/** Turn the cores off.
*
* This function turns all the cores of the GPU off.
*/
static void demand_power_down(kbase_device *kbdev)
{
u64 cores;
/* Inform the system that the transition has started */
kbase_pm_power_transitioning(kbdev);
/* Turn the cores off */
cores = kbase_pm_get_present_cores(kbdev, KBASE_PM_CORE_SHADER);
kbase_pm_invoke_power_down(kbdev, KBASE_PM_CORE_SHADER, cores);
cores = kbase_pm_get_present_cores(kbdev, KBASE_PM_CORE_TILER);
kbase_pm_invoke_power_down(kbdev, KBASE_PM_CORE_TILER, cores);
kbdev->pm.policy_data.demand.state = KBASEP_PM_DEMAND_STATE_POWERING_DOWN;
kbase_pm_check_transitions(kbdev);
}
/** Function to handle the @ref KBASE_PM_EVENT_SYSTEM_SUSPEND message for the always_on power policy.
*
* This function is called when a @ref KBASE_PM_EVENT_SYSTEM_SUSPEND message is received. It instructs the GPU to turn off
* all cores.
*
* @param kbdev The kbase device structure for the device
*/
static void always_on_suspend(kbase_device *kbdev)
{
u64 cores;
/* Inform the system that the transition has started */
kbase_pm_power_transitioning(kbdev);
/* Turn the cores off */
cores = kbase_pm_get_present_cores(kbdev, KBASE_PM_CORE_SHADER);
kbase_pm_invoke_power_down(kbdev, KBASE_PM_CORE_SHADER, cores);
cores = kbase_pm_get_present_cores(kbdev, KBASE_PM_CORE_TILER);
kbase_pm_invoke_power_down(kbdev, KBASE_PM_CORE_TILER, cores);
kbase_pm_check_transitions(kbdev);
kbdev->pm.policy_data.always_on.state = KBASEP_PM_ALWAYS_ON_STATE_POWERING_DOWN;
/* Ensure that the OS is informed even if we didn't do anything */
always_on_state_changed(kbdev);
}
/** Turn the GPU off.
*
* Turns the GPU off - assuming that no Job Chains are currently running on the GPU.
*/
static void coarse_demand_power_down(kbase_device *kbdev)
{
u64 cores;
/* Inform the system that the transition has started */
kbase_pm_power_transitioning(kbdev);
cores = kbase_pm_get_present_cores(kbdev, KBASE_PM_CORE_SHADER);
kbase_pm_invoke_power_down(kbdev, KBASE_PM_CORE_SHADER, cores);
cores = kbase_pm_get_present_cores(kbdev, KBASE_PM_CORE_TILER);
kbase_pm_invoke_power_down(kbdev, KBASE_PM_CORE_TILER, cores);
/* Note we don't call kbase_pm_check_transitions because we don't want to wait
* for the above transitions to take place before turning the GPU power domain off */
kbdev->pm.policy_data.coarse_demand.state = KBASEP_PM_COARSE_DEMAND_STATE_POWERING_DOWN;
/* Ensure that the OS is informed even if we didn't do anything */
coarse_demand_state_changed(kbdev);
}
