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f453ba04 DA |
1 | /* |
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 | /* | |
aa91c666 | 37 | * Detailed mode info for 800x600@60Hz |
f453ba04 DA |
38 | */ |
39 | static struct drm_display_mode std_mode[] = { | |
aa91c666 DA |
40 | { 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) }, | |
f453ba04 DA |
43 | }; |
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 | |
63 | */ | |
64 | void drm_helper_probe_single_connector_modes(struct drm_connector *connector, | |
65 | uint32_t maxX, uint32_t maxY) | |
66 | { | |
67 | struct drm_device *dev = connector->dev; | |
68 | struct drm_display_mode *mode, *t; | |
69 | struct drm_connector_helper_funcs *connector_funcs = | |
70 | connector->helper_private; | |
71 | int ret; | |
72 | ||
73 | DRM_DEBUG("%s\n", drm_get_connector_name(connector)); | |
74 | /* set all modes to the unverified state */ | |
75 | list_for_each_entry_safe(mode, t, &connector->modes, head) | |
76 | mode->status = MODE_UNVERIFIED; | |
77 | ||
78 | connector->status = connector->funcs->detect(connector); | |
79 | ||
80 | if (connector->status == connector_status_disconnected) { | |
81 | DRM_DEBUG("%s is disconnected\n", | |
82 | drm_get_connector_name(connector)); | |
83 | /* TODO set EDID to NULL */ | |
84 | return; | |
85 | } | |
86 | ||
87 | ret = (*connector_funcs->get_modes)(connector); | |
88 | ||
89 | if (ret) { | |
90 | drm_mode_connector_list_update(connector); | |
91 | } | |
92 | ||
93 | if (maxX && maxY) | |
94 | drm_mode_validate_size(dev, &connector->modes, maxX, | |
95 | maxY, 0); | |
96 | list_for_each_entry_safe(mode, t, &connector->modes, head) { | |
97 | if (mode->status == MODE_OK) | |
98 | mode->status = connector_funcs->mode_valid(connector, | |
99 | mode); | |
100 | } | |
101 | ||
102 | ||
103 | drm_mode_prune_invalid(dev, &connector->modes, true); | |
104 | ||
105 | if (list_empty(&connector->modes)) { | |
106 | struct drm_display_mode *stdmode; | |
107 | ||
108 | DRM_DEBUG("No valid modes on %s\n", | |
109 | drm_get_connector_name(connector)); | |
110 | ||
111 | /* Should we do this here ??? | |
112 | * When no valid EDID modes are available we end up | |
113 | * here and bailed in the past, now we add a standard | |
114 | * 640x480@60Hz mode and carry on. | |
115 | */ | |
116 | stdmode = drm_mode_duplicate(dev, &std_mode[0]); | |
117 | drm_mode_probed_add(connector, stdmode); | |
118 | drm_mode_list_concat(&connector->probed_modes, | |
119 | &connector->modes); | |
120 | ||
121 | DRM_DEBUG("Adding standard 640x480 @ 60Hz to %s\n", | |
122 | drm_get_connector_name(connector)); | |
123 | } | |
124 | ||
125 | drm_mode_sort(&connector->modes); | |
126 | ||
127 | DRM_DEBUG("Probed modes for %s\n", drm_get_connector_name(connector)); | |
128 | list_for_each_entry_safe(mode, t, &connector->modes, head) { | |
129 | mode->vrefresh = drm_mode_vrefresh(mode); | |
130 | ||
131 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); | |
132 | drm_mode_debug_printmodeline(mode); | |
133 | } | |
134 | } | |
135 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); | |
136 | ||
137 | void drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX, | |
138 | uint32_t maxY) | |
139 | { | |
140 | struct drm_connector *connector; | |
141 | ||
142 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
143 | drm_helper_probe_single_connector_modes(connector, maxX, maxY); | |
144 | } | |
145 | } | |
146 | EXPORT_SYMBOL(drm_helper_probe_connector_modes); | |
147 | ||
148 | ||
149 | /** | |
150 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
151 | * @crtc: CRTC to check | |
152 | * | |
153 | * LOCKING: | |
154 | * Caller must hold mode config lock. | |
155 | * | |
156 | * Walk @crtc's DRM device's mode_config and see if it's in use. | |
157 | * | |
158 | * RETURNS: | |
159 | * True if @crtc is part of the mode_config, false otherwise. | |
160 | */ | |
161 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
162 | { | |
163 | struct drm_encoder *encoder; | |
164 | struct drm_device *dev = crtc->dev; | |
165 | /* FIXME: Locking around list access? */ | |
166 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) | |
167 | if (encoder->crtc == crtc) | |
168 | return true; | |
169 | return false; | |
170 | } | |
171 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
172 | ||
173 | /** | |
174 | * drm_disable_unused_functions - disable unused objects | |
175 | * @dev: DRM device | |
176 | * | |
177 | * LOCKING: | |
178 | * Caller must hold mode config lock. | |
179 | * | |
180 | * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled | |
181 | * by calling its dpms function, which should power it off. | |
182 | */ | |
183 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
184 | { | |
185 | struct drm_encoder *encoder; | |
186 | struct drm_encoder_helper_funcs *encoder_funcs; | |
187 | struct drm_crtc *crtc; | |
188 | ||
189 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
190 | encoder_funcs = encoder->helper_private; | |
191 | if (!encoder->crtc) | |
192 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
193 | } | |
194 | ||
195 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
196 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
197 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
198 | if (!crtc->enabled) { | |
199 | crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
200 | crtc->fb = NULL; | |
201 | } | |
202 | } | |
203 | } | |
204 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); | |
205 | ||
206 | static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height) | |
207 | { | |
208 | struct drm_display_mode *mode; | |
209 | ||
210 | list_for_each_entry(mode, &connector->modes, head) { | |
211 | if (drm_mode_width(mode) > width || | |
212 | drm_mode_height(mode) > height) | |
213 | continue; | |
214 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
215 | return mode; | |
216 | } | |
217 | return NULL; | |
218 | } | |
219 | ||
220 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
221 | { | |
222 | bool enable; | |
223 | ||
224 | if (strict) { | |
225 | enable = connector->status == connector_status_connected; | |
226 | } else { | |
227 | enable = connector->status != connector_status_disconnected; | |
228 | } | |
229 | return enable; | |
230 | } | |
231 | ||
232 | static void drm_enable_connectors(struct drm_device *dev, bool *enabled) | |
233 | { | |
234 | bool any_enabled = false; | |
235 | struct drm_connector *connector; | |
236 | int i = 0; | |
237 | ||
238 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
239 | enabled[i] = drm_connector_enabled(connector, true); | |
240 | any_enabled |= enabled[i]; | |
241 | i++; | |
242 | } | |
243 | ||
244 | if (any_enabled) | |
245 | return; | |
246 | ||
247 | i = 0; | |
248 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
249 | enabled[i] = drm_connector_enabled(connector, false); | |
250 | i++; | |
251 | } | |
252 | } | |
253 | ||
254 | static bool drm_target_preferred(struct drm_device *dev, | |
255 | struct drm_display_mode **modes, | |
256 | bool *enabled, int width, int height) | |
257 | { | |
258 | struct drm_connector *connector; | |
259 | int i = 0; | |
260 | ||
261 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
262 | ||
263 | if (enabled[i] == false) { | |
264 | i++; | |
265 | continue; | |
266 | } | |
267 | ||
268 | modes[i] = drm_has_preferred_mode(connector, width, height); | |
269 | if (!modes[i]) { | |
270 | list_for_each_entry(modes[i], &connector->modes, head) | |
271 | break; | |
272 | } | |
273 | i++; | |
274 | } | |
275 | return true; | |
276 | } | |
277 | ||
278 | static int drm_pick_crtcs(struct drm_device *dev, | |
279 | struct drm_crtc **best_crtcs, | |
280 | struct drm_display_mode **modes, | |
281 | int n, int width, int height) | |
282 | { | |
283 | int c, o; | |
284 | struct drm_connector *connector; | |
285 | struct drm_connector_helper_funcs *connector_funcs; | |
286 | struct drm_encoder *encoder; | |
287 | struct drm_crtc *best_crtc; | |
288 | int my_score, best_score, score; | |
289 | struct drm_crtc **crtcs, *crtc; | |
290 | ||
291 | if (n == dev->mode_config.num_connector) | |
292 | return 0; | |
293 | c = 0; | |
294 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
295 | if (c == n) | |
296 | break; | |
297 | c++; | |
298 | } | |
299 | ||
300 | best_crtcs[n] = NULL; | |
301 | best_crtc = NULL; | |
302 | best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height); | |
303 | if (modes[n] == NULL) | |
304 | return best_score; | |
305 | ||
306 | crtcs = kmalloc(dev->mode_config.num_connector * | |
307 | sizeof(struct drm_crtc *), GFP_KERNEL); | |
308 | if (!crtcs) | |
309 | return best_score; | |
310 | ||
311 | my_score = 1; | |
312 | if (connector->status == connector_status_connected) | |
313 | my_score++; | |
314 | if (drm_has_preferred_mode(connector, width, height)) | |
315 | my_score++; | |
316 | ||
317 | connector_funcs = connector->helper_private; | |
318 | encoder = connector_funcs->best_encoder(connector); | |
319 | if (!encoder) | |
320 | goto out; | |
321 | ||
322 | connector->encoder = encoder; | |
323 | ||
324 | /* select a crtc for this connector and then attempt to configure | |
325 | remaining connectors */ | |
326 | c = 0; | |
327 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
328 | ||
329 | if ((connector->encoder->possible_crtcs & (1 << c)) == 0) { | |
330 | c++; | |
331 | continue; | |
332 | } | |
333 | ||
334 | for (o = 0; o < n; o++) | |
335 | if (best_crtcs[o] == crtc) | |
336 | break; | |
337 | ||
338 | if (o < n) { | |
339 | /* ignore cloning for now */ | |
340 | c++; | |
341 | continue; | |
342 | } | |
343 | ||
344 | crtcs[n] = crtc; | |
345 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *)); | |
346 | score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1, | |
347 | width, height); | |
348 | if (score > best_score) { | |
349 | best_crtc = crtc; | |
350 | best_score = score; | |
351 | memcpy(best_crtcs, crtcs, | |
352 | dev->mode_config.num_connector * | |
353 | sizeof(struct drm_crtc *)); | |
354 | } | |
355 | c++; | |
356 | } | |
357 | out: | |
358 | kfree(crtcs); | |
359 | return best_score; | |
360 | } | |
361 | ||
362 | static void drm_setup_crtcs(struct drm_device *dev) | |
363 | { | |
364 | struct drm_crtc **crtcs; | |
365 | struct drm_display_mode **modes; | |
366 | struct drm_encoder *encoder; | |
367 | struct drm_connector *connector; | |
368 | bool *enabled; | |
369 | int width, height; | |
370 | int i, ret; | |
371 | ||
372 | width = dev->mode_config.max_width; | |
373 | height = dev->mode_config.max_height; | |
374 | ||
375 | /* clean out all the encoder/crtc combos */ | |
376 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
377 | encoder->crtc = NULL; | |
378 | } | |
379 | ||
380 | crtcs = kcalloc(dev->mode_config.num_connector, | |
381 | sizeof(struct drm_crtc *), GFP_KERNEL); | |
382 | modes = kcalloc(dev->mode_config.num_connector, | |
383 | sizeof(struct drm_display_mode *), GFP_KERNEL); | |
384 | enabled = kcalloc(dev->mode_config.num_connector, | |
385 | sizeof(bool), GFP_KERNEL); | |
386 | ||
387 | drm_enable_connectors(dev, enabled); | |
388 | ||
389 | ret = drm_target_preferred(dev, modes, enabled, width, height); | |
390 | if (!ret) | |
391 | DRM_ERROR("Unable to find initial modes\n"); | |
392 | ||
393 | drm_pick_crtcs(dev, crtcs, modes, 0, width, height); | |
394 | ||
395 | i = 0; | |
396 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
397 | struct drm_display_mode *mode = modes[i]; | |
398 | struct drm_crtc *crtc = crtcs[i]; | |
399 | ||
400 | if (connector->encoder == NULL) { | |
401 | i++; | |
402 | continue; | |
403 | } | |
404 | ||
405 | if (mode && crtc) { | |
406 | crtc->desired_mode = mode; | |
407 | connector->encoder->crtc = crtc; | |
408 | } else | |
409 | connector->encoder->crtc = NULL; | |
410 | i++; | |
411 | } | |
412 | ||
413 | kfree(crtcs); | |
414 | kfree(modes); | |
415 | kfree(enabled); | |
416 | } | |
417 | /** | |
418 | * drm_crtc_set_mode - set a mode | |
419 | * @crtc: CRTC to program | |
420 | * @mode: mode to use | |
421 | * @x: width of mode | |
422 | * @y: height of mode | |
423 | * | |
424 | * LOCKING: | |
425 | * Caller must hold mode config lock. | |
426 | * | |
427 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance | |
428 | * to fixup or reject the mode prior to trying to set it. | |
429 | * | |
430 | * RETURNS: | |
431 | * True if the mode was set successfully, or false otherwise. | |
432 | */ | |
433 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
434 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
435 | int x, int y, |
436 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
437 | { |
438 | struct drm_device *dev = crtc->dev; | |
439 | struct drm_display_mode *adjusted_mode, saved_mode; | |
440 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
441 | struct drm_encoder_helper_funcs *encoder_funcs; | |
442 | int saved_x, saved_y; | |
443 | struct drm_encoder *encoder; | |
444 | bool ret = true; | |
445 | ||
446 | adjusted_mode = drm_mode_duplicate(dev, mode); | |
447 | ||
448 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
449 | ||
450 | if (!crtc->enabled) | |
451 | return true; | |
452 | ||
453 | saved_mode = crtc->mode; | |
454 | saved_x = crtc->x; | |
455 | saved_y = crtc->y; | |
456 | ||
457 | /* Update crtc values up front so the driver can rely on them for mode | |
458 | * setting. | |
459 | */ | |
460 | crtc->mode = *mode; | |
461 | crtc->x = x; | |
462 | crtc->y = y; | |
463 | ||
464 | if (drm_mode_equal(&saved_mode, &crtc->mode)) { | |
465 | if (saved_x != crtc->x || saved_y != crtc->y) { | |
3c4fdcfb KH |
466 | crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y, |
467 | old_fb); | |
f453ba04 DA |
468 | goto done; |
469 | } | |
470 | } | |
471 | ||
472 | /* Pass our mode to the connectors and the CRTC to give them a chance to | |
473 | * adjust it according to limitations or connector properties, and also | |
474 | * a chance to reject the mode entirely. | |
475 | */ | |
476 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
477 | ||
478 | if (encoder->crtc != crtc) | |
479 | continue; | |
480 | encoder_funcs = encoder->helper_private; | |
481 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
482 | adjusted_mode))) { | |
483 | goto done; | |
484 | } | |
485 | } | |
486 | ||
487 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { | |
488 | goto done; | |
489 | } | |
490 | ||
491 | /* Prepare the encoders and CRTCs before setting the mode. */ | |
492 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
493 | ||
494 | if (encoder->crtc != crtc) | |
495 | continue; | |
496 | encoder_funcs = encoder->helper_private; | |
497 | /* Disable the encoders as the first thing we do. */ | |
498 | encoder_funcs->prepare(encoder); | |
499 | } | |
500 | ||
501 | crtc_funcs->prepare(crtc); | |
502 | ||
503 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
504 | * on the DPLL. | |
505 | */ | |
3c4fdcfb | 506 | crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
f453ba04 DA |
507 | |
508 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
509 | ||
510 | if (encoder->crtc != crtc) | |
511 | continue; | |
512 | ||
513 | DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder), | |
514 | mode->name, mode->base.id); | |
515 | encoder_funcs = encoder->helper_private; | |
516 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
517 | } | |
518 | ||
519 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
520 | crtc_funcs->commit(crtc); | |
521 | ||
522 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
523 | ||
524 | if (encoder->crtc != crtc) | |
525 | continue; | |
526 | ||
527 | encoder_funcs = encoder->helper_private; | |
528 | encoder_funcs->commit(encoder); | |
529 | ||
530 | } | |
531 | ||
532 | /* XXX free adjustedmode */ | |
533 | drm_mode_destroy(dev, adjusted_mode); | |
534 | /* FIXME: add subpixel order */ | |
535 | done: | |
536 | if (!ret) { | |
537 | crtc->mode = saved_mode; | |
538 | crtc->x = saved_x; | |
539 | crtc->y = saved_y; | |
540 | } | |
541 | ||
542 | return ret; | |
543 | } | |
544 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
545 | ||
546 | ||
547 | /** | |
548 | * drm_crtc_helper_set_config - set a new config from userspace | |
549 | * @crtc: CRTC to setup | |
550 | * @crtc_info: user provided configuration | |
551 | * @new_mode: new mode to set | |
552 | * @connector_set: set of connectors for the new config | |
553 | * @fb: new framebuffer | |
554 | * | |
555 | * LOCKING: | |
556 | * Caller must hold mode config lock. | |
557 | * | |
558 | * Setup a new configuration, provided by the user in @crtc_info, and enable | |
559 | * it. | |
560 | * | |
561 | * RETURNS: | |
562 | * Zero. (FIXME) | |
563 | */ | |
564 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
565 | { | |
566 | struct drm_device *dev; | |
567 | struct drm_crtc **save_crtcs, *new_crtc; | |
568 | struct drm_encoder **save_encoders, *new_encoder; | |
3c4fdcfb | 569 | struct drm_framebuffer *old_fb; |
f453ba04 DA |
570 | bool save_enabled; |
571 | bool changed = false; | |
572 | bool flip_or_move = false; | |
573 | struct drm_connector *connector; | |
574 | int count = 0, ro, fail = 0; | |
575 | struct drm_crtc_helper_funcs *crtc_funcs; | |
576 | int ret = 0; | |
577 | ||
578 | DRM_DEBUG("\n"); | |
579 | ||
580 | if (!set) | |
581 | return -EINVAL; | |
582 | ||
583 | if (!set->crtc) | |
584 | return -EINVAL; | |
585 | ||
586 | if (!set->crtc->helper_private) | |
587 | return -EINVAL; | |
588 | ||
589 | crtc_funcs = set->crtc->helper_private; | |
590 | ||
591 | DRM_DEBUG("crtc: %p %d fb: %p connectors: %p num_connectors: %d (x, y) (%i, %i)\n", | |
592 | set->crtc, set->crtc->base.id, set->fb, set->connectors, | |
593 | (int)set->num_connectors, set->x, set->y); | |
594 | ||
595 | dev = set->crtc->dev; | |
596 | ||
597 | /* save previous config */ | |
598 | save_enabled = set->crtc->enabled; | |
599 | ||
600 | /* this is meant to be num_connector not num_crtc */ | |
601 | save_crtcs = kzalloc(dev->mode_config.num_connector * | |
602 | sizeof(struct drm_crtc *), GFP_KERNEL); | |
603 | if (!save_crtcs) | |
604 | return -ENOMEM; | |
605 | ||
606 | save_encoders = kzalloc(dev->mode_config.num_connector * | |
607 | sizeof(struct drm_encoders *), GFP_KERNEL); | |
608 | if (!save_encoders) { | |
609 | kfree(save_crtcs); | |
610 | return -ENOMEM; | |
611 | } | |
612 | ||
613 | /* We should be able to check here if the fb has the same properties | |
614 | * and then just flip_or_move it */ | |
615 | if (set->crtc->fb != set->fb) { | |
616 | /* if we have no fb then its a change not a flip */ | |
617 | if (set->crtc->fb == NULL) | |
618 | changed = true; | |
619 | else | |
620 | flip_or_move = true; | |
621 | } | |
622 | ||
623 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
624 | flip_or_move = true; | |
625 | ||
626 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { | |
627 | DRM_DEBUG("modes are different\n"); | |
628 | drm_mode_debug_printmodeline(&set->crtc->mode); | |
629 | drm_mode_debug_printmodeline(set->mode); | |
630 | changed = true; | |
631 | } | |
632 | ||
633 | /* a) traverse passed in connector list and get encoders for them */ | |
634 | count = 0; | |
635 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
636 | struct drm_connector_helper_funcs *connector_funcs = | |
637 | connector->helper_private; | |
638 | save_encoders[count++] = connector->encoder; | |
639 | new_encoder = connector->encoder; | |
640 | for (ro = 0; ro < set->num_connectors; ro++) { | |
641 | if (set->connectors[ro] == connector) { | |
642 | new_encoder = connector_funcs->best_encoder(connector); | |
643 | /* if we can't get an encoder for a connector | |
644 | we are setting now - then fail */ | |
645 | if (new_encoder == NULL) | |
646 | /* don't break so fail path works correct */ | |
647 | fail = 1; | |
648 | break; | |
649 | } | |
650 | } | |
651 | ||
652 | if (new_encoder != connector->encoder) { | |
653 | changed = true; | |
654 | connector->encoder = new_encoder; | |
655 | } | |
656 | } | |
657 | ||
658 | if (fail) { | |
659 | ret = -EINVAL; | |
660 | goto fail_no_encoder; | |
661 | } | |
662 | ||
663 | count = 0; | |
664 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
665 | if (!connector->encoder) | |
666 | continue; | |
667 | ||
668 | save_crtcs[count++] = connector->encoder->crtc; | |
669 | ||
670 | if (connector->encoder->crtc == set->crtc) | |
671 | new_crtc = NULL; | |
672 | else | |
673 | new_crtc = connector->encoder->crtc; | |
674 | ||
675 | for (ro = 0; ro < set->num_connectors; ro++) { | |
676 | if (set->connectors[ro] == connector) | |
677 | new_crtc = set->crtc; | |
678 | } | |
679 | if (new_crtc != connector->encoder->crtc) { | |
680 | changed = true; | |
681 | connector->encoder->crtc = new_crtc; | |
682 | } | |
683 | } | |
684 | ||
685 | /* mode_set_base is not a required function */ | |
686 | if (flip_or_move && !crtc_funcs->mode_set_base) | |
687 | changed = true; | |
688 | ||
689 | if (changed) { | |
3c4fdcfb | 690 | old_fb = set->crtc->fb; |
f453ba04 DA |
691 | set->crtc->fb = set->fb; |
692 | set->crtc->enabled = (set->mode != NULL); | |
693 | if (set->mode != NULL) { | |
694 | DRM_DEBUG("attempting to set mode from userspace\n"); | |
695 | drm_mode_debug_printmodeline(set->mode); | |
696 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, | |
3c4fdcfb KH |
697 | set->x, set->y, |
698 | old_fb)) { | |
f453ba04 DA |
699 | ret = -EINVAL; |
700 | goto fail_set_mode; | |
701 | } | |
702 | /* TODO are these needed? */ | |
703 | set->crtc->desired_x = set->x; | |
704 | set->crtc->desired_y = set->y; | |
705 | set->crtc->desired_mode = set->mode; | |
706 | } | |
707 | drm_helper_disable_unused_functions(dev); | |
708 | } else if (flip_or_move) { | |
3c4fdcfb | 709 | old_fb = set->crtc->fb; |
f453ba04 DA |
710 | if (set->crtc->fb != set->fb) |
711 | set->crtc->fb = set->fb; | |
3c4fdcfb | 712 | crtc_funcs->mode_set_base(set->crtc, set->x, set->y, old_fb); |
f453ba04 DA |
713 | } |
714 | ||
715 | kfree(save_encoders); | |
716 | kfree(save_crtcs); | |
717 | return 0; | |
718 | ||
719 | fail_set_mode: | |
720 | set->crtc->enabled = save_enabled; | |
721 | count = 0; | |
722 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
723 | connector->encoder->crtc = save_crtcs[count++]; | |
724 | fail_no_encoder: | |
725 | kfree(save_crtcs); | |
726 | count = 0; | |
727 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
728 | connector->encoder = save_encoders[count++]; | |
729 | } | |
730 | kfree(save_encoders); | |
731 | return ret; | |
732 | } | |
733 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
734 | ||
735 | bool drm_helper_plugged_event(struct drm_device *dev) | |
736 | { | |
737 | DRM_DEBUG("\n"); | |
738 | ||
739 | drm_helper_probe_connector_modes(dev, dev->mode_config.max_width, | |
740 | dev->mode_config.max_height); | |
741 | ||
742 | drm_setup_crtcs(dev); | |
743 | ||
744 | /* alert the driver fb layer */ | |
745 | dev->mode_config.funcs->fb_changed(dev); | |
746 | ||
747 | /* FIXME: send hotplug event */ | |
748 | return true; | |
749 | } | |
750 | /** | |
751 | * drm_initial_config - setup a sane initial connector configuration | |
752 | * @dev: DRM device | |
753 | * @can_grow: this configuration is growable | |
754 | * | |
755 | * LOCKING: | |
756 | * Called at init time, must take mode config lock. | |
757 | * | |
758 | * Scan the CRTCs and connectors and try to put together an initial setup. | |
759 | * At the moment, this is a cloned configuration across all heads with | |
760 | * a new framebuffer object as the backing store. | |
761 | * | |
762 | * RETURNS: | |
763 | * Zero if everything went ok, nonzero otherwise. | |
764 | */ | |
765 | bool drm_helper_initial_config(struct drm_device *dev, bool can_grow) | |
766 | { | |
767 | int ret = false; | |
768 | ||
769 | drm_helper_plugged_event(dev); | |
770 | return ret; | |
771 | } | |
772 | EXPORT_SYMBOL(drm_helper_initial_config); | |
773 | ||
774 | /** | |
775 | * drm_hotplug_stage_two | |
776 | * @dev DRM device | |
777 | * @connector hotpluged connector | |
778 | * | |
779 | * LOCKING. | |
780 | * Caller must hold mode config lock, function might grab struct lock. | |
781 | * | |
782 | * Stage two of a hotplug. | |
783 | * | |
784 | * RETURNS: | |
785 | * Zero on success, errno on failure. | |
786 | */ | |
787 | int drm_helper_hotplug_stage_two(struct drm_device *dev) | |
788 | { | |
f453ba04 DA |
789 | drm_helper_plugged_event(dev); |
790 | ||
791 | return 0; | |
792 | } | |
793 | EXPORT_SYMBOL(drm_helper_hotplug_stage_two); | |
794 | ||
795 | int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, | |
796 | struct drm_mode_fb_cmd *mode_cmd) | |
797 | { | |
798 | fb->width = mode_cmd->width; | |
799 | fb->height = mode_cmd->height; | |
800 | fb->pitch = mode_cmd->pitch; | |
801 | fb->bits_per_pixel = mode_cmd->bpp; | |
802 | fb->depth = mode_cmd->depth; | |
803 | ||
804 | return 0; | |
805 | } | |
806 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
807 | ||
808 | int drm_helper_resume_force_mode(struct drm_device *dev) | |
809 | { | |
810 | struct drm_crtc *crtc; | |
811 | int ret; | |
812 | ||
813 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
814 | ||
815 | if (!crtc->enabled) | |
816 | continue; | |
817 | ||
3c4fdcfb KH |
818 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
819 | crtc->x, crtc->y, crtc->fb); | |
f453ba04 DA |
820 | |
821 | if (ret == false) | |
822 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
823 | } | |
824 | return 0; | |
825 | } | |
826 | EXPORT_SYMBOL(drm_helper_resume_force_mode); |