Commit | Line | Data |
---|---|---|
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 | ||
af2405af TR |
112 | static 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 | ||
e9827d8e TR |
122 | lockdep_assert_held(&fb_helper->lock); |
123 | lockdep_assert_held(&fb_helper->dev->mode_config.mutex); | |
50021ff1 TR |
124 | |
125 | count = fb_helper->connector_count + 1; | |
126 | ||
127 | if (count > fb_helper->connector_info_alloc_count) { | |
128 | size_t size = count * sizeof(fb_conn); | |
129 | ||
130 | temp = krealloc(fb_helper->connector_info, size, GFP_KERNEL); | |
39b8b2ed TR |
131 | if (!temp) |
132 | return -ENOMEM; | |
133 | ||
50021ff1 | 134 | fb_helper->connector_info_alloc_count = count; |
39b8b2ed TR |
135 | fb_helper->connector_info = temp; |
136 | } | |
137 | ||
50021ff1 TR |
138 | fb_conn = kzalloc(sizeof(*fb_conn), GFP_KERNEL); |
139 | if (!fb_conn) | |
39b8b2ed TR |
140 | return -ENOMEM; |
141 | ||
142 | drm_connector_get(connector); | |
50021ff1 TR |
143 | fb_conn->connector = connector; |
144 | fb_helper->connector_info[fb_helper->connector_count++] = fb_conn; | |
af2405af | 145 | |
39b8b2ed TR |
146 | return 0; |
147 | } | |
af2405af TR |
148 | |
149 | int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, | |
150 | struct drm_connector *connector) | |
151 | { | |
152 | int err; | |
153 | ||
e9827d8e | 154 | mutex_lock(&fb_helper->lock); |
af2405af TR |
155 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
156 | ||
157 | err = __drm_fb_helper_add_one_connector(fb_helper, connector); | |
158 | ||
159 | mutex_unlock(&fb_helper->dev->mode_config.mutex); | |
e9827d8e | 160 | mutex_unlock(&fb_helper->lock); |
af2405af TR |
161 | |
162 | return err; | |
163 | } | |
39b8b2ed TR |
164 | EXPORT_SYMBOL(drm_fb_helper_add_one_connector); |
165 | ||
207fd329 DV |
166 | /** |
167 | * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev | |
168 | * emulation helper | |
169 | * @fb_helper: fbdev initialized with drm_fb_helper_init | |
170 | * | |
171 | * This functions adds all the available connectors for use with the given | |
172 | * fb_helper. This is a separate step to allow drivers to freely assign | |
173 | * connectors to the fbdev, e.g. if some are reserved for special purposes or | |
174 | * not adequate to be used for the fbcon. | |
175 | * | |
169faeca DV |
176 | * This function is protected against concurrent connector hotadds/removals |
177 | * using drm_fb_helper_add_one_connector() and | |
178 | * drm_fb_helper_remove_one_connector(). | |
207fd329 | 179 | */ |
0b4c0f3f | 180 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) |
d50ba256 | 181 | { |
0b4c0f3f DA |
182 | struct drm_device *dev = fb_helper->dev; |
183 | struct drm_connector *connector; | |
c36a3254 DV |
184 | struct drm_connector_list_iter conn_iter; |
185 | int i, ret = 0; | |
d50ba256 | 186 | |
f64c5573 DV |
187 | if (!drm_fbdev_emulation) |
188 | return 0; | |
189 | ||
e9827d8e | 190 | mutex_lock(&fb_helper->lock); |
169faeca | 191 | mutex_lock(&dev->mode_config.mutex); |
b982dab1 | 192 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 193 | drm_for_each_connector_iter(connector, &conn_iter) { |
af2405af | 194 | ret = __drm_fb_helper_add_one_connector(fb_helper, connector); |
15fce29d | 195 | if (ret) |
0b4c0f3f | 196 | goto fail; |
0b4c0f3f | 197 | } |
c36a3254 DV |
198 | goto out; |
199 | ||
0b4c0f3f | 200 | fail: |
966a6a13 | 201 | drm_fb_helper_for_each_connector(fb_helper, i) { |
7dfcb36a VS |
202 | struct drm_fb_helper_connector *fb_helper_connector = |
203 | fb_helper->connector_info[i]; | |
204 | ||
ad093607 | 205 | drm_connector_put(fb_helper_connector->connector); |
7dfcb36a VS |
206 | |
207 | kfree(fb_helper_connector); | |
0b4c0f3f DA |
208 | fb_helper->connector_info[i] = NULL; |
209 | } | |
210 | fb_helper->connector_count = 0; | |
c36a3254 | 211 | out: |
b982dab1 | 212 | drm_connector_list_iter_end(&conn_iter); |
169faeca | 213 | mutex_unlock(&dev->mode_config.mutex); |
e9827d8e | 214 | mutex_unlock(&fb_helper->lock); |
169faeca | 215 | |
15fce29d | 216 | return ret; |
d50ba256 | 217 | } |
0b4c0f3f | 218 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 219 | |
af2405af TR |
220 | static int __drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, |
221 | struct drm_connector *connector) | |
65c2a89c DA |
222 | { |
223 | struct drm_fb_helper_connector *fb_helper_connector; | |
224 | int i, j; | |
225 | ||
f64c5573 DV |
226 | if (!drm_fbdev_emulation) |
227 | return 0; | |
228 | ||
e9827d8e | 229 | lockdep_assert_held(&fb_helper->lock); |
65c2a89c | 230 | |
e9827d8e | 231 | drm_fb_helper_for_each_connector(fb_helper, i) { |
65c2a89c DA |
232 | if (fb_helper->connector_info[i]->connector == connector) |
233 | break; | |
234 | } | |
235 | ||
236 | if (i == fb_helper->connector_count) | |
237 | return -EINVAL; | |
238 | fb_helper_connector = fb_helper->connector_info[i]; | |
ad093607 | 239 | drm_connector_put(fb_helper_connector->connector); |
65c2a89c | 240 | |
4b4f99f5 | 241 | for (j = i + 1; j < fb_helper->connector_count; j++) |
65c2a89c | 242 | fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; |
4b4f99f5 | 243 | |
65c2a89c DA |
244 | fb_helper->connector_count--; |
245 | kfree(fb_helper_connector); | |
2148f18f | 246 | |
65c2a89c DA |
247 | return 0; |
248 | } | |
af2405af TR |
249 | |
250 | int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, | |
251 | struct drm_connector *connector) | |
252 | { | |
253 | int err; | |
254 | ||
e9827d8e | 255 | mutex_lock(&fb_helper->lock); |
af2405af TR |
256 | mutex_lock(&fb_helper->dev->mode_config.mutex); |
257 | ||
258 | err = __drm_fb_helper_remove_one_connector(fb_helper, connector); | |
259 | ||
260 | mutex_unlock(&fb_helper->dev->mode_config.mutex); | |
e9827d8e | 261 | mutex_unlock(&fb_helper->lock); |
af2405af TR |
262 | |
263 | return err; | |
264 | } | |
65c2a89c DA |
265 | EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); |
266 | ||
99231028 JW |
267 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
268 | { | |
269 | uint16_t *r_base, *g_base, *b_base; | |
270 | int i; | |
271 | ||
04c0c569 VS |
272 | if (helper->funcs->gamma_get == NULL) |
273 | return; | |
274 | ||
99231028 JW |
275 | r_base = crtc->gamma_store; |
276 | g_base = r_base + crtc->gamma_size; | |
277 | b_base = g_base + crtc->gamma_size; | |
278 | ||
279 | for (i = 0; i < crtc->gamma_size; i++) | |
280 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
281 | } | |
282 | ||
283 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
284 | { | |
285 | uint16_t *r_base, *g_base, *b_base; | |
286 | ||
ebe0f244 LP |
287 | if (crtc->funcs->gamma_set == NULL) |
288 | return; | |
289 | ||
99231028 JW |
290 | r_base = crtc->gamma_store; |
291 | g_base = r_base + crtc->gamma_size; | |
292 | b_base = g_base + crtc->gamma_size; | |
293 | ||
6d124ff8 DV |
294 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, |
295 | crtc->gamma_size, NULL); | |
99231028 JW |
296 | } |
297 | ||
207fd329 | 298 | /** |
6806cdf9 | 299 | * drm_fb_helper_debug_enter - implementation for &fb_ops.fb_debug_enter |
207fd329 DV |
300 | * @info: fbdev registered by the helper |
301 | */ | |
1a7aba7f JB |
302 | int drm_fb_helper_debug_enter(struct fb_info *info) |
303 | { | |
304 | struct drm_fb_helper *helper = info->par; | |
be26a66d | 305 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
306 | int i; |
307 | ||
1a7aba7f JB |
308 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { |
309 | for (i = 0; i < helper->crtc_count; i++) { | |
310 | struct drm_mode_set *mode_set = | |
311 | &helper->crtc_info[i].mode_set; | |
312 | ||
313 | if (!mode_set->crtc->enabled) | |
314 | continue; | |
315 | ||
316 | funcs = mode_set->crtc->helper_private; | |
1b99b724 SC |
317 | if (funcs->mode_set_base_atomic == NULL) |
318 | continue; | |
319 | ||
9c79e0b1 DV |
320 | if (drm_drv_uses_atomic_modeset(mode_set->crtc->dev)) |
321 | continue; | |
322 | ||
99231028 | 323 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
324 | funcs->mode_set_base_atomic(mode_set->crtc, |
325 | mode_set->fb, | |
326 | mode_set->x, | |
413d45d3 | 327 | mode_set->y, |
21c74a8e | 328 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
329 | } |
330 | } | |
331 | ||
332 | return 0; | |
333 | } | |
334 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
335 | ||
207fd329 | 336 | /** |
6806cdf9 | 337 | * drm_fb_helper_debug_leave - implementation for &fb_ops.fb_debug_leave |
207fd329 DV |
338 | * @info: fbdev registered by the helper |
339 | */ | |
1a7aba7f JB |
340 | int drm_fb_helper_debug_leave(struct fb_info *info) |
341 | { | |
342 | struct drm_fb_helper *helper = info->par; | |
343 | struct drm_crtc *crtc; | |
be26a66d | 344 | const struct drm_crtc_helper_funcs *funcs; |
1a7aba7f JB |
345 | struct drm_framebuffer *fb; |
346 | int i; | |
347 | ||
348 | for (i = 0; i < helper->crtc_count; i++) { | |
349 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
4b4f99f5 | 350 | |
1a7aba7f | 351 | crtc = mode_set->crtc; |
7114d2e2 ML |
352 | if (drm_drv_uses_atomic_modeset(crtc->dev)) |
353 | continue; | |
354 | ||
1a7aba7f | 355 | funcs = crtc->helper_private; |
7114d2e2 | 356 | fb = crtc->primary->fb; |
1a7aba7f JB |
357 | |
358 | if (!crtc->enabled) | |
359 | continue; | |
360 | ||
361 | if (!fb) { | |
362 | DRM_ERROR("no fb to restore??\n"); | |
363 | continue; | |
364 | } | |
365 | ||
1b99b724 SC |
366 | if (funcs->mode_set_base_atomic == NULL) |
367 | continue; | |
368 | ||
99231028 | 369 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 370 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 371 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
372 | } |
373 | ||
374 | return 0; | |
375 | } | |
376 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
377 | ||
bbb1e524 RC |
378 | static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper) |
379 | { | |
380 | struct drm_device *dev = fb_helper->dev; | |
381 | struct drm_plane *plane; | |
382 | struct drm_atomic_state *state; | |
383 | int i, ret; | |
4b4f99f5 | 384 | unsigned int plane_mask; |
1d0c6410 DV |
385 | struct drm_modeset_acquire_ctx ctx; |
386 | ||
387 | drm_modeset_acquire_init(&ctx, 0); | |
bbb1e524 RC |
388 | |
389 | state = drm_atomic_state_alloc(dev); | |
1d0c6410 DV |
390 | if (!state) { |
391 | ret = -ENOMEM; | |
392 | goto out_ctx; | |
393 | } | |
bbb1e524 | 394 | |
1d0c6410 | 395 | state->acquire_ctx = &ctx; |
bbb1e524 | 396 | retry: |
f72c6b33 | 397 | plane_mask = 0; |
bbb1e524 RC |
398 | drm_for_each_plane(plane, dev) { |
399 | struct drm_plane_state *plane_state; | |
400 | ||
401 | plane_state = drm_atomic_get_plane_state(state, plane); | |
402 | if (IS_ERR(plane_state)) { | |
403 | ret = PTR_ERR(plane_state); | |
1d0c6410 | 404 | goto out_state; |
bbb1e524 RC |
405 | } |
406 | ||
c2c446ad | 407 | plane_state->rotation = DRM_MODE_ROTATE_0; |
bbb1e524 | 408 | |
f72c6b33 ML |
409 | plane->old_fb = plane->fb; |
410 | plane_mask |= 1 << drm_plane_index(plane); | |
411 | ||
bbb1e524 RC |
412 | /* disable non-primary: */ |
413 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | |
414 | continue; | |
415 | ||
416 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); | |
417 | if (ret != 0) | |
1d0c6410 | 418 | goto out_state; |
bbb1e524 RC |
419 | } |
420 | ||
4b4f99f5 | 421 | for (i = 0; i < fb_helper->crtc_count; i++) { |
bbb1e524 RC |
422 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; |
423 | ||
424 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
425 | if (ret != 0) | |
1d0c6410 | 426 | goto out_state; |
bbb1e524 RC |
427 | } |
428 | ||
429 | ret = drm_atomic_commit(state); | |
bbb1e524 | 430 | |
1d0c6410 | 431 | out_state: |
f72c6b33 | 432 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
94284037 | 433 | |
bbb1e524 RC |
434 | if (ret == -EDEADLK) |
435 | goto backoff; | |
436 | ||
0853695c | 437 | drm_atomic_state_put(state); |
1d0c6410 DV |
438 | out_ctx: |
439 | drm_modeset_drop_locks(&ctx); | |
440 | drm_modeset_acquire_fini(&ctx); | |
441 | ||
bbb1e524 RC |
442 | return ret; |
443 | ||
444 | backoff: | |
445 | drm_atomic_state_clear(state); | |
1d0c6410 | 446 | drm_modeset_backoff(&ctx); |
bbb1e524 RC |
447 | |
448 | goto retry; | |
449 | } | |
450 | ||
7128645d | 451 | static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper) |
e8e7a2b8 | 452 | { |
3858bc5d VS |
453 | struct drm_device *dev = fb_helper->dev; |
454 | struct drm_plane *plane; | |
1d0c6410 | 455 | int i, ret = 0; |
3858bc5d | 456 | |
1d0c6410 | 457 | drm_modeset_lock_all(fb_helper->dev); |
6295d607 | 458 | drm_for_each_plane(plane, dev) { |
e27dde3e MR |
459 | if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
460 | drm_plane_force_disable(plane); | |
6aed8ec3 | 461 | |
6686df8c | 462 | if (plane->rotation_property) |
d138dd3c VS |
463 | drm_mode_plane_set_obj_prop(plane, |
464 | plane->rotation_property, | |
c2c446ad | 465 | DRM_MODE_ROTATE_0); |
9783de20 SJ |
466 | } |
467 | ||
e8e7a2b8 DA |
468 | for (i = 0; i < fb_helper->crtc_count; i++) { |
469 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
3858bc5d | 470 | struct drm_crtc *crtc = mode_set->crtc; |
3858bc5d | 471 | |
03f9abb2 AD |
472 | if (crtc->funcs->cursor_set2) { |
473 | ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); | |
474 | if (ret) | |
1d0c6410 | 475 | goto out; |
03f9abb2 | 476 | } else if (crtc->funcs->cursor_set) { |
3858bc5d VS |
477 | ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
478 | if (ret) | |
1d0c6410 | 479 | goto out; |
3858bc5d VS |
480 | } |
481 | ||
2d13b679 | 482 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 | 483 | if (ret) |
1d0c6410 | 484 | goto out; |
e8e7a2b8 | 485 | } |
1d0c6410 DV |
486 | out: |
487 | drm_modeset_unlock_all(fb_helper->dev); | |
b7bdf0a8 | 488 | |
1d0c6410 | 489 | return ret; |
e8e7a2b8 | 490 | } |
5ea1f752 | 491 | |
7128645d DV |
492 | static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
493 | { | |
494 | struct drm_device *dev = fb_helper->dev; | |
495 | ||
7128645d DV |
496 | if (drm_drv_uses_atomic_modeset(dev)) |
497 | return restore_fbdev_mode_atomic(fb_helper); | |
498 | else | |
499 | return restore_fbdev_mode_legacy(fb_helper); | |
500 | } | |
501 | ||
5ea1f752 RC |
502 | /** |
503 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration | |
504 | * @fb_helper: fbcon to restore | |
505 | * | |
6806cdf9 | 506 | * This should be called from driver's drm &drm_driver.lastclose callback |
5ea1f752 RC |
507 | * when implementing an fbcon on top of kms using this helper. This ensures that |
508 | * the user isn't greeted with a black screen when e.g. X dies. | |
b7bdf0a8 DV |
509 | * |
510 | * RETURNS: | |
511 | * Zero if everything went ok, negative error code otherwise. | |
5ea1f752 | 512 | */ |
b7bdf0a8 | 513 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
5ea1f752 | 514 | { |
b7bdf0a8 DV |
515 | bool do_delayed; |
516 | int ret; | |
e2809c7d | 517 | |
f64c5573 DV |
518 | if (!drm_fbdev_emulation) |
519 | return -ENODEV; | |
520 | ||
e9827d8e | 521 | mutex_lock(&fb_helper->lock); |
5ea1f752 | 522 | ret = restore_fbdev_mode(fb_helper); |
e2809c7d DA |
523 | |
524 | do_delayed = fb_helper->delayed_hotplug; | |
525 | if (do_delayed) | |
526 | fb_helper->delayed_hotplug = false; | |
e9827d8e | 527 | mutex_unlock(&fb_helper->lock); |
e2809c7d DA |
528 | |
529 | if (do_delayed) | |
530 | drm_fb_helper_hotplug_event(fb_helper); | |
e9827d8e | 531 | |
5ea1f752 RC |
532 | return ret; |
533 | } | |
534 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); | |
e8e7a2b8 | 535 | |
2c4124fd GU |
536 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
537 | { | |
538 | struct drm_device *dev = fb_helper->dev; | |
539 | struct drm_crtc *crtc; | |
540 | int bound = 0, crtcs_bound = 0; | |
541 | ||
4b4f99f5 TR |
542 | /* |
543 | * Sometimes user space wants everything disabled, so don't steal the | |
544 | * display if there's a master. | |
545 | */ | |
f17b3ea3 | 546 | if (READ_ONCE(dev->master)) |
2c4124fd GU |
547 | return false; |
548 | ||
549 | drm_for_each_crtc(crtc, dev) { | |
bdac4a05 | 550 | drm_modeset_lock(&crtc->mutex, NULL); |
2c4124fd GU |
551 | if (crtc->primary->fb) |
552 | crtcs_bound++; | |
553 | if (crtc->primary->fb == fb_helper->fb) | |
554 | bound++; | |
bdac4a05 | 555 | drm_modeset_unlock(&crtc->mutex); |
2c4124fd GU |
556 | } |
557 | ||
558 | if (bound < crtcs_bound) | |
559 | return false; | |
560 | ||
561 | return true; | |
562 | } | |
563 | ||
564 | #ifdef CONFIG_MAGIC_SYSRQ | |
d21bf469 DV |
565 | /* |
566 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
567 | * and panic handling. | |
568 | */ | |
78b9c353 | 569 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 570 | { |
785b93ef DA |
571 | bool ret, error = false; |
572 | struct drm_fb_helper *helper; | |
573 | ||
574 | if (list_empty(&kernel_fb_helper_list)) | |
575 | return false; | |
576 | ||
577 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
b77f0765 TR |
578 | struct drm_device *dev = helper->dev; |
579 | ||
580 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) | |
581 | continue; | |
582 | ||
e9827d8e | 583 | mutex_lock(&helper->lock); |
3d9e35a9 | 584 | ret = restore_fbdev_mode(helper); |
e8e7a2b8 DA |
585 | if (ret) |
586 | error = true; | |
e9827d8e | 587 | mutex_unlock(&helper->lock); |
785b93ef DA |
588 | } |
589 | return error; | |
590 | } | |
591 | ||
785b93ef DA |
592 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
593 | { | |
d21bf469 | 594 | bool ret; |
4b4f99f5 | 595 | |
d21bf469 DV |
596 | ret = drm_fb_helper_force_kernel_mode(); |
597 | if (ret == true) | |
598 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
599 | } |
600 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
601 | ||
1495cc9d | 602 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
603 | { |
604 | schedule_work(&drm_fb_helper_restore_work); | |
605 | } | |
606 | ||
607 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
608 | .handler = drm_fb_helper_sysrq, | |
609 | .help_msg = "force-fb(V)", | |
610 | .action_msg = "Restore framebuffer console", | |
611 | }; | |
b8c40d62 RD |
612 | #else |
613 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 614 | #endif |
785b93ef | 615 | |
3a8148c5 | 616 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
617 | { |
618 | struct drm_fb_helper *fb_helper = info->par; | |
619 | struct drm_device *dev = fb_helper->dev; | |
620 | struct drm_crtc *crtc; | |
023eb571 | 621 | struct drm_connector *connector; |
023eb571 | 622 | int i, j; |
785b93ef DA |
623 | |
624 | /* | |
3a8148c5 | 625 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 626 | */ |
e9827d8e | 627 | mutex_lock(&fb_helper->lock); |
20c60c35 | 628 | if (!drm_fb_helper_is_bound(fb_helper)) { |
e9827d8e | 629 | mutex_unlock(&fb_helper->lock); |
20c60c35 DV |
630 | return; |
631 | } | |
632 | ||
bdac4a05 | 633 | drm_modeset_lock_all(dev); |
e87b2c42 | 634 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 635 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 636 | |
8be48d92 DA |
637 | if (!crtc->enabled) |
638 | continue; | |
639 | ||
3a8148c5 | 640 | /* Walk the connectors & encoders on this fb turning them on/off */ |
966a6a13 | 641 | drm_fb_helper_for_each_connector(fb_helper, j) { |
023eb571 | 642 | connector = fb_helper->connector_info[j]->connector; |
e04190e0 | 643 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 644 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 645 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 646 | } |
785b93ef | 647 | } |
84849903 | 648 | drm_modeset_unlock_all(dev); |
e9827d8e | 649 | mutex_unlock(&fb_helper->lock); |
785b93ef DA |
650 | } |
651 | ||
207fd329 | 652 | /** |
6806cdf9 | 653 | * drm_fb_helper_blank - implementation for &fb_ops.fb_blank |
207fd329 DV |
654 | * @blank: desired blanking state |
655 | * @info: fbdev registered by the helper | |
656 | */ | |
785b93ef DA |
657 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
658 | { | |
c50bfd08 DV |
659 | if (oops_in_progress) |
660 | return -EBUSY; | |
661 | ||
785b93ef | 662 | switch (blank) { |
731b5a15 | 663 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 664 | case FB_BLANK_UNBLANK: |
3a8148c5 | 665 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 666 | break; |
731b5a15 | 667 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 668 | case FB_BLANK_NORMAL: |
3a8148c5 | 669 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 670 | break; |
731b5a15 | 671 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 672 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 673 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 674 | break; |
731b5a15 | 675 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 676 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 677 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 678 | break; |
731b5a15 | 679 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 680 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 681 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
682 | break; |
683 | } | |
684 | return 0; | |
685 | } | |
686 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
687 | ||
a2889606 VS |
688 | static void drm_fb_helper_modeset_release(struct drm_fb_helper *helper, |
689 | struct drm_mode_set *modeset) | |
690 | { | |
691 | int i; | |
692 | ||
693 | for (i = 0; i < modeset->num_connectors; i++) { | |
ad093607 | 694 | drm_connector_put(modeset->connectors[i]); |
a2889606 VS |
695 | modeset->connectors[i] = NULL; |
696 | } | |
697 | modeset->num_connectors = 0; | |
698 | ||
699 | drm_mode_destroy(helper->dev, modeset->mode); | |
700 | modeset->mode = NULL; | |
701 | ||
702 | /* FIXME should hold a ref? */ | |
703 | modeset->fb = NULL; | |
704 | } | |
705 | ||
785b93ef DA |
706 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) |
707 | { | |
708 | int i; | |
709 | ||
6e86d58b | 710 | for (i = 0; i < helper->connector_count; i++) { |
ad093607 | 711 | drm_connector_put(helper->connector_info[i]->connector); |
0b4c0f3f | 712 | kfree(helper->connector_info[i]); |
6e86d58b | 713 | } |
0b4c0f3f | 714 | kfree(helper->connector_info); |
a2889606 | 715 | |
a1b7736d | 716 | for (i = 0; i < helper->crtc_count; i++) { |
a2889606 VS |
717 | struct drm_mode_set *modeset = &helper->crtc_info[i].mode_set; |
718 | ||
719 | drm_fb_helper_modeset_release(helper, modeset); | |
720 | kfree(modeset->connectors); | |
a1b7736d | 721 | } |
785b93ef DA |
722 | kfree(helper->crtc_info); |
723 | } | |
724 | ||
cfe63423 NT |
725 | static void drm_fb_helper_resume_worker(struct work_struct *work) |
726 | { | |
727 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
728 | resume_work); | |
729 | ||
730 | console_lock(); | |
731 | fb_set_suspend(helper->fbdev, 0); | |
732 | console_unlock(); | |
733 | } | |
734 | ||
eaa434de NT |
735 | static void drm_fb_helper_dirty_work(struct work_struct *work) |
736 | { | |
737 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, | |
738 | dirty_work); | |
739 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
740 | struct drm_clip_rect clip_copy; | |
741 | unsigned long flags; | |
742 | ||
743 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
744 | clip_copy = *clip; | |
745 | clip->x1 = clip->y1 = ~0; | |
746 | clip->x2 = clip->y2 = 0; | |
747 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
748 | ||
87d3b658 TI |
749 | /* call dirty callback only when it has been really touched */ |
750 | if (clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2) | |
751 | helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); | |
eaa434de NT |
752 | } |
753 | ||
10a23102 TR |
754 | /** |
755 | * drm_fb_helper_prepare - setup a drm_fb_helper structure | |
756 | * @dev: DRM device | |
757 | * @helper: driver-allocated fbdev helper structure to set up | |
758 | * @funcs: pointer to structure of functions associate with this helper | |
759 | * | |
760 | * Sets up the bare minimum to make the framebuffer helper usable. This is | |
761 | * useful to implement race-free initialization of the polling helpers. | |
762 | */ | |
763 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, | |
764 | const struct drm_fb_helper_funcs *funcs) | |
765 | { | |
766 | INIT_LIST_HEAD(&helper->kernel_fb_list); | |
eaa434de | 767 | spin_lock_init(&helper->dirty_lock); |
cfe63423 | 768 | INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker); |
eaa434de NT |
769 | INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work); |
770 | helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0; | |
e9827d8e | 771 | mutex_init(&helper->lock); |
10a23102 TR |
772 | helper->funcs = funcs; |
773 | helper->dev = dev; | |
774 | } | |
775 | EXPORT_SYMBOL(drm_fb_helper_prepare); | |
776 | ||
207fd329 | 777 | /** |
ed84e254 | 778 | * drm_fb_helper_init - initialize a &struct drm_fb_helper |
207fd329 DV |
779 | * @dev: drm device |
780 | * @fb_helper: driver-allocated fbdev helper structure to initialize | |
207fd329 DV |
781 | * @max_conn_count: max connector count |
782 | * | |
783 | * This allocates the structures for the fbdev helper with the given limits. | |
784 | * Note that this won't yet touch the hardware (through the driver interfaces) | |
785 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() | |
786 | * to allow driver writes more control over the exact init sequence. | |
787 | * | |
10a23102 | 788 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
207fd329 DV |
789 | * |
790 | * RETURNS: | |
791 | * Zero if everything went ok, nonzero otherwise. | |
792 | */ | |
4abe3520 DA |
793 | int drm_fb_helper_init(struct drm_device *dev, |
794 | struct drm_fb_helper *fb_helper, | |
e4563f6b | 795 | int max_conn_count) |
785b93ef | 796 | { |
785b93ef | 797 | struct drm_crtc *crtc; |
e4563f6b | 798 | struct drm_mode_config *config = &dev->mode_config; |
785b93ef DA |
799 | int i; |
800 | ||
f64c5573 DV |
801 | if (!drm_fbdev_emulation) |
802 | return 0; | |
803 | ||
04cfe97e XL |
804 | if (!max_conn_count) |
805 | return -EINVAL; | |
806 | ||
e4563f6b | 807 | fb_helper->crtc_info = kcalloc(config->num_crtc, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); |
4abe3520 | 808 | if (!fb_helper->crtc_info) |
785b93ef DA |
809 | return -ENOMEM; |
810 | ||
e4563f6b | 811 | fb_helper->crtc_count = config->num_crtc; |
4abe3520 DA |
812 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); |
813 | if (!fb_helper->connector_info) { | |
814 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
815 | return -ENOMEM; |
816 | } | |
65c2a89c | 817 | fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; |
4abe3520 | 818 | fb_helper->connector_count = 0; |
785b93ef | 819 | |
e4563f6b | 820 | for (i = 0; i < fb_helper->crtc_count; i++) { |
4abe3520 | 821 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
822 | kcalloc(max_conn_count, |
823 | sizeof(struct drm_connector *), | |
824 | GFP_KERNEL); | |
825 | ||
4a1b0714 | 826 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 827 | goto out_free; |
4abe3520 | 828 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
829 | } |
830 | ||
831 | i = 0; | |
6295d607 | 832 | drm_for_each_crtc(crtc, dev) { |
4abe3520 | 833 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
834 | i++; |
835 | } | |
e9ad3181 | 836 | |
785b93ef DA |
837 | return 0; |
838 | out_free: | |
4abe3520 | 839 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
840 | return -ENOMEM; |
841 | } | |
4abe3520 DA |
842 | EXPORT_SYMBOL(drm_fb_helper_init); |
843 | ||
b8017d6c AT |
844 | /** |
845 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members | |
846 | * @fb_helper: driver-allocated fbdev helper | |
847 | * | |
848 | * A helper to alloc fb_info and the members cmap and apertures. Called | |
da7bdda2 DV |
849 | * by the driver within the fb_probe fb_helper callback function. Drivers do not |
850 | * need to release the allocated fb_info structure themselves, this is | |
851 | * automatically done when calling drm_fb_helper_fini(). | |
b8017d6c AT |
852 | * |
853 | * RETURNS: | |
854 | * fb_info pointer if things went okay, pointer containing error code | |
855 | * otherwise | |
856 | */ | |
857 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) | |
858 | { | |
859 | struct device *dev = fb_helper->dev->dev; | |
860 | struct fb_info *info; | |
861 | int ret; | |
862 | ||
863 | info = framebuffer_alloc(0, dev); | |
864 | if (!info) | |
865 | return ERR_PTR(-ENOMEM); | |
866 | ||
867 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
868 | if (ret) | |
869 | goto err_release; | |
870 | ||
871 | info->apertures = alloc_apertures(1); | |
872 | if (!info->apertures) { | |
873 | ret = -ENOMEM; | |
874 | goto err_free_cmap; | |
875 | } | |
876 | ||
877 | fb_helper->fbdev = info; | |
878 | ||
879 | return info; | |
880 | ||
881 | err_free_cmap: | |
882 | fb_dealloc_cmap(&info->cmap); | |
883 | err_release: | |
884 | framebuffer_release(info); | |
885 | return ERR_PTR(ret); | |
886 | } | |
887 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); | |
888 | ||
889 | /** | |
890 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device | |
891 | * @fb_helper: driver-allocated fbdev helper | |
892 | * | |
893 | * A wrapper around unregister_framebuffer, to release the fb_info | |
ed84e254 DV |
894 | * framebuffer device. This must be called before releasing all resources for |
895 | * @fb_helper by calling drm_fb_helper_fini(). | |
b8017d6c AT |
896 | */ |
897 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) | |
898 | { | |
899 | if (fb_helper && fb_helper->fbdev) | |
900 | unregister_framebuffer(fb_helper->fbdev); | |
901 | } | |
902 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); | |
903 | ||
ed84e254 DV |
904 | /** |
905 | * drm_fb_helper_fini - finialize a &struct drm_fb_helper | |
906 | * @fb_helper: driver-allocated fbdev helper | |
907 | * | |
908 | * This cleans up all remaining resources associated with @fb_helper. Must be | |
909 | * called after drm_fb_helper_unlink_fbi() was called. | |
910 | */ | |
4abe3520 DA |
911 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
912 | { | |
da7bdda2 DV |
913 | struct fb_info *info; |
914 | ||
915 | if (!drm_fbdev_emulation || !fb_helper) | |
f64c5573 DV |
916 | return; |
917 | ||
da7bdda2 DV |
918 | info = fb_helper->fbdev; |
919 | if (info) { | |
920 | if (info->cmap.len) | |
921 | fb_dealloc_cmap(&info->cmap); | |
922 | framebuffer_release(info); | |
923 | } | |
924 | fb_helper->fbdev = NULL; | |
925 | ||
24f76b2c | 926 | cancel_work_sync(&fb_helper->resume_work); |
f21b9a92 CW |
927 | cancel_work_sync(&fb_helper->dirty_work); |
928 | ||
a53ca635 | 929 | mutex_lock(&kernel_fb_helper_lock); |
4abe3520 DA |
930 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
931 | list_del(&fb_helper->kernel_fb_list); | |
4b4f99f5 | 932 | if (list_empty(&kernel_fb_helper_list)) |
4abe3520 | 933 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
4abe3520 | 934 | } |
a53ca635 | 935 | mutex_unlock(&kernel_fb_helper_lock); |
4abe3520 | 936 | |
e9827d8e | 937 | mutex_destroy(&fb_helper->lock); |
4abe3520 DA |
938 | drm_fb_helper_crtc_free(fb_helper); |
939 | ||
4abe3520 DA |
940 | } |
941 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 942 | |
47074ab7 AT |
943 | /** |
944 | * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer | |
945 | * @fb_helper: driver-allocated fbdev helper | |
946 | * | |
947 | * A wrapper around unlink_framebuffer implemented by fbdev core | |
948 | */ | |
949 | void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) | |
950 | { | |
951 | if (fb_helper && fb_helper->fbdev) | |
952 | unlink_framebuffer(fb_helper->fbdev); | |
953 | } | |
954 | EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); | |
955 | ||
eaa434de NT |
956 | static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y, |
957 | u32 width, u32 height) | |
958 | { | |
959 | struct drm_fb_helper *helper = info->par; | |
960 | struct drm_clip_rect *clip = &helper->dirty_clip; | |
961 | unsigned long flags; | |
962 | ||
963 | if (!helper->fb->funcs->dirty) | |
964 | return; | |
965 | ||
966 | spin_lock_irqsave(&helper->dirty_lock, flags); | |
967 | clip->x1 = min_t(u32, clip->x1, x); | |
968 | clip->y1 = min_t(u32, clip->y1, y); | |
969 | clip->x2 = max_t(u32, clip->x2, x + width); | |
970 | clip->y2 = max_t(u32, clip->y2, y + height); | |
971 | spin_unlock_irqrestore(&helper->dirty_lock, flags); | |
972 | ||
973 | schedule_work(&helper->dirty_work); | |
974 | } | |
975 | ||
976 | /** | |
977 | * drm_fb_helper_deferred_io() - fbdev deferred_io callback function | |
978 | * @info: fb_info struct pointer | |
979 | * @pagelist: list of dirty mmap framebuffer pages | |
980 | * | |
6806cdf9 | 981 | * This function is used as the &fb_deferred_io.deferred_io |
eaa434de NT |
982 | * callback function for flushing the fbdev mmap writes. |
983 | */ | |
984 | void drm_fb_helper_deferred_io(struct fb_info *info, | |
985 | struct list_head *pagelist) | |
986 | { | |
987 | unsigned long start, end, min, max; | |
988 | struct page *page; | |
989 | u32 y1, y2; | |
990 | ||
991 | min = ULONG_MAX; | |
992 | max = 0; | |
993 | list_for_each_entry(page, pagelist, lru) { | |
994 | start = page->index << PAGE_SHIFT; | |
995 | end = start + PAGE_SIZE - 1; | |
996 | min = min(min, start); | |
997 | max = max(max, end); | |
998 | } | |
999 | ||
1000 | if (min < max) { | |
1001 | y1 = min / info->fix.line_length; | |
1002 | y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length), | |
1003 | info->var.yres); | |
1004 | drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1); | |
1005 | } | |
1006 | } | |
1007 | EXPORT_SYMBOL(drm_fb_helper_deferred_io); | |
1008 | ||
cbb1a82e AT |
1009 | /** |
1010 | * drm_fb_helper_sys_read - wrapper around fb_sys_read | |
1011 | * @info: fb_info struct pointer | |
1012 | * @buf: userspace buffer to read from framebuffer memory | |
1013 | * @count: number of bytes to read from framebuffer memory | |
1014 | * @ppos: read offset within framebuffer memory | |
1015 | * | |
1016 | * A wrapper around fb_sys_read implemented by fbdev core | |
1017 | */ | |
1018 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, | |
1019 | size_t count, loff_t *ppos) | |
1020 | { | |
1021 | return fb_sys_read(info, buf, count, ppos); | |
1022 | } | |
1023 | EXPORT_SYMBOL(drm_fb_helper_sys_read); | |
1024 | ||
1025 | /** | |
1026 | * drm_fb_helper_sys_write - wrapper around fb_sys_write | |
1027 | * @info: fb_info struct pointer | |
1028 | * @buf: userspace buffer to write to framebuffer memory | |
1029 | * @count: number of bytes to write to framebuffer memory | |
1030 | * @ppos: write offset within framebuffer memory | |
1031 | * | |
1032 | * A wrapper around fb_sys_write implemented by fbdev core | |
1033 | */ | |
1034 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, | |
1035 | size_t count, loff_t *ppos) | |
1036 | { | |
eaa434de NT |
1037 | ssize_t ret; |
1038 | ||
1039 | ret = fb_sys_write(info, buf, count, ppos); | |
1040 | if (ret > 0) | |
1041 | drm_fb_helper_dirty(info, 0, 0, info->var.xres, | |
1042 | info->var.yres); | |
1043 | ||
1044 | return ret; | |
cbb1a82e AT |
1045 | } |
1046 | EXPORT_SYMBOL(drm_fb_helper_sys_write); | |
1047 | ||
742547b7 AT |
1048 | /** |
1049 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect | |
1050 | * @info: fbdev registered by the helper | |
1051 | * @rect: info about rectangle to fill | |
1052 | * | |
1053 | * A wrapper around sys_fillrect implemented by fbdev core | |
1054 | */ | |
1055 | void drm_fb_helper_sys_fillrect(struct fb_info *info, | |
1056 | const struct fb_fillrect *rect) | |
1057 | { | |
1058 | sys_fillrect(info, rect); | |
eaa434de NT |
1059 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
1060 | rect->width, rect->height); | |
742547b7 AT |
1061 | } |
1062 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); | |
1063 | ||
1064 | /** | |
1065 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea | |
1066 | * @info: fbdev registered by the helper | |
1067 | * @area: info about area to copy | |
1068 | * | |
1069 | * A wrapper around sys_copyarea implemented by fbdev core | |
1070 | */ | |
1071 | void drm_fb_helper_sys_copyarea(struct fb_info *info, | |
1072 | const struct fb_copyarea *area) | |
1073 | { | |
1074 | sys_copyarea(info, area); | |
eaa434de NT |
1075 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1076 | area->width, area->height); | |
742547b7 AT |
1077 | } |
1078 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); | |
1079 | ||
1080 | /** | |
1081 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit | |
1082 | * @info: fbdev registered by the helper | |
1083 | * @image: info about image to blit | |
1084 | * | |
1085 | * A wrapper around sys_imageblit implemented by fbdev core | |
1086 | */ | |
1087 | void drm_fb_helper_sys_imageblit(struct fb_info *info, | |
1088 | const struct fb_image *image) | |
1089 | { | |
1090 | sys_imageblit(info, image); | |
eaa434de NT |
1091 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1092 | image->width, image->height); | |
742547b7 AT |
1093 | } |
1094 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); | |
1095 | ||
1096 | /** | |
1097 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect | |
1098 | * @info: fbdev registered by the helper | |
1099 | * @rect: info about rectangle to fill | |
1100 | * | |
1101 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1102 | */ | |
1103 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, | |
1104 | const struct fb_fillrect *rect) | |
1105 | { | |
1106 | cfb_fillrect(info, rect); | |
eaa434de NT |
1107 | drm_fb_helper_dirty(info, rect->dx, rect->dy, |
1108 | rect->width, rect->height); | |
742547b7 AT |
1109 | } |
1110 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); | |
1111 | ||
1112 | /** | |
1113 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea | |
1114 | * @info: fbdev registered by the helper | |
1115 | * @area: info about area to copy | |
1116 | * | |
1117 | * A wrapper around cfb_copyarea implemented by fbdev core | |
1118 | */ | |
1119 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, | |
1120 | const struct fb_copyarea *area) | |
1121 | { | |
1122 | cfb_copyarea(info, area); | |
eaa434de NT |
1123 | drm_fb_helper_dirty(info, area->dx, area->dy, |
1124 | area->width, area->height); | |
742547b7 AT |
1125 | } |
1126 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); | |
1127 | ||
1128 | /** | |
1129 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit | |
1130 | * @info: fbdev registered by the helper | |
1131 | * @image: info about image to blit | |
1132 | * | |
1133 | * A wrapper around cfb_imageblit implemented by fbdev core | |
1134 | */ | |
1135 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, | |
1136 | const struct fb_image *image) | |
1137 | { | |
1138 | cfb_imageblit(info, image); | |
eaa434de NT |
1139 | drm_fb_helper_dirty(info, image->dx, image->dy, |
1140 | image->width, image->height); | |
742547b7 AT |
1141 | } |
1142 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); | |
1143 | ||
fdefa58a AT |
1144 | /** |
1145 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend | |
1146 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1147 | * @suspend: whether to suspend or resume |
fdefa58a | 1148 | * |
cfe63423 NT |
1149 | * A wrapper around fb_set_suspend implemented by fbdev core. |
1150 | * Use drm_fb_helper_set_suspend_unlocked() if you don't need to take | |
1151 | * the lock yourself | |
fdefa58a | 1152 | */ |
28579f37 | 1153 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend) |
fdefa58a AT |
1154 | { |
1155 | if (fb_helper && fb_helper->fbdev) | |
28579f37 | 1156 | fb_set_suspend(fb_helper->fbdev, suspend); |
fdefa58a AT |
1157 | } |
1158 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); | |
1159 | ||
cfe63423 NT |
1160 | /** |
1161 | * drm_fb_helper_set_suspend_unlocked - wrapper around fb_set_suspend that also | |
1162 | * takes the console lock | |
1163 | * @fb_helper: driver-allocated fbdev helper | |
28579f37 | 1164 | * @suspend: whether to suspend or resume |
cfe63423 NT |
1165 | * |
1166 | * A wrapper around fb_set_suspend() that takes the console lock. If the lock | |
1167 | * isn't available on resume, a worker is tasked with waiting for the lock | |
1168 | * to become available. The console lock can be pretty contented on resume | |
1169 | * due to all the printk activity. | |
1170 | * | |
1171 | * This function can be called multiple times with the same state since | |
6806cdf9 | 1172 | * &fb_info.state is checked to see if fbdev is running or not before locking. |
cfe63423 NT |
1173 | * |
1174 | * Use drm_fb_helper_set_suspend() if you need to take the lock yourself. | |
1175 | */ | |
1176 | void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, | |
28579f37 | 1177 | bool suspend) |
cfe63423 NT |
1178 | { |
1179 | if (!fb_helper || !fb_helper->fbdev) | |
1180 | return; | |
1181 | ||
1182 | /* make sure there's no pending/ongoing resume */ | |
1183 | flush_work(&fb_helper->resume_work); | |
1184 | ||
1185 | if (suspend) { | |
1186 | if (fb_helper->fbdev->state != FBINFO_STATE_RUNNING) | |
1187 | return; | |
1188 | ||
1189 | console_lock(); | |
1190 | ||
1191 | } else { | |
1192 | if (fb_helper->fbdev->state == FBINFO_STATE_RUNNING) | |
1193 | return; | |
1194 | ||
1195 | if (!console_trylock()) { | |
1196 | schedule_work(&fb_helper->resume_work); | |
1197 | return; | |
1198 | } | |
1199 | } | |
1200 | ||
1201 | fb_set_suspend(fb_helper->fbdev, suspend); | |
1202 | console_unlock(); | |
1203 | } | |
1204 | EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked); | |
1205 | ||
c850cb78 | 1206 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
1207 | u16 blue, u16 regno, struct fb_info *info) |
1208 | { | |
1209 | struct drm_fb_helper *fb_helper = info->par; | |
1210 | struct drm_framebuffer *fb = fb_helper->fb; | |
b8c00ac5 | 1211 | |
c850cb78 DA |
1212 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
1213 | u32 *palette; | |
1214 | u32 value; | |
1215 | /* place color in psuedopalette */ | |
1216 | if (regno > 16) | |
1217 | return -EINVAL; | |
1218 | palette = (u32 *)info->pseudo_palette; | |
1219 | red >>= (16 - info->var.red.length); | |
1220 | green >>= (16 - info->var.green.length); | |
1221 | blue >>= (16 - info->var.blue.length); | |
1222 | value = (red << info->var.red.offset) | | |
1223 | (green << info->var.green.offset) | | |
1224 | (blue << info->var.blue.offset); | |
9da12b6a RC |
1225 | if (info->var.transp.length > 0) { |
1226 | u32 mask = (1 << info->var.transp.length) - 1; | |
4b4f99f5 | 1227 | |
9da12b6a RC |
1228 | mask <<= info->var.transp.offset; |
1229 | value |= mask; | |
1230 | } | |
c850cb78 DA |
1231 | palette[regno] = value; |
1232 | return 0; | |
1233 | } | |
1234 | ||
04c0c569 VS |
1235 | /* |
1236 | * The driver really shouldn't advertise pseudo/directcolor | |
1237 | * visuals if it can't deal with the palette. | |
1238 | */ | |
1239 | if (WARN_ON(!fb_helper->funcs->gamma_set || | |
1240 | !fb_helper->funcs->gamma_get)) | |
1241 | return -EINVAL; | |
1242 | ||
272725c7 | 1243 | WARN_ON(fb->format->cpp[0] != 1); |
b8c00ac5 | 1244 | |
fef1480d | 1245 | fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); |
b8c00ac5 | 1246 | |
c850cb78 | 1247 | return 0; |
b8c00ac5 DA |
1248 | } |
1249 | ||
207fd329 | 1250 | /** |
6806cdf9 | 1251 | * drm_fb_helper_setcmap - implementation for &fb_ops.fb_setcmap |
207fd329 DV |
1252 | * @cmap: cmap to set |
1253 | * @info: fbdev registered by the helper | |
1254 | */ | |
068143d3 DA |
1255 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1256 | { | |
1257 | struct drm_fb_helper *fb_helper = info->par; | |
8391a3d5 | 1258 | struct drm_device *dev = fb_helper->dev; |
be26a66d | 1259 | const struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
1260 | u16 *red, *green, *blue, *transp; |
1261 | struct drm_crtc *crtc; | |
062ac622 | 1262 | int i, j, rc = 0; |
068143d3 DA |
1263 | int start; |
1264 | ||
c50bfd08 | 1265 | if (oops_in_progress) |
9aa609e1 | 1266 | return -EBUSY; |
c50bfd08 | 1267 | |
e9827d8e | 1268 | mutex_lock(&fb_helper->lock); |
8391a3d5 | 1269 | if (!drm_fb_helper_is_bound(fb_helper)) { |
e9827d8e | 1270 | mutex_unlock(&fb_helper->lock); |
8391a3d5 VS |
1271 | return -EBUSY; |
1272 | } | |
1273 | ||
bdac4a05 | 1274 | drm_modeset_lock_all(dev); |
8be48d92 DA |
1275 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1276 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
1277 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
1278 | |
1279 | red = cmap->red; | |
1280 | green = cmap->green; | |
1281 | blue = cmap->blue; | |
1282 | transp = cmap->transp; | |
1283 | start = cmap->start; | |
1284 | ||
062ac622 | 1285 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
1286 | u16 hred, hgreen, hblue, htransp = 0xffff; |
1287 | ||
1288 | hred = *red++; | |
1289 | hgreen = *green++; | |
1290 | hblue = *blue++; | |
1291 | ||
1292 | if (transp) | |
1293 | htransp = *transp++; | |
1294 | ||
c850cb78 DA |
1295 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
1296 | if (rc) | |
8391a3d5 | 1297 | goto out; |
068143d3 | 1298 | } |
04c0c569 VS |
1299 | if (crtc_funcs->load_lut) |
1300 | crtc_funcs->load_lut(crtc); | |
068143d3 | 1301 | } |
8391a3d5 VS |
1302 | out: |
1303 | drm_modeset_unlock_all(dev); | |
e9827d8e | 1304 | mutex_unlock(&fb_helper->lock); |
068143d3 DA |
1305 | return rc; |
1306 | } | |
1307 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
1308 | ||
0f3bbe07 MR |
1309 | /** |
1310 | * drm_fb_helper_ioctl - legacy ioctl implementation | |
1311 | * @info: fbdev registered by the helper | |
1312 | * @cmd: ioctl command | |
1313 | * @arg: ioctl argument | |
1314 | * | |
1315 | * A helper to implement the standard fbdev ioctl. Only | |
1316 | * FBIO_WAITFORVSYNC is implemented for now. | |
1317 | */ | |
1318 | int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd, | |
1319 | unsigned long arg) | |
1320 | { | |
1321 | struct drm_fb_helper *fb_helper = info->par; | |
0f3bbe07 MR |
1322 | struct drm_mode_set *mode_set; |
1323 | struct drm_crtc *crtc; | |
1324 | int ret = 0; | |
1325 | ||
e9827d8e | 1326 | mutex_lock(&fb_helper->lock); |
0f3bbe07 MR |
1327 | if (!drm_fb_helper_is_bound(fb_helper)) { |
1328 | ret = -EBUSY; | |
1329 | goto unlock; | |
1330 | } | |
1331 | ||
1332 | switch (cmd) { | |
1333 | case FBIO_WAITFORVSYNC: | |
1334 | /* | |
1335 | * Only consider the first CRTC. | |
1336 | * | |
1337 | * This ioctl is supposed to take the CRTC number as | |
1338 | * an argument, but in fbdev times, what that number | |
1339 | * was supposed to be was quite unclear, different | |
1340 | * drivers were passing that argument differently | |
1341 | * (some by reference, some by value), and most of the | |
1342 | * userspace applications were just hardcoding 0 as an | |
1343 | * argument. | |
1344 | * | |
1345 | * The first CRTC should be the integrated panel on | |
1346 | * most drivers, so this is the best choice we can | |
1347 | * make. If we're not smart enough here, one should | |
1348 | * just consider switch the userspace to KMS. | |
1349 | */ | |
1350 | mode_set = &fb_helper->crtc_info[0].mode_set; | |
1351 | crtc = mode_set->crtc; | |
1352 | ||
1353 | /* | |
1354 | * Only wait for a vblank event if the CRTC is | |
1355 | * enabled, otherwise just don't do anythintg, | |
1356 | * not even report an error. | |
1357 | */ | |
1358 | ret = drm_crtc_vblank_get(crtc); | |
1359 | if (!ret) { | |
1360 | drm_crtc_wait_one_vblank(crtc); | |
1361 | drm_crtc_vblank_put(crtc); | |
1362 | } | |
1363 | ||
1364 | ret = 0; | |
1365 | goto unlock; | |
1366 | default: | |
1367 | ret = -ENOTTY; | |
1368 | } | |
1369 | ||
1370 | unlock: | |
e9827d8e | 1371 | mutex_unlock(&fb_helper->lock); |
0f3bbe07 MR |
1372 | return ret; |
1373 | } | |
1374 | EXPORT_SYMBOL(drm_fb_helper_ioctl); | |
1375 | ||
207fd329 | 1376 | /** |
6806cdf9 | 1377 | * drm_fb_helper_check_var - implementation for &fb_ops.fb_check_var |
207fd329 DV |
1378 | * @var: screeninfo to check |
1379 | * @info: fbdev registered by the helper | |
1380 | */ | |
785b93ef DA |
1381 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
1382 | struct fb_info *info) | |
1383 | { | |
1384 | struct drm_fb_helper *fb_helper = info->par; | |
1385 | struct drm_framebuffer *fb = fb_helper->fb; | |
1386 | int depth; | |
1387 | ||
f90ebd9e | 1388 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
1389 | return -EINVAL; |
1390 | ||
865afb11 SA |
1391 | /* |
1392 | * Changes struct fb_var_screeninfo are currently not pushed back | |
1393 | * to KMS, hence fail if different settings are requested. | |
1394 | */ | |
272725c7 | 1395 | if (var->bits_per_pixel != fb->format->cpp[0] * 8 || |
12ffed96 MD |
1396 | var->xres > fb->width || var->yres > fb->height || |
1397 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
1398 | DRM_DEBUG("fb requested width/height/bpp can't fit in current fb " | |
62fb376e CW |
1399 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
1400 | var->xres, var->yres, var->bits_per_pixel, | |
1401 | var->xres_virtual, var->yres_virtual, | |
272725c7 | 1402 | fb->width, fb->height, fb->format->cpp[0] * 8); |
785b93ef DA |
1403 | return -EINVAL; |
1404 | } | |
1405 | ||
1406 | switch (var->bits_per_pixel) { | |
1407 | case 16: | |
1408 | depth = (var->green.length == 6) ? 16 : 15; | |
1409 | break; | |
1410 | case 32: | |
1411 | depth = (var->transp.length > 0) ? 32 : 24; | |
1412 | break; | |
1413 | default: | |
1414 | depth = var->bits_per_pixel; | |
1415 | break; | |
1416 | } | |
1417 | ||
1418 | switch (depth) { | |
1419 | case 8: | |
1420 | var->red.offset = 0; | |
1421 | var->green.offset = 0; | |
1422 | var->blue.offset = 0; | |
1423 | var->red.length = 8; | |
1424 | var->green.length = 8; | |
1425 | var->blue.length = 8; | |
1426 | var->transp.length = 0; | |
1427 | var->transp.offset = 0; | |
1428 | break; | |
1429 | case 15: | |
1430 | var->red.offset = 10; | |
1431 | var->green.offset = 5; | |
1432 | var->blue.offset = 0; | |
1433 | var->red.length = 5; | |
1434 | var->green.length = 5; | |
1435 | var->blue.length = 5; | |
1436 | var->transp.length = 1; | |
1437 | var->transp.offset = 15; | |
1438 | break; | |
1439 | case 16: | |
1440 | var->red.offset = 11; | |
1441 | var->green.offset = 5; | |
1442 | var->blue.offset = 0; | |
1443 | var->red.length = 5; | |
1444 | var->green.length = 6; | |
1445 | var->blue.length = 5; | |
1446 | var->transp.length = 0; | |
1447 | var->transp.offset = 0; | |
1448 | break; | |
1449 | case 24: | |
1450 | var->red.offset = 16; | |
1451 | var->green.offset = 8; | |
1452 | var->blue.offset = 0; | |
1453 | var->red.length = 8; | |
1454 | var->green.length = 8; | |
1455 | var->blue.length = 8; | |
1456 | var->transp.length = 0; | |
1457 | var->transp.offset = 0; | |
1458 | break; | |
1459 | case 32: | |
1460 | var->red.offset = 16; | |
1461 | var->green.offset = 8; | |
1462 | var->blue.offset = 0; | |
1463 | var->red.length = 8; | |
1464 | var->green.length = 8; | |
1465 | var->blue.length = 8; | |
1466 | var->transp.length = 8; | |
1467 | var->transp.offset = 24; | |
1468 | break; | |
1469 | default: | |
1470 | return -EINVAL; | |
1471 | } | |
1472 | return 0; | |
1473 | } | |
1474 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
1475 | ||
207fd329 | 1476 | /** |
6806cdf9 | 1477 | * drm_fb_helper_set_par - implementation for &fb_ops.fb_set_par |
207fd329 DV |
1478 | * @info: fbdev registered by the helper |
1479 | * | |
1480 | * This will let fbcon do the mode init and is called at initialization time by | |
1481 | * the fbdev core when registering the driver, and later on through the hotplug | |
1482 | * callback. | |
1483 | */ | |
785b93ef DA |
1484 | int drm_fb_helper_set_par(struct fb_info *info) |
1485 | { | |
1486 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1487 | struct fb_var_screeninfo *var = &info->var; |
785b93ef | 1488 | |
c50bfd08 DV |
1489 | if (oops_in_progress) |
1490 | return -EBUSY; | |
1491 | ||
5349ef31 | 1492 | if (var->pixclock != 0) { |
172e91f5 | 1493 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
1494 | return -EINVAL; |
1495 | } | |
1496 | ||
5ea1f752 | 1497 | drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); |
4abe3520 | 1498 | |
785b93ef DA |
1499 | return 0; |
1500 | } | |
1501 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
1502 | ||
1edf0269 | 1503 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
a0fb6ad7 | 1504 | struct fb_info *info) |
1edf0269 RC |
1505 | { |
1506 | struct drm_fb_helper *fb_helper = info->par; | |
1507 | struct drm_device *dev = fb_helper->dev; | |
1508 | struct drm_atomic_state *state; | |
07d3bad6 | 1509 | struct drm_plane *plane; |
1edf0269 | 1510 | int i, ret; |
4b4f99f5 | 1511 | unsigned int plane_mask; |
5c2e3448 DV |
1512 | struct drm_modeset_acquire_ctx ctx; |
1513 | ||
1514 | drm_modeset_acquire_init(&ctx, 0); | |
1edf0269 RC |
1515 | |
1516 | state = drm_atomic_state_alloc(dev); | |
5c2e3448 DV |
1517 | if (!state) { |
1518 | ret = -ENOMEM; | |
1519 | goto out_ctx; | |
1520 | } | |
1edf0269 | 1521 | |
5c2e3448 | 1522 | state->acquire_ctx = &ctx; |
1edf0269 | 1523 | retry: |
07d3bad6 | 1524 | plane_mask = 0; |
4b4f99f5 | 1525 | for (i = 0; i < fb_helper->crtc_count; i++) { |
1edf0269 RC |
1526 | struct drm_mode_set *mode_set; |
1527 | ||
1528 | mode_set = &fb_helper->crtc_info[i].mode_set; | |
1529 | ||
1530 | mode_set->x = var->xoffset; | |
1531 | mode_set->y = var->yoffset; | |
1532 | ||
1533 | ret = __drm_atomic_helper_set_config(mode_set, state); | |
1534 | if (ret != 0) | |
5c2e3448 | 1535 | goto out_state; |
07d3bad6 ML |
1536 | |
1537 | plane = mode_set->crtc->primary; | |
7118fd9b | 1538 | plane_mask |= (1 << drm_plane_index(plane)); |
07d3bad6 | 1539 | plane->old_fb = plane->fb; |
1edf0269 RC |
1540 | } |
1541 | ||
1542 | ret = drm_atomic_commit(state); | |
1543 | if (ret != 0) | |
5c2e3448 | 1544 | goto out_state; |
1edf0269 RC |
1545 | |
1546 | info->var.xoffset = var->xoffset; | |
1547 | info->var.yoffset = var->yoffset; | |
1548 | ||
5c2e3448 | 1549 | out_state: |
07d3bad6 | 1550 | drm_atomic_clean_old_fb(dev, plane_mask, ret); |
a0fb6ad7 | 1551 | |
1edf0269 RC |
1552 | if (ret == -EDEADLK) |
1553 | goto backoff; | |
1554 | ||
0853695c | 1555 | drm_atomic_state_put(state); |
5c2e3448 DV |
1556 | out_ctx: |
1557 | drm_modeset_drop_locks(&ctx); | |
1558 | drm_modeset_acquire_fini(&ctx); | |
1559 | ||
1edf0269 RC |
1560 | return ret; |
1561 | ||
1562 | backoff: | |
1563 | drm_atomic_state_clear(state); | |
5c2e3448 | 1564 | drm_modeset_backoff(&ctx); |
1edf0269 RC |
1565 | |
1566 | goto retry; | |
1567 | } | |
1568 | ||
7128645d | 1569 | static int pan_display_legacy(struct fb_var_screeninfo *var, |
785b93ef DA |
1570 | struct fb_info *info) |
1571 | { | |
1572 | struct drm_fb_helper *fb_helper = info->par; | |
785b93ef | 1573 | struct drm_mode_set *modeset; |
785b93ef DA |
1574 | int ret = 0; |
1575 | int i; | |
1576 | ||
5c2e3448 | 1577 | drm_modeset_lock_all(fb_helper->dev); |
8be48d92 | 1578 | for (i = 0; i < fb_helper->crtc_count; i++) { |
785b93ef DA |
1579 | modeset = &fb_helper->crtc_info[i].mode_set; |
1580 | ||
1581 | modeset->x = var->xoffset; | |
1582 | modeset->y = var->yoffset; | |
1583 | ||
1584 | if (modeset->num_connectors) { | |
2d13b679 | 1585 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
1586 | if (!ret) { |
1587 | info->var.xoffset = var->xoffset; | |
1588 | info->var.yoffset = var->yoffset; | |
1589 | } | |
1590 | } | |
1591 | } | |
5c2e3448 | 1592 | drm_modeset_unlock_all(fb_helper->dev); |
7128645d DV |
1593 | |
1594 | return ret; | |
1595 | } | |
1596 | ||
1597 | /** | |
1598 | * drm_fb_helper_pan_display - implementation for &fb_ops.fb_pan_display | |
1599 | * @var: updated screen information | |
1600 | * @info: fbdev registered by the helper | |
1601 | */ | |
1602 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, | |
1603 | struct fb_info *info) | |
1604 | { | |
1605 | struct drm_fb_helper *fb_helper = info->par; | |
1606 | struct drm_device *dev = fb_helper->dev; | |
1607 | int ret; | |
1608 | ||
1609 | if (oops_in_progress) | |
1610 | return -EBUSY; | |
1611 | ||
e9827d8e | 1612 | mutex_lock(&fb_helper->lock); |
7128645d | 1613 | if (!drm_fb_helper_is_bound(fb_helper)) { |
e9827d8e | 1614 | mutex_unlock(&fb_helper->lock); |
7128645d DV |
1615 | return -EBUSY; |
1616 | } | |
1617 | ||
1618 | if (drm_drv_uses_atomic_modeset(dev)) | |
1619 | ret = pan_display_atomic(var, info); | |
1620 | else | |
1621 | ret = pan_display_legacy(var, info); | |
e9827d8e | 1622 | mutex_unlock(&fb_helper->lock); |
7128645d | 1623 | |
785b93ef DA |
1624 | return ret; |
1625 | } | |
1626 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
1627 | ||
8acf658a | 1628 | /* |
207fd329 DV |
1629 | * Allocates the backing storage and sets up the fbdev info structure through |
1630 | * the ->fb_probe callback and then registers the fbdev and sets up the panic | |
1631 | * notifier. | |
8acf658a | 1632 | */ |
de1ace5b DV |
1633 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
1634 | int preferred_bpp) | |
785b93ef | 1635 | { |
8acf658a | 1636 | int ret = 0; |
785b93ef | 1637 | int crtc_count = 0; |
4abe3520 | 1638 | int i; |
38651674 | 1639 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 1640 | int gamma_size = 0; |
38651674 DA |
1641 | |
1642 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
1643 | sizes.surface_depth = 24; | |
1644 | sizes.surface_bpp = 32; | |
4b4f99f5 TR |
1645 | sizes.fb_width = (u32)-1; |
1646 | sizes.fb_height = (u32)-1; | |
785b93ef | 1647 | |
4b4f99f5 | 1648 | /* if driver picks 8 or 16 by default use that for both depth/bpp */ |
96081cdf | 1649 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 1650 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 1651 | |
785b93ef | 1652 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
966a6a13 | 1653 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1654 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; |
1794d257 | 1655 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 1656 | |
eaf99c74 | 1657 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
d50ba256 DA |
1658 | |
1659 | if (cmdline_mode->bpp_specified) { | |
1660 | switch (cmdline_mode->bpp) { | |
1661 | case 8: | |
38651674 | 1662 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
1663 | break; |
1664 | case 15: | |
38651674 DA |
1665 | sizes.surface_depth = 15; |
1666 | sizes.surface_bpp = 16; | |
d50ba256 DA |
1667 | break; |
1668 | case 16: | |
38651674 | 1669 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
1670 | break; |
1671 | case 24: | |
38651674 | 1672 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
1673 | break; |
1674 | case 32: | |
38651674 DA |
1675 | sizes.surface_depth = 24; |
1676 | sizes.surface_bpp = 32; | |
d50ba256 DA |
1677 | break; |
1678 | } | |
1679 | break; | |
1680 | } | |
1681 | } | |
1682 | ||
8be48d92 DA |
1683 | crtc_count = 0; |
1684 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1685 | struct drm_display_mode *desired_mode; | |
0e3704c9 RC |
1686 | struct drm_mode_set *mode_set; |
1687 | int x, y, j; | |
1688 | /* in case of tile group, are we the last tile vert or horiz? | |
1689 | * If no tile group you are always the last one both vertically | |
1690 | * and horizontally | |
1691 | */ | |
1692 | bool lastv = true, lasth = true; | |
675c8328 | 1693 | |
8be48d92 | 1694 | desired_mode = fb_helper->crtc_info[i].desired_mode; |
0e3704c9 | 1695 | mode_set = &fb_helper->crtc_info[i].mode_set; |
675c8328 RC |
1696 | |
1697 | if (!desired_mode) | |
1698 | continue; | |
1699 | ||
1700 | crtc_count++; | |
1701 | ||
b0ee9e7f DA |
1702 | x = fb_helper->crtc_info[i].x; |
1703 | y = fb_helper->crtc_info[i].y; | |
675c8328 RC |
1704 | |
1705 | if (gamma_size == 0) | |
1706 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
1707 | ||
1708 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); | |
1709 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); | |
0e3704c9 RC |
1710 | |
1711 | for (j = 0; j < mode_set->num_connectors; j++) { | |
1712 | struct drm_connector *connector = mode_set->connectors[j]; | |
4b4f99f5 | 1713 | |
0e3704c9 RC |
1714 | if (connector->has_tile) { |
1715 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); | |
1716 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); | |
1717 | /* cloning to multiple tiles is just crazy-talk, so: */ | |
1718 | break; | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | if (lasth) | |
1723 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); | |
1724 | if (lastv) | |
1725 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); | |
785b93ef DA |
1726 | } |
1727 | ||
38651674 | 1728 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
4b4f99f5 TR |
1729 | /* |
1730 | * hmm everyone went away - assume VGA cable just fell out | |
1731 | * and will come back later. | |
1732 | */ | |
eb1f8e4f | 1733 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
1734 | sizes.fb_width = sizes.surface_width = 1024; |
1735 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
1736 | } |
1737 | ||
5f152576 XL |
1738 | /* Handle our overallocation */ |
1739 | sizes.surface_height *= drm_fbdev_overalloc; | |
1740 | sizes.surface_height /= 100; | |
1741 | ||
38651674 | 1742 | /* push down into drivers */ |
8acf658a DV |
1743 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
1744 | if (ret < 0) | |
1745 | return ret; | |
785b93ef | 1746 | |
7e53f3a4 DV |
1747 | /* |
1748 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
1749 | * events, but at init time drm_setup_crtcs needs to be called before | |
1750 | * the fb is allocated (since we need to figure out the desired size of | |
1751 | * the fb before we can allocate it ...). Hence we need to fix things up | |
1752 | * here again. | |
1753 | */ | |
96081cdf | 1754 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
1755 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
1756 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
1757 | ||
785b93ef DA |
1758 | return 0; |
1759 | } | |
785b93ef | 1760 | |
207fd329 DV |
1761 | /** |
1762 | * drm_fb_helper_fill_fix - initializes fixed fbdev information | |
1763 | * @info: fbdev registered by the helper | |
1764 | * @pitch: desired pitch | |
1765 | * @depth: desired depth | |
1766 | * | |
1767 | * Helper to fill in the fixed fbdev information useful for a non-accelerated | |
1768 | * fbdev emulations. Drivers which support acceleration methods which impose | |
1769 | * additional constraints need to set up their own limits. | |
1770 | * | |
1771 | * Drivers should call this (or their equivalent setup code) from their | |
6806cdf9 | 1772 | * &drm_fb_helper_funcs.fb_probe callback. |
207fd329 | 1773 | */ |
3632ef89 DA |
1774 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
1775 | uint32_t depth) | |
1776 | { | |
1777 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
1778 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
1779 | FB_VISUAL_TRUECOLOR; | |
1780 | info->fix.mmio_start = 0; | |
1781 | info->fix.mmio_len = 0; | |
1782 | info->fix.type_aux = 0; | |
1783 | info->fix.xpanstep = 1; /* doing it in hw */ | |
1784 | info->fix.ypanstep = 1; /* doing it in hw */ | |
1785 | info->fix.ywrapstep = 0; | |
1786 | info->fix.accel = FB_ACCEL_NONE; | |
3632ef89 DA |
1787 | |
1788 | info->fix.line_length = pitch; | |
3632ef89 DA |
1789 | } |
1790 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
1791 | ||
207fd329 DV |
1792 | /** |
1793 | * drm_fb_helper_fill_var - initalizes variable fbdev information | |
1794 | * @info: fbdev instance to set up | |
1795 | * @fb_helper: fb helper instance to use as template | |
1796 | * @fb_width: desired fb width | |
1797 | * @fb_height: desired fb height | |
1798 | * | |
1799 | * Sets up the variable fbdev metainformation from the given fb helper instance | |
6806cdf9 | 1800 | * and the drm framebuffer allocated in &drm_fb_helper.fb. |
207fd329 DV |
1801 | * |
1802 | * Drivers should call this (or their equivalent setup code) from their | |
6806cdf9 DV |
1803 | * &drm_fb_helper_funcs.fb_probe callback after having allocated the fbdev |
1804 | * backing storage framebuffer. | |
207fd329 | 1805 | */ |
38651674 | 1806 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
1807 | uint32_t fb_width, uint32_t fb_height) |
1808 | { | |
38651674 | 1809 | struct drm_framebuffer *fb = fb_helper->fb; |
4b4f99f5 | 1810 | |
38651674 | 1811 | info->pseudo_palette = fb_helper->pseudo_palette; |
785b93ef DA |
1812 | info->var.xres_virtual = fb->width; |
1813 | info->var.yres_virtual = fb->height; | |
272725c7 | 1814 | info->var.bits_per_pixel = fb->format->cpp[0] * 8; |
57084d05 | 1815 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
1816 | info->var.xoffset = 0; |
1817 | info->var.yoffset = 0; | |
1818 | info->var.activate = FB_ACTIVATE_NOW; | |
1819 | info->var.height = -1; | |
1820 | info->var.width = -1; | |
1821 | ||
b00c600e | 1822 | switch (fb->format->depth) { |
785b93ef DA |
1823 | case 8: |
1824 | info->var.red.offset = 0; | |
1825 | info->var.green.offset = 0; | |
1826 | info->var.blue.offset = 0; | |
1827 | info->var.red.length = 8; /* 8bit DAC */ | |
1828 | info->var.green.length = 8; | |
1829 | info->var.blue.length = 8; | |
1830 | info->var.transp.offset = 0; | |
1831 | info->var.transp.length = 0; | |
1832 | break; | |
1833 | case 15: | |
1834 | info->var.red.offset = 10; | |
1835 | info->var.green.offset = 5; | |
1836 | info->var.blue.offset = 0; | |
1837 | info->var.red.length = 5; | |
1838 | info->var.green.length = 5; | |
1839 | info->var.blue.length = 5; | |
1840 | info->var.transp.offset = 15; | |
1841 | info->var.transp.length = 1; | |
1842 | break; | |
1843 | case 16: | |
1844 | info->var.red.offset = 11; | |
1845 | info->var.green.offset = 5; | |
1846 | info->var.blue.offset = 0; | |
1847 | info->var.red.length = 5; | |
1848 | info->var.green.length = 6; | |
1849 | info->var.blue.length = 5; | |
1850 | info->var.transp.offset = 0; | |
1851 | break; | |
1852 | case 24: | |
1853 | info->var.red.offset = 16; | |
1854 | info->var.green.offset = 8; | |
1855 | info->var.blue.offset = 0; | |
1856 | info->var.red.length = 8; | |
1857 | info->var.green.length = 8; | |
1858 | info->var.blue.length = 8; | |
1859 | info->var.transp.offset = 0; | |
1860 | info->var.transp.length = 0; | |
1861 | break; | |
1862 | case 32: | |
1863 | info->var.red.offset = 16; | |
1864 | info->var.green.offset = 8; | |
1865 | info->var.blue.offset = 0; | |
1866 | info->var.red.length = 8; | |
1867 | info->var.green.length = 8; | |
1868 | info->var.blue.length = 8; | |
1869 | info->var.transp.offset = 24; | |
1870 | info->var.transp.length = 8; | |
1871 | break; | |
1872 | default: | |
1873 | break; | |
1874 | } | |
1875 | ||
1876 | info->var.xres = fb_width; | |
1877 | info->var.yres = fb_height; | |
1878 | } | |
1879 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 1880 | |
0b4c0f3f DA |
1881 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
1882 | uint32_t maxX, | |
1883 | uint32_t maxY) | |
38651674 DA |
1884 | { |
1885 | struct drm_connector *connector; | |
1886 | int count = 0; | |
0b4c0f3f | 1887 | int i; |
38651674 | 1888 | |
966a6a13 | 1889 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1890 | connector = fb_helper->connector_info[i]->connector; |
38651674 DA |
1891 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
1892 | } | |
1893 | ||
1894 | return count; | |
1895 | } | |
1896 | ||
2f1046f3 | 1897 | struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
1898 | { |
1899 | struct drm_display_mode *mode; | |
1900 | ||
0b4c0f3f | 1901 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
9d3de138 DV |
1902 | if (mode->hdisplay > width || |
1903 | mode->vdisplay > height) | |
38651674 DA |
1904 | continue; |
1905 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
1906 | return mode; | |
1907 | } | |
1908 | return NULL; | |
1909 | } | |
2f1046f3 | 1910 | EXPORT_SYMBOL(drm_has_preferred_mode); |
38651674 | 1911 | |
0b4c0f3f | 1912 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1913 | { |
eaf99c74 | 1914 | return fb_connector->connector->cmdline_mode.specified; |
38651674 DA |
1915 | } |
1916 | ||
a09759e8 | 1917 | struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn) |
38651674 | 1918 | { |
1794d257 | 1919 | struct drm_cmdline_mode *cmdline_mode; |
f3af5c7d | 1920 | struct drm_display_mode *mode; |
c683f427 | 1921 | bool prefer_non_interlace; |
38651674 | 1922 | |
eaf99c74 | 1923 | cmdline_mode = &fb_helper_conn->connector->cmdline_mode; |
38651674 | 1924 | if (cmdline_mode->specified == false) |
f3af5c7d | 1925 | return NULL; |
38651674 DA |
1926 | |
1927 | /* attempt to find a matching mode in the list of modes | |
1928 | * we have gotten so far, if not add a CVT mode that conforms | |
1929 | */ | |
1930 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1931 | goto create_mode; | |
1932 | ||
c683f427 | 1933 | prefer_non_interlace = !cmdline_mode->interlace; |
f3af5c7d | 1934 | again: |
0b4c0f3f | 1935 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1936 | /* check width/height */ |
1937 | if (mode->hdisplay != cmdline_mode->xres || | |
1938 | mode->vdisplay != cmdline_mode->yres) | |
1939 | continue; | |
1940 | ||
1941 | if (cmdline_mode->refresh_specified) { | |
1942 | if (mode->vrefresh != cmdline_mode->refresh) | |
1943 | continue; | |
1944 | } | |
1945 | ||
1946 | if (cmdline_mode->interlace) { | |
1947 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1948 | continue; | |
c683f427 TI |
1949 | } else if (prefer_non_interlace) { |
1950 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
1951 | continue; | |
38651674 DA |
1952 | } |
1953 | return mode; | |
1954 | } | |
1955 | ||
c683f427 TI |
1956 | if (prefer_non_interlace) { |
1957 | prefer_non_interlace = false; | |
1958 | goto again; | |
1959 | } | |
1960 | ||
38651674 | 1961 | create_mode: |
1794d257 CW |
1962 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1963 | cmdline_mode); | |
0b4c0f3f | 1964 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1965 | return mode; |
1966 | } | |
2f1046f3 | 1967 | EXPORT_SYMBOL(drm_pick_cmdline_mode); |
38651674 DA |
1968 | |
1969 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1970 | { | |
1971 | bool enable; | |
1972 | ||
96081cdf | 1973 | if (strict) |
38651674 | 1974 | enable = connector->status == connector_status_connected; |
96081cdf | 1975 | else |
38651674 | 1976 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1977 | |
38651674 DA |
1978 | return enable; |
1979 | } | |
1980 | ||
0b4c0f3f DA |
1981 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1982 | bool *enabled) | |
38651674 DA |
1983 | { |
1984 | bool any_enabled = false; | |
1985 | struct drm_connector *connector; | |
1986 | int i = 0; | |
1987 | ||
966a6a13 | 1988 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 1989 | connector = fb_helper->connector_info[i]->connector; |
38651674 DA |
1990 | enabled[i] = drm_connector_enabled(connector, true); |
1991 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1992 | enabled[i] ? "yes" : "no"); | |
1993 | any_enabled |= enabled[i]; | |
38651674 DA |
1994 | } |
1995 | ||
1996 | if (any_enabled) | |
1997 | return; | |
1998 | ||
966a6a13 | 1999 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 2000 | connector = fb_helper->connector_info[i]->connector; |
38651674 | 2001 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
2002 | } |
2003 | } | |
2004 | ||
1d42bbc8 DA |
2005 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
2006 | struct drm_display_mode **modes, | |
b0ee9e7f | 2007 | struct drm_fb_offset *offsets, |
1d42bbc8 DA |
2008 | bool *enabled, int width, int height) |
2009 | { | |
2010 | int count, i, j; | |
2011 | bool can_clone = false; | |
2012 | struct drm_fb_helper_connector *fb_helper_conn; | |
2013 | struct drm_display_mode *dmt_mode, *mode; | |
2014 | ||
2015 | /* only contemplate cloning in the single crtc case */ | |
2016 | if (fb_helper->crtc_count > 1) | |
2017 | return false; | |
2018 | ||
2019 | count = 0; | |
966a6a13 | 2020 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
2021 | if (enabled[i]) |
2022 | count++; | |
2023 | } | |
2024 | ||
2025 | /* only contemplate cloning if more than one connector is enabled */ | |
2026 | if (count <= 1) | |
2027 | return false; | |
2028 | ||
2029 | /* check the command line or if nothing common pick 1024x768 */ | |
2030 | can_clone = true; | |
966a6a13 | 2031 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
2032 | if (!enabled[i]) |
2033 | continue; | |
2034 | fb_helper_conn = fb_helper->connector_info[i]; | |
a09759e8 | 2035 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn); |
1d42bbc8 DA |
2036 | if (!modes[i]) { |
2037 | can_clone = false; | |
2038 | break; | |
2039 | } | |
2040 | for (j = 0; j < i; j++) { | |
2041 | if (!enabled[j]) | |
2042 | continue; | |
2043 | if (!drm_mode_equal(modes[j], modes[i])) | |
2044 | can_clone = false; | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | if (can_clone) { | |
2049 | DRM_DEBUG_KMS("can clone using command line\n"); | |
2050 | return true; | |
2051 | } | |
2052 | ||
2053 | /* try and find a 1024x768 mode on each connector */ | |
2054 | can_clone = true; | |
f6e252ba | 2055 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 | 2056 | |
966a6a13 | 2057 | drm_fb_helper_for_each_connector(fb_helper, i) { |
1d42bbc8 DA |
2058 | if (!enabled[i]) |
2059 | continue; | |
2060 | ||
2061 | fb_helper_conn = fb_helper->connector_info[i]; | |
2062 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
2063 | if (drm_mode_equal(mode, dmt_mode)) | |
2064 | modes[i] = mode; | |
2065 | } | |
2066 | if (!modes[i]) | |
2067 | can_clone = false; | |
2068 | } | |
2069 | ||
2070 | if (can_clone) { | |
2071 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
2072 | return true; | |
2073 | } | |
2074 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
2075 | return false; | |
2076 | } | |
2077 | ||
b0ee9e7f DA |
2078 | static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, |
2079 | struct drm_display_mode **modes, | |
2080 | struct drm_fb_offset *offsets, | |
2081 | int idx, | |
2082 | int h_idx, int v_idx) | |
2083 | { | |
2084 | struct drm_fb_helper_connector *fb_helper_conn; | |
2085 | int i; | |
2086 | int hoffset = 0, voffset = 0; | |
2087 | ||
966a6a13 | 2088 | drm_fb_helper_for_each_connector(fb_helper, i) { |
b0ee9e7f DA |
2089 | fb_helper_conn = fb_helper->connector_info[i]; |
2090 | if (!fb_helper_conn->connector->has_tile) | |
2091 | continue; | |
2092 | ||
2093 | if (!modes[i] && (h_idx || v_idx)) { | |
2094 | DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, | |
2095 | fb_helper_conn->connector->base.id); | |
2096 | continue; | |
2097 | } | |
2098 | if (fb_helper_conn->connector->tile_h_loc < h_idx) | |
2099 | hoffset += modes[i]->hdisplay; | |
2100 | ||
2101 | if (fb_helper_conn->connector->tile_v_loc < v_idx) | |
2102 | voffset += modes[i]->vdisplay; | |
2103 | } | |
2104 | offsets[idx].x = hoffset; | |
2105 | offsets[idx].y = voffset; | |
2106 | DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); | |
2107 | return 0; | |
2108 | } | |
2109 | ||
0b4c0f3f | 2110 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 | 2111 | struct drm_display_mode **modes, |
b0ee9e7f | 2112 | struct drm_fb_offset *offsets, |
38651674 DA |
2113 | bool *enabled, int width, int height) |
2114 | { | |
0b4c0f3f | 2115 | struct drm_fb_helper_connector *fb_helper_conn; |
c96521ee CW |
2116 | const u64 mask = BIT_ULL(fb_helper->connector_count) - 1; |
2117 | u64 conn_configured = 0; | |
b0ee9e7f | 2118 | int tile_pass = 0; |
c96521ee CW |
2119 | int i; |
2120 | ||
b0ee9e7f | 2121 | retry: |
966a6a13 | 2122 | drm_fb_helper_for_each_connector(fb_helper, i) { |
0b4c0f3f | 2123 | fb_helper_conn = fb_helper->connector_info[i]; |
38651674 | 2124 | |
c96521ee | 2125 | if (conn_configured & BIT_ULL(i)) |
b0ee9e7f DA |
2126 | continue; |
2127 | ||
2128 | if (enabled[i] == false) { | |
c96521ee | 2129 | conn_configured |= BIT_ULL(i); |
b0ee9e7f DA |
2130 | continue; |
2131 | } | |
2132 | ||
2133 | /* first pass over all the untiled connectors */ | |
2134 | if (tile_pass == 0 && fb_helper_conn->connector->has_tile) | |
38651674 | 2135 | continue; |
38651674 | 2136 | |
b0ee9e7f DA |
2137 | if (tile_pass == 1) { |
2138 | if (fb_helper_conn->connector->tile_h_loc != 0 || | |
2139 | fb_helper_conn->connector->tile_v_loc != 0) | |
2140 | continue; | |
2141 | ||
2142 | } else { | |
4b4f99f5 | 2143 | if (fb_helper_conn->connector->tile_h_loc != tile_pass - 1 && |
b0ee9e7f DA |
2144 | fb_helper_conn->connector->tile_v_loc != tile_pass - 1) |
2145 | /* if this tile_pass doesn't cover any of the tiles - keep going */ | |
2146 | continue; | |
2147 | ||
4b4f99f5 TR |
2148 | /* |
2149 | * find the tile offsets for this pass - need to find | |
2150 | * all tiles left and above | |
2151 | */ | |
b0ee9e7f DA |
2152 | drm_get_tile_offsets(fb_helper, modes, offsets, |
2153 | i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); | |
2154 | } | |
38651674 | 2155 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
0b4c0f3f | 2156 | fb_helper_conn->connector->base.id); |
38651674 DA |
2157 | |
2158 | /* got for command line mode first */ | |
a09759e8 | 2159 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn); |
38651674 | 2160 | if (!modes[i]) { |
b0ee9e7f DA |
2161 | DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
2162 | fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); | |
0b4c0f3f | 2163 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); |
38651674 DA |
2164 | } |
2165 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
2166 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
2167 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
2168 | break; |
2169 | } | |
2170 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
2171 | "none"); | |
c96521ee | 2172 | conn_configured |= BIT_ULL(i); |
b0ee9e7f DA |
2173 | } |
2174 | ||
2175 | if ((conn_configured & mask) != mask) { | |
2176 | tile_pass++; | |
2177 | goto retry; | |
38651674 DA |
2178 | } |
2179 | return true; | |
2180 | } | |
2181 | ||
8be48d92 DA |
2182 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
2183 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
2184 | struct drm_display_mode **modes, |
2185 | int n, int width, int height) | |
2186 | { | |
2187 | int c, o; | |
2188 | struct drm_connector *connector; | |
be26a66d | 2189 | const struct drm_connector_helper_funcs *connector_funcs; |
38651674 | 2190 | struct drm_encoder *encoder; |
38651674 | 2191 | int my_score, best_score, score; |
8be48d92 | 2192 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 2193 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 2194 | |
0b4c0f3f | 2195 | if (n == fb_helper->connector_count) |
38651674 | 2196 | return 0; |
0b4c0f3f DA |
2197 | |
2198 | fb_helper_conn = fb_helper->connector_info[n]; | |
2199 | connector = fb_helper_conn->connector; | |
38651674 DA |
2200 | |
2201 | best_crtcs[n] = NULL; | |
8be48d92 | 2202 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
2203 | if (modes[n] == NULL) |
2204 | return best_score; | |
2205 | ||
255f0e7c | 2206 | crtcs = kzalloc(fb_helper->connector_count * |
8be48d92 | 2207 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
2208 | if (!crtcs) |
2209 | return best_score; | |
2210 | ||
2211 | my_score = 1; | |
2212 | if (connector->status == connector_status_connected) | |
2213 | my_score++; | |
0b4c0f3f | 2214 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 2215 | my_score++; |
0b4c0f3f | 2216 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
2217 | my_score++; |
2218 | ||
2219 | connector_funcs = connector->helper_private; | |
c61b93fe BB |
2220 | |
2221 | /* | |
2222 | * If the DRM device implements atomic hooks and ->best_encoder() is | |
2223 | * NULL we fallback to the default drm_atomic_helper_best_encoder() | |
2224 | * helper. | |
2225 | */ | |
a743d758 | 2226 | if (drm_drv_uses_atomic_modeset(fb_helper->dev) && |
c61b93fe BB |
2227 | !connector_funcs->best_encoder) |
2228 | encoder = drm_atomic_helper_best_encoder(connector); | |
2229 | else | |
2230 | encoder = connector_funcs->best_encoder(connector); | |
2231 | ||
38651674 DA |
2232 | if (!encoder) |
2233 | goto out; | |
2234 | ||
4b4f99f5 TR |
2235 | /* |
2236 | * select a crtc for this connector and then attempt to configure | |
2237 | * remaining connectors | |
2238 | */ | |
8be48d92 DA |
2239 | for (c = 0; c < fb_helper->crtc_count; c++) { |
2240 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 2241 | |
96081cdf | 2242 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 2243 | continue; |
38651674 DA |
2244 | |
2245 | for (o = 0; o < n; o++) | |
2246 | if (best_crtcs[o] == crtc) | |
2247 | break; | |
2248 | ||
2249 | if (o < n) { | |
1d42bbc8 DA |
2250 | /* ignore cloning unless only a single crtc */ |
2251 | if (fb_helper->crtc_count > 1) | |
2252 | continue; | |
2253 | ||
2254 | if (!drm_mode_equal(modes[o], modes[n])) | |
2255 | continue; | |
38651674 DA |
2256 | } |
2257 | ||
2258 | crtcs[n] = crtc; | |
8be48d92 DA |
2259 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
2260 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
2261 | width, height); |
2262 | if (score > best_score) { | |
38651674 DA |
2263 | best_score = score; |
2264 | memcpy(best_crtcs, crtcs, | |
255f0e7c | 2265 | fb_helper->connector_count * |
8be48d92 | 2266 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 2267 | } |
38651674 DA |
2268 | } |
2269 | out: | |
2270 | kfree(crtcs); | |
2271 | return best_score; | |
2272 | } | |
2273 | ||
64e94407 CW |
2274 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, |
2275 | u32 width, u32 height) | |
38651674 | 2276 | { |
8be48d92 DA |
2277 | struct drm_device *dev = fb_helper->dev; |
2278 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 2279 | struct drm_display_mode **modes; |
b0ee9e7f | 2280 | struct drm_fb_offset *offsets; |
38651674 | 2281 | bool *enabled; |
11e17a08 | 2282 | int i; |
38651674 DA |
2283 | |
2284 | DRM_DEBUG_KMS("\n"); | |
64e94407 CW |
2285 | if (drm_fb_helper_probe_connector_modes(fb_helper, width, height) == 0) |
2286 | DRM_DEBUG_KMS("No connectors reported connected with modes\n"); | |
38651674 | 2287 | |
966a6a13 | 2288 | /* prevent concurrent modification of connector_count by hotplug */ |
e9827d8e | 2289 | lockdep_assert_held(&fb_helper->lock); |
966a6a13 CW |
2290 | lockdep_assert_held(&fb_helper->dev->mode_config.mutex); |
2291 | ||
383b2e57 | 2292 | crtcs = kcalloc(fb_helper->connector_count, |
8be48d92 | 2293 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
383b2e57 | 2294 | modes = kcalloc(fb_helper->connector_count, |
38651674 | 2295 | sizeof(struct drm_display_mode *), GFP_KERNEL); |
383b2e57 | 2296 | offsets = kcalloc(fb_helper->connector_count, |
b0ee9e7f | 2297 | sizeof(struct drm_fb_offset), GFP_KERNEL); |
383b2e57 | 2298 | enabled = kcalloc(fb_helper->connector_count, |
38651674 | 2299 | sizeof(bool), GFP_KERNEL); |
b0ee9e7f | 2300 | if (!crtcs || !modes || !enabled || !offsets) { |
8c5eaca0 SK |
2301 | DRM_ERROR("Memory allocation failed\n"); |
2302 | goto out; | |
2303 | } | |
2304 | ||
0b4c0f3f | 2305 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 2306 | |
11e17a08 JB |
2307 | if (!(fb_helper->funcs->initial_config && |
2308 | fb_helper->funcs->initial_config(fb_helper, crtcs, modes, | |
b0ee9e7f | 2309 | offsets, |
11e17a08 | 2310 | enabled, width, height))) { |
383b2e57 ML |
2311 | memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); |
2312 | memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); | |
2313 | memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); | |
11e17a08 | 2314 | |
b0ee9e7f DA |
2315 | if (!drm_target_cloned(fb_helper, modes, offsets, |
2316 | enabled, width, height) && | |
2317 | !drm_target_preferred(fb_helper, modes, offsets, | |
2318 | enabled, width, height)) | |
1d42bbc8 | 2319 | DRM_ERROR("Unable to find initial modes\n"); |
38651674 | 2320 | |
11e17a08 JB |
2321 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
2322 | width, height); | |
38651674 | 2323 | |
11e17a08 JB |
2324 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
2325 | } | |
8be48d92 DA |
2326 | |
2327 | /* need to set the modesets up here for use later */ | |
2328 | /* fill out the connector<->crtc mappings into the modesets */ | |
a2889606 VS |
2329 | for (i = 0; i < fb_helper->crtc_count; i++) |
2330 | drm_fb_helper_modeset_release(fb_helper, | |
2331 | &fb_helper->crtc_info[i].mode_set); | |
38651674 | 2332 | |
966a6a13 | 2333 | drm_fb_helper_for_each_connector(fb_helper, i) { |
38651674 | 2334 | struct drm_display_mode *mode = modes[i]; |
8be48d92 | 2335 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
b0ee9e7f | 2336 | struct drm_fb_offset *offset = &offsets[i]; |
a2889606 | 2337 | struct drm_mode_set *modeset = &fb_crtc->mode_set; |
38651674 | 2338 | |
8be48d92 | 2339 | if (mode && fb_crtc) { |
a2889606 VS |
2340 | struct drm_connector *connector = |
2341 | fb_helper->connector_info[i]->connector; | |
2342 | ||
b0ee9e7f DA |
2343 | DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
2344 | mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); | |
a2889606 | 2345 | |
8be48d92 | 2346 | fb_crtc->desired_mode = mode; |
b0ee9e7f DA |
2347 | fb_crtc->x = offset->x; |
2348 | fb_crtc->y = offset->y; | |
8be48d92 DA |
2349 | modeset->mode = drm_mode_duplicate(dev, |
2350 | fb_crtc->desired_mode); | |
ad093607 | 2351 | drm_connector_get(connector); |
a2889606 | 2352 | modeset->connectors[modeset->num_connectors++] = connector; |
7e53f3a4 | 2353 | modeset->fb = fb_helper->fb; |
b0ee9e7f DA |
2354 | modeset->x = offset->x; |
2355 | modeset->y = offset->y; | |
7e53f3a4 DV |
2356 | } |
2357 | } | |
8c5eaca0 | 2358 | out: |
38651674 DA |
2359 | kfree(crtcs); |
2360 | kfree(modes); | |
b0ee9e7f | 2361 | kfree(offsets); |
38651674 DA |
2362 | kfree(enabled); |
2363 | } | |
2364 | ||
2365 | /** | |
207fd329 | 2366 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
d0ddc033 DV |
2367 | * @fb_helper: fb_helper device struct |
2368 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 | 2369 | * |
d0ddc033 | 2370 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
2371 | * At the moment, this is a cloned configuration across all heads with |
2372 | * a new framebuffer object as the backing store. | |
2373 | * | |
207fd329 DV |
2374 | * Note that this also registers the fbdev and so allows userspace to call into |
2375 | * the driver through the fbdev interfaces. | |
2376 | * | |
6806cdf9 DV |
2377 | * This function will call down into the &drm_fb_helper_funcs.fb_probe callback |
2378 | * to let the driver allocate and initialize the fbdev info structure and the | |
2379 | * drm framebuffer used to back the fbdev. drm_fb_helper_fill_var() and | |
207fd329 DV |
2380 | * drm_fb_helper_fill_fix() are provided as helpers to setup simple default |
2381 | * values for the fbdev info structure. | |
2382 | * | |
40f8cf4b DV |
2383 | * HANG DEBUGGING: |
2384 | * | |
2385 | * When you have fbcon support built-in or already loaded, this function will do | |
2386 | * a full modeset to setup the fbdev console. Due to locking misdesign in the | |
2387 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding | |
2388 | * console_lock. Until console_unlock is called no dmesg lines will be sent out | |
2389 | * to consoles, not even serial console. This means when your driver crashes, | |
2390 | * you will see absolutely nothing else but a system stuck in this function, | |
2391 | * with no further output. Any kind of printk() you place within your own driver | |
2392 | * or in the drm core modeset code will also never show up. | |
2393 | * | |
2394 | * Standard debug practice is to run the fbcon setup without taking the | |
2395 | * console_lock as a hack, to be able to see backtraces and crashes on the | |
2396 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel | |
2397 | * cmdline option. | |
2398 | * | |
2399 | * The other option is to just disable fbdev emulation since very likely the | |
af509d38 L |
2400 | * first modeset from userspace will crash in the same way, and is even easier |
2401 | * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 | |
40f8cf4b DV |
2402 | * kernel cmdline option. |
2403 | * | |
38651674 DA |
2404 | * RETURNS: |
2405 | * Zero if everything went ok, nonzero otherwise. | |
2406 | */ | |
01934c2a | 2407 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 2408 | { |
8be48d92 | 2409 | struct drm_device *dev = fb_helper->dev; |
966a6a13 | 2410 | struct fb_info *info; |
966a6a13 | 2411 | int ret; |
38651674 | 2412 | |
f64c5573 DV |
2413 | if (!drm_fbdev_emulation) |
2414 | return 0; | |
2415 | ||
e9827d8e | 2416 | mutex_lock(&fb_helper->lock); |
53f1904b | 2417 | mutex_lock(&dev->mode_config.mutex); |
64e94407 CW |
2418 | drm_setup_crtcs(fb_helper, |
2419 | dev->mode_config.max_width, | |
2420 | dev->mode_config.max_height); | |
966a6a13 CW |
2421 | ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
2422 | mutex_unlock(&dev->mode_config.mutex); | |
e9827d8e | 2423 | mutex_unlock(&fb_helper->lock); |
966a6a13 CW |
2424 | if (ret) |
2425 | return ret; | |
38651674 | 2426 | |
966a6a13 CW |
2427 | info = fb_helper->fbdev; |
2428 | info->var.pixclock = 0; | |
2429 | ret = register_framebuffer(info); | |
2430 | if (ret < 0) | |
2431 | return ret; | |
2432 | ||
2433 | dev_info(dev->dev, "fb%d: %s frame buffer device\n", | |
2434 | info->node, info->fix.id); | |
2435 | ||
a53ca635 | 2436 | mutex_lock(&kernel_fb_helper_lock); |
966a6a13 CW |
2437 | if (list_empty(&kernel_fb_helper_list)) |
2438 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
2439 | ||
2440 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
a53ca635 | 2441 | mutex_unlock(&kernel_fb_helper_lock); |
966a6a13 CW |
2442 | |
2443 | return 0; | |
38651674 | 2444 | } |
8be48d92 | 2445 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 2446 | |
7394371d CW |
2447 | /** |
2448 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 2449 | * probing all the outputs attached to the fb |
7394371d CW |
2450 | * @fb_helper: the drm_fb_helper |
2451 | * | |
7394371d | 2452 | * Scan the connectors attached to the fb_helper and try to put together a |
62cacc79 | 2453 | * setup after notification of a change in output configuration. |
7394371d | 2454 | * |
207fd329 DV |
2455 | * Called at runtime, takes the mode config locks to be able to check/change the |
2456 | * modeset configuration. Must be run from process context (which usually means | |
2457 | * either the output polling work or a work item launched from the driver's | |
2458 | * hotplug interrupt). | |
2459 | * | |
50c3dc97 | 2460 | * Note that drivers may call this even before calling |
af509d38 | 2461 | * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows |
50c3dc97 DV |
2462 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
2463 | * not miss any hotplug events. | |
207fd329 | 2464 | * |
7394371d CW |
2465 | * RETURNS: |
2466 | * 0 on success and a non-zero error code otherwise. | |
2467 | */ | |
2468 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 2469 | { |
7394371d | 2470 | struct drm_device *dev = fb_helper->dev; |
e9827d8e | 2471 | int err = 0; |
5c4426a7 | 2472 | |
f64c5573 DV |
2473 | if (!drm_fbdev_emulation) |
2474 | return 0; | |
2475 | ||
e9827d8e | 2476 | mutex_lock(&fb_helper->lock); |
50c3dc97 | 2477 | if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 2478 | fb_helper->delayed_hotplug = true; |
bdac4a05 DV |
2479 | mutex_unlock(&fb_helper->lock); |
2480 | return err; | |
4abe3520 | 2481 | } |
e9827d8e | 2482 | |
eb1f8e4f | 2483 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 2484 | |
bdac4a05 | 2485 | mutex_lock(&dev->mode_config.mutex); |
64e94407 | 2486 | drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height); |
5c4426a7 | 2487 | |
64e94407 | 2488 | mutex_unlock(&dev->mode_config.mutex); |
e9827d8e | 2489 | mutex_unlock(&fb_helper->lock); |
89ced125 | 2490 | |
2180c3c7 DV |
2491 | drm_fb_helper_set_par(fb_helper->fbdev); |
2492 | ||
2493 | return 0; | |
5c4426a7 | 2494 | } |
eb1f8e4f | 2495 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 2496 | |
6a108a14 | 2497 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
2498 | * but the module doesn't depend on any fb console symbols. At least |
2499 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
2500 | */ | |
70412cfa | 2501 | int __init drm_fb_helper_modinit(void) |
3ce05168 | 2502 | { |
70412cfa | 2503 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
06324664 | 2504 | const char name[] = "fbcon"; |
3ce05168 DF |
2505 | struct module *fbcon; |
2506 | ||
2507 | mutex_lock(&module_mutex); | |
2508 | fbcon = find_module(name); | |
2509 | mutex_unlock(&module_mutex); | |
2510 | ||
2511 | if (!fbcon) | |
2512 | request_module_nowait(name); | |
70412cfa | 2513 | #endif |
3ce05168 DF |
2514 | return 0; |
2515 | } | |
70412cfa | 2516 | EXPORT_SYMBOL(drm_fb_helper_modinit); |