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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 | 38 | */ |
40a518d9 | 39 | static struct drm_display_mode std_modes[] = { |
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 | |
40a518d9 JB |
63 | * |
64 | * RETURNS: | |
65 | * Number of modes found on @connector. | |
f453ba04 | 66 | */ |
40a518d9 JB |
67 | int drm_helper_probe_single_connector_modes(struct drm_connector *connector, |
68 | uint32_t maxX, uint32_t maxY) | |
f453ba04 DA |
69 | { |
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; | |
40a518d9 | 74 | int count = 0; |
f453ba04 DA |
75 | |
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 */ | |
40a518d9 | 87 | return 0; |
f453ba04 DA |
88 | } |
89 | ||
40a518d9 JB |
90 | count = (*connector_funcs->get_modes)(connector); |
91 | if (!count) | |
92 | return 0; | |
f453ba04 | 93 | |
40a518d9 | 94 | drm_mode_connector_list_update(connector); |
f453ba04 DA |
95 | |
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 | ||
40a518d9 JB |
108 | if (list_empty(&connector->modes)) |
109 | return 0; | |
f453ba04 DA |
110 | |
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 | } | |
40a518d9 JB |
120 | |
121 | return count; | |
f453ba04 DA |
122 | } |
123 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); | |
124 | ||
40a518d9 | 125 | int drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX, |
f453ba04 DA |
126 | uint32_t maxY) |
127 | { | |
128 | struct drm_connector *connector; | |
40a518d9 | 129 | int count = 0; |
f453ba04 DA |
130 | |
131 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
40a518d9 JB |
132 | count += drm_helper_probe_single_connector_modes(connector, |
133 | maxX, maxY); | |
f453ba04 | 134 | } |
40a518d9 JB |
135 | |
136 | return count; | |
f453ba04 DA |
137 | } |
138 | EXPORT_SYMBOL(drm_helper_probe_connector_modes); | |
139 | ||
40a518d9 JB |
140 | static 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 | } | |
f453ba04 DA |
172 | |
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 | */ | |
185 | bool 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 | } | |
195 | EXPORT_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 | */ | |
207 | void 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 | } | |
228 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); | |
229 | ||
230 | static 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 | ||
244 | static 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 | ||
256 | static 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); | |
40a518d9 JB |
264 | DRM_DEBUG("connector %d enabled? %s\n", connector->base.id, |
265 | enabled[i] ? "yes" : "no"); | |
f453ba04 DA |
266 | 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 | ||
280 | static 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 | ||
40a518d9 JB |
294 | DRM_DEBUG("looking for preferred mode on connector %d\n", |
295 | connector->base.id); | |
296 | ||
f453ba04 | 297 | modes[i] = drm_has_preferred_mode(connector, width, height); |
40a518d9 JB |
298 | /* No preferred modes, pick one off the list */ |
299 | if (!modes[i] && !list_empty(&connector->modes)) { | |
f453ba04 DA |
300 | list_for_each_entry(modes[i], &connector->modes, head) |
301 | break; | |
302 | } | |
40a518d9 JB |
303 | DRM_DEBUG("found mode %s\n", modes[i] ? modes[i]->name : |
304 | "none"); | |
f453ba04 DA |
305 | i++; |
306 | } | |
307 | return true; | |
308 | } | |
309 | ||
310 | static 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 | } | |
389 | out: | |
390 | kfree(crtcs); | |
391 | return best_score; | |
392 | } | |
393 | ||
394 | static 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 | ||
40a518d9 JB |
404 | DRM_DEBUG("\n"); |
405 | ||
f453ba04 DA |
406 | 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 | ||
40a518d9 JB |
427 | DRM_DEBUG("picking CRTCs for %dx%d config\n", width, height); |
428 | ||
f453ba04 DA |
429 | 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) { | |
40a518d9 JB |
442 | DRM_DEBUG("desired mode %s set on crtc %d\n", |
443 | mode->name, crtc->base.id); | |
f453ba04 DA |
444 | 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 | } | |
7bec756c JB |
455 | |
456 | /** | |
457 | * drm_encoder_crtc_ok - can a given crtc drive a given encoder? | |
458 | * @encoder: encoder to test | |
459 | * @crtc: crtc to test | |
460 | * | |
461 | * Return false if @encoder can't be driven by @crtc, true otherwise. | |
462 | */ | |
463 | static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, | |
464 | struct drm_crtc *crtc) | |
465 | { | |
466 | struct drm_device *dev; | |
467 | struct drm_crtc *tmp; | |
468 | int crtc_mask = 1; | |
469 | ||
470 | WARN(!crtc, "checking null crtc?"); | |
471 | ||
472 | dev = crtc->dev; | |
473 | ||
474 | list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { | |
475 | if (tmp == crtc) | |
476 | break; | |
477 | crtc_mask <<= 1; | |
478 | } | |
479 | ||
480 | if (encoder->possible_crtcs & crtc_mask) | |
481 | return true; | |
482 | return false; | |
483 | } | |
484 | ||
485 | /* | |
486 | * Check the CRTC we're going to map each output to vs. its current | |
487 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
488 | * since the driver will have to re-route things. | |
489 | */ | |
490 | static void | |
491 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
492 | { | |
493 | struct drm_encoder_helper_funcs *encoder_funcs; | |
494 | struct drm_encoder *encoder; | |
495 | ||
496 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
497 | encoder_funcs = encoder->helper_private; | |
498 | /* Disable unused encoders */ | |
499 | if (encoder->crtc == NULL) | |
500 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
501 | /* Disable encoders whose CRTC is about to change */ | |
502 | if (encoder_funcs->get_crtc && | |
503 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
504 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
505 | } | |
506 | } | |
507 | ||
f453ba04 DA |
508 | /** |
509 | * drm_crtc_set_mode - set a mode | |
510 | * @crtc: CRTC to program | |
511 | * @mode: mode to use | |
512 | * @x: width of mode | |
513 | * @y: height of mode | |
514 | * | |
515 | * LOCKING: | |
516 | * Caller must hold mode config lock. | |
517 | * | |
518 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance | |
519 | * to fixup or reject the mode prior to trying to set it. | |
520 | * | |
521 | * RETURNS: | |
522 | * True if the mode was set successfully, or false otherwise. | |
523 | */ | |
524 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
525 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
526 | int x, int y, |
527 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
528 | { |
529 | struct drm_device *dev = crtc->dev; | |
530 | struct drm_display_mode *adjusted_mode, saved_mode; | |
531 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
532 | struct drm_encoder_helper_funcs *encoder_funcs; | |
533 | int saved_x, saved_y; | |
534 | struct drm_encoder *encoder; | |
535 | bool ret = true; | |
712531bf | 536 | bool depth_changed, bpp_changed; |
f453ba04 DA |
537 | |
538 | adjusted_mode = drm_mode_duplicate(dev, mode); | |
539 | ||
540 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
541 | ||
542 | if (!crtc->enabled) | |
543 | return true; | |
544 | ||
712531bf JB |
545 | if (old_fb && crtc->fb) { |
546 | depth_changed = (old_fb->depth != crtc->fb->depth); | |
547 | bpp_changed = (old_fb->bits_per_pixel != | |
548 | crtc->fb->bits_per_pixel); | |
549 | } else { | |
550 | depth_changed = true; | |
551 | bpp_changed = true; | |
552 | } | |
553 | ||
f453ba04 DA |
554 | saved_mode = crtc->mode; |
555 | saved_x = crtc->x; | |
556 | saved_y = crtc->y; | |
557 | ||
558 | /* Update crtc values up front so the driver can rely on them for mode | |
559 | * setting. | |
560 | */ | |
561 | crtc->mode = *mode; | |
562 | crtc->x = x; | |
563 | crtc->y = y; | |
564 | ||
565 | if (drm_mode_equal(&saved_mode, &crtc->mode)) { | |
712531bf JB |
566 | if (saved_x != crtc->x || saved_y != crtc->y || |
567 | depth_changed || bpp_changed) { | |
5c3b82e2 CW |
568 | ret = !crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y, |
569 | old_fb); | |
f453ba04 DA |
570 | goto done; |
571 | } | |
572 | } | |
573 | ||
574 | /* Pass our mode to the connectors and the CRTC to give them a chance to | |
575 | * adjust it according to limitations or connector properties, and also | |
576 | * a chance to reject the mode entirely. | |
577 | */ | |
578 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
579 | ||
580 | if (encoder->crtc != crtc) | |
581 | continue; | |
582 | encoder_funcs = encoder->helper_private; | |
583 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
584 | adjusted_mode))) { | |
585 | goto done; | |
586 | } | |
587 | } | |
588 | ||
589 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { | |
590 | goto done; | |
591 | } | |
592 | ||
593 | /* Prepare the encoders and CRTCs before setting the mode. */ | |
594 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
595 | ||
596 | if (encoder->crtc != crtc) | |
597 | continue; | |
598 | encoder_funcs = encoder->helper_private; | |
599 | /* Disable the encoders as the first thing we do. */ | |
600 | encoder_funcs->prepare(encoder); | |
601 | } | |
602 | ||
7bec756c JB |
603 | drm_crtc_prepare_encoders(dev); |
604 | ||
f453ba04 DA |
605 | crtc_funcs->prepare(crtc); |
606 | ||
607 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
608 | * on the DPLL. | |
609 | */ | |
5c3b82e2 CW |
610 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
611 | if (!ret) | |
612 | goto done; | |
f453ba04 DA |
613 | |
614 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
615 | ||
616 | if (encoder->crtc != crtc) | |
617 | continue; | |
618 | ||
619 | DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder), | |
620 | mode->name, mode->base.id); | |
621 | encoder_funcs = encoder->helper_private; | |
622 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
623 | } | |
624 | ||
625 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
626 | crtc_funcs->commit(crtc); | |
627 | ||
628 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
629 | ||
630 | if (encoder->crtc != crtc) | |
631 | continue; | |
632 | ||
633 | encoder_funcs = encoder->helper_private; | |
634 | encoder_funcs->commit(encoder); | |
635 | ||
636 | } | |
637 | ||
638 | /* XXX free adjustedmode */ | |
639 | drm_mode_destroy(dev, adjusted_mode); | |
640 | /* FIXME: add subpixel order */ | |
641 | done: | |
642 | if (!ret) { | |
643 | crtc->mode = saved_mode; | |
644 | crtc->x = saved_x; | |
645 | crtc->y = saved_y; | |
646 | } | |
647 | ||
648 | return ret; | |
649 | } | |
650 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
651 | ||
652 | ||
653 | /** | |
654 | * drm_crtc_helper_set_config - set a new config from userspace | |
655 | * @crtc: CRTC to setup | |
656 | * @crtc_info: user provided configuration | |
657 | * @new_mode: new mode to set | |
658 | * @connector_set: set of connectors for the new config | |
659 | * @fb: new framebuffer | |
660 | * | |
661 | * LOCKING: | |
662 | * Caller must hold mode config lock. | |
663 | * | |
664 | * Setup a new configuration, provided by the user in @crtc_info, and enable | |
665 | * it. | |
666 | * | |
667 | * RETURNS: | |
668 | * Zero. (FIXME) | |
669 | */ | |
670 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
671 | { | |
672 | struct drm_device *dev; | |
673 | struct drm_crtc **save_crtcs, *new_crtc; | |
674 | struct drm_encoder **save_encoders, *new_encoder; | |
7bec756c | 675 | struct drm_framebuffer *old_fb = NULL; |
f453ba04 | 676 | bool save_enabled; |
712531bf JB |
677 | bool mode_changed = false; |
678 | bool fb_changed = false; | |
f453ba04 DA |
679 | struct drm_connector *connector; |
680 | int count = 0, ro, fail = 0; | |
681 | struct drm_crtc_helper_funcs *crtc_funcs; | |
682 | int ret = 0; | |
683 | ||
684 | DRM_DEBUG("\n"); | |
685 | ||
686 | if (!set) | |
687 | return -EINVAL; | |
688 | ||
689 | if (!set->crtc) | |
690 | return -EINVAL; | |
691 | ||
692 | if (!set->crtc->helper_private) | |
693 | return -EINVAL; | |
694 | ||
695 | crtc_funcs = set->crtc->helper_private; | |
696 | ||
697 | DRM_DEBUG("crtc: %p %d fb: %p connectors: %p num_connectors: %d (x, y) (%i, %i)\n", | |
698 | set->crtc, set->crtc->base.id, set->fb, set->connectors, | |
699 | (int)set->num_connectors, set->x, set->y); | |
700 | ||
701 | dev = set->crtc->dev; | |
702 | ||
703 | /* save previous config */ | |
704 | save_enabled = set->crtc->enabled; | |
705 | ||
712531bf JB |
706 | /* |
707 | * We do mode_config.num_connectors here since we'll look at the | |
708 | * CRTC and encoder associated with each connector later. | |
709 | */ | |
f453ba04 DA |
710 | save_crtcs = kzalloc(dev->mode_config.num_connector * |
711 | sizeof(struct drm_crtc *), GFP_KERNEL); | |
712 | if (!save_crtcs) | |
713 | return -ENOMEM; | |
714 | ||
715 | save_encoders = kzalloc(dev->mode_config.num_connector * | |
716 | sizeof(struct drm_encoders *), GFP_KERNEL); | |
717 | if (!save_encoders) { | |
718 | kfree(save_crtcs); | |
719 | return -ENOMEM; | |
720 | } | |
721 | ||
722 | /* We should be able to check here if the fb has the same properties | |
723 | * and then just flip_or_move it */ | |
724 | if (set->crtc->fb != set->fb) { | |
712531bf | 725 | /* If we have no fb then treat it as a full mode set */ |
7bec756c JB |
726 | if (set->crtc->fb == NULL) { |
727 | DRM_DEBUG("crtc has no fb, full mode set\n"); | |
712531bf | 728 | mode_changed = true; |
7bec756c | 729 | } else if ((set->fb->bits_per_pixel != |
712531bf JB |
730 | set->crtc->fb->bits_per_pixel) || |
731 | set->fb->depth != set->crtc->fb->depth) | |
732 | fb_changed = true; | |
f453ba04 | 733 | else |
712531bf | 734 | fb_changed = true; |
f453ba04 DA |
735 | } |
736 | ||
737 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 738 | fb_changed = true; |
f453ba04 DA |
739 | |
740 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { | |
7bec756c | 741 | DRM_DEBUG("modes are different, full mode set\n"); |
f453ba04 DA |
742 | drm_mode_debug_printmodeline(&set->crtc->mode); |
743 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 744 | mode_changed = true; |
f453ba04 DA |
745 | } |
746 | ||
747 | /* a) traverse passed in connector list and get encoders for them */ | |
748 | count = 0; | |
749 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
750 | struct drm_connector_helper_funcs *connector_funcs = | |
751 | connector->helper_private; | |
752 | save_encoders[count++] = connector->encoder; | |
753 | new_encoder = connector->encoder; | |
754 | for (ro = 0; ro < set->num_connectors; ro++) { | |
755 | if (set->connectors[ro] == connector) { | |
756 | new_encoder = connector_funcs->best_encoder(connector); | |
757 | /* if we can't get an encoder for a connector | |
758 | we are setting now - then fail */ | |
759 | if (new_encoder == NULL) | |
760 | /* don't break so fail path works correct */ | |
761 | fail = 1; | |
762 | break; | |
763 | } | |
764 | } | |
765 | ||
766 | if (new_encoder != connector->encoder) { | |
7bec756c | 767 | DRM_DEBUG("encoder changed, full mode switch\n"); |
712531bf | 768 | mode_changed = true; |
f453ba04 DA |
769 | connector->encoder = new_encoder; |
770 | } | |
771 | } | |
772 | ||
773 | if (fail) { | |
774 | ret = -EINVAL; | |
775 | goto fail_no_encoder; | |
776 | } | |
777 | ||
778 | count = 0; | |
779 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
780 | if (!connector->encoder) | |
781 | continue; | |
782 | ||
783 | save_crtcs[count++] = connector->encoder->crtc; | |
784 | ||
785 | if (connector->encoder->crtc == set->crtc) | |
786 | new_crtc = NULL; | |
787 | else | |
788 | new_crtc = connector->encoder->crtc; | |
789 | ||
790 | for (ro = 0; ro < set->num_connectors; ro++) { | |
791 | if (set->connectors[ro] == connector) | |
792 | new_crtc = set->crtc; | |
793 | } | |
7bec756c JB |
794 | |
795 | /* Make sure the new CRTC will work with the encoder */ | |
796 | if (new_crtc && | |
797 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
798 | ret = -EINVAL; | |
799 | goto fail_set_mode; | |
800 | } | |
f453ba04 | 801 | if (new_crtc != connector->encoder->crtc) { |
7bec756c | 802 | DRM_DEBUG("crtc changed, full mode switch\n"); |
712531bf | 803 | mode_changed = true; |
f453ba04 DA |
804 | connector->encoder->crtc = new_crtc; |
805 | } | |
7bec756c JB |
806 | DRM_DEBUG("setting connector %d crtc to %p\n", |
807 | connector->base.id, new_crtc); | |
f453ba04 DA |
808 | } |
809 | ||
810 | /* mode_set_base is not a required function */ | |
712531bf JB |
811 | if (fb_changed && !crtc_funcs->mode_set_base) |
812 | mode_changed = true; | |
f453ba04 | 813 | |
712531bf | 814 | if (mode_changed) { |
3c4fdcfb | 815 | old_fb = set->crtc->fb; |
f453ba04 DA |
816 | set->crtc->fb = set->fb; |
817 | set->crtc->enabled = (set->mode != NULL); | |
818 | if (set->mode != NULL) { | |
819 | DRM_DEBUG("attempting to set mode from userspace\n"); | |
820 | drm_mode_debug_printmodeline(set->mode); | |
821 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, | |
3c4fdcfb KH |
822 | set->x, set->y, |
823 | old_fb)) { | |
5c3b82e2 CW |
824 | DRM_ERROR("failed to set mode on crtc %p\n", |
825 | set->crtc); | |
f453ba04 DA |
826 | ret = -EINVAL; |
827 | goto fail_set_mode; | |
828 | } | |
829 | /* TODO are these needed? */ | |
830 | set->crtc->desired_x = set->x; | |
831 | set->crtc->desired_y = set->y; | |
832 | set->crtc->desired_mode = set->mode; | |
833 | } | |
834 | drm_helper_disable_unused_functions(dev); | |
712531bf | 835 | } else if (fb_changed) { |
3c4fdcfb | 836 | old_fb = set->crtc->fb; |
f453ba04 DA |
837 | if (set->crtc->fb != set->fb) |
838 | set->crtc->fb = set->fb; | |
5c3b82e2 CW |
839 | ret = crtc_funcs->mode_set_base(set->crtc, |
840 | set->x, set->y, old_fb); | |
841 | if (ret != 0) | |
842 | goto fail_set_mode; | |
f453ba04 DA |
843 | } |
844 | ||
845 | kfree(save_encoders); | |
846 | kfree(save_crtcs); | |
847 | return 0; | |
848 | ||
849 | fail_set_mode: | |
850 | set->crtc->enabled = save_enabled; | |
7bec756c | 851 | set->crtc->fb = old_fb; |
f453ba04 | 852 | count = 0; |
e62fb64e CW |
853 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
854 | if (!connector->encoder) | |
855 | continue; | |
856 | ||
f453ba04 | 857 | connector->encoder->crtc = save_crtcs[count++]; |
e62fb64e | 858 | } |
f453ba04 DA |
859 | fail_no_encoder: |
860 | kfree(save_crtcs); | |
861 | count = 0; | |
862 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
863 | connector->encoder = save_encoders[count++]; | |
864 | } | |
865 | kfree(save_encoders); | |
866 | return ret; | |
867 | } | |
868 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
869 | ||
870 | bool drm_helper_plugged_event(struct drm_device *dev) | |
871 | { | |
872 | DRM_DEBUG("\n"); | |
873 | ||
874 | drm_helper_probe_connector_modes(dev, dev->mode_config.max_width, | |
875 | dev->mode_config.max_height); | |
876 | ||
877 | drm_setup_crtcs(dev); | |
878 | ||
879 | /* alert the driver fb layer */ | |
880 | dev->mode_config.funcs->fb_changed(dev); | |
881 | ||
882 | /* FIXME: send hotplug event */ | |
883 | return true; | |
884 | } | |
885 | /** | |
886 | * drm_initial_config - setup a sane initial connector configuration | |
887 | * @dev: DRM device | |
888 | * @can_grow: this configuration is growable | |
889 | * | |
890 | * LOCKING: | |
891 | * Called at init time, must take mode config lock. | |
892 | * | |
893 | * Scan the CRTCs and connectors and try to put together an initial setup. | |
894 | * At the moment, this is a cloned configuration across all heads with | |
895 | * a new framebuffer object as the backing store. | |
896 | * | |
897 | * RETURNS: | |
898 | * Zero if everything went ok, nonzero otherwise. | |
899 | */ | |
900 | bool drm_helper_initial_config(struct drm_device *dev, bool can_grow) | |
901 | { | |
40a518d9 JB |
902 | struct drm_connector *connector; |
903 | int count = 0; | |
f453ba04 | 904 | |
40a518d9 JB |
905 | count = drm_helper_probe_connector_modes(dev, |
906 | dev->mode_config.max_width, | |
907 | dev->mode_config.max_height); | |
908 | ||
909 | /* | |
910 | * None of the available connectors had any modes, so add some | |
911 | * and try to light them up anyway | |
912 | */ | |
913 | if (!count) { | |
914 | DRM_ERROR("connectors have no modes, using standard modes\n"); | |
915 | list_for_each_entry(connector, | |
916 | &dev->mode_config.connector_list, | |
917 | head) | |
918 | drm_helper_add_std_modes(dev, connector); | |
919 | } | |
920 | ||
921 | drm_setup_crtcs(dev); | |
922 | ||
923 | /* alert the driver fb layer */ | |
924 | dev->mode_config.funcs->fb_changed(dev); | |
925 | ||
926 | return 0; | |
f453ba04 DA |
927 | } |
928 | EXPORT_SYMBOL(drm_helper_initial_config); | |
929 | ||
930 | /** | |
931 | * drm_hotplug_stage_two | |
932 | * @dev DRM device | |
933 | * @connector hotpluged connector | |
934 | * | |
935 | * LOCKING. | |
936 | * Caller must hold mode config lock, function might grab struct lock. | |
937 | * | |
938 | * Stage two of a hotplug. | |
939 | * | |
940 | * RETURNS: | |
941 | * Zero on success, errno on failure. | |
942 | */ | |
943 | int drm_helper_hotplug_stage_two(struct drm_device *dev) | |
944 | { | |
f453ba04 DA |
945 | drm_helper_plugged_event(dev); |
946 | ||
947 | return 0; | |
948 | } | |
949 | EXPORT_SYMBOL(drm_helper_hotplug_stage_two); | |
950 | ||
951 | int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, | |
952 | struct drm_mode_fb_cmd *mode_cmd) | |
953 | { | |
954 | fb->width = mode_cmd->width; | |
955 | fb->height = mode_cmd->height; | |
956 | fb->pitch = mode_cmd->pitch; | |
957 | fb->bits_per_pixel = mode_cmd->bpp; | |
958 | fb->depth = mode_cmd->depth; | |
959 | ||
960 | return 0; | |
961 | } | |
962 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
963 | ||
964 | int drm_helper_resume_force_mode(struct drm_device *dev) | |
965 | { | |
966 | struct drm_crtc *crtc; | |
967 | int ret; | |
968 | ||
969 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
970 | ||
971 | if (!crtc->enabled) | |
972 | continue; | |
973 | ||
3c4fdcfb KH |
974 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
975 | crtc->x, crtc->y, crtc->fb); | |
f453ba04 DA |
976 | |
977 | if (ret == false) | |
978 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
979 | } | |
980 | return 0; | |
981 | } | |
982 | EXPORT_SYMBOL(drm_helper_resume_force_mode); |