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
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:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
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.
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).
32 * $FreeBSD: src/sys/dev/drm2/drm_modes.c,v 1.1 2012/05/22 11:07:44 kib Exp $
35 #include <linux/export.h>
37 #include <drm/drm_crtc.h>
39 #define KHZ2PICOS(a) (1000000000UL/(a))
42 * drm_mode_debug_printmodeline - debug print a mode
44 * @mode: mode to print
49 * Describe @mode using DRM_DEBUG.
51 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
53 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d "
55 mode->base.id, mode->name, mode->vrefresh, mode->clock,
56 mode->hdisplay, mode->hsync_start,
57 mode->hsync_end, mode->htotal,
58 mode->vdisplay, mode->vsync_start,
59 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
61 EXPORT_SYMBOL(drm_mode_debug_printmodeline);
64 * drm_cvt_mode -create a modeline based on CVT algorithm
66 * @hdisplay: hdisplay size
67 * @vdisplay: vdisplay size
68 * @vrefresh : vrefresh rate
69 * @reduced : Whether the GTF calculation is simplified
70 * @interlaced:Whether the interlace is supported
75 * return the modeline based on CVT algorithm
77 * This function is called to generate the modeline based on CVT algorithm
78 * according to the hdisplay, vdisplay, vrefresh.
79 * It is based from the VESA(TM) Coordinated Video Timing Generator by
80 * Graham Loveridge April 9, 2003 available at
81 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
83 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
84 * What I have done is to translate it by using integer calculation.
86 #define HV_FACTOR 1000
87 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
88 int vdisplay, int vrefresh,
89 bool reduced, bool interlaced, bool margins)
91 /* 1) top/bottom margin size (% of height) - default: 1.8, */
92 #define CVT_MARGIN_PERCENTAGE 18
93 /* 2) character cell horizontal granularity (pixels) - default 8 */
94 #define CVT_H_GRANULARITY 8
95 /* 3) Minimum vertical porch (lines) - default 3 */
96 #define CVT_MIN_V_PORCH 3
97 /* 4) Minimum number of vertical back porch lines - default 6 */
98 #define CVT_MIN_V_BPORCH 6
99 /* Pixel Clock step (kHz) */
100 #define CVT_CLOCK_STEP 250
101 struct drm_display_mode *drm_mode;
102 unsigned int vfieldrate, hperiod;
103 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
106 /* allocate the drm_display_mode structure. If failure, we will
109 drm_mode = drm_mode_create(dev);
113 /* the CVT default refresh rate is 60Hz */
117 /* the required field fresh rate */
119 vfieldrate = vrefresh * 2;
121 vfieldrate = vrefresh;
123 /* horizontal pixels */
124 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
126 /* determine the left&right borders */
129 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
130 hmargin -= hmargin % CVT_H_GRANULARITY;
132 /* find the total active pixels */
133 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
135 /* find the number of lines per field */
137 vdisplay_rnd = vdisplay / 2;
139 vdisplay_rnd = vdisplay;
141 /* find the top & bottom borders */
144 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
146 drm_mode->vdisplay = vdisplay + 2 * vmargin;
154 /* Determine VSync Width from aspect ratio */
155 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
157 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
159 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
161 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
163 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
169 /* simplify the GTF calculation */
170 /* 4) Minimum time of vertical sync + back porch interval (µs)
174 #define CVT_MIN_VSYNC_BP 550
175 /* 3) Nominal HSync width (% of line period) - default 8 */
176 #define CVT_HSYNC_PERCENTAGE 8
177 unsigned int hblank_percentage;
178 int vsyncandback_porch, vback_porch, hblank;
180 /* estimated the horizontal period */
181 tmp1 = HV_FACTOR * 1000000 -
182 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
183 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
185 hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
187 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
188 /* 9. Find number of lines in sync + backporch */
189 if (tmp1 < (vsync + CVT_MIN_V_PORCH))
190 vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
192 vsyncandback_porch = tmp1;
193 /* 10. Find number of lines in back porch */
194 vback_porch = vsyncandback_porch - vsync;
195 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
196 vsyncandback_porch + CVT_MIN_V_PORCH;
197 /* 5) Definition of Horizontal blanking time limitation */
198 /* Gradient (%/kHz) - default 600 */
199 #define CVT_M_FACTOR 600
200 /* Offset (%) - default 40 */
201 #define CVT_C_FACTOR 40
202 /* Blanking time scaling factor - default 128 */
203 #define CVT_K_FACTOR 128
204 /* Scaling factor weighting - default 20 */
205 #define CVT_J_FACTOR 20
206 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
207 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
209 /* 12. Find ideal blanking duty cycle from formula */
210 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
212 /* 13. Blanking time */
213 if (hblank_percentage < 20 * HV_FACTOR)
214 hblank_percentage = 20 * HV_FACTOR;
215 hblank = drm_mode->hdisplay * hblank_percentage /
216 (100 * HV_FACTOR - hblank_percentage);
217 hblank -= hblank % (2 * CVT_H_GRANULARITY);
218 /* 14. find the total pixes per line */
219 drm_mode->htotal = drm_mode->hdisplay + hblank;
220 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
221 drm_mode->hsync_start = drm_mode->hsync_end -
222 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
223 drm_mode->hsync_start += CVT_H_GRANULARITY -
224 drm_mode->hsync_start % CVT_H_GRANULARITY;
225 /* fill the Vsync values */
226 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
227 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
229 /* Reduced blanking */
230 /* Minimum vertical blanking interval time (µs)- default 460 */
231 #define CVT_RB_MIN_VBLANK 460
232 /* Fixed number of clocks for horizontal sync */
233 #define CVT_RB_H_SYNC 32
234 /* Fixed number of clocks for horizontal blanking */
235 #define CVT_RB_H_BLANK 160
236 /* Fixed number of lines for vertical front porch - default 3*/
237 #define CVT_RB_VFPORCH 3
240 /* 8. Estimate Horizontal period. */
241 tmp1 = HV_FACTOR * 1000000 -
242 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
243 tmp2 = vdisplay_rnd + 2 * vmargin;
244 hperiod = tmp1 / (tmp2 * vfieldrate);
245 /* 9. Find number of lines in vertical blanking */
246 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
247 /* 10. Check if vertical blanking is sufficient */
248 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
249 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
250 /* 11. Find total number of lines in vertical field */
251 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
252 /* 12. Find total number of pixels in a line */
253 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
254 /* Fill in HSync values */
255 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
256 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
257 /* Fill in VSync values */
258 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
259 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
261 /* 15/13. Find pixel clock frequency (kHz for xf86) */
262 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod;
263 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP;
264 /* 18/16. Find actual vertical frame frequency */
265 /* ignore - just set the mode flag for interlaced */
267 drm_mode->vtotal *= 2;
268 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
270 /* Fill the mode line name */
271 drm_mode_set_name(drm_mode);
273 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
274 DRM_MODE_FLAG_NVSYNC);
276 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
277 DRM_MODE_FLAG_NHSYNC);
283 * drm_gtf_mode_complex - create the modeline based on full GTF algorithm
286 * @hdisplay :hdisplay size
287 * @vdisplay :vdisplay size
288 * @vrefresh :vrefresh rate.
289 * @interlaced :whether the interlace is supported
290 * @margins :desired margin size
291 * @GTF_[MCKJ] :extended GTF formula parameters
296 * return the modeline based on full GTF algorithm.
298 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
299 * in here multiplied by two. For a C of 40, pass in 80.
301 struct drm_display_mode *
302 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
303 int vrefresh, bool interlaced, int margins,
304 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
305 { /* 1) top/bottom margin size (% of height) - default: 1.8, */
306 #define GTF_MARGIN_PERCENTAGE 18
307 /* 2) character cell horizontal granularity (pixels) - default 8 */
308 #define GTF_CELL_GRAN 8
309 /* 3) Minimum vertical porch (lines) - default 3 */
310 #define GTF_MIN_V_PORCH 1
311 /* width of vsync in lines */
313 /* width of hsync as % of total line */
314 #define H_SYNC_PERCENT 8
315 /* min time of vsync + back porch (microsec) */
316 #define MIN_VSYNC_PLUS_BP 550
317 /* C' and M' are part of the Blanking Duty Cycle computation */
318 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
319 #define GTF_M_PRIME (GTF_K * GTF_M / 256)
320 struct drm_display_mode *drm_mode;
321 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
322 int top_margin, bottom_margin;
324 unsigned int hfreq_est;
325 int vsync_plus_bp, vback_porch;
326 unsigned int vtotal_lines, vfieldrate_est, hperiod;
327 unsigned int vfield_rate, vframe_rate;
328 int left_margin, right_margin;
329 unsigned int total_active_pixels, ideal_duty_cycle;
330 unsigned int hblank, total_pixels, pixel_freq;
331 int hsync, hfront_porch, vodd_front_porch_lines;
332 unsigned int tmp1, tmp2;
334 drm_mode = drm_mode_create(dev);
338 /* 1. In order to give correct results, the number of horizontal
339 * pixels requested is first processed to ensure that it is divisible
340 * by the character size, by rounding it to the nearest character
343 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
344 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
346 /* 2. If interlace is requested, the number of vertical lines assumed
347 * by the calculation must be halved, as the computation calculates
348 * the number of vertical lines per field.
351 vdisplay_rnd = vdisplay / 2;
353 vdisplay_rnd = vdisplay;
355 /* 3. Find the frame rate required: */
357 vfieldrate_rqd = vrefresh * 2;
359 vfieldrate_rqd = vrefresh;
361 /* 4. Find number of lines in Top margin: */
364 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
366 /* 5. Find number of lines in bottom margin: */
367 bottom_margin = top_margin;
369 /* 6. If interlace is required, then set variable interlace: */
375 /* 7. Estimate the Horizontal frequency */
377 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
378 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
380 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
383 /* 8. Find the number of lines in V sync + back porch */
384 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
385 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
386 vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
387 /* 9. Find the number of lines in V back porch alone: */
388 vback_porch = vsync_plus_bp - V_SYNC_RQD;
389 /* 10. Find the total number of lines in Vertical field period: */
390 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
391 vsync_plus_bp + GTF_MIN_V_PORCH;
392 /* 11. Estimate the Vertical field frequency: */
393 vfieldrate_est = hfreq_est / vtotal_lines;
394 /* 12. Find the actual horizontal period: */
395 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
397 /* 13. Find the actual Vertical field frequency: */
398 vfield_rate = hfreq_est / vtotal_lines;
399 /* 14. Find the Vertical frame frequency: */
401 vframe_rate = vfield_rate / 2;
403 vframe_rate = vfield_rate;
404 /* 15. Find number of pixels in left margin: */
406 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
411 /* 16.Find number of pixels in right margin: */
412 right_margin = left_margin;
413 /* 17.Find total number of active pixels in image and left and right */
414 total_active_pixels = hdisplay_rnd + left_margin + right_margin;
415 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
416 ideal_duty_cycle = GTF_C_PRIME * 1000 -
417 (GTF_M_PRIME * 1000000 / hfreq_est);
418 /* 19.Find the number of pixels in the blanking time to the nearest
419 * double character cell: */
420 hblank = total_active_pixels * ideal_duty_cycle /
421 (100000 - ideal_duty_cycle);
422 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
423 hblank = hblank * 2 * GTF_CELL_GRAN;
424 /* 20.Find total number of pixels: */
425 total_pixels = total_active_pixels + hblank;
426 /* 21.Find pixel clock frequency: */
427 pixel_freq = total_pixels * hfreq_est / 1000;
428 /* Stage 1 computations are now complete; I should really pass
429 * the results to another function and do the Stage 2 computations,
430 * but I only need a few more values so I'll just append the
431 * computations here for now */
432 /* 17. Find the number of pixels in the horizontal sync period: */
433 hsync = H_SYNC_PERCENT * total_pixels / 100;
434 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
435 hsync = hsync * GTF_CELL_GRAN;
436 /* 18. Find the number of pixels in horizontal front porch period */
437 hfront_porch = hblank / 2 - hsync;
438 /* 36. Find the number of lines in the odd front porch period: */
439 vodd_front_porch_lines = GTF_MIN_V_PORCH ;
441 /* finally, pack the results in the mode struct */
442 drm_mode->hdisplay = hdisplay_rnd;
443 drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
444 drm_mode->hsync_end = drm_mode->hsync_start + hsync;
445 drm_mode->htotal = total_pixels;
446 drm_mode->vdisplay = vdisplay_rnd;
447 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
448 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
449 drm_mode->vtotal = vtotal_lines;
451 drm_mode->clock = pixel_freq;
454 drm_mode->vtotal *= 2;
455 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
458 drm_mode_set_name(drm_mode);
459 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
460 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
462 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
468 * drm_gtf_mode - create the modeline based on GTF algorithm
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
480 * return the modeline based on GTF algorithm
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
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
492 * Standard GTF parameters:
498 struct drm_display_mode *
499 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
500 bool lace, int margins)
502 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, lace,
503 margins, 600, 40 * 2, 128, 20 * 2);
507 * drm_mode_set_name - set the name on a mode
508 * @mode: name will be set in this mode
513 * Set the name of @mode to a standard format.
515 void drm_mode_set_name(struct drm_display_mode *mode)
517 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
519 ksnprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
520 mode->hdisplay, mode->vdisplay,
521 interlaced ? "i" : "");
525 * drm_mode_list_concat - move modes from one list to another
530 * Caller must ensure both lists are locked.
532 * Move all the modes from @head to @new.
534 void drm_mode_list_concat(struct list_head *head, struct list_head *new)
537 struct list_head *entry, *tmp;
539 list_for_each_safe(entry, tmp, head) {
540 list_move_tail(entry, new);
545 * drm_mode_width - get the width of a mode
551 * Return @mode's width (hdisplay) value.
553 * FIXME: is this needed?
558 int drm_mode_width(const struct drm_display_mode *mode)
560 return mode->hdisplay;
563 EXPORT_SYMBOL(drm_mode_width);
566 * drm_mode_height - get the height of a mode
572 * Return @mode's height (vdisplay) value.
574 * FIXME: is this needed?
579 int drm_mode_height(const struct drm_display_mode *mode)
581 return mode->vdisplay;
583 EXPORT_SYMBOL(drm_mode_height);
585 /** drm_mode_hsync - get the hsync of a mode
591 * Return @modes's hsync rate in kHz, rounded to the nearest int.
593 int drm_mode_hsync(const struct drm_display_mode *mode)
595 unsigned int calc_val;
600 if (mode->htotal < 0)
603 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
604 calc_val += 500; /* round to 1000Hz */
605 calc_val /= 1000; /* truncate to kHz */
611 * drm_mode_vrefresh - get the vrefresh of a mode
617 * Return @mode's vrefresh rate in Hz or calculate it if necessary.
619 * FIXME: why is this needed? shouldn't vrefresh be set already?
622 * Vertical refresh rate. It will be the result of actual value plus 0.5.
623 * If it is 70.288, it will return 70Hz.
624 * If it is 59.6, it will return 60Hz.
626 int drm_mode_vrefresh(const struct drm_display_mode *mode)
629 unsigned int calc_val;
631 if (mode->vrefresh > 0)
632 refresh = mode->vrefresh;
633 else if (mode->htotal > 0 && mode->vtotal > 0) {
635 vtotal = mode->vtotal;
636 /* work out vrefresh the value will be x1000 */
637 calc_val = (mode->clock * 1000);
638 calc_val /= mode->htotal;
639 refresh = (calc_val + vtotal / 2) / vtotal;
641 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
643 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
646 refresh /= mode->vscan;
652 * drm_mode_set_crtcinfo - set CRTC modesetting parameters
654 * @adjust_flags: unused? (FIXME)
659 * Setup the CRTC modesetting parameters for @p, adjusting if necessary.
661 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
663 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
666 p->crtc_hdisplay = p->hdisplay;
667 p->crtc_hsync_start = p->hsync_start;
668 p->crtc_hsync_end = p->hsync_end;
669 p->crtc_htotal = p->htotal;
670 p->crtc_hskew = p->hskew;
671 p->crtc_vdisplay = p->vdisplay;
672 p->crtc_vsync_start = p->vsync_start;
673 p->crtc_vsync_end = p->vsync_end;
674 p->crtc_vtotal = p->vtotal;
676 if (p->flags & DRM_MODE_FLAG_INTERLACE) {
677 if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
678 p->crtc_vdisplay /= 2;
679 p->crtc_vsync_start /= 2;
680 p->crtc_vsync_end /= 2;
685 if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
686 p->crtc_vdisplay *= 2;
687 p->crtc_vsync_start *= 2;
688 p->crtc_vsync_end *= 2;
693 p->crtc_vdisplay *= p->vscan;
694 p->crtc_vsync_start *= p->vscan;
695 p->crtc_vsync_end *= p->vscan;
696 p->crtc_vtotal *= p->vscan;
699 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
700 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
701 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
702 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
704 EXPORT_SYMBOL(drm_mode_set_crtcinfo);
707 * drm_mode_duplicate - allocate and duplicate an existing mode
708 * @m: mode to duplicate
713 * Just allocate a new mode, copy the existing mode into it, and return
714 * a pointer to it. Used to create new instances of established modes.
716 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
717 const struct drm_display_mode *mode)
719 struct drm_display_mode *nmode;
722 nmode = drm_mode_create(dev);
726 new_id = nmode->base.id;
728 nmode->base.id = new_id;
729 INIT_LIST_HEAD(&nmode->head);
734 * drm_mode_equal - test modes for equality
736 * @mode2: second mode
741 * Check to see if @mode1 and @mode2 are equivalent.
744 * True if the modes are equal, false otherwise.
746 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
748 /* do clock check convert to PICOS so fb modes get matched
750 if (mode1->clock && mode2->clock) {
751 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
753 } else if (mode1->clock != mode2->clock)
756 if (mode1->hdisplay == mode2->hdisplay &&
757 mode1->hsync_start == mode2->hsync_start &&
758 mode1->hsync_end == mode2->hsync_end &&
759 mode1->htotal == mode2->htotal &&
760 mode1->hskew == mode2->hskew &&
761 mode1->vdisplay == mode2->vdisplay &&
762 mode1->vsync_start == mode2->vsync_start &&
763 mode1->vsync_end == mode2->vsync_end &&
764 mode1->vtotal == mode2->vtotal &&
765 mode1->vscan == mode2->vscan &&
766 mode1->flags == mode2->flags)
771 EXPORT_SYMBOL(drm_mode_equal);
774 * drm_mode_validate_size - make sure modes adhere to size constraints
776 * @mode_list: list of modes to check
777 * @maxX: maximum width
778 * @maxY: maximum height
779 * @maxPitch: max pitch
782 * Caller must hold a lock protecting @mode_list.
784 * The DRM device (@dev) has size and pitch limits. Here we validate the
785 * modes we probed for @dev against those limits and set their status as
788 void drm_mode_validate_size(struct drm_device *dev,
789 struct list_head *mode_list,
790 int maxX, int maxY, int maxPitch)
792 struct drm_display_mode *mode;
794 list_for_each_entry(mode, mode_list, head) {
795 if (maxPitch > 0 && mode->hdisplay > maxPitch)
796 mode->status = MODE_BAD_WIDTH;
798 if (maxX > 0 && mode->hdisplay > maxX)
799 mode->status = MODE_VIRTUAL_X;
801 if (maxY > 0 && mode->vdisplay > maxY)
802 mode->status = MODE_VIRTUAL_Y;
807 * drm_mode_prune_invalid - remove invalid modes from mode list
809 * @mode_list: list of modes to check
810 * @verbose: be verbose about it
813 * Caller must hold a lock protecting @mode_list.
815 * Once mode list generation is complete, a caller can use this routine to
816 * remove invalid modes from a mode list. If any of the modes have a
817 * status other than %MODE_OK, they are removed from @mode_list and freed.
819 void drm_mode_prune_invalid(struct drm_device *dev,
820 struct list_head *mode_list, bool verbose)
822 struct drm_display_mode *mode, *t;
824 list_for_each_entry_safe(mode, t, mode_list, head) {
825 if (mode->status != MODE_OK) {
826 list_del(&mode->head);
828 drm_mode_debug_printmodeline(mode);
829 DRM_DEBUG_KMS("Not using %s mode %d\n",
830 mode->name, mode->status);
832 drm_mode_destroy(dev, mode);
838 * drm_mode_compare - compare modes for favorability
840 * @lh_a: list_head for first mode
841 * @lh_b: list_head for second mode
846 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
850 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
851 * positive if @lh_b is better than @lh_a.
853 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
855 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
856 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
859 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
860 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
863 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
866 diff = b->clock - a->clock;
871 * drm_mode_sort - sort mode list
872 * @mode_list: list to sort
875 * Caller must hold a lock protecting @mode_list.
877 * Sort @mode_list by favorability, putting good modes first.
879 void drm_mode_sort(struct list_head *mode_list)
881 drm_list_sort(NULL, mode_list, drm_mode_compare);
885 * drm_mode_connector_list_update - update the mode list for the connector
886 * @connector: the connector to update
889 * Caller must hold a lock protecting @mode_list.
891 * This moves the modes from the @connector probed_modes list
892 * to the actual mode list. It compares the probed mode against the current
893 * list and only adds different modes. All modes unverified after this point
894 * will be removed by the prune invalid modes.
896 void drm_mode_connector_list_update(struct drm_connector *connector)
898 struct drm_display_mode *mode;
899 struct drm_display_mode *pmode, *pt;
902 list_for_each_entry_safe(pmode, pt, &connector->probed_modes,
905 /* go through current modes checking for the new probed mode */
906 list_for_each_entry(mode, &connector->modes, head) {
907 if (drm_mode_equal(pmode, mode)) {
909 /* if equal delete the probed mode */
910 mode->status = pmode->status;
911 /* Merge type bits together */
912 mode->type |= pmode->type;
913 list_del(&pmode->head);
914 drm_mode_destroy(connector->dev, pmode);
920 list_move_tail(&pmode->head, &connector->modes);
926 * drm_mode_parse_command_line_for_connector - parse command line for connector
927 * @mode_option - per connector mode option
928 * @connector - connector to parse line for
930 * This parses the connector specific then generic command lines for
931 * modes and options to configure the connector.
933 * This uses the same parameters as the fb modedb.c, except for extra
934 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
936 * enable/enable Digital/disable bit at the end
938 bool drm_mode_parse_command_line_for_connector(const char *mode_option,
939 struct drm_connector *connector,
940 struct drm_cmdline_mode *mode)
943 unsigned int namelen;
944 bool res_specified = false, bpp_specified = false, refresh_specified = false;
945 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
946 bool yres_specified = false, cvt = false, rb = false;
947 bool interlace = false, margins = false, was_digit = false;
949 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
953 mode_option = fb_mode_option;
957 mode->specified = false;
962 namelen = strlen(name);
963 for (i = namelen-1; i >= 0; i--) {
966 if (!refresh_specified && !bpp_specified &&
967 !yres_specified && !cvt && !rb && was_digit) {
968 refresh = strtol(&name[i+1], NULL, 10);
969 refresh_specified = true;
975 if (!bpp_specified && !yres_specified && !cvt &&
977 bpp = strtol(&name[i+1], NULL, 10);
978 bpp_specified = true;
984 if (!yres_specified && was_digit) {
985 yres = strtol(&name[i+1], NULL, 10);
986 yres_specified = true;
994 if (yres_specified || cvt || was_digit)
999 if (yres_specified || cvt || rb || was_digit)
1004 if (cvt || yres_specified || was_digit)
1009 if (cvt || yres_specified || was_digit)
1014 if (yres_specified || bpp_specified || refresh_specified ||
1015 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1018 force = DRM_FORCE_ON;
1021 if (yres_specified || bpp_specified || refresh_specified ||
1022 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1025 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1026 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1027 force = DRM_FORCE_ON;
1029 force = DRM_FORCE_ON_DIGITAL;
1032 if (yres_specified || bpp_specified || refresh_specified ||
1033 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1036 force = DRM_FORCE_OFF;
1043 if (i < 0 && yres_specified) {
1045 xres = strtol(name, &ch, 10);
1046 if ((ch != NULL) && (*ch == 'x'))
1047 res_specified = true;
1050 } else if (!yres_specified && was_digit) {
1051 /* catch mode that begins with digits but has no 'x' */
1056 kprintf("parse error at position %i in video mode '%s'\n",
1058 mode->specified = false;
1062 if (res_specified) {
1063 mode->specified = true;
1068 if (refresh_specified) {
1069 mode->refresh_specified = true;
1070 mode->refresh = refresh;
1073 if (bpp_specified) {
1074 mode->bpp_specified = true;
1079 mode->interlace = interlace;
1080 mode->margins = margins;
1081 mode->force = force;
1086 struct drm_display_mode *
1087 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1088 struct drm_cmdline_mode *cmd)
1090 struct drm_display_mode *mode;
1093 mode = drm_cvt_mode(dev,
1094 cmd->xres, cmd->yres,
1095 cmd->refresh_specified ? cmd->refresh : 60,
1096 cmd->rb, cmd->interlace,
1099 mode = drm_gtf_mode(dev,
1100 cmd->xres, cmd->yres,
1101 cmd->refresh_specified ? cmd->refresh : 60,
1107 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);