On Thu, Jul 13, 2023 at 12:40:09PM +0530, Krishna chaitanya chundru wrote: > Here we propose this patch series to add support in PCI endpoint > driver to wake up host from D3 states. > > As endpoint cannot send any data/MSI when the D-state is in > D3cold or D3hot. Endpoint needs to bring the device back to D0 > to send any kind of data. > > For this endpoint needs to send inband PME the device is in D3 state or > toggle wake when the device is D3 cold and vaux is not supplied. > > As EPF doestn't know the D-state of the PCI, added a notify op whenever > device state changes. > > Based on the D-state the EPF driver decides to wake host either by > toggling wake or by sending PME. > > When the MHI state is in M3 MHI driver will wakeup the host using the > wakeup op. > Please split this series into two. One adding D-state support and another (dependant) adding wakeup support. We can try to merge atleast first one for 6.6. - Mani > --- > Changes from v3: > - changed the bool return type to int for waking the host in mhi ep driver > as suggested by dan and bjorn. > - Changed commit logs as suggested by bjorn. > Changes from v2: > - Addressed review comments made by mani. > Changes from v1: > - Moved from RFC patch to regular patch > - Inclueded EPF patch and added a new op patch to notify D-state change. > --- > > Krishna chaitanya chundru (9): > PCI: endpoint: Add D-state change notifier support > PCI: qcom-ep: Add support for D-state change notification > PCI: epf-mhi: Add support for handling D-state notify from EPC > PCI: qcom-ep: Update the D-state log > PCI: endpoint: Add wakeup host API to EPC core > PCI: dwc: Add wakeup host op to pci_epc_ops > PCI: qcom-ep: Add wake up host op to dw_pcie_ep_ops > PCI: epf-mhi: Add wakeup host op > bus: mhi: ep: wake up host if the MHI state is in M3 > > Documentation/PCI/endpoint/pci-endpoint.rst | 11 +++++ > drivers/bus/mhi/ep/main.c | 27 ++++++++++++ > drivers/pci/controller/dwc/pcie-designware-ep.c | 12 +++++ > drivers/pci/controller/dwc/pcie-designware.h | 3 ++ > drivers/pci/controller/dwc/pcie-qcom-ep.c | 36 ++++++++++++++- > drivers/pci/endpoint/functions/pci-epf-mhi.c | 27 ++++++++++++ > drivers/pci/endpoint/pci-epc-core.c | 58 +++++++++++++++++++++++++ > include/linux/mhi_ep.h | 4 ++ > include/linux/pci-epc.h | 12 +++++ > include/linux/pci-epf.h | 1 + > 10 files changed, 190 insertions(+), 1 deletion(-) > > -- > 2.7.4 > -- மணிவண்ணன் சதாசிவம்
