path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c

/*
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Rafał Miłecki <zajec5@gmail.com>
 *          Alex Deucher <alexdeucher@gmail.com>
 */
#include <drm/drmP.h>
#include "amdgpu.h"
#include "amdgpu_drv.h"
#include "amdgpu_pm.h"
#include "amdgpu_dpm.h"
#include "atom.h"
#include <linux/power_supply.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>

#include "amd_powerplay.h"

static int amdgpu_debugfs_pm_init(struct amdgpu_device *adev);

void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev)
{
	if (adev->pp_enabled)
		/* TODO */
		return;

	if (adev->pm.dpm_enabled) {
		mutex_lock(&adev->pm.mutex);
		if (power_supply_is_system_supplied() > 0)
			adev->pm.dpm.ac_power = true;
		else
			adev->pm.dpm.ac_power = false;
		if (adev->pm.funcs->enable_bapm)
			amdgpu_dpm_enable_bapm(adev, adev->pm.dpm.ac_power);
		mutex_unlock(&adev->pm.mutex);
	}
}

static ssize_t amdgpu_get_dpm_state(struct device *dev,
				    struct device_attribute *attr,
				    char *buf)
{
	struct drm_device *ddev = dev_get_drvdata(dev);
	struct amdgpu_device *adev = ddev->dev_private;
	enum amd_pm_state_type pm;

	if (adev->pp_enabled) {
		pm = amdgpu_dpm_get_current_power_state(adev);
	} else
		pm = adev->pm.dpm.user_state;

	return snprintf(buf, PAGE_SIZE, "%s\n",
			(pm == POWER_STATE_TYPE_BATTERY) ? "battery" :
			(pm == POWER_STATE_TYPE_BALANCED) ? "balanced" : "performance");
}

static ssize_t amdgpu_set_dpm_state(struct device *dev,
				    struct device_attribute *attr,
				    const char *buf,
				    size_t count)
{
	struct drm_device *ddev = dev_get_drvdata(dev);
	struct amdgpu_device *adev = ddev->dev_private;
	enum amd_pm_state_type  state;

	if (strncmp("battery", buf, strlen("battery")) == 0)
		state = POWER_STATE_TYPE_BATTERY;
	else if (strncmp("balanced", buf, strlen("balanced")) == 0)
		state = POWER_STATE_TYPE_BALANCED;
	else if (strncmp("performance", buf, strlen("performance")) == 0)
		state = POWER_STATE_TYPE_PERFORMANCE;
	else {
		count = -EINVAL;
		goto fail;
	}

	if (adev->pp_enabled) {
		amdgpu_dpm_dispatch_task(adev, AMD_PP_EVENT_ENABLE_USER_STATE, &state, NULL);
	} else {
		mutex_lock(&adev->pm.mutex);
		adev->pm.dpm.user_state = state;
		mutex_unlock(&adev->pm.mutex);

		/* Can't set dpm state when the card is off */
		if (!(adev->flags & AMD_IS_PX) ||
		    (ddev->switch_power_state == DRM_SWITCH_POWER_ON))
			amdgpu_pm_compute_clocks(adev);
	}
fail:
	return count;
}

static ssize_t amdgpu_get_dpm_forced_performance_level(struct device *dev,
						struct device_attribute *attr,