/** Function to handle the @ref KBASE_PM_EVENT_SYSTEM_RESUME message for the always_on power policy.
*
* This function is called when a @ref KBASE_PM_EVENT_SYSTEM_RESUME message is received. It instructs the GPU to turn on all
* the cores.
*
* @param kbdev The kbase device structure for the device
*/
static void always_on_resume(kbase_device *kbdev)
{
u64 cores;
/* Inform the system that the transition has started */
kbase_pm_power_transitioning(kbdev);
/* Turn the clock on */
kbase_pm_clock_on(kbdev);
/* Enable interrupts */
kbase_pm_enable_interrupts(kbdev);
/* Turn the cores on */
cores = kbase_pm_get_present_cores(kbdev, KBASE_PM_CORE_SHADER);
kbase_pm_invoke_power_up(kbdev, KBASE_PM_CORE_SHADER, cores);
cores = kbase_pm_get_present_cores(kbdev, KBASE_PM_CORE_TILER);
kbase_pm_invoke_power_up(kbdev, KBASE_PM_CORE_TILER, cores);
kbase_pm_check_transitions(kbdev);
kbdev->pm.policy_data.always_on.state = KBASEP_PM_ALWAYS_ON_STATE_POWERING_UP;
/* Ensure that the OS is informed even if we didn't do anything */
always_on_state_changed(kbdev);
}
void kbase_pm_do_poweron(kbase_device *kbdev, mali_bool is_resume)
{
volatile u64 cores_powered;
int cnt = 0xFFFF;
lockdep_assert_held(&kbdev->pm.lock);
/* Turn clocks and interrupts on - no-op if we haven't done a previous
* kbase_pm_clock_off() */
kbase_pm_clock_on(kbdev, is_resume);
/* Update core status as required by the policy */
KBASE_TIMELINE_PM_CHECKTRANS(kbdev, SW_FLOW_PM_CHECKTRANS_PM_DO_POWERON_START);
kbase_pm_update_cores_state(kbdev);
KBASE_TIMELINE_PM_CHECKTRANS(kbdev, SW_FLOW_PM_CHECKTRANS_PM_DO_POWERON_END);
/* NOTE: We don't wait to reach the desired state, since running atoms
* will wait for that state to be reached anyway */
do {
cores_powered = kbase_pm_get_ready_cores(kbdev, KBASE_PM_CORE_SHADER);
cnt --;
} while(((cores_powered & 0x3f) != 0x3f) && cnt > 0);
if(cnt == 0)
KBASE_TRACE_ADD_EXYNOS(kbdev, LSI_POWER_ON_COUNT_EXPIRED, NULL, NULL, 0u, 0u);
if (kbdev->pm.callback_power_on_post)
kbdev->pm.callback_power_on_post(kbdev);
}
/** Turns the cores on.
*
* This function turns all the cores of the GPU on.
*/
static void demand_power_up(kbase_device *kbdev)
{
/* Inform the system that the transition has started */
kbase_pm_power_transitioning(kbdev);
/* Turn clocks and interrupts on */
kbase_pm_clock_on(kbdev);
kbase_pm_enable_interrupts(kbdev);
kbase_pm_check_transitions(kbdev);
kbdev->pm.policy_data.demand.state = KBASEP_PM_DEMAND_STATE_POWERING_UP;
}
void kbase_pm_do_poweron(kbase_device *kbdev)
{
lockdep_assert_held(&kbdev->pm.lock);
/* Turn clocks and interrupts on - no-op if we haven't done a previous
* kbase_pm_clock_off() */
kbase_pm_clock_on(kbdev);
/* Update core status as required by the policy */
KBASE_TIMELINE_PM_CHECKTRANS(kbdev, SW_FLOW_PM_CHECKTRANS_PM_DO_POWERON_START);
kbase_pm_update_cores_state(kbdev);
KBASE_TIMELINE_PM_CHECKTRANS(kbdev, SW_FLOW_PM_CHECKTRANS_PM_DO_POWERON_END);
/* NOTE: We don't wait to reach the desired state, since running atoms
* will wait for that state to be reached anyway */
}