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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> |
760285e7 | 38 | #include <drm/drm_crtc.h> |
9338203c | 39 | #include <drm/drm_encoder.h> |
760285e7 DH |
40 | #include <drm/drm_fourcc.h> |
41 | #include <drm/drm_crtc_helper.h> | |
42 | #include <drm/drm_fb_helper.h> | |
2f324b42 | 43 | #include <drm/drm_plane_helper.h> |
321ebf04 | 44 | #include <drm/drm_atomic_helper.h> |
760285e7 | 45 | #include <drm/drm_edid.h> |
f453ba04 | 46 | |
3150c7d0 DV |
47 | /** |
48 | * DOC: overview | |
49 | * | |
50 | * The CRTC modeset helper library provides a default set_config implementation | |
51 | * in drm_crtc_helper_set_config(). Plus a few other convenience functions using | |
52 | * the same callbacks which drivers can use to e.g. restore the modeset | |
53 | * configuration on resume with drm_helper_resume_force_mode(). | |
54 | * | |
2be94971 | 55 | * Note that this helper library doesn't track the current power state of CRTCs |
6806cdf9 DV |
56 | * and encoders. It can call callbacks like &drm_encoder_helper_funcs.dpms even |
57 | * though the hardware is already in the desired state. This deficiency has been | |
58 | * fixed in the atomic helpers. | |
2be94971 | 59 | * |
3150c7d0 DV |
60 | * The driver callbacks are mostly compatible with the atomic modeset helpers, |
61 | * except for the handling of the primary plane: Atomic helpers require that the | |
62 | * primary plane is implemented as a real standalone plane and not directly tied | |
63 | * to the CRTC state. For easier transition this library provides functions to | |
64 | * implement the old semantics required by the CRTC helpers using the new plane | |
65 | * and atomic helper callbacks. | |
66 | * | |
67 | * Drivers are strongly urged to convert to the atomic helpers (by way of first | |
68 | * converting to the plane helpers). New drivers must not use these functions | |
69 | * but need to implement the atomic interface instead, potentially using the | |
70 | * atomic helpers for that. | |
092d01da DV |
71 | * |
72 | * These legacy modeset helpers use the same function table structures as | |
73 | * all other modesetting helpers. See the documentation for struct | |
ea0dd85a | 74 | * &drm_crtc_helper_funcs, &struct drm_encoder_helper_funcs and struct |
092d01da | 75 | * &drm_connector_helper_funcs. |
3150c7d0 | 76 | */ |
92b6f89f | 77 | |
c9fb15f6 KP |
78 | /** |
79 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
80 | * @encoder: encoder to check | |
81 | * | |
3fcc42e0 DV |
82 | * Checks whether @encoder is with the current mode setting output configuration |
83 | * in use by any connector. This doesn't mean that it is actually enabled since | |
84 | * the DPMS state is tracked separately. | |
c9fb15f6 | 85 | * |
3fcc42e0 DV |
86 | * Returns: |
87 | * True if @encoder is used, false otherwise. | |
c9fb15f6 KP |
88 | */ |
89 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
90 | { | |
91 | struct drm_connector *connector; | |
c36a3254 | 92 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 | 93 | struct drm_device *dev = encoder->dev; |
62ff94a5 | 94 | |
ba6f5826 SA |
95 | /* |
96 | * We can expect this mutex to be locked if we are not panicking. | |
97 | * Locking is currently fubar in the panic handler. | |
98 | */ | |
8d4ad9d4 | 99 | if (!oops_in_progress) { |
ba6f5826 | 100 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
8d4ad9d4 DA |
101 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
102 | } | |
ba6f5826 | 103 | |
c36a3254 | 104 | |
b982dab1 | 105 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 DV |
106 | drm_for_each_connector_iter(connector, &conn_iter) { |
107 | if (connector->encoder == encoder) { | |
b982dab1 | 108 | drm_connector_list_iter_end(&conn_iter); |
c9fb15f6 | 109 | return true; |
c36a3254 DV |
110 | } |
111 | } | |
b982dab1 | 112 | drm_connector_list_iter_end(&conn_iter); |
c9fb15f6 KP |
113 | return false; |
114 | } | |
115 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
116 | ||
f453ba04 DA |
117 | /** |
118 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
119 | * @crtc: CRTC to check | |
120 | * | |
3fcc42e0 DV |
121 | * Checks whether @crtc is with the current mode setting output configuration |
122 | * in use by any connector. This doesn't mean that it is actually enabled since | |
123 | * the DPMS state is tracked separately. | |
f453ba04 | 124 | * |
3fcc42e0 DV |
125 | * Returns: |
126 | * True if @crtc is used, false otherwise. | |
f453ba04 DA |
127 | */ |
128 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
129 | { | |
130 | struct drm_encoder *encoder; | |
131 | struct drm_device *dev = crtc->dev; | |
62ff94a5 | 132 | |
ba6f5826 SA |
133 | /* |
134 | * We can expect this mutex to be locked if we are not panicking. | |
135 | * Locking is currently fubar in the panic handler. | |
136 | */ | |
137 | if (!oops_in_progress) | |
138 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
139 | ||
e4f62546 | 140 | drm_for_each_encoder(encoder, dev) |
c9fb15f6 | 141 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
142 | return true; |
143 | return false; | |
144 | } | |
145 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
146 | ||
86a1b9d1 BS |
147 | static void |
148 | drm_encoder_disable(struct drm_encoder *encoder) | |
149 | { | |
be26a66d | 150 | const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
86a1b9d1 | 151 | |
75229eca NT |
152 | if (!encoder_funcs) |
153 | return; | |
154 | ||
862e686c | 155 | drm_bridge_disable(encoder->bridge); |
3b336ec4 | 156 | |
86a1b9d1 BS |
157 | if (encoder_funcs->disable) |
158 | (*encoder_funcs->disable)(encoder); | |
75229eca | 159 | else if (encoder_funcs->dpms) |
86a1b9d1 | 160 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
3b336ec4 | 161 | |
862e686c | 162 | drm_bridge_post_disable(encoder->bridge); |
86a1b9d1 BS |
163 | } |
164 | ||
b182cc59 | 165 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
f453ba04 DA |
166 | { |
167 | struct drm_encoder *encoder; | |
f453ba04 DA |
168 | struct drm_crtc *crtc; |
169 | ||
62ff94a5 DV |
170 | drm_warn_on_modeset_not_all_locked(dev); |
171 | ||
6295d607 | 172 | drm_for_each_encoder(encoder, dev) { |
92971021 | 173 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 174 | drm_encoder_disable(encoder); |
b5e6c1da | 175 | /* disconnect encoder from any connector */ |
9c552dd7 | 176 | encoder->crtc = NULL; |
a3a0544b | 177 | } |
f453ba04 DA |
178 | } |
179 | ||
6295d607 | 180 | drm_for_each_crtc(crtc, dev) { |
be26a66d | 181 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
f453ba04 DA |
182 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
183 | if (!crtc->enabled) { | |
5c8d7171 AD |
184 | if (crtc_funcs->disable) |
185 | (*crtc_funcs->disable)(crtc); | |
186 | else | |
187 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f4510a27 | 188 | crtc->primary->fb = NULL; |
f453ba04 DA |
189 | } |
190 | } | |
191 | } | |
b182cc59 DV |
192 | |
193 | /** | |
194 | * drm_helper_disable_unused_functions - disable unused objects | |
195 | * @dev: DRM device | |
196 | * | |
197 | * This function walks through the entire mode setting configuration of @dev. It | |
2be94971 DV |
198 | * will remove any CRTC links of unused encoders and encoder links of |
199 | * disconnected connectors. Then it will disable all unused encoders and CRTCs | |
b182cc59 DV |
200 | * either by calling their disable callback if available or by calling their |
201 | * dpms callback with DRM_MODE_DPMS_OFF. | |
09859d2a DV |
202 | * |
203 | * NOTE: | |
204 | * | |
205 | * This function is part of the legacy modeset helper library and will cause | |
206 | * major confusion with atomic drivers. This is because atomic helpers guarantee | |
207 | * to never call ->disable() hooks on a disabled function, or ->enable() hooks | |
208 | * on an enabled functions. drm_helper_disable_unused_functions() on the other | |
209 | * hand throws such guarantees into the wind and calls disable hooks | |
210 | * unconditionally on unused functions. | |
b182cc59 DV |
211 | */ |
212 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
213 | { | |
6605ca0f DV |
214 | if (drm_core_check_feature(dev, DRIVER_ATOMIC)) |
215 | DRM_ERROR("Called for atomic driver, this is not what you want.\n"); | |
216 | ||
b182cc59 DV |
217 | drm_modeset_lock_all(dev); |
218 | __drm_helper_disable_unused_functions(dev); | |
219 | drm_modeset_unlock_all(dev); | |
220 | } | |
f453ba04 DA |
221 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
222 | ||
7bec756c JB |
223 | /* |
224 | * Check the CRTC we're going to map each output to vs. its current | |
225 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
226 | * since the driver will have to re-route things. | |
227 | */ | |
228 | static void | |
229 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
230 | { | |
be26a66d | 231 | const struct drm_encoder_helper_funcs *encoder_funcs; |
7bec756c JB |
232 | struct drm_encoder *encoder; |
233 | ||
6295d607 | 234 | drm_for_each_encoder(encoder, dev) { |
7bec756c | 235 | encoder_funcs = encoder->helper_private; |
75229eca NT |
236 | if (!encoder_funcs) |
237 | continue; | |
238 | ||
7bec756c JB |
239 | /* Disable unused encoders */ |
240 | if (encoder->crtc == NULL) | |
86a1b9d1 | 241 | drm_encoder_disable(encoder); |
7bec756c JB |
242 | /* Disable encoders whose CRTC is about to change */ |
243 | if (encoder_funcs->get_crtc && | |
244 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 245 | drm_encoder_disable(encoder); |
7bec756c JB |
246 | } |
247 | } | |
248 | ||
f453ba04 | 249 | /** |
0d4ed4c8 | 250 | * drm_crtc_helper_set_mode - internal helper to set a mode |
f453ba04 DA |
251 | * @crtc: CRTC to program |
252 | * @mode: mode to use | |
4c9287c6 AD |
253 | * @x: horizontal offset into the surface |
254 | * @y: vertical offset into the surface | |
0d4ed4c8 | 255 | * @old_fb: old framebuffer, for cleanup |
f453ba04 | 256 | * |
f453ba04 | 257 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
0d4ed4c8 DV |
258 | * to fixup or reject the mode prior to trying to set it. This is an internal |
259 | * helper that drivers could e.g. use to update properties that require the | |
260 | * entire output pipe to be disabled and re-enabled in a new configuration. For | |
261 | * example for changing whether audio is enabled on a hdmi link or for changing | |
262 | * panel fitter or dither attributes. It is also called by the | |
263 | * drm_crtc_helper_set_config() helper function to drive the mode setting | |
264 | * sequence. | |
f453ba04 | 265 | * |
3fcc42e0 DV |
266 | * Returns: |
267 | * True if the mode was set successfully, false otherwise. | |
f453ba04 DA |
268 | */ |
269 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
270 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
271 | int x, int y, |
272 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
273 | { |
274 | struct drm_device *dev = crtc->dev; | |
5a27528a | 275 | struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
be26a66d JN |
276 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
277 | const struct drm_encoder_helper_funcs *encoder_funcs; | |
f453ba04 | 278 | int saved_x, saved_y; |
7e99acdc | 279 | bool saved_enabled; |
f453ba04 DA |
280 | struct drm_encoder *encoder; |
281 | bool ret = true; | |
282 | ||
62ff94a5 DV |
283 | drm_warn_on_modeset_not_all_locked(dev); |
284 | ||
7e99acdc | 285 | saved_enabled = crtc->enabled; |
f453ba04 | 286 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
f453ba04 DA |
287 | if (!crtc->enabled) |
288 | return true; | |
289 | ||
021a8455 | 290 | adjusted_mode = drm_mode_duplicate(dev, mode); |
7e99acdc IH |
291 | if (!adjusted_mode) { |
292 | crtc->enabled = saved_enabled; | |
6bfc56aa | 293 | return false; |
7e99acdc | 294 | } |
021a8455 | 295 | |
f453ba04 | 296 | saved_mode = crtc->mode; |
5a27528a | 297 | saved_hwmode = crtc->hwmode; |
f453ba04 DA |
298 | saved_x = crtc->x; |
299 | saved_y = crtc->y; | |
300 | ||
301 | /* Update crtc values up front so the driver can rely on them for mode | |
302 | * setting. | |
303 | */ | |
304 | crtc->mode = *mode; | |
305 | crtc->x = x; | |
306 | crtc->y = y; | |
307 | ||
f453ba04 DA |
308 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
309 | * adjust it according to limitations or connector properties, and also | |
310 | * a chance to reject the mode entirely. | |
311 | */ | |
6295d607 | 312 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
313 | |
314 | if (encoder->crtc != crtc) | |
315 | continue; | |
3b336ec4 | 316 | |
75229eca NT |
317 | encoder_funcs = encoder->helper_private; |
318 | if (!encoder_funcs) | |
319 | continue; | |
320 | ||
862e686c AT |
321 | ret = drm_bridge_mode_fixup(encoder->bridge, |
322 | mode, adjusted_mode); | |
323 | if (!ret) { | |
324 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
325 | goto done; | |
3b336ec4 SP |
326 | } |
327 | ||
f453ba04 | 328 | encoder_funcs = encoder->helper_private; |
3c5b2673 CP |
329 | if (encoder_funcs->mode_fixup) { |
330 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
331 | adjusted_mode))) { | |
332 | DRM_DEBUG_KMS("Encoder fixup failed\n"); | |
333 | goto done; | |
334 | } | |
f453ba04 DA |
335 | } |
336 | } | |
337 | ||
49f718c5 CP |
338 | if (crtc_funcs->mode_fixup) { |
339 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, | |
340 | adjusted_mode))) { | |
341 | DRM_DEBUG_KMS("CRTC fixup failed\n"); | |
342 | goto done; | |
343 | } | |
f453ba04 | 344 | } |
fa3ab4c2 | 345 | DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); |
f453ba04 | 346 | |
5a27528a DS |
347 | crtc->hwmode = *adjusted_mode; |
348 | ||
f453ba04 | 349 | /* Prepare the encoders and CRTCs before setting the mode. */ |
6295d607 | 350 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
351 | |
352 | if (encoder->crtc != crtc) | |
353 | continue; | |
3b336ec4 | 354 | |
75229eca NT |
355 | encoder_funcs = encoder->helper_private; |
356 | if (!encoder_funcs) | |
357 | continue; | |
358 | ||
862e686c | 359 | drm_bridge_disable(encoder->bridge); |
3b336ec4 | 360 | |
f453ba04 | 361 | /* Disable the encoders as the first thing we do. */ |
75229eca NT |
362 | if (encoder_funcs->prepare) |
363 | encoder_funcs->prepare(encoder); | |
3b336ec4 | 364 | |
862e686c | 365 | drm_bridge_post_disable(encoder->bridge); |
f453ba04 DA |
366 | } |
367 | ||
7bec756c JB |
368 | drm_crtc_prepare_encoders(dev); |
369 | ||
f453ba04 DA |
370 | crtc_funcs->prepare(crtc); |
371 | ||
372 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
373 | * on the DPLL. | |
374 | */ | |
5c3b82e2 CW |
375 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
376 | if (!ret) | |
377 | goto done; | |
f453ba04 | 378 | |
6295d607 | 379 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
380 | |
381 | if (encoder->crtc != crtc) | |
382 | continue; | |
383 | ||
75229eca NT |
384 | encoder_funcs = encoder->helper_private; |
385 | if (!encoder_funcs) | |
386 | continue; | |
387 | ||
9440106b | 388 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
83a8cfd3 | 389 | encoder->base.id, encoder->name, |
9440106b | 390 | mode->base.id, mode->name); |
75229eca NT |
391 | if (encoder_funcs->mode_set) |
392 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
3b336ec4 | 393 | |
862e686c | 394 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
f453ba04 DA |
395 | } |
396 | ||
397 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
398 | crtc_funcs->commit(crtc); | |
399 | ||
6295d607 | 400 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
401 | |
402 | if (encoder->crtc != crtc) | |
403 | continue; | |
404 | ||
75229eca NT |
405 | encoder_funcs = encoder->helper_private; |
406 | if (!encoder_funcs) | |
407 | continue; | |
408 | ||
862e686c | 409 | drm_bridge_pre_enable(encoder->bridge); |
3b336ec4 | 410 | |
75229eca NT |
411 | if (encoder_funcs->commit) |
412 | encoder_funcs->commit(encoder); | |
f453ba04 | 413 | |
862e686c | 414 | drm_bridge_enable(encoder->bridge); |
f453ba04 DA |
415 | } |
416 | ||
27641c3f MK |
417 | /* Calculate and store various constants which |
418 | * are later needed by vblank and swap-completion | |
419 | * timestamping. They are derived from true hwmode. | |
420 | */ | |
545cdd55 | 421 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
27641c3f | 422 | |
f453ba04 DA |
423 | /* FIXME: add subpixel order */ |
424 | done: | |
021a8455 | 425 | drm_mode_destroy(dev, adjusted_mode); |
f453ba04 | 426 | if (!ret) { |
7e99acdc | 427 | crtc->enabled = saved_enabled; |
f453ba04 | 428 | crtc->mode = saved_mode; |
5a27528a | 429 | crtc->hwmode = saved_hwmode; |
f453ba04 DA |
430 | crtc->x = saved_x; |
431 | crtc->y = saved_y; | |
432 | } | |
433 | ||
434 | return ret; | |
435 | } | |
436 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
437 | ||
a74591d7 | 438 | static void |
6eebd6bb CW |
439 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
440 | { | |
441 | struct drm_device *dev = crtc->dev; | |
442 | struct drm_connector *connector; | |
443 | struct drm_encoder *encoder; | |
444 | ||
445 | /* Decouple all encoders and their attached connectors from this crtc */ | |
6295d607 | 446 | drm_for_each_encoder(encoder, dev) { |
c36a3254 DV |
447 | struct drm_connector_list_iter conn_iter; |
448 | ||
6eebd6bb CW |
449 | if (encoder->crtc != crtc) |
450 | continue; | |
451 | ||
b982dab1 | 452 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 453 | drm_for_each_connector_iter(connector, &conn_iter) { |
6eebd6bb CW |
454 | if (connector->encoder != encoder) |
455 | continue; | |
456 | ||
457 | connector->encoder = NULL; | |
a6ad6230 TR |
458 | |
459 | /* | |
460 | * drm_helper_disable_unused_functions() ought to be | |
461 | * doing this, but since we've decoupled the encoder | |
462 | * from the connector above, the required connection | |
463 | * between them is henceforth no longer available. | |
464 | */ | |
465 | connector->dpms = DRM_MODE_DPMS_OFF; | |
0955c125 DA |
466 | |
467 | /* we keep a reference while the encoder is bound */ | |
ad093607 | 468 | drm_connector_put(connector); |
6eebd6bb | 469 | } |
b982dab1 | 470 | drm_connector_list_iter_end(&conn_iter); |
6eebd6bb CW |
471 | } |
472 | ||
b182cc59 | 473 | __drm_helper_disable_unused_functions(dev); |
6eebd6bb CW |
474 | } |
475 | ||
f453ba04 DA |
476 | /** |
477 | * drm_crtc_helper_set_config - set a new config from userspace | |
0d4ed4c8 | 478 | * @set: mode set configuration |
f453ba04 | 479 | * |
6806cdf9 DV |
480 | * The drm_crtc_helper_set_config() helper function implements the of |
481 | * &drm_crtc_funcs.set_config callback for drivers using the legacy CRTC | |
482 | * helpers. | |
2be94971 DV |
483 | * |
484 | * It first tries to locate the best encoder for each connector by calling the | |
6806cdf9 | 485 | * connector @drm_connector_helper_funcs.best_encoder helper operation. |
2be94971 DV |
486 | * |
487 | * After locating the appropriate encoders, the helper function will call the | |
488 | * mode_fixup encoder and CRTC helper operations to adjust the requested mode, | |
489 | * or reject it completely in which case an error will be returned to the | |
490 | * application. If the new configuration after mode adjustment is identical to | |
491 | * the current configuration the helper function will return without performing | |
492 | * any other operation. | |
493 | * | |
494 | * If the adjusted mode is identical to the current mode but changes to the | |
495 | * frame buffer need to be applied, the drm_crtc_helper_set_config() function | |
6806cdf9 | 496 | * will call the CRTC &drm_crtc_helper_funcs.mode_set_base helper operation. |
2be94971 DV |
497 | * |
498 | * If the adjusted mode differs from the current mode, or if the | |
499 | * ->mode_set_base() helper operation is not provided, the helper function | |
500 | * performs a full mode set sequence by calling the ->prepare(), ->mode_set() | |
501 | * and ->commit() CRTC and encoder helper operations, in that order. | |
502 | * Alternatively it can also use the dpms and disable helper operations. For | |
ea0dd85a | 503 | * details see &struct drm_crtc_helper_funcs and struct |
2be94971 DV |
504 | * &drm_encoder_helper_funcs. |
505 | * | |
506 | * This function is deprecated. New drivers must implement atomic modeset | |
507 | * support, for which this function is unsuitable. Instead drivers should use | |
508 | * drm_atomic_helper_set_config(). | |
f453ba04 | 509 | * |
3fcc42e0 DV |
510 | * Returns: |
511 | * Returns 0 on success, negative errno numbers on failure. | |
f453ba04 DA |
512 | */ |
513 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
514 | { | |
515 | struct drm_device *dev; | |
93f55972 PZ |
516 | struct drm_crtc **save_encoder_crtcs, *new_crtc; |
517 | struct drm_encoder **save_connector_encoders, *new_encoder, *encoder; | |
4cb72b17 JB |
518 | bool mode_changed = false; /* if true do a full mode set */ |
519 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
93f55972 | 520 | struct drm_connector *connector; |
c36a3254 | 521 | struct drm_connector_list_iter conn_iter; |
f453ba04 | 522 | int count = 0, ro, fail = 0; |
be26a66d | 523 | const struct drm_crtc_helper_funcs *crtc_funcs; |
c5006cfe | 524 | struct drm_mode_set save_set; |
4a1b0714 | 525 | int ret; |
bf9dc102 | 526 | int i; |
f453ba04 | 527 | |
58367ed6 | 528 | DRM_DEBUG_KMS("\n"); |
f453ba04 | 529 | |
e58de880 DV |
530 | BUG_ON(!set); |
531 | BUG_ON(!set->crtc); | |
532 | BUG_ON(!set->crtc->helper_private); | |
f453ba04 | 533 | |
e58de880 DV |
534 | /* Enforce sane interface api - has been abused by the fb helper. */ |
535 | BUG_ON(!set->mode && set->fb); | |
536 | BUG_ON(set->fb && set->num_connectors == 0); | |
f453ba04 DA |
537 | |
538 | crtc_funcs = set->crtc->helper_private; | |
539 | ||
ede3ff52 CW |
540 | if (!set->mode) |
541 | set->fb = NULL; | |
542 | ||
9440106b | 543 | if (set->fb) { |
fa3ab4c2 VS |
544 | DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
545 | set->crtc->base.id, set->crtc->name, | |
546 | set->fb->base.id, | |
547 | (int)set->num_connectors, set->x, set->y); | |
9440106b | 548 | } else { |
fa3ab4c2 VS |
549 | DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n", |
550 | set->crtc->base.id, set->crtc->name); | |
a74591d7 TR |
551 | drm_crtc_helper_disable(set->crtc); |
552 | return 0; | |
9440106b | 553 | } |
f453ba04 DA |
554 | |
555 | dev = set->crtc->dev; | |
556 | ||
62ff94a5 DV |
557 | drm_warn_on_modeset_not_all_locked(dev); |
558 | ||
02ee4e94 IH |
559 | /* |
560 | * Allocate space for the backup of all (non-pointer) encoder and | |
561 | * connector data. | |
562 | */ | |
93f55972 PZ |
563 | save_encoder_crtcs = kzalloc(dev->mode_config.num_encoder * |
564 | sizeof(struct drm_crtc *), GFP_KERNEL); | |
565 | if (!save_encoder_crtcs) | |
f453ba04 | 566 | return -ENOMEM; |
f453ba04 | 567 | |
93f55972 PZ |
568 | save_connector_encoders = kzalloc(dev->mode_config.num_connector * |
569 | sizeof(struct drm_encoder *), GFP_KERNEL); | |
570 | if (!save_connector_encoders) { | |
571 | kfree(save_encoder_crtcs); | |
e67aae79 MM |
572 | return -ENOMEM; |
573 | } | |
574 | ||
02ee4e94 IH |
575 | /* |
576 | * Copy data. Note that driver private data is not affected. | |
e67aae79 MM |
577 | * Should anything bad happen only the expected state is |
578 | * restored, not the drivers personal bookkeeping. | |
579 | */ | |
e67aae79 | 580 | count = 0; |
6295d607 | 581 | drm_for_each_encoder(encoder, dev) { |
93f55972 | 582 | save_encoder_crtcs[count++] = encoder->crtc; |
e67aae79 MM |
583 | } |
584 | ||
585 | count = 0; | |
b982dab1 | 586 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 587 | drm_for_each_connector_iter(connector, &conn_iter) |
93f55972 | 588 | save_connector_encoders[count++] = connector->encoder; |
b982dab1 | 589 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 590 | |
c5006cfe JB |
591 | save_set.crtc = set->crtc; |
592 | save_set.mode = &set->crtc->mode; | |
593 | save_set.x = set->crtc->x; | |
594 | save_set.y = set->crtc->y; | |
f4510a27 | 595 | save_set.fb = set->crtc->primary->fb; |
c5006cfe | 596 | |
f453ba04 DA |
597 | /* We should be able to check here if the fb has the same properties |
598 | * and then just flip_or_move it */ | |
f4510a27 | 599 | if (set->crtc->primary->fb != set->fb) { |
712531bf | 600 | /* If we have no fb then treat it as a full mode set */ |
f4510a27 | 601 | if (set->crtc->primary->fb == NULL) { |
58367ed6 | 602 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 603 | mode_changed = true; |
dbd4d576 | 604 | } else if (set->fb->format != set->crtc->primary->fb->format) { |
ce83adf7 | 605 | mode_changed = true; |
8dff4742 | 606 | } else |
712531bf | 607 | fb_changed = true; |
f453ba04 DA |
608 | } |
609 | ||
610 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 611 | fb_changed = true; |
f453ba04 | 612 | |
2deafc7e | 613 | if (!drm_mode_equal(set->mode, &set->crtc->mode)) { |
58367ed6 | 614 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
615 | drm_mode_debug_printmodeline(&set->crtc->mode); |
616 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 617 | mode_changed = true; |
f453ba04 DA |
618 | } |
619 | ||
fffc5f59 PZ |
620 | /* take a reference on all unbound connectors in set, reuse the |
621 | * already taken reference for bound connectors | |
622 | */ | |
0955c125 | 623 | for (ro = 0; ro < set->num_connectors; ro++) { |
fffc5f59 PZ |
624 | if (set->connectors[ro]->encoder) |
625 | continue; | |
ad093607 | 626 | drm_connector_get(set->connectors[ro]); |
0955c125 DA |
627 | } |
628 | ||
f453ba04 DA |
629 | /* a) traverse passed in connector list and get encoders for them */ |
630 | count = 0; | |
b982dab1 | 631 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 632 | drm_for_each_connector_iter(connector, &conn_iter) { |
be26a66d | 633 | const struct drm_connector_helper_funcs *connector_funcs = |
f453ba04 | 634 | connector->helper_private; |
f453ba04 DA |
635 | new_encoder = connector->encoder; |
636 | for (ro = 0; ro < set->num_connectors; ro++) { | |
637 | if (set->connectors[ro] == connector) { | |
638 | new_encoder = connector_funcs->best_encoder(connector); | |
639 | /* if we can't get an encoder for a connector | |
640 | we are setting now - then fail */ | |
641 | if (new_encoder == NULL) | |
642 | /* don't break so fail path works correct */ | |
643 | fail = 1; | |
25f397a4 DV |
644 | |
645 | if (connector->dpms != DRM_MODE_DPMS_ON) { | |
646 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); | |
647 | mode_changed = true; | |
648 | } | |
177cf92d DV |
649 | |
650 | break; | |
f453ba04 DA |
651 | } |
652 | } | |
653 | ||
654 | if (new_encoder != connector->encoder) { | |
58367ed6 | 655 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 656 | mode_changed = true; |
ff846ab7 MM |
657 | /* If the encoder is reused for another connector, then |
658 | * the appropriate crtc will be set later. | |
659 | */ | |
ff6fdbed MM |
660 | if (connector->encoder) |
661 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
662 | connector->encoder = new_encoder; |
663 | } | |
664 | } | |
b982dab1 | 665 | drm_connector_list_iter_end(&conn_iter); |
f453ba04 DA |
666 | |
667 | if (fail) { | |
668 | ret = -EINVAL; | |
e67aae79 | 669 | goto fail; |
f453ba04 DA |
670 | } |
671 | ||
672 | count = 0; | |
b982dab1 | 673 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 674 | drm_for_each_connector_iter(connector, &conn_iter) { |
f453ba04 DA |
675 | if (!connector->encoder) |
676 | continue; | |
677 | ||
f453ba04 DA |
678 | if (connector->encoder->crtc == set->crtc) |
679 | new_crtc = NULL; | |
680 | else | |
681 | new_crtc = connector->encoder->crtc; | |
682 | ||
683 | for (ro = 0; ro < set->num_connectors; ro++) { | |
684 | if (set->connectors[ro] == connector) | |
685 | new_crtc = set->crtc; | |
686 | } | |
7bec756c JB |
687 | |
688 | /* Make sure the new CRTC will work with the encoder */ | |
689 | if (new_crtc && | |
690 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
691 | ret = -EINVAL; | |
b982dab1 | 692 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 693 | goto fail; |
7bec756c | 694 | } |
f453ba04 | 695 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 696 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 697 | mode_changed = true; |
f453ba04 DA |
698 | connector->encoder->crtc = new_crtc; |
699 | } | |
9440106b | 700 | if (new_crtc) { |
fa3ab4c2 VS |
701 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n", |
702 | connector->base.id, connector->name, | |
703 | new_crtc->base.id, new_crtc->name); | |
9440106b JG |
704 | } else { |
705 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
fa3ab4c2 | 706 | connector->base.id, connector->name); |
9440106b | 707 | } |
f453ba04 | 708 | } |
b982dab1 | 709 | drm_connector_list_iter_end(&conn_iter); |
f453ba04 DA |
710 | |
711 | /* mode_set_base is not a required function */ | |
712531bf JB |
712 | if (fb_changed && !crtc_funcs->mode_set_base) |
713 | mode_changed = true; | |
f453ba04 | 714 | |
712531bf | 715 | if (mode_changed) { |
48b1f5dd | 716 | if (drm_helper_crtc_in_use(set->crtc)) { |
58367ed6 ZY |
717 | DRM_DEBUG_KMS("attempting to set mode from" |
718 | " userspace\n"); | |
f453ba04 | 719 | drm_mode_debug_printmodeline(set->mode); |
f4510a27 | 720 | set->crtc->primary->fb = set->fb; |
f453ba04 | 721 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
3c4fdcfb | 722 | set->x, set->y, |
bec2eac3 | 723 | save_set.fb)) { |
fa3ab4c2 VS |
724 | DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n", |
725 | set->crtc->base.id, set->crtc->name); | |
f4510a27 | 726 | set->crtc->primary->fb = save_set.fb; |
f453ba04 | 727 | ret = -EINVAL; |
e67aae79 | 728 | goto fail; |
f453ba04 | 729 | } |
25f397a4 DV |
730 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
731 | for (i = 0; i < set->num_connectors; i++) { | |
732 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, | |
25933820 | 733 | set->connectors[i]->name); |
25f397a4 DV |
734 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
735 | } | |
f453ba04 | 736 | } |
b182cc59 | 737 | __drm_helper_disable_unused_functions(dev); |
712531bf | 738 | } else if (fb_changed) { |
9b1596af BS |
739 | set->crtc->x = set->x; |
740 | set->crtc->y = set->y; | |
f4510a27 | 741 | set->crtc->primary->fb = set->fb; |
5c3b82e2 | 742 | ret = crtc_funcs->mode_set_base(set->crtc, |
bec2eac3 | 743 | set->x, set->y, save_set.fb); |
0ba41e44 | 744 | if (ret != 0) { |
fbce4064 IH |
745 | set->crtc->x = save_set.x; |
746 | set->crtc->y = save_set.y; | |
f4510a27 | 747 | set->crtc->primary->fb = save_set.fb; |
e67aae79 | 748 | goto fail; |
0ba41e44 | 749 | } |
f453ba04 DA |
750 | } |
751 | ||
93f55972 PZ |
752 | kfree(save_connector_encoders); |
753 | kfree(save_encoder_crtcs); | |
f453ba04 DA |
754 | return 0; |
755 | ||
e67aae79 MM |
756 | fail: |
757 | /* Restore all previous data. */ | |
e67aae79 | 758 | count = 0; |
6295d607 | 759 | drm_for_each_encoder(encoder, dev) { |
93f55972 | 760 | encoder->crtc = save_encoder_crtcs[count++]; |
e62fb64e | 761 | } |
e67aae79 | 762 | |
f453ba04 | 763 | count = 0; |
b982dab1 | 764 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 765 | drm_for_each_connector_iter(connector, &conn_iter) |
93f55972 | 766 | connector->encoder = save_connector_encoders[count++]; |
b982dab1 | 767 | drm_connector_list_iter_end(&conn_iter); |
e67aae79 | 768 | |
fffc5f59 PZ |
769 | /* after fail drop reference on all unbound connectors in set, let |
770 | * bound connectors keep their reference | |
771 | */ | |
0955c125 | 772 | for (ro = 0; ro < set->num_connectors; ro++) { |
fffc5f59 PZ |
773 | if (set->connectors[ro]->encoder) |
774 | continue; | |
ad093607 | 775 | drm_connector_put(set->connectors[ro]); |
0955c125 DA |
776 | } |
777 | ||
c5006cfe JB |
778 | /* Try to restore the config */ |
779 | if (mode_changed && | |
780 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, | |
781 | save_set.y, save_set.fb)) | |
782 | DRM_ERROR("failed to restore config after modeset failure\n"); | |
783 | ||
93f55972 PZ |
784 | kfree(save_connector_encoders); |
785 | kfree(save_encoder_crtcs); | |
f453ba04 DA |
786 | return ret; |
787 | } | |
788 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
789 | ||
c9fb15f6 KP |
790 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
791 | { | |
792 | int dpms = DRM_MODE_DPMS_OFF; | |
793 | struct drm_connector *connector; | |
c36a3254 | 794 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 KP |
795 | struct drm_device *dev = encoder->dev; |
796 | ||
b982dab1 | 797 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 798 | drm_for_each_connector_iter(connector, &conn_iter) |
c9fb15f6 KP |
799 | if (connector->encoder == encoder) |
800 | if (connector->dpms < dpms) | |
801 | dpms = connector->dpms; | |
b982dab1 | 802 | drm_connector_list_iter_end(&conn_iter); |
c36a3254 | 803 | |
c9fb15f6 KP |
804 | return dpms; |
805 | } | |
806 | ||
3b336ec4 SP |
807 | /* Helper which handles bridge ordering around encoder dpms */ |
808 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) | |
809 | { | |
810 | struct drm_bridge *bridge = encoder->bridge; | |
be26a66d | 811 | const struct drm_encoder_helper_funcs *encoder_funcs; |
3b336ec4 | 812 | |
75229eca NT |
813 | encoder_funcs = encoder->helper_private; |
814 | if (!encoder_funcs) | |
815 | return; | |
816 | ||
862e686c AT |
817 | if (mode == DRM_MODE_DPMS_ON) |
818 | drm_bridge_pre_enable(bridge); | |
819 | else | |
820 | drm_bridge_disable(bridge); | |
3b336ec4 | 821 | |
3b336ec4 SP |
822 | if (encoder_funcs->dpms) |
823 | encoder_funcs->dpms(encoder, mode); | |
824 | ||
862e686c AT |
825 | if (mode == DRM_MODE_DPMS_ON) |
826 | drm_bridge_enable(bridge); | |
827 | else | |
828 | drm_bridge_post_disable(bridge); | |
3b336ec4 SP |
829 | } |
830 | ||
c9fb15f6 KP |
831 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
832 | { | |
833 | int dpms = DRM_MODE_DPMS_OFF; | |
834 | struct drm_connector *connector; | |
c36a3254 | 835 | struct drm_connector_list_iter conn_iter; |
c9fb15f6 KP |
836 | struct drm_device *dev = crtc->dev; |
837 | ||
b982dab1 | 838 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 839 | drm_for_each_connector_iter(connector, &conn_iter) |
c9fb15f6 KP |
840 | if (connector->encoder && connector->encoder->crtc == crtc) |
841 | if (connector->dpms < dpms) | |
842 | dpms = connector->dpms; | |
b982dab1 | 843 | drm_connector_list_iter_end(&conn_iter); |
c36a3254 | 844 | |
c9fb15f6 KP |
845 | return dpms; |
846 | } | |
847 | ||
848 | /** | |
0d4ed4c8 DV |
849 | * drm_helper_connector_dpms() - connector dpms helper implementation |
850 | * @connector: affected connector | |
851 | * @mode: DPMS mode | |
c9fb15f6 | 852 | * |
6806cdf9 DV |
853 | * The drm_helper_connector_dpms() helper function implements the |
854 | * &drm_connector_funcs.dpms callback for drivers using the legacy CRTC | |
855 | * helpers. | |
2be94971 DV |
856 | * |
857 | * This is the main helper function provided by the CRTC helper framework for | |
0d4ed4c8 | 858 | * implementing the DPMS connector attribute. It computes the new desired DPMS |
6806cdf9 DV |
859 | * state for all encoders and CRTCs in the output mesh and calls the |
860 | * &drm_crtc_helper_funcs.dpms and &drm_encoder_helper_funcs.dpms callbacks | |
861 | * provided by the driver. | |
2be94971 DV |
862 | * |
863 | * This function is deprecated. New drivers must implement atomic modeset | |
864 | * support, for which this function is unsuitable. Instead drivers should use | |
865 | * drm_atomic_helper_connector_dpms(). | |
9a69a9ac ML |
866 | * |
867 | * Returns: | |
868 | * Always returns 0. | |
c9fb15f6 | 869 | */ |
9a69a9ac | 870 | int drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
c9fb15f6 KP |
871 | { |
872 | struct drm_encoder *encoder = connector->encoder; | |
873 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
3b336ec4 | 874 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
c9fb15f6 KP |
875 | |
876 | if (mode == connector->dpms) | |
9a69a9ac | 877 | return 0; |
c9fb15f6 KP |
878 | |
879 | old_dpms = connector->dpms; | |
880 | connector->dpms = mode; | |
881 | ||
3b336ec4 SP |
882 | if (encoder) |
883 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); | |
884 | ||
c9fb15f6 KP |
885 | /* from off to on, do crtc then encoder */ |
886 | if (mode < old_dpms) { | |
887 | if (crtc) { | |
be26a66d | 888 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
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; |
c9fb15f6 KP |
903 | if (crtc_funcs->dpms) |
904 | (*crtc_funcs->dpms) (crtc, | |
905 | drm_helper_choose_crtc_dpms(crtc)); | |
906 | } | |
907 | } | |
908 | ||
9a69a9ac | 909 | return 0; |
c9fb15f6 KP |
910 | } |
911 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
912 | ||
aa4cd910 DV |
913 | /** |
914 | * drm_helper_resume_force_mode - force-restore mode setting configuration | |
915 | * @dev: drm_device which should be restored | |
916 | * | |
917 | * Drivers which use the mode setting helpers can use this function to | |
918 | * force-restore the mode setting configuration e.g. on resume or when something | |
919 | * else might have trampled over the hw state (like some overzealous old BIOSen | |
920 | * tended to do). | |
00d762cb DV |
921 | * |
922 | * This helper doesn't provide a error return value since restoring the old | |
923 | * config should never fail due to resource allocation issues since the driver | |
924 | * has successfully set the restored configuration already. Hence this should | |
925 | * boil down to the equivalent of a few dpms on calls, which also don't provide | |
926 | * an error code. | |
927 | * | |
928 | * Drivers where simply restoring an old configuration again might fail (e.g. | |
929 | * due to slight differences in allocating shared resources when the | |
930 | * configuration is restored in a different order than when userspace set it up) | |
931 | * need to use their own restore logic. | |
14942760 TR |
932 | * |
933 | * This function is deprecated. New drivers should implement atomic mode- | |
934 | * setting and use the atomic suspend/resume helpers. | |
935 | * | |
936 | * See also: | |
937 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
aa4cd910 | 938 | */ |
00d762cb | 939 | void drm_helper_resume_force_mode(struct drm_device *dev) |
f453ba04 DA |
940 | { |
941 | struct drm_crtc *crtc; | |
89347bb8 | 942 | struct drm_encoder *encoder; |
be26a66d | 943 | const struct drm_crtc_helper_funcs *crtc_funcs; |
00d762cb DV |
944 | int encoder_dpms; |
945 | bool ret; | |
f453ba04 | 946 | |
3ea87855 | 947 | drm_modeset_lock_all(dev); |
6295d607 | 948 | drm_for_each_crtc(crtc, dev) { |
f453ba04 DA |
949 | |
950 | if (!crtc->enabled) | |
951 | continue; | |
952 | ||
3c4fdcfb | 953 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
f4510a27 | 954 | crtc->x, crtc->y, crtc->primary->fb); |
f453ba04 | 955 | |
00d762cb | 956 | /* Restoring the old config should never fail! */ |
f453ba04 DA |
957 | if (ret == false) |
958 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
959 | |
960 | /* Turn off outputs that were already powered off */ | |
961 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
6295d607 | 962 | drm_for_each_encoder(encoder, dev) { |
89347bb8 DJ |
963 | |
964 | if(encoder->crtc != crtc) | |
965 | continue; | |
966 | ||
3b336ec4 SP |
967 | encoder_dpms = drm_helper_choose_encoder_dpms( |
968 | encoder); | |
969 | ||
970 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
89347bb8 | 971 | } |
817e631e CW |
972 | |
973 | crtc_funcs = crtc->helper_private; | |
974 | if (crtc_funcs->dpms) | |
975 | (*crtc_funcs->dpms) (crtc, | |
976 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 977 | } |
f453ba04 | 978 | } |
00d762cb | 979 | |
af4fcb57 | 980 | /* disable the unused connectors while restoring the modesetting */ |
b182cc59 | 981 | __drm_helper_disable_unused_functions(dev); |
3ea87855 | 982 | drm_modeset_unlock_all(dev); |
f453ba04 DA |
983 | } |
984 | EXPORT_SYMBOL(drm_helper_resume_force_mode); | |
2f324b42 DV |
985 | |
986 | /** | |
987 | * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers | |
988 | * @crtc: DRM CRTC | |
989 | * @mode: DRM display mode which userspace requested | |
990 | * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks | |
991 | * @x: x offset of the CRTC scanout area on the underlying framebuffer | |
992 | * @y: y offset of the CRTC scanout area on the underlying framebuffer | |
993 | * @old_fb: previous framebuffer | |
994 | * | |
995 | * This function implements a callback useable as the ->mode_set callback | |
2be94971 | 996 | * required by the CRTC helpers. Besides the atomic plane helper functions for |
2f324b42 | 997 | * the primary plane the driver must also provide the ->mode_set_nofb callback |
2be94971 | 998 | * to set up the CRTC. |
2f324b42 DV |
999 | * |
1000 | * This is a transitional helper useful for converting drivers to the atomic | |
1001 | * interfaces. | |
1002 | */ | |
1003 | int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
1004 | struct drm_display_mode *adjusted_mode, int x, int y, | |
1005 | struct drm_framebuffer *old_fb) | |
1006 | { | |
1007 | struct drm_crtc_state *crtc_state; | |
be26a66d | 1008 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
2f324b42 DV |
1009 | int ret; |
1010 | ||
1011 | if (crtc->funcs->atomic_duplicate_state) | |
1012 | crtc_state = crtc->funcs->atomic_duplicate_state(crtc); | |
e4f31ad2 DV |
1013 | else { |
1014 | if (!crtc->state) | |
1015 | drm_atomic_helper_crtc_reset(crtc); | |
1016 | ||
ce14ec20 | 1017 | crtc_state = drm_atomic_helper_crtc_duplicate_state(crtc); |
e4f31ad2 | 1018 | } |
ce14ec20 DV |
1019 | |
1020 | if (!crtc_state) | |
1021 | return -ENOMEM; | |
2f324b42 | 1022 | |
2f324b42 | 1023 | crtc_state->planes_changed = true; |
623369e5 | 1024 | crtc_state->mode_changed = true; |
819364da DS |
1025 | ret = drm_atomic_set_mode_for_crtc(crtc_state, mode); |
1026 | if (ret) | |
1027 | goto out; | |
2f324b42 DV |
1028 | drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode); |
1029 | ||
1030 | if (crtc_funcs->atomic_check) { | |
1031 | ret = crtc_funcs->atomic_check(crtc, crtc_state); | |
9f658b7b DS |
1032 | if (ret) |
1033 | goto out; | |
2f324b42 DV |
1034 | } |
1035 | ||
1036 | swap(crtc->state, crtc_state); | |
1037 | ||
1038 | crtc_funcs->mode_set_nofb(crtc); | |
1039 | ||
9f658b7b DS |
1040 | ret = drm_helper_crtc_mode_set_base(crtc, x, y, old_fb); |
1041 | ||
1042 | out: | |
ce14ec20 DV |
1043 | if (crtc_state) { |
1044 | if (crtc->funcs->atomic_destroy_state) | |
1045 | crtc->funcs->atomic_destroy_state(crtc, crtc_state); | |
1046 | else | |
1047 | drm_atomic_helper_crtc_destroy_state(crtc, crtc_state); | |
2f324b42 DV |
1048 | } |
1049 | ||
9f658b7b | 1050 | return ret; |
2f324b42 DV |
1051 | } |
1052 | EXPORT_SYMBOL(drm_helper_crtc_mode_set); | |
1053 | ||
1054 | /** | |
1055 | * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers | |
1056 | * @crtc: DRM CRTC | |
1057 | * @x: x offset of the CRTC scanout area on the underlying framebuffer | |
1058 | * @y: y offset of the CRTC scanout area on the underlying framebuffer | |
1059 | * @old_fb: previous framebuffer | |
1060 | * | |
1061 | * This function implements a callback useable as the ->mode_set_base used | |
2be94971 | 1062 | * required by the CRTC helpers. The driver must provide the atomic plane helper |
2f324b42 DV |
1063 | * functions for the primary plane. |
1064 | * | |
1065 | * This is a transitional helper useful for converting drivers to the atomic | |
1066 | * interfaces. | |
1067 | */ | |
1068 | int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, | |
1069 | struct drm_framebuffer *old_fb) | |
1070 | { | |
1071 | struct drm_plane_state *plane_state; | |
1072 | struct drm_plane *plane = crtc->primary; | |
1073 | ||
1074 | if (plane->funcs->atomic_duplicate_state) | |
1075 | plane_state = plane->funcs->atomic_duplicate_state(plane); | |
6c148380 LY |
1076 | else { |
1077 | if (!plane->state) | |
1078 | drm_atomic_helper_plane_reset(plane); | |
1079 | ||
321ebf04 | 1080 | plane_state = drm_atomic_helper_plane_duplicate_state(plane); |
6c148380 | 1081 | } |
2f324b42 DV |
1082 | if (!plane_state) |
1083 | return -ENOMEM; | |
07cc0ef6 | 1084 | plane_state->plane = plane; |
2f324b42 DV |
1085 | |
1086 | plane_state->crtc = crtc; | |
321ebf04 | 1087 | drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb); |
2f324b42 DV |
1088 | plane_state->crtc_x = 0; |
1089 | plane_state->crtc_y = 0; | |
1090 | plane_state->crtc_h = crtc->mode.vdisplay; | |
1091 | plane_state->crtc_w = crtc->mode.hdisplay; | |
1092 | plane_state->src_x = x << 16; | |
1093 | plane_state->src_y = y << 16; | |
1094 | plane_state->src_h = crtc->mode.vdisplay << 16; | |
1095 | plane_state->src_w = crtc->mode.hdisplay << 16; | |
1096 | ||
1097 | return drm_plane_helper_commit(plane, plane_state, old_fb); | |
1098 | } | |
1099 | EXPORT_SYMBOL(drm_helper_crtc_mode_set_base); |