From: Hans Verkuil <hverk...@xs4all.nl>

When uvc was written the vb2 ioctl and file operation helpers didn't exist.

This patch switches uvc over to those helpers, which removes a lot of 
boilerplate
code and simplifies VIDIOC_G/S_PRIORITY handling and allows us to drop the
'privileges' scheme, since that's now handled inside the vb2 helpers.

This makes it possible for uvc to pass the v4l2-compliance streaming tests.

Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
---
 drivers/media/usb/uvc/uvc_driver.c   |   7 +-
 drivers/media/usb/uvc/uvc_metadata.c |   8 +-
 drivers/media/usb/uvc/uvc_queue.c    | 143 -------------
 drivers/media/usb/uvc/uvc_v4l2.c     | 288 ++-------------------------
 drivers/media/usb/uvc/uvcvideo.h     |  32 ---
 5 files changed, 25 insertions(+), 453 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_driver.c 
b/drivers/media/usb/uvc/uvc_driver.c
index 76ab6acecbc9..1a38ea31e218 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1911,7 +1911,6 @@ static struct uvc_video_chain *uvc_alloc_chain(struct 
uvc_device *dev)
        INIT_LIST_HEAD(&chain->entities);
        mutex_init(&chain->ctrl_mutex);
        chain->dev = dev;
-       v4l2_prio_init(&chain->prio);
 
        return chain;
 }
@@ -2181,7 +2180,7 @@ int uvc_register_video_device(struct uvc_device *dev,
        vdev->fops = fops;
        vdev->ioctl_ops = ioctl_ops;
        vdev->release = uvc_release;
-       vdev->prio = &stream->chain->prio;
+       vdev->queue = &queue->queue;
        if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
                vdev->vfl_dir = VFL_DIR_TX;
        else
@@ -2546,8 +2545,8 @@ static int __uvc_resume(struct usb_interface *intf, int 
reset)
                if (stream->intf == intf) {
                        ret = uvc_video_resume(stream, reset);
                        if (ret < 0)
-                               uvc_queue_streamoff(&stream->queue,
-                                                   stream->queue.queue.type);
+                               vb2_streamoff(&stream->queue.queue,
+                                             stream->queue.queue.type);
                        return ret;
                }
        }
diff --git a/drivers/media/usb/uvc/uvc_metadata.c 
b/drivers/media/usb/uvc/uvc_metadata.c
index b6279ad7ac84..849d8e5ab75d 100644
--- a/drivers/media/usb/uvc/uvc_metadata.c
+++ b/drivers/media/usb/uvc/uvc_metadata.c
@@ -96,7 +96,7 @@ static int uvc_meta_v4l2_set_format(struct file *file, void 
*fh,
         */
        mutex_lock(&stream->mutex);
 
-       if (uvc_queue_allocated(&stream->queue))
+       if (vb2_is_busy(&stream->meta.queue.queue))
                ret = -EBUSY;
        else
                stream->meta.format = fmt->dataformat;
@@ -164,12 +164,6 @@ int uvc_meta_register(struct uvc_streaming *stream)
 
        stream->meta.format = V4L2_META_FMT_UVC;
 
-       /*
-        * The video interface queue uses manual locking and thus does not set
-        * the queue pointer. Set it manually here.
-        */
-       vdev->queue = &queue->queue;
-
        return uvc_register_video_device(dev, stream, vdev, queue,
                                         V4L2_BUF_TYPE_META_CAPTURE,
                                         &uvc_meta_fops, &uvc_meta_ioctl_ops);
diff --git a/drivers/media/usb/uvc/uvc_queue.c 
b/drivers/media/usb/uvc/uvc_queue.c
index 21a907d32bb7..437e48b32480 100644
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -247,153 +247,10 @@ int uvc_queue_init(struct uvc_video_queue *queue, enum 
v4l2_buf_type type,
        return 0;
 }
 
-void uvc_queue_release(struct uvc_video_queue *queue)
-{
-       mutex_lock(&queue->mutex);
-       vb2_queue_release(&queue->queue);
-       mutex_unlock(&queue->mutex);
-}
-
-/* 
-----------------------------------------------------------------------------
- * V4L2 queue operations
- */
-
-int uvc_request_buffers(struct uvc_video_queue *queue,
-                       struct v4l2_requestbuffers *rb)
-{
-       int ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_reqbufs(&queue->queue, rb);
-       mutex_unlock(&queue->mutex);
-
-       return ret ? ret : rb->count;
-}
-
-int uvc_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
-{
-       int ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_querybuf(&queue->queue, buf);
-       mutex_unlock(&queue->mutex);
-
-       return ret;
-}
-
-int uvc_create_buffers(struct uvc_video_queue *queue,
-                      struct v4l2_create_buffers *cb)
-{
-       int ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_create_bufs(&queue->queue, cb);
-       mutex_unlock(&queue->mutex);
-
-       return ret;
-}
-
-int uvc_queue_buffer(struct uvc_video_queue *queue,
-                    struct media_device *mdev, struct v4l2_buffer *buf)
-{
-       int ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_qbuf(&queue->queue, mdev, buf);
-       mutex_unlock(&queue->mutex);
-
-       return ret;
-}
-
-int uvc_export_buffer(struct uvc_video_queue *queue,
-                     struct v4l2_exportbuffer *exp)
-{
-       int ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_expbuf(&queue->queue, exp);
-       mutex_unlock(&queue->mutex);
-
-       return ret;
-}
-
-int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf,
-                      int nonblocking)
-{
-       int ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_dqbuf(&queue->queue, buf, nonblocking);
-       mutex_unlock(&queue->mutex);
-
-       return ret;
-}
-
-int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type)
-{
-       int ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_streamon(&queue->queue, type);
-       mutex_unlock(&queue->mutex);
-
-       return ret;
-}
-
-int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type)
-{
-       int ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_streamoff(&queue->queue, type);
-       mutex_unlock(&queue->mutex);
-
-       return ret;
-}
-
-int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
-{
-       return vb2_mmap(&queue->queue, vma);
-}
-
-#ifndef CONFIG_MMU
-unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
-               unsigned long pgoff)
-{
-       return vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
-}
-#endif
-
-__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
-                           poll_table *wait)
-{
-       __poll_t ret;
-
-       mutex_lock(&queue->mutex);
-       ret = vb2_poll(&queue->queue, file, wait);
-       mutex_unlock(&queue->mutex);
-
-       return ret;
-}
-
 /* 
-----------------------------------------------------------------------------
  *
  */
 
-/*
- * Check if buffers have been allocated.
- */
-int uvc_queue_allocated(struct uvc_video_queue *queue)
-{
-       int allocated;
-
-       mutex_lock(&queue->mutex);
-       allocated = vb2_is_busy(&queue->queue);
-       mutex_unlock(&queue->mutex);
-
-       return allocated;
-}
-
 /*
  * Cancel the video buffers queue.
  *
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 74d862c358fd..a5454bcc3feb 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -352,17 +352,13 @@ static int uvc_v4l2_set_format(struct uvc_streaming 
*stream,
                return ret;
 
        mutex_lock(&stream->mutex);
-
-       if (uvc_queue_allocated(&stream->queue)) {
+       if (vb2_is_busy(&stream->queue.queue)) {
                ret = -EBUSY;
-               goto done;
+       } else {
+               stream->ctrl = probe;
+               stream->cur_format = format;
+               stream->cur_frame = frame;
        }
-
-       stream->ctrl = probe;
-       stream->cur_format = format;
-       stream->cur_frame = frame;
-
-done:
        mutex_unlock(&stream->mutex);
        return ret;
 }
@@ -489,62 +485,6 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming 
*stream,
        return 0;
 }
 
-/* ------------------------------------------------------------------------
- * Privilege management
- */
-
-/*
- * Privilege management is the multiple-open implementation basis. The current
- * implementation is completely transparent for the end-user and doesn't
- * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
- * Those ioctls enable finer control on the device (by making possible for a
- * user to request exclusive access to a device), but are not mature yet.
- * Switching to the V4L2 priority mechanism might be considered in the future
- * if this situation changes.
- *
- * Each open instance of a UVC device can either be in a privileged or
- * unprivileged state. Only a single instance can be in a privileged state at
- * a given time. Trying to perform an operation that requires privileges will
- * automatically acquire the required privileges if possible, or return -EBUSY
- * otherwise. Privileges are dismissed when closing the instance or when
- * freeing the video buffers using VIDIOC_REQBUFS.
- *
- * Operations that require privileges are:
- *
- * - VIDIOC_S_INPUT
- * - VIDIOC_S_PARM
- * - VIDIOC_S_FMT
- * - VIDIOC_REQBUFS
- */
-static int uvc_acquire_privileges(struct uvc_fh *handle)
-{
-       /* Always succeed if the handle is already privileged. */
-       if (handle->state == UVC_HANDLE_ACTIVE)
-               return 0;
-
-       /* Check if the device already has a privileged handle. */
-       if (atomic_inc_return(&handle->stream->active) != 1) {
-               atomic_dec(&handle->stream->active);
-               return -EBUSY;
-       }
-
-       handle->state = UVC_HANDLE_ACTIVE;
-       return 0;
-}
-
-static void uvc_dismiss_privileges(struct uvc_fh *handle)
-{
-       if (handle->state == UVC_HANDLE_ACTIVE)
-               atomic_dec(&handle->stream->active);
-
-       handle->state = UVC_HANDLE_PASSIVE;
-}
-
-static int uvc_has_privileges(struct uvc_fh *handle)
-{
-       return handle->state == UVC_HANDLE_ACTIVE;
-}
-
 /* ------------------------------------------------------------------------
  * V4L2 file operations
  */
@@ -587,7 +527,6 @@ static int uvc_v4l2_open(struct file *file)
        v4l2_fh_add(&handle->vfh);
        handle->chain = stream->chain;
        handle->stream = stream;
-       handle->state = UVC_HANDLE_PASSIVE;
        file->private_data = handle;
 
        return 0;
@@ -600,15 +539,8 @@ static int uvc_v4l2_release(struct file *file)
 
        uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
 
-       /* Only free resources if this is a privileged handle. */
-       if (uvc_has_privileges(handle))
-               uvc_queue_release(&stream->queue);
-
        /* Release the file handle. */
-       uvc_dismiss_privileges(handle);
-       v4l2_fh_del(&handle->vfh);
-       v4l2_fh_exit(&handle->vfh);
-       kfree(handle);
+       vb2_fop_release(file);
        file->private_data = NULL;
 
        mutex_lock(&stream->dev->lock);
@@ -701,11 +633,6 @@ static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void 
*fh,
 {
        struct uvc_fh *handle = fh;
        struct uvc_streaming *stream = handle->stream;
-       int ret;
-
-       ret = uvc_acquire_privileges(handle);
-       if (ret < 0)
-               return ret;
 
        return uvc_v4l2_set_format(stream, fmt);
 }
@@ -715,11 +642,6 @@ static int uvc_ioctl_s_fmt_vid_out(struct file *file, void 
*fh,
 {
        struct uvc_fh *handle = fh;
        struct uvc_streaming *stream = handle->stream;
-       int ret;
-
-       ret = uvc_acquire_privileges(handle);
-       if (ret < 0)
-               return ret;
 
        return uvc_v4l2_set_format(stream, fmt);
 }
@@ -744,124 +666,6 @@ static int uvc_ioctl_try_fmt_vid_out(struct file *file, 
void *fh,
        return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
 }
 
-static int uvc_ioctl_reqbufs(struct file *file, void *fh,
-                            struct v4l2_requestbuffers *rb)
-{
-       struct uvc_fh *handle = fh;
-       struct uvc_streaming *stream = handle->stream;
-       int ret;
-
-       ret = uvc_acquire_privileges(handle);
-       if (ret < 0)
-               return ret;
-
-       mutex_lock(&stream->mutex);
-       ret = uvc_request_buffers(&stream->queue, rb);
-       mutex_unlock(&stream->mutex);
-       if (ret < 0)
-               return ret;
-
-       if (ret == 0)
-               uvc_dismiss_privileges(handle);
-
-       return 0;
-}
-
-static int uvc_ioctl_querybuf(struct file *file, void *fh,
-                             struct v4l2_buffer *buf)
-{
-       struct uvc_fh *handle = fh;
-       struct uvc_streaming *stream = handle->stream;
-
-       if (!uvc_has_privileges(handle))
-               return -EBUSY;
-
-       return uvc_query_buffer(&stream->queue, buf);
-}
-
-static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
-{
-       struct uvc_fh *handle = fh;
-       struct uvc_streaming *stream = handle->stream;
-
-       if (!uvc_has_privileges(handle))
-               return -EBUSY;
-
-       return uvc_queue_buffer(&stream->queue,
-                               stream->vdev.v4l2_dev->mdev, buf);
-}
-
-static int uvc_ioctl_expbuf(struct file *file, void *fh,
-                           struct v4l2_exportbuffer *exp)
-{
-       struct uvc_fh *handle = fh;
-       struct uvc_streaming *stream = handle->stream;
-
-       if (!uvc_has_privileges(handle))
-               return -EBUSY;
-
-       return uvc_export_buffer(&stream->queue, exp);
-}
-
-static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer 
*buf)
-{
-       struct uvc_fh *handle = fh;
-       struct uvc_streaming *stream = handle->stream;
-
-       if (!uvc_has_privileges(handle))
-               return -EBUSY;
-
-       return uvc_dequeue_buffer(&stream->queue, buf,
-                                 file->f_flags & O_NONBLOCK);
-}
-
-static int uvc_ioctl_create_bufs(struct file *file, void *fh,
-                                 struct v4l2_create_buffers *cb)
-{
-       struct uvc_fh *handle = fh;
-       struct uvc_streaming *stream = handle->stream;
-       int ret;
-
-       ret = uvc_acquire_privileges(handle);
-       if (ret < 0)
-               return ret;
-
-       return uvc_create_buffers(&stream->queue, cb);
-}
-
-static int uvc_ioctl_streamon(struct file *file, void *fh,
-                             enum v4l2_buf_type type)
-{
-       struct uvc_fh *handle = fh;
-       struct uvc_streaming *stream = handle->stream;
-       int ret;
-
-       if (!uvc_has_privileges(handle))
-               return -EBUSY;
-
-       mutex_lock(&stream->mutex);
-       ret = uvc_queue_streamon(&stream->queue, type);
-       mutex_unlock(&stream->mutex);
-
-       return ret;
-}
-
-static int uvc_ioctl_streamoff(struct file *file, void *fh,
-                              enum v4l2_buf_type type)
-{
-       struct uvc_fh *handle = fh;
-       struct uvc_streaming *stream = handle->stream;
-
-       if (!uvc_has_privileges(handle))
-               return -EBUSY;
-
-       mutex_lock(&stream->mutex);
-       uvc_queue_streamoff(&stream->queue, type);
-       mutex_unlock(&stream->mutex);
-
-       return 0;
-}
-
 static int uvc_ioctl_enum_input(struct file *file, void *fh,
                                struct v4l2_input *input)
 {
@@ -929,13 +733,12 @@ static int uvc_ioctl_g_input(struct file *file, void *fh, 
unsigned int *input)
 static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input)
 {
        struct uvc_fh *handle = fh;
+       struct uvc_streaming *stream = handle->stream;
        struct uvc_video_chain *chain = handle->chain;
-       int ret;
        u32 i;
 
-       ret = uvc_acquire_privileges(handle);
-       if (ret < 0)
-               return ret;
+       if (vb2_is_busy(&stream->queue.queue))
+               return -EBUSY;
 
        if (chain->selector == NULL ||
            (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
@@ -1228,11 +1031,6 @@ static int uvc_ioctl_s_parm(struct file *file, void *fh,
 {
        struct uvc_fh *handle = fh;
        struct uvc_streaming *stream = handle->stream;
-       int ret;
-
-       ret = uvc_acquire_privileges(handle);
-       if (ret < 0)
-               return ret;
 
        return uvc_v4l2_set_streamparm(stream, parm);
 }
@@ -1500,50 +1298,6 @@ static long uvc_v4l2_compat_ioctl32(struct file *file,
 }
 #endif
 
-static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
-                   size_t count, loff_t *ppos)
-{
-       struct uvc_fh *handle = file->private_data;
-       struct uvc_streaming *stream = handle->stream;
-
-       uvc_dbg(stream->dev, CALLS, "%s: not implemented\n", __func__);
-       return -EINVAL;
-}
-
-static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
-{
-       struct uvc_fh *handle = file->private_data;
-       struct uvc_streaming *stream = handle->stream;
-
-       uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
-
-       return uvc_queue_mmap(&stream->queue, vma);
-}
-
-static __poll_t uvc_v4l2_poll(struct file *file, poll_table *wait)
-{
-       struct uvc_fh *handle = file->private_data;
-       struct uvc_streaming *stream = handle->stream;
-
-       uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
-
-       return uvc_queue_poll(&stream->queue, file, wait);
-}
-
-#ifndef CONFIG_MMU
-static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
-               unsigned long addr, unsigned long len, unsigned long pgoff,
-               unsigned long flags)
-{
-       struct uvc_fh *handle = file->private_data;
-       struct uvc_streaming *stream = handle->stream;
-
-       uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
-
-       return uvc_queue_get_unmapped_area(&stream->queue, pgoff);
-}
-#endif
-
 const struct v4l2_ioctl_ops uvc_ioctl_ops = {
        .vidioc_querycap = uvc_ioctl_querycap,
        .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap,
@@ -1554,14 +1308,15 @@ const struct v4l2_ioctl_ops uvc_ioctl_ops = {
        .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out,
        .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap,
        .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out,
-       .vidioc_reqbufs = uvc_ioctl_reqbufs,
-       .vidioc_querybuf = uvc_ioctl_querybuf,
-       .vidioc_qbuf = uvc_ioctl_qbuf,
-       .vidioc_expbuf = uvc_ioctl_expbuf,
-       .vidioc_dqbuf = uvc_ioctl_dqbuf,
-       .vidioc_create_bufs = uvc_ioctl_create_bufs,
-       .vidioc_streamon = uvc_ioctl_streamon,
-       .vidioc_streamoff = uvc_ioctl_streamoff,
+       .vidioc_reqbufs = vb2_ioctl_reqbufs,
+       .vidioc_querybuf = vb2_ioctl_querybuf,
+       .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+       .vidioc_qbuf = vb2_ioctl_qbuf,
+       .vidioc_expbuf = vb2_ioctl_expbuf,
+       .vidioc_dqbuf = vb2_ioctl_dqbuf,
+       .vidioc_create_bufs = vb2_ioctl_create_bufs,
+       .vidioc_streamon = vb2_ioctl_streamon,
+       .vidioc_streamoff = vb2_ioctl_streamoff,
        .vidioc_enum_input = uvc_ioctl_enum_input,
        .vidioc_g_input = uvc_ioctl_g_input,
        .vidioc_s_input = uvc_ioctl_s_input,
@@ -1591,11 +1346,10 @@ const struct v4l2_file_operations uvc_fops = {
 #ifdef CONFIG_COMPAT
        .compat_ioctl32 = uvc_v4l2_compat_ioctl32,
 #endif
-       .read           = uvc_v4l2_read,
-       .mmap           = uvc_v4l2_mmap,
-       .poll           = uvc_v4l2_poll,
+       .mmap           = vb2_fop_mmap,
+       .poll           = vb2_fop_poll,
 #ifndef CONFIG_MMU
-       .get_unmapped_area = uvc_v4l2_get_unmapped_area,
+       .get_unmapped_area = vb2_fop_get_unmapped_area,
 #endif
 };
 
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index dc20021f7ee0..bd28813c5649 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -477,7 +477,6 @@ struct uvc_video_chain {
 
        struct mutex ctrl_mutex;                /* Protects ctrl.info */
 
-       struct v4l2_prio_state prio;            /* V4L2 priority state */
        u32 caps;                               /* V4L2 chain-wide caps */
        u8 ctrl_class_bitmap;                   /* Bitmap of valid classes */
 };
@@ -714,16 +713,10 @@ struct uvc_device {
        struct uvc_entity *gpio_unit;
 };
 
-enum uvc_handle_state {
-       UVC_HANDLE_PASSIVE      = 0,
-       UVC_HANDLE_ACTIVE       = 1,
-};
-
 struct uvc_fh {
        struct v4l2_fh vfh;
        struct uvc_video_chain *chain;
        struct uvc_streaming *stream;
-       enum uvc_handle_state state;
 };
 
 struct uvc_driver {
@@ -788,36 +781,11 @@ struct uvc_entity *uvc_entity_by_id(struct uvc_device 
*dev, int id);
 /* Video buffers queue management. */
 int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
                   int drop_corrupted);
-void uvc_queue_release(struct uvc_video_queue *queue);
-int uvc_request_buffers(struct uvc_video_queue *queue,
-                       struct v4l2_requestbuffers *rb);
-int uvc_query_buffer(struct uvc_video_queue *queue,
-                    struct v4l2_buffer *v4l2_buf);
-int uvc_create_buffers(struct uvc_video_queue *queue,
-                      struct v4l2_create_buffers *v4l2_cb);
-int uvc_queue_buffer(struct uvc_video_queue *queue,
-                    struct media_device *mdev,
-                    struct v4l2_buffer *v4l2_buf);
-int uvc_export_buffer(struct uvc_video_queue *queue,
-                     struct v4l2_exportbuffer *exp);
-int uvc_dequeue_buffer(struct uvc_video_queue *queue,
-                      struct v4l2_buffer *v4l2_buf, int nonblocking);
-int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type);
-int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type 
type);
 void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
                                         struct uvc_buffer *buf);
 struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue);
 void uvc_queue_buffer_release(struct uvc_buffer *buf);
-int uvc_queue_mmap(struct uvc_video_queue *queue,
-                  struct vm_area_struct *vma);
-__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
-                       poll_table *wait);
-#ifndef CONFIG_MMU
-unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
-                                         unsigned long pgoff);
-#endif
-int uvc_queue_allocated(struct uvc_video_queue *queue);
 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 {
        return vb2_is_streaming(&queue->queue);
-- 
2.31.0.rc2.261.g7f71774620-goog

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