int drm_get_dev (struct pci_dev * pdev, const struct pci_device_id * ent, struct drm_driver * driver);
\param pdev - PCI device structure \param ent entry from the PCI ID table with device type flags \return zero on success or a negative number on failure.
Attempt to gets inter module ``drm'' information. If we are first then register the character device and inter module information. Try and register, if we fail to register, backout previous work.