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).
33 #include <linux/list.h>
34 #include <linux/list_sort.h>
35 #include <linux/export.h>
37 #include <drm/drm_crtc.h>
38 #include <video/of_videomode.h>
39 #include <video/videomode.h>
40 #include <drm/drm_modes.h>
42 #include "drm_crtc_internal.h"
45 * drm_mode_debug_printmodeline - print a mode to dmesg
46 * @mode: mode to print
48 * Describe @mode using DRM_DEBUG.
50 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
52 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
54 EXPORT_SYMBOL(drm_mode_debug_printmodeline);
57 * drm_mode_create - create a new display mode
60 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it
64 * Pointer to new mode on success, NULL on error.
66 struct drm_display_mode *drm_mode_create(struct drm_device *dev)
68 struct drm_display_mode *nmode;
70 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
74 if (drm_mode_object_add(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
81 EXPORT_SYMBOL(drm_mode_create);
84 * drm_mode_destroy - remove a mode
86 * @mode: mode to remove
88 * Release @mode's unique ID, then free it @mode structure itself using kfree.
90 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
95 drm_mode_object_unregister(dev, &mode->base);
99 EXPORT_SYMBOL(drm_mode_destroy);
102 * drm_mode_probed_add - add a mode to a connector's probed_mode list
103 * @connector: connector the new mode
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.
110 void drm_mode_probed_add(struct drm_connector *connector,
111 struct drm_display_mode *mode)
113 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
115 list_add_tail(&mode->head, &connector->probed_modes);
117 EXPORT_SYMBOL(drm_mode_probed_add);
120 * drm_cvt_mode -create a modeline based on the CVT algorithm
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)
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
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.
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.
143 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
144 int vdisplay, int vrefresh,
145 bool reduced, bool interlaced, bool margins)
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;
164 /* allocate the drm_display_mode structure. If failure, we will
167 drm_mode = drm_mode_create(dev);
171 /* the CVT default refresh rate is 60Hz */
175 /* the required field fresh rate */
177 vfieldrate = vrefresh * 2;
179 vfieldrate = vrefresh;
181 /* horizontal pixels */
182 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
184 /* determine the left&right borders */
187 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
188 hmargin -= hmargin % CVT_H_GRANULARITY;
190 /* find the total active pixels */
191 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
193 /* find the number of lines per field */
195 vdisplay_rnd = vdisplay / 2;
197 vdisplay_rnd = vdisplay;
199 /* find the top & bottom borders */
202 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
204 drm_mode->vdisplay = vdisplay + 2 * vmargin;
212 /* Determine VSync Width from aspect ratio */
213 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
215 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
217 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
219 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
221 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
227 /* simplify the GTF calculation */
228 /* 4) Minimum time of vertical sync + back porch interval (µs)
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;
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 +
243 hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
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;
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 + \
267 /* 12. Find ideal blanking duty cycle from formula */
268 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
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;
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
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;
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 */
328 drm_mode->vtotal *= 2;
329 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
331 /* Fill the mode line name */
332 drm_mode_set_name(drm_mode);
334 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
335 DRM_MODE_FLAG_NVSYNC);
337 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
338 DRM_MODE_FLAG_NHSYNC);
342 EXPORT_SYMBOL(drm_cvt_mode);
345 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm
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
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.
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.
365 struct drm_display_mode *
366 drm_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 */
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;
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;
398 drm_mode = drm_mode_create(dev);
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
407 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
408 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
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.
415 vdisplay_rnd = vdisplay / 2;
417 vdisplay_rnd = vdisplay;
419 /* 3. Find the frame rate required: */
421 vfieldrate_rqd = vrefresh * 2;
423 vfieldrate_rqd = vrefresh;
425 /* 4. Find number of lines in Top margin: */
428 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
430 /* 5. Find number of lines in bottom margin: */
431 bottom_margin = top_margin;
433 /* 6. If interlace is required, then set variable interlace: */
439 /* 7. Estimate the Horizontal frequency */
441 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
442 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
444 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
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);
461 /* 13. Find the actual Vertical field frequency: */
462 vfield_rate = hfreq_est / vtotal_lines;
463 /* 14. Find the Vertical frame frequency: */
465 vframe_rate = vfield_rate / 2;
467 vframe_rate = vfield_rate;
468 /* 15. Find number of pixels in left margin: */
470 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
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 ;
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;
515 drm_mode->clock = pixel_freq;
518 drm_mode->vtotal *= 2;
519 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
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;
526 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
530 EXPORT_SYMBOL(drm_gtf_mode_complex);
533 * drm_gtf_mode - create the modeline based on the GTF algorithm
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
541 * return the modeline based on GTF algorithm
543 * This function is to create the modeline based on the GTF algorithm.
544 * Generalized Timing Formula is derived from:
546 * GTF Spreadsheet by Andy Morrish (1/5/97)
547 * available at http://www.vesa.org
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
554 * Standard GTF parameters::
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.
566 struct drm_display_mode *
567 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
568 bool interlaced, int margins)
570 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh,
572 600, 40 * 2, 128, 20 * 2);
574 EXPORT_SYMBOL(drm_gtf_mode);
576 #ifdef CONFIG_VIDEOMODE_HELPERS
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
582 * Fills out @dmode using the display mode specified in @vm.
584 void drm_display_mode_from_videomode(const struct videomode *vm,
585 struct drm_display_mode *dmode)
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;
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;
597 dmode->clock = vm->pixelclock / 1000;
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);
616 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
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
623 * Fills out @vm using the display mode specified in @dmode.
625 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
626 struct videomode *vm)
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;
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;
638 vm->pixelclock = dmode->clock * 1000;
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;
656 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
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
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
667 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags)
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;
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;
680 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
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
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.
695 * 0 on success, a negative errno code when no of videomode node was found.
697 int of_get_drm_display_mode(struct device_node *np,
698 struct drm_display_mode *dmode, u32 *bus_flags,
704 ret = of_get_videomode(np, &vm, index);
708 drm_display_mode_from_videomode(&vm, dmode);
710 drm_bus_flags_from_videomode(&vm, bus_flags);
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);
718 EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
719 #endif /* CONFIG_OF */
720 #endif /* CONFIG_VIDEOMODE_HELPERS */
723 * drm_mode_set_name - set the name on a mode
724 * @mode: name will be set in this mode
726 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay>
727 * with an optional 'i' suffix for interlaced modes.
729 void drm_mode_set_name(struct drm_display_mode *mode)
731 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
733 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
734 mode->hdisplay, mode->vdisplay,
735 interlaced ? "i" : "");
737 EXPORT_SYMBOL(drm_mode_set_name);
740 * drm_mode_hsync - get the hsync of a mode
744 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the
745 * value first if it is not yet set.
747 int drm_mode_hsync(const struct drm_display_mode *mode)
749 unsigned int calc_val;
754 if (mode->htotal < 0)
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 */
763 EXPORT_SYMBOL(drm_mode_hsync);
766 * drm_mode_vrefresh - get the vrefresh of a mode
770 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the
771 * value first if it is not yet set.
773 int drm_mode_vrefresh(const struct drm_display_mode *mode)
776 unsigned int calc_val;
778 if (mode->vrefresh > 0)
779 refresh = mode->vrefresh;
780 else if (mode->htotal > 0 && mode->vtotal > 0) {
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;
788 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
790 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
793 refresh /= mode->vscan;
797 EXPORT_SYMBOL(drm_mode_vrefresh);
800 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode
801 * @mode: mode to query
802 * @hdisplay: hdisplay value to fill in
803 * @vdisplay: vdisplay value to fill in
805 * The vdisplay value will be doubled if the specified mode is a stereo mode of
806 * the appropriate layout.
808 void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
809 int *hdisplay, int *vdisplay)
811 struct drm_display_mode adjusted = *mode;
813 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
814 *hdisplay = adjusted.crtc_hdisplay;
815 *vdisplay = adjusted.crtc_vdisplay;
817 EXPORT_SYMBOL(drm_mode_get_hv_timing);
820 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
822 * @adjust_flags: a combination of adjustment flags
824 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
826 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
828 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
829 * buffers containing two eyes (only adjust the timings when needed, eg. for
830 * "frame packing" or "side by side full").
831 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not*
832 * be performed for doublescan and vscan > 1 modes respectively.
834 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
836 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
839 p->crtc_clock = p->clock;
840 p->crtc_hdisplay = p->hdisplay;
841 p->crtc_hsync_start = p->hsync_start;
842 p->crtc_hsync_end = p->hsync_end;
843 p->crtc_htotal = p->htotal;
844 p->crtc_hskew = p->hskew;
845 p->crtc_vdisplay = p->vdisplay;
846 p->crtc_vsync_start = p->vsync_start;
847 p->crtc_vsync_end = p->vsync_end;
848 p->crtc_vtotal = p->vtotal;
850 if (p->flags & DRM_MODE_FLAG_INTERLACE) {
851 if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
852 p->crtc_vdisplay /= 2;
853 p->crtc_vsync_start /= 2;
854 p->crtc_vsync_end /= 2;
859 if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
860 if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
861 p->crtc_vdisplay *= 2;
862 p->crtc_vsync_start *= 2;
863 p->crtc_vsync_end *= 2;
868 if (!(adjust_flags & CRTC_NO_VSCAN)) {
870 p->crtc_vdisplay *= p->vscan;
871 p->crtc_vsync_start *= p->vscan;
872 p->crtc_vsync_end *= p->vscan;
873 p->crtc_vtotal *= p->vscan;
877 if (adjust_flags & CRTC_STEREO_DOUBLE) {
878 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
881 case DRM_MODE_FLAG_3D_FRAME_PACKING:
883 p->crtc_vdisplay += p->crtc_vtotal;
884 p->crtc_vsync_start += p->crtc_vtotal;
885 p->crtc_vsync_end += p->crtc_vtotal;
886 p->crtc_vtotal += p->crtc_vtotal;
891 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
892 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
893 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
894 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
896 EXPORT_SYMBOL(drm_mode_set_crtcinfo);
899 * drm_mode_copy - copy the mode
900 * @dst: mode to overwrite
903 * Copy an existing mode into another mode, preserving the object id and
904 * list head of the destination mode.
906 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
908 int id = dst->base.id;
909 struct list_head head = dst->head;
915 EXPORT_SYMBOL(drm_mode_copy);
918 * drm_mode_duplicate - allocate and duplicate an existing mode
919 * @dev: drm_device to allocate the duplicated mode for
920 * @mode: mode to duplicate
922 * Just allocate a new mode, copy the existing mode into it, and return
923 * a pointer to it. Used to create new instances of established modes.
926 * Pointer to duplicated mode on success, NULL on error.
928 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
929 const struct drm_display_mode *mode)
931 struct drm_display_mode *nmode;
933 nmode = drm_mode_create(dev);
937 drm_mode_copy(nmode, mode);
941 EXPORT_SYMBOL(drm_mode_duplicate);
944 * drm_mode_equal - test modes for equality
946 * @mode2: second mode
948 * Check to see if @mode1 and @mode2 are equivalent.
951 * True if the modes are equal, false otherwise.
953 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
955 if (!mode1 && !mode2)
958 if (!mode1 || !mode2)
961 /* do clock check convert to PICOS so fb modes get matched
963 if (mode1->clock && mode2->clock) {
964 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
966 } else if (mode1->clock != mode2->clock)
969 return drm_mode_equal_no_clocks(mode1, mode2);
971 EXPORT_SYMBOL(drm_mode_equal);
974 * drm_mode_equal_no_clocks - test modes for equality
976 * @mode2: second mode
978 * Check to see if @mode1 and @mode2 are equivalent, but
979 * don't check the pixel clocks.
982 * True if the modes are equal, false otherwise.
984 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
986 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) !=
987 (mode2->flags & DRM_MODE_FLAG_3D_MASK))
990 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2);
992 EXPORT_SYMBOL(drm_mode_equal_no_clocks);
995 * drm_mode_equal_no_clocks_no_stereo - test modes for equality
997 * @mode2: second mode
999 * Check to see if @mode1 and @mode2 are equivalent, but
1000 * don't check the pixel clocks nor the stereo layout.
1003 * True if the modes are equal, false otherwise.
1005 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
1006 const struct drm_display_mode *mode2)
1008 if (mode1->hdisplay == mode2->hdisplay &&
1009 mode1->hsync_start == mode2->hsync_start &&
1010 mode1->hsync_end == mode2->hsync_end &&
1011 mode1->htotal == mode2->htotal &&
1012 mode1->hskew == mode2->hskew &&
1013 mode1->vdisplay == mode2->vdisplay &&
1014 mode1->vsync_start == mode2->vsync_start &&
1015 mode1->vsync_end == mode2->vsync_end &&
1016 mode1->vtotal == mode2->vtotal &&
1017 mode1->vscan == mode2->vscan &&
1018 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
1019 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK))
1024 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
1027 * drm_mode_validate_basic - make sure the mode is somewhat sane
1028 * @mode: mode to check
1030 * Check that the mode timings are at least somewhat reasonable.
1031 * Any hardware specific limits are left up for each driver to check.
1036 enum drm_mode_status
1037 drm_mode_validate_basic(const struct drm_display_mode *mode)
1039 if (mode->clock == 0)
1040 return MODE_CLOCK_LOW;
1042 if (mode->hdisplay == 0 ||
1043 mode->hsync_start < mode->hdisplay ||
1044 mode->hsync_end < mode->hsync_start ||
1045 mode->htotal < mode->hsync_end)
1046 return MODE_H_ILLEGAL;
1048 if (mode->vdisplay == 0 ||
1049 mode->vsync_start < mode->vdisplay ||
1050 mode->vsync_end < mode->vsync_start ||
1051 mode->vtotal < mode->vsync_end)
1052 return MODE_V_ILLEGAL;
1056 EXPORT_SYMBOL(drm_mode_validate_basic);
1059 * drm_mode_validate_size - make sure modes adhere to size constraints
1060 * @mode: mode to check
1061 * @maxX: maximum width
1062 * @maxY: maximum height
1064 * This function is a helper which can be used to validate modes against size
1065 * limitations of the DRM device/connector. If a mode is too big its status
1066 * member is updated with the appropriate validation failure code. The list
1067 * itself is not changed.
1072 enum drm_mode_status
1073 drm_mode_validate_size(const struct drm_display_mode *mode,
1076 if (maxX > 0 && mode->hdisplay > maxX)
1077 return MODE_VIRTUAL_X;
1079 if (maxY > 0 && mode->vdisplay > maxY)
1080 return MODE_VIRTUAL_Y;
1084 EXPORT_SYMBOL(drm_mode_validate_size);
1086 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status
1088 static const char * const drm_mode_status_names[] = {
1092 MODE_STATUS(H_ILLEGAL),
1093 MODE_STATUS(V_ILLEGAL),
1094 MODE_STATUS(BAD_WIDTH),
1095 MODE_STATUS(NOMODE),
1096 MODE_STATUS(NO_INTERLACE),
1097 MODE_STATUS(NO_DBLESCAN),
1098 MODE_STATUS(NO_VSCAN),
1100 MODE_STATUS(VIRTUAL_X),
1101 MODE_STATUS(VIRTUAL_Y),
1102 MODE_STATUS(MEM_VIRT),
1103 MODE_STATUS(NOCLOCK),
1104 MODE_STATUS(CLOCK_HIGH),
1105 MODE_STATUS(CLOCK_LOW),
1106 MODE_STATUS(CLOCK_RANGE),
1107 MODE_STATUS(BAD_HVALUE),
1108 MODE_STATUS(BAD_VVALUE),
1109 MODE_STATUS(BAD_VSCAN),
1110 MODE_STATUS(HSYNC_NARROW),
1111 MODE_STATUS(HSYNC_WIDE),
1112 MODE_STATUS(HBLANK_NARROW),
1113 MODE_STATUS(HBLANK_WIDE),
1114 MODE_STATUS(VSYNC_NARROW),
1115 MODE_STATUS(VSYNC_WIDE),
1116 MODE_STATUS(VBLANK_NARROW),
1117 MODE_STATUS(VBLANK_WIDE),
1119 MODE_STATUS(INTERLACE_WIDTH),
1120 MODE_STATUS(ONE_WIDTH),
1121 MODE_STATUS(ONE_HEIGHT),
1122 MODE_STATUS(ONE_SIZE),
1123 MODE_STATUS(NO_REDUCED),
1124 MODE_STATUS(NO_STEREO),
1132 static const char *drm_get_mode_status_name(enum drm_mode_status status)
1134 int index = status + 3;
1136 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names)))
1139 return drm_mode_status_names[index];
1143 * drm_mode_prune_invalid - remove invalid modes from mode list
1145 * @mode_list: list of modes to check
1146 * @verbose: be verbose about it
1148 * This helper function can be used to prune a display mode list after
1149 * validation has been completed. All modes who's status is not MODE_OK will be
1150 * removed from the list, and if @verbose the status code and mode name is also
1153 void drm_mode_prune_invalid(struct drm_device *dev,
1154 struct list_head *mode_list, bool verbose)
1156 struct drm_display_mode *mode, *t;
1158 list_for_each_entry_safe(mode, t, mode_list, head) {
1159 if (mode->status != MODE_OK) {
1160 list_del(&mode->head);
1162 drm_mode_debug_printmodeline(mode);
1163 DRM_DEBUG_KMS("Not using %s mode: %s\n",
1165 drm_get_mode_status_name(mode->status));
1167 drm_mode_destroy(dev, mode);
1171 EXPORT_SYMBOL(drm_mode_prune_invalid);
1174 * drm_mode_compare - compare modes for favorability
1176 * @lh_a: list_head for first mode
1177 * @lh_b: list_head for second mode
1179 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
1183 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
1184 * positive if @lh_b is better than @lh_a.
1186 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
1188 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
1189 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
1192 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
1193 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
1196 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
1200 diff = b->vrefresh - a->vrefresh;
1204 diff = b->clock - a->clock;
1209 * drm_mode_sort - sort mode list
1210 * @mode_list: list of drm_display_mode structures to sort
1212 * Sort @mode_list by favorability, moving good modes to the head of the list.
1214 void drm_mode_sort(struct list_head *mode_list)
1216 list_sort(NULL, mode_list, drm_mode_compare);
1218 EXPORT_SYMBOL(drm_mode_sort);
1221 * drm_mode_connector_list_update - update the mode list for the connector
1222 * @connector: the connector to update
1224 * This moves the modes from the @connector probed_modes list
1225 * to the actual mode list. It compares the probed mode against the current
1226 * list and only adds different/new modes.
1228 * This is just a helper functions doesn't validate any modes itself and also
1229 * doesn't prune any invalid modes. Callers need to do that themselves.
1231 void drm_mode_connector_list_update(struct drm_connector *connector)
1233 struct drm_display_mode *pmode, *pt;
1235 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
1237 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) {
1238 struct drm_display_mode *mode;
1239 bool found_it = false;
1241 /* go through current modes checking for the new probed mode */
1242 list_for_each_entry(mode, &connector->modes, head) {
1243 if (!drm_mode_equal(pmode, mode))
1249 * If the old matching mode is stale (ie. left over
1250 * from a previous probe) just replace it outright.
1251 * Otherwise just merge the type bits between all
1252 * equal probed modes.
1254 * If two probed modes are considered equal, pick the
1255 * actual timings from the one that's marked as
1256 * preferred (in case the match isn't 100%). If
1257 * multiple or zero preferred modes are present, favor
1258 * the mode added to the probed_modes list first.
1260 if (mode->status == MODE_STALE) {
1261 drm_mode_copy(mode, pmode);
1262 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 &&
1263 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) {
1264 pmode->type |= mode->type;
1265 drm_mode_copy(mode, pmode);
1267 mode->type |= pmode->type;
1270 list_del(&pmode->head);
1271 drm_mode_destroy(connector->dev, pmode);
1276 list_move_tail(&pmode->head, &connector->modes);
1280 EXPORT_SYMBOL(drm_mode_connector_list_update);
1283 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector
1284 * @mode_option: optional per connector mode option
1285 * @connector: connector to parse modeline for
1286 * @mode: preallocated drm_cmdline_mode structure to fill out
1288 * This parses @mode_option command line modeline for modes and options to
1289 * configure the connector. If @mode_option is NULL the default command line
1290 * modeline in fb_mode_option will be parsed instead.
1292 * This uses the same parameters as the fb modedb.c, except for an extra
1293 * force-enable, force-enable-digital and force-disable bit at the end:
1295 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
1297 * The intermediate drm_cmdline_mode structure is required to store additional
1298 * options from the command line modline like the force-enable/disable flag.
1301 * True if a valid modeline has been parsed, false otherwise.
1303 bool drm_mode_parse_command_line_for_connector(const char *mode_option,
1304 struct drm_connector *connector,
1305 struct drm_cmdline_mode *mode)
1308 unsigned int namelen;
1309 bool res_specified = false, bpp_specified = false, refresh_specified = false;
1310 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
1311 bool yres_specified = false, cvt = false, rb = false;
1312 bool interlace = false, margins = false, was_digit = false;
1314 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
1318 mode_option = fb_mode_option;
1322 mode->specified = false;
1327 namelen = strlen(name);
1328 for (i = namelen-1; i >= 0; i--) {
1331 if (!refresh_specified && !bpp_specified &&
1332 !yres_specified && !cvt && !rb && was_digit) {
1333 refresh = simple_strtol(&name[i+1], NULL, 10);
1334 refresh_specified = true;
1340 if (!bpp_specified && !yres_specified && !cvt &&
1342 bpp = simple_strtol(&name[i+1], NULL, 10);
1343 bpp_specified = true;
1349 if (!yres_specified && was_digit) {
1350 yres = simple_strtol(&name[i+1], NULL, 10);
1351 yres_specified = true;
1360 if (yres_specified || cvt || was_digit)
1365 if (yres_specified || cvt || rb || was_digit)
1370 if (cvt || yres_specified || was_digit)
1375 if (cvt || yres_specified || was_digit)
1380 if (yres_specified || bpp_specified || refresh_specified ||
1381 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1384 force = DRM_FORCE_ON;
1387 if (yres_specified || bpp_specified || refresh_specified ||
1388 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1391 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1392 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1393 force = DRM_FORCE_ON;
1395 force = DRM_FORCE_ON_DIGITAL;
1398 if (yres_specified || bpp_specified || refresh_specified ||
1399 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1402 force = DRM_FORCE_OFF;
1409 if (i < 0 && yres_specified) {
1411 xres = simple_strtol(name, &ch, 10);
1412 if ((ch != NULL) && (*ch == 'x'))
1413 res_specified = true;
1416 } else if (!yres_specified && was_digit) {
1417 /* catch mode that begins with digits but has no 'x' */
1422 pr_warn("[drm] parse error at position %i in video mode '%s'\n",
1424 mode->specified = false;
1428 if (res_specified) {
1429 mode->specified = true;
1434 if (refresh_specified) {
1435 mode->refresh_specified = true;
1436 mode->refresh = refresh;
1439 if (bpp_specified) {
1440 mode->bpp_specified = true;
1445 mode->interlace = interlace;
1446 mode->margins = margins;
1447 mode->force = force;
1451 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
1454 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
1455 * @dev: DRM device to create the new mode for
1456 * @cmd: input command line modeline
1459 * Pointer to converted mode on success, NULL on error.
1461 struct drm_display_mode *
1462 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1463 struct drm_cmdline_mode *cmd)
1465 struct drm_display_mode *mode;
1468 mode = drm_cvt_mode(dev,
1469 cmd->xres, cmd->yres,
1470 cmd->refresh_specified ? cmd->refresh : 60,
1471 cmd->rb, cmd->interlace,
1474 mode = drm_gtf_mode(dev,
1475 cmd->xres, cmd->yres,
1476 cmd->refresh_specified ? cmd->refresh : 60,
1482 mode->type |= DRM_MODE_TYPE_USERDEF;
1483 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */
1484 if (cmd->xres == 1366)
1485 drm_mode_fixup_1366x768(mode);
1486 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1489 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);
1492 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1493 * @out: drm_mode_modeinfo struct to return to the user
1494 * @in: drm_display_mode to use
1496 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1499 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
1500 const struct drm_display_mode *in)
1502 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1503 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1504 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1505 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1506 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1507 "timing values too large for mode info\n");
1509 out->clock = in->clock;
1510 out->hdisplay = in->hdisplay;
1511 out->hsync_start = in->hsync_start;
1512 out->hsync_end = in->hsync_end;
1513 out->htotal = in->htotal;
1514 out->hskew = in->hskew;
1515 out->vdisplay = in->vdisplay;
1516 out->vsync_start = in->vsync_start;
1517 out->vsync_end = in->vsync_end;
1518 out->vtotal = in->vtotal;
1519 out->vscan = in->vscan;
1520 out->vrefresh = in->vrefresh;
1521 out->flags = in->flags;
1522 out->type = in->type;
1523 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1524 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1528 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
1529 * @out: drm_display_mode to return to the user
1530 * @in: drm_mode_modeinfo to use
1532 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1536 * Zero on success, negative errno on failure.
1538 int drm_mode_convert_umode(struct drm_display_mode *out,
1539 const struct drm_mode_modeinfo *in)
1543 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) {
1548 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
1551 out->clock = in->clock;
1552 out->hdisplay = in->hdisplay;
1553 out->hsync_start = in->hsync_start;
1554 out->hsync_end = in->hsync_end;
1555 out->htotal = in->htotal;
1556 out->hskew = in->hskew;
1557 out->vdisplay = in->vdisplay;
1558 out->vsync_start = in->vsync_start;
1559 out->vsync_end = in->vsync_end;
1560 out->vtotal = in->vtotal;
1561 out->vscan = in->vscan;
1562 out->vrefresh = in->vrefresh;
1563 out->flags = in->flags;
1564 out->type = in->type;
1565 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1566 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1568 out->status = drm_mode_validate_basic(out);
1569 if (out->status != MODE_OK)
1572 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V);