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