blob: 1fe719fb32e8da5e6befea3eec46136a9886135f [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
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040032#include <linux/export.h>
Paul Gortmaker0603ba12011-08-31 11:29:09 -040033#include <linux/moduleparam.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040034
David Howells760285e2012-10-02 18:01:07 +010035#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>
Dave Airlief453ba02008-11-07 14:05:41 -080041
Daniel Vettercfc1a062012-10-27 15:52:04 +020042void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
43{
44 struct drm_connector *connector, *tmp;
45 struct list_head panel_list;
46
47 INIT_LIST_HEAD(&panel_list);
48
49 list_for_each_entry_safe(connector, tmp,
50 &dev->mode_config.connector_list, head) {
51 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
52 connector->connector_type == DRM_MODE_CONNECTOR_eDP)
53 list_move_tail(&connector->head, &panel_list);
54 }
55
56 list_splice(&panel_list, &dev->mode_config.connector_list);
57}
58EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
59
Chris Wilsone58f6372010-08-20 09:13:36 +010060static bool drm_kms_helper_poll = true;
61module_param_named(poll, drm_kms_helper_poll, bool, 0600);
62
yakui_zhao67149772009-04-02 11:52:12 +080063static void drm_mode_validate_flag(struct drm_connector *connector,
64 int flags)
65{
Sascha Hauera1178ca2012-02-01 11:38:30 +010066 struct drm_display_mode *mode;
yakui_zhao67149772009-04-02 11:52:12 +080067
68 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
69 return;
70
Sascha Hauera1178ca2012-02-01 11:38:30 +010071 list_for_each_entry(mode, &connector->modes, head) {
yakui_zhao67149772009-04-02 11:52:12 +080072 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
73 !(flags & DRM_MODE_FLAG_INTERLACE))
74 mode->status = MODE_NO_INTERLACE;
75 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
76 !(flags & DRM_MODE_FLAG_DBLSCAN))
77 mode->status = MODE_NO_DBLESCAN;
78 }
79
80 return;
81}
82
Dave Airlief453ba02008-11-07 14:05:41 -080083/**
Dave Airlie38651672010-03-30 05:34:13 +000084 * drm_helper_probe_single_connector_modes - get complete set of display modes
Dave Airlief453ba02008-11-07 14:05:41 -080085 * @dev: DRM device
86 * @maxX: max width for modes
87 * @maxY: max height for modes
88 *
89 * LOCKING:
90 * Caller must hold mode config lock.
91 *
92 * Based on @dev's mode_config layout, scan all the connectors and try to detect
93 * modes on them. Modes will first be added to the connector's probed_modes
94 * list, then culled (based on validity and the @maxX, @maxY parameters) and
95 * put into the normal modes list.
96 *
97 * Intended to be used either at bootup time or when major configuration
98 * changes have occurred.
99 *
100 * FIXME: take into account monitor limits
Jesse Barnes40a518d2009-01-12 12:05:32 -0800101 *
102 * RETURNS:
103 * Number of modes found on @connector.
Dave Airlief453ba02008-11-07 14:05:41 -0800104 */
Jesse Barnes40a518d2009-01-12 12:05:32 -0800105int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
106 uint32_t maxX, uint32_t maxY)
Dave Airlief453ba02008-11-07 14:05:41 -0800107{
108 struct drm_device *dev = connector->dev;
Sascha Hauera1178ca2012-02-01 11:38:30 +0100109 struct drm_display_mode *mode;
Dave Airlief453ba02008-11-07 14:05:41 -0800110 struct drm_connector_helper_funcs *connector_funcs =
111 connector->helper_private;
Jesse Barnes40a518d2009-01-12 12:05:32 -0800112 int count = 0;
yakui_zhao67149772009-04-02 11:52:12 +0800113 int mode_flags = 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800114
Jerome Glisse94401062010-07-15 15:43:25 -0400115 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
116 drm_get_connector_name(connector));
Dave Airlief453ba02008-11-07 14:05:41 -0800117 /* set all modes to the unverified state */
Sascha Hauera1178ca2012-02-01 11:38:30 +0100118 list_for_each_entry(mode, &connector->modes, head)
Dave Airlief453ba02008-11-07 14:05:41 -0800119 mode->status = MODE_UNVERIFIED;
120
Dave Airlied50ba252009-09-23 14:44:08 +1000121 if (connector->force) {
122 if (connector->force == DRM_FORCE_ON)
123 connector->status = connector_status_connected;
124 else
125 connector->status = connector_status_disconnected;
126 if (connector->funcs->force)
127 connector->funcs->force(connector);
Chris Wilsone58f6372010-08-20 09:13:36 +0100128 } else {
Chris Wilson930a9e22010-09-14 11:07:23 +0100129 connector->status = connector->funcs->detect(connector, true);
Chris Wilsone58f6372010-08-20 09:13:36 +0100130 }
Dave Airlief453ba02008-11-07 14:05:41 -0800131
Daniel Vetter905bc9f2012-10-23 18:23:36 +0000132 /* Re-enable polling in case the global poll config changed. */
133 if (drm_kms_helper_poll != dev->mode_config.poll_running)
134 drm_kms_helper_poll_enable(dev);
135
136 dev->mode_config.poll_running = drm_kms_helper_poll;
137
Dave Airlief453ba02008-11-07 14:05:41 -0800138 if (connector->status == connector_status_disconnected) {
Jerome Glisse94401062010-07-15 15:43:25 -0400139 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
140 connector->base.id, drm_get_connector_name(connector));
Zhao Yakui72539832010-03-04 08:25:55 +0000141 drm_mode_connector_update_edid_property(connector, NULL);
Adam Jackson620f3782009-09-08 11:51:46 +1000142 goto prune;
Dave Airlief453ba02008-11-07 14:05:41 -0800143 }
144
Carsten Emdeda0df922012-03-18 22:37:33 +0100145#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
146 count = drm_load_edid_firmware(connector);
147 if (count == 0)
148#endif
149 count = (*connector_funcs->get_modes)(connector);
150
Chris Wilsonc7ef35a2010-09-05 16:55:25 +0100151 if (count == 0 && connector->status == connector_status_connected)
Adam Jackson9632b412009-11-23 14:23:07 -0500152 count = drm_add_modes_noedid(connector, 1024, 768);
Chris Wilsonc7ef35a2010-09-05 16:55:25 +0100153 if (count == 0)
154 goto prune;
Dave Airlief453ba02008-11-07 14:05:41 -0800155
Jesse Barnes40a518d2009-01-12 12:05:32 -0800156 drm_mode_connector_list_update(connector);
Dave Airlief453ba02008-11-07 14:05:41 -0800157
158 if (maxX && maxY)
159 drm_mode_validate_size(dev, &connector->modes, maxX,
160 maxY, 0);
yakui_zhao67149772009-04-02 11:52:12 +0800161
162 if (connector->interlace_allowed)
163 mode_flags |= DRM_MODE_FLAG_INTERLACE;
164 if (connector->doublescan_allowed)
165 mode_flags |= DRM_MODE_FLAG_DBLSCAN;
166 drm_mode_validate_flag(connector, mode_flags);
167
Sascha Hauera1178ca2012-02-01 11:38:30 +0100168 list_for_each_entry(mode, &connector->modes, head) {
Dave Airlief453ba02008-11-07 14:05:41 -0800169 if (mode->status == MODE_OK)
170 mode->status = connector_funcs->mode_valid(connector,
171 mode);
172 }
173
Adam Jackson620f3782009-09-08 11:51:46 +1000174prune:
Dave Airlief453ba02008-11-07 14:05:41 -0800175 drm_mode_prune_invalid(dev, &connector->modes, true);
176
Jesse Barnes40a518d2009-01-12 12:05:32 -0800177 if (list_empty(&connector->modes))
178 return 0;
Dave Airlief453ba02008-11-07 14:05:41 -0800179
180 drm_mode_sort(&connector->modes);
181
Jerome Glisse94401062010-07-15 15:43:25 -0400182 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
183 drm_get_connector_name(connector));
Sascha Hauera1178ca2012-02-01 11:38:30 +0100184 list_for_each_entry(mode, &connector->modes, head) {
Dave Airlief453ba02008-11-07 14:05:41 -0800185 mode->vrefresh = drm_mode_vrefresh(mode);
186
187 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
188 drm_mode_debug_printmodeline(mode);
189 }
Jesse Barnes40a518d2009-01-12 12:05:32 -0800190
191 return count;
Dave Airlief453ba02008-11-07 14:05:41 -0800192}
193EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
194
Dave Airlief453ba02008-11-07 14:05:41 -0800195/**
Keith Packardc9fb15f2009-05-30 20:42:28 -0700196 * drm_helper_encoder_in_use - check if a given encoder is in use
197 * @encoder: encoder to check
198 *
199 * LOCKING:
200 * Caller must hold mode config lock.
201 *
202 * Walk @encoders's DRM device's mode_config and see if it's in use.
203 *
204 * RETURNS:
205 * True if @encoder is part of the mode_config, false otherwise.
206 */
207bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
208{
209 struct drm_connector *connector;
210 struct drm_device *dev = encoder->dev;
211 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
212 if (connector->encoder == encoder)
213 return true;
214 return false;
215}
216EXPORT_SYMBOL(drm_helper_encoder_in_use);
217
218/**
Dave Airlief453ba02008-11-07 14:05:41 -0800219 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
220 * @crtc: CRTC to check
221 *
222 * LOCKING:
223 * Caller must hold mode config lock.
224 *
225 * Walk @crtc's DRM device's mode_config and see if it's in use.
226 *
227 * RETURNS:
228 * True if @crtc is part of the mode_config, false otherwise.
229 */
230bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
231{
232 struct drm_encoder *encoder;
233 struct drm_device *dev = crtc->dev;
234 /* FIXME: Locking around list access? */
235 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700236 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
Dave Airlief453ba02008-11-07 14:05:41 -0800237 return true;
238 return false;
239}
240EXPORT_SYMBOL(drm_helper_crtc_in_use);
241
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000242static void
243drm_encoder_disable(struct drm_encoder *encoder)
244{
245 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
246
247 if (encoder_funcs->disable)
248 (*encoder_funcs->disable)(encoder);
249 else
250 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
251}
252
Dave Airlief453ba02008-11-07 14:05:41 -0800253/**
David John89347bb2009-12-31 12:00:46 +0530254 * drm_helper_disable_unused_functions - disable unused objects
Dave Airlief453ba02008-11-07 14:05:41 -0800255 * @dev: DRM device
256 *
257 * LOCKING:
258 * Caller must hold mode config lock.
259 *
260 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
261 * by calling its dpms function, which should power it off.
262 */
263void drm_helper_disable_unused_functions(struct drm_device *dev)
264{
265 struct drm_encoder *encoder;
Dave Airliea3a05442009-08-31 15:16:30 +1000266 struct drm_connector *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800267 struct drm_crtc *crtc;
268
Dave Airliea3a05442009-08-31 15:16:30 +1000269 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
270 if (!connector->encoder)
271 continue;
272 if (connector->status == connector_status_disconnected)
273 connector->encoder = NULL;
274 }
275
Dave Airlief453ba02008-11-07 14:05:41 -0800276 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
Dave Airlie929710212010-12-21 12:47:56 +1000277 if (!drm_helper_encoder_in_use(encoder)) {
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000278 drm_encoder_disable(encoder);
Dave Airlie9c552dd2009-09-02 14:00:11 +1000279 /* disconnector encoder from any connector */
280 encoder->crtc = NULL;
Dave Airliea3a05442009-08-31 15:16:30 +1000281 }
Dave Airlief453ba02008-11-07 14:05:41 -0800282 }
283
284 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
285 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
286 crtc->enabled = drm_helper_crtc_in_use(crtc);
287 if (!crtc->enabled) {
Alex Deucher5c8d7172010-06-11 17:04:35 -0400288 if (crtc_funcs->disable)
289 (*crtc_funcs->disable)(crtc);
290 else
291 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
Dave Airlief453ba02008-11-07 14:05:41 -0800292 crtc->fb = NULL;
293 }
294 }
295}
296EXPORT_SYMBOL(drm_helper_disable_unused_functions);
297
Jesse Barnes7bec7562009-02-23 16:09:34 -0800298/**
299 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
300 * @encoder: encoder to test
301 * @crtc: crtc to test
302 *
303 * Return false if @encoder can't be driven by @crtc, true otherwise.
304 */
305static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
306 struct drm_crtc *crtc)
307{
308 struct drm_device *dev;
309 struct drm_crtc *tmp;
310 int crtc_mask = 1;
311
Joe Perchesfce7d612010-10-30 21:08:30 +0000312 WARN(!crtc, "checking null crtc?\n");
Jesse Barnes7bec7562009-02-23 16:09:34 -0800313
314 dev = crtc->dev;
315
316 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
317 if (tmp == crtc)
318 break;
319 crtc_mask <<= 1;
320 }
321
322 if (encoder->possible_crtcs & crtc_mask)
323 return true;
324 return false;
325}
326
327/*
328 * Check the CRTC we're going to map each output to vs. its current
329 * CRTC. If they don't match, we have to disable the output and the CRTC
330 * since the driver will have to re-route things.
331 */
332static void
333drm_crtc_prepare_encoders(struct drm_device *dev)
334{
335 struct drm_encoder_helper_funcs *encoder_funcs;
336 struct drm_encoder *encoder;
337
338 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
339 encoder_funcs = encoder->helper_private;
340 /* Disable unused encoders */
341 if (encoder->crtc == NULL)
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000342 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800343 /* Disable encoders whose CRTC is about to change */
344 if (encoder_funcs->get_crtc &&
345 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000346 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800347 }
348}
349
Dave Airlief453ba02008-11-07 14:05:41 -0800350/**
351 * drm_crtc_set_mode - set a mode
352 * @crtc: CRTC to program
353 * @mode: mode to use
Alex Deucher4c9287c2012-11-09 17:26:32 +0000354 * @x: horizontal offset into the surface
355 * @y: vertical offset into the surface
Dave Airlief453ba02008-11-07 14:05:41 -0800356 *
357 * LOCKING:
358 * Caller must hold mode config lock.
359 *
360 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
361 * to fixup or reject the mode prior to trying to set it.
362 *
363 * RETURNS:
364 * True if the mode was set successfully, or false otherwise.
365 */
366bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
367 struct drm_display_mode *mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500368 int x, int y,
369 struct drm_framebuffer *old_fb)
Dave Airlief453ba02008-11-07 14:05:41 -0800370{
371 struct drm_device *dev = crtc->dev;
Mario Kleiner27641c32010-10-23 04:20:23 +0200372 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800373 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
374 struct drm_encoder_helper_funcs *encoder_funcs;
375 int saved_x, saved_y;
376 struct drm_encoder *encoder;
377 bool ret = true;
378
Dave Airlief453ba02008-11-07 14:05:41 -0800379 crtc->enabled = drm_helper_crtc_in_use(crtc);
Dave Airlief453ba02008-11-07 14:05:41 -0800380 if (!crtc->enabled)
381 return true;
382
Chris Wilson021a8452011-01-28 11:31:56 +0000383 adjusted_mode = drm_mode_duplicate(dev, mode);
Ville Syrjälä6bfc56a2012-03-13 12:35:48 +0200384 if (!adjusted_mode)
385 return false;
Chris Wilson021a8452011-01-28 11:31:56 +0000386
Mario Kleiner27641c32010-10-23 04:20:23 +0200387 saved_hwmode = crtc->hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800388 saved_mode = crtc->mode;
389 saved_x = crtc->x;
390 saved_y = crtc->y;
391
392 /* Update crtc values up front so the driver can rely on them for mode
393 * setting.
394 */
395 crtc->mode = *mode;
396 crtc->x = x;
397 crtc->y = y;
398
Dave Airlief453ba02008-11-07 14:05:41 -0800399 /* Pass our mode to the connectors and the CRTC to give them a chance to
400 * adjust it according to limitations or connector properties, and also
401 * a chance to reject the mode entirely.
402 */
403 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
404
405 if (encoder->crtc != crtc)
406 continue;
407 encoder_funcs = encoder->helper_private;
408 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
409 adjusted_mode))) {
Adam Jackson836e53d2011-10-10 16:21:27 -0400410 DRM_DEBUG_KMS("Encoder fixup failed\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800411 goto done;
412 }
413 }
414
415 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
Adam Jackson836e53d2011-10-10 16:21:27 -0400416 DRM_DEBUG_KMS("CRTC fixup failed\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800417 goto done;
418 }
Jerome Glisse94401062010-07-15 15:43:25 -0400419 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800420
421 /* Prepare the encoders and CRTCs before setting the mode. */
422 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
423
424 if (encoder->crtc != crtc)
425 continue;
426 encoder_funcs = encoder->helper_private;
427 /* Disable the encoders as the first thing we do. */
428 encoder_funcs->prepare(encoder);
429 }
430
Jesse Barnes7bec7562009-02-23 16:09:34 -0800431 drm_crtc_prepare_encoders(dev);
432
Dave Airlief453ba02008-11-07 14:05:41 -0800433 crtc_funcs->prepare(crtc);
434
435 /* Set up the DPLL and any encoders state that needs to adjust or depend
436 * on the DPLL.
437 */
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000438 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
439 if (!ret)
440 goto done;
Dave Airlief453ba02008-11-07 14:05:41 -0800441
442 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
443
444 if (encoder->crtc != crtc)
445 continue;
446
Jerome Glisse94401062010-07-15 15:43:25 -0400447 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
448 encoder->base.id, drm_get_encoder_name(encoder),
449 mode->base.id, mode->name);
Dave Airlief453ba02008-11-07 14:05:41 -0800450 encoder_funcs = encoder->helper_private;
451 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
452 }
453
454 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
455 crtc_funcs->commit(crtc);
456
457 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
458
459 if (encoder->crtc != crtc)
460 continue;
461
462 encoder_funcs = encoder->helper_private;
463 encoder_funcs->commit(encoder);
464
465 }
466
Mario Kleiner27641c32010-10-23 04:20:23 +0200467 /* Store real post-adjustment hardware mode. */
468 crtc->hwmode = *adjusted_mode;
469
470 /* Calculate and store various constants which
471 * are later needed by vblank and swap-completion
472 * timestamping. They are derived from true hwmode.
473 */
474 drm_calc_timestamping_constants(crtc);
475
Dave Airlief453ba02008-11-07 14:05:41 -0800476 /* FIXME: add subpixel order */
477done:
Chris Wilson021a8452011-01-28 11:31:56 +0000478 drm_mode_destroy(dev, adjusted_mode);
Dave Airlief453ba02008-11-07 14:05:41 -0800479 if (!ret) {
Mario Kleiner27641c32010-10-23 04:20:23 +0200480 crtc->hwmode = saved_hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800481 crtc->mode = saved_mode;
482 crtc->x = saved_x;
483 crtc->y = saved_y;
484 }
485
486 return ret;
487}
488EXPORT_SYMBOL(drm_crtc_helper_set_mode);
489
490
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000491static int
492drm_crtc_helper_disable(struct drm_crtc *crtc)
493{
494 struct drm_device *dev = crtc->dev;
495 struct drm_connector *connector;
496 struct drm_encoder *encoder;
497
498 /* Decouple all encoders and their attached connectors from this crtc */
499 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
500 if (encoder->crtc != crtc)
501 continue;
502
503 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
504 if (connector->encoder != encoder)
505 continue;
506
507 connector->encoder = NULL;
508 }
509 }
510
511 drm_helper_disable_unused_functions(dev);
512 return 0;
513}
514
Dave Airlief453ba02008-11-07 14:05:41 -0800515/**
516 * drm_crtc_helper_set_config - set a new config from userspace
517 * @crtc: CRTC to setup
518 * @crtc_info: user provided configuration
519 * @new_mode: new mode to set
520 * @connector_set: set of connectors for the new config
521 * @fb: new framebuffer
522 *
523 * LOCKING:
524 * Caller must hold mode config lock.
525 *
526 * Setup a new configuration, provided by the user in @crtc_info, and enable
527 * it.
528 *
529 * RETURNS:
530 * Zero. (FIXME)
531 */
532int drm_crtc_helper_set_config(struct drm_mode_set *set)
533{
534 struct drm_device *dev;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200535 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
536 struct drm_encoder *save_encoders, *new_encoder, *encoder;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800537 struct drm_framebuffer *old_fb = NULL;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100538 bool mode_changed = false; /* if true do a full mode set */
539 bool fb_changed = false; /* if true and !mode_changed just do a flip */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200540 struct drm_connector *save_connectors, *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800541 int count = 0, ro, fail = 0;
542 struct drm_crtc_helper_funcs *crtc_funcs;
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800543 struct drm_mode_set save_set;
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200544 int ret;
Keith Packardbf9dc102010-11-26 10:45:58 -0800545 int i;
Dave Airlief453ba02008-11-07 14:05:41 -0800546
Zhao Yakui58367ed2009-07-20 13:48:07 +0800547 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800548
549 if (!set)
550 return -EINVAL;
551
552 if (!set->crtc)
553 return -EINVAL;
554
555 if (!set->crtc->helper_private)
556 return -EINVAL;
557
558 crtc_funcs = set->crtc->helper_private;
559
Chris Wilsonede3ff52011-01-31 11:16:33 +0000560 if (!set->mode)
561 set->fb = NULL;
562
Jerome Glisse94401062010-07-15 15:43:25 -0400563 if (set->fb) {
564 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
565 set->crtc->base.id, set->fb->base.id,
566 (int)set->num_connectors, set->x, set->y);
567 } else {
Chris Wilsonede3ff52011-01-31 11:16:33 +0000568 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000569 return drm_crtc_helper_disable(set->crtc);
Jerome Glisse94401062010-07-15 15:43:25 -0400570 }
Dave Airlief453ba02008-11-07 14:05:41 -0800571
572 dev = set->crtc->dev;
573
Maarten Maathuise67aae72009-08-27 10:18:29 +0200574 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
575 * connector data. */
576 save_crtcs = kzalloc(dev->mode_config.num_crtc *
577 sizeof(struct drm_crtc), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800578 if (!save_crtcs)
579 return -ENOMEM;
580
Maarten Maathuise67aae72009-08-27 10:18:29 +0200581 save_encoders = kzalloc(dev->mode_config.num_encoder *
582 sizeof(struct drm_encoder), GFP_KERNEL);
Dave Airlief453ba02008-11-07 14:05:41 -0800583 if (!save_encoders) {
584 kfree(save_crtcs);
585 return -ENOMEM;
586 }
587
Maarten Maathuise67aae72009-08-27 10:18:29 +0200588 save_connectors = kzalloc(dev->mode_config.num_connector *
589 sizeof(struct drm_connector), GFP_KERNEL);
590 if (!save_connectors) {
591 kfree(save_crtcs);
592 kfree(save_encoders);
593 return -ENOMEM;
594 }
595
596 /* Copy data. Note that driver private data is not affected.
597 * Should anything bad happen only the expected state is
598 * restored, not the drivers personal bookkeeping.
599 */
600 count = 0;
601 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
602 save_crtcs[count++] = *crtc;
603 }
604
605 count = 0;
606 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
607 save_encoders[count++] = *encoder;
608 }
609
610 count = 0;
611 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
612 save_connectors[count++] = *connector;
613 }
614
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800615 save_set.crtc = set->crtc;
616 save_set.mode = &set->crtc->mode;
617 save_set.x = set->crtc->x;
618 save_set.y = set->crtc->y;
619 save_set.fb = set->crtc->fb;
620
Dave Airlief453ba02008-11-07 14:05:41 -0800621 /* We should be able to check here if the fb has the same properties
622 * and then just flip_or_move it */
623 if (set->crtc->fb != set->fb) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800624 /* If we have no fb then treat it as a full mode set */
Jesse Barnes7bec7562009-02-23 16:09:34 -0800625 if (set->crtc->fb == NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800626 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800627 mode_changed = true;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100628 } else if (set->fb == NULL) {
629 mode_changed = true;
Jesse Barnes46e48452011-06-24 12:19:26 -0700630 } else if (set->fb->depth != set->crtc->fb->depth) {
631 mode_changed = true;
632 } else if (set->fb->bits_per_pixel !=
633 set->crtc->fb->bits_per_pixel) {
634 mode_changed = true;
Dave Airlie8dff4742010-02-11 14:28:58 +1000635 } else
Jesse Barnes712531b2009-01-09 13:56:14 -0800636 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800637 }
638
639 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800640 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800641
642 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800643 DRM_DEBUG_KMS("modes are different, full mode set\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800644 drm_mode_debug_printmodeline(&set->crtc->mode);
645 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800646 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800647 }
648
649 /* a) traverse passed in connector list and get encoders for them */
650 count = 0;
651 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
652 struct drm_connector_helper_funcs *connector_funcs =
653 connector->helper_private;
Dave Airlief453ba02008-11-07 14:05:41 -0800654 new_encoder = connector->encoder;
655 for (ro = 0; ro < set->num_connectors; ro++) {
656 if (set->connectors[ro] == connector) {
657 new_encoder = connector_funcs->best_encoder(connector);
658 /* if we can't get an encoder for a connector
659 we are setting now - then fail */
660 if (new_encoder == NULL)
661 /* don't break so fail path works correct */
662 fail = 1;
663 break;
664 }
665 }
666
667 if (new_encoder != connector->encoder) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800668 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800669 mode_changed = true;
Maarten Maathuisff846ab2009-08-19 00:56:45 +0200670 /* If the encoder is reused for another connector, then
671 * the appropriate crtc will be set later.
672 */
Maarten Maathuisff6fdbe2009-09-01 03:39:04 +0200673 if (connector->encoder)
674 connector->encoder->crtc = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800675 connector->encoder = new_encoder;
676 }
677 }
678
679 if (fail) {
680 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200681 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800682 }
683
684 count = 0;
685 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
686 if (!connector->encoder)
687 continue;
688
Dave Airlief453ba02008-11-07 14:05:41 -0800689 if (connector->encoder->crtc == set->crtc)
690 new_crtc = NULL;
691 else
692 new_crtc = connector->encoder->crtc;
693
694 for (ro = 0; ro < set->num_connectors; ro++) {
695 if (set->connectors[ro] == connector)
696 new_crtc = set->crtc;
697 }
Jesse Barnes7bec7562009-02-23 16:09:34 -0800698
699 /* Make sure the new CRTC will work with the encoder */
700 if (new_crtc &&
701 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
702 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200703 goto fail;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800704 }
Dave Airlief453ba02008-11-07 14:05:41 -0800705 if (new_crtc != connector->encoder->crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800706 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800707 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800708 connector->encoder->crtc = new_crtc;
709 }
Jerome Glisse94401062010-07-15 15:43:25 -0400710 if (new_crtc) {
711 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
712 connector->base.id, drm_get_connector_name(connector),
713 new_crtc->base.id);
714 } else {
715 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
716 connector->base.id, drm_get_connector_name(connector));
717 }
Dave Airlief453ba02008-11-07 14:05:41 -0800718 }
719
720 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800721 if (fb_changed && !crtc_funcs->mode_set_base)
722 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800723
Jesse Barnes712531b2009-01-09 13:56:14 -0800724 if (mode_changed) {
Chris Wilson9334ef72011-01-28 11:53:03 +0000725 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
726 if (set->crtc->enabled) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800727 DRM_DEBUG_KMS("attempting to set mode from"
728 " userspace\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800729 drm_mode_debug_printmodeline(set->mode);
Chris Wilson356ad3c2010-09-09 09:41:32 +0100730 old_fb = set->crtc->fb;
731 set->crtc->fb = set->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800732 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500733 set->x, set->y,
734 old_fb)) {
Jerome Glisse94401062010-07-15 15:43:25 -0400735 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
736 set->crtc->base.id);
Chris Wilson0ba41e42011-01-08 15:10:41 +0000737 set->crtc->fb = old_fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800738 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200739 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800740 }
Keith Packard811aaa52011-02-03 16:57:28 -0800741 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
742 for (i = 0; i < set->num_connectors; i++) {
743 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
744 drm_get_connector_name(set->connectors[i]));
Rob Clarkc7548832011-12-15 14:53:24 -0600745 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
Keith Packard811aaa52011-02-03 16:57:28 -0800746 }
Dave Airlief453ba02008-11-07 14:05:41 -0800747 }
748 drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800749 } else if (fb_changed) {
Ben Skeggs9b1596a2009-09-18 10:43:52 +1000750 set->crtc->x = set->x;
751 set->crtc->y = set->y;
752
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500753 old_fb = set->crtc->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800754 if (set->crtc->fb != set->fb)
755 set->crtc->fb = set->fb;
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000756 ret = crtc_funcs->mode_set_base(set->crtc,
757 set->x, set->y, old_fb);
Chris Wilson0ba41e42011-01-08 15:10:41 +0000758 if (ret != 0) {
759 set->crtc->fb = old_fb;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200760 goto fail;
Chris Wilson0ba41e42011-01-08 15:10:41 +0000761 }
Dave Airlief453ba02008-11-07 14:05:41 -0800762 }
763
Maarten Maathuise67aae72009-08-27 10:18:29 +0200764 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800765 kfree(save_encoders);
766 kfree(save_crtcs);
767 return 0;
768
Maarten Maathuise67aae72009-08-27 10:18:29 +0200769fail:
770 /* Restore all previous data. */
Dave Airlief453ba02008-11-07 14:05:41 -0800771 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200772 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
773 *crtc = save_crtcs[count++];
774 }
Chris Wilsone62fb642009-02-11 16:39:21 +0000775
Maarten Maathuise67aae72009-08-27 10:18:29 +0200776 count = 0;
777 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
778 *encoder = save_encoders[count++];
Chris Wilsone62fb642009-02-11 16:39:21 +0000779 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200780
Dave Airlief453ba02008-11-07 14:05:41 -0800781 count = 0;
782 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200783 *connector = save_connectors[count++];
Dave Airlief453ba02008-11-07 14:05:41 -0800784 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200785
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800786 /* Try to restore the config */
787 if (mode_changed &&
788 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
789 save_set.y, save_set.fb))
790 DRM_ERROR("failed to restore config after modeset failure\n");
791
Maarten Maathuise67aae72009-08-27 10:18:29 +0200792 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800793 kfree(save_encoders);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200794 kfree(save_crtcs);
Dave Airlief453ba02008-11-07 14:05:41 -0800795 return ret;
796}
797EXPORT_SYMBOL(drm_crtc_helper_set_config);
798
Keith Packardc9fb15f2009-05-30 20:42:28 -0700799static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
800{
801 int dpms = DRM_MODE_DPMS_OFF;
802 struct drm_connector *connector;
803 struct drm_device *dev = encoder->dev;
804
805 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
806 if (connector->encoder == encoder)
807 if (connector->dpms < dpms)
808 dpms = connector->dpms;
809 return dpms;
810}
811
812static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
813{
814 int dpms = DRM_MODE_DPMS_OFF;
815 struct drm_connector *connector;
816 struct drm_device *dev = crtc->dev;
817
818 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
819 if (connector->encoder && connector->encoder->crtc == crtc)
820 if (connector->dpms < dpms)
821 dpms = connector->dpms;
822 return dpms;
823}
824
825/**
826 * drm_helper_connector_dpms
827 * @connector affected connector
828 * @mode DPMS mode
829 *
830 * Calls the low-level connector DPMS function, then
831 * calls appropriate encoder and crtc DPMS functions as well
832 */
833void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
834{
835 struct drm_encoder *encoder = connector->encoder;
836 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
837 int old_dpms;
838
839 if (mode == connector->dpms)
840 return;
841
842 old_dpms = connector->dpms;
843 connector->dpms = mode;
844
845 /* from off to on, do crtc then encoder */
846 if (mode < old_dpms) {
847 if (crtc) {
848 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
849 if (crtc_funcs->dpms)
850 (*crtc_funcs->dpms) (crtc,
851 drm_helper_choose_crtc_dpms(crtc));
852 }
853 if (encoder) {
854 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
855 if (encoder_funcs->dpms)
856 (*encoder_funcs->dpms) (encoder,
857 drm_helper_choose_encoder_dpms(encoder));
858 }
859 }
860
861 /* from on to off, do encoder then crtc */
862 if (mode > old_dpms) {
863 if (encoder) {
864 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
865 if (encoder_funcs->dpms)
866 (*encoder_funcs->dpms) (encoder,
867 drm_helper_choose_encoder_dpms(encoder));
868 }
869 if (crtc) {
870 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
871 if (crtc_funcs->dpms)
872 (*crtc_funcs->dpms) (crtc,
873 drm_helper_choose_crtc_dpms(crtc));
874 }
875 }
876
877 return;
878}
879EXPORT_SYMBOL(drm_helper_connector_dpms);
880
Dave Airlief453ba02008-11-07 14:05:41 -0800881int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
Jesse Barnes308e5bc2011-11-14 14:51:28 -0800882 struct drm_mode_fb_cmd2 *mode_cmd)
Dave Airlief453ba02008-11-07 14:05:41 -0800883{
Ville Syrjälä01f2c772011-12-20 00:06:49 +0200884 int i;
885
Dave Airlief453ba02008-11-07 14:05:41 -0800886 fb->width = mode_cmd->width;
887 fb->height = mode_cmd->height;
Ville Syrjälä01f2c772011-12-20 00:06:49 +0200888 for (i = 0; i < 4; i++) {
889 fb->pitches[i] = mode_cmd->pitches[i];
890 fb->offsets[i] = mode_cmd->offsets[i];
891 }
Dave Airlie248dbc22011-11-29 20:02:54 +0000892 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
Jesse Barnes308e5bc2011-11-14 14:51:28 -0800893 &fb->bits_per_pixel);
894 fb->pixel_format = mode_cmd->pixel_format;
Dave Airlief453ba02008-11-07 14:05:41 -0800895
896 return 0;
897}
898EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
899
900int drm_helper_resume_force_mode(struct drm_device *dev)
901{
902 struct drm_crtc *crtc;
David John89347bb2009-12-31 12:00:46 +0530903 struct drm_encoder *encoder;
904 struct drm_encoder_helper_funcs *encoder_funcs;
905 struct drm_crtc_helper_funcs *crtc_funcs;
Dave Airlief453ba02008-11-07 14:05:41 -0800906 int ret;
907
908 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
909
910 if (!crtc->enabled)
911 continue;
912
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500913 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
914 crtc->x, crtc->y, crtc->fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800915
916 if (ret == false)
917 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
David John89347bb2009-12-31 12:00:46 +0530918
919 /* Turn off outputs that were already powered off */
920 if (drm_helper_choose_crtc_dpms(crtc)) {
921 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
922
923 if(encoder->crtc != crtc)
924 continue;
925
926 encoder_funcs = encoder->helper_private;
927 if (encoder_funcs->dpms)
928 (*encoder_funcs->dpms) (encoder,
929 drm_helper_choose_encoder_dpms(encoder));
David John89347bb2009-12-31 12:00:46 +0530930 }
Chris Wilson817e6312010-08-06 15:03:31 +0100931
932 crtc_funcs = crtc->helper_private;
933 if (crtc_funcs->dpms)
934 (*crtc_funcs->dpms) (crtc,
935 drm_helper_choose_crtc_dpms(crtc));
David John89347bb2009-12-31 12:00:46 +0530936 }
Dave Airlief453ba02008-11-07 14:05:41 -0800937 }
Zhao Yakuiaf4fcb52009-07-08 14:13:13 +0800938 /* disable the unused connectors while restoring the modesetting */
939 drm_helper_disable_unused_functions(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800940 return 0;
941}
942EXPORT_SYMBOL(drm_helper_resume_force_mode);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000943
Daniel Vetter3d3683f2012-10-23 18:23:32 +0000944void drm_kms_helper_hotplug_event(struct drm_device *dev)
945{
946 /* send a uevent + call fbdev */
947 drm_sysfs_hotplug_event(dev);
948 if (dev->mode_config.funcs->output_poll_changed)
949 dev->mode_config.funcs->output_poll_changed(dev);
950}
951EXPORT_SYMBOL(drm_kms_helper_hotplug_event);
952
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000953#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
Tejun Heo991ea752010-07-20 22:09:02 +0200954static void output_poll_execute(struct work_struct *work)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000955{
Tejun Heo991ea752010-07-20 22:09:02 +0200956 struct delayed_work *delayed_work = to_delayed_work(work);
957 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000958 struct drm_connector *connector;
Keith Packardc5027de2010-11-26 10:45:59 -0800959 enum drm_connector_status old_status;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000960 bool repoll = false, changed = false;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000961
Chris Wilsone58f6372010-08-20 09:13:36 +0100962 if (!drm_kms_helper_poll)
963 return;
964
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000965 mutex_lock(&dev->mode_config.mutex);
966 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
967
Daniel Vetter11e68682012-10-23 18:23:38 +0000968 /* Ignore forced connectors. */
969 if (connector->force)
970 continue;
971
Daniel Vetter816da852012-10-23 18:23:33 +0000972 /* Ignore HPD capable connectors and connectors where we don't
973 * want any hotplug detection at all for polling. */
974 if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000975 continue;
976
Daniel Vettera4f968d2012-10-24 13:35:50 +0000977 repoll = true;
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000978
979 old_status = connector->status;
980 /* if we are connected and don't want to poll for disconnect
981 skip it */
982 if (old_status == connector_status_connected &&
Daniel Vetter816da852012-10-23 18:23:33 +0000983 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT))
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000984 continue;
985
Keith Packardc5027de2010-11-26 10:45:59 -0800986 connector->status = connector->funcs->detect(connector, false);
Chris Wilson0f168302010-12-21 22:49:28 +0000987 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
988 connector->base.id,
989 drm_get_connector_name(connector),
990 old_status, connector->status);
Keith Packardc5027de2010-11-26 10:45:59 -0800991 if (old_status != connector->status)
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000992 changed = true;
993 }
994
995 mutex_unlock(&dev->mode_config.mutex);
996
Daniel Vetter3d3683f2012-10-23 18:23:32 +0000997 if (changed)
998 drm_kms_helper_hotplug_event(dev);
Dave Airlieeb1f8e42010-05-07 06:42:51 +0000999
Tejun Heo9a919c42010-08-09 12:01:27 +02001000 if (repoll)
Tejun Heo3b07e9c2012-08-20 14:51:24 -07001001 schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD);
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001002}
1003
Dave Airliefbf81762010-06-01 09:09:06 +10001004void drm_kms_helper_poll_disable(struct drm_device *dev)
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001005{
Dave Airliefbf81762010-06-01 09:09:06 +10001006 if (!dev->mode_config.poll_enabled)
1007 return;
Tejun Heo991ea752010-07-20 22:09:02 +02001008 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
Dave Airliefbf81762010-06-01 09:09:06 +10001009}
1010EXPORT_SYMBOL(drm_kms_helper_poll_disable);
1011
1012void drm_kms_helper_poll_enable(struct drm_device *dev)
1013{
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001014 bool poll = false;
Dave Airliefbf81762010-06-01 09:09:06 +10001015 struct drm_connector *connector;
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001016
Chris Wilsone58f6372010-08-20 09:13:36 +01001017 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
1018 return;
1019
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001020 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Daniel Vettera4f968d2012-10-24 13:35:50 +00001021 if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT |
1022 DRM_CONNECTOR_POLL_DISCONNECT))
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001023 poll = true;
1024 }
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001025
Tejun Heo9a919c42010-08-09 12:01:27 +02001026 if (poll)
Tejun Heo3b07e9c2012-08-20 14:51:24 -07001027 schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001028}
Dave Airliefbf81762010-06-01 09:09:06 +10001029EXPORT_SYMBOL(drm_kms_helper_poll_enable);
1030
1031void drm_kms_helper_poll_init(struct drm_device *dev)
1032{
Tejun Heo991ea752010-07-20 22:09:02 +02001033 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
Dave Airliefbf81762010-06-01 09:09:06 +10001034 dev->mode_config.poll_enabled = true;
1035
1036 drm_kms_helper_poll_enable(dev);
1037}
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001038EXPORT_SYMBOL(drm_kms_helper_poll_init);
1039
1040void drm_kms_helper_poll_fini(struct drm_device *dev)
1041{
Dave Airliefbf81762010-06-01 09:09:06 +10001042 drm_kms_helper_poll_disable(dev);
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001043}
1044EXPORT_SYMBOL(drm_kms_helper_poll_fini);
1045
Daniel Vetter69787f72012-10-23 18:23:34 +00001046void drm_helper_hpd_irq_event(struct drm_device *dev)
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001047{
Daniel Vetter816da852012-10-23 18:23:33 +00001048 struct drm_connector *connector;
1049 enum drm_connector_status old_status;
1050 bool changed = false;
1051
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001052 if (!dev->mode_config.poll_enabled)
1053 return;
Chris Wilsone58f6372010-08-20 09:13:36 +01001054
Daniel Vetter816da852012-10-23 18:23:33 +00001055 mutex_lock(&dev->mode_config.mutex);
1056 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
1057
1058 /* Only handle HPD capable connectors. */
1059 if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))
1060 continue;
1061
1062 old_status = connector->status;
1063
1064 connector->status = connector->funcs->detect(connector, false);
1065 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
1066 connector->base.id,
1067 drm_get_connector_name(connector),
1068 old_status, connector->status);
1069 if (old_status != connector->status)
1070 changed = true;
1071 }
1072
1073 mutex_unlock(&dev->mode_config.mutex);
1074
1075 if (changed)
1076 drm_kms_helper_hotplug_event(dev);
1077}
Dave Airlieeb1f8e42010-05-07 06:42:51 +00001078EXPORT_SYMBOL(drm_helper_hpd_irq_event);