drm: add usb framework

This adds an initial framework to plug USB graphics devices
into the drm/kms subsystem.

I've started writing a displaylink driver using this interface.

Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index a99aefb9537c..52a2fd2f7789 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -925,6 +925,7 @@ struct drm_driver {
         union {
                 struct pci_driver *pci;
                 struct platform_device *platform_device;
+                struct usb_driver *usb;
         } kdriver;
         struct drm_bus *bus;
 
@@ -1130,6 +1131,7 @@ struct drm_device {
 #endif
 
         struct platform_device *platformdev; /**< Platform device struture */
+        struct usb_device *usbdev;
 
         struct drm_sg_mem *sg;  /**< Scatter gather memory */
         int num_crtcs;                  /**< Number of CRTCs on this device */
diff --git a/include/drm/drm_usb.h b/include/drm/drm_usb.h
new file mode 100644
index 000000000000..33506c11da8b
--- /dev/null
+++ b/include/drm/drm_usb.h
@@ -0,0 +1,15 @@
+#ifndef DRM_USB_H
+#define DRM_USB_H
+
+#include <drmP.h>
+
+#include <linux/usb.h>
+
+extern int drm_usb_init(struct drm_driver *driver, struct usb_driver *udriver);
+extern void drm_usb_exit(struct drm_driver *driver, struct usb_driver *udriver);
+
+int drm_get_usb_dev(struct usb_interface *interface,
+                    const struct usb_device_id *id,
+                    struct drm_driver *driver);
+
+#endif