summaryrefslogtreecommitdiff
path: root/drivers/usb/gadget/function/f_uvc.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/gadget/function/f_uvc.c')
-rw-r--r--drivers/usb/gadget/function/f_uvc.c109
1 files changed, 66 insertions, 43 deletions
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index 5e919fb65833..aa6ab666741a 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -263,10 +263,13 @@ uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
return 0;
}
-void uvc_function_setup_continue(struct uvc_device *uvc)
+void uvc_function_setup_continue(struct uvc_device *uvc, int disable_ep)
{
struct usb_composite_dev *cdev = uvc->func.config->cdev;
+ if (disable_ep && uvc->video.ep)
+ usb_ep_disable(uvc->video.ep);
+
usb_composite_setup_continue(cdev);
}
@@ -337,15 +340,11 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
if (uvc->state != UVC_STATE_STREAMING)
return 0;
- if (uvc->video.ep)
- usb_ep_disable(uvc->video.ep);
-
memset(&v4l2_event, 0, sizeof(v4l2_event));
v4l2_event.type = UVC_EVENT_STREAMOFF;
v4l2_event_queue(&uvc->vdev, &v4l2_event);
- uvc->state = UVC_STATE_CONNECTED;
- return 0;
+ return USB_GADGET_DELAYED_STATUS;
case 1:
if (uvc->state != UVC_STATE_CONNECTED)
@@ -466,7 +465,7 @@ uvc_register_video(struct uvc_device *uvc)
memcpy(mem, desc, (desc)->bLength); \
*(dst)++ = mem; \
mem += (desc)->bLength; \
- } while (0);
+ } while (0)
#define UVC_COPY_DESCRIPTORS(mem, dst, src) \
do { \
@@ -516,6 +515,7 @@ 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 +564,8 @@ 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 +620,8 @@ 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);
@@ -719,6 +721,14 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
}
uvc->enable_interrupt_ep = opts->enable_interrupt_ep;
+ /*
+ * gadget_is_{super|dual}speed() API check UDC controller capitblity. It should pass down
+ * highest speed endpoint descriptor to UDC controller. So UDC controller driver can reserve
+ * enough resource at check_config(), especially mult and maxburst. So UDC driver (such as
+ * cdns3) can know need at least (mult + 1) * (maxburst + 1) * wMaxPacketSize internal
+ * memory for this uvc functions. This is the only straightforward method to resolve the UDC
+ * resource allocation issue in the current gadget framework.
+ */
if (gadget_is_superspeed(c->cdev->gadget))
ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep,
&uvc_ss_streaming_comp);
@@ -788,21 +798,26 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
f->fs_descriptors = NULL;
goto error;
}
- if (gadget_is_dualspeed(cdev->gadget)) {
- f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
- if (IS_ERR(f->hs_descriptors)) {
- ret = PTR_ERR(f->hs_descriptors);
- f->hs_descriptors = NULL;
- goto error;
- }
+
+ f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
+ if (IS_ERR(f->hs_descriptors)) {
+ ret = PTR_ERR(f->hs_descriptors);
+ f->hs_descriptors = NULL;
+ goto error;
}
- if (gadget_is_superspeed(c->cdev->gadget)) {
- f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
- if (IS_ERR(f->ss_descriptors)) {
- ret = PTR_ERR(f->ss_descriptors);
- f->ss_descriptors = NULL;
- goto error;
- }
+
+ f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
+ if (IS_ERR(f->ss_descriptors)) {
+ ret = PTR_ERR(f->ss_descriptors);
+ f->ss_descriptors = NULL;
+ 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. */
@@ -960,7 +975,8 @@ static void uvc_free(struct usb_function *f)
struct uvc_device *uvc = to_uvc(f);
struct f_uvc_opts *opts = container_of(f->fi, struct f_uvc_opts,
func_inst);
- config_item_put(&uvc->header->item);
+ if (!opts->header)
+ config_item_put(&uvc->header->item);
--opts->refcnt;
kfree(uvc);
}
@@ -975,6 +991,8 @@ static void uvc_function_unbind(struct usb_configuration *c,
uvcg_info(f, "%s()\n", __func__);
+ kthread_cancel_work_sync(&video->hw_submit);
+
if (video->async_wq)
destroy_workqueue(video->async_wq);
@@ -1052,25 +1070,29 @@ static struct usb_function *uvc_alloc(struct usb_function_instance *fi)
uvc->desc.hs_streaming = opts->hs_streaming;
uvc->desc.ss_streaming = opts->ss_streaming;
- streaming = config_group_find_item(&opts->func_inst.group, "streaming");
- if (!streaming)
- goto err_config;
-
- header = config_group_find_item(to_config_group(streaming), "header");
- config_item_put(streaming);
- if (!header)
- goto err_config;
-
- h = config_group_find_item(to_config_group(header), "h");
- config_item_put(header);
- if (!h)
- goto err_config;
-
- uvc->header = to_uvcg_streaming_header(h);
- if (!uvc->header->linked) {
- mutex_unlock(&opts->lock);
- kfree(uvc);
- return ERR_PTR(-EBUSY);
+ if (opts->header) {
+ uvc->header = opts->header;
+ } else {
+ streaming = config_group_find_item(&opts->func_inst.group, "streaming");
+ if (!streaming)
+ goto err_config;
+
+ header = config_group_find_item(to_config_group(streaming), "header");
+ config_item_put(streaming);
+ if (!header)
+ goto err_config;
+
+ h = config_group_find_item(to_config_group(header), "h");
+ config_item_put(header);
+ if (!h)
+ goto err_config;
+
+ uvc->header = to_uvcg_streaming_header(h);
+ if (!uvc->header->linked) {
+ mutex_unlock(&opts->lock);
+ kfree(uvc);
+ return ERR_PTR(-EBUSY);
+ }
}
uvc->desc.extension_units = &opts->extension_units;
@@ -1098,5 +1120,6 @@ err_config:
}
DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc);
+MODULE_DESCRIPTION("USB Video Class Gadget driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Laurent Pinchart");
generated by cgit (git 2.34.1) at 2025-12-24 22:32:19 +0000