In case the uvc gadget is super speed plus, the corresponding config
descriptor wasn't initialized. As a result, the host will not recognize
the devices when using super speed plus connection.
This patch initializes them to super speed descriptors.
Signed-off-by: Shuzhen Wang <shuzhenwang@xxxxxxxxxx>
---
drivers/usb/gadget/function/f_uvc.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index faa398109431..786379f1b7b7 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -516,6 +516,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
void *mem;
switch (speed) {
+ case USB_SPEED_SUPER_PLUS:
case USB_SPEED_SUPER:
uvc_control_desc = uvc->desc.ss_control;
uvc_streaming_cls = uvc->desc.ss_streaming;
@@ -564,7 +565,8 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
bytes += uvc_interrupt_ep.bLength + uvc_interrupt_cs_ep.bLength;
n_desc += 2;
- if (speed == USB_SPEED_SUPER) {
+ if (speed == USB_SPEED_SUPER ||
+ speed == USB_SPEED_SUPER_PLUS) {
bytes += uvc_ss_interrupt_comp.bLength;
n_desc += 1;
}
@@ -619,7 +621,8 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
if (uvc->enable_interrupt_ep) {
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_interrupt_ep);
- if (speed == USB_SPEED_SUPER)
+ if (speed == USB_SPEED_SUPER ||
+ speed == USB_SPEED_SUPER_PLUS)
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_interrupt_comp);
UVC_COPY_DESCRIPTOR(mem, dst, &uvc_interrupt_cs_ep);
@@ -795,6 +798,13 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
goto error;
}
+ f->ssp_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER_PLUS);
+ if (IS_ERR(f->ssp_descriptors)) {
+ ret = PTR_ERR(f->ssp_descriptors);
+ f->ssp_descriptors = NULL;
+ goto error;
+ }
+
/* Preallocate control endpoint request. */
uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL);
--
