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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/gpu/drm/drm_usb.c
15111 views
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#include "drmP.h"

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#include <linux/usb.h>

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#ifdef CONFIG_USB

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int drm_get_usb_dev(struct usb_interface *interface,

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		    const struct usb_device_id *id,

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		    struct drm_driver *driver)

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{

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	struct drm_device *dev;

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	struct usb_device *usbdev;

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	int ret;

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	DRM_DEBUG("\n");

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	dev = kzalloc(sizeof(*dev), GFP_KERNEL);

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	if (!dev)

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		return -ENOMEM;

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	usbdev = interface_to_usbdev(interface);

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	dev->usbdev = usbdev;

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	dev->dev = &usbdev->dev;

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	mutex_lock(&drm_global_mutex);

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	ret = drm_fill_in_dev(dev, NULL, driver);

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	if (ret) {

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		printk(KERN_ERR "DRM: Fill_in_dev failed.\n");

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		goto err_g1;

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	}

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	usb_set_intfdata(interface, dev);

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	ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);

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	if (ret)

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		goto err_g1;

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	ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);

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	if (ret)

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		goto err_g2;

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	if (dev->driver->load) {

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		ret = dev->driver->load(dev, 0);

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		if (ret)

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			goto err_g3;

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	}

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	/* setup the grouping for the legacy output */

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	ret = drm_mode_group_init_legacy_group(dev,

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					       &dev->primary->mode_group);

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	if (ret)

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		goto err_g3;

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	list_add_tail(&dev->driver_item, &driver->device_list);

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	mutex_unlock(&drm_global_mutex);

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	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",

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		 driver->name, driver->major, driver->minor, driver->patchlevel,

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		 driver->date, dev->primary->index);

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	return 0;

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err_g3:

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	drm_put_minor(&dev->primary);

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err_g2:

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	drm_put_minor(&dev->control);

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err_g1:

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	kfree(dev);

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	mutex_unlock(&drm_global_mutex);

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	return ret;

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}

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EXPORT_SYMBOL(drm_get_usb_dev);

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static int drm_usb_get_irq(struct drm_device *dev)

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{

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	return 0;

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}

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static const char *drm_usb_get_name(struct drm_device *dev)

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{

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	return "USB";

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}

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static int drm_usb_set_busid(struct drm_device *dev,

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			       struct drm_master *master)

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{

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	return 0;

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}

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static struct drm_bus drm_usb_bus = {

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	.bus_type = DRIVER_BUS_USB,

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	.get_irq = drm_usb_get_irq,

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	.get_name = drm_usb_get_name,

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	.set_busid = drm_usb_set_busid,

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};

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int drm_usb_init(struct drm_driver *driver, struct usb_driver *udriver)

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{

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	int res;

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	DRM_DEBUG("\n");

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	INIT_LIST_HEAD(&driver->device_list);

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	driver->kdriver.usb = udriver;

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	driver->bus = &drm_usb_bus;

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	res = usb_register(udriver);

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	return res;

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}

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EXPORT_SYMBOL(drm_usb_init);

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void drm_usb_exit(struct drm_driver *driver,

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		  struct usb_driver *udriver)

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{

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	usb_deregister(udriver);

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}

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EXPORT_SYMBOL(drm_usb_exit);

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#endif

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