| /* |
| * 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; |
| struct radeon_power_state *power_state = NULL; |
| |
| switch (type) { |
| case POWER_STATE_TYPE_DEFAULT: |
| default: |
| return rdev->pm.default_power_state; |
| case POWER_STATE_TYPE_POWERSAVE: |
| for (i = 0; i < rdev->pm.num_power_states; i++) { |
| if (rdev->pm.power_state[i].type == POWER_STATE_TYPE_POWERSAVE) { |
| power_state = &rdev->pm.power_state[i]; |
| break; |
| } |
| } |
| if (power_state == NULL) { |
| for (i = 0; i < rdev->pm.num_power_states; i++) { |
| if (rdev->pm.power_state[i].type == POWER_STATE_TYPE_BATTERY) { |
| power_state = &rdev->pm.power_state[i]; |
| break; |
| } |
| } |
| } |
| break; |
| case POWER_STATE_TYPE_BATTERY: |
| for (i = 0; i < rdev->pm.num_power_states; i++) { |
| if (rdev->pm.power_state[i].type == POWER_STATE_TYPE_BATTERY) { |
| power_state = &rdev->pm.power_state[i]; |
| break; |
| } |
| } |
| if (power_state == NULL) { |
| for (i = 0; i < rdev->pm.num_power_states; i++) { |
| if (rdev->pm.power_state[i].type == POWER_STATE_TYPE_POWERSAVE) { |
| power_state = &rdev->pm.power_state[i]; |
| break; |
| } |
| } |
| } |
| break; |
| case POWER_STATE_TYPE_BALANCED: |
| case POWER_STATE_TYPE_PERFORMANCE: |
| for (i = 0; i < rdev->pm.num_power_states; i++) { |
| if (rdev->pm.power_state[i].type == type) { |
| power_state = &rdev->pm.power_state[i]; |
| break; |
| } |
| } |
| break; |
| } |
| |
| if (power_state == NULL) |
| return rdev->pm.default_power_state; |
| |
| return 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 |
| } |