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 8bce64cdc320..d4d1c39a0e99 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));