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/*

 * 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 

 *          Alex Deucher 

 */

#include "drmP.h"

#include "radeon.h"

#include "avivod.h"

#include "atom.h"

#define DRM_DEBUG_DRIVER(fmt, args...)

#define RADEON_IDLE_LOOP_MS 100

#define RADEON_RECLOCK_DELAY_MS 200

#define RADEON_WAIT_VBLANK_TIMEOUT 200

#define RADEON_WAIT_IDLE_TIMEOUT 200

static const char *radeon_pm_state_type_name[5] = {

	"Default",

	"Powersave",

	"Battery",

	"Balanced",

	"Performance",

};

static void radeon_dynpm_idle_work_handler(struct work_struct *work);

static int radeon_debugfs_pm_init(struct radeon_device *rdev);

static bool radeon_pm_in_vbl(struct radeon_device *rdev);

static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);

static void radeon_pm_update_profile(struct radeon_device *rdev);

static void radeon_pm_set_clocks(struct radeon_device *rdev);

static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }

#define ACPI_AC_CLASS           "ac_adapter"

#ifdef CONFIG_ACPI

static int radeon_acpi_event(struct notifier_block *nb,

			     unsigned long val,

			     void *data)

{

	struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);

	struct acpi_bus_event *entry = (struct acpi_bus_event *)data;

	if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {

		if (power_supply_is_system_supplied() > 0)

			DRM_DEBUG_DRIVER("pm: AC\n");

		else

			DRM_DEBUG_DRIVER("pm: DC\n");

		if (rdev->pm.pm_method == PM_METHOD_PROFILE) {

			if (rdev->pm.profile == PM_PROFILE_AUTO) {

				mutex_lock(&rdev->pm.mutex);

				radeon_pm_update_profile(rdev);

				radeon_pm_set_clocks(rdev);

				mutex_unlock(&rdev->pm.mutex);

		}

	}

	}

	return NOTIFY_OK;

}

#endif

static void radeon_pm_update_profile(struct radeon_device *rdev)

{

	switch (rdev->pm.profile) {

	case PM_PROFILE_DEFAULT:

		rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;

		break;

	case PM_PROFILE_AUTO:

		if (power_supply_is_system_supplied() > 0) {

			if (rdev->pm.active_crtc_count > 1)

				rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;

			else

				rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;

		} else {

			if (rdev->pm.active_crtc_count > 1)

				rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;

			else

				rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;

		}

		break;

	case PM_PROFILE_LOW:

		if (rdev->pm.active_crtc_count > 1)

			rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;

		else

			rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;

		break;

	case PM_PROFILE_MID:

		if (rdev->pm.active_crtc_count > 1)

			rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;

		else

			rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;

		break;

	case PM_PROFILE_HIGH:

		if (rdev->pm.active_crtc_count > 1)

			rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;

		else

			rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;

		break;

	}

	if (rdev->pm.active_crtc_count == 0) {

		rdev->pm.requested_power_state_index =

			rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;

		rdev->pm.requested_clock_mode_index =

			rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;

	} else {

		rdev->pm.requested_power_state_index =

			rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;

		rdev->pm.requested_clock_mode_index =

			rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;

		}

}

static void radeon_unmap_vram_bos(struct radeon_device *rdev)

{

	struct radeon_bo *bo, *n;

	if (list_empty(&rdev->gem.objects))

		return;

}

static void radeon_set_power_state(struct radeon_device *rdev)

{

	u32 sclk, mclk;

	bool misc_after = false;

	if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&

	    (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))

		return;

	if (radeon_gui_idle(rdev)) {

		sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].

			clock_info[rdev->pm.requested_clock_mode_index].sclk;

		if (sclk > rdev->pm.default_sclk)

			sclk = rdev->pm.default_sclk;

		mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].

			clock_info[rdev->pm.requested_clock_mode_index].mclk;

		if (mclk > rdev->pm.default_mclk)

			mclk = rdev->pm.default_mclk;

		/* upvolt before raising clocks, downvolt after lowering clocks */

		if (sclk < rdev->pm.current_sclk)

			misc_after = true;

//       radeon_sync_with_vblank(rdev);

		if (rdev->pm.pm_method == PM_METHOD_DYNPM) {

			if (!radeon_pm_in_vbl(rdev))

				return;

		}

		radeon_pm_prepare(rdev);

		if (!misc_after)

			/* voltage, pcie lanes, etc.*/

			radeon_pm_misc(rdev);

	/* set engine clock */

		if (sclk != rdev->pm.current_sclk) {

	radeon_pm_debug_check_in_vbl(rdev, false);

			radeon_set_engine_clock(rdev, sclk);

	radeon_pm_debug_check_in_vbl(rdev, true);

			rdev->pm.current_sclk = sclk;

			DRM_DEBUG_DRIVER("Setting: e: %d\n", sclk);

		}

	/* set memory clock */

		if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {

		radeon_pm_debug_check_in_vbl(rdev, false);

			radeon_set_memory_clock(rdev, mclk);

		radeon_pm_debug_check_in_vbl(rdev, true);

			rdev->pm.current_mclk = mclk;

			DRM_DEBUG_DRIVER("Setting: m: %d\n", mclk);

		}

		if (misc_after)

			/* voltage, pcie lanes, etc.*/

			radeon_pm_misc(rdev);

		radeon_pm_finish(rdev);

		rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;

		rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;

	} else

		DRM_DEBUG_DRIVER("pm: GUI not idle!!!\n");

}

static void radeon_pm_set_clocks(struct radeon_device *rdev)

{

	int i;

	/* no need to take locks, etc. if nothing's going to change */

	if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&

	    (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))

		return;

	mutex_lock(&rdev->ddev->struct_mutex);

	mutex_lock(&rdev->vram_mutex);

	mutex_lock(&rdev->cp.mutex);

	/* gui idle int has issues on older chips it seems */

	if (rdev->family >= CHIP_R600) {

		if (rdev->irq.installed) {

			/* wait for GPU idle */

			rdev->pm.gui_idle = false;

			rdev->irq.gui_idle = true;

        }

	} else {

		if (rdev->cp.ready) {

//           struct radeon_fence *fence;

//           radeon_ring_alloc(rdev, 64);

//           radeon_fence_create(rdev, &fence);

//           radeon_fence_emit(rdev, fence);

//           radeon_ring_commit(rdev);

//           radeon_fence_wait(fence, false);

//           radeon_fence_unref(&fence);

		}

	}

	radeon_unmap_vram_bos(rdev);

	if (rdev->irq.installed) {

		for (i = 0; i < rdev->num_crtc; i++) {

			if (rdev->pm.active_crtcs & (1 << i)) {

				rdev->pm.req_vblank |= (1 << i);

//               drm_vblank_get(rdev->ddev, i);

			}

		}

	}

	radeon_set_power_state(rdev);

	if (rdev->irq.installed) {

		for (i = 0; i < rdev->num_crtc; i++) {

			if (rdev->pm.req_vblank & (1 << i)) {

				rdev->pm.req_vblank &= ~(1 << i);

//               drm_vblank_put(rdev->ddev, i);

			}

		}

	}

	/* update display watermarks based on new power state */

	radeon_update_bandwidth_info(rdev);

	if (rdev->pm.active_crtc_count)

		radeon_bandwidth_update(rdev);

	rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;

	mutex_unlock(&rdev->cp.mutex);

	mutex_unlock(&rdev->vram_mutex);

	mutex_unlock(&rdev->ddev->struct_mutex);

}

static void radeon_pm_print_states(struct radeon_device *rdev)

{

	int i, j;

	struct radeon_power_state *power_state;

	struct radeon_pm_clock_info *clock_info;

	DRM_DEBUG_DRIVER("%d Power State(s)\n", rdev->pm.num_power_states);

	for (i = 0; i < rdev->pm.num_power_states; i++) {

		power_state = &rdev->pm.power_state[i];

		DRM_DEBUG_DRIVER("State %d: %s\n", i,

			radeon_pm_state_type_name[power_state->type]);

		if (i == rdev->pm.default_power_state_index)

			DRM_DEBUG_DRIVER("\tDefault");

		if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))

			DRM_DEBUG_DRIVER("\t%d PCIE Lanes\n", power_state->pcie_lanes);

		if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)

			DRM_DEBUG_DRIVER("\tSingle display only\n");

		DRM_DEBUG_DRIVER("\t%d Clock Mode(s)\n", power_state->num_clock_modes);

		for (j = 0; j < power_state->num_clock_modes; j++) {

			clock_info = &(power_state->clock_info[j]);

			if (rdev->flags & RADEON_IS_IGP)

				DRM_DEBUG_DRIVER("\t\t%d e: %d%s\n",

					j,

					clock_info->sclk * 10,

					clock_info->flags & RADEON_PM_MODE_NO_DISPLAY ? "\tNo display only" : "");

			else

				DRM_DEBUG_DRIVER("\t\t%d e: %d\tm: %d\tv: %d%s\n",

					j,

					clock_info->sclk * 10,

					clock_info->mclk * 10,

					clock_info->voltage.voltage,

					clock_info->flags & RADEON_PM_MODE_NO_DISPLAY ? "\tNo display only" : "");

		}

	}

}

static ssize_t radeon_get_pm_profile(struct device *dev,

				     struct device_attribute *attr,

				     char *buf)

{

    return snprintf(buf, PAGE_SIZE, "%s\n", "default");

}

static ssize_t radeon_set_pm_profile(struct device *dev,

				     struct device_attribute *attr,

				     const char *buf,

				     size_t count)

{

	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));

	struct radeon_device *rdev = ddev->dev_private;

	mutex_lock(&rdev->pm.mutex);

    rdev->pm.profile = PM_PROFILE_DEFAULT;

    radeon_pm_update_profile(rdev);

    radeon_pm_set_clocks(rdev);

fail:

	mutex_unlock(&rdev->pm.mutex);

	return count;

}

static ssize_t radeon_get_pm_method(struct device *dev,

				    struct device_attribute *attr,

				    char *buf)

{

	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));

	struct radeon_device *rdev = ddev->dev_private;

	int pm = rdev->pm.pm_method;

	return snprintf(buf, PAGE_SIZE, "%s\n",

			(pm == PM_METHOD_DYNPM) ? "dynpm" : "profile");

}

static ssize_t radeon_set_pm_method(struct device *dev,

				    struct device_attribute *attr,

				    const char *buf,

				    size_t count)

{

	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));

	struct radeon_device *rdev = ddev->dev_private;

	if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {

		mutex_lock(&rdev->pm.mutex);

		rdev->pm.pm_method = PM_METHOD_DYNPM;

		rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;

		rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;

		mutex_unlock(&rdev->pm.mutex);

	} else if (strncmp("profile", buf, strlen("profile")) == 0) {

		mutex_lock(&rdev->pm.mutex);

		/* disable dynpm */

		rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;

		rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;

		rdev->pm.pm_method = PM_METHOD_PROFILE;

		mutex_unlock(&rdev->pm.mutex);

//		cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);

	} else {

		DRM_ERROR("invalid power method!\n");

		goto fail;

	}

	radeon_pm_compute_clocks(rdev);

fail:

	return count;

}

static ssize_t radeon_hwmon_show_temp(struct device *dev,

				      struct device_attribute *attr,

				      char *buf)

{

	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));

	struct radeon_device *rdev = ddev->dev_private;

	u32 temp;

	switch (rdev->pm.int_thermal_type) {

	case THERMAL_TYPE_RV6XX:

		temp = rv6xx_get_temp(rdev);

		break;

	case THERMAL_TYPE_RV770:

		temp = rv770_get_temp(rdev);

		break;

	case THERMAL_TYPE_EVERGREEN:

	case THERMAL_TYPE_NI:

		temp = evergreen_get_temp(rdev);

		break;

	default:

		temp = 0;

		break;

	}

	return snprintf(buf, PAGE_SIZE, "%d\n", temp);

}

static ssize_t radeon_hwmon_show_name(struct device *dev,

				      struct device_attribute *attr,

				      char *buf)

{

	return sprintf(buf, "radeon\n");

}

static int radeon_hwmon_init(struct radeon_device *rdev)

{

	int err = 0;

	rdev->pm.int_hwmon_dev = NULL;

	return err;

}

static void radeon_hwmon_fini(struct radeon_device *rdev)

{

}

void radeon_pm_suspend(struct radeon_device *rdev)

{

	mutex_lock(&rdev->pm.mutex);

	if (rdev->pm.pm_method == PM_METHOD_DYNPM) {

		if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)

			rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;

	}

	mutex_unlock(&rdev->pm.mutex);

//	cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);

}

void radeon_pm_resume(struct radeon_device *rdev)

{

	/* asic init will reset the default power state */

	mutex_lock(&rdev->pm.mutex);

	rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;

	rdev->pm.current_clock_mode_index = 0;

	rdev->pm.current_sclk = rdev->pm.default_sclk;

	rdev->pm.current_mclk = rdev->pm.default_mclk;

	rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;

	if (rdev->pm.pm_method == PM_METHOD_DYNPM

	    && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {

		rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;

//		schedule_delayed_work(&rdev->pm.dynpm_idle_work,

//					msecs_to_jiffies(RADEON_IDLE_LOOP_MS));

	}

	mutex_unlock(&rdev->pm.mutex);

	radeon_pm_compute_clocks(rdev);

}

int radeon_pm_init(struct radeon_device *rdev)

{

	int ret;

	/* default to profile method */

	rdev->pm.pm_method = PM_METHOD_PROFILE;

	rdev->pm.profile = PM_PROFILE_DEFAULT;

	rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;

	rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;

	rdev->pm.dynpm_can_upclock = true;

	rdev->pm.dynpm_can_downclock = true;

	rdev->pm.default_sclk = rdev->clock.default_sclk;

	rdev->pm.default_mclk = rdev->clock.default_mclk;

	rdev->pm.current_sclk = rdev->clock.default_sclk;

	rdev->pm.current_mclk = rdev->clock.default_mclk;

	rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;

	if (rdev->bios) {

		if (rdev->is_atom_bios)

			radeon_atombios_get_power_modes(rdev);

		else

			radeon_combios_get_power_modes(rdev);

		radeon_pm_print_states(rdev);

		radeon_pm_init_profile(rdev);

	}

	/* set up the internal thermal sensor if applicable */

	ret = radeon_hwmon_init(rdev);

	if (ret)

		return ret;

	if (rdev->pm.num_power_states > 1) {

		DRM_INFO("radeon: power management initialized\n");

	}

	return 0;

}

void radeon_pm_fini(struct radeon_device *rdev)

{

	if (rdev->pm.num_power_states > 1) {

		mutex_lock(&rdev->pm.mutex);

		if (rdev->pm.pm_method == PM_METHOD_PROFILE) {

			rdev->pm.profile = PM_PROFILE_DEFAULT;

			radeon_pm_update_profile(rdev);

			radeon_pm_set_clocks(rdev);

		} else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {

			/* reset default clocks */

			rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;

			rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;

			radeon_pm_set_clocks(rdev);

		}

		mutex_unlock(&rdev->pm.mutex);

//		cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);

    }

	radeon_hwmon_fini(rdev);

}

void radeon_pm_compute_clocks(struct radeon_device *rdev)

{

	struct drm_device *ddev = rdev->ddev;

	struct drm_crtc *crtc;

	struct radeon_crtc *radeon_crtc;

	if (rdev->pm.num_power_states < 2)

		return;

	mutex_lock(&rdev->pm.mutex);

	rdev->pm.active_crtcs = 0;

	rdev->pm.active_crtc_count = 0;

	list_for_each_entry(crtc,

		&ddev->mode_config.crtc_list, head) {

		radeon_crtc = to_radeon_crtc(crtc);

		if (radeon_crtc->enabled) {

			rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);

			rdev->pm.active_crtc_count++;

		}

	}

	if (rdev->pm.pm_method == PM_METHOD_PROFILE) {

		radeon_pm_update_profile(rdev);

		radeon_pm_set_clocks(rdev);

	} else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {

		if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {

			if (rdev->pm.active_crtc_count > 1) {

				if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {

//                   cancel_delayed_work(&rdev->pm.dynpm_idle_work);

					rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;

					rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;

					radeon_pm_get_dynpm_state(rdev);

				radeon_pm_set_clocks(rdev);

					DRM_DEBUG_DRIVER("radeon: dynamic power management deactivated\n");

		}

			} else if (rdev->pm.active_crtc_count == 1) {

		/* TODO: Increase clocks if needed for current mode */

				if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {

					rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;

					rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;

					radeon_pm_get_dynpm_state(rdev);

			radeon_pm_set_clocks(rdev);

//					schedule_delayed_work(&rdev->pm.dynpm_idle_work,

//							   msecs_to_jiffies(RADEON_IDLE_LOOP_MS));

				} else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {

					rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;

//					schedule_delayed_work(&rdev->pm.dynpm_idle_work,

//							   msecs_to_jiffies(RADEON_IDLE_LOOP_MS));

					DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n");

        }

			} else { /* count == 0 */

				if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {

//					cancel_delayed_work(&rdev->pm.dynpm_idle_work);

					rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;

					rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;

					radeon_pm_get_dynpm_state(rdev);

					radeon_pm_set_clocks(rdev);

		}

	}

		}

	}

	mutex_unlock(&rdev->pm.mutex);

}

static bool radeon_pm_in_vbl(struct radeon_device *rdev)

{

	int  crtc, vpos, hpos, vbl_status;

	bool in_vbl = true;

	/* Iterate over all active crtc's. All crtc's must be in vblank,

	 * otherwise return in_vbl == false.

	 */

	for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) {

		if (rdev->pm.active_crtcs & (1 << crtc)) {

			vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, &vpos, &hpos);

			if ((vbl_status & DRM_SCANOUTPOS_VALID) &&

			    !(vbl_status & DRM_SCANOUTPOS_INVBL))

				in_vbl = false;

		}

		}

	return in_vbl;

}

static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)

{

	u32 stat_crtc = 0;

	bool in_vbl = radeon_pm_in_vbl(rdev);

	if (in_vbl == false)

		DRM_DEBUG_DRIVER("not in vbl for pm change %08x at %s\n", stat_crtc,

			 finish ? "exit" : "entry");

	return in_vbl;

}

/*

 * Debugfs info

 */

#if defined(CONFIG_DEBUG_FS)

static int radeon_debugfs_pm_info(struct seq_file *m, void *data)

{

	struct drm_info_node *node = (struct drm_info_node *) m->private;

	struct drm_device *dev = node->minor->dev;

	struct radeon_device *rdev = dev->dev_private;

	seq_printf(m, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk);

	seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));

	seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk);

	if (rdev->asic->get_memory_clock)

		seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));

	if (rdev->pm.current_vddc)

		seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc);

	if (rdev->asic->get_pcie_lanes)

		seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));

	return 0;

}

static struct drm_info_list radeon_pm_info_list[] = {

	{"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},

};

#endif

static int radeon_debugfs_pm_init(struct radeon_device *rdev)

{

#if defined(CONFIG_DEBUG_FS)

	return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));

#else

	return 0;

#endif

}