| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 | |
| 42 | static 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 (!dev) |
| 52 | return -ENOMEM; |
| 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 | |
| 66 | err_free: |
| 67 | drm_dev_unref(dev); |
| 68 | return ret; |
| 69 | } |
| 70 | |
| 71 | int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master) |
| 72 | { |
| 73 | int id; |
| 74 | |
| 75 | id = dev->platformdev->id; |
| 76 | if (id < 0) |
| 77 | id = 0; |
| 78 | |
| 79 | master->unique = kasprintf(GFP_KERNEL, "platform:%s:%02d", |
| 80 | dev->platformdev->name, id); |
| 81 | if (!master->unique) |
| 82 | return -ENOMEM; |
| 83 | |
| 84 | master->unique_len = strlen(master->unique); |
| 85 | return 0; |
| 86 | } |
| 87 | EXPORT_SYMBOL(drm_platform_set_busid); |
| 88 | |
| 89 | /** |
| 90 | * drm_platform_init - Register a platform device with the DRM subsystem |
| 91 | * @driver: DRM device driver |
| 92 | * @platform_device: platform device to register |
| 93 | * |
| 94 | * Registers the specified DRM device driver and platform device with the DRM |
| 95 | * subsystem, initializing a drm_device structure and calling the driver's |
| 96 | * .load() function. |
| 97 | * |
| 98 | * NOTE: This function is deprecated, please use drm_dev_alloc() and |
| 99 | * drm_dev_register() instead and remove your ->load() callback. |
| 100 | * |
| 101 | * Return: 0 on success or a negative error code on failure. |
| 102 | */ |
| 103 | int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device) |
| 104 | { |
| 105 | DRM_DEBUG("\n"); |
| 106 | |
| 107 | return drm_get_platform_dev(platform_device, driver); |
| 108 | } |
| 109 | EXPORT_SYMBOL(drm_platform_init); |