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1123 | serge | 1 | /* |
2 | * Copyright (c) 2006-2008 Intel Corporation |
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3 | * Copyright (c) 2007 Dave Airlie |
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4 | * |
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5 | * DRM core CRTC related functions |
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6 | * |
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7 | * Permission to use, copy, modify, distribute, and sell this software and its |
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8 | * documentation for any purpose is hereby granted without fee, provided that |
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9 | * the above copyright notice appear in all copies and that both that copyright |
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10 | * notice and this permission notice appear in supporting documentation, and |
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11 | * that the name of the copyright holders not be used in advertising or |
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12 | * publicity pertaining to distribution of the software without specific, |
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13 | * written prior permission. The copyright holders make no representations |
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14 | * about the suitability of this software for any purpose. It is provided "as |
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15 | * is" without express or implied warranty. |
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16 | * |
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17 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
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18 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
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19 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
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20 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
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21 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
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22 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
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23 | * OF THIS SOFTWARE. |
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24 | * |
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25 | * Authors: |
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26 | * Keith Packard |
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27 | * Eric Anholt |
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28 | * Dave Airlie |
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29 | * Jesse Barnes |
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30 | */ |
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31 | |||
5060 | serge | 32 | #include |
3031 | serge | 33 | #include |
34 | #include |
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1123 | serge | 35 | |
3031 | serge | 36 | #include |
5271 | serge | 37 | #include |
3031 | serge | 38 | #include |
39 | #include |
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40 | #include |
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41 | #include |
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5271 | serge | 42 | #include |
43 | #include |
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3031 | serge | 44 | #include |
45 | |||
5271 | serge | 46 | /** |
47 | * DOC: overview |
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48 | * |
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49 | * The CRTC modeset helper library provides a default set_config implementation |
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50 | * in drm_crtc_helper_set_config(). Plus a few other convenience functions using |
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51 | * the same callbacks which drivers can use to e.g. restore the modeset |
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52 | * configuration on resume with drm_helper_resume_force_mode(). |
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53 | * |
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54 | * The driver callbacks are mostly compatible with the atomic modeset helpers, |
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55 | * except for the handling of the primary plane: Atomic helpers require that the |
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56 | * primary plane is implemented as a real standalone plane and not directly tied |
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57 | * to the CRTC state. For easier transition this library provides functions to |
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58 | * implement the old semantics required by the CRTC helpers using the new plane |
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59 | * and atomic helper callbacks. |
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60 | * |
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61 | * Drivers are strongly urged to convert to the atomic helpers (by way of first |
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62 | * converting to the plane helpers). New drivers must not use these functions |
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63 | * but need to implement the atomic interface instead, potentially using the |
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64 | * atomic helpers for that. |
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65 | */ |
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4560 | Serge | 66 | MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
67 | MODULE_DESCRIPTION("DRM KMS helper"); |
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68 | MODULE_LICENSE("GPL and additional rights"); |
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69 | |||
3192 | Serge | 70 | /** |
71 | * drm_helper_move_panel_connectors_to_head() - move panels to the front in the |
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72 | * connector list |
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73 | * @dev: drm device to operate on |
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74 | * |
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75 | * Some userspace presumes that the first connected connector is the main |
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76 | * display, where it's supposed to display e.g. the login screen. For |
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77 | * laptops, this should be the main panel. Use this function to sort all |
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78 | * (eDP/LVDS) panels to the front of the connector list, instead of |
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79 | * painstakingly trying to initialize them in the right order. |
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80 | */ |
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81 | void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) |
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82 | { |
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83 | struct drm_connector *connector, *tmp; |
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84 | struct list_head panel_list; |
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85 | |||
86 | INIT_LIST_HEAD(&panel_list); |
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87 | |||
88 | list_for_each_entry_safe(connector, tmp, |
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89 | &dev->mode_config.connector_list, head) { |
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90 | if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || |
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91 | connector->connector_type == DRM_MODE_CONNECTOR_eDP) |
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92 | list_move_tail(&connector->head, &panel_list); |
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93 | } |
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94 | |||
95 | list_splice(&panel_list, &dev->mode_config.connector_list); |
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96 | } |
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97 | EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); |
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98 | |||
1123 | serge | 99 | /** |
100 | * drm_helper_encoder_in_use - check if a given encoder is in use |
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101 | * @encoder: encoder to check |
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102 | * |
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5060 | serge | 103 | * Checks whether @encoder is with the current mode setting output configuration |
104 | * in use by any connector. This doesn't mean that it is actually enabled since |
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105 | * the DPMS state is tracked separately. |
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1123 | serge | 106 | * |
5060 | serge | 107 | * Returns: |
108 | * True if @encoder is used, false otherwise. |
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1123 | serge | 109 | */ |
110 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) |
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111 | { |
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112 | struct drm_connector *connector; |
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113 | struct drm_device *dev = encoder->dev; |
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6084 | serge | 114 | |
115 | /* |
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116 | * We can expect this mutex to be locked if we are not panicking. |
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117 | * Locking is currently fubar in the panic handler. |
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118 | */ |
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119 | if (!oops_in_progress) { |
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120 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
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121 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
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122 | } |
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123 | |||
124 | drm_for_each_connector(connector, dev) |
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1123 | serge | 125 | if (connector->encoder == encoder) |
126 | return true; |
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127 | return false; |
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128 | } |
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129 | EXPORT_SYMBOL(drm_helper_encoder_in_use); |
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130 | |||
131 | /** |
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132 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config |
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133 | * @crtc: CRTC to check |
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134 | * |
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5060 | serge | 135 | * Checks whether @crtc is with the current mode setting output configuration |
136 | * in use by any connector. This doesn't mean that it is actually enabled since |
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137 | * the DPMS state is tracked separately. |
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1123 | serge | 138 | * |
5060 | serge | 139 | * Returns: |
140 | * True if @crtc is used, false otherwise. |
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1123 | serge | 141 | */ |
142 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) |
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143 | { |
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144 | struct drm_encoder *encoder; |
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145 | struct drm_device *dev = crtc->dev; |
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6084 | serge | 146 | |
147 | /* |
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148 | * We can expect this mutex to be locked if we are not panicking. |
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149 | * Locking is currently fubar in the panic handler. |
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150 | */ |
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151 | if (!oops_in_progress) |
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152 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
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153 | |||
154 | drm_for_each_encoder(encoder, dev) |
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1123 | serge | 155 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
156 | return true; |
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157 | return false; |
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158 | } |
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159 | EXPORT_SYMBOL(drm_helper_crtc_in_use); |
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160 | |||
1963 | serge | 161 | static void |
162 | drm_encoder_disable(struct drm_encoder *encoder) |
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163 | { |
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6084 | serge | 164 | const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
1963 | serge | 165 | |
6084 | serge | 166 | drm_bridge_disable(encoder->bridge); |
4104 | Serge | 167 | |
1963 | serge | 168 | if (encoder_funcs->disable) |
169 | (*encoder_funcs->disable)(encoder); |
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170 | else |
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171 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
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4104 | Serge | 172 | |
6084 | serge | 173 | drm_bridge_post_disable(encoder->bridge); |
1963 | serge | 174 | } |
175 | |||
5060 | serge | 176 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
1123 | serge | 177 | { |
178 | struct drm_encoder *encoder; |
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179 | struct drm_crtc *crtc; |
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180 | |||
5060 | serge | 181 | drm_warn_on_modeset_not_all_locked(dev); |
1179 | serge | 182 | |
6084 | serge | 183 | drm_for_each_encoder(encoder, dev) { |
1179 | serge | 184 | if (!drm_helper_encoder_in_use(encoder)) { |
1963 | serge | 185 | drm_encoder_disable(encoder); |
5060 | serge | 186 | /* disconnect encoder from any connector */ |
1179 | serge | 187 | encoder->crtc = NULL; |
188 | } |
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1123 | serge | 189 | } |
190 | |||
6084 | serge | 191 | drm_for_each_crtc(crtc, dev) { |
192 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
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1123 | serge | 193 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
194 | if (!crtc->enabled) { |
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1963 | serge | 195 | if (crtc_funcs->disable) |
196 | (*crtc_funcs->disable)(crtc); |
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197 | else |
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198 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); |
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5060 | serge | 199 | crtc->primary->fb = NULL; |
1123 | serge | 200 | } |
201 | } |
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202 | } |
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5060 | serge | 203 | |
204 | /** |
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205 | * drm_helper_disable_unused_functions - disable unused objects |
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206 | * @dev: DRM device |
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207 | * |
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208 | * This function walks through the entire mode setting configuration of @dev. It |
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209 | * will remove any crtc links of unused encoders and encoder links of |
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210 | * disconnected connectors. Then it will disable all unused encoders and crtcs |
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211 | * either by calling their disable callback if available or by calling their |
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212 | * dpms callback with DRM_MODE_DPMS_OFF. |
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213 | */ |
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214 | void drm_helper_disable_unused_functions(struct drm_device *dev) |
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215 | { |
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216 | drm_modeset_lock_all(dev); |
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217 | __drm_helper_disable_unused_functions(dev); |
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218 | drm_modeset_unlock_all(dev); |
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219 | } |
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1123 | serge | 220 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
221 | |||
222 | /* |
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223 | * Check the CRTC we're going to map each output to vs. its current |
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224 | * CRTC. If they don't match, we have to disable the output and the CRTC |
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225 | * since the driver will have to re-route things. |
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226 | */ |
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227 | static void |
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228 | drm_crtc_prepare_encoders(struct drm_device *dev) |
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229 | { |
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6084 | serge | 230 | const struct drm_encoder_helper_funcs *encoder_funcs; |
1123 | serge | 231 | struct drm_encoder *encoder; |
232 | |||
6084 | serge | 233 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 234 | encoder_funcs = encoder->helper_private; |
235 | /* Disable unused encoders */ |
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236 | if (encoder->crtc == NULL) |
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1963 | serge | 237 | drm_encoder_disable(encoder); |
1123 | serge | 238 | /* Disable encoders whose CRTC is about to change */ |
239 | if (encoder_funcs->get_crtc && |
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240 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) |
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1963 | serge | 241 | drm_encoder_disable(encoder); |
1123 | serge | 242 | } |
243 | } |
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244 | |||
245 | /** |
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3192 | Serge | 246 | * drm_crtc_helper_set_mode - internal helper to set a mode |
1123 | serge | 247 | * @crtc: CRTC to program |
248 | * @mode: mode to use |
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3192 | Serge | 249 | * @x: horizontal offset into the surface |
250 | * @y: vertical offset into the surface |
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251 | * @old_fb: old framebuffer, for cleanup |
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1123 | serge | 252 | * |
253 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
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3192 | Serge | 254 | * to fixup or reject the mode prior to trying to set it. This is an internal |
255 | * helper that drivers could e.g. use to update properties that require the |
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256 | * entire output pipe to be disabled and re-enabled in a new configuration. For |
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257 | * example for changing whether audio is enabled on a hdmi link or for changing |
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258 | * panel fitter or dither attributes. It is also called by the |
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259 | * drm_crtc_helper_set_config() helper function to drive the mode setting |
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260 | * sequence. |
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1123 | serge | 261 | * |
5060 | serge | 262 | * Returns: |
263 | * True if the mode was set successfully, false otherwise. |
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1123 | serge | 264 | */ |
265 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, |
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266 | struct drm_display_mode *mode, |
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267 | int x, int y, |
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268 | struct drm_framebuffer *old_fb) |
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269 | { |
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270 | struct drm_device *dev = crtc->dev; |
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6084 | serge | 271 | struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
272 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
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273 | const struct drm_encoder_helper_funcs *encoder_funcs; |
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1123 | serge | 274 | int saved_x, saved_y; |
4560 | Serge | 275 | bool saved_enabled; |
1123 | serge | 276 | struct drm_encoder *encoder; |
277 | bool ret = true; |
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278 | |||
5060 | serge | 279 | drm_warn_on_modeset_not_all_locked(dev); |
280 | |||
4560 | Serge | 281 | saved_enabled = crtc->enabled; |
1123 | serge | 282 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
283 | if (!crtc->enabled) |
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284 | return true; |
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285 | |||
1963 | serge | 286 | adjusted_mode = drm_mode_duplicate(dev, mode); |
4560 | Serge | 287 | if (!adjusted_mode) { |
288 | crtc->enabled = saved_enabled; |
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3031 | serge | 289 | return false; |
4560 | Serge | 290 | } |
1963 | serge | 291 | |
1123 | serge | 292 | saved_mode = crtc->mode; |
6084 | serge | 293 | saved_hwmode = crtc->hwmode; |
1123 | serge | 294 | saved_x = crtc->x; |
295 | saved_y = crtc->y; |
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296 | |||
297 | /* Update crtc values up front so the driver can rely on them for mode |
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298 | * setting. |
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299 | */ |
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300 | crtc->mode = *mode; |
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301 | crtc->x = x; |
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302 | crtc->y = y; |
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303 | |||
304 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
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305 | * adjust it according to limitations or connector properties, and also |
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306 | * a chance to reject the mode entirely. |
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307 | */ |
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6084 | serge | 308 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 309 | |
310 | if (encoder->crtc != crtc) |
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311 | continue; |
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4104 | Serge | 312 | |
6084 | serge | 313 | ret = drm_bridge_mode_fixup(encoder->bridge, |
314 | mode, adjusted_mode); |
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315 | if (!ret) { |
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316 | DRM_DEBUG_KMS("Bridge fixup failed\n"); |
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317 | goto done; |
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4104 | Serge | 318 | } |
319 | |||
1123 | serge | 320 | encoder_funcs = encoder->helper_private; |
321 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, |
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322 | adjusted_mode))) { |
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3031 | serge | 323 | DRM_DEBUG_KMS("Encoder fixup failed\n"); |
1123 | serge | 324 | goto done; |
325 | } |
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326 | } |
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327 | |||
328 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { |
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3031 | serge | 329 | DRM_DEBUG_KMS("CRTC fixup failed\n"); |
1123 | serge | 330 | goto done; |
331 | } |
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1963 | serge | 332 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
1123 | serge | 333 | |
6084 | serge | 334 | crtc->hwmode = *adjusted_mode; |
335 | |||
1123 | serge | 336 | /* Prepare the encoders and CRTCs before setting the mode. */ |
6084 | serge | 337 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 338 | |
339 | if (encoder->crtc != crtc) |
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340 | continue; |
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4104 | Serge | 341 | |
6084 | serge | 342 | drm_bridge_disable(encoder->bridge); |
4104 | Serge | 343 | |
1123 | serge | 344 | encoder_funcs = encoder->helper_private; |
345 | /* Disable the encoders as the first thing we do. */ |
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346 | encoder_funcs->prepare(encoder); |
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4104 | Serge | 347 | |
6084 | serge | 348 | drm_bridge_post_disable(encoder->bridge); |
1123 | serge | 349 | } |
350 | |||
351 | drm_crtc_prepare_encoders(dev); |
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352 | |||
353 | crtc_funcs->prepare(crtc); |
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354 | |||
355 | /* Set up the DPLL and any encoders state that needs to adjust or depend |
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356 | * on the DPLL. |
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357 | */ |
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358 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
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359 | if (!ret) |
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360 | goto done; |
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361 | |||
6084 | serge | 362 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 363 | |
364 | if (encoder->crtc != crtc) |
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365 | continue; |
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366 | |||
1963 | serge | 367 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
5060 | serge | 368 | encoder->base.id, encoder->name, |
1963 | serge | 369 | mode->base.id, mode->name); |
1123 | serge | 370 | encoder_funcs = encoder->helper_private; |
371 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); |
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4104 | Serge | 372 | |
6084 | serge | 373 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
1123 | serge | 374 | } |
375 | |||
376 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ |
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377 | crtc_funcs->commit(crtc); |
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378 | |||
6084 | serge | 379 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 380 | |
381 | if (encoder->crtc != crtc) |
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382 | continue; |
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383 | |||
6084 | serge | 384 | drm_bridge_pre_enable(encoder->bridge); |
4104 | Serge | 385 | |
1123 | serge | 386 | encoder_funcs = encoder->helper_private; |
387 | encoder_funcs->commit(encoder); |
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388 | |||
6084 | serge | 389 | drm_bridge_enable(encoder->bridge); |
1123 | serge | 390 | } |
391 | |||
1963 | serge | 392 | /* Calculate and store various constants which |
393 | * are later needed by vblank and swap-completion |
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394 | * timestamping. They are derived from true hwmode. |
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395 | */ |
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4560 | Serge | 396 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
1963 | serge | 397 | |
1123 | serge | 398 | /* FIXME: add subpixel order */ |
399 | done: |
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1963 | serge | 400 | drm_mode_destroy(dev, adjusted_mode); |
1123 | serge | 401 | if (!ret) { |
4560 | Serge | 402 | crtc->enabled = saved_enabled; |
1123 | serge | 403 | crtc->mode = saved_mode; |
6084 | serge | 404 | crtc->hwmode = saved_hwmode; |
1123 | serge | 405 | crtc->x = saved_x; |
406 | crtc->y = saved_y; |
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407 | } |
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1179 | serge | 408 | |
1123 | serge | 409 | return ret; |
410 | } |
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411 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); |
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412 | |||
5060 | serge | 413 | static void |
3031 | serge | 414 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
415 | { |
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416 | struct drm_device *dev = crtc->dev; |
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417 | struct drm_connector *connector; |
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418 | struct drm_encoder *encoder; |
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419 | |||
420 | /* Decouple all encoders and their attached connectors from this crtc */ |
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6084 | serge | 421 | drm_for_each_encoder(encoder, dev) { |
3031 | serge | 422 | if (encoder->crtc != crtc) |
423 | continue; |
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424 | |||
6084 | serge | 425 | drm_for_each_connector(connector, dev) { |
3031 | serge | 426 | if (connector->encoder != encoder) |
427 | continue; |
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428 | |||
429 | connector->encoder = NULL; |
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4560 | Serge | 430 | |
431 | /* |
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432 | * drm_helper_disable_unused_functions() ought to be |
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433 | * doing this, but since we've decoupled the encoder |
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434 | * from the connector above, the required connection |
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435 | * between them is henceforth no longer available. |
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436 | */ |
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437 | connector->dpms = DRM_MODE_DPMS_OFF; |
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3031 | serge | 438 | } |
439 | } |
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440 | |||
5060 | serge | 441 | __drm_helper_disable_unused_functions(dev); |
3031 | serge | 442 | } |
443 | |||
1123 | serge | 444 | /** |
445 | * drm_crtc_helper_set_config - set a new config from userspace |
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3192 | Serge | 446 | * @set: mode set configuration |
1123 | serge | 447 | * |
3192 | Serge | 448 | * Setup a new configuration, provided by the upper layers (either an ioctl call |
5060 | serge | 449 | * from userspace or internally e.g. from the fbdev support code) in @set, and |
3192 | Serge | 450 | * enable it. This is the main helper functions for drivers that implement |
451 | * kernel mode setting with the crtc helper functions and the assorted |
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452 | * ->prepare(), ->modeset() and ->commit() helper callbacks. |
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1123 | serge | 453 | * |
5060 | serge | 454 | * Returns: |
455 | * Returns 0 on success, negative errno numbers on failure. |
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1123 | serge | 456 | */ |
457 | int drm_crtc_helper_set_config(struct drm_mode_set *set) |
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458 | { |
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459 | struct drm_device *dev; |
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4560 | Serge | 460 | struct drm_crtc *new_crtc; |
1179 | serge | 461 | struct drm_encoder *save_encoders, *new_encoder, *encoder; |
462 | bool mode_changed = false; /* if true do a full mode set */ |
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463 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ |
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464 | struct drm_connector *save_connectors, *connector; |
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1123 | serge | 465 | int count = 0, ro, fail = 0; |
6084 | serge | 466 | const struct drm_crtc_helper_funcs *crtc_funcs; |
3031 | serge | 467 | struct drm_mode_set save_set; |
468 | int ret; |
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1963 | serge | 469 | int i; |
1123 | serge | 470 | |
1179 | serge | 471 | DRM_DEBUG_KMS("\n"); |
1123 | serge | 472 | |
4075 | Serge | 473 | BUG_ON(!set); |
474 | BUG_ON(!set->crtc); |
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475 | BUG_ON(!set->crtc->helper_private); |
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1123 | serge | 476 | |
4075 | Serge | 477 | /* Enforce sane interface api - has been abused by the fb helper. */ |
478 | BUG_ON(!set->mode && set->fb); |
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479 | BUG_ON(set->fb && set->num_connectors == 0); |
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1123 | serge | 480 | |
481 | crtc_funcs = set->crtc->helper_private; |
||
482 | |||
1963 | serge | 483 | if (!set->mode) |
484 | set->fb = NULL; |
||
485 | |||
486 | if (set->fb) { |
||
487 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
||
488 | set->crtc->base.id, set->fb->base.id, |
||
6084 | serge | 489 | (int)set->num_connectors, set->x, set->y); |
1963 | serge | 490 | } else { |
491 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); |
||
5060 | serge | 492 | drm_crtc_helper_disable(set->crtc); |
493 | return 0; |
||
1963 | serge | 494 | } |
1123 | serge | 495 | |
496 | dev = set->crtc->dev; |
||
497 | |||
5060 | serge | 498 | drm_warn_on_modeset_not_all_locked(dev); |
499 | |||
4560 | Serge | 500 | /* |
501 | * Allocate space for the backup of all (non-pointer) encoder and |
||
502 | * connector data. |
||
503 | */ |
||
1179 | serge | 504 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
505 | sizeof(struct drm_encoder), GFP_KERNEL); |
||
4560 | Serge | 506 | if (!save_encoders) |
1123 | serge | 507 | return -ENOMEM; |
508 | |||
1179 | serge | 509 | save_connectors = kzalloc(dev->mode_config.num_connector * |
510 | sizeof(struct drm_connector), GFP_KERNEL); |
||
511 | if (!save_connectors) { |
||
512 | kfree(save_encoders); |
||
513 | return -ENOMEM; |
||
514 | } |
||
515 | |||
4560 | Serge | 516 | /* |
517 | * Copy data. Note that driver private data is not affected. |
||
1179 | serge | 518 | * Should anything bad happen only the expected state is |
519 | * restored, not the drivers personal bookkeeping. |
||
520 | */ |
||
521 | count = 0; |
||
6084 | serge | 522 | drm_for_each_encoder(encoder, dev) { |
1179 | serge | 523 | save_encoders[count++] = *encoder; |
524 | } |
||
525 | |||
526 | count = 0; |
||
6084 | serge | 527 | drm_for_each_connector(connector, dev) { |
1179 | serge | 528 | save_connectors[count++] = *connector; |
529 | } |
||
530 | |||
3031 | serge | 531 | save_set.crtc = set->crtc; |
532 | save_set.mode = &set->crtc->mode; |
||
533 | save_set.x = set->crtc->x; |
||
534 | save_set.y = set->crtc->y; |
||
5060 | serge | 535 | save_set.fb = set->crtc->primary->fb; |
3031 | serge | 536 | |
1123 | serge | 537 | /* We should be able to check here if the fb has the same properties |
538 | * and then just flip_or_move it */ |
||
5060 | serge | 539 | if (set->crtc->primary->fb != set->fb) { |
1123 | serge | 540 | /* If we have no fb then treat it as a full mode set */ |
5060 | serge | 541 | if (set->crtc->primary->fb == NULL) { |
1179 | serge | 542 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
1123 | serge | 543 | mode_changed = true; |
1179 | serge | 544 | } else if (set->fb == NULL) { |
545 | mode_changed = true; |
||
3746 | Serge | 546 | } else if (set->fb->pixel_format != |
5060 | serge | 547 | set->crtc->primary->fb->pixel_format) { |
3746 | Serge | 548 | mode_changed = true; |
1430 | serge | 549 | } else |
1123 | serge | 550 | fb_changed = true; |
551 | } |
||
552 | |||
553 | if (set->x != set->crtc->x || set->y != set->crtc->y) |
||
554 | fb_changed = true; |
||
555 | |||
556 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { |
||
1179 | serge | 557 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
1123 | serge | 558 | drm_mode_debug_printmodeline(&set->crtc->mode); |
559 | drm_mode_debug_printmodeline(set->mode); |
||
560 | mode_changed = true; |
||
561 | } |
||
562 | |||
563 | /* a) traverse passed in connector list and get encoders for them */ |
||
564 | count = 0; |
||
6084 | serge | 565 | drm_for_each_connector(connector, dev) { |
566 | const struct drm_connector_helper_funcs *connector_funcs = |
||
1123 | serge | 567 | connector->helper_private; |
568 | new_encoder = connector->encoder; |
||
569 | for (ro = 0; ro < set->num_connectors; ro++) { |
||
570 | if (set->connectors[ro] == connector) { |
||
571 | new_encoder = connector_funcs->best_encoder(connector); |
||
572 | /* if we can't get an encoder for a connector |
||
573 | we are setting now - then fail */ |
||
574 | if (new_encoder == NULL) |
||
575 | /* don't break so fail path works correct */ |
||
576 | fail = 1; |
||
4075 | Serge | 577 | |
578 | if (connector->dpms != DRM_MODE_DPMS_ON) { |
||
579 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); |
||
580 | mode_changed = true; |
||
581 | } |
||
5060 | serge | 582 | |
583 | break; |
||
1123 | serge | 584 | } |
585 | } |
||
586 | |||
587 | if (new_encoder != connector->encoder) { |
||
1179 | serge | 588 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
1123 | serge | 589 | mode_changed = true; |
1179 | serge | 590 | /* If the encoder is reused for another connector, then |
591 | * the appropriate crtc will be set later. |
||
592 | */ |
||
593 | if (connector->encoder) |
||
594 | connector->encoder->crtc = NULL; |
||
1123 | serge | 595 | connector->encoder = new_encoder; |
596 | } |
||
597 | } |
||
598 | |||
599 | if (fail) { |
||
600 | ret = -EINVAL; |
||
1179 | serge | 601 | goto fail; |
1123 | serge | 602 | } |
603 | |||
604 | count = 0; |
||
6084 | serge | 605 | drm_for_each_connector(connector, dev) { |
1123 | serge | 606 | if (!connector->encoder) |
607 | continue; |
||
608 | |||
609 | if (connector->encoder->crtc == set->crtc) |
||
610 | new_crtc = NULL; |
||
611 | else |
||
612 | new_crtc = connector->encoder->crtc; |
||
613 | |||
614 | for (ro = 0; ro < set->num_connectors; ro++) { |
||
615 | if (set->connectors[ro] == connector) |
||
616 | new_crtc = set->crtc; |
||
617 | } |
||
618 | |||
619 | /* Make sure the new CRTC will work with the encoder */ |
||
620 | if (new_crtc && |
||
621 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { |
||
622 | ret = -EINVAL; |
||
1179 | serge | 623 | goto fail; |
1123 | serge | 624 | } |
625 | if (new_crtc != connector->encoder->crtc) { |
||
1179 | serge | 626 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
1123 | serge | 627 | mode_changed = true; |
628 | connector->encoder->crtc = new_crtc; |
||
629 | } |
||
1963 | serge | 630 | if (new_crtc) { |
631 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", |
||
5060 | serge | 632 | connector->base.id, connector->name, |
1963 | serge | 633 | new_crtc->base.id); |
634 | } else { |
||
635 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", |
||
5060 | serge | 636 | connector->base.id, connector->name); |
1963 | serge | 637 | } |
1123 | serge | 638 | } |
639 | |||
640 | /* mode_set_base is not a required function */ |
||
641 | if (fb_changed && !crtc_funcs->mode_set_base) |
||
642 | mode_changed = true; |
||
643 | |||
644 | if (mode_changed) { |
||
4560 | Serge | 645 | if (drm_helper_crtc_in_use(set->crtc)) { |
1179 | serge | 646 | DRM_DEBUG_KMS("attempting to set mode from" |
647 | " userspace\n"); |
||
1123 | serge | 648 | drm_mode_debug_printmodeline(set->mode); |
5060 | serge | 649 | set->crtc->primary->fb = set->fb; |
1123 | serge | 650 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
651 | set->x, set->y, |
||
4560 | Serge | 652 | save_set.fb)) { |
1963 | serge | 653 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
654 | set->crtc->base.id); |
||
5060 | serge | 655 | set->crtc->primary->fb = save_set.fb; |
1123 | serge | 656 | ret = -EINVAL; |
1179 | serge | 657 | goto fail; |
1123 | serge | 658 | } |
1963 | serge | 659 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
660 | for (i = 0; i < set->num_connectors; i++) { |
||
661 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, |
||
5060 | serge | 662 | set->connectors[i]->name); |
3031 | serge | 663 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
1963 | serge | 664 | } |
1123 | serge | 665 | } |
5060 | serge | 666 | __drm_helper_disable_unused_functions(dev); |
1123 | serge | 667 | } else if (fb_changed) { |
1179 | serge | 668 | set->crtc->x = set->x; |
669 | set->crtc->y = set->y; |
||
5060 | serge | 670 | set->crtc->primary->fb = set->fb; |
1123 | serge | 671 | ret = crtc_funcs->mode_set_base(set->crtc, |
4560 | Serge | 672 | set->x, set->y, save_set.fb); |
1963 | serge | 673 | if (ret != 0) { |
4560 | Serge | 674 | set->crtc->x = save_set.x; |
675 | set->crtc->y = save_set.y; |
||
5060 | serge | 676 | set->crtc->primary->fb = save_set.fb; |
1179 | serge | 677 | goto fail; |
6084 | serge | 678 | } |
1123 | serge | 679 | } |
680 | |||
1179 | serge | 681 | kfree(save_connectors); |
1123 | serge | 682 | kfree(save_encoders); |
683 | return 0; |
||
684 | |||
1179 | serge | 685 | fail: |
686 | /* Restore all previous data. */ |
||
1123 | serge | 687 | count = 0; |
6084 | serge | 688 | drm_for_each_encoder(encoder, dev) { |
1179 | serge | 689 | *encoder = save_encoders[count++]; |
1123 | serge | 690 | } |
1179 | serge | 691 | |
1123 | serge | 692 | count = 0; |
6084 | serge | 693 | drm_for_each_connector(connector, dev) { |
1179 | serge | 694 | *connector = save_connectors[count++]; |
1123 | serge | 695 | } |
1179 | serge | 696 | |
3031 | serge | 697 | /* Try to restore the config */ |
698 | if (mode_changed && |
||
699 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, |
||
700 | save_set.y, save_set.fb)) |
||
701 | DRM_ERROR("failed to restore config after modeset failure\n"); |
||
702 | |||
1179 | serge | 703 | kfree(save_connectors); |
1123 | serge | 704 | kfree(save_encoders); |
705 | return ret; |
||
706 | } |
||
707 | EXPORT_SYMBOL(drm_crtc_helper_set_config); |
||
708 | |||
709 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
||
710 | { |
||
711 | int dpms = DRM_MODE_DPMS_OFF; |
||
712 | struct drm_connector *connector; |
||
713 | struct drm_device *dev = encoder->dev; |
||
714 | |||
6084 | serge | 715 | drm_for_each_connector(connector, dev) |
1123 | serge | 716 | if (connector->encoder == encoder) |
717 | if (connector->dpms < dpms) |
||
718 | dpms = connector->dpms; |
||
719 | return dpms; |
||
720 | } |
||
721 | |||
4104 | Serge | 722 | /* Helper which handles bridge ordering around encoder dpms */ |
723 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) |
||
724 | { |
||
725 | struct drm_bridge *bridge = encoder->bridge; |
||
6084 | serge | 726 | const struct drm_encoder_helper_funcs *encoder_funcs; |
4104 | Serge | 727 | |
6084 | serge | 728 | if (mode == DRM_MODE_DPMS_ON) |
729 | drm_bridge_pre_enable(bridge); |
||
730 | else |
||
731 | drm_bridge_disable(bridge); |
||
4104 | Serge | 732 | |
733 | encoder_funcs = encoder->helper_private; |
||
734 | if (encoder_funcs->dpms) |
||
735 | encoder_funcs->dpms(encoder, mode); |
||
736 | |||
6084 | serge | 737 | if (mode == DRM_MODE_DPMS_ON) |
738 | drm_bridge_enable(bridge); |
||
739 | else |
||
740 | drm_bridge_post_disable(bridge); |
||
4104 | Serge | 741 | } |
742 | |||
1123 | serge | 743 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
744 | { |
||
745 | int dpms = DRM_MODE_DPMS_OFF; |
||
746 | struct drm_connector *connector; |
||
747 | struct drm_device *dev = crtc->dev; |
||
748 | |||
6084 | serge | 749 | drm_for_each_connector(connector, dev) |
1123 | serge | 750 | if (connector->encoder && connector->encoder->crtc == crtc) |
751 | if (connector->dpms < dpms) |
||
752 | dpms = connector->dpms; |
||
753 | return dpms; |
||
754 | } |
||
755 | |||
756 | /** |
||
3192 | Serge | 757 | * drm_helper_connector_dpms() - connector dpms helper implementation |
758 | * @connector: affected connector |
||
759 | * @mode: DPMS mode |
||
1123 | serge | 760 | * |
3192 | Serge | 761 | * This is the main helper function provided by the crtc helper framework for |
762 | * implementing the DPMS connector attribute. It computes the new desired DPMS |
||
763 | * state for all encoders and crtcs in the output mesh and calls the ->dpms() |
||
764 | * callback provided by the driver appropriately. |
||
6084 | serge | 765 | * |
766 | * Returns: |
||
767 | * Always returns 0. |
||
1123 | serge | 768 | */ |
6084 | serge | 769 | int drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
1123 | serge | 770 | { |
771 | struct drm_encoder *encoder = connector->encoder; |
||
772 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; |
||
4104 | Serge | 773 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
1123 | serge | 774 | |
775 | if (mode == connector->dpms) |
||
6084 | serge | 776 | return 0; |
1123 | serge | 777 | |
778 | old_dpms = connector->dpms; |
||
779 | connector->dpms = mode; |
||
780 | |||
4104 | Serge | 781 | if (encoder) |
782 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); |
||
783 | |||
1123 | serge | 784 | /* from off to on, do crtc then encoder */ |
785 | if (mode < old_dpms) { |
||
786 | if (crtc) { |
||
6084 | serge | 787 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
1123 | serge | 788 | if (crtc_funcs->dpms) |
789 | (*crtc_funcs->dpms) (crtc, |
||
790 | drm_helper_choose_crtc_dpms(crtc)); |
||
791 | } |
||
4104 | Serge | 792 | if (encoder) |
793 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1123 | serge | 794 | } |
795 | |||
796 | /* from on to off, do encoder then crtc */ |
||
797 | if (mode > old_dpms) { |
||
4104 | Serge | 798 | if (encoder) |
799 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1123 | serge | 800 | if (crtc) { |
6084 | serge | 801 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
1123 | serge | 802 | if (crtc_funcs->dpms) |
803 | (*crtc_funcs->dpms) (crtc, |
||
804 | drm_helper_choose_crtc_dpms(crtc)); |
||
805 | } |
||
806 | } |
||
807 | |||
6084 | serge | 808 | return 0; |
1123 | serge | 809 | } |
810 | EXPORT_SYMBOL(drm_helper_connector_dpms); |
||
811 | |||
5060 | serge | 812 | /** |
813 | * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata |
||
814 | * @fb: drm_framebuffer object to fill out |
||
815 | * @mode_cmd: metadata from the userspace fb creation request |
||
816 | * |
||
817 | * This helper can be used in a drivers fb_create callback to pre-fill the fb's |
||
818 | * metadata fields. |
||
819 | */ |
||
820 | void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
||
6084 | serge | 821 | struct drm_mode_fb_cmd2 *mode_cmd) |
1123 | serge | 822 | { |
3031 | serge | 823 | int i; |
824 | |||
1123 | serge | 825 | fb->width = mode_cmd->width; |
826 | fb->height = mode_cmd->height; |
||
3031 | serge | 827 | for (i = 0; i < 4; i++) { |
828 | fb->pitches[i] = mode_cmd->pitches[i]; |
||
829 | fb->offsets[i] = mode_cmd->offsets[i]; |
||
6084 | serge | 830 | fb->modifier[i] = mode_cmd->modifier[i]; |
3031 | serge | 831 | } |
832 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
||
833 | &fb->bits_per_pixel); |
||
834 | fb->pixel_format = mode_cmd->pixel_format; |
||
5060 | serge | 835 | fb->flags = mode_cmd->flags; |
1123 | serge | 836 | } |
837 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); |
||
838 | |||
5060 | serge | 839 | /** |
840 | * drm_helper_resume_force_mode - force-restore mode setting configuration |
||
841 | * @dev: drm_device which should be restored |
||
842 | * |
||
843 | * Drivers which use the mode setting helpers can use this function to |
||
844 | * force-restore the mode setting configuration e.g. on resume or when something |
||
845 | * else might have trampled over the hw state (like some overzealous old BIOSen |
||
846 | * tended to do). |
||
847 | * |
||
848 | * This helper doesn't provide a error return value since restoring the old |
||
849 | * config should never fail due to resource allocation issues since the driver |
||
850 | * has successfully set the restored configuration already. Hence this should |
||
851 | * boil down to the equivalent of a few dpms on calls, which also don't provide |
||
852 | * an error code. |
||
853 | * |
||
854 | * Drivers where simply restoring an old configuration again might fail (e.g. |
||
855 | * due to slight differences in allocating shared resources when the |
||
856 | * configuration is restored in a different order than when userspace set it up) |
||
857 | * need to use their own restore logic. |
||
858 | */ |
||
859 | void drm_helper_resume_force_mode(struct drm_device *dev) |
||
1123 | serge | 860 | { |
861 | struct drm_crtc *crtc; |
||
1404 | serge | 862 | struct drm_encoder *encoder; |
6084 | serge | 863 | const struct drm_crtc_helper_funcs *crtc_funcs; |
5060 | serge | 864 | int encoder_dpms; |
865 | bool ret; |
||
1123 | serge | 866 | |
5060 | serge | 867 | drm_modeset_lock_all(dev); |
6084 | serge | 868 | drm_for_each_crtc(crtc, dev) { |
1123 | serge | 869 | |
6084 | serge | 870 | if (!crtc->enabled) |
871 | continue; |
||
1123 | serge | 872 | |
1179 | serge | 873 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
5060 | serge | 874 | crtc->x, crtc->y, crtc->primary->fb); |
1123 | serge | 875 | |
5060 | serge | 876 | /* Restoring the old config should never fail! */ |
1123 | serge | 877 | if (ret == false) |
878 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); |
||
1404 | serge | 879 | |
880 | /* Turn off outputs that were already powered off */ |
||
881 | if (drm_helper_choose_crtc_dpms(crtc)) { |
||
6084 | serge | 882 | drm_for_each_encoder(encoder, dev) { |
1404 | serge | 883 | |
884 | if(encoder->crtc != crtc) |
||
885 | continue; |
||
886 | |||
4104 | Serge | 887 | encoder_dpms = drm_helper_choose_encoder_dpms( |
888 | encoder); |
||
889 | |||
890 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1963 | serge | 891 | } |
1404 | serge | 892 | |
6084 | serge | 893 | crtc_funcs = crtc->helper_private; |
894 | if (crtc_funcs->dpms) |
||
895 | (*crtc_funcs->dpms) (crtc, |
||
896 | drm_helper_choose_crtc_dpms(crtc)); |
||
1404 | serge | 897 | } |
6084 | serge | 898 | } |
5060 | serge | 899 | |
1179 | serge | 900 | /* disable the unused connectors while restoring the modesetting */ |
5060 | serge | 901 | __drm_helper_disable_unused_functions(dev); |
902 | drm_modeset_unlock_all(dev); |
||
1123 | serge | 903 | } |
904 | EXPORT_SYMBOL(drm_helper_resume_force_mode); |
||
5271 | serge | 905 | |
906 | /** |
||
907 | * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers |
||
908 | * @crtc: DRM CRTC |
||
909 | * @mode: DRM display mode which userspace requested |
||
910 | * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks |
||
911 | * @x: x offset of the CRTC scanout area on the underlying framebuffer |
||
912 | * @y: y offset of the CRTC scanout area on the underlying framebuffer |
||
913 | * @old_fb: previous framebuffer |
||
914 | * |
||
915 | * This function implements a callback useable as the ->mode_set callback |
||
916 | * required by the crtc helpers. Besides the atomic plane helper functions for |
||
917 | * the primary plane the driver must also provide the ->mode_set_nofb callback |
||
918 | * to set up the crtc. |
||
919 | * |
||
920 | * This is a transitional helper useful for converting drivers to the atomic |
||
921 | * interfaces. |
||
922 | */ |
||
923 | int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, |
||
924 | struct drm_display_mode *adjusted_mode, int x, int y, |
||
925 | struct drm_framebuffer *old_fb) |
||
926 | { |
||
927 | struct drm_crtc_state *crtc_state; |
||
6084 | serge | 928 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
5271 | serge | 929 | int ret; |
930 | |||
931 | if (crtc->funcs->atomic_duplicate_state) |
||
932 | crtc_state = crtc->funcs->atomic_duplicate_state(crtc); |
||
6084 | serge | 933 | else { |
934 | if (!crtc->state) |
||
935 | drm_atomic_helper_crtc_reset(crtc); |
||
936 | |||
937 | crtc_state = drm_atomic_helper_crtc_duplicate_state(crtc); |
||
938 | } |
||
939 | |||
5271 | serge | 940 | if (!crtc_state) |
941 | return -ENOMEM; |
||
942 | |||
943 | crtc_state->planes_changed = true; |
||
944 | crtc_state->mode_changed = true; |
||
6084 | serge | 945 | ret = drm_atomic_set_mode_for_crtc(crtc_state, mode); |
946 | if (ret) |
||
947 | goto out; |
||
5271 | serge | 948 | drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode); |
949 | |||
950 | if (crtc_funcs->atomic_check) { |
||
951 | ret = crtc_funcs->atomic_check(crtc, crtc_state); |
||
6084 | serge | 952 | if (ret) |
953 | goto out; |
||
5271 | serge | 954 | } |
955 | |||
956 | swap(crtc->state, crtc_state); |
||
957 | |||
958 | crtc_funcs->mode_set_nofb(crtc); |
||
959 | |||
6084 | serge | 960 | ret = drm_helper_crtc_mode_set_base(crtc, x, y, old_fb); |
961 | |||
962 | out: |
||
5271 | serge | 963 | if (crtc_state) { |
964 | if (crtc->funcs->atomic_destroy_state) |
||
965 | crtc->funcs->atomic_destroy_state(crtc, crtc_state); |
||
966 | else |
||
6084 | serge | 967 | drm_atomic_helper_crtc_destroy_state(crtc, crtc_state); |
5271 | serge | 968 | } |
969 | |||
6084 | serge | 970 | return ret; |
5271 | serge | 971 | } |
972 | EXPORT_SYMBOL(drm_helper_crtc_mode_set); |
||
973 | |||
974 | /** |
||
975 | * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers |
||
976 | * @crtc: DRM CRTC |
||
977 | * @x: x offset of the CRTC scanout area on the underlying framebuffer |
||
978 | * @y: y offset of the CRTC scanout area on the underlying framebuffer |
||
979 | * @old_fb: previous framebuffer |
||
980 | * |
||
981 | * This function implements a callback useable as the ->mode_set_base used |
||
982 | * required by the crtc helpers. The driver must provide the atomic plane helper |
||
983 | * functions for the primary plane. |
||
984 | * |
||
985 | * This is a transitional helper useful for converting drivers to the atomic |
||
986 | * interfaces. |
||
987 | */ |
||
988 | int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, |
||
989 | struct drm_framebuffer *old_fb) |
||
990 | { |
||
991 | struct drm_plane_state *plane_state; |
||
992 | struct drm_plane *plane = crtc->primary; |
||
993 | |||
994 | if (plane->funcs->atomic_duplicate_state) |
||
995 | plane_state = plane->funcs->atomic_duplicate_state(plane); |
||
996 | else if (plane->state) |
||
997 | plane_state = drm_atomic_helper_plane_duplicate_state(plane); |
||
998 | else |
||
999 | plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL); |
||
1000 | if (!plane_state) |
||
1001 | return -ENOMEM; |
||
6084 | serge | 1002 | plane_state->plane = plane; |
5271 | serge | 1003 | |
1004 | plane_state->crtc = crtc; |
||
1005 | drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb); |
||
1006 | plane_state->crtc_x = 0; |
||
1007 | plane_state->crtc_y = 0; |
||
1008 | plane_state->crtc_h = crtc->mode.vdisplay; |
||
1009 | plane_state->crtc_w = crtc->mode.hdisplay; |
||
1010 | plane_state->src_x = x << 16; |
||
1011 | plane_state->src_y = y << 16; |
||
1012 | plane_state->src_h = crtc->mode.vdisplay << 16; |
||
1013 | plane_state->src_w = crtc->mode.hdisplay << 16; |
||
1014 | |||
1015 | return drm_plane_helper_commit(plane, plane_state, old_fb); |
||
1016 | } |
||
1017 | EXPORT_SYMBOL(drm_helper_crtc_mode_set_base);><>><>><>><>>>>>>>> |