blob: f7af91cb273d58232d41c68b712b2d6d4404671c [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 {
Chris Wilson930a9e22010-09-14 11:07:23 +0100106 connector->status = connector->funcs->detect(connector, true);
Chris Wilson551402a2010-09-06 23:53:47 +0100107 drm_kms_helper_poll_enable(dev);
Chris Wilsone58f6372010-08-20 09:13:36 +0100108 }
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);
Chris Wilsonc7ef35a2010-09-05 16:55:25 +0100118 if (count == 0 && connector->status == connector_status_connected)
Adam Jackson9632b412009-11-23 14:23:07 -0500119 count = drm_add_modes_noedid(connector, 1024, 768);
Chris Wilsonc7ef35a2010-09-05 16:55:25 +0100120 if (count == 0)
121 goto prune;
Dave Airlief453ba02008-11-07 14:05:41 -0800122
Jesse Barnes40a518d2009-01-12 12:05:32 -0800123 drm_mode_connector_list_update(connector);
Dave Airlief453ba02008-11-07 14:05:41 -0800124
125 if (maxX && maxY)
126 drm_mode_validate_size(dev, &connector->modes, maxX,
127 maxY, 0);
yakui_zhao67149772009-04-02 11:52:12 +0800128
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
Dave Airlief453ba02008-11-07 14:05:41 -0800135 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
Adam Jackson620f3782009-09-08 11:51:46 +1000141prune:
Dave Airlief453ba02008-11-07 14:05:41 -0800142 drm_mode_prune_invalid(dev, &connector->modes, true);
143
Jesse Barnes40a518d2009-01-12 12:05:32 -0800144 if (list_empty(&connector->modes))
145 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800146
147 drm_mode_sort(&connector->modes);
148
Jerome Glisse94401062010-07-15 15:43:25 -0400149 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
150 drm_get_connector_name(connector));
Dave Airlief453ba02008-11-07 14:05:41 -0800151 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 }
Jesse Barnes40a518d2009-01-12 12:05:32 -0800157
158 return count;
Dave Airlief453ba02008-11-07 14:05:41 -0800159}
160EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
161
Dave Airlief453ba02008-11-07 14:05:41 -0800162/**
Keith Packardc9fb15f2009-05-30 20:42:28 -0700163 * 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 */
174bool 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}
183EXPORT_SYMBOL(drm_helper_encoder_in_use);
184
185/**
Dave Airlief453ba02008-11-07 14:05:41 -0800186 * 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 */
197bool 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)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700203 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
Dave Airlief453ba02008-11-07 14:05:41 -0800204 return true;
205 return false;
206}
207EXPORT_SYMBOL(drm_helper_crtc_in_use);
208
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000209static void
210drm_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
Dave Airlief453ba02008-11-07 14:05:41 -0800220/**
David John89347bb2009-12-31 12:00:46 +0530221 * drm_helper_disable_unused_functions - disable unused objects
Dave Airlief453ba02008-11-07 14:05:41 -0800222 * @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 */
230void drm_helper_disable_unused_functions(struct drm_device *dev)
231{
232 struct drm_encoder *encoder;
Dave Airliea3a05442009-08-31 15:16:30 +1000233 struct drm_connector *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800234 struct drm_crtc *crtc;
235
Dave Airliea3a05442009-08-31 15:16:30 +1000236 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
Dave Airlief453ba02008-11-07 14:05:41 -0800243 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
Dave Airliea3a05442009-08-31 15:16:30 +1000244 if (!drm_helper_encoder_in_use(encoder)) {
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000245 drm_encoder_disable(encoder);
Dave Airlie9c552dd2009-09-02 14:00:11 +1000246 /* disconnector encoder from any connector */
247 encoder->crtc = NULL;
Dave Airliea3a05442009-08-31 15:16:30 +1000248 }
Dave Airlief453ba02008-11-07 14:05:41 -0800249 }
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) {
Alex Deucher5c8d7172010-06-11 17:04:35 -0400255 if (crtc_funcs->disable)
256 (*crtc_funcs->disable)(crtc);
257 else
258 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
Dave Airlief453ba02008-11-07 14:05:41 -0800259 crtc->fb = NULL;
260 }
261 }
262}
263EXPORT_SYMBOL(drm_helper_disable_unused_functions);
264
Jesse Barnes7bec7562009-02-23 16:09:34 -0800265/**
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 */
272static 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
Joe Perchesfce7d612010-10-30 21:08:30 +0000279 WARN(!crtc, "checking null crtc?\n");
Jesse Barnes7bec7562009-02-23 16:09:34 -0800280
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 */
299static void
300drm_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)
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000309 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800310 /* Disable encoders whose CRTC is about to change */
311 if (encoder_funcs->get_crtc &&
312 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000313 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800314 }
315}
316
Dave Airlief453ba02008-11-07 14:05:41 -0800317/**
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 */
333bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
334 struct drm_display_mode *mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500335 int x, int y,
336 struct drm_framebuffer *old_fb)
Dave Airlief453ba02008-11-07 14:05:41 -0800337{
338 struct drm_device *dev = crtc->dev;
339 struct drm_display_mode *adjusted_mode, saved_mode;
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
346 adjusted_mode = drm_mode_duplicate(dev, mode);
347
348 crtc->enabled = drm_helper_crtc_in_use(crtc);
349
350 if (!crtc->enabled)
351 return true;
352
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
Dave Airlief453ba02008-11-07 14:05:41 -0800364 /* 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 }
Jerome Glisse94401062010-07-15 15:43:25 -0400382 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800383
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
Jesse Barnes7bec7562009-02-23 16:09:34 -0800394 drm_crtc_prepare_encoders(dev);
395
Dave Airlief453ba02008-11-07 14:05:41 -0800396 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 */
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000401 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
402 if (!ret)
403 goto done;
Dave Airlief453ba02008-11-07 14:05:41 -0800404
405 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
406
407 if (encoder->crtc != crtc)
408 continue;
409
Jerome Glisse94401062010-07-15 15:43:25 -0400410 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);
Dave Airlief453ba02008-11-07 14:05:41 -0800413 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
430 /* XXX free adjustedmode */
431 drm_mode_destroy(dev, adjusted_mode);
432 /* FIXME: add subpixel order */
433done:
434 if (!ret) {
435 crtc->mode = saved_mode;
436 crtc->x = saved_x;
437 crtc->y = saved_y;
438 }
439
440 return ret;
441}
442EXPORT_SYMBOL(drm_crtc_helper_set_mode);
443
444
445/**
446 * drm_crtc_helper_set_config - set a new config from userspace
447 * @crtc: CRTC to setup
448 * @crtc_info: user provided configuration
449 * @new_mode: new mode to set
450 * @connector_set: set of connectors for the new config
451 * @fb: new framebuffer
452 *
453 * LOCKING:
454 * Caller must hold mode config lock.
455 *
456 * Setup a new configuration, provided by the user in @crtc_info, and enable
457 * it.
458 *
459 * RETURNS:
460 * Zero. (FIXME)
461 */
462int drm_crtc_helper_set_config(struct drm_mode_set *set)
463{
464 struct drm_device *dev;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200465 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
466 struct drm_encoder *save_encoders, *new_encoder, *encoder;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800467 struct drm_framebuffer *old_fb = NULL;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100468 bool mode_changed = false; /* if true do a full mode set */
469 bool fb_changed = false; /* if true and !mode_changed just do a flip */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200470 struct drm_connector *save_connectors, *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800471 int count = 0, ro, fail = 0;
472 struct drm_crtc_helper_funcs *crtc_funcs;
473 int ret = 0;
474
Zhao Yakui58367ed2009-07-20 13:48:07 +0800475 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800476
477 if (!set)
478 return -EINVAL;
479
480 if (!set->crtc)
481 return -EINVAL;
482
483 if (!set->crtc->helper_private)
484 return -EINVAL;
485
486 crtc_funcs = set->crtc->helper_private;
487
Jerome Glisse94401062010-07-15 15:43:25 -0400488 if (set->fb) {
489 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
490 set->crtc->base.id, set->fb->base.id,
491 (int)set->num_connectors, set->x, set->y);
492 } else {
493 DRM_DEBUG_KMS("[CRTC:%d] [NOFB] #connectors=%d (x y) (%i %i)\n",
494 set->crtc->base.id, (int)set->num_connectors,
495 set->x, set->y);
496 }
Dave Airlief453ba02008-11-07 14:05:41 -0800497
498 dev = set->crtc->dev;
499
Maarten Maathuise67aae72009-08-27 10:18:29 +0200500 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
501 * connector data. */
502 save_crtcs = kzalloc(dev->mode_config.num_crtc *
503 sizeof(struct drm_crtc), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800504 if (!save_crtcs)
505 return -ENOMEM;
506
Maarten Maathuise67aae72009-08-27 10:18:29 +0200507 save_encoders = kzalloc(dev->mode_config.num_encoder *
508 sizeof(struct drm_encoder), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800509 if (!save_encoders) {
510 kfree(save_crtcs);
511 return -ENOMEM;
512 }
513
Maarten Maathuise67aae72009-08-27 10:18:29 +0200514 save_connectors = kzalloc(dev->mode_config.num_connector *
515 sizeof(struct drm_connector), GFP_KERNEL);
516 if (!save_connectors) {
517 kfree(save_crtcs);
518 kfree(save_encoders);
519 return -ENOMEM;
520 }
521
522 /* Copy data. Note that driver private data is not affected.
523 * Should anything bad happen only the expected state is
524 * restored, not the drivers personal bookkeeping.
525 */
526 count = 0;
527 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
528 save_crtcs[count++] = *crtc;
529 }
530
531 count = 0;
532 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
533 save_encoders[count++] = *encoder;
534 }
535
536 count = 0;
537 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
538 save_connectors[count++] = *connector;
539 }
540
Dave Airlief453ba02008-11-07 14:05:41 -0800541 /* We should be able to check here if the fb has the same properties
542 * and then just flip_or_move it */
543 if (set->crtc->fb != set->fb) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800544 /* If we have no fb then treat it as a full mode set */
Jesse Barnes7bec7562009-02-23 16:09:34 -0800545 if (set->crtc->fb == NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800546 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800547 mode_changed = true;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100548 } else if (set->fb == NULL) {
549 mode_changed = true;
Dave Airlie8dff4742010-02-11 14:28:58 +1000550 } else
Jesse Barnes712531b2009-01-09 13:56:14 -0800551 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800552 }
553
554 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800555 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800556
557 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800558 DRM_DEBUG_KMS("modes are different, full mode set\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800559 drm_mode_debug_printmodeline(&set->crtc->mode);
560 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800561 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800562 }
563
564 /* a) traverse passed in connector list and get encoders for them */
565 count = 0;
566 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
567 struct drm_connector_helper_funcs *connector_funcs =
568 connector->helper_private;
Dave Airlief453ba02008-11-07 14:05:41 -0800569 new_encoder = connector->encoder;
570 for (ro = 0; ro < set->num_connectors; ro++) {
571 if (set->connectors[ro] == connector) {
572 new_encoder = connector_funcs->best_encoder(connector);
573 /* if we can't get an encoder for a connector
574 we are setting now - then fail */
575 if (new_encoder == NULL)
576 /* don't break so fail path works correct */
577 fail = 1;
578 break;
579 }
580 }
581
582 if (new_encoder != connector->encoder) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800583 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800584 mode_changed = true;
Maarten Maathuisff846ab2009-08-19 00:56:45 +0200585 /* If the encoder is reused for another connector, then
586 * the appropriate crtc will be set later.
587 */
Maarten Maathuisff6fdbe2009-09-01 03:39:04 +0200588 if (connector->encoder)
589 connector->encoder->crtc = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800590 connector->encoder = new_encoder;
591 }
592 }
593
594 if (fail) {
595 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200596 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800597 }
598
599 count = 0;
600 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
601 if (!connector->encoder)
602 continue;
603
Dave Airlief453ba02008-11-07 14:05:41 -0800604 if (connector->encoder->crtc == set->crtc)
605 new_crtc = NULL;
606 else
607 new_crtc = connector->encoder->crtc;
608
609 for (ro = 0; ro < set->num_connectors; ro++) {
610 if (set->connectors[ro] == connector)
611 new_crtc = set->crtc;
612 }
Jesse Barnes7bec7562009-02-23 16:09:34 -0800613
614 /* Make sure the new CRTC will work with the encoder */
615 if (new_crtc &&
616 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
617 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200618 goto fail;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800619 }
Dave Airlief453ba02008-11-07 14:05:41 -0800620 if (new_crtc != connector->encoder->crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800621 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800622 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800623 connector->encoder->crtc = new_crtc;
624 }
Jerome Glisse94401062010-07-15 15:43:25 -0400625 if (new_crtc) {
626 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
627 connector->base.id, drm_get_connector_name(connector),
628 new_crtc->base.id);
629 } else {
630 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
631 connector->base.id, drm_get_connector_name(connector));
632 }
Dave Airlief453ba02008-11-07 14:05:41 -0800633 }
634
635 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800636 if (fb_changed && !crtc_funcs->mode_set_base)
637 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800638
Jesse Barnes712531b2009-01-09 13:56:14 -0800639 if (mode_changed) {
Dave Airlief453ba02008-11-07 14:05:41 -0800640 set->crtc->enabled = (set->mode != NULL);
641 if (set->mode != NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800642 DRM_DEBUG_KMS("attempting to set mode from"
643 " userspace\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800644 drm_mode_debug_printmodeline(set->mode);
Chris Wilson356ad3c2010-09-09 09:41:32 +0100645 old_fb = set->crtc->fb;
646 set->crtc->fb = set->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800647 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500648 set->x, set->y,
649 old_fb)) {
Jerome Glisse94401062010-07-15 15:43:25 -0400650 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
651 set->crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800652 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200653 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800654 }
Dave Airlief453ba02008-11-07 14:05:41 -0800655 }
656 drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800657 } else if (fb_changed) {
Ben Skeggs9b1596a2009-09-18 10:43:52 +1000658 set->crtc->x = set->x;
659 set->crtc->y = set->y;
660
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500661 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800662 if (set->crtc->fb != set->fb)
663 set->crtc->fb = set->fb;
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000664 ret = crtc_funcs->mode_set_base(set->crtc,
665 set->x, set->y, old_fb);
666 if (ret != 0)
Maarten Maathuise67aae72009-08-27 10:18:29 +0200667 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800668 }
669
Maarten Maathuise67aae72009-08-27 10:18:29 +0200670 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800671 kfree(save_encoders);
672 kfree(save_crtcs);
673 return 0;
674
Maarten Maathuise67aae72009-08-27 10:18:29 +0200675fail:
676 /* Restore all previous data. */
Dave Airlief453ba02008-11-07 14:05:41 -0800677 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200678 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
679 *crtc = save_crtcs[count++];
680 }
Chris Wilsone62fb642009-02-11 16:39:21 +0000681
Maarten Maathuise67aae72009-08-27 10:18:29 +0200682 count = 0;
683 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
684 *encoder = save_encoders[count++];
Chris Wilsone62fb642009-02-11 16:39:21 +0000685 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200686
Dave Airlief453ba02008-11-07 14:05:41 -0800687 count = 0;
688 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200689 *connector = save_connectors[count++];
Dave Airlief453ba02008-11-07 14:05:41 -0800690 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200691
692 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800693 kfree(save_encoders);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200694 kfree(save_crtcs);
Dave Airlief453ba02008-11-07 14:05:41 -0800695 return ret;
696}
697EXPORT_SYMBOL(drm_crtc_helper_set_config);
698
Keith Packardc9fb15f2009-05-30 20:42:28 -0700699static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
700{
701 int dpms = DRM_MODE_DPMS_OFF;
702 struct drm_connector *connector;
703 struct drm_device *dev = encoder->dev;
704
705 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
706 if (connector->encoder == encoder)
707 if (connector->dpms < dpms)
708 dpms = connector->dpms;
709 return dpms;
710}
711
712static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
713{
714 int dpms = DRM_MODE_DPMS_OFF;
715 struct drm_connector *connector;
716 struct drm_device *dev = crtc->dev;
717
718 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
719 if (connector->encoder && connector->encoder->crtc == crtc)
720 if (connector->dpms < dpms)
721 dpms = connector->dpms;
722 return dpms;
723}
724
725/**
726 * drm_helper_connector_dpms
727 * @connector affected connector
728 * @mode DPMS mode
729 *
730 * Calls the low-level connector DPMS function, then
731 * calls appropriate encoder and crtc DPMS functions as well
732 */
733void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
734{
735 struct drm_encoder *encoder = connector->encoder;
736 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
737 int old_dpms;
738
739 if (mode == connector->dpms)
740 return;
741
742 old_dpms = connector->dpms;
743 connector->dpms = mode;
744
745 /* from off to on, do crtc then encoder */
746 if (mode < old_dpms) {
747 if (crtc) {
748 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
749 if (crtc_funcs->dpms)
750 (*crtc_funcs->dpms) (crtc,
751 drm_helper_choose_crtc_dpms(crtc));
752 }
753 if (encoder) {
754 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
755 if (encoder_funcs->dpms)
756 (*encoder_funcs->dpms) (encoder,
757 drm_helper_choose_encoder_dpms(encoder));
758 }
759 }
760
761 /* from on to off, do encoder then crtc */
762 if (mode > old_dpms) {
763 if (encoder) {
764 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
765 if (encoder_funcs->dpms)
766 (*encoder_funcs->dpms) (encoder,
767 drm_helper_choose_encoder_dpms(encoder));
768 }
769 if (crtc) {
770 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
771 if (crtc_funcs->dpms)
772 (*crtc_funcs->dpms) (crtc,
773 drm_helper_choose_crtc_dpms(crtc));
774 }
775 }
776
777 return;
778}
779EXPORT_SYMBOL(drm_helper_connector_dpms);
780
Dave Airlief453ba02008-11-07 14:05:41 -0800781int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
782 struct drm_mode_fb_cmd *mode_cmd)
783{
784 fb->width = mode_cmd->width;
785 fb->height = mode_cmd->height;
786 fb->pitch = mode_cmd->pitch;
787 fb->bits_per_pixel = mode_cmd->bpp;
788 fb->depth = mode_cmd->depth;
789
790 return 0;
791}
792EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
793
794int drm_helper_resume_force_mode(struct drm_device *dev)
795{
796 struct drm_crtc *crtc;
David John89347bb2009-12-31 12:00:46 +0530797 struct drm_encoder *encoder;
798 struct drm_encoder_helper_funcs *encoder_funcs;
799 struct drm_crtc_helper_funcs *crtc_funcs;
Dave Airlief453ba02008-11-07 14:05:41 -0800800 int ret;
801
802 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
803
804 if (!crtc->enabled)
805 continue;
806
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500807 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
808 crtc->x, crtc->y, crtc->fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800809
810 if (ret == false)
811 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
David John89347bb2009-12-31 12:00:46 +0530812
813 /* Turn off outputs that were already powered off */
814 if (drm_helper_choose_crtc_dpms(crtc)) {
815 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
816
817 if(encoder->crtc != crtc)
818 continue;
819
820 encoder_funcs = encoder->helper_private;
821 if (encoder_funcs->dpms)
822 (*encoder_funcs->dpms) (encoder,
823 drm_helper_choose_encoder_dpms(encoder));
David John89347bb2009-12-31 12:00:46 +0530824 }
Chris Wilson817e6312010-08-06 15:03:31 +0100825
826 crtc_funcs = crtc->helper_private;
827 if (crtc_funcs->dpms)
828 (*crtc_funcs->dpms) (crtc,
829 drm_helper_choose_crtc_dpms(crtc));
David John89347bb2009-12-31 12:00:46 +0530830 }
Dave Airlief453ba02008-11-07 14:05:41 -0800831 }
Zhao Yakuiaf4fcb52009-07-08 14:13:13 +0800832 /* disable the unused connectors while restoring the modesetting */
833 drm_helper_disable_unused_functions(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800834 return 0;
835}
836EXPORT_SYMBOL(drm_helper_resume_force_mode);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000837
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000838#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
Tejun Heo991ea752010-07-20 22:09:02 +0200839static void output_poll_execute(struct work_struct *work)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000840{
Tejun Heo991ea752010-07-20 22:09:02 +0200841 struct delayed_work *delayed_work = to_delayed_work(work);
842 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000843 struct drm_connector *connector;
844 enum drm_connector_status old_status, status;
845 bool repoll = false, changed = false;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000846
Chris Wilsone58f6372010-08-20 09:13:36 +0100847 if (!drm_kms_helper_poll)
848 return;
849
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000850 mutex_lock(&dev->mode_config.mutex);
851 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
852
853 /* if this is HPD or polled don't check it -
854 TV out for instance */
855 if (!connector->polled)
856 continue;
857
858 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
859 repoll = true;
860
861 old_status = connector->status;
862 /* if we are connected and don't want to poll for disconnect
863 skip it */
864 if (old_status == connector_status_connected &&
865 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
866 !(connector->polled & DRM_CONNECTOR_POLL_HPD))
867 continue;
868
Chris Wilson930a9e22010-09-14 11:07:23 +0100869 status = connector->funcs->detect(connector, false);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000870 if (old_status != status)
871 changed = true;
872 }
873
874 mutex_unlock(&dev->mode_config.mutex);
875
876 if (changed) {
877 /* send a uevent + call fbdev */
878 drm_sysfs_hotplug_event(dev);
879 if (dev->mode_config.funcs->output_poll_changed)
880 dev->mode_config.funcs->output_poll_changed(dev);
881 }
882
Tejun Heo9a919c42010-08-09 12:01:27 +0200883 if (repoll)
884 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000885}
886
Dave Airliefbf81762010-06-01 09:09:06 +1000887void drm_kms_helper_poll_disable(struct drm_device *dev)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000888{
Dave Airliefbf81762010-06-01 09:09:06 +1000889 if (!dev->mode_config.poll_enabled)
890 return;
Tejun Heo991ea752010-07-20 22:09:02 +0200891 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
Dave Airliefbf81762010-06-01 09:09:06 +1000892}
893EXPORT_SYMBOL(drm_kms_helper_poll_disable);
894
895void drm_kms_helper_poll_enable(struct drm_device *dev)
896{
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000897 bool poll = false;
Dave Airliefbf81762010-06-01 09:09:06 +1000898 struct drm_connector *connector;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000899
Chris Wilsone58f6372010-08-20 09:13:36 +0100900 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
901 return;
902
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000903 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
904 if (connector->polled)
905 poll = true;
906 }
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000907
Tejun Heo9a919c42010-08-09 12:01:27 +0200908 if (poll)
909 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000910}
Dave Airliefbf81762010-06-01 09:09:06 +1000911EXPORT_SYMBOL(drm_kms_helper_poll_enable);
912
913void drm_kms_helper_poll_init(struct drm_device *dev)
914{
Tejun Heo991ea752010-07-20 22:09:02 +0200915 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
Dave Airliefbf81762010-06-01 09:09:06 +1000916 dev->mode_config.poll_enabled = true;
917
918 drm_kms_helper_poll_enable(dev);
919}
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000920EXPORT_SYMBOL(drm_kms_helper_poll_init);
921
922void drm_kms_helper_poll_fini(struct drm_device *dev)
923{
Dave Airliefbf81762010-06-01 09:09:06 +1000924 drm_kms_helper_poll_disable(dev);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000925}
926EXPORT_SYMBOL(drm_kms_helper_poll_fini);
927
928void drm_helper_hpd_irq_event(struct drm_device *dev)
929{
930 if (!dev->mode_config.poll_enabled)
931 return;
Chris Wilsone58f6372010-08-20 09:13:36 +0100932
Tejun Heo991ea752010-07-20 22:09:02 +0200933 /* kill timer and schedule immediate execution, this doesn't block */
934 cancel_delayed_work(&dev->mode_config.output_poll_work);
Chris Wilsone58f6372010-08-20 09:13:36 +0100935 if (drm_kms_helper_poll)
936 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000937}
938EXPORT_SYMBOL(drm_helper_hpd_irq_event);