From 62e370785cb337981999ac7ec364e22ffb6c2cd3 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@ti.com>
Date: Mon, 29 Sep 2014 13:41:04 -0500
Subject: [PATCH] usb: gadget: function: uvc: manage our video control endpoint
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(+)
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index 4138ad5adb77..413a09f366c4 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;
--
2.34.1