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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 | ||
e58f637b CW |
75 | static bool drm_kms_helper_poll = true; |
76 | module_param_named(poll, drm_kms_helper_poll, bool, 0600); | |
77 | ||
6714977b | 78 | static void drm_mode_validate_flag(struct drm_connector *connector, |
79 | int flags) | |
80 | { | |
a1178ca0 | 81 | struct drm_display_mode *mode; |
6714977b | 82 | |
560a067a DL |
83 | if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE | |
84 | DRM_MODE_FLAG_3D_MASK)) | |
6714977b | 85 | return; |
86 | ||
a1178ca0 | 87 | list_for_each_entry(mode, &connector->modes, head) { |
6714977b | 88 | if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && |
89 | !(flags & DRM_MODE_FLAG_INTERLACE)) | |
90 | mode->status = MODE_NO_INTERLACE; | |
91 | if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && | |
92 | !(flags & DRM_MODE_FLAG_DBLSCAN)) | |
93 | mode->status = MODE_NO_DBLESCAN; | |
560a067a DL |
94 | if ((mode->flags & DRM_MODE_FLAG_3D_MASK) && |
95 | !(flags & DRM_MODE_FLAG_3D_MASK)) | |
96 | mode->status = MODE_NO_STEREO; | |
6714977b | 97 | } |
98 | ||
99 | return; | |
100 | } | |
101 | ||
f453ba04 | 102 | /** |
38651674 | 103 | * drm_helper_probe_single_connector_modes - get complete set of display modes |
0d4ed4c8 | 104 | * @connector: connector to probe |
f453ba04 DA |
105 | * @maxX: max width for modes |
106 | * @maxY: max height for modes | |
107 | * | |
0d4ed4c8 DV |
108 | * Based on the helper callbacks implemented by @connector try to detect all |
109 | * valid modes. Modes will first be added to the connector's probed_modes list, | |
110 | * then culled (based on validity and the @maxX, @maxY parameters) and put into | |
111 | * the normal modes list. | |
f453ba04 | 112 | * |
1eee814d LD |
113 | * Intended to be use as a generic implementation of the ->fill_modes() |
114 | * @connector vfunc for drivers that use the crtc helpers for output mode | |
115 | * filtering and detection. | |
40a518d9 | 116 | * |
3fcc42e0 DV |
117 | * Returns: |
118 | * The number of modes found on @connector. | |
f453ba04 | 119 | */ |
40a518d9 JB |
120 | int drm_helper_probe_single_connector_modes(struct drm_connector *connector, |
121 | uint32_t maxX, uint32_t maxY) | |
f453ba04 DA |
122 | { |
123 | struct drm_device *dev = connector->dev; | |
a1178ca0 | 124 | struct drm_display_mode *mode; |
f453ba04 DA |
125 | struct drm_connector_helper_funcs *connector_funcs = |
126 | connector->helper_private; | |
40a518d9 | 127 | int count = 0; |
6714977b | 128 | int mode_flags = 0; |
ebbd97ad | 129 | bool verbose_prune = true; |
f453ba04 | 130 | |
62ff94a5 DV |
131 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
132 | ||
9440106b JG |
133 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, |
134 | drm_get_connector_name(connector)); | |
f453ba04 | 135 | /* set all modes to the unverified state */ |
a1178ca0 | 136 | list_for_each_entry(mode, &connector->modes, head) |
f453ba04 DA |
137 | mode->status = MODE_UNVERIFIED; |
138 | ||
d50ba256 DA |
139 | if (connector->force) { |
140 | if (connector->force == DRM_FORCE_ON) | |
141 | connector->status = connector_status_connected; | |
142 | else | |
143 | connector->status = connector_status_disconnected; | |
144 | if (connector->funcs->force) | |
145 | connector->funcs->force(connector); | |
e58f637b | 146 | } else { |
930a9e28 | 147 | connector->status = connector->funcs->detect(connector, true); |
e58f637b | 148 | } |
f453ba04 | 149 | |
905bc9ff DV |
150 | /* Re-enable polling in case the global poll config changed. */ |
151 | if (drm_kms_helper_poll != dev->mode_config.poll_running) | |
152 | drm_kms_helper_poll_enable(dev); | |
153 | ||
154 | dev->mode_config.poll_running = drm_kms_helper_poll; | |
155 | ||
f453ba04 | 156 | if (connector->status == connector_status_disconnected) { |
9440106b JG |
157 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", |
158 | connector->base.id, drm_get_connector_name(connector)); | |
72539832 | 159 | drm_mode_connector_update_edid_property(connector, NULL); |
ebbd97ad | 160 | verbose_prune = false; |
620f3781 | 161 | goto prune; |
f453ba04 DA |
162 | } |
163 | ||
da0df92b CE |
164 | #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE |
165 | count = drm_load_edid_firmware(connector); | |
166 | if (count == 0) | |
167 | #endif | |
168 | count = (*connector_funcs->get_modes)(connector); | |
169 | ||
c7ef35a9 | 170 | if (count == 0 && connector->status == connector_status_connected) |
9632b41f | 171 | count = drm_add_modes_noedid(connector, 1024, 768); |
c7ef35a9 CW |
172 | if (count == 0) |
173 | goto prune; | |
f453ba04 | 174 | |
40a518d9 | 175 | drm_mode_connector_list_update(connector); |
f453ba04 DA |
176 | |
177 | if (maxX && maxY) | |
3e70292c | 178 | drm_mode_validate_size(dev, &connector->modes, maxX, maxY); |
6714977b | 179 | |
180 | if (connector->interlace_allowed) | |
181 | mode_flags |= DRM_MODE_FLAG_INTERLACE; | |
182 | if (connector->doublescan_allowed) | |
183 | mode_flags |= DRM_MODE_FLAG_DBLSCAN; | |
560a067a DL |
184 | if (connector->stereo_allowed) |
185 | mode_flags |= DRM_MODE_FLAG_3D_MASK; | |
6714977b | 186 | drm_mode_validate_flag(connector, mode_flags); |
187 | ||
a1178ca0 | 188 | list_for_each_entry(mode, &connector->modes, head) { |
f453ba04 DA |
189 | if (mode->status == MODE_OK) |
190 | mode->status = connector_funcs->mode_valid(connector, | |
191 | mode); | |
192 | } | |
193 | ||
620f3781 | 194 | prune: |
ebbd97ad | 195 | drm_mode_prune_invalid(dev, &connector->modes, verbose_prune); |
f453ba04 | 196 | |
40a518d9 JB |
197 | if (list_empty(&connector->modes)) |
198 | return 0; | |
f453ba04 | 199 | |
9bc3cd56 VS |
200 | list_for_each_entry(mode, &connector->modes, head) |
201 | mode->vrefresh = drm_mode_vrefresh(mode); | |
202 | ||
f453ba04 DA |
203 | drm_mode_sort(&connector->modes); |
204 | ||
9440106b JG |
205 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, |
206 | drm_get_connector_name(connector)); | |
a1178ca0 | 207 | list_for_each_entry(mode, &connector->modes, head) { |
f453ba04 DA |
208 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
209 | drm_mode_debug_printmodeline(mode); | |
210 | } | |
40a518d9 JB |
211 | |
212 | return count; | |
f453ba04 DA |
213 | } |
214 | EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); | |
215 | ||
c9fb15f6 KP |
216 | /** |
217 | * drm_helper_encoder_in_use - check if a given encoder is in use | |
218 | * @encoder: encoder to check | |
219 | * | |
3fcc42e0 DV |
220 | * Checks whether @encoder is with the current mode setting output configuration |
221 | * in use by any connector. This doesn't mean that it is actually enabled since | |
222 | * the DPMS state is tracked separately. | |
c9fb15f6 | 223 | * |
3fcc42e0 DV |
224 | * Returns: |
225 | * True if @encoder is used, false otherwise. | |
c9fb15f6 KP |
226 | */ |
227 | bool drm_helper_encoder_in_use(struct drm_encoder *encoder) | |
228 | { | |
229 | struct drm_connector *connector; | |
230 | struct drm_device *dev = encoder->dev; | |
62ff94a5 DV |
231 | |
232 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
c9fb15f6 KP |
233 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
234 | if (connector->encoder == encoder) | |
235 | return true; | |
236 | return false; | |
237 | } | |
238 | EXPORT_SYMBOL(drm_helper_encoder_in_use); | |
239 | ||
f453ba04 DA |
240 | /** |
241 | * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config | |
242 | * @crtc: CRTC to check | |
243 | * | |
3fcc42e0 DV |
244 | * Checks whether @crtc is with the current mode setting output configuration |
245 | * in use by any connector. This doesn't mean that it is actually enabled since | |
246 | * the DPMS state is tracked separately. | |
f453ba04 | 247 | * |
3fcc42e0 DV |
248 | * Returns: |
249 | * True if @crtc is used, false otherwise. | |
f453ba04 DA |
250 | */ |
251 | bool drm_helper_crtc_in_use(struct drm_crtc *crtc) | |
252 | { | |
253 | struct drm_encoder *encoder; | |
254 | struct drm_device *dev = crtc->dev; | |
62ff94a5 DV |
255 | |
256 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); | |
f453ba04 | 257 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
c9fb15f6 | 258 | if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
f453ba04 DA |
259 | return true; |
260 | return false; | |
261 | } | |
262 | EXPORT_SYMBOL(drm_helper_crtc_in_use); | |
263 | ||
86a1b9d1 BS |
264 | static void |
265 | drm_encoder_disable(struct drm_encoder *encoder) | |
266 | { | |
267 | struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; | |
268 | ||
3b336ec4 SP |
269 | if (encoder->bridge) |
270 | encoder->bridge->funcs->disable(encoder->bridge); | |
271 | ||
86a1b9d1 BS |
272 | if (encoder_funcs->disable) |
273 | (*encoder_funcs->disable)(encoder); | |
274 | else | |
275 | (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); | |
3b336ec4 SP |
276 | |
277 | if (encoder->bridge) | |
278 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
86a1b9d1 BS |
279 | } |
280 | ||
f453ba04 | 281 | /** |
89347bb8 | 282 | * drm_helper_disable_unused_functions - disable unused objects |
f453ba04 DA |
283 | * @dev: DRM device |
284 | * | |
3fcc42e0 DV |
285 | * This function walks through the entire mode setting configuration of @dev. It |
286 | * will remove any crtc links of unused encoders and encoder links of | |
287 | * disconnected connectors. Then it will disable all unused encoders and crtcs | |
288 | * either by calling their disable callback if available or by calling their | |
289 | * dpms callback with DRM_MODE_DPMS_OFF. | |
f453ba04 DA |
290 | */ |
291 | void drm_helper_disable_unused_functions(struct drm_device *dev) | |
292 | { | |
293 | struct drm_encoder *encoder; | |
a3a0544b | 294 | struct drm_connector *connector; |
f453ba04 DA |
295 | struct drm_crtc *crtc; |
296 | ||
62ff94a5 DV |
297 | drm_warn_on_modeset_not_all_locked(dev); |
298 | ||
a3a0544b DA |
299 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
300 | if (!connector->encoder) | |
301 | continue; | |
302 | if (connector->status == connector_status_disconnected) | |
303 | connector->encoder = NULL; | |
304 | } | |
305 | ||
f453ba04 | 306 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
92971021 | 307 | if (!drm_helper_encoder_in_use(encoder)) { |
86a1b9d1 | 308 | drm_encoder_disable(encoder); |
9c552dd7 DA |
309 | /* disconnector encoder from any connector */ |
310 | encoder->crtc = NULL; | |
a3a0544b | 311 | } |
f453ba04 DA |
312 | } |
313 | ||
314 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
315 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
316 | crtc->enabled = drm_helper_crtc_in_use(crtc); | |
317 | if (!crtc->enabled) { | |
5c8d7171 AD |
318 | if (crtc_funcs->disable) |
319 | (*crtc_funcs->disable)(crtc); | |
320 | else | |
321 | (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); | |
f453ba04 DA |
322 | crtc->fb = NULL; |
323 | } | |
324 | } | |
325 | } | |
326 | EXPORT_SYMBOL(drm_helper_disable_unused_functions); | |
327 | ||
7bec756c JB |
328 | /* |
329 | * Check the CRTC we're going to map each output to vs. its current | |
330 | * CRTC. If they don't match, we have to disable the output and the CRTC | |
331 | * since the driver will have to re-route things. | |
332 | */ | |
333 | static void | |
334 | drm_crtc_prepare_encoders(struct drm_device *dev) | |
335 | { | |
336 | struct drm_encoder_helper_funcs *encoder_funcs; | |
337 | struct drm_encoder *encoder; | |
338 | ||
339 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
340 | encoder_funcs = encoder->helper_private; | |
341 | /* Disable unused encoders */ | |
342 | if (encoder->crtc == NULL) | |
86a1b9d1 | 343 | drm_encoder_disable(encoder); |
7bec756c JB |
344 | /* Disable encoders whose CRTC is about to change */ |
345 | if (encoder_funcs->get_crtc && | |
346 | encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) | |
86a1b9d1 | 347 | drm_encoder_disable(encoder); |
7bec756c JB |
348 | } |
349 | } | |
350 | ||
f453ba04 | 351 | /** |
0d4ed4c8 | 352 | * drm_crtc_helper_set_mode - internal helper to set a mode |
f453ba04 DA |
353 | * @crtc: CRTC to program |
354 | * @mode: mode to use | |
4c9287c6 AD |
355 | * @x: horizontal offset into the surface |
356 | * @y: vertical offset into the surface | |
0d4ed4c8 | 357 | * @old_fb: old framebuffer, for cleanup |
f453ba04 | 358 | * |
f453ba04 | 359 | * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance |
0d4ed4c8 DV |
360 | * to fixup or reject the mode prior to trying to set it. This is an internal |
361 | * helper that drivers could e.g. use to update properties that require the | |
362 | * entire output pipe to be disabled and re-enabled in a new configuration. For | |
363 | * example for changing whether audio is enabled on a hdmi link or for changing | |
364 | * panel fitter or dither attributes. It is also called by the | |
365 | * drm_crtc_helper_set_config() helper function to drive the mode setting | |
366 | * sequence. | |
f453ba04 | 367 | * |
3fcc42e0 DV |
368 | * Returns: |
369 | * True if the mode was set successfully, false otherwise. | |
f453ba04 DA |
370 | */ |
371 | bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, | |
372 | struct drm_display_mode *mode, | |
3c4fdcfb KH |
373 | int x, int y, |
374 | struct drm_framebuffer *old_fb) | |
f453ba04 DA |
375 | { |
376 | struct drm_device *dev = crtc->dev; | |
7e99acdc | 377 | struct drm_display_mode *adjusted_mode, saved_mode; |
f453ba04 DA |
378 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
379 | struct drm_encoder_helper_funcs *encoder_funcs; | |
380 | int saved_x, saved_y; | |
7e99acdc | 381 | bool saved_enabled; |
f453ba04 DA |
382 | struct drm_encoder *encoder; |
383 | bool ret = true; | |
384 | ||
62ff94a5 DV |
385 | drm_warn_on_modeset_not_all_locked(dev); |
386 | ||
7e99acdc | 387 | saved_enabled = crtc->enabled; |
f453ba04 | 388 | crtc->enabled = drm_helper_crtc_in_use(crtc); |
f453ba04 DA |
389 | if (!crtc->enabled) |
390 | return true; | |
391 | ||
021a8455 | 392 | adjusted_mode = drm_mode_duplicate(dev, mode); |
7e99acdc IH |
393 | if (!adjusted_mode) { |
394 | crtc->enabled = saved_enabled; | |
6bfc56aa | 395 | return false; |
7e99acdc | 396 | } |
021a8455 | 397 | |
f453ba04 DA |
398 | saved_mode = crtc->mode; |
399 | saved_x = crtc->x; | |
400 | saved_y = crtc->y; | |
401 | ||
402 | /* Update crtc values up front so the driver can rely on them for mode | |
403 | * setting. | |
404 | */ | |
405 | crtc->mode = *mode; | |
406 | crtc->x = x; | |
407 | crtc->y = y; | |
408 | ||
f453ba04 DA |
409 | /* Pass our mode to the connectors and the CRTC to give them a chance to |
410 | * adjust it according to limitations or connector properties, and also | |
411 | * a chance to reject the mode entirely. | |
412 | */ | |
413 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
414 | ||
415 | if (encoder->crtc != crtc) | |
416 | continue; | |
3b336ec4 SP |
417 | |
418 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { | |
419 | ret = encoder->bridge->funcs->mode_fixup( | |
420 | encoder->bridge, mode, adjusted_mode); | |
421 | if (!ret) { | |
422 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
423 | goto done; | |
424 | } | |
425 | } | |
426 | ||
f453ba04 DA |
427 | encoder_funcs = encoder->helper_private; |
428 | if (!(ret = encoder_funcs->mode_fixup(encoder, mode, | |
429 | adjusted_mode))) { | |
836e53d7 | 430 | DRM_DEBUG_KMS("Encoder fixup failed\n"); |
f453ba04 DA |
431 | goto done; |
432 | } | |
433 | } | |
434 | ||
435 | if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { | |
836e53d7 | 436 | DRM_DEBUG_KMS("CRTC fixup failed\n"); |
f453ba04 DA |
437 | goto done; |
438 | } | |
9440106b | 439 | DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); |
f453ba04 DA |
440 | |
441 | /* Prepare the encoders and CRTCs before setting the mode. */ | |
442 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
443 | ||
444 | if (encoder->crtc != crtc) | |
445 | continue; | |
3b336ec4 SP |
446 | |
447 | if (encoder->bridge) | |
448 | encoder->bridge->funcs->disable(encoder->bridge); | |
449 | ||
f453ba04 DA |
450 | encoder_funcs = encoder->helper_private; |
451 | /* Disable the encoders as the first thing we do. */ | |
452 | encoder_funcs->prepare(encoder); | |
3b336ec4 SP |
453 | |
454 | if (encoder->bridge) | |
455 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
f453ba04 DA |
456 | } |
457 | ||
7bec756c JB |
458 | drm_crtc_prepare_encoders(dev); |
459 | ||
f453ba04 DA |
460 | crtc_funcs->prepare(crtc); |
461 | ||
462 | /* Set up the DPLL and any encoders state that needs to adjust or depend | |
463 | * on the DPLL. | |
464 | */ | |
5c3b82e2 CW |
465 | ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
466 | if (!ret) | |
467 | goto done; | |
f453ba04 DA |
468 | |
469 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
470 | ||
471 | if (encoder->crtc != crtc) | |
472 | continue; | |
473 | ||
9440106b JG |
474 | DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", |
475 | encoder->base.id, drm_get_encoder_name(encoder), | |
476 | mode->base.id, mode->name); | |
f453ba04 DA |
477 | encoder_funcs = encoder->helper_private; |
478 | encoder_funcs->mode_set(encoder, mode, adjusted_mode); | |
3b336ec4 SP |
479 | |
480 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
481 | encoder->bridge->funcs->mode_set(encoder->bridge, mode, | |
482 | adjusted_mode); | |
f453ba04 DA |
483 | } |
484 | ||
485 | /* Now enable the clocks, plane, pipe, and connectors that we set up. */ | |
486 | crtc_funcs->commit(crtc); | |
487 | ||
488 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
489 | ||
490 | if (encoder->crtc != crtc) | |
491 | continue; | |
492 | ||
3b336ec4 SP |
493 | if (encoder->bridge) |
494 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
495 | ||
f453ba04 DA |
496 | encoder_funcs = encoder->helper_private; |
497 | encoder_funcs->commit(encoder); | |
498 | ||
3b336ec4 SP |
499 | if (encoder->bridge) |
500 | encoder->bridge->funcs->enable(encoder->bridge); | |
f453ba04 DA |
501 | } |
502 | ||
27641c3f MK |
503 | /* Store real post-adjustment hardware mode. */ |
504 | crtc->hwmode = *adjusted_mode; | |
505 | ||
506 | /* Calculate and store various constants which | |
507 | * are later needed by vblank and swap-completion | |
508 | * timestamping. They are derived from true hwmode. | |
509 | */ | |
545cdd55 | 510 | drm_calc_timestamping_constants(crtc, &crtc->hwmode); |
27641c3f | 511 | |
f453ba04 DA |
512 | /* FIXME: add subpixel order */ |
513 | done: | |
021a8455 | 514 | drm_mode_destroy(dev, adjusted_mode); |
f453ba04 | 515 | if (!ret) { |
7e99acdc | 516 | crtc->enabled = saved_enabled; |
f453ba04 DA |
517 | crtc->mode = saved_mode; |
518 | crtc->x = saved_x; | |
519 | crtc->y = saved_y; | |
520 | } | |
521 | ||
522 | return ret; | |
523 | } | |
524 | EXPORT_SYMBOL(drm_crtc_helper_set_mode); | |
525 | ||
526 | ||
6eebd6bb CW |
527 | static int |
528 | drm_crtc_helper_disable(struct drm_crtc *crtc) | |
529 | { | |
530 | struct drm_device *dev = crtc->dev; | |
531 | struct drm_connector *connector; | |
532 | struct drm_encoder *encoder; | |
533 | ||
534 | /* Decouple all encoders and their attached connectors from this crtc */ | |
535 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
536 | if (encoder->crtc != crtc) | |
537 | continue; | |
538 | ||
539 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
540 | if (connector->encoder != encoder) | |
541 | continue; | |
542 | ||
543 | connector->encoder = NULL; | |
a6ad6230 TR |
544 | |
545 | /* | |
546 | * drm_helper_disable_unused_functions() ought to be | |
547 | * doing this, but since we've decoupled the encoder | |
548 | * from the connector above, the required connection | |
549 | * between them is henceforth no longer available. | |
550 | */ | |
551 | connector->dpms = DRM_MODE_DPMS_OFF; | |
6eebd6bb CW |
552 | } |
553 | } | |
554 | ||
555 | drm_helper_disable_unused_functions(dev); | |
556 | return 0; | |
557 | } | |
558 | ||
f453ba04 DA |
559 | /** |
560 | * drm_crtc_helper_set_config - set a new config from userspace | |
0d4ed4c8 | 561 | * @set: mode set configuration |
f453ba04 | 562 | * |
0d4ed4c8 DV |
563 | * Setup a new configuration, provided by the upper layers (either an ioctl call |
564 | * from userspace or internally e.g. from the fbdev suppport code) in @set, and | |
565 | * enable it. This is the main helper functions for drivers that implement | |
566 | * kernel mode setting with the crtc helper functions and the assorted | |
567 | * ->prepare(), ->modeset() and ->commit() helper callbacks. | |
f453ba04 | 568 | * |
3fcc42e0 DV |
569 | * Returns: |
570 | * Returns 0 on success, negative errno numbers on failure. | |
f453ba04 DA |
571 | */ |
572 | int drm_crtc_helper_set_config(struct drm_mode_set *set) | |
573 | { | |
574 | struct drm_device *dev; | |
02ee4e94 | 575 | struct drm_crtc *new_crtc; |
e67aae79 | 576 | struct drm_encoder *save_encoders, *new_encoder, *encoder; |
4cb72b17 JB |
577 | bool mode_changed = false; /* if true do a full mode set */ |
578 | bool fb_changed = false; /* if true and !mode_changed just do a flip */ | |
e67aae79 | 579 | struct drm_connector *save_connectors, *connector; |
f453ba04 DA |
580 | int count = 0, ro, fail = 0; |
581 | struct drm_crtc_helper_funcs *crtc_funcs; | |
c5006cfe | 582 | struct drm_mode_set save_set; |
4a1b0714 | 583 | int ret; |
bf9dc102 | 584 | int i; |
f453ba04 | 585 | |
58367ed6 | 586 | DRM_DEBUG_KMS("\n"); |
f453ba04 | 587 | |
e58de880 DV |
588 | BUG_ON(!set); |
589 | BUG_ON(!set->crtc); | |
590 | BUG_ON(!set->crtc->helper_private); | |
f453ba04 | 591 | |
e58de880 DV |
592 | /* Enforce sane interface api - has been abused by the fb helper. */ |
593 | BUG_ON(!set->mode && set->fb); | |
594 | BUG_ON(set->fb && set->num_connectors == 0); | |
f453ba04 DA |
595 | |
596 | crtc_funcs = set->crtc->helper_private; | |
597 | ||
ede3ff52 CW |
598 | if (!set->mode) |
599 | set->fb = NULL; | |
600 | ||
9440106b JG |
601 | if (set->fb) { |
602 | DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", | |
603 | set->crtc->base.id, set->fb->base.id, | |
604 | (int)set->num_connectors, set->x, set->y); | |
605 | } else { | |
ede3ff52 | 606 | DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); |
6eebd6bb | 607 | return drm_crtc_helper_disable(set->crtc); |
9440106b | 608 | } |
f453ba04 DA |
609 | |
610 | dev = set->crtc->dev; | |
611 | ||
62ff94a5 DV |
612 | drm_warn_on_modeset_not_all_locked(dev); |
613 | ||
02ee4e94 IH |
614 | /* |
615 | * Allocate space for the backup of all (non-pointer) encoder and | |
616 | * connector data. | |
617 | */ | |
e67aae79 MM |
618 | save_encoders = kzalloc(dev->mode_config.num_encoder * |
619 | sizeof(struct drm_encoder), GFP_KERNEL); | |
02ee4e94 | 620 | if (!save_encoders) |
f453ba04 | 621 | return -ENOMEM; |
f453ba04 | 622 | |
e67aae79 MM |
623 | save_connectors = kzalloc(dev->mode_config.num_connector * |
624 | sizeof(struct drm_connector), GFP_KERNEL); | |
625 | if (!save_connectors) { | |
e67aae79 MM |
626 | kfree(save_encoders); |
627 | return -ENOMEM; | |
628 | } | |
629 | ||
02ee4e94 IH |
630 | /* |
631 | * Copy data. Note that driver private data is not affected. | |
e67aae79 MM |
632 | * Should anything bad happen only the expected state is |
633 | * restored, not the drivers personal bookkeeping. | |
634 | */ | |
e67aae79 MM |
635 | count = 0; |
636 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
637 | save_encoders[count++] = *encoder; | |
638 | } | |
639 | ||
640 | count = 0; | |
641 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
642 | save_connectors[count++] = *connector; | |
643 | } | |
644 | ||
c5006cfe JB |
645 | save_set.crtc = set->crtc; |
646 | save_set.mode = &set->crtc->mode; | |
647 | save_set.x = set->crtc->x; | |
648 | save_set.y = set->crtc->y; | |
649 | save_set.fb = set->crtc->fb; | |
650 | ||
f453ba04 DA |
651 | /* We should be able to check here if the fb has the same properties |
652 | * and then just flip_or_move it */ | |
653 | if (set->crtc->fb != set->fb) { | |
712531bf | 654 | /* If we have no fb then treat it as a full mode set */ |
7bec756c | 655 | if (set->crtc->fb == NULL) { |
58367ed6 | 656 | DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
712531bf | 657 | mode_changed = true; |
4cb72b17 JB |
658 | } else if (set->fb == NULL) { |
659 | mode_changed = true; | |
ce83adf7 LP |
660 | } else if (set->fb->pixel_format != |
661 | set->crtc->fb->pixel_format) { | |
662 | mode_changed = true; | |
8dff4742 | 663 | } else |
712531bf | 664 | fb_changed = true; |
f453ba04 DA |
665 | } |
666 | ||
667 | if (set->x != set->crtc->x || set->y != set->crtc->y) | |
712531bf | 668 | fb_changed = true; |
f453ba04 DA |
669 | |
670 | if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { | |
58367ed6 | 671 | DRM_DEBUG_KMS("modes are different, full mode set\n"); |
f453ba04 DA |
672 | drm_mode_debug_printmodeline(&set->crtc->mode); |
673 | drm_mode_debug_printmodeline(set->mode); | |
712531bf | 674 | mode_changed = true; |
f453ba04 DA |
675 | } |
676 | ||
677 | /* a) traverse passed in connector list and get encoders for them */ | |
678 | count = 0; | |
679 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
680 | struct drm_connector_helper_funcs *connector_funcs = | |
681 | connector->helper_private; | |
f453ba04 DA |
682 | new_encoder = connector->encoder; |
683 | for (ro = 0; ro < set->num_connectors; ro++) { | |
684 | if (set->connectors[ro] == connector) { | |
685 | new_encoder = connector_funcs->best_encoder(connector); | |
686 | /* if we can't get an encoder for a connector | |
687 | we are setting now - then fail */ | |
688 | if (new_encoder == NULL) | |
689 | /* don't break so fail path works correct */ | |
690 | fail = 1; | |
691 | break; | |
25f397a4 DV |
692 | |
693 | if (connector->dpms != DRM_MODE_DPMS_ON) { | |
694 | DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); | |
695 | mode_changed = true; | |
696 | } | |
f453ba04 DA |
697 | } |
698 | } | |
699 | ||
700 | if (new_encoder != connector->encoder) { | |
58367ed6 | 701 | DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
712531bf | 702 | mode_changed = true; |
ff846ab7 MM |
703 | /* If the encoder is reused for another connector, then |
704 | * the appropriate crtc will be set later. | |
705 | */ | |
ff6fdbed MM |
706 | if (connector->encoder) |
707 | connector->encoder->crtc = NULL; | |
f453ba04 DA |
708 | connector->encoder = new_encoder; |
709 | } | |
710 | } | |
711 | ||
712 | if (fail) { | |
713 | ret = -EINVAL; | |
e67aae79 | 714 | goto fail; |
f453ba04 DA |
715 | } |
716 | ||
717 | count = 0; | |
718 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
719 | if (!connector->encoder) | |
720 | continue; | |
721 | ||
f453ba04 DA |
722 | if (connector->encoder->crtc == set->crtc) |
723 | new_crtc = NULL; | |
724 | else | |
725 | new_crtc = connector->encoder->crtc; | |
726 | ||
727 | for (ro = 0; ro < set->num_connectors; ro++) { | |
728 | if (set->connectors[ro] == connector) | |
729 | new_crtc = set->crtc; | |
730 | } | |
7bec756c JB |
731 | |
732 | /* Make sure the new CRTC will work with the encoder */ | |
733 | if (new_crtc && | |
734 | !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { | |
735 | ret = -EINVAL; | |
e67aae79 | 736 | goto fail; |
7bec756c | 737 | } |
f453ba04 | 738 | if (new_crtc != connector->encoder->crtc) { |
58367ed6 | 739 | DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
712531bf | 740 | mode_changed = true; |
f453ba04 DA |
741 | connector->encoder->crtc = new_crtc; |
742 | } | |
9440106b JG |
743 | if (new_crtc) { |
744 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", | |
745 | connector->base.id, drm_get_connector_name(connector), | |
746 | new_crtc->base.id); | |
747 | } else { | |
748 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", | |
749 | connector->base.id, drm_get_connector_name(connector)); | |
750 | } | |
f453ba04 DA |
751 | } |
752 | ||
753 | /* mode_set_base is not a required function */ | |
712531bf JB |
754 | if (fb_changed && !crtc_funcs->mode_set_base) |
755 | mode_changed = true; | |
f453ba04 | 756 | |
712531bf | 757 | if (mode_changed) { |
48b1f5dd | 758 | if (drm_helper_crtc_in_use(set->crtc)) { |
58367ed6 ZY |
759 | DRM_DEBUG_KMS("attempting to set mode from" |
760 | " userspace\n"); | |
f453ba04 | 761 | drm_mode_debug_printmodeline(set->mode); |
356ad3cd | 762 | set->crtc->fb = set->fb; |
f453ba04 | 763 | if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
3c4fdcfb | 764 | set->x, set->y, |
bec2eac3 | 765 | save_set.fb)) { |
9440106b JG |
766 | DRM_ERROR("failed to set mode on [CRTC:%d]\n", |
767 | set->crtc->base.id); | |
bec2eac3 | 768 | set->crtc->fb = save_set.fb; |
f453ba04 | 769 | ret = -EINVAL; |
e67aae79 | 770 | goto fail; |
f453ba04 | 771 | } |
25f397a4 DV |
772 | DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); |
773 | for (i = 0; i < set->num_connectors; i++) { | |
774 | DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, | |
775 | drm_get_connector_name(set->connectors[i])); | |
776 | set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); | |
777 | } | |
f453ba04 DA |
778 | } |
779 | drm_helper_disable_unused_functions(dev); | |
712531bf | 780 | } else if (fb_changed) { |
9b1596af BS |
781 | set->crtc->x = set->x; |
782 | set->crtc->y = set->y; | |
fc50a890 | 783 | set->crtc->fb = set->fb; |
5c3b82e2 | 784 | ret = crtc_funcs->mode_set_base(set->crtc, |
bec2eac3 | 785 | set->x, set->y, save_set.fb); |
0ba41e44 | 786 | if (ret != 0) { |
fbce4064 IH |
787 | set->crtc->x = save_set.x; |
788 | set->crtc->y = save_set.y; | |
bec2eac3 | 789 | set->crtc->fb = save_set.fb; |
e67aae79 | 790 | goto fail; |
0ba41e44 | 791 | } |
f453ba04 DA |
792 | } |
793 | ||
e67aae79 | 794 | kfree(save_connectors); |
f453ba04 | 795 | kfree(save_encoders); |
f453ba04 DA |
796 | return 0; |
797 | ||
e67aae79 MM |
798 | fail: |
799 | /* Restore all previous data. */ | |
e67aae79 MM |
800 | count = 0; |
801 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
802 | *encoder = save_encoders[count++]; | |
e62fb64e | 803 | } |
e67aae79 | 804 | |
f453ba04 DA |
805 | count = 0; |
806 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
e67aae79 | 807 | *connector = save_connectors[count++]; |
f453ba04 | 808 | } |
e67aae79 | 809 | |
c5006cfe JB |
810 | /* Try to restore the config */ |
811 | if (mode_changed && | |
812 | !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, | |
813 | save_set.y, save_set.fb)) | |
814 | DRM_ERROR("failed to restore config after modeset failure\n"); | |
815 | ||
e67aae79 | 816 | kfree(save_connectors); |
f453ba04 DA |
817 | kfree(save_encoders); |
818 | return ret; | |
819 | } | |
820 | EXPORT_SYMBOL(drm_crtc_helper_set_config); | |
821 | ||
c9fb15f6 KP |
822 | static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
823 | { | |
824 | int dpms = DRM_MODE_DPMS_OFF; | |
825 | struct drm_connector *connector; | |
826 | struct drm_device *dev = encoder->dev; | |
827 | ||
828 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
829 | if (connector->encoder == encoder) | |
830 | if (connector->dpms < dpms) | |
831 | dpms = connector->dpms; | |
832 | return dpms; | |
833 | } | |
834 | ||
3b336ec4 SP |
835 | /* Helper which handles bridge ordering around encoder dpms */ |
836 | static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) | |
837 | { | |
838 | struct drm_bridge *bridge = encoder->bridge; | |
839 | struct drm_encoder_helper_funcs *encoder_funcs; | |
840 | ||
841 | if (bridge) { | |
842 | if (mode == DRM_MODE_DPMS_ON) | |
843 | bridge->funcs->pre_enable(bridge); | |
844 | else | |
845 | bridge->funcs->disable(bridge); | |
846 | } | |
847 | ||
848 | encoder_funcs = encoder->helper_private; | |
849 | if (encoder_funcs->dpms) | |
850 | encoder_funcs->dpms(encoder, mode); | |
851 | ||
852 | if (bridge) { | |
853 | if (mode == DRM_MODE_DPMS_ON) | |
854 | bridge->funcs->enable(bridge); | |
855 | else | |
856 | bridge->funcs->post_disable(bridge); | |
857 | } | |
858 | } | |
859 | ||
c9fb15f6 KP |
860 | static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
861 | { | |
862 | int dpms = DRM_MODE_DPMS_OFF; | |
863 | struct drm_connector *connector; | |
864 | struct drm_device *dev = crtc->dev; | |
865 | ||
866 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) | |
867 | if (connector->encoder && connector->encoder->crtc == crtc) | |
868 | if (connector->dpms < dpms) | |
869 | dpms = connector->dpms; | |
870 | return dpms; | |
871 | } | |
872 | ||
873 | /** | |
0d4ed4c8 DV |
874 | * drm_helper_connector_dpms() - connector dpms helper implementation |
875 | * @connector: affected connector | |
876 | * @mode: DPMS mode | |
c9fb15f6 | 877 | * |
0d4ed4c8 DV |
878 | * This is the main helper function provided by the crtc helper framework for |
879 | * implementing the DPMS connector attribute. It computes the new desired DPMS | |
880 | * state for all encoders and crtcs in the output mesh and calls the ->dpms() | |
881 | * callback provided by the driver appropriately. | |
c9fb15f6 KP |
882 | */ |
883 | void drm_helper_connector_dpms(struct drm_connector *connector, int mode) | |
884 | { | |
885 | struct drm_encoder *encoder = connector->encoder; | |
886 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; | |
3b336ec4 | 887 | int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; |
c9fb15f6 KP |
888 | |
889 | if (mode == connector->dpms) | |
890 | return; | |
891 | ||
892 | old_dpms = connector->dpms; | |
893 | connector->dpms = mode; | |
894 | ||
3b336ec4 SP |
895 | if (encoder) |
896 | encoder_dpms = drm_helper_choose_encoder_dpms(encoder); | |
897 | ||
c9fb15f6 KP |
898 | /* from off to on, do crtc then encoder */ |
899 | if (mode < old_dpms) { | |
900 | if (crtc) { | |
901 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
902 | if (crtc_funcs->dpms) | |
903 | (*crtc_funcs->dpms) (crtc, | |
904 | drm_helper_choose_crtc_dpms(crtc)); | |
905 | } | |
3b336ec4 SP |
906 | if (encoder) |
907 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
908 | } |
909 | ||
910 | /* from on to off, do encoder then crtc */ | |
911 | if (mode > old_dpms) { | |
3b336ec4 SP |
912 | if (encoder) |
913 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
c9fb15f6 KP |
914 | if (crtc) { |
915 | struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; | |
916 | if (crtc_funcs->dpms) | |
917 | (*crtc_funcs->dpms) (crtc, | |
918 | drm_helper_choose_crtc_dpms(crtc)); | |
919 | } | |
920 | } | |
921 | ||
922 | return; | |
923 | } | |
924 | EXPORT_SYMBOL(drm_helper_connector_dpms); | |
925 | ||
3fcc42e0 DV |
926 | /** |
927 | * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata | |
928 | * @fb: drm_framebuffer object to fill out | |
929 | * @mode_cmd: metadata from the userspace fb creation request | |
930 | * | |
931 | * This helper can be used in a drivers fb_create callback to pre-fill the fb's | |
932 | * metadata fields. | |
933 | */ | |
9fd93784 DV |
934 | void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
935 | struct drm_mode_fb_cmd2 *mode_cmd) | |
f453ba04 | 936 | { |
01f2c773 VS |
937 | int i; |
938 | ||
f453ba04 DA |
939 | fb->width = mode_cmd->width; |
940 | fb->height = mode_cmd->height; | |
01f2c773 VS |
941 | for (i = 0; i < 4; i++) { |
942 | fb->pitches[i] = mode_cmd->pitches[i]; | |
943 | fb->offsets[i] = mode_cmd->offsets[i]; | |
944 | } | |
248dbc23 | 945 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, |
308e5bcb JB |
946 | &fb->bits_per_pixel); |
947 | fb->pixel_format = mode_cmd->pixel_format; | |
f453ba04 DA |
948 | } |
949 | EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); | |
950 | ||
aa4cd910 DV |
951 | /** |
952 | * drm_helper_resume_force_mode - force-restore mode setting configuration | |
953 | * @dev: drm_device which should be restored | |
954 | * | |
955 | * Drivers which use the mode setting helpers can use this function to | |
956 | * force-restore the mode setting configuration e.g. on resume or when something | |
957 | * else might have trampled over the hw state (like some overzealous old BIOSen | |
958 | * tended to do). | |
00d762cb DV |
959 | * |
960 | * This helper doesn't provide a error return value since restoring the old | |
961 | * config should never fail due to resource allocation issues since the driver | |
962 | * has successfully set the restored configuration already. Hence this should | |
963 | * boil down to the equivalent of a few dpms on calls, which also don't provide | |
964 | * an error code. | |
965 | * | |
966 | * Drivers where simply restoring an old configuration again might fail (e.g. | |
967 | * due to slight differences in allocating shared resources when the | |
968 | * configuration is restored in a different order than when userspace set it up) | |
969 | * need to use their own restore logic. | |
aa4cd910 | 970 | */ |
00d762cb | 971 | void drm_helper_resume_force_mode(struct drm_device *dev) |
f453ba04 DA |
972 | { |
973 | struct drm_crtc *crtc; | |
89347bb8 | 974 | struct drm_encoder *encoder; |
89347bb8 | 975 | struct drm_crtc_helper_funcs *crtc_funcs; |
00d762cb DV |
976 | int encoder_dpms; |
977 | bool ret; | |
f453ba04 DA |
978 | |
979 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
980 | ||
981 | if (!crtc->enabled) | |
982 | continue; | |
983 | ||
3c4fdcfb KH |
984 | ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
985 | crtc->x, crtc->y, crtc->fb); | |
f453ba04 | 986 | |
00d762cb | 987 | /* Restoring the old config should never fail! */ |
f453ba04 DA |
988 | if (ret == false) |
989 | DRM_ERROR("failed to set mode on crtc %p\n", crtc); | |
89347bb8 DJ |
990 | |
991 | /* Turn off outputs that were already powered off */ | |
992 | if (drm_helper_choose_crtc_dpms(crtc)) { | |
993 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
994 | ||
995 | if(encoder->crtc != crtc) | |
996 | continue; | |
997 | ||
3b336ec4 SP |
998 | encoder_dpms = drm_helper_choose_encoder_dpms( |
999 | encoder); | |
1000 | ||
1001 | drm_helper_encoder_dpms(encoder, encoder_dpms); | |
89347bb8 | 1002 | } |
817e631e CW |
1003 | |
1004 | crtc_funcs = crtc->helper_private; | |
1005 | if (crtc_funcs->dpms) | |
1006 | (*crtc_funcs->dpms) (crtc, | |
1007 | drm_helper_choose_crtc_dpms(crtc)); | |
89347bb8 | 1008 | } |
f453ba04 | 1009 | } |
00d762cb | 1010 | |
af4fcb57 ZY |
1011 | /* disable the unused connectors while restoring the modesetting */ |
1012 | drm_helper_disable_unused_functions(dev); | |
f453ba04 DA |
1013 | } |
1014 | EXPORT_SYMBOL(drm_helper_resume_force_mode); | |
eb1f8e4f | 1015 | |
3fcc42e0 DV |
1016 | /** |
1017 | * drm_kms_helper_hotplug_event - fire off KMS hotplug events | |
1018 | * @dev: drm_device whose connector state changed | |
1019 | * | |
1020 | * This function fires off the uevent for userspace and also calls the | |
1021 | * output_poll_changed function, which is most commonly used to inform the fbdev | |
1022 | * emulation code and allow it to update the fbcon output configuration. | |
1023 | * | |
1024 | * Drivers should call this from their hotplug handling code when a change is | |
1025 | * detected. Note that this function does not do any output detection of its | |
1026 | * own, like drm_helper_hpd_irq_event() does - this is assumed to be done by the | |
1027 | * driver already. | |
1028 | * | |
1029 | * This function must be called from process context with no mode | |
1030 | * setting locks held. | |
1031 | */ | |
3d3683f0 DV |
1032 | void drm_kms_helper_hotplug_event(struct drm_device *dev) |
1033 | { | |
1034 | /* send a uevent + call fbdev */ | |
1035 | drm_sysfs_hotplug_event(dev); | |
1036 | if (dev->mode_config.funcs->output_poll_changed) | |
1037 | dev->mode_config.funcs->output_poll_changed(dev); | |
1038 | } | |
1039 | EXPORT_SYMBOL(drm_kms_helper_hotplug_event); | |
1040 | ||
eb1f8e4f | 1041 | #define DRM_OUTPUT_POLL_PERIOD (10*HZ) |
991ea75c | 1042 | static void output_poll_execute(struct work_struct *work) |
eb1f8e4f | 1043 | { |
991ea75c TH |
1044 | struct delayed_work *delayed_work = to_delayed_work(work); |
1045 | struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); | |
eb1f8e4f | 1046 | struct drm_connector *connector; |
c5027dec | 1047 | enum drm_connector_status old_status; |
d482e5fa | 1048 | bool repoll = false, changed = false; |
eb1f8e4f | 1049 | |
e58f637b CW |
1050 | if (!drm_kms_helper_poll) |
1051 | return; | |
1052 | ||
eb1f8e4f DA |
1053 | mutex_lock(&dev->mode_config.mutex); |
1054 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
1055 | ||
11e68685 DV |
1056 | /* Ignore forced connectors. */ |
1057 | if (connector->force) | |
1058 | continue; | |
1059 | ||
816da85a DV |
1060 | /* Ignore HPD capable connectors and connectors where we don't |
1061 | * want any hotplug detection at all for polling. */ | |
1062 | if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) | |
eb1f8e4f DA |
1063 | continue; |
1064 | ||
a4f968d8 | 1065 | repoll = true; |
eb1f8e4f DA |
1066 | |
1067 | old_status = connector->status; | |
1068 | /* if we are connected and don't want to poll for disconnect | |
1069 | skip it */ | |
1070 | if (old_status == connector_status_connected && | |
816da85a | 1071 | !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) |
eb1f8e4f DA |
1072 | continue; |
1073 | ||
c5027dec | 1074 | connector->status = connector->funcs->detect(connector, false); |
b2dfcae3 LD |
1075 | if (old_status != connector->status) { |
1076 | const char *old, *new; | |
1077 | ||
1078 | old = drm_get_connector_status_name(old_status); | |
1079 | new = drm_get_connector_status_name(connector->status); | |
1080 | ||
1081 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] " | |
1082 | "status updated from %s to %s\n", | |
1083 | connector->base.id, | |
1084 | drm_get_connector_name(connector), | |
1085 | old, new); | |
1086 | ||
eb1f8e4f | 1087 | changed = true; |
b2dfcae3 | 1088 | } |
eb1f8e4f DA |
1089 | } |
1090 | ||
1091 | mutex_unlock(&dev->mode_config.mutex); | |
1092 | ||
3d3683f0 DV |
1093 | if (changed) |
1094 | drm_kms_helper_hotplug_event(dev); | |
eb1f8e4f | 1095 | |
9a919c46 | 1096 | if (repoll) |
3b07e9ca | 1097 | schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); |
eb1f8e4f DA |
1098 | } |
1099 | ||
3fcc42e0 DV |
1100 | /** |
1101 | * drm_kms_helper_poll_disable - disable output polling | |
1102 | * @dev: drm_device | |
1103 | * | |
1104 | * This function disables the output polling work. | |
1105 | * | |
1106 | * Drivers can call this helper from their device suspend implementation. It is | |
1107 | * not an error to call this even when output polling isn't enabled or arlready | |
1108 | * disabled. | |
1109 | */ | |
fbf81762 DA |
1110 | void drm_kms_helper_poll_disable(struct drm_device *dev) |
1111 | { | |
1112 | if (!dev->mode_config.poll_enabled) | |
1113 | return; | |
991ea75c | 1114 | cancel_delayed_work_sync(&dev->mode_config.output_poll_work); |
fbf81762 DA |
1115 | } |
1116 | EXPORT_SYMBOL(drm_kms_helper_poll_disable); | |
1117 | ||
3fcc42e0 DV |
1118 | /** |
1119 | * drm_kms_helper_poll_enable - re-enable output polling. | |
1120 | * @dev: drm_device | |
1121 | * | |
1122 | * This function re-enables the output polling work. | |
1123 | * | |
1124 | * Drivers can call this helper from their device resume implementation. It is | |
1125 | * an error to call this when the output polling support has not yet been set | |
1126 | * up. | |
1127 | */ | |
fbf81762 | 1128 | void drm_kms_helper_poll_enable(struct drm_device *dev) |
eb1f8e4f | 1129 | { |
eb1f8e4f | 1130 | bool poll = false; |
fbf81762 | 1131 | struct drm_connector *connector; |
eb1f8e4f | 1132 | |
e58f637b CW |
1133 | if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) |
1134 | return; | |
1135 | ||
eb1f8e4f | 1136 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
a4f968d8 DV |
1137 | if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | |
1138 | DRM_CONNECTOR_POLL_DISCONNECT)) | |
eb1f8e4f DA |
1139 | poll = true; |
1140 | } | |
eb1f8e4f | 1141 | |
9a919c46 | 1142 | if (poll) |
3b07e9ca | 1143 | schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); |
eb1f8e4f | 1144 | } |
fbf81762 DA |
1145 | EXPORT_SYMBOL(drm_kms_helper_poll_enable); |
1146 | ||
3fcc42e0 DV |
1147 | /** |
1148 | * drm_kms_helper_poll_init - initialize and enable output polling | |
1149 | * @dev: drm_device | |
1150 | * | |
1151 | * This function intializes and then also enables output polling support for | |
1152 | * @dev. Drivers which do not have reliable hotplug support in hardware can use | |
1153 | * this helper infrastructure to regularly poll such connectors for changes in | |
1154 | * their connection state. | |
1155 | * | |
1156 | * Drivers can control which connectors are polled by setting the | |
1157 | * DRM_CONNECTOR_POLL_CONNECT and DRM_CONNECTOR_POLL_DISCONNECT flags. On | |
1158 | * connectors where probing live outputs can result in visual distortion drivers | |
1159 | * should not set the DRM_CONNECTOR_POLL_DISCONNECT flag to avoid this. | |
1160 | * Connectors which have no flag or only DRM_CONNECTOR_POLL_HPD set are | |
1161 | * completely ignored by the polling logic. | |
1162 | * | |
1163 | * Note that a connector can be both polled and probed from the hotplug handler, | |
1164 | * in case the hotplug interrupt is known to be unreliable. | |
1165 | */ | |
fbf81762 DA |
1166 | void drm_kms_helper_poll_init(struct drm_device *dev) |
1167 | { | |
991ea75c | 1168 | INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); |
fbf81762 DA |
1169 | dev->mode_config.poll_enabled = true; |
1170 | ||
1171 | drm_kms_helper_poll_enable(dev); | |
1172 | } | |
eb1f8e4f DA |
1173 | EXPORT_SYMBOL(drm_kms_helper_poll_init); |
1174 | ||
3fcc42e0 DV |
1175 | /** |
1176 | * drm_kms_helper_poll_fini - disable output polling and clean it up | |
1177 | * @dev: drm_device | |
1178 | */ | |
eb1f8e4f DA |
1179 | void drm_kms_helper_poll_fini(struct drm_device *dev) |
1180 | { | |
fbf81762 | 1181 | drm_kms_helper_poll_disable(dev); |
eb1f8e4f DA |
1182 | } |
1183 | EXPORT_SYMBOL(drm_kms_helper_poll_fini); | |
1184 | ||
3fcc42e0 DV |
1185 | /** |
1186 | * drm_helper_hpd_irq_event - hotplug processing | |
1187 | * @dev: drm_device | |
1188 | * | |
1189 | * Drivers can use this helper function to run a detect cycle on all connectors | |
1190 | * which have the DRM_CONNECTOR_POLL_HPD flag set in their &polled member. All | |
1191 | * other connectors are ignored, which is useful to avoid reprobing fixed | |
1192 | * panels. | |
1193 | * | |
1194 | * This helper function is useful for drivers which can't or don't track hotplug | |
1195 | * interrupts for each connector. | |
1196 | * | |
1197 | * Drivers which support hotplug interrupts for each connector individually and | |
1198 | * which have a more fine-grained detect logic should bypass this code and | |
1199 | * directly call drm_kms_helper_hotplug_event() in case the connector state | |
1200 | * changed. | |
1201 | * | |
1202 | * This function must be called from process context with no mode | |
1203 | * setting locks held. | |
1204 | * | |
1205 | * Note that a connector can be both polled and probed from the hotplug handler, | |
1206 | * in case the hotplug interrupt is known to be unreliable. | |
1207 | */ | |
b8206d39 | 1208 | bool drm_helper_hpd_irq_event(struct drm_device *dev) |
eb1f8e4f | 1209 | { |
816da85a DV |
1210 | struct drm_connector *connector; |
1211 | enum drm_connector_status old_status; | |
1212 | bool changed = false; | |
1213 | ||
eb1f8e4f | 1214 | if (!dev->mode_config.poll_enabled) |
b8206d39 | 1215 | return false; |
e58f637b | 1216 | |
816da85a DV |
1217 | mutex_lock(&dev->mode_config.mutex); |
1218 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { | |
1219 | ||
1220 | /* Only handle HPD capable connectors. */ | |
1221 | if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) | |
1222 | continue; | |
1223 | ||
1224 | old_status = connector->status; | |
1225 | ||
1226 | connector->status = connector->funcs->detect(connector, false); | |
ed7951dc | 1227 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n", |
816da85a DV |
1228 | connector->base.id, |
1229 | drm_get_connector_name(connector), | |
ed7951dc LD |
1230 | drm_get_connector_status_name(old_status), |
1231 | drm_get_connector_status_name(connector->status)); | |
816da85a DV |
1232 | if (old_status != connector->status) |
1233 | changed = true; | |
1234 | } | |
1235 | ||
1236 | mutex_unlock(&dev->mode_config.mutex); | |
1237 | ||
1238 | if (changed) | |
1239 | drm_kms_helper_hotplug_event(dev); | |
b8206d39 MAL |
1240 | |
1241 | return changed; | |
816da85a | 1242 | } |
eb1f8e4f | 1243 | EXPORT_SYMBOL(drm_helper_hpd_irq_event); |