diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_pm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_pm.c | 874 |
1 files changed, 874 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c new file mode 100644 index 0000000..788c64c --- /dev/null +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -0,0 +1,874 @@ +/* + * 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 <drm/drmP.h> +#include "radeon.h" +#include "avivod.h" +#include "atom.h" +#include <linux/power_supply.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> + +#define RADEON_IDLE_LOOP_MS 100 +#define RADEON_RECLOCK_DELAY_MS 200 +#define RADEON_WAIT_VBLANK_TIMEOUT 200 + +static const char *radeon_pm_state_type_name[5] = { + "", + "Powersave", + "Battery", + "Balanced", + "Performance", +}; + +static void radeon_dynpm_idle_work_handler(struct work_struct *work); +static int radeon_debugfs_pm_init(struct radeon_device *rdev); +static bool radeon_pm_in_vbl(struct radeon_device *rdev); +static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish); +static void radeon_pm_update_profile(struct radeon_device *rdev); +static void radeon_pm_set_clocks(struct radeon_device *rdev); + +int radeon_pm_get_type_index(struct radeon_device *rdev, + enum radeon_pm_state_type ps_type, + int instance) +{ + int i; + int found_instance = -1; + + for (i = 0; i < rdev->pm.num_power_states; i++) { + if (rdev->pm.power_state[i].type == ps_type) { + found_instance++; + if (found_instance == instance) + return i; + } + } + /* return default if no match */ + return rdev->pm.default_power_state_index; +} + +void radeon_pm_acpi_event_handler(struct radeon_device *rdev) +{ + if (rdev->pm.pm_method == PM_METHOD_PROFILE) { + if (rdev->pm.profile == PM_PROFILE_AUTO) { + mutex_lock(&rdev->pm.mutex); + radeon_pm_update_profile(rdev); + radeon_pm_set_clocks(rdev); + mutex_unlock(&rdev->pm.mutex); + } + } +} + +static void radeon_pm_update_profile(struct radeon_device *rdev) +{ + switch (rdev->pm.profile) { + case PM_PROFILE_DEFAULT: + rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX; + break; + case PM_PROFILE_AUTO: + if (power_supply_is_system_supplied() > 0) { + if (rdev->pm.active_crtc_count > 1) + rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX; + else + rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX; + } else { + if (rdev->pm.active_crtc_count > 1) + rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX; + else + rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX; + } + break; + case PM_PROFILE_LOW: + if (rdev->pm.active_crtc_count > 1) + rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX; + else + rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX; + break; + case PM_PROFILE_MID: + if (rdev->pm.active_crtc_count > 1) + rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX; + else + rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX; + break; + case PM_PROFILE_HIGH: + if (rdev->pm.active_crtc_count > 1) + rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX; + else + rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX; + break; + } + + if (rdev->pm.active_crtc_count == 0) { + rdev->pm.requested_power_state_index = + rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx; + rdev->pm.requested_clock_mode_index = + rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx; + } else { + rdev->pm.requested_power_state_index = + rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx; + rdev->pm.requested_clock_mode_index = + rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx; + } +} + +static void radeon_unmap_vram_bos(struct radeon_device *rdev) +{ + struct radeon_bo *bo, *n; + + if (list_empty(&rdev->gem.objects)) + return; + + list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) { + if (bo->tbo.mem.mem_type == TTM_PL_VRAM) + ttm_bo_unmap_virtual(&bo->tbo); + } +} + +static void radeon_sync_with_vblank(struct radeon_device *rdev) +{ + if (rdev->pm.active_crtcs) { + rdev->pm.vblank_sync = false; + wait_event_timeout( + rdev->irq.vblank_queue, rdev->pm.vblank_sync, + msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT)); + } +} + +static void radeon_set_power_state(struct radeon_device *rdev) +{ + u32 sclk, mclk; + bool misc_after = false; + + if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) && + (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index)) + return; + + if (radeon_gui_idle(rdev)) { + sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index]. + clock_info[rdev->pm.requested_clock_mode_index].sclk; + if (sclk > rdev->pm.default_sclk) + sclk = rdev->pm.default_sclk; + + /* starting with BTC, there is one state that is used for both + * MH and SH. Difference is that we always use the high clock index for + * mclk and vddci. + */ + if ((rdev->pm.pm_method == PM_METHOD_PROFILE) && + (rdev->family >= CHIP_BARTS) && + rdev->pm.active_crtc_count && + ((rdev->pm.profile_index == PM_PROFILE_MID_MH_IDX) || + (rdev->pm.profile_index == PM_PROFILE_LOW_MH_IDX))) + mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index]. + clock_info[rdev->pm.profiles[PM_PROFILE_HIGH_MH_IDX].dpms_on_cm_idx].mclk; + else + mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index]. + clock_info[rdev->pm.requested_clock_mode_index].mclk; + + if (mclk > rdev->pm.default_mclk) + mclk = rdev->pm.default_mclk; + + /* upvolt before raising clocks, downvolt after lowering clocks */ + if (sclk < rdev->pm.current_sclk) + misc_after = true; + + radeon_sync_with_vblank(rdev); + + if (rdev->pm.pm_method == PM_METHOD_DYNPM) { + if (!radeon_pm_in_vbl(rdev)) + return; + } + + radeon_pm_prepare(rdev); + + if (!misc_after) + /* voltage, pcie lanes, etc.*/ + radeon_pm_misc(rdev); + + /* set engine clock */ + if (sclk != rdev->pm.current_sclk) { + radeon_pm_debug_check_in_vbl(rdev, false); + radeon_set_engine_clock(rdev, sclk); + radeon_pm_debug_check_in_vbl(rdev, true); + rdev->pm.current_sclk = sclk; + DRM_DEBUG_DRIVER("Setting: e: %d\n", sclk); + } + + /* set memory clock */ + if (rdev->asic->pm.set_memory_clock && (mclk != rdev->pm.current_mclk)) { + radeon_pm_debug_check_in_vbl(rdev, false); + radeon_set_memory_clock(rdev, mclk); + radeon_pm_debug_check_in_vbl(rdev, true); + rdev->pm.current_mclk = mclk; + DRM_DEBUG_DRIVER("Setting: m: %d\n", mclk); + } + + if (misc_after) + /* voltage, pcie lanes, etc.*/ + radeon_pm_misc(rdev); + + radeon_pm_finish(rdev); + + rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index; + rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index; + } else + DRM_DEBUG_DRIVER("pm: GUI not idle!!!\n"); +} + +static void radeon_pm_set_clocks(struct radeon_device *rdev) +{ + int i, r; + + /* no need to take locks, etc. if nothing's going to change */ + if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) && + (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index)) + return; + + mutex_lock(&rdev->ddev->struct_mutex); + down_write(&rdev->pm.mclk_lock); + mutex_lock(&rdev->ring_lock); + + /* wait for the rings to drain */ + for (i = 0; i < RADEON_NUM_RINGS; i++) { + struct radeon_ring *ring = &rdev->ring[i]; + if (!ring->ready) { + continue; + } + r = radeon_fence_wait_empty_locked(rdev, i); + if (r) { + /* needs a GPU reset dont reset here */ + mutex_unlock(&rdev->ring_lock); + up_write(&rdev->pm.mclk_lock); + mutex_unlock(&rdev->ddev->struct_mutex); + return; + } + } + + radeon_unmap_vram_bos(rdev); + + if (rdev->irq.installed) { + for (i = 0; i < rdev->num_crtc; i++) { + if (rdev->pm.active_crtcs & (1 << i)) { + rdev->pm.req_vblank |= (1 << i); + drm_vblank_get(rdev->ddev, i); + } + } + } + + radeon_set_power_state(rdev); + + if (rdev->irq.installed) { + for (i = 0; i < rdev->num_crtc; i++) { + if (rdev->pm.req_vblank & (1 << i)) { + rdev->pm.req_vblank &= ~(1 << i); + drm_vblank_put(rdev->ddev, i); + } + } + } + + /* update display watermarks based on new power state */ + radeon_update_bandwidth_info(rdev); + if (rdev->pm.active_crtc_count) + radeon_bandwidth_update(rdev); + + rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE; + + mutex_unlock(&rdev->ring_lock); + up_write(&rdev->pm.mclk_lock); + mutex_unlock(&rdev->ddev->struct_mutex); +} + +static void radeon_pm_print_states(struct radeon_device *rdev) +{ + int i, j; + struct radeon_power_state *power_state; + struct radeon_pm_clock_info *clock_info; + + DRM_DEBUG_DRIVER("%d Power State(s)\n", rdev->pm.num_power_states); + for (i = 0; i < rdev->pm.num_power_states; i++) { + power_state = &rdev->pm.power_state[i]; + DRM_DEBUG_DRIVER("State %d: %s\n", i, + radeon_pm_state_type_name[power_state->type]); + if (i == rdev->pm.default_power_state_index) + DRM_DEBUG_DRIVER("\tDefault"); + if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP)) + DRM_DEBUG_DRIVER("\t%d PCIE Lanes\n", power_state->pcie_lanes); + if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY) + DRM_DEBUG_DRIVER("\tSingle display only\n"); + DRM_DEBUG_DRIVER("\t%d Clock Mode(s)\n", power_state->num_clock_modes); + for (j = 0; j < power_state->num_clock_modes; j++) { + clock_info = &(power_state->clock_info[j]); + if (rdev->flags & RADEON_IS_IGP) + DRM_DEBUG_DRIVER("\t\t%d e: %d\n", + j, + clock_info->sclk * 10); + else + DRM_DEBUG_DRIVER("\t\t%d e: %d\tm: %d\tv: %d\n", + j, + clock_info->sclk * 10, + clock_info->mclk * 10, + clock_info->voltage.voltage); + } + } +} + +static ssize_t radeon_get_pm_profile(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev)); + struct radeon_device *rdev = ddev->dev_private; + int cp = rdev->pm.profile; + + return snprintf(buf, PAGE_SIZE, "%s\n", + (cp == PM_PROFILE_AUTO) ? "auto" : + (cp == PM_PROFILE_LOW) ? "low" : + (cp == PM_PROFILE_MID) ? "mid" : + (cp == PM_PROFILE_HIGH) ? "high" : "default"); +} + +static ssize_t radeon_set_pm_profile(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev)); + struct radeon_device *rdev = ddev->dev_private; + + mutex_lock(&rdev->pm.mutex); + if (rdev->pm.pm_method == PM_METHOD_PROFILE) { + if (strncmp("default", buf, strlen("default")) == 0) + rdev->pm.profile = PM_PROFILE_DEFAULT; + else if (strncmp("auto", buf, strlen("auto")) == 0) + rdev->pm.profile = PM_PROFILE_AUTO; + else if (strncmp("low", buf, strlen("low")) == 0) + rdev->pm.profile = PM_PROFILE_LOW; + else if (strncmp("mid", buf, strlen("mid")) == 0) + rdev->pm.profile = PM_PROFILE_MID; + else if (strncmp("high", buf, strlen("high")) == 0) + rdev->pm.profile = PM_PROFILE_HIGH; + else { + count = -EINVAL; + goto fail; + } + radeon_pm_update_profile(rdev); + radeon_pm_set_clocks(rdev); + } else + count = -EINVAL; + +fail: + mutex_unlock(&rdev->pm.mutex); + + return count; +} + +static ssize_t radeon_get_pm_method(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev)); + struct radeon_device *rdev = ddev->dev_private; + int pm = rdev->pm.pm_method; + + return snprintf(buf, PAGE_SIZE, "%s\n", + (pm == PM_METHOD_DYNPM) ? "dynpm" : "profile"); +} + +static ssize_t radeon_set_pm_method(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev)); + struct radeon_device *rdev = ddev->dev_private; + + + if (strncmp("dynpm", buf, strlen("dynpm")) == 0) { + mutex_lock(&rdev->pm.mutex); + rdev->pm.pm_method = PM_METHOD_DYNPM; + rdev->pm.dynpm_state = DYNPM_STATE_PAUSED; + rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT; + mutex_unlock(&rdev->pm.mutex); + } else if (strncmp("profile", buf, strlen("profile")) == 0) { + mutex_lock(&rdev->pm.mutex); + /* disable dynpm */ + rdev->pm.dynpm_state = DYNPM_STATE_DISABLED; + rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE; + rdev->pm.pm_method = PM_METHOD_PROFILE; + mutex_unlock(&rdev->pm.mutex); + cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work); + } else { + count = -EINVAL; + goto fail; + } + radeon_pm_compute_clocks(rdev); +fail: + return count; +} + +static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile); +static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method); + +static ssize_t radeon_hwmon_show_temp(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev)); + struct radeon_device *rdev = ddev->dev_private; + int temp; + + switch (rdev->pm.int_thermal_type) { + case THERMAL_TYPE_RV6XX: + temp = rv6xx_get_temp(rdev); + break; + case THERMAL_TYPE_RV770: + temp = rv770_get_temp(rdev); + break; + case THERMAL_TYPE_EVERGREEN: + case THERMAL_TYPE_NI: + temp = evergreen_get_temp(rdev); + break; + case THERMAL_TYPE_SUMO: + temp = sumo_get_temp(rdev); + break; + case THERMAL_TYPE_SI: + temp = si_get_temp(rdev); + break; + default: + temp = 0; + break; + } + + return snprintf(buf, PAGE_SIZE, "%d\n", temp); +} + +static ssize_t radeon_hwmon_show_name(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "radeon\n"); +} + +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0); +static SENSOR_DEVICE_ATTR(name, S_IRUGO, radeon_hwmon_show_name, NULL, 0); + +static struct attribute *hwmon_attributes[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_name.dev_attr.attr, + NULL +}; + +static const struct attribute_group hwmon_attrgroup = { + .attrs = hwmon_attributes, +}; + +static int radeon_hwmon_init(struct radeon_device *rdev) +{ + int err = 0; + + rdev->pm.int_hwmon_dev = NULL; + + switch (rdev->pm.int_thermal_type) { + case THERMAL_TYPE_RV6XX: + case THERMAL_TYPE_RV770: + case THERMAL_TYPE_EVERGREEN: + case THERMAL_TYPE_NI: + case THERMAL_TYPE_SUMO: + case THERMAL_TYPE_SI: + /* No support for TN yet */ + if (rdev->family == CHIP_ARUBA) + return err; + rdev->pm.int_hwmon_dev = hwmon_device_register(rdev->dev); + if (IS_ERR(rdev->pm.int_hwmon_dev)) { + err = PTR_ERR(rdev->pm.int_hwmon_dev); + dev_err(rdev->dev, + "Unable to register hwmon device: %d\n", err); + break; + } + dev_set_drvdata(rdev->pm.int_hwmon_dev, rdev->ddev); + err = sysfs_create_group(&rdev->pm.int_hwmon_dev->kobj, + &hwmon_attrgroup); + if (err) { + dev_err(rdev->dev, + "Unable to create hwmon sysfs file: %d\n", err); + hwmon_device_unregister(rdev->dev); + } + break; + default: + break; + } + + return err; +} + +static void radeon_hwmon_fini(struct radeon_device *rdev) +{ + if (rdev->pm.int_hwmon_dev) { + sysfs_remove_group(&rdev->pm.int_hwmon_dev->kobj, &hwmon_attrgroup); + hwmon_device_unregister(rdev->pm.int_hwmon_dev); + } +} + +void radeon_pm_suspend(struct radeon_device *rdev) +{ + mutex_lock(&rdev->pm.mutex); + if (rdev->pm.pm_method == PM_METHOD_DYNPM) { + if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) + rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED; + } + mutex_unlock(&rdev->pm.mutex); + + cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work); +} + +void radeon_pm_resume(struct radeon_device *rdev) +{ + /* set up the default clocks if the MC ucode is loaded */ + if ((rdev->family >= CHIP_BARTS) && + (rdev->family <= CHIP_CAYMAN) && + rdev->mc_fw) { + if (rdev->pm.default_vddc) + radeon_atom_set_voltage(rdev, rdev->pm.default_vddc, + SET_VOLTAGE_TYPE_ASIC_VDDC); + if (rdev->pm.default_vddci) + radeon_atom_set_voltage(rdev, rdev->pm.default_vddci, + SET_VOLTAGE_TYPE_ASIC_VDDCI); + if (rdev->pm.default_sclk) + radeon_set_engine_clock(rdev, rdev->pm.default_sclk); + if (rdev->pm.default_mclk) + radeon_set_memory_clock(rdev, rdev->pm.default_mclk); + } + /* asic init will reset the default power state */ + mutex_lock(&rdev->pm.mutex); + rdev->pm.current_power_state_index = rdev->pm.default_power_state_index; + rdev->pm.current_clock_mode_index = 0; + rdev->pm.current_sclk = rdev->pm.default_sclk; + rdev->pm.current_mclk = rdev->pm.default_mclk; + rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage; + rdev->pm.current_vddci = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.vddci; + if (rdev->pm.pm_method == PM_METHOD_DYNPM + && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) { + rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE; + schedule_delayed_work(&rdev->pm.dynpm_idle_work, + msecs_to_jiffies(RADEON_IDLE_LOOP_MS)); + } + mutex_unlock(&rdev->pm.mutex); + radeon_pm_compute_clocks(rdev); +} + +int radeon_pm_init(struct radeon_device *rdev) +{ + int ret; + + /* default to profile method */ + rdev->pm.pm_method = PM_METHOD_PROFILE; + rdev->pm.profile = PM_PROFILE_DEFAULT; + rdev->pm.dynpm_state = DYNPM_STATE_DISABLED; + rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE; + rdev->pm.dynpm_can_upclock = true; + rdev->pm.dynpm_can_downclock = true; + rdev->pm.default_sclk = rdev->clock.default_sclk; + rdev->pm.default_mclk = rdev->clock.default_mclk; + rdev->pm.current_sclk = rdev->clock.default_sclk; + rdev->pm.current_mclk = rdev->clock.default_mclk; + rdev->pm.int_thermal_type = THERMAL_TYPE_NONE; + + if (rdev->bios) { + if (rdev->is_atom_bios) + radeon_atombios_get_power_modes(rdev); + else + radeon_combios_get_power_modes(rdev); + radeon_pm_print_states(rdev); + radeon_pm_init_profile(rdev); + /* set up the default clocks if the MC ucode is loaded */ + if ((rdev->family >= CHIP_BARTS) && + (rdev->family <= CHIP_CAYMAN) && + rdev->mc_fw) { + if (rdev->pm.default_vddc) + radeon_atom_set_voltage(rdev, rdev->pm.default_vddc, + SET_VOLTAGE_TYPE_ASIC_VDDC); + if (rdev->pm.default_vddci) + radeon_atom_set_voltage(rdev, rdev->pm.default_vddci, + SET_VOLTAGE_TYPE_ASIC_VDDCI); + if (rdev->pm.default_sclk) + radeon_set_engine_clock(rdev, rdev->pm.default_sclk); + if (rdev->pm.default_mclk) + radeon_set_memory_clock(rdev, rdev->pm.default_mclk); + } + } + + /* set up the internal thermal sensor if applicable */ + ret = radeon_hwmon_init(rdev); + if (ret) + return ret; + + INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler); + + if (rdev->pm.num_power_states > 1) { + /* where's the best place to put these? */ + ret = device_create_file(rdev->dev, &dev_attr_power_profile); + if (ret) + DRM_ERROR("failed to create device file for power profile\n"); + ret = device_create_file(rdev->dev, &dev_attr_power_method); + if (ret) + DRM_ERROR("failed to create device file for power method\n"); + + if (radeon_debugfs_pm_init(rdev)) { + DRM_ERROR("Failed to register debugfs file for PM!\n"); + } + + DRM_INFO("radeon: power management initialized\n"); + } + + return 0; +} + +void radeon_pm_fini(struct radeon_device *rdev) +{ + if (rdev->pm.num_power_states > 1) { + mutex_lock(&rdev->pm.mutex); + if (rdev->pm.pm_method == PM_METHOD_PROFILE) { + rdev->pm.profile = PM_PROFILE_DEFAULT; + radeon_pm_update_profile(rdev); + radeon_pm_set_clocks(rdev); + } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) { + /* reset default clocks */ + rdev->pm.dynpm_state = DYNPM_STATE_DISABLED; + rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT; + radeon_pm_set_clocks(rdev); + } + mutex_unlock(&rdev->pm.mutex); + + cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work); + + device_remove_file(rdev->dev, &dev_attr_power_profile); + device_remove_file(rdev->dev, &dev_attr_power_method); + } + + if (rdev->pm.power_state) + kfree(rdev->pm.power_state); + + radeon_hwmon_fini(rdev); +} + +void radeon_pm_compute_clocks(struct radeon_device *rdev) +{ + struct drm_device *ddev = rdev->ddev; + struct drm_crtc *crtc; + struct radeon_crtc *radeon_crtc; + + if (rdev->pm.num_power_states < 2) + return; + + mutex_lock(&rdev->pm.mutex); + + rdev->pm.active_crtcs = 0; + rdev->pm.active_crtc_count = 0; + list_for_each_entry(crtc, + &ddev->mode_config.crtc_list, head) { + radeon_crtc = to_radeon_crtc(crtc); + if (radeon_crtc->enabled) { + rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id); + rdev->pm.active_crtc_count++; + } + } + + if (rdev->pm.pm_method == PM_METHOD_PROFILE) { + radeon_pm_update_profile(rdev); + radeon_pm_set_clocks(rdev); + } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) { + if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) { + if (rdev->pm.active_crtc_count > 1) { + if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) { + cancel_delayed_work(&rdev->pm.dynpm_idle_work); + + rdev->pm.dynpm_state = DYNPM_STATE_PAUSED; + rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT; + radeon_pm_get_dynpm_state(rdev); + radeon_pm_set_clocks(rdev); + + DRM_DEBUG_DRIVER("radeon: dynamic power management deactivated\n"); + } + } else if (rdev->pm.active_crtc_count == 1) { + /* TODO: Increase clocks if needed for current mode */ + + if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) { + rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE; + rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK; + radeon_pm_get_dynpm_state(rdev); + radeon_pm_set_clocks(rdev); + + schedule_delayed_work(&rdev->pm.dynpm_idle_work, + msecs_to_jiffies(RADEON_IDLE_LOOP_MS)); + } else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) { + rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE; + schedule_delayed_work(&rdev->pm.dynpm_idle_work, + msecs_to_jiffies(RADEON_IDLE_LOOP_MS)); + DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n"); + } + } else { /* count == 0 */ + if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) { + cancel_delayed_work(&rdev->pm.dynpm_idle_work); + + rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM; + rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM; + radeon_pm_get_dynpm_state(rdev); + radeon_pm_set_clocks(rdev); + } + } + } + } + + mutex_unlock(&rdev->pm.mutex); +} + +static bool radeon_pm_in_vbl(struct radeon_device *rdev) +{ + int crtc, vpos, hpos, vbl_status; + bool in_vbl = true; + + /* Iterate over all active crtc's. All crtc's must be in vblank, + * otherwise return in_vbl == false. + */ + for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) { + if (rdev->pm.active_crtcs & (1 << crtc)) { + vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, &vpos, &hpos); + if ((vbl_status & DRM_SCANOUTPOS_VALID) && + !(vbl_status & DRM_SCANOUTPOS_INVBL)) + in_vbl = false; + } + } + + return in_vbl; +} + +static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish) +{ + u32 stat_crtc = 0; + bool in_vbl = radeon_pm_in_vbl(rdev); + + if (in_vbl == false) + DRM_DEBUG_DRIVER("not in vbl for pm change %08x at %s\n", stat_crtc, + finish ? "exit" : "entry"); + return in_vbl; +} + +static void radeon_dynpm_idle_work_handler(struct work_struct *work) +{ + struct radeon_device *rdev; + int resched; + rdev = container_of(work, struct radeon_device, + pm.dynpm_idle_work.work); + + resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev); + mutex_lock(&rdev->pm.mutex); + if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) { + int not_processed = 0; + int i; + + for (i = 0; i < RADEON_NUM_RINGS; ++i) { + struct radeon_ring *ring = &rdev->ring[i]; + + if (ring->ready) { + not_processed += radeon_fence_count_emitted(rdev, i); + if (not_processed >= 3) + break; + } + } + + if (not_processed >= 3) { /* should upclock */ + if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) { + rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE; + } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE && + rdev->pm.dynpm_can_upclock) { + rdev->pm.dynpm_planned_action = + DYNPM_ACTION_UPCLOCK; + rdev->pm.dynpm_action_timeout = jiffies + + msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS); + } + } else if (not_processed == 0) { /* should downclock */ + if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) { + rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE; + } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE && + rdev->pm.dynpm_can_downclock) { + rdev->pm.dynpm_planned_action = + DYNPM_ACTION_DOWNCLOCK; + rdev->pm.dynpm_action_timeout = jiffies + + msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS); + } + } + + /* Note, radeon_pm_set_clocks is called with static_switch set + * to false since we want to wait for vbl to avoid flicker. + */ + if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE && + jiffies > rdev->pm.dynpm_action_timeout) { + radeon_pm_get_dynpm_state(rdev); + radeon_pm_set_clocks(rdev); + } + + schedule_delayed_work(&rdev->pm.dynpm_idle_work, + msecs_to_jiffies(RADEON_IDLE_LOOP_MS)); + } + mutex_unlock(&rdev->pm.mutex); + ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched); +} + +/* + * 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, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk); + /* radeon_get_engine_clock is not reliable on APUs so just print the current clock */ + if ((rdev->family >= CHIP_PALM) && (rdev->flags & RADEON_IS_IGP)) + seq_printf(m, "current engine clock: %u0 kHz\n", rdev->pm.current_sclk); + else + seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev)); + seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk); + if (rdev->asic->pm.get_memory_clock) + seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev)); + if (rdev->pm.current_vddc) + seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc); + if (rdev->asic->pm.get_pcie_lanes) + seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(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 +} |