drivers/gpu/drm/udl/udl_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2012 Red Hat
   4  */
   5
   6 #include <linux/module.h>
   7 #include <drm/drmP.h>
   8 #include <drm/drm_crtc_helper.h>
   9 #include <drm/drm_probe_helper.h>
  10 #include "udl_drv.h"
  11
  12 static int udl_usb_suspend(struct usb_interface *interface,
  13                            pm_message_t message)
  14 {
  15         struct drm_device *dev = usb_get_intfdata(interface);
  16
  17         drm_kms_helper_poll_disable(dev);
  18         return 0;
  19 }
  20
  21 static int udl_usb_resume(struct usb_interface *interface)
  22 {
  23         struct drm_device *dev = usb_get_intfdata(interface);
  24
  25         drm_kms_helper_poll_enable(dev);
  26         udl_modeset_restore(dev);
  27         return 0;
  28 }
  29
  30 static const struct vm_operations_struct udl_gem_vm_ops = {
  31         .fault = udl_gem_fault,
  32         .open = drm_gem_vm_open,
  33         .close = drm_gem_vm_close,
  34 };
  35
  36 static const struct file_operations udl_driver_fops = {
  37         .owner = THIS_MODULE,
  38         .open = drm_open,
  39         .mmap = udl_drm_gem_mmap,
  40         .poll = drm_poll,
  41         .read = drm_read,
  42         .unlocked_ioctl = drm_ioctl,
  43         .release = drm_release,
  44         .compat_ioctl = drm_compat_ioctl,
  45         .llseek = noop_llseek,
  46 };
  47
  48 static void udl_driver_release(struct drm_device *dev)
  49 {
  50         udl_fini(dev);
  51         udl_modeset_cleanup(dev);
  52         drm_dev_fini(dev);
  53         kfree(dev);
  54 }
  55
  56 static struct drm_driver driver = {
  57         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
  58         .release = udl_driver_release,
  59
  60         /* gem hooks */
  61         .gem_free_object_unlocked = udl_gem_free_object,
  62         .gem_vm_ops = &udl_gem_vm_ops,
  63
  64         .dumb_create = udl_dumb_create,
  65         .dumb_map_offset = udl_gem_mmap,
  66         .fops = &udl_driver_fops,
  67
  68         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  69         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  70         .gem_prime_export = udl_gem_prime_export,
  71         .gem_prime_import = udl_gem_prime_import,
  72
  73         .name = DRIVER_NAME,
  74         .desc = DRIVER_DESC,
  75         .date = DRIVER_DATE,
  76         .major = DRIVER_MAJOR,
  77         .minor = DRIVER_MINOR,
  78         .patchlevel = DRIVER_PATCHLEVEL,
  79 };
  80
  81 static struct udl_device *udl_driver_create(struct usb_interface *interface)
  82 {
  83         struct usb_device *udev = interface_to_usbdev(interface);
  84         struct udl_device *udl;
  85         int r;
  86
  87         udl = kzalloc(sizeof(*udl), GFP_KERNEL);
  88         if (!udl)
  89                 return ERR_PTR(-ENOMEM);
  90
  91         r = drm_dev_init(&udl->drm, &driver, &interface->dev);
  92         if (r) {
  93                 kfree(udl);
  94                 return ERR_PTR(r);
  95         }
  96
  97         udl->udev = udev;
  98         udl->drm.dev_private = udl;
  99
 100         r = udl_init(udl);
 101         if (r) {
 102                 drm_dev_fini(&udl->drm);
 103                 kfree(udl);
 104                 return ERR_PTR(r);
 105         }
 106
 107         usb_set_intfdata(interface, udl);
 108         return udl;
 109 }
 110
 111 static int udl_usb_probe(struct usb_interface *interface,
 112                          const struct usb_device_id *id)
 113 {
 114         int r;
 115         struct udl_device *udl;
 116
 117         udl = udl_driver_create(interface);
 118         if (IS_ERR(udl))
 119                 return PTR_ERR(udl);
 120
 121         r = drm_dev_register(&udl->drm, 0);
 122         if (r)
 123                 goto err_free;
 124
 125         DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
 126
 127         return 0;
 128
 129 err_free:
 130         drm_dev_put(&udl->drm);
 131         return r;
 132 }
 133
 134 static void udl_usb_disconnect(struct usb_interface *interface)
 135 {
 136         struct drm_device *dev = usb_get_intfdata(interface);
 137
 138         drm_kms_helper_poll_disable(dev);
 139         udl_fbdev_unplug(dev);
 140         udl_drop_usb(dev);
 141         drm_dev_unplug(dev);
 142         drm_dev_put(dev);
 143 }
 144
 145 /*
 146  * There are many DisplayLink-based graphics products, all with unique PIDs.
 147  * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
 148  * We also require a match on SubClass (0x00) and Protocol (0x00),
 149  * which is compatible with all known USB 2.0 era graphics chips and firmware,
 150  * but allows DisplayLink to increment those for any future incompatible chips
 151  */
 152 static const struct usb_device_id id_table[] = {
 153         {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
 154          .bInterfaceSubClass = 0x00,
 155          .bInterfaceProtocol = 0x00,
 156          .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
 157                         USB_DEVICE_ID_MATCH_INT_CLASS |
 158                         USB_DEVICE_ID_MATCH_INT_SUBCLASS |
 159                         USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
 160         {},
 161 };
 162 MODULE_DEVICE_TABLE(usb, id_table);
 163
 164 static struct usb_driver udl_driver = {
 165         .name = "udl",
 166         .probe = udl_usb_probe,
 167         .disconnect = udl_usb_disconnect,
 168         .suspend = udl_usb_suspend,
 169         .resume = udl_usb_resume,
 170         .id_table = id_table,
 171 };
 172 module_usb_driver(udl_driver);
 173 MODULE_LICENSE("GPL");