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

[ Upstream commit f0639013d340580b72df95d012a93f35eeb0da64 ]

4581403f6792 ("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: 4581403f6792 ("PCI: qcom: Enumerate endpoints based on Link up event in 'global_irq' interrupt")
Link: https://lore.kernel.org/r/20241123-remove_wait2-v5-3-b5f9e6b794c2@quicinc.com
Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index dc102d8bd58c69b7da7ff1073cbf12de9e0b8896..91b7f9ec78bcc9a67327f297dbb389e13ca73d90 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1569,6 +1569,8 @@ 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);