bus: mhi: core: Introduce counters to track MHI device state transitions (601455da) · Commits · 戴 / test

drivers/bus/mhi/core/pm.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;

+2 −0

Original line number	Diff line number	Diff line
		@@ -328,6 +328,7 @@ struct mhi_controller_config {
		* @dev_state: MHI device state
		* @dev_wake: Device wakeup count
		* @pending_pkts: Pending packets for the controller
		* @M0, M2, M3: Counters to track number of device MHI state changes
		* @transition_list: List of MHI state transitions
		* @transition_lock: Lock for protecting MHI state transition list
		* @wlock: Lock for protecting device wakeup
		@@ -407,6 +408,7 @@ struct mhi_controller {
		enum mhi_state dev_state;
		atomic_t dev_wake;
		atomic_t pending_pkts;
		u32 M0, M2, M3;
		struct list_head transition_list;
		spinlock_t transition_lock;
		spinlock_t wlock;