1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2012 Red Hat
4 */
5
6 #include <linux/module.h>
7
8 #include <drm/clients/drm_client_setup.h>
9 #include <drm/drm_drv.h>
10 #include <drm/drm_fbdev_shmem.h>
11 #include <drm/drm_file.h>
12 #include <drm/drm_gem_shmem_helper.h>
13 #include <drm/drm_managed.h>
14 #include <drm/drm_modeset_helper.h>
15 #include <drm/drm_ioctl.h>
16 #include <drm/drm_probe_helper.h>
17 #include <drm/drm_print.h>
18
19 #include "udl_drv.h"
20
udl_usb_suspend(struct usb_interface * interface,pm_message_t message)21 static int udl_usb_suspend(struct usb_interface *interface,
22 pm_message_t message)
23 {
24 struct drm_device *dev = usb_get_intfdata(interface);
25 struct udl_device *udl = to_udl(dev);
26 int ret;
27
28 ret = drm_mode_config_helper_suspend(dev);
29 if (ret)
30 return ret;
31
32 udl_sync_pending_urbs(udl);
33 return 0;
34 }
35
udl_usb_resume(struct usb_interface * interface)36 static int udl_usb_resume(struct usb_interface *interface)
37 {
38 struct drm_device *dev = usb_get_intfdata(interface);
39
40 return drm_mode_config_helper_resume(dev);
41 }
42
udl_usb_reset_resume(struct usb_interface * interface)43 static int udl_usb_reset_resume(struct usb_interface *interface)
44 {
45 struct drm_device *dev = usb_get_intfdata(interface);
46 struct udl_device *udl = to_udl(dev);
47
48 udl_select_std_channel(udl);
49
50 return drm_mode_config_helper_resume(dev);
51 }
52
53 DEFINE_DRM_GEM_FOPS(udl_driver_fops);
54
55 static const struct drm_driver driver = {
56 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
57
58 /* GEM hooks */
59 .fops = &udl_driver_fops,
60 DRM_GEM_SHMEM_DRIVER_OPS,
61 DRM_FBDEV_SHMEM_DRIVER_OPS,
62
63 .name = DRIVER_NAME,
64 .desc = DRIVER_DESC,
65 .major = DRIVER_MAJOR,
66 .minor = DRIVER_MINOR,
67 .patchlevel = DRIVER_PATCHLEVEL,
68 };
69
udl_driver_create(struct usb_interface * interface)70 static struct udl_device *udl_driver_create(struct usb_interface *interface)
71 {
72 struct udl_device *udl;
73 int r;
74
75 udl = devm_drm_dev_alloc(&interface->dev, &driver,
76 struct udl_device, drm);
77 if (IS_ERR(udl))
78 return udl;
79
80 r = udl_init(udl);
81 if (r)
82 return ERR_PTR(r);
83
84 usb_set_intfdata(interface, udl);
85
86 return udl;
87 }
88
udl_usb_probe(struct usb_interface * interface,const struct usb_device_id * id)89 static int udl_usb_probe(struct usb_interface *interface,
90 const struct usb_device_id *id)
91 {
92 int r;
93 struct udl_device *udl;
94
95 udl = udl_driver_create(interface);
96 if (IS_ERR(udl))
97 return PTR_ERR(udl);
98
99 r = drm_dev_register(&udl->drm, 0);
100 if (r)
101 return r;
102
103 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
104
105 drm_client_setup(&udl->drm, NULL);
106
107 return 0;
108 }
109
udl_usb_disconnect(struct usb_interface * interface)110 static void udl_usb_disconnect(struct usb_interface *interface)
111 {
112 struct drm_device *dev = usb_get_intfdata(interface);
113 struct udl_device *udl = to_udl(dev);
114
115 drm_dev_unplug(dev);
116 udl_drop_usb(udl);
117 }
118
119 /*
120 * There are many DisplayLink-based graphics products, all with unique PIDs.
121 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
122 * We also require a match on SubClass (0x00) and Protocol (0x00),
123 * which is compatible with all known USB 2.0 era graphics chips and firmware,
124 * but allows DisplayLink to increment those for any future incompatible chips
125 */
126 static const struct usb_device_id id_table[] = {
127 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
128 .bInterfaceSubClass = 0x00,
129 .bInterfaceProtocol = 0x00,
130 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
131 USB_DEVICE_ID_MATCH_INT_CLASS |
132 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
133 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
134 {},
135 };
136 MODULE_DEVICE_TABLE(usb, id_table);
137
138 static struct usb_driver udl_driver = {
139 .name = "udl",
140 .probe = udl_usb_probe,
141 .disconnect = udl_usb_disconnect,
142 .suspend = udl_usb_suspend,
143 .resume = udl_usb_resume,
144 .reset_resume = udl_usb_reset_resume,
145 .id_table = id_table,
146 };
147 module_usb_driver(udl_driver);
148 MODULE_DESCRIPTION("KMS driver for the USB displaylink video adapters");
149 MODULE_LICENSE("GPL");
150