blob: 964c5eb1fada4266795056abbad038ac23463dd7 [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
36/*
Dave Airlieaa91c662008-12-08 14:55:27 +100037 * Detailed mode info for 800x600@60Hz
Dave Airlief453ba02008-11-07 14:05:41 -080038 */
Jesse Barnes40a518d2009-01-12 12:05:32 -080039static struct drm_display_mode std_modes[] = {
Dave Airlieaa91c662008-12-08 14:55:27 +100040 { DRM_MODE("800x600", DRM_MODE_TYPE_DEFAULT, 40000, 800, 840,
41 968, 1056, 0, 600, 601, 605, 628, 0,
42 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
Dave Airlief453ba02008-11-07 14:05:41 -080043};
44
45/**
46 * drm_helper_probe_connector_modes - get complete set of display modes
47 * @dev: DRM device
48 * @maxX: max width for modes
49 * @maxY: max height for modes
50 *
51 * LOCKING:
52 * Caller must hold mode config lock.
53 *
54 * Based on @dev's mode_config layout, scan all the connectors and try to detect
55 * modes on them. Modes will first be added to the connector's probed_modes
56 * list, then culled (based on validity and the @maxX, @maxY parameters) and
57 * put into the normal modes list.
58 *
59 * Intended to be used either at bootup time or when major configuration
60 * changes have occurred.
61 *
62 * FIXME: take into account monitor limits
Jesse Barnes40a518d2009-01-12 12:05:32 -080063 *
64 * RETURNS:
65 * Number of modes found on @connector.
Dave Airlief453ba02008-11-07 14:05:41 -080066 */
Jesse Barnes40a518d2009-01-12 12:05:32 -080067int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
68 uint32_t maxX, uint32_t maxY)
Dave Airlief453ba02008-11-07 14:05:41 -080069{
70 struct drm_device *dev = connector->dev;
71 struct drm_display_mode *mode, *t;
72 struct drm_connector_helper_funcs *connector_funcs =
73 connector->helper_private;
Jesse Barnes40a518d2009-01-12 12:05:32 -080074 int count = 0;
Dave Airlief453ba02008-11-07 14:05:41 -080075
76 DRM_DEBUG("%s\n", drm_get_connector_name(connector));
77 /* set all modes to the unverified state */
78 list_for_each_entry_safe(mode, t, &connector->modes, head)
79 mode->status = MODE_UNVERIFIED;
80
81 connector->status = connector->funcs->detect(connector);
82
83 if (connector->status == connector_status_disconnected) {
84 DRM_DEBUG("%s is disconnected\n",
85 drm_get_connector_name(connector));
86 /* TODO set EDID to NULL */
Jesse Barnes40a518d2009-01-12 12:05:32 -080087 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -080088 }
89
Jesse Barnes40a518d2009-01-12 12:05:32 -080090 count = (*connector_funcs->get_modes)(connector);
91 if (!count)
92 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -080093
Jesse Barnes40a518d2009-01-12 12:05:32 -080094 drm_mode_connector_list_update(connector);
Dave Airlief453ba02008-11-07 14:05:41 -080095
96 if (maxX && maxY)
97 drm_mode_validate_size(dev, &connector->modes, maxX,
98 maxY, 0);
99 list_for_each_entry_safe(mode, t, &connector->modes, head) {
100 if (mode->status == MODE_OK)
101 mode->status = connector_funcs->mode_valid(connector,
102 mode);
103 }
104
105
106 drm_mode_prune_invalid(dev, &connector->modes, true);
107
Jesse Barnes40a518d2009-01-12 12:05:32 -0800108 if (list_empty(&connector->modes))
109 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800110
111 drm_mode_sort(&connector->modes);
112
113 DRM_DEBUG("Probed modes for %s\n", drm_get_connector_name(connector));
114 list_for_each_entry_safe(mode, t, &connector->modes, head) {
115 mode->vrefresh = drm_mode_vrefresh(mode);
116
117 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
118 drm_mode_debug_printmodeline(mode);
119 }
Jesse Barnes40a518d2009-01-12 12:05:32 -0800120
121 return count;
Dave Airlief453ba02008-11-07 14:05:41 -0800122}
123EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
124
Jesse Barnes40a518d2009-01-12 12:05:32 -0800125int drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX,
Dave Airlief453ba02008-11-07 14:05:41 -0800126 uint32_t maxY)
127{
128 struct drm_connector *connector;
Jesse Barnes40a518d2009-01-12 12:05:32 -0800129 int count = 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800130
131 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Jesse Barnes40a518d2009-01-12 12:05:32 -0800132 count += drm_helper_probe_single_connector_modes(connector,
133 maxX, maxY);
Dave Airlief453ba02008-11-07 14:05:41 -0800134 }
Jesse Barnes40a518d2009-01-12 12:05:32 -0800135
136 return count;
Dave Airlief453ba02008-11-07 14:05:41 -0800137}
138EXPORT_SYMBOL(drm_helper_probe_connector_modes);
139
Jesse Barnes40a518d2009-01-12 12:05:32 -0800140static void drm_helper_add_std_modes(struct drm_device *dev,
141 struct drm_connector *connector)
142{
143 struct drm_display_mode *mode, *t;
144 int i;
145
146 for (i = 0; i < ARRAY_SIZE(std_modes); i++) {
147 struct drm_display_mode *stdmode;
148
149 /*
150 * When no valid EDID modes are available we end up
151 * here and bailed in the past, now we add some standard
152 * modes and move on.
153 */
154 stdmode = drm_mode_duplicate(dev, &std_modes[i]);
155 drm_mode_probed_add(connector, stdmode);
156 drm_mode_list_concat(&connector->probed_modes,
157 &connector->modes);
158
159 DRM_DEBUG("Adding mode %s to %s\n", stdmode->name,
160 drm_get_connector_name(connector));
161 }
162 drm_mode_sort(&connector->modes);
163
164 DRM_DEBUG("Added std modes on %s\n", drm_get_connector_name(connector));
165 list_for_each_entry_safe(mode, t, &connector->modes, head) {
166 mode->vrefresh = drm_mode_vrefresh(mode);
167
168 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
169 drm_mode_debug_printmodeline(mode);
170 }
171}
Dave Airlief453ba02008-11-07 14:05:41 -0800172
173/**
174 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
175 * @crtc: CRTC to check
176 *
177 * LOCKING:
178 * Caller must hold mode config lock.
179 *
180 * Walk @crtc's DRM device's mode_config and see if it's in use.
181 *
182 * RETURNS:
183 * True if @crtc is part of the mode_config, false otherwise.
184 */
185bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
186{
187 struct drm_encoder *encoder;
188 struct drm_device *dev = crtc->dev;
189 /* FIXME: Locking around list access? */
190 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
191 if (encoder->crtc == crtc)
192 return true;
193 return false;
194}
195EXPORT_SYMBOL(drm_helper_crtc_in_use);
196
197/**
198 * drm_disable_unused_functions - disable unused objects
199 * @dev: DRM device
200 *
201 * LOCKING:
202 * Caller must hold mode config lock.
203 *
204 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
205 * by calling its dpms function, which should power it off.
206 */
207void drm_helper_disable_unused_functions(struct drm_device *dev)
208{
209 struct drm_encoder *encoder;
210 struct drm_encoder_helper_funcs *encoder_funcs;
211 struct drm_crtc *crtc;
212
213 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
214 encoder_funcs = encoder->helper_private;
215 if (!encoder->crtc)
216 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
217 }
218
219 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
220 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
221 crtc->enabled = drm_helper_crtc_in_use(crtc);
222 if (!crtc->enabled) {
223 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
224 crtc->fb = NULL;
225 }
226 }
227}
228EXPORT_SYMBOL(drm_helper_disable_unused_functions);
229
230static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height)
231{
232 struct drm_display_mode *mode;
233
234 list_for_each_entry(mode, &connector->modes, head) {
235 if (drm_mode_width(mode) > width ||
236 drm_mode_height(mode) > height)
237 continue;
238 if (mode->type & DRM_MODE_TYPE_PREFERRED)
239 return mode;
240 }
241 return NULL;
242}
243
244static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
245{
246 bool enable;
247
248 if (strict) {
249 enable = connector->status == connector_status_connected;
250 } else {
251 enable = connector->status != connector_status_disconnected;
252 }
253 return enable;
254}
255
256static void drm_enable_connectors(struct drm_device *dev, bool *enabled)
257{
258 bool any_enabled = false;
259 struct drm_connector *connector;
260 int i = 0;
261
262 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
263 enabled[i] = drm_connector_enabled(connector, true);
Jesse Barnes40a518d2009-01-12 12:05:32 -0800264 DRM_DEBUG("connector %d enabled? %s\n", connector->base.id,
265 enabled[i] ? "yes" : "no");
Dave Airlief453ba02008-11-07 14:05:41 -0800266 any_enabled |= enabled[i];
267 i++;
268 }
269
270 if (any_enabled)
271 return;
272
273 i = 0;
274 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
275 enabled[i] = drm_connector_enabled(connector, false);
276 i++;
277 }
278}
279
280static bool drm_target_preferred(struct drm_device *dev,
281 struct drm_display_mode **modes,
282 bool *enabled, int width, int height)
283{
284 struct drm_connector *connector;
285 int i = 0;
286
287 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
288
289 if (enabled[i] == false) {
290 i++;
291 continue;
292 }
293
Jesse Barnes40a518d2009-01-12 12:05:32 -0800294 DRM_DEBUG("looking for preferred mode on connector %d\n",
295 connector->base.id);
296
Dave Airlief453ba02008-11-07 14:05:41 -0800297 modes[i] = drm_has_preferred_mode(connector, width, height);
Jesse Barnes40a518d2009-01-12 12:05:32 -0800298 /* No preferred modes, pick one off the list */
299 if (!modes[i] && !list_empty(&connector->modes)) {
Dave Airlief453ba02008-11-07 14:05:41 -0800300 list_for_each_entry(modes[i], &connector->modes, head)
301 break;
302 }
Jesse Barnes40a518d2009-01-12 12:05:32 -0800303 DRM_DEBUG("found mode %s\n", modes[i] ? modes[i]->name :
304 "none");
Dave Airlief453ba02008-11-07 14:05:41 -0800305 i++;
306 }
307 return true;
308}
309
310static int drm_pick_crtcs(struct drm_device *dev,
311 struct drm_crtc **best_crtcs,
312 struct drm_display_mode **modes,
313 int n, int width, int height)
314{
315 int c, o;
316 struct drm_connector *connector;
317 struct drm_connector_helper_funcs *connector_funcs;
318 struct drm_encoder *encoder;
319 struct drm_crtc *best_crtc;
320 int my_score, best_score, score;
321 struct drm_crtc **crtcs, *crtc;
322
323 if (n == dev->mode_config.num_connector)
324 return 0;
325 c = 0;
326 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
327 if (c == n)
328 break;
329 c++;
330 }
331
332 best_crtcs[n] = NULL;
333 best_crtc = NULL;
334 best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height);
335 if (modes[n] == NULL)
336 return best_score;
337
338 crtcs = kmalloc(dev->mode_config.num_connector *
339 sizeof(struct drm_crtc *), GFP_KERNEL);
340 if (!crtcs)
341 return best_score;
342
343 my_score = 1;
344 if (connector->status == connector_status_connected)
345 my_score++;
346 if (drm_has_preferred_mode(connector, width, height))
347 my_score++;
348
349 connector_funcs = connector->helper_private;
350 encoder = connector_funcs->best_encoder(connector);
351 if (!encoder)
352 goto out;
353
354 connector->encoder = encoder;
355
356 /* select a crtc for this connector and then attempt to configure
357 remaining connectors */
358 c = 0;
359 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
360
361 if ((connector->encoder->possible_crtcs & (1 << c)) == 0) {
362 c++;
363 continue;
364 }
365
366 for (o = 0; o < n; o++)
367 if (best_crtcs[o] == crtc)
368 break;
369
370 if (o < n) {
371 /* ignore cloning for now */
372 c++;
373 continue;
374 }
375
376 crtcs[n] = crtc;
377 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *));
378 score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1,
379 width, height);
380 if (score > best_score) {
381 best_crtc = crtc;
382 best_score = score;
383 memcpy(best_crtcs, crtcs,
384 dev->mode_config.num_connector *
385 sizeof(struct drm_crtc *));
386 }
387 c++;
388 }
389out:
390 kfree(crtcs);
391 return best_score;
392}
393
394static void drm_setup_crtcs(struct drm_device *dev)
395{
396 struct drm_crtc **crtcs;
397 struct drm_display_mode **modes;
398 struct drm_encoder *encoder;
399 struct drm_connector *connector;
400 bool *enabled;
401 int width, height;
402 int i, ret;
403
Jesse Barnes40a518d2009-01-12 12:05:32 -0800404 DRM_DEBUG("\n");
405
Dave Airlief453ba02008-11-07 14:05:41 -0800406 width = dev->mode_config.max_width;
407 height = dev->mode_config.max_height;
408
409 /* clean out all the encoder/crtc combos */
410 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
411 encoder->crtc = NULL;
412 }
413
414 crtcs = kcalloc(dev->mode_config.num_connector,
415 sizeof(struct drm_crtc *), GFP_KERNEL);
416 modes = kcalloc(dev->mode_config.num_connector,
417 sizeof(struct drm_display_mode *), GFP_KERNEL);
418 enabled = kcalloc(dev->mode_config.num_connector,
419 sizeof(bool), GFP_KERNEL);
420
421 drm_enable_connectors(dev, enabled);
422
423 ret = drm_target_preferred(dev, modes, enabled, width, height);
424 if (!ret)
425 DRM_ERROR("Unable to find initial modes\n");
426
Jesse Barnes40a518d2009-01-12 12:05:32 -0800427 DRM_DEBUG("picking CRTCs for %dx%d config\n", width, height);
428
Dave Airlief453ba02008-11-07 14:05:41 -0800429 drm_pick_crtcs(dev, crtcs, modes, 0, width, height);
430
431 i = 0;
432 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
433 struct drm_display_mode *mode = modes[i];
434 struct drm_crtc *crtc = crtcs[i];
435
436 if (connector->encoder == NULL) {
437 i++;
438 continue;
439 }
440
441 if (mode && crtc) {
Jesse Barnes40a518d2009-01-12 12:05:32 -0800442 DRM_DEBUG("desired mode %s set on crtc %d\n",
443 mode->name, crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800444 crtc->desired_mode = mode;
445 connector->encoder->crtc = crtc;
446 } else
447 connector->encoder->crtc = NULL;
448 i++;
449 }
450
451 kfree(crtcs);
452 kfree(modes);
453 kfree(enabled);
454}
455/**
456 * drm_crtc_set_mode - set a mode
457 * @crtc: CRTC to program
458 * @mode: mode to use
459 * @x: width of mode
460 * @y: height of mode
461 *
462 * LOCKING:
463 * Caller must hold mode config lock.
464 *
465 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
466 * to fixup or reject the mode prior to trying to set it.
467 *
468 * RETURNS:
469 * True if the mode was set successfully, or false otherwise.
470 */
471bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
472 struct drm_display_mode *mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500473 int x, int y,
474 struct drm_framebuffer *old_fb)
Dave Airlief453ba02008-11-07 14:05:41 -0800475{
476 struct drm_device *dev = crtc->dev;
477 struct drm_display_mode *adjusted_mode, saved_mode;
478 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
479 struct drm_encoder_helper_funcs *encoder_funcs;
480 int saved_x, saved_y;
481 struct drm_encoder *encoder;
482 bool ret = true;
Jesse Barnes712531b2009-01-09 13:56:14 -0800483 bool depth_changed, bpp_changed;
Dave Airlief453ba02008-11-07 14:05:41 -0800484
485 adjusted_mode = drm_mode_duplicate(dev, mode);
486
487 crtc->enabled = drm_helper_crtc_in_use(crtc);
488
489 if (!crtc->enabled)
490 return true;
491
Jesse Barnes712531b2009-01-09 13:56:14 -0800492 if (old_fb && crtc->fb) {
493 depth_changed = (old_fb->depth != crtc->fb->depth);
494 bpp_changed = (old_fb->bits_per_pixel !=
495 crtc->fb->bits_per_pixel);
496 } else {
497 depth_changed = true;
498 bpp_changed = true;
499 }
500
Dave Airlief453ba02008-11-07 14:05:41 -0800501 saved_mode = crtc->mode;
502 saved_x = crtc->x;
503 saved_y = crtc->y;
504
505 /* Update crtc values up front so the driver can rely on them for mode
506 * setting.
507 */
508 crtc->mode = *mode;
509 crtc->x = x;
510 crtc->y = y;
511
512 if (drm_mode_equal(&saved_mode, &crtc->mode)) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800513 if (saved_x != crtc->x || saved_y != crtc->y ||
514 depth_changed || bpp_changed) {
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500515 crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y,
516 old_fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800517 goto done;
518 }
519 }
520
521 /* Pass our mode to the connectors and the CRTC to give them a chance to
522 * adjust it according to limitations or connector properties, and also
523 * a chance to reject the mode entirely.
524 */
525 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
526
527 if (encoder->crtc != crtc)
528 continue;
529 encoder_funcs = encoder->helper_private;
530 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
531 adjusted_mode))) {
532 goto done;
533 }
534 }
535
536 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
537 goto done;
538 }
539
540 /* Prepare the encoders and CRTCs before setting the mode. */
541 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
542
543 if (encoder->crtc != crtc)
544 continue;
545 encoder_funcs = encoder->helper_private;
546 /* Disable the encoders as the first thing we do. */
547 encoder_funcs->prepare(encoder);
548 }
549
550 crtc_funcs->prepare(crtc);
551
552 /* Set up the DPLL and any encoders state that needs to adjust or depend
553 * on the DPLL.
554 */
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500555 crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800556
557 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
558
559 if (encoder->crtc != crtc)
560 continue;
561
562 DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder),
563 mode->name, mode->base.id);
564 encoder_funcs = encoder->helper_private;
565 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
566 }
567
568 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
569 crtc_funcs->commit(crtc);
570
571 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
572
573 if (encoder->crtc != crtc)
574 continue;
575
576 encoder_funcs = encoder->helper_private;
577 encoder_funcs->commit(encoder);
578
579 }
580
581 /* XXX free adjustedmode */
582 drm_mode_destroy(dev, adjusted_mode);
583 /* FIXME: add subpixel order */
584done:
585 if (!ret) {
586 crtc->mode = saved_mode;
587 crtc->x = saved_x;
588 crtc->y = saved_y;
589 }
590
591 return ret;
592}
593EXPORT_SYMBOL(drm_crtc_helper_set_mode);
594
595
596/**
597 * drm_crtc_helper_set_config - set a new config from userspace
598 * @crtc: CRTC to setup
599 * @crtc_info: user provided configuration
600 * @new_mode: new mode to set
601 * @connector_set: set of connectors for the new config
602 * @fb: new framebuffer
603 *
604 * LOCKING:
605 * Caller must hold mode config lock.
606 *
607 * Setup a new configuration, provided by the user in @crtc_info, and enable
608 * it.
609 *
610 * RETURNS:
611 * Zero. (FIXME)
612 */
613int drm_crtc_helper_set_config(struct drm_mode_set *set)
614{
615 struct drm_device *dev;
616 struct drm_crtc **save_crtcs, *new_crtc;
617 struct drm_encoder **save_encoders, *new_encoder;
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500618 struct drm_framebuffer *old_fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800619 bool save_enabled;
Jesse Barnes712531b2009-01-09 13:56:14 -0800620 bool mode_changed = false;
621 bool fb_changed = false;
Dave Airlief453ba02008-11-07 14:05:41 -0800622 struct drm_connector *connector;
623 int count = 0, ro, fail = 0;
624 struct drm_crtc_helper_funcs *crtc_funcs;
625 int ret = 0;
626
627 DRM_DEBUG("\n");
628
629 if (!set)
630 return -EINVAL;
631
632 if (!set->crtc)
633 return -EINVAL;
634
635 if (!set->crtc->helper_private)
636 return -EINVAL;
637
638 crtc_funcs = set->crtc->helper_private;
639
640 DRM_DEBUG("crtc: %p %d fb: %p connectors: %p num_connectors: %d (x, y) (%i, %i)\n",
641 set->crtc, set->crtc->base.id, set->fb, set->connectors,
642 (int)set->num_connectors, set->x, set->y);
643
644 dev = set->crtc->dev;
645
646 /* save previous config */
647 save_enabled = set->crtc->enabled;
648
Jesse Barnes712531b2009-01-09 13:56:14 -0800649 /*
650 * We do mode_config.num_connectors here since we'll look at the
651 * CRTC and encoder associated with each connector later.
652 */
Dave Airlief453ba02008-11-07 14:05:41 -0800653 save_crtcs = kzalloc(dev->mode_config.num_connector *
654 sizeof(struct drm_crtc *), GFP_KERNEL);
655 if (!save_crtcs)
656 return -ENOMEM;
657
658 save_encoders = kzalloc(dev->mode_config.num_connector *
659 sizeof(struct drm_encoders *), GFP_KERNEL);
660 if (!save_encoders) {
661 kfree(save_crtcs);
662 return -ENOMEM;
663 }
664
665 /* We should be able to check here if the fb has the same properties
666 * and then just flip_or_move it */
667 if (set->crtc->fb != set->fb) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800668 /* If we have no fb then treat it as a full mode set */
Dave Airlief453ba02008-11-07 14:05:41 -0800669 if (set->crtc->fb == NULL)
Jesse Barnes712531b2009-01-09 13:56:14 -0800670 mode_changed = true;
671 else if ((set->fb->bits_per_pixel !=
672 set->crtc->fb->bits_per_pixel) ||
673 set->fb->depth != set->crtc->fb->depth)
674 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800675 else
Jesse Barnes712531b2009-01-09 13:56:14 -0800676 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800677 }
678
679 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800680 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800681
682 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
683 DRM_DEBUG("modes are different\n");
684 drm_mode_debug_printmodeline(&set->crtc->mode);
685 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800686 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800687 }
688
689 /* a) traverse passed in connector list and get encoders for them */
690 count = 0;
691 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
692 struct drm_connector_helper_funcs *connector_funcs =
693 connector->helper_private;
694 save_encoders[count++] = connector->encoder;
695 new_encoder = connector->encoder;
696 for (ro = 0; ro < set->num_connectors; ro++) {
697 if (set->connectors[ro] == connector) {
698 new_encoder = connector_funcs->best_encoder(connector);
699 /* if we can't get an encoder for a connector
700 we are setting now - then fail */
701 if (new_encoder == NULL)
702 /* don't break so fail path works correct */
703 fail = 1;
704 break;
705 }
706 }
707
708 if (new_encoder != connector->encoder) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800709 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800710 connector->encoder = new_encoder;
711 }
712 }
713
714 if (fail) {
715 ret = -EINVAL;
716 goto fail_no_encoder;
717 }
718
719 count = 0;
720 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
721 if (!connector->encoder)
722 continue;
723
724 save_crtcs[count++] = connector->encoder->crtc;
725
726 if (connector->encoder->crtc == set->crtc)
727 new_crtc = NULL;
728 else
729 new_crtc = connector->encoder->crtc;
730
731 for (ro = 0; ro < set->num_connectors; ro++) {
732 if (set->connectors[ro] == connector)
733 new_crtc = set->crtc;
734 }
735 if (new_crtc != connector->encoder->crtc) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800736 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800737 connector->encoder->crtc = new_crtc;
738 }
739 }
740
741 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800742 if (fb_changed && !crtc_funcs->mode_set_base)
743 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800744
Jesse Barnes712531b2009-01-09 13:56:14 -0800745 if (mode_changed) {
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500746 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800747 set->crtc->fb = set->fb;
748 set->crtc->enabled = (set->mode != NULL);
749 if (set->mode != NULL) {
750 DRM_DEBUG("attempting to set mode from userspace\n");
751 drm_mode_debug_printmodeline(set->mode);
752 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500753 set->x, set->y,
754 old_fb)) {
Dave Airlief453ba02008-11-07 14:05:41 -0800755 ret = -EINVAL;
756 goto fail_set_mode;
757 }
758 /* TODO are these needed? */
759 set->crtc->desired_x = set->x;
760 set->crtc->desired_y = set->y;
761 set->crtc->desired_mode = set->mode;
762 }
763 drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800764 } else if (fb_changed) {
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500765 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800766 if (set->crtc->fb != set->fb)
767 set->crtc->fb = set->fb;
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500768 crtc_funcs->mode_set_base(set->crtc, set->x, set->y, old_fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800769 }
770
771 kfree(save_encoders);
772 kfree(save_crtcs);
773 return 0;
774
775fail_set_mode:
776 set->crtc->enabled = save_enabled;
777 count = 0;
778 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
779 connector->encoder->crtc = save_crtcs[count++];
780fail_no_encoder:
781 kfree(save_crtcs);
782 count = 0;
783 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
784 connector->encoder = save_encoders[count++];
785 }
786 kfree(save_encoders);
787 return ret;
788}
789EXPORT_SYMBOL(drm_crtc_helper_set_config);
790
791bool drm_helper_plugged_event(struct drm_device *dev)
792{
793 DRM_DEBUG("\n");
794
795 drm_helper_probe_connector_modes(dev, dev->mode_config.max_width,
796 dev->mode_config.max_height);
797
798 drm_setup_crtcs(dev);
799
800 /* alert the driver fb layer */
801 dev->mode_config.funcs->fb_changed(dev);
802
803 /* FIXME: send hotplug event */
804 return true;
805}
806/**
807 * drm_initial_config - setup a sane initial connector configuration
808 * @dev: DRM device
809 * @can_grow: this configuration is growable
810 *
811 * LOCKING:
812 * Called at init time, must take mode config lock.
813 *
814 * Scan the CRTCs and connectors and try to put together an initial setup.
815 * At the moment, this is a cloned configuration across all heads with
816 * a new framebuffer object as the backing store.
817 *
818 * RETURNS:
819 * Zero if everything went ok, nonzero otherwise.
820 */
821bool drm_helper_initial_config(struct drm_device *dev, bool can_grow)
822{
Jesse Barnes40a518d2009-01-12 12:05:32 -0800823 struct drm_connector *connector;
824 int count = 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800825
Jesse Barnes40a518d2009-01-12 12:05:32 -0800826 count = drm_helper_probe_connector_modes(dev,
827 dev->mode_config.max_width,
828 dev->mode_config.max_height);
829
830 /*
831 * None of the available connectors had any modes, so add some
832 * and try to light them up anyway
833 */
834 if (!count) {
835 DRM_ERROR("connectors have no modes, using standard modes\n");
836 list_for_each_entry(connector,
837 &dev->mode_config.connector_list,
838 head)
839 drm_helper_add_std_modes(dev, connector);
840 }
841
842 drm_setup_crtcs(dev);
843
844 /* alert the driver fb layer */
845 dev->mode_config.funcs->fb_changed(dev);
846
847 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800848}
849EXPORT_SYMBOL(drm_helper_initial_config);
850
851/**
852 * drm_hotplug_stage_two
853 * @dev DRM device
854 * @connector hotpluged connector
855 *
856 * LOCKING.
857 * Caller must hold mode config lock, function might grab struct lock.
858 *
859 * Stage two of a hotplug.
860 *
861 * RETURNS:
862 * Zero on success, errno on failure.
863 */
864int drm_helper_hotplug_stage_two(struct drm_device *dev)
865{
Dave Airlief453ba02008-11-07 14:05:41 -0800866 drm_helper_plugged_event(dev);
867
868 return 0;
869}
870EXPORT_SYMBOL(drm_helper_hotplug_stage_two);
871
872int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
873 struct drm_mode_fb_cmd *mode_cmd)
874{
875 fb->width = mode_cmd->width;
876 fb->height = mode_cmd->height;
877 fb->pitch = mode_cmd->pitch;
878 fb->bits_per_pixel = mode_cmd->bpp;
879 fb->depth = mode_cmd->depth;
880
881 return 0;
882}
883EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
884
885int drm_helper_resume_force_mode(struct drm_device *dev)
886{
887 struct drm_crtc *crtc;
888 int ret;
889
890 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
891
892 if (!crtc->enabled)
893 continue;
894
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500895 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
896 crtc->x, crtc->y, crtc->fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800897
898 if (ret == false)
899 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
900 }
901 return 0;
902}
903EXPORT_SYMBOL(drm_helper_resume_force_mode);