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Commit | Line | Data |
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785b93ef DA |
1 | /* |
2 | * Copyright (c) 2006-2009 Red Hat Inc. | |
3 | * Copyright (c) 2006-2008 Intel Corporation | |
4 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
5 | * | |
6 | * DRM framebuffer helper functions | |
7 | * | |
8 | * Permission to use, copy, modify, distribute, and sell this software and its | |
9 | * documentation for any purpose is hereby granted without fee, provided that | |
10 | * the above copyright notice appear in all copies and that both that copyright | |
11 | * notice and this permission notice appear in supporting documentation, and | |
12 | * that the name of the copyright holders not be used in advertising or | |
13 | * publicity pertaining to distribution of the software without specific, | |
14 | * written prior permission. The copyright holders make no representations | |
15 | * about the suitability of this software for any purpose. It is provided "as | |
16 | * is" without express or implied warranty. | |
17 | * | |
18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
24 | * OF THIS SOFTWARE. | |
25 | * | |
26 | * Authors: | |
27 | * Dave Airlie <airlied@linux.ie> | |
28 | * Jesse Barnes <jesse.barnes@intel.com> | |
29 | */ | |
d56b1b9d SK |
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | ||
cfe63423 | 32 | #include <linux/console.h> |
3b40a443 | 33 | #include <linux/kernel.h> |
785b93ef | 34 | #include <linux/sysrq.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
e0cd3608 | 36 | #include <linux/module.h> |
760285e7 DH |
37 | #include <drm/drmP.h> |
38 | #include <drm/drm_crtc.h> | |
39 | #include <drm/drm_fb_helper.h> | |
40 | #include <drm/drm_crtc_helper.h> | |
bbb1e524 RC |
41 | #include <drm/drm_atomic.h> |
42 | #include <drm/drm_atomic_helper.h> | |
785b93ef | 43 | |
699fbeea VS |
44 | #include "drm_crtc_helper_internal.h" |
45 | ||
f64c5573 DV |
46 | static bool drm_fbdev_emulation = true; |
47 | module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); | |
48 | MODULE_PARM_DESC(fbdev_emulation, | |
49 | "Enable legacy fbdev emulation [default=true]"); | |
50 | ||
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 | ||
7ea77283 | 259 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); |
99231028 JW |
260 | } |
261 | ||
207fd329 | 262 | /** |
6806cdf9 | 263 | * drm_fb_helper_debug_enter - implementation for &fb_ops.fb_debug_enter |
207fd329 DV |
264 | * @info: fbdev registered by the helper |
265 | */ | |
1a7aba7f JB |
266 | int drm_fb_helper_debug_enter(struct fb_info *info) |
267 | { | |
268 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 269 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
270 | int i; |
271 | ||
1a7aba7f JB |
272 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
273 | for (i = 0; i < helper->crtc_count; i++) { | |
274 | struct drm_mode_set *mode_set = | |
275 | &helper->crtc_info[i].mode_set; | |
276 | ||
277 | if (!mode_set->crtc->enabled) | |
278 | continue; | |
279 | ||
280 | funcs = mode_set->crtc->helper_private; | |
1b99b724 SC |
281 | if (funcs->mode_set_base_atomic == NULL) |
282 | continue; | |
283 | ||
9c79e0b1 DV |
284 | if (drm_drv_uses_atomic_modeset(mode_set->crtc->dev)) |
285 | continue; | |
286 | ||
99231028 | 287 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
288 | funcs->mode_set_base_atomic(mode_set->crtc, |
289 | mode_set->fb, | |
290 | mode_set->x, | |
413d45d3 | 291 | mode_set->y, |
21c74a8e | 292 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
293 | } |
294 | } | |
295 | ||
296 | return 0; | |
297 | } | |
298 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
299 | ||
300 | /* Find the real fb for a given fb helper CRTC */ | |
301 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
302 | { | |
303 | struct drm_device *dev = crtc->dev; | |
304 | struct drm_crtc *c; | |
305 | ||
6295d607 | 306 | drm_for_each_crtc(c, dev) { |
1a7aba7f | 307 | if (crtc->base.id == c->base.id) |
f4510a27 | 308 | return c->primary->fb; |
1a7aba7f JB |
309 | } |
310 | ||
311 | return NULL; | |
312 | } | |
313 | ||
207fd329 | 314 | /** |
6806cdf9 | 315 | * drm_fb_helper_debug_leave - implementation for &fb_ops.fb_debug_leave |
207fd329 DV |
316 | * @info: fbdev registered by the helper |
317 | */ | |
1a7aba7f JB |
318 | int drm_fb_helper_debug_leave(struct fb_info *info) |
319 | { | |
320 | struct drm_fb_helper *helper = info->par; | |
321 | struct drm_crtc *crtc; | |
be26a66d | 322 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
323 | struct drm_framebuffer *fb; |
324 | int i; | |
325 | ||
326 | for (i = 0; i < helper->crtc_count; i++) { | |
327 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
4b4f99f5 | 328 | |
1a7aba7f JB |
329 | crtc = mode_set->crtc; |
330 | funcs = crtc->helper_private; | |
331 | fb = drm_mode_config_fb(crtc); | |
332 | ||
333 | if (!crtc->enabled) | |
334 | continue; | |
335 | ||
336 | if (!fb) { | |
337 | DRM_ERROR("no fb to restore??\n"); | |
338 | continue; | |
339 | } | |
340 | ||
1b99b724 SC |
341 | if (funcs->mode_set_base_atomic == NULL) |
342 | continue; | |
343 | ||
9c79e0b1 DV |
344 | if (drm_drv_uses_atomic_modeset(crtc->dev)) |
345 | continue; | |
346 | ||
99231028 | 347 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 348 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 349 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
350 | } |
351 | ||
352 | return 0; | |
353 | } | |
354 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
355 | ||
bbb1e524 RC |
356 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
357 | { | |
358 | struct drm_device *dev = fb_helper->dev; | |
359 | struct drm_plane *plane; | |
360 | struct drm_atomic_state *state; | |
361 | int i, ret; | |
4b4f99f5 | 362 | unsigned int plane_mask; |
bbb1e524 RC |
363 | |
364 | state = drm_atomic_state_alloc(dev); | |
365 | if (!state) | |
366 | return -ENOMEM; | |
367 | ||
368 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
369 | retry: | |
f72c6b33 | 370 | plane_mask = 0; |
bbb1e524 RC |
371 | drm_for_each_plane(plane, dev) { |
372 | struct drm_plane_state *plane_state; | |
373 | ||
374 | plane_state = drm_atomic_get_plane_state(state, plane); | |
375 | if (IS_ERR(plane_state)) { | |
376 | ret = PTR_ERR(plane_state); | |
377 | goto fail; | |
378 | } | |
379 | ||
31ad61e4 | 380 | plane_state->rotation = DRM_ROTATE_0; |
bbb1e524 | 381 | |
f72c6b33 ML |
382 | plane->old_fb = plane->fb; |
383 | plane_mask |= 1 << drm_plane_index(plane); | |
384 | ||
bbb1e524 RC |
385 | /* disable non-primary: */ |
386 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
387 | continue; | |
388 | ||
389 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
390 | if (ret != 0) | |
391 | goto fail; | |
392 | } | |
393 | ||
4b4f99f5 | 394 | for (i = 0; i < fb_helper->crtc_count; i++) { |
bbb1e524 RC |
395 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; |
396 | ||
397 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
398 | if (ret != 0) | |
399 | goto fail; | |
400 | } | |
401 | ||
402 | ret = drm_atomic_commit(state); | |
bbb1e524 RC |
403 | |
404 | fail: | |
f72c6b33 | 405 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
94284037 | 406 | |
bbb1e524 RC |
407 | if (ret == -EDEADLK) |
408 | goto backoff; | |
409 | ||
0853695c | 410 | drm_atomic_state_put(state); |
bbb1e524 RC |
411 | return ret; |
412 | ||
413 | backoff: | |
414 | drm_atomic_state_clear(state); | |
415 | drm_atomic_legacy_backoff(state); | |
416 | ||
417 | goto retry; | |
418 | } | |
419 | ||
b7bdf0a8 | 420 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 421 | { |
3858bc5d VS |
422 | struct drm_device *dev = fb_helper->dev; |
423 | struct drm_plane *plane; | |
3858bc5d VS |
424 | int i; |
425 | ||
426 | drm_warn_on_modeset_not_all_locked(dev); | |
6aed8ec3 | 427 | |
a743d758 | 428 | if (drm_drv_uses_atomic_modeset(dev)) |
bbb1e524 RC |
429 | return restore_fbdev_mode_atomic(fb_helper); |
430 | ||
6295d607 | 431 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
432 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
433 | drm_plane_force_disable(plane); | |
6aed8ec3 | 434 | |
6686df8c | 435 | if (plane->rotation_property) |
d138dd3c VS |
436 | drm_mode_plane_set_obj_prop(plane, |
437 | plane->rotation_property, | |
438 | DRM_ROTATE_0); | |
9783de20 SJ |
439 | } |
440 | ||
e8e7a2b8 DA |
441 | for (i = 0; i < fb_helper->crtc_count; i++) { |
442 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d VS |
443 | struct drm_crtc *crtc = mode_set->crtc; |
444 | int ret; | |
445 | ||
03f9abb2 AD |
446 | if (crtc->funcs->cursor_set2) { |
447 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
448 | if (ret) | |
48f87dd1 | 449 | return ret; |
03f9abb2 | 450 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
451 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
452 | if (ret) | |
b7bdf0a8 | 453 | return ret; |
3858bc5d VS |
454 | } |
455 | ||
2d13b679 | 456 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 457 | if (ret) |
b7bdf0a8 | 458 | return ret; |
e8e7a2b8 | 459 | } |
b7bdf0a8 DV |
460 | |
461 | return 0; | |
e8e7a2b8 | 462 | } |
5ea1f752 RC |
463 | |
464 | /** | |
465 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
466 | * @fb_helper: fbcon to restore | |
467 | * | |
6806cdf9 | 468 | * This should be called from driver's drm &drm_driver.lastclose callback |
5ea1f752 RC |
469 | * when implementing an fbcon on top of kms using this helper. This ensures that |
470 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
471 | * |
472 | * RETURNS: | |
473 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 474 | */ |
b7bdf0a8 | 475 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 RC |
476 | { |
477 | struct drm_device *dev = fb_helper->dev; | |
b7bdf0a8 DV |
478 | bool do_delayed; |
479 | int ret; | |
e2809c7d | 480 | |
f64c5573 DV |
481 | if (!drm_fbdev_emulation) |
482 | return -ENODEV; | |
483 | ||
5ea1f752 RC |
484 | drm_modeset_lock_all(dev); |
485 | ret = restore_fbdev_mode(fb_helper); | |
e2809c7d DA |
486 | |
487 | do_delayed = fb_helper->delayed_hotplug; | |
488 | if (do_delayed) | |
489 | fb_helper->delayed_hotplug = false; | |
5ea1f752 | 490 | drm_modeset_unlock_all(dev); |
e2809c7d DA |
491 | |
492 | if (do_delayed) | |
493 | drm_fb_helper_hotplug_event(fb_helper); | |
5ea1f752 RC |
494 | return ret; |
495 | } | |
496 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 497 | |
2c4124fd GU |
498 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
499 | { | |
500 | struct drm_device *dev = fb_helper->dev; | |
501 | struct drm_crtc *crtc; | |
502 | int bound = 0, crtcs_bound = 0; | |
503 | ||
4b4f99f5 TR |
504 | /* |
505 | * Sometimes user space wants everything disabled, so don't steal the | |
506 | * display if there's a master. | |
507 | */ | |
f17b3ea3 | 508 | if (READ_ONCE(dev->master)) |
2c4124fd GU |
509 | return false; |
510 | ||
511 | drm_for_each_crtc(crtc, dev) { | |
512 | if (crtc->primary->fb) | |
513 | crtcs_bound++; | |
514 | if (crtc->primary->fb == fb_helper->fb) | |
515 | bound++; | |
516 | } | |
517 | ||
518 | if (bound < crtcs_bound) | |
519 | return false; | |
520 | ||
521 | return true; | |
522 | } | |
523 | ||
524 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
525 | /* |
526 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
527 | * and panic handling. | |
528 | */ | |
78b9c353 | 529 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 530 | { |
785b93ef DA |
531 | bool ret, error = false; |
532 | struct drm_fb_helper *helper; | |
533 | ||
534 | if (list_empty(&kernel_fb_helper_list)) | |
535 | return false; | |
536 | ||
537 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
538 | struct drm_device *dev = helper->dev; |
539 | ||
540 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
541 | continue; | |
542 | ||
dd908c86 | 543 | drm_modeset_lock_all(dev); |
3d9e35a9 | 544 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
545 | if (ret) |
546 | error = true; | |
cb597bb3 | 547 | drm_modeset_unlock_all(dev); |
785b93ef DA |
548 | } |
549 | return error; | |
550 | } | |
551 | ||
785b93ef DA |
552 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
553 | { | |
d21bf469 | 554 | bool ret; |
4b4f99f5 | 555 | |
d21bf469 DV |
556 | ret = drm_fb_helper_force_kernel_mode(); |
557 | if (ret == true) | |
558 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
559 | } |
560 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
561 | ||
1495cc9d | 562 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
563 | { |
564 | schedule_work(&drm_fb_helper_restore_work); | |
565 | } | |
566 | ||
567 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
568 | .handler = drm_fb_helper_sysrq, | |
569 | .help_msg = "force-fb(V)", | |
570 | .action_msg = "Restore framebuffer console", | |
571 | }; | |
b8c40d62 RD |
572 | #else |
573 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 574 | #endif |
785b93ef | 575 | |
3a8148c5 | 576 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
577 | { |
578 | struct drm_fb_helper *fb_helper = info->par; | |
579 | struct drm_device *dev = fb_helper->dev; | |
580 | struct drm_crtc *crtc; | |
023eb571 | 581 | struct drm_connector *connector; |
023eb571 | 582 | int i, j; |
785b93ef DA |
583 | |
584 | /* | |
3a8148c5 | 585 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 586 | */ |
84849903 | 587 | drm_modeset_lock_all(dev); |
20c60c35 DV |
588 | if (!drm_fb_helper_is_bound(fb_helper)) { |
589 | drm_modeset_unlock_all(dev); | |
590 | return; | |
591 | } | |
592 | ||
e87b2c42 | 593 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 594 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 595 | |
8be48d92 DA |
596 | if (!crtc->enabled) |
597 | continue; | |
598 | ||
3a8148c5 | 599 | /* Walk the connectors & encoders on this fb turning them on/off */ |
966a6a13 | 600 | drm_fb_helper_for_each_connector(fb_helper, j) { |
023eb571 | 601 | connector = fb_helper->connector_info[j]->connector; |
e04190e0 | 602 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 603 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 604 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 605 | } |
785b93ef | 606 | } |
84849903 | 607 | drm_modeset_unlock_all(dev); |
785b93ef DA |
608 | } |
609 | ||
207fd329 | 610 | /** |
6806cdf9 | 611 | * drm_fb_helper_blank - implementation for &fb_ops.fb_blank |
207fd329 DV |
612 | * @blank: desired blanking state |
613 | * @info: fbdev registered by the helper | |
614 | */ | |
785b93ef DA |
615 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
616 | { | |
c50bfd08 DV |
617 | if (oops_in_progress) |
618 | return -EBUSY; | |
619 | ||
785b93ef | 620 | switch (blank) { |
731b5a15 | 621 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 622 | case FB_BLANK_UNBLANK: |
3a8148c5 | 623 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 624 | break; |
731b5a15 | 625 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 626 | case FB_BLANK_NORMAL: |
3a8148c5 | 627 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 628 | break; |
731b5a15 | 629 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 630 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 631 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 632 | break; |
731b5a15 | 633 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 634 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 635 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 636 | break; |
731b5a15 | 637 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 638 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 639 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
640 | break; |
641 | } | |
642 | return 0; | |
643 | } | |
644 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
645 | ||
a2889606 VS |
646 | static void drm_fb_helper_modeset_release(struct drm_fb_helper *helper, |
647 | struct drm_mode_set *modeset) | |
648 | { | |
649 | int i; | |
650 | ||
651 | for (i = 0; i < modeset->num_connectors; i++) { | |
ad093607 | 652 | drm_connector_put(modeset->connectors[i]); |
a2889606 VS |
653 | modeset->connectors[i] = NULL; |
654 | } | |
655 | modeset->num_connectors = 0; | |
656 | ||
657 | drm_mode_destroy(helper->dev, modeset->mode); | |
658 | modeset->mode = NULL; | |
659 | ||
660 | /* FIXME should hold a ref? */ | |
661 | modeset->fb = NULL; | |
662 | } | |
663 | ||
785b93ef DA |
664 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) |
665 | { | |
666 | int i; | |
667 | ||
6e86d58b | 668 | for (i = 0; i < helper->connector_count; i++) { |
ad093607 | 669 | drm_connector_put(helper->connector_info[i]->connector); |
0b4c0f3f | 670 | kfree(helper->connector_info[i]); |
6e86d58b | 671 | } |
0b4c0f3f | 672 | kfree(helper->connector_info); |
a2889606 | 673 | |
a1b7736d | 674 | for (i = 0; i < helper->crtc_count; i++) { |
a2889606 VS |
675 | struct drm_mode_set *modeset = &helper->crtc_info[i].mode_set; |
676 | ||
677 | drm_fb_helper_modeset_release(helper, modeset); | |
678 | kfree(modeset->connectors); | |
a1b7736d | 679 | } |
785b93ef DA |
680 | kfree(helper->crtc_info); |
681 | } | |
682 | ||
cfe63423 NT |
683 | static void drm_fb_helper_resume_worker(struct work_struct *work) |
684 | { | |
685 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
686 | resume_work); | |
687 | ||
688 | console_lock(); | |
689 | fb_set_suspend(helper->fbdev, 0); | |
690 | console_unlock(); | |
691 | } | |
692 | ||
eaa434de NT |
693 | static void drm_fb_helper_dirty_work(struct work_struct *work) |
694 | { | |
695 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
696 | dirty_work); | |
697 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
698 | struct drm_clip_rect clip_copy; | |
699 | unsigned long flags; | |
700 | ||
701 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
702 | clip_copy = *clip; | |
703 | clip->x1 = clip->y1 = ~0; | |
704 | clip->x2 = clip->y2 = 0; | |
705 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
706 | ||
87d3b658 TI |
707 | /* call dirty callback only when it has been really touched */ |
708 | if (clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2) | |
709 | helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); | |
eaa434de NT |
710 | } |
711 | ||
10a23102 TR |
712 | /** |
713 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
714 | * @dev: DRM device | |
715 | * @helper: driver-allocated fbdev helper structure to set up | |
716 | * @funcs: pointer to structure of functions associate with this helper | |
717 | * | |
718 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
719 | * useful to implement race-free initialization of the polling helpers. | |
720 | */ | |
721 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
722 | const struct drm_fb_helper_funcs *funcs) | |
723 | { | |
724 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
eaa434de | 725 | spin_lock_init(&helper->dirty_lock); |
cfe63423 | 726 | INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker); |
eaa434de NT |
727 | INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work); |
728 | helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0; | |
10a23102 TR |
729 | helper->funcs = funcs; |
730 | helper->dev = dev; | |
731 | } | |
732 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
733 | ||
207fd329 | 734 | /** |
ed84e254 | 735 | * drm_fb_helper_init - initialize a &struct drm_fb_helper |
207fd329 DV |
736 | * @dev: drm device |
737 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
207fd329 DV |
738 | * @max_conn_count: max connector count |
739 | * | |
740 | * This allocates the structures for the fbdev helper with the given limits. | |
741 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
742 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
743 | * to allow driver writes more control over the exact init sequence. | |
744 | * | |
10a23102 | 745 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
746 | * |
747 | * RETURNS: | |
748 | * Zero if everything went ok, nonzero otherwise. | |
749 | */ | |
4abe3520 DA |
750 | int drm_fb_helper_init(struct drm_device *dev, |
751 | struct drm_fb_helper *fb_helper, | |
e4563f6b | 752 | int max_conn_count) |
785b93ef | 753 | { |
785b93ef | 754 | struct drm_crtc *crtc; |
e4563f6b | 755 | struct drm_mode_config *config = &dev->mode_config; |
785b93ef DA |
756 | int i; |
757 | ||
f64c5573 DV |
758 | if (!drm_fbdev_emulation) |
759 | return 0; | |
760 | ||
04cfe97e XL |
761 | if (!max_conn_count) |
762 | return -EINVAL; | |
763 | ||
e4563f6b | 764 | fb_helper->crtc_info = kcalloc(config->num_crtc, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
4abe3520 | 765 | if (!fb_helper->crtc_info) |
785b93ef DA |
766 | return -ENOMEM; |
767 | ||
e4563f6b | 768 | fb_helper->crtc_count = config->num_crtc; |
4abe3520 DA |
769 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); |
770 | if (!fb_helper->connector_info) { | |
771 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
772 | return -ENOMEM; |
773 | } | |
65c2a89c | 774 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 775 | fb_helper->connector_count = 0; |
785b93ef | 776 | |
e4563f6b | 777 | for (i = 0; i < fb_helper->crtc_count; i++) { |
4abe3520 | 778 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
779 | kcalloc(max_conn_count, |
780 | sizeof(struct drm_connector *), | |
781 | GFP_KERNEL); | |
782 | ||
4a1b0714 | 783 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 784 | goto out_free; |
4abe3520 | 785 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
786 | } |
787 | ||
788 | i = 0; | |
6295d607 | 789 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 790 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
791 | i++; |
792 | } | |
e9ad3181 | 793 | |
785b93ef DA |
794 | return 0; |
795 | out_free: | |
4abe3520 | 796 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
797 | return -ENOMEM; |
798 | } | |
4abe3520 DA |
799 | EXPORT_SYMBOL(drm_fb_helper_init); |
800 | ||
b8017d6c AT |
801 | /** |
802 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
803 | * @fb_helper: driver-allocated fbdev helper | |
804 | * | |
805 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
da7bdda2 DV |
806 | * by the driver within the fb_probe fb_helper callback function. Drivers do not |
807 | * need to release the allocated fb_info structure themselves, this is | |
808 | * automatically done when calling drm_fb_helper_fini(). | |
b8017d6c AT |
809 | * |
810 | * RETURNS: | |
811 | * fb_info pointer if things went okay, pointer containing error code | |
812 | * otherwise | |
813 | */ | |
814 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
815 | { | |
816 | struct device *dev = fb_helper->dev->dev; | |
817 | struct fb_info *info; | |
818 | int ret; | |
819 | ||
820 | info = framebuffer_alloc(0, dev); | |
821 | if (!info) | |
822 | return ERR_PTR(-ENOMEM); | |
823 | ||
824 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
825 | if (ret) | |
826 | goto err_release; | |
827 | ||
828 | info->apertures = alloc_apertures(1); | |
829 | if (!info->apertures) { | |
830 | ret = -ENOMEM; | |
831 | goto err_free_cmap; | |
832 | } | |
833 | ||
834 | fb_helper->fbdev = info; | |
835 | ||
836 | return info; | |
837 | ||
838 | err_free_cmap: | |
839 | fb_dealloc_cmap(&info->cmap); | |
840 | err_release: | |
841 | framebuffer_release(info); | |
842 | return ERR_PTR(ret); | |
843 | } | |
844 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
845 | ||
846 | /** | |
847 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
848 | * @fb_helper: driver-allocated fbdev helper | |
849 | * | |
850 | * A wrapper around unregister_framebuffer, to release the fb_info | |
ed84e254 DV |
851 | * framebuffer device. This must be called before releasing all resources for |
852 | * @fb_helper by calling drm_fb_helper_fini(). | |
b8017d6c AT |
853 | */ |
854 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
855 | { | |
856 | if (fb_helper && fb_helper->fbdev) | |
857 | unregister_framebuffer(fb_helper->fbdev); | |
858 | } | |
859 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
860 | ||
ed84e254 DV |
861 | /** |
862 | * drm_fb_helper_fini - finialize a &struct drm_fb_helper | |
863 | * @fb_helper: driver-allocated fbdev helper | |
864 | * | |
865 | * This cleans up all remaining resources associated with @fb_helper. Must be | |
866 | * called after drm_fb_helper_unlink_fbi() was called. | |
867 | */ | |
4abe3520 DA |
868 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
869 | { | |
da7bdda2 DV |
870 | struct fb_info *info; |
871 | ||
872 | if (!drm_fbdev_emulation || !fb_helper) | |
f64c5573 DV |
873 | return; |
874 | ||
da7bdda2 DV |
875 | info = fb_helper->fbdev; |
876 | if (info) { | |
877 | if (info->cmap.len) | |
878 | fb_dealloc_cmap(&info->cmap); | |
879 | framebuffer_release(info); | |
880 | } | |
881 | fb_helper->fbdev = NULL; | |
882 | ||
24f76b2c | 883 | cancel_work_sync(&fb_helper->resume_work); |
f21b9a92 CW |
884 | cancel_work_sync(&fb_helper->dirty_work); |
885 | ||
a53ca635 | 886 | mutex_lock(&kernel_fb_helper_lock); |
4abe3520 DA |
887 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
888 | list_del(&fb_helper->kernel_fb_list); | |
4b4f99f5 | 889 | if (list_empty(&kernel_fb_helper_list)) |
4abe3520 | 890 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
4abe3520 | 891 | } |
a53ca635 | 892 | mutex_unlock(&kernel_fb_helper_lock); |
4abe3520 DA |
893 | |
894 | drm_fb_helper_crtc_free(fb_helper); | |
895 | ||
4abe3520 DA |
896 | } |
897 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 898 | |
47074ab7 AT |
899 | /** |
900 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
901 | * @fb_helper: driver-allocated fbdev helper | |
902 | * | |
903 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
904 | */ | |
905 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
906 | { | |
907 | if (fb_helper && fb_helper->fbdev) | |
908 | unlink_framebuffer(fb_helper->fbdev); | |
909 | } | |
910 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
911 | ||
eaa434de NT |
912 | static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y, |
913 | u32 width, u32 height) | |
914 | { | |
915 | struct drm_fb_helper *helper = info->par; | |
916 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
917 | unsigned long flags; | |
918 | ||
919 | if (!helper->fb->funcs->dirty) | |
920 | return; | |
921 | ||
922 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
923 | clip->x1 = min_t(u32, clip->x1, x); | |
924 | clip->y1 = min_t(u32, clip->y1, y); | |
925 | clip->x2 = max_t(u32, clip->x2, x + width); | |
926 | clip->y2 = max_t(u32, clip->y2, y + height); | |
927 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
928 | ||
929 | schedule_work(&helper->dirty_work); | |
930 | } | |
931 | ||
932 | /** | |
933 | * drm_fb_helper_deferred_io() - fbdev deferred_io callback function | |
934 | * @info: fb_info struct pointer | |
935 | * @pagelist: list of dirty mmap framebuffer pages | |
936 | * | |
6806cdf9 | 937 | * This function is used as the &fb_deferred_io.deferred_io |
eaa434de NT |
938 | * callback function for flushing the fbdev mmap writes. |
939 | */ | |
940 | void drm_fb_helper_deferred_io(struct fb_info *info, | |
941 | struct list_head *pagelist) | |
942 | { | |
943 | unsigned long start, end, min, max; | |
944 | struct page *page; | |
945 | u32 y1, y2; | |
946 | ||
947 | min = ULONG_MAX; | |
948 | max = 0; | |
949 | list_for_each_entry(page, pagelist, lru) { | |
950 | start = page->index << PAGE_SHIFT; | |
951 | end = start + PAGE_SIZE - 1; | |
952 | min = min(min, start); | |
953 | max = max(max, end); | |
954 | } | |
955 | ||
956 | if (min < max) { | |
957 | y1 = min / info->fix.line_length; | |
958 | y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length), | |
959 | info->var.yres); | |
960 | drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1); | |
961 | } | |
962 | } | |
963 | EXPORT_SYMBOL(drm_fb_helper_deferred_io); | |
964 | ||
cbb1a82e AT |
965 | /** |
966 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
967 | * @info: fb_info struct pointer | |
968 | * @buf: userspace buffer to read from framebuffer memory | |
969 | * @count: number of bytes to read from framebuffer memory | |
970 | * @ppos: read offset within framebuffer memory | |
971 | * | |
972 | * A wrapper around fb_sys_read implemented by fbdev core | |
973 | */ | |
974 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
975 | size_t count, loff_t *ppos) | |
976 | { | |
977 | return fb_sys_read(info, buf, count, ppos); | |
978 | } | |
979 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
980 | ||
981 | /** | |
982 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
983 | * @info: fb_info struct pointer | |
984 | * @buf: userspace buffer to write to framebuffer memory | |
985 | * @count: number of bytes to write to framebuffer memory | |
986 | * @ppos: write offset within framebuffer memory | |
987 | * | |
988 | * A wrapper around fb_sys_write implemented by fbdev core | |
989 | */ | |
990 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
991 | size_t count, loff_t *ppos) | |
992 | { | |
eaa434de NT |
993 | ssize_t ret; |
994 | ||
995 | ret = fb_sys_write(info, buf, count, ppos); | |
996 | if (ret > 0) | |
997 | drm_fb_helper_dirty(info, 0, 0, info->var.xres, | |
998 | info->var.yres); | |
999 | ||
1000 | return ret; | |
cbb1a82e AT |
1001 | } |
1002 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
1003 | ||
742547b7 AT |
1004 | /** |
1005 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
1006 | * @info: fbdev registered by the helper | |
1007 | * @rect: info about rectangle to fill | |
1008 | * | |
1009 | * A wrapper around sys_fillrect implemented by fbdev core | |
1010 | */ | |
1011 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
1012 | const struct fb_fillrect *rect) | |
1013 | { | |
1014 | sys_fillrect(info, rect); | |
eaa434de NT |
1015 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
1016 | rect->width, rect->height); | |
742547b7 AT |
1017 | } |
1018 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
1019 | ||
1020 | /** | |
1021 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
1022 | * @info: fbdev registered by the helper | |
1023 | * @area: info about area to copy | |
1024 | * | |
1025 | * A wrapper around sys_copyarea implemented by fbdev core | |
1026 | */ | |
1027 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
1028 | const struct fb_copyarea *area) | |
1029 | { | |
1030 | sys_copyarea(info, area); | |
eaa434de NT |
1031 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1032 | area->width, area->height); | |
742547b7 AT |
1033 | } |
1034 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
1035 | ||
1036 | /** | |
1037 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
1038 | * @info: fbdev registered by the helper | |
1039 | * @image: info about image to blit | |
1040 | * | |
1041 | * A wrapper around sys_imageblit implemented by fbdev core | |
1042 | */ | |
1043 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
1044 | const struct fb_image *image) | |
1045 | { | |
1046 | sys_imageblit(info, image); | |
eaa434de NT |
1047 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1048 | image->width, image->height); | |
742547b7 AT |
1049 | } |
1050 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
1051 | ||
1052 | /** | |
1053 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
1054 | * @info: fbdev registered by the helper | |
1055 | * @rect: info about rectangle to fill | |
1056 | * | |
1057 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1058 | */ | |
1059 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
1060 | const struct fb_fillrect *rect) | |
1061 | { | |
1062 | cfb_fillrect(info, rect); | |
eaa434de NT |
1063 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
1064 | rect->width, rect->height); | |
742547b7 AT |
1065 | } |
1066 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
1067 | ||
1068 | /** | |
1069 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
1070 | * @info: fbdev registered by the helper | |
1071 | * @area: info about area to copy | |
1072 | * | |
1073 | * A wrapper around cfb_copyarea implemented by fbdev core | |
1074 | */ | |
1075 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
1076 | const struct fb_copyarea *area) | |
1077 | { | |
1078 | cfb_copyarea(info, area); | |
eaa434de NT |
1079 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1080 | area->width, area->height); | |
742547b7 AT |
1081 | } |
1082 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
1083 | ||
1084 | /** | |
1085 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
1086 | * @info: fbdev registered by the helper | |
1087 | * @image: info about image to blit | |
1088 | * | |
1089 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1090 | */ | |
1091 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
1092 | const struct fb_image *image) | |
1093 | { | |
1094 | cfb_imageblit(info, image); | |
eaa434de NT |
1095 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1096 | image->width, image->height); | |
742547b7 AT |
1097 | } |
1098 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
1099 | ||
fdefa58a AT |
1100 | /** |
1101 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
1102 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1103 | * @suspend: whether to suspend or resume |
fdefa58a | 1104 | * |
cfe63423 NT |
1105 | * A wrapper around fb_set_suspend implemented by fbdev core. |
1106 | * Use drm_fb_helper_set_suspend_unlocked() if you don't need to take | |
1107 | * the lock yourself | |
fdefa58a | 1108 | */ |
28579f37 | 1109 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend) |
fdefa58a AT |
1110 | { |
1111 | if (fb_helper && fb_helper->fbdev) | |
28579f37 | 1112 | fb_set_suspend(fb_helper->fbdev, suspend); |
fdefa58a AT |
1113 | } |
1114 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
1115 | ||
cfe63423 NT |
1116 | /** |
1117 | * drm_fb_helper_set_suspend_unlocked - wrapper around fb_set_suspend that also | |
1118 | * takes the console lock | |
1119 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1120 | * @suspend: whether to suspend or resume |
cfe63423 NT |
1121 | * |
1122 | * A wrapper around fb_set_suspend() that takes the console lock. If the lock | |
1123 | * isn't available on resume, a worker is tasked with waiting for the lock | |
1124 | * to become available. The console lock can be pretty contented on resume | |
1125 | * due to all the printk activity. | |
1126 | * | |
1127 | * This function can be called multiple times with the same state since | |
6806cdf9 | 1128 | * &fb_info.state is checked to see if fbdev is running or not before locking. |
cfe63423 NT |
1129 | * |
1130 | * Use drm_fb_helper_set_suspend() if you need to take the lock yourself. | |
1131 | */ | |
1132 | void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, | |
28579f37 | 1133 | bool suspend) |
cfe63423 NT |
1134 | { |
1135 | if (!fb_helper || !fb_helper->fbdev) | |
1136 | return; | |
1137 | ||
1138 | /* make sure there's no pending/ongoing resume */ | |
1139 | flush_work(&fb_helper->resume_work); | |
1140 | ||
1141 | if (suspend) { | |
1142 | if (fb_helper->fbdev->state != FBINFO_STATE_RUNNING) | |
1143 | return; | |
1144 | ||
1145 | console_lock(); | |
1146 | ||
1147 | } else { | |
1148 | if (fb_helper->fbdev->state == FBINFO_STATE_RUNNING) | |
1149 | return; | |
1150 | ||
1151 | if (!console_trylock()) { | |
1152 | schedule_work(&fb_helper->resume_work); | |
1153 | return; | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | fb_set_suspend(fb_helper->fbdev, suspend); | |
1158 | console_unlock(); | |
1159 | } | |
1160 | EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked); | |
1161 | ||
c850cb78 | 1162 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
1163 | u16 blue, u16 regno, struct fb_info *info) |
1164 | { | |
1165 | struct drm_fb_helper *fb_helper = info->par; | |
1166 | struct drm_framebuffer *fb = fb_helper->fb; | |
b8c00ac5 | 1167 | |
c850cb78 DA |
1168 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
1169 | u32 *palette; | |
1170 | u32 value; | |
1171 | /* place color in psuedopalette */ | |
1172 | if (regno > 16) | |
1173 | return -EINVAL; | |
1174 | palette = (u32 *)info->pseudo_palette; | |
1175 | red >>= (16 - info->var.red.length); | |
1176 | green >>= (16 - info->var.green.length); | |
1177 | blue >>= (16 - info->var.blue.length); | |
1178 | value = (red << info->var.red.offset) | | |
1179 | (green << info->var.green.offset) | | |
1180 | (blue << info->var.blue.offset); | |
9da12b6a RC |
1181 | if (info->var.transp.length > 0) { |
1182 | u32 mask = (1 << info->var.transp.length) - 1; | |
4b4f99f5 | 1183 | |
9da12b6a RC |
1184 | mask <<= info->var.transp.offset; |
1185 | value |= mask; | |
1186 | } | |
c850cb78 DA |
1187 | palette[regno] = value; |
1188 | return 0; | |
1189 | } | |
1190 | ||
04c0c569 VS |
1191 | /* |
1192 | * The driver really shouldn't advertise pseudo/directcolor | |
1193 | * visuals if it can't deal with the palette. | |
1194 | */ | |
1195 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1196 | !fb_helper->funcs->gamma_get)) | |
1197 | return -EINVAL; | |
1198 | ||
272725c7 | 1199 | WARN_ON(fb->format->cpp[0] != 1); |
b8c00ac5 | 1200 | |
fef1480d | 1201 | fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); |
b8c00ac5 | 1202 | |
c850cb78 | 1203 | return 0; |
b8c00ac5 DA |
1204 | } |
1205 | ||
207fd329 | 1206 | /** |
6806cdf9 | 1207 | * drm_fb_helper_setcmap - implementation for &fb_ops.fb_setcmap |
207fd329 DV |
1208 | * @cmap: cmap to set |
1209 | * @info: fbdev registered by the helper | |
1210 | */ | |
068143d3 DA |
1211 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1212 | { | |
1213 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1214 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1215 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1216 | u16 *red, *green, *blue, *transp; |
1217 | struct drm_crtc *crtc; | |
062ac622 | 1218 | int i, j, rc = 0; |
068143d3 DA |
1219 | int start; |
1220 | ||
c50bfd08 | 1221 | if (oops_in_progress) |
9aa609e1 | 1222 | return -EBUSY; |
c50bfd08 DV |
1223 | |
1224 | drm_modeset_lock_all(dev); | |
8391a3d5 VS |
1225 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1226 | drm_modeset_unlock_all(dev); | |
1227 | return -EBUSY; | |
1228 | } | |
1229 | ||
8be48d92 DA |
1230 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1231 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1232 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1233 | |
1234 | red = cmap->red; | |
1235 | green = cmap->green; | |
1236 | blue = cmap->blue; | |
1237 | transp = cmap->transp; | |
1238 | start = cmap->start; | |
1239 | ||
062ac622 | 1240 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1241 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1242 | ||
1243 | hred = *red++; | |
1244 | hgreen = *green++; | |
1245 | hblue = *blue++; | |
1246 | ||
1247 | if (transp) | |
1248 | htransp = *transp++; | |
1249 | ||
c850cb78 DA |
1250 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1251 | if (rc) | |
8391a3d5 | 1252 | goto out; |
068143d3 | 1253 | } |
04c0c569 VS |
1254 | if (crtc_funcs->load_lut) |
1255 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1256 | } |
8391a3d5 VS |
1257 | out: |
1258 | drm_modeset_unlock_all(dev); | |
068143d3 DA |
1259 | return rc; |
1260 | } | |
1261 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1262 | ||
0f3bbe07 MR |
1263 | /** |
1264 | * drm_fb_helper_ioctl - legacy ioctl implementation | |
1265 | * @info: fbdev registered by the helper | |
1266 | * @cmd: ioctl command | |
1267 | * @arg: ioctl argument | |
1268 | * | |
1269 | * A helper to implement the standard fbdev ioctl. Only | |
1270 | * FBIO_WAITFORVSYNC is implemented for now. | |
1271 | */ | |
1272 | int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd, | |
1273 | unsigned long arg) | |
1274 | { | |
1275 | struct drm_fb_helper *fb_helper = info->par; | |
1276 | struct drm_device *dev = fb_helper->dev; | |
1277 | struct drm_mode_set *mode_set; | |
1278 | struct drm_crtc *crtc; | |
1279 | int ret = 0; | |
1280 | ||
1281 | mutex_lock(&dev->mode_config.mutex); | |
1282 | if (!drm_fb_helper_is_bound(fb_helper)) { | |
1283 | ret = -EBUSY; | |
1284 | goto unlock; | |
1285 | } | |
1286 | ||
1287 | switch (cmd) { | |
1288 | case FBIO_WAITFORVSYNC: | |
1289 | /* | |
1290 | * Only consider the first CRTC. | |
1291 | * | |
1292 | * This ioctl is supposed to take the CRTC number as | |
1293 | * an argument, but in fbdev times, what that number | |
1294 | * was supposed to be was quite unclear, different | |
1295 | * drivers were passing that argument differently | |
1296 | * (some by reference, some by value), and most of the | |
1297 | * userspace applications were just hardcoding 0 as an | |
1298 | * argument. | |
1299 | * | |
1300 | * The first CRTC should be the integrated panel on | |
1301 | * most drivers, so this is the best choice we can | |
1302 | * make. If we're not smart enough here, one should | |
1303 | * just consider switch the userspace to KMS. | |
1304 | */ | |
1305 | mode_set = &fb_helper->crtc_info[0].mode_set; | |
1306 | crtc = mode_set->crtc; | |
1307 | ||
1308 | /* | |
1309 | * Only wait for a vblank event if the CRTC is | |
1310 | * enabled, otherwise just don't do anythintg, | |
1311 | * not even report an error. | |
1312 | */ | |
1313 | ret = drm_crtc_vblank_get(crtc); | |
1314 | if (!ret) { | |
1315 | drm_crtc_wait_one_vblank(crtc); | |
1316 | drm_crtc_vblank_put(crtc); | |
1317 | } | |
1318 | ||
1319 | ret = 0; | |
1320 | goto unlock; | |
1321 | default: | |
1322 | ret = -ENOTTY; | |
1323 | } | |
1324 | ||
1325 | unlock: | |
1326 | mutex_unlock(&dev->mode_config.mutex); | |
1327 | return ret; | |
1328 | } | |
1329 | EXPORT_SYMBOL(drm_fb_helper_ioctl); | |
1330 | ||
207fd329 | 1331 | /** |
6806cdf9 | 1332 | * drm_fb_helper_check_var - implementation for &fb_ops.fb_check_var |
207fd329 DV |
1333 | * @var: screeninfo to check |
1334 | * @info: fbdev registered by the helper | |
1335 | */ | |
785b93ef DA |
1336 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1337 | struct fb_info *info) | |
1338 | { | |
1339 | struct drm_fb_helper *fb_helper = info->par; | |
1340 | struct drm_framebuffer *fb = fb_helper->fb; | |
1341 | int depth; | |
1342 | ||
f90ebd9e | 1343 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1344 | return -EINVAL; |
1345 | ||
865afb11 SA |
1346 | /* |
1347 | * Changes struct fb_var_screeninfo are currently not pushed back | |
1348 | * to KMS, hence fail if different settings are requested. | |
1349 | */ | |
272725c7 | 1350 | if (var->bits_per_pixel != fb->format->cpp[0] * 8 || |
12ffed96 MD |
1351 | var->xres > fb->width || var->yres > fb->height || |
1352 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
1353 | DRM_DEBUG("fb requested width/height/bpp can't fit in current fb " | |
62fb376e CW |
1354 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1355 | var->xres, var->yres, var->bits_per_pixel, | |
1356 | var->xres_virtual, var->yres_virtual, | |
272725c7 | 1357 | fb->width, fb->height, fb->format->cpp[0] * 8); |
785b93ef DA |
1358 | return -EINVAL; |
1359 | } | |
1360 | ||
1361 | switch (var->bits_per_pixel) { | |
1362 | case 16: | |
1363 | depth = (var->green.length == 6) ? 16 : 15; | |
1364 | break; | |
1365 | case 32: | |
1366 | depth = (var->transp.length > 0) ? 32 : 24; | |
1367 | break; | |
1368 | default: | |
1369 | depth = var->bits_per_pixel; | |
1370 | break; | |
1371 | } | |
1372 | ||
1373 | switch (depth) { | |
1374 | case 8: | |
1375 | var->red.offset = 0; | |
1376 | var->green.offset = 0; | |
1377 | var->blue.offset = 0; | |
1378 | var->red.length = 8; | |
1379 | var->green.length = 8; | |
1380 | var->blue.length = 8; | |
1381 | var->transp.length = 0; | |
1382 | var->transp.offset = 0; | |
1383 | break; | |
1384 | case 15: | |
1385 | var->red.offset = 10; | |
1386 | var->green.offset = 5; | |
1387 | var->blue.offset = 0; | |
1388 | var->red.length = 5; | |
1389 | var->green.length = 5; | |
1390 | var->blue.length = 5; | |
1391 | var->transp.length = 1; | |
1392 | var->transp.offset = 15; | |
1393 | break; | |
1394 | case 16: | |
1395 | var->red.offset = 11; | |
1396 | var->green.offset = 5; | |
1397 | var->blue.offset = 0; | |
1398 | var->red.length = 5; | |
1399 | var->green.length = 6; | |
1400 | var->blue.length = 5; | |
1401 | var->transp.length = 0; | |
1402 | var->transp.offset = 0; | |
1403 | break; | |
1404 | case 24: | |
1405 | var->red.offset = 16; | |
1406 | var->green.offset = 8; | |
1407 | var->blue.offset = 0; | |
1408 | var->red.length = 8; | |
1409 | var->green.length = 8; | |
1410 | var->blue.length = 8; | |
1411 | var->transp.length = 0; | |
1412 | var->transp.offset = 0; | |
1413 | break; | |
1414 | case 32: | |
1415 | var->red.offset = 16; | |
1416 | var->green.offset = 8; | |
1417 | var->blue.offset = 0; | |
1418 | var->red.length = 8; | |
1419 | var->green.length = 8; | |
1420 | var->blue.length = 8; | |
1421 | var->transp.length = 8; | |
1422 | var->transp.offset = 24; | |
1423 | break; | |
1424 | default: | |
1425 | return -EINVAL; | |
1426 | } | |
1427 | return 0; | |
1428 | } | |
1429 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1430 | ||
207fd329 | 1431 | /** |
6806cdf9 | 1432 | * drm_fb_helper_set_par - implementation for &fb_ops.fb_set_par |
207fd329 DV |
1433 | * @info: fbdev registered by the helper |
1434 | * | |
1435 | * This will let fbcon do the mode init and is called at initialization time by | |
1436 | * the fbdev core when registering the driver, and later on through the hotplug | |
1437 | * callback. | |
1438 | */ | |
785b93ef DA |
1439 | int drm_fb_helper_set_par(struct fb_info *info) |
1440 | { | |
1441 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1442 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1443 | |
c50bfd08 DV |
1444 | if (oops_in_progress) |
1445 | return -EBUSY; | |
1446 | ||
5349ef31 | 1447 | if (var->pixclock != 0) { |
172e91f5 | 1448 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1449 | return -EINVAL; |
1450 | } | |
1451 | ||
5ea1f752 | 1452 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1453 | |
785b93ef DA |
1454 | return 0; |
1455 | } | |
1456 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1457 | ||
1edf0269 | 1458 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1459 | struct fb_info *info) |
1edf0269 RC |
1460 | { |
1461 | struct drm_fb_helper *fb_helper = info->par; | |
1462 | struct drm_device *dev = fb_helper->dev; | |
1463 | struct drm_atomic_state *state; | |
07d3bad6 | 1464 | struct drm_plane *plane; |
1edf0269 | 1465 | int i, ret; |
4b4f99f5 | 1466 | unsigned int plane_mask; |
1edf0269 RC |
1467 | |
1468 | state = drm_atomic_state_alloc(dev); | |
1469 | if (!state) | |
1470 | return -ENOMEM; | |
1471 | ||
1472 | state->acquire_ctx = dev->mode_config.acquire_ctx; | |
1473 | retry: | |
07d3bad6 | 1474 | plane_mask = 0; |
4b4f99f5 | 1475 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1edf0269 RC |
1476 | struct drm_mode_set *mode_set; |
1477 | ||
1478 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1479 | ||
1480 | mode_set->x = var->xoffset; | |
1481 | mode_set->y = var->yoffset; | |
1482 | ||
1483 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1484 | if (ret != 0) | |
1485 | goto fail; | |
07d3bad6 ML |
1486 | |
1487 | plane = mode_set->crtc->primary; | |
7118fd9b | 1488 | plane_mask |= (1 << drm_plane_index(plane)); |
07d3bad6 | 1489 | plane->old_fb = plane->fb; |
1edf0269 RC |
1490 | } |
1491 | ||
1492 | ret = drm_atomic_commit(state); | |
1493 | if (ret != 0) | |
1494 | goto fail; | |
1495 | ||
1496 | info->var.xoffset = var->xoffset; | |
1497 | info->var.yoffset = var->yoffset; | |
1498 | ||
1edf0269 | 1499 | fail: |
07d3bad6 | 1500 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
a0fb6ad7 | 1501 | |
1edf0269 RC |
1502 | if (ret == -EDEADLK) |
1503 | goto backoff; | |
1504 | ||
0853695c | 1505 | drm_atomic_state_put(state); |
1edf0269 RC |
1506 | return ret; |
1507 | ||
1508 | backoff: | |
1509 | drm_atomic_state_clear(state); | |
1510 | drm_atomic_legacy_backoff(state); | |
1511 | ||
1512 | goto retry; | |
1513 | } | |
1514 | ||
207fd329 | 1515 | /** |
6806cdf9 | 1516 | * drm_fb_helper_pan_display - implementation for &fb_ops.fb_pan_display |
207fd329 DV |
1517 | * @var: updated screen information |
1518 | * @info: fbdev registered by the helper | |
1519 | */ | |
785b93ef DA |
1520 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
1521 | struct fb_info *info) | |
1522 | { | |
1523 | struct drm_fb_helper *fb_helper = info->par; | |
1524 | struct drm_device *dev = fb_helper->dev; | |
1525 | struct drm_mode_set *modeset; | |
785b93ef DA |
1526 | int ret = 0; |
1527 | int i; | |
1528 | ||
c50bfd08 | 1529 | if (oops_in_progress) |
9aa609e1 | 1530 | return -EBUSY; |
c50bfd08 DV |
1531 | |
1532 | drm_modeset_lock_all(dev); | |
20c60c35 DV |
1533 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1534 | drm_modeset_unlock_all(dev); | |
1535 | return -EBUSY; | |
1536 | } | |
1537 | ||
a743d758 | 1538 | if (drm_drv_uses_atomic_modeset(dev)) { |
1edf0269 RC |
1539 | ret = pan_display_atomic(var, info); |
1540 | goto unlock; | |
1541 | } | |
1542 | ||
8be48d92 | 1543 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1544 | modeset = &fb_helper->crtc_info[i].mode_set; |
1545 | ||
1546 | modeset->x = var->xoffset; | |
1547 | modeset->y = var->yoffset; | |
1548 | ||
1549 | if (modeset->num_connectors) { | |
2d13b679 | 1550 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1551 | if (!ret) { |
1552 | info->var.xoffset = var->xoffset; | |
1553 | info->var.yoffset = var->yoffset; | |
1554 | } | |
1555 | } | |
1556 | } | |
1edf0269 | 1557 | unlock: |
84849903 | 1558 | drm_modeset_unlock_all(dev); |
785b93ef DA |
1559 | return ret; |
1560 | } | |
1561 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1562 | ||
8acf658a | 1563 | /* |
207fd329 DV |
1564 | * Allocates the backing storage and sets up the fbdev info structure through |
1565 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1566 | * notifier. | |
8acf658a | 1567 | */ |
de1ace5b DV |
1568 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1569 | int preferred_bpp) | |
785b93ef | 1570 | { |
8acf658a | 1571 | int ret = 0; |
785b93ef | 1572 | int crtc_count = 0; |
4abe3520 | 1573 | int i; |
38651674 | 1574 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1575 | int gamma_size = 0; |
38651674 DA |
1576 | |
1577 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1578 | sizes.surface_depth = 24; | |
1579 | sizes.surface_bpp = 32; | |
4b4f99f5 TR |
1580 | sizes.fb_width = (u32)-1; |
1581 | sizes.fb_height = (u32)-1; | |
785b93ef | 1582 | |
4b4f99f5 | 1583 | /* if driver picks 8 or 16 by default use that for both depth/bpp */ |
96081cdf | 1584 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1585 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1586 | |
785b93ef | 1587 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
966a6a13 | 1588 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1589 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; |
1794d257 | 1590 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1591 | |
eaf99c74 | 1592 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1593 | |
1594 | if (cmdline_mode->bpp_specified) { | |
1595 | switch (cmdline_mode->bpp) { | |
1596 | case 8: | |
38651674 | 1597 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1598 | break; |
1599 | case 15: | |
38651674 DA |
1600 | sizes.surface_depth = 15; |
1601 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1602 | break; |
1603 | case 16: | |
38651674 | 1604 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1605 | break; |
1606 | case 24: | |
38651674 | 1607 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1608 | break; |
1609 | case 32: | |
38651674 DA |
1610 | sizes.surface_depth = 24; |
1611 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1612 | break; |
1613 | } | |
1614 | break; | |
1615 | } | |
1616 | } | |
1617 | ||
8be48d92 DA |
1618 | crtc_count = 0; |
1619 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1620 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1621 | struct drm_mode_set *mode_set; |
1622 | int x, y, j; | |
1623 | /* in case of tile group, are we the last tile vert or horiz? | |
1624 | * If no tile group you are always the last one both vertically | |
1625 | * and horizontally | |
1626 | */ | |
1627 | bool lastv = true, lasth = true; | |
675c8328 | 1628 | |
8be48d92 | 1629 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1630 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1631 | |
1632 | if (!desired_mode) | |
1633 | continue; | |
1634 | ||
1635 | crtc_count++; | |
1636 | ||
b0ee9e7f DA |
1637 | x = fb_helper->crtc_info[i].x; |
1638 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1639 | |
1640 | if (gamma_size == 0) | |
1641 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1642 | ||
1643 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1644 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1645 | |
1646 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1647 | struct drm_connector *connector = mode_set->connectors[j]; | |
4b4f99f5 | 1648 | |
0e3704c9 RC |
1649 | if (connector->has_tile) { |
1650 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1651 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1652 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1653 | break; | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | if (lasth) | |
1658 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1659 | if (lastv) | |
1660 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1661 | } |
1662 | ||
38651674 | 1663 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
4b4f99f5 TR |
1664 | /* |
1665 | * hmm everyone went away - assume VGA cable just fell out | |
1666 | * and will come back later. | |
1667 | */ | |
eb1f8e4f | 1668 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1669 | sizes.fb_width = sizes.surface_width = 1024; |
1670 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1671 | } |
1672 | ||
5f152576 XL |
1673 | /* Handle our overallocation */ |
1674 | sizes.surface_height *= drm_fbdev_overalloc; | |
1675 | sizes.surface_height /= 100; | |
1676 | ||
38651674 | 1677 | /* push down into drivers */ |
8acf658a DV |
1678 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1679 | if (ret < 0) | |
1680 | return ret; | |
785b93ef | 1681 | |
7e53f3a4 DV |
1682 | /* |
1683 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1684 | * events, but at init time drm_setup_crtcs needs to be called before | |
1685 | * the fb is allocated (since we need to figure out the desired size of | |
1686 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1687 | * here again. | |
1688 | */ | |
96081cdf | 1689 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1690 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1691 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1692 | ||
785b93ef DA |
1693 | return 0; |
1694 | } | |
785b93ef | 1695 | |
207fd329 DV |
1696 | /** |
1697 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1698 | * @info: fbdev registered by the helper | |
1699 | * @pitch: desired pitch | |
1700 | * @depth: desired depth | |
1701 | * | |
1702 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1703 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1704 | * additional constraints need to set up their own limits. | |
1705 | * | |
1706 | * Drivers should call this (or their equivalent setup code) from their | |
6806cdf9 | 1707 | * &drm_fb_helper_funcs.fb_probe callback. |
207fd329 | 1708 | */ |
3632ef89 DA |
1709 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1710 | uint32_t depth) | |
1711 | { | |
1712 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1713 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1714 | FB_VISUAL_TRUECOLOR; | |
1715 | info->fix.mmio_start = 0; | |
1716 | info->fix.mmio_len = 0; | |
1717 | info->fix.type_aux = 0; | |
1718 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1719 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1720 | info->fix.ywrapstep = 0; | |
1721 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1722 | |
1723 | info->fix.line_length = pitch; | |
3632ef89 DA |
1724 | } |
1725 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1726 | ||
207fd329 DV |
1727 | /** |
1728 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1729 | * @info: fbdev instance to set up | |
1730 | * @fb_helper: fb helper instance to use as template | |
1731 | * @fb_width: desired fb width | |
1732 | * @fb_height: desired fb height | |
1733 | * | |
1734 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
6806cdf9 | 1735 | * and the drm framebuffer allocated in &drm_fb_helper.fb. |
207fd329 DV |
1736 | * |
1737 | * Drivers should call this (or their equivalent setup code) from their | |
6806cdf9 DV |
1738 | * &drm_fb_helper_funcs.fb_probe callback after having allocated the fbdev |
1739 | * backing storage framebuffer. | |
207fd329 | 1740 | */ |
38651674 | 1741 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1742 | uint32_t fb_width, uint32_t fb_height) |
1743 | { | |
38651674 | 1744 | struct drm_framebuffer *fb = fb_helper->fb; |
4b4f99f5 | 1745 | |
38651674 | 1746 | info->pseudo_palette = fb_helper->pseudo_palette; |
785b93ef DA |
1747 | info->var.xres_virtual = fb->width; |
1748 | info->var.yres_virtual = fb->height; | |
272725c7 | 1749 | info->var.bits_per_pixel = fb->format->cpp[0] * 8; |
57084d05 | 1750 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1751 | info->var.xoffset = 0; |
1752 | info->var.yoffset = 0; | |
1753 | info->var.activate = FB_ACTIVATE_NOW; | |
1754 | info->var.height = -1; | |
1755 | info->var.width = -1; | |
1756 | ||
b00c600e | 1757 | switch (fb->format->depth) { |
785b93ef DA |
1758 | case 8: |
1759 | info->var.red.offset = 0; | |
1760 | info->var.green.offset = 0; | |
1761 | info->var.blue.offset = 0; | |
1762 | info->var.red.length = 8; /* 8bit DAC */ | |
1763 | info->var.green.length = 8; | |
1764 | info->var.blue.length = 8; | |
1765 | info->var.transp.offset = 0; | |
1766 | info->var.transp.length = 0; | |
1767 | break; | |
1768 | case 15: | |
1769 | info->var.red.offset = 10; | |
1770 | info->var.green.offset = 5; | |
1771 | info->var.blue.offset = 0; | |
1772 | info->var.red.length = 5; | |
1773 | info->var.green.length = 5; | |
1774 | info->var.blue.length = 5; | |
1775 | info->var.transp.offset = 15; | |
1776 | info->var.transp.length = 1; | |
1777 | break; | |
1778 | case 16: | |
1779 | info->var.red.offset = 11; | |
1780 | info->var.green.offset = 5; | |
1781 | info->var.blue.offset = 0; | |
1782 | info->var.red.length = 5; | |
1783 | info->var.green.length = 6; | |
1784 | info->var.blue.length = 5; | |
1785 | info->var.transp.offset = 0; | |
1786 | break; | |
1787 | case 24: | |
1788 | info->var.red.offset = 16; | |
1789 | info->var.green.offset = 8; | |
1790 | info->var.blue.offset = 0; | |
1791 | info->var.red.length = 8; | |
1792 | info->var.green.length = 8; | |
1793 | info->var.blue.length = 8; | |
1794 | info->var.transp.offset = 0; | |
1795 | info->var.transp.length = 0; | |
1796 | break; | |
1797 | case 32: | |
1798 | info->var.red.offset = 16; | |
1799 | info->var.green.offset = 8; | |
1800 | info->var.blue.offset = 0; | |
1801 | info->var.red.length = 8; | |
1802 | info->var.green.length = 8; | |
1803 | info->var.blue.length = 8; | |
1804 | info->var.transp.offset = 24; | |
1805 | info->var.transp.length = 8; | |
1806 | break; | |
1807 | default: | |
1808 | break; | |
1809 | } | |
1810 | ||
1811 | info->var.xres = fb_width; | |
1812 | info->var.yres = fb_height; | |
1813 | } | |
1814 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1815 | |
0b4c0f3f DA |
1816 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1817 | uint32_t maxX, | |
1818 | uint32_t maxY) | |
38651674 DA |
1819 | { |
1820 | struct drm_connector *connector; | |
1821 | int count = 0; | |
0b4c0f3f | 1822 | int i; |
38651674 | 1823 | |
966a6a13 | 1824 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1825 | connector = fb_helper->connector_info[i]->connector; |
38651674 DA |
1826 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1827 | } | |
1828 | ||
1829 | return count; | |
1830 | } | |
1831 | ||
2f1046f3 | 1832 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1833 | { |
1834 | struct drm_display_mode *mode; | |
1835 | ||
0b4c0f3f | 1836 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1837 | if (mode->hdisplay > width || |
1838 | mode->vdisplay > height) | |
38651674 DA |
1839 | continue; |
1840 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1841 | return mode; | |
1842 | } | |
1843 | return NULL; | |
1844 | } | |
2f1046f3 | 1845 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1846 | |
0b4c0f3f | 1847 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1848 | { |
eaf99c74 | 1849 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1850 | } |
1851 | ||
a09759e8 | 1852 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn) |
38651674 | 1853 | { |
1794d257 | 1854 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1855 | struct drm_display_mode *mode; |
c683f427 | 1856 | bool prefer_non_interlace; |
38651674 | 1857 | |
eaf99c74 | 1858 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1859 | if (cmdline_mode->specified == false) |
f3af5c7d | 1860 | return NULL; |
38651674 DA |
1861 | |
1862 | /* attempt to find a matching mode in the list of modes | |
1863 | * we have gotten so far, if not add a CVT mode that conforms | |
1864 | */ | |
1865 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1866 | goto create_mode; | |
1867 | ||
c683f427 | 1868 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1869 | again: |
0b4c0f3f | 1870 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1871 | /* check width/height */ |
1872 | if (mode->hdisplay != cmdline_mode->xres || | |
1873 | mode->vdisplay != cmdline_mode->yres) | |
1874 | continue; | |
1875 | ||
1876 | if (cmdline_mode->refresh_specified) { | |
1877 | if (mode->vrefresh != cmdline_mode->refresh) | |
1878 | continue; | |
1879 | } | |
1880 | ||
1881 | if (cmdline_mode->interlace) { | |
1882 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1883 | continue; | |
c683f427 TI |
1884 | } else if (prefer_non_interlace) { |
1885 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1886 | continue; | |
38651674 DA |
1887 | } |
1888 | return mode; | |
1889 | } | |
1890 | ||
c683f427 TI |
1891 | if (prefer_non_interlace) { |
1892 | prefer_non_interlace = false; | |
1893 | goto again; | |
1894 | } | |
1895 | ||
38651674 | 1896 | create_mode: |
1794d257 CW |
1897 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1898 | cmdline_mode); | |
0b4c0f3f | 1899 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1900 | return mode; |
1901 | } | |
2f1046f3 | 1902 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1903 | |
1904 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1905 | { | |
1906 | bool enable; | |
1907 | ||
96081cdf | 1908 | if (strict) |
38651674 | 1909 | enable = connector->status == connector_status_connected; |
96081cdf | 1910 | else |
38651674 | 1911 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1912 | |
38651674 DA |
1913 | return enable; |
1914 | } | |
1915 | ||
0b4c0f3f DA |
1916 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1917 | bool *enabled) | |
38651674 DA |
1918 | { |
1919 | bool any_enabled = false; | |
1920 | struct drm_connector *connector; | |
1921 | int i = 0; | |
1922 | ||
966a6a13 | 1923 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1924 | connector = fb_helper->connector_info[i]->connector; |
38651674 DA |
1925 | enabled[i] = drm_connector_enabled(connector, true); |
1926 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1927 | enabled[i] ? "yes" : "no"); | |
1928 | any_enabled |= enabled[i]; | |
38651674 DA |
1929 | } |
1930 | ||
1931 | if (any_enabled) | |
1932 | return; | |
1933 | ||
966a6a13 | 1934 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1935 | connector = fb_helper->connector_info[i]->connector; |
38651674 | 1936 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1937 | } |
1938 | } | |
1939 | ||
1d42bbc8 DA |
1940 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1941 | struct drm_display_mode **modes, | |
b0ee9e7f | 1942 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
1943 | bool *enabled, int width, int height) |
1944 | { | |
1945 | int count, i, j; | |
1946 | bool can_clone = false; | |
1947 | struct drm_fb_helper_connector *fb_helper_conn; | |
1948 | struct drm_display_mode *dmt_mode, *mode; | |
1949 | ||
1950 | /* only contemplate cloning in the single crtc case */ | |
1951 | if (fb_helper->crtc_count > 1) | |
1952 | return false; | |
1953 | ||
1954 | count = 0; | |
966a6a13 | 1955 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1956 | if (enabled[i]) |
1957 | count++; | |
1958 | } | |
1959 | ||
1960 | /* only contemplate cloning if more than one connector is enabled */ | |
1961 | if (count <= 1) | |
1962 | return false; | |
1963 | ||
1964 | /* check the command line or if nothing common pick 1024x768 */ | |
1965 | can_clone = true; | |
966a6a13 | 1966 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1967 | if (!enabled[i]) |
1968 | continue; | |
1969 | fb_helper_conn = fb_helper->connector_info[i]; | |
a09759e8 | 1970 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn); |
1d42bbc8 DA |
1971 | if (!modes[i]) { |
1972 | can_clone = false; | |
1973 | break; | |
1974 | } | |
1975 | for (j = 0; j < i; j++) { | |
1976 | if (!enabled[j]) | |
1977 | continue; | |
1978 | if (!drm_mode_equal(modes[j], modes[i])) | |
1979 | can_clone = false; | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | if (can_clone) { | |
1984 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1985 | return true; | |
1986 | } | |
1987 | ||
1988 | /* try and find a 1024x768 mode on each connector */ | |
1989 | can_clone = true; | |
f6e252ba | 1990 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 | 1991 | |
966a6a13 | 1992 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
1993 | if (!enabled[i]) |
1994 | continue; | |
1995 | ||
1996 | fb_helper_conn = fb_helper->connector_info[i]; | |
1997 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1998 | if (drm_mode_equal(mode, dmt_mode)) | |
1999 | modes[i] = mode; | |
2000 | } | |
2001 | if (!modes[i]) | |
2002 | can_clone = false; | |
2003 | } | |
2004 | ||
2005 | if (can_clone) { | |
2006 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
2007 | return true; | |
2008 | } | |
2009 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
2010 | return false; | |
2011 | } | |
2012 | ||
b0ee9e7f DA |
2013 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
2014 | struct drm_display_mode **modes, | |
2015 | struct drm_fb_offset *offsets, | |
2016 | int idx, | |
2017 | int h_idx, int v_idx) | |
2018 | { | |
2019 | struct drm_fb_helper_connector *fb_helper_conn; | |
2020 | int i; | |
2021 | int hoffset = 0, voffset = 0; | |
2022 | ||
966a6a13 | 2023 | drm_fb_helper_for_each_connector(fb_helper, i) { |
b0ee9e7f DA |
2024 | fb_helper_conn = fb_helper->connector_info[i]; |
2025 | if (!fb_helper_conn->connector->has_tile) | |
2026 | continue; | |
2027 | ||
2028 | if (!modes[i] && (h_idx || v_idx)) { | |
2029 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
2030 | fb_helper_conn->connector->base.id); | |
2031 | continue; | |
2032 | } | |
2033 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
2034 | hoffset += modes[i]->hdisplay; | |
2035 | ||
2036 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
2037 | voffset += modes[i]->vdisplay; | |
2038 | } | |
2039 | offsets[idx].x = hoffset; | |
2040 | offsets[idx].y = voffset; | |
2041 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
2042 | return 0; | |
2043 | } | |
2044 | ||
0b4c0f3f | 2045 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 2046 | struct drm_display_mode **modes, |
b0ee9e7f | 2047 | struct drm_fb_offset *offsets, |
38651674 DA |
2048 | bool *enabled, int width, int height) |
2049 | { | |
0b4c0f3f | 2050 | struct drm_fb_helper_connector *fb_helper_conn; |
c96521ee CW |
2051 | const u64 mask = BIT_ULL(fb_helper->connector_count) - 1; |
2052 | u64 conn_configured = 0; | |
b0ee9e7f | 2053 | int tile_pass = 0; |
c96521ee CW |
2054 | int i; |
2055 | ||
b0ee9e7f | 2056 | retry: |
966a6a13 | 2057 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 2058 | fb_helper_conn = fb_helper->connector_info[i]; |
38651674 | 2059 | |
c96521ee | 2060 | if (conn_configured & BIT_ULL(i)) |
b0ee9e7f DA |
2061 | continue; |
2062 | ||
2063 | if (enabled[i] == false) { | |
c96521ee | 2064 | conn_configured |= BIT_ULL(i); |
b0ee9e7f DA |
2065 | continue; |
2066 | } | |
2067 | ||
2068 | /* first pass over all the untiled connectors */ | |
2069 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 2070 | continue; |
38651674 | 2071 | |
b0ee9e7f DA |
2072 | if (tile_pass == 1) { |
2073 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
2074 | fb_helper_conn->connector->tile_v_loc != 0) | |
2075 | continue; | |
2076 | ||
2077 | } else { | |
4b4f99f5 | 2078 | if (fb_helper_conn->connector->tile_h_loc != tile_pass - 1 && |
b0ee9e7f DA |
2079 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) |
2080 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
2081 | continue; | |
2082 | ||
4b4f99f5 TR |
2083 | /* |
2084 | * find the tile offsets for this pass - need to find | |
2085 | * all tiles left and above | |
2086 | */ | |
b0ee9e7f DA |
2087 | drm_get_tile_offsets(fb_helper, modes, offsets, |
2088 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
2089 | } | |
38651674 | 2090 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 2091 | fb_helper_conn->connector->base.id); |
38651674 DA |
2092 | |
2093 | /* got for command line mode first */ | |
a09759e8 | 2094 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn); |
38651674 | 2095 | if (!modes[i]) { |
b0ee9e7f DA |
2096 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
2097 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 2098 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
2099 | } |
2100 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
2101 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
2102 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
2103 | break; |
2104 | } | |
2105 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
2106 | "none"); | |
c96521ee | 2107 | conn_configured |= BIT_ULL(i); |
b0ee9e7f DA |
2108 | } |
2109 | ||
2110 | if ((conn_configured & mask) != mask) { | |
2111 | tile_pass++; | |
2112 | goto retry; | |
38651674 DA |
2113 | } |
2114 | return true; | |
2115 | } | |
2116 | ||
8be48d92 DA |
2117 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
2118 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
2119 | struct drm_display_mode **modes, |
2120 | int n, int width, int height) | |
2121 | { | |
2122 | int c, o; | |
2123 | struct drm_connector *connector; | |
be26a66d | 2124 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 2125 | struct drm_encoder *encoder; |
38651674 | 2126 | int my_score, best_score, score; |
8be48d92 | 2127 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 2128 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 2129 | |
0b4c0f3f | 2130 | if (n == fb_helper->connector_count) |
38651674 | 2131 | return 0; |
0b4c0f3f DA |
2132 | |
2133 | fb_helper_conn = fb_helper->connector_info[n]; | |
2134 | connector = fb_helper_conn->connector; | |
38651674 DA |
2135 | |
2136 | best_crtcs[n] = NULL; | |
8be48d92 | 2137 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
2138 | if (modes[n] == NULL) |
2139 | return best_score; | |
2140 | ||
255f0e7c | 2141 | crtcs = kzalloc(fb_helper->connector_count * |
8be48d92 | 2142 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
2143 | if (!crtcs) |
2144 | return best_score; | |
2145 | ||
2146 | my_score = 1; | |
2147 | if (connector->status == connector_status_connected) | |
2148 | my_score++; | |
0b4c0f3f | 2149 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 2150 | my_score++; |
0b4c0f3f | 2151 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
2152 | my_score++; |
2153 | ||
2154 | connector_funcs = connector->helper_private; | |
c61b93fe BB |
2155 | |
2156 | /* | |
2157 | * If the DRM device implements atomic hooks and ->best_encoder() is | |
2158 | * NULL we fallback to the default drm_atomic_helper_best_encoder() | |
2159 | * helper. | |
2160 | */ | |
a743d758 | 2161 | if (drm_drv_uses_atomic_modeset(fb_helper->dev) && |
c61b93fe BB |
2162 | !connector_funcs->best_encoder) |
2163 | encoder = drm_atomic_helper_best_encoder(connector); | |
2164 | else | |
2165 | encoder = connector_funcs->best_encoder(connector); | |
2166 | ||
38651674 DA |
2167 | if (!encoder) |
2168 | goto out; | |
2169 | ||
4b4f99f5 TR |
2170 | /* |
2171 | * select a crtc for this connector and then attempt to configure | |
2172 | * remaining connectors | |
2173 | */ | |
8be48d92 DA |
2174 | for (c = 0; c < fb_helper->crtc_count; c++) { |
2175 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 2176 | |
96081cdf | 2177 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 2178 | continue; |
38651674 DA |
2179 | |
2180 | for (o = 0; o < n; o++) | |
2181 | if (best_crtcs[o] == crtc) | |
2182 | break; | |
2183 | ||
2184 | if (o < n) { | |
1d42bbc8 DA |
2185 | /* ignore cloning unless only a single crtc */ |
2186 | if (fb_helper->crtc_count > 1) | |
2187 | continue; | |
2188 | ||
2189 | if (!drm_mode_equal(modes[o], modes[n])) | |
2190 | continue; | |
38651674 DA |
2191 | } |
2192 | ||
2193 | crtcs[n] = crtc; | |
8be48d92 DA |
2194 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
2195 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
2196 | width, height); |
2197 | if (score > best_score) { | |
38651674 DA |
2198 | best_score = score; |
2199 | memcpy(best_crtcs, crtcs, | |
255f0e7c | 2200 | fb_helper->connector_count * |
8be48d92 | 2201 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 2202 | } |
38651674 DA |
2203 | } |
2204 | out: | |
2205 | kfree(crtcs); | |
2206 | return best_score; | |
2207 | } | |
2208 | ||
64e94407 CW |
2209 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, |
2210 | u32 width, u32 height) | |
38651674 | 2211 | { |
8be48d92 DA |
2212 | struct drm_device *dev = fb_helper->dev; |
2213 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 2214 | struct drm_display_mode **modes; |
b0ee9e7f | 2215 | struct drm_fb_offset *offsets; |
38651674 | 2216 | bool *enabled; |
11e17a08 | 2217 | int i; |
38651674 DA |
2218 | |
2219 | DRM_DEBUG_KMS("\n"); | |
64e94407 CW |
2220 | if (drm_fb_helper_probe_connector_modes(fb_helper, width, height) == 0) |
2221 | DRM_DEBUG_KMS("No connectors reported connected with modes\n"); | |
38651674 | 2222 | |
966a6a13 CW |
2223 | /* prevent concurrent modification of connector_count by hotplug */ |
2224 | lockdep_assert_held(&fb_helper->dev->mode_config.mutex); | |
2225 | ||
383b2e57 | 2226 | crtcs = kcalloc(fb_helper->connector_count, |
8be48d92 | 2227 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
383b2e57 | 2228 | modes = kcalloc(fb_helper->connector_count, |
38651674 | 2229 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
383b2e57 | 2230 | offsets = kcalloc(fb_helper->connector_count, |
b0ee9e7f | 2231 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
383b2e57 | 2232 | enabled = kcalloc(fb_helper->connector_count, |
38651674 | 2233 | sizeof(bool), GFP_KERNEL); |
b0ee9e7f | 2234 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
2235 | DRM_ERROR("Memory allocation failed\n"); |
2236 | goto out; | |
2237 | } | |
2238 | ||
0b4c0f3f | 2239 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2240 | |
11e17a08 JB |
2241 | if (!(fb_helper->funcs->initial_config && |
2242 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2243 | offsets, |
11e17a08 | 2244 | enabled, width, height))) { |
383b2e57 ML |
2245 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
2246 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); | |
2247 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); | |
11e17a08 | 2248 | |
b0ee9e7f DA |
2249 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2250 | enabled, width, height) && | |
2251 | !drm_target_preferred(fb_helper, modes, offsets, | |
2252 | enabled, width, height)) | |
1d42bbc8 | 2253 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2254 | |
11e17a08 JB |
2255 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2256 | width, height); | |
38651674 | 2257 | |
11e17a08 JB |
2258 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2259 | } | |
8be48d92 DA |
2260 | |
2261 | /* need to set the modesets up here for use later */ | |
2262 | /* fill out the connector<->crtc mappings into the modesets */ | |
a2889606 VS |
2263 | for (i = 0; i < fb_helper->crtc_count; i++) |
2264 | drm_fb_helper_modeset_release(fb_helper, | |
2265 | &fb_helper->crtc_info[i].mode_set); | |
38651674 | 2266 | |
966a6a13 | 2267 | drm_fb_helper_for_each_connector(fb_helper, i) { |
38651674 | 2268 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2269 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2270 | struct drm_fb_offset *offset = &offsets[i]; |
a2889606 | 2271 | struct drm_mode_set *modeset = &fb_crtc->mode_set; |
38651674 | 2272 | |
8be48d92 | 2273 | if (mode && fb_crtc) { |
a2889606 VS |
2274 | struct drm_connector *connector = |
2275 | fb_helper->connector_info[i]->connector; | |
2276 | ||
b0ee9e7f DA |
2277 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2278 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
a2889606 | 2279 | |
8be48d92 | 2280 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2281 | fb_crtc->x = offset->x; |
2282 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2283 | modeset->mode = drm_mode_duplicate(dev, |
2284 | fb_crtc->desired_mode); | |
ad093607 | 2285 | drm_connector_get(connector); |
a2889606 | 2286 | modeset->connectors[modeset->num_connectors++] = connector; |
7e53f3a4 | 2287 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2288 | modeset->x = offset->x; |
2289 | modeset->y = offset->y; | |
7e53f3a4 DV |
2290 | } |
2291 | } | |
8c5eaca0 | 2292 | out: |
38651674 DA |
2293 | kfree(crtcs); |
2294 | kfree(modes); | |
b0ee9e7f | 2295 | kfree(offsets); |
38651674 DA |
2296 | kfree(enabled); |
2297 | } | |
2298 | ||
2299 | /** | |
207fd329 | 2300 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2301 | * @fb_helper: fb_helper device struct |
2302 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2303 | * |
d0ddc033 | 2304 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2305 | * At the moment, this is a cloned configuration across all heads with |
2306 | * a new framebuffer object as the backing store. | |
2307 | * | |
207fd329 DV |
2308 | * Note that this also registers the fbdev and so allows userspace to call into |
2309 | * the driver through the fbdev interfaces. | |
2310 | * | |
6806cdf9 DV |
2311 | * This function will call down into the &drm_fb_helper_funcs.fb_probe callback |
2312 | * to let the driver allocate and initialize the fbdev info structure and the | |
2313 | * drm framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
207fd329 DV |
2314 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default |
2315 | * values for the fbdev info structure. | |
2316 | * | |
40f8cf4b DV |
2317 | * HANG DEBUGGING: |
2318 | * | |
2319 | * When you have fbcon support built-in or already loaded, this function will do | |
2320 | * a full modeset to setup the fbdev console. Due to locking misdesign in the | |
2321 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding | |
2322 | * console_lock. Until console_unlock is called no dmesg lines will be sent out | |
2323 | * to consoles, not even serial console. This means when your driver crashes, | |
2324 | * you will see absolutely nothing else but a system stuck in this function, | |
2325 | * with no further output. Any kind of printk() you place within your own driver | |
2326 | * or in the drm core modeset code will also never show up. | |
2327 | * | |
2328 | * Standard debug practice is to run the fbcon setup without taking the | |
2329 | * console_lock as a hack, to be able to see backtraces and crashes on the | |
2330 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel | |
2331 | * cmdline option. | |
2332 | * | |
2333 | * The other option is to just disable fbdev emulation since very likely the | |
af509d38 L |
2334 | * first modeset from userspace will crash in the same way, and is even easier |
2335 | * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 | |
40f8cf4b DV |
2336 | * kernel cmdline option. |
2337 | * | |
38651674 DA |
2338 | * RETURNS: |
2339 | * Zero if everything went ok, nonzero otherwise. | |
2340 | */ | |
01934c2a | 2341 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2342 | { |
8be48d92 | 2343 | struct drm_device *dev = fb_helper->dev; |
966a6a13 | 2344 | struct fb_info *info; |
966a6a13 | 2345 | int ret; |
38651674 | 2346 | |
f64c5573 DV |
2347 | if (!drm_fbdev_emulation) |
2348 | return 0; | |
2349 | ||
53f1904b | 2350 | mutex_lock(&dev->mode_config.mutex); |
64e94407 CW |
2351 | drm_setup_crtcs(fb_helper, |
2352 | dev->mode_config.max_width, | |
2353 | dev->mode_config.max_height); | |
966a6a13 CW |
2354 | ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
2355 | mutex_unlock(&dev->mode_config.mutex); | |
2356 | if (ret) | |
2357 | return ret; | |
38651674 | 2358 | |
966a6a13 CW |
2359 | info = fb_helper->fbdev; |
2360 | info->var.pixclock = 0; | |
2361 | ret = register_framebuffer(info); | |
2362 | if (ret < 0) | |
2363 | return ret; | |
2364 | ||
2365 | dev_info(dev->dev, "fb%d: %s frame buffer device\n", | |
2366 | info->node, info->fix.id); | |
2367 | ||
a53ca635 | 2368 | mutex_lock(&kernel_fb_helper_lock); |
966a6a13 CW |
2369 | if (list_empty(&kernel_fb_helper_list)) |
2370 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
2371 | ||
2372 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
a53ca635 | 2373 | mutex_unlock(&kernel_fb_helper_lock); |
966a6a13 CW |
2374 | |
2375 | return 0; | |
38651674 | 2376 | } |
8be48d92 | 2377 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2378 | |
7394371d CW |
2379 | /** |
2380 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2381 | * probing all the outputs attached to the fb |
7394371d CW |
2382 | * @fb_helper: the drm_fb_helper |
2383 | * | |
7394371d | 2384 | * Scan the connectors attached to the fb_helper and try to put together a |
62cacc79 | 2385 | * setup after notification of a change in output configuration. |
7394371d | 2386 | * |
207fd329 DV |
2387 | * Called at runtime, takes the mode config locks to be able to check/change the |
2388 | * modeset configuration. Must be run from process context (which usually means | |
2389 | * either the output polling work or a work item launched from the driver's | |
2390 | * hotplug interrupt). | |
2391 | * | |
50c3dc97 | 2392 | * Note that drivers may call this even before calling |
af509d38 | 2393 | * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows |
50c3dc97 DV |
2394 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
2395 | * not miss any hotplug events. | |
207fd329 | 2396 | * |
7394371d CW |
2397 | * RETURNS: |
2398 | * 0 on success and a non-zero error code otherwise. | |
2399 | */ | |
2400 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2401 | { |
7394371d | 2402 | struct drm_device *dev = fb_helper->dev; |
5c4426a7 | 2403 | |
f64c5573 DV |
2404 | if (!drm_fbdev_emulation) |
2405 | return 0; | |
2406 | ||
64e94407 | 2407 | mutex_lock(&dev->mode_config.mutex); |
50c3dc97 | 2408 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2409 | fb_helper->delayed_hotplug = true; |
64e94407 | 2410 | mutex_unlock(&dev->mode_config.mutex); |
7394371d | 2411 | return 0; |
4abe3520 | 2412 | } |
eb1f8e4f | 2413 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2414 | |
64e94407 | 2415 | drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height); |
5c4426a7 | 2416 | |
64e94407 | 2417 | mutex_unlock(&dev->mode_config.mutex); |
89ced125 | 2418 | |
2180c3c7 DV |
2419 | drm_fb_helper_set_par(fb_helper->fbdev); |
2420 | ||
2421 | return 0; | |
5c4426a7 | 2422 | } |
eb1f8e4f | 2423 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2424 | |
6a108a14 | 2425 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2426 | * but the module doesn't depend on any fb console symbols. At least |
2427 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2428 | */ | |
70412cfa | 2429 | int __init drm_fb_helper_modinit(void) |
3ce05168 | 2430 | { |
70412cfa | 2431 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
2432 | const char *name = "fbcon"; |
2433 | struct module *fbcon; | |
2434 | ||
2435 | mutex_lock(&module_mutex); | |
2436 | fbcon = find_module(name); | |
2437 | mutex_unlock(&module_mutex); | |
2438 | ||
2439 | if (!fbcon) | |
2440 | request_module_nowait(name); | |
70412cfa | 2441 | #endif |
3ce05168 DF |
2442 | return 0; |
2443 | } | |
70412cfa | 2444 | EXPORT_SYMBOL(drm_fb_helper_modinit); |