Rev 6937 | Details | Compare with Previous | Last modification | View Log | RSS feed
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6084 | serge | 1 | /* |
2 | * Copyright (C) 2014 Red Hat |
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3 | * Copyright (C) 2014 Intel Corp. |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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6 | * copy of this software and associated documentation files (the "Software"), |
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7 | * to deal in the Software without restriction, including without limitation |
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8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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9 | * and/or sell copies of the Software, and to permit persons to whom the |
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10 | * Software is furnished to do so, subject to the following conditions: |
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11 | * |
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12 | * The above copyright notice and this permission notice shall be included in |
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13 | * all copies or substantial portions of the Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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21 | * OTHER DEALINGS IN THE SOFTWARE. |
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22 | * |
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23 | * Authors: |
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24 | * Rob Clark |
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25 | * Daniel Vetter |
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26 | */ |
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27 | |||
28 | #include |
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29 | #include |
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30 | #include |
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31 | #include |
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32 | #include |
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33 | #include |
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34 | |||
35 | /** |
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36 | * DOC: overview |
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37 | * |
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38 | * This helper library provides implementations of check and commit functions on |
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39 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It |
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40 | * also provides convenience implementations for the atomic state handling |
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41 | * callbacks for drivers which don't need to subclass the drm core structures to |
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42 | * add their own additional internal state. |
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43 | * |
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44 | * This library also provides default implementations for the check callback in |
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45 | * drm_atomic_helper_check() and for the commit callback with |
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46 | * drm_atomic_helper_commit(). But the individual stages and callbacks are |
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47 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only |
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48 | * together with a driver private modeset implementation. |
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49 | * |
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50 | * This library also provides implementations for all the legacy driver |
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51 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
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52 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the |
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53 | * various functions to implement set_property callbacks. New drivers must not |
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54 | * implement these functions themselves but must use the provided helpers. |
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6937 | serge | 55 | * |
56 | * The atomic helper uses the same function table structures as all other |
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57 | * modesetting helpers. See the documentation for struct &drm_crtc_helper_funcs, |
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58 | * struct &drm_encoder_helper_funcs and struct &drm_connector_helper_funcs. It |
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59 | * also shares the struct &drm_plane_helper_funcs function table with the plane |
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60 | * helpers. |
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6084 | serge | 61 | */ |
62 | static void |
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63 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, |
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64 | struct drm_plane_state *plane_state, |
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65 | struct drm_plane *plane) |
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66 | { |
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67 | struct drm_crtc_state *crtc_state; |
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68 | |||
69 | if (plane->state->crtc) { |
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7144 | serge | 70 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
71 | plane->state->crtc); |
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6084 | serge | 72 | |
73 | if (WARN_ON(!crtc_state)) |
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74 | return; |
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75 | |||
76 | crtc_state->planes_changed = true; |
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77 | } |
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78 | |||
79 | if (plane_state->crtc) { |
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7144 | serge | 80 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
81 | plane_state->crtc); |
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6084 | serge | 82 | |
83 | if (WARN_ON(!crtc_state)) |
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84 | return; |
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85 | |||
86 | crtc_state->planes_changed = true; |
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87 | } |
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88 | } |
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89 | |||
7144 | serge | 90 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
91 | bool disable_conflicting_encoders) |
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6937 | serge | 92 | { |
7144 | serge | 93 | struct drm_connector_state *conn_state; |
6937 | serge | 94 | struct drm_connector *connector; |
7144 | serge | 95 | struct drm_encoder *encoder; |
96 | unsigned encoder_mask = 0; |
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97 | int i, ret; |
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6937 | serge | 98 | |
7144 | serge | 99 | /* |
100 | * First loop, find all newly assigned encoders from the connectors |
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101 | * part of the state. If the same encoder is assigned to multiple |
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102 | * connectors bail out. |
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103 | */ |
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6937 | serge | 104 | for_each_connector_in_state(state, connector, conn_state, i) { |
7144 | serge | 105 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
106 | struct drm_encoder *new_encoder; |
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107 | |||
108 | if (!conn_state->crtc) |
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6937 | serge | 109 | continue; |
110 | |||
7144 | serge | 111 | if (funcs->atomic_best_encoder) |
112 | new_encoder = funcs->atomic_best_encoder(connector, conn_state); |
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113 | else |
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114 | new_encoder = funcs->best_encoder(connector); |
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115 | |||
116 | if (new_encoder) { |
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117 | if (encoder_mask & (1 << drm_encoder_index(new_encoder))) { |
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118 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", |
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119 | new_encoder->base.id, new_encoder->name, |
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120 | connector->base.id, connector->name); |
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121 | |||
122 | return -EINVAL; |
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123 | } |
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124 | |||
125 | encoder_mask |= 1 << drm_encoder_index(new_encoder); |
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126 | } |
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6937 | serge | 127 | } |
128 | |||
7144 | serge | 129 | if (!encoder_mask) |
130 | return 0; |
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131 | |||
132 | /* |
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133 | * Second loop, iterate over all connectors not part of the state. |
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134 | * |
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135 | * If a conflicting encoder is found and disable_conflicting_encoders |
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136 | * is not set, an error is returned. Userspace can provide a solution |
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137 | * through the atomic ioctl. |
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138 | * |
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139 | * If the flag is set conflicting connectors are removed from the crtc |
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140 | * and the crtc is disabled if no encoder is left. This preserves |
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141 | * compatibility with the legacy set_config behavior. |
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142 | */ |
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143 | drm_for_each_connector(connector, state->dev) { |
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144 | struct drm_crtc_state *crtc_state; |
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145 | |||
146 | if (drm_atomic_get_existing_connector_state(state, connector)) |
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147 | continue; |
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148 | |||
149 | encoder = connector->state->best_encoder; |
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150 | if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder)))) |
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151 | continue; |
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152 | |||
153 | if (!disable_conflicting_encoders) { |
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154 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", |
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155 | encoder->base.id, encoder->name, |
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156 | connector->state->crtc->base.id, |
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157 | connector->state->crtc->name, |
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158 | connector->base.id, connector->name); |
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159 | return -EINVAL; |
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160 | } |
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161 | |||
162 | conn_state = drm_atomic_get_connector_state(state, connector); |
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163 | if (IS_ERR(conn_state)) |
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164 | return PTR_ERR(conn_state); |
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165 | |||
166 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", |
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167 | encoder->base.id, encoder->name, |
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168 | conn_state->crtc->base.id, conn_state->crtc->name, |
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169 | connector->base.id, connector->name); |
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170 | |||
171 | crtc_state = drm_atomic_get_existing_crtc_state(state, conn_state->crtc); |
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172 | |||
173 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); |
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174 | if (ret) |
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175 | return ret; |
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176 | |||
177 | if (!crtc_state->connector_mask) { |
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178 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
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179 | NULL); |
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180 | if (ret < 0) |
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181 | return ret; |
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182 | |||
183 | crtc_state->active = false; |
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184 | } |
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185 | } |
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186 | |||
187 | return 0; |
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6937 | serge | 188 | } |
189 | |||
7144 | serge | 190 | static void |
191 | set_best_encoder(struct drm_atomic_state *state, |
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192 | struct drm_connector_state *conn_state, |
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193 | struct drm_encoder *encoder) |
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6084 | serge | 194 | { |
7144 | serge | 195 | struct drm_crtc_state *crtc_state; |
196 | struct drm_crtc *crtc; |
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6084 | serge | 197 | |
7144 | serge | 198 | if (conn_state->best_encoder) { |
199 | /* Unset the encoder_mask in the old crtc state. */ |
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200 | crtc = conn_state->connector->state->crtc; |
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6084 | serge | 201 | |
7144 | serge | 202 | /* A NULL crtc is an error here because we should have |
203 | * duplicated a NULL best_encoder when crtc was NULL. |
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204 | * As an exception restoring duplicated atomic state |
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205 | * during resume is allowed, so don't warn when |
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206 | * best_encoder is equal to encoder we intend to set. |
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207 | */ |
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208 | WARN_ON(!crtc && encoder != conn_state->best_encoder); |
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209 | if (crtc) { |
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210 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); |
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6084 | serge | 211 | |
7144 | serge | 212 | crtc_state->encoder_mask &= |
213 | ~(1 << drm_encoder_index(conn_state->best_encoder)); |
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214 | } |
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6084 | serge | 215 | } |
216 | |||
7144 | serge | 217 | if (encoder) { |
218 | crtc = conn_state->crtc; |
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219 | WARN_ON(!crtc); |
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220 | if (crtc) { |
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221 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); |
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222 | |||
223 | crtc_state->encoder_mask |= |
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224 | 1 << drm_encoder_index(encoder); |
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225 | } |
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226 | } |
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227 | |||
228 | conn_state->best_encoder = encoder; |
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6084 | serge | 229 | } |
230 | |||
7144 | serge | 231 | static void |
6084 | serge | 232 | steal_encoder(struct drm_atomic_state *state, |
7144 | serge | 233 | struct drm_encoder *encoder) |
6084 | serge | 234 | { |
235 | struct drm_crtc_state *crtc_state; |
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236 | struct drm_connector *connector; |
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237 | struct drm_connector_state *connector_state; |
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7144 | serge | 238 | int i; |
6084 | serge | 239 | |
7144 | serge | 240 | for_each_connector_in_state(state, connector, connector_state, i) { |
241 | struct drm_crtc *encoder_crtc; |
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6084 | serge | 242 | |
7144 | serge | 243 | if (connector_state->best_encoder != encoder) |
244 | continue; |
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6084 | serge | 245 | |
7144 | serge | 246 | encoder_crtc = connector->state->crtc; |
6084 | serge | 247 | |
7144 | serge | 248 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
249 | encoder->base.id, encoder->name, |
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250 | encoder_crtc->base.id, encoder_crtc->name); |
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6084 | serge | 251 | |
7144 | serge | 252 | set_best_encoder(state, connector_state, NULL); |
6084 | serge | 253 | |
7144 | serge | 254 | crtc_state = drm_atomic_get_existing_crtc_state(state, encoder_crtc); |
255 | crtc_state->connectors_changed = true; |
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6084 | serge | 256 | |
7144 | serge | 257 | return; |
6084 | serge | 258 | } |
259 | } |
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260 | |||
261 | static int |
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7144 | serge | 262 | update_connector_routing(struct drm_atomic_state *state, |
263 | struct drm_connector *connector, |
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264 | struct drm_connector_state *connector_state) |
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6084 | serge | 265 | { |
266 | const struct drm_connector_helper_funcs *funcs; |
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267 | struct drm_encoder *new_encoder; |
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268 | struct drm_crtc_state *crtc_state; |
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269 | |||
270 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
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271 | connector->base.id, |
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272 | connector->name); |
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273 | |||
274 | if (connector->state->crtc != connector_state->crtc) { |
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275 | if (connector->state->crtc) { |
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7144 | serge | 276 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc); |
6084 | serge | 277 | crtc_state->connectors_changed = true; |
278 | } |
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279 | |||
280 | if (connector_state->crtc) { |
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7144 | serge | 281 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
6084 | serge | 282 | crtc_state->connectors_changed = true; |
283 | } |
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284 | } |
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285 | |||
286 | if (!connector_state->crtc) { |
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287 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
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288 | connector->base.id, |
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289 | connector->name); |
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290 | |||
7144 | serge | 291 | set_best_encoder(state, connector_state, NULL); |
6084 | serge | 292 | |
293 | return 0; |
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294 | } |
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295 | |||
296 | funcs = connector->helper_private; |
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297 | |||
298 | if (funcs->atomic_best_encoder) |
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299 | new_encoder = funcs->atomic_best_encoder(connector, |
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300 | connector_state); |
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301 | else |
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302 | new_encoder = funcs->best_encoder(connector); |
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303 | |||
304 | if (!new_encoder) { |
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305 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
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306 | connector->base.id, |
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307 | connector->name); |
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308 | return -EINVAL; |
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309 | } |
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310 | |||
311 | if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
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312 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", |
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313 | new_encoder->base.id, |
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314 | new_encoder->name, |
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315 | connector_state->crtc->base.id); |
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316 | return -EINVAL; |
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317 | } |
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318 | |||
319 | if (new_encoder == connector_state->best_encoder) { |
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7144 | serge | 320 | set_best_encoder(state, connector_state, new_encoder); |
321 | |||
6937 | serge | 322 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
6084 | serge | 323 | connector->base.id, |
324 | connector->name, |
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325 | new_encoder->base.id, |
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326 | new_encoder->name, |
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6937 | serge | 327 | connector_state->crtc->base.id, |
328 | connector_state->crtc->name); |
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6084 | serge | 329 | |
330 | return 0; |
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331 | } |
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332 | |||
7144 | serge | 333 | steal_encoder(state, new_encoder); |
6937 | serge | 334 | |
7144 | serge | 335 | set_best_encoder(state, connector_state, new_encoder); |
6084 | serge | 336 | |
7144 | serge | 337 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
6084 | serge | 338 | crtc_state->connectors_changed = true; |
339 | |||
6937 | serge | 340 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
6084 | serge | 341 | connector->base.id, |
342 | connector->name, |
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343 | new_encoder->base.id, |
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344 | new_encoder->name, |
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6937 | serge | 345 | connector_state->crtc->base.id, |
346 | connector_state->crtc->name); |
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6084 | serge | 347 | |
348 | return 0; |
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349 | } |
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350 | |||
351 | static int |
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352 | mode_fixup(struct drm_atomic_state *state) |
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353 | { |
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354 | struct drm_crtc *crtc; |
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355 | struct drm_crtc_state *crtc_state; |
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356 | struct drm_connector *connector; |
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357 | struct drm_connector_state *conn_state; |
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358 | int i; |
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6937 | serge | 359 | bool ret; |
6084 | serge | 360 | |
361 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
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362 | if (!crtc_state->mode_changed && |
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363 | !crtc_state->connectors_changed) |
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364 | continue; |
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365 | |||
366 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); |
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367 | } |
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368 | |||
369 | for_each_connector_in_state(state, connector, conn_state, i) { |
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370 | const struct drm_encoder_helper_funcs *funcs; |
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371 | struct drm_encoder *encoder; |
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372 | |||
373 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
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374 | |||
375 | if (!conn_state->crtc || !conn_state->best_encoder) |
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376 | continue; |
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377 | |||
7144 | serge | 378 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
379 | conn_state->crtc); |
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6084 | serge | 380 | |
381 | /* |
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382 | * Each encoder has at most one connector (since we always steal |
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383 | * it away), so we won't call ->mode_fixup twice. |
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384 | */ |
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385 | encoder = conn_state->best_encoder; |
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386 | funcs = encoder->helper_private; |
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387 | if (!funcs) |
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388 | continue; |
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389 | |||
390 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
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391 | &crtc_state->adjusted_mode); |
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392 | if (!ret) { |
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393 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); |
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394 | return -EINVAL; |
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395 | } |
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396 | |||
397 | if (funcs->atomic_check) { |
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398 | ret = funcs->atomic_check(encoder, crtc_state, |
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399 | conn_state); |
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400 | if (ret) { |
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401 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
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402 | encoder->base.id, encoder->name); |
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403 | return ret; |
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404 | } |
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405 | } else if (funcs->mode_fixup) { |
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406 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
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407 | &crtc_state->adjusted_mode); |
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408 | if (!ret) { |
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409 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
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410 | encoder->base.id, encoder->name); |
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411 | return -EINVAL; |
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412 | } |
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413 | } |
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414 | } |
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415 | |||
416 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
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417 | const struct drm_crtc_helper_funcs *funcs; |
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418 | |||
419 | if (!crtc_state->mode_changed && |
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420 | !crtc_state->connectors_changed) |
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421 | continue; |
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422 | |||
423 | funcs = crtc->helper_private; |
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424 | if (!funcs->mode_fixup) |
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425 | continue; |
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426 | |||
427 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
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428 | &crtc_state->adjusted_mode); |
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429 | if (!ret) { |
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6937 | serge | 430 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
431 | crtc->base.id, crtc->name); |
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6084 | serge | 432 | return -EINVAL; |
433 | } |
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434 | } |
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435 | |||
436 | return 0; |
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437 | } |
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438 | |||
439 | /** |
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440 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
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441 | * @dev: DRM device |
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442 | * @state: the driver state object |
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443 | * |
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444 | * Check the state object to see if the requested state is physically possible. |
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445 | * This does all the crtc and connector related computations for an atomic |
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446 | * update and adds any additional connectors needed for full modesets and calls |
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447 | * down into ->mode_fixup functions of the driver backend. |
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448 | * |
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449 | * crtc_state->mode_changed is set when the input mode is changed. |
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450 | * crtc_state->connectors_changed is set when a connector is added or |
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451 | * removed from the crtc. |
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452 | * crtc_state->active_changed is set when crtc_state->active changes, |
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453 | * which is used for dpms. |
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454 | * |
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455 | * IMPORTANT: |
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456 | * |
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457 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a |
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458 | * plane update can't be done without a full modeset) _must_ call this function |
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459 | * afterwards after that change. It is permitted to call this function multiple |
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460 | * times for the same update, e.g. when the ->atomic_check functions depend upon |
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461 | * the adjusted dotclock for fifo space allocation and watermark computation. |
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462 | * |
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463 | * RETURNS |
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464 | * Zero for success or -errno |
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465 | */ |
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466 | int |
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467 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
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468 | struct drm_atomic_state *state) |
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469 | { |
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470 | struct drm_crtc *crtc; |
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471 | struct drm_crtc_state *crtc_state; |
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472 | struct drm_connector *connector; |
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473 | struct drm_connector_state *connector_state; |
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474 | int i, ret; |
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475 | |||
476 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
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477 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
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6937 | serge | 478 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
479 | crtc->base.id, crtc->name); |
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6084 | serge | 480 | crtc_state->mode_changed = true; |
481 | } |
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482 | |||
483 | if (crtc->state->enable != crtc_state->enable) { |
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6937 | serge | 484 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
485 | crtc->base.id, crtc->name); |
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6084 | serge | 486 | |
487 | /* |
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488 | * For clarity this assignment is done here, but |
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489 | * enable == 0 is only true when there are no |
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490 | * connectors and a NULL mode. |
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491 | * |
||
492 | * The other way around is true as well. enable != 0 |
||
493 | * iff connectors are attached and a mode is set. |
||
494 | */ |
||
495 | crtc_state->mode_changed = true; |
||
496 | crtc_state->connectors_changed = true; |
||
497 | } |
||
498 | } |
||
499 | |||
7144 | serge | 500 | ret = handle_conflicting_encoders(state, state->legacy_set_config); |
501 | if (ret) |
||
502 | return ret; |
||
503 | |||
6084 | serge | 504 | for_each_connector_in_state(state, connector, connector_state, i) { |
505 | /* |
||
506 | * This only sets crtc->mode_changed for routing changes, |
||
507 | * drivers must set crtc->mode_changed themselves when connector |
||
508 | * properties need to be updated. |
||
509 | */ |
||
7144 | serge | 510 | ret = update_connector_routing(state, connector, |
511 | connector_state); |
||
6084 | serge | 512 | if (ret) |
513 | return ret; |
||
514 | } |
||
515 | |||
516 | /* |
||
517 | * After all the routing has been prepared we need to add in any |
||
518 | * connector which is itself unchanged, but who's crtc changes it's |
||
519 | * configuration. This must be done before calling mode_fixup in case a |
||
520 | * crtc only changed its mode but has the same set of connectors. |
||
521 | */ |
||
522 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
||
6937 | serge | 523 | bool has_connectors = |
524 | !!crtc_state->connector_mask; |
||
6084 | serge | 525 | |
526 | /* |
||
527 | * We must set ->active_changed after walking connectors for |
||
528 | * otherwise an update that only changes active would result in |
||
529 | * a full modeset because update_connector_routing force that. |
||
530 | */ |
||
531 | if (crtc->state->active != crtc_state->active) { |
||
6937 | serge | 532 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
533 | crtc->base.id, crtc->name); |
||
6084 | serge | 534 | crtc_state->active_changed = true; |
535 | } |
||
536 | |||
537 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
||
538 | continue; |
||
539 | |||
6937 | serge | 540 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
541 | crtc->base.id, crtc->name, |
||
6084 | serge | 542 | crtc_state->enable ? 'y' : 'n', |
7144 | serge | 543 | crtc_state->active ? 'y' : 'n'); |
6084 | serge | 544 | |
545 | ret = drm_atomic_add_affected_connectors(state, crtc); |
||
546 | if (ret != 0) |
||
547 | return ret; |
||
548 | |||
549 | ret = drm_atomic_add_affected_planes(state, crtc); |
||
550 | if (ret != 0) |
||
551 | return ret; |
||
552 | |||
6937 | serge | 553 | if (crtc_state->enable != has_connectors) { |
554 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
||
555 | crtc->base.id, crtc->name); |
||
6084 | serge | 556 | |
557 | return -EINVAL; |
||
558 | } |
||
559 | } |
||
560 | |||
561 | return mode_fixup(state); |
||
562 | } |
||
563 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
||
564 | |||
565 | /** |
||
566 | * drm_atomic_helper_check_planes - validate state object for planes changes |
||
567 | * @dev: DRM device |
||
568 | * @state: the driver state object |
||
569 | * |
||
570 | * Check the state object to see if the requested state is physically possible. |
||
571 | * This does all the plane update related checks using by calling into the |
||
572 | * ->atomic_check hooks provided by the driver. |
||
573 | * |
||
574 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
||
575 | * updated planes. |
||
576 | * |
||
577 | * RETURNS |
||
578 | * Zero for success or -errno |
||
579 | */ |
||
580 | int |
||
581 | drm_atomic_helper_check_planes(struct drm_device *dev, |
||
582 | struct drm_atomic_state *state) |
||
583 | { |
||
584 | struct drm_crtc *crtc; |
||
585 | struct drm_crtc_state *crtc_state; |
||
586 | struct drm_plane *plane; |
||
587 | struct drm_plane_state *plane_state; |
||
588 | int i, ret = 0; |
||
589 | |||
590 | for_each_plane_in_state(state, plane, plane_state, i) { |
||
591 | const struct drm_plane_helper_funcs *funcs; |
||
592 | |||
593 | funcs = plane->helper_private; |
||
594 | |||
595 | drm_atomic_helper_plane_changed(state, plane_state, plane); |
||
596 | |||
597 | if (!funcs || !funcs->atomic_check) |
||
598 | continue; |
||
599 | |||
600 | ret = funcs->atomic_check(plane, plane_state); |
||
601 | if (ret) { |
||
6937 | serge | 602 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
603 | plane->base.id, plane->name); |
||
6084 | serge | 604 | return ret; |
605 | } |
||
606 | } |
||
607 | |||
608 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
||
609 | const struct drm_crtc_helper_funcs *funcs; |
||
610 | |||
611 | funcs = crtc->helper_private; |
||
612 | |||
613 | if (!funcs || !funcs->atomic_check) |
||
614 | continue; |
||
615 | |||
616 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); |
||
617 | if (ret) { |
||
6937 | serge | 618 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
619 | crtc->base.id, crtc->name); |
||
6084 | serge | 620 | return ret; |
621 | } |
||
622 | } |
||
623 | |||
624 | return ret; |
||
625 | } |
||
626 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); |
||
627 | |||
628 | /** |
||
629 | * drm_atomic_helper_check - validate state object |
||
630 | * @dev: DRM device |
||
631 | * @state: the driver state object |
||
632 | * |
||
633 | * Check the state object to see if the requested state is physically possible. |
||
634 | * Only crtcs and planes have check callbacks, so for any additional (global) |
||
635 | * checking that a driver needs it can simply wrap that around this function. |
||
636 | * Drivers without such needs can directly use this as their ->atomic_check() |
||
637 | * callback. |
||
638 | * |
||
639 | * This just wraps the two parts of the state checking for planes and modeset |
||
640 | * state in the default order: First it calls drm_atomic_helper_check_modeset() |
||
641 | * and then drm_atomic_helper_check_planes(). The assumption is that the |
||
642 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to |
||
643 | * e.g. properly compute watermarks. |
||
644 | * |
||
645 | * RETURNS |
||
646 | * Zero for success or -errno |
||
647 | */ |
||
648 | int drm_atomic_helper_check(struct drm_device *dev, |
||
649 | struct drm_atomic_state *state) |
||
650 | { |
||
651 | int ret; |
||
652 | |||
653 | ret = drm_atomic_helper_check_modeset(dev, state); |
||
654 | if (ret) |
||
655 | return ret; |
||
656 | |||
657 | ret = drm_atomic_helper_check_planes(dev, state); |
||
658 | if (ret) |
||
659 | return ret; |
||
660 | |||
661 | return ret; |
||
662 | } |
||
663 | EXPORT_SYMBOL(drm_atomic_helper_check); |
||
664 | |||
665 | static void |
||
666 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) |
||
667 | { |
||
668 | struct drm_connector *connector; |
||
669 | struct drm_connector_state *old_conn_state; |
||
670 | struct drm_crtc *crtc; |
||
671 | struct drm_crtc_state *old_crtc_state; |
||
672 | int i; |
||
673 | |||
674 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
||
675 | const struct drm_encoder_helper_funcs *funcs; |
||
676 | struct drm_encoder *encoder; |
||
677 | |||
678 | /* Shut down everything that's in the changeset and currently |
||
679 | * still on. So need to check the old, saved state. */ |
||
680 | if (!old_conn_state->crtc) |
||
681 | continue; |
||
682 | |||
7144 | serge | 683 | old_crtc_state = drm_atomic_get_existing_crtc_state(old_state, |
684 | old_conn_state->crtc); |
||
6084 | serge | 685 | |
686 | if (!old_crtc_state->active || |
||
687 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
||
688 | continue; |
||
689 | |||
690 | encoder = old_conn_state->best_encoder; |
||
691 | |||
692 | /* We shouldn't get this far if we didn't previously have |
||
693 | * an encoder.. but WARN_ON() rather than explode. |
||
694 | */ |
||
695 | if (WARN_ON(!encoder)) |
||
696 | continue; |
||
697 | |||
698 | funcs = encoder->helper_private; |
||
699 | |||
700 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
||
701 | encoder->base.id, encoder->name); |
||
702 | |||
703 | /* |
||
704 | * Each encoder has at most one connector (since we always steal |
||
705 | * it away), so we won't call disable hooks twice. |
||
706 | */ |
||
707 | drm_bridge_disable(encoder->bridge); |
||
708 | |||
709 | /* Right function depends upon target state. */ |
||
710 | if (connector->state->crtc && funcs->prepare) |
||
711 | funcs->prepare(encoder); |
||
712 | else if (funcs->disable) |
||
713 | funcs->disable(encoder); |
||
714 | else |
||
715 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); |
||
716 | |||
717 | drm_bridge_post_disable(encoder->bridge); |
||
718 | } |
||
719 | |||
720 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
||
721 | const struct drm_crtc_helper_funcs *funcs; |
||
722 | |||
723 | /* Shut down everything that needs a full modeset. */ |
||
724 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
||
725 | continue; |
||
726 | |||
727 | if (!old_crtc_state->active) |
||
728 | continue; |
||
729 | |||
730 | funcs = crtc->helper_private; |
||
731 | |||
6937 | serge | 732 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
733 | crtc->base.id, crtc->name); |
||
6084 | serge | 734 | |
735 | |||
736 | /* Right function depends upon target state. */ |
||
737 | if (crtc->state->enable && funcs->prepare) |
||
738 | funcs->prepare(crtc); |
||
739 | else if (funcs->disable) |
||
740 | funcs->disable(crtc); |
||
741 | else |
||
742 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); |
||
743 | } |
||
744 | } |
||
745 | |||
746 | /** |
||
747 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state |
||
748 | * @dev: DRM device |
||
749 | * @old_state: atomic state object with old state structures |
||
750 | * |
||
751 | * This function updates all the various legacy modeset state pointers in |
||
752 | * connectors, encoders and crtcs. It also updates the timestamping constants |
||
753 | * used for precise vblank timestamps by calling |
||
754 | * drm_calc_timestamping_constants(). |
||
755 | * |
||
756 | * Drivers can use this for building their own atomic commit if they don't have |
||
757 | * a pure helper-based modeset implementation. |
||
758 | */ |
||
759 | void |
||
760 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, |
||
761 | struct drm_atomic_state *old_state) |
||
762 | { |
||
763 | struct drm_connector *connector; |
||
764 | struct drm_connector_state *old_conn_state; |
||
765 | struct drm_crtc *crtc; |
||
766 | struct drm_crtc_state *old_crtc_state; |
||
767 | int i; |
||
768 | |||
769 | /* clear out existing links and update dpms */ |
||
770 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
||
771 | if (connector->encoder) { |
||
772 | WARN_ON(!connector->encoder->crtc); |
||
773 | |||
774 | connector->encoder->crtc = NULL; |
||
775 | connector->encoder = NULL; |
||
776 | } |
||
777 | |||
778 | crtc = connector->state->crtc; |
||
779 | if ((!crtc && old_conn_state->crtc) || |
||
780 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { |
||
781 | struct drm_property *dpms_prop = |
||
782 | dev->mode_config.dpms_property; |
||
783 | int mode = DRM_MODE_DPMS_OFF; |
||
784 | |||
785 | if (crtc && crtc->state->active) |
||
786 | mode = DRM_MODE_DPMS_ON; |
||
787 | |||
788 | connector->dpms = mode; |
||
789 | drm_object_property_set_value(&connector->base, |
||
790 | dpms_prop, mode); |
||
791 | } |
||
792 | } |
||
793 | |||
794 | /* set new links */ |
||
795 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
||
796 | if (!connector->state->crtc) |
||
797 | continue; |
||
798 | |||
799 | if (WARN_ON(!connector->state->best_encoder)) |
||
800 | continue; |
||
801 | |||
802 | connector->encoder = connector->state->best_encoder; |
||
803 | connector->encoder->crtc = connector->state->crtc; |
||
804 | } |
||
805 | |||
806 | /* set legacy state in the crtc structure */ |
||
807 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
||
808 | struct drm_plane *primary = crtc->primary; |
||
809 | |||
810 | crtc->mode = crtc->state->mode; |
||
811 | crtc->enabled = crtc->state->enable; |
||
812 | |||
813 | if (drm_atomic_get_existing_plane_state(old_state, primary) && |
||
814 | primary->state->crtc == crtc) { |
||
815 | crtc->x = primary->state->src_x >> 16; |
||
816 | crtc->y = primary->state->src_y >> 16; |
||
817 | } |
||
818 | |||
819 | if (crtc->state->enable) |
||
820 | drm_calc_timestamping_constants(crtc, |
||
821 | &crtc->state->adjusted_mode); |
||
822 | } |
||
823 | } |
||
824 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
||
825 | |||
826 | static void |
||
827 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) |
||
828 | { |
||
829 | struct drm_crtc *crtc; |
||
830 | struct drm_crtc_state *old_crtc_state; |
||
831 | struct drm_connector *connector; |
||
832 | struct drm_connector_state *old_conn_state; |
||
833 | int i; |
||
834 | |||
835 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
||
836 | const struct drm_crtc_helper_funcs *funcs; |
||
837 | |||
838 | if (!crtc->state->mode_changed) |
||
839 | continue; |
||
840 | |||
841 | funcs = crtc->helper_private; |
||
842 | |||
843 | if (crtc->state->enable && funcs->mode_set_nofb) { |
||
6937 | serge | 844 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
845 | crtc->base.id, crtc->name); |
||
6084 | serge | 846 | |
847 | funcs->mode_set_nofb(crtc); |
||
848 | } |
||
849 | } |
||
850 | |||
851 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
||
852 | const struct drm_encoder_helper_funcs *funcs; |
||
853 | struct drm_crtc_state *new_crtc_state; |
||
854 | struct drm_encoder *encoder; |
||
855 | struct drm_display_mode *mode, *adjusted_mode; |
||
856 | |||
857 | if (!connector->state->best_encoder) |
||
858 | continue; |
||
859 | |||
860 | encoder = connector->state->best_encoder; |
||
861 | funcs = encoder->helper_private; |
||
862 | new_crtc_state = connector->state->crtc->state; |
||
863 | mode = &new_crtc_state->mode; |
||
864 | adjusted_mode = &new_crtc_state->adjusted_mode; |
||
865 | |||
866 | if (!new_crtc_state->mode_changed) |
||
867 | continue; |
||
868 | |||
869 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
||
870 | encoder->base.id, encoder->name); |
||
871 | |||
872 | /* |
||
873 | * Each encoder has at most one connector (since we always steal |
||
874 | * it away), so we won't call mode_set hooks twice. |
||
875 | */ |
||
876 | if (funcs->mode_set) |
||
877 | funcs->mode_set(encoder, mode, adjusted_mode); |
||
878 | |||
879 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
||
880 | } |
||
881 | } |
||
882 | |||
883 | /** |
||
884 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
||
885 | * @dev: DRM device |
||
886 | * @old_state: atomic state object with old state structures |
||
887 | * |
||
888 | * This function shuts down all the outputs that need to be shut down and |
||
889 | * prepares them (if required) with the new mode. |
||
890 | * |
||
891 | * For compatibility with legacy crtc helpers this should be called before |
||
892 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
||
893 | * does. But drivers with different needs can group the modeset commits together |
||
894 | * and do the plane commits at the end. This is useful for drivers doing runtime |
||
895 | * PM since planes updates then only happen when the CRTC is actually enabled. |
||
896 | */ |
||
897 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
||
898 | struct drm_atomic_state *old_state) |
||
899 | { |
||
900 | disable_outputs(dev, old_state); |
||
901 | |||
902 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); |
||
903 | |||
904 | crtc_set_mode(dev, old_state); |
||
905 | } |
||
906 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
||
907 | |||
908 | /** |
||
909 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
||
910 | * @dev: DRM device |
||
911 | * @old_state: atomic state object with old state structures |
||
912 | * |
||
913 | * This function enables all the outputs with the new configuration which had to |
||
914 | * be turned off for the update. |
||
915 | * |
||
916 | * For compatibility with legacy crtc helpers this should be called after |
||
917 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
||
918 | * does. But drivers with different needs can group the modeset commits together |
||
919 | * and do the plane commits at the end. This is useful for drivers doing runtime |
||
920 | * PM since planes updates then only happen when the CRTC is actually enabled. |
||
921 | */ |
||
922 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
||
923 | struct drm_atomic_state *old_state) |
||
924 | { |
||
925 | struct drm_crtc *crtc; |
||
926 | struct drm_crtc_state *old_crtc_state; |
||
927 | struct drm_connector *connector; |
||
928 | struct drm_connector_state *old_conn_state; |
||
929 | int i; |
||
930 | |||
931 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
||
932 | const struct drm_crtc_helper_funcs *funcs; |
||
933 | |||
934 | /* Need to filter out CRTCs where only planes change. */ |
||
935 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
||
936 | continue; |
||
937 | |||
938 | if (!crtc->state->active) |
||
939 | continue; |
||
940 | |||
941 | funcs = crtc->helper_private; |
||
942 | |||
943 | if (crtc->state->enable) { |
||
6937 | serge | 944 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
945 | crtc->base.id, crtc->name); |
||
6084 | serge | 946 | |
947 | if (funcs->enable) |
||
948 | funcs->enable(crtc); |
||
949 | else |
||
950 | funcs->commit(crtc); |
||
951 | } |
||
952 | } |
||
953 | |||
954 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
||
955 | const struct drm_encoder_helper_funcs *funcs; |
||
956 | struct drm_encoder *encoder; |
||
957 | |||
958 | if (!connector->state->best_encoder) |
||
959 | continue; |
||
960 | |||
961 | if (!connector->state->crtc->state->active || |
||
962 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
||
963 | continue; |
||
964 | |||
965 | encoder = connector->state->best_encoder; |
||
966 | funcs = encoder->helper_private; |
||
967 | |||
968 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
||
969 | encoder->base.id, encoder->name); |
||
970 | |||
971 | /* |
||
972 | * Each encoder has at most one connector (since we always steal |
||
973 | * it away), so we won't call enable hooks twice. |
||
974 | */ |
||
975 | drm_bridge_pre_enable(encoder->bridge); |
||
976 | |||
977 | if (funcs->enable) |
||
978 | funcs->enable(encoder); |
||
979 | else |
||
980 | funcs->commit(encoder); |
||
981 | |||
982 | drm_bridge_enable(encoder->bridge); |
||
983 | } |
||
984 | } |
||
985 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
||
986 | |||
987 | static void wait_for_fences(struct drm_device *dev, |
||
988 | struct drm_atomic_state *state) |
||
989 | { |
||
990 | struct drm_plane *plane; |
||
991 | struct drm_plane_state *plane_state; |
||
992 | int i; |
||
993 | |||
994 | for_each_plane_in_state(state, plane, plane_state, i) { |
||
995 | if (!plane->state->fence) |
||
996 | continue; |
||
997 | |||
998 | WARN_ON(!plane->state->fb); |
||
999 | |||
1000 | fence_wait(plane->state->fence, false); |
||
1001 | fence_put(plane->state->fence); |
||
1002 | plane->state->fence = NULL; |
||
1003 | } |
||
1004 | } |
||
1005 | |||
6937 | serge | 1006 | /** |
1007 | * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed |
||
1008 | * @dev: DRM device |
||
1009 | * @old_state: atomic state object with old state structures |
||
1010 | * @crtc: DRM crtc |
||
1011 | * |
||
1012 | * Checks whether the framebuffer used for this CRTC changes as a result of |
||
1013 | * the atomic update. This is useful for drivers which cannot use |
||
1014 | * drm_atomic_helper_wait_for_vblanks() and need to reimplement its |
||
1015 | * functionality. |
||
1016 | * |
||
1017 | * Returns: |
||
1018 | * true if the framebuffer changed. |
||
1019 | */ |
||
1020 | bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, |
||
7144 | serge | 1021 | struct drm_atomic_state *old_state, |
1022 | struct drm_crtc *crtc) |
||
6084 | serge | 1023 | { |
1024 | struct drm_plane *plane; |
||
1025 | struct drm_plane_state *old_plane_state; |
||
1026 | int i; |
||
1027 | |||
1028 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
||
1029 | if (plane->state->crtc != crtc && |
||
1030 | old_plane_state->crtc != crtc) |
||
1031 | continue; |
||
1032 | |||
1033 | if (plane->state->fb != old_plane_state->fb) |
||
1034 | return true; |
||
1035 | } |
||
1036 | |||
1037 | return false; |
||
1038 | } |
||
6937 | serge | 1039 | EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed); |
6084 | serge | 1040 | |
1041 | /** |
||
1042 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs |
||
1043 | * @dev: DRM device |
||
1044 | * @old_state: atomic state object with old state structures |
||
1045 | * |
||
1046 | * Helper to, after atomic commit, wait for vblanks on all effected |
||
1047 | * crtcs (ie. before cleaning up old framebuffers using |
||
1048 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
||
1049 | * framebuffers have actually changed to optimize for the legacy cursor and |
||
1050 | * plane update use-case. |
||
1051 | */ |
||
1052 | void |
||
1053 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, |
||
1054 | struct drm_atomic_state *old_state) |
||
1055 | { |
||
1056 | struct drm_crtc *crtc; |
||
1057 | struct drm_crtc_state *old_crtc_state; |
||
1058 | int i, ret; |
||
1059 | |||
1060 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
||
1061 | /* No one cares about the old state, so abuse it for tracking |
||
1062 | * and store whether we hold a vblank reference (and should do a |
||
1063 | * vblank wait) in the ->enable boolean. */ |
||
1064 | old_crtc_state->enable = false; |
||
1065 | |||
1066 | if (!crtc->state->enable) |
||
1067 | continue; |
||
1068 | |||
1069 | /* Legacy cursor ioctls are completely unsynced, and userspace |
||
1070 | * relies on that (by doing tons of cursor updates). */ |
||
1071 | if (old_state->legacy_cursor_update) |
||
1072 | continue; |
||
1073 | |||
6937 | serge | 1074 | if (!drm_atomic_helper_framebuffer_changed(dev, |
1075 | old_state, crtc)) |
||
6084 | serge | 1076 | continue; |
1077 | |||
1078 | ret = drm_crtc_vblank_get(crtc); |
||
1079 | if (ret != 0) |
||
1080 | continue; |
||
1081 | |||
1082 | old_crtc_state->enable = true; |
||
1083 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
||
1084 | } |
||
1085 | |||
1086 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
||
1087 | if (!old_crtc_state->enable) |
||
1088 | continue; |
||
1089 | |||
1090 | ret = wait_event_timeout(dev->vblank[i].queue, |
||
1091 | old_crtc_state->last_vblank_count != |
||
1092 | drm_crtc_vblank_count(crtc), |
||
1093 | msecs_to_jiffies(50)); |
||
1094 | |||
1095 | drm_crtc_vblank_put(crtc); |
||
1096 | } |
||
1097 | } |
||
1098 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
||
1099 | |||
1100 | /** |
||
1101 | * drm_atomic_helper_commit - commit validated state object |
||
1102 | * @dev: DRM device |
||
1103 | * @state: the driver state object |
||
1104 | * @async: asynchronous commit |
||
1105 | * |
||
1106 | * This function commits a with drm_atomic_helper_check() pre-validated state |
||
1107 | * object. This can still fail when e.g. the framebuffer reservation fails. For |
||
1108 | * now this doesn't implement asynchronous commits. |
||
1109 | * |
||
1110 | * Note that right now this function does not support async commits, and hence |
||
1111 | * driver writers must implement their own version for now. Also note that the |
||
1112 | * default ordering of how the various stages are called is to match the legacy |
||
1113 | * modeset helper library closest. One peculiarity of that is that it doesn't |
||
1114 | * mesh well with runtime PM at all. |
||
1115 | * |
||
1116 | * For drivers supporting runtime PM the recommended sequence is |
||
1117 | * |
||
1118 | * drm_atomic_helper_commit_modeset_disables(dev, state); |
||
1119 | * |
||
1120 | * drm_atomic_helper_commit_modeset_enables(dev, state); |
||
1121 | * |
||
1122 | * drm_atomic_helper_commit_planes(dev, state, true); |
||
1123 | * |
||
1124 | * See the kerneldoc entries for these three functions for more details. |
||
1125 | * |
||
1126 | * RETURNS |
||
1127 | * Zero for success or -errno. |
||
1128 | */ |
||
1129 | int drm_atomic_helper_commit(struct drm_device *dev, |
||
1130 | struct drm_atomic_state *state, |
||
1131 | bool async) |
||
1132 | { |
||
1133 | int ret; |
||
1134 | |||
1135 | if (async) |
||
1136 | return -EBUSY; |
||
1137 | |||
1138 | ret = drm_atomic_helper_prepare_planes(dev, state); |
||
1139 | if (ret) |
||
1140 | return ret; |
||
1141 | |||
1142 | /* |
||
1143 | * This is the point of no return - everything below never fails except |
||
1144 | * when the hw goes bonghits. Which means we can commit the new state on |
||
1145 | * the software side now. |
||
1146 | */ |
||
1147 | |||
1148 | drm_atomic_helper_swap_state(dev, state); |
||
1149 | |||
1150 | /* |
||
1151 | * Everything below can be run asynchronously without the need to grab |
||
1152 | * any modeset locks at all under one condition: It must be guaranteed |
||
1153 | * that the asynchronous work has either been cancelled (if the driver |
||
1154 | * supports it, which at least requires that the framebuffers get |
||
1155 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed |
||
1156 | * before the new state gets committed on the software side with |
||
1157 | * drm_atomic_helper_swap_state(). |
||
1158 | * |
||
1159 | * This scheme allows new atomic state updates to be prepared and |
||
1160 | * checked in parallel to the asynchronous completion of the previous |
||
1161 | * update. Which is important since compositors need to figure out the |
||
1162 | * composition of the next frame right after having submitted the |
||
1163 | * current layout. |
||
1164 | */ |
||
1165 | |||
1166 | wait_for_fences(dev, state); |
||
1167 | |||
1168 | drm_atomic_helper_commit_modeset_disables(dev, state); |
||
1169 | |||
1170 | drm_atomic_helper_commit_planes(dev, state, false); |
||
1171 | |||
1172 | drm_atomic_helper_commit_modeset_enables(dev, state); |
||
1173 | |||
6088 | serge | 1174 | drm_atomic_helper_wait_for_vblanks(dev, state); |
6084 | serge | 1175 | |
1176 | drm_atomic_helper_cleanup_planes(dev, state); |
||
1177 | |||
1178 | drm_atomic_state_free(state); |
||
1179 | |||
1180 | return 0; |
||
1181 | } |
||
1182 | EXPORT_SYMBOL(drm_atomic_helper_commit); |
||
1183 | |||
1184 | /** |
||
1185 | * DOC: implementing async commit |
||
1186 | * |
||
1187 | * For now the atomic helpers don't support async commit directly. If there is |
||
1188 | * real need it could be added though, using the dma-buf fence infrastructure |
||
1189 | * for generic synchronization with outstanding rendering. |
||
1190 | * |
||
1191 | * For now drivers have to implement async commit themselves, with the following |
||
1192 | * sequence being the recommended one: |
||
1193 | * |
||
1194 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function |
||
1195 | * which commit needs to call which can fail, so we want to run it first and |
||
1196 | * synchronously. |
||
1197 | * |
||
1198 | * 2. Synchronize with any outstanding asynchronous commit worker threads which |
||
1199 | * might be affected the new state update. This can be done by either cancelling |
||
1200 | * or flushing the work items, depending upon whether the driver can deal with |
||
1201 | * cancelled updates. Note that it is important to ensure that the framebuffer |
||
1202 | * cleanup is still done when cancelling. |
||
1203 | * |
||
1204 | * For sufficient parallelism it is recommended to have a work item per crtc |
||
1205 | * (for updates which don't touch global state) and a global one. Then we only |
||
1206 | * need to synchronize with the crtc work items for changed crtcs and the global |
||
1207 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. |
||
1208 | * |
||
1209 | * 3. The software state is updated synchronously with |
||
1210 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
||
1211 | * locks means concurrent callers never see inconsistent state. And doing this |
||
1212 | * while it's guaranteed that no relevant async worker runs means that async |
||
1213 | * workers do not need grab any locks. Actually they must not grab locks, for |
||
1214 | * otherwise the work flushing will deadlock. |
||
1215 | * |
||
1216 | * 4. Schedule a work item to do all subsequent steps, using the split-out |
||
1217 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and |
||
1218 | * then cleaning up the framebuffers after the old framebuffer is no longer |
||
1219 | * being displayed. |
||
1220 | */ |
||
1221 | |||
1222 | /** |
||
1223 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
||
1224 | * @dev: DRM device |
||
1225 | * @state: atomic state object with new state structures |
||
1226 | * |
||
1227 | * This function prepares plane state, specifically framebuffers, for the new |
||
1228 | * configuration. If any failure is encountered this function will call |
||
1229 | * ->cleanup_fb on any already successfully prepared framebuffer. |
||
1230 | * |
||
1231 | * Returns: |
||
1232 | * 0 on success, negative error code on failure. |
||
1233 | */ |
||
1234 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, |
||
1235 | struct drm_atomic_state *state) |
||
1236 | { |
||
1237 | int nplanes = dev->mode_config.num_total_plane; |
||
1238 | int ret, i; |
||
1239 | |||
1240 | for (i = 0; i < nplanes; i++) { |
||
1241 | const struct drm_plane_helper_funcs *funcs; |
||
1242 | struct drm_plane *plane = state->planes[i]; |
||
1243 | struct drm_plane_state *plane_state = state->plane_states[i]; |
||
1244 | |||
1245 | if (!plane) |
||
1246 | continue; |
||
1247 | |||
1248 | funcs = plane->helper_private; |
||
1249 | |||
1250 | if (funcs->prepare_fb) { |
||
1251 | ret = funcs->prepare_fb(plane, plane_state); |
||
1252 | if (ret) |
||
1253 | goto fail; |
||
1254 | } |
||
1255 | } |
||
1256 | |||
1257 | return 0; |
||
1258 | |||
1259 | fail: |
||
1260 | for (i--; i >= 0; i--) { |
||
1261 | const struct drm_plane_helper_funcs *funcs; |
||
1262 | struct drm_plane *plane = state->planes[i]; |
||
1263 | struct drm_plane_state *plane_state = state->plane_states[i]; |
||
1264 | |||
1265 | if (!plane) |
||
1266 | continue; |
||
1267 | |||
1268 | funcs = plane->helper_private; |
||
1269 | |||
1270 | if (funcs->cleanup_fb) |
||
1271 | funcs->cleanup_fb(plane, plane_state); |
||
1272 | |||
1273 | } |
||
1274 | |||
1275 | return ret; |
||
1276 | } |
||
1277 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); |
||
1278 | |||
1279 | bool plane_crtc_active(struct drm_plane_state *state) |
||
1280 | { |
||
1281 | return state->crtc && state->crtc->state->active; |
||
1282 | } |
||
1283 | |||
1284 | /** |
||
1285 | * drm_atomic_helper_commit_planes - commit plane state |
||
1286 | * @dev: DRM device |
||
1287 | * @old_state: atomic state object with old state structures |
||
1288 | * @active_only: Only commit on active CRTC if set |
||
1289 | * |
||
1290 | * This function commits the new plane state using the plane and atomic helper |
||
1291 | * functions for planes and crtcs. It assumes that the atomic state has already |
||
1292 | * been pushed into the relevant object state pointers, since this step can no |
||
1293 | * longer fail. |
||
1294 | * |
||
1295 | * It still requires the global state object @old_state to know which planes and |
||
1296 | * crtcs need to be updated though. |
||
1297 | * |
||
1298 | * Note that this function does all plane updates across all CRTCs in one step. |
||
1299 | * If the hardware can't support this approach look at |
||
1300 | * drm_atomic_helper_commit_planes_on_crtc() instead. |
||
1301 | * |
||
1302 | * Plane parameters can be updated by applications while the associated CRTC is |
||
1303 | * disabled. The DRM/KMS core will store the parameters in the plane state, |
||
1304 | * which will be available to the driver when the CRTC is turned on. As a result |
||
1305 | * most drivers don't need to be immediately notified of plane updates for a |
||
1306 | * disabled CRTC. |
||
1307 | * |
||
1308 | * Unless otherwise needed, drivers are advised to set the @active_only |
||
1309 | * parameters to true in order not to receive plane update notifications related |
||
1310 | * to a disabled CRTC. This avoids the need to manually ignore plane updates in |
||
1311 | * driver code when the driver and/or hardware can't or just don't need to deal |
||
1312 | * with updates on disabled CRTCs, for example when supporting runtime PM. |
||
1313 | * |
||
1314 | * The drm_atomic_helper_commit() default implementation only sets @active_only |
||
1315 | * to false to most closely match the behaviour of the legacy helpers. This should |
||
1316 | * not be copied blindly by drivers. |
||
1317 | */ |
||
1318 | void drm_atomic_helper_commit_planes(struct drm_device *dev, |
||
1319 | struct drm_atomic_state *old_state, |
||
1320 | bool active_only) |
||
1321 | { |
||
1322 | struct drm_crtc *crtc; |
||
1323 | struct drm_crtc_state *old_crtc_state; |
||
1324 | struct drm_plane *plane; |
||
1325 | struct drm_plane_state *old_plane_state; |
||
1326 | int i; |
||
1327 | |||
1328 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
||
1329 | const struct drm_crtc_helper_funcs *funcs; |
||
1330 | |||
1331 | funcs = crtc->helper_private; |
||
1332 | |||
1333 | if (!funcs || !funcs->atomic_begin) |
||
1334 | continue; |
||
1335 | |||
1336 | if (active_only && !crtc->state->active) |
||
1337 | continue; |
||
1338 | |||
1339 | funcs->atomic_begin(crtc, old_crtc_state); |
||
1340 | } |
||
1341 | |||
1342 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
||
1343 | const struct drm_plane_helper_funcs *funcs; |
||
1344 | bool disabling; |
||
1345 | |||
1346 | funcs = plane->helper_private; |
||
1347 | |||
1348 | if (!funcs) |
||
1349 | continue; |
||
1350 | |||
1351 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
||
1352 | |||
1353 | if (active_only) { |
||
1354 | /* |
||
1355 | * Skip planes related to inactive CRTCs. If the plane |
||
1356 | * is enabled use the state of the current CRTC. If the |
||
1357 | * plane is being disabled use the state of the old |
||
1358 | * CRTC to avoid skipping planes being disabled on an |
||
1359 | * active CRTC. |
||
1360 | */ |
||
1361 | if (!disabling && !plane_crtc_active(plane->state)) |
||
1362 | continue; |
||
1363 | if (disabling && !plane_crtc_active(old_plane_state)) |
||
1364 | continue; |
||
1365 | } |
||
1366 | |||
1367 | /* |
||
1368 | * Special-case disabling the plane if drivers support it. |
||
1369 | */ |
||
1370 | if (disabling && funcs->atomic_disable) |
||
1371 | funcs->atomic_disable(plane, old_plane_state); |
||
1372 | else if (plane->state->crtc || disabling) |
||
1373 | funcs->atomic_update(plane, old_plane_state); |
||
1374 | } |
||
1375 | |||
1376 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
||
1377 | const struct drm_crtc_helper_funcs *funcs; |
||
1378 | |||
1379 | funcs = crtc->helper_private; |
||
1380 | |||
1381 | if (!funcs || !funcs->atomic_flush) |
||
1382 | continue; |
||
1383 | |||
1384 | if (active_only && !crtc->state->active) |
||
1385 | continue; |
||
1386 | |||
1387 | funcs->atomic_flush(crtc, old_crtc_state); |
||
1388 | } |
||
1389 | } |
||
1390 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); |
||
1391 | |||
1392 | /** |
||
1393 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc |
||
1394 | * @old_crtc_state: atomic state object with the old crtc state |
||
1395 | * |
||
1396 | * This function commits the new plane state using the plane and atomic helper |
||
1397 | * functions for planes on the specific crtc. It assumes that the atomic state |
||
1398 | * has already been pushed into the relevant object state pointers, since this |
||
1399 | * step can no longer fail. |
||
1400 | * |
||
1401 | * This function is useful when plane updates should be done crtc-by-crtc |
||
1402 | * instead of one global step like drm_atomic_helper_commit_planes() does. |
||
1403 | * |
||
1404 | * This function can only be savely used when planes are not allowed to move |
||
1405 | * between different CRTCs because this function doesn't handle inter-CRTC |
||
1406 | * depencies. Callers need to ensure that either no such depencies exist, |
||
1407 | * resolve them through ordering of commit calls or through some other means. |
||
1408 | */ |
||
1409 | void |
||
1410 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) |
||
1411 | { |
||
1412 | const struct drm_crtc_helper_funcs *crtc_funcs; |
||
1413 | struct drm_crtc *crtc = old_crtc_state->crtc; |
||
1414 | struct drm_atomic_state *old_state = old_crtc_state->state; |
||
1415 | struct drm_plane *plane; |
||
1416 | unsigned plane_mask; |
||
1417 | |||
1418 | plane_mask = old_crtc_state->plane_mask; |
||
1419 | plane_mask |= crtc->state->plane_mask; |
||
1420 | |||
1421 | crtc_funcs = crtc->helper_private; |
||
1422 | if (crtc_funcs && crtc_funcs->atomic_begin) |
||
1423 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
||
1424 | |||
1425 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { |
||
1426 | struct drm_plane_state *old_plane_state = |
||
1427 | drm_atomic_get_existing_plane_state(old_state, plane); |
||
1428 | const struct drm_plane_helper_funcs *plane_funcs; |
||
1429 | |||
1430 | plane_funcs = plane->helper_private; |
||
1431 | |||
1432 | if (!old_plane_state || !plane_funcs) |
||
1433 | continue; |
||
1434 | |||
1435 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); |
||
1436 | |||
1437 | if (drm_atomic_plane_disabling(plane, old_plane_state) && |
||
1438 | plane_funcs->atomic_disable) |
||
1439 | plane_funcs->atomic_disable(plane, old_plane_state); |
||
1440 | else if (plane->state->crtc || |
||
1441 | drm_atomic_plane_disabling(plane, old_plane_state)) |
||
1442 | plane_funcs->atomic_update(plane, old_plane_state); |
||
1443 | } |
||
1444 | |||
1445 | if (crtc_funcs && crtc_funcs->atomic_flush) |
||
1446 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
||
1447 | } |
||
1448 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); |
||
1449 | |||
1450 | /** |
||
6937 | serge | 1451 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes |
1452 | * @crtc: CRTC |
||
1453 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks |
||
1454 | * |
||
1455 | * Disables all planes associated with the given CRTC. This can be |
||
1456 | * used for instance in the CRTC helper disable callback to disable |
||
1457 | * all planes before shutting down the display pipeline. |
||
1458 | * |
||
1459 | * If the atomic-parameter is set the function calls the CRTC's |
||
1460 | * atomic_begin hook before and atomic_flush hook after disabling the |
||
1461 | * planes. |
||
1462 | * |
||
1463 | * It is a bug to call this function without having implemented the |
||
1464 | * ->atomic_disable() plane hook. |
||
1465 | */ |
||
1466 | void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, |
||
1467 | bool atomic) |
||
1468 | { |
||
1469 | const struct drm_crtc_helper_funcs *crtc_funcs = |
||
1470 | crtc->helper_private; |
||
1471 | struct drm_plane *plane; |
||
1472 | |||
1473 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) |
||
1474 | crtc_funcs->atomic_begin(crtc, NULL); |
||
1475 | |||
1476 | drm_for_each_plane(plane, crtc->dev) { |
||
1477 | const struct drm_plane_helper_funcs *plane_funcs = |
||
1478 | plane->helper_private; |
||
1479 | |||
1480 | if (plane->state->crtc != crtc || !plane_funcs) |
||
1481 | continue; |
||
1482 | |||
1483 | WARN_ON(!plane_funcs->atomic_disable); |
||
1484 | if (plane_funcs->atomic_disable) |
||
1485 | plane_funcs->atomic_disable(plane, NULL); |
||
1486 | } |
||
1487 | |||
1488 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) |
||
1489 | crtc_funcs->atomic_flush(crtc, NULL); |
||
1490 | } |
||
1491 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); |
||
1492 | |||
1493 | /** |
||
6084 | serge | 1494 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit |
1495 | * @dev: DRM device |
||
1496 | * @old_state: atomic state object with old state structures |
||
1497 | * |
||
1498 | * This function cleans up plane state, specifically framebuffers, from the old |
||
1499 | * configuration. Hence the old configuration must be perserved in @old_state to |
||
1500 | * be able to call this function. |
||
1501 | * |
||
1502 | * This function must also be called on the new state when the atomic update |
||
1503 | * fails at any point after calling drm_atomic_helper_prepare_planes(). |
||
1504 | */ |
||
1505 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, |
||
1506 | struct drm_atomic_state *old_state) |
||
1507 | { |
||
1508 | struct drm_plane *plane; |
||
1509 | struct drm_plane_state *plane_state; |
||
1510 | int i; |
||
1511 | |||
1512 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
||
1513 | const struct drm_plane_helper_funcs *funcs; |
||
1514 | |||
1515 | funcs = plane->helper_private; |
||
1516 | |||
1517 | if (funcs->cleanup_fb) |
||
1518 | funcs->cleanup_fb(plane, plane_state); |
||
1519 | } |
||
1520 | } |
||
1521 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); |
||
1522 | |||
1523 | /** |
||
1524 | * drm_atomic_helper_swap_state - store atomic state into current sw state |
||
1525 | * @dev: DRM device |
||
1526 | * @state: atomic state |
||
1527 | * |
||
1528 | * This function stores the atomic state into the current state pointers in all |
||
1529 | * driver objects. It should be called after all failing steps have been done |
||
1530 | * and succeeded, but before the actual hardware state is committed. |
||
1531 | * |
||
1532 | * For cleanup and error recovery the current state for all changed objects will |
||
1533 | * be swaped into @state. |
||
1534 | * |
||
1535 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: |
||
1536 | * |
||
1537 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. |
||
1538 | * |
||
1539 | * 2. Do any other steps that might fail. |
||
1540 | * |
||
1541 | * 3. Put the staged state into the current state pointers with this function. |
||
1542 | * |
||
1543 | * 4. Actually commit the hardware state. |
||
1544 | * |
||
1545 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
||
1546 | * contains the old state. Also do any other cleanup required with that state. |
||
1547 | */ |
||
1548 | void drm_atomic_helper_swap_state(struct drm_device *dev, |
||
1549 | struct drm_atomic_state *state) |
||
1550 | { |
||
1551 | int i; |
||
1552 | |||
6937 | serge | 1553 | for (i = 0; i < state->num_connector; i++) { |
6084 | serge | 1554 | struct drm_connector *connector = state->connectors[i]; |
1555 | |||
1556 | if (!connector) |
||
1557 | continue; |
||
1558 | |||
1559 | connector->state->state = state; |
||
1560 | swap(state->connector_states[i], connector->state); |
||
1561 | connector->state->state = NULL; |
||
1562 | } |
||
1563 | |||
1564 | for (i = 0; i < dev->mode_config.num_crtc; i++) { |
||
1565 | struct drm_crtc *crtc = state->crtcs[i]; |
||
1566 | |||
1567 | if (!crtc) |
||
1568 | continue; |
||
1569 | |||
1570 | crtc->state->state = state; |
||
1571 | swap(state->crtc_states[i], crtc->state); |
||
1572 | crtc->state->state = NULL; |
||
1573 | } |
||
1574 | |||
1575 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { |
||
1576 | struct drm_plane *plane = state->planes[i]; |
||
1577 | |||
1578 | if (!plane) |
||
1579 | continue; |
||
1580 | |||
1581 | plane->state->state = state; |
||
1582 | swap(state->plane_states[i], plane->state); |
||
1583 | plane->state->state = NULL; |
||
1584 | } |
||
1585 | } |
||
1586 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); |
||
1587 | |||
1588 | /** |
||
1589 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic |
||
1590 | * @plane: plane object to update |
||
1591 | * @crtc: owning CRTC of owning plane |
||
1592 | * @fb: framebuffer to flip onto plane |
||
1593 | * @crtc_x: x offset of primary plane on crtc |
||
1594 | * @crtc_y: y offset of primary plane on crtc |
||
1595 | * @crtc_w: width of primary plane rectangle on crtc |
||
1596 | * @crtc_h: height of primary plane rectangle on crtc |
||
1597 | * @src_x: x offset of @fb for panning |
||
1598 | * @src_y: y offset of @fb for panning |
||
1599 | * @src_w: width of source rectangle in @fb |
||
1600 | * @src_h: height of source rectangle in @fb |
||
1601 | * |
||
1602 | * Provides a default plane update handler using the atomic driver interface. |
||
1603 | * |
||
1604 | * RETURNS: |
||
1605 | * Zero on success, error code on failure |
||
1606 | */ |
||
1607 | int drm_atomic_helper_update_plane(struct drm_plane *plane, |
||
1608 | struct drm_crtc *crtc, |
||
1609 | struct drm_framebuffer *fb, |
||
1610 | int crtc_x, int crtc_y, |
||
1611 | unsigned int crtc_w, unsigned int crtc_h, |
||
1612 | uint32_t src_x, uint32_t src_y, |
||
1613 | uint32_t src_w, uint32_t src_h) |
||
1614 | { |
||
1615 | struct drm_atomic_state *state; |
||
1616 | struct drm_plane_state *plane_state; |
||
1617 | int ret = 0; |
||
1618 | |||
1619 | state = drm_atomic_state_alloc(plane->dev); |
||
1620 | if (!state) |
||
1621 | return -ENOMEM; |
||
1622 | |||
1623 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
||
1624 | retry: |
||
1625 | plane_state = drm_atomic_get_plane_state(state, plane); |
||
1626 | if (IS_ERR(plane_state)) { |
||
1627 | ret = PTR_ERR(plane_state); |
||
1628 | goto fail; |
||
1629 | } |
||
1630 | |||
1631 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
||
1632 | if (ret != 0) |
||
1633 | goto fail; |
||
1634 | drm_atomic_set_fb_for_plane(plane_state, fb); |
||
1635 | plane_state->crtc_x = crtc_x; |
||
1636 | plane_state->crtc_y = crtc_y; |
||
6937 | serge | 1637 | plane_state->crtc_w = crtc_w; |
6084 | serge | 1638 | plane_state->crtc_h = crtc_h; |
1639 | plane_state->src_x = src_x; |
||
1640 | plane_state->src_y = src_y; |
||
6937 | serge | 1641 | plane_state->src_w = src_w; |
6084 | serge | 1642 | plane_state->src_h = src_h; |
1643 | |||
1644 | if (plane == crtc->cursor) |
||
1645 | state->legacy_cursor_update = true; |
||
1646 | |||
1647 | ret = drm_atomic_commit(state); |
||
1648 | if (ret != 0) |
||
1649 | goto fail; |
||
1650 | |||
1651 | /* Driver takes ownership of state on successful commit. */ |
||
1652 | return 0; |
||
1653 | fail: |
||
1654 | if (ret == -EDEADLK) |
||
1655 | goto backoff; |
||
1656 | |||
1657 | drm_atomic_state_free(state); |
||
1658 | |||
1659 | return ret; |
||
1660 | backoff: |
||
1661 | drm_atomic_state_clear(state); |
||
1662 | drm_atomic_legacy_backoff(state); |
||
1663 | |||
1664 | /* |
||
1665 | * Someone might have exchanged the framebuffer while we dropped locks |
||
1666 | * in the backoff code. We need to fix up the fb refcount tracking the |
||
1667 | * core does for us. |
||
1668 | */ |
||
1669 | plane->old_fb = plane->fb; |
||
1670 | |||
1671 | goto retry; |
||
1672 | } |
||
1673 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); |
||
1674 | |||
1675 | /** |
||
1676 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic |
||
1677 | * @plane: plane to disable |
||
1678 | * |
||
1679 | * Provides a default plane disable handler using the atomic driver interface. |
||
1680 | * |
||
1681 | * RETURNS: |
||
1682 | * Zero on success, error code on failure |
||
1683 | */ |
||
1684 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) |
||
1685 | { |
||
1686 | struct drm_atomic_state *state; |
||
1687 | struct drm_plane_state *plane_state; |
||
1688 | int ret = 0; |
||
1689 | |||
1690 | /* |
||
1691 | * FIXME: Without plane->crtc set we can't get at the implicit legacy |
||
1692 | * acquire context. The real fix will be to wire the acquire ctx through |
||
1693 | * everywhere we need it, but meanwhile prevent chaos by just skipping |
||
1694 | * this noop. The critical case is the cursor ioctls which a) only grab |
||
1695 | * crtc/cursor-plane locks (so we need the crtc to get at the right |
||
1696 | * acquire context) and b) can try to disable the plane multiple times. |
||
1697 | */ |
||
1698 | if (!plane->crtc) |
||
1699 | return 0; |
||
1700 | |||
1701 | state = drm_atomic_state_alloc(plane->dev); |
||
1702 | if (!state) |
||
1703 | return -ENOMEM; |
||
1704 | |||
1705 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); |
||
1706 | retry: |
||
1707 | plane_state = drm_atomic_get_plane_state(state, plane); |
||
1708 | if (IS_ERR(plane_state)) { |
||
1709 | ret = PTR_ERR(plane_state); |
||
1710 | goto fail; |
||
1711 | } |
||
1712 | |||
1713 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
||
1714 | plane_state->state->legacy_cursor_update = true; |
||
1715 | |||
1716 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
||
1717 | if (ret != 0) |
||
1718 | goto fail; |
||
1719 | |||
1720 | ret = drm_atomic_commit(state); |
||
1721 | if (ret != 0) |
||
1722 | goto fail; |
||
1723 | |||
1724 | /* Driver takes ownership of state on successful commit. */ |
||
1725 | return 0; |
||
1726 | fail: |
||
1727 | if (ret == -EDEADLK) |
||
1728 | goto backoff; |
||
1729 | |||
1730 | drm_atomic_state_free(state); |
||
1731 | |||
1732 | return ret; |
||
1733 | backoff: |
||
1734 | drm_atomic_state_clear(state); |
||
1735 | drm_atomic_legacy_backoff(state); |
||
1736 | |||
1737 | /* |
||
1738 | * Someone might have exchanged the framebuffer while we dropped locks |
||
1739 | * in the backoff code. We need to fix up the fb refcount tracking the |
||
1740 | * core does for us. |
||
1741 | */ |
||
1742 | plane->old_fb = plane->fb; |
||
1743 | |||
1744 | goto retry; |
||
1745 | } |
||
1746 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); |
||
1747 | |||
1748 | /* just used from fb-helper and atomic-helper: */ |
||
1749 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, |
||
1750 | struct drm_plane_state *plane_state) |
||
1751 | { |
||
1752 | int ret; |
||
1753 | |||
1754 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
||
1755 | if (ret != 0) |
||
1756 | return ret; |
||
1757 | |||
1758 | drm_atomic_set_fb_for_plane(plane_state, NULL); |
||
1759 | plane_state->crtc_x = 0; |
||
1760 | plane_state->crtc_y = 0; |
||
6937 | serge | 1761 | plane_state->crtc_w = 0; |
6084 | serge | 1762 | plane_state->crtc_h = 0; |
1763 | plane_state->src_x = 0; |
||
1764 | plane_state->src_y = 0; |
||
6937 | serge | 1765 | plane_state->src_w = 0; |
6084 | serge | 1766 | plane_state->src_h = 0; |
1767 | |||
1768 | return 0; |
||
1769 | } |
||
1770 | |||
1771 | static int update_output_state(struct drm_atomic_state *state, |
||
1772 | struct drm_mode_set *set) |
||
1773 | { |
||
1774 | struct drm_device *dev = set->crtc->dev; |
||
1775 | struct drm_crtc *crtc; |
||
1776 | struct drm_crtc_state *crtc_state; |
||
1777 | struct drm_connector *connector; |
||
1778 | struct drm_connector_state *conn_state; |
||
7144 | serge | 1779 | int ret, i; |
6084 | serge | 1780 | |
1781 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, |
||
1782 | state->acquire_ctx); |
||
1783 | if (ret) |
||
1784 | return ret; |
||
1785 | |||
7144 | serge | 1786 | /* First disable all connectors on the target crtc. */ |
1787 | ret = drm_atomic_add_affected_connectors(state, set->crtc); |
||
1788 | if (ret) |
||
1789 | return ret; |
||
6084 | serge | 1790 | |
1791 | for_each_connector_in_state(state, connector, conn_state, i) { |
||
1792 | if (conn_state->crtc == set->crtc) { |
||
1793 | ret = drm_atomic_set_crtc_for_connector(conn_state, |
||
1794 | NULL); |
||
1795 | if (ret) |
||
1796 | return ret; |
||
1797 | } |
||
7144 | serge | 1798 | } |
6084 | serge | 1799 | |
7144 | serge | 1800 | /* Then set all connectors from set->connectors on the target crtc */ |
1801 | for (i = 0; i < set->num_connectors; i++) { |
||
1802 | conn_state = drm_atomic_get_connector_state(state, |
||
1803 | set->connectors[i]); |
||
1804 | if (IS_ERR(conn_state)) |
||
1805 | return PTR_ERR(conn_state); |
||
1806 | |||
1807 | ret = drm_atomic_set_crtc_for_connector(conn_state, |
||
1808 | set->crtc); |
||
1809 | if (ret) |
||
1810 | return ret; |
||
6084 | serge | 1811 | } |
1812 | |||
1813 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
||
1814 | /* Don't update ->enable for the CRTC in the set_config request, |
||
1815 | * since a mismatch would indicate a bug in the upper layers. |
||
1816 | * The actual modeset code later on will catch any |
||
1817 | * inconsistencies here. */ |
||
1818 | if (crtc == set->crtc) |
||
1819 | continue; |
||
1820 | |||
6937 | serge | 1821 | if (!crtc_state->connector_mask) { |
6084 | serge | 1822 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
1823 | NULL); |
||
1824 | if (ret < 0) |
||
1825 | return ret; |
||
1826 | |||
1827 | crtc_state->active = false; |
||
1828 | } |
||
1829 | } |
||
1830 | |||
1831 | return 0; |
||
1832 | } |
||
1833 | |||
1834 | /** |
||
1835 | * drm_atomic_helper_set_config - set a new config from userspace |
||
1836 | * @set: mode set configuration |
||
1837 | * |
||
1838 | * Provides a default crtc set_config handler using the atomic driver interface. |
||
1839 | * |
||
1840 | * Returns: |
||
1841 | * Returns 0 on success, negative errno numbers on failure. |
||
1842 | */ |
||
1843 | int drm_atomic_helper_set_config(struct drm_mode_set *set) |
||
1844 | { |
||
1845 | struct drm_atomic_state *state; |
||
1846 | struct drm_crtc *crtc = set->crtc; |
||
1847 | int ret = 0; |
||
1848 | |||
1849 | state = drm_atomic_state_alloc(crtc->dev); |
||
1850 | if (!state) |
||
1851 | return -ENOMEM; |
||
1852 | |||
7144 | serge | 1853 | state->legacy_set_config = true; |
6084 | serge | 1854 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
1855 | retry: |
||
1856 | ret = __drm_atomic_helper_set_config(set, state); |
||
1857 | if (ret != 0) |
||
1858 | goto fail; |
||
1859 | |||
1860 | ret = drm_atomic_commit(state); |
||
1861 | if (ret != 0) |
||
1862 | goto fail; |
||
1863 | |||
1864 | /* Driver takes ownership of state on successful commit. */ |
||
1865 | return 0; |
||
1866 | fail: |
||
1867 | if (ret == -EDEADLK) |
||
1868 | goto backoff; |
||
1869 | |||
1870 | drm_atomic_state_free(state); |
||
1871 | |||
1872 | return ret; |
||
1873 | backoff: |
||
1874 | drm_atomic_state_clear(state); |
||
1875 | drm_atomic_legacy_backoff(state); |
||
1876 | |||
1877 | /* |
||
1878 | * Someone might have exchanged the framebuffer while we dropped locks |
||
1879 | * in the backoff code. We need to fix up the fb refcount tracking the |
||
1880 | * core does for us. |
||
1881 | */ |
||
1882 | crtc->primary->old_fb = crtc->primary->fb; |
||
1883 | |||
1884 | goto retry; |
||
1885 | } |
||
1886 | EXPORT_SYMBOL(drm_atomic_helper_set_config); |
||
1887 | |||
1888 | /* just used from fb-helper and atomic-helper: */ |
||
1889 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, |
||
1890 | struct drm_atomic_state *state) |
||
1891 | { |
||
1892 | struct drm_crtc_state *crtc_state; |
||
1893 | struct drm_plane_state *primary_state; |
||
1894 | struct drm_crtc *crtc = set->crtc; |
||
1895 | int hdisplay, vdisplay; |
||
1896 | int ret; |
||
1897 | |||
1898 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
||
1899 | if (IS_ERR(crtc_state)) |
||
1900 | return PTR_ERR(crtc_state); |
||
1901 | |||
1902 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); |
||
1903 | if (IS_ERR(primary_state)) |
||
1904 | return PTR_ERR(primary_state); |
||
1905 | |||
1906 | if (!set->mode) { |
||
1907 | WARN_ON(set->fb); |
||
1908 | WARN_ON(set->num_connectors); |
||
1909 | |||
1910 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
||
1911 | if (ret != 0) |
||
1912 | return ret; |
||
1913 | |||
1914 | crtc_state->active = false; |
||
1915 | |||
1916 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
||
1917 | if (ret != 0) |
||
1918 | return ret; |
||
1919 | |||
1920 | drm_atomic_set_fb_for_plane(primary_state, NULL); |
||
1921 | |||
1922 | goto commit; |
||
1923 | } |
||
1924 | |||
1925 | WARN_ON(!set->fb); |
||
1926 | WARN_ON(!set->num_connectors); |
||
1927 | |||
1928 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
||
1929 | if (ret != 0) |
||
1930 | return ret; |
||
1931 | |||
1932 | crtc_state->active = true; |
||
1933 | |||
1934 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
||
1935 | if (ret != 0) |
||
1936 | return ret; |
||
1937 | |||
1938 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
||
1939 | |||
1940 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
||
1941 | primary_state->crtc_x = 0; |
||
1942 | primary_state->crtc_y = 0; |
||
6937 | serge | 1943 | primary_state->crtc_w = hdisplay; |
6084 | serge | 1944 | primary_state->crtc_h = vdisplay; |
1945 | primary_state->src_x = set->x << 16; |
||
1946 | primary_state->src_y = set->y << 16; |
||
1947 | if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) { |
||
6937 | serge | 1948 | primary_state->src_w = vdisplay << 16; |
6084 | serge | 1949 | primary_state->src_h = hdisplay << 16; |
1950 | } else { |
||
6937 | serge | 1951 | primary_state->src_w = hdisplay << 16; |
6084 | serge | 1952 | primary_state->src_h = vdisplay << 16; |
1953 | } |
||
1954 | |||
1955 | commit: |
||
1956 | ret = update_output_state(state, set); |
||
1957 | if (ret) |
||
1958 | return ret; |
||
1959 | |||
1960 | return 0; |
||
1961 | } |
||
1962 | |||
1963 | /** |
||
6937 | serge | 1964 | * drm_atomic_helper_disable_all - disable all currently active outputs |
1965 | * @dev: DRM device |
||
1966 | * @ctx: lock acquisition context |
||
1967 | * |
||
1968 | * Loops through all connectors, finding those that aren't turned off and then |
||
1969 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC |
||
1970 | * that they are connected to. |
||
1971 | * |
||
1972 | * This is used for example in suspend/resume to disable all currently active |
||
1973 | * functions when suspending. |
||
1974 | * |
||
1975 | * Note that if callers haven't already acquired all modeset locks this might |
||
1976 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). |
||
1977 | * |
||
1978 | * Returns: |
||
1979 | * 0 on success or a negative error code on failure. |
||
1980 | * |
||
1981 | * See also: |
||
1982 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() |
||
1983 | */ |
||
1984 | int drm_atomic_helper_disable_all(struct drm_device *dev, |
||
1985 | struct drm_modeset_acquire_ctx *ctx) |
||
1986 | { |
||
1987 | struct drm_atomic_state *state; |
||
1988 | struct drm_connector *conn; |
||
1989 | int err; |
||
1990 | |||
1991 | state = drm_atomic_state_alloc(dev); |
||
1992 | if (!state) |
||
1993 | return -ENOMEM; |
||
1994 | |||
1995 | state->acquire_ctx = ctx; |
||
1996 | |||
1997 | drm_for_each_connector(conn, dev) { |
||
1998 | struct drm_crtc *crtc = conn->state->crtc; |
||
1999 | struct drm_crtc_state *crtc_state; |
||
2000 | |||
2001 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) |
||
2002 | continue; |
||
2003 | |||
2004 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
||
2005 | if (IS_ERR(crtc_state)) { |
||
2006 | err = PTR_ERR(crtc_state); |
||
2007 | goto free; |
||
2008 | } |
||
2009 | |||
2010 | crtc_state->active = false; |
||
2011 | } |
||
2012 | |||
2013 | err = drm_atomic_commit(state); |
||
2014 | |||
2015 | free: |
||
2016 | if (err < 0) |
||
2017 | drm_atomic_state_free(state); |
||
2018 | |||
2019 | return err; |
||
2020 | } |
||
2021 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); |
||
2022 | |||
2023 | /** |
||
2024 | * drm_atomic_helper_suspend - subsystem-level suspend helper |
||
2025 | * @dev: DRM device |
||
2026 | * |
||
2027 | * Duplicates the current atomic state, disables all active outputs and then |
||
2028 | * returns a pointer to the original atomic state to the caller. Drivers can |
||
2029 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to |
||
2030 | * restore the output configuration that was active at the time the system |
||
2031 | * entered suspend. |
||
2032 | * |
||
2033 | * Note that it is potentially unsafe to use this. The atomic state object |
||
2034 | * returned by this function is assumed to be persistent. Drivers must ensure |
||
2035 | * that this holds true. Before calling this function, drivers must make sure |
||
2036 | * to suspend fbdev emulation so that nothing can be using the device. |
||
2037 | * |
||
2038 | * Returns: |
||
2039 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- |
||
2040 | * encoded error code on failure. Drivers should store the returned atomic |
||
2041 | * state object and pass it to the drm_atomic_helper_resume() helper upon |
||
2042 | * resume. |
||
2043 | * |
||
2044 | * See also: |
||
2045 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), |
||
2046 | * drm_atomic_helper_resume() |
||
2047 | */ |
||
2048 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) |
||
2049 | { |
||
2050 | struct drm_modeset_acquire_ctx ctx; |
||
2051 | struct drm_atomic_state *state; |
||
2052 | int err; |
||
2053 | |||
2054 | drm_modeset_acquire_init(&ctx, 0); |
||
2055 | |||
2056 | retry: |
||
2057 | err = drm_modeset_lock_all_ctx(dev, &ctx); |
||
2058 | if (err < 0) { |
||
2059 | state = ERR_PTR(err); |
||
2060 | goto unlock; |
||
2061 | } |
||
2062 | |||
2063 | state = drm_atomic_helper_duplicate_state(dev, &ctx); |
||
2064 | if (IS_ERR(state)) |
||
2065 | goto unlock; |
||
2066 | |||
2067 | err = drm_atomic_helper_disable_all(dev, &ctx); |
||
2068 | if (err < 0) { |
||
2069 | drm_atomic_state_free(state); |
||
2070 | state = ERR_PTR(err); |
||
2071 | goto unlock; |
||
2072 | } |
||
2073 | |||
2074 | unlock: |
||
2075 | if (PTR_ERR(state) == -EDEADLK) { |
||
2076 | drm_modeset_backoff(&ctx); |
||
2077 | goto retry; |
||
2078 | } |
||
2079 | |||
2080 | drm_modeset_drop_locks(&ctx); |
||
2081 | drm_modeset_acquire_fini(&ctx); |
||
2082 | return state; |
||
2083 | } |
||
2084 | EXPORT_SYMBOL(drm_atomic_helper_suspend); |
||
2085 | |||
2086 | /** |
||
2087 | * drm_atomic_helper_resume - subsystem-level resume helper |
||
2088 | * @dev: DRM device |
||
2089 | * @state: atomic state to resume to |
||
2090 | * |
||
2091 | * Calls drm_mode_config_reset() to synchronize hardware and software states, |
||
2092 | * grabs all modeset locks and commits the atomic state object. This can be |
||
2093 | * used in conjunction with the drm_atomic_helper_suspend() helper to |
||
2094 | * implement suspend/resume for drivers that support atomic mode-setting. |
||
2095 | * |
||
2096 | * Returns: |
||
2097 | * 0 on success or a negative error code on failure. |
||
2098 | * |
||
2099 | * See also: |
||
2100 | * drm_atomic_helper_suspend() |
||
2101 | */ |
||
2102 | int drm_atomic_helper_resume(struct drm_device *dev, |
||
2103 | struct drm_atomic_state *state) |
||
2104 | { |
||
2105 | struct drm_mode_config *config = &dev->mode_config; |
||
2106 | int err; |
||
2107 | |||
2108 | drm_mode_config_reset(dev); |
||
2109 | drm_modeset_lock_all(dev); |
||
2110 | state->acquire_ctx = config->acquire_ctx; |
||
2111 | err = drm_atomic_commit(state); |
||
2112 | drm_modeset_unlock_all(dev); |
||
2113 | |||
2114 | return err; |
||
2115 | } |
||
2116 | EXPORT_SYMBOL(drm_atomic_helper_resume); |
||
2117 | |||
2118 | /** |
||
6084 | serge | 2119 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
2120 | * @crtc: DRM crtc |
||
2121 | * @property: DRM property |
||
2122 | * @val: value of property |
||
2123 | * |
||
2124 | * Provides a default crtc set_property handler using the atomic driver |
||
2125 | * interface. |
||
2126 | * |
||
2127 | * RETURNS: |
||
2128 | * Zero on success, error code on failure |
||
2129 | */ |
||
2130 | int |
||
2131 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, |
||
2132 | struct drm_property *property, |
||
2133 | uint64_t val) |
||
2134 | { |
||
2135 | struct drm_atomic_state *state; |
||
2136 | struct drm_crtc_state *crtc_state; |
||
2137 | int ret = 0; |
||
2138 | |||
2139 | state = drm_atomic_state_alloc(crtc->dev); |
||
2140 | if (!state) |
||
2141 | return -ENOMEM; |
||
2142 | |||
2143 | /* ->set_property is always called with all locks held. */ |
||
2144 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; |
||
2145 | retry: |
||
2146 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
||
2147 | if (IS_ERR(crtc_state)) { |
||
2148 | ret = PTR_ERR(crtc_state); |
||
2149 | goto fail; |
||
2150 | } |
||
2151 | |||
2152 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
||
2153 | property, val); |
||
2154 | if (ret) |
||
2155 | goto fail; |
||
2156 | |||
2157 | ret = drm_atomic_commit(state); |
||
2158 | if (ret != 0) |
||
2159 | goto fail; |
||
2160 | |||
2161 | /* Driver takes ownership of state on successful commit. */ |
||
2162 | return 0; |
||
2163 | fail: |
||
2164 | if (ret == -EDEADLK) |
||
2165 | goto backoff; |
||
2166 | |||
2167 | drm_atomic_state_free(state); |
||
2168 | |||
2169 | return ret; |
||
2170 | backoff: |
||
2171 | drm_atomic_state_clear(state); |
||
2172 | drm_atomic_legacy_backoff(state); |
||
2173 | |||
2174 | goto retry; |
||
2175 | } |
||
2176 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); |
||
2177 | |||
2178 | /** |
||
2179 | * drm_atomic_helper_plane_set_property - helper for plane properties |
||
2180 | * @plane: DRM plane |
||
2181 | * @property: DRM property |
||
2182 | * @val: value of property |
||
2183 | * |
||
2184 | * Provides a default plane set_property handler using the atomic driver |
||
2185 | * interface. |
||
2186 | * |
||
2187 | * RETURNS: |
||
2188 | * Zero on success, error code on failure |
||
2189 | */ |
||
2190 | int |
||
2191 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, |
||
2192 | struct drm_property *property, |
||
2193 | uint64_t val) |
||
2194 | { |
||
2195 | struct drm_atomic_state *state; |
||
2196 | struct drm_plane_state *plane_state; |
||
2197 | int ret = 0; |
||
2198 | |||
2199 | state = drm_atomic_state_alloc(plane->dev); |
||
2200 | if (!state) |
||
2201 | return -ENOMEM; |
||
2202 | |||
2203 | /* ->set_property is always called with all locks held. */ |
||
2204 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; |
||
2205 | retry: |
||
2206 | plane_state = drm_atomic_get_plane_state(state, plane); |
||
2207 | if (IS_ERR(plane_state)) { |
||
2208 | ret = PTR_ERR(plane_state); |
||
2209 | goto fail; |
||
2210 | } |
||
2211 | |||
2212 | ret = drm_atomic_plane_set_property(plane, plane_state, |
||
2213 | property, val); |
||
2214 | if (ret) |
||
2215 | goto fail; |
||
2216 | |||
2217 | ret = drm_atomic_commit(state); |
||
2218 | if (ret != 0) |
||
2219 | goto fail; |
||
2220 | |||
2221 | /* Driver takes ownership of state on successful commit. */ |
||
2222 | return 0; |
||
2223 | fail: |
||
2224 | if (ret == -EDEADLK) |
||
2225 | goto backoff; |
||
2226 | |||
2227 | drm_atomic_state_free(state); |
||
2228 | |||
2229 | return ret; |
||
2230 | backoff: |
||
2231 | drm_atomic_state_clear(state); |
||
2232 | drm_atomic_legacy_backoff(state); |
||
2233 | |||
2234 | goto retry; |
||
2235 | } |
||
2236 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); |
||
2237 | |||
2238 | /** |
||
2239 | * drm_atomic_helper_connector_set_property - helper for connector properties |
||
2240 | * @connector: DRM connector |
||
2241 | * @property: DRM property |
||
2242 | * @val: value of property |
||
2243 | * |
||
2244 | * Provides a default connector set_property handler using the atomic driver |
||
2245 | * interface. |
||
2246 | * |
||
2247 | * RETURNS: |
||
2248 | * Zero on success, error code on failure |
||
2249 | */ |
||
2250 | int |
||
2251 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, |
||
2252 | struct drm_property *property, |
||
2253 | uint64_t val) |
||
2254 | { |
||
2255 | struct drm_atomic_state *state; |
||
2256 | struct drm_connector_state *connector_state; |
||
2257 | int ret = 0; |
||
2258 | |||
2259 | state = drm_atomic_state_alloc(connector->dev); |
||
2260 | if (!state) |
||
2261 | return -ENOMEM; |
||
2262 | |||
2263 | /* ->set_property is always called with all locks held. */ |
||
2264 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; |
||
2265 | retry: |
||
2266 | connector_state = drm_atomic_get_connector_state(state, connector); |
||
2267 | if (IS_ERR(connector_state)) { |
||
2268 | ret = PTR_ERR(connector_state); |
||
2269 | goto fail; |
||
2270 | } |
||
2271 | |||
2272 | ret = drm_atomic_connector_set_property(connector, connector_state, |
||
2273 | property, val); |
||
2274 | if (ret) |
||
2275 | goto fail; |
||
2276 | |||
2277 | ret = drm_atomic_commit(state); |
||
2278 | if (ret != 0) |
||
2279 | goto fail; |
||
2280 | |||
2281 | /* Driver takes ownership of state on successful commit. */ |
||
2282 | return 0; |
||
2283 | fail: |
||
2284 | if (ret == -EDEADLK) |
||
2285 | goto backoff; |
||
2286 | |||
2287 | drm_atomic_state_free(state); |
||
2288 | |||
2289 | return ret; |
||
2290 | backoff: |
||
2291 | drm_atomic_state_clear(state); |
||
2292 | drm_atomic_legacy_backoff(state); |
||
2293 | |||
2294 | goto retry; |
||
2295 | } |
||
2296 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); |
||
2297 | |||
2298 | /** |
||
2299 | * drm_atomic_helper_page_flip - execute a legacy page flip |
||
2300 | * @crtc: DRM crtc |
||
2301 | * @fb: DRM framebuffer |
||
2302 | * @event: optional DRM event to signal upon completion |
||
2303 | * @flags: flip flags for non-vblank sync'ed updates |
||
2304 | * |
||
2305 | * Provides a default page flip implementation using the atomic driver interface. |
||
2306 | * |
||
2307 | * Note that for now so called async page flips (i.e. updates which are not |
||
2308 | * synchronized to vblank) are not supported, since the atomic interfaces have |
||
2309 | * no provisions for this yet. |
||
2310 | * |
||
2311 | * Returns: |
||
2312 | * Returns 0 on success, negative errno numbers on failure. |
||
2313 | */ |
||
2314 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, |
||
2315 | struct drm_framebuffer *fb, |
||
2316 | struct drm_pending_vblank_event *event, |
||
2317 | uint32_t flags) |
||
2318 | { |
||
2319 | struct drm_plane *plane = crtc->primary; |
||
2320 | struct drm_atomic_state *state; |
||
2321 | struct drm_plane_state *plane_state; |
||
2322 | struct drm_crtc_state *crtc_state; |
||
2323 | int ret = 0; |
||
2324 | |||
2325 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) |
||
2326 | return -EINVAL; |
||
2327 | |||
2328 | state = drm_atomic_state_alloc(plane->dev); |
||
2329 | if (!state) |
||
2330 | return -ENOMEM; |
||
2331 | |||
2332 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
||
2333 | retry: |
||
2334 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
||
2335 | if (IS_ERR(crtc_state)) { |
||
2336 | ret = PTR_ERR(crtc_state); |
||
2337 | goto fail; |
||
2338 | } |
||
2339 | crtc_state->event = event; |
||
2340 | |||
2341 | plane_state = drm_atomic_get_plane_state(state, plane); |
||
2342 | if (IS_ERR(plane_state)) { |
||
2343 | ret = PTR_ERR(plane_state); |
||
2344 | goto fail; |
||
2345 | } |
||
2346 | |||
2347 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
||
2348 | if (ret != 0) |
||
2349 | goto fail; |
||
2350 | drm_atomic_set_fb_for_plane(plane_state, fb); |
||
2351 | |||
6937 | serge | 2352 | /* Make sure we don't accidentally do a full modeset. */ |
2353 | state->allow_modeset = false; |
||
2354 | if (!crtc_state->active) { |
||
2355 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", |
||
2356 | crtc->base.id); |
||
2357 | ret = -EINVAL; |
||
2358 | goto fail; |
||
2359 | } |
||
2360 | |||
6084 | serge | 2361 | ret = drm_atomic_async_commit(state); |
2362 | if (ret != 0) |
||
2363 | goto fail; |
||
2364 | |||
2365 | /* Driver takes ownership of state on successful async commit. */ |
||
2366 | return 0; |
||
2367 | fail: |
||
2368 | if (ret == -EDEADLK) |
||
2369 | goto backoff; |
||
2370 | |||
2371 | drm_atomic_state_free(state); |
||
2372 | |||
2373 | return ret; |
||
2374 | backoff: |
||
2375 | drm_atomic_state_clear(state); |
||
2376 | drm_atomic_legacy_backoff(state); |
||
2377 | |||
2378 | /* |
||
2379 | * Someone might have exchanged the framebuffer while we dropped locks |
||
2380 | * in the backoff code. We need to fix up the fb refcount tracking the |
||
2381 | * core does for us. |
||
2382 | */ |
||
2383 | plane->old_fb = plane->fb; |
||
2384 | |||
2385 | goto retry; |
||
2386 | } |
||
2387 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); |
||
2388 | |||
2389 | /** |
||
2390 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation |
||
2391 | * @connector: affected connector |
||
2392 | * @mode: DPMS mode |
||
2393 | * |
||
2394 | * This is the main helper function provided by the atomic helper framework for |
||
2395 | * implementing the legacy DPMS connector interface. It computes the new desired |
||
2396 | * ->active state for the corresponding CRTC (if the connector is enabled) and |
||
2397 | * updates it. |
||
2398 | * |
||
2399 | * Returns: |
||
2400 | * Returns 0 on success, negative errno numbers on failure. |
||
2401 | */ |
||
2402 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
||
2403 | int mode) |
||
2404 | { |
||
2405 | struct drm_mode_config *config = &connector->dev->mode_config; |
||
2406 | struct drm_atomic_state *state; |
||
2407 | struct drm_crtc_state *crtc_state; |
||
2408 | struct drm_crtc *crtc; |
||
2409 | struct drm_connector *tmp_connector; |
||
2410 | int ret; |
||
2411 | bool active = false; |
||
2412 | int old_mode = connector->dpms; |
||
2413 | |||
2414 | if (mode != DRM_MODE_DPMS_ON) |
||
2415 | mode = DRM_MODE_DPMS_OFF; |
||
2416 | |||
2417 | connector->dpms = mode; |
||
2418 | crtc = connector->state->crtc; |
||
2419 | |||
2420 | if (!crtc) |
||
2421 | return 0; |
||
2422 | |||
2423 | state = drm_atomic_state_alloc(connector->dev); |
||
2424 | if (!state) |
||
2425 | return -ENOMEM; |
||
2426 | |||
2427 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
||
2428 | retry: |
||
2429 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
||
2430 | if (IS_ERR(crtc_state)) { |
||
2431 | ret = PTR_ERR(crtc_state); |
||
2432 | goto fail; |
||
2433 | } |
||
2434 | |||
2435 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); |
||
2436 | |||
2437 | drm_for_each_connector(tmp_connector, connector->dev) { |
||
2438 | if (tmp_connector->state->crtc != crtc) |
||
2439 | continue; |
||
2440 | |||
2441 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
||
2442 | active = true; |
||
2443 | break; |
||
2444 | } |
||
2445 | } |
||
2446 | crtc_state->active = active; |
||
2447 | |||
2448 | ret = drm_atomic_commit(state); |
||
2449 | if (ret != 0) |
||
2450 | goto fail; |
||
2451 | |||
2452 | /* Driver takes ownership of state on successful commit. */ |
||
2453 | return 0; |
||
2454 | fail: |
||
2455 | if (ret == -EDEADLK) |
||
2456 | goto backoff; |
||
2457 | |||
2458 | connector->dpms = old_mode; |
||
2459 | drm_atomic_state_free(state); |
||
2460 | |||
2461 | return ret; |
||
2462 | backoff: |
||
2463 | drm_atomic_state_clear(state); |
||
2464 | drm_atomic_legacy_backoff(state); |
||
2465 | |||
2466 | goto retry; |
||
2467 | } |
||
2468 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); |
||
2469 | |||
2470 | /** |
||
2471 | * DOC: atomic state reset and initialization |
||
2472 | * |
||
2473 | * Both the drm core and the atomic helpers assume that there is always the full |
||
2474 | * and correct atomic software state for all connectors, CRTCs and planes |
||
2475 | * available. Which is a bit a problem on driver load and also after system |
||
2476 | * suspend. One way to solve this is to have a hardware state read-out |
||
2477 | * infrastructure which reconstructs the full software state (e.g. the i915 |
||
2478 | * driver). |
||
2479 | * |
||
2480 | * The simpler solution is to just reset the software state to everything off, |
||
2481 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this |
||
2482 | * the atomic helpers provide default reset implementations for all hooks. |
||
6937 | serge | 2483 | * |
2484 | * On the upside the precise state tracking of atomic simplifies system suspend |
||
2485 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe |
||
2486 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). |
||
2487 | * For other drivers the building blocks are split out, see the documentation |
||
2488 | * for these functions. |
||
6084 | serge | 2489 | */ |
2490 | |||
2491 | /** |
||
2492 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs |
||
2493 | * @crtc: drm CRTC |
||
2494 | * |
||
2495 | * Resets the atomic state for @crtc by freeing the state pointer (which might |
||
2496 | * be NULL, e.g. at driver load time) and allocating a new empty state object. |
||
2497 | */ |
||
2498 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) |
||
2499 | { |
||
7144 | serge | 2500 | if (crtc->state) { |
6084 | serge | 2501 | drm_property_unreference_blob(crtc->state->mode_blob); |
7144 | serge | 2502 | drm_property_unreference_blob(crtc->state->degamma_lut); |
2503 | drm_property_unreference_blob(crtc->state->ctm); |
||
2504 | drm_property_unreference_blob(crtc->state->gamma_lut); |
||
2505 | } |
||
6084 | serge | 2506 | kfree(crtc->state); |
2507 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); |
||
2508 | |||
2509 | if (crtc->state) |
||
2510 | crtc->state->crtc = crtc; |
||
2511 | } |
||
2512 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); |
||
2513 | |||
2514 | /** |
||
2515 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state |
||
2516 | * @crtc: CRTC object |
||
2517 | * @state: atomic CRTC state |
||
2518 | * |
||
2519 | * Copies atomic state from a CRTC's current state and resets inferred values. |
||
2520 | * This is useful for drivers that subclass the CRTC state. |
||
2521 | */ |
||
2522 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, |
||
2523 | struct drm_crtc_state *state) |
||
2524 | { |
||
2525 | memcpy(state, crtc->state, sizeof(*state)); |
||
2526 | |||
2527 | if (state->mode_blob) |
||
2528 | drm_property_reference_blob(state->mode_blob); |
||
7144 | serge | 2529 | if (state->degamma_lut) |
2530 | drm_property_reference_blob(state->degamma_lut); |
||
2531 | if (state->ctm) |
||
2532 | drm_property_reference_blob(state->ctm); |
||
2533 | if (state->gamma_lut) |
||
2534 | drm_property_reference_blob(state->gamma_lut); |
||
6084 | serge | 2535 | state->mode_changed = false; |
2536 | state->active_changed = false; |
||
2537 | state->planes_changed = false; |
||
2538 | state->connectors_changed = false; |
||
7144 | serge | 2539 | state->color_mgmt_changed = false; |
6084 | serge | 2540 | state->event = NULL; |
2541 | } |
||
2542 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); |
||
2543 | |||
2544 | /** |
||
2545 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook |
||
2546 | * @crtc: drm CRTC |
||
2547 | * |
||
2548 | * Default CRTC state duplicate hook for drivers which don't have their own |
||
2549 | * subclassed CRTC state structure. |
||
2550 | */ |
||
2551 | struct drm_crtc_state * |
||
2552 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) |
||
2553 | { |
||
2554 | struct drm_crtc_state *state; |
||
2555 | |||
2556 | if (WARN_ON(!crtc->state)) |
||
2557 | return NULL; |
||
2558 | |||
2559 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
||
2560 | if (state) |
||
2561 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); |
||
2562 | |||
2563 | return state; |
||
2564 | } |
||
2565 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); |
||
2566 | |||
2567 | /** |
||
2568 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state |
||
2569 | * @crtc: CRTC object |
||
2570 | * @state: CRTC state object to release |
||
2571 | * |
||
2572 | * Releases all resources stored in the CRTC state without actually freeing |
||
2573 | * the memory of the CRTC state. This is useful for drivers that subclass the |
||
2574 | * CRTC state. |
||
2575 | */ |
||
2576 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, |
||
2577 | struct drm_crtc_state *state) |
||
2578 | { |
||
7144 | serge | 2579 | drm_property_unreference_blob(state->mode_blob); |
2580 | drm_property_unreference_blob(state->degamma_lut); |
||
2581 | drm_property_unreference_blob(state->ctm); |
||
2582 | drm_property_unreference_blob(state->gamma_lut); |
||
6084 | serge | 2583 | } |
2584 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); |
||
2585 | |||
2586 | /** |
||
2587 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook |
||
2588 | * @crtc: drm CRTC |
||
2589 | * @state: CRTC state object to release |
||
2590 | * |
||
2591 | * Default CRTC state destroy hook for drivers which don't have their own |
||
2592 | * subclassed CRTC state structure. |
||
2593 | */ |
||
2594 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, |
||
2595 | struct drm_crtc_state *state) |
||
2596 | { |
||
2597 | __drm_atomic_helper_crtc_destroy_state(crtc, state); |
||
2598 | kfree(state); |
||
2599 | } |
||
2600 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); |
||
2601 | |||
2602 | /** |
||
2603 | * drm_atomic_helper_plane_reset - default ->reset hook for planes |
||
2604 | * @plane: drm plane |
||
2605 | * |
||
2606 | * Resets the atomic state for @plane by freeing the state pointer (which might |
||
2607 | * be NULL, e.g. at driver load time) and allocating a new empty state object. |
||
2608 | */ |
||
2609 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) |
||
2610 | { |
||
2611 | if (plane->state && plane->state->fb) |
||
2612 | drm_framebuffer_unreference(plane->state->fb); |
||
2613 | |||
2614 | kfree(plane->state); |
||
2615 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); |
||
2616 | |||
7144 | serge | 2617 | if (plane->state) { |
6084 | serge | 2618 | plane->state->plane = plane; |
7144 | serge | 2619 | plane->state->rotation = BIT(DRM_ROTATE_0); |
2620 | } |
||
6084 | serge | 2621 | } |
2622 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); |
||
2623 | |||
2624 | /** |
||
2625 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state |
||
2626 | * @plane: plane object |
||
2627 | * @state: atomic plane state |
||
2628 | * |
||
2629 | * Copies atomic state from a plane's current state. This is useful for |
||
2630 | * drivers that subclass the plane state. |
||
2631 | */ |
||
2632 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, |
||
2633 | struct drm_plane_state *state) |
||
2634 | { |
||
2635 | memcpy(state, plane->state, sizeof(*state)); |
||
2636 | |||
2637 | if (state->fb) |
||
2638 | drm_framebuffer_reference(state->fb); |
||
2639 | } |
||
2640 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); |
||
2641 | |||
2642 | /** |
||
2643 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook |
||
2644 | * @plane: drm plane |
||
2645 | * |
||
2646 | * Default plane state duplicate hook for drivers which don't have their own |
||
2647 | * subclassed plane state structure. |
||
2648 | */ |
||
2649 | struct drm_plane_state * |
||
2650 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) |
||
2651 | { |
||
2652 | struct drm_plane_state *state; |
||
2653 | |||
2654 | if (WARN_ON(!plane->state)) |
||
2655 | return NULL; |
||
2656 | |||
2657 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
||
2658 | if (state) |
||
2659 | __drm_atomic_helper_plane_duplicate_state(plane, state); |
||
2660 | |||
2661 | return state; |
||
2662 | } |
||
2663 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); |
||
2664 | |||
2665 | /** |
||
2666 | * __drm_atomic_helper_plane_destroy_state - release plane state |
||
2667 | * @plane: plane object |
||
2668 | * @state: plane state object to release |
||
2669 | * |
||
2670 | * Releases all resources stored in the plane state without actually freeing |
||
2671 | * the memory of the plane state. This is useful for drivers that subclass the |
||
2672 | * plane state. |
||
2673 | */ |
||
2674 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, |
||
2675 | struct drm_plane_state *state) |
||
2676 | { |
||
2677 | if (state->fb) |
||
2678 | drm_framebuffer_unreference(state->fb); |
||
2679 | } |
||
2680 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); |
||
2681 | |||
2682 | /** |
||
2683 | * drm_atomic_helper_plane_destroy_state - default state destroy hook |
||
2684 | * @plane: drm plane |
||
2685 | * @state: plane state object to release |
||
2686 | * |
||
2687 | * Default plane state destroy hook for drivers which don't have their own |
||
2688 | * subclassed plane state structure. |
||
2689 | */ |
||
2690 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, |
||
2691 | struct drm_plane_state *state) |
||
2692 | { |
||
2693 | __drm_atomic_helper_plane_destroy_state(plane, state); |
||
2694 | kfree(state); |
||
2695 | } |
||
2696 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); |
||
2697 | |||
2698 | /** |
||
6937 | serge | 2699 | * __drm_atomic_helper_connector_reset - reset state on connector |
2700 | * @connector: drm connector |
||
2701 | * @conn_state: connector state to assign |
||
2702 | * |
||
2703 | * Initializes the newly allocated @conn_state and assigns it to |
||
2704 | * #connector ->state, usually required when initializing the drivers |
||
2705 | * or when called from the ->reset hook. |
||
2706 | * |
||
2707 | * This is useful for drivers that subclass the connector state. |
||
2708 | */ |
||
2709 | void |
||
2710 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, |
||
2711 | struct drm_connector_state *conn_state) |
||
2712 | { |
||
2713 | if (conn_state) |
||
2714 | conn_state->connector = connector; |
||
2715 | |||
2716 | connector->state = conn_state; |
||
2717 | } |
||
2718 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); |
||
2719 | |||
2720 | /** |
||
6084 | serge | 2721 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors |
2722 | * @connector: drm connector |
||
2723 | * |
||
2724 | * Resets the atomic state for @connector by freeing the state pointer (which |
||
2725 | * might be NULL, e.g. at driver load time) and allocating a new empty state |
||
2726 | * object. |
||
2727 | */ |
||
2728 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) |
||
2729 | { |
||
6937 | serge | 2730 | struct drm_connector_state *conn_state = |
2731 | kzalloc(sizeof(*conn_state), GFP_KERNEL); |
||
2732 | |||
6084 | serge | 2733 | kfree(connector->state); |
6937 | serge | 2734 | __drm_atomic_helper_connector_reset(connector, conn_state); |
6084 | serge | 2735 | } |
2736 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); |
||
2737 | |||
2738 | /** |
||
2739 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state |
||
2740 | * @connector: connector object |
||
2741 | * @state: atomic connector state |
||
2742 | * |
||
2743 | * Copies atomic state from a connector's current state. This is useful for |
||
2744 | * drivers that subclass the connector state. |
||
2745 | */ |
||
2746 | void |
||
2747 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, |
||
2748 | struct drm_connector_state *state) |
||
2749 | { |
||
2750 | memcpy(state, connector->state, sizeof(*state)); |
||
2751 | } |
||
2752 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); |
||
2753 | |||
2754 | /** |
||
2755 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook |
||
2756 | * @connector: drm connector |
||
2757 | * |
||
2758 | * Default connector state duplicate hook for drivers which don't have their own |
||
2759 | * subclassed connector state structure. |
||
2760 | */ |
||
2761 | struct drm_connector_state * |
||
2762 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) |
||
2763 | { |
||
2764 | struct drm_connector_state *state; |
||
2765 | |||
2766 | if (WARN_ON(!connector->state)) |
||
2767 | return NULL; |
||
2768 | |||
2769 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
||
2770 | if (state) |
||
2771 | __drm_atomic_helper_connector_duplicate_state(connector, state); |
||
2772 | |||
2773 | return state; |
||
2774 | } |
||
2775 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); |
||
2776 | |||
2777 | /** |
||
2778 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object |
||
2779 | * @dev: DRM device |
||
2780 | * @ctx: lock acquisition context |
||
2781 | * |
||
2782 | * Makes a copy of the current atomic state by looping over all objects and |
||
6937 | serge | 2783 | * duplicating their respective states. This is used for example by suspend/ |
2784 | * resume support code to save the state prior to suspend such that it can |
||
2785 | * be restored upon resume. |
||
6084 | serge | 2786 | * |
2787 | * Note that this treats atomic state as persistent between save and restore. |
||
2788 | * Drivers must make sure that this is possible and won't result in confusion |
||
2789 | * or erroneous behaviour. |
||
2790 | * |
||
2791 | * Note that if callers haven't already acquired all modeset locks this might |
||
2792 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). |
||
2793 | * |
||
2794 | * Returns: |
||
2795 | * A pointer to the copy of the atomic state object on success or an |
||
2796 | * ERR_PTR()-encoded error code on failure. |
||
6937 | serge | 2797 | * |
2798 | * See also: |
||
2799 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() |
||
6084 | serge | 2800 | */ |
2801 | struct drm_atomic_state * |
||
2802 | drm_atomic_helper_duplicate_state(struct drm_device *dev, |
||
2803 | struct drm_modeset_acquire_ctx *ctx) |
||
2804 | { |
||
2805 | struct drm_atomic_state *state; |
||
2806 | struct drm_connector *conn; |
||
2807 | struct drm_plane *plane; |
||
2808 | struct drm_crtc *crtc; |
||
2809 | int err = 0; |
||
2810 | |||
2811 | state = drm_atomic_state_alloc(dev); |
||
2812 | if (!state) |
||
2813 | return ERR_PTR(-ENOMEM); |
||
2814 | |||
2815 | state->acquire_ctx = ctx; |
||
2816 | |||
2817 | drm_for_each_crtc(crtc, dev) { |
||
2818 | struct drm_crtc_state *crtc_state; |
||
2819 | |||
2820 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
||
2821 | if (IS_ERR(crtc_state)) { |
||
2822 | err = PTR_ERR(crtc_state); |
||
2823 | goto free; |
||
2824 | } |
||
2825 | } |
||
2826 | |||
2827 | drm_for_each_plane(plane, dev) { |
||
2828 | struct drm_plane_state *plane_state; |
||
2829 | |||
2830 | plane_state = drm_atomic_get_plane_state(state, plane); |
||
2831 | if (IS_ERR(plane_state)) { |
||
2832 | err = PTR_ERR(plane_state); |
||
2833 | goto free; |
||
2834 | } |
||
2835 | } |
||
2836 | |||
2837 | drm_for_each_connector(conn, dev) { |
||
2838 | struct drm_connector_state *conn_state; |
||
2839 | |||
2840 | conn_state = drm_atomic_get_connector_state(state, conn); |
||
2841 | if (IS_ERR(conn_state)) { |
||
2842 | err = PTR_ERR(conn_state); |
||
2843 | goto free; |
||
2844 | } |
||
2845 | } |
||
2846 | |||
2847 | /* clear the acquire context so that it isn't accidentally reused */ |
||
2848 | state->acquire_ctx = NULL; |
||
2849 | |||
2850 | free: |
||
2851 | if (err < 0) { |
||
2852 | drm_atomic_state_free(state); |
||
2853 | state = ERR_PTR(err); |
||
2854 | } |
||
2855 | |||
2856 | return state; |
||
2857 | } |
||
2858 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); |
||
2859 | |||
2860 | /** |
||
2861 | * __drm_atomic_helper_connector_destroy_state - release connector state |
||
2862 | * @connector: connector object |
||
2863 | * @state: connector state object to release |
||
2864 | * |
||
2865 | * Releases all resources stored in the connector state without actually |
||
2866 | * freeing the memory of the connector state. This is useful for drivers that |
||
2867 | * subclass the connector state. |
||
2868 | */ |
||
2869 | void |
||
2870 | __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, |
||
2871 | struct drm_connector_state *state) |
||
2872 | { |
||
2873 | /* |
||
2874 | * This is currently a placeholder so that drivers that subclass the |
||
2875 | * state will automatically do the right thing if code is ever added |
||
2876 | * to this function. |
||
2877 | */ |
||
2878 | } |
||
2879 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); |
||
2880 | |||
2881 | /** |
||
2882 | * drm_atomic_helper_connector_destroy_state - default state destroy hook |
||
2883 | * @connector: drm connector |
||
2884 | * @state: connector state object to release |
||
2885 | * |
||
2886 | * Default connector state destroy hook for drivers which don't have their own |
||
2887 | * subclassed connector state structure. |
||
2888 | */ |
||
2889 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, |
||
2890 | struct drm_connector_state *state) |
||
2891 | { |
||
2892 | __drm_atomic_helper_connector_destroy_state(connector, state); |
||
2893 | kfree(state); |
||
2894 | } |
||
2895 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |
||
7144 | serge | 2896 | |
2897 | /** |
||
2898 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table |
||
2899 | * @crtc: CRTC object |
||
2900 | * @red: red correction table |
||
2901 | * @green: green correction table |
||
2902 | * @blue: green correction table |
||
2903 | * @start: |
||
2904 | * @size: size of the tables |
||
2905 | * |
||
2906 | * Implements support for legacy gamma correction table for drivers |
||
2907 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT |
||
2908 | * properties. |
||
2909 | */ |
||
2910 | void drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, |
||
2911 | u16 *red, u16 *green, u16 *blue, |
||
2912 | uint32_t start, uint32_t size) |
||
2913 | { |
||
2914 | struct drm_device *dev = crtc->dev; |
||
2915 | struct drm_mode_config *config = &dev->mode_config; |
||
2916 | struct drm_atomic_state *state; |
||
2917 | struct drm_crtc_state *crtc_state; |
||
2918 | struct drm_property_blob *blob = NULL; |
||
2919 | struct drm_color_lut *blob_data; |
||
2920 | int i, ret = 0; |
||
2921 | |||
2922 | state = drm_atomic_state_alloc(crtc->dev); |
||
2923 | if (!state) |
||
2924 | return; |
||
2925 | |||
2926 | blob = drm_property_create_blob(dev, |
||
2927 | sizeof(struct drm_color_lut) * size, |
||
2928 | NULL); |
||
2929 | if (IS_ERR(blob)) { |
||
2930 | ret = PTR_ERR(blob); |
||
2931 | blob = NULL; |
||
2932 | goto fail; |
||
2933 | } |
||
2934 | |||
2935 | /* Prepare GAMMA_LUT with the legacy values. */ |
||
2936 | blob_data = (struct drm_color_lut *) blob->data; |
||
2937 | for (i = 0; i < size; i++) { |
||
2938 | blob_data[i].red = red[i]; |
||
2939 | blob_data[i].green = green[i]; |
||
2940 | blob_data[i].blue = blue[i]; |
||
2941 | } |
||
2942 | |||
2943 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; |
||
2944 | retry: |
||
2945 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
||
2946 | if (IS_ERR(crtc_state)) { |
||
2947 | ret = PTR_ERR(crtc_state); |
||
2948 | goto fail; |
||
2949 | } |
||
2950 | |||
2951 | /* Reset DEGAMMA_LUT and CTM properties. */ |
||
2952 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
||
2953 | config->degamma_lut_property, 0); |
||
2954 | if (ret) |
||
2955 | goto fail; |
||
2956 | |||
2957 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
||
2958 | config->ctm_property, 0); |
||
2959 | if (ret) |
||
2960 | goto fail; |
||
2961 | |||
2962 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
||
2963 | config->gamma_lut_property, blob->base.id); |
||
2964 | if (ret) |
||
2965 | goto fail; |
||
2966 | |||
2967 | ret = drm_atomic_commit(state); |
||
2968 | if (ret) |
||
2969 | goto fail; |
||
2970 | |||
2971 | /* Driver takes ownership of state on successful commit. */ |
||
2972 | |||
2973 | drm_property_unreference_blob(blob); |
||
2974 | |||
2975 | return; |
||
2976 | fail: |
||
2977 | if (ret == -EDEADLK) |
||
2978 | goto backoff; |
||
2979 | |||
2980 | drm_atomic_state_free(state); |
||
2981 | drm_property_unreference_blob(blob); |
||
2982 | |||
2983 | return; |
||
2984 | backoff: |
||
2985 | drm_atomic_state_clear(state); |
||
2986 | drm_atomic_legacy_backoff(state); |
||
2987 | |||
2988 | goto retry; |
||
2989 | } |
||
2990 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set);>>>>>><>><>><>><>><>><>>>>>>>><>><>>><>><>><> |