2 * Copyright (C) 2013, NVIDIA Corporation. All rights reserved.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 #include <linux/err.h>
25 #include <linux/module.h>
27 #include <drm/drm_crtc.h>
28 #include <drm/drm_panel.h>
30 static DEFINE_MUTEX(panel_lock);
31 static LIST_HEAD(panel_list);
33 void drm_panel_init(struct drm_panel *panel)
35 INIT_LIST_HEAD(&panel->list);
37 EXPORT_SYMBOL(drm_panel_init);
39 int drm_panel_add(struct drm_panel *panel)
41 mutex_lock(&panel_lock);
42 list_add_tail(&panel->list, &panel_list);
43 mutex_unlock(&panel_lock);
47 EXPORT_SYMBOL(drm_panel_add);
49 void drm_panel_remove(struct drm_panel *panel)
51 mutex_lock(&panel_lock);
52 list_del_init(&panel->list);
53 mutex_unlock(&panel_lock);
55 EXPORT_SYMBOL(drm_panel_remove);
57 int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector)
62 panel->connector = connector;
63 panel->drm = connector->dev;
67 EXPORT_SYMBOL(drm_panel_attach);
69 int drm_panel_detach(struct drm_panel *panel)
71 panel->connector = NULL;
76 EXPORT_SYMBOL(drm_panel_detach);
78 struct drm_panel *drm_find_panel_by_connector(struct drm_connector *connector)
80 struct drm_panel *panel;
82 mutex_lock(&panel_lock);
84 list_for_each_entry(panel, &panel_list, list) {
85 if (panel->connector == connector) {
86 mutex_unlock(&panel_lock);
91 mutex_unlock(&panel_lock);
94 EXPORT_SYMBOL(drm_find_panel_by_connector);
97 struct drm_panel *of_drm_find_panel(struct device_node *np)
99 struct drm_panel *panel;
101 mutex_lock(&panel_lock);
103 list_for_each_entry(panel, &panel_list, list) {
104 if (panel->dev->of_node == np) {
105 mutex_unlock(&panel_lock);
110 mutex_unlock(&panel_lock);
113 EXPORT_SYMBOL(of_drm_find_panel);
116 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
117 MODULE_DESCRIPTION("DRM panel infrastructure");
118 MODULE_LICENSE("GPL and additional rights");