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