On Thu, 5 Sep 2019 Jacky.Cao@xxxxxxxx wrote: > The power budget for SuperSpeed mode should be 900 mA > according to USB specification, so set the power budget > to 900mA for dummy_start_ss which is only used for > SuperSpeed mode. > > If the max power consumption of SuperSpeed device is > larger than 500 mA, insufficient available bus power > error happens in usb_choose_configuration function > when the device connects to dummy hcd. > > Signed-off-by: Jacky Cao <Jacky.Cao@xxxxxxxx> > --- > Changes in v3: > - Rename POWER_BUDGET_3_0 to POWER_BUDGET_3 > - Update commit message from USB3.0 specification to USB specification > > Changes in v2: > - Fix whitespace damage > > drivers/usb/gadget/udc/dummy_hcd.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c > index 8414fac..3d499d9 100644 > --- a/drivers/usb/gadget/udc/dummy_hcd.c > +++ b/drivers/usb/gadget/udc/dummy_hcd.c > @@ -48,6 +48,7 @@ > #define DRIVER_VERSION "02 May 2005" > > #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ > +#define POWER_BUDGET_3 900 /* in mA */ > > static const char driver_name[] = "dummy_hcd"; > static const char driver_desc[] = "USB Host+Gadget Emulator"; > @@ -2432,7 +2433,7 @@ static int dummy_start_ss(struct dummy_hcd *dum_hcd) > dum_hcd->rh_state = DUMMY_RH_RUNNING; > dum_hcd->stream_en_ep = 0; > INIT_LIST_HEAD(&dum_hcd->urbp_list); > - dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET; > + dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET_3; > dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING; > dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1; > #ifdef CONFIG_USB_OTG Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
