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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 { |
930a9e28 | 106 | connector->status = connector->funcs->detect(connector, true); |
551402a3 | 107 | drm_kms_helper_poll_enable(dev); |
e58f637b | 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); |
c7ef35a9 | 118 | if (count == 0 && connector->status == connector_status_connected) |
9632b41f | 119 | count = drm_add_modes_noedid(connector, 1024, 768); |
c7ef35a9 CW |
120 | if (count == 0) |
121 | goto prune; | |
f453ba04 | 122 | |
40a518d9 | 123 | drm_mode_connector_list_update(connector); |
f453ba04 DA |
124 | |
125 | if (maxX && maxY) | |
126 | drm_mode_validate_size(dev, &connector->modes, maxX, | |
127 | maxY, 0); | |
6714977b | 128 | |
129 | if (connector->interlace_allowed) | |
130 | mode_flags |= DRM_MODE_FLAG_INTERLACE; | |
131 | if (connector->doublescan_allowed) | |
132 | mode_flags |= DRM_MODE_FLAG_DBLSCAN; | |
133 | drm_mode_validate_flag(connector, mode_flags); | |
134 | ||
f453ba04 DA |
135 | list_for_each_entry_safe(mode, t, &connector->modes, head) { |
136 | if (mode->status == MODE_OK) | |
137 | mode->status = connector_funcs->mode_valid(connector, | |
138 | mode); | |
139 | } | |
140 | ||
620f3781 | 141 | prune: |
f453ba04 DA |
142 | drm_mode_prune_invalid(dev, &connector->modes, true); |
143 | ||
40a518d9 JB |
144 | if (list_empty(&connector->modes)) |
145 | return 0; | |
f453ba04 DA |
146 | |
147 | drm_mode_sort(&connector->modes); | |
148 | ||
9440106b JG |
149 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, |
150 | drm_get_connector_name(connector)); | |
f453ba04 DA |
151 | list_for_each_entry_safe(mode, t, &connector->modes, head) { |
152 | mode->vrefresh = drm_mode_vrefresh(mode); | |
153 | ||
154 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); | |
155 | drm_mode_debug_printmodeline(mode); | |
156 | } | |
40a518d9 JB |
157 | |
158 | return count; | |
f453ba04 DA |
159 | } |
160 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); | |
161 | ||
c9fb15f6 KP |
162 | /** |
163 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
164 | * @encoder: encoder to check | |
165 | * | |
166 | * LOCKING: | |
167 | * Caller must hold mode config lock. | |
168 | * | |
169 | * Walk @encoders's DRM device's mode_config and see if it's in use. | |
170 | * | |
171 | * RETURNS: | |
172 | * True if @encoder is part of the mode_config, false otherwise. | |
173 | */ | |
174 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
175 | { | |
176 | struct drm_connector *connector; | |
177 | struct drm_device *dev = encoder->dev; | |
178 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
179 | if (connector->encoder == encoder) | |
180 | return true; | |
181 | return false; | |
182 | } | |
183 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
184 | ||
f453ba04 DA |
185 | /** |
186 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
187 | * @crtc: CRTC to check | |
188 | * | |
189 | * LOCKING: | |
190 | * Caller must hold mode config lock. | |
191 | * | |
192 | * Walk @crtc's DRM device's mode_config and see if it's in use. | |
193 | * | |
194 | * RETURNS: | |
195 | * True if @crtc is part of the mode_config, false otherwise. | |
196 | */ | |
197 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
198 | { | |
199 | struct drm_encoder *encoder; | |
200 | struct drm_device *dev = crtc->dev; | |
201 | /* FIXME: Locking around list access? */ | |
202 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) | |
c9fb15f6 | 203 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
204 | return true; |
205 | return false; | |
206 | } | |
207 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
208 | ||
86a1b9d1 BS |
209 | static void |
210 | drm_encoder_disable(struct drm_encoder *encoder) | |
211 | { | |
212 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
213 | ||
214 | if (encoder_funcs->disable) | |
215 | (*encoder_funcs->disable)(encoder); | |
216 | else | |
217 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
218 | } | |
219 | ||
f453ba04 | 220 | /** |
89347bb8 | 221 | * drm_helper_disable_unused_functions - disable unused objects |
f453ba04 DA |
222 | * @dev: DRM device |
223 | * | |
224 | * LOCKING: | |
225 | * Caller must hold mode config lock. | |
226 | * | |
227 | * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled | |
228 | * by calling its dpms function, which should power it off. | |
229 | */ | |
230 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
231 | { | |
232 | struct drm_encoder *encoder; | |
a3a0544b | 233 | struct drm_connector *connector; |
f453ba04 DA |
234 | struct drm_crtc *crtc; |
235 | ||
a3a0544b DA |
236 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
237 | if (!connector->encoder) | |
238 | continue; | |
239 | if (connector->status == connector_status_disconnected) | |
240 | connector->encoder = NULL; | |
241 | } | |
242 | ||
f453ba04 | 243 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
92971021 | 244 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 245 | drm_encoder_disable(encoder); |
9c552dd7 DA |
246 | /* disconnector encoder from any connector */ |
247 | encoder->crtc = NULL; | |
a3a0544b | 248 | } |
f453ba04 DA |
249 | } |
250 | ||
251 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
252 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
253 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
254 | if (!crtc->enabled) { | |
5c8d7171 AD |
255 | if (crtc_funcs->disable) |
256 | (*crtc_funcs->disable)(crtc); | |
257 | else | |
258 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f453ba04 DA |
259 | crtc->fb = NULL; |
260 | } | |
261 | } | |
262 | } | |
263 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); | |
264 | ||
7bec756c JB |
265 | /** |
266 | * drm_encoder_crtc_ok - can a given crtc drive a given encoder? | |
267 | * @encoder: encoder to test | |
268 | * @crtc: crtc to test | |
269 | * | |
270 | * Return false if @encoder can't be driven by @crtc, true otherwise. | |
271 | */ | |
272 | static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, | |
273 | struct drm_crtc *crtc) | |
274 | { | |
275 | struct drm_device *dev; | |
276 | struct drm_crtc *tmp; | |
277 | int crtc_mask = 1; | |
278 | ||
fce7d61b | 279 | WARN(!crtc, "checking null crtc?\n"); |
7bec756c JB |
280 | |
281 | dev = crtc->dev; | |
282 | ||
283 | list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { | |
284 | if (tmp == crtc) | |
285 | break; | |
286 | crtc_mask <<= 1; | |
287 | } | |
288 | ||
289 | if (encoder->possible_crtcs & crtc_mask) | |
290 | return true; | |
291 | return false; | |
292 | } | |
293 | ||
294 | /* | |
295 | * Check the CRTC we're going to map each output to vs. its current | |
296 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
297 | * since the driver will have to re-route things. | |
298 | */ | |
299 | static void | |
300 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
301 | { | |
302 | struct drm_encoder_helper_funcs *encoder_funcs; | |
303 | struct drm_encoder *encoder; | |
304 | ||
305 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
306 | encoder_funcs = encoder->helper_private; | |
307 | /* Disable unused encoders */ | |
308 | if (encoder->crtc == NULL) | |
86a1b9d1 | 309 | drm_encoder_disable(encoder); |
7bec756c JB |
310 | /* Disable encoders whose CRTC is about to change */ |
311 | if (encoder_funcs->get_crtc && | |
312 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 313 | drm_encoder_disable(encoder); |
7bec756c JB |
314 | } |
315 | } | |
316 | ||
f453ba04 DA |
317 | /** |
318 | * drm_crtc_set_mode - set a mode | |
319 | * @crtc: CRTC to program | |
320 | * @mode: mode to use | |
321 | * @x: width of mode | |
322 | * @y: height of mode | |
323 | * | |
324 | * LOCKING: | |
325 | * Caller must hold mode config lock. | |
326 | * | |
327 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance | |
328 | * to fixup or reject the mode prior to trying to set it. | |
329 | * | |
330 | * RETURNS: | |
331 | * True if the mode was set successfully, or false otherwise. | |
332 | */ | |
333 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
334 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
335 | int x, int y, |
336 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
337 | { |
338 | struct drm_device *dev = crtc->dev; | |
27641c3f | 339 | struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
f453ba04 DA |
340 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
341 | struct drm_encoder_helper_funcs *encoder_funcs; | |
342 | int saved_x, saved_y; | |
343 | struct drm_encoder *encoder; | |
344 | bool ret = true; | |
345 | ||
f453ba04 | 346 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
f453ba04 DA |
347 | if (!crtc->enabled) |
348 | return true; | |
349 | ||
021a8455 CW |
350 | adjusted_mode = drm_mode_duplicate(dev, mode); |
351 | ||
27641c3f | 352 | saved_hwmode = crtc->hwmode; |
f453ba04 DA |
353 | saved_mode = crtc->mode; |
354 | saved_x = crtc->x; | |
355 | saved_y = crtc->y; | |
356 | ||
357 | /* Update crtc values up front so the driver can rely on them for mode | |
358 | * setting. | |
359 | */ | |
360 | crtc->mode = *mode; | |
361 | crtc->x = x; | |
362 | crtc->y = y; | |
363 | ||
f453ba04 DA |
364 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
365 | * adjust it according to limitations or connector properties, and also | |
366 | * a chance to reject the mode entirely. | |
367 | */ | |
368 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
369 | ||
370 | if (encoder->crtc != crtc) | |
371 | continue; | |
372 | encoder_funcs = encoder->helper_private; | |
373 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
374 | adjusted_mode))) { | |
375 | goto done; | |
376 | } | |
377 | } | |
378 | ||
379 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { | |
380 | goto done; | |
381 | } | |
9440106b | 382 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
f453ba04 DA |
383 | |
384 | /* Prepare the encoders and CRTCs before setting the mode. */ | |
385 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
386 | ||
387 | if (encoder->crtc != crtc) | |
388 | continue; | |
389 | encoder_funcs = encoder->helper_private; | |
390 | /* Disable the encoders as the first thing we do. */ | |
391 | encoder_funcs->prepare(encoder); | |
392 | } | |
393 | ||
7bec756c JB |
394 | drm_crtc_prepare_encoders(dev); |
395 | ||
f453ba04 DA |
396 | crtc_funcs->prepare(crtc); |
397 | ||
398 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
399 | * on the DPLL. | |
400 | */ | |
5c3b82e2 CW |
401 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
402 | if (!ret) | |
403 | goto done; | |
f453ba04 DA |
404 | |
405 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
406 | ||
407 | if (encoder->crtc != crtc) | |
408 | continue; | |
409 | ||
9440106b JG |
410 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
411 | encoder->base.id, drm_get_encoder_name(encoder), | |
412 | mode->base.id, mode->name); | |
f453ba04 DA |
413 | encoder_funcs = encoder->helper_private; |
414 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
415 | } | |
416 | ||
417 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
418 | crtc_funcs->commit(crtc); | |
419 | ||
420 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
421 | ||
422 | if (encoder->crtc != crtc) | |
423 | continue; | |
424 | ||
425 | encoder_funcs = encoder->helper_private; | |
426 | encoder_funcs->commit(encoder); | |
427 | ||
428 | } | |
429 | ||
27641c3f MK |
430 | /* Store real post-adjustment hardware mode. */ |
431 | crtc->hwmode = *adjusted_mode; | |
432 | ||
433 | /* Calculate and store various constants which | |
434 | * are later needed by vblank and swap-completion | |
435 | * timestamping. They are derived from true hwmode. | |
436 | */ | |
437 | drm_calc_timestamping_constants(crtc); | |
438 | ||
f453ba04 DA |
439 | /* FIXME: add subpixel order */ |
440 | done: | |
021a8455 | 441 | drm_mode_destroy(dev, adjusted_mode); |
f453ba04 | 442 | if (!ret) { |
27641c3f | 443 | crtc->hwmode = saved_hwmode; |
f453ba04 DA |
444 | crtc->mode = saved_mode; |
445 | crtc->x = saved_x; | |
446 | crtc->y = saved_y; | |
447 | } | |
448 | ||
449 | return ret; | |
450 | } | |
451 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
452 | ||
453 | ||
454 | /** | |
455 | * drm_crtc_helper_set_config - set a new config from userspace | |
456 | * @crtc: CRTC to setup | |
457 | * @crtc_info: user provided configuration | |
458 | * @new_mode: new mode to set | |
459 | * @connector_set: set of connectors for the new config | |
460 | * @fb: new framebuffer | |
461 | * | |
462 | * LOCKING: | |
463 | * Caller must hold mode config lock. | |
464 | * | |
465 | * Setup a new configuration, provided by the user in @crtc_info, and enable | |
466 | * it. | |
467 | * | |
468 | * RETURNS: | |
469 | * Zero. (FIXME) | |
470 | */ | |
471 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
472 | { | |
473 | struct drm_device *dev; | |
e67aae79 MM |
474 | struct drm_crtc *save_crtcs, *new_crtc, *crtc; |
475 | struct drm_encoder *save_encoders, *new_encoder, *encoder; | |
7bec756c | 476 | struct drm_framebuffer *old_fb = NULL; |
4cb72b17 JB |
477 | bool mode_changed = false; /* if true do a full mode set */ |
478 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
e67aae79 | 479 | struct drm_connector *save_connectors, *connector; |
f453ba04 DA |
480 | int count = 0, ro, fail = 0; |
481 | struct drm_crtc_helper_funcs *crtc_funcs; | |
482 | int ret = 0; | |
bf9dc102 | 483 | int i; |
f453ba04 | 484 | |
58367ed6 | 485 | DRM_DEBUG_KMS("\n"); |
f453ba04 DA |
486 | |
487 | if (!set) | |
488 | return -EINVAL; | |
489 | ||
490 | if (!set->crtc) | |
491 | return -EINVAL; | |
492 | ||
493 | if (!set->crtc->helper_private) | |
494 | return -EINVAL; | |
495 | ||
496 | crtc_funcs = set->crtc->helper_private; | |
497 | ||
ede3ff52 CW |
498 | if (!set->mode) |
499 | set->fb = NULL; | |
500 | ||
9440106b JG |
501 | if (set->fb) { |
502 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", | |
503 | set->crtc->base.id, set->fb->base.id, | |
504 | (int)set->num_connectors, set->x, set->y); | |
505 | } else { | |
ede3ff52 CW |
506 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); |
507 | set->mode = NULL; | |
508 | set->num_connectors = 0; | |
9440106b | 509 | } |
f453ba04 DA |
510 | |
511 | dev = set->crtc->dev; | |
512 | ||
e67aae79 MM |
513 | /* Allocate space for the backup of all (non-pointer) crtc, encoder and |
514 | * connector data. */ | |
515 | save_crtcs = kzalloc(dev->mode_config.num_crtc * | |
516 | sizeof(struct drm_crtc), GFP_KERNEL); | |
f453ba04 DA |
517 | if (!save_crtcs) |
518 | return -ENOMEM; | |
519 | ||
e67aae79 MM |
520 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
521 | sizeof(struct drm_encoder), GFP_KERNEL); | |
f453ba04 DA |
522 | if (!save_encoders) { |
523 | kfree(save_crtcs); | |
524 | return -ENOMEM; | |
525 | } | |
526 | ||
e67aae79 MM |
527 | save_connectors = kzalloc(dev->mode_config.num_connector * |
528 | sizeof(struct drm_connector), GFP_KERNEL); | |
529 | if (!save_connectors) { | |
530 | kfree(save_crtcs); | |
531 | kfree(save_encoders); | |
532 | return -ENOMEM; | |
533 | } | |
534 | ||
535 | /* Copy data. Note that driver private data is not affected. | |
536 | * Should anything bad happen only the expected state is | |
537 | * restored, not the drivers personal bookkeeping. | |
538 | */ | |
539 | count = 0; | |
540 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
541 | save_crtcs[count++] = *crtc; | |
542 | } | |
543 | ||
544 | count = 0; | |
545 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
546 | save_encoders[count++] = *encoder; | |
547 | } | |
548 | ||
549 | count = 0; | |
550 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
551 | save_connectors[count++] = *connector; | |
552 | } | |
553 | ||
f453ba04 DA |
554 | /* We should be able to check here if the fb has the same properties |
555 | * and then just flip_or_move it */ | |
556 | if (set->crtc->fb != set->fb) { | |
712531bf | 557 | /* If we have no fb then treat it as a full mode set */ |
7bec756c | 558 | if (set->crtc->fb == NULL) { |
58367ed6 | 559 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 560 | mode_changed = true; |
4cb72b17 JB |
561 | } else if (set->fb == NULL) { |
562 | mode_changed = true; | |
46e48456 JB |
563 | } else if (set->fb->depth != set->crtc->fb->depth) { |
564 | mode_changed = true; | |
565 | } else if (set->fb->bits_per_pixel != | |
566 | set->crtc->fb->bits_per_pixel) { | |
567 | mode_changed = true; | |
8dff4742 | 568 | } else |
712531bf | 569 | fb_changed = true; |
f453ba04 DA |
570 | } |
571 | ||
572 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 573 | fb_changed = true; |
f453ba04 DA |
574 | |
575 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { | |
58367ed6 | 576 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
577 | drm_mode_debug_printmodeline(&set->crtc->mode); |
578 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 579 | mode_changed = true; |
f453ba04 DA |
580 | } |
581 | ||
582 | /* a) traverse passed in connector list and get encoders for them */ | |
583 | count = 0; | |
584 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
585 | struct drm_connector_helper_funcs *connector_funcs = | |
586 | connector->helper_private; | |
f453ba04 DA |
587 | new_encoder = connector->encoder; |
588 | for (ro = 0; ro < set->num_connectors; ro++) { | |
589 | if (set->connectors[ro] == connector) { | |
590 | new_encoder = connector_funcs->best_encoder(connector); | |
591 | /* if we can't get an encoder for a connector | |
592 | we are setting now - then fail */ | |
593 | if (new_encoder == NULL) | |
594 | /* don't break so fail path works correct */ | |
595 | fail = 1; | |
596 | break; | |
597 | } | |
598 | } | |
599 | ||
600 | if (new_encoder != connector->encoder) { | |
58367ed6 | 601 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 602 | mode_changed = true; |
ff846ab7 MM |
603 | /* If the encoder is reused for another connector, then |
604 | * the appropriate crtc will be set later. | |
605 | */ | |
ff6fdbed MM |
606 | if (connector->encoder) |
607 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
608 | connector->encoder = new_encoder; |
609 | } | |
610 | } | |
611 | ||
612 | if (fail) { | |
613 | ret = -EINVAL; | |
e67aae79 | 614 | goto fail; |
f453ba04 DA |
615 | } |
616 | ||
617 | count = 0; | |
618 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
619 | if (!connector->encoder) | |
620 | continue; | |
621 | ||
f453ba04 DA |
622 | if (connector->encoder->crtc == set->crtc) |
623 | new_crtc = NULL; | |
624 | else | |
625 | new_crtc = connector->encoder->crtc; | |
626 | ||
627 | for (ro = 0; ro < set->num_connectors; ro++) { | |
628 | if (set->connectors[ro] == connector) | |
629 | new_crtc = set->crtc; | |
630 | } | |
7bec756c JB |
631 | |
632 | /* Make sure the new CRTC will work with the encoder */ | |
633 | if (new_crtc && | |
634 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
635 | ret = -EINVAL; | |
e67aae79 | 636 | goto fail; |
7bec756c | 637 | } |
f453ba04 | 638 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 639 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 640 | mode_changed = true; |
f453ba04 DA |
641 | connector->encoder->crtc = new_crtc; |
642 | } | |
9440106b JG |
643 | if (new_crtc) { |
644 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", | |
645 | connector->base.id, drm_get_connector_name(connector), | |
646 | new_crtc->base.id); | |
647 | } else { | |
648 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
649 | connector->base.id, drm_get_connector_name(connector)); | |
650 | } | |
f453ba04 DA |
651 | } |
652 | ||
653 | /* mode_set_base is not a required function */ | |
712531bf JB |
654 | if (fb_changed && !crtc_funcs->mode_set_base) |
655 | mode_changed = true; | |
f453ba04 | 656 | |
712531bf | 657 | if (mode_changed) { |
9334ef75 CW |
658 | set->crtc->enabled = drm_helper_crtc_in_use(set->crtc); |
659 | if (set->crtc->enabled) { | |
58367ed6 ZY |
660 | DRM_DEBUG_KMS("attempting to set mode from" |
661 | " userspace\n"); | |
f453ba04 | 662 | drm_mode_debug_printmodeline(set->mode); |
356ad3cd CW |
663 | old_fb = set->crtc->fb; |
664 | set->crtc->fb = set->fb; | |
f453ba04 | 665 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
3c4fdcfb KH |
666 | set->x, set->y, |
667 | old_fb)) { | |
9440106b JG |
668 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
669 | set->crtc->base.id); | |
0ba41e44 | 670 | set->crtc->fb = old_fb; |
f453ba04 | 671 | ret = -EINVAL; |
e67aae79 | 672 | goto fail; |
f453ba04 | 673 | } |
811aaa55 KP |
674 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
675 | for (i = 0; i < set->num_connectors; i++) { | |
676 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, | |
677 | drm_get_connector_name(set->connectors[i])); | |
678 | set->connectors[i]->dpms = DRM_MODE_DPMS_ON; | |
679 | } | |
f453ba04 DA |
680 | } |
681 | drm_helper_disable_unused_functions(dev); | |
712531bf | 682 | } else if (fb_changed) { |
9b1596af BS |
683 | set->crtc->x = set->x; |
684 | set->crtc->y = set->y; | |
685 | ||
3c4fdcfb | 686 | old_fb = set->crtc->fb; |
f453ba04 DA |
687 | if (set->crtc->fb != set->fb) |
688 | set->crtc->fb = set->fb; | |
5c3b82e2 CW |
689 | ret = crtc_funcs->mode_set_base(set->crtc, |
690 | set->x, set->y, old_fb); | |
0ba41e44 CW |
691 | if (ret != 0) { |
692 | set->crtc->fb = old_fb; | |
e67aae79 | 693 | goto fail; |
0ba41e44 | 694 | } |
f453ba04 DA |
695 | } |
696 | ||
e67aae79 | 697 | kfree(save_connectors); |
f453ba04 DA |
698 | kfree(save_encoders); |
699 | kfree(save_crtcs); | |
700 | return 0; | |
701 | ||
e67aae79 MM |
702 | fail: |
703 | /* Restore all previous data. */ | |
f453ba04 | 704 | count = 0; |
e67aae79 MM |
705 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
706 | *crtc = save_crtcs[count++]; | |
707 | } | |
e62fb64e | 708 | |
e67aae79 MM |
709 | count = 0; |
710 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
711 | *encoder = save_encoders[count++]; | |
e62fb64e | 712 | } |
e67aae79 | 713 | |
f453ba04 DA |
714 | count = 0; |
715 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
e67aae79 | 716 | *connector = save_connectors[count++]; |
f453ba04 | 717 | } |
e67aae79 MM |
718 | |
719 | kfree(save_connectors); | |
f453ba04 | 720 | kfree(save_encoders); |
e67aae79 | 721 | kfree(save_crtcs); |
f453ba04 DA |
722 | return ret; |
723 | } | |
724 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
725 | ||
c9fb15f6 KP |
726 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
727 | { | |
728 | int dpms = DRM_MODE_DPMS_OFF; | |
729 | struct drm_connector *connector; | |
730 | struct drm_device *dev = encoder->dev; | |
731 | ||
732 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
733 | if (connector->encoder == encoder) | |
734 | if (connector->dpms < dpms) | |
735 | dpms = connector->dpms; | |
736 | return dpms; | |
737 | } | |
738 | ||
739 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) | |
740 | { | |
741 | int dpms = DRM_MODE_DPMS_OFF; | |
742 | struct drm_connector *connector; | |
743 | struct drm_device *dev = crtc->dev; | |
744 | ||
745 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
746 | if (connector->encoder && connector->encoder->crtc == crtc) | |
747 | if (connector->dpms < dpms) | |
748 | dpms = connector->dpms; | |
749 | return dpms; | |
750 | } | |
751 | ||
752 | /** | |
753 | * drm_helper_connector_dpms | |
754 | * @connector affected connector | |
755 | * @mode DPMS mode | |
756 | * | |
757 | * Calls the low-level connector DPMS function, then | |
758 | * calls appropriate encoder and crtc DPMS functions as well | |
759 | */ | |
760 | void drm_helper_connector_dpms(struct drm_connector *connector, int mode) | |
761 | { | |
762 | struct drm_encoder *encoder = connector->encoder; | |
763 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
764 | int old_dpms; | |
765 | ||
766 | if (mode == connector->dpms) | |
767 | return; | |
768 | ||
769 | old_dpms = connector->dpms; | |
770 | connector->dpms = mode; | |
771 | ||
772 | /* from off to on, do crtc then encoder */ | |
773 | if (mode < old_dpms) { | |
774 | if (crtc) { | |
775 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
776 | if (crtc_funcs->dpms) | |
777 | (*crtc_funcs->dpms) (crtc, | |
778 | drm_helper_choose_crtc_dpms(crtc)); | |
779 | } | |
780 | if (encoder) { | |
781 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
782 | if (encoder_funcs->dpms) | |
783 | (*encoder_funcs->dpms) (encoder, | |
784 | drm_helper_choose_encoder_dpms(encoder)); | |
785 | } | |
786 | } | |
787 | ||
788 | /* from on to off, do encoder then crtc */ | |
789 | if (mode > old_dpms) { | |
790 | if (encoder) { | |
791 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
792 | if (encoder_funcs->dpms) | |
793 | (*encoder_funcs->dpms) (encoder, | |
794 | drm_helper_choose_encoder_dpms(encoder)); | |
795 | } | |
796 | if (crtc) { | |
797 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
798 | if (crtc_funcs->dpms) | |
799 | (*crtc_funcs->dpms) (crtc, | |
800 | drm_helper_choose_crtc_dpms(crtc)); | |
801 | } | |
802 | } | |
803 | ||
804 | return; | |
805 | } | |
806 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
807 | ||
f453ba04 DA |
808 | int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
809 | struct drm_mode_fb_cmd *mode_cmd) | |
810 | { | |
811 | fb->width = mode_cmd->width; | |
812 | fb->height = mode_cmd->height; | |
813 | fb->pitch = mode_cmd->pitch; | |
814 | fb->bits_per_pixel = mode_cmd->bpp; | |
815 | fb->depth = mode_cmd->depth; | |
816 | ||
817 | return 0; | |
818 | } | |
819 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
820 | ||
821 | int drm_helper_resume_force_mode(struct drm_device *dev) | |
822 | { | |
823 | struct drm_crtc *crtc; | |
89347bb8 DJ |
824 | struct drm_encoder *encoder; |
825 | struct drm_encoder_helper_funcs *encoder_funcs; | |
826 | struct drm_crtc_helper_funcs *crtc_funcs; | |
f453ba04 DA |
827 | int ret; |
828 | ||
829 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
830 | ||
831 | if (!crtc->enabled) | |
832 | continue; | |
833 | ||
3c4fdcfb KH |
834 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
835 | crtc->x, crtc->y, crtc->fb); | |
f453ba04 DA |
836 | |
837 | if (ret == false) | |
838 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
839 | |
840 | /* Turn off outputs that were already powered off */ | |
841 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
842 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
843 | ||
844 | if(encoder->crtc != crtc) | |
845 | continue; | |
846 | ||
847 | encoder_funcs = encoder->helper_private; | |
848 | if (encoder_funcs->dpms) | |
849 | (*encoder_funcs->dpms) (encoder, | |
850 | drm_helper_choose_encoder_dpms(encoder)); | |
89347bb8 | 851 | } |
817e631e CW |
852 | |
853 | crtc_funcs = crtc->helper_private; | |
854 | if (crtc_funcs->dpms) | |
855 | (*crtc_funcs->dpms) (crtc, | |
856 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 857 | } |
f453ba04 | 858 | } |
af4fcb57 ZY |
859 | /* disable the unused connectors while restoring the modesetting */ |
860 | drm_helper_disable_unused_functions(dev); | |
f453ba04 DA |
861 | return 0; |
862 | } | |
863 | EXPORT_SYMBOL(drm_helper_resume_force_mode); | |
eb1f8e4f | 864 | |
eb1f8e4f | 865 | #define DRM_OUTPUT_POLL_PERIOD (10*HZ) |
991ea75c | 866 | static void output_poll_execute(struct work_struct *work) |
eb1f8e4f | 867 | { |
991ea75c TH |
868 | struct delayed_work *delayed_work = to_delayed_work(work); |
869 | struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); | |
eb1f8e4f | 870 | struct drm_connector *connector; |
c5027dec | 871 | enum drm_connector_status old_status; |
eb1f8e4f | 872 | bool repoll = false, changed = false; |
eb1f8e4f | 873 | |
e58f637b CW |
874 | if (!drm_kms_helper_poll) |
875 | return; | |
876 | ||
eb1f8e4f DA |
877 | mutex_lock(&dev->mode_config.mutex); |
878 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
879 | ||
880 | /* if this is HPD or polled don't check it - | |
881 | TV out for instance */ | |
882 | if (!connector->polled) | |
883 | continue; | |
884 | ||
885 | else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT)) | |
886 | repoll = true; | |
887 | ||
888 | old_status = connector->status; | |
889 | /* if we are connected and don't want to poll for disconnect | |
890 | skip it */ | |
891 | if (old_status == connector_status_connected && | |
892 | !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) && | |
893 | !(connector->polled & DRM_CONNECTOR_POLL_HPD)) | |
894 | continue; | |
895 | ||
c5027dec | 896 | connector->status = connector->funcs->detect(connector, false); |
0f16830e CW |
897 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", |
898 | connector->base.id, | |
899 | drm_get_connector_name(connector), | |
900 | old_status, connector->status); | |
c5027dec | 901 | if (old_status != connector->status) |
eb1f8e4f DA |
902 | changed = true; |
903 | } | |
904 | ||
905 | mutex_unlock(&dev->mode_config.mutex); | |
906 | ||
907 | if (changed) { | |
908 | /* send a uevent + call fbdev */ | |
909 | drm_sysfs_hotplug_event(dev); | |
910 | if (dev->mode_config.funcs->output_poll_changed) | |
911 | dev->mode_config.funcs->output_poll_changed(dev); | |
912 | } | |
913 | ||
9a919c46 TH |
914 | if (repoll) |
915 | queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD); | |
eb1f8e4f DA |
916 | } |
917 | ||
fbf81762 DA |
918 | void drm_kms_helper_poll_disable(struct drm_device *dev) |
919 | { | |
920 | if (!dev->mode_config.poll_enabled) | |
921 | return; | |
991ea75c | 922 | cancel_delayed_work_sync(&dev->mode_config.output_poll_work); |
fbf81762 DA |
923 | } |
924 | EXPORT_SYMBOL(drm_kms_helper_poll_disable); | |
925 | ||
926 | void drm_kms_helper_poll_enable(struct drm_device *dev) | |
eb1f8e4f | 927 | { |
eb1f8e4f | 928 | bool poll = false; |
fbf81762 | 929 | struct drm_connector *connector; |
eb1f8e4f | 930 | |
e58f637b CW |
931 | if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) |
932 | return; | |
933 | ||
eb1f8e4f DA |
934 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
935 | if (connector->polled) | |
936 | poll = true; | |
937 | } | |
eb1f8e4f | 938 | |
9a919c46 TH |
939 | if (poll) |
940 | queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); | |
eb1f8e4f | 941 | } |
fbf81762 DA |
942 | EXPORT_SYMBOL(drm_kms_helper_poll_enable); |
943 | ||
944 | void drm_kms_helper_poll_init(struct drm_device *dev) | |
945 | { | |
991ea75c | 946 | INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); |
fbf81762 DA |
947 | dev->mode_config.poll_enabled = true; |
948 | ||
949 | drm_kms_helper_poll_enable(dev); | |
950 | } | |
eb1f8e4f DA |
951 | EXPORT_SYMBOL(drm_kms_helper_poll_init); |
952 | ||
953 | void drm_kms_helper_poll_fini(struct drm_device *dev) | |
954 | { | |
fbf81762 | 955 | drm_kms_helper_poll_disable(dev); |
eb1f8e4f DA |
956 | } |
957 | EXPORT_SYMBOL(drm_kms_helper_poll_fini); | |
958 | ||
959 | void drm_helper_hpd_irq_event(struct drm_device *dev) | |
960 | { | |
961 | if (!dev->mode_config.poll_enabled) | |
962 | return; | |
e58f637b | 963 | |
991ea75c TH |
964 | /* kill timer and schedule immediate execution, this doesn't block */ |
965 | cancel_delayed_work(&dev->mode_config.output_poll_work); | |
e58f637b CW |
966 | if (drm_kms_helper_poll) |
967 | queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0); | |
eb1f8e4f DA |
968 | } |
969 | EXPORT_SYMBOL(drm_helper_hpd_irq_event); |