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1/*
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>
6 * Copyright 2005-2006 Luc Verhaegen
7 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com
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>
34#include <linux/list_sort.h>
35#include "drmP.h"
36#include "drm.h"
37#include "drm_crtc.h"
38
39/**
40 * drm_mode_debug_printmodeline - debug print a mode
41 * @dev: DRM device
42 * @mode: mode to print
43 *
44 * LOCKING:
45 * None.
46 *
47 * Describe @mode using DRM_DEBUG.
48 */
49void drm_mode_debug_printmodeline(struct drm_display_mode *mode)
50{
51 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d "
52 "0x%x 0x%x\n",
53 mode->base.id, mode->name, mode->vrefresh, mode->clock,
54 mode->hdisplay, mode->hsync_start,
55 mode->hsync_end, mode->htotal,
56 mode->vdisplay, mode->vsync_start,
57 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
58}
59EXPORT_SYMBOL(drm_mode_debug_printmodeline);
60
61/**
62 * drm_cvt_mode -create a modeline based on CVT algorithm
63 * @dev: DRM device
64 * @hdisplay: hdisplay size
65 * @vdisplay: vdisplay size
66 * @vrefresh : vrefresh rate
67 * @reduced : Whether the GTF calculation is simplified
68 * @interlaced:Whether the interlace is supported
69 *
70 * LOCKING:
71 * none.
72 *
73 * return the modeline based on CVT algorithm
74 *
75 * This function is called to generate the modeline based on CVT algorithm
76 * according to the hdisplay, vdisplay, vrefresh.
77 * It is based from the VESA(TM) Coordinated Video Timing Generator by
78 * Graham Loveridge April 9, 2003 available at
79 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
80 *
81 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
82 * What I have done is to translate it by using integer calculation.
83 */
84#define HV_FACTOR 1000
85struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
86 int vdisplay, int vrefresh,
87 bool reduced, bool interlaced, bool margins)
88{
89 /* 1) top/bottom margin size (% of height) - default: 1.8, */
90#define CVT_MARGIN_PERCENTAGE 18
91 /* 2) character cell horizontal granularity (pixels) - default 8 */
92#define CVT_H_GRANULARITY 8
93 /* 3) Minimum vertical porch (lines) - default 3 */
94#define CVT_MIN_V_PORCH 3
95 /* 4) Minimum number of vertical back porch lines - default 6 */
96#define CVT_MIN_V_BPORCH 6
97 /* Pixel Clock step (kHz) */
98#define CVT_CLOCK_STEP 250
99 struct drm_display_mode *drm_mode;
100 unsigned int vfieldrate, hperiod;
101 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
102 int interlace;
103
104 /* allocate the drm_display_mode structure. If failure, we will
105 * return directly
106 */
107 drm_mode = drm_mode_create(dev);
108 if (!drm_mode)
109 return NULL;
110
111 /* the CVT default refresh rate is 60Hz */
112 if (!vrefresh)
113 vrefresh = 60;
114
115 /* the required field fresh rate */
116 if (interlaced)
117 vfieldrate = vrefresh * 2;
118 else
119 vfieldrate = vrefresh;
120
121 /* horizontal pixels */
122 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
123
124 /* determine the left&right borders */
125 hmargin = 0;
126 if (margins) {
127 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
128 hmargin -= hmargin % CVT_H_GRANULARITY;
129 }
130 /* find the total active pixels */
131 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
132
133 /* find the number of lines per field */
134 if (interlaced)
135 vdisplay_rnd = vdisplay / 2;
136 else
137 vdisplay_rnd = vdisplay;
138
139 /* find the top & bottom borders */
140 vmargin = 0;
141 if (margins)
142 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
143
144 drm_mode->vdisplay = vdisplay + 2 * vmargin;
145
146 /* Interlaced */
147 if (interlaced)
148 interlace = 1;
149 else
150 interlace = 0;
151
152 /* Determine VSync Width from aspect ratio */
153 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
154 vsync = 4;
155 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
156 vsync = 5;
157 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
158 vsync = 6;
159 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
160 vsync = 7;
161 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
162 vsync = 7;
163 else /* custom */
164 vsync = 10;
165
166 if (!reduced) {
167 /* simplify the GTF calculation */
168 /* 4) Minimum time of vertical sync + back porch interval (µs)
169 * default 550.0
170 */
171 int tmp1, tmp2;
172#define CVT_MIN_VSYNC_BP 550
173 /* 3) Nominal HSync width (% of line period) - default 8 */
174#define CVT_HSYNC_PERCENTAGE 8
175 unsigned int hblank_percentage;
176 int vsyncandback_porch, vback_porch, hblank;
177
178 /* estimated the horizontal period */
179 tmp1 = HV_FACTOR * 1000000 -
180 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
181 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
182 interlace;
183 hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
184
185 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
186 /* 9. Find number of lines in sync + backporch */
187 if (tmp1 < (vsync + CVT_MIN_V_PORCH))
188 vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
189 else
190 vsyncandback_porch = tmp1;
191 /* 10. Find number of lines in back porch */
192 vback_porch = vsyncandback_porch - vsync;
193 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
194 vsyncandback_porch + CVT_MIN_V_PORCH;
195 /* 5) Definition of Horizontal blanking time limitation */
196 /* Gradient (%/kHz) - default 600 */
197#define CVT_M_FACTOR 600
198 /* Offset (%) - default 40 */
199#define CVT_C_FACTOR 40
200 /* Blanking time scaling factor - default 128 */
201#define CVT_K_FACTOR 128
202 /* Scaling factor weighting - default 20 */
203#define CVT_J_FACTOR 20
204#define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
205#define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
206 CVT_J_FACTOR)
207 /* 12. Find ideal blanking duty cycle from formula */
208 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
209 hperiod / 1000;
210 /* 13. Blanking time */
211 if (hblank_percentage < 20 * HV_FACTOR)
212 hblank_percentage = 20 * HV_FACTOR;
213 hblank = drm_mode->hdisplay * hblank_percentage /
214 (100 * HV_FACTOR - hblank_percentage);
215 hblank -= hblank % (2 * CVT_H_GRANULARITY);
216 /* 14. find the total pixes per line */
217 drm_mode->htotal = drm_mode->hdisplay + hblank;
218 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
219 drm_mode->hsync_start = drm_mode->hsync_end -
220 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
221 drm_mode->hsync_start += CVT_H_GRANULARITY -
222 drm_mode->hsync_start % CVT_H_GRANULARITY;
223 /* fill the Vsync values */
224 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
225 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
226 } else {
227 /* Reduced blanking */
228 /* Minimum vertical blanking interval time (µs)- default 460 */
229#define CVT_RB_MIN_VBLANK 460
230 /* Fixed number of clocks for horizontal sync */
231#define CVT_RB_H_SYNC 32
232 /* Fixed number of clocks for horizontal blanking */
233#define CVT_RB_H_BLANK 160
234 /* Fixed number of lines for vertical front porch - default 3*/
235#define CVT_RB_VFPORCH 3
236 int vbilines;
237 int tmp1, tmp2;
238 /* 8. Estimate Horizontal period. */
239 tmp1 = HV_FACTOR * 1000000 -
240 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
241 tmp2 = vdisplay_rnd + 2 * vmargin;
242 hperiod = tmp1 / (tmp2 * vfieldrate);
243 /* 9. Find number of lines in vertical blanking */
244 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
245 /* 10. Check if vertical blanking is sufficient */
246 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
247 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
248 /* 11. Find total number of lines in vertical field */
249 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
250 /* 12. Find total number of pixels in a line */
251 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
252 /* Fill in HSync values */
253 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
254 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
255 /* Fill in VSync values */
256 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
257 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
258 }
259 /* 15/13. Find pixel clock frequency (kHz for xf86) */
260 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod;
261 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP;
262 /* 18/16. Find actual vertical frame frequency */
263 /* ignore - just set the mode flag for interlaced */
264 if (interlaced) {
265 drm_mode->vtotal *= 2;
266 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
267 }
268 /* Fill the mode line name */
269 drm_mode_set_name(drm_mode);
270 if (reduced)
271 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
272 DRM_MODE_FLAG_NVSYNC);
273 else
274 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
275 DRM_MODE_FLAG_NHSYNC);
276
277 return drm_mode;
278}
279EXPORT_SYMBOL(drm_cvt_mode);
280
281/**
282 * drm_gtf_mode_complex - create the modeline based on full GTF algorithm
283 *
284 * @dev :drm device
285 * @hdisplay :hdisplay size
286 * @vdisplay :vdisplay size
287 * @vrefresh :vrefresh rate.
288 * @interlaced :whether the interlace is supported
289 * @margins :desired margin size
290 * @GTF_[MCKJ] :extended GTF formula parameters
291 *
292 * LOCKING.
293 * none.
294 *
295 * return the modeline based on full GTF algorithm.
296 *
297 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
298 * in here multiplied by two. For a C of 40, pass in 80.
299 */
300struct drm_display_mode *
301drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
302 int vrefresh, bool interlaced, int margins,
303 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
304{ /* 1) top/bottom margin size (% of height) - default: 1.8, */
305#define GTF_MARGIN_PERCENTAGE 18
306 /* 2) character cell horizontal granularity (pixels) - default 8 */
307#define GTF_CELL_GRAN 8
308 /* 3) Minimum vertical porch (lines) - default 3 */
309#define GTF_MIN_V_PORCH 1
310 /* width of vsync in lines */
311#define V_SYNC_RQD 3
312 /* width of hsync as % of total line */
313#define H_SYNC_PERCENT 8
314 /* min time of vsync + back porch (microsec) */
315#define MIN_VSYNC_PLUS_BP 550
316 /* C' and M' are part of the Blanking Duty Cycle computation */
317#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
318#define GTF_M_PRIME (GTF_K * GTF_M / 256)
319 struct drm_display_mode *drm_mode;
320 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
321 int top_margin, bottom_margin;
322 int interlace;
323 unsigned int hfreq_est;
324 int vsync_plus_bp, vback_porch;
325 unsigned int vtotal_lines, vfieldrate_est, hperiod;
326 unsigned int vfield_rate, vframe_rate;
327 int left_margin, right_margin;
328 unsigned int total_active_pixels, ideal_duty_cycle;
329 unsigned int hblank, total_pixels, pixel_freq;
330 int hsync, hfront_porch, vodd_front_porch_lines;
331 unsigned int tmp1, tmp2;
332
333 drm_mode = drm_mode_create(dev);
334 if (!drm_mode)
335 return NULL;
336
337 /* 1. In order to give correct results, the number of horizontal
338 * pixels requested is first processed to ensure that it is divisible
339 * by the character size, by rounding it to the nearest character
340 * cell boundary:
341 */
342 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
343 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
344
345 /* 2. If interlace is requested, the number of vertical lines assumed
346 * by the calculation must be halved, as the computation calculates
347 * the number of vertical lines per field.
348 */
349 if (interlaced)
350 vdisplay_rnd = vdisplay / 2;
351 else
352 vdisplay_rnd = vdisplay;
353
354 /* 3. Find the frame rate required: */
355 if (interlaced)
356 vfieldrate_rqd = vrefresh * 2;
357 else
358 vfieldrate_rqd = vrefresh;
359
360 /* 4. Find number of lines in Top margin: */
361 top_margin = 0;
362 if (margins)
363 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
364 1000;
365 /* 5. Find number of lines in bottom margin: */
366 bottom_margin = top_margin;
367
368 /* 6. If interlace is required, then set variable interlace: */
369 if (interlaced)
370 interlace = 1;
371 else
372 interlace = 0;
373
374 /* 7. Estimate the Horizontal frequency */
375 {
376 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
377 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
378 2 + interlace;
379 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
380 }
381
382 /* 8. Find the number of lines in V sync + back porch */
383 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
384 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
385 vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
386 /* 9. Find the number of lines in V back porch alone: */
387 vback_porch = vsync_plus_bp - V_SYNC_RQD;
388 /* 10. Find the total number of lines in Vertical field period: */
389 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
390 vsync_plus_bp + GTF_MIN_V_PORCH;
391 /* 11. Estimate the Vertical field frequency: */
392 vfieldrate_est = hfreq_est / vtotal_lines;
393 /* 12. Find the actual horizontal period: */
394 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
395
396 /* 13. Find the actual Vertical field frequency: */
397 vfield_rate = hfreq_est / vtotal_lines;
398 /* 14. Find the Vertical frame frequency: */
399 if (interlaced)
400 vframe_rate = vfield_rate / 2;
401 else
402 vframe_rate = vfield_rate;
403 /* 15. Find number of pixels in left margin: */
404 if (margins)
405 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
406 1000;
407 else
408 left_margin = 0;
409
410 /* 16.Find number of pixels in right margin: */
411 right_margin = left_margin;
412 /* 17.Find total number of active pixels in image and left and right */
413 total_active_pixels = hdisplay_rnd + left_margin + right_margin;
414 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
415 ideal_duty_cycle = GTF_C_PRIME * 1000 -
416 (GTF_M_PRIME * 1000000 / hfreq_est);
417 /* 19.Find the number of pixels in the blanking time to the nearest
418 * double character cell: */
419 hblank = total_active_pixels * ideal_duty_cycle /
420 (100000 - ideal_duty_cycle);
421 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
422 hblank = hblank * 2 * GTF_CELL_GRAN;
423 /* 20.Find total number of pixels: */
424 total_pixels = total_active_pixels + hblank;
425 /* 21.Find pixel clock frequency: */
426 pixel_freq = total_pixels * hfreq_est / 1000;
427 /* Stage 1 computations are now complete; I should really pass
428 * the results to another function and do the Stage 2 computations,
429 * but I only need a few more values so I'll just append the
430 * computations here for now */
431 /* 17. Find the number of pixels in the horizontal sync period: */
432 hsync = H_SYNC_PERCENT * total_pixels / 100;
433 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
434 hsync = hsync * GTF_CELL_GRAN;
435 /* 18. Find the number of pixels in horizontal front porch period */
436 hfront_porch = hblank / 2 - hsync;
437 /* 36. Find the number of lines in the odd front porch period: */
438 vodd_front_porch_lines = GTF_MIN_V_PORCH ;
439
440 /* finally, pack the results in the mode struct */
441 drm_mode->hdisplay = hdisplay_rnd;
442 drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
443 drm_mode->hsync_end = drm_mode->hsync_start + hsync;
444 drm_mode->htotal = total_pixels;
445 drm_mode->vdisplay = vdisplay_rnd;
446 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
447 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
448 drm_mode->vtotal = vtotal_lines;
449
450 drm_mode->clock = pixel_freq;
451
452 if (interlaced) {
453 drm_mode->vtotal *= 2;
454 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
455 }
456
457 drm_mode_set_name(drm_mode);
458 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
459 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
460 else
461 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
462
463 return drm_mode;
464}
465EXPORT_SYMBOL(drm_gtf_mode_complex);
466
467/**
468 * drm_gtf_mode - create the modeline based on GTF algorithm
469 *
470 * @dev :drm device
471 * @hdisplay :hdisplay size
472 * @vdisplay :vdisplay size
473 * @vrefresh :vrefresh rate.
474 * @interlaced :whether the interlace is supported
475 * @margins :whether the margin is supported
476 *
477 * LOCKING.
478 * none.
479 *
480 * return the modeline based on GTF algorithm
481 *
482 * This function is to create the modeline based on the GTF algorithm.
483 * Generalized Timing Formula is derived from:
484 * GTF Spreadsheet by Andy Morrish (1/5/97)
485 * available at http://www.vesa.org
486 *
487 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
488 * What I have done is to translate it by using integer calculation.
489 * I also refer to the function of fb_get_mode in the file of
490 * drivers/video/fbmon.c
491 *
492 * Standard GTF parameters:
493 * M = 600
494 * C = 40
495 * K = 128
496 * J = 20
497 */
498struct drm_display_mode *
499drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
500 bool lace, int margins)
501{
502 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, lace,
503 margins, 600, 40 * 2, 128, 20 * 2);
504}
505EXPORT_SYMBOL(drm_gtf_mode);
506
507/**
508 * drm_mode_set_name - set the name on a mode
509 * @mode: name will be set in this mode
510 *
511 * LOCKING:
512 * None.
513 *
514 * Set the name of @mode to a standard format.
515 */
516void drm_mode_set_name(struct drm_display_mode *mode)
517{
518 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
519
520 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
521 mode->hdisplay, mode->vdisplay,
522 interlaced ? "i" : "");
523}
524EXPORT_SYMBOL(drm_mode_set_name);
525
526/**
527 * drm_mode_list_concat - move modes from one list to another
528 * @head: source list
529 * @new: dst list
530 *
531 * LOCKING:
532 * Caller must ensure both lists are locked.
533 *
534 * Move all the modes from @head to @new.
535 */
536void drm_mode_list_concat(struct list_head *head, struct list_head *new)
537{
538
539 struct list_head *entry, *tmp;
540
541 list_for_each_safe(entry, tmp, head) {
542 list_move_tail(entry, new);
543 }
544}
545EXPORT_SYMBOL(drm_mode_list_concat);
546
547/**
548 * drm_mode_width - get the width of a mode
549 * @mode: mode
550 *
551 * LOCKING:
552 * None.
553 *
554 * Return @mode's width (hdisplay) value.
555 *
556 * FIXME: is this needed?
557 *
558 * RETURNS:
559 * @mode->hdisplay
560 */
561int drm_mode_width(struct drm_display_mode *mode)
562{
563 return mode->hdisplay;
564
565}
566EXPORT_SYMBOL(drm_mode_width);
567
568/**
569 * drm_mode_height - get the height of a mode
570 * @mode: mode
571 *
572 * LOCKING:
573 * None.
574 *
575 * Return @mode's height (vdisplay) value.
576 *
577 * FIXME: is this needed?
578 *
579 * RETURNS:
580 * @mode->vdisplay
581 */
582int drm_mode_height(struct drm_display_mode *mode)
583{
584 return mode->vdisplay;
585}
586EXPORT_SYMBOL(drm_mode_height);
587
588/** drm_mode_hsync - get the hsync of a mode
589 * @mode: mode
590 *
591 * LOCKING:
592 * None.
593 *
594 * Return @modes's hsync rate in kHz, rounded to the nearest int.
595 */
596int drm_mode_hsync(const struct drm_display_mode *mode)
597{
598 unsigned int calc_val;
599
600 if (mode->hsync)
601 return mode->hsync;
602
603 if (mode->htotal < 0)
604 return 0;
605
606 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
607 calc_val += 500; /* round to 1000Hz */
608 calc_val /= 1000; /* truncate to kHz */
609
610 return calc_val;
611}
612EXPORT_SYMBOL(drm_mode_hsync);
613
614/**
615 * drm_mode_vrefresh - get the vrefresh of a mode
616 * @mode: mode
617 *
618 * LOCKING:
619 * None.
620 *
621 * Return @mode's vrefresh rate in Hz or calculate it if necessary.
622 *
623 * FIXME: why is this needed? shouldn't vrefresh be set already?
624 *
625 * RETURNS:
626 * Vertical refresh rate. It will be the result of actual value plus 0.5.
627 * If it is 70.288, it will return 70Hz.
628 * If it is 59.6, it will return 60Hz.
629 */
630int drm_mode_vrefresh(const struct drm_display_mode *mode)
631{
632 int refresh = 0;
633 unsigned int calc_val;
634
635 if (mode->vrefresh > 0)
636 refresh = mode->vrefresh;
637 else if (mode->htotal > 0 && mode->vtotal > 0) {
638 int vtotal;
639 vtotal = mode->vtotal;
640 /* work out vrefresh the value will be x1000 */
641 calc_val = (mode->clock * 1000);
642 calc_val /= mode->htotal;
643 refresh = (calc_val + vtotal / 2) / vtotal;
644
645 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
646 refresh *= 2;
647 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
648 refresh /= 2;
649 if (mode->vscan > 1)
650 refresh /= mode->vscan;
651 }
652 return refresh;
653}
654EXPORT_SYMBOL(drm_mode_vrefresh);
655
656/**
657 * drm_mode_set_crtcinfo - set CRTC modesetting parameters
658 * @p: mode
659 * @adjust_flags: unused? (FIXME)
660 *
661 * LOCKING:
662 * None.
663 *
664 * Setup the CRTC modesetting parameters for @p, adjusting if necessary.
665 */
666void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
667{
668 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
669 return;
670
671 p->crtc_hdisplay = p->hdisplay;
672 p->crtc_hsync_start = p->hsync_start;
673 p->crtc_hsync_end = p->hsync_end;
674 p->crtc_htotal = p->htotal;
675 p->crtc_hskew = p->hskew;
676 p->crtc_vdisplay = p->vdisplay;
677 p->crtc_vsync_start = p->vsync_start;
678 p->crtc_vsync_end = p->vsync_end;
679 p->crtc_vtotal = p->vtotal;
680
681 if (p->flags & DRM_MODE_FLAG_INTERLACE) {
682 if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
683 p->crtc_vdisplay /= 2;
684 p->crtc_vsync_start /= 2;
685 p->crtc_vsync_end /= 2;
686 p->crtc_vtotal /= 2;
687 }
688
689 p->crtc_vtotal |= 1;
690 }
691
692 if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
693 p->crtc_vdisplay *= 2;
694 p->crtc_vsync_start *= 2;
695 p->crtc_vsync_end *= 2;
696 p->crtc_vtotal *= 2;
697 }
698
699 if (p->vscan > 1) {
700 p->crtc_vdisplay *= p->vscan;
701 p->crtc_vsync_start *= p->vscan;
702 p->crtc_vsync_end *= p->vscan;
703 p->crtc_vtotal *= p->vscan;
704 }
705
706 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
707 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
708 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
709 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
710
711 p->crtc_hadjusted = false;
712 p->crtc_vadjusted = false;
713}
714EXPORT_SYMBOL(drm_mode_set_crtcinfo);
715
716
717/**
718 * drm_mode_duplicate - allocate and duplicate an existing mode
719 * @m: mode to duplicate
720 *
721 * LOCKING:
722 * None.
723 *
724 * Just allocate a new mode, copy the existing mode into it, and return
725 * a pointer to it. Used to create new instances of established modes.
726 */
727struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
728 const struct drm_display_mode *mode)
729{
730 struct drm_display_mode *nmode;
731 int new_id;
732
733 nmode = drm_mode_create(dev);
734 if (!nmode)
735 return NULL;
736
737 new_id = nmode->base.id;
738 *nmode = *mode;
739 nmode->base.id = new_id;
740 INIT_LIST_HEAD(&nmode->head);
741 return nmode;
742}
743EXPORT_SYMBOL(drm_mode_duplicate);
744
745/**
746 * drm_mode_equal - test modes for equality
747 * @mode1: first mode
748 * @mode2: second mode
749 *
750 * LOCKING:
751 * None.
752 *
753 * Check to see if @mode1 and @mode2 are equivalent.
754 *
755 * RETURNS:
756 * True if the modes are equal, false otherwise.
757 */
758bool drm_mode_equal(struct drm_display_mode *mode1, struct drm_display_mode *mode2)
759{
760 /* do clock check convert to PICOS so fb modes get matched
761 * the same */
762 if (mode1->clock && mode2->clock) {
763 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
764 return false;
765 } else if (mode1->clock != mode2->clock)
766 return false;
767
768 if (mode1->hdisplay == mode2->hdisplay &&
769 mode1->hsync_start == mode2->hsync_start &&
770 mode1->hsync_end == mode2->hsync_end &&
771 mode1->htotal == mode2->htotal &&
772 mode1->hskew == mode2->hskew &&
773 mode1->vdisplay == mode2->vdisplay &&
774 mode1->vsync_start == mode2->vsync_start &&
775 mode1->vsync_end == mode2->vsync_end &&
776 mode1->vtotal == mode2->vtotal &&
777 mode1->vscan == mode2->vscan &&
778 mode1->flags == mode2->flags)
779 return true;
780
781 return false;
782}
783EXPORT_SYMBOL(drm_mode_equal);
784
785/**
786 * drm_mode_validate_size - make sure modes adhere to size constraints
787 * @dev: DRM device
788 * @mode_list: list of modes to check
789 * @maxX: maximum width
790 * @maxY: maximum height
791 * @maxPitch: max pitch
792 *
793 * LOCKING:
794 * Caller must hold a lock protecting @mode_list.
795 *
796 * The DRM device (@dev) has size and pitch limits. Here we validate the
797 * modes we probed for @dev against those limits and set their status as
798 * necessary.
799 */
800void drm_mode_validate_size(struct drm_device *dev,
801 struct list_head *mode_list,
802 int maxX, int maxY, int maxPitch)
803{
804 struct drm_display_mode *mode;
805
806 list_for_each_entry(mode, mode_list, head) {
807 if (maxPitch > 0 && mode->hdisplay > maxPitch)
808 mode->status = MODE_BAD_WIDTH;
809
810 if (maxX > 0 && mode->hdisplay > maxX)
811 mode->status = MODE_VIRTUAL_X;
812
813 if (maxY > 0 && mode->vdisplay > maxY)
814 mode->status = MODE_VIRTUAL_Y;
815 }
816}
817EXPORT_SYMBOL(drm_mode_validate_size);
818
819/**
820 * drm_mode_validate_clocks - validate modes against clock limits
821 * @dev: DRM device
822 * @mode_list: list of modes to check
823 * @min: minimum clock rate array
824 * @max: maximum clock rate array
825 * @n_ranges: number of clock ranges (size of arrays)
826 *
827 * LOCKING:
828 * Caller must hold a lock protecting @mode_list.
829 *
830 * Some code may need to check a mode list against the clock limits of the
831 * device in question. This function walks the mode list, testing to make
832 * sure each mode falls within a given range (defined by @min and @max
833 * arrays) and sets @mode->status as needed.
834 */
835void drm_mode_validate_clocks(struct drm_device *dev,
836 struct list_head *mode_list,
837 int *min, int *max, int n_ranges)
838{
839 struct drm_display_mode *mode;
840 int i;
841
842 list_for_each_entry(mode, mode_list, head) {
843 bool good = false;
844 for (i = 0; i < n_ranges; i++) {
845 if (mode->clock >= min[i] && mode->clock <= max[i]) {
846 good = true;
847 break;
848 }
849 }
850 if (!good)
851 mode->status = MODE_CLOCK_RANGE;
852 }
853}
854EXPORT_SYMBOL(drm_mode_validate_clocks);
855
856/**
857 * drm_mode_prune_invalid - remove invalid modes from mode list
858 * @dev: DRM device
859 * @mode_list: list of modes to check
860 * @verbose: be verbose about it
861 *
862 * LOCKING:
863 * Caller must hold a lock protecting @mode_list.
864 *
865 * Once mode list generation is complete, a caller can use this routine to
866 * remove invalid modes from a mode list. If any of the modes have a
867 * status other than %MODE_OK, they are removed from @mode_list and freed.
868 */
869void drm_mode_prune_invalid(struct drm_device *dev,
870 struct list_head *mode_list, bool verbose)
871{
872 struct drm_display_mode *mode, *t;
873
874 list_for_each_entry_safe(mode, t, mode_list, head) {
875 if (mode->status != MODE_OK) {
876 list_del(&mode->head);
877 if (verbose) {
878 drm_mode_debug_printmodeline(mode);
879 DRM_DEBUG_KMS("Not using %s mode %d\n",
880 mode->name, mode->status);
881 }
882 drm_mode_destroy(dev, mode);
883 }
884 }
885}
886EXPORT_SYMBOL(drm_mode_prune_invalid);
887
888/**
889 * drm_mode_compare - compare modes for favorability
890 * @priv: unused
891 * @lh_a: list_head for first mode
892 * @lh_b: list_head for second mode
893 *
894 * LOCKING:
895 * None.
896 *
897 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
898 * which is better.
899 *
900 * RETURNS:
901 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
902 * positive if @lh_b is better than @lh_a.
903 */
904static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
905{
906 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
907 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
908 int diff;
909
910 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
911 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
912 if (diff)
913 return diff;
914 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
915 if (diff)
916 return diff;
917 diff = b->clock - a->clock;
918 return diff;
919}
920
921/**
922 * drm_mode_sort - sort mode list
923 * @mode_list: list to sort
924 *
925 * LOCKING:
926 * Caller must hold a lock protecting @mode_list.
927 *
928 * Sort @mode_list by favorability, putting good modes first.
929 */
930void drm_mode_sort(struct list_head *mode_list)
931{
932 list_sort(NULL, mode_list, drm_mode_compare);
933}
934EXPORT_SYMBOL(drm_mode_sort);
935
936/**
937 * drm_mode_connector_list_update - update the mode list for the connector
938 * @connector: the connector to update
939 *
940 * LOCKING:
941 * Caller must hold a lock protecting @mode_list.
942 *
943 * This moves the modes from the @connector probed_modes list
944 * to the actual mode list. It compares the probed mode against the current
945 * list and only adds different modes. All modes unverified after this point
946 * will be removed by the prune invalid modes.
947 */
948void drm_mode_connector_list_update(struct drm_connector *connector)
949{
950 struct drm_display_mode *mode;
951 struct drm_display_mode *pmode, *pt;
952 int found_it;
953
954 list_for_each_entry_safe(pmode, pt, &connector->probed_modes,
955 head) {
956 found_it = 0;
957 /* go through current modes checking for the new probed mode */
958 list_for_each_entry(mode, &connector->modes, head) {
959 if (drm_mode_equal(pmode, mode)) {
960 found_it = 1;
961 /* if equal delete the probed mode */
962 mode->status = pmode->status;
963 /* Merge type bits together */
964 mode->type |= pmode->type;
965 list_del(&pmode->head);
966 drm_mode_destroy(connector->dev, pmode);
967 break;
968 }
969 }
970
971 if (!found_it) {
972 list_move_tail(&pmode->head, &connector->modes);
973 }
974 }
975}
976EXPORT_SYMBOL(drm_mode_connector_list_update);
977
978/**
979 * drm_mode_parse_command_line_for_connector - parse command line for connector
980 * @mode_option - per connector mode option
981 * @connector - connector to parse line for
982 *
983 * This parses the connector specific then generic command lines for
984 * modes and options to configure the connector.
985 *
986 * This uses the same parameters as the fb modedb.c, except for extra
987 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
988 *
989 * enable/enable Digital/disable bit at the end
990 */
991bool drm_mode_parse_command_line_for_connector(const char *mode_option,
992 struct drm_connector *connector,
993 struct drm_cmdline_mode *mode)
994{
995 const char *name;
996 unsigned int namelen;
997 bool res_specified = false, bpp_specified = false, refresh_specified = false;
998 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
999 bool yres_specified = false, cvt = false, rb = false;
1000 bool interlace = false, margins = false, was_digit = false;
1001 int i;
1002 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
1003
1004#ifdef CONFIG_FB
1005 if (!mode_option)
1006 mode_option = fb_mode_option;
1007#endif
1008
1009 if (!mode_option) {
1010 mode->specified = false;
1011 return false;
1012 }
1013
1014 name = mode_option;
1015 namelen = strlen(name);
1016 for (i = namelen-1; i >= 0; i--) {
1017 switch (name[i]) {
1018 case '@':
1019 if (!refresh_specified && !bpp_specified &&
1020 !yres_specified && !cvt && !rb && was_digit) {
1021 refresh = simple_strtol(&name[i+1], NULL, 10);
1022 refresh_specified = true;
1023 was_digit = false;
1024 } else
1025 goto done;
1026 break;
1027 case '-':
1028 if (!bpp_specified && !yres_specified && !cvt &&
1029 !rb && was_digit) {
1030 bpp = simple_strtol(&name[i+1], NULL, 10);
1031 bpp_specified = true;
1032 was_digit = false;
1033 } else
1034 goto done;
1035 break;
1036 case 'x':
1037 if (!yres_specified && was_digit) {
1038 yres = simple_strtol(&name[i+1], NULL, 10);
1039 yres_specified = true;
1040 was_digit = false;
1041 } else
1042 goto done;
1043 case '0' ... '9':
1044 was_digit = true;
1045 break;
1046 case 'M':
1047 if (yres_specified || cvt || was_digit)
1048 goto done;
1049 cvt = true;
1050 break;
1051 case 'R':
1052 if (yres_specified || cvt || rb || was_digit)
1053 goto done;
1054 rb = true;
1055 break;
1056 case 'm':
1057 if (cvt || yres_specified || was_digit)
1058 goto done;
1059 margins = true;
1060 break;
1061 case 'i':
1062 if (cvt || yres_specified || was_digit)
1063 goto done;
1064 interlace = true;
1065 break;
1066 case 'e':
1067 if (yres_specified || bpp_specified || refresh_specified ||
1068 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1069 goto done;
1070
1071 force = DRM_FORCE_ON;
1072 break;
1073 case 'D':
1074 if (yres_specified || bpp_specified || refresh_specified ||
1075 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1076 goto done;
1077
1078 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1079 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1080 force = DRM_FORCE_ON;
1081 else
1082 force = DRM_FORCE_ON_DIGITAL;
1083 break;
1084 case 'd':
1085 if (yres_specified || bpp_specified || refresh_specified ||
1086 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1087 goto done;
1088
1089 force = DRM_FORCE_OFF;
1090 break;
1091 default:
1092 goto done;
1093 }
1094 }
1095
1096 if (i < 0 && yres_specified) {
1097 char *ch;
1098 xres = simple_strtol(name, &ch, 10);
1099 if ((ch != NULL) && (*ch == 'x'))
1100 res_specified = true;
1101 else
1102 i = ch - name;
1103 } else if (!yres_specified && was_digit) {
1104 /* catch mode that begins with digits but has no 'x' */
1105 i = 0;
1106 }
1107done:
1108 if (i >= 0) {
1109 printk(KERN_WARNING
1110 "parse error at position %i in video mode '%s'\n",
1111 i, name);
1112 mode->specified = false;
1113 return false;
1114 }
1115
1116 if (res_specified) {
1117 mode->specified = true;
1118 mode->xres = xres;
1119 mode->yres = yres;
1120 }
1121
1122 if (refresh_specified) {
1123 mode->refresh_specified = true;
1124 mode->refresh = refresh;
1125 }
1126
1127 if (bpp_specified) {
1128 mode->bpp_specified = true;
1129 mode->bpp = bpp;
1130 }
1131 mode->rb = rb;
1132 mode->cvt = cvt;
1133 mode->interlace = interlace;
1134 mode->margins = margins;
1135 mode->force = force;
1136
1137 return true;
1138}
1139EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
1140
1141struct drm_display_mode *
1142drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1143 struct drm_cmdline_mode *cmd)
1144{
1145 struct drm_display_mode *mode;
1146
1147 if (cmd->cvt)
1148 mode = drm_cvt_mode(dev,
1149 cmd->xres, cmd->yres,
1150 cmd->refresh_specified ? cmd->refresh : 60,
1151 cmd->rb, cmd->interlace,
1152 cmd->margins);
1153 else
1154 mode = drm_gtf_mode(dev,
1155 cmd->xres, cmd->yres,
1156 cmd->refresh_specified ? cmd->refresh : 60,
1157 cmd->interlace,
1158 cmd->margins);
1159 if (!mode)
1160 return NULL;
1161
1162 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1163 return mode;
1164}
1165EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);
1/*
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>
6 * Copyright 2005-2006 Luc Verhaegen
7 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com
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>
34#include <linux/list_sort.h>
35#include <linux/export.h>
36#include <drm/drmP.h>
37#include <drm/drm_crtc.h>
38#include <video/of_videomode.h>
39#include <video/videomode.h>
40#include <drm/drm_modes.h>
41
42#include "drm_crtc_internal.h"
43
44/**
45 * drm_mode_debug_printmodeline - print a mode to dmesg
46 * @mode: mode to print
47 *
48 * Describe @mode using DRM_DEBUG.
49 */
50void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
51{
52 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
53}
54EXPORT_SYMBOL(drm_mode_debug_printmodeline);
55
56/**
57 * drm_mode_create - create a new display mode
58 * @dev: DRM device
59 *
60 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it
61 * and return it.
62 *
63 * Returns:
64 * Pointer to new mode on success, NULL on error.
65 */
66struct drm_display_mode *drm_mode_create(struct drm_device *dev)
67{
68 struct drm_display_mode *nmode;
69
70 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
71 if (!nmode)
72 return NULL;
73
74 if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
75 kfree(nmode);
76 return NULL;
77 }
78
79 return nmode;
80}
81EXPORT_SYMBOL(drm_mode_create);
82
83/**
84 * drm_mode_destroy - remove a mode
85 * @dev: DRM device
86 * @mode: mode to remove
87 *
88 * Release @mode's unique ID, then free it @mode structure itself using kfree.
89 */
90void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
91{
92 if (!mode)
93 return;
94
95 drm_mode_object_unregister(dev, &mode->base);
96
97 kfree(mode);
98}
99EXPORT_SYMBOL(drm_mode_destroy);
100
101/**
102 * drm_mode_probed_add - add a mode to a connector's probed_mode list
103 * @connector: connector the new mode
104 * @mode: mode data
105 *
106 * Add @mode to @connector's probed_mode list for later use. This list should
107 * then in a second step get filtered and all the modes actually supported by
108 * the hardware moved to the @connector's modes list.
109 */
110void drm_mode_probed_add(struct drm_connector *connector,
111 struct drm_display_mode *mode)
112{
113 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
114
115 list_add_tail(&mode->head, &connector->probed_modes);
116}
117EXPORT_SYMBOL(drm_mode_probed_add);
118
119/**
120 * drm_cvt_mode -create a modeline based on the CVT algorithm
121 * @dev: drm device
122 * @hdisplay: hdisplay size
123 * @vdisplay: vdisplay size
124 * @vrefresh: vrefresh rate
125 * @reduced: whether to use reduced blanking
126 * @interlaced: whether to compute an interlaced mode
127 * @margins: whether to add margins (borders)
128 *
129 * This function is called to generate the modeline based on CVT algorithm
130 * according to the hdisplay, vdisplay, vrefresh.
131 * It is based from the VESA(TM) Coordinated Video Timing Generator by
132 * Graham Loveridge April 9, 2003 available at
133 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
134 *
135 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
136 * What I have done is to translate it by using integer calculation.
137 *
138 * Returns:
139 * The modeline based on the CVT algorithm stored in a drm_display_mode object.
140 * The display mode object is allocated with drm_mode_create(). Returns NULL
141 * when no mode could be allocated.
142 */
143struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
144 int vdisplay, int vrefresh,
145 bool reduced, bool interlaced, bool margins)
146{
147#define HV_FACTOR 1000
148 /* 1) top/bottom margin size (% of height) - default: 1.8, */
149#define CVT_MARGIN_PERCENTAGE 18
150 /* 2) character cell horizontal granularity (pixels) - default 8 */
151#define CVT_H_GRANULARITY 8
152 /* 3) Minimum vertical porch (lines) - default 3 */
153#define CVT_MIN_V_PORCH 3
154 /* 4) Minimum number of vertical back porch lines - default 6 */
155#define CVT_MIN_V_BPORCH 6
156 /* Pixel Clock step (kHz) */
157#define CVT_CLOCK_STEP 250
158 struct drm_display_mode *drm_mode;
159 unsigned int vfieldrate, hperiod;
160 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
161 int interlace;
162 u64 tmp;
163
164 /* allocate the drm_display_mode structure. If failure, we will
165 * return directly
166 */
167 drm_mode = drm_mode_create(dev);
168 if (!drm_mode)
169 return NULL;
170
171 /* the CVT default refresh rate is 60Hz */
172 if (!vrefresh)
173 vrefresh = 60;
174
175 /* the required field fresh rate */
176 if (interlaced)
177 vfieldrate = vrefresh * 2;
178 else
179 vfieldrate = vrefresh;
180
181 /* horizontal pixels */
182 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
183
184 /* determine the left&right borders */
185 hmargin = 0;
186 if (margins) {
187 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
188 hmargin -= hmargin % CVT_H_GRANULARITY;
189 }
190 /* find the total active pixels */
191 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
192
193 /* find the number of lines per field */
194 if (interlaced)
195 vdisplay_rnd = vdisplay / 2;
196 else
197 vdisplay_rnd = vdisplay;
198
199 /* find the top & bottom borders */
200 vmargin = 0;
201 if (margins)
202 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
203
204 drm_mode->vdisplay = vdisplay + 2 * vmargin;
205
206 /* Interlaced */
207 if (interlaced)
208 interlace = 1;
209 else
210 interlace = 0;
211
212 /* Determine VSync Width from aspect ratio */
213 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
214 vsync = 4;
215 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
216 vsync = 5;
217 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
218 vsync = 6;
219 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
220 vsync = 7;
221 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
222 vsync = 7;
223 else /* custom */
224 vsync = 10;
225
226 if (!reduced) {
227 /* simplify the GTF calculation */
228 /* 4) Minimum time of vertical sync + back porch interval (µs)
229 * default 550.0
230 */
231 int tmp1, tmp2;
232#define CVT_MIN_VSYNC_BP 550
233 /* 3) Nominal HSync width (% of line period) - default 8 */
234#define CVT_HSYNC_PERCENTAGE 8
235 unsigned int hblank_percentage;
236 int vsyncandback_porch, vback_porch, hblank;
237
238 /* estimated the horizontal period */
239 tmp1 = HV_FACTOR * 1000000 -
240 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
241 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
242 interlace;
243 hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
244
245 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
246 /* 9. Find number of lines in sync + backporch */
247 if (tmp1 < (vsync + CVT_MIN_V_PORCH))
248 vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
249 else
250 vsyncandback_porch = tmp1;
251 /* 10. Find number of lines in back porch */
252 vback_porch = vsyncandback_porch - vsync;
253 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
254 vsyncandback_porch + CVT_MIN_V_PORCH;
255 /* 5) Definition of Horizontal blanking time limitation */
256 /* Gradient (%/kHz) - default 600 */
257#define CVT_M_FACTOR 600
258 /* Offset (%) - default 40 */
259#define CVT_C_FACTOR 40
260 /* Blanking time scaling factor - default 128 */
261#define CVT_K_FACTOR 128
262 /* Scaling factor weighting - default 20 */
263#define CVT_J_FACTOR 20
264#define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
265#define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
266 CVT_J_FACTOR)
267 /* 12. Find ideal blanking duty cycle from formula */
268 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
269 hperiod / 1000;
270 /* 13. Blanking time */
271 if (hblank_percentage < 20 * HV_FACTOR)
272 hblank_percentage = 20 * HV_FACTOR;
273 hblank = drm_mode->hdisplay * hblank_percentage /
274 (100 * HV_FACTOR - hblank_percentage);
275 hblank -= hblank % (2 * CVT_H_GRANULARITY);
276 /* 14. find the total pixels per line */
277 drm_mode->htotal = drm_mode->hdisplay + hblank;
278 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
279 drm_mode->hsync_start = drm_mode->hsync_end -
280 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
281 drm_mode->hsync_start += CVT_H_GRANULARITY -
282 drm_mode->hsync_start % CVT_H_GRANULARITY;
283 /* fill the Vsync values */
284 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
285 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
286 } else {
287 /* Reduced blanking */
288 /* Minimum vertical blanking interval time (µs)- default 460 */
289#define CVT_RB_MIN_VBLANK 460
290 /* Fixed number of clocks for horizontal sync */
291#define CVT_RB_H_SYNC 32
292 /* Fixed number of clocks for horizontal blanking */
293#define CVT_RB_H_BLANK 160
294 /* Fixed number of lines for vertical front porch - default 3*/
295#define CVT_RB_VFPORCH 3
296 int vbilines;
297 int tmp1, tmp2;
298 /* 8. Estimate Horizontal period. */
299 tmp1 = HV_FACTOR * 1000000 -
300 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
301 tmp2 = vdisplay_rnd + 2 * vmargin;
302 hperiod = tmp1 / (tmp2 * vfieldrate);
303 /* 9. Find number of lines in vertical blanking */
304 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
305 /* 10. Check if vertical blanking is sufficient */
306 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
307 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
308 /* 11. Find total number of lines in vertical field */
309 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
310 /* 12. Find total number of pixels in a line */
311 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
312 /* Fill in HSync values */
313 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
314 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
315 /* Fill in VSync values */
316 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
317 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
318 }
319 /* 15/13. Find pixel clock frequency (kHz for xf86) */
320 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */
321 tmp *= HV_FACTOR * 1000;
322 do_div(tmp, hperiod);
323 tmp -= drm_mode->clock % CVT_CLOCK_STEP;
324 drm_mode->clock = tmp;
325 /* 18/16. Find actual vertical frame frequency */
326 /* ignore - just set the mode flag for interlaced */
327 if (interlaced) {
328 drm_mode->vtotal *= 2;
329 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
330 }
331 /* Fill the mode line name */
332 drm_mode_set_name(drm_mode);
333 if (reduced)
334 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
335 DRM_MODE_FLAG_NVSYNC);
336 else
337 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
338 DRM_MODE_FLAG_NHSYNC);
339
340 return drm_mode;
341}
342EXPORT_SYMBOL(drm_cvt_mode);
343
344/**
345 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm
346 * @dev: drm device
347 * @hdisplay: hdisplay size
348 * @vdisplay: vdisplay size
349 * @vrefresh: vrefresh rate.
350 * @interlaced: whether to compute an interlaced mode
351 * @margins: desired margin (borders) size
352 * @GTF_M: extended GTF formula parameters
353 * @GTF_2C: extended GTF formula parameters
354 * @GTF_K: extended GTF formula parameters
355 * @GTF_2J: extended GTF formula parameters
356 *
357 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
358 * in here multiplied by two. For a C of 40, pass in 80.
359 *
360 * Returns:
361 * The modeline based on the full GTF algorithm stored in a drm_display_mode object.
362 * The display mode object is allocated with drm_mode_create(). Returns NULL
363 * when no mode could be allocated.
364 */
365struct drm_display_mode *
366drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
367 int vrefresh, bool interlaced, int margins,
368 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
369{ /* 1) top/bottom margin size (% of height) - default: 1.8, */
370#define GTF_MARGIN_PERCENTAGE 18
371 /* 2) character cell horizontal granularity (pixels) - default 8 */
372#define GTF_CELL_GRAN 8
373 /* 3) Minimum vertical porch (lines) - default 3 */
374#define GTF_MIN_V_PORCH 1
375 /* width of vsync in lines */
376#define V_SYNC_RQD 3
377 /* width of hsync as % of total line */
378#define H_SYNC_PERCENT 8
379 /* min time of vsync + back porch (microsec) */
380#define MIN_VSYNC_PLUS_BP 550
381 /* C' and M' are part of the Blanking Duty Cycle computation */
382#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
383#define GTF_M_PRIME (GTF_K * GTF_M / 256)
384 struct drm_display_mode *drm_mode;
385 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
386 int top_margin, bottom_margin;
387 int interlace;
388 unsigned int hfreq_est;
389 int vsync_plus_bp, vback_porch;
390 unsigned int vtotal_lines, vfieldrate_est, hperiod;
391 unsigned int vfield_rate, vframe_rate;
392 int left_margin, right_margin;
393 unsigned int total_active_pixels, ideal_duty_cycle;
394 unsigned int hblank, total_pixels, pixel_freq;
395 int hsync, hfront_porch, vodd_front_porch_lines;
396 unsigned int tmp1, tmp2;
397
398 drm_mode = drm_mode_create(dev);
399 if (!drm_mode)
400 return NULL;
401
402 /* 1. In order to give correct results, the number of horizontal
403 * pixels requested is first processed to ensure that it is divisible
404 * by the character size, by rounding it to the nearest character
405 * cell boundary:
406 */
407 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
408 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
409
410 /* 2. If interlace is requested, the number of vertical lines assumed
411 * by the calculation must be halved, as the computation calculates
412 * the number of vertical lines per field.
413 */
414 if (interlaced)
415 vdisplay_rnd = vdisplay / 2;
416 else
417 vdisplay_rnd = vdisplay;
418
419 /* 3. Find the frame rate required: */
420 if (interlaced)
421 vfieldrate_rqd = vrefresh * 2;
422 else
423 vfieldrate_rqd = vrefresh;
424
425 /* 4. Find number of lines in Top margin: */
426 top_margin = 0;
427 if (margins)
428 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
429 1000;
430 /* 5. Find number of lines in bottom margin: */
431 bottom_margin = top_margin;
432
433 /* 6. If interlace is required, then set variable interlace: */
434 if (interlaced)
435 interlace = 1;
436 else
437 interlace = 0;
438
439 /* 7. Estimate the Horizontal frequency */
440 {
441 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
442 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
443 2 + interlace;
444 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
445 }
446
447 /* 8. Find the number of lines in V sync + back porch */
448 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
449 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
450 vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
451 /* 9. Find the number of lines in V back porch alone: */
452 vback_porch = vsync_plus_bp - V_SYNC_RQD;
453 /* 10. Find the total number of lines in Vertical field period: */
454 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
455 vsync_plus_bp + GTF_MIN_V_PORCH;
456 /* 11. Estimate the Vertical field frequency: */
457 vfieldrate_est = hfreq_est / vtotal_lines;
458 /* 12. Find the actual horizontal period: */
459 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
460
461 /* 13. Find the actual Vertical field frequency: */
462 vfield_rate = hfreq_est / vtotal_lines;
463 /* 14. Find the Vertical frame frequency: */
464 if (interlaced)
465 vframe_rate = vfield_rate / 2;
466 else
467 vframe_rate = vfield_rate;
468 /* 15. Find number of pixels in left margin: */
469 if (margins)
470 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
471 1000;
472 else
473 left_margin = 0;
474
475 /* 16.Find number of pixels in right margin: */
476 right_margin = left_margin;
477 /* 17.Find total number of active pixels in image and left and right */
478 total_active_pixels = hdisplay_rnd + left_margin + right_margin;
479 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
480 ideal_duty_cycle = GTF_C_PRIME * 1000 -
481 (GTF_M_PRIME * 1000000 / hfreq_est);
482 /* 19.Find the number of pixels in the blanking time to the nearest
483 * double character cell: */
484 hblank = total_active_pixels * ideal_duty_cycle /
485 (100000 - ideal_duty_cycle);
486 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
487 hblank = hblank * 2 * GTF_CELL_GRAN;
488 /* 20.Find total number of pixels: */
489 total_pixels = total_active_pixels + hblank;
490 /* 21.Find pixel clock frequency: */
491 pixel_freq = total_pixels * hfreq_est / 1000;
492 /* Stage 1 computations are now complete; I should really pass
493 * the results to another function and do the Stage 2 computations,
494 * but I only need a few more values so I'll just append the
495 * computations here for now */
496 /* 17. Find the number of pixels in the horizontal sync period: */
497 hsync = H_SYNC_PERCENT * total_pixels / 100;
498 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
499 hsync = hsync * GTF_CELL_GRAN;
500 /* 18. Find the number of pixels in horizontal front porch period */
501 hfront_porch = hblank / 2 - hsync;
502 /* 36. Find the number of lines in the odd front porch period: */
503 vodd_front_porch_lines = GTF_MIN_V_PORCH ;
504
505 /* finally, pack the results in the mode struct */
506 drm_mode->hdisplay = hdisplay_rnd;
507 drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
508 drm_mode->hsync_end = drm_mode->hsync_start + hsync;
509 drm_mode->htotal = total_pixels;
510 drm_mode->vdisplay = vdisplay_rnd;
511 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
512 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
513 drm_mode->vtotal = vtotal_lines;
514
515 drm_mode->clock = pixel_freq;
516
517 if (interlaced) {
518 drm_mode->vtotal *= 2;
519 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
520 }
521
522 drm_mode_set_name(drm_mode);
523 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
524 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
525 else
526 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
527
528 return drm_mode;
529}
530EXPORT_SYMBOL(drm_gtf_mode_complex);
531
532/**
533 * drm_gtf_mode - create the modeline based on the GTF algorithm
534 * @dev: drm device
535 * @hdisplay: hdisplay size
536 * @vdisplay: vdisplay size
537 * @vrefresh: vrefresh rate.
538 * @interlaced: whether to compute an interlaced mode
539 * @margins: desired margin (borders) size
540 *
541 * return the modeline based on GTF algorithm
542 *
543 * This function is to create the modeline based on the GTF algorithm.
544 * Generalized Timing Formula is derived from:
545 *
546 * GTF Spreadsheet by Andy Morrish (1/5/97)
547 * available at http://www.vesa.org
548 *
549 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
550 * What I have done is to translate it by using integer calculation.
551 * I also refer to the function of fb_get_mode in the file of
552 * drivers/video/fbmon.c
553 *
554 * Standard GTF parameters::
555 *
556 * M = 600
557 * C = 40
558 * K = 128
559 * J = 20
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.
565 */
566struct drm_display_mode *
567drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
568 bool interlaced, int margins)
569{
570 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh,
571 interlaced, margins,
572 600, 40 * 2, 128, 20 * 2);
573}
574EXPORT_SYMBOL(drm_gtf_mode);
575
576#ifdef CONFIG_VIDEOMODE_HELPERS
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 */
584void drm_display_mode_from_videomode(const struct videomode *vm,
585 struct drm_display_mode *dmode)
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;
600 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH)
601 dmode->flags |= DRM_MODE_FLAG_PHSYNC;
602 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW)
603 dmode->flags |= DRM_MODE_FLAG_NHSYNC;
604 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH)
605 dmode->flags |= DRM_MODE_FLAG_PVSYNC;
606 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW)
607 dmode->flags |= DRM_MODE_FLAG_NVSYNC;
608 if (vm->flags & DISPLAY_FLAGS_INTERLACED)
609 dmode->flags |= DRM_MODE_FLAG_INTERLACE;
610 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN)
611 dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
612 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
613 dmode->flags |= DRM_MODE_FLAG_DBLCLK;
614 drm_mode_set_name(dmode);
615}
616EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
617
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 */
625void 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}
656EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
657
658/**
659 * drm_bus_flags_from_videomode - extract information about pixelclk and
660 * DE polarity from videomode and store it in a separate variable
661 * @vm: videomode structure to use
662 * @bus_flags: information about pixelclk and DE polarity will be stored here
663 *
664 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH) and DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE
665 * in @bus_flags according to DISPLAY_FLAGS found in @vm
666 */
667void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags)
668{
669 *bus_flags = 0;
670 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
671 *bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
672 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
673 *bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
674
675 if (vm->flags & DISPLAY_FLAGS_DE_LOW)
676 *bus_flags |= DRM_BUS_FLAG_DE_LOW;
677 if (vm->flags & DISPLAY_FLAGS_DE_HIGH)
678 *bus_flags |= DRM_BUS_FLAG_DE_HIGH;
679}
680EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
681
682#ifdef CONFIG_OF
683/**
684 * of_get_drm_display_mode - get a drm_display_mode from devicetree
685 * @np: device_node with the timing specification
686 * @dmode: will be set to the return value
687 * @bus_flags: information about pixelclk and DE polarity
688 * @index: index into the list of display timings in devicetree
689 *
690 * This function is expensive and should only be used, if only one mode is to be
691 * read from DT. To get multiple modes start with of_get_display_timings and
692 * work with that instead.
693 *
694 * Returns:
695 * 0 on success, a negative errno code when no of videomode node was found.
696 */
697int of_get_drm_display_mode(struct device_node *np,
698 struct drm_display_mode *dmode, u32 *bus_flags,
699 int index)
700{
701 struct videomode vm;
702 int ret;
703
704 ret = of_get_videomode(np, &vm, index);
705 if (ret)
706 return ret;
707
708 drm_display_mode_from_videomode(&vm, dmode);
709 if (bus_flags)
710 drm_bus_flags_from_videomode(&vm, bus_flags);
711
712 pr_debug("%s: got %dx%d display mode from %s\n",
713 of_node_full_name(np), vm.hactive, vm.vactive, np->name);
714 drm_mode_debug_printmodeline(dmode);
715
716 return 0;
717}
718EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
719#endif /* CONFIG_OF */
720#endif /* CONFIG_VIDEOMODE_HELPERS */
721
722/**
723 * drm_mode_set_name - set the name on a mode
724 * @mode: name will be set in this mode
725 *
726 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay>
727 * with an optional 'i' suffix for interlaced modes.
728 */
729void drm_mode_set_name(struct drm_display_mode *mode)
730{
731 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
732
733 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
734 mode->hdisplay, mode->vdisplay,
735 interlaced ? "i" : "");
736}
737EXPORT_SYMBOL(drm_mode_set_name);
738
739/**
740 * drm_mode_hsync - get the hsync of a mode
741 * @mode: mode
742 *
743 * Returns:
744 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the
745 * value first if it is not yet set.
746 */
747int drm_mode_hsync(const struct drm_display_mode *mode)
748{
749 unsigned int calc_val;
750
751 if (mode->hsync)
752 return mode->hsync;
753
754 if (mode->htotal < 0)
755 return 0;
756
757 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
758 calc_val += 500; /* round to 1000Hz */
759 calc_val /= 1000; /* truncate to kHz */
760
761 return calc_val;
762}
763EXPORT_SYMBOL(drm_mode_hsync);
764
765/**
766 * drm_mode_vrefresh - get the vrefresh of a mode
767 * @mode: mode
768 *
769 * Returns:
770 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the
771 * value first if it is not yet set.
772 */
773int drm_mode_vrefresh(const struct drm_display_mode *mode)
774{
775 int refresh = 0;
776 unsigned int calc_val;
777
778 if (mode->vrefresh > 0)
779 refresh = mode->vrefresh;
780 else if (mode->htotal > 0 && mode->vtotal > 0) {
781 int vtotal;
782 vtotal = mode->vtotal;
783 /* work out vrefresh the value will be x1000 */
784 calc_val = (mode->clock * 1000);
785 calc_val /= mode->htotal;
786 refresh = (calc_val + vtotal / 2) / vtotal;
787
788 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
789 refresh *= 2;
790 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
791 refresh /= 2;
792 if (mode->vscan > 1)
793 refresh /= mode->vscan;
794 }
795 return refresh;
796}
797EXPORT_SYMBOL(drm_mode_vrefresh);
798
799/**
800 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
801 * @p: mode
802 * @adjust_flags: a combination of adjustment flags
803 *
804 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
805 *
806 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
807 * interlaced modes.
808 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
809 * buffers containing two eyes (only adjust the timings when needed, eg. for
810 * "frame packing" or "side by side full").
811 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not*
812 * be performed for doublescan and vscan > 1 modes respectively.
813 */
814void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
815{
816 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
817 return;
818
819 p->crtc_clock = p->clock;
820 p->crtc_hdisplay = p->hdisplay;
821 p->crtc_hsync_start = p->hsync_start;
822 p->crtc_hsync_end = p->hsync_end;
823 p->crtc_htotal = p->htotal;
824 p->crtc_hskew = p->hskew;
825 p->crtc_vdisplay = p->vdisplay;
826 p->crtc_vsync_start = p->vsync_start;
827 p->crtc_vsync_end = p->vsync_end;
828 p->crtc_vtotal = p->vtotal;
829
830 if (p->flags & DRM_MODE_FLAG_INTERLACE) {
831 if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
832 p->crtc_vdisplay /= 2;
833 p->crtc_vsync_start /= 2;
834 p->crtc_vsync_end /= 2;
835 p->crtc_vtotal /= 2;
836 }
837 }
838
839 if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
840 if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
841 p->crtc_vdisplay *= 2;
842 p->crtc_vsync_start *= 2;
843 p->crtc_vsync_end *= 2;
844 p->crtc_vtotal *= 2;
845 }
846 }
847
848 if (!(adjust_flags & CRTC_NO_VSCAN)) {
849 if (p->vscan > 1) {
850 p->crtc_vdisplay *= p->vscan;
851 p->crtc_vsync_start *= p->vscan;
852 p->crtc_vsync_end *= p->vscan;
853 p->crtc_vtotal *= p->vscan;
854 }
855 }
856
857 if (adjust_flags & CRTC_STEREO_DOUBLE) {
858 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
859
860 switch (layout) {
861 case DRM_MODE_FLAG_3D_FRAME_PACKING:
862 p->crtc_clock *= 2;
863 p->crtc_vdisplay += p->crtc_vtotal;
864 p->crtc_vsync_start += p->crtc_vtotal;
865 p->crtc_vsync_end += p->crtc_vtotal;
866 p->crtc_vtotal += p->crtc_vtotal;
867 break;
868 }
869 }
870
871 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
872 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
873 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
874 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
875}
876EXPORT_SYMBOL(drm_mode_set_crtcinfo);
877
878/**
879 * drm_mode_copy - copy the mode
880 * @dst: mode to overwrite
881 * @src: mode to copy
882 *
883 * Copy an existing mode into another mode, preserving the object id and
884 * list head of the destination mode.
885 */
886void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
887{
888 int id = dst->base.id;
889 struct list_head head = dst->head;
890
891 *dst = *src;
892 dst->base.id = id;
893 dst->head = head;
894}
895EXPORT_SYMBOL(drm_mode_copy);
896
897/**
898 * drm_mode_duplicate - allocate and duplicate an existing mode
899 * @dev: drm_device to allocate the duplicated mode for
900 * @mode: mode to duplicate
901 *
902 * Just allocate a new mode, copy the existing mode into it, and return
903 * a pointer to it. Used to create new instances of established modes.
904 *
905 * Returns:
906 * Pointer to duplicated mode on success, NULL on error.
907 */
908struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
909 const struct drm_display_mode *mode)
910{
911 struct drm_display_mode *nmode;
912
913 nmode = drm_mode_create(dev);
914 if (!nmode)
915 return NULL;
916
917 drm_mode_copy(nmode, mode);
918
919 return nmode;
920}
921EXPORT_SYMBOL(drm_mode_duplicate);
922
923/**
924 * drm_mode_equal - test modes for equality
925 * @mode1: first mode
926 * @mode2: second mode
927 *
928 * Check to see if @mode1 and @mode2 are equivalent.
929 *
930 * Returns:
931 * True if the modes are equal, false otherwise.
932 */
933bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
934{
935 if (!mode1 && !mode2)
936 return true;
937
938 if (!mode1 || !mode2)
939 return false;
940
941 /* do clock check convert to PICOS so fb modes get matched
942 * the same */
943 if (mode1->clock && mode2->clock) {
944 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
945 return false;
946 } else if (mode1->clock != mode2->clock)
947 return false;
948
949 return drm_mode_equal_no_clocks(mode1, mode2);
950}
951EXPORT_SYMBOL(drm_mode_equal);
952
953/**
954 * drm_mode_equal_no_clocks - test modes for equality
955 * @mode1: first mode
956 * @mode2: second mode
957 *
958 * Check to see if @mode1 and @mode2 are equivalent, but
959 * don't check the pixel clocks.
960 *
961 * Returns:
962 * True if the modes are equal, false otherwise.
963 */
964bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
965{
966 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) !=
967 (mode2->flags & DRM_MODE_FLAG_3D_MASK))
968 return false;
969
970 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2);
971}
972EXPORT_SYMBOL(drm_mode_equal_no_clocks);
973
974/**
975 * drm_mode_equal_no_clocks_no_stereo - test modes for equality
976 * @mode1: first mode
977 * @mode2: second mode
978 *
979 * Check to see if @mode1 and @mode2 are equivalent, but
980 * don't check the pixel clocks nor the stereo layout.
981 *
982 * Returns:
983 * True if the modes are equal, false otherwise.
984 */
985bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
986 const struct drm_display_mode *mode2)
987{
988 if (mode1->hdisplay == mode2->hdisplay &&
989 mode1->hsync_start == mode2->hsync_start &&
990 mode1->hsync_end == mode2->hsync_end &&
991 mode1->htotal == mode2->htotal &&
992 mode1->hskew == mode2->hskew &&
993 mode1->vdisplay == mode2->vdisplay &&
994 mode1->vsync_start == mode2->vsync_start &&
995 mode1->vsync_end == mode2->vsync_end &&
996 mode1->vtotal == mode2->vtotal &&
997 mode1->vscan == mode2->vscan &&
998 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
999 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK))
1000 return true;
1001
1002 return false;
1003}
1004EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
1005
1006/**
1007 * drm_mode_validate_basic - make sure the mode is somewhat sane
1008 * @mode: mode to check
1009 *
1010 * Check that the mode timings are at least somewhat reasonable.
1011 * Any hardware specific limits are left up for each driver to check.
1012 *
1013 * Returns:
1014 * The mode status
1015 */
1016enum drm_mode_status
1017drm_mode_validate_basic(const struct drm_display_mode *mode)
1018{
1019 if (mode->clock == 0)
1020 return MODE_CLOCK_LOW;
1021
1022 if (mode->hdisplay == 0 ||
1023 mode->hsync_start < mode->hdisplay ||
1024 mode->hsync_end < mode->hsync_start ||
1025 mode->htotal < mode->hsync_end)
1026 return MODE_H_ILLEGAL;
1027
1028 if (mode->vdisplay == 0 ||
1029 mode->vsync_start < mode->vdisplay ||
1030 mode->vsync_end < mode->vsync_start ||
1031 mode->vtotal < mode->vsync_end)
1032 return MODE_V_ILLEGAL;
1033
1034 return MODE_OK;
1035}
1036EXPORT_SYMBOL(drm_mode_validate_basic);
1037
1038/**
1039 * drm_mode_validate_size - make sure modes adhere to size constraints
1040 * @mode: mode to check
1041 * @maxX: maximum width
1042 * @maxY: maximum height
1043 *
1044 * This function is a helper which can be used to validate modes against size
1045 * limitations of the DRM device/connector. If a mode is too big its status
1046 * member is updated with the appropriate validation failure code. The list
1047 * itself is not changed.
1048 *
1049 * Returns:
1050 * The mode status
1051 */
1052enum drm_mode_status
1053drm_mode_validate_size(const struct drm_display_mode *mode,
1054 int maxX, int maxY)
1055{
1056 if (maxX > 0 && mode->hdisplay > maxX)
1057 return MODE_VIRTUAL_X;
1058
1059 if (maxY > 0 && mode->vdisplay > maxY)
1060 return MODE_VIRTUAL_Y;
1061
1062 return MODE_OK;
1063}
1064EXPORT_SYMBOL(drm_mode_validate_size);
1065
1066#define MODE_STATUS(status) [MODE_ ## status + 3] = #status
1067
1068static const char * const drm_mode_status_names[] = {
1069 MODE_STATUS(OK),
1070 MODE_STATUS(HSYNC),
1071 MODE_STATUS(VSYNC),
1072 MODE_STATUS(H_ILLEGAL),
1073 MODE_STATUS(V_ILLEGAL),
1074 MODE_STATUS(BAD_WIDTH),
1075 MODE_STATUS(NOMODE),
1076 MODE_STATUS(NO_INTERLACE),
1077 MODE_STATUS(NO_DBLESCAN),
1078 MODE_STATUS(NO_VSCAN),
1079 MODE_STATUS(MEM),
1080 MODE_STATUS(VIRTUAL_X),
1081 MODE_STATUS(VIRTUAL_Y),
1082 MODE_STATUS(MEM_VIRT),
1083 MODE_STATUS(NOCLOCK),
1084 MODE_STATUS(CLOCK_HIGH),
1085 MODE_STATUS(CLOCK_LOW),
1086 MODE_STATUS(CLOCK_RANGE),
1087 MODE_STATUS(BAD_HVALUE),
1088 MODE_STATUS(BAD_VVALUE),
1089 MODE_STATUS(BAD_VSCAN),
1090 MODE_STATUS(HSYNC_NARROW),
1091 MODE_STATUS(HSYNC_WIDE),
1092 MODE_STATUS(HBLANK_NARROW),
1093 MODE_STATUS(HBLANK_WIDE),
1094 MODE_STATUS(VSYNC_NARROW),
1095 MODE_STATUS(VSYNC_WIDE),
1096 MODE_STATUS(VBLANK_NARROW),
1097 MODE_STATUS(VBLANK_WIDE),
1098 MODE_STATUS(PANEL),
1099 MODE_STATUS(INTERLACE_WIDTH),
1100 MODE_STATUS(ONE_WIDTH),
1101 MODE_STATUS(ONE_HEIGHT),
1102 MODE_STATUS(ONE_SIZE),
1103 MODE_STATUS(NO_REDUCED),
1104 MODE_STATUS(NO_STEREO),
1105 MODE_STATUS(STALE),
1106 MODE_STATUS(BAD),
1107 MODE_STATUS(ERROR),
1108};
1109
1110#undef MODE_STATUS
1111
1112static const char *drm_get_mode_status_name(enum drm_mode_status status)
1113{
1114 int index = status + 3;
1115
1116 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names)))
1117 return "";
1118
1119 return drm_mode_status_names[index];
1120}
1121
1122/**
1123 * drm_mode_prune_invalid - remove invalid modes from mode list
1124 * @dev: DRM device
1125 * @mode_list: list of modes to check
1126 * @verbose: be verbose about it
1127 *
1128 * This helper function can be used to prune a display mode list after
1129 * validation has been completed. All modes who's status is not MODE_OK will be
1130 * removed from the list, and if @verbose the status code and mode name is also
1131 * printed to dmesg.
1132 */
1133void drm_mode_prune_invalid(struct drm_device *dev,
1134 struct list_head *mode_list, bool verbose)
1135{
1136 struct drm_display_mode *mode, *t;
1137
1138 list_for_each_entry_safe(mode, t, mode_list, head) {
1139 if (mode->status != MODE_OK) {
1140 list_del(&mode->head);
1141 if (verbose) {
1142 drm_mode_debug_printmodeline(mode);
1143 DRM_DEBUG_KMS("Not using %s mode: %s\n",
1144 mode->name,
1145 drm_get_mode_status_name(mode->status));
1146 }
1147 drm_mode_destroy(dev, mode);
1148 }
1149 }
1150}
1151EXPORT_SYMBOL(drm_mode_prune_invalid);
1152
1153/**
1154 * drm_mode_compare - compare modes for favorability
1155 * @priv: unused
1156 * @lh_a: list_head for first mode
1157 * @lh_b: list_head for second mode
1158 *
1159 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
1160 * which is better.
1161 *
1162 * Returns:
1163 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
1164 * positive if @lh_b is better than @lh_a.
1165 */
1166static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
1167{
1168 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
1169 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
1170 int diff;
1171
1172 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
1173 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
1174 if (diff)
1175 return diff;
1176 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
1177 if (diff)
1178 return diff;
1179
1180 diff = b->vrefresh - a->vrefresh;
1181 if (diff)
1182 return diff;
1183
1184 diff = b->clock - a->clock;
1185 return diff;
1186}
1187
1188/**
1189 * drm_mode_sort - sort mode list
1190 * @mode_list: list of drm_display_mode structures to sort
1191 *
1192 * Sort @mode_list by favorability, moving good modes to the head of the list.
1193 */
1194void drm_mode_sort(struct list_head *mode_list)
1195{
1196 list_sort(NULL, mode_list, drm_mode_compare);
1197}
1198EXPORT_SYMBOL(drm_mode_sort);
1199
1200/**
1201 * drm_mode_connector_list_update - update the mode list for the connector
1202 * @connector: the connector to update
1203 *
1204 * This moves the modes from the @connector probed_modes list
1205 * to the actual mode list. It compares the probed mode against the current
1206 * list and only adds different/new modes.
1207 *
1208 * This is just a helper functions doesn't validate any modes itself and also
1209 * doesn't prune any invalid modes. Callers need to do that themselves.
1210 */
1211void drm_mode_connector_list_update(struct drm_connector *connector)
1212{
1213 struct drm_display_mode *pmode, *pt;
1214
1215 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
1216
1217 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) {
1218 struct drm_display_mode *mode;
1219 bool found_it = false;
1220
1221 /* go through current modes checking for the new probed mode */
1222 list_for_each_entry(mode, &connector->modes, head) {
1223 if (!drm_mode_equal(pmode, mode))
1224 continue;
1225
1226 found_it = true;
1227
1228 /*
1229 * If the old matching mode is stale (ie. left over
1230 * from a previous probe) just replace it outright.
1231 * Otherwise just merge the type bits between all
1232 * equal probed modes.
1233 *
1234 * If two probed modes are considered equal, pick the
1235 * actual timings from the one that's marked as
1236 * preferred (in case the match isn't 100%). If
1237 * multiple or zero preferred modes are present, favor
1238 * the mode added to the probed_modes list first.
1239 */
1240 if (mode->status == MODE_STALE) {
1241 drm_mode_copy(mode, pmode);
1242 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 &&
1243 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) {
1244 pmode->type |= mode->type;
1245 drm_mode_copy(mode, pmode);
1246 } else {
1247 mode->type |= pmode->type;
1248 }
1249
1250 list_del(&pmode->head);
1251 drm_mode_destroy(connector->dev, pmode);
1252 break;
1253 }
1254
1255 if (!found_it) {
1256 list_move_tail(&pmode->head, &connector->modes);
1257 }
1258 }
1259}
1260EXPORT_SYMBOL(drm_mode_connector_list_update);
1261
1262/**
1263 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector
1264 * @mode_option: optional per connector mode option
1265 * @connector: connector to parse modeline for
1266 * @mode: preallocated drm_cmdline_mode structure to fill out
1267 *
1268 * This parses @mode_option command line modeline for modes and options to
1269 * configure the connector. If @mode_option is NULL the default command line
1270 * modeline in fb_mode_option will be parsed instead.
1271 *
1272 * This uses the same parameters as the fb modedb.c, except for an extra
1273 * force-enable, force-enable-digital and force-disable bit at the end:
1274 *
1275 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
1276 *
1277 * The intermediate drm_cmdline_mode structure is required to store additional
1278 * options from the command line modline like the force-enable/disable flag.
1279 *
1280 * Returns:
1281 * True if a valid modeline has been parsed, false otherwise.
1282 */
1283bool drm_mode_parse_command_line_for_connector(const char *mode_option,
1284 struct drm_connector *connector,
1285 struct drm_cmdline_mode *mode)
1286{
1287 const char *name;
1288 unsigned int namelen;
1289 bool res_specified = false, bpp_specified = false, refresh_specified = false;
1290 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
1291 bool yres_specified = false, cvt = false, rb = false;
1292 bool interlace = false, margins = false, was_digit = false;
1293 int i;
1294 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
1295
1296#ifdef CONFIG_FB
1297 if (!mode_option)
1298 mode_option = fb_mode_option;
1299#endif
1300
1301 if (!mode_option) {
1302 mode->specified = false;
1303 return false;
1304 }
1305
1306 name = mode_option;
1307 namelen = strlen(name);
1308 for (i = namelen-1; i >= 0; i--) {
1309 switch (name[i]) {
1310 case '@':
1311 if (!refresh_specified && !bpp_specified &&
1312 !yres_specified && !cvt && !rb && was_digit) {
1313 refresh = simple_strtol(&name[i+1], NULL, 10);
1314 refresh_specified = true;
1315 was_digit = false;
1316 } else
1317 goto done;
1318 break;
1319 case '-':
1320 if (!bpp_specified && !yres_specified && !cvt &&
1321 !rb && was_digit) {
1322 bpp = simple_strtol(&name[i+1], NULL, 10);
1323 bpp_specified = true;
1324 was_digit = false;
1325 } else
1326 goto done;
1327 break;
1328 case 'x':
1329 if (!yres_specified && was_digit) {
1330 yres = simple_strtol(&name[i+1], NULL, 10);
1331 yres_specified = true;
1332 was_digit = false;
1333 } else
1334 goto done;
1335 break;
1336 case '0' ... '9':
1337 was_digit = true;
1338 break;
1339 case 'M':
1340 if (yres_specified || cvt || was_digit)
1341 goto done;
1342 cvt = true;
1343 break;
1344 case 'R':
1345 if (yres_specified || cvt || rb || was_digit)
1346 goto done;
1347 rb = true;
1348 break;
1349 case 'm':
1350 if (cvt || yres_specified || was_digit)
1351 goto done;
1352 margins = true;
1353 break;
1354 case 'i':
1355 if (cvt || yres_specified || was_digit)
1356 goto done;
1357 interlace = true;
1358 break;
1359 case 'e':
1360 if (yres_specified || bpp_specified || refresh_specified ||
1361 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1362 goto done;
1363
1364 force = DRM_FORCE_ON;
1365 break;
1366 case 'D':
1367 if (yres_specified || bpp_specified || refresh_specified ||
1368 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1369 goto done;
1370
1371 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1372 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1373 force = DRM_FORCE_ON;
1374 else
1375 force = DRM_FORCE_ON_DIGITAL;
1376 break;
1377 case 'd':
1378 if (yres_specified || bpp_specified || refresh_specified ||
1379 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1380 goto done;
1381
1382 force = DRM_FORCE_OFF;
1383 break;
1384 default:
1385 goto done;
1386 }
1387 }
1388
1389 if (i < 0 && yres_specified) {
1390 char *ch;
1391 xres = simple_strtol(name, &ch, 10);
1392 if ((ch != NULL) && (*ch == 'x'))
1393 res_specified = true;
1394 else
1395 i = ch - name;
1396 } else if (!yres_specified && was_digit) {
1397 /* catch mode that begins with digits but has no 'x' */
1398 i = 0;
1399 }
1400done:
1401 if (i >= 0) {
1402 pr_warn("[drm] parse error at position %i in video mode '%s'\n",
1403 i, name);
1404 mode->specified = false;
1405 return false;
1406 }
1407
1408 if (res_specified) {
1409 mode->specified = true;
1410 mode->xres = xres;
1411 mode->yres = yres;
1412 }
1413
1414 if (refresh_specified) {
1415 mode->refresh_specified = true;
1416 mode->refresh = refresh;
1417 }
1418
1419 if (bpp_specified) {
1420 mode->bpp_specified = true;
1421 mode->bpp = bpp;
1422 }
1423 mode->rb = rb;
1424 mode->cvt = cvt;
1425 mode->interlace = interlace;
1426 mode->margins = margins;
1427 mode->force = force;
1428
1429 return true;
1430}
1431EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
1432
1433/**
1434 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
1435 * @dev: DRM device to create the new mode for
1436 * @cmd: input command line modeline
1437 *
1438 * Returns:
1439 * Pointer to converted mode on success, NULL on error.
1440 */
1441struct drm_display_mode *
1442drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1443 struct drm_cmdline_mode *cmd)
1444{
1445 struct drm_display_mode *mode;
1446
1447 if (cmd->cvt)
1448 mode = drm_cvt_mode(dev,
1449 cmd->xres, cmd->yres,
1450 cmd->refresh_specified ? cmd->refresh : 60,
1451 cmd->rb, cmd->interlace,
1452 cmd->margins);
1453 else
1454 mode = drm_gtf_mode(dev,
1455 cmd->xres, cmd->yres,
1456 cmd->refresh_specified ? cmd->refresh : 60,
1457 cmd->interlace,
1458 cmd->margins);
1459 if (!mode)
1460 return NULL;
1461
1462 mode->type |= DRM_MODE_TYPE_USERDEF;
1463 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */
1464 if (cmd->xres == 1366 && mode->hdisplay == 1368) {
1465 mode->hdisplay = 1366;
1466 mode->hsync_start--;
1467 mode->hsync_end--;
1468 drm_mode_set_name(mode);
1469 }
1470 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1471 return mode;
1472}
1473EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);
1474
1475/**
1476 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1477 * @out: drm_mode_modeinfo struct to return to the user
1478 * @in: drm_display_mode to use
1479 *
1480 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1481 * the user.
1482 */
1483void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
1484 const struct drm_display_mode *in)
1485{
1486 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1487 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1488 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1489 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1490 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1491 "timing values too large for mode info\n");
1492
1493 out->clock = in->clock;
1494 out->hdisplay = in->hdisplay;
1495 out->hsync_start = in->hsync_start;
1496 out->hsync_end = in->hsync_end;
1497 out->htotal = in->htotal;
1498 out->hskew = in->hskew;
1499 out->vdisplay = in->vdisplay;
1500 out->vsync_start = in->vsync_start;
1501 out->vsync_end = in->vsync_end;
1502 out->vtotal = in->vtotal;
1503 out->vscan = in->vscan;
1504 out->vrefresh = in->vrefresh;
1505 out->flags = in->flags;
1506 out->type = in->type;
1507 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1508 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1509}
1510
1511/**
1512 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
1513 * @out: drm_display_mode to return to the user
1514 * @in: drm_mode_modeinfo to use
1515 *
1516 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1517 * the caller.
1518 *
1519 * Returns:
1520 * Zero on success, negative errno on failure.
1521 */
1522int drm_mode_convert_umode(struct drm_display_mode *out,
1523 const struct drm_mode_modeinfo *in)
1524{
1525 int ret = -EINVAL;
1526
1527 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) {
1528 ret = -ERANGE;
1529 goto out;
1530 }
1531
1532 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
1533 goto out;
1534
1535 out->clock = in->clock;
1536 out->hdisplay = in->hdisplay;
1537 out->hsync_start = in->hsync_start;
1538 out->hsync_end = in->hsync_end;
1539 out->htotal = in->htotal;
1540 out->hskew = in->hskew;
1541 out->vdisplay = in->vdisplay;
1542 out->vsync_start = in->vsync_start;
1543 out->vsync_end = in->vsync_end;
1544 out->vtotal = in->vtotal;
1545 out->vscan = in->vscan;
1546 out->vrefresh = in->vrefresh;
1547 out->flags = in->flags;
1548 out->type = in->type;
1549 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1550 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1551
1552 out->status = drm_mode_validate_basic(out);
1553 if (out->status != MODE_OK)
1554 goto out;
1555
1556 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V);
1557
1558 ret = 0;
1559
1560out:
1561 return ret;
1562}