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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" | |
d50ba256 | 35 | #include "drm_fb_helper.h" |
f453ba04 | 36 | |
6714977b | 37 | static void drm_mode_validate_flag(struct drm_connector *connector, |
38 | int flags) | |
39 | { | |
40 | struct drm_display_mode *mode, *t; | |
41 | ||
42 | if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) | |
43 | return; | |
44 | ||
45 | list_for_each_entry_safe(mode, t, &connector->modes, head) { | |
46 | if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && | |
47 | !(flags & DRM_MODE_FLAG_INTERLACE)) | |
48 | mode->status = MODE_NO_INTERLACE; | |
49 | if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && | |
50 | !(flags & DRM_MODE_FLAG_DBLSCAN)) | |
51 | mode->status = MODE_NO_DBLESCAN; | |
52 | } | |
53 | ||
54 | return; | |
55 | } | |
56 | ||
f453ba04 | 57 | /** |
38651674 | 58 | * drm_helper_probe_single_connector_modes - get complete set of display modes |
f453ba04 DA |
59 | * @dev: DRM device |
60 | * @maxX: max width for modes | |
61 | * @maxY: max height for modes | |
62 | * | |
63 | * LOCKING: | |
64 | * Caller must hold mode config lock. | |
65 | * | |
66 | * Based on @dev's mode_config layout, scan all the connectors and try to detect | |
67 | * modes on them. Modes will first be added to the connector's probed_modes | |
68 | * list, then culled (based on validity and the @maxX, @maxY parameters) and | |
69 | * put into the normal modes list. | |
70 | * | |
71 | * Intended to be used either at bootup time or when major configuration | |
72 | * changes have occurred. | |
73 | * | |
74 | * FIXME: take into account monitor limits | |
40a518d9 JB |
75 | * |
76 | * RETURNS: | |
77 | * Number of modes found on @connector. | |
f453ba04 | 78 | */ |
40a518d9 JB |
79 | int drm_helper_probe_single_connector_modes(struct drm_connector *connector, |
80 | uint32_t maxX, uint32_t maxY) | |
f453ba04 DA |
81 | { |
82 | struct drm_device *dev = connector->dev; | |
83 | struct drm_display_mode *mode, *t; | |
84 | struct drm_connector_helper_funcs *connector_funcs = | |
85 | connector->helper_private; | |
40a518d9 | 86 | int count = 0; |
6714977b | 87 | int mode_flags = 0; |
f453ba04 | 88 | |
9440106b JG |
89 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, |
90 | drm_get_connector_name(connector)); | |
f453ba04 DA |
91 | /* set all modes to the unverified state */ |
92 | list_for_each_entry_safe(mode, t, &connector->modes, head) | |
93 | mode->status = MODE_UNVERIFIED; | |
94 | ||
d50ba256 DA |
95 | if (connector->force) { |
96 | if (connector->force == DRM_FORCE_ON) | |
97 | connector->status = connector_status_connected; | |
98 | else | |
99 | connector->status = connector_status_disconnected; | |
100 | if (connector->funcs->force) | |
101 | connector->funcs->force(connector); | |
102 | } else | |
103 | connector->status = connector->funcs->detect(connector); | |
f453ba04 DA |
104 | |
105 | if (connector->status == connector_status_disconnected) { | |
9440106b JG |
106 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", |
107 | connector->base.id, drm_get_connector_name(connector)); | |
72539832 | 108 | drm_mode_connector_update_edid_property(connector, NULL); |
620f3781 | 109 | goto prune; |
f453ba04 DA |
110 | } |
111 | ||
40a518d9 | 112 | count = (*connector_funcs->get_modes)(connector); |
50fe4cfd | 113 | if (!count) { |
9632b41f | 114 | count = drm_add_modes_noedid(connector, 1024, 768); |
50fe4cfd | 115 | if (!count) |
116 | return 0; | |
117 | } | |
f453ba04 | 118 | |
40a518d9 | 119 | drm_mode_connector_list_update(connector); |
f453ba04 DA |
120 | |
121 | if (maxX && maxY) | |
122 | drm_mode_validate_size(dev, &connector->modes, maxX, | |
123 | maxY, 0); | |
6714977b | 124 | |
125 | if (connector->interlace_allowed) | |
126 | mode_flags |= DRM_MODE_FLAG_INTERLACE; | |
127 | if (connector->doublescan_allowed) | |
128 | mode_flags |= DRM_MODE_FLAG_DBLSCAN; | |
129 | drm_mode_validate_flag(connector, mode_flags); | |
130 | ||
f453ba04 DA |
131 | list_for_each_entry_safe(mode, t, &connector->modes, head) { |
132 | if (mode->status == MODE_OK) | |
133 | mode->status = connector_funcs->mode_valid(connector, | |
134 | mode); | |
135 | } | |
136 | ||
620f3781 | 137 | prune: |
f453ba04 DA |
138 | drm_mode_prune_invalid(dev, &connector->modes, true); |
139 | ||
40a518d9 JB |
140 | if (list_empty(&connector->modes)) |
141 | return 0; | |
f453ba04 DA |
142 | |
143 | drm_mode_sort(&connector->modes); | |
144 | ||
9440106b JG |
145 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, |
146 | drm_get_connector_name(connector)); | |
f453ba04 DA |
147 | list_for_each_entry_safe(mode, t, &connector->modes, head) { |
148 | mode->vrefresh = drm_mode_vrefresh(mode); | |
149 | ||
150 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); | |
151 | drm_mode_debug_printmodeline(mode); | |
152 | } | |
40a518d9 JB |
153 | |
154 | return count; | |
f453ba04 DA |
155 | } |
156 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); | |
157 | ||
c9fb15f6 KP |
158 | /** |
159 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
160 | * @encoder: encoder to check | |
161 | * | |
162 | * LOCKING: | |
163 | * Caller must hold mode config lock. | |
164 | * | |
165 | * Walk @encoders's DRM device's mode_config and see if it's in use. | |
166 | * | |
167 | * RETURNS: | |
168 | * True if @encoder is part of the mode_config, false otherwise. | |
169 | */ | |
170 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
171 | { | |
172 | struct drm_connector *connector; | |
173 | struct drm_device *dev = encoder->dev; | |
174 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
175 | if (connector->encoder == encoder) | |
176 | return true; | |
177 | return false; | |
178 | } | |
179 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
180 | ||
f453ba04 DA |
181 | /** |
182 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
183 | * @crtc: CRTC to check | |
184 | * | |
185 | * LOCKING: | |
186 | * Caller must hold mode config lock. | |
187 | * | |
188 | * Walk @crtc's DRM device's mode_config and see if it's in use. | |
189 | * | |
190 | * RETURNS: | |
191 | * True if @crtc is part of the mode_config, false otherwise. | |
192 | */ | |
193 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
194 | { | |
195 | struct drm_encoder *encoder; | |
196 | struct drm_device *dev = crtc->dev; | |
197 | /* FIXME: Locking around list access? */ | |
198 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) | |
c9fb15f6 | 199 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
200 | return true; |
201 | return false; | |
202 | } | |
203 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
204 | ||
86a1b9d1 BS |
205 | static void |
206 | drm_encoder_disable(struct drm_encoder *encoder) | |
207 | { | |
208 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
209 | ||
210 | if (encoder_funcs->disable) | |
211 | (*encoder_funcs->disable)(encoder); | |
212 | else | |
213 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
214 | } | |
215 | ||
f453ba04 | 216 | /** |
89347bb8 | 217 | * drm_helper_disable_unused_functions - disable unused objects |
f453ba04 DA |
218 | * @dev: DRM device |
219 | * | |
220 | * LOCKING: | |
221 | * Caller must hold mode config lock. | |
222 | * | |
223 | * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled | |
224 | * by calling its dpms function, which should power it off. | |
225 | */ | |
226 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
227 | { | |
228 | struct drm_encoder *encoder; | |
a3a0544b | 229 | struct drm_connector *connector; |
f453ba04 DA |
230 | struct drm_crtc *crtc; |
231 | ||
a3a0544b DA |
232 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
233 | if (!connector->encoder) | |
234 | continue; | |
235 | if (connector->status == connector_status_disconnected) | |
236 | connector->encoder = NULL; | |
237 | } | |
238 | ||
f453ba04 | 239 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
a3a0544b | 240 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 241 | drm_encoder_disable(encoder); |
9c552dd7 DA |
242 | /* disconnector encoder from any connector */ |
243 | encoder->crtc = NULL; | |
a3a0544b | 244 | } |
f453ba04 DA |
245 | } |
246 | ||
247 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
248 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
249 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
250 | if (!crtc->enabled) { | |
5c8d7171 AD |
251 | if (crtc_funcs->disable) |
252 | (*crtc_funcs->disable)(crtc); | |
253 | else | |
254 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f453ba04 DA |
255 | crtc->fb = NULL; |
256 | } | |
257 | } | |
258 | } | |
259 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); | |
260 | ||
7bec756c JB |
261 | /** |
262 | * drm_encoder_crtc_ok - can a given crtc drive a given encoder? | |
263 | * @encoder: encoder to test | |
264 | * @crtc: crtc to test | |
265 | * | |
266 | * Return false if @encoder can't be driven by @crtc, true otherwise. | |
267 | */ | |
268 | static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, | |
269 | struct drm_crtc *crtc) | |
270 | { | |
271 | struct drm_device *dev; | |
272 | struct drm_crtc *tmp; | |
273 | int crtc_mask = 1; | |
274 | ||
275 | WARN(!crtc, "checking null crtc?"); | |
276 | ||
277 | dev = crtc->dev; | |
278 | ||
279 | list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { | |
280 | if (tmp == crtc) | |
281 | break; | |
282 | crtc_mask <<= 1; | |
283 | } | |
284 | ||
285 | if (encoder->possible_crtcs & crtc_mask) | |
286 | return true; | |
287 | return false; | |
288 | } | |
289 | ||
290 | /* | |
291 | * Check the CRTC we're going to map each output to vs. its current | |
292 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
293 | * since the driver will have to re-route things. | |
294 | */ | |
295 | static void | |
296 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
297 | { | |
298 | struct drm_encoder_helper_funcs *encoder_funcs; | |
299 | struct drm_encoder *encoder; | |
300 | ||
301 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
302 | encoder_funcs = encoder->helper_private; | |
303 | /* Disable unused encoders */ | |
304 | if (encoder->crtc == NULL) | |
86a1b9d1 | 305 | drm_encoder_disable(encoder); |
7bec756c JB |
306 | /* Disable encoders whose CRTC is about to change */ |
307 | if (encoder_funcs->get_crtc && | |
308 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 309 | drm_encoder_disable(encoder); |
7bec756c JB |
310 | } |
311 | } | |
312 | ||
f453ba04 DA |
313 | /** |
314 | * drm_crtc_set_mode - set a mode | |
315 | * @crtc: CRTC to program | |
316 | * @mode: mode to use | |
317 | * @x: width of mode | |
318 | * @y: height of mode | |
319 | * | |
320 | * LOCKING: | |
321 | * Caller must hold mode config lock. | |
322 | * | |
323 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance | |
324 | * to fixup or reject the mode prior to trying to set it. | |
325 | * | |
326 | * RETURNS: | |
327 | * True if the mode was set successfully, or false otherwise. | |
328 | */ | |
329 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
330 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
331 | int x, int y, |
332 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
333 | { |
334 | struct drm_device *dev = crtc->dev; | |
335 | struct drm_display_mode *adjusted_mode, saved_mode; | |
336 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
337 | struct drm_encoder_helper_funcs *encoder_funcs; | |
338 | int saved_x, saved_y; | |
339 | struct drm_encoder *encoder; | |
340 | bool ret = true; | |
341 | ||
342 | adjusted_mode = drm_mode_duplicate(dev, mode); | |
343 | ||
344 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
345 | ||
346 | if (!crtc->enabled) | |
347 | return true; | |
348 | ||
349 | saved_mode = crtc->mode; | |
350 | saved_x = crtc->x; | |
351 | saved_y = crtc->y; | |
352 | ||
353 | /* Update crtc values up front so the driver can rely on them for mode | |
354 | * setting. | |
355 | */ | |
356 | crtc->mode = *mode; | |
357 | crtc->x = x; | |
358 | crtc->y = y; | |
359 | ||
f453ba04 DA |
360 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
361 | * adjust it according to limitations or connector properties, and also | |
362 | * a chance to reject the mode entirely. | |
363 | */ | |
364 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
365 | ||
366 | if (encoder->crtc != crtc) | |
367 | continue; | |
368 | encoder_funcs = encoder->helper_private; | |
369 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
370 | adjusted_mode))) { | |
371 | goto done; | |
372 | } | |
373 | } | |
374 | ||
375 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { | |
376 | goto done; | |
377 | } | |
9440106b | 378 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
f453ba04 DA |
379 | |
380 | /* Prepare the encoders and CRTCs before setting the mode. */ | |
381 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
382 | ||
383 | if (encoder->crtc != crtc) | |
384 | continue; | |
385 | encoder_funcs = encoder->helper_private; | |
386 | /* Disable the encoders as the first thing we do. */ | |
387 | encoder_funcs->prepare(encoder); | |
388 | } | |
389 | ||
7bec756c JB |
390 | drm_crtc_prepare_encoders(dev); |
391 | ||
f453ba04 DA |
392 | crtc_funcs->prepare(crtc); |
393 | ||
394 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
395 | * on the DPLL. | |
396 | */ | |
5c3b82e2 CW |
397 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
398 | if (!ret) | |
399 | goto done; | |
f453ba04 DA |
400 | |
401 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
402 | ||
403 | if (encoder->crtc != crtc) | |
404 | continue; | |
405 | ||
9440106b JG |
406 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
407 | encoder->base.id, drm_get_encoder_name(encoder), | |
408 | mode->base.id, mode->name); | |
f453ba04 DA |
409 | encoder_funcs = encoder->helper_private; |
410 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
411 | } | |
412 | ||
413 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
414 | crtc_funcs->commit(crtc); | |
415 | ||
416 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
417 | ||
418 | if (encoder->crtc != crtc) | |
419 | continue; | |
420 | ||
421 | encoder_funcs = encoder->helper_private; | |
422 | encoder_funcs->commit(encoder); | |
423 | ||
424 | } | |
425 | ||
426 | /* XXX free adjustedmode */ | |
427 | drm_mode_destroy(dev, adjusted_mode); | |
428 | /* FIXME: add subpixel order */ | |
429 | done: | |
430 | if (!ret) { | |
431 | crtc->mode = saved_mode; | |
432 | crtc->x = saved_x; | |
433 | crtc->y = saved_y; | |
434 | } | |
435 | ||
436 | return ret; | |
437 | } | |
438 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
439 | ||
440 | ||
441 | /** | |
442 | * drm_crtc_helper_set_config - set a new config from userspace | |
443 | * @crtc: CRTC to setup | |
444 | * @crtc_info: user provided configuration | |
445 | * @new_mode: new mode to set | |
446 | * @connector_set: set of connectors for the new config | |
447 | * @fb: new framebuffer | |
448 | * | |
449 | * LOCKING: | |
450 | * Caller must hold mode config lock. | |
451 | * | |
452 | * Setup a new configuration, provided by the user in @crtc_info, and enable | |
453 | * it. | |
454 | * | |
455 | * RETURNS: | |
456 | * Zero. (FIXME) | |
457 | */ | |
458 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
459 | { | |
460 | struct drm_device *dev; | |
e67aae79 MM |
461 | struct drm_crtc *save_crtcs, *new_crtc, *crtc; |
462 | struct drm_encoder *save_encoders, *new_encoder, *encoder; | |
7bec756c | 463 | struct drm_framebuffer *old_fb = NULL; |
4cb72b17 JB |
464 | bool mode_changed = false; /* if true do a full mode set */ |
465 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
e67aae79 | 466 | struct drm_connector *save_connectors, *connector; |
f453ba04 DA |
467 | int count = 0, ro, fail = 0; |
468 | struct drm_crtc_helper_funcs *crtc_funcs; | |
469 | int ret = 0; | |
470 | ||
58367ed6 | 471 | DRM_DEBUG_KMS("\n"); |
f453ba04 DA |
472 | |
473 | if (!set) | |
474 | return -EINVAL; | |
475 | ||
476 | if (!set->crtc) | |
477 | return -EINVAL; | |
478 | ||
479 | if (!set->crtc->helper_private) | |
480 | return -EINVAL; | |
481 | ||
482 | crtc_funcs = set->crtc->helper_private; | |
483 | ||
9440106b JG |
484 | if (set->fb) { |
485 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", | |
486 | set->crtc->base.id, set->fb->base.id, | |
487 | (int)set->num_connectors, set->x, set->y); | |
488 | } else { | |
489 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB] #connectors=%d (x y) (%i %i)\n", | |
490 | set->crtc->base.id, (int)set->num_connectors, | |
491 | set->x, set->y); | |
492 | } | |
f453ba04 DA |
493 | |
494 | dev = set->crtc->dev; | |
495 | ||
e67aae79 MM |
496 | /* Allocate space for the backup of all (non-pointer) crtc, encoder and |
497 | * connector data. */ | |
498 | save_crtcs = kzalloc(dev->mode_config.num_crtc * | |
499 | sizeof(struct drm_crtc), GFP_KERNEL); | |
f453ba04 DA |
500 | if (!save_crtcs) |
501 | return -ENOMEM; | |
502 | ||
e67aae79 MM |
503 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
504 | sizeof(struct drm_encoder), GFP_KERNEL); | |
f453ba04 DA |
505 | if (!save_encoders) { |
506 | kfree(save_crtcs); | |
507 | return -ENOMEM; | |
508 | } | |
509 | ||
e67aae79 MM |
510 | save_connectors = kzalloc(dev->mode_config.num_connector * |
511 | sizeof(struct drm_connector), GFP_KERNEL); | |
512 | if (!save_connectors) { | |
513 | kfree(save_crtcs); | |
514 | kfree(save_encoders); | |
515 | return -ENOMEM; | |
516 | } | |
517 | ||
518 | /* Copy data. Note that driver private data is not affected. | |
519 | * Should anything bad happen only the expected state is | |
520 | * restored, not the drivers personal bookkeeping. | |
521 | */ | |
522 | count = 0; | |
523 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
524 | save_crtcs[count++] = *crtc; | |
525 | } | |
526 | ||
527 | count = 0; | |
528 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
529 | save_encoders[count++] = *encoder; | |
530 | } | |
531 | ||
532 | count = 0; | |
533 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
534 | save_connectors[count++] = *connector; | |
535 | } | |
536 | ||
f453ba04 DA |
537 | /* We should be able to check here if the fb has the same properties |
538 | * and then just flip_or_move it */ | |
539 | if (set->crtc->fb != set->fb) { | |
712531bf | 540 | /* If we have no fb then treat it as a full mode set */ |
7bec756c | 541 | if (set->crtc->fb == NULL) { |
58367ed6 | 542 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 543 | mode_changed = true; |
4cb72b17 JB |
544 | } else if (set->fb == NULL) { |
545 | mode_changed = true; | |
8dff4742 | 546 | } else |
712531bf | 547 | fb_changed = true; |
f453ba04 DA |
548 | } |
549 | ||
550 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 551 | fb_changed = true; |
f453ba04 DA |
552 | |
553 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { | |
58367ed6 | 554 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
555 | drm_mode_debug_printmodeline(&set->crtc->mode); |
556 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 557 | mode_changed = true; |
f453ba04 DA |
558 | } |
559 | ||
560 | /* a) traverse passed in connector list and get encoders for them */ | |
561 | count = 0; | |
562 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
563 | struct drm_connector_helper_funcs *connector_funcs = | |
564 | connector->helper_private; | |
f453ba04 DA |
565 | new_encoder = connector->encoder; |
566 | for (ro = 0; ro < set->num_connectors; ro++) { | |
567 | if (set->connectors[ro] == connector) { | |
568 | new_encoder = connector_funcs->best_encoder(connector); | |
569 | /* if we can't get an encoder for a connector | |
570 | we are setting now - then fail */ | |
571 | if (new_encoder == NULL) | |
572 | /* don't break so fail path works correct */ | |
573 | fail = 1; | |
574 | break; | |
575 | } | |
576 | } | |
577 | ||
578 | if (new_encoder != connector->encoder) { | |
58367ed6 | 579 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 580 | mode_changed = true; |
ff846ab7 MM |
581 | /* If the encoder is reused for another connector, then |
582 | * the appropriate crtc will be set later. | |
583 | */ | |
ff6fdbed MM |
584 | if (connector->encoder) |
585 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
586 | connector->encoder = new_encoder; |
587 | } | |
588 | } | |
589 | ||
590 | if (fail) { | |
591 | ret = -EINVAL; | |
e67aae79 | 592 | goto fail; |
f453ba04 DA |
593 | } |
594 | ||
595 | count = 0; | |
596 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
597 | if (!connector->encoder) | |
598 | continue; | |
599 | ||
f453ba04 DA |
600 | if (connector->encoder->crtc == set->crtc) |
601 | new_crtc = NULL; | |
602 | else | |
603 | new_crtc = connector->encoder->crtc; | |
604 | ||
605 | for (ro = 0; ro < set->num_connectors; ro++) { | |
606 | if (set->connectors[ro] == connector) | |
607 | new_crtc = set->crtc; | |
608 | } | |
7bec756c JB |
609 | |
610 | /* Make sure the new CRTC will work with the encoder */ | |
611 | if (new_crtc && | |
612 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
613 | ret = -EINVAL; | |
e67aae79 | 614 | goto fail; |
7bec756c | 615 | } |
f453ba04 | 616 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 617 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 618 | mode_changed = true; |
f453ba04 DA |
619 | connector->encoder->crtc = new_crtc; |
620 | } | |
9440106b JG |
621 | if (new_crtc) { |
622 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", | |
623 | connector->base.id, drm_get_connector_name(connector), | |
624 | new_crtc->base.id); | |
625 | } else { | |
626 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
627 | connector->base.id, drm_get_connector_name(connector)); | |
628 | } | |
f453ba04 DA |
629 | } |
630 | ||
631 | /* mode_set_base is not a required function */ | |
712531bf JB |
632 | if (fb_changed && !crtc_funcs->mode_set_base) |
633 | mode_changed = true; | |
f453ba04 | 634 | |
712531bf | 635 | if (mode_changed) { |
3c4fdcfb | 636 | old_fb = set->crtc->fb; |
f453ba04 DA |
637 | set->crtc->fb = set->fb; |
638 | set->crtc->enabled = (set->mode != NULL); | |
639 | if (set->mode != NULL) { | |
58367ed6 ZY |
640 | DRM_DEBUG_KMS("attempting to set mode from" |
641 | " userspace\n"); | |
f453ba04 DA |
642 | drm_mode_debug_printmodeline(set->mode); |
643 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, | |
3c4fdcfb KH |
644 | set->x, set->y, |
645 | old_fb)) { | |
9440106b JG |
646 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
647 | set->crtc->base.id); | |
f453ba04 | 648 | ret = -EINVAL; |
e67aae79 | 649 | goto fail; |
f453ba04 | 650 | } |
f453ba04 DA |
651 | } |
652 | drm_helper_disable_unused_functions(dev); | |
712531bf | 653 | } else if (fb_changed) { |
9b1596af BS |
654 | set->crtc->x = set->x; |
655 | set->crtc->y = set->y; | |
656 | ||
3c4fdcfb | 657 | old_fb = set->crtc->fb; |
f453ba04 DA |
658 | if (set->crtc->fb != set->fb) |
659 | set->crtc->fb = set->fb; | |
5c3b82e2 CW |
660 | ret = crtc_funcs->mode_set_base(set->crtc, |
661 | set->x, set->y, old_fb); | |
662 | if (ret != 0) | |
e67aae79 | 663 | goto fail; |
f453ba04 DA |
664 | } |
665 | ||
e67aae79 | 666 | kfree(save_connectors); |
f453ba04 DA |
667 | kfree(save_encoders); |
668 | kfree(save_crtcs); | |
669 | return 0; | |
670 | ||
e67aae79 MM |
671 | fail: |
672 | /* Restore all previous data. */ | |
f453ba04 | 673 | count = 0; |
e67aae79 MM |
674 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
675 | *crtc = save_crtcs[count++]; | |
676 | } | |
e62fb64e | 677 | |
e67aae79 MM |
678 | count = 0; |
679 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
680 | *encoder = save_encoders[count++]; | |
e62fb64e | 681 | } |
e67aae79 | 682 | |
f453ba04 DA |
683 | count = 0; |
684 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
e67aae79 | 685 | *connector = save_connectors[count++]; |
f453ba04 | 686 | } |
e67aae79 MM |
687 | |
688 | kfree(save_connectors); | |
f453ba04 | 689 | kfree(save_encoders); |
e67aae79 | 690 | kfree(save_crtcs); |
f453ba04 DA |
691 | return ret; |
692 | } | |
693 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
694 | ||
c9fb15f6 KP |
695 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
696 | { | |
697 | int dpms = DRM_MODE_DPMS_OFF; | |
698 | struct drm_connector *connector; | |
699 | struct drm_device *dev = encoder->dev; | |
700 | ||
701 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
702 | if (connector->encoder == encoder) | |
703 | if (connector->dpms < dpms) | |
704 | dpms = connector->dpms; | |
705 | return dpms; | |
706 | } | |
707 | ||
708 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) | |
709 | { | |
710 | int dpms = DRM_MODE_DPMS_OFF; | |
711 | struct drm_connector *connector; | |
712 | struct drm_device *dev = crtc->dev; | |
713 | ||
714 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
715 | if (connector->encoder && connector->encoder->crtc == crtc) | |
716 | if (connector->dpms < dpms) | |
717 | dpms = connector->dpms; | |
718 | return dpms; | |
719 | } | |
720 | ||
721 | /** | |
722 | * drm_helper_connector_dpms | |
723 | * @connector affected connector | |
724 | * @mode DPMS mode | |
725 | * | |
726 | * Calls the low-level connector DPMS function, then | |
727 | * calls appropriate encoder and crtc DPMS functions as well | |
728 | */ | |
729 | void drm_helper_connector_dpms(struct drm_connector *connector, int mode) | |
730 | { | |
731 | struct drm_encoder *encoder = connector->encoder; | |
732 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
733 | int old_dpms; | |
734 | ||
735 | if (mode == connector->dpms) | |
736 | return; | |
737 | ||
738 | old_dpms = connector->dpms; | |
739 | connector->dpms = mode; | |
740 | ||
741 | /* from off to on, do crtc then encoder */ | |
742 | if (mode < old_dpms) { | |
743 | if (crtc) { | |
744 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
745 | if (crtc_funcs->dpms) | |
746 | (*crtc_funcs->dpms) (crtc, | |
747 | drm_helper_choose_crtc_dpms(crtc)); | |
748 | } | |
749 | if (encoder) { | |
750 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
751 | if (encoder_funcs->dpms) | |
752 | (*encoder_funcs->dpms) (encoder, | |
753 | drm_helper_choose_encoder_dpms(encoder)); | |
754 | } | |
755 | } | |
756 | ||
757 | /* from on to off, do encoder then crtc */ | |
758 | if (mode > old_dpms) { | |
759 | if (encoder) { | |
760 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
761 | if (encoder_funcs->dpms) | |
762 | (*encoder_funcs->dpms) (encoder, | |
763 | drm_helper_choose_encoder_dpms(encoder)); | |
764 | } | |
765 | if (crtc) { | |
766 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
767 | if (crtc_funcs->dpms) | |
768 | (*crtc_funcs->dpms) (crtc, | |
769 | drm_helper_choose_crtc_dpms(crtc)); | |
770 | } | |
771 | } | |
772 | ||
773 | return; | |
774 | } | |
775 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
776 | ||
f453ba04 DA |
777 | int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
778 | struct drm_mode_fb_cmd *mode_cmd) | |
779 | { | |
780 | fb->width = mode_cmd->width; | |
781 | fb->height = mode_cmd->height; | |
782 | fb->pitch = mode_cmd->pitch; | |
783 | fb->bits_per_pixel = mode_cmd->bpp; | |
784 | fb->depth = mode_cmd->depth; | |
785 | ||
786 | return 0; | |
787 | } | |
788 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
789 | ||
790 | int drm_helper_resume_force_mode(struct drm_device *dev) | |
791 | { | |
792 | struct drm_crtc *crtc; | |
89347bb8 DJ |
793 | struct drm_encoder *encoder; |
794 | struct drm_encoder_helper_funcs *encoder_funcs; | |
795 | struct drm_crtc_helper_funcs *crtc_funcs; | |
f453ba04 DA |
796 | int ret; |
797 | ||
798 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
799 | ||
800 | if (!crtc->enabled) | |
801 | continue; | |
802 | ||
3c4fdcfb KH |
803 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
804 | crtc->x, crtc->y, crtc->fb); | |
f453ba04 DA |
805 | |
806 | if (ret == false) | |
807 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
808 | |
809 | /* Turn off outputs that were already powered off */ | |
810 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
811 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
812 | ||
813 | if(encoder->crtc != crtc) | |
814 | continue; | |
815 | ||
816 | encoder_funcs = encoder->helper_private; | |
817 | if (encoder_funcs->dpms) | |
818 | (*encoder_funcs->dpms) (encoder, | |
819 | drm_helper_choose_encoder_dpms(encoder)); | |
820 | ||
821 | crtc_funcs = crtc->helper_private; | |
822 | if (crtc_funcs->dpms) | |
823 | (*crtc_funcs->dpms) (crtc, | |
824 | drm_helper_choose_crtc_dpms(crtc)); | |
825 | } | |
826 | } | |
f453ba04 | 827 | } |
af4fcb57 ZY |
828 | /* disable the unused connectors while restoring the modesetting */ |
829 | drm_helper_disable_unused_functions(dev); | |
f453ba04 DA |
830 | return 0; |
831 | } | |
832 | EXPORT_SYMBOL(drm_helper_resume_force_mode); | |
eb1f8e4f | 833 | |
eb1f8e4f | 834 | #define DRM_OUTPUT_POLL_PERIOD (10*HZ) |
991ea75c | 835 | static void output_poll_execute(struct work_struct *work) |
eb1f8e4f | 836 | { |
991ea75c TH |
837 | struct delayed_work *delayed_work = to_delayed_work(work); |
838 | struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); | |
eb1f8e4f DA |
839 | struct drm_connector *connector; |
840 | enum drm_connector_status old_status, status; | |
841 | bool repoll = false, changed = false; | |
842 | int ret; | |
843 | ||
844 | mutex_lock(&dev->mode_config.mutex); | |
845 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
846 | ||
847 | /* if this is HPD or polled don't check it - | |
848 | TV out for instance */ | |
849 | if (!connector->polled) | |
850 | continue; | |
851 | ||
852 | else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT)) | |
853 | repoll = true; | |
854 | ||
855 | old_status = connector->status; | |
856 | /* if we are connected and don't want to poll for disconnect | |
857 | skip it */ | |
858 | if (old_status == connector_status_connected && | |
859 | !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) && | |
860 | !(connector->polled & DRM_CONNECTOR_POLL_HPD)) | |
861 | continue; | |
862 | ||
863 | status = connector->funcs->detect(connector); | |
864 | if (old_status != status) | |
865 | changed = true; | |
866 | } | |
867 | ||
868 | mutex_unlock(&dev->mode_config.mutex); | |
869 | ||
870 | if (changed) { | |
871 | /* send a uevent + call fbdev */ | |
872 | drm_sysfs_hotplug_event(dev); | |
873 | if (dev->mode_config.funcs->output_poll_changed) | |
874 | dev->mode_config.funcs->output_poll_changed(dev); | |
875 | } | |
876 | ||
877 | if (repoll) { | |
991ea75c | 878 | ret = queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD); |
eb1f8e4f DA |
879 | if (ret) |
880 | DRM_ERROR("delayed enqueue failed %d\n", ret); | |
881 | } | |
882 | } | |
883 | ||
fbf81762 DA |
884 | void drm_kms_helper_poll_disable(struct drm_device *dev) |
885 | { | |
886 | if (!dev->mode_config.poll_enabled) | |
887 | return; | |
991ea75c | 888 | cancel_delayed_work_sync(&dev->mode_config.output_poll_work); |
fbf81762 DA |
889 | } |
890 | EXPORT_SYMBOL(drm_kms_helper_poll_disable); | |
891 | ||
892 | void drm_kms_helper_poll_enable(struct drm_device *dev) | |
eb1f8e4f | 893 | { |
eb1f8e4f | 894 | bool poll = false; |
fbf81762 | 895 | struct drm_connector *connector; |
eb1f8e4f DA |
896 | int ret; |
897 | ||
898 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
899 | if (connector->polled) | |
900 | poll = true; | |
901 | } | |
eb1f8e4f DA |
902 | |
903 | if (poll) { | |
991ea75c | 904 | ret = queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); |
eb1f8e4f DA |
905 | if (ret) |
906 | DRM_ERROR("delayed enqueue failed %d\n", ret); | |
907 | } | |
908 | } | |
fbf81762 DA |
909 | EXPORT_SYMBOL(drm_kms_helper_poll_enable); |
910 | ||
911 | void drm_kms_helper_poll_init(struct drm_device *dev) | |
912 | { | |
991ea75c | 913 | INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); |
fbf81762 DA |
914 | dev->mode_config.poll_enabled = true; |
915 | ||
916 | drm_kms_helper_poll_enable(dev); | |
917 | } | |
eb1f8e4f DA |
918 | EXPORT_SYMBOL(drm_kms_helper_poll_init); |
919 | ||
920 | void drm_kms_helper_poll_fini(struct drm_device *dev) | |
921 | { | |
fbf81762 | 922 | drm_kms_helper_poll_disable(dev); |
eb1f8e4f DA |
923 | } |
924 | EXPORT_SYMBOL(drm_kms_helper_poll_fini); | |
925 | ||
926 | void drm_helper_hpd_irq_event(struct drm_device *dev) | |
927 | { | |
928 | if (!dev->mode_config.poll_enabled) | |
929 | return; | |
991ea75c TH |
930 | /* kill timer and schedule immediate execution, this doesn't block */ |
931 | cancel_delayed_work(&dev->mode_config.output_poll_work); | |
932 | queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0); | |
eb1f8e4f DA |
933 | } |
934 | EXPORT_SYMBOL(drm_helper_hpd_irq_event); |