| Thierry Reding | aead40e | 2013-08-30 13:36:43 +0200 | [diff] [blame^] | 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"); |