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drm/radeon/kms: add code to select power state

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not hooked up yet.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2009-12-23 14:28:05 -05:00 • committed by Dave Airlie
parent 0ec0e74f78
commit 516d0e46c8
2 changed files with 131 additions and 0 deletions
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122
drivers/gpu/drm/radeon/radeon_pm.c
View file

@ -79,6 +79,128 @@ static void radeon_print_power_mode_info(struct radeon_device *rdev)
}
}
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;
}
}
static void radeon_set_power_state(struct radeon_device *rdev)
{
if (rdev->pm.requested_power_state == rdev->pm.current_power_state)
return;
/* 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;