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_probe_helper.h>
12 static int udl_usb_suspend(struct usb_interface *interface,
15 struct drm_device *dev = usb_get_intfdata(interface);
17 drm_kms_helper_poll_disable(dev);
21 static int udl_usb_resume(struct usb_interface *interface)
23 struct drm_device *dev = usb_get_intfdata(interface);
25 drm_kms_helper_poll_enable(dev);
26 udl_modeset_restore(dev);
30 static const struct vm_operations_struct udl_gem_vm_ops = {
31 .fault = udl_gem_fault,
32 .open = drm_gem_vm_open,
33 .close = drm_gem_vm_close,
36 static const struct file_operations udl_driver_fops = {
39 .mmap = udl_drm_gem_mmap,
42 .unlocked_ioctl = drm_ioctl,
43 .release = drm_release,
44 .compat_ioctl = drm_compat_ioctl,
45 .llseek = noop_llseek,
48 static void udl_driver_release(struct drm_device *dev)
51 udl_modeset_cleanup(dev);
56 static struct drm_driver driver = {
57 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
58 .release = udl_driver_release,
61 .gem_free_object_unlocked = udl_gem_free_object,
62 .gem_vm_ops = &udl_gem_vm_ops,
64 .dumb_create = udl_dumb_create,
65 .dumb_map_offset = udl_gem_mmap,
66 .fops = &udl_driver_fops,
68 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
69 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
70 .gem_prime_export = udl_gem_prime_export,
71 .gem_prime_import = udl_gem_prime_import,
76 .major = DRIVER_MAJOR,
77 .minor = DRIVER_MINOR,
78 .patchlevel = DRIVER_PATCHLEVEL,
81 static struct udl_device *udl_driver_create(struct usb_interface *interface)
83 struct usb_device *udev = interface_to_usbdev(interface);
84 struct udl_device *udl;
87 udl = kzalloc(sizeof(*udl), GFP_KERNEL);
89 return ERR_PTR(-ENOMEM);
91 r = drm_dev_init(&udl->drm, &driver, &interface->dev);
98 udl->drm.dev_private = udl;
102 drm_dev_fini(&udl->drm);
107 usb_set_intfdata(interface, udl);
111 static int udl_usb_probe(struct usb_interface *interface,
112 const struct usb_device_id *id)
115 struct udl_device *udl;
117 udl = udl_driver_create(interface);
121 r = drm_dev_register(&udl->drm, 0);
125 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
130 drm_dev_put(&udl->drm);
134 static void udl_usb_disconnect(struct usb_interface *interface)
136 struct drm_device *dev = usb_get_intfdata(interface);
138 drm_kms_helper_poll_disable(dev);
139 udl_fbdev_unplug(dev);
146 * There are many DisplayLink-based graphics products, all with unique PIDs.
147 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
148 * We also require a match on SubClass (0x00) and Protocol (0x00),
149 * which is compatible with all known USB 2.0 era graphics chips and firmware,
150 * but allows DisplayLink to increment those for any future incompatible chips
152 static const struct usb_device_id id_table[] = {
153 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
154 .bInterfaceSubClass = 0x00,
155 .bInterfaceProtocol = 0x00,
156 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
157 USB_DEVICE_ID_MATCH_INT_CLASS |
158 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
159 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
162 MODULE_DEVICE_TABLE(usb, id_table);
164 static struct usb_driver udl_driver = {
166 .probe = udl_usb_probe,
167 .disconnect = udl_usb_disconnect,
168 .suspend = udl_usb_suspend,
169 .resume = udl_usb_resume,
170 .id_table = id_table,
172 module_usb_driver(udl_driver);
173 MODULE_LICENSE("GPL");