Commit | Line | Data |
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785b93ef DA |
1 | /* |
2 | * Copyright (c) 2006-2009 Red Hat Inc. | |
3 | * Copyright (c) 2006-2008 Intel Corporation | |
4 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
5 | * | |
6 | * DRM framebuffer helper functions | |
7 | * | |
8 | * Permission to use, copy, modify, distribute, and sell this software and its | |
9 | * documentation for any purpose is hereby granted without fee, provided that | |
10 | * the above copyright notice appear in all copies and that both that copyright | |
11 | * notice and this permission notice appear in supporting documentation, and | |
12 | * that the name of the copyright holders not be used in advertising or | |
13 | * publicity pertaining to distribution of the software without specific, | |
14 | * written prior permission. The copyright holders make no representations | |
15 | * about the suitability of this software for any purpose. It is provided "as | |
16 | * is" without express or implied warranty. | |
17 | * | |
18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
24 | * OF THIS SOFTWARE. | |
25 | * | |
26 | * Authors: | |
27 | * Dave Airlie <airlied@linux.ie> | |
28 | * Jesse Barnes <jesse.barnes@intel.com> | |
29 | */ | |
d56b1b9d SK |
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | ||
3b40a443 | 32 | #include <linux/kernel.h> |
785b93ef | 33 | #include <linux/sysrq.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
785b93ef | 35 | #include <linux/fb.h> |
e0cd3608 | 36 | #include <linux/module.h> |
760285e7 DH |
37 | #include <drm/drmP.h> |
38 | #include <drm/drm_crtc.h> | |
39 | #include <drm/drm_fb_helper.h> | |
40 | #include <drm/drm_crtc_helper.h> | |
785b93ef DA |
41 | |
42 | static LIST_HEAD(kernel_fb_helper_list); | |
43 | ||
d0ddc033 DV |
44 | /** |
45 | * DOC: fbdev helpers | |
46 | * | |
47 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
83c617c5 | 48 | * mode setting driver. They can be used mostly independently from the crtc |
d0ddc033 DV |
49 | * helper functions used by many drivers to implement the kernel mode setting |
50 | * interfaces. | |
207fd329 | 51 | * |
10a23102 TR |
52 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
53 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and | |
54 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the | |
55 | * default behaviour can override the third step with their own code. | |
56 | * Teardown is done with drm_fb_helper_fini(). | |
207fd329 DV |
57 | * |
58 | * At runtime drivers should restore the fbdev console by calling | |
59 | * drm_fb_helper_restore_fbdev_mode() from their ->lastclose callback. They | |
60 | * should also notify the fb helper code from updates to the output | |
61 | * configuration by calling drm_fb_helper_hotplug_event(). For easier | |
62 | * integration with the output polling code in drm_crtc_helper.c the modeset | |
83c617c5 | 63 | * code provides a ->output_poll_changed callback. |
207fd329 DV |
64 | * |
65 | * All other functions exported by the fb helper library can be used to | |
66 | * implement the fbdev driver interface by the driver. | |
10a23102 TR |
67 | * |
68 | * It is possible, though perhaps somewhat tricky, to implement race-free | |
69 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() | |
70 | * helper must be called first to initialize the minimum required to make | |
71 | * hotplug detection work. Drivers also need to make sure to properly set up | |
72 | * the dev->mode_config.funcs member. After calling drm_kms_helper_poll_init() | |
73 | * it is safe to enable interrupts and start processing hotplug events. At the | |
74 | * same time, drivers should initialize all modeset objects such as CRTCs, | |
75 | * encoders and connectors. To finish up the fbdev helper initialization, the | |
76 | * drm_fb_helper_init() function is called. To probe for all attached displays | |
77 | * and set up an initial configuration using the detected hardware, drivers | |
78 | * should call drm_fb_helper_single_add_all_connectors() followed by | |
79 | * drm_fb_helper_initial_config(). | |
d0ddc033 DV |
80 | */ |
81 | ||
207fd329 DV |
82 | /** |
83 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
84 | * emulation helper | |
85 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
86 | * | |
87 | * This functions adds all the available connectors for use with the given | |
88 | * fb_helper. This is a separate step to allow drivers to freely assign | |
89 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
90 | * not adequate to be used for the fbcon. | |
91 | * | |
92 | * Since this is part of the initial setup before the fbdev is published, no | |
93 | * locking is required. | |
94 | */ | |
0b4c0f3f | 95 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 96 | { |
0b4c0f3f DA |
97 | struct drm_device *dev = fb_helper->dev; |
98 | struct drm_connector *connector; | |
99 | int i; | |
d50ba256 | 100 | |
0b4c0f3f DA |
101 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
102 | struct drm_fb_helper_connector *fb_helper_connector; | |
103 | ||
104 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
105 | if (!fb_helper_connector) | |
106 | goto fail; | |
d50ba256 | 107 | |
0b4c0f3f DA |
108 | fb_helper_connector->connector = connector; |
109 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
110 | } | |
d50ba256 | 111 | return 0; |
0b4c0f3f DA |
112 | fail: |
113 | for (i = 0; i < fb_helper->connector_count; i++) { | |
114 | kfree(fb_helper->connector_info[i]); | |
115 | fb_helper->connector_info[i] = NULL; | |
116 | } | |
117 | fb_helper->connector_count = 0; | |
118 | return -ENOMEM; | |
d50ba256 | 119 | } |
0b4c0f3f | 120 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 121 | |
65c2a89c DA |
122 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) |
123 | { | |
124 | struct drm_fb_helper_connector **temp; | |
125 | struct drm_fb_helper_connector *fb_helper_connector; | |
126 | ||
127 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); | |
128 | if (fb_helper->connector_count + 1 > fb_helper->connector_info_alloc_count) { | |
14f476fa | 129 | temp = krealloc(fb_helper->connector_info, sizeof(struct drm_fb_helper_connector *) * (fb_helper->connector_count + 1), GFP_KERNEL); |
65c2a89c DA |
130 | if (!temp) |
131 | return -ENOMEM; | |
132 | ||
133 | fb_helper->connector_info_alloc_count = fb_helper->connector_count + 1; | |
134 | fb_helper->connector_info = temp; | |
135 | } | |
136 | ||
137 | ||
138 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
139 | if (!fb_helper_connector) | |
140 | return -ENOMEM; | |
141 | ||
142 | fb_helper_connector->connector = connector; | |
143 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
144 | return 0; | |
145 | } | |
146 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); | |
147 | ||
2148f18f RC |
148 | static void remove_from_modeset(struct drm_mode_set *set, |
149 | struct drm_connector *connector) | |
150 | { | |
151 | int i, j; | |
152 | ||
153 | for (i = 0; i < set->num_connectors; i++) { | |
154 | if (set->connectors[i] == connector) | |
155 | break; | |
156 | } | |
157 | ||
158 | if (i == set->num_connectors) | |
159 | return; | |
160 | ||
161 | for (j = i + 1; j < set->num_connectors; j++) { | |
162 | set->connectors[j - 1] = set->connectors[j]; | |
163 | } | |
164 | set->num_connectors--; | |
165 | ||
166 | /* because i915 is pissy about this.. | |
167 | * TODO maybe need to makes sure we set it back to !=NULL somewhere? | |
168 | */ | |
169 | if (set->num_connectors == 0) | |
170 | set->fb = NULL; | |
171 | } | |
172 | ||
65c2a89c DA |
173 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, |
174 | struct drm_connector *connector) | |
175 | { | |
176 | struct drm_fb_helper_connector *fb_helper_connector; | |
177 | int i, j; | |
178 | ||
179 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); | |
180 | ||
181 | for (i = 0; i < fb_helper->connector_count; i++) { | |
182 | if (fb_helper->connector_info[i]->connector == connector) | |
183 | break; | |
184 | } | |
185 | ||
186 | if (i == fb_helper->connector_count) | |
187 | return -EINVAL; | |
188 | fb_helper_connector = fb_helper->connector_info[i]; | |
189 | ||
190 | for (j = i + 1; j < fb_helper->connector_count; j++) { | |
191 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; | |
192 | } | |
193 | fb_helper->connector_count--; | |
194 | kfree(fb_helper_connector); | |
2148f18f RC |
195 | |
196 | /* also cleanup dangling references to the connector: */ | |
197 | for (i = 0; i < fb_helper->crtc_count; i++) | |
198 | remove_from_modeset(&fb_helper->crtc_info[i].mode_set, connector); | |
199 | ||
65c2a89c DA |
200 | return 0; |
201 | } | |
202 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); | |
203 | ||
99231028 JW |
204 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
205 | { | |
206 | uint16_t *r_base, *g_base, *b_base; | |
207 | int i; | |
208 | ||
04c0c569 VS |
209 | if (helper->funcs->gamma_get == NULL) |
210 | return; | |
211 | ||
99231028 JW |
212 | r_base = crtc->gamma_store; |
213 | g_base = r_base + crtc->gamma_size; | |
214 | b_base = g_base + crtc->gamma_size; | |
215 | ||
216 | for (i = 0; i < crtc->gamma_size; i++) | |
217 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
218 | } | |
219 | ||
220 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
221 | { | |
222 | uint16_t *r_base, *g_base, *b_base; | |
223 | ||
ebe0f244 LP |
224 | if (crtc->funcs->gamma_set == NULL) |
225 | return; | |
226 | ||
99231028 JW |
227 | r_base = crtc->gamma_store; |
228 | g_base = r_base + crtc->gamma_size; | |
229 | b_base = g_base + crtc->gamma_size; | |
230 | ||
231 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); | |
232 | } | |
233 | ||
207fd329 DV |
234 | /** |
235 | * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter | |
236 | * @info: fbdev registered by the helper | |
237 | */ | |
1a7aba7f JB |
238 | int drm_fb_helper_debug_enter(struct fb_info *info) |
239 | { | |
240 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 241 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
242 | int i; |
243 | ||
1a7aba7f JB |
244 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
245 | for (i = 0; i < helper->crtc_count; i++) { | |
246 | struct drm_mode_set *mode_set = | |
247 | &helper->crtc_info[i].mode_set; | |
248 | ||
249 | if (!mode_set->crtc->enabled) | |
250 | continue; | |
251 | ||
252 | funcs = mode_set->crtc->helper_private; | |
99231028 | 253 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
254 | funcs->mode_set_base_atomic(mode_set->crtc, |
255 | mode_set->fb, | |
256 | mode_set->x, | |
413d45d3 | 257 | mode_set->y, |
21c74a8e | 258 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
259 | } |
260 | } | |
261 | ||
262 | return 0; | |
263 | } | |
264 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
265 | ||
266 | /* Find the real fb for a given fb helper CRTC */ | |
267 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
268 | { | |
269 | struct drm_device *dev = crtc->dev; | |
270 | struct drm_crtc *c; | |
271 | ||
272 | list_for_each_entry(c, &dev->mode_config.crtc_list, head) { | |
273 | if (crtc->base.id == c->base.id) | |
f4510a27 | 274 | return c->primary->fb; |
1a7aba7f JB |
275 | } |
276 | ||
277 | return NULL; | |
278 | } | |
279 | ||
207fd329 DV |
280 | /** |
281 | * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave | |
282 | * @info: fbdev registered by the helper | |
283 | */ | |
1a7aba7f JB |
284 | int drm_fb_helper_debug_leave(struct fb_info *info) |
285 | { | |
286 | struct drm_fb_helper *helper = info->par; | |
287 | struct drm_crtc *crtc; | |
be26a66d | 288 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
289 | struct drm_framebuffer *fb; |
290 | int i; | |
291 | ||
292 | for (i = 0; i < helper->crtc_count; i++) { | |
293 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
294 | crtc = mode_set->crtc; | |
295 | funcs = crtc->helper_private; | |
296 | fb = drm_mode_config_fb(crtc); | |
297 | ||
298 | if (!crtc->enabled) | |
299 | continue; | |
300 | ||
301 | if (!fb) { | |
302 | DRM_ERROR("no fb to restore??\n"); | |
303 | continue; | |
304 | } | |
305 | ||
99231028 | 306 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 307 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 308 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
309 | } |
310 | ||
311 | return 0; | |
312 | } | |
313 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
314 | ||
5ea1f752 | 315 | static bool restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 316 | { |
3858bc5d VS |
317 | struct drm_device *dev = fb_helper->dev; |
318 | struct drm_plane *plane; | |
e8e7a2b8 | 319 | bool error = false; |
3858bc5d VS |
320 | int i; |
321 | ||
322 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 323 | |
9783de20 | 324 | list_for_each_entry(plane, &dev->mode_config.plane_list, head) { |
e27dde3e MR |
325 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
326 | drm_plane_force_disable(plane); | |
6aed8ec3 | 327 | |
9783de20 | 328 | if (dev->mode_config.rotation_property) { |
3a5f87c2 TW |
329 | drm_mode_plane_set_obj_prop(plane, |
330 | dev->mode_config.rotation_property, | |
331 | BIT(DRM_ROTATE_0)); | |
9783de20 SJ |
332 | } |
333 | } | |
334 | ||
e8e7a2b8 DA |
335 | for (i = 0; i < fb_helper->crtc_count; i++) { |
336 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
337 | struct drm_crtc *crtc = mode_set->crtc; |
338 | int ret; | |
339 | ||
340 | if (crtc->funcs->cursor_set) { | |
341 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); | |
342 | if (ret) | |
343 | error = true; | |
344 | } | |
345 | ||
2d13b679 | 346 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 DA |
347 | if (ret) |
348 | error = true; | |
349 | } | |
350 | return error; | |
351 | } | |
5ea1f752 RC |
352 | /** |
353 | * drm_fb_helper_restore_fbdev_mode - restore fbdev configuration | |
354 | * @fb_helper: fbcon to restore | |
355 | * | |
356 | * This should be called from driver's drm ->lastclose callback | |
357 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
358 | * the user isn't greeted with a black screen when e.g. X dies. | |
359 | * | |
360 | * Use this variant if you need to bypass locking (panic), or already | |
361 | * hold all modeset locks. Otherwise use drm_fb_helper_restore_fbdev_mode_unlocked() | |
362 | */ | |
363 | static bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) | |
364 | { | |
365 | return restore_fbdev_mode(fb_helper); | |
366 | } | |
367 | ||
368 | /** | |
369 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
370 | * @fb_helper: fbcon to restore | |
371 | * | |
372 | * This should be called from driver's drm ->lastclose callback | |
373 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
374 | * the user isn't greeted with a black screen when e.g. X dies. | |
375 | */ | |
376 | bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) | |
377 | { | |
378 | struct drm_device *dev = fb_helper->dev; | |
379 | bool ret; | |
e2809c7d DA |
380 | bool do_delayed = false; |
381 | ||
5ea1f752 RC |
382 | drm_modeset_lock_all(dev); |
383 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
384 | |
385 | do_delayed = fb_helper->delayed_hotplug; | |
386 | if (do_delayed) | |
387 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 388 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
389 | |
390 | if (do_delayed) | |
391 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
392 | return ret; |
393 | } | |
394 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 395 | |
d21bf469 DV |
396 | /* |
397 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
398 | * and panic handling. | |
399 | */ | |
78b9c353 | 400 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 401 | { |
785b93ef DA |
402 | bool ret, error = false; |
403 | struct drm_fb_helper *helper; | |
404 | ||
405 | if (list_empty(&kernel_fb_helper_list)) | |
406 | return false; | |
407 | ||
408 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
409 | struct drm_device *dev = helper->dev; |
410 | ||
411 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
412 | continue; | |
413 | ||
cb597bb3 DV |
414 | /* |
415 | * NOTE: Use trylock mode to avoid deadlocks and sleeping in | |
416 | * panic context. | |
51fd371b | 417 | */ |
cb597bb3 | 418 | if (__drm_modeset_lock_all(dev, true) != 0) { |
b77f0765 | 419 | error = true; |
e8e7a2b8 | 420 | continue; |
b77f0765 | 421 | } |
e8e7a2b8 DA |
422 | |
423 | ret = drm_fb_helper_restore_fbdev_mode(helper); | |
424 | if (ret) | |
425 | error = true; | |
b77f0765 | 426 | |
cb597bb3 | 427 | drm_modeset_unlock_all(dev); |
785b93ef DA |
428 | } |
429 | return error; | |
430 | } | |
431 | ||
43c8a849 | 432 | static int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, |
785b93ef DA |
433 | void *panic_str) |
434 | { | |
d68752cf HD |
435 | /* |
436 | * It's a waste of time and effort to switch back to text console | |
437 | * if the kernel should reboot before panic messages can be seen. | |
438 | */ | |
439 | if (panic_timeout < 0) | |
440 | return 0; | |
441 | ||
d56b1b9d | 442 | pr_err("panic occurred, switching back to text console\n"); |
785b93ef | 443 | return drm_fb_helper_force_kernel_mode(); |
785b93ef | 444 | } |
785b93ef DA |
445 | |
446 | static struct notifier_block paniced = { | |
447 | .notifier_call = drm_fb_helper_panic, | |
448 | }; | |
449 | ||
20c60c35 DV |
450 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
451 | { | |
452 | struct drm_device *dev = fb_helper->dev; | |
453 | struct drm_crtc *crtc; | |
454 | int bound = 0, crtcs_bound = 0; | |
455 | ||
520edd13 PZ |
456 | /* Sometimes user space wants everything disabled, so don't steal the |
457 | * display if there's a master. */ | |
458 | if (dev->primary->master) | |
459 | return false; | |
460 | ||
20c60c35 | 461 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
f4510a27 | 462 | if (crtc->primary->fb) |
20c60c35 | 463 | crtcs_bound++; |
f4510a27 | 464 | if (crtc->primary->fb == fb_helper->fb) |
20c60c35 DV |
465 | bound++; |
466 | } | |
467 | ||
468 | if (bound < crtcs_bound) | |
469 | return false; | |
520edd13 | 470 | |
20c60c35 DV |
471 | return true; |
472 | } | |
473 | ||
bea1d35b | 474 | #ifdef CONFIG_MAGIC_SYSRQ |
785b93ef DA |
475 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
476 | { | |
d21bf469 DV |
477 | bool ret; |
478 | ret = drm_fb_helper_force_kernel_mode(); | |
479 | if (ret == true) | |
480 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
481 | } |
482 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
483 | ||
1495cc9d | 484 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
485 | { |
486 | schedule_work(&drm_fb_helper_restore_work); | |
487 | } | |
488 | ||
489 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
490 | .handler = drm_fb_helper_sysrq, | |
491 | .help_msg = "force-fb(V)", | |
492 | .action_msg = "Restore framebuffer console", | |
493 | }; | |
b8c40d62 RD |
494 | #else |
495 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 496 | #endif |
785b93ef | 497 | |
3a8148c5 | 498 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
499 | { |
500 | struct drm_fb_helper *fb_helper = info->par; | |
501 | struct drm_device *dev = fb_helper->dev; | |
502 | struct drm_crtc *crtc; | |
023eb571 | 503 | struct drm_connector *connector; |
023eb571 | 504 | int i, j; |
785b93ef | 505 | |
928c2f0c DV |
506 | /* |
507 | * fbdev->blank can be called from irq context in case of a panic. | |
1b1d5397 DV |
508 | * Since we already have our own special panic handler which will |
509 | * restore the fbdev console mode completely, just bail out early. | |
510 | */ | |
511 | if (oops_in_progress) | |
512 | return; | |
513 | ||
785b93ef | 514 | /* |
3a8148c5 | 515 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 516 | */ |
84849903 | 517 | drm_modeset_lock_all(dev); |
20c60c35 DV |
518 | if (!drm_fb_helper_is_bound(fb_helper)) { |
519 | drm_modeset_unlock_all(dev); | |
520 | return; | |
521 | } | |
522 | ||
e87b2c42 | 523 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 524 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 525 | |
8be48d92 DA |
526 | if (!crtc->enabled) |
527 | continue; | |
528 | ||
3a8148c5 | 529 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
530 | for (j = 0; j < fb_helper->connector_count; j++) { |
531 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 532 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 533 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 534 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 535 | } |
785b93ef | 536 | } |
84849903 | 537 | drm_modeset_unlock_all(dev); |
785b93ef DA |
538 | } |
539 | ||
207fd329 DV |
540 | /** |
541 | * drm_fb_helper_blank - implementation for ->fb_blank | |
542 | * @blank: desired blanking state | |
543 | * @info: fbdev registered by the helper | |
544 | */ | |
785b93ef DA |
545 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
546 | { | |
547 | switch (blank) { | |
731b5a15 | 548 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 549 | case FB_BLANK_UNBLANK: |
3a8148c5 | 550 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 551 | break; |
731b5a15 | 552 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 553 | case FB_BLANK_NORMAL: |
3a8148c5 | 554 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 555 | break; |
731b5a15 | 556 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 557 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 558 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 559 | break; |
731b5a15 | 560 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 561 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 562 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 563 | break; |
731b5a15 | 564 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 565 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 566 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
567 | break; |
568 | } | |
569 | return 0; | |
570 | } | |
571 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
572 | ||
573 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
574 | { | |
575 | int i; | |
576 | ||
0b4c0f3f DA |
577 | for (i = 0; i < helper->connector_count; i++) |
578 | kfree(helper->connector_info[i]); | |
579 | kfree(helper->connector_info); | |
a1b7736d | 580 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 581 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
582 | if (helper->crtc_info[i].mode_set.mode) |
583 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
584 | } | |
785b93ef DA |
585 | kfree(helper->crtc_info); |
586 | } | |
587 | ||
10a23102 TR |
588 | /** |
589 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
590 | * @dev: DRM device | |
591 | * @helper: driver-allocated fbdev helper structure to set up | |
592 | * @funcs: pointer to structure of functions associate with this helper | |
593 | * | |
594 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
595 | * useful to implement race-free initialization of the polling helpers. | |
596 | */ | |
597 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
598 | const struct drm_fb_helper_funcs *funcs) | |
599 | { | |
600 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
601 | helper->funcs = funcs; | |
602 | helper->dev = dev; | |
603 | } | |
604 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
605 | ||
207fd329 DV |
606 | /** |
607 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
608 | * @dev: drm device | |
609 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
610 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
611 | * @max_conn_count: max connector count | |
612 | * | |
613 | * This allocates the structures for the fbdev helper with the given limits. | |
614 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
615 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
616 | * to allow driver writes more control over the exact init sequence. | |
617 | * | |
10a23102 | 618 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
619 | * |
620 | * RETURNS: | |
621 | * Zero if everything went ok, nonzero otherwise. | |
622 | */ | |
4abe3520 DA |
623 | int drm_fb_helper_init(struct drm_device *dev, |
624 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 625 | int crtc_count, int max_conn_count) |
785b93ef | 626 | { |
785b93ef | 627 | struct drm_crtc *crtc; |
785b93ef DA |
628 | int i; |
629 | ||
04cfe97e XL |
630 | if (!max_conn_count) |
631 | return -EINVAL; | |
632 | ||
4abe3520 DA |
633 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
634 | if (!fb_helper->crtc_info) | |
785b93ef DA |
635 | return -ENOMEM; |
636 | ||
4abe3520 DA |
637 | fb_helper->crtc_count = crtc_count; |
638 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
639 | if (!fb_helper->connector_info) { | |
640 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
641 | return -ENOMEM; |
642 | } | |
65c2a89c | 643 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 644 | fb_helper->connector_count = 0; |
785b93ef DA |
645 | |
646 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 647 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
648 | kcalloc(max_conn_count, |
649 | sizeof(struct drm_connector *), | |
650 | GFP_KERNEL); | |
651 | ||
4a1b0714 | 652 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 653 | goto out_free; |
4abe3520 | 654 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
655 | } |
656 | ||
657 | i = 0; | |
658 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
4abe3520 | 659 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
660 | i++; |
661 | } | |
e9ad3181 | 662 | |
785b93ef DA |
663 | return 0; |
664 | out_free: | |
4abe3520 | 665 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
666 | return -ENOMEM; |
667 | } | |
4abe3520 DA |
668 | EXPORT_SYMBOL(drm_fb_helper_init); |
669 | ||
670 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) | |
671 | { | |
672 | if (!list_empty(&fb_helper->kernel_fb_list)) { | |
673 | list_del(&fb_helper->kernel_fb_list); | |
674 | if (list_empty(&kernel_fb_helper_list)) { | |
d56b1b9d | 675 | pr_info("drm: unregistered panic notifier\n"); |
4abe3520 DA |
676 | atomic_notifier_chain_unregister(&panic_notifier_list, |
677 | &paniced); | |
678 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
679 | } | |
680 | } | |
681 | ||
682 | drm_fb_helper_crtc_free(fb_helper); | |
683 | ||
4abe3520 DA |
684 | } |
685 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 686 | |
c850cb78 | 687 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
688 | u16 blue, u16 regno, struct fb_info *info) |
689 | { | |
690 | struct drm_fb_helper *fb_helper = info->par; | |
691 | struct drm_framebuffer *fb = fb_helper->fb; | |
692 | int pindex; | |
693 | ||
c850cb78 DA |
694 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
695 | u32 *palette; | |
696 | u32 value; | |
697 | /* place color in psuedopalette */ | |
698 | if (regno > 16) | |
699 | return -EINVAL; | |
700 | palette = (u32 *)info->pseudo_palette; | |
701 | red >>= (16 - info->var.red.length); | |
702 | green >>= (16 - info->var.green.length); | |
703 | blue >>= (16 - info->var.blue.length); | |
704 | value = (red << info->var.red.offset) | | |
705 | (green << info->var.green.offset) | | |
706 | (blue << info->var.blue.offset); | |
9da12b6a RC |
707 | if (info->var.transp.length > 0) { |
708 | u32 mask = (1 << info->var.transp.length) - 1; | |
709 | mask <<= info->var.transp.offset; | |
710 | value |= mask; | |
711 | } | |
c850cb78 DA |
712 | palette[regno] = value; |
713 | return 0; | |
714 | } | |
715 | ||
04c0c569 VS |
716 | /* |
717 | * The driver really shouldn't advertise pseudo/directcolor | |
718 | * visuals if it can't deal with the palette. | |
719 | */ | |
720 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
721 | !fb_helper->funcs->gamma_get)) | |
722 | return -EINVAL; | |
723 | ||
b8c00ac5 DA |
724 | pindex = regno; |
725 | ||
726 | if (fb->bits_per_pixel == 16) { | |
727 | pindex = regno << 3; | |
728 | ||
729 | if (fb->depth == 16 && regno > 63) | |
c850cb78 | 730 | return -EINVAL; |
b8c00ac5 | 731 | if (fb->depth == 15 && regno > 31) |
c850cb78 | 732 | return -EINVAL; |
b8c00ac5 DA |
733 | |
734 | if (fb->depth == 16) { | |
735 | u16 r, g, b; | |
736 | int i; | |
737 | if (regno < 32) { | |
738 | for (i = 0; i < 8; i++) | |
739 | fb_helper->funcs->gamma_set(crtc, red, | |
740 | green, blue, pindex + i); | |
741 | } | |
742 | ||
743 | fb_helper->funcs->gamma_get(crtc, &r, | |
744 | &g, &b, | |
745 | pindex >> 1); | |
746 | ||
747 | for (i = 0; i < 4; i++) | |
748 | fb_helper->funcs->gamma_set(crtc, r, | |
749 | green, b, | |
750 | (pindex >> 1) + i); | |
751 | } | |
752 | } | |
753 | ||
754 | if (fb->depth != 16) | |
755 | fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); | |
c850cb78 | 756 | return 0; |
b8c00ac5 DA |
757 | } |
758 | ||
207fd329 DV |
759 | /** |
760 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
761 | * @cmap: cmap to set | |
762 | * @info: fbdev registered by the helper | |
763 | */ | |
068143d3 DA |
764 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
765 | { | |
766 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 767 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 768 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
769 | u16 *red, *green, *blue, *transp; |
770 | struct drm_crtc *crtc; | |
062ac622 | 771 | int i, j, rc = 0; |
068143d3 DA |
772 | int start; |
773 | ||
9aa609e1 RW |
774 | if (__drm_modeset_lock_all(dev, !!oops_in_progress)) { |
775 | return -EBUSY; | |
776 | } | |
8391a3d5 VS |
777 | if (!drm_fb_helper_is_bound(fb_helper)) { |
778 | drm_modeset_unlock_all(dev); | |
779 | return -EBUSY; | |
780 | } | |
781 | ||
8be48d92 DA |
782 | for (i = 0; i < fb_helper->crtc_count; i++) { |
783 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
784 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
785 | |
786 | red = cmap->red; | |
787 | green = cmap->green; | |
788 | blue = cmap->blue; | |
789 | transp = cmap->transp; | |
790 | start = cmap->start; | |
791 | ||
062ac622 | 792 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
793 | u16 hred, hgreen, hblue, htransp = 0xffff; |
794 | ||
795 | hred = *red++; | |
796 | hgreen = *green++; | |
797 | hblue = *blue++; | |
798 | ||
799 | if (transp) | |
800 | htransp = *transp++; | |
801 | ||
c850cb78 DA |
802 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
803 | if (rc) | |
8391a3d5 | 804 | goto out; |
068143d3 | 805 | } |
04c0c569 VS |
806 | if (crtc_funcs->load_lut) |
807 | crtc_funcs->load_lut(crtc); | |
068143d3 | 808 | } |
8391a3d5 VS |
809 | out: |
810 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
811 | return rc; |
812 | } | |
813 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
814 | ||
207fd329 DV |
815 | /** |
816 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
817 | * @var: screeninfo to check | |
818 | * @info: fbdev registered by the helper | |
819 | */ | |
785b93ef DA |
820 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
821 | struct fb_info *info) | |
822 | { | |
823 | struct drm_fb_helper *fb_helper = info->par; | |
824 | struct drm_framebuffer *fb = fb_helper->fb; | |
825 | int depth; | |
826 | ||
f90ebd9e | 827 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
828 | return -EINVAL; |
829 | ||
830 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
831 | if (var->bits_per_pixel > fb->bits_per_pixel || |
832 | var->xres > fb->width || var->yres > fb->height || | |
833 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 834 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
835 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
836 | var->xres, var->yres, var->bits_per_pixel, | |
837 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 838 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
839 | return -EINVAL; |
840 | } | |
841 | ||
842 | switch (var->bits_per_pixel) { | |
843 | case 16: | |
844 | depth = (var->green.length == 6) ? 16 : 15; | |
845 | break; | |
846 | case 32: | |
847 | depth = (var->transp.length > 0) ? 32 : 24; | |
848 | break; | |
849 | default: | |
850 | depth = var->bits_per_pixel; | |
851 | break; | |
852 | } | |
853 | ||
854 | switch (depth) { | |
855 | case 8: | |
856 | var->red.offset = 0; | |
857 | var->green.offset = 0; | |
858 | var->blue.offset = 0; | |
859 | var->red.length = 8; | |
860 | var->green.length = 8; | |
861 | var->blue.length = 8; | |
862 | var->transp.length = 0; | |
863 | var->transp.offset = 0; | |
864 | break; | |
865 | case 15: | |
866 | var->red.offset = 10; | |
867 | var->green.offset = 5; | |
868 | var->blue.offset = 0; | |
869 | var->red.length = 5; | |
870 | var->green.length = 5; | |
871 | var->blue.length = 5; | |
872 | var->transp.length = 1; | |
873 | var->transp.offset = 15; | |
874 | break; | |
875 | case 16: | |
876 | var->red.offset = 11; | |
877 | var->green.offset = 5; | |
878 | var->blue.offset = 0; | |
879 | var->red.length = 5; | |
880 | var->green.length = 6; | |
881 | var->blue.length = 5; | |
882 | var->transp.length = 0; | |
883 | var->transp.offset = 0; | |
884 | break; | |
885 | case 24: | |
886 | var->red.offset = 16; | |
887 | var->green.offset = 8; | |
888 | var->blue.offset = 0; | |
889 | var->red.length = 8; | |
890 | var->green.length = 8; | |
891 | var->blue.length = 8; | |
892 | var->transp.length = 0; | |
893 | var->transp.offset = 0; | |
894 | break; | |
895 | case 32: | |
896 | var->red.offset = 16; | |
897 | var->green.offset = 8; | |
898 | var->blue.offset = 0; | |
899 | var->red.length = 8; | |
900 | var->green.length = 8; | |
901 | var->blue.length = 8; | |
902 | var->transp.length = 8; | |
903 | var->transp.offset = 24; | |
904 | break; | |
905 | default: | |
906 | return -EINVAL; | |
907 | } | |
908 | return 0; | |
909 | } | |
910 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
911 | ||
207fd329 DV |
912 | /** |
913 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
914 | * @info: fbdev registered by the helper | |
915 | * | |
916 | * This will let fbcon do the mode init and is called at initialization time by | |
917 | * the fbdev core when registering the driver, and later on through the hotplug | |
918 | * callback. | |
919 | */ | |
785b93ef DA |
920 | int drm_fb_helper_set_par(struct fb_info *info) |
921 | { | |
922 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 923 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 924 | |
5349ef31 | 925 | if (var->pixclock != 0) { |
172e91f5 | 926 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
927 | return -EINVAL; |
928 | } | |
929 | ||
5ea1f752 | 930 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 931 | |
785b93ef DA |
932 | return 0; |
933 | } | |
934 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
935 | ||
207fd329 DV |
936 | /** |
937 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
938 | * @var: updated screen information | |
939 | * @info: fbdev registered by the helper | |
940 | */ | |
785b93ef DA |
941 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
942 | struct fb_info *info) | |
943 | { | |
944 | struct drm_fb_helper *fb_helper = info->par; | |
945 | struct drm_device *dev = fb_helper->dev; | |
946 | struct drm_mode_set *modeset; | |
785b93ef DA |
947 | int ret = 0; |
948 | int i; | |
949 | ||
9aa609e1 RW |
950 | if (__drm_modeset_lock_all(dev, !!oops_in_progress)) { |
951 | return -EBUSY; | |
952 | } | |
20c60c35 DV |
953 | if (!drm_fb_helper_is_bound(fb_helper)) { |
954 | drm_modeset_unlock_all(dev); | |
955 | return -EBUSY; | |
956 | } | |
957 | ||
8be48d92 | 958 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
959 | modeset = &fb_helper->crtc_info[i].mode_set; |
960 | ||
961 | modeset->x = var->xoffset; | |
962 | modeset->y = var->yoffset; | |
963 | ||
964 | if (modeset->num_connectors) { | |
2d13b679 | 965 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
966 | if (!ret) { |
967 | info->var.xoffset = var->xoffset; | |
968 | info->var.yoffset = var->yoffset; | |
969 | } | |
970 | } | |
971 | } | |
84849903 | 972 | drm_modeset_unlock_all(dev); |
785b93ef DA |
973 | return ret; |
974 | } | |
975 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
976 | ||
8acf658a | 977 | /* |
207fd329 DV |
978 | * Allocates the backing storage and sets up the fbdev info structure through |
979 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
980 | * notifier. | |
8acf658a | 981 | */ |
de1ace5b DV |
982 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
983 | int preferred_bpp) | |
785b93ef | 984 | { |
8acf658a | 985 | int ret = 0; |
785b93ef | 986 | int crtc_count = 0; |
4abe3520 | 987 | int i; |
785b93ef | 988 | struct fb_info *info; |
38651674 | 989 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 990 | int gamma_size = 0; |
38651674 DA |
991 | |
992 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
993 | sizes.surface_depth = 24; | |
994 | sizes.surface_bpp = 32; | |
995 | sizes.fb_width = (unsigned)-1; | |
996 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 997 | |
b8c00ac5 DA |
998 | /* if driver picks 8 or 16 by default use that |
999 | for both depth/bpp */ | |
96081cdf | 1000 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1001 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1002 | |
785b93ef | 1003 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
1004 | for (i = 0; i < fb_helper->connector_count; i++) { |
1005 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 1006 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1007 | |
eaf99c74 | 1008 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1009 | |
1010 | if (cmdline_mode->bpp_specified) { | |
1011 | switch (cmdline_mode->bpp) { | |
1012 | case 8: | |
38651674 | 1013 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1014 | break; |
1015 | case 15: | |
38651674 DA |
1016 | sizes.surface_depth = 15; |
1017 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1018 | break; |
1019 | case 16: | |
38651674 | 1020 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1021 | break; |
1022 | case 24: | |
38651674 | 1023 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1024 | break; |
1025 | case 32: | |
38651674 DA |
1026 | sizes.surface_depth = 24; |
1027 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1028 | break; |
1029 | } | |
1030 | break; | |
1031 | } | |
1032 | } | |
1033 | ||
8be48d92 DA |
1034 | crtc_count = 0; |
1035 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1036 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1037 | struct drm_mode_set *mode_set; |
1038 | int x, y, j; | |
1039 | /* in case of tile group, are we the last tile vert or horiz? | |
1040 | * If no tile group you are always the last one both vertically | |
1041 | * and horizontally | |
1042 | */ | |
1043 | bool lastv = true, lasth = true; | |
675c8328 | 1044 | |
8be48d92 | 1045 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1046 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1047 | |
1048 | if (!desired_mode) | |
1049 | continue; | |
1050 | ||
1051 | crtc_count++; | |
1052 | ||
b0ee9e7f DA |
1053 | x = fb_helper->crtc_info[i].x; |
1054 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1055 | |
1056 | if (gamma_size == 0) | |
1057 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1058 | ||
1059 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1060 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1061 | |
1062 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1063 | struct drm_connector *connector = mode_set->connectors[j]; | |
1064 | if (connector->has_tile) { | |
1065 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1066 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1067 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1068 | break; | |
1069 | } | |
1070 | } | |
1071 | ||
1072 | if (lasth) | |
1073 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1074 | if (lastv) | |
1075 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1076 | } |
1077 | ||
38651674 | 1078 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1079 | /* hmm everyone went away - assume VGA cable just fell out |
1080 | and will come back later. */ | |
eb1f8e4f | 1081 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1082 | sizes.fb_width = sizes.surface_width = 1024; |
1083 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1084 | } |
1085 | ||
38651674 | 1086 | /* push down into drivers */ |
8acf658a DV |
1087 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1088 | if (ret < 0) | |
1089 | return ret; | |
785b93ef | 1090 | |
38651674 | 1091 | info = fb_helper->fbdev; |
785b93ef | 1092 | |
7e53f3a4 DV |
1093 | /* |
1094 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1095 | * events, but at init time drm_setup_crtcs needs to be called before | |
1096 | * the fb is allocated (since we need to figure out the desired size of | |
1097 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1098 | * here again. | |
1099 | */ | |
96081cdf | 1100 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1101 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1102 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1103 | ||
785b93ef | 1104 | |
8acf658a DV |
1105 | info->var.pixclock = 0; |
1106 | if (register_framebuffer(info) < 0) | |
1107 | return -EINVAL; | |
38651674 | 1108 | |
8acf658a DV |
1109 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1110 | info->node, info->fix.id); | |
785b93ef DA |
1111 | |
1112 | /* Switch back to kernel console on panic */ | |
1113 | /* multi card linked list maybe */ | |
1114 | if (list_empty(&kernel_fb_helper_list)) { | |
d56b1b9d | 1115 | dev_info(fb_helper->dev->dev, "registered panic notifier\n"); |
785b93ef DA |
1116 | atomic_notifier_chain_register(&panic_notifier_list, |
1117 | &paniced); | |
1118 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
1119 | } | |
8acf658a DV |
1120 | |
1121 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1122 | |
785b93ef DA |
1123 | return 0; |
1124 | } | |
785b93ef | 1125 | |
207fd329 DV |
1126 | /** |
1127 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1128 | * @info: fbdev registered by the helper | |
1129 | * @pitch: desired pitch | |
1130 | * @depth: desired depth | |
1131 | * | |
1132 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1133 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1134 | * additional constraints need to set up their own limits. | |
1135 | * | |
1136 | * Drivers should call this (or their equivalent setup code) from their | |
1137 | * ->fb_probe callback. | |
1138 | */ | |
3632ef89 DA |
1139 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1140 | uint32_t depth) | |
1141 | { | |
1142 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1143 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1144 | FB_VISUAL_TRUECOLOR; | |
1145 | info->fix.mmio_start = 0; | |
1146 | info->fix.mmio_len = 0; | |
1147 | info->fix.type_aux = 0; | |
1148 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1149 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1150 | info->fix.ywrapstep = 0; | |
1151 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1152 | |
1153 | info->fix.line_length = pitch; | |
1154 | return; | |
1155 | } | |
1156 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1157 | ||
207fd329 DV |
1158 | /** |
1159 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1160 | * @info: fbdev instance to set up | |
1161 | * @fb_helper: fb helper instance to use as template | |
1162 | * @fb_width: desired fb width | |
1163 | * @fb_height: desired fb height | |
1164 | * | |
1165 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1166 | * and the drm framebuffer allocated in fb_helper->fb. | |
1167 | * | |
1168 | * Drivers should call this (or their equivalent setup code) from their | |
1169 | * ->fb_probe callback after having allocated the fbdev backing | |
1170 | * storage framebuffer. | |
1171 | */ | |
38651674 | 1172 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1173 | uint32_t fb_width, uint32_t fb_height) |
1174 | { | |
38651674 DA |
1175 | struct drm_framebuffer *fb = fb_helper->fb; |
1176 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1177 | info->var.xres_virtual = fb->width; |
1178 | info->var.yres_virtual = fb->height; | |
1179 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1180 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1181 | info->var.xoffset = 0; |
1182 | info->var.yoffset = 0; | |
1183 | info->var.activate = FB_ACTIVATE_NOW; | |
1184 | info->var.height = -1; | |
1185 | info->var.width = -1; | |
1186 | ||
1187 | switch (fb->depth) { | |
1188 | case 8: | |
1189 | info->var.red.offset = 0; | |
1190 | info->var.green.offset = 0; | |
1191 | info->var.blue.offset = 0; | |
1192 | info->var.red.length = 8; /* 8bit DAC */ | |
1193 | info->var.green.length = 8; | |
1194 | info->var.blue.length = 8; | |
1195 | info->var.transp.offset = 0; | |
1196 | info->var.transp.length = 0; | |
1197 | break; | |
1198 | case 15: | |
1199 | info->var.red.offset = 10; | |
1200 | info->var.green.offset = 5; | |
1201 | info->var.blue.offset = 0; | |
1202 | info->var.red.length = 5; | |
1203 | info->var.green.length = 5; | |
1204 | info->var.blue.length = 5; | |
1205 | info->var.transp.offset = 15; | |
1206 | info->var.transp.length = 1; | |
1207 | break; | |
1208 | case 16: | |
1209 | info->var.red.offset = 11; | |
1210 | info->var.green.offset = 5; | |
1211 | info->var.blue.offset = 0; | |
1212 | info->var.red.length = 5; | |
1213 | info->var.green.length = 6; | |
1214 | info->var.blue.length = 5; | |
1215 | info->var.transp.offset = 0; | |
1216 | break; | |
1217 | case 24: | |
1218 | info->var.red.offset = 16; | |
1219 | info->var.green.offset = 8; | |
1220 | info->var.blue.offset = 0; | |
1221 | info->var.red.length = 8; | |
1222 | info->var.green.length = 8; | |
1223 | info->var.blue.length = 8; | |
1224 | info->var.transp.offset = 0; | |
1225 | info->var.transp.length = 0; | |
1226 | break; | |
1227 | case 32: | |
1228 | info->var.red.offset = 16; | |
1229 | info->var.green.offset = 8; | |
1230 | info->var.blue.offset = 0; | |
1231 | info->var.red.length = 8; | |
1232 | info->var.green.length = 8; | |
1233 | info->var.blue.length = 8; | |
1234 | info->var.transp.offset = 24; | |
1235 | info->var.transp.length = 8; | |
1236 | break; | |
1237 | default: | |
1238 | break; | |
1239 | } | |
1240 | ||
1241 | info->var.xres = fb_width; | |
1242 | info->var.yres = fb_height; | |
1243 | } | |
1244 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1245 | |
0b4c0f3f DA |
1246 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1247 | uint32_t maxX, | |
1248 | uint32_t maxY) | |
38651674 DA |
1249 | { |
1250 | struct drm_connector *connector; | |
1251 | int count = 0; | |
0b4c0f3f | 1252 | int i; |
38651674 | 1253 | |
0b4c0f3f DA |
1254 | for (i = 0; i < fb_helper->connector_count; i++) { |
1255 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1256 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1257 | } | |
1258 | ||
1259 | return count; | |
1260 | } | |
1261 | ||
2f1046f3 | 1262 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1263 | { |
1264 | struct drm_display_mode *mode; | |
1265 | ||
0b4c0f3f | 1266 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1267 | if (mode->hdisplay > width || |
1268 | mode->vdisplay > height) | |
38651674 DA |
1269 | continue; |
1270 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1271 | return mode; | |
1272 | } | |
1273 | return NULL; | |
1274 | } | |
2f1046f3 | 1275 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1276 | |
0b4c0f3f | 1277 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1278 | { |
eaf99c74 | 1279 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1280 | } |
1281 | ||
2f1046f3 | 1282 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1283 | int width, int height) |
38651674 | 1284 | { |
1794d257 | 1285 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1286 | struct drm_display_mode *mode; |
c683f427 | 1287 | bool prefer_non_interlace; |
38651674 | 1288 | |
eaf99c74 | 1289 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1290 | if (cmdline_mode->specified == false) |
f3af5c7d | 1291 | return NULL; |
38651674 DA |
1292 | |
1293 | /* attempt to find a matching mode in the list of modes | |
1294 | * we have gotten so far, if not add a CVT mode that conforms | |
1295 | */ | |
1296 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1297 | goto create_mode; | |
1298 | ||
c683f427 | 1299 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1300 | again: |
0b4c0f3f | 1301 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1302 | /* check width/height */ |
1303 | if (mode->hdisplay != cmdline_mode->xres || | |
1304 | mode->vdisplay != cmdline_mode->yres) | |
1305 | continue; | |
1306 | ||
1307 | if (cmdline_mode->refresh_specified) { | |
1308 | if (mode->vrefresh != cmdline_mode->refresh) | |
1309 | continue; | |
1310 | } | |
1311 | ||
1312 | if (cmdline_mode->interlace) { | |
1313 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1314 | continue; | |
c683f427 TI |
1315 | } else if (prefer_non_interlace) { |
1316 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1317 | continue; | |
38651674 DA |
1318 | } |
1319 | return mode; | |
1320 | } | |
1321 | ||
c683f427 TI |
1322 | if (prefer_non_interlace) { |
1323 | prefer_non_interlace = false; | |
1324 | goto again; | |
1325 | } | |
1326 | ||
38651674 | 1327 | create_mode: |
1794d257 CW |
1328 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1329 | cmdline_mode); | |
0b4c0f3f | 1330 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1331 | return mode; |
1332 | } | |
2f1046f3 | 1333 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1334 | |
1335 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1336 | { | |
1337 | bool enable; | |
1338 | ||
96081cdf | 1339 | if (strict) |
38651674 | 1340 | enable = connector->status == connector_status_connected; |
96081cdf | 1341 | else |
38651674 | 1342 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1343 | |
38651674 DA |
1344 | return enable; |
1345 | } | |
1346 | ||
0b4c0f3f DA |
1347 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1348 | bool *enabled) | |
38651674 DA |
1349 | { |
1350 | bool any_enabled = false; | |
1351 | struct drm_connector *connector; | |
1352 | int i = 0; | |
1353 | ||
0b4c0f3f DA |
1354 | for (i = 0; i < fb_helper->connector_count; i++) { |
1355 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1356 | enabled[i] = drm_connector_enabled(connector, true); |
1357 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1358 | enabled[i] ? "yes" : "no"); | |
1359 | any_enabled |= enabled[i]; | |
38651674 DA |
1360 | } |
1361 | ||
1362 | if (any_enabled) | |
1363 | return; | |
1364 | ||
0b4c0f3f DA |
1365 | for (i = 0; i < fb_helper->connector_count; i++) { |
1366 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1367 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1368 | } |
1369 | } | |
1370 | ||
1d42bbc8 DA |
1371 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1372 | struct drm_display_mode **modes, | |
b0ee9e7f | 1373 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1374 | bool *enabled, int width, int height) |
1375 | { | |
1376 | int count, i, j; | |
1377 | bool can_clone = false; | |
1378 | struct drm_fb_helper_connector *fb_helper_conn; | |
1379 | struct drm_display_mode *dmt_mode, *mode; | |
1380 | ||
1381 | /* only contemplate cloning in the single crtc case */ | |
1382 | if (fb_helper->crtc_count > 1) | |
1383 | return false; | |
1384 | ||
1385 | count = 0; | |
1386 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1387 | if (enabled[i]) | |
1388 | count++; | |
1389 | } | |
1390 | ||
1391 | /* only contemplate cloning if more than one connector is enabled */ | |
1392 | if (count <= 1) | |
1393 | return false; | |
1394 | ||
1395 | /* check the command line or if nothing common pick 1024x768 */ | |
1396 | can_clone = true; | |
1397 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1398 | if (!enabled[i]) | |
1399 | continue; | |
1400 | fb_helper_conn = fb_helper->connector_info[i]; | |
1401 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1402 | if (!modes[i]) { | |
1403 | can_clone = false; | |
1404 | break; | |
1405 | } | |
1406 | for (j = 0; j < i; j++) { | |
1407 | if (!enabled[j]) | |
1408 | continue; | |
1409 | if (!drm_mode_equal(modes[j], modes[i])) | |
1410 | can_clone = false; | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | if (can_clone) { | |
1415 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1416 | return true; | |
1417 | } | |
1418 | ||
1419 | /* try and find a 1024x768 mode on each connector */ | |
1420 | can_clone = true; | |
f6e252ba | 1421 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1422 | |
1423 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1424 | ||
1425 | if (!enabled[i]) | |
1426 | continue; | |
1427 | ||
1428 | fb_helper_conn = fb_helper->connector_info[i]; | |
1429 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1430 | if (drm_mode_equal(mode, dmt_mode)) | |
1431 | modes[i] = mode; | |
1432 | } | |
1433 | if (!modes[i]) | |
1434 | can_clone = false; | |
1435 | } | |
1436 | ||
1437 | if (can_clone) { | |
1438 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1439 | return true; | |
1440 | } | |
1441 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1442 | return false; | |
1443 | } | |
1444 | ||
b0ee9e7f DA |
1445 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1446 | struct drm_display_mode **modes, | |
1447 | struct drm_fb_offset *offsets, | |
1448 | int idx, | |
1449 | int h_idx, int v_idx) | |
1450 | { | |
1451 | struct drm_fb_helper_connector *fb_helper_conn; | |
1452 | int i; | |
1453 | int hoffset = 0, voffset = 0; | |
1454 | ||
1455 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1456 | fb_helper_conn = fb_helper->connector_info[i]; | |
1457 | if (!fb_helper_conn->connector->has_tile) | |
1458 | continue; | |
1459 | ||
1460 | if (!modes[i] && (h_idx || v_idx)) { | |
1461 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
1462 | fb_helper_conn->connector->base.id); | |
1463 | continue; | |
1464 | } | |
1465 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
1466 | hoffset += modes[i]->hdisplay; | |
1467 | ||
1468 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
1469 | voffset += modes[i]->vdisplay; | |
1470 | } | |
1471 | offsets[idx].x = hoffset; | |
1472 | offsets[idx].y = voffset; | |
1473 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
1474 | return 0; | |
1475 | } | |
1476 | ||
0b4c0f3f | 1477 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 1478 | struct drm_display_mode **modes, |
b0ee9e7f | 1479 | struct drm_fb_offset *offsets, |
38651674 DA |
1480 | bool *enabled, int width, int height) |
1481 | { | |
0b4c0f3f DA |
1482 | struct drm_fb_helper_connector *fb_helper_conn; |
1483 | int i; | |
b0ee9e7f DA |
1484 | uint64_t conn_configured = 0, mask; |
1485 | int tile_pass = 0; | |
1486 | mask = (1 << fb_helper->connector_count) - 1; | |
1487 | retry: | |
0b4c0f3f DA |
1488 | for (i = 0; i < fb_helper->connector_count; i++) { |
1489 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1490 | |
b0ee9e7f DA |
1491 | if (conn_configured & (1 << i)) |
1492 | continue; | |
1493 | ||
1494 | if (enabled[i] == false) { | |
1495 | conn_configured |= (1 << i); | |
1496 | continue; | |
1497 | } | |
1498 | ||
1499 | /* first pass over all the untiled connectors */ | |
1500 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 1501 | continue; |
38651674 | 1502 | |
b0ee9e7f DA |
1503 | if (tile_pass == 1) { |
1504 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
1505 | fb_helper_conn->connector->tile_v_loc != 0) | |
1506 | continue; | |
1507 | ||
1508 | } else { | |
1509 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && | |
1510 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) | |
1511 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
1512 | continue; | |
1513 | ||
1514 | /* find the tile offsets for this pass - need | |
1515 | to find all tiles left and above */ | |
1516 | drm_get_tile_offsets(fb_helper, modes, offsets, | |
1517 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
1518 | } | |
38651674 | 1519 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 1520 | fb_helper_conn->connector->base.id); |
38651674 DA |
1521 | |
1522 | /* got for command line mode first */ | |
0b4c0f3f | 1523 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 | 1524 | if (!modes[i]) { |
b0ee9e7f DA |
1525 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
1526 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 1527 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
1528 | } |
1529 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1530 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1531 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1532 | break; |
1533 | } | |
1534 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1535 | "none"); | |
b0ee9e7f DA |
1536 | conn_configured |= (1 << i); |
1537 | } | |
1538 | ||
1539 | if ((conn_configured & mask) != mask) { | |
1540 | tile_pass++; | |
1541 | goto retry; | |
38651674 DA |
1542 | } |
1543 | return true; | |
1544 | } | |
1545 | ||
8be48d92 DA |
1546 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1547 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1548 | struct drm_display_mode **modes, |
1549 | int n, int width, int height) | |
1550 | { | |
1551 | int c, o; | |
8be48d92 | 1552 | struct drm_device *dev = fb_helper->dev; |
38651674 | 1553 | struct drm_connector *connector; |
be26a66d | 1554 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 1555 | struct drm_encoder *encoder; |
38651674 | 1556 | int my_score, best_score, score; |
8be48d92 | 1557 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 1558 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 1559 | |
0b4c0f3f | 1560 | if (n == fb_helper->connector_count) |
38651674 | 1561 | return 0; |
0b4c0f3f DA |
1562 | |
1563 | fb_helper_conn = fb_helper->connector_info[n]; | |
1564 | connector = fb_helper_conn->connector; | |
38651674 DA |
1565 | |
1566 | best_crtcs[n] = NULL; | |
8be48d92 | 1567 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
1568 | if (modes[n] == NULL) |
1569 | return best_score; | |
1570 | ||
8be48d92 DA |
1571 | crtcs = kzalloc(dev->mode_config.num_connector * |
1572 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); | |
38651674 DA |
1573 | if (!crtcs) |
1574 | return best_score; | |
1575 | ||
1576 | my_score = 1; | |
1577 | if (connector->status == connector_status_connected) | |
1578 | my_score++; | |
0b4c0f3f | 1579 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 1580 | my_score++; |
0b4c0f3f | 1581 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
1582 | my_score++; |
1583 | ||
1584 | connector_funcs = connector->helper_private; | |
1585 | encoder = connector_funcs->best_encoder(connector); | |
1586 | if (!encoder) | |
1587 | goto out; | |
1588 | ||
38651674 DA |
1589 | /* select a crtc for this connector and then attempt to configure |
1590 | remaining connectors */ | |
8be48d92 DA |
1591 | for (c = 0; c < fb_helper->crtc_count; c++) { |
1592 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 1593 | |
96081cdf | 1594 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 1595 | continue; |
38651674 DA |
1596 | |
1597 | for (o = 0; o < n; o++) | |
1598 | if (best_crtcs[o] == crtc) | |
1599 | break; | |
1600 | ||
1601 | if (o < n) { | |
1d42bbc8 DA |
1602 | /* ignore cloning unless only a single crtc */ |
1603 | if (fb_helper->crtc_count > 1) | |
1604 | continue; | |
1605 | ||
1606 | if (!drm_mode_equal(modes[o], modes[n])) | |
1607 | continue; | |
38651674 DA |
1608 | } |
1609 | ||
1610 | crtcs[n] = crtc; | |
8be48d92 DA |
1611 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
1612 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
1613 | width, height); |
1614 | if (score > best_score) { | |
38651674 DA |
1615 | best_score = score; |
1616 | memcpy(best_crtcs, crtcs, | |
1617 | dev->mode_config.num_connector * | |
8be48d92 | 1618 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 1619 | } |
38651674 DA |
1620 | } |
1621 | out: | |
1622 | kfree(crtcs); | |
1623 | return best_score; | |
1624 | } | |
1625 | ||
8be48d92 | 1626 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 1627 | { |
8be48d92 DA |
1628 | struct drm_device *dev = fb_helper->dev; |
1629 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 1630 | struct drm_display_mode **modes; |
b0ee9e7f | 1631 | struct drm_fb_offset *offsets; |
8be48d92 | 1632 | struct drm_mode_set *modeset; |
38651674 DA |
1633 | bool *enabled; |
1634 | int width, height; | |
11e17a08 | 1635 | int i; |
38651674 DA |
1636 | |
1637 | DRM_DEBUG_KMS("\n"); | |
1638 | ||
1639 | width = dev->mode_config.max_width; | |
1640 | height = dev->mode_config.max_height; | |
1641 | ||
38651674 | 1642 | crtcs = kcalloc(dev->mode_config.num_connector, |
8be48d92 | 1643 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
1644 | modes = kcalloc(dev->mode_config.num_connector, |
1645 | sizeof(struct drm_display_mode *), GFP_KERNEL); | |
b0ee9e7f DA |
1646 | offsets = kcalloc(dev->mode_config.num_connector, |
1647 | sizeof(struct drm_fb_offset), GFP_KERNEL); | |
38651674 DA |
1648 | enabled = kcalloc(dev->mode_config.num_connector, |
1649 | sizeof(bool), GFP_KERNEL); | |
b0ee9e7f | 1650 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
1651 | DRM_ERROR("Memory allocation failed\n"); |
1652 | goto out; | |
1653 | } | |
1654 | ||
38651674 | 1655 | |
0b4c0f3f | 1656 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 1657 | |
11e17a08 JB |
1658 | if (!(fb_helper->funcs->initial_config && |
1659 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 1660 | offsets, |
11e17a08 JB |
1661 | enabled, width, height))) { |
1662 | memset(modes, 0, dev->mode_config.num_connector*sizeof(modes[0])); | |
1663 | memset(crtcs, 0, dev->mode_config.num_connector*sizeof(crtcs[0])); | |
b0ee9e7f | 1664 | memset(offsets, 0, dev->mode_config.num_connector*sizeof(offsets[0])); |
11e17a08 | 1665 | |
b0ee9e7f DA |
1666 | if (!drm_target_cloned(fb_helper, modes, offsets, |
1667 | enabled, width, height) && | |
1668 | !drm_target_preferred(fb_helper, modes, offsets, | |
1669 | enabled, width, height)) | |
1d42bbc8 | 1670 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 1671 | |
11e17a08 JB |
1672 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
1673 | width, height); | |
38651674 | 1674 | |
11e17a08 JB |
1675 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
1676 | } | |
8be48d92 DA |
1677 | |
1678 | /* need to set the modesets up here for use later */ | |
1679 | /* fill out the connector<->crtc mappings into the modesets */ | |
1680 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1681 | modeset = &fb_helper->crtc_info[i].mode_set; | |
1682 | modeset->num_connectors = 0; | |
7e53f3a4 | 1683 | modeset->fb = NULL; |
8be48d92 | 1684 | } |
38651674 | 1685 | |
0b4c0f3f | 1686 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 1687 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 1688 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 1689 | struct drm_fb_offset *offset = &offsets[i]; |
8be48d92 | 1690 | modeset = &fb_crtc->mode_set; |
38651674 | 1691 | |
8be48d92 | 1692 | if (mode && fb_crtc) { |
b0ee9e7f DA |
1693 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
1694 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
8be48d92 | 1695 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
1696 | fb_crtc->x = offset->x; |
1697 | fb_crtc->y = offset->y; | |
8be48d92 DA |
1698 | if (modeset->mode) |
1699 | drm_mode_destroy(dev, modeset->mode); | |
1700 | modeset->mode = drm_mode_duplicate(dev, | |
1701 | fb_crtc->desired_mode); | |
0b4c0f3f | 1702 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 1703 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
1704 | modeset->x = offset->x; |
1705 | modeset->y = offset->y; | |
38651674 | 1706 | } |
38651674 DA |
1707 | } |
1708 | ||
7e53f3a4 DV |
1709 | /* Clear out any old modes if there are no more connected outputs. */ |
1710 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1711 | modeset = &fb_helper->crtc_info[i].mode_set; | |
1712 | if (modeset->num_connectors == 0) { | |
1713 | BUG_ON(modeset->fb); | |
7e53f3a4 DV |
1714 | if (modeset->mode) |
1715 | drm_mode_destroy(dev, modeset->mode); | |
1716 | modeset->mode = NULL; | |
1717 | } | |
1718 | } | |
8c5eaca0 | 1719 | out: |
38651674 DA |
1720 | kfree(crtcs); |
1721 | kfree(modes); | |
b0ee9e7f | 1722 | kfree(offsets); |
38651674 DA |
1723 | kfree(enabled); |
1724 | } | |
1725 | ||
1726 | /** | |
207fd329 | 1727 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
1728 | * @fb_helper: fb_helper device struct |
1729 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 1730 | * |
d0ddc033 | 1731 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
1732 | * At the moment, this is a cloned configuration across all heads with |
1733 | * a new framebuffer object as the backing store. | |
1734 | * | |
207fd329 DV |
1735 | * Note that this also registers the fbdev and so allows userspace to call into |
1736 | * the driver through the fbdev interfaces. | |
1737 | * | |
1738 | * This function will call down into the ->fb_probe callback to let | |
1739 | * the driver allocate and initialize the fbdev info structure and the drm | |
1740 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
1741 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
1742 | * values for the fbdev info structure. | |
1743 | * | |
38651674 DA |
1744 | * RETURNS: |
1745 | * Zero if everything went ok, nonzero otherwise. | |
1746 | */ | |
01934c2a | 1747 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 1748 | { |
8be48d92 | 1749 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
1750 | int count = 0; |
1751 | ||
53f1904b | 1752 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
1753 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
1754 | dev->mode_config.max_width, | |
1755 | dev->mode_config.max_height); | |
53f1904b | 1756 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
1757 | /* |
1758 | * we shouldn't end up with no modes here. | |
1759 | */ | |
96081cdf | 1760 | if (count == 0) |
d56b1b9d | 1761 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 1762 | |
8be48d92 | 1763 | drm_setup_crtcs(fb_helper); |
38651674 | 1764 | |
4abe3520 | 1765 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 1766 | } |
8be48d92 | 1767 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 1768 | |
7394371d CW |
1769 | /** |
1770 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 1771 | * probing all the outputs attached to the fb |
7394371d CW |
1772 | * @fb_helper: the drm_fb_helper |
1773 | * | |
7394371d CW |
1774 | * Scan the connectors attached to the fb_helper and try to put together a |
1775 | * setup after *notification of a change in output configuration. | |
1776 | * | |
207fd329 DV |
1777 | * Called at runtime, takes the mode config locks to be able to check/change the |
1778 | * modeset configuration. Must be run from process context (which usually means | |
1779 | * either the output polling work or a work item launched from the driver's | |
1780 | * hotplug interrupt). | |
1781 | * | |
50c3dc97 DV |
1782 | * Note that drivers may call this even before calling |
1783 | * drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows | |
1784 | * for a race-free fbcon setup and will make sure that the fbdev emulation will | |
1785 | * not miss any hotplug events. | |
207fd329 | 1786 | * |
7394371d CW |
1787 | * RETURNS: |
1788 | * 0 on success and a non-zero error code otherwise. | |
1789 | */ | |
1790 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 1791 | { |
7394371d | 1792 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 1793 | u32 max_width, max_height; |
5c4426a7 | 1794 | |
89ced125 | 1795 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
50c3dc97 | 1796 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 1797 | fb_helper->delayed_hotplug = true; |
89ced125 | 1798 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 1799 | return 0; |
4abe3520 | 1800 | } |
eb1f8e4f | 1801 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 1802 | |
eb1f8e4f DA |
1803 | max_width = fb_helper->fb->width; |
1804 | max_height = fb_helper->fb->height; | |
5c4426a7 | 1805 | |
51bbd276 | 1806 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
1807 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
1808 | ||
1809 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 1810 | drm_setup_crtcs(fb_helper); |
84849903 | 1811 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
1812 | drm_fb_helper_set_par(fb_helper->fbdev); |
1813 | ||
1814 | return 0; | |
5c4426a7 | 1815 | } |
eb1f8e4f | 1816 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 1817 | |
6a108a14 | 1818 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
1819 | * but the module doesn't depend on any fb console symbols. At least |
1820 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
1821 | */ | |
6a108a14 | 1822 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
1823 | static int __init drm_fb_helper_modinit(void) |
1824 | { | |
1825 | const char *name = "fbcon"; | |
1826 | struct module *fbcon; | |
1827 | ||
1828 | mutex_lock(&module_mutex); | |
1829 | fbcon = find_module(name); | |
1830 | mutex_unlock(&module_mutex); | |
1831 | ||
1832 | if (!fbcon) | |
1833 | request_module_nowait(name); | |
1834 | return 0; | |
1835 | } | |
1836 | ||
1837 | module_init(drm_fb_helper_modinit); | |
1838 | #endif |