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path: root/drivers/bus/mhi/core/pm.c
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Diffstat (limited to 'drivers/bus/mhi/core/pm.c')
-rw-r--r--drivers/bus/mhi/core/pm.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
index 796098078083..3de7b1639ec6 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/core/pm.c
@@ -256,6 +256,7 @@ int mhi_pm_m0_transition(struct mhi_controller *mhi_cntrl)
dev_err(dev, "Unable to transition to M0 state\n");
return -EIO;
}
+ mhi_cntrl->M0++;
/* Wake up the device */
read_lock_bh(&mhi_cntrl->pm_lock);
@@ -326,6 +327,8 @@ void mhi_pm_m1_transition(struct mhi_controller *mhi_cntrl)
mhi_cntrl->dev_state = MHI_STATE_M2;
write_unlock_irq(&mhi_cntrl->pm_lock);
+
+ mhi_cntrl->M2++;
wake_up_all(&mhi_cntrl->state_event);
/* If there are any pending resources, exit M2 immediately */
@@ -362,6 +365,7 @@ int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl)
return -EIO;
}
+ mhi_cntrl->M3++;
wake_up_all(&mhi_cntrl->state_event);
return 0;
@@ -686,7 +690,8 @@ int mhi_pm_suspend(struct mhi_controller *mhi_cntrl)
return -EIO;
/* Return busy if there are any pending resources */
- if (atomic_read(&mhi_cntrl->dev_wake))
+ if (atomic_read(&mhi_cntrl->dev_wake) ||
+ atomic_read(&mhi_cntrl->pending_pkts))
return -EBUSY;
/* Take MHI out of M2 state */
@@ -712,7 +717,8 @@ int mhi_pm_suspend(struct mhi_controller *mhi_cntrl)
write_lock_irq(&mhi_cntrl->pm_lock);
- if (atomic_read(&mhi_cntrl->dev_wake)) {
+ if (atomic_read(&mhi_cntrl->dev_wake) ||
+ atomic_read(&mhi_cntrl->pending_pkts)) {
write_unlock_irq(&mhi_cntrl->pm_lock);
return -EBUSY;
}
@@ -822,11 +828,8 @@ int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl)
/* Wake up the device */
read_lock_bh(&mhi_cntrl->pm_lock);
mhi_cntrl->wake_get(mhi_cntrl, true);
- if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) {
- pm_wakeup_event(&mhi_cntrl->mhi_dev->dev, 0);
- mhi_cntrl->runtime_get(mhi_cntrl);
- mhi_cntrl->runtime_put(mhi_cntrl);
- }
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
read_unlock_bh(&mhi_cntrl->pm_lock);
ret = wait_event_timeout(mhi_cntrl->state_event,
@@ -915,7 +918,7 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
dev_info(dev, "Requested to power ON\n");
- if (mhi_cntrl->nr_irqs < mhi_cntrl->total_ev_rings)
+ if (mhi_cntrl->nr_irqs < 1)
return -EINVAL;
/* Supply default wake routines if not provided by controller driver */
@@ -1113,6 +1116,9 @@ void mhi_device_get(struct mhi_device *mhi_dev)
mhi_dev->dev_wake++;
read_lock_bh(&mhi_cntrl->pm_lock);
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
+
mhi_cntrl->wake_get(mhi_cntrl, true);
read_unlock_bh(&mhi_cntrl->pm_lock);
}
@@ -1137,10 +1143,8 @@ void mhi_device_put(struct mhi_device *mhi_dev)
mhi_dev->dev_wake--;
read_lock_bh(&mhi_cntrl->pm_lock);
- if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) {
- mhi_cntrl->runtime_get(mhi_cntrl);
- mhi_cntrl->runtime_put(mhi_cntrl);
- }
+ if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
+ mhi_trigger_resume(mhi_cntrl);
mhi_cntrl->wake_put(mhi_cntrl, false);
read_unlock_bh(&mhi_cntrl->pm_lock);