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 | ||
5f152576 XL |
51 | static int drm_fbdev_overalloc = CONFIG_DRM_FBDEV_OVERALLOC; |
52 | module_param(drm_fbdev_overalloc, int, 0444); | |
53 | MODULE_PARM_DESC(drm_fbdev_overalloc, | |
54 | "Overallocation of the fbdev buffer (%) [default=" | |
55 | __MODULE_STRING(CONFIG_DRM_FBDEV_OVERALLOC) "]"); | |
56 | ||
785b93ef | 57 | static LIST_HEAD(kernel_fb_helper_list); |
a53ca635 | 58 | static DEFINE_MUTEX(kernel_fb_helper_lock); |
785b93ef | 59 | |
d0ddc033 DV |
60 | /** |
61 | * DOC: fbdev helpers | |
62 | * | |
63 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
83c617c5 | 64 | * mode setting driver. They can be used mostly independently from the crtc |
d0ddc033 DV |
65 | * helper functions used by many drivers to implement the kernel mode setting |
66 | * interfaces. | |
207fd329 | 67 | * |
10a23102 TR |
68 | * Initialization is done as a four-step process with drm_fb_helper_prepare(), |
69 | * drm_fb_helper_init(), drm_fb_helper_single_add_all_connectors() and | |
70 | * drm_fb_helper_initial_config(). Drivers with fancier requirements than the | |
71 | * default behaviour can override the third step with their own code. | |
ed84e254 DV |
72 | * Teardown is done with drm_fb_helper_fini() after the fbdev device is |
73 | * unregisters using drm_fb_helper_unregister_fbi(). | |
207fd329 DV |
74 | * |
75 | * At runtime drivers should restore the fbdev console by calling | |
6806cdf9 DV |
76 | * drm_fb_helper_restore_fbdev_mode_unlocked() from their &drm_driver.lastclose |
77 | * callback. They should also notify the fb helper code from updates to the | |
78 | * output configuration by calling drm_fb_helper_hotplug_event(). For easier | |
207fd329 | 79 | * integration with the output polling code in drm_crtc_helper.c the modeset |
6806cdf9 | 80 | * code provides a &drm_mode_config_funcs.output_poll_changed callback. |
207fd329 DV |
81 | * |
82 | * All other functions exported by the fb helper library can be used to | |
83 | * implement the fbdev driver interface by the driver. | |
10a23102 TR |
84 | * |
85 | * It is possible, though perhaps somewhat tricky, to implement race-free | |
86 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() | |
87 | * helper must be called first to initialize the minimum required to make | |
88 | * hotplug detection work. Drivers also need to make sure to properly set up | |
6806cdf9 | 89 | * the &drm_mode_config.funcs member. After calling drm_kms_helper_poll_init() |
10a23102 TR |
90 | * it is safe to enable interrupts and start processing hotplug events. At the |
91 | * same time, drivers should initialize all modeset objects such as CRTCs, | |
92 | * encoders and connectors. To finish up the fbdev helper initialization, the | |
93 | * drm_fb_helper_init() function is called. To probe for all attached displays | |
94 | * and set up an initial configuration using the detected hardware, drivers | |
95 | * should call drm_fb_helper_single_add_all_connectors() followed by | |
96 | * drm_fb_helper_initial_config(). | |
eaa434de | 97 | * |
6806cdf9 | 98 | * If &drm_framebuffer_funcs.dirty is set, the |
2dad551c | 99 | * drm_fb_helper_{cfb,sys}_{write,fillrect,copyarea,imageblit} functions will |
6806cdf9 | 100 | * accumulate changes and schedule &drm_fb_helper.dirty_work to run right |
2dad551c NT |
101 | * away. This worker then calls the dirty() function ensuring that it will |
102 | * always run in process context since the fb_*() function could be running in | |
103 | * atomic context. If drm_fb_helper_deferred_io() is used as the deferred_io | |
104 | * callback it will also schedule dirty_work with the damage collected from the | |
105 | * mmap page writes. | |
d0ddc033 DV |
106 | */ |
107 | ||
966a6a13 CW |
108 | #define drm_fb_helper_for_each_connector(fbh, i__) \ |
109 | for (({ lockdep_assert_held(&(fbh)->dev->mode_config.mutex); }), \ | |
110 | i__ = 0; i__ < (fbh)->connector_count; i__++) | |
111 | ||
50021ff1 TR |
112 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, |
113 | struct drm_connector *connector) | |
39b8b2ed | 114 | { |
50021ff1 | 115 | struct drm_fb_helper_connector *fb_conn; |
39b8b2ed | 116 | struct drm_fb_helper_connector **temp; |
50021ff1 | 117 | unsigned int count; |
39b8b2ed TR |
118 | |
119 | if (!drm_fbdev_emulation) | |
120 | return 0; | |
121 | ||
122 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); | |
50021ff1 TR |
123 | |
124 | count = fb_helper->connector_count + 1; | |
125 | ||
126 | if (count > fb_helper->connector_info_alloc_count) { | |
127 | size_t size = count * sizeof(fb_conn); | |
128 | ||
129 | temp = krealloc(fb_helper->connector_info, size, GFP_KERNEL); | |
39b8b2ed TR |
130 | if (!temp) |
131 | return -ENOMEM; | |
132 | ||
50021ff1 | 133 | fb_helper->connector_info_alloc_count = count; |
39b8b2ed TR |
134 | fb_helper->connector_info = temp; |
135 | } | |
136 | ||
50021ff1 TR |
137 | fb_conn = kzalloc(sizeof(*fb_conn), GFP_KERNEL); |
138 | if (!fb_conn) | |
39b8b2ed TR |
139 | return -ENOMEM; |
140 | ||
141 | drm_connector_get(connector); | |
50021ff1 TR |
142 | fb_conn->connector = connector; |
143 | fb_helper->connector_info[fb_helper->connector_count++] = fb_conn; | |
39b8b2ed TR |
144 | return 0; |
145 | } | |
146 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); | |
147 | ||
207fd329 DV |
148 | /** |
149 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
150 | * emulation helper | |
151 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
152 | * | |
153 | * This functions adds all the available connectors for use with the given | |
154 | * fb_helper. This is a separate step to allow drivers to freely assign | |
155 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
156 | * not adequate to be used for the fbcon. | |
157 | * | |
169faeca DV |
158 | * This function is protected against concurrent connector hotadds/removals |
159 | * using drm_fb_helper_add_one_connector() and | |
160 | * drm_fb_helper_remove_one_connector(). | |
207fd329 | 161 | */ |
0b4c0f3f | 162 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 163 | { |
0b4c0f3f DA |
164 | struct drm_device *dev = fb_helper->dev; |
165 | struct drm_connector *connector; | |
c36a3254 DV |
166 | struct drm_connector_list_iter conn_iter; |
167 | int i, ret = 0; | |
d50ba256 | 168 | |
f64c5573 DV |
169 | if (!drm_fbdev_emulation) |
170 | return 0; | |
171 | ||
169faeca | 172 | mutex_lock(&dev->mode_config.mutex); |
b982dab1 | 173 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 174 | drm_for_each_connector_iter(connector, &conn_iter) { |
15fce29d | 175 | ret = drm_fb_helper_add_one_connector(fb_helper, connector); |
0b4c0f3f | 176 | |
15fce29d | 177 | if (ret) |
0b4c0f3f | 178 | goto fail; |
0b4c0f3f | 179 | } |
c36a3254 DV |
180 | goto out; |
181 | ||
0b4c0f3f | 182 | fail: |
966a6a13 | 183 | drm_fb_helper_for_each_connector(fb_helper, i) { |
7dfcb36a VS |
184 | struct drm_fb_helper_connector *fb_helper_connector = |
185 | fb_helper->connector_info[i]; | |
186 | ||
ad093607 | 187 | drm_connector_put(fb_helper_connector->connector); |
7dfcb36a VS |
188 | |
189 | kfree(fb_helper_connector); | |
0b4c0f3f DA |
190 | fb_helper->connector_info[i] = NULL; |
191 | } | |
192 | fb_helper->connector_count = 0; | |
c36a3254 | 193 | out: |
b982dab1 | 194 | drm_connector_list_iter_end(&conn_iter); |
169faeca DV |
195 | mutex_unlock(&dev->mode_config.mutex); |
196 | ||
15fce29d | 197 | return ret; |
d50ba256 | 198 | } |
0b4c0f3f | 199 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 200 | |
65c2a89c DA |
201 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, |
202 | struct drm_connector *connector) | |
203 | { | |
204 | struct drm_fb_helper_connector *fb_helper_connector; | |
205 | int i, j; | |
206 | ||
f64c5573 DV |
207 | if (!drm_fbdev_emulation) |
208 | return 0; | |
209 | ||
65c2a89c DA |
210 | WARN_ON(!mutex_is_locked(&fb_helper->dev->mode_config.mutex)); |
211 | ||
212 | for (i = 0; i < fb_helper->connector_count; i++) { | |
213 | if (fb_helper->connector_info[i]->connector == connector) | |
214 | break; | |
215 | } | |
216 | ||
217 | if (i == fb_helper->connector_count) | |
218 | return -EINVAL; | |
219 | fb_helper_connector = fb_helper->connector_info[i]; | |
ad093607 | 220 | drm_connector_put(fb_helper_connector->connector); |
65c2a89c | 221 | |
4b4f99f5 | 222 | for (j = i + 1; j < fb_helper->connector_count; j++) |
65c2a89c | 223 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; |
4b4f99f5 | 224 | |
65c2a89c DA |
225 | fb_helper->connector_count--; |
226 | kfree(fb_helper_connector); | |
2148f18f | 227 | |
65c2a89c DA |
228 | return 0; |
229 | } | |
230 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); | |
231 | ||
99231028 JW |
232 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
233 | { | |
234 | uint16_t *r_base, *g_base, *b_base; | |
235 | int i; | |
236 | ||
04c0c569 VS |
237 | if (helper->funcs->gamma_get == NULL) |
238 | return; | |
239 | ||
99231028 JW |
240 | r_base = crtc->gamma_store; |
241 | g_base = r_base + crtc->gamma_size; | |
242 | b_base = g_base + crtc->gamma_size; | |
243 | ||
244 | for (i = 0; i < crtc->gamma_size; i++) | |
245 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
246 | } | |
247 | ||
248 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
249 | { | |
250 | uint16_t *r_base, *g_base, *b_base; | |
251 | ||
ebe0f244 LP |
252 | if (crtc->funcs->gamma_set == NULL) |
253 | return; | |
254 | ||
99231028 JW |
255 | r_base = crtc->gamma_store; |
256 | g_base = r_base + crtc->gamma_size; | |
257 | b_base = g_base + crtc->gamma_size; | |
258 | ||
6d124ff8 DV |
259 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, |
260 | crtc->gamma_size, NULL); | |
99231028 JW |
261 | } |
262 | ||
207fd329 | 263 | /** |
6806cdf9 | 264 | * drm_fb_helper_debug_enter - implementation for &fb_ops.fb_debug_enter |
207fd329 DV |
265 | * @info: fbdev registered by the helper |
266 | */ | |
1a7aba7f JB |
267 | int drm_fb_helper_debug_enter(struct fb_info *info) |
268 | { | |
269 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 270 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
271 | int i; |
272 | ||
1a7aba7f JB |
273 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
274 | for (i = 0; i < helper->crtc_count; i++) { | |
275 | struct drm_mode_set *mode_set = | |
276 | &helper->crtc_info[i].mode_set; | |
277 | ||
278 | if (!mode_set->crtc->enabled) | |
279 | continue; | |
280 | ||
281 | funcs = mode_set->crtc->helper_private; | |
1b99b724 SC |
282 | if (funcs->mode_set_base_atomic == NULL) |
283 | continue; | |
284 | ||
9c79e0b1 DV |
285 | if (drm_drv_uses_atomic_modeset(mode_set->crtc->dev)) |
286 | continue; | |
287 | ||
99231028 | 288 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
289 | funcs->mode_set_base_atomic(mode_set->crtc, |
290 | mode_set->fb, | |
291 | mode_set->x, | |
413d45d3 | 292 | mode_set->y, |
21c74a8e | 293 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
294 | } |
295 | } | |
296 | ||
297 | return 0; | |
298 | } | |
299 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
300 | ||
301 | /* Find the real fb for a given fb helper CRTC */ | |
302 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
303 | { | |
304 | struct drm_device *dev = crtc->dev; | |
305 | struct drm_crtc *c; | |
306 | ||
6295d607 | 307 | drm_for_each_crtc(c, dev) { |
1a7aba7f | 308 | if (crtc->base.id == c->base.id) |
f4510a27 | 309 | return c->primary->fb; |
1a7aba7f JB |
310 | } |
311 | ||
312 | return NULL; | |
313 | } | |
314 | ||
207fd329 | 315 | /** |
6806cdf9 | 316 | * drm_fb_helper_debug_leave - implementation for &fb_ops.fb_debug_leave |
207fd329 DV |
317 | * @info: fbdev registered by the helper |
318 | */ | |
1a7aba7f JB |
319 | int drm_fb_helper_debug_leave(struct fb_info *info) |
320 | { | |
321 | struct drm_fb_helper *helper = info->par; | |
322 | struct drm_crtc *crtc; | |
be26a66d | 323 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
324 | struct drm_framebuffer *fb; |
325 | int i; | |
326 | ||
327 | for (i = 0; i < helper->crtc_count; i++) { | |
328 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
4b4f99f5 | 329 | |
1a7aba7f JB |
330 | crtc = mode_set->crtc; |
331 | funcs = crtc->helper_private; | |
332 | fb = drm_mode_config_fb(crtc); | |
333 | ||
334 | if (!crtc->enabled) | |
335 | continue; | |
336 | ||
337 | if (!fb) { | |
338 | DRM_ERROR("no fb to restore??\n"); | |
339 | continue; | |
340 | } | |
341 | ||
1b99b724 SC |
342 | if (funcs->mode_set_base_atomic == NULL) |
343 | continue; | |
344 | ||
9c79e0b1 DV |
345 | if (drm_drv_uses_atomic_modeset(crtc->dev)) |
346 | continue; | |
347 | ||
99231028 | 348 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 349 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 350 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
351 | } |
352 | ||
353 | return 0; | |
354 | } | |
355 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
356 | ||
bbb1e524 RC |
357 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
358 | { | |
359 | struct drm_device *dev = fb_helper->dev; | |
360 | struct drm_plane *plane; | |
361 | struct drm_atomic_state *state; | |
362 | int i, ret; | |
4b4f99f5 | 363 | unsigned int plane_mask; |
bbb1e524 RC |
364 | |
365 | state = drm_atomic_state_alloc(dev); | |
366 | if (!state) | |
367 | return -ENOMEM; | |
368 | ||
369 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
370 | retry: | |
f72c6b33 | 371 | plane_mask = 0; |
bbb1e524 RC |
372 | drm_for_each_plane(plane, dev) { |
373 | struct drm_plane_state *plane_state; | |
374 | ||
375 | plane_state = drm_atomic_get_plane_state(state, plane); | |
376 | if (IS_ERR(plane_state)) { | |
377 | ret = PTR_ERR(plane_state); | |
378 | goto fail; | |
379 | } | |
380 | ||
31ad61e4 | 381 | plane_state->rotation = DRM_ROTATE_0; |
bbb1e524 | 382 | |
f72c6b33 ML |
383 | plane->old_fb = plane->fb; |
384 | plane_mask |= 1 << drm_plane_index(plane); | |
385 | ||
bbb1e524 RC |
386 | /* disable non-primary: */ |
387 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
388 | continue; | |
389 | ||
390 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
391 | if (ret != 0) | |
392 | goto fail; | |
393 | } | |
394 | ||
4b4f99f5 | 395 | for (i = 0; i < fb_helper->crtc_count; i++) { |
bbb1e524 RC |
396 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; |
397 | ||
398 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
399 | if (ret != 0) | |
400 | goto fail; | |
401 | } | |
402 | ||
403 | ret = drm_atomic_commit(state); | |
bbb1e524 RC |
404 | |
405 | fail: | |
f72c6b33 | 406 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
94284037 | 407 | |
bbb1e524 RC |
408 | if (ret == -EDEADLK) |
409 | goto backoff; | |
410 | ||
0853695c | 411 | drm_atomic_state_put(state); |
bbb1e524 RC |
412 | return ret; |
413 | ||
414 | backoff: | |
415 | drm_atomic_state_clear(state); | |
416 | drm_atomic_legacy_backoff(state); | |
417 | ||
418 | goto retry; | |
419 | } | |
420 | ||
b7bdf0a8 | 421 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 422 | { |
3858bc5d VS |
423 | struct drm_device *dev = fb_helper->dev; |
424 | struct drm_plane *plane; | |
3858bc5d VS |
425 | int i; |
426 | ||
427 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 428 | |
a743d758 | 429 | if (drm_drv_uses_atomic_modeset(dev)) |
bbb1e524 RC |
430 | return restore_fbdev_mode_atomic(fb_helper); |
431 | ||
6295d607 | 432 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
433 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
434 | drm_plane_force_disable(plane); | |
6aed8ec3 | 435 | |
6686df8c | 436 | if (plane->rotation_property) |
d138dd3c VS |
437 | drm_mode_plane_set_obj_prop(plane, |
438 | plane->rotation_property, | |
439 | DRM_ROTATE_0); | |
9783de20 SJ |
440 | } |
441 | ||
e8e7a2b8 DA |
442 | for (i = 0; i < fb_helper->crtc_count; i++) { |
443 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
444 | struct drm_crtc *crtc = mode_set->crtc; |
445 | int ret; | |
446 | ||
03f9abb2 AD |
447 | if (crtc->funcs->cursor_set2) { |
448 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
449 | if (ret) | |
48f87dd1 | 450 | return ret; |
03f9abb2 | 451 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
452 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
453 | if (ret) | |
b7bdf0a8 | 454 | return ret; |
3858bc5d VS |
455 | } |
456 | ||
2d13b679 | 457 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 458 | if (ret) |
b7bdf0a8 | 459 | return ret; |
e8e7a2b8 | 460 | } |
b7bdf0a8 DV |
461 | |
462 | return 0; | |
e8e7a2b8 | 463 | } |
5ea1f752 RC |
464 | |
465 | /** | |
466 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
467 | * @fb_helper: fbcon to restore | |
468 | * | |
6806cdf9 | 469 | * This should be called from driver's drm &drm_driver.lastclose callback |
5ea1f752 RC |
470 | * when implementing an fbcon on top of kms using this helper. This ensures that |
471 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
472 | * |
473 | * RETURNS: | |
474 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 475 | */ |
b7bdf0a8 | 476 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
477 | { |
478 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
479 | bool do_delayed; |
480 | int ret; | |
e2809c7d | 481 | |
f64c5573 DV |
482 | if (!drm_fbdev_emulation) |
483 | return -ENODEV; | |
484 | ||
5ea1f752 RC |
485 | drm_modeset_lock_all(dev); |
486 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
487 | |
488 | do_delayed = fb_helper->delayed_hotplug; | |
489 | if (do_delayed) | |
490 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 491 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
492 | |
493 | if (do_delayed) | |
494 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
495 | return ret; |
496 | } | |
497 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 498 | |
2c4124fd GU |
499 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
500 | { | |
501 | struct drm_device *dev = fb_helper->dev; | |
502 | struct drm_crtc *crtc; | |
503 | int bound = 0, crtcs_bound = 0; | |
504 | ||
4b4f99f5 TR |
505 | /* |
506 | * Sometimes user space wants everything disabled, so don't steal the | |
507 | * display if there's a master. | |
508 | */ | |
f17b3ea3 | 509 | if (READ_ONCE(dev->master)) |
2c4124fd GU |
510 | return false; |
511 | ||
512 | drm_for_each_crtc(crtc, dev) { | |
513 | if (crtc->primary->fb) | |
514 | crtcs_bound++; | |
515 | if (crtc->primary->fb == fb_helper->fb) | |
516 | bound++; | |
517 | } | |
518 | ||
519 | if (bound < crtcs_bound) | |
520 | return false; | |
521 | ||
522 | return true; | |
523 | } | |
524 | ||
525 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
526 | /* |
527 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
528 | * and panic handling. | |
529 | */ | |
78b9c353 | 530 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 531 | { |
785b93ef DA |
532 | bool ret, error = false; |
533 | struct drm_fb_helper *helper; | |
534 | ||
535 | if (list_empty(&kernel_fb_helper_list)) | |
536 | return false; | |
537 | ||
538 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
539 | struct drm_device *dev = helper->dev; |
540 | ||
541 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
542 | continue; | |
543 | ||
dd908c86 | 544 | drm_modeset_lock_all(dev); |
3d9e35a9 | 545 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
546 | if (ret) |
547 | error = true; | |
cb597bb3 | 548 | drm_modeset_unlock_all(dev); |
785b93ef DA |
549 | } |
550 | return error; | |
551 | } | |
552 | ||
785b93ef DA |
553 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
554 | { | |
d21bf469 | 555 | bool ret; |
4b4f99f5 | 556 | |
d21bf469 DV |
557 | ret = drm_fb_helper_force_kernel_mode(); |
558 | if (ret == true) | |
559 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
560 | } |
561 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
562 | ||
1495cc9d | 563 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
564 | { |
565 | schedule_work(&drm_fb_helper_restore_work); | |
566 | } | |
567 | ||
568 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
569 | .handler = drm_fb_helper_sysrq, | |
570 | .help_msg = "force-fb(V)", | |
571 | .action_msg = "Restore framebuffer console", | |
572 | }; | |
b8c40d62 RD |
573 | #else |
574 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 575 | #endif |
785b93ef | 576 | |
3a8148c5 | 577 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
578 | { |
579 | struct drm_fb_helper *fb_helper = info->par; | |
580 | struct drm_device *dev = fb_helper->dev; | |
581 | struct drm_crtc *crtc; | |
023eb571 | 582 | struct drm_connector *connector; |
023eb571 | 583 | int i, j; |
785b93ef DA |
584 | |
585 | /* | |
3a8148c5 | 586 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 587 | */ |
84849903 | 588 | drm_modeset_lock_all(dev); |
20c60c35 DV |
589 | if (!drm_fb_helper_is_bound(fb_helper)) { |
590 | drm_modeset_unlock_all(dev); | |
591 | return; | |
592 | } | |
593 | ||
e87b2c42 | 594 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 595 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 596 | |
8be48d92 DA |
597 | if (!crtc->enabled) |
598 | continue; | |
599 | ||
3a8148c5 | 600 | /* Walk the connectors & encoders on this fb turning them on/off */ |
966a6a13 | 601 | drm_fb_helper_for_each_connector(fb_helper, j) { |
023eb571 | 602 | connector = fb_helper->connector_info[j]->connector; |
e04190e0 | 603 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 604 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 605 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 606 | } |
785b93ef | 607 | } |
84849903 | 608 | drm_modeset_unlock_all(dev); |
785b93ef DA |
609 | } |
610 | ||
207fd329 | 611 | /** |
6806cdf9 | 612 | * drm_fb_helper_blank - implementation for &fb_ops.fb_blank |
207fd329 DV |
613 | * @blank: desired blanking state |
614 | * @info: fbdev registered by the helper | |
615 | */ | |
785b93ef DA |
616 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
617 | { | |
c50bfd08 DV |
618 | if (oops_in_progress) |
619 | return -EBUSY; | |
620 | ||
785b93ef | 621 | switch (blank) { |
731b5a15 | 622 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 623 | case FB_BLANK_UNBLANK: |
3a8148c5 | 624 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 625 | break; |
731b5a15 | 626 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 627 | case FB_BLANK_NORMAL: |
3a8148c5 | 628 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 629 | break; |
731b5a15 | 630 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 631 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 632 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 633 | break; |
731b5a15 | 634 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 635 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 636 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 637 | break; |
731b5a15 | 638 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 639 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 640 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
641 | break; |
642 | } | |
643 | return 0; | |
644 | } | |
645 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
646 | ||
a2889606 VS |
647 | static void drm_fb_helper_modeset_release(struct drm_fb_helper *helper, |
648 | struct drm_mode_set *modeset) | |
649 | { | |
650 | int i; | |
651 | ||
652 | for (i = 0; i < modeset->num_connectors; i++) { | |
ad093607 | 653 | drm_connector_put(modeset->connectors[i]); |
a2889606 VS |
654 | modeset->connectors[i] = NULL; |
655 | } | |
656 | modeset->num_connectors = 0; | |
657 | ||
658 | drm_mode_destroy(helper->dev, modeset->mode); | |
659 | modeset->mode = NULL; | |
660 | ||
661 | /* FIXME should hold a ref? */ | |
662 | modeset->fb = NULL; | |
663 | } | |
664 | ||
785b93ef DA |
665 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) |
666 | { | |
667 | int i; | |
668 | ||
6e86d58b | 669 | for (i = 0; i < helper->connector_count; i++) { |
ad093607 | 670 | drm_connector_put(helper->connector_info[i]->connector); |
0b4c0f3f | 671 | kfree(helper->connector_info[i]); |
6e86d58b | 672 | } |
0b4c0f3f | 673 | kfree(helper->connector_info); |
a2889606 | 674 | |
a1b7736d | 675 | for (i = 0; i < helper->crtc_count; i++) { |
a2889606 VS |
676 | struct drm_mode_set *modeset = &helper->crtc_info[i].mode_set; |
677 | ||
678 | drm_fb_helper_modeset_release(helper, modeset); | |
679 | kfree(modeset->connectors); | |
a1b7736d | 680 | } |
785b93ef DA |
681 | kfree(helper->crtc_info); |
682 | } | |
683 | ||
cfe63423 NT |
684 | static void drm_fb_helper_resume_worker(struct work_struct *work) |
685 | { | |
686 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
687 | resume_work); | |
688 | ||
689 | console_lock(); | |
690 | fb_set_suspend(helper->fbdev, 0); | |
691 | console_unlock(); | |
692 | } | |
693 | ||
eaa434de NT |
694 | static void drm_fb_helper_dirty_work(struct work_struct *work) |
695 | { | |
696 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
697 | dirty_work); | |
698 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
699 | struct drm_clip_rect clip_copy; | |
700 | unsigned long flags; | |
701 | ||
702 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
703 | clip_copy = *clip; | |
704 | clip->x1 = clip->y1 = ~0; | |
705 | clip->x2 = clip->y2 = 0; | |
706 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
707 | ||
87d3b658 TI |
708 | /* call dirty callback only when it has been really touched */ |
709 | if (clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2) | |
710 | helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); | |
eaa434de NT |
711 | } |
712 | ||
10a23102 TR |
713 | /** |
714 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
715 | * @dev: DRM device | |
716 | * @helper: driver-allocated fbdev helper structure to set up | |
717 | * @funcs: pointer to structure of functions associate with this helper | |
718 | * | |
719 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
720 | * useful to implement race-free initialization of the polling helpers. | |
721 | */ | |
722 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
723 | const struct drm_fb_helper_funcs *funcs) | |
724 | { | |
725 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
eaa434de | 726 | spin_lock_init(&helper->dirty_lock); |
cfe63423 | 727 | INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker); |
eaa434de NT |
728 | INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work); |
729 | helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0; | |
10a23102 TR |
730 | helper->funcs = funcs; |
731 | helper->dev = dev; | |
732 | } | |
733 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
734 | ||
207fd329 | 735 | /** |
ed84e254 | 736 | * drm_fb_helper_init - initialize a &struct drm_fb_helper |
207fd329 DV |
737 | * @dev: drm device |
738 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
207fd329 DV |
739 | * @max_conn_count: max connector count |
740 | * | |
741 | * This allocates the structures for the fbdev helper with the given limits. | |
742 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
743 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
744 | * to allow driver writes more control over the exact init sequence. | |
745 | * | |
10a23102 | 746 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
747 | * |
748 | * RETURNS: | |
749 | * Zero if everything went ok, nonzero otherwise. | |
750 | */ | |
4abe3520 DA |
751 | int drm_fb_helper_init(struct drm_device *dev, |
752 | struct drm_fb_helper *fb_helper, | |
e4563f6b | 753 | int max_conn_count) |
785b93ef | 754 | { |
785b93ef | 755 | struct drm_crtc *crtc; |
e4563f6b | 756 | struct drm_mode_config *config = &dev->mode_config; |
785b93ef DA |
757 | int i; |
758 | ||
f64c5573 DV |
759 | if (!drm_fbdev_emulation) |
760 | return 0; | |
761 | ||
04cfe97e XL |
762 | if (!max_conn_count) |
763 | return -EINVAL; | |
764 | ||
e4563f6b | 765 | fb_helper->crtc_info = kcalloc(config->num_crtc, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
4abe3520 | 766 | if (!fb_helper->crtc_info) |
785b93ef DA |
767 | return -ENOMEM; |
768 | ||
e4563f6b | 769 | fb_helper->crtc_count = config->num_crtc; |
4abe3520 DA |
770 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); |
771 | if (!fb_helper->connector_info) { | |
772 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
773 | return -ENOMEM; |
774 | } | |
65c2a89c | 775 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 776 | fb_helper->connector_count = 0; |
785b93ef | 777 | |
e4563f6b | 778 | for (i = 0; i < fb_helper->crtc_count; i++) { |
4abe3520 | 779 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
780 | kcalloc(max_conn_count, |
781 | sizeof(struct drm_connector *), | |
782 | GFP_KERNEL); | |
783 | ||
4a1b0714 | 784 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 785 | goto out_free; |
4abe3520 | 786 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
787 | } |
788 | ||
789 | i = 0; | |
6295d607 | 790 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 791 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
792 | i++; |
793 | } | |
e9ad3181 | 794 | |
785b93ef DA |
795 | return 0; |
796 | out_free: | |
4abe3520 | 797 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
798 | return -ENOMEM; |
799 | } | |
4abe3520 DA |
800 | EXPORT_SYMBOL(drm_fb_helper_init); |
801 | ||
b8017d6c AT |
802 | /** |
803 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
804 | * @fb_helper: driver-allocated fbdev helper | |
805 | * | |
806 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
da7bdda2 DV |
807 | * by the driver within the fb_probe fb_helper callback function. Drivers do not |
808 | * need to release the allocated fb_info structure themselves, this is | |
809 | * automatically done when calling drm_fb_helper_fini(). | |
b8017d6c AT |
810 | * |
811 | * RETURNS: | |
812 | * fb_info pointer if things went okay, pointer containing error code | |
813 | * otherwise | |
814 | */ | |
815 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
816 | { | |
817 | struct device *dev = fb_helper->dev->dev; | |
818 | struct fb_info *info; | |
819 | int ret; | |
820 | ||
821 | info = framebuffer_alloc(0, dev); | |
822 | if (!info) | |
823 | return ERR_PTR(-ENOMEM); | |
824 | ||
825 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
826 | if (ret) | |
827 | goto err_release; | |
828 | ||
829 | info->apertures = alloc_apertures(1); | |
830 | if (!info->apertures) { | |
831 | ret = -ENOMEM; | |
832 | goto err_free_cmap; | |
833 | } | |
834 | ||
835 | fb_helper->fbdev = info; | |
836 | ||
837 | return info; | |
838 | ||
839 | err_free_cmap: | |
840 | fb_dealloc_cmap(&info->cmap); | |
841 | err_release: | |
842 | framebuffer_release(info); | |
843 | return ERR_PTR(ret); | |
844 | } | |
845 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
846 | ||
847 | /** | |
848 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
849 | * @fb_helper: driver-allocated fbdev helper | |
850 | * | |
851 | * A wrapper around unregister_framebuffer, to release the fb_info | |
ed84e254 DV |
852 | * framebuffer device. This must be called before releasing all resources for |
853 | * @fb_helper by calling drm_fb_helper_fini(). | |
b8017d6c AT |
854 | */ |
855 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
856 | { | |
857 | if (fb_helper && fb_helper->fbdev) | |
858 | unregister_framebuffer(fb_helper->fbdev); | |
859 | } | |
860 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
861 | ||
ed84e254 DV |
862 | /** |
863 | * drm_fb_helper_fini - finialize a &struct drm_fb_helper | |
864 | * @fb_helper: driver-allocated fbdev helper | |
865 | * | |
866 | * This cleans up all remaining resources associated with @fb_helper. Must be | |
867 | * called after drm_fb_helper_unlink_fbi() was called. | |
868 | */ | |
4abe3520 DA |
869 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
870 | { | |
da7bdda2 DV |
871 | struct fb_info *info; |
872 | ||
873 | if (!drm_fbdev_emulation || !fb_helper) | |
f64c5573 DV |
874 | return; |
875 | ||
da7bdda2 DV |
876 | info = fb_helper->fbdev; |
877 | if (info) { | |
878 | if (info->cmap.len) | |
879 | fb_dealloc_cmap(&info->cmap); | |
880 | framebuffer_release(info); | |
881 | } | |
882 | fb_helper->fbdev = NULL; | |
883 | ||
24f76b2c | 884 | cancel_work_sync(&fb_helper->resume_work); |
f21b9a92 CW |
885 | cancel_work_sync(&fb_helper->dirty_work); |
886 | ||
a53ca635 | 887 | mutex_lock(&kernel_fb_helper_lock); |
4abe3520 DA |
888 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
889 | list_del(&fb_helper->kernel_fb_list); | |
4b4f99f5 | 890 | if (list_empty(&kernel_fb_helper_list)) |
4abe3520 | 891 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
4abe3520 | 892 | } |
a53ca635 | 893 | mutex_unlock(&kernel_fb_helper_lock); |
4abe3520 DA |
894 | |
895 | drm_fb_helper_crtc_free(fb_helper); | |
896 | ||
4abe3520 DA |
897 | } |
898 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 899 | |
47074ab7 AT |
900 | /** |
901 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
902 | * @fb_helper: driver-allocated fbdev helper | |
903 | * | |
904 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
905 | */ | |
906 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
907 | { | |
908 | if (fb_helper && fb_helper->fbdev) | |
909 | unlink_framebuffer(fb_helper->fbdev); | |
910 | } | |
911 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
912 | ||
eaa434de NT |
913 | static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y, |
914 | u32 width, u32 height) | |
915 | { | |
916 | struct drm_fb_helper *helper = info->par; | |
917 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
918 | unsigned long flags; | |
919 | ||
920 | if (!helper->fb->funcs->dirty) | |
921 | return; | |
922 | ||
923 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
924 | clip->x1 = min_t(u32, clip->x1, x); | |
925 | clip->y1 = min_t(u32, clip->y1, y); | |
926 | clip->x2 = max_t(u32, clip->x2, x + width); | |
927 | clip->y2 = max_t(u32, clip->y2, y + height); | |
928 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
929 | ||
930 | schedule_work(&helper->dirty_work); | |
931 | } | |
932 | ||
933 | /** | |
934 | * drm_fb_helper_deferred_io() - fbdev deferred_io callback function | |
935 | * @info: fb_info struct pointer | |
936 | * @pagelist: list of dirty mmap framebuffer pages | |
937 | * | |
6806cdf9 | 938 | * This function is used as the &fb_deferred_io.deferred_io |
eaa434de NT |
939 | * callback function for flushing the fbdev mmap writes. |
940 | */ | |
941 | void drm_fb_helper_deferred_io(struct fb_info *info, | |
942 | struct list_head *pagelist) | |
943 | { | |
944 | unsigned long start, end, min, max; | |
945 | struct page *page; | |
946 | u32 y1, y2; | |
947 | ||
948 | min = ULONG_MAX; | |
949 | max = 0; | |
950 | list_for_each_entry(page, pagelist, lru) { | |
951 | start = page->index << PAGE_SHIFT; | |
952 | end = start + PAGE_SIZE - 1; | |
953 | min = min(min, start); | |
954 | max = max(max, end); | |
955 | } | |
956 | ||
957 | if (min < max) { | |
958 | y1 = min / info->fix.line_length; | |
959 | y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length), | |
960 | info->var.yres); | |
961 | drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1); | |
962 | } | |
963 | } | |
964 | EXPORT_SYMBOL(drm_fb_helper_deferred_io); | |
965 | ||
cbb1a82e AT |
966 | /** |
967 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
968 | * @info: fb_info struct pointer | |
969 | * @buf: userspace buffer to read from framebuffer memory | |
970 | * @count: number of bytes to read from framebuffer memory | |
971 | * @ppos: read offset within framebuffer memory | |
972 | * | |
973 | * A wrapper around fb_sys_read implemented by fbdev core | |
974 | */ | |
975 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
976 | size_t count, loff_t *ppos) | |
977 | { | |
978 | return fb_sys_read(info, buf, count, ppos); | |
979 | } | |
980 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
981 | ||
982 | /** | |
983 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
984 | * @info: fb_info struct pointer | |
985 | * @buf: userspace buffer to write to framebuffer memory | |
986 | * @count: number of bytes to write to framebuffer memory | |
987 | * @ppos: write offset within framebuffer memory | |
988 | * | |
989 | * A wrapper around fb_sys_write implemented by fbdev core | |
990 | */ | |
991 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
992 | size_t count, loff_t *ppos) | |
993 | { | |
eaa434de NT |
994 | ssize_t ret; |
995 | ||
996 | ret = fb_sys_write(info, buf, count, ppos); | |
997 | if (ret > 0) | |
998 | drm_fb_helper_dirty(info, 0, 0, info->var.xres, | |
999 | info->var.yres); | |
1000 | ||
1001 | return ret; | |
cbb1a82e AT |
1002 | } |
1003 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
1004 | ||
742547b7 AT |
1005 | /** |
1006 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
1007 | * @info: fbdev registered by the helper | |
1008 | * @rect: info about rectangle to fill | |
1009 | * | |
1010 | * A wrapper around sys_fillrect implemented by fbdev core | |
1011 | */ | |
1012 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
1013 | const struct fb_fillrect *rect) | |
1014 | { | |
1015 | sys_fillrect(info, rect); | |
eaa434de NT |
1016 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
1017 | rect->width, rect->height); | |
742547b7 AT |
1018 | } |
1019 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
1020 | ||
1021 | /** | |
1022 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
1023 | * @info: fbdev registered by the helper | |
1024 | * @area: info about area to copy | |
1025 | * | |
1026 | * A wrapper around sys_copyarea implemented by fbdev core | |
1027 | */ | |
1028 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
1029 | const struct fb_copyarea *area) | |
1030 | { | |
1031 | sys_copyarea(info, area); | |
eaa434de NT |
1032 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1033 | area->width, area->height); | |
742547b7 AT |
1034 | } |
1035 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
1036 | ||
1037 | /** | |
1038 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
1039 | * @info: fbdev registered by the helper | |
1040 | * @image: info about image to blit | |
1041 | * | |
1042 | * A wrapper around sys_imageblit implemented by fbdev core | |
1043 | */ | |
1044 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
1045 | const struct fb_image *image) | |
1046 | { | |
1047 | sys_imageblit(info, image); | |
eaa434de NT |
1048 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1049 | image->width, image->height); | |
742547b7 AT |
1050 | } |
1051 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
1052 | ||
1053 | /** | |
1054 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
1055 | * @info: fbdev registered by the helper | |
1056 | * @rect: info about rectangle to fill | |
1057 | * | |
1058 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1059 | */ | |
1060 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
1061 | const struct fb_fillrect *rect) | |
1062 | { | |
1063 | cfb_fillrect(info, rect); | |
eaa434de NT |
1064 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
1065 | rect->width, rect->height); | |
742547b7 AT |
1066 | } |
1067 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
1068 | ||
1069 | /** | |
1070 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
1071 | * @info: fbdev registered by the helper | |
1072 | * @area: info about area to copy | |
1073 | * | |
1074 | * A wrapper around cfb_copyarea implemented by fbdev core | |
1075 | */ | |
1076 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
1077 | const struct fb_copyarea *area) | |
1078 | { | |
1079 | cfb_copyarea(info, area); | |
eaa434de NT |
1080 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1081 | area->width, area->height); | |
742547b7 AT |
1082 | } |
1083 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
1084 | ||
1085 | /** | |
1086 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
1087 | * @info: fbdev registered by the helper | |
1088 | * @image: info about image to blit | |
1089 | * | |
1090 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1091 | */ | |
1092 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
1093 | const struct fb_image *image) | |
1094 | { | |
1095 | cfb_imageblit(info, image); | |
eaa434de NT |
1096 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1097 | image->width, image->height); | |
742547b7 AT |
1098 | } |
1099 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
1100 | ||
fdefa58a AT |
1101 | /** |
1102 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
1103 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1104 | * @suspend: whether to suspend or resume |
fdefa58a | 1105 | * |
cfe63423 NT |
1106 | * A wrapper around fb_set_suspend implemented by fbdev core. |
1107 | * Use drm_fb_helper_set_suspend_unlocked() if you don't need to take | |
1108 | * the lock yourself | |
fdefa58a | 1109 | */ |
28579f37 | 1110 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend) |
fdefa58a AT |
1111 | { |
1112 | if (fb_helper && fb_helper->fbdev) | |
28579f37 | 1113 | fb_set_suspend(fb_helper->fbdev, suspend); |
fdefa58a AT |
1114 | } |
1115 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
1116 | ||
cfe63423 NT |
1117 | /** |
1118 | * drm_fb_helper_set_suspend_unlocked - wrapper around fb_set_suspend that also | |
1119 | * takes the console lock | |
1120 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1121 | * @suspend: whether to suspend or resume |
cfe63423 NT |
1122 | * |
1123 | * A wrapper around fb_set_suspend() that takes the console lock. If the lock | |
1124 | * isn't available on resume, a worker is tasked with waiting for the lock | |
1125 | * to become available. The console lock can be pretty contented on resume | |
1126 | * due to all the printk activity. | |
1127 | * | |
1128 | * This function can be called multiple times with the same state since | |
6806cdf9 | 1129 | * &fb_info.state is checked to see if fbdev is running or not before locking. |
cfe63423 NT |
1130 | * |
1131 | * Use drm_fb_helper_set_suspend() if you need to take the lock yourself. | |
1132 | */ | |
1133 | void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, | |
28579f37 | 1134 | bool suspend) |
cfe63423 NT |
1135 | { |
1136 | if (!fb_helper || !fb_helper->fbdev) | |
1137 | return; | |
1138 | ||
1139 | /* make sure there's no pending/ongoing resume */ | |
1140 | flush_work(&fb_helper->resume_work); | |
1141 | ||
1142 | if (suspend) { | |
1143 | if (fb_helper->fbdev->state != FBINFO_STATE_RUNNING) | |
1144 | return; | |
1145 | ||
1146 | console_lock(); | |
1147 | ||
1148 | } else { | |
1149 | if (fb_helper->fbdev->state == FBINFO_STATE_RUNNING) | |
1150 | return; | |
1151 | ||
1152 | if (!console_trylock()) { | |
1153 | schedule_work(&fb_helper->resume_work); | |
1154 | return; | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | fb_set_suspend(fb_helper->fbdev, suspend); | |
1159 | console_unlock(); | |
1160 | } | |
1161 | EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked); | |
1162 | ||
c850cb78 | 1163 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
1164 | u16 blue, u16 regno, struct fb_info *info) |
1165 | { | |
1166 | struct drm_fb_helper *fb_helper = info->par; | |
1167 | struct drm_framebuffer *fb = fb_helper->fb; | |
b8c00ac5 | 1168 | |
c850cb78 DA |
1169 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
1170 | u32 *palette; | |
1171 | u32 value; | |
1172 | /* place color in psuedopalette */ | |
1173 | if (regno > 16) | |
1174 | return -EINVAL; | |
1175 | palette = (u32 *)info->pseudo_palette; | |
1176 | red >>= (16 - info->var.red.length); | |
1177 | green >>= (16 - info->var.green.length); | |
1178 | blue >>= (16 - info->var.blue.length); | |
1179 | value = (red << info->var.red.offset) | | |
1180 | (green << info->var.green.offset) | | |
1181 | (blue << info->var.blue.offset); | |
9da12b6a RC |
1182 | if (info->var.transp.length > 0) { |
1183 | u32 mask = (1 << info->var.transp.length) - 1; | |
4b4f99f5 | 1184 | |
9da12b6a RC |
1185 | mask <<= info->var.transp.offset; |
1186 | value |= mask; | |
1187 | } | |
c850cb78 DA |
1188 | palette[regno] = value; |
1189 | return 0; | |
1190 | } | |
1191 | ||
04c0c569 VS |
1192 | /* |
1193 | * The driver really shouldn't advertise pseudo/directcolor | |
1194 | * visuals if it can't deal with the palette. | |
1195 | */ | |
1196 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1197 | !fb_helper->funcs->gamma_get)) | |
1198 | return -EINVAL; | |
1199 | ||
272725c7 | 1200 | WARN_ON(fb->format->cpp[0] != 1); |
b8c00ac5 | 1201 | |
fef1480d | 1202 | fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); |
b8c00ac5 | 1203 | |
c850cb78 | 1204 | return 0; |
b8c00ac5 DA |
1205 | } |
1206 | ||
207fd329 | 1207 | /** |
6806cdf9 | 1208 | * drm_fb_helper_setcmap - implementation for &fb_ops.fb_setcmap |
207fd329 DV |
1209 | * @cmap: cmap to set |
1210 | * @info: fbdev registered by the helper | |
1211 | */ | |
068143d3 DA |
1212 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1213 | { | |
1214 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1215 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1216 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1217 | u16 *red, *green, *blue, *transp; |
1218 | struct drm_crtc *crtc; | |
062ac622 | 1219 | int i, j, rc = 0; |
068143d3 DA |
1220 | int start; |
1221 | ||
c50bfd08 | 1222 | if (oops_in_progress) |
9aa609e1 | 1223 | return -EBUSY; |
c50bfd08 DV |
1224 | |
1225 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1226 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1227 | drm_modeset_unlock_all(dev); | |
1228 | return -EBUSY; | |
1229 | } | |
1230 | ||
8be48d92 DA |
1231 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1232 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1233 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1234 | |
1235 | red = cmap->red; | |
1236 | green = cmap->green; | |
1237 | blue = cmap->blue; | |
1238 | transp = cmap->transp; | |
1239 | start = cmap->start; | |
1240 | ||
062ac622 | 1241 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1242 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1243 | ||
1244 | hred = *red++; | |
1245 | hgreen = *green++; | |
1246 | hblue = *blue++; | |
1247 | ||
1248 | if (transp) | |
1249 | htransp = *transp++; | |
1250 | ||
c850cb78 DA |
1251 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1252 | if (rc) | |
8391a3d5 | 1253 | goto out; |
068143d3 | 1254 | } |
04c0c569 VS |
1255 | if (crtc_funcs->load_lut) |
1256 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1257 | } |
8391a3d5 VS |
1258 | out: |
1259 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1260 | return rc; |
1261 | } | |
1262 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1263 | ||
0f3bbe07 MR |
1264 | /** |
1265 | * drm_fb_helper_ioctl - legacy ioctl implementation | |
1266 | * @info: fbdev registered by the helper | |
1267 | * @cmd: ioctl command | |
1268 | * @arg: ioctl argument | |
1269 | * | |
1270 | * A helper to implement the standard fbdev ioctl. Only | |
1271 | * FBIO_WAITFORVSYNC is implemented for now. | |
1272 | */ | |
1273 | int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd, | |
1274 | unsigned long arg) | |
1275 | { | |
1276 | struct drm_fb_helper *fb_helper = info->par; | |
1277 | struct drm_device *dev = fb_helper->dev; | |
1278 | struct drm_mode_set *mode_set; | |
1279 | struct drm_crtc *crtc; | |
1280 | int ret = 0; | |
1281 | ||
1282 | mutex_lock(&dev->mode_config.mutex); | |
1283 | if (!drm_fb_helper_is_bound(fb_helper)) { | |
1284 | ret = -EBUSY; | |
1285 | goto unlock; | |
1286 | } | |
1287 | ||
1288 | switch (cmd) { | |
1289 | case FBIO_WAITFORVSYNC: | |
1290 | /* | |
1291 | * Only consider the first CRTC. | |
1292 | * | |
1293 | * This ioctl is supposed to take the CRTC number as | |
1294 | * an argument, but in fbdev times, what that number | |
1295 | * was supposed to be was quite unclear, different | |
1296 | * drivers were passing that argument differently | |
1297 | * (some by reference, some by value), and most of the | |
1298 | * userspace applications were just hardcoding 0 as an | |
1299 | * argument. | |
1300 | * | |
1301 | * The first CRTC should be the integrated panel on | |
1302 | * most drivers, so this is the best choice we can | |
1303 | * make. If we're not smart enough here, one should | |
1304 | * just consider switch the userspace to KMS. | |
1305 | */ | |
1306 | mode_set = &fb_helper->crtc_info[0].mode_set; | |
1307 | crtc = mode_set->crtc; | |
1308 | ||
1309 | /* | |
1310 | * Only wait for a vblank event if the CRTC is | |
1311 | * enabled, otherwise just don't do anythintg, | |
1312 | * not even report an error. | |
1313 | */ | |
1314 | ret = drm_crtc_vblank_get(crtc); | |
1315 | if (!ret) { | |
1316 | drm_crtc_wait_one_vblank(crtc); | |
1317 | drm_crtc_vblank_put(crtc); | |
1318 | } | |
1319 | ||
1320 | ret = 0; | |
1321 | goto unlock; | |
1322 | default: | |
1323 | ret = -ENOTTY; | |
1324 | } | |
1325 | ||
1326 | unlock: | |
1327 | mutex_unlock(&dev->mode_config.mutex); | |
1328 | return ret; | |
1329 | } | |
1330 | EXPORT_SYMBOL(drm_fb_helper_ioctl); | |
1331 | ||
207fd329 | 1332 | /** |
6806cdf9 | 1333 | * drm_fb_helper_check_var - implementation for &fb_ops.fb_check_var |
207fd329 DV |
1334 | * @var: screeninfo to check |
1335 | * @info: fbdev registered by the helper | |
1336 | */ | |
785b93ef DA |
1337 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1338 | struct fb_info *info) | |
1339 | { | |
1340 | struct drm_fb_helper *fb_helper = info->par; | |
1341 | struct drm_framebuffer *fb = fb_helper->fb; | |
1342 | int depth; | |
1343 | ||
f90ebd9e | 1344 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1345 | return -EINVAL; |
1346 | ||
865afb11 SA |
1347 | /* |
1348 | * Changes struct fb_var_screeninfo are currently not pushed back | |
1349 | * to KMS, hence fail if different settings are requested. | |
1350 | */ | |
272725c7 | 1351 | if (var->bits_per_pixel != fb->format->cpp[0] * 8 || |
12ffed96 MD |
1352 | var->xres > fb->width || var->yres > fb->height || |
1353 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
1354 | DRM_DEBUG("fb requested width/height/bpp can't fit in current fb " | |
62fb376e CW |
1355 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1356 | var->xres, var->yres, var->bits_per_pixel, | |
1357 | var->xres_virtual, var->yres_virtual, | |
272725c7 | 1358 | fb->width, fb->height, fb->format->cpp[0] * 8); |
785b93ef DA |
1359 | return -EINVAL; |
1360 | } | |
1361 | ||
1362 | switch (var->bits_per_pixel) { | |
1363 | case 16: | |
1364 | depth = (var->green.length == 6) ? 16 : 15; | |
1365 | break; | |
1366 | case 32: | |
1367 | depth = (var->transp.length > 0) ? 32 : 24; | |
1368 | break; | |
1369 | default: | |
1370 | depth = var->bits_per_pixel; | |
1371 | break; | |
1372 | } | |
1373 | ||
1374 | switch (depth) { | |
1375 | case 8: | |
1376 | var->red.offset = 0; | |
1377 | var->green.offset = 0; | |
1378 | var->blue.offset = 0; | |
1379 | var->red.length = 8; | |
1380 | var->green.length = 8; | |
1381 | var->blue.length = 8; | |
1382 | var->transp.length = 0; | |
1383 | var->transp.offset = 0; | |
1384 | break; | |
1385 | case 15: | |
1386 | var->red.offset = 10; | |
1387 | var->green.offset = 5; | |
1388 | var->blue.offset = 0; | |
1389 | var->red.length = 5; | |
1390 | var->green.length = 5; | |
1391 | var->blue.length = 5; | |
1392 | var->transp.length = 1; | |
1393 | var->transp.offset = 15; | |
1394 | break; | |
1395 | case 16: | |
1396 | var->red.offset = 11; | |
1397 | var->green.offset = 5; | |
1398 | var->blue.offset = 0; | |
1399 | var->red.length = 5; | |
1400 | var->green.length = 6; | |
1401 | var->blue.length = 5; | |
1402 | var->transp.length = 0; | |
1403 | var->transp.offset = 0; | |
1404 | break; | |
1405 | case 24: | |
1406 | var->red.offset = 16; | |
1407 | var->green.offset = 8; | |
1408 | var->blue.offset = 0; | |
1409 | var->red.length = 8; | |
1410 | var->green.length = 8; | |
1411 | var->blue.length = 8; | |
1412 | var->transp.length = 0; | |
1413 | var->transp.offset = 0; | |
1414 | break; | |
1415 | case 32: | |
1416 | var->red.offset = 16; | |
1417 | var->green.offset = 8; | |
1418 | var->blue.offset = 0; | |
1419 | var->red.length = 8; | |
1420 | var->green.length = 8; | |
1421 | var->blue.length = 8; | |
1422 | var->transp.length = 8; | |
1423 | var->transp.offset = 24; | |
1424 | break; | |
1425 | default: | |
1426 | return -EINVAL; | |
1427 | } | |
1428 | return 0; | |
1429 | } | |
1430 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1431 | ||
207fd329 | 1432 | /** |
6806cdf9 | 1433 | * drm_fb_helper_set_par - implementation for &fb_ops.fb_set_par |
207fd329 DV |
1434 | * @info: fbdev registered by the helper |
1435 | * | |
1436 | * This will let fbcon do the mode init and is called at initialization time by | |
1437 | * the fbdev core when registering the driver, and later on through the hotplug | |
1438 | * callback. | |
1439 | */ | |
785b93ef DA |
1440 | int drm_fb_helper_set_par(struct fb_info *info) |
1441 | { | |
1442 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1443 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1444 | |
c50bfd08 DV |
1445 | if (oops_in_progress) |
1446 | return -EBUSY; | |
1447 | ||
5349ef31 | 1448 | if (var->pixclock != 0) { |
172e91f5 | 1449 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1450 | return -EINVAL; |
1451 | } | |
1452 | ||
5ea1f752 | 1453 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1454 | |
785b93ef DA |
1455 | return 0; |
1456 | } | |
1457 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1458 | ||
1edf0269 | 1459 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1460 | struct fb_info *info) |
1edf0269 RC |
1461 | { |
1462 | struct drm_fb_helper *fb_helper = info->par; | |
1463 | struct drm_device *dev = fb_helper->dev; | |
1464 | struct drm_atomic_state *state; | |
07d3bad6 | 1465 | struct drm_plane *plane; |
1edf0269 | 1466 | int i, ret; |
4b4f99f5 | 1467 | unsigned int plane_mask; |
1edf0269 RC |
1468 | |
1469 | state = drm_atomic_state_alloc(dev); | |
1470 | if (!state) | |
1471 | return -ENOMEM; | |
1472 | ||
1473 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1474 | retry: | |
07d3bad6 | 1475 | plane_mask = 0; |
4b4f99f5 | 1476 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1edf0269 RC |
1477 | struct drm_mode_set *mode_set; |
1478 | ||
1479 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1480 | ||
1481 | mode_set->x = var->xoffset; | |
1482 | mode_set->y = var->yoffset; | |
1483 | ||
1484 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1485 | if (ret != 0) | |
1486 | goto fail; | |
07d3bad6 ML |
1487 | |
1488 | plane = mode_set->crtc->primary; | |
7118fd9b | 1489 | plane_mask |= (1 << drm_plane_index(plane)); |
07d3bad6 | 1490 | plane->old_fb = plane->fb; |
1edf0269 RC |
1491 | } |
1492 | ||
1493 | ret = drm_atomic_commit(state); | |
1494 | if (ret != 0) | |
1495 | goto fail; | |
1496 | ||
1497 | info->var.xoffset = var->xoffset; | |
1498 | info->var.yoffset = var->yoffset; | |
1499 | ||
1edf0269 | 1500 | fail: |
07d3bad6 | 1501 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
a0fb6ad7 | 1502 | |
1edf0269 RC |
1503 | if (ret == -EDEADLK) |
1504 | goto backoff; | |
1505 | ||
0853695c | 1506 | drm_atomic_state_put(state); |
1edf0269 RC |
1507 | return ret; |
1508 | ||
1509 | backoff: | |
1510 | drm_atomic_state_clear(state); | |
1511 | drm_atomic_legacy_backoff(state); | |
1512 | ||
1513 | goto retry; | |
1514 | } | |
1515 | ||
207fd329 | 1516 | /** |
6806cdf9 | 1517 | * drm_fb_helper_pan_display - implementation for &fb_ops.fb_pan_display |
207fd329 DV |
1518 | * @var: updated screen information |
1519 | * @info: fbdev registered by the helper | |
1520 | */ | |
785b93ef DA |
1521 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1522 | struct fb_info *info) | |
1523 | { | |
1524 | struct drm_fb_helper *fb_helper = info->par; | |
1525 | struct drm_device *dev = fb_helper->dev; | |
1526 | struct drm_mode_set *modeset; | |
785b93ef DA |
1527 | int ret = 0; |
1528 | int i; | |
1529 | ||
c50bfd08 | 1530 | if (oops_in_progress) |
9aa609e1 | 1531 | return -EBUSY; |
c50bfd08 DV |
1532 | |
1533 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1534 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1535 | drm_modeset_unlock_all(dev); | |
1536 | return -EBUSY; | |
1537 | } | |
1538 | ||
a743d758 | 1539 | if (drm_drv_uses_atomic_modeset(dev)) { |
1edf0269 RC |
1540 | ret = pan_display_atomic(var, info); |
1541 | goto unlock; | |
1542 | } | |
1543 | ||
8be48d92 | 1544 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1545 | modeset = &fb_helper->crtc_info[i].mode_set; |
1546 | ||
1547 | modeset->x = var->xoffset; | |
1548 | modeset->y = var->yoffset; | |
1549 | ||
1550 | if (modeset->num_connectors) { | |
2d13b679 | 1551 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1552 | if (!ret) { |
1553 | info->var.xoffset = var->xoffset; | |
1554 | info->var.yoffset = var->yoffset; | |
1555 | } | |
1556 | } | |
1557 | } | |
1edf0269 | 1558 | unlock: |
84849903 | 1559 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1560 | return ret; |
1561 | } | |
1562 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1563 | ||
8acf658a | 1564 | /* |
207fd329 DV |
1565 | * Allocates the backing storage and sets up the fbdev info structure through |
1566 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1567 | * notifier. | |
8acf658a | 1568 | */ |
de1ace5b DV |
1569 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1570 | int preferred_bpp) | |
785b93ef | 1571 | { |
8acf658a | 1572 | int ret = 0; |
785b93ef | 1573 | int crtc_count = 0; |
4abe3520 | 1574 | int i; |
38651674 | 1575 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1576 | int gamma_size = 0; |
38651674 DA |
1577 | |
1578 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1579 | sizes.surface_depth = 24; | |
1580 | sizes.surface_bpp = 32; | |
4b4f99f5 TR |
1581 | sizes.fb_width = (u32)-1; |
1582 | sizes.fb_height = (u32)-1; | |
785b93ef | 1583 | |
4b4f99f5 | 1584 | /* if driver picks 8 or 16 by default use that for both depth/bpp */ |
96081cdf | 1585 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1586 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1587 | |
785b93ef | 1588 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
966a6a13 | 1589 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1590 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; |
1794d257 | 1591 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1592 | |
eaf99c74 | 1593 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1594 | |
1595 | if (cmdline_mode->bpp_specified) { | |
1596 | switch (cmdline_mode->bpp) { | |
1597 | case 8: | |
38651674 | 1598 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1599 | break; |
1600 | case 15: | |
38651674 DA |
1601 | sizes.surface_depth = 15; |
1602 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1603 | break; |
1604 | case 16: | |
38651674 | 1605 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1606 | break; |
1607 | case 24: | |
38651674 | 1608 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1609 | break; |
1610 | case 32: | |
38651674 DA |
1611 | sizes.surface_depth = 24; |
1612 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1613 | break; |
1614 | } | |
1615 | break; | |
1616 | } | |
1617 | } | |
1618 | ||
8be48d92 DA |
1619 | crtc_count = 0; |
1620 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1621 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1622 | struct drm_mode_set *mode_set; |
1623 | int x, y, j; | |
1624 | /* in case of tile group, are we the last tile vert or horiz? | |
1625 | * If no tile group you are always the last one both vertically | |
1626 | * and horizontally | |
1627 | */ | |
1628 | bool lastv = true, lasth = true; | |
675c8328 | 1629 | |
8be48d92 | 1630 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1631 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1632 | |
1633 | if (!desired_mode) | |
1634 | continue; | |
1635 | ||
1636 | crtc_count++; | |
1637 | ||
b0ee9e7f DA |
1638 | x = fb_helper->crtc_info[i].x; |
1639 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1640 | |
1641 | if (gamma_size == 0) | |
1642 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1643 | ||
1644 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1645 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1646 | |
1647 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1648 | struct drm_connector *connector = mode_set->connectors[j]; | |
4b4f99f5 | 1649 | |
0e3704c9 RC |
1650 | if (connector->has_tile) { |
1651 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1652 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1653 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1654 | break; | |
1655 | } | |
1656 | } | |
1657 | ||
1658 | if (lasth) | |
1659 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1660 | if (lastv) | |
1661 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1662 | } |
1663 | ||
38651674 | 1664 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
4b4f99f5 TR |
1665 | /* |
1666 | * hmm everyone went away - assume VGA cable just fell out | |
1667 | * and will come back later. | |
1668 | */ | |
eb1f8e4f | 1669 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1670 | sizes.fb_width = sizes.surface_width = 1024; |
1671 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1672 | } |
1673 | ||
5f152576 XL |
1674 | /* Handle our overallocation */ |
1675 | sizes.surface_height *= drm_fbdev_overalloc; | |
1676 | sizes.surface_height /= 100; | |
1677 | ||
38651674 | 1678 | /* push down into drivers */ |
8acf658a DV |
1679 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1680 | if (ret < 0) | |
1681 | return ret; | |
785b93ef | 1682 | |
7e53f3a4 DV |
1683 | /* |
1684 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1685 | * events, but at init time drm_setup_crtcs needs to be called before | |
1686 | * the fb is allocated (since we need to figure out the desired size of | |
1687 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1688 | * here again. | |
1689 | */ | |
96081cdf | 1690 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1691 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1692 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1693 | ||
785b93ef DA |
1694 | return 0; |
1695 | } | |
785b93ef | 1696 | |
207fd329 DV |
1697 | /** |
1698 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1699 | * @info: fbdev registered by the helper | |
1700 | * @pitch: desired pitch | |
1701 | * @depth: desired depth | |
1702 | * | |
1703 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1704 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1705 | * additional constraints need to set up their own limits. | |
1706 | * | |
1707 | * Drivers should call this (or their equivalent setup code) from their | |
6806cdf9 | 1708 | * &drm_fb_helper_funcs.fb_probe callback. |
207fd329 | 1709 | */ |
3632ef89 DA |
1710 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1711 | uint32_t depth) | |
1712 | { | |
1713 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1714 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1715 | FB_VISUAL_TRUECOLOR; | |
1716 | info->fix.mmio_start = 0; | |
1717 | info->fix.mmio_len = 0; | |
1718 | info->fix.type_aux = 0; | |
1719 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1720 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1721 | info->fix.ywrapstep = 0; | |
1722 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1723 | |
1724 | info->fix.line_length = pitch; | |
3632ef89 DA |
1725 | } |
1726 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1727 | ||
207fd329 DV |
1728 | /** |
1729 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1730 | * @info: fbdev instance to set up | |
1731 | * @fb_helper: fb helper instance to use as template | |
1732 | * @fb_width: desired fb width | |
1733 | * @fb_height: desired fb height | |
1734 | * | |
1735 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
6806cdf9 | 1736 | * and the drm framebuffer allocated in &drm_fb_helper.fb. |
207fd329 DV |
1737 | * |
1738 | * Drivers should call this (or their equivalent setup code) from their | |
6806cdf9 DV |
1739 | * &drm_fb_helper_funcs.fb_probe callback after having allocated the fbdev |
1740 | * backing storage framebuffer. | |
207fd329 | 1741 | */ |
38651674 | 1742 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1743 | uint32_t fb_width, uint32_t fb_height) |
1744 | { | |
38651674 | 1745 | struct drm_framebuffer *fb = fb_helper->fb; |
4b4f99f5 | 1746 | |
38651674 | 1747 | info->pseudo_palette = fb_helper->pseudo_palette; |
785b93ef DA |
1748 | info->var.xres_virtual = fb->width; |
1749 | info->var.yres_virtual = fb->height; | |
272725c7 | 1750 | info->var.bits_per_pixel = fb->format->cpp[0] * 8; |
57084d05 | 1751 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1752 | info->var.xoffset = 0; |
1753 | info->var.yoffset = 0; | |
1754 | info->var.activate = FB_ACTIVATE_NOW; | |
1755 | info->var.height = -1; | |
1756 | info->var.width = -1; | |
1757 | ||
b00c600e | 1758 | switch (fb->format->depth) { |
785b93ef DA |
1759 | case 8: |
1760 | info->var.red.offset = 0; | |
1761 | info->var.green.offset = 0; | |
1762 | info->var.blue.offset = 0; | |
1763 | info->var.red.length = 8; /* 8bit DAC */ | |
1764 | info->var.green.length = 8; | |
1765 | info->var.blue.length = 8; | |
1766 | info->var.transp.offset = 0; | |
1767 | info->var.transp.length = 0; | |
1768 | break; | |
1769 | case 15: | |
1770 | info->var.red.offset = 10; | |
1771 | info->var.green.offset = 5; | |
1772 | info->var.blue.offset = 0; | |
1773 | info->var.red.length = 5; | |
1774 | info->var.green.length = 5; | |
1775 | info->var.blue.length = 5; | |
1776 | info->var.transp.offset = 15; | |
1777 | info->var.transp.length = 1; | |
1778 | break; | |
1779 | case 16: | |
1780 | info->var.red.offset = 11; | |
1781 | info->var.green.offset = 5; | |
1782 | info->var.blue.offset = 0; | |
1783 | info->var.red.length = 5; | |
1784 | info->var.green.length = 6; | |
1785 | info->var.blue.length = 5; | |
1786 | info->var.transp.offset = 0; | |
1787 | break; | |
1788 | case 24: | |
1789 | info->var.red.offset = 16; | |
1790 | info->var.green.offset = 8; | |
1791 | info->var.blue.offset = 0; | |
1792 | info->var.red.length = 8; | |
1793 | info->var.green.length = 8; | |
1794 | info->var.blue.length = 8; | |
1795 | info->var.transp.offset = 0; | |
1796 | info->var.transp.length = 0; | |
1797 | break; | |
1798 | case 32: | |
1799 | info->var.red.offset = 16; | |
1800 | info->var.green.offset = 8; | |
1801 | info->var.blue.offset = 0; | |
1802 | info->var.red.length = 8; | |
1803 | info->var.green.length = 8; | |
1804 | info->var.blue.length = 8; | |
1805 | info->var.transp.offset = 24; | |
1806 | info->var.transp.length = 8; | |
1807 | break; | |
1808 | default: | |
1809 | break; | |
1810 | } | |
1811 | ||
1812 | info->var.xres = fb_width; | |
1813 | info->var.yres = fb_height; | |
1814 | } | |
1815 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1816 | |
0b4c0f3f DA |
1817 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1818 | uint32_t maxX, | |
1819 | uint32_t maxY) | |
38651674 DA |
1820 | { |
1821 | struct drm_connector *connector; | |
1822 | int count = 0; | |
0b4c0f3f | 1823 | int i; |
38651674 | 1824 | |
966a6a13 | 1825 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1826 | connector = fb_helper->connector_info[i]->connector; |
38651674 DA |
1827 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1828 | } | |
1829 | ||
1830 | return count; | |
1831 | } | |
1832 | ||
2f1046f3 | 1833 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1834 | { |
1835 | struct drm_display_mode *mode; | |
1836 | ||
0b4c0f3f | 1837 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1838 | if (mode->hdisplay > width || |
1839 | mode->vdisplay > height) | |
38651674 DA |
1840 | continue; |
1841 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1842 | return mode; | |
1843 | } | |
1844 | return NULL; | |
1845 | } | |
2f1046f3 | 1846 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1847 | |
0b4c0f3f | 1848 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1849 | { |
eaf99c74 | 1850 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1851 | } |
1852 | ||
a09759e8 | 1853 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn) |
38651674 | 1854 | { |
1794d257 | 1855 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1856 | struct drm_display_mode *mode; |
c683f427 | 1857 | bool prefer_non_interlace; |
38651674 | 1858 | |
eaf99c74 | 1859 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1860 | if (cmdline_mode->specified == false) |
f3af5c7d | 1861 | return NULL; |
38651674 DA |
1862 | |
1863 | /* attempt to find a matching mode in the list of modes | |
1864 | * we have gotten so far, if not add a CVT mode that conforms | |
1865 | */ | |
1866 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1867 | goto create_mode; | |
1868 | ||
c683f427 | 1869 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1870 | again: |
0b4c0f3f | 1871 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1872 | /* check width/height */ |
1873 | if (mode->hdisplay != cmdline_mode->xres || | |
1874 | mode->vdisplay != cmdline_mode->yres) | |
1875 | continue; | |
1876 | ||
1877 | if (cmdline_mode->refresh_specified) { | |
1878 | if (mode->vrefresh != cmdline_mode->refresh) | |
1879 | continue; | |
1880 | } | |
1881 | ||
1882 | if (cmdline_mode->interlace) { | |
1883 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1884 | continue; | |
c683f427 TI |
1885 | } else if (prefer_non_interlace) { |
1886 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1887 | continue; | |
38651674 DA |
1888 | } |
1889 | return mode; | |
1890 | } | |
1891 | ||
c683f427 TI |
1892 | if (prefer_non_interlace) { |
1893 | prefer_non_interlace = false; | |
1894 | goto again; | |
1895 | } | |
1896 | ||
38651674 | 1897 | create_mode: |
1794d257 CW |
1898 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1899 | cmdline_mode); | |
0b4c0f3f | 1900 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1901 | return mode; |
1902 | } | |
2f1046f3 | 1903 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1904 | |
1905 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1906 | { | |
1907 | bool enable; | |
1908 | ||
96081cdf | 1909 | if (strict) |
38651674 | 1910 | enable = connector->status == connector_status_connected; |
96081cdf | 1911 | else |
38651674 | 1912 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1913 | |
38651674 DA |
1914 | return enable; |
1915 | } | |
1916 | ||
0b4c0f3f DA |
1917 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1918 | bool *enabled) | |
38651674 DA |
1919 | { |
1920 | bool any_enabled = false; | |
1921 | struct drm_connector *connector; | |
1922 | int i = 0; | |
1923 | ||
966a6a13 | 1924 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1925 | connector = fb_helper->connector_info[i]->connector; |
38651674 DA |
1926 | enabled[i] = drm_connector_enabled(connector, true); |
1927 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1928 | enabled[i] ? "yes" : "no"); | |
1929 | any_enabled |= enabled[i]; | |
38651674 DA |
1930 | } |
1931 | ||
1932 | if (any_enabled) | |
1933 | return; | |
1934 | ||
966a6a13 | 1935 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1936 | connector = fb_helper->connector_info[i]->connector; |
38651674 | 1937 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1938 | } |
1939 | } | |
1940 | ||
1d42bbc8 DA |
1941 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1942 | struct drm_display_mode **modes, | |
b0ee9e7f | 1943 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1944 | bool *enabled, int width, int height) |
1945 | { | |
1946 | int count, i, j; | |
1947 | bool can_clone = false; | |
1948 | struct drm_fb_helper_connector *fb_helper_conn; | |
1949 | struct drm_display_mode *dmt_mode, *mode; | |
1950 | ||
1951 | /* only contemplate cloning in the single crtc case */ | |
1952 | if (fb_helper->crtc_count > 1) | |
1953 | return false; | |
1954 | ||
1955 | count = 0; | |
966a6a13 | 1956 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1957 | if (enabled[i]) |
1958 | count++; | |
1959 | } | |
1960 | ||
1961 | /* only contemplate cloning if more than one connector is enabled */ | |
1962 | if (count <= 1) | |
1963 | return false; | |
1964 | ||
1965 | /* check the command line or if nothing common pick 1024x768 */ | |
1966 | can_clone = true; | |
966a6a13 | 1967 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1968 | if (!enabled[i]) |
1969 | continue; | |
1970 | fb_helper_conn = fb_helper->connector_info[i]; | |
a09759e8 | 1971 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn); |
1d42bbc8 DA |
1972 | if (!modes[i]) { |
1973 | can_clone = false; | |
1974 | break; | |
1975 | } | |
1976 | for (j = 0; j < i; j++) { | |
1977 | if (!enabled[j]) | |
1978 | continue; | |
1979 | if (!drm_mode_equal(modes[j], modes[i])) | |
1980 | can_clone = false; | |
1981 | } | |
1982 | } | |
1983 | ||
1984 | if (can_clone) { | |
1985 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1986 | return true; | |
1987 | } | |
1988 | ||
1989 | /* try and find a 1024x768 mode on each connector */ | |
1990 | can_clone = true; | |
f6e252ba | 1991 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 | 1992 | |
966a6a13 | 1993 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1994 | if (!enabled[i]) |
1995 | continue; | |
1996 | ||
1997 | fb_helper_conn = fb_helper->connector_info[i]; | |
1998 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1999 | if (drm_mode_equal(mode, dmt_mode)) | |
2000 | modes[i] = mode; | |
2001 | } | |
2002 | if (!modes[i]) | |
2003 | can_clone = false; | |
2004 | } | |
2005 | ||
2006 | if (can_clone) { | |
2007 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
2008 | return true; | |
2009 | } | |
2010 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
2011 | return false; | |
2012 | } | |
2013 | ||
b0ee9e7f DA |
2014 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
2015 | struct drm_display_mode **modes, | |
2016 | struct drm_fb_offset *offsets, | |
2017 | int idx, | |
2018 | int h_idx, int v_idx) | |
2019 | { | |
2020 | struct drm_fb_helper_connector *fb_helper_conn; | |
2021 | int i; | |
2022 | int hoffset = 0, voffset = 0; | |
2023 | ||
966a6a13 | 2024 | drm_fb_helper_for_each_connector(fb_helper, i) { |
b0ee9e7f DA |
2025 | fb_helper_conn = fb_helper->connector_info[i]; |
2026 | if (!fb_helper_conn->connector->has_tile) | |
2027 | continue; | |
2028 | ||
2029 | if (!modes[i] && (h_idx || v_idx)) { | |
2030 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
2031 | fb_helper_conn->connector->base.id); | |
2032 | continue; | |
2033 | } | |
2034 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
2035 | hoffset += modes[i]->hdisplay; | |
2036 | ||
2037 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
2038 | voffset += modes[i]->vdisplay; | |
2039 | } | |
2040 | offsets[idx].x = hoffset; | |
2041 | offsets[idx].y = voffset; | |
2042 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
2043 | return 0; | |
2044 | } | |
2045 | ||
0b4c0f3f | 2046 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 2047 | struct drm_display_mode **modes, |
b0ee9e7f | 2048 | struct drm_fb_offset *offsets, |
38651674 DA |
2049 | bool *enabled, int width, int height) |
2050 | { | |
0b4c0f3f | 2051 | struct drm_fb_helper_connector *fb_helper_conn; |
c96521ee CW |
2052 | const u64 mask = BIT_ULL(fb_helper->connector_count) - 1; |
2053 | u64 conn_configured = 0; | |
b0ee9e7f | 2054 | int tile_pass = 0; |
c96521ee CW |
2055 | int i; |
2056 | ||
b0ee9e7f | 2057 | retry: |
966a6a13 | 2058 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 2059 | fb_helper_conn = fb_helper->connector_info[i]; |
38651674 | 2060 | |
c96521ee | 2061 | if (conn_configured & BIT_ULL(i)) |
b0ee9e7f DA |
2062 | continue; |
2063 | ||
2064 | if (enabled[i] == false) { | |
c96521ee | 2065 | conn_configured |= BIT_ULL(i); |
b0ee9e7f DA |
2066 | continue; |
2067 | } | |
2068 | ||
2069 | /* first pass over all the untiled connectors */ | |
2070 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 2071 | continue; |
38651674 | 2072 | |
b0ee9e7f DA |
2073 | if (tile_pass == 1) { |
2074 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
2075 | fb_helper_conn->connector->tile_v_loc != 0) | |
2076 | continue; | |
2077 | ||
2078 | } else { | |
4b4f99f5 | 2079 | if (fb_helper_conn->connector->tile_h_loc != tile_pass - 1 && |
b0ee9e7f DA |
2080 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) |
2081 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
2082 | continue; | |
2083 | ||
4b4f99f5 TR |
2084 | /* |
2085 | * find the tile offsets for this pass - need to find | |
2086 | * all tiles left and above | |
2087 | */ | |
b0ee9e7f DA |
2088 | drm_get_tile_offsets(fb_helper, modes, offsets, |
2089 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
2090 | } | |
38651674 | 2091 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 2092 | fb_helper_conn->connector->base.id); |
38651674 DA |
2093 | |
2094 | /* got for command line mode first */ | |
a09759e8 | 2095 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn); |
38651674 | 2096 | if (!modes[i]) { |
b0ee9e7f DA |
2097 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
2098 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 2099 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
2100 | } |
2101 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
2102 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
2103 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
2104 | break; |
2105 | } | |
2106 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
2107 | "none"); | |
c96521ee | 2108 | conn_configured |= BIT_ULL(i); |
b0ee9e7f DA |
2109 | } |
2110 | ||
2111 | if ((conn_configured & mask) != mask) { | |
2112 | tile_pass++; | |
2113 | goto retry; | |
38651674 DA |
2114 | } |
2115 | return true; | |
2116 | } | |
2117 | ||
8be48d92 DA |
2118 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
2119 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
2120 | struct drm_display_mode **modes, |
2121 | int n, int width, int height) | |
2122 | { | |
2123 | int c, o; | |
2124 | struct drm_connector *connector; | |
be26a66d | 2125 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 2126 | struct drm_encoder *encoder; |
38651674 | 2127 | int my_score, best_score, score; |
8be48d92 | 2128 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 2129 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 2130 | |
0b4c0f3f | 2131 | if (n == fb_helper->connector_count) |
38651674 | 2132 | return 0; |
0b4c0f3f DA |
2133 | |
2134 | fb_helper_conn = fb_helper->connector_info[n]; | |
2135 | connector = fb_helper_conn->connector; | |
38651674 DA |
2136 | |
2137 | best_crtcs[n] = NULL; | |
8be48d92 | 2138 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
2139 | if (modes[n] == NULL) |
2140 | return best_score; | |
2141 | ||
255f0e7c | 2142 | crtcs = kzalloc(fb_helper->connector_count * |
8be48d92 | 2143 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
2144 | if (!crtcs) |
2145 | return best_score; | |
2146 | ||
2147 | my_score = 1; | |
2148 | if (connector->status == connector_status_connected) | |
2149 | my_score++; | |
0b4c0f3f | 2150 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 2151 | my_score++; |
0b4c0f3f | 2152 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
2153 | my_score++; |
2154 | ||
2155 | connector_funcs = connector->helper_private; | |
c61b93fe BB |
2156 | |
2157 | /* | |
2158 | * If the DRM device implements atomic hooks and ->best_encoder() is | |
2159 | * NULL we fallback to the default drm_atomic_helper_best_encoder() | |
2160 | * helper. | |
2161 | */ | |
a743d758 | 2162 | if (drm_drv_uses_atomic_modeset(fb_helper->dev) && |
c61b93fe BB |
2163 | !connector_funcs->best_encoder) |
2164 | encoder = drm_atomic_helper_best_encoder(connector); | |
2165 | else | |
2166 | encoder = connector_funcs->best_encoder(connector); | |
2167 | ||
38651674 DA |
2168 | if (!encoder) |
2169 | goto out; | |
2170 | ||
4b4f99f5 TR |
2171 | /* |
2172 | * select a crtc for this connector and then attempt to configure | |
2173 | * remaining connectors | |
2174 | */ | |
8be48d92 DA |
2175 | for (c = 0; c < fb_helper->crtc_count; c++) { |
2176 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 2177 | |
96081cdf | 2178 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 2179 | continue; |
38651674 DA |
2180 | |
2181 | for (o = 0; o < n; o++) | |
2182 | if (best_crtcs[o] == crtc) | |
2183 | break; | |
2184 | ||
2185 | if (o < n) { | |
1d42bbc8 DA |
2186 | /* ignore cloning unless only a single crtc */ |
2187 | if (fb_helper->crtc_count > 1) | |
2188 | continue; | |
2189 | ||
2190 | if (!drm_mode_equal(modes[o], modes[n])) | |
2191 | continue; | |
38651674 DA |
2192 | } |
2193 | ||
2194 | crtcs[n] = crtc; | |
8be48d92 DA |
2195 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
2196 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
2197 | width, height); |
2198 | if (score > best_score) { | |
38651674 DA |
2199 | best_score = score; |
2200 | memcpy(best_crtcs, crtcs, | |
255f0e7c | 2201 | fb_helper->connector_count * |
8be48d92 | 2202 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 2203 | } |
38651674 DA |
2204 | } |
2205 | out: | |
2206 | kfree(crtcs); | |
2207 | return best_score; | |
2208 | } | |
2209 | ||
64e94407 CW |
2210 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, |
2211 | u32 width, u32 height) | |
38651674 | 2212 | { |
8be48d92 DA |
2213 | struct drm_device *dev = fb_helper->dev; |
2214 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 2215 | struct drm_display_mode **modes; |
b0ee9e7f | 2216 | struct drm_fb_offset *offsets; |
38651674 | 2217 | bool *enabled; |
11e17a08 | 2218 | int i; |
38651674 DA |
2219 | |
2220 | DRM_DEBUG_KMS("\n"); | |
64e94407 CW |
2221 | if (drm_fb_helper_probe_connector_modes(fb_helper, width, height) == 0) |
2222 | DRM_DEBUG_KMS("No connectors reported connected with modes\n"); | |
38651674 | 2223 | |
966a6a13 CW |
2224 | /* prevent concurrent modification of connector_count by hotplug */ |
2225 | lockdep_assert_held(&fb_helper->dev->mode_config.mutex); | |
2226 | ||
383b2e57 | 2227 | crtcs = kcalloc(fb_helper->connector_count, |
8be48d92 | 2228 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
383b2e57 | 2229 | modes = kcalloc(fb_helper->connector_count, |
38651674 | 2230 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
383b2e57 | 2231 | offsets = kcalloc(fb_helper->connector_count, |
b0ee9e7f | 2232 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
383b2e57 | 2233 | enabled = kcalloc(fb_helper->connector_count, |
38651674 | 2234 | sizeof(bool), GFP_KERNEL); |
b0ee9e7f | 2235 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
2236 | DRM_ERROR("Memory allocation failed\n"); |
2237 | goto out; | |
2238 | } | |
2239 | ||
0b4c0f3f | 2240 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2241 | |
11e17a08 JB |
2242 | if (!(fb_helper->funcs->initial_config && |
2243 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2244 | offsets, |
11e17a08 | 2245 | enabled, width, height))) { |
383b2e57 ML |
2246 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
2247 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); | |
2248 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); | |
11e17a08 | 2249 | |
b0ee9e7f DA |
2250 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2251 | enabled, width, height) && | |
2252 | !drm_target_preferred(fb_helper, modes, offsets, | |
2253 | enabled, width, height)) | |
1d42bbc8 | 2254 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2255 | |
11e17a08 JB |
2256 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2257 | width, height); | |
38651674 | 2258 | |
11e17a08 JB |
2259 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2260 | } | |
8be48d92 DA |
2261 | |
2262 | /* need to set the modesets up here for use later */ | |
2263 | /* fill out the connector<->crtc mappings into the modesets */ | |
a2889606 VS |
2264 | for (i = 0; i < fb_helper->crtc_count; i++) |
2265 | drm_fb_helper_modeset_release(fb_helper, | |
2266 | &fb_helper->crtc_info[i].mode_set); | |
38651674 | 2267 | |
966a6a13 | 2268 | drm_fb_helper_for_each_connector(fb_helper, i) { |
38651674 | 2269 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2270 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2271 | struct drm_fb_offset *offset = &offsets[i]; |
a2889606 | 2272 | struct drm_mode_set *modeset = &fb_crtc->mode_set; |
38651674 | 2273 | |
8be48d92 | 2274 | if (mode && fb_crtc) { |
a2889606 VS |
2275 | struct drm_connector *connector = |
2276 | fb_helper->connector_info[i]->connector; | |
2277 | ||
b0ee9e7f DA |
2278 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2279 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
a2889606 | 2280 | |
8be48d92 | 2281 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2282 | fb_crtc->x = offset->x; |
2283 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2284 | modeset->mode = drm_mode_duplicate(dev, |
2285 | fb_crtc->desired_mode); | |
ad093607 | 2286 | drm_connector_get(connector); |
a2889606 | 2287 | modeset->connectors[modeset->num_connectors++] = connector; |
7e53f3a4 | 2288 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2289 | modeset->x = offset->x; |
2290 | modeset->y = offset->y; | |
7e53f3a4 DV |
2291 | } |
2292 | } | |
8c5eaca0 | 2293 | out: |
38651674 DA |
2294 | kfree(crtcs); |
2295 | kfree(modes); | |
b0ee9e7f | 2296 | kfree(offsets); |
38651674 DA |
2297 | kfree(enabled); |
2298 | } | |
2299 | ||
2300 | /** | |
207fd329 | 2301 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2302 | * @fb_helper: fb_helper device struct |
2303 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2304 | * |
d0ddc033 | 2305 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2306 | * At the moment, this is a cloned configuration across all heads with |
2307 | * a new framebuffer object as the backing store. | |
2308 | * | |
207fd329 DV |
2309 | * Note that this also registers the fbdev and so allows userspace to call into |
2310 | * the driver through the fbdev interfaces. | |
2311 | * | |
6806cdf9 DV |
2312 | * This function will call down into the &drm_fb_helper_funcs.fb_probe callback |
2313 | * to let the driver allocate and initialize the fbdev info structure and the | |
2314 | * drm framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
207fd329 DV |
2315 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default |
2316 | * values for the fbdev info structure. | |
2317 | * | |
40f8cf4b DV |
2318 | * HANG DEBUGGING: |
2319 | * | |
2320 | * When you have fbcon support built-in or already loaded, this function will do | |
2321 | * a full modeset to setup the fbdev console. Due to locking misdesign in the | |
2322 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding | |
2323 | * console_lock. Until console_unlock is called no dmesg lines will be sent out | |
2324 | * to consoles, not even serial console. This means when your driver crashes, | |
2325 | * you will see absolutely nothing else but a system stuck in this function, | |
2326 | * with no further output. Any kind of printk() you place within your own driver | |
2327 | * or in the drm core modeset code will also never show up. | |
2328 | * | |
2329 | * Standard debug practice is to run the fbcon setup without taking the | |
2330 | * console_lock as a hack, to be able to see backtraces and crashes on the | |
2331 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel | |
2332 | * cmdline option. | |
2333 | * | |
2334 | * The other option is to just disable fbdev emulation since very likely the | |
af509d38 L |
2335 | * first modeset from userspace will crash in the same way, and is even easier |
2336 | * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 | |
40f8cf4b DV |
2337 | * kernel cmdline option. |
2338 | * | |
38651674 DA |
2339 | * RETURNS: |
2340 | * Zero if everything went ok, nonzero otherwise. | |
2341 | */ | |
01934c2a | 2342 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2343 | { |
8be48d92 | 2344 | struct drm_device *dev = fb_helper->dev; |
966a6a13 | 2345 | struct fb_info *info; |
966a6a13 | 2346 | int ret; |
38651674 | 2347 | |
f64c5573 DV |
2348 | if (!drm_fbdev_emulation) |
2349 | return 0; | |
2350 | ||
53f1904b | 2351 | mutex_lock(&dev->mode_config.mutex); |
64e94407 CW |
2352 | drm_setup_crtcs(fb_helper, |
2353 | dev->mode_config.max_width, | |
2354 | dev->mode_config.max_height); | |
966a6a13 CW |
2355 | ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
2356 | mutex_unlock(&dev->mode_config.mutex); | |
2357 | if (ret) | |
2358 | return ret; | |
38651674 | 2359 | |
966a6a13 CW |
2360 | info = fb_helper->fbdev; |
2361 | info->var.pixclock = 0; | |
2362 | ret = register_framebuffer(info); | |
2363 | if (ret < 0) | |
2364 | return ret; | |
2365 | ||
2366 | dev_info(dev->dev, "fb%d: %s frame buffer device\n", | |
2367 | info->node, info->fix.id); | |
2368 | ||
a53ca635 | 2369 | mutex_lock(&kernel_fb_helper_lock); |
966a6a13 CW |
2370 | if (list_empty(&kernel_fb_helper_list)) |
2371 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
2372 | ||
2373 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
a53ca635 | 2374 | mutex_unlock(&kernel_fb_helper_lock); |
966a6a13 CW |
2375 | |
2376 | return 0; | |
38651674 | 2377 | } |
8be48d92 | 2378 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2379 | |
7394371d CW |
2380 | /** |
2381 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2382 | * probing all the outputs attached to the fb |
7394371d CW |
2383 | * @fb_helper: the drm_fb_helper |
2384 | * | |
7394371d | 2385 | * Scan the connectors attached to the fb_helper and try to put together a |
62cacc79 | 2386 | * setup after notification of a change in output configuration. |
7394371d | 2387 | * |
207fd329 DV |
2388 | * Called at runtime, takes the mode config locks to be able to check/change the |
2389 | * modeset configuration. Must be run from process context (which usually means | |
2390 | * either the output polling work or a work item launched from the driver's | |
2391 | * hotplug interrupt). | |
2392 | * | |
50c3dc97 | 2393 | * Note that drivers may call this even before calling |
af509d38 | 2394 | * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows |
50c3dc97 DV |
2395 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
2396 | * not miss any hotplug events. | |
207fd329 | 2397 | * |
7394371d CW |
2398 | * RETURNS: |
2399 | * 0 on success and a non-zero error code otherwise. | |
2400 | */ | |
2401 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2402 | { |
7394371d | 2403 | struct drm_device *dev = fb_helper->dev; |
5c4426a7 | 2404 | |
f64c5573 DV |
2405 | if (!drm_fbdev_emulation) |
2406 | return 0; | |
2407 | ||
64e94407 | 2408 | mutex_lock(&dev->mode_config.mutex); |
50c3dc97 | 2409 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2410 | fb_helper->delayed_hotplug = true; |
64e94407 | 2411 | mutex_unlock(&dev->mode_config.mutex); |
7394371d | 2412 | return 0; |
4abe3520 | 2413 | } |
eb1f8e4f | 2414 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2415 | |
64e94407 | 2416 | drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height); |
5c4426a7 | 2417 | |
64e94407 | 2418 | mutex_unlock(&dev->mode_config.mutex); |
89ced125 | 2419 | |
2180c3c7 DV |
2420 | drm_fb_helper_set_par(fb_helper->fbdev); |
2421 | ||
2422 | return 0; | |
5c4426a7 | 2423 | } |
eb1f8e4f | 2424 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2425 | |
6a108a14 | 2426 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2427 | * but the module doesn't depend on any fb console symbols. At least |
2428 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2429 | */ | |
70412cfa | 2430 | int __init drm_fb_helper_modinit(void) |
3ce05168 | 2431 | { |
70412cfa | 2432 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2433 | const char *name = "fbcon"; |
2434 | struct module *fbcon; | |
2435 | ||
2436 | mutex_lock(&module_mutex); | |
2437 | fbcon = find_module(name); | |
2438 | mutex_unlock(&module_mutex); | |
2439 | ||
2440 | if (!fbcon) | |
2441 | request_module_nowait(name); | |
70412cfa | 2442 | #endif |
3ce05168 DF |
2443 | return 0; |
2444 | } | |
70412cfa | 2445 | EXPORT_SYMBOL(drm_fb_helper_modinit); |