LXR linux/drivers/gpu/drm/drm

   1/*
   2 * Derived from drm_pci.c
   3 *
   4 * Copyright 2003 José Fonseca.
   5 * Copyright 2003 Leif Delgass.
   6 * Copyright (c) 2009, Code Aurora Forum.
   7 * All Rights Reserved.
   8 *
   9 * Permission is hereby granted, free of charge, to any person obtaining a
  10 * copy of this software and associated documentation files (the "Software"),
  11 * to deal in the Software without restriction, including without limitation
  12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13 * and/or sell copies of the Software, and to permit persons to whom the
  14 * Software is furnished to do so, subject to the following conditions:
  15 *
  16 * The above copyright notice and this permission notice (including the next
  17 * paragraph) shall be included in all copies or substantial portions of the
  18 * Software.
  19 *
  20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  23 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  24 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 */
  27
  28#include <linux/export.h>
  29#include <drm/drmP.h>
  30
  31/*
  32 * Register.
  33 *
  34 * \param platdev - Platform device struture
  35 * \return zero on success or a negative number on failure.
  36 *
  37 * Attempt to gets inter module "drm" information. If we are first
  38 * then register the character device and inter module information.
  39 * Try and register, if we fail to register, backout previous work.
  40 */
  41
  42static int drm_get_platform_dev(struct platform_device *platdev,
  43                                struct drm_driver *driver)
  44{
  45        struct drm_device *dev;
  46        int ret;
  47
  48        DRM_DEBUG("\n");
  49
  50        dev = drm_dev_alloc(driver, &platdev->dev);
  51        if (IS_ERR(dev))
  52                return PTR_ERR(dev);
  53
  54        dev->platformdev = platdev;
  55
  56        ret = drm_dev_register(dev, 0);
  57        if (ret)
  58                goto err_free;
  59
  60        DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
  61                 driver->name, driver->major, driver->minor, driver->patchlevel,
  62                 driver->date, dev->primary->index);
  63
  64        return 0;
  65
  66err_free:
  67        drm_dev_unref(dev);
  68        return ret;
  69}
  70
  71/**
  72 * drm_platform_init - Register a platform device with the DRM subsystem
  73 * @driver: DRM device driver
  74 * @platform_device: platform device to register
  75 *
  76 * Registers the specified DRM device driver and platform device with the DRM
  77 * subsystem, initializing a drm_device structure and calling the driver's
  78 * .load() function.
  79 *
  80 * NOTE: This function is deprecated, please use drm_dev_alloc() and
  81 * drm_dev_register() instead and remove your ->load() callback.
  82 *
  83 * Return: 0 on success or a negative error code on failure.
  84 */
  85int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device)
  86{
  87        DRM_DEBUG("\n");
  88
  89        return drm_get_platform_dev(platform_device, driver);
  90}
  91EXPORT_SYMBOL(drm_platform_init);
  92