Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1 | /* |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 2 | * Copyright © 1997-2003 by The XFree86 Project, Inc. |
| 3 | * Copyright © 2007 Dave Airlie |
| 4 | * Copyright © 2007-2008 Intel Corporation |
| 5 | * Jesse Barnes <jesse.barnes@intel.com> |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 6 | * Copyright 2005-2006 Luc Verhaegen |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 7 | * Copyright (c) 2001, Andy Ritger aritger@nvidia.com |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 8 | * |
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 10 | * copy of this software and associated documentation files (the "Software"), |
| 11 | * to deal in the Software without restriction, including without limitation |
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
| 14 | * Software is furnished to do so, subject to the following conditions: |
| 15 | * |
| 16 | * The above copyright notice and this permission notice shall be included in |
| 17 | * all copies or substantial portions of the Software. |
| 18 | * |
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 22 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 23 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 24 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 25 | * OTHER DEALINGS IN THE SOFTWARE. |
| 26 | * |
| 27 | * Except as contained in this notice, the name of the copyright holder(s) |
| 28 | * and author(s) shall not be used in advertising or otherwise to promote |
| 29 | * the sale, use or other dealings in this Software without prior written |
| 30 | * authorization from the copyright holder(s) and author(s). |
| 31 | */ |
| 32 | |
| 33 | #include <linux/list.h> |
Dave Chinner | 2c76127 | 2010-01-12 17:39:16 +1100 | [diff] [blame] | 34 | #include <linux/list_sort.h> |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 35 | #include <linux/export.h> |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 36 | #include "drmP.h" |
| 37 | #include "drm.h" |
| 38 | #include "drm_crtc.h" |
| 39 | |
| 40 | /** |
| 41 | * drm_mode_debug_printmodeline - debug print a mode |
| 42 | * @dev: DRM device |
| 43 | * @mode: mode to print |
| 44 | * |
| 45 | * LOCKING: |
| 46 | * None. |
| 47 | * |
| 48 | * Describe @mode using DRM_DEBUG. |
| 49 | */ |
| 50 | void drm_mode_debug_printmodeline(struct drm_display_mode *mode) |
| 51 | { |
Zhao Yakui | f940f37 | 2009-07-20 13:48:05 +0800 | [diff] [blame] | 52 | DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " |
Zhao Yakui | 8a4c47f | 2009-07-20 13:48:04 +0800 | [diff] [blame] | 53 | "0x%x 0x%x\n", |
yakui_zhao | f053185 | 2009-06-02 14:12:47 +0800 | [diff] [blame] | 54 | mode->base.id, mode->name, mode->vrefresh, mode->clock, |
| 55 | mode->hdisplay, mode->hsync_start, |
| 56 | mode->hsync_end, mode->htotal, |
| 57 | mode->vdisplay, mode->vsync_start, |
| 58 | mode->vsync_end, mode->vtotal, mode->type, mode->flags); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 59 | } |
| 60 | EXPORT_SYMBOL(drm_mode_debug_printmodeline); |
| 61 | |
| 62 | /** |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 63 | * drm_cvt_mode -create a modeline based on CVT algorithm |
| 64 | * @dev: DRM device |
| 65 | * @hdisplay: hdisplay size |
| 66 | * @vdisplay: vdisplay size |
| 67 | * @vrefresh : vrefresh rate |
| 68 | * @reduced : Whether the GTF calculation is simplified |
| 69 | * @interlaced:Whether the interlace is supported |
| 70 | * |
| 71 | * LOCKING: |
| 72 | * none. |
| 73 | * |
| 74 | * return the modeline based on CVT algorithm |
| 75 | * |
| 76 | * This function is called to generate the modeline based on CVT algorithm |
| 77 | * according to the hdisplay, vdisplay, vrefresh. |
| 78 | * It is based from the VESA(TM) Coordinated Video Timing Generator by |
| 79 | * Graham Loveridge April 9, 2003 available at |
Justin P. Mattock | 631dd1a | 2010-10-18 11:03:14 +0200 | [diff] [blame] | 80 | * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 81 | * |
| 82 | * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. |
| 83 | * What I have done is to translate it by using integer calculation. |
| 84 | */ |
| 85 | #define HV_FACTOR 1000 |
| 86 | struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, |
| 87 | int vdisplay, int vrefresh, |
Dave Airlie | d50ba25 | 2009-09-23 14:44:08 +1000 | [diff] [blame] | 88 | bool reduced, bool interlaced, bool margins) |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 89 | { |
| 90 | /* 1) top/bottom margin size (% of height) - default: 1.8, */ |
| 91 | #define CVT_MARGIN_PERCENTAGE 18 |
| 92 | /* 2) character cell horizontal granularity (pixels) - default 8 */ |
| 93 | #define CVT_H_GRANULARITY 8 |
| 94 | /* 3) Minimum vertical porch (lines) - default 3 */ |
| 95 | #define CVT_MIN_V_PORCH 3 |
| 96 | /* 4) Minimum number of vertical back porch lines - default 6 */ |
| 97 | #define CVT_MIN_V_BPORCH 6 |
| 98 | /* Pixel Clock step (kHz) */ |
| 99 | #define CVT_CLOCK_STEP 250 |
| 100 | struct drm_display_mode *drm_mode; |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 101 | unsigned int vfieldrate, hperiod; |
| 102 | int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; |
| 103 | int interlace; |
| 104 | |
| 105 | /* allocate the drm_display_mode structure. If failure, we will |
| 106 | * return directly |
| 107 | */ |
| 108 | drm_mode = drm_mode_create(dev); |
| 109 | if (!drm_mode) |
| 110 | return NULL; |
| 111 | |
| 112 | /* the CVT default refresh rate is 60Hz */ |
| 113 | if (!vrefresh) |
| 114 | vrefresh = 60; |
| 115 | |
| 116 | /* the required field fresh rate */ |
| 117 | if (interlaced) |
| 118 | vfieldrate = vrefresh * 2; |
| 119 | else |
| 120 | vfieldrate = vrefresh; |
| 121 | |
| 122 | /* horizontal pixels */ |
| 123 | hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); |
| 124 | |
| 125 | /* determine the left&right borders */ |
| 126 | hmargin = 0; |
| 127 | if (margins) { |
| 128 | hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; |
| 129 | hmargin -= hmargin % CVT_H_GRANULARITY; |
| 130 | } |
| 131 | /* find the total active pixels */ |
| 132 | drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; |
| 133 | |
| 134 | /* find the number of lines per field */ |
| 135 | if (interlaced) |
| 136 | vdisplay_rnd = vdisplay / 2; |
| 137 | else |
| 138 | vdisplay_rnd = vdisplay; |
| 139 | |
| 140 | /* find the top & bottom borders */ |
| 141 | vmargin = 0; |
| 142 | if (margins) |
| 143 | vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; |
| 144 | |
Francisco Jerez | 841b411 | 2009-08-12 02:30:09 +0200 | [diff] [blame] | 145 | drm_mode->vdisplay = vdisplay + 2 * vmargin; |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 146 | |
| 147 | /* Interlaced */ |
| 148 | if (interlaced) |
| 149 | interlace = 1; |
| 150 | else |
| 151 | interlace = 0; |
| 152 | |
| 153 | /* Determine VSync Width from aspect ratio */ |
| 154 | if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) |
| 155 | vsync = 4; |
| 156 | else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) |
| 157 | vsync = 5; |
| 158 | else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) |
| 159 | vsync = 6; |
| 160 | else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) |
| 161 | vsync = 7; |
| 162 | else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) |
| 163 | vsync = 7; |
| 164 | else /* custom */ |
| 165 | vsync = 10; |
| 166 | |
| 167 | if (!reduced) { |
| 168 | /* simplify the GTF calculation */ |
| 169 | /* 4) Minimum time of vertical sync + back porch interval (µs) |
| 170 | * default 550.0 |
| 171 | */ |
| 172 | int tmp1, tmp2; |
| 173 | #define CVT_MIN_VSYNC_BP 550 |
| 174 | /* 3) Nominal HSync width (% of line period) - default 8 */ |
| 175 | #define CVT_HSYNC_PERCENTAGE 8 |
| 176 | unsigned int hblank_percentage; |
| 177 | int vsyncandback_porch, vback_porch, hblank; |
| 178 | |
| 179 | /* estimated the horizontal period */ |
| 180 | tmp1 = HV_FACTOR * 1000000 - |
| 181 | CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; |
| 182 | tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + |
| 183 | interlace; |
| 184 | hperiod = tmp1 * 2 / (tmp2 * vfieldrate); |
| 185 | |
| 186 | tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; |
| 187 | /* 9. Find number of lines in sync + backporch */ |
| 188 | if (tmp1 < (vsync + CVT_MIN_V_PORCH)) |
| 189 | vsyncandback_porch = vsync + CVT_MIN_V_PORCH; |
| 190 | else |
| 191 | vsyncandback_porch = tmp1; |
| 192 | /* 10. Find number of lines in back porch */ |
| 193 | vback_porch = vsyncandback_porch - vsync; |
| 194 | drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + |
| 195 | vsyncandback_porch + CVT_MIN_V_PORCH; |
| 196 | /* 5) Definition of Horizontal blanking time limitation */ |
| 197 | /* Gradient (%/kHz) - default 600 */ |
| 198 | #define CVT_M_FACTOR 600 |
| 199 | /* Offset (%) - default 40 */ |
| 200 | #define CVT_C_FACTOR 40 |
| 201 | /* Blanking time scaling factor - default 128 */ |
| 202 | #define CVT_K_FACTOR 128 |
| 203 | /* Scaling factor weighting - default 20 */ |
| 204 | #define CVT_J_FACTOR 20 |
| 205 | #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) |
| 206 | #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ |
| 207 | CVT_J_FACTOR) |
| 208 | /* 12. Find ideal blanking duty cycle from formula */ |
| 209 | hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * |
| 210 | hperiod / 1000; |
| 211 | /* 13. Blanking time */ |
| 212 | if (hblank_percentage < 20 * HV_FACTOR) |
| 213 | hblank_percentage = 20 * HV_FACTOR; |
| 214 | hblank = drm_mode->hdisplay * hblank_percentage / |
| 215 | (100 * HV_FACTOR - hblank_percentage); |
| 216 | hblank -= hblank % (2 * CVT_H_GRANULARITY); |
| 217 | /* 14. find the total pixes per line */ |
| 218 | drm_mode->htotal = drm_mode->hdisplay + hblank; |
| 219 | drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; |
| 220 | drm_mode->hsync_start = drm_mode->hsync_end - |
| 221 | (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; |
| 222 | drm_mode->hsync_start += CVT_H_GRANULARITY - |
| 223 | drm_mode->hsync_start % CVT_H_GRANULARITY; |
| 224 | /* fill the Vsync values */ |
| 225 | drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; |
| 226 | drm_mode->vsync_end = drm_mode->vsync_start + vsync; |
| 227 | } else { |
| 228 | /* Reduced blanking */ |
| 229 | /* Minimum vertical blanking interval time (µs)- default 460 */ |
| 230 | #define CVT_RB_MIN_VBLANK 460 |
| 231 | /* Fixed number of clocks for horizontal sync */ |
| 232 | #define CVT_RB_H_SYNC 32 |
| 233 | /* Fixed number of clocks for horizontal blanking */ |
| 234 | #define CVT_RB_H_BLANK 160 |
| 235 | /* Fixed number of lines for vertical front porch - default 3*/ |
| 236 | #define CVT_RB_VFPORCH 3 |
| 237 | int vbilines; |
| 238 | int tmp1, tmp2; |
| 239 | /* 8. Estimate Horizontal period. */ |
| 240 | tmp1 = HV_FACTOR * 1000000 - |
| 241 | CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; |
| 242 | tmp2 = vdisplay_rnd + 2 * vmargin; |
| 243 | hperiod = tmp1 / (tmp2 * vfieldrate); |
| 244 | /* 9. Find number of lines in vertical blanking */ |
| 245 | vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; |
| 246 | /* 10. Check if vertical blanking is sufficient */ |
| 247 | if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) |
| 248 | vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; |
| 249 | /* 11. Find total number of lines in vertical field */ |
| 250 | drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; |
| 251 | /* 12. Find total number of pixels in a line */ |
| 252 | drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; |
| 253 | /* Fill in HSync values */ |
| 254 | drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; |
Adam Jackson | adde0f2 | 2010-08-23 10:19:14 -0400 | [diff] [blame] | 255 | drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; |
| 256 | /* Fill in VSync values */ |
| 257 | drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; |
| 258 | drm_mode->vsync_end = drm_mode->vsync_start + vsync; |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 259 | } |
| 260 | /* 15/13. Find pixel clock frequency (kHz for xf86) */ |
| 261 | drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; |
| 262 | drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; |
| 263 | /* 18/16. Find actual vertical frame frequency */ |
| 264 | /* ignore - just set the mode flag for interlaced */ |
Adam Jackson | 171fdd8 | 2010-03-29 21:43:31 +0000 | [diff] [blame] | 265 | if (interlaced) { |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 266 | drm_mode->vtotal *= 2; |
Adam Jackson | 171fdd8 | 2010-03-29 21:43:31 +0000 | [diff] [blame] | 267 | drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
| 268 | } |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 269 | /* Fill the mode line name */ |
| 270 | drm_mode_set_name(drm_mode); |
| 271 | if (reduced) |
| 272 | drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | |
| 273 | DRM_MODE_FLAG_NVSYNC); |
| 274 | else |
| 275 | drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | |
| 276 | DRM_MODE_FLAG_NHSYNC); |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 277 | |
Adam Jackson | 171fdd8 | 2010-03-29 21:43:31 +0000 | [diff] [blame] | 278 | return drm_mode; |
Zhao Yakui | d782c3f | 2009-06-22 13:17:08 +0800 | [diff] [blame] | 279 | } |
| 280 | EXPORT_SYMBOL(drm_cvt_mode); |
| 281 | |
| 282 | /** |
Adam Jackson | 7a37435 | 2010-03-29 21:43:30 +0000 | [diff] [blame] | 283 | * drm_gtf_mode_complex - create the modeline based on full GTF algorithm |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 284 | * |
| 285 | * @dev :drm device |
| 286 | * @hdisplay :hdisplay size |
| 287 | * @vdisplay :vdisplay size |
| 288 | * @vrefresh :vrefresh rate. |
| 289 | * @interlaced :whether the interlace is supported |
Adam Jackson | 7a37435 | 2010-03-29 21:43:30 +0000 | [diff] [blame] | 290 | * @margins :desired margin size |
| 291 | * @GTF_[MCKJ] :extended GTF formula parameters |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 292 | * |
| 293 | * LOCKING. |
| 294 | * none. |
| 295 | * |
Adam Jackson | 7a37435 | 2010-03-29 21:43:30 +0000 | [diff] [blame] | 296 | * return the modeline based on full GTF algorithm. |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 297 | * |
Adam Jackson | 7a37435 | 2010-03-29 21:43:30 +0000 | [diff] [blame] | 298 | * GTF feature blocks specify C and J in multiples of 0.5, so we pass them |
| 299 | * in here multiplied by two. For a C of 40, pass in 80. |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 300 | */ |
Adam Jackson | 7a37435 | 2010-03-29 21:43:30 +0000 | [diff] [blame] | 301 | struct drm_display_mode * |
| 302 | drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, |
| 303 | int vrefresh, bool interlaced, int margins, |
| 304 | int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) |
| 305 | { /* 1) top/bottom margin size (% of height) - default: 1.8, */ |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 306 | #define GTF_MARGIN_PERCENTAGE 18 |
| 307 | /* 2) character cell horizontal granularity (pixels) - default 8 */ |
| 308 | #define GTF_CELL_GRAN 8 |
| 309 | /* 3) Minimum vertical porch (lines) - default 3 */ |
| 310 | #define GTF_MIN_V_PORCH 1 |
| 311 | /* width of vsync in lines */ |
| 312 | #define V_SYNC_RQD 3 |
| 313 | /* width of hsync as % of total line */ |
| 314 | #define H_SYNC_PERCENT 8 |
| 315 | /* min time of vsync + back porch (microsec) */ |
| 316 | #define MIN_VSYNC_PLUS_BP 550 |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 317 | /* C' and M' are part of the Blanking Duty Cycle computation */ |
Adam Jackson | 7a37435 | 2010-03-29 21:43:30 +0000 | [diff] [blame] | 318 | #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) |
| 319 | #define GTF_M_PRIME (GTF_K * GTF_M / 256) |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 320 | struct drm_display_mode *drm_mode; |
| 321 | unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; |
| 322 | int top_margin, bottom_margin; |
| 323 | int interlace; |
| 324 | unsigned int hfreq_est; |
| 325 | int vsync_plus_bp, vback_porch; |
| 326 | unsigned int vtotal_lines, vfieldrate_est, hperiod; |
| 327 | unsigned int vfield_rate, vframe_rate; |
| 328 | int left_margin, right_margin; |
| 329 | unsigned int total_active_pixels, ideal_duty_cycle; |
| 330 | unsigned int hblank, total_pixels, pixel_freq; |
| 331 | int hsync, hfront_porch, vodd_front_porch_lines; |
| 332 | unsigned int tmp1, tmp2; |
| 333 | |
| 334 | drm_mode = drm_mode_create(dev); |
| 335 | if (!drm_mode) |
| 336 | return NULL; |
| 337 | |
| 338 | /* 1. In order to give correct results, the number of horizontal |
| 339 | * pixels requested is first processed to ensure that it is divisible |
| 340 | * by the character size, by rounding it to the nearest character |
| 341 | * cell boundary: |
| 342 | */ |
| 343 | hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; |
| 344 | hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; |
| 345 | |
| 346 | /* 2. If interlace is requested, the number of vertical lines assumed |
| 347 | * by the calculation must be halved, as the computation calculates |
| 348 | * the number of vertical lines per field. |
| 349 | */ |
| 350 | if (interlaced) |
| 351 | vdisplay_rnd = vdisplay / 2; |
| 352 | else |
| 353 | vdisplay_rnd = vdisplay; |
| 354 | |
| 355 | /* 3. Find the frame rate required: */ |
| 356 | if (interlaced) |
| 357 | vfieldrate_rqd = vrefresh * 2; |
| 358 | else |
| 359 | vfieldrate_rqd = vrefresh; |
| 360 | |
| 361 | /* 4. Find number of lines in Top margin: */ |
| 362 | top_margin = 0; |
| 363 | if (margins) |
| 364 | top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / |
| 365 | 1000; |
| 366 | /* 5. Find number of lines in bottom margin: */ |
| 367 | bottom_margin = top_margin; |
| 368 | |
| 369 | /* 6. If interlace is required, then set variable interlace: */ |
| 370 | if (interlaced) |
| 371 | interlace = 1; |
| 372 | else |
| 373 | interlace = 0; |
| 374 | |
| 375 | /* 7. Estimate the Horizontal frequency */ |
| 376 | { |
| 377 | tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; |
| 378 | tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * |
| 379 | 2 + interlace; |
| 380 | hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; |
| 381 | } |
| 382 | |
| 383 | /* 8. Find the number of lines in V sync + back porch */ |
| 384 | /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ |
| 385 | vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; |
| 386 | vsync_plus_bp = (vsync_plus_bp + 500) / 1000; |
| 387 | /* 9. Find the number of lines in V back porch alone: */ |
| 388 | vback_porch = vsync_plus_bp - V_SYNC_RQD; |
| 389 | /* 10. Find the total number of lines in Vertical field period: */ |
| 390 | vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + |
| 391 | vsync_plus_bp + GTF_MIN_V_PORCH; |
| 392 | /* 11. Estimate the Vertical field frequency: */ |
| 393 | vfieldrate_est = hfreq_est / vtotal_lines; |
| 394 | /* 12. Find the actual horizontal period: */ |
| 395 | hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); |
| 396 | |
| 397 | /* 13. Find the actual Vertical field frequency: */ |
| 398 | vfield_rate = hfreq_est / vtotal_lines; |
| 399 | /* 14. Find the Vertical frame frequency: */ |
| 400 | if (interlaced) |
| 401 | vframe_rate = vfield_rate / 2; |
| 402 | else |
| 403 | vframe_rate = vfield_rate; |
| 404 | /* 15. Find number of pixels in left margin: */ |
| 405 | if (margins) |
| 406 | left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / |
| 407 | 1000; |
| 408 | else |
| 409 | left_margin = 0; |
| 410 | |
| 411 | /* 16.Find number of pixels in right margin: */ |
| 412 | right_margin = left_margin; |
| 413 | /* 17.Find total number of active pixels in image and left and right */ |
| 414 | total_active_pixels = hdisplay_rnd + left_margin + right_margin; |
| 415 | /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ |
| 416 | ideal_duty_cycle = GTF_C_PRIME * 1000 - |
| 417 | (GTF_M_PRIME * 1000000 / hfreq_est); |
| 418 | /* 19.Find the number of pixels in the blanking time to the nearest |
| 419 | * double character cell: */ |
| 420 | hblank = total_active_pixels * ideal_duty_cycle / |
| 421 | (100000 - ideal_duty_cycle); |
| 422 | hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); |
| 423 | hblank = hblank * 2 * GTF_CELL_GRAN; |
| 424 | /* 20.Find total number of pixels: */ |
| 425 | total_pixels = total_active_pixels + hblank; |
| 426 | /* 21.Find pixel clock frequency: */ |
| 427 | pixel_freq = total_pixels * hfreq_est / 1000; |
| 428 | /* Stage 1 computations are now complete; I should really pass |
| 429 | * the results to another function and do the Stage 2 computations, |
| 430 | * but I only need a few more values so I'll just append the |
| 431 | * computations here for now */ |
| 432 | /* 17. Find the number of pixels in the horizontal sync period: */ |
| 433 | hsync = H_SYNC_PERCENT * total_pixels / 100; |
| 434 | hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; |
| 435 | hsync = hsync * GTF_CELL_GRAN; |
| 436 | /* 18. Find the number of pixels in horizontal front porch period */ |
| 437 | hfront_porch = hblank / 2 - hsync; |
| 438 | /* 36. Find the number of lines in the odd front porch period: */ |
| 439 | vodd_front_porch_lines = GTF_MIN_V_PORCH ; |
| 440 | |
| 441 | /* finally, pack the results in the mode struct */ |
| 442 | drm_mode->hdisplay = hdisplay_rnd; |
| 443 | drm_mode->hsync_start = hdisplay_rnd + hfront_porch; |
| 444 | drm_mode->hsync_end = drm_mode->hsync_start + hsync; |
| 445 | drm_mode->htotal = total_pixels; |
| 446 | drm_mode->vdisplay = vdisplay_rnd; |
| 447 | drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; |
| 448 | drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; |
| 449 | drm_mode->vtotal = vtotal_lines; |
| 450 | |
| 451 | drm_mode->clock = pixel_freq; |
| 452 | |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 453 | if (interlaced) { |
| 454 | drm_mode->vtotal *= 2; |
| 455 | drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
| 456 | } |
| 457 | |
Adam Jackson | 171fdd8 | 2010-03-29 21:43:31 +0000 | [diff] [blame] | 458 | drm_mode_set_name(drm_mode); |
Adam Jackson | c385e50c | 2010-04-08 19:00:30 +0000 | [diff] [blame] | 459 | if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) |
| 460 | drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; |
| 461 | else |
| 462 | drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; |
Adam Jackson | 171fdd8 | 2010-03-29 21:43:31 +0000 | [diff] [blame] | 463 | |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 464 | return drm_mode; |
| 465 | } |
Adam Jackson | 7a37435 | 2010-03-29 21:43:30 +0000 | [diff] [blame] | 466 | EXPORT_SYMBOL(drm_gtf_mode_complex); |
| 467 | |
| 468 | /** |
| 469 | * drm_gtf_mode - create the modeline based on GTF algorithm |
| 470 | * |
| 471 | * @dev :drm device |
| 472 | * @hdisplay :hdisplay size |
| 473 | * @vdisplay :vdisplay size |
| 474 | * @vrefresh :vrefresh rate. |
| 475 | * @interlaced :whether the interlace is supported |
| 476 | * @margins :whether the margin is supported |
| 477 | * |
| 478 | * LOCKING. |
| 479 | * none. |
| 480 | * |
| 481 | * return the modeline based on GTF algorithm |
| 482 | * |
| 483 | * This function is to create the modeline based on the GTF algorithm. |
| 484 | * Generalized Timing Formula is derived from: |
| 485 | * GTF Spreadsheet by Andy Morrish (1/5/97) |
| 486 | * available at http://www.vesa.org |
| 487 | * |
| 488 | * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. |
| 489 | * What I have done is to translate it by using integer calculation. |
| 490 | * I also refer to the function of fb_get_mode in the file of |
| 491 | * drivers/video/fbmon.c |
| 492 | * |
| 493 | * Standard GTF parameters: |
| 494 | * M = 600 |
| 495 | * C = 40 |
| 496 | * K = 128 |
| 497 | * J = 20 |
| 498 | */ |
| 499 | struct drm_display_mode * |
| 500 | drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, |
| 501 | bool lace, int margins) |
| 502 | { |
| 503 | return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, lace, |
| 504 | margins, 600, 40 * 2, 128, 20 * 2); |
| 505 | } |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 506 | EXPORT_SYMBOL(drm_gtf_mode); |
Adam Jackson | 7a37435 | 2010-03-29 21:43:30 +0000 | [diff] [blame] | 507 | |
Zhao Yakui | 26bbdad | 2009-06-22 13:17:09 +0800 | [diff] [blame] | 508 | /** |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 509 | * drm_mode_set_name - set the name on a mode |
| 510 | * @mode: name will be set in this mode |
| 511 | * |
| 512 | * LOCKING: |
| 513 | * None. |
| 514 | * |
| 515 | * Set the name of @mode to a standard format. |
| 516 | */ |
| 517 | void drm_mode_set_name(struct drm_display_mode *mode) |
| 518 | { |
Adam Jackson | 171fdd8 | 2010-03-29 21:43:31 +0000 | [diff] [blame] | 519 | bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); |
| 520 | |
| 521 | snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", |
| 522 | mode->hdisplay, mode->vdisplay, |
| 523 | interlaced ? "i" : ""); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 524 | } |
| 525 | EXPORT_SYMBOL(drm_mode_set_name); |
| 526 | |
| 527 | /** |
| 528 | * drm_mode_list_concat - move modes from one list to another |
| 529 | * @head: source list |
| 530 | * @new: dst list |
| 531 | * |
| 532 | * LOCKING: |
| 533 | * Caller must ensure both lists are locked. |
| 534 | * |
| 535 | * Move all the modes from @head to @new. |
| 536 | */ |
| 537 | void drm_mode_list_concat(struct list_head *head, struct list_head *new) |
| 538 | { |
| 539 | |
| 540 | struct list_head *entry, *tmp; |
| 541 | |
| 542 | list_for_each_safe(entry, tmp, head) { |
| 543 | list_move_tail(entry, new); |
| 544 | } |
| 545 | } |
| 546 | EXPORT_SYMBOL(drm_mode_list_concat); |
| 547 | |
| 548 | /** |
| 549 | * drm_mode_width - get the width of a mode |
| 550 | * @mode: mode |
| 551 | * |
| 552 | * LOCKING: |
| 553 | * None. |
| 554 | * |
| 555 | * Return @mode's width (hdisplay) value. |
| 556 | * |
| 557 | * FIXME: is this needed? |
| 558 | * |
| 559 | * RETURNS: |
| 560 | * @mode->hdisplay |
| 561 | */ |
| 562 | int drm_mode_width(struct drm_display_mode *mode) |
| 563 | { |
| 564 | return mode->hdisplay; |
| 565 | |
| 566 | } |
| 567 | EXPORT_SYMBOL(drm_mode_width); |
| 568 | |
| 569 | /** |
| 570 | * drm_mode_height - get the height of a mode |
| 571 | * @mode: mode |
| 572 | * |
| 573 | * LOCKING: |
| 574 | * None. |
| 575 | * |
| 576 | * Return @mode's height (vdisplay) value. |
| 577 | * |
| 578 | * FIXME: is this needed? |
| 579 | * |
| 580 | * RETURNS: |
| 581 | * @mode->vdisplay |
| 582 | */ |
| 583 | int drm_mode_height(struct drm_display_mode *mode) |
| 584 | { |
| 585 | return mode->vdisplay; |
| 586 | } |
| 587 | EXPORT_SYMBOL(drm_mode_height); |
| 588 | |
Adam Jackson | 7ac96a9 | 2009-12-03 17:44:37 -0500 | [diff] [blame] | 589 | /** drm_mode_hsync - get the hsync of a mode |
| 590 | * @mode: mode |
| 591 | * |
| 592 | * LOCKING: |
| 593 | * None. |
| 594 | * |
| 595 | * Return @modes's hsync rate in kHz, rounded to the nearest int. |
| 596 | */ |
Chris Wilson | b1f559e | 2011-01-26 09:49:47 +0000 | [diff] [blame] | 597 | int drm_mode_hsync(const struct drm_display_mode *mode) |
Adam Jackson | 7ac96a9 | 2009-12-03 17:44:37 -0500 | [diff] [blame] | 598 | { |
| 599 | unsigned int calc_val; |
| 600 | |
| 601 | if (mode->hsync) |
| 602 | return mode->hsync; |
| 603 | |
| 604 | if (mode->htotal < 0) |
| 605 | return 0; |
| 606 | |
| 607 | calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ |
| 608 | calc_val += 500; /* round to 1000Hz */ |
| 609 | calc_val /= 1000; /* truncate to kHz */ |
| 610 | |
| 611 | return calc_val; |
| 612 | } |
| 613 | EXPORT_SYMBOL(drm_mode_hsync); |
| 614 | |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 615 | /** |
| 616 | * drm_mode_vrefresh - get the vrefresh of a mode |
| 617 | * @mode: mode |
| 618 | * |
| 619 | * LOCKING: |
| 620 | * None. |
| 621 | * |
Adam Jackson | 7ac96a9 | 2009-12-03 17:44:37 -0500 | [diff] [blame] | 622 | * Return @mode's vrefresh rate in Hz or calculate it if necessary. |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 623 | * |
| 624 | * FIXME: why is this needed? shouldn't vrefresh be set already? |
| 625 | * |
| 626 | * RETURNS: |
Zhao Yakui | 559ee21 | 2009-09-03 09:33:47 +0800 | [diff] [blame] | 627 | * Vertical refresh rate. It will be the result of actual value plus 0.5. |
| 628 | * If it is 70.288, it will return 70Hz. |
| 629 | * If it is 59.6, it will return 60Hz. |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 630 | */ |
Chris Wilson | b1f559e | 2011-01-26 09:49:47 +0000 | [diff] [blame] | 631 | int drm_mode_vrefresh(const struct drm_display_mode *mode) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 632 | { |
| 633 | int refresh = 0; |
| 634 | unsigned int calc_val; |
| 635 | |
| 636 | if (mode->vrefresh > 0) |
| 637 | refresh = mode->vrefresh; |
| 638 | else if (mode->htotal > 0 && mode->vtotal > 0) { |
Zhao Yakui | 559ee21 | 2009-09-03 09:33:47 +0800 | [diff] [blame] | 639 | int vtotal; |
| 640 | vtotal = mode->vtotal; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 641 | /* work out vrefresh the value will be x1000 */ |
| 642 | calc_val = (mode->clock * 1000); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 643 | calc_val /= mode->htotal; |
Zhao Yakui | 559ee21 | 2009-09-03 09:33:47 +0800 | [diff] [blame] | 644 | refresh = (calc_val + vtotal / 2) / vtotal; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 645 | |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 646 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
| 647 | refresh *= 2; |
| 648 | if (mode->flags & DRM_MODE_FLAG_DBLSCAN) |
| 649 | refresh /= 2; |
| 650 | if (mode->vscan > 1) |
| 651 | refresh /= mode->vscan; |
| 652 | } |
| 653 | return refresh; |
| 654 | } |
| 655 | EXPORT_SYMBOL(drm_mode_vrefresh); |
| 656 | |
| 657 | /** |
| 658 | * drm_mode_set_crtcinfo - set CRTC modesetting parameters |
| 659 | * @p: mode |
| 660 | * @adjust_flags: unused? (FIXME) |
| 661 | * |
| 662 | * LOCKING: |
| 663 | * None. |
| 664 | * |
| 665 | * Setup the CRTC modesetting parameters for @p, adjusting if necessary. |
| 666 | */ |
| 667 | void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) |
| 668 | { |
| 669 | if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) |
| 670 | return; |
| 671 | |
| 672 | p->crtc_hdisplay = p->hdisplay; |
| 673 | p->crtc_hsync_start = p->hsync_start; |
| 674 | p->crtc_hsync_end = p->hsync_end; |
| 675 | p->crtc_htotal = p->htotal; |
| 676 | p->crtc_hskew = p->hskew; |
| 677 | p->crtc_vdisplay = p->vdisplay; |
| 678 | p->crtc_vsync_start = p->vsync_start; |
| 679 | p->crtc_vsync_end = p->vsync_end; |
| 680 | p->crtc_vtotal = p->vtotal; |
| 681 | |
| 682 | if (p->flags & DRM_MODE_FLAG_INTERLACE) { |
| 683 | if (adjust_flags & CRTC_INTERLACE_HALVE_V) { |
| 684 | p->crtc_vdisplay /= 2; |
| 685 | p->crtc_vsync_start /= 2; |
| 686 | p->crtc_vsync_end /= 2; |
| 687 | p->crtc_vtotal /= 2; |
| 688 | } |
| 689 | |
| 690 | p->crtc_vtotal |= 1; |
| 691 | } |
| 692 | |
| 693 | if (p->flags & DRM_MODE_FLAG_DBLSCAN) { |
| 694 | p->crtc_vdisplay *= 2; |
| 695 | p->crtc_vsync_start *= 2; |
| 696 | p->crtc_vsync_end *= 2; |
| 697 | p->crtc_vtotal *= 2; |
| 698 | } |
| 699 | |
| 700 | if (p->vscan > 1) { |
| 701 | p->crtc_vdisplay *= p->vscan; |
| 702 | p->crtc_vsync_start *= p->vscan; |
| 703 | p->crtc_vsync_end *= p->vscan; |
| 704 | p->crtc_vtotal *= p->vscan; |
| 705 | } |
| 706 | |
| 707 | p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); |
| 708 | p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); |
| 709 | p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); |
| 710 | p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); |
| 711 | |
| 712 | p->crtc_hadjusted = false; |
| 713 | p->crtc_vadjusted = false; |
| 714 | } |
| 715 | EXPORT_SYMBOL(drm_mode_set_crtcinfo); |
| 716 | |
| 717 | |
| 718 | /** |
| 719 | * drm_mode_duplicate - allocate and duplicate an existing mode |
| 720 | * @m: mode to duplicate |
| 721 | * |
| 722 | * LOCKING: |
| 723 | * None. |
| 724 | * |
| 725 | * Just allocate a new mode, copy the existing mode into it, and return |
| 726 | * a pointer to it. Used to create new instances of established modes. |
| 727 | */ |
| 728 | struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, |
Chris Wilson | b1f559e | 2011-01-26 09:49:47 +0000 | [diff] [blame] | 729 | const struct drm_display_mode *mode) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 730 | { |
| 731 | struct drm_display_mode *nmode; |
| 732 | int new_id; |
| 733 | |
| 734 | nmode = drm_mode_create(dev); |
| 735 | if (!nmode) |
| 736 | return NULL; |
| 737 | |
| 738 | new_id = nmode->base.id; |
| 739 | *nmode = *mode; |
| 740 | nmode->base.id = new_id; |
| 741 | INIT_LIST_HEAD(&nmode->head); |
| 742 | return nmode; |
| 743 | } |
| 744 | EXPORT_SYMBOL(drm_mode_duplicate); |
| 745 | |
| 746 | /** |
| 747 | * drm_mode_equal - test modes for equality |
| 748 | * @mode1: first mode |
| 749 | * @mode2: second mode |
| 750 | * |
| 751 | * LOCKING: |
| 752 | * None. |
| 753 | * |
| 754 | * Check to see if @mode1 and @mode2 are equivalent. |
| 755 | * |
| 756 | * RETURNS: |
| 757 | * True if the modes are equal, false otherwise. |
| 758 | */ |
| 759 | bool drm_mode_equal(struct drm_display_mode *mode1, struct drm_display_mode *mode2) |
| 760 | { |
| 761 | /* do clock check convert to PICOS so fb modes get matched |
| 762 | * the same */ |
| 763 | if (mode1->clock && mode2->clock) { |
| 764 | if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) |
| 765 | return false; |
| 766 | } else if (mode1->clock != mode2->clock) |
| 767 | return false; |
| 768 | |
| 769 | if (mode1->hdisplay == mode2->hdisplay && |
| 770 | mode1->hsync_start == mode2->hsync_start && |
| 771 | mode1->hsync_end == mode2->hsync_end && |
| 772 | mode1->htotal == mode2->htotal && |
| 773 | mode1->hskew == mode2->hskew && |
| 774 | mode1->vdisplay == mode2->vdisplay && |
| 775 | mode1->vsync_start == mode2->vsync_start && |
| 776 | mode1->vsync_end == mode2->vsync_end && |
| 777 | mode1->vtotal == mode2->vtotal && |
| 778 | mode1->vscan == mode2->vscan && |
| 779 | mode1->flags == mode2->flags) |
| 780 | return true; |
| 781 | |
| 782 | return false; |
| 783 | } |
| 784 | EXPORT_SYMBOL(drm_mode_equal); |
| 785 | |
| 786 | /** |
| 787 | * drm_mode_validate_size - make sure modes adhere to size constraints |
| 788 | * @dev: DRM device |
| 789 | * @mode_list: list of modes to check |
| 790 | * @maxX: maximum width |
| 791 | * @maxY: maximum height |
| 792 | * @maxPitch: max pitch |
| 793 | * |
| 794 | * LOCKING: |
| 795 | * Caller must hold a lock protecting @mode_list. |
| 796 | * |
| 797 | * The DRM device (@dev) has size and pitch limits. Here we validate the |
| 798 | * modes we probed for @dev against those limits and set their status as |
| 799 | * necessary. |
| 800 | */ |
| 801 | void drm_mode_validate_size(struct drm_device *dev, |
| 802 | struct list_head *mode_list, |
| 803 | int maxX, int maxY, int maxPitch) |
| 804 | { |
| 805 | struct drm_display_mode *mode; |
| 806 | |
| 807 | list_for_each_entry(mode, mode_list, head) { |
| 808 | if (maxPitch > 0 && mode->hdisplay > maxPitch) |
| 809 | mode->status = MODE_BAD_WIDTH; |
| 810 | |
| 811 | if (maxX > 0 && mode->hdisplay > maxX) |
| 812 | mode->status = MODE_VIRTUAL_X; |
| 813 | |
| 814 | if (maxY > 0 && mode->vdisplay > maxY) |
| 815 | mode->status = MODE_VIRTUAL_Y; |
| 816 | } |
| 817 | } |
| 818 | EXPORT_SYMBOL(drm_mode_validate_size); |
| 819 | |
| 820 | /** |
| 821 | * drm_mode_validate_clocks - validate modes against clock limits |
| 822 | * @dev: DRM device |
| 823 | * @mode_list: list of modes to check |
| 824 | * @min: minimum clock rate array |
| 825 | * @max: maximum clock rate array |
| 826 | * @n_ranges: number of clock ranges (size of arrays) |
| 827 | * |
| 828 | * LOCKING: |
| 829 | * Caller must hold a lock protecting @mode_list. |
| 830 | * |
| 831 | * Some code may need to check a mode list against the clock limits of the |
| 832 | * device in question. This function walks the mode list, testing to make |
| 833 | * sure each mode falls within a given range (defined by @min and @max |
| 834 | * arrays) and sets @mode->status as needed. |
| 835 | */ |
| 836 | void drm_mode_validate_clocks(struct drm_device *dev, |
| 837 | struct list_head *mode_list, |
| 838 | int *min, int *max, int n_ranges) |
| 839 | { |
| 840 | struct drm_display_mode *mode; |
| 841 | int i; |
| 842 | |
| 843 | list_for_each_entry(mode, mode_list, head) { |
| 844 | bool good = false; |
| 845 | for (i = 0; i < n_ranges; i++) { |
| 846 | if (mode->clock >= min[i] && mode->clock <= max[i]) { |
| 847 | good = true; |
| 848 | break; |
| 849 | } |
| 850 | } |
| 851 | if (!good) |
| 852 | mode->status = MODE_CLOCK_RANGE; |
| 853 | } |
| 854 | } |
| 855 | EXPORT_SYMBOL(drm_mode_validate_clocks); |
| 856 | |
| 857 | /** |
| 858 | * drm_mode_prune_invalid - remove invalid modes from mode list |
| 859 | * @dev: DRM device |
| 860 | * @mode_list: list of modes to check |
| 861 | * @verbose: be verbose about it |
| 862 | * |
| 863 | * LOCKING: |
| 864 | * Caller must hold a lock protecting @mode_list. |
| 865 | * |
| 866 | * Once mode list generation is complete, a caller can use this routine to |
| 867 | * remove invalid modes from a mode list. If any of the modes have a |
| 868 | * status other than %MODE_OK, they are removed from @mode_list and freed. |
| 869 | */ |
| 870 | void drm_mode_prune_invalid(struct drm_device *dev, |
| 871 | struct list_head *mode_list, bool verbose) |
| 872 | { |
| 873 | struct drm_display_mode *mode, *t; |
| 874 | |
| 875 | list_for_each_entry_safe(mode, t, mode_list, head) { |
| 876 | if (mode->status != MODE_OK) { |
| 877 | list_del(&mode->head); |
| 878 | if (verbose) { |
| 879 | drm_mode_debug_printmodeline(mode); |
Zhao Yakui | f940f37 | 2009-07-20 13:48:05 +0800 | [diff] [blame] | 880 | DRM_DEBUG_KMS("Not using %s mode %d\n", |
yakui_zhao | f053185 | 2009-06-02 14:12:47 +0800 | [diff] [blame] | 881 | mode->name, mode->status); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 882 | } |
| 883 | drm_mode_destroy(dev, mode); |
| 884 | } |
| 885 | } |
| 886 | } |
| 887 | EXPORT_SYMBOL(drm_mode_prune_invalid); |
| 888 | |
| 889 | /** |
| 890 | * drm_mode_compare - compare modes for favorability |
Dave Chinner | 2c76127 | 2010-01-12 17:39:16 +1100 | [diff] [blame] | 891 | * @priv: unused |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 892 | * @lh_a: list_head for first mode |
| 893 | * @lh_b: list_head for second mode |
| 894 | * |
| 895 | * LOCKING: |
| 896 | * None. |
| 897 | * |
| 898 | * Compare two modes, given by @lh_a and @lh_b, returning a value indicating |
| 899 | * which is better. |
| 900 | * |
| 901 | * RETURNS: |
| 902 | * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or |
| 903 | * positive if @lh_b is better than @lh_a. |
| 904 | */ |
Dave Chinner | 2c76127 | 2010-01-12 17:39:16 +1100 | [diff] [blame] | 905 | static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 906 | { |
| 907 | struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); |
| 908 | struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); |
| 909 | int diff; |
| 910 | |
| 911 | diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - |
| 912 | ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); |
| 913 | if (diff) |
| 914 | return diff; |
| 915 | diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; |
| 916 | if (diff) |
| 917 | return diff; |
| 918 | diff = b->clock - a->clock; |
| 919 | return diff; |
| 920 | } |
| 921 | |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 922 | /** |
| 923 | * drm_mode_sort - sort mode list |
| 924 | * @mode_list: list to sort |
| 925 | * |
| 926 | * LOCKING: |
| 927 | * Caller must hold a lock protecting @mode_list. |
| 928 | * |
| 929 | * Sort @mode_list by favorability, putting good modes first. |
| 930 | */ |
| 931 | void drm_mode_sort(struct list_head *mode_list) |
| 932 | { |
Dave Chinner | 2c76127 | 2010-01-12 17:39:16 +1100 | [diff] [blame] | 933 | list_sort(NULL, mode_list, drm_mode_compare); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 934 | } |
| 935 | EXPORT_SYMBOL(drm_mode_sort); |
| 936 | |
| 937 | /** |
| 938 | * drm_mode_connector_list_update - update the mode list for the connector |
| 939 | * @connector: the connector to update |
| 940 | * |
| 941 | * LOCKING: |
| 942 | * Caller must hold a lock protecting @mode_list. |
| 943 | * |
| 944 | * This moves the modes from the @connector probed_modes list |
| 945 | * to the actual mode list. It compares the probed mode against the current |
| 946 | * list and only adds different modes. All modes unverified after this point |
| 947 | * will be removed by the prune invalid modes. |
| 948 | */ |
| 949 | void drm_mode_connector_list_update(struct drm_connector *connector) |
| 950 | { |
| 951 | struct drm_display_mode *mode; |
| 952 | struct drm_display_mode *pmode, *pt; |
| 953 | int found_it; |
| 954 | |
| 955 | list_for_each_entry_safe(pmode, pt, &connector->probed_modes, |
| 956 | head) { |
| 957 | found_it = 0; |
| 958 | /* go through current modes checking for the new probed mode */ |
| 959 | list_for_each_entry(mode, &connector->modes, head) { |
| 960 | if (drm_mode_equal(pmode, mode)) { |
| 961 | found_it = 1; |
| 962 | /* if equal delete the probed mode */ |
| 963 | mode->status = pmode->status; |
Keith Packard | 38d5487 | 2009-07-20 14:49:17 -0700 | [diff] [blame] | 964 | /* Merge type bits together */ |
| 965 | mode->type |= pmode->type; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 966 | list_del(&pmode->head); |
| 967 | drm_mode_destroy(connector->dev, pmode); |
| 968 | break; |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | if (!found_it) { |
| 973 | list_move_tail(&pmode->head, &connector->modes); |
| 974 | } |
| 975 | } |
| 976 | } |
| 977 | EXPORT_SYMBOL(drm_mode_connector_list_update); |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 978 | |
| 979 | /** |
| 980 | * drm_mode_parse_command_line_for_connector - parse command line for connector |
| 981 | * @mode_option - per connector mode option |
| 982 | * @connector - connector to parse line for |
| 983 | * |
| 984 | * This parses the connector specific then generic command lines for |
| 985 | * modes and options to configure the connector. |
| 986 | * |
| 987 | * This uses the same parameters as the fb modedb.c, except for extra |
| 988 | * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] |
| 989 | * |
| 990 | * enable/enable Digital/disable bit at the end |
| 991 | */ |
| 992 | bool drm_mode_parse_command_line_for_connector(const char *mode_option, |
| 993 | struct drm_connector *connector, |
| 994 | struct drm_cmdline_mode *mode) |
| 995 | { |
| 996 | const char *name; |
| 997 | unsigned int namelen; |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 998 | bool res_specified = false, bpp_specified = false, refresh_specified = false; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 999 | unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1000 | bool yres_specified = false, cvt = false, rb = false; |
| 1001 | bool interlace = false, margins = false, was_digit = false; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1002 | int i; |
| 1003 | enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; |
| 1004 | |
Dave Airlie | cb3c438 | 2011-05-04 13:08:58 +1000 | [diff] [blame] | 1005 | #ifdef CONFIG_FB |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1006 | if (!mode_option) |
| 1007 | mode_option = fb_mode_option; |
Dave Airlie | cb3c438 | 2011-05-04 13:08:58 +1000 | [diff] [blame] | 1008 | #endif |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1009 | |
| 1010 | if (!mode_option) { |
| 1011 | mode->specified = false; |
| 1012 | return false; |
| 1013 | } |
| 1014 | |
| 1015 | name = mode_option; |
| 1016 | namelen = strlen(name); |
| 1017 | for (i = namelen-1; i >= 0; i--) { |
| 1018 | switch (name[i]) { |
| 1019 | case '@': |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1020 | if (!refresh_specified && !bpp_specified && |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1021 | !yres_specified && !cvt && !rb && was_digit) { |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1022 | refresh = simple_strtol(&name[i+1], NULL, 10); |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1023 | refresh_specified = true; |
| 1024 | was_digit = false; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1025 | } else |
| 1026 | goto done; |
| 1027 | break; |
| 1028 | case '-': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1029 | if (!bpp_specified && !yres_specified && !cvt && |
| 1030 | !rb && was_digit) { |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1031 | bpp = simple_strtol(&name[i+1], NULL, 10); |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1032 | bpp_specified = true; |
| 1033 | was_digit = false; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1034 | } else |
| 1035 | goto done; |
| 1036 | break; |
| 1037 | case 'x': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1038 | if (!yres_specified && was_digit) { |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1039 | yres = simple_strtol(&name[i+1], NULL, 10); |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1040 | yres_specified = true; |
| 1041 | was_digit = false; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1042 | } else |
| 1043 | goto done; |
| 1044 | case '0' ... '9': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1045 | was_digit = true; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1046 | break; |
| 1047 | case 'M': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1048 | if (yres_specified || cvt || was_digit) |
| 1049 | goto done; |
| 1050 | cvt = true; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1051 | break; |
| 1052 | case 'R': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1053 | if (yres_specified || cvt || rb || was_digit) |
| 1054 | goto done; |
| 1055 | rb = true; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1056 | break; |
| 1057 | case 'm': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1058 | if (cvt || yres_specified || was_digit) |
| 1059 | goto done; |
| 1060 | margins = true; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1061 | break; |
| 1062 | case 'i': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1063 | if (cvt || yres_specified || was_digit) |
| 1064 | goto done; |
| 1065 | interlace = true; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1066 | break; |
| 1067 | case 'e': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1068 | if (yres_specified || bpp_specified || refresh_specified || |
| 1069 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
| 1070 | goto done; |
| 1071 | |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1072 | force = DRM_FORCE_ON; |
| 1073 | break; |
| 1074 | case 'D': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1075 | if (yres_specified || bpp_specified || refresh_specified || |
| 1076 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
| 1077 | goto done; |
| 1078 | |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1079 | if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && |
| 1080 | (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) |
| 1081 | force = DRM_FORCE_ON; |
| 1082 | else |
| 1083 | force = DRM_FORCE_ON_DIGITAL; |
| 1084 | break; |
| 1085 | case 'd': |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1086 | if (yres_specified || bpp_specified || refresh_specified || |
| 1087 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
| 1088 | goto done; |
| 1089 | |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1090 | force = DRM_FORCE_OFF; |
| 1091 | break; |
| 1092 | default: |
| 1093 | goto done; |
| 1094 | } |
| 1095 | } |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1096 | |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1097 | if (i < 0 && yres_specified) { |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1098 | char *ch; |
| 1099 | xres = simple_strtol(name, &ch, 10); |
| 1100 | if ((ch != NULL) && (*ch == 'x')) |
| 1101 | res_specified = true; |
| 1102 | else |
| 1103 | i = ch - name; |
| 1104 | } else if (!yres_specified && was_digit) { |
| 1105 | /* catch mode that begins with digits but has no 'x' */ |
| 1106 | i = 0; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1107 | } |
| 1108 | done: |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1109 | if (i >= 0) { |
| 1110 | printk(KERN_WARNING |
| 1111 | "parse error at position %i in video mode '%s'\n", |
| 1112 | i, name); |
| 1113 | mode->specified = false; |
| 1114 | return false; |
| 1115 | } |
| 1116 | |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1117 | if (res_specified) { |
| 1118 | mode->specified = true; |
| 1119 | mode->xres = xres; |
| 1120 | mode->yres = yres; |
| 1121 | } |
| 1122 | |
| 1123 | if (refresh_specified) { |
| 1124 | mode->refresh_specified = true; |
| 1125 | mode->refresh = refresh; |
| 1126 | } |
| 1127 | |
| 1128 | if (bpp_specified) { |
| 1129 | mode->bpp_specified = true; |
| 1130 | mode->bpp = bpp; |
| 1131 | } |
Rolf Eike Beer | 04fee89 | 2011-06-15 11:27:02 +0200 | [diff] [blame] | 1132 | mode->rb = rb; |
| 1133 | mode->cvt = cvt; |
| 1134 | mode->interlace = interlace; |
| 1135 | mode->margins = margins; |
Chris Wilson | 1794d25 | 2011-04-17 07:43:32 +0100 | [diff] [blame] | 1136 | mode->force = force; |
| 1137 | |
| 1138 | return true; |
| 1139 | } |
| 1140 | EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); |
| 1141 | |
| 1142 | struct drm_display_mode * |
| 1143 | drm_mode_create_from_cmdline_mode(struct drm_device *dev, |
| 1144 | struct drm_cmdline_mode *cmd) |
| 1145 | { |
| 1146 | struct drm_display_mode *mode; |
| 1147 | |
| 1148 | if (cmd->cvt) |
| 1149 | mode = drm_cvt_mode(dev, |
| 1150 | cmd->xres, cmd->yres, |
| 1151 | cmd->refresh_specified ? cmd->refresh : 60, |
| 1152 | cmd->rb, cmd->interlace, |
| 1153 | cmd->margins); |
| 1154 | else |
| 1155 | mode = drm_gtf_mode(dev, |
| 1156 | cmd->xres, cmd->yres, |
| 1157 | cmd->refresh_specified ? cmd->refresh : 60, |
| 1158 | cmd->interlace, |
| 1159 | cmd->margins); |
| 1160 | if (!mode) |
| 1161 | return NULL; |
| 1162 | |
| 1163 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
| 1164 | return mode; |
| 1165 | } |
| 1166 | EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); |