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