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[10/28] usb: gadget: function: uvc: manage our video control endpoint

Message ID 1413565804-13061-11-git-send-email-balbi@ti.com
State Accepted
Commit 62e370785cb337981999ac7ec364e22ffb6c2cd3
Headers show

Commit Message

Felipe Balbi Oct. 17, 2014, 5:09 p.m. UTC 
just like any other endpoint, we must enable/disable
our video control endpoint based on calls to our
->set_alt() method.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/usb/gadget/function/f_uvc.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
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Patch

diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index 4138ad5..413a09f 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -297,6 +297,19 @@  uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
 		if (alt)
 			return -EINVAL;
 
+		if (uvc->control_ep->driver_data) {
+			INFO(cdev, "reset UVC Control\n");
+			usb_ep_disable(uvc->control_ep);
+			uvc->control_ep->driver_data = NULL;
+		}
+
+		if (!uvc->control_ep->desc)
+			if (config_ep_by_speed(cdev->gadget, f, uvc->control_ep))
+				return -EINVAL;
+
+		usb_ep_enable(uvc->control_ep);
+		uvc->control_ep->driver_data = uvc;
+
 		if (uvc->state == UVC_STATE_DISCONNECTED) {
 			memset(&v4l2_event, 0, sizeof(v4l2_event));
 			v4l2_event.type = UVC_EVENT_CONNECT;