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pci: msm: Dump PCIe registers upon WAKE assertion

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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: Hemant Kumar <hemantk@codeaurora.org>
This commit is contained in:
Hemant Kumar 2020-11-18 12:47:55 -08:00
commit 1048d7aacc
1 changed files with 14 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

21
drivers/pci/controller/pci-msm.c
View file

@ -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;