| Message ID | 20250313-mhi_bw_up-v2-3-869ca32170bf@oss.qualcomm.com |
|---|---|
| State | New |
| Headers | show |
| Series | bus: mhi: host: Add support for mhi bus bw | expand |
On Thu, Mar 13, 2025 at 05:10:10PM +0530, Krishna Chaitanya Chundru wrote: > Add support for pre_scale_bus_bw() & post_scale_bus_bw() function op's. > Add support for DWC glue drivers to register for these ops. > > Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com> > --- > drivers/pci/controller/dwc/pcie-designware-host.c | 21 +++++++++++++++++++++ > drivers/pci/controller/dwc/pcie-designware.h | 2 ++ > 2 files changed, 23 insertions(+) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c > index ffaded8f2df7..4da4df62c3f8 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-host.c > +++ b/drivers/pci/controller/dwc/pcie-designware-host.c > @@ -697,10 +697,31 @@ void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, > } > EXPORT_SYMBOL_GPL(dw_pcie_own_conf_map_bus); > > +static int dw_pcie_pre_scale_bus_bw(struct pci_bus *bus, int target_speed) > +{ > + struct dw_pcie_rp *pp = bus->sysdata; > + int ret = 0; > + > + if (pp->ops->pre_scale_bus_bw) > + ret = pp->ops->pre_scale_bus_bw(pp, target_speed); > + > + return ret; > +} > + > +static void dw_pcie_post_scale_bus_bw(struct pci_bus *bus, int current_speed) > +{ > + struct dw_pcie_rp *pp = bus->sysdata; > + > + if (pp->ops->pre_scale_bus_bw) > + pp->ops->post_scale_bus_bw(pp, current_speed); > +} > + > static struct pci_ops dw_pcie_ops = { > .map_bus = dw_pcie_own_conf_map_bus, > .read = pci_generic_config_read, > .write = pci_generic_config_write, > + .pre_scale_bus_bw = dw_pcie_pre_scale_bus_bw, > + .post_scale_bus_bw = dw_pcie_post_scale_bus_bw, Please do not add these multi level ops without necessity. Just populate the callbacks in qcom_pcie_host_init(). DWC has nothing to do with these callbacks. - Mani
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index ffaded8f2df7..4da4df62c3f8 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -697,10 +697,31 @@ void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, } EXPORT_SYMBOL_GPL(dw_pcie_own_conf_map_bus); +static int dw_pcie_pre_scale_bus_bw(struct pci_bus *bus, int target_speed) +{ + struct dw_pcie_rp *pp = bus->sysdata; + int ret = 0; + + if (pp->ops->pre_scale_bus_bw) + ret = pp->ops->pre_scale_bus_bw(pp, target_speed); + + return ret; +} + +static void dw_pcie_post_scale_bus_bw(struct pci_bus *bus, int current_speed) +{ + struct dw_pcie_rp *pp = bus->sysdata; + + if (pp->ops->pre_scale_bus_bw) + pp->ops->post_scale_bus_bw(pp, current_speed); +} + static struct pci_ops dw_pcie_ops = { .map_bus = dw_pcie_own_conf_map_bus, .read = pci_generic_config_read, .write = pci_generic_config_write, + .pre_scale_bus_bw = dw_pcie_pre_scale_bus_bw, + .post_scale_bus_bw = dw_pcie_post_scale_bus_bw, }; static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 501d9ddfea16..16e02646a8b4 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -354,6 +354,8 @@ struct dw_pcie_host_ops { void (*post_init)(struct dw_pcie_rp *pp); int (*msi_init)(struct dw_pcie_rp *pp); void (*pme_turn_off)(struct dw_pcie_rp *pp); + int (*pre_scale_bus_bw)(struct dw_pcie_rp *pp, int target_speed); + void (*post_scale_bus_bw)(struct dw_pcie_rp *pp, int current_speed); }; struct dw_pcie_rp {
Add support for pre_scale_bus_bw() & post_scale_bus_bw() function op's. Add support for DWC glue drivers to register for these ops. Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com> --- drivers/pci/controller/dwc/pcie-designware-host.c | 21 +++++++++++++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 2 ++ 2 files changed, 23 insertions(+)