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drm_modes.c
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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 <[email protected]>
6  * Copyright 2005-2006 Luc Verhaegen
7  * Copyright (c) 2001, Andy Ritger [email protected]
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 
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 }
60 
84 #define HV_FACTOR 1000
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 |
273  else
274  drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
276 
277  return drm_mode;
278 }
280 
300 struct drm_display_mode *
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)
460  else
462 
463  return drm_mode;
464 }
466 
498 struct drm_display_mode *
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 }
506 
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 }
525 
536 void 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 }
546 
562 {
563  return mode->hdisplay;
564 
565 }
567 
583 {
584  return mode->vdisplay;
585 }
587 
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 }
613 
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 }
655 
666 void 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;
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;
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 
690  if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
691  p->crtc_vdisplay *= 2;
692  p->crtc_vsync_start *= 2;
693  p->crtc_vsync_end *= 2;
694  p->crtc_vtotal *= 2;
695  }
696 
697  if (p->vscan > 1) {
698  p->crtc_vdisplay *= p->vscan;
699  p->crtc_vsync_start *= p->vscan;
700  p->crtc_vsync_end *= p->vscan;
701  p->crtc_vtotal *= p->vscan;
702  }
703 
708 }
710 
711 
724 {
725  int id = dst->base.id;
726 
727  *dst = *src;
728  dst->base.id = id;
729  INIT_LIST_HEAD(&dst->head);
730 }
732 
744  const struct drm_display_mode *mode)
745 {
746  struct drm_display_mode *nmode;
747 
748  nmode = drm_mode_create(dev);
749  if (!nmode)
750  return NULL;
751 
752  drm_mode_copy(nmode, mode);
753 
754  return nmode;
755 }
757 
771 bool drm_mode_equal(struct drm_display_mode *mode1, struct drm_display_mode *mode2)
772 {
773  /* do clock check convert to PICOS so fb modes get matched
774  * the same */
775  if (mode1->clock && mode2->clock) {
776  if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
777  return false;
778  } else if (mode1->clock != mode2->clock)
779  return false;
780 
781  if (mode1->hdisplay == mode2->hdisplay &&
782  mode1->hsync_start == mode2->hsync_start &&
783  mode1->hsync_end == mode2->hsync_end &&
784  mode1->htotal == mode2->htotal &&
785  mode1->hskew == mode2->hskew &&
786  mode1->vdisplay == mode2->vdisplay &&
787  mode1->vsync_start == mode2->vsync_start &&
788  mode1->vsync_end == mode2->vsync_end &&
789  mode1->vtotal == mode2->vtotal &&
790  mode1->vscan == mode2->vscan &&
791  mode1->flags == mode2->flags)
792  return true;
793 
794  return false;
795 }
797 
814  struct list_head *mode_list,
815  int maxX, int maxY, int maxPitch)
816 {
817  struct drm_display_mode *mode;
818 
819  list_for_each_entry(mode, mode_list, head) {
820  if (maxPitch > 0 && mode->hdisplay > maxPitch)
821  mode->status = MODE_BAD_WIDTH;
822 
823  if (maxX > 0 && mode->hdisplay > maxX)
824  mode->status = MODE_VIRTUAL_X;
825 
826  if (maxY > 0 && mode->vdisplay > maxY)
827  mode->status = MODE_VIRTUAL_Y;
828  }
829 }
831 
849  struct list_head *mode_list,
850  int *min, int *max, int n_ranges)
851 {
852  struct drm_display_mode *mode;
853  int i;
854 
855  list_for_each_entry(mode, mode_list, head) {
856  bool good = false;
857  for (i = 0; i < n_ranges; i++) {
858  if (mode->clock >= min[i] && mode->clock <= max[i]) {
859  good = true;
860  break;
861  }
862  }
863  if (!good)
864  mode->status = MODE_CLOCK_RANGE;
865  }
866 }
868 
883  struct list_head *mode_list, bool verbose)
884 {
885  struct drm_display_mode *mode, *t;
886 
887  list_for_each_entry_safe(mode, t, mode_list, head) {
888  if (mode->status != MODE_OK) {
889  list_del(&mode->head);
890  if (verbose) {
892  DRM_DEBUG_KMS("Not using %s mode %d\n",
893  mode->name, mode->status);
894  }
895  drm_mode_destroy(dev, mode);
896  }
897  }
898 }
900 
917 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
918 {
919  struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
920  struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
921  int diff;
922 
923  diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
924  ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
925  if (diff)
926  return diff;
927  diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
928  if (diff)
929  return diff;
930  diff = b->clock - a->clock;
931  return diff;
932 }
933 
943 void drm_mode_sort(struct list_head *mode_list)
944 {
945  list_sort(NULL, mode_list, drm_mode_compare);
946 }
948 
962 {
963  struct drm_display_mode *mode;
964  struct drm_display_mode *pmode, *pt;
965  int found_it;
966 
967  list_for_each_entry_safe(pmode, pt, &connector->probed_modes,
968  head) {
969  found_it = 0;
970  /* go through current modes checking for the new probed mode */
971  list_for_each_entry(mode, &connector->modes, head) {
972  if (drm_mode_equal(pmode, mode)) {
973  found_it = 1;
974  /* if equal delete the probed mode */
975  mode->status = pmode->status;
976  /* Merge type bits together */
977  mode->type |= pmode->type;
978  list_del(&pmode->head);
979  drm_mode_destroy(connector->dev, pmode);
980  break;
981  }
982  }
983 
984  if (!found_it) {
985  list_move_tail(&pmode->head, &connector->modes);
986  }
987  }
988 }
990 
1004 bool drm_mode_parse_command_line_for_connector(const char *mode_option,
1005  struct drm_connector *connector,
1006  struct drm_cmdline_mode *mode)
1007 {
1008  const char *name;
1009  unsigned int namelen;
1010  bool res_specified = false, bpp_specified = false, refresh_specified = false;
1011  unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
1012  bool yres_specified = false, cvt = false, rb = false;
1013  bool interlace = false, margins = false, was_digit = false;
1014  int i;
1016 
1017 #ifdef CONFIG_FB
1018  if (!mode_option)
1019  mode_option = fb_mode_option;
1020 #endif
1021 
1022  if (!mode_option) {
1023  mode->specified = false;
1024  return false;
1025  }
1026 
1027  name = mode_option;
1028  namelen = strlen(name);
1029  for (i = namelen-1; i >= 0; i--) {
1030  switch (name[i]) {
1031  case '@':
1032  if (!refresh_specified && !bpp_specified &&
1033  !yres_specified && !cvt && !rb && was_digit) {
1034  refresh = simple_strtol(&name[i+1], NULL, 10);
1035  refresh_specified = true;
1036  was_digit = false;
1037  } else
1038  goto done;
1039  break;
1040  case '-':
1041  if (!bpp_specified && !yres_specified && !cvt &&
1042  !rb && was_digit) {
1043  bpp = simple_strtol(&name[i+1], NULL, 10);
1044  bpp_specified = true;
1045  was_digit = false;
1046  } else
1047  goto done;
1048  break;
1049  case 'x':
1050  if (!yres_specified && was_digit) {
1051  yres = simple_strtol(&name[i+1], NULL, 10);
1052  yres_specified = true;
1053  was_digit = false;
1054  } else
1055  goto done;
1056  case '0' ... '9':
1057  was_digit = true;
1058  break;
1059  case 'M':
1060  if (yres_specified || cvt || was_digit)
1061  goto done;
1062  cvt = true;
1063  break;
1064  case 'R':
1065  if (yres_specified || cvt || rb || was_digit)
1066  goto done;
1067  rb = true;
1068  break;
1069  case 'm':
1070  if (cvt || yres_specified || was_digit)
1071  goto done;
1072  margins = true;
1073  break;
1074  case 'i':
1075  if (cvt || yres_specified || was_digit)
1076  goto done;
1077  interlace = true;
1078  break;
1079  case 'e':
1080  if (yres_specified || bpp_specified || refresh_specified ||
1081  was_digit || (force != DRM_FORCE_UNSPECIFIED))
1082  goto done;
1083 
1084  force = DRM_FORCE_ON;
1085  break;
1086  case 'D':
1087  if (yres_specified || bpp_specified || refresh_specified ||
1088  was_digit || (force != DRM_FORCE_UNSPECIFIED))
1089  goto done;
1090 
1091  if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1092  (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1093  force = DRM_FORCE_ON;
1094  else
1095  force = DRM_FORCE_ON_DIGITAL;
1096  break;
1097  case 'd':
1098  if (yres_specified || bpp_specified || refresh_specified ||
1099  was_digit || (force != DRM_FORCE_UNSPECIFIED))
1100  goto done;
1101 
1102  force = DRM_FORCE_OFF;
1103  break;
1104  default:
1105  goto done;
1106  }
1107  }
1108 
1109  if (i < 0 && yres_specified) {
1110  char *ch;
1111  xres = simple_strtol(name, &ch, 10);
1112  if ((ch != NULL) && (*ch == 'x'))
1113  res_specified = true;
1114  else
1115  i = ch - name;
1116  } else if (!yres_specified && was_digit) {
1117  /* catch mode that begins with digits but has no 'x' */
1118  i = 0;
1119  }
1120 done:
1121  if (i >= 0) {
1123  "parse error at position %i in video mode '%s'\n",
1124  i, name);
1125  mode->specified = false;
1126  return false;
1127  }
1128 
1129  if (res_specified) {
1130  mode->specified = true;
1131  mode->xres = xres;
1132  mode->yres = yres;
1133  }
1134 
1135  if (refresh_specified) {
1136  mode->refresh_specified = true;
1137  mode->refresh = refresh;
1138  }
1139 
1140  if (bpp_specified) {
1141  mode->bpp_specified = true;
1142  mode->bpp = bpp;
1143  }
1144  mode->rb = rb;
1145  mode->cvt = cvt;
1146  mode->interlace = interlace;
1147  mode->margins = margins;
1148  mode->force = force;
1149 
1150  return true;
1151 }
1153 
1154 struct drm_display_mode *
1156  struct drm_cmdline_mode *cmd)
1157 {
1158  struct drm_display_mode *mode;
1159 
1160  if (cmd->cvt)
1161  mode = drm_cvt_mode(dev,
1162  cmd->xres, cmd->yres,
1163  cmd->refresh_specified ? cmd->refresh : 60,
1164  cmd->rb, cmd->interlace,
1165  cmd->margins);
1166  else
1167  mode = drm_gtf_mode(dev,
1168  cmd->xres, cmd->yres,
1169  cmd->refresh_specified ? cmd->refresh : 60,
1170  cmd->interlace,
1171  cmd->margins);
1172  if (!mode)
1173  return NULL;
1174 
1176  return mode;
1177 }