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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 DH |
38 | #include <drm/drm_crtc.h> |
39 | #include <drm/drm_fourcc.h> | |
40 | #include <drm/drm_crtc_helper.h> | |
41 | #include <drm/drm_fb_helper.h> | |
2f324b42 | 42 | #include <drm/drm_plane_helper.h> |
321ebf04 | 43 | #include <drm/drm_atomic_helper.h> |
760285e7 | 44 | #include <drm/drm_edid.h> |
f453ba04 | 45 | |
3150c7d0 DV |
46 | /** |
47 | * DOC: overview | |
48 | * | |
49 | * The CRTC modeset helper library provides a default set_config implementation | |
50 | * in drm_crtc_helper_set_config(). Plus a few other convenience functions using | |
51 | * the same callbacks which drivers can use to e.g. restore the modeset | |
52 | * configuration on resume with drm_helper_resume_force_mode(). | |
53 | * | |
2be94971 DV |
54 | * Note that this helper library doesn't track the current power state of CRTCs |
55 | * and encoders. It can call callbacks like ->dpms() even though the hardware is | |
56 | * already in the desired state. This deficiency has been fixed in the atomic | |
57 | * helpers. | |
58 | * | |
3150c7d0 DV |
59 | * The driver callbacks are mostly compatible with the atomic modeset helpers, |
60 | * except for the handling of the primary plane: Atomic helpers require that the | |
61 | * primary plane is implemented as a real standalone plane and not directly tied | |
62 | * to the CRTC state. For easier transition this library provides functions to | |
63 | * implement the old semantics required by the CRTC helpers using the new plane | |
64 | * and atomic helper callbacks. | |
65 | * | |
66 | * Drivers are strongly urged to convert to the atomic helpers (by way of first | |
67 | * converting to the plane helpers). New drivers must not use these functions | |
68 | * but need to implement the atomic interface instead, potentially using the | |
69 | * atomic helpers for that. | |
092d01da DV |
70 | * |
71 | * These legacy modeset helpers use the same function table structures as | |
72 | * all other modesetting helpers. See the documentation for struct | |
73 | * &drm_crtc_helper_funcs, struct &drm_encoder_helper_funcs and struct | |
74 | * &drm_connector_helper_funcs. | |
3150c7d0 | 75 | */ |
92b6f89f | 76 | |
0d4ed4c8 DV |
77 | /** |
78 | * drm_helper_move_panel_connectors_to_head() - move panels to the front in the | |
79 | * connector list | |
80 | * @dev: drm device to operate on | |
81 | * | |
82 | * Some userspace presumes that the first connected connector is the main | |
83 | * display, where it's supposed to display e.g. the login screen. For | |
84 | * laptops, this should be the main panel. Use this function to sort all | |
85 | * (eDP/LVDS) panels to the front of the connector list, instead of | |
86 | * painstakingly trying to initialize them in the right order. | |
87 | */ | |
cfc1a062 DV |
88 | void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) |
89 | { | |
90 | struct drm_connector *connector, *tmp; | |
91 | struct list_head panel_list; | |
92 | ||
93 | INIT_LIST_HEAD(&panel_list); | |
94 | ||
95 | list_for_each_entry_safe(connector, tmp, | |
96 | &dev->mode_config.connector_list, head) { | |
97 | if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || | |
98 | connector->connector_type == DRM_MODE_CONNECTOR_eDP) | |
99 | list_move_tail(&connector->head, &panel_list); | |
100 | } | |
101 | ||
102 | list_splice(&panel_list, &dev->mode_config.connector_list); | |
103 | } | |
104 | EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); | |
105 | ||
c9fb15f6 KP |
106 | /** |
107 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
108 | * @encoder: encoder to check | |
109 | * | |
3fcc42e0 DV |
110 | * Checks whether @encoder is with the current mode setting output configuration |
111 | * in use by any connector. This doesn't mean that it is actually enabled since | |
112 | * the DPMS state is tracked separately. | |
c9fb15f6 | 113 | * |
3fcc42e0 DV |
114 | * Returns: |
115 | * True if @encoder is used, false otherwise. | |
c9fb15f6 KP |
116 | */ |
117 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
118 | { | |
119 | struct drm_connector *connector; | |
120 | struct drm_device *dev = encoder->dev; | |
62ff94a5 | 121 | |
ba6f5826 SA |
122 | /* |
123 | * We can expect this mutex to be locked if we are not panicking. | |
124 | * Locking is currently fubar in the panic handler. | |
125 | */ | |
8d4ad9d4 | 126 | if (!oops_in_progress) { |
ba6f5826 | 127 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
8d4ad9d4 DA |
128 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
129 | } | |
ba6f5826 | 130 | |
9a9f5ce8 | 131 | drm_for_each_connector(connector, dev) |
c9fb15f6 KP |
132 | if (connector->encoder == encoder) |
133 | return true; | |
134 | return false; | |
135 | } | |
136 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
137 | ||
f453ba04 DA |
138 | /** |
139 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
140 | * @crtc: CRTC to check | |
141 | * | |
3fcc42e0 DV |
142 | * Checks whether @crtc is with the current mode setting output configuration |
143 | * in use by any connector. This doesn't mean that it is actually enabled since | |
144 | * the DPMS state is tracked separately. | |
f453ba04 | 145 | * |
3fcc42e0 DV |
146 | * Returns: |
147 | * True if @crtc is used, false otherwise. | |
f453ba04 DA |
148 | */ |
149 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
150 | { | |
151 | struct drm_encoder *encoder; | |
152 | struct drm_device *dev = crtc->dev; | |
62ff94a5 | 153 | |
ba6f5826 SA |
154 | /* |
155 | * We can expect this mutex to be locked if we are not panicking. | |
156 | * Locking is currently fubar in the panic handler. | |
157 | */ | |
158 | if (!oops_in_progress) | |
159 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
160 | ||
e4f62546 | 161 | drm_for_each_encoder(encoder, dev) |
c9fb15f6 | 162 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
163 | return true; |
164 | return false; | |
165 | } | |
166 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
167 | ||
86a1b9d1 BS |
168 | static void |
169 | drm_encoder_disable(struct drm_encoder *encoder) | |
170 | { | |
be26a66d | 171 | const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
86a1b9d1 | 172 | |
862e686c | 173 | drm_bridge_disable(encoder->bridge); |
3b336ec4 | 174 | |
86a1b9d1 BS |
175 | if (encoder_funcs->disable) |
176 | (*encoder_funcs->disable)(encoder); | |
177 | else | |
178 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
3b336ec4 | 179 | |
862e686c | 180 | drm_bridge_post_disable(encoder->bridge); |
86a1b9d1 BS |
181 | } |
182 | ||
b182cc59 | 183 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
f453ba04 DA |
184 | { |
185 | struct drm_encoder *encoder; | |
f453ba04 DA |
186 | struct drm_crtc *crtc; |
187 | ||
62ff94a5 DV |
188 | drm_warn_on_modeset_not_all_locked(dev); |
189 | ||
6295d607 | 190 | drm_for_each_encoder(encoder, dev) { |
92971021 | 191 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 192 | drm_encoder_disable(encoder); |
b5e6c1da | 193 | /* disconnect encoder from any connector */ |
9c552dd7 | 194 | encoder->crtc = NULL; |
a3a0544b | 195 | } |
f453ba04 DA |
196 | } |
197 | ||
6295d607 | 198 | drm_for_each_crtc(crtc, dev) { |
be26a66d | 199 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
f453ba04 DA |
200 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
201 | if (!crtc->enabled) { | |
5c8d7171 AD |
202 | if (crtc_funcs->disable) |
203 | (*crtc_funcs->disable)(crtc); | |
204 | else | |
205 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f4510a27 | 206 | crtc->primary->fb = NULL; |
f453ba04 DA |
207 | } |
208 | } | |
209 | } | |
b182cc59 DV |
210 | |
211 | /** | |
212 | * drm_helper_disable_unused_functions - disable unused objects | |
213 | * @dev: DRM device | |
214 | * | |
215 | * This function walks through the entire mode setting configuration of @dev. It | |
2be94971 DV |
216 | * will remove any CRTC links of unused encoders and encoder links of |
217 | * disconnected connectors. Then it will disable all unused encoders and CRTCs | |
b182cc59 DV |
218 | * either by calling their disable callback if available or by calling their |
219 | * dpms callback with DRM_MODE_DPMS_OFF. | |
09859d2a DV |
220 | * |
221 | * NOTE: | |
222 | * | |
223 | * This function is part of the legacy modeset helper library and will cause | |
224 | * major confusion with atomic drivers. This is because atomic helpers guarantee | |
225 | * to never call ->disable() hooks on a disabled function, or ->enable() hooks | |
226 | * on an enabled functions. drm_helper_disable_unused_functions() on the other | |
227 | * hand throws such guarantees into the wind and calls disable hooks | |
228 | * unconditionally on unused functions. | |
b182cc59 DV |
229 | */ |
230 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
231 | { | |
232 | drm_modeset_lock_all(dev); | |
233 | __drm_helper_disable_unused_functions(dev); | |
234 | drm_modeset_unlock_all(dev); | |
235 | } | |
f453ba04 DA |
236 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
237 | ||
7bec756c JB |
238 | /* |
239 | * Check the CRTC we're going to map each output to vs. its current | |
240 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
241 | * since the driver will have to re-route things. | |
242 | */ | |
243 | static void | |
244 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
245 | { | |
be26a66d | 246 | const struct drm_encoder_helper_funcs *encoder_funcs; |
7bec756c JB |
247 | struct drm_encoder *encoder; |
248 | ||
6295d607 | 249 | drm_for_each_encoder(encoder, dev) { |
7bec756c JB |
250 | encoder_funcs = encoder->helper_private; |
251 | /* Disable unused encoders */ | |
252 | if (encoder->crtc == NULL) | |
86a1b9d1 | 253 | drm_encoder_disable(encoder); |
7bec756c JB |
254 | /* Disable encoders whose CRTC is about to change */ |
255 | if (encoder_funcs->get_crtc && | |
256 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 257 | drm_encoder_disable(encoder); |
7bec756c JB |
258 | } |
259 | } | |
260 | ||
f453ba04 | 261 | /** |
0d4ed4c8 | 262 | * drm_crtc_helper_set_mode - internal helper to set a mode |
f453ba04 DA |
263 | * @crtc: CRTC to program |
264 | * @mode: mode to use | |
4c9287c6 AD |
265 | * @x: horizontal offset into the surface |
266 | * @y: vertical offset into the surface | |
0d4ed4c8 | 267 | * @old_fb: old framebuffer, for cleanup |
f453ba04 | 268 | * |
f453ba04 | 269 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
0d4ed4c8 DV |
270 | * to fixup or reject the mode prior to trying to set it. This is an internal |
271 | * helper that drivers could e.g. use to update properties that require the | |
272 | * entire output pipe to be disabled and re-enabled in a new configuration. For | |
273 | * example for changing whether audio is enabled on a hdmi link or for changing | |
274 | * panel fitter or dither attributes. It is also called by the | |
275 | * drm_crtc_helper_set_config() helper function to drive the mode setting | |
276 | * sequence. | |
f453ba04 | 277 | * |
3fcc42e0 DV |
278 | * Returns: |
279 | * True if the mode was set successfully, false otherwise. | |
f453ba04 DA |
280 | */ |
281 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
282 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
283 | int x, int y, |
284 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
285 | { |
286 | struct drm_device *dev = crtc->dev; | |
5a27528a | 287 | struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; |
be26a66d JN |
288 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
289 | const struct drm_encoder_helper_funcs *encoder_funcs; | |
f453ba04 | 290 | int saved_x, saved_y; |
7e99acdc | 291 | bool saved_enabled; |
f453ba04 DA |
292 | struct drm_encoder *encoder; |
293 | bool ret = true; | |
294 | ||
62ff94a5 DV |
295 | drm_warn_on_modeset_not_all_locked(dev); |
296 | ||
7e99acdc | 297 | saved_enabled = crtc->enabled; |
f453ba04 | 298 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
f453ba04 DA |
299 | if (!crtc->enabled) |
300 | return true; | |
301 | ||
021a8455 | 302 | adjusted_mode = drm_mode_duplicate(dev, mode); |
7e99acdc IH |
303 | if (!adjusted_mode) { |
304 | crtc->enabled = saved_enabled; | |
6bfc56aa | 305 | return false; |
7e99acdc | 306 | } |
021a8455 | 307 | |
f453ba04 | 308 | saved_mode = crtc->mode; |
5a27528a | 309 | saved_hwmode = crtc->hwmode; |
f453ba04 DA |
310 | saved_x = crtc->x; |
311 | saved_y = crtc->y; | |
312 | ||
313 | /* Update crtc values up front so the driver can rely on them for mode | |
314 | * setting. | |
315 | */ | |
316 | crtc->mode = *mode; | |
317 | crtc->x = x; | |
318 | crtc->y = y; | |
319 | ||
f453ba04 DA |
320 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
321 | * adjust it according to limitations or connector properties, and also | |
322 | * a chance to reject the mode entirely. | |
323 | */ | |
6295d607 | 324 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
325 | |
326 | if (encoder->crtc != crtc) | |
327 | continue; | |
3b336ec4 | 328 | |
862e686c AT |
329 | ret = drm_bridge_mode_fixup(encoder->bridge, |
330 | mode, adjusted_mode); | |
331 | if (!ret) { | |
332 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
333 | goto done; | |
3b336ec4 SP |
334 | } |
335 | ||
f453ba04 | 336 | encoder_funcs = encoder->helper_private; |
3c5b2673 CP |
337 | if (encoder_funcs->mode_fixup) { |
338 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
339 | adjusted_mode))) { | |
340 | DRM_DEBUG_KMS("Encoder fixup failed\n"); | |
341 | goto done; | |
342 | } | |
f453ba04 DA |
343 | } |
344 | } | |
345 | ||
49f718c5 CP |
346 | if (crtc_funcs->mode_fixup) { |
347 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, | |
348 | adjusted_mode))) { | |
349 | DRM_DEBUG_KMS("CRTC fixup failed\n"); | |
350 | goto done; | |
351 | } | |
f453ba04 | 352 | } |
fa3ab4c2 | 353 | DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); |
f453ba04 | 354 | |
5a27528a DS |
355 | crtc->hwmode = *adjusted_mode; |
356 | ||
f453ba04 | 357 | /* Prepare the encoders and CRTCs before setting the mode. */ |
6295d607 | 358 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
359 | |
360 | if (encoder->crtc != crtc) | |
361 | continue; | |
3b336ec4 | 362 | |
862e686c | 363 | drm_bridge_disable(encoder->bridge); |
3b336ec4 | 364 | |
f453ba04 DA |
365 | encoder_funcs = encoder->helper_private; |
366 | /* Disable the encoders as the first thing we do. */ | |
367 | encoder_funcs->prepare(encoder); | |
3b336ec4 | 368 | |
862e686c | 369 | drm_bridge_post_disable(encoder->bridge); |
f453ba04 DA |
370 | } |
371 | ||
7bec756c JB |
372 | drm_crtc_prepare_encoders(dev); |
373 | ||
f453ba04 DA |
374 | crtc_funcs->prepare(crtc); |
375 | ||
376 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
377 | * on the DPLL. | |
378 | */ | |
5c3b82e2 CW |
379 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
380 | if (!ret) | |
381 | goto done; | |
f453ba04 | 382 | |
6295d607 | 383 | drm_for_each_encoder(encoder, dev) { |
f453ba04 DA |
384 | |
385 | if (encoder->crtc != crtc) | |
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); |
f453ba04 DA |
391 | encoder_funcs = encoder->helper_private; |
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 | ||
862e686c | 405 | drm_bridge_pre_enable(encoder->bridge); |
3b336ec4 | 406 | |
f453ba04 DA |
407 | encoder_funcs = encoder->helper_private; |
408 | encoder_funcs->commit(encoder); | |
409 | ||
862e686c | 410 | drm_bridge_enable(encoder->bridge); |
f453ba04 DA |
411 | } |
412 | ||
27641c3f MK |
413 | /* Calculate and store various constants which |
414 | * are later needed by vblank and swap-completion | |
415 | * timestamping. They are derived from true hwmode. | |
416 | */ | |
545cdd55 | 417 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
27641c3f | 418 | |
f453ba04 DA |
419 | /* FIXME: add subpixel order */ |
420 | done: | |
021a8455 | 421 | drm_mode_destroy(dev, adjusted_mode); |
f453ba04 | 422 | if (!ret) { |
7e99acdc | 423 | crtc->enabled = saved_enabled; |
f453ba04 | 424 | crtc->mode = saved_mode; |
5a27528a | 425 | crtc->hwmode = saved_hwmode; |
f453ba04 DA |
426 | crtc->x = saved_x; |
427 | crtc->y = saved_y; | |
428 | } | |
429 | ||
430 | return ret; | |
431 | } | |
432 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
433 | ||
a74591d7 | 434 | static void |
6eebd6bb CW |
435 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
436 | { | |
437 | struct drm_device *dev = crtc->dev; | |
438 | struct drm_connector *connector; | |
439 | struct drm_encoder *encoder; | |
440 | ||
441 | /* Decouple all encoders and their attached connectors from this crtc */ | |
6295d607 | 442 | drm_for_each_encoder(encoder, dev) { |
6eebd6bb CW |
443 | if (encoder->crtc != crtc) |
444 | continue; | |
445 | ||
6295d607 | 446 | drm_for_each_connector(connector, dev) { |
6eebd6bb CW |
447 | if (connector->encoder != encoder) |
448 | continue; | |
449 | ||
450 | connector->encoder = NULL; | |
a6ad6230 TR |
451 | |
452 | /* | |
453 | * drm_helper_disable_unused_functions() ought to be | |
454 | * doing this, but since we've decoupled the encoder | |
455 | * from the connector above, the required connection | |
456 | * between them is henceforth no longer available. | |
457 | */ | |
458 | connector->dpms = DRM_MODE_DPMS_OFF; | |
6eebd6bb CW |
459 | } |
460 | } | |
461 | ||
b182cc59 | 462 | __drm_helper_disable_unused_functions(dev); |
6eebd6bb CW |
463 | } |
464 | ||
f453ba04 DA |
465 | /** |
466 | * drm_crtc_helper_set_config - set a new config from userspace | |
0d4ed4c8 | 467 | * @set: mode set configuration |
f453ba04 | 468 | * |
2be94971 DV |
469 | * The drm_crtc_helper_set_config() helper function implements the set_config |
470 | * callback of struct &drm_crtc_funcs for drivers using the legacy CRTC helpers. | |
471 | * | |
472 | * It first tries to locate the best encoder for each connector by calling the | |
473 | * connector ->best_encoder() (struct &drm_connector_helper_funcs) helper | |
474 | * operation. | |
475 | * | |
476 | * After locating the appropriate encoders, the helper function will call the | |
477 | * mode_fixup encoder and CRTC helper operations to adjust the requested mode, | |
478 | * or reject it completely in which case an error will be returned to the | |
479 | * application. If the new configuration after mode adjustment is identical to | |
480 | * the current configuration the helper function will return without performing | |
481 | * any other operation. | |
482 | * | |
483 | * If the adjusted mode is identical to the current mode but changes to the | |
484 | * frame buffer need to be applied, the drm_crtc_helper_set_config() function | |
485 | * will call the CRTC ->mode_set_base() (struct &drm_crtc_helper_funcs) helper | |
486 | * operation. | |
487 | * | |
488 | * If the adjusted mode differs from the current mode, or if the | |
489 | * ->mode_set_base() helper operation is not provided, the helper function | |
490 | * performs a full mode set sequence by calling the ->prepare(), ->mode_set() | |
491 | * and ->commit() CRTC and encoder helper operations, in that order. | |
492 | * Alternatively it can also use the dpms and disable helper operations. For | |
493 | * details see struct &drm_crtc_helper_funcs and struct | |
494 | * &drm_encoder_helper_funcs. | |
495 | * | |
496 | * This function is deprecated. New drivers must implement atomic modeset | |
497 | * support, for which this function is unsuitable. Instead drivers should use | |
498 | * drm_atomic_helper_set_config(). | |
f453ba04 | 499 | * |
3fcc42e0 DV |
500 | * Returns: |
501 | * Returns 0 on success, negative errno numbers on failure. | |
f453ba04 DA |
502 | */ |
503 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
504 | { | |
505 | struct drm_device *dev; | |
02ee4e94 | 506 | struct drm_crtc *new_crtc; |
e67aae79 | 507 | struct drm_encoder *save_encoders, *new_encoder, *encoder; |
4cb72b17 JB |
508 | bool mode_changed = false; /* if true do a full mode set */ |
509 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
e67aae79 | 510 | struct drm_connector *save_connectors, *connector; |
f453ba04 | 511 | int count = 0, ro, fail = 0; |
be26a66d | 512 | const struct drm_crtc_helper_funcs *crtc_funcs; |
c5006cfe | 513 | struct drm_mode_set save_set; |
4a1b0714 | 514 | int ret; |
bf9dc102 | 515 | int i; |
f453ba04 | 516 | |
58367ed6 | 517 | DRM_DEBUG_KMS("\n"); |
f453ba04 | 518 | |
e58de880 DV |
519 | BUG_ON(!set); |
520 | BUG_ON(!set->crtc); | |
521 | BUG_ON(!set->crtc->helper_private); | |
f453ba04 | 522 | |
e58de880 DV |
523 | /* Enforce sane interface api - has been abused by the fb helper. */ |
524 | BUG_ON(!set->mode && set->fb); | |
525 | BUG_ON(set->fb && set->num_connectors == 0); | |
f453ba04 DA |
526 | |
527 | crtc_funcs = set->crtc->helper_private; | |
528 | ||
ede3ff52 CW |
529 | if (!set->mode) |
530 | set->fb = NULL; | |
531 | ||
9440106b | 532 | if (set->fb) { |
fa3ab4c2 VS |
533 | DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n", |
534 | set->crtc->base.id, set->crtc->name, | |
535 | set->fb->base.id, | |
536 | (int)set->num_connectors, set->x, set->y); | |
9440106b | 537 | } else { |
fa3ab4c2 VS |
538 | DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n", |
539 | set->crtc->base.id, set->crtc->name); | |
a74591d7 TR |
540 | drm_crtc_helper_disable(set->crtc); |
541 | return 0; | |
9440106b | 542 | } |
f453ba04 DA |
543 | |
544 | dev = set->crtc->dev; | |
545 | ||
62ff94a5 DV |
546 | drm_warn_on_modeset_not_all_locked(dev); |
547 | ||
02ee4e94 IH |
548 | /* |
549 | * Allocate space for the backup of all (non-pointer) encoder and | |
550 | * connector data. | |
551 | */ | |
e67aae79 MM |
552 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
553 | sizeof(struct drm_encoder), GFP_KERNEL); | |
02ee4e94 | 554 | if (!save_encoders) |
f453ba04 | 555 | return -ENOMEM; |
f453ba04 | 556 | |
e67aae79 MM |
557 | save_connectors = kzalloc(dev->mode_config.num_connector * |
558 | sizeof(struct drm_connector), GFP_KERNEL); | |
559 | if (!save_connectors) { | |
e67aae79 MM |
560 | kfree(save_encoders); |
561 | return -ENOMEM; | |
562 | } | |
563 | ||
02ee4e94 IH |
564 | /* |
565 | * Copy data. Note that driver private data is not affected. | |
e67aae79 MM |
566 | * Should anything bad happen only the expected state is |
567 | * restored, not the drivers personal bookkeeping. | |
568 | */ | |
e67aae79 | 569 | count = 0; |
6295d607 | 570 | drm_for_each_encoder(encoder, dev) { |
e67aae79 MM |
571 | save_encoders[count++] = *encoder; |
572 | } | |
573 | ||
574 | count = 0; | |
6295d607 | 575 | drm_for_each_connector(connector, dev) { |
e67aae79 MM |
576 | save_connectors[count++] = *connector; |
577 | } | |
578 | ||
c5006cfe JB |
579 | save_set.crtc = set->crtc; |
580 | save_set.mode = &set->crtc->mode; | |
581 | save_set.x = set->crtc->x; | |
582 | save_set.y = set->crtc->y; | |
f4510a27 | 583 | save_set.fb = set->crtc->primary->fb; |
c5006cfe | 584 | |
f453ba04 DA |
585 | /* We should be able to check here if the fb has the same properties |
586 | * and then just flip_or_move it */ | |
f4510a27 | 587 | if (set->crtc->primary->fb != set->fb) { |
712531bf | 588 | /* If we have no fb then treat it as a full mode set */ |
f4510a27 | 589 | if (set->crtc->primary->fb == NULL) { |
58367ed6 | 590 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 591 | mode_changed = true; |
ce83adf7 | 592 | } else if (set->fb->pixel_format != |
f4510a27 | 593 | set->crtc->primary->fb->pixel_format) { |
ce83adf7 | 594 | mode_changed = true; |
8dff4742 | 595 | } else |
712531bf | 596 | fb_changed = true; |
f453ba04 DA |
597 | } |
598 | ||
599 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 600 | fb_changed = true; |
f453ba04 | 601 | |
2deafc7e | 602 | if (!drm_mode_equal(set->mode, &set->crtc->mode)) { |
58367ed6 | 603 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
604 | drm_mode_debug_printmodeline(&set->crtc->mode); |
605 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 606 | mode_changed = true; |
f453ba04 DA |
607 | } |
608 | ||
609 | /* a) traverse passed in connector list and get encoders for them */ | |
610 | count = 0; | |
6295d607 | 611 | drm_for_each_connector(connector, dev) { |
be26a66d | 612 | const struct drm_connector_helper_funcs *connector_funcs = |
f453ba04 | 613 | connector->helper_private; |
f453ba04 DA |
614 | new_encoder = connector->encoder; |
615 | for (ro = 0; ro < set->num_connectors; ro++) { | |
616 | if (set->connectors[ro] == connector) { | |
617 | new_encoder = connector_funcs->best_encoder(connector); | |
618 | /* if we can't get an encoder for a connector | |
619 | we are setting now - then fail */ | |
620 | if (new_encoder == NULL) | |
621 | /* don't break so fail path works correct */ | |
622 | fail = 1; | |
25f397a4 DV |
623 | |
624 | if (connector->dpms != DRM_MODE_DPMS_ON) { | |
625 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); | |
626 | mode_changed = true; | |
627 | } | |
177cf92d DV |
628 | |
629 | break; | |
f453ba04 DA |
630 | } |
631 | } | |
632 | ||
633 | if (new_encoder != connector->encoder) { | |
58367ed6 | 634 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 635 | mode_changed = true; |
ff846ab7 MM |
636 | /* If the encoder is reused for another connector, then |
637 | * the appropriate crtc will be set later. | |
638 | */ | |
ff6fdbed MM |
639 | if (connector->encoder) |
640 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
641 | connector->encoder = new_encoder; |
642 | } | |
643 | } | |
644 | ||
645 | if (fail) { | |
646 | ret = -EINVAL; | |
e67aae79 | 647 | goto fail; |
f453ba04 DA |
648 | } |
649 | ||
650 | count = 0; | |
6295d607 | 651 | drm_for_each_connector(connector, dev) { |
f453ba04 DA |
652 | if (!connector->encoder) |
653 | continue; | |
654 | ||
f453ba04 DA |
655 | if (connector->encoder->crtc == set->crtc) |
656 | new_crtc = NULL; | |
657 | else | |
658 | new_crtc = connector->encoder->crtc; | |
659 | ||
660 | for (ro = 0; ro < set->num_connectors; ro++) { | |
661 | if (set->connectors[ro] == connector) | |
662 | new_crtc = set->crtc; | |
663 | } | |
7bec756c JB |
664 | |
665 | /* Make sure the new CRTC will work with the encoder */ | |
666 | if (new_crtc && | |
667 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
668 | ret = -EINVAL; | |
e67aae79 | 669 | goto fail; |
7bec756c | 670 | } |
f453ba04 | 671 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 672 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 673 | mode_changed = true; |
f453ba04 DA |
674 | connector->encoder->crtc = new_crtc; |
675 | } | |
9440106b | 676 | if (new_crtc) { |
fa3ab4c2 VS |
677 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n", |
678 | connector->base.id, connector->name, | |
679 | new_crtc->base.id, new_crtc->name); | |
9440106b JG |
680 | } else { |
681 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
fa3ab4c2 | 682 | connector->base.id, connector->name); |
9440106b | 683 | } |
f453ba04 DA |
684 | } |
685 | ||
686 | /* mode_set_base is not a required function */ | |
712531bf JB |
687 | if (fb_changed && !crtc_funcs->mode_set_base) |
688 | mode_changed = true; | |
f453ba04 | 689 | |
712531bf | 690 | if (mode_changed) { |
48b1f5dd | 691 | if (drm_helper_crtc_in_use(set->crtc)) { |
58367ed6 ZY |
692 | DRM_DEBUG_KMS("attempting to set mode from" |
693 | " userspace\n"); | |
f453ba04 | 694 | drm_mode_debug_printmodeline(set->mode); |
f4510a27 | 695 | set->crtc->primary->fb = set->fb; |
f453ba04 | 696 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
3c4fdcfb | 697 | set->x, set->y, |
bec2eac3 | 698 | save_set.fb)) { |
fa3ab4c2 VS |
699 | DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n", |
700 | set->crtc->base.id, set->crtc->name); | |
f4510a27 | 701 | set->crtc->primary->fb = save_set.fb; |
f453ba04 | 702 | ret = -EINVAL; |
e67aae79 | 703 | goto fail; |
f453ba04 | 704 | } |
25f397a4 DV |
705 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
706 | for (i = 0; i < set->num_connectors; i++) { | |
707 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, | |
25933820 | 708 | set->connectors[i]->name); |
25f397a4 DV |
709 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
710 | } | |
f453ba04 | 711 | } |
b182cc59 | 712 | __drm_helper_disable_unused_functions(dev); |
712531bf | 713 | } else if (fb_changed) { |
9b1596af BS |
714 | set->crtc->x = set->x; |
715 | set->crtc->y = set->y; | |
f4510a27 | 716 | set->crtc->primary->fb = set->fb; |
5c3b82e2 | 717 | ret = crtc_funcs->mode_set_base(set->crtc, |
bec2eac3 | 718 | set->x, set->y, save_set.fb); |
0ba41e44 | 719 | if (ret != 0) { |
fbce4064 IH |
720 | set->crtc->x = save_set.x; |
721 | set->crtc->y = save_set.y; | |
f4510a27 | 722 | set->crtc->primary->fb = save_set.fb; |
e67aae79 | 723 | goto fail; |
0ba41e44 | 724 | } |
f453ba04 DA |
725 | } |
726 | ||
e67aae79 | 727 | kfree(save_connectors); |
f453ba04 | 728 | kfree(save_encoders); |
f453ba04 DA |
729 | return 0; |
730 | ||
e67aae79 MM |
731 | fail: |
732 | /* Restore all previous data. */ | |
e67aae79 | 733 | count = 0; |
6295d607 | 734 | drm_for_each_encoder(encoder, dev) { |
e67aae79 | 735 | *encoder = save_encoders[count++]; |
e62fb64e | 736 | } |
e67aae79 | 737 | |
f453ba04 | 738 | count = 0; |
6295d607 | 739 | drm_for_each_connector(connector, dev) { |
e67aae79 | 740 | *connector = save_connectors[count++]; |
f453ba04 | 741 | } |
e67aae79 | 742 | |
c5006cfe JB |
743 | /* Try to restore the config */ |
744 | if (mode_changed && | |
745 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, | |
746 | save_set.y, save_set.fb)) | |
747 | DRM_ERROR("failed to restore config after modeset failure\n"); | |
748 | ||
e67aae79 | 749 | kfree(save_connectors); |
f453ba04 DA |
750 | kfree(save_encoders); |
751 | return ret; | |
752 | } | |
753 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
754 | ||
c9fb15f6 KP |
755 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
756 | { | |
757 | int dpms = DRM_MODE_DPMS_OFF; | |
758 | struct drm_connector *connector; | |
759 | struct drm_device *dev = encoder->dev; | |
760 | ||
9a9f5ce8 | 761 | drm_for_each_connector(connector, dev) |
c9fb15f6 KP |
762 | if (connector->encoder == encoder) |
763 | if (connector->dpms < dpms) | |
764 | dpms = connector->dpms; | |
765 | return dpms; | |
766 | } | |
767 | ||
3b336ec4 SP |
768 | /* Helper which handles bridge ordering around encoder dpms */ |
769 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) | |
770 | { | |
771 | struct drm_bridge *bridge = encoder->bridge; | |
be26a66d | 772 | const struct drm_encoder_helper_funcs *encoder_funcs; |
3b336ec4 | 773 | |
862e686c AT |
774 | if (mode == DRM_MODE_DPMS_ON) |
775 | drm_bridge_pre_enable(bridge); | |
776 | else | |
777 | drm_bridge_disable(bridge); | |
3b336ec4 SP |
778 | |
779 | encoder_funcs = encoder->helper_private; | |
780 | if (encoder_funcs->dpms) | |
781 | encoder_funcs->dpms(encoder, mode); | |
782 | ||
862e686c AT |
783 | if (mode == DRM_MODE_DPMS_ON) |
784 | drm_bridge_enable(bridge); | |
785 | else | |
786 | drm_bridge_post_disable(bridge); | |
3b336ec4 SP |
787 | } |
788 | ||
c9fb15f6 KP |
789 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
790 | { | |
791 | int dpms = DRM_MODE_DPMS_OFF; | |
792 | struct drm_connector *connector; | |
793 | struct drm_device *dev = crtc->dev; | |
794 | ||
9a9f5ce8 | 795 | drm_for_each_connector(connector, dev) |
c9fb15f6 KP |
796 | if (connector->encoder && connector->encoder->crtc == crtc) |
797 | if (connector->dpms < dpms) | |
798 | dpms = connector->dpms; | |
799 | return dpms; | |
800 | } | |
801 | ||
802 | /** | |
0d4ed4c8 DV |
803 | * drm_helper_connector_dpms() - connector dpms helper implementation |
804 | * @connector: affected connector | |
805 | * @mode: DPMS mode | |
c9fb15f6 | 806 | * |
2be94971 DV |
807 | * The drm_helper_connector_dpms() helper function implements the ->dpms() |
808 | * callback of struct &drm_connector_funcs for drivers using the legacy CRTC helpers. | |
809 | * | |
810 | * This is the main helper function provided by the CRTC helper framework for | |
0d4ed4c8 | 811 | * implementing the DPMS connector attribute. It computes the new desired DPMS |
2be94971 DV |
812 | * state for all encoders and CRTCs in the output mesh and calls the ->dpms() |
813 | * callbacks provided by the driver in struct &drm_crtc_helper_funcs and struct | |
814 | * &drm_encoder_helper_funcs appropriately. | |
815 | * | |
816 | * This function is deprecated. New drivers must implement atomic modeset | |
817 | * support, for which this function is unsuitable. Instead drivers should use | |
818 | * drm_atomic_helper_connector_dpms(). | |
9a69a9ac ML |
819 | * |
820 | * Returns: | |
821 | * Always returns 0. | |
c9fb15f6 | 822 | */ |
9a69a9ac | 823 | int drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
c9fb15f6 KP |
824 | { |
825 | struct drm_encoder *encoder = connector->encoder; | |
826 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
3b336ec4 | 827 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
c9fb15f6 KP |
828 | |
829 | if (mode == connector->dpms) | |
9a69a9ac | 830 | return 0; |
c9fb15f6 KP |
831 | |
832 | old_dpms = connector->dpms; | |
833 | connector->dpms = mode; | |
834 | ||
3b336ec4 SP |
835 | if (encoder) |
836 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); | |
837 | ||
c9fb15f6 KP |
838 | /* from off to on, do crtc then encoder */ |
839 | if (mode < old_dpms) { | |
840 | if (crtc) { | |
be26a66d | 841 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
c9fb15f6 KP |
842 | if (crtc_funcs->dpms) |
843 | (*crtc_funcs->dpms) (crtc, | |
844 | drm_helper_choose_crtc_dpms(crtc)); | |
845 | } | |
3b336ec4 SP |
846 | if (encoder) |
847 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
848 | } |
849 | ||
850 | /* from on to off, do encoder then crtc */ | |
851 | if (mode > old_dpms) { | |
3b336ec4 SP |
852 | if (encoder) |
853 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 | 854 | if (crtc) { |
be26a66d | 855 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
c9fb15f6 KP |
856 | if (crtc_funcs->dpms) |
857 | (*crtc_funcs->dpms) (crtc, | |
858 | drm_helper_choose_crtc_dpms(crtc)); | |
859 | } | |
860 | } | |
861 | ||
9a69a9ac | 862 | return 0; |
c9fb15f6 KP |
863 | } |
864 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
865 | ||
3fcc42e0 DV |
866 | /** |
867 | * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata | |
868 | * @fb: drm_framebuffer object to fill out | |
869 | * @mode_cmd: metadata from the userspace fb creation request | |
870 | * | |
871 | * This helper can be used in a drivers fb_create callback to pre-fill the fb's | |
872 | * metadata fields. | |
873 | */ | |
9fd93784 | 874 | void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
1eb83451 | 875 | const struct drm_mode_fb_cmd2 *mode_cmd) |
f453ba04 | 876 | { |
01f2c773 VS |
877 | int i; |
878 | ||
f453ba04 DA |
879 | fb->width = mode_cmd->width; |
880 | fb->height = mode_cmd->height; | |
01f2c773 VS |
881 | for (i = 0; i < 4; i++) { |
882 | fb->pitches[i] = mode_cmd->pitches[i]; | |
883 | fb->offsets[i] = mode_cmd->offsets[i]; | |
e3eb3250 | 884 | fb->modifier[i] = mode_cmd->modifier[i]; |
01f2c773 | 885 | } |
248dbc23 | 886 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
308e5bcb JB |
887 | &fb->bits_per_pixel); |
888 | fb->pixel_format = mode_cmd->pixel_format; | |
d980b183 | 889 | fb->flags = mode_cmd->flags; |
f453ba04 DA |
890 | } |
891 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
892 | ||
aa4cd910 DV |
893 | /** |
894 | * drm_helper_resume_force_mode - force-restore mode setting configuration | |
895 | * @dev: drm_device which should be restored | |
896 | * | |
897 | * Drivers which use the mode setting helpers can use this function to | |
898 | * force-restore the mode setting configuration e.g. on resume or when something | |
899 | * else might have trampled over the hw state (like some overzealous old BIOSen | |
900 | * tended to do). | |
00d762cb DV |
901 | * |
902 | * This helper doesn't provide a error return value since restoring the old | |
903 | * config should never fail due to resource allocation issues since the driver | |
904 | * has successfully set the restored configuration already. Hence this should | |
905 | * boil down to the equivalent of a few dpms on calls, which also don't provide | |
906 | * an error code. | |
907 | * | |
908 | * Drivers where simply restoring an old configuration again might fail (e.g. | |
909 | * due to slight differences in allocating shared resources when the | |
910 | * configuration is restored in a different order than when userspace set it up) | |
911 | * need to use their own restore logic. | |
14942760 TR |
912 | * |
913 | * This function is deprecated. New drivers should implement atomic mode- | |
914 | * setting and use the atomic suspend/resume helpers. | |
915 | * | |
916 | * See also: | |
917 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
aa4cd910 | 918 | */ |
00d762cb | 919 | void drm_helper_resume_force_mode(struct drm_device *dev) |
f453ba04 DA |
920 | { |
921 | struct drm_crtc *crtc; | |
89347bb8 | 922 | struct drm_encoder *encoder; |
be26a66d | 923 | const struct drm_crtc_helper_funcs *crtc_funcs; |
00d762cb DV |
924 | int encoder_dpms; |
925 | bool ret; | |
f453ba04 | 926 | |
3ea87855 | 927 | drm_modeset_lock_all(dev); |
6295d607 | 928 | drm_for_each_crtc(crtc, dev) { |
f453ba04 DA |
929 | |
930 | if (!crtc->enabled) | |
931 | continue; | |
932 | ||
3c4fdcfb | 933 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
f4510a27 | 934 | crtc->x, crtc->y, crtc->primary->fb); |
f453ba04 | 935 | |
00d762cb | 936 | /* Restoring the old config should never fail! */ |
f453ba04 DA |
937 | if (ret == false) |
938 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
939 | |
940 | /* Turn off outputs that were already powered off */ | |
941 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
6295d607 | 942 | drm_for_each_encoder(encoder, dev) { |
89347bb8 DJ |
943 | |
944 | if(encoder->crtc != crtc) | |
945 | continue; | |
946 | ||
3b336ec4 SP |
947 | encoder_dpms = drm_helper_choose_encoder_dpms( |
948 | encoder); | |
949 | ||
950 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
89347bb8 | 951 | } |
817e631e CW |
952 | |
953 | crtc_funcs = crtc->helper_private; | |
954 | if (crtc_funcs->dpms) | |
955 | (*crtc_funcs->dpms) (crtc, | |
956 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 957 | } |
f453ba04 | 958 | } |
00d762cb | 959 | |
af4fcb57 | 960 | /* disable the unused connectors while restoring the modesetting */ |
b182cc59 | 961 | __drm_helper_disable_unused_functions(dev); |
3ea87855 | 962 | drm_modeset_unlock_all(dev); |
f453ba04 DA |
963 | } |
964 | EXPORT_SYMBOL(drm_helper_resume_force_mode); | |
2f324b42 DV |
965 | |
966 | /** | |
967 | * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers | |
968 | * @crtc: DRM CRTC | |
969 | * @mode: DRM display mode which userspace requested | |
970 | * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks | |
971 | * @x: x offset of the CRTC scanout area on the underlying framebuffer | |
972 | * @y: y offset of the CRTC scanout area on the underlying framebuffer | |
973 | * @old_fb: previous framebuffer | |
974 | * | |
975 | * This function implements a callback useable as the ->mode_set callback | |
2be94971 | 976 | * required by the CRTC helpers. Besides the atomic plane helper functions for |
2f324b42 | 977 | * the primary plane the driver must also provide the ->mode_set_nofb callback |
2be94971 | 978 | * to set up the CRTC. |
2f324b42 DV |
979 | * |
980 | * This is a transitional helper useful for converting drivers to the atomic | |
981 | * interfaces. | |
982 | */ | |
983 | int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
984 | struct drm_display_mode *adjusted_mode, int x, int y, | |
985 | struct drm_framebuffer *old_fb) | |
986 | { | |
987 | struct drm_crtc_state *crtc_state; | |
be26a66d | 988 | const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
2f324b42 DV |
989 | int ret; |
990 | ||
991 | if (crtc->funcs->atomic_duplicate_state) | |
992 | crtc_state = crtc->funcs->atomic_duplicate_state(crtc); | |
e4f31ad2 DV |
993 | else { |
994 | if (!crtc->state) | |
995 | drm_atomic_helper_crtc_reset(crtc); | |
996 | ||
ce14ec20 | 997 | crtc_state = drm_atomic_helper_crtc_duplicate_state(crtc); |
e4f31ad2 | 998 | } |
ce14ec20 DV |
999 | |
1000 | if (!crtc_state) | |
1001 | return -ENOMEM; | |
2f324b42 | 1002 | |
2f324b42 | 1003 | crtc_state->planes_changed = true; |
623369e5 | 1004 | crtc_state->mode_changed = true; |
819364da DS |
1005 | ret = drm_atomic_set_mode_for_crtc(crtc_state, mode); |
1006 | if (ret) | |
1007 | goto out; | |
2f324b42 DV |
1008 | drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode); |
1009 | ||
1010 | if (crtc_funcs->atomic_check) { | |
1011 | ret = crtc_funcs->atomic_check(crtc, crtc_state); | |
9f658b7b DS |
1012 | if (ret) |
1013 | goto out; | |
2f324b42 DV |
1014 | } |
1015 | ||
1016 | swap(crtc->state, crtc_state); | |
1017 | ||
1018 | crtc_funcs->mode_set_nofb(crtc); | |
1019 | ||
9f658b7b DS |
1020 | ret = drm_helper_crtc_mode_set_base(crtc, x, y, old_fb); |
1021 | ||
1022 | out: | |
ce14ec20 DV |
1023 | if (crtc_state) { |
1024 | if (crtc->funcs->atomic_destroy_state) | |
1025 | crtc->funcs->atomic_destroy_state(crtc, crtc_state); | |
1026 | else | |
1027 | drm_atomic_helper_crtc_destroy_state(crtc, crtc_state); | |
2f324b42 DV |
1028 | } |
1029 | ||
9f658b7b | 1030 | return ret; |
2f324b42 DV |
1031 | } |
1032 | EXPORT_SYMBOL(drm_helper_crtc_mode_set); | |
1033 | ||
1034 | /** | |
1035 | * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers | |
1036 | * @crtc: DRM CRTC | |
1037 | * @x: x offset of the CRTC scanout area on the underlying framebuffer | |
1038 | * @y: y offset of the CRTC scanout area on the underlying framebuffer | |
1039 | * @old_fb: previous framebuffer | |
1040 | * | |
1041 | * This function implements a callback useable as the ->mode_set_base used | |
2be94971 | 1042 | * required by the CRTC helpers. The driver must provide the atomic plane helper |
2f324b42 DV |
1043 | * functions for the primary plane. |
1044 | * | |
1045 | * This is a transitional helper useful for converting drivers to the atomic | |
1046 | * interfaces. | |
1047 | */ | |
1048 | int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, | |
1049 | struct drm_framebuffer *old_fb) | |
1050 | { | |
1051 | struct drm_plane_state *plane_state; | |
1052 | struct drm_plane *plane = crtc->primary; | |
1053 | ||
1054 | if (plane->funcs->atomic_duplicate_state) | |
1055 | plane_state = plane->funcs->atomic_duplicate_state(plane); | |
6c148380 LY |
1056 | else { |
1057 | if (!plane->state) | |
1058 | drm_atomic_helper_plane_reset(plane); | |
1059 | ||
321ebf04 | 1060 | plane_state = drm_atomic_helper_plane_duplicate_state(plane); |
6c148380 | 1061 | } |
2f324b42 DV |
1062 | if (!plane_state) |
1063 | return -ENOMEM; | |
07cc0ef6 | 1064 | plane_state->plane = plane; |
2f324b42 DV |
1065 | |
1066 | plane_state->crtc = crtc; | |
321ebf04 | 1067 | drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb); |
2f324b42 DV |
1068 | plane_state->crtc_x = 0; |
1069 | plane_state->crtc_y = 0; | |
1070 | plane_state->crtc_h = crtc->mode.vdisplay; | |
1071 | plane_state->crtc_w = crtc->mode.hdisplay; | |
1072 | plane_state->src_x = x << 16; | |
1073 | plane_state->src_y = y << 16; | |
1074 | plane_state->src_h = crtc->mode.vdisplay << 16; | |
1075 | plane_state->src_w = crtc->mode.hdisplay << 16; | |
1076 | ||
1077 | return drm_plane_helper_commit(plane, plane_state, old_fb); | |
1078 | } | |
1079 | EXPORT_SYMBOL(drm_helper_crtc_mode_set_base); | |
5488dc16 LL |
1080 | |
1081 | /** | |
1082 | * drm_helper_crtc_enable_color_mgmt - enable color management properties | |
1083 | * @crtc: DRM CRTC | |
1084 | * @degamma_lut_size: the size of the degamma lut (before CSC) | |
1085 | * @gamma_lut_size: the size of the gamma lut (after CSC) | |
1086 | * | |
1087 | * This function lets the driver enable the color correction properties on a | |
1088 | * CRTC. This includes 3 degamma, csc and gamma properties that userspace can | |
1089 | * set and 2 size properties to inform the userspace of the lut sizes. | |
1090 | */ | |
1091 | void drm_helper_crtc_enable_color_mgmt(struct drm_crtc *crtc, | |
1092 | int degamma_lut_size, | |
1093 | int gamma_lut_size) | |
1094 | { | |
1095 | struct drm_device *dev = crtc->dev; | |
1096 | struct drm_mode_config *config = &dev->mode_config; | |
1097 | ||
1098 | drm_object_attach_property(&crtc->base, | |
1099 | config->degamma_lut_property, 0); | |
1100 | drm_object_attach_property(&crtc->base, | |
1101 | config->ctm_property, 0); | |
1102 | drm_object_attach_property(&crtc->base, | |
1103 | config->gamma_lut_property, 0); | |
1104 | ||
1105 | drm_object_attach_property(&crtc->base, | |
1106 | config->degamma_lut_size_property, | |
1107 | degamma_lut_size); | |
1108 | drm_object_attach_property(&crtc->base, | |
1109 | config->gamma_lut_size_property, | |
1110 | gamma_lut_size); | |
1111 | } | |
1112 | EXPORT_SYMBOL(drm_helper_crtc_enable_color_mgmt); |