2 * Permission is hereby granted, free of charge, to any person obtaining a
3 * copy of this software and associated documentation files (the "Software"),
4 * to deal in the Software without restriction, including without limitation
5 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
6 * and/or sell copies of the Software, and to permit persons to whom the
7 * Software is furnished to do so, subject to the following conditions:
9 * The above copyright notice and this permission notice shall be included in
10 * all copies or substantial portions of the Software.
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
16 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
17 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
18 * OTHER DEALINGS IN THE SOFTWARE.
20 * Authors: Rafał Miłecki <zajec5@gmail.com>
21 * Alex Deucher <alexdeucher@gmail.com>
26 #define RADEON_IDLE_LOOP_MS 100
27 #define RADEON_RECLOCK_DELAY_MS 200
28 #define RADEON_WAIT_VBLANK_TIMEOUT 200
30 static void radeon_pm_set_clocks_locked(struct radeon_device *rdev);
31 static void radeon_pm_set_clocks(struct radeon_device *rdev);
32 static void radeon_pm_idle_work_handler(struct work_struct *work);
33 static int radeon_debugfs_pm_init(struct radeon_device *rdev);
35 static const char *pm_state_names[4] = {
42 static const char *pm_state_types[5] = {
50 static void radeon_print_power_mode_info(struct radeon_device *rdev)
55 DRM_INFO("%d Power State(s)\n", rdev->pm.num_power_states);
56 for (i = 0; i < rdev->pm.num_power_states; i++) {
57 if (rdev->pm.default_power_state == &rdev->pm.power_state[i])
61 DRM_INFO("State %d %s %s\n", i,
62 pm_state_types[rdev->pm.power_state[i].type],
63 is_default ? "(default)" : "");
64 if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
65 DRM_INFO("\t%d PCIE Lanes\n", rdev->pm.power_state[i].non_clock_info.pcie_lanes);
66 DRM_INFO("\t%d Clock Mode(s)\n", rdev->pm.power_state[i].num_clock_modes);
67 for (j = 0; j < rdev->pm.power_state[i].num_clock_modes; j++) {
68 if (rdev->flags & RADEON_IS_IGP)
69 DRM_INFO("\t\t%d engine: %d\n",
71 rdev->pm.power_state[i].clock_info[j].sclk * 10);
73 DRM_INFO("\t\t%d engine/memory: %d/%d\n",
75 rdev->pm.power_state[i].clock_info[j].sclk * 10,
76 rdev->pm.power_state[i].clock_info[j].mclk * 10);
81 static struct radeon_power_state * radeon_pick_power_state(struct radeon_device *rdev,
82 enum radeon_pm_state_type type)
85 struct radeon_power_state *power_state = NULL;
88 case POWER_STATE_TYPE_DEFAULT:
90 return rdev->pm.default_power_state;
91 case POWER_STATE_TYPE_POWERSAVE:
92 for (i = 0; i < rdev->pm.num_power_states; i++) {
93 if (rdev->pm.power_state[i].type == POWER_STATE_TYPE_POWERSAVE) {
94 power_state = &rdev->pm.power_state[i];
98 if (power_state == NULL) {
99 for (i = 0; i < rdev->pm.num_power_states; i++) {
100 if (rdev->pm.power_state[i].type == POWER_STATE_TYPE_BATTERY) {
101 power_state = &rdev->pm.power_state[i];
107 case POWER_STATE_TYPE_BATTERY:
108 for (i = 0; i < rdev->pm.num_power_states; i++) {
109 if (rdev->pm.power_state[i].type == POWER_STATE_TYPE_BATTERY) {
110 power_state = &rdev->pm.power_state[i];
114 if (power_state == NULL) {
115 for (i = 0; i < rdev->pm.num_power_states; i++) {
116 if (rdev->pm.power_state[i].type == POWER_STATE_TYPE_POWERSAVE) {
117 power_state = &rdev->pm.power_state[i];
123 case POWER_STATE_TYPE_BALANCED:
124 case POWER_STATE_TYPE_PERFORMANCE:
125 for (i = 0; i < rdev->pm.num_power_states; i++) {
126 if (rdev->pm.power_state[i].type == type) {
127 power_state = &rdev->pm.power_state[i];
134 if (power_state == NULL)
135 return rdev->pm.default_power_state;
140 static struct radeon_pm_clock_info * radeon_pick_clock_mode(struct radeon_device *rdev,
141 struct radeon_power_state *power_state,
142 enum radeon_pm_clock_mode_type type)
145 case POWER_MODE_TYPE_DEFAULT:
147 return power_state->default_clock_mode;
148 case POWER_MODE_TYPE_LOW:
149 return &power_state->clock_info[0];
150 case POWER_MODE_TYPE_MID:
151 if (power_state->num_clock_modes > 2)
152 return &power_state->clock_info[1];
154 return &power_state->clock_info[0];
156 case POWER_MODE_TYPE_HIGH:
157 return &power_state->clock_info[power_state->num_clock_modes - 1];
162 static void radeon_get_power_state(struct radeon_device *rdev,
163 enum radeon_pm_action action)
168 rdev->pm.requested_power_state = rdev->pm.current_power_state;
169 rdev->pm.requested_power_state->requested_clock_mode =
170 rdev->pm.requested_power_state->current_clock_mode;
172 case PM_ACTION_MINIMUM:
173 rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_BATTERY);
174 rdev->pm.requested_power_state->requested_clock_mode =
175 radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_LOW);
177 case PM_ACTION_DOWNCLOCK:
178 rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_POWERSAVE);
179 rdev->pm.requested_power_state->requested_clock_mode =
180 radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_MID);
182 case PM_ACTION_UPCLOCK:
183 rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_DEFAULT);
184 rdev->pm.requested_power_state->requested_clock_mode =
185 radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_HIGH);
188 DRM_INFO("Requested: e: %d m: %d p: %d\n",
189 rdev->pm.requested_power_state->requested_clock_mode->sclk,
190 rdev->pm.requested_power_state->requested_clock_mode->mclk,
191 rdev->pm.requested_power_state->non_clock_info.pcie_lanes);
194 static void radeon_set_power_state(struct radeon_device *rdev)
196 if (rdev->pm.requested_power_state == rdev->pm.current_power_state)
199 DRM_INFO("Setting: e: %d m: %d p: %d\n",
200 rdev->pm.requested_power_state->requested_clock_mode->sclk,
201 rdev->pm.requested_power_state->requested_clock_mode->mclk,
202 rdev->pm.requested_power_state->non_clock_info.pcie_lanes);
205 /* set engine clock */
206 radeon_set_engine_clock(rdev, rdev->pm.requested_power_state->requested_clock_mode->sclk);
207 /* set memory clock */
209 rdev->pm.current_power_state = rdev->pm.requested_power_state;
212 int radeon_pm_init(struct radeon_device *rdev)
214 rdev->pm.state = PM_STATE_DISABLED;
215 rdev->pm.planned_action = PM_ACTION_NONE;
216 rdev->pm.downclocked = false;
219 if (rdev->is_atom_bios)
220 radeon_atombios_get_power_modes(rdev);
222 radeon_combios_get_power_modes(rdev);
223 radeon_print_power_mode_info(rdev);
226 if (radeon_debugfs_pm_init(rdev)) {
227 DRM_ERROR("Failed to register debugfs file for PM!\n");
230 INIT_DELAYED_WORK(&rdev->pm.idle_work, radeon_pm_idle_work_handler);
232 if (radeon_dynpm != -1 && radeon_dynpm) {
233 rdev->pm.state = PM_STATE_PAUSED;
234 DRM_INFO("radeon: dynamic power management enabled\n");
237 DRM_INFO("radeon: power management initialized\n");
242 void radeon_pm_compute_clocks(struct radeon_device *rdev)
244 struct drm_device *ddev = rdev->ddev;
245 struct drm_connector *connector;
246 struct radeon_crtc *radeon_crtc;
249 if (rdev->pm.state == PM_STATE_DISABLED)
252 mutex_lock(&rdev->pm.mutex);
254 rdev->pm.active_crtcs = 0;
255 list_for_each_entry(connector,
256 &ddev->mode_config.connector_list, head) {
257 if (connector->encoder &&
258 connector->dpms != DRM_MODE_DPMS_OFF) {
259 radeon_crtc = to_radeon_crtc(connector->encoder->crtc);
260 rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
266 if (rdev->pm.state == PM_STATE_ACTIVE) {
267 cancel_delayed_work(&rdev->pm.idle_work);
269 rdev->pm.state = PM_STATE_PAUSED;
270 rdev->pm.planned_action = PM_ACTION_UPCLOCK;
271 if (rdev->pm.downclocked)
272 radeon_pm_set_clocks(rdev);
274 DRM_DEBUG("radeon: dynamic power management deactivated\n");
276 } else if (count == 1) {
277 /* TODO: Increase clocks if needed for current mode */
279 if (rdev->pm.state == PM_STATE_MINIMUM) {
280 rdev->pm.state = PM_STATE_ACTIVE;
281 rdev->pm.planned_action = PM_ACTION_UPCLOCK;
282 radeon_pm_set_clocks(rdev);
284 queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
285 msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
287 else if (rdev->pm.state == PM_STATE_PAUSED) {
288 rdev->pm.state = PM_STATE_ACTIVE;
289 queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
290 msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
291 DRM_DEBUG("radeon: dynamic power management activated\n");
294 else { /* count == 0 */
295 if (rdev->pm.state != PM_STATE_MINIMUM) {
296 cancel_delayed_work(&rdev->pm.idle_work);
298 rdev->pm.state = PM_STATE_MINIMUM;
299 rdev->pm.planned_action = PM_ACTION_MINIMUM;
300 radeon_pm_set_clocks(rdev);
304 mutex_unlock(&rdev->pm.mutex);
307 static void radeon_pm_set_clocks_locked(struct radeon_device *rdev)
309 /*radeon_fence_wait_last(rdev);*/
310 switch (rdev->pm.planned_action) {
311 case PM_ACTION_UPCLOCK:
312 rdev->pm.downclocked = false;
314 case PM_ACTION_DOWNCLOCK:
315 rdev->pm.downclocked = true;
317 case PM_ACTION_MINIMUM:
320 DRM_ERROR("%s: PM_ACTION_NONE\n", __func__);
323 radeon_set_power_state(rdev);
324 rdev->pm.planned_action = PM_ACTION_NONE;
327 static void radeon_pm_set_clocks(struct radeon_device *rdev)
329 radeon_get_power_state(rdev, rdev->pm.planned_action);
330 mutex_lock(&rdev->cp.mutex);
332 if (rdev->pm.active_crtcs & (1 << 0)) {
333 rdev->pm.req_vblank |= (1 << 0);
334 drm_vblank_get(rdev->ddev, 0);
336 if (rdev->pm.active_crtcs & (1 << 1)) {
337 rdev->pm.req_vblank |= (1 << 1);
338 drm_vblank_get(rdev->ddev, 1);
340 if (rdev->pm.active_crtcs)
341 wait_event_interruptible_timeout(
342 rdev->irq.vblank_queue, 0,
343 msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
344 if (rdev->pm.req_vblank & (1 << 0)) {
345 rdev->pm.req_vblank &= ~(1 << 0);
346 drm_vblank_put(rdev->ddev, 0);
348 if (rdev->pm.req_vblank & (1 << 1)) {
349 rdev->pm.req_vblank &= ~(1 << 1);
350 drm_vblank_put(rdev->ddev, 1);
353 radeon_pm_set_clocks_locked(rdev);
354 mutex_unlock(&rdev->cp.mutex);
357 static void radeon_pm_idle_work_handler(struct work_struct *work)
359 struct radeon_device *rdev;
360 rdev = container_of(work, struct radeon_device,
363 mutex_lock(&rdev->pm.mutex);
364 if (rdev->pm.state == PM_STATE_ACTIVE) {
365 unsigned long irq_flags;
366 int not_processed = 0;
368 read_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
369 if (!list_empty(&rdev->fence_drv.emited)) {
370 struct list_head *ptr;
371 list_for_each(ptr, &rdev->fence_drv.emited) {
372 /* count up to 3, that's enought info */
373 if (++not_processed >= 3)
377 read_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
379 if (not_processed >= 3) { /* should upclock */
380 if (rdev->pm.planned_action == PM_ACTION_DOWNCLOCK) {
381 rdev->pm.planned_action = PM_ACTION_NONE;
382 } else if (rdev->pm.planned_action == PM_ACTION_NONE &&
383 rdev->pm.downclocked) {
384 rdev->pm.planned_action =
386 rdev->pm.action_timeout = jiffies +
387 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
389 } else if (not_processed == 0) { /* should downclock */
390 if (rdev->pm.planned_action == PM_ACTION_UPCLOCK) {
391 rdev->pm.planned_action = PM_ACTION_NONE;
392 } else if (rdev->pm.planned_action == PM_ACTION_NONE &&
393 !rdev->pm.downclocked) {
394 rdev->pm.planned_action =
396 rdev->pm.action_timeout = jiffies +
397 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
401 if (rdev->pm.planned_action != PM_ACTION_NONE &&
402 jiffies > rdev->pm.action_timeout) {
403 radeon_pm_set_clocks(rdev);
406 mutex_unlock(&rdev->pm.mutex);
408 queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
409 msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
415 #if defined(CONFIG_DEBUG_FS)
417 static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
419 struct drm_info_node *node = (struct drm_info_node *) m->private;
420 struct drm_device *dev = node->minor->dev;
421 struct radeon_device *rdev = dev->dev_private;
423 seq_printf(m, "state: %s\n", pm_state_names[rdev->pm.state]);
424 seq_printf(m, "default engine clock: %u0 kHz\n", rdev->clock.default_sclk);
425 seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
426 seq_printf(m, "default memory clock: %u0 kHz\n", rdev->clock.default_mclk);
427 if (rdev->asic->get_memory_clock)
428 seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
433 static struct drm_info_list radeon_pm_info_list[] = {
434 {"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
438 static int radeon_debugfs_pm_init(struct radeon_device *rdev)
440 #if defined(CONFIG_DEBUG_FS)
441 return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));