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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 | ||
ba6f5826 | 32 | #include <linux/kernel.h> |
2d1a8a48 | 33 | #include <linux/export.h> |
0603ba14 | 34 | #include <linux/moduleparam.h> |
2d1a8a48 | 35 | |
760285e7 | 36 | #include <drm/drmP.h> |
321ebf04 | 37 | #include <drm/drm_atomic.h> |
72fdb40c | 38 | #include <drm/drm_atomic_uapi.h> |
760285e7 | 39 | #include <drm/drm_crtc.h> |
9338203c | 40 | #include <drm/drm_encoder.h> |
760285e7 DH |
41 | #include <drm/drm_fourcc.h> |
42 | #include <drm/drm_crtc_helper.h> | |
43 | #include <drm/drm_fb_helper.h> | |
2f324b42 | 44 | #include <drm/drm_plane_helper.h> |
321ebf04 | 45 | #include <drm/drm_atomic_helper.h> |
760285e7 | 46 | #include <drm/drm_edid.h> |
f453ba04 | 47 | |
3150c7d0 DV |
48 | /** |
49 | * DOC: overview | |
50 | * | |
51 | * The CRTC modeset helper library provides a default set_config implementation | |
52 | * in drm_crtc_helper_set_config(). Plus a few other convenience functions using | |
53 | * the same callbacks which drivers can use to e.g. restore the modeset | |
54 | * configuration on resume with drm_helper_resume_force_mode(). | |
55 | * | |
2be94971 | 56 | * Note that this helper library doesn't track the current power state of CRTCs |
6806cdf9 DV |
57 | * and encoders. It can call callbacks like &drm_encoder_helper_funcs.dpms even |
58 | * though the hardware is already in the desired state. This deficiency has been | |
59 | * fixed in the atomic helpers. | |
2be94971 | 60 | * |
3150c7d0 DV |
61 | * The driver callbacks are mostly compatible with the atomic modeset helpers, |
62 | * except for the handling of the primary plane: Atomic helpers require that the | |
63 | * primary plane is implemented as a real standalone plane and not directly tied | |
64 | * to the CRTC state. For easier transition this library provides functions to | |
65 | * implement the old semantics required by the CRTC helpers using the new plane | |
66 | * and atomic helper callbacks. | |
67 | * | |
68 | * Drivers are strongly urged to convert to the atomic helpers (by way of first | |
69 | * converting to the plane helpers). New drivers must not use these functions | |
70 | * but need to implement the atomic interface instead, potentially using the | |
71 | * atomic helpers for that. | |
092d01da DV |
72 | * |
73 | * These legacy modeset helpers use the same function table structures as | |
74 | * all other modesetting helpers. See the documentation for struct | |
ea0dd85a | 75 | * &drm_crtc_helper_funcs, &struct drm_encoder_helper_funcs and struct |
092d01da | 76 | * &drm_connector_helper_funcs. |
3150c7d0 | 77 | */ |
92b6f89f | 78 | |
c9fb15f6 KP |
79 | /** |
80 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
81 | * @encoder: encoder to check | |
82 | * | |
3fcc42e0 DV |
83 | * Checks whether @encoder is with the current mode setting output configuration |
84 | * in use by any connector. This doesn't mean that it is actually enabled since | |
85 | * the DPMS state is tracked separately. | |
c9fb15f6 | 86 | * |
3fcc42e0 DV |
87 | * Returns: |
88 | * True if @encoder is used, false otherwise. | |
c9fb15f6 KP |
89 | */ |
90 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
91 | { | |
92 | struct drm_connector *connector; | |
c36a3254 | 93 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 | 94 | struct drm_device *dev = encoder->dev; |
62ff94a5 | 95 | |
ba6f5826 SA |
96 | /* |
97 | * We can expect this mutex to be locked if we are not panicking. | |
98 | * Locking is currently fubar in the panic handler. | |
99 | */ | |
8d4ad9d4 | 100 | if (!oops_in_progress) { |
ba6f5826 | 101 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
8d4ad9d4 DA |
102 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
103 | } | |
ba6f5826 | 104 | |
c36a3254 | 105 | |
b982dab1 | 106 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 DV |
107 | drm_for_each_connector_iter(connector, &conn_iter) { |
108 | if (connector->encoder == encoder) { | |
b982dab1 | 109 | drm_connector_list_iter_end(&conn_iter); |
c9fb15f6 | 110 | return true; |
c36a3254 DV |
111 | } |
112 | } | |
b982dab1 | 113 | drm_connector_list_iter_end(&conn_iter); |
c9fb15f6 KP |
114 | return false; |
115 | } | |
116 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
117 | ||
f453ba04 DA |
118 | /** |
119 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
120 | * @crtc: CRTC to check | |
121 | * | |
3fcc42e0 DV |
122 | * Checks whether @crtc is with the current mode setting output configuration |
123 | * in use by any connector. This doesn't mean that it is actually enabled since | |
124 | * the DPMS state is tracked separately. | |
f453ba04 | 125 | * |
3fcc42e0 DV |
126 | * Returns: |
127 | * True if @crtc is used, false otherwise. | |
f453ba04 DA |
128 | */ |
129 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
130 | { | |
131 | struct drm_encoder *encoder; | |
132 | struct drm_device *dev = crtc->dev; | |
62ff94a5 | 133 | |
ba6f5826 SA |
134 | /* |
135 | * We can expect this mutex to be locked if we are not panicking. | |
136 | * Locking is currently fubar in the panic handler. | |
137 | */ | |
138 | if (!oops_in_progress) | |
139 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
140 | ||
e4f62546 | 141 | drm_for_each_encoder(encoder, dev) |
c9fb15f6 | 142 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
143 | return true; |
144 | return false; | |
145 | } | |
146 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
147 | ||
86a1b9d1 BS |
148 | static void |
149 | drm_encoder_disable(struct drm_encoder *encoder) | |
150 | { | |
be26a66d | 151 | const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
86a1b9d1 | 152 | |
75229eca NT |
153 | if (!encoder_funcs) |
154 | return; | |
155 | ||
862e686c | 156 | drm_bridge_disable(encoder->bridge); |
3b336ec4 | 157 | |
86a1b9d1 BS |
158 | if (encoder_funcs->disable) |
159 | (*encoder_funcs->disable)(encoder); | |
75229eca | 160 | else if (encoder_funcs->dpms) |
86a1b9d1 | 161 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
3b336ec4 | 162 | |
862e686c | 163 | drm_bridge_post_disable(encoder->bridge); |
86a1b9d1 BS |
164 | } |
165 | ||
b182cc59 | 166 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
f453ba04 DA |
167 | { |
168 | struct drm_encoder *encoder; | |
f453ba04 DA |
169 | struct drm_crtc *crtc; |
170 | ||
62ff94a5 DV |
171 | drm_warn_on_modeset_not_all_locked(dev); |
172 | ||
6295d607 | 173 | drm_for_each_encoder(encoder, dev) { |
92971021 | 174 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 175 | drm_encoder_disable(encoder); |
b5e6c1da | 176 | /* disconnect encoder from any connector */ |
9c552dd7 | 177 | encoder->crtc = NULL; |
a3a0544b | 178 | } |
f453ba04 DA |
179 | } |
180 | ||
6295d607 | 181 | drm_for_each_crtc(crtc, dev) { |
be26a66d | 182 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
f453ba04 DA |
183 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
184 | if (!crtc->enabled) { | |
5c8d7171 AD |
185 | if (crtc_funcs->disable) |
186 | (*crtc_funcs->disable)(crtc); | |
187 | else | |
188 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f4510a27 | 189 | crtc->primary->fb = NULL; |
f453ba04 DA |
190 | } |
191 | } | |
192 | } | |
b182cc59 DV |
193 | |
194 | /** | |
195 | * drm_helper_disable_unused_functions - disable unused objects | |
196 | * @dev: DRM device | |
197 | * | |
198 | * This function walks through the entire mode setting configuration of @dev. It | |
2be94971 DV |
199 | * will remove any CRTC links of unused encoders and encoder links of |
200 | * disconnected connectors. Then it will disable all unused encoders and CRTCs | |
b182cc59 DV |
201 | * either by calling their disable callback if available or by calling their |
202 | * dpms callback with DRM_MODE_DPMS_OFF. | |
09859d2a DV |
203 | * |
204 | * NOTE: | |
205 | * | |
206 | * This function is part of the legacy modeset helper library and will cause | |
207 | * major confusion with atomic drivers. This is because atomic helpers guarantee | |
208 | * to never call ->disable() hooks on a disabled function, or ->enable() hooks | |
209 | * on an enabled functions. drm_helper_disable_unused_functions() on the other | |
210 | * hand throws such guarantees into the wind and calls disable hooks | |
211 | * unconditionally on unused functions. | |
b182cc59 DV |
212 | */ |
213 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
214 | { | |
6605ca0f DV |
215 | if (drm_core_check_feature(dev, DRIVER_ATOMIC)) |
216 | DRM_ERROR("Called for atomic driver, this is not what you want.\n"); | |
217 | ||
b182cc59 DV |
218 | drm_modeset_lock_all(dev); |
219 | __drm_helper_disable_unused_functions(dev); | |
220 | drm_modeset_unlock_all(dev); | |
221 | } | |
f453ba04 DA |
222 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
223 | ||
7bec756c JB |
224 | /* |
225 | * Check the CRTC we're going to map each output to vs. its current | |
226 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
227 | * since the driver will have to re-route things. | |
228 | */ | |
229 | static void | |
230 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
231 | { | |
be26a66d | 232 | const struct drm_encoder_helper_funcs *encoder_funcs; |
7bec756c JB |
233 | struct drm_encoder *encoder; |
234 | ||
6295d607 | 235 | drm_for_each_encoder(encoder, dev) { |
7bec756c | 236 | encoder_funcs = encoder->helper_private; |
75229eca NT |
237 | if (!encoder_funcs) |
238 | continue; | |
239 | ||
7bec756c JB |
240 | /* Disable unused encoders */ |
241 | if (encoder->crtc == NULL) | |
86a1b9d1 | 242 | drm_encoder_disable(encoder); |
7bec756c JB |
243 | /* Disable encoders whose CRTC is about to change */ |
244 | if (encoder_funcs->get_crtc && | |
245 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 246 | drm_encoder_disable(encoder); |
7bec756c JB |
247 | } |
248 | } | |
249 | ||
f453ba04 | 250 | /** |
0d4ed4c8 | 251 | * drm_crtc_helper_set_mode - internal helper to set a mode |
f453ba04 DA |
252 | * @crtc: CRTC to program |
253 | * @mode: mode to use | |
4c9287c6 AD |
254 | * @x: horizontal offset into the surface |
255 | * @y: vertical offset into the surface | |
0d4ed4c8 | 256 | * @old_fb: old framebuffer, for cleanup |
f453ba04 | 257 | * |
f453ba04 | 258 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
0d4ed4c8 DV |
259 | * to fixup or reject the mode prior to trying to set it. This is an internal |
260 | * helper that drivers could e.g. use to update properties that require the | |
261 | * entire output pipe to be disabled and re-enabled in a new configuration. For | |
262 | * example for changing whether audio is enabled on a hdmi link or for changing | |
263 | * panel fitter or dither attributes. It is also called by the | |
264 | * drm_crtc_helper_set_config() helper function to drive the mode setting | |
265 | * sequence. | |
f453ba04 | 266 | * |
3fcc42e0 DV |
267 | * Returns: |
268 | * True if the mode was set successfully, false otherwise. | |
f453ba04 DA |
269 | */ |
270 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
271 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
272 | int x, int y, |
273 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
274 | { |
275 | struct drm_device *dev = crtc->dev; | |
5a27528a | 276 | struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
be26a66d JN |
277 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
278 | const struct drm_encoder_helper_funcs *encoder_funcs; | |
f453ba04 | 279 | int saved_x, saved_y; |
7e99acdc | 280 | bool saved_enabled; |
f453ba04 DA |
281 | struct drm_encoder *encoder; |
282 | bool ret = true; | |
283 | ||
62ff94a5 DV |
284 | drm_warn_on_modeset_not_all_locked(dev); |
285 | ||
7e99acdc | 286 | saved_enabled = crtc->enabled; |
f453ba04 | 287 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
f453ba04 DA |
288 | if (!crtc->enabled) |
289 | return true; | |
290 | ||
021a8455 | 291 | adjusted_mode = drm_mode_duplicate(dev, mode); |
7e99acdc IH |
292 | if (!adjusted_mode) { |
293 | crtc->enabled = saved_enabled; | |
6bfc56aa | 294 | return false; |
7e99acdc | 295 | } |
021a8455 | 296 | |
f453ba04 | 297 | saved_mode = crtc->mode; |
5a27528a | 298 | saved_hwmode = crtc->hwmode; |
f453ba04 DA |
299 | saved_x = crtc->x; |
300 | saved_y = crtc->y; | |
301 | ||
302 | /* Update crtc values up front so the driver can rely on them for mode | |
303 | * setting. | |
304 | */ | |
305 | crtc->mode = *mode; | |
306 | crtc->x = x; | |
307 | crtc->y = y; | |
308 | ||
f453ba04 DA |
309 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
310 | * adjust it according to limitations or connector properties, and also | |
311 | * a chance to reject the mode entirely. | |
312 | */ | |
6295d607 | 313 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
314 | |
315 | if (encoder->crtc != crtc) | |
316 | continue; | |
3b336ec4 | 317 | |
75229eca NT |
318 | encoder_funcs = encoder->helper_private; |
319 | if (!encoder_funcs) | |
320 | continue; | |
321 | ||
862e686c AT |
322 | ret = drm_bridge_mode_fixup(encoder->bridge, |
323 | mode, adjusted_mode); | |
324 | if (!ret) { | |
325 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
326 | goto done; | |
3b336ec4 SP |
327 | } |
328 | ||
f453ba04 | 329 | encoder_funcs = encoder->helper_private; |
3c5b2673 CP |
330 | if (encoder_funcs->mode_fixup) { |
331 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
332 | adjusted_mode))) { | |
333 | DRM_DEBUG_KMS("Encoder fixup failed\n"); | |
334 | goto done; | |
335 | } | |
f453ba04 DA |
336 | } |
337 | } | |
338 | ||
49f718c5 CP |
339 | if (crtc_funcs->mode_fixup) { |
340 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, | |
341 | adjusted_mode))) { | |
342 | DRM_DEBUG_KMS("CRTC fixup failed\n"); | |
343 | goto done; | |
344 | } | |
f453ba04 | 345 | } |
fa3ab4c2 | 346 | DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); |
f453ba04 | 347 | |
5a27528a DS |
348 | crtc->hwmode = *adjusted_mode; |
349 | ||
f453ba04 | 350 | /* Prepare the encoders and CRTCs before setting the mode. */ |
6295d607 | 351 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
352 | |
353 | if (encoder->crtc != crtc) | |
354 | continue; | |
3b336ec4 | 355 | |
75229eca NT |
356 | encoder_funcs = encoder->helper_private; |
357 | if (!encoder_funcs) | |
358 | continue; | |
359 | ||
862e686c | 360 | drm_bridge_disable(encoder->bridge); |
3b336ec4 | 361 | |
f453ba04 | 362 | /* Disable the encoders as the first thing we do. */ |
75229eca NT |
363 | if (encoder_funcs->prepare) |
364 | encoder_funcs->prepare(encoder); | |
3b336ec4 | 365 | |
862e686c | 366 | drm_bridge_post_disable(encoder->bridge); |
f453ba04 DA |
367 | } |
368 | ||
7bec756c JB |
369 | drm_crtc_prepare_encoders(dev); |
370 | ||
f453ba04 DA |
371 | crtc_funcs->prepare(crtc); |
372 | ||
373 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
374 | * on the DPLL. | |
375 | */ | |
5c3b82e2 CW |
376 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
377 | if (!ret) | |
378 | goto done; | |
f453ba04 | 379 | |
6295d607 | 380 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
381 | |
382 | if (encoder->crtc != crtc) | |
383 | continue; | |
384 | ||
75229eca NT |
385 | encoder_funcs = encoder->helper_private; |
386 | if (!encoder_funcs) | |
387 | continue; | |
388 | ||
9440106b | 389 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
83a8cfd3 | 390 | encoder->base.id, encoder->name, |
9440106b | 391 | mode->base.id, mode->name); |
75229eca NT |
392 | if (encoder_funcs->mode_set) |
393 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
3b336ec4 | 394 | |
862e686c | 395 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
f453ba04 DA |
396 | } |
397 | ||
398 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
399 | crtc_funcs->commit(crtc); | |
400 | ||
6295d607 | 401 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
402 | |
403 | if (encoder->crtc != crtc) | |
404 | continue; | |
405 | ||
75229eca NT |
406 | encoder_funcs = encoder->helper_private; |
407 | if (!encoder_funcs) | |
408 | continue; | |
409 | ||
862e686c | 410 | drm_bridge_pre_enable(encoder->bridge); |
3b336ec4 | 411 | |
75229eca NT |
412 | if (encoder_funcs->commit) |
413 | encoder_funcs->commit(encoder); | |
f453ba04 | 414 | |
862e686c | 415 | drm_bridge_enable(encoder->bridge); |
f453ba04 DA |
416 | } |
417 | ||
27641c3f MK |
418 | /* Calculate and store various constants which |
419 | * are later needed by vblank and swap-completion | |
420 | * timestamping. They are derived from true hwmode. | |
421 | */ | |
545cdd55 | 422 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
27641c3f | 423 | |
f453ba04 DA |
424 | /* FIXME: add subpixel order */ |
425 | done: | |
021a8455 | 426 | drm_mode_destroy(dev, adjusted_mode); |
f453ba04 | 427 | if (!ret) { |
7e99acdc | 428 | crtc->enabled = saved_enabled; |
f453ba04 | 429 | crtc->mode = saved_mode; |
5a27528a | 430 | crtc->hwmode = saved_hwmode; |
f453ba04 DA |
431 | crtc->x = saved_x; |
432 | crtc->y = saved_y; | |
433 | } | |
434 | ||
435 | return ret; | |
436 | } | |
437 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
438 | ||
a74591d7 | 439 | static void |
6eebd6bb CW |
440 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
441 | { | |
442 | struct drm_device *dev = crtc->dev; | |
443 | struct drm_connector *connector; | |
444 | struct drm_encoder *encoder; | |
445 | ||
446 | /* Decouple all encoders and their attached connectors from this crtc */ | |
6295d607 | 447 | drm_for_each_encoder(encoder, dev) { |
c36a3254 DV |
448 | struct drm_connector_list_iter conn_iter; |
449 | ||
6eebd6bb CW |
450 | if (encoder->crtc != crtc) |
451 | continue; | |
452 | ||
b982dab1 | 453 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 454 | drm_for_each_connector_iter(connector, &conn_iter) { |
6eebd6bb CW |
455 | if (connector->encoder != encoder) |
456 | continue; | |
457 | ||
458 | connector->encoder = NULL; | |
a6ad6230 TR |
459 | |
460 | /* | |
461 | * drm_helper_disable_unused_functions() ought to be | |
462 | * doing this, but since we've decoupled the encoder | |
463 | * from the connector above, the required connection | |
464 | * between them is henceforth no longer available. | |
465 | */ | |
466 | connector->dpms = DRM_MODE_DPMS_OFF; | |
0955c125 DA |
467 | |
468 | /* we keep a reference while the encoder is bound */ | |
ad093607 | 469 | drm_connector_put(connector); |
6eebd6bb | 470 | } |
b982dab1 | 471 | drm_connector_list_iter_end(&conn_iter); |
6eebd6bb CW |
472 | } |
473 | ||
b182cc59 | 474 | __drm_helper_disable_unused_functions(dev); |
6eebd6bb CW |
475 | } |
476 | ||
f453ba04 DA |
477 | /** |
478 | * drm_crtc_helper_set_config - set a new config from userspace | |
0d4ed4c8 | 479 | * @set: mode set configuration |
a4eff9aa | 480 | * @ctx: lock acquire context, not used here |
f453ba04 | 481 | * |
6806cdf9 DV |
482 | * The drm_crtc_helper_set_config() helper function implements the of |
483 | * &drm_crtc_funcs.set_config callback for drivers using the legacy CRTC | |
484 | * helpers. | |
2be94971 DV |
485 | * |
486 | * It first tries to locate the best encoder for each connector by calling the | |
6806cdf9 | 487 | * connector @drm_connector_helper_funcs.best_encoder helper operation. |
2be94971 DV |
488 | * |
489 | * After locating the appropriate encoders, the helper function will call the | |
490 | * mode_fixup encoder and CRTC helper operations to adjust the requested mode, | |
491 | * or reject it completely in which case an error will be returned to the | |
492 | * application. If the new configuration after mode adjustment is identical to | |
493 | * the current configuration the helper function will return without performing | |
494 | * any other operation. | |
495 | * | |
496 | * If the adjusted mode is identical to the current mode but changes to the | |
497 | * frame buffer need to be applied, the drm_crtc_helper_set_config() function | |
6806cdf9 | 498 | * will call the CRTC &drm_crtc_helper_funcs.mode_set_base helper operation. |
2be94971 DV |
499 | * |
500 | * If the adjusted mode differs from the current mode, or if the | |
501 | * ->mode_set_base() helper operation is not provided, the helper function | |
502 | * performs a full mode set sequence by calling the ->prepare(), ->mode_set() | |
503 | * and ->commit() CRTC and encoder helper operations, in that order. | |
504 | * Alternatively it can also use the dpms and disable helper operations. For | |
ea0dd85a | 505 | * details see &struct drm_crtc_helper_funcs and struct |
2be94971 DV |
506 | * &drm_encoder_helper_funcs. |
507 | * | |
508 | * This function is deprecated. New drivers must implement atomic modeset | |
509 | * support, for which this function is unsuitable. Instead drivers should use | |
510 | * drm_atomic_helper_set_config(). | |
f453ba04 | 511 | * |
3fcc42e0 DV |
512 | * Returns: |
513 | * Returns 0 on success, negative errno numbers on failure. | |
f453ba04 | 514 | */ |
a4eff9aa DV |
515 | int drm_crtc_helper_set_config(struct drm_mode_set *set, |
516 | struct drm_modeset_acquire_ctx *ctx) | |
f453ba04 DA |
517 | { |
518 | struct drm_device *dev; | |
93f55972 PZ |
519 | struct drm_crtc **save_encoder_crtcs, *new_crtc; |
520 | struct drm_encoder **save_connector_encoders, *new_encoder, *encoder; | |
4cb72b17 JB |
521 | bool mode_changed = false; /* if true do a full mode set */ |
522 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
93f55972 | 523 | struct drm_connector *connector; |
c36a3254 | 524 | struct drm_connector_list_iter conn_iter; |
f453ba04 | 525 | int count = 0, ro, fail = 0; |
be26a66d | 526 | const struct drm_crtc_helper_funcs *crtc_funcs; |
c5006cfe | 527 | struct drm_mode_set save_set; |
4a1b0714 | 528 | int ret; |
bf9dc102 | 529 | int i; |
f453ba04 | 530 | |
58367ed6 | 531 | DRM_DEBUG_KMS("\n"); |
f453ba04 | 532 | |
e58de880 DV |
533 | BUG_ON(!set); |
534 | BUG_ON(!set->crtc); | |
535 | BUG_ON(!set->crtc->helper_private); | |
f453ba04 | 536 | |
e58de880 DV |
537 | /* Enforce sane interface api - has been abused by the fb helper. */ |
538 | BUG_ON(!set->mode && set->fb); | |
539 | BUG_ON(set->fb && set->num_connectors == 0); | |
f453ba04 DA |
540 | |
541 | crtc_funcs = set->crtc->helper_private; | |
542 | ||
ede3ff52 CW |
543 | if (!set->mode) |
544 | set->fb = NULL; | |
545 | ||
9440106b | 546 | if (set->fb) { |
fa3ab4c2 VS |
547 | DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
548 | set->crtc->base.id, set->crtc->name, | |
549 | set->fb->base.id, | |
550 | (int)set->num_connectors, set->x, set->y); | |
9440106b | 551 | } else { |
fa3ab4c2 VS |
552 | DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n", |
553 | set->crtc->base.id, set->crtc->name); | |
a74591d7 TR |
554 | drm_crtc_helper_disable(set->crtc); |
555 | return 0; | |
9440106b | 556 | } |
f453ba04 DA |
557 | |
558 | dev = set->crtc->dev; | |
559 | ||
62ff94a5 DV |
560 | drm_warn_on_modeset_not_all_locked(dev); |
561 | ||
02ee4e94 IH |
562 | /* |
563 | * Allocate space for the backup of all (non-pointer) encoder and | |
564 | * connector data. | |
565 | */ | |
4b947b1c | 566 | save_encoder_crtcs = kcalloc(dev->mode_config.num_encoder, |
93f55972 PZ |
567 | sizeof(struct drm_crtc *), GFP_KERNEL); |
568 | if (!save_encoder_crtcs) | |
f453ba04 | 569 | return -ENOMEM; |
f453ba04 | 570 | |
4b947b1c | 571 | save_connector_encoders = kcalloc(dev->mode_config.num_connector, |
93f55972 PZ |
572 | sizeof(struct drm_encoder *), GFP_KERNEL); |
573 | if (!save_connector_encoders) { | |
574 | kfree(save_encoder_crtcs); | |
e67aae79 MM |
575 | return -ENOMEM; |
576 | } | |
577 | ||
02ee4e94 IH |
578 | /* |
579 | * Copy data. Note that driver private data is not affected. | |
e67aae79 MM |
580 | * Should anything bad happen only the expected state is |
581 | * restored, not the drivers personal bookkeeping. | |
582 | */ | |
e67aae79 | 583 | count = 0; |
6295d607 | 584 | drm_for_each_encoder(encoder, dev) { |
93f55972 | 585 | save_encoder_crtcs[count++] = encoder->crtc; |
e67aae79 MM |
586 | } |
587 | ||
588 | count = 0; | |
b982dab1 | 589 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 590 | drm_for_each_connector_iter(connector, &conn_iter) |
93f55972 | 591 | save_connector_encoders[count++] = connector->encoder; |
b982dab1 | 592 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 593 | |
c5006cfe JB |
594 | save_set.crtc = set->crtc; |
595 | save_set.mode = &set->crtc->mode; | |
596 | save_set.x = set->crtc->x; | |
597 | save_set.y = set->crtc->y; | |
f4510a27 | 598 | save_set.fb = set->crtc->primary->fb; |
c5006cfe | 599 | |
f453ba04 DA |
600 | /* We should be able to check here if the fb has the same properties |
601 | * and then just flip_or_move it */ | |
f4510a27 | 602 | if (set->crtc->primary->fb != set->fb) { |
712531bf | 603 | /* If we have no fb then treat it as a full mode set */ |
f4510a27 | 604 | if (set->crtc->primary->fb == NULL) { |
58367ed6 | 605 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 606 | mode_changed = true; |
dbd4d576 | 607 | } else if (set->fb->format != set->crtc->primary->fb->format) { |
ce83adf7 | 608 | mode_changed = true; |
8dff4742 | 609 | } else |
712531bf | 610 | fb_changed = true; |
f453ba04 DA |
611 | } |
612 | ||
613 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 614 | fb_changed = true; |
f453ba04 | 615 | |
2deafc7e | 616 | if (!drm_mode_equal(set->mode, &set->crtc->mode)) { |
58367ed6 | 617 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
618 | drm_mode_debug_printmodeline(&set->crtc->mode); |
619 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 620 | mode_changed = true; |
f453ba04 DA |
621 | } |
622 | ||
fffc5f59 PZ |
623 | /* take a reference on all unbound connectors in set, reuse the |
624 | * already taken reference for bound connectors | |
625 | */ | |
0955c125 | 626 | for (ro = 0; ro < set->num_connectors; ro++) { |
fffc5f59 PZ |
627 | if (set->connectors[ro]->encoder) |
628 | continue; | |
ad093607 | 629 | drm_connector_get(set->connectors[ro]); |
0955c125 DA |
630 | } |
631 | ||
f453ba04 DA |
632 | /* a) traverse passed in connector list and get encoders for them */ |
633 | count = 0; | |
b982dab1 | 634 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 635 | drm_for_each_connector_iter(connector, &conn_iter) { |
be26a66d | 636 | const struct drm_connector_helper_funcs *connector_funcs = |
f453ba04 | 637 | connector->helper_private; |
f453ba04 DA |
638 | new_encoder = connector->encoder; |
639 | for (ro = 0; ro < set->num_connectors; ro++) { | |
640 | if (set->connectors[ro] == connector) { | |
641 | new_encoder = connector_funcs->best_encoder(connector); | |
642 | /* if we can't get an encoder for a connector | |
643 | we are setting now - then fail */ | |
644 | if (new_encoder == NULL) | |
645 | /* don't break so fail path works correct */ | |
646 | fail = 1; | |
25f397a4 DV |
647 | |
648 | if (connector->dpms != DRM_MODE_DPMS_ON) { | |
649 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); | |
650 | mode_changed = true; | |
651 | } | |
177cf92d DV |
652 | |
653 | break; | |
f453ba04 DA |
654 | } |
655 | } | |
656 | ||
657 | if (new_encoder != connector->encoder) { | |
58367ed6 | 658 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 659 | mode_changed = true; |
ff846ab7 MM |
660 | /* If the encoder is reused for another connector, then |
661 | * the appropriate crtc will be set later. | |
662 | */ | |
ff6fdbed MM |
663 | if (connector->encoder) |
664 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
665 | connector->encoder = new_encoder; |
666 | } | |
667 | } | |
b982dab1 | 668 | drm_connector_list_iter_end(&conn_iter); |
f453ba04 DA |
669 | |
670 | if (fail) { | |
671 | ret = -EINVAL; | |
e67aae79 | 672 | goto fail; |
f453ba04 DA |
673 | } |
674 | ||
675 | count = 0; | |
b982dab1 | 676 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 677 | drm_for_each_connector_iter(connector, &conn_iter) { |
f453ba04 DA |
678 | if (!connector->encoder) |
679 | continue; | |
680 | ||
f453ba04 DA |
681 | if (connector->encoder->crtc == set->crtc) |
682 | new_crtc = NULL; | |
683 | else | |
684 | new_crtc = connector->encoder->crtc; | |
685 | ||
686 | for (ro = 0; ro < set->num_connectors; ro++) { | |
687 | if (set->connectors[ro] == connector) | |
688 | new_crtc = set->crtc; | |
689 | } | |
7bec756c JB |
690 | |
691 | /* Make sure the new CRTC will work with the encoder */ | |
692 | if (new_crtc && | |
693 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
694 | ret = -EINVAL; | |
b982dab1 | 695 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 696 | goto fail; |
7bec756c | 697 | } |
f453ba04 | 698 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 699 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 700 | mode_changed = true; |
f453ba04 DA |
701 | connector->encoder->crtc = new_crtc; |
702 | } | |
9440106b | 703 | if (new_crtc) { |
fa3ab4c2 VS |
704 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n", |
705 | connector->base.id, connector->name, | |
706 | new_crtc->base.id, new_crtc->name); | |
9440106b JG |
707 | } else { |
708 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
fa3ab4c2 | 709 | connector->base.id, connector->name); |
9440106b | 710 | } |
f453ba04 | 711 | } |
b982dab1 | 712 | drm_connector_list_iter_end(&conn_iter); |
f453ba04 DA |
713 | |
714 | /* mode_set_base is not a required function */ | |
712531bf JB |
715 | if (fb_changed && !crtc_funcs->mode_set_base) |
716 | mode_changed = true; | |
f453ba04 | 717 | |
712531bf | 718 | if (mode_changed) { |
48b1f5dd | 719 | if (drm_helper_crtc_in_use(set->crtc)) { |
58367ed6 ZY |
720 | DRM_DEBUG_KMS("attempting to set mode from" |
721 | " userspace\n"); | |
f453ba04 | 722 | drm_mode_debug_printmodeline(set->mode); |
f4510a27 | 723 | set->crtc->primary->fb = set->fb; |
f453ba04 | 724 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
3c4fdcfb | 725 | set->x, set->y, |
bec2eac3 | 726 | save_set.fb)) { |
fa3ab4c2 VS |
727 | DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n", |
728 | set->crtc->base.id, set->crtc->name); | |
f4510a27 | 729 | set->crtc->primary->fb = save_set.fb; |
f453ba04 | 730 | ret = -EINVAL; |
e67aae79 | 731 | goto fail; |
f453ba04 | 732 | } |
25f397a4 DV |
733 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
734 | for (i = 0; i < set->num_connectors; i++) { | |
735 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, | |
25933820 | 736 | set->connectors[i]->name); |
25f397a4 DV |
737 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
738 | } | |
f453ba04 | 739 | } |
b182cc59 | 740 | __drm_helper_disable_unused_functions(dev); |
712531bf | 741 | } else if (fb_changed) { |
9b1596af BS |
742 | set->crtc->x = set->x; |
743 | set->crtc->y = set->y; | |
f4510a27 | 744 | set->crtc->primary->fb = set->fb; |
5c3b82e2 | 745 | ret = crtc_funcs->mode_set_base(set->crtc, |
bec2eac3 | 746 | set->x, set->y, save_set.fb); |
0ba41e44 | 747 | if (ret != 0) { |
fbce4064 IH |
748 | set->crtc->x = save_set.x; |
749 | set->crtc->y = save_set.y; | |
f4510a27 | 750 | set->crtc->primary->fb = save_set.fb; |
e67aae79 | 751 | goto fail; |
0ba41e44 | 752 | } |
f453ba04 DA |
753 | } |
754 | ||
93f55972 PZ |
755 | kfree(save_connector_encoders); |
756 | kfree(save_encoder_crtcs); | |
f453ba04 DA |
757 | return 0; |
758 | ||
e67aae79 MM |
759 | fail: |
760 | /* Restore all previous data. */ | |
e67aae79 | 761 | count = 0; |
6295d607 | 762 | drm_for_each_encoder(encoder, dev) { |
93f55972 | 763 | encoder->crtc = save_encoder_crtcs[count++]; |
e62fb64e | 764 | } |
e67aae79 | 765 | |
f453ba04 | 766 | count = 0; |
b982dab1 | 767 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 768 | drm_for_each_connector_iter(connector, &conn_iter) |
93f55972 | 769 | connector->encoder = save_connector_encoders[count++]; |
b982dab1 | 770 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 771 | |
fffc5f59 PZ |
772 | /* after fail drop reference on all unbound connectors in set, let |
773 | * bound connectors keep their reference | |
774 | */ | |
0955c125 | 775 | for (ro = 0; ro < set->num_connectors; ro++) { |
fffc5f59 PZ |
776 | if (set->connectors[ro]->encoder) |
777 | continue; | |
ad093607 | 778 | drm_connector_put(set->connectors[ro]); |
0955c125 DA |
779 | } |
780 | ||
c5006cfe JB |
781 | /* Try to restore the config */ |
782 | if (mode_changed && | |
783 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, | |
784 | save_set.y, save_set.fb)) | |
785 | DRM_ERROR("failed to restore config after modeset failure\n"); | |
786 | ||
93f55972 PZ |
787 | kfree(save_connector_encoders); |
788 | kfree(save_encoder_crtcs); | |
f453ba04 DA |
789 | return ret; |
790 | } | |
791 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
792 | ||
c9fb15f6 KP |
793 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
794 | { | |
795 | int dpms = DRM_MODE_DPMS_OFF; | |
796 | struct drm_connector *connector; | |
c36a3254 | 797 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 KP |
798 | struct drm_device *dev = encoder->dev; |
799 | ||
b982dab1 | 800 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 801 | drm_for_each_connector_iter(connector, &conn_iter) |
c9fb15f6 KP |
802 | if (connector->encoder == encoder) |
803 | if (connector->dpms < dpms) | |
804 | dpms = connector->dpms; | |
b982dab1 | 805 | drm_connector_list_iter_end(&conn_iter); |
c36a3254 | 806 | |
c9fb15f6 KP |
807 | return dpms; |
808 | } | |
809 | ||
3b336ec4 SP |
810 | /* Helper which handles bridge ordering around encoder dpms */ |
811 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) | |
812 | { | |
813 | struct drm_bridge *bridge = encoder->bridge; | |
be26a66d | 814 | const struct drm_encoder_helper_funcs *encoder_funcs; |
3b336ec4 | 815 | |
75229eca NT |
816 | encoder_funcs = encoder->helper_private; |
817 | if (!encoder_funcs) | |
818 | return; | |
819 | ||
862e686c AT |
820 | if (mode == DRM_MODE_DPMS_ON) |
821 | drm_bridge_pre_enable(bridge); | |
822 | else | |
823 | drm_bridge_disable(bridge); | |
3b336ec4 | 824 | |
3b336ec4 SP |
825 | if (encoder_funcs->dpms) |
826 | encoder_funcs->dpms(encoder, mode); | |
827 | ||
862e686c AT |
828 | if (mode == DRM_MODE_DPMS_ON) |
829 | drm_bridge_enable(bridge); | |
830 | else | |
831 | drm_bridge_post_disable(bridge); | |
3b336ec4 SP |
832 | } |
833 | ||
c9fb15f6 KP |
834 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
835 | { | |
836 | int dpms = DRM_MODE_DPMS_OFF; | |
837 | struct drm_connector *connector; | |
c36a3254 | 838 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 KP |
839 | struct drm_device *dev = crtc->dev; |
840 | ||
b982dab1 | 841 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 842 | drm_for_each_connector_iter(connector, &conn_iter) |
c9fb15f6 KP |
843 | if (connector->encoder && connector->encoder->crtc == crtc) |
844 | if (connector->dpms < dpms) | |
845 | dpms = connector->dpms; | |
b982dab1 | 846 | drm_connector_list_iter_end(&conn_iter); |
c36a3254 | 847 | |
c9fb15f6 KP |
848 | return dpms; |
849 | } | |
850 | ||
851 | /** | |
0d4ed4c8 DV |
852 | * drm_helper_connector_dpms() - connector dpms helper implementation |
853 | * @connector: affected connector | |
854 | * @mode: DPMS mode | |
c9fb15f6 | 855 | * |
6806cdf9 DV |
856 | * The drm_helper_connector_dpms() helper function implements the |
857 | * &drm_connector_funcs.dpms callback for drivers using the legacy CRTC | |
858 | * helpers. | |
2be94971 DV |
859 | * |
860 | * This is the main helper function provided by the CRTC helper framework for | |
0d4ed4c8 | 861 | * implementing the DPMS connector attribute. It computes the new desired DPMS |
6806cdf9 DV |
862 | * state for all encoders and CRTCs in the output mesh and calls the |
863 | * &drm_crtc_helper_funcs.dpms and &drm_encoder_helper_funcs.dpms callbacks | |
864 | * provided by the driver. | |
2be94971 DV |
865 | * |
866 | * This function is deprecated. New drivers must implement atomic modeset | |
144a7999 | 867 | * support, where DPMS is handled in the DRM core. |
9a69a9ac ML |
868 | * |
869 | * Returns: | |
870 | * Always returns 0. | |
c9fb15f6 | 871 | */ |
9a69a9ac | 872 | int drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
c9fb15f6 KP |
873 | { |
874 | struct drm_encoder *encoder = connector->encoder; | |
875 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
3b336ec4 | 876 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
c9fb15f6 KP |
877 | |
878 | if (mode == connector->dpms) | |
9a69a9ac | 879 | return 0; |
c9fb15f6 KP |
880 | |
881 | old_dpms = connector->dpms; | |
882 | connector->dpms = mode; | |
883 | ||
3b336ec4 SP |
884 | if (encoder) |
885 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); | |
886 | ||
c9fb15f6 KP |
887 | /* from off to on, do crtc then encoder */ |
888 | if (mode < old_dpms) { | |
889 | if (crtc) { | |
be26a66d | 890 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
c9fb15f6 KP |
891 | if (crtc_funcs->dpms) |
892 | (*crtc_funcs->dpms) (crtc, | |
893 | drm_helper_choose_crtc_dpms(crtc)); | |
894 | } | |
3b336ec4 SP |
895 | if (encoder) |
896 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
897 | } |
898 | ||
899 | /* from on to off, do encoder then crtc */ | |
900 | if (mode > old_dpms) { | |
3b336ec4 SP |
901 | if (encoder) |
902 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 | 903 | if (crtc) { |
be26a66d | 904 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
c9fb15f6 KP |
905 | if (crtc_funcs->dpms) |
906 | (*crtc_funcs->dpms) (crtc, | |
907 | drm_helper_choose_crtc_dpms(crtc)); | |
908 | } | |
909 | } | |
910 | ||
9a69a9ac | 911 | return 0; |
c9fb15f6 KP |
912 | } |
913 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
914 | ||
aa4cd910 DV |
915 | /** |
916 | * drm_helper_resume_force_mode - force-restore mode setting configuration | |
917 | * @dev: drm_device which should be restored | |
918 | * | |
919 | * Drivers which use the mode setting helpers can use this function to | |
920 | * force-restore the mode setting configuration e.g. on resume or when something | |
921 | * else might have trampled over the hw state (like some overzealous old BIOSen | |
922 | * tended to do). | |
00d762cb DV |
923 | * |
924 | * This helper doesn't provide a error return value since restoring the old | |
925 | * config should never fail due to resource allocation issues since the driver | |
926 | * has successfully set the restored configuration already. Hence this should | |
927 | * boil down to the equivalent of a few dpms on calls, which also don't provide | |
928 | * an error code. | |
929 | * | |
930 | * Drivers where simply restoring an old configuration again might fail (e.g. | |
931 | * due to slight differences in allocating shared resources when the | |
932 | * configuration is restored in a different order than when userspace set it up) | |
933 | * need to use their own restore logic. | |
14942760 TR |
934 | * |
935 | * This function is deprecated. New drivers should implement atomic mode- | |
936 | * setting and use the atomic suspend/resume helpers. | |
937 | * | |
938 | * See also: | |
939 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
aa4cd910 | 940 | */ |
00d762cb | 941 | void drm_helper_resume_force_mode(struct drm_device *dev) |
f453ba04 DA |
942 | { |
943 | struct drm_crtc *crtc; | |
89347bb8 | 944 | struct drm_encoder *encoder; |
be26a66d | 945 | const struct drm_crtc_helper_funcs *crtc_funcs; |
00d762cb DV |
946 | int encoder_dpms; |
947 | bool ret; | |
f453ba04 | 948 | |
3ea87855 | 949 | drm_modeset_lock_all(dev); |
6295d607 | 950 | drm_for_each_crtc(crtc, dev) { |
f453ba04 DA |
951 | |
952 | if (!crtc->enabled) | |
953 | continue; | |
954 | ||
3c4fdcfb | 955 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
f4510a27 | 956 | crtc->x, crtc->y, crtc->primary->fb); |
f453ba04 | 957 | |
00d762cb | 958 | /* Restoring the old config should never fail! */ |
f453ba04 DA |
959 | if (ret == false) |
960 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
961 | |
962 | /* Turn off outputs that were already powered off */ | |
963 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
6295d607 | 964 | drm_for_each_encoder(encoder, dev) { |
89347bb8 DJ |
965 | |
966 | if(encoder->crtc != crtc) | |
967 | continue; | |
968 | ||
3b336ec4 SP |
969 | encoder_dpms = drm_helper_choose_encoder_dpms( |
970 | encoder); | |
971 | ||
972 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
89347bb8 | 973 | } |
817e631e CW |
974 | |
975 | crtc_funcs = crtc->helper_private; | |
976 | if (crtc_funcs->dpms) | |
977 | (*crtc_funcs->dpms) (crtc, | |
978 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 979 | } |
f453ba04 | 980 | } |
00d762cb | 981 | |
af4fcb57 | 982 | /* disable the unused connectors while restoring the modesetting */ |
b182cc59 | 983 | __drm_helper_disable_unused_functions(dev); |
3ea87855 | 984 | drm_modeset_unlock_all(dev); |
f453ba04 DA |
985 | } |
986 | EXPORT_SYMBOL(drm_helper_resume_force_mode); |