Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / udl / udl_drv.c

diff --git a/kernel/drivers/gpu/drm/udl/udl_drv.c b/kernel/drivers/gpu/drm/udl/udl_drv.c
new file mode 100644 (file)
index 0000000..d5728ec
--- /dev/null
+++ b/kernel/drivers/gpu/drm/udl/udl_drv.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2012 Red Hat
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License v2. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include "udl_drv.h"
+
+static int udl_driver_set_busid(struct drm_device *d, struct drm_master *m)
+{
+       return 0;
+}
+
+static const struct vm_operations_struct udl_gem_vm_ops = {
+       .fault = udl_gem_fault,
+       .open = drm_gem_vm_open,
+       .close = drm_gem_vm_close,
+};
+
+static const struct file_operations udl_driver_fops = {
+       .owner = THIS_MODULE,
+       .open = drm_open,
+       .mmap = udl_drm_gem_mmap,
+       .poll = drm_poll,
+       .read = drm_read,
+       .unlocked_ioctl = drm_ioctl,
+       .release = drm_release,
+#ifdef CONFIG_COMPAT
+       .compat_ioctl = drm_compat_ioctl,
+#endif
+       .llseek = noop_llseek,
+};
+
+static struct drm_driver driver = {
+       .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
+       .load = udl_driver_load,
+       .unload = udl_driver_unload,
+       .set_busid = udl_driver_set_busid,
+
+       /* gem hooks */
+       .gem_free_object = udl_gem_free_object,
+       .gem_vm_ops = &udl_gem_vm_ops,
+
+       .dumb_create = udl_dumb_create,
+       .dumb_map_offset = udl_gem_mmap,
+       .dumb_destroy = drm_gem_dumb_destroy,
+       .fops = &udl_driver_fops,
+
+       .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+       .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+       .gem_prime_export = udl_gem_prime_export,
+       .gem_prime_import = udl_gem_prime_import,
+
+       .name = DRIVER_NAME,
+       .desc = DRIVER_DESC,
+       .date = DRIVER_DATE,
+       .major = DRIVER_MAJOR,
+       .minor = DRIVER_MINOR,
+       .patchlevel = DRIVER_PATCHLEVEL,
+};
+
+static int udl_usb_probe(struct usb_interface *interface,
+                        const struct usb_device_id *id)
+{
+       struct usb_device *udev = interface_to_usbdev(interface);
+       struct drm_device *dev;
+       int r;
+
+       dev = drm_dev_alloc(&driver, &interface->dev);
+       if (!dev)
+               return -ENOMEM;
+
+       r = drm_dev_register(dev, (unsigned long)udev);
+       if (r)
+               goto err_free;
+
+       usb_set_intfdata(interface, dev);
+       DRM_INFO("Initialized udl on minor %d\n", dev->primary->index);
+
+       return 0;
+
+err_free:
+       drm_dev_unref(dev);
+       return r;
+}
+
+static void udl_usb_disconnect(struct usb_interface *interface)
+{
+       struct drm_device *dev = usb_get_intfdata(interface);
+
+       drm_kms_helper_poll_disable(dev);
+       drm_connector_unplug_all(dev);
+       udl_fbdev_unplug(dev);
+       udl_drop_usb(dev);
+       drm_unplug_dev(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 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,
+       .id_table = id_table,
+};
+
+static int __init udl_init(void)
+{
+       return usb_register(&udl_driver);
+}
+
+static void __exit udl_exit(void)
+{
+       usb_deregister(&udl_driver);
+}
+
+module_init(udl_init);
+module_exit(udl_exit);
+MODULE_LICENSE("GPL");