diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_pm.c')
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_pm.c | 399 |
1 files changed, 397 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 8bce64c..d4d1c39 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -18,21 +18,413 @@ * OTHER DEALINGS IN THE SOFTWARE. * * Authors: Rafał Miłecki <zajec5@gmail.com> + * Alex Deucher <alexdeucher@gmail.com> */ #include "drmP.h" #include "radeon.h" +#include "avivod.h" -int radeon_debugfs_pm_init(struct radeon_device *rdev); +#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: + if (rdev->flags & RADEON_IS_MOBILITY) { + wanted_types[0] = POWER_STATE_TYPE_POWERSAVE; + wanted_types[1] = POWER_STATE_TYPE_BATTERY; + wanted_count = 2; + } else { + wanted_types[0] = POWER_STATE_TYPE_PERFORMANCE; + wanted_count = 1; + } + break; + case POWER_STATE_TYPE_BATTERY: + if (rdev->flags & RADEON_IS_MOBILITY) { + wanted_types[0] = POWER_STATE_TYPE_BATTERY; + wanted_types[1] = POWER_STATE_TYPE_POWERSAVE; + wanted_count = 2; + } else { + wanted_types[0] = POWER_STATE_TYPE_PERFORMANCE; + wanted_count = 1; + } + 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_MINIMUM: + rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_BATTERY); + rdev->pm.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_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_clock_mode = + radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_HIGH); + break; + case PM_ACTION_NONE: + default: + DRM_ERROR("Requested mode for not defined action\n"); + return; + } + DRM_INFO("Requested: e: %d m: %d p: %d\n", + rdev->pm.requested_clock_mode->sclk, + rdev->pm.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 *_clock_mode are the same, *_power_state are as well */ + if (rdev->pm.requested_clock_mode == rdev->pm.current_clock_mode) + return; + + DRM_INFO("Setting: e: %d m: %d p: %d\n", + rdev->pm.requested_clock_mode->sclk, + rdev->pm.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_clock_mode->sclk); + /* set memory clock */ + + rdev->pm.current_power_state = rdev->pm.requested_power_state; + rdev->pm.current_clock_mode = rdev->pm.requested_clock_mode; +} 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 bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish) +{ + u32 stat_crtc1 = 0, stat_crtc2 = 0; + bool in_vbl = true; + + if (ASIC_IS_AVIVO(rdev)) { + if (rdev->pm.active_crtcs & (1 << 0)) { + stat_crtc1 = RREG32(D1CRTC_STATUS); + if (!(stat_crtc1 & 1)) + in_vbl = false; + } + if (rdev->pm.active_crtcs & (1 << 1)) { + stat_crtc2 = RREG32(D2CRTC_STATUS); + if (!(stat_crtc2 & 1)) + in_vbl = false; + } + } + if (in_vbl == false) + DRM_INFO("not in vbl for pm change %08x %08x at %s\n", stat_crtc1, + stat_crtc2, finish ? "exit" : "entry"); + return in_vbl; +} +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; + } + + /* check if we are in vblank */ + radeon_pm_debug_check_in_vbl(rdev, false); + radeon_set_power_state(rdev); + radeon_pm_debug_check_in_vbl(rdev, true); + 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 */ @@ -44,11 +436,14 @@ static int radeon_debugfs_pm_info(struct seq_file *m, void *data) 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)); + if (rdev->asic->get_pcie_lanes) + seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev)); return 0; } @@ -58,7 +453,7 @@ static struct drm_info_list radeon_pm_info_list[] = { }; #endif -int radeon_debugfs_pm_init(struct radeon_device *rdev) +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)); |