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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 | ||
cfe63423 | 32 | #include <linux/console.h> |
3b40a443 | 33 | #include <linux/kernel.h> |
785b93ef | 34 | #include <linux/sysrq.h> |
5a0e3ad6 | 35 | #include <linux/slab.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 | |
699fbeea VS |
44 | #include "drm_crtc_helper_internal.h" |
45 | ||
f64c5573 DV |
46 | static bool drm_fbdev_emulation = true; |
47 | module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); | |
48 | MODULE_PARM_DESC(fbdev_emulation, | |
49 | "Enable legacy fbdev emulation [default=true]"); | |
50 | ||
785b93ef DA |
51 | static LIST_HEAD(kernel_fb_helper_list); |
52 | ||
d0ddc033 DV |
53 | /** |
54 | * DOC: fbdev helpers | |
55 | * | |
56 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
83c617c5 | 57 | * mode setting driver. They can be used mostly independently from the crtc |
d0ddc033 DV |
58 | * helper functions used by many drivers to implement the kernel mode setting |
59 | * interfaces. | |
207fd329 | 60 | * |
10a23102 TR |
61 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
62 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and | |
63 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the | |
64 | * default behaviour can override the third step with their own code. | |
65 | * Teardown is done with drm_fb_helper_fini(). | |
207fd329 DV |
66 | * |
67 | * At runtime drivers should restore the fbdev console by calling | |
3d9e35a9 GU |
68 | * drm_fb_helper_restore_fbdev_mode_unlocked() from their ->lastclose callback. |
69 | * They should also notify the fb helper code from updates to the output | |
207fd329 DV |
70 | * configuration by calling drm_fb_helper_hotplug_event(). For easier |
71 | * integration with the output polling code in drm_crtc_helper.c the modeset | |
83c617c5 | 72 | * code provides a ->output_poll_changed callback. |
207fd329 DV |
73 | * |
74 | * All other functions exported by the fb helper library can be used to | |
75 | * implement the fbdev driver interface by the driver. | |
10a23102 TR |
76 | * |
77 | * It is possible, though perhaps somewhat tricky, to implement race-free | |
78 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() | |
79 | * helper must be called first to initialize the minimum required to make | |
80 | * hotplug detection work. Drivers also need to make sure to properly set up | |
81 | * the dev->mode_config.funcs member. After calling drm_kms_helper_poll_init() | |
82 | * it is safe to enable interrupts and start processing hotplug events. At the | |
83 | * same time, drivers should initialize all modeset objects such as CRTCs, | |
84 | * encoders and connectors. To finish up the fbdev helper initialization, the | |
85 | * drm_fb_helper_init() function is called. To probe for all attached displays | |
86 | * and set up an initial configuration using the detected hardware, drivers | |
87 | * should call drm_fb_helper_single_add_all_connectors() followed by | |
88 | * drm_fb_helper_initial_config(). | |
eaa434de | 89 | * |
2dad551c NT |
90 | * If &drm_framebuffer_funcs ->dirty is set, the |
91 | * drm_fb_helper_{cfb,sys}_{write,fillrect,copyarea,imageblit} functions will | |
92 | * accumulate changes and schedule &drm_fb_helper ->dirty_work to run right | |
93 | * away. This worker then calls the dirty() function ensuring that it will | |
94 | * always run in process context since the fb_*() function could be running in | |
95 | * atomic context. If drm_fb_helper_deferred_io() is used as the deferred_io | |
96 | * callback it will also schedule dirty_work with the damage collected from the | |
97 | * mmap page writes. | |
d0ddc033 DV |
98 | */ |
99 | ||
207fd329 DV |
100 | /** |
101 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
102 | * emulation helper | |
103 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
104 | * | |
105 | * This functions adds all the available connectors for use with the given | |
106 | * fb_helper. This is a separate step to allow drivers to freely assign | |
107 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
108 | * not adequate to be used for the fbcon. | |
109 | * | |
169faeca DV |
110 | * This function is protected against concurrent connector hotadds/removals |
111 | * using drm_fb_helper_add_one_connector() and | |
112 | * drm_fb_helper_remove_one_connector(). | |
207fd329 | 113 | */ |
0b4c0f3f | 114 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 115 | { |
0b4c0f3f DA |
116 | struct drm_device *dev = fb_helper->dev; |
117 | struct drm_connector *connector; | |
15fce29d | 118 | int i, ret; |
d50ba256 | 119 | |
f64c5573 DV |
120 | if (!drm_fbdev_emulation) |
121 | return 0; | |
122 | ||
169faeca | 123 | mutex_lock(&dev->mode_config.mutex); |
6295d607 | 124 | drm_for_each_connector(connector, dev) { |
15fce29d | 125 | ret = drm_fb_helper_add_one_connector(fb_helper, connector); |
0b4c0f3f | 126 | |
15fce29d | 127 | if (ret) |
0b4c0f3f | 128 | goto fail; |
0b4c0f3f | 129 | } |
169faeca | 130 | mutex_unlock(&dev->mode_config.mutex); |
d50ba256 | 131 | return 0; |
0b4c0f3f DA |
132 | fail: |
133 | for (i = 0; i < fb_helper->connector_count; i++) { | |
134 | kfree(fb_helper->connector_info[i]); | |
135 | fb_helper->connector_info[i] = NULL; | |
136 | } | |
137 | fb_helper->connector_count = 0; | |
169faeca DV |
138 | mutex_unlock(&dev->mode_config.mutex); |
139 | ||
15fce29d | 140 | return ret; |
d50ba256 | 141 | } |
0b4c0f3f | 142 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 143 | |
65c2a89c DA |
144 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) |
145 | { | |
146 | struct drm_fb_helper_connector **temp; | |
147 | struct drm_fb_helper_connector *fb_helper_connector; | |
148 | ||
f64c5573 DV |
149 | if (!drm_fbdev_emulation) |
150 | return 0; | |
151 | ||
65c2a89c DA |
152 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
153 | if (fb_helper->connector_count + 1 > fb_helper->connector_info_alloc_count) { | |
14f476fa | 154 | temp = krealloc(fb_helper->connector_info, sizeof(struct drm_fb_helper_connector *) * (fb_helper->connector_count + 1), GFP_KERNEL); |
65c2a89c DA |
155 | if (!temp) |
156 | return -ENOMEM; | |
157 | ||
158 | fb_helper->connector_info_alloc_count = fb_helper->connector_count + 1; | |
159 | fb_helper->connector_info = temp; | |
160 | } | |
161 | ||
162 | ||
163 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
164 | if (!fb_helper_connector) | |
165 | return -ENOMEM; | |
166 | ||
6e86d58b | 167 | drm_connector_reference(connector); |
65c2a89c DA |
168 | fb_helper_connector->connector = connector; |
169 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
170 | return 0; | |
171 | } | |
172 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); | |
173 | ||
174 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, | |
175 | struct drm_connector *connector) | |
176 | { | |
177 | struct drm_fb_helper_connector *fb_helper_connector; | |
178 | int i, j; | |
179 | ||
f64c5573 DV |
180 | if (!drm_fbdev_emulation) |
181 | return 0; | |
182 | ||
65c2a89c DA |
183 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
184 | ||
185 | for (i = 0; i < fb_helper->connector_count; i++) { | |
186 | if (fb_helper->connector_info[i]->connector == connector) | |
187 | break; | |
188 | } | |
189 | ||
190 | if (i == fb_helper->connector_count) | |
191 | return -EINVAL; | |
192 | fb_helper_connector = fb_helper->connector_info[i]; | |
6e86d58b | 193 | drm_connector_unreference(fb_helper_connector->connector); |
65c2a89c DA |
194 | |
195 | for (j = i + 1; j < fb_helper->connector_count; j++) { | |
196 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; | |
197 | } | |
198 | fb_helper->connector_count--; | |
199 | kfree(fb_helper_connector); | |
2148f18f | 200 | |
65c2a89c DA |
201 | return 0; |
202 | } | |
203 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); | |
204 | ||
99231028 JW |
205 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
206 | { | |
207 | uint16_t *r_base, *g_base, *b_base; | |
208 | int i; | |
209 | ||
04c0c569 VS |
210 | if (helper->funcs->gamma_get == NULL) |
211 | return; | |
212 | ||
99231028 JW |
213 | r_base = crtc->gamma_store; |
214 | g_base = r_base + crtc->gamma_size; | |
215 | b_base = g_base + crtc->gamma_size; | |
216 | ||
217 | for (i = 0; i < crtc->gamma_size; i++) | |
218 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
219 | } | |
220 | ||
221 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
222 | { | |
223 | uint16_t *r_base, *g_base, *b_base; | |
224 | ||
ebe0f244 LP |
225 | if (crtc->funcs->gamma_set == NULL) |
226 | return; | |
227 | ||
99231028 JW |
228 | r_base = crtc->gamma_store; |
229 | g_base = r_base + crtc->gamma_size; | |
230 | b_base = g_base + crtc->gamma_size; | |
231 | ||
7ea77283 | 232 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); |
99231028 JW |
233 | } |
234 | ||
207fd329 DV |
235 | /** |
236 | * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter | |
237 | * @info: fbdev registered by the helper | |
238 | */ | |
1a7aba7f JB |
239 | int drm_fb_helper_debug_enter(struct fb_info *info) |
240 | { | |
241 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 242 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
243 | int i; |
244 | ||
1a7aba7f JB |
245 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
246 | for (i = 0; i < helper->crtc_count; i++) { | |
247 | struct drm_mode_set *mode_set = | |
248 | &helper->crtc_info[i].mode_set; | |
249 | ||
250 | if (!mode_set->crtc->enabled) | |
251 | continue; | |
252 | ||
253 | funcs = mode_set->crtc->helper_private; | |
99231028 | 254 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
255 | funcs->mode_set_base_atomic(mode_set->crtc, |
256 | mode_set->fb, | |
257 | mode_set->x, | |
413d45d3 | 258 | mode_set->y, |
21c74a8e | 259 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
260 | } |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
265 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
266 | ||
267 | /* Find the real fb for a given fb helper CRTC */ | |
268 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
269 | { | |
270 | struct drm_device *dev = crtc->dev; | |
271 | struct drm_crtc *c; | |
272 | ||
6295d607 | 273 | drm_for_each_crtc(c, dev) { |
1a7aba7f | 274 | if (crtc->base.id == c->base.id) |
f4510a27 | 275 | return c->primary->fb; |
1a7aba7f JB |
276 | } |
277 | ||
278 | return NULL; | |
279 | } | |
280 | ||
207fd329 DV |
281 | /** |
282 | * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave | |
283 | * @info: fbdev registered by the helper | |
284 | */ | |
1a7aba7f JB |
285 | int drm_fb_helper_debug_leave(struct fb_info *info) |
286 | { | |
287 | struct drm_fb_helper *helper = info->par; | |
288 | struct drm_crtc *crtc; | |
be26a66d | 289 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
290 | struct drm_framebuffer *fb; |
291 | int i; | |
292 | ||
293 | for (i = 0; i < helper->crtc_count; i++) { | |
294 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
295 | crtc = mode_set->crtc; | |
296 | funcs = crtc->helper_private; | |
297 | fb = drm_mode_config_fb(crtc); | |
298 | ||
299 | if (!crtc->enabled) | |
300 | continue; | |
301 | ||
302 | if (!fb) { | |
303 | DRM_ERROR("no fb to restore??\n"); | |
304 | continue; | |
305 | } | |
306 | ||
99231028 | 307 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 308 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 309 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
310 | } |
311 | ||
312 | return 0; | |
313 | } | |
314 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
315 | ||
bbb1e524 RC |
316 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
317 | { | |
318 | struct drm_device *dev = fb_helper->dev; | |
319 | struct drm_plane *plane; | |
320 | struct drm_atomic_state *state; | |
321 | int i, ret; | |
f72c6b33 | 322 | unsigned plane_mask; |
bbb1e524 RC |
323 | |
324 | state = drm_atomic_state_alloc(dev); | |
325 | if (!state) | |
326 | return -ENOMEM; | |
327 | ||
328 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
329 | retry: | |
f72c6b33 | 330 | plane_mask = 0; |
bbb1e524 RC |
331 | drm_for_each_plane(plane, dev) { |
332 | struct drm_plane_state *plane_state; | |
333 | ||
334 | plane_state = drm_atomic_get_plane_state(state, plane); | |
335 | if (IS_ERR(plane_state)) { | |
336 | ret = PTR_ERR(plane_state); | |
337 | goto fail; | |
338 | } | |
339 | ||
31ad61e4 | 340 | plane_state->rotation = DRM_ROTATE_0; |
bbb1e524 | 341 | |
f72c6b33 ML |
342 | plane->old_fb = plane->fb; |
343 | plane_mask |= 1 << drm_plane_index(plane); | |
344 | ||
bbb1e524 RC |
345 | /* disable non-primary: */ |
346 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
347 | continue; | |
348 | ||
349 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
350 | if (ret != 0) | |
351 | goto fail; | |
352 | } | |
353 | ||
354 | for(i = 0; i < fb_helper->crtc_count; i++) { | |
355 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
356 | ||
357 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
358 | if (ret != 0) | |
359 | goto fail; | |
360 | } | |
361 | ||
362 | ret = drm_atomic_commit(state); | |
bbb1e524 RC |
363 | |
364 | fail: | |
f72c6b33 | 365 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
94284037 | 366 | |
bbb1e524 RC |
367 | if (ret == -EDEADLK) |
368 | goto backoff; | |
369 | ||
0853695c | 370 | drm_atomic_state_put(state); |
bbb1e524 RC |
371 | return ret; |
372 | ||
373 | backoff: | |
374 | drm_atomic_state_clear(state); | |
375 | drm_atomic_legacy_backoff(state); | |
376 | ||
377 | goto retry; | |
378 | } | |
379 | ||
b7bdf0a8 | 380 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 381 | { |
3858bc5d VS |
382 | struct drm_device *dev = fb_helper->dev; |
383 | struct drm_plane *plane; | |
3858bc5d VS |
384 | int i; |
385 | ||
386 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 387 | |
d3a46183 | 388 | if (dev->mode_config.funcs->atomic_commit) |
bbb1e524 RC |
389 | return restore_fbdev_mode_atomic(fb_helper); |
390 | ||
6295d607 | 391 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
392 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
393 | drm_plane_force_disable(plane); | |
6aed8ec3 | 394 | |
9783de20 | 395 | if (dev->mode_config.rotation_property) { |
3a5f87c2 TW |
396 | drm_mode_plane_set_obj_prop(plane, |
397 | dev->mode_config.rotation_property, | |
31ad61e4 | 398 | DRM_ROTATE_0); |
9783de20 SJ |
399 | } |
400 | } | |
401 | ||
e8e7a2b8 DA |
402 | for (i = 0; i < fb_helper->crtc_count; i++) { |
403 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
404 | struct drm_crtc *crtc = mode_set->crtc; |
405 | int ret; | |
406 | ||
03f9abb2 AD |
407 | if (crtc->funcs->cursor_set2) { |
408 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
409 | if (ret) | |
48f87dd1 | 410 | return ret; |
03f9abb2 | 411 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
412 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
413 | if (ret) | |
b7bdf0a8 | 414 | return ret; |
3858bc5d VS |
415 | } |
416 | ||
2d13b679 | 417 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 418 | if (ret) |
b7bdf0a8 | 419 | return ret; |
e8e7a2b8 | 420 | } |
b7bdf0a8 DV |
421 | |
422 | return 0; | |
e8e7a2b8 | 423 | } |
5ea1f752 RC |
424 | |
425 | /** | |
426 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
427 | * @fb_helper: fbcon to restore | |
428 | * | |
429 | * This should be called from driver's drm ->lastclose callback | |
430 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
431 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
432 | * |
433 | * RETURNS: | |
434 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 435 | */ |
b7bdf0a8 | 436 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
437 | { |
438 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
439 | bool do_delayed; |
440 | int ret; | |
e2809c7d | 441 | |
f64c5573 DV |
442 | if (!drm_fbdev_emulation) |
443 | return -ENODEV; | |
444 | ||
5ea1f752 RC |
445 | drm_modeset_lock_all(dev); |
446 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
447 | |
448 | do_delayed = fb_helper->delayed_hotplug; | |
449 | if (do_delayed) | |
450 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 451 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
452 | |
453 | if (do_delayed) | |
454 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
455 | return ret; |
456 | } | |
457 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 458 | |
2c4124fd GU |
459 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
460 | { | |
461 | struct drm_device *dev = fb_helper->dev; | |
462 | struct drm_crtc *crtc; | |
463 | int bound = 0, crtcs_bound = 0; | |
464 | ||
465 | /* Sometimes user space wants everything disabled, so don't steal the | |
466 | * display if there's a master. */ | |
f17b3ea3 | 467 | if (READ_ONCE(dev->master)) |
2c4124fd GU |
468 | return false; |
469 | ||
470 | drm_for_each_crtc(crtc, dev) { | |
471 | if (crtc->primary->fb) | |
472 | crtcs_bound++; | |
473 | if (crtc->primary->fb == fb_helper->fb) | |
474 | bound++; | |
475 | } | |
476 | ||
477 | if (bound < crtcs_bound) | |
478 | return false; | |
479 | ||
480 | return true; | |
481 | } | |
482 | ||
483 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
484 | /* |
485 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
486 | * and panic handling. | |
487 | */ | |
78b9c353 | 488 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 489 | { |
785b93ef DA |
490 | bool ret, error = false; |
491 | struct drm_fb_helper *helper; | |
492 | ||
493 | if (list_empty(&kernel_fb_helper_list)) | |
494 | return false; | |
495 | ||
496 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
497 | struct drm_device *dev = helper->dev; |
498 | ||
499 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
500 | continue; | |
501 | ||
dd908c86 | 502 | drm_modeset_lock_all(dev); |
3d9e35a9 | 503 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
504 | if (ret) |
505 | error = true; | |
cb597bb3 | 506 | drm_modeset_unlock_all(dev); |
785b93ef DA |
507 | } |
508 | return error; | |
509 | } | |
510 | ||
785b93ef DA |
511 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
512 | { | |
d21bf469 DV |
513 | bool ret; |
514 | ret = drm_fb_helper_force_kernel_mode(); | |
515 | if (ret == true) | |
516 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
517 | } |
518 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
519 | ||
1495cc9d | 520 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
521 | { |
522 | schedule_work(&drm_fb_helper_restore_work); | |
523 | } | |
524 | ||
525 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
526 | .handler = drm_fb_helper_sysrq, | |
527 | .help_msg = "force-fb(V)", | |
528 | .action_msg = "Restore framebuffer console", | |
529 | }; | |
b8c40d62 RD |
530 | #else |
531 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 532 | #endif |
785b93ef | 533 | |
3a8148c5 | 534 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
535 | { |
536 | struct drm_fb_helper *fb_helper = info->par; | |
537 | struct drm_device *dev = fb_helper->dev; | |
538 | struct drm_crtc *crtc; | |
023eb571 | 539 | struct drm_connector *connector; |
023eb571 | 540 | int i, j; |
785b93ef DA |
541 | |
542 | /* | |
3a8148c5 | 543 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 544 | */ |
84849903 | 545 | drm_modeset_lock_all(dev); |
20c60c35 DV |
546 | if (!drm_fb_helper_is_bound(fb_helper)) { |
547 | drm_modeset_unlock_all(dev); | |
548 | return; | |
549 | } | |
550 | ||
e87b2c42 | 551 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 552 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 553 | |
8be48d92 DA |
554 | if (!crtc->enabled) |
555 | continue; | |
556 | ||
3a8148c5 | 557 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
558 | for (j = 0; j < fb_helper->connector_count; j++) { |
559 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 560 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 561 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 562 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 563 | } |
785b93ef | 564 | } |
84849903 | 565 | drm_modeset_unlock_all(dev); |
785b93ef DA |
566 | } |
567 | ||
207fd329 DV |
568 | /** |
569 | * drm_fb_helper_blank - implementation for ->fb_blank | |
570 | * @blank: desired blanking state | |
571 | * @info: fbdev registered by the helper | |
572 | */ | |
785b93ef DA |
573 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
574 | { | |
c50bfd08 DV |
575 | if (oops_in_progress) |
576 | return -EBUSY; | |
577 | ||
785b93ef | 578 | switch (blank) { |
731b5a15 | 579 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 580 | case FB_BLANK_UNBLANK: |
3a8148c5 | 581 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 582 | break; |
731b5a15 | 583 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 584 | case FB_BLANK_NORMAL: |
3a8148c5 | 585 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 586 | break; |
731b5a15 | 587 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 588 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 589 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 590 | break; |
731b5a15 | 591 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 592 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 593 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 594 | break; |
731b5a15 | 595 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 596 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 597 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
598 | break; |
599 | } | |
600 | return 0; | |
601 | } | |
602 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
603 | ||
604 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
605 | { | |
606 | int i; | |
607 | ||
6e86d58b DA |
608 | for (i = 0; i < helper->connector_count; i++) { |
609 | drm_connector_unreference(helper->connector_info[i]->connector); | |
0b4c0f3f | 610 | kfree(helper->connector_info[i]); |
6e86d58b | 611 | } |
0b4c0f3f | 612 | kfree(helper->connector_info); |
a1b7736d | 613 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 614 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
615 | if (helper->crtc_info[i].mode_set.mode) |
616 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
617 | } | |
785b93ef DA |
618 | kfree(helper->crtc_info); |
619 | } | |
620 | ||
cfe63423 NT |
621 | static void drm_fb_helper_resume_worker(struct work_struct *work) |
622 | { | |
623 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
624 | resume_work); | |
625 | ||
626 | console_lock(); | |
627 | fb_set_suspend(helper->fbdev, 0); | |
628 | console_unlock(); | |
629 | } | |
630 | ||
eaa434de NT |
631 | static void drm_fb_helper_dirty_work(struct work_struct *work) |
632 | { | |
633 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
634 | dirty_work); | |
635 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
636 | struct drm_clip_rect clip_copy; | |
637 | unsigned long flags; | |
638 | ||
639 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
640 | clip_copy = *clip; | |
641 | clip->x1 = clip->y1 = ~0; | |
642 | clip->x2 = clip->y2 = 0; | |
643 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
644 | ||
645 | helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); | |
646 | } | |
647 | ||
10a23102 TR |
648 | /** |
649 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
650 | * @dev: DRM device | |
651 | * @helper: driver-allocated fbdev helper structure to set up | |
652 | * @funcs: pointer to structure of functions associate with this helper | |
653 | * | |
654 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
655 | * useful to implement race-free initialization of the polling helpers. | |
656 | */ | |
657 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
658 | const struct drm_fb_helper_funcs *funcs) | |
659 | { | |
660 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
eaa434de | 661 | spin_lock_init(&helper->dirty_lock); |
cfe63423 | 662 | INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker); |
eaa434de NT |
663 | INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work); |
664 | helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0; | |
10a23102 TR |
665 | helper->funcs = funcs; |
666 | helper->dev = dev; | |
667 | } | |
668 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
669 | ||
207fd329 DV |
670 | /** |
671 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
672 | * @dev: drm device | |
673 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
674 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
675 | * @max_conn_count: max connector count | |
676 | * | |
677 | * This allocates the structures for the fbdev helper with the given limits. | |
678 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
679 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
680 | * to allow driver writes more control over the exact init sequence. | |
681 | * | |
10a23102 | 682 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
683 | * |
684 | * RETURNS: | |
685 | * Zero if everything went ok, nonzero otherwise. | |
686 | */ | |
4abe3520 DA |
687 | int drm_fb_helper_init(struct drm_device *dev, |
688 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 689 | int crtc_count, int max_conn_count) |
785b93ef | 690 | { |
785b93ef | 691 | struct drm_crtc *crtc; |
785b93ef DA |
692 | int i; |
693 | ||
f64c5573 DV |
694 | if (!drm_fbdev_emulation) |
695 | return 0; | |
696 | ||
04cfe97e XL |
697 | if (!max_conn_count) |
698 | return -EINVAL; | |
699 | ||
4abe3520 DA |
700 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
701 | if (!fb_helper->crtc_info) | |
785b93ef DA |
702 | return -ENOMEM; |
703 | ||
4abe3520 DA |
704 | fb_helper->crtc_count = crtc_count; |
705 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
706 | if (!fb_helper->connector_info) { | |
707 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
708 | return -ENOMEM; |
709 | } | |
65c2a89c | 710 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 711 | fb_helper->connector_count = 0; |
785b93ef DA |
712 | |
713 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 714 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
715 | kcalloc(max_conn_count, |
716 | sizeof(struct drm_connector *), | |
717 | GFP_KERNEL); | |
718 | ||
4a1b0714 | 719 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 720 | goto out_free; |
4abe3520 | 721 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
722 | } |
723 | ||
724 | i = 0; | |
6295d607 | 725 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 726 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
727 | i++; |
728 | } | |
e9ad3181 | 729 | |
785b93ef DA |
730 | return 0; |
731 | out_free: | |
4abe3520 | 732 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
733 | return -ENOMEM; |
734 | } | |
4abe3520 DA |
735 | EXPORT_SYMBOL(drm_fb_helper_init); |
736 | ||
b8017d6c AT |
737 | /** |
738 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
739 | * @fb_helper: driver-allocated fbdev helper | |
740 | * | |
741 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
742 | * by the driver within the fb_probe fb_helper callback function. | |
743 | * | |
744 | * RETURNS: | |
745 | * fb_info pointer if things went okay, pointer containing error code | |
746 | * otherwise | |
747 | */ | |
748 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
749 | { | |
750 | struct device *dev = fb_helper->dev->dev; | |
751 | struct fb_info *info; | |
752 | int ret; | |
753 | ||
754 | info = framebuffer_alloc(0, dev); | |
755 | if (!info) | |
756 | return ERR_PTR(-ENOMEM); | |
757 | ||
758 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
759 | if (ret) | |
760 | goto err_release; | |
761 | ||
762 | info->apertures = alloc_apertures(1); | |
763 | if (!info->apertures) { | |
764 | ret = -ENOMEM; | |
765 | goto err_free_cmap; | |
766 | } | |
767 | ||
768 | fb_helper->fbdev = info; | |
769 | ||
770 | return info; | |
771 | ||
772 | err_free_cmap: | |
773 | fb_dealloc_cmap(&info->cmap); | |
774 | err_release: | |
775 | framebuffer_release(info); | |
776 | return ERR_PTR(ret); | |
777 | } | |
778 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
779 | ||
780 | /** | |
781 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
782 | * @fb_helper: driver-allocated fbdev helper | |
783 | * | |
784 | * A wrapper around unregister_framebuffer, to release the fb_info | |
785 | * framebuffer device | |
786 | */ | |
787 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
788 | { | |
789 | if (fb_helper && fb_helper->fbdev) | |
790 | unregister_framebuffer(fb_helper->fbdev); | |
791 | } | |
792 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
793 | ||
794 | /** | |
795 | * drm_fb_helper_release_fbi - dealloc fb_info and its members | |
796 | * @fb_helper: driver-allocated fbdev helper | |
797 | * | |
798 | * A helper to free memory taken by fb_info and the members cmap and | |
799 | * apertures | |
800 | */ | |
801 | void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) | |
802 | { | |
803 | if (fb_helper) { | |
804 | struct fb_info *info = fb_helper->fbdev; | |
805 | ||
806 | if (info) { | |
807 | if (info->cmap.len) | |
808 | fb_dealloc_cmap(&info->cmap); | |
809 | framebuffer_release(info); | |
810 | } | |
811 | ||
812 | fb_helper->fbdev = NULL; | |
813 | } | |
814 | } | |
815 | EXPORT_SYMBOL(drm_fb_helper_release_fbi); | |
816 | ||
4abe3520 DA |
817 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
818 | { | |
f64c5573 DV |
819 | if (!drm_fbdev_emulation) |
820 | return; | |
821 | ||
4abe3520 DA |
822 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
823 | list_del(&fb_helper->kernel_fb_list); | |
824 | if (list_empty(&kernel_fb_helper_list)) { | |
4abe3520 DA |
825 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
826 | } | |
827 | } | |
828 | ||
829 | drm_fb_helper_crtc_free(fb_helper); | |
830 | ||
4abe3520 DA |
831 | } |
832 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 833 | |
47074ab7 AT |
834 | /** |
835 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
836 | * @fb_helper: driver-allocated fbdev helper | |
837 | * | |
838 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
839 | */ | |
840 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
841 | { | |
842 | if (fb_helper && fb_helper->fbdev) | |
843 | unlink_framebuffer(fb_helper->fbdev); | |
844 | } | |
845 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
846 | ||
eaa434de NT |
847 | static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y, |
848 | u32 width, u32 height) | |
849 | { | |
850 | struct drm_fb_helper *helper = info->par; | |
851 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
852 | unsigned long flags; | |
853 | ||
854 | if (!helper->fb->funcs->dirty) | |
855 | return; | |
856 | ||
857 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
858 | clip->x1 = min_t(u32, clip->x1, x); | |
859 | clip->y1 = min_t(u32, clip->y1, y); | |
860 | clip->x2 = max_t(u32, clip->x2, x + width); | |
861 | clip->y2 = max_t(u32, clip->y2, y + height); | |
862 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
863 | ||
864 | schedule_work(&helper->dirty_work); | |
865 | } | |
866 | ||
867 | /** | |
868 | * drm_fb_helper_deferred_io() - fbdev deferred_io callback function | |
869 | * @info: fb_info struct pointer | |
870 | * @pagelist: list of dirty mmap framebuffer pages | |
871 | * | |
872 | * This function is used as the &fb_deferred_io ->deferred_io | |
873 | * callback function for flushing the fbdev mmap writes. | |
874 | */ | |
875 | void drm_fb_helper_deferred_io(struct fb_info *info, | |
876 | struct list_head *pagelist) | |
877 | { | |
878 | unsigned long start, end, min, max; | |
879 | struct page *page; | |
880 | u32 y1, y2; | |
881 | ||
882 | min = ULONG_MAX; | |
883 | max = 0; | |
884 | list_for_each_entry(page, pagelist, lru) { | |
885 | start = page->index << PAGE_SHIFT; | |
886 | end = start + PAGE_SIZE - 1; | |
887 | min = min(min, start); | |
888 | max = max(max, end); | |
889 | } | |
890 | ||
891 | if (min < max) { | |
892 | y1 = min / info->fix.line_length; | |
893 | y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length), | |
894 | info->var.yres); | |
895 | drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1); | |
896 | } | |
897 | } | |
898 | EXPORT_SYMBOL(drm_fb_helper_deferred_io); | |
899 | ||
cbb1a82e AT |
900 | /** |
901 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
902 | * @info: fb_info struct pointer | |
903 | * @buf: userspace buffer to read from framebuffer memory | |
904 | * @count: number of bytes to read from framebuffer memory | |
905 | * @ppos: read offset within framebuffer memory | |
906 | * | |
907 | * A wrapper around fb_sys_read implemented by fbdev core | |
908 | */ | |
909 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
910 | size_t count, loff_t *ppos) | |
911 | { | |
912 | return fb_sys_read(info, buf, count, ppos); | |
913 | } | |
914 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
915 | ||
916 | /** | |
917 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
918 | * @info: fb_info struct pointer | |
919 | * @buf: userspace buffer to write to framebuffer memory | |
920 | * @count: number of bytes to write to framebuffer memory | |
921 | * @ppos: write offset within framebuffer memory | |
922 | * | |
923 | * A wrapper around fb_sys_write implemented by fbdev core | |
924 | */ | |
925 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
926 | size_t count, loff_t *ppos) | |
927 | { | |
eaa434de NT |
928 | ssize_t ret; |
929 | ||
930 | ret = fb_sys_write(info, buf, count, ppos); | |
931 | if (ret > 0) | |
932 | drm_fb_helper_dirty(info, 0, 0, info->var.xres, | |
933 | info->var.yres); | |
934 | ||
935 | return ret; | |
cbb1a82e AT |
936 | } |
937 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
938 | ||
742547b7 AT |
939 | /** |
940 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
941 | * @info: fbdev registered by the helper | |
942 | * @rect: info about rectangle to fill | |
943 | * | |
944 | * A wrapper around sys_fillrect implemented by fbdev core | |
945 | */ | |
946 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
947 | const struct fb_fillrect *rect) | |
948 | { | |
949 | sys_fillrect(info, rect); | |
eaa434de NT |
950 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
951 | rect->width, rect->height); | |
742547b7 AT |
952 | } |
953 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
954 | ||
955 | /** | |
956 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
957 | * @info: fbdev registered by the helper | |
958 | * @area: info about area to copy | |
959 | * | |
960 | * A wrapper around sys_copyarea implemented by fbdev core | |
961 | */ | |
962 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
963 | const struct fb_copyarea *area) | |
964 | { | |
965 | sys_copyarea(info, area); | |
eaa434de NT |
966 | drm_fb_helper_dirty(info, area->dx, area->dy, |
967 | area->width, area->height); | |
742547b7 AT |
968 | } |
969 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
970 | ||
971 | /** | |
972 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
973 | * @info: fbdev registered by the helper | |
974 | * @image: info about image to blit | |
975 | * | |
976 | * A wrapper around sys_imageblit implemented by fbdev core | |
977 | */ | |
978 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
979 | const struct fb_image *image) | |
980 | { | |
981 | sys_imageblit(info, image); | |
eaa434de NT |
982 | drm_fb_helper_dirty(info, image->dx, image->dy, |
983 | image->width, image->height); | |
742547b7 AT |
984 | } |
985 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
986 | ||
987 | /** | |
988 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
989 | * @info: fbdev registered by the helper | |
990 | * @rect: info about rectangle to fill | |
991 | * | |
992 | * A wrapper around cfb_imageblit implemented by fbdev core | |
993 | */ | |
994 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
995 | const struct fb_fillrect *rect) | |
996 | { | |
997 | cfb_fillrect(info, rect); | |
eaa434de NT |
998 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
999 | rect->width, rect->height); | |
742547b7 AT |
1000 | } |
1001 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
1002 | ||
1003 | /** | |
1004 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
1005 | * @info: fbdev registered by the helper | |
1006 | * @area: info about area to copy | |
1007 | * | |
1008 | * A wrapper around cfb_copyarea implemented by fbdev core | |
1009 | */ | |
1010 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
1011 | const struct fb_copyarea *area) | |
1012 | { | |
1013 | cfb_copyarea(info, area); | |
eaa434de NT |
1014 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1015 | area->width, area->height); | |
742547b7 AT |
1016 | } |
1017 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
1018 | ||
1019 | /** | |
1020 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
1021 | * @info: fbdev registered by the helper | |
1022 | * @image: info about image to blit | |
1023 | * | |
1024 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1025 | */ | |
1026 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
1027 | const struct fb_image *image) | |
1028 | { | |
1029 | cfb_imageblit(info, image); | |
eaa434de NT |
1030 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1031 | image->width, image->height); | |
742547b7 AT |
1032 | } |
1033 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
1034 | ||
fdefa58a AT |
1035 | /** |
1036 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
1037 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1038 | * @suspend: whether to suspend or resume |
fdefa58a | 1039 | * |
cfe63423 NT |
1040 | * A wrapper around fb_set_suspend implemented by fbdev core. |
1041 | * Use drm_fb_helper_set_suspend_unlocked() if you don't need to take | |
1042 | * the lock yourself | |
fdefa58a | 1043 | */ |
28579f37 | 1044 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend) |
fdefa58a AT |
1045 | { |
1046 | if (fb_helper && fb_helper->fbdev) | |
28579f37 | 1047 | fb_set_suspend(fb_helper->fbdev, suspend); |
fdefa58a AT |
1048 | } |
1049 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
1050 | ||
cfe63423 NT |
1051 | /** |
1052 | * drm_fb_helper_set_suspend_unlocked - wrapper around fb_set_suspend that also | |
1053 | * takes the console lock | |
1054 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1055 | * @suspend: whether to suspend or resume |
cfe63423 NT |
1056 | * |
1057 | * A wrapper around fb_set_suspend() that takes the console lock. If the lock | |
1058 | * isn't available on resume, a worker is tasked with waiting for the lock | |
1059 | * to become available. The console lock can be pretty contented on resume | |
1060 | * due to all the printk activity. | |
1061 | * | |
1062 | * This function can be called multiple times with the same state since | |
1063 | * &fb_info->state is checked to see if fbdev is running or not before locking. | |
1064 | * | |
1065 | * Use drm_fb_helper_set_suspend() if you need to take the lock yourself. | |
1066 | */ | |
1067 | void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, | |
28579f37 | 1068 | bool suspend) |
cfe63423 NT |
1069 | { |
1070 | if (!fb_helper || !fb_helper->fbdev) | |
1071 | return; | |
1072 | ||
1073 | /* make sure there's no pending/ongoing resume */ | |
1074 | flush_work(&fb_helper->resume_work); | |
1075 | ||
1076 | if (suspend) { | |
1077 | if (fb_helper->fbdev->state != FBINFO_STATE_RUNNING) | |
1078 | return; | |
1079 | ||
1080 | console_lock(); | |
1081 | ||
1082 | } else { | |
1083 | if (fb_helper->fbdev->state == FBINFO_STATE_RUNNING) | |
1084 | return; | |
1085 | ||
1086 | if (!console_trylock()) { | |
1087 | schedule_work(&fb_helper->resume_work); | |
1088 | return; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | fb_set_suspend(fb_helper->fbdev, suspend); | |
1093 | console_unlock(); | |
1094 | } | |
1095 | EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked); | |
1096 | ||
c850cb78 | 1097 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
1098 | u16 blue, u16 regno, struct fb_info *info) |
1099 | { | |
1100 | struct drm_fb_helper *fb_helper = info->par; | |
1101 | struct drm_framebuffer *fb = fb_helper->fb; | |
b8c00ac5 | 1102 | |
c850cb78 DA |
1103 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
1104 | u32 *palette; | |
1105 | u32 value; | |
1106 | /* place color in psuedopalette */ | |
1107 | if (regno > 16) | |
1108 | return -EINVAL; | |
1109 | palette = (u32 *)info->pseudo_palette; | |
1110 | red >>= (16 - info->var.red.length); | |
1111 | green >>= (16 - info->var.green.length); | |
1112 | blue >>= (16 - info->var.blue.length); | |
1113 | value = (red << info->var.red.offset) | | |
1114 | (green << info->var.green.offset) | | |
1115 | (blue << info->var.blue.offset); | |
9da12b6a RC |
1116 | if (info->var.transp.length > 0) { |
1117 | u32 mask = (1 << info->var.transp.length) - 1; | |
1118 | mask <<= info->var.transp.offset; | |
1119 | value |= mask; | |
1120 | } | |
c850cb78 DA |
1121 | palette[regno] = value; |
1122 | return 0; | |
1123 | } | |
1124 | ||
04c0c569 VS |
1125 | /* |
1126 | * The driver really shouldn't advertise pseudo/directcolor | |
1127 | * visuals if it can't deal with the palette. | |
1128 | */ | |
1129 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1130 | !fb_helper->funcs->gamma_get)) | |
1131 | return -EINVAL; | |
1132 | ||
fef1480d | 1133 | WARN_ON(fb->bits_per_pixel != 8); |
b8c00ac5 | 1134 | |
fef1480d | 1135 | fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); |
b8c00ac5 | 1136 | |
c850cb78 | 1137 | return 0; |
b8c00ac5 DA |
1138 | } |
1139 | ||
207fd329 DV |
1140 | /** |
1141 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
1142 | * @cmap: cmap to set | |
1143 | * @info: fbdev registered by the helper | |
1144 | */ | |
068143d3 DA |
1145 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1146 | { | |
1147 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1148 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1149 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1150 | u16 *red, *green, *blue, *transp; |
1151 | struct drm_crtc *crtc; | |
062ac622 | 1152 | int i, j, rc = 0; |
068143d3 DA |
1153 | int start; |
1154 | ||
c50bfd08 | 1155 | if (oops_in_progress) |
9aa609e1 | 1156 | return -EBUSY; |
c50bfd08 DV |
1157 | |
1158 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1159 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1160 | drm_modeset_unlock_all(dev); | |
1161 | return -EBUSY; | |
1162 | } | |
1163 | ||
8be48d92 DA |
1164 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1165 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1166 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1167 | |
1168 | red = cmap->red; | |
1169 | green = cmap->green; | |
1170 | blue = cmap->blue; | |
1171 | transp = cmap->transp; | |
1172 | start = cmap->start; | |
1173 | ||
062ac622 | 1174 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1175 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1176 | ||
1177 | hred = *red++; | |
1178 | hgreen = *green++; | |
1179 | hblue = *blue++; | |
1180 | ||
1181 | if (transp) | |
1182 | htransp = *transp++; | |
1183 | ||
c850cb78 DA |
1184 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1185 | if (rc) | |
8391a3d5 | 1186 | goto out; |
068143d3 | 1187 | } |
04c0c569 VS |
1188 | if (crtc_funcs->load_lut) |
1189 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1190 | } |
8391a3d5 VS |
1191 | out: |
1192 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1193 | return rc; |
1194 | } | |
1195 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1196 | ||
207fd329 DV |
1197 | /** |
1198 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
1199 | * @var: screeninfo to check | |
1200 | * @info: fbdev registered by the helper | |
1201 | */ | |
785b93ef DA |
1202 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1203 | struct fb_info *info) | |
1204 | { | |
1205 | struct drm_fb_helper *fb_helper = info->par; | |
1206 | struct drm_framebuffer *fb = fb_helper->fb; | |
1207 | int depth; | |
1208 | ||
f90ebd9e | 1209 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1210 | return -EINVAL; |
1211 | ||
1212 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
1213 | if (var->bits_per_pixel > fb->bits_per_pixel || |
1214 | var->xres > fb->width || var->yres > fb->height || | |
1215 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 1216 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
1217 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1218 | var->xres, var->yres, var->bits_per_pixel, | |
1219 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 1220 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
1221 | return -EINVAL; |
1222 | } | |
1223 | ||
1224 | switch (var->bits_per_pixel) { | |
1225 | case 16: | |
1226 | depth = (var->green.length == 6) ? 16 : 15; | |
1227 | break; | |
1228 | case 32: | |
1229 | depth = (var->transp.length > 0) ? 32 : 24; | |
1230 | break; | |
1231 | default: | |
1232 | depth = var->bits_per_pixel; | |
1233 | break; | |
1234 | } | |
1235 | ||
1236 | switch (depth) { | |
1237 | case 8: | |
1238 | var->red.offset = 0; | |
1239 | var->green.offset = 0; | |
1240 | var->blue.offset = 0; | |
1241 | var->red.length = 8; | |
1242 | var->green.length = 8; | |
1243 | var->blue.length = 8; | |
1244 | var->transp.length = 0; | |
1245 | var->transp.offset = 0; | |
1246 | break; | |
1247 | case 15: | |
1248 | var->red.offset = 10; | |
1249 | var->green.offset = 5; | |
1250 | var->blue.offset = 0; | |
1251 | var->red.length = 5; | |
1252 | var->green.length = 5; | |
1253 | var->blue.length = 5; | |
1254 | var->transp.length = 1; | |
1255 | var->transp.offset = 15; | |
1256 | break; | |
1257 | case 16: | |
1258 | var->red.offset = 11; | |
1259 | var->green.offset = 5; | |
1260 | var->blue.offset = 0; | |
1261 | var->red.length = 5; | |
1262 | var->green.length = 6; | |
1263 | var->blue.length = 5; | |
1264 | var->transp.length = 0; | |
1265 | var->transp.offset = 0; | |
1266 | break; | |
1267 | case 24: | |
1268 | var->red.offset = 16; | |
1269 | var->green.offset = 8; | |
1270 | var->blue.offset = 0; | |
1271 | var->red.length = 8; | |
1272 | var->green.length = 8; | |
1273 | var->blue.length = 8; | |
1274 | var->transp.length = 0; | |
1275 | var->transp.offset = 0; | |
1276 | break; | |
1277 | case 32: | |
1278 | var->red.offset = 16; | |
1279 | var->green.offset = 8; | |
1280 | var->blue.offset = 0; | |
1281 | var->red.length = 8; | |
1282 | var->green.length = 8; | |
1283 | var->blue.length = 8; | |
1284 | var->transp.length = 8; | |
1285 | var->transp.offset = 24; | |
1286 | break; | |
1287 | default: | |
1288 | return -EINVAL; | |
1289 | } | |
1290 | return 0; | |
1291 | } | |
1292 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1293 | ||
207fd329 DV |
1294 | /** |
1295 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
1296 | * @info: fbdev registered by the helper | |
1297 | * | |
1298 | * This will let fbcon do the mode init and is called at initialization time by | |
1299 | * the fbdev core when registering the driver, and later on through the hotplug | |
1300 | * callback. | |
1301 | */ | |
785b93ef DA |
1302 | int drm_fb_helper_set_par(struct fb_info *info) |
1303 | { | |
1304 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1305 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1306 | |
c50bfd08 DV |
1307 | if (oops_in_progress) |
1308 | return -EBUSY; | |
1309 | ||
5349ef31 | 1310 | if (var->pixclock != 0) { |
172e91f5 | 1311 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1312 | return -EINVAL; |
1313 | } | |
1314 | ||
5ea1f752 | 1315 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1316 | |
785b93ef DA |
1317 | return 0; |
1318 | } | |
1319 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1320 | ||
1edf0269 | 1321 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1322 | struct fb_info *info) |
1edf0269 RC |
1323 | { |
1324 | struct drm_fb_helper *fb_helper = info->par; | |
1325 | struct drm_device *dev = fb_helper->dev; | |
1326 | struct drm_atomic_state *state; | |
07d3bad6 | 1327 | struct drm_plane *plane; |
1edf0269 | 1328 | int i, ret; |
07d3bad6 | 1329 | unsigned plane_mask; |
1edf0269 RC |
1330 | |
1331 | state = drm_atomic_state_alloc(dev); | |
1332 | if (!state) | |
1333 | return -ENOMEM; | |
1334 | ||
1335 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1336 | retry: | |
07d3bad6 | 1337 | plane_mask = 0; |
1edf0269 RC |
1338 | for(i = 0; i < fb_helper->crtc_count; i++) { |
1339 | struct drm_mode_set *mode_set; | |
1340 | ||
1341 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1342 | ||
1343 | mode_set->x = var->xoffset; | |
1344 | mode_set->y = var->yoffset; | |
1345 | ||
1346 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1347 | if (ret != 0) | |
1348 | goto fail; | |
07d3bad6 ML |
1349 | |
1350 | plane = mode_set->crtc->primary; | |
7118fd9b | 1351 | plane_mask |= (1 << drm_plane_index(plane)); |
07d3bad6 | 1352 | plane->old_fb = plane->fb; |
1edf0269 RC |
1353 | } |
1354 | ||
1355 | ret = drm_atomic_commit(state); | |
1356 | if (ret != 0) | |
1357 | goto fail; | |
1358 | ||
1359 | info->var.xoffset = var->xoffset; | |
1360 | info->var.yoffset = var->yoffset; | |
1361 | ||
1edf0269 | 1362 | fail: |
07d3bad6 | 1363 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
a0fb6ad7 | 1364 | |
1edf0269 RC |
1365 | if (ret == -EDEADLK) |
1366 | goto backoff; | |
1367 | ||
0853695c | 1368 | drm_atomic_state_put(state); |
1edf0269 RC |
1369 | return ret; |
1370 | ||
1371 | backoff: | |
1372 | drm_atomic_state_clear(state); | |
1373 | drm_atomic_legacy_backoff(state); | |
1374 | ||
1375 | goto retry; | |
1376 | } | |
1377 | ||
207fd329 DV |
1378 | /** |
1379 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
1380 | * @var: updated screen information | |
1381 | * @info: fbdev registered by the helper | |
1382 | */ | |
785b93ef DA |
1383 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1384 | struct fb_info *info) | |
1385 | { | |
1386 | struct drm_fb_helper *fb_helper = info->par; | |
1387 | struct drm_device *dev = fb_helper->dev; | |
1388 | struct drm_mode_set *modeset; | |
785b93ef DA |
1389 | int ret = 0; |
1390 | int i; | |
1391 | ||
c50bfd08 | 1392 | if (oops_in_progress) |
9aa609e1 | 1393 | return -EBUSY; |
c50bfd08 DV |
1394 | |
1395 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1396 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1397 | drm_modeset_unlock_all(dev); | |
1398 | return -EBUSY; | |
1399 | } | |
1400 | ||
d3a46183 | 1401 | if (dev->mode_config.funcs->atomic_commit) { |
1edf0269 RC |
1402 | ret = pan_display_atomic(var, info); |
1403 | goto unlock; | |
1404 | } | |
1405 | ||
8be48d92 | 1406 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1407 | modeset = &fb_helper->crtc_info[i].mode_set; |
1408 | ||
1409 | modeset->x = var->xoffset; | |
1410 | modeset->y = var->yoffset; | |
1411 | ||
1412 | if (modeset->num_connectors) { | |
2d13b679 | 1413 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1414 | if (!ret) { |
1415 | info->var.xoffset = var->xoffset; | |
1416 | info->var.yoffset = var->yoffset; | |
1417 | } | |
1418 | } | |
1419 | } | |
1edf0269 | 1420 | unlock: |
84849903 | 1421 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1422 | return ret; |
1423 | } | |
1424 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1425 | ||
8acf658a | 1426 | /* |
207fd329 DV |
1427 | * Allocates the backing storage and sets up the fbdev info structure through |
1428 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1429 | * notifier. | |
8acf658a | 1430 | */ |
de1ace5b DV |
1431 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1432 | int preferred_bpp) | |
785b93ef | 1433 | { |
8acf658a | 1434 | int ret = 0; |
785b93ef | 1435 | int crtc_count = 0; |
4abe3520 | 1436 | int i; |
785b93ef | 1437 | struct fb_info *info; |
38651674 | 1438 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1439 | int gamma_size = 0; |
38651674 DA |
1440 | |
1441 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1442 | sizes.surface_depth = 24; | |
1443 | sizes.surface_bpp = 32; | |
1444 | sizes.fb_width = (unsigned)-1; | |
1445 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 1446 | |
b8c00ac5 DA |
1447 | /* if driver picks 8 or 16 by default use that |
1448 | for both depth/bpp */ | |
96081cdf | 1449 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1450 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1451 | |
785b93ef | 1452 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
1453 | for (i = 0; i < fb_helper->connector_count; i++) { |
1454 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 1455 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1456 | |
eaf99c74 | 1457 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1458 | |
1459 | if (cmdline_mode->bpp_specified) { | |
1460 | switch (cmdline_mode->bpp) { | |
1461 | case 8: | |
38651674 | 1462 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1463 | break; |
1464 | case 15: | |
38651674 DA |
1465 | sizes.surface_depth = 15; |
1466 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1467 | break; |
1468 | case 16: | |
38651674 | 1469 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1470 | break; |
1471 | case 24: | |
38651674 | 1472 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1473 | break; |
1474 | case 32: | |
38651674 DA |
1475 | sizes.surface_depth = 24; |
1476 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1477 | break; |
1478 | } | |
1479 | break; | |
1480 | } | |
1481 | } | |
1482 | ||
8be48d92 DA |
1483 | crtc_count = 0; |
1484 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1485 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1486 | struct drm_mode_set *mode_set; |
1487 | int x, y, j; | |
1488 | /* in case of tile group, are we the last tile vert or horiz? | |
1489 | * If no tile group you are always the last one both vertically | |
1490 | * and horizontally | |
1491 | */ | |
1492 | bool lastv = true, lasth = true; | |
675c8328 | 1493 | |
8be48d92 | 1494 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1495 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1496 | |
1497 | if (!desired_mode) | |
1498 | continue; | |
1499 | ||
1500 | crtc_count++; | |
1501 | ||
b0ee9e7f DA |
1502 | x = fb_helper->crtc_info[i].x; |
1503 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1504 | |
1505 | if (gamma_size == 0) | |
1506 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1507 | ||
1508 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1509 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1510 | |
1511 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1512 | struct drm_connector *connector = mode_set->connectors[j]; | |
1513 | if (connector->has_tile) { | |
1514 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1515 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1516 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1517 | break; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | if (lasth) | |
1522 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1523 | if (lastv) | |
1524 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1525 | } |
1526 | ||
38651674 | 1527 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1528 | /* hmm everyone went away - assume VGA cable just fell out |
1529 | and will come back later. */ | |
eb1f8e4f | 1530 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1531 | sizes.fb_width = sizes.surface_width = 1024; |
1532 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1533 | } |
1534 | ||
38651674 | 1535 | /* push down into drivers */ |
8acf658a DV |
1536 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1537 | if (ret < 0) | |
1538 | return ret; | |
785b93ef | 1539 | |
38651674 | 1540 | info = fb_helper->fbdev; |
785b93ef | 1541 | |
7e53f3a4 DV |
1542 | /* |
1543 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1544 | * events, but at init time drm_setup_crtcs needs to be called before | |
1545 | * the fb is allocated (since we need to figure out the desired size of | |
1546 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1547 | * here again. | |
1548 | */ | |
96081cdf | 1549 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1550 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1551 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1552 | ||
785b93ef | 1553 | |
8acf658a DV |
1554 | info->var.pixclock = 0; |
1555 | if (register_framebuffer(info) < 0) | |
1556 | return -EINVAL; | |
38651674 | 1557 | |
8acf658a DV |
1558 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1559 | info->node, info->fix.id); | |
785b93ef | 1560 | |
785b93ef | 1561 | if (list_empty(&kernel_fb_helper_list)) { |
785b93ef DA |
1562 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
1563 | } | |
8acf658a DV |
1564 | |
1565 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1566 | |
785b93ef DA |
1567 | return 0; |
1568 | } | |
785b93ef | 1569 | |
207fd329 DV |
1570 | /** |
1571 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1572 | * @info: fbdev registered by the helper | |
1573 | * @pitch: desired pitch | |
1574 | * @depth: desired depth | |
1575 | * | |
1576 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1577 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1578 | * additional constraints need to set up their own limits. | |
1579 | * | |
1580 | * Drivers should call this (or their equivalent setup code) from their | |
1581 | * ->fb_probe callback. | |
1582 | */ | |
3632ef89 DA |
1583 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1584 | uint32_t depth) | |
1585 | { | |
1586 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1587 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1588 | FB_VISUAL_TRUECOLOR; | |
1589 | info->fix.mmio_start = 0; | |
1590 | info->fix.mmio_len = 0; | |
1591 | info->fix.type_aux = 0; | |
1592 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1593 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1594 | info->fix.ywrapstep = 0; | |
1595 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1596 | |
1597 | info->fix.line_length = pitch; | |
1598 | return; | |
1599 | } | |
1600 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1601 | ||
207fd329 DV |
1602 | /** |
1603 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1604 | * @info: fbdev instance to set up | |
1605 | * @fb_helper: fb helper instance to use as template | |
1606 | * @fb_width: desired fb width | |
1607 | * @fb_height: desired fb height | |
1608 | * | |
1609 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1610 | * and the drm framebuffer allocated in fb_helper->fb. | |
1611 | * | |
1612 | * Drivers should call this (or their equivalent setup code) from their | |
1613 | * ->fb_probe callback after having allocated the fbdev backing | |
1614 | * storage framebuffer. | |
1615 | */ | |
38651674 | 1616 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1617 | uint32_t fb_width, uint32_t fb_height) |
1618 | { | |
38651674 DA |
1619 | struct drm_framebuffer *fb = fb_helper->fb; |
1620 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1621 | info->var.xres_virtual = fb->width; |
1622 | info->var.yres_virtual = fb->height; | |
1623 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1624 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1625 | info->var.xoffset = 0; |
1626 | info->var.yoffset = 0; | |
1627 | info->var.activate = FB_ACTIVATE_NOW; | |
1628 | info->var.height = -1; | |
1629 | info->var.width = -1; | |
1630 | ||
1631 | switch (fb->depth) { | |
1632 | case 8: | |
1633 | info->var.red.offset = 0; | |
1634 | info->var.green.offset = 0; | |
1635 | info->var.blue.offset = 0; | |
1636 | info->var.red.length = 8; /* 8bit DAC */ | |
1637 | info->var.green.length = 8; | |
1638 | info->var.blue.length = 8; | |
1639 | info->var.transp.offset = 0; | |
1640 | info->var.transp.length = 0; | |
1641 | break; | |
1642 | case 15: | |
1643 | info->var.red.offset = 10; | |
1644 | info->var.green.offset = 5; | |
1645 | info->var.blue.offset = 0; | |
1646 | info->var.red.length = 5; | |
1647 | info->var.green.length = 5; | |
1648 | info->var.blue.length = 5; | |
1649 | info->var.transp.offset = 15; | |
1650 | info->var.transp.length = 1; | |
1651 | break; | |
1652 | case 16: | |
1653 | info->var.red.offset = 11; | |
1654 | info->var.green.offset = 5; | |
1655 | info->var.blue.offset = 0; | |
1656 | info->var.red.length = 5; | |
1657 | info->var.green.length = 6; | |
1658 | info->var.blue.length = 5; | |
1659 | info->var.transp.offset = 0; | |
1660 | break; | |
1661 | case 24: | |
1662 | info->var.red.offset = 16; | |
1663 | info->var.green.offset = 8; | |
1664 | info->var.blue.offset = 0; | |
1665 | info->var.red.length = 8; | |
1666 | info->var.green.length = 8; | |
1667 | info->var.blue.length = 8; | |
1668 | info->var.transp.offset = 0; | |
1669 | info->var.transp.length = 0; | |
1670 | break; | |
1671 | case 32: | |
1672 | info->var.red.offset = 16; | |
1673 | info->var.green.offset = 8; | |
1674 | info->var.blue.offset = 0; | |
1675 | info->var.red.length = 8; | |
1676 | info->var.green.length = 8; | |
1677 | info->var.blue.length = 8; | |
1678 | info->var.transp.offset = 24; | |
1679 | info->var.transp.length = 8; | |
1680 | break; | |
1681 | default: | |
1682 | break; | |
1683 | } | |
1684 | ||
1685 | info->var.xres = fb_width; | |
1686 | info->var.yres = fb_height; | |
1687 | } | |
1688 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1689 | |
0b4c0f3f DA |
1690 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1691 | uint32_t maxX, | |
1692 | uint32_t maxY) | |
38651674 DA |
1693 | { |
1694 | struct drm_connector *connector; | |
1695 | int count = 0; | |
0b4c0f3f | 1696 | int i; |
38651674 | 1697 | |
0b4c0f3f DA |
1698 | for (i = 0; i < fb_helper->connector_count; i++) { |
1699 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1700 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1701 | } | |
1702 | ||
1703 | return count; | |
1704 | } | |
1705 | ||
2f1046f3 | 1706 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1707 | { |
1708 | struct drm_display_mode *mode; | |
1709 | ||
0b4c0f3f | 1710 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1711 | if (mode->hdisplay > width || |
1712 | mode->vdisplay > height) | |
38651674 DA |
1713 | continue; |
1714 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1715 | return mode; | |
1716 | } | |
1717 | return NULL; | |
1718 | } | |
2f1046f3 | 1719 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1720 | |
0b4c0f3f | 1721 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1722 | { |
eaf99c74 | 1723 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1724 | } |
1725 | ||
2f1046f3 | 1726 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1727 | int width, int height) |
38651674 | 1728 | { |
1794d257 | 1729 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1730 | struct drm_display_mode *mode; |
c683f427 | 1731 | bool prefer_non_interlace; |
38651674 | 1732 | |
eaf99c74 | 1733 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1734 | if (cmdline_mode->specified == false) |
f3af5c7d | 1735 | return NULL; |
38651674 DA |
1736 | |
1737 | /* attempt to find a matching mode in the list of modes | |
1738 | * we have gotten so far, if not add a CVT mode that conforms | |
1739 | */ | |
1740 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1741 | goto create_mode; | |
1742 | ||
c683f427 | 1743 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1744 | again: |
0b4c0f3f | 1745 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1746 | /* check width/height */ |
1747 | if (mode->hdisplay != cmdline_mode->xres || | |
1748 | mode->vdisplay != cmdline_mode->yres) | |
1749 | continue; | |
1750 | ||
1751 | if (cmdline_mode->refresh_specified) { | |
1752 | if (mode->vrefresh != cmdline_mode->refresh) | |
1753 | continue; | |
1754 | } | |
1755 | ||
1756 | if (cmdline_mode->interlace) { | |
1757 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1758 | continue; | |
c683f427 TI |
1759 | } else if (prefer_non_interlace) { |
1760 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1761 | continue; | |
38651674 DA |
1762 | } |
1763 | return mode; | |
1764 | } | |
1765 | ||
c683f427 TI |
1766 | if (prefer_non_interlace) { |
1767 | prefer_non_interlace = false; | |
1768 | goto again; | |
1769 | } | |
1770 | ||
38651674 | 1771 | create_mode: |
1794d257 CW |
1772 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1773 | cmdline_mode); | |
0b4c0f3f | 1774 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1775 | return mode; |
1776 | } | |
2f1046f3 | 1777 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1778 | |
1779 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1780 | { | |
1781 | bool enable; | |
1782 | ||
96081cdf | 1783 | if (strict) |
38651674 | 1784 | enable = connector->status == connector_status_connected; |
96081cdf | 1785 | else |
38651674 | 1786 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1787 | |
38651674 DA |
1788 | return enable; |
1789 | } | |
1790 | ||
0b4c0f3f DA |
1791 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1792 | bool *enabled) | |
38651674 DA |
1793 | { |
1794 | bool any_enabled = false; | |
1795 | struct drm_connector *connector; | |
1796 | int i = 0; | |
1797 | ||
0b4c0f3f DA |
1798 | for (i = 0; i < fb_helper->connector_count; i++) { |
1799 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1800 | enabled[i] = drm_connector_enabled(connector, true); |
1801 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1802 | enabled[i] ? "yes" : "no"); | |
1803 | any_enabled |= enabled[i]; | |
38651674 DA |
1804 | } |
1805 | ||
1806 | if (any_enabled) | |
1807 | return; | |
1808 | ||
0b4c0f3f DA |
1809 | for (i = 0; i < fb_helper->connector_count; i++) { |
1810 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1811 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1812 | } |
1813 | } | |
1814 | ||
1d42bbc8 DA |
1815 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1816 | struct drm_display_mode **modes, | |
b0ee9e7f | 1817 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1818 | bool *enabled, int width, int height) |
1819 | { | |
1820 | int count, i, j; | |
1821 | bool can_clone = false; | |
1822 | struct drm_fb_helper_connector *fb_helper_conn; | |
1823 | struct drm_display_mode *dmt_mode, *mode; | |
1824 | ||
1825 | /* only contemplate cloning in the single crtc case */ | |
1826 | if (fb_helper->crtc_count > 1) | |
1827 | return false; | |
1828 | ||
1829 | count = 0; | |
1830 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1831 | if (enabled[i]) | |
1832 | count++; | |
1833 | } | |
1834 | ||
1835 | /* only contemplate cloning if more than one connector is enabled */ | |
1836 | if (count <= 1) | |
1837 | return false; | |
1838 | ||
1839 | /* check the command line or if nothing common pick 1024x768 */ | |
1840 | can_clone = true; | |
1841 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1842 | if (!enabled[i]) | |
1843 | continue; | |
1844 | fb_helper_conn = fb_helper->connector_info[i]; | |
1845 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1846 | if (!modes[i]) { | |
1847 | can_clone = false; | |
1848 | break; | |
1849 | } | |
1850 | for (j = 0; j < i; j++) { | |
1851 | if (!enabled[j]) | |
1852 | continue; | |
1853 | if (!drm_mode_equal(modes[j], modes[i])) | |
1854 | can_clone = false; | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | if (can_clone) { | |
1859 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1860 | return true; | |
1861 | } | |
1862 | ||
1863 | /* try and find a 1024x768 mode on each connector */ | |
1864 | can_clone = true; | |
f6e252ba | 1865 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1866 | |
1867 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1868 | ||
1869 | if (!enabled[i]) | |
1870 | continue; | |
1871 | ||
1872 | fb_helper_conn = fb_helper->connector_info[i]; | |
1873 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1874 | if (drm_mode_equal(mode, dmt_mode)) | |
1875 | modes[i] = mode; | |
1876 | } | |
1877 | if (!modes[i]) | |
1878 | can_clone = false; | |
1879 | } | |
1880 | ||
1881 | if (can_clone) { | |
1882 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1883 | return true; | |
1884 | } | |
1885 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1886 | return false; | |
1887 | } | |
1888 | ||
b0ee9e7f DA |
1889 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1890 | struct drm_display_mode **modes, | |
1891 | struct drm_fb_offset *offsets, | |
1892 | int idx, | |
1893 | int h_idx, int v_idx) | |
1894 | { | |
1895 | struct drm_fb_helper_connector *fb_helper_conn; | |
1896 | int i; | |
1897 | int hoffset = 0, voffset = 0; | |
1898 | ||
1899 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1900 | fb_helper_conn = fb_helper->connector_info[i]; | |
1901 | if (!fb_helper_conn->connector->has_tile) | |
1902 | continue; | |
1903 | ||
1904 | if (!modes[i] && (h_idx || v_idx)) { | |
1905 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
1906 | fb_helper_conn->connector->base.id); | |
1907 | continue; | |
1908 | } | |
1909 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
1910 | hoffset += modes[i]->hdisplay; | |
1911 | ||
1912 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
1913 | voffset += modes[i]->vdisplay; | |
1914 | } | |
1915 | offsets[idx].x = hoffset; | |
1916 | offsets[idx].y = voffset; | |
1917 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
1918 | return 0; | |
1919 | } | |
1920 | ||
0b4c0f3f | 1921 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 1922 | struct drm_display_mode **modes, |
b0ee9e7f | 1923 | struct drm_fb_offset *offsets, |
38651674 DA |
1924 | bool *enabled, int width, int height) |
1925 | { | |
0b4c0f3f DA |
1926 | struct drm_fb_helper_connector *fb_helper_conn; |
1927 | int i; | |
b0ee9e7f DA |
1928 | uint64_t conn_configured = 0, mask; |
1929 | int tile_pass = 0; | |
1930 | mask = (1 << fb_helper->connector_count) - 1; | |
1931 | retry: | |
0b4c0f3f DA |
1932 | for (i = 0; i < fb_helper->connector_count; i++) { |
1933 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1934 | |
b0ee9e7f DA |
1935 | if (conn_configured & (1 << i)) |
1936 | continue; | |
1937 | ||
1938 | if (enabled[i] == false) { | |
1939 | conn_configured |= (1 << i); | |
1940 | continue; | |
1941 | } | |
1942 | ||
1943 | /* first pass over all the untiled connectors */ | |
1944 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 1945 | continue; |
38651674 | 1946 | |
b0ee9e7f DA |
1947 | if (tile_pass == 1) { |
1948 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
1949 | fb_helper_conn->connector->tile_v_loc != 0) | |
1950 | continue; | |
1951 | ||
1952 | } else { | |
1953 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && | |
1954 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) | |
1955 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
1956 | continue; | |
1957 | ||
1958 | /* find the tile offsets for this pass - need | |
1959 | to find all tiles left and above */ | |
1960 | drm_get_tile_offsets(fb_helper, modes, offsets, | |
1961 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
1962 | } | |
38651674 | 1963 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 1964 | fb_helper_conn->connector->base.id); |
38651674 DA |
1965 | |
1966 | /* got for command line mode first */ | |
0b4c0f3f | 1967 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 | 1968 | if (!modes[i]) { |
b0ee9e7f DA |
1969 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
1970 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 1971 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
1972 | } |
1973 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1974 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1975 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1976 | break; |
1977 | } | |
1978 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1979 | "none"); | |
b0ee9e7f DA |
1980 | conn_configured |= (1 << i); |
1981 | } | |
1982 | ||
1983 | if ((conn_configured & mask) != mask) { | |
1984 | tile_pass++; | |
1985 | goto retry; | |
38651674 DA |
1986 | } |
1987 | return true; | |
1988 | } | |
1989 | ||
8be48d92 DA |
1990 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1991 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1992 | struct drm_display_mode **modes, |
1993 | int n, int width, int height) | |
1994 | { | |
1995 | int c, o; | |
1996 | struct drm_connector *connector; | |
be26a66d | 1997 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 1998 | struct drm_encoder *encoder; |
38651674 | 1999 | int my_score, best_score, score; |
8be48d92 | 2000 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 2001 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 2002 | |
0b4c0f3f | 2003 | if (n == fb_helper->connector_count) |
38651674 | 2004 | return 0; |
0b4c0f3f DA |
2005 | |
2006 | fb_helper_conn = fb_helper->connector_info[n]; | |
2007 | connector = fb_helper_conn->connector; | |
38651674 DA |
2008 | |
2009 | best_crtcs[n] = NULL; | |
8be48d92 | 2010 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
2011 | if (modes[n] == NULL) |
2012 | return best_score; | |
2013 | ||
255f0e7c | 2014 | crtcs = kzalloc(fb_helper->connector_count * |
8be48d92 | 2015 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
2016 | if (!crtcs) |
2017 | return best_score; | |
2018 | ||
2019 | my_score = 1; | |
2020 | if (connector->status == connector_status_connected) | |
2021 | my_score++; | |
0b4c0f3f | 2022 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 2023 | my_score++; |
0b4c0f3f | 2024 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
2025 | my_score++; |
2026 | ||
2027 | connector_funcs = connector->helper_private; | |
c61b93fe BB |
2028 | |
2029 | /* | |
2030 | * If the DRM device implements atomic hooks and ->best_encoder() is | |
2031 | * NULL we fallback to the default drm_atomic_helper_best_encoder() | |
2032 | * helper. | |
2033 | */ | |
2034 | if (fb_helper->dev->mode_config.funcs->atomic_commit && | |
2035 | !connector_funcs->best_encoder) | |
2036 | encoder = drm_atomic_helper_best_encoder(connector); | |
2037 | else | |
2038 | encoder = connector_funcs->best_encoder(connector); | |
2039 | ||
38651674 DA |
2040 | if (!encoder) |
2041 | goto out; | |
2042 | ||
38651674 DA |
2043 | /* select a crtc for this connector and then attempt to configure |
2044 | remaining connectors */ | |
8be48d92 DA |
2045 | for (c = 0; c < fb_helper->crtc_count; c++) { |
2046 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 2047 | |
96081cdf | 2048 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 2049 | continue; |
38651674 DA |
2050 | |
2051 | for (o = 0; o < n; o++) | |
2052 | if (best_crtcs[o] == crtc) | |
2053 | break; | |
2054 | ||
2055 | if (o < n) { | |
1d42bbc8 DA |
2056 | /* ignore cloning unless only a single crtc */ |
2057 | if (fb_helper->crtc_count > 1) | |
2058 | continue; | |
2059 | ||
2060 | if (!drm_mode_equal(modes[o], modes[n])) | |
2061 | continue; | |
38651674 DA |
2062 | } |
2063 | ||
2064 | crtcs[n] = crtc; | |
8be48d92 DA |
2065 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
2066 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
2067 | width, height); |
2068 | if (score > best_score) { | |
38651674 DA |
2069 | best_score = score; |
2070 | memcpy(best_crtcs, crtcs, | |
255f0e7c | 2071 | fb_helper->connector_count * |
8be48d92 | 2072 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 2073 | } |
38651674 DA |
2074 | } |
2075 | out: | |
2076 | kfree(crtcs); | |
2077 | return best_score; | |
2078 | } | |
2079 | ||
8be48d92 | 2080 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 2081 | { |
8be48d92 DA |
2082 | struct drm_device *dev = fb_helper->dev; |
2083 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 2084 | struct drm_display_mode **modes; |
b0ee9e7f | 2085 | struct drm_fb_offset *offsets; |
8be48d92 | 2086 | struct drm_mode_set *modeset; |
38651674 DA |
2087 | bool *enabled; |
2088 | int width, height; | |
11e17a08 | 2089 | int i; |
38651674 DA |
2090 | |
2091 | DRM_DEBUG_KMS("\n"); | |
2092 | ||
2093 | width = dev->mode_config.max_width; | |
2094 | height = dev->mode_config.max_height; | |
2095 | ||
383b2e57 | 2096 | crtcs = kcalloc(fb_helper->connector_count, |
8be48d92 | 2097 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
383b2e57 | 2098 | modes = kcalloc(fb_helper->connector_count, |
38651674 | 2099 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
383b2e57 | 2100 | offsets = kcalloc(fb_helper->connector_count, |
b0ee9e7f | 2101 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
383b2e57 | 2102 | enabled = kcalloc(fb_helper->connector_count, |
38651674 | 2103 | sizeof(bool), GFP_KERNEL); |
b0ee9e7f | 2104 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
2105 | DRM_ERROR("Memory allocation failed\n"); |
2106 | goto out; | |
2107 | } | |
2108 | ||
38651674 | 2109 | |
0b4c0f3f | 2110 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2111 | |
11e17a08 JB |
2112 | if (!(fb_helper->funcs->initial_config && |
2113 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2114 | offsets, |
11e17a08 | 2115 | enabled, width, height))) { |
383b2e57 ML |
2116 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
2117 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); | |
2118 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); | |
11e17a08 | 2119 | |
b0ee9e7f DA |
2120 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2121 | enabled, width, height) && | |
2122 | !drm_target_preferred(fb_helper, modes, offsets, | |
2123 | enabled, width, height)) | |
1d42bbc8 | 2124 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2125 | |
11e17a08 JB |
2126 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2127 | width, height); | |
38651674 | 2128 | |
11e17a08 JB |
2129 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2130 | } | |
8be48d92 DA |
2131 | |
2132 | /* need to set the modesets up here for use later */ | |
2133 | /* fill out the connector<->crtc mappings into the modesets */ | |
2134 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2135 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2136 | modeset->num_connectors = 0; | |
7e53f3a4 | 2137 | modeset->fb = NULL; |
8be48d92 | 2138 | } |
38651674 | 2139 | |
0b4c0f3f | 2140 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 2141 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2142 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2143 | struct drm_fb_offset *offset = &offsets[i]; |
8be48d92 | 2144 | modeset = &fb_crtc->mode_set; |
38651674 | 2145 | |
8be48d92 | 2146 | if (mode && fb_crtc) { |
b0ee9e7f DA |
2147 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2148 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
8be48d92 | 2149 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2150 | fb_crtc->x = offset->x; |
2151 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2152 | if (modeset->mode) |
2153 | drm_mode_destroy(dev, modeset->mode); | |
2154 | modeset->mode = drm_mode_duplicate(dev, | |
2155 | fb_crtc->desired_mode); | |
0b4c0f3f | 2156 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 2157 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2158 | modeset->x = offset->x; |
2159 | modeset->y = offset->y; | |
38651674 | 2160 | } |
38651674 DA |
2161 | } |
2162 | ||
7e53f3a4 DV |
2163 | /* Clear out any old modes if there are no more connected outputs. */ |
2164 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
2165 | modeset = &fb_helper->crtc_info[i].mode_set; | |
2166 | if (modeset->num_connectors == 0) { | |
2167 | BUG_ON(modeset->fb); | |
7e53f3a4 DV |
2168 | if (modeset->mode) |
2169 | drm_mode_destroy(dev, modeset->mode); | |
2170 | modeset->mode = NULL; | |
2171 | } | |
2172 | } | |
8c5eaca0 | 2173 | out: |
38651674 DA |
2174 | kfree(crtcs); |
2175 | kfree(modes); | |
b0ee9e7f | 2176 | kfree(offsets); |
38651674 DA |
2177 | kfree(enabled); |
2178 | } | |
2179 | ||
2180 | /** | |
207fd329 | 2181 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2182 | * @fb_helper: fb_helper device struct |
2183 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2184 | * |
d0ddc033 | 2185 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2186 | * At the moment, this is a cloned configuration across all heads with |
2187 | * a new framebuffer object as the backing store. | |
2188 | * | |
207fd329 DV |
2189 | * Note that this also registers the fbdev and so allows userspace to call into |
2190 | * the driver through the fbdev interfaces. | |
2191 | * | |
2192 | * This function will call down into the ->fb_probe callback to let | |
2193 | * the driver allocate and initialize the fbdev info structure and the drm | |
2194 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
2195 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
2196 | * values for the fbdev info structure. | |
2197 | * | |
40f8cf4b DV |
2198 | * HANG DEBUGGING: |
2199 | * | |
2200 | * When you have fbcon support built-in or already loaded, this function will do | |
2201 | * a full modeset to setup the fbdev console. Due to locking misdesign in the | |
2202 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding | |
2203 | * console_lock. Until console_unlock is called no dmesg lines will be sent out | |
2204 | * to consoles, not even serial console. This means when your driver crashes, | |
2205 | * you will see absolutely nothing else but a system stuck in this function, | |
2206 | * with no further output. Any kind of printk() you place within your own driver | |
2207 | * or in the drm core modeset code will also never show up. | |
2208 | * | |
2209 | * Standard debug practice is to run the fbcon setup without taking the | |
2210 | * console_lock as a hack, to be able to see backtraces and crashes on the | |
2211 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel | |
2212 | * cmdline option. | |
2213 | * | |
2214 | * The other option is to just disable fbdev emulation since very likely the | |
af509d38 L |
2215 | * first modeset from userspace will crash in the same way, and is even easier |
2216 | * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 | |
40f8cf4b DV |
2217 | * kernel cmdline option. |
2218 | * | |
38651674 DA |
2219 | * RETURNS: |
2220 | * Zero if everything went ok, nonzero otherwise. | |
2221 | */ | |
01934c2a | 2222 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2223 | { |
8be48d92 | 2224 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
2225 | int count = 0; |
2226 | ||
f64c5573 DV |
2227 | if (!drm_fbdev_emulation) |
2228 | return 0; | |
2229 | ||
53f1904b | 2230 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
2231 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
2232 | dev->mode_config.max_width, | |
2233 | dev->mode_config.max_height); | |
53f1904b | 2234 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
2235 | /* |
2236 | * we shouldn't end up with no modes here. | |
2237 | */ | |
96081cdf | 2238 | if (count == 0) |
d56b1b9d | 2239 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 2240 | |
8be48d92 | 2241 | drm_setup_crtcs(fb_helper); |
38651674 | 2242 | |
4abe3520 | 2243 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 2244 | } |
8be48d92 | 2245 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2246 | |
7394371d CW |
2247 | /** |
2248 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2249 | * probing all the outputs attached to the fb |
7394371d CW |
2250 | * @fb_helper: the drm_fb_helper |
2251 | * | |
7394371d | 2252 | * Scan the connectors attached to the fb_helper and try to put together a |
62cacc79 | 2253 | * setup after notification of a change in output configuration. |
7394371d | 2254 | * |
207fd329 DV |
2255 | * Called at runtime, takes the mode config locks to be able to check/change the |
2256 | * modeset configuration. Must be run from process context (which usually means | |
2257 | * either the output polling work or a work item launched from the driver's | |
2258 | * hotplug interrupt). | |
2259 | * | |
50c3dc97 | 2260 | * Note that drivers may call this even before calling |
af509d38 | 2261 | * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows |
50c3dc97 DV |
2262 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
2263 | * not miss any hotplug events. | |
207fd329 | 2264 | * |
7394371d CW |
2265 | * RETURNS: |
2266 | * 0 on success and a non-zero error code otherwise. | |
2267 | */ | |
2268 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2269 | { |
7394371d | 2270 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 2271 | u32 max_width, max_height; |
5c4426a7 | 2272 | |
f64c5573 DV |
2273 | if (!drm_fbdev_emulation) |
2274 | return 0; | |
2275 | ||
89ced125 | 2276 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
50c3dc97 | 2277 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2278 | fb_helper->delayed_hotplug = true; |
89ced125 | 2279 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 2280 | return 0; |
4abe3520 | 2281 | } |
eb1f8e4f | 2282 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2283 | |
eb1f8e4f DA |
2284 | max_width = fb_helper->fb->width; |
2285 | max_height = fb_helper->fb->height; | |
5c4426a7 | 2286 | |
51bbd276 | 2287 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
2288 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
2289 | ||
2290 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 2291 | drm_setup_crtcs(fb_helper); |
84849903 | 2292 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
2293 | drm_fb_helper_set_par(fb_helper->fbdev); |
2294 | ||
2295 | return 0; | |
5c4426a7 | 2296 | } |
eb1f8e4f | 2297 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2298 | |
6a108a14 | 2299 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2300 | * but the module doesn't depend on any fb console symbols. At least |
2301 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2302 | */ | |
70412cfa | 2303 | int __init drm_fb_helper_modinit(void) |
3ce05168 | 2304 | { |
70412cfa | 2305 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2306 | const char *name = "fbcon"; |
2307 | struct module *fbcon; | |
2308 | ||
2309 | mutex_lock(&module_mutex); | |
2310 | fbcon = find_module(name); | |
2311 | mutex_unlock(&module_mutex); | |
2312 | ||
2313 | if (!fbcon) | |
2314 | request_module_nowait(name); | |
70412cfa | 2315 | #endif |
3ce05168 DF |
2316 | return 0; |
2317 | } | |
70412cfa | 2318 | EXPORT_SYMBOL(drm_fb_helper_modinit); |