blob: 06fc0bccaff71e399979b61ae35ee474631c9c69 [file] [log] [blame]
Dave Airlief453ba02008-11-07 14:05:41 -08001/*
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"
Dave Airlied50ba252009-09-23 14:44:08 +100035#include "drm_fb_helper.h"
Dave Airlief453ba02008-11-07 14:05:41 -080036
Chris Wilsone58f6372010-08-20 09:13:36 +010037static bool drm_kms_helper_poll = true;
38module_param_named(poll, drm_kms_helper_poll, bool, 0600);
39
yakui_zhao67149772009-04-02 11:52:12 +080040static 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
Dave Airlief453ba02008-11-07 14:05:41 -080060/**
Dave Airlie38651672010-03-30 05:34:13 +000061 * drm_helper_probe_single_connector_modes - get complete set of display modes
Dave Airlief453ba02008-11-07 14:05:41 -080062 * @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
Jesse Barnes40a518d2009-01-12 12:05:32 -080078 *
79 * RETURNS:
80 * Number of modes found on @connector.
Dave Airlief453ba02008-11-07 14:05:41 -080081 */
Jesse Barnes40a518d2009-01-12 12:05:32 -080082int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
83 uint32_t maxX, uint32_t maxY)
Dave Airlief453ba02008-11-07 14:05:41 -080084{
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;
Jesse Barnes40a518d2009-01-12 12:05:32 -080089 int count = 0;
yakui_zhao67149772009-04-02 11:52:12 +080090 int mode_flags = 0;
Dave Airlief453ba02008-11-07 14:05:41 -080091
Jerome Glisse94401062010-07-15 15:43:25 -040092 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
93 drm_get_connector_name(connector));
Dave Airlief453ba02008-11-07 14:05:41 -080094 /* set all modes to the unverified state */
95 list_for_each_entry_safe(mode, t, &connector->modes, head)
96 mode->status = MODE_UNVERIFIED;
97
Dave Airlied50ba252009-09-23 14:44:08 +100098 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);
Chris Wilsone58f6372010-08-20 09:13:36 +0100105 } else {
Dave Airlied50ba252009-09-23 14:44:08 +1000106 connector->status = connector->funcs->detect(connector);
Chris Wilsone58f6372010-08-20 09:13:36 +0100107 drm_helper_hpd_irq_event(dev);
108 }
Dave Airlief453ba02008-11-07 14:05:41 -0800109
110 if (connector->status == connector_status_disconnected) {
Jerome Glisse94401062010-07-15 15:43:25 -0400111 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
112 connector->base.id, drm_get_connector_name(connector));
Zhao Yakui72539832010-03-04 08:25:55 +0000113 drm_mode_connector_update_edid_property(connector, NULL);
Adam Jackson620f3782009-09-08 11:51:46 +1000114 goto prune;
Dave Airlief453ba02008-11-07 14:05:41 -0800115 }
116
Jesse Barnes40a518d2009-01-12 12:05:32 -0800117 count = (*connector_funcs->get_modes)(connector);
ykzhao50fe4cf2009-09-03 14:30:04 +0800118 if (!count) {
Adam Jackson9632b412009-11-23 14:23:07 -0500119 count = drm_add_modes_noedid(connector, 1024, 768);
ykzhao50fe4cf2009-09-03 14:30:04 +0800120 if (!count)
121 return 0;
122 }
Dave Airlief453ba02008-11-07 14:05:41 -0800123
Jesse Barnes40a518d2009-01-12 12:05:32 -0800124 drm_mode_connector_list_update(connector);
Dave Airlief453ba02008-11-07 14:05:41 -0800125
126 if (maxX && maxY)
127 drm_mode_validate_size(dev, &connector->modes, maxX,
128 maxY, 0);
yakui_zhao67149772009-04-02 11:52:12 +0800129
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
Dave Airlief453ba02008-11-07 14:05:41 -0800136 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
Adam Jackson620f3782009-09-08 11:51:46 +1000142prune:
Dave Airlief453ba02008-11-07 14:05:41 -0800143 drm_mode_prune_invalid(dev, &connector->modes, true);
144
Jesse Barnes40a518d2009-01-12 12:05:32 -0800145 if (list_empty(&connector->modes))
146 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800147
148 drm_mode_sort(&connector->modes);
149
Jerome Glisse94401062010-07-15 15:43:25 -0400150 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
151 drm_get_connector_name(connector));
Dave Airlief453ba02008-11-07 14:05:41 -0800152 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 }
Jesse Barnes40a518d2009-01-12 12:05:32 -0800158
159 return count;
Dave Airlief453ba02008-11-07 14:05:41 -0800160}
161EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
162
Dave Airlief453ba02008-11-07 14:05:41 -0800163/**
Keith Packardc9fb15f2009-05-30 20:42:28 -0700164 * 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 */
175bool 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}
184EXPORT_SYMBOL(drm_helper_encoder_in_use);
185
186/**
Dave Airlief453ba02008-11-07 14:05:41 -0800187 * 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 */
198bool 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)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700204 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
Dave Airlief453ba02008-11-07 14:05:41 -0800205 return true;
206 return false;
207}
208EXPORT_SYMBOL(drm_helper_crtc_in_use);
209
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000210static void
211drm_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
Dave Airlief453ba02008-11-07 14:05:41 -0800221/**
David John89347bb2009-12-31 12:00:46 +0530222 * drm_helper_disable_unused_functions - disable unused objects
Dave Airlief453ba02008-11-07 14:05:41 -0800223 * @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 */
231void drm_helper_disable_unused_functions(struct drm_device *dev)
232{
233 struct drm_encoder *encoder;
Dave Airliea3a05442009-08-31 15:16:30 +1000234 struct drm_connector *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800235 struct drm_crtc *crtc;
236
Dave Airliea3a05442009-08-31 15:16:30 +1000237 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
Dave Airlief453ba02008-11-07 14:05:41 -0800244 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
Dave Airliea3a05442009-08-31 15:16:30 +1000245 if (!drm_helper_encoder_in_use(encoder)) {
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000246 drm_encoder_disable(encoder);
Dave Airlie9c552dd2009-09-02 14:00:11 +1000247 /* disconnector encoder from any connector */
248 encoder->crtc = NULL;
Dave Airliea3a05442009-08-31 15:16:30 +1000249 }
Dave Airlief453ba02008-11-07 14:05:41 -0800250 }
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) {
Alex Deucher5c8d7172010-06-11 17:04:35 -0400256 if (crtc_funcs->disable)
257 (*crtc_funcs->disable)(crtc);
258 else
259 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
Dave Airlief453ba02008-11-07 14:05:41 -0800260 crtc->fb = NULL;
261 }
262 }
263}
264EXPORT_SYMBOL(drm_helper_disable_unused_functions);
265
Jesse Barnes7bec7562009-02-23 16:09:34 -0800266/**
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 */
273static 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 */
300static void
301drm_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)
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000310 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800311 /* Disable encoders whose CRTC is about to change */
312 if (encoder_funcs->get_crtc &&
313 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000314 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800315 }
316}
317
Dave Airlief453ba02008-11-07 14:05:41 -0800318/**
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 */
334bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
335 struct drm_display_mode *mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500336 int x, int y,
337 struct drm_framebuffer *old_fb)
Dave Airlief453ba02008-11-07 14:05:41 -0800338{
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
Dave Airlief453ba02008-11-07 14:05:41 -0800365 /* 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 }
Jerome Glisse94401062010-07-15 15:43:25 -0400383 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800384
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
Jesse Barnes7bec7562009-02-23 16:09:34 -0800395 drm_crtc_prepare_encoders(dev);
396
Dave Airlief453ba02008-11-07 14:05:41 -0800397 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 */
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000402 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
403 if (!ret)
404 goto done;
Dave Airlief453ba02008-11-07 14:05:41 -0800405
406 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
407
408 if (encoder->crtc != crtc)
409 continue;
410
Jerome Glisse94401062010-07-15 15:43:25 -0400411 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);
Dave Airlief453ba02008-11-07 14:05:41 -0800414 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 */
434done:
435 if (!ret) {
436 crtc->mode = saved_mode;
437 crtc->x = saved_x;
438 crtc->y = saved_y;
439 }
440
441 return ret;
442}
443EXPORT_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 */
463int drm_crtc_helper_set_config(struct drm_mode_set *set)
464{
465 struct drm_device *dev;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200466 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
467 struct drm_encoder *save_encoders, *new_encoder, *encoder;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800468 struct drm_framebuffer *old_fb = NULL;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100469 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 */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200471 struct drm_connector *save_connectors, *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800472 int count = 0, ro, fail = 0;
473 struct drm_crtc_helper_funcs *crtc_funcs;
474 int ret = 0;
475
Zhao Yakui58367ed2009-07-20 13:48:07 +0800476 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800477
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
Jerome Glisse94401062010-07-15 15:43:25 -0400489 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 }
Dave Airlief453ba02008-11-07 14:05:41 -0800498
499 dev = set->crtc->dev;
500
Maarten Maathuise67aae72009-08-27 10:18:29 +0200501 /* 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);
Dave Airlief453ba02008-11-07 14:05:41 -0800505 if (!save_crtcs)
506 return -ENOMEM;
507
Maarten Maathuise67aae72009-08-27 10:18:29 +0200508 save_encoders = kzalloc(dev->mode_config.num_encoder *
509 sizeof(struct drm_encoder), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800510 if (!save_encoders) {
511 kfree(save_crtcs);
512 return -ENOMEM;
513 }
514
Maarten Maathuise67aae72009-08-27 10:18:29 +0200515 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
Dave Airlief453ba02008-11-07 14:05:41 -0800542 /* 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) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800545 /* If we have no fb then treat it as a full mode set */
Jesse Barnes7bec7562009-02-23 16:09:34 -0800546 if (set->crtc->fb == NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800547 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800548 mode_changed = true;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100549 } else if (set->fb == NULL) {
550 mode_changed = true;
Dave Airlie8dff4742010-02-11 14:28:58 +1000551 } else
Jesse Barnes712531b2009-01-09 13:56:14 -0800552 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800553 }
554
555 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800556 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800557
558 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800559 DRM_DEBUG_KMS("modes are different, full mode set\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800560 drm_mode_debug_printmodeline(&set->crtc->mode);
561 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800562 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800563 }
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;
Dave Airlief453ba02008-11-07 14:05:41 -0800570 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) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800584 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800585 mode_changed = true;
Maarten Maathuisff846ab2009-08-19 00:56:45 +0200586 /* If the encoder is reused for another connector, then
587 * the appropriate crtc will be set later.
588 */
Maarten Maathuisff6fdbe2009-09-01 03:39:04 +0200589 if (connector->encoder)
590 connector->encoder->crtc = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800591 connector->encoder = new_encoder;
592 }
593 }
594
595 if (fail) {
596 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200597 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800598 }
599
600 count = 0;
601 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
602 if (!connector->encoder)
603 continue;
604
Dave Airlief453ba02008-11-07 14:05:41 -0800605 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 }
Jesse Barnes7bec7562009-02-23 16:09:34 -0800614
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;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200619 goto fail;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800620 }
Dave Airlief453ba02008-11-07 14:05:41 -0800621 if (new_crtc != connector->encoder->crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800622 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800623 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800624 connector->encoder->crtc = new_crtc;
625 }
Jerome Glisse94401062010-07-15 15:43:25 -0400626 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 }
Dave Airlief453ba02008-11-07 14:05:41 -0800634 }
635
636 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800637 if (fb_changed && !crtc_funcs->mode_set_base)
638 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800639
Jesse Barnes712531b2009-01-09 13:56:14 -0800640 if (mode_changed) {
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500641 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800642 set->crtc->fb = set->fb;
643 set->crtc->enabled = (set->mode != NULL);
644 if (set->mode != NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800645 DRM_DEBUG_KMS("attempting to set mode from"
646 " userspace\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800647 drm_mode_debug_printmodeline(set->mode);
648 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500649 set->x, set->y,
650 old_fb)) {
Jerome Glisse94401062010-07-15 15:43:25 -0400651 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
652 set->crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800653 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200654 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800655 }
Dave Airlief453ba02008-11-07 14:05:41 -0800656 }
657 drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800658 } else if (fb_changed) {
Ben Skeggs9b1596a2009-09-18 10:43:52 +1000659 set->crtc->x = set->x;
660 set->crtc->y = set->y;
661
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500662 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800663 if (set->crtc->fb != set->fb)
664 set->crtc->fb = set->fb;
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000665 ret = crtc_funcs->mode_set_base(set->crtc,
666 set->x, set->y, old_fb);
667 if (ret != 0)
Maarten Maathuise67aae72009-08-27 10:18:29 +0200668 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800669 }
670
Maarten Maathuise67aae72009-08-27 10:18:29 +0200671 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800672 kfree(save_encoders);
673 kfree(save_crtcs);
674 return 0;
675
Maarten Maathuise67aae72009-08-27 10:18:29 +0200676fail:
677 /* Restore all previous data. */
Dave Airlief453ba02008-11-07 14:05:41 -0800678 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200679 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
680 *crtc = save_crtcs[count++];
681 }
Chris Wilsone62fb642009-02-11 16:39:21 +0000682
Maarten Maathuise67aae72009-08-27 10:18:29 +0200683 count = 0;
684 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
685 *encoder = save_encoders[count++];
Chris Wilsone62fb642009-02-11 16:39:21 +0000686 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200687
Dave Airlief453ba02008-11-07 14:05:41 -0800688 count = 0;
689 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200690 *connector = save_connectors[count++];
Dave Airlief453ba02008-11-07 14:05:41 -0800691 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200692
693 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800694 kfree(save_encoders);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200695 kfree(save_crtcs);
Dave Airlief453ba02008-11-07 14:05:41 -0800696 return ret;
697}
698EXPORT_SYMBOL(drm_crtc_helper_set_config);
699
Keith Packardc9fb15f2009-05-30 20:42:28 -0700700static 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
713static 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 */
734void 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}
780EXPORT_SYMBOL(drm_helper_connector_dpms);
781
Dave Airlief453ba02008-11-07 14:05:41 -0800782int 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}
793EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
794
795int drm_helper_resume_force_mode(struct drm_device *dev)
796{
797 struct drm_crtc *crtc;
David John89347bb2009-12-31 12:00:46 +0530798 struct drm_encoder *encoder;
799 struct drm_encoder_helper_funcs *encoder_funcs;
800 struct drm_crtc_helper_funcs *crtc_funcs;
Dave Airlief453ba02008-11-07 14:05:41 -0800801 int ret;
802
803 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
804
805 if (!crtc->enabled)
806 continue;
807
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500808 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
809 crtc->x, crtc->y, crtc->fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800810
811 if (ret == false)
812 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
David John89347bb2009-12-31 12:00:46 +0530813
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));
David John89347bb2009-12-31 12:00:46 +0530825 }
Chris Wilson817e6312010-08-06 15:03:31 +0100826
827 crtc_funcs = crtc->helper_private;
828 if (crtc_funcs->dpms)
829 (*crtc_funcs->dpms) (crtc,
830 drm_helper_choose_crtc_dpms(crtc));
David John89347bb2009-12-31 12:00:46 +0530831 }
Dave Airlief453ba02008-11-07 14:05:41 -0800832 }
Zhao Yakuiaf4fcb52009-07-08 14:13:13 +0800833 /* disable the unused connectors while restoring the modesetting */
834 drm_helper_disable_unused_functions(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800835 return 0;
836}
837EXPORT_SYMBOL(drm_helper_resume_force_mode);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000838
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000839#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
Tejun Heo991ea752010-07-20 22:09:02 +0200840static void output_poll_execute(struct work_struct *work)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000841{
Tejun Heo991ea752010-07-20 22:09:02 +0200842 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);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000844 struct drm_connector *connector;
845 enum drm_connector_status old_status, status;
846 bool repoll = false, changed = false;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000847
Chris Wilsone58f6372010-08-20 09:13:36 +0100848 if (!drm_kms_helper_poll)
849 return;
850
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000851 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
Tejun Heo9a919c42010-08-09 12:01:27 +0200884 if (repoll)
885 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000886}
887
Dave Airliefbf81762010-06-01 09:09:06 +1000888void drm_kms_helper_poll_disable(struct drm_device *dev)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000889{
Dave Airliefbf81762010-06-01 09:09:06 +1000890 if (!dev->mode_config.poll_enabled)
891 return;
Tejun Heo991ea752010-07-20 22:09:02 +0200892 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
Dave Airliefbf81762010-06-01 09:09:06 +1000893}
894EXPORT_SYMBOL(drm_kms_helper_poll_disable);
895
896void drm_kms_helper_poll_enable(struct drm_device *dev)
897{
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000898 bool poll = false;
Dave Airliefbf81762010-06-01 09:09:06 +1000899 struct drm_connector *connector;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000900
Chris Wilsone58f6372010-08-20 09:13:36 +0100901 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
902 return;
903
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000904 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
905 if (connector->polled)
906 poll = true;
907 }
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000908
Tejun Heo9a919c42010-08-09 12:01:27 +0200909 if (poll)
910 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000911}
Dave Airliefbf81762010-06-01 09:09:06 +1000912EXPORT_SYMBOL(drm_kms_helper_poll_enable);
913
914void drm_kms_helper_poll_init(struct drm_device *dev)
915{
Tejun Heo991ea752010-07-20 22:09:02 +0200916 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
Dave Airliefbf81762010-06-01 09:09:06 +1000917 dev->mode_config.poll_enabled = true;
918
919 drm_kms_helper_poll_enable(dev);
920}
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000921EXPORT_SYMBOL(drm_kms_helper_poll_init);
922
923void drm_kms_helper_poll_fini(struct drm_device *dev)
924{
Dave Airliefbf81762010-06-01 09:09:06 +1000925 drm_kms_helper_poll_disable(dev);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000926}
927EXPORT_SYMBOL(drm_kms_helper_poll_fini);
928
929void drm_helper_hpd_irq_event(struct drm_device *dev)
930{
931 if (!dev->mode_config.poll_enabled)
932 return;
Chris Wilsone58f6372010-08-20 09:13:36 +0100933
Tejun Heo991ea752010-07-20 22:09:02 +0200934 /* kill timer and schedule immediate execution, this doesn't block */
935 cancel_delayed_work(&dev->mode_config.output_poll_work);
Chris Wilsone58f6372010-08-20 09:13:36 +0100936 if (drm_kms_helper_poll)
937 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000938}
939EXPORT_SYMBOL(drm_helper_hpd_irq_event);