drm_dev_alloc — Allocate new DRM device
| struct drm_device * drm_dev_alloc ( | struct drm_driver * driver, | 
| struct device * parent ); | 
   Allocate and initialize a new DRM device. No device registration is done.
   Call drm_dev_register to advertice the device to user space and register it
   with other core subsystems.
   
   The initial ref-count of the object is 1. Use drm_dev_ref and
   drm_dev_unref to take and drop further ref-counts.
   
   Note that for purely virtual devices parent can be NULL.