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[2/2] PCI: qcom: Enable D3 support for the recent PCI bridges

Message ID 20240202-pcie-qcom-bridge-v1-2-46d7789836c0@linaro.org
State New
Headers show
Series Enable D3 support for Qualcomm bridges | expand

Commit Message

Manivannan Sadhasivam Feb. 2, 2024, 6:54 a.m. UTC 
Make use of the "bridge_d3_capable" flag to specify the D3 capability to
the PCI core so that the D3 support (in turn runtime PM) will be enabled
for the PCI bridges.

Currently, only for the recent bridges with PID "0x0110", this flag is set
as a fixup. Because, there is no guarantee that the older bridges will
support D3.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 10f2d0bb86be..a6ae78d2ce92 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1649,6 +1649,11 @@  static void qcom_fixup_class(struct pci_dev *dev)
 {
 	dev->class = PCI_CLASS_BRIDGE_PCI_NORMAL;
 }
+
+static void qcom_fixup_bridge_d3_capability(struct pci_dev *dev)
+{
+	dev->bridge_d3_capable = true;
+}
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0101, qcom_fixup_class);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0104, qcom_fixup_class);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0106, qcom_fixup_class);
@@ -1656,6 +1661,7 @@  DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0107, qcom_fixup_class);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0302, qcom_fixup_class);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1000, qcom_fixup_class);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1001, qcom_fixup_class);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0110, qcom_fixup_bridge_d3_capability);
 
 static const struct dev_pm_ops qcom_pcie_pm_ops = {
 	NOIRQ_SYSTEM_SLEEP_PM_OPS(qcom_pcie_suspend_noirq, qcom_pcie_resume_noirq)