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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 | ||
03f9abb2 AD |
441 | if (crtc->funcs->cursor_set2) { |
442 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
443 | if (ret) | |
48f87dd1 | 444 | return ret; |
03f9abb2 | 445 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
446 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
447 | if (ret) | |
b7bdf0a8 | 448 | return ret; |
3858bc5d VS |
449 | } |
450 | ||
2d13b679 | 451 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 452 | if (ret) |
b7bdf0a8 | 453 | return ret; |
e8e7a2b8 | 454 | } |
b7bdf0a8 DV |
455 | |
456 | return 0; | |
e8e7a2b8 | 457 | } |
5ea1f752 RC |
458 | |
459 | /** | |
460 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
461 | * @fb_helper: fbcon to restore | |
462 | * | |
463 | * This should be called from driver's drm ->lastclose callback | |
464 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
465 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
466 | * |
467 | * RETURNS: | |
468 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 469 | */ |
b7bdf0a8 | 470 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
471 | { |
472 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
473 | bool do_delayed; |
474 | int ret; | |
e2809c7d | 475 | |
f64c5573 DV |
476 | if (!drm_fbdev_emulation) |
477 | return -ENODEV; | |
478 | ||
5ea1f752 RC |
479 | drm_modeset_lock_all(dev); |
480 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
481 | |
482 | do_delayed = fb_helper->delayed_hotplug; | |
483 | if (do_delayed) | |
484 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 485 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
486 | |
487 | if (do_delayed) | |
488 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
489 | return ret; |
490 | } | |
491 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 492 | |
2c4124fd GU |
493 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
494 | { | |
495 | struct drm_device *dev = fb_helper->dev; | |
496 | struct drm_crtc *crtc; | |
497 | int bound = 0, crtcs_bound = 0; | |
498 | ||
499 | /* Sometimes user space wants everything disabled, so don't steal the | |
500 | * display if there's a master. */ | |
501 | if (dev->primary->master) | |
502 | return false; | |
503 | ||
504 | drm_for_each_crtc(crtc, dev) { | |
505 | if (crtc->primary->fb) | |
506 | crtcs_bound++; | |
507 | if (crtc->primary->fb == fb_helper->fb) | |
508 | bound++; | |
509 | } | |
510 | ||
511 | if (bound < crtcs_bound) | |
512 | return false; | |
513 | ||
514 | return true; | |
515 | } | |
516 | ||
517 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
518 | /* |
519 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
520 | * and panic handling. | |
521 | */ | |
78b9c353 | 522 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 523 | { |
785b93ef DA |
524 | bool ret, error = false; |
525 | struct drm_fb_helper *helper; | |
526 | ||
527 | if (list_empty(&kernel_fb_helper_list)) | |
528 | return false; | |
529 | ||
530 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
531 | struct drm_device *dev = helper->dev; |
532 | ||
533 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
534 | continue; | |
535 | ||
dd908c86 | 536 | drm_modeset_lock_all(dev); |
3d9e35a9 | 537 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
538 | if (ret) |
539 | error = true; | |
cb597bb3 | 540 | drm_modeset_unlock_all(dev); |
785b93ef DA |
541 | } |
542 | return error; | |
543 | } | |
544 | ||
785b93ef DA |
545 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
546 | { | |
d21bf469 DV |
547 | bool ret; |
548 | ret = drm_fb_helper_force_kernel_mode(); | |
549 | if (ret == true) | |
550 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
551 | } |
552 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
553 | ||
1495cc9d | 554 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
555 | { |
556 | schedule_work(&drm_fb_helper_restore_work); | |
557 | } | |
558 | ||
559 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
560 | .handler = drm_fb_helper_sysrq, | |
561 | .help_msg = "force-fb(V)", | |
562 | .action_msg = "Restore framebuffer console", | |
563 | }; | |
b8c40d62 RD |
564 | #else |
565 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 566 | #endif |
785b93ef | 567 | |
3a8148c5 | 568 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
569 | { |
570 | struct drm_fb_helper *fb_helper = info->par; | |
571 | struct drm_device *dev = fb_helper->dev; | |
572 | struct drm_crtc *crtc; | |
023eb571 | 573 | struct drm_connector *connector; |
023eb571 | 574 | int i, j; |
785b93ef DA |
575 | |
576 | /* | |
3a8148c5 | 577 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 578 | */ |
84849903 | 579 | drm_modeset_lock_all(dev); |
20c60c35 DV |
580 | if (!drm_fb_helper_is_bound(fb_helper)) { |
581 | drm_modeset_unlock_all(dev); | |
582 | return; | |
583 | } | |
584 | ||
e87b2c42 | 585 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 586 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 587 | |
8be48d92 DA |
588 | if (!crtc->enabled) |
589 | continue; | |
590 | ||
3a8148c5 | 591 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
592 | for (j = 0; j < fb_helper->connector_count; j++) { |
593 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 594 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 595 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 596 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 597 | } |
785b93ef | 598 | } |
84849903 | 599 | drm_modeset_unlock_all(dev); |
785b93ef DA |
600 | } |
601 | ||
207fd329 DV |
602 | /** |
603 | * drm_fb_helper_blank - implementation for ->fb_blank | |
604 | * @blank: desired blanking state | |
605 | * @info: fbdev registered by the helper | |
606 | */ | |
785b93ef DA |
607 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
608 | { | |
c50bfd08 DV |
609 | if (oops_in_progress) |
610 | return -EBUSY; | |
611 | ||
785b93ef | 612 | switch (blank) { |
731b5a15 | 613 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 614 | case FB_BLANK_UNBLANK: |
3a8148c5 | 615 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 616 | break; |
731b5a15 | 617 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 618 | case FB_BLANK_NORMAL: |
3a8148c5 | 619 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 620 | break; |
731b5a15 | 621 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 622 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 623 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 624 | break; |
731b5a15 | 625 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 626 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 627 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 628 | break; |
731b5a15 | 629 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 630 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 631 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
632 | break; |
633 | } | |
634 | return 0; | |
635 | } | |
636 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
637 | ||
638 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
639 | { | |
640 | int i; | |
641 | ||
0b4c0f3f DA |
642 | for (i = 0; i < helper->connector_count; i++) |
643 | kfree(helper->connector_info[i]); | |
644 | kfree(helper->connector_info); | |
a1b7736d | 645 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 646 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
647 | if (helper->crtc_info[i].mode_set.mode) |
648 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
649 | } | |
785b93ef DA |
650 | kfree(helper->crtc_info); |
651 | } | |
652 | ||
10a23102 TR |
653 | /** |
654 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
655 | * @dev: DRM device | |
656 | * @helper: driver-allocated fbdev helper structure to set up | |
657 | * @funcs: pointer to structure of functions associate with this helper | |
658 | * | |
659 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
660 | * useful to implement race-free initialization of the polling helpers. | |
661 | */ | |
662 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
663 | const struct drm_fb_helper_funcs *funcs) | |
664 | { | |
665 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
666 | helper->funcs = funcs; | |
667 | helper->dev = dev; | |
668 | } | |
669 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
670 | ||
207fd329 DV |
671 | /** |
672 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
673 | * @dev: drm device | |
674 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
675 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
676 | * @max_conn_count: max connector count | |
677 | * | |
678 | * This allocates the structures for the fbdev helper with the given limits. | |
679 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
680 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
681 | * to allow driver writes more control over the exact init sequence. | |
682 | * | |
10a23102 | 683 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
684 | * |
685 | * RETURNS: | |
686 | * Zero if everything went ok, nonzero otherwise. | |
687 | */ | |
4abe3520 DA |
688 | int drm_fb_helper_init(struct drm_device *dev, |
689 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 690 | int crtc_count, int max_conn_count) |
785b93ef | 691 | { |
785b93ef | 692 | struct drm_crtc *crtc; |
785b93ef DA |
693 | int i; |
694 | ||
f64c5573 DV |
695 | if (!drm_fbdev_emulation) |
696 | return 0; | |
697 | ||
04cfe97e XL |
698 | if (!max_conn_count) |
699 | return -EINVAL; | |
700 | ||
4abe3520 DA |
701 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
702 | if (!fb_helper->crtc_info) | |
785b93ef DA |
703 | return -ENOMEM; |
704 | ||
4abe3520 DA |
705 | fb_helper->crtc_count = crtc_count; |
706 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
707 | if (!fb_helper->connector_info) { | |
708 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
709 | return -ENOMEM; |
710 | } | |
65c2a89c | 711 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 712 | fb_helper->connector_count = 0; |
785b93ef DA |
713 | |
714 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 715 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
716 | kcalloc(max_conn_count, |
717 | sizeof(struct drm_connector *), | |
718 | GFP_KERNEL); | |
719 | ||
4a1b0714 | 720 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 721 | goto out_free; |
4abe3520 | 722 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
723 | } |
724 | ||
725 | i = 0; | |
6295d607 | 726 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 727 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
728 | i++; |
729 | } | |
e9ad3181 | 730 | |
bbb1e524 RC |
731 | fb_helper->atomic = !!drm_core_check_feature(dev, DRIVER_ATOMIC); |
732 | ||
785b93ef DA |
733 | return 0; |
734 | out_free: | |
4abe3520 | 735 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
736 | return -ENOMEM; |
737 | } | |
4abe3520 DA |
738 | EXPORT_SYMBOL(drm_fb_helper_init); |
739 | ||
b8017d6c AT |
740 | /** |
741 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
742 | * @fb_helper: driver-allocated fbdev helper | |
743 | * | |
744 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
745 | * by the driver within the fb_probe fb_helper callback function. | |
746 | * | |
747 | * RETURNS: | |
748 | * fb_info pointer if things went okay, pointer containing error code | |
749 | * otherwise | |
750 | */ | |
751 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
752 | { | |
753 | struct device *dev = fb_helper->dev->dev; | |
754 | struct fb_info *info; | |
755 | int ret; | |
756 | ||
757 | info = framebuffer_alloc(0, dev); | |
758 | if (!info) | |
759 | return ERR_PTR(-ENOMEM); | |
760 | ||
761 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
762 | if (ret) | |
763 | goto err_release; | |
764 | ||
765 | info->apertures = alloc_apertures(1); | |
766 | if (!info->apertures) { | |
767 | ret = -ENOMEM; | |
768 | goto err_free_cmap; | |
769 | } | |
770 | ||
771 | fb_helper->fbdev = info; | |
772 | ||
773 | return info; | |
774 | ||
775 | err_free_cmap: | |
776 | fb_dealloc_cmap(&info->cmap); | |
777 | err_release: | |
778 | framebuffer_release(info); | |
779 | return ERR_PTR(ret); | |
780 | } | |
781 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
782 | ||
783 | /** | |
784 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
785 | * @fb_helper: driver-allocated fbdev helper | |
786 | * | |
787 | * A wrapper around unregister_framebuffer, to release the fb_info | |
788 | * framebuffer device | |
789 | */ | |
790 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
791 | { | |
792 | if (fb_helper && fb_helper->fbdev) | |
793 | unregister_framebuffer(fb_helper->fbdev); | |
794 | } | |
795 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
796 | ||
797 | /** | |
798 | * drm_fb_helper_release_fbi - dealloc fb_info and its members | |
799 | * @fb_helper: driver-allocated fbdev helper | |
800 | * | |
801 | * A helper to free memory taken by fb_info and the members cmap and | |
802 | * apertures | |
803 | */ | |
804 | void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) | |
805 | { | |
806 | if (fb_helper) { | |
807 | struct fb_info *info = fb_helper->fbdev; | |
808 | ||
809 | if (info) { | |
810 | if (info->cmap.len) | |
811 | fb_dealloc_cmap(&info->cmap); | |
812 | framebuffer_release(info); | |
813 | } | |
814 | ||
815 | fb_helper->fbdev = NULL; | |
816 | } | |
817 | } | |
818 | EXPORT_SYMBOL(drm_fb_helper_release_fbi); | |
819 | ||
4abe3520 DA |
820 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
821 | { | |
f64c5573 DV |
822 | if (!drm_fbdev_emulation) |
823 | return; | |
824 | ||
4abe3520 DA |
825 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
826 | list_del(&fb_helper->kernel_fb_list); | |
827 | if (list_empty(&kernel_fb_helper_list)) { | |
4abe3520 DA |
828 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
829 | } | |
830 | } | |
831 | ||
832 | drm_fb_helper_crtc_free(fb_helper); | |
833 | ||
4abe3520 DA |
834 | } |
835 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 836 | |
47074ab7 AT |
837 | /** |
838 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
839 | * @fb_helper: driver-allocated fbdev helper | |
840 | * | |
841 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
842 | */ | |
843 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
844 | { | |
845 | if (fb_helper && fb_helper->fbdev) | |
846 | unlink_framebuffer(fb_helper->fbdev); | |
847 | } | |
848 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
849 | ||
cbb1a82e AT |
850 | /** |
851 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
852 | * @info: fb_info struct pointer | |
853 | * @buf: userspace buffer to read from framebuffer memory | |
854 | * @count: number of bytes to read from framebuffer memory | |
855 | * @ppos: read offset within framebuffer memory | |
856 | * | |
857 | * A wrapper around fb_sys_read implemented by fbdev core | |
858 | */ | |
859 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
860 | size_t count, loff_t *ppos) | |
861 | { | |
862 | return fb_sys_read(info, buf, count, ppos); | |
863 | } | |
864 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
865 | ||
866 | /** | |
867 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
868 | * @info: fb_info struct pointer | |
869 | * @buf: userspace buffer to write to framebuffer memory | |
870 | * @count: number of bytes to write to framebuffer memory | |
871 | * @ppos: write offset within framebuffer memory | |
872 | * | |
873 | * A wrapper around fb_sys_write implemented by fbdev core | |
874 | */ | |
875 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
876 | size_t count, loff_t *ppos) | |
877 | { | |
878 | return fb_sys_write(info, buf, count, ppos); | |
879 | } | |
880 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
881 | ||
742547b7 AT |
882 | /** |
883 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
884 | * @info: fbdev registered by the helper | |
885 | * @rect: info about rectangle to fill | |
886 | * | |
887 | * A wrapper around sys_fillrect implemented by fbdev core | |
888 | */ | |
889 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
890 | const struct fb_fillrect *rect) | |
891 | { | |
892 | sys_fillrect(info, rect); | |
893 | } | |
894 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
895 | ||
896 | /** | |
897 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
898 | * @info: fbdev registered by the helper | |
899 | * @area: info about area to copy | |
900 | * | |
901 | * A wrapper around sys_copyarea implemented by fbdev core | |
902 | */ | |
903 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
904 | const struct fb_copyarea *area) | |
905 | { | |
906 | sys_copyarea(info, area); | |
907 | } | |
908 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
909 | ||
910 | /** | |
911 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
912 | * @info: fbdev registered by the helper | |
913 | * @image: info about image to blit | |
914 | * | |
915 | * A wrapper around sys_imageblit implemented by fbdev core | |
916 | */ | |
917 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
918 | const struct fb_image *image) | |
919 | { | |
920 | sys_imageblit(info, image); | |
921 | } | |
922 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
923 | ||
924 | /** | |
925 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
926 | * @info: fbdev registered by the helper | |
927 | * @rect: info about rectangle to fill | |
928 | * | |
929 | * A wrapper around cfb_imageblit implemented by fbdev core | |
930 | */ | |
931 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
932 | const struct fb_fillrect *rect) | |
933 | { | |
934 | cfb_fillrect(info, rect); | |
935 | } | |
936 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
937 | ||
938 | /** | |
939 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
940 | * @info: fbdev registered by the helper | |
941 | * @area: info about area to copy | |
942 | * | |
943 | * A wrapper around cfb_copyarea implemented by fbdev core | |
944 | */ | |
945 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
946 | const struct fb_copyarea *area) | |
947 | { | |
948 | cfb_copyarea(info, area); | |
949 | } | |
950 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
951 | ||
952 | /** | |
953 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
954 | * @info: fbdev registered by the helper | |
955 | * @image: info about image to blit | |
956 | * | |
957 | * A wrapper around cfb_imageblit implemented by fbdev core | |
958 | */ | |
959 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
960 | const struct fb_image *image) | |
961 | { | |
962 | cfb_imageblit(info, image); | |
963 | } | |
964 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
965 | ||
fdefa58a AT |
966 | /** |
967 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
968 | * @fb_helper: driver-allocated fbdev helper | |
969 | * @state: desired state, zero to resume, non-zero to suspend | |
970 | * | |
971 | * A wrapper around fb_set_suspend implemented by fbdev core | |
972 | */ | |
973 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, int state) | |
974 | { | |
975 | if (fb_helper && fb_helper->fbdev) | |
976 | fb_set_suspend(fb_helper->fbdev, state); | |
977 | } | |
978 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
979 | ||
c850cb78 | 980 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
981 | u16 blue, u16 regno, struct fb_info *info) |
982 | { | |
983 | struct drm_fb_helper *fb_helper = info->par; | |
984 | struct drm_framebuffer *fb = fb_helper->fb; | |
985 | int pindex; | |
986 | ||
c850cb78 DA |
987 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
988 | u32 *palette; | |
989 | u32 value; | |
990 | /* place color in psuedopalette */ | |
991 | if (regno > 16) | |
992 | return -EINVAL; | |
993 | palette = (u32 *)info->pseudo_palette; | |
994 | red >>= (16 - info->var.red.length); | |
995 | green >>= (16 - info->var.green.length); | |
996 | blue >>= (16 - info->var.blue.length); | |
997 | value = (red << info->var.red.offset) | | |
998 | (green << info->var.green.offset) | | |
999 | (blue << info->var.blue.offset); | |
9da12b6a RC |
1000 | if (info->var.transp.length > 0) { |
1001 | u32 mask = (1 << info->var.transp.length) - 1; | |
1002 | mask <<= info->var.transp.offset; | |
1003 | value |= mask; | |
1004 | } | |
c850cb78 DA |
1005 | palette[regno] = value; |
1006 | return 0; | |
1007 | } | |
1008 | ||
04c0c569 VS |
1009 | /* |
1010 | * The driver really shouldn't advertise pseudo/directcolor | |
1011 | * visuals if it can't deal with the palette. | |
1012 | */ | |
1013 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1014 | !fb_helper->funcs->gamma_get)) | |
1015 | return -EINVAL; | |
1016 | ||
b8c00ac5 DA |
1017 | pindex = regno; |
1018 | ||
1019 | if (fb->bits_per_pixel == 16) { | |
1020 | pindex = regno << 3; | |
1021 | ||
1022 | if (fb->depth == 16 && regno > 63) | |
c850cb78 | 1023 | return -EINVAL; |
b8c00ac5 | 1024 | if (fb->depth == 15 && regno > 31) |
c850cb78 | 1025 | return -EINVAL; |
b8c00ac5 DA |
1026 | |
1027 | if (fb->depth == 16) { | |
1028 | u16 r, g, b; | |
1029 | int i; | |
1030 | if (regno < 32) { | |
1031 | for (i = 0; i < 8; i++) | |
1032 | fb_helper->funcs->gamma_set(crtc, red, | |
1033 | green, blue, pindex + i); | |
1034 | } | |
1035 | ||
1036 | fb_helper->funcs->gamma_get(crtc, &r, | |
1037 | &g, &b, | |
1038 | pindex >> 1); | |
1039 | ||
1040 | for (i = 0; i < 4; i++) | |
1041 | fb_helper->funcs->gamma_set(crtc, r, | |
1042 | green, b, | |
1043 | (pindex >> 1) + i); | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | if (fb->depth != 16) | |
1048 | fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); | |
c850cb78 | 1049 | return 0; |
b8c00ac5 DA |
1050 | } |
1051 | ||
207fd329 DV |
1052 | /** |
1053 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
1054 | * @cmap: cmap to set | |
1055 | * @info: fbdev registered by the helper | |
1056 | */ | |
068143d3 DA |
1057 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1058 | { | |
1059 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1060 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1061 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1062 | u16 *red, *green, *blue, *transp; |
1063 | struct drm_crtc *crtc; | |
062ac622 | 1064 | int i, j, rc = 0; |
068143d3 DA |
1065 | int start; |
1066 | ||
c50bfd08 | 1067 | if (oops_in_progress) |
9aa609e1 | 1068 | return -EBUSY; |
c50bfd08 DV |
1069 | |
1070 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1071 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1072 | drm_modeset_unlock_all(dev); | |
1073 | return -EBUSY; | |
1074 | } | |
1075 | ||
8be48d92 DA |
1076 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1077 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1078 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1079 | |
1080 | red = cmap->red; | |
1081 | green = cmap->green; | |
1082 | blue = cmap->blue; | |
1083 | transp = cmap->transp; | |
1084 | start = cmap->start; | |
1085 | ||
062ac622 | 1086 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1087 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1088 | ||
1089 | hred = *red++; | |
1090 | hgreen = *green++; | |
1091 | hblue = *blue++; | |
1092 | ||
1093 | if (transp) | |
1094 | htransp = *transp++; | |
1095 | ||
c850cb78 DA |
1096 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1097 | if (rc) | |
8391a3d5 | 1098 | goto out; |
068143d3 | 1099 | } |
04c0c569 VS |
1100 | if (crtc_funcs->load_lut) |
1101 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1102 | } |
8391a3d5 VS |
1103 | out: |
1104 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1105 | return rc; |
1106 | } | |
1107 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1108 | ||
207fd329 DV |
1109 | /** |
1110 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
1111 | * @var: screeninfo to check | |
1112 | * @info: fbdev registered by the helper | |
1113 | */ | |
785b93ef DA |
1114 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1115 | struct fb_info *info) | |
1116 | { | |
1117 | struct drm_fb_helper *fb_helper = info->par; | |
1118 | struct drm_framebuffer *fb = fb_helper->fb; | |
1119 | int depth; | |
1120 | ||
f90ebd9e | 1121 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1122 | return -EINVAL; |
1123 | ||
1124 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
1125 | if (var->bits_per_pixel > fb->bits_per_pixel || |
1126 | var->xres > fb->width || var->yres > fb->height || | |
1127 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 1128 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
1129 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1130 | var->xres, var->yres, var->bits_per_pixel, | |
1131 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 1132 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
1133 | return -EINVAL; |
1134 | } | |
1135 | ||
1136 | switch (var->bits_per_pixel) { | |
1137 | case 16: | |
1138 | depth = (var->green.length == 6) ? 16 : 15; | |
1139 | break; | |
1140 | case 32: | |
1141 | depth = (var->transp.length > 0) ? 32 : 24; | |
1142 | break; | |
1143 | default: | |
1144 | depth = var->bits_per_pixel; | |
1145 | break; | |
1146 | } | |
1147 | ||
1148 | switch (depth) { | |
1149 | case 8: | |
1150 | var->red.offset = 0; | |
1151 | var->green.offset = 0; | |
1152 | var->blue.offset = 0; | |
1153 | var->red.length = 8; | |
1154 | var->green.length = 8; | |
1155 | var->blue.length = 8; | |
1156 | var->transp.length = 0; | |
1157 | var->transp.offset = 0; | |
1158 | break; | |
1159 | case 15: | |
1160 | var->red.offset = 10; | |
1161 | var->green.offset = 5; | |
1162 | var->blue.offset = 0; | |
1163 | var->red.length = 5; | |
1164 | var->green.length = 5; | |
1165 | var->blue.length = 5; | |
1166 | var->transp.length = 1; | |
1167 | var->transp.offset = 15; | |
1168 | break; | |
1169 | case 16: | |
1170 | var->red.offset = 11; | |
1171 | var->green.offset = 5; | |
1172 | var->blue.offset = 0; | |
1173 | var->red.length = 5; | |
1174 | var->green.length = 6; | |
1175 | var->blue.length = 5; | |
1176 | var->transp.length = 0; | |
1177 | var->transp.offset = 0; | |
1178 | break; | |
1179 | case 24: | |
1180 | var->red.offset = 16; | |
1181 | var->green.offset = 8; | |
1182 | var->blue.offset = 0; | |
1183 | var->red.length = 8; | |
1184 | var->green.length = 8; | |
1185 | var->blue.length = 8; | |
1186 | var->transp.length = 0; | |
1187 | var->transp.offset = 0; | |
1188 | break; | |
1189 | case 32: | |
1190 | var->red.offset = 16; | |
1191 | var->green.offset = 8; | |
1192 | var->blue.offset = 0; | |
1193 | var->red.length = 8; | |
1194 | var->green.length = 8; | |
1195 | var->blue.length = 8; | |
1196 | var->transp.length = 8; | |
1197 | var->transp.offset = 24; | |
1198 | break; | |
1199 | default: | |
1200 | return -EINVAL; | |
1201 | } | |
1202 | return 0; | |
1203 | } | |
1204 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1205 | ||
207fd329 DV |
1206 | /** |
1207 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
1208 | * @info: fbdev registered by the helper | |
1209 | * | |
1210 | * This will let fbcon do the mode init and is called at initialization time by | |
1211 | * the fbdev core when registering the driver, and later on through the hotplug | |
1212 | * callback. | |
1213 | */ | |
785b93ef DA |
1214 | int drm_fb_helper_set_par(struct fb_info *info) |
1215 | { | |
1216 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1217 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1218 | |
c50bfd08 DV |
1219 | if (oops_in_progress) |
1220 | return -EBUSY; | |
1221 | ||
5349ef31 | 1222 | if (var->pixclock != 0) { |
172e91f5 | 1223 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1224 | return -EINVAL; |
1225 | } | |
1226 | ||
5ea1f752 | 1227 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1228 | |
785b93ef DA |
1229 | return 0; |
1230 | } | |
1231 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1232 | ||
1edf0269 | 1233 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1234 | struct fb_info *info) |
1edf0269 RC |
1235 | { |
1236 | struct drm_fb_helper *fb_helper = info->par; | |
1237 | struct drm_device *dev = fb_helper->dev; | |
1238 | struct drm_atomic_state *state; | |
1239 | int i, ret; | |
1240 | ||
1241 | state = drm_atomic_state_alloc(dev); | |
1242 | if (!state) | |
1243 | return -ENOMEM; | |
1244 | ||
1245 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1246 | retry: | |
1247 | for(i = 0; i < fb_helper->crtc_count; i++) { | |
1248 | struct drm_mode_set *mode_set; | |
1249 | ||
1250 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1251 | ||
a0fb6ad7 DV |
1252 | mode_set->crtc->primary->old_fb = mode_set->crtc->primary->fb; |
1253 | ||
1edf0269 RC |
1254 | mode_set->x = var->xoffset; |
1255 | mode_set->y = var->yoffset; | |
1256 | ||
1257 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1258 | if (ret != 0) | |
1259 | goto fail; | |
1260 | } | |
1261 | ||
1262 | ret = drm_atomic_commit(state); | |
1263 | if (ret != 0) | |
1264 | goto fail; | |
1265 | ||
1266 | info->var.xoffset = var->xoffset; | |
1267 | info->var.yoffset = var->yoffset; | |
1268 | ||
1edf0269 RC |
1269 | |
1270 | fail: | |
a0fb6ad7 DV |
1271 | for(i = 0; i < fb_helper->crtc_count; i++) { |
1272 | struct drm_mode_set *mode_set; | |
1273 | struct drm_plane *plane; | |
1274 | ||
1275 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1276 | plane = mode_set->crtc->primary; | |
1277 | ||
1278 | if (ret == 0) { | |
1279 | struct drm_framebuffer *new_fb = plane->state->fb; | |
1280 | ||
1281 | if (new_fb) | |
1282 | drm_framebuffer_reference(new_fb); | |
1283 | plane->fb = new_fb; | |
1284 | plane->crtc = plane->state->crtc; | |
1285 | ||
1286 | if (plane->old_fb) | |
1287 | drm_framebuffer_unreference(plane->old_fb); | |
1288 | } | |
1289 | plane->old_fb = NULL; | |
1290 | } | |
1291 | ||
1edf0269 RC |
1292 | if (ret == -EDEADLK) |
1293 | goto backoff; | |
1294 | ||
a0fb6ad7 DV |
1295 | if (ret != 0) |
1296 | drm_atomic_state_free(state); | |
1edf0269 RC |
1297 | |
1298 | return ret; | |
1299 | ||
1300 | backoff: | |
1301 | drm_atomic_state_clear(state); | |
1302 | drm_atomic_legacy_backoff(state); | |
1303 | ||
1304 | goto retry; | |
1305 | } | |
1306 | ||
207fd329 DV |
1307 | /** |
1308 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
1309 | * @var: updated screen information | |
1310 | * @info: fbdev registered by the helper | |
1311 | */ | |
785b93ef DA |
1312 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1313 | struct fb_info *info) | |
1314 | { | |
1315 | struct drm_fb_helper *fb_helper = info->par; | |
1316 | struct drm_device *dev = fb_helper->dev; | |
1317 | struct drm_mode_set *modeset; | |
785b93ef DA |
1318 | int ret = 0; |
1319 | int i; | |
1320 | ||
c50bfd08 | 1321 | if (oops_in_progress) |
9aa609e1 | 1322 | return -EBUSY; |
c50bfd08 DV |
1323 | |
1324 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1325 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1326 | drm_modeset_unlock_all(dev); | |
1327 | return -EBUSY; | |
1328 | } | |
1329 | ||
1edf0269 RC |
1330 | if (fb_helper->atomic) { |
1331 | ret = pan_display_atomic(var, info); | |
1332 | goto unlock; | |
1333 | } | |
1334 | ||
8be48d92 | 1335 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1336 | modeset = &fb_helper->crtc_info[i].mode_set; |
1337 | ||
1338 | modeset->x = var->xoffset; | |
1339 | modeset->y = var->yoffset; | |
1340 | ||
1341 | if (modeset->num_connectors) { | |
2d13b679 | 1342 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1343 | if (!ret) { |
1344 | info->var.xoffset = var->xoffset; | |
1345 | info->var.yoffset = var->yoffset; | |
1346 | } | |
1347 | } | |
1348 | } | |
1edf0269 | 1349 | unlock: |
84849903 | 1350 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1351 | return ret; |
1352 | } | |
1353 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1354 | ||
8acf658a | 1355 | /* |
207fd329 DV |
1356 | * Allocates the backing storage and sets up the fbdev info structure through |
1357 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1358 | * notifier. | |
8acf658a | 1359 | */ |
de1ace5b DV |
1360 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1361 | int preferred_bpp) | |
785b93ef | 1362 | { |
8acf658a | 1363 | int ret = 0; |
785b93ef | 1364 | int crtc_count = 0; |
4abe3520 | 1365 | int i; |
785b93ef | 1366 | struct fb_info *info; |
38651674 | 1367 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1368 | int gamma_size = 0; |
38651674 DA |
1369 | |
1370 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1371 | sizes.surface_depth = 24; | |
1372 | sizes.surface_bpp = 32; | |
1373 | sizes.fb_width = (unsigned)-1; | |
1374 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 1375 | |
b8c00ac5 DA |
1376 | /* if driver picks 8 or 16 by default use that |
1377 | for both depth/bpp */ | |
96081cdf | 1378 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1379 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1380 | |
785b93ef | 1381 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
1382 | for (i = 0; i < fb_helper->connector_count; i++) { |
1383 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 1384 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1385 | |
eaf99c74 | 1386 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1387 | |
1388 | if (cmdline_mode->bpp_specified) { | |
1389 | switch (cmdline_mode->bpp) { | |
1390 | case 8: | |
38651674 | 1391 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1392 | break; |
1393 | case 15: | |
38651674 DA |
1394 | sizes.surface_depth = 15; |
1395 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1396 | break; |
1397 | case 16: | |
38651674 | 1398 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1399 | break; |
1400 | case 24: | |
38651674 | 1401 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1402 | break; |
1403 | case 32: | |
38651674 DA |
1404 | sizes.surface_depth = 24; |
1405 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1406 | break; |
1407 | } | |
1408 | break; | |
1409 | } | |
1410 | } | |
1411 | ||
8be48d92 DA |
1412 | crtc_count = 0; |
1413 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1414 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1415 | struct drm_mode_set *mode_set; |
1416 | int x, y, j; | |
1417 | /* in case of tile group, are we the last tile vert or horiz? | |
1418 | * If no tile group you are always the last one both vertically | |
1419 | * and horizontally | |
1420 | */ | |
1421 | bool lastv = true, lasth = true; | |
675c8328 | 1422 | |
8be48d92 | 1423 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1424 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1425 | |
1426 | if (!desired_mode) | |
1427 | continue; | |
1428 | ||
1429 | crtc_count++; | |
1430 | ||
b0ee9e7f DA |
1431 | x = fb_helper->crtc_info[i].x; |
1432 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1433 | |
1434 | if (gamma_size == 0) | |
1435 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1436 | ||
1437 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1438 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1439 | |
1440 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1441 | struct drm_connector *connector = mode_set->connectors[j]; | |
1442 | if (connector->has_tile) { | |
1443 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1444 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1445 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1446 | break; | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | if (lasth) | |
1451 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1452 | if (lastv) | |
1453 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1454 | } |
1455 | ||
38651674 | 1456 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1457 | /* hmm everyone went away - assume VGA cable just fell out |
1458 | and will come back later. */ | |
eb1f8e4f | 1459 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1460 | sizes.fb_width = sizes.surface_width = 1024; |
1461 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1462 | } |
1463 | ||
38651674 | 1464 | /* push down into drivers */ |
8acf658a DV |
1465 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1466 | if (ret < 0) | |
1467 | return ret; | |
785b93ef | 1468 | |
38651674 | 1469 | info = fb_helper->fbdev; |
785b93ef | 1470 | |
7e53f3a4 DV |
1471 | /* |
1472 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1473 | * events, but at init time drm_setup_crtcs needs to be called before | |
1474 | * the fb is allocated (since we need to figure out the desired size of | |
1475 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1476 | * here again. | |
1477 | */ | |
96081cdf | 1478 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1479 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1480 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1481 | ||
785b93ef | 1482 | |
8acf658a DV |
1483 | info->var.pixclock = 0; |
1484 | if (register_framebuffer(info) < 0) | |
1485 | return -EINVAL; | |
38651674 | 1486 | |
8acf658a DV |
1487 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1488 | info->node, info->fix.id); | |
785b93ef | 1489 | |
785b93ef | 1490 | if (list_empty(&kernel_fb_helper_list)) { |
785b93ef DA |
1491 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
1492 | } | |
8acf658a DV |
1493 | |
1494 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1495 | |
785b93ef DA |
1496 | return 0; |
1497 | } | |
785b93ef | 1498 | |
207fd329 DV |
1499 | /** |
1500 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1501 | * @info: fbdev registered by the helper | |
1502 | * @pitch: desired pitch | |
1503 | * @depth: desired depth | |
1504 | * | |
1505 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1506 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1507 | * additional constraints need to set up their own limits. | |
1508 | * | |
1509 | * Drivers should call this (or their equivalent setup code) from their | |
1510 | * ->fb_probe callback. | |
1511 | */ | |
3632ef89 DA |
1512 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1513 | uint32_t depth) | |
1514 | { | |
1515 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1516 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1517 | FB_VISUAL_TRUECOLOR; | |
1518 | info->fix.mmio_start = 0; | |
1519 | info->fix.mmio_len = 0; | |
1520 | info->fix.type_aux = 0; | |
1521 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1522 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1523 | info->fix.ywrapstep = 0; | |
1524 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1525 | |
1526 | info->fix.line_length = pitch; | |
1527 | return; | |
1528 | } | |
1529 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1530 | ||
207fd329 DV |
1531 | /** |
1532 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1533 | * @info: fbdev instance to set up | |
1534 | * @fb_helper: fb helper instance to use as template | |
1535 | * @fb_width: desired fb width | |
1536 | * @fb_height: desired fb height | |
1537 | * | |
1538 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1539 | * and the drm framebuffer allocated in fb_helper->fb. | |
1540 | * | |
1541 | * Drivers should call this (or their equivalent setup code) from their | |
1542 | * ->fb_probe callback after having allocated the fbdev backing | |
1543 | * storage framebuffer. | |
1544 | */ | |
38651674 | 1545 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1546 | uint32_t fb_width, uint32_t fb_height) |
1547 | { | |
38651674 DA |
1548 | struct drm_framebuffer *fb = fb_helper->fb; |
1549 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1550 | info->var.xres_virtual = fb->width; |
1551 | info->var.yres_virtual = fb->height; | |
1552 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1553 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1554 | info->var.xoffset = 0; |
1555 | info->var.yoffset = 0; | |
1556 | info->var.activate = FB_ACTIVATE_NOW; | |
1557 | info->var.height = -1; | |
1558 | info->var.width = -1; | |
1559 | ||
1560 | switch (fb->depth) { | |
1561 | case 8: | |
1562 | info->var.red.offset = 0; | |
1563 | info->var.green.offset = 0; | |
1564 | info->var.blue.offset = 0; | |
1565 | info->var.red.length = 8; /* 8bit DAC */ | |
1566 | info->var.green.length = 8; | |
1567 | info->var.blue.length = 8; | |
1568 | info->var.transp.offset = 0; | |
1569 | info->var.transp.length = 0; | |
1570 | break; | |
1571 | case 15: | |
1572 | info->var.red.offset = 10; | |
1573 | info->var.green.offset = 5; | |
1574 | info->var.blue.offset = 0; | |
1575 | info->var.red.length = 5; | |
1576 | info->var.green.length = 5; | |
1577 | info->var.blue.length = 5; | |
1578 | info->var.transp.offset = 15; | |
1579 | info->var.transp.length = 1; | |
1580 | break; | |
1581 | case 16: | |
1582 | info->var.red.offset = 11; | |
1583 | info->var.green.offset = 5; | |
1584 | info->var.blue.offset = 0; | |
1585 | info->var.red.length = 5; | |
1586 | info->var.green.length = 6; | |
1587 | info->var.blue.length = 5; | |
1588 | info->var.transp.offset = 0; | |
1589 | break; | |
1590 | case 24: | |
1591 | info->var.red.offset = 16; | |
1592 | info->var.green.offset = 8; | |
1593 | info->var.blue.offset = 0; | |
1594 | info->var.red.length = 8; | |
1595 | info->var.green.length = 8; | |
1596 | info->var.blue.length = 8; | |
1597 | info->var.transp.offset = 0; | |
1598 | info->var.transp.length = 0; | |
1599 | break; | |
1600 | case 32: | |
1601 | info->var.red.offset = 16; | |
1602 | info->var.green.offset = 8; | |
1603 | info->var.blue.offset = 0; | |
1604 | info->var.red.length = 8; | |
1605 | info->var.green.length = 8; | |
1606 | info->var.blue.length = 8; | |
1607 | info->var.transp.offset = 24; | |
1608 | info->var.transp.length = 8; | |
1609 | break; | |
1610 | default: | |
1611 | break; | |
1612 | } | |
1613 | ||
1614 | info->var.xres = fb_width; | |
1615 | info->var.yres = fb_height; | |
1616 | } | |
1617 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1618 | |
0b4c0f3f DA |
1619 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1620 | uint32_t maxX, | |
1621 | uint32_t maxY) | |
38651674 DA |
1622 | { |
1623 | struct drm_connector *connector; | |
1624 | int count = 0; | |
0b4c0f3f | 1625 | int i; |
38651674 | 1626 | |
0b4c0f3f DA |
1627 | for (i = 0; i < fb_helper->connector_count; i++) { |
1628 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1629 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1630 | } | |
1631 | ||
1632 | return count; | |
1633 | } | |
1634 | ||
2f1046f3 | 1635 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1636 | { |
1637 | struct drm_display_mode *mode; | |
1638 | ||
0b4c0f3f | 1639 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1640 | if (mode->hdisplay > width || |
1641 | mode->vdisplay > height) | |
38651674 DA |
1642 | continue; |
1643 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1644 | return mode; | |
1645 | } | |
1646 | return NULL; | |
1647 | } | |
2f1046f3 | 1648 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1649 | |
0b4c0f3f | 1650 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1651 | { |
eaf99c74 | 1652 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1653 | } |
1654 | ||
2f1046f3 | 1655 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1656 | int width, int height) |
38651674 | 1657 | { |
1794d257 | 1658 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1659 | struct drm_display_mode *mode; |
c683f427 | 1660 | bool prefer_non_interlace; |
38651674 | 1661 | |
eaf99c74 | 1662 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1663 | if (cmdline_mode->specified == false) |
f3af5c7d | 1664 | return NULL; |
38651674 DA |
1665 | |
1666 | /* attempt to find a matching mode in the list of modes | |
1667 | * we have gotten so far, if not add a CVT mode that conforms | |
1668 | */ | |
1669 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1670 | goto create_mode; | |
1671 | ||
c683f427 | 1672 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1673 | again: |
0b4c0f3f | 1674 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1675 | /* check width/height */ |
1676 | if (mode->hdisplay != cmdline_mode->xres || | |
1677 | mode->vdisplay != cmdline_mode->yres) | |
1678 | continue; | |
1679 | ||
1680 | if (cmdline_mode->refresh_specified) { | |
1681 | if (mode->vrefresh != cmdline_mode->refresh) | |
1682 | continue; | |
1683 | } | |
1684 | ||
1685 | if (cmdline_mode->interlace) { | |
1686 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1687 | continue; | |
c683f427 TI |
1688 | } else if (prefer_non_interlace) { |
1689 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1690 | continue; | |
38651674 DA |
1691 | } |
1692 | return mode; | |
1693 | } | |
1694 | ||
c683f427 TI |
1695 | if (prefer_non_interlace) { |
1696 | prefer_non_interlace = false; | |
1697 | goto again; | |
1698 | } | |
1699 | ||
38651674 | 1700 | create_mode: |
1794d257 CW |
1701 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1702 | cmdline_mode); | |
0b4c0f3f | 1703 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1704 | return mode; |
1705 | } | |
2f1046f3 | 1706 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1707 | |
1708 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1709 | { | |
1710 | bool enable; | |
1711 | ||
96081cdf | 1712 | if (strict) |
38651674 | 1713 | enable = connector->status == connector_status_connected; |
96081cdf | 1714 | else |
38651674 | 1715 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1716 | |
38651674 DA |
1717 | return enable; |
1718 | } | |
1719 | ||
0b4c0f3f DA |
1720 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1721 | bool *enabled) | |
38651674 DA |
1722 | { |
1723 | bool any_enabled = false; | |
1724 | struct drm_connector *connector; | |
1725 | int i = 0; | |
1726 | ||
0b4c0f3f DA |
1727 | for (i = 0; i < fb_helper->connector_count; i++) { |
1728 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1729 | enabled[i] = drm_connector_enabled(connector, true); |
1730 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1731 | enabled[i] ? "yes" : "no"); | |
1732 | any_enabled |= enabled[i]; | |
38651674 DA |
1733 | } |
1734 | ||
1735 | if (any_enabled) | |
1736 | return; | |
1737 | ||
0b4c0f3f DA |
1738 | for (i = 0; i < fb_helper->connector_count; i++) { |
1739 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1740 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1741 | } |
1742 | } | |
1743 | ||
1d42bbc8 DA |
1744 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1745 | struct drm_display_mode **modes, | |
b0ee9e7f | 1746 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1747 | bool *enabled, int width, int height) |
1748 | { | |
1749 | int count, i, j; | |
1750 | bool can_clone = false; | |
1751 | struct drm_fb_helper_connector *fb_helper_conn; | |
1752 | struct drm_display_mode *dmt_mode, *mode; | |
1753 | ||
1754 | /* only contemplate cloning in the single crtc case */ | |
1755 | if (fb_helper->crtc_count > 1) | |
1756 | return false; | |
1757 | ||
1758 | count = 0; | |
1759 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1760 | if (enabled[i]) | |
1761 | count++; | |
1762 | } | |
1763 | ||
1764 | /* only contemplate cloning if more than one connector is enabled */ | |
1765 | if (count <= 1) | |
1766 | return false; | |
1767 | ||
1768 | /* check the command line or if nothing common pick 1024x768 */ | |
1769 | can_clone = true; | |
1770 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1771 | if (!enabled[i]) | |
1772 | continue; | |
1773 | fb_helper_conn = fb_helper->connector_info[i]; | |
1774 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1775 | if (!modes[i]) { | |
1776 | can_clone = false; | |
1777 | break; | |
1778 | } | |
1779 | for (j = 0; j < i; j++) { | |
1780 | if (!enabled[j]) | |
1781 | continue; | |
1782 | if (!drm_mode_equal(modes[j], modes[i])) | |
1783 | can_clone = false; | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | if (can_clone) { | |
1788 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1789 | return true; | |
1790 | } | |
1791 | ||
1792 | /* try and find a 1024x768 mode on each connector */ | |
1793 | can_clone = true; | |
f6e252ba | 1794 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1795 | |
1796 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1797 | ||
1798 | if (!enabled[i]) | |
1799 | continue; | |
1800 | ||
1801 | fb_helper_conn = fb_helper->connector_info[i]; | |
1802 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1803 | if (drm_mode_equal(mode, dmt_mode)) | |
1804 | modes[i] = mode; | |
1805 | } | |
1806 | if (!modes[i]) | |
1807 | can_clone = false; | |
1808 | } | |
1809 | ||
1810 | if (can_clone) { | |
1811 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1812 | return true; | |
1813 | } | |
1814 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1815 | return false; | |
1816 | } | |
1817 | ||
b0ee9e7f DA |
1818 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1819 | struct drm_display_mode **modes, | |
1820 | struct drm_fb_offset *offsets, | |
1821 | int idx, | |
1822 | int h_idx, int v_idx) | |
1823 | { | |
1824 | struct drm_fb_helper_connector *fb_helper_conn; | |
1825 | int i; | |
1826 | int hoffset = 0, voffset = 0; | |
1827 | ||
1828 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1829 | fb_helper_conn = fb_helper->connector_info[i]; | |
1830 | if (!fb_helper_conn->connector->has_tile) | |
1831 | continue; | |
1832 | ||
1833 | if (!modes[i] && (h_idx || v_idx)) { | |
1834 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
1835 | fb_helper_conn->connector->base.id); | |
1836 | continue; | |
1837 | } | |
1838 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
1839 | hoffset += modes[i]->hdisplay; | |
1840 | ||
1841 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
1842 | voffset += modes[i]->vdisplay; | |
1843 | } | |
1844 | offsets[idx].x = hoffset; | |
1845 | offsets[idx].y = voffset; | |
1846 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
1847 | return 0; | |
1848 | } | |
1849 | ||
0b4c0f3f | 1850 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 1851 | struct drm_display_mode **modes, |
b0ee9e7f | 1852 | struct drm_fb_offset *offsets, |
38651674 DA |
1853 | bool *enabled, int width, int height) |
1854 | { | |
0b4c0f3f DA |
1855 | struct drm_fb_helper_connector *fb_helper_conn; |
1856 | int i; | |
b0ee9e7f DA |
1857 | uint64_t conn_configured = 0, mask; |
1858 | int tile_pass = 0; | |
1859 | mask = (1 << fb_helper->connector_count) - 1; | |
1860 | retry: | |
0b4c0f3f DA |
1861 | for (i = 0; i < fb_helper->connector_count; i++) { |
1862 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1863 | |
b0ee9e7f DA |
1864 | if (conn_configured & (1 << i)) |
1865 | continue; | |
1866 | ||
1867 | if (enabled[i] == false) { | |
1868 | conn_configured |= (1 << i); | |
1869 | continue; | |
1870 | } | |
1871 | ||
1872 | /* first pass over all the untiled connectors */ | |
1873 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 1874 | continue; |
38651674 | 1875 | |
b0ee9e7f DA |
1876 | if (tile_pass == 1) { |
1877 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
1878 | fb_helper_conn->connector->tile_v_loc != 0) | |
1879 | continue; | |
1880 | ||
1881 | } else { | |
1882 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && | |
1883 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) | |
1884 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
1885 | continue; | |
1886 | ||
1887 | /* find the tile offsets for this pass - need | |
1888 | to find all tiles left and above */ | |
1889 | drm_get_tile_offsets(fb_helper, modes, offsets, | |
1890 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
1891 | } | |
38651674 | 1892 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 1893 | fb_helper_conn->connector->base.id); |
38651674 DA |
1894 | |
1895 | /* got for command line mode first */ | |
0b4c0f3f | 1896 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 | 1897 | if (!modes[i]) { |
b0ee9e7f DA |
1898 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
1899 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 1900 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
1901 | } |
1902 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1903 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1904 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1905 | break; |
1906 | } | |
1907 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1908 | "none"); | |
b0ee9e7f DA |
1909 | conn_configured |= (1 << i); |
1910 | } | |
1911 | ||
1912 | if ((conn_configured & mask) != mask) { | |
1913 | tile_pass++; | |
1914 | goto retry; | |
38651674 DA |
1915 | } |
1916 | return true; | |
1917 | } | |
1918 | ||
8be48d92 DA |
1919 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1920 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1921 | struct drm_display_mode **modes, |
1922 | int n, int width, int height) | |
1923 | { | |
1924 | int c, o; | |
8be48d92 | 1925 | struct drm_device *dev = fb_helper->dev; |
38651674 | 1926 | struct drm_connector *connector; |
be26a66d | 1927 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 1928 | struct drm_encoder *encoder; |
38651674 | 1929 | int my_score, best_score, score; |
8be48d92 | 1930 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 1931 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 1932 | |
0b4c0f3f | 1933 | if (n == fb_helper->connector_count) |
38651674 | 1934 | return 0; |
0b4c0f3f DA |
1935 | |
1936 | fb_helper_conn = fb_helper->connector_info[n]; | |
1937 | connector = fb_helper_conn->connector; | |
38651674 DA |
1938 | |
1939 | best_crtcs[n] = NULL; | |
8be48d92 | 1940 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
1941 | if (modes[n] == NULL) |
1942 | return best_score; | |
1943 | ||
8be48d92 DA |
1944 | crtcs = kzalloc(dev->mode_config.num_connector * |
1945 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); | |
38651674 DA |
1946 | if (!crtcs) |
1947 | return best_score; | |
1948 | ||
1949 | my_score = 1; | |
1950 | if (connector->status == connector_status_connected) | |
1951 | my_score++; | |
0b4c0f3f | 1952 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 1953 | my_score++; |
0b4c0f3f | 1954 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
1955 | my_score++; |
1956 | ||
1957 | connector_funcs = connector->helper_private; | |
1958 | encoder = connector_funcs->best_encoder(connector); | |
1959 | if (!encoder) | |
1960 | goto out; | |
1961 | ||
38651674 DA |
1962 | /* select a crtc for this connector and then attempt to configure |
1963 | remaining connectors */ | |
8be48d92 DA |
1964 | for (c = 0; c < fb_helper->crtc_count; c++) { |
1965 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 1966 | |
96081cdf | 1967 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 1968 | continue; |
38651674 DA |
1969 | |
1970 | for (o = 0; o < n; o++) | |
1971 | if (best_crtcs[o] == crtc) | |
1972 | break; | |
1973 | ||
1974 | if (o < n) { | |
1d42bbc8 DA |
1975 | /* ignore cloning unless only a single crtc */ |
1976 | if (fb_helper->crtc_count > 1) | |
1977 | continue; | |
1978 | ||
1979 | if (!drm_mode_equal(modes[o], modes[n])) | |
1980 | continue; | |
38651674 DA |
1981 | } |
1982 | ||
1983 | crtcs[n] = crtc; | |
8be48d92 DA |
1984 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
1985 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
1986 | width, height); |
1987 | if (score > best_score) { | |
38651674 DA |
1988 | best_score = score; |
1989 | memcpy(best_crtcs, crtcs, | |
1990 | dev->mode_config.num_connector * | |
8be48d92 | 1991 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 1992 | } |
38651674 DA |
1993 | } |
1994 | out: | |
1995 | kfree(crtcs); | |
1996 | return best_score; | |
1997 | } | |
1998 | ||
8be48d92 | 1999 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 2000 | { |
8be48d92 DA |
2001 | struct drm_device *dev = fb_helper->dev; |
2002 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 2003 | struct drm_display_mode **modes; |
b0ee9e7f | 2004 | struct drm_fb_offset *offsets; |
8be48d92 | 2005 | struct drm_mode_set *modeset; |
38651674 DA |
2006 | bool *enabled; |
2007 | int width, height; | |
11e17a08 | 2008 | int i; |
38651674 DA |
2009 | |
2010 | DRM_DEBUG_KMS("\n"); | |
2011 | ||
2012 | width = dev->mode_config.max_width; | |
2013 | height = dev->mode_config.max_height; | |
2014 | ||
38651674 | 2015 | crtcs = kcalloc(dev->mode_config.num_connector, |
8be48d92 | 2016 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
2017 | modes = kcalloc(dev->mode_config.num_connector, |
2018 | sizeof(struct drm_display_mode *), GFP_KERNEL); | |
b0ee9e7f DA |
2019 | offsets = kcalloc(dev->mode_config.num_connector, |
2020 | sizeof(struct drm_fb_offset), GFP_KERNEL); | |
38651674 DA |
2021 | enabled = kcalloc(dev->mode_config.num_connector, |
2022 | sizeof(bool), GFP_KERNEL); | |
b0ee9e7f | 2023 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
2024 | DRM_ERROR("Memory allocation failed\n"); |
2025 | goto out; | |
2026 | } | |
2027 | ||
38651674 | 2028 | |
0b4c0f3f | 2029 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2030 | |
11e17a08 JB |
2031 | if (!(fb_helper->funcs->initial_config && |
2032 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2033 | offsets, |
11e17a08 JB |
2034 | enabled, width, height))) { |
2035 | memset(modes, 0, dev->mode_config.num_connector*sizeof(modes[0])); | |
2036 | memset(crtcs, 0, dev->mode_config.num_connector*sizeof(crtcs[0])); | |
b0ee9e7f | 2037 | memset(offsets, 0, dev->mode_config.num_connector*sizeof(offsets[0])); |
11e17a08 | 2038 | |
b0ee9e7f DA |
2039 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2040 | enabled, width, height) && | |
2041 | !drm_target_preferred(fb_helper, modes, offsets, | |
2042 | enabled, width, height)) | |
1d42bbc8 | 2043 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2044 | |
11e17a08 JB |
2045 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2046 | width, height); | |
38651674 | 2047 | |
11e17a08 JB |
2048 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2049 | } | |
8be48d92 DA |
2050 | |
2051 | /* need to set the modesets up here for use later */ | |
2052 | /* fill out the connector<->crtc mappings into the modesets */ | |
2053 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2054 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2055 | modeset->num_connectors = 0; | |
7e53f3a4 | 2056 | modeset->fb = NULL; |
8be48d92 | 2057 | } |
38651674 | 2058 | |
0b4c0f3f | 2059 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 2060 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2061 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2062 | struct drm_fb_offset *offset = &offsets[i]; |
8be48d92 | 2063 | modeset = &fb_crtc->mode_set; |
38651674 | 2064 | |
8be48d92 | 2065 | if (mode && fb_crtc) { |
b0ee9e7f DA |
2066 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2067 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
8be48d92 | 2068 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2069 | fb_crtc->x = offset->x; |
2070 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2071 | if (modeset->mode) |
2072 | drm_mode_destroy(dev, modeset->mode); | |
2073 | modeset->mode = drm_mode_duplicate(dev, | |
2074 | fb_crtc->desired_mode); | |
0b4c0f3f | 2075 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 2076 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2077 | modeset->x = offset->x; |
2078 | modeset->y = offset->y; | |
38651674 | 2079 | } |
38651674 DA |
2080 | } |
2081 | ||
7e53f3a4 DV |
2082 | /* Clear out any old modes if there are no more connected outputs. */ |
2083 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2084 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2085 | if (modeset->num_connectors == 0) { | |
2086 | BUG_ON(modeset->fb); | |
7e53f3a4 DV |
2087 | if (modeset->mode) |
2088 | drm_mode_destroy(dev, modeset->mode); | |
2089 | modeset->mode = NULL; | |
2090 | } | |
2091 | } | |
8c5eaca0 | 2092 | out: |
38651674 DA |
2093 | kfree(crtcs); |
2094 | kfree(modes); | |
b0ee9e7f | 2095 | kfree(offsets); |
38651674 DA |
2096 | kfree(enabled); |
2097 | } | |
2098 | ||
2099 | /** | |
207fd329 | 2100 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2101 | * @fb_helper: fb_helper device struct |
2102 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2103 | * |
d0ddc033 | 2104 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2105 | * At the moment, this is a cloned configuration across all heads with |
2106 | * a new framebuffer object as the backing store. | |
2107 | * | |
207fd329 DV |
2108 | * Note that this also registers the fbdev and so allows userspace to call into |
2109 | * the driver through the fbdev interfaces. | |
2110 | * | |
2111 | * This function will call down into the ->fb_probe callback to let | |
2112 | * the driver allocate and initialize the fbdev info structure and the drm | |
2113 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
2114 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
2115 | * values for the fbdev info structure. | |
2116 | * | |
38651674 DA |
2117 | * RETURNS: |
2118 | * Zero if everything went ok, nonzero otherwise. | |
2119 | */ | |
01934c2a | 2120 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2121 | { |
8be48d92 | 2122 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
2123 | int count = 0; |
2124 | ||
f64c5573 DV |
2125 | if (!drm_fbdev_emulation) |
2126 | return 0; | |
2127 | ||
53f1904b | 2128 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
2129 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
2130 | dev->mode_config.max_width, | |
2131 | dev->mode_config.max_height); | |
53f1904b | 2132 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
2133 | /* |
2134 | * we shouldn't end up with no modes here. | |
2135 | */ | |
96081cdf | 2136 | if (count == 0) |
d56b1b9d | 2137 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 2138 | |
8be48d92 | 2139 | drm_setup_crtcs(fb_helper); |
38651674 | 2140 | |
4abe3520 | 2141 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 2142 | } |
8be48d92 | 2143 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2144 | |
7394371d CW |
2145 | /** |
2146 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2147 | * probing all the outputs attached to the fb |
7394371d CW |
2148 | * @fb_helper: the drm_fb_helper |
2149 | * | |
7394371d CW |
2150 | * Scan the connectors attached to the fb_helper and try to put together a |
2151 | * setup after *notification of a change in output configuration. | |
2152 | * | |
207fd329 DV |
2153 | * Called at runtime, takes the mode config locks to be able to check/change the |
2154 | * modeset configuration. Must be run from process context (which usually means | |
2155 | * either the output polling work or a work item launched from the driver's | |
2156 | * hotplug interrupt). | |
2157 | * | |
50c3dc97 DV |
2158 | * Note that drivers may call this even before calling |
2159 | * drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows | |
2160 | * for a race-free fbcon setup and will make sure that the fbdev emulation will | |
2161 | * not miss any hotplug events. | |
207fd329 | 2162 | * |
7394371d CW |
2163 | * RETURNS: |
2164 | * 0 on success and a non-zero error code otherwise. | |
2165 | */ | |
2166 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2167 | { |
7394371d | 2168 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 2169 | u32 max_width, max_height; |
5c4426a7 | 2170 | |
f64c5573 DV |
2171 | if (!drm_fbdev_emulation) |
2172 | return 0; | |
2173 | ||
89ced125 | 2174 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
50c3dc97 | 2175 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2176 | fb_helper->delayed_hotplug = true; |
89ced125 | 2177 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 2178 | return 0; |
4abe3520 | 2179 | } |
eb1f8e4f | 2180 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2181 | |
eb1f8e4f DA |
2182 | max_width = fb_helper->fb->width; |
2183 | max_height = fb_helper->fb->height; | |
5c4426a7 | 2184 | |
51bbd276 | 2185 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
2186 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
2187 | ||
2188 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 2189 | drm_setup_crtcs(fb_helper); |
84849903 | 2190 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
2191 | drm_fb_helper_set_par(fb_helper->fbdev); |
2192 | ||
2193 | return 0; | |
5c4426a7 | 2194 | } |
eb1f8e4f | 2195 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2196 | |
6a108a14 | 2197 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2198 | * but the module doesn't depend on any fb console symbols. At least |
2199 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2200 | */ | |
6a108a14 | 2201 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2202 | static int __init drm_fb_helper_modinit(void) |
2203 | { | |
2204 | const char *name = "fbcon"; | |
2205 | struct module *fbcon; | |
2206 | ||
2207 | mutex_lock(&module_mutex); | |
2208 | fbcon = find_module(name); | |
2209 | mutex_unlock(&module_mutex); | |
2210 | ||
2211 | if (!fbcon) | |
2212 | request_module_nowait(name); | |
2213 | return 0; | |
2214 | } | |
2215 | ||
2216 | module_init(drm_fb_helper_modinit); | |
2217 | #endif |