Пример #1
0
/**
 * 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;
}
Пример #2
0
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;
}
Пример #3
0
/**
 * 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);
}
Пример #4
0
/**
 * 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;
}
Пример #5
0
/**
 * 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;
}
Пример #6
0
/**
 * 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;
}
Пример #7
0
/**
 * 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;
}
Пример #8
0
/**
 * 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;
}
Пример #9
0
/**
 * 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;
}
Пример #10
0
/**
 * 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;
}
Пример #11
0
static inline bool need_suspend(void)
{
	return acpi_target_system_state() == ACPI_STATE_S0;
}
Пример #12
0
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;
}