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Commit 73299125 authored by Tony Truong's avatar Tony Truong
Browse files

msm: pcie: add additional latency for PCIe switch case 



Add the latency PCIe endpoint required before PCI framework scans
bus, when PCIe switch exists.

Change-Id: Ia567ccc217e7060c113b318c1bfb87e36b68cd93
Signed-off-by: default avatarYan He <yanhe@codeaurora.org>
Signed-off-by: default avatarTony Truong <truong@codeaurora.org>
parent e80f64ee

drivers/pci/host/pci-msm.c

+14 −0
Original line number Diff line number Diff line
@@ -4309,6 +4309,12 @@ int msm_pcie_enable(struct msm_pcie_dev_t *dev, u32 options) 
	dev->suspending = false;

	dev->link_turned_on_counter++;



	if (dev->bridge_found && dev->ep_latency) {

		PCIE_DBG(dev, "PCIe RC%d add ref clk propagation latency.\n",

			dev->rc_idx);

		usleep_range(dev->ep_latency * 1000, dev->ep_latency * 1000);

	}



	goto out;



link_fail:
@@ -4692,6 +4698,14 @@ int msm_pcie_enumerate(u32 rc_idx) 
				return ret;

			}



			if (dev->ep_latency) {

				PCIE_DBG(dev,

					"PCIe RC%d add ref clk propagation latency.\n",

					dev->rc_idx);

				usleep_range(dev->ep_latency * 1000,

					dev->ep_latency * 1000);

			}



			bus = pci_create_root_bus(&dev->pdev->dev, 0,

						&msm_pcie_ops,

						msm_pcie_setup_sys_data(dev),