1 /*
2 * Copyright 2015-2018 François Tigeot <ftigeot@wolfpond.org>
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #include <linux/device.h>
26
27 #include <drm/drm_sysfs.h>
28 #include <drm/drmP.h>
29 #include "drm_internal.h"
30
drm_sysfs_connector_add(struct drm_connector * connector)31 int drm_sysfs_connector_add(struct drm_connector *connector)
32 {
33 struct drm_device *dev = connector->dev;
34
35 if (connector->kdev)
36 return 0;
37
38 /* Linux uses device_create_with_groups() here */
39 connector->kdev = kzalloc(sizeof(struct device), M_WAITOK);
40 connector->kdev->kobj.name = kasprintf(GFP_KERNEL, "card%d-%s",
41 dev->primary->index,
42 connector->name);
43 DRM_DEBUG("adding \"%s\" to sysfs\n", connector->name);
44
45 return 0;
46 }
47
drm_sysfs_connector_remove(struct drm_connector * connector)48 void drm_sysfs_connector_remove(struct drm_connector *connector)
49 {
50 DRM_DEBUG("removing \"%s\" from sysfs\n", connector->name);
51
52 if (connector->kdev)
53 kfree(connector->kdev);
54 }
55
drm_sysfs_hotplug_event(struct drm_device * dev)56 void drm_sysfs_hotplug_event(struct drm_device *dev)
57 {
58 }
59
drm_class_device_register(struct device * dev)60 int drm_class_device_register(struct device *dev)
61 {
62 return 0;
63 }
64
65 /**
66 * drm_class_device_unregister - unregister device with the DRM sysfs class
67 * @dev: device to unregister
68 *
69 * Unregisters a &struct device from the DRM sysfs class. Essentially only used
70 * by ttm to have a place for its global settings. Drivers should never use
71 * this.
72 */
drm_class_device_unregister(struct device * dev)73 void drm_class_device_unregister(struct device *dev)
74 {
75 }
76
77 extern struct dev_ops drm_cdevsw;
78
drm_sysfs_minor_alloc(struct drm_minor * minor)79 struct device *drm_sysfs_minor_alloc(struct drm_minor *minor)
80 {
81 const char dev_str[12];
82 struct device *kdev;
83 int r;
84 struct cdev *devnode;
85
86 if (minor->type == DRM_MINOR_PRIMARY)
87 ksnprintf(dev_str, sizeof(dev_str), "card%d", minor->index);
88 else if (minor->type == DRM_MINOR_RENDER)
89 ksnprintf(dev_str, sizeof(dev_str), "renderD%d", minor->index);
90 else
91 return NULL;
92
93 kdev = kzalloc(sizeof(*kdev), GFP_KERNEL);
94 if (!kdev)
95 return ERR_PTR(-ENOMEM);
96
97 devnode = make_dev(&drm_cdevsw, minor->index,
98 DRM_DEV_UID, DRM_DEV_GID, DRM_DEV_MODE, "dri/%s", dev_str);
99
100 kdev->parent = minor->dev->dev;
101 dev_set_drvdata(kdev, minor);
102
103 r = dev_set_name(kdev, dev_str);
104 if (r < 0)
105 goto err_free;
106
107 return kdev;
108
109 err_free:
110 return ERR_PTR(r);
111 }
112
113