mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 00:17:44 +00:00
c6a1af8a16
Describe how devices are registered using the drm_*_init() functions.
Adding this to docbook requires a largish set of changes to the comments
in drm_{pci,usb,platform}.c since they are doxygen-style rather than
proper kernel-doc and therefore mess with the docbook generation.
While at it, mark usage of drm_put_dev() as discouraged in favour of
calling drm_dev_unregister() and drm_dev_unref() directly.
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
#include <drm/drmP.h>
|
|
#include <drm/drm_usb.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/module.h>
|
|
|
|
int drm_get_usb_dev(struct usb_interface *interface,
|
|
const struct usb_device_id *id,
|
|
struct drm_driver *driver)
|
|
{
|
|
struct drm_device *dev;
|
|
int ret;
|
|
|
|
DRM_DEBUG("\n");
|
|
|
|
dev = drm_dev_alloc(driver, &interface->dev);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
dev->usbdev = interface_to_usbdev(interface);
|
|
usb_set_intfdata(interface, dev);
|
|
|
|
ret = drm_dev_register(dev, 0);
|
|
if (ret)
|
|
goto err_free;
|
|
|
|
DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
|
|
driver->name, driver->major, driver->minor, driver->patchlevel,
|
|
driver->date, dev->primary->index);
|
|
|
|
return 0;
|
|
|
|
err_free:
|
|
drm_dev_unref(dev);
|
|
return ret;
|
|
|
|
}
|
|
EXPORT_SYMBOL(drm_get_usb_dev);
|
|
|
|
static int drm_usb_set_busid(struct drm_device *dev,
|
|
struct drm_master *master)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct drm_bus drm_usb_bus = {
|
|
.set_busid = drm_usb_set_busid,
|
|
};
|
|
|
|
/**
|
|
* drm_usb_init - Register matching USB devices with the DRM subsystem
|
|
* @driver: DRM device driver
|
|
* @udriver: USB device driver
|
|
*
|
|
* Registers one or more devices matched by a USB driver with the DRM
|
|
* subsystem.
|
|
*
|
|
* Return: 0 on success or a negative error code on failure.
|
|
*/
|
|
int drm_usb_init(struct drm_driver *driver, struct usb_driver *udriver)
|
|
{
|
|
int res;
|
|
DRM_DEBUG("\n");
|
|
|
|
driver->bus = &drm_usb_bus;
|
|
|
|
res = usb_register(udriver);
|
|
return res;
|
|
}
|
|
EXPORT_SYMBOL(drm_usb_init);
|
|
|
|
/**
|
|
* drm_usb_exit - Unregister matching USB devices from the DRM subsystem
|
|
* @driver: DRM device driver
|
|
* @udriver: USB device driver
|
|
*
|
|
* Unregisters one or more devices matched by a USB driver from the DRM
|
|
* subsystem.
|
|
*/
|
|
void drm_usb_exit(struct drm_driver *driver,
|
|
struct usb_driver *udriver)
|
|
{
|
|
usb_deregister(udriver);
|
|
}
|
|
EXPORT_SYMBOL(drm_usb_exit);
|
|
|
|
MODULE_AUTHOR("David Airlie");
|
|
MODULE_DESCRIPTION("USB DRM support");
|
|
MODULE_LICENSE("GPL and additional rights");
|