/**
* acpi_dev_suspend_late - Put device into a low-power state using ACPI.
* @dev: Device to put into a low-power state.
*
* Put the given device into a low-power state during system transition to a
* sleep state using the standard ACPI mechanism. Set up system wakeup if
* desired, choose the state to put the device into (this checks if system
* wakeup is expected to work too), and set the power state of the device.
*/
int acpi_dev_suspend_late(struct device *dev)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
u32 target_state;
bool wakeup;
bool can_wakeup;
int error;
if (!adev)
return 0;
target_state = acpi_target_system_state();
wakeup = device_may_wakeup(dev);
can_wakeup = acpi_device_can_wakeup(adev);
if (can_wakeup) {
error = __acpi_device_sleep_wake(adev, target_state, wakeup);
if (wakeup && error)
return error;
} else if (wakeup) {
dev_warn(dev,
"device is not wakeup-capable, not enabling wakeup\n");
}
error = acpi_dev_pm_low_power(dev, adev, target_state);
if (error && can_wakeup)
__acpi_device_sleep_wake(adev, ACPI_STATE_UNKNOWN, false);
return error;
}
static bool suspend_to_idle(struct drm_i915_private *dev_priv)
{
#if IS_ENABLED(CONFIG_ACPI_SLEEP)
if (acpi_target_system_state() < ACPI_STATE_S3)
return true;
#endif
return false;
}
/**
* acpi_pm_device_sleep_state - Get preferred power state of ACPI device.
* @dev: Device whose preferred target power state to return.
* @d_min_p: Location to store the upper limit of the allowed states range.
* @d_max_in: Deepest low-power state to take into consideration.
* Return value: Preferred power state of the device on success, -ENODEV
* (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure
*
* The caller must ensure that @dev is valid before using this function.
*/
int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in)
{
acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
struct acpi_device *adev;
if (!handle || acpi_bus_get_device(handle, &adev)) {
dev_dbg(dev, "ACPI handle without context in %s!\n", __func__);
return -ENODEV;
}
return acpi_device_power_state(dev, adev, acpi_target_system_state(),
d_max_in, d_min_p);
}
/**
* acpi_pm_device_sleep_state - Get preferred power state of ACPI device.
* @dev: Device whose preferred target power state to return.
* @d_min_p: Location to store the upper limit of the allowed states range.
* @d_max_in: Deepest low-power state to take into consideration.
* Return value: Preferred power state of the device on success, -ENODEV
* if there's no 'struct acpi_device' for @dev, -EINVAL if @d_max_in is
* incorrect, or -ENODATA on ACPI method failure.
*
* The caller must ensure that @dev is valid before using this function.
*/
int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in)
{
struct acpi_device *adev;
int ret, d_min, d_max;
if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3_COLD)
return -EINVAL;
if (d_max_in > ACPI_STATE_D3_HOT) {
enum pm_qos_flags_status stat;
stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF);
if (stat == PM_QOS_FLAGS_ALL)
d_max_in = ACPI_STATE_D3_HOT;
}
adev = ACPI_COMPANION(dev);
if (!adev) {
dev_dbg(dev, "ACPI companion missing in %s!\n", __func__);
return -ENODEV;
}
ret = acpi_dev_pm_get_state(dev, adev, acpi_target_system_state(),
&d_min, &d_max);
if (ret)
return ret;
if (d_max_in < d_min)
return -EINVAL;
if (d_max > d_max_in) {
for (d_max = d_max_in; d_max > d_min; d_max--) {
if (adev->power.states[d_max].flags.valid)
break;
}
}
if (d_min_p)
*d_min_p = d_min;
return d_max;
}
/**
* acpi_pm_device_sleep_state - Get preferred power state of ACPI device.
* @dev: Device whose preferred target power state to return.
* @d_min_p: Location to store the upper limit of the allowed states range.
* @d_max_in: Deepest low-power state to take into consideration.
* Return value: Preferred power state of the device on success, -ENODEV
* if there's no 'struct acpi_device' for @dev, -EINVAL if @d_max_in is
* incorrect, or -ENODATA on ACPI method failure.
*
* The caller must ensure that @dev is valid before using this function.
*/
int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in)
{
acpi_handle handle = ACPI_HANDLE(dev);
struct acpi_device *adev;
int ret, d_min, d_max;
if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3_COLD)
return -EINVAL;
if (d_max_in > ACPI_STATE_D3_HOT) {
enum pm_qos_flags_status stat;
stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF);
if (stat == PM_QOS_FLAGS_ALL)
d_max_in = ACPI_STATE_D3_HOT;
}
if (!handle || acpi_bus_get_device(handle, &adev)) {
dev_dbg(dev, "ACPI handle without context in %s!\n", __func__);
return -ENODEV;
}
ret = acpi_dev_pm_get_state(dev, adev, acpi_target_system_state(),
&d_min, &d_max);
if (ret)
return ret;
if (d_max_in < d_min)
return -EINVAL;
if (d_max > d_max_in) {
for (d_max = d_max_in; d_max > d_min; d_max--) {
if (adev->power.states[d_max].flags.valid)
break;
}
}
if (d_min_p)
*d_min_p = d_min;
return d_max;
}
/**
* acpi_pm_device_sleep_wake - Enable or disable device to wake up the system.
* @dev: Device to enable/desible to wake up the system from sleep states.
* @enable: Whether to enable or disable @dev to wake up the system.
*/
int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
struct acpi_device *adev;
int error;
if (!device_can_wakeup(dev))
return -EINVAL;
adev = ACPI_COMPANION(dev);
if (!adev) {
dev_dbg(dev, "ACPI companion missing in %s!\n", __func__);
return -ENODEV;
}
error = acpi_device_wakeup(adev, acpi_target_system_state(), enable);
if (!error)
dev_info(dev, "System wakeup %s by ACPI\n",
enable ? "enabled" : "disabled");
return error;
}
/**
* acpi_dev_suspend_late - Put device into a low-power state using ACPI.
* @dev: Device to put into a low-power state.
*
* Put the given device into a low-power state during system transition to a
* sleep state using the standard ACPI mechanism. Set up system wakeup if
* desired, choose the state to put the device into (this checks if system
* wakeup is expected to work too), and set the power state of the device.
*/
int acpi_dev_suspend_late(struct device *dev)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
u32 target_state;
bool wakeup;
int error;
if (!adev)
return 0;
target_state = acpi_target_system_state();
wakeup = device_may_wakeup(dev) && acpi_device_can_wakeup(adev);
error = acpi_device_wakeup(adev, target_state, wakeup);
if (wakeup && error)
return error;
error = acpi_dev_pm_low_power(dev, adev, target_state);
if (error)
acpi_device_wakeup(adev, ACPI_STATE_UNKNOWN, false);
return error;
}
/**
* acpi_dev_suspend_late - Put device into a low-power state using ACPI.
* @dev: Device to put into a low-power state.
*
* Put the given device into a low-power state during system transition to a
* sleep state using the standard ACPI mechanism. Set up system wakeup if
* desired, choose the state to put the device into (this checks if system
* wakeup is expected to work too), and set the power state of the device.
*/
int acpi_dev_suspend_late(struct device *dev)
{
struct acpi_device *adev = acpi_dev_pm_get_node(dev);
u32 target_state;
bool wakeup;
int error;
if (!adev)
return 0;
target_state = acpi_target_system_state();
wakeup = device_may_wakeup(dev);
error = __acpi_device_sleep_wake(adev, target_state, wakeup);
if (wakeup && error)
return error;
error = acpi_dev_pm_low_power(dev, adev, target_state);
if (error)
__acpi_device_sleep_wake(adev, ACPI_STATE_UNKNOWN, false);
return error;
}
/**
* acpi_pm_device_sleep_wake - Enable or disable device to wake up the system.
* @dev: Device to enable/desible to wake up the system from sleep states.
* @enable: Whether to enable or disable @dev to wake up the system.
*/
int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
acpi_handle handle;
struct acpi_device *adev;
int error;
if (!device_can_wakeup(dev))
return -EINVAL;
handle = ACPI_HANDLE(dev);
if (!handle || acpi_bus_get_device(handle, &adev)) {
dev_dbg(dev, "ACPI handle without context in %s!\n", __func__);
return -ENODEV;
}
error = __acpi_device_sleep_wake(adev, acpi_target_system_state(),
enable);
if (!error)
dev_info(dev, "System wakeup %s by ACPI\n",
enable ? "enabled" : "disabled");
return error;
}
/**
* acpi_subsys_prepare - Prepare device for system transition to a sleep state.
* @dev: Device to prepare.
*/
int acpi_subsys_prepare(struct device *dev)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
u32 sys_target;
int ret, state;
ret = pm_generic_prepare(dev);
if (ret < 0)
return ret;
if (!adev || !pm_runtime_suspended(dev)
|| device_may_wakeup(dev) != !!adev->wakeup.prepare_count)
return 0;
sys_target = acpi_target_system_state();
if (sys_target == ACPI_STATE_S0)
return 1;
if (adev->power.flags.dsw_present)
return 0;
ret = acpi_dev_pm_get_state(dev, adev, sys_target, NULL, &state);
return !ret && state == adev->power.state;
}
static inline bool need_suspend(void)
{
return acpi_target_system_state() == ACPI_STATE_S0;
}
static int i915_drm_freeze(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;
pci_power_t opregion_target_state;
/* ignore lid events during suspend */
mutex_lock(&dev_priv->modeset_restore_lock);
dev_priv->modeset_restore = MODESET_SUSPENDED;
mutex_unlock(&dev_priv->modeset_restore_lock);
/* We do a lot of poking in a lot of registers, make sure they work
* properly. */
intel_display_set_init_power(dev_priv, true);
drm_kms_helper_poll_disable(dev);
pci_save_state(dev->pdev);
/* If KMS is active, we do the leavevt stuff here */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
int error;
error = i915_gem_suspend(dev);
if (error) {
dev_err(&dev->pdev->dev,
"GEM idle failed, resume might fail\n");
return error;
}
/*
* Disable CRTCs directly since we want to preserve sw state
* for _thaw. Also, power gate the CRTC power wells.
*/
drm_modeset_lock_all(dev);
for_each_crtc(dev, crtc)
intel_crtc_control(crtc, false);
drm_modeset_unlock_all(dev);
intel_dp_mst_suspend(dev);
flush_delayed_work(&dev_priv->rps.delayed_resume_work);
intel_runtime_pm_disable_interrupts(dev);
intel_suspend_gt_powersave(dev);
intel_modeset_suspend_hw(dev);
}
i915_gem_suspend_gtt_mappings(dev);
i915_save_state(dev);
opregion_target_state = PCI_D3cold;
#if IS_ENABLED(CONFIG_ACPI_SLEEP)
if (acpi_target_system_state() < ACPI_STATE_S3)
opregion_target_state = PCI_D1;
#endif
intel_opregion_notify_adapter(dev, opregion_target_state);
intel_uncore_forcewake_reset(dev, false);
intel_opregion_fini(dev);
console_lock();
intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED);
console_unlock();
dev_priv->suspend_count++;
intel_display_set_init_power(dev_priv, false);
return 0;
}