tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#include <drm/drmP.h>
2#include <drm/drm_usb.h>
3#include <linux/usb.h>
4#include <linux/module.h>
5
6int drm_get_usb_dev(struct usb_interface *interface,
7 const struct usb_device_id *id,
8 struct drm_driver *driver)
9{
10 struct drm_device *dev;
11 int ret;
12
13 DRM_DEBUG("\n");
14
15 dev = drm_dev_alloc(driver, &interface->dev);
16 if (!dev)
17 return -ENOMEM;
18
19 dev->usbdev = interface_to_usbdev(interface);
20 usb_set_intfdata(interface, dev);
21
22 ret = drm_dev_register(dev, 0);
23 if (ret)
24 goto err_free;
25
26 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
27 driver->name, driver->major, driver->minor, driver->patchlevel,
28 driver->date, dev->primary->index);
29
30 return 0;
31
32err_free:
33 drm_dev_free(dev);
34 return ret;
35
36}
37EXPORT_SYMBOL(drm_get_usb_dev);
38
39static int drm_usb_get_irq(struct drm_device *dev)
40{
41 return 0;
42}
43
44static const char *drm_usb_get_name(struct drm_device *dev)
45{
46 return "USB";
47}
48
49static int drm_usb_set_busid(struct drm_device *dev,
50 struct drm_master *master)
51{
52 return 0;
53}
54
55static struct drm_bus drm_usb_bus = {
56 .bus_type = DRIVER_BUS_USB,
57 .get_irq = drm_usb_get_irq,
58 .get_name = drm_usb_get_name,
59 .set_busid = drm_usb_set_busid,
60};
61
62int drm_usb_init(struct drm_driver *driver, struct usb_driver *udriver)
63{
64 int res;
65 DRM_DEBUG("\n");
66
67 driver->kdriver.usb = udriver;
68 driver->bus = &drm_usb_bus;
69
70 res = usb_register(udriver);
71 return res;
72}
73EXPORT_SYMBOL(drm_usb_init);
74
75void drm_usb_exit(struct drm_driver *driver,
76 struct usb_driver *udriver)
77{
78 usb_deregister(udriver);
79}
80EXPORT_SYMBOL(drm_usb_exit);
81
82MODULE_AUTHOR("David Airlie");
83MODULE_DESCRIPTION("USB DRM support");
84MODULE_LICENSE("GPL and additional rights");