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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-09-04 00:06:02 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-09-04 00:06:02 +0200
commit7b01463e51f6849d0787b24d06a62efcb243dd44 (patch)
treec084f9b5290fe4b6f279e711c0ada7be9dca8b32 /drivers/acpi/sleep.c
parenta1b5fd8fa29fb2359f398ef17a706449d94de80d (diff)
parent726fb6b4f2a82a14a906f39bdabac4863b87c01a (diff)
downloadlinux-7b01463e51f6849d0787b24d06a62efcb243dd44.tar.bz2
Merge branch 'pm-sleep'
* pm-sleep: ACPI / PM: Check low power idle constraints for debug only PM / s2idle: Rename platform operations structure PM / s2idle: Rename ->enter_freeze to ->enter_s2idle PM / s2idle: Rename freeze_state enum and related items PM / s2idle: Rename PM_SUSPEND_FREEZE to PM_SUSPEND_TO_IDLE ACPI / PM: Prefer suspend-to-idle over S3 on some systems platform/x86: intel-hid: Wake up Dell Latitude 7275 from suspend-to-idle PM / suspend: Define pr_fmt() in suspend.c PM / suspend: Use mem_sleep_labels[] strings in messages PM / sleep: Put pm_test under CONFIG_PM_SLEEP_DEBUG PM / sleep: Check pm_wakeup_pending() in __device_suspend_noirq() PM / core: Add error argument to dpm_show_time() PM / core: Split dpm_suspend_noirq() and dpm_resume_noirq() PM / s2idle: Rearrange the main suspend-to-idle loop PM / timekeeping: Print debug messages when requested PM / sleep: Mark suspend/hibernation start and finish PM / sleep: Do not print debug messages by default PM / suspend: Export pm_suspend_target_state
Diffstat (limited to 'drivers/acpi/sleep.c')
-rw-r--r--drivers/acpi/sleep.c202
1 files changed, 188 insertions, 14 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index fa8243c5c062..09460d9f9208 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -669,6 +669,7 @@ static const struct acpi_device_id lps0_device_ids[] = {
#define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66"
+#define ACPI_LPS0_GET_DEVICE_CONSTRAINTS 1
#define ACPI_LPS0_SCREEN_OFF 3
#define ACPI_LPS0_SCREEN_ON 4
#define ACPI_LPS0_ENTRY 5
@@ -680,6 +681,166 @@ static acpi_handle lps0_device_handle;
static guid_t lps0_dsm_guid;
static char lps0_dsm_func_mask;
+/* Device constraint entry structure */
+struct lpi_device_info {
+ char *name;
+ int enabled;
+ union acpi_object *package;
+};
+
+/* Constraint package structure */
+struct lpi_device_constraint {
+ int uid;
+ int min_dstate;
+ int function_states;
+};
+
+struct lpi_constraints {
+ acpi_handle handle;
+ int min_dstate;
+};
+
+static struct lpi_constraints *lpi_constraints_table;
+static int lpi_constraints_table_size;
+
+static void lpi_device_get_constraints(void)
+{
+ union acpi_object *out_obj;
+ int i;
+
+ out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid,
+ 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS,
+ NULL, ACPI_TYPE_PACKAGE);
+
+ acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n",
+ out_obj ? "successful" : "failed");
+
+ if (!out_obj)
+ return;
+
+ lpi_constraints_table = kcalloc(out_obj->package.count,
+ sizeof(*lpi_constraints_table),
+ GFP_KERNEL);
+ if (!lpi_constraints_table)
+ goto free_acpi_buffer;
+
+ acpi_handle_debug(lps0_device_handle, "LPI: constraints list begin:\n");
+
+ for (i = 0; i < out_obj->package.count; i++) {
+ struct lpi_constraints *constraint;
+ acpi_status status;
+ union acpi_object *package = &out_obj->package.elements[i];
+ struct lpi_device_info info = { };
+ int package_count = 0, j;
+
+ if (!package)
+ continue;
+
+ for (j = 0; j < package->package.count; ++j) {
+ union acpi_object *element =
+ &(package->package.elements[j]);
+
+ switch (element->type) {
+ case ACPI_TYPE_INTEGER:
+ info.enabled = element->integer.value;
+ break;
+ case ACPI_TYPE_STRING:
+ info.name = element->string.pointer;
+ break;
+ case ACPI_TYPE_PACKAGE:
+ package_count = element->package.count;
+ info.package = element->package.elements;
+ break;
+ }
+ }
+
+ if (!info.enabled || !info.package || !info.name)
+ continue;
+
+ constraint = &lpi_constraints_table[lpi_constraints_table_size];
+
+ status = acpi_get_handle(NULL, info.name, &constraint->handle);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ acpi_handle_debug(lps0_device_handle,
+ "index:%d Name:%s\n", i, info.name);
+
+ constraint->min_dstate = -1;
+
+ for (j = 0; j < package_count; ++j) {
+ union acpi_object *info_obj = &info.package[j];
+ union acpi_object *cnstr_pkg;
+ union acpi_object *obj;
+ struct lpi_device_constraint dev_info;
+
+ switch (info_obj->type) {
+ case ACPI_TYPE_INTEGER:
+ /* version */
+ break;
+ case ACPI_TYPE_PACKAGE:
+ if (info_obj->package.count < 2)
+ break;
+
+ cnstr_pkg = info_obj->package.elements;
+ obj = &cnstr_pkg[0];
+ dev_info.uid = obj->integer.value;
+ obj = &cnstr_pkg[1];
+ dev_info.min_dstate = obj->integer.value;
+
+ acpi_handle_debug(lps0_device_handle,
+ "uid:%d min_dstate:%s\n",
+ dev_info.uid,
+ acpi_power_state_string(dev_info.min_dstate));
+
+ constraint->min_dstate = dev_info.min_dstate;
+ break;
+ }
+ }
+
+ if (constraint->min_dstate < 0) {
+ acpi_handle_debug(lps0_device_handle,
+ "Incomplete constraint defined\n");
+ continue;
+ }
+
+ lpi_constraints_table_size++;
+ }
+
+ acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n");
+
+free_acpi_buffer:
+ ACPI_FREE(out_obj);
+}
+
+static void lpi_check_constraints(void)
+{
+ int i;
+
+ for (i = 0; i < lpi_constraints_table_size; ++i) {
+ struct acpi_device *adev;
+
+ if (acpi_bus_get_device(lpi_constraints_table[i].handle, &adev))
+ continue;
+
+ acpi_handle_debug(adev->handle,
+ "LPI: required min power state:%s current power state:%s\n",
+ acpi_power_state_string(lpi_constraints_table[i].min_dstate),
+ acpi_power_state_string(adev->power.state));
+
+ if (!adev->flags.power_manageable) {
+ acpi_handle_info(adev->handle, "LPI: Device not power manageble\n");
+ continue;
+ }
+
+ if (adev->power.state < lpi_constraints_table[i].min_dstate)
+ acpi_handle_info(adev->handle,
+ "LPI: Constraint not met; min power state:%s current power state:%s\n",
+ acpi_power_state_string(lpi_constraints_table[i].min_dstate),
+ acpi_power_state_string(adev->power.state));
+ }
+}
+
static void acpi_sleep_run_lps0_dsm(unsigned int func)
{
union acpi_object *out_obj;
@@ -714,6 +875,12 @@ static int lps0_device_attach(struct acpi_device *adev,
if ((bitmask & ACPI_S2IDLE_FUNC_MASK) == ACPI_S2IDLE_FUNC_MASK) {
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",
@@ -723,6 +890,9 @@ static int lps0_device_attach(struct acpi_device *adev,
"_DSM function 0 evaluation failed\n");
}
ACPI_FREE(out_obj);
+
+ lpi_device_get_constraints();
+
return 0;
}
@@ -731,14 +901,14 @@ static struct acpi_scan_handler lps0_handler = {
.attach = lps0_device_attach,
};
-static int acpi_freeze_begin(void)
+static int acpi_s2idle_begin(void)
{
acpi_scan_lock_acquire();
s2idle_in_progress = true;
return 0;
}
-static int acpi_freeze_prepare(void)
+static int acpi_s2idle_prepare(void)
{
if (lps0_device_handle) {
acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
@@ -758,8 +928,12 @@ static int acpi_freeze_prepare(void)
return 0;
}
-static void acpi_freeze_wake(void)
+static void acpi_s2idle_wake(void)
{
+
+ if (pm_debug_messages_on)
+ lpi_check_constraints();
+
/*
* 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
@@ -772,7 +946,7 @@ static void acpi_freeze_wake(void)
}
}
-static void acpi_freeze_sync(void)
+static void acpi_s2idle_sync(void)
{
/*
* Process all pending events in case there are any wakeup ones.
@@ -785,7 +959,7 @@ static void acpi_freeze_sync(void)
s2idle_wakeup = false;
}
-static void acpi_freeze_restore(void)
+static void acpi_s2idle_restore(void)
{
if (acpi_sci_irq_valid())
disable_irq_wake(acpi_sci_irq);
@@ -798,19 +972,19 @@ static void acpi_freeze_restore(void)
}
}
-static void acpi_freeze_end(void)
+static void acpi_s2idle_end(void)
{
s2idle_in_progress = false;
acpi_scan_lock_release();
}
-static const struct platform_freeze_ops acpi_freeze_ops = {
- .begin = acpi_freeze_begin,
- .prepare = acpi_freeze_prepare,
- .wake = acpi_freeze_wake,
- .sync = acpi_freeze_sync,
- .restore = acpi_freeze_restore,
- .end = acpi_freeze_end,
+static const struct platform_s2idle_ops acpi_s2idle_ops = {
+ .begin = acpi_s2idle_begin,
+ .prepare = acpi_s2idle_prepare,
+ .wake = acpi_s2idle_wake,
+ .sync = acpi_s2idle_sync,
+ .restore = acpi_s2idle_restore,
+ .end = acpi_s2idle_end,
};
static void acpi_sleep_suspend_setup(void)
@@ -825,7 +999,7 @@ static void acpi_sleep_suspend_setup(void)
&acpi_suspend_ops_old : &acpi_suspend_ops);
acpi_scan_add_handler(&lps0_handler);
- freeze_set_ops(&acpi_freeze_ops);
+ s2idle_set_ops(&acpi_s2idle_ops);
}
#else /* !CONFIG_SUSPEND */