projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| aead40ea TR |
1 | /* |
| 2 | * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. | |
| 3 | * | |
| 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: | |
| 10 | * | |
| 11 | * The above copyright notice and this permission notice (including the | |
| 12 | * next paragraph) shall be included in all copies or substantial portions | |
| 13 | * of the Software. | |
| 14 | * | |
| 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. | |
| 22 | */ | |
| 23 | ||
| 24 | #include <linux/err.h> | |
| 25 | #include <linux/module.h> | |
| 26 | ||
| 27 | #include <drm/drm_crtc.h> | |
| 28 | #include <drm/drm_panel.h> | |
| 29 | ||
| 30 | static DEFINE_MUTEX(panel_lock); | |
| 31 | static LIST_HEAD(panel_list); | |
| 32 | ||
| 33 | void drm_panel_init(struct drm_panel *panel) | |
| 34 | { | |
| 35 | INIT_LIST_HEAD(&panel->list); | |
| 36 | } | |
| 37 | EXPORT_SYMBOL(drm_panel_init); | |
| 38 | ||
| 39 | int drm_panel_add(struct drm_panel *panel) | |
| 40 | { | |
| 41 | mutex_lock(&panel_lock); | |
| 42 | list_add_tail(&panel->list, &panel_list); | |
| 43 | mutex_unlock(&panel_lock); | |
| 44 | ||
| 45 | return 0; | |
| 46 | } | |
| 47 | EXPORT_SYMBOL(drm_panel_add); | |
| 48 | ||
| 49 | void drm_panel_remove(struct drm_panel *panel) | |
| 50 | { | |
| 51 | mutex_lock(&panel_lock); | |
| 52 | list_del_init(&panel->list); | |
| 53 | mutex_unlock(&panel_lock); | |
| 54 | } | |
| 55 | EXPORT_SYMBOL(drm_panel_remove); | |
| 56 | ||
| 57 | int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector) | |
| 58 | { | |
| 59 | if (panel->connector) | |
| 60 | return -EBUSY; | |
| 61 | ||
| 62 | panel->connector = connector; | |
| 63 | panel->drm = connector->dev; | |
| 64 | ||
| 65 | return 0; | |
| 66 | } | |
| 67 | EXPORT_SYMBOL(drm_panel_attach); | |
| 68 | ||
| 69 | int drm_panel_detach(struct drm_panel *panel) | |
| 70 | { | |
| 71 | panel->connector = NULL; | |
| 72 | panel->drm = NULL; | |
| 73 | ||
| 74 | return 0; | |
| 75 | } | |
| 76 | EXPORT_SYMBOL(drm_panel_detach); | |
| 77 | ||
| 78 | #ifdef CONFIG_OF | |
| 79 | struct drm_panel *of_drm_find_panel(struct device_node *np) | |
| 80 | { | |
| 81 | struct drm_panel *panel; | |
| 82 | ||
| 83 | mutex_lock(&panel_lock); | |
| 84 | ||
| 85 | list_for_each_entry(panel, &panel_list, list) { | |
| 86 | if (panel->dev->of_node == np) { | |
| 87 | mutex_unlock(&panel_lock); | |
| 88 | return panel; | |
| 89 | } | |
| 90 | } | |
| 91 | ||
| 92 | mutex_unlock(&panel_lock); | |
| 93 | return NULL; | |
| 94 | } | |
| 95 | EXPORT_SYMBOL(of_drm_find_panel); | |
| 96 | #endif | |
| 97 | ||
| 98 | MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); | |
| 99 | MODULE_DESCRIPTION("DRM panel infrastructure"); | |
| 100 | MODULE_LICENSE("GPL and additional rights"); |