diff options
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 12032f0488d8..71f097d89001 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -123,6 +123,24 @@ static inline void dwc2_gadget_incr_frame_num(struct dwc2_hsotg_ep *hs_ep) } /** + * dwc2_gadget_dec_frame_num_by_one - Decrements the targeted frame number + * by one. + * @hs_ep: The endpoint. + * + * This function used in service interval based scheduling flow to calculate + * descriptor frame number filed value. For service interval mode frame + * number in descriptor should point to last (u)frame in the interval. + * + */ +static inline void dwc2_gadget_dec_frame_num_by_one(struct dwc2_hsotg_ep *hs_ep) +{ + if (hs_ep->target_frame) + hs_ep->target_frame -= 1; + else + hs_ep->target_frame = DSTS_SOFFN_LIMIT; +} + +/** * dwc2_hsotg_en_gsint - enable one or more of the general interrupt * @hsotg: The device state * @ints: A bitmask of the interrupts to enable |