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1123 | serge | 1 | /* |
2 | * Copyright © 1997-2003 by The XFree86 Project, Inc. |
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3 | * Copyright © 2007 Dave Airlie |
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4 | * Copyright © 2007-2008 Intel Corporation |
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5 | * Jesse Barnes |
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1179 | serge | 6 | * Copyright 2005-2006 Luc Verhaegen |
7 | * Copyright (c) 2001, Andy Ritger aritger@nvidia.com |
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1123 | serge | 8 | * |
9 | * Permission is hereby granted, free of charge, to any person obtaining a |
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10 | * copy of this software and associated documentation files (the "Software"), |
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11 | * to deal in the Software without restriction, including without limitation |
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12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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13 | * and/or sell copies of the Software, and to permit persons to whom the |
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14 | * Software is furnished to do so, subject to the following conditions: |
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15 | * |
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16 | * The above copyright notice and this permission notice shall be included in |
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17 | * all copies or substantial portions of the Software. |
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18 | * |
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19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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22 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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23 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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24 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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25 | * OTHER DEALINGS IN THE SOFTWARE. |
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26 | * |
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27 | * Except as contained in this notice, the name of the copyright holder(s) |
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28 | * and author(s) shall not be used in advertising or otherwise to promote |
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29 | * the sale, use or other dealings in this Software without prior written |
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30 | * authorization from the copyright holder(s) and author(s). |
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31 | */ |
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32 | |||
1179 | serge | 33 | #include |
1404 | serge | 34 | #include |
3031 | serge | 35 | #include |
36 | #include |
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37 | #include |
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6084 | serge | 38 | #include |
39 | #include |
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5060 | serge | 40 | #include |
1123 | serge | 41 | |
5060 | serge | 42 | #include "drm_crtc_internal.h" |
43 | |||
1123 | serge | 44 | /** |
5060 | serge | 45 | * drm_mode_debug_printmodeline - print a mode to dmesg |
1123 | serge | 46 | * @mode: mode to print |
47 | * |
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48 | * Describe @mode using DRM_DEBUG. |
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49 | */ |
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3192 | Serge | 50 | void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) |
1123 | serge | 51 | { |
1179 | serge | 52 | DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " |
53 | "0x%x 0x%x\n", |
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1123 | serge | 54 | mode->base.id, mode->name, mode->vrefresh, mode->clock, |
55 | mode->hdisplay, mode->hsync_start, |
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56 | mode->hsync_end, mode->htotal, |
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57 | mode->vdisplay, mode->vsync_start, |
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58 | mode->vsync_end, mode->vtotal, mode->type, mode->flags); |
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59 | } |
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60 | EXPORT_SYMBOL(drm_mode_debug_printmodeline); |
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61 | |||
62 | /** |
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5060 | serge | 63 | * drm_mode_create - create a new display mode |
1179 | serge | 64 | * @dev: DRM device |
5060 | serge | 65 | * |
66 | * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it |
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67 | * and return it. |
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68 | * |
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69 | * Returns: |
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70 | * Pointer to new mode on success, NULL on error. |
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71 | */ |
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72 | struct drm_display_mode *drm_mode_create(struct drm_device *dev) |
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73 | { |
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74 | struct drm_display_mode *nmode; |
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75 | |||
76 | nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); |
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77 | if (!nmode) |
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78 | return NULL; |
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79 | |||
80 | if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) { |
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81 | kfree(nmode); |
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82 | return NULL; |
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83 | } |
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84 | |||
85 | return nmode; |
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86 | } |
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87 | EXPORT_SYMBOL(drm_mode_create); |
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88 | |||
89 | /** |
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90 | * drm_mode_destroy - remove a mode |
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91 | * @dev: DRM device |
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92 | * @mode: mode to remove |
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93 | * |
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94 | * Release @mode's unique ID, then free it @mode structure itself using kfree. |
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95 | */ |
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96 | void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) |
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97 | { |
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98 | if (!mode) |
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99 | return; |
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100 | |||
101 | drm_mode_object_put(dev, &mode->base); |
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102 | |||
103 | kfree(mode); |
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104 | } |
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105 | EXPORT_SYMBOL(drm_mode_destroy); |
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106 | |||
107 | /** |
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108 | * drm_mode_probed_add - add a mode to a connector's probed_mode list |
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109 | * @connector: connector the new mode |
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110 | * @mode: mode data |
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111 | * |
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112 | * Add @mode to @connector's probed_mode list for later use. This list should |
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113 | * then in a second step get filtered and all the modes actually supported by |
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114 | * the hardware moved to the @connector's modes list. |
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115 | */ |
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116 | void drm_mode_probed_add(struct drm_connector *connector, |
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117 | struct drm_display_mode *mode) |
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118 | { |
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119 | WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); |
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120 | |||
121 | list_add_tail(&mode->head, &connector->probed_modes); |
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122 | } |
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123 | EXPORT_SYMBOL(drm_mode_probed_add); |
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124 | |||
125 | /** |
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126 | * drm_cvt_mode -create a modeline based on the CVT algorithm |
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127 | * @dev: drm device |
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1179 | serge | 128 | * @hdisplay: hdisplay size |
129 | * @vdisplay: vdisplay size |
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5060 | serge | 130 | * @vrefresh: vrefresh rate |
131 | * @reduced: whether to use reduced blanking |
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132 | * @interlaced: whether to compute an interlaced mode |
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133 | * @margins: whether to add margins (borders) |
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1179 | serge | 134 | * |
135 | * This function is called to generate the modeline based on CVT algorithm |
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136 | * according to the hdisplay, vdisplay, vrefresh. |
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137 | * It is based from the VESA(TM) Coordinated Video Timing Generator by |
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138 | * Graham Loveridge April 9, 2003 available at |
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1963 | serge | 139 | * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls |
1179 | serge | 140 | * |
141 | * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. |
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142 | * What I have done is to translate it by using integer calculation. |
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5060 | serge | 143 | * |
144 | * Returns: |
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145 | * The modeline based on the CVT algorithm stored in a drm_display_mode object. |
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146 | * The display mode object is allocated with drm_mode_create(). Returns NULL |
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147 | * when no mode could be allocated. |
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1179 | serge | 148 | */ |
149 | struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, |
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150 | int vdisplay, int vrefresh, |
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1221 | serge | 151 | bool reduced, bool interlaced, bool margins) |
1179 | serge | 152 | { |
5060 | serge | 153 | #define HV_FACTOR 1000 |
1179 | serge | 154 | /* 1) top/bottom margin size (% of height) - default: 1.8, */ |
155 | #define CVT_MARGIN_PERCENTAGE 18 |
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156 | /* 2) character cell horizontal granularity (pixels) - default 8 */ |
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157 | #define CVT_H_GRANULARITY 8 |
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158 | /* 3) Minimum vertical porch (lines) - default 3 */ |
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159 | #define CVT_MIN_V_PORCH 3 |
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160 | /* 4) Minimum number of vertical back porch lines - default 6 */ |
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161 | #define CVT_MIN_V_BPORCH 6 |
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162 | /* Pixel Clock step (kHz) */ |
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163 | #define CVT_CLOCK_STEP 250 |
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164 | struct drm_display_mode *drm_mode; |
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165 | unsigned int vfieldrate, hperiod; |
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166 | int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; |
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167 | int interlace; |
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168 | |||
169 | /* allocate the drm_display_mode structure. If failure, we will |
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170 | * return directly |
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171 | */ |
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172 | drm_mode = drm_mode_create(dev); |
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173 | if (!drm_mode) |
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174 | return NULL; |
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175 | |||
176 | /* the CVT default refresh rate is 60Hz */ |
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177 | if (!vrefresh) |
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178 | vrefresh = 60; |
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179 | |||
180 | /* the required field fresh rate */ |
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181 | if (interlaced) |
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182 | vfieldrate = vrefresh * 2; |
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183 | else |
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184 | vfieldrate = vrefresh; |
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185 | |||
186 | /* horizontal pixels */ |
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187 | hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); |
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188 | |||
189 | /* determine the left&right borders */ |
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190 | hmargin = 0; |
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191 | if (margins) { |
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192 | hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; |
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193 | hmargin -= hmargin % CVT_H_GRANULARITY; |
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194 | } |
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195 | /* find the total active pixels */ |
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196 | drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; |
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197 | |||
198 | /* find the number of lines per field */ |
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199 | if (interlaced) |
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200 | vdisplay_rnd = vdisplay / 2; |
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201 | else |
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202 | vdisplay_rnd = vdisplay; |
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203 | |||
204 | /* find the top & bottom borders */ |
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205 | vmargin = 0; |
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206 | if (margins) |
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207 | vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; |
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208 | |||
209 | drm_mode->vdisplay = vdisplay + 2 * vmargin; |
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210 | |||
211 | /* Interlaced */ |
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212 | if (interlaced) |
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213 | interlace = 1; |
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214 | else |
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215 | interlace = 0; |
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216 | |||
217 | /* Determine VSync Width from aspect ratio */ |
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218 | if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) |
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219 | vsync = 4; |
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220 | else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) |
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221 | vsync = 5; |
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222 | else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) |
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223 | vsync = 6; |
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224 | else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) |
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225 | vsync = 7; |
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226 | else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) |
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227 | vsync = 7; |
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228 | else /* custom */ |
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229 | vsync = 10; |
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230 | |||
231 | if (!reduced) { |
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232 | /* simplify the GTF calculation */ |
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233 | /* 4) Minimum time of vertical sync + back porch interval (µs) |
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234 | * default 550.0 |
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235 | */ |
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236 | int tmp1, tmp2; |
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237 | #define CVT_MIN_VSYNC_BP 550 |
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238 | /* 3) Nominal HSync width (% of line period) - default 8 */ |
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239 | #define CVT_HSYNC_PERCENTAGE 8 |
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240 | unsigned int hblank_percentage; |
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241 | int vsyncandback_porch, vback_porch, hblank; |
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242 | |||
243 | /* estimated the horizontal period */ |
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244 | tmp1 = HV_FACTOR * 1000000 - |
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245 | CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; |
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246 | tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + |
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247 | interlace; |
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248 | hperiod = tmp1 * 2 / (tmp2 * vfieldrate); |
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249 | |||
250 | tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; |
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251 | /* 9. Find number of lines in sync + backporch */ |
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252 | if (tmp1 < (vsync + CVT_MIN_V_PORCH)) |
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253 | vsyncandback_porch = vsync + CVT_MIN_V_PORCH; |
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254 | else |
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255 | vsyncandback_porch = tmp1; |
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256 | /* 10. Find number of lines in back porch */ |
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257 | vback_porch = vsyncandback_porch - vsync; |
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258 | drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + |
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259 | vsyncandback_porch + CVT_MIN_V_PORCH; |
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260 | /* 5) Definition of Horizontal blanking time limitation */ |
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261 | /* Gradient (%/kHz) - default 600 */ |
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262 | #define CVT_M_FACTOR 600 |
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263 | /* Offset (%) - default 40 */ |
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264 | #define CVT_C_FACTOR 40 |
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265 | /* Blanking time scaling factor - default 128 */ |
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266 | #define CVT_K_FACTOR 128 |
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267 | /* Scaling factor weighting - default 20 */ |
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268 | #define CVT_J_FACTOR 20 |
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269 | #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) |
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270 | #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ |
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271 | CVT_J_FACTOR) |
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272 | /* 12. Find ideal blanking duty cycle from formula */ |
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273 | hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * |
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274 | hperiod / 1000; |
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275 | /* 13. Blanking time */ |
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276 | if (hblank_percentage < 20 * HV_FACTOR) |
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277 | hblank_percentage = 20 * HV_FACTOR; |
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278 | hblank = drm_mode->hdisplay * hblank_percentage / |
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279 | (100 * HV_FACTOR - hblank_percentage); |
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280 | hblank -= hblank % (2 * CVT_H_GRANULARITY); |
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6084 | serge | 281 | /* 14. find the total pixels per line */ |
1179 | serge | 282 | drm_mode->htotal = drm_mode->hdisplay + hblank; |
283 | drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; |
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284 | drm_mode->hsync_start = drm_mode->hsync_end - |
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285 | (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; |
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286 | drm_mode->hsync_start += CVT_H_GRANULARITY - |
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287 | drm_mode->hsync_start % CVT_H_GRANULARITY; |
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288 | /* fill the Vsync values */ |
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289 | drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; |
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290 | drm_mode->vsync_end = drm_mode->vsync_start + vsync; |
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291 | } else { |
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292 | /* Reduced blanking */ |
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293 | /* Minimum vertical blanking interval time (µs)- default 460 */ |
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294 | #define CVT_RB_MIN_VBLANK 460 |
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295 | /* Fixed number of clocks for horizontal sync */ |
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296 | #define CVT_RB_H_SYNC 32 |
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297 | /* Fixed number of clocks for horizontal blanking */ |
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298 | #define CVT_RB_H_BLANK 160 |
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299 | /* Fixed number of lines for vertical front porch - default 3*/ |
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300 | #define CVT_RB_VFPORCH 3 |
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301 | int vbilines; |
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302 | int tmp1, tmp2; |
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303 | /* 8. Estimate Horizontal period. */ |
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304 | tmp1 = HV_FACTOR * 1000000 - |
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305 | CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; |
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306 | tmp2 = vdisplay_rnd + 2 * vmargin; |
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307 | hperiod = tmp1 / (tmp2 * vfieldrate); |
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308 | /* 9. Find number of lines in vertical blanking */ |
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309 | vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; |
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310 | /* 10. Check if vertical blanking is sufficient */ |
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311 | if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) |
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312 | vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; |
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313 | /* 11. Find total number of lines in vertical field */ |
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314 | drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; |
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315 | /* 12. Find total number of pixels in a line */ |
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316 | drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; |
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317 | /* Fill in HSync values */ |
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318 | drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; |
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1963 | serge | 319 | drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; |
320 | /* Fill in VSync values */ |
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321 | drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; |
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322 | drm_mode->vsync_end = drm_mode->vsync_start + vsync; |
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1179 | serge | 323 | } |
324 | /* 15/13. Find pixel clock frequency (kHz for xf86) */ |
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325 | drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; |
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326 | drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; |
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327 | /* 18/16. Find actual vertical frame frequency */ |
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328 | /* ignore - just set the mode flag for interlaced */ |
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1963 | serge | 329 | if (interlaced) { |
1179 | serge | 330 | drm_mode->vtotal *= 2; |
1963 | serge | 331 | drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
332 | } |
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1179 | serge | 333 | /* Fill the mode line name */ |
334 | drm_mode_set_name(drm_mode); |
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335 | if (reduced) |
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336 | drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | |
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337 | DRM_MODE_FLAG_NVSYNC); |
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338 | else |
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339 | drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | |
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340 | DRM_MODE_FLAG_NHSYNC); |
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341 | |||
6084 | serge | 342 | return drm_mode; |
1179 | serge | 343 | } |
344 | EXPORT_SYMBOL(drm_cvt_mode); |
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345 | |||
346 | /** |
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5060 | serge | 347 | * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm |
348 | * @dev: drm device |
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349 | * @hdisplay: hdisplay size |
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350 | * @vdisplay: vdisplay size |
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351 | * @vrefresh: vrefresh rate. |
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352 | * @interlaced: whether to compute an interlaced mode |
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353 | * @margins: desired margin (borders) size |
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354 | * @GTF_M: extended GTF formula parameters |
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355 | * @GTF_2C: extended GTF formula parameters |
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356 | * @GTF_K: extended GTF formula parameters |
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357 | * @GTF_2J: extended GTF formula parameters |
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1179 | serge | 358 | * |
1963 | serge | 359 | * GTF feature blocks specify C and J in multiples of 0.5, so we pass them |
360 | * in here multiplied by two. For a C of 40, pass in 80. |
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5060 | serge | 361 | * |
362 | * Returns: |
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363 | * The modeline based on the full GTF algorithm stored in a drm_display_mode object. |
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364 | * The display mode object is allocated with drm_mode_create(). Returns NULL |
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365 | * when no mode could be allocated. |
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1179 | serge | 366 | */ |
1963 | serge | 367 | struct drm_display_mode * |
368 | drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, |
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369 | int vrefresh, bool interlaced, int margins, |
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370 | int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) |
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371 | { /* 1) top/bottom margin size (% of height) - default: 1.8, */ |
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1179 | serge | 372 | #define GTF_MARGIN_PERCENTAGE 18 |
373 | /* 2) character cell horizontal granularity (pixels) - default 8 */ |
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374 | #define GTF_CELL_GRAN 8 |
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375 | /* 3) Minimum vertical porch (lines) - default 3 */ |
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376 | #define GTF_MIN_V_PORCH 1 |
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377 | /* width of vsync in lines */ |
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378 | #define V_SYNC_RQD 3 |
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379 | /* width of hsync as % of total line */ |
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380 | #define H_SYNC_PERCENT 8 |
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381 | /* min time of vsync + back porch (microsec) */ |
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382 | #define MIN_VSYNC_PLUS_BP 550 |
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383 | /* C' and M' are part of the Blanking Duty Cycle computation */ |
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1963 | serge | 384 | #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) |
6084 | serge | 385 | #define GTF_M_PRIME (GTF_K * GTF_M / 256) |
1179 | serge | 386 | struct drm_display_mode *drm_mode; |
387 | unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; |
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388 | int top_margin, bottom_margin; |
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389 | int interlace; |
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390 | unsigned int hfreq_est; |
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391 | int vsync_plus_bp, vback_porch; |
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392 | unsigned int vtotal_lines, vfieldrate_est, hperiod; |
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393 | unsigned int vfield_rate, vframe_rate; |
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394 | int left_margin, right_margin; |
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395 | unsigned int total_active_pixels, ideal_duty_cycle; |
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396 | unsigned int hblank, total_pixels, pixel_freq; |
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397 | int hsync, hfront_porch, vodd_front_porch_lines; |
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398 | unsigned int tmp1, tmp2; |
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399 | |||
400 | drm_mode = drm_mode_create(dev); |
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401 | if (!drm_mode) |
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402 | return NULL; |
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403 | |||
404 | /* 1. In order to give correct results, the number of horizontal |
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405 | * pixels requested is first processed to ensure that it is divisible |
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406 | * by the character size, by rounding it to the nearest character |
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407 | * cell boundary: |
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408 | */ |
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409 | hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; |
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410 | hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; |
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411 | |||
412 | /* 2. If interlace is requested, the number of vertical lines assumed |
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413 | * by the calculation must be halved, as the computation calculates |
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414 | * the number of vertical lines per field. |
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415 | */ |
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416 | if (interlaced) |
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417 | vdisplay_rnd = vdisplay / 2; |
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418 | else |
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419 | vdisplay_rnd = vdisplay; |
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420 | |||
421 | /* 3. Find the frame rate required: */ |
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422 | if (interlaced) |
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423 | vfieldrate_rqd = vrefresh * 2; |
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424 | else |
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425 | vfieldrate_rqd = vrefresh; |
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426 | |||
427 | /* 4. Find number of lines in Top margin: */ |
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428 | top_margin = 0; |
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429 | if (margins) |
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430 | top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / |
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431 | 1000; |
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432 | /* 5. Find number of lines in bottom margin: */ |
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433 | bottom_margin = top_margin; |
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434 | |||
435 | /* 6. If interlace is required, then set variable interlace: */ |
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436 | if (interlaced) |
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437 | interlace = 1; |
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438 | else |
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439 | interlace = 0; |
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440 | |||
441 | /* 7. Estimate the Horizontal frequency */ |
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442 | { |
||
443 | tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; |
||
444 | tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * |
||
445 | 2 + interlace; |
||
446 | hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; |
||
447 | } |
||
448 | |||
449 | /* 8. Find the number of lines in V sync + back porch */ |
||
450 | /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ |
||
451 | vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; |
||
452 | vsync_plus_bp = (vsync_plus_bp + 500) / 1000; |
||
453 | /* 9. Find the number of lines in V back porch alone: */ |
||
454 | vback_porch = vsync_plus_bp - V_SYNC_RQD; |
||
455 | /* 10. Find the total number of lines in Vertical field period: */ |
||
456 | vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + |
||
457 | vsync_plus_bp + GTF_MIN_V_PORCH; |
||
458 | /* 11. Estimate the Vertical field frequency: */ |
||
459 | vfieldrate_est = hfreq_est / vtotal_lines; |
||
460 | /* 12. Find the actual horizontal period: */ |
||
461 | hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); |
||
462 | |||
463 | /* 13. Find the actual Vertical field frequency: */ |
||
464 | vfield_rate = hfreq_est / vtotal_lines; |
||
465 | /* 14. Find the Vertical frame frequency: */ |
||
466 | if (interlaced) |
||
467 | vframe_rate = vfield_rate / 2; |
||
468 | else |
||
469 | vframe_rate = vfield_rate; |
||
470 | /* 15. Find number of pixels in left margin: */ |
||
471 | if (margins) |
||
472 | left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / |
||
473 | 1000; |
||
474 | else |
||
475 | left_margin = 0; |
||
476 | |||
477 | /* 16.Find number of pixels in right margin: */ |
||
478 | right_margin = left_margin; |
||
479 | /* 17.Find total number of active pixels in image and left and right */ |
||
480 | total_active_pixels = hdisplay_rnd + left_margin + right_margin; |
||
481 | /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ |
||
482 | ideal_duty_cycle = GTF_C_PRIME * 1000 - |
||
483 | (GTF_M_PRIME * 1000000 / hfreq_est); |
||
484 | /* 19.Find the number of pixels in the blanking time to the nearest |
||
485 | * double character cell: */ |
||
486 | hblank = total_active_pixels * ideal_duty_cycle / |
||
487 | (100000 - ideal_duty_cycle); |
||
488 | hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); |
||
489 | hblank = hblank * 2 * GTF_CELL_GRAN; |
||
490 | /* 20.Find total number of pixels: */ |
||
491 | total_pixels = total_active_pixels + hblank; |
||
492 | /* 21.Find pixel clock frequency: */ |
||
493 | pixel_freq = total_pixels * hfreq_est / 1000; |
||
494 | /* Stage 1 computations are now complete; I should really pass |
||
495 | * the results to another function and do the Stage 2 computations, |
||
496 | * but I only need a few more values so I'll just append the |
||
497 | * computations here for now */ |
||
498 | /* 17. Find the number of pixels in the horizontal sync period: */ |
||
499 | hsync = H_SYNC_PERCENT * total_pixels / 100; |
||
500 | hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; |
||
501 | hsync = hsync * GTF_CELL_GRAN; |
||
502 | /* 18. Find the number of pixels in horizontal front porch period */ |
||
503 | hfront_porch = hblank / 2 - hsync; |
||
504 | /* 36. Find the number of lines in the odd front porch period: */ |
||
505 | vodd_front_porch_lines = GTF_MIN_V_PORCH ; |
||
506 | |||
507 | /* finally, pack the results in the mode struct */ |
||
508 | drm_mode->hdisplay = hdisplay_rnd; |
||
509 | drm_mode->hsync_start = hdisplay_rnd + hfront_porch; |
||
510 | drm_mode->hsync_end = drm_mode->hsync_start + hsync; |
||
511 | drm_mode->htotal = total_pixels; |
||
512 | drm_mode->vdisplay = vdisplay_rnd; |
||
513 | drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; |
||
514 | drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; |
||
515 | drm_mode->vtotal = vtotal_lines; |
||
516 | |||
517 | drm_mode->clock = pixel_freq; |
||
518 | |||
519 | if (interlaced) { |
||
520 | drm_mode->vtotal *= 2; |
||
521 | drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
||
522 | } |
||
523 | |||
1963 | serge | 524 | drm_mode_set_name(drm_mode); |
525 | if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) |
||
526 | drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; |
||
527 | else |
||
528 | drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; |
||
529 | |||
1179 | serge | 530 | return drm_mode; |
531 | } |
||
1963 | serge | 532 | EXPORT_SYMBOL(drm_gtf_mode_complex); |
533 | |||
534 | /** |
||
5060 | serge | 535 | * drm_gtf_mode - create the modeline based on the GTF algorithm |
536 | * @dev: drm device |
||
537 | * @hdisplay: hdisplay size |
||
538 | * @vdisplay: vdisplay size |
||
539 | * @vrefresh: vrefresh rate. |
||
540 | * @interlaced: whether to compute an interlaced mode |
||
541 | * @margins: desired margin (borders) size |
||
1963 | serge | 542 | * |
543 | * return the modeline based on GTF algorithm |
||
544 | * |
||
545 | * This function is to create the modeline based on the GTF algorithm. |
||
546 | * Generalized Timing Formula is derived from: |
||
547 | * GTF Spreadsheet by Andy Morrish (1/5/97) |
||
548 | * available at http://www.vesa.org |
||
549 | * |
||
550 | * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. |
||
551 | * What I have done is to translate it by using integer calculation. |
||
552 | * I also refer to the function of fb_get_mode in the file of |
||
553 | * drivers/video/fbmon.c |
||
554 | * |
||
555 | * Standard GTF parameters: |
||
7144 | serge | 556 | * M = 600 |
557 | * C = 40 |
||
558 | * K = 128 |
||
559 | * J = 20 |
||
5060 | serge | 560 | * |
561 | * Returns: |
||
562 | * The modeline based on the GTF algorithm stored in a drm_display_mode object. |
||
563 | * The display mode object is allocated with drm_mode_create(). Returns NULL |
||
564 | * when no mode could be allocated. |
||
1963 | serge | 565 | */ |
566 | struct drm_display_mode * |
||
567 | drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, |
||
5060 | serge | 568 | bool interlaced, int margins) |
1963 | serge | 569 | { |
5060 | serge | 570 | return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, |
571 | interlaced, margins, |
||
572 | 600, 40 * 2, 128, 20 * 2); |
||
1963 | serge | 573 | } |
1179 | serge | 574 | EXPORT_SYMBOL(drm_gtf_mode); |
1963 | serge | 575 | |
3746 | Serge | 576 | #ifdef CONFIG_VIDEOMODE_HELPERS |
5060 | serge | 577 | /** |
578 | * drm_display_mode_from_videomode - fill in @dmode using @vm, |
||
579 | * @vm: videomode structure to use as source |
||
580 | * @dmode: drm_display_mode structure to use as destination |
||
581 | * |
||
582 | * Fills out @dmode using the display mode specified in @vm. |
||
583 | */ |
||
584 | void drm_display_mode_from_videomode(const struct videomode *vm, |
||
6084 | serge | 585 | struct drm_display_mode *dmode) |
3480 | Serge | 586 | { |
587 | dmode->hdisplay = vm->hactive; |
||
588 | dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; |
||
589 | dmode->hsync_end = dmode->hsync_start + vm->hsync_len; |
||
590 | dmode->htotal = dmode->hsync_end + vm->hback_porch; |
||
591 | |||
592 | dmode->vdisplay = vm->vactive; |
||
593 | dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; |
||
594 | dmode->vsync_end = dmode->vsync_start + vm->vsync_len; |
||
595 | dmode->vtotal = dmode->vsync_end + vm->vback_porch; |
||
596 | |||
597 | dmode->clock = vm->pixelclock / 1000; |
||
598 | |||
599 | dmode->flags = 0; |
||
3746 | Serge | 600 | if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) |
3480 | Serge | 601 | dmode->flags |= DRM_MODE_FLAG_PHSYNC; |
3746 | Serge | 602 | else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) |
3480 | Serge | 603 | dmode->flags |= DRM_MODE_FLAG_NHSYNC; |
3746 | Serge | 604 | if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) |
3480 | Serge | 605 | dmode->flags |= DRM_MODE_FLAG_PVSYNC; |
3746 | Serge | 606 | else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) |
3480 | Serge | 607 | dmode->flags |= DRM_MODE_FLAG_NVSYNC; |
3746 | Serge | 608 | if (vm->flags & DISPLAY_FLAGS_INTERLACED) |
3480 | Serge | 609 | dmode->flags |= DRM_MODE_FLAG_INTERLACE; |
3746 | Serge | 610 | if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) |
3480 | Serge | 611 | dmode->flags |= DRM_MODE_FLAG_DBLSCAN; |
4075 | Serge | 612 | if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) |
613 | dmode->flags |= DRM_MODE_FLAG_DBLCLK; |
||
3480 | Serge | 614 | drm_mode_set_name(dmode); |
615 | } |
||
616 | EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); |
||
617 | |||
6084 | serge | 618 | /** |
619 | * drm_display_mode_to_videomode - fill in @vm using @dmode, |
||
620 | * @dmode: drm_display_mode structure to use as source |
||
621 | * @vm: videomode structure to use as destination |
||
622 | * |
||
623 | * Fills out @vm using the display mode specified in @dmode. |
||
624 | */ |
||
625 | void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, |
||
626 | struct videomode *vm) |
||
627 | { |
||
628 | vm->hactive = dmode->hdisplay; |
||
629 | vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; |
||
630 | vm->hsync_len = dmode->hsync_end - dmode->hsync_start; |
||
631 | vm->hback_porch = dmode->htotal - dmode->hsync_end; |
||
632 | |||
633 | vm->vactive = dmode->vdisplay; |
||
634 | vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; |
||
635 | vm->vsync_len = dmode->vsync_end - dmode->vsync_start; |
||
636 | vm->vback_porch = dmode->vtotal - dmode->vsync_end; |
||
637 | |||
638 | vm->pixelclock = dmode->clock * 1000; |
||
639 | |||
640 | vm->flags = 0; |
||
641 | if (dmode->flags & DRM_MODE_FLAG_PHSYNC) |
||
642 | vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; |
||
643 | else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) |
||
644 | vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; |
||
645 | if (dmode->flags & DRM_MODE_FLAG_PVSYNC) |
||
646 | vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; |
||
647 | else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) |
||
648 | vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; |
||
649 | if (dmode->flags & DRM_MODE_FLAG_INTERLACE) |
||
650 | vm->flags |= DISPLAY_FLAGS_INTERLACED; |
||
651 | if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) |
||
652 | vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; |
||
653 | if (dmode->flags & DRM_MODE_FLAG_DBLCLK) |
||
654 | vm->flags |= DISPLAY_FLAGS_DOUBLECLK; |
||
655 | } |
||
656 | EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); |
||
657 | |||
3746 | Serge | 658 | #ifdef CONFIG_OF |
1179 | serge | 659 | /** |
3480 | Serge | 660 | * of_get_drm_display_mode - get a drm_display_mode from devicetree |
661 | * @np: device_node with the timing specification |
||
662 | * @dmode: will be set to the return value |
||
663 | * @index: index into the list of display timings in devicetree |
||
664 | * |
||
665 | * This function is expensive and should only be used, if only one mode is to be |
||
666 | * read from DT. To get multiple modes start with of_get_display_timings and |
||
667 | * work with that instead. |
||
5060 | serge | 668 | * |
669 | * Returns: |
||
670 | * 0 on success, a negative errno code when no of videomode node was found. |
||
3480 | Serge | 671 | */ |
672 | int of_get_drm_display_mode(struct device_node *np, |
||
673 | struct drm_display_mode *dmode, int index) |
||
674 | { |
||
675 | struct videomode vm; |
||
676 | int ret; |
||
677 | |||
678 | ret = of_get_videomode(np, &vm, index); |
||
679 | if (ret) |
||
680 | return ret; |
||
681 | |||
682 | drm_display_mode_from_videomode(&vm, dmode); |
||
683 | |||
684 | pr_debug("%s: got %dx%d display mode from %s\n", |
||
685 | of_node_full_name(np), vm.hactive, vm.vactive, np->name); |
||
686 | drm_mode_debug_printmodeline(dmode); |
||
687 | |||
688 | return 0; |
||
689 | } |
||
690 | EXPORT_SYMBOL_GPL(of_get_drm_display_mode); |
||
3746 | Serge | 691 | #endif /* CONFIG_OF */ |
692 | #endif /* CONFIG_VIDEOMODE_HELPERS */ |
||
3480 | Serge | 693 | |
694 | /** |
||
1123 | serge | 695 | * drm_mode_set_name - set the name on a mode |
696 | * @mode: name will be set in this mode |
||
697 | * |
||
5060 | serge | 698 | * Set the name of @mode to a standard format which is |
699 | * with an optional 'i' suffix for interlaced modes. |
||
1123 | serge | 700 | */ |
701 | void drm_mode_set_name(struct drm_display_mode *mode) |
||
702 | { |
||
1963 | serge | 703 | bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); |
704 | |||
705 | snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", |
||
706 | mode->hdisplay, mode->vdisplay, |
||
707 | interlaced ? "i" : ""); |
||
1123 | serge | 708 | } |
709 | EXPORT_SYMBOL(drm_mode_set_name); |
||
710 | |||
6937 | serge | 711 | /** |
712 | * drm_mode_hsync - get the hsync of a mode |
||
1321 | serge | 713 | * @mode: mode |
714 | * |
||
5060 | serge | 715 | * Returns: |
716 | * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the |
||
717 | * value first if it is not yet set. |
||
1321 | serge | 718 | */ |
1963 | serge | 719 | int drm_mode_hsync(const struct drm_display_mode *mode) |
1321 | serge | 720 | { |
721 | unsigned int calc_val; |
||
722 | |||
723 | if (mode->hsync) |
||
724 | return mode->hsync; |
||
725 | |||
726 | if (mode->htotal < 0) |
||
727 | return 0; |
||
728 | |||
729 | calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ |
||
730 | calc_val += 500; /* round to 1000Hz */ |
||
731 | calc_val /= 1000; /* truncate to kHz */ |
||
732 | |||
733 | return calc_val; |
||
734 | } |
||
735 | EXPORT_SYMBOL(drm_mode_hsync); |
||
736 | |||
1123 | serge | 737 | /** |
738 | * drm_mode_vrefresh - get the vrefresh of a mode |
||
739 | * @mode: mode |
||
740 | * |
||
5060 | serge | 741 | * Returns: |
742 | * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the |
||
743 | * value first if it is not yet set. |
||
1123 | serge | 744 | */ |
1963 | serge | 745 | int drm_mode_vrefresh(const struct drm_display_mode *mode) |
1123 | serge | 746 | { |
747 | int refresh = 0; |
||
748 | unsigned int calc_val; |
||
749 | |||
750 | if (mode->vrefresh > 0) |
||
751 | refresh = mode->vrefresh; |
||
752 | else if (mode->htotal > 0 && mode->vtotal > 0) { |
||
1179 | serge | 753 | int vtotal; |
754 | vtotal = mode->vtotal; |
||
1123 | serge | 755 | /* work out vrefresh the value will be x1000 */ |
756 | calc_val = (mode->clock * 1000); |
||
757 | calc_val /= mode->htotal; |
||
1179 | serge | 758 | refresh = (calc_val + vtotal / 2) / vtotal; |
1123 | serge | 759 | |
760 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
||
761 | refresh *= 2; |
||
762 | if (mode->flags & DRM_MODE_FLAG_DBLSCAN) |
||
763 | refresh /= 2; |
||
764 | if (mode->vscan > 1) |
||
765 | refresh /= mode->vscan; |
||
766 | } |
||
767 | return refresh; |
||
768 | } |
||
769 | EXPORT_SYMBOL(drm_mode_vrefresh); |
||
770 | |||
771 | /** |
||
5060 | serge | 772 | * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters |
1123 | serge | 773 | * @p: mode |
4560 | Serge | 774 | * @adjust_flags: a combination of adjustment flags |
1123 | serge | 775 | * |
5060 | serge | 776 | * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. |
1123 | serge | 777 | * |
4560 | Serge | 778 | * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of |
779 | * interlaced modes. |
||
780 | * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for |
||
781 | * buffers containing two eyes (only adjust the timings when needed, eg. for |
||
782 | * "frame packing" or "side by side full"). |
||
6084 | serge | 783 | * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* |
784 | * be performed for doublescan and vscan > 1 modes respectively. |
||
1123 | serge | 785 | */ |
786 | void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) |
||
787 | { |
||
788 | if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) |
||
789 | return; |
||
790 | |||
4560 | Serge | 791 | p->crtc_clock = p->clock; |
1123 | serge | 792 | p->crtc_hdisplay = p->hdisplay; |
793 | p->crtc_hsync_start = p->hsync_start; |
||
794 | p->crtc_hsync_end = p->hsync_end; |
||
795 | p->crtc_htotal = p->htotal; |
||
796 | p->crtc_hskew = p->hskew; |
||
797 | p->crtc_vdisplay = p->vdisplay; |
||
798 | p->crtc_vsync_start = p->vsync_start; |
||
799 | p->crtc_vsync_end = p->vsync_end; |
||
800 | p->crtc_vtotal = p->vtotal; |
||
801 | |||
802 | if (p->flags & DRM_MODE_FLAG_INTERLACE) { |
||
803 | if (adjust_flags & CRTC_INTERLACE_HALVE_V) { |
||
804 | p->crtc_vdisplay /= 2; |
||
805 | p->crtc_vsync_start /= 2; |
||
806 | p->crtc_vsync_end /= 2; |
||
807 | p->crtc_vtotal /= 2; |
||
808 | } |
||
809 | } |
||
810 | |||
6084 | serge | 811 | if (!(adjust_flags & CRTC_NO_DBLSCAN)) { |
812 | if (p->flags & DRM_MODE_FLAG_DBLSCAN) { |
||
813 | p->crtc_vdisplay *= 2; |
||
814 | p->crtc_vsync_start *= 2; |
||
815 | p->crtc_vsync_end *= 2; |
||
816 | p->crtc_vtotal *= 2; |
||
817 | } |
||
1123 | serge | 818 | } |
819 | |||
6084 | serge | 820 | if (!(adjust_flags & CRTC_NO_VSCAN)) { |
821 | if (p->vscan > 1) { |
||
822 | p->crtc_vdisplay *= p->vscan; |
||
823 | p->crtc_vsync_start *= p->vscan; |
||
824 | p->crtc_vsync_end *= p->vscan; |
||
825 | p->crtc_vtotal *= p->vscan; |
||
826 | } |
||
1123 | serge | 827 | } |
828 | |||
4560 | Serge | 829 | if (adjust_flags & CRTC_STEREO_DOUBLE) { |
830 | unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; |
||
831 | |||
832 | switch (layout) { |
||
833 | case DRM_MODE_FLAG_3D_FRAME_PACKING: |
||
834 | p->crtc_clock *= 2; |
||
835 | p->crtc_vdisplay += p->crtc_vtotal; |
||
836 | p->crtc_vsync_start += p->crtc_vtotal; |
||
837 | p->crtc_vsync_end += p->crtc_vtotal; |
||
838 | p->crtc_vtotal += p->crtc_vtotal; |
||
839 | break; |
||
840 | } |
||
841 | } |
||
842 | |||
1123 | serge | 843 | p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); |
844 | p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); |
||
845 | p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); |
||
846 | p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); |
||
847 | } |
||
848 | EXPORT_SYMBOL(drm_mode_set_crtcinfo); |
||
849 | |||
850 | /** |
||
3031 | serge | 851 | * drm_mode_copy - copy the mode |
852 | * @dst: mode to overwrite |
||
853 | * @src: mode to copy |
||
854 | * |
||
4075 | Serge | 855 | * Copy an existing mode into another mode, preserving the object id and |
856 | * list head of the destination mode. |
||
3031 | serge | 857 | */ |
858 | void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) |
||
859 | { |
||
860 | int id = dst->base.id; |
||
4075 | Serge | 861 | struct list_head head = dst->head; |
3031 | serge | 862 | |
863 | *dst = *src; |
||
864 | dst->base.id = id; |
||
4075 | Serge | 865 | dst->head = head; |
3031 | serge | 866 | } |
867 | EXPORT_SYMBOL(drm_mode_copy); |
||
868 | |||
869 | /** |
||
1123 | serge | 870 | * drm_mode_duplicate - allocate and duplicate an existing mode |
5060 | serge | 871 | * @dev: drm_device to allocate the duplicated mode for |
872 | * @mode: mode to duplicate |
||
1123 | serge | 873 | * |
874 | * Just allocate a new mode, copy the existing mode into it, and return |
||
875 | * a pointer to it. Used to create new instances of established modes. |
||
5060 | serge | 876 | * |
877 | * Returns: |
||
878 | * Pointer to duplicated mode on success, NULL on error. |
||
1123 | serge | 879 | */ |
880 | struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, |
||
1963 | serge | 881 | const struct drm_display_mode *mode) |
1123 | serge | 882 | { |
883 | struct drm_display_mode *nmode; |
||
884 | |||
885 | nmode = drm_mode_create(dev); |
||
886 | if (!nmode) |
||
887 | return NULL; |
||
888 | |||
3031 | serge | 889 | drm_mode_copy(nmode, mode); |
890 | |||
1123 | serge | 891 | return nmode; |
892 | } |
||
893 | EXPORT_SYMBOL(drm_mode_duplicate); |
||
894 | |||
895 | /** |
||
896 | * drm_mode_equal - test modes for equality |
||
897 | * @mode1: first mode |
||
898 | * @mode2: second mode |
||
899 | * |
||
900 | * Check to see if @mode1 and @mode2 are equivalent. |
||
901 | * |
||
5060 | serge | 902 | * Returns: |
1123 | serge | 903 | * True if the modes are equal, false otherwise. |
904 | */ |
||
3192 | Serge | 905 | bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) |
1123 | serge | 906 | { |
6084 | serge | 907 | if (!mode1 && !mode2) |
908 | return true; |
||
909 | |||
910 | if (!mode1 || !mode2) |
||
911 | return false; |
||
912 | |||
1123 | serge | 913 | /* do clock check convert to PICOS so fb modes get matched |
914 | * the same */ |
||
915 | if (mode1->clock && mode2->clock) { |
||
916 | if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) |
||
917 | return false; |
||
918 | } else if (mode1->clock != mode2->clock) |
||
919 | return false; |
||
920 | |||
6937 | serge | 921 | return drm_mode_equal_no_clocks(mode1, mode2); |
922 | } |
||
923 | EXPORT_SYMBOL(drm_mode_equal); |
||
924 | |||
925 | /** |
||
926 | * drm_mode_equal_no_clocks - test modes for equality |
||
927 | * @mode1: first mode |
||
928 | * @mode2: second mode |
||
929 | * |
||
930 | * Check to see if @mode1 and @mode2 are equivalent, but |
||
931 | * don't check the pixel clocks. |
||
932 | * |
||
933 | * Returns: |
||
934 | * True if the modes are equal, false otherwise. |
||
935 | */ |
||
936 | bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) |
||
937 | { |
||
4560 | Serge | 938 | if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != |
939 | (mode2->flags & DRM_MODE_FLAG_3D_MASK)) |
||
940 | return false; |
||
941 | |||
942 | return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); |
||
3746 | Serge | 943 | } |
6937 | serge | 944 | EXPORT_SYMBOL(drm_mode_equal_no_clocks); |
3746 | Serge | 945 | |
946 | /** |
||
4560 | Serge | 947 | * drm_mode_equal_no_clocks_no_stereo - test modes for equality |
3746 | Serge | 948 | * @mode1: first mode |
949 | * @mode2: second mode |
||
950 | * |
||
951 | * Check to see if @mode1 and @mode2 are equivalent, but |
||
4560 | Serge | 952 | * don't check the pixel clocks nor the stereo layout. |
3746 | Serge | 953 | * |
5060 | serge | 954 | * Returns: |
3746 | Serge | 955 | * True if the modes are equal, false otherwise. |
956 | */ |
||
4560 | Serge | 957 | bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, |
958 | const struct drm_display_mode *mode2) |
||
3746 | Serge | 959 | { |
1123 | serge | 960 | if (mode1->hdisplay == mode2->hdisplay && |
961 | mode1->hsync_start == mode2->hsync_start && |
||
962 | mode1->hsync_end == mode2->hsync_end && |
||
963 | mode1->htotal == mode2->htotal && |
||
964 | mode1->hskew == mode2->hskew && |
||
965 | mode1->vdisplay == mode2->vdisplay && |
||
966 | mode1->vsync_start == mode2->vsync_start && |
||
967 | mode1->vsync_end == mode2->vsync_end && |
||
968 | mode1->vtotal == mode2->vtotal && |
||
969 | mode1->vscan == mode2->vscan && |
||
4560 | Serge | 970 | (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == |
971 | (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) |
||
1123 | serge | 972 | return true; |
973 | |||
974 | return false; |
||
975 | } |
||
4560 | Serge | 976 | EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); |
1123 | serge | 977 | |
978 | /** |
||
6084 | serge | 979 | * drm_mode_validate_basic - make sure the mode is somewhat sane |
980 | * @mode: mode to check |
||
981 | * |
||
982 | * Check that the mode timings are at least somewhat reasonable. |
||
983 | * Any hardware specific limits are left up for each driver to check. |
||
984 | * |
||
985 | * Returns: |
||
986 | * The mode status |
||
987 | */ |
||
988 | enum drm_mode_status |
||
989 | drm_mode_validate_basic(const struct drm_display_mode *mode) |
||
990 | { |
||
991 | if (mode->clock == 0) |
||
992 | return MODE_CLOCK_LOW; |
||
993 | |||
994 | if (mode->hdisplay == 0 || |
||
995 | mode->hsync_start < mode->hdisplay || |
||
996 | mode->hsync_end < mode->hsync_start || |
||
997 | mode->htotal < mode->hsync_end) |
||
998 | return MODE_H_ILLEGAL; |
||
999 | |||
1000 | if (mode->vdisplay == 0 || |
||
1001 | mode->vsync_start < mode->vdisplay || |
||
1002 | mode->vsync_end < mode->vsync_start || |
||
1003 | mode->vtotal < mode->vsync_end) |
||
1004 | return MODE_V_ILLEGAL; |
||
1005 | |||
1006 | return MODE_OK; |
||
1007 | } |
||
1008 | EXPORT_SYMBOL(drm_mode_validate_basic); |
||
1009 | |||
1010 | /** |
||
1123 | serge | 1011 | * drm_mode_validate_size - make sure modes adhere to size constraints |
6084 | serge | 1012 | * @mode: mode to check |
1123 | serge | 1013 | * @maxX: maximum width |
1014 | * @maxY: maximum height |
||
1015 | * |
||
5060 | serge | 1016 | * This function is a helper which can be used to validate modes against size |
1017 | * limitations of the DRM device/connector. If a mode is too big its status |
||
5271 | serge | 1018 | * member is updated with the appropriate validation failure code. The list |
5060 | serge | 1019 | * itself is not changed. |
6084 | serge | 1020 | * |
1021 | * Returns: |
||
1022 | * The mode status |
||
1123 | serge | 1023 | */ |
6084 | serge | 1024 | enum drm_mode_status |
1025 | drm_mode_validate_size(const struct drm_display_mode *mode, |
||
1026 | int maxX, int maxY) |
||
1123 | serge | 1027 | { |
6084 | serge | 1028 | if (maxX > 0 && mode->hdisplay > maxX) |
1029 | return MODE_VIRTUAL_X; |
||
1123 | serge | 1030 | |
6084 | serge | 1031 | if (maxY > 0 && mode->vdisplay > maxY) |
1032 | return MODE_VIRTUAL_Y; |
||
1123 | serge | 1033 | |
6084 | serge | 1034 | return MODE_OK; |
1123 | serge | 1035 | } |
1036 | EXPORT_SYMBOL(drm_mode_validate_size); |
||
1037 | |||
6084 | serge | 1038 | #define MODE_STATUS(status) [MODE_ ## status + 3] = #status |
1039 | |||
1040 | static const char * const drm_mode_status_names[] = { |
||
1041 | MODE_STATUS(OK), |
||
1042 | MODE_STATUS(HSYNC), |
||
1043 | MODE_STATUS(VSYNC), |
||
1044 | MODE_STATUS(H_ILLEGAL), |
||
1045 | MODE_STATUS(V_ILLEGAL), |
||
1046 | MODE_STATUS(BAD_WIDTH), |
||
1047 | MODE_STATUS(NOMODE), |
||
1048 | MODE_STATUS(NO_INTERLACE), |
||
1049 | MODE_STATUS(NO_DBLESCAN), |
||
1050 | MODE_STATUS(NO_VSCAN), |
||
1051 | MODE_STATUS(MEM), |
||
1052 | MODE_STATUS(VIRTUAL_X), |
||
1053 | MODE_STATUS(VIRTUAL_Y), |
||
1054 | MODE_STATUS(MEM_VIRT), |
||
1055 | MODE_STATUS(NOCLOCK), |
||
1056 | MODE_STATUS(CLOCK_HIGH), |
||
1057 | MODE_STATUS(CLOCK_LOW), |
||
1058 | MODE_STATUS(CLOCK_RANGE), |
||
1059 | MODE_STATUS(BAD_HVALUE), |
||
1060 | MODE_STATUS(BAD_VVALUE), |
||
1061 | MODE_STATUS(BAD_VSCAN), |
||
1062 | MODE_STATUS(HSYNC_NARROW), |
||
1063 | MODE_STATUS(HSYNC_WIDE), |
||
1064 | MODE_STATUS(HBLANK_NARROW), |
||
1065 | MODE_STATUS(HBLANK_WIDE), |
||
1066 | MODE_STATUS(VSYNC_NARROW), |
||
1067 | MODE_STATUS(VSYNC_WIDE), |
||
1068 | MODE_STATUS(VBLANK_NARROW), |
||
1069 | MODE_STATUS(VBLANK_WIDE), |
||
1070 | MODE_STATUS(PANEL), |
||
1071 | MODE_STATUS(INTERLACE_WIDTH), |
||
1072 | MODE_STATUS(ONE_WIDTH), |
||
1073 | MODE_STATUS(ONE_HEIGHT), |
||
1074 | MODE_STATUS(ONE_SIZE), |
||
1075 | MODE_STATUS(NO_REDUCED), |
||
1076 | MODE_STATUS(NO_STEREO), |
||
6937 | serge | 1077 | MODE_STATUS(STALE), |
6084 | serge | 1078 | MODE_STATUS(BAD), |
1079 | MODE_STATUS(ERROR), |
||
1080 | }; |
||
1081 | |||
1082 | #undef MODE_STATUS |
||
1083 | |||
1084 | static const char *drm_get_mode_status_name(enum drm_mode_status status) |
||
1085 | { |
||
1086 | int index = status + 3; |
||
1087 | |||
1088 | if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) |
||
1089 | return ""; |
||
1090 | |||
1091 | return drm_mode_status_names[index]; |
||
1092 | } |
||
1093 | |||
1123 | serge | 1094 | /** |
1095 | * drm_mode_prune_invalid - remove invalid modes from mode list |
||
1096 | * @dev: DRM device |
||
1097 | * @mode_list: list of modes to check |
||
1098 | * @verbose: be verbose about it |
||
1099 | * |
||
5060 | serge | 1100 | * This helper function can be used to prune a display mode list after |
1101 | * validation has been completed. All modes who's status is not MODE_OK will be |
||
1102 | * removed from the list, and if @verbose the status code and mode name is also |
||
1103 | * printed to dmesg. |
||
1123 | serge | 1104 | */ |
1105 | void drm_mode_prune_invalid(struct drm_device *dev, |
||
1106 | struct list_head *mode_list, bool verbose) |
||
1107 | { |
||
1108 | struct drm_display_mode *mode, *t; |
||
1109 | |||
1110 | list_for_each_entry_safe(mode, t, mode_list, head) { |
||
1111 | if (mode->status != MODE_OK) { |
||
1112 | list_del(&mode->head); |
||
1113 | if (verbose) { |
||
1114 | drm_mode_debug_printmodeline(mode); |
||
6084 | serge | 1115 | DRM_DEBUG_KMS("Not using %s mode: %s\n", |
1116 | mode->name, |
||
1117 | drm_get_mode_status_name(mode->status)); |
||
1123 | serge | 1118 | } |
1119 | drm_mode_destroy(dev, mode); |
||
1120 | } |
||
1121 | } |
||
1122 | } |
||
1123 | EXPORT_SYMBOL(drm_mode_prune_invalid); |
||
1124 | |||
1125 | /** |
||
1126 | * drm_mode_compare - compare modes for favorability |
||
1404 | serge | 1127 | * @priv: unused |
1123 | serge | 1128 | * @lh_a: list_head for first mode |
1129 | * @lh_b: list_head for second mode |
||
1130 | * |
||
1131 | * Compare two modes, given by @lh_a and @lh_b, returning a value indicating |
||
1132 | * which is better. |
||
1133 | * |
||
5060 | serge | 1134 | * Returns: |
1123 | serge | 1135 | * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or |
1136 | * positive if @lh_b is better than @lh_a. |
||
1137 | */ |
||
1404 | serge | 1138 | static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) |
1123 | serge | 1139 | { |
1140 | struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); |
||
1141 | struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); |
||
1142 | int diff; |
||
1143 | |||
1144 | diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - |
||
1145 | ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); |
||
1146 | if (diff) |
||
1147 | return diff; |
||
1148 | diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; |
||
1149 | if (diff) |
||
1150 | return diff; |
||
4075 | Serge | 1151 | |
1152 | diff = b->vrefresh - a->vrefresh; |
||
1153 | if (diff) |
||
1154 | return diff; |
||
1155 | |||
1123 | serge | 1156 | diff = b->clock - a->clock; |
1157 | return diff; |
||
1158 | } |
||
1159 | |||
1160 | /** |
||
1161 | * drm_mode_sort - sort mode list |
||
5060 | serge | 1162 | * @mode_list: list of drm_display_mode structures to sort |
1123 | serge | 1163 | * |
5060 | serge | 1164 | * Sort @mode_list by favorability, moving good modes to the head of the list. |
1123 | serge | 1165 | */ |
1166 | void drm_mode_sort(struct list_head *mode_list) |
||
1167 | { |
||
1404 | serge | 1168 | list_sort(NULL, mode_list, drm_mode_compare); |
1123 | serge | 1169 | } |
1170 | EXPORT_SYMBOL(drm_mode_sort); |
||
1171 | |||
1172 | /** |
||
1173 | * drm_mode_connector_list_update - update the mode list for the connector |
||
1174 | * @connector: the connector to update |
||
1175 | * |
||
1176 | * This moves the modes from the @connector probed_modes list |
||
1177 | * to the actual mode list. It compares the probed mode against the current |
||
5060 | serge | 1178 | * list and only adds different/new modes. |
1179 | * |
||
1180 | * This is just a helper functions doesn't validate any modes itself and also |
||
1181 | * doesn't prune any invalid modes. Callers need to do that themselves. |
||
1123 | serge | 1182 | */ |
6937 | serge | 1183 | void drm_mode_connector_list_update(struct drm_connector *connector) |
1123 | serge | 1184 | { |
1185 | struct drm_display_mode *pmode, *pt; |
||
1186 | |||
5060 | serge | 1187 | WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); |
1188 | |||
6937 | serge | 1189 | list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { |
1190 | struct drm_display_mode *mode; |
||
1191 | bool found_it = false; |
||
1192 | |||
1123 | serge | 1193 | /* go through current modes checking for the new probed mode */ |
1194 | list_for_each_entry(mode, &connector->modes, head) { |
||
6937 | serge | 1195 | if (!drm_mode_equal(pmode, mode)) |
1196 | continue; |
||
1197 | |||
1198 | found_it = true; |
||
1199 | |||
1200 | /* |
||
1201 | * If the old matching mode is stale (ie. left over |
||
1202 | * from a previous probe) just replace it outright. |
||
1203 | * Otherwise just merge the type bits between all |
||
1204 | * equal probed modes. |
||
1205 | * |
||
1206 | * If two probed modes are considered equal, pick the |
||
1207 | * actual timings from the one that's marked as |
||
1208 | * preferred (in case the match isn't 100%). If |
||
1209 | * multiple or zero preferred modes are present, favor |
||
1210 | * the mode added to the probed_modes list first. |
||
1211 | */ |
||
1212 | if (mode->status == MODE_STALE) { |
||
1213 | drm_mode_copy(mode, pmode); |
||
1214 | } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && |
||
1215 | (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { |
||
1216 | pmode->type |= mode->type; |
||
1217 | drm_mode_copy(mode, pmode); |
||
1218 | } else { |
||
7144 | serge | 1219 | mode->type |= pmode->type; |
6937 | serge | 1220 | } |
1221 | |||
7144 | serge | 1222 | list_del(&pmode->head); |
1223 | drm_mode_destroy(connector->dev, pmode); |
||
1224 | break; |
||
1225 | } |
||
1123 | serge | 1226 | |
1227 | if (!found_it) { |
||
1228 | list_move_tail(&pmode->head, &connector->modes); |
||
1229 | } |
||
1230 | } |
||
1231 | } |
||
1232 | EXPORT_SYMBOL(drm_mode_connector_list_update); |
||
6088 | serge | 1233 | |
6084 | serge | 1234 | /** |
6088 | serge | 1235 | * drm_mode_parse_command_line_for_connector - parse command line modeline for connector |
1236 | * @mode_option: optional per connector mode option |
||
1237 | * @connector: connector to parse modeline for |
||
1238 | * @mode: preallocated drm_cmdline_mode structure to fill out |
||
1239 | * |
||
1240 | * This parses @mode_option command line modeline for modes and options to |
||
1241 | * configure the connector. If @mode_option is NULL the default command line |
||
1242 | * modeline in fb_mode_option will be parsed instead. |
||
1243 | * |
||
1244 | * This uses the same parameters as the fb modedb.c, except for an extra |
||
1245 | * force-enable, force-enable-digital and force-disable bit at the end: |
||
1246 | * |
||
7144 | serge | 1247 | * |
6088 | serge | 1248 | * |
1249 | * The intermediate drm_cmdline_mode structure is required to store additional |
||
1250 | * options from the command line modline like the force-enable/disable flag. |
||
1251 | * |
||
1252 | * Returns: |
||
1253 | * True if a valid modeline has been parsed, false otherwise. |
||
1254 | */ |
||
1255 | bool drm_mode_parse_command_line_for_connector(const char *mode_option, |
||
1256 | struct drm_connector *connector, |
||
1257 | struct drm_cmdline_mode *mode) |
||
1258 | { |
||
1259 | const char *name; |
||
1260 | unsigned int namelen; |
||
1261 | bool res_specified = false, bpp_specified = false, refresh_specified = false; |
||
1262 | unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; |
||
1263 | bool yres_specified = false, cvt = false, rb = false; |
||
1264 | bool interlace = false, margins = false, was_digit = false; |
||
1265 | int i; |
||
1266 | enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; |
||
1267 | |||
1268 | #ifdef CONFIG_FB |
||
1269 | if (!mode_option) |
||
1270 | mode_option = fb_mode_option; |
||
1271 | #endif |
||
1272 | |||
1273 | if (!mode_option) { |
||
1274 | mode->specified = false; |
||
1275 | return false; |
||
1276 | } |
||
1277 | |||
1278 | name = mode_option; |
||
1279 | namelen = strlen(name); |
||
1280 | for (i = namelen-1; i >= 0; i--) { |
||
1281 | switch (name[i]) { |
||
1282 | case '@': |
||
1283 | if (!refresh_specified && !bpp_specified && |
||
1284 | !yres_specified && !cvt && !rb && was_digit) { |
||
1285 | refresh = simple_strtol(&name[i+1], NULL, 10); |
||
1286 | refresh_specified = true; |
||
1287 | was_digit = false; |
||
1288 | } else |
||
1289 | goto done; |
||
1290 | break; |
||
1291 | case '-': |
||
1292 | if (!bpp_specified && !yres_specified && !cvt && |
||
1293 | !rb && was_digit) { |
||
1294 | bpp = simple_strtol(&name[i+1], NULL, 10); |
||
1295 | bpp_specified = true; |
||
1296 | was_digit = false; |
||
1297 | } else |
||
1298 | goto done; |
||
1299 | break; |
||
1300 | case 'x': |
||
1301 | if (!yres_specified && was_digit) { |
||
1302 | yres = simple_strtol(&name[i+1], NULL, 10); |
||
1303 | yres_specified = true; |
||
1304 | was_digit = false; |
||
1305 | } else |
||
1306 | goto done; |
||
1307 | break; |
||
1308 | case '0' ... '9': |
||
1309 | was_digit = true; |
||
1310 | break; |
||
1311 | case 'M': |
||
1312 | if (yres_specified || cvt || was_digit) |
||
1313 | goto done; |
||
1314 | cvt = true; |
||
1315 | break; |
||
1316 | case 'R': |
||
1317 | if (yres_specified || cvt || rb || was_digit) |
||
1318 | goto done; |
||
1319 | rb = true; |
||
1320 | break; |
||
1321 | case 'm': |
||
1322 | if (cvt || yres_specified || was_digit) |
||
1323 | goto done; |
||
1324 | margins = true; |
||
1325 | break; |
||
1326 | case 'i': |
||
1327 | if (cvt || yres_specified || was_digit) |
||
1328 | goto done; |
||
1329 | interlace = true; |
||
1330 | break; |
||
1331 | case 'e': |
||
1332 | if (yres_specified || bpp_specified || refresh_specified || |
||
1333 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
||
1334 | goto done; |
||
1335 | |||
1336 | force = DRM_FORCE_ON; |
||
1337 | break; |
||
1338 | case 'D': |
||
1339 | if (yres_specified || bpp_specified || refresh_specified || |
||
1340 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
||
1341 | goto done; |
||
1342 | |||
1343 | if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && |
||
1344 | (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) |
||
1345 | force = DRM_FORCE_ON; |
||
1346 | else |
||
1347 | force = DRM_FORCE_ON_DIGITAL; |
||
1348 | break; |
||
1349 | case 'd': |
||
1350 | if (yres_specified || bpp_specified || refresh_specified || |
||
1351 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
||
1352 | goto done; |
||
1353 | |||
1354 | force = DRM_FORCE_OFF; |
||
1355 | break; |
||
1356 | default: |
||
1357 | goto done; |
||
1358 | } |
||
1359 | } |
||
1360 | |||
1361 | if (i < 0 && yres_specified) { |
||
1362 | char *ch; |
||
1363 | xres = simple_strtol(name, &ch, 10); |
||
1364 | if ((ch != NULL) && (*ch == 'x')) |
||
1365 | res_specified = true; |
||
1366 | else |
||
1367 | i = ch - name; |
||
1368 | } else if (!yres_specified && was_digit) { |
||
1369 | /* catch mode that begins with digits but has no 'x' */ |
||
1370 | i = 0; |
||
1371 | } |
||
1372 | done: |
||
1373 | if (i >= 0) { |
||
7144 | serge | 1374 | pr_warn("[drm] parse error at position %i in video mode '%s'\n", |
6088 | serge | 1375 | i, name); |
1376 | mode->specified = false; |
||
1377 | return false; |
||
1378 | } |
||
1379 | |||
1380 | if (res_specified) { |
||
1381 | mode->specified = true; |
||
1382 | mode->xres = xres; |
||
1383 | mode->yres = yres; |
||
1384 | } |
||
1385 | |||
1386 | if (refresh_specified) { |
||
1387 | mode->refresh_specified = true; |
||
1388 | mode->refresh = refresh; |
||
1389 | } |
||
1390 | |||
1391 | if (bpp_specified) { |
||
1392 | mode->bpp_specified = true; |
||
1393 | mode->bpp = bpp; |
||
1394 | } |
||
1395 | mode->rb = rb; |
||
1396 | mode->cvt = cvt; |
||
1397 | mode->interlace = interlace; |
||
1398 | mode->margins = margins; |
||
1399 | mode->force = force; |
||
1400 | |||
1401 | return true; |
||
1402 | } |
||
1403 | EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); |
||
1404 | |||
1405 | /** |
||
1406 | * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode |
||
1407 | * @dev: DRM device to create the new mode for |
||
1408 | * @cmd: input command line modeline |
||
1409 | * |
||
1410 | * Returns: |
||
1411 | * Pointer to converted mode on success, NULL on error. |
||
1412 | */ |
||
1413 | struct drm_display_mode * |
||
1414 | drm_mode_create_from_cmdline_mode(struct drm_device *dev, |
||
1415 | struct drm_cmdline_mode *cmd) |
||
1416 | { |
||
1417 | struct drm_display_mode *mode; |
||
1418 | |||
1419 | if (cmd->cvt) |
||
1420 | mode = drm_cvt_mode(dev, |
||
1421 | cmd->xres, cmd->yres, |
||
1422 | cmd->refresh_specified ? cmd->refresh : 60, |
||
1423 | cmd->rb, cmd->interlace, |
||
1424 | cmd->margins); |
||
1425 | else |
||
1426 | mode = drm_gtf_mode(dev, |
||
1427 | cmd->xres, cmd->yres, |
||
1428 | cmd->refresh_specified ? cmd->refresh : 60, |
||
1429 | cmd->interlace, |
||
1430 | cmd->margins); |
||
1431 | if (!mode) |
||
1432 | return NULL; |
||
1433 | |||
1434 | mode->type |= DRM_MODE_TYPE_USERDEF; |
||
1435 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
||
1436 | return mode; |
||
1437 | } |
||
1438 | EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); |
||
1439 | |||
1440 | /** |
||
6084 | serge | 1441 | * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo |
1442 | * @out: drm_mode_modeinfo struct to return to the user |
||
1443 | * @in: drm_display_mode to use |
||
1444 | * |
||
1445 | * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to |
||
1446 | * the user. |
||
1447 | */ |
||
1448 | void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, |
||
1449 | const struct drm_display_mode *in) |
||
1450 | { |
||
1451 | WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || |
||
1452 | in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || |
||
1453 | in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || |
||
1454 | in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || |
||
1455 | in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, |
||
1456 | "timing values too large for mode info\n"); |
||
1457 | |||
1458 | out->clock = in->clock; |
||
1459 | out->hdisplay = in->hdisplay; |
||
1460 | out->hsync_start = in->hsync_start; |
||
1461 | out->hsync_end = in->hsync_end; |
||
1462 | out->htotal = in->htotal; |
||
1463 | out->hskew = in->hskew; |
||
1464 | out->vdisplay = in->vdisplay; |
||
1465 | out->vsync_start = in->vsync_start; |
||
1466 | out->vsync_end = in->vsync_end; |
||
1467 | out->vtotal = in->vtotal; |
||
1468 | out->vscan = in->vscan; |
||
1469 | out->vrefresh = in->vrefresh; |
||
1470 | out->flags = in->flags; |
||
1471 | out->type = in->type; |
||
1472 | strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); |
||
1473 | out->name[DRM_DISPLAY_MODE_LEN-1] = 0; |
||
1474 | } |
||
1475 | |||
1476 | /** |
||
1477 | * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode |
||
1478 | * @out: drm_display_mode to return to the user |
||
1479 | * @in: drm_mode_modeinfo to use |
||
1480 | * |
||
1481 | * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to |
||
1482 | * the caller. |
||
1483 | * |
||
1484 | * Returns: |
||
1485 | * Zero on success, negative errno on failure. |
||
1486 | */ |
||
1487 | int drm_mode_convert_umode(struct drm_display_mode *out, |
||
1488 | const struct drm_mode_modeinfo *in) |
||
1489 | { |
||
1490 | int ret = -EINVAL; |
||
1491 | |||
1492 | if (in->clock > INT_MAX || in->vrefresh > INT_MAX) { |
||
1493 | ret = -ERANGE; |
||
1494 | goto out; |
||
1495 | } |
||
1496 | |||
1497 | if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) |
||
1498 | goto out; |
||
1499 | |||
1500 | out->clock = in->clock; |
||
1501 | out->hdisplay = in->hdisplay; |
||
1502 | out->hsync_start = in->hsync_start; |
||
1503 | out->hsync_end = in->hsync_end; |
||
1504 | out->htotal = in->htotal; |
||
1505 | out->hskew = in->hskew; |
||
1506 | out->vdisplay = in->vdisplay; |
||
1507 | out->vsync_start = in->vsync_start; |
||
1508 | out->vsync_end = in->vsync_end; |
||
1509 | out->vtotal = in->vtotal; |
||
1510 | out->vscan = in->vscan; |
||
1511 | out->vrefresh = in->vrefresh; |
||
1512 | out->flags = in->flags; |
||
1513 | out->type = in->type; |
||
1514 | strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); |
||
1515 | out->name[DRM_DISPLAY_MODE_LEN-1] = 0; |
||
1516 | |||
1517 | out->status = drm_mode_validate_basic(out); |
||
1518 | if (out->status != MODE_OK) |
||
1519 | goto out; |
||
1520 | |||
7144 | serge | 1521 | drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); |
1522 | |||
6084 | serge | 1523 | ret = 0; |
1524 | |||
1525 | out: |
||
1526 | return ret; |
||
6937 | serge | 1527 | }>>>>>>>>>>>> |