blob: 952b3d4fb2a68fcdbc7e9062a723e9a1c383e3a3 [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 Airlie929710212010-12-21 12:47:56 +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;
Mario Kleiner27641c32010-10-23 04:20:23 +0200339 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800340 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
Mario Kleiner27641c32010-10-23 04:20:23 +0200353 saved_hwmode = crtc->hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800354 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
Mario Kleiner27641c32010-10-23 04:20:23 +0200431 /* Store real post-adjustment hardware mode. */
432 crtc->hwmode = *adjusted_mode;
433
434 /* Calculate and store various constants which
435 * are later needed by vblank and swap-completion
436 * timestamping. They are derived from true hwmode.
437 */
438 drm_calc_timestamping_constants(crtc);
439
Dave Airlief453ba02008-11-07 14:05:41 -0800440 /* XXX free adjustedmode */
441 drm_mode_destroy(dev, adjusted_mode);
442 /* FIXME: add subpixel order */
443done:
444 if (!ret) {
Mario Kleiner27641c32010-10-23 04:20:23 +0200445 crtc->hwmode = saved_hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800446 crtc->mode = saved_mode;
447 crtc->x = saved_x;
448 crtc->y = saved_y;
449 }
450
451 return ret;
452}
453EXPORT_SYMBOL(drm_crtc_helper_set_mode);
454
455
456/**
457 * drm_crtc_helper_set_config - set a new config from userspace
458 * @crtc: CRTC to setup
459 * @crtc_info: user provided configuration
460 * @new_mode: new mode to set
461 * @connector_set: set of connectors for the new config
462 * @fb: new framebuffer
463 *
464 * LOCKING:
465 * Caller must hold mode config lock.
466 *
467 * Setup a new configuration, provided by the user in @crtc_info, and enable
468 * it.
469 *
470 * RETURNS:
471 * Zero. (FIXME)
472 */
473int drm_crtc_helper_set_config(struct drm_mode_set *set)
474{
475 struct drm_device *dev;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200476 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
477 struct drm_encoder *save_encoders, *new_encoder, *encoder;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800478 struct drm_framebuffer *old_fb = NULL;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100479 bool mode_changed = false; /* if true do a full mode set */
480 bool fb_changed = false; /* if true and !mode_changed just do a flip */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200481 struct drm_connector *save_connectors, *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800482 int count = 0, ro, fail = 0;
483 struct drm_crtc_helper_funcs *crtc_funcs;
484 int ret = 0;
Keith Packardbf9dc102010-11-26 10:45:58 -0800485 int i;
Dave Airlief453ba02008-11-07 14:05:41 -0800486
Zhao Yakui58367ed2009-07-20 13:48:07 +0800487 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800488
489 if (!set)
490 return -EINVAL;
491
492 if (!set->crtc)
493 return -EINVAL;
494
495 if (!set->crtc->helper_private)
496 return -EINVAL;
497
498 crtc_funcs = set->crtc->helper_private;
499
Jerome Glisse94401062010-07-15 15:43:25 -0400500 if (set->fb) {
501 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
502 set->crtc->base.id, set->fb->base.id,
503 (int)set->num_connectors, set->x, set->y);
504 } else {
505 DRM_DEBUG_KMS("[CRTC:%d] [NOFB] #connectors=%d (x y) (%i %i)\n",
506 set->crtc->base.id, (int)set->num_connectors,
507 set->x, set->y);
508 }
Dave Airlief453ba02008-11-07 14:05:41 -0800509
510 dev = set->crtc->dev;
511
Maarten Maathuise67aae72009-08-27 10:18:29 +0200512 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
513 * connector data. */
514 save_crtcs = kzalloc(dev->mode_config.num_crtc *
515 sizeof(struct drm_crtc), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800516 if (!save_crtcs)
517 return -ENOMEM;
518
Maarten Maathuise67aae72009-08-27 10:18:29 +0200519 save_encoders = kzalloc(dev->mode_config.num_encoder *
520 sizeof(struct drm_encoder), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800521 if (!save_encoders) {
522 kfree(save_crtcs);
523 return -ENOMEM;
524 }
525
Maarten Maathuise67aae72009-08-27 10:18:29 +0200526 save_connectors = kzalloc(dev->mode_config.num_connector *
527 sizeof(struct drm_connector), GFP_KERNEL);
528 if (!save_connectors) {
529 kfree(save_crtcs);
530 kfree(save_encoders);
531 return -ENOMEM;
532 }
533
534 /* Copy data. Note that driver private data is not affected.
535 * Should anything bad happen only the expected state is
536 * restored, not the drivers personal bookkeeping.
537 */
538 count = 0;
539 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
540 save_crtcs[count++] = *crtc;
541 }
542
543 count = 0;
544 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
545 save_encoders[count++] = *encoder;
546 }
547
548 count = 0;
549 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
550 save_connectors[count++] = *connector;
551 }
552
Dave Airlief453ba02008-11-07 14:05:41 -0800553 /* We should be able to check here if the fb has the same properties
554 * and then just flip_or_move it */
555 if (set->crtc->fb != set->fb) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800556 /* If we have no fb then treat it as a full mode set */
Jesse Barnes7bec7562009-02-23 16:09:34 -0800557 if (set->crtc->fb == NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800558 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800559 mode_changed = true;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100560 } else if (set->fb == NULL) {
561 mode_changed = true;
Dave Airlie8dff4742010-02-11 14:28:58 +1000562 } else
Jesse Barnes712531b2009-01-09 13:56:14 -0800563 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800564 }
565
566 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800567 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800568
569 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800570 DRM_DEBUG_KMS("modes are different, full mode set\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800571 drm_mode_debug_printmodeline(&set->crtc->mode);
572 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800573 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800574 }
575
576 /* a) traverse passed in connector list and get encoders for them */
577 count = 0;
578 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
579 struct drm_connector_helper_funcs *connector_funcs =
580 connector->helper_private;
Dave Airlief453ba02008-11-07 14:05:41 -0800581 new_encoder = connector->encoder;
582 for (ro = 0; ro < set->num_connectors; ro++) {
583 if (set->connectors[ro] == connector) {
584 new_encoder = connector_funcs->best_encoder(connector);
585 /* if we can't get an encoder for a connector
586 we are setting now - then fail */
587 if (new_encoder == NULL)
588 /* don't break so fail path works correct */
589 fail = 1;
590 break;
591 }
592 }
593
594 if (new_encoder != connector->encoder) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800595 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800596 mode_changed = true;
Maarten Maathuisff846ab2009-08-19 00:56:45 +0200597 /* If the encoder is reused for another connector, then
598 * the appropriate crtc will be set later.
599 */
Maarten Maathuisff6fdbe2009-09-01 03:39:04 +0200600 if (connector->encoder)
601 connector->encoder->crtc = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800602 connector->encoder = new_encoder;
603 }
604 }
605
606 if (fail) {
607 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200608 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800609 }
610
611 count = 0;
612 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
613 if (!connector->encoder)
614 continue;
615
Dave Airlief453ba02008-11-07 14:05:41 -0800616 if (connector->encoder->crtc == set->crtc)
617 new_crtc = NULL;
618 else
619 new_crtc = connector->encoder->crtc;
620
621 for (ro = 0; ro < set->num_connectors; ro++) {
622 if (set->connectors[ro] == connector)
623 new_crtc = set->crtc;
624 }
Jesse Barnes7bec7562009-02-23 16:09:34 -0800625
626 /* Make sure the new CRTC will work with the encoder */
627 if (new_crtc &&
628 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
629 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200630 goto fail;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800631 }
Dave Airlief453ba02008-11-07 14:05:41 -0800632 if (new_crtc != connector->encoder->crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800633 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800634 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800635 connector->encoder->crtc = new_crtc;
636 }
Jerome Glisse94401062010-07-15 15:43:25 -0400637 if (new_crtc) {
638 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
639 connector->base.id, drm_get_connector_name(connector),
640 new_crtc->base.id);
641 } else {
642 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
643 connector->base.id, drm_get_connector_name(connector));
644 }
Dave Airlief453ba02008-11-07 14:05:41 -0800645 }
646
647 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800648 if (fb_changed && !crtc_funcs->mode_set_base)
649 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800650
Jesse Barnes712531b2009-01-09 13:56:14 -0800651 if (mode_changed) {
Dave Airlief453ba02008-11-07 14:05:41 -0800652 set->crtc->enabled = (set->mode != NULL);
653 if (set->mode != NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800654 DRM_DEBUG_KMS("attempting to set mode from"
655 " userspace\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800656 drm_mode_debug_printmodeline(set->mode);
Chris Wilson356ad3c2010-09-09 09:41:32 +0100657 old_fb = set->crtc->fb;
658 set->crtc->fb = set->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800659 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500660 set->x, set->y,
661 old_fb)) {
Jerome Glisse94401062010-07-15 15:43:25 -0400662 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
663 set->crtc->base.id);
Chris Wilson0ba41e42011-01-08 15:10:41 +0000664 set->crtc->fb = old_fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800665 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200666 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800667 }
Dave Airlief453ba02008-11-07 14:05:41 -0800668 }
669 drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800670 } else if (fb_changed) {
Ben Skeggs9b1596a2009-09-18 10:43:52 +1000671 set->crtc->x = set->x;
672 set->crtc->y = set->y;
673
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500674 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800675 if (set->crtc->fb != set->fb)
676 set->crtc->fb = set->fb;
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000677 ret = crtc_funcs->mode_set_base(set->crtc,
678 set->x, set->y, old_fb);
Chris Wilson0ba41e42011-01-08 15:10:41 +0000679 if (ret != 0) {
680 set->crtc->fb = old_fb;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200681 goto fail;
Chris Wilson0ba41e42011-01-08 15:10:41 +0000682 }
Dave Airlief453ba02008-11-07 14:05:41 -0800683 }
Keith Packardbf9dc102010-11-26 10:45:58 -0800684 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
685 for (i = 0; i < set->num_connectors; i++) {
686 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
687 drm_get_connector_name(set->connectors[i]));
688 set->connectors[i]->dpms = DRM_MODE_DPMS_ON;
689 }
Dave Airlief453ba02008-11-07 14:05:41 -0800690
Maarten Maathuise67aae72009-08-27 10:18:29 +0200691 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800692 kfree(save_encoders);
693 kfree(save_crtcs);
694 return 0;
695
Maarten Maathuise67aae72009-08-27 10:18:29 +0200696fail:
697 /* Restore all previous data. */
Dave Airlief453ba02008-11-07 14:05:41 -0800698 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200699 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
700 *crtc = save_crtcs[count++];
701 }
Chris Wilsone62fb642009-02-11 16:39:21 +0000702
Maarten Maathuise67aae72009-08-27 10:18:29 +0200703 count = 0;
704 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
705 *encoder = save_encoders[count++];
Chris Wilsone62fb642009-02-11 16:39:21 +0000706 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200707
Dave Airlief453ba02008-11-07 14:05:41 -0800708 count = 0;
709 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200710 *connector = save_connectors[count++];
Dave Airlief453ba02008-11-07 14:05:41 -0800711 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200712
713 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800714 kfree(save_encoders);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200715 kfree(save_crtcs);
Dave Airlief453ba02008-11-07 14:05:41 -0800716 return ret;
717}
718EXPORT_SYMBOL(drm_crtc_helper_set_config);
719
Keith Packardc9fb15f2009-05-30 20:42:28 -0700720static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
721{
722 int dpms = DRM_MODE_DPMS_OFF;
723 struct drm_connector *connector;
724 struct drm_device *dev = encoder->dev;
725
726 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
727 if (connector->encoder == encoder)
728 if (connector->dpms < dpms)
729 dpms = connector->dpms;
730 return dpms;
731}
732
733static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
734{
735 int dpms = DRM_MODE_DPMS_OFF;
736 struct drm_connector *connector;
737 struct drm_device *dev = crtc->dev;
738
739 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
740 if (connector->encoder && connector->encoder->crtc == crtc)
741 if (connector->dpms < dpms)
742 dpms = connector->dpms;
743 return dpms;
744}
745
746/**
747 * drm_helper_connector_dpms
748 * @connector affected connector
749 * @mode DPMS mode
750 *
751 * Calls the low-level connector DPMS function, then
752 * calls appropriate encoder and crtc DPMS functions as well
753 */
754void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
755{
756 struct drm_encoder *encoder = connector->encoder;
757 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
758 int old_dpms;
759
760 if (mode == connector->dpms)
761 return;
762
763 old_dpms = connector->dpms;
764 connector->dpms = mode;
765
766 /* from off to on, do crtc then encoder */
767 if (mode < old_dpms) {
768 if (crtc) {
769 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
770 if (crtc_funcs->dpms)
771 (*crtc_funcs->dpms) (crtc,
772 drm_helper_choose_crtc_dpms(crtc));
773 }
774 if (encoder) {
775 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
776 if (encoder_funcs->dpms)
777 (*encoder_funcs->dpms) (encoder,
778 drm_helper_choose_encoder_dpms(encoder));
779 }
780 }
781
782 /* from on to off, do encoder then crtc */
783 if (mode > old_dpms) {
784 if (encoder) {
785 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
786 if (encoder_funcs->dpms)
787 (*encoder_funcs->dpms) (encoder,
788 drm_helper_choose_encoder_dpms(encoder));
789 }
790 if (crtc) {
791 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
792 if (crtc_funcs->dpms)
793 (*crtc_funcs->dpms) (crtc,
794 drm_helper_choose_crtc_dpms(crtc));
795 }
796 }
797
798 return;
799}
800EXPORT_SYMBOL(drm_helper_connector_dpms);
801
Dave Airlief453ba02008-11-07 14:05:41 -0800802int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
803 struct drm_mode_fb_cmd *mode_cmd)
804{
805 fb->width = mode_cmd->width;
806 fb->height = mode_cmd->height;
807 fb->pitch = mode_cmd->pitch;
808 fb->bits_per_pixel = mode_cmd->bpp;
809 fb->depth = mode_cmd->depth;
810
811 return 0;
812}
813EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
814
815int drm_helper_resume_force_mode(struct drm_device *dev)
816{
817 struct drm_crtc *crtc;
David John89347bb2009-12-31 12:00:46 +0530818 struct drm_encoder *encoder;
819 struct drm_encoder_helper_funcs *encoder_funcs;
820 struct drm_crtc_helper_funcs *crtc_funcs;
Dave Airlief453ba02008-11-07 14:05:41 -0800821 int ret;
822
823 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
824
825 if (!crtc->enabled)
826 continue;
827
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500828 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
829 crtc->x, crtc->y, crtc->fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800830
831 if (ret == false)
832 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
David John89347bb2009-12-31 12:00:46 +0530833
834 /* Turn off outputs that were already powered off */
835 if (drm_helper_choose_crtc_dpms(crtc)) {
836 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
837
838 if(encoder->crtc != crtc)
839 continue;
840
841 encoder_funcs = encoder->helper_private;
842 if (encoder_funcs->dpms)
843 (*encoder_funcs->dpms) (encoder,
844 drm_helper_choose_encoder_dpms(encoder));
David John89347bb2009-12-31 12:00:46 +0530845 }
Chris Wilson817e6312010-08-06 15:03:31 +0100846
847 crtc_funcs = crtc->helper_private;
848 if (crtc_funcs->dpms)
849 (*crtc_funcs->dpms) (crtc,
850 drm_helper_choose_crtc_dpms(crtc));
David John89347bb2009-12-31 12:00:46 +0530851 }
Dave Airlief453ba02008-11-07 14:05:41 -0800852 }
Zhao Yakuiaf4fcb52009-07-08 14:13:13 +0800853 /* disable the unused connectors while restoring the modesetting */
854 drm_helper_disable_unused_functions(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800855 return 0;
856}
857EXPORT_SYMBOL(drm_helper_resume_force_mode);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000858
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000859#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
Tejun Heo991ea752010-07-20 22:09:02 +0200860static void output_poll_execute(struct work_struct *work)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000861{
Tejun Heo991ea752010-07-20 22:09:02 +0200862 struct delayed_work *delayed_work = to_delayed_work(work);
863 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000864 struct drm_connector *connector;
Keith Packardc5027de2010-11-26 10:45:59 -0800865 enum drm_connector_status old_status;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000866 bool repoll = false, changed = false;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000867
Chris Wilsone58f6372010-08-20 09:13:36 +0100868 if (!drm_kms_helper_poll)
869 return;
870
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000871 mutex_lock(&dev->mode_config.mutex);
872 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
873
874 /* if this is HPD or polled don't check it -
875 TV out for instance */
876 if (!connector->polled)
877 continue;
878
879 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
880 repoll = true;
881
882 old_status = connector->status;
883 /* if we are connected and don't want to poll for disconnect
884 skip it */
885 if (old_status == connector_status_connected &&
886 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
887 !(connector->polled & DRM_CONNECTOR_POLL_HPD))
888 continue;
889
Keith Packardc5027de2010-11-26 10:45:59 -0800890 connector->status = connector->funcs->detect(connector, false);
Chris Wilson0f168302010-12-21 22:49:28 +0000891 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
892 connector->base.id,
893 drm_get_connector_name(connector),
894 old_status, connector->status);
Keith Packardc5027de2010-11-26 10:45:59 -0800895 if (old_status != connector->status)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000896 changed = true;
897 }
898
899 mutex_unlock(&dev->mode_config.mutex);
900
901 if (changed) {
902 /* send a uevent + call fbdev */
903 drm_sysfs_hotplug_event(dev);
904 if (dev->mode_config.funcs->output_poll_changed)
905 dev->mode_config.funcs->output_poll_changed(dev);
906 }
907
Tejun Heo9a919c42010-08-09 12:01:27 +0200908 if (repoll)
909 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000910}
911
Dave Airliefbf81762010-06-01 09:09:06 +1000912void drm_kms_helper_poll_disable(struct drm_device *dev)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000913{
Dave Airliefbf81762010-06-01 09:09:06 +1000914 if (!dev->mode_config.poll_enabled)
915 return;
Tejun Heo991ea752010-07-20 22:09:02 +0200916 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
Dave Airliefbf81762010-06-01 09:09:06 +1000917}
918EXPORT_SYMBOL(drm_kms_helper_poll_disable);
919
920void drm_kms_helper_poll_enable(struct drm_device *dev)
921{
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000922 bool poll = false;
Dave Airliefbf81762010-06-01 09:09:06 +1000923 struct drm_connector *connector;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000924
Chris Wilsone58f6372010-08-20 09:13:36 +0100925 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
926 return;
927
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000928 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
929 if (connector->polled)
930 poll = true;
931 }
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000932
Tejun Heo9a919c42010-08-09 12:01:27 +0200933 if (poll)
934 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000935}
Dave Airliefbf81762010-06-01 09:09:06 +1000936EXPORT_SYMBOL(drm_kms_helper_poll_enable);
937
938void drm_kms_helper_poll_init(struct drm_device *dev)
939{
Tejun Heo991ea752010-07-20 22:09:02 +0200940 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
Dave Airliefbf81762010-06-01 09:09:06 +1000941 dev->mode_config.poll_enabled = true;
942
943 drm_kms_helper_poll_enable(dev);
944}
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000945EXPORT_SYMBOL(drm_kms_helper_poll_init);
946
947void drm_kms_helper_poll_fini(struct drm_device *dev)
948{
Dave Airliefbf81762010-06-01 09:09:06 +1000949 drm_kms_helper_poll_disable(dev);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000950}
951EXPORT_SYMBOL(drm_kms_helper_poll_fini);
952
953void drm_helper_hpd_irq_event(struct drm_device *dev)
954{
955 if (!dev->mode_config.poll_enabled)
956 return;
Chris Wilsone58f6372010-08-20 09:13:36 +0100957
Tejun Heo991ea752010-07-20 22:09:02 +0200958 /* kill timer and schedule immediate execution, this doesn't block */
959 cancel_delayed_work(&dev->mode_config.output_poll_work);
Chris Wilsone58f6372010-08-20 09:13:36 +0100960 if (drm_kms_helper_poll)
961 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000962}
963EXPORT_SYMBOL(drm_helper_hpd_irq_event);