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8d754544 DV |
1 | /* |
2 | * Copyright (c) 2006-2008 Intel Corporation | |
3 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
4 | * | |
5 | * DRM core CRTC related functions | |
6 | * | |
7 | * Permission to use, copy, modify, distribute, and sell this software and its | |
8 | * documentation for any purpose is hereby granted without fee, provided that | |
9 | * the above copyright notice appear in all copies and that both that copyright | |
10 | * notice and this permission notice appear in supporting documentation, and | |
11 | * that the name of the copyright holders not be used in advertising or | |
12 | * publicity pertaining to distribution of the software without specific, | |
13 | * written prior permission. The copyright holders make no representations | |
14 | * about the suitability of this software for any purpose. It is provided "as | |
15 | * is" without express or implied warranty. | |
16 | * | |
17 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
18 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
19 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
20 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
21 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
22 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
23 | * OF THIS SOFTWARE. | |
24 | * | |
25 | * Authors: | |
26 | * Keith Packard | |
27 | * Eric Anholt <eric@anholt.net> | |
28 | * Dave Airlie <airlied@linux.ie> | |
29 | * Jesse Barnes <jesse.barnes@intel.com> | |
30 | */ | |
31 | ||
32 | #include <linux/export.h> | |
33 | #include <linux/moduleparam.h> | |
34 | ||
35 | #include <drm/drmP.h> | |
36 | #include <drm/drm_crtc.h> | |
37 | #include <drm/drm_fourcc.h> | |
38 | #include <drm/drm_crtc_helper.h> | |
39 | #include <drm/drm_fb_helper.h> | |
40 | #include <drm/drm_edid.h> | |
41 | ||
42 | /** | |
43 | * DOC: output probing helper overview | |
44 | * | |
45 | * This library provides some helper code for output probing. It provides an | |
46 | * implementation of the core connector->fill_modes interface with | |
47 | * drm_helper_probe_single_connector_modes. | |
48 | * | |
49 | * It also provides support for polling connectors with a work item and for | |
50 | * generic hotplug interrupt handling where the driver doesn't or cannot keep | |
51 | * track of a per-connector hpd interrupt. | |
52 | * | |
53 | * This helper library can be used independently of the modeset helper library. | |
54 | * Drivers can also overwrite different parts e.g. use their own hotplug | |
55 | * handling code to avoid probing unrelated outputs. | |
56 | */ | |
57 | ||
58 | static bool drm_kms_helper_poll = true; | |
59 | module_param_named(poll, drm_kms_helper_poll, bool, 0600); | |
60 | ||
05acaec3 VS |
61 | static enum drm_mode_status |
62 | drm_mode_validate_flag(const struct drm_display_mode *mode, | |
63 | int flags) | |
8d754544 | 64 | { |
05acaec3 VS |
65 | if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && |
66 | !(flags & DRM_MODE_FLAG_INTERLACE)) | |
67 | return MODE_NO_INTERLACE; | |
8d754544 | 68 | |
05acaec3 VS |
69 | if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && |
70 | !(flags & DRM_MODE_FLAG_DBLSCAN)) | |
71 | return MODE_NO_DBLESCAN; | |
8d754544 | 72 | |
05acaec3 VS |
73 | if ((mode->flags & DRM_MODE_FLAG_3D_MASK) && |
74 | !(flags & DRM_MODE_FLAG_3D_MASK)) | |
75 | return MODE_NO_STEREO; | |
8d754544 | 76 | |
05acaec3 | 77 | return MODE_OK; |
8d754544 DV |
78 | } |
79 | ||
eaf99c74 CW |
80 | static int drm_helper_probe_add_cmdline_mode(struct drm_connector *connector) |
81 | { | |
82 | struct drm_display_mode *mode; | |
83 | ||
84 | if (!connector->cmdline_mode.specified) | |
85 | return 0; | |
86 | ||
87 | mode = drm_mode_create_from_cmdline_mode(connector->dev, | |
88 | &connector->cmdline_mode); | |
89 | if (mode == NULL) | |
90 | return 0; | |
91 | ||
92 | drm_mode_probed_add(connector, mode); | |
93 | return 1; | |
94 | } | |
95 | ||
8c4ccc4a DV |
96 | #define DRM_OUTPUT_POLL_PERIOD (10*HZ) |
97 | static void __drm_kms_helper_poll_enable(struct drm_device *dev) | |
98 | { | |
99 | bool poll = false; | |
100 | struct drm_connector *connector; | |
101 | ||
102 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
103 | ||
104 | if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) | |
105 | return; | |
106 | ||
107 | drm_for_each_connector(connector, dev) { | |
108 | if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | | |
109 | DRM_CONNECTOR_POLL_DISCONNECT)) | |
110 | poll = true; | |
111 | } | |
112 | ||
113 | if (poll) | |
114 | schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); | |
115 | } | |
116 | ||
b87577b7 DA |
117 | static int drm_helper_probe_single_connector_modes_merge_bits(struct drm_connector *connector, |
118 | uint32_t maxX, uint32_t maxY, bool merge_type_bits) | |
8d754544 DV |
119 | { |
120 | struct drm_device *dev = connector->dev; | |
121 | struct drm_display_mode *mode; | |
be26a66d | 122 | const struct drm_connector_helper_funcs *connector_funcs = |
8d754544 DV |
123 | connector->helper_private; |
124 | int count = 0; | |
125 | int mode_flags = 0; | |
126 | bool verbose_prune = true; | |
162b6a57 | 127 | enum drm_connector_status old_status; |
8d754544 DV |
128 | |
129 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
130 | ||
131 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, | |
25933820 | 132 | connector->name); |
8d754544 DV |
133 | /* set all modes to the unverified state */ |
134 | list_for_each_entry(mode, &connector->modes, head) | |
135 | mode->status = MODE_UNVERIFIED; | |
136 | ||
137 | if (connector->force) { | |
2c4cc91b PH |
138 | if (connector->force == DRM_FORCE_ON || |
139 | connector->force == DRM_FORCE_ON_DIGITAL) | |
8d754544 DV |
140 | connector->status = connector_status_connected; |
141 | else | |
142 | connector->status = connector_status_disconnected; | |
143 | if (connector->funcs->force) | |
144 | connector->funcs->force(connector); | |
145 | } else { | |
162b6a57 DV |
146 | old_status = connector->status; |
147 | ||
8d754544 | 148 | connector->status = connector->funcs->detect(connector, true); |
162b6a57 DV |
149 | |
150 | /* | |
151 | * Normally either the driver's hpd code or the poll loop should | |
152 | * pick up any changes and fire the hotplug event. But if | |
153 | * userspace sneaks in a probe, we might miss a change. Hence | |
154 | * check here, and if anything changed start the hotplug code. | |
155 | */ | |
156 | if (old_status != connector->status) { | |
157 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", | |
158 | connector->base.id, | |
159 | connector->name, | |
160 | old_status, connector->status); | |
161 | ||
162 | /* | |
163 | * The hotplug event code might call into the fb | |
164 | * helpers, and so expects that we do not hold any | |
165 | * locks. Fire up the poll struct instead, it will | |
166 | * disable itself again. | |
167 | */ | |
168 | dev->mode_config.delayed_event = true; | |
169 | if (dev->mode_config.poll_enabled) | |
170 | schedule_delayed_work(&dev->mode_config.output_poll_work, | |
171 | 0); | |
172 | } | |
8d754544 DV |
173 | } |
174 | ||
175 | /* Re-enable polling in case the global poll config changed. */ | |
176 | if (drm_kms_helper_poll != dev->mode_config.poll_running) | |
8c4ccc4a | 177 | __drm_kms_helper_poll_enable(dev); |
8d754544 DV |
178 | |
179 | dev->mode_config.poll_running = drm_kms_helper_poll; | |
180 | ||
181 | if (connector->status == connector_status_disconnected) { | |
182 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", | |
25933820 | 183 | connector->base.id, connector->name); |
8d754544 DV |
184 | drm_mode_connector_update_edid_property(connector, NULL); |
185 | verbose_prune = false; | |
186 | goto prune; | |
187 | } | |
188 | ||
189 | #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE | |
190 | count = drm_load_edid_firmware(connector); | |
191 | if (count == 0) | |
192 | #endif | |
4cf2b281 TW |
193 | { |
194 | if (connector->override_edid) { | |
195 | struct edid *edid = (struct edid *) connector->edid_blob_ptr->data; | |
196 | ||
197 | count = drm_add_edid_modes(connector, edid); | |
ad692b46 | 198 | drm_edid_to_eld(connector, edid); |
4cf2b281 TW |
199 | } else |
200 | count = (*connector_funcs->get_modes)(connector); | |
201 | } | |
8d754544 DV |
202 | |
203 | if (count == 0 && connector->status == connector_status_connected) | |
204 | count = drm_add_modes_noedid(connector, 1024, 768); | |
eaf99c74 | 205 | count += drm_helper_probe_add_cmdline_mode(connector); |
8d754544 DV |
206 | if (count == 0) |
207 | goto prune; | |
208 | ||
b87577b7 | 209 | drm_mode_connector_list_update(connector, merge_type_bits); |
8d754544 | 210 | |
8d754544 DV |
211 | if (connector->interlace_allowed) |
212 | mode_flags |= DRM_MODE_FLAG_INTERLACE; | |
213 | if (connector->doublescan_allowed) | |
214 | mode_flags |= DRM_MODE_FLAG_DBLSCAN; | |
215 | if (connector->stereo_allowed) | |
216 | mode_flags |= DRM_MODE_FLAG_3D_MASK; | |
8d754544 DV |
217 | |
218 | list_for_each_entry(mode, &connector->modes, head) { | |
abc0b144 VS |
219 | mode->status = drm_mode_validate_basic(mode); |
220 | ||
221 | if (mode->status == MODE_OK) | |
222 | mode->status = drm_mode_validate_size(mode, maxX, maxY); | |
05acaec3 VS |
223 | |
224 | if (mode->status == MODE_OK) | |
225 | mode->status = drm_mode_validate_flag(mode, mode_flags); | |
226 | ||
f9b0e251 | 227 | if (mode->status == MODE_OK && connector_funcs->mode_valid) |
8d754544 DV |
228 | mode->status = connector_funcs->mode_valid(connector, |
229 | mode); | |
230 | } | |
231 | ||
232 | prune: | |
233 | drm_mode_prune_invalid(dev, &connector->modes, verbose_prune); | |
234 | ||
235 | if (list_empty(&connector->modes)) | |
236 | return 0; | |
237 | ||
238 | list_for_each_entry(mode, &connector->modes, head) | |
239 | mode->vrefresh = drm_mode_vrefresh(mode); | |
240 | ||
241 | drm_mode_sort(&connector->modes); | |
242 | ||
243 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, | |
25933820 | 244 | connector->name); |
8d754544 DV |
245 | list_for_each_entry(mode, &connector->modes, head) { |
246 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); | |
247 | drm_mode_debug_printmodeline(mode); | |
248 | } | |
249 | ||
250 | return count; | |
251 | } | |
b87577b7 DA |
252 | |
253 | /** | |
254 | * drm_helper_probe_single_connector_modes - get complete set of display modes | |
255 | * @connector: connector to probe | |
256 | * @maxX: max width for modes | |
257 | * @maxY: max height for modes | |
258 | * | |
259 | * Based on the helper callbacks implemented by @connector try to detect all | |
260 | * valid modes. Modes will first be added to the connector's probed_modes list, | |
261 | * then culled (based on validity and the @maxX, @maxY parameters) and put into | |
262 | * the normal modes list. | |
263 | * | |
264 | * Intended to be use as a generic implementation of the ->fill_modes() | |
265 | * @connector vfunc for drivers that use the crtc helpers for output mode | |
266 | * filtering and detection. | |
267 | * | |
268 | * Returns: | |
269 | * The number of modes found on @connector. | |
270 | */ | |
271 | int drm_helper_probe_single_connector_modes(struct drm_connector *connector, | |
272 | uint32_t maxX, uint32_t maxY) | |
273 | { | |
274 | return drm_helper_probe_single_connector_modes_merge_bits(connector, maxX, maxY, true); | |
275 | } | |
8d754544 DV |
276 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); |
277 | ||
b87577b7 DA |
278 | /** |
279 | * drm_helper_probe_single_connector_modes_nomerge - get complete set of display modes | |
280 | * @connector: connector to probe | |
281 | * @maxX: max width for modes | |
282 | * @maxY: max height for modes | |
283 | * | |
284 | * This operates like drm_hehlper_probe_single_connector_modes except it | |
285 | * replaces the mode bits instead of merging them for preferred modes. | |
286 | */ | |
287 | int drm_helper_probe_single_connector_modes_nomerge(struct drm_connector *connector, | |
288 | uint32_t maxX, uint32_t maxY) | |
289 | { | |
290 | return drm_helper_probe_single_connector_modes_merge_bits(connector, maxX, maxY, false); | |
291 | } | |
292 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes_nomerge); | |
293 | ||
8d754544 DV |
294 | /** |
295 | * drm_kms_helper_hotplug_event - fire off KMS hotplug events | |
296 | * @dev: drm_device whose connector state changed | |
297 | * | |
298 | * This function fires off the uevent for userspace and also calls the | |
299 | * output_poll_changed function, which is most commonly used to inform the fbdev | |
300 | * emulation code and allow it to update the fbcon output configuration. | |
301 | * | |
302 | * Drivers should call this from their hotplug handling code when a change is | |
303 | * detected. Note that this function does not do any output detection of its | |
304 | * own, like drm_helper_hpd_irq_event() does - this is assumed to be done by the | |
305 | * driver already. | |
306 | * | |
307 | * This function must be called from process context with no mode | |
308 | * setting locks held. | |
309 | */ | |
310 | void drm_kms_helper_hotplug_event(struct drm_device *dev) | |
311 | { | |
312 | /* send a uevent + call fbdev */ | |
313 | drm_sysfs_hotplug_event(dev); | |
314 | if (dev->mode_config.funcs->output_poll_changed) | |
315 | dev->mode_config.funcs->output_poll_changed(dev); | |
316 | } | |
317 | EXPORT_SYMBOL(drm_kms_helper_hotplug_event); | |
318 | ||
8d754544 DV |
319 | static void output_poll_execute(struct work_struct *work) |
320 | { | |
321 | struct delayed_work *delayed_work = to_delayed_work(work); | |
322 | struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); | |
323 | struct drm_connector *connector; | |
324 | enum drm_connector_status old_status; | |
162b6a57 DV |
325 | bool repoll = false, changed; |
326 | ||
327 | /* Pick up any changes detected by the probe functions. */ | |
328 | changed = dev->mode_config.delayed_event; | |
329 | dev->mode_config.delayed_event = false; | |
8d754544 DV |
330 | |
331 | if (!drm_kms_helper_poll) | |
162b6a57 | 332 | goto out; |
8d754544 DV |
333 | |
334 | mutex_lock(&dev->mode_config.mutex); | |
6295d607 | 335 | drm_for_each_connector(connector, dev) { |
8d754544 DV |
336 | |
337 | /* Ignore forced connectors. */ | |
338 | if (connector->force) | |
339 | continue; | |
340 | ||
341 | /* Ignore HPD capable connectors and connectors where we don't | |
342 | * want any hotplug detection at all for polling. */ | |
343 | if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) | |
344 | continue; | |
345 | ||
8d754544 DV |
346 | old_status = connector->status; |
347 | /* if we are connected and don't want to poll for disconnect | |
348 | skip it */ | |
349 | if (old_status == connector_status_connected && | |
350 | !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) | |
351 | continue; | |
352 | ||
a3c6d686 JH |
353 | repoll = true; |
354 | ||
8d754544 DV |
355 | connector->status = connector->funcs->detect(connector, false); |
356 | if (old_status != connector->status) { | |
357 | const char *old, *new; | |
358 | ||
b7703726 DV |
359 | /* |
360 | * The poll work sets force=false when calling detect so | |
361 | * that drivers can avoid to do disruptive tests (e.g. | |
362 | * when load detect cycles could cause flickering on | |
363 | * other, running displays). This bears the risk that we | |
364 | * flip-flop between unknown here in the poll work and | |
365 | * the real state when userspace forces a full detect | |
366 | * call after receiving a hotplug event due to this | |
367 | * change. | |
368 | * | |
369 | * Hence clamp an unknown detect status to the old | |
370 | * value. | |
371 | */ | |
372 | if (connector->status == connector_status_unknown) { | |
373 | connector->status = old_status; | |
374 | continue; | |
375 | } | |
376 | ||
8d754544 DV |
377 | old = drm_get_connector_status_name(old_status); |
378 | new = drm_get_connector_status_name(connector->status); | |
379 | ||
380 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] " | |
381 | "status updated from %s to %s\n", | |
382 | connector->base.id, | |
25933820 | 383 | connector->name, |
8d754544 DV |
384 | old, new); |
385 | ||
386 | changed = true; | |
387 | } | |
388 | } | |
389 | ||
390 | mutex_unlock(&dev->mode_config.mutex); | |
391 | ||
162b6a57 | 392 | out: |
8d754544 DV |
393 | if (changed) |
394 | drm_kms_helper_hotplug_event(dev); | |
395 | ||
396 | if (repoll) | |
397 | schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); | |
398 | } | |
399 | ||
400 | /** | |
401 | * drm_kms_helper_poll_disable - disable output polling | |
402 | * @dev: drm_device | |
403 | * | |
404 | * This function disables the output polling work. | |
405 | * | |
406 | * Drivers can call this helper from their device suspend implementation. It is | |
407 | * not an error to call this even when output polling isn't enabled or arlready | |
408 | * disabled. | |
409 | */ | |
410 | void drm_kms_helper_poll_disable(struct drm_device *dev) | |
411 | { | |
412 | if (!dev->mode_config.poll_enabled) | |
413 | return; | |
414 | cancel_delayed_work_sync(&dev->mode_config.output_poll_work); | |
415 | } | |
416 | EXPORT_SYMBOL(drm_kms_helper_poll_disable); | |
417 | ||
418 | /** | |
419 | * drm_kms_helper_poll_enable - re-enable output polling. | |
420 | * @dev: drm_device | |
421 | * | |
422 | * This function re-enables the output polling work. | |
423 | * | |
424 | * Drivers can call this helper from their device resume implementation. It is | |
425 | * an error to call this when the output polling support has not yet been set | |
426 | * up. | |
427 | */ | |
428 | void drm_kms_helper_poll_enable(struct drm_device *dev) | |
429 | { | |
8c4ccc4a DV |
430 | mutex_lock(&dev->mode_config.mutex); |
431 | __drm_kms_helper_poll_enable(dev); | |
432 | mutex_unlock(&dev->mode_config.mutex); | |
8d754544 DV |
433 | } |
434 | EXPORT_SYMBOL(drm_kms_helper_poll_enable); | |
435 | ||
436 | /** | |
437 | * drm_kms_helper_poll_init - initialize and enable output polling | |
438 | * @dev: drm_device | |
439 | * | |
440 | * This function intializes and then also enables output polling support for | |
441 | * @dev. Drivers which do not have reliable hotplug support in hardware can use | |
442 | * this helper infrastructure to regularly poll such connectors for changes in | |
443 | * their connection state. | |
444 | * | |
445 | * Drivers can control which connectors are polled by setting the | |
446 | * DRM_CONNECTOR_POLL_CONNECT and DRM_CONNECTOR_POLL_DISCONNECT flags. On | |
447 | * connectors where probing live outputs can result in visual distortion drivers | |
448 | * should not set the DRM_CONNECTOR_POLL_DISCONNECT flag to avoid this. | |
449 | * Connectors which have no flag or only DRM_CONNECTOR_POLL_HPD set are | |
450 | * completely ignored by the polling logic. | |
451 | * | |
452 | * Note that a connector can be both polled and probed from the hotplug handler, | |
453 | * in case the hotplug interrupt is known to be unreliable. | |
454 | */ | |
455 | void drm_kms_helper_poll_init(struct drm_device *dev) | |
456 | { | |
457 | INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); | |
458 | dev->mode_config.poll_enabled = true; | |
459 | ||
460 | drm_kms_helper_poll_enable(dev); | |
461 | } | |
462 | EXPORT_SYMBOL(drm_kms_helper_poll_init); | |
463 | ||
464 | /** | |
465 | * drm_kms_helper_poll_fini - disable output polling and clean it up | |
466 | * @dev: drm_device | |
467 | */ | |
468 | void drm_kms_helper_poll_fini(struct drm_device *dev) | |
469 | { | |
470 | drm_kms_helper_poll_disable(dev); | |
471 | } | |
472 | EXPORT_SYMBOL(drm_kms_helper_poll_fini); | |
473 | ||
474 | /** | |
475 | * drm_helper_hpd_irq_event - hotplug processing | |
476 | * @dev: drm_device | |
477 | * | |
478 | * Drivers can use this helper function to run a detect cycle on all connectors | |
479 | * which have the DRM_CONNECTOR_POLL_HPD flag set in their &polled member. All | |
480 | * other connectors are ignored, which is useful to avoid reprobing fixed | |
481 | * panels. | |
482 | * | |
483 | * This helper function is useful for drivers which can't or don't track hotplug | |
484 | * interrupts for each connector. | |
485 | * | |
486 | * Drivers which support hotplug interrupts for each connector individually and | |
487 | * which have a more fine-grained detect logic should bypass this code and | |
488 | * directly call drm_kms_helper_hotplug_event() in case the connector state | |
489 | * changed. | |
490 | * | |
491 | * This function must be called from process context with no mode | |
492 | * setting locks held. | |
493 | * | |
494 | * Note that a connector can be both polled and probed from the hotplug handler, | |
495 | * in case the hotplug interrupt is known to be unreliable. | |
496 | */ | |
497 | bool drm_helper_hpd_irq_event(struct drm_device *dev) | |
498 | { | |
499 | struct drm_connector *connector; | |
500 | enum drm_connector_status old_status; | |
501 | bool changed = false; | |
502 | ||
503 | if (!dev->mode_config.poll_enabled) | |
504 | return false; | |
505 | ||
506 | mutex_lock(&dev->mode_config.mutex); | |
6295d607 | 507 | drm_for_each_connector(connector, dev) { |
8d754544 DV |
508 | |
509 | /* Only handle HPD capable connectors. */ | |
510 | if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) | |
511 | continue; | |
512 | ||
513 | old_status = connector->status; | |
514 | ||
515 | connector->status = connector->funcs->detect(connector, false); | |
516 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n", | |
517 | connector->base.id, | |
25933820 | 518 | connector->name, |
8d754544 DV |
519 | drm_get_connector_status_name(old_status), |
520 | drm_get_connector_status_name(connector->status)); | |
521 | if (old_status != connector->status) | |
522 | changed = true; | |
523 | } | |
524 | ||
525 | mutex_unlock(&dev->mode_config.mutex); | |
526 | ||
527 | if (changed) | |
528 | drm_kms_helper_hotplug_event(dev); | |
529 | ||
530 | return changed; | |
531 | } | |
532 | EXPORT_SYMBOL(drm_helper_hpd_irq_event); |