void kbase_pm_suspend(struct kbase_device *kbdev)
{
KBASE_DEBUG_ASSERT(kbdev);
mutex_lock(&kbdev->pm.lock);
KBASE_DEBUG_ASSERT(!kbase_pm_is_suspending(kbdev));
kbdev->pm.suspending = true;
mutex_unlock(&kbdev->pm.lock);
/* From now on, the active count will drop towards zero. Sometimes, it'll
* go up briefly before going down again. However, once it reaches zero it
* will stay there - guaranteeing that we've idled all pm references */
/* Suspend job scheduler and associated components, so that it releases all
* the PM active count references */
kbasep_js_suspend(kbdev);
/* Suspend any counter collection that might be happening */
kbase_instr_hwcnt_suspend(kbdev);
/* Wait for the active count to reach zero. This is not the same as
* waiting for a power down, since not all policies power down when this
* reaches zero. */
wait_event(kbdev->pm.zero_active_count_wait, kbdev->pm.active_count == 0);
/* NOTE: We synchronize with anything that was just finishing a
* kbase_pm_context_idle() call by locking the pm.lock below */
kbase_hwaccess_pm_suspend(kbdev);
}
void kbase_pm_suspend(struct kbase_device *kbdev)
{
int nr_keep_gpu_powered_ctxs;
KBASE_DEBUG_ASSERT(kbdev);
/* MALI_SEC_INTEGRATION */
if(kbdev->vendor_callbacks->hwcnt_prepare_suspend)
kbdev->vendor_callbacks->hwcnt_prepare_suspend(kbdev);
mutex_lock(&kbdev->pm.lock);
KBASE_DEBUG_ASSERT(!kbase_pm_is_suspending(kbdev));
kbdev->pm.suspending = MALI_TRUE;
mutex_unlock(&kbdev->pm.lock);
/* From now on, the active count will drop towards zero. Sometimes, it'll
* go up briefly before going down again. However, once it reaches zero it
* will stay there - guaranteeing that we've idled all pm references */
/* Suspend job scheduler and associated components, so that it releases all
* the PM active count references */
kbasep_js_suspend(kbdev);
#ifndef MALI_SEC_HWCNT
/* Suspend any counter collection that might be happening */
kbase_instr_hwcnt_suspend(kbdev);
#endif
/* Cancel the keep_gpu_powered calls */
for (nr_keep_gpu_powered_ctxs = atomic_read(&kbdev->keep_gpu_powered_count);
nr_keep_gpu_powered_ctxs > 0;
--nr_keep_gpu_powered_ctxs) {
kbase_pm_context_idle(kbdev);
}
/* Wait for the active count to reach zero. This is not the same as
* waiting for a power down, since not all policies power down when this
* reaches zero. */
wait_event(kbdev->pm.zero_active_count_wait, kbdev->pm.active_count == 0);
/* NOTE: We synchronize with anything that was just finishing a
* kbase_pm_context_idle() call by locking the pm.lock below */
/* Force power off the GPU and all cores (regardless of policy), only after
* the PM active count reaches zero (otherwise, we risk turning it off
* prematurely) */
mutex_lock(&kbdev->pm.lock);
kbase_pm_cancel_deferred_poweroff(kbdev);
kbase_pm_do_poweroff(kbdev, MALI_TRUE);
mutex_unlock(&kbdev->pm.lock);
}
