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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/*
2 * Copyright (C) 2012 Red Hat
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License v2. See the file COPYING in the main directory of this archive for
6 * more details.
7 */
8
9#include <linux/module.h>
10#include "drm_usb.h"
11#include "drm_crtc_helper.h"
12#include "udl_drv.h"
13
14static struct drm_driver driver;
15
16/*
17 * There are many DisplayLink-based graphics products, all with unique PIDs.
18 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
19 * We also require a match on SubClass (0x00) and Protocol (0x00),
20 * which is compatible with all known USB 2.0 era graphics chips and firmware,
21 * but allows DisplayLink to increment those for any future incompatible chips
22 */
23static struct usb_device_id id_table[] = {
24 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
25 .bInterfaceSubClass = 0x00,
26 .bInterfaceProtocol = 0x00,
27 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
28 USB_DEVICE_ID_MATCH_INT_CLASS |
29 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
30 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
31 {},
32};
33MODULE_DEVICE_TABLE(usb, id_table);
34
35MODULE_LICENSE("GPL");
36
37static int udl_usb_probe(struct usb_interface *interface,
38 const struct usb_device_id *id)
39{
40 return drm_get_usb_dev(interface, id, &driver);
41}
42
43static void udl_usb_disconnect(struct usb_interface *interface)
44{
45 struct drm_device *dev = usb_get_intfdata(interface);
46
47 drm_kms_helper_poll_disable(dev);
48 drm_connector_unplug_all(dev);
49 udl_fbdev_unplug(dev);
50 udl_drop_usb(dev);
51 drm_unplug_dev(dev);
52}
53
54static const struct vm_operations_struct udl_gem_vm_ops = {
55 .fault = udl_gem_fault,
56 .open = drm_gem_vm_open,
57 .close = drm_gem_vm_close,
58};
59
60static const struct file_operations udl_driver_fops = {
61 .owner = THIS_MODULE,
62 .open = drm_open,
63 .mmap = udl_drm_gem_mmap,
64 .poll = drm_poll,
65 .read = drm_read,
66 .unlocked_ioctl = drm_ioctl,
67 .release = drm_release,
68 .fasync = drm_fasync,
69 .llseek = noop_llseek,
70};
71
72static struct drm_driver driver = {
73 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
74 .load = udl_driver_load,
75 .unload = udl_driver_unload,
76
77 /* gem hooks */
78 .gem_init_object = udl_gem_init_object,
79 .gem_free_object = udl_gem_free_object,
80 .gem_vm_ops = &udl_gem_vm_ops,
81
82 .dumb_create = udl_dumb_create,
83 .dumb_map_offset = udl_gem_mmap,
84 .dumb_destroy = udl_dumb_destroy,
85 .fops = &udl_driver_fops,
86
87 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
88 .gem_prime_import = udl_gem_prime_import,
89
90 .name = DRIVER_NAME,
91 .desc = DRIVER_DESC,
92 .date = DRIVER_DATE,
93 .major = DRIVER_MAJOR,
94 .minor = DRIVER_MINOR,
95 .patchlevel = DRIVER_PATCHLEVEL,
96};
97
98static struct usb_driver udl_driver = {
99 .name = "udl",
100 .probe = udl_usb_probe,
101 .disconnect = udl_usb_disconnect,
102 .id_table = id_table,
103};
104
105static int __init udl_init(void)
106{
107 return drm_usb_init(&driver, &udl_driver);
108}
109
110static void __exit udl_exit(void)
111{
112 drm_usb_exit(&driver, &udl_driver);
113}
114
115module_init(udl_init);
116module_exit(udl_exit);