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