root/drivers/gpu/drm/udl/udl_drv.c

DEFINITIONS

1. udl_usb_suspend
2. udl_usb_resume
3. udl_driver_release
4. udl_driver_create
5. udl_usb_probe
6. udl_usb_disconnect

   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 
  17 static 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 
  26 static 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 
  35 static 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 
  41 static 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 
  53 static 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 
  61 static 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 
  86 static 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 
 116 static 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 
 134 err_free:
 135         drm_dev_put(&udl->drm);
 136         return r;
 137 }
 138 
 139 static 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  */
 157 static 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 };
 167 MODULE_DEVICE_TABLE(usb, id_table);
 168 
 169 static 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 };
 177 module_usb_driver(udl_driver);
 178 MODULE_LICENSE("GPL");