PCI: qcom: Update ICC and OPP values after Link Up event

JIRA: https://issues.redhat.com/browse/RHEL-67693
Upstream Status: f063901

commit f063901
Author: Krishna chaitanya chundru <[email protected]>
Date:   Sat Nov 23 00:40:01 2024 +0530

    PCI: qcom: Update ICC and OPP values after Link Up event

    4581403 ("PCI: qcom: Enumerate endpoints based on Link up event in
    'global_irq' interrupt") added the Link Up-based enumeration support, but
    did not update the ICC/OPP vote once link is up. Before that, the update
    happened during probe and the endpoints may or may not be enumerated at
    that time, so the ICC/OPP vote was not guaranteed to be accurate.

    With Link Up-based enumeration support, the driver can request the accurate
    vote based on the PCIe link.

    Call qcom_pcie_icc_opp_update() in qcom_pcie_global_irq_thread() after
    enumerating the endpoints.

    Fixes: 4581403 ("PCI: qcom: Enumerate endpoints based on Link up event in 'global_irq' interrupt")
    Link: https://lore.kernel.org/r/[email protected]
    Signed-off-by: Krishna chaitanya chundru <[email protected]>
    [kwilczynski: commit log]
    Signed-off-by: Krzysztof Wilczyński <[email protected]>
    Signed-off-by: Bjorn Helgaas <[email protected]>
    Reviewed-by: Manivannan Sadhasivam <[email protected]>
    Reviewed-by: Niklas Cassel <[email protected]>

Signed-off-by: Myron Stowe <[email protected]>

Author: Myron Stowe

drivers/pci/controller/dwc/pcie-qcom.c

@@ -1559,6 +1559,8 @@ static irqreturn_t qcom_pcie_global_irq_thread(int irq, void *data)
 		pci_lock_rescan_remove();
 		pci_rescan_bus(pp->bridge->bus);
 		pci_unlock_rescan_remove();
+
+		qcom_pcie_icc_opp_update(pcie);
 	} else {
 		dev_WARN_ONCE(dev, 1, "Received unknown event. INT_STATUS: 0x%08x\n",
 			      status);