark it as wakeup-capable.
+ */
+ acpi_ec_mark_gpe_for_wake();
+
return 0;
}
@@ -951,98 +956,110 @@ static struct acpi_scan_handler lps0_handler = {
static int acpi_s2idle_begin(void)
{
acpi_scan_lock_acquire();
- s2idle_in_progress = true;
return 0;
}
static int acpi_s2idle_prepare(void)
{
- if (lps0_device_handle) {
- acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
- acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
-
+ if (acpi_sci_irq_valid()) {
+ enable_irq_wake(acpi_sci_irq);
acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE);
}
- if (acpi_sci_irq_valid())
- enable_irq_wake(acpi_sci_irq);
-
acpi_enable_wakeup_devices(ACPI_STATE_S0);
/* Change the configuration of GPEs to avoid spurious wakeup. */
acpi_enable_all_wakeup_gpes();
acpi_os_wait_events_complete();
+
+ s2idle_wakeup = true;
return 0;
}
-static void acpi_s2idle_wake(void)
+static int acpi_s2idle_prepare_late(void)
{
- if (!lps0_device_handle)
- return;
+ if (!lps0_device_handle || sleep_no_lps0)
+ return 0;
if (pm_debug_messages_on)
lpi_check_constraints();
+ acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
+ acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
+
+ return 0;
+}
+
+static void acpi_s2idle_wake(void)
+{
+ /*
+ * If IRQD_WAKEUP_ARMED is set for the SCI at this point, the SCI has
+ * not triggered while suspended, so bail out.
+ */
+ if (!acpi_sci_irq_valid() ||
+ irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq)))
+ return;
+
/*
- * If IRQD_WAKEUP_ARMED is not set for the SCI at this point, it means
- * that the SCI has triggered while suspended, so cancel the wakeup in
- * case it has not been a wakeup event (the GPEs will be checked later).
+ * If there are EC events to process, the wakeup may be a spurious one
+ * coming from the EC.
*/
- if (acpi_sci_irq_valid() &&
- !irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) {
+ if (acpi_ec_dispatch_gpe()) {
+ /*
+ * Cancel the wakeup and process all pending events in case
+ * there are any wakeup ones in there.
+ *
+ * Note that if any non-EC GPEs are active at this point, the
+ * SCI will retrigger after the rearming below, so no events
+ * should be missed by canceling the wakeup here.
+ */
pm_system_cancel_wakeup();
- s2idle_wakeup = true;
/*
- * On some platforms with the LPS0 _DSM device noirq resume
- * takes too much time for EC wakeup events to survive, so look
- * for them now.
+ * The EC driver uses the system workqueue and an additional
+ * special one, so those need to be flushed too.
*/
- acpi_ec_dispatch_gpe();
+ acpi_os_wait_events_complete(); /* synchronize EC GPE processing */
+ acpi_ec_flush_work();
+ acpi_os_wait_events_complete(); /* synchronize Notify handling */
+
+ rearm_wake_irq(acpi_sci_irq);
}
}
-static void acpi_s2idle_sync(void)
+static void acpi_s2idle_restore_early(void)
{
- /*
- * Process all pending events in case there are any wakeup ones.
- *
- * The EC driver uses the system workqueue and an additional special
- * one, so those need to be flushed too.
- */
- acpi_os_wait_events_complete(); /* synchronize SCI IRQ handling */
- acpi_ec_flush_work();
- acpi_os_wait_events_complete(); /* synchronize Notify handling */
- s2idle_wakeup = false;
+ if (!lps0_device_handle || sleep_no_lps0)
+ return;
+
+ acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);
+ acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON);
}
static void acpi_s2idle_restore(void)
{
+ s2idle_wakeup = false;
+
acpi_enable_all_runtime_gpes();
acpi_disable_wakeup_devices(ACPI_STATE_S0);
- if (acpi_sci_irq_valid())
- disable_irq_wake(acpi_sci_irq);
-
- if (lps0_device_handle) {
+ if (acpi_sci_irq_valid()) {
acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE);
-
- acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);
- acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON);
+ disable_irq_wake(acpi_sci_irq);
}
}
static void acpi_s2idle_end(void)
{
- s2idle_in_progress = false;
acpi_scan_lock_release();
}
static const struct platform_s2idle_ops acpi_s2idle_ops = {
.begin = acpi_s2idle_begin,
.prepare = acpi_s2idle_prepare,
+ .prepare_late = acpi_s2idle_prepare_late,
.wake = acpi_s2idle_wake,
- .sync = acpi_s2idle_sync,
+ .restore_early = acpi_s2idle_restore_early,
.restore = acpi_s2idle_restore,
.end = acpi_s2idle_end,
};
@@ -1063,7 +1080,6 @@ static void acpi_sleep_suspend_setup(void)
}
#else /* !CONFIG_SUSPEND */
-#define s2idle_in_progress (false)
#define s2idle_wakeup (false)
#define lps0_device_handle (NULL)
static inline void acpi_sleep_suspend_setup(void) {}
@@ -1074,11 +1090,6 @@ bool acpi_s2idle_wakeup(void)
return s2idle_wakeup;
}
-bool acpi_sleep_no_ec_events(void)
-{
- return !s2idle_in_progress || !lps0_device_handle;
-}
-
#ifdef CONFIG_PM_SLEEP
static u32 saved_bm_rld;
generated by cgit (git 2.34.1) at 2025-02-26 01:09:28 +0000