[RFC PATCH v2 3/5] media: uvcvideo change to use Media Device Allocator API

[Shuah Khan]

Change uvcvideo to use Media Device Allocator API and new Media Controller
media_device_unregister_put() interface.

Signed-off-by: Shuah Khan <shua...@osg.samsung.com>
---
 drivers/media/usb/uvc/uvc_driver.c | 36 ++++++++++++++++++++++--------------
 drivers/media/usb/uvc/uvcvideo.h   |  3 ++-
 2 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_driver.c 
b/drivers/media/usb/uvc/uvc_driver.c
index 451e84e9..95e30c4 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1674,9 +1674,10 @@ static void uvc_delete(struct uvc_device *dev)
        if (dev->vdev.dev)
                v4l2_device_unregister(&dev->vdev);
 #ifdef CONFIG_MEDIA_CONTROLLER
-       if (media_devnode_is_registered(&dev->mdev.devnode))
-               media_device_unregister(&dev->mdev);
-       media_device_cleanup(&dev->mdev);
+       if (media_devnode_is_registered(&dev->mdev->devnode)) {
+               media_device_unregister_put(dev->mdev);
+               media_device_put(dev->mdev->dev);
+       }
 #endif
 
        list_for_each_safe(p, n, &dev->chains) {
@@ -1929,17 +1930,20 @@ static int uvc_probe(struct usb_interface *intf,
 
        /* Initialize the media device and register the V4L2 device. */
 #ifdef CONFIG_MEDIA_CONTROLLER
-       dev->mdev.dev = &intf->dev;
-       strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
+       dev->mdev = media_device_get(&intf->dev);
+       if (!dev->mdev)
+               goto media_device_get_error;
+       dev->mdev->dev = &intf->dev;
+       strlcpy(dev->mdev->model, dev->name, sizeof(dev->mdev->model));
        if (udev->serial)
-               strlcpy(dev->mdev.serial, udev->serial,
-                       sizeof(dev->mdev.serial));
-       strcpy(dev->mdev.bus_info, udev->devpath);
-       dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
-       dev->mdev.driver_version = LINUX_VERSION_CODE;
-       media_device_init(&dev->mdev);
-
-       dev->vdev.mdev = &dev->mdev;
+               strlcpy(dev->mdev->serial, udev->serial,
+                       sizeof(dev->mdev->serial));
+       strcpy(dev->mdev->bus_info, udev->devpath);
+       dev->mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
+       dev->mdev->driver_version = LINUX_VERSION_CODE;
+       media_device_init(dev->mdev);
+
+       dev->vdev.mdev = dev->mdev;
 #endif
        if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
                goto error;
@@ -1958,7 +1962,7 @@ static int uvc_probe(struct usb_interface *intf,
 
 #ifdef CONFIG_MEDIA_CONTROLLER
        /* Register the media device node */
-       if (media_device_register(&dev->mdev) < 0)
+       if (media_device_register(dev->mdev) < 0)
                goto error;
 #endif
        /* Save our data pointer in the interface data. */
@@ -1976,6 +1980,10 @@ static int uvc_probe(struct usb_interface *intf,
        return 0;
 
 error:
+#ifdef CONFIG_MEDIA_CONTROLLER
+       media_device_put(&intf->dev);
+media_device_get_error:
+#endif
        uvc_unregister_video(dev);
        return -ENODEV;
 }
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 7e4d3ee..a5ef719 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -12,6 +12,7 @@
 #include <linux/uvcvideo.h>
 #include <linux/videodev2.h>
 #include <media/media-device.h>
+#include <media/media-dev-allocator.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-event.h>
 #include <media/v4l2-fh.h>
@@ -543,7 +544,7 @@ struct uvc_device {
 
        /* Video control interface */
 #ifdef CONFIG_MEDIA_CONTROLLER
-       struct media_device mdev;
+       struct media_device *mdev;
 #endif
        struct v4l2_device vdev;
        __u16 uvc_version;
-- 
2.5.0