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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 |
37 | #include |
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38 | #include |
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39 | #include |
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40 | #include |
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41 | #include |
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42 | |||
4560 | Serge | 43 | MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
44 | MODULE_DESCRIPTION("DRM KMS helper"); |
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45 | MODULE_LICENSE("GPL and additional rights"); |
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46 | |||
3192 | Serge | 47 | /** |
48 | * drm_helper_move_panel_connectors_to_head() - move panels to the front in the |
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49 | * connector list |
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50 | * @dev: drm device to operate on |
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51 | * |
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52 | * Some userspace presumes that the first connected connector is the main |
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53 | * display, where it's supposed to display e.g. the login screen. For |
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54 | * laptops, this should be the main panel. Use this function to sort all |
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55 | * (eDP/LVDS) panels to the front of the connector list, instead of |
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56 | * painstakingly trying to initialize them in the right order. |
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57 | */ |
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58 | void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) |
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59 | { |
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60 | struct drm_connector *connector, *tmp; |
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61 | struct list_head panel_list; |
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62 | |||
63 | INIT_LIST_HEAD(&panel_list); |
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64 | |||
65 | list_for_each_entry_safe(connector, tmp, |
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66 | &dev->mode_config.connector_list, head) { |
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67 | if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || |
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68 | connector->connector_type == DRM_MODE_CONNECTOR_eDP) |
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69 | list_move_tail(&connector->head, &panel_list); |
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70 | } |
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71 | |||
72 | list_splice(&panel_list, &dev->mode_config.connector_list); |
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73 | } |
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74 | EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); |
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75 | |||
1123 | serge | 76 | /** |
77 | * drm_helper_encoder_in_use - check if a given encoder is in use |
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78 | * @encoder: encoder to check |
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79 | * |
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5060 | serge | 80 | * Checks whether @encoder is with the current mode setting output configuration |
81 | * in use by any connector. This doesn't mean that it is actually enabled since |
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82 | * the DPMS state is tracked separately. |
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1123 | serge | 83 | * |
5060 | serge | 84 | * Returns: |
85 | * True if @encoder is used, false otherwise. |
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1123 | serge | 86 | */ |
87 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) |
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88 | { |
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89 | struct drm_connector *connector; |
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90 | struct drm_device *dev = encoder->dev; |
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91 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
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92 | if (connector->encoder == encoder) |
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93 | return true; |
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94 | return false; |
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95 | } |
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96 | EXPORT_SYMBOL(drm_helper_encoder_in_use); |
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97 | |||
98 | /** |
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99 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config |
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100 | * @crtc: CRTC to check |
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101 | * |
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5060 | serge | 102 | * Checks whether @crtc is with the current mode setting output configuration |
103 | * in use by any connector. This doesn't mean that it is actually enabled since |
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104 | * the DPMS state is tracked separately. |
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1123 | serge | 105 | * |
5060 | serge | 106 | * Returns: |
107 | * True if @crtc is used, false otherwise. |
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1123 | serge | 108 | */ |
109 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) |
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110 | { |
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111 | struct drm_encoder *encoder; |
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112 | struct drm_device *dev = crtc->dev; |
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113 | /* FIXME: Locking around list access? */ |
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114 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
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115 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
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116 | return true; |
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117 | return false; |
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118 | } |
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119 | EXPORT_SYMBOL(drm_helper_crtc_in_use); |
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120 | |||
1963 | serge | 121 | static void |
122 | drm_encoder_disable(struct drm_encoder *encoder) |
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123 | { |
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124 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
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125 | |||
4104 | Serge | 126 | if (encoder->bridge) |
127 | encoder->bridge->funcs->disable(encoder->bridge); |
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128 | |||
1963 | serge | 129 | if (encoder_funcs->disable) |
130 | (*encoder_funcs->disable)(encoder); |
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131 | else |
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132 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
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4104 | Serge | 133 | |
134 | if (encoder->bridge) |
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135 | encoder->bridge->funcs->post_disable(encoder->bridge); |
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1963 | serge | 136 | } |
137 | |||
5060 | serge | 138 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
1123 | serge | 139 | { |
140 | struct drm_encoder *encoder; |
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141 | struct drm_crtc *crtc; |
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142 | |||
5060 | serge | 143 | drm_warn_on_modeset_not_all_locked(dev); |
1179 | serge | 144 | |
1123 | serge | 145 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
1179 | serge | 146 | if (!drm_helper_encoder_in_use(encoder)) { |
1963 | serge | 147 | drm_encoder_disable(encoder); |
5060 | serge | 148 | /* disconnect encoder from any connector */ |
1179 | serge | 149 | encoder->crtc = NULL; |
150 | } |
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1123 | serge | 151 | } |
152 | |||
153 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
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154 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
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155 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
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156 | if (!crtc->enabled) { |
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1963 | serge | 157 | if (crtc_funcs->disable) |
158 | (*crtc_funcs->disable)(crtc); |
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159 | else |
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160 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); |
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5060 | serge | 161 | crtc->primary->fb = NULL; |
1123 | serge | 162 | } |
163 | } |
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164 | } |
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5060 | serge | 165 | |
166 | /** |
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167 | * drm_helper_disable_unused_functions - disable unused objects |
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168 | * @dev: DRM device |
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169 | * |
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170 | * This function walks through the entire mode setting configuration of @dev. It |
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171 | * will remove any crtc links of unused encoders and encoder links of |
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172 | * disconnected connectors. Then it will disable all unused encoders and crtcs |
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173 | * either by calling their disable callback if available or by calling their |
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174 | * dpms callback with DRM_MODE_DPMS_OFF. |
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175 | */ |
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176 | void drm_helper_disable_unused_functions(struct drm_device *dev) |
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177 | { |
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178 | drm_modeset_lock_all(dev); |
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179 | __drm_helper_disable_unused_functions(dev); |
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180 | drm_modeset_unlock_all(dev); |
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181 | } |
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1123 | serge | 182 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
183 | |||
184 | /* |
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185 | * Check the CRTC we're going to map each output to vs. its current |
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186 | * CRTC. If they don't match, we have to disable the output and the CRTC |
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187 | * since the driver will have to re-route things. |
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188 | */ |
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189 | static void |
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190 | drm_crtc_prepare_encoders(struct drm_device *dev) |
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191 | { |
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192 | struct drm_encoder_helper_funcs *encoder_funcs; |
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193 | struct drm_encoder *encoder; |
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194 | |||
195 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
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196 | encoder_funcs = encoder->helper_private; |
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197 | /* Disable unused encoders */ |
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198 | if (encoder->crtc == NULL) |
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1963 | serge | 199 | drm_encoder_disable(encoder); |
1123 | serge | 200 | /* Disable encoders whose CRTC is about to change */ |
201 | if (encoder_funcs->get_crtc && |
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202 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) |
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1963 | serge | 203 | drm_encoder_disable(encoder); |
1123 | serge | 204 | } |
205 | } |
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206 | |||
207 | /** |
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3192 | Serge | 208 | * drm_crtc_helper_set_mode - internal helper to set a mode |
1123 | serge | 209 | * @crtc: CRTC to program |
210 | * @mode: mode to use |
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3192 | Serge | 211 | * @x: horizontal offset into the surface |
212 | * @y: vertical offset into the surface |
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213 | * @old_fb: old framebuffer, for cleanup |
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1123 | serge | 214 | * |
215 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
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3192 | Serge | 216 | * to fixup or reject the mode prior to trying to set it. This is an internal |
217 | * helper that drivers could e.g. use to update properties that require the |
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218 | * entire output pipe to be disabled and re-enabled in a new configuration. For |
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219 | * example for changing whether audio is enabled on a hdmi link or for changing |
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220 | * panel fitter or dither attributes. It is also called by the |
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221 | * drm_crtc_helper_set_config() helper function to drive the mode setting |
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222 | * sequence. |
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1123 | serge | 223 | * |
5060 | serge | 224 | * Returns: |
225 | * True if the mode was set successfully, false otherwise. |
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1123 | serge | 226 | */ |
227 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, |
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228 | struct drm_display_mode *mode, |
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229 | int x, int y, |
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230 | struct drm_framebuffer *old_fb) |
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231 | { |
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232 | struct drm_device *dev = crtc->dev; |
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4560 | Serge | 233 | struct drm_display_mode *adjusted_mode, saved_mode; |
1123 | serge | 234 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
235 | struct drm_encoder_helper_funcs *encoder_funcs; |
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236 | int saved_x, saved_y; |
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4560 | Serge | 237 | bool saved_enabled; |
1123 | serge | 238 | struct drm_encoder *encoder; |
239 | bool ret = true; |
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240 | |||
5060 | serge | 241 | drm_warn_on_modeset_not_all_locked(dev); |
242 | |||
4560 | Serge | 243 | saved_enabled = crtc->enabled; |
1123 | serge | 244 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
245 | if (!crtc->enabled) |
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246 | return true; |
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247 | |||
1963 | serge | 248 | adjusted_mode = drm_mode_duplicate(dev, mode); |
4560 | Serge | 249 | if (!adjusted_mode) { |
250 | crtc->enabled = saved_enabled; |
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3031 | serge | 251 | return false; |
4560 | Serge | 252 | } |
1963 | serge | 253 | |
1123 | serge | 254 | saved_mode = crtc->mode; |
255 | saved_x = crtc->x; |
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256 | saved_y = crtc->y; |
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257 | |||
258 | /* Update crtc values up front so the driver can rely on them for mode |
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259 | * setting. |
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260 | */ |
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261 | crtc->mode = *mode; |
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262 | crtc->x = x; |
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263 | crtc->y = y; |
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264 | |||
265 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
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266 | * adjust it according to limitations or connector properties, and also |
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267 | * a chance to reject the mode entirely. |
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268 | */ |
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269 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
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270 | |||
271 | if (encoder->crtc != crtc) |
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272 | continue; |
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4104 | Serge | 273 | |
274 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { |
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275 | ret = encoder->bridge->funcs->mode_fixup( |
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276 | encoder->bridge, mode, adjusted_mode); |
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277 | if (!ret) { |
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278 | DRM_DEBUG_KMS("Bridge fixup failed\n"); |
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279 | goto done; |
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280 | } |
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281 | } |
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282 | |||
1123 | serge | 283 | encoder_funcs = encoder->helper_private; |
284 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, |
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285 | adjusted_mode))) { |
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3031 | serge | 286 | DRM_DEBUG_KMS("Encoder fixup failed\n"); |
1123 | serge | 287 | goto done; |
288 | } |
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289 | } |
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290 | |||
291 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { |
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3031 | serge | 292 | DRM_DEBUG_KMS("CRTC fixup failed\n"); |
1123 | serge | 293 | goto done; |
294 | } |
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1963 | serge | 295 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
1123 | serge | 296 | |
297 | /* Prepare the encoders and CRTCs before setting the mode. */ |
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298 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
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299 | |||
300 | if (encoder->crtc != crtc) |
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301 | continue; |
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4104 | Serge | 302 | |
303 | if (encoder->bridge) |
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304 | encoder->bridge->funcs->disable(encoder->bridge); |
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305 | |||
1123 | serge | 306 | encoder_funcs = encoder->helper_private; |
307 | /* Disable the encoders as the first thing we do. */ |
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308 | encoder_funcs->prepare(encoder); |
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4104 | Serge | 309 | |
310 | if (encoder->bridge) |
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311 | encoder->bridge->funcs->post_disable(encoder->bridge); |
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1123 | serge | 312 | } |
313 | |||
314 | drm_crtc_prepare_encoders(dev); |
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315 | |||
316 | crtc_funcs->prepare(crtc); |
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317 | |||
318 | /* Set up the DPLL and any encoders state that needs to adjust or depend |
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319 | * on the DPLL. |
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320 | */ |
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321 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
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322 | if (!ret) |
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323 | goto done; |
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324 | |||
325 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
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326 | |||
327 | if (encoder->crtc != crtc) |
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328 | continue; |
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329 | |||
1963 | serge | 330 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
5060 | serge | 331 | encoder->base.id, encoder->name, |
1963 | serge | 332 | mode->base.id, mode->name); |
1123 | serge | 333 | encoder_funcs = encoder->helper_private; |
334 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); |
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4104 | Serge | 335 | |
336 | if (encoder->bridge && encoder->bridge->funcs->mode_set) |
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337 | encoder->bridge->funcs->mode_set(encoder->bridge, mode, |
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338 | adjusted_mode); |
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1123 | serge | 339 | } |
340 | |||
341 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ |
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342 | crtc_funcs->commit(crtc); |
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343 | |||
344 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
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345 | |||
346 | if (encoder->crtc != crtc) |
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347 | continue; |
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348 | |||
4104 | Serge | 349 | if (encoder->bridge) |
350 | encoder->bridge->funcs->pre_enable(encoder->bridge); |
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351 | |||
1123 | serge | 352 | encoder_funcs = encoder->helper_private; |
353 | encoder_funcs->commit(encoder); |
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354 | |||
4104 | Serge | 355 | if (encoder->bridge) |
356 | encoder->bridge->funcs->enable(encoder->bridge); |
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1123 | serge | 357 | } |
358 | |||
1963 | serge | 359 | /* Store real post-adjustment hardware mode. */ |
360 | crtc->hwmode = *adjusted_mode; |
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361 | |||
362 | /* Calculate and store various constants which |
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363 | * are later needed by vblank and swap-completion |
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364 | * timestamping. They are derived from true hwmode. |
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365 | */ |
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4560 | Serge | 366 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
1963 | serge | 367 | |
1123 | serge | 368 | /* FIXME: add subpixel order */ |
369 | done: |
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1963 | serge | 370 | drm_mode_destroy(dev, adjusted_mode); |
1123 | serge | 371 | if (!ret) { |
4560 | Serge | 372 | crtc->enabled = saved_enabled; |
1123 | serge | 373 | crtc->mode = saved_mode; |
374 | crtc->x = saved_x; |
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375 | crtc->y = saved_y; |
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376 | } |
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1179 | serge | 377 | |
1123 | serge | 378 | return ret; |
379 | } |
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380 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); |
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381 | |||
5060 | serge | 382 | static void |
3031 | serge | 383 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
384 | { |
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385 | struct drm_device *dev = crtc->dev; |
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386 | struct drm_connector *connector; |
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387 | struct drm_encoder *encoder; |
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388 | |||
389 | /* Decouple all encoders and their attached connectors from this crtc */ |
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390 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
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391 | if (encoder->crtc != crtc) |
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392 | continue; |
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393 | |||
394 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
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395 | if (connector->encoder != encoder) |
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396 | continue; |
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397 | |||
398 | connector->encoder = NULL; |
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4560 | Serge | 399 | |
400 | /* |
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401 | * drm_helper_disable_unused_functions() ought to be |
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402 | * doing this, but since we've decoupled the encoder |
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403 | * from the connector above, the required connection |
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404 | * between them is henceforth no longer available. |
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405 | */ |
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406 | connector->dpms = DRM_MODE_DPMS_OFF; |
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3031 | serge | 407 | } |
408 | } |
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409 | |||
5060 | serge | 410 | __drm_helper_disable_unused_functions(dev); |
3031 | serge | 411 | } |
412 | |||
1123 | serge | 413 | /** |
414 | * drm_crtc_helper_set_config - set a new config from userspace |
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3192 | Serge | 415 | * @set: mode set configuration |
1123 | serge | 416 | * |
3192 | Serge | 417 | * Setup a new configuration, provided by the upper layers (either an ioctl call |
5060 | serge | 418 | * from userspace or internally e.g. from the fbdev support code) in @set, and |
3192 | Serge | 419 | * enable it. This is the main helper functions for drivers that implement |
420 | * kernel mode setting with the crtc helper functions and the assorted |
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421 | * ->prepare(), ->modeset() and ->commit() helper callbacks. |
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1123 | serge | 422 | * |
5060 | serge | 423 | * Returns: |
424 | * Returns 0 on success, negative errno numbers on failure. |
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1123 | serge | 425 | */ |
426 | int drm_crtc_helper_set_config(struct drm_mode_set *set) |
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427 | { |
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428 | struct drm_device *dev; |
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4560 | Serge | 429 | struct drm_crtc *new_crtc; |
1179 | serge | 430 | struct drm_encoder *save_encoders, *new_encoder, *encoder; |
431 | bool mode_changed = false; /* if true do a full mode set */ |
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432 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ |
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433 | struct drm_connector *save_connectors, *connector; |
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1123 | serge | 434 | int count = 0, ro, fail = 0; |
435 | struct drm_crtc_helper_funcs *crtc_funcs; |
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3031 | serge | 436 | struct drm_mode_set save_set; |
437 | int ret; |
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1963 | serge | 438 | int i; |
1123 | serge | 439 | |
1179 | serge | 440 | DRM_DEBUG_KMS("\n"); |
1123 | serge | 441 | |
4075 | Serge | 442 | BUG_ON(!set); |
443 | BUG_ON(!set->crtc); |
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444 | BUG_ON(!set->crtc->helper_private); |
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1123 | serge | 445 | |
4075 | Serge | 446 | /* Enforce sane interface api - has been abused by the fb helper. */ |
447 | BUG_ON(!set->mode && set->fb); |
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448 | BUG_ON(set->fb && set->num_connectors == 0); |
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1123 | serge | 449 | |
450 | crtc_funcs = set->crtc->helper_private; |
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451 | |||
1963 | serge | 452 | if (!set->mode) |
453 | set->fb = NULL; |
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454 | |||
455 | if (set->fb) { |
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456 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
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457 | set->crtc->base.id, set->fb->base.id, |
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1123 | serge | 458 | (int)set->num_connectors, set->x, set->y); |
1963 | serge | 459 | } else { |
460 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); |
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5060 | serge | 461 | drm_crtc_helper_disable(set->crtc); |
462 | return 0; |
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1963 | serge | 463 | } |
1123 | serge | 464 | |
465 | dev = set->crtc->dev; |
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466 | |||
5060 | serge | 467 | drm_warn_on_modeset_not_all_locked(dev); |
468 | |||
4560 | Serge | 469 | /* |
470 | * Allocate space for the backup of all (non-pointer) encoder and |
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471 | * connector data. |
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472 | */ |
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1179 | serge | 473 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
474 | sizeof(struct drm_encoder), GFP_KERNEL); |
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4560 | Serge | 475 | if (!save_encoders) |
1123 | serge | 476 | return -ENOMEM; |
477 | |||
1179 | serge | 478 | save_connectors = kzalloc(dev->mode_config.num_connector * |
479 | sizeof(struct drm_connector), GFP_KERNEL); |
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480 | if (!save_connectors) { |
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481 | kfree(save_encoders); |
||
482 | return -ENOMEM; |
||
483 | } |
||
484 | |||
4560 | Serge | 485 | /* |
486 | * Copy data. Note that driver private data is not affected. |
||
1179 | serge | 487 | * Should anything bad happen only the expected state is |
488 | * restored, not the drivers personal bookkeeping. |
||
489 | */ |
||
490 | count = 0; |
||
491 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
||
492 | save_encoders[count++] = *encoder; |
||
493 | } |
||
494 | |||
495 | count = 0; |
||
496 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
||
497 | save_connectors[count++] = *connector; |
||
498 | } |
||
499 | |||
3031 | serge | 500 | save_set.crtc = set->crtc; |
501 | save_set.mode = &set->crtc->mode; |
||
502 | save_set.x = set->crtc->x; |
||
503 | save_set.y = set->crtc->y; |
||
5060 | serge | 504 | save_set.fb = set->crtc->primary->fb; |
3031 | serge | 505 | |
1123 | serge | 506 | /* We should be able to check here if the fb has the same properties |
507 | * and then just flip_or_move it */ |
||
5060 | serge | 508 | if (set->crtc->primary->fb != set->fb) { |
1123 | serge | 509 | /* If we have no fb then treat it as a full mode set */ |
5060 | serge | 510 | if (set->crtc->primary->fb == NULL) { |
1179 | serge | 511 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
1123 | serge | 512 | mode_changed = true; |
1179 | serge | 513 | } else if (set->fb == NULL) { |
514 | mode_changed = true; |
||
3746 | Serge | 515 | } else if (set->fb->pixel_format != |
5060 | serge | 516 | set->crtc->primary->fb->pixel_format) { |
3746 | Serge | 517 | mode_changed = true; |
1430 | serge | 518 | } else |
1123 | serge | 519 | fb_changed = true; |
520 | } |
||
521 | |||
522 | if (set->x != set->crtc->x || set->y != set->crtc->y) |
||
523 | fb_changed = true; |
||
524 | |||
525 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { |
||
1179 | serge | 526 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
1123 | serge | 527 | drm_mode_debug_printmodeline(&set->crtc->mode); |
528 | drm_mode_debug_printmodeline(set->mode); |
||
529 | mode_changed = true; |
||
530 | } |
||
531 | |||
532 | /* a) traverse passed in connector list and get encoders for them */ |
||
533 | count = 0; |
||
534 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
||
535 | struct drm_connector_helper_funcs *connector_funcs = |
||
536 | connector->helper_private; |
||
537 | new_encoder = connector->encoder; |
||
538 | for (ro = 0; ro < set->num_connectors; ro++) { |
||
539 | if (set->connectors[ro] == connector) { |
||
540 | new_encoder = connector_funcs->best_encoder(connector); |
||
541 | /* if we can't get an encoder for a connector |
||
542 | we are setting now - then fail */ |
||
543 | if (new_encoder == NULL) |
||
544 | /* don't break so fail path works correct */ |
||
545 | fail = 1; |
||
4075 | Serge | 546 | |
547 | if (connector->dpms != DRM_MODE_DPMS_ON) { |
||
548 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); |
||
549 | mode_changed = true; |
||
550 | } |
||
5060 | serge | 551 | |
552 | break; |
||
1123 | serge | 553 | } |
554 | } |
||
555 | |||
556 | if (new_encoder != connector->encoder) { |
||
1179 | serge | 557 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
1123 | serge | 558 | mode_changed = true; |
1179 | serge | 559 | /* If the encoder is reused for another connector, then |
560 | * the appropriate crtc will be set later. |
||
561 | */ |
||
562 | if (connector->encoder) |
||
563 | connector->encoder->crtc = NULL; |
||
1123 | serge | 564 | connector->encoder = new_encoder; |
565 | } |
||
566 | } |
||
567 | |||
568 | if (fail) { |
||
569 | ret = -EINVAL; |
||
1179 | serge | 570 | goto fail; |
1123 | serge | 571 | } |
572 | |||
573 | count = 0; |
||
574 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
||
575 | if (!connector->encoder) |
||
576 | continue; |
||
577 | |||
578 | if (connector->encoder->crtc == set->crtc) |
||
579 | new_crtc = NULL; |
||
580 | else |
||
581 | new_crtc = connector->encoder->crtc; |
||
582 | |||
583 | for (ro = 0; ro < set->num_connectors; ro++) { |
||
584 | if (set->connectors[ro] == connector) |
||
585 | new_crtc = set->crtc; |
||
586 | } |
||
587 | |||
588 | /* Make sure the new CRTC will work with the encoder */ |
||
589 | if (new_crtc && |
||
590 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { |
||
591 | ret = -EINVAL; |
||
1179 | serge | 592 | goto fail; |
1123 | serge | 593 | } |
594 | if (new_crtc != connector->encoder->crtc) { |
||
1179 | serge | 595 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
1123 | serge | 596 | mode_changed = true; |
597 | connector->encoder->crtc = new_crtc; |
||
598 | } |
||
1963 | serge | 599 | if (new_crtc) { |
600 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", |
||
5060 | serge | 601 | connector->base.id, connector->name, |
1963 | serge | 602 | new_crtc->base.id); |
603 | } else { |
||
604 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", |
||
5060 | serge | 605 | connector->base.id, connector->name); |
1963 | serge | 606 | } |
1123 | serge | 607 | } |
608 | |||
609 | /* mode_set_base is not a required function */ |
||
610 | if (fb_changed && !crtc_funcs->mode_set_base) |
||
611 | mode_changed = true; |
||
612 | |||
613 | if (mode_changed) { |
||
4560 | Serge | 614 | if (drm_helper_crtc_in_use(set->crtc)) { |
1179 | serge | 615 | DRM_DEBUG_KMS("attempting to set mode from" |
616 | " userspace\n"); |
||
1123 | serge | 617 | drm_mode_debug_printmodeline(set->mode); |
5060 | serge | 618 | set->crtc->primary->fb = set->fb; |
1123 | serge | 619 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
620 | set->x, set->y, |
||
4560 | Serge | 621 | save_set.fb)) { |
1963 | serge | 622 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
623 | set->crtc->base.id); |
||
5060 | serge | 624 | set->crtc->primary->fb = save_set.fb; |
1123 | serge | 625 | ret = -EINVAL; |
1179 | serge | 626 | goto fail; |
1123 | serge | 627 | } |
1963 | serge | 628 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
629 | for (i = 0; i < set->num_connectors; i++) { |
||
630 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, |
||
5060 | serge | 631 | set->connectors[i]->name); |
3031 | serge | 632 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
1963 | serge | 633 | } |
1123 | serge | 634 | } |
5060 | serge | 635 | __drm_helper_disable_unused_functions(dev); |
1123 | serge | 636 | } else if (fb_changed) { |
1179 | serge | 637 | set->crtc->x = set->x; |
638 | set->crtc->y = set->y; |
||
5060 | serge | 639 | set->crtc->primary->fb = set->fb; |
1123 | serge | 640 | ret = crtc_funcs->mode_set_base(set->crtc, |
4560 | Serge | 641 | set->x, set->y, save_set.fb); |
1963 | serge | 642 | if (ret != 0) { |
4560 | Serge | 643 | set->crtc->x = save_set.x; |
644 | set->crtc->y = save_set.y; |
||
5060 | serge | 645 | set->crtc->primary->fb = save_set.fb; |
1179 | serge | 646 | goto fail; |
1123 | serge | 647 | } |
1963 | serge | 648 | } |
1123 | serge | 649 | |
1179 | serge | 650 | kfree(save_connectors); |
1123 | serge | 651 | kfree(save_encoders); |
652 | return 0; |
||
653 | |||
1179 | serge | 654 | fail: |
655 | /* Restore all previous data. */ |
||
1123 | serge | 656 | count = 0; |
1179 | serge | 657 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
658 | *encoder = save_encoders[count++]; |
||
1123 | serge | 659 | } |
1179 | serge | 660 | |
1123 | serge | 661 | count = 0; |
662 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
||
1179 | serge | 663 | *connector = save_connectors[count++]; |
1123 | serge | 664 | } |
1179 | serge | 665 | |
3031 | serge | 666 | /* Try to restore the config */ |
667 | if (mode_changed && |
||
668 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, |
||
669 | save_set.y, save_set.fb)) |
||
670 | DRM_ERROR("failed to restore config after modeset failure\n"); |
||
671 | |||
1179 | serge | 672 | kfree(save_connectors); |
1123 | serge | 673 | kfree(save_encoders); |
674 | return ret; |
||
675 | } |
||
676 | EXPORT_SYMBOL(drm_crtc_helper_set_config); |
||
677 | |||
678 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
||
679 | { |
||
680 | int dpms = DRM_MODE_DPMS_OFF; |
||
681 | struct drm_connector *connector; |
||
682 | struct drm_device *dev = encoder->dev; |
||
683 | |||
684 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
||
685 | if (connector->encoder == encoder) |
||
686 | if (connector->dpms < dpms) |
||
687 | dpms = connector->dpms; |
||
688 | return dpms; |
||
689 | } |
||
690 | |||
4104 | Serge | 691 | /* Helper which handles bridge ordering around encoder dpms */ |
692 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) |
||
693 | { |
||
694 | struct drm_bridge *bridge = encoder->bridge; |
||
695 | struct drm_encoder_helper_funcs *encoder_funcs; |
||
696 | |||
697 | if (bridge) { |
||
698 | if (mode == DRM_MODE_DPMS_ON) |
||
699 | bridge->funcs->pre_enable(bridge); |
||
700 | else |
||
701 | bridge->funcs->disable(bridge); |
||
702 | } |
||
703 | |||
704 | encoder_funcs = encoder->helper_private; |
||
705 | if (encoder_funcs->dpms) |
||
706 | encoder_funcs->dpms(encoder, mode); |
||
707 | |||
708 | if (bridge) { |
||
709 | if (mode == DRM_MODE_DPMS_ON) |
||
710 | bridge->funcs->enable(bridge); |
||
711 | else |
||
712 | bridge->funcs->post_disable(bridge); |
||
713 | } |
||
714 | } |
||
715 | |||
1123 | serge | 716 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
717 | { |
||
718 | int dpms = DRM_MODE_DPMS_OFF; |
||
719 | struct drm_connector *connector; |
||
720 | struct drm_device *dev = crtc->dev; |
||
721 | |||
722 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
||
723 | if (connector->encoder && connector->encoder->crtc == crtc) |
||
724 | if (connector->dpms < dpms) |
||
725 | dpms = connector->dpms; |
||
726 | return dpms; |
||
727 | } |
||
728 | |||
729 | /** |
||
3192 | Serge | 730 | * drm_helper_connector_dpms() - connector dpms helper implementation |
731 | * @connector: affected connector |
||
732 | * @mode: DPMS mode |
||
1123 | serge | 733 | * |
3192 | Serge | 734 | * This is the main helper function provided by the crtc helper framework for |
735 | * implementing the DPMS connector attribute. It computes the new desired DPMS |
||
736 | * state for all encoders and crtcs in the output mesh and calls the ->dpms() |
||
737 | * callback provided by the driver appropriately. |
||
1123 | serge | 738 | */ |
739 | void drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
||
740 | { |
||
741 | struct drm_encoder *encoder = connector->encoder; |
||
742 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; |
||
4104 | Serge | 743 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
1123 | serge | 744 | |
745 | if (mode == connector->dpms) |
||
746 | return; |
||
747 | |||
748 | old_dpms = connector->dpms; |
||
749 | connector->dpms = mode; |
||
750 | |||
4104 | Serge | 751 | if (encoder) |
752 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); |
||
753 | |||
1123 | serge | 754 | /* from off to on, do crtc then encoder */ |
755 | if (mode < old_dpms) { |
||
756 | if (crtc) { |
||
757 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
||
758 | if (crtc_funcs->dpms) |
||
759 | (*crtc_funcs->dpms) (crtc, |
||
760 | drm_helper_choose_crtc_dpms(crtc)); |
||
761 | } |
||
4104 | Serge | 762 | if (encoder) |
763 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1123 | serge | 764 | } |
765 | |||
766 | /* from on to off, do encoder then crtc */ |
||
767 | if (mode > old_dpms) { |
||
4104 | Serge | 768 | if (encoder) |
769 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1123 | serge | 770 | if (crtc) { |
771 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
||
772 | if (crtc_funcs->dpms) |
||
773 | (*crtc_funcs->dpms) (crtc, |
||
774 | drm_helper_choose_crtc_dpms(crtc)); |
||
775 | } |
||
776 | } |
||
777 | |||
778 | return; |
||
779 | } |
||
780 | EXPORT_SYMBOL(drm_helper_connector_dpms); |
||
781 | |||
5060 | serge | 782 | /** |
783 | * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata |
||
784 | * @fb: drm_framebuffer object to fill out |
||
785 | * @mode_cmd: metadata from the userspace fb creation request |
||
786 | * |
||
787 | * This helper can be used in a drivers fb_create callback to pre-fill the fb's |
||
788 | * metadata fields. |
||
789 | */ |
||
790 | void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
||
3031 | serge | 791 | struct drm_mode_fb_cmd2 *mode_cmd) |
1123 | serge | 792 | { |
3031 | serge | 793 | int i; |
794 | |||
1123 | serge | 795 | fb->width = mode_cmd->width; |
796 | fb->height = mode_cmd->height; |
||
3031 | serge | 797 | for (i = 0; i < 4; i++) { |
798 | fb->pitches[i] = mode_cmd->pitches[i]; |
||
799 | fb->offsets[i] = mode_cmd->offsets[i]; |
||
800 | } |
||
801 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
||
802 | &fb->bits_per_pixel); |
||
803 | fb->pixel_format = mode_cmd->pixel_format; |
||
5060 | serge | 804 | fb->flags = mode_cmd->flags; |
1123 | serge | 805 | } |
806 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); |
||
807 | |||
5060 | serge | 808 | /** |
809 | * drm_helper_resume_force_mode - force-restore mode setting configuration |
||
810 | * @dev: drm_device which should be restored |
||
811 | * |
||
812 | * Drivers which use the mode setting helpers can use this function to |
||
813 | * force-restore the mode setting configuration e.g. on resume or when something |
||
814 | * else might have trampled over the hw state (like some overzealous old BIOSen |
||
815 | * tended to do). |
||
816 | * |
||
817 | * This helper doesn't provide a error return value since restoring the old |
||
818 | * config should never fail due to resource allocation issues since the driver |
||
819 | * has successfully set the restored configuration already. Hence this should |
||
820 | * boil down to the equivalent of a few dpms on calls, which also don't provide |
||
821 | * an error code. |
||
822 | * |
||
823 | * Drivers where simply restoring an old configuration again might fail (e.g. |
||
824 | * due to slight differences in allocating shared resources when the |
||
825 | * configuration is restored in a different order than when userspace set it up) |
||
826 | * need to use their own restore logic. |
||
827 | */ |
||
828 | void drm_helper_resume_force_mode(struct drm_device *dev) |
||
1123 | serge | 829 | { |
830 | struct drm_crtc *crtc; |
||
1404 | serge | 831 | struct drm_encoder *encoder; |
832 | struct drm_crtc_helper_funcs *crtc_funcs; |
||
5060 | serge | 833 | int encoder_dpms; |
834 | bool ret; |
||
1123 | serge | 835 | |
5060 | serge | 836 | drm_modeset_lock_all(dev); |
1123 | serge | 837 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
838 | |||
1179 | serge | 839 | if (!crtc->enabled) |
840 | continue; |
||
1123 | serge | 841 | |
1179 | serge | 842 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
5060 | serge | 843 | crtc->x, crtc->y, crtc->primary->fb); |
1123 | serge | 844 | |
5060 | serge | 845 | /* Restoring the old config should never fail! */ |
1123 | serge | 846 | if (ret == false) |
847 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); |
||
1404 | serge | 848 | |
849 | /* Turn off outputs that were already powered off */ |
||
850 | if (drm_helper_choose_crtc_dpms(crtc)) { |
||
851 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
||
852 | |||
853 | if(encoder->crtc != crtc) |
||
854 | continue; |
||
855 | |||
4104 | Serge | 856 | encoder_dpms = drm_helper_choose_encoder_dpms( |
857 | encoder); |
||
858 | |||
859 | drm_helper_encoder_dpms(encoder, encoder_dpms); |
||
1963 | serge | 860 | } |
1404 | serge | 861 | |
862 | crtc_funcs = crtc->helper_private; |
||
863 | if (crtc_funcs->dpms) |
||
864 | (*crtc_funcs->dpms) (crtc, |
||
865 | drm_helper_choose_crtc_dpms(crtc)); |
||
866 | } |
||
867 | } |
||
5060 | serge | 868 | |
1179 | serge | 869 | /* disable the unused connectors while restoring the modesetting */ |
5060 | serge | 870 | __drm_helper_disable_unused_functions(dev); |
871 | drm_modeset_unlock_all(dev); |
||
1123 | serge | 872 | } |
873 | EXPORT_SYMBOL(drm_helper_resume_force_mode);>>>>>>> |