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6084 | serge | 1 | /* |
2 | * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. |
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3 | * |
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4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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5 | * copy of this software and associated documentation files (the "Software"), |
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6 | * to deal in the Software without restriction, including without limitation |
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7 | * the rights to use, copy, modify, merge, publish, distribute, sub license, |
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8 | * and/or sell copies of the Software, and to permit persons to whom the |
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9 | * Software is furnished to do so, subject to the following conditions: |
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10 | * |
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11 | * The above copyright notice and this permission notice (including the |
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12 | * next paragraph) shall be included in all copies or substantial portions |
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13 | * of the Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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21 | * DEALINGS IN THE SOFTWARE. |
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22 | */ |
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23 | |||
24 | #include |
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25 | #include |
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26 | |||
27 | #include |
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28 | #include |
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29 | |||
30 | static DEFINE_MUTEX(panel_lock); |
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31 | static LIST_HEAD(panel_list); |
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32 | |||
33 | void drm_panel_init(struct drm_panel *panel) |
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34 | { |
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35 | INIT_LIST_HEAD(&panel->list); |
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36 | } |
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37 | EXPORT_SYMBOL(drm_panel_init); |
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38 | |||
39 | int drm_panel_add(struct drm_panel *panel) |
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40 | { |
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41 | mutex_lock(&panel_lock); |
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42 | list_add_tail(&panel->list, &panel_list); |
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43 | mutex_unlock(&panel_lock); |
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44 | |||
45 | return 0; |
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46 | } |
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47 | EXPORT_SYMBOL(drm_panel_add); |
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48 | |||
49 | void drm_panel_remove(struct drm_panel *panel) |
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50 | { |
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51 | mutex_lock(&panel_lock); |
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52 | list_del_init(&panel->list); |
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53 | mutex_unlock(&panel_lock); |
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54 | } |
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55 | EXPORT_SYMBOL(drm_panel_remove); |
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56 | |||
57 | int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector) |
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58 | { |
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59 | if (panel->connector) |
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60 | return -EBUSY; |
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61 | |||
62 | panel->connector = connector; |
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63 | panel->drm = connector->dev; |
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64 | |||
65 | return 0; |
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66 | } |
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67 | EXPORT_SYMBOL(drm_panel_attach); |
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68 | |||
69 | int drm_panel_detach(struct drm_panel *panel) |
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70 | { |
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71 | panel->connector = NULL; |
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72 | panel->drm = NULL; |
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73 | |||
74 | return 0; |
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75 | } |
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76 | EXPORT_SYMBOL(drm_panel_detach); |
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77 | |||
78 | #ifdef CONFIG_OF |
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79 | struct drm_panel *of_drm_find_panel(struct device_node *np) |
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80 | { |
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81 | struct drm_panel *panel; |
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82 | |||
83 | mutex_lock(&panel_lock); |
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84 | |||
85 | list_for_each_entry(panel, &panel_list, list) { |
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86 | if (panel->dev->of_node == np) { |
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87 | mutex_unlock(&panel_lock); |
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88 | return panel; |
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89 | } |
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90 | } |
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91 | |||
92 | mutex_unlock(&panel_lock); |
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93 | return NULL; |
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94 | } |
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95 | EXPORT_SYMBOL(of_drm_find_panel); |
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96 | #endif |
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97 | |||
98 | MODULE_AUTHOR("Thierry Reding |
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99 | MODULE_DESCRIPTION("DRM panel infrastructure"); |
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100 | MODULE_LICENSE("GPL and additional rights"); |