| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2012 Red Hat |
| */ |
| |
| #include <linux/module.h> |
| |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_drv.h> |
| #include <drm/drm_fb_helper.h> |
| #include <drm/drm_file.h> |
| #include <drm/drm_gem_shmem_helper.h> |
| #include <drm/drm_managed.h> |
| #include <drm/drm_ioctl.h> |
| #include <drm/drm_probe_helper.h> |
| #include <drm/drm_print.h> |
| |
| #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); |
| |
| return drm_mode_config_helper_suspend(dev); |
| } |
| |
| static int udl_usb_resume(struct usb_interface *interface) |
| { |
| struct drm_device *dev = usb_get_intfdata(interface); |
| |
| return drm_mode_config_helper_resume(dev); |
| } |
| |
| 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, |
| |
| .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_fbdev_generic_setup(&udl->drm, 0); |
| |
| 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, |
| .id_table = id_table, |
| }; |
| module_usb_driver(udl_driver); |
| MODULE_LICENSE("GPL"); |