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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_file.h>
11#include <drm/drm_ioctl.h>
12#include <drm/drm_probe_helper.h>
13#include <drm/drm_print.h>
14
15#include "udl_drv.h"
16
17static int udl_usb_suspend(struct usb_interface *interface,
18 pm_message_t message)
19{
20 struct drm_device *dev = usb_get_intfdata(interface);
21
22 drm_kms_helper_poll_disable(dev);
23 return 0;
24}
25
26static int udl_usb_resume(struct usb_interface *interface)
27{
28 struct drm_device *dev = usb_get_intfdata(interface);
29
30 drm_kms_helper_poll_enable(dev);
31 udl_modeset_restore(dev);
32 return 0;
33}
34
35static const struct vm_operations_struct udl_gem_vm_ops = {
36 .fault = udl_gem_fault,
37 .open = drm_gem_vm_open,
38 .close = drm_gem_vm_close,
39};
40
41static const struct file_operations udl_driver_fops = {
42 .owner = THIS_MODULE,
43 .open = drm_open,
44 .mmap = udl_drm_gem_mmap,
45 .poll = drm_poll,
46 .read = drm_read,
47 .unlocked_ioctl = drm_ioctl,
48 .release = drm_release,
49 .compat_ioctl = drm_compat_ioctl,
50 .llseek = noop_llseek,
51};
52
53static void udl_driver_release(struct drm_device *dev)
54{
55 udl_fini(dev);
56 udl_modeset_cleanup(dev);
57 drm_dev_fini(dev);
58 kfree(dev);
59}
60
61static struct drm_driver driver = {
62 .driver_features = DRIVER_MODESET | DRIVER_GEM,
63 .release = udl_driver_release,
64
65 /* gem hooks */
66 .gem_free_object_unlocked = udl_gem_free_object,
67 .gem_vm_ops = &udl_gem_vm_ops,
68
69 .dumb_create = udl_dumb_create,
70 .dumb_map_offset = udl_gem_mmap,
71 .fops = &udl_driver_fops,
72
73 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
74 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
75 .gem_prime_export = udl_gem_prime_export,
76 .gem_prime_import = udl_gem_prime_import,
77
78 .name = DRIVER_NAME,
79 .desc = DRIVER_DESC,
80 .date = DRIVER_DATE,
81 .major = DRIVER_MAJOR,
82 .minor = DRIVER_MINOR,
83 .patchlevel = DRIVER_PATCHLEVEL,
84};
85
86static struct udl_device *udl_driver_create(struct usb_interface *interface)
87{
88 struct usb_device *udev = interface_to_usbdev(interface);
89 struct udl_device *udl;
90 int r;
91
92 udl = kzalloc(sizeof(*udl), GFP_KERNEL);
93 if (!udl)
94 return ERR_PTR(-ENOMEM);
95
96 r = drm_dev_init(&udl->drm, &driver, &interface->dev);
97 if (r) {
98 kfree(udl);
99 return ERR_PTR(r);
100 }
101
102 udl->udev = udev;
103 udl->drm.dev_private = udl;
104
105 r = udl_init(udl);
106 if (r) {
107 drm_dev_fini(&udl->drm);
108 kfree(udl);
109 return ERR_PTR(r);
110 }
111
112 usb_set_intfdata(interface, udl);
113 return udl;
114}
115
116static int udl_usb_probe(struct usb_interface *interface,
117 const struct usb_device_id *id)
118{
119 int r;
120 struct udl_device *udl;
121
122 udl = udl_driver_create(interface);
123 if (IS_ERR(udl))
124 return PTR_ERR(udl);
125
126 r = drm_dev_register(&udl->drm, 0);
127 if (r)
128 goto err_free;
129
130 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
131
132 return 0;
133
134err_free:
135 drm_dev_put(&udl->drm);
136 return r;
137}
138
139static void udl_usb_disconnect(struct usb_interface *interface)
140{
141 struct drm_device *dev = usb_get_intfdata(interface);
142
143 drm_kms_helper_poll_disable(dev);
144 udl_fbdev_unplug(dev);
145 udl_drop_usb(dev);
146 drm_dev_unplug(dev);
147 drm_dev_put(dev);
148}
149
150/*
151 * There are many DisplayLink-based graphics products, all with unique PIDs.
152 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
153 * We also require a match on SubClass (0x00) and Protocol (0x00),
154 * which is compatible with all known USB 2.0 era graphics chips and firmware,
155 * but allows DisplayLink to increment those for any future incompatible chips
156 */
157static const struct usb_device_id id_table[] = {
158 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
159 .bInterfaceSubClass = 0x00,
160 .bInterfaceProtocol = 0x00,
161 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
162 USB_DEVICE_ID_MATCH_INT_CLASS |
163 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
164 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
165 {},
166};
167MODULE_DEVICE_TABLE(usb, id_table);
168
169static struct usb_driver udl_driver = {
170 .name = "udl",
171 .probe = udl_usb_probe,
172 .disconnect = udl_usb_disconnect,
173 .suspend = udl_usb_suspend,
174 .resume = udl_usb_resume,
175 .id_table = id_table,
176};
177module_usb_driver(udl_driver);
178MODULE_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_drv.h>
9#include <drm/drm_fbdev_generic.h>
10#include <drm/drm_file.h>
11#include <drm/drm_gem_shmem_helper.h>
12#include <drm/drm_managed.h>
13#include <drm/drm_modeset_helper.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");