summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/udl/udl_drv.c
blob: d1aa50fd6d65ab2fedcd7765b9f2928f4ec0f600 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012 Red Hat
 */

#include <linux/module.h>

#include <drm/drm_crtc_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_file.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_print.h>

#include "udl_drv.h"

static int udl_usb_suspend(struct usb_interface *interface,
			   pm_message_t message)
{
	struct drm_device *dev = usb_get_intfdata(interface);

	return drm_mode_config_helper_suspend(dev);
}

static int udl_usb_resume(struct usb_interface *interface)
{
	struct drm_device *dev = usb_get_intfdata(interface);

	return drm_mode_config_helper_resume(dev);
}

DEFINE_DRM_GEM_FOPS(udl_driver_fops);

static struct drm_driver driver = {
	.driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,

	/* gem hooks */
	.gem_create_object = udl_driver_gem_create_object,

	.fops = &udl_driver_fops,
	DRM_GEM_SHMEM_DRIVER_OPS,

	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	.patchlevel = DRIVER_PATCHLEVEL,
};

static struct udl_device *udl_driver_create(struct usb_interface *interface)
{
	struct usb_device *udev = interface_to_usbdev(interface);
	struct udl_device *udl;
	int r;

	udl = devm_drm_dev_alloc(&interface->dev, &driver,
				 struct udl_device, drm);
	if (IS_ERR(udl))
		return udl;

	udl->udev = udev;

	r = udl_init(udl);
	if (r)
		return ERR_PTR(r);

	usb_set_intfdata(interface, udl);

	return udl;
}

static int udl_usb_probe(struct usb_interface *interface,
			 const struct usb_device_id *id)
{
	int r;
	struct udl_device *udl;

	udl = udl_driver_create(interface);
	if (IS_ERR(udl))
		return PTR_ERR(udl);

	r = drm_dev_register(&udl->drm, 0);
	if (r)
		return r;

	DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);

	drm_fbdev_generic_setup(&udl->drm, 0);

	return 0;
}

static void udl_usb_disconnect(struct usb_interface *interface)
{
	struct drm_device *dev = usb_get_intfdata(interface);

	drm_kms_helper_poll_fini(dev);
	udl_drop_usb(dev);
	drm_dev_unplug(dev);
}

/*
 * There are many DisplayLink-based graphics products, all with unique PIDs.
 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
 * We also require a match on SubClass (0x00) and Protocol (0x00),
 * which is compatible with all known USB 2.0 era graphics chips and firmware,
 * but allows DisplayLink to increment those for any future incompatible chips
 */
static const struct usb_device_id id_table[] = {
	{.idVendor = 0x17e9, .bInterfaceClass = 0xff,
	 .bInterfaceSubClass = 0x00,
	 .bInterfaceProtocol = 0x00,
	 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
			USB_DEVICE_ID_MATCH_INT_CLASS |
			USB_DEVICE_ID_MATCH_INT_SUBCLASS |
			USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
	{},
};
MODULE_DEVICE_TABLE(usb, id_table);

static struct usb_driver udl_driver = {
	.name = "udl",
	.probe = udl_usb_probe,
	.disconnect = udl_usb_disconnect,
	.suspend = udl_usb_suspend,
	.resume = udl_usb_resume,
	.id_table = id_table,
};
module_usb_driver(udl_driver);
MODULE_LICENSE("GPL");