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linux/drivers/gpu/drm/radeon/radeon_pm.c
Matthew Garrett c37d230af4 radeon: Make sure that we determine the correct PM state before transition
We need to choose the correct PM state to transition into before starting
the actual change. Call radeon_get_power_state() at the top of the clock
setting to do so.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-05-18 18:21:26 +10:00

559 lines
16 KiB
C

/*
* 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"
#include "avivod.h"
#define RADEON_IDLE_LOOP_MS 100
#define RADEON_RECLOCK_DELAY_MS 200
#define RADEON_WAIT_VBLANK_TIMEOUT 200
#define RADEON_WAIT_IDLE_TIMEOUT 200
static void radeon_pm_idle_work_handler(struct work_struct *work);
static int radeon_debugfs_pm_init(struct radeon_device *rdev);
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);
}
if (rdev->gart.table.vram.robj)
ttm_bo_unmap_virtual(&rdev->gart.table.vram.robj->tbo);
if (rdev->stollen_vga_memory)
ttm_bo_unmap_virtual(&rdev->stollen_vga_memory->tbo);
if (rdev->r600_blit.shader_obj)
ttm_bo_unmap_virtual(&rdev->r600_blit.shader_obj->tbo);
}
static void radeon_pm_set_clocks(struct radeon_device *rdev, int static_switch)
{
int i;
if (!static_switch)
radeon_get_power_state(rdev, rdev->pm.planned_action);
mutex_lock(&rdev->cp.mutex);
/* wait for GPU idle */
rdev->pm.gui_idle = false;
rdev->irq.gui_idle = true;
radeon_irq_set(rdev);
wait_event_interruptible_timeout(
rdev->irq.idle_queue, rdev->pm.gui_idle,
msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));
rdev->irq.gui_idle = false;
radeon_irq_set(rdev);
mutex_lock(&rdev->vram_mutex);
radeon_unmap_vram_bos(rdev);
if (!static_switch) {
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, static_switch);
if (!static_switch) {
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);
}
}
}
mutex_unlock(&rdev->vram_mutex);
/* 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.planned_action = PM_ACTION_NONE;
mutex_unlock(&rdev->cp.mutex);
}
static ssize_t radeon_get_power_state_static(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;
return snprintf(buf, PAGE_SIZE, "%d.%d\n", rdev->pm.current_power_state_index,
rdev->pm.current_clock_mode_index);
}
static ssize_t radeon_set_power_state_static(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;
int ps, cm;
if (sscanf(buf, "%u.%u", &ps, &cm) != 2) {
DRM_ERROR("Invalid power state!\n");
return count;
}
mutex_lock(&rdev->ddev->struct_mutex);
mutex_lock(&rdev->pm.mutex);
if ((ps >= 0) && (ps < rdev->pm.num_power_states) &&
(cm >= 0) && (cm < rdev->pm.power_state[ps].num_clock_modes)) {
if ((rdev->pm.active_crtc_count > 1) &&
(rdev->pm.power_state[ps].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)) {
DRM_ERROR("Invalid power state for multi-head: %d.%d\n", ps, cm);
} else {
/* disable dynpm */
rdev->pm.state = PM_STATE_DISABLED;
rdev->pm.planned_action = PM_ACTION_NONE;
rdev->pm.requested_power_state_index = ps;
rdev->pm.requested_clock_mode_index = cm;
radeon_pm_set_clocks(rdev, true);
}
} else
DRM_ERROR("Invalid power state: %d.%d\n\n", ps, cm);
mutex_unlock(&rdev->pm.mutex);
mutex_unlock(&rdev->ddev->struct_mutex);
return count;
}
static ssize_t radeon_get_dynpm(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;
return snprintf(buf, PAGE_SIZE, "%s\n",
(rdev->pm.state == PM_STATE_DISABLED) ? "disabled" : "enabled");
}
static ssize_t radeon_set_dynpm(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;
int tmp = simple_strtoul(buf, NULL, 10);
if (tmp == 0) {
/* update power mode info */
radeon_pm_compute_clocks(rdev);
/* disable dynpm */
mutex_lock(&rdev->pm.mutex);
rdev->pm.state = PM_STATE_DISABLED;
rdev->pm.planned_action = PM_ACTION_NONE;
mutex_unlock(&rdev->pm.mutex);
DRM_INFO("radeon: dynamic power management disabled\n");
} else if (tmp == 1) {
if (rdev->pm.num_power_states > 1) {
/* enable dynpm */
mutex_lock(&rdev->ddev->struct_mutex);
mutex_lock(&rdev->pm.mutex);
rdev->pm.state = PM_STATE_PAUSED;
rdev->pm.planned_action = PM_ACTION_DEFAULT;
radeon_get_power_state(rdev, rdev->pm.planned_action);
mutex_unlock(&rdev->pm.mutex);
mutex_unlock(&rdev->ddev->struct_mutex);
/* update power mode info */
radeon_pm_compute_clocks(rdev);
DRM_INFO("radeon: dynamic power management enabled\n");
} else
DRM_ERROR("dynpm not valid on this system\n");
} else
DRM_ERROR("Invalid setting: %d\n", tmp);
return count;
}
static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, radeon_get_power_state_static, radeon_set_power_state_static);
static DEVICE_ATTR(dynpm, S_IRUGO | S_IWUSR, radeon_get_dynpm, radeon_set_dynpm);
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] = {
"",
"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_index == 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].pcie_lanes);
if (rdev->pm.power_state[i].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)
DRM_INFO("\tSingle display only\n");
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);
}
}
}
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));
}
}
int radeon_pm_init(struct radeon_device *rdev)
{
rdev->pm.state = PM_STATE_DISABLED;
rdev->pm.planned_action = PM_ACTION_NONE;
rdev->pm.can_upclock = true;
rdev->pm.can_downclock = true;
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");
}
/* where's the best place to put this? */
device_create_file(rdev->dev, &dev_attr_power_state);
device_create_file(rdev->dev, &dev_attr_dynpm);
INIT_DELAYED_WORK(&rdev->pm.idle_work, radeon_pm_idle_work_handler);
if ((radeon_dynpm != -1 && radeon_dynpm) && (rdev->pm.num_power_states > 1)) {
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_fini(struct radeon_device *rdev)
{
if (rdev->pm.state != PM_STATE_DISABLED) {
/* cancel work */
cancel_delayed_work_sync(&rdev->pm.idle_work);
/* reset default clocks */
rdev->pm.state = PM_STATE_DISABLED;
rdev->pm.planned_action = PM_ACTION_DEFAULT;
radeon_pm_set_clocks(rdev, false);
} else if ((rdev->pm.current_power_state_index !=
rdev->pm.default_power_state_index) ||
(rdev->pm.current_clock_mode_index != 0)) {
rdev->pm.requested_power_state_index = rdev->pm.default_power_state_index;
rdev->pm.requested_clock_mode_index = 0;
mutex_lock(&rdev->ddev->struct_mutex);
mutex_lock(&rdev->pm.mutex);
radeon_pm_set_clocks(rdev, true);
mutex_unlock(&rdev->pm.mutex);
mutex_unlock(&rdev->ddev->struct_mutex);
}
device_remove_file(rdev->dev, &dev_attr_power_state);
device_remove_file(rdev->dev, &dev_attr_dynpm);
if (rdev->pm.i2c_bus)
radeon_i2c_destroy(rdev->pm.i2c_bus);
}
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.state == PM_STATE_DISABLED)
return;
mutex_lock(&rdev->ddev->struct_mutex);
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.active_crtc_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;
radeon_pm_set_clocks(rdev, false);
DRM_DEBUG("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.state == PM_STATE_MINIMUM) {
rdev->pm.state = PM_STATE_ACTIVE;
rdev->pm.planned_action = PM_ACTION_UPCLOCK;
radeon_pm_set_clocks(rdev, false);
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, false);
}
}
mutex_unlock(&rdev->pm.mutex);
mutex_unlock(&rdev->ddev->struct_mutex);
}
bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
{
u32 stat_crtc = 0;
bool in_vbl = true;
if (ASIC_IS_DCE4(rdev)) {
if (rdev->pm.active_crtcs & (1 << 0)) {
stat_crtc = RREG32(EVERGREEN_CRTC_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET);
if (!(stat_crtc & 1))
in_vbl = false;
}
if (rdev->pm.active_crtcs & (1 << 1)) {
stat_crtc = RREG32(EVERGREEN_CRTC_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET);
if (!(stat_crtc & 1))
in_vbl = false;
}
if (rdev->pm.active_crtcs & (1 << 2)) {
stat_crtc = RREG32(EVERGREEN_CRTC_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET);
if (!(stat_crtc & 1))
in_vbl = false;
}
if (rdev->pm.active_crtcs & (1 << 3)) {
stat_crtc = RREG32(EVERGREEN_CRTC_STATUS + EVERGREEN_CRTC3_REGISTER_OFFSET);
if (!(stat_crtc & 1))
in_vbl = false;
}
if (rdev->pm.active_crtcs & (1 << 4)) {
stat_crtc = RREG32(EVERGREEN_CRTC_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET);
if (!(stat_crtc & 1))
in_vbl = false;
}
if (rdev->pm.active_crtcs & (1 << 5)) {
stat_crtc = RREG32(EVERGREEN_CRTC_STATUS + EVERGREEN_CRTC5_REGISTER_OFFSET);
if (!(stat_crtc & 1))
in_vbl = false;
}
} else if (ASIC_IS_AVIVO(rdev)) {
if (rdev->pm.active_crtcs & (1 << 0)) {
stat_crtc = RREG32(D1CRTC_STATUS);
if (!(stat_crtc & 1))
in_vbl = false;
}
if (rdev->pm.active_crtcs & (1 << 1)) {
stat_crtc = RREG32(D2CRTC_STATUS);
if (!(stat_crtc & 1))
in_vbl = false;
}
} else {
if (rdev->pm.active_crtcs & (1 << 0)) {
stat_crtc = RREG32(RADEON_CRTC_STATUS);
if (!(stat_crtc & 1))
in_vbl = false;
}
if (rdev->pm.active_crtcs & (1 << 1)) {
stat_crtc = RREG32(RADEON_CRTC2_STATUS);
if (!(stat_crtc & 1))
in_vbl = false;
}
}
if (in_vbl == false)
DRM_INFO("not in vbl for pm change %08x at %s\n", stat_crtc,
finish ? "exit" : "entry");
return in_vbl;
}
static void radeon_pm_idle_work_handler(struct work_struct *work)
{
struct radeon_device *rdev;
int resched;
rdev = container_of(work, struct radeon_device,
pm.idle_work.work);
resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
mutex_lock(&rdev->ddev->struct_mutex);
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.can_upclock) {
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.can_downclock) {
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, false);
}
}
mutex_unlock(&rdev->pm.mutex);
mutex_unlock(&rdev->ddev->struct_mutex);
ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
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));
if (rdev->asic->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
}