1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2012 Red Hat
6 #include <linux/module.h>
8 #include <drm/drm_crtc_helper.h>
9 #include <drm/drm_drv.h>
10 #include <drm/drm_file.h>
11 #include <drm/drm_ioctl.h>
12 #include <drm/drm_probe_helper.h>
13 #include <drm/drm_print.h>
17 static int udl_usb_suspend(struct usb_interface *interface,
20 struct drm_device *dev = usb_get_intfdata(interface);
22 drm_kms_helper_poll_disable(dev);
26 static int udl_usb_resume(struct usb_interface *interface)
28 struct drm_device *dev = usb_get_intfdata(interface);
30 drm_kms_helper_poll_enable(dev);
31 udl_modeset_restore(dev);
35 static const struct vm_operations_struct udl_gem_vm_ops = {
36 .fault = udl_gem_fault,
37 .open = drm_gem_vm_open,
38 .close = drm_gem_vm_close,
41 static const struct file_operations udl_driver_fops = {
44 .mmap = udl_drm_gem_mmap,
47 .unlocked_ioctl = drm_ioctl,
48 .release = drm_release,
49 .compat_ioctl = drm_compat_ioctl,
50 .llseek = noop_llseek,
53 static void udl_driver_release(struct drm_device *dev)
56 udl_modeset_cleanup(dev);
61 static struct drm_driver driver = {
62 .driver_features = DRIVER_MODESET | DRIVER_GEM,
63 .release = udl_driver_release,
66 .gem_free_object_unlocked = udl_gem_free_object,
67 .gem_vm_ops = &udl_gem_vm_ops,
69 .dumb_create = udl_dumb_create,
70 .dumb_map_offset = udl_gem_mmap,
71 .fops = &udl_driver_fops,
73 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
74 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
75 .gem_prime_export = udl_gem_prime_export,
76 .gem_prime_import = udl_gem_prime_import,
81 .major = DRIVER_MAJOR,
82 .minor = DRIVER_MINOR,
83 .patchlevel = DRIVER_PATCHLEVEL,
86 static struct udl_device *udl_driver_create(struct usb_interface *interface)
88 struct usb_device *udev = interface_to_usbdev(interface);
89 struct udl_device *udl;
92 udl = kzalloc(sizeof(*udl), GFP_KERNEL);
94 return ERR_PTR(-ENOMEM);
96 r = drm_dev_init(&udl->drm, &driver, &interface->dev);
103 udl->drm.dev_private = udl;
107 drm_dev_fini(&udl->drm);
112 usb_set_intfdata(interface, udl);
116 static int udl_usb_probe(struct usb_interface *interface,
117 const struct usb_device_id *id)
120 struct udl_device *udl;
122 udl = udl_driver_create(interface);
126 r = drm_dev_register(&udl->drm, 0);
130 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
135 drm_dev_put(&udl->drm);
139 static void udl_usb_disconnect(struct usb_interface *interface)
141 struct drm_device *dev = usb_get_intfdata(interface);
143 drm_kms_helper_poll_disable(dev);
144 udl_fbdev_unplug(dev);
151 * There are many DisplayLink-based graphics products, all with unique PIDs.
152 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
153 * We also require a match on SubClass (0x00) and Protocol (0x00),
154 * which is compatible with all known USB 2.0 era graphics chips and firmware,
155 * but allows DisplayLink to increment those for any future incompatible chips
157 static const struct usb_device_id id_table[] = {
158 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
159 .bInterfaceSubClass = 0x00,
160 .bInterfaceProtocol = 0x00,
161 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
162 USB_DEVICE_ID_MATCH_INT_CLASS |
163 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
164 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
167 MODULE_DEVICE_TABLE(usb, id_table);
169 static struct usb_driver udl_driver = {
171 .probe = udl_usb_probe,
172 .disconnect = udl_usb_disconnect,
173 .suspend = udl_usb_suspend,
174 .resume = udl_usb_resume,
175 .id_table = id_table,
177 module_usb_driver(udl_driver);
178 MODULE_LICENSE("GPL");