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