/*
* 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 "drmP.h"
#include "radeon.h"
#define RADEON_IDLE_LOOP_MS 100
#define RADEON_RECLOCK_DELAY_MS 200
#define RADEON_WAIT_VBLANK_TIMEOUT 200
static void radeon_pm_set_clocks_locked(struct radeon_device *rdev);
static void radeon_pm_set_clocks(struct radeon_device *rdev);
static void radeon_pm_idle_work_handler(struct work_struct *work);
static int radeon_debugfs_pm_init(struct radeon_device *rdev);
static const char *pm_state_names[4] = {
"PM_STATE_DISABLED",
"PM_STATE_MINIMUM",
"PM_STATE_PAUSED",
"PM_STATE_ACTIVE"
};
static const char *pm_state_types[5] = {
"Default",
"Powersave",
"Battery",
"Balanced",
"Performance",
};
static void radeon_print_power_mode_info(struct radeon_device *rdev)
{
int i, j;
bool is_default;
DRM_INFO("%d Power State(s)\n", rdev->pm.num_power_states);
for (i = 0; i < rdev->pm.num_power_states; i++) {
if (rdev->pm.default_power_state == &rdev->pm.power_state[i])
is_default = true;
else
is_default = false;
DRM_INFO("State %d %s %s\n", i,
pm_state_types[rdev->pm.power_state[i].type],
is_default ? "(default)" : "");
if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
DRM_INFO("\t%d PCIE Lanes\n", rdev->pm.power_state[i].non_clock_info.pcie_lanes);
DRM_INFO("\t%d Clock Mode(s)\n", rdev->pm.power_state[i].num_clock_modes);
for (j = 0; j < rdev->pm.power_state[i].num_clock_modes; j++) {
if (rdev->flags & RADEON_IS_IGP)
DRM_INFO("\t\t%d engine: %d\n",
j,
rdev->pm.power_state[i].clock_info[j].sclk * 10);
else
DRM_INFO("\t\t%d engine/memory: %d/%d\n",
j,
rdev->pm.power_state[i].clock_info[j].sclk * 10,
rdev->pm.power_state[i].clock_info[j].mclk * 10);
}
}
}
static struct radeon_power_state * radeon_pick_power_state(struct radeon_device *rdev,
enum radeon_pm_state_type type)
{
int i, j;
enum radeon_pm_state_type wanted_types[2];
int wanted_count;
switch (type) {
case POWER_STATE_TYPE_DEFAULT:
default:
return rdev->pm.default_power_state;
case POWER_STATE_TYPE_POWERSAVE:
wanted_types[0] = POWER_STATE_TYPE_POWERSAVE;
wanted_types[1] = POWER_STATE_TYPE_BATTERY;
wanted_count = 2;
break;
case POWER_STATE_TYPE_BATTERY:
wanted_types[0] = POWER_STATE_TYPE_BATTERY;
wanted_types[1] = POWER_STATE_TYPE_POWERSAVE;
wanted_count = 2;
break;
case POWER_STATE_TYPE_BALANCED:
case POWER_STATE_TYPE_PERFORMANCE:
wanted_types[0] = type;
wanted_count = 1;
break;
}
for (i = 0; i < wanted_count; i++) {
for (j = 0; j < rdev->pm.num_power_states; j++) {
if (rdev->pm.power_state[j].type == wanted_types[i])
return &rdev->pm.power_state[j];
}
}
return rdev->pm.default_power_state;
}
static struct radeon_pm_clock_info * radeon_pick_clock_mode(struct radeon_device *rdev,
struct radeon_power_state *power_state,
enum radeon_pm_clock_mode_type type)
{
switch (type) {
case POWER_MODE_TYPE_DEFAULT:
default:
return power_state->default_clock_mode;
case POWER_MODE_TYPE_LOW:
return &power_state->clock_info[0];
case POWER_MODE_TYPE_MID:
if (power_state->num_clock_modes > 2)
return &power_state->clock_info[1];
else
return &power_state->clock_info[0];
break;
case POWER_MODE_TYPE_HIGH:
return &power_state->clock_info[power_state->num_clock_modes - 1];
}
}
static void radeon_get_power_state(struct radeon_device *rdev,
enum radeon_pm_action action)
{
switch (action) {
case PM_ACTION_NONE:
default:
rdev->pm.requested_power_state = rdev->pm.current_power_state;
rdev->pm.requested_power_state->requested_clock_mode =
rdev->pm.requested_power_state->current_clock_mode;
break;
case PM_ACTION_MINIMUM:
rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_BATTERY);
rdev->pm.requested_power_state->requested_clock_mode =
radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_LOW);
break;
case PM_ACTION_DOWNCLOCK:
rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_POWERSAVE);
rdev->pm.requested_power_state->requested_clock_mode =
radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_MID);
break;
case PM_ACTION_UPCLOCK:
rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_DEFAULT);
rdev->pm.requested_power_state->requested_clock_mode =
radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_HIGH);
break;
}
DRM_INFO("Requested: e: %d m: %d p: %d\n",
rdev->pm.requested_power_state->requested_clock_mode->sclk,
rdev->pm.requested_power_state->requested_clock_mode->mclk,
rdev->pm.requested_power_state->non_clock_info.pcie_lanes);
}
static void radeon_set_power_state(struct radeon_device *rdev)
{
if (rdev->pm.requested_power_state == rdev->pm.current_power_state)
return;
DRM_INFO("Setting: e: %d m: %d p: %d\n",
rdev->pm.requested_power_state->requested_clock_mode->sclk,
rdev->pm.requested_power_state->requested_clock_mode->mclk,
rdev->pm.requested_power_state->non_clock_info.pcie_lanes);
/* set pcie lanes */
/* set voltage */
/* set engine clock */
radeon_set_engine_clock(rdev, rdev->pm.requested_power_state->requested_clock_mode->sclk);
/* set memory clock */
rdev->pm.current_power_state = rdev->pm.requested_power_state;
}
int radeon_pm_init(struct radeon_device *rdev)
{
rdev->pm.state = PM_STATE_DISABLED;
rdev->pm.planned_action = PM_ACTION_NONE;
rdev->pm.downclocked = false;
if (rdev->bios) {
if (rdev->is_atom_bios)
radeon_atombios_get_power_modes(rdev);
else
radeon_combios_get_power_modes(rdev);
radeon_print_power_mode_info(rdev);
}
if (radeon_debugfs_pm_init(rdev)) {
DRM_ERROR("Failed to register debugfs file for PM!\n");
}
INIT_DELAYED_WORK(&rdev->pm.idle_work, radeon_pm_idle_work_handler);
if (radeon_dynpm != -1 && radeon_dynpm) {
rdev->pm.state = PM_STATE_PAUSED;
DRM_INFO("radeon: dynamic power management enabled\n");
}
DRM_INFO("radeon: power management initialized\n");
return 0;
}
void radeon_pm_compute_clocks(struct radeon_device *rdev)
{
struct drm_device *ddev = rdev->ddev;
struct drm_connector *connector;
struct radeon_crtc *radeon_crtc;
int count = 0;
if (rdev->pm.state == PM_STATE_DISABLED)
return;
mutex_lock(&rdev->pm.mutex);
rdev->pm.active_crtcs = 0;
list_for_each_entry(connector,
&ddev->mode_config.connector_list, head) {
if (connector->encoder &&
connector->dpms != DRM_MODE_DPMS_OFF) {
radeon_crtc = to_radeon_crtc(connector->encoder->crtc);
rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
++count;
}
}
if (count > 1) {
if (rdev->pm.state == PM_STATE_ACTIVE) {
cancel_delayed_work(&rdev->pm.idle_work);
rdev->pm.state = PM_STATE_PAUSED;
rdev->pm.planned_action = PM_ACTION_UPCLOCK;
if (rdev->pm.downclocked)
radeon_pm_set_clocks(rdev);
DRM_DEBUG("radeon: dynamic power management deactivated\n");
}
} else if (count == 1) {
/* TODO: Increase clocks if needed for current mode */
if (rdev->pm.state == PM_STATE_MINIMUM) {
rdev->pm.state = PM_STATE_ACTIVE;
rdev->pm.planned_action = PM_ACTION_UPCLOCK;
radeon_pm_set_clocks(rdev);
queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
}
else if (rdev->pm.state == PM_STATE_PAUSED) {
rdev->pm.state = PM_STATE_ACTIVE;
queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
DRM_DEBUG("radeon: dynamic power management activated\n");
}
}
else { /* count == 0 */
if (rdev->pm.state != PM_STATE_MINIMUM) {
cancel_delayed_work(&rdev->pm.idle_work);
rdev->pm.state = PM_STATE_MINIMUM;
rdev->pm.planned_action = PM_ACTION_MINIMUM;
radeon_pm_set_clocks(rdev);
}
}
mutex_unlock(&rdev->pm.mutex);
}
static void radeon_pm_set_clocks_locked(struct radeon_device *rdev)
{
/*radeon_fence_wait_last(rdev);*/
switch (rdev->pm.planned_action) {
case PM_ACTION_UPCLOCK:
rdev->pm.downclocked = false;
break;
case PM_ACTION_DOWNCLOCK:
rdev->pm.downclocked = true;
break;
case PM_ACTION_MINIMUM:
break;
case PM_ACTION_NONE:
DRM_ERROR("%s: PM_ACTION_NONE\n", __func__);
break;
}
radeon_set_power_state(rdev);
rdev->pm.planned_action = PM_ACTION_NONE;
}
static void radeon_pm_set_clocks(struct radeon_device *rdev)
{
radeon_get_power_state(rdev, rdev->pm.planned_action);
mutex_lock(&rdev->cp.mutex);
if (rdev->pm.active_crtcs & (1 << 0)) {
rdev->pm.req_vblank |= (1 << 0);
drm_vblank_get(rdev->ddev, 0);
}
if (rdev->pm.active_crtcs & (1 << 1)) {
rdev->pm.req_vblank |= (1 << 1);
drm_vblank_get(rdev->ddev, 1);
}
if (rdev->pm.active_crtcs)
wait_event_interruptible_timeout(
rdev->irq.vblank_queue, 0,
msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
if (rdev->pm.req_vblank & (1 << 0)) {
rdev->pm.req_vblank &= ~(1 << 0);
drm_vblank_put(rdev->ddev, 0);
}
if (rdev->pm.req_vblank & (1 << 1)) {
rdev->pm.req_vblank &= ~(1 << 1);
drm_vblank_put(rdev->ddev, 1);
}
radeon_pm_set_clocks_locked(rdev);
mutex_unlock(&rdev->cp.mutex);
}
static void radeon_pm_idle_work_handler(struct work_struct *work)
{
struct radeon_device *rdev;
rdev = container_of(work, struct radeon_device,
pm.idle_work.work);
mutex_lock(&rdev->pm.mutex);
if (rdev->pm.state == PM_STATE_ACTIVE) {
unsigned long irq_flags;
int not_processed = 0;
read_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
if (!list_empty(&rdev->fence_drv.emited)) {
struct list_head *ptr;
list_for_each(ptr, &rdev->fence_drv.emited) {
/* count up to 3, that's enought info */
if (++not_processed >= 3)
break;
}
}
read_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
if (not_processed >= 3) { /* should upclock */
if (rdev->pm.planned_action == PM_ACTION_DOWNCLOCK) {
rdev->pm.planned_action = PM_ACTION_NONE;
} else if (rdev->pm.planned_action == PM_ACTION_NONE &&
rdev->pm.downclocked) {
rdev->pm.planned_action =
PM_ACTION_UPCLOCK;
rdev->pm.action_timeout = jiffies +
msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
}
} else if (not_processed == 0) { /* should downclock */
if (rdev->pm.planned_action == PM_ACTION_UPCLOCK) {
rdev->pm.planned_action = PM_ACTION_NONE;
} else if (rdev->pm.planned_action == PM_ACTION_NONE &&
!rdev->pm.downclocked) {
rdev->pm.planned_action =
PM_ACTION_DOWNCLOCK;
rdev->pm.action_timeout = jiffies +
msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
}
}
if (rdev->pm.planned_action != PM_ACTION_NONE &&
jiffies > rdev->pm.action_timeout) {
radeon_pm_set_clocks(rdev);
}
}
mutex_unlock(&rdev->pm.mutex);
queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
}
/*
* 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, "state: %s\n", pm_state_names[rdev->pm.state]);
seq_printf(m, "default engine clock: %u0 kHz\n", rdev->clock.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->clock.default_mclk);
if (rdev->asic->get_memory_clock)
seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(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
}
