Commit | Line | Data |
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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 | * | |
54 | * The driver callbacks are mostly compatible with the atomic modeset helpers, | |
55 | * except for the handling of the primary plane: Atomic helpers require that the | |
56 | * primary plane is implemented as a real standalone plane and not directly tied | |
57 | * to the CRTC state. For easier transition this library provides functions to | |
58 | * implement the old semantics required by the CRTC helpers using the new plane | |
59 | * and atomic helper callbacks. | |
60 | * | |
61 | * Drivers are strongly urged to convert to the atomic helpers (by way of first | |
62 | * converting to the plane helpers). New drivers must not use these functions | |
63 | * but need to implement the atomic interface instead, potentially using the | |
64 | * atomic helpers for that. | |
65 | */ | |
92b6f89f DV |
66 | MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
67 | MODULE_DESCRIPTION("DRM KMS helper"); | |
68 | MODULE_LICENSE("GPL and additional rights"); | |
69 | ||
0d4ed4c8 DV |
70 | /** |
71 | * drm_helper_move_panel_connectors_to_head() - move panels to the front in the | |
72 | * connector list | |
73 | * @dev: drm device to operate on | |
74 | * | |
75 | * Some userspace presumes that the first connected connector is the main | |
76 | * display, where it's supposed to display e.g. the login screen. For | |
77 | * laptops, this should be the main panel. Use this function to sort all | |
78 | * (eDP/LVDS) panels to the front of the connector list, instead of | |
79 | * painstakingly trying to initialize them in the right order. | |
80 | */ | |
cfc1a062 DV |
81 | void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) |
82 | { | |
83 | struct drm_connector *connector, *tmp; | |
84 | struct list_head panel_list; | |
85 | ||
86 | INIT_LIST_HEAD(&panel_list); | |
87 | ||
88 | list_for_each_entry_safe(connector, tmp, | |
89 | &dev->mode_config.connector_list, head) { | |
90 | if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || | |
91 | connector->connector_type == DRM_MODE_CONNECTOR_eDP) | |
92 | list_move_tail(&connector->head, &panel_list); | |
93 | } | |
94 | ||
95 | list_splice(&panel_list, &dev->mode_config.connector_list); | |
96 | } | |
97 | EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); | |
98 | ||
c9fb15f6 KP |
99 | /** |
100 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
101 | * @encoder: encoder to check | |
102 | * | |
3fcc42e0 DV |
103 | * Checks whether @encoder 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. | |
c9fb15f6 | 106 | * |
3fcc42e0 DV |
107 | * Returns: |
108 | * True if @encoder is used, false otherwise. | |
c9fb15f6 KP |
109 | */ |
110 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
111 | { | |
112 | struct drm_connector *connector; | |
113 | struct drm_device *dev = encoder->dev; | |
62ff94a5 | 114 | |
ba6f5826 SA |
115 | /* |
116 | * We can expect this mutex to be locked if we are not panicking. | |
117 | * Locking is currently fubar in the panic handler. | |
118 | */ | |
8d4ad9d4 | 119 | if (!oops_in_progress) { |
ba6f5826 | 120 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
8d4ad9d4 DA |
121 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
122 | } | |
ba6f5826 | 123 | |
c9fb15f6 KP |
124 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
125 | if (connector->encoder == encoder) | |
126 | return true; | |
127 | return false; | |
128 | } | |
129 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
130 | ||
f453ba04 DA |
131 | /** |
132 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
133 | * @crtc: CRTC to check | |
134 | * | |
3fcc42e0 DV |
135 | * Checks whether @crtc is with the current mode setting output configuration |
136 | * in use by any connector. This doesn't mean that it is actually enabled since | |
137 | * the DPMS state is tracked separately. | |
f453ba04 | 138 | * |
3fcc42e0 DV |
139 | * Returns: |
140 | * True if @crtc is used, false otherwise. | |
f453ba04 DA |
141 | */ |
142 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
143 | { | |
144 | struct drm_encoder *encoder; | |
145 | struct drm_device *dev = crtc->dev; | |
62ff94a5 | 146 | |
ba6f5826 SA |
147 | /* |
148 | * We can expect this mutex to be locked if we are not panicking. | |
149 | * Locking is currently fubar in the panic handler. | |
150 | */ | |
151 | if (!oops_in_progress) | |
152 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
153 | ||
f453ba04 | 154 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
c9fb15f6 | 155 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
156 | return true; |
157 | return false; | |
158 | } | |
159 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
160 | ||
86a1b9d1 BS |
161 | static void |
162 | drm_encoder_disable(struct drm_encoder *encoder) | |
163 | { | |
164 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
165 | ||
3b336ec4 SP |
166 | if (encoder->bridge) |
167 | encoder->bridge->funcs->disable(encoder->bridge); | |
168 | ||
86a1b9d1 BS |
169 | if (encoder_funcs->disable) |
170 | (*encoder_funcs->disable)(encoder); | |
171 | else | |
172 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
3b336ec4 SP |
173 | |
174 | if (encoder->bridge) | |
175 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
86a1b9d1 BS |
176 | } |
177 | ||
b182cc59 | 178 | static void __drm_helper_disable_unused_functions(struct drm_device *dev) |
f453ba04 DA |
179 | { |
180 | struct drm_encoder *encoder; | |
f453ba04 DA |
181 | struct drm_crtc *crtc; |
182 | ||
62ff94a5 DV |
183 | drm_warn_on_modeset_not_all_locked(dev); |
184 | ||
f453ba04 | 185 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
92971021 | 186 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 187 | drm_encoder_disable(encoder); |
b5e6c1da | 188 | /* disconnect encoder from any connector */ |
9c552dd7 | 189 | encoder->crtc = NULL; |
a3a0544b | 190 | } |
f453ba04 DA |
191 | } |
192 | ||
193 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
194 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
195 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
196 | if (!crtc->enabled) { | |
5c8d7171 AD |
197 | if (crtc_funcs->disable) |
198 | (*crtc_funcs->disable)(crtc); | |
199 | else | |
200 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f4510a27 | 201 | crtc->primary->fb = NULL; |
f453ba04 DA |
202 | } |
203 | } | |
204 | } | |
b182cc59 DV |
205 | |
206 | /** | |
207 | * drm_helper_disable_unused_functions - disable unused objects | |
208 | * @dev: DRM device | |
209 | * | |
210 | * This function walks through the entire mode setting configuration of @dev. It | |
211 | * will remove any crtc links of unused encoders and encoder links of | |
212 | * disconnected connectors. Then it will disable all unused encoders and crtcs | |
213 | * either by calling their disable callback if available or by calling their | |
214 | * dpms callback with DRM_MODE_DPMS_OFF. | |
215 | */ | |
216 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
217 | { | |
218 | drm_modeset_lock_all(dev); | |
219 | __drm_helper_disable_unused_functions(dev); | |
220 | drm_modeset_unlock_all(dev); | |
221 | } | |
f453ba04 DA |
222 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
223 | ||
7bec756c JB |
224 | /* |
225 | * Check the CRTC we're going to map each output to vs. its current | |
226 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
227 | * since the driver will have to re-route things. | |
228 | */ | |
229 | static void | |
230 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
231 | { | |
232 | struct drm_encoder_helper_funcs *encoder_funcs; | |
233 | struct drm_encoder *encoder; | |
234 | ||
235 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
236 | encoder_funcs = encoder->helper_private; | |
237 | /* Disable unused encoders */ | |
238 | if (encoder->crtc == NULL) | |
86a1b9d1 | 239 | drm_encoder_disable(encoder); |
7bec756c JB |
240 | /* Disable encoders whose CRTC is about to change */ |
241 | if (encoder_funcs->get_crtc && | |
242 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 243 | drm_encoder_disable(encoder); |
7bec756c JB |
244 | } |
245 | } | |
246 | ||
f453ba04 | 247 | /** |
0d4ed4c8 | 248 | * drm_crtc_helper_set_mode - internal helper to set a mode |
f453ba04 DA |
249 | * @crtc: CRTC to program |
250 | * @mode: mode to use | |
4c9287c6 AD |
251 | * @x: horizontal offset into the surface |
252 | * @y: vertical offset into the surface | |
0d4ed4c8 | 253 | * @old_fb: old framebuffer, for cleanup |
f453ba04 | 254 | * |
f453ba04 | 255 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
0d4ed4c8 DV |
256 | * to fixup or reject the mode prior to trying to set it. This is an internal |
257 | * helper that drivers could e.g. use to update properties that require the | |
258 | * entire output pipe to be disabled and re-enabled in a new configuration. For | |
259 | * example for changing whether audio is enabled on a hdmi link or for changing | |
260 | * panel fitter or dither attributes. It is also called by the | |
261 | * drm_crtc_helper_set_config() helper function to drive the mode setting | |
262 | * sequence. | |
f453ba04 | 263 | * |
3fcc42e0 DV |
264 | * Returns: |
265 | * True if the mode was set successfully, false otherwise. | |
f453ba04 DA |
266 | */ |
267 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
268 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
269 | int x, int y, |
270 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
271 | { |
272 | struct drm_device *dev = crtc->dev; | |
7e99acdc | 273 | struct drm_display_mode *adjusted_mode, saved_mode; |
f453ba04 DA |
274 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
275 | struct drm_encoder_helper_funcs *encoder_funcs; | |
276 | int saved_x, saved_y; | |
7e99acdc | 277 | bool saved_enabled; |
f453ba04 DA |
278 | struct drm_encoder *encoder; |
279 | bool ret = true; | |
280 | ||
62ff94a5 DV |
281 | drm_warn_on_modeset_not_all_locked(dev); |
282 | ||
7e99acdc | 283 | saved_enabled = crtc->enabled; |
f453ba04 | 284 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
f453ba04 DA |
285 | if (!crtc->enabled) |
286 | return true; | |
287 | ||
021a8455 | 288 | adjusted_mode = drm_mode_duplicate(dev, mode); |
7e99acdc IH |
289 | if (!adjusted_mode) { |
290 | crtc->enabled = saved_enabled; | |
6bfc56aa | 291 | return false; |
7e99acdc | 292 | } |
021a8455 | 293 | |
f453ba04 DA |
294 | saved_mode = crtc->mode; |
295 | saved_x = crtc->x; | |
296 | saved_y = crtc->y; | |
297 | ||
298 | /* Update crtc values up front so the driver can rely on them for mode | |
299 | * setting. | |
300 | */ | |
301 | crtc->mode = *mode; | |
302 | crtc->x = x; | |
303 | crtc->y = y; | |
304 | ||
f453ba04 DA |
305 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
306 | * adjust it according to limitations or connector properties, and also | |
307 | * a chance to reject the mode entirely. | |
308 | */ | |
309 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
310 | ||
311 | if (encoder->crtc != crtc) | |
312 | continue; | |
3b336ec4 SP |
313 | |
314 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { | |
315 | ret = encoder->bridge->funcs->mode_fixup( | |
316 | encoder->bridge, mode, adjusted_mode); | |
317 | if (!ret) { | |
318 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
319 | goto done; | |
320 | } | |
321 | } | |
322 | ||
f453ba04 DA |
323 | encoder_funcs = encoder->helper_private; |
324 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
325 | adjusted_mode))) { | |
836e53d7 | 326 | DRM_DEBUG_KMS("Encoder fixup failed\n"); |
f453ba04 DA |
327 | goto done; |
328 | } | |
329 | } | |
330 | ||
331 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { | |
836e53d7 | 332 | DRM_DEBUG_KMS("CRTC fixup failed\n"); |
f453ba04 DA |
333 | goto done; |
334 | } | |
9440106b | 335 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
f453ba04 DA |
336 | |
337 | /* Prepare the encoders and CRTCs before setting the mode. */ | |
338 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
339 | ||
340 | if (encoder->crtc != crtc) | |
341 | continue; | |
3b336ec4 SP |
342 | |
343 | if (encoder->bridge) | |
344 | encoder->bridge->funcs->disable(encoder->bridge); | |
345 | ||
f453ba04 DA |
346 | encoder_funcs = encoder->helper_private; |
347 | /* Disable the encoders as the first thing we do. */ | |
348 | encoder_funcs->prepare(encoder); | |
3b336ec4 SP |
349 | |
350 | if (encoder->bridge) | |
351 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
f453ba04 DA |
352 | } |
353 | ||
7bec756c JB |
354 | drm_crtc_prepare_encoders(dev); |
355 | ||
f453ba04 DA |
356 | crtc_funcs->prepare(crtc); |
357 | ||
358 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
359 | * on the DPLL. | |
360 | */ | |
5c3b82e2 CW |
361 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
362 | if (!ret) | |
363 | goto done; | |
f453ba04 DA |
364 | |
365 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
366 | ||
367 | if (encoder->crtc != crtc) | |
368 | continue; | |
369 | ||
9440106b | 370 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
83a8cfd3 | 371 | encoder->base.id, encoder->name, |
9440106b | 372 | mode->base.id, mode->name); |
f453ba04 DA |
373 | encoder_funcs = encoder->helper_private; |
374 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
3b336ec4 SP |
375 | |
376 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
377 | encoder->bridge->funcs->mode_set(encoder->bridge, mode, | |
378 | adjusted_mode); | |
f453ba04 DA |
379 | } |
380 | ||
381 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
382 | crtc_funcs->commit(crtc); | |
383 | ||
384 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
385 | ||
386 | if (encoder->crtc != crtc) | |
387 | continue; | |
388 | ||
3b336ec4 SP |
389 | if (encoder->bridge) |
390 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
391 | ||
f453ba04 DA |
392 | encoder_funcs = encoder->helper_private; |
393 | encoder_funcs->commit(encoder); | |
394 | ||
3b336ec4 SP |
395 | if (encoder->bridge) |
396 | encoder->bridge->funcs->enable(encoder->bridge); | |
f453ba04 DA |
397 | } |
398 | ||
27641c3f MK |
399 | /* Store real post-adjustment hardware mode. */ |
400 | crtc->hwmode = *adjusted_mode; | |
401 | ||
402 | /* Calculate and store various constants which | |
403 | * are later needed by vblank and swap-completion | |
404 | * timestamping. They are derived from true hwmode. | |
405 | */ | |
545cdd55 | 406 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
27641c3f | 407 | |
f453ba04 DA |
408 | /* FIXME: add subpixel order */ |
409 | done: | |
021a8455 | 410 | drm_mode_destroy(dev, adjusted_mode); |
f453ba04 | 411 | if (!ret) { |
7e99acdc | 412 | crtc->enabled = saved_enabled; |
f453ba04 DA |
413 | crtc->mode = saved_mode; |
414 | crtc->x = saved_x; | |
415 | crtc->y = saved_y; | |
416 | } | |
417 | ||
418 | return ret; | |
419 | } | |
420 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
421 | ||
a74591d7 | 422 | static void |
6eebd6bb CW |
423 | drm_crtc_helper_disable(struct drm_crtc *crtc) |
424 | { | |
425 | struct drm_device *dev = crtc->dev; | |
426 | struct drm_connector *connector; | |
427 | struct drm_encoder *encoder; | |
428 | ||
429 | /* Decouple all encoders and their attached connectors from this crtc */ | |
430 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
431 | if (encoder->crtc != crtc) | |
432 | continue; | |
433 | ||
434 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
435 | if (connector->encoder != encoder) | |
436 | continue; | |
437 | ||
438 | connector->encoder = NULL; | |
a6ad6230 TR |
439 | |
440 | /* | |
441 | * drm_helper_disable_unused_functions() ought to be | |
442 | * doing this, but since we've decoupled the encoder | |
443 | * from the connector above, the required connection | |
444 | * between them is henceforth no longer available. | |
445 | */ | |
446 | connector->dpms = DRM_MODE_DPMS_OFF; | |
6eebd6bb CW |
447 | } |
448 | } | |
449 | ||
b182cc59 | 450 | __drm_helper_disable_unused_functions(dev); |
6eebd6bb CW |
451 | } |
452 | ||
f453ba04 DA |
453 | /** |
454 | * drm_crtc_helper_set_config - set a new config from userspace | |
0d4ed4c8 | 455 | * @set: mode set configuration |
f453ba04 | 456 | * |
0d4ed4c8 | 457 | * Setup a new configuration, provided by the upper layers (either an ioctl call |
e227867f | 458 | * from userspace or internally e.g. from the fbdev support code) in @set, and |
0d4ed4c8 DV |
459 | * enable it. This is the main helper functions for drivers that implement |
460 | * kernel mode setting with the crtc helper functions and the assorted | |
461 | * ->prepare(), ->modeset() and ->commit() helper callbacks. | |
f453ba04 | 462 | * |
3fcc42e0 DV |
463 | * Returns: |
464 | * Returns 0 on success, negative errno numbers on failure. | |
f453ba04 DA |
465 | */ |
466 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
467 | { | |
468 | struct drm_device *dev; | |
02ee4e94 | 469 | struct drm_crtc *new_crtc; |
e67aae79 | 470 | struct drm_encoder *save_encoders, *new_encoder, *encoder; |
4cb72b17 JB |
471 | bool mode_changed = false; /* if true do a full mode set */ |
472 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
e67aae79 | 473 | struct drm_connector *save_connectors, *connector; |
f453ba04 DA |
474 | int count = 0, ro, fail = 0; |
475 | struct drm_crtc_helper_funcs *crtc_funcs; | |
c5006cfe | 476 | struct drm_mode_set save_set; |
4a1b0714 | 477 | int ret; |
bf9dc102 | 478 | int i; |
f453ba04 | 479 | |
58367ed6 | 480 | DRM_DEBUG_KMS("\n"); |
f453ba04 | 481 | |
e58de880 DV |
482 | BUG_ON(!set); |
483 | BUG_ON(!set->crtc); | |
484 | BUG_ON(!set->crtc->helper_private); | |
f453ba04 | 485 | |
e58de880 DV |
486 | /* Enforce sane interface api - has been abused by the fb helper. */ |
487 | BUG_ON(!set->mode && set->fb); | |
488 | BUG_ON(set->fb && set->num_connectors == 0); | |
f453ba04 DA |
489 | |
490 | crtc_funcs = set->crtc->helper_private; | |
491 | ||
ede3ff52 CW |
492 | if (!set->mode) |
493 | set->fb = NULL; | |
494 | ||
9440106b JG |
495 | if (set->fb) { |
496 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", | |
497 | set->crtc->base.id, set->fb->base.id, | |
498 | (int)set->num_connectors, set->x, set->y); | |
499 | } else { | |
ede3ff52 | 500 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); |
a74591d7 TR |
501 | drm_crtc_helper_disable(set->crtc); |
502 | return 0; | |
9440106b | 503 | } |
f453ba04 DA |
504 | |
505 | dev = set->crtc->dev; | |
506 | ||
62ff94a5 DV |
507 | drm_warn_on_modeset_not_all_locked(dev); |
508 | ||
02ee4e94 IH |
509 | /* |
510 | * Allocate space for the backup of all (non-pointer) encoder and | |
511 | * connector data. | |
512 | */ | |
e67aae79 MM |
513 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
514 | sizeof(struct drm_encoder), GFP_KERNEL); | |
02ee4e94 | 515 | if (!save_encoders) |
f453ba04 | 516 | return -ENOMEM; |
f453ba04 | 517 | |
e67aae79 MM |
518 | save_connectors = kzalloc(dev->mode_config.num_connector * |
519 | sizeof(struct drm_connector), GFP_KERNEL); | |
520 | if (!save_connectors) { | |
e67aae79 MM |
521 | kfree(save_encoders); |
522 | return -ENOMEM; | |
523 | } | |
524 | ||
02ee4e94 IH |
525 | /* |
526 | * Copy data. Note that driver private data is not affected. | |
e67aae79 MM |
527 | * Should anything bad happen only the expected state is |
528 | * restored, not the drivers personal bookkeeping. | |
529 | */ | |
e67aae79 MM |
530 | count = 0; |
531 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
532 | save_encoders[count++] = *encoder; | |
533 | } | |
534 | ||
535 | count = 0; | |
536 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
537 | save_connectors[count++] = *connector; | |
538 | } | |
539 | ||
c5006cfe JB |
540 | save_set.crtc = set->crtc; |
541 | save_set.mode = &set->crtc->mode; | |
542 | save_set.x = set->crtc->x; | |
543 | save_set.y = set->crtc->y; | |
f4510a27 | 544 | save_set.fb = set->crtc->primary->fb; |
c5006cfe | 545 | |
f453ba04 DA |
546 | /* We should be able to check here if the fb has the same properties |
547 | * and then just flip_or_move it */ | |
f4510a27 | 548 | if (set->crtc->primary->fb != set->fb) { |
712531bf | 549 | /* If we have no fb then treat it as a full mode set */ |
f4510a27 | 550 | if (set->crtc->primary->fb == NULL) { |
58367ed6 | 551 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 552 | mode_changed = true; |
4cb72b17 JB |
553 | } else if (set->fb == NULL) { |
554 | mode_changed = true; | |
ce83adf7 | 555 | } else if (set->fb->pixel_format != |
f4510a27 | 556 | set->crtc->primary->fb->pixel_format) { |
ce83adf7 | 557 | mode_changed = true; |
8dff4742 | 558 | } else |
712531bf | 559 | fb_changed = true; |
f453ba04 DA |
560 | } |
561 | ||
562 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 563 | fb_changed = true; |
f453ba04 DA |
564 | |
565 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { | |
58367ed6 | 566 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
567 | drm_mode_debug_printmodeline(&set->crtc->mode); |
568 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 569 | mode_changed = true; |
f453ba04 DA |
570 | } |
571 | ||
572 | /* a) traverse passed in connector list and get encoders for them */ | |
573 | count = 0; | |
574 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
575 | struct drm_connector_helper_funcs *connector_funcs = | |
576 | connector->helper_private; | |
f453ba04 DA |
577 | new_encoder = connector->encoder; |
578 | for (ro = 0; ro < set->num_connectors; ro++) { | |
579 | if (set->connectors[ro] == connector) { | |
580 | new_encoder = connector_funcs->best_encoder(connector); | |
581 | /* if we can't get an encoder for a connector | |
582 | we are setting now - then fail */ | |
583 | if (new_encoder == NULL) | |
584 | /* don't break so fail path works correct */ | |
585 | fail = 1; | |
25f397a4 DV |
586 | |
587 | if (connector->dpms != DRM_MODE_DPMS_ON) { | |
588 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); | |
589 | mode_changed = true; | |
590 | } | |
177cf92d DV |
591 | |
592 | break; | |
f453ba04 DA |
593 | } |
594 | } | |
595 | ||
596 | if (new_encoder != connector->encoder) { | |
58367ed6 | 597 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 598 | mode_changed = true; |
ff846ab7 MM |
599 | /* If the encoder is reused for another connector, then |
600 | * the appropriate crtc will be set later. | |
601 | */ | |
ff6fdbed MM |
602 | if (connector->encoder) |
603 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
604 | connector->encoder = new_encoder; |
605 | } | |
606 | } | |
607 | ||
608 | if (fail) { | |
609 | ret = -EINVAL; | |
e67aae79 | 610 | goto fail; |
f453ba04 DA |
611 | } |
612 | ||
613 | count = 0; | |
614 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
615 | if (!connector->encoder) | |
616 | continue; | |
617 | ||
f453ba04 DA |
618 | if (connector->encoder->crtc == set->crtc) |
619 | new_crtc = NULL; | |
620 | else | |
621 | new_crtc = connector->encoder->crtc; | |
622 | ||
623 | for (ro = 0; ro < set->num_connectors; ro++) { | |
624 | if (set->connectors[ro] == connector) | |
625 | new_crtc = set->crtc; | |
626 | } | |
7bec756c JB |
627 | |
628 | /* Make sure the new CRTC will work with the encoder */ | |
629 | if (new_crtc && | |
630 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
631 | ret = -EINVAL; | |
e67aae79 | 632 | goto fail; |
7bec756c | 633 | } |
f453ba04 | 634 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 635 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 636 | mode_changed = true; |
f453ba04 DA |
637 | connector->encoder->crtc = new_crtc; |
638 | } | |
9440106b JG |
639 | if (new_crtc) { |
640 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", | |
25933820 | 641 | connector->base.id, connector->name, |
9440106b JG |
642 | new_crtc->base.id); |
643 | } else { | |
644 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
25933820 | 645 | connector->base.id, connector->name); |
9440106b | 646 | } |
f453ba04 DA |
647 | } |
648 | ||
649 | /* mode_set_base is not a required function */ | |
712531bf JB |
650 | if (fb_changed && !crtc_funcs->mode_set_base) |
651 | mode_changed = true; | |
f453ba04 | 652 | |
712531bf | 653 | if (mode_changed) { |
48b1f5dd | 654 | if (drm_helper_crtc_in_use(set->crtc)) { |
58367ed6 ZY |
655 | DRM_DEBUG_KMS("attempting to set mode from" |
656 | " userspace\n"); | |
f453ba04 | 657 | drm_mode_debug_printmodeline(set->mode); |
f4510a27 | 658 | set->crtc->primary->fb = set->fb; |
f453ba04 | 659 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
3c4fdcfb | 660 | set->x, set->y, |
bec2eac3 | 661 | save_set.fb)) { |
9440106b JG |
662 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
663 | set->crtc->base.id); | |
f4510a27 | 664 | set->crtc->primary->fb = save_set.fb; |
f453ba04 | 665 | ret = -EINVAL; |
e67aae79 | 666 | goto fail; |
f453ba04 | 667 | } |
25f397a4 DV |
668 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
669 | for (i = 0; i < set->num_connectors; i++) { | |
670 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, | |
25933820 | 671 | set->connectors[i]->name); |
25f397a4 DV |
672 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); |
673 | } | |
f453ba04 | 674 | } |
b182cc59 | 675 | __drm_helper_disable_unused_functions(dev); |
712531bf | 676 | } else if (fb_changed) { |
9b1596af BS |
677 | set->crtc->x = set->x; |
678 | set->crtc->y = set->y; | |
f4510a27 | 679 | set->crtc->primary->fb = set->fb; |
5c3b82e2 | 680 | ret = crtc_funcs->mode_set_base(set->crtc, |
bec2eac3 | 681 | set->x, set->y, save_set.fb); |
0ba41e44 | 682 | if (ret != 0) { |
fbce4064 IH |
683 | set->crtc->x = save_set.x; |
684 | set->crtc->y = save_set.y; | |
f4510a27 | 685 | set->crtc->primary->fb = save_set.fb; |
e67aae79 | 686 | goto fail; |
0ba41e44 | 687 | } |
f453ba04 DA |
688 | } |
689 | ||
e67aae79 | 690 | kfree(save_connectors); |
f453ba04 | 691 | kfree(save_encoders); |
f453ba04 DA |
692 | return 0; |
693 | ||
e67aae79 MM |
694 | fail: |
695 | /* Restore all previous data. */ | |
e67aae79 MM |
696 | count = 0; |
697 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
698 | *encoder = save_encoders[count++]; | |
e62fb64e | 699 | } |
e67aae79 | 700 | |
f453ba04 DA |
701 | count = 0; |
702 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
e67aae79 | 703 | *connector = save_connectors[count++]; |
f453ba04 | 704 | } |
e67aae79 | 705 | |
c5006cfe JB |
706 | /* Try to restore the config */ |
707 | if (mode_changed && | |
708 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, | |
709 | save_set.y, save_set.fb)) | |
710 | DRM_ERROR("failed to restore config after modeset failure\n"); | |
711 | ||
e67aae79 | 712 | kfree(save_connectors); |
f453ba04 DA |
713 | kfree(save_encoders); |
714 | return ret; | |
715 | } | |
716 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
717 | ||
c9fb15f6 KP |
718 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
719 | { | |
720 | int dpms = DRM_MODE_DPMS_OFF; | |
721 | struct drm_connector *connector; | |
722 | struct drm_device *dev = encoder->dev; | |
723 | ||
724 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
725 | if (connector->encoder == encoder) | |
726 | if (connector->dpms < dpms) | |
727 | dpms = connector->dpms; | |
728 | return dpms; | |
729 | } | |
730 | ||
3b336ec4 SP |
731 | /* Helper which handles bridge ordering around encoder dpms */ |
732 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) | |
733 | { | |
734 | struct drm_bridge *bridge = encoder->bridge; | |
735 | struct drm_encoder_helper_funcs *encoder_funcs; | |
736 | ||
737 | if (bridge) { | |
738 | if (mode == DRM_MODE_DPMS_ON) | |
739 | bridge->funcs->pre_enable(bridge); | |
740 | else | |
741 | bridge->funcs->disable(bridge); | |
742 | } | |
743 | ||
744 | encoder_funcs = encoder->helper_private; | |
745 | if (encoder_funcs->dpms) | |
746 | encoder_funcs->dpms(encoder, mode); | |
747 | ||
748 | if (bridge) { | |
749 | if (mode == DRM_MODE_DPMS_ON) | |
750 | bridge->funcs->enable(bridge); | |
751 | else | |
752 | bridge->funcs->post_disable(bridge); | |
753 | } | |
754 | } | |
755 | ||
c9fb15f6 KP |
756 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
757 | { | |
758 | int dpms = DRM_MODE_DPMS_OFF; | |
759 | struct drm_connector *connector; | |
760 | struct drm_device *dev = crtc->dev; | |
761 | ||
762 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
763 | if (connector->encoder && connector->encoder->crtc == crtc) | |
764 | if (connector->dpms < dpms) | |
765 | dpms = connector->dpms; | |
766 | return dpms; | |
767 | } | |
768 | ||
769 | /** | |
0d4ed4c8 DV |
770 | * drm_helper_connector_dpms() - connector dpms helper implementation |
771 | * @connector: affected connector | |
772 | * @mode: DPMS mode | |
c9fb15f6 | 773 | * |
0d4ed4c8 DV |
774 | * This is the main helper function provided by the crtc helper framework for |
775 | * implementing the DPMS connector attribute. It computes the new desired DPMS | |
776 | * state for all encoders and crtcs in the output mesh and calls the ->dpms() | |
777 | * callback provided by the driver appropriately. | |
c9fb15f6 KP |
778 | */ |
779 | void drm_helper_connector_dpms(struct drm_connector *connector, int mode) | |
780 | { | |
781 | struct drm_encoder *encoder = connector->encoder; | |
782 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
3b336ec4 | 783 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
c9fb15f6 KP |
784 | |
785 | if (mode == connector->dpms) | |
786 | return; | |
787 | ||
788 | old_dpms = connector->dpms; | |
789 | connector->dpms = mode; | |
790 | ||
3b336ec4 SP |
791 | if (encoder) |
792 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); | |
793 | ||
c9fb15f6 KP |
794 | /* from off to on, do crtc then encoder */ |
795 | if (mode < old_dpms) { | |
796 | if (crtc) { | |
797 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
798 | if (crtc_funcs->dpms) | |
799 | (*crtc_funcs->dpms) (crtc, | |
800 | drm_helper_choose_crtc_dpms(crtc)); | |
801 | } | |
3b336ec4 SP |
802 | if (encoder) |
803 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
804 | } |
805 | ||
806 | /* from on to off, do encoder then crtc */ | |
807 | if (mode > old_dpms) { | |
3b336ec4 SP |
808 | if (encoder) |
809 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
810 | if (crtc) { |
811 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
812 | if (crtc_funcs->dpms) | |
813 | (*crtc_funcs->dpms) (crtc, | |
814 | drm_helper_choose_crtc_dpms(crtc)); | |
815 | } | |
816 | } | |
817 | ||
818 | return; | |
819 | } | |
820 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
821 | ||
3fcc42e0 DV |
822 | /** |
823 | * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata | |
824 | * @fb: drm_framebuffer object to fill out | |
825 | * @mode_cmd: metadata from the userspace fb creation request | |
826 | * | |
827 | * This helper can be used in a drivers fb_create callback to pre-fill the fb's | |
828 | * metadata fields. | |
829 | */ | |
9fd93784 DV |
830 | void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
831 | struct drm_mode_fb_cmd2 *mode_cmd) | |
f453ba04 | 832 | { |
01f2c773 VS |
833 | int i; |
834 | ||
f453ba04 DA |
835 | fb->width = mode_cmd->width; |
836 | fb->height = mode_cmd->height; | |
01f2c773 VS |
837 | for (i = 0; i < 4; i++) { |
838 | fb->pitches[i] = mode_cmd->pitches[i]; | |
839 | fb->offsets[i] = mode_cmd->offsets[i]; | |
840 | } | |
248dbc23 | 841 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
308e5bcb JB |
842 | &fb->bits_per_pixel); |
843 | fb->pixel_format = mode_cmd->pixel_format; | |
d980b183 | 844 | fb->flags = mode_cmd->flags; |
f453ba04 DA |
845 | } |
846 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
847 | ||
aa4cd910 DV |
848 | /** |
849 | * drm_helper_resume_force_mode - force-restore mode setting configuration | |
850 | * @dev: drm_device which should be restored | |
851 | * | |
852 | * Drivers which use the mode setting helpers can use this function to | |
853 | * force-restore the mode setting configuration e.g. on resume or when something | |
854 | * else might have trampled over the hw state (like some overzealous old BIOSen | |
855 | * tended to do). | |
00d762cb DV |
856 | * |
857 | * This helper doesn't provide a error return value since restoring the old | |
858 | * config should never fail due to resource allocation issues since the driver | |
859 | * has successfully set the restored configuration already. Hence this should | |
860 | * boil down to the equivalent of a few dpms on calls, which also don't provide | |
861 | * an error code. | |
862 | * | |
863 | * Drivers where simply restoring an old configuration again might fail (e.g. | |
864 | * due to slight differences in allocating shared resources when the | |
865 | * configuration is restored in a different order than when userspace set it up) | |
866 | * need to use their own restore logic. | |
aa4cd910 | 867 | */ |
00d762cb | 868 | void drm_helper_resume_force_mode(struct drm_device *dev) |
f453ba04 DA |
869 | { |
870 | struct drm_crtc *crtc; | |
89347bb8 | 871 | struct drm_encoder *encoder; |
89347bb8 | 872 | struct drm_crtc_helper_funcs *crtc_funcs; |
00d762cb DV |
873 | int encoder_dpms; |
874 | bool ret; | |
f453ba04 | 875 | |
3ea87855 | 876 | drm_modeset_lock_all(dev); |
f453ba04 DA |
877 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
878 | ||
879 | if (!crtc->enabled) | |
880 | continue; | |
881 | ||
3c4fdcfb | 882 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
f4510a27 | 883 | crtc->x, crtc->y, crtc->primary->fb); |
f453ba04 | 884 | |
00d762cb | 885 | /* Restoring the old config should never fail! */ |
f453ba04 DA |
886 | if (ret == false) |
887 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
888 | |
889 | /* Turn off outputs that were already powered off */ | |
890 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
891 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
892 | ||
893 | if(encoder->crtc != crtc) | |
894 | continue; | |
895 | ||
3b336ec4 SP |
896 | encoder_dpms = drm_helper_choose_encoder_dpms( |
897 | encoder); | |
898 | ||
899 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
89347bb8 | 900 | } |
817e631e CW |
901 | |
902 | crtc_funcs = crtc->helper_private; | |
903 | if (crtc_funcs->dpms) | |
904 | (*crtc_funcs->dpms) (crtc, | |
905 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 906 | } |
f453ba04 | 907 | } |
00d762cb | 908 | |
af4fcb57 | 909 | /* disable the unused connectors while restoring the modesetting */ |
b182cc59 | 910 | __drm_helper_disable_unused_functions(dev); |
3ea87855 | 911 | drm_modeset_unlock_all(dev); |
f453ba04 DA |
912 | } |
913 | EXPORT_SYMBOL(drm_helper_resume_force_mode); | |
2f324b42 DV |
914 | |
915 | /** | |
916 | * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers | |
917 | * @crtc: DRM CRTC | |
918 | * @mode: DRM display mode which userspace requested | |
919 | * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks | |
920 | * @x: x offset of the CRTC scanout area on the underlying framebuffer | |
921 | * @y: y offset of the CRTC scanout area on the underlying framebuffer | |
922 | * @old_fb: previous framebuffer | |
923 | * | |
924 | * This function implements a callback useable as the ->mode_set callback | |
925 | * required by the crtc helpers. Besides the atomic plane helper functions for | |
926 | * the primary plane the driver must also provide the ->mode_set_nofb callback | |
927 | * to set up the crtc. | |
928 | * | |
929 | * This is a transitional helper useful for converting drivers to the atomic | |
930 | * interfaces. | |
931 | */ | |
932 | int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
933 | struct drm_display_mode *adjusted_mode, int x, int y, | |
934 | struct drm_framebuffer *old_fb) | |
935 | { | |
936 | struct drm_crtc_state *crtc_state; | |
937 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
938 | int ret; | |
939 | ||
940 | if (crtc->funcs->atomic_duplicate_state) | |
941 | crtc_state = crtc->funcs->atomic_duplicate_state(crtc); | |
942 | else if (crtc->state) | |
943 | crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), | |
944 | GFP_KERNEL); | |
945 | else | |
946 | crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL); | |
947 | if (!crtc_state) | |
948 | return -ENOMEM; | |
07cc0ef6 | 949 | crtc_state->crtc = crtc; |
2f324b42 DV |
950 | |
951 | crtc_state->enable = true; | |
952 | crtc_state->planes_changed = true; | |
623369e5 | 953 | crtc_state->mode_changed = true; |
2f324b42 DV |
954 | drm_mode_copy(&crtc_state->mode, mode); |
955 | drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode); | |
956 | ||
957 | if (crtc_funcs->atomic_check) { | |
958 | ret = crtc_funcs->atomic_check(crtc, crtc_state); | |
959 | if (ret) { | |
960 | kfree(crtc_state); | |
961 | ||
962 | return ret; | |
963 | } | |
964 | } | |
965 | ||
966 | swap(crtc->state, crtc_state); | |
967 | ||
968 | crtc_funcs->mode_set_nofb(crtc); | |
969 | ||
970 | if (crtc_state) { | |
971 | if (crtc->funcs->atomic_destroy_state) | |
972 | crtc->funcs->atomic_destroy_state(crtc, crtc_state); | |
973 | else | |
974 | kfree(crtc_state); | |
975 | } | |
976 | ||
977 | return drm_helper_crtc_mode_set_base(crtc, x, y, old_fb); | |
978 | } | |
979 | EXPORT_SYMBOL(drm_helper_crtc_mode_set); | |
980 | ||
981 | /** | |
982 | * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers | |
983 | * @crtc: DRM CRTC | |
984 | * @x: x offset of the CRTC scanout area on the underlying framebuffer | |
985 | * @y: y offset of the CRTC scanout area on the underlying framebuffer | |
986 | * @old_fb: previous framebuffer | |
987 | * | |
988 | * This function implements a callback useable as the ->mode_set_base used | |
989 | * required by the crtc helpers. The driver must provide the atomic plane helper | |
990 | * functions for the primary plane. | |
991 | * | |
992 | * This is a transitional helper useful for converting drivers to the atomic | |
993 | * interfaces. | |
994 | */ | |
995 | int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, | |
996 | struct drm_framebuffer *old_fb) | |
997 | { | |
998 | struct drm_plane_state *plane_state; | |
999 | struct drm_plane *plane = crtc->primary; | |
1000 | ||
1001 | if (plane->funcs->atomic_duplicate_state) | |
1002 | plane_state = plane->funcs->atomic_duplicate_state(plane); | |
1003 | else if (plane->state) | |
321ebf04 | 1004 | plane_state = drm_atomic_helper_plane_duplicate_state(plane); |
2f324b42 DV |
1005 | else |
1006 | plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL); | |
1007 | if (!plane_state) | |
1008 | return -ENOMEM; | |
07cc0ef6 | 1009 | plane_state->plane = plane; |
2f324b42 DV |
1010 | |
1011 | plane_state->crtc = crtc; | |
321ebf04 | 1012 | drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb); |
2f324b42 DV |
1013 | plane_state->crtc_x = 0; |
1014 | plane_state->crtc_y = 0; | |
1015 | plane_state->crtc_h = crtc->mode.vdisplay; | |
1016 | plane_state->crtc_w = crtc->mode.hdisplay; | |
1017 | plane_state->src_x = x << 16; | |
1018 | plane_state->src_y = y << 16; | |
1019 | plane_state->src_h = crtc->mode.vdisplay << 16; | |
1020 | plane_state->src_w = crtc->mode.hdisplay << 16; | |
1021 | ||
1022 | return drm_plane_helper_commit(plane, plane_state, old_fb); | |
1023 | } | |
1024 | EXPORT_SYMBOL(drm_helper_crtc_mode_set_base); |