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 | 51 | static LIST_HEAD(kernel_fb_helper_list); |
a53ca635 | 52 | static DEFINE_MUTEX(kernel_fb_helper_lock); |
785b93ef | 53 | |
d0ddc033 DV |
54 | /** |
55 | * DOC: fbdev helpers | |
56 | * | |
57 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
83c617c5 | 58 | * mode setting driver. They can be used mostly independently from the crtc |
d0ddc033 DV |
59 | * helper functions used by many drivers to implement the kernel mode setting |
60 | * interfaces. | |
207fd329 | 61 | * |
10a23102 TR |
62 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
63 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and | |
64 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the | |
65 | * default behaviour can override the third step with their own code. | |
66 | * Teardown is done with drm_fb_helper_fini(). | |
207fd329 DV |
67 | * |
68 | * At runtime drivers should restore the fbdev console by calling | |
6806cdf9 DV |
69 | * drm_fb_helper_restore_fbdev_mode_unlocked() from their &drm_driver.lastclose |
70 | * callback. They should also notify the fb helper code from updates to the | |
71 | * output configuration by calling drm_fb_helper_hotplug_event(). For easier | |
207fd329 | 72 | * integration with the output polling code in drm_crtc_helper.c the modeset |
6806cdf9 | 73 | * code provides a &drm_mode_config_funcs.output_poll_changed callback. |
207fd329 DV |
74 | * |
75 | * All other functions exported by the fb helper library can be used to | |
76 | * implement the fbdev driver interface by the driver. | |
10a23102 TR |
77 | * |
78 | * It is possible, though perhaps somewhat tricky, to implement race-free | |
79 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() | |
80 | * helper must be called first to initialize the minimum required to make | |
81 | * hotplug detection work. Drivers also need to make sure to properly set up | |
6806cdf9 | 82 | * the &drm_mode_config.funcs member. After calling drm_kms_helper_poll_init() |
10a23102 TR |
83 | * it is safe to enable interrupts and start processing hotplug events. At the |
84 | * same time, drivers should initialize all modeset objects such as CRTCs, | |
85 | * encoders and connectors. To finish up the fbdev helper initialization, the | |
86 | * drm_fb_helper_init() function is called. To probe for all attached displays | |
87 | * and set up an initial configuration using the detected hardware, drivers | |
88 | * should call drm_fb_helper_single_add_all_connectors() followed by | |
89 | * drm_fb_helper_initial_config(). | |
eaa434de | 90 | * |
6806cdf9 | 91 | * If &drm_framebuffer_funcs.dirty is set, the |
2dad551c | 92 | * drm_fb_helper_{cfb,sys}_{write,fillrect,copyarea,imageblit} functions will |
6806cdf9 | 93 | * accumulate changes and schedule &drm_fb_helper.dirty_work to run right |
2dad551c NT |
94 | * away. This worker then calls the dirty() function ensuring that it will |
95 | * always run in process context since the fb_*() function could be running in | |
96 | * atomic context. If drm_fb_helper_deferred_io() is used as the deferred_io | |
97 | * callback it will also schedule dirty_work with the damage collected from the | |
98 | * mmap page writes. | |
d0ddc033 DV |
99 | */ |
100 | ||
966a6a13 CW |
101 | #define drm_fb_helper_for_each_connector(fbh, i__) \ |
102 | for (({ lockdep_assert_held(&(fbh)->dev->mode_config.mutex); }), \ | |
103 | i__ = 0; i__ < (fbh)->connector_count; i__++) | |
104 | ||
207fd329 DV |
105 | /** |
106 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
107 | * emulation helper | |
108 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
109 | * | |
110 | * This functions adds all the available connectors for use with the given | |
111 | * fb_helper. This is a separate step to allow drivers to freely assign | |
112 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
113 | * not adequate to be used for the fbcon. | |
114 | * | |
169faeca DV |
115 | * This function is protected against concurrent connector hotadds/removals |
116 | * using drm_fb_helper_add_one_connector() and | |
117 | * drm_fb_helper_remove_one_connector(). | |
207fd329 | 118 | */ |
0b4c0f3f | 119 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 120 | { |
0b4c0f3f DA |
121 | struct drm_device *dev = fb_helper->dev; |
122 | struct drm_connector *connector; | |
c36a3254 DV |
123 | struct drm_connector_list_iter conn_iter; |
124 | int i, ret = 0; | |
d50ba256 | 125 | |
f64c5573 DV |
126 | if (!drm_fbdev_emulation) |
127 | return 0; | |
128 | ||
169faeca | 129 | mutex_lock(&dev->mode_config.mutex); |
c36a3254 DV |
130 | drm_connector_list_iter_get(dev, &conn_iter); |
131 | drm_for_each_connector_iter(connector, &conn_iter) { | |
15fce29d | 132 | ret = drm_fb_helper_add_one_connector(fb_helper, connector); |
0b4c0f3f | 133 | |
15fce29d | 134 | if (ret) |
0b4c0f3f | 135 | goto fail; |
0b4c0f3f | 136 | } |
c36a3254 DV |
137 | goto out; |
138 | ||
0b4c0f3f | 139 | fail: |
966a6a13 | 140 | drm_fb_helper_for_each_connector(fb_helper, i) { |
7dfcb36a VS |
141 | struct drm_fb_helper_connector *fb_helper_connector = |
142 | fb_helper->connector_info[i]; | |
143 | ||
144 | drm_connector_unreference(fb_helper_connector->connector); | |
145 | ||
146 | kfree(fb_helper_connector); | |
0b4c0f3f DA |
147 | fb_helper->connector_info[i] = NULL; |
148 | } | |
149 | fb_helper->connector_count = 0; | |
c36a3254 DV |
150 | out: |
151 | drm_connector_list_iter_put(&conn_iter); | |
169faeca DV |
152 | mutex_unlock(&dev->mode_config.mutex); |
153 | ||
15fce29d | 154 | return ret; |
d50ba256 | 155 | } |
0b4c0f3f | 156 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 157 | |
65c2a89c DA |
158 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) |
159 | { | |
160 | struct drm_fb_helper_connector **temp; | |
161 | struct drm_fb_helper_connector *fb_helper_connector; | |
162 | ||
f64c5573 DV |
163 | if (!drm_fbdev_emulation) |
164 | return 0; | |
165 | ||
65c2a89c DA |
166 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
167 | if (fb_helper->connector_count + 1 > fb_helper->connector_info_alloc_count) { | |
14f476fa | 168 | temp = krealloc(fb_helper->connector_info, sizeof(struct drm_fb_helper_connector *) * (fb_helper->connector_count + 1), GFP_KERNEL); |
65c2a89c DA |
169 | if (!temp) |
170 | return -ENOMEM; | |
171 | ||
172 | fb_helper->connector_info_alloc_count = fb_helper->connector_count + 1; | |
173 | fb_helper->connector_info = temp; | |
174 | } | |
175 | ||
176 | ||
177 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
178 | if (!fb_helper_connector) | |
179 | return -ENOMEM; | |
180 | ||
6e86d58b | 181 | drm_connector_reference(connector); |
65c2a89c DA |
182 | fb_helper_connector->connector = connector; |
183 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
184 | return 0; | |
185 | } | |
186 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); | |
187 | ||
188 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, | |
189 | struct drm_connector *connector) | |
190 | { | |
191 | struct drm_fb_helper_connector *fb_helper_connector; | |
192 | int i, j; | |
193 | ||
f64c5573 DV |
194 | if (!drm_fbdev_emulation) |
195 | return 0; | |
196 | ||
65c2a89c DA |
197 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
198 | ||
199 | for (i = 0; i < fb_helper->connector_count; i++) { | |
200 | if (fb_helper->connector_info[i]->connector == connector) | |
201 | break; | |
202 | } | |
203 | ||
204 | if (i == fb_helper->connector_count) | |
205 | return -EINVAL; | |
206 | fb_helper_connector = fb_helper->connector_info[i]; | |
6e86d58b | 207 | drm_connector_unreference(fb_helper_connector->connector); |
65c2a89c DA |
208 | |
209 | for (j = i + 1; j < fb_helper->connector_count; j++) { | |
210 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; | |
211 | } | |
212 | fb_helper->connector_count--; | |
213 | kfree(fb_helper_connector); | |
2148f18f | 214 | |
65c2a89c DA |
215 | return 0; |
216 | } | |
217 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); | |
218 | ||
99231028 JW |
219 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
220 | { | |
221 | uint16_t *r_base, *g_base, *b_base; | |
222 | int i; | |
223 | ||
04c0c569 VS |
224 | if (helper->funcs->gamma_get == NULL) |
225 | return; | |
226 | ||
99231028 JW |
227 | r_base = crtc->gamma_store; |
228 | g_base = r_base + crtc->gamma_size; | |
229 | b_base = g_base + crtc->gamma_size; | |
230 | ||
231 | for (i = 0; i < crtc->gamma_size; i++) | |
232 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
233 | } | |
234 | ||
235 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
236 | { | |
237 | uint16_t *r_base, *g_base, *b_base; | |
238 | ||
ebe0f244 LP |
239 | if (crtc->funcs->gamma_set == NULL) |
240 | return; | |
241 | ||
99231028 JW |
242 | r_base = crtc->gamma_store; |
243 | g_base = r_base + crtc->gamma_size; | |
244 | b_base = g_base + crtc->gamma_size; | |
245 | ||
7ea77283 | 246 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); |
99231028 JW |
247 | } |
248 | ||
207fd329 | 249 | /** |
6806cdf9 | 250 | * drm_fb_helper_debug_enter - implementation for &fb_ops.fb_debug_enter |
207fd329 DV |
251 | * @info: fbdev registered by the helper |
252 | */ | |
1a7aba7f JB |
253 | int drm_fb_helper_debug_enter(struct fb_info *info) |
254 | { | |
255 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 256 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
257 | int i; |
258 | ||
1a7aba7f JB |
259 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
260 | for (i = 0; i < helper->crtc_count; i++) { | |
261 | struct drm_mode_set *mode_set = | |
262 | &helper->crtc_info[i].mode_set; | |
263 | ||
264 | if (!mode_set->crtc->enabled) | |
265 | continue; | |
266 | ||
267 | funcs = mode_set->crtc->helper_private; | |
1b99b724 SC |
268 | if (funcs->mode_set_base_atomic == NULL) |
269 | continue; | |
270 | ||
99231028 | 271 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
272 | funcs->mode_set_base_atomic(mode_set->crtc, |
273 | mode_set->fb, | |
274 | mode_set->x, | |
413d45d3 | 275 | mode_set->y, |
21c74a8e | 276 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
277 | } |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
283 | ||
284 | /* Find the real fb for a given fb helper CRTC */ | |
285 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
286 | { | |
287 | struct drm_device *dev = crtc->dev; | |
288 | struct drm_crtc *c; | |
289 | ||
6295d607 | 290 | drm_for_each_crtc(c, dev) { |
1a7aba7f | 291 | if (crtc->base.id == c->base.id) |
f4510a27 | 292 | return c->primary->fb; |
1a7aba7f JB |
293 | } |
294 | ||
295 | return NULL; | |
296 | } | |
297 | ||
207fd329 | 298 | /** |
6806cdf9 | 299 | * drm_fb_helper_debug_leave - implementation for &fb_ops.fb_debug_leave |
207fd329 DV |
300 | * @info: fbdev registered by the helper |
301 | */ | |
1a7aba7f JB |
302 | int drm_fb_helper_debug_leave(struct fb_info *info) |
303 | { | |
304 | struct drm_fb_helper *helper = info->par; | |
305 | struct drm_crtc *crtc; | |
be26a66d | 306 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
307 | struct drm_framebuffer *fb; |
308 | int i; | |
309 | ||
310 | for (i = 0; i < helper->crtc_count; i++) { | |
311 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
312 | crtc = mode_set->crtc; | |
313 | funcs = crtc->helper_private; | |
314 | fb = drm_mode_config_fb(crtc); | |
315 | ||
316 | if (!crtc->enabled) | |
317 | continue; | |
318 | ||
319 | if (!fb) { | |
320 | DRM_ERROR("no fb to restore??\n"); | |
321 | continue; | |
322 | } | |
323 | ||
1b99b724 SC |
324 | if (funcs->mode_set_base_atomic == NULL) |
325 | continue; | |
326 | ||
99231028 | 327 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 328 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 329 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
330 | } |
331 | ||
332 | return 0; | |
333 | } | |
334 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
335 | ||
bbb1e524 RC |
336 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
337 | { | |
338 | struct drm_device *dev = fb_helper->dev; | |
339 | struct drm_plane *plane; | |
340 | struct drm_atomic_state *state; | |
341 | int i, ret; | |
f72c6b33 | 342 | unsigned plane_mask; |
bbb1e524 RC |
343 | |
344 | state = drm_atomic_state_alloc(dev); | |
345 | if (!state) | |
346 | return -ENOMEM; | |
347 | ||
348 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
349 | retry: | |
f72c6b33 | 350 | plane_mask = 0; |
bbb1e524 RC |
351 | drm_for_each_plane(plane, dev) { |
352 | struct drm_plane_state *plane_state; | |
353 | ||
354 | plane_state = drm_atomic_get_plane_state(state, plane); | |
355 | if (IS_ERR(plane_state)) { | |
356 | ret = PTR_ERR(plane_state); | |
357 | goto fail; | |
358 | } | |
359 | ||
31ad61e4 | 360 | plane_state->rotation = DRM_ROTATE_0; |
bbb1e524 | 361 | |
f72c6b33 ML |
362 | plane->old_fb = plane->fb; |
363 | plane_mask |= 1 << drm_plane_index(plane); | |
364 | ||
bbb1e524 RC |
365 | /* disable non-primary: */ |
366 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
367 | continue; | |
368 | ||
369 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
370 | if (ret != 0) | |
371 | goto fail; | |
372 | } | |
373 | ||
374 | for(i = 0; i < fb_helper->crtc_count; i++) { | |
375 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
376 | ||
377 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
378 | if (ret != 0) | |
379 | goto fail; | |
380 | } | |
381 | ||
382 | ret = drm_atomic_commit(state); | |
bbb1e524 RC |
383 | |
384 | fail: | |
f72c6b33 | 385 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
94284037 | 386 | |
bbb1e524 RC |
387 | if (ret == -EDEADLK) |
388 | goto backoff; | |
389 | ||
0853695c | 390 | drm_atomic_state_put(state); |
bbb1e524 RC |
391 | return ret; |
392 | ||
393 | backoff: | |
394 | drm_atomic_state_clear(state); | |
395 | drm_atomic_legacy_backoff(state); | |
396 | ||
397 | goto retry; | |
398 | } | |
399 | ||
b7bdf0a8 | 400 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 401 | { |
3858bc5d VS |
402 | struct drm_device *dev = fb_helper->dev; |
403 | struct drm_plane *plane; | |
3858bc5d VS |
404 | int i; |
405 | ||
406 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 407 | |
a743d758 | 408 | if (drm_drv_uses_atomic_modeset(dev)) |
bbb1e524 RC |
409 | return restore_fbdev_mode_atomic(fb_helper); |
410 | ||
6295d607 | 411 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
412 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
413 | drm_plane_force_disable(plane); | |
6aed8ec3 | 414 | |
6686df8c | 415 | if (plane->rotation_property) |
d138dd3c VS |
416 | drm_mode_plane_set_obj_prop(plane, |
417 | plane->rotation_property, | |
418 | DRM_ROTATE_0); | |
9783de20 SJ |
419 | } |
420 | ||
e8e7a2b8 DA |
421 | for (i = 0; i < fb_helper->crtc_count; i++) { |
422 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
423 | struct drm_crtc *crtc = mode_set->crtc; |
424 | int ret; | |
425 | ||
03f9abb2 AD |
426 | if (crtc->funcs->cursor_set2) { |
427 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
428 | if (ret) | |
48f87dd1 | 429 | return ret; |
03f9abb2 | 430 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
431 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
432 | if (ret) | |
b7bdf0a8 | 433 | return ret; |
3858bc5d VS |
434 | } |
435 | ||
2d13b679 | 436 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 437 | if (ret) |
b7bdf0a8 | 438 | return ret; |
e8e7a2b8 | 439 | } |
b7bdf0a8 DV |
440 | |
441 | return 0; | |
e8e7a2b8 | 442 | } |
5ea1f752 RC |
443 | |
444 | /** | |
445 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
446 | * @fb_helper: fbcon to restore | |
447 | * | |
6806cdf9 | 448 | * This should be called from driver's drm &drm_driver.lastclose callback |
5ea1f752 RC |
449 | * when implementing an fbcon on top of kms using this helper. This ensures that |
450 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
451 | * |
452 | * RETURNS: | |
453 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 454 | */ |
b7bdf0a8 | 455 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
456 | { |
457 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
458 | bool do_delayed; |
459 | int ret; | |
e2809c7d | 460 | |
f64c5573 DV |
461 | if (!drm_fbdev_emulation) |
462 | return -ENODEV; | |
463 | ||
5ea1f752 RC |
464 | drm_modeset_lock_all(dev); |
465 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
466 | |
467 | do_delayed = fb_helper->delayed_hotplug; | |
468 | if (do_delayed) | |
469 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 470 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
471 | |
472 | if (do_delayed) | |
473 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
474 | return ret; |
475 | } | |
476 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 477 | |
2c4124fd GU |
478 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
479 | { | |
480 | struct drm_device *dev = fb_helper->dev; | |
481 | struct drm_crtc *crtc; | |
482 | int bound = 0, crtcs_bound = 0; | |
483 | ||
484 | /* Sometimes user space wants everything disabled, so don't steal the | |
485 | * display if there's a master. */ | |
f17b3ea3 | 486 | if (READ_ONCE(dev->master)) |
2c4124fd GU |
487 | return false; |
488 | ||
489 | drm_for_each_crtc(crtc, dev) { | |
490 | if (crtc->primary->fb) | |
491 | crtcs_bound++; | |
492 | if (crtc->primary->fb == fb_helper->fb) | |
493 | bound++; | |
494 | } | |
495 | ||
496 | if (bound < crtcs_bound) | |
497 | return false; | |
498 | ||
499 | return true; | |
500 | } | |
501 | ||
502 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
503 | /* |
504 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
505 | * and panic handling. | |
506 | */ | |
78b9c353 | 507 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 508 | { |
785b93ef DA |
509 | bool ret, error = false; |
510 | struct drm_fb_helper *helper; | |
511 | ||
512 | if (list_empty(&kernel_fb_helper_list)) | |
513 | return false; | |
514 | ||
515 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
516 | struct drm_device *dev = helper->dev; |
517 | ||
518 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
519 | continue; | |
520 | ||
dd908c86 | 521 | drm_modeset_lock_all(dev); |
3d9e35a9 | 522 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
523 | if (ret) |
524 | error = true; | |
cb597bb3 | 525 | drm_modeset_unlock_all(dev); |
785b93ef DA |
526 | } |
527 | return error; | |
528 | } | |
529 | ||
785b93ef DA |
530 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
531 | { | |
d21bf469 DV |
532 | bool ret; |
533 | ret = drm_fb_helper_force_kernel_mode(); | |
534 | if (ret == true) | |
535 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
536 | } |
537 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
538 | ||
1495cc9d | 539 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
540 | { |
541 | schedule_work(&drm_fb_helper_restore_work); | |
542 | } | |
543 | ||
544 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
545 | .handler = drm_fb_helper_sysrq, | |
546 | .help_msg = "force-fb(V)", | |
547 | .action_msg = "Restore framebuffer console", | |
548 | }; | |
b8c40d62 RD |
549 | #else |
550 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 551 | #endif |
785b93ef | 552 | |
3a8148c5 | 553 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
554 | { |
555 | struct drm_fb_helper *fb_helper = info->par; | |
556 | struct drm_device *dev = fb_helper->dev; | |
557 | struct drm_crtc *crtc; | |
023eb571 | 558 | struct drm_connector *connector; |
023eb571 | 559 | int i, j; |
785b93ef DA |
560 | |
561 | /* | |
3a8148c5 | 562 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 563 | */ |
84849903 | 564 | drm_modeset_lock_all(dev); |
20c60c35 DV |
565 | if (!drm_fb_helper_is_bound(fb_helper)) { |
566 | drm_modeset_unlock_all(dev); | |
567 | return; | |
568 | } | |
569 | ||
e87b2c42 | 570 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 571 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 572 | |
8be48d92 DA |
573 | if (!crtc->enabled) |
574 | continue; | |
575 | ||
3a8148c5 | 576 | /* Walk the connectors & encoders on this fb turning them on/off */ |
966a6a13 | 577 | drm_fb_helper_for_each_connector(fb_helper, j) { |
023eb571 | 578 | connector = fb_helper->connector_info[j]->connector; |
e04190e0 | 579 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 580 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 581 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 582 | } |
785b93ef | 583 | } |
84849903 | 584 | drm_modeset_unlock_all(dev); |
785b93ef DA |
585 | } |
586 | ||
207fd329 | 587 | /** |
6806cdf9 | 588 | * drm_fb_helper_blank - implementation for &fb_ops.fb_blank |
207fd329 DV |
589 | * @blank: desired blanking state |
590 | * @info: fbdev registered by the helper | |
591 | */ | |
785b93ef DA |
592 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
593 | { | |
c50bfd08 DV |
594 | if (oops_in_progress) |
595 | return -EBUSY; | |
596 | ||
785b93ef | 597 | switch (blank) { |
731b5a15 | 598 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 599 | case FB_BLANK_UNBLANK: |
3a8148c5 | 600 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 601 | break; |
731b5a15 | 602 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 603 | case FB_BLANK_NORMAL: |
3a8148c5 | 604 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 605 | break; |
731b5a15 | 606 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 607 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 608 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 609 | break; |
731b5a15 | 610 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 611 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 612 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 613 | break; |
731b5a15 | 614 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 615 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 616 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
617 | break; |
618 | } | |
619 | return 0; | |
620 | } | |
621 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
622 | ||
a2889606 VS |
623 | static void drm_fb_helper_modeset_release(struct drm_fb_helper *helper, |
624 | struct drm_mode_set *modeset) | |
625 | { | |
626 | int i; | |
627 | ||
628 | for (i = 0; i < modeset->num_connectors; i++) { | |
629 | drm_connector_unreference(modeset->connectors[i]); | |
630 | modeset->connectors[i] = NULL; | |
631 | } | |
632 | modeset->num_connectors = 0; | |
633 | ||
634 | drm_mode_destroy(helper->dev, modeset->mode); | |
635 | modeset->mode = NULL; | |
636 | ||
637 | /* FIXME should hold a ref? */ | |
638 | modeset->fb = NULL; | |
639 | } | |
640 | ||
785b93ef DA |
641 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) |
642 | { | |
643 | int i; | |
644 | ||
6e86d58b DA |
645 | for (i = 0; i < helper->connector_count; i++) { |
646 | drm_connector_unreference(helper->connector_info[i]->connector); | |
0b4c0f3f | 647 | kfree(helper->connector_info[i]); |
6e86d58b | 648 | } |
0b4c0f3f | 649 | kfree(helper->connector_info); |
a2889606 | 650 | |
a1b7736d | 651 | for (i = 0; i < helper->crtc_count; i++) { |
a2889606 VS |
652 | struct drm_mode_set *modeset = &helper->crtc_info[i].mode_set; |
653 | ||
654 | drm_fb_helper_modeset_release(helper, modeset); | |
655 | kfree(modeset->connectors); | |
a1b7736d | 656 | } |
785b93ef DA |
657 | kfree(helper->crtc_info); |
658 | } | |
659 | ||
cfe63423 NT |
660 | static void drm_fb_helper_resume_worker(struct work_struct *work) |
661 | { | |
662 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
663 | resume_work); | |
664 | ||
665 | console_lock(); | |
666 | fb_set_suspend(helper->fbdev, 0); | |
667 | console_unlock(); | |
668 | } | |
669 | ||
eaa434de NT |
670 | static void drm_fb_helper_dirty_work(struct work_struct *work) |
671 | { | |
672 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
673 | dirty_work); | |
674 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
675 | struct drm_clip_rect clip_copy; | |
676 | unsigned long flags; | |
677 | ||
678 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
679 | clip_copy = *clip; | |
680 | clip->x1 = clip->y1 = ~0; | |
681 | clip->x2 = clip->y2 = 0; | |
682 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
683 | ||
87d3b658 TI |
684 | /* call dirty callback only when it has been really touched */ |
685 | if (clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2) | |
686 | helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); | |
eaa434de NT |
687 | } |
688 | ||
10a23102 TR |
689 | /** |
690 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
691 | * @dev: DRM device | |
692 | * @helper: driver-allocated fbdev helper structure to set up | |
693 | * @funcs: pointer to structure of functions associate with this helper | |
694 | * | |
695 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
696 | * useful to implement race-free initialization of the polling helpers. | |
697 | */ | |
698 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
699 | const struct drm_fb_helper_funcs *funcs) | |
700 | { | |
701 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
eaa434de | 702 | spin_lock_init(&helper->dirty_lock); |
cfe63423 | 703 | INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker); |
eaa434de NT |
704 | INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work); |
705 | helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0; | |
10a23102 TR |
706 | helper->funcs = funcs; |
707 | helper->dev = dev; | |
708 | } | |
709 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
710 | ||
207fd329 DV |
711 | /** |
712 | * drm_fb_helper_init - initialize a drm_fb_helper structure | |
713 | * @dev: drm device | |
714 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
207fd329 DV |
715 | * @max_conn_count: max connector count |
716 | * | |
717 | * This allocates the structures for the fbdev helper with the given limits. | |
718 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
719 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
720 | * to allow driver writes more control over the exact init sequence. | |
721 | * | |
10a23102 | 722 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
723 | * |
724 | * RETURNS: | |
725 | * Zero if everything went ok, nonzero otherwise. | |
726 | */ | |
4abe3520 DA |
727 | int drm_fb_helper_init(struct drm_device *dev, |
728 | struct drm_fb_helper *fb_helper, | |
e4563f6b | 729 | int max_conn_count) |
785b93ef | 730 | { |
785b93ef | 731 | struct drm_crtc *crtc; |
e4563f6b | 732 | struct drm_mode_config *config = &dev->mode_config; |
785b93ef DA |
733 | int i; |
734 | ||
f64c5573 DV |
735 | if (!drm_fbdev_emulation) |
736 | return 0; | |
737 | ||
04cfe97e XL |
738 | if (!max_conn_count) |
739 | return -EINVAL; | |
740 | ||
e4563f6b | 741 | fb_helper->crtc_info = kcalloc(config->num_crtc, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
4abe3520 | 742 | if (!fb_helper->crtc_info) |
785b93ef DA |
743 | return -ENOMEM; |
744 | ||
e4563f6b | 745 | fb_helper->crtc_count = config->num_crtc; |
4abe3520 DA |
746 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); |
747 | if (!fb_helper->connector_info) { | |
748 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
749 | return -ENOMEM; |
750 | } | |
65c2a89c | 751 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 752 | fb_helper->connector_count = 0; |
785b93ef | 753 | |
e4563f6b | 754 | for (i = 0; i < fb_helper->crtc_count; i++) { |
4abe3520 | 755 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
756 | kcalloc(max_conn_count, |
757 | sizeof(struct drm_connector *), | |
758 | GFP_KERNEL); | |
759 | ||
4a1b0714 | 760 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 761 | goto out_free; |
4abe3520 | 762 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
763 | } |
764 | ||
765 | i = 0; | |
6295d607 | 766 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 767 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
768 | i++; |
769 | } | |
e9ad3181 | 770 | |
785b93ef DA |
771 | return 0; |
772 | out_free: | |
4abe3520 | 773 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
774 | return -ENOMEM; |
775 | } | |
4abe3520 DA |
776 | EXPORT_SYMBOL(drm_fb_helper_init); |
777 | ||
b8017d6c AT |
778 | /** |
779 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
780 | * @fb_helper: driver-allocated fbdev helper | |
781 | * | |
782 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
783 | * by the driver within the fb_probe fb_helper callback function. | |
784 | * | |
785 | * RETURNS: | |
786 | * fb_info pointer if things went okay, pointer containing error code | |
787 | * otherwise | |
788 | */ | |
789 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
790 | { | |
791 | struct device *dev = fb_helper->dev->dev; | |
792 | struct fb_info *info; | |
793 | int ret; | |
794 | ||
795 | info = framebuffer_alloc(0, dev); | |
796 | if (!info) | |
797 | return ERR_PTR(-ENOMEM); | |
798 | ||
799 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
800 | if (ret) | |
801 | goto err_release; | |
802 | ||
803 | info->apertures = alloc_apertures(1); | |
804 | if (!info->apertures) { | |
805 | ret = -ENOMEM; | |
806 | goto err_free_cmap; | |
807 | } | |
808 | ||
809 | fb_helper->fbdev = info; | |
810 | ||
811 | return info; | |
812 | ||
813 | err_free_cmap: | |
814 | fb_dealloc_cmap(&info->cmap); | |
815 | err_release: | |
816 | framebuffer_release(info); | |
817 | return ERR_PTR(ret); | |
818 | } | |
819 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
820 | ||
821 | /** | |
822 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
823 | * @fb_helper: driver-allocated fbdev helper | |
824 | * | |
825 | * A wrapper around unregister_framebuffer, to release the fb_info | |
826 | * framebuffer device | |
827 | */ | |
828 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
829 | { | |
830 | if (fb_helper && fb_helper->fbdev) | |
831 | unregister_framebuffer(fb_helper->fbdev); | |
832 | } | |
833 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
834 | ||
835 | /** | |
836 | * drm_fb_helper_release_fbi - dealloc fb_info and its members | |
837 | * @fb_helper: driver-allocated fbdev helper | |
838 | * | |
839 | * A helper to free memory taken by fb_info and the members cmap and | |
840 | * apertures | |
841 | */ | |
842 | void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper) | |
843 | { | |
844 | if (fb_helper) { | |
845 | struct fb_info *info = fb_helper->fbdev; | |
846 | ||
847 | if (info) { | |
848 | if (info->cmap.len) | |
849 | fb_dealloc_cmap(&info->cmap); | |
850 | framebuffer_release(info); | |
851 | } | |
852 | ||
853 | fb_helper->fbdev = NULL; | |
854 | } | |
855 | } | |
856 | EXPORT_SYMBOL(drm_fb_helper_release_fbi); | |
857 | ||
4abe3520 DA |
858 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
859 | { | |
f64c5573 DV |
860 | if (!drm_fbdev_emulation) |
861 | return; | |
862 | ||
24f76b2c | 863 | cancel_work_sync(&fb_helper->resume_work); |
f21b9a92 CW |
864 | cancel_work_sync(&fb_helper->dirty_work); |
865 | ||
a53ca635 | 866 | mutex_lock(&kernel_fb_helper_lock); |
4abe3520 DA |
867 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
868 | list_del(&fb_helper->kernel_fb_list); | |
869 | if (list_empty(&kernel_fb_helper_list)) { | |
4abe3520 DA |
870 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
871 | } | |
872 | } | |
a53ca635 | 873 | mutex_unlock(&kernel_fb_helper_lock); |
4abe3520 DA |
874 | |
875 | drm_fb_helper_crtc_free(fb_helper); | |
876 | ||
4abe3520 DA |
877 | } |
878 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 879 | |
47074ab7 AT |
880 | /** |
881 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
882 | * @fb_helper: driver-allocated fbdev helper | |
883 | * | |
884 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
885 | */ | |
886 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
887 | { | |
888 | if (fb_helper && fb_helper->fbdev) | |
889 | unlink_framebuffer(fb_helper->fbdev); | |
890 | } | |
891 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
892 | ||
eaa434de NT |
893 | static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y, |
894 | u32 width, u32 height) | |
895 | { | |
896 | struct drm_fb_helper *helper = info->par; | |
897 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
898 | unsigned long flags; | |
899 | ||
900 | if (!helper->fb->funcs->dirty) | |
901 | return; | |
902 | ||
903 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
904 | clip->x1 = min_t(u32, clip->x1, x); | |
905 | clip->y1 = min_t(u32, clip->y1, y); | |
906 | clip->x2 = max_t(u32, clip->x2, x + width); | |
907 | clip->y2 = max_t(u32, clip->y2, y + height); | |
908 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
909 | ||
910 | schedule_work(&helper->dirty_work); | |
911 | } | |
912 | ||
913 | /** | |
914 | * drm_fb_helper_deferred_io() - fbdev deferred_io callback function | |
915 | * @info: fb_info struct pointer | |
916 | * @pagelist: list of dirty mmap framebuffer pages | |
917 | * | |
6806cdf9 | 918 | * This function is used as the &fb_deferred_io.deferred_io |
eaa434de NT |
919 | * callback function for flushing the fbdev mmap writes. |
920 | */ | |
921 | void drm_fb_helper_deferred_io(struct fb_info *info, | |
922 | struct list_head *pagelist) | |
923 | { | |
924 | unsigned long start, end, min, max; | |
925 | struct page *page; | |
926 | u32 y1, y2; | |
927 | ||
928 | min = ULONG_MAX; | |
929 | max = 0; | |
930 | list_for_each_entry(page, pagelist, lru) { | |
931 | start = page->index << PAGE_SHIFT; | |
932 | end = start + PAGE_SIZE - 1; | |
933 | min = min(min, start); | |
934 | max = max(max, end); | |
935 | } | |
936 | ||
937 | if (min < max) { | |
938 | y1 = min / info->fix.line_length; | |
939 | y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length), | |
940 | info->var.yres); | |
941 | drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1); | |
942 | } | |
943 | } | |
944 | EXPORT_SYMBOL(drm_fb_helper_deferred_io); | |
945 | ||
cbb1a82e AT |
946 | /** |
947 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
948 | * @info: fb_info struct pointer | |
949 | * @buf: userspace buffer to read from framebuffer memory | |
950 | * @count: number of bytes to read from framebuffer memory | |
951 | * @ppos: read offset within framebuffer memory | |
952 | * | |
953 | * A wrapper around fb_sys_read implemented by fbdev core | |
954 | */ | |
955 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
956 | size_t count, loff_t *ppos) | |
957 | { | |
958 | return fb_sys_read(info, buf, count, ppos); | |
959 | } | |
960 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
961 | ||
962 | /** | |
963 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
964 | * @info: fb_info struct pointer | |
965 | * @buf: userspace buffer to write to framebuffer memory | |
966 | * @count: number of bytes to write to framebuffer memory | |
967 | * @ppos: write offset within framebuffer memory | |
968 | * | |
969 | * A wrapper around fb_sys_write implemented by fbdev core | |
970 | */ | |
971 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
972 | size_t count, loff_t *ppos) | |
973 | { | |
eaa434de NT |
974 | ssize_t ret; |
975 | ||
976 | ret = fb_sys_write(info, buf, count, ppos); | |
977 | if (ret > 0) | |
978 | drm_fb_helper_dirty(info, 0, 0, info->var.xres, | |
979 | info->var.yres); | |
980 | ||
981 | return ret; | |
cbb1a82e AT |
982 | } |
983 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
984 | ||
742547b7 AT |
985 | /** |
986 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
987 | * @info: fbdev registered by the helper | |
988 | * @rect: info about rectangle to fill | |
989 | * | |
990 | * A wrapper around sys_fillrect implemented by fbdev core | |
991 | */ | |
992 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
993 | const struct fb_fillrect *rect) | |
994 | { | |
995 | sys_fillrect(info, rect); | |
eaa434de NT |
996 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
997 | rect->width, rect->height); | |
742547b7 AT |
998 | } |
999 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
1000 | ||
1001 | /** | |
1002 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
1003 | * @info: fbdev registered by the helper | |
1004 | * @area: info about area to copy | |
1005 | * | |
1006 | * A wrapper around sys_copyarea implemented by fbdev core | |
1007 | */ | |
1008 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
1009 | const struct fb_copyarea *area) | |
1010 | { | |
1011 | sys_copyarea(info, area); | |
eaa434de NT |
1012 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1013 | area->width, area->height); | |
742547b7 AT |
1014 | } |
1015 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
1016 | ||
1017 | /** | |
1018 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
1019 | * @info: fbdev registered by the helper | |
1020 | * @image: info about image to blit | |
1021 | * | |
1022 | * A wrapper around sys_imageblit implemented by fbdev core | |
1023 | */ | |
1024 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
1025 | const struct fb_image *image) | |
1026 | { | |
1027 | sys_imageblit(info, image); | |
eaa434de NT |
1028 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1029 | image->width, image->height); | |
742547b7 AT |
1030 | } |
1031 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
1032 | ||
1033 | /** | |
1034 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
1035 | * @info: fbdev registered by the helper | |
1036 | * @rect: info about rectangle to fill | |
1037 | * | |
1038 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1039 | */ | |
1040 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
1041 | const struct fb_fillrect *rect) | |
1042 | { | |
1043 | cfb_fillrect(info, rect); | |
eaa434de NT |
1044 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
1045 | rect->width, rect->height); | |
742547b7 AT |
1046 | } |
1047 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
1048 | ||
1049 | /** | |
1050 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
1051 | * @info: fbdev registered by the helper | |
1052 | * @area: info about area to copy | |
1053 | * | |
1054 | * A wrapper around cfb_copyarea implemented by fbdev core | |
1055 | */ | |
1056 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
1057 | const struct fb_copyarea *area) | |
1058 | { | |
1059 | cfb_copyarea(info, area); | |
eaa434de NT |
1060 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1061 | area->width, area->height); | |
742547b7 AT |
1062 | } |
1063 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
1064 | ||
1065 | /** | |
1066 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
1067 | * @info: fbdev registered by the helper | |
1068 | * @image: info about image to blit | |
1069 | * | |
1070 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1071 | */ | |
1072 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
1073 | const struct fb_image *image) | |
1074 | { | |
1075 | cfb_imageblit(info, image); | |
eaa434de NT |
1076 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1077 | image->width, image->height); | |
742547b7 AT |
1078 | } |
1079 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
1080 | ||
fdefa58a AT |
1081 | /** |
1082 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
1083 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1084 | * @suspend: whether to suspend or resume |
fdefa58a | 1085 | * |
cfe63423 NT |
1086 | * A wrapper around fb_set_suspend implemented by fbdev core. |
1087 | * Use drm_fb_helper_set_suspend_unlocked() if you don't need to take | |
1088 | * the lock yourself | |
fdefa58a | 1089 | */ |
28579f37 | 1090 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend) |
fdefa58a AT |
1091 | { |
1092 | if (fb_helper && fb_helper->fbdev) | |
28579f37 | 1093 | fb_set_suspend(fb_helper->fbdev, suspend); |
fdefa58a AT |
1094 | } |
1095 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
1096 | ||
cfe63423 NT |
1097 | /** |
1098 | * drm_fb_helper_set_suspend_unlocked - wrapper around fb_set_suspend that also | |
1099 | * takes the console lock | |
1100 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1101 | * @suspend: whether to suspend or resume |
cfe63423 NT |
1102 | * |
1103 | * A wrapper around fb_set_suspend() that takes the console lock. If the lock | |
1104 | * isn't available on resume, a worker is tasked with waiting for the lock | |
1105 | * to become available. The console lock can be pretty contented on resume | |
1106 | * due to all the printk activity. | |
1107 | * | |
1108 | * This function can be called multiple times with the same state since | |
6806cdf9 | 1109 | * &fb_info.state is checked to see if fbdev is running or not before locking. |
cfe63423 NT |
1110 | * |
1111 | * Use drm_fb_helper_set_suspend() if you need to take the lock yourself. | |
1112 | */ | |
1113 | void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, | |
28579f37 | 1114 | bool suspend) |
cfe63423 NT |
1115 | { |
1116 | if (!fb_helper || !fb_helper->fbdev) | |
1117 | return; | |
1118 | ||
1119 | /* make sure there's no pending/ongoing resume */ | |
1120 | flush_work(&fb_helper->resume_work); | |
1121 | ||
1122 | if (suspend) { | |
1123 | if (fb_helper->fbdev->state != FBINFO_STATE_RUNNING) | |
1124 | return; | |
1125 | ||
1126 | console_lock(); | |
1127 | ||
1128 | } else { | |
1129 | if (fb_helper->fbdev->state == FBINFO_STATE_RUNNING) | |
1130 | return; | |
1131 | ||
1132 | if (!console_trylock()) { | |
1133 | schedule_work(&fb_helper->resume_work); | |
1134 | return; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | fb_set_suspend(fb_helper->fbdev, suspend); | |
1139 | console_unlock(); | |
1140 | } | |
1141 | EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked); | |
1142 | ||
c850cb78 | 1143 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
1144 | u16 blue, u16 regno, struct fb_info *info) |
1145 | { | |
1146 | struct drm_fb_helper *fb_helper = info->par; | |
1147 | struct drm_framebuffer *fb = fb_helper->fb; | |
b8c00ac5 | 1148 | |
c850cb78 DA |
1149 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
1150 | u32 *palette; | |
1151 | u32 value; | |
1152 | /* place color in psuedopalette */ | |
1153 | if (regno > 16) | |
1154 | return -EINVAL; | |
1155 | palette = (u32 *)info->pseudo_palette; | |
1156 | red >>= (16 - info->var.red.length); | |
1157 | green >>= (16 - info->var.green.length); | |
1158 | blue >>= (16 - info->var.blue.length); | |
1159 | value = (red << info->var.red.offset) | | |
1160 | (green << info->var.green.offset) | | |
1161 | (blue << info->var.blue.offset); | |
9da12b6a RC |
1162 | if (info->var.transp.length > 0) { |
1163 | u32 mask = (1 << info->var.transp.length) - 1; | |
1164 | mask <<= info->var.transp.offset; | |
1165 | value |= mask; | |
1166 | } | |
c850cb78 DA |
1167 | palette[regno] = value; |
1168 | return 0; | |
1169 | } | |
1170 | ||
04c0c569 VS |
1171 | /* |
1172 | * The driver really shouldn't advertise pseudo/directcolor | |
1173 | * visuals if it can't deal with the palette. | |
1174 | */ | |
1175 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1176 | !fb_helper->funcs->gamma_get)) | |
1177 | return -EINVAL; | |
1178 | ||
272725c7 | 1179 | WARN_ON(fb->format->cpp[0] != 1); |
b8c00ac5 | 1180 | |
fef1480d | 1181 | fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); |
b8c00ac5 | 1182 | |
c850cb78 | 1183 | return 0; |
b8c00ac5 DA |
1184 | } |
1185 | ||
207fd329 | 1186 | /** |
6806cdf9 | 1187 | * drm_fb_helper_setcmap - implementation for &fb_ops.fb_setcmap |
207fd329 DV |
1188 | * @cmap: cmap to set |
1189 | * @info: fbdev registered by the helper | |
1190 | */ | |
068143d3 DA |
1191 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1192 | { | |
1193 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1194 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1195 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1196 | u16 *red, *green, *blue, *transp; |
1197 | struct drm_crtc *crtc; | |
062ac622 | 1198 | int i, j, rc = 0; |
068143d3 DA |
1199 | int start; |
1200 | ||
c50bfd08 | 1201 | if (oops_in_progress) |
9aa609e1 | 1202 | return -EBUSY; |
c50bfd08 DV |
1203 | |
1204 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1205 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1206 | drm_modeset_unlock_all(dev); | |
1207 | return -EBUSY; | |
1208 | } | |
1209 | ||
8be48d92 DA |
1210 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1211 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1212 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1213 | |
1214 | red = cmap->red; | |
1215 | green = cmap->green; | |
1216 | blue = cmap->blue; | |
1217 | transp = cmap->transp; | |
1218 | start = cmap->start; | |
1219 | ||
062ac622 | 1220 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1221 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1222 | ||
1223 | hred = *red++; | |
1224 | hgreen = *green++; | |
1225 | hblue = *blue++; | |
1226 | ||
1227 | if (transp) | |
1228 | htransp = *transp++; | |
1229 | ||
c850cb78 DA |
1230 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1231 | if (rc) | |
8391a3d5 | 1232 | goto out; |
068143d3 | 1233 | } |
04c0c569 VS |
1234 | if (crtc_funcs->load_lut) |
1235 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1236 | } |
8391a3d5 VS |
1237 | out: |
1238 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1239 | return rc; |
1240 | } | |
1241 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1242 | ||
207fd329 | 1243 | /** |
6806cdf9 | 1244 | * drm_fb_helper_check_var - implementation for &fb_ops.fb_check_var |
207fd329 DV |
1245 | * @var: screeninfo to check |
1246 | * @info: fbdev registered by the helper | |
1247 | */ | |
785b93ef DA |
1248 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1249 | struct fb_info *info) | |
1250 | { | |
1251 | struct drm_fb_helper *fb_helper = info->par; | |
1252 | struct drm_framebuffer *fb = fb_helper->fb; | |
1253 | int depth; | |
1254 | ||
f90ebd9e | 1255 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1256 | return -EINVAL; |
1257 | ||
865afb11 SA |
1258 | /* |
1259 | * Changes struct fb_var_screeninfo are currently not pushed back | |
1260 | * to KMS, hence fail if different settings are requested. | |
1261 | */ | |
272725c7 | 1262 | if (var->bits_per_pixel != fb->format->cpp[0] * 8 || |
865afb11 SA |
1263 | var->xres != fb->width || var->yres != fb->height || |
1264 | var->xres_virtual != fb->width || var->yres_virtual != fb->height) { | |
1265 | DRM_DEBUG("fb userspace requested width/height/bpp different than current fb " | |
62fb376e CW |
1266 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1267 | var->xres, var->yres, var->bits_per_pixel, | |
1268 | var->xres_virtual, var->yres_virtual, | |
272725c7 | 1269 | fb->width, fb->height, fb->format->cpp[0] * 8); |
785b93ef DA |
1270 | return -EINVAL; |
1271 | } | |
1272 | ||
1273 | switch (var->bits_per_pixel) { | |
1274 | case 16: | |
1275 | depth = (var->green.length == 6) ? 16 : 15; | |
1276 | break; | |
1277 | case 32: | |
1278 | depth = (var->transp.length > 0) ? 32 : 24; | |
1279 | break; | |
1280 | default: | |
1281 | depth = var->bits_per_pixel; | |
1282 | break; | |
1283 | } | |
1284 | ||
1285 | switch (depth) { | |
1286 | case 8: | |
1287 | var->red.offset = 0; | |
1288 | var->green.offset = 0; | |
1289 | var->blue.offset = 0; | |
1290 | var->red.length = 8; | |
1291 | var->green.length = 8; | |
1292 | var->blue.length = 8; | |
1293 | var->transp.length = 0; | |
1294 | var->transp.offset = 0; | |
1295 | break; | |
1296 | case 15: | |
1297 | var->red.offset = 10; | |
1298 | var->green.offset = 5; | |
1299 | var->blue.offset = 0; | |
1300 | var->red.length = 5; | |
1301 | var->green.length = 5; | |
1302 | var->blue.length = 5; | |
1303 | var->transp.length = 1; | |
1304 | var->transp.offset = 15; | |
1305 | break; | |
1306 | case 16: | |
1307 | var->red.offset = 11; | |
1308 | var->green.offset = 5; | |
1309 | var->blue.offset = 0; | |
1310 | var->red.length = 5; | |
1311 | var->green.length = 6; | |
1312 | var->blue.length = 5; | |
1313 | var->transp.length = 0; | |
1314 | var->transp.offset = 0; | |
1315 | break; | |
1316 | case 24: | |
1317 | var->red.offset = 16; | |
1318 | var->green.offset = 8; | |
1319 | var->blue.offset = 0; | |
1320 | var->red.length = 8; | |
1321 | var->green.length = 8; | |
1322 | var->blue.length = 8; | |
1323 | var->transp.length = 0; | |
1324 | var->transp.offset = 0; | |
1325 | break; | |
1326 | case 32: | |
1327 | var->red.offset = 16; | |
1328 | var->green.offset = 8; | |
1329 | var->blue.offset = 0; | |
1330 | var->red.length = 8; | |
1331 | var->green.length = 8; | |
1332 | var->blue.length = 8; | |
1333 | var->transp.length = 8; | |
1334 | var->transp.offset = 24; | |
1335 | break; | |
1336 | default: | |
1337 | return -EINVAL; | |
1338 | } | |
1339 | return 0; | |
1340 | } | |
1341 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1342 | ||
207fd329 | 1343 | /** |
6806cdf9 | 1344 | * drm_fb_helper_set_par - implementation for &fb_ops.fb_set_par |
207fd329 DV |
1345 | * @info: fbdev registered by the helper |
1346 | * | |
1347 | * This will let fbcon do the mode init and is called at initialization time by | |
1348 | * the fbdev core when registering the driver, and later on through the hotplug | |
1349 | * callback. | |
1350 | */ | |
785b93ef DA |
1351 | int drm_fb_helper_set_par(struct fb_info *info) |
1352 | { | |
1353 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1354 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1355 | |
c50bfd08 DV |
1356 | if (oops_in_progress) |
1357 | return -EBUSY; | |
1358 | ||
5349ef31 | 1359 | if (var->pixclock != 0) { |
172e91f5 | 1360 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1361 | return -EINVAL; |
1362 | } | |
1363 | ||
5ea1f752 | 1364 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1365 | |
785b93ef DA |
1366 | return 0; |
1367 | } | |
1368 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1369 | ||
1edf0269 | 1370 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1371 | struct fb_info *info) |
1edf0269 RC |
1372 | { |
1373 | struct drm_fb_helper *fb_helper = info->par; | |
1374 | struct drm_device *dev = fb_helper->dev; | |
1375 | struct drm_atomic_state *state; | |
07d3bad6 | 1376 | struct drm_plane *plane; |
1edf0269 | 1377 | int i, ret; |
07d3bad6 | 1378 | unsigned plane_mask; |
1edf0269 RC |
1379 | |
1380 | state = drm_atomic_state_alloc(dev); | |
1381 | if (!state) | |
1382 | return -ENOMEM; | |
1383 | ||
1384 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1385 | retry: | |
07d3bad6 | 1386 | plane_mask = 0; |
1edf0269 RC |
1387 | for(i = 0; i < fb_helper->crtc_count; i++) { |
1388 | struct drm_mode_set *mode_set; | |
1389 | ||
1390 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1391 | ||
1392 | mode_set->x = var->xoffset; | |
1393 | mode_set->y = var->yoffset; | |
1394 | ||
1395 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1396 | if (ret != 0) | |
1397 | goto fail; | |
07d3bad6 ML |
1398 | |
1399 | plane = mode_set->crtc->primary; | |
7118fd9b | 1400 | plane_mask |= (1 << drm_plane_index(plane)); |
07d3bad6 | 1401 | plane->old_fb = plane->fb; |
1edf0269 RC |
1402 | } |
1403 | ||
1404 | ret = drm_atomic_commit(state); | |
1405 | if (ret != 0) | |
1406 | goto fail; | |
1407 | ||
1408 | info->var.xoffset = var->xoffset; | |
1409 | info->var.yoffset = var->yoffset; | |
1410 | ||
1edf0269 | 1411 | fail: |
07d3bad6 | 1412 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
a0fb6ad7 | 1413 | |
1edf0269 RC |
1414 | if (ret == -EDEADLK) |
1415 | goto backoff; | |
1416 | ||
0853695c | 1417 | drm_atomic_state_put(state); |
1edf0269 RC |
1418 | return ret; |
1419 | ||
1420 | backoff: | |
1421 | drm_atomic_state_clear(state); | |
1422 | drm_atomic_legacy_backoff(state); | |
1423 | ||
1424 | goto retry; | |
1425 | } | |
1426 | ||
207fd329 | 1427 | /** |
6806cdf9 | 1428 | * drm_fb_helper_pan_display - implementation for &fb_ops.fb_pan_display |
207fd329 DV |
1429 | * @var: updated screen information |
1430 | * @info: fbdev registered by the helper | |
1431 | */ | |
785b93ef DA |
1432 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1433 | struct fb_info *info) | |
1434 | { | |
1435 | struct drm_fb_helper *fb_helper = info->par; | |
1436 | struct drm_device *dev = fb_helper->dev; | |
1437 | struct drm_mode_set *modeset; | |
785b93ef DA |
1438 | int ret = 0; |
1439 | int i; | |
1440 | ||
c50bfd08 | 1441 | if (oops_in_progress) |
9aa609e1 | 1442 | return -EBUSY; |
c50bfd08 DV |
1443 | |
1444 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1445 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1446 | drm_modeset_unlock_all(dev); | |
1447 | return -EBUSY; | |
1448 | } | |
1449 | ||
a743d758 | 1450 | if (drm_drv_uses_atomic_modeset(dev)) { |
1edf0269 RC |
1451 | ret = pan_display_atomic(var, info); |
1452 | goto unlock; | |
1453 | } | |
1454 | ||
8be48d92 | 1455 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1456 | modeset = &fb_helper->crtc_info[i].mode_set; |
1457 | ||
1458 | modeset->x = var->xoffset; | |
1459 | modeset->y = var->yoffset; | |
1460 | ||
1461 | if (modeset->num_connectors) { | |
2d13b679 | 1462 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1463 | if (!ret) { |
1464 | info->var.xoffset = var->xoffset; | |
1465 | info->var.yoffset = var->yoffset; | |
1466 | } | |
1467 | } | |
1468 | } | |
1edf0269 | 1469 | unlock: |
84849903 | 1470 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1471 | return ret; |
1472 | } | |
1473 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1474 | ||
8acf658a | 1475 | /* |
207fd329 DV |
1476 | * Allocates the backing storage and sets up the fbdev info structure through |
1477 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1478 | * notifier. | |
8acf658a | 1479 | */ |
de1ace5b DV |
1480 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1481 | int preferred_bpp) | |
785b93ef | 1482 | { |
8acf658a | 1483 | int ret = 0; |
785b93ef | 1484 | int crtc_count = 0; |
4abe3520 | 1485 | int i; |
38651674 | 1486 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1487 | int gamma_size = 0; |
38651674 DA |
1488 | |
1489 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1490 | sizes.surface_depth = 24; | |
1491 | sizes.surface_bpp = 32; | |
1492 | sizes.fb_width = (unsigned)-1; | |
1493 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 1494 | |
b8c00ac5 DA |
1495 | /* if driver picks 8 or 16 by default use that |
1496 | for both depth/bpp */ | |
96081cdf | 1497 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1498 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1499 | |
785b93ef | 1500 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
966a6a13 | 1501 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1502 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; |
1794d257 | 1503 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1504 | |
eaf99c74 | 1505 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1506 | |
1507 | if (cmdline_mode->bpp_specified) { | |
1508 | switch (cmdline_mode->bpp) { | |
1509 | case 8: | |
38651674 | 1510 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1511 | break; |
1512 | case 15: | |
38651674 DA |
1513 | sizes.surface_depth = 15; |
1514 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1515 | break; |
1516 | case 16: | |
38651674 | 1517 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1518 | break; |
1519 | case 24: | |
38651674 | 1520 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1521 | break; |
1522 | case 32: | |
38651674 DA |
1523 | sizes.surface_depth = 24; |
1524 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1525 | break; |
1526 | } | |
1527 | break; | |
1528 | } | |
1529 | } | |
1530 | ||
8be48d92 DA |
1531 | crtc_count = 0; |
1532 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1533 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1534 | struct drm_mode_set *mode_set; |
1535 | int x, y, j; | |
1536 | /* in case of tile group, are we the last tile vert or horiz? | |
1537 | * If no tile group you are always the last one both vertically | |
1538 | * and horizontally | |
1539 | */ | |
1540 | bool lastv = true, lasth = true; | |
675c8328 | 1541 | |
8be48d92 | 1542 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1543 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1544 | |
1545 | if (!desired_mode) | |
1546 | continue; | |
1547 | ||
1548 | crtc_count++; | |
1549 | ||
b0ee9e7f DA |
1550 | x = fb_helper->crtc_info[i].x; |
1551 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1552 | |
1553 | if (gamma_size == 0) | |
1554 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1555 | ||
1556 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1557 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1558 | |
1559 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1560 | struct drm_connector *connector = mode_set->connectors[j]; | |
1561 | if (connector->has_tile) { | |
1562 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1563 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1564 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1565 | break; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | if (lasth) | |
1570 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1571 | if (lastv) | |
1572 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1573 | } |
1574 | ||
38651674 | 1575 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
1576 | /* hmm everyone went away - assume VGA cable just fell out |
1577 | and will come back later. */ | |
eb1f8e4f | 1578 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1579 | sizes.fb_width = sizes.surface_width = 1024; |
1580 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1581 | } |
1582 | ||
38651674 | 1583 | /* push down into drivers */ |
8acf658a DV |
1584 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1585 | if (ret < 0) | |
1586 | return ret; | |
785b93ef | 1587 | |
7e53f3a4 DV |
1588 | /* |
1589 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1590 | * events, but at init time drm_setup_crtcs needs to be called before | |
1591 | * the fb is allocated (since we need to figure out the desired size of | |
1592 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1593 | * here again. | |
1594 | */ | |
96081cdf | 1595 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1596 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1597 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1598 | ||
785b93ef DA |
1599 | return 0; |
1600 | } | |
785b93ef | 1601 | |
207fd329 DV |
1602 | /** |
1603 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1604 | * @info: fbdev registered by the helper | |
1605 | * @pitch: desired pitch | |
1606 | * @depth: desired depth | |
1607 | * | |
1608 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1609 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1610 | * additional constraints need to set up their own limits. | |
1611 | * | |
1612 | * Drivers should call this (or their equivalent setup code) from their | |
6806cdf9 | 1613 | * &drm_fb_helper_funcs.fb_probe callback. |
207fd329 | 1614 | */ |
3632ef89 DA |
1615 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1616 | uint32_t depth) | |
1617 | { | |
1618 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1619 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1620 | FB_VISUAL_TRUECOLOR; | |
1621 | info->fix.mmio_start = 0; | |
1622 | info->fix.mmio_len = 0; | |
1623 | info->fix.type_aux = 0; | |
1624 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1625 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1626 | info->fix.ywrapstep = 0; | |
1627 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1628 | |
1629 | info->fix.line_length = pitch; | |
1630 | return; | |
1631 | } | |
1632 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1633 | ||
207fd329 DV |
1634 | /** |
1635 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1636 | * @info: fbdev instance to set up | |
1637 | * @fb_helper: fb helper instance to use as template | |
1638 | * @fb_width: desired fb width | |
1639 | * @fb_height: desired fb height | |
1640 | * | |
1641 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
6806cdf9 | 1642 | * and the drm framebuffer allocated in &drm_fb_helper.fb. |
207fd329 DV |
1643 | * |
1644 | * Drivers should call this (or their equivalent setup code) from their | |
6806cdf9 DV |
1645 | * &drm_fb_helper_funcs.fb_probe callback after having allocated the fbdev |
1646 | * backing storage framebuffer. | |
207fd329 | 1647 | */ |
38651674 | 1648 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1649 | uint32_t fb_width, uint32_t fb_height) |
1650 | { | |
38651674 DA |
1651 | struct drm_framebuffer *fb = fb_helper->fb; |
1652 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
1653 | info->var.xres_virtual = fb->width; |
1654 | info->var.yres_virtual = fb->height; | |
272725c7 | 1655 | info->var.bits_per_pixel = fb->format->cpp[0] * 8; |
57084d05 | 1656 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1657 | info->var.xoffset = 0; |
1658 | info->var.yoffset = 0; | |
1659 | info->var.activate = FB_ACTIVATE_NOW; | |
1660 | info->var.height = -1; | |
1661 | info->var.width = -1; | |
1662 | ||
b00c600e | 1663 | switch (fb->format->depth) { |
785b93ef DA |
1664 | case 8: |
1665 | info->var.red.offset = 0; | |
1666 | info->var.green.offset = 0; | |
1667 | info->var.blue.offset = 0; | |
1668 | info->var.red.length = 8; /* 8bit DAC */ | |
1669 | info->var.green.length = 8; | |
1670 | info->var.blue.length = 8; | |
1671 | info->var.transp.offset = 0; | |
1672 | info->var.transp.length = 0; | |
1673 | break; | |
1674 | case 15: | |
1675 | info->var.red.offset = 10; | |
1676 | info->var.green.offset = 5; | |
1677 | info->var.blue.offset = 0; | |
1678 | info->var.red.length = 5; | |
1679 | info->var.green.length = 5; | |
1680 | info->var.blue.length = 5; | |
1681 | info->var.transp.offset = 15; | |
1682 | info->var.transp.length = 1; | |
1683 | break; | |
1684 | case 16: | |
1685 | info->var.red.offset = 11; | |
1686 | info->var.green.offset = 5; | |
1687 | info->var.blue.offset = 0; | |
1688 | info->var.red.length = 5; | |
1689 | info->var.green.length = 6; | |
1690 | info->var.blue.length = 5; | |
1691 | info->var.transp.offset = 0; | |
1692 | break; | |
1693 | case 24: | |
1694 | info->var.red.offset = 16; | |
1695 | info->var.green.offset = 8; | |
1696 | info->var.blue.offset = 0; | |
1697 | info->var.red.length = 8; | |
1698 | info->var.green.length = 8; | |
1699 | info->var.blue.length = 8; | |
1700 | info->var.transp.offset = 0; | |
1701 | info->var.transp.length = 0; | |
1702 | break; | |
1703 | case 32: | |
1704 | info->var.red.offset = 16; | |
1705 | info->var.green.offset = 8; | |
1706 | info->var.blue.offset = 0; | |
1707 | info->var.red.length = 8; | |
1708 | info->var.green.length = 8; | |
1709 | info->var.blue.length = 8; | |
1710 | info->var.transp.offset = 24; | |
1711 | info->var.transp.length = 8; | |
1712 | break; | |
1713 | default: | |
1714 | break; | |
1715 | } | |
1716 | ||
1717 | info->var.xres = fb_width; | |
1718 | info->var.yres = fb_height; | |
1719 | } | |
1720 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1721 | |
0b4c0f3f DA |
1722 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1723 | uint32_t maxX, | |
1724 | uint32_t maxY) | |
38651674 DA |
1725 | { |
1726 | struct drm_connector *connector; | |
1727 | int count = 0; | |
0b4c0f3f | 1728 | int i; |
38651674 | 1729 | |
966a6a13 | 1730 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1731 | connector = fb_helper->connector_info[i]->connector; |
38651674 DA |
1732 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1733 | } | |
1734 | ||
1735 | return count; | |
1736 | } | |
1737 | ||
2f1046f3 | 1738 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1739 | { |
1740 | struct drm_display_mode *mode; | |
1741 | ||
0b4c0f3f | 1742 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1743 | if (mode->hdisplay > width || |
1744 | mode->vdisplay > height) | |
38651674 DA |
1745 | continue; |
1746 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1747 | return mode; | |
1748 | } | |
1749 | return NULL; | |
1750 | } | |
2f1046f3 | 1751 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1752 | |
0b4c0f3f | 1753 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1754 | { |
eaf99c74 | 1755 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1756 | } |
1757 | ||
a09759e8 | 1758 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn) |
38651674 | 1759 | { |
1794d257 | 1760 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1761 | struct drm_display_mode *mode; |
c683f427 | 1762 | bool prefer_non_interlace; |
38651674 | 1763 | |
eaf99c74 | 1764 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1765 | if (cmdline_mode->specified == false) |
f3af5c7d | 1766 | return NULL; |
38651674 DA |
1767 | |
1768 | /* attempt to find a matching mode in the list of modes | |
1769 | * we have gotten so far, if not add a CVT mode that conforms | |
1770 | */ | |
1771 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1772 | goto create_mode; | |
1773 | ||
c683f427 | 1774 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1775 | again: |
0b4c0f3f | 1776 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1777 | /* check width/height */ |
1778 | if (mode->hdisplay != cmdline_mode->xres || | |
1779 | mode->vdisplay != cmdline_mode->yres) | |
1780 | continue; | |
1781 | ||
1782 | if (cmdline_mode->refresh_specified) { | |
1783 | if (mode->vrefresh != cmdline_mode->refresh) | |
1784 | continue; | |
1785 | } | |
1786 | ||
1787 | if (cmdline_mode->interlace) { | |
1788 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1789 | continue; | |
c683f427 TI |
1790 | } else if (prefer_non_interlace) { |
1791 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1792 | continue; | |
38651674 DA |
1793 | } |
1794 | return mode; | |
1795 | } | |
1796 | ||
c683f427 TI |
1797 | if (prefer_non_interlace) { |
1798 | prefer_non_interlace = false; | |
1799 | goto again; | |
1800 | } | |
1801 | ||
38651674 | 1802 | create_mode: |
1794d257 CW |
1803 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1804 | cmdline_mode); | |
0b4c0f3f | 1805 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1806 | return mode; |
1807 | } | |
2f1046f3 | 1808 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1809 | |
1810 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1811 | { | |
1812 | bool enable; | |
1813 | ||
96081cdf | 1814 | if (strict) |
38651674 | 1815 | enable = connector->status == connector_status_connected; |
96081cdf | 1816 | else |
38651674 | 1817 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1818 | |
38651674 DA |
1819 | return enable; |
1820 | } | |
1821 | ||
0b4c0f3f DA |
1822 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1823 | bool *enabled) | |
38651674 DA |
1824 | { |
1825 | bool any_enabled = false; | |
1826 | struct drm_connector *connector; | |
1827 | int i = 0; | |
1828 | ||
966a6a13 | 1829 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1830 | connector = fb_helper->connector_info[i]->connector; |
38651674 DA |
1831 | enabled[i] = drm_connector_enabled(connector, true); |
1832 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1833 | enabled[i] ? "yes" : "no"); | |
1834 | any_enabled |= enabled[i]; | |
38651674 DA |
1835 | } |
1836 | ||
1837 | if (any_enabled) | |
1838 | return; | |
1839 | ||
966a6a13 | 1840 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1841 | connector = fb_helper->connector_info[i]->connector; |
38651674 | 1842 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1843 | } |
1844 | } | |
1845 | ||
1d42bbc8 DA |
1846 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1847 | struct drm_display_mode **modes, | |
b0ee9e7f | 1848 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1849 | bool *enabled, int width, int height) |
1850 | { | |
1851 | int count, i, j; | |
1852 | bool can_clone = false; | |
1853 | struct drm_fb_helper_connector *fb_helper_conn; | |
1854 | struct drm_display_mode *dmt_mode, *mode; | |
1855 | ||
1856 | /* only contemplate cloning in the single crtc case */ | |
1857 | if (fb_helper->crtc_count > 1) | |
1858 | return false; | |
1859 | ||
1860 | count = 0; | |
966a6a13 | 1861 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1862 | if (enabled[i]) |
1863 | count++; | |
1864 | } | |
1865 | ||
1866 | /* only contemplate cloning if more than one connector is enabled */ | |
1867 | if (count <= 1) | |
1868 | return false; | |
1869 | ||
1870 | /* check the command line or if nothing common pick 1024x768 */ | |
1871 | can_clone = true; | |
966a6a13 | 1872 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1873 | if (!enabled[i]) |
1874 | continue; | |
1875 | fb_helper_conn = fb_helper->connector_info[i]; | |
a09759e8 | 1876 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn); |
1d42bbc8 DA |
1877 | if (!modes[i]) { |
1878 | can_clone = false; | |
1879 | break; | |
1880 | } | |
1881 | for (j = 0; j < i; j++) { | |
1882 | if (!enabled[j]) | |
1883 | continue; | |
1884 | if (!drm_mode_equal(modes[j], modes[i])) | |
1885 | can_clone = false; | |
1886 | } | |
1887 | } | |
1888 | ||
1889 | if (can_clone) { | |
1890 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1891 | return true; | |
1892 | } | |
1893 | ||
1894 | /* try and find a 1024x768 mode on each connector */ | |
1895 | can_clone = true; | |
f6e252ba | 1896 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 | 1897 | |
966a6a13 | 1898 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1899 | if (!enabled[i]) |
1900 | continue; | |
1901 | ||
1902 | fb_helper_conn = fb_helper->connector_info[i]; | |
1903 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1904 | if (drm_mode_equal(mode, dmt_mode)) | |
1905 | modes[i] = mode; | |
1906 | } | |
1907 | if (!modes[i]) | |
1908 | can_clone = false; | |
1909 | } | |
1910 | ||
1911 | if (can_clone) { | |
1912 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1913 | return true; | |
1914 | } | |
1915 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1916 | return false; | |
1917 | } | |
1918 | ||
b0ee9e7f DA |
1919 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
1920 | struct drm_display_mode **modes, | |
1921 | struct drm_fb_offset *offsets, | |
1922 | int idx, | |
1923 | int h_idx, int v_idx) | |
1924 | { | |
1925 | struct drm_fb_helper_connector *fb_helper_conn; | |
1926 | int i; | |
1927 | int hoffset = 0, voffset = 0; | |
1928 | ||
966a6a13 | 1929 | drm_fb_helper_for_each_connector(fb_helper, i) { |
b0ee9e7f DA |
1930 | fb_helper_conn = fb_helper->connector_info[i]; |
1931 | if (!fb_helper_conn->connector->has_tile) | |
1932 | continue; | |
1933 | ||
1934 | if (!modes[i] && (h_idx || v_idx)) { | |
1935 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
1936 | fb_helper_conn->connector->base.id); | |
1937 | continue; | |
1938 | } | |
1939 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
1940 | hoffset += modes[i]->hdisplay; | |
1941 | ||
1942 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
1943 | voffset += modes[i]->vdisplay; | |
1944 | } | |
1945 | offsets[idx].x = hoffset; | |
1946 | offsets[idx].y = voffset; | |
1947 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
1948 | return 0; | |
1949 | } | |
1950 | ||
0b4c0f3f | 1951 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 1952 | struct drm_display_mode **modes, |
b0ee9e7f | 1953 | struct drm_fb_offset *offsets, |
38651674 DA |
1954 | bool *enabled, int width, int height) |
1955 | { | |
0b4c0f3f | 1956 | struct drm_fb_helper_connector *fb_helper_conn; |
c96521ee CW |
1957 | const u64 mask = BIT_ULL(fb_helper->connector_count) - 1; |
1958 | u64 conn_configured = 0; | |
b0ee9e7f | 1959 | int tile_pass = 0; |
c96521ee CW |
1960 | int i; |
1961 | ||
b0ee9e7f | 1962 | retry: |
966a6a13 | 1963 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1964 | fb_helper_conn = fb_helper->connector_info[i]; |
38651674 | 1965 | |
c96521ee | 1966 | if (conn_configured & BIT_ULL(i)) |
b0ee9e7f DA |
1967 | continue; |
1968 | ||
1969 | if (enabled[i] == false) { | |
c96521ee | 1970 | conn_configured |= BIT_ULL(i); |
b0ee9e7f DA |
1971 | continue; |
1972 | } | |
1973 | ||
1974 | /* first pass over all the untiled connectors */ | |
1975 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 1976 | continue; |
38651674 | 1977 | |
b0ee9e7f DA |
1978 | if (tile_pass == 1) { |
1979 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
1980 | fb_helper_conn->connector->tile_v_loc != 0) | |
1981 | continue; | |
1982 | ||
1983 | } else { | |
1984 | if (fb_helper_conn->connector->tile_h_loc != tile_pass -1 && | |
1985 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) | |
1986 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
1987 | continue; | |
1988 | ||
1989 | /* find the tile offsets for this pass - need | |
1990 | to find all tiles left and above */ | |
1991 | drm_get_tile_offsets(fb_helper, modes, offsets, | |
1992 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
1993 | } | |
38651674 | 1994 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 1995 | fb_helper_conn->connector->base.id); |
38651674 DA |
1996 | |
1997 | /* got for command line mode first */ | |
a09759e8 | 1998 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn); |
38651674 | 1999 | if (!modes[i]) { |
b0ee9e7f DA |
2000 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
2001 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 2002 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
2003 | } |
2004 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
2005 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
2006 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
2007 | break; |
2008 | } | |
2009 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
2010 | "none"); | |
c96521ee | 2011 | conn_configured |= BIT_ULL(i); |
b0ee9e7f DA |
2012 | } |
2013 | ||
2014 | if ((conn_configured & mask) != mask) { | |
2015 | tile_pass++; | |
2016 | goto retry; | |
38651674 DA |
2017 | } |
2018 | return true; | |
2019 | } | |
2020 | ||
8be48d92 DA |
2021 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
2022 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
2023 | struct drm_display_mode **modes, |
2024 | int n, int width, int height) | |
2025 | { | |
2026 | int c, o; | |
2027 | struct drm_connector *connector; | |
be26a66d | 2028 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 2029 | struct drm_encoder *encoder; |
38651674 | 2030 | int my_score, best_score, score; |
8be48d92 | 2031 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 2032 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 2033 | |
0b4c0f3f | 2034 | if (n == fb_helper->connector_count) |
38651674 | 2035 | return 0; |
0b4c0f3f DA |
2036 | |
2037 | fb_helper_conn = fb_helper->connector_info[n]; | |
2038 | connector = fb_helper_conn->connector; | |
38651674 DA |
2039 | |
2040 | best_crtcs[n] = NULL; | |
8be48d92 | 2041 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
2042 | if (modes[n] == NULL) |
2043 | return best_score; | |
2044 | ||
255f0e7c | 2045 | crtcs = kzalloc(fb_helper->connector_count * |
8be48d92 | 2046 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
2047 | if (!crtcs) |
2048 | return best_score; | |
2049 | ||
2050 | my_score = 1; | |
2051 | if (connector->status == connector_status_connected) | |
2052 | my_score++; | |
0b4c0f3f | 2053 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 2054 | my_score++; |
0b4c0f3f | 2055 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
2056 | my_score++; |
2057 | ||
2058 | connector_funcs = connector->helper_private; | |
c61b93fe BB |
2059 | |
2060 | /* | |
2061 | * If the DRM device implements atomic hooks and ->best_encoder() is | |
2062 | * NULL we fallback to the default drm_atomic_helper_best_encoder() | |
2063 | * helper. | |
2064 | */ | |
a743d758 | 2065 | if (drm_drv_uses_atomic_modeset(fb_helper->dev) && |
c61b93fe BB |
2066 | !connector_funcs->best_encoder) |
2067 | encoder = drm_atomic_helper_best_encoder(connector); | |
2068 | else | |
2069 | encoder = connector_funcs->best_encoder(connector); | |
2070 | ||
38651674 DA |
2071 | if (!encoder) |
2072 | goto out; | |
2073 | ||
38651674 DA |
2074 | /* select a crtc for this connector and then attempt to configure |
2075 | remaining connectors */ | |
8be48d92 DA |
2076 | for (c = 0; c < fb_helper->crtc_count; c++) { |
2077 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 2078 | |
96081cdf | 2079 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 2080 | continue; |
38651674 DA |
2081 | |
2082 | for (o = 0; o < n; o++) | |
2083 | if (best_crtcs[o] == crtc) | |
2084 | break; | |
2085 | ||
2086 | if (o < n) { | |
1d42bbc8 DA |
2087 | /* ignore cloning unless only a single crtc */ |
2088 | if (fb_helper->crtc_count > 1) | |
2089 | continue; | |
2090 | ||
2091 | if (!drm_mode_equal(modes[o], modes[n])) | |
2092 | continue; | |
38651674 DA |
2093 | } |
2094 | ||
2095 | crtcs[n] = crtc; | |
8be48d92 DA |
2096 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
2097 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
2098 | width, height); |
2099 | if (score > best_score) { | |
38651674 DA |
2100 | best_score = score; |
2101 | memcpy(best_crtcs, crtcs, | |
255f0e7c | 2102 | fb_helper->connector_count * |
8be48d92 | 2103 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 2104 | } |
38651674 DA |
2105 | } |
2106 | out: | |
2107 | kfree(crtcs); | |
2108 | return best_score; | |
2109 | } | |
2110 | ||
64e94407 CW |
2111 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, |
2112 | u32 width, u32 height) | |
38651674 | 2113 | { |
8be48d92 DA |
2114 | struct drm_device *dev = fb_helper->dev; |
2115 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 2116 | struct drm_display_mode **modes; |
b0ee9e7f | 2117 | struct drm_fb_offset *offsets; |
38651674 | 2118 | bool *enabled; |
11e17a08 | 2119 | int i; |
38651674 DA |
2120 | |
2121 | DRM_DEBUG_KMS("\n"); | |
64e94407 CW |
2122 | if (drm_fb_helper_probe_connector_modes(fb_helper, width, height) == 0) |
2123 | DRM_DEBUG_KMS("No connectors reported connected with modes\n"); | |
38651674 | 2124 | |
966a6a13 CW |
2125 | /* prevent concurrent modification of connector_count by hotplug */ |
2126 | lockdep_assert_held(&fb_helper->dev->mode_config.mutex); | |
2127 | ||
383b2e57 | 2128 | crtcs = kcalloc(fb_helper->connector_count, |
8be48d92 | 2129 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
383b2e57 | 2130 | modes = kcalloc(fb_helper->connector_count, |
38651674 | 2131 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
383b2e57 | 2132 | offsets = kcalloc(fb_helper->connector_count, |
b0ee9e7f | 2133 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
383b2e57 | 2134 | enabled = kcalloc(fb_helper->connector_count, |
38651674 | 2135 | sizeof(bool), GFP_KERNEL); |
b0ee9e7f | 2136 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
2137 | DRM_ERROR("Memory allocation failed\n"); |
2138 | goto out; | |
2139 | } | |
2140 | ||
0b4c0f3f | 2141 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2142 | |
11e17a08 JB |
2143 | if (!(fb_helper->funcs->initial_config && |
2144 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2145 | offsets, |
11e17a08 | 2146 | enabled, width, height))) { |
383b2e57 ML |
2147 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
2148 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); | |
2149 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); | |
11e17a08 | 2150 | |
b0ee9e7f DA |
2151 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2152 | enabled, width, height) && | |
2153 | !drm_target_preferred(fb_helper, modes, offsets, | |
2154 | enabled, width, height)) | |
1d42bbc8 | 2155 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2156 | |
11e17a08 JB |
2157 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2158 | width, height); | |
38651674 | 2159 | |
11e17a08 JB |
2160 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2161 | } | |
8be48d92 DA |
2162 | |
2163 | /* need to set the modesets up here for use later */ | |
2164 | /* fill out the connector<->crtc mappings into the modesets */ | |
a2889606 VS |
2165 | for (i = 0; i < fb_helper->crtc_count; i++) |
2166 | drm_fb_helper_modeset_release(fb_helper, | |
2167 | &fb_helper->crtc_info[i].mode_set); | |
38651674 | 2168 | |
966a6a13 | 2169 | drm_fb_helper_for_each_connector(fb_helper, i) { |
38651674 | 2170 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2171 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2172 | struct drm_fb_offset *offset = &offsets[i]; |
a2889606 | 2173 | struct drm_mode_set *modeset = &fb_crtc->mode_set; |
38651674 | 2174 | |
8be48d92 | 2175 | if (mode && fb_crtc) { |
a2889606 VS |
2176 | struct drm_connector *connector = |
2177 | fb_helper->connector_info[i]->connector; | |
2178 | ||
b0ee9e7f DA |
2179 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2180 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
a2889606 | 2181 | |
8be48d92 | 2182 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2183 | fb_crtc->x = offset->x; |
2184 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2185 | modeset->mode = drm_mode_duplicate(dev, |
2186 | fb_crtc->desired_mode); | |
a2889606 VS |
2187 | drm_connector_reference(connector); |
2188 | modeset->connectors[modeset->num_connectors++] = connector; | |
7e53f3a4 | 2189 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2190 | modeset->x = offset->x; |
2191 | modeset->y = offset->y; | |
7e53f3a4 DV |
2192 | } |
2193 | } | |
8c5eaca0 | 2194 | out: |
38651674 DA |
2195 | kfree(crtcs); |
2196 | kfree(modes); | |
b0ee9e7f | 2197 | kfree(offsets); |
38651674 DA |
2198 | kfree(enabled); |
2199 | } | |
2200 | ||
2201 | /** | |
207fd329 | 2202 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2203 | * @fb_helper: fb_helper device struct |
2204 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2205 | * |
d0ddc033 | 2206 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2207 | * At the moment, this is a cloned configuration across all heads with |
2208 | * a new framebuffer object as the backing store. | |
2209 | * | |
207fd329 DV |
2210 | * Note that this also registers the fbdev and so allows userspace to call into |
2211 | * the driver through the fbdev interfaces. | |
2212 | * | |
6806cdf9 DV |
2213 | * This function will call down into the &drm_fb_helper_funcs.fb_probe callback |
2214 | * to let the driver allocate and initialize the fbdev info structure and the | |
2215 | * drm framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
207fd329 DV |
2216 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default |
2217 | * values for the fbdev info structure. | |
2218 | * | |
40f8cf4b DV |
2219 | * HANG DEBUGGING: |
2220 | * | |
2221 | * When you have fbcon support built-in or already loaded, this function will do | |
2222 | * a full modeset to setup the fbdev console. Due to locking misdesign in the | |
2223 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding | |
2224 | * console_lock. Until console_unlock is called no dmesg lines will be sent out | |
2225 | * to consoles, not even serial console. This means when your driver crashes, | |
2226 | * you will see absolutely nothing else but a system stuck in this function, | |
2227 | * with no further output. Any kind of printk() you place within your own driver | |
2228 | * or in the drm core modeset code will also never show up. | |
2229 | * | |
2230 | * Standard debug practice is to run the fbcon setup without taking the | |
2231 | * console_lock as a hack, to be able to see backtraces and crashes on the | |
2232 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel | |
2233 | * cmdline option. | |
2234 | * | |
2235 | * The other option is to just disable fbdev emulation since very likely the | |
af509d38 L |
2236 | * first modeset from userspace will crash in the same way, and is even easier |
2237 | * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 | |
40f8cf4b DV |
2238 | * kernel cmdline option. |
2239 | * | |
38651674 DA |
2240 | * RETURNS: |
2241 | * Zero if everything went ok, nonzero otherwise. | |
2242 | */ | |
01934c2a | 2243 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2244 | { |
8be48d92 | 2245 | struct drm_device *dev = fb_helper->dev; |
966a6a13 | 2246 | struct fb_info *info; |
966a6a13 | 2247 | int ret; |
38651674 | 2248 | |
f64c5573 DV |
2249 | if (!drm_fbdev_emulation) |
2250 | return 0; | |
2251 | ||
53f1904b | 2252 | mutex_lock(&dev->mode_config.mutex); |
64e94407 CW |
2253 | drm_setup_crtcs(fb_helper, |
2254 | dev->mode_config.max_width, | |
2255 | dev->mode_config.max_height); | |
966a6a13 CW |
2256 | ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
2257 | mutex_unlock(&dev->mode_config.mutex); | |
2258 | if (ret) | |
2259 | return ret; | |
38651674 | 2260 | |
966a6a13 CW |
2261 | info = fb_helper->fbdev; |
2262 | info->var.pixclock = 0; | |
2263 | ret = register_framebuffer(info); | |
2264 | if (ret < 0) | |
2265 | return ret; | |
2266 | ||
2267 | dev_info(dev->dev, "fb%d: %s frame buffer device\n", | |
2268 | info->node, info->fix.id); | |
2269 | ||
a53ca635 | 2270 | mutex_lock(&kernel_fb_helper_lock); |
966a6a13 CW |
2271 | if (list_empty(&kernel_fb_helper_list)) |
2272 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
2273 | ||
2274 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
a53ca635 | 2275 | mutex_unlock(&kernel_fb_helper_lock); |
966a6a13 CW |
2276 | |
2277 | return 0; | |
38651674 | 2278 | } |
8be48d92 | 2279 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2280 | |
7394371d CW |
2281 | /** |
2282 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2283 | * probing all the outputs attached to the fb |
7394371d CW |
2284 | * @fb_helper: the drm_fb_helper |
2285 | * | |
7394371d | 2286 | * Scan the connectors attached to the fb_helper and try to put together a |
62cacc79 | 2287 | * setup after notification of a change in output configuration. |
7394371d | 2288 | * |
207fd329 DV |
2289 | * Called at runtime, takes the mode config locks to be able to check/change the |
2290 | * modeset configuration. Must be run from process context (which usually means | |
2291 | * either the output polling work or a work item launched from the driver's | |
2292 | * hotplug interrupt). | |
2293 | * | |
50c3dc97 | 2294 | * Note that drivers may call this even before calling |
af509d38 | 2295 | * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows |
50c3dc97 DV |
2296 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
2297 | * not miss any hotplug events. | |
207fd329 | 2298 | * |
7394371d CW |
2299 | * RETURNS: |
2300 | * 0 on success and a non-zero error code otherwise. | |
2301 | */ | |
2302 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2303 | { |
7394371d | 2304 | struct drm_device *dev = fb_helper->dev; |
5c4426a7 | 2305 | |
f64c5573 DV |
2306 | if (!drm_fbdev_emulation) |
2307 | return 0; | |
2308 | ||
64e94407 | 2309 | mutex_lock(&dev->mode_config.mutex); |
50c3dc97 | 2310 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2311 | fb_helper->delayed_hotplug = true; |
64e94407 | 2312 | mutex_unlock(&dev->mode_config.mutex); |
7394371d | 2313 | return 0; |
4abe3520 | 2314 | } |
eb1f8e4f | 2315 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2316 | |
64e94407 | 2317 | drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height); |
5c4426a7 | 2318 | |
64e94407 | 2319 | mutex_unlock(&dev->mode_config.mutex); |
89ced125 | 2320 | |
2180c3c7 DV |
2321 | drm_fb_helper_set_par(fb_helper->fbdev); |
2322 | ||
2323 | return 0; | |
5c4426a7 | 2324 | } |
eb1f8e4f | 2325 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2326 | |
6a108a14 | 2327 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2328 | * but the module doesn't depend on any fb console symbols. At least |
2329 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2330 | */ | |
70412cfa | 2331 | int __init drm_fb_helper_modinit(void) |
3ce05168 | 2332 | { |
70412cfa | 2333 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2334 | const char *name = "fbcon"; |
2335 | struct module *fbcon; | |
2336 | ||
2337 | mutex_lock(&module_mutex); | |
2338 | fbcon = find_module(name); | |
2339 | mutex_unlock(&module_mutex); | |
2340 | ||
2341 | if (!fbcon) | |
2342 | request_module_nowait(name); | |
70412cfa | 2343 | #endif |
3ce05168 DF |
2344 | return 0; |
2345 | } | |
70412cfa | 2346 | EXPORT_SYMBOL(drm_fb_helper_modinit); |