Commit | Line | Data |
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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 | |
e58f637b CW |
37 | static bool drm_kms_helper_poll = true; |
38 | module_param_named(poll, drm_kms_helper_poll, bool, 0600); | |
39 | ||
6714977b | 40 | static void drm_mode_validate_flag(struct drm_connector *connector, |
41 | int flags) | |
42 | { | |
43 | struct drm_display_mode *mode, *t; | |
44 | ||
45 | if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) | |
46 | return; | |
47 | ||
48 | list_for_each_entry_safe(mode, t, &connector->modes, head) { | |
49 | if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && | |
50 | !(flags & DRM_MODE_FLAG_INTERLACE)) | |
51 | mode->status = MODE_NO_INTERLACE; | |
52 | if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && | |
53 | !(flags & DRM_MODE_FLAG_DBLSCAN)) | |
54 | mode->status = MODE_NO_DBLESCAN; | |
55 | } | |
56 | ||
57 | return; | |
58 | } | |
59 | ||
f453ba04 | 60 | /** |
38651674 | 61 | * drm_helper_probe_single_connector_modes - get complete set of display modes |
f453ba04 DA |
62 | * @dev: DRM device |
63 | * @maxX: max width for modes | |
64 | * @maxY: max height for modes | |
65 | * | |
66 | * LOCKING: | |
67 | * Caller must hold mode config lock. | |
68 | * | |
69 | * Based on @dev's mode_config layout, scan all the connectors and try to detect | |
70 | * modes on them. Modes will first be added to the connector's probed_modes | |
71 | * list, then culled (based on validity and the @maxX, @maxY parameters) and | |
72 | * put into the normal modes list. | |
73 | * | |
74 | * Intended to be used either at bootup time or when major configuration | |
75 | * changes have occurred. | |
76 | * | |
77 | * FIXME: take into account monitor limits | |
40a518d9 JB |
78 | * |
79 | * RETURNS: | |
80 | * Number of modes found on @connector. | |
f453ba04 | 81 | */ |
40a518d9 JB |
82 | int drm_helper_probe_single_connector_modes(struct drm_connector *connector, |
83 | uint32_t maxX, uint32_t maxY) | |
f453ba04 DA |
84 | { |
85 | struct drm_device *dev = connector->dev; | |
86 | struct drm_display_mode *mode, *t; | |
87 | struct drm_connector_helper_funcs *connector_funcs = | |
88 | connector->helper_private; | |
40a518d9 | 89 | int count = 0; |
6714977b | 90 | int mode_flags = 0; |
f453ba04 | 91 | |
9440106b JG |
92 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, |
93 | drm_get_connector_name(connector)); | |
f453ba04 DA |
94 | /* set all modes to the unverified state */ |
95 | list_for_each_entry_safe(mode, t, &connector->modes, head) | |
96 | mode->status = MODE_UNVERIFIED; | |
97 | ||
d50ba256 DA |
98 | if (connector->force) { |
99 | if (connector->force == DRM_FORCE_ON) | |
100 | connector->status = connector_status_connected; | |
101 | else | |
102 | connector->status = connector_status_disconnected; | |
103 | if (connector->funcs->force) | |
104 | connector->funcs->force(connector); | |
e58f637b | 105 | } else { |
d50ba256 | 106 | connector->status = connector->funcs->detect(connector); |
e58f637b CW |
107 | drm_helper_hpd_irq_event(dev); |
108 | } | |
f453ba04 DA |
109 | |
110 | if (connector->status == connector_status_disconnected) { | |
9440106b JG |
111 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", |
112 | connector->base.id, drm_get_connector_name(connector)); | |
72539832 | 113 | drm_mode_connector_update_edid_property(connector, NULL); |
620f3781 | 114 | goto prune; |
f453ba04 DA |
115 | } |
116 | ||
40a518d9 | 117 | count = (*connector_funcs->get_modes)(connector); |
50fe4cfd | 118 | if (!count) { |
9632b41f | 119 | count = drm_add_modes_noedid(connector, 1024, 768); |
50fe4cfd | 120 | if (!count) |
121 | return 0; | |
122 | } | |
f453ba04 | 123 | |
40a518d9 | 124 | drm_mode_connector_list_update(connector); |
f453ba04 DA |
125 | |
126 | if (maxX && maxY) | |
127 | drm_mode_validate_size(dev, &connector->modes, maxX, | |
128 | maxY, 0); | |
6714977b | 129 | |
130 | if (connector->interlace_allowed) | |
131 | mode_flags |= DRM_MODE_FLAG_INTERLACE; | |
132 | if (connector->doublescan_allowed) | |
133 | mode_flags |= DRM_MODE_FLAG_DBLSCAN; | |
134 | drm_mode_validate_flag(connector, mode_flags); | |
135 | ||
f453ba04 DA |
136 | list_for_each_entry_safe(mode, t, &connector->modes, head) { |
137 | if (mode->status == MODE_OK) | |
138 | mode->status = connector_funcs->mode_valid(connector, | |
139 | mode); | |
140 | } | |
141 | ||
620f3781 | 142 | prune: |
f453ba04 DA |
143 | drm_mode_prune_invalid(dev, &connector->modes, true); |
144 | ||
40a518d9 JB |
145 | if (list_empty(&connector->modes)) |
146 | return 0; | |
f453ba04 DA |
147 | |
148 | drm_mode_sort(&connector->modes); | |
149 | ||
9440106b JG |
150 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, |
151 | drm_get_connector_name(connector)); | |
f453ba04 DA |
152 | list_for_each_entry_safe(mode, t, &connector->modes, head) { |
153 | mode->vrefresh = drm_mode_vrefresh(mode); | |
154 | ||
155 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); | |
156 | drm_mode_debug_printmodeline(mode); | |
157 | } | |
40a518d9 JB |
158 | |
159 | return count; | |
f453ba04 DA |
160 | } |
161 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); | |
162 | ||
c9fb15f6 KP |
163 | /** |
164 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
165 | * @encoder: encoder to check | |
166 | * | |
167 | * LOCKING: | |
168 | * Caller must hold mode config lock. | |
169 | * | |
170 | * Walk @encoders's DRM device's mode_config and see if it's in use. | |
171 | * | |
172 | * RETURNS: | |
173 | * True if @encoder is part of the mode_config, false otherwise. | |
174 | */ | |
175 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
176 | { | |
177 | struct drm_connector *connector; | |
178 | struct drm_device *dev = encoder->dev; | |
179 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
180 | if (connector->encoder == encoder) | |
181 | return true; | |
182 | return false; | |
183 | } | |
184 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
185 | ||
f453ba04 DA |
186 | /** |
187 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
188 | * @crtc: CRTC to check | |
189 | * | |
190 | * LOCKING: | |
191 | * Caller must hold mode config lock. | |
192 | * | |
193 | * Walk @crtc's DRM device's mode_config and see if it's in use. | |
194 | * | |
195 | * RETURNS: | |
196 | * True if @crtc is part of the mode_config, false otherwise. | |
197 | */ | |
198 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
199 | { | |
200 | struct drm_encoder *encoder; | |
201 | struct drm_device *dev = crtc->dev; | |
202 | /* FIXME: Locking around list access? */ | |
203 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) | |
c9fb15f6 | 204 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
205 | return true; |
206 | return false; | |
207 | } | |
208 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
209 | ||
86a1b9d1 BS |
210 | static void |
211 | drm_encoder_disable(struct drm_encoder *encoder) | |
212 | { | |
213 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
214 | ||
215 | if (encoder_funcs->disable) | |
216 | (*encoder_funcs->disable)(encoder); | |
217 | else | |
218 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
219 | } | |
220 | ||
f453ba04 | 221 | /** |
89347bb8 | 222 | * drm_helper_disable_unused_functions - disable unused objects |
f453ba04 DA |
223 | * @dev: DRM device |
224 | * | |
225 | * LOCKING: | |
226 | * Caller must hold mode config lock. | |
227 | * | |
228 | * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled | |
229 | * by calling its dpms function, which should power it off. | |
230 | */ | |
231 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
232 | { | |
233 | struct drm_encoder *encoder; | |
a3a0544b | 234 | struct drm_connector *connector; |
f453ba04 DA |
235 | struct drm_crtc *crtc; |
236 | ||
a3a0544b DA |
237 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
238 | if (!connector->encoder) | |
239 | continue; | |
240 | if (connector->status == connector_status_disconnected) | |
241 | connector->encoder = NULL; | |
242 | } | |
243 | ||
f453ba04 | 244 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
a3a0544b | 245 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 246 | drm_encoder_disable(encoder); |
9c552dd7 DA |
247 | /* disconnector encoder from any connector */ |
248 | encoder->crtc = NULL; | |
a3a0544b | 249 | } |
f453ba04 DA |
250 | } |
251 | ||
252 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
253 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
254 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
255 | if (!crtc->enabled) { | |
5c8d7171 AD |
256 | if (crtc_funcs->disable) |
257 | (*crtc_funcs->disable)(crtc); | |
258 | else | |
259 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f453ba04 DA |
260 | crtc->fb = NULL; |
261 | } | |
262 | } | |
263 | } | |
264 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); | |
265 | ||
7bec756c JB |
266 | /** |
267 | * drm_encoder_crtc_ok - can a given crtc drive a given encoder? | |
268 | * @encoder: encoder to test | |
269 | * @crtc: crtc to test | |
270 | * | |
271 | * Return false if @encoder can't be driven by @crtc, true otherwise. | |
272 | */ | |
273 | static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, | |
274 | struct drm_crtc *crtc) | |
275 | { | |
276 | struct drm_device *dev; | |
277 | struct drm_crtc *tmp; | |
278 | int crtc_mask = 1; | |
279 | ||
280 | WARN(!crtc, "checking null crtc?"); | |
281 | ||
282 | dev = crtc->dev; | |
283 | ||
284 | list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { | |
285 | if (tmp == crtc) | |
286 | break; | |
287 | crtc_mask <<= 1; | |
288 | } | |
289 | ||
290 | if (encoder->possible_crtcs & crtc_mask) | |
291 | return true; | |
292 | return false; | |
293 | } | |
294 | ||
295 | /* | |
296 | * Check the CRTC we're going to map each output to vs. its current | |
297 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
298 | * since the driver will have to re-route things. | |
299 | */ | |
300 | static void | |
301 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
302 | { | |
303 | struct drm_encoder_helper_funcs *encoder_funcs; | |
304 | struct drm_encoder *encoder; | |
305 | ||
306 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
307 | encoder_funcs = encoder->helper_private; | |
308 | /* Disable unused encoders */ | |
309 | if (encoder->crtc == NULL) | |
86a1b9d1 | 310 | drm_encoder_disable(encoder); |
7bec756c JB |
311 | /* Disable encoders whose CRTC is about to change */ |
312 | if (encoder_funcs->get_crtc && | |
313 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 314 | drm_encoder_disable(encoder); |
7bec756c JB |
315 | } |
316 | } | |
317 | ||
f453ba04 DA |
318 | /** |
319 | * drm_crtc_set_mode - set a mode | |
320 | * @crtc: CRTC to program | |
321 | * @mode: mode to use | |
322 | * @x: width of mode | |
323 | * @y: height of mode | |
324 | * | |
325 | * LOCKING: | |
326 | * Caller must hold mode config lock. | |
327 | * | |
328 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance | |
329 | * to fixup or reject the mode prior to trying to set it. | |
330 | * | |
331 | * RETURNS: | |
332 | * True if the mode was set successfully, or false otherwise. | |
333 | */ | |
334 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
335 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
336 | int x, int y, |
337 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
338 | { |
339 | struct drm_device *dev = crtc->dev; | |
340 | struct drm_display_mode *adjusted_mode, saved_mode; | |
341 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
342 | struct drm_encoder_helper_funcs *encoder_funcs; | |
343 | int saved_x, saved_y; | |
344 | struct drm_encoder *encoder; | |
345 | bool ret = true; | |
346 | ||
347 | adjusted_mode = drm_mode_duplicate(dev, mode); | |
348 | ||
349 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
350 | ||
351 | if (!crtc->enabled) | |
352 | return true; | |
353 | ||
354 | saved_mode = crtc->mode; | |
355 | saved_x = crtc->x; | |
356 | saved_y = crtc->y; | |
357 | ||
358 | /* Update crtc values up front so the driver can rely on them for mode | |
359 | * setting. | |
360 | */ | |
361 | crtc->mode = *mode; | |
362 | crtc->x = x; | |
363 | crtc->y = y; | |
364 | ||
f453ba04 DA |
365 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
366 | * adjust it according to limitations or connector properties, and also | |
367 | * a chance to reject the mode entirely. | |
368 | */ | |
369 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
370 | ||
371 | if (encoder->crtc != crtc) | |
372 | continue; | |
373 | encoder_funcs = encoder->helper_private; | |
374 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
375 | adjusted_mode))) { | |
376 | goto done; | |
377 | } | |
378 | } | |
379 | ||
380 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { | |
381 | goto done; | |
382 | } | |
9440106b | 383 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
f453ba04 DA |
384 | |
385 | /* Prepare the encoders and CRTCs before setting the mode. */ | |
386 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
387 | ||
388 | if (encoder->crtc != crtc) | |
389 | continue; | |
390 | encoder_funcs = encoder->helper_private; | |
391 | /* Disable the encoders as the first thing we do. */ | |
392 | encoder_funcs->prepare(encoder); | |
393 | } | |
394 | ||
7bec756c JB |
395 | drm_crtc_prepare_encoders(dev); |
396 | ||
f453ba04 DA |
397 | crtc_funcs->prepare(crtc); |
398 | ||
399 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
400 | * on the DPLL. | |
401 | */ | |
5c3b82e2 CW |
402 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
403 | if (!ret) | |
404 | goto done; | |
f453ba04 DA |
405 | |
406 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
407 | ||
408 | if (encoder->crtc != crtc) | |
409 | continue; | |
410 | ||
9440106b JG |
411 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
412 | encoder->base.id, drm_get_encoder_name(encoder), | |
413 | mode->base.id, mode->name); | |
f453ba04 DA |
414 | encoder_funcs = encoder->helper_private; |
415 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
416 | } | |
417 | ||
418 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
419 | crtc_funcs->commit(crtc); | |
420 | ||
421 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
422 | ||
423 | if (encoder->crtc != crtc) | |
424 | continue; | |
425 | ||
426 | encoder_funcs = encoder->helper_private; | |
427 | encoder_funcs->commit(encoder); | |
428 | ||
429 | } | |
430 | ||
431 | /* XXX free adjustedmode */ | |
432 | drm_mode_destroy(dev, adjusted_mode); | |
433 | /* FIXME: add subpixel order */ | |
434 | done: | |
435 | if (!ret) { | |
436 | crtc->mode = saved_mode; | |
437 | crtc->x = saved_x; | |
438 | crtc->y = saved_y; | |
439 | } | |
440 | ||
441 | return ret; | |
442 | } | |
443 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
444 | ||
445 | ||
446 | /** | |
447 | * drm_crtc_helper_set_config - set a new config from userspace | |
448 | * @crtc: CRTC to setup | |
449 | * @crtc_info: user provided configuration | |
450 | * @new_mode: new mode to set | |
451 | * @connector_set: set of connectors for the new config | |
452 | * @fb: new framebuffer | |
453 | * | |
454 | * LOCKING: | |
455 | * Caller must hold mode config lock. | |
456 | * | |
457 | * Setup a new configuration, provided by the user in @crtc_info, and enable | |
458 | * it. | |
459 | * | |
460 | * RETURNS: | |
461 | * Zero. (FIXME) | |
462 | */ | |
463 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
464 | { | |
465 | struct drm_device *dev; | |
e67aae79 MM |
466 | struct drm_crtc *save_crtcs, *new_crtc, *crtc; |
467 | struct drm_encoder *save_encoders, *new_encoder, *encoder; | |
7bec756c | 468 | struct drm_framebuffer *old_fb = NULL; |
4cb72b17 JB |
469 | bool mode_changed = false; /* if true do a full mode set */ |
470 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
e67aae79 | 471 | struct drm_connector *save_connectors, *connector; |
f453ba04 DA |
472 | int count = 0, ro, fail = 0; |
473 | struct drm_crtc_helper_funcs *crtc_funcs; | |
474 | int ret = 0; | |
475 | ||
58367ed6 | 476 | DRM_DEBUG_KMS("\n"); |
f453ba04 DA |
477 | |
478 | if (!set) | |
479 | return -EINVAL; | |
480 | ||
481 | if (!set->crtc) | |
482 | return -EINVAL; | |
483 | ||
484 | if (!set->crtc->helper_private) | |
485 | return -EINVAL; | |
486 | ||
487 | crtc_funcs = set->crtc->helper_private; | |
488 | ||
9440106b JG |
489 | if (set->fb) { |
490 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", | |
491 | set->crtc->base.id, set->fb->base.id, | |
492 | (int)set->num_connectors, set->x, set->y); | |
493 | } else { | |
494 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB] #connectors=%d (x y) (%i %i)\n", | |
495 | set->crtc->base.id, (int)set->num_connectors, | |
496 | set->x, set->y); | |
497 | } | |
f453ba04 DA |
498 | |
499 | dev = set->crtc->dev; | |
500 | ||
e67aae79 MM |
501 | /* Allocate space for the backup of all (non-pointer) crtc, encoder and |
502 | * connector data. */ | |
503 | save_crtcs = kzalloc(dev->mode_config.num_crtc * | |
504 | sizeof(struct drm_crtc), GFP_KERNEL); | |
f453ba04 DA |
505 | if (!save_crtcs) |
506 | return -ENOMEM; | |
507 | ||
e67aae79 MM |
508 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
509 | sizeof(struct drm_encoder), GFP_KERNEL); | |
f453ba04 DA |
510 | if (!save_encoders) { |
511 | kfree(save_crtcs); | |
512 | return -ENOMEM; | |
513 | } | |
514 | ||
e67aae79 MM |
515 | save_connectors = kzalloc(dev->mode_config.num_connector * |
516 | sizeof(struct drm_connector), GFP_KERNEL); | |
517 | if (!save_connectors) { | |
518 | kfree(save_crtcs); | |
519 | kfree(save_encoders); | |
520 | return -ENOMEM; | |
521 | } | |
522 | ||
523 | /* Copy data. Note that driver private data is not affected. | |
524 | * Should anything bad happen only the expected state is | |
525 | * restored, not the drivers personal bookkeeping. | |
526 | */ | |
527 | count = 0; | |
528 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
529 | save_crtcs[count++] = *crtc; | |
530 | } | |
531 | ||
532 | count = 0; | |
533 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
534 | save_encoders[count++] = *encoder; | |
535 | } | |
536 | ||
537 | count = 0; | |
538 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
539 | save_connectors[count++] = *connector; | |
540 | } | |
541 | ||
f453ba04 DA |
542 | /* We should be able to check here if the fb has the same properties |
543 | * and then just flip_or_move it */ | |
544 | if (set->crtc->fb != set->fb) { | |
712531bf | 545 | /* If we have no fb then treat it as a full mode set */ |
7bec756c | 546 | if (set->crtc->fb == NULL) { |
58367ed6 | 547 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 548 | mode_changed = true; |
4cb72b17 JB |
549 | } else if (set->fb == NULL) { |
550 | mode_changed = true; | |
8dff4742 | 551 | } else |
712531bf | 552 | fb_changed = true; |
f453ba04 DA |
553 | } |
554 | ||
555 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 556 | fb_changed = true; |
f453ba04 DA |
557 | |
558 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { | |
58367ed6 | 559 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
560 | drm_mode_debug_printmodeline(&set->crtc->mode); |
561 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 562 | mode_changed = true; |
f453ba04 DA |
563 | } |
564 | ||
565 | /* a) traverse passed in connector list and get encoders for them */ | |
566 | count = 0; | |
567 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
568 | struct drm_connector_helper_funcs *connector_funcs = | |
569 | connector->helper_private; | |
f453ba04 DA |
570 | new_encoder = connector->encoder; |
571 | for (ro = 0; ro < set->num_connectors; ro++) { | |
572 | if (set->connectors[ro] == connector) { | |
573 | new_encoder = connector_funcs->best_encoder(connector); | |
574 | /* if we can't get an encoder for a connector | |
575 | we are setting now - then fail */ | |
576 | if (new_encoder == NULL) | |
577 | /* don't break so fail path works correct */ | |
578 | fail = 1; | |
579 | break; | |
580 | } | |
581 | } | |
582 | ||
583 | if (new_encoder != connector->encoder) { | |
58367ed6 | 584 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 585 | mode_changed = true; |
ff846ab7 MM |
586 | /* If the encoder is reused for another connector, then |
587 | * the appropriate crtc will be set later. | |
588 | */ | |
ff6fdbed MM |
589 | if (connector->encoder) |
590 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
591 | connector->encoder = new_encoder; |
592 | } | |
593 | } | |
594 | ||
595 | if (fail) { | |
596 | ret = -EINVAL; | |
e67aae79 | 597 | goto fail; |
f453ba04 DA |
598 | } |
599 | ||
600 | count = 0; | |
601 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
602 | if (!connector->encoder) | |
603 | continue; | |
604 | ||
f453ba04 DA |
605 | if (connector->encoder->crtc == set->crtc) |
606 | new_crtc = NULL; | |
607 | else | |
608 | new_crtc = connector->encoder->crtc; | |
609 | ||
610 | for (ro = 0; ro < set->num_connectors; ro++) { | |
611 | if (set->connectors[ro] == connector) | |
612 | new_crtc = set->crtc; | |
613 | } | |
7bec756c JB |
614 | |
615 | /* Make sure the new CRTC will work with the encoder */ | |
616 | if (new_crtc && | |
617 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
618 | ret = -EINVAL; | |
e67aae79 | 619 | goto fail; |
7bec756c | 620 | } |
f453ba04 | 621 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 622 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 623 | mode_changed = true; |
f453ba04 DA |
624 | connector->encoder->crtc = new_crtc; |
625 | } | |
9440106b JG |
626 | if (new_crtc) { |
627 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", | |
628 | connector->base.id, drm_get_connector_name(connector), | |
629 | new_crtc->base.id); | |
630 | } else { | |
631 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
632 | connector->base.id, drm_get_connector_name(connector)); | |
633 | } | |
f453ba04 DA |
634 | } |
635 | ||
636 | /* mode_set_base is not a required function */ | |
712531bf JB |
637 | if (fb_changed && !crtc_funcs->mode_set_base) |
638 | mode_changed = true; | |
f453ba04 | 639 | |
712531bf | 640 | if (mode_changed) { |
3c4fdcfb | 641 | old_fb = set->crtc->fb; |
f453ba04 DA |
642 | set->crtc->fb = set->fb; |
643 | set->crtc->enabled = (set->mode != NULL); | |
644 | if (set->mode != NULL) { | |
58367ed6 ZY |
645 | DRM_DEBUG_KMS("attempting to set mode from" |
646 | " userspace\n"); | |
f453ba04 DA |
647 | drm_mode_debug_printmodeline(set->mode); |
648 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, | |
3c4fdcfb KH |
649 | set->x, set->y, |
650 | old_fb)) { | |
9440106b JG |
651 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
652 | set->crtc->base.id); | |
f453ba04 | 653 | ret = -EINVAL; |
e67aae79 | 654 | goto fail; |
f453ba04 | 655 | } |
f453ba04 DA |
656 | } |
657 | drm_helper_disable_unused_functions(dev); | |
712531bf | 658 | } else if (fb_changed) { |
9b1596af BS |
659 | set->crtc->x = set->x; |
660 | set->crtc->y = set->y; | |
661 | ||
3c4fdcfb | 662 | old_fb = set->crtc->fb; |
f453ba04 DA |
663 | if (set->crtc->fb != set->fb) |
664 | set->crtc->fb = set->fb; | |
5c3b82e2 CW |
665 | ret = crtc_funcs->mode_set_base(set->crtc, |
666 | set->x, set->y, old_fb); | |
667 | if (ret != 0) | |
e67aae79 | 668 | goto fail; |
f453ba04 DA |
669 | } |
670 | ||
e67aae79 | 671 | kfree(save_connectors); |
f453ba04 DA |
672 | kfree(save_encoders); |
673 | kfree(save_crtcs); | |
674 | return 0; | |
675 | ||
e67aae79 MM |
676 | fail: |
677 | /* Restore all previous data. */ | |
f453ba04 | 678 | count = 0; |
e67aae79 MM |
679 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
680 | *crtc = save_crtcs[count++]; | |
681 | } | |
e62fb64e | 682 | |
e67aae79 MM |
683 | count = 0; |
684 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
685 | *encoder = save_encoders[count++]; | |
e62fb64e | 686 | } |
e67aae79 | 687 | |
f453ba04 DA |
688 | count = 0; |
689 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
e67aae79 | 690 | *connector = save_connectors[count++]; |
f453ba04 | 691 | } |
e67aae79 MM |
692 | |
693 | kfree(save_connectors); | |
f453ba04 | 694 | kfree(save_encoders); |
e67aae79 | 695 | kfree(save_crtcs); |
f453ba04 DA |
696 | return ret; |
697 | } | |
698 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
699 | ||
c9fb15f6 KP |
700 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
701 | { | |
702 | int dpms = DRM_MODE_DPMS_OFF; | |
703 | struct drm_connector *connector; | |
704 | struct drm_device *dev = encoder->dev; | |
705 | ||
706 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
707 | if (connector->encoder == encoder) | |
708 | if (connector->dpms < dpms) | |
709 | dpms = connector->dpms; | |
710 | return dpms; | |
711 | } | |
712 | ||
713 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) | |
714 | { | |
715 | int dpms = DRM_MODE_DPMS_OFF; | |
716 | struct drm_connector *connector; | |
717 | struct drm_device *dev = crtc->dev; | |
718 | ||
719 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
720 | if (connector->encoder && connector->encoder->crtc == crtc) | |
721 | if (connector->dpms < dpms) | |
722 | dpms = connector->dpms; | |
723 | return dpms; | |
724 | } | |
725 | ||
726 | /** | |
727 | * drm_helper_connector_dpms | |
728 | * @connector affected connector | |
729 | * @mode DPMS mode | |
730 | * | |
731 | * Calls the low-level connector DPMS function, then | |
732 | * calls appropriate encoder and crtc DPMS functions as well | |
733 | */ | |
734 | void drm_helper_connector_dpms(struct drm_connector *connector, int mode) | |
735 | { | |
736 | struct drm_encoder *encoder = connector->encoder; | |
737 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
738 | int old_dpms; | |
739 | ||
740 | if (mode == connector->dpms) | |
741 | return; | |
742 | ||
743 | old_dpms = connector->dpms; | |
744 | connector->dpms = mode; | |
745 | ||
746 | /* from off to on, do crtc then encoder */ | |
747 | if (mode < old_dpms) { | |
748 | if (crtc) { | |
749 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
750 | if (crtc_funcs->dpms) | |
751 | (*crtc_funcs->dpms) (crtc, | |
752 | drm_helper_choose_crtc_dpms(crtc)); | |
753 | } | |
754 | if (encoder) { | |
755 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
756 | if (encoder_funcs->dpms) | |
757 | (*encoder_funcs->dpms) (encoder, | |
758 | drm_helper_choose_encoder_dpms(encoder)); | |
759 | } | |
760 | } | |
761 | ||
762 | /* from on to off, do encoder then crtc */ | |
763 | if (mode > old_dpms) { | |
764 | if (encoder) { | |
765 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
766 | if (encoder_funcs->dpms) | |
767 | (*encoder_funcs->dpms) (encoder, | |
768 | drm_helper_choose_encoder_dpms(encoder)); | |
769 | } | |
770 | if (crtc) { | |
771 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
772 | if (crtc_funcs->dpms) | |
773 | (*crtc_funcs->dpms) (crtc, | |
774 | drm_helper_choose_crtc_dpms(crtc)); | |
775 | } | |
776 | } | |
777 | ||
778 | return; | |
779 | } | |
780 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
781 | ||
f453ba04 DA |
782 | int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
783 | struct drm_mode_fb_cmd *mode_cmd) | |
784 | { | |
785 | fb->width = mode_cmd->width; | |
786 | fb->height = mode_cmd->height; | |
787 | fb->pitch = mode_cmd->pitch; | |
788 | fb->bits_per_pixel = mode_cmd->bpp; | |
789 | fb->depth = mode_cmd->depth; | |
790 | ||
791 | return 0; | |
792 | } | |
793 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
794 | ||
795 | int drm_helper_resume_force_mode(struct drm_device *dev) | |
796 | { | |
797 | struct drm_crtc *crtc; | |
89347bb8 DJ |
798 | struct drm_encoder *encoder; |
799 | struct drm_encoder_helper_funcs *encoder_funcs; | |
800 | struct drm_crtc_helper_funcs *crtc_funcs; | |
f453ba04 DA |
801 | int ret; |
802 | ||
803 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
804 | ||
805 | if (!crtc->enabled) | |
806 | continue; | |
807 | ||
3c4fdcfb KH |
808 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
809 | crtc->x, crtc->y, crtc->fb); | |
f453ba04 DA |
810 | |
811 | if (ret == false) | |
812 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
813 | |
814 | /* Turn off outputs that were already powered off */ | |
815 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
816 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
817 | ||
818 | if(encoder->crtc != crtc) | |
819 | continue; | |
820 | ||
821 | encoder_funcs = encoder->helper_private; | |
822 | if (encoder_funcs->dpms) | |
823 | (*encoder_funcs->dpms) (encoder, | |
824 | drm_helper_choose_encoder_dpms(encoder)); | |
89347bb8 | 825 | } |
817e631e CW |
826 | |
827 | crtc_funcs = crtc->helper_private; | |
828 | if (crtc_funcs->dpms) | |
829 | (*crtc_funcs->dpms) (crtc, | |
830 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 831 | } |
f453ba04 | 832 | } |
af4fcb57 ZY |
833 | /* disable the unused connectors while restoring the modesetting */ |
834 | drm_helper_disable_unused_functions(dev); | |
f453ba04 DA |
835 | return 0; |
836 | } | |
837 | EXPORT_SYMBOL(drm_helper_resume_force_mode); | |
eb1f8e4f | 838 | |
eb1f8e4f | 839 | #define DRM_OUTPUT_POLL_PERIOD (10*HZ) |
991ea75c | 840 | static void output_poll_execute(struct work_struct *work) |
eb1f8e4f | 841 | { |
991ea75c TH |
842 | struct delayed_work *delayed_work = to_delayed_work(work); |
843 | struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); | |
eb1f8e4f DA |
844 | struct drm_connector *connector; |
845 | enum drm_connector_status old_status, status; | |
846 | bool repoll = false, changed = false; | |
eb1f8e4f | 847 | |
e58f637b CW |
848 | if (!drm_kms_helper_poll) |
849 | return; | |
850 | ||
eb1f8e4f DA |
851 | mutex_lock(&dev->mode_config.mutex); |
852 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
853 | ||
854 | /* if this is HPD or polled don't check it - | |
855 | TV out for instance */ | |
856 | if (!connector->polled) | |
857 | continue; | |
858 | ||
859 | else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT)) | |
860 | repoll = true; | |
861 | ||
862 | old_status = connector->status; | |
863 | /* if we are connected and don't want to poll for disconnect | |
864 | skip it */ | |
865 | if (old_status == connector_status_connected && | |
866 | !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) && | |
867 | !(connector->polled & DRM_CONNECTOR_POLL_HPD)) | |
868 | continue; | |
869 | ||
870 | status = connector->funcs->detect(connector); | |
871 | if (old_status != status) | |
872 | changed = true; | |
873 | } | |
874 | ||
875 | mutex_unlock(&dev->mode_config.mutex); | |
876 | ||
877 | if (changed) { | |
878 | /* send a uevent + call fbdev */ | |
879 | drm_sysfs_hotplug_event(dev); | |
880 | if (dev->mode_config.funcs->output_poll_changed) | |
881 | dev->mode_config.funcs->output_poll_changed(dev); | |
882 | } | |
883 | ||
9a919c46 TH |
884 | if (repoll) |
885 | queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD); | |
eb1f8e4f DA |
886 | } |
887 | ||
fbf81762 DA |
888 | void drm_kms_helper_poll_disable(struct drm_device *dev) |
889 | { | |
890 | if (!dev->mode_config.poll_enabled) | |
891 | return; | |
991ea75c | 892 | cancel_delayed_work_sync(&dev->mode_config.output_poll_work); |
fbf81762 DA |
893 | } |
894 | EXPORT_SYMBOL(drm_kms_helper_poll_disable); | |
895 | ||
896 | void drm_kms_helper_poll_enable(struct drm_device *dev) | |
eb1f8e4f | 897 | { |
eb1f8e4f | 898 | bool poll = false; |
fbf81762 | 899 | struct drm_connector *connector; |
eb1f8e4f | 900 | |
e58f637b CW |
901 | if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) |
902 | return; | |
903 | ||
eb1f8e4f DA |
904 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
905 | if (connector->polled) | |
906 | poll = true; | |
907 | } | |
eb1f8e4f | 908 | |
9a919c46 TH |
909 | if (poll) |
910 | queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); | |
eb1f8e4f | 911 | } |
fbf81762 DA |
912 | EXPORT_SYMBOL(drm_kms_helper_poll_enable); |
913 | ||
914 | void drm_kms_helper_poll_init(struct drm_device *dev) | |
915 | { | |
991ea75c | 916 | INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); |
fbf81762 DA |
917 | dev->mode_config.poll_enabled = true; |
918 | ||
919 | drm_kms_helper_poll_enable(dev); | |
920 | } | |
eb1f8e4f DA |
921 | EXPORT_SYMBOL(drm_kms_helper_poll_init); |
922 | ||
923 | void drm_kms_helper_poll_fini(struct drm_device *dev) | |
924 | { | |
fbf81762 | 925 | drm_kms_helper_poll_disable(dev); |
eb1f8e4f DA |
926 | } |
927 | EXPORT_SYMBOL(drm_kms_helper_poll_fini); | |
928 | ||
929 | void drm_helper_hpd_irq_event(struct drm_device *dev) | |
930 | { | |
931 | if (!dev->mode_config.poll_enabled) | |
932 | return; | |
e58f637b | 933 | |
991ea75c TH |
934 | /* kill timer and schedule immediate execution, this doesn't block */ |
935 | cancel_delayed_work(&dev->mode_config.output_poll_work); | |
e58f637b CW |
936 | if (drm_kms_helper_poll) |
937 | queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0); | |
eb1f8e4f DA |
938 | } |
939 | EXPORT_SYMBOL(drm_helper_hpd_irq_event); |