Currently controller driver goes to runtime suspend irrespective of the child(pci-pci bridge & endpoint driver) runtime state. This is because the runtime pm is not being enabled for the host bridge dev which maintains parent child relationship. So enable pm runtime for the host bridge, so that controller driver goes to suspend only when all child devices goes to runtime suspend. Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx> --- drivers/pci/controller/dwc/pcie-designware-host.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index d5fc31f8345f..57756a73df30 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -16,6 +16,7 @@ #include <linux/of_pci.h> #include <linux/pci_regs.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include "../../pci.h" #include "pcie-designware.h" @@ -505,6 +506,9 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp) if (pp->ops->post_init) pp->ops->post_init(pp); + pm_runtime_set_active(&bridge->dev); + pm_runtime_enable(&bridge->dev); + return 0; err_stop_link: --- base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d change-id: 20240219-runtime_pm_enable-bdc17914bd50 Best regards, -- Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
