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Commit | Line | Data |
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785b93ef DA |
1 | /* |
2 | * Copyright (c) 2006-2009 Red Hat Inc. | |
3 | * Copyright (c) 2006-2008 Intel Corporation | |
4 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
5 | * | |
6 | * DRM framebuffer helper functions | |
7 | * | |
8 | * Permission to use, copy, modify, distribute, and sell this software and its | |
9 | * documentation for any purpose is hereby granted without fee, provided that | |
10 | * the above copyright notice appear in all copies and that both that copyright | |
11 | * notice and this permission notice appear in supporting documentation, and | |
12 | * that the name of the copyright holders not be used in advertising or | |
13 | * publicity pertaining to distribution of the software without specific, | |
14 | * written prior permission. The copyright holders make no representations | |
15 | * about the suitability of this software for any purpose. It is provided "as | |
16 | * is" without express or implied warranty. | |
17 | * | |
18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
24 | * OF THIS SOFTWARE. | |
25 | * | |
26 | * Authors: | |
27 | * Dave Airlie <airlied@linux.ie> | |
28 | * Jesse Barnes <jesse.barnes@intel.com> | |
29 | */ | |
d56b1b9d SK |
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | ||
3b40a443 | 32 | #include <linux/kernel.h> |
785b93ef | 33 | #include <linux/sysrq.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
785b93ef | 35 | #include <linux/fb.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> | |
785b93ef | 41 | |
6fcefd56 DA |
42 | MODULE_AUTHOR("David Airlie, Jesse Barnes"); |
43 | MODULE_DESCRIPTION("DRM KMS helper"); | |
44 | MODULE_LICENSE("GPL and additional rights"); | |
45 | ||
785b93ef DA |
46 | static LIST_HEAD(kernel_fb_helper_list); |
47 | ||
d0ddc033 DV |
48 | /** |
49 | * DOC: fbdev helpers | |
50 | * | |
51 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel | |
52 | * mode setting driver. They can be used mostly independantely from the crtc | |
53 | * helper functions used by many drivers to implement the kernel mode setting | |
54 | * interfaces. | |
55 | */ | |
56 | ||
0b4c0f3f DA |
57 | /* simple single crtc case helper function */ |
58 | int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) | |
d50ba256 | 59 | { |
0b4c0f3f DA |
60 | struct drm_device *dev = fb_helper->dev; |
61 | struct drm_connector *connector; | |
62 | int i; | |
d50ba256 | 63 | |
0b4c0f3f DA |
64 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
65 | struct drm_fb_helper_connector *fb_helper_connector; | |
66 | ||
67 | fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); | |
68 | if (!fb_helper_connector) | |
69 | goto fail; | |
d50ba256 | 70 | |
0b4c0f3f DA |
71 | fb_helper_connector->connector = connector; |
72 | fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; | |
73 | } | |
d50ba256 | 74 | return 0; |
0b4c0f3f DA |
75 | fail: |
76 | for (i = 0; i < fb_helper->connector_count; i++) { | |
77 | kfree(fb_helper->connector_info[i]); | |
78 | fb_helper->connector_info[i] = NULL; | |
79 | } | |
80 | fb_helper->connector_count = 0; | |
81 | return -ENOMEM; | |
d50ba256 | 82 | } |
0b4c0f3f | 83 | EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); |
d50ba256 | 84 | |
0b4c0f3f | 85 | static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) |
d50ba256 | 86 | { |
0b4c0f3f DA |
87 | struct drm_fb_helper_connector *fb_helper_conn; |
88 | int i; | |
d50ba256 | 89 | |
0b4c0f3f | 90 | for (i = 0; i < fb_helper->connector_count; i++) { |
1794d257 CW |
91 | struct drm_cmdline_mode *mode; |
92 | struct drm_connector *connector; | |
d50ba256 DA |
93 | char *option = NULL; |
94 | ||
0b4c0f3f | 95 | fb_helper_conn = fb_helper->connector_info[i]; |
1794d257 CW |
96 | connector = fb_helper_conn->connector; |
97 | mode = &fb_helper_conn->cmdline_mode; | |
0b4c0f3f | 98 | |
d50ba256 | 99 | /* do something on return - turn off connector maybe */ |
1794d257 | 100 | if (fb_get_options(drm_get_connector_name(connector), &option)) |
d50ba256 DA |
101 | continue; |
102 | ||
1794d257 CW |
103 | if (drm_mode_parse_command_line_for_connector(option, |
104 | connector, | |
105 | mode)) { | |
106 | if (mode->force) { | |
107 | const char *s; | |
108 | switch (mode->force) { | |
6c91083f SK |
109 | case DRM_FORCE_OFF: |
110 | s = "OFF"; | |
111 | break; | |
112 | case DRM_FORCE_ON_DIGITAL: | |
113 | s = "ON - dig"; | |
114 | break; | |
1794d257 | 115 | default: |
6c91083f SK |
116 | case DRM_FORCE_ON: |
117 | s = "ON"; | |
118 | break; | |
1794d257 CW |
119 | } |
120 | ||
121 | DRM_INFO("forcing %s connector %s\n", | |
122 | drm_get_connector_name(connector), s); | |
123 | connector->force = mode->force; | |
124 | } | |
125 | ||
126 | DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", | |
127 | drm_get_connector_name(connector), | |
128 | mode->xres, mode->yres, | |
129 | mode->refresh_specified ? mode->refresh : 60, | |
130 | mode->rb ? " reduced blanking" : "", | |
131 | mode->margins ? " with margins" : "", | |
132 | mode->interlace ? " interlaced" : ""); | |
133 | } | |
134 | ||
d50ba256 DA |
135 | } |
136 | return 0; | |
137 | } | |
138 | ||
99231028 JW |
139 | static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) |
140 | { | |
141 | uint16_t *r_base, *g_base, *b_base; | |
142 | int i; | |
143 | ||
144 | r_base = crtc->gamma_store; | |
145 | g_base = r_base + crtc->gamma_size; | |
146 | b_base = g_base + crtc->gamma_size; | |
147 | ||
148 | for (i = 0; i < crtc->gamma_size; i++) | |
149 | helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); | |
150 | } | |
151 | ||
152 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) | |
153 | { | |
154 | uint16_t *r_base, *g_base, *b_base; | |
155 | ||
ebe0f244 LP |
156 | if (crtc->funcs->gamma_set == NULL) |
157 | return; | |
158 | ||
99231028 JW |
159 | r_base = crtc->gamma_store; |
160 | g_base = r_base + crtc->gamma_size; | |
161 | b_base = g_base + crtc->gamma_size; | |
162 | ||
163 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); | |
164 | } | |
165 | ||
1a7aba7f JB |
166 | int drm_fb_helper_debug_enter(struct fb_info *info) |
167 | { | |
168 | struct drm_fb_helper *helper = info->par; | |
169 | struct drm_crtc_helper_funcs *funcs; | |
170 | int i; | |
171 | ||
172 | if (list_empty(&kernel_fb_helper_list)) | |
173 | return false; | |
174 | ||
175 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
176 | for (i = 0; i < helper->crtc_count; i++) { | |
177 | struct drm_mode_set *mode_set = | |
178 | &helper->crtc_info[i].mode_set; | |
179 | ||
180 | if (!mode_set->crtc->enabled) | |
181 | continue; | |
182 | ||
183 | funcs = mode_set->crtc->helper_private; | |
99231028 | 184 | drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); |
1a7aba7f JB |
185 | funcs->mode_set_base_atomic(mode_set->crtc, |
186 | mode_set->fb, | |
187 | mode_set->x, | |
413d45d3 | 188 | mode_set->y, |
21c74a8e | 189 | ENTER_ATOMIC_MODE_SET); |
1a7aba7f JB |
190 | } |
191 | } | |
192 | ||
193 | return 0; | |
194 | } | |
195 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); | |
196 | ||
197 | /* Find the real fb for a given fb helper CRTC */ | |
198 | static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) | |
199 | { | |
200 | struct drm_device *dev = crtc->dev; | |
201 | struct drm_crtc *c; | |
202 | ||
203 | list_for_each_entry(c, &dev->mode_config.crtc_list, head) { | |
204 | if (crtc->base.id == c->base.id) | |
205 | return c->fb; | |
206 | } | |
207 | ||
208 | return NULL; | |
209 | } | |
210 | ||
211 | int drm_fb_helper_debug_leave(struct fb_info *info) | |
212 | { | |
213 | struct drm_fb_helper *helper = info->par; | |
214 | struct drm_crtc *crtc; | |
215 | struct drm_crtc_helper_funcs *funcs; | |
216 | struct drm_framebuffer *fb; | |
217 | int i; | |
218 | ||
219 | for (i = 0; i < helper->crtc_count; i++) { | |
220 | struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; | |
221 | crtc = mode_set->crtc; | |
222 | funcs = crtc->helper_private; | |
223 | fb = drm_mode_config_fb(crtc); | |
224 | ||
225 | if (!crtc->enabled) | |
226 | continue; | |
227 | ||
228 | if (!fb) { | |
229 | DRM_ERROR("no fb to restore??\n"); | |
230 | continue; | |
231 | } | |
232 | ||
99231028 | 233 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
1a7aba7f | 234 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
21c74a8e | 235 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
1a7aba7f JB |
236 | } |
237 | ||
238 | return 0; | |
239 | } | |
240 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); | |
241 | ||
6aed8ec3 DV |
242 | /** |
243 | * drm_fb_helper_restore_fbdev_mode - restore fbdev configuration | |
244 | * @fb_helper: fbcon to restore | |
245 | * | |
246 | * This should be called from driver's drm->lastclose callback when implementing | |
247 | * an fbcon on top of kms using this helper. This ensures that the user isn't | |
248 | * greeted with a black screen when e.g. X dies. | |
249 | */ | |
e8e7a2b8 DA |
250 | bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) |
251 | { | |
252 | bool error = false; | |
253 | int i, ret; | |
6aed8ec3 DV |
254 | |
255 | drm_warn_on_modeset_not_all_locked(fb_helper->dev); | |
256 | ||
e8e7a2b8 DA |
257 | for (i = 0; i < fb_helper->crtc_count; i++) { |
258 | struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; | |
2d13b679 | 259 | ret = drm_mode_set_config_internal(mode_set); |
e8e7a2b8 DA |
260 | if (ret) |
261 | error = true; | |
262 | } | |
263 | return error; | |
264 | } | |
265 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode); | |
266 | ||
d21bf469 DV |
267 | /* |
268 | * restore fbcon display for all kms driver's using this helper, used for sysrq | |
269 | * and panic handling. | |
270 | */ | |
78b9c353 | 271 | static bool drm_fb_helper_force_kernel_mode(void) |
785b93ef | 272 | { |
785b93ef DA |
273 | bool ret, error = false; |
274 | struct drm_fb_helper *helper; | |
275 | ||
276 | if (list_empty(&kernel_fb_helper_list)) | |
277 | return false; | |
278 | ||
279 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { | |
e8e7a2b8 DA |
280 | if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF) |
281 | continue; | |
282 | ||
283 | ret = drm_fb_helper_restore_fbdev_mode(helper); | |
284 | if (ret) | |
285 | error = true; | |
785b93ef DA |
286 | } |
287 | return error; | |
288 | } | |
289 | ||
43c8a849 | 290 | static int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, |
785b93ef DA |
291 | void *panic_str) |
292 | { | |
d68752cf HD |
293 | /* |
294 | * It's a waste of time and effort to switch back to text console | |
295 | * if the kernel should reboot before panic messages can be seen. | |
296 | */ | |
297 | if (panic_timeout < 0) | |
298 | return 0; | |
299 | ||
d56b1b9d | 300 | pr_err("panic occurred, switching back to text console\n"); |
785b93ef | 301 | return drm_fb_helper_force_kernel_mode(); |
785b93ef | 302 | } |
785b93ef DA |
303 | |
304 | static struct notifier_block paniced = { | |
305 | .notifier_call = drm_fb_helper_panic, | |
306 | }; | |
307 | ||
20c60c35 DV |
308 | static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) |
309 | { | |
310 | struct drm_device *dev = fb_helper->dev; | |
311 | struct drm_crtc *crtc; | |
312 | int bound = 0, crtcs_bound = 0; | |
313 | ||
314 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
315 | if (crtc->fb) | |
316 | crtcs_bound++; | |
317 | if (crtc->fb == fb_helper->fb) | |
318 | bound++; | |
319 | } | |
320 | ||
321 | if (bound < crtcs_bound) | |
322 | return false; | |
323 | return true; | |
324 | } | |
325 | ||
bea1d35b | 326 | #ifdef CONFIG_MAGIC_SYSRQ |
785b93ef DA |
327 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
328 | { | |
d21bf469 DV |
329 | bool ret; |
330 | ret = drm_fb_helper_force_kernel_mode(); | |
331 | if (ret == true) | |
332 | DRM_ERROR("Failed to restore crtc configuration\n"); | |
785b93ef DA |
333 | } |
334 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); | |
335 | ||
1495cc9d | 336 | static void drm_fb_helper_sysrq(int dummy1) |
785b93ef DA |
337 | { |
338 | schedule_work(&drm_fb_helper_restore_work); | |
339 | } | |
340 | ||
341 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { | |
342 | .handler = drm_fb_helper_sysrq, | |
343 | .help_msg = "force-fb(V)", | |
344 | .action_msg = "Restore framebuffer console", | |
345 | }; | |
b8c40d62 RD |
346 | #else |
347 | static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; | |
bea1d35b | 348 | #endif |
785b93ef | 349 | |
3a8148c5 | 350 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
785b93ef DA |
351 | { |
352 | struct drm_fb_helper *fb_helper = info->par; | |
353 | struct drm_device *dev = fb_helper->dev; | |
354 | struct drm_crtc *crtc; | |
023eb571 | 355 | struct drm_connector *connector; |
023eb571 | 356 | int i, j; |
785b93ef DA |
357 | |
358 | /* | |
3a8148c5 | 359 | * For each CRTC in this fb, turn the connectors on/off. |
785b93ef | 360 | */ |
84849903 | 361 | drm_modeset_lock_all(dev); |
20c60c35 DV |
362 | if (!drm_fb_helper_is_bound(fb_helper)) { |
363 | drm_modeset_unlock_all(dev); | |
364 | return; | |
365 | } | |
366 | ||
e87b2c42 | 367 | for (i = 0; i < fb_helper->crtc_count; i++) { |
8be48d92 | 368 | crtc = fb_helper->crtc_info[i].mode_set.crtc; |
785b93ef | 369 | |
8be48d92 DA |
370 | if (!crtc->enabled) |
371 | continue; | |
372 | ||
3a8148c5 | 373 | /* Walk the connectors & encoders on this fb turning them on/off */ |
023eb571 JB |
374 | for (j = 0; j < fb_helper->connector_count; j++) { |
375 | connector = fb_helper->connector_info[j]->connector; | |
e04190e0 | 376 | connector->funcs->dpms(connector, dpms_mode); |
58495563 | 377 | drm_object_property_set_value(&connector->base, |
3a8148c5 | 378 | dev->mode_config.dpms_property, dpms_mode); |
785b93ef | 379 | } |
785b93ef | 380 | } |
84849903 | 381 | drm_modeset_unlock_all(dev); |
785b93ef DA |
382 | } |
383 | ||
384 | int drm_fb_helper_blank(int blank, struct fb_info *info) | |
385 | { | |
386 | switch (blank) { | |
731b5a15 | 387 | /* Display: On; HSync: On, VSync: On */ |
785b93ef | 388 | case FB_BLANK_UNBLANK: |
3a8148c5 | 389 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); |
785b93ef | 390 | break; |
731b5a15 | 391 | /* Display: Off; HSync: On, VSync: On */ |
785b93ef | 392 | case FB_BLANK_NORMAL: |
3a8148c5 | 393 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 394 | break; |
731b5a15 | 395 | /* Display: Off; HSync: Off, VSync: On */ |
785b93ef | 396 | case FB_BLANK_HSYNC_SUSPEND: |
3a8148c5 | 397 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); |
785b93ef | 398 | break; |
731b5a15 | 399 | /* Display: Off; HSync: On, VSync: Off */ |
785b93ef | 400 | case FB_BLANK_VSYNC_SUSPEND: |
3a8148c5 | 401 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); |
785b93ef | 402 | break; |
731b5a15 | 403 | /* Display: Off; HSync: Off, VSync: Off */ |
785b93ef | 404 | case FB_BLANK_POWERDOWN: |
3a8148c5 | 405 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); |
785b93ef DA |
406 | break; |
407 | } | |
408 | return 0; | |
409 | } | |
410 | EXPORT_SYMBOL(drm_fb_helper_blank); | |
411 | ||
412 | static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) | |
413 | { | |
414 | int i; | |
415 | ||
0b4c0f3f DA |
416 | for (i = 0; i < helper->connector_count; i++) |
417 | kfree(helper->connector_info[i]); | |
418 | kfree(helper->connector_info); | |
a1b7736d | 419 | for (i = 0; i < helper->crtc_count; i++) { |
785b93ef | 420 | kfree(helper->crtc_info[i].mode_set.connectors); |
a1b7736d SH |
421 | if (helper->crtc_info[i].mode_set.mode) |
422 | drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); | |
423 | } | |
785b93ef DA |
424 | kfree(helper->crtc_info); |
425 | } | |
426 | ||
4abe3520 DA |
427 | int drm_fb_helper_init(struct drm_device *dev, |
428 | struct drm_fb_helper *fb_helper, | |
eb1f8e4f | 429 | int crtc_count, int max_conn_count) |
785b93ef | 430 | { |
785b93ef | 431 | struct drm_crtc *crtc; |
785b93ef DA |
432 | int i; |
433 | ||
4abe3520 | 434 | fb_helper->dev = dev; |
4abe3520 DA |
435 | |
436 | INIT_LIST_HEAD(&fb_helper->kernel_fb_list); | |
437 | ||
438 | fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); | |
439 | if (!fb_helper->crtc_info) | |
785b93ef DA |
440 | return -ENOMEM; |
441 | ||
4abe3520 DA |
442 | fb_helper->crtc_count = crtc_count; |
443 | fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); | |
444 | if (!fb_helper->connector_info) { | |
445 | kfree(fb_helper->crtc_info); | |
0b4c0f3f DA |
446 | return -ENOMEM; |
447 | } | |
4abe3520 | 448 | fb_helper->connector_count = 0; |
785b93ef DA |
449 | |
450 | for (i = 0; i < crtc_count; i++) { | |
4abe3520 | 451 | fb_helper->crtc_info[i].mode_set.connectors = |
785b93ef DA |
452 | kcalloc(max_conn_count, |
453 | sizeof(struct drm_connector *), | |
454 | GFP_KERNEL); | |
455 | ||
4a1b0714 | 456 | if (!fb_helper->crtc_info[i].mode_set.connectors) |
785b93ef | 457 | goto out_free; |
4abe3520 | 458 | fb_helper->crtc_info[i].mode_set.num_connectors = 0; |
785b93ef DA |
459 | } |
460 | ||
461 | i = 0; | |
462 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
4abe3520 | 463 | fb_helper->crtc_info[i].mode_set.crtc = crtc; |
785b93ef DA |
464 | i++; |
465 | } | |
e9ad3181 | 466 | |
785b93ef DA |
467 | return 0; |
468 | out_free: | |
4abe3520 | 469 | drm_fb_helper_crtc_free(fb_helper); |
785b93ef DA |
470 | return -ENOMEM; |
471 | } | |
4abe3520 DA |
472 | EXPORT_SYMBOL(drm_fb_helper_init); |
473 | ||
474 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) | |
475 | { | |
476 | if (!list_empty(&fb_helper->kernel_fb_list)) { | |
477 | list_del(&fb_helper->kernel_fb_list); | |
478 | if (list_empty(&kernel_fb_helper_list)) { | |
d56b1b9d | 479 | pr_info("drm: unregistered panic notifier\n"); |
4abe3520 DA |
480 | atomic_notifier_chain_unregister(&panic_notifier_list, |
481 | &paniced); | |
482 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
483 | } | |
484 | } | |
485 | ||
486 | drm_fb_helper_crtc_free(fb_helper); | |
487 | ||
4abe3520 DA |
488 | } |
489 | EXPORT_SYMBOL(drm_fb_helper_fini); | |
785b93ef | 490 | |
c850cb78 | 491 | static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, |
b8c00ac5 DA |
492 | u16 blue, u16 regno, struct fb_info *info) |
493 | { | |
494 | struct drm_fb_helper *fb_helper = info->par; | |
495 | struct drm_framebuffer *fb = fb_helper->fb; | |
496 | int pindex; | |
497 | ||
c850cb78 DA |
498 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { |
499 | u32 *palette; | |
500 | u32 value; | |
501 | /* place color in psuedopalette */ | |
502 | if (regno > 16) | |
503 | return -EINVAL; | |
504 | palette = (u32 *)info->pseudo_palette; | |
505 | red >>= (16 - info->var.red.length); | |
506 | green >>= (16 - info->var.green.length); | |
507 | blue >>= (16 - info->var.blue.length); | |
508 | value = (red << info->var.red.offset) | | |
509 | (green << info->var.green.offset) | | |
510 | (blue << info->var.blue.offset); | |
9da12b6a RC |
511 | if (info->var.transp.length > 0) { |
512 | u32 mask = (1 << info->var.transp.length) - 1; | |
513 | mask <<= info->var.transp.offset; | |
514 | value |= mask; | |
515 | } | |
c850cb78 DA |
516 | palette[regno] = value; |
517 | return 0; | |
518 | } | |
519 | ||
b8c00ac5 DA |
520 | pindex = regno; |
521 | ||
522 | if (fb->bits_per_pixel == 16) { | |
523 | pindex = regno << 3; | |
524 | ||
525 | if (fb->depth == 16 && regno > 63) | |
c850cb78 | 526 | return -EINVAL; |
b8c00ac5 | 527 | if (fb->depth == 15 && regno > 31) |
c850cb78 | 528 | return -EINVAL; |
b8c00ac5 DA |
529 | |
530 | if (fb->depth == 16) { | |
531 | u16 r, g, b; | |
532 | int i; | |
533 | if (regno < 32) { | |
534 | for (i = 0; i < 8; i++) | |
535 | fb_helper->funcs->gamma_set(crtc, red, | |
536 | green, blue, pindex + i); | |
537 | } | |
538 | ||
539 | fb_helper->funcs->gamma_get(crtc, &r, | |
540 | &g, &b, | |
541 | pindex >> 1); | |
542 | ||
543 | for (i = 0; i < 4; i++) | |
544 | fb_helper->funcs->gamma_set(crtc, r, | |
545 | green, b, | |
546 | (pindex >> 1) + i); | |
547 | } | |
548 | } | |
549 | ||
550 | if (fb->depth != 16) | |
551 | fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); | |
c850cb78 | 552 | return 0; |
b8c00ac5 DA |
553 | } |
554 | ||
068143d3 DA |
555 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
556 | { | |
557 | struct drm_fb_helper *fb_helper = info->par; | |
8be48d92 | 558 | struct drm_crtc_helper_funcs *crtc_funcs; |
068143d3 DA |
559 | u16 *red, *green, *blue, *transp; |
560 | struct drm_crtc *crtc; | |
062ac622 | 561 | int i, j, rc = 0; |
068143d3 DA |
562 | int start; |
563 | ||
8be48d92 DA |
564 | for (i = 0; i < fb_helper->crtc_count; i++) { |
565 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
566 | crtc_funcs = crtc->helper_private; | |
068143d3 DA |
567 | |
568 | red = cmap->red; | |
569 | green = cmap->green; | |
570 | blue = cmap->blue; | |
571 | transp = cmap->transp; | |
572 | start = cmap->start; | |
573 | ||
062ac622 | 574 | for (j = 0; j < cmap->len; j++) { |
068143d3 DA |
575 | u16 hred, hgreen, hblue, htransp = 0xffff; |
576 | ||
577 | hred = *red++; | |
578 | hgreen = *green++; | |
579 | hblue = *blue++; | |
580 | ||
581 | if (transp) | |
582 | htransp = *transp++; | |
583 | ||
c850cb78 DA |
584 | rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); |
585 | if (rc) | |
586 | return rc; | |
068143d3 DA |
587 | } |
588 | crtc_funcs->load_lut(crtc); | |
589 | } | |
590 | return rc; | |
591 | } | |
592 | EXPORT_SYMBOL(drm_fb_helper_setcmap); | |
593 | ||
785b93ef DA |
594 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
595 | struct fb_info *info) | |
596 | { | |
597 | struct drm_fb_helper *fb_helper = info->par; | |
598 | struct drm_framebuffer *fb = fb_helper->fb; | |
599 | int depth; | |
600 | ||
f90ebd9e | 601 | if (var->pixclock != 0 || in_dbg_master()) |
785b93ef DA |
602 | return -EINVAL; |
603 | ||
604 | /* Need to resize the fb object !!! */ | |
62fb376e CW |
605 | if (var->bits_per_pixel > fb->bits_per_pixel || |
606 | var->xres > fb->width || var->yres > fb->height || | |
607 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { | |
509c7d83 | 608 | DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " |
62fb376e CW |
609 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", |
610 | var->xres, var->yres, var->bits_per_pixel, | |
611 | var->xres_virtual, var->yres_virtual, | |
509c7d83 | 612 | fb->width, fb->height, fb->bits_per_pixel); |
785b93ef DA |
613 | return -EINVAL; |
614 | } | |
615 | ||
616 | switch (var->bits_per_pixel) { | |
617 | case 16: | |
618 | depth = (var->green.length == 6) ? 16 : 15; | |
619 | break; | |
620 | case 32: | |
621 | depth = (var->transp.length > 0) ? 32 : 24; | |
622 | break; | |
623 | default: | |
624 | depth = var->bits_per_pixel; | |
625 | break; | |
626 | } | |
627 | ||
628 | switch (depth) { | |
629 | case 8: | |
630 | var->red.offset = 0; | |
631 | var->green.offset = 0; | |
632 | var->blue.offset = 0; | |
633 | var->red.length = 8; | |
634 | var->green.length = 8; | |
635 | var->blue.length = 8; | |
636 | var->transp.length = 0; | |
637 | var->transp.offset = 0; | |
638 | break; | |
639 | case 15: | |
640 | var->red.offset = 10; | |
641 | var->green.offset = 5; | |
642 | var->blue.offset = 0; | |
643 | var->red.length = 5; | |
644 | var->green.length = 5; | |
645 | var->blue.length = 5; | |
646 | var->transp.length = 1; | |
647 | var->transp.offset = 15; | |
648 | break; | |
649 | case 16: | |
650 | var->red.offset = 11; | |
651 | var->green.offset = 5; | |
652 | var->blue.offset = 0; | |
653 | var->red.length = 5; | |
654 | var->green.length = 6; | |
655 | var->blue.length = 5; | |
656 | var->transp.length = 0; | |
657 | var->transp.offset = 0; | |
658 | break; | |
659 | case 24: | |
660 | var->red.offset = 16; | |
661 | var->green.offset = 8; | |
662 | var->blue.offset = 0; | |
663 | var->red.length = 8; | |
664 | var->green.length = 8; | |
665 | var->blue.length = 8; | |
666 | var->transp.length = 0; | |
667 | var->transp.offset = 0; | |
668 | break; | |
669 | case 32: | |
670 | var->red.offset = 16; | |
671 | var->green.offset = 8; | |
672 | var->blue.offset = 0; | |
673 | var->red.length = 8; | |
674 | var->green.length = 8; | |
675 | var->blue.length = 8; | |
676 | var->transp.length = 8; | |
677 | var->transp.offset = 24; | |
678 | break; | |
679 | default: | |
680 | return -EINVAL; | |
681 | } | |
682 | return 0; | |
683 | } | |
684 | EXPORT_SYMBOL(drm_fb_helper_check_var); | |
685 | ||
686 | /* this will let fbcon do the mode init */ | |
687 | int drm_fb_helper_set_par(struct fb_info *info) | |
688 | { | |
689 | struct drm_fb_helper *fb_helper = info->par; | |
690 | struct drm_device *dev = fb_helper->dev; | |
691 | struct fb_var_screeninfo *var = &info->var; | |
785b93ef DA |
692 | int ret; |
693 | int i; | |
694 | ||
5349ef31 | 695 | if (var->pixclock != 0) { |
172e91f5 | 696 | DRM_ERROR("PIXEL CLOCK SET\n"); |
785b93ef DA |
697 | return -EINVAL; |
698 | } | |
699 | ||
84849903 | 700 | drm_modeset_lock_all(dev); |
8be48d92 | 701 | for (i = 0; i < fb_helper->crtc_count; i++) { |
2d13b679 | 702 | ret = drm_mode_set_config_internal(&fb_helper->crtc_info[i].mode_set); |
0b4c0f3f | 703 | if (ret) { |
84849903 | 704 | drm_modeset_unlock_all(dev); |
0b4c0f3f | 705 | return ret; |
785b93ef DA |
706 | } |
707 | } | |
84849903 | 708 | drm_modeset_unlock_all(dev); |
4abe3520 DA |
709 | |
710 | if (fb_helper->delayed_hotplug) { | |
711 | fb_helper->delayed_hotplug = false; | |
eb1f8e4f | 712 | drm_fb_helper_hotplug_event(fb_helper); |
4abe3520 | 713 | } |
785b93ef DA |
714 | return 0; |
715 | } | |
716 | EXPORT_SYMBOL(drm_fb_helper_set_par); | |
717 | ||
718 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, | |
719 | struct fb_info *info) | |
720 | { | |
721 | struct drm_fb_helper *fb_helper = info->par; | |
722 | struct drm_device *dev = fb_helper->dev; | |
723 | struct drm_mode_set *modeset; | |
724 | struct drm_crtc *crtc; | |
725 | int ret = 0; | |
726 | int i; | |
727 | ||
84849903 | 728 | drm_modeset_lock_all(dev); |
20c60c35 DV |
729 | if (!drm_fb_helper_is_bound(fb_helper)) { |
730 | drm_modeset_unlock_all(dev); | |
731 | return -EBUSY; | |
732 | } | |
733 | ||
8be48d92 DA |
734 | for (i = 0; i < fb_helper->crtc_count; i++) { |
735 | crtc = fb_helper->crtc_info[i].mode_set.crtc; | |
785b93ef DA |
736 | |
737 | modeset = &fb_helper->crtc_info[i].mode_set; | |
738 | ||
739 | modeset->x = var->xoffset; | |
740 | modeset->y = var->yoffset; | |
741 | ||
742 | if (modeset->num_connectors) { | |
2d13b679 | 743 | ret = drm_mode_set_config_internal(modeset); |
785b93ef DA |
744 | if (!ret) { |
745 | info->var.xoffset = var->xoffset; | |
746 | info->var.yoffset = var->yoffset; | |
747 | } | |
748 | } | |
749 | } | |
84849903 | 750 | drm_modeset_unlock_all(dev); |
785b93ef DA |
751 | return ret; |
752 | } | |
753 | EXPORT_SYMBOL(drm_fb_helper_pan_display); | |
754 | ||
de1ace5b DV |
755 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
756 | int preferred_bpp) | |
785b93ef | 757 | { |
785b93ef DA |
758 | int new_fb = 0; |
759 | int crtc_count = 0; | |
4abe3520 | 760 | int i; |
785b93ef | 761 | struct fb_info *info; |
38651674 | 762 | struct drm_fb_helper_surface_size sizes; |
8be48d92 | 763 | int gamma_size = 0; |
38651674 DA |
764 | |
765 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); | |
766 | sizes.surface_depth = 24; | |
767 | sizes.surface_bpp = 32; | |
768 | sizes.fb_width = (unsigned)-1; | |
769 | sizes.fb_height = (unsigned)-1; | |
785b93ef | 770 | |
b8c00ac5 DA |
771 | /* if driver picks 8 or 16 by default use that |
772 | for both depth/bpp */ | |
96081cdf | 773 | if (preferred_bpp != sizes.surface_bpp) |
38651674 | 774 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
96081cdf | 775 | |
785b93ef | 776 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
0b4c0f3f DA |
777 | for (i = 0; i < fb_helper->connector_count; i++) { |
778 | struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; | |
1794d257 | 779 | struct drm_cmdline_mode *cmdline_mode; |
8ef8678c | 780 | |
0b4c0f3f | 781 | cmdline_mode = &fb_helper_conn->cmdline_mode; |
d50ba256 DA |
782 | |
783 | if (cmdline_mode->bpp_specified) { | |
784 | switch (cmdline_mode->bpp) { | |
785 | case 8: | |
38651674 | 786 | sizes.surface_depth = sizes.surface_bpp = 8; |
d50ba256 DA |
787 | break; |
788 | case 15: | |
38651674 DA |
789 | sizes.surface_depth = 15; |
790 | sizes.surface_bpp = 16; | |
d50ba256 DA |
791 | break; |
792 | case 16: | |
38651674 | 793 | sizes.surface_depth = sizes.surface_bpp = 16; |
d50ba256 DA |
794 | break; |
795 | case 24: | |
38651674 | 796 | sizes.surface_depth = sizes.surface_bpp = 24; |
d50ba256 DA |
797 | break; |
798 | case 32: | |
38651674 DA |
799 | sizes.surface_depth = 24; |
800 | sizes.surface_bpp = 32; | |
d50ba256 DA |
801 | break; |
802 | } | |
803 | break; | |
804 | } | |
805 | } | |
806 | ||
8be48d92 DA |
807 | crtc_count = 0; |
808 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
809 | struct drm_display_mode *desired_mode; | |
810 | desired_mode = fb_helper->crtc_info[i].desired_mode; | |
811 | ||
812 | if (desired_mode) { | |
813 | if (gamma_size == 0) | |
814 | gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; | |
815 | if (desired_mode->hdisplay < sizes.fb_width) | |
816 | sizes.fb_width = desired_mode->hdisplay; | |
817 | if (desired_mode->vdisplay < sizes.fb_height) | |
818 | sizes.fb_height = desired_mode->vdisplay; | |
819 | if (desired_mode->hdisplay > sizes.surface_width) | |
820 | sizes.surface_width = desired_mode->hdisplay; | |
821 | if (desired_mode->vdisplay > sizes.surface_height) | |
822 | sizes.surface_height = desired_mode->vdisplay; | |
785b93ef DA |
823 | crtc_count++; |
824 | } | |
825 | } | |
826 | ||
38651674 | 827 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
785b93ef DA |
828 | /* hmm everyone went away - assume VGA cable just fell out |
829 | and will come back later. */ | |
eb1f8e4f | 830 | DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); |
19b4b445 DA |
831 | sizes.fb_width = sizes.surface_width = 1024; |
832 | sizes.fb_height = sizes.surface_height = 768; | |
785b93ef DA |
833 | } |
834 | ||
38651674 | 835 | /* push down into drivers */ |
4abe3520 | 836 | new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
38651674 DA |
837 | if (new_fb < 0) |
838 | return new_fb; | |
785b93ef | 839 | |
38651674 | 840 | info = fb_helper->fbdev; |
785b93ef | 841 | |
7e53f3a4 DV |
842 | /* |
843 | * Set the fb pointer - usually drm_setup_crtcs does this for hotplug | |
844 | * events, but at init time drm_setup_crtcs needs to be called before | |
845 | * the fb is allocated (since we need to figure out the desired size of | |
846 | * the fb before we can allocate it ...). Hence we need to fix things up | |
847 | * here again. | |
848 | */ | |
96081cdf | 849 | for (i = 0; i < fb_helper->crtc_count; i++) |
7e53f3a4 DV |
850 | if (fb_helper->crtc_info[i].mode_set.num_connectors) |
851 | fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; | |
852 | ||
785b93ef DA |
853 | |
854 | if (new_fb) { | |
5349ef31 | 855 | info->var.pixclock = 0; |
96081cdf | 856 | if (register_framebuffer(info) < 0) |
785b93ef | 857 | return -EINVAL; |
38651674 | 858 | |
d56b1b9d SK |
859 | dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", |
860 | info->node, info->fix.id); | |
38651674 | 861 | |
785b93ef DA |
862 | } else { |
863 | drm_fb_helper_set_par(info); | |
864 | } | |
785b93ef DA |
865 | |
866 | /* Switch back to kernel console on panic */ | |
867 | /* multi card linked list maybe */ | |
868 | if (list_empty(&kernel_fb_helper_list)) { | |
d56b1b9d | 869 | dev_info(fb_helper->dev->dev, "registered panic notifier\n"); |
785b93ef DA |
870 | atomic_notifier_chain_register(&panic_notifier_list, |
871 | &paniced); | |
872 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); | |
873 | } | |
38651674 DA |
874 | if (new_fb) |
875 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); | |
876 | ||
785b93ef DA |
877 | return 0; |
878 | } | |
785b93ef | 879 | |
3632ef89 DA |
880 | void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
881 | uint32_t depth) | |
882 | { | |
883 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
884 | info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : | |
885 | FB_VISUAL_TRUECOLOR; | |
886 | info->fix.mmio_start = 0; | |
887 | info->fix.mmio_len = 0; | |
888 | info->fix.type_aux = 0; | |
889 | info->fix.xpanstep = 1; /* doing it in hw */ | |
890 | info->fix.ypanstep = 1; /* doing it in hw */ | |
891 | info->fix.ywrapstep = 0; | |
892 | info->fix.accel = FB_ACCEL_NONE; | |
893 | info->fix.type_aux = 0; | |
894 | ||
895 | info->fix.line_length = pitch; | |
896 | return; | |
897 | } | |
898 | EXPORT_SYMBOL(drm_fb_helper_fill_fix); | |
899 | ||
38651674 | 900 | void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, |
785b93ef DA |
901 | uint32_t fb_width, uint32_t fb_height) |
902 | { | |
38651674 DA |
903 | struct drm_framebuffer *fb = fb_helper->fb; |
904 | info->pseudo_palette = fb_helper->pseudo_palette; | |
785b93ef DA |
905 | info->var.xres_virtual = fb->width; |
906 | info->var.yres_virtual = fb->height; | |
907 | info->var.bits_per_pixel = fb->bits_per_pixel; | |
57084d05 | 908 | info->var.accel_flags = FB_ACCELF_TEXT; |
785b93ef DA |
909 | info->var.xoffset = 0; |
910 | info->var.yoffset = 0; | |
911 | info->var.activate = FB_ACTIVATE_NOW; | |
912 | info->var.height = -1; | |
913 | info->var.width = -1; | |
914 | ||
915 | switch (fb->depth) { | |
916 | case 8: | |
917 | info->var.red.offset = 0; | |
918 | info->var.green.offset = 0; | |
919 | info->var.blue.offset = 0; | |
920 | info->var.red.length = 8; /* 8bit DAC */ | |
921 | info->var.green.length = 8; | |
922 | info->var.blue.length = 8; | |
923 | info->var.transp.offset = 0; | |
924 | info->var.transp.length = 0; | |
925 | break; | |
926 | case 15: | |
927 | info->var.red.offset = 10; | |
928 | info->var.green.offset = 5; | |
929 | info->var.blue.offset = 0; | |
930 | info->var.red.length = 5; | |
931 | info->var.green.length = 5; | |
932 | info->var.blue.length = 5; | |
933 | info->var.transp.offset = 15; | |
934 | info->var.transp.length = 1; | |
935 | break; | |
936 | case 16: | |
937 | info->var.red.offset = 11; | |
938 | info->var.green.offset = 5; | |
939 | info->var.blue.offset = 0; | |
940 | info->var.red.length = 5; | |
941 | info->var.green.length = 6; | |
942 | info->var.blue.length = 5; | |
943 | info->var.transp.offset = 0; | |
944 | break; | |
945 | case 24: | |
946 | info->var.red.offset = 16; | |
947 | info->var.green.offset = 8; | |
948 | info->var.blue.offset = 0; | |
949 | info->var.red.length = 8; | |
950 | info->var.green.length = 8; | |
951 | info->var.blue.length = 8; | |
952 | info->var.transp.offset = 0; | |
953 | info->var.transp.length = 0; | |
954 | break; | |
955 | case 32: | |
956 | info->var.red.offset = 16; | |
957 | info->var.green.offset = 8; | |
958 | info->var.blue.offset = 0; | |
959 | info->var.red.length = 8; | |
960 | info->var.green.length = 8; | |
961 | info->var.blue.length = 8; | |
962 | info->var.transp.offset = 24; | |
963 | info->var.transp.length = 8; | |
964 | break; | |
965 | default: | |
966 | break; | |
967 | } | |
968 | ||
969 | info->var.xres = fb_width; | |
970 | info->var.yres = fb_height; | |
971 | } | |
972 | EXPORT_SYMBOL(drm_fb_helper_fill_var); | |
38651674 | 973 | |
0b4c0f3f DA |
974 | static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, |
975 | uint32_t maxX, | |
976 | uint32_t maxY) | |
38651674 DA |
977 | { |
978 | struct drm_connector *connector; | |
979 | int count = 0; | |
0b4c0f3f | 980 | int i; |
38651674 | 981 | |
0b4c0f3f DA |
982 | for (i = 0; i < fb_helper->connector_count; i++) { |
983 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
984 | count += connector->funcs->fill_modes(connector, maxX, maxY); |
985 | } | |
986 | ||
987 | return count; | |
988 | } | |
989 | ||
0b4c0f3f | 990 | static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) |
38651674 DA |
991 | { |
992 | struct drm_display_mode *mode; | |
993 | ||
0b4c0f3f | 994 | list_for_each_entry(mode, &fb_connector->connector->modes, head) { |
38651674 DA |
995 | if (drm_mode_width(mode) > width || |
996 | drm_mode_height(mode) > height) | |
997 | continue; | |
998 | if (mode->type & DRM_MODE_TYPE_PREFERRED) | |
999 | return mode; | |
1000 | } | |
1001 | return NULL; | |
1002 | } | |
1003 | ||
0b4c0f3f | 1004 | static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) |
38651674 | 1005 | { |
1794d257 | 1006 | struct drm_cmdline_mode *cmdline_mode; |
0b4c0f3f | 1007 | cmdline_mode = &fb_connector->cmdline_mode; |
38651674 DA |
1008 | return cmdline_mode->specified; |
1009 | } | |
1010 | ||
0b4c0f3f DA |
1011 | static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, |
1012 | int width, int height) | |
38651674 | 1013 | { |
1794d257 | 1014 | struct drm_cmdline_mode *cmdline_mode; |
38651674 DA |
1015 | struct drm_display_mode *mode = NULL; |
1016 | ||
0b4c0f3f | 1017 | cmdline_mode = &fb_helper_conn->cmdline_mode; |
38651674 DA |
1018 | if (cmdline_mode->specified == false) |
1019 | return mode; | |
1020 | ||
1021 | /* attempt to find a matching mode in the list of modes | |
1022 | * we have gotten so far, if not add a CVT mode that conforms | |
1023 | */ | |
1024 | if (cmdline_mode->rb || cmdline_mode->margins) | |
1025 | goto create_mode; | |
1026 | ||
0b4c0f3f | 1027 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { |
38651674 DA |
1028 | /* check width/height */ |
1029 | if (mode->hdisplay != cmdline_mode->xres || | |
1030 | mode->vdisplay != cmdline_mode->yres) | |
1031 | continue; | |
1032 | ||
1033 | if (cmdline_mode->refresh_specified) { | |
1034 | if (mode->vrefresh != cmdline_mode->refresh) | |
1035 | continue; | |
1036 | } | |
1037 | ||
1038 | if (cmdline_mode->interlace) { | |
1039 | if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) | |
1040 | continue; | |
1041 | } | |
1042 | return mode; | |
1043 | } | |
1044 | ||
1045 | create_mode: | |
1794d257 CW |
1046 | mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, |
1047 | cmdline_mode); | |
0b4c0f3f | 1048 | list_add(&mode->head, &fb_helper_conn->connector->modes); |
38651674 DA |
1049 | return mode; |
1050 | } | |
1051 | ||
1052 | static bool drm_connector_enabled(struct drm_connector *connector, bool strict) | |
1053 | { | |
1054 | bool enable; | |
1055 | ||
96081cdf | 1056 | if (strict) |
38651674 | 1057 | enable = connector->status == connector_status_connected; |
96081cdf | 1058 | else |
38651674 | 1059 | enable = connector->status != connector_status_disconnected; |
96081cdf | 1060 | |
38651674 DA |
1061 | return enable; |
1062 | } | |
1063 | ||
0b4c0f3f DA |
1064 | static void drm_enable_connectors(struct drm_fb_helper *fb_helper, |
1065 | bool *enabled) | |
38651674 DA |
1066 | { |
1067 | bool any_enabled = false; | |
1068 | struct drm_connector *connector; | |
1069 | int i = 0; | |
1070 | ||
0b4c0f3f DA |
1071 | for (i = 0; i < fb_helper->connector_count; i++) { |
1072 | connector = fb_helper->connector_info[i]->connector; | |
38651674 DA |
1073 | enabled[i] = drm_connector_enabled(connector, true); |
1074 | DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, | |
1075 | enabled[i] ? "yes" : "no"); | |
1076 | any_enabled |= enabled[i]; | |
38651674 DA |
1077 | } |
1078 | ||
1079 | if (any_enabled) | |
1080 | return; | |
1081 | ||
0b4c0f3f DA |
1082 | for (i = 0; i < fb_helper->connector_count; i++) { |
1083 | connector = fb_helper->connector_info[i]->connector; | |
38651674 | 1084 | enabled[i] = drm_connector_enabled(connector, false); |
38651674 DA |
1085 | } |
1086 | } | |
1087 | ||
1d42bbc8 DA |
1088 | static bool drm_target_cloned(struct drm_fb_helper *fb_helper, |
1089 | struct drm_display_mode **modes, | |
1090 | bool *enabled, int width, int height) | |
1091 | { | |
1092 | int count, i, j; | |
1093 | bool can_clone = false; | |
1094 | struct drm_fb_helper_connector *fb_helper_conn; | |
1095 | struct drm_display_mode *dmt_mode, *mode; | |
1096 | ||
1097 | /* only contemplate cloning in the single crtc case */ | |
1098 | if (fb_helper->crtc_count > 1) | |
1099 | return false; | |
1100 | ||
1101 | count = 0; | |
1102 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1103 | if (enabled[i]) | |
1104 | count++; | |
1105 | } | |
1106 | ||
1107 | /* only contemplate cloning if more than one connector is enabled */ | |
1108 | if (count <= 1) | |
1109 | return false; | |
1110 | ||
1111 | /* check the command line or if nothing common pick 1024x768 */ | |
1112 | can_clone = true; | |
1113 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1114 | if (!enabled[i]) | |
1115 | continue; | |
1116 | fb_helper_conn = fb_helper->connector_info[i]; | |
1117 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); | |
1118 | if (!modes[i]) { | |
1119 | can_clone = false; | |
1120 | break; | |
1121 | } | |
1122 | for (j = 0; j < i; j++) { | |
1123 | if (!enabled[j]) | |
1124 | continue; | |
1125 | if (!drm_mode_equal(modes[j], modes[i])) | |
1126 | can_clone = false; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | if (can_clone) { | |
1131 | DRM_DEBUG_KMS("can clone using command line\n"); | |
1132 | return true; | |
1133 | } | |
1134 | ||
1135 | /* try and find a 1024x768 mode on each connector */ | |
1136 | can_clone = true; | |
f6e252ba | 1137 | dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); |
1d42bbc8 DA |
1138 | |
1139 | for (i = 0; i < fb_helper->connector_count; i++) { | |
1140 | ||
1141 | if (!enabled[i]) | |
1142 | continue; | |
1143 | ||
1144 | fb_helper_conn = fb_helper->connector_info[i]; | |
1145 | list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { | |
1146 | if (drm_mode_equal(mode, dmt_mode)) | |
1147 | modes[i] = mode; | |
1148 | } | |
1149 | if (!modes[i]) | |
1150 | can_clone = false; | |
1151 | } | |
1152 | ||
1153 | if (can_clone) { | |
1154 | DRM_DEBUG_KMS("can clone using 1024x768\n"); | |
1155 | return true; | |
1156 | } | |
1157 | DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); | |
1158 | return false; | |
1159 | } | |
1160 | ||
0b4c0f3f | 1161 | static bool drm_target_preferred(struct drm_fb_helper *fb_helper, |
38651674 DA |
1162 | struct drm_display_mode **modes, |
1163 | bool *enabled, int width, int height) | |
1164 | { | |
0b4c0f3f DA |
1165 | struct drm_fb_helper_connector *fb_helper_conn; |
1166 | int i; | |
38651674 | 1167 | |
0b4c0f3f DA |
1168 | for (i = 0; i < fb_helper->connector_count; i++) { |
1169 | fb_helper_conn = fb_helper->connector_info[i]; | |
38651674 | 1170 | |
0b4c0f3f | 1171 | if (enabled[i] == false) |
38651674 | 1172 | continue; |
38651674 DA |
1173 | |
1174 | DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", | |
0b4c0f3f | 1175 | fb_helper_conn->connector->base.id); |
38651674 DA |
1176 | |
1177 | /* got for command line mode first */ | |
0b4c0f3f | 1178 | modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); |
38651674 DA |
1179 | if (!modes[i]) { |
1180 | DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", | |
0b4c0f3f DA |
1181 | fb_helper_conn->connector->base.id); |
1182 | modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); | |
38651674 DA |
1183 | } |
1184 | /* No preferred modes, pick one off the list */ | |
0b4c0f3f DA |
1185 | if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { |
1186 | list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) | |
38651674 DA |
1187 | break; |
1188 | } | |
1189 | DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : | |
1190 | "none"); | |
38651674 DA |
1191 | } |
1192 | return true; | |
1193 | } | |
1194 | ||
8be48d92 DA |
1195 | static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, |
1196 | struct drm_fb_helper_crtc **best_crtcs, | |
38651674 DA |
1197 | struct drm_display_mode **modes, |
1198 | int n, int width, int height) | |
1199 | { | |
1200 | int c, o; | |
8be48d92 | 1201 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
1202 | struct drm_connector *connector; |
1203 | struct drm_connector_helper_funcs *connector_funcs; | |
1204 | struct drm_encoder *encoder; | |
8be48d92 | 1205 | struct drm_fb_helper_crtc *best_crtc; |
38651674 | 1206 | int my_score, best_score, score; |
8be48d92 | 1207 | struct drm_fb_helper_crtc **crtcs, *crtc; |
0b4c0f3f | 1208 | struct drm_fb_helper_connector *fb_helper_conn; |
38651674 | 1209 | |
0b4c0f3f | 1210 | if (n == fb_helper->connector_count) |
38651674 | 1211 | return 0; |
0b4c0f3f DA |
1212 | |
1213 | fb_helper_conn = fb_helper->connector_info[n]; | |
1214 | connector = fb_helper_conn->connector; | |
38651674 DA |
1215 | |
1216 | best_crtcs[n] = NULL; | |
1217 | best_crtc = NULL; | |
8be48d92 | 1218 | best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); |
38651674 DA |
1219 | if (modes[n] == NULL) |
1220 | return best_score; | |
1221 | ||
8be48d92 DA |
1222 | crtcs = kzalloc(dev->mode_config.num_connector * |
1223 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); | |
38651674 DA |
1224 | if (!crtcs) |
1225 | return best_score; | |
1226 | ||
1227 | my_score = 1; | |
1228 | if (connector->status == connector_status_connected) | |
1229 | my_score++; | |
0b4c0f3f | 1230 | if (drm_has_cmdline_mode(fb_helper_conn)) |
38651674 | 1231 | my_score++; |
0b4c0f3f | 1232 | if (drm_has_preferred_mode(fb_helper_conn, width, height)) |
38651674 DA |
1233 | my_score++; |
1234 | ||
1235 | connector_funcs = connector->helper_private; | |
1236 | encoder = connector_funcs->best_encoder(connector); | |
1237 | if (!encoder) | |
1238 | goto out; | |
1239 | ||
38651674 DA |
1240 | /* select a crtc for this connector and then attempt to configure |
1241 | remaining connectors */ | |
8be48d92 DA |
1242 | for (c = 0; c < fb_helper->crtc_count; c++) { |
1243 | crtc = &fb_helper->crtc_info[c]; | |
38651674 | 1244 | |
96081cdf | 1245 | if ((encoder->possible_crtcs & (1 << c)) == 0) |
38651674 | 1246 | continue; |
38651674 DA |
1247 | |
1248 | for (o = 0; o < n; o++) | |
1249 | if (best_crtcs[o] == crtc) | |
1250 | break; | |
1251 | ||
1252 | if (o < n) { | |
1d42bbc8 DA |
1253 | /* ignore cloning unless only a single crtc */ |
1254 | if (fb_helper->crtc_count > 1) | |
1255 | continue; | |
1256 | ||
1257 | if (!drm_mode_equal(modes[o], modes[n])) | |
1258 | continue; | |
38651674 DA |
1259 | } |
1260 | ||
1261 | crtcs[n] = crtc; | |
8be48d92 DA |
1262 | memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); |
1263 | score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, | |
38651674 DA |
1264 | width, height); |
1265 | if (score > best_score) { | |
1266 | best_crtc = crtc; | |
1267 | best_score = score; | |
1268 | memcpy(best_crtcs, crtcs, | |
1269 | dev->mode_config.num_connector * | |
8be48d92 | 1270 | sizeof(struct drm_fb_helper_crtc *)); |
38651674 | 1271 | } |
38651674 DA |
1272 | } |
1273 | out: | |
1274 | kfree(crtcs); | |
1275 | return best_score; | |
1276 | } | |
1277 | ||
8be48d92 | 1278 | static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) |
38651674 | 1279 | { |
8be48d92 DA |
1280 | struct drm_device *dev = fb_helper->dev; |
1281 | struct drm_fb_helper_crtc **crtcs; | |
38651674 | 1282 | struct drm_display_mode **modes; |
8be48d92 | 1283 | struct drm_mode_set *modeset; |
38651674 DA |
1284 | bool *enabled; |
1285 | int width, height; | |
1286 | int i, ret; | |
1287 | ||
1288 | DRM_DEBUG_KMS("\n"); | |
1289 | ||
1290 | width = dev->mode_config.max_width; | |
1291 | height = dev->mode_config.max_height; | |
1292 | ||
38651674 | 1293 | crtcs = kcalloc(dev->mode_config.num_connector, |
8be48d92 | 1294 | sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); |
38651674 DA |
1295 | modes = kcalloc(dev->mode_config.num_connector, |
1296 | sizeof(struct drm_display_mode *), GFP_KERNEL); | |
1297 | enabled = kcalloc(dev->mode_config.num_connector, | |
1298 | sizeof(bool), GFP_KERNEL); | |
8c5eaca0 SK |
1299 | if (!crtcs || !modes || !enabled) { |
1300 | DRM_ERROR("Memory allocation failed\n"); | |
1301 | goto out; | |
1302 | } | |
1303 | ||
38651674 | 1304 | |
0b4c0f3f | 1305 | drm_enable_connectors(fb_helper, enabled); |
38651674 | 1306 | |
1d42bbc8 DA |
1307 | ret = drm_target_cloned(fb_helper, modes, enabled, width, height); |
1308 | if (!ret) { | |
1309 | ret = drm_target_preferred(fb_helper, modes, enabled, width, height); | |
1310 | if (!ret) | |
1311 | DRM_ERROR("Unable to find initial modes\n"); | |
1312 | } | |
38651674 DA |
1313 | |
1314 | DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); | |
1315 | ||
8be48d92 DA |
1316 | drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); |
1317 | ||
1318 | /* need to set the modesets up here for use later */ | |
1319 | /* fill out the connector<->crtc mappings into the modesets */ | |
1320 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1321 | modeset = &fb_helper->crtc_info[i].mode_set; | |
1322 | modeset->num_connectors = 0; | |
7e53f3a4 | 1323 | modeset->fb = NULL; |
8be48d92 | 1324 | } |
38651674 | 1325 | |
0b4c0f3f | 1326 | for (i = 0; i < fb_helper->connector_count; i++) { |
38651674 | 1327 | struct drm_display_mode *mode = modes[i]; |
8be48d92 DA |
1328 | struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; |
1329 | modeset = &fb_crtc->mode_set; | |
38651674 | 1330 | |
8be48d92 | 1331 | if (mode && fb_crtc) { |
38651674 | 1332 | DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", |
8be48d92 DA |
1333 | mode->name, fb_crtc->mode_set.crtc->base.id); |
1334 | fb_crtc->desired_mode = mode; | |
1335 | if (modeset->mode) | |
1336 | drm_mode_destroy(dev, modeset->mode); | |
1337 | modeset->mode = drm_mode_duplicate(dev, | |
1338 | fb_crtc->desired_mode); | |
0b4c0f3f | 1339 | modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; |
7e53f3a4 | 1340 | modeset->fb = fb_helper->fb; |
38651674 | 1341 | } |
38651674 DA |
1342 | } |
1343 | ||
7e53f3a4 DV |
1344 | /* Clear out any old modes if there are no more connected outputs. */ |
1345 | for (i = 0; i < fb_helper->crtc_count; i++) { | |
1346 | modeset = &fb_helper->crtc_info[i].mode_set; | |
1347 | if (modeset->num_connectors == 0) { | |
1348 | BUG_ON(modeset->fb); | |
1349 | BUG_ON(modeset->num_connectors); | |
1350 | if (modeset->mode) | |
1351 | drm_mode_destroy(dev, modeset->mode); | |
1352 | modeset->mode = NULL; | |
1353 | } | |
1354 | } | |
8c5eaca0 | 1355 | out: |
38651674 DA |
1356 | kfree(crtcs); |
1357 | kfree(modes); | |
1358 | kfree(enabled); | |
1359 | } | |
1360 | ||
1361 | /** | |
1362 | * drm_helper_initial_config - setup a sane initial connector configuration | |
d0ddc033 DV |
1363 | * @fb_helper: fb_helper device struct |
1364 | * @bpp_sel: bpp value to use for the framebuffer configuration | |
38651674 DA |
1365 | * |
1366 | * LOCKING: | |
d0ddc033 DV |
1367 | * Called at init time by the driver to set up the @fb_helper initial |
1368 | * configuration, must take the mode config lock. | |
38651674 | 1369 | * |
d0ddc033 | 1370 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
38651674 DA |
1371 | * At the moment, this is a cloned configuration across all heads with |
1372 | * a new framebuffer object as the backing store. | |
1373 | * | |
1374 | * RETURNS: | |
1375 | * Zero if everything went ok, nonzero otherwise. | |
1376 | */ | |
4abe3520 | 1377 | bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
38651674 | 1378 | { |
8be48d92 | 1379 | struct drm_device *dev = fb_helper->dev; |
38651674 DA |
1380 | int count = 0; |
1381 | ||
0b4c0f3f | 1382 | drm_fb_helper_parse_command_line(fb_helper); |
38651674 | 1383 | |
0b4c0f3f DA |
1384 | count = drm_fb_helper_probe_connector_modes(fb_helper, |
1385 | dev->mode_config.max_width, | |
1386 | dev->mode_config.max_height); | |
38651674 DA |
1387 | /* |
1388 | * we shouldn't end up with no modes here. | |
1389 | */ | |
96081cdf | 1390 | if (count == 0) |
d56b1b9d | 1391 | dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); |
96081cdf | 1392 | |
8be48d92 | 1393 | drm_setup_crtcs(fb_helper); |
38651674 | 1394 | |
4abe3520 | 1395 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
38651674 | 1396 | } |
8be48d92 | 1397 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
38651674 | 1398 | |
7394371d CW |
1399 | /** |
1400 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by | |
d0ddc033 | 1401 | * probing all the outputs attached to the fb |
7394371d CW |
1402 | * @fb_helper: the drm_fb_helper |
1403 | * | |
1404 | * LOCKING: | |
1405 | * Called at runtime, must take mode config lock. | |
1406 | * | |
1407 | * Scan the connectors attached to the fb_helper and try to put together a | |
1408 | * setup after *notification of a change in output configuration. | |
1409 | * | |
1410 | * RETURNS: | |
1411 | * 0 on success and a non-zero error code otherwise. | |
1412 | */ | |
1413 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) | |
38651674 | 1414 | { |
7394371d | 1415 | struct drm_device *dev = fb_helper->dev; |
5c4426a7 | 1416 | int count = 0; |
4abe3520 | 1417 | u32 max_width, max_height, bpp_sel; |
5c4426a7 | 1418 | |
eb1f8e4f | 1419 | if (!fb_helper->fb) |
7394371d | 1420 | return 0; |
4abe3520 | 1421 | |
84849903 | 1422 | drm_modeset_lock_all(dev); |
20c60c35 | 1423 | if (!drm_fb_helper_is_bound(fb_helper)) { |
4abe3520 | 1424 | fb_helper->delayed_hotplug = true; |
84849903 | 1425 | drm_modeset_unlock_all(dev); |
7394371d | 1426 | return 0; |
4abe3520 | 1427 | } |
eb1f8e4f | 1428 | DRM_DEBUG_KMS("\n"); |
4abe3520 | 1429 | |
eb1f8e4f DA |
1430 | max_width = fb_helper->fb->width; |
1431 | max_height = fb_helper->fb->height; | |
1432 | bpp_sel = fb_helper->fb->bits_per_pixel; | |
5c4426a7 | 1433 | |
eb1f8e4f DA |
1434 | count = drm_fb_helper_probe_connector_modes(fb_helper, max_width, |
1435 | max_height); | |
1436 | drm_setup_crtcs(fb_helper); | |
84849903 | 1437 | drm_modeset_unlock_all(dev); |
4abe3520 | 1438 | |
eb1f8e4f | 1439 | return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
5c4426a7 | 1440 | } |
eb1f8e4f | 1441 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
5c4426a7 | 1442 | |
6a108a14 | 1443 | /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) |
3ce05168 DF |
1444 | * but the module doesn't depend on any fb console symbols. At least |
1445 | * attempt to load fbcon to avoid leaving the system without a usable console. | |
1446 | */ | |
6a108a14 | 1447 | #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) |
3ce05168 DF |
1448 | static int __init drm_fb_helper_modinit(void) |
1449 | { | |
1450 | const char *name = "fbcon"; | |
1451 | struct module *fbcon; | |
1452 | ||
1453 | mutex_lock(&module_mutex); | |
1454 | fbcon = find_module(name); | |
1455 | mutex_unlock(&module_mutex); | |
1456 | ||
1457 | if (!fbcon) | |
1458 | request_module_nowait(name); | |
1459 | return 0; | |
1460 | } | |
1461 | ||
1462 | module_init(drm_fb_helper_modinit); | |
1463 | #endif |