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Commit 1048d7aa authored by Hemant Kumar's avatar Hemant Kumar
Browse files

pci: msm: Dump PCIe registers upon WAKE assertion 



In case device asserts WAKE due to timeout in exiting L1,
dump PCIe registers if link is in enabled state and drv is
supported.

Change-Id: I3d2edf1a42ef3a00e57418b2744a87d2693c698b
Signed-off-by: default avatarHemant Kumar <hemantk@codeaurora.org>
parent e8b3c550

drivers/pci/controller/pci-msm.c

+14 −7
Original line number Diff line number Diff line
@@ -721,7 +721,6 @@ struct msm_pcie_dev_t { 
	bool enumerated;

	struct work_struct handle_wake_work;

	struct mutex recovery_lock;

	spinlock_t wakeup_lock;

	spinlock_t irq_lock;

	struct mutex aspm_lock;

	int prevent_l1;
@@ -767,6 +766,8 @@ struct msm_pcie_dev_t { 
	int drv_disable_pc_vote;

	struct mutex drv_pc_lock;



	bool drv_supported;



	void (*rumi_init)(struct msm_pcie_dev_t *pcie_dev);

};
@@ -4796,7 +4797,7 @@ static irqreturn_t handle_wake_irq(int irq, void *data) 
	unsigned long irqsave_flags;

	int i;



	spin_lock_irqsave(&dev->wakeup_lock, irqsave_flags);

	spin_lock_irqsave(&dev->irq_lock, irqsave_flags);



	dev->wake_counter++;

	PCIE_DBG(dev, "PCIe: No. %ld wake IRQ for RC%d\n",
@@ -4822,11 +4823,18 @@ static irqreturn_t handle_wake_irq(int irq, void *data) 
					MSM_PCIE_EVENT_WAKEUP);

			}

		} else {

			if (dev->drv_supported && !dev->suspending &&

			    dev->link_status == MSM_PCIE_LINK_ENABLED) {

				pcie_phy_dump(dev);

				pcie_parf_dump(dev);

				pcie_dm_core_dump(dev);

			}



			msm_pcie_notify_client(dev, MSM_PCIE_EVENT_WAKEUP);

		}

	}



	spin_unlock_irqrestore(&dev->wakeup_lock, irqsave_flags);

	spin_unlock_irqrestore(&dev->irq_lock, irqsave_flags);



	return IRQ_HANDLED;

}
@@ -5546,7 +5554,6 @@ static int msm_pcie_probe(struct platform_device *pdev) 
	int i, j;

	struct msm_pcie_dev_t *pcie_dev;

	struct device_node *of_node;

	bool drv_supported;



	dev_info(&pdev->dev, "PCIe: %s\n", __func__);
@@ -5819,8 +5826,9 @@ static int msm_pcie_probe(struct platform_device *pdev) 
		goto decrease_rc_num;

	}



	drv_supported = of_property_read_bool(of_node, "qcom,drv-supported");

	if (drv_supported) {

	pcie_dev->drv_supported = of_property_read_bool(of_node,

							"qcom,drv-supported");

	if (pcie_dev->drv_supported) {

		ret = msm_pcie_setup_drv(pcie_dev, of_node);

		if (ret)

			PCIE_ERR(pcie_dev,
@@ -6514,7 +6522,6 @@ static int __init pcie_init(void) 
		mutex_init(&msm_pcie_dev[i].recovery_lock);

		mutex_init(&msm_pcie_dev[i].aspm_lock);

		mutex_init(&msm_pcie_dev[i].drv_pc_lock);

		spin_lock_init(&msm_pcie_dev[i].wakeup_lock);

		spin_lock_init(&msm_pcie_dev[i].irq_lock);

		msm_pcie_dev[i].drv_ready = false;

		msm_pcie_dev[i].l23_rdy_poll_timeout = L23_READY_POLL_TIMEOUT;