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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_drv.h>
9#include <drm/drm_client_setup.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
21static int udl_usb_suspend(struct usb_interface *interface,
22 pm_message_t message)
23{
24 struct drm_device *dev = usb_get_intfdata(interface);
25 int ret;
26
27 ret = drm_mode_config_helper_suspend(dev);
28 if (ret)
29 return ret;
30
31 udl_sync_pending_urbs(dev);
32 return 0;
33}
34
35static int udl_usb_resume(struct usb_interface *interface)
36{
37 struct drm_device *dev = usb_get_intfdata(interface);
38
39 return drm_mode_config_helper_resume(dev);
40}
41
42static int udl_usb_reset_resume(struct usb_interface *interface)
43{
44 struct drm_device *dev = usb_get_intfdata(interface);
45 struct udl_device *udl = to_udl(dev);
46
47 udl_select_std_channel(udl);
48
49 return drm_mode_config_helper_resume(dev);
50}
51
52/*
53 * FIXME: Dma-buf sharing requires DMA support by the importing device.
54 * This function is a workaround to make USB devices work as well.
55 * See todo.rst for how to fix the issue in the dma-buf framework.
56 */
57static struct drm_gem_object *udl_driver_gem_prime_import(struct drm_device *dev,
58 struct dma_buf *dma_buf)
59{
60 struct udl_device *udl = to_udl(dev);
61
62 if (!udl->dmadev)
63 return ERR_PTR(-ENODEV);
64
65 return drm_gem_prime_import_dev(dev, dma_buf, udl->dmadev);
66}
67
68DEFINE_DRM_GEM_FOPS(udl_driver_fops);
69
70static const struct drm_driver driver = {
71 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
72
73 /* GEM hooks */
74 .fops = &udl_driver_fops,
75 DRM_GEM_SHMEM_DRIVER_OPS,
76 .gem_prime_import = udl_driver_gem_prime_import,
77 DRM_FBDEV_SHMEM_DRIVER_OPS,
78
79 .name = DRIVER_NAME,
80 .desc = DRIVER_DESC,
81 .date = DRIVER_DATE,
82 .major = DRIVER_MAJOR,
83 .minor = DRIVER_MINOR,
84 .patchlevel = DRIVER_PATCHLEVEL,
85};
86
87static struct udl_device *udl_driver_create(struct usb_interface *interface)
88{
89 struct udl_device *udl;
90 int r;
91
92 udl = devm_drm_dev_alloc(&interface->dev, &driver,
93 struct udl_device, drm);
94 if (IS_ERR(udl))
95 return udl;
96
97 r = udl_init(udl);
98 if (r)
99 return ERR_PTR(r);
100
101 usb_set_intfdata(interface, udl);
102
103 return udl;
104}
105
106static int udl_usb_probe(struct usb_interface *interface,
107 const struct usb_device_id *id)
108{
109 int r;
110 struct udl_device *udl;
111
112 udl = udl_driver_create(interface);
113 if (IS_ERR(udl))
114 return PTR_ERR(udl);
115
116 r = drm_dev_register(&udl->drm, 0);
117 if (r)
118 return r;
119
120 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
121
122 drm_client_setup(&udl->drm, NULL);
123
124 return 0;
125}
126
127static void udl_usb_disconnect(struct usb_interface *interface)
128{
129 struct drm_device *dev = usb_get_intfdata(interface);
130
131 drm_kms_helper_poll_fini(dev);
132 udl_drop_usb(dev);
133 drm_dev_unplug(dev);
134}
135
136/*
137 * There are many DisplayLink-based graphics products, all with unique PIDs.
138 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
139 * We also require a match on SubClass (0x00) and Protocol (0x00),
140 * which is compatible with all known USB 2.0 era graphics chips and firmware,
141 * but allows DisplayLink to increment those for any future incompatible chips
142 */
143static const struct usb_device_id id_table[] = {
144 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
145 .bInterfaceSubClass = 0x00,
146 .bInterfaceProtocol = 0x00,
147 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
148 USB_DEVICE_ID_MATCH_INT_CLASS |
149 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
150 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
151 {},
152};
153MODULE_DEVICE_TABLE(usb, id_table);
154
155static struct usb_driver udl_driver = {
156 .name = "udl",
157 .probe = udl_usb_probe,
158 .disconnect = udl_usb_disconnect,
159 .suspend = udl_usb_suspend,
160 .resume = udl_usb_resume,
161 .reset_resume = udl_usb_reset_resume,
162 .id_table = id_table,
163};
164module_usb_driver(udl_driver);
165MODULE_DESCRIPTION("KMS driver for the USB displaylink video adapters");
166MODULE_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_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
35/*
36 * FIXME: Dma-buf sharing requires DMA support by the importing device.
37 * This function is a workaround to make USB devices work as well.
38 * See todo.rst for how to fix the issue in the dma-buf framework.
39 */
40static struct drm_gem_object *udl_driver_gem_prime_import(struct drm_device *dev,
41 struct dma_buf *dma_buf)
42{
43 struct udl_device *udl = to_udl(dev);
44
45 if (!udl->dmadev)
46 return ERR_PTR(-ENODEV);
47
48 return drm_gem_prime_import_dev(dev, dma_buf, udl->dmadev);
49}
50
51DEFINE_DRM_GEM_FOPS(udl_driver_fops);
52
53static const struct drm_driver driver = {
54 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
55
56 /* GEM hooks */
57 .fops = &udl_driver_fops,
58 DRM_GEM_SHMEM_DRIVER_OPS,
59 .gem_prime_import = udl_driver_gem_prime_import,
60
61 .name = DRIVER_NAME,
62 .desc = DRIVER_DESC,
63 .date = DRIVER_DATE,
64 .major = DRIVER_MAJOR,
65 .minor = DRIVER_MINOR,
66 .patchlevel = DRIVER_PATCHLEVEL,
67};
68
69static struct udl_device *udl_driver_create(struct usb_interface *interface)
70{
71 struct udl_device *udl;
72 int r;
73
74 udl = devm_drm_dev_alloc(&interface->dev, &driver,
75 struct udl_device, drm);
76 if (IS_ERR(udl))
77 return udl;
78
79 r = udl_init(udl);
80 if (r)
81 return ERR_PTR(r);
82
83 usb_set_intfdata(interface, udl);
84
85 return udl;
86}
87
88static int udl_usb_probe(struct usb_interface *interface,
89 const struct usb_device_id *id)
90{
91 int r;
92 struct udl_device *udl;
93
94 udl = udl_driver_create(interface);
95 if (IS_ERR(udl))
96 return PTR_ERR(udl);
97
98 r = drm_dev_register(&udl->drm, 0);
99 if (r)
100 return r;
101
102 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
103
104 drm_fbdev_generic_setup(&udl->drm, 0);
105
106 return 0;
107}
108
109static void udl_usb_disconnect(struct usb_interface *interface)
110{
111 struct drm_device *dev = usb_get_intfdata(interface);
112
113 drm_kms_helper_poll_fini(dev);
114 udl_drop_usb(dev);
115 drm_dev_unplug(dev);
116}
117
118/*
119 * There are many DisplayLink-based graphics products, all with unique PIDs.
120 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
121 * We also require a match on SubClass (0x00) and Protocol (0x00),
122 * which is compatible with all known USB 2.0 era graphics chips and firmware,
123 * but allows DisplayLink to increment those for any future incompatible chips
124 */
125static const struct usb_device_id id_table[] = {
126 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
127 .bInterfaceSubClass = 0x00,
128 .bInterfaceProtocol = 0x00,
129 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
130 USB_DEVICE_ID_MATCH_INT_CLASS |
131 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
132 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
133 {},
134};
135MODULE_DEVICE_TABLE(usb, id_table);
136
137static struct usb_driver udl_driver = {
138 .name = "udl",
139 .probe = udl_usb_probe,
140 .disconnect = udl_usb_disconnect,
141 .suspend = udl_usb_suspend,
142 .resume = udl_usb_resume,
143 .id_table = id_table,
144};
145module_usb_driver(udl_driver);
146MODULE_LICENSE("GPL");