projects/linux·blob master · refs

2801 lines · 80.3 KiB

1/*
2 * Copyright © 1997-2003 by The XFree86 Project, Inc.
3 * Copyright © 2007 Dave Airlie
4 * Copyright © 2007-2008 Intel Corporation
5 * Jesse Barnes <[email protected]>
6 * Copyright 2005-2006 Luc Verhaegen
7 * Copyright (c) 2001, Andy Ritger [email protected]
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 *
27 * Except as contained in this notice, the name of the copyright holder(s)
28 * and author(s) shall not be used in advertising or otherwise to promote
29 * the sale, use or other dealings in this Software without prior written
30 * authorization from the copyright holder(s) and author(s).
31 */
32
33#include <linux/ctype.h>
34#include <linux/export.h>
35#include <linux/fb.h> /* for KHZ2PICOS() */
36#include <linux/list.h>
37#include <linux/list_sort.h>
38#include <linux/of.h>
39
40#include <video/of_display_timing.h>
41#include <video/of_videomode.h>
42#include <video/videomode.h>
43
44#include <drm/drm_crtc.h>
45#include <drm/drm_device.h>
46#include <drm/drm_edid.h>
47#include <drm/drm_modes.h>
48#include <drm/drm_print.h>
49
50#include "drm_crtc_internal.h"
51
52/**
53 * drm_mode_debug_printmodeline - print a mode to dmesg
54 * @mode: mode to print
55 *
56 * Describe @mode using DRM_DEBUG.
57 */
58void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
59{
60 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
61}
62EXPORT_SYMBOL(drm_mode_debug_printmodeline);
63
64/**
65 * drm_mode_create - create a new display mode
66 * @dev: DRM device
67 *
68 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it
69 * and return it.
70 *
71 * Returns:
72 * Pointer to new mode on success, NULL on error.
73 */
74struct drm_display_mode *drm_mode_create(struct drm_device *dev)
75{
76 struct drm_display_mode *nmode;
77
78 nmode = kzalloc_obj(struct drm_display_mode);
79 if (!nmode)
80 return NULL;
81
82 return nmode;
83}
84EXPORT_SYMBOL(drm_mode_create);
85
86/**
87 * drm_mode_destroy - remove a mode
88 * @dev: DRM device
89 * @mode: mode to remove
90 *
91 * Release @mode's unique ID, then free it @mode structure itself using kfree.
92 */
93void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
94{
95 if (!mode)
96 return;
97
98 kfree(mode);
99}
100EXPORT_SYMBOL(drm_mode_destroy);
101
102/**
103 * drm_mode_probed_add - add a mode to a connector's probed_mode list
104 * @connector: connector the new mode
105 * @mode: mode data
106 *
107 * Add @mode to @connector's probed_mode list for later use. This list should
108 * then in a second step get filtered and all the modes actually supported by
109 * the hardware moved to the @connector's modes list.
110 */
111void drm_mode_probed_add(struct drm_connector *connector,
112 struct drm_display_mode *mode)
113{
114 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
115
116 list_add_tail(&mode->head, &connector->probed_modes);
117}
118EXPORT_SYMBOL(drm_mode_probed_add);
119
120enum drm_mode_analog {
121 DRM_MODE_ANALOG_NTSC, /* 525 lines, 60Hz */
122 DRM_MODE_ANALOG_PAL, /* 625 lines, 50Hz */
123};
124
125/*
126 * The timings come from:
127 * - https://web.archive.org/web/20220406232708/http://www.kolumbus.fi/pami1/video/pal_ntsc.html
128 * - https://web.archive.org/web/20220406124914/http://martin.hinner.info/vga/pal.html
129 * - https://web.archive.org/web/20220609202433/http://www.batsocks.co.uk/readme/video_timing.htm
130 */
131#define NTSC_LINE_DURATION_NS 63556U
132#define NTSC_LINES_NUMBER 525
133
134#define NTSC_HBLK_DURATION_TYP_NS 10900U
135#define NTSC_HBLK_DURATION_MIN_NS (NTSC_HBLK_DURATION_TYP_NS - 200)
136#define NTSC_HBLK_DURATION_MAX_NS (NTSC_HBLK_DURATION_TYP_NS + 200)
137
138#define NTSC_HACT_DURATION_TYP_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_TYP_NS)
139#define NTSC_HACT_DURATION_MIN_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_MAX_NS)
140#define NTSC_HACT_DURATION_MAX_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_MIN_NS)
141
142#define NTSC_HFP_DURATION_TYP_NS 1500
143#define NTSC_HFP_DURATION_MIN_NS 1270
144#define NTSC_HFP_DURATION_MAX_NS 2220
145
146#define NTSC_HSLEN_DURATION_TYP_NS 4700
147#define NTSC_HSLEN_DURATION_MIN_NS (NTSC_HSLEN_DURATION_TYP_NS - 100)
148#define NTSC_HSLEN_DURATION_MAX_NS (NTSC_HSLEN_DURATION_TYP_NS + 100)
149
150#define NTSC_HBP_DURATION_TYP_NS 4700
151
152/*
153 * I couldn't find the actual tolerance for the back porch, so let's
154 * just reuse the sync length ones.
155 */
156#define NTSC_HBP_DURATION_MIN_NS (NTSC_HBP_DURATION_TYP_NS - 100)
157#define NTSC_HBP_DURATION_MAX_NS (NTSC_HBP_DURATION_TYP_NS + 100)
158
159#define PAL_LINE_DURATION_NS 64000U
160#define PAL_LINES_NUMBER 625
161
162#define PAL_HACT_DURATION_TYP_NS 51950U
163#define PAL_HACT_DURATION_MIN_NS (PAL_HACT_DURATION_TYP_NS - 100)
164#define PAL_HACT_DURATION_MAX_NS (PAL_HACT_DURATION_TYP_NS + 400)
165
166#define PAL_HBLK_DURATION_TYP_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_TYP_NS)
167#define PAL_HBLK_DURATION_MIN_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_MAX_NS)
168#define PAL_HBLK_DURATION_MAX_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_MIN_NS)
169
170#define PAL_HFP_DURATION_TYP_NS 1650
171#define PAL_HFP_DURATION_MIN_NS (PAL_HFP_DURATION_TYP_NS - 100)
172#define PAL_HFP_DURATION_MAX_NS (PAL_HFP_DURATION_TYP_NS + 400)
173
174#define PAL_HSLEN_DURATION_TYP_NS 4700
175#define PAL_HSLEN_DURATION_MIN_NS (PAL_HSLEN_DURATION_TYP_NS - 200)
176#define PAL_HSLEN_DURATION_MAX_NS (PAL_HSLEN_DURATION_TYP_NS + 200)
177
178#define PAL_HBP_DURATION_TYP_NS 5700
179#define PAL_HBP_DURATION_MIN_NS (PAL_HBP_DURATION_TYP_NS - 200)
180#define PAL_HBP_DURATION_MAX_NS (PAL_HBP_DURATION_TYP_NS + 200)
181
182struct analog_param_field {
183 unsigned int even, odd;
184};
185
186#define PARAM_FIELD(_odd, _even) \
187 { .even = _even, .odd = _odd }
188
189struct analog_param_range {
190 unsigned int min, typ, max;
191};
192
193#define PARAM_RANGE(_min, _typ, _max) \
194 { .min = _min, .typ = _typ, .max = _max }
195
196struct analog_parameters {
197 unsigned int num_lines;
198 unsigned int line_duration_ns;
199
200 struct analog_param_range hact_ns;
201 struct analog_param_range hfp_ns;
202 struct analog_param_range hslen_ns;
203 struct analog_param_range hbp_ns;
204 struct analog_param_range hblk_ns;
205
206 unsigned int bt601_hfp;
207
208 struct analog_param_field vfp_lines;
209 struct analog_param_field vslen_lines;
210 struct analog_param_field vbp_lines;
211};
212
213#define TV_MODE_PARAMETER(_mode, _lines, _line_dur, _hact, _hfp, \
214 _hslen, _hbp, _hblk, _bt601_hfp, _vfp, \
215 _vslen, _vbp) \
216 [_mode] = { \
217 .num_lines = _lines, \
218 .line_duration_ns = _line_dur, \
219 .hact_ns = _hact, \
220 .hfp_ns = _hfp, \
221 .hslen_ns = _hslen, \
222 .hbp_ns = _hbp, \
223 .hblk_ns = _hblk, \
224 .bt601_hfp = _bt601_hfp, \
225 .vfp_lines = _vfp, \
226 .vslen_lines = _vslen, \
227 .vbp_lines = _vbp, \
228 }
229
230static const struct analog_parameters tv_modes_parameters[] = {
231 TV_MODE_PARAMETER(DRM_MODE_ANALOG_NTSC,
232 NTSC_LINES_NUMBER,
233 NTSC_LINE_DURATION_NS,
234 PARAM_RANGE(NTSC_HACT_DURATION_MIN_NS,
235 NTSC_HACT_DURATION_TYP_NS,
236 NTSC_HACT_DURATION_MAX_NS),
237 PARAM_RANGE(NTSC_HFP_DURATION_MIN_NS,
238 NTSC_HFP_DURATION_TYP_NS,
239 NTSC_HFP_DURATION_MAX_NS),
240 PARAM_RANGE(NTSC_HSLEN_DURATION_MIN_NS,
241 NTSC_HSLEN_DURATION_TYP_NS,
242 NTSC_HSLEN_DURATION_MAX_NS),
243 PARAM_RANGE(NTSC_HBP_DURATION_MIN_NS,
244 NTSC_HBP_DURATION_TYP_NS,
245 NTSC_HBP_DURATION_MAX_NS),
246 PARAM_RANGE(NTSC_HBLK_DURATION_MIN_NS,
247 NTSC_HBLK_DURATION_TYP_NS,
248 NTSC_HBLK_DURATION_MAX_NS),
249 16,
250 PARAM_FIELD(3, 3),
251 PARAM_FIELD(3, 3),
252 PARAM_FIELD(16, 17)),
253 TV_MODE_PARAMETER(DRM_MODE_ANALOG_PAL,
254 PAL_LINES_NUMBER,
255 PAL_LINE_DURATION_NS,
256 PARAM_RANGE(PAL_HACT_DURATION_MIN_NS,
257 PAL_HACT_DURATION_TYP_NS,
258 PAL_HACT_DURATION_MAX_NS),
259 PARAM_RANGE(PAL_HFP_DURATION_MIN_NS,
260 PAL_HFP_DURATION_TYP_NS,
261 PAL_HFP_DURATION_MAX_NS),
262 PARAM_RANGE(PAL_HSLEN_DURATION_MIN_NS,
263 PAL_HSLEN_DURATION_TYP_NS,
264 PAL_HSLEN_DURATION_MAX_NS),
265 PARAM_RANGE(PAL_HBP_DURATION_MIN_NS,
266 PAL_HBP_DURATION_TYP_NS,
267 PAL_HBP_DURATION_MAX_NS),
268 PARAM_RANGE(PAL_HBLK_DURATION_MIN_NS,
269 PAL_HBLK_DURATION_TYP_NS,
270 PAL_HBLK_DURATION_MAX_NS),
271 12,
272
273 /*
274 * The front porch is actually 6 short sync
275 * pulses for the even field, and 5 for the
276 * odd field. Each sync takes half a life so
277 * the odd field front porch is shorter by
278 * half a line.
279 *
280 * In progressive, we're supposed to use 6
281 * pulses, so we're fine there
282 */
283 PARAM_FIELD(3, 2),
284
285 /*
286 * The vsync length is 5 long sync pulses,
287 * each field taking half a line. We're
288 * shorter for both fields by half a line.
289 *
290 * In progressive, we're supposed to use 5
291 * pulses, so we're off by half
292 * a line.
293 *
294 * In interlace, we're now off by half a line
295 * for the even field and one line for the odd
296 * field.
297 */
298 PARAM_FIELD(3, 3),
299
300 /*
301 * The back porch starts with post-equalizing
302 * pulses, consisting in 5 short sync pulses
303 * for the even field, 4 for the odd field. In
304 * progressive, it's 5 short syncs.
305 *
306 * In progressive, we thus have 2.5 lines,
307 * plus the 0.5 line we were missing
308 * previously, so we should use 3 lines.
309 *
310 * In interlace, the even field is in the
311 * exact same case than progressive. For the
312 * odd field, we should be using 2 lines but
313 * we're one line short, so we'll make up for
314 * it here by using 3.
315 *
316 * The entire blanking area is supposed to
317 * take 25 lines, so we also need to account
318 * for the rest of the blanking area that
319 * can't be in either the front porch or sync
320 * period.
321 */
322 PARAM_FIELD(19, 20)),
323};
324
325static int fill_analog_mode(struct drm_device *dev,
326 struct drm_display_mode *mode,
327 const struct analog_parameters *params,
328 unsigned long pixel_clock_hz,
329 unsigned int hactive,
330 unsigned int vactive,
331 bool interlace)
332{
333 unsigned long pixel_duration_ns = NSEC_PER_SEC / pixel_clock_hz;
334 unsigned int htotal, vtotal;
335 unsigned int max_hact, hact_duration_ns;
336 unsigned int hblk, hblk_duration_ns;
337 unsigned int hfp, hfp_duration_ns;
338 unsigned int hslen, hslen_duration_ns;
339 unsigned int hbp, hbp_duration_ns;
340 unsigned int porches, porches_duration_ns;
341 unsigned int vfp, vfp_min;
342 unsigned int vbp, vbp_min;
343 unsigned int vslen;
344 bool bt601 = false;
345 int porches_rem;
346 u64 result;
347
348 drm_dbg_kms(dev,
349 "Generating a %ux%u%c, %u-line mode with a %lu kHz clock\n",
350 hactive, vactive,
351 interlace ? 'i' : 'p',
352 params->num_lines,
353 pixel_clock_hz / 1000);
354
355 max_hact = params->hact_ns.max / pixel_duration_ns;
356 if (pixel_clock_hz == 13500000 && hactive > max_hact && hactive <= 720) {
357 drm_dbg_kms(dev, "Trying to generate a BT.601 mode. Disabling checks.\n");
358 bt601 = true;
359 }
360
361 /*
362 * Our pixel duration is going to be round down by the division,
363 * so rounding up is probably going to introduce even more
364 * deviation.
365 */
366 result = (u64)params->line_duration_ns * pixel_clock_hz;
367 do_div(result, NSEC_PER_SEC);
368 htotal = result;
369
370 drm_dbg_kms(dev, "Total Horizontal Number of Pixels: %u\n", htotal);
371
372 hact_duration_ns = hactive * pixel_duration_ns;
373 if (!bt601 &&
374 (hact_duration_ns < params->hact_ns.min ||
375 hact_duration_ns > params->hact_ns.max)) {
376 drm_err(dev, "Invalid horizontal active area duration: %uns (min: %u, max %u)\n",
377 hact_duration_ns, params->hact_ns.min, params->hact_ns.max);
378 return -EINVAL;
379 }
380
381 hblk = htotal - hactive;
382 drm_dbg_kms(dev, "Horizontal Blanking Period: %u\n", hblk);
383
384 hblk_duration_ns = hblk * pixel_duration_ns;
385 if (!bt601 &&
386 (hblk_duration_ns < params->hblk_ns.min ||
387 hblk_duration_ns > params->hblk_ns.max)) {
388 drm_err(dev, "Invalid horizontal blanking duration: %uns (min: %u, max %u)\n",
389 hblk_duration_ns, params->hblk_ns.min, params->hblk_ns.max);
390 return -EINVAL;
391 }
392
393 hslen = DIV_ROUND_UP(params->hslen_ns.typ, pixel_duration_ns);
394 drm_dbg_kms(dev, "Horizontal Sync Period: %u\n", hslen);
395
396 hslen_duration_ns = hslen * pixel_duration_ns;
397 if (!bt601 &&
398 (hslen_duration_ns < params->hslen_ns.min ||
399 hslen_duration_ns > params->hslen_ns.max)) {
400 drm_err(dev, "Invalid horizontal sync duration: %uns (min: %u, max %u)\n",
401 hslen_duration_ns, params->hslen_ns.min, params->hslen_ns.max);
402 return -EINVAL;
403 }
404
405 porches = hblk - hslen;
406 drm_dbg_kms(dev, "Remaining horizontal pixels for both porches: %u\n", porches);
407
408 porches_duration_ns = porches * pixel_duration_ns;
409 if (!bt601 &&
410 (porches_duration_ns > (params->hfp_ns.max + params->hbp_ns.max) ||
411 porches_duration_ns < (params->hfp_ns.min + params->hbp_ns.min))) {
412 drm_err(dev, "Invalid horizontal porches duration: %uns\n",
413 porches_duration_ns);
414 return -EINVAL;
415 }
416
417 if (bt601) {
418 hfp = params->bt601_hfp;
419 } else {
420 unsigned int hfp_min = DIV_ROUND_UP(params->hfp_ns.min,
421 pixel_duration_ns);
422 unsigned int hbp_min = DIV_ROUND_UP(params->hbp_ns.min,
423 pixel_duration_ns);
424 int porches_rem = porches - hfp_min - hbp_min;
425
426 hfp = hfp_min + DIV_ROUND_UP(porches_rem, 2);
427 }
428
429 drm_dbg_kms(dev, "Horizontal Front Porch: %u\n", hfp);
430
431 hfp_duration_ns = hfp * pixel_duration_ns;
432 if (!bt601 &&
433 (hfp_duration_ns < params->hfp_ns.min ||
434 hfp_duration_ns > params->hfp_ns.max)) {
435 drm_err(dev, "Invalid horizontal front porch duration: %uns (min: %u, max %u)\n",
436 hfp_duration_ns, params->hfp_ns.min, params->hfp_ns.max);
437 return -EINVAL;
438 }
439
440 hbp = porches - hfp;
441 drm_dbg_kms(dev, "Horizontal Back Porch: %u\n", hbp);
442
443 hbp_duration_ns = hbp * pixel_duration_ns;
444 if (!bt601 &&
445 (hbp_duration_ns < params->hbp_ns.min ||
446 hbp_duration_ns > params->hbp_ns.max)) {
447 drm_err(dev, "Invalid horizontal back porch duration: %uns (min: %u, max %u)\n",
448 hbp_duration_ns, params->hbp_ns.min, params->hbp_ns.max);
449 return -EINVAL;
450 }
451
452 if (htotal != (hactive + hfp + hslen + hbp))
453 return -EINVAL;
454
455 mode->clock = pixel_clock_hz / 1000;
456 mode->hdisplay = hactive;
457 mode->hsync_start = mode->hdisplay + hfp;
458 mode->hsync_end = mode->hsync_start + hslen;
459 mode->htotal = mode->hsync_end + hbp;
460
461 if (interlace) {
462 vfp_min = params->vfp_lines.even + params->vfp_lines.odd;
463 vbp_min = params->vbp_lines.even + params->vbp_lines.odd;
464 vslen = params->vslen_lines.even + params->vslen_lines.odd;
465 } else {
466 /*
467 * By convention, NTSC (aka 525/60) systems start with
468 * the even field, but PAL (aka 625/50) systems start
469 * with the odd one.
470 *
471 * PAL systems also have asymmetric timings between the
472 * even and odd field, while NTSC is symmetric.
473 *
474 * Moreover, if we want to create a progressive mode for
475 * PAL, we need to use the odd field timings.
476 *
477 * Since odd == even for NTSC, we can just use the odd
478 * one all the time to simplify the code a bit.
479 */
480 vfp_min = params->vfp_lines.odd;
481 vbp_min = params->vbp_lines.odd;
482 vslen = params->vslen_lines.odd;
483 }
484
485 drm_dbg_kms(dev, "Vertical Sync Period: %u\n", vslen);
486
487 porches = params->num_lines - vactive - vslen;
488 drm_dbg_kms(dev, "Remaining vertical pixels for both porches: %u\n", porches);
489
490 porches_rem = porches - vfp_min - vbp_min;
491 vfp = vfp_min + (porches_rem / 2);
492 drm_dbg_kms(dev, "Vertical Front Porch: %u\n", vfp);
493
494 vbp = porches - vfp;
495 drm_dbg_kms(dev, "Vertical Back Porch: %u\n", vbp);
496
497 vtotal = vactive + vfp + vslen + vbp;
498 if (params->num_lines != vtotal) {
499 drm_err(dev, "Invalid vertical total: %upx (expected %upx)\n",
500 vtotal, params->num_lines);
501 return -EINVAL;
502 }
503
504 mode->vdisplay = vactive;
505 mode->vsync_start = mode->vdisplay + vfp;
506 mode->vsync_end = mode->vsync_start + vslen;
507 mode->vtotal = mode->vsync_end + vbp;
508
509 if (mode->vtotal != params->num_lines)
510 return -EINVAL;
511
512 mode->type = DRM_MODE_TYPE_DRIVER;
513 mode->flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC;
514 if (interlace)
515 mode->flags |= DRM_MODE_FLAG_INTERLACE;
516
517 drm_mode_set_name(mode);
518
519 drm_dbg_kms(dev, "Generated mode " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
520
521 return 0;
522}
523
524/**
525 * drm_analog_tv_mode - create a display mode for an analog TV
526 * @dev: drm device
527 * @tv_mode: TV Mode standard to create a mode for. See DRM_MODE_TV_MODE_*.
528 * @pixel_clock_hz: Pixel Clock Frequency, in Hertz
529 * @hdisplay: hdisplay size
530 * @vdisplay: vdisplay size
531 * @interlace: whether to compute an interlaced mode
532 *
533 * This function creates a struct drm_display_mode instance suited for
534 * an analog TV output, for one of the usual analog TV modes. Where
535 * this is DRM_MODE_TV_MODE_MONOCHROME, a 625-line mode will be created.
536 *
537 * Note that @hdisplay is larger than the usual constraints for the PAL
538 * and NTSC timings, and we'll choose to ignore most timings constraints
539 * to reach those resolutions.
540 *
541 * Returns:
542 * A pointer to the mode, allocated with drm_mode_create(). Returns NULL
543 * on error.
544 */
545struct drm_display_mode *drm_analog_tv_mode(struct drm_device *dev,
546 enum drm_connector_tv_mode tv_mode,
547 unsigned long pixel_clock_hz,
548 unsigned int hdisplay,
549 unsigned int vdisplay,
550 bool interlace)
551{
552 struct drm_display_mode *mode;
553 enum drm_mode_analog analog;
554 int ret;
555
556 switch (tv_mode) {
557 case DRM_MODE_TV_MODE_NTSC:
558 fallthrough;
559 case DRM_MODE_TV_MODE_NTSC_443:
560 fallthrough;
561 case DRM_MODE_TV_MODE_NTSC_J:
562 fallthrough;
563 case DRM_MODE_TV_MODE_PAL_M:
564 analog = DRM_MODE_ANALOG_NTSC;
565 break;
566
567 case DRM_MODE_TV_MODE_PAL:
568 fallthrough;
569 case DRM_MODE_TV_MODE_PAL_N:
570 fallthrough;
571 case DRM_MODE_TV_MODE_SECAM:
572 fallthrough;
573 case DRM_MODE_TV_MODE_MONOCHROME:
574 analog = DRM_MODE_ANALOG_PAL;
575 break;
576
577 default:
578 return NULL;
579 }
580
581 mode = drm_mode_create(dev);
582 if (!mode)
583 return NULL;
584
585 ret = fill_analog_mode(dev, mode,
586 &tv_modes_parameters[analog],
587 pixel_clock_hz, hdisplay, vdisplay, interlace);
588 if (ret)
589 goto err_free_mode;
590
591 return mode;
592
593err_free_mode:
594 drm_mode_destroy(dev, mode);
595 return NULL;
596}
597EXPORT_SYMBOL(drm_analog_tv_mode);
598
599/**
600 * drm_cvt_mode -create a modeline based on the CVT algorithm
601 * @dev: drm device
602 * @hdisplay: hdisplay size
603 * @vdisplay: vdisplay size
604 * @vrefresh: vrefresh rate
605 * @reduced: whether to use reduced blanking
606 * @interlaced: whether to compute an interlaced mode
607 * @margins: whether to add margins (borders)
608 *
609 * This function is called to generate the modeline based on CVT algorithm
610 * according to the hdisplay, vdisplay, vrefresh.
611 * It is based from the VESA(TM) Coordinated Video Timing Generator by
612 * Graham Loveridge April 9, 2003 available at
613 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
614 *
615 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
616 * What I have done is to translate it by using integer calculation.
617 *
618 * Returns:
619 * The modeline based on the CVT algorithm stored in a drm_display_mode object.
620 * The display mode object is allocated with drm_mode_create(). Returns NULL
621 * when no mode could be allocated.
622 */
623struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
624 int vdisplay, int vrefresh,
625 bool reduced, bool interlaced, bool margins)
626{
627#define HV_FACTOR 1000
628 /* 1) top/bottom margin size (% of height) - default: 1.8, */
629#define CVT_MARGIN_PERCENTAGE 18
630 /* 2) character cell horizontal granularity (pixels) - default 8 */
631#define CVT_H_GRANULARITY 8
632 /* 3) Minimum vertical porch (lines) - default 3 */
633#define CVT_MIN_V_PORCH 3
634 /* 4) Minimum number of vertical back porch lines - default 6 */
635#define CVT_MIN_V_BPORCH 6
636 /* Pixel Clock step (kHz) */
637#define CVT_CLOCK_STEP 250
638 struct drm_display_mode *drm_mode;
639 unsigned int vfieldrate, hperiod;
640 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
641 int interlace;
642 u64 tmp;
643
644 if (!hdisplay || !vdisplay)
645 return NULL;
646
647 /* allocate the drm_display_mode structure. If failure, we will
648 * return directly
649 */
650 drm_mode = drm_mode_create(dev);
651 if (!drm_mode)
652 return NULL;
653
654 /* the CVT default refresh rate is 60Hz */
655 if (!vrefresh)
656 vrefresh = 60;
657
658 /* the required field fresh rate */
659 if (interlaced)
660 vfieldrate = vrefresh * 2;
661 else
662 vfieldrate = vrefresh;
663
664 /* horizontal pixels */
665 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
666
667 /* determine the left&right borders */
668 hmargin = 0;
669 if (margins) {
670 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
671 hmargin -= hmargin % CVT_H_GRANULARITY;
672 }
673 /* find the total active pixels */
674 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
675
676 /* find the number of lines per field */
677 if (interlaced)
678 vdisplay_rnd = vdisplay / 2;
679 else
680 vdisplay_rnd = vdisplay;
681
682 /* find the top & bottom borders */
683 vmargin = 0;
684 if (margins)
685 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
686
687 drm_mode->vdisplay = vdisplay + 2 * vmargin;
688
689 /* Interlaced */
690 if (interlaced)
691 interlace = 1;
692 else
693 interlace = 0;
694
695 /* Determine VSync Width from aspect ratio */
696 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
697 vsync = 4;
698 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
699 vsync = 5;
700 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
701 vsync = 6;
702 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
703 vsync = 7;
704 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
705 vsync = 7;
706 else /* custom */
707 vsync = 10;
708
709 if (!reduced) {
710 /* simplify the GTF calculation */
711 /* 4) Minimum time of vertical sync + back porch interval (µs)
712 * default 550.0
713 */
714 int tmp1, tmp2;
715#define CVT_MIN_VSYNC_BP 550
716 /* 3) Nominal HSync width (% of line period) - default 8 */
717#define CVT_HSYNC_PERCENTAGE 8
718 unsigned int hblank_percentage;
719 int vsyncandback_porch, __maybe_unused vback_porch, hblank;
720
721 /* estimated the horizontal period */
722 tmp1 = HV_FACTOR * 1000000 -
723 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
724 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
725 interlace;
726 hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
727
728 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
729 /* 9. Find number of lines in sync + backporch */
730 if (tmp1 < (vsync + CVT_MIN_V_PORCH))
731 vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
732 else
733 vsyncandback_porch = tmp1;
734 /* 10. Find number of lines in back porch */
735 vback_porch = vsyncandback_porch - vsync;
736 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
737 vsyncandback_porch + CVT_MIN_V_PORCH;
738 /* 5) Definition of Horizontal blanking time limitation */
739 /* Gradient (%/kHz) - default 600 */
740#define CVT_M_FACTOR 600
741 /* Offset (%) - default 40 */
742#define CVT_C_FACTOR 40
743 /* Blanking time scaling factor - default 128 */
744#define CVT_K_FACTOR 128
745 /* Scaling factor weighting - default 20 */
746#define CVT_J_FACTOR 20
747#define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
748#define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
749 CVT_J_FACTOR)
750 /* 12. Find ideal blanking duty cycle from formula */
751 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
752 hperiod / 1000;
753 /* 13. Blanking time */
754 if (hblank_percentage < 20 * HV_FACTOR)
755 hblank_percentage = 20 * HV_FACTOR;
756 hblank = drm_mode->hdisplay * hblank_percentage /
757 (100 * HV_FACTOR - hblank_percentage);
758 hblank -= hblank % (2 * CVT_H_GRANULARITY);
759 /* 14. find the total pixels per line */
760 drm_mode->htotal = drm_mode->hdisplay + hblank;
761 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
762 drm_mode->hsync_start = drm_mode->hsync_end -
763 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
764 drm_mode->hsync_start += CVT_H_GRANULARITY -
765 drm_mode->hsync_start % CVT_H_GRANULARITY;
766 /* fill the Vsync values */
767 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
768 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
769 } else {
770 /* Reduced blanking */
771 /* Minimum vertical blanking interval time (µs)- default 460 */
772#define CVT_RB_MIN_VBLANK 460
773 /* Fixed number of clocks for horizontal sync */
774#define CVT_RB_H_SYNC 32
775 /* Fixed number of clocks for horizontal blanking */
776#define CVT_RB_H_BLANK 160
777 /* Fixed number of lines for vertical front porch - default 3*/
778#define CVT_RB_VFPORCH 3
779 int vbilines;
780 int tmp1, tmp2;
781 /* 8. Estimate Horizontal period. */
782 tmp1 = HV_FACTOR * 1000000 -
783 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
784 tmp2 = vdisplay_rnd + 2 * vmargin;
785 hperiod = tmp1 / (tmp2 * vfieldrate);
786 /* 9. Find number of lines in vertical blanking */
787 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
788 /* 10. Check if vertical blanking is sufficient */
789 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
790 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
791 /* 11. Find total number of lines in vertical field */
792 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
793 /* 12. Find total number of pixels in a line */
794 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
795 /* Fill in HSync values */
796 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
797 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
798 /* Fill in VSync values */
799 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
800 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
801 }
802 /* 15/13. Find pixel clock frequency (kHz for xf86) */
803 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */
804 tmp *= HV_FACTOR * 1000;
805 do_div(tmp, hperiod);
806 tmp -= drm_mode->clock % CVT_CLOCK_STEP;
807 drm_mode->clock = tmp;
808 /* 18/16. Find actual vertical frame frequency */
809 /* ignore - just set the mode flag for interlaced */
810 if (interlaced) {
811 drm_mode->vtotal *= 2;
812 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
813 }
814 /* Fill the mode line name */
815 drm_mode_set_name(drm_mode);
816 if (reduced)
817 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
818 DRM_MODE_FLAG_NVSYNC);
819 else
820 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
821 DRM_MODE_FLAG_NHSYNC);
822
823 return drm_mode;
824}
825EXPORT_SYMBOL(drm_cvt_mode);
826
827/**
828 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm
829 * @dev: drm device
830 * @hdisplay: hdisplay size
831 * @vdisplay: vdisplay size
832 * @vrefresh: vrefresh rate.
833 * @interlaced: whether to compute an interlaced mode
834 * @margins: desired margin (borders) size
835 * @GTF_M: extended GTF formula parameters
836 * @GTF_2C: extended GTF formula parameters
837 * @GTF_K: extended GTF formula parameters
838 * @GTF_2J: extended GTF formula parameters
839 *
840 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
841 * in here multiplied by two. For a C of 40, pass in 80.
842 *
843 * Returns:
844 * The modeline based on the full GTF algorithm stored in a drm_display_mode object.
845 * The display mode object is allocated with drm_mode_create(). Returns NULL
846 * when no mode could be allocated.
847 */
848struct drm_display_mode *
849drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
850 int vrefresh, bool interlaced, int margins,
851 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
852{ /* 1) top/bottom margin size (% of height) - default: 1.8, */
853#define GTF_MARGIN_PERCENTAGE 18
854 /* 2) character cell horizontal granularity (pixels) - default 8 */
855#define GTF_CELL_GRAN 8
856 /* 3) Minimum vertical porch (lines) - default 3 */
857#define GTF_MIN_V_PORCH 1
858 /* width of vsync in lines */
859#define V_SYNC_RQD 3
860 /* width of hsync as % of total line */
861#define H_SYNC_PERCENT 8
862 /* min time of vsync + back porch (microsec) */
863#define MIN_VSYNC_PLUS_BP 550
864 /* C' and M' are part of the Blanking Duty Cycle computation */
865#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
866#define GTF_M_PRIME (GTF_K * GTF_M / 256)
867 struct drm_display_mode *drm_mode;
868 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
869 int top_margin, bottom_margin;
870 int interlace;
871 unsigned int hfreq_est;
872 int vsync_plus_bp, __maybe_unused vback_porch;
873 unsigned int vtotal_lines, __maybe_unused vfieldrate_est;
874 unsigned int __maybe_unused hperiod;
875 unsigned int vfield_rate, __maybe_unused vframe_rate;
876 int left_margin, right_margin;
877 unsigned int total_active_pixels, ideal_duty_cycle;
878 unsigned int hblank, total_pixels, pixel_freq;
879 int hsync, hfront_porch, vodd_front_porch_lines;
880 unsigned int tmp1, tmp2;
881
882 if (!hdisplay || !vdisplay)
883 return NULL;
884
885 drm_mode = drm_mode_create(dev);
886 if (!drm_mode)
887 return NULL;
888
889 /* 1. In order to give correct results, the number of horizontal
890 * pixels requested is first processed to ensure that it is divisible
891 * by the character size, by rounding it to the nearest character
892 * cell boundary:
893 */
894 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
895 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
896
897 /* 2. If interlace is requested, the number of vertical lines assumed
898 * by the calculation must be halved, as the computation calculates
899 * the number of vertical lines per field.
900 */
901 if (interlaced)
902 vdisplay_rnd = vdisplay / 2;
903 else
904 vdisplay_rnd = vdisplay;
905
906 /* 3. Find the frame rate required: */
907 if (interlaced)
908 vfieldrate_rqd = vrefresh * 2;
909 else
910 vfieldrate_rqd = vrefresh;
911
912 /* 4. Find number of lines in Top margin: */
913 top_margin = 0;
914 if (margins)
915 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
916 1000;
917 /* 5. Find number of lines in bottom margin: */
918 bottom_margin = top_margin;
919
920 /* 6. If interlace is required, then set variable interlace: */
921 if (interlaced)
922 interlace = 1;
923 else
924 interlace = 0;
925
926 /* 7. Estimate the Horizontal frequency */
927 {
928 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
929 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
930 2 + interlace;
931 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
932 }
933
934 /* 8. Find the number of lines in V sync + back porch */
935 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
936 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
937 vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
938 /* 9. Find the number of lines in V back porch alone: */
939 vback_porch = vsync_plus_bp - V_SYNC_RQD;
940 /* 10. Find the total number of lines in Vertical field period: */
941 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
942 vsync_plus_bp + GTF_MIN_V_PORCH;
943 /* 11. Estimate the Vertical field frequency: */
944 vfieldrate_est = hfreq_est / vtotal_lines;
945 /* 12. Find the actual horizontal period: */
946 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
947
948 /* 13. Find the actual Vertical field frequency: */
949 vfield_rate = hfreq_est / vtotal_lines;
950 /* 14. Find the Vertical frame frequency: */
951 if (interlaced)
952 vframe_rate = vfield_rate / 2;
953 else
954 vframe_rate = vfield_rate;
955 /* 15. Find number of pixels in left margin: */
956 if (margins)
957 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
958 1000;
959 else
960 left_margin = 0;
961
962 /* 16.Find number of pixels in right margin: */
963 right_margin = left_margin;
964 /* 17.Find total number of active pixels in image and left and right */
965 total_active_pixels = hdisplay_rnd + left_margin + right_margin;
966 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
967 ideal_duty_cycle = GTF_C_PRIME * 1000 -
968 (GTF_M_PRIME * 1000000 / hfreq_est);
969 /* 19.Find the number of pixels in the blanking time to the nearest
970 * double character cell: */
971 hblank = total_active_pixels * ideal_duty_cycle /
972 (100000 - ideal_duty_cycle);
973 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
974 hblank = hblank * 2 * GTF_CELL_GRAN;
975 /* 20.Find total number of pixels: */
976 total_pixels = total_active_pixels + hblank;
977 /* 21.Find pixel clock frequency: */
978 pixel_freq = total_pixels * hfreq_est / 1000;
979 /* Stage 1 computations are now complete; I should really pass
980 * the results to another function and do the Stage 2 computations,
981 * but I only need a few more values so I'll just append the
982 * computations here for now */
983 /* 17. Find the number of pixels in the horizontal sync period: */
984 hsync = H_SYNC_PERCENT * total_pixels / 100;
985 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
986 hsync = hsync * GTF_CELL_GRAN;
987 /* 18. Find the number of pixels in horizontal front porch period */
988 hfront_porch = hblank / 2 - hsync;
989 /* 36. Find the number of lines in the odd front porch period: */
990 vodd_front_porch_lines = GTF_MIN_V_PORCH ;
991
992 /* finally, pack the results in the mode struct */
993 drm_mode->hdisplay = hdisplay_rnd;
994 drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
995 drm_mode->hsync_end = drm_mode->hsync_start + hsync;
996 drm_mode->htotal = total_pixels;
997 drm_mode->vdisplay = vdisplay_rnd;
998 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
999 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
1000 drm_mode->vtotal = vtotal_lines;
1001
1002 drm_mode->clock = pixel_freq;
1003
1004 if (interlaced) {
1005 drm_mode->vtotal *= 2;
1006 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
1007 }
1008
1009 drm_mode_set_name(drm_mode);
1010 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
1011 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
1012 else
1013 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
1014
1015 return drm_mode;
1016}
1017EXPORT_SYMBOL(drm_gtf_mode_complex);
1018
1019/**
1020 * drm_gtf_mode - create the modeline based on the GTF algorithm
1021 * @dev: drm device
1022 * @hdisplay: hdisplay size
1023 * @vdisplay: vdisplay size
1024 * @vrefresh: vrefresh rate.
1025 * @interlaced: whether to compute an interlaced mode
1026 * @margins: desired margin (borders) size
1027 *
1028 * return the modeline based on GTF algorithm
1029 *
1030 * This function is to create the modeline based on the GTF algorithm.
1031 * Generalized Timing Formula is derived from:
1032 *
1033 * GTF Spreadsheet by Andy Morrish (1/5/97)
1034 * available at https://www.vesa.org
1035 *
1036 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
1037 * What I have done is to translate it by using integer calculation.
1038 * I also refer to the function of fb_get_mode in the file of
1039 * drivers/video/fbmon.c
1040 *
1041 * Standard GTF parameters::
1042 *
1043 * M = 600
1044 * C = 40
1045 * K = 128
1046 * J = 20
1047 *
1048 * Returns:
1049 * The modeline based on the GTF algorithm stored in a drm_display_mode object.
1050 * The display mode object is allocated with drm_mode_create(). Returns NULL
1051 * when no mode could be allocated.
1052 */
1053struct drm_display_mode *
1054drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
1055 bool interlaced, int margins)
1056{
1057 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh,
1058 interlaced, margins,
1059 600, 40 * 2, 128, 20 * 2);
1060}
1061EXPORT_SYMBOL(drm_gtf_mode);
1062
1063#ifdef CONFIG_VIDEOMODE_HELPERS
1064/**
1065 * drm_display_mode_from_videomode - fill in @dmode using @vm,
1066 * @vm: videomode structure to use as source
1067 * @dmode: drm_display_mode structure to use as destination
1068 *
1069 * Fills out @dmode using the display mode specified in @vm.
1070 */
1071void drm_display_mode_from_videomode(const struct videomode *vm,
1072 struct drm_display_mode *dmode)
1073{
1074 dmode->hdisplay = vm->hactive;
1075 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch;
1076 dmode->hsync_end = dmode->hsync_start + vm->hsync_len;
1077 dmode->htotal = dmode->hsync_end + vm->hback_porch;
1078
1079 dmode->vdisplay = vm->vactive;
1080 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch;
1081 dmode->vsync_end = dmode->vsync_start + vm->vsync_len;
1082 dmode->vtotal = dmode->vsync_end + vm->vback_porch;
1083
1084 dmode->clock = vm->pixelclock / 1000;
1085
1086 dmode->flags = 0;
1087 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH)
1088 dmode->flags |= DRM_MODE_FLAG_PHSYNC;
1089 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW)
1090 dmode->flags |= DRM_MODE_FLAG_NHSYNC;
1091 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH)
1092 dmode->flags |= DRM_MODE_FLAG_PVSYNC;
1093 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW)
1094 dmode->flags |= DRM_MODE_FLAG_NVSYNC;
1095 if (vm->flags & DISPLAY_FLAGS_INTERLACED)
1096 dmode->flags |= DRM_MODE_FLAG_INTERLACE;
1097 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN)
1098 dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
1099 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
1100 dmode->flags |= DRM_MODE_FLAG_DBLCLK;
1101 drm_mode_set_name(dmode);
1102}
1103EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
1104
1105/**
1106 * drm_display_mode_to_videomode - fill in @vm using @dmode,
1107 * @dmode: drm_display_mode structure to use as source
1108 * @vm: videomode structure to use as destination
1109 *
1110 * Fills out @vm using the display mode specified in @dmode.
1111 */
1112void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
1113 struct videomode *vm)
1114{
1115 vm->hactive = dmode->hdisplay;
1116 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay;
1117 vm->hsync_len = dmode->hsync_end - dmode->hsync_start;
1118 vm->hback_porch = dmode->htotal - dmode->hsync_end;
1119
1120 vm->vactive = dmode->vdisplay;
1121 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay;
1122 vm->vsync_len = dmode->vsync_end - dmode->vsync_start;
1123 vm->vback_porch = dmode->vtotal - dmode->vsync_end;
1124
1125 vm->pixelclock = dmode->clock * 1000;
1126
1127 vm->flags = 0;
1128 if (dmode->flags & DRM_MODE_FLAG_PHSYNC)
1129 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
1130 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC)
1131 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;
1132 if (dmode->flags & DRM_MODE_FLAG_PVSYNC)
1133 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
1134 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC)
1135 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;
1136 if (dmode->flags & DRM_MODE_FLAG_INTERLACE)
1137 vm->flags |= DISPLAY_FLAGS_INTERLACED;
1138 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN)
1139 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1140 if (dmode->flags & DRM_MODE_FLAG_DBLCLK)
1141 vm->flags |= DISPLAY_FLAGS_DOUBLECLK;
1142}
1143EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
1144
1145/**
1146 * drm_bus_flags_from_videomode - extract information about pixelclk and
1147 * DE polarity from videomode and store it in a separate variable
1148 * @vm: videomode structure to use
1149 * @bus_flags: information about pixelclk, sync and DE polarity will be stored
1150 * here
1151 *
1152 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE
1153 * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS
1154 * found in @vm
1155 */
1156void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags)
1157{
1158 *bus_flags = 0;
1159 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
1160 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE;
1161 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
1162 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE;
1163
1164 if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE)
1165 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE;
1166 if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE)
1167 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE;
1168
1169 if (vm->flags & DISPLAY_FLAGS_DE_LOW)
1170 *bus_flags |= DRM_BUS_FLAG_DE_LOW;
1171 if (vm->flags & DISPLAY_FLAGS_DE_HIGH)
1172 *bus_flags |= DRM_BUS_FLAG_DE_HIGH;
1173}
1174EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
1175
1176#ifdef CONFIG_OF
1177/**
1178 * of_get_drm_display_mode - get a drm_display_mode from devicetree
1179 * @np: device_node with the timing specification
1180 * @dmode: will be set to the return value
1181 * @bus_flags: information about pixelclk, sync and DE polarity
1182 * @index: index into the list of display timings in devicetree
1183 *
1184 * This function is expensive and should only be used, if only one mode is to be
1185 * read from DT. To get multiple modes start with of_get_display_timings and
1186 * work with that instead.
1187 *
1188 * Returns:
1189 * 0 on success, a negative errno code when no of videomode node was found.
1190 */
1191int of_get_drm_display_mode(struct device_node *np,
1192 struct drm_display_mode *dmode, u32 *bus_flags,
1193 int index)
1194{
1195 struct videomode vm;
1196 int ret;
1197
1198 ret = of_get_videomode(np, &vm, index);
1199 if (ret)
1200 return ret;
1201
1202 drm_display_mode_from_videomode(&vm, dmode);
1203 if (bus_flags)
1204 drm_bus_flags_from_videomode(&vm, bus_flags);
1205
1206 pr_debug("%pOF: got %dx%d display mode: " DRM_MODE_FMT "\n",
1207 np, vm.hactive, vm.vactive, DRM_MODE_ARG(dmode));
1208
1209 return 0;
1210}
1211EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
1212
1213/**
1214 * of_get_drm_panel_display_mode - get a panel-timing drm_display_mode from devicetree
1215 * @np: device_node with the panel-timing specification
1216 * @dmode: will be set to the return value
1217 * @bus_flags: information about pixelclk, sync and DE polarity
1218 *
1219 * The mandatory Device Tree properties width-mm and height-mm
1220 * are read and set on the display mode.
1221 *
1222 * Returns:
1223 * Zero on success, negative error code on failure.
1224 */
1225int of_get_drm_panel_display_mode(struct device_node *np,
1226 struct drm_display_mode *dmode, u32 *bus_flags)
1227{
1228 u32 width_mm = 0, height_mm = 0;
1229 struct display_timing timing;
1230 struct videomode vm;
1231 int ret;
1232
1233 ret = of_get_display_timing(np, "panel-timing", &timing);
1234 if (ret)
1235 return ret;
1236
1237 videomode_from_timing(&timing, &vm);
1238
1239 memset(dmode, 0, sizeof(*dmode));
1240 drm_display_mode_from_videomode(&vm, dmode);
1241 if (bus_flags)
1242 drm_bus_flags_from_videomode(&vm, bus_flags);
1243
1244 ret = of_property_read_u32(np, "width-mm", &width_mm);
1245 if (ret)
1246 return ret;
1247
1248 ret = of_property_read_u32(np, "height-mm", &height_mm);
1249 if (ret)
1250 return ret;
1251
1252 dmode->width_mm = width_mm;
1253 dmode->height_mm = height_mm;
1254
1255 pr_debug(DRM_MODE_FMT "\n", DRM_MODE_ARG(dmode));
1256
1257 return 0;
1258}
1259EXPORT_SYMBOL_GPL(of_get_drm_panel_display_mode);
1260#endif /* CONFIG_OF */
1261#endif /* CONFIG_VIDEOMODE_HELPERS */
1262
1263/**
1264 * drm_mode_set_name - set the name on a mode
1265 * @mode: name will be set in this mode
1266 *
1267 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay>
1268 * with an optional 'i' suffix for interlaced modes.
1269 */
1270void drm_mode_set_name(struct drm_display_mode *mode)
1271{
1272 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1273
1274 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
1275 mode->hdisplay, mode->vdisplay,
1276 interlaced ? "i" : "");
1277}
1278EXPORT_SYMBOL(drm_mode_set_name);
1279
1280/**
1281 * drm_mode_vrefresh - get the vrefresh of a mode
1282 * @mode: mode
1283 *
1284 * Returns:
1285 * @modes's vrefresh rate in Hz, rounded to the nearest integer.
1286 */
1287int drm_mode_vrefresh(const struct drm_display_mode *mode)
1288{
1289 unsigned int num = 1, den = 1;
1290
1291 if (mode->htotal == 0 || mode->vtotal == 0)
1292 return 0;
1293
1294 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
1295 num *= 2;
1296 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
1297 den *= 2;
1298 if (mode->vscan > 1)
1299 den *= mode->vscan;
1300
1301 if (check_mul_overflow(mode->clock, num, &num))
1302 return 0;
1303
1304 if (check_mul_overflow(mode->htotal * mode->vtotal, den, &den))
1305 return 0;
1306
1307 return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(num, 1000), den);
1308}
1309EXPORT_SYMBOL(drm_mode_vrefresh);
1310
1311/**
1312 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode
1313 * @mode: mode to query
1314 * @hdisplay: hdisplay value to fill in
1315 * @vdisplay: vdisplay value to fill in
1316 *
1317 * The vdisplay value will be doubled if the specified mode is a stereo mode of
1318 * the appropriate layout.
1319 */
1320void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
1321 int *hdisplay, int *vdisplay)
1322{
1323 struct drm_display_mode adjusted;
1324
1325 drm_mode_init(&adjusted, mode);
1326
1327 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
1328 *hdisplay = adjusted.crtc_hdisplay;
1329 *vdisplay = adjusted.crtc_vdisplay;
1330}
1331EXPORT_SYMBOL(drm_mode_get_hv_timing);
1332
1333/**
1334 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
1335 * @p: mode
1336 * @adjust_flags: a combination of adjustment flags
1337 *
1338 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
1339 *
1340 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
1341 * interlaced modes.
1342 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
1343 * buffers containing two eyes (only adjust the timings when needed, eg. for
1344 * "frame packing" or "side by side full").
1345 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not*
1346 * be performed for doublescan and vscan > 1 modes respectively.
1347 */
1348void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
1349{
1350 if (!p)
1351 return;
1352
1353 p->crtc_clock = p->clock;
1354 p->crtc_hdisplay = p->hdisplay;
1355 p->crtc_hsync_start = p->hsync_start;
1356 p->crtc_hsync_end = p->hsync_end;
1357 p->crtc_htotal = p->htotal;
1358 p->crtc_hskew = p->hskew;
1359 p->crtc_vdisplay = p->vdisplay;
1360 p->crtc_vsync_start = p->vsync_start;
1361 p->crtc_vsync_end = p->vsync_end;
1362 p->crtc_vtotal = p->vtotal;
1363
1364 if (p->flags & DRM_MODE_FLAG_INTERLACE) {
1365 if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
1366 p->crtc_vdisplay /= 2;
1367 p->crtc_vsync_start /= 2;
1368 p->crtc_vsync_end /= 2;
1369 p->crtc_vtotal /= 2;
1370 }
1371 }
1372
1373 if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
1374 if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
1375 p->crtc_vdisplay *= 2;
1376 p->crtc_vsync_start *= 2;
1377 p->crtc_vsync_end *= 2;
1378 p->crtc_vtotal *= 2;
1379 }
1380 }
1381
1382 if (!(adjust_flags & CRTC_NO_VSCAN)) {
1383 if (p->vscan > 1) {
1384 p->crtc_vdisplay *= p->vscan;
1385 p->crtc_vsync_start *= p->vscan;
1386 p->crtc_vsync_end *= p->vscan;
1387 p->crtc_vtotal *= p->vscan;
1388 }
1389 }
1390
1391 if (adjust_flags & CRTC_STEREO_DOUBLE) {
1392 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
1393
1394 switch (layout) {
1395 case DRM_MODE_FLAG_3D_FRAME_PACKING:
1396 p->crtc_clock *= 2;
1397 p->crtc_vdisplay += p->crtc_vtotal;
1398 p->crtc_vsync_start += p->crtc_vtotal;
1399 p->crtc_vsync_end += p->crtc_vtotal;
1400 p->crtc_vtotal += p->crtc_vtotal;
1401 break;
1402 }
1403 }
1404
1405 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
1406 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
1407 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
1408 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
1409}
1410EXPORT_SYMBOL(drm_mode_set_crtcinfo);
1411
1412/**
1413 * drm_mode_copy - copy the mode
1414 * @dst: mode to overwrite
1415 * @src: mode to copy
1416 *
1417 * Copy an existing mode into another mode, preserving the
1418 * list head of the destination mode.
1419 */
1420void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
1421{
1422 struct list_head head = dst->head;
1423
1424 *dst = *src;
1425 dst->head = head;
1426}
1427EXPORT_SYMBOL(drm_mode_copy);
1428
1429/**
1430 * drm_mode_init - initialize the mode from another mode
1431 * @dst: mode to overwrite
1432 * @src: mode to copy
1433 *
1434 * Copy an existing mode into another mode, zeroing the
1435 * list head of the destination mode. Typically used
1436 * to guarantee the list head is not left with stack
1437 * garbage in on-stack modes.
1438 */
1439void drm_mode_init(struct drm_display_mode *dst, const struct drm_display_mode *src)
1440{
1441 memset(dst, 0, sizeof(*dst));
1442 drm_mode_copy(dst, src);
1443}
1444EXPORT_SYMBOL(drm_mode_init);
1445
1446/**
1447 * drm_mode_duplicate - allocate and duplicate an existing mode
1448 * @dev: drm_device to allocate the duplicated mode for
1449 * @mode: mode to duplicate
1450 *
1451 * Just allocate a new mode, copy the existing mode into it, and return
1452 * a pointer to it. Used to create new instances of established modes.
1453 *
1454 * Returns:
1455 * Pointer to duplicated mode on success, NULL on error.
1456 */
1457struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
1458 const struct drm_display_mode *mode)
1459{
1460 struct drm_display_mode *nmode;
1461
1462 nmode = drm_mode_create(dev);
1463 if (!nmode)
1464 return NULL;
1465
1466 drm_mode_copy(nmode, mode);
1467
1468 return nmode;
1469}
1470EXPORT_SYMBOL(drm_mode_duplicate);
1471
1472static bool drm_mode_match_timings_vrr(const struct drm_display_mode *mode1,
1473 const struct drm_display_mode *mode2)
1474{
1475 int mode1_vsync_start_offset = mode1->vtotal - mode1->vsync_start;
1476 int mode1_vsync_end_offset = mode1->vtotal - mode1->vsync_end;
1477 int mode2_vsync_start_offset = mode2->vtotal - mode2->vsync_start;
1478 int mode2_vsync_end_offset = mode2->vtotal - mode2->vsync_end;
1479
1480 return mode1->hdisplay == mode2->hdisplay &&
1481 mode1->hsync_start == mode2->hsync_start &&
1482 mode1->hsync_end == mode2->hsync_end &&
1483 mode1->htotal == mode2->htotal &&
1484 mode1->hskew == mode2->hskew &&
1485 mode1->vdisplay == mode2->vdisplay &&
1486 mode1_vsync_start_offset == mode2_vsync_start_offset &&
1487 mode1_vsync_end_offset == mode2_vsync_end_offset &&
1488 mode1->vscan == mode2->vscan;
1489}
1490
1491static bool drm_mode_match_timings(const struct drm_display_mode *mode1,
1492 const struct drm_display_mode *mode2)
1493{
1494 return mode1->hdisplay == mode2->hdisplay &&
1495 mode1->hsync_start == mode2->hsync_start &&
1496 mode1->hsync_end == mode2->hsync_end &&
1497 mode1->htotal == mode2->htotal &&
1498 mode1->hskew == mode2->hskew &&
1499 mode1->vdisplay == mode2->vdisplay &&
1500 mode1->vsync_start == mode2->vsync_start &&
1501 mode1->vsync_end == mode2->vsync_end &&
1502 mode1->vtotal == mode2->vtotal &&
1503 mode1->vscan == mode2->vscan;
1504}
1505
1506static bool drm_mode_match_clock(const struct drm_display_mode *mode1,
1507 const struct drm_display_mode *mode2)
1508{
1509 /*
1510 * do clock check convert to PICOS
1511 * so fb modes get matched the same
1512 */
1513 if (mode1->clock && mode2->clock)
1514 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock);
1515 else
1516 return mode1->clock == mode2->clock;
1517}
1518
1519static bool drm_mode_match_flags(const struct drm_display_mode *mode1,
1520 const struct drm_display_mode *mode2)
1521{
1522 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
1523 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK);
1524}
1525
1526static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1,
1527 const struct drm_display_mode *mode2)
1528{
1529 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) ==
1530 (mode2->flags & DRM_MODE_FLAG_3D_MASK);
1531}
1532
1533static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1,
1534 const struct drm_display_mode *mode2)
1535{
1536 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio;
1537}
1538
1539/**
1540 * drm_mode_match - test modes for (partial) equality
1541 * @mode1: first mode
1542 * @mode2: second mode
1543 * @match_flags: which parts need to match (DRM_MODE_MATCH_*)
1544 *
1545 * Check to see if @mode1 and @mode2 are equivalent.
1546 *
1547 * Returns:
1548 * True if the modes are (partially) equal, false otherwise.
1549 */
1550bool drm_mode_match(const struct drm_display_mode *mode1,
1551 const struct drm_display_mode *mode2,
1552 unsigned int match_flags)
1553{
1554 if (!mode1 && !mode2)
1555 return true;
1556
1557 if (!mode1 || !mode2)
1558 return false;
1559
1560 if (match_flags & DRM_MODE_MATCH_TIMINGS_VRR &&
1561 !drm_mode_match_timings_vrr(mode1, mode2))
1562 return false;
1563
1564 if (match_flags & DRM_MODE_MATCH_TIMINGS &&
1565 !drm_mode_match_timings(mode1, mode2))
1566 return false;
1567
1568 if (match_flags & DRM_MODE_MATCH_CLOCK &&
1569 !drm_mode_match_clock(mode1, mode2))
1570 return false;
1571
1572 if (match_flags & DRM_MODE_MATCH_FLAGS &&
1573 !drm_mode_match_flags(mode1, mode2))
1574 return false;
1575
1576 if (match_flags & DRM_MODE_MATCH_3D_FLAGS &&
1577 !drm_mode_match_3d_flags(mode1, mode2))
1578 return false;
1579
1580 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO &&
1581 !drm_mode_match_aspect_ratio(mode1, mode2))
1582 return false;
1583
1584 return true;
1585}
1586EXPORT_SYMBOL(drm_mode_match);
1587
1588/**
1589 * drm_mode_equal - test modes for equality
1590 * @mode1: first mode
1591 * @mode2: second mode
1592 *
1593 * Check to see if @mode1 and @mode2 are equivalent.
1594 *
1595 * Returns:
1596 * True if the modes are equal, false otherwise.
1597 */
1598bool drm_mode_equal(const struct drm_display_mode *mode1,
1599 const struct drm_display_mode *mode2)
1600{
1601 return drm_mode_match(mode1, mode2,
1602 DRM_MODE_MATCH_TIMINGS |
1603 DRM_MODE_MATCH_CLOCK |
1604 DRM_MODE_MATCH_FLAGS |
1605 DRM_MODE_MATCH_3D_FLAGS|
1606 DRM_MODE_MATCH_ASPECT_RATIO);
1607}
1608EXPORT_SYMBOL(drm_mode_equal);
1609
1610/**
1611 * drm_mode_equal_no_clocks - test modes for equality
1612 * @mode1: first mode
1613 * @mode2: second mode
1614 *
1615 * Check to see if @mode1 and @mode2 are equivalent, but
1616 * don't check the pixel clocks.
1617 *
1618 * Returns:
1619 * True if the modes are equal, false otherwise.
1620 */
1621bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
1622 const struct drm_display_mode *mode2)
1623{
1624 return drm_mode_match(mode1, mode2,
1625 DRM_MODE_MATCH_TIMINGS |
1626 DRM_MODE_MATCH_FLAGS |
1627 DRM_MODE_MATCH_3D_FLAGS);
1628}
1629EXPORT_SYMBOL(drm_mode_equal_no_clocks);
1630
1631/**
1632 * drm_mode_equal_no_clocks_no_stereo - test modes for equality
1633 * @mode1: first mode
1634 * @mode2: second mode
1635 *
1636 * Check to see if @mode1 and @mode2 are equivalent, but
1637 * don't check the pixel clocks nor the stereo layout.
1638 *
1639 * Returns:
1640 * True if the modes are equal, false otherwise.
1641 */
1642bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
1643 const struct drm_display_mode *mode2)
1644{
1645 return drm_mode_match(mode1, mode2,
1646 DRM_MODE_MATCH_TIMINGS |
1647 DRM_MODE_MATCH_FLAGS);
1648}
1649EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
1650
1651static enum drm_mode_status
1652drm_mode_validate_basic(const struct drm_display_mode *mode)
1653{
1654 if (mode->type & ~DRM_MODE_TYPE_ALL)
1655 return MODE_BAD;
1656
1657 if (mode->flags & ~DRM_MODE_FLAG_ALL)
1658 return MODE_BAD;
1659
1660 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
1661 return MODE_BAD;
1662
1663 if (mode->clock == 0)
1664 return MODE_CLOCK_LOW;
1665
1666 if (mode->hdisplay == 0 ||
1667 mode->hsync_start < mode->hdisplay ||
1668 mode->hsync_end < mode->hsync_start ||
1669 mode->htotal < mode->hsync_end)
1670 return MODE_H_ILLEGAL;
1671
1672 if (mode->vdisplay == 0 ||
1673 mode->vsync_start < mode->vdisplay ||
1674 mode->vsync_end < mode->vsync_start ||
1675 mode->vtotal < mode->vsync_end)
1676 return MODE_V_ILLEGAL;
1677
1678 return MODE_OK;
1679}
1680
1681/**
1682 * drm_mode_validate_driver - make sure the mode is somewhat sane
1683 * @dev: drm device
1684 * @mode: mode to check
1685 *
1686 * First do basic validation on the mode, and then allow the driver
1687 * to check for device/driver specific limitations via the optional
1688 * &drm_mode_config_helper_funcs.mode_valid hook.
1689 *
1690 * Returns:
1691 * The mode status
1692 */
1693enum drm_mode_status
1694drm_mode_validate_driver(struct drm_device *dev,
1695 const struct drm_display_mode *mode)
1696{
1697 enum drm_mode_status status;
1698
1699 status = drm_mode_validate_basic(mode);
1700 if (status != MODE_OK)
1701 return status;
1702
1703 if (dev->mode_config.funcs->mode_valid)
1704 return dev->mode_config.funcs->mode_valid(dev, mode);
1705 else
1706 return MODE_OK;
1707}
1708EXPORT_SYMBOL(drm_mode_validate_driver);
1709
1710/**
1711 * drm_mode_validate_size - make sure modes adhere to size constraints
1712 * @mode: mode to check
1713 * @maxX: maximum width
1714 * @maxY: maximum height
1715 *
1716 * This function is a helper which can be used to validate modes against size
1717 * limitations of the DRM device/connector. If a mode is too big its status
1718 * member is updated with the appropriate validation failure code. The list
1719 * itself is not changed.
1720 *
1721 * Returns:
1722 * The mode status
1723 */
1724enum drm_mode_status
1725drm_mode_validate_size(const struct drm_display_mode *mode,
1726 int maxX, int maxY)
1727{
1728 if (maxX > 0 && mode->hdisplay > maxX)
1729 return MODE_VIRTUAL_X;
1730
1731 if (maxY > 0 && mode->vdisplay > maxY)
1732 return MODE_VIRTUAL_Y;
1733
1734 return MODE_OK;
1735}
1736EXPORT_SYMBOL(drm_mode_validate_size);
1737
1738/**
1739 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed
1740 * @mode: mode to check
1741 * @connector: drm connector under action
1742 *
1743 * This function is a helper which can be used to filter out any YCBCR420
1744 * only mode, when the source doesn't support it.
1745 *
1746 * Returns:
1747 * The mode status
1748 */
1749enum drm_mode_status
1750drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
1751 struct drm_connector *connector)
1752{
1753 if (!connector->ycbcr_420_allowed &&
1754 drm_mode_is_420_only(&connector->display_info, mode))
1755 return MODE_NO_420;
1756
1757 return MODE_OK;
1758}
1759EXPORT_SYMBOL(drm_mode_validate_ycbcr420);
1760
1761#define MODE_STATUS(status) [MODE_ ## status + 3] = #status
1762
1763static const char * const drm_mode_status_names[] = {
1764 MODE_STATUS(OK),
1765 MODE_STATUS(HSYNC),
1766 MODE_STATUS(VSYNC),
1767 MODE_STATUS(H_ILLEGAL),
1768 MODE_STATUS(V_ILLEGAL),
1769 MODE_STATUS(BAD_WIDTH),
1770 MODE_STATUS(NOMODE),
1771 MODE_STATUS(NO_INTERLACE),
1772 MODE_STATUS(NO_DBLESCAN),
1773 MODE_STATUS(NO_VSCAN),
1774 MODE_STATUS(MEM),
1775 MODE_STATUS(VIRTUAL_X),
1776 MODE_STATUS(VIRTUAL_Y),
1777 MODE_STATUS(MEM_VIRT),
1778 MODE_STATUS(NOCLOCK),
1779 MODE_STATUS(CLOCK_HIGH),
1780 MODE_STATUS(CLOCK_LOW),
1781 MODE_STATUS(CLOCK_RANGE),
1782 MODE_STATUS(BAD_HVALUE),
1783 MODE_STATUS(BAD_VVALUE),
1784 MODE_STATUS(BAD_VSCAN),
1785 MODE_STATUS(HSYNC_NARROW),
1786 MODE_STATUS(HSYNC_WIDE),
1787 MODE_STATUS(HBLANK_NARROW),
1788 MODE_STATUS(HBLANK_WIDE),
1789 MODE_STATUS(VSYNC_NARROW),
1790 MODE_STATUS(VSYNC_WIDE),
1791 MODE_STATUS(VBLANK_NARROW),
1792 MODE_STATUS(VBLANK_WIDE),
1793 MODE_STATUS(PANEL),
1794 MODE_STATUS(INTERLACE_WIDTH),
1795 MODE_STATUS(ONE_WIDTH),
1796 MODE_STATUS(ONE_HEIGHT),
1797 MODE_STATUS(ONE_SIZE),
1798 MODE_STATUS(NO_REDUCED),
1799 MODE_STATUS(NO_STEREO),
1800 MODE_STATUS(NO_420),
1801 MODE_STATUS(STALE),
1802 MODE_STATUS(BAD),
1803 MODE_STATUS(ERROR),
1804};
1805
1806#undef MODE_STATUS
1807
1808const char *drm_get_mode_status_name(enum drm_mode_status status)
1809{
1810 int index = status + 3;
1811
1812 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names)))
1813 return "";
1814
1815 return drm_mode_status_names[index];
1816}
1817
1818/**
1819 * drm_mode_prune_invalid - remove invalid modes from mode list
1820 * @dev: DRM device
1821 * @mode_list: list of modes to check
1822 * @verbose: be verbose about it
1823 *
1824 * This helper function can be used to prune a display mode list after
1825 * validation has been completed. All modes whose status is not MODE_OK will be
1826 * removed from the list, and if @verbose the status code and mode name is also
1827 * printed to dmesg.
1828 */
1829void drm_mode_prune_invalid(struct drm_device *dev,
1830 struct list_head *mode_list, bool verbose)
1831{
1832 struct drm_display_mode *mode, *t;
1833
1834 list_for_each_entry_safe(mode, t, mode_list, head) {
1835 if (mode->status != MODE_OK) {
1836 list_del(&mode->head);
1837 if (mode->type & DRM_MODE_TYPE_USERDEF) {
1838 drm_warn(dev, "User-defined mode not supported: "
1839 DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
1840 }
1841 if (verbose) {
1842 drm_dbg_kms(dev, "Rejected mode: " DRM_MODE_FMT " (%s)\n",
1843 DRM_MODE_ARG(mode), drm_get_mode_status_name(mode->status));
1844 }
1845 drm_mode_destroy(dev, mode);
1846 }
1847 }
1848}
1849EXPORT_SYMBOL(drm_mode_prune_invalid);
1850
1851/**
1852 * drm_mode_compare - compare modes for favorability
1853 * @priv: unused
1854 * @lh_a: list_head for first mode
1855 * @lh_b: list_head for second mode
1856 *
1857 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
1858 * which is better.
1859 *
1860 * Returns:
1861 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
1862 * positive if @lh_b is better than @lh_a.
1863 */
1864static int drm_mode_compare(void *priv, const struct list_head *lh_a,
1865 const struct list_head *lh_b)
1866{
1867 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
1868 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
1869 int diff;
1870
1871 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
1872 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
1873 if (diff)
1874 return diff;
1875 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
1876 if (diff)
1877 return diff;
1878
1879 diff = drm_mode_vrefresh(b) - drm_mode_vrefresh(a);
1880 if (diff)
1881 return diff;
1882
1883 diff = b->clock - a->clock;
1884 return diff;
1885}
1886
1887/**
1888 * drm_mode_sort - sort mode list
1889 * @mode_list: list of drm_display_mode structures to sort
1890 *
1891 * Sort @mode_list by favorability, moving good modes to the head of the list.
1892 */
1893void drm_mode_sort(struct list_head *mode_list)
1894{
1895 list_sort(NULL, mode_list, drm_mode_compare);
1896}
1897EXPORT_SYMBOL(drm_mode_sort);
1898
1899/**
1900 * drm_connector_list_update - update the mode list for the connector
1901 * @connector: the connector to update
1902 *
1903 * This moves the modes from the @connector probed_modes list
1904 * to the actual mode list. It compares the probed mode against the current
1905 * list and only adds different/new modes.
1906 *
1907 * This is just a helper functions doesn't validate any modes itself and also
1908 * doesn't prune any invalid modes. Callers need to do that themselves.
1909 */
1910void drm_connector_list_update(struct drm_connector *connector)
1911{
1912 struct drm_display_mode *pmode, *pt;
1913
1914 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
1915
1916 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) {
1917 struct drm_display_mode *mode;
1918 bool found_it = false;
1919
1920 /* go through current modes checking for the new probed mode */
1921 list_for_each_entry(mode, &connector->modes, head) {
1922 if (!drm_mode_equal(pmode, mode))
1923 continue;
1924
1925 found_it = true;
1926
1927 /*
1928 * If the old matching mode is stale (ie. left over
1929 * from a previous probe) just replace it outright.
1930 * Otherwise just merge the type bits between all
1931 * equal probed modes.
1932 *
1933 * If two probed modes are considered equal, pick the
1934 * actual timings from the one that's marked as
1935 * preferred (in case the match isn't 100%). If
1936 * multiple or zero preferred modes are present, favor
1937 * the mode added to the probed_modes list first.
1938 */
1939 if (mode->status == MODE_STALE) {
1940 drm_mode_copy(mode, pmode);
1941 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 &&
1942 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) {
1943 pmode->type |= mode->type;
1944 drm_mode_copy(mode, pmode);
1945 } else {
1946 mode->type |= pmode->type;
1947 }
1948
1949 list_del(&pmode->head);
1950 drm_mode_destroy(connector->dev, pmode);
1951 break;
1952 }
1953
1954 if (!found_it) {
1955 list_move_tail(&pmode->head, &connector->modes);
1956 }
1957 }
1958}
1959EXPORT_SYMBOL(drm_connector_list_update);
1960
1961static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr,
1962 struct drm_cmdline_mode *mode)
1963{
1964 unsigned int bpp;
1965
1966 if (str[0] != '-')
1967 return -EINVAL;
1968
1969 str++;
1970 bpp = simple_strtol(str, end_ptr, 10);
1971 if (*end_ptr == str)
1972 return -EINVAL;
1973
1974 mode->bpp = bpp;
1975 mode->bpp_specified = true;
1976
1977 return 0;
1978}
1979
1980static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr,
1981 struct drm_cmdline_mode *mode)
1982{
1983 unsigned int refresh;
1984
1985 if (str[0] != '@')
1986 return -EINVAL;
1987
1988 str++;
1989 refresh = simple_strtol(str, end_ptr, 10);
1990 if (*end_ptr == str)
1991 return -EINVAL;
1992
1993 mode->refresh = refresh;
1994 mode->refresh_specified = true;
1995
1996 return 0;
1997}
1998
1999static int drm_mode_parse_cmdline_extra(const char *str, int length,
2000 bool freestanding,
2001 const struct drm_connector *connector,
2002 struct drm_cmdline_mode *mode)
2003{
2004 int i;
2005
2006 for (i = 0; i < length; i++) {
2007 switch (str[i]) {
2008 case 'i':
2009 if (freestanding)
2010 return -EINVAL;
2011
2012 mode->interlace = true;
2013 break;
2014 case 'm':
2015 if (freestanding)
2016 return -EINVAL;
2017
2018 mode->margins = true;
2019 break;
2020 case 'D':
2021 if (mode->force != DRM_FORCE_UNSPECIFIED)
2022 return -EINVAL;
2023
2024 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
2025 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
2026 mode->force = DRM_FORCE_ON;
2027 else
2028 mode->force = DRM_FORCE_ON_DIGITAL;
2029 break;
2030 case 'd':
2031 if (mode->force != DRM_FORCE_UNSPECIFIED)
2032 return -EINVAL;
2033
2034 mode->force = DRM_FORCE_OFF;
2035 break;
2036 case 'e':
2037 if (mode->force != DRM_FORCE_UNSPECIFIED)
2038 return -EINVAL;
2039
2040 mode->force = DRM_FORCE_ON;
2041 break;
2042 default:
2043 return -EINVAL;
2044 }
2045 }
2046
2047 return 0;
2048}
2049
2050static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length,
2051 bool extras,
2052 const struct drm_connector *connector,
2053 struct drm_cmdline_mode *mode)
2054{
2055 const char *str_start = str;
2056 bool rb = false, cvt = false;
2057 int xres = 0, yres = 0;
2058 int remaining, i;
2059 char *end_ptr;
2060
2061 xres = simple_strtol(str, &end_ptr, 10);
2062 if (end_ptr == str)
2063 return -EINVAL;
2064
2065 if (end_ptr[0] != 'x')
2066 return -EINVAL;
2067 end_ptr++;
2068
2069 str = end_ptr;
2070 yres = simple_strtol(str, &end_ptr, 10);
2071 if (end_ptr == str)
2072 return -EINVAL;
2073
2074 remaining = length - (end_ptr - str_start);
2075 if (remaining < 0)
2076 return -EINVAL;
2077
2078 for (i = 0; i < remaining; i++) {
2079 switch (end_ptr[i]) {
2080 case 'M':
2081 cvt = true;
2082 break;
2083 case 'R':
2084 rb = true;
2085 break;
2086 default:
2087 /*
2088 * Try to pass that to our extras parsing
2089 * function to handle the case where the
2090 * extras are directly after the resolution
2091 */
2092 if (extras) {
2093 int ret = drm_mode_parse_cmdline_extra(end_ptr + i,
2094 1,
2095 false,
2096 connector,
2097 mode);
2098 if (ret)
2099 return ret;
2100 } else {
2101 return -EINVAL;
2102 }
2103 }
2104 }
2105
2106 mode->xres = xres;
2107 mode->yres = yres;
2108 mode->cvt = cvt;
2109 mode->rb = rb;
2110
2111 return 0;
2112}
2113
2114static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret)
2115{
2116 const char *value;
2117 char *endp;
2118
2119 /*
2120 * delim must point to the '=', otherwise it is a syntax error and
2121 * if delim points to the terminating zero, then delim + 1 will point
2122 * past the end of the string.
2123 */
2124 if (*delim != '=')
2125 return -EINVAL;
2126
2127 value = delim + 1;
2128 *int_ret = simple_strtol(value, &endp, 10);
2129
2130 /* Make sure we have parsed something */
2131 if (endp == value)
2132 return -EINVAL;
2133
2134 return 0;
2135}
2136
2137static int drm_mode_parse_panel_orientation(const char *delim,
2138 struct drm_cmdline_mode *mode)
2139{
2140 const char *value;
2141
2142 if (*delim != '=')
2143 return -EINVAL;
2144
2145 value = delim + 1;
2146 delim = strchr(value, ',');
2147 if (!delim)
2148 delim = value + strlen(value);
2149
2150 if (!strncmp(value, "normal", delim - value))
2151 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL;
2152 else if (!strncmp(value, "upside_down", delim - value))
2153 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
2154 else if (!strncmp(value, "left_side_up", delim - value))
2155 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
2156 else if (!strncmp(value, "right_side_up", delim - value))
2157 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
2158 else
2159 return -EINVAL;
2160
2161 return 0;
2162}
2163
2164static int drm_mode_parse_tv_mode(const char *delim,
2165 struct drm_cmdline_mode *mode)
2166{
2167 const char *value;
2168 int ret;
2169
2170 if (*delim != '=')
2171 return -EINVAL;
2172
2173 value = delim + 1;
2174 delim = strchr(value, ',');
2175 if (!delim)
2176 delim = value + strlen(value);
2177
2178 ret = drm_get_tv_mode_from_name(value, delim - value);
2179 if (ret < 0)
2180 return ret;
2181
2182 mode->tv_mode_specified = true;
2183 mode->tv_mode = ret;
2184
2185 return 0;
2186}
2187
2188static int drm_mode_parse_cmdline_options(const char *str,
2189 bool freestanding,
2190 const struct drm_connector *connector,
2191 struct drm_cmdline_mode *mode)
2192{
2193 unsigned int deg, margin, rotation = 0;
2194 const char *delim, *option, *sep;
2195
2196 option = str;
2197 do {
2198 delim = strchr(option, '=');
2199 if (!delim) {
2200 delim = strchr(option, ',');
2201
2202 if (!delim)
2203 delim = option + strlen(option);
2204 }
2205
2206 if (!strncmp(option, "rotate", delim - option)) {
2207 if (drm_mode_parse_cmdline_int(delim, &deg))
2208 return -EINVAL;
2209
2210 switch (deg) {
2211 case 0:
2212 rotation |= DRM_MODE_ROTATE_0;
2213 break;
2214
2215 case 90:
2216 rotation |= DRM_MODE_ROTATE_90;
2217 break;
2218
2219 case 180:
2220 rotation |= DRM_MODE_ROTATE_180;
2221 break;
2222
2223 case 270:
2224 rotation |= DRM_MODE_ROTATE_270;
2225 break;
2226
2227 default:
2228 return -EINVAL;
2229 }
2230 } else if (!strncmp(option, "reflect_x", delim - option)) {
2231 rotation |= DRM_MODE_REFLECT_X;
2232 } else if (!strncmp(option, "reflect_y", delim - option)) {
2233 rotation |= DRM_MODE_REFLECT_Y;
2234 } else if (!strncmp(option, "margin_right", delim - option)) {
2235 if (drm_mode_parse_cmdline_int(delim, &margin))
2236 return -EINVAL;
2237
2238 mode->tv_margins.right = margin;
2239 } else if (!strncmp(option, "margin_left", delim - option)) {
2240 if (drm_mode_parse_cmdline_int(delim, &margin))
2241 return -EINVAL;
2242
2243 mode->tv_margins.left = margin;
2244 } else if (!strncmp(option, "margin_top", delim - option)) {
2245 if (drm_mode_parse_cmdline_int(delim, &margin))
2246 return -EINVAL;
2247
2248 mode->tv_margins.top = margin;
2249 } else if (!strncmp(option, "margin_bottom", delim - option)) {
2250 if (drm_mode_parse_cmdline_int(delim, &margin))
2251 return -EINVAL;
2252
2253 mode->tv_margins.bottom = margin;
2254 } else if (!strncmp(option, "panel_orientation", delim - option)) {
2255 if (drm_mode_parse_panel_orientation(delim, mode))
2256 return -EINVAL;
2257 } else if (!strncmp(option, "tv_mode", delim - option)) {
2258 if (drm_mode_parse_tv_mode(delim, mode))
2259 return -EINVAL;
2260 } else {
2261 return -EINVAL;
2262 }
2263 sep = strchr(delim, ',');
2264 option = sep + 1;
2265 } while (sep);
2266
2267 if (rotation && freestanding)
2268 return -EINVAL;
2269
2270 if (!(rotation & DRM_MODE_ROTATE_MASK))
2271 rotation |= DRM_MODE_ROTATE_0;
2272
2273 /* Make sure there is exactly one rotation defined */
2274 if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK))
2275 return -EINVAL;
2276
2277 mode->rotation_reflection = rotation;
2278
2279 return 0;
2280}
2281
2282struct drm_named_mode {
2283 const char *name;
2284 unsigned int pixel_clock_khz;
2285 unsigned int xres;
2286 unsigned int yres;
2287 unsigned int flags;
2288 unsigned int tv_mode;
2289};
2290
2291#define NAMED_MODE(_name, _pclk, _x, _y, _flags, _mode) \
2292 { \
2293 .name = _name, \
2294 .pixel_clock_khz = _pclk, \
2295 .xres = _x, \
2296 .yres = _y, \
2297 .flags = _flags, \
2298 .tv_mode = _mode, \
2299 }
2300
2301static const struct drm_named_mode drm_named_modes[] = {
2302 NAMED_MODE("NTSC", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_NTSC),
2303 NAMED_MODE("NTSC-J", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_NTSC_J),
2304 NAMED_MODE("PAL", 13500, 720, 576, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_PAL),
2305 NAMED_MODE("PAL-M", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_PAL_M),
2306};
2307
2308static int drm_mode_parse_cmdline_named_mode(const char *name,
2309 unsigned int name_end,
2310 struct drm_cmdline_mode *cmdline_mode)
2311{
2312 unsigned int i;
2313
2314 if (!name_end)
2315 return 0;
2316
2317 /* If the name starts with a digit, it's not a named mode */
2318 if (isdigit(name[0]))
2319 return 0;
2320
2321 /*
2322 * If there's an equal sign in the name, the command-line
2323 * contains only an option and no mode.
2324 */
2325 if (strnchr(name, name_end, '='))
2326 return 0;
2327
2328 /* The connection status extras can be set without a mode. */
2329 if (name_end == 1 &&
2330 (name[0] == 'd' || name[0] == 'D' || name[0] == 'e'))
2331 return 0;
2332
2333 /*
2334 * We're sure we're a named mode at this point, iterate over the
2335 * list of modes we're aware of.
2336 */
2337 for (i = 0; i < ARRAY_SIZE(drm_named_modes); i++) {
2338 const struct drm_named_mode *mode = &drm_named_modes[i];
2339 int ret;
2340
2341 ret = str_has_prefix(name, mode->name);
2342 if (ret != name_end)
2343 continue;
2344
2345 strscpy(cmdline_mode->name, mode->name, sizeof(cmdline_mode->name));
2346 cmdline_mode->pixel_clock = mode->pixel_clock_khz;
2347 cmdline_mode->xres = mode->xres;
2348 cmdline_mode->yres = mode->yres;
2349 cmdline_mode->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
2350 cmdline_mode->tv_mode = mode->tv_mode;
2351 cmdline_mode->tv_mode_specified = true;
2352 cmdline_mode->specified = true;
2353
2354 return 1;
2355 }
2356
2357 return -EINVAL;
2358}
2359
2360/**
2361 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector
2362 * @mode_option: optional per connector mode option
2363 * @connector: connector to parse modeline for
2364 * @mode: preallocated drm_cmdline_mode structure to fill out
2365 *
2366 * This parses @mode_option command line modeline for modes and options to
2367 * configure the connector.
2368 *
2369 * This uses the same parameters as the fb modedb.c, except for an extra
2370 * force-enable, force-enable-digital and force-disable bit at the end::
2371 *
2372 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
2373 *
2374 * Additionals options can be provided following the mode, using a comma to
2375 * separate each option. Valid options can be found in
2376 * Documentation/fb/modedb.rst.
2377 *
2378 * The intermediate drm_cmdline_mode structure is required to store additional
2379 * options from the command line modline like the force-enable/disable flag.
2380 *
2381 * Returns:
2382 * True if a valid modeline has been parsed, false otherwise.
2383 */
2384bool drm_mode_parse_command_line_for_connector(const char *mode_option,
2385 const struct drm_connector *connector,
2386 struct drm_cmdline_mode *mode)
2387{
2388 const char *name;
2389 bool freestanding = false, parse_extras = false;
2390 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0;
2391 unsigned int mode_end = 0;
2392 const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL;
2393 const char *options_ptr = NULL;
2394 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL;
2395 int len, ret;
2396
2397 memset(mode, 0, sizeof(*mode));
2398 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
2399
2400 if (!mode_option)
2401 return false;
2402
2403 name = mode_option;
2404
2405 /* Locate the start of named options */
2406 options_ptr = strchr(name, ',');
2407 if (options_ptr)
2408 options_off = options_ptr - name;
2409 else
2410 options_off = strlen(name);
2411
2412 /* Try to locate the bpp and refresh specifiers, if any */
2413 bpp_ptr = strnchr(name, options_off, '-');
2414 while (bpp_ptr && !isdigit(bpp_ptr[1]))
2415 bpp_ptr = strnchr(bpp_ptr + 1, options_off, '-');
2416 if (bpp_ptr)
2417 bpp_off = bpp_ptr - name;
2418
2419 refresh_ptr = strnchr(name, options_off, '@');
2420 if (refresh_ptr)
2421 refresh_off = refresh_ptr - name;
2422
2423 /* Locate the end of the name / resolution, and parse it */
2424 if (bpp_ptr) {
2425 mode_end = bpp_off;
2426 } else if (refresh_ptr) {
2427 mode_end = refresh_off;
2428 } else if (options_ptr) {
2429 mode_end = options_off;
2430 parse_extras = true;
2431 } else {
2432 mode_end = strlen(name);
2433 parse_extras = true;
2434 }
2435
2436 if (!mode_end)
2437 return false;
2438
2439 ret = drm_mode_parse_cmdline_named_mode(name, mode_end, mode);
2440 if (ret < 0)
2441 return false;
2442
2443 /*
2444 * Having a mode that starts by a letter (and thus is named) and
2445 * an at-sign (used to specify a refresh rate) is disallowed.
2446 */
2447 if (ret && refresh_ptr)
2448 return false;
2449
2450 /* No named mode? Check for a normal mode argument, e.g. 1024x768 */
2451 if (!mode->specified && isdigit(name[0])) {
2452 ret = drm_mode_parse_cmdline_res_mode(name, mode_end,
2453 parse_extras,
2454 connector,
2455 mode);
2456 if (ret)
2457 return false;
2458
2459 mode->specified = true;
2460 }
2461
2462 /* No mode? Check for freestanding extras and/or options */
2463 if (!mode->specified) {
2464 unsigned int len = strlen(mode_option);
2465
2466 if (bpp_ptr || refresh_ptr)
2467 return false; /* syntax error */
2468
2469 if (len == 1 || (len >= 2 && mode_option[1] == ','))
2470 extra_ptr = mode_option;
2471 else
2472 options_ptr = mode_option - 1;
2473
2474 freestanding = true;
2475 }
2476
2477 if (bpp_ptr) {
2478 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode);
2479 if (ret)
2480 return false;
2481
2482 mode->bpp_specified = true;
2483 }
2484
2485 if (refresh_ptr) {
2486 ret = drm_mode_parse_cmdline_refresh(refresh_ptr,
2487 &refresh_end_ptr, mode);
2488 if (ret)
2489 return false;
2490
2491 mode->refresh_specified = true;
2492 }
2493
2494 /*
2495 * Locate the end of the bpp / refresh, and parse the extras
2496 * if relevant
2497 */
2498 if (bpp_ptr && refresh_ptr)
2499 extra_ptr = max(bpp_end_ptr, refresh_end_ptr);
2500 else if (bpp_ptr)
2501 extra_ptr = bpp_end_ptr;
2502 else if (refresh_ptr)
2503 extra_ptr = refresh_end_ptr;
2504
2505 if (extra_ptr) {
2506 if (options_ptr)
2507 len = options_ptr - extra_ptr;
2508 else
2509 len = strlen(extra_ptr);
2510
2511 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding,
2512 connector, mode);
2513 if (ret)
2514 return false;
2515 }
2516
2517 if (options_ptr) {
2518 ret = drm_mode_parse_cmdline_options(options_ptr + 1,
2519 freestanding,
2520 connector, mode);
2521 if (ret)
2522 return false;
2523 }
2524
2525 return true;
2526}
2527EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
2528
2529static struct drm_display_mode *drm_named_mode(struct drm_device *dev,
2530 struct drm_cmdline_mode *cmd)
2531{
2532 unsigned int i;
2533
2534 for (i = 0; i < ARRAY_SIZE(drm_named_modes); i++) {
2535 const struct drm_named_mode *named_mode = &drm_named_modes[i];
2536
2537 if (strcmp(cmd->name, named_mode->name))
2538 continue;
2539
2540 if (!cmd->tv_mode_specified)
2541 continue;
2542
2543 return drm_analog_tv_mode(dev,
2544 named_mode->tv_mode,
2545 named_mode->pixel_clock_khz * 1000,
2546 named_mode->xres,
2547 named_mode->yres,
2548 named_mode->flags & DRM_MODE_FLAG_INTERLACE);
2549 }
2550
2551 return NULL;
2552}
2553
2554/**
2555 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
2556 * @dev: DRM device to create the new mode for
2557 * @cmd: input command line modeline
2558 *
2559 * Returns:
2560 * Pointer to converted mode on success, NULL on error.
2561 */
2562struct drm_display_mode *
2563drm_mode_create_from_cmdline_mode(struct drm_device *dev,
2564 struct drm_cmdline_mode *cmd)
2565{
2566 struct drm_display_mode *mode;
2567
2568 if (cmd->xres == 0 || cmd->yres == 0)
2569 return NULL;
2570
2571 if (strlen(cmd->name))
2572 mode = drm_named_mode(dev, cmd);
2573 else if (cmd->cvt)
2574 mode = drm_cvt_mode(dev,
2575 cmd->xres, cmd->yres,
2576 cmd->refresh_specified ? cmd->refresh : 60,
2577 cmd->rb, cmd->interlace,
2578 cmd->margins);
2579 else
2580 mode = drm_gtf_mode(dev,
2581 cmd->xres, cmd->yres,
2582 cmd->refresh_specified ? cmd->refresh : 60,
2583 cmd->interlace,
2584 cmd->margins);
2585 if (!mode)
2586 return NULL;
2587
2588 mode->type |= DRM_MODE_TYPE_USERDEF;
2589 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */
2590 if (cmd->xres == 1366)
2591 drm_mode_fixup_1366x768(mode);
2592 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
2593 return mode;
2594}
2595EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);
2596
2597/**
2598 * drm_mode_convert_to_umode - convert a drm_display_mode into a modeinfo
2599 * @out: drm_mode_modeinfo struct to return to the user
2600 * @in: drm_display_mode to use
2601 *
2602 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
2603 * the user.
2604 */
2605void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
2606 const struct drm_display_mode *in)
2607{
2608 out->clock = in->clock;
2609 out->hdisplay = in->hdisplay;
2610 out->hsync_start = in->hsync_start;
2611 out->hsync_end = in->hsync_end;
2612 out->htotal = in->htotal;
2613 out->hskew = in->hskew;
2614 out->vdisplay = in->vdisplay;
2615 out->vsync_start = in->vsync_start;
2616 out->vsync_end = in->vsync_end;
2617 out->vtotal = in->vtotal;
2618 out->vscan = in->vscan;
2619 out->vrefresh = drm_mode_vrefresh(in);
2620 out->flags = in->flags;
2621 out->type = in->type;
2622
2623 switch (in->picture_aspect_ratio) {
2624 case HDMI_PICTURE_ASPECT_4_3:
2625 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3;
2626 break;
2627 case HDMI_PICTURE_ASPECT_16_9:
2628 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9;
2629 break;
2630 case HDMI_PICTURE_ASPECT_64_27:
2631 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27;
2632 break;
2633 case HDMI_PICTURE_ASPECT_256_135:
2634 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135;
2635 break;
2636 default:
2637 WARN(1, "Invalid aspect ratio (0%x) on mode\n",
2638 in->picture_aspect_ratio);
2639 fallthrough;
2640 case HDMI_PICTURE_ASPECT_NONE:
2641 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE;
2642 break;
2643 }
2644
2645 strscpy_pad(out->name, in->name, sizeof(out->name));
2646}
2647
2648/**
2649 * drm_mode_convert_umode - convert a modeinfo into a drm_display_mode
2650 * @dev: drm device
2651 * @out: drm_display_mode to return to the user
2652 * @in: drm_mode_modeinfo to use
2653 *
2654 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
2655 * the caller.
2656 *
2657 * Returns:
2658 * Zero on success, negative errno on failure.
2659 */
2660int drm_mode_convert_umode(struct drm_device *dev,
2661 struct drm_display_mode *out,
2662 const struct drm_mode_modeinfo *in)
2663{
2664 if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
2665 return -ERANGE;
2666
2667 out->clock = in->clock;
2668 out->hdisplay = in->hdisplay;
2669 out->hsync_start = in->hsync_start;
2670 out->hsync_end = in->hsync_end;
2671 out->htotal = in->htotal;
2672 out->hskew = in->hskew;
2673 out->vdisplay = in->vdisplay;
2674 out->vsync_start = in->vsync_start;
2675 out->vsync_end = in->vsync_end;
2676 out->vtotal = in->vtotal;
2677 out->vscan = in->vscan;
2678 out->flags = in->flags;
2679 /*
2680 * Old xf86-video-vmware (possibly others too) used to
2681 * leave 'type' uninitialized. Just ignore any bits we
2682 * don't like. It's a just hint after all, and more
2683 * useful for the kernel->userspace direction anyway.
2684 */
2685 out->type = in->type & DRM_MODE_TYPE_ALL;
2686 strscpy_pad(out->name, in->name, sizeof(out->name));
2687
2688 /* Clearing picture aspect ratio bits from out flags,
2689 * as the aspect-ratio information is not stored in
2690 * flags for kernel-mode, but in picture_aspect_ratio.
2691 */
2692 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
2693
2694 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) {
2695 case DRM_MODE_FLAG_PIC_AR_4_3:
2696 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3;
2697 break;
2698 case DRM_MODE_FLAG_PIC_AR_16_9:
2699 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9;
2700 break;
2701 case DRM_MODE_FLAG_PIC_AR_64_27:
2702 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27;
2703 break;
2704 case DRM_MODE_FLAG_PIC_AR_256_135:
2705 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135;
2706 break;
2707 case DRM_MODE_FLAG_PIC_AR_NONE:
2708 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
2709 break;
2710 default:
2711 return -EINVAL;
2712 }
2713
2714 out->status = drm_mode_validate_driver(dev, out);
2715 if (out->status != MODE_OK)
2716 return -EINVAL;
2717
2718 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V);
2719
2720 return 0;
2721}
2722
2723/**
2724 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420
2725 * output format
2726 *
2727 * @display: display under action
2728 * @mode: video mode to be tested.
2729 *
2730 * Returns:
2731 * true if the mode can be supported in YCBCR420 format
2732 * false if not.
2733 */
2734bool drm_mode_is_420_only(const struct drm_display_info *display,
2735 const struct drm_display_mode *mode)
2736{
2737 u8 vic = drm_match_cea_mode(mode);
2738
2739 return test_bit(vic, display->hdmi.y420_vdb_modes);
2740}
2741EXPORT_SYMBOL(drm_mode_is_420_only);
2742
2743/**
2744 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420
2745 * output format also (along with RGB/YCBCR444/422)
2746 *
2747 * @display: display under action.
2748 * @mode: video mode to be tested.
2749 *
2750 * Returns:
2751 * true if the mode can be support YCBCR420 format
2752 * false if not.
2753 */
2754bool drm_mode_is_420_also(const struct drm_display_info *display,
2755 const struct drm_display_mode *mode)
2756{
2757 u8 vic = drm_match_cea_mode(mode);
2758
2759 return test_bit(vic, display->hdmi.y420_cmdb_modes);
2760}
2761EXPORT_SYMBOL(drm_mode_is_420_also);
2762/**
2763 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420
2764 * output format
2765 *
2766 * @display: display under action.
2767 * @mode: video mode to be tested.
2768 *
2769 * Returns:
2770 * true if the mode can be supported in YCBCR420 format
2771 * false if not.
2772 */
2773bool drm_mode_is_420(const struct drm_display_info *display,
2774 const struct drm_display_mode *mode)
2775{
2776 return drm_mode_is_420_only(display, mode) ||
2777 drm_mode_is_420_also(display, mode);
2778}
2779EXPORT_SYMBOL(drm_mode_is_420);
2780
2781/**
2782 * drm_set_preferred_mode - Sets the preferred mode of a connector
2783 * @connector: connector whose mode list should be processed
2784 * @hpref: horizontal resolution of preferred mode
2785 * @vpref: vertical resolution of preferred mode
2786 *
2787 * Marks a mode as preferred if it matches the resolution specified by @hpref
2788 * and @vpref.
2789 */
2790void drm_set_preferred_mode(struct drm_connector *connector,
2791 int hpref, int vpref)
2792{
2793 struct drm_display_mode *mode;
2794
2795 list_for_each_entry(mode, &connector->probed_modes, head) {
2796 if (mode->hdisplay == hpref &&
2797 mode->vdisplay == vpref)
2798 mode->type |= DRM_MODE_TYPE_PREFERRED;
2799 }
2800}
2801EXPORT_SYMBOL(drm_set_preferred_mode);