1/*
2 * Copyright © 1997-2003 by The XFree86 Project, Inc.
3 * Copyright © 2007 Dave Airlie
4 * Copyright © 2007-2008 Intel Corporation
5 * Jesse Barnes <jesse.barnes@intel.com>
6 * Copyright 2005-2006 Luc Verhaegen
7 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 *
27 * Except as contained in this notice, the name of the copyright holder(s)
28 * and author(s) shall not be used in advertising or otherwise to promote
29 * the sale, use or other dealings in this Software without prior written
30 * authorization from the copyright holder(s) and author(s).
31 */
32
33#include <linux/list.h>
34#include <linux/list_sort.h>
35#include <linux/export.h>
36#include <drm/drmP.h>
37#include <drm/drm_crtc.h>
38#ifdef CONFIG_VIDEOMODE_HELPERS
39#ifdef CONFIG_OF
40#include <video/of_videomode.h>
41#endif
42#include <video/videomode.h>
43#endif
44#include <drm/drm_modes.h>
45
46#include "drm_crtc_internal.h"
47
48/**
49 * drm_mode_debug_printmodeline - print a mode to dmesg
50 * @mode: mode to print
51 *
52 * Describe @mode using DRM_DEBUG.
53 */
54void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
55{
56 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d "
57 "0x%x 0x%x\n",
58 mode->base.id, mode->name, mode->vrefresh, mode->clock,
59 mode->hdisplay, mode->hsync_start,
60 mode->hsync_end, mode->htotal,
61 mode->vdisplay, mode->vsync_start,
62 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
63}
64EXPORT_SYMBOL(drm_mode_debug_printmodeline);
65
66/**
67 * drm_mode_create - create a new display mode
68 * @dev: DRM device
69 *
70 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it
71 * and return it.
72 *
73 * Returns:
74 * Pointer to new mode on success, NULL on error.
75 */
76struct drm_display_mode *drm_mode_create(struct drm_device *dev)
77{
78 struct drm_display_mode *nmode;
79
80 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
81 if (!nmode)
82 return NULL;
83
84 if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
85 kfree(nmode);
86 return NULL;
87 }
88
89 return nmode;
90}
91EXPORT_SYMBOL(drm_mode_create);
92
93/**
94 * drm_mode_destroy - remove a mode
95 * @dev: DRM device
96 * @mode: mode to remove
97 *
98 * Release @mode's unique ID, then free it @mode structure itself using kfree.
99 */
100void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
101{
102 if (!mode)
103 return;
104
105 drm_mode_object_put(dev, &mode->base);
106
107 kfree(mode);
108}
109EXPORT_SYMBOL(drm_mode_destroy);
110
111/**
112 * drm_mode_probed_add - add a mode to a connector's probed_mode list
113 * @connector: connector the new mode
114 * @mode: mode data
115 *
116 * Add @mode to @connector's probed_mode list for later use. This list should
117 * then in a second step get filtered and all the modes actually supported by
118 * the hardware moved to the @connector's modes list.
119 */
120void drm_mode_probed_add(struct drm_connector *connector,
121 struct drm_display_mode *mode)
122{
123 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
124
125 list_add_tail(&mode->head, &connector->probed_modes);
126}
127EXPORT_SYMBOL(drm_mode_probed_add);
128
129/**
130 * drm_cvt_mode -create a modeline based on the CVT algorithm
131 * @dev: drm device
132 * @hdisplay: hdisplay size
133 * @vdisplay: vdisplay size
134 * @vrefresh: vrefresh rate
135 * @reduced: whether to use reduced blanking
136 * @interlaced: whether to compute an interlaced mode
137 * @margins: whether to add margins (borders)
138 *
139 * This function is called to generate the modeline based on CVT algorithm
140 * according to the hdisplay, vdisplay, vrefresh.
141 * It is based from the VESA(TM) Coordinated Video Timing Generator by
142 * Graham Loveridge April 9, 2003 available at
143 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
144 *
145 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
146 * What I have done is to translate it by using integer calculation.
147 *
148 * Returns:
149 * The modeline based on the CVT algorithm stored in a drm_display_mode object.
150 * The display mode object is allocated with drm_mode_create(). Returns NULL
151 * when no mode could be allocated.
152 */
153struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
154 int vdisplay, int vrefresh,
155 bool reduced, bool interlaced, bool margins)
156{
157#define HV_FACTOR 1000
158 /* 1) top/bottom margin size (% of height) - default: 1.8, */
159#define CVT_MARGIN_PERCENTAGE 18
160 /* 2) character cell horizontal granularity (pixels) - default 8 */
161#define CVT_H_GRANULARITY 8
162 /* 3) Minimum vertical porch (lines) - default 3 */
163#define CVT_MIN_V_PORCH 3
164 /* 4) Minimum number of vertical back porch lines - default 6 */
165#define CVT_MIN_V_BPORCH 6
166 /* Pixel Clock step (kHz) */
167#define CVT_CLOCK_STEP 250
168 struct drm_display_mode *drm_mode;
169 unsigned int vfieldrate, hperiod;
170 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
171 int interlace;
172
173 /* allocate the drm_display_mode structure. If failure, we will
174 * return directly
175 */
176 drm_mode = drm_mode_create(dev);
177 if (!drm_mode)
178 return NULL;
179
180 /* the CVT default refresh rate is 60Hz */
181 if (!vrefresh)
182 vrefresh = 60;
183
184 /* the required field fresh rate */
185 if (interlaced)
186 vfieldrate = vrefresh * 2;
187 else
188 vfieldrate = vrefresh;
189
190 /* horizontal pixels */
191 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
192
193 /* determine the left&right borders */
194 hmargin = 0;
195 if (margins) {
196 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
197 hmargin -= hmargin % CVT_H_GRANULARITY;
198 }
199 /* find the total active pixels */
200 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
201
202 /* find the number of lines per field */
203 if (interlaced)
204 vdisplay_rnd = vdisplay / 2;
205 else
206 vdisplay_rnd = vdisplay;
207
208 /* find the top & bottom borders */
209 vmargin = 0;
210 if (margins)
211 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
212
213 drm_mode->vdisplay = vdisplay + 2 * vmargin;
214
215 /* Interlaced */
216 if (interlaced)
217 interlace = 1;
218 else
219 interlace = 0;
220
221 /* Determine VSync Width from aspect ratio */
222 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
223 vsync = 4;
224 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
225 vsync = 5;
226 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
227 vsync = 6;
228 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
229 vsync = 7;
230 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
231 vsync = 7;
232 else /* custom */
233 vsync = 10;
234
235 if (!reduced) {
236 /* simplify the GTF calculation */
237 /* 4) Minimum time of vertical sync + back porch interval (µs)
238 * default 550.0
239 */
240 int tmp1, tmp2;
241#define CVT_MIN_VSYNC_BP 550
242 /* 3) Nominal HSync width (% of line period) - default 8 */
243#define CVT_HSYNC_PERCENTAGE 8
244 unsigned int hblank_percentage;
245 int vsyncandback_porch, vback_porch __unused, hblank;
246
247 /* estimated the horizontal period */
248 tmp1 = HV_FACTOR * 1000000 -
249 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
250 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
251 interlace;
252 hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
253
254 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
255 /* 9. Find number of lines in sync + backporch */
256 if (tmp1 < (vsync + CVT_MIN_V_PORCH))
257 vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
258 else
259 vsyncandback_porch = tmp1;
260 /* 10. Find number of lines in back porch */
261 vback_porch = vsyncandback_porch - vsync;
262 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
263 vsyncandback_porch + CVT_MIN_V_PORCH;
264 /* 5) Definition of Horizontal blanking time limitation */
265 /* Gradient (%/kHz) - default 600 */
266#define CVT_M_FACTOR 600
267 /* Offset (%) - default 40 */
268#define CVT_C_FACTOR 40
269 /* Blanking time scaling factor - default 128 */
270#define CVT_K_FACTOR 128
271 /* Scaling factor weighting - default 20 */
272#define CVT_J_FACTOR 20
273#define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
274#define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
275 CVT_J_FACTOR)
276 /* 12. Find ideal blanking duty cycle from formula */
277 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
278 hperiod / 1000;
279 /* 13. Blanking time */
280 if (hblank_percentage < 20 * HV_FACTOR)
281 hblank_percentage = 20 * HV_FACTOR;
282 hblank = drm_mode->hdisplay * hblank_percentage /
283 (100 * HV_FACTOR - hblank_percentage);
284 hblank -= hblank % (2 * CVT_H_GRANULARITY);
285 /* 14. find the total pixes per line */
286 drm_mode->htotal = drm_mode->hdisplay + hblank;
287 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
288 drm_mode->hsync_start = drm_mode->hsync_end -
289 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
290 drm_mode->hsync_start += CVT_H_GRANULARITY -
291 drm_mode->hsync_start % CVT_H_GRANULARITY;
292 /* fill the Vsync values */
293 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
294 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
295 } else {
296 /* Reduced blanking */
297 /* Minimum vertical blanking interval time (µs)- default 460 */
298#define CVT_RB_MIN_VBLANK 460
299 /* Fixed number of clocks for horizontal sync */
300#define CVT_RB_H_SYNC 32
301 /* Fixed number of clocks for horizontal blanking */
302#define CVT_RB_H_BLANK 160
303 /* Fixed number of lines for vertical front porch - default 3*/
304#define CVT_RB_VFPORCH 3
305 int vbilines;
306 int tmp1, tmp2;
307 /* 8. Estimate Horizontal period. */
308 tmp1 = HV_FACTOR * 1000000 -
309 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
310 tmp2 = vdisplay_rnd + 2 * vmargin;
311 hperiod = tmp1 / (tmp2 * vfieldrate);
312 /* 9. Find number of lines in vertical blanking */
313 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
314 /* 10. Check if vertical blanking is sufficient */
315 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
316 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
317 /* 11. Find total number of lines in vertical field */
318 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
319 /* 12. Find total number of pixels in a line */
320 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
321 /* Fill in HSync values */
322 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
323 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
324 /* Fill in VSync values */
325 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
326 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
327 }
328 /* 15/13. Find pixel clock frequency (kHz for xf86) */
329 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod;
330 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP;
331 /* 18/16. Find actual vertical frame frequency */
332 /* ignore - just set the mode flag for interlaced */
333 if (interlaced) {
334 drm_mode->vtotal *= 2;
335 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
336 }
337 /* Fill the mode line name */
338 drm_mode_set_name(drm_mode);
339 if (reduced)
340 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
341 DRM_MODE_FLAG_NVSYNC);
342 else
343 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
344 DRM_MODE_FLAG_NHSYNC);
345
346 return drm_mode;
347}
348EXPORT_SYMBOL(drm_cvt_mode);
349
350/**
351 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm
352 * @dev: drm device
353 * @hdisplay: hdisplay size
354 * @vdisplay: vdisplay size
355 * @vrefresh: vrefresh rate.
356 * @interlaced: whether to compute an interlaced mode
357 * @margins: desired margin (borders) size
358 * @GTF_M: extended GTF formula parameters
359 * @GTF_2C: extended GTF formula parameters
360 * @GTF_K: extended GTF formula parameters
361 * @GTF_2J: extended GTF formula parameters
362 *
363 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
364 * in here multiplied by two. For a C of 40, pass in 80.
365 *
366 * Returns:
367 * The modeline based on the full GTF algorithm stored in a drm_display_mode object.
368 * The display mode object is allocated with drm_mode_create(). Returns NULL
369 * when no mode could be allocated.
370 */
371struct drm_display_mode *
372drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
373 int vrefresh, bool interlaced, int margins,
374 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
375{ /* 1) top/bottom margin size (% of height) - default: 1.8, */
376#define GTF_MARGIN_PERCENTAGE 18
377 /* 2) character cell horizontal granularity (pixels) - default 8 */
378#define GTF_CELL_GRAN 8
379 /* 3) Minimum vertical porch (lines) - default 3 */
380#define GTF_MIN_V_PORCH 1
381 /* width of vsync in lines */
382#define V_SYNC_RQD 3
383 /* width of hsync as % of total line */
384#define H_SYNC_PERCENT 8
385 /* min time of vsync + back porch (microsec) */
386#define MIN_VSYNC_PLUS_BP 550
387 /* C' and M' are part of the Blanking Duty Cycle computation */
388#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
389#define GTF_M_PRIME (GTF_K * GTF_M / 256)
390 struct drm_display_mode *drm_mode;
391 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
392 int top_margin, bottom_margin;
393 int interlace;
394 unsigned int hfreq_est;
395 int vsync_plus_bp, vback_porch __unused;
396 unsigned int vtotal_lines, vfieldrate_est __unused, hperiod __unused;
397 unsigned int vfield_rate, vframe_rate __unused;
398 int left_margin, right_margin;
399 unsigned int total_active_pixels, ideal_duty_cycle;
400 unsigned int hblank, total_pixels, pixel_freq;
401 int hsync, hfront_porch, vodd_front_porch_lines;
402 unsigned int tmp1, tmp2;
403
404 drm_mode = drm_mode_create(dev);
405 if (!drm_mode)
406 return NULL;
407
408 /* 1. In order to give correct results, the number of horizontal
409 * pixels requested is first processed to ensure that it is divisible
410 * by the character size, by rounding it to the nearest character
411 * cell boundary:
412 */
413 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
414 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
415
416 /* 2. If interlace is requested, the number of vertical lines assumed
417 * by the calculation must be halved, as the computation calculates
418 * the number of vertical lines per field.
419 */
420 if (interlaced)
421 vdisplay_rnd = vdisplay / 2;
422 else
423 vdisplay_rnd = vdisplay;
424
425 /* 3. Find the frame rate required: */
426 if (interlaced)
427 vfieldrate_rqd = vrefresh * 2;
428 else
429 vfieldrate_rqd = vrefresh;
430
431 /* 4. Find number of lines in Top margin: */
432 top_margin = 0;
433 if (margins)
434 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
435 1000;
436 /* 5. Find number of lines in bottom margin: */
437 bottom_margin = top_margin;
438
439 /* 6. If interlace is required, then set variable interlace: */
440 if (interlaced)
441 interlace = 1;
442 else
443 interlace = 0;
444
445 /* 7. Estimate the Horizontal frequency */
446 {
447 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
448 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
449 2 + interlace;
450 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
451 }
452
453 /* 8. Find the number of lines in V sync + back porch */
454 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
455 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
456 vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
457 /* 9. Find the number of lines in V back porch alone: */
458 vback_porch = vsync_plus_bp - V_SYNC_RQD;
459 /* 10. Find the total number of lines in Vertical field period: */
460 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
461 vsync_plus_bp + GTF_MIN_V_PORCH;
462 /* 11. Estimate the Vertical field frequency: */
463 vfieldrate_est = hfreq_est / vtotal_lines;
464 /* 12. Find the actual horizontal period: */
465 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
466
467 /* 13. Find the actual Vertical field frequency: */
468 vfield_rate = hfreq_est / vtotal_lines;
469 /* 14. Find the Vertical frame frequency: */
470 if (interlaced)
471 vframe_rate = vfield_rate / 2;
472 else
473 vframe_rate = vfield_rate;
474 /* 15. Find number of pixels in left margin: */
475 if (margins)
476 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
477 1000;
478 else
479 left_margin = 0;
480
481 /* 16.Find number of pixels in right margin: */
482 right_margin = left_margin;
483 /* 17.Find total number of active pixels in image and left and right */
484 total_active_pixels = hdisplay_rnd + left_margin + right_margin;
485 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
486 ideal_duty_cycle = GTF_C_PRIME * 1000 -
487 (GTF_M_PRIME * 1000000 / hfreq_est);
488 /* 19.Find the number of pixels in the blanking time to the nearest
489 * double character cell: */
490 hblank = total_active_pixels * ideal_duty_cycle /
491 (100000 - ideal_duty_cycle);
492 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
493 hblank = hblank * 2 * GTF_CELL_GRAN;
494 /* 20.Find total number of pixels: */
495 total_pixels = total_active_pixels + hblank;
496 /* 21.Find pixel clock frequency: */
497 pixel_freq = total_pixels * hfreq_est / 1000;
498 /* Stage 1 computations are now complete; I should really pass
499 * the results to another function and do the Stage 2 computations,
500 * but I only need a few more values so I'll just append the
501 * computations here for now */
502 /* 17. Find the number of pixels in the horizontal sync period: */
503 hsync = H_SYNC_PERCENT * total_pixels / 100;
504 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
505 hsync = hsync * GTF_CELL_GRAN;
506 /* 18. Find the number of pixels in horizontal front porch period */
507 hfront_porch = hblank / 2 - hsync;
508 /* 36. Find the number of lines in the odd front porch period: */
509 vodd_front_porch_lines = GTF_MIN_V_PORCH ;
510
511 /* finally, pack the results in the mode struct */
512 drm_mode->hdisplay = hdisplay_rnd;
513 drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
514 drm_mode->hsync_end = drm_mode->hsync_start + hsync;
515 drm_mode->htotal = total_pixels;
516 drm_mode->vdisplay = vdisplay_rnd;
517 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
518 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
519 drm_mode->vtotal = vtotal_lines;
520
521 drm_mode->clock = pixel_freq;
522
523 if (interlaced) {
524 drm_mode->vtotal *= 2;
525 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
526 }
527
528 drm_mode_set_name(drm_mode);
529 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
530 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
531 else
532 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
533
534 return drm_mode;
535}
536EXPORT_SYMBOL(drm_gtf_mode_complex);
537
538/**
539 * drm_gtf_mode - create the modeline based on the GTF algorithm
540 * @dev: drm device
541 * @hdisplay: hdisplay size
542 * @vdisplay: vdisplay size
543 * @vrefresh: vrefresh rate.
544 * @interlaced: whether to compute an interlaced mode
545 * @margins: desired margin (borders) size
546 *
547 * return the modeline based on GTF algorithm
548 *
549 * This function is to create the modeline based on the GTF algorithm.
550 * Generalized Timing Formula is derived from:
551 * GTF Spreadsheet by Andy Morrish (1/5/97)
552 * available at http://www.vesa.org
553 *
554 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
555 * What I have done is to translate it by using integer calculation.
556 * I also refer to the function of fb_get_mode in the file of
557 * drivers/video/fbmon.c
558 *
559 * Standard GTF parameters:
560 * M = 600
561 * C = 40
562 * K = 128
563 * J = 20
564 *
565 * Returns:
566 * The modeline based on the GTF algorithm stored in a drm_display_mode object.
567 * The display mode object is allocated with drm_mode_create(). Returns NULL
568 * when no mode could be allocated.
569 */
570struct drm_display_mode *
571drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
572 bool interlaced, int margins)
573{
574 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh,
575 interlaced, margins,
576 600, 40 * 2, 128, 20 * 2);
577}
578EXPORT_SYMBOL(drm_gtf_mode);
579
580#ifdef CONFIG_VIDEOMODE_HELPERS
581/**
582 * drm_display_mode_from_videomode - fill in @dmode using @vm,
583 * @vm: videomode structure to use as source
584 * @dmode: drm_display_mode structure to use as destination
585 *
586 * Fills out @dmode using the display mode specified in @vm.
587 */
588void drm_display_mode_from_videomode(const struct videomode *vm,
589 struct drm_display_mode *dmode)
590{
591 dmode->hdisplay = vm->hactive;
592 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch;
593 dmode->hsync_end = dmode->hsync_start + vm->hsync_len;
594 dmode->htotal = dmode->hsync_end + vm->hback_porch;
595
596 dmode->vdisplay = vm->vactive;
597 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch;
598 dmode->vsync_end = dmode->vsync_start + vm->vsync_len;
599 dmode->vtotal = dmode->vsync_end + vm->vback_porch;
600
601 dmode->clock = vm->pixelclock / 1000;
602
603 dmode->flags = 0;
604 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH)
605 dmode->flags |= DRM_MODE_FLAG_PHSYNC;
606 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW)
607 dmode->flags |= DRM_MODE_FLAG_NHSYNC;
608 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH)
609 dmode->flags |= DRM_MODE_FLAG_PVSYNC;
610 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW)
611 dmode->flags |= DRM_MODE_FLAG_NVSYNC;
612 if (vm->flags & DISPLAY_FLAGS_INTERLACED)
613 dmode->flags |= DRM_MODE_FLAG_INTERLACE;
614 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN)
615 dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
616 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
617 dmode->flags |= DRM_MODE_FLAG_DBLCLK;
618 drm_mode_set_name(dmode);
619}
620EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
621
622#ifdef CONFIG_OF
623/**
624 * of_get_drm_display_mode - get a drm_display_mode from devicetree
625 * @np: device_node with the timing specification
626 * @dmode: will be set to the return value
627 * @index: index into the list of display timings in devicetree
628 *
629 * This function is expensive and should only be used, if only one mode is to be
630 * read from DT. To get multiple modes start with of_get_display_timings and
631 * work with that instead.
632 *
633 * Returns:
634 * 0 on success, a negative errno code when no of videomode node was found.
635 */
636int of_get_drm_display_mode(struct device_node *np,
637 struct drm_display_mode *dmode, int index)
638{
639 struct videomode vm;
640 int ret;
641
642 ret = of_get_videomode(np, &vm, index);
643 if (ret)
644 return ret;
645
646 drm_display_mode_from_videomode(&vm, dmode);
647
648 pr_debug("%s: got %dx%d display mode from %s\n",
649 of_node_full_name(np), vm.hactive, vm.vactive, np->name);
650 drm_mode_debug_printmodeline(dmode);
651
652 return 0;
653}
654EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
655#endif /* CONFIG_OF */
656#endif /* CONFIG_VIDEOMODE_HELPERS */
657
658/**
659 * drm_mode_set_name - set the name on a mode
660 * @mode: name will be set in this mode
661 *
662 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay>
663 * with an optional 'i' suffix for interlaced modes.
664 */
665void drm_mode_set_name(struct drm_display_mode *mode)
666{
667 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
668
669 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
670 mode->hdisplay, mode->vdisplay,
671 interlaced ? "i" : "");
672}
673EXPORT_SYMBOL(drm_mode_set_name);
674
675/** drm_mode_hsync - get the hsync of a mode
676 * @mode: mode
677 *
678 * Returns:
679 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the
680 * value first if it is not yet set.
681 */
682int drm_mode_hsync(const struct drm_display_mode *mode)
683{
684 unsigned int calc_val;
685
686 if (mode->hsync)
687 return mode->hsync;
688
689 if (mode->htotal < 0)
690 return 0;
691
692 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
693 calc_val += 500; /* round to 1000Hz */
694 calc_val /= 1000; /* truncate to kHz */
695
696 return calc_val;
697}
698EXPORT_SYMBOL(drm_mode_hsync);
699
700/**
701 * drm_mode_vrefresh - get the vrefresh of a mode
702 * @mode: mode
703 *
704 * Returns:
705 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the
706 * value first if it is not yet set.
707 */
708int drm_mode_vrefresh(const struct drm_display_mode *mode)
709{
710 int refresh = 0;
711 unsigned int calc_val;
712
713 if (mode->vrefresh > 0)
714 refresh = mode->vrefresh;
715 else if (mode->htotal > 0 && mode->vtotal > 0) {
716 int vtotal;
717 vtotal = mode->vtotal;
718 /* work out vrefresh the value will be x1000 */
719 calc_val = (mode->clock * 1000);
720 calc_val /= mode->htotal;
721 refresh = (calc_val + vtotal / 2) / vtotal;
722
723 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
724 refresh *= 2;
725 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
726 refresh /= 2;
727 if (mode->vscan > 1)
728 refresh /= mode->vscan;
729 }
730 return refresh;
731}
732EXPORT_SYMBOL(drm_mode_vrefresh);
733
734/**
735 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
736 * @p: mode
737 * @adjust_flags: a combination of adjustment flags
738 *
739 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
740 *
741 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
742 * interlaced modes.
743 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
744 * buffers containing two eyes (only adjust the timings when needed, eg. for
745 * "frame packing" or "side by side full").
746 */
747void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
748{
749 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
750 return;
751
752 p->crtc_clock = p->clock;
753 p->crtc_hdisplay = p->hdisplay;
754 p->crtc_hsync_start = p->hsync_start;
755 p->crtc_hsync_end = p->hsync_end;
756 p->crtc_htotal = p->htotal;
757 p->crtc_hskew = p->hskew;
758 p->crtc_vdisplay = p->vdisplay;
759 p->crtc_vsync_start = p->vsync_start;
760 p->crtc_vsync_end = p->vsync_end;
761 p->crtc_vtotal = p->vtotal;
762
763 if (p->flags & DRM_MODE_FLAG_INTERLACE) {
764 if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
765 p->crtc_vdisplay /= 2;
766 p->crtc_vsync_start /= 2;
767 p->crtc_vsync_end /= 2;
768 p->crtc_vtotal /= 2;
769 }
770 }
771
772 if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
773 p->crtc_vdisplay *= 2;
774 p->crtc_vsync_start *= 2;
775 p->crtc_vsync_end *= 2;
776 p->crtc_vtotal *= 2;
777 }
778
779 if (p->vscan > 1) {
780 p->crtc_vdisplay *= p->vscan;
781 p->crtc_vsync_start *= p->vscan;
782 p->crtc_vsync_end *= p->vscan;
783 p->crtc_vtotal *= p->vscan;
784 }
785
786 if (adjust_flags & CRTC_STEREO_DOUBLE) {
787 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
788
789 switch (layout) {
790 case DRM_MODE_FLAG_3D_FRAME_PACKING:
791 p->crtc_clock *= 2;
792 p->crtc_vdisplay += p->crtc_vtotal;
793 p->crtc_vsync_start += p->crtc_vtotal;
794 p->crtc_vsync_end += p->crtc_vtotal;
795 p->crtc_vtotal += p->crtc_vtotal;
796 break;
797 }
798 }
799
800 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
801 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
802 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
803 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
804}
805EXPORT_SYMBOL(drm_mode_set_crtcinfo);
806
807/**
808 * drm_mode_copy - copy the mode
809 * @dst: mode to overwrite
810 * @src: mode to copy
811 *
812 * Copy an existing mode into another mode, preserving the object id and
813 * list head of the destination mode.
814 */
815void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
816{
817 int id = dst->base.id;
818 struct list_head head = dst->head;
819
820 *dst = *src;
821 dst->base.id = id;
822 dst->head = head;
823}
824EXPORT_SYMBOL(drm_mode_copy);
825
826/**
827 * drm_mode_duplicate - allocate and duplicate an existing mode
828 * @dev: drm_device to allocate the duplicated mode for
829 * @mode: mode to duplicate
830 *
831 * Just allocate a new mode, copy the existing mode into it, and return
832 * a pointer to it. Used to create new instances of established modes.
833 *
834 * Returns:
835 * Pointer to duplicated mode on success, NULL on error.
836 */
837struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
838 const struct drm_display_mode *mode)
839{
840 struct drm_display_mode *nmode;
841
842 nmode = drm_mode_create(dev);
843 if (!nmode)
844 return NULL;
845
846 drm_mode_copy(nmode, mode);
847
848 return nmode;
849}
850EXPORT_SYMBOL(drm_mode_duplicate);
851
852/**
853 * drm_mode_equal - test modes for equality
854 * @mode1: first mode
855 * @mode2: second mode
856 *
857 * Check to see if @mode1 and @mode2 are equivalent.
858 *
859 * Returns:
860 * True if the modes are equal, false otherwise.
861 */
862bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
863{
864 /* do clock check convert to PICOS so fb modes get matched
865 * the same */
866 if (mode1->clock && mode2->clock) {
867 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
868 return false;
869 } else if (mode1->clock != mode2->clock)
870 return false;
871
872 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) !=
873 (mode2->flags & DRM_MODE_FLAG_3D_MASK))
874 return false;
875
876 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2);
877}
878EXPORT_SYMBOL(drm_mode_equal);
879
880/**
881 * drm_mode_equal_no_clocks_no_stereo - test modes for equality
882 * @mode1: first mode
883 * @mode2: second mode
884 *
885 * Check to see if @mode1 and @mode2 are equivalent, but
886 * don't check the pixel clocks nor the stereo layout.
887 *
888 * Returns:
889 * True if the modes are equal, false otherwise.
890 */
891bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
892 const struct drm_display_mode *mode2)
893{
894 if (mode1->hdisplay == mode2->hdisplay &&
895 mode1->hsync_start == mode2->hsync_start &&
896 mode1->hsync_end == mode2->hsync_end &&
897 mode1->htotal == mode2->htotal &&
898 mode1->hskew == mode2->hskew &&
899 mode1->vdisplay == mode2->vdisplay &&
900 mode1->vsync_start == mode2->vsync_start &&
901 mode1->vsync_end == mode2->vsync_end &&
902 mode1->vtotal == mode2->vtotal &&
903 mode1->vscan == mode2->vscan &&
904 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
905 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK))
906 return true;
907
908 return false;
909}
910EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
911
912/**
913 * drm_mode_validate_size - make sure modes adhere to size constraints
914 * @dev: DRM device
915 * @mode_list: list of modes to check
916 * @maxX: maximum width
917 * @maxY: maximum height
918 *
919 * This function is a helper which can be used to validate modes against size
920 * limitations of the DRM device/connector. If a mode is too big its status
921 * memeber is updated with the appropriate validation failure code. The list
922 * itself is not changed.
923 */
924void drm_mode_validate_size(struct drm_device *dev,
925 struct list_head *mode_list,
926 int maxX, int maxY)
927{
928 struct drm_display_mode *mode;
929
930 list_for_each_entry(mode, mode_list, head) {
931 if (maxX > 0 && mode->hdisplay > maxX)
932 mode->status = MODE_VIRTUAL_X;
933
934 if (maxY > 0 && mode->vdisplay > maxY)
935 mode->status = MODE_VIRTUAL_Y;
936 }
937}
938EXPORT_SYMBOL(drm_mode_validate_size);
939
940/**
941 * drm_mode_prune_invalid - remove invalid modes from mode list
942 * @dev: DRM device
943 * @mode_list: list of modes to check
944 * @verbose: be verbose about it
945 *
946 * This helper function can be used to prune a display mode list after
947 * validation has been completed. All modes who's status is not MODE_OK will be
948 * removed from the list, and if @verbose the status code and mode name is also
949 * printed to dmesg.
950 */
951void drm_mode_prune_invalid(struct drm_device *dev,
952 struct list_head *mode_list, bool verbose)
953{
954 struct drm_display_mode *mode, *t;
955
956 list_for_each_entry_safe(mode, t, mode_list, head) {
957 if (mode->status != MODE_OK) {
958 list_del(&mode->head);
959 if (verbose) {
960 drm_mode_debug_printmodeline(mode);
961 DRM_DEBUG_KMS("Not using %s mode %d\n",
962 mode->name, mode->status);
963 }
964 drm_mode_destroy(dev, mode);
965 }
966 }
967}
968EXPORT_SYMBOL(drm_mode_prune_invalid);
969
970/**
971 * drm_mode_compare - compare modes for favorability
972 * @priv: unused
973 * @lh_a: list_head for first mode
974 * @lh_b: list_head for second mode
975 *
976 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
977 * which is better.
978 *
979 * Returns:
980 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
981 * positive if @lh_b is better than @lh_a.
982 */
983static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
984{
985 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
986 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
987 int diff;
988
989 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
990 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
991 if (diff)
992 return diff;
993 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
994 if (diff)
995 return diff;
996
997 diff = b->vrefresh - a->vrefresh;
998 if (diff)
999 return diff;
1000
1001 diff = b->clock - a->clock;
1002 return diff;
1003}
1004
1005/**
1006 * drm_mode_sort - sort mode list
1007 * @mode_list: list of drm_display_mode structures to sort
1008 *
1009 * Sort @mode_list by favorability, moving good modes to the head of the list.
1010 */
1011void drm_mode_sort(struct list_head *mode_list)
1012{
1013 list_sort(NULL, mode_list, drm_mode_compare);
1014}
1015EXPORT_SYMBOL(drm_mode_sort);
1016
1017/**
1018 * drm_mode_connector_list_update - update the mode list for the connector
1019 * @connector: the connector to update
1020 *
1021 * This moves the modes from the @connector probed_modes list
1022 * to the actual mode list. It compares the probed mode against the current
1023 * list and only adds different/new modes.
1024 *
1025 * This is just a helper functions doesn't validate any modes itself and also
1026 * doesn't prune any invalid modes. Callers need to do that themselves.
1027 */
1028void drm_mode_connector_list_update(struct drm_connector *connector)
1029{
1030 struct drm_display_mode *mode;
1031 struct drm_display_mode *pmode, *pt;
1032 int found_it;
1033
1034 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
1035
1036 list_for_each_entry_safe(pmode, pt, &connector->probed_modes,
1037 head) {
1038 found_it = 0;
1039 /* go through current modes checking for the new probed mode */
1040 list_for_each_entry(mode, &connector->modes, head) {
1041 if (drm_mode_equal(pmode, mode)) {
1042 found_it = 1;
1043 /* if equal delete the probed mode */
1044 mode->status = pmode->status;
1045 /* Merge type bits together */
1046 mode->type |= pmode->type;
1047 list_del(&pmode->head);
1048 drm_mode_destroy(connector->dev, pmode);
1049 break;
1050 }
1051 }
1052
1053 if (!found_it) {
1054 list_move_tail(&pmode->head, &connector->modes);
1055 }
1056 }
1057}
1058EXPORT_SYMBOL(drm_mode_connector_list_update);
1059
1060/**
1061 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector
1062 * @mode_option: optional per connector mode option
1063 * @connector: connector to parse modeline for
1064 * @mode: preallocated drm_cmdline_mode structure to fill out
1065 *
1066 * This parses @mode_option command line modeline for modes and options to
1067 * configure the connector. If @mode_option is NULL the default command line
1068 * modeline in fb_mode_option will be parsed instead.
1069 *
1070 * This uses the same parameters as the fb modedb.c, except for an extra
1071 * force-enable, force-enable-digital and force-disable bit at the end:
1072 *
1073 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
1074 *
1075 * The intermediate drm_cmdline_mode structure is required to store additional
1076 * options from the command line modline like the force-enabel/disable flag.
1077 *
1078 * Returns:
1079 * True if a valid modeline has been parsed, false otherwise.
1080 */
1081bool drm_mode_parse_command_line_for_connector(const char *mode_option,
1082 struct drm_connector *connector,
1083 struct drm_cmdline_mode *mode)
1084{
1085 const char *name;
1086 unsigned int namelen;
1087 bool res_specified = false, bpp_specified = false, refresh_specified = false;
1088 long xres = 0, yres = 0, bpp = 32, refresh = 0;
1089 bool yres_specified = false, cvt = false, rb = false;
1090 bool interlace = false, margins = false, was_digit = false;
1091 int i;
1092 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
1093
1094#if !defined(__NetBSD__)
1095#ifdef CONFIG_FB
1096 if (!mode_option)
1097 mode_option = fb_mode_option;
1098#endif
1099#endif
1100
1101 if (!mode_option) {
1102 mode->specified = false;
1103 return false;
1104 }
1105
1106 name = mode_option;
1107 namelen = strlen(name);
1108 for (i = namelen-1; i >= 0; i--) {
1109 switch (name[i]) {
1110 case '@':
1111 if (!refresh_specified && !bpp_specified &&
1112 !yres_specified && !cvt && !rb && was_digit) {
1113 if (kstrtol(&name[i+1], 10, &refresh) == 0) {
1114 refresh_specified = true;
1115 was_digit = false;
1116 } else {
1117 goto done;
1118 }
1119 } else
1120 goto done;
1121 break;
1122 case '-':
1123 if (!bpp_specified && !yres_specified && !cvt &&
1124 !rb && was_digit) {
1125 if (kstrtol(&name[i+1], 10, &bpp) == 0) {
1126 bpp_specified = true;
1127 was_digit = false;
1128 } else {
1129 goto done;
1130 }
1131 } else
1132 goto done;
1133 break;
1134 case 'x':
1135 if (!yres_specified && was_digit) {
1136 if (kstrtol(&name[i+1], 10, &yres) == 0) {
1137 yres_specified = true;
1138 was_digit = false;
1139 } else {
1140 goto done;
1141 }
1142 } else
1143 goto done;
1144 break;
1145 case '0' ... '9':
1146 was_digit = true;
1147 break;
1148 case 'M':
1149 if (yres_specified || cvt || was_digit)
1150 goto done;
1151 cvt = true;
1152 break;
1153 case 'R':
1154 if (yres_specified || cvt || rb || was_digit)
1155 goto done;
1156 rb = true;
1157 break;
1158 case 'm':
1159 if (cvt || yres_specified || was_digit)
1160 goto done;
1161 margins = true;
1162 break;
1163 case 'i':
1164 if (cvt || yres_specified || was_digit)
1165 goto done;
1166 interlace = true;
1167 break;
1168 case 'e':
1169 if (yres_specified || bpp_specified || refresh_specified ||
1170 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1171 goto done;
1172
1173 force = DRM_FORCE_ON;
1174 break;
1175 case 'D':
1176 if (yres_specified || bpp_specified || refresh_specified ||
1177 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1178 goto done;
1179
1180 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1181 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1182 force = DRM_FORCE_ON;
1183 else
1184 force = DRM_FORCE_ON_DIGITAL;
1185 break;
1186 case 'd':
1187 if (yres_specified || bpp_specified || refresh_specified ||
1188 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1189 goto done;
1190
1191 force = DRM_FORCE_OFF;
1192 break;
1193 default:
1194 goto done;
1195 }
1196 }
1197
1198 if (i < 0 && yres_specified) {
1199 char *ch = NULL;
1200 xres = strtoll(name, &ch, 10);
1201 if ((ch != NULL) && (*ch == 'x'))
1202 res_specified = true;
1203 else
1204 i = ch - name;
1205 } else if (!yres_specified && was_digit) {
1206 /* catch mode that begins with digits but has no 'x' */
1207 i = 0;
1208 }
1209done:
1210 if (i >= 0) {
1211 DRM_ERROR(
1212 "parse error at position %i in video mode '%s'\n",
1213 i, name);
1214 mode->specified = false;
1215 return false;
1216 }
1217
1218 if (res_specified) {
1219 mode->specified = true;
1220 mode->xres = xres;
1221 mode->yres = yres;
1222 }
1223
1224 if (refresh_specified) {
1225 mode->refresh_specified = true;
1226 mode->refresh = refresh;
1227 }
1228
1229 if (bpp_specified) {
1230 mode->bpp_specified = true;
1231 mode->bpp = bpp;
1232 }
1233 mode->rb = rb;
1234 mode->cvt = cvt;
1235 mode->interlace = interlace;
1236 mode->margins = margins;
1237 mode->force = force;
1238
1239 return true;
1240}
1241EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
1242
1243/**
1244 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
1245 * @dev: DRM device to create the new mode for
1246 * @cmd: input command line modeline
1247 *
1248 * Returns:
1249 * Pointer to converted mode on success, NULL on error.
1250 */
1251struct drm_display_mode *
1252drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1253 struct drm_cmdline_mode *cmd)
1254{
1255 struct drm_display_mode *mode;
1256
1257 if (cmd->cvt)
1258 mode = drm_cvt_mode(dev,
1259 cmd->xres, cmd->yres,
1260 cmd->refresh_specified ? cmd->refresh : 60,
1261 cmd->rb, cmd->interlace,
1262 cmd->margins);
1263 else
1264 mode = drm_gtf_mode(dev,
1265 cmd->xres, cmd->yres,
1266 cmd->refresh_specified ? cmd->refresh : 60,
1267 cmd->interlace,
1268 cmd->margins);
1269 if (!mode)
1270 return NULL;
1271
1272 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1273 return mode;
1274}
1275EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);
1276