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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/drm_crtc_helper.h>
9#include <drm/drm_drv.h>
10#include <drm/drm_fb_helper.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_ioctl.h>
15#include <drm/drm_probe_helper.h>
16#include <drm/drm_print.h>
17
18#include "udl_drv.h"
19
20static int udl_usb_suspend(struct usb_interface *interface,
21 pm_message_t message)
22{
23 struct drm_device *dev = usb_get_intfdata(interface);
24
25 return drm_mode_config_helper_suspend(dev);
26}
27
28static int udl_usb_resume(struct usb_interface *interface)
29{
30 struct drm_device *dev = usb_get_intfdata(interface);
31
32 return drm_mode_config_helper_resume(dev);
33}
34
35DEFINE_DRM_GEM_FOPS(udl_driver_fops);
36
37static struct drm_driver driver = {
38 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
39
40 /* GEM hooks */
41 .gem_create_object = drm_gem_shmem_create_object_cached,
42
43 .fops = &udl_driver_fops,
44 DRM_GEM_SHMEM_DRIVER_OPS,
45
46 .name = DRIVER_NAME,
47 .desc = DRIVER_DESC,
48 .date = DRIVER_DATE,
49 .major = DRIVER_MAJOR,
50 .minor = DRIVER_MINOR,
51 .patchlevel = DRIVER_PATCHLEVEL,
52};
53
54static struct udl_device *udl_driver_create(struct usb_interface *interface)
55{
56 struct usb_device *udev = interface_to_usbdev(interface);
57 struct udl_device *udl;
58 int r;
59
60 udl = devm_drm_dev_alloc(&interface->dev, &driver,
61 struct udl_device, drm);
62 if (IS_ERR(udl))
63 return udl;
64
65 udl->udev = udev;
66
67 r = udl_init(udl);
68 if (r)
69 return ERR_PTR(r);
70
71 usb_set_intfdata(interface, udl);
72
73 return udl;
74}
75
76static int udl_usb_probe(struct usb_interface *interface,
77 const struct usb_device_id *id)
78{
79 int r;
80 struct udl_device *udl;
81
82 udl = udl_driver_create(interface);
83 if (IS_ERR(udl))
84 return PTR_ERR(udl);
85
86 r = drm_dev_register(&udl->drm, 0);
87 if (r)
88 return r;
89
90 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
91
92 drm_fbdev_generic_setup(&udl->drm, 0);
93
94 return 0;
95}
96
97static void udl_usb_disconnect(struct usb_interface *interface)
98{
99 struct drm_device *dev = usb_get_intfdata(interface);
100
101 drm_kms_helper_poll_fini(dev);
102 udl_drop_usb(dev);
103 drm_dev_unplug(dev);
104}
105
106/*
107 * There are many DisplayLink-based graphics products, all with unique PIDs.
108 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
109 * We also require a match on SubClass (0x00) and Protocol (0x00),
110 * which is compatible with all known USB 2.0 era graphics chips and firmware,
111 * but allows DisplayLink to increment those for any future incompatible chips
112 */
113static const struct usb_device_id id_table[] = {
114 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
115 .bInterfaceSubClass = 0x00,
116 .bInterfaceProtocol = 0x00,
117 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
118 USB_DEVICE_ID_MATCH_INT_CLASS |
119 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
120 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
121 {},
122};
123MODULE_DEVICE_TABLE(usb, id_table);
124
125static struct usb_driver udl_driver = {
126 .name = "udl",
127 .probe = udl_usb_probe,
128 .disconnect = udl_usb_disconnect,
129 .suspend = udl_usb_suspend,
130 .resume = udl_usb_resume,
131 .id_table = id_table,
132};
133module_usb_driver(udl_driver);
134MODULE_LICENSE("GPL");
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/drm_crtc_helper.h>
9#include <drm/drm_drv.h>
10#include <drm/drm_fbdev_generic.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_ioctl.h>
15#include <drm/drm_probe_helper.h>
16#include <drm/drm_print.h>
17
18#include "udl_drv.h"
19
20static int udl_usb_suspend(struct usb_interface *interface,
21 pm_message_t message)
22{
23 struct drm_device *dev = usb_get_intfdata(interface);
24 int ret;
25
26 ret = drm_mode_config_helper_suspend(dev);
27 if (ret)
28 return ret;
29
30 udl_sync_pending_urbs(dev);
31 return 0;
32}
33
34static int udl_usb_resume(struct usb_interface *interface)
35{
36 struct drm_device *dev = usb_get_intfdata(interface);
37
38 return drm_mode_config_helper_resume(dev);
39}
40
41static int udl_usb_reset_resume(struct usb_interface *interface)
42{
43 struct drm_device *dev = usb_get_intfdata(interface);
44 struct udl_device *udl = to_udl(dev);
45
46 udl_select_std_channel(udl);
47
48 return drm_mode_config_helper_resume(dev);
49}
50
51/*
52 * FIXME: Dma-buf sharing requires DMA support by the importing device.
53 * This function is a workaround to make USB devices work as well.
54 * See todo.rst for how to fix the issue in the dma-buf framework.
55 */
56static struct drm_gem_object *udl_driver_gem_prime_import(struct drm_device *dev,
57 struct dma_buf *dma_buf)
58{
59 struct udl_device *udl = to_udl(dev);
60
61 if (!udl->dmadev)
62 return ERR_PTR(-ENODEV);
63
64 return drm_gem_prime_import_dev(dev, dma_buf, udl->dmadev);
65}
66
67DEFINE_DRM_GEM_FOPS(udl_driver_fops);
68
69static const struct drm_driver driver = {
70 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
71
72 /* GEM hooks */
73 .fops = &udl_driver_fops,
74 DRM_GEM_SHMEM_DRIVER_OPS,
75 .gem_prime_import = udl_driver_gem_prime_import,
76
77 .name = DRIVER_NAME,
78 .desc = DRIVER_DESC,
79 .date = DRIVER_DATE,
80 .major = DRIVER_MAJOR,
81 .minor = DRIVER_MINOR,
82 .patchlevel = DRIVER_PATCHLEVEL,
83};
84
85static struct udl_device *udl_driver_create(struct usb_interface *interface)
86{
87 struct udl_device *udl;
88 int r;
89
90 udl = devm_drm_dev_alloc(&interface->dev, &driver,
91 struct udl_device, drm);
92 if (IS_ERR(udl))
93 return udl;
94
95 r = udl_init(udl);
96 if (r)
97 return ERR_PTR(r);
98
99 usb_set_intfdata(interface, udl);
100
101 return udl;
102}
103
104static int udl_usb_probe(struct usb_interface *interface,
105 const struct usb_device_id *id)
106{
107 int r;
108 struct udl_device *udl;
109
110 udl = udl_driver_create(interface);
111 if (IS_ERR(udl))
112 return PTR_ERR(udl);
113
114 r = drm_dev_register(&udl->drm, 0);
115 if (r)
116 return r;
117
118 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
119
120 drm_fbdev_generic_setup(&udl->drm, 0);
121
122 return 0;
123}
124
125static void udl_usb_disconnect(struct usb_interface *interface)
126{
127 struct drm_device *dev = usb_get_intfdata(interface);
128
129 drm_kms_helper_poll_fini(dev);
130 udl_drop_usb(dev);
131 drm_dev_unplug(dev);
132}
133
134/*
135 * There are many DisplayLink-based graphics products, all with unique PIDs.
136 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
137 * We also require a match on SubClass (0x00) and Protocol (0x00),
138 * which is compatible with all known USB 2.0 era graphics chips and firmware,
139 * but allows DisplayLink to increment those for any future incompatible chips
140 */
141static const struct usb_device_id id_table[] = {
142 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
143 .bInterfaceSubClass = 0x00,
144 .bInterfaceProtocol = 0x00,
145 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
146 USB_DEVICE_ID_MATCH_INT_CLASS |
147 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
148 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
149 {},
150};
151MODULE_DEVICE_TABLE(usb, id_table);
152
153static struct usb_driver udl_driver = {
154 .name = "udl",
155 .probe = udl_usb_probe,
156 .disconnect = udl_usb_disconnect,
157 .suspend = udl_usb_suspend,
158 .resume = udl_usb_resume,
159 .reset_resume = udl_usb_reset_resume,
160 .id_table = id_table,
161};
162module_usb_driver(udl_driver);
163MODULE_LICENSE("GPL");