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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++) { | |
7dfcb36a VS |
134 | struct drm_fb_helper_connector *fb_helper_connector = |
135 | fb_helper->connector_info[i]; | |
136 | ||
137 | drm_connector_unreference(fb_helper_connector->connector); | |
138 | ||
139 | kfree(fb_helper_connector); | |
0b4c0f3f DA |
140 | fb_helper->connector_info[i] = NULL; |
141 | } | |
142 | fb_helper->connector_count = 0; | |
169faeca DV |
143 | mutex_unlock(&dev->mode_config.mutex); |
144 | ||
15fce29d | 145 | return ret; |
d50ba256 | 146 | } |
0b4c0f3f | 147 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 148 | |
65c2a89c DA |
149 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) |
150 | { | |
151 | struct drm_fb_helper_connector **temp; | |
152 | struct drm_fb_helper_connector *fb_helper_connector; | |
153 | ||
f64c5573 DV |
154 | if (!drm_fbdev_emulation) |
155 | return 0; | |
156 | ||
65c2a89c DA |
157 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
158 | if (fb_helper->connector_count + 1 > fb_helper->connector_info_alloc_count) { | |
14f476fa | 159 | temp = krealloc(fb_helper->connector_info, sizeof(struct drm_fb_helper_connector *) * (fb_helper->connector_count + 1), GFP_KERNEL); |
65c2a89c DA |
160 | if (!temp) |
161 | return -ENOMEM; | |
162 | ||
163 | fb_helper->connector_info_alloc_count = fb_helper->connector_count + 1; | |
164 | fb_helper->connector_info = temp; | |
165 | } | |
166 | ||
167 | ||
168 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
169 | if (!fb_helper_connector) | |
170 | return -ENOMEM; | |
171 | ||
6e86d58b | 172 | drm_connector_reference(connector); |
65c2a89c DA |
173 | fb_helper_connector->connector = connector; |
174 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
175 | return 0; | |
176 | } | |
177 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); | |
178 | ||
179 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, | |
180 | struct drm_connector *connector) | |
181 | { | |
182 | struct drm_fb_helper_connector *fb_helper_connector; | |
183 | int i, j; | |
184 | ||
f64c5573 DV |
185 | if (!drm_fbdev_emulation) |
186 | return 0; | |
187 | ||
65c2a89c DA |
188 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
189 | ||
190 | for (i = 0; i < fb_helper->connector_count; i++) { | |
191 | if (fb_helper->connector_info[i]->connector == connector) | |
192 | break; | |
193 | } | |
194 | ||
195 | if (i == fb_helper->connector_count) | |
196 | return -EINVAL; | |
197 | fb_helper_connector = fb_helper->connector_info[i]; | |
6e86d58b | 198 | drm_connector_unreference(fb_helper_connector->connector); |
65c2a89c DA |
199 | |
200 | for (j = i + 1; j < fb_helper->connector_count; j++) { | |
201 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; | |
202 | } | |
203 | fb_helper->connector_count--; | |
204 | kfree(fb_helper_connector); | |
2148f18f | 205 | |
65c2a89c DA |
206 | return 0; |
207 | } | |
208 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); | |
209 | ||
99231028 JW |
210 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
211 | { | |
212 | uint16_t *r_base, *g_base, *b_base; | |
213 | int i; | |
214 | ||
04c0c569 VS |
215 | if (helper->funcs->gamma_get == NULL) |
216 | return; | |
217 | ||
99231028 JW |
218 | r_base = crtc->gamma_store; |
219 | g_base = r_base + crtc->gamma_size; | |
220 | b_base = g_base + crtc->gamma_size; | |
221 | ||
222 | for (i = 0; i < crtc->gamma_size; i++) | |
223 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
224 | } | |
225 | ||
226 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
227 | { | |
228 | uint16_t *r_base, *g_base, *b_base; | |
229 | ||
ebe0f244 LP |
230 | if (crtc->funcs->gamma_set == NULL) |
231 | return; | |
232 | ||
99231028 JW |
233 | r_base = crtc->gamma_store; |
234 | g_base = r_base + crtc->gamma_size; | |
235 | b_base = g_base + crtc->gamma_size; | |
236 | ||
7ea77283 | 237 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); |
99231028 JW |
238 | } |
239 | ||
207fd329 DV |
240 | /** |
241 | * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter | |
242 | * @info: fbdev registered by the helper | |
243 | */ | |
1a7aba7f JB |
244 | int drm_fb_helper_debug_enter(struct fb_info *info) |
245 | { | |
246 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 247 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
248 | int i; |
249 | ||
1a7aba7f JB |
250 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
251 | for (i = 0; i < helper->crtc_count; i++) { | |
252 | struct drm_mode_set *mode_set = | |
253 | &helper->crtc_info[i].mode_set; | |
254 | ||
255 | if (!mode_set->crtc->enabled) | |
256 | continue; | |
257 | ||
258 | funcs = mode_set->crtc->helper_private; | |
1b99b724 SC |
259 | if (funcs->mode_set_base_atomic == NULL) |
260 | continue; | |
261 | ||
99231028 | 262 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
263 | funcs->mode_set_base_atomic(mode_set->crtc, |
264 | mode_set->fb, | |
265 | mode_set->x, | |
413d45d3 | 266 | mode_set->y, |
21c74a8e | 267 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
268 | } |
269 | } | |
270 | ||
271 | return 0; | |
272 | } | |
273 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
274 | ||
275 | /* Find the real fb for a given fb helper CRTC */ | |
276 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
277 | { | |
278 | struct drm_device *dev = crtc->dev; | |
279 | struct drm_crtc *c; | |
280 | ||
6295d607 | 281 | drm_for_each_crtc(c, dev) { |
1a7aba7f | 282 | if (crtc->base.id == c->base.id) |
f4510a27 | 283 | return c->primary->fb; |
1a7aba7f JB |
284 | } |
285 | ||
286 | return NULL; | |
287 | } | |
288 | ||
207fd329 DV |
289 | /** |
290 | * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave | |
291 | * @info: fbdev registered by the helper | |
292 | */ | |
1a7aba7f JB |
293 | int drm_fb_helper_debug_leave(struct fb_info *info) |
294 | { | |
295 | struct drm_fb_helper *helper = info->par; | |
296 | struct drm_crtc *crtc; | |
be26a66d | 297 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
298 | struct drm_framebuffer *fb; |
299 | int i; | |
300 | ||
301 | for (i = 0; i < helper->crtc_count; i++) { | |
302 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
303 | crtc = mode_set->crtc; | |
304 | funcs = crtc->helper_private; | |
305 | fb = drm_mode_config_fb(crtc); | |
306 | ||
307 | if (!crtc->enabled) | |
308 | continue; | |
309 | ||
310 | if (!fb) { | |
311 | DRM_ERROR("no fb to restore??\n"); | |
312 | continue; | |
313 | } | |
314 | ||
1b99b724 SC |
315 | if (funcs->mode_set_base_atomic == NULL) |
316 | continue; | |
317 | ||
99231028 | 318 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 319 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 320 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
321 | } |
322 | ||
323 | return 0; | |
324 | } | |
325 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
326 | ||
bbb1e524 RC |
327 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
328 | { | |
329 | struct drm_device *dev = fb_helper->dev; | |
330 | struct drm_plane *plane; | |
331 | struct drm_atomic_state *state; | |
332 | int i, ret; | |
f72c6b33 | 333 | unsigned plane_mask; |
bbb1e524 RC |
334 | |
335 | state = drm_atomic_state_alloc(dev); | |
336 | if (!state) | |
337 | return -ENOMEM; | |
338 | ||
339 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
340 | retry: | |
f72c6b33 | 341 | plane_mask = 0; |
bbb1e524 RC |
342 | drm_for_each_plane(plane, dev) { |
343 | struct drm_plane_state *plane_state; | |
344 | ||
345 | plane_state = drm_atomic_get_plane_state(state, plane); | |
346 | if (IS_ERR(plane_state)) { | |
347 | ret = PTR_ERR(plane_state); | |
348 | goto fail; | |
349 | } | |
350 | ||
31ad61e4 | 351 | plane_state->rotation = DRM_ROTATE_0; |
bbb1e524 | 352 | |
f72c6b33 ML |
353 | plane->old_fb = plane->fb; |
354 | plane_mask |= 1 << drm_plane_index(plane); | |
355 | ||
bbb1e524 RC |
356 | /* disable non-primary: */ |
357 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
358 | continue; | |
359 | ||
360 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
361 | if (ret != 0) | |
362 | goto fail; | |
363 | } | |
364 | ||
365 | for(i = 0; i < fb_helper->crtc_count; i++) { | |
366 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
367 | ||
368 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
369 | if (ret != 0) | |
370 | goto fail; | |
371 | } | |
372 | ||
373 | ret = drm_atomic_commit(state); | |
bbb1e524 RC |
374 | |
375 | fail: | |
f72c6b33 | 376 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
94284037 | 377 | |
bbb1e524 RC |
378 | if (ret == -EDEADLK) |
379 | goto backoff; | |
380 | ||
0853695c | 381 | drm_atomic_state_put(state); |
bbb1e524 RC |
382 | return ret; |
383 | ||
384 | backoff: | |
385 | drm_atomic_state_clear(state); | |
386 | drm_atomic_legacy_backoff(state); | |
387 | ||
388 | goto retry; | |
389 | } | |
390 | ||
b7bdf0a8 | 391 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 392 | { |
3858bc5d VS |
393 | struct drm_device *dev = fb_helper->dev; |
394 | struct drm_plane *plane; | |
3858bc5d VS |
395 | int i; |
396 | ||
397 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 398 | |
d3a46183 | 399 | if (dev->mode_config.funcs->atomic_commit) |
bbb1e524 RC |
400 | return restore_fbdev_mode_atomic(fb_helper); |
401 | ||
6295d607 | 402 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
403 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
404 | drm_plane_force_disable(plane); | |
6aed8ec3 | 405 | |
6686df8c | 406 | if (plane->rotation_property) |
d138dd3c VS |
407 | drm_mode_plane_set_obj_prop(plane, |
408 | plane->rotation_property, | |
409 | DRM_ROTATE_0); | |
9783de20 SJ |
410 | } |
411 | ||
e8e7a2b8 DA |
412 | for (i = 0; i < fb_helper->crtc_count; i++) { |
413 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
414 | struct drm_crtc *crtc = mode_set->crtc; |
415 | int ret; | |
416 | ||
03f9abb2 AD |
417 | if (crtc->funcs->cursor_set2) { |
418 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
419 | if (ret) | |
48f87dd1 | 420 | return ret; |
03f9abb2 | 421 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
422 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
423 | if (ret) | |
b7bdf0a8 | 424 | return ret; |
3858bc5d VS |
425 | } |
426 | ||
2d13b679 | 427 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 428 | if (ret) |
b7bdf0a8 | 429 | return ret; |
e8e7a2b8 | 430 | } |
b7bdf0a8 DV |
431 | |
432 | return 0; | |
e8e7a2b8 | 433 | } |
5ea1f752 RC |
434 | |
435 | /** | |
436 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
437 | * @fb_helper: fbcon to restore | |
438 | * | |
439 | * This should be called from driver's drm ->lastclose callback | |
440 | * when implementing an fbcon on top of kms using this helper. This ensures that | |
441 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
442 | * |
443 | * RETURNS: | |
444 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 445 | */ |
b7bdf0a8 | 446 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
447 | { |
448 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
449 | bool do_delayed; |
450 | int ret; | |
e2809c7d | 451 | |
f64c5573 DV |
452 | if (!drm_fbdev_emulation) |
453 | return -ENODEV; | |
454 | ||
5ea1f752 RC |
455 | drm_modeset_lock_all(dev); |
456 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
457 | |
458 | do_delayed = fb_helper->delayed_hotplug; | |
459 | if (do_delayed) | |
460 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 461 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
462 | |
463 | if (do_delayed) | |
464 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
465 | return ret; |
466 | } | |
467 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 468 | |
2c4124fd GU |
469 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
470 | { | |
471 | struct drm_device *dev = fb_helper->dev; | |
472 | struct drm_crtc *crtc; | |
473 | int bound = 0, crtcs_bound = 0; | |
474 | ||
475 | /* Sometimes user space wants everything disabled, so don't steal the | |
476 | * display if there's a master. */ | |
f17b3ea3 | 477 | if (READ_ONCE(dev->master)) |
2c4124fd GU |
478 | return false; |
479 | ||
480 | drm_for_each_crtc(crtc, dev) { | |
481 | if (crtc->primary->fb) | |
482 | crtcs_bound++; | |
483 | if (crtc->primary->fb == fb_helper->fb) | |
484 | bound++; | |
485 | } | |
486 | ||
487 | if (bound < crtcs_bound) | |
488 | return false; | |
489 | ||
490 | return true; | |
491 | } | |
492 | ||
493 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
494 | /* |
495 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
496 | * and panic handling. | |
497 | */ | |
78b9c353 | 498 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 499 | { |
785b93ef DA |
500 | bool ret, error = false; |
501 | struct drm_fb_helper *helper; | |
502 | ||
503 | if (list_empty(&kernel_fb_helper_list)) | |
504 | return false; | |
505 | ||
506 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
507 | struct drm_device *dev = helper->dev; |
508 | ||
509 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
510 | continue; | |
511 | ||
dd908c86 | 512 | drm_modeset_lock_all(dev); |
3d9e35a9 | 513 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
514 | if (ret) |
515 | error = true; | |
cb597bb3 | 516 | drm_modeset_unlock_all(dev); |
785b93ef DA |
517 | } |
518 | return error; | |
519 | } | |
520 | ||
785b93ef DA |
521 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
522 | { | |
d21bf469 DV |
523 | bool ret; |
524 | ret = drm_fb_helper_force_kernel_mode(); | |
525 | if (ret == true) | |
526 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
527 | } |
528 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
529 | ||
1495cc9d | 530 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
531 | { |
532 | schedule_work(&drm_fb_helper_restore_work); | |
533 | } | |
534 | ||
535 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
536 | .handler = drm_fb_helper_sysrq, | |
537 | .help_msg = "force-fb(V)", | |
538 | .action_msg = "Restore framebuffer console", | |
539 | }; | |
b8c40d62 RD |
540 | #else |
541 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 542 | #endif |
785b93ef | 543 | |
3a8148c5 | 544 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
545 | { |
546 | struct drm_fb_helper *fb_helper = info->par; | |
547 | struct drm_device *dev = fb_helper->dev; | |
548 | struct drm_crtc *crtc; | |
023eb571 | 549 | struct drm_connector *connector; |
023eb571 | 550 | int i, j; |
785b93ef DA |
551 | |
552 | /* | |
3a8148c5 | 553 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 554 | */ |
84849903 | 555 | drm_modeset_lock_all(dev); |
20c60c35 DV |
556 | if (!drm_fb_helper_is_bound(fb_helper)) { |
557 | drm_modeset_unlock_all(dev); | |
558 | return; | |
559 | } | |
560 | ||
e87b2c42 | 561 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 562 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 563 | |
8be48d92 DA |
564 | if (!crtc->enabled) |
565 | continue; | |
566 | ||
3a8148c5 | 567 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
568 | for (j = 0; j < fb_helper->connector_count; j++) { |
569 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 570 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 571 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 572 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 573 | } |
785b93ef | 574 | } |
84849903 | 575 | drm_modeset_unlock_all(dev); |
785b93ef DA |
576 | } |
577 | ||
207fd329 DV |
578 | /** |
579 | * drm_fb_helper_blank - implementation for ->fb_blank | |
580 | * @blank: desired blanking state | |
581 | * @info: fbdev registered by the helper | |
582 | */ | |
785b93ef DA |
583 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
584 | { | |
c50bfd08 DV |
585 | if (oops_in_progress) |
586 | return -EBUSY; | |
587 | ||
785b93ef | 588 | switch (blank) { |
731b5a15 | 589 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 590 | case FB_BLANK_UNBLANK: |
3a8148c5 | 591 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 592 | break; |
731b5a15 | 593 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 594 | case FB_BLANK_NORMAL: |
3a8148c5 | 595 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 596 | break; |
731b5a15 | 597 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 598 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 599 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 600 | break; |
731b5a15 | 601 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 602 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 603 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 604 | break; |
731b5a15 | 605 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 606 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 607 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
608 | break; |
609 | } | |
610 | return 0; | |
611 | } | |
612 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
613 | ||
a2889606 VS |
614 | static void drm_fb_helper_modeset_release(struct drm_fb_helper *helper, |
615 | struct drm_mode_set *modeset) | |
616 | { | |
617 | int i; | |
618 | ||
619 | for (i = 0; i < modeset->num_connectors; i++) { | |
620 | drm_connector_unreference(modeset->connectors[i]); | |
621 | modeset->connectors[i] = NULL; | |
622 | } | |
623 | modeset->num_connectors = 0; | |
624 | ||
625 | drm_mode_destroy(helper->dev, modeset->mode); | |
626 | modeset->mode = NULL; | |
627 | ||
628 | /* FIXME should hold a ref? */ | |
629 | modeset->fb = NULL; | |
630 | } | |
631 | ||
785b93ef DA |
632 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) |
633 | { | |
634 | int i; | |
635 | ||
6e86d58b DA |
636 | for (i = 0; i < helper->connector_count; i++) { |
637 | drm_connector_unreference(helper->connector_info[i]->connector); | |
0b4c0f3f | 638 | kfree(helper->connector_info[i]); |
6e86d58b | 639 | } |
0b4c0f3f | 640 | kfree(helper->connector_info); |
a2889606 | 641 | |
a1b7736d | 642 | for (i = 0; i < helper->crtc_count; i++) { |
a2889606 VS |
643 | struct drm_mode_set *modeset = &helper->crtc_info[i].mode_set; |
644 | ||
645 | drm_fb_helper_modeset_release(helper, modeset); | |
646 | kfree(modeset->connectors); | |
a1b7736d | 647 | } |
785b93ef DA |
648 | kfree(helper->crtc_info); |
649 | } | |
650 | ||
cfe63423 NT |
651 | static void drm_fb_helper_resume_worker(struct work_struct *work) |
652 | { | |
653 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
654 | resume_work); | |
655 | ||
656 | console_lock(); | |
657 | fb_set_suspend(helper->fbdev, 0); | |
658 | console_unlock(); | |
659 | } | |
660 | ||
eaa434de NT |
661 | static void drm_fb_helper_dirty_work(struct work_struct *work) |
662 | { | |
663 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
664 | dirty_work); | |
665 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
666 | struct drm_clip_rect clip_copy; | |
667 | unsigned long flags; | |
668 | ||
669 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
670 | clip_copy = *clip; | |
671 | clip->x1 = clip->y1 = ~0; | |
672 | clip->x2 = clip->y2 = 0; | |
673 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
674 | ||
87d3b658 TI |
675 | /* call dirty callback only when it has been really touched */ |
676 | if (clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2) | |
677 | helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); | |
eaa434de NT |
678 | } |
679 | ||
10a23102 TR |
680 | /** |
681 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
682 | * @dev: DRM device | |
683 | * @helper: driver-allocated fbdev helper structure to set up | |
684 | * @funcs: pointer to structure of functions associate with this helper | |
685 | * | |
686 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
687 | * useful to implement race-free initialization of the polling helpers. | |
688 | */ | |
689 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
690 | const struct drm_fb_helper_funcs *funcs) | |
691 | { | |
692 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
eaa434de | 693 | spin_lock_init(&helper->dirty_lock); |
cfe63423 | 694 | INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker); |
eaa434de NT |
695 | INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work); |
696 | helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0; | |
10a23102 TR |
697 | helper->funcs = funcs; |
698 | helper->dev = dev; | |
699 | } | |
700 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
701 | ||
207fd329 DV |
702 | /** |
703 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
704 | * @dev: drm device | |
705 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
706 | * @crtc_count: maximum number of crtcs to support in this fbdev emulation | |
707 | * @max_conn_count: max connector count | |
708 | * | |
709 | * This allocates the structures for the fbdev helper with the given limits. | |
710 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
711 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
712 | * to allow driver writes more control over the exact init sequence. | |
713 | * | |
10a23102 | 714 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
715 | * |
716 | * RETURNS: | |
717 | * Zero if everything went ok, nonzero otherwise. | |
718 | */ | |
4abe3520 DA |
719 | int drm_fb_helper_init(struct drm_device *dev, |
720 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 721 | int crtc_count, int max_conn_count) |
785b93ef | 722 | { |
785b93ef | 723 | struct drm_crtc *crtc; |
785b93ef DA |
724 | int i; |
725 | ||
f64c5573 DV |
726 | if (!drm_fbdev_emulation) |
727 | return 0; | |
728 | ||
04cfe97e XL |
729 | if (!max_conn_count) |
730 | return -EINVAL; | |
731 | ||
4abe3520 DA |
732 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
733 | if (!fb_helper->crtc_info) | |
785b93ef DA |
734 | return -ENOMEM; |
735 | ||
4abe3520 DA |
736 | fb_helper->crtc_count = crtc_count; |
737 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
738 | if (!fb_helper->connector_info) { | |
739 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
740 | return -ENOMEM; |
741 | } | |
65c2a89c | 742 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 743 | fb_helper->connector_count = 0; |
785b93ef DA |
744 | |
745 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 746 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
747 | kcalloc(max_conn_count, |
748 | sizeof(struct drm_connector *), | |
749 | GFP_KERNEL); | |
750 | ||
4a1b0714 | 751 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 752 | goto out_free; |
4abe3520 | 753 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
754 | } |
755 | ||
756 | i = 0; | |
6295d607 | 757 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 758 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
759 | i++; |
760 | } | |
e9ad3181 | 761 | |
785b93ef DA |
762 | return 0; |
763 | out_free: | |
4abe3520 | 764 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
765 | return -ENOMEM; |
766 | } | |
4abe3520 DA |
767 | EXPORT_SYMBOL(drm_fb_helper_init); |
768 | ||
b8017d6c AT |
769 | /** |
770 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
771 | * @fb_helper: driver-allocated fbdev helper | |
772 | * | |
773 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
774 | * by the driver within the fb_probe fb_helper callback function. | |
775 | * | |
776 | * RETURNS: | |
777 | * fb_info pointer if things went okay, pointer containing error code | |
778 | * otherwise | |
779 | */ | |
780 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
781 | { | |
782 | struct device *dev = fb_helper->dev->dev; | |
783 | struct fb_info *info; | |
784 | int ret; | |
785 | ||
786 | info = framebuffer_alloc(0, dev); | |
787 | if (!info) | |
788 | return ERR_PTR(-ENOMEM); | |
789 | ||
790 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
791 | if (ret) | |
792 | goto err_release; | |
793 | ||
794 | info->apertures = alloc_apertures(1); | |
795 | if (!info->apertures) { | |
796 | ret = -ENOMEM; | |
797 | goto err_free_cmap; | |
798 | } | |
799 | ||
800 | fb_helper->fbdev = info; | |
801 | ||
802 | return info; | |
803 | ||
804 | err_free_cmap: | |
805 | fb_dealloc_cmap(&info->cmap); | |
806 | err_release: | |
807 | framebuffer_release(info); | |
808 | return ERR_PTR(ret); | |
809 | } | |
810 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
811 | ||
812 | /** | |
813 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
814 | * @fb_helper: driver-allocated fbdev helper | |
815 | * | |
816 | * A wrapper around unregister_framebuffer, to release the fb_info | |
817 | * framebuffer device | |
818 | */ | |
819 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
820 | { | |
821 | if (fb_helper && fb_helper->fbdev) | |
822 | unregister_framebuffer(fb_helper->fbdev); | |
823 | } | |
824 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
825 | ||
826 | /** | |
827 | * drm_fb_helper_release_fbi - dealloc fb_info and its members | |
828 | * @fb_helper: driver-allocated fbdev helper | |
829 | * | |
830 | * A helper to free memory taken by fb_info and the members cmap and | |
831 | * apertures | |
832 | */ | |
833 | void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) | |
834 | { | |
835 | if (fb_helper) { | |
836 | struct fb_info *info = fb_helper->fbdev; | |
837 | ||
838 | if (info) { | |
839 | if (info->cmap.len) | |
840 | fb_dealloc_cmap(&info->cmap); | |
841 | framebuffer_release(info); | |
842 | } | |
843 | ||
844 | fb_helper->fbdev = NULL; | |
845 | } | |
846 | } | |
847 | EXPORT_SYMBOL(drm_fb_helper_release_fbi); | |
848 | ||
4abe3520 DA |
849 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
850 | { | |
f64c5573 DV |
851 | if (!drm_fbdev_emulation) |
852 | return; | |
853 | ||
4abe3520 DA |
854 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
855 | list_del(&fb_helper->kernel_fb_list); | |
856 | if (list_empty(&kernel_fb_helper_list)) { | |
4abe3520 DA |
857 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
858 | } | |
859 | } | |
860 | ||
861 | drm_fb_helper_crtc_free(fb_helper); | |
862 | ||
4abe3520 DA |
863 | } |
864 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 865 | |
47074ab7 AT |
866 | /** |
867 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
868 | * @fb_helper: driver-allocated fbdev helper | |
869 | * | |
870 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
871 | */ | |
872 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
873 | { | |
874 | if (fb_helper && fb_helper->fbdev) | |
875 | unlink_framebuffer(fb_helper->fbdev); | |
876 | } | |
877 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
878 | ||
eaa434de NT |
879 | static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y, |
880 | u32 width, u32 height) | |
881 | { | |
882 | struct drm_fb_helper *helper = info->par; | |
883 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
884 | unsigned long flags; | |
885 | ||
886 | if (!helper->fb->funcs->dirty) | |
887 | return; | |
888 | ||
889 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
890 | clip->x1 = min_t(u32, clip->x1, x); | |
891 | clip->y1 = min_t(u32, clip->y1, y); | |
892 | clip->x2 = max_t(u32, clip->x2, x + width); | |
893 | clip->y2 = max_t(u32, clip->y2, y + height); | |
894 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
895 | ||
896 | schedule_work(&helper->dirty_work); | |
897 | } | |
898 | ||
899 | /** | |
900 | * drm_fb_helper_deferred_io() - fbdev deferred_io callback function | |
901 | * @info: fb_info struct pointer | |
902 | * @pagelist: list of dirty mmap framebuffer pages | |
903 | * | |
904 | * This function is used as the &fb_deferred_io ->deferred_io | |
905 | * callback function for flushing the fbdev mmap writes. | |
906 | */ | |
907 | void drm_fb_helper_deferred_io(struct fb_info *info, | |
908 | struct list_head *pagelist) | |
909 | { | |
910 | unsigned long start, end, min, max; | |
911 | struct page *page; | |
912 | u32 y1, y2; | |
913 | ||
914 | min = ULONG_MAX; | |
915 | max = 0; | |
916 | list_for_each_entry(page, pagelist, lru) { | |
917 | start = page->index << PAGE_SHIFT; | |
918 | end = start + PAGE_SIZE - 1; | |
919 | min = min(min, start); | |
920 | max = max(max, end); | |
921 | } | |
922 | ||
923 | if (min < max) { | |
924 | y1 = min / info->fix.line_length; | |
925 | y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length), | |
926 | info->var.yres); | |
927 | drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1); | |
928 | } | |
929 | } | |
930 | EXPORT_SYMBOL(drm_fb_helper_deferred_io); | |
931 | ||
cbb1a82e AT |
932 | /** |
933 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
934 | * @info: fb_info struct pointer | |
935 | * @buf: userspace buffer to read from framebuffer memory | |
936 | * @count: number of bytes to read from framebuffer memory | |
937 | * @ppos: read offset within framebuffer memory | |
938 | * | |
939 | * A wrapper around fb_sys_read implemented by fbdev core | |
940 | */ | |
941 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
942 | size_t count, loff_t *ppos) | |
943 | { | |
944 | return fb_sys_read(info, buf, count, ppos); | |
945 | } | |
946 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
947 | ||
948 | /** | |
949 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
950 | * @info: fb_info struct pointer | |
951 | * @buf: userspace buffer to write to framebuffer memory | |
952 | * @count: number of bytes to write to framebuffer memory | |
953 | * @ppos: write offset within framebuffer memory | |
954 | * | |
955 | * A wrapper around fb_sys_write implemented by fbdev core | |
956 | */ | |
957 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
958 | size_t count, loff_t *ppos) | |
959 | { | |
eaa434de NT |
960 | ssize_t ret; |
961 | ||
962 | ret = fb_sys_write(info, buf, count, ppos); | |
963 | if (ret > 0) | |
964 | drm_fb_helper_dirty(info, 0, 0, info->var.xres, | |
965 | info->var.yres); | |
966 | ||
967 | return ret; | |
cbb1a82e AT |
968 | } |
969 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
970 | ||
742547b7 AT |
971 | /** |
972 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
973 | * @info: fbdev registered by the helper | |
974 | * @rect: info about rectangle to fill | |
975 | * | |
976 | * A wrapper around sys_fillrect implemented by fbdev core | |
977 | */ | |
978 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
979 | const struct fb_fillrect *rect) | |
980 | { | |
981 | sys_fillrect(info, rect); | |
eaa434de NT |
982 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
983 | rect->width, rect->height); | |
742547b7 AT |
984 | } |
985 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
986 | ||
987 | /** | |
988 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
989 | * @info: fbdev registered by the helper | |
990 | * @area: info about area to copy | |
991 | * | |
992 | * A wrapper around sys_copyarea implemented by fbdev core | |
993 | */ | |
994 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
995 | const struct fb_copyarea *area) | |
996 | { | |
997 | sys_copyarea(info, area); | |
eaa434de NT |
998 | drm_fb_helper_dirty(info, area->dx, area->dy, |
999 | area->width, area->height); | |
742547b7 AT |
1000 | } |
1001 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
1002 | ||
1003 | /** | |
1004 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
1005 | * @info: fbdev registered by the helper | |
1006 | * @image: info about image to blit | |
1007 | * | |
1008 | * A wrapper around sys_imageblit implemented by fbdev core | |
1009 | */ | |
1010 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
1011 | const struct fb_image *image) | |
1012 | { | |
1013 | sys_imageblit(info, image); | |
eaa434de NT |
1014 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1015 | image->width, image->height); | |
742547b7 AT |
1016 | } |
1017 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
1018 | ||
1019 | /** | |
1020 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
1021 | * @info: fbdev registered by the helper | |
1022 | * @rect: info about rectangle to fill | |
1023 | * | |
1024 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1025 | */ | |
1026 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
1027 | const struct fb_fillrect *rect) | |
1028 | { | |
1029 | cfb_fillrect(info, rect); | |
eaa434de NT |
1030 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
1031 | rect->width, rect->height); | |
742547b7 AT |
1032 | } |
1033 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
1034 | ||
1035 | /** | |
1036 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
1037 | * @info: fbdev registered by the helper | |
1038 | * @area: info about area to copy | |
1039 | * | |
1040 | * A wrapper around cfb_copyarea implemented by fbdev core | |
1041 | */ | |
1042 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
1043 | const struct fb_copyarea *area) | |
1044 | { | |
1045 | cfb_copyarea(info, area); | |
eaa434de NT |
1046 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1047 | area->width, area->height); | |
742547b7 AT |
1048 | } |
1049 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
1050 | ||
1051 | /** | |
1052 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
1053 | * @info: fbdev registered by the helper | |
1054 | * @image: info about image to blit | |
1055 | * | |
1056 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1057 | */ | |
1058 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
1059 | const struct fb_image *image) | |
1060 | { | |
1061 | cfb_imageblit(info, image); | |
eaa434de NT |
1062 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1063 | image->width, image->height); | |
742547b7 AT |
1064 | } |
1065 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
1066 | ||
fdefa58a AT |
1067 | /** |
1068 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
1069 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1070 | * @suspend: whether to suspend or resume |
fdefa58a | 1071 | * |
cfe63423 NT |
1072 | * A wrapper around fb_set_suspend implemented by fbdev core. |
1073 | * Use drm_fb_helper_set_suspend_unlocked() if you don't need to take | |
1074 | * the lock yourself | |
fdefa58a | 1075 | */ |
28579f37 | 1076 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend) |
fdefa58a AT |
1077 | { |
1078 | if (fb_helper && fb_helper->fbdev) | |
28579f37 | 1079 | fb_set_suspend(fb_helper->fbdev, suspend); |
fdefa58a AT |
1080 | } |
1081 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
1082 | ||
cfe63423 NT |
1083 | /** |
1084 | * drm_fb_helper_set_suspend_unlocked - wrapper around fb_set_suspend that also | |
1085 | * takes the console lock | |
1086 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1087 | * @suspend: whether to suspend or resume |
cfe63423 NT |
1088 | * |
1089 | * A wrapper around fb_set_suspend() that takes the console lock. If the lock | |
1090 | * isn't available on resume, a worker is tasked with waiting for the lock | |
1091 | * to become available. The console lock can be pretty contented on resume | |
1092 | * due to all the printk activity. | |
1093 | * | |
1094 | * This function can be called multiple times with the same state since | |
1095 | * &fb_info->state is checked to see if fbdev is running or not before locking. | |
1096 | * | |
1097 | * Use drm_fb_helper_set_suspend() if you need to take the lock yourself. | |
1098 | */ | |
1099 | void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, | |
28579f37 | 1100 | bool suspend) |
cfe63423 NT |
1101 | { |
1102 | if (!fb_helper || !fb_helper->fbdev) | |
1103 | return; | |
1104 | ||
1105 | /* make sure there's no pending/ongoing resume */ | |
1106 | flush_work(&fb_helper->resume_work); | |
1107 | ||
1108 | if (suspend) { | |
1109 | if (fb_helper->fbdev->state != FBINFO_STATE_RUNNING) | |
1110 | return; | |
1111 | ||
1112 | console_lock(); | |
1113 | ||
1114 | } else { | |
1115 | if (fb_helper->fbdev->state == FBINFO_STATE_RUNNING) | |
1116 | return; | |
1117 | ||
1118 | if (!console_trylock()) { | |
1119 | schedule_work(&fb_helper->resume_work); | |
1120 | return; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | fb_set_suspend(fb_helper->fbdev, suspend); | |
1125 | console_unlock(); | |
1126 | } | |
1127 | EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked); | |
1128 | ||
c850cb78 | 1129 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
1130 | u16 blue, u16 regno, struct fb_info *info) |
1131 | { | |
1132 | struct drm_fb_helper *fb_helper = info->par; | |
1133 | struct drm_framebuffer *fb = fb_helper->fb; | |
b8c00ac5 | 1134 | |
c850cb78 DA |
1135 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
1136 | u32 *palette; | |
1137 | u32 value; | |
1138 | /* place color in psuedopalette */ | |
1139 | if (regno > 16) | |
1140 | return -EINVAL; | |
1141 | palette = (u32 *)info->pseudo_palette; | |
1142 | red >>= (16 - info->var.red.length); | |
1143 | green >>= (16 - info->var.green.length); | |
1144 | blue >>= (16 - info->var.blue.length); | |
1145 | value = (red << info->var.red.offset) | | |
1146 | (green << info->var.green.offset) | | |
1147 | (blue << info->var.blue.offset); | |
9da12b6a RC |
1148 | if (info->var.transp.length > 0) { |
1149 | u32 mask = (1 << info->var.transp.length) - 1; | |
1150 | mask <<= info->var.transp.offset; | |
1151 | value |= mask; | |
1152 | } | |
c850cb78 DA |
1153 | palette[regno] = value; |
1154 | return 0; | |
1155 | } | |
1156 | ||
04c0c569 VS |
1157 | /* |
1158 | * The driver really shouldn't advertise pseudo/directcolor | |
1159 | * visuals if it can't deal with the palette. | |
1160 | */ | |
1161 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1162 | !fb_helper->funcs->gamma_get)) | |
1163 | return -EINVAL; | |
1164 | ||
fef1480d | 1165 | WARN_ON(fb->bits_per_pixel != 8); |
b8c00ac5 | 1166 | |
fef1480d | 1167 | fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); |
b8c00ac5 | 1168 | |
c850cb78 | 1169 | return 0; |
b8c00ac5 DA |
1170 | } |
1171 | ||
207fd329 DV |
1172 | /** |
1173 | * drm_fb_helper_setcmap - implementation for ->fb_setcmap | |
1174 | * @cmap: cmap to set | |
1175 | * @info: fbdev registered by the helper | |
1176 | */ | |
068143d3 DA |
1177 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1178 | { | |
1179 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1180 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1181 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1182 | u16 *red, *green, *blue, *transp; |
1183 | struct drm_crtc *crtc; | |
062ac622 | 1184 | int i, j, rc = 0; |
068143d3 DA |
1185 | int start; |
1186 | ||
c50bfd08 | 1187 | if (oops_in_progress) |
9aa609e1 | 1188 | return -EBUSY; |
c50bfd08 DV |
1189 | |
1190 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1191 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1192 | drm_modeset_unlock_all(dev); | |
1193 | return -EBUSY; | |
1194 | } | |
1195 | ||
8be48d92 DA |
1196 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1197 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1198 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1199 | |
1200 | red = cmap->red; | |
1201 | green = cmap->green; | |
1202 | blue = cmap->blue; | |
1203 | transp = cmap->transp; | |
1204 | start = cmap->start; | |
1205 | ||
062ac622 | 1206 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1207 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1208 | ||
1209 | hred = *red++; | |
1210 | hgreen = *green++; | |
1211 | hblue = *blue++; | |
1212 | ||
1213 | if (transp) | |
1214 | htransp = *transp++; | |
1215 | ||
c850cb78 DA |
1216 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1217 | if (rc) | |
8391a3d5 | 1218 | goto out; |
068143d3 | 1219 | } |
04c0c569 VS |
1220 | if (crtc_funcs->load_lut) |
1221 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1222 | } |
8391a3d5 VS |
1223 | out: |
1224 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1225 | return rc; |
1226 | } | |
1227 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1228 | ||
207fd329 DV |
1229 | /** |
1230 | * drm_fb_helper_check_var - implementation for ->fb_check_var | |
1231 | * @var: screeninfo to check | |
1232 | * @info: fbdev registered by the helper | |
1233 | */ | |
785b93ef DA |
1234 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1235 | struct fb_info *info) | |
1236 | { | |
1237 | struct drm_fb_helper *fb_helper = info->par; | |
1238 | struct drm_framebuffer *fb = fb_helper->fb; | |
1239 | int depth; | |
1240 | ||
f90ebd9e | 1241 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1242 | return -EINVAL; |
1243 | ||
865afb11 SA |
1244 | /* |
1245 | * Changes struct fb_var_screeninfo are currently not pushed back | |
1246 | * to KMS, hence fail if different settings are requested. | |
1247 | */ | |
1248 | if (var->bits_per_pixel != fb->bits_per_pixel || | |
1249 | var->xres != fb->width || var->yres != fb->height || | |
1250 | var->xres_virtual != fb->width || var->yres_virtual != fb->height) { | |
1251 | DRM_DEBUG("fb userspace requested width/height/bpp different than current fb " | |
62fb376e CW |
1252 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1253 | var->xres, var->yres, var->bits_per_pixel, | |
1254 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 1255 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
1256 | return -EINVAL; |
1257 | } | |
1258 | ||
1259 | switch (var->bits_per_pixel) { | |
1260 | case 16: | |
1261 | depth = (var->green.length == 6) ? 16 : 15; | |
1262 | break; | |
1263 | case 32: | |
1264 | depth = (var->transp.length > 0) ? 32 : 24; | |
1265 | break; | |
1266 | default: | |
1267 | depth = var->bits_per_pixel; | |
1268 | break; | |
1269 | } | |
1270 | ||
1271 | switch (depth) { | |
1272 | case 8: | |
1273 | var->red.offset = 0; | |
1274 | var->green.offset = 0; | |
1275 | var->blue.offset = 0; | |
1276 | var->red.length = 8; | |
1277 | var->green.length = 8; | |
1278 | var->blue.length = 8; | |
1279 | var->transp.length = 0; | |
1280 | var->transp.offset = 0; | |
1281 | break; | |
1282 | case 15: | |
1283 | var->red.offset = 10; | |
1284 | var->green.offset = 5; | |
1285 | var->blue.offset = 0; | |
1286 | var->red.length = 5; | |
1287 | var->green.length = 5; | |
1288 | var->blue.length = 5; | |
1289 | var->transp.length = 1; | |
1290 | var->transp.offset = 15; | |
1291 | break; | |
1292 | case 16: | |
1293 | var->red.offset = 11; | |
1294 | var->green.offset = 5; | |
1295 | var->blue.offset = 0; | |
1296 | var->red.length = 5; | |
1297 | var->green.length = 6; | |
1298 | var->blue.length = 5; | |
1299 | var->transp.length = 0; | |
1300 | var->transp.offset = 0; | |
1301 | break; | |
1302 | case 24: | |
1303 | var->red.offset = 16; | |
1304 | var->green.offset = 8; | |
1305 | var->blue.offset = 0; | |
1306 | var->red.length = 8; | |
1307 | var->green.length = 8; | |
1308 | var->blue.length = 8; | |
1309 | var->transp.length = 0; | |
1310 | var->transp.offset = 0; | |
1311 | break; | |
1312 | case 32: | |
1313 | var->red.offset = 16; | |
1314 | var->green.offset = 8; | |
1315 | var->blue.offset = 0; | |
1316 | var->red.length = 8; | |
1317 | var->green.length = 8; | |
1318 | var->blue.length = 8; | |
1319 | var->transp.length = 8; | |
1320 | var->transp.offset = 24; | |
1321 | break; | |
1322 | default: | |
1323 | return -EINVAL; | |
1324 | } | |
1325 | return 0; | |
1326 | } | |
1327 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1328 | ||
207fd329 DV |
1329 | /** |
1330 | * drm_fb_helper_set_par - implementation for ->fb_set_par | |
1331 | * @info: fbdev registered by the helper | |
1332 | * | |
1333 | * This will let fbcon do the mode init and is called at initialization time by | |
1334 | * the fbdev core when registering the driver, and later on through the hotplug | |
1335 | * callback. | |
1336 | */ | |
785b93ef DA |
1337 | int drm_fb_helper_set_par(struct fb_info *info) |
1338 | { | |
1339 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1340 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1341 | |
c50bfd08 DV |
1342 | if (oops_in_progress) |
1343 | return -EBUSY; | |
1344 | ||
5349ef31 | 1345 | if (var->pixclock != 0) { |
172e91f5 | 1346 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1347 | return -EINVAL; |
1348 | } | |
1349 | ||
5ea1f752 | 1350 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1351 | |
785b93ef DA |
1352 | return 0; |
1353 | } | |
1354 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1355 | ||
1edf0269 | 1356 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1357 | struct fb_info *info) |
1edf0269 RC |
1358 | { |
1359 | struct drm_fb_helper *fb_helper = info->par; | |
1360 | struct drm_device *dev = fb_helper->dev; | |
1361 | struct drm_atomic_state *state; | |
07d3bad6 | 1362 | struct drm_plane *plane; |
1edf0269 | 1363 | int i, ret; |
07d3bad6 | 1364 | unsigned plane_mask; |
1edf0269 RC |
1365 | |
1366 | state = drm_atomic_state_alloc(dev); | |
1367 | if (!state) | |
1368 | return -ENOMEM; | |
1369 | ||
1370 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1371 | retry: | |
07d3bad6 | 1372 | plane_mask = 0; |
1edf0269 RC |
1373 | for(i = 0; i < fb_helper->crtc_count; i++) { |
1374 | struct drm_mode_set *mode_set; | |
1375 | ||
1376 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1377 | ||
1378 | mode_set->x = var->xoffset; | |
1379 | mode_set->y = var->yoffset; | |
1380 | ||
1381 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1382 | if (ret != 0) | |
1383 | goto fail; | |
07d3bad6 ML |
1384 | |
1385 | plane = mode_set->crtc->primary; | |
7118fd9b | 1386 | plane_mask |= (1 << drm_plane_index(plane)); |
07d3bad6 | 1387 | plane->old_fb = plane->fb; |
1edf0269 RC |
1388 | } |
1389 | ||
1390 | ret = drm_atomic_commit(state); | |
1391 | if (ret != 0) | |
1392 | goto fail; | |
1393 | ||
1394 | info->var.xoffset = var->xoffset; | |
1395 | info->var.yoffset = var->yoffset; | |
1396 | ||
1edf0269 | 1397 | fail: |
07d3bad6 | 1398 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
a0fb6ad7 | 1399 | |
1edf0269 RC |
1400 | if (ret == -EDEADLK) |
1401 | goto backoff; | |
1402 | ||
0853695c | 1403 | drm_atomic_state_put(state); |
1edf0269 RC |
1404 | return ret; |
1405 | ||
1406 | backoff: | |
1407 | drm_atomic_state_clear(state); | |
1408 | drm_atomic_legacy_backoff(state); | |
1409 | ||
1410 | goto retry; | |
1411 | } | |
1412 | ||
207fd329 DV |
1413 | /** |
1414 | * drm_fb_helper_pan_display - implementation for ->fb_pan_display | |
1415 | * @var: updated screen information | |
1416 | * @info: fbdev registered by the helper | |
1417 | */ | |
785b93ef DA |
1418 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1419 | struct fb_info *info) | |
1420 | { | |
1421 | struct drm_fb_helper *fb_helper = info->par; | |
1422 | struct drm_device *dev = fb_helper->dev; | |
1423 | struct drm_mode_set *modeset; | |
785b93ef DA |
1424 | int ret = 0; |
1425 | int i; | |
1426 | ||
c50bfd08 | 1427 | if (oops_in_progress) |
9aa609e1 | 1428 | return -EBUSY; |
c50bfd08 DV |
1429 | |
1430 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1431 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1432 | drm_modeset_unlock_all(dev); | |
1433 | return -EBUSY; | |
1434 | } | |
1435 | ||
d3a46183 | 1436 | if (dev->mode_config.funcs->atomic_commit) { |
1edf0269 RC |
1437 | ret = pan_display_atomic(var, info); |
1438 | goto unlock; | |
1439 | } | |
1440 | ||
8be48d92 | 1441 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1442 | modeset = &fb_helper->crtc_info[i].mode_set; |
1443 | ||
1444 | modeset->x = var->xoffset; | |
1445 | modeset->y = var->yoffset; | |
1446 | ||
1447 | if (modeset->num_connectors) { | |
2d13b679 | 1448 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1449 | if (!ret) { |
1450 | info->var.xoffset = var->xoffset; | |
1451 | info->var.yoffset = var->yoffset; | |
1452 | } | |
1453 | } | |
1454 | } | |
1edf0269 | 1455 | unlock: |
84849903 | 1456 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1457 | return ret; |
1458 | } | |
1459 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1460 | ||
8acf658a | 1461 | /* |
207fd329 DV |
1462 | * Allocates the backing storage and sets up the fbdev info structure through |
1463 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1464 | * notifier. | |
8acf658a | 1465 | */ |
de1ace5b DV |
1466 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1467 | int preferred_bpp) | |
785b93ef | 1468 | { |
8acf658a | 1469 | int ret = 0; |
785b93ef | 1470 | int crtc_count = 0; |
4abe3520 | 1471 | int i; |
785b93ef | 1472 | struct fb_info *info; |
38651674 | 1473 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1474 | int gamma_size = 0; |
38651674 DA |
1475 | |
1476 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1477 | sizes.surface_depth = 24; | |
1478 | sizes.surface_bpp = 32; | |
1479 | sizes.fb_width = (unsigned)-1; | |
1480 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 1481 | |
b8c00ac5 DA |
1482 | /* if driver picks 8 or 16 by default use that |
1483 | for both depth/bpp */ | |
96081cdf | 1484 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1485 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1486 | |
785b93ef | 1487 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
1488 | for (i = 0; i < fb_helper->connector_count; i++) { |
1489 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 1490 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1491 | |
eaf99c74 | 1492 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1493 | |
1494 | if (cmdline_mode->bpp_specified) { | |
1495 | switch (cmdline_mode->bpp) { | |
1496 | case 8: | |
38651674 | 1497 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1498 | break; |
1499 | case 15: | |
38651674 DA |
1500 | sizes.surface_depth = 15; |
1501 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1502 | break; |
1503 | case 16: | |
38651674 | 1504 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1505 | break; |
1506 | case 24: | |
38651674 | 1507 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1508 | break; |
1509 | case 32: | |
38651674 DA |
1510 | sizes.surface_depth = 24; |
1511 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1512 | break; |
1513 | } | |
1514 | break; | |
1515 | } | |
1516 | } | |
1517 | ||
8be48d92 DA |
1518 | crtc_count = 0; |
1519 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1520 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1521 | struct drm_mode_set *mode_set; |
1522 | int x, y, j; | |
1523 | /* in case of tile group, are we the last tile vert or horiz? | |
1524 | * If no tile group you are always the last one both vertically | |
1525 | * and horizontally | |
1526 | */ | |
1527 | bool lastv = true, lasth = true; | |
675c8328 | 1528 | |
8be48d92 | 1529 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1530 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1531 | |
1532 | if (!desired_mode) | |
1533 | continue; | |
1534 | ||
1535 | crtc_count++; | |
1536 | ||
b0ee9e7f DA |
1537 | x = fb_helper->crtc_info[i].x; |
1538 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1539 | |
1540 | if (gamma_size == 0) | |
1541 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1542 | ||
1543 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1544 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1545 | |
1546 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1547 | struct drm_connector *connector = mode_set->connectors[j]; | |
1548 | if (connector->has_tile) { | |
1549 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1550 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1551 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1552 | break; | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | if (lasth) | |
1557 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1558 | if (lastv) | |
1559 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1560 | } |
1561 | ||
38651674 | 1562 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1563 | /* hmm everyone went away - assume VGA cable just fell out |
1564 | and will come back later. */ | |
eb1f8e4f | 1565 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1566 | sizes.fb_width = sizes.surface_width = 1024; |
1567 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1568 | } |
1569 | ||
38651674 | 1570 | /* push down into drivers */ |
8acf658a DV |
1571 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1572 | if (ret < 0) | |
1573 | return ret; | |
785b93ef | 1574 | |
38651674 | 1575 | info = fb_helper->fbdev; |
785b93ef | 1576 | |
7e53f3a4 DV |
1577 | /* |
1578 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1579 | * events, but at init time drm_setup_crtcs needs to be called before | |
1580 | * the fb is allocated (since we need to figure out the desired size of | |
1581 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1582 | * here again. | |
1583 | */ | |
96081cdf | 1584 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1585 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1586 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1587 | ||
785b93ef | 1588 | |
8acf658a DV |
1589 | info->var.pixclock = 0; |
1590 | if (register_framebuffer(info) < 0) | |
1591 | return -EINVAL; | |
38651674 | 1592 | |
8acf658a DV |
1593 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
1594 | info->node, info->fix.id); | |
785b93ef | 1595 | |
785b93ef | 1596 | if (list_empty(&kernel_fb_helper_list)) { |
785b93ef DA |
1597 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
1598 | } | |
8acf658a DV |
1599 | |
1600 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
38651674 | 1601 | |
785b93ef DA |
1602 | return 0; |
1603 | } | |
785b93ef | 1604 | |
207fd329 DV |
1605 | /** |
1606 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1607 | * @info: fbdev registered by the helper | |
1608 | * @pitch: desired pitch | |
1609 | * @depth: desired depth | |
1610 | * | |
1611 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1612 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1613 | * additional constraints need to set up their own limits. | |
1614 | * | |
1615 | * Drivers should call this (or their equivalent setup code) from their | |
1616 | * ->fb_probe callback. | |
1617 | */ | |
3632ef89 DA |
1618 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1619 | uint32_t depth) | |
1620 | { | |
1621 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1622 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1623 | FB_VISUAL_TRUECOLOR; | |
1624 | info->fix.mmio_start = 0; | |
1625 | info->fix.mmio_len = 0; | |
1626 | info->fix.type_aux = 0; | |
1627 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1628 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1629 | info->fix.ywrapstep = 0; | |
1630 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1631 | |
1632 | info->fix.line_length = pitch; | |
1633 | return; | |
1634 | } | |
1635 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1636 | ||
207fd329 DV |
1637 | /** |
1638 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1639 | * @info: fbdev instance to set up | |
1640 | * @fb_helper: fb helper instance to use as template | |
1641 | * @fb_width: desired fb width | |
1642 | * @fb_height: desired fb height | |
1643 | * | |
1644 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
1645 | * and the drm framebuffer allocated in fb_helper->fb. | |
1646 | * | |
1647 | * Drivers should call this (or their equivalent setup code) from their | |
1648 | * ->fb_probe callback after having allocated the fbdev backing | |
1649 | * storage framebuffer. | |
1650 | */ | |
38651674 | 1651 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1652 | uint32_t fb_width, uint32_t fb_height) |
1653 | { | |
38651674 DA |
1654 | struct drm_framebuffer *fb = fb_helper->fb; |
1655 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1656 | info->var.xres_virtual = fb->width; |
1657 | info->var.yres_virtual = fb->height; | |
1658 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 1659 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1660 | info->var.xoffset = 0; |
1661 | info->var.yoffset = 0; | |
1662 | info->var.activate = FB_ACTIVATE_NOW; | |
1663 | info->var.height = -1; | |
1664 | info->var.width = -1; | |
1665 | ||
1666 | switch (fb->depth) { | |
1667 | case 8: | |
1668 | info->var.red.offset = 0; | |
1669 | info->var.green.offset = 0; | |
1670 | info->var.blue.offset = 0; | |
1671 | info->var.red.length = 8; /* 8bit DAC */ | |
1672 | info->var.green.length = 8; | |
1673 | info->var.blue.length = 8; | |
1674 | info->var.transp.offset = 0; | |
1675 | info->var.transp.length = 0; | |
1676 | break; | |
1677 | case 15: | |
1678 | info->var.red.offset = 10; | |
1679 | info->var.green.offset = 5; | |
1680 | info->var.blue.offset = 0; | |
1681 | info->var.red.length = 5; | |
1682 | info->var.green.length = 5; | |
1683 | info->var.blue.length = 5; | |
1684 | info->var.transp.offset = 15; | |
1685 | info->var.transp.length = 1; | |
1686 | break; | |
1687 | case 16: | |
1688 | info->var.red.offset = 11; | |
1689 | info->var.green.offset = 5; | |
1690 | info->var.blue.offset = 0; | |
1691 | info->var.red.length = 5; | |
1692 | info->var.green.length = 6; | |
1693 | info->var.blue.length = 5; | |
1694 | info->var.transp.offset = 0; | |
1695 | break; | |
1696 | case 24: | |
1697 | info->var.red.offset = 16; | |
1698 | info->var.green.offset = 8; | |
1699 | info->var.blue.offset = 0; | |
1700 | info->var.red.length = 8; | |
1701 | info->var.green.length = 8; | |
1702 | info->var.blue.length = 8; | |
1703 | info->var.transp.offset = 0; | |
1704 | info->var.transp.length = 0; | |
1705 | break; | |
1706 | case 32: | |
1707 | info->var.red.offset = 16; | |
1708 | info->var.green.offset = 8; | |
1709 | info->var.blue.offset = 0; | |
1710 | info->var.red.length = 8; | |
1711 | info->var.green.length = 8; | |
1712 | info->var.blue.length = 8; | |
1713 | info->var.transp.offset = 24; | |
1714 | info->var.transp.length = 8; | |
1715 | break; | |
1716 | default: | |
1717 | break; | |
1718 | } | |
1719 | ||
1720 | info->var.xres = fb_width; | |
1721 | info->var.yres = fb_height; | |
1722 | } | |
1723 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1724 | |
0b4c0f3f DA |
1725 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1726 | uint32_t maxX, | |
1727 | uint32_t maxY) | |
38651674 DA |
1728 | { |
1729 | struct drm_connector *connector; | |
1730 | int count = 0; | |
0b4c0f3f | 1731 | int i; |
38651674 | 1732 | |
0b4c0f3f DA |
1733 | for (i = 0; i < fb_helper->connector_count; i++) { |
1734 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1735 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1736 | } | |
1737 | ||
1738 | return count; | |
1739 | } | |
1740 | ||
2f1046f3 | 1741 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1742 | { |
1743 | struct drm_display_mode *mode; | |
1744 | ||
0b4c0f3f | 1745 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1746 | if (mode->hdisplay > width || |
1747 | mode->vdisplay > height) | |
38651674 DA |
1748 | continue; |
1749 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1750 | return mode; | |
1751 | } | |
1752 | return NULL; | |
1753 | } | |
2f1046f3 | 1754 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1755 | |
0b4c0f3f | 1756 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1757 | { |
eaf99c74 | 1758 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1759 | } |
1760 | ||
2f1046f3 | 1761 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
0b4c0f3f | 1762 | int width, int height) |
38651674 | 1763 | { |
1794d257 | 1764 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1765 | struct drm_display_mode *mode; |
c683f427 | 1766 | bool prefer_non_interlace; |
38651674 | 1767 | |
eaf99c74 | 1768 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1769 | if (cmdline_mode->specified == false) |
f3af5c7d | 1770 | return NULL; |
38651674 DA |
1771 | |
1772 | /* attempt to find a matching mode in the list of modes | |
1773 | * we have gotten so far, if not add a CVT mode that conforms | |
1774 | */ | |
1775 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1776 | goto create_mode; | |
1777 | ||
c683f427 | 1778 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1779 | again: |
0b4c0f3f | 1780 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1781 | /* check width/height */ |
1782 | if (mode->hdisplay != cmdline_mode->xres || | |
1783 | mode->vdisplay != cmdline_mode->yres) | |
1784 | continue; | |
1785 | ||
1786 | if (cmdline_mode->refresh_specified) { | |
1787 | if (mode->vrefresh != cmdline_mode->refresh) | |
1788 | continue; | |
1789 | } | |
1790 | ||
1791 | if (cmdline_mode->interlace) { | |
1792 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1793 | continue; | |
c683f427 TI |
1794 | } else if (prefer_non_interlace) { |
1795 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1796 | continue; | |
38651674 DA |
1797 | } |
1798 | return mode; | |
1799 | } | |
1800 | ||
c683f427 TI |
1801 | if (prefer_non_interlace) { |
1802 | prefer_non_interlace = false; | |
1803 | goto again; | |
1804 | } | |
1805 | ||
38651674 | 1806 | create_mode: |
1794d257 CW |
1807 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1808 | cmdline_mode); | |
0b4c0f3f | 1809 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1810 | return mode; |
1811 | } | |
2f1046f3 | 1812 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1813 | |
1814 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1815 | { | |
1816 | bool enable; | |
1817 | ||
96081cdf | 1818 | if (strict) |
38651674 | 1819 | enable = connector->status == connector_status_connected; |
96081cdf | 1820 | else |
38651674 | 1821 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1822 | |
38651674 DA |
1823 | return enable; |
1824 | } | |
1825 | ||
0b4c0f3f DA |
1826 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1827 | bool *enabled) | |
38651674 DA |
1828 | { |
1829 | bool any_enabled = false; | |
1830 | struct drm_connector *connector; | |
1831 | int i = 0; | |
1832 | ||
0b4c0f3f DA |
1833 | for (i = 0; i < fb_helper->connector_count; i++) { |
1834 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1835 | enabled[i] = drm_connector_enabled(connector, true); |
1836 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1837 | enabled[i] ? "yes" : "no"); | |
1838 | any_enabled |= enabled[i]; | |
38651674 DA |
1839 | } |
1840 | ||
1841 | if (any_enabled) | |
1842 | return; | |
1843 | ||
0b4c0f3f DA |
1844 | for (i = 0; i < fb_helper->connector_count; i++) { |
1845 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1846 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1847 | } |
1848 | } | |
1849 | ||
1d42bbc8 DA |
1850 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1851 | struct drm_display_mode **modes, | |
b0ee9e7f | 1852 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1853 | bool *enabled, int width, int height) |
1854 | { | |
1855 | int count, i, j; | |
1856 | bool can_clone = false; | |
1857 | struct drm_fb_helper_connector *fb_helper_conn; | |
1858 | struct drm_display_mode *dmt_mode, *mode; | |
1859 | ||
1860 | /* only contemplate cloning in the single crtc case */ | |
1861 | if (fb_helper->crtc_count > 1) | |
1862 | return false; | |
1863 | ||
1864 | count = 0; | |
1865 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1866 | if (enabled[i]) | |
1867 | count++; | |
1868 | } | |
1869 | ||
1870 | /* only contemplate cloning if more than one connector is enabled */ | |
1871 | if (count <= 1) | |
1872 | return false; | |
1873 | ||
1874 | /* check the command line or if nothing common pick 1024x768 */ | |
1875 | can_clone = true; | |
1876 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1877 | if (!enabled[i]) | |
1878 | continue; | |
1879 | fb_helper_conn = fb_helper->connector_info[i]; | |
1880 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1881 | if (!modes[i]) { | |
1882 | can_clone = false; | |
1883 | break; | |
1884 | } | |
1885 | for (j = 0; j < i; j++) { | |
1886 | if (!enabled[j]) | |
1887 | continue; | |
1888 | if (!drm_mode_equal(modes[j], modes[i])) | |
1889 | can_clone = false; | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | if (can_clone) { | |
1894 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1895 | return true; | |
1896 | } | |
1897 | ||
1898 | /* try and find a 1024x768 mode on each connector */ | |
1899 | can_clone = true; | |
f6e252ba | 1900 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1901 | |
1902 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1903 | ||
1904 | if (!enabled[i]) | |
1905 | continue; | |
1906 | ||
1907 | fb_helper_conn = fb_helper->connector_info[i]; | |
1908 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1909 | if (drm_mode_equal(mode, dmt_mode)) | |
1910 | modes[i] = mode; | |
1911 | } | |
1912 | if (!modes[i]) | |
1913 | can_clone = false; | |
1914 | } | |
1915 | ||
1916 | if (can_clone) { | |
1917 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1918 | return true; | |
1919 | } | |
1920 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1921 | return false; | |
1922 | } | |
1923 | ||
b0ee9e7f DA |
1924 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1925 | struct drm_display_mode **modes, | |
1926 | struct drm_fb_offset *offsets, | |
1927 | int idx, | |
1928 | int h_idx, int v_idx) | |
1929 | { | |
1930 | struct drm_fb_helper_connector *fb_helper_conn; | |
1931 | int i; | |
1932 | int hoffset = 0, voffset = 0; | |
1933 | ||
1934 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1935 | fb_helper_conn = fb_helper->connector_info[i]; | |
1936 | if (!fb_helper_conn->connector->has_tile) | |
1937 | continue; | |
1938 | ||
1939 | if (!modes[i] && (h_idx || v_idx)) { | |
1940 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
1941 | fb_helper_conn->connector->base.id); | |
1942 | continue; | |
1943 | } | |
1944 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
1945 | hoffset += modes[i]->hdisplay; | |
1946 | ||
1947 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
1948 | voffset += modes[i]->vdisplay; | |
1949 | } | |
1950 | offsets[idx].x = hoffset; | |
1951 | offsets[idx].y = voffset; | |
1952 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
1953 | return 0; | |
1954 | } | |
1955 | ||
0b4c0f3f | 1956 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 1957 | struct drm_display_mode **modes, |
b0ee9e7f | 1958 | struct drm_fb_offset *offsets, |
38651674 DA |
1959 | bool *enabled, int width, int height) |
1960 | { | |
0b4c0f3f DA |
1961 | struct drm_fb_helper_connector *fb_helper_conn; |
1962 | int i; | |
b0ee9e7f DA |
1963 | uint64_t conn_configured = 0, mask; |
1964 | int tile_pass = 0; | |
1965 | mask = (1 << fb_helper->connector_count) - 1; | |
1966 | retry: | |
0b4c0f3f DA |
1967 | for (i = 0; i < fb_helper->connector_count; i++) { |
1968 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1969 | |
b0ee9e7f DA |
1970 | if (conn_configured & (1 << i)) |
1971 | continue; | |
1972 | ||
1973 | if (enabled[i] == false) { | |
1974 | conn_configured |= (1 << i); | |
1975 | continue; | |
1976 | } | |
1977 | ||
1978 | /* first pass over all the untiled connectors */ | |
1979 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 1980 | continue; |
38651674 | 1981 | |
b0ee9e7f DA |
1982 | if (tile_pass == 1) { |
1983 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
1984 | fb_helper_conn->connector->tile_v_loc != 0) | |
1985 | continue; | |
1986 | ||
1987 | } else { | |
1988 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && | |
1989 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) | |
1990 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
1991 | continue; | |
1992 | ||
1993 | /* find the tile offsets for this pass - need | |
1994 | to find all tiles left and above */ | |
1995 | drm_get_tile_offsets(fb_helper, modes, offsets, | |
1996 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
1997 | } | |
38651674 | 1998 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 1999 | fb_helper_conn->connector->base.id); |
38651674 DA |
2000 | |
2001 | /* got for command line mode first */ | |
0b4c0f3f | 2002 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 | 2003 | if (!modes[i]) { |
b0ee9e7f DA |
2004 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
2005 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 2006 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
2007 | } |
2008 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
2009 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
2010 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
2011 | break; |
2012 | } | |
2013 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
2014 | "none"); | |
b0ee9e7f DA |
2015 | conn_configured |= (1 << i); |
2016 | } | |
2017 | ||
2018 | if ((conn_configured & mask) != mask) { | |
2019 | tile_pass++; | |
2020 | goto retry; | |
38651674 DA |
2021 | } |
2022 | return true; | |
2023 | } | |
2024 | ||
8be48d92 DA |
2025 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
2026 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
2027 | struct drm_display_mode **modes, |
2028 | int n, int width, int height) | |
2029 | { | |
2030 | int c, o; | |
2031 | struct drm_connector *connector; | |
be26a66d | 2032 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 2033 | struct drm_encoder *encoder; |
38651674 | 2034 | int my_score, best_score, score; |
8be48d92 | 2035 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 2036 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 2037 | |
0b4c0f3f | 2038 | if (n == fb_helper->connector_count) |
38651674 | 2039 | return 0; |
0b4c0f3f DA |
2040 | |
2041 | fb_helper_conn = fb_helper->connector_info[n]; | |
2042 | connector = fb_helper_conn->connector; | |
38651674 DA |
2043 | |
2044 | best_crtcs[n] = NULL; | |
8be48d92 | 2045 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
2046 | if (modes[n] == NULL) |
2047 | return best_score; | |
2048 | ||
255f0e7c | 2049 | crtcs = kzalloc(fb_helper->connector_count * |
8be48d92 | 2050 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
2051 | if (!crtcs) |
2052 | return best_score; | |
2053 | ||
2054 | my_score = 1; | |
2055 | if (connector->status == connector_status_connected) | |
2056 | my_score++; | |
0b4c0f3f | 2057 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 2058 | my_score++; |
0b4c0f3f | 2059 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
2060 | my_score++; |
2061 | ||
2062 | connector_funcs = connector->helper_private; | |
c61b93fe BB |
2063 | |
2064 | /* | |
2065 | * If the DRM device implements atomic hooks and ->best_encoder() is | |
2066 | * NULL we fallback to the default drm_atomic_helper_best_encoder() | |
2067 | * helper. | |
2068 | */ | |
2069 | if (fb_helper->dev->mode_config.funcs->atomic_commit && | |
2070 | !connector_funcs->best_encoder) | |
2071 | encoder = drm_atomic_helper_best_encoder(connector); | |
2072 | else | |
2073 | encoder = connector_funcs->best_encoder(connector); | |
2074 | ||
38651674 DA |
2075 | if (!encoder) |
2076 | goto out; | |
2077 | ||
38651674 DA |
2078 | /* select a crtc for this connector and then attempt to configure |
2079 | remaining connectors */ | |
8be48d92 DA |
2080 | for (c = 0; c < fb_helper->crtc_count; c++) { |
2081 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 2082 | |
96081cdf | 2083 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 2084 | continue; |
38651674 DA |
2085 | |
2086 | for (o = 0; o < n; o++) | |
2087 | if (best_crtcs[o] == crtc) | |
2088 | break; | |
2089 | ||
2090 | if (o < n) { | |
1d42bbc8 DA |
2091 | /* ignore cloning unless only a single crtc */ |
2092 | if (fb_helper->crtc_count > 1) | |
2093 | continue; | |
2094 | ||
2095 | if (!drm_mode_equal(modes[o], modes[n])) | |
2096 | continue; | |
38651674 DA |
2097 | } |
2098 | ||
2099 | crtcs[n] = crtc; | |
8be48d92 DA |
2100 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
2101 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
2102 | width, height); |
2103 | if (score > best_score) { | |
38651674 DA |
2104 | best_score = score; |
2105 | memcpy(best_crtcs, crtcs, | |
255f0e7c | 2106 | fb_helper->connector_count * |
8be48d92 | 2107 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 2108 | } |
38651674 DA |
2109 | } |
2110 | out: | |
2111 | kfree(crtcs); | |
2112 | return best_score; | |
2113 | } | |
2114 | ||
8be48d92 | 2115 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 2116 | { |
8be48d92 DA |
2117 | struct drm_device *dev = fb_helper->dev; |
2118 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 2119 | struct drm_display_mode **modes; |
b0ee9e7f | 2120 | struct drm_fb_offset *offsets; |
38651674 DA |
2121 | bool *enabled; |
2122 | int width, height; | |
11e17a08 | 2123 | int i; |
38651674 DA |
2124 | |
2125 | DRM_DEBUG_KMS("\n"); | |
2126 | ||
2127 | width = dev->mode_config.max_width; | |
2128 | height = dev->mode_config.max_height; | |
2129 | ||
383b2e57 | 2130 | crtcs = kcalloc(fb_helper->connector_count, |
8be48d92 | 2131 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
383b2e57 | 2132 | modes = kcalloc(fb_helper->connector_count, |
38651674 | 2133 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
383b2e57 | 2134 | offsets = kcalloc(fb_helper->connector_count, |
b0ee9e7f | 2135 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
383b2e57 | 2136 | enabled = kcalloc(fb_helper->connector_count, |
38651674 | 2137 | sizeof(bool), GFP_KERNEL); |
b0ee9e7f | 2138 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
2139 | DRM_ERROR("Memory allocation failed\n"); |
2140 | goto out; | |
2141 | } | |
2142 | ||
38651674 | 2143 | |
0b4c0f3f | 2144 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2145 | |
11e17a08 JB |
2146 | if (!(fb_helper->funcs->initial_config && |
2147 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2148 | offsets, |
11e17a08 | 2149 | enabled, width, height))) { |
383b2e57 ML |
2150 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
2151 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); | |
2152 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); | |
11e17a08 | 2153 | |
b0ee9e7f DA |
2154 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2155 | enabled, width, height) && | |
2156 | !drm_target_preferred(fb_helper, modes, offsets, | |
2157 | enabled, width, height)) | |
1d42bbc8 | 2158 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2159 | |
11e17a08 JB |
2160 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2161 | width, height); | |
38651674 | 2162 | |
11e17a08 JB |
2163 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2164 | } | |
8be48d92 DA |
2165 | |
2166 | /* need to set the modesets up here for use later */ | |
2167 | /* fill out the connector<->crtc mappings into the modesets */ | |
a2889606 VS |
2168 | for (i = 0; i < fb_helper->crtc_count; i++) |
2169 | drm_fb_helper_modeset_release(fb_helper, | |
2170 | &fb_helper->crtc_info[i].mode_set); | |
38651674 | 2171 | |
0b4c0f3f | 2172 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 2173 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2174 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2175 | struct drm_fb_offset *offset = &offsets[i]; |
a2889606 | 2176 | struct drm_mode_set *modeset = &fb_crtc->mode_set; |
38651674 | 2177 | |
8be48d92 | 2178 | if (mode && fb_crtc) { |
a2889606 VS |
2179 | struct drm_connector *connector = |
2180 | fb_helper->connector_info[i]->connector; | |
2181 | ||
b0ee9e7f DA |
2182 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2183 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
a2889606 | 2184 | |
8be48d92 | 2185 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2186 | fb_crtc->x = offset->x; |
2187 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2188 | modeset->mode = drm_mode_duplicate(dev, |
2189 | fb_crtc->desired_mode); | |
a2889606 VS |
2190 | drm_connector_reference(connector); |
2191 | modeset->connectors[modeset->num_connectors++] = connector; | |
7e53f3a4 | 2192 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2193 | modeset->x = offset->x; |
2194 | modeset->y = offset->y; | |
7e53f3a4 DV |
2195 | } |
2196 | } | |
8c5eaca0 | 2197 | out: |
38651674 DA |
2198 | kfree(crtcs); |
2199 | kfree(modes); | |
b0ee9e7f | 2200 | kfree(offsets); |
38651674 DA |
2201 | kfree(enabled); |
2202 | } | |
2203 | ||
2204 | /** | |
207fd329 | 2205 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2206 | * @fb_helper: fb_helper device struct |
2207 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2208 | * |
d0ddc033 | 2209 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2210 | * At the moment, this is a cloned configuration across all heads with |
2211 | * a new framebuffer object as the backing store. | |
2212 | * | |
207fd329 DV |
2213 | * Note that this also registers the fbdev and so allows userspace to call into |
2214 | * the driver through the fbdev interfaces. | |
2215 | * | |
2216 | * This function will call down into the ->fb_probe callback to let | |
2217 | * the driver allocate and initialize the fbdev info structure and the drm | |
2218 | * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
2219 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default | |
2220 | * values for the fbdev info structure. | |
2221 | * | |
40f8cf4b DV |
2222 | * HANG DEBUGGING: |
2223 | * | |
2224 | * When you have fbcon support built-in or already loaded, this function will do | |
2225 | * a full modeset to setup the fbdev console. Due to locking misdesign in the | |
2226 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding | |
2227 | * console_lock. Until console_unlock is called no dmesg lines will be sent out | |
2228 | * to consoles, not even serial console. This means when your driver crashes, | |
2229 | * you will see absolutely nothing else but a system stuck in this function, | |
2230 | * with no further output. Any kind of printk() you place within your own driver | |
2231 | * or in the drm core modeset code will also never show up. | |
2232 | * | |
2233 | * Standard debug practice is to run the fbcon setup without taking the | |
2234 | * console_lock as a hack, to be able to see backtraces and crashes on the | |
2235 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel | |
2236 | * cmdline option. | |
2237 | * | |
2238 | * The other option is to just disable fbdev emulation since very likely the | |
af509d38 L |
2239 | * first modeset from userspace will crash in the same way, and is even easier |
2240 | * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 | |
40f8cf4b DV |
2241 | * kernel cmdline option. |
2242 | * | |
38651674 DA |
2243 | * RETURNS: |
2244 | * Zero if everything went ok, nonzero otherwise. | |
2245 | */ | |
01934c2a | 2246 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2247 | { |
8be48d92 | 2248 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
2249 | int count = 0; |
2250 | ||
f64c5573 DV |
2251 | if (!drm_fbdev_emulation) |
2252 | return 0; | |
2253 | ||
53f1904b | 2254 | mutex_lock(&dev->mode_config.mutex); |
0b4c0f3f DA |
2255 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
2256 | dev->mode_config.max_width, | |
2257 | dev->mode_config.max_height); | |
53f1904b | 2258 | mutex_unlock(&dev->mode_config.mutex); |
38651674 DA |
2259 | /* |
2260 | * we shouldn't end up with no modes here. | |
2261 | */ | |
96081cdf | 2262 | if (count == 0) |
d56b1b9d | 2263 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 2264 | |
8be48d92 | 2265 | drm_setup_crtcs(fb_helper); |
38651674 | 2266 | |
4abe3520 | 2267 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 2268 | } |
8be48d92 | 2269 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2270 | |
7394371d CW |
2271 | /** |
2272 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2273 | * probing all the outputs attached to the fb |
7394371d CW |
2274 | * @fb_helper: the drm_fb_helper |
2275 | * | |
7394371d | 2276 | * Scan the connectors attached to the fb_helper and try to put together a |
62cacc79 | 2277 | * setup after notification of a change in output configuration. |
7394371d | 2278 | * |
207fd329 DV |
2279 | * Called at runtime, takes the mode config locks to be able to check/change the |
2280 | * modeset configuration. Must be run from process context (which usually means | |
2281 | * either the output polling work or a work item launched from the driver's | |
2282 | * hotplug interrupt). | |
2283 | * | |
50c3dc97 | 2284 | * Note that drivers may call this even before calling |
af509d38 | 2285 | * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows |
50c3dc97 DV |
2286 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
2287 | * not miss any hotplug events. | |
207fd329 | 2288 | * |
7394371d CW |
2289 | * RETURNS: |
2290 | * 0 on success and a non-zero error code otherwise. | |
2291 | */ | |
2292 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2293 | { |
7394371d | 2294 | struct drm_device *dev = fb_helper->dev; |
51bbd276 | 2295 | u32 max_width, max_height; |
5c4426a7 | 2296 | |
f64c5573 DV |
2297 | if (!drm_fbdev_emulation) |
2298 | return 0; | |
2299 | ||
89ced125 | 2300 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
50c3dc97 | 2301 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2302 | fb_helper->delayed_hotplug = true; |
89ced125 | 2303 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
7394371d | 2304 | return 0; |
4abe3520 | 2305 | } |
eb1f8e4f | 2306 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2307 | |
eb1f8e4f DA |
2308 | max_width = fb_helper->fb->width; |
2309 | max_height = fb_helper->fb->height; | |
5c4426a7 | 2310 | |
51bbd276 | 2311 | drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); |
89ced125 DV |
2312 | mutex_unlock(&fb_helper->dev->mode_config.mutex); |
2313 | ||
2314 | drm_modeset_lock_all(dev); | |
eb1f8e4f | 2315 | drm_setup_crtcs(fb_helper); |
84849903 | 2316 | drm_modeset_unlock_all(dev); |
2180c3c7 DV |
2317 | drm_fb_helper_set_par(fb_helper->fbdev); |
2318 | ||
2319 | return 0; | |
5c4426a7 | 2320 | } |
eb1f8e4f | 2321 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2322 | |
6a108a14 | 2323 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2324 | * but the module doesn't depend on any fb console symbols. At least |
2325 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2326 | */ | |
70412cfa | 2327 | int __init drm_fb_helper_modinit(void) |
3ce05168 | 2328 | { |
70412cfa | 2329 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2330 | const char *name = "fbcon"; |
2331 | struct module *fbcon; | |
2332 | ||
2333 | mutex_lock(&module_mutex); | |
2334 | fbcon = find_module(name); | |
2335 | mutex_unlock(&module_mutex); | |
2336 | ||
2337 | if (!fbcon) | |
2338 | request_module_nowait(name); | |
70412cfa | 2339 | #endif |
3ce05168 DF |
2340 | return 0; |
2341 | } | |
70412cfa | 2342 | EXPORT_SYMBOL(drm_fb_helper_modinit); |