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Rev | Author | Line No. | Line |
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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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6937 | serge | 54 | * Note that this helper library doesn't track the current power state of CRTCs |
55 | * and encoders. It can call callbacks like ->dpms() even though the hardware is |
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56 | * already in the desired state. This deficiency has been fixed in the atomic |
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57 | * helpers. |
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58 | * |
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5271 | serge | 59 | * The driver callbacks are mostly compatible with the atomic modeset helpers, |
60 | * except for the handling of the primary plane: Atomic helpers require that the |
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61 | * primary plane is implemented as a real standalone plane and not directly tied |
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62 | * to the CRTC state. For easier transition this library provides functions to |
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63 | * implement the old semantics required by the CRTC helpers using the new plane |
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64 | * and atomic helper callbacks. |
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65 | * |
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66 | * Drivers are strongly urged to convert to the atomic helpers (by way of first |
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67 | * converting to the plane helpers). New drivers must not use these functions |
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68 | * but need to implement the atomic interface instead, potentially using the |
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69 | * atomic helpers for that. |
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6937 | serge | 70 | * |
71 | * These legacy modeset helpers use the same function table structures as |
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72 | * all other modesetting helpers. See the documentation for struct |
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73 | * &drm_crtc_helper_funcs, struct &drm_encoder_helper_funcs and struct |
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74 | * &drm_connector_helper_funcs. |
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5271 | serge | 75 | */ |
4560 | Serge | 76 | |
3192 | Serge | 77 | /** |
78 | * drm_helper_move_panel_connectors_to_head() - move panels to the front in the |
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79 | * connector list |
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80 | * @dev: drm device to operate on |
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81 | * |
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82 | * Some userspace presumes that the first connected connector is the main |
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83 | * display, where it's supposed to display e.g. the login screen. For |
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84 | * laptops, this should be the main panel. Use this function to sort all |
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85 | * (eDP/LVDS) panels to the front of the connector list, instead of |
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86 | * painstakingly trying to initialize them in the right order. |
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87 | */ |
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88 | void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) |
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89 | { |
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90 | struct drm_connector *connector, *tmp; |
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91 | struct list_head panel_list; |
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92 | |||
93 | INIT_LIST_HEAD(&panel_list); |
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94 | |||
95 | list_for_each_entry_safe(connector, tmp, |
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96 | &dev->mode_config.connector_list, head) { |
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97 | if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || |
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98 | connector->connector_type == DRM_MODE_CONNECTOR_eDP) |
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99 | list_move_tail(&connector->head, &panel_list); |
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100 | } |
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101 | |||
102 | list_splice(&panel_list, &dev->mode_config.connector_list); |
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103 | } |
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104 | EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); |
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105 | |||
1123 | serge | 106 | /** |
107 | * drm_helper_encoder_in_use - check if a given encoder is in use |
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108 | * @encoder: encoder to check |
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109 | * |
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5060 | serge | 110 | * Checks whether @encoder is with the current mode setting output configuration |
111 | * in use by any connector. This doesn't mean that it is actually enabled since |
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112 | * the DPMS state is tracked separately. |
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1123 | serge | 113 | * |
5060 | serge | 114 | * Returns: |
115 | * True if @encoder is used, false otherwise. |
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1123 | serge | 116 | */ |
117 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) |
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118 | { |
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119 | struct drm_connector *connector; |
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120 | struct drm_device *dev = encoder->dev; |
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6084 | serge | 121 | |
122 | /* |
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123 | * We can expect this mutex to be locked if we are not panicking. |
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124 | * Locking is currently fubar in the panic handler. |
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125 | */ |
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126 | if (!oops_in_progress) { |
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127 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
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128 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
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129 | } |
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130 | |||
131 | drm_for_each_connector(connector, dev) |
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1123 | serge | 132 | if (connector->encoder == encoder) |
133 | return true; |
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134 | return false; |
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135 | } |
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136 | EXPORT_SYMBOL(drm_helper_encoder_in_use); |
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137 | |||
138 | /** |
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139 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config |
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140 | * @crtc: CRTC to check |
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141 | * |
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5060 | serge | 142 | * Checks whether @crtc is with the current mode setting output configuration |
143 | * in use by any connector. This doesn't mean that it is actually enabled since |
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144 | * the DPMS state is tracked separately. |
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1123 | serge | 145 | * |
5060 | serge | 146 | * Returns: |
147 | * True if @crtc is used, false otherwise. |
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1123 | serge | 148 | */ |
149 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) |
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150 | { |
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151 | struct drm_encoder *encoder; |
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152 | struct drm_device *dev = crtc->dev; |
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6084 | serge | 153 | |
154 | /* |
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155 | * We can expect this mutex to be locked if we are not panicking. |
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156 | * Locking is currently fubar in the panic handler. |
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157 | */ |
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158 | if (!oops_in_progress) |
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159 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
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160 | |||
161 | drm_for_each_encoder(encoder, dev) |
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1123 | serge | 162 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
163 | return true; |
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164 | return false; |
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165 | } |
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166 | EXPORT_SYMBOL(drm_helper_crtc_in_use); |
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167 | |||
1963 | serge | 168 | static void |
169 | drm_encoder_disable(struct drm_encoder *encoder) |
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170 | { |
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6084 | serge | 171 | const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
1963 | serge | 172 | |
6084 | serge | 173 | drm_bridge_disable(encoder->bridge); |
4104 | Serge | 174 | |
1963 | serge | 175 | if (encoder_funcs->disable) |
176 | (*encoder_funcs->disable)(encoder); |
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177 | else |
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178 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
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4104 | Serge | 179 | |
6084 | serge | 180 | drm_bridge_post_disable(encoder->bridge); |
1963 | serge | 181 | } |
182 | |||
5060 | serge | 183 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
1123 | serge | 184 | { |
185 | struct drm_encoder *encoder; |
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186 | struct drm_crtc *crtc; |
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187 | |||
5060 | serge | 188 | drm_warn_on_modeset_not_all_locked(dev); |
1179 | serge | 189 | |
6084 | serge | 190 | drm_for_each_encoder(encoder, dev) { |
1179 | serge | 191 | if (!drm_helper_encoder_in_use(encoder)) { |
1963 | serge | 192 | drm_encoder_disable(encoder); |
5060 | serge | 193 | /* disconnect encoder from any connector */ |
1179 | serge | 194 | encoder->crtc = NULL; |
195 | } |
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1123 | serge | 196 | } |
197 | |||
6084 | serge | 198 | drm_for_each_crtc(crtc, dev) { |
199 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
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1123 | serge | 200 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
201 | if (!crtc->enabled) { |
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1963 | serge | 202 | if (crtc_funcs->disable) |
203 | (*crtc_funcs->disable)(crtc); |
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204 | else |
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205 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); |
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5060 | serge | 206 | crtc->primary->fb = NULL; |
1123 | serge | 207 | } |
208 | } |
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209 | } |
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5060 | serge | 210 | |
211 | /** |
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212 | * drm_helper_disable_unused_functions - disable unused objects |
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213 | * @dev: DRM device |
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214 | * |
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215 | * This function walks through the entire mode setting configuration of @dev. It |
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6937 | serge | 216 | * will remove any CRTC links of unused encoders and encoder links of |
217 | * disconnected connectors. Then it will disable all unused encoders and CRTCs |
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5060 | serge | 218 | * either by calling their disable callback if available or by calling their |
219 | * dpms callback with DRM_MODE_DPMS_OFF. |
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7144 | serge | 220 | * |
221 | * NOTE: |
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222 | * |
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223 | * This function is part of the legacy modeset helper library and will cause |
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224 | * major confusion with atomic drivers. This is because atomic helpers guarantee |
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225 | * to never call ->disable() hooks on a disabled function, or ->enable() hooks |
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226 | * on an enabled functions. drm_helper_disable_unused_functions() on the other |
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227 | * hand throws such guarantees into the wind and calls disable hooks |
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228 | * unconditionally on unused functions. |
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5060 | serge | 229 | */ |
230 | void drm_helper_disable_unused_functions(struct drm_device *dev) |
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231 | { |
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232 | drm_modeset_lock_all(dev); |
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233 | __drm_helper_disable_unused_functions(dev); |
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234 | drm_modeset_unlock_all(dev); |
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235 | } |
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1123 | serge | 236 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
237 | |||
238 | /* |
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239 | * Check the CRTC we're going to map each output to vs. its current |
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240 | * CRTC. If they don't match, we have to disable the output and the CRTC |
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241 | * since the driver will have to re-route things. |
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242 | */ |
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243 | static void |
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244 | drm_crtc_prepare_encoders(struct drm_device *dev) |
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245 | { |
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6084 | serge | 246 | const struct drm_encoder_helper_funcs *encoder_funcs; |
1123 | serge | 247 | struct drm_encoder *encoder; |
248 | |||
6084 | serge | 249 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 250 | encoder_funcs = encoder->helper_private; |
251 | /* Disable unused encoders */ |
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252 | if (encoder->crtc == NULL) |
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1963 | serge | 253 | drm_encoder_disable(encoder); |
1123 | serge | 254 | /* Disable encoders whose CRTC is about to change */ |
255 | if (encoder_funcs->get_crtc && |
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256 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) |
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1963 | serge | 257 | drm_encoder_disable(encoder); |
1123 | serge | 258 | } |
259 | } |
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260 | |||
261 | /** |
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3192 | Serge | 262 | * drm_crtc_helper_set_mode - internal helper to set a mode |
1123 | serge | 263 | * @crtc: CRTC to program |
264 | * @mode: mode to use |
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3192 | Serge | 265 | * @x: horizontal offset into the surface |
266 | * @y: vertical offset into the surface |
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267 | * @old_fb: old framebuffer, for cleanup |
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1123 | serge | 268 | * |
269 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
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3192 | Serge | 270 | * to fixup or reject the mode prior to trying to set it. This is an internal |
271 | * helper that drivers could e.g. use to update properties that require the |
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272 | * entire output pipe to be disabled and re-enabled in a new configuration. For |
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273 | * example for changing whether audio is enabled on a hdmi link or for changing |
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274 | * panel fitter or dither attributes. It is also called by the |
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275 | * drm_crtc_helper_set_config() helper function to drive the mode setting |
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276 | * sequence. |
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1123 | serge | 277 | * |
5060 | serge | 278 | * Returns: |
279 | * True if the mode was set successfully, false otherwise. |
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1123 | serge | 280 | */ |
281 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, |
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282 | struct drm_display_mode *mode, |
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283 | int x, int y, |
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284 | struct drm_framebuffer *old_fb) |
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285 | { |
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286 | struct drm_device *dev = crtc->dev; |
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6084 | serge | 287 | struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
288 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
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289 | const struct drm_encoder_helper_funcs *encoder_funcs; |
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1123 | serge | 290 | int saved_x, saved_y; |
4560 | Serge | 291 | bool saved_enabled; |
1123 | serge | 292 | struct drm_encoder *encoder; |
293 | bool ret = true; |
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294 | |||
5060 | serge | 295 | drm_warn_on_modeset_not_all_locked(dev); |
296 | |||
4560 | Serge | 297 | saved_enabled = crtc->enabled; |
1123 | serge | 298 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
299 | if (!crtc->enabled) |
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300 | return true; |
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301 | |||
1963 | serge | 302 | adjusted_mode = drm_mode_duplicate(dev, mode); |
4560 | Serge | 303 | if (!adjusted_mode) { |
304 | crtc->enabled = saved_enabled; |
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3031 | serge | 305 | return false; |
4560 | Serge | 306 | } |
1963 | serge | 307 | |
1123 | serge | 308 | saved_mode = crtc->mode; |
6084 | serge | 309 | saved_hwmode = crtc->hwmode; |
1123 | serge | 310 | saved_x = crtc->x; |
311 | saved_y = crtc->y; |
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312 | |||
313 | /* Update crtc values up front so the driver can rely on them for mode |
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314 | * setting. |
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315 | */ |
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316 | crtc->mode = *mode; |
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317 | crtc->x = x; |
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318 | crtc->y = y; |
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319 | |||
320 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
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321 | * adjust it according to limitations or connector properties, and also |
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322 | * a chance to reject the mode entirely. |
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323 | */ |
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6084 | serge | 324 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 325 | |
326 | if (encoder->crtc != crtc) |
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327 | continue; |
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4104 | Serge | 328 | |
6084 | serge | 329 | ret = drm_bridge_mode_fixup(encoder->bridge, |
330 | mode, adjusted_mode); |
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331 | if (!ret) { |
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332 | DRM_DEBUG_KMS("Bridge fixup failed\n"); |
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333 | goto done; |
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4104 | Serge | 334 | } |
335 | |||
1123 | serge | 336 | encoder_funcs = encoder->helper_private; |
7144 | serge | 337 | if (encoder_funcs->mode_fixup) { |
338 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, |
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339 | adjusted_mode))) { |
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340 | DRM_DEBUG_KMS("Encoder fixup failed\n"); |
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341 | goto done; |
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342 | } |
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1123 | serge | 343 | } |
344 | } |
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345 | |||
7144 | serge | 346 | if (crtc_funcs->mode_fixup) { |
347 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, |
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348 | adjusted_mode))) { |
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349 | DRM_DEBUG_KMS("CRTC fixup failed\n"); |
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350 | goto done; |
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351 | } |
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1123 | serge | 352 | } |
6937 | serge | 353 | DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); |
1123 | serge | 354 | |
6084 | serge | 355 | crtc->hwmode = *adjusted_mode; |
356 | |||
1123 | serge | 357 | /* Prepare the encoders and CRTCs before setting the mode. */ |
6084 | serge | 358 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 359 | |
360 | if (encoder->crtc != crtc) |
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361 | continue; |
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4104 | Serge | 362 | |
6084 | serge | 363 | drm_bridge_disable(encoder->bridge); |
4104 | Serge | 364 | |
1123 | serge | 365 | encoder_funcs = encoder->helper_private; |
366 | /* Disable the encoders as the first thing we do. */ |
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367 | encoder_funcs->prepare(encoder); |
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4104 | Serge | 368 | |
6084 | serge | 369 | drm_bridge_post_disable(encoder->bridge); |
1123 | serge | 370 | } |
371 | |||
372 | drm_crtc_prepare_encoders(dev); |
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373 | |||
374 | crtc_funcs->prepare(crtc); |
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375 | |||
376 | /* Set up the DPLL and any encoders state that needs to adjust or depend |
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377 | * on the DPLL. |
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378 | */ |
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379 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
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380 | if (!ret) |
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381 | goto done; |
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382 | |||
6084 | serge | 383 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 384 | |
385 | if (encoder->crtc != crtc) |
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386 | continue; |
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387 | |||
1963 | serge | 388 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
5060 | serge | 389 | encoder->base.id, encoder->name, |
1963 | serge | 390 | mode->base.id, mode->name); |
1123 | serge | 391 | encoder_funcs = encoder->helper_private; |
392 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); |
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4104 | Serge | 393 | |
6084 | serge | 394 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
1123 | serge | 395 | } |
396 | |||
397 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ |
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398 | crtc_funcs->commit(crtc); |
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399 | |||
6084 | serge | 400 | drm_for_each_encoder(encoder, dev) { |
1123 | serge | 401 | |
402 | if (encoder->crtc != crtc) |
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403 | continue; |
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404 | |||
6084 | serge | 405 | drm_bridge_pre_enable(encoder->bridge); |
4104 | Serge | 406 | |
1123 | serge | 407 | encoder_funcs = encoder->helper_private; |
408 | encoder_funcs->commit(encoder); |
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409 | |||
6084 | serge | 410 | drm_bridge_enable(encoder->bridge); |
1123 | serge | 411 | } |
412 | |||
1963 | serge | 413 | /* Calculate and store various constants which |
414 | * are later needed by vblank and swap-completion |
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415 | * timestamping. They are derived from true hwmode. |
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416 | */ |
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4560 | Serge | 417 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
1963 | serge | 418 | |
1123 | serge | 419 | /* FIXME: add subpixel order */ |
420 | done: |
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1963 | serge | 421 | drm_mode_destroy(dev, adjusted_mode); |
1123 | serge | 422 | if (!ret) { |
4560 | Serge | 423 | crtc->enabled = saved_enabled; |
1123 | serge | 424 | crtc->mode = saved_mode; |
6084 | serge | 425 | crtc->hwmode = saved_hwmode; |
1123 | serge | 426 | crtc->x = saved_x; |
427 | crtc->y = saved_y; |
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428 | } |
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1179 | serge | 429 | |
1123 | serge | 430 | return ret; |
431 | } |
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432 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); |
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433 | |||
5060 | serge | 434 | static void |
3031 | serge | 435 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
436 | { |
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437 | struct drm_device *dev = crtc->dev; |
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438 | struct drm_connector *connector; |
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439 | struct drm_encoder *encoder; |
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440 | |||
441 | /* Decouple all encoders and their attached connectors from this crtc */ |
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6084 | serge | 442 | drm_for_each_encoder(encoder, dev) { |
3031 | serge | 443 | if (encoder->crtc != crtc) |
444 | continue; |
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445 | |||
6084 | serge | 446 | drm_for_each_connector(connector, dev) { |
3031 | serge | 447 | if (connector->encoder != encoder) |
448 | continue; |
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449 | |||
450 | connector->encoder = NULL; |
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4560 | Serge | 451 | |
452 | /* |
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453 | * drm_helper_disable_unused_functions() ought to be |
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454 | * doing this, but since we've decoupled the encoder |
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455 | * from the connector above, the required connection |
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456 | * between them is henceforth no longer available. |
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457 | */ |
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458 | connector->dpms = DRM_MODE_DPMS_OFF; |
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3031 | serge | 459 | } |
460 | } |
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461 | |||
5060 | serge | 462 | __drm_helper_disable_unused_functions(dev); |
3031 | serge | 463 | } |
464 | |||
1123 | serge | 465 | /** |
466 | * drm_crtc_helper_set_config - set a new config from userspace |
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3192 | Serge | 467 | * @set: mode set configuration |
1123 | serge | 468 | * |
6937 | serge | 469 | * The drm_crtc_helper_set_config() helper function implements the set_config |
470 | * callback of struct &drm_crtc_funcs for drivers using the legacy CRTC helpers. |
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1123 | serge | 471 | * |
6937 | serge | 472 | * It first tries to locate the best encoder for each connector by calling the |
473 | * connector ->best_encoder() (struct &drm_connector_helper_funcs) helper |
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474 | * operation. |
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475 | * |
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476 | * After locating the appropriate encoders, the helper function will call the |
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477 | * mode_fixup encoder and CRTC helper operations to adjust the requested mode, |
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478 | * or reject it completely in which case an error will be returned to the |
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479 | * application. If the new configuration after mode adjustment is identical to |
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480 | * the current configuration the helper function will return without performing |
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481 | * any other operation. |
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482 | * |
||
483 | * If the adjusted mode is identical to the current mode but changes to the |
||
484 | * frame buffer need to be applied, the drm_crtc_helper_set_config() function |
||
485 | * will call the CRTC ->mode_set_base() (struct &drm_crtc_helper_funcs) helper |
||
486 | * operation. |
||
487 | * |
||
488 | * If the adjusted mode differs from the current mode, or if the |
||
489 | * ->mode_set_base() helper operation is not provided, the helper function |
||
490 | * performs a full mode set sequence by calling the ->prepare(), ->mode_set() |
||
491 | * and ->commit() CRTC and encoder helper operations, in that order. |
||
492 | * Alternatively it can also use the dpms and disable helper operations. For |
||
493 | * details see struct &drm_crtc_helper_funcs and struct |
||
494 | * &drm_encoder_helper_funcs. |
||
495 | * |
||
496 | * This function is deprecated. New drivers must implement atomic modeset |
||
497 | * support, for which this function is unsuitable. Instead drivers should use |
||
498 | * drm_atomic_helper_set_config(). |
||
499 | * |
||
5060 | serge | 500 | * Returns: |
501 | * Returns 0 on success, negative errno numbers on failure. |
||
1123 | serge | 502 | */ |
503 | int drm_crtc_helper_set_config(struct drm_mode_set *set) |
||
504 | { |
||
505 | struct drm_device *dev; |
||
4560 | Serge | 506 | struct drm_crtc *new_crtc; |
1179 | serge | 507 | struct drm_encoder *save_encoders, *new_encoder, *encoder; |
508 | bool mode_changed = false; /* if true do a full mode set */ |
||
509 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ |
||
510 | struct drm_connector *save_connectors, *connector; |
||
1123 | serge | 511 | int count = 0, ro, fail = 0; |
6084 | serge | 512 | const struct drm_crtc_helper_funcs *crtc_funcs; |
3031 | serge | 513 | struct drm_mode_set save_set; |
514 | int ret; |
||
1963 | serge | 515 | int i; |
1123 | serge | 516 | |
1179 | serge | 517 | DRM_DEBUG_KMS("\n"); |
1123 | serge | 518 | |
4075 | Serge | 519 | BUG_ON(!set); |
520 | BUG_ON(!set->crtc); |
||
521 | BUG_ON(!set->crtc->helper_private); |
||
1123 | serge | 522 | |
4075 | Serge | 523 | /* Enforce sane interface api - has been abused by the fb helper. */ |
524 | BUG_ON(!set->mode && set->fb); |
||
525 | BUG_ON(set->fb && set->num_connectors == 0); |
||
1123 | serge | 526 | |
527 | crtc_funcs = set->crtc->helper_private; |
||
528 | |||
1963 | serge | 529 | if (!set->mode) |
530 | set->fb = NULL; |
||
531 | |||
532 | if (set->fb) { |
||
6937 | serge | 533 | DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
534 | set->crtc->base.id, set->crtc->name, |
||
535 | set->fb->base.id, |
||
7144 | serge | 536 | (int)set->num_connectors, set->x, set->y); |
1963 | serge | 537 | } else { |
6937 | serge | 538 | DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n", |
539 | set->crtc->base.id, set->crtc->name); |
||
5060 | serge | 540 | drm_crtc_helper_disable(set->crtc); |
541 | return 0; |
||
1963 | serge | 542 | } |
1123 | serge | 543 | |
544 | dev = set->crtc->dev; |
||
545 | |||
5060 | serge | 546 | drm_warn_on_modeset_not_all_locked(dev); |
547 | |||
4560 | Serge | 548 | /* |
549 | * Allocate space for the backup of all (non-pointer) encoder and |
||
550 | * connector data. |
||
551 | */ |
||
1179 | serge | 552 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
553 | sizeof(struct drm_encoder), GFP_KERNEL); |
||
4560 | Serge | 554 | if (!save_encoders) |
1123 | serge | 555 | return -ENOMEM; |
556 | |||
1179 | serge | 557 | save_connectors = kzalloc(dev->mode_config.num_connector * |
558 | sizeof(struct drm_connector), GFP_KERNEL); |
||
559 | if (!save_connectors) { |
||
560 | kfree(save_encoders); |
||
561 | return -ENOMEM; |
||
562 | } |
||
563 | |||
4560 | Serge | 564 | /* |
565 | * Copy data. Note that driver private data is not affected. |
||
1179 | serge | 566 | * Should anything bad happen only the expected state is |
567 | * restored, not the drivers personal bookkeeping. |
||
568 | */ |
||
569 | count = 0; |
||
6084 | serge | 570 | drm_for_each_encoder(encoder, dev) { |
1179 | serge | 571 | save_encoders[count++] = *encoder; |
572 | } |
||
573 | |||
574 | count = 0; |
||
6084 | serge | 575 | drm_for_each_connector(connector, dev) { |
1179 | serge | 576 | save_connectors[count++] = *connector; |
577 | } |
||
578 | |||
3031 | serge | 579 | save_set.crtc = set->crtc; |
580 | save_set.mode = &set->crtc->mode; |
||
581 | save_set.x = set->crtc->x; |
||
582 | save_set.y = set->crtc->y; |
||
5060 | serge | 583 | save_set.fb = set->crtc->primary->fb; |
3031 | serge | 584 | |
1123 | serge | 585 | /* We should be able to check here if the fb has the same properties |
586 | * and then just flip_or_move it */ |
||
5060 | serge | 587 | if (set->crtc->primary->fb != set->fb) { |
1123 | serge | 588 | /* If we have no fb then treat it as a full mode set */ |
5060 | serge | 589 | if (set->crtc->primary->fb == NULL) { |
1179 | serge | 590 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
1123 | serge | 591 | mode_changed = true; |
3746 | Serge | 592 | } else if (set->fb->pixel_format != |
5060 | serge | 593 | set->crtc->primary->fb->pixel_format) { |
3746 | Serge | 594 | mode_changed = true; |
1430 | serge | 595 | } else |
1123 | serge | 596 | fb_changed = true; |
597 | } |
||
598 | |||
599 | if (set->x != set->crtc->x || set->y != set->crtc->y) |
||
600 | fb_changed = true; |
||
601 | |||
7144 | serge | 602 | if (!drm_mode_equal(set->mode, &set->crtc->mode)) { |
1179 | serge | 603 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
1123 | serge | 604 | drm_mode_debug_printmodeline(&set->crtc->mode); |
605 | drm_mode_debug_printmodeline(set->mode); |
||
606 | mode_changed = true; |
||
607 | } |
||
608 | |||
609 | /* a) traverse passed in connector list and get encoders for them */ |
||
610 | count = 0; |
||
6084 | serge | 611 | drm_for_each_connector(connector, dev) { |
612 | const struct drm_connector_helper_funcs *connector_funcs = |
||
1123 | serge | 613 | connector->helper_private; |
614 | new_encoder = connector->encoder; |
||
615 | for (ro = 0; ro < set->num_connectors; ro++) { |
||
616 | if (set->connectors[ro] == connector) { |
||
617 | new_encoder = connector_funcs->best_encoder(connector); |
||
618 | /* if we can't get an encoder for a connector |
||
619 | we are setting now - then fail */ |
||
620 | if (new_encoder == NULL) |
||
621 | /* don't break so fail path works correct */ |
||
622 | fail = 1; |
||
4075 | Serge | 623 | |
624 | if (connector->dpms != DRM_MODE_DPMS_ON) { |
||
625 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); |
||
626 | mode_changed = true; |
||
627 | } |
||
5060 | serge | 628 | |
629 | break; |
||
1123 | serge | 630 | } |
631 | } |
||
632 | |||
633 | if (new_encoder != connector->encoder) { |
||
1179 | serge | 634 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
1123 | serge | 635 | mode_changed = true; |
1179 | serge | 636 | /* If the encoder is reused for another connector, then |
637 | * the appropriate crtc will be set later. |
||
638 | */ |
||
639 | if (connector->encoder) |
||
640 | connector->encoder->crtc = NULL; |
||
1123 | serge | 641 | connector->encoder = new_encoder; |
642 | } |
||
643 | } |
||
644 | |||
645 | if (fail) { |
||
646 | ret = -EINVAL; |
||
1179 | serge | 647 | goto fail; |
1123 | serge | 648 | } |
649 | |||
650 | count = 0; |
||
6084 | serge | 651 | drm_for_each_connector(connector, dev) { |
1123 | serge | 652 | if (!connector->encoder) |
653 | continue; |
||
654 | |||
655 | if (connector->encoder->crtc == set->crtc) |
||
656 | new_crtc = NULL; |
||
657 | else |
||
658 | new_crtc = connector->encoder->crtc; |
||
659 | |||
660 | for (ro = 0; ro < set->num_connectors; ro++) { |
||
661 | if (set->connectors[ro] == connector) |
||
662 | new_crtc = set->crtc; |
||
663 | } |
||
664 | |||
665 | /* Make sure the new CRTC will work with the encoder */ |
||
666 | if (new_crtc && |
||
667 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { |
||
668 | ret = -EINVAL; |
||
1179 | serge | 669 | goto fail; |
1123 | serge | 670 | } |
671 | if (new_crtc != connector->encoder->crtc) { |
||
1179 | serge | 672 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
1123 | serge | 673 | mode_changed = true; |
674 | connector->encoder->crtc = new_crtc; |
||
675 | } |
||
1963 | serge | 676 | if (new_crtc) { |
6937 | serge | 677 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n", |
7144 | serge | 678 | connector->base.id, connector->name, |
6937 | serge | 679 | new_crtc->base.id, new_crtc->name); |
1963 | serge | 680 | } else { |
681 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", |
||
7144 | serge | 682 | connector->base.id, connector->name); |
1963 | serge | 683 | } |
1123 | serge | 684 | } |
685 | |||
686 | /* mode_set_base is not a required function */ |
||
687 | if (fb_changed && !crtc_funcs->mode_set_base) |
||
688 | mode_changed = true; |
||
689 | |||
690 | if (mode_changed) { |
||
4560 | Serge | 691 | if (drm_helper_crtc_in_use(set->crtc)) { |
1179 | serge | 692 | DRM_DEBUG_KMS("attempting to set mode from" |
693 | " userspace\n"); |
||
1123 | serge | 694 | drm_mode_debug_printmodeline(set->mode); |
5060 | serge | 695 | set->crtc->primary->fb = set->fb; |
1123 | serge | 696 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
697 | set->x, set->y, |
||
4560 | Serge | 698 | save_set.fb)) { |
6937 | serge | 699 | DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n", |
700 | set->crtc->base.id, set->crtc->name); |
||
5060 | serge | 701 | set->crtc->primary->fb = save_set.fb; |
1123 | serge | 702 | ret = -EINVAL; |
1179 | serge | 703 | goto fail; |
1123 | serge | 704 | } |
1963 | serge | 705 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
706 | for (i = 0; i < set->num_connectors; i++) { |
||
707 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, |
||
5060 | serge | 708 | set->connectors[i]->name); |
3031 | serge | 709 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
1963 | serge | 710 | } |
1123 | serge | 711 | } |
5060 | serge | 712 | __drm_helper_disable_unused_functions(dev); |
1123 | serge | 713 | } else if (fb_changed) { |
1179 | serge | 714 | set->crtc->x = set->x; |
715 | set->crtc->y = set->y; |
||
5060 | serge | 716 | set->crtc->primary->fb = set->fb; |
1123 | serge | 717 | ret = crtc_funcs->mode_set_base(set->crtc, |
4560 | Serge | 718 | set->x, set->y, save_set.fb); |
1963 | serge | 719 | if (ret != 0) { |
4560 | Serge | 720 | set->crtc->x = save_set.x; |
721 | set->crtc->y = save_set.y; |
||
5060 | serge | 722 | set->crtc->primary->fb = save_set.fb; |
1179 | serge | 723 | goto fail; |
6084 | serge | 724 | } |
1123 | serge | 725 | } |
726 | |||
1179 | serge | 727 | kfree(save_connectors); |
1123 | serge | 728 | kfree(save_encoders); |
729 | return 0; |
||
730 | |||
1179 | serge | 731 | fail: |
732 | /* Restore all previous data. */ |
||
1123 | serge | 733 | count = 0; |
6084 | serge | 734 | drm_for_each_encoder(encoder, dev) { |
1179 | serge | 735 | *encoder = save_encoders[count++]; |
1123 | serge | 736 | } |
1179 | serge | 737 | |
1123 | serge | 738 | count = 0; |
6084 | serge | 739 | drm_for_each_connector(connector, dev) { |
1179 | serge | 740 | *connector = save_connectors[count++]; |
1123 | serge | 741 | } |
1179 | serge | 742 | |
3031 | serge | 743 | /* Try to restore the config */ |
744 | if (mode_changed && |
||
745 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, |
||
746 | save_set.y, save_set.fb)) |
||
747 | DRM_ERROR("failed to restore config after modeset failure\n"); |
||
748 | |||
1179 | serge | 749 | kfree(save_connectors); |
1123 | serge | 750 | kfree(save_encoders); |
751 | return ret; |
||
752 | } |
||
753 | EXPORT_SYMBOL(drm_crtc_helper_set_config); |
||
754 | |||
755 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
||
756 | { |
||
757 | int dpms = DRM_MODE_DPMS_OFF; |
||
758 | struct drm_connector *connector; |
||
759 | struct drm_device *dev = encoder->dev; |
||
760 | |||
6084 | serge | 761 | drm_for_each_connector(connector, dev) |
1123 | serge | 762 | if (connector->encoder == encoder) |
763 | if (connector->dpms < dpms) |
||
764 | dpms = connector->dpms; |
||
765 | return dpms; |
||
766 | } |
||
767 | |||
4104 | Serge | 768 | /* Helper which handles bridge ordering around encoder dpms */ |
769 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) |
||
770 | { |
||
771 | struct drm_bridge *bridge = encoder->bridge; |
||
6084 | serge | 772 | const struct drm_encoder_helper_funcs *encoder_funcs; |
4104 | Serge | 773 | |
6084 | serge | 774 | if (mode == DRM_MODE_DPMS_ON) |
775 | drm_bridge_pre_enable(bridge); |
||
776 | else |
||
777 | drm_bridge_disable(bridge); |
||
4104 | Serge | 778 | |
779 | encoder_funcs = encoder->helper_private; |
||
780 | if (encoder_funcs->dpms) |
||
781 | encoder_funcs->dpms(encoder, mode); |
||
782 | |||
6084 | serge | 783 | if (mode == DRM_MODE_DPMS_ON) |
784 | drm_bridge_enable(bridge); |
||
785 | else |
||
786 | drm_bridge_post_disable(bridge); |
||
4104 | Serge | 787 | } |
788 | |||
1123 | serge | 789 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
790 | { |
||
791 | int dpms = DRM_MODE_DPMS_OFF; |
||
792 | struct drm_connector *connector; |
||
793 | struct drm_device *dev = crtc->dev; |
||
794 | |||
6084 | serge | 795 | drm_for_each_connector(connector, dev) |
1123 | serge | 796 | if (connector->encoder && connector->encoder->crtc == crtc) |
797 | if (connector->dpms < dpms) |
||
798 | dpms = connector->dpms; |
||
799 | return dpms; |
||
800 | } |
||
801 | |||
802 | /** |
||
3192 | Serge | 803 | * drm_helper_connector_dpms() - connector dpms helper implementation |
804 | * @connector: affected connector |
||
805 | * @mode: DPMS mode |
||
1123 | serge | 806 | * |
6937 | serge | 807 | * The drm_helper_connector_dpms() helper function implements the ->dpms() |
808 | * callback of struct &drm_connector_funcs for drivers using the legacy CRTC helpers. |
||
809 | * |
||
810 | * This is the main helper function provided by the CRTC helper framework for |
||
3192 | Serge | 811 | * implementing the DPMS connector attribute. It computes the new desired DPMS |
6937 | serge | 812 | * state for all encoders and CRTCs in the output mesh and calls the ->dpms() |
813 | * callbacks provided by the driver in struct &drm_crtc_helper_funcs and struct |
||
814 | * &drm_encoder_helper_funcs appropriately. |
||
6084 | serge | 815 | * |
6937 | serge | 816 | * This function is deprecated. New drivers must implement atomic modeset |
817 | * support, for which this function is unsuitable. Instead drivers should use |
||
818 | * drm_atomic_helper_connector_dpms(). |
||
819 | * |
||
6084 | serge | 820 | * Returns: |
821 | * Always returns 0. |
||
1123 | serge | 822 | */ |
6084 | serge | 823 | int drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
1123 | serge | 824 | { |
825 | struct drm_encoder *encoder = connector->encoder; |
||
826 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; |
||
4104 | Serge | 827 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
1123 | serge | 828 | |
829 | if (mode == connector->dpms) |
||
6084 | serge | 830 | return 0; |
1123 | serge | 831 | |
832 | old_dpms = connector->dpms; |
||
833 | connector->dpms = mode; |
||
834 | |||
4104 | Serge | 835 | if (encoder) |
836 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); |
||
837 | |||
1123 | serge | 838 | /* from off to on, do crtc then encoder */ |
839 | if (mode < old_dpms) { |
||
840 | if (crtc) { |
||
6084 | serge | 841 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
1123 | serge | 842 | if (crtc_funcs->dpms) |
843 | (*crtc_funcs->dpms) (crtc, |
||
844 | drm_helper_choose_crtc_dpms(crtc)); |
||
845 | } |
||
4104 | Serge | 846 | if (encoder) |
847 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1123 | serge | 848 | } |
849 | |||
850 | /* from on to off, do encoder then crtc */ |
||
851 | if (mode > old_dpms) { |
||
4104 | Serge | 852 | if (encoder) |
853 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1123 | serge | 854 | if (crtc) { |
6084 | serge | 855 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
1123 | serge | 856 | if (crtc_funcs->dpms) |
857 | (*crtc_funcs->dpms) (crtc, |
||
858 | drm_helper_choose_crtc_dpms(crtc)); |
||
859 | } |
||
860 | } |
||
861 | |||
6084 | serge | 862 | return 0; |
1123 | serge | 863 | } |
864 | EXPORT_SYMBOL(drm_helper_connector_dpms); |
||
865 | |||
5060 | serge | 866 | /** |
867 | * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata |
||
868 | * @fb: drm_framebuffer object to fill out |
||
869 | * @mode_cmd: metadata from the userspace fb creation request |
||
870 | * |
||
871 | * This helper can be used in a drivers fb_create callback to pre-fill the fb's |
||
872 | * metadata fields. |
||
873 | */ |
||
874 | void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
||
6937 | serge | 875 | const struct drm_mode_fb_cmd2 *mode_cmd) |
1123 | serge | 876 | { |
3031 | serge | 877 | int i; |
878 | |||
1123 | serge | 879 | fb->width = mode_cmd->width; |
880 | fb->height = mode_cmd->height; |
||
3031 | serge | 881 | for (i = 0; i < 4; i++) { |
882 | fb->pitches[i] = mode_cmd->pitches[i]; |
||
883 | fb->offsets[i] = mode_cmd->offsets[i]; |
||
6084 | serge | 884 | fb->modifier[i] = mode_cmd->modifier[i]; |
3031 | serge | 885 | } |
886 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
||
887 | &fb->bits_per_pixel); |
||
888 | fb->pixel_format = mode_cmd->pixel_format; |
||
5060 | serge | 889 | fb->flags = mode_cmd->flags; |
1123 | serge | 890 | } |
891 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); |
||
892 | |||
5060 | serge | 893 | /** |
894 | * drm_helper_resume_force_mode - force-restore mode setting configuration |
||
895 | * @dev: drm_device which should be restored |
||
896 | * |
||
897 | * Drivers which use the mode setting helpers can use this function to |
||
898 | * force-restore the mode setting configuration e.g. on resume or when something |
||
899 | * else might have trampled over the hw state (like some overzealous old BIOSen |
||
900 | * tended to do). |
||
901 | * |
||
902 | * This helper doesn't provide a error return value since restoring the old |
||
903 | * config should never fail due to resource allocation issues since the driver |
||
904 | * has successfully set the restored configuration already. Hence this should |
||
905 | * boil down to the equivalent of a few dpms on calls, which also don't provide |
||
906 | * an error code. |
||
907 | * |
||
908 | * Drivers where simply restoring an old configuration again might fail (e.g. |
||
909 | * due to slight differences in allocating shared resources when the |
||
910 | * configuration is restored in a different order than when userspace set it up) |
||
911 | * need to use their own restore logic. |
||
6937 | serge | 912 | * |
913 | * This function is deprecated. New drivers should implement atomic mode- |
||
914 | * setting and use the atomic suspend/resume helpers. |
||
915 | * |
||
916 | * See also: |
||
917 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() |
||
5060 | serge | 918 | */ |
919 | void drm_helper_resume_force_mode(struct drm_device *dev) |
||
1123 | serge | 920 | { |
921 | struct drm_crtc *crtc; |
||
1404 | serge | 922 | struct drm_encoder *encoder; |
6084 | serge | 923 | const struct drm_crtc_helper_funcs *crtc_funcs; |
5060 | serge | 924 | int encoder_dpms; |
925 | bool ret; |
||
1123 | serge | 926 | |
5060 | serge | 927 | drm_modeset_lock_all(dev); |
6084 | serge | 928 | drm_for_each_crtc(crtc, dev) { |
1123 | serge | 929 | |
6084 | serge | 930 | if (!crtc->enabled) |
931 | continue; |
||
1123 | serge | 932 | |
1179 | serge | 933 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
5060 | serge | 934 | crtc->x, crtc->y, crtc->primary->fb); |
1123 | serge | 935 | |
5060 | serge | 936 | /* Restoring the old config should never fail! */ |
1123 | serge | 937 | if (ret == false) |
938 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); |
||
1404 | serge | 939 | |
940 | /* Turn off outputs that were already powered off */ |
||
941 | if (drm_helper_choose_crtc_dpms(crtc)) { |
||
6084 | serge | 942 | drm_for_each_encoder(encoder, dev) { |
1404 | serge | 943 | |
944 | if(encoder->crtc != crtc) |
||
945 | continue; |
||
946 | |||
4104 | Serge | 947 | encoder_dpms = drm_helper_choose_encoder_dpms( |
948 | encoder); |
||
949 | |||
950 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1963 | serge | 951 | } |
1404 | serge | 952 | |
6084 | serge | 953 | crtc_funcs = crtc->helper_private; |
954 | if (crtc_funcs->dpms) |
||
955 | (*crtc_funcs->dpms) (crtc, |
||
956 | drm_helper_choose_crtc_dpms(crtc)); |
||
1404 | serge | 957 | } |
6084 | serge | 958 | } |
5060 | serge | 959 | |
1179 | serge | 960 | /* disable the unused connectors while restoring the modesetting */ |
5060 | serge | 961 | __drm_helper_disable_unused_functions(dev); |
962 | drm_modeset_unlock_all(dev); |
||
1123 | serge | 963 | } |
964 | EXPORT_SYMBOL(drm_helper_resume_force_mode); |
||
5271 | serge | 965 | |
966 | /** |
||
967 | * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers |
||
968 | * @crtc: DRM CRTC |
||
969 | * @mode: DRM display mode which userspace requested |
||
970 | * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks |
||
971 | * @x: x offset of the CRTC scanout area on the underlying framebuffer |
||
972 | * @y: y offset of the CRTC scanout area on the underlying framebuffer |
||
973 | * @old_fb: previous framebuffer |
||
974 | * |
||
975 | * This function implements a callback useable as the ->mode_set callback |
||
6937 | serge | 976 | * required by the CRTC helpers. Besides the atomic plane helper functions for |
5271 | serge | 977 | * the primary plane the driver must also provide the ->mode_set_nofb callback |
6937 | serge | 978 | * to set up the CRTC. |
5271 | serge | 979 | * |
980 | * This is a transitional helper useful for converting drivers to the atomic |
||
981 | * interfaces. |
||
982 | */ |
||
983 | int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, |
||
984 | struct drm_display_mode *adjusted_mode, int x, int y, |
||
985 | struct drm_framebuffer *old_fb) |
||
986 | { |
||
987 | struct drm_crtc_state *crtc_state; |
||
6084 | serge | 988 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
5271 | serge | 989 | int ret; |
990 | |||
991 | if (crtc->funcs->atomic_duplicate_state) |
||
992 | crtc_state = crtc->funcs->atomic_duplicate_state(crtc); |
||
6084 | serge | 993 | else { |
994 | if (!crtc->state) |
||
995 | drm_atomic_helper_crtc_reset(crtc); |
||
996 | |||
997 | crtc_state = drm_atomic_helper_crtc_duplicate_state(crtc); |
||
998 | } |
||
999 | |||
5271 | serge | 1000 | if (!crtc_state) |
1001 | return -ENOMEM; |
||
1002 | |||
1003 | crtc_state->planes_changed = true; |
||
1004 | crtc_state->mode_changed = true; |
||
6084 | serge | 1005 | ret = drm_atomic_set_mode_for_crtc(crtc_state, mode); |
1006 | if (ret) |
||
1007 | goto out; |
||
5271 | serge | 1008 | drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode); |
1009 | |||
1010 | if (crtc_funcs->atomic_check) { |
||
1011 | ret = crtc_funcs->atomic_check(crtc, crtc_state); |
||
6084 | serge | 1012 | if (ret) |
1013 | goto out; |
||
5271 | serge | 1014 | } |
1015 | |||
1016 | swap(crtc->state, crtc_state); |
||
1017 | |||
1018 | crtc_funcs->mode_set_nofb(crtc); |
||
1019 | |||
6084 | serge | 1020 | ret = drm_helper_crtc_mode_set_base(crtc, x, y, old_fb); |
1021 | |||
1022 | out: |
||
5271 | serge | 1023 | if (crtc_state) { |
1024 | if (crtc->funcs->atomic_destroy_state) |
||
1025 | crtc->funcs->atomic_destroy_state(crtc, crtc_state); |
||
1026 | else |
||
6084 | serge | 1027 | drm_atomic_helper_crtc_destroy_state(crtc, crtc_state); |
5271 | serge | 1028 | } |
1029 | |||
6084 | serge | 1030 | return ret; |
5271 | serge | 1031 | } |
1032 | EXPORT_SYMBOL(drm_helper_crtc_mode_set); |
||
1033 | |||
1034 | /** |
||
1035 | * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers |
||
1036 | * @crtc: DRM CRTC |
||
1037 | * @x: x offset of the CRTC scanout area on the underlying framebuffer |
||
1038 | * @y: y offset of the CRTC scanout area on the underlying framebuffer |
||
1039 | * @old_fb: previous framebuffer |
||
1040 | * |
||
1041 | * This function implements a callback useable as the ->mode_set_base used |
||
6937 | serge | 1042 | * required by the CRTC helpers. The driver must provide the atomic plane helper |
5271 | serge | 1043 | * functions for the primary plane. |
1044 | * |
||
1045 | * This is a transitional helper useful for converting drivers to the atomic |
||
1046 | * interfaces. |
||
1047 | */ |
||
1048 | int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, |
||
1049 | struct drm_framebuffer *old_fb) |
||
1050 | { |
||
1051 | struct drm_plane_state *plane_state; |
||
1052 | struct drm_plane *plane = crtc->primary; |
||
1053 | |||
1054 | if (plane->funcs->atomic_duplicate_state) |
||
1055 | plane_state = plane->funcs->atomic_duplicate_state(plane); |
||
1056 | else if (plane->state) |
||
1057 | plane_state = drm_atomic_helper_plane_duplicate_state(plane); |
||
1058 | else |
||
1059 | plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL); |
||
1060 | if (!plane_state) |
||
1061 | return -ENOMEM; |
||
6084 | serge | 1062 | plane_state->plane = plane; |
5271 | serge | 1063 | |
1064 | plane_state->crtc = crtc; |
||
1065 | drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb); |
||
1066 | plane_state->crtc_x = 0; |
||
1067 | plane_state->crtc_y = 0; |
||
1068 | plane_state->crtc_h = crtc->mode.vdisplay; |
||
1069 | plane_state->crtc_w = crtc->mode.hdisplay; |
||
1070 | plane_state->src_x = x << 16; |
||
1071 | plane_state->src_y = y << 16; |
||
1072 | plane_state->src_h = crtc->mode.vdisplay << 16; |
||
1073 | plane_state->src_w = crtc->mode.hdisplay << 16; |
||
1074 | |||
1075 | return drm_plane_helper_commit(plane, plane_state, old_fb); |
||
1076 | } |
||
1077 | EXPORT_SYMBOL(drm_helper_crtc_mode_set_base); |
||
7144 | serge | 1078 | |
1079 | /** |
||
1080 | * drm_helper_crtc_enable_color_mgmt - enable color management properties |
||
1081 | * @crtc: DRM CRTC |
||
1082 | * @degamma_lut_size: the size of the degamma lut (before CSC) |
||
1083 | * @gamma_lut_size: the size of the gamma lut (after CSC) |
||
1084 | * |
||
1085 | * This function lets the driver enable the color correction properties on a |
||
1086 | * CRTC. This includes 3 degamma, csc and gamma properties that userspace can |
||
1087 | * set and 2 size properties to inform the userspace of the lut sizes. |
||
1088 | */ |
||
1089 | void drm_helper_crtc_enable_color_mgmt(struct drm_crtc *crtc, |
||
1090 | int degamma_lut_size, |
||
1091 | int gamma_lut_size) |
||
1092 | { |
||
1093 | struct drm_device *dev = crtc->dev; |
||
1094 | struct drm_mode_config *config = &dev->mode_config; |
||
1095 | |||
1096 | drm_object_attach_property(&crtc->base, |
||
1097 | config->degamma_lut_property, 0); |
||
1098 | drm_object_attach_property(&crtc->base, |
||
1099 | config->ctm_property, 0); |
||
1100 | drm_object_attach_property(&crtc->base, |
||
1101 | config->gamma_lut_property, 0); |
||
1102 | |||
1103 | drm_object_attach_property(&crtc->base, |
||
1104 | config->degamma_lut_size_property, |
||
1105 | degamma_lut_size); |
||
1106 | drm_object_attach_property(&crtc->base, |
||
1107 | config->gamma_lut_size_property, |
||
1108 | gamma_lut_size); |
||
1109 | } |
||
1110 | EXPORT_SYMBOL(drm_helper_crtc_enable_color_mgmt);><>><>><>><>>>>>>>> |