/** Function to handle a GPU state change for the demand power policy
*
* This function is called whenever the GPU has transitioned to another state. It first checks that the transition is
* complete and then moves the state machine to the next state.
*/
static void demand_state_changed(kbase_device *kbdev)
{
kbasep_pm_policy_demand *data = &kbdev->pm.policy_data.demand;
switch(data->state) {
case KBASEP_PM_DEMAND_STATE_CHANGING_POLICY:
case KBASEP_PM_DEMAND_STATE_POWERING_UP:
case KBASEP_PM_DEMAND_STATE_POWERING_DOWN:
if (kbase_pm_get_pwr_active(kbdev)) {
/* Cores are still transitioning - ignore the event */
return;
}
break;
default:
/* Must not call kbase_pm_get_pwr_active here as the clock may be turned off */
break;
}
switch(data->state)
{
case KBASEP_PM_DEMAND_STATE_CHANGING_POLICY:
/* Signal power events before switching the policy */
kbase_pm_power_up_done(kbdev);
kbase_pm_power_down_done(kbdev);
kbase_pm_change_policy(kbdev);
break;
case KBASEP_PM_DEMAND_STATE_POWERING_UP:
data->state = KBASEP_PM_DEMAND_STATE_POWERED_UP;
kbase_pm_power_up_done(kbdev);
/* State changed, try to run jobs */
kbase_js_try_run_jobs(kbdev);
break;
case KBASEP_PM_DEMAND_STATE_POWERING_DOWN:
data->state = KBASEP_PM_DEMAND_STATE_POWERED_DOWN;
/* Disable interrupts and turn the clock off */
kbase_pm_disable_interrupts(kbdev);
kbase_pm_clock_off(kbdev);
kbase_pm_power_down_done(kbdev);
break;
case KBASEP_PM_DEMAND_STATE_POWERED_UP:
/* Core states may have been changed, try to run jobs */
kbase_js_try_run_jobs(kbdev);
break;
default:
break;
}
}
/** Function to handle a GPU state change for the always_on power policy.
*
* This function is called whenever the GPU has transitioned to another state. It first checks that the transition is
* complete and then moves the state machine to the next state.
*
* @param kbdev The kbase device structure for the device
*/
static void always_on_state_changed(kbase_device *kbdev)
{
kbasep_pm_policy_always_on *data = &kbdev->pm.policy_data.always_on;
switch(data->state)
{
case KBASEP_PM_ALWAYS_ON_STATE_POWERING_UP:
if (kbase_pm_get_pwr_active(kbdev))
{
/* Cores still transitioning */
return;
}
/* All cores have transitioned, inform the OS */
kbase_pm_power_up_done(kbdev);
data->state = KBASEP_PM_ALWAYS_ON_STATE_POWERED_UP;
break;
case KBASEP_PM_ALWAYS_ON_STATE_POWERING_DOWN:
if (kbase_pm_get_pwr_active(kbdev))
{
/* Cores still transitioning */
return;
}
/* All cores have transitioned, turn the clock and interrupts off */
kbase_pm_disable_interrupts(kbdev);
kbase_pm_clock_off(kbdev);
/* Inform the OS */
kbase_pm_power_down_done(kbdev);
data->state = KBASEP_PM_ALWAYS_ON_STATE_POWERED_DOWN;
break;
case KBASEP_PM_ALWAYS_ON_STATE_CHANGING_POLICY:
if (kbase_pm_get_pwr_active(kbdev))
{
/* Cores still transitioning */
return;
}
/* All cores have transitioned, inform the system we can change policy*/
kbase_pm_change_policy(kbdev);
break;
default:
break;
}
}
