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