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f453ba04 DA |
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 | ||
2d1a8a48 | 32 | #include <linux/export.h> |
0500c04e | 33 | #include <linux/kernel.h> |
0603ba14 | 34 | #include <linux/moduleparam.h> |
2d1a8a48 | 35 | |
321ebf04 | 36 | #include <drm/drm_atomic.h> |
0500c04e | 37 | #include <drm/drm_atomic_helper.h> |
72fdb40c | 38 | #include <drm/drm_atomic_uapi.h> |
ee68c743 | 39 | #include <drm/drm_bridge.h> |
760285e7 | 40 | #include <drm/drm_crtc.h> |
760285e7 | 41 | #include <drm/drm_crtc_helper.h> |
0500c04e SR |
42 | #include <drm/drm_drv.h> |
43 | #include <drm/drm_edid.h> | |
44 | #include <drm/drm_encoder.h> | |
760285e7 | 45 | #include <drm/drm_fb_helper.h> |
0500c04e | 46 | #include <drm/drm_fourcc.h> |
2f324b42 | 47 | #include <drm/drm_plane_helper.h> |
0500c04e SR |
48 | #include <drm/drm_print.h> |
49 | #include <drm/drm_vblank.h> | |
f453ba04 | 50 | |
8dc056ef BG |
51 | #include "drm_crtc_helper_internal.h" |
52 | ||
3150c7d0 DV |
53 | /** |
54 | * DOC: overview | |
55 | * | |
56 | * The CRTC modeset helper library provides a default set_config implementation | |
57 | * in drm_crtc_helper_set_config(). Plus a few other convenience functions using | |
58 | * the same callbacks which drivers can use to e.g. restore the modeset | |
59 | * configuration on resume with drm_helper_resume_force_mode(). | |
60 | * | |
2be94971 | 61 | * Note that this helper library doesn't track the current power state of CRTCs |
6806cdf9 DV |
62 | * and encoders. It can call callbacks like &drm_encoder_helper_funcs.dpms even |
63 | * though the hardware is already in the desired state. This deficiency has been | |
64 | * fixed in the atomic helpers. | |
2be94971 | 65 | * |
3150c7d0 DV |
66 | * The driver callbacks are mostly compatible with the atomic modeset helpers, |
67 | * except for the handling of the primary plane: Atomic helpers require that the | |
68 | * primary plane is implemented as a real standalone plane and not directly tied | |
69 | * to the CRTC state. For easier transition this library provides functions to | |
70 | * implement the old semantics required by the CRTC helpers using the new plane | |
71 | * and atomic helper callbacks. | |
72 | * | |
73 | * Drivers are strongly urged to convert to the atomic helpers (by way of first | |
74 | * converting to the plane helpers). New drivers must not use these functions | |
75 | * but need to implement the atomic interface instead, potentially using the | |
76 | * atomic helpers for that. | |
092d01da DV |
77 | * |
78 | * These legacy modeset helpers use the same function table structures as | |
79 | * all other modesetting helpers. See the documentation for struct | |
ea0dd85a | 80 | * &drm_crtc_helper_funcs, &struct drm_encoder_helper_funcs and struct |
092d01da | 81 | * &drm_connector_helper_funcs. |
3150c7d0 | 82 | */ |
92b6f89f | 83 | |
c9fb15f6 KP |
84 | /** |
85 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
86 | * @encoder: encoder to check | |
87 | * | |
3fcc42e0 DV |
88 | * Checks whether @encoder is with the current mode setting output configuration |
89 | * in use by any connector. This doesn't mean that it is actually enabled since | |
90 | * the DPMS state is tracked separately. | |
c9fb15f6 | 91 | * |
3fcc42e0 DV |
92 | * Returns: |
93 | * True if @encoder is used, false otherwise. | |
c9fb15f6 KP |
94 | */ |
95 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
96 | { | |
97 | struct drm_connector *connector; | |
c36a3254 | 98 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 | 99 | struct drm_device *dev = encoder->dev; |
62ff94a5 | 100 | |
2b5ab0ee DV |
101 | WARN_ON(drm_drv_uses_atomic_modeset(dev)); |
102 | ||
ba6f5826 SA |
103 | /* |
104 | * We can expect this mutex to be locked if we are not panicking. | |
105 | * Locking is currently fubar in the panic handler. | |
106 | */ | |
8d4ad9d4 | 107 | if (!oops_in_progress) { |
ba6f5826 | 108 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
8d4ad9d4 DA |
109 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
110 | } | |
ba6f5826 | 111 | |
c36a3254 | 112 | |
b982dab1 | 113 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 DV |
114 | drm_for_each_connector_iter(connector, &conn_iter) { |
115 | if (connector->encoder == encoder) { | |
b982dab1 | 116 | drm_connector_list_iter_end(&conn_iter); |
c9fb15f6 | 117 | return true; |
c36a3254 DV |
118 | } |
119 | } | |
b982dab1 | 120 | drm_connector_list_iter_end(&conn_iter); |
c9fb15f6 KP |
121 | return false; |
122 | } | |
123 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
124 | ||
f453ba04 DA |
125 | /** |
126 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
127 | * @crtc: CRTC to check | |
128 | * | |
3fcc42e0 DV |
129 | * Checks whether @crtc is with the current mode setting output configuration |
130 | * in use by any connector. This doesn't mean that it is actually enabled since | |
131 | * the DPMS state is tracked separately. | |
f453ba04 | 132 | * |
3fcc42e0 DV |
133 | * Returns: |
134 | * True if @crtc is used, false otherwise. | |
f453ba04 DA |
135 | */ |
136 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
137 | { | |
138 | struct drm_encoder *encoder; | |
139 | struct drm_device *dev = crtc->dev; | |
62ff94a5 | 140 | |
2b5ab0ee DV |
141 | WARN_ON(drm_drv_uses_atomic_modeset(dev)); |
142 | ||
ba6f5826 SA |
143 | /* |
144 | * We can expect this mutex to be locked if we are not panicking. | |
145 | * Locking is currently fubar in the panic handler. | |
146 | */ | |
147 | if (!oops_in_progress) | |
148 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
149 | ||
e4f62546 | 150 | drm_for_each_encoder(encoder, dev) |
c9fb15f6 | 151 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
152 | return true; |
153 | return false; | |
154 | } | |
155 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
156 | ||
86a1b9d1 BS |
157 | static void |
158 | drm_encoder_disable(struct drm_encoder *encoder) | |
159 | { | |
be26a66d | 160 | const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
86a1b9d1 | 161 | |
75229eca NT |
162 | if (!encoder_funcs) |
163 | return; | |
164 | ||
86a1b9d1 BS |
165 | if (encoder_funcs->disable) |
166 | (*encoder_funcs->disable)(encoder); | |
75229eca | 167 | else if (encoder_funcs->dpms) |
86a1b9d1 BS |
168 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
169 | } | |
170 | ||
b182cc59 | 171 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
f453ba04 DA |
172 | { |
173 | struct drm_encoder *encoder; | |
f453ba04 DA |
174 | struct drm_crtc *crtc; |
175 | ||
62ff94a5 DV |
176 | drm_warn_on_modeset_not_all_locked(dev); |
177 | ||
6295d607 | 178 | drm_for_each_encoder(encoder, dev) { |
92971021 | 179 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 180 | drm_encoder_disable(encoder); |
b5e6c1da | 181 | /* disconnect encoder from any connector */ |
9c552dd7 | 182 | encoder->crtc = NULL; |
a3a0544b | 183 | } |
f453ba04 DA |
184 | } |
185 | ||
6295d607 | 186 | drm_for_each_crtc(crtc, dev) { |
be26a66d | 187 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
948de842 | 188 | |
f453ba04 DA |
189 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
190 | if (!crtc->enabled) { | |
5c8d7171 AD |
191 | if (crtc_funcs->disable) |
192 | (*crtc_funcs->disable)(crtc); | |
193 | else | |
194 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f4510a27 | 195 | crtc->primary->fb = NULL; |
f453ba04 DA |
196 | } |
197 | } | |
198 | } | |
b182cc59 DV |
199 | |
200 | /** | |
201 | * drm_helper_disable_unused_functions - disable unused objects | |
202 | * @dev: DRM device | |
203 | * | |
204 | * This function walks through the entire mode setting configuration of @dev. It | |
2be94971 DV |
205 | * will remove any CRTC links of unused encoders and encoder links of |
206 | * disconnected connectors. Then it will disable all unused encoders and CRTCs | |
b182cc59 DV |
207 | * either by calling their disable callback if available or by calling their |
208 | * dpms callback with DRM_MODE_DPMS_OFF. | |
09859d2a DV |
209 | * |
210 | * NOTE: | |
211 | * | |
212 | * This function is part of the legacy modeset helper library and will cause | |
213 | * major confusion with atomic drivers. This is because atomic helpers guarantee | |
214 | * to never call ->disable() hooks on a disabled function, or ->enable() hooks | |
215 | * on an enabled functions. drm_helper_disable_unused_functions() on the other | |
216 | * hand throws such guarantees into the wind and calls disable hooks | |
217 | * unconditionally on unused functions. | |
b182cc59 DV |
218 | */ |
219 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
220 | { | |
2b5ab0ee | 221 | WARN_ON(drm_drv_uses_atomic_modeset(dev)); |
6605ca0f | 222 | |
b182cc59 DV |
223 | drm_modeset_lock_all(dev); |
224 | __drm_helper_disable_unused_functions(dev); | |
225 | drm_modeset_unlock_all(dev); | |
226 | } | |
f453ba04 DA |
227 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
228 | ||
7bec756c JB |
229 | /* |
230 | * Check the CRTC we're going to map each output to vs. its current | |
231 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
232 | * since the driver will have to re-route things. | |
233 | */ | |
234 | static void | |
235 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
236 | { | |
be26a66d | 237 | const struct drm_encoder_helper_funcs *encoder_funcs; |
7bec756c JB |
238 | struct drm_encoder *encoder; |
239 | ||
6295d607 | 240 | drm_for_each_encoder(encoder, dev) { |
7bec756c | 241 | encoder_funcs = encoder->helper_private; |
75229eca NT |
242 | if (!encoder_funcs) |
243 | continue; | |
244 | ||
7bec756c JB |
245 | /* Disable unused encoders */ |
246 | if (encoder->crtc == NULL) | |
86a1b9d1 | 247 | drm_encoder_disable(encoder); |
7bec756c JB |
248 | } |
249 | } | |
250 | ||
f453ba04 | 251 | /** |
0d4ed4c8 | 252 | * drm_crtc_helper_set_mode - internal helper to set a mode |
f453ba04 DA |
253 | * @crtc: CRTC to program |
254 | * @mode: mode to use | |
4c9287c6 AD |
255 | * @x: horizontal offset into the surface |
256 | * @y: vertical offset into the surface | |
0d4ed4c8 | 257 | * @old_fb: old framebuffer, for cleanup |
f453ba04 | 258 | * |
f453ba04 | 259 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
0d4ed4c8 DV |
260 | * to fixup or reject the mode prior to trying to set it. This is an internal |
261 | * helper that drivers could e.g. use to update properties that require the | |
262 | * entire output pipe to be disabled and re-enabled in a new configuration. For | |
263 | * example for changing whether audio is enabled on a hdmi link or for changing | |
264 | * panel fitter or dither attributes. It is also called by the | |
265 | * drm_crtc_helper_set_config() helper function to drive the mode setting | |
266 | * sequence. | |
f453ba04 | 267 | * |
3fcc42e0 DV |
268 | * Returns: |
269 | * True if the mode was set successfully, false otherwise. | |
f453ba04 DA |
270 | */ |
271 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
272 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
273 | int x, int y, |
274 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
275 | { |
276 | struct drm_device *dev = crtc->dev; | |
5a27528a | 277 | struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
be26a66d JN |
278 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
279 | const struct drm_encoder_helper_funcs *encoder_funcs; | |
f453ba04 | 280 | int saved_x, saved_y; |
7e99acdc | 281 | bool saved_enabled; |
f453ba04 DA |
282 | struct drm_encoder *encoder; |
283 | bool ret = true; | |
284 | ||
2b5ab0ee DV |
285 | WARN_ON(drm_drv_uses_atomic_modeset(dev)); |
286 | ||
62ff94a5 DV |
287 | drm_warn_on_modeset_not_all_locked(dev); |
288 | ||
7e99acdc | 289 | saved_enabled = crtc->enabled; |
f453ba04 | 290 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
f453ba04 DA |
291 | if (!crtc->enabled) |
292 | return true; | |
293 | ||
021a8455 | 294 | adjusted_mode = drm_mode_duplicate(dev, mode); |
7e99acdc IH |
295 | if (!adjusted_mode) { |
296 | crtc->enabled = saved_enabled; | |
6bfc56aa | 297 | return false; |
7e99acdc | 298 | } |
021a8455 | 299 | |
f453ba04 | 300 | saved_mode = crtc->mode; |
5a27528a | 301 | saved_hwmode = crtc->hwmode; |
f453ba04 DA |
302 | saved_x = crtc->x; |
303 | saved_y = crtc->y; | |
304 | ||
305 | /* Update crtc values up front so the driver can rely on them for mode | |
306 | * setting. | |
307 | */ | |
308 | crtc->mode = *mode; | |
309 | crtc->x = x; | |
310 | crtc->y = y; | |
311 | ||
f453ba04 DA |
312 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
313 | * adjust it according to limitations or connector properties, and also | |
314 | * a chance to reject the mode entirely. | |
315 | */ | |
6295d607 | 316 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
317 | |
318 | if (encoder->crtc != crtc) | |
319 | continue; | |
3b336ec4 | 320 | |
75229eca NT |
321 | encoder_funcs = encoder->helper_private; |
322 | if (!encoder_funcs) | |
323 | continue; | |
324 | ||
f453ba04 | 325 | encoder_funcs = encoder->helper_private; |
3c5b2673 CP |
326 | if (encoder_funcs->mode_fixup) { |
327 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
328 | adjusted_mode))) { | |
329 | DRM_DEBUG_KMS("Encoder fixup failed\n"); | |
330 | goto done; | |
331 | } | |
f453ba04 DA |
332 | } |
333 | } | |
334 | ||
49f718c5 CP |
335 | if (crtc_funcs->mode_fixup) { |
336 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, | |
337 | adjusted_mode))) { | |
338 | DRM_DEBUG_KMS("CRTC fixup failed\n"); | |
339 | goto done; | |
340 | } | |
f453ba04 | 341 | } |
fa3ab4c2 | 342 | DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); |
f453ba04 | 343 | |
5a27528a DS |
344 | crtc->hwmode = *adjusted_mode; |
345 | ||
f453ba04 | 346 | /* Prepare the encoders and CRTCs before setting the mode. */ |
6295d607 | 347 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
348 | |
349 | if (encoder->crtc != crtc) | |
350 | continue; | |
3b336ec4 | 351 | |
75229eca NT |
352 | encoder_funcs = encoder->helper_private; |
353 | if (!encoder_funcs) | |
354 | continue; | |
355 | ||
f453ba04 | 356 | /* Disable the encoders as the first thing we do. */ |
75229eca NT |
357 | if (encoder_funcs->prepare) |
358 | encoder_funcs->prepare(encoder); | |
f453ba04 DA |
359 | } |
360 | ||
7bec756c JB |
361 | drm_crtc_prepare_encoders(dev); |
362 | ||
f453ba04 DA |
363 | crtc_funcs->prepare(crtc); |
364 | ||
365 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
366 | * on the DPLL. | |
367 | */ | |
5c3b82e2 CW |
368 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
369 | if (!ret) | |
370 | goto done; | |
f453ba04 | 371 | |
6295d607 | 372 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
373 | |
374 | if (encoder->crtc != crtc) | |
375 | continue; | |
376 | ||
75229eca NT |
377 | encoder_funcs = encoder->helper_private; |
378 | if (!encoder_funcs) | |
379 | continue; | |
380 | ||
0e691bc7 SM |
381 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%s]\n", |
382 | encoder->base.id, encoder->name, mode->name); | |
75229eca NT |
383 | if (encoder_funcs->mode_set) |
384 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
f453ba04 DA |
385 | } |
386 | ||
387 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
388 | crtc_funcs->commit(crtc); | |
389 | ||
6295d607 | 390 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
391 | |
392 | if (encoder->crtc != crtc) | |
393 | continue; | |
394 | ||
75229eca NT |
395 | encoder_funcs = encoder->helper_private; |
396 | if (!encoder_funcs) | |
397 | continue; | |
398 | ||
75229eca NT |
399 | if (encoder_funcs->commit) |
400 | encoder_funcs->commit(encoder); | |
f453ba04 DA |
401 | } |
402 | ||
27641c3f MK |
403 | /* Calculate and store various constants which |
404 | * are later needed by vblank and swap-completion | |
405 | * timestamping. They are derived from true hwmode. | |
406 | */ | |
545cdd55 | 407 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
27641c3f | 408 | |
f453ba04 DA |
409 | /* FIXME: add subpixel order */ |
410 | done: | |
021a8455 | 411 | drm_mode_destroy(dev, adjusted_mode); |
f453ba04 | 412 | if (!ret) { |
7e99acdc | 413 | crtc->enabled = saved_enabled; |
f453ba04 | 414 | crtc->mode = saved_mode; |
5a27528a | 415 | crtc->hwmode = saved_hwmode; |
f453ba04 DA |
416 | crtc->x = saved_x; |
417 | crtc->y = saved_y; | |
418 | } | |
419 | ||
420 | return ret; | |
421 | } | |
422 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
423 | ||
a74591d7 | 424 | static void |
6eebd6bb CW |
425 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
426 | { | |
427 | struct drm_device *dev = crtc->dev; | |
428 | struct drm_connector *connector; | |
429 | struct drm_encoder *encoder; | |
430 | ||
431 | /* Decouple all encoders and their attached connectors from this crtc */ | |
6295d607 | 432 | drm_for_each_encoder(encoder, dev) { |
c36a3254 DV |
433 | struct drm_connector_list_iter conn_iter; |
434 | ||
6eebd6bb CW |
435 | if (encoder->crtc != crtc) |
436 | continue; | |
437 | ||
b982dab1 | 438 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 439 | drm_for_each_connector_iter(connector, &conn_iter) { |
6eebd6bb CW |
440 | if (connector->encoder != encoder) |
441 | continue; | |
442 | ||
443 | connector->encoder = NULL; | |
a6ad6230 TR |
444 | |
445 | /* | |
446 | * drm_helper_disable_unused_functions() ought to be | |
447 | * doing this, but since we've decoupled the encoder | |
448 | * from the connector above, the required connection | |
449 | * between them is henceforth no longer available. | |
450 | */ | |
451 | connector->dpms = DRM_MODE_DPMS_OFF; | |
0955c125 DA |
452 | |
453 | /* we keep a reference while the encoder is bound */ | |
ad093607 | 454 | drm_connector_put(connector); |
6eebd6bb | 455 | } |
b982dab1 | 456 | drm_connector_list_iter_end(&conn_iter); |
6eebd6bb CW |
457 | } |
458 | ||
b182cc59 | 459 | __drm_helper_disable_unused_functions(dev); |
6eebd6bb CW |
460 | } |
461 | ||
a92462d6 JRS |
462 | /* |
463 | * For connectors that support multiple encoders, either the | |
464 | * .atomic_best_encoder() or .best_encoder() operation must be implemented. | |
465 | */ | |
466 | struct drm_encoder * | |
467 | drm_connector_get_single_encoder(struct drm_connector *connector) | |
468 | { | |
62afb4ad JRS |
469 | struct drm_encoder *encoder; |
470 | ||
471 | WARN_ON(hweight32(connector->possible_encoders) > 1); | |
472 | drm_connector_for_each_possible_encoder(connector, encoder) | |
473 | return encoder; | |
474 | ||
475 | return NULL; | |
a92462d6 JRS |
476 | } |
477 | ||
f453ba04 DA |
478 | /** |
479 | * drm_crtc_helper_set_config - set a new config from userspace | |
0d4ed4c8 | 480 | * @set: mode set configuration |
a4eff9aa | 481 | * @ctx: lock acquire context, not used here |
f453ba04 | 482 | * |
6806cdf9 DV |
483 | * The drm_crtc_helper_set_config() helper function implements the of |
484 | * &drm_crtc_funcs.set_config callback for drivers using the legacy CRTC | |
485 | * helpers. | |
2be94971 DV |
486 | * |
487 | * It first tries to locate the best encoder for each connector by calling the | |
6806cdf9 | 488 | * connector @drm_connector_helper_funcs.best_encoder helper operation. |
2be94971 DV |
489 | * |
490 | * After locating the appropriate encoders, the helper function will call the | |
491 | * mode_fixup encoder and CRTC helper operations to adjust the requested mode, | |
492 | * or reject it completely in which case an error will be returned to the | |
493 | * application. If the new configuration after mode adjustment is identical to | |
494 | * the current configuration the helper function will return without performing | |
495 | * any other operation. | |
496 | * | |
497 | * If the adjusted mode is identical to the current mode but changes to the | |
498 | * frame buffer need to be applied, the drm_crtc_helper_set_config() function | |
6806cdf9 | 499 | * will call the CRTC &drm_crtc_helper_funcs.mode_set_base helper operation. |
2be94971 DV |
500 | * |
501 | * If the adjusted mode differs from the current mode, or if the | |
502 | * ->mode_set_base() helper operation is not provided, the helper function | |
503 | * performs a full mode set sequence by calling the ->prepare(), ->mode_set() | |
504 | * and ->commit() CRTC and encoder helper operations, in that order. | |
505 | * Alternatively it can also use the dpms and disable helper operations. For | |
ea0dd85a | 506 | * details see &struct drm_crtc_helper_funcs and struct |
2be94971 DV |
507 | * &drm_encoder_helper_funcs. |
508 | * | |
509 | * This function is deprecated. New drivers must implement atomic modeset | |
510 | * support, for which this function is unsuitable. Instead drivers should use | |
511 | * drm_atomic_helper_set_config(). | |
f453ba04 | 512 | * |
3fcc42e0 DV |
513 | * Returns: |
514 | * Returns 0 on success, negative errno numbers on failure. | |
f453ba04 | 515 | */ |
a4eff9aa DV |
516 | int drm_crtc_helper_set_config(struct drm_mode_set *set, |
517 | struct drm_modeset_acquire_ctx *ctx) | |
f453ba04 DA |
518 | { |
519 | struct drm_device *dev; | |
93f55972 PZ |
520 | struct drm_crtc **save_encoder_crtcs, *new_crtc; |
521 | struct drm_encoder **save_connector_encoders, *new_encoder, *encoder; | |
4cb72b17 JB |
522 | bool mode_changed = false; /* if true do a full mode set */ |
523 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
93f55972 | 524 | struct drm_connector *connector; |
c36a3254 | 525 | struct drm_connector_list_iter conn_iter; |
f453ba04 | 526 | int count = 0, ro, fail = 0; |
be26a66d | 527 | const struct drm_crtc_helper_funcs *crtc_funcs; |
c5006cfe | 528 | struct drm_mode_set save_set; |
4a1b0714 | 529 | int ret; |
bf9dc102 | 530 | int i; |
f453ba04 | 531 | |
58367ed6 | 532 | DRM_DEBUG_KMS("\n"); |
f453ba04 | 533 | |
e58de880 DV |
534 | BUG_ON(!set); |
535 | BUG_ON(!set->crtc); | |
536 | BUG_ON(!set->crtc->helper_private); | |
f453ba04 | 537 | |
e58de880 DV |
538 | /* Enforce sane interface api - has been abused by the fb helper. */ |
539 | BUG_ON(!set->mode && set->fb); | |
540 | BUG_ON(set->fb && set->num_connectors == 0); | |
f453ba04 DA |
541 | |
542 | crtc_funcs = set->crtc->helper_private; | |
543 | ||
2b5ab0ee DV |
544 | dev = set->crtc->dev; |
545 | WARN_ON(drm_drv_uses_atomic_modeset(dev)); | |
546 | ||
ede3ff52 CW |
547 | if (!set->mode) |
548 | set->fb = NULL; | |
549 | ||
9440106b | 550 | if (set->fb) { |
fa3ab4c2 VS |
551 | DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
552 | set->crtc->base.id, set->crtc->name, | |
553 | set->fb->base.id, | |
554 | (int)set->num_connectors, set->x, set->y); | |
9440106b | 555 | } else { |
fa3ab4c2 VS |
556 | DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n", |
557 | set->crtc->base.id, set->crtc->name); | |
a74591d7 TR |
558 | drm_crtc_helper_disable(set->crtc); |
559 | return 0; | |
9440106b | 560 | } |
f453ba04 | 561 | |
62ff94a5 DV |
562 | drm_warn_on_modeset_not_all_locked(dev); |
563 | ||
02ee4e94 IH |
564 | /* |
565 | * Allocate space for the backup of all (non-pointer) encoder and | |
566 | * connector data. | |
567 | */ | |
4b947b1c | 568 | save_encoder_crtcs = kcalloc(dev->mode_config.num_encoder, |
93f55972 PZ |
569 | sizeof(struct drm_crtc *), GFP_KERNEL); |
570 | if (!save_encoder_crtcs) | |
f453ba04 | 571 | return -ENOMEM; |
f453ba04 | 572 | |
4b947b1c | 573 | save_connector_encoders = kcalloc(dev->mode_config.num_connector, |
93f55972 PZ |
574 | sizeof(struct drm_encoder *), GFP_KERNEL); |
575 | if (!save_connector_encoders) { | |
576 | kfree(save_encoder_crtcs); | |
e67aae79 MM |
577 | return -ENOMEM; |
578 | } | |
579 | ||
02ee4e94 IH |
580 | /* |
581 | * Copy data. Note that driver private data is not affected. | |
e67aae79 MM |
582 | * Should anything bad happen only the expected state is |
583 | * restored, not the drivers personal bookkeeping. | |
584 | */ | |
e67aae79 | 585 | count = 0; |
6295d607 | 586 | drm_for_each_encoder(encoder, dev) { |
93f55972 | 587 | save_encoder_crtcs[count++] = encoder->crtc; |
e67aae79 MM |
588 | } |
589 | ||
590 | count = 0; | |
b982dab1 | 591 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 592 | drm_for_each_connector_iter(connector, &conn_iter) |
93f55972 | 593 | save_connector_encoders[count++] = connector->encoder; |
b982dab1 | 594 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 595 | |
c5006cfe JB |
596 | save_set.crtc = set->crtc; |
597 | save_set.mode = &set->crtc->mode; | |
598 | save_set.x = set->crtc->x; | |
599 | save_set.y = set->crtc->y; | |
f4510a27 | 600 | save_set.fb = set->crtc->primary->fb; |
c5006cfe | 601 | |
f453ba04 DA |
602 | /* We should be able to check here if the fb has the same properties |
603 | * and then just flip_or_move it */ | |
f4510a27 | 604 | if (set->crtc->primary->fb != set->fb) { |
712531bf | 605 | /* If we have no fb then treat it as a full mode set */ |
f4510a27 | 606 | if (set->crtc->primary->fb == NULL) { |
58367ed6 | 607 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 608 | mode_changed = true; |
dbd4d576 | 609 | } else if (set->fb->format != set->crtc->primary->fb->format) { |
ce83adf7 | 610 | mode_changed = true; |
8dff4742 | 611 | } else |
712531bf | 612 | fb_changed = true; |
f453ba04 DA |
613 | } |
614 | ||
615 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 616 | fb_changed = true; |
f453ba04 | 617 | |
2deafc7e | 618 | if (!drm_mode_equal(set->mode, &set->crtc->mode)) { |
58367ed6 | 619 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
620 | drm_mode_debug_printmodeline(&set->crtc->mode); |
621 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 622 | mode_changed = true; |
f453ba04 DA |
623 | } |
624 | ||
fffc5f59 PZ |
625 | /* take a reference on all unbound connectors in set, reuse the |
626 | * already taken reference for bound connectors | |
627 | */ | |
0955c125 | 628 | for (ro = 0; ro < set->num_connectors; ro++) { |
fffc5f59 PZ |
629 | if (set->connectors[ro]->encoder) |
630 | continue; | |
ad093607 | 631 | drm_connector_get(set->connectors[ro]); |
0955c125 DA |
632 | } |
633 | ||
f453ba04 DA |
634 | /* a) traverse passed in connector list and get encoders for them */ |
635 | count = 0; | |
b982dab1 | 636 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 637 | drm_for_each_connector_iter(connector, &conn_iter) { |
be26a66d | 638 | const struct drm_connector_helper_funcs *connector_funcs = |
f453ba04 | 639 | connector->helper_private; |
f453ba04 DA |
640 | new_encoder = connector->encoder; |
641 | for (ro = 0; ro < set->num_connectors; ro++) { | |
642 | if (set->connectors[ro] == connector) { | |
a92462d6 JRS |
643 | if (connector_funcs->best_encoder) |
644 | new_encoder = connector_funcs->best_encoder(connector); | |
645 | else | |
646 | new_encoder = drm_connector_get_single_encoder(connector); | |
647 | ||
f453ba04 DA |
648 | /* if we can't get an encoder for a connector |
649 | we are setting now - then fail */ | |
650 | if (new_encoder == NULL) | |
651 | /* don't break so fail path works correct */ | |
652 | fail = 1; | |
25f397a4 DV |
653 | |
654 | if (connector->dpms != DRM_MODE_DPMS_ON) { | |
655 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); | |
656 | mode_changed = true; | |
657 | } | |
177cf92d DV |
658 | |
659 | break; | |
f453ba04 DA |
660 | } |
661 | } | |
662 | ||
663 | if (new_encoder != connector->encoder) { | |
58367ed6 | 664 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 665 | mode_changed = true; |
ff846ab7 MM |
666 | /* If the encoder is reused for another connector, then |
667 | * the appropriate crtc will be set later. | |
668 | */ | |
ff6fdbed MM |
669 | if (connector->encoder) |
670 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
671 | connector->encoder = new_encoder; |
672 | } | |
673 | } | |
b982dab1 | 674 | drm_connector_list_iter_end(&conn_iter); |
f453ba04 DA |
675 | |
676 | if (fail) { | |
677 | ret = -EINVAL; | |
e67aae79 | 678 | goto fail; |
f453ba04 DA |
679 | } |
680 | ||
681 | count = 0; | |
b982dab1 | 682 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 683 | drm_for_each_connector_iter(connector, &conn_iter) { |
f453ba04 DA |
684 | if (!connector->encoder) |
685 | continue; | |
686 | ||
f453ba04 DA |
687 | if (connector->encoder->crtc == set->crtc) |
688 | new_crtc = NULL; | |
689 | else | |
690 | new_crtc = connector->encoder->crtc; | |
691 | ||
692 | for (ro = 0; ro < set->num_connectors; ro++) { | |
693 | if (set->connectors[ro] == connector) | |
694 | new_crtc = set->crtc; | |
695 | } | |
7bec756c JB |
696 | |
697 | /* Make sure the new CRTC will work with the encoder */ | |
698 | if (new_crtc && | |
699 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
700 | ret = -EINVAL; | |
b982dab1 | 701 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 702 | goto fail; |
7bec756c | 703 | } |
f453ba04 | 704 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 705 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 706 | mode_changed = true; |
f453ba04 DA |
707 | connector->encoder->crtc = new_crtc; |
708 | } | |
9440106b | 709 | if (new_crtc) { |
fa3ab4c2 VS |
710 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n", |
711 | connector->base.id, connector->name, | |
712 | new_crtc->base.id, new_crtc->name); | |
9440106b JG |
713 | } else { |
714 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
fa3ab4c2 | 715 | connector->base.id, connector->name); |
9440106b | 716 | } |
f453ba04 | 717 | } |
b982dab1 | 718 | drm_connector_list_iter_end(&conn_iter); |
f453ba04 DA |
719 | |
720 | /* mode_set_base is not a required function */ | |
712531bf JB |
721 | if (fb_changed && !crtc_funcs->mode_set_base) |
722 | mode_changed = true; | |
f453ba04 | 723 | |
712531bf | 724 | if (mode_changed) { |
48b1f5dd | 725 | if (drm_helper_crtc_in_use(set->crtc)) { |
58367ed6 ZY |
726 | DRM_DEBUG_KMS("attempting to set mode from" |
727 | " userspace\n"); | |
f453ba04 | 728 | drm_mode_debug_printmodeline(set->mode); |
f4510a27 | 729 | set->crtc->primary->fb = set->fb; |
f453ba04 | 730 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
3c4fdcfb | 731 | set->x, set->y, |
bec2eac3 | 732 | save_set.fb)) { |
fa3ab4c2 VS |
733 | DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n", |
734 | set->crtc->base.id, set->crtc->name); | |
f4510a27 | 735 | set->crtc->primary->fb = save_set.fb; |
f453ba04 | 736 | ret = -EINVAL; |
e67aae79 | 737 | goto fail; |
f453ba04 | 738 | } |
25f397a4 DV |
739 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
740 | for (i = 0; i < set->num_connectors; i++) { | |
741 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, | |
25933820 | 742 | set->connectors[i]->name); |
25f397a4 DV |
743 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
744 | } | |
f453ba04 | 745 | } |
b182cc59 | 746 | __drm_helper_disable_unused_functions(dev); |
712531bf | 747 | } else if (fb_changed) { |
9b1596af BS |
748 | set->crtc->x = set->x; |
749 | set->crtc->y = set->y; | |
f4510a27 | 750 | set->crtc->primary->fb = set->fb; |
5c3b82e2 | 751 | ret = crtc_funcs->mode_set_base(set->crtc, |
bec2eac3 | 752 | set->x, set->y, save_set.fb); |
0ba41e44 | 753 | if (ret != 0) { |
fbce4064 IH |
754 | set->crtc->x = save_set.x; |
755 | set->crtc->y = save_set.y; | |
f4510a27 | 756 | set->crtc->primary->fb = save_set.fb; |
e67aae79 | 757 | goto fail; |
0ba41e44 | 758 | } |
f453ba04 DA |
759 | } |
760 | ||
93f55972 PZ |
761 | kfree(save_connector_encoders); |
762 | kfree(save_encoder_crtcs); | |
f453ba04 DA |
763 | return 0; |
764 | ||
e67aae79 MM |
765 | fail: |
766 | /* Restore all previous data. */ | |
e67aae79 | 767 | count = 0; |
6295d607 | 768 | drm_for_each_encoder(encoder, dev) { |
93f55972 | 769 | encoder->crtc = save_encoder_crtcs[count++]; |
e62fb64e | 770 | } |
e67aae79 | 771 | |
f453ba04 | 772 | count = 0; |
b982dab1 | 773 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 774 | drm_for_each_connector_iter(connector, &conn_iter) |
93f55972 | 775 | connector->encoder = save_connector_encoders[count++]; |
b982dab1 | 776 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 777 | |
fffc5f59 PZ |
778 | /* after fail drop reference on all unbound connectors in set, let |
779 | * bound connectors keep their reference | |
780 | */ | |
0955c125 | 781 | for (ro = 0; ro < set->num_connectors; ro++) { |
fffc5f59 PZ |
782 | if (set->connectors[ro]->encoder) |
783 | continue; | |
ad093607 | 784 | drm_connector_put(set->connectors[ro]); |
0955c125 DA |
785 | } |
786 | ||
c5006cfe JB |
787 | /* Try to restore the config */ |
788 | if (mode_changed && | |
789 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, | |
790 | save_set.y, save_set.fb)) | |
791 | DRM_ERROR("failed to restore config after modeset failure\n"); | |
792 | ||
93f55972 PZ |
793 | kfree(save_connector_encoders); |
794 | kfree(save_encoder_crtcs); | |
f453ba04 DA |
795 | return ret; |
796 | } | |
797 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
798 | ||
c9fb15f6 KP |
799 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
800 | { | |
801 | int dpms = DRM_MODE_DPMS_OFF; | |
802 | struct drm_connector *connector; | |
c36a3254 | 803 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 KP |
804 | struct drm_device *dev = encoder->dev; |
805 | ||
b982dab1 | 806 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 807 | drm_for_each_connector_iter(connector, &conn_iter) |
c9fb15f6 KP |
808 | if (connector->encoder == encoder) |
809 | if (connector->dpms < dpms) | |
810 | dpms = connector->dpms; | |
b982dab1 | 811 | drm_connector_list_iter_end(&conn_iter); |
c36a3254 | 812 | |
c9fb15f6 KP |
813 | return dpms; |
814 | } | |
815 | ||
3b336ec4 SP |
816 | /* Helper which handles bridge ordering around encoder dpms */ |
817 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) | |
818 | { | |
be26a66d | 819 | const struct drm_encoder_helper_funcs *encoder_funcs; |
3b336ec4 | 820 | |
75229eca NT |
821 | encoder_funcs = encoder->helper_private; |
822 | if (!encoder_funcs) | |
823 | return; | |
824 | ||
3b336ec4 SP |
825 | if (encoder_funcs->dpms) |
826 | encoder_funcs->dpms(encoder, mode); | |
3b336ec4 SP |
827 | } |
828 | ||
c9fb15f6 KP |
829 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
830 | { | |
831 | int dpms = DRM_MODE_DPMS_OFF; | |
832 | struct drm_connector *connector; | |
c36a3254 | 833 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 KP |
834 | struct drm_device *dev = crtc->dev; |
835 | ||
b982dab1 | 836 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 837 | drm_for_each_connector_iter(connector, &conn_iter) |
c9fb15f6 KP |
838 | if (connector->encoder && connector->encoder->crtc == crtc) |
839 | if (connector->dpms < dpms) | |
840 | dpms = connector->dpms; | |
b982dab1 | 841 | drm_connector_list_iter_end(&conn_iter); |
c36a3254 | 842 | |
c9fb15f6 KP |
843 | return dpms; |
844 | } | |
845 | ||
846 | /** | |
0d4ed4c8 DV |
847 | * drm_helper_connector_dpms() - connector dpms helper implementation |
848 | * @connector: affected connector | |
849 | * @mode: DPMS mode | |
c9fb15f6 | 850 | * |
6806cdf9 DV |
851 | * The drm_helper_connector_dpms() helper function implements the |
852 | * &drm_connector_funcs.dpms callback for drivers using the legacy CRTC | |
853 | * helpers. | |
2be94971 DV |
854 | * |
855 | * This is the main helper function provided by the CRTC helper framework for | |
0d4ed4c8 | 856 | * implementing the DPMS connector attribute. It computes the new desired DPMS |
6806cdf9 DV |
857 | * state for all encoders and CRTCs in the output mesh and calls the |
858 | * &drm_crtc_helper_funcs.dpms and &drm_encoder_helper_funcs.dpms callbacks | |
859 | * provided by the driver. | |
2be94971 DV |
860 | * |
861 | * This function is deprecated. New drivers must implement atomic modeset | |
144a7999 | 862 | * support, where DPMS is handled in the DRM core. |
9a69a9ac ML |
863 | * |
864 | * Returns: | |
865 | * Always returns 0. | |
c9fb15f6 | 866 | */ |
9a69a9ac | 867 | int drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
c9fb15f6 KP |
868 | { |
869 | struct drm_encoder *encoder = connector->encoder; | |
870 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
3b336ec4 | 871 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
c9fb15f6 | 872 | |
2b5ab0ee DV |
873 | WARN_ON(drm_drv_uses_atomic_modeset(connector->dev)); |
874 | ||
c9fb15f6 | 875 | if (mode == connector->dpms) |
9a69a9ac | 876 | return 0; |
c9fb15f6 KP |
877 | |
878 | old_dpms = connector->dpms; | |
879 | connector->dpms = mode; | |
880 | ||
3b336ec4 SP |
881 | if (encoder) |
882 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); | |
883 | ||
c9fb15f6 KP |
884 | /* from off to on, do crtc then encoder */ |
885 | if (mode < old_dpms) { | |
886 | if (crtc) { | |
be26a66d | 887 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
948de842 | 888 | |
c9fb15f6 KP |
889 | if (crtc_funcs->dpms) |
890 | (*crtc_funcs->dpms) (crtc, | |
891 | drm_helper_choose_crtc_dpms(crtc)); | |
892 | } | |
3b336ec4 SP |
893 | if (encoder) |
894 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
895 | } |
896 | ||
897 | /* from on to off, do encoder then crtc */ | |
898 | if (mode > old_dpms) { | |
3b336ec4 SP |
899 | if (encoder) |
900 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 | 901 | if (crtc) { |
be26a66d | 902 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
948de842 | 903 | |
c9fb15f6 KP |
904 | if (crtc_funcs->dpms) |
905 | (*crtc_funcs->dpms) (crtc, | |
906 | drm_helper_choose_crtc_dpms(crtc)); | |
907 | } | |
908 | } | |
909 | ||
9a69a9ac | 910 | return 0; |
c9fb15f6 KP |
911 | } |
912 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
913 | ||
aa4cd910 DV |
914 | /** |
915 | * drm_helper_resume_force_mode - force-restore mode setting configuration | |
916 | * @dev: drm_device which should be restored | |
917 | * | |
918 | * Drivers which use the mode setting helpers can use this function to | |
919 | * force-restore the mode setting configuration e.g. on resume or when something | |
920 | * else might have trampled over the hw state (like some overzealous old BIOSen | |
921 | * tended to do). | |
00d762cb DV |
922 | * |
923 | * This helper doesn't provide a error return value since restoring the old | |
924 | * config should never fail due to resource allocation issues since the driver | |
925 | * has successfully set the restored configuration already. Hence this should | |
926 | * boil down to the equivalent of a few dpms on calls, which also don't provide | |
927 | * an error code. | |
928 | * | |
929 | * Drivers where simply restoring an old configuration again might fail (e.g. | |
930 | * due to slight differences in allocating shared resources when the | |
931 | * configuration is restored in a different order than when userspace set it up) | |
932 | * need to use their own restore logic. | |
14942760 TR |
933 | * |
934 | * This function is deprecated. New drivers should implement atomic mode- | |
935 | * setting and use the atomic suspend/resume helpers. | |
936 | * | |
937 | * See also: | |
938 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
aa4cd910 | 939 | */ |
00d762cb | 940 | void drm_helper_resume_force_mode(struct drm_device *dev) |
f453ba04 DA |
941 | { |
942 | struct drm_crtc *crtc; | |
89347bb8 | 943 | struct drm_encoder *encoder; |
be26a66d | 944 | const struct drm_crtc_helper_funcs *crtc_funcs; |
00d762cb DV |
945 | int encoder_dpms; |
946 | bool ret; | |
f453ba04 | 947 | |
2b5ab0ee DV |
948 | WARN_ON(drm_drv_uses_atomic_modeset(dev)); |
949 | ||
3ea87855 | 950 | drm_modeset_lock_all(dev); |
6295d607 | 951 | drm_for_each_crtc(crtc, dev) { |
f453ba04 DA |
952 | |
953 | if (!crtc->enabled) | |
954 | continue; | |
955 | ||
3c4fdcfb | 956 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
f4510a27 | 957 | crtc->x, crtc->y, crtc->primary->fb); |
f453ba04 | 958 | |
00d762cb | 959 | /* Restoring the old config should never fail! */ |
f453ba04 DA |
960 | if (ret == false) |
961 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
962 | |
963 | /* Turn off outputs that were already powered off */ | |
964 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
6295d607 | 965 | drm_for_each_encoder(encoder, dev) { |
89347bb8 DJ |
966 | |
967 | if(encoder->crtc != crtc) | |
968 | continue; | |
969 | ||
3b336ec4 SP |
970 | encoder_dpms = drm_helper_choose_encoder_dpms( |
971 | encoder); | |
972 | ||
973 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
89347bb8 | 974 | } |
817e631e CW |
975 | |
976 | crtc_funcs = crtc->helper_private; | |
977 | if (crtc_funcs->dpms) | |
978 | (*crtc_funcs->dpms) (crtc, | |
979 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 980 | } |
f453ba04 | 981 | } |
00d762cb | 982 | |
af4fcb57 | 983 | /* disable the unused connectors while restoring the modesetting */ |
b182cc59 | 984 | __drm_helper_disable_unused_functions(dev); |
3ea87855 | 985 | drm_modeset_unlock_all(dev); |
f453ba04 DA |
986 | } |
987 | EXPORT_SYMBOL(drm_helper_resume_force_mode); | |
c2d88e06 DV |
988 | |
989 | /** | |
990 | * drm_helper_force_disable_all - Forcibly turn off all enabled CRTCs | |
991 | * @dev: DRM device whose CRTCs to turn off | |
992 | * | |
993 | * Drivers may want to call this on unload to ensure that all displays are | |
994 | * unlit and the GPU is in a consistent, low power state. Takes modeset locks. | |
995 | * | |
996 | * Note: This should only be used by non-atomic legacy drivers. For an atomic | |
997 | * version look at drm_atomic_helper_shutdown(). | |
998 | * | |
999 | * Returns: | |
1000 | * Zero on success, error code on failure. | |
1001 | */ | |
1002 | int drm_helper_force_disable_all(struct drm_device *dev) | |
1003 | { | |
1004 | struct drm_crtc *crtc; | |
1005 | int ret = 0; | |
1006 | ||
1007 | drm_modeset_lock_all(dev); | |
1008 | drm_for_each_crtc(crtc, dev) | |
1009 | if (crtc->enabled) { | |
1010 | struct drm_mode_set set = { | |
1011 | .crtc = crtc, | |
1012 | }; | |
1013 | ||
1014 | ret = drm_mode_set_config_internal(&set); | |
1015 | if (ret) | |
1016 | goto out; | |
1017 | } | |
1018 | out: | |
1019 | drm_modeset_unlock_all(dev); | |
1020 | return ret; | |
1021 | } | |
1022 | EXPORT_SYMBOL(drm_helper_force_disable_all); |