blob: ff447f175a565882e8cdfc0c687f719f46731221 [file] [log] [blame]
Dave Airlief453ba02008-11-07 14:05:41 -08001/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 *
5 * DRM core CRTC related functions
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that copyright
10 * notice and this permission notice appear in supporting documentation, and
11 * that the name of the copyright holders not be used in advertising or
12 * publicity pertaining to distribution of the software without specific,
13 * written prior permission. The copyright holders make no representations
14 * about the suitability of this software for any purpose. It is provided "as
15 * is" without express or implied warranty.
16 *
17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
23 * OF THIS SOFTWARE.
24 *
25 * Authors:
26 * Keith Packard
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
30 */
31
32#include "drmP.h"
33#include "drm_crtc.h"
34#include "drm_crtc_helper.h"
35
yakui_zhao67149772009-04-02 11:52:12 +080036static void drm_mode_validate_flag(struct drm_connector *connector,
37 int flags)
38{
39 struct drm_display_mode *mode, *t;
40
41 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
42 return;
43
44 list_for_each_entry_safe(mode, t, &connector->modes, head) {
45 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
46 !(flags & DRM_MODE_FLAG_INTERLACE))
47 mode->status = MODE_NO_INTERLACE;
48 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
49 !(flags & DRM_MODE_FLAG_DBLSCAN))
50 mode->status = MODE_NO_DBLESCAN;
51 }
52
53 return;
54}
55
Dave Airlief453ba02008-11-07 14:05:41 -080056/**
57 * drm_helper_probe_connector_modes - get complete set of display modes
58 * @dev: DRM device
59 * @maxX: max width for modes
60 * @maxY: max height for modes
61 *
62 * LOCKING:
63 * Caller must hold mode config lock.
64 *
65 * Based on @dev's mode_config layout, scan all the connectors and try to detect
66 * modes on them. Modes will first be added to the connector's probed_modes
67 * list, then culled (based on validity and the @maxX, @maxY parameters) and
68 * put into the normal modes list.
69 *
70 * Intended to be used either at bootup time or when major configuration
71 * changes have occurred.
72 *
73 * FIXME: take into account monitor limits
Jesse Barnes40a518d2009-01-12 12:05:32 -080074 *
75 * RETURNS:
76 * Number of modes found on @connector.
Dave Airlief453ba02008-11-07 14:05:41 -080077 */
Jesse Barnes40a518d2009-01-12 12:05:32 -080078int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
79 uint32_t maxX, uint32_t maxY)
Dave Airlief453ba02008-11-07 14:05:41 -080080{
81 struct drm_device *dev = connector->dev;
82 struct drm_display_mode *mode, *t;
83 struct drm_connector_helper_funcs *connector_funcs =
84 connector->helper_private;
Jesse Barnes40a518d2009-01-12 12:05:32 -080085 int count = 0;
yakui_zhao67149772009-04-02 11:52:12 +080086 int mode_flags = 0;
Dave Airlief453ba02008-11-07 14:05:41 -080087
Zhao Yakui58367ed2009-07-20 13:48:07 +080088 DRM_DEBUG_KMS("%s\n", drm_get_connector_name(connector));
Dave Airlief453ba02008-11-07 14:05:41 -080089 /* set all modes to the unverified state */
90 list_for_each_entry_safe(mode, t, &connector->modes, head)
91 mode->status = MODE_UNVERIFIED;
92
93 connector->status = connector->funcs->detect(connector);
94
95 if (connector->status == connector_status_disconnected) {
Zhao Yakui58367ed2009-07-20 13:48:07 +080096 DRM_DEBUG_KMS("%s is disconnected\n",
Dave Airlief453ba02008-11-07 14:05:41 -080097 drm_get_connector_name(connector));
Adam Jackson620f3782009-09-08 11:51:46 +100098 goto prune;
Dave Airlief453ba02008-11-07 14:05:41 -080099 }
100
Jesse Barnes40a518d2009-01-12 12:05:32 -0800101 count = (*connector_funcs->get_modes)(connector);
ykzhao50fe4cf2009-09-03 14:30:04 +0800102 if (!count) {
103 count = drm_add_modes_noedid(connector, 800, 600);
104 if (!count)
105 return 0;
106 }
Dave Airlief453ba02008-11-07 14:05:41 -0800107
Jesse Barnes40a518d2009-01-12 12:05:32 -0800108 drm_mode_connector_list_update(connector);
Dave Airlief453ba02008-11-07 14:05:41 -0800109
110 if (maxX && maxY)
111 drm_mode_validate_size(dev, &connector->modes, maxX,
112 maxY, 0);
yakui_zhao67149772009-04-02 11:52:12 +0800113
114 if (connector->interlace_allowed)
115 mode_flags |= DRM_MODE_FLAG_INTERLACE;
116 if (connector->doublescan_allowed)
117 mode_flags |= DRM_MODE_FLAG_DBLSCAN;
118 drm_mode_validate_flag(connector, mode_flags);
119
Dave Airlief453ba02008-11-07 14:05:41 -0800120 list_for_each_entry_safe(mode, t, &connector->modes, head) {
121 if (mode->status == MODE_OK)
122 mode->status = connector_funcs->mode_valid(connector,
123 mode);
124 }
125
Adam Jackson620f3782009-09-08 11:51:46 +1000126prune:
Dave Airlief453ba02008-11-07 14:05:41 -0800127 drm_mode_prune_invalid(dev, &connector->modes, true);
128
Jesse Barnes40a518d2009-01-12 12:05:32 -0800129 if (list_empty(&connector->modes))
130 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800131
132 drm_mode_sort(&connector->modes);
133
Zhao Yakui58367ed2009-07-20 13:48:07 +0800134 DRM_DEBUG_KMS("Probed modes for %s\n",
135 drm_get_connector_name(connector));
Dave Airlief453ba02008-11-07 14:05:41 -0800136 list_for_each_entry_safe(mode, t, &connector->modes, head) {
137 mode->vrefresh = drm_mode_vrefresh(mode);
138
139 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
140 drm_mode_debug_printmodeline(mode);
141 }
Jesse Barnes40a518d2009-01-12 12:05:32 -0800142
143 return count;
Dave Airlief453ba02008-11-07 14:05:41 -0800144}
145EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
146
Jesse Barnes40a518d2009-01-12 12:05:32 -0800147int drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX,
Dave Airlief453ba02008-11-07 14:05:41 -0800148 uint32_t maxY)
149{
150 struct drm_connector *connector;
Jesse Barnes40a518d2009-01-12 12:05:32 -0800151 int count = 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800152
153 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Jesse Barnes40a518d2009-01-12 12:05:32 -0800154 count += drm_helper_probe_single_connector_modes(connector,
155 maxX, maxY);
Dave Airlief453ba02008-11-07 14:05:41 -0800156 }
Jesse Barnes40a518d2009-01-12 12:05:32 -0800157
158 return count;
Dave Airlief453ba02008-11-07 14:05:41 -0800159}
160EXPORT_SYMBOL(drm_helper_probe_connector_modes);
161
Dave Airlief453ba02008-11-07 14:05:41 -0800162/**
Keith Packardc9fb15f2009-05-30 20:42:28 -0700163 * drm_helper_encoder_in_use - check if a given encoder is in use
164 * @encoder: encoder to check
165 *
166 * LOCKING:
167 * Caller must hold mode config lock.
168 *
169 * Walk @encoders's DRM device's mode_config and see if it's in use.
170 *
171 * RETURNS:
172 * True if @encoder is part of the mode_config, false otherwise.
173 */
174bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
175{
176 struct drm_connector *connector;
177 struct drm_device *dev = encoder->dev;
178 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
179 if (connector->encoder == encoder)
180 return true;
181 return false;
182}
183EXPORT_SYMBOL(drm_helper_encoder_in_use);
184
185/**
Dave Airlief453ba02008-11-07 14:05:41 -0800186 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
187 * @crtc: CRTC to check
188 *
189 * LOCKING:
190 * Caller must hold mode config lock.
191 *
192 * Walk @crtc's DRM device's mode_config and see if it's in use.
193 *
194 * RETURNS:
195 * True if @crtc is part of the mode_config, false otherwise.
196 */
197bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
198{
199 struct drm_encoder *encoder;
200 struct drm_device *dev = crtc->dev;
201 /* FIXME: Locking around list access? */
202 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700203 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
Dave Airlief453ba02008-11-07 14:05:41 -0800204 return true;
205 return false;
206}
207EXPORT_SYMBOL(drm_helper_crtc_in_use);
208
209/**
210 * drm_disable_unused_functions - disable unused objects
211 * @dev: DRM device
212 *
213 * LOCKING:
214 * Caller must hold mode config lock.
215 *
216 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
217 * by calling its dpms function, which should power it off.
218 */
219void drm_helper_disable_unused_functions(struct drm_device *dev)
220{
221 struct drm_encoder *encoder;
Dave Airliea3a05442009-08-31 15:16:30 +1000222 struct drm_connector *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800223 struct drm_encoder_helper_funcs *encoder_funcs;
224 struct drm_crtc *crtc;
225
Dave Airliea3a05442009-08-31 15:16:30 +1000226 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
227 if (!connector->encoder)
228 continue;
229 if (connector->status == connector_status_disconnected)
230 connector->encoder = NULL;
231 }
232
Dave Airlief453ba02008-11-07 14:05:41 -0800233 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
234 encoder_funcs = encoder->helper_private;
Dave Airliea3a05442009-08-31 15:16:30 +1000235 if (!drm_helper_encoder_in_use(encoder)) {
236 if (encoder_funcs->disable)
237 (*encoder_funcs->disable)(encoder);
238 else
239 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
Dave Airlie9c552dd2009-09-02 14:00:11 +1000240 /* disconnector encoder from any connector */
241 encoder->crtc = NULL;
Dave Airliea3a05442009-08-31 15:16:30 +1000242 }
Dave Airlief453ba02008-11-07 14:05:41 -0800243 }
244
245 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
246 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
247 crtc->enabled = drm_helper_crtc_in_use(crtc);
248 if (!crtc->enabled) {
249 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
250 crtc->fb = NULL;
251 }
252 }
253}
254EXPORT_SYMBOL(drm_helper_disable_unused_functions);
255
256static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height)
257{
258 struct drm_display_mode *mode;
259
260 list_for_each_entry(mode, &connector->modes, head) {
261 if (drm_mode_width(mode) > width ||
262 drm_mode_height(mode) > height)
263 continue;
264 if (mode->type & DRM_MODE_TYPE_PREFERRED)
265 return mode;
266 }
267 return NULL;
268}
269
270static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
271{
272 bool enable;
273
274 if (strict) {
275 enable = connector->status == connector_status_connected;
276 } else {
277 enable = connector->status != connector_status_disconnected;
278 }
279 return enable;
280}
281
282static void drm_enable_connectors(struct drm_device *dev, bool *enabled)
283{
284 bool any_enabled = false;
285 struct drm_connector *connector;
286 int i = 0;
287
288 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
289 enabled[i] = drm_connector_enabled(connector, true);
Zhao Yakui58367ed2009-07-20 13:48:07 +0800290 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
Jesse Barnes40a518d2009-01-12 12:05:32 -0800291 enabled[i] ? "yes" : "no");
Dave Airlief453ba02008-11-07 14:05:41 -0800292 any_enabled |= enabled[i];
293 i++;
294 }
295
296 if (any_enabled)
297 return;
298
299 i = 0;
300 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
301 enabled[i] = drm_connector_enabled(connector, false);
302 i++;
303 }
304}
305
306static bool drm_target_preferred(struct drm_device *dev,
307 struct drm_display_mode **modes,
308 bool *enabled, int width, int height)
309{
310 struct drm_connector *connector;
311 int i = 0;
312
313 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
314
315 if (enabled[i] == false) {
316 i++;
317 continue;
318 }
319
Zhao Yakui58367ed2009-07-20 13:48:07 +0800320 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
Jesse Barnes40a518d2009-01-12 12:05:32 -0800321 connector->base.id);
322
Dave Airlief453ba02008-11-07 14:05:41 -0800323 modes[i] = drm_has_preferred_mode(connector, width, height);
Jesse Barnes40a518d2009-01-12 12:05:32 -0800324 /* No preferred modes, pick one off the list */
325 if (!modes[i] && !list_empty(&connector->modes)) {
Dave Airlief453ba02008-11-07 14:05:41 -0800326 list_for_each_entry(modes[i], &connector->modes, head)
327 break;
328 }
Zhao Yakui58367ed2009-07-20 13:48:07 +0800329 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
Jesse Barnes40a518d2009-01-12 12:05:32 -0800330 "none");
Dave Airlief453ba02008-11-07 14:05:41 -0800331 i++;
332 }
333 return true;
334}
335
336static int drm_pick_crtcs(struct drm_device *dev,
337 struct drm_crtc **best_crtcs,
338 struct drm_display_mode **modes,
339 int n, int width, int height)
340{
341 int c, o;
342 struct drm_connector *connector;
343 struct drm_connector_helper_funcs *connector_funcs;
344 struct drm_encoder *encoder;
345 struct drm_crtc *best_crtc;
346 int my_score, best_score, score;
347 struct drm_crtc **crtcs, *crtc;
348
349 if (n == dev->mode_config.num_connector)
350 return 0;
351 c = 0;
352 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
353 if (c == n)
354 break;
355 c++;
356 }
357
358 best_crtcs[n] = NULL;
359 best_crtc = NULL;
360 best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height);
361 if (modes[n] == NULL)
362 return best_score;
363
364 crtcs = kmalloc(dev->mode_config.num_connector *
365 sizeof(struct drm_crtc *), GFP_KERNEL);
366 if (!crtcs)
367 return best_score;
368
369 my_score = 1;
370 if (connector->status == connector_status_connected)
371 my_score++;
372 if (drm_has_preferred_mode(connector, width, height))
373 my_score++;
374
375 connector_funcs = connector->helper_private;
376 encoder = connector_funcs->best_encoder(connector);
377 if (!encoder)
378 goto out;
379
380 connector->encoder = encoder;
381
382 /* select a crtc for this connector and then attempt to configure
383 remaining connectors */
384 c = 0;
385 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
386
Dave Airliea3a05442009-08-31 15:16:30 +1000387 if ((encoder->possible_crtcs & (1 << c)) == 0) {
Dave Airlief453ba02008-11-07 14:05:41 -0800388 c++;
389 continue;
390 }
391
392 for (o = 0; o < n; o++)
393 if (best_crtcs[o] == crtc)
394 break;
395
396 if (o < n) {
397 /* ignore cloning for now */
398 c++;
399 continue;
400 }
401
402 crtcs[n] = crtc;
403 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *));
404 score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1,
405 width, height);
406 if (score > best_score) {
407 best_crtc = crtc;
408 best_score = score;
409 memcpy(best_crtcs, crtcs,
410 dev->mode_config.num_connector *
411 sizeof(struct drm_crtc *));
412 }
413 c++;
414 }
415out:
416 kfree(crtcs);
417 return best_score;
418}
419
420static void drm_setup_crtcs(struct drm_device *dev)
421{
422 struct drm_crtc **crtcs;
423 struct drm_display_mode **modes;
424 struct drm_encoder *encoder;
425 struct drm_connector *connector;
426 bool *enabled;
427 int width, height;
428 int i, ret;
429
Zhao Yakui58367ed2009-07-20 13:48:07 +0800430 DRM_DEBUG_KMS("\n");
Jesse Barnes40a518d2009-01-12 12:05:32 -0800431
Dave Airlief453ba02008-11-07 14:05:41 -0800432 width = dev->mode_config.max_width;
433 height = dev->mode_config.max_height;
434
435 /* clean out all the encoder/crtc combos */
436 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
437 encoder->crtc = NULL;
438 }
439
440 crtcs = kcalloc(dev->mode_config.num_connector,
441 sizeof(struct drm_crtc *), GFP_KERNEL);
442 modes = kcalloc(dev->mode_config.num_connector,
443 sizeof(struct drm_display_mode *), GFP_KERNEL);
444 enabled = kcalloc(dev->mode_config.num_connector,
445 sizeof(bool), GFP_KERNEL);
446
447 drm_enable_connectors(dev, enabled);
448
449 ret = drm_target_preferred(dev, modes, enabled, width, height);
450 if (!ret)
451 DRM_ERROR("Unable to find initial modes\n");
452
Zhao Yakui58367ed2009-07-20 13:48:07 +0800453 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
Jesse Barnes40a518d2009-01-12 12:05:32 -0800454
Dave Airlief453ba02008-11-07 14:05:41 -0800455 drm_pick_crtcs(dev, crtcs, modes, 0, width, height);
456
457 i = 0;
458 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
459 struct drm_display_mode *mode = modes[i];
460 struct drm_crtc *crtc = crtcs[i];
461
462 if (connector->encoder == NULL) {
463 i++;
464 continue;
465 }
466
467 if (mode && crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800468 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
Jesse Barnes40a518d2009-01-12 12:05:32 -0800469 mode->name, crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800470 crtc->desired_mode = mode;
471 connector->encoder->crtc = crtc;
Dave Airliea3a05442009-08-31 15:16:30 +1000472 } else {
Dave Airlief453ba02008-11-07 14:05:41 -0800473 connector->encoder->crtc = NULL;
Dave Airliea3a05442009-08-31 15:16:30 +1000474 connector->encoder = NULL;
475 }
Dave Airlief453ba02008-11-07 14:05:41 -0800476 i++;
477 }
478
479 kfree(crtcs);
480 kfree(modes);
481 kfree(enabled);
482}
Jesse Barnes7bec7562009-02-23 16:09:34 -0800483
484/**
485 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
486 * @encoder: encoder to test
487 * @crtc: crtc to test
488 *
489 * Return false if @encoder can't be driven by @crtc, true otherwise.
490 */
491static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
492 struct drm_crtc *crtc)
493{
494 struct drm_device *dev;
495 struct drm_crtc *tmp;
496 int crtc_mask = 1;
497
498 WARN(!crtc, "checking null crtc?");
499
500 dev = crtc->dev;
501
502 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
503 if (tmp == crtc)
504 break;
505 crtc_mask <<= 1;
506 }
507
508 if (encoder->possible_crtcs & crtc_mask)
509 return true;
510 return false;
511}
512
513/*
514 * Check the CRTC we're going to map each output to vs. its current
515 * CRTC. If they don't match, we have to disable the output and the CRTC
516 * since the driver will have to re-route things.
517 */
518static void
519drm_crtc_prepare_encoders(struct drm_device *dev)
520{
521 struct drm_encoder_helper_funcs *encoder_funcs;
522 struct drm_encoder *encoder;
523
524 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
525 encoder_funcs = encoder->helper_private;
526 /* Disable unused encoders */
527 if (encoder->crtc == NULL)
528 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
529 /* Disable encoders whose CRTC is about to change */
530 if (encoder_funcs->get_crtc &&
531 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
532 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
533 }
534}
535
Dave Airlief453ba02008-11-07 14:05:41 -0800536/**
537 * drm_crtc_set_mode - set a mode
538 * @crtc: CRTC to program
539 * @mode: mode to use
540 * @x: width of mode
541 * @y: height of mode
542 *
543 * LOCKING:
544 * Caller must hold mode config lock.
545 *
546 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
547 * to fixup or reject the mode prior to trying to set it.
548 *
549 * RETURNS:
550 * True if the mode was set successfully, or false otherwise.
551 */
552bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
553 struct drm_display_mode *mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500554 int x, int y,
555 struct drm_framebuffer *old_fb)
Dave Airlief453ba02008-11-07 14:05:41 -0800556{
557 struct drm_device *dev = crtc->dev;
558 struct drm_display_mode *adjusted_mode, saved_mode;
559 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
560 struct drm_encoder_helper_funcs *encoder_funcs;
561 int saved_x, saved_y;
562 struct drm_encoder *encoder;
563 bool ret = true;
564
565 adjusted_mode = drm_mode_duplicate(dev, mode);
566
567 crtc->enabled = drm_helper_crtc_in_use(crtc);
568
569 if (!crtc->enabled)
570 return true;
571
572 saved_mode = crtc->mode;
573 saved_x = crtc->x;
574 saved_y = crtc->y;
575
576 /* Update crtc values up front so the driver can rely on them for mode
577 * setting.
578 */
579 crtc->mode = *mode;
580 crtc->x = x;
581 crtc->y = y;
582
Dave Airlief453ba02008-11-07 14:05:41 -0800583 /* Pass our mode to the connectors and the CRTC to give them a chance to
584 * adjust it according to limitations or connector properties, and also
585 * a chance to reject the mode entirely.
586 */
587 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
588
589 if (encoder->crtc != crtc)
590 continue;
591 encoder_funcs = encoder->helper_private;
592 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
593 adjusted_mode))) {
594 goto done;
595 }
596 }
597
598 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
599 goto done;
600 }
601
602 /* Prepare the encoders and CRTCs before setting the mode. */
603 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
604
605 if (encoder->crtc != crtc)
606 continue;
607 encoder_funcs = encoder->helper_private;
608 /* Disable the encoders as the first thing we do. */
609 encoder_funcs->prepare(encoder);
610 }
611
Jesse Barnes7bec7562009-02-23 16:09:34 -0800612 drm_crtc_prepare_encoders(dev);
613
Dave Airlief453ba02008-11-07 14:05:41 -0800614 crtc_funcs->prepare(crtc);
615
616 /* Set up the DPLL and any encoders state that needs to adjust or depend
617 * on the DPLL.
618 */
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000619 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
620 if (!ret)
621 goto done;
Dave Airlief453ba02008-11-07 14:05:41 -0800622
623 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
624
625 if (encoder->crtc != crtc)
626 continue;
627
628 DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder),
629 mode->name, mode->base.id);
630 encoder_funcs = encoder->helper_private;
631 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
632 }
633
634 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
635 crtc_funcs->commit(crtc);
636
637 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
638
639 if (encoder->crtc != crtc)
640 continue;
641
642 encoder_funcs = encoder->helper_private;
643 encoder_funcs->commit(encoder);
644
645 }
646
647 /* XXX free adjustedmode */
648 drm_mode_destroy(dev, adjusted_mode);
649 /* FIXME: add subpixel order */
650done:
651 if (!ret) {
652 crtc->mode = saved_mode;
653 crtc->x = saved_x;
654 crtc->y = saved_y;
655 }
656
657 return ret;
658}
659EXPORT_SYMBOL(drm_crtc_helper_set_mode);
660
661
662/**
663 * drm_crtc_helper_set_config - set a new config from userspace
664 * @crtc: CRTC to setup
665 * @crtc_info: user provided configuration
666 * @new_mode: new mode to set
667 * @connector_set: set of connectors for the new config
668 * @fb: new framebuffer
669 *
670 * LOCKING:
671 * Caller must hold mode config lock.
672 *
673 * Setup a new configuration, provided by the user in @crtc_info, and enable
674 * it.
675 *
676 * RETURNS:
677 * Zero. (FIXME)
678 */
679int drm_crtc_helper_set_config(struct drm_mode_set *set)
680{
681 struct drm_device *dev;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200682 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
683 struct drm_encoder *save_encoders, *new_encoder, *encoder;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800684 struct drm_framebuffer *old_fb = NULL;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100685 bool mode_changed = false; /* if true do a full mode set */
686 bool fb_changed = false; /* if true and !mode_changed just do a flip */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200687 struct drm_connector *save_connectors, *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800688 int count = 0, ro, fail = 0;
689 struct drm_crtc_helper_funcs *crtc_funcs;
690 int ret = 0;
691
Zhao Yakui58367ed2009-07-20 13:48:07 +0800692 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800693
694 if (!set)
695 return -EINVAL;
696
697 if (!set->crtc)
698 return -EINVAL;
699
700 if (!set->crtc->helper_private)
701 return -EINVAL;
702
703 crtc_funcs = set->crtc->helper_private;
704
Zhao Yakui58367ed2009-07-20 13:48:07 +0800705 DRM_DEBUG_KMS("crtc: %p %d fb: %p connectors: %p num_connectors:"
706 " %d (x, y) (%i, %i)\n",
Dave Airlief453ba02008-11-07 14:05:41 -0800707 set->crtc, set->crtc->base.id, set->fb, set->connectors,
708 (int)set->num_connectors, set->x, set->y);
709
710 dev = set->crtc->dev;
711
Maarten Maathuise67aae72009-08-27 10:18:29 +0200712 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
713 * connector data. */
714 save_crtcs = kzalloc(dev->mode_config.num_crtc *
715 sizeof(struct drm_crtc), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800716 if (!save_crtcs)
717 return -ENOMEM;
718
Maarten Maathuise67aae72009-08-27 10:18:29 +0200719 save_encoders = kzalloc(dev->mode_config.num_encoder *
720 sizeof(struct drm_encoder), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800721 if (!save_encoders) {
722 kfree(save_crtcs);
723 return -ENOMEM;
724 }
725
Maarten Maathuise67aae72009-08-27 10:18:29 +0200726 save_connectors = kzalloc(dev->mode_config.num_connector *
727 sizeof(struct drm_connector), GFP_KERNEL);
728 if (!save_connectors) {
729 kfree(save_crtcs);
730 kfree(save_encoders);
731 return -ENOMEM;
732 }
733
734 /* Copy data. Note that driver private data is not affected.
735 * Should anything bad happen only the expected state is
736 * restored, not the drivers personal bookkeeping.
737 */
738 count = 0;
739 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
740 save_crtcs[count++] = *crtc;
741 }
742
743 count = 0;
744 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
745 save_encoders[count++] = *encoder;
746 }
747
748 count = 0;
749 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
750 save_connectors[count++] = *connector;
751 }
752
Dave Airlief453ba02008-11-07 14:05:41 -0800753 /* We should be able to check here if the fb has the same properties
754 * and then just flip_or_move it */
755 if (set->crtc->fb != set->fb) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800756 /* If we have no fb then treat it as a full mode set */
Jesse Barnes7bec7562009-02-23 16:09:34 -0800757 if (set->crtc->fb == NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800758 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800759 mode_changed = true;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100760 } else if (set->fb == NULL) {
761 mode_changed = true;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800762 } else if ((set->fb->bits_per_pixel !=
Jesse Barnes712531b2009-01-09 13:56:14 -0800763 set->crtc->fb->bits_per_pixel) ||
764 set->fb->depth != set->crtc->fb->depth)
765 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800766 else
Jesse Barnes712531b2009-01-09 13:56:14 -0800767 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800768 }
769
770 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800771 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800772
773 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800774 DRM_DEBUG_KMS("modes are different, full mode set\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800775 drm_mode_debug_printmodeline(&set->crtc->mode);
776 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800777 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800778 }
779
780 /* a) traverse passed in connector list and get encoders for them */
781 count = 0;
782 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
783 struct drm_connector_helper_funcs *connector_funcs =
784 connector->helper_private;
Dave Airlief453ba02008-11-07 14:05:41 -0800785 new_encoder = connector->encoder;
786 for (ro = 0; ro < set->num_connectors; ro++) {
787 if (set->connectors[ro] == connector) {
788 new_encoder = connector_funcs->best_encoder(connector);
789 /* if we can't get an encoder for a connector
790 we are setting now - then fail */
791 if (new_encoder == NULL)
792 /* don't break so fail path works correct */
793 fail = 1;
794 break;
795 }
796 }
797
798 if (new_encoder != connector->encoder) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800799 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800800 mode_changed = true;
Maarten Maathuisff846ab2009-08-19 00:56:45 +0200801 /* If the encoder is reused for another connector, then
802 * the appropriate crtc will be set later.
803 */
Maarten Maathuisff6fdbe2009-09-01 03:39:04 +0200804 if (connector->encoder)
805 connector->encoder->crtc = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800806 connector->encoder = new_encoder;
807 }
808 }
809
810 if (fail) {
811 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200812 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800813 }
814
815 count = 0;
816 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
817 if (!connector->encoder)
818 continue;
819
Dave Airlief453ba02008-11-07 14:05:41 -0800820 if (connector->encoder->crtc == set->crtc)
821 new_crtc = NULL;
822 else
823 new_crtc = connector->encoder->crtc;
824
825 for (ro = 0; ro < set->num_connectors; ro++) {
826 if (set->connectors[ro] == connector)
827 new_crtc = set->crtc;
828 }
Jesse Barnes7bec7562009-02-23 16:09:34 -0800829
830 /* Make sure the new CRTC will work with the encoder */
831 if (new_crtc &&
832 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
833 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200834 goto fail;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800835 }
Dave Airlief453ba02008-11-07 14:05:41 -0800836 if (new_crtc != connector->encoder->crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800837 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800838 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800839 connector->encoder->crtc = new_crtc;
840 }
Zhao Yakui58367ed2009-07-20 13:48:07 +0800841 DRM_DEBUG_KMS("setting connector %d crtc to %p\n",
Jesse Barnes7bec7562009-02-23 16:09:34 -0800842 connector->base.id, new_crtc);
Dave Airlief453ba02008-11-07 14:05:41 -0800843 }
844
845 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800846 if (fb_changed && !crtc_funcs->mode_set_base)
847 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800848
Jesse Barnes712531b2009-01-09 13:56:14 -0800849 if (mode_changed) {
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500850 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800851 set->crtc->fb = set->fb;
852 set->crtc->enabled = (set->mode != NULL);
853 if (set->mode != NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800854 DRM_DEBUG_KMS("attempting to set mode from"
855 " userspace\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800856 drm_mode_debug_printmodeline(set->mode);
857 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500858 set->x, set->y,
859 old_fb)) {
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000860 DRM_ERROR("failed to set mode on crtc %p\n",
861 set->crtc);
Dave Airlief453ba02008-11-07 14:05:41 -0800862 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200863 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800864 }
865 /* TODO are these needed? */
866 set->crtc->desired_x = set->x;
867 set->crtc->desired_y = set->y;
868 set->crtc->desired_mode = set->mode;
869 }
870 drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800871 } else if (fb_changed) {
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500872 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800873 if (set->crtc->fb != set->fb)
874 set->crtc->fb = set->fb;
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000875 ret = crtc_funcs->mode_set_base(set->crtc,
876 set->x, set->y, old_fb);
877 if (ret != 0)
Maarten Maathuise67aae72009-08-27 10:18:29 +0200878 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800879 }
880
Maarten Maathuise67aae72009-08-27 10:18:29 +0200881 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800882 kfree(save_encoders);
883 kfree(save_crtcs);
884 return 0;
885
Maarten Maathuise67aae72009-08-27 10:18:29 +0200886fail:
887 /* Restore all previous data. */
Dave Airlief453ba02008-11-07 14:05:41 -0800888 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200889 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
890 *crtc = save_crtcs[count++];
891 }
Chris Wilsone62fb642009-02-11 16:39:21 +0000892
Maarten Maathuise67aae72009-08-27 10:18:29 +0200893 count = 0;
894 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
895 *encoder = save_encoders[count++];
Chris Wilsone62fb642009-02-11 16:39:21 +0000896 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200897
Dave Airlief453ba02008-11-07 14:05:41 -0800898 count = 0;
899 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200900 *connector = save_connectors[count++];
Dave Airlief453ba02008-11-07 14:05:41 -0800901 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200902
903 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800904 kfree(save_encoders);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200905 kfree(save_crtcs);
Dave Airlief453ba02008-11-07 14:05:41 -0800906 return ret;
907}
908EXPORT_SYMBOL(drm_crtc_helper_set_config);
909
910bool drm_helper_plugged_event(struct drm_device *dev)
911{
Zhao Yakui58367ed2009-07-20 13:48:07 +0800912 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800913
914 drm_helper_probe_connector_modes(dev, dev->mode_config.max_width,
915 dev->mode_config.max_height);
916
917 drm_setup_crtcs(dev);
918
919 /* alert the driver fb layer */
920 dev->mode_config.funcs->fb_changed(dev);
921
922 /* FIXME: send hotplug event */
923 return true;
924}
925/**
926 * drm_initial_config - setup a sane initial connector configuration
927 * @dev: DRM device
Dave Airlief453ba02008-11-07 14:05:41 -0800928 *
929 * LOCKING:
930 * Called at init time, must take mode config lock.
931 *
932 * Scan the CRTCs and connectors and try to put together an initial setup.
933 * At the moment, this is a cloned configuration across all heads with
934 * a new framebuffer object as the backing store.
935 *
936 * RETURNS:
937 * Zero if everything went ok, nonzero otherwise.
938 */
Jesse Barnes7a1fb5d2009-03-27 13:05:19 -0700939bool drm_helper_initial_config(struct drm_device *dev)
Dave Airlief453ba02008-11-07 14:05:41 -0800940{
Jesse Barnes40a518d2009-01-12 12:05:32 -0800941 int count = 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800942
Jesse Barnes40a518d2009-01-12 12:05:32 -0800943 count = drm_helper_probe_connector_modes(dev,
944 dev->mode_config.max_width,
945 dev->mode_config.max_height);
946
947 /*
Dave Airlie575dc342009-09-07 18:43:26 +1000948 * we shouldn't end up with no modes here.
Jesse Barnes40a518d2009-01-12 12:05:32 -0800949 */
Dave Airlie575dc342009-09-07 18:43:26 +1000950 WARN(!count, "Connected connector with 0 modes\n");
Jesse Barnes40a518d2009-01-12 12:05:32 -0800951
952 drm_setup_crtcs(dev);
953
954 /* alert the driver fb layer */
955 dev->mode_config.funcs->fb_changed(dev);
956
957 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800958}
959EXPORT_SYMBOL(drm_helper_initial_config);
960
Keith Packardc9fb15f2009-05-30 20:42:28 -0700961static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
962{
963 int dpms = DRM_MODE_DPMS_OFF;
964 struct drm_connector *connector;
965 struct drm_device *dev = encoder->dev;
966
967 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
968 if (connector->encoder == encoder)
969 if (connector->dpms < dpms)
970 dpms = connector->dpms;
971 return dpms;
972}
973
974static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
975{
976 int dpms = DRM_MODE_DPMS_OFF;
977 struct drm_connector *connector;
978 struct drm_device *dev = crtc->dev;
979
980 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
981 if (connector->encoder && connector->encoder->crtc == crtc)
982 if (connector->dpms < dpms)
983 dpms = connector->dpms;
984 return dpms;
985}
986
987/**
988 * drm_helper_connector_dpms
989 * @connector affected connector
990 * @mode DPMS mode
991 *
992 * Calls the low-level connector DPMS function, then
993 * calls appropriate encoder and crtc DPMS functions as well
994 */
995void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
996{
997 struct drm_encoder *encoder = connector->encoder;
998 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
999 int old_dpms;
1000
1001 if (mode == connector->dpms)
1002 return;
1003
1004 old_dpms = connector->dpms;
1005 connector->dpms = mode;
1006
1007 /* from off to on, do crtc then encoder */
1008 if (mode < old_dpms) {
1009 if (crtc) {
1010 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
1011 if (crtc_funcs->dpms)
1012 (*crtc_funcs->dpms) (crtc,
1013 drm_helper_choose_crtc_dpms(crtc));
1014 }
1015 if (encoder) {
1016 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
1017 if (encoder_funcs->dpms)
1018 (*encoder_funcs->dpms) (encoder,
1019 drm_helper_choose_encoder_dpms(encoder));
1020 }
1021 }
1022
1023 /* from on to off, do encoder then crtc */
1024 if (mode > old_dpms) {
1025 if (encoder) {
1026 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
1027 if (encoder_funcs->dpms)
1028 (*encoder_funcs->dpms) (encoder,
1029 drm_helper_choose_encoder_dpms(encoder));
1030 }
1031 if (crtc) {
1032 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
1033 if (crtc_funcs->dpms)
1034 (*crtc_funcs->dpms) (crtc,
1035 drm_helper_choose_crtc_dpms(crtc));
1036 }
1037 }
1038
1039 return;
1040}
1041EXPORT_SYMBOL(drm_helper_connector_dpms);
1042
Dave Airlief453ba02008-11-07 14:05:41 -08001043/**
1044 * drm_hotplug_stage_two
1045 * @dev DRM device
1046 * @connector hotpluged connector
1047 *
1048 * LOCKING.
1049 * Caller must hold mode config lock, function might grab struct lock.
1050 *
1051 * Stage two of a hotplug.
1052 *
1053 * RETURNS:
1054 * Zero on success, errno on failure.
1055 */
1056int drm_helper_hotplug_stage_two(struct drm_device *dev)
1057{
Dave Airlief453ba02008-11-07 14:05:41 -08001058 drm_helper_plugged_event(dev);
1059
1060 return 0;
1061}
1062EXPORT_SYMBOL(drm_helper_hotplug_stage_two);
1063
1064int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
1065 struct drm_mode_fb_cmd *mode_cmd)
1066{
1067 fb->width = mode_cmd->width;
1068 fb->height = mode_cmd->height;
1069 fb->pitch = mode_cmd->pitch;
1070 fb->bits_per_pixel = mode_cmd->bpp;
1071 fb->depth = mode_cmd->depth;
1072
1073 return 0;
1074}
1075EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
1076
1077int drm_helper_resume_force_mode(struct drm_device *dev)
1078{
1079 struct drm_crtc *crtc;
1080 int ret;
1081
1082 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1083
1084 if (!crtc->enabled)
1085 continue;
1086
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -05001087 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
1088 crtc->x, crtc->y, crtc->fb);
Dave Airlief453ba02008-11-07 14:05:41 -08001089
1090 if (ret == false)
1091 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
1092 }
Zhao Yakuiaf4fcb52009-07-08 14:13:13 +08001093 /* disable the unused connectors while restoring the modesetting */
1094 drm_helper_disable_unused_functions(dev);
Dave Airlief453ba02008-11-07 14:05:41 -08001095 return 0;
1096}
1097EXPORT_SYMBOL(drm_helper_resume_force_mode);