// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Red Hat */ #include #include #include #include #include #include #include #include #include #include #include #include "udl_drv.h" static int udl_usb_suspend(struct usb_interface *interface, pm_message_t message) { struct drm_device *dev = usb_get_intfdata(interface); int ret; ret = drm_mode_config_helper_suspend(dev); if (ret) return ret; udl_sync_pending_urbs(dev); return 0; } static int udl_usb_resume(struct usb_interface *interface) { struct drm_device *dev = usb_get_intfdata(interface); return drm_mode_config_helper_resume(dev); } static int udl_usb_reset_resume(struct usb_interface *interface) { struct drm_device *dev = usb_get_intfdata(interface); struct udl_device *udl = to_udl(dev); udl_select_std_channel(udl); return drm_mode_config_helper_resume(dev); } /* * FIXME: Dma-buf sharing requires DMA support by the importing device. * This function is a workaround to make USB devices work as well. * See todo.rst for how to fix the issue in the dma-buf framework. */ static struct drm_gem_object *udl_driver_gem_prime_import(struct drm_device *dev, struct dma_buf *dma_buf) { struct udl_device *udl = to_udl(dev); if (!udl->dmadev) return ERR_PTR(-ENODEV); return drm_gem_prime_import_dev(dev, dma_buf, udl->dmadev); } DEFINE_DRM_GEM_FOPS(udl_driver_fops); static const struct drm_driver driver = { .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET, /* GEM hooks */ .fops = &udl_driver_fops, DRM_GEM_SHMEM_DRIVER_OPS, .gem_prime_import = udl_driver_gem_prime_import, DRM_FBDEV_SHMEM_DRIVER_OPS, .name = DRIVER_NAME, .desc = DRIVER_DESC, .date = DRIVER_DATE, .major = DRIVER_MAJOR, .minor = DRIVER_MINOR, .patchlevel = DRIVER_PATCHLEVEL, }; static struct udl_device *udl_driver_create(struct usb_interface *interface) { struct udl_device *udl; int r; udl = devm_drm_dev_alloc(&interface->dev, &driver, struct udl_device, drm); if (IS_ERR(udl)) return udl; r = udl_init(udl); if (r) return ERR_PTR(r); usb_set_intfdata(interface, udl); return udl; } static int udl_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { int r; struct udl_device *udl; udl = udl_driver_create(interface); if (IS_ERR(udl)) return PTR_ERR(udl); r = drm_dev_register(&udl->drm, 0); if (r) return r; DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index); drm_client_setup(&udl->drm, NULL); return 0; } static void udl_usb_disconnect(struct usb_interface *interface) { struct drm_device *dev = usb_get_intfdata(interface); drm_kms_helper_poll_fini(dev); udl_drop_usb(dev); drm_dev_unplug(dev); } /* * There are many DisplayLink-based graphics products, all with unique PIDs. * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff) * We also require a match on SubClass (0x00) and Protocol (0x00), * which is compatible with all known USB 2.0 era graphics chips and firmware, * but allows DisplayLink to increment those for any future incompatible chips */ static const struct usb_device_id id_table[] = { {.idVendor = 0x17e9, .bInterfaceClass = 0xff, .bInterfaceSubClass = 0x00, .bInterfaceProtocol = 0x00, .match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS | USB_DEVICE_ID_MATCH_INT_PROTOCOL,}, {}, }; MODULE_DEVICE_TABLE(usb, id_table); static struct usb_driver udl_driver = { .name = "udl", .probe = udl_usb_probe, .disconnect = udl_usb_disconnect, .suspend = udl_usb_suspend, .resume = udl_usb_resume, .reset_resume = udl_usb_reset_resume, .id_table = id_table, }; module_usb_driver(udl_driver); MODULE_DESCRIPTION("KMS driver for the USB displaylink video adapters"); MODULE_LICENSE("GPL");