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> | |
bbb1e524 RC |
41 | #include <drm/drm_atomic.h> |
42 | #include <drm/drm_atomic_helper.h> | |
785b93ef | 43 | |
f64c5573 DV |
44 | static bool drm_fbdev_emulation = true; |
45 | module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); | |
46 | MODULE_PARM_DESC(fbdev_emulation, | |
47 | "Enable legacy fbdev emulation [default=true]"); | |
48 | ||
785b93ef DA |
49 | static LIST_HEAD(kernel_fb_helper_list); |
50 | ||
d0ddc033 DV |
51 | /** |
52 | * DOC: fbdev helpers | |
53 | * | |
54 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
83c617c5 | 55 | * mode setting driver. They can be used mostly independently from the crtc |
d0ddc033 DV |
56 | * helper functions used by many drivers to implement the kernel mode setting |
57 | * interfaces. | |
207fd329 | 58 | * |
10a23102 TR |
59 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
60 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and | |
61 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the | |
62 | * default behaviour can override the third step with their own code. | |
63 | * Teardown is done with drm_fb_helper_fini(). | |
207fd329 DV |
64 | * |
65 | * At runtime drivers should restore the fbdev console by calling | |
3d9e35a9 GU |
66 | * drm_fb_helper_restore_fbdev_mode_unlocked() from their ->lastclose callback. |
67 | * They should also notify the fb helper code from updates to the output | |
207fd329 DV |
68 | * configuration by calling drm_fb_helper_hotplug_event(). For easier |
69 | * integration with the output polling code in drm_crtc_helper.c the modeset | |
83c617c5 | 70 | * code provides a ->output_poll_changed callback. |
207fd329 DV |
71 | * |
72 | * All other functions exported by the fb helper library can be used to | |
73 | * implement the fbdev driver interface by the driver. | |
10a23102 TR |
74 | * |
75 | * It is possible, though perhaps somewhat tricky, to implement race-free | |
76 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() | |
77 | * helper must be called first to initialize the minimum required to make | |
78 | * hotplug detection work. Drivers also need to make sure to properly set up | |
79 | * the dev->mode_config.funcs member. After calling drm_kms_helper_poll_init() | |
80 | * it is safe to enable interrupts and start processing hotplug events. At the | |
81 | * same time, drivers should initialize all modeset objects such as CRTCs, | |
82 | * encoders and connectors. To finish up the fbdev helper initialization, the | |
83 | * drm_fb_helper_init() function is called. To probe for all attached displays | |
84 | * and set up an initial configuration using the detected hardware, drivers | |
85 | * should call drm_fb_helper_single_add_all_connectors() followed by | |
86 | * drm_fb_helper_initial_config(). | |
d0ddc033 DV |
87 | */ |
88 | ||
207fd329 DV |
89 | /** |
90 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
91 | * emulation helper | |
92 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
93 | * | |
94 | * This functions adds all the available connectors for use with the given | |
95 | * fb_helper. This is a separate step to allow drivers to freely assign | |
96 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
97 | * not adequate to be used for the fbcon. | |
98 | * | |
169faeca DV |
99 | * This function is protected against concurrent connector hotadds/removals |
100 | * using drm_fb_helper_add_one_connector() and | |
101 | * drm_fb_helper_remove_one_connector(). | |
207fd329 | 102 | */ |
0b4c0f3f | 103 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 104 | { |
0b4c0f3f DA |
105 | struct drm_device *dev = fb_helper->dev; |
106 | struct drm_connector *connector; | |
107 | int i; | |
d50ba256 | 108 | |
f64c5573 DV |
109 | if (!drm_fbdev_emulation) |
110 | return 0; | |
111 | ||
169faeca | 112 | mutex_lock(&dev->mode_config.mutex); |
6295d607 | 113 | drm_for_each_connector(connector, dev) { |
0b4c0f3f DA |
114 | struct drm_fb_helper_connector *fb_helper_connector; |
115 | ||
116 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
117 | if (!fb_helper_connector) | |
118 | goto fail; | |
d50ba256 | 119 | |
0b4c0f3f DA |
120 | fb_helper_connector->connector = connector; |
121 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
122 | } | |
169faeca | 123 | mutex_unlock(&dev->mode_config.mutex); |
d50ba256 | 124 | return 0; |
0b4c0f3f DA |
125 | fail: |
126 | for (i = 0; i < fb_helper->connector_count; i++) { | |
127 | kfree(fb_helper->connector_info[i]); | |
128 | fb_helper->connector_info[i] = NULL; | |
129 | } | |
130 | fb_helper->connector_count = 0; | |
169faeca DV |
131 | mutex_unlock(&dev->mode_config.mutex); |
132 | ||
0b4c0f3f | 133 | return -ENOMEM; |
d50ba256 | 134 | } |
0b4c0f3f | 135 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 136 | |
65c2a89c DA |
137 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) |
138 | { | |
139 | struct drm_fb_helper_connector **temp; | |
140 | struct drm_fb_helper_connector *fb_helper_connector; | |
141 | ||
f64c5573 DV |
142 | if (!drm_fbdev_emulation) |
143 | return 0; | |
144 | ||
65c2a89c DA |
145 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
146 | if (fb_helper->connector_count + 1 > fb_helper->connector_info_alloc_count) { | |
14f476fa | 147 | temp = krealloc(fb_helper->connector_info, sizeof(struct drm_fb_helper_connector *) * (fb_helper->connector_count + 1), GFP_KERNEL); |
65c2a89c DA |
148 | if (!temp) |
149 | return -ENOMEM; | |
150 | ||
151 | fb_helper->connector_info_alloc_count = fb_helper->connector_count + 1; | |
152 | fb_helper->connector_info = temp; | |
153 | } | |
154 | ||
155 | ||
156 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
157 | if (!fb_helper_connector) | |
158 | return -ENOMEM; | |
159 | ||
160 | fb_helper_connector->connector = connector; | |
161 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
162 | return 0; | |
163 | } | |
164 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); | |
165 | ||
2148f18f RC |
166 | static void remove_from_modeset(struct drm_mode_set *set, |
167 | struct drm_connector *connector) | |
168 | { | |
169 | int i, j; | |
170 | ||
171 | for (i = 0; i < set->num_connectors; i++) { | |
172 | if (set->connectors[i] == connector) | |
173 | break; | |
174 | } | |
175 | ||
176 | if (i == set->num_connectors) | |
177 | return; | |
178 | ||
179 | for (j = i + 1; j < set->num_connectors; j++) { | |
180 | set->connectors[j - 1] = set->connectors[j]; | |
181 | } | |
182 | set->num_connectors--; | |
183 | ||
cebbb739 | 184 | /* |
2148f18f RC |
185 | * TODO maybe need to makes sure we set it back to !=NULL somewhere? |
186 | */ | |
cebbb739 | 187 | if (set->num_connectors == 0) { |
2148f18f | 188 | set->fb = NULL; |
cebbb739 ML |
189 | drm_mode_destroy(connector->dev, set->mode); |
190 | set->mode = NULL; | |
191 | } | |
2148f18f RC |
192 | } |
193 | ||
65c2a89c DA |
194 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, |
195 | struct drm_connector *connector) | |
196 | { | |
197 | struct drm_fb_helper_connector *fb_helper_connector; | |
198 | int i, j; | |
199 | ||
f64c5573 DV |
200 | if (!drm_fbdev_emulation) |
201 | return 0; | |
202 | ||
65c2a89c DA |
203 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
204 | ||
205 | for (i = 0; i < fb_helper->connector_count; i++) { | |
206 | if (fb_helper->connector_info[i]->connector == connector) | |
207 | break; | |
208 | } | |
209 | ||
210 | if (i == fb_helper->connector_count) | |
211 | return -EINVAL; | |
212 | fb_helper_connector = fb_helper->connector_info[i]; | |
213 | ||
214 | for (j = i + 1; j < fb_helper->connector_count; j++) { | |
215 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; | |
216 | } | |
217 | fb_helper->connector_count--; | |
218 | kfree(fb_helper_connector); | |
2148f18f RC |
219 | |
220 | /* also cleanup dangling references to the connector: */ | |
221 | for (i = 0; i < fb_helper->crtc_count; i++) | |
222 | remove_from_modeset(&fb_helper->crtc_info[i].mode_set, connector); | |
223 | ||
65c2a89c DA |
224 | return 0; |
225 | } | |
226 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); | |
227 | ||
99231028 JW |
228 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
229 | { | |
230 | uint16_t *r_base, *g_base, *b_base; | |
231 | int i; | |
232 | ||
04c0c569 VS |
233 | if (helper->funcs->gamma_get == NULL) |
234 | return; | |
235 | ||
99231028 JW |
236 | r_base = crtc->gamma_store; |
237 | g_base = r_base + crtc->gamma_size; | |
238 | b_base = g_base + crtc->gamma_size; | |
239 | ||
240 | for (i = 0; i < crtc->gamma_size; i++) | |
241 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
242 | } | |
243 | ||
244 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
245 | { | |
246 | uint16_t *r_base, *g_base, *b_base; | |
247 | ||
ebe0f244 LP |
248 | if (crtc->funcs->gamma_set == NULL) |
249 | return; | |
250 | ||
99231028 JW |
251 | r_base = crtc->gamma_store; |
252 | g_base = r_base + crtc->gamma_size; | |
253 | b_base = g_base + crtc->gamma_size; | |
254 | ||
255 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); | |
256 | } | |
257 | ||
207fd329 DV |
258 | /** |
259 | * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter | |
260 | * @info: fbdev registered by the helper | |
261 | */ | |
1a7aba7f JB |
262 | int drm_fb_helper_debug_enter(struct fb_info *info) |
263 | { | |
264 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 265 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
266 | int i; |
267 | ||
1a7aba7f JB |
268 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
269 | for (i = 0; i < helper->crtc_count; i++) { | |
270 | struct drm_mode_set *mode_set = | |
271 | &helper->crtc_info[i].mode_set; | |
272 | ||
273 | if (!mode_set->crtc->enabled) | |
274 | continue; | |
275 | ||
276 | funcs = mode_set->crtc->helper_private; | |
99231028 | 277 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
278 | funcs->mode_set_base_atomic(mode_set->crtc, |
279 | mode_set->fb, | |
280 | mode_set->x, | |
413d45d3 | 281 | mode_set->y, |
21c74a8e | 282 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
283 | } |
284 | } | |
285 | ||
286 | return 0; | |
287 | } | |
288 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
289 | ||
290 | /* Find the real fb for a given fb helper CRTC */ | |
291 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
292 | { | |
293 | struct drm_device *dev = crtc->dev; | |
294 | struct drm_crtc *c; | |
295 | ||
6295d607 | 296 | drm_for_each_crtc(c, dev) { |
1a7aba7f | 297 | if (crtc->base.id == c->base.id) |
f4510a27 | 298 | return c->primary->fb; |
1a7aba7f JB |
299 | } |
300 | ||
301 | return NULL; | |
302 | } | |
303 | ||
207fd329 DV |
304 | /** |
305 | * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave | |
306 | * @info: fbdev registered by the helper | |
307 | */ | |
1a7aba7f JB |
308 | int drm_fb_helper_debug_leave(struct fb_info *info) |
309 | { | |
310 | struct drm_fb_helper *helper = info->par; | |
311 | struct drm_crtc *crtc; | |
be26a66d | 312 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
313 | struct drm_framebuffer *fb; |
314 | int i; | |
315 | ||
316 | for (i = 0; i < helper->crtc_count; i++) { | |
317 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
318 | crtc = mode_set->crtc; | |
319 | funcs = crtc->helper_private; | |
320 | fb = drm_mode_config_fb(crtc); | |
321 | ||
322 | if (!crtc->enabled) | |
323 | continue; | |
324 | ||
325 | if (!fb) { | |
326 | DRM_ERROR("no fb to restore??\n"); | |
327 | continue; | |
328 | } | |
329 | ||
99231028 | 330 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 331 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 332 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
333 | } |
334 | ||
335 | return 0; | |
336 | } | |
337 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
338 | ||
bbb1e524 RC |
339 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
340 | { | |
341 | struct drm_device *dev = fb_helper->dev; | |
342 | struct drm_plane *plane; | |
343 | struct drm_atomic_state *state; | |
344 | int i, ret; | |
345 | ||
346 | state = drm_atomic_state_alloc(dev); | |
347 | if (!state) | |
348 | return -ENOMEM; | |
349 | ||
350 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
351 | retry: | |
352 | drm_for_each_plane(plane, dev) { | |
353 | struct drm_plane_state *plane_state; | |
354 | ||
94284037 MR |
355 | plane->old_fb = plane->fb; |
356 | ||
bbb1e524 RC |
357 | plane_state = drm_atomic_get_plane_state(state, plane); |
358 | if (IS_ERR(plane_state)) { | |
359 | ret = PTR_ERR(plane_state); | |
360 | goto fail; | |
361 | } | |
362 | ||
16e910df | 363 | plane_state->rotation = BIT(DRM_ROTATE_0); |
bbb1e524 RC |
364 | |
365 | /* disable non-primary: */ | |
366 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
367 | continue; | |
368 | ||
369 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
370 | if (ret != 0) | |
371 | goto fail; | |
372 | } | |
373 | ||
374 | for(i = 0; i < fb_helper->crtc_count; i++) { | |
375 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
376 | ||
377 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
378 | if (ret != 0) | |
379 | goto fail; | |
380 | } | |
381 | ||
382 | ret = drm_atomic_commit(state); | |
bbb1e524 RC |
383 | |
384 | fail: | |
94284037 MR |
385 | drm_for_each_plane(plane, dev) { |
386 | if (ret == 0) { | |
387 | struct drm_framebuffer *new_fb = plane->state->fb; | |
388 | if (new_fb) | |
389 | drm_framebuffer_reference(new_fb); | |
390 | plane->fb = new_fb; | |
391 | plane->crtc = plane->state->crtc; | |
392 | ||
393 | if (plane->old_fb) | |
394 | drm_framebuffer_unreference(plane->old_fb); | |
395 | } | |
396 | plane->old_fb = NULL; | |
397 | } | |
398 | ||
bbb1e524 RC |
399 | if (ret == -EDEADLK) |
400 | goto backoff; | |
401 | ||
94284037 MR |
402 | if (ret != 0) |
403 | drm_atomic_state_free(state); | |
bbb1e524 RC |
404 | |
405 | return ret; | |
406 | ||
407 | backoff: | |
408 | drm_atomic_state_clear(state); | |
409 | drm_atomic_legacy_backoff(state); | |
410 | ||
411 | goto retry; | |
412 | } | |
413 | ||
b7bdf0a8 | 414 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 415 | { |
3858bc5d VS |
416 | struct drm_device *dev = fb_helper->dev; |
417 | struct drm_plane *plane; | |
3858bc5d VS |
418 | int i; |
419 | ||
420 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 421 | |
bbb1e524 RC |
422 | if (fb_helper->atomic) |
423 | return restore_fbdev_mode_atomic(fb_helper); | |
424 | ||
6295d607 | 425 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
426 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
427 | drm_plane_force_disable(plane); | |
6aed8ec3 | 428 | |
9783de20 | 429 | if (dev->mode_config.rotation_property) { |
3a5f87c2 TW |
430 | drm_mode_plane_set_obj_prop(plane, |
431 | dev->mode_config.rotation_property, | |
432 | BIT(DRM_ROTATE_0)); | |
9783de20 SJ |
433 | } |
434 | } | |
435 | ||
e8e7a2b8 DA |
436 | for (i = 0; i < fb_helper->crtc_count; i++) { |
437 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
438 | struct drm_crtc *crtc = mode_set->crtc; |
439 | int ret; | |
440 | ||
441 | if (crtc->funcs->cursor_set) { | |
442 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); | |
443 | if (ret) | |
b7bdf0a8 | 444 | return ret; |
3858bc5d VS |
445 | } |
446 | ||
2d13b679 | 447 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 448 | if (ret) |
b7bdf0a8 | 449 | return ret; |
e8e7a2b8 | 450 | } |
b7bdf0a8 DV |
451 | |
452 | return 0; | |
e8e7a2b8 | 453 | } |
5ea1f752 RC |
454 | |
455 | /** | |
456 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
457 | * @fb_helper: fbcon to restore | |
458 | * | |
459 | * This should be called from driver's drm ->lastclose callback | |
460 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
461 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
462 | * |
463 | * RETURNS: | |
464 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 465 | */ |
b7bdf0a8 | 466 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
467 | { |
468 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
469 | bool do_delayed; |
470 | int ret; | |
e2809c7d | 471 | |
f64c5573 DV |
472 | if (!drm_fbdev_emulation) |
473 | return -ENODEV; | |
474 | ||
5ea1f752 RC |
475 | drm_modeset_lock_all(dev); |
476 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
477 | |
478 | do_delayed = fb_helper->delayed_hotplug; | |
479 | if (do_delayed) | |
480 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 481 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
482 | |
483 | if (do_delayed) | |
484 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
485 | return ret; |
486 | } | |
487 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 488 | |
2c4124fd GU |
489 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
490 | { | |
491 | struct drm_device *dev = fb_helper->dev; | |
492 | struct drm_crtc *crtc; | |
493 | int bound = 0, crtcs_bound = 0; | |
494 | ||
495 | /* Sometimes user space wants everything disabled, so don't steal the | |
496 | * display if there's a master. */ | |
497 | if (dev->primary->master) | |
498 | return false; | |
499 | ||
500 | drm_for_each_crtc(crtc, dev) { | |
501 | if (crtc->primary->fb) | |
502 | crtcs_bound++; | |
503 | if (crtc->primary->fb == fb_helper->fb) | |
504 | bound++; | |
505 | } | |
506 | ||
507 | if (bound < crtcs_bound) | |
508 | return false; | |
509 | ||
510 | return true; | |
511 | } | |
512 | ||
513 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
514 | /* |
515 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
516 | * and panic handling. | |
517 | */ | |
78b9c353 | 518 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 519 | { |
785b93ef DA |
520 | bool ret, error = false; |
521 | struct drm_fb_helper *helper; | |
522 | ||
523 | if (list_empty(&kernel_fb_helper_list)) | |
524 | return false; | |
525 | ||
526 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
527 | struct drm_device *dev = helper->dev; |
528 | ||
529 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
530 | continue; | |
531 | ||
dd908c86 | 532 | drm_modeset_lock_all(dev); |
3d9e35a9 | 533 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
534 | if (ret) |
535 | error = true; | |
cb597bb3 | 536 | drm_modeset_unlock_all(dev); |
785b93ef DA |
537 | } |
538 | return error; | |
539 | } | |
540 | ||
785b93ef DA |
541 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
542 | { | |
d21bf469 DV |
543 | bool ret; |
544 | ret = drm_fb_helper_force_kernel_mode(); | |
545 | if (ret == true) | |
546 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
547 | } |
548 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
549 | ||
1495cc9d | 550 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
551 | { |
552 | schedule_work(&drm_fb_helper_restore_work); | |
553 | } | |
554 | ||
555 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
556 | .handler = drm_fb_helper_sysrq, | |
557 | .help_msg = "force-fb(V)", | |
558 | .action_msg = "Restore framebuffer console", | |
559 | }; | |
b8c40d62 RD |
560 | #else |
561 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 562 | #endif |
785b93ef | 563 | |
3a8148c5 | 564 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
565 | { |
566 | struct drm_fb_helper *fb_helper = info->par; | |
567 | struct drm_device *dev = fb_helper->dev; | |
568 | struct drm_crtc *crtc; | |
023eb571 | 569 | struct drm_connector *connector; |
023eb571 | 570 | int i, j; |
785b93ef DA |
571 | |
572 | /* | |
3a8148c5 | 573 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 574 | */ |
84849903 | 575 | drm_modeset_lock_all(dev); |
20c60c35 DV |
576 | if (!drm_fb_helper_is_bound(fb_helper)) { |
577 | drm_modeset_unlock_all(dev); | |
578 | return; | |
579 | } | |
580 | ||
e87b2c42 | 581 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 582 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 583 | |
8be48d92 DA |
584 | if (!crtc->enabled) |
585 | continue; | |
586 | ||
3a8148c5 | 587 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
588 | for (j = 0; j < fb_helper->connector_count; j++) { |
589 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 590 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 591 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 592 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 593 | } |
785b93ef | 594 | } |
84849903 | 595 | drm_modeset_unlock_all(dev); |
785b93ef DA |
596 | } |
597 | ||
207fd329 DV |
598 | /** |
599 | * drm_fb_helper_blank - implementation for ->fb_blank | |
600 | * @blank: desired blanking state | |
601 | * @info: fbdev registered by the helper | |
602 | */ | |
785b93ef DA |
603 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
604 | { | |
c50bfd08 DV |
605 | if (oops_in_progress) |
606 | return -EBUSY; | |
607 | ||
785b93ef | 608 | switch (blank) { |
731b5a15 | 609 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 610 | case FB_BLANK_UNBLANK: |
3a8148c5 | 611 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 612 | break; |
731b5a15 | 613 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 614 | case FB_BLANK_NORMAL: |
3a8148c5 | 615 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 616 | break; |
731b5a15 | 617 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 618 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 619 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 620 | break; |
731b5a15 | 621 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 622 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 623 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 624 | break; |
731b5a15 | 625 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 626 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 627 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
628 | break; |
629 | } | |
630 | return 0; | |
631 | } | |
632 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
633 | ||
634 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
635 | { | |
636 | int i; | |
637 | ||
0b4c0f3f DA |
638 | for (i = 0; i < helper->connector_count; i++) |
639 | kfree(helper->connector_info[i]); | |
640 | kfree(helper->connector_info); | |
a1b7736d | 641 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 642 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
643 | if (helper->crtc_info[i].mode_set.mode) |
644 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
645 | } | |
785b93ef DA |
646 | kfree(helper->crtc_info); |
647 | } | |
648 | ||
10a23102 TR |
649 | /** |
650 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
651 | * @dev: DRM device | |
652 | * @helper: driver-allocated fbdev helper structure to set up | |
653 | * @funcs: pointer to structure of functions associate with this helper | |
654 | * | |
655 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
656 | * useful to implement race-free initialization of the polling helpers. | |
657 | */ | |
658 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
659 | const struct drm_fb_helper_funcs *funcs) | |
660 | { | |
661 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
662 | helper->funcs = funcs; | |
663 | helper->dev = dev; | |
664 | } | |
665 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
666 | ||
207fd329 DV |
667 | /** |
668 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
669 | * @dev: drm device | |
670 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
671 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
672 | * @max_conn_count: max connector count | |
673 | * | |
674 | * This allocates the structures for the fbdev helper with the given limits. | |
675 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
676 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
677 | * to allow driver writes more control over the exact init sequence. | |
678 | * | |
10a23102 | 679 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
680 | * |
681 | * RETURNS: | |
682 | * Zero if everything went ok, nonzero otherwise. | |
683 | */ | |
4abe3520 DA |
684 | int drm_fb_helper_init(struct drm_device *dev, |
685 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 686 | int crtc_count, int max_conn_count) |
785b93ef | 687 | { |
785b93ef | 688 | struct drm_crtc *crtc; |
785b93ef DA |
689 | int i; |
690 | ||
f64c5573 DV |
691 | if (!drm_fbdev_emulation) |
692 | return 0; | |
693 | ||
04cfe97e XL |
694 | if (!max_conn_count) |
695 | return -EINVAL; | |
696 | ||
4abe3520 DA |
697 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
698 | if (!fb_helper->crtc_info) | |
785b93ef DA |
699 | return -ENOMEM; |
700 | ||
4abe3520 DA |
701 | fb_helper->crtc_count = crtc_count; |
702 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
703 | if (!fb_helper->connector_info) { | |
704 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
705 | return -ENOMEM; |
706 | } | |
65c2a89c | 707 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 708 | fb_helper->connector_count = 0; |
785b93ef DA |
709 | |
710 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 711 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
712 | kcalloc(max_conn_count, |
713 | sizeof(struct drm_connector *), | |
714 | GFP_KERNEL); | |
715 | ||
4a1b0714 | 716 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 717 | goto out_free; |
4abe3520 | 718 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
719 | } |
720 | ||
721 | i = 0; | |
6295d607 | 722 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 723 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
724 | i++; |
725 | } | |
e9ad3181 | 726 | |
bbb1e524 RC |
727 | fb_helper->atomic = !!drm_core_check_feature(dev, DRIVER_ATOMIC); |
728 | ||
785b93ef DA |
729 | return 0; |
730 | out_free: | |
4abe3520 | 731 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
732 | return -ENOMEM; |
733 | } | |
4abe3520 DA |
734 | EXPORT_SYMBOL(drm_fb_helper_init); |
735 | ||
b8017d6c AT |
736 | /** |
737 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
738 | * @fb_helper: driver-allocated fbdev helper | |
739 | * | |
740 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
741 | * by the driver within the fb_probe fb_helper callback function. | |
742 | * | |
743 | * RETURNS: | |
744 | * fb_info pointer if things went okay, pointer containing error code | |
745 | * otherwise | |
746 | */ | |
747 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
748 | { | |
749 | struct device *dev = fb_helper->dev->dev; | |
750 | struct fb_info *info; | |
751 | int ret; | |
752 | ||
753 | info = framebuffer_alloc(0, dev); | |
754 | if (!info) | |
755 | return ERR_PTR(-ENOMEM); | |
756 | ||
757 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
758 | if (ret) | |
759 | goto err_release; | |
760 | ||
761 | info->apertures = alloc_apertures(1); | |
762 | if (!info->apertures) { | |
763 | ret = -ENOMEM; | |
764 | goto err_free_cmap; | |
765 | } | |
766 | ||
767 | fb_helper->fbdev = info; | |
768 | ||
769 | return info; | |
770 | ||
771 | err_free_cmap: | |
772 | fb_dealloc_cmap(&info->cmap); | |
773 | err_release: | |
774 | framebuffer_release(info); | |
775 | return ERR_PTR(ret); | |
776 | } | |
777 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
778 | ||
779 | /** | |
780 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
781 | * @fb_helper: driver-allocated fbdev helper | |
782 | * | |
783 | * A wrapper around unregister_framebuffer, to release the fb_info | |
784 | * framebuffer device | |
785 | */ | |
786 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
787 | { | |
788 | if (fb_helper && fb_helper->fbdev) | |
789 | unregister_framebuffer(fb_helper->fbdev); | |
790 | } | |
791 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
792 | ||
793 | /** | |
794 | * drm_fb_helper_release_fbi - dealloc fb_info and its members | |
795 | * @fb_helper: driver-allocated fbdev helper | |
796 | * | |
797 | * A helper to free memory taken by fb_info and the members cmap and | |
798 | * apertures | |
799 | */ | |
800 | void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) | |
801 | { | |
802 | if (fb_helper) { | |
803 | struct fb_info *info = fb_helper->fbdev; | |
804 | ||
805 | if (info) { | |
806 | if (info->cmap.len) | |
807 | fb_dealloc_cmap(&info->cmap); | |
808 | framebuffer_release(info); | |
809 | } | |
810 | ||
811 | fb_helper->fbdev = NULL; | |
812 | } | |
813 | } | |
814 | EXPORT_SYMBOL(drm_fb_helper_release_fbi); | |
815 | ||
4abe3520 DA |
816 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
817 | { | |
f64c5573 DV |
818 | if (!drm_fbdev_emulation) |
819 | return; | |
820 | ||
4abe3520 DA |
821 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
822 | list_del(&fb_helper->kernel_fb_list); | |
823 | if (list_empty(&kernel_fb_helper_list)) { | |
4abe3520 DA |
824 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
825 | } | |
826 | } | |
827 | ||
828 | drm_fb_helper_crtc_free(fb_helper); | |
829 | ||
4abe3520 DA |
830 | } |
831 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 832 | |
47074ab7 AT |
833 | /** |
834 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
835 | * @fb_helper: driver-allocated fbdev helper | |
836 | * | |
837 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
838 | */ | |
839 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
840 | { | |
841 | if (fb_helper && fb_helper->fbdev) | |
842 | unlink_framebuffer(fb_helper->fbdev); | |
843 | } | |
844 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
845 | ||
cbb1a82e AT |
846 | /** |
847 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
848 | * @info: fb_info struct pointer | |
849 | * @buf: userspace buffer to read from framebuffer memory | |
850 | * @count: number of bytes to read from framebuffer memory | |
851 | * @ppos: read offset within framebuffer memory | |
852 | * | |
853 | * A wrapper around fb_sys_read implemented by fbdev core | |
854 | */ | |
855 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
856 | size_t count, loff_t *ppos) | |
857 | { | |
858 | return fb_sys_read(info, buf, count, ppos); | |
859 | } | |
860 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
861 | ||
862 | /** | |
863 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
864 | * @info: fb_info struct pointer | |
865 | * @buf: userspace buffer to write to framebuffer memory | |
866 | * @count: number of bytes to write to framebuffer memory | |
867 | * @ppos: write offset within framebuffer memory | |
868 | * | |
869 | * A wrapper around fb_sys_write implemented by fbdev core | |
870 | */ | |
871 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
872 | size_t count, loff_t *ppos) | |
873 | { | |
874 | return fb_sys_write(info, buf, count, ppos); | |
875 | } | |
876 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
877 | ||
742547b7 AT |
878 | /** |
879 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
880 | * @info: fbdev registered by the helper | |
881 | * @rect: info about rectangle to fill | |
882 | * | |
883 | * A wrapper around sys_fillrect implemented by fbdev core | |
884 | */ | |
885 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
886 | const struct fb_fillrect *rect) | |
887 | { | |
888 | sys_fillrect(info, rect); | |
889 | } | |
890 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
891 | ||
892 | /** | |
893 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
894 | * @info: fbdev registered by the helper | |
895 | * @area: info about area to copy | |
896 | * | |
897 | * A wrapper around sys_copyarea implemented by fbdev core | |
898 | */ | |
899 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
900 | const struct fb_copyarea *area) | |
901 | { | |
902 | sys_copyarea(info, area); | |
903 | } | |
904 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
905 | ||
906 | /** | |
907 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
908 | * @info: fbdev registered by the helper | |
909 | * @image: info about image to blit | |
910 | * | |
911 | * A wrapper around sys_imageblit implemented by fbdev core | |
912 | */ | |
913 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
914 | const struct fb_image *image) | |
915 | { | |
916 | sys_imageblit(info, image); | |
917 | } | |
918 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
919 | ||
920 | /** | |
921 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
922 | * @info: fbdev registered by the helper | |
923 | * @rect: info about rectangle to fill | |
924 | * | |
925 | * A wrapper around cfb_imageblit implemented by fbdev core | |
926 | */ | |
927 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
928 | const struct fb_fillrect *rect) | |
929 | { | |
930 | cfb_fillrect(info, rect); | |
931 | } | |
932 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
933 | ||
934 | /** | |
935 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
936 | * @info: fbdev registered by the helper | |
937 | * @area: info about area to copy | |
938 | * | |
939 | * A wrapper around cfb_copyarea implemented by fbdev core | |
940 | */ | |
941 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
942 | const struct fb_copyarea *area) | |
943 | { | |
944 | cfb_copyarea(info, area); | |
945 | } | |
946 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
947 | ||
948 | /** | |
949 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
950 | * @info: fbdev registered by the helper | |
951 | * @image: info about image to blit | |
952 | * | |
953 | * A wrapper around cfb_imageblit implemented by fbdev core | |
954 | */ | |
955 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
956 | const struct fb_image *image) | |
957 | { | |
958 | cfb_imageblit(info, image); | |
959 | } | |
960 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
961 | ||
fdefa58a AT |
962 | /** |
963 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
964 | * @fb_helper: driver-allocated fbdev helper | |
965 | * @state: desired state, zero to resume, non-zero to suspend | |
966 | * | |
967 | * A wrapper around fb_set_suspend implemented by fbdev core | |
968 | */ | |
969 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, int state) | |
970 | { | |
971 | if (fb_helper && fb_helper->fbdev) | |
972 | fb_set_suspend(fb_helper->fbdev, state); | |
973 | } | |
974 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
975 | ||
c850cb78 | 976 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
977 | u16 blue, u16 regno, struct fb_info *info) |
978 | { | |
979 | struct drm_fb_helper *fb_helper = info->par; | |
980 | struct drm_framebuffer *fb = fb_helper->fb; | |
981 | int pindex; | |
982 | ||
c850cb78 DA |
983 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
984 | u32 *palette; | |
985 | u32 value; | |
986 | /* place color in psuedopalette */ | |
987 | if (regno > 16) | |
988 | return -EINVAL; | |
989 | palette = (u32 *)info->pseudo_palette; | |
990 | red >>= (16 - info->var.red.length); | |
991 | green >>= (16 - info->var.green.length); | |
992 | blue >>= (16 - info->var.blue.length); | |
993 | value = (red << info->var.red.offset) | | |
994 | (green << info->var.green.offset) | | |
995 | (blue << info->var.blue.offset); | |
9da12b6a RC |
996 | if (info->var.transp.length > 0) { |
997 | u32 mask = (1 << info->var.transp.length) - 1; | |
998 | mask <<= info->var.transp.offset; | |
999 | value |= mask; | |
1000 | } | |
c850cb78 DA |
1001 | palette[regno] = value; |
1002 | return 0; | |
1003 | } | |
1004 | ||
04c0c569 VS |
1005 | /* |
1006 | * The driver really shouldn't advertise pseudo/directcolor | |
1007 | * visuals if it can't deal with the palette. | |
1008 | */ | |
1009 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1010 | !fb_helper->funcs->gamma_get)) | |
1011 | return -EINVAL; | |
1012 | ||
b8c00ac5 DA |
1013 | pindex = regno; |
1014 | ||
1015 | if (fb->bits_per_pixel == 16) { | |
1016 | pindex = regno << 3; | |
1017 | ||
1018 | if (fb->depth == 16 && regno > 63) | |
c850cb78 | 1019 | return -EINVAL; |
b8c00ac5 | 1020 | if (fb->depth == 15 && regno > 31) |
c850cb78 | 1021 | return -EINVAL; |
b8c00ac5 DA |
1022 | |
1023 | if (fb->depth == 16) { | |
1024 | u16 r, g, b; | |
1025 | int i; | |
1026 | if (regno < 32) { | |
1027 | for (i = 0; i < 8; i++) | |
1028 | fb_helper->funcs->gamma_set(crtc, red, | |
1029 | green, blue, pindex + i); | |
1030 | } | |
1031 | ||
1032 | fb_helper->funcs->gamma_get(crtc, &r, | |
1033 | &g, &b, | |
1034 | pindex >> 1); | |
1035 | ||
1036 | for (i = 0; i < 4; i++) | |
1037 | fb_helper->funcs->gamma_set(crtc, r, | |
1038 | green, b, | |
1039 | (pindex >> 1) + i); | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | if (fb->depth != 16) | |
1044 | fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); | |
c850cb78 | 1045 | return 0; |
b8c00ac5 DA |
1046 | } |
1047 | ||
207fd329 DV |
1048 | /** |
1049 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
1050 | * @cmap: cmap to set | |
1051 | * @info: fbdev registered by the helper | |
1052 | */ | |
068143d3 DA |
1053 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1054 | { | |
1055 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1056 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1057 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1058 | u16 *red, *green, *blue, *transp; |
1059 | struct drm_crtc *crtc; | |
062ac622 | 1060 | int i, j, rc = 0; |
068143d3 DA |
1061 | int start; |
1062 | ||
c50bfd08 | 1063 | if (oops_in_progress) |
9aa609e1 | 1064 | return -EBUSY; |
c50bfd08 DV |
1065 | |
1066 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1067 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1068 | drm_modeset_unlock_all(dev); | |
1069 | return -EBUSY; | |
1070 | } | |
1071 | ||
8be48d92 DA |
1072 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1073 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1074 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1075 | |
1076 | red = cmap->red; | |
1077 | green = cmap->green; | |
1078 | blue = cmap->blue; | |
1079 | transp = cmap->transp; | |
1080 | start = cmap->start; | |
1081 | ||
062ac622 | 1082 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1083 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1084 | ||
1085 | hred = *red++; | |
1086 | hgreen = *green++; | |
1087 | hblue = *blue++; | |
1088 | ||
1089 | if (transp) | |
1090 | htransp = *transp++; | |
1091 | ||
c850cb78 DA |
1092 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1093 | if (rc) | |
8391a3d5 | 1094 | goto out; |
068143d3 | 1095 | } |
04c0c569 VS |
1096 | if (crtc_funcs->load_lut) |
1097 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1098 | } |
8391a3d5 VS |
1099 | out: |
1100 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1101 | return rc; |
1102 | } | |
1103 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1104 | ||
207fd329 DV |
1105 | /** |
1106 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
1107 | * @var: screeninfo to check | |
1108 | * @info: fbdev registered by the helper | |
1109 | */ | |
785b93ef DA |
1110 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1111 | struct fb_info *info) | |
1112 | { | |
1113 | struct drm_fb_helper *fb_helper = info->par; | |
1114 | struct drm_framebuffer *fb = fb_helper->fb; | |
1115 | int depth; | |
1116 | ||
f90ebd9e | 1117 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1118 | return -EINVAL; |
1119 | ||
1120 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
1121 | if (var->bits_per_pixel > fb->bits_per_pixel || |
1122 | var->xres > fb->width || var->yres > fb->height || | |
1123 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 1124 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
1125 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1126 | var->xres, var->yres, var->bits_per_pixel, | |
1127 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 1128 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
1129 | return -EINVAL; |
1130 | } | |
1131 | ||
1132 | switch (var->bits_per_pixel) { | |
1133 | case 16: | |
1134 | depth = (var->green.length == 6) ? 16 : 15; | |
1135 | break; | |
1136 | case 32: | |
1137 | depth = (var->transp.length > 0) ? 32 : 24; | |
1138 | break; | |
1139 | default: | |
1140 | depth = var->bits_per_pixel; | |
1141 | break; | |
1142 | } | |
1143 | ||
1144 | switch (depth) { | |
1145 | case 8: | |
1146 | var->red.offset = 0; | |
1147 | var->green.offset = 0; | |
1148 | var->blue.offset = 0; | |
1149 | var->red.length = 8; | |
1150 | var->green.length = 8; | |
1151 | var->blue.length = 8; | |
1152 | var->transp.length = 0; | |
1153 | var->transp.offset = 0; | |
1154 | break; | |
1155 | case 15: | |
1156 | var->red.offset = 10; | |
1157 | var->green.offset = 5; | |
1158 | var->blue.offset = 0; | |
1159 | var->red.length = 5; | |
1160 | var->green.length = 5; | |
1161 | var->blue.length = 5; | |
1162 | var->transp.length = 1; | |
1163 | var->transp.offset = 15; | |
1164 | break; | |
1165 | case 16: | |
1166 | var->red.offset = 11; | |
1167 | var->green.offset = 5; | |
1168 | var->blue.offset = 0; | |
1169 | var->red.length = 5; | |
1170 | var->green.length = 6; | |
1171 | var->blue.length = 5; | |
1172 | var->transp.length = 0; | |
1173 | var->transp.offset = 0; | |
1174 | break; | |
1175 | case 24: | |
1176 | var->red.offset = 16; | |
1177 | var->green.offset = 8; | |
1178 | var->blue.offset = 0; | |
1179 | var->red.length = 8; | |
1180 | var->green.length = 8; | |
1181 | var->blue.length = 8; | |
1182 | var->transp.length = 0; | |
1183 | var->transp.offset = 0; | |
1184 | break; | |
1185 | case 32: | |
1186 | var->red.offset = 16; | |
1187 | var->green.offset = 8; | |
1188 | var->blue.offset = 0; | |
1189 | var->red.length = 8; | |
1190 | var->green.length = 8; | |
1191 | var->blue.length = 8; | |
1192 | var->transp.length = 8; | |
1193 | var->transp.offset = 24; | |
1194 | break; | |
1195 | default: | |
1196 | return -EINVAL; | |
1197 | } | |
1198 | return 0; | |
1199 | } | |
1200 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1201 | ||
207fd329 DV |
1202 | /** |
1203 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
1204 | * @info: fbdev registered by the helper | |
1205 | * | |
1206 | * This will let fbcon do the mode init and is called at initialization time by | |
1207 | * the fbdev core when registering the driver, and later on through the hotplug | |
1208 | * callback. | |
1209 | */ | |
785b93ef DA |
1210 | int drm_fb_helper_set_par(struct fb_info *info) |
1211 | { | |
1212 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1213 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1214 | |
c50bfd08 DV |
1215 | if (oops_in_progress) |
1216 | return -EBUSY; | |
1217 | ||
5349ef31 | 1218 | if (var->pixclock != 0) { |
172e91f5 | 1219 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1220 | return -EINVAL; |
1221 | } | |
1222 | ||
5ea1f752 | 1223 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1224 | |
785b93ef DA |
1225 | return 0; |
1226 | } | |
1227 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1228 | ||
1edf0269 RC |
1229 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
1230 | struct fb_info *info) | |
1231 | { | |
1232 | struct drm_fb_helper *fb_helper = info->par; | |
1233 | struct drm_device *dev = fb_helper->dev; | |
1234 | struct drm_atomic_state *state; | |
1235 | int i, ret; | |
1236 | ||
1237 | state = drm_atomic_state_alloc(dev); | |
1238 | if (!state) | |
1239 | return -ENOMEM; | |
1240 | ||
1241 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1242 | retry: | |
1243 | for(i = 0; i < fb_helper->crtc_count; i++) { | |
1244 | struct drm_mode_set *mode_set; | |
1245 | ||
1246 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1247 | ||
1248 | mode_set->x = var->xoffset; | |
1249 | mode_set->y = var->yoffset; | |
1250 | ||
1251 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1252 | if (ret != 0) | |
1253 | goto fail; | |
1254 | } | |
1255 | ||
1256 | ret = drm_atomic_commit(state); | |
1257 | if (ret != 0) | |
1258 | goto fail; | |
1259 | ||
1260 | info->var.xoffset = var->xoffset; | |
1261 | info->var.yoffset = var->yoffset; | |
1262 | ||
1263 | return 0; | |
1264 | ||
1265 | fail: | |
1266 | if (ret == -EDEADLK) | |
1267 | goto backoff; | |
1268 | ||
1269 | drm_atomic_state_free(state); | |
1270 | ||
1271 | return ret; | |
1272 | ||
1273 | backoff: | |
1274 | drm_atomic_state_clear(state); | |
1275 | drm_atomic_legacy_backoff(state); | |
1276 | ||
1277 | goto retry; | |
1278 | } | |
1279 | ||
207fd329 DV |
1280 | /** |
1281 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
1282 | * @var: updated screen information | |
1283 | * @info: fbdev registered by the helper | |
1284 | */ | |
785b93ef DA |
1285 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1286 | struct fb_info *info) | |
1287 | { | |
1288 | struct drm_fb_helper *fb_helper = info->par; | |
1289 | struct drm_device *dev = fb_helper->dev; | |
1290 | struct drm_mode_set *modeset; | |
785b93ef DA |
1291 | int ret = 0; |
1292 | int i; | |
1293 | ||
c50bfd08 | 1294 | if (oops_in_progress) |
9aa609e1 | 1295 | return -EBUSY; |
c50bfd08 DV |
1296 | |
1297 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1298 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1299 | drm_modeset_unlock_all(dev); | |
1300 | return -EBUSY; | |
1301 | } | |
1302 | ||
1edf0269 RC |
1303 | if (fb_helper->atomic) { |
1304 | ret = pan_display_atomic(var, info); | |
1305 | goto unlock; | |
1306 | } | |
1307 | ||
8be48d92 | 1308 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1309 | modeset = &fb_helper->crtc_info[i].mode_set; |
1310 | ||
1311 | modeset->x = var->xoffset; | |
1312 | modeset->y = var->yoffset; | |
1313 | ||
1314 | if (modeset->num_connectors) { | |
2d13b679 | 1315 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1316 | if (!ret) { |
1317 | info->var.xoffset = var->xoffset; | |
1318 | info->var.yoffset = var->yoffset; | |
1319 | } | |
1320 | } | |
1321 | } | |
1edf0269 | 1322 | unlock: |
84849903 | 1323 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1324 | return ret; |
1325 | } | |
1326 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1327 | ||
8acf658a | 1328 | /* |
207fd329 DV |
1329 | * Allocates the backing storage and sets up the fbdev info structure through |
1330 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1331 | * notifier. | |
8acf658a | 1332 | */ |
de1ace5b DV |
1333 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1334 | int preferred_bpp) | |
785b93ef | 1335 | { |
8acf658a | 1336 | int ret = 0; |
785b93ef | 1337 | int crtc_count = 0; |
4abe3520 | 1338 | int i; |
785b93ef | 1339 | struct fb_info *info; |
38651674 | 1340 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1341 | int gamma_size = 0; |
38651674 DA |
1342 | |
1343 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1344 | sizes.surface_depth = 24; | |
1345 | sizes.surface_bpp = 32; | |
1346 | sizes.fb_width = (unsigned)-1; | |
1347 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 1348 | |
b8c00ac5 DA |
1349 | /* if driver picks 8 or 16 by default use that |
1350 | for both depth/bpp */ | |
96081cdf | 1351 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1352 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1353 | |
785b93ef | 1354 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
1355 | for (i = 0; i < fb_helper->connector_count; i++) { |
1356 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 1357 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1358 | |
eaf99c74 | 1359 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1360 | |
1361 | if (cmdline_mode->bpp_specified) { | |
1362 | switch (cmdline_mode->bpp) { | |
1363 | case 8: | |
38651674 | 1364 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1365 | break; |
1366 | case 15: | |
38651674 DA |
1367 | sizes.surface_depth = 15; |
1368 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1369 | break; |
1370 | case 16: | |
38651674 | 1371 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1372 | break; |
1373 | case 24: | |
38651674 | 1374 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1375 | break; |
1376 | case 32: | |
38651674 DA |
1377 | sizes.surface_depth = 24; |
1378 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1379 | break; |
1380 | } | |
1381 | break; | |
1382 | } | |
1383 | } | |
1384 | ||
8be48d92 DA |
1385 | crtc_count = 0; |
1386 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1387 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1388 | struct drm_mode_set *mode_set; |
1389 | int x, y, j; | |
1390 | /* in case of tile group, are we the last tile vert or horiz? | |
1391 | * If no tile group you are always the last one both vertically | |
1392 | * and horizontally | |
1393 | */ | |
1394 | bool lastv = true, lasth = true; | |
675c8328 | 1395 | |
8be48d92 | 1396 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1397 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1398 | |
1399 | if (!desired_mode) | |
1400 | continue; | |
1401 | ||
1402 | crtc_count++; | |
1403 | ||
b0ee9e7f DA |
1404 | x = fb_helper->crtc_info[i].x; |
1405 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1406 | |
1407 | if (gamma_size == 0) | |
1408 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1409 | ||
1410 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1411 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1412 | |
1413 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1414 | struct drm_connector *connector = mode_set->connectors[j]; | |
1415 | if (connector->has_tile) { | |
1416 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1417 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1418 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1419 | break; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | if (lasth) | |
1424 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1425 | if (lastv) | |
1426 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1427 | } |
1428 | ||
38651674 | 1429 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1430 | /* hmm everyone went away - assume VGA cable just fell out |
1431 | and will come back later. */ | |
eb1f8e4f | 1432 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1433 | sizes.fb_width = sizes.surface_width = 1024; |
1434 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1435 | } |
1436 | ||
38651674 | 1437 | /* push down into drivers */ |
8acf658a DV |
1438 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1439 | if (ret < 0) | |
1440 | return ret; | |
785b93ef | 1441 | |
38651674 | 1442 | info = fb_helper->fbdev; |
785b93ef | 1443 | |
7e53f3a4 DV |
1444 | /* |
1445 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1446 | * events, but at init time drm_setup_crtcs needs to be called before | |
1447 | * the fb is allocated (since we need to figure out the desired size of | |
1448 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1449 | * here again. | |
1450 | */ | |
96081cdf | 1451 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1452 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1453 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1454 | ||
785b93ef | 1455 | |
8acf658a DV |
1456 | info->var.pixclock = 0; |
1457 | if (register_framebuffer(info) < 0) | |
1458 | return -EINVAL; | |
38651674 | 1459 | |
8acf658a DV |
1460 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1461 | info->node, info->fix.id); | |
785b93ef | 1462 | |
785b93ef | 1463 | if (list_empty(&kernel_fb_helper_list)) { |
785b93ef DA |
1464 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
1465 | } | |
8acf658a DV |
1466 | |
1467 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1468 | |
785b93ef DA |
1469 | return 0; |
1470 | } | |
785b93ef | 1471 | |
207fd329 DV |
1472 | /** |
1473 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1474 | * @info: fbdev registered by the helper | |
1475 | * @pitch: desired pitch | |
1476 | * @depth: desired depth | |
1477 | * | |
1478 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1479 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1480 | * additional constraints need to set up their own limits. | |
1481 | * | |
1482 | * Drivers should call this (or their equivalent setup code) from their | |
1483 | * ->fb_probe callback. | |
1484 | */ | |
3632ef89 DA |
1485 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1486 | uint32_t depth) | |
1487 | { | |
1488 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1489 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1490 | FB_VISUAL_TRUECOLOR; | |
1491 | info->fix.mmio_start = 0; | |
1492 | info->fix.mmio_len = 0; | |
1493 | info->fix.type_aux = 0; | |
1494 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1495 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1496 | info->fix.ywrapstep = 0; | |
1497 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1498 | |
1499 | info->fix.line_length = pitch; | |
1500 | return; | |
1501 | } | |
1502 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1503 | ||
207fd329 DV |
1504 | /** |
1505 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1506 | * @info: fbdev instance to set up | |
1507 | * @fb_helper: fb helper instance to use as template | |
1508 | * @fb_width: desired fb width | |
1509 | * @fb_height: desired fb height | |
1510 | * | |
1511 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1512 | * and the drm framebuffer allocated in fb_helper->fb. | |
1513 | * | |
1514 | * Drivers should call this (or their equivalent setup code) from their | |
1515 | * ->fb_probe callback after having allocated the fbdev backing | |
1516 | * storage framebuffer. | |
1517 | */ | |
38651674 | 1518 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1519 | uint32_t fb_width, uint32_t fb_height) |
1520 | { | |
38651674 DA |
1521 | struct drm_framebuffer *fb = fb_helper->fb; |
1522 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1523 | info->var.xres_virtual = fb->width; |
1524 | info->var.yres_virtual = fb->height; | |
1525 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1526 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1527 | info->var.xoffset = 0; |
1528 | info->var.yoffset = 0; | |
1529 | info->var.activate = FB_ACTIVATE_NOW; | |
1530 | info->var.height = -1; | |
1531 | info->var.width = -1; | |
1532 | ||
1533 | switch (fb->depth) { | |
1534 | case 8: | |
1535 | info->var.red.offset = 0; | |
1536 | info->var.green.offset = 0; | |
1537 | info->var.blue.offset = 0; | |
1538 | info->var.red.length = 8; /* 8bit DAC */ | |
1539 | info->var.green.length = 8; | |
1540 | info->var.blue.length = 8; | |
1541 | info->var.transp.offset = 0; | |
1542 | info->var.transp.length = 0; | |
1543 | break; | |
1544 | case 15: | |
1545 | info->var.red.offset = 10; | |
1546 | info->var.green.offset = 5; | |
1547 | info->var.blue.offset = 0; | |
1548 | info->var.red.length = 5; | |
1549 | info->var.green.length = 5; | |
1550 | info->var.blue.length = 5; | |
1551 | info->var.transp.offset = 15; | |
1552 | info->var.transp.length = 1; | |
1553 | break; | |
1554 | case 16: | |
1555 | info->var.red.offset = 11; | |
1556 | info->var.green.offset = 5; | |
1557 | info->var.blue.offset = 0; | |
1558 | info->var.red.length = 5; | |
1559 | info->var.green.length = 6; | |
1560 | info->var.blue.length = 5; | |
1561 | info->var.transp.offset = 0; | |
1562 | break; | |
1563 | case 24: | |
1564 | info->var.red.offset = 16; | |
1565 | info->var.green.offset = 8; | |
1566 | info->var.blue.offset = 0; | |
1567 | info->var.red.length = 8; | |
1568 | info->var.green.length = 8; | |
1569 | info->var.blue.length = 8; | |
1570 | info->var.transp.offset = 0; | |
1571 | info->var.transp.length = 0; | |
1572 | break; | |
1573 | case 32: | |
1574 | info->var.red.offset = 16; | |
1575 | info->var.green.offset = 8; | |
1576 | info->var.blue.offset = 0; | |
1577 | info->var.red.length = 8; | |
1578 | info->var.green.length = 8; | |
1579 | info->var.blue.length = 8; | |
1580 | info->var.transp.offset = 24; | |
1581 | info->var.transp.length = 8; | |
1582 | break; | |
1583 | default: | |
1584 | break; | |
1585 | } | |
1586 | ||
1587 | info->var.xres = fb_width; | |
1588 | info->var.yres = fb_height; | |
1589 | } | |
1590 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1591 | |
0b4c0f3f DA |
1592 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1593 | uint32_t maxX, | |
1594 | uint32_t maxY) | |
38651674 DA |
1595 | { |
1596 | struct drm_connector *connector; | |
1597 | int count = 0; | |
0b4c0f3f | 1598 | int i; |
38651674 | 1599 | |
0b4c0f3f DA |
1600 | for (i = 0; i < fb_helper->connector_count; i++) { |
1601 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1602 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1603 | } | |
1604 | ||
1605 | return count; | |
1606 | } | |
1607 | ||
2f1046f3 | 1608 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1609 | { |
1610 | struct drm_display_mode *mode; | |
1611 | ||
0b4c0f3f | 1612 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1613 | if (mode->hdisplay > width || |
1614 | mode->vdisplay > height) | |
38651674 DA |
1615 | continue; |
1616 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1617 | return mode; | |
1618 | } | |
1619 | return NULL; | |
1620 | } | |
2f1046f3 | 1621 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1622 | |
0b4c0f3f | 1623 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1624 | { |
eaf99c74 | 1625 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1626 | } |
1627 | ||
2f1046f3 | 1628 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1629 | int width, int height) |
38651674 | 1630 | { |
1794d257 | 1631 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1632 | struct drm_display_mode *mode; |
c683f427 | 1633 | bool prefer_non_interlace; |
38651674 | 1634 | |
eaf99c74 | 1635 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1636 | if (cmdline_mode->specified == false) |
f3af5c7d | 1637 | return NULL; |
38651674 DA |
1638 | |
1639 | /* attempt to find a matching mode in the list of modes | |
1640 | * we have gotten so far, if not add a CVT mode that conforms | |
1641 | */ | |
1642 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1643 | goto create_mode; | |
1644 | ||
c683f427 | 1645 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1646 | again: |
0b4c0f3f | 1647 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1648 | /* check width/height */ |
1649 | if (mode->hdisplay != cmdline_mode->xres || | |
1650 | mode->vdisplay != cmdline_mode->yres) | |
1651 | continue; | |
1652 | ||
1653 | if (cmdline_mode->refresh_specified) { | |
1654 | if (mode->vrefresh != cmdline_mode->refresh) | |
1655 | continue; | |
1656 | } | |
1657 | ||
1658 | if (cmdline_mode->interlace) { | |
1659 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1660 | continue; | |
c683f427 TI |
1661 | } else if (prefer_non_interlace) { |
1662 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1663 | continue; | |
38651674 DA |
1664 | } |
1665 | return mode; | |
1666 | } | |
1667 | ||
c683f427 TI |
1668 | if (prefer_non_interlace) { |
1669 | prefer_non_interlace = false; | |
1670 | goto again; | |
1671 | } | |
1672 | ||
38651674 | 1673 | create_mode: |
1794d257 CW |
1674 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1675 | cmdline_mode); | |
0b4c0f3f | 1676 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1677 | return mode; |
1678 | } | |
2f1046f3 | 1679 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1680 | |
1681 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1682 | { | |
1683 | bool enable; | |
1684 | ||
96081cdf | 1685 | if (strict) |
38651674 | 1686 | enable = connector->status == connector_status_connected; |
96081cdf | 1687 | else |
38651674 | 1688 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1689 | |
38651674 DA |
1690 | return enable; |
1691 | } | |
1692 | ||
0b4c0f3f DA |
1693 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1694 | bool *enabled) | |
38651674 DA |
1695 | { |
1696 | bool any_enabled = false; | |
1697 | struct drm_connector *connector; | |
1698 | int i = 0; | |
1699 | ||
0b4c0f3f DA |
1700 | for (i = 0; i < fb_helper->connector_count; i++) { |
1701 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1702 | enabled[i] = drm_connector_enabled(connector, true); |
1703 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1704 | enabled[i] ? "yes" : "no"); | |
1705 | any_enabled |= enabled[i]; | |
38651674 DA |
1706 | } |
1707 | ||
1708 | if (any_enabled) | |
1709 | return; | |
1710 | ||
0b4c0f3f DA |
1711 | for (i = 0; i < fb_helper->connector_count; i++) { |
1712 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1713 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1714 | } |
1715 | } | |
1716 | ||
1d42bbc8 DA |
1717 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1718 | struct drm_display_mode **modes, | |
b0ee9e7f | 1719 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1720 | bool *enabled, int width, int height) |
1721 | { | |
1722 | int count, i, j; | |
1723 | bool can_clone = false; | |
1724 | struct drm_fb_helper_connector *fb_helper_conn; | |
1725 | struct drm_display_mode *dmt_mode, *mode; | |
1726 | ||
1727 | /* only contemplate cloning in the single crtc case */ | |
1728 | if (fb_helper->crtc_count > 1) | |
1729 | return false; | |
1730 | ||
1731 | count = 0; | |
1732 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1733 | if (enabled[i]) | |
1734 | count++; | |
1735 | } | |
1736 | ||
1737 | /* only contemplate cloning if more than one connector is enabled */ | |
1738 | if (count <= 1) | |
1739 | return false; | |
1740 | ||
1741 | /* check the command line or if nothing common pick 1024x768 */ | |
1742 | can_clone = true; | |
1743 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1744 | if (!enabled[i]) | |
1745 | continue; | |
1746 | fb_helper_conn = fb_helper->connector_info[i]; | |
1747 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1748 | if (!modes[i]) { | |
1749 | can_clone = false; | |
1750 | break; | |
1751 | } | |
1752 | for (j = 0; j < i; j++) { | |
1753 | if (!enabled[j]) | |
1754 | continue; | |
1755 | if (!drm_mode_equal(modes[j], modes[i])) | |
1756 | can_clone = false; | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | if (can_clone) { | |
1761 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1762 | return true; | |
1763 | } | |
1764 | ||
1765 | /* try and find a 1024x768 mode on each connector */ | |
1766 | can_clone = true; | |
f6e252ba | 1767 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1768 | |
1769 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1770 | ||
1771 | if (!enabled[i]) | |
1772 | continue; | |
1773 | ||
1774 | fb_helper_conn = fb_helper->connector_info[i]; | |
1775 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1776 | if (drm_mode_equal(mode, dmt_mode)) | |
1777 | modes[i] = mode; | |
1778 | } | |
1779 | if (!modes[i]) | |
1780 | can_clone = false; | |
1781 | } | |
1782 | ||
1783 | if (can_clone) { | |
1784 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1785 | return true; | |
1786 | } | |
1787 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1788 | return false; | |
1789 | } | |
1790 | ||
b0ee9e7f DA |
1791 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1792 | struct drm_display_mode **modes, | |
1793 | struct drm_fb_offset *offsets, | |
1794 | int idx, | |
1795 | int h_idx, int v_idx) | |
1796 | { | |
1797 | struct drm_fb_helper_connector *fb_helper_conn; | |
1798 | int i; | |
1799 | int hoffset = 0, voffset = 0; | |
1800 | ||
1801 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1802 | fb_helper_conn = fb_helper->connector_info[i]; | |
1803 | if (!fb_helper_conn->connector->has_tile) | |
1804 | continue; | |
1805 | ||
1806 | if (!modes[i] && (h_idx || v_idx)) { | |
1807 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
1808 | fb_helper_conn->connector->base.id); | |
1809 | continue; | |
1810 | } | |
1811 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
1812 | hoffset += modes[i]->hdisplay; | |
1813 | ||
1814 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
1815 | voffset += modes[i]->vdisplay; | |
1816 | } | |
1817 | offsets[idx].x = hoffset; | |
1818 | offsets[idx].y = voffset; | |
1819 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
1820 | return 0; | |
1821 | } | |
1822 | ||
0b4c0f3f | 1823 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 1824 | struct drm_display_mode **modes, |
b0ee9e7f | 1825 | struct drm_fb_offset *offsets, |
38651674 DA |
1826 | bool *enabled, int width, int height) |
1827 | { | |
0b4c0f3f DA |
1828 | struct drm_fb_helper_connector *fb_helper_conn; |
1829 | int i; | |
b0ee9e7f DA |
1830 | uint64_t conn_configured = 0, mask; |
1831 | int tile_pass = 0; | |
1832 | mask = (1 << fb_helper->connector_count) - 1; | |
1833 | retry: | |
0b4c0f3f DA |
1834 | for (i = 0; i < fb_helper->connector_count; i++) { |
1835 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1836 | |
b0ee9e7f DA |
1837 | if (conn_configured & (1 << i)) |
1838 | continue; | |
1839 | ||
1840 | if (enabled[i] == false) { | |
1841 | conn_configured |= (1 << i); | |
1842 | continue; | |
1843 | } | |
1844 | ||
1845 | /* first pass over all the untiled connectors */ | |
1846 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 1847 | continue; |
38651674 | 1848 | |
b0ee9e7f DA |
1849 | if (tile_pass == 1) { |
1850 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
1851 | fb_helper_conn->connector->tile_v_loc != 0) | |
1852 | continue; | |
1853 | ||
1854 | } else { | |
1855 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && | |
1856 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) | |
1857 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
1858 | continue; | |
1859 | ||
1860 | /* find the tile offsets for this pass - need | |
1861 | to find all tiles left and above */ | |
1862 | drm_get_tile_offsets(fb_helper, modes, offsets, | |
1863 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
1864 | } | |
38651674 | 1865 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 1866 | fb_helper_conn->connector->base.id); |
38651674 DA |
1867 | |
1868 | /* got for command line mode first */ | |
0b4c0f3f | 1869 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 | 1870 | if (!modes[i]) { |
b0ee9e7f DA |
1871 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
1872 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 1873 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
1874 | } |
1875 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1876 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1877 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1878 | break; |
1879 | } | |
1880 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1881 | "none"); | |
b0ee9e7f DA |
1882 | conn_configured |= (1 << i); |
1883 | } | |
1884 | ||
1885 | if ((conn_configured & mask) != mask) { | |
1886 | tile_pass++; | |
1887 | goto retry; | |
38651674 DA |
1888 | } |
1889 | return true; | |
1890 | } | |
1891 | ||
8be48d92 DA |
1892 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1893 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1894 | struct drm_display_mode **modes, |
1895 | int n, int width, int height) | |
1896 | { | |
1897 | int c, o; | |
8be48d92 | 1898 | struct drm_device *dev = fb_helper->dev; |
38651674 | 1899 | struct drm_connector *connector; |
be26a66d | 1900 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 1901 | struct drm_encoder *encoder; |
38651674 | 1902 | int my_score, best_score, score; |
8be48d92 | 1903 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 1904 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 1905 | |
0b4c0f3f | 1906 | if (n == fb_helper->connector_count) |
38651674 | 1907 | return 0; |
0b4c0f3f DA |
1908 | |
1909 | fb_helper_conn = fb_helper->connector_info[n]; | |
1910 | connector = fb_helper_conn->connector; | |
38651674 DA |
1911 | |
1912 | best_crtcs[n] = NULL; | |
8be48d92 | 1913 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
1914 | if (modes[n] == NULL) |
1915 | return best_score; | |
1916 | ||
8be48d92 DA |
1917 | crtcs = kzalloc(dev->mode_config.num_connector * |
1918 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); | |
38651674 DA |
1919 | if (!crtcs) |
1920 | return best_score; | |
1921 | ||
1922 | my_score = 1; | |
1923 | if (connector->status == connector_status_connected) | |
1924 | my_score++; | |
0b4c0f3f | 1925 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 1926 | my_score++; |
0b4c0f3f | 1927 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
1928 | my_score++; |
1929 | ||
1930 | connector_funcs = connector->helper_private; | |
1931 | encoder = connector_funcs->best_encoder(connector); | |
1932 | if (!encoder) | |
1933 | goto out; | |
1934 | ||
38651674 DA |
1935 | /* select a crtc for this connector and then attempt to configure |
1936 | remaining connectors */ | |
8be48d92 DA |
1937 | for (c = 0; c < fb_helper->crtc_count; c++) { |
1938 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 1939 | |
96081cdf | 1940 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 1941 | continue; |
38651674 DA |
1942 | |
1943 | for (o = 0; o < n; o++) | |
1944 | if (best_crtcs[o] == crtc) | |
1945 | break; | |
1946 | ||
1947 | if (o < n) { | |
1d42bbc8 DA |
1948 | /* ignore cloning unless only a single crtc */ |
1949 | if (fb_helper->crtc_count > 1) | |
1950 | continue; | |
1951 | ||
1952 | if (!drm_mode_equal(modes[o], modes[n])) | |
1953 | continue; | |
38651674 DA |
1954 | } |
1955 | ||
1956 | crtcs[n] = crtc; | |
8be48d92 DA |
1957 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
1958 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
1959 | width, height); |
1960 | if (score > best_score) { | |
38651674 DA |
1961 | best_score = score; |
1962 | memcpy(best_crtcs, crtcs, | |
1963 | dev->mode_config.num_connector * | |
8be48d92 | 1964 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 1965 | } |
38651674 DA |
1966 | } |
1967 | out: | |
1968 | kfree(crtcs); | |
1969 | return best_score; | |
1970 | } | |
1971 | ||
8be48d92 | 1972 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 1973 | { |
8be48d92 DA |
1974 | struct drm_device *dev = fb_helper->dev; |
1975 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 1976 | struct drm_display_mode **modes; |
b0ee9e7f | 1977 | struct drm_fb_offset *offsets; |
8be48d92 | 1978 | struct drm_mode_set *modeset; |
38651674 DA |
1979 | bool *enabled; |
1980 | int width, height; | |
11e17a08 | 1981 | int i; |
38651674 DA |
1982 | |
1983 | DRM_DEBUG_KMS("\n"); | |
1984 | ||
1985 | width = dev->mode_config.max_width; | |
1986 | height = dev->mode_config.max_height; | |
1987 | ||
38651674 | 1988 | crtcs = kcalloc(dev->mode_config.num_connector, |
8be48d92 | 1989 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
1990 | modes = kcalloc(dev->mode_config.num_connector, |
1991 | sizeof(struct drm_display_mode *), GFP_KERNEL); | |
b0ee9e7f DA |
1992 | offsets = kcalloc(dev->mode_config.num_connector, |
1993 | sizeof(struct drm_fb_offset), GFP_KERNEL); | |
38651674 DA |
1994 | enabled = kcalloc(dev->mode_config.num_connector, |
1995 | sizeof(bool), GFP_KERNEL); | |
b0ee9e7f | 1996 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
1997 | DRM_ERROR("Memory allocation failed\n"); |
1998 | goto out; | |
1999 | } | |
2000 | ||
38651674 | 2001 | |
0b4c0f3f | 2002 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2003 | |
11e17a08 JB |
2004 | if (!(fb_helper->funcs->initial_config && |
2005 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2006 | offsets, |
11e17a08 JB |
2007 | enabled, width, height))) { |
2008 | memset(modes, 0, dev->mode_config.num_connector*sizeof(modes[0])); | |
2009 | memset(crtcs, 0, dev->mode_config.num_connector*sizeof(crtcs[0])); | |
b0ee9e7f | 2010 | memset(offsets, 0, dev->mode_config.num_connector*sizeof(offsets[0])); |
11e17a08 | 2011 | |
b0ee9e7f DA |
2012 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2013 | enabled, width, height) && | |
2014 | !drm_target_preferred(fb_helper, modes, offsets, | |
2015 | enabled, width, height)) | |
1d42bbc8 | 2016 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2017 | |
11e17a08 JB |
2018 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2019 | width, height); | |
38651674 | 2020 | |
11e17a08 JB |
2021 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2022 | } | |
8be48d92 DA |
2023 | |
2024 | /* need to set the modesets up here for use later */ | |
2025 | /* fill out the connector<->crtc mappings into the modesets */ | |
2026 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2027 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2028 | modeset->num_connectors = 0; | |
7e53f3a4 | 2029 | modeset->fb = NULL; |
8be48d92 | 2030 | } |
38651674 | 2031 | |
0b4c0f3f | 2032 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 2033 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2034 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2035 | struct drm_fb_offset *offset = &offsets[i]; |
8be48d92 | 2036 | modeset = &fb_crtc->mode_set; |
38651674 | 2037 | |
8be48d92 | 2038 | if (mode && fb_crtc) { |
b0ee9e7f DA |
2039 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2040 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
8be48d92 | 2041 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2042 | fb_crtc->x = offset->x; |
2043 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2044 | if (modeset->mode) |
2045 | drm_mode_destroy(dev, modeset->mode); | |
2046 | modeset->mode = drm_mode_duplicate(dev, | |
2047 | fb_crtc->desired_mode); | |
0b4c0f3f | 2048 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 2049 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2050 | modeset->x = offset->x; |
2051 | modeset->y = offset->y; | |
38651674 | 2052 | } |
38651674 DA |
2053 | } |
2054 | ||
7e53f3a4 DV |
2055 | /* Clear out any old modes if there are no more connected outputs. */ |
2056 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2057 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2058 | if (modeset->num_connectors == 0) { | |
2059 | BUG_ON(modeset->fb); | |
7e53f3a4 DV |
2060 | if (modeset->mode) |
2061 | drm_mode_destroy(dev, modeset->mode); | |
2062 | modeset->mode = NULL; | |
2063 | } | |
2064 | } | |
8c5eaca0 | 2065 | out: |
38651674 DA |
2066 | kfree(crtcs); |
2067 | kfree(modes); | |
b0ee9e7f | 2068 | kfree(offsets); |
38651674 DA |
2069 | kfree(enabled); |
2070 | } | |
2071 | ||
2072 | /** | |
207fd329 | 2073 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2074 | * @fb_helper: fb_helper device struct |
2075 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2076 | * |
d0ddc033 | 2077 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2078 | * At the moment, this is a cloned configuration across all heads with |
2079 | * a new framebuffer object as the backing store. | |
2080 | * | |
207fd329 DV |
2081 | * Note that this also registers the fbdev and so allows userspace to call into |
2082 | * the driver through the fbdev interfaces. | |
2083 | * | |
2084 | * This function will call down into the ->fb_probe callback to let | |
2085 | * the driver allocate and initialize the fbdev info structure and the drm | |
2086 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
2087 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
2088 | * values for the fbdev info structure. | |
2089 | * | |
38651674 DA |
2090 | * RETURNS: |
2091 | * Zero if everything went ok, nonzero otherwise. | |
2092 | */ | |
01934c2a | 2093 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2094 | { |
8be48d92 | 2095 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
2096 | int count = 0; |
2097 | ||
f64c5573 DV |
2098 | if (!drm_fbdev_emulation) |
2099 | return 0; | |
2100 | ||
53f1904b | 2101 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
2102 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
2103 | dev->mode_config.max_width, | |
2104 | dev->mode_config.max_height); | |
53f1904b | 2105 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
2106 | /* |
2107 | * we shouldn't end up with no modes here. | |
2108 | */ | |
96081cdf | 2109 | if (count == 0) |
d56b1b9d | 2110 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 2111 | |
8be48d92 | 2112 | drm_setup_crtcs(fb_helper); |
38651674 | 2113 | |
4abe3520 | 2114 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 2115 | } |
8be48d92 | 2116 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2117 | |
7394371d CW |
2118 | /** |
2119 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2120 | * probing all the outputs attached to the fb |
7394371d CW |
2121 | * @fb_helper: the drm_fb_helper |
2122 | * | |
7394371d CW |
2123 | * Scan the connectors attached to the fb_helper and try to put together a |
2124 | * setup after *notification of a change in output configuration. | |
2125 | * | |
207fd329 DV |
2126 | * Called at runtime, takes the mode config locks to be able to check/change the |
2127 | * modeset configuration. Must be run from process context (which usually means | |
2128 | * either the output polling work or a work item launched from the driver's | |
2129 | * hotplug interrupt). | |
2130 | * | |
50c3dc97 DV |
2131 | * Note that drivers may call this even before calling |
2132 | * drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows | |
2133 | * for a race-free fbcon setup and will make sure that the fbdev emulation will | |
2134 | * not miss any hotplug events. | |
207fd329 | 2135 | * |
7394371d CW |
2136 | * RETURNS: |
2137 | * 0 on success and a non-zero error code otherwise. | |
2138 | */ | |
2139 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2140 | { |
7394371d | 2141 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 2142 | u32 max_width, max_height; |
5c4426a7 | 2143 | |
f64c5573 DV |
2144 | if (!drm_fbdev_emulation) |
2145 | return 0; | |
2146 | ||
89ced125 | 2147 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
50c3dc97 | 2148 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2149 | fb_helper->delayed_hotplug = true; |
89ced125 | 2150 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 2151 | return 0; |
4abe3520 | 2152 | } |
eb1f8e4f | 2153 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2154 | |
eb1f8e4f DA |
2155 | max_width = fb_helper->fb->width; |
2156 | max_height = fb_helper->fb->height; | |
5c4426a7 | 2157 | |
51bbd276 | 2158 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
2159 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
2160 | ||
2161 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 2162 | drm_setup_crtcs(fb_helper); |
84849903 | 2163 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
2164 | drm_fb_helper_set_par(fb_helper->fbdev); |
2165 | ||
2166 | return 0; | |
5c4426a7 | 2167 | } |
eb1f8e4f | 2168 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2169 | |
6a108a14 | 2170 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2171 | * but the module doesn't depend on any fb console symbols. At least |
2172 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2173 | */ | |
6a108a14 | 2174 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2175 | static int __init drm_fb_helper_modinit(void) |
2176 | { | |
2177 | const char *name = "fbcon"; | |
2178 | struct module *fbcon; | |
2179 | ||
2180 | mutex_lock(&module_mutex); | |
2181 | fbcon = find_module(name); | |
2182 | mutex_unlock(&module_mutex); | |
2183 | ||
2184 | if (!fbcon) | |
2185 | request_module_nowait(name); | |
2186 | return 0; | |
2187 | } | |
2188 | ||
2189 | module_init(drm_fb_helper_modinit); | |
2190 | #endif |