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msm: ep_pcie: Changes to acquire wakelock as part of PERST IRQ

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Changes to acquire wakelock as part of PERST deassert
in non enumerated scenario.

Change-Id: Ica992e12fe827e29416fbe56469d7be8b92ff5c5
Signed-off-by: Subramanian Ananthanarayanan <skananth@codeaurora.org>
Signed-off-by: Gauri Joshi <gaurjosh@codeaurora.org>
This commit is contained in:
Gauri Joshi 2020-11-09 13:11:40 +05:30
commit 49401bbfc2
1 changed files with 12 additions and 0 deletions
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12
drivers/platform/msm/ep_pcie/ep_pcie_core.c
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@ -2330,6 +2330,18 @@ static irqreturn_t ep_pcie_handle_perst_irq(int irq, void *data)
"PCIe V%d: PCIe is not enumerated yet; PERST is %sasserted\n",
dev->rev, perst ? "de" : "");
if (perst) {
/*
* Hold a wakelock to avoid delay during
* link enablement in PCIE layer in non
* enumerated scenario.
*/
if (!atomic_read(&dev->ep_pcie_dev_wake)) {
pm_stay_awake(&dev->pdev->dev);
atomic_set(&dev->ep_pcie_dev_wake, 1);
EP_PCIE_DBG(dev,
"PCIe V%d: Acquired wakelock\n",
dev->rev);
}
/* start work for link enumeration with the host side */
schedule_work(&dev->handle_perst_work);
} else {