On Thu, Jan 21, 2021 at 08:01:37PM -0800, Wesley Cheng wrote:
> Some UDCs may have constraints on how many high bandwidth endpoints it can
> support in a certain configuration. This API allows for the composite
> driver to pass down the total number of endpoints to the UDC so it can verify
> it has the required resources to support the configuration.
>
> Signed-off-by: Wesley Cheng <[email protected]>
> --- a/include/linux/usb/gadget.h
> +++ b/include/linux/usb/gadget.h
> @@ -328,6 +328,7 @@ struct usb_gadget_ops {
> struct usb_ep *(*match_ep)(struct usb_gadget *,
> struct usb_endpoint_descriptor *,
> struct usb_ss_ep_comp_descriptor *);
> + int (*check_config)(struct usb_gadget *gadget, unsigned long
> ep_map);
> };
>
> /**
> @@ -607,6 +608,7 @@ int usb_gadget_connect(struct usb_gadget *gadget);
> int usb_gadget_disconnect(struct usb_gadget *gadget);
> int usb_gadget_deactivate(struct usb_gadget *gadget);
> int usb_gadget_activate(struct usb_gadget *gadget);
> +int usb_gadget_check_config(struct usb_gadget *gadget, unsigned long ep_map);
> #else
> static inline int usb_gadget_frame_number(struct usb_gadget *gadget)
> { return 0; }
Don't you also need an entry for the case where CONFIG_USB_GADGET isn't
enabled?
Alan Stern
