blob: 5314c9d5fef473daeb14677f08497780e87ef987 [file] [log] [blame]
Jordan Crousedcdb1672010-05-27 13:40:25 -06001/*
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
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040028#include <linux/export.h>
David Howells760285e2012-10-02 18:01:07 +010029#include <drm/drmP.h>
Jordan Crousedcdb1672010-05-27 13:40:25 -060030
Lespiau, Damien66cc8b62013-08-20 00:53:10 +010031/*
Jordan Crousedcdb1672010-05-27 13:40:25 -060032 * 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
Lespiau, Damien66cc8b62013-08-20 00:53:10 +010042static int drm_get_platform_dev(struct platform_device *platdev,
43 struct drm_driver *driver)
Jordan Crousedcdb1672010-05-27 13:40:25 -060044{
45 struct drm_device *dev;
46 int ret;
47
48 DRM_DEBUG("\n");
49
David Herrmann1bb72532013-10-02 11:23:34 +020050 dev = drm_dev_alloc(driver, &platdev->dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -060051 if (!dev)
52 return -ENOMEM;
53
54 dev->platformdev = platdev;
Jordan Crousedcdb1672010-05-27 13:40:25 -060055
David Herrmannc22f0ac2013-10-02 11:23:35 +020056 ret = drm_dev_register(dev, 0);
Jordan Crousedcdb1672010-05-27 13:40:25 -060057 if (ret)
David Herrmannc22f0ac2013-10-02 11:23:35 +020058 goto err_free;
Dave Airlieb64c1152010-09-14 20:14:38 +100059
Jordan Crousedcdb1672010-05-27 13:40:25 -060060 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
David Herrmannc22f0ac2013-10-02 11:23:35 +020066err_free:
David Herrmann099d1c22014-01-29 10:21:36 +010067 drm_dev_unref(dev);
Jordan Crousedcdb1672010-05-27 13:40:25 -060068 return ret;
69}
Jordan Crousedcdb1672010-05-27 13:40:25 -060070
David Herrmann915b4d12014-08-29 12:12:43 +020071int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
Dave Airlie8410ea32010-12-15 03:16:38 +100072{
David Herrmannd0a39162014-08-29 12:12:41 +020073 int id;
Dave Airlie8410ea32010-12-15 03:16:38 +100074
Rob Clarkb19c19a2012-03-06 10:20:36 -060075 id = dev->platformdev->id;
David Herrmannd0a39162014-08-29 12:12:41 +020076 if (id < 0)
Rob Clarkb19c19a2012-03-06 10:20:36 -060077 id = 0;
78
David Herrmannd0a39162014-08-29 12:12:41 +020079 master->unique = kasprintf(GFP_KERNEL, "platform:%s:%02d",
80 dev->platformdev->name, id);
81 if (!master->unique)
82 return -ENOMEM;
Dave Airlie8410ea32010-12-15 03:16:38 +100083
David Herrmannd0a39162014-08-29 12:12:41 +020084 master->unique_len = strlen(master->unique);
Dave Airlie8410ea32010-12-15 03:16:38 +100085 return 0;
Dave Airlie8410ea32010-12-15 03:16:38 +100086}
David Herrmann915b4d12014-08-29 12:12:43 +020087EXPORT_SYMBOL(drm_platform_set_busid);
Dave Airlie8410ea32010-12-15 03:16:38 +100088
Jordan Crousedcdb1672010-05-27 13:40:25 -060089/**
Thierry Redingc6a1af8a2014-05-19 13:39:07 +020090 * drm_platform_init - Register a platform device with the DRM subsystem
91 * @driver: DRM device driver
92 * @platform_device: platform device to register
Jordan Crousedcdb1672010-05-27 13:40:25 -060093 *
Thierry Redingc6a1af8a2014-05-19 13:39:07 +020094 * 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.
Jordan Crousedcdb1672010-05-27 13:40:25 -060097 *
Thierry Redingc6a1af8a2014-05-19 13:39:07 +020098 * Return: 0 on success or a negative error code on failure.
Jordan Crousedcdb1672010-05-27 13:40:25 -060099 */
Dave Airlie8410ea32010-12-15 03:16:38 +1000100int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device)
Jordan Crousedcdb1672010-05-27 13:40:25 -0600101{
Dave Airlie8410ea32010-12-15 03:16:38 +1000102 DRM_DEBUG("\n");
103
Dave Airlie8410ea32010-12-15 03:16:38 +1000104 return drm_get_platform_dev(platform_device, driver);
Jordan Crousedcdb1672010-05-27 13:40:25 -0600105}
Dave Airlie8410ea32010-12-15 03:16:38 +1000106EXPORT_SYMBOL(drm_platform_init);