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5271 | serge | 1 | /* |
2 | * Copyright (C) 2014 Red Hat |
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3 | * Copyright (C) 2014 Intel Corp. |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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6 | * copy of this software and associated documentation files (the "Software"), |
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7 | * to deal in the Software without restriction, including without limitation |
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8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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9 | * and/or sell copies of the Software, and to permit persons to whom the |
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10 | * Software is furnished to do so, subject to the following conditions: |
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11 | * |
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12 | * The above copyright notice and this permission notice shall be included in |
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13 | * all copies or substantial portions 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 NONINFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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21 | * OTHER DEALINGS IN THE SOFTWARE. |
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22 | * |
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23 | * Authors: |
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24 | * Rob Clark |
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25 | * Daniel Vetter |
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26 | */ |
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27 | |||
28 | |||
29 | #include |
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30 | #include |
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31 | #include |
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32 | |||
6084 | serge | 33 | /** |
34 | * drm_atomic_state_default_release - |
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35 | * release memory initialized by drm_atomic_state_init |
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36 | * @state: atomic state |
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37 | * |
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38 | * Free all the memory allocated by drm_atomic_state_init. |
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39 | * This is useful for drivers that subclass the atomic state. |
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40 | */ |
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41 | void drm_atomic_state_default_release(struct drm_atomic_state *state) |
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5271 | serge | 42 | { |
43 | kfree(state->connectors); |
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44 | kfree(state->connector_states); |
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45 | kfree(state->crtcs); |
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46 | kfree(state->crtc_states); |
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47 | kfree(state->planes); |
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48 | kfree(state->plane_states); |
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49 | } |
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6084 | serge | 50 | EXPORT_SYMBOL(drm_atomic_state_default_release); |
5271 | serge | 51 | |
52 | /** |
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6084 | serge | 53 | * drm_atomic_state_init - init new atomic state |
5271 | serge | 54 | * @dev: DRM device |
6084 | serge | 55 | * @state: atomic state |
5271 | serge | 56 | * |
6084 | serge | 57 | * Default implementation for filling in a new atomic state. |
58 | * This is useful for drivers that subclass the atomic state. |
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5271 | serge | 59 | */ |
6084 | serge | 60 | int |
61 | drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state) |
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5271 | serge | 62 | { |
6084 | serge | 63 | /* TODO legacy paths should maybe do a better job about |
64 | * setting this appropriately? |
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65 | */ |
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66 | state->allow_modeset = true; |
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5271 | serge | 67 | |
68 | state->num_connector = ACCESS_ONCE(dev->mode_config.num_connector); |
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69 | |||
70 | state->crtcs = kcalloc(dev->mode_config.num_crtc, |
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71 | sizeof(*state->crtcs), GFP_KERNEL); |
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72 | if (!state->crtcs) |
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73 | goto fail; |
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74 | state->crtc_states = kcalloc(dev->mode_config.num_crtc, |
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75 | sizeof(*state->crtc_states), GFP_KERNEL); |
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76 | if (!state->crtc_states) |
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77 | goto fail; |
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78 | state->planes = kcalloc(dev->mode_config.num_total_plane, |
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79 | sizeof(*state->planes), GFP_KERNEL); |
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80 | if (!state->planes) |
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81 | goto fail; |
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82 | state->plane_states = kcalloc(dev->mode_config.num_total_plane, |
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83 | sizeof(*state->plane_states), GFP_KERNEL); |
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84 | if (!state->plane_states) |
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85 | goto fail; |
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86 | state->connectors = kcalloc(state->num_connector, |
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87 | sizeof(*state->connectors), |
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88 | GFP_KERNEL); |
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89 | if (!state->connectors) |
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90 | goto fail; |
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91 | state->connector_states = kcalloc(state->num_connector, |
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92 | sizeof(*state->connector_states), |
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93 | GFP_KERNEL); |
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94 | if (!state->connector_states) |
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95 | goto fail; |
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96 | |||
97 | state->dev = dev; |
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98 | |||
6084 | serge | 99 | DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state); |
5271 | serge | 100 | |
6084 | serge | 101 | return 0; |
5271 | serge | 102 | fail: |
6084 | serge | 103 | drm_atomic_state_default_release(state); |
104 | return -ENOMEM; |
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105 | } |
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106 | EXPORT_SYMBOL(drm_atomic_state_init); |
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5271 | serge | 107 | |
6084 | serge | 108 | /** |
109 | * drm_atomic_state_alloc - allocate atomic state |
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110 | * @dev: DRM device |
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111 | * |
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112 | * This allocates an empty atomic state to track updates. |
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113 | */ |
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114 | struct drm_atomic_state * |
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115 | drm_atomic_state_alloc(struct drm_device *dev) |
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116 | { |
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117 | struct drm_mode_config *config = &dev->mode_config; |
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118 | struct drm_atomic_state *state; |
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119 | |||
120 | if (!config->funcs->atomic_state_alloc) { |
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121 | state = kzalloc(sizeof(*state), GFP_KERNEL); |
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122 | if (!state) |
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123 | return NULL; |
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124 | if (drm_atomic_state_init(dev, state) < 0) { |
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125 | kfree(state); |
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126 | return NULL; |
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127 | } |
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128 | return state; |
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129 | } |
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130 | |||
131 | return config->funcs->atomic_state_alloc(dev); |
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5271 | serge | 132 | } |
133 | EXPORT_SYMBOL(drm_atomic_state_alloc); |
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134 | |||
135 | /** |
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6084 | serge | 136 | * drm_atomic_state_default_clear - clear base atomic state |
5271 | serge | 137 | * @state: atomic state |
138 | * |
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6084 | serge | 139 | * Default implementation for clearing atomic state. |
140 | * This is useful for drivers that subclass the atomic state. |
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5271 | serge | 141 | */ |
6084 | serge | 142 | void drm_atomic_state_default_clear(struct drm_atomic_state *state) |
5271 | serge | 143 | { |
144 | struct drm_device *dev = state->dev; |
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145 | struct drm_mode_config *config = &dev->mode_config; |
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146 | int i; |
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147 | |||
6084 | serge | 148 | DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state); |
5271 | serge | 149 | |
150 | for (i = 0; i < state->num_connector; i++) { |
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151 | struct drm_connector *connector = state->connectors[i]; |
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152 | |||
153 | if (!connector) |
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154 | continue; |
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155 | |||
6084 | serge | 156 | /* |
157 | * FIXME: Async commits can race with connector unplugging and |
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158 | * there's currently nothing that prevents cleanup up state for |
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159 | * deleted connectors. As long as the callback doesn't look at |
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160 | * the connector we'll be fine though, so make sure that's the |
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161 | * case by setting all connector pointers to NULL. |
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162 | */ |
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163 | state->connector_states[i]->connector = NULL; |
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164 | connector->funcs->atomic_destroy_state(NULL, |
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5271 | serge | 165 | state->connector_states[i]); |
6084 | serge | 166 | state->connectors[i] = NULL; |
167 | state->connector_states[i] = NULL; |
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5271 | serge | 168 | } |
169 | |||
170 | for (i = 0; i < config->num_crtc; i++) { |
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171 | struct drm_crtc *crtc = state->crtcs[i]; |
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172 | |||
173 | if (!crtc) |
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174 | continue; |
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175 | |||
176 | crtc->funcs->atomic_destroy_state(crtc, |
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177 | state->crtc_states[i]); |
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6084 | serge | 178 | state->crtcs[i] = NULL; |
179 | state->crtc_states[i] = NULL; |
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5271 | serge | 180 | } |
181 | |||
182 | for (i = 0; i < config->num_total_plane; i++) { |
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183 | struct drm_plane *plane = state->planes[i]; |
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184 | |||
185 | if (!plane) |
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186 | continue; |
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187 | |||
188 | plane->funcs->atomic_destroy_state(plane, |
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189 | state->plane_states[i]); |
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6084 | serge | 190 | state->planes[i] = NULL; |
191 | state->plane_states[i] = NULL; |
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5271 | serge | 192 | } |
193 | } |
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6084 | serge | 194 | EXPORT_SYMBOL(drm_atomic_state_default_clear); |
195 | |||
196 | /** |
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197 | * drm_atomic_state_clear - clear state object |
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198 | * @state: atomic state |
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199 | * |
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200 | * When the w/w mutex algorithm detects a deadlock we need to back off and drop |
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201 | * all locks. So someone else could sneak in and change the current modeset |
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202 | * configuration. Which means that all the state assembled in @state is no |
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203 | * longer an atomic update to the current state, but to some arbitrary earlier |
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204 | * state. Which could break assumptions the driver's ->atomic_check likely |
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205 | * relies on. |
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206 | * |
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207 | * Hence we must clear all cached state and completely start over, using this |
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208 | * function. |
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209 | */ |
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210 | void drm_atomic_state_clear(struct drm_atomic_state *state) |
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211 | { |
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212 | struct drm_device *dev = state->dev; |
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213 | struct drm_mode_config *config = &dev->mode_config; |
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214 | |||
215 | if (config->funcs->atomic_state_clear) |
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216 | config->funcs->atomic_state_clear(state); |
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217 | else |
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218 | drm_atomic_state_default_clear(state); |
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219 | } |
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5271 | serge | 220 | EXPORT_SYMBOL(drm_atomic_state_clear); |
221 | |||
222 | /** |
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223 | * drm_atomic_state_free - free all memory for an atomic state |
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224 | * @state: atomic state to deallocate |
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225 | * |
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226 | * This frees all memory associated with an atomic state, including all the |
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227 | * per-object state for planes, crtcs and connectors. |
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228 | */ |
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229 | void drm_atomic_state_free(struct drm_atomic_state *state) |
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230 | { |
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6084 | serge | 231 | struct drm_device *dev; |
232 | struct drm_mode_config *config; |
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233 | |||
234 | if (!state) |
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235 | return; |
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236 | |||
237 | dev = state->dev; |
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238 | config = &dev->mode_config; |
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239 | |||
5271 | serge | 240 | drm_atomic_state_clear(state); |
241 | |||
6084 | serge | 242 | DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state); |
5271 | serge | 243 | |
6084 | serge | 244 | if (config->funcs->atomic_state_free) { |
245 | config->funcs->atomic_state_free(state); |
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246 | } else { |
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247 | drm_atomic_state_default_release(state); |
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248 | kfree(state); |
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249 | } |
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5271 | serge | 250 | } |
251 | EXPORT_SYMBOL(drm_atomic_state_free); |
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252 | |||
253 | /** |
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254 | * drm_atomic_get_crtc_state - get crtc state |
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255 | * @state: global atomic state object |
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256 | * @crtc: crtc to get state object for |
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257 | * |
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258 | * This function returns the crtc state for the given crtc, allocating it if |
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259 | * needed. It will also grab the relevant crtc lock to make sure that the state |
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260 | * is consistent. |
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261 | * |
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262 | * Returns: |
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263 | * |
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264 | * Either the allocated state or the error code encoded into the pointer. When |
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265 | * the error is EDEADLK then the w/w mutex code has detected a deadlock and the |
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266 | * entire atomic sequence must be restarted. All other errors are fatal. |
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267 | */ |
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268 | struct drm_crtc_state * |
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269 | drm_atomic_get_crtc_state(struct drm_atomic_state *state, |
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270 | struct drm_crtc *crtc) |
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271 | { |
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6084 | serge | 272 | int ret, index = drm_crtc_index(crtc); |
5271 | serge | 273 | struct drm_crtc_state *crtc_state; |
274 | |||
6084 | serge | 275 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); |
276 | if (crtc_state) |
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277 | return crtc_state; |
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5271 | serge | 278 | |
279 | ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); |
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280 | if (ret) |
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281 | return ERR_PTR(ret); |
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282 | |||
283 | crtc_state = crtc->funcs->atomic_duplicate_state(crtc); |
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284 | if (!crtc_state) |
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285 | return ERR_PTR(-ENOMEM); |
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286 | |||
287 | state->crtc_states[index] = crtc_state; |
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288 | state->crtcs[index] = crtc; |
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289 | crtc_state->state = state; |
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290 | |||
6084 | serge | 291 | DRM_DEBUG_ATOMIC("Added [CRTC:%d] %p state to %p\n", |
292 | crtc->base.id, crtc_state, state); |
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5271 | serge | 293 | |
294 | return crtc_state; |
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295 | } |
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296 | EXPORT_SYMBOL(drm_atomic_get_crtc_state); |
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297 | |||
298 | /** |
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6084 | serge | 299 | * drm_atomic_set_mode_for_crtc - set mode for CRTC |
300 | * @state: the CRTC whose incoming state to update |
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301 | * @mode: kernel-internal mode to use for the CRTC, or NULL to disable |
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302 | * |
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303 | * Set a mode (originating from the kernel) on the desired CRTC state. Does |
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304 | * not change any other state properties, including enable, active, or |
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305 | * mode_changed. |
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306 | * |
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307 | * RETURNS: |
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308 | * Zero on success, error code on failure. Cannot return -EDEADLK. |
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309 | */ |
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310 | int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, |
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311 | struct drm_display_mode *mode) |
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312 | { |
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313 | struct drm_mode_modeinfo umode; |
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314 | |||
315 | /* Early return for no change. */ |
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316 | if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0) |
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317 | return 0; |
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318 | |||
319 | if (state->mode_blob) |
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320 | drm_property_unreference_blob(state->mode_blob); |
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321 | state->mode_blob = NULL; |
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322 | |||
323 | if (mode) { |
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324 | drm_mode_convert_to_umode(&umode, mode); |
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325 | state->mode_blob = |
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326 | drm_property_create_blob(state->crtc->dev, |
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327 | sizeof(umode), |
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328 | &umode); |
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329 | if (IS_ERR(state->mode_blob)) |
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330 | return PTR_ERR(state->mode_blob); |
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331 | |||
332 | drm_mode_copy(&state->mode, mode); |
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333 | state->enable = true; |
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334 | DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n", |
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335 | mode->name, state); |
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336 | } else { |
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337 | memset(&state->mode, 0, sizeof(state->mode)); |
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338 | state->enable = false; |
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339 | DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n", |
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340 | state); |
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341 | } |
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342 | |||
343 | return 0; |
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344 | } |
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345 | EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc); |
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346 | |||
347 | /** |
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348 | * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC |
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349 | * @state: the CRTC whose incoming state to update |
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350 | * @blob: pointer to blob property to use for mode |
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351 | * |
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352 | * Set a mode (originating from a blob property) on the desired CRTC state. |
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353 | * This function will take a reference on the blob property for the CRTC state, |
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354 | * and release the reference held on the state's existing mode property, if any |
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355 | * was set. |
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356 | * |
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357 | * RETURNS: |
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358 | * Zero on success, error code on failure. Cannot return -EDEADLK. |
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359 | */ |
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360 | int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, |
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361 | struct drm_property_blob *blob) |
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362 | { |
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363 | if (blob == state->mode_blob) |
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364 | return 0; |
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365 | |||
366 | if (state->mode_blob) |
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367 | drm_property_unreference_blob(state->mode_blob); |
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368 | state->mode_blob = NULL; |
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369 | |||
370 | if (blob) { |
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371 | if (blob->length != sizeof(struct drm_mode_modeinfo) || |
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372 | drm_mode_convert_umode(&state->mode, |
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373 | (const struct drm_mode_modeinfo *) |
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374 | blob->data)) |
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375 | return -EINVAL; |
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376 | |||
377 | state->mode_blob = drm_property_reference_blob(blob); |
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378 | state->enable = true; |
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379 | DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n", |
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380 | state->mode.name, state); |
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381 | } else { |
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382 | memset(&state->mode, 0, sizeof(state->mode)); |
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383 | state->enable = false; |
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384 | DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n", |
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385 | state); |
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386 | } |
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387 | |||
388 | return 0; |
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389 | } |
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390 | EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); |
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391 | |||
392 | /** |
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393 | * drm_atomic_crtc_set_property - set property on CRTC |
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394 | * @crtc: the drm CRTC to set a property on |
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395 | * @state: the state object to update with the new property value |
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396 | * @property: the property to set |
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397 | * @val: the new property value |
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398 | * |
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399 | * Use this instead of calling crtc->atomic_set_property directly. |
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400 | * This function handles generic/core properties and calls out to |
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401 | * driver's ->atomic_set_property() for driver properties. To ensure |
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402 | * consistent behavior you must call this function rather than the |
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403 | * driver hook directly. |
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404 | * |
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405 | * RETURNS: |
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406 | * Zero on success, error code on failure |
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407 | */ |
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408 | int drm_atomic_crtc_set_property(struct drm_crtc *crtc, |
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409 | struct drm_crtc_state *state, struct drm_property *property, |
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410 | uint64_t val) |
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411 | { |
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412 | struct drm_device *dev = crtc->dev; |
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413 | struct drm_mode_config *config = &dev->mode_config; |
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414 | int ret; |
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415 | |||
416 | if (property == config->prop_active) |
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417 | state->active = val; |
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418 | else if (property == config->prop_mode_id) { |
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419 | struct drm_property_blob *mode = |
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420 | drm_property_lookup_blob(dev, val); |
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421 | ret = drm_atomic_set_mode_prop_for_crtc(state, mode); |
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422 | if (mode) |
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423 | drm_property_unreference_blob(mode); |
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424 | return ret; |
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425 | } |
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426 | else if (crtc->funcs->atomic_set_property) |
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427 | return crtc->funcs->atomic_set_property(crtc, state, property, val); |
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428 | else |
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429 | return -EINVAL; |
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430 | |||
431 | return 0; |
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432 | } |
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433 | EXPORT_SYMBOL(drm_atomic_crtc_set_property); |
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434 | |||
435 | /* |
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436 | * This function handles generic/core properties and calls out to |
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437 | * driver's ->atomic_get_property() for driver properties. To ensure |
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438 | * consistent behavior you must call this function rather than the |
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439 | * driver hook directly. |
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440 | */ |
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441 | static int |
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442 | drm_atomic_crtc_get_property(struct drm_crtc *crtc, |
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443 | const struct drm_crtc_state *state, |
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444 | struct drm_property *property, uint64_t *val) |
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445 | { |
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446 | struct drm_device *dev = crtc->dev; |
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447 | struct drm_mode_config *config = &dev->mode_config; |
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448 | |||
449 | if (property == config->prop_active) |
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450 | *val = state->active; |
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451 | else if (property == config->prop_mode_id) |
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452 | *val = (state->mode_blob) ? state->mode_blob->base.id : 0; |
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453 | else if (crtc->funcs->atomic_get_property) |
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454 | return crtc->funcs->atomic_get_property(crtc, state, property, val); |
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455 | else |
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456 | return -EINVAL; |
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457 | |||
458 | return 0; |
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459 | } |
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460 | |||
461 | /** |
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462 | * drm_atomic_crtc_check - check crtc state |
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463 | * @crtc: crtc to check |
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464 | * @state: crtc state to check |
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465 | * |
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466 | * Provides core sanity checks for crtc state. |
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467 | * |
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468 | * RETURNS: |
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469 | * Zero on success, error code on failure |
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470 | */ |
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471 | static int drm_atomic_crtc_check(struct drm_crtc *crtc, |
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472 | struct drm_crtc_state *state) |
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473 | { |
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474 | /* NOTE: we explicitly don't enforce constraints such as primary |
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475 | * layer covering entire screen, since that is something we want |
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476 | * to allow (on hw that supports it). For hw that does not, it |
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477 | * should be checked in driver's crtc->atomic_check() vfunc. |
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478 | * |
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479 | * TODO: Add generic modeset state checks once we support those. |
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480 | */ |
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481 | |||
482 | if (state->active && !state->enable) { |
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483 | DRM_DEBUG_ATOMIC("[CRTC:%d] active without enabled\n", |
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484 | crtc->base.id); |
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485 | return -EINVAL; |
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486 | } |
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487 | |||
488 | /* The state->enable vs. state->mode_blob checks can be WARN_ON, |
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489 | * as this is a kernel-internal detail that userspace should never |
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490 | * be able to trigger. */ |
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491 | if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && |
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492 | WARN_ON(state->enable && !state->mode_blob)) { |
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493 | DRM_DEBUG_ATOMIC("[CRTC:%d] enabled without mode blob\n", |
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494 | crtc->base.id); |
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495 | return -EINVAL; |
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496 | } |
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497 | |||
498 | if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && |
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499 | WARN_ON(!state->enable && state->mode_blob)) { |
||
500 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled with mode blob\n", |
||
501 | crtc->base.id); |
||
502 | return -EINVAL; |
||
503 | } |
||
504 | |||
505 | return 0; |
||
506 | } |
||
507 | |||
508 | /** |
||
5271 | serge | 509 | * drm_atomic_get_plane_state - get plane state |
510 | * @state: global atomic state object |
||
511 | * @plane: plane to get state object for |
||
512 | * |
||
513 | * This function returns the plane state for the given plane, allocating it if |
||
514 | * needed. It will also grab the relevant plane lock to make sure that the state |
||
515 | * is consistent. |
||
516 | * |
||
517 | * Returns: |
||
518 | * |
||
519 | * Either the allocated state or the error code encoded into the pointer. When |
||
520 | * the error is EDEADLK then the w/w mutex code has detected a deadlock and the |
||
521 | * entire atomic sequence must be restarted. All other errors are fatal. |
||
522 | */ |
||
523 | struct drm_plane_state * |
||
524 | drm_atomic_get_plane_state(struct drm_atomic_state *state, |
||
525 | struct drm_plane *plane) |
||
526 | { |
||
6084 | serge | 527 | int ret, index = drm_plane_index(plane); |
5271 | serge | 528 | struct drm_plane_state *plane_state; |
529 | |||
6084 | serge | 530 | plane_state = drm_atomic_get_existing_plane_state(state, plane); |
531 | if (plane_state) |
||
532 | return plane_state; |
||
5271 | serge | 533 | |
534 | ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx); |
||
535 | if (ret) |
||
536 | return ERR_PTR(ret); |
||
537 | |||
538 | plane_state = plane->funcs->atomic_duplicate_state(plane); |
||
539 | if (!plane_state) |
||
540 | return ERR_PTR(-ENOMEM); |
||
541 | |||
542 | state->plane_states[index] = plane_state; |
||
543 | state->planes[index] = plane; |
||
544 | plane_state->state = state; |
||
545 | |||
6084 | serge | 546 | DRM_DEBUG_ATOMIC("Added [PLANE:%d] %p state to %p\n", |
547 | plane->base.id, plane_state, state); |
||
5271 | serge | 548 | |
549 | if (plane_state->crtc) { |
||
550 | struct drm_crtc_state *crtc_state; |
||
551 | |||
552 | crtc_state = drm_atomic_get_crtc_state(state, |
||
553 | plane_state->crtc); |
||
554 | if (IS_ERR(crtc_state)) |
||
555 | return ERR_CAST(crtc_state); |
||
556 | } |
||
557 | |||
558 | return plane_state; |
||
559 | } |
||
560 | EXPORT_SYMBOL(drm_atomic_get_plane_state); |
||
561 | |||
562 | /** |
||
6084 | serge | 563 | * drm_atomic_plane_set_property - set property on plane |
564 | * @plane: the drm plane to set a property on |
||
565 | * @state: the state object to update with the new property value |
||
566 | * @property: the property to set |
||
567 | * @val: the new property value |
||
568 | * |
||
569 | * Use this instead of calling plane->atomic_set_property directly. |
||
570 | * This function handles generic/core properties and calls out to |
||
571 | * driver's ->atomic_set_property() for driver properties. To ensure |
||
572 | * consistent behavior you must call this function rather than the |
||
573 | * driver hook directly. |
||
574 | * |
||
575 | * RETURNS: |
||
576 | * Zero on success, error code on failure |
||
577 | */ |
||
578 | int drm_atomic_plane_set_property(struct drm_plane *plane, |
||
579 | struct drm_plane_state *state, struct drm_property *property, |
||
580 | uint64_t val) |
||
581 | { |
||
582 | struct drm_device *dev = plane->dev; |
||
583 | struct drm_mode_config *config = &dev->mode_config; |
||
584 | |||
585 | if (property == config->prop_fb_id) { |
||
586 | struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, val); |
||
587 | drm_atomic_set_fb_for_plane(state, fb); |
||
588 | if (fb) |
||
589 | drm_framebuffer_unreference(fb); |
||
590 | } else if (property == config->prop_crtc_id) { |
||
591 | struct drm_crtc *crtc = drm_crtc_find(dev, val); |
||
592 | return drm_atomic_set_crtc_for_plane(state, crtc); |
||
593 | } else if (property == config->prop_crtc_x) { |
||
594 | state->crtc_x = U642I64(val); |
||
595 | } else if (property == config->prop_crtc_y) { |
||
596 | state->crtc_y = U642I64(val); |
||
597 | } else if (property == config->prop_crtc_w) { |
||
598 | state->crtc_w = val; |
||
599 | } else if (property == config->prop_crtc_h) { |
||
600 | state->crtc_h = val; |
||
601 | } else if (property == config->prop_src_x) { |
||
602 | state->src_x = val; |
||
603 | } else if (property == config->prop_src_y) { |
||
604 | state->src_y = val; |
||
605 | } else if (property == config->prop_src_w) { |
||
606 | state->src_w = val; |
||
607 | } else if (property == config->prop_src_h) { |
||
608 | state->src_h = val; |
||
609 | } else if (property == config->rotation_property) { |
||
610 | state->rotation = val; |
||
611 | } else if (plane->funcs->atomic_set_property) { |
||
612 | return plane->funcs->atomic_set_property(plane, state, |
||
613 | property, val); |
||
614 | } else { |
||
615 | return -EINVAL; |
||
616 | } |
||
617 | |||
618 | return 0; |
||
619 | } |
||
620 | EXPORT_SYMBOL(drm_atomic_plane_set_property); |
||
621 | |||
622 | /* |
||
623 | * This function handles generic/core properties and calls out to |
||
624 | * driver's ->atomic_get_property() for driver properties. To ensure |
||
625 | * consistent behavior you must call this function rather than the |
||
626 | * driver hook directly. |
||
627 | */ |
||
628 | static int |
||
629 | drm_atomic_plane_get_property(struct drm_plane *plane, |
||
630 | const struct drm_plane_state *state, |
||
631 | struct drm_property *property, uint64_t *val) |
||
632 | { |
||
633 | struct drm_device *dev = plane->dev; |
||
634 | struct drm_mode_config *config = &dev->mode_config; |
||
635 | |||
636 | if (property == config->prop_fb_id) { |
||
637 | *val = (state->fb) ? state->fb->base.id : 0; |
||
638 | } else if (property == config->prop_crtc_id) { |
||
639 | *val = (state->crtc) ? state->crtc->base.id : 0; |
||
640 | } else if (property == config->prop_crtc_x) { |
||
641 | *val = I642U64(state->crtc_x); |
||
642 | } else if (property == config->prop_crtc_y) { |
||
643 | *val = I642U64(state->crtc_y); |
||
644 | } else if (property == config->prop_crtc_w) { |
||
645 | *val = state->crtc_w; |
||
646 | } else if (property == config->prop_crtc_h) { |
||
647 | *val = state->crtc_h; |
||
648 | } else if (property == config->prop_src_x) { |
||
649 | *val = state->src_x; |
||
650 | } else if (property == config->prop_src_y) { |
||
651 | *val = state->src_y; |
||
652 | } else if (property == config->prop_src_w) { |
||
653 | *val = state->src_w; |
||
654 | } else if (property == config->prop_src_h) { |
||
655 | *val = state->src_h; |
||
656 | } else if (property == config->rotation_property) { |
||
657 | *val = state->rotation; |
||
658 | } else if (plane->funcs->atomic_get_property) { |
||
659 | return plane->funcs->atomic_get_property(plane, state, property, val); |
||
660 | } else { |
||
661 | return -EINVAL; |
||
662 | } |
||
663 | |||
664 | return 0; |
||
665 | } |
||
666 | |||
667 | static bool |
||
668 | plane_switching_crtc(struct drm_atomic_state *state, |
||
669 | struct drm_plane *plane, |
||
670 | struct drm_plane_state *plane_state) |
||
671 | { |
||
672 | if (!plane->state->crtc || !plane_state->crtc) |
||
673 | return false; |
||
674 | |||
675 | if (plane->state->crtc == plane_state->crtc) |
||
676 | return false; |
||
677 | |||
678 | /* This could be refined, but currently there's no helper or driver code |
||
679 | * to implement direct switching of active planes nor userspace to take |
||
680 | * advantage of more direct plane switching without the intermediate |
||
681 | * full OFF state. |
||
682 | */ |
||
683 | return true; |
||
684 | } |
||
685 | |||
686 | /** |
||
687 | * drm_atomic_plane_check - check plane state |
||
688 | * @plane: plane to check |
||
689 | * @state: plane state to check |
||
690 | * |
||
691 | * Provides core sanity checks for plane state. |
||
692 | * |
||
693 | * RETURNS: |
||
694 | * Zero on success, error code on failure |
||
695 | */ |
||
696 | static int drm_atomic_plane_check(struct drm_plane *plane, |
||
697 | struct drm_plane_state *state) |
||
698 | { |
||
699 | unsigned int fb_width, fb_height; |
||
700 | int ret; |
||
701 | |||
702 | /* either *both* CRTC and FB must be set, or neither */ |
||
703 | if (WARN_ON(state->crtc && !state->fb)) { |
||
704 | DRM_DEBUG_ATOMIC("CRTC set but no FB\n"); |
||
705 | return -EINVAL; |
||
706 | } else if (WARN_ON(state->fb && !state->crtc)) { |
||
707 | DRM_DEBUG_ATOMIC("FB set but no CRTC\n"); |
||
708 | return -EINVAL; |
||
709 | } |
||
710 | |||
711 | /* if disabled, we don't care about the rest of the state: */ |
||
712 | if (!state->crtc) |
||
713 | return 0; |
||
714 | |||
715 | /* Check whether this plane is usable on this CRTC */ |
||
716 | if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) { |
||
717 | DRM_DEBUG_ATOMIC("Invalid crtc for plane\n"); |
||
718 | return -EINVAL; |
||
719 | } |
||
720 | |||
721 | /* Check whether this plane supports the fb pixel format. */ |
||
722 | ret = drm_plane_check_pixel_format(plane, state->fb->pixel_format); |
||
723 | if (ret) { |
||
724 | DRM_DEBUG_ATOMIC("Invalid pixel format %s\n", |
||
725 | drm_get_format_name(state->fb->pixel_format)); |
||
726 | return ret; |
||
727 | } |
||
728 | |||
729 | /* Give drivers some help against integer overflows */ |
||
730 | if (state->crtc_w > INT_MAX || |
||
731 | state->crtc_x > INT_MAX - (int32_t) state->crtc_w || |
||
732 | state->crtc_h > INT_MAX || |
||
733 | state->crtc_y > INT_MAX - (int32_t) state->crtc_h) { |
||
734 | DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n", |
||
735 | state->crtc_w, state->crtc_h, |
||
736 | state->crtc_x, state->crtc_y); |
||
737 | return -ERANGE; |
||
738 | } |
||
739 | |||
740 | fb_width = state->fb->width << 16; |
||
741 | fb_height = state->fb->height << 16; |
||
742 | |||
743 | /* Make sure source coordinates are inside the fb. */ |
||
744 | if (state->src_w > fb_width || |
||
745 | state->src_x > fb_width - state->src_w || |
||
746 | state->src_h > fb_height || |
||
747 | state->src_y > fb_height - state->src_h) { |
||
748 | DRM_DEBUG_ATOMIC("Invalid source coordinates " |
||
749 | "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", |
||
750 | state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10, |
||
751 | state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10, |
||
752 | state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10, |
||
753 | state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10); |
||
754 | return -ENOSPC; |
||
755 | } |
||
756 | |||
757 | if (plane_switching_crtc(state->state, plane, state)) { |
||
758 | DRM_DEBUG_ATOMIC("[PLANE:%d] switching CRTC directly\n", |
||
759 | plane->base.id); |
||
760 | return -EINVAL; |
||
761 | } |
||
762 | |||
763 | return 0; |
||
764 | } |
||
765 | |||
766 | /** |
||
5271 | serge | 767 | * drm_atomic_get_connector_state - get connector state |
768 | * @state: global atomic state object |
||
769 | * @connector: connector to get state object for |
||
770 | * |
||
771 | * This function returns the connector state for the given connector, |
||
772 | * allocating it if needed. It will also grab the relevant connector lock to |
||
773 | * make sure that the state is consistent. |
||
774 | * |
||
775 | * Returns: |
||
776 | * |
||
777 | * Either the allocated state or the error code encoded into the pointer. When |
||
778 | * the error is EDEADLK then the w/w mutex code has detected a deadlock and the |
||
779 | * entire atomic sequence must be restarted. All other errors are fatal. |
||
780 | */ |
||
781 | struct drm_connector_state * |
||
782 | drm_atomic_get_connector_state(struct drm_atomic_state *state, |
||
783 | struct drm_connector *connector) |
||
784 | { |
||
785 | int ret, index; |
||
786 | struct drm_mode_config *config = &connector->dev->mode_config; |
||
787 | struct drm_connector_state *connector_state; |
||
788 | |||
789 | ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); |
||
790 | if (ret) |
||
791 | return ERR_PTR(ret); |
||
792 | |||
793 | index = drm_connector_index(connector); |
||
794 | |||
795 | /* |
||
796 | * Construction of atomic state updates can race with a connector |
||
797 | * hot-add which might overflow. In this case flip the table and just |
||
798 | * restart the entire ioctl - no one is fast enough to livelock a cpu |
||
799 | * with physical hotplug events anyway. |
||
800 | * |
||
801 | * Note that we only grab the indexes once we have the right lock to |
||
802 | * prevent hotplug/unplugging of connectors. So removal is no problem, |
||
803 | * at most the array is a bit too large. |
||
804 | */ |
||
805 | if (index >= state->num_connector) { |
||
6084 | serge | 806 | DRM_DEBUG_ATOMIC("Hot-added connector would overflow state array, restarting\n"); |
5271 | serge | 807 | return ERR_PTR(-EAGAIN); |
808 | } |
||
809 | |||
810 | if (state->connector_states[index]) |
||
811 | return state->connector_states[index]; |
||
812 | |||
813 | connector_state = connector->funcs->atomic_duplicate_state(connector); |
||
814 | if (!connector_state) |
||
815 | return ERR_PTR(-ENOMEM); |
||
816 | |||
817 | state->connector_states[index] = connector_state; |
||
818 | state->connectors[index] = connector; |
||
819 | connector_state->state = state; |
||
820 | |||
6084 | serge | 821 | DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d] %p state to %p\n", |
822 | connector->base.id, connector_state, state); |
||
5271 | serge | 823 | |
824 | if (connector_state->crtc) { |
||
825 | struct drm_crtc_state *crtc_state; |
||
826 | |||
827 | crtc_state = drm_atomic_get_crtc_state(state, |
||
828 | connector_state->crtc); |
||
829 | if (IS_ERR(crtc_state)) |
||
830 | return ERR_CAST(crtc_state); |
||
831 | } |
||
832 | |||
833 | return connector_state; |
||
834 | } |
||
835 | EXPORT_SYMBOL(drm_atomic_get_connector_state); |
||
836 | |||
837 | /** |
||
6084 | serge | 838 | * drm_atomic_connector_set_property - set property on connector. |
839 | * @connector: the drm connector to set a property on |
||
840 | * @state: the state object to update with the new property value |
||
841 | * @property: the property to set |
||
842 | * @val: the new property value |
||
843 | * |
||
844 | * Use this instead of calling connector->atomic_set_property directly. |
||
845 | * This function handles generic/core properties and calls out to |
||
846 | * driver's ->atomic_set_property() for driver properties. To ensure |
||
847 | * consistent behavior you must call this function rather than the |
||
848 | * driver hook directly. |
||
849 | * |
||
850 | * RETURNS: |
||
851 | * Zero on success, error code on failure |
||
852 | */ |
||
853 | int drm_atomic_connector_set_property(struct drm_connector *connector, |
||
854 | struct drm_connector_state *state, struct drm_property *property, |
||
855 | uint64_t val) |
||
856 | { |
||
857 | struct drm_device *dev = connector->dev; |
||
858 | struct drm_mode_config *config = &dev->mode_config; |
||
859 | |||
860 | if (property == config->prop_crtc_id) { |
||
861 | struct drm_crtc *crtc = drm_crtc_find(dev, val); |
||
862 | return drm_atomic_set_crtc_for_connector(state, crtc); |
||
863 | } else if (property == config->dpms_property) { |
||
864 | /* setting DPMS property requires special handling, which |
||
865 | * is done in legacy setprop path for us. Disallow (for |
||
866 | * now?) atomic writes to DPMS property: |
||
867 | */ |
||
868 | return -EINVAL; |
||
869 | } else if (connector->funcs->atomic_set_property) { |
||
870 | return connector->funcs->atomic_set_property(connector, |
||
871 | state, property, val); |
||
872 | } else { |
||
873 | return -EINVAL; |
||
874 | } |
||
875 | } |
||
876 | EXPORT_SYMBOL(drm_atomic_connector_set_property); |
||
877 | |||
878 | /* |
||
879 | * This function handles generic/core properties and calls out to |
||
880 | * driver's ->atomic_get_property() for driver properties. To ensure |
||
881 | * consistent behavior you must call this function rather than the |
||
882 | * driver hook directly. |
||
883 | */ |
||
884 | static int |
||
885 | drm_atomic_connector_get_property(struct drm_connector *connector, |
||
886 | const struct drm_connector_state *state, |
||
887 | struct drm_property *property, uint64_t *val) |
||
888 | { |
||
889 | struct drm_device *dev = connector->dev; |
||
890 | struct drm_mode_config *config = &dev->mode_config; |
||
891 | |||
892 | if (property == config->prop_crtc_id) { |
||
893 | *val = (state->crtc) ? state->crtc->base.id : 0; |
||
894 | } else if (property == config->dpms_property) { |
||
895 | *val = connector->dpms; |
||
896 | } else if (connector->funcs->atomic_get_property) { |
||
897 | return connector->funcs->atomic_get_property(connector, |
||
898 | state, property, val); |
||
899 | } else { |
||
900 | return -EINVAL; |
||
901 | } |
||
902 | |||
903 | return 0; |
||
904 | } |
||
905 | |||
906 | int drm_atomic_get_property(struct drm_mode_object *obj, |
||
907 | struct drm_property *property, uint64_t *val) |
||
908 | { |
||
909 | struct drm_device *dev = property->dev; |
||
910 | int ret; |
||
911 | |||
912 | switch (obj->type) { |
||
913 | case DRM_MODE_OBJECT_CONNECTOR: { |
||
914 | struct drm_connector *connector = obj_to_connector(obj); |
||
915 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
||
916 | ret = drm_atomic_connector_get_property(connector, |
||
917 | connector->state, property, val); |
||
918 | break; |
||
919 | } |
||
920 | case DRM_MODE_OBJECT_CRTC: { |
||
921 | struct drm_crtc *crtc = obj_to_crtc(obj); |
||
922 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); |
||
923 | ret = drm_atomic_crtc_get_property(crtc, |
||
924 | crtc->state, property, val); |
||
925 | break; |
||
926 | } |
||
927 | case DRM_MODE_OBJECT_PLANE: { |
||
928 | struct drm_plane *plane = obj_to_plane(obj); |
||
929 | WARN_ON(!drm_modeset_is_locked(&plane->mutex)); |
||
930 | ret = drm_atomic_plane_get_property(plane, |
||
931 | plane->state, property, val); |
||
932 | break; |
||
933 | } |
||
934 | default: |
||
935 | ret = -EINVAL; |
||
936 | break; |
||
937 | } |
||
938 | |||
939 | return ret; |
||
940 | } |
||
941 | |||
942 | /** |
||
5271 | serge | 943 | * drm_atomic_set_crtc_for_plane - set crtc for plane |
6084 | serge | 944 | * @plane_state: the plane whose incoming state to update |
5271 | serge | 945 | * @crtc: crtc to use for the plane |
946 | * |
||
947 | * Changing the assigned crtc for a plane requires us to grab the lock and state |
||
948 | * for the new crtc, as needed. This function takes care of all these details |
||
949 | * besides updating the pointer in the state object itself. |
||
950 | * |
||
951 | * Returns: |
||
952 | * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK |
||
953 | * then the w/w mutex code has detected a deadlock and the entire atomic |
||
954 | * sequence must be restarted. All other errors are fatal. |
||
955 | */ |
||
956 | int |
||
6084 | serge | 957 | drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, |
958 | struct drm_crtc *crtc) |
||
5271 | serge | 959 | { |
6084 | serge | 960 | struct drm_plane *plane = plane_state->plane; |
5271 | serge | 961 | struct drm_crtc_state *crtc_state; |
962 | |||
963 | if (plane_state->crtc) { |
||
964 | crtc_state = drm_atomic_get_crtc_state(plane_state->state, |
||
965 | plane_state->crtc); |
||
966 | if (WARN_ON(IS_ERR(crtc_state))) |
||
967 | return PTR_ERR(crtc_state); |
||
968 | |||
969 | crtc_state->plane_mask &= ~(1 << drm_plane_index(plane)); |
||
970 | } |
||
971 | |||
972 | plane_state->crtc = crtc; |
||
973 | |||
974 | if (crtc) { |
||
975 | crtc_state = drm_atomic_get_crtc_state(plane_state->state, |
||
976 | crtc); |
||
977 | if (IS_ERR(crtc_state)) |
||
978 | return PTR_ERR(crtc_state); |
||
979 | crtc_state->plane_mask |= (1 << drm_plane_index(plane)); |
||
980 | } |
||
981 | |||
982 | if (crtc) |
||
6084 | serge | 983 | DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d]\n", |
984 | plane_state, crtc->base.id); |
||
5271 | serge | 985 | else |
6084 | serge | 986 | DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n", |
987 | plane_state); |
||
5271 | serge | 988 | |
989 | return 0; |
||
990 | } |
||
991 | EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane); |
||
992 | |||
993 | /** |
||
6084 | serge | 994 | * drm_atomic_set_fb_for_plane - set framebuffer for plane |
5271 | serge | 995 | * @plane_state: atomic state object for the plane |
996 | * @fb: fb to use for the plane |
||
997 | * |
||
998 | * Changing the assigned framebuffer for a plane requires us to grab a reference |
||
999 | * to the new fb and drop the reference to the old fb, if there is one. This |
||
1000 | * function takes care of all these details besides updating the pointer in the |
||
1001 | * state object itself. |
||
1002 | */ |
||
1003 | void |
||
1004 | drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, |
||
1005 | struct drm_framebuffer *fb) |
||
1006 | { |
||
1007 | if (plane_state->fb) |
||
1008 | drm_framebuffer_unreference(plane_state->fb); |
||
1009 | if (fb) |
||
1010 | drm_framebuffer_reference(fb); |
||
1011 | plane_state->fb = fb; |
||
1012 | |||
1013 | if (fb) |
||
6084 | serge | 1014 | DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n", |
1015 | fb->base.id, plane_state); |
||
5271 | serge | 1016 | else |
6084 | serge | 1017 | DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n", |
1018 | plane_state); |
||
5271 | serge | 1019 | } |
1020 | EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); |
||
1021 | |||
1022 | /** |
||
1023 | * drm_atomic_set_crtc_for_connector - set crtc for connector |
||
1024 | * @conn_state: atomic state object for the connector |
||
1025 | * @crtc: crtc to use for the connector |
||
1026 | * |
||
1027 | * Changing the assigned crtc for a connector requires us to grab the lock and |
||
1028 | * state for the new crtc, as needed. This function takes care of all these |
||
1029 | * details besides updating the pointer in the state object itself. |
||
1030 | * |
||
1031 | * Returns: |
||
1032 | * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK |
||
1033 | * then the w/w mutex code has detected a deadlock and the entire atomic |
||
1034 | * sequence must be restarted. All other errors are fatal. |
||
1035 | */ |
||
1036 | int |
||
1037 | drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, |
||
1038 | struct drm_crtc *crtc) |
||
1039 | { |
||
1040 | struct drm_crtc_state *crtc_state; |
||
1041 | |||
1042 | if (crtc) { |
||
1043 | crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc); |
||
1044 | if (IS_ERR(crtc_state)) |
||
1045 | return PTR_ERR(crtc_state); |
||
1046 | } |
||
1047 | |||
1048 | conn_state->crtc = crtc; |
||
1049 | |||
1050 | if (crtc) |
||
6084 | serge | 1051 | DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d]\n", |
1052 | conn_state, crtc->base.id); |
||
5271 | serge | 1053 | else |
6084 | serge | 1054 | DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n", |
1055 | conn_state); |
||
5271 | serge | 1056 | |
1057 | return 0; |
||
1058 | } |
||
1059 | EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); |
||
1060 | |||
1061 | /** |
||
1062 | * drm_atomic_add_affected_connectors - add connectors for crtc |
||
1063 | * @state: atomic state |
||
1064 | * @crtc: DRM crtc |
||
1065 | * |
||
1066 | * This function walks the current configuration and adds all connectors |
||
1067 | * currently using @crtc to the atomic configuration @state. Note that this |
||
1068 | * function must acquire the connection mutex. This can potentially cause |
||
1069 | * unneeded seralization if the update is just for the planes on one crtc. Hence |
||
1070 | * drivers and helpers should only call this when really needed (e.g. when a |
||
1071 | * full modeset needs to happen due to some change). |
||
1072 | * |
||
1073 | * Returns: |
||
1074 | * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK |
||
1075 | * then the w/w mutex code has detected a deadlock and the entire atomic |
||
1076 | * sequence must be restarted. All other errors are fatal. |
||
1077 | */ |
||
1078 | int |
||
1079 | drm_atomic_add_affected_connectors(struct drm_atomic_state *state, |
||
1080 | struct drm_crtc *crtc) |
||
1081 | { |
||
1082 | struct drm_mode_config *config = &state->dev->mode_config; |
||
1083 | struct drm_connector *connector; |
||
1084 | struct drm_connector_state *conn_state; |
||
1085 | int ret; |
||
1086 | |||
1087 | ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); |
||
1088 | if (ret) |
||
1089 | return ret; |
||
1090 | |||
6084 | serge | 1091 | DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d] to %p\n", |
1092 | crtc->base.id, state); |
||
5271 | serge | 1093 | |
1094 | /* |
||
1095 | * Changed connectors are already in @state, so only need to look at the |
||
1096 | * current configuration. |
||
1097 | */ |
||
6084 | serge | 1098 | drm_for_each_connector(connector, state->dev) { |
5271 | serge | 1099 | if (connector->state->crtc != crtc) |
1100 | continue; |
||
1101 | |||
1102 | conn_state = drm_atomic_get_connector_state(state, connector); |
||
1103 | if (IS_ERR(conn_state)) |
||
1104 | return PTR_ERR(conn_state); |
||
1105 | } |
||
1106 | |||
1107 | return 0; |
||
1108 | } |
||
1109 | EXPORT_SYMBOL(drm_atomic_add_affected_connectors); |
||
1110 | |||
1111 | /** |
||
6084 | serge | 1112 | * drm_atomic_add_affected_planes - add planes for crtc |
1113 | * @state: atomic state |
||
1114 | * @crtc: DRM crtc |
||
1115 | * |
||
1116 | * This function walks the current configuration and adds all planes |
||
1117 | * currently used by @crtc to the atomic configuration @state. This is useful |
||
1118 | * when an atomic commit also needs to check all currently enabled plane on |
||
1119 | * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC |
||
1120 | * to avoid special code to force-enable all planes. |
||
1121 | * |
||
1122 | * Since acquiring a plane state will always also acquire the w/w mutex of the |
||
1123 | * current CRTC for that plane (if there is any) adding all the plane states for |
||
1124 | * a CRTC will not reduce parallism of atomic updates. |
||
1125 | * |
||
1126 | * Returns: |
||
1127 | * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK |
||
1128 | * then the w/w mutex code has detected a deadlock and the entire atomic |
||
1129 | * sequence must be restarted. All other errors are fatal. |
||
1130 | */ |
||
1131 | int |
||
1132 | drm_atomic_add_affected_planes(struct drm_atomic_state *state, |
||
1133 | struct drm_crtc *crtc) |
||
1134 | { |
||
1135 | struct drm_plane *plane; |
||
1136 | |||
1137 | WARN_ON(!drm_atomic_get_existing_crtc_state(state, crtc)); |
||
1138 | |||
1139 | drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) { |
||
1140 | struct drm_plane_state *plane_state = |
||
1141 | drm_atomic_get_plane_state(state, plane); |
||
1142 | |||
1143 | if (IS_ERR(plane_state)) |
||
1144 | return PTR_ERR(plane_state); |
||
1145 | } |
||
1146 | return 0; |
||
1147 | } |
||
1148 | EXPORT_SYMBOL(drm_atomic_add_affected_planes); |
||
1149 | |||
1150 | /** |
||
5271 | serge | 1151 | * drm_atomic_connectors_for_crtc - count number of connected outputs |
1152 | * @state: atomic state |
||
1153 | * @crtc: DRM crtc |
||
1154 | * |
||
1155 | * This function counts all connectors which will be connected to @crtc |
||
1156 | * according to @state. Useful to recompute the enable state for @crtc. |
||
1157 | */ |
||
1158 | int |
||
1159 | drm_atomic_connectors_for_crtc(struct drm_atomic_state *state, |
||
1160 | struct drm_crtc *crtc) |
||
1161 | { |
||
6084 | serge | 1162 | struct drm_connector *connector; |
1163 | struct drm_connector_state *conn_state; |
||
1164 | |||
5271 | serge | 1165 | int i, num_connected_connectors = 0; |
1166 | |||
6084 | serge | 1167 | for_each_connector_in_state(state, connector, conn_state, i) { |
1168 | if (conn_state->crtc == crtc) |
||
5271 | serge | 1169 | num_connected_connectors++; |
1170 | } |
||
1171 | |||
6084 | serge | 1172 | DRM_DEBUG_ATOMIC("State %p has %i connectors for [CRTC:%d]\n", |
1173 | state, num_connected_connectors, crtc->base.id); |
||
5271 | serge | 1174 | |
1175 | return num_connected_connectors; |
||
1176 | } |
||
1177 | EXPORT_SYMBOL(drm_atomic_connectors_for_crtc); |
||
1178 | |||
1179 | /** |
||
1180 | * drm_atomic_legacy_backoff - locking backoff for legacy ioctls |
||
1181 | * @state: atomic state |
||
1182 | * |
||
1183 | * This function should be used by legacy entry points which don't understand |
||
1184 | * -EDEADLK semantics. For simplicity this one will grab all modeset locks after |
||
6084 | serge | 1185 | * the slowpath completed. |
5271 | serge | 1186 | */ |
1187 | void drm_atomic_legacy_backoff(struct drm_atomic_state *state) |
||
1188 | { |
||
1189 | int ret; |
||
1190 | |||
1191 | retry: |
||
1192 | drm_modeset_backoff(state->acquire_ctx); |
||
1193 | |||
1194 | ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex, |
||
1195 | state->acquire_ctx); |
||
1196 | if (ret) |
||
1197 | goto retry; |
||
1198 | ret = drm_modeset_lock_all_crtcs(state->dev, |
||
1199 | state->acquire_ctx); |
||
1200 | if (ret) |
||
1201 | goto retry; |
||
1202 | } |
||
1203 | EXPORT_SYMBOL(drm_atomic_legacy_backoff); |
||
1204 | |||
1205 | /** |
||
1206 | * drm_atomic_check_only - check whether a given config would work |
||
1207 | * @state: atomic configuration to check |
||
1208 | * |
||
1209 | * Note that this function can return -EDEADLK if the driver needed to acquire |
||
1210 | * more locks but encountered a deadlock. The caller must then do the usual w/w |
||
1211 | * backoff dance and restart. All other errors are fatal. |
||
1212 | * |
||
1213 | * Returns: |
||
1214 | * 0 on success, negative error code on failure. |
||
1215 | */ |
||
1216 | int drm_atomic_check_only(struct drm_atomic_state *state) |
||
1217 | { |
||
6084 | serge | 1218 | struct drm_device *dev = state->dev; |
1219 | struct drm_mode_config *config = &dev->mode_config; |
||
1220 | struct drm_plane *plane; |
||
1221 | struct drm_plane_state *plane_state; |
||
1222 | struct drm_crtc *crtc; |
||
1223 | struct drm_crtc_state *crtc_state; |
||
1224 | int i, ret = 0; |
||
5271 | serge | 1225 | |
6084 | serge | 1226 | DRM_DEBUG_ATOMIC("checking %p\n", state); |
5271 | serge | 1227 | |
6084 | serge | 1228 | for_each_plane_in_state(state, plane, plane_state, i) { |
1229 | ret = drm_atomic_plane_check(plane, plane_state); |
||
1230 | if (ret) { |
||
1231 | DRM_DEBUG_ATOMIC("[PLANE:%d] atomic core check failed\n", |
||
1232 | plane->base.id); |
||
1233 | return ret; |
||
1234 | } |
||
1235 | } |
||
1236 | |||
1237 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
||
1238 | ret = drm_atomic_crtc_check(crtc, crtc_state); |
||
1239 | if (ret) { |
||
1240 | DRM_DEBUG_ATOMIC("[CRTC:%d] atomic core check failed\n", |
||
1241 | crtc->base.id); |
||
1242 | return ret; |
||
1243 | } |
||
1244 | } |
||
1245 | |||
5271 | serge | 1246 | if (config->funcs->atomic_check) |
6084 | serge | 1247 | ret = config->funcs->atomic_check(state->dev, state); |
1248 | |||
1249 | if (!state->allow_modeset) { |
||
1250 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
||
1251 | if (drm_atomic_crtc_needs_modeset(crtc_state)) { |
||
1252 | DRM_DEBUG_ATOMIC("[CRTC:%d] requires full modeset\n", |
||
1253 | crtc->base.id); |
||
1254 | return -EINVAL; |
||
1255 | } |
||
1256 | } |
||
1257 | } |
||
1258 | |||
1259 | return ret; |
||
5271 | serge | 1260 | } |
1261 | EXPORT_SYMBOL(drm_atomic_check_only); |
||
1262 | |||
1263 | /** |
||
1264 | * drm_atomic_commit - commit configuration atomically |
||
1265 | * @state: atomic configuration to check |
||
1266 | * |
||
1267 | * Note that this function can return -EDEADLK if the driver needed to acquire |
||
1268 | * more locks but encountered a deadlock. The caller must then do the usual w/w |
||
1269 | * backoff dance and restart. All other errors are fatal. |
||
1270 | * |
||
1271 | * Also note that on successful execution ownership of @state is transferred |
||
1272 | * from the caller of this function to the function itself. The caller must not |
||
1273 | * free or in any other way access @state. If the function fails then the caller |
||
1274 | * must clean up @state itself. |
||
1275 | * |
||
1276 | * Returns: |
||
1277 | * 0 on success, negative error code on failure. |
||
1278 | */ |
||
1279 | int drm_atomic_commit(struct drm_atomic_state *state) |
||
1280 | { |
||
1281 | struct drm_mode_config *config = &state->dev->mode_config; |
||
1282 | int ret; |
||
1283 | |||
1284 | ret = drm_atomic_check_only(state); |
||
1285 | if (ret) |
||
1286 | return ret; |
||
1287 | |||
6084 | serge | 1288 | DRM_DEBUG_ATOMIC("commiting %p\n", state); |
5271 | serge | 1289 | |
1290 | return config->funcs->atomic_commit(state->dev, state, false); |
||
1291 | } |
||
1292 | EXPORT_SYMBOL(drm_atomic_commit); |
||
1293 | |||
1294 | /** |
||
1295 | * drm_atomic_async_commit - atomic&async configuration commit |
||
1296 | * @state: atomic configuration to check |
||
1297 | * |
||
1298 | * Note that this function can return -EDEADLK if the driver needed to acquire |
||
1299 | * more locks but encountered a deadlock. The caller must then do the usual w/w |
||
1300 | * backoff dance and restart. All other errors are fatal. |
||
1301 | * |
||
1302 | * Also note that on successful execution ownership of @state is transferred |
||
1303 | * from the caller of this function to the function itself. The caller must not |
||
1304 | * free or in any other way access @state. If the function fails then the caller |
||
1305 | * must clean up @state itself. |
||
1306 | * |
||
1307 | * Returns: |
||
1308 | * 0 on success, negative error code on failure. |
||
1309 | */ |
||
1310 | int drm_atomic_async_commit(struct drm_atomic_state *state) |
||
1311 | { |
||
1312 | struct drm_mode_config *config = &state->dev->mode_config; |
||
1313 | int ret; |
||
1314 | |||
1315 | ret = drm_atomic_check_only(state); |
||
1316 | if (ret) |
||
1317 | return ret; |
||
1318 | |||
6084 | serge | 1319 | DRM_DEBUG_ATOMIC("commiting %p asynchronously\n", state); |
5271 | serge | 1320 | |
1321 | return config->funcs->atomic_commit(state->dev, state, true); |
||
1322 | } |
||
1323 | EXPORT_SYMBOL(drm_atomic_async_commit); |
||
1324 | |||
6084 | serge | 1325 | /* |
1326 | * The big monstor ioctl |
||
5271 | serge | 1327 | */ |
6084 | serge | 1328 | |
1329 | static struct drm_pending_vblank_event *create_vblank_event( |
||
1330 | struct drm_device *dev, struct drm_file *file_priv, uint64_t user_data) |
||
5271 | serge | 1331 | { |
6084 | serge | 1332 | struct drm_pending_vblank_event *e = NULL; |
1333 | unsigned long flags; |
||
5271 | serge | 1334 | |
6084 | serge | 1335 | spin_lock_irqsave(&dev->event_lock, flags); |
1336 | if (file_priv->event_space < sizeof e->event) { |
||
1337 | spin_unlock_irqrestore(&dev->event_lock, flags); |
||
1338 | goto out; |
||
1339 | } |
||
1340 | file_priv->event_space -= sizeof e->event; |
||
1341 | spin_unlock_irqrestore(&dev->event_lock, flags); |
||
5271 | serge | 1342 | |
6084 | serge | 1343 | e = kzalloc(sizeof *e, GFP_KERNEL); |
1344 | if (e == NULL) { |
||
1345 | spin_lock_irqsave(&dev->event_lock, flags); |
||
1346 | file_priv->event_space += sizeof e->event; |
||
1347 | spin_unlock_irqrestore(&dev->event_lock, flags); |
||
1348 | goto out; |
||
1349 | } |
||
5271 | serge | 1350 | |
6084 | serge | 1351 | e->event.base.type = DRM_EVENT_FLIP_COMPLETE; |
1352 | e->event.base.length = sizeof e->event; |
||
1353 | e->event.user_data = user_data; |
||
1354 | e->base.event = &e->event.base; |
||
1355 | e->base.file_priv = file_priv; |
||
1356 | e->base.destroy = (void (*) (struct drm_pending_event *)) kfree; |
||
5271 | serge | 1357 | |
6084 | serge | 1358 | out: |
1359 | return e; |
||
5271 | serge | 1360 | } |
1361 | |||
6084 | serge | 1362 | static void destroy_vblank_event(struct drm_device *dev, |
1363 | struct drm_file *file_priv, struct drm_pending_vblank_event *e) |
||
1364 | { |
||
1365 | unsigned long flags; |
||
5271 | serge | 1366 | |
6084 | serge | 1367 | spin_lock_irqsave(&dev->event_lock, flags); |
1368 | file_priv->event_space += sizeof e->event; |
||
1369 | spin_unlock_irqrestore(&dev->event_lock, flags); |
||
1370 | kfree(e); |
||
1371 | } |
||
1372 | |||
1373 | static int atomic_set_prop(struct drm_atomic_state *state, |
||
1374 | struct drm_mode_object *obj, struct drm_property *prop, |
||
1375 | uint64_t prop_value) |
||
5271 | serge | 1376 | { |
6084 | serge | 1377 | struct drm_mode_object *ref; |
1378 | int ret; |
||
1379 | |||
1380 | if (!drm_property_change_valid_get(prop, prop_value, &ref)) |
||
1381 | return -EINVAL; |
||
1382 | |||
1383 | switch (obj->type) { |
||
1384 | case DRM_MODE_OBJECT_CONNECTOR: { |
||
1385 | struct drm_connector *connector = obj_to_connector(obj); |
||
1386 | struct drm_connector_state *connector_state; |
||
1387 | |||
1388 | connector_state = drm_atomic_get_connector_state(state, connector); |
||
1389 | if (IS_ERR(connector_state)) { |
||
1390 | ret = PTR_ERR(connector_state); |
||
1391 | break; |
||
1392 | } |
||
1393 | |||
1394 | ret = drm_atomic_connector_set_property(connector, |
||
1395 | connector_state, prop, prop_value); |
||
1396 | break; |
||
1397 | } |
||
1398 | case DRM_MODE_OBJECT_CRTC: { |
||
1399 | struct drm_crtc *crtc = obj_to_crtc(obj); |
||
1400 | struct drm_crtc_state *crtc_state; |
||
1401 | |||
1402 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
||
1403 | if (IS_ERR(crtc_state)) { |
||
1404 | ret = PTR_ERR(crtc_state); |
||
1405 | break; |
||
1406 | } |
||
1407 | |||
1408 | ret = drm_atomic_crtc_set_property(crtc, |
||
1409 | crtc_state, prop, prop_value); |
||
1410 | break; |
||
1411 | } |
||
1412 | case DRM_MODE_OBJECT_PLANE: { |
||
1413 | struct drm_plane *plane = obj_to_plane(obj); |
||
1414 | struct drm_plane_state *plane_state; |
||
1415 | |||
1416 | plane_state = drm_atomic_get_plane_state(state, plane); |
||
1417 | if (IS_ERR(plane_state)) { |
||
1418 | ret = PTR_ERR(plane_state); |
||
1419 | break; |
||
1420 | } |
||
1421 | |||
1422 | ret = drm_atomic_plane_set_property(plane, |
||
1423 | plane_state, prop, prop_value); |
||
1424 | break; |
||
1425 | } |
||
1426 | default: |
||
1427 | ret = -EINVAL; |
||
1428 | break; |
||
1429 | } |
||
1430 | |||
1431 | drm_property_change_valid_put(prop, ref); |
||
1432 | return ret; |
||
5271 | serge | 1433 | } |
1434 | |||
1435 | /** |
||
6084 | serge | 1436 | * drm_atomic_update_old_fb -- Unset old_fb pointers and set plane->fb pointers. |
5271 | serge | 1437 | * |
6084 | serge | 1438 | * @dev: drm device to check. |
1439 | * @plane_mask: plane mask for planes that were updated. |
||
1440 | * @ret: return value, can be -EDEADLK for a retry. |
||
1441 | * |
||
1442 | * Before doing an update plane->old_fb is set to plane->fb, |
||
1443 | * but before dropping the locks old_fb needs to be set to NULL |
||
1444 | * and plane->fb updated. This is a common operation for each |
||
1445 | * atomic update, so this call is split off as a helper. |
||
5271 | serge | 1446 | */ |
6084 | serge | 1447 | void drm_atomic_clean_old_fb(struct drm_device *dev, |
1448 | unsigned plane_mask, |
||
1449 | int ret) |
||
5271 | serge | 1450 | { |
6084 | serge | 1451 | struct drm_plane *plane; |
5271 | serge | 1452 | |
6084 | serge | 1453 | /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping |
1454 | * locks (ie. while it is still safe to deref plane->state). We |
||
1455 | * need to do this here because the driver entry points cannot |
||
1456 | * distinguish between legacy and atomic ioctls. |
||
1457 | */ |
||
1458 | drm_for_each_plane_mask(plane, dev, plane_mask) { |
||
1459 | if (ret == 0) { |
||
1460 | struct drm_framebuffer *new_fb = plane->state->fb; |
||
1461 | if (new_fb) |
||
1462 | drm_framebuffer_reference(new_fb); |
||
1463 | plane->fb = new_fb; |
||
1464 | plane->crtc = plane->state->crtc; |
||
1465 | |||
1466 | if (plane->old_fb) |
||
1467 | drm_framebuffer_unreference(plane->old_fb); |
||
1468 | } |
||
1469 | plane->old_fb = NULL; |
||
1470 | } |
||
5271 | serge | 1471 | } |
6084 | serge | 1472 | EXPORT_SYMBOL(drm_atomic_clean_old_fb);>><>><>><>><>>>>> |