ebfdd6d5e8
Only importing an FD to a handle is currently supported on UDL, but the exporting functionality is equally useful. Signed-off-by: Haixia Shi <hshi@chromium.org> Reviewed-by: Stéphane Marchesin <marcheu@chromium.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
/*
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* Copyright (C) 2012 Red Hat
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License v2. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/module.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include "udl_drv.h"
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static int udl_driver_set_busid(struct drm_device *d, struct drm_master *m)
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{
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return 0;
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}
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static const struct vm_operations_struct udl_gem_vm_ops = {
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.fault = udl_gem_fault,
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.open = drm_gem_vm_open,
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.close = drm_gem_vm_close,
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};
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static const struct file_operations udl_driver_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.mmap = udl_drm_gem_mmap,
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.poll = drm_poll,
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.read = drm_read,
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.unlocked_ioctl = drm_ioctl,
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.release = drm_release,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = drm_compat_ioctl,
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#endif
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.llseek = noop_llseek,
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};
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static struct drm_driver driver = {
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.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
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.load = udl_driver_load,
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.unload = udl_driver_unload,
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.set_busid = udl_driver_set_busid,
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/* gem hooks */
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.gem_free_object = udl_gem_free_object,
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.gem_vm_ops = &udl_gem_vm_ops,
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.dumb_create = udl_dumb_create,
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.dumb_map_offset = udl_gem_mmap,
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.dumb_destroy = drm_gem_dumb_destroy,
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.fops = &udl_driver_fops,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_export = udl_gem_prime_export,
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.gem_prime_import = udl_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 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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struct usb_device *udev = interface_to_usbdev(interface);
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struct drm_device *dev;
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int r;
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dev = drm_dev_alloc(&driver, &interface->dev);
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if (!dev)
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return -ENOMEM;
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r = drm_dev_register(dev, (unsigned long)udev);
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if (r)
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goto err_free;
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usb_set_intfdata(interface, dev);
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DRM_INFO("Initialized udl on minor %d\n", dev->primary->index);
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return 0;
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err_free:
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drm_dev_unref(dev);
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return r;
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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_disable(dev);
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drm_connector_unplug_all(dev);
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udl_fbdev_unplug(dev);
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udl_drop_usb(dev);
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drm_unplug_dev(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 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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.id_table = id_table,
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};
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static int __init udl_init(void)
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{
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return usb_register(&udl_driver);
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}
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static void __exit udl_exit(void)
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{
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usb_deregister(&udl_driver);
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}
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module_init(udl_init);
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module_exit(udl_exit);
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MODULE_LICENSE("GPL");
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