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Rev | Author | Line No. | Line |
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1179 | serge | 1 | /* |
2 | * Copyright (c) 2006-2009 Red Hat Inc. |
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3 | * Copyright (c) 2006-2008 Intel Corporation |
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4 | * Copyright (c) 2007 Dave Airlie |
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5 | * |
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6 | * DRM framebuffer helper functions |
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7 | * |
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8 | * Permission to use, copy, modify, distribute, and sell this software and its |
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9 | * documentation for any purpose is hereby granted without fee, provided that |
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10 | * the above copyright notice appear in all copies and that both that copyright |
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11 | * notice and this permission notice appear in supporting documentation, and |
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12 | * that the name of the copyright holders not be used in advertising or |
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13 | * publicity pertaining to distribution of the software without specific, |
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14 | * written prior permission. The copyright holders make no representations |
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15 | * about the suitability of this software for any purpose. It is provided "as |
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16 | * is" without express or implied warranty. |
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17 | * |
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18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
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19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
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20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
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21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
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22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
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23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
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24 | * OF THIS SOFTWARE. |
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25 | * |
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26 | * Authors: |
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27 | * Dave Airlie |
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28 | * Jesse Barnes |
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29 | */ |
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3192 | Serge | 30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | |||
1430 | serge | 32 | #include |
1963 | serge | 33 | #include |
34 | #include |
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1179 | serge | 35 | #include |
3031 | serge | 36 | #include |
37 | #include |
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38 | #include |
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39 | #include |
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40 | #include |
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6084 | serge | 41 | #include |
42 | #include |
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1179 | serge | 43 | |
6084 | serge | 44 | static bool drm_fbdev_emulation = true; |
45 | module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); |
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46 | MODULE_PARM_DESC(fbdev_emulation, |
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47 | "Enable legacy fbdev emulation [default=true]"); |
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48 | |||
1179 | serge | 49 | static LIST_HEAD(kernel_fb_helper_list); |
50 | |||
3192 | Serge | 51 | /** |
52 | * DOC: fbdev helpers |
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53 | * |
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54 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel |
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5060 | serge | 55 | * mode setting driver. They can be used mostly independently from the crtc |
3192 | Serge | 56 | * helper functions used by many drivers to implement the kernel mode setting |
57 | * interfaces. |
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3480 | Serge | 58 | * |
5060 | serge | 59 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
60 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and |
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61 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the |
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62 | * default behaviour can override the third step with their own code. |
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63 | * Teardown is done with drm_fb_helper_fini(). |
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3480 | Serge | 64 | * |
65 | * At runtime drivers should restore the fbdev console by calling |
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6084 | serge | 66 | * drm_fb_helper_restore_fbdev_mode_unlocked() from their ->lastclose callback. |
67 | * They should also notify the fb helper code from updates to the output |
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3480 | Serge | 68 | * configuration by calling drm_fb_helper_hotplug_event(). For easier |
69 | * integration with the output polling code in drm_crtc_helper.c the modeset |
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5060 | serge | 70 | * code provides a ->output_poll_changed callback. |
3480 | Serge | 71 | * |
72 | * All other functions exported by the fb helper library can be used to |
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73 | * implement the fbdev driver interface by the driver. |
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5060 | serge | 74 | * |
75 | * It is possible, though perhaps somewhat tricky, to implement race-free |
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76 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() |
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77 | * helper must be called first to initialize the minimum required to make |
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78 | * hotplug detection work. Drivers also need to make sure to properly set up |
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79 | * the dev->mode_config.funcs member. After calling drm_kms_helper_poll_init() |
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80 | * it is safe to enable interrupts and start processing hotplug events. At the |
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81 | * same time, drivers should initialize all modeset objects such as CRTCs, |
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82 | * encoders and connectors. To finish up the fbdev helper initialization, the |
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83 | * drm_fb_helper_init() function is called. To probe for all attached displays |
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84 | * and set up an initial configuration using the detected hardware, drivers |
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85 | * should call drm_fb_helper_single_add_all_connectors() followed by |
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86 | * drm_fb_helper_initial_config(). |
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3192 | Serge | 87 | */ |
88 | |||
3480 | Serge | 89 | /** |
90 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev |
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91 | * emulation helper |
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92 | * @fb_helper: fbdev initialized with drm_fb_helper_init |
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93 | * |
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94 | * This functions adds all the available connectors for use with the given |
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95 | * fb_helper. This is a separate step to allow drivers to freely assign |
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96 | * connectors to the fbdev, e.g. if some are reserved for special purposes or |
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97 | * not adequate to be used for the fbcon. |
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98 | * |
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6084 | serge | 99 | * This function is protected against concurrent connector hotadds/removals |
100 | * using drm_fb_helper_add_one_connector() and |
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101 | * drm_fb_helper_remove_one_connector(). |
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3480 | Serge | 102 | */ |
1963 | serge | 103 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
1221 | serge | 104 | { |
1963 | serge | 105 | struct drm_device *dev = fb_helper->dev; |
106 | struct drm_connector *connector; |
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7144 | serge | 107 | int i, ret; |
1221 | serge | 108 | |
6084 | serge | 109 | if (!drm_fbdev_emulation) |
110 | return 0; |
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111 | |||
112 | mutex_lock(&dev->mode_config.mutex); |
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113 | drm_for_each_connector(connector, dev) { |
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7144 | serge | 114 | ret = drm_fb_helper_add_one_connector(fb_helper, connector); |
1963 | serge | 115 | |
7144 | serge | 116 | if (ret) |
1963 | serge | 117 | goto fail; |
118 | } |
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6084 | serge | 119 | mutex_unlock(&dev->mode_config.mutex); |
1221 | serge | 120 | return 0; |
1963 | serge | 121 | fail: |
122 | for (i = 0; i < fb_helper->connector_count; i++) { |
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123 | kfree(fb_helper->connector_info[i]); |
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124 | fb_helper->connector_info[i] = NULL; |
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125 | } |
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126 | fb_helper->connector_count = 0; |
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6084 | serge | 127 | mutex_unlock(&dev->mode_config.mutex); |
128 | |||
7144 | serge | 129 | return ret; |
1221 | serge | 130 | } |
1963 | serge | 131 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
1221 | serge | 132 | |
5060 | serge | 133 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) |
134 | { |
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135 | struct drm_fb_helper_connector **temp; |
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136 | struct drm_fb_helper_connector *fb_helper_connector; |
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137 | |||
6084 | serge | 138 | if (!drm_fbdev_emulation) |
139 | return 0; |
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140 | |||
5060 | serge | 141 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
142 | if (fb_helper->connector_count + 1 > fb_helper->connector_info_alloc_count) { |
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5271 | serge | 143 | temp = krealloc(fb_helper->connector_info, sizeof(struct drm_fb_helper_connector *) * (fb_helper->connector_count + 1), GFP_KERNEL); |
5060 | serge | 144 | if (!temp) |
145 | return -ENOMEM; |
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146 | |||
147 | fb_helper->connector_info_alloc_count = fb_helper->connector_count + 1; |
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148 | fb_helper->connector_info = temp; |
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149 | } |
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150 | |||
151 | |||
152 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); |
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153 | if (!fb_helper_connector) |
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154 | return -ENOMEM; |
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155 | |||
156 | fb_helper_connector->connector = connector; |
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157 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; |
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158 | return 0; |
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159 | } |
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160 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); |
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161 | |||
6084 | serge | 162 | static void remove_from_modeset(struct drm_mode_set *set, |
163 | struct drm_connector *connector) |
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164 | { |
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165 | int i, j; |
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166 | |||
167 | for (i = 0; i < set->num_connectors; i++) { |
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168 | if (set->connectors[i] == connector) |
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169 | break; |
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170 | } |
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171 | |||
172 | if (i == set->num_connectors) |
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173 | return; |
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174 | |||
175 | for (j = i + 1; j < set->num_connectors; j++) { |
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176 | set->connectors[j - 1] = set->connectors[j]; |
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177 | } |
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178 | set->num_connectors--; |
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179 | |||
180 | /* |
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181 | * TODO maybe need to makes sure we set it back to !=NULL somewhere? |
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182 | */ |
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183 | if (set->num_connectors == 0) { |
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184 | set->fb = NULL; |
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185 | drm_mode_destroy(connector->dev, set->mode); |
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186 | set->mode = NULL; |
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187 | } |
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188 | } |
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189 | |||
5060 | serge | 190 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, |
191 | struct drm_connector *connector) |
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192 | { |
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193 | struct drm_fb_helper_connector *fb_helper_connector; |
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194 | int i, j; |
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195 | |||
6084 | serge | 196 | if (!drm_fbdev_emulation) |
197 | return 0; |
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198 | |||
5060 | serge | 199 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
200 | |||
201 | for (i = 0; i < fb_helper->connector_count; i++) { |
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202 | if (fb_helper->connector_info[i]->connector == connector) |
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203 | break; |
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204 | } |
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205 | |||
206 | if (i == fb_helper->connector_count) |
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207 | return -EINVAL; |
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208 | fb_helper_connector = fb_helper->connector_info[i]; |
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209 | |||
210 | for (j = i + 1; j < fb_helper->connector_count; j++) { |
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211 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; |
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212 | } |
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213 | fb_helper->connector_count--; |
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214 | kfree(fb_helper_connector); |
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6084 | serge | 215 | |
216 | /* also cleanup dangling references to the connector: */ |
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217 | for (i = 0; i < fb_helper->crtc_count; i++) |
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218 | remove_from_modeset(&fb_helper->crtc_info[i].mode_set, connector); |
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219 | |||
5060 | serge | 220 | return 0; |
221 | } |
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222 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); |
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5271 | serge | 223 | |
1963 | serge | 224 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
1179 | serge | 225 | { |
1963 | serge | 226 | uint16_t *r_base, *g_base, *b_base; |
227 | int i; |
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1179 | serge | 228 | |
4104 | Serge | 229 | if (helper->funcs->gamma_get == NULL) |
230 | return; |
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231 | |||
1963 | serge | 232 | r_base = crtc->gamma_store; |
233 | g_base = r_base + crtc->gamma_size; |
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234 | b_base = g_base + crtc->gamma_size; |
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1179 | serge | 235 | |
1963 | serge | 236 | for (i = 0; i < crtc->gamma_size; i++) |
237 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); |
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1179 | serge | 238 | } |
239 | |||
1963 | serge | 240 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) |
1179 | serge | 241 | { |
1963 | serge | 242 | uint16_t *r_base, *g_base, *b_base; |
243 | |||
3031 | serge | 244 | if (crtc->funcs->gamma_set == NULL) |
245 | return; |
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246 | |||
1963 | serge | 247 | r_base = crtc->gamma_store; |
248 | g_base = r_base + crtc->gamma_size; |
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249 | b_base = g_base + crtc->gamma_size; |
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250 | |||
251 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); |
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1179 | serge | 252 | } |
253 | |||
6084 | serge | 254 | /* Find the real fb for a given fb helper CRTC */ |
255 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) |
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256 | { |
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257 | struct drm_device *dev = crtc->dev; |
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258 | struct drm_crtc *c; |
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1179 | serge | 259 | |
6084 | serge | 260 | drm_for_each_crtc(c, dev) { |
261 | if (crtc->base.id == c->base.id) |
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262 | return c->primary->fb; |
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263 | } |
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264 | |||
265 | return NULL; |
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266 | } |
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267 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
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5060 | serge | 268 | { |
269 | struct drm_device *dev = fb_helper->dev; |
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270 | struct drm_plane *plane; |
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6084 | serge | 271 | struct drm_atomic_state *state; |
272 | int i, ret; |
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273 | unsigned plane_mask; |
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274 | |||
275 | state = drm_atomic_state_alloc(dev); |
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276 | if (!state) |
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277 | return -ENOMEM; |
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278 | |||
279 | state->acquire_ctx = dev->mode_config.acquire_ctx; |
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280 | retry: |
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281 | plane_mask = 0; |
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282 | drm_for_each_plane(plane, dev) { |
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283 | struct drm_plane_state *plane_state; |
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284 | |||
285 | plane_state = drm_atomic_get_plane_state(state, plane); |
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286 | if (IS_ERR(plane_state)) { |
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287 | ret = PTR_ERR(plane_state); |
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288 | goto fail; |
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289 | } |
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290 | |||
291 | plane_state->rotation = BIT(DRM_ROTATE_0); |
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292 | |||
293 | plane->old_fb = plane->fb; |
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294 | plane_mask |= 1 << drm_plane_index(plane); |
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295 | |||
296 | /* disable non-primary: */ |
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297 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) |
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298 | continue; |
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299 | |||
300 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
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301 | if (ret != 0) |
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302 | goto fail; |
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303 | } |
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304 | |||
305 | for(i = 0; i < fb_helper->crtc_count; i++) { |
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306 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; |
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307 | |||
308 | ret = __drm_atomic_helper_set_config(mode_set, state); |
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309 | if (ret != 0) |
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310 | goto fail; |
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311 | } |
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312 | |||
313 | ret = drm_atomic_commit(state); |
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314 | |||
315 | fail: |
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316 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
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317 | |||
318 | if (ret == -EDEADLK) |
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319 | goto backoff; |
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320 | |||
321 | if (ret != 0) |
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322 | drm_atomic_state_free(state); |
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323 | |||
324 | return ret; |
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325 | |||
326 | backoff: |
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327 | drm_atomic_state_clear(state); |
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328 | drm_atomic_legacy_backoff(state); |
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329 | |||
330 | goto retry; |
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331 | } |
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332 | |||
333 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
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334 | { |
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335 | struct drm_device *dev = fb_helper->dev; |
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336 | struct drm_plane *plane; |
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5060 | serge | 337 | int i; |
338 | |||
339 | drm_warn_on_modeset_not_all_locked(dev); |
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340 | |||
6084 | serge | 341 | if (fb_helper->atomic) |
342 | return restore_fbdev_mode_atomic(fb_helper); |
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343 | |||
344 | drm_for_each_plane(plane, dev) { |
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5060 | serge | 345 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
346 | drm_plane_force_disable(plane); |
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347 | |||
5271 | serge | 348 | if (dev->mode_config.rotation_property) { |
349 | drm_mode_plane_set_obj_prop(plane, |
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350 | dev->mode_config.rotation_property, |
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351 | BIT(DRM_ROTATE_0)); |
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352 | } |
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353 | } |
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354 | |||
5060 | serge | 355 | for (i = 0; i < fb_helper->crtc_count; i++) { |
356 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; |
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357 | struct drm_crtc *crtc = mode_set->crtc; |
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358 | int ret; |
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359 | |||
6084 | serge | 360 | if (crtc->funcs->cursor_set2) { |
361 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); |
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362 | if (ret) |
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363 | return ret; |
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364 | } else if (crtc->funcs->cursor_set) { |
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5060 | serge | 365 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
366 | if (ret) |
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6084 | serge | 367 | return ret; |
5060 | serge | 368 | } |
369 | |||
370 | ret = drm_mode_set_config_internal(mode_set); |
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371 | if (ret) |
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6084 | serge | 372 | return ret; |
5060 | serge | 373 | } |
6084 | serge | 374 | |
375 | return 0; |
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5060 | serge | 376 | } |
6084 | serge | 377 | |
5060 | serge | 378 | /** |
379 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration |
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380 | * @fb_helper: fbcon to restore |
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381 | * |
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382 | * This should be called from driver's drm ->lastclose callback |
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383 | * when implementing an fbcon on top of kms using this helper. This ensures that |
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384 | * the user isn't greeted with a black screen when e.g. X dies. |
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6084 | serge | 385 | * |
386 | * RETURNS: |
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387 | * Zero if everything went ok, negative error code otherwise. |
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5060 | serge | 388 | */ |
6084 | serge | 389 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5060 | serge | 390 | { |
391 | struct drm_device *dev = fb_helper->dev; |
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6084 | serge | 392 | bool do_delayed; |
393 | int ret; |
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5271 | serge | 394 | |
6084 | serge | 395 | if (!drm_fbdev_emulation) |
396 | return -ENODEV; |
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397 | |||
5060 | serge | 398 | drm_modeset_lock_all(dev); |
399 | ret = restore_fbdev_mode(fb_helper); |
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6084 | serge | 400 | |
401 | do_delayed = fb_helper->delayed_hotplug; |
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402 | if (do_delayed) |
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403 | fb_helper->delayed_hotplug = false; |
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5060 | serge | 404 | drm_modeset_unlock_all(dev); |
6084 | serge | 405 | |
406 | if (do_delayed) |
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407 | drm_fb_helper_hotplug_event(fb_helper); |
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5060 | serge | 408 | return ret; |
409 | } |
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410 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); |
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411 | |||
3480 | Serge | 412 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
413 | { |
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414 | struct drm_device *dev = fb_helper->dev; |
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415 | struct drm_crtc *crtc; |
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416 | int bound = 0, crtcs_bound = 0; |
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1179 | serge | 417 | |
6084 | serge | 418 | /* Sometimes user space wants everything disabled, so don't steal the |
419 | * display if there's a master. */ |
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6296 | serge | 420 | // if (dev->primary->master) |
421 | // return false; |
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6084 | serge | 422 | |
423 | drm_for_each_crtc(crtc, dev) { |
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5060 | serge | 424 | if (crtc->primary->fb) |
3480 | Serge | 425 | crtcs_bound++; |
5060 | serge | 426 | if (crtc->primary->fb == fb_helper->fb) |
3480 | Serge | 427 | bound++; |
428 | } |
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429 | |||
430 | if (bound < crtcs_bound) |
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431 | return false; |
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4560 | Serge | 432 | |
3480 | Serge | 433 | return true; |
434 | } |
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435 | |||
4560 | Serge | 436 | #ifdef CONFIG_MAGIC_SYSRQ |
437 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
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438 | { |
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439 | bool ret; |
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440 | ret = drm_fb_helper_force_kernel_mode(); |
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441 | if (ret == true) |
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442 | DRM_ERROR("Failed to restore crtc configuration\n"); |
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443 | } |
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444 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); |
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445 | |||
446 | static void drm_fb_helper_sysrq(int dummy1) |
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447 | { |
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448 | schedule_work(&drm_fb_helper_restore_work); |
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449 | } |
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450 | |||
451 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { |
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452 | .handler = drm_fb_helper_sysrq, |
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453 | .help_msg = "force-fb(V)", |
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454 | .action_msg = "Restore framebuffer console", |
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455 | }; |
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456 | #else |
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457 | |||
458 | #endif |
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459 | |||
3031 | serge | 460 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
1179 | serge | 461 | { |
462 | struct drm_fb_helper *fb_helper = info->par; |
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463 | struct drm_device *dev = fb_helper->dev; |
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464 | struct drm_crtc *crtc; |
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1963 | serge | 465 | struct drm_connector *connector; |
466 | int i, j; |
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1179 | serge | 467 | |
468 | /* |
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3031 | serge | 469 | * For each CRTC in this fb, turn the connectors on/off. |
1179 | serge | 470 | */ |
3480 | Serge | 471 | drm_modeset_lock_all(dev); |
472 | if (!drm_fb_helper_is_bound(fb_helper)) { |
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473 | drm_modeset_unlock_all(dev); |
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474 | return; |
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475 | } |
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476 | |||
1179 | serge | 477 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1963 | serge | 478 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
1179 | serge | 479 | |
1963 | serge | 480 | if (!crtc->enabled) |
6084 | serge | 481 | continue; |
1179 | serge | 482 | |
3031 | serge | 483 | /* Walk the connectors & encoders on this fb turning them on/off */ |
1963 | serge | 484 | for (j = 0; j < fb_helper->connector_count; j++) { |
485 | connector = fb_helper->connector_info[j]->connector; |
||
3031 | serge | 486 | connector->funcs->dpms(connector, dpms_mode); |
3192 | Serge | 487 | drm_object_property_set_value(&connector->base, |
3031 | serge | 488 | dev->mode_config.dpms_property, dpms_mode); |
1963 | serge | 489 | } |
490 | } |
||
3480 | Serge | 491 | drm_modeset_unlock_all(dev); |
1179 | serge | 492 | } |
493 | |||
3480 | Serge | 494 | /** |
495 | * drm_fb_helper_blank - implementation for ->fb_blank |
||
496 | * @blank: desired blanking state |
||
497 | * @info: fbdev registered by the helper |
||
498 | */ |
||
1179 | serge | 499 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
500 | { |
||
6084 | serge | 501 | if (oops_in_progress) |
502 | return -EBUSY; |
||
503 | |||
1179 | serge | 504 | switch (blank) { |
1321 | serge | 505 | /* Display: On; HSync: On, VSync: On */ |
1179 | serge | 506 | case FB_BLANK_UNBLANK: |
3031 | serge | 507 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
1179 | serge | 508 | break; |
1321 | serge | 509 | /* Display: Off; HSync: On, VSync: On */ |
1179 | serge | 510 | case FB_BLANK_NORMAL: |
3031 | serge | 511 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
1179 | serge | 512 | break; |
1321 | serge | 513 | /* Display: Off; HSync: Off, VSync: On */ |
1179 | serge | 514 | case FB_BLANK_HSYNC_SUSPEND: |
3031 | serge | 515 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
1179 | serge | 516 | break; |
1321 | serge | 517 | /* Display: Off; HSync: On, VSync: Off */ |
1179 | serge | 518 | case FB_BLANK_VSYNC_SUSPEND: |
3031 | serge | 519 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
1179 | serge | 520 | break; |
1321 | serge | 521 | /* Display: Off; HSync: Off, VSync: Off */ |
1179 | serge | 522 | case FB_BLANK_POWERDOWN: |
3031 | serge | 523 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
1179 | serge | 524 | break; |
525 | } |
||
526 | return 0; |
||
527 | } |
||
528 | EXPORT_SYMBOL(drm_fb_helper_blank); |
||
529 | |||
530 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) |
||
531 | { |
||
532 | int i; |
||
533 | |||
1963 | serge | 534 | for (i = 0; i < helper->connector_count; i++) |
535 | kfree(helper->connector_info[i]); |
||
536 | kfree(helper->connector_info); |
||
3031 | serge | 537 | for (i = 0; i < helper->crtc_count; i++) { |
1179 | serge | 538 | kfree(helper->crtc_info[i].mode_set.connectors); |
3031 | serge | 539 | if (helper->crtc_info[i].mode_set.mode) |
540 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); |
||
541 | } |
||
1179 | serge | 542 | kfree(helper->crtc_info); |
543 | } |
||
544 | |||
3480 | Serge | 545 | /** |
5060 | serge | 546 | * drm_fb_helper_prepare - setup a drm_fb_helper structure |
547 | * @dev: DRM device |
||
548 | * @helper: driver-allocated fbdev helper structure to set up |
||
549 | * @funcs: pointer to structure of functions associate with this helper |
||
550 | * |
||
551 | * Sets up the bare minimum to make the framebuffer helper usable. This is |
||
552 | * useful to implement race-free initialization of the polling helpers. |
||
553 | */ |
||
554 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, |
||
555 | const struct drm_fb_helper_funcs *funcs) |
||
556 | { |
||
557 | INIT_LIST_HEAD(&helper->kernel_fb_list); |
||
558 | helper->funcs = funcs; |
||
559 | helper->dev = dev; |
||
560 | } |
||
561 | EXPORT_SYMBOL(drm_fb_helper_prepare); |
||
562 | |||
563 | /** |
||
3480 | Serge | 564 | * drm_fb_helper_init - initialize a drm_fb_helper structure |
565 | * @dev: drm device |
||
566 | * @fb_helper: driver-allocated fbdev helper structure to initialize |
||
567 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation |
||
568 | * @max_conn_count: max connector count |
||
569 | * |
||
570 | * This allocates the structures for the fbdev helper with the given limits. |
||
571 | * Note that this won't yet touch the hardware (through the driver interfaces) |
||
572 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() |
||
573 | * to allow driver writes more control over the exact init sequence. |
||
574 | * |
||
5060 | serge | 575 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
3480 | Serge | 576 | * |
577 | * RETURNS: |
||
578 | * Zero if everything went ok, nonzero otherwise. |
||
579 | */ |
||
1963 | serge | 580 | int drm_fb_helper_init(struct drm_device *dev, |
581 | struct drm_fb_helper *fb_helper, |
||
582 | int crtc_count, int max_conn_count) |
||
1179 | serge | 583 | { |
584 | struct drm_crtc *crtc; |
||
585 | int i; |
||
586 | |||
6084 | serge | 587 | if (!drm_fbdev_emulation) |
588 | return 0; |
||
589 | |||
5060 | serge | 590 | if (!max_conn_count) |
591 | return -EINVAL; |
||
1963 | serge | 592 | |
593 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
||
594 | if (!fb_helper->crtc_info) |
||
1179 | serge | 595 | return -ENOMEM; |
596 | |||
1963 | serge | 597 | fb_helper->crtc_count = crtc_count; |
598 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); |
||
599 | if (!fb_helper->connector_info) { |
||
600 | kfree(fb_helper->crtc_info); |
||
601 | return -ENOMEM; |
||
602 | } |
||
5060 | serge | 603 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
1963 | serge | 604 | fb_helper->connector_count = 0; |
1179 | serge | 605 | |
606 | for (i = 0; i < crtc_count; i++) { |
||
1963 | serge | 607 | fb_helper->crtc_info[i].mode_set.connectors = |
1179 | serge | 608 | kcalloc(max_conn_count, |
609 | sizeof(struct drm_connector *), |
||
610 | GFP_KERNEL); |
||
611 | |||
3031 | serge | 612 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
1179 | serge | 613 | goto out_free; |
1963 | serge | 614 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
1179 | serge | 615 | } |
616 | |||
617 | i = 0; |
||
6084 | serge | 618 | drm_for_each_crtc(crtc, dev) { |
1963 | serge | 619 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
1179 | serge | 620 | i++; |
621 | } |
||
3031 | serge | 622 | |
6084 | serge | 623 | fb_helper->atomic = !!drm_core_check_feature(dev, DRIVER_ATOMIC); |
624 | |||
1179 | serge | 625 | return 0; |
626 | out_free: |
||
1963 | serge | 627 | drm_fb_helper_crtc_free(fb_helper); |
1179 | serge | 628 | return -ENOMEM; |
629 | } |
||
1963 | serge | 630 | EXPORT_SYMBOL(drm_fb_helper_init); |
1179 | serge | 631 | |
6084 | serge | 632 | /** |
633 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members |
||
634 | * @fb_helper: driver-allocated fbdev helper |
||
635 | * |
||
636 | * A helper to alloc fb_info and the members cmap and apertures. Called |
||
637 | * by the driver within the fb_probe fb_helper callback function. |
||
638 | * |
||
639 | * RETURNS: |
||
640 | * fb_info pointer if things went okay, pointer containing error code |
||
641 | * otherwise |
||
642 | */ |
||
643 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) |
||
644 | { |
||
645 | struct device *dev = fb_helper->dev->dev; |
||
646 | struct fb_info *info; |
||
647 | int ret; |
||
648 | |||
649 | info = framebuffer_alloc(0, dev); |
||
650 | if (!info) |
||
651 | return ERR_PTR(-ENOMEM); |
||
652 | |||
653 | |||
654 | fb_helper->fbdev = info; |
||
655 | |||
656 | return info; |
||
657 | |||
658 | } |
||
659 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); |
||
1246 | serge | 660 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
1221 | serge | 661 | u16 blue, u16 regno, struct fb_info *info) |
662 | { |
||
663 | struct drm_fb_helper *fb_helper = info->par; |
||
664 | struct drm_framebuffer *fb = fb_helper->fb; |
||
665 | int pindex; |
||
666 | |||
1246 | serge | 667 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
668 | u32 *palette; |
||
669 | u32 value; |
||
670 | /* place color in psuedopalette */ |
||
671 | if (regno > 16) |
||
672 | return -EINVAL; |
||
673 | palette = (u32 *)info->pseudo_palette; |
||
674 | red >>= (16 - info->var.red.length); |
||
675 | green >>= (16 - info->var.green.length); |
||
676 | blue >>= (16 - info->var.blue.length); |
||
677 | value = (red << info->var.red.offset) | |
||
678 | (green << info->var.green.offset) | |
||
679 | (blue << info->var.blue.offset); |
||
1963 | serge | 680 | if (info->var.transp.length > 0) { |
681 | u32 mask = (1 << info->var.transp.length) - 1; |
||
682 | mask <<= info->var.transp.offset; |
||
683 | value |= mask; |
||
684 | } |
||
1246 | serge | 685 | palette[regno] = value; |
686 | return 0; |
||
687 | } |
||
688 | |||
4104 | Serge | 689 | /* |
690 | * The driver really shouldn't advertise pseudo/directcolor |
||
691 | * visuals if it can't deal with the palette. |
||
692 | */ |
||
693 | if (WARN_ON(!fb_helper->funcs->gamma_set || |
||
694 | !fb_helper->funcs->gamma_get)) |
||
695 | return -EINVAL; |
||
696 | |||
1221 | serge | 697 | pindex = regno; |
698 | |||
699 | if (fb->bits_per_pixel == 16) { |
||
700 | pindex = regno << 3; |
||
701 | |||
702 | if (fb->depth == 16 && regno > 63) |
||
1246 | serge | 703 | return -EINVAL; |
1221 | serge | 704 | if (fb->depth == 15 && regno > 31) |
1246 | serge | 705 | return -EINVAL; |
1221 | serge | 706 | |
707 | if (fb->depth == 16) { |
||
708 | u16 r, g, b; |
||
709 | int i; |
||
710 | if (regno < 32) { |
||
711 | for (i = 0; i < 8; i++) |
||
712 | fb_helper->funcs->gamma_set(crtc, red, |
||
713 | green, blue, pindex + i); |
||
714 | } |
||
715 | |||
716 | fb_helper->funcs->gamma_get(crtc, &r, |
||
717 | &g, &b, |
||
718 | pindex >> 1); |
||
719 | |||
720 | for (i = 0; i < 4; i++) |
||
721 | fb_helper->funcs->gamma_set(crtc, r, |
||
722 | green, b, |
||
723 | (pindex >> 1) + i); |
||
724 | } |
||
725 | } |
||
726 | |||
727 | if (fb->depth != 16) |
||
728 | fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); |
||
1246 | serge | 729 | return 0; |
1221 | serge | 730 | } |
731 | |||
3480 | Serge | 732 | /** |
733 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap |
||
734 | * @cmap: cmap to set |
||
735 | * @info: fbdev registered by the helper |
||
736 | */ |
||
1221 | serge | 737 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
738 | { |
||
739 | struct drm_fb_helper *fb_helper = info->par; |
||
4104 | Serge | 740 | struct drm_device *dev = fb_helper->dev; |
6084 | serge | 741 | const struct drm_crtc_helper_funcs *crtc_funcs; |
1221 | serge | 742 | u16 *red, *green, *blue, *transp; |
743 | struct drm_crtc *crtc; |
||
1963 | serge | 744 | int i, j, rc = 0; |
1221 | serge | 745 | int start; |
746 | |||
6084 | serge | 747 | if (oops_in_progress) |
748 | return -EBUSY; |
||
749 | |||
4104 | Serge | 750 | drm_modeset_lock_all(dev); |
751 | if (!drm_fb_helper_is_bound(fb_helper)) { |
||
752 | drm_modeset_unlock_all(dev); |
||
753 | return -EBUSY; |
||
754 | } |
||
755 | |||
6084 | serge | 756 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1963 | serge | 757 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
758 | crtc_funcs = crtc->helper_private; |
||
1221 | serge | 759 | |
760 | red = cmap->red; |
||
761 | green = cmap->green; |
||
762 | blue = cmap->blue; |
||
763 | transp = cmap->transp; |
||
764 | start = cmap->start; |
||
765 | |||
1963 | serge | 766 | for (j = 0; j < cmap->len; j++) { |
1221 | serge | 767 | u16 hred, hgreen, hblue, htransp = 0xffff; |
768 | |||
769 | hred = *red++; |
||
770 | hgreen = *green++; |
||
771 | hblue = *blue++; |
||
772 | |||
773 | if (transp) |
||
774 | htransp = *transp++; |
||
775 | |||
1246 | serge | 776 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
777 | if (rc) |
||
4104 | Serge | 778 | goto out; |
1221 | serge | 779 | } |
4104 | Serge | 780 | if (crtc_funcs->load_lut) |
6084 | serge | 781 | crtc_funcs->load_lut(crtc); |
1221 | serge | 782 | } |
4104 | Serge | 783 | out: |
784 | drm_modeset_unlock_all(dev); |
||
1221 | serge | 785 | return rc; |
786 | } |
||
787 | EXPORT_SYMBOL(drm_fb_helper_setcmap); |
||
788 | |||
3480 | Serge | 789 | /** |
790 | * drm_fb_helper_check_var - implementation for ->fb_check_var |
||
791 | * @var: screeninfo to check |
||
792 | * @info: fbdev registered by the helper |
||
793 | */ |
||
1179 | serge | 794 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
795 | struct fb_info *info) |
||
796 | { |
||
797 | struct drm_fb_helper *fb_helper = info->par; |
||
798 | struct drm_framebuffer *fb = fb_helper->fb; |
||
799 | int depth; |
||
800 | |||
1963 | serge | 801 | if (var->pixclock != 0 || in_dbg_master()) |
1179 | serge | 802 | return -EINVAL; |
803 | |||
804 | /* Need to resize the fb object !!! */ |
||
3031 | serge | 805 | if (var->bits_per_pixel > fb->bits_per_pixel || |
806 | var->xres > fb->width || var->yres > fb->height || |
||
807 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { |
||
1404 | serge | 808 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
3031 | serge | 809 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
810 | var->xres, var->yres, var->bits_per_pixel, |
||
811 | var->xres_virtual, var->yres_virtual, |
||
1404 | serge | 812 | fb->width, fb->height, fb->bits_per_pixel); |
1179 | serge | 813 | return -EINVAL; |
814 | } |
||
815 | |||
816 | switch (var->bits_per_pixel) { |
||
817 | case 16: |
||
818 | depth = (var->green.length == 6) ? 16 : 15; |
||
819 | break; |
||
820 | case 32: |
||
821 | depth = (var->transp.length > 0) ? 32 : 24; |
||
822 | break; |
||
823 | default: |
||
824 | depth = var->bits_per_pixel; |
||
825 | break; |
||
826 | } |
||
827 | |||
828 | switch (depth) { |
||
829 | case 8: |
||
830 | var->red.offset = 0; |
||
831 | var->green.offset = 0; |
||
832 | var->blue.offset = 0; |
||
833 | var->red.length = 8; |
||
834 | var->green.length = 8; |
||
835 | var->blue.length = 8; |
||
836 | var->transp.length = 0; |
||
837 | var->transp.offset = 0; |
||
838 | break; |
||
839 | case 15: |
||
840 | var->red.offset = 10; |
||
841 | var->green.offset = 5; |
||
842 | var->blue.offset = 0; |
||
843 | var->red.length = 5; |
||
844 | var->green.length = 5; |
||
845 | var->blue.length = 5; |
||
846 | var->transp.length = 1; |
||
847 | var->transp.offset = 15; |
||
848 | break; |
||
849 | case 16: |
||
850 | var->red.offset = 11; |
||
851 | var->green.offset = 5; |
||
852 | var->blue.offset = 0; |
||
853 | var->red.length = 5; |
||
854 | var->green.length = 6; |
||
855 | var->blue.length = 5; |
||
856 | var->transp.length = 0; |
||
857 | var->transp.offset = 0; |
||
858 | break; |
||
859 | case 24: |
||
860 | var->red.offset = 16; |
||
861 | var->green.offset = 8; |
||
862 | var->blue.offset = 0; |
||
863 | var->red.length = 8; |
||
864 | var->green.length = 8; |
||
865 | var->blue.length = 8; |
||
866 | var->transp.length = 0; |
||
867 | var->transp.offset = 0; |
||
868 | break; |
||
869 | case 32: |
||
870 | var->red.offset = 16; |
||
871 | var->green.offset = 8; |
||
872 | var->blue.offset = 0; |
||
873 | var->red.length = 8; |
||
874 | var->green.length = 8; |
||
875 | var->blue.length = 8; |
||
876 | var->transp.length = 8; |
||
877 | var->transp.offset = 24; |
||
878 | break; |
||
879 | default: |
||
880 | return -EINVAL; |
||
881 | } |
||
882 | return 0; |
||
883 | } |
||
884 | EXPORT_SYMBOL(drm_fb_helper_check_var); |
||
885 | |||
3480 | Serge | 886 | /** |
887 | * drm_fb_helper_set_par - implementation for ->fb_set_par |
||
888 | * @info: fbdev registered by the helper |
||
889 | * |
||
890 | * This will let fbcon do the mode init and is called at initialization time by |
||
891 | * the fbdev core when registering the driver, and later on through the hotplug |
||
892 | * callback. |
||
893 | */ |
||
1179 | serge | 894 | int drm_fb_helper_set_par(struct fb_info *info) |
895 | { |
||
896 | struct drm_fb_helper *fb_helper = info->par; |
||
897 | struct fb_var_screeninfo *var = &info->var; |
||
898 | |||
6084 | serge | 899 | if (oops_in_progress) |
900 | return -EBUSY; |
||
901 | |||
1313 | serge | 902 | if (var->pixclock != 0) { |
1430 | serge | 903 | DRM_ERROR("PIXEL CLOCK SET\n"); |
1179 | serge | 904 | return -EINVAL; |
905 | } |
||
906 | |||
5060 | serge | 907 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
1963 | serge | 908 | |
1179 | serge | 909 | return 0; |
910 | } |
||
911 | EXPORT_SYMBOL(drm_fb_helper_set_par); |
||
912 | |||
6084 | serge | 913 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
914 | struct fb_info *info) |
||
915 | { |
||
916 | struct drm_fb_helper *fb_helper = info->par; |
||
917 | struct drm_device *dev = fb_helper->dev; |
||
918 | struct drm_atomic_state *state; |
||
919 | struct drm_plane *plane; |
||
920 | int i, ret; |
||
921 | unsigned plane_mask; |
||
922 | |||
923 | state = drm_atomic_state_alloc(dev); |
||
924 | if (!state) |
||
925 | return -ENOMEM; |
||
926 | |||
927 | state->acquire_ctx = dev->mode_config.acquire_ctx; |
||
928 | retry: |
||
929 | plane_mask = 0; |
||
930 | for(i = 0; i < fb_helper->crtc_count; i++) { |
||
931 | struct drm_mode_set *mode_set; |
||
932 | |||
933 | mode_set = &fb_helper->crtc_info[i].mode_set; |
||
934 | |||
935 | mode_set->x = var->xoffset; |
||
936 | mode_set->y = var->yoffset; |
||
937 | |||
938 | ret = __drm_atomic_helper_set_config(mode_set, state); |
||
939 | if (ret != 0) |
||
940 | goto fail; |
||
941 | |||
942 | plane = mode_set->crtc->primary; |
||
6937 | serge | 943 | plane_mask |= (1 << drm_plane_index(plane)); |
6084 | serge | 944 | plane->old_fb = plane->fb; |
945 | } |
||
946 | |||
947 | ret = drm_atomic_commit(state); |
||
948 | if (ret != 0) |
||
949 | goto fail; |
||
950 | |||
951 | info->var.xoffset = var->xoffset; |
||
952 | info->var.yoffset = var->yoffset; |
||
953 | |||
954 | |||
955 | fail: |
||
956 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
||
957 | |||
958 | if (ret == -EDEADLK) |
||
959 | goto backoff; |
||
960 | |||
961 | if (ret != 0) |
||
962 | drm_atomic_state_free(state); |
||
963 | |||
964 | return ret; |
||
965 | |||
966 | backoff: |
||
967 | drm_atomic_state_clear(state); |
||
968 | drm_atomic_legacy_backoff(state); |
||
969 | |||
970 | goto retry; |
||
971 | } |
||
972 | |||
3480 | Serge | 973 | /** |
974 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display |
||
975 | * @var: updated screen information |
||
976 | * @info: fbdev registered by the helper |
||
977 | */ |
||
1179 | serge | 978 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
979 | struct fb_info *info) |
||
980 | { |
||
981 | struct drm_fb_helper *fb_helper = info->par; |
||
982 | struct drm_device *dev = fb_helper->dev; |
||
983 | struct drm_mode_set *modeset; |
||
984 | int ret = 0; |
||
985 | int i; |
||
986 | |||
6084 | serge | 987 | if (oops_in_progress) |
988 | return -EBUSY; |
||
989 | |||
3480 | Serge | 990 | drm_modeset_lock_all(dev); |
991 | if (!drm_fb_helper_is_bound(fb_helper)) { |
||
992 | drm_modeset_unlock_all(dev); |
||
993 | return -EBUSY; |
||
994 | } |
||
995 | |||
6084 | serge | 996 | if (fb_helper->atomic) { |
997 | ret = pan_display_atomic(var, info); |
||
998 | goto unlock; |
||
999 | } |
||
1000 | |||
1001 | for (i = 0; i < fb_helper->crtc_count; i++) { |
||
1179 | serge | 1002 | modeset = &fb_helper->crtc_info[i].mode_set; |
1003 | |||
1004 | modeset->x = var->xoffset; |
||
1005 | modeset->y = var->yoffset; |
||
1006 | |||
1007 | if (modeset->num_connectors) { |
||
3480 | Serge | 1008 | ret = drm_mode_set_config_internal(modeset); |
1179 | serge | 1009 | if (!ret) { |
1010 | info->var.xoffset = var->xoffset; |
||
1011 | info->var.yoffset = var->yoffset; |
||
1012 | } |
||
1013 | } |
||
1014 | } |
||
6084 | serge | 1015 | unlock: |
3480 | Serge | 1016 | drm_modeset_unlock_all(dev); |
1179 | serge | 1017 | return ret; |
1018 | } |
||
1019 | EXPORT_SYMBOL(drm_fb_helper_pan_display); |
||
1020 | |||
3480 | Serge | 1021 | /* |
1022 | * Allocates the backing storage and sets up the fbdev info structure through |
||
1023 | * the ->fb_probe callback and then registers the fbdev and sets up the panic |
||
1024 | * notifier. |
||
1025 | */ |
||
1026 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
||
6084 | serge | 1027 | int preferred_bpp) |
1179 | serge | 1028 | { |
3480 | Serge | 1029 | int ret = 0; |
1179 | serge | 1030 | int crtc_count = 0; |
1963 | serge | 1031 | int i; |
1179 | serge | 1032 | struct fb_info *info; |
1963 | serge | 1033 | struct drm_fb_helper_surface_size sizes; |
1034 | int gamma_size = 0; |
||
1179 | serge | 1035 | |
1963 | serge | 1036 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); |
1037 | sizes.surface_depth = 24; |
||
1038 | sizes.surface_bpp = 32; |
||
1039 | sizes.fb_width = (unsigned)-1; |
||
1040 | sizes.fb_height = (unsigned)-1; |
||
1221 | serge | 1041 | |
3031 | serge | 1042 | /* if driver picks 8 or 16 by default use that |
1043 | for both depth/bpp */ |
||
3192 | Serge | 1044 | if (preferred_bpp != sizes.surface_bpp) |
3031 | serge | 1045 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
3192 | Serge | 1046 | |
3031 | serge | 1047 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
1048 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1049 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; |
||
1050 | struct drm_cmdline_mode *cmdline_mode; |
||
1051 | |||
5271 | serge | 1052 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
3031 | serge | 1053 | |
1054 | if (cmdline_mode->bpp_specified) { |
||
1055 | switch (cmdline_mode->bpp) { |
||
1056 | case 8: |
||
1057 | sizes.surface_depth = sizes.surface_bpp = 8; |
||
1058 | break; |
||
1059 | case 15: |
||
1060 | sizes.surface_depth = 15; |
||
1061 | sizes.surface_bpp = 16; |
||
1062 | break; |
||
1063 | case 16: |
||
1064 | sizes.surface_depth = sizes.surface_bpp = 16; |
||
1065 | break; |
||
1066 | case 24: |
||
1067 | sizes.surface_depth = sizes.surface_bpp = 24; |
||
1068 | break; |
||
1069 | case 32: |
||
6084 | serge | 1070 | sizes.surface_depth = 24; |
1071 | sizes.surface_bpp = 32; |
||
3031 | serge | 1072 | break; |
1073 | } |
||
1074 | break; |
||
1075 | } |
||
1076 | } |
||
1221 | serge | 1077 | |
1963 | serge | 1078 | crtc_count = 0; |
1079 | for (i = 0; i < fb_helper->crtc_count; i++) { |
||
1080 | struct drm_display_mode *desired_mode; |
||
6084 | serge | 1081 | struct drm_mode_set *mode_set; |
1082 | int x, y, j; |
||
1083 | /* in case of tile group, are we the last tile vert or horiz? |
||
1084 | * If no tile group you are always the last one both vertically |
||
1085 | * and horizontally |
||
1086 | */ |
||
1087 | bool lastv = true, lasth = true; |
||
1088 | |||
1963 | serge | 1089 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
6084 | serge | 1090 | mode_set = &fb_helper->crtc_info[i].mode_set; |
1091 | |||
1092 | if (!desired_mode) |
||
1093 | continue; |
||
1094 | |||
1095 | crtc_count++; |
||
1096 | |||
5271 | serge | 1097 | x = fb_helper->crtc_info[i].x; |
1098 | y = fb_helper->crtc_info[i].y; |
||
6084 | serge | 1099 | |
1100 | if (gamma_size == 0) |
||
1101 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; |
||
1102 | |||
1103 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); |
||
1104 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); |
||
1105 | |||
1106 | for (j = 0; j < mode_set->num_connectors; j++) { |
||
1107 | struct drm_connector *connector = mode_set->connectors[j]; |
||
1108 | if (connector->has_tile) { |
||
1109 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); |
||
1110 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); |
||
1111 | /* cloning to multiple tiles is just crazy-talk, so: */ |
||
1112 | break; |
||
1113 | } |
||
1114 | } |
||
1115 | |||
1116 | if (lasth) |
||
1117 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); |
||
1118 | if (lastv) |
||
1119 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); |
||
1179 | serge | 1120 | } |
1121 | |||
1963 | serge | 1122 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
1179 | serge | 1123 | /* hmm everyone went away - assume VGA cable just fell out |
1124 | and will come back later. */ |
||
1963 | serge | 1125 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
1126 | sizes.fb_width = sizes.surface_width = 1024; |
||
1127 | sizes.fb_height = sizes.surface_height = 768; |
||
1179 | serge | 1128 | } |
1129 | |||
1963 | serge | 1130 | /* push down into drivers */ |
3480 | Serge | 1131 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1132 | if (ret < 0) |
||
1133 | return ret; |
||
1179 | serge | 1134 | |
1963 | serge | 1135 | info = fb_helper->fbdev; |
1179 | serge | 1136 | |
3480 | Serge | 1137 | /* |
1138 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug |
||
1139 | * events, but at init time drm_setup_crtcs needs to be called before |
||
1140 | * the fb is allocated (since we need to figure out the desired size of |
||
1141 | * the fb before we can allocate it ...). Hence we need to fix things up |
||
1142 | * here again. |
||
1143 | */ |
||
3192 | Serge | 1144 | for (i = 0; i < fb_helper->crtc_count; i++) |
3480 | Serge | 1145 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
6084 | serge | 1146 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; |
1179 | serge | 1147 | |
3480 | Serge | 1148 | |
6084 | serge | 1149 | info->var.pixclock = 0; |
1150 | |||
5271 | serge | 1151 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1152 | info->node, info->fix.id); |
||
1963 | serge | 1153 | |
1154 | |||
6084 | serge | 1155 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); |
1156 | |||
1179 | serge | 1157 | return 0; |
1158 | } |
||
1159 | |||
3480 | Serge | 1160 | /** |
1161 | * drm_fb_helper_fill_fix - initializes fixed fbdev information |
||
1162 | * @info: fbdev registered by the helper |
||
1163 | * @pitch: desired pitch |
||
1164 | * @depth: desired depth |
||
1165 | * |
||
1166 | * Helper to fill in the fixed fbdev information useful for a non-accelerated |
||
1167 | * fbdev emulations. Drivers which support acceleration methods which impose |
||
1168 | * additional constraints need to set up their own limits. |
||
1169 | * |
||
1170 | * Drivers should call this (or their equivalent setup code) from their |
||
1171 | * ->fb_probe callback. |
||
1172 | */ |
||
1221 | serge | 1173 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1174 | uint32_t depth) |
||
1179 | serge | 1175 | { |
1176 | info->fix.type = FB_TYPE_PACKED_PIXELS; |
||
1221 | serge | 1177 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : |
1246 | serge | 1178 | FB_VISUAL_TRUECOLOR; |
1963 | serge | 1179 | info->fix.mmio_start = 0; |
1180 | info->fix.mmio_len = 0; |
||
1179 | serge | 1181 | info->fix.type_aux = 0; |
1182 | info->fix.xpanstep = 1; /* doing it in hw */ |
||
1183 | info->fix.ypanstep = 1; /* doing it in hw */ |
||
1184 | info->fix.ywrapstep = 0; |
||
1185 | info->fix.accel = FB_ACCEL_NONE; |
||
1186 | |||
1187 | info->fix.line_length = pitch; |
||
1188 | return; |
||
1189 | } |
||
1190 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); |
||
1191 | |||
3480 | Serge | 1192 | /** |
1193 | * drm_fb_helper_fill_var - initalizes variable fbdev information |
||
1194 | * @info: fbdev instance to set up |
||
1195 | * @fb_helper: fb helper instance to use as template |
||
1196 | * @fb_width: desired fb width |
||
1197 | * @fb_height: desired fb height |
||
1198 | * |
||
1199 | * Sets up the variable fbdev metainformation from the given fb helper instance |
||
1200 | * and the drm framebuffer allocated in fb_helper->fb. |
||
1201 | * |
||
1202 | * Drivers should call this (or their equivalent setup code) from their |
||
1203 | * ->fb_probe callback after having allocated the fbdev backing |
||
1204 | * storage framebuffer. |
||
1205 | */ |
||
1963 | serge | 1206 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
1179 | serge | 1207 | uint32_t fb_width, uint32_t fb_height) |
1208 | { |
||
1963 | serge | 1209 | struct drm_framebuffer *fb = fb_helper->fb; |
1210 | info->pseudo_palette = fb_helper->pseudo_palette; |
||
1179 | serge | 1211 | info->var.xres_virtual = fb->width; |
1212 | info->var.yres_virtual = fb->height; |
||
1213 | info->var.bits_per_pixel = fb->bits_per_pixel; |
||
1963 | serge | 1214 | info->var.accel_flags = FB_ACCELF_TEXT; |
1179 | serge | 1215 | info->var.xoffset = 0; |
1216 | info->var.yoffset = 0; |
||
1217 | info->var.activate = FB_ACTIVATE_NOW; |
||
1218 | info->var.height = -1; |
||
1219 | info->var.width = -1; |
||
1220 | |||
1221 | switch (fb->depth) { |
||
1222 | case 8: |
||
1223 | info->var.red.offset = 0; |
||
1224 | info->var.green.offset = 0; |
||
1225 | info->var.blue.offset = 0; |
||
1226 | info->var.red.length = 8; /* 8bit DAC */ |
||
1227 | info->var.green.length = 8; |
||
1228 | info->var.blue.length = 8; |
||
1229 | info->var.transp.offset = 0; |
||
1230 | info->var.transp.length = 0; |
||
1231 | break; |
||
1232 | case 15: |
||
1233 | info->var.red.offset = 10; |
||
1234 | info->var.green.offset = 5; |
||
1235 | info->var.blue.offset = 0; |
||
1236 | info->var.red.length = 5; |
||
1237 | info->var.green.length = 5; |
||
1238 | info->var.blue.length = 5; |
||
1239 | info->var.transp.offset = 15; |
||
1240 | info->var.transp.length = 1; |
||
1241 | break; |
||
1242 | case 16: |
||
1243 | info->var.red.offset = 11; |
||
1244 | info->var.green.offset = 5; |
||
1245 | info->var.blue.offset = 0; |
||
1246 | info->var.red.length = 5; |
||
1247 | info->var.green.length = 6; |
||
1248 | info->var.blue.length = 5; |
||
1249 | info->var.transp.offset = 0; |
||
1250 | break; |
||
1251 | case 24: |
||
1252 | info->var.red.offset = 16; |
||
1253 | info->var.green.offset = 8; |
||
1254 | info->var.blue.offset = 0; |
||
1255 | info->var.red.length = 8; |
||
1256 | info->var.green.length = 8; |
||
1257 | info->var.blue.length = 8; |
||
1258 | info->var.transp.offset = 0; |
||
1259 | info->var.transp.length = 0; |
||
1260 | break; |
||
1261 | case 32: |
||
1262 | info->var.red.offset = 16; |
||
1263 | info->var.green.offset = 8; |
||
1264 | info->var.blue.offset = 0; |
||
1265 | info->var.red.length = 8; |
||
1266 | info->var.green.length = 8; |
||
1267 | info->var.blue.length = 8; |
||
1268 | info->var.transp.offset = 24; |
||
1269 | info->var.transp.length = 8; |
||
1270 | break; |
||
1271 | default: |
||
1272 | break; |
||
1273 | } |
||
1274 | |||
1275 | info->var.xres = fb_width; |
||
1276 | info->var.yres = fb_height; |
||
1277 | } |
||
1278 | EXPORT_SYMBOL(drm_fb_helper_fill_var); |
||
1963 | serge | 1279 | |
1280 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
||
1281 | uint32_t maxX, |
||
1282 | uint32_t maxY) |
||
1283 | { |
||
1284 | struct drm_connector *connector; |
||
1285 | int count = 0; |
||
1286 | int i; |
||
1287 | |||
1288 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1289 | connector = fb_helper->connector_info[i]->connector; |
||
1290 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
||
1291 | } |
||
1292 | |||
1293 | return count; |
||
1294 | } |
||
1295 | |||
5060 | serge | 1296 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
1963 | serge | 1297 | { |
1298 | struct drm_display_mode *mode; |
||
1299 | |||
1300 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
||
5060 | serge | 1301 | if (mode->hdisplay > width || |
1302 | mode->vdisplay > height) |
||
1963 | serge | 1303 | continue; |
1304 | if (mode->type & DRM_MODE_TYPE_PREFERRED) |
||
1305 | return mode; |
||
1306 | } |
||
1307 | return NULL; |
||
1308 | } |
||
5060 | serge | 1309 | EXPORT_SYMBOL(drm_has_preferred_mode); |
1963 | serge | 1310 | |
1311 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
||
1312 | { |
||
5271 | serge | 1313 | return fb_connector->connector->cmdline_mode.specified; |
1963 | serge | 1314 | } |
1315 | |||
5060 | serge | 1316 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
3746 | Serge | 1317 | int width, int height) |
1318 | { |
||
1319 | struct drm_cmdline_mode *cmdline_mode; |
||
6084 | serge | 1320 | struct drm_display_mode *mode; |
5060 | serge | 1321 | bool prefer_non_interlace; |
1963 | serge | 1322 | |
6084 | serge | 1323 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
3746 | Serge | 1324 | if (cmdline_mode->specified == false) |
6088 | serge | 1325 | return NULL; |
3746 | Serge | 1326 | |
1327 | /* attempt to find a matching mode in the list of modes |
||
1328 | * we have gotten so far, if not add a CVT mode that conforms |
||
1329 | */ |
||
1330 | if (cmdline_mode->rb || cmdline_mode->margins) |
||
1331 | goto create_mode; |
||
1332 | |||
5060 | serge | 1333 | prefer_non_interlace = !cmdline_mode->interlace; |
6084 | serge | 1334 | again: |
3746 | Serge | 1335 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
1336 | /* check width/height */ |
||
1337 | if (mode->hdisplay != cmdline_mode->xres || |
||
1338 | mode->vdisplay != cmdline_mode->yres) |
||
1339 | continue; |
||
1340 | |||
1341 | if (cmdline_mode->refresh_specified) { |
||
1342 | if (mode->vrefresh != cmdline_mode->refresh) |
||
1343 | continue; |
||
1344 | } |
||
1345 | |||
1346 | if (cmdline_mode->interlace) { |
||
1347 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) |
||
1348 | continue; |
||
5060 | serge | 1349 | } else if (prefer_non_interlace) { |
1350 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
||
1351 | continue; |
||
3746 | Serge | 1352 | } |
1353 | return mode; |
||
1354 | } |
||
1355 | |||
5060 | serge | 1356 | if (prefer_non_interlace) { |
1357 | prefer_non_interlace = false; |
||
1358 | goto again; |
||
1359 | } |
||
1360 | |||
3746 | Serge | 1361 | create_mode: |
1362 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
||
1363 | cmdline_mode); |
||
1364 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
||
1365 | return mode; |
||
1366 | } |
||
5060 | serge | 1367 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
3746 | Serge | 1368 | |
1963 | serge | 1369 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) |
1370 | { |
||
1371 | bool enable; |
||
1372 | |||
3192 | Serge | 1373 | if (strict) |
1963 | serge | 1374 | enable = connector->status == connector_status_connected; |
3192 | Serge | 1375 | else |
1963 | serge | 1376 | enable = connector->status != connector_status_disconnected; |
3192 | Serge | 1377 | |
1963 | serge | 1378 | return enable; |
1379 | } |
||
1380 | |||
1381 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
||
1382 | bool *enabled) |
||
1383 | { |
||
1384 | bool any_enabled = false; |
||
1385 | struct drm_connector *connector; |
||
1386 | int i = 0; |
||
1387 | |||
1388 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1389 | connector = fb_helper->connector_info[i]->connector; |
||
1390 | enabled[i] = drm_connector_enabled(connector, true); |
||
1391 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, |
||
1392 | enabled[i] ? "yes" : "no"); |
||
1393 | any_enabled |= enabled[i]; |
||
1394 | } |
||
1395 | |||
1396 | if (any_enabled) |
||
1397 | return; |
||
1398 | |||
1399 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1400 | connector = fb_helper->connector_info[i]->connector; |
||
1401 | enabled[i] = drm_connector_enabled(connector, false); |
||
1402 | } |
||
1403 | } |
||
1404 | |||
3746 | Serge | 1405 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1406 | struct drm_display_mode **modes, |
||
5271 | serge | 1407 | struct drm_fb_offset *offsets, |
3746 | Serge | 1408 | bool *enabled, int width, int height) |
1409 | { |
||
1410 | int count, i, j; |
||
1411 | bool can_clone = false; |
||
1412 | struct drm_fb_helper_connector *fb_helper_conn; |
||
1413 | struct drm_display_mode *dmt_mode, *mode; |
||
1963 | serge | 1414 | |
3746 | Serge | 1415 | /* only contemplate cloning in the single crtc case */ |
1416 | if (fb_helper->crtc_count > 1) |
||
1417 | return false; |
||
1418 | |||
1419 | count = 0; |
||
1420 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1421 | if (enabled[i]) |
||
1422 | count++; |
||
1423 | } |
||
1424 | |||
1425 | /* only contemplate cloning if more than one connector is enabled */ |
||
1426 | if (count <= 1) |
||
1427 | return false; |
||
1428 | |||
1429 | /* check the command line or if nothing common pick 1024x768 */ |
||
1430 | can_clone = true; |
||
1431 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1432 | if (!enabled[i]) |
||
1433 | continue; |
||
1434 | fb_helper_conn = fb_helper->connector_info[i]; |
||
1435 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
||
1436 | if (!modes[i]) { |
||
1437 | can_clone = false; |
||
1438 | break; |
||
1439 | } |
||
1440 | for (j = 0; j < i; j++) { |
||
1441 | if (!enabled[j]) |
||
1442 | continue; |
||
1443 | if (!drm_mode_equal(modes[j], modes[i])) |
||
1444 | can_clone = false; |
||
1445 | } |
||
1446 | } |
||
1447 | |||
1448 | if (can_clone) { |
||
1449 | DRM_DEBUG_KMS("can clone using command line\n"); |
||
1450 | return true; |
||
1451 | } |
||
1452 | |||
1453 | /* try and find a 1024x768 mode on each connector */ |
||
1454 | can_clone = true; |
||
1455 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
||
1456 | |||
1457 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1458 | |||
1459 | if (!enabled[i]) |
||
1460 | continue; |
||
1461 | |||
1462 | fb_helper_conn = fb_helper->connector_info[i]; |
||
1463 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
||
1464 | if (drm_mode_equal(mode, dmt_mode)) |
||
1465 | modes[i] = mode; |
||
1466 | } |
||
1467 | if (!modes[i]) |
||
1468 | can_clone = false; |
||
1469 | } |
||
1470 | |||
1471 | if (can_clone) { |
||
1472 | DRM_DEBUG_KMS("can clone using 1024x768\n"); |
||
1473 | return true; |
||
1474 | } |
||
1475 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); |
||
1476 | return false; |
||
1477 | } |
||
1478 | |||
5271 | serge | 1479 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1480 | struct drm_display_mode **modes, |
||
1481 | struct drm_fb_offset *offsets, |
||
1482 | int idx, |
||
1483 | int h_idx, int v_idx) |
||
1484 | { |
||
1485 | struct drm_fb_helper_connector *fb_helper_conn; |
||
1486 | int i; |
||
1487 | int hoffset = 0, voffset = 0; |
||
1488 | |||
1489 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1490 | fb_helper_conn = fb_helper->connector_info[i]; |
||
1491 | if (!fb_helper_conn->connector->has_tile) |
||
1492 | continue; |
||
1493 | |||
1494 | if (!modes[i] && (h_idx || v_idx)) { |
||
1495 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, |
||
1496 | fb_helper_conn->connector->base.id); |
||
1497 | continue; |
||
1498 | } |
||
1499 | if (fb_helper_conn->connector->tile_h_loc < h_idx) |
||
1500 | hoffset += modes[i]->hdisplay; |
||
1501 | |||
1502 | if (fb_helper_conn->connector->tile_v_loc < v_idx) |
||
1503 | voffset += modes[i]->vdisplay; |
||
1504 | } |
||
1505 | offsets[idx].x = hoffset; |
||
1506 | offsets[idx].y = voffset; |
||
1507 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); |
||
1508 | return 0; |
||
1509 | } |
||
1510 | |||
1963 | serge | 1511 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
1512 | struct drm_display_mode **modes, |
||
5271 | serge | 1513 | struct drm_fb_offset *offsets, |
1963 | serge | 1514 | bool *enabled, int width, int height) |
1515 | { |
||
1516 | struct drm_fb_helper_connector *fb_helper_conn; |
||
1517 | int i; |
||
5271 | serge | 1518 | uint64_t conn_configured = 0, mask; |
1519 | int tile_pass = 0; |
||
1520 | mask = (1 << fb_helper->connector_count) - 1; |
||
1521 | retry: |
||
1963 | serge | 1522 | for (i = 0; i < fb_helper->connector_count; i++) { |
1523 | fb_helper_conn = fb_helper->connector_info[i]; |
||
1524 | |||
5271 | serge | 1525 | if (conn_configured & (1 << i)) |
1963 | serge | 1526 | continue; |
1527 | |||
5271 | serge | 1528 | if (enabled[i] == false) { |
1529 | conn_configured |= (1 << i); |
||
1530 | continue; |
||
1531 | } |
||
1532 | |||
1533 | /* first pass over all the untiled connectors */ |
||
1534 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) |
||
1535 | continue; |
||
1536 | |||
1537 | if (tile_pass == 1) { |
||
1538 | if (fb_helper_conn->connector->tile_h_loc != 0 || |
||
1539 | fb_helper_conn->connector->tile_v_loc != 0) |
||
6084 | serge | 1540 | continue; |
5271 | serge | 1541 | |
1542 | } else { |
||
1543 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && |
||
1544 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) |
||
1545 | /* if this tile_pass doesn't cover any of the tiles - keep going */ |
||
1546 | continue; |
||
1547 | |||
1548 | /* find the tile offsets for this pass - need |
||
1549 | to find all tiles left and above */ |
||
1550 | drm_get_tile_offsets(fb_helper, modes, offsets, |
||
1551 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); |
||
1552 | } |
||
1963 | serge | 1553 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
1554 | fb_helper_conn->connector->base.id); |
||
1555 | |||
1556 | /* got for command line mode first */ |
||
3746 | Serge | 1557 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
1963 | serge | 1558 | if (!modes[i]) { |
5271 | serge | 1559 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
1560 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); |
||
1963 | serge | 1561 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
1562 | } |
||
1563 | /* No preferred modes, pick one off the list */ |
||
1564 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
||
1565 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) |
||
1566 | break; |
||
1567 | } |
||
1568 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : |
||
1569 | "none"); |
||
5271 | serge | 1570 | conn_configured |= (1 << i); |
1963 | serge | 1571 | } |
5271 | serge | 1572 | |
1573 | if ((conn_configured & mask) != mask) { |
||
1574 | tile_pass++; |
||
1575 | goto retry; |
||
1576 | } |
||
1963 | serge | 1577 | return true; |
1578 | } |
||
1579 | |||
1580 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
||
1581 | struct drm_fb_helper_crtc **best_crtcs, |
||
1582 | struct drm_display_mode **modes, |
||
1583 | int n, int width, int height) |
||
1584 | { |
||
1585 | int c, o; |
||
1586 | struct drm_connector *connector; |
||
6084 | serge | 1587 | const struct drm_connector_helper_funcs *connector_funcs; |
1963 | serge | 1588 | struct drm_encoder *encoder; |
1589 | int my_score, best_score, score; |
||
1590 | struct drm_fb_helper_crtc **crtcs, *crtc; |
||
1591 | struct drm_fb_helper_connector *fb_helper_conn; |
||
1592 | |||
1593 | if (n == fb_helper->connector_count) |
||
1594 | return 0; |
||
1595 | |||
1596 | fb_helper_conn = fb_helper->connector_info[n]; |
||
1597 | connector = fb_helper_conn->connector; |
||
1598 | |||
1599 | best_crtcs[n] = NULL; |
||
1600 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
||
1601 | if (modes[n] == NULL) |
||
1602 | return best_score; |
||
1603 | |||
6660 | serge | 1604 | crtcs = kzalloc(fb_helper->connector_count * |
1963 | serge | 1605 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
1606 | if (!crtcs) |
||
1607 | return best_score; |
||
1608 | |||
1609 | my_score = 1; |
||
1610 | if (connector->status == connector_status_connected) |
||
1611 | my_score++; |
||
1612 | if (drm_has_cmdline_mode(fb_helper_conn)) |
||
1613 | my_score++; |
||
1614 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
||
1615 | my_score++; |
||
1616 | |||
1617 | connector_funcs = connector->helper_private; |
||
1618 | encoder = connector_funcs->best_encoder(connector); |
||
1619 | if (!encoder) |
||
1620 | goto out; |
||
1621 | |||
1622 | /* select a crtc for this connector and then attempt to configure |
||
1623 | remaining connectors */ |
||
1624 | for (c = 0; c < fb_helper->crtc_count; c++) { |
||
1625 | crtc = &fb_helper->crtc_info[c]; |
||
1626 | |||
3192 | Serge | 1627 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
1963 | serge | 1628 | continue; |
1629 | |||
1630 | for (o = 0; o < n; o++) |
||
1631 | if (best_crtcs[o] == crtc) |
||
1632 | break; |
||
1633 | |||
1634 | if (o < n) { |
||
1635 | /* ignore cloning unless only a single crtc */ |
||
1636 | if (fb_helper->crtc_count > 1) |
||
1637 | continue; |
||
1638 | |||
1639 | if (!drm_mode_equal(modes[o], modes[n])) |
||
1640 | continue; |
||
1641 | } |
||
1642 | |||
1643 | crtcs[n] = crtc; |
||
1644 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
||
1645 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, |
||
1646 | width, height); |
||
1647 | if (score > best_score) { |
||
1648 | best_score = score; |
||
1649 | memcpy(best_crtcs, crtcs, |
||
6660 | serge | 1650 | fb_helper->connector_count * |
1963 | serge | 1651 | sizeof(struct drm_fb_helper_crtc *)); |
1652 | } |
||
1653 | } |
||
1654 | out: |
||
1655 | kfree(crtcs); |
||
1656 | return best_score; |
||
1657 | } |
||
1658 | |||
1659 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
||
1660 | { |
||
1661 | struct drm_device *dev = fb_helper->dev; |
||
1662 | struct drm_fb_helper_crtc **crtcs; |
||
1663 | struct drm_display_mode **modes; |
||
5271 | serge | 1664 | struct drm_fb_offset *offsets; |
1963 | serge | 1665 | struct drm_mode_set *modeset; |
1666 | bool *enabled; |
||
1667 | int width, height; |
||
3746 | Serge | 1668 | int i; |
1963 | serge | 1669 | |
1670 | DRM_DEBUG_KMS("\n"); |
||
1671 | |||
1672 | width = dev->mode_config.max_width; |
||
1673 | height = dev->mode_config.max_height; |
||
1674 | |||
7144 | serge | 1675 | crtcs = kcalloc(fb_helper->connector_count, |
1963 | serge | 1676 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
7144 | serge | 1677 | modes = kcalloc(fb_helper->connector_count, |
1963 | serge | 1678 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
7144 | serge | 1679 | offsets = kcalloc(fb_helper->connector_count, |
5271 | serge | 1680 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
7144 | serge | 1681 | enabled = kcalloc(fb_helper->connector_count, |
1963 | serge | 1682 | sizeof(bool), GFP_KERNEL); |
5271 | serge | 1683 | if (!crtcs || !modes || !enabled || !offsets) { |
3192 | Serge | 1684 | DRM_ERROR("Memory allocation failed\n"); |
1685 | goto out; |
||
1686 | } |
||
1963 | serge | 1687 | |
3192 | Serge | 1688 | |
1963 | serge | 1689 | drm_enable_connectors(fb_helper, enabled); |
1690 | |||
3746 | Serge | 1691 | if (!(fb_helper->funcs->initial_config && |
1692 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, |
||
5271 | serge | 1693 | offsets, |
3746 | Serge | 1694 | enabled, width, height))) { |
7144 | serge | 1695 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
1696 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); |
||
1697 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); |
||
1963 | serge | 1698 | |
5271 | serge | 1699 | if (!drm_target_cloned(fb_helper, modes, offsets, |
1700 | enabled, width, height) && |
||
1701 | !drm_target_preferred(fb_helper, modes, offsets, |
||
1702 | enabled, width, height)) |
||
1963 | serge | 1703 | DRM_ERROR("Unable to find initial modes\n"); |
1704 | |||
3746 | Serge | 1705 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
1706 | width, height); |
||
1963 | serge | 1707 | |
6084 | serge | 1708 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
3746 | Serge | 1709 | } |
1963 | serge | 1710 | |
1711 | /* need to set the modesets up here for use later */ |
||
1712 | /* fill out the connector<->crtc mappings into the modesets */ |
||
1713 | for (i = 0; i < fb_helper->crtc_count; i++) { |
||
1714 | modeset = &fb_helper->crtc_info[i].mode_set; |
||
1715 | modeset->num_connectors = 0; |
||
3480 | Serge | 1716 | modeset->fb = NULL; |
1963 | serge | 1717 | } |
1718 | |||
1719 | for (i = 0; i < fb_helper->connector_count; i++) { |
||
1720 | struct drm_display_mode *mode = modes[i]; |
||
1721 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
||
5271 | serge | 1722 | struct drm_fb_offset *offset = &offsets[i]; |
1963 | serge | 1723 | modeset = &fb_crtc->mode_set; |
1724 | |||
1725 | if (mode && fb_crtc) { |
||
5271 | serge | 1726 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
1727 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); |
||
1963 | serge | 1728 | fb_crtc->desired_mode = mode; |
5271 | serge | 1729 | fb_crtc->x = offset->x; |
1730 | fb_crtc->y = offset->y; |
||
1963 | serge | 1731 | if (modeset->mode) |
1732 | drm_mode_destroy(dev, modeset->mode); |
||
1733 | modeset->mode = drm_mode_duplicate(dev, |
||
1734 | fb_crtc->desired_mode); |
||
1735 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
||
3480 | Serge | 1736 | modeset->fb = fb_helper->fb; |
5271 | serge | 1737 | modeset->x = offset->x; |
1738 | modeset->y = offset->y; |
||
1963 | serge | 1739 | } |
1740 | } |
||
1741 | |||
3480 | Serge | 1742 | /* Clear out any old modes if there are no more connected outputs. */ |
1743 | for (i = 0; i < fb_helper->crtc_count; i++) { |
||
1744 | modeset = &fb_helper->crtc_info[i].mode_set; |
||
1745 | if (modeset->num_connectors == 0) { |
||
1746 | BUG_ON(modeset->fb); |
||
1747 | if (modeset->mode) |
||
1748 | drm_mode_destroy(dev, modeset->mode); |
||
1749 | modeset->mode = NULL; |
||
1750 | } |
||
1751 | } |
||
3192 | Serge | 1752 | out: |
1963 | serge | 1753 | kfree(crtcs); |
1754 | kfree(modes); |
||
5271 | serge | 1755 | kfree(offsets); |
1963 | serge | 1756 | kfree(enabled); |
1757 | } |
||
1758 | |||
1759 | /** |
||
3480 | Serge | 1760 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
3192 | Serge | 1761 | * @fb_helper: fb_helper device struct |
1762 | * @bpp_sel: bpp value to use for the framebuffer configuration |
||
1963 | serge | 1763 | * |
3192 | Serge | 1764 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
1963 | serge | 1765 | * At the moment, this is a cloned configuration across all heads with |
1766 | * a new framebuffer object as the backing store. |
||
1767 | * |
||
3480 | Serge | 1768 | * Note that this also registers the fbdev and so allows userspace to call into |
1769 | * the driver through the fbdev interfaces. |
||
1770 | * |
||
1771 | * This function will call down into the ->fb_probe callback to let |
||
1772 | * the driver allocate and initialize the fbdev info structure and the drm |
||
1773 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and |
||
1774 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default |
||
1775 | * values for the fbdev info structure. |
||
1776 | * |
||
7144 | serge | 1777 | * HANG DEBUGGING: |
1778 | * |
||
1779 | * When you have fbcon support built-in or already loaded, this function will do |
||
1780 | * a full modeset to setup the fbdev console. Due to locking misdesign in the |
||
1781 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding |
||
1782 | * console_lock. Until console_unlock is called no dmesg lines will be sent out |
||
1783 | * to consoles, not even serial console. This means when your driver crashes, |
||
1784 | * you will see absolutely nothing else but a system stuck in this function, |
||
1785 | * with no further output. Any kind of printk() you place within your own driver |
||
1786 | * or in the drm core modeset code will also never show up. |
||
1787 | * |
||
1788 | * Standard debug practice is to run the fbcon setup without taking the |
||
1789 | * console_lock as a hack, to be able to see backtraces and crashes on the |
||
1790 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel |
||
1791 | * cmdline option. |
||
1792 | * |
||
1793 | * The other option is to just disable fbdev emulation since very likely the |
||
1794 | * first modest from userspace will crash in the same way, and is even easier to |
||
1795 | * debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 |
||
1796 | * kernel cmdline option. |
||
1797 | * |
||
1963 | serge | 1798 | * RETURNS: |
1799 | * Zero if everything went ok, nonzero otherwise. |
||
1800 | */ |
||
6084 | serge | 1801 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
1963 | serge | 1802 | { |
1803 | struct drm_device *dev = fb_helper->dev; |
||
1804 | int count = 0; |
||
1805 | |||
6084 | serge | 1806 | if (!drm_fbdev_emulation) |
1807 | return 0; |
||
1808 | |||
5060 | serge | 1809 | mutex_lock(&dev->mode_config.mutex); |
1963 | serge | 1810 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
1811 | dev->mode_config.max_width, |
||
1812 | dev->mode_config.max_height); |
||
5060 | serge | 1813 | mutex_unlock(&dev->mode_config.mutex); |
1963 | serge | 1814 | /* |
1815 | * we shouldn't end up with no modes here. |
||
1816 | */ |
||
3192 | Serge | 1817 | if (count == 0) |
1818 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
||
1819 | |||
1820 | drm_setup_crtcs(fb_helper); |
||
1821 | |||
3243 | Serge | 1822 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
3192 | Serge | 1823 | } |
1824 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
||
1825 | |||
1826 | /** |
||
1827 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by |
||
1828 | * probing all the outputs attached to the fb |
||
1829 | * @fb_helper: the drm_fb_helper |
||
1830 | * |
||
1831 | * Scan the connectors attached to the fb_helper and try to put together a |
||
1832 | * setup after *notification of a change in output configuration. |
||
1833 | * |
||
3480 | Serge | 1834 | * Called at runtime, takes the mode config locks to be able to check/change the |
1835 | * modeset configuration. Must be run from process context (which usually means |
||
1836 | * either the output polling work or a work item launched from the driver's |
||
1837 | * hotplug interrupt). |
||
1838 | * |
||
5060 | serge | 1839 | * Note that drivers may call this even before calling |
1840 | * drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows |
||
1841 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
||
1842 | * not miss any hotplug events. |
||
3480 | Serge | 1843 | * |
3192 | Serge | 1844 | * RETURNS: |
1845 | * 0 on success and a non-zero error code otherwise. |
||
1846 | */ |
||
1847 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) |
||
1848 | { |
||
1849 | struct drm_device *dev = fb_helper->dev; |
||
4560 | Serge | 1850 | u32 max_width, max_height; |
3192 | Serge | 1851 | |
7144 | serge | 1852 | ENTER(); |
1853 | |||
6084 | serge | 1854 | if (!drm_fbdev_emulation) |
1855 | return 0; |
||
1856 | |||
3480 | Serge | 1857 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
5060 | serge | 1858 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
3192 | Serge | 1859 | fb_helper->delayed_hotplug = true; |
3480 | Serge | 1860 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
3192 | Serge | 1861 | return 0; |
1862 | } |
||
1863 | DRM_DEBUG_KMS("\n"); |
||
1864 | |||
6296 | serge | 1865 | max_width = 8192; //fb_helper->fb->width; |
1866 | max_height = 8192; //fb_helper->fb->height; |
||
3192 | Serge | 1867 | |
4560 | Serge | 1868 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
3480 | Serge | 1869 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
1870 | |||
6296 | serge | 1871 | // drm_modeset_lock_all(dev); |
1872 | // drm_setup_crtcs(fb_helper); |
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1873 | // drm_modeset_unlock_all(dev); |
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1874 | // drm_fb_helper_set_par(fb_helper->fbdev); |
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7144 | serge | 1875 | LEAVE(); |
3480 | Serge | 1876 | return 0; |
1963 | serge | 1877 | } |
3192 | Serge | 1878 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
1879 | |||
4560 | Serge | 1880 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
1881 | * but the module doesn't depend on any fb console symbols. At least |
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1882 | * attempt to load fbcon to avoid leaving the system without a usable console. |
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1883 | */ |
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7144 | serge | 1884 | int __init drm_fb_helper_modinit(void) |
1885 | { |
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4560 | Serge | 1886 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
1887 | const char *name = "fbcon"; |
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1888 | struct module *fbcon; |
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3192 | Serge | 1889 | |
4560 | Serge | 1890 | mutex_lock(&module_mutex); |
1891 | fbcon = find_module(name); |
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1892 | mutex_unlock(&module_mutex); |
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3192 | Serge | 1893 | |
4560 | Serge | 1894 | if (!fbcon) |
1895 | request_module_nowait(name); |
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7144 | serge | 1896 | #endif |
4560 | Serge | 1897 | return 0; |
1898 | } |
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7144 | serge | 1899 | EXPORT_SYMBOL(drm_fb_helper_modinit);>>>->>>><>>><>><>><>>><>>>>>>>=>>>>>>>>>>>><>>>>>>>><>=><=>><>><>><>><>>>>>>>>>><>>>>>>>> |