1 files changed, 30 insertions, 4 deletions

diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h
index 100475b1363e..9e79cbe50715 100644
--- a/drivers/usb/gadget/function/uvc.h
+++ b/drivers/usb/gadget/function/uvc.h
@@ -71,6 +71,11 @@ extern unsigned int uvc_gadget_trace_param;
 
 #define UVCG_REQUEST_HEADER_LEN			12
 
+#define UVCG_REQ_MAX_INT_COUNT			16
+#define UVCG_REQ_MAX_ZERO_COUNT			(2 * UVCG_REQ_MAX_INT_COUNT)
+
+#define UVCG_STREAMING_MIN_BUFFERS		2
+
 /* ------------------------------------------------------------------------
  * Structures
  */
@@ -81,6 +86,7 @@ struct uvc_request {
 	struct sg_table sgt;
 	u8 header[UVCG_REQUEST_HEADER_LEN];
 	struct uvc_buffer *last_buf;
+	struct list_head list;
 };
 
 struct uvc_video {
@@ -90,20 +96,37 @@ struct uvc_video {
 	struct work_struct pump;
 	struct workqueue_struct *async_wq;
 
+	struct kthread_worker   *kworker;
+	struct kthread_work     hw_submit;
+
+	atomic_t queued;
+
 	/* Frame parameters */
 	u8 bpp;
 	u32 fcc;
 	unsigned int width;
 	unsigned int height;
 	unsigned int imagesize;
+	unsigned int interval;
 	struct mutex mutex;	/* protects frame parameters */
 
 	unsigned int uvc_num_requests;
 
+	unsigned int reqs_per_frame;
+
 	/* Requests */
+	bool is_enabled; /* tracks whether video stream is enabled */
 	unsigned int req_size;
-	struct uvc_request *ureq;
+	struct list_head ureqs; /* all uvc_requests allocated by uvc_video */
+
+	/* USB requests that the video pump thread can encode into */
 	struct list_head req_free;
+
+	/*
+	 * USB requests video pump thread has already encoded into. These are
+	 * ready to be queued to the endpoint.
+	 */
+	struct list_head req_ready;
 	spinlock_t req_lock;
 
 	unsigned int req_int_count;
@@ -173,13 +196,16 @@ struct uvc_file_handle {
 #define to_uvc_file_handle(handle) \
 	container_of(handle, struct uvc_file_handle, vfh)
 
+static inline struct uvc_file_handle *file_to_uvc_file_handle(struct file *filp)
+{
+	return container_of(file_to_v4l2_fh(filp), struct uvc_file_handle, vfh);
+}
+
 /* ------------------------------------------------------------------------
  * Functions
  */
 
-extern void uvc_function_setup_continue(struct uvc_device *uvc);
-extern void uvc_endpoint_stream(struct uvc_device *dev);
-
+extern void uvc_function_setup_continue(struct uvc_device *uvc, int disable_ep);
 extern void uvc_function_connect(struct uvc_device *uvc);
 extern void uvc_function_disconnect(struct uvc_device *uvc);