[PATCH] PCI: qcom: Skip system suspend/resume for firmware-managed PCIe

[Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>]

For firmware-managed PCIe controllers, all resources, including clocks,
regulators, resets, PHYs and link state, are owned and managed by
firmware. The host driver must not attempt to manage these resources
during system suspend or resume.

Skip the suspend and resume operations for firmware-managed controllers.
The associated power domain transitions are handled independently by the
genpd framework through its own system suspend/resume callbacks, so no
explicit action is required by the PCIe driver.

Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
---
Hi,

Firmware-managed PCIe controllers rely on firmware for managing PCIe
resources such as clocks, regulators, resets, PHYs and link state.
     
Skip the host-managed suspend/resume operations for such controllers.
The associated power-domain transitions are already handled by the
generic power-domain framework during system suspend/resume.

Thanks,
Mrinmay
---
 drivers/pci/controller/dwc/pcie-qcom.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index b58a607b713f..56f0d039e36d 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -2341,6 +2341,10 @@ static int qcom_pcie_suspend_noirq(struct device *dev)
 {
 	struct qcom_pcie *pcie;
 	int ret = 0;
+	const struct qcom_pcie_cfg *pcie_cfg = of_device_get_match_data(dev);
+
+	if (pcie_cfg && pcie_cfg->firmware_managed)
+		return 0;
 
 	pcie = dev_get_drvdata(dev);
 	if (!pcie)
@@ -2399,6 +2403,10 @@ static int qcom_pcie_resume_noirq(struct device *dev)
 {
 	struct qcom_pcie *pcie;
 	int ret;
+	const struct qcom_pcie_cfg *pcie_cfg = of_device_get_match_data(dev);
+
+	if (pcie_cfg && pcie_cfg->firmware_managed)
+		return 0;
 
 	pcie = dev_get_drvdata(dev);
 	if (!pcie)

---
base-commit: e30626823a406725ce29bc75cb8ec467d3e1e326
change-id: 20260831-skip_suspend-a5bc5b29fb34

Best regards,
--  
Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>