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