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