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PCI: qcom: Don't wait for link if we can detect Link Up

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If we have a 'global' IRQ for Link Up events, we need not wait for the
link to be up during PCI initialization, which reduces startup time.

Check for 'global' IRQ, and if present, set 'use_linkup_irq',
so dw_pcie_host_init() doesn't wait for the link to come up.

Link: https://lore.kernel.org/r/20241123-remove_wait2-v5-2-b5f9e6b794c2@quicinc.com
Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
This commit is contained in:
Krishna chaitanya chundru 2024-11-23 00:40:00 +05:30 committed by Bjorn Helgaas
parent 8d3bf19f1b
commit 36971d6c5a
1 changed files with 4 additions and 1 deletions
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5
drivers/pci/controller/dwc/pcie-qcom.c
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@ -1703,6 +1703,10 @@ static int qcom_pcie_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, pcie);
irq = platform_get_irq_byname_optional(pdev, "global");
if (irq > 0)
pp->use_linkup_irq = true;
ret = dw_pcie_host_init(pp);
if (ret) {
dev_err(dev, "cannot initialize host\n");
@ -1716,7 +1720,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
goto err_host_deinit;
}
irq = platform_get_irq_byname_optional(pdev, "global");
if (irq > 0) {
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
qcom_pcie_global_irq_thread,