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f453ba04 DA |
1 | /* |
2 | * Copyright (c) 2006-2008 Intel Corporation | |
3 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
4 | * | |
5 | * DRM core CRTC related functions | |
6 | * | |
7 | * Permission to use, copy, modify, distribute, and sell this software and its | |
8 | * documentation for any purpose is hereby granted without fee, provided that | |
9 | * the above copyright notice appear in all copies and that both that copyright | |
10 | * notice and this permission notice appear in supporting documentation, and | |
11 | * that the name of the copyright holders not be used in advertising or | |
12 | * publicity pertaining to distribution of the software without specific, | |
13 | * written prior permission. The copyright holders make no representations | |
14 | * about the suitability of this software for any purpose. It is provided "as | |
15 | * is" without express or implied warranty. | |
16 | * | |
17 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
18 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
19 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
20 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
21 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
22 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
23 | * OF THIS SOFTWARE. | |
24 | * | |
25 | * Authors: | |
26 | * Keith Packard | |
27 | * Eric Anholt <eric@anholt.net> | |
28 | * Dave Airlie <airlied@linux.ie> | |
29 | * Jesse Barnes <jesse.barnes@intel.com> | |
30 | */ | |
31 | ||
2d1a8a48 | 32 | #include <linux/export.h> |
0603ba14 | 33 | #include <linux/moduleparam.h> |
2d1a8a48 | 34 | |
760285e7 DH |
35 | #include <drm/drmP.h> |
36 | #include <drm/drm_crtc.h> | |
37 | #include <drm/drm_fourcc.h> | |
38 | #include <drm/drm_crtc_helper.h> | |
39 | #include <drm/drm_fb_helper.h> | |
40 | #include <drm/drm_edid.h> | |
f453ba04 | 41 | |
92b6f89f DV |
42 | MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
43 | MODULE_DESCRIPTION("DRM KMS helper"); | |
44 | MODULE_LICENSE("GPL and additional rights"); | |
45 | ||
0d4ed4c8 DV |
46 | /** |
47 | * drm_helper_move_panel_connectors_to_head() - move panels to the front in the | |
48 | * connector list | |
49 | * @dev: drm device to operate on | |
50 | * | |
51 | * Some userspace presumes that the first connected connector is the main | |
52 | * display, where it's supposed to display e.g. the login screen. For | |
53 | * laptops, this should be the main panel. Use this function to sort all | |
54 | * (eDP/LVDS) panels to the front of the connector list, instead of | |
55 | * painstakingly trying to initialize them in the right order. | |
56 | */ | |
cfc1a062 DV |
57 | void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) |
58 | { | |
59 | struct drm_connector *connector, *tmp; | |
60 | struct list_head panel_list; | |
61 | ||
62 | INIT_LIST_HEAD(&panel_list); | |
63 | ||
64 | list_for_each_entry_safe(connector, tmp, | |
65 | &dev->mode_config.connector_list, head) { | |
66 | if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || | |
67 | connector->connector_type == DRM_MODE_CONNECTOR_eDP) | |
68 | list_move_tail(&connector->head, &panel_list); | |
69 | } | |
70 | ||
71 | list_splice(&panel_list, &dev->mode_config.connector_list); | |
72 | } | |
73 | EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); | |
74 | ||
c9fb15f6 KP |
75 | /** |
76 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
77 | * @encoder: encoder to check | |
78 | * | |
3fcc42e0 DV |
79 | * Checks whether @encoder is with the current mode setting output configuration |
80 | * in use by any connector. This doesn't mean that it is actually enabled since | |
81 | * the DPMS state is tracked separately. | |
c9fb15f6 | 82 | * |
3fcc42e0 DV |
83 | * Returns: |
84 | * True if @encoder is used, false otherwise. | |
c9fb15f6 KP |
85 | */ |
86 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
87 | { | |
88 | struct drm_connector *connector; | |
89 | struct drm_device *dev = encoder->dev; | |
62ff94a5 DV |
90 | |
91 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
c9fb15f6 KP |
92 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
93 | if (connector->encoder == encoder) | |
94 | return true; | |
95 | return false; | |
96 | } | |
97 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
98 | ||
f453ba04 DA |
99 | /** |
100 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
101 | * @crtc: CRTC to check | |
102 | * | |
3fcc42e0 DV |
103 | * Checks whether @crtc is with the current mode setting output configuration |
104 | * in use by any connector. This doesn't mean that it is actually enabled since | |
105 | * the DPMS state is tracked separately. | |
f453ba04 | 106 | * |
3fcc42e0 DV |
107 | * Returns: |
108 | * True if @crtc is used, false otherwise. | |
f453ba04 DA |
109 | */ |
110 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
111 | { | |
112 | struct drm_encoder *encoder; | |
113 | struct drm_device *dev = crtc->dev; | |
62ff94a5 DV |
114 | |
115 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
f453ba04 | 116 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
c9fb15f6 | 117 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
118 | return true; |
119 | return false; | |
120 | } | |
121 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
122 | ||
86a1b9d1 BS |
123 | static void |
124 | drm_encoder_disable(struct drm_encoder *encoder) | |
125 | { | |
126 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
127 | ||
3b336ec4 SP |
128 | if (encoder->bridge) |
129 | encoder->bridge->funcs->disable(encoder->bridge); | |
130 | ||
86a1b9d1 BS |
131 | if (encoder_funcs->disable) |
132 | (*encoder_funcs->disable)(encoder); | |
133 | else | |
134 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
3b336ec4 SP |
135 | |
136 | if (encoder->bridge) | |
137 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
86a1b9d1 BS |
138 | } |
139 | ||
b182cc59 | 140 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
f453ba04 DA |
141 | { |
142 | struct drm_encoder *encoder; | |
a3a0544b | 143 | struct drm_connector *connector; |
f453ba04 DA |
144 | struct drm_crtc *crtc; |
145 | ||
62ff94a5 DV |
146 | drm_warn_on_modeset_not_all_locked(dev); |
147 | ||
a3a0544b DA |
148 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
149 | if (!connector->encoder) | |
150 | continue; | |
a3a0544b DA |
151 | } |
152 | ||
f453ba04 | 153 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
92971021 | 154 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 155 | drm_encoder_disable(encoder); |
9c552dd7 DA |
156 | /* disconnector encoder from any connector */ |
157 | encoder->crtc = NULL; | |
a3a0544b | 158 | } |
f453ba04 DA |
159 | } |
160 | ||
161 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
162 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
163 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
164 | if (!crtc->enabled) { | |
5c8d7171 AD |
165 | if (crtc_funcs->disable) |
166 | (*crtc_funcs->disable)(crtc); | |
167 | else | |
168 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f4510a27 | 169 | crtc->primary->fb = NULL; |
f453ba04 DA |
170 | } |
171 | } | |
172 | } | |
b182cc59 DV |
173 | |
174 | /** | |
175 | * drm_helper_disable_unused_functions - disable unused objects | |
176 | * @dev: DRM device | |
177 | * | |
178 | * This function walks through the entire mode setting configuration of @dev. It | |
179 | * will remove any crtc links of unused encoders and encoder links of | |
180 | * disconnected connectors. Then it will disable all unused encoders and crtcs | |
181 | * either by calling their disable callback if available or by calling their | |
182 | * dpms callback with DRM_MODE_DPMS_OFF. | |
183 | */ | |
184 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
185 | { | |
186 | drm_modeset_lock_all(dev); | |
187 | __drm_helper_disable_unused_functions(dev); | |
188 | drm_modeset_unlock_all(dev); | |
189 | } | |
f453ba04 DA |
190 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
191 | ||
7bec756c JB |
192 | /* |
193 | * Check the CRTC we're going to map each output to vs. its current | |
194 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
195 | * since the driver will have to re-route things. | |
196 | */ | |
197 | static void | |
198 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
199 | { | |
200 | struct drm_encoder_helper_funcs *encoder_funcs; | |
201 | struct drm_encoder *encoder; | |
202 | ||
203 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
204 | encoder_funcs = encoder->helper_private; | |
205 | /* Disable unused encoders */ | |
206 | if (encoder->crtc == NULL) | |
86a1b9d1 | 207 | drm_encoder_disable(encoder); |
7bec756c JB |
208 | /* Disable encoders whose CRTC is about to change */ |
209 | if (encoder_funcs->get_crtc && | |
210 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 211 | drm_encoder_disable(encoder); |
7bec756c JB |
212 | } |
213 | } | |
214 | ||
f453ba04 | 215 | /** |
0d4ed4c8 | 216 | * drm_crtc_helper_set_mode - internal helper to set a mode |
f453ba04 DA |
217 | * @crtc: CRTC to program |
218 | * @mode: mode to use | |
4c9287c6 AD |
219 | * @x: horizontal offset into the surface |
220 | * @y: vertical offset into the surface | |
0d4ed4c8 | 221 | * @old_fb: old framebuffer, for cleanup |
f453ba04 | 222 | * |
f453ba04 | 223 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
0d4ed4c8 DV |
224 | * to fixup or reject the mode prior to trying to set it. This is an internal |
225 | * helper that drivers could e.g. use to update properties that require the | |
226 | * entire output pipe to be disabled and re-enabled in a new configuration. For | |
227 | * example for changing whether audio is enabled on a hdmi link or for changing | |
228 | * panel fitter or dither attributes. It is also called by the | |
229 | * drm_crtc_helper_set_config() helper function to drive the mode setting | |
230 | * sequence. | |
f453ba04 | 231 | * |
3fcc42e0 DV |
232 | * Returns: |
233 | * True if the mode was set successfully, false otherwise. | |
f453ba04 DA |
234 | */ |
235 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
236 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
237 | int x, int y, |
238 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
239 | { |
240 | struct drm_device *dev = crtc->dev; | |
7e99acdc | 241 | struct drm_display_mode *adjusted_mode, saved_mode; |
f453ba04 DA |
242 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
243 | struct drm_encoder_helper_funcs *encoder_funcs; | |
244 | int saved_x, saved_y; | |
7e99acdc | 245 | bool saved_enabled; |
f453ba04 DA |
246 | struct drm_encoder *encoder; |
247 | bool ret = true; | |
248 | ||
62ff94a5 DV |
249 | drm_warn_on_modeset_not_all_locked(dev); |
250 | ||
7e99acdc | 251 | saved_enabled = crtc->enabled; |
f453ba04 | 252 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
f453ba04 DA |
253 | if (!crtc->enabled) |
254 | return true; | |
255 | ||
021a8455 | 256 | adjusted_mode = drm_mode_duplicate(dev, mode); |
7e99acdc IH |
257 | if (!adjusted_mode) { |
258 | crtc->enabled = saved_enabled; | |
6bfc56aa | 259 | return false; |
7e99acdc | 260 | } |
021a8455 | 261 | |
f453ba04 DA |
262 | saved_mode = crtc->mode; |
263 | saved_x = crtc->x; | |
264 | saved_y = crtc->y; | |
265 | ||
266 | /* Update crtc values up front so the driver can rely on them for mode | |
267 | * setting. | |
268 | */ | |
269 | crtc->mode = *mode; | |
270 | crtc->x = x; | |
271 | crtc->y = y; | |
272 | ||
f453ba04 DA |
273 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
274 | * adjust it according to limitations or connector properties, and also | |
275 | * a chance to reject the mode entirely. | |
276 | */ | |
277 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
278 | ||
279 | if (encoder->crtc != crtc) | |
280 | continue; | |
3b336ec4 SP |
281 | |
282 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { | |
283 | ret = encoder->bridge->funcs->mode_fixup( | |
284 | encoder->bridge, mode, adjusted_mode); | |
285 | if (!ret) { | |
286 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
287 | goto done; | |
288 | } | |
289 | } | |
290 | ||
f453ba04 DA |
291 | encoder_funcs = encoder->helper_private; |
292 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
293 | adjusted_mode))) { | |
836e53d7 | 294 | DRM_DEBUG_KMS("Encoder fixup failed\n"); |
f453ba04 DA |
295 | goto done; |
296 | } | |
297 | } | |
298 | ||
299 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { | |
836e53d7 | 300 | DRM_DEBUG_KMS("CRTC fixup failed\n"); |
f453ba04 DA |
301 | goto done; |
302 | } | |
9440106b | 303 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
f453ba04 DA |
304 | |
305 | /* Prepare the encoders and CRTCs before setting the mode. */ | |
306 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
307 | ||
308 | if (encoder->crtc != crtc) | |
309 | continue; | |
3b336ec4 SP |
310 | |
311 | if (encoder->bridge) | |
312 | encoder->bridge->funcs->disable(encoder->bridge); | |
313 | ||
f453ba04 DA |
314 | encoder_funcs = encoder->helper_private; |
315 | /* Disable the encoders as the first thing we do. */ | |
316 | encoder_funcs->prepare(encoder); | |
3b336ec4 SP |
317 | |
318 | if (encoder->bridge) | |
319 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
f453ba04 DA |
320 | } |
321 | ||
7bec756c JB |
322 | drm_crtc_prepare_encoders(dev); |
323 | ||
f453ba04 DA |
324 | crtc_funcs->prepare(crtc); |
325 | ||
326 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
327 | * on the DPLL. | |
328 | */ | |
5c3b82e2 CW |
329 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
330 | if (!ret) | |
331 | goto done; | |
f453ba04 DA |
332 | |
333 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
334 | ||
335 | if (encoder->crtc != crtc) | |
336 | continue; | |
337 | ||
9440106b JG |
338 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
339 | encoder->base.id, drm_get_encoder_name(encoder), | |
340 | mode->base.id, mode->name); | |
f453ba04 DA |
341 | encoder_funcs = encoder->helper_private; |
342 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
3b336ec4 SP |
343 | |
344 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
345 | encoder->bridge->funcs->mode_set(encoder->bridge, mode, | |
346 | adjusted_mode); | |
f453ba04 DA |
347 | } |
348 | ||
349 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
350 | crtc_funcs->commit(crtc); | |
351 | ||
352 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
353 | ||
354 | if (encoder->crtc != crtc) | |
355 | continue; | |
356 | ||
3b336ec4 SP |
357 | if (encoder->bridge) |
358 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
359 | ||
f453ba04 DA |
360 | encoder_funcs = encoder->helper_private; |
361 | encoder_funcs->commit(encoder); | |
362 | ||
3b336ec4 SP |
363 | if (encoder->bridge) |
364 | encoder->bridge->funcs->enable(encoder->bridge); | |
f453ba04 DA |
365 | } |
366 | ||
27641c3f MK |
367 | /* Store real post-adjustment hardware mode. */ |
368 | crtc->hwmode = *adjusted_mode; | |
369 | ||
370 | /* Calculate and store various constants which | |
371 | * are later needed by vblank and swap-completion | |
372 | * timestamping. They are derived from true hwmode. | |
373 | */ | |
545cdd55 | 374 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
27641c3f | 375 | |
f453ba04 DA |
376 | /* FIXME: add subpixel order */ |
377 | done: | |
021a8455 | 378 | drm_mode_destroy(dev, adjusted_mode); |
f453ba04 | 379 | if (!ret) { |
7e99acdc | 380 | crtc->enabled = saved_enabled; |
f453ba04 DA |
381 | crtc->mode = saved_mode; |
382 | crtc->x = saved_x; | |
383 | crtc->y = saved_y; | |
384 | } | |
385 | ||
386 | return ret; | |
387 | } | |
388 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
389 | ||
390 | ||
6eebd6bb CW |
391 | static int |
392 | drm_crtc_helper_disable(struct drm_crtc *crtc) | |
393 | { | |
394 | struct drm_device *dev = crtc->dev; | |
395 | struct drm_connector *connector; | |
396 | struct drm_encoder *encoder; | |
397 | ||
398 | /* Decouple all encoders and their attached connectors from this crtc */ | |
399 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
400 | if (encoder->crtc != crtc) | |
401 | continue; | |
402 | ||
403 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
404 | if (connector->encoder != encoder) | |
405 | continue; | |
406 | ||
407 | connector->encoder = NULL; | |
a6ad6230 TR |
408 | |
409 | /* | |
410 | * drm_helper_disable_unused_functions() ought to be | |
411 | * doing this, but since we've decoupled the encoder | |
412 | * from the connector above, the required connection | |
413 | * between them is henceforth no longer available. | |
414 | */ | |
415 | connector->dpms = DRM_MODE_DPMS_OFF; | |
6eebd6bb CW |
416 | } |
417 | } | |
418 | ||
b182cc59 | 419 | __drm_helper_disable_unused_functions(dev); |
6eebd6bb CW |
420 | return 0; |
421 | } | |
422 | ||
f453ba04 DA |
423 | /** |
424 | * drm_crtc_helper_set_config - set a new config from userspace | |
0d4ed4c8 | 425 | * @set: mode set configuration |
f453ba04 | 426 | * |
0d4ed4c8 | 427 | * Setup a new configuration, provided by the upper layers (either an ioctl call |
e227867f | 428 | * from userspace or internally e.g. from the fbdev support code) in @set, and |
0d4ed4c8 DV |
429 | * enable it. This is the main helper functions for drivers that implement |
430 | * kernel mode setting with the crtc helper functions and the assorted | |
431 | * ->prepare(), ->modeset() and ->commit() helper callbacks. | |
f453ba04 | 432 | * |
3fcc42e0 DV |
433 | * Returns: |
434 | * Returns 0 on success, negative errno numbers on failure. | |
f453ba04 DA |
435 | */ |
436 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
437 | { | |
438 | struct drm_device *dev; | |
02ee4e94 | 439 | struct drm_crtc *new_crtc; |
e67aae79 | 440 | struct drm_encoder *save_encoders, *new_encoder, *encoder; |
4cb72b17 JB |
441 | bool mode_changed = false; /* if true do a full mode set */ |
442 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
e67aae79 | 443 | struct drm_connector *save_connectors, *connector; |
f453ba04 DA |
444 | int count = 0, ro, fail = 0; |
445 | struct drm_crtc_helper_funcs *crtc_funcs; | |
c5006cfe | 446 | struct drm_mode_set save_set; |
4a1b0714 | 447 | int ret; |
bf9dc102 | 448 | int i; |
f453ba04 | 449 | |
58367ed6 | 450 | DRM_DEBUG_KMS("\n"); |
f453ba04 | 451 | |
e58de880 DV |
452 | BUG_ON(!set); |
453 | BUG_ON(!set->crtc); | |
454 | BUG_ON(!set->crtc->helper_private); | |
f453ba04 | 455 | |
e58de880 DV |
456 | /* Enforce sane interface api - has been abused by the fb helper. */ |
457 | BUG_ON(!set->mode && set->fb); | |
458 | BUG_ON(set->fb && set->num_connectors == 0); | |
f453ba04 DA |
459 | |
460 | crtc_funcs = set->crtc->helper_private; | |
461 | ||
ede3ff52 CW |
462 | if (!set->mode) |
463 | set->fb = NULL; | |
464 | ||
9440106b JG |
465 | if (set->fb) { |
466 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", | |
467 | set->crtc->base.id, set->fb->base.id, | |
468 | (int)set->num_connectors, set->x, set->y); | |
469 | } else { | |
ede3ff52 | 470 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); |
6eebd6bb | 471 | return drm_crtc_helper_disable(set->crtc); |
9440106b | 472 | } |
f453ba04 DA |
473 | |
474 | dev = set->crtc->dev; | |
475 | ||
62ff94a5 DV |
476 | drm_warn_on_modeset_not_all_locked(dev); |
477 | ||
02ee4e94 IH |
478 | /* |
479 | * Allocate space for the backup of all (non-pointer) encoder and | |
480 | * connector data. | |
481 | */ | |
e67aae79 MM |
482 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
483 | sizeof(struct drm_encoder), GFP_KERNEL); | |
02ee4e94 | 484 | if (!save_encoders) |
f453ba04 | 485 | return -ENOMEM; |
f453ba04 | 486 | |
e67aae79 MM |
487 | save_connectors = kzalloc(dev->mode_config.num_connector * |
488 | sizeof(struct drm_connector), GFP_KERNEL); | |
489 | if (!save_connectors) { | |
e67aae79 MM |
490 | kfree(save_encoders); |
491 | return -ENOMEM; | |
492 | } | |
493 | ||
02ee4e94 IH |
494 | /* |
495 | * Copy data. Note that driver private data is not affected. | |
e67aae79 MM |
496 | * Should anything bad happen only the expected state is |
497 | * restored, not the drivers personal bookkeeping. | |
498 | */ | |
e67aae79 MM |
499 | count = 0; |
500 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
501 | save_encoders[count++] = *encoder; | |
502 | } | |
503 | ||
504 | count = 0; | |
505 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
506 | save_connectors[count++] = *connector; | |
507 | } | |
508 | ||
c5006cfe JB |
509 | save_set.crtc = set->crtc; |
510 | save_set.mode = &set->crtc->mode; | |
511 | save_set.x = set->crtc->x; | |
512 | save_set.y = set->crtc->y; | |
f4510a27 | 513 | save_set.fb = set->crtc->primary->fb; |
c5006cfe | 514 | |
f453ba04 DA |
515 | /* We should be able to check here if the fb has the same properties |
516 | * and then just flip_or_move it */ | |
f4510a27 | 517 | if (set->crtc->primary->fb != set->fb) { |
712531bf | 518 | /* If we have no fb then treat it as a full mode set */ |
f4510a27 | 519 | if (set->crtc->primary->fb == NULL) { |
58367ed6 | 520 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 521 | mode_changed = true; |
4cb72b17 JB |
522 | } else if (set->fb == NULL) { |
523 | mode_changed = true; | |
ce83adf7 | 524 | } else if (set->fb->pixel_format != |
f4510a27 | 525 | set->crtc->primary->fb->pixel_format) { |
ce83adf7 | 526 | mode_changed = true; |
8dff4742 | 527 | } else |
712531bf | 528 | fb_changed = true; |
f453ba04 DA |
529 | } |
530 | ||
531 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 532 | fb_changed = true; |
f453ba04 DA |
533 | |
534 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { | |
58367ed6 | 535 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
536 | drm_mode_debug_printmodeline(&set->crtc->mode); |
537 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 538 | mode_changed = true; |
f453ba04 DA |
539 | } |
540 | ||
541 | /* a) traverse passed in connector list and get encoders for them */ | |
542 | count = 0; | |
543 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
544 | struct drm_connector_helper_funcs *connector_funcs = | |
545 | connector->helper_private; | |
f453ba04 DA |
546 | new_encoder = connector->encoder; |
547 | for (ro = 0; ro < set->num_connectors; ro++) { | |
548 | if (set->connectors[ro] == connector) { | |
549 | new_encoder = connector_funcs->best_encoder(connector); | |
550 | /* if we can't get an encoder for a connector | |
551 | we are setting now - then fail */ | |
552 | if (new_encoder == NULL) | |
553 | /* don't break so fail path works correct */ | |
554 | fail = 1; | |
25f397a4 DV |
555 | |
556 | if (connector->dpms != DRM_MODE_DPMS_ON) { | |
557 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); | |
558 | mode_changed = true; | |
559 | } | |
177cf92d DV |
560 | |
561 | break; | |
f453ba04 DA |
562 | } |
563 | } | |
564 | ||
565 | if (new_encoder != connector->encoder) { | |
58367ed6 | 566 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 567 | mode_changed = true; |
ff846ab7 MM |
568 | /* If the encoder is reused for another connector, then |
569 | * the appropriate crtc will be set later. | |
570 | */ | |
ff6fdbed MM |
571 | if (connector->encoder) |
572 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
573 | connector->encoder = new_encoder; |
574 | } | |
575 | } | |
576 | ||
577 | if (fail) { | |
578 | ret = -EINVAL; | |
e67aae79 | 579 | goto fail; |
f453ba04 DA |
580 | } |
581 | ||
582 | count = 0; | |
583 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
584 | if (!connector->encoder) | |
585 | continue; | |
586 | ||
f453ba04 DA |
587 | if (connector->encoder->crtc == set->crtc) |
588 | new_crtc = NULL; | |
589 | else | |
590 | new_crtc = connector->encoder->crtc; | |
591 | ||
592 | for (ro = 0; ro < set->num_connectors; ro++) { | |
593 | if (set->connectors[ro] == connector) | |
594 | new_crtc = set->crtc; | |
595 | } | |
7bec756c JB |
596 | |
597 | /* Make sure the new CRTC will work with the encoder */ | |
598 | if (new_crtc && | |
599 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
600 | ret = -EINVAL; | |
e67aae79 | 601 | goto fail; |
7bec756c | 602 | } |
f453ba04 | 603 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 604 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 605 | mode_changed = true; |
f453ba04 DA |
606 | connector->encoder->crtc = new_crtc; |
607 | } | |
9440106b JG |
608 | if (new_crtc) { |
609 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", | |
610 | connector->base.id, drm_get_connector_name(connector), | |
611 | new_crtc->base.id); | |
612 | } else { | |
613 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
614 | connector->base.id, drm_get_connector_name(connector)); | |
615 | } | |
f453ba04 DA |
616 | } |
617 | ||
618 | /* mode_set_base is not a required function */ | |
712531bf JB |
619 | if (fb_changed && !crtc_funcs->mode_set_base) |
620 | mode_changed = true; | |
f453ba04 | 621 | |
712531bf | 622 | if (mode_changed) { |
48b1f5dd | 623 | if (drm_helper_crtc_in_use(set->crtc)) { |
58367ed6 ZY |
624 | DRM_DEBUG_KMS("attempting to set mode from" |
625 | " userspace\n"); | |
f453ba04 | 626 | drm_mode_debug_printmodeline(set->mode); |
f4510a27 | 627 | set->crtc->primary->fb = set->fb; |
f453ba04 | 628 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
3c4fdcfb | 629 | set->x, set->y, |
bec2eac3 | 630 | save_set.fb)) { |
9440106b JG |
631 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
632 | set->crtc->base.id); | |
f4510a27 | 633 | set->crtc->primary->fb = save_set.fb; |
f453ba04 | 634 | ret = -EINVAL; |
e67aae79 | 635 | goto fail; |
f453ba04 | 636 | } |
25f397a4 DV |
637 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
638 | for (i = 0; i < set->num_connectors; i++) { | |
639 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, | |
640 | drm_get_connector_name(set->connectors[i])); | |
641 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); | |
642 | } | |
f453ba04 | 643 | } |
b182cc59 | 644 | __drm_helper_disable_unused_functions(dev); |
712531bf | 645 | } else if (fb_changed) { |
9b1596af BS |
646 | set->crtc->x = set->x; |
647 | set->crtc->y = set->y; | |
f4510a27 | 648 | set->crtc->primary->fb = set->fb; |
5c3b82e2 | 649 | ret = crtc_funcs->mode_set_base(set->crtc, |
bec2eac3 | 650 | set->x, set->y, save_set.fb); |
0ba41e44 | 651 | if (ret != 0) { |
fbce4064 IH |
652 | set->crtc->x = save_set.x; |
653 | set->crtc->y = save_set.y; | |
f4510a27 | 654 | set->crtc->primary->fb = save_set.fb; |
e67aae79 | 655 | goto fail; |
0ba41e44 | 656 | } |
f453ba04 DA |
657 | } |
658 | ||
e67aae79 | 659 | kfree(save_connectors); |
f453ba04 | 660 | kfree(save_encoders); |
f453ba04 DA |
661 | return 0; |
662 | ||
e67aae79 MM |
663 | fail: |
664 | /* Restore all previous data. */ | |
e67aae79 MM |
665 | count = 0; |
666 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
667 | *encoder = save_encoders[count++]; | |
e62fb64e | 668 | } |
e67aae79 | 669 | |
f453ba04 DA |
670 | count = 0; |
671 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
e67aae79 | 672 | *connector = save_connectors[count++]; |
f453ba04 | 673 | } |
e67aae79 | 674 | |
c5006cfe JB |
675 | /* Try to restore the config */ |
676 | if (mode_changed && | |
677 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, | |
678 | save_set.y, save_set.fb)) | |
679 | DRM_ERROR("failed to restore config after modeset failure\n"); | |
680 | ||
e67aae79 | 681 | kfree(save_connectors); |
f453ba04 DA |
682 | kfree(save_encoders); |
683 | return ret; | |
684 | } | |
685 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
686 | ||
c9fb15f6 KP |
687 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
688 | { | |
689 | int dpms = DRM_MODE_DPMS_OFF; | |
690 | struct drm_connector *connector; | |
691 | struct drm_device *dev = encoder->dev; | |
692 | ||
693 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
694 | if (connector->encoder == encoder) | |
695 | if (connector->dpms < dpms) | |
696 | dpms = connector->dpms; | |
697 | return dpms; | |
698 | } | |
699 | ||
3b336ec4 SP |
700 | /* Helper which handles bridge ordering around encoder dpms */ |
701 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) | |
702 | { | |
703 | struct drm_bridge *bridge = encoder->bridge; | |
704 | struct drm_encoder_helper_funcs *encoder_funcs; | |
705 | ||
706 | if (bridge) { | |
707 | if (mode == DRM_MODE_DPMS_ON) | |
708 | bridge->funcs->pre_enable(bridge); | |
709 | else | |
710 | bridge->funcs->disable(bridge); | |
711 | } | |
712 | ||
713 | encoder_funcs = encoder->helper_private; | |
714 | if (encoder_funcs->dpms) | |
715 | encoder_funcs->dpms(encoder, mode); | |
716 | ||
717 | if (bridge) { | |
718 | if (mode == DRM_MODE_DPMS_ON) | |
719 | bridge->funcs->enable(bridge); | |
720 | else | |
721 | bridge->funcs->post_disable(bridge); | |
722 | } | |
723 | } | |
724 | ||
c9fb15f6 KP |
725 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
726 | { | |
727 | int dpms = DRM_MODE_DPMS_OFF; | |
728 | struct drm_connector *connector; | |
729 | struct drm_device *dev = crtc->dev; | |
730 | ||
731 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
732 | if (connector->encoder && connector->encoder->crtc == crtc) | |
733 | if (connector->dpms < dpms) | |
734 | dpms = connector->dpms; | |
735 | return dpms; | |
736 | } | |
737 | ||
738 | /** | |
0d4ed4c8 DV |
739 | * drm_helper_connector_dpms() - connector dpms helper implementation |
740 | * @connector: affected connector | |
741 | * @mode: DPMS mode | |
c9fb15f6 | 742 | * |
0d4ed4c8 DV |
743 | * This is the main helper function provided by the crtc helper framework for |
744 | * implementing the DPMS connector attribute. It computes the new desired DPMS | |
745 | * state for all encoders and crtcs in the output mesh and calls the ->dpms() | |
746 | * callback provided by the driver appropriately. | |
c9fb15f6 KP |
747 | */ |
748 | void drm_helper_connector_dpms(struct drm_connector *connector, int mode) | |
749 | { | |
750 | struct drm_encoder *encoder = connector->encoder; | |
751 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
3b336ec4 | 752 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
c9fb15f6 KP |
753 | |
754 | if (mode == connector->dpms) | |
755 | return; | |
756 | ||
757 | old_dpms = connector->dpms; | |
758 | connector->dpms = mode; | |
759 | ||
3b336ec4 SP |
760 | if (encoder) |
761 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); | |
762 | ||
c9fb15f6 KP |
763 | /* from off to on, do crtc then encoder */ |
764 | if (mode < old_dpms) { | |
765 | if (crtc) { | |
766 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
767 | if (crtc_funcs->dpms) | |
768 | (*crtc_funcs->dpms) (crtc, | |
769 | drm_helper_choose_crtc_dpms(crtc)); | |
770 | } | |
3b336ec4 SP |
771 | if (encoder) |
772 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
773 | } |
774 | ||
775 | /* from on to off, do encoder then crtc */ | |
776 | if (mode > old_dpms) { | |
3b336ec4 SP |
777 | if (encoder) |
778 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
779 | if (crtc) { |
780 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
781 | if (crtc_funcs->dpms) | |
782 | (*crtc_funcs->dpms) (crtc, | |
783 | drm_helper_choose_crtc_dpms(crtc)); | |
784 | } | |
785 | } | |
786 | ||
787 | return; | |
788 | } | |
789 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
790 | ||
3fcc42e0 DV |
791 | /** |
792 | * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata | |
793 | * @fb: drm_framebuffer object to fill out | |
794 | * @mode_cmd: metadata from the userspace fb creation request | |
795 | * | |
796 | * This helper can be used in a drivers fb_create callback to pre-fill the fb's | |
797 | * metadata fields. | |
798 | */ | |
9fd93784 DV |
799 | void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
800 | struct drm_mode_fb_cmd2 *mode_cmd) | |
f453ba04 | 801 | { |
01f2c773 VS |
802 | int i; |
803 | ||
f453ba04 DA |
804 | fb->width = mode_cmd->width; |
805 | fb->height = mode_cmd->height; | |
01f2c773 VS |
806 | for (i = 0; i < 4; i++) { |
807 | fb->pitches[i] = mode_cmd->pitches[i]; | |
808 | fb->offsets[i] = mode_cmd->offsets[i]; | |
809 | } | |
248dbc23 | 810 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
308e5bcb JB |
811 | &fb->bits_per_pixel); |
812 | fb->pixel_format = mode_cmd->pixel_format; | |
f453ba04 DA |
813 | } |
814 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
815 | ||
aa4cd910 DV |
816 | /** |
817 | * drm_helper_resume_force_mode - force-restore mode setting configuration | |
818 | * @dev: drm_device which should be restored | |
819 | * | |
820 | * Drivers which use the mode setting helpers can use this function to | |
821 | * force-restore the mode setting configuration e.g. on resume or when something | |
822 | * else might have trampled over the hw state (like some overzealous old BIOSen | |
823 | * tended to do). | |
00d762cb DV |
824 | * |
825 | * This helper doesn't provide a error return value since restoring the old | |
826 | * config should never fail due to resource allocation issues since the driver | |
827 | * has successfully set the restored configuration already. Hence this should | |
828 | * boil down to the equivalent of a few dpms on calls, which also don't provide | |
829 | * an error code. | |
830 | * | |
831 | * Drivers where simply restoring an old configuration again might fail (e.g. | |
832 | * due to slight differences in allocating shared resources when the | |
833 | * configuration is restored in a different order than when userspace set it up) | |
834 | * need to use their own restore logic. | |
aa4cd910 | 835 | */ |
00d762cb | 836 | void drm_helper_resume_force_mode(struct drm_device *dev) |
f453ba04 DA |
837 | { |
838 | struct drm_crtc *crtc; | |
89347bb8 | 839 | struct drm_encoder *encoder; |
89347bb8 | 840 | struct drm_crtc_helper_funcs *crtc_funcs; |
00d762cb DV |
841 | int encoder_dpms; |
842 | bool ret; | |
f453ba04 | 843 | |
3ea87855 | 844 | drm_modeset_lock_all(dev); |
f453ba04 DA |
845 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
846 | ||
847 | if (!crtc->enabled) | |
848 | continue; | |
849 | ||
3c4fdcfb | 850 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
f4510a27 | 851 | crtc->x, crtc->y, crtc->primary->fb); |
f453ba04 | 852 | |
00d762cb | 853 | /* Restoring the old config should never fail! */ |
f453ba04 DA |
854 | if (ret == false) |
855 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
856 | |
857 | /* Turn off outputs that were already powered off */ | |
858 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
859 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
860 | ||
861 | if(encoder->crtc != crtc) | |
862 | continue; | |
863 | ||
3b336ec4 SP |
864 | encoder_dpms = drm_helper_choose_encoder_dpms( |
865 | encoder); | |
866 | ||
867 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
89347bb8 | 868 | } |
817e631e CW |
869 | |
870 | crtc_funcs = crtc->helper_private; | |
871 | if (crtc_funcs->dpms) | |
872 | (*crtc_funcs->dpms) (crtc, | |
873 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 874 | } |
f453ba04 | 875 | } |
00d762cb | 876 | |
af4fcb57 | 877 | /* disable the unused connectors while restoring the modesetting */ |
b182cc59 | 878 | __drm_helper_disable_unused_functions(dev); |
3ea87855 | 879 | drm_modeset_unlock_all(dev); |
f453ba04 DA |
880 | } |
881 | EXPORT_SYMBOL(drm_helper_resume_force_mode); |