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 */
30
31 #include <sys/cdefs.h>
32 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33
34 #include <dev/drm2/drmP.h>
35 #include <dev/drm2/drm_crtc.h>
36 #include <dev/drm2/drm_fb_helper.h>
37 #include <dev/drm2/drm_crtc_helper.h>
38
39 MODULE_AUTHOR("David Airlie, Jesse Barnes");
40 MODULE_DESCRIPTION("DRM KMS helper");
41 MODULE_LICENSE("GPL and additional rights");
42
43 static DRM_LIST_HEAD(kernel_fb_helper_list);
44
45 #include <sys/kdb.h>
46 #include <sys/param.h>
47 #include <sys/systm.h>
48
49 struct vt_kms_softc {
50 struct drm_fb_helper *fb_helper;
51 struct task fb_mode_task;
52 };
53
54 /* Call restore out of vt(9) locks. */
55 static void
vt_restore_fbdev_mode(void * arg,int pending)56 vt_restore_fbdev_mode(void *arg, int pending)
57 {
58 struct drm_fb_helper *fb_helper;
59 struct vt_kms_softc *sc;
60
61 sc = (struct vt_kms_softc *)arg;
62 fb_helper = sc->fb_helper;
63 sx_xlock(&fb_helper->dev->mode_config.mutex);
64 drm_fb_helper_restore_fbdev_mode(fb_helper);
65 sx_xunlock(&fb_helper->dev->mode_config.mutex);
66 }
67
68 static int
vt_kms_postswitch(void * arg)69 vt_kms_postswitch(void *arg)
70 {
71 struct vt_kms_softc *sc;
72
73 sc = (struct vt_kms_softc *)arg;
74
75 if (!kdb_active && !KERNEL_PANICKED())
76 taskqueue_enqueue(taskqueue_thread, &sc->fb_mode_task);
77 else
78 drm_fb_helper_restore_fbdev_mode(sc->fb_helper);
79
80 return (0);
81 }
82
83 struct fb_info *
framebuffer_alloc(void)84 framebuffer_alloc(void)
85 {
86 struct fb_info *info;
87 struct vt_kms_softc *sc;
88
89 info = malloc(sizeof(*info), DRM_MEM_KMS, M_WAITOK | M_ZERO);
90
91 sc = malloc(sizeof(*sc), DRM_MEM_KMS, M_WAITOK | M_ZERO);
92 TASK_INIT(&sc->fb_mode_task, 0, vt_restore_fbdev_mode, sc);
93
94 info->fb_priv = sc;
95 info->enter = &vt_kms_postswitch;
96
97 return (info);
98 }
99
100 void
framebuffer_release(struct fb_info * info)101 framebuffer_release(struct fb_info *info)
102 {
103
104 free(info->fb_priv, DRM_MEM_KMS);
105 free(info, DRM_MEM_KMS);
106 }
107
108 static int
fb_get_options(const char * connector_name,char ** option)109 fb_get_options(const char *connector_name, char **option)
110 {
111 char tunable[64];
112
113 /*
114 * A user may use loader tunables to set a specific mode for the
115 * console. Tunables are read in the following order:
116 * 1. kern.vt.fb.modes.$connector_name
117 * 2. kern.vt.fb.default_mode
118 *
119 * Example of a mode specific to the LVDS connector:
120 * kern.vt.fb.modes.LVDS="1024x768"
121 *
122 * Example of a mode applied to all connectors not having a
123 * connector-specific mode:
124 * kern.vt.fb.default_mode="640x480"
125 */
126 snprintf(tunable, sizeof(tunable), "kern.vt.fb.modes.%s",
127 connector_name);
128 DRM_INFO("Connector %s: get mode from tunables:\n", connector_name);
129 DRM_INFO(" - %s\n", tunable);
130 DRM_INFO(" - kern.vt.fb.default_mode\n");
131 *option = kern_getenv(tunable);
132 if (*option == NULL)
133 *option = kern_getenv("kern.vt.fb.default_mode");
134
135 return (*option != NULL ? 0 : -ENOENT);
136 }
137
138 /**
139 * DOC: fbdev helpers
140 *
141 * The fb helper functions are useful to provide an fbdev on top of a drm kernel
142 * mode setting driver. They can be used mostly independantely from the crtc
143 * helper functions used by many drivers to implement the kernel mode setting
144 * interfaces.
145 */
146
147 /* simple single crtc case helper function */
drm_fb_helper_single_add_all_connectors(struct drm_fb_helper * fb_helper)148 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
149 {
150 struct drm_device *dev = fb_helper->dev;
151 struct drm_connector *connector;
152 int i;
153
154 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
155 struct drm_fb_helper_connector *fb_helper_connector;
156
157 fb_helper_connector = malloc(sizeof(struct drm_fb_helper_connector),
158 DRM_MEM_KMS, M_NOWAIT | M_ZERO);
159 if (!fb_helper_connector)
160 goto fail;
161
162 fb_helper_connector->connector = connector;
163 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
164 }
165 return 0;
166 fail:
167 for (i = 0; i < fb_helper->connector_count; i++) {
168 free(fb_helper->connector_info[i], DRM_MEM_KMS);
169 fb_helper->connector_info[i] = NULL;
170 }
171 fb_helper->connector_count = 0;
172 return -ENOMEM;
173 }
174 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
175
drm_fb_helper_parse_command_line(struct drm_fb_helper * fb_helper)176 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
177 {
178 struct drm_fb_helper_connector *fb_helper_conn;
179 int i;
180
181 for (i = 0; i < fb_helper->connector_count; i++) {
182 struct drm_cmdline_mode *mode;
183 struct drm_connector *connector;
184 char *option = NULL;
185
186 fb_helper_conn = fb_helper->connector_info[i];
187 connector = fb_helper_conn->connector;
188 mode = &fb_helper_conn->cmdline_mode;
189
190 /* do something on return - turn off connector maybe */
191 if (fb_get_options(drm_get_connector_name(connector), &option))
192 continue;
193
194 if (drm_mode_parse_command_line_for_connector(option,
195 connector,
196 mode)) {
197 if (mode->force) {
198 const char *s;
199 switch (mode->force) {
200 case DRM_FORCE_OFF:
201 s = "OFF";
202 break;
203 case DRM_FORCE_ON_DIGITAL:
204 s = "ON - dig";
205 break;
206 default:
207 case DRM_FORCE_ON:
208 s = "ON";
209 break;
210 }
211
212 DRM_INFO("forcing %s connector %s\n",
213 drm_get_connector_name(connector), s);
214 connector->force = mode->force;
215 }
216
217 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
218 drm_get_connector_name(connector),
219 mode->xres, mode->yres,
220 mode->refresh_specified ? mode->refresh : 60,
221 mode->rb ? " reduced blanking" : "",
222 mode->margins ? " with margins" : "",
223 mode->interlace ? " interlaced" : "");
224 }
225
226 freeenv(option);
227 }
228 return 0;
229 }
230
231 #if 0 && defined(FREEBSD_NOTYET)
232 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
233 {
234 uint16_t *r_base, *g_base, *b_base;
235 int i;
236
237 r_base = crtc->gamma_store;
238 g_base = r_base + crtc->gamma_size;
239 b_base = g_base + crtc->gamma_size;
240
241 for (i = 0; i < crtc->gamma_size; i++)
242 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
243 }
244
245 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
246 {
247 uint16_t *r_base, *g_base, *b_base;
248
249 if (crtc->funcs->gamma_set == NULL)
250 return;
251
252 r_base = crtc->gamma_store;
253 g_base = r_base + crtc->gamma_size;
254 b_base = g_base + crtc->gamma_size;
255
256 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
257 }
258
259 int drm_fb_helper_debug_enter(struct fb_info *info)
260 {
261 struct drm_fb_helper *helper = info->par;
262 struct drm_crtc_helper_funcs *funcs;
263 int i;
264
265 if (list_empty(&kernel_fb_helper_list))
266 return false;
267
268 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
269 for (i = 0; i < helper->crtc_count; i++) {
270 struct drm_mode_set *mode_set =
271 &helper->crtc_info[i].mode_set;
272
273 if (!mode_set->crtc->enabled)
274 continue;
275
276 funcs = mode_set->crtc->helper_private;
277 drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
278 funcs->mode_set_base_atomic(mode_set->crtc,
279 mode_set->fb,
280 mode_set->x,
281 mode_set->y,
282 ENTER_ATOMIC_MODE_SET);
283 }
284 }
285
286 return 0;
287 }
288 EXPORT_SYMBOL(drm_fb_helper_debug_enter);
289
290 /* Find the real fb for a given fb helper CRTC */
291 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
292 {
293 struct drm_device *dev = crtc->dev;
294 struct drm_crtc *c;
295
296 list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
297 if (crtc->base.id == c->base.id)
298 return c->fb;
299 }
300
301 return NULL;
302 }
303
304 int drm_fb_helper_debug_leave(struct fb_info *info)
305 {
306 struct drm_fb_helper *helper = info->par;
307 struct drm_crtc *crtc;
308 struct drm_crtc_helper_funcs *funcs;
309 struct drm_framebuffer *fb;
310 int i;
311
312 for (i = 0; i < helper->crtc_count; i++) {
313 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
314 crtc = mode_set->crtc;
315 funcs = crtc->helper_private;
316 fb = drm_mode_config_fb(crtc);
317
318 if (!crtc->enabled)
319 continue;
320
321 if (!fb) {
322 DRM_ERROR("no fb to restore??\n");
323 continue;
324 }
325
326 drm_fb_helper_restore_lut_atomic(mode_set->crtc);
327 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
328 crtc->y, LEAVE_ATOMIC_MODE_SET);
329 }
330
331 return 0;
332 }
333 EXPORT_SYMBOL(drm_fb_helper_debug_leave);
334 #endif /* FREEBSD_NOTYET */
335
drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper * fb_helper)336 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
337 {
338 bool error = false;
339 int i, ret;
340
341 for (i = 0; i < fb_helper->crtc_count; i++) {
342 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
343 ret = mode_set->crtc->funcs->set_config(mode_set);
344 if (ret)
345 error = true;
346 }
347 return error;
348 }
349 EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode);
350
drm_fb_helper_force_kernel_mode(void)351 static bool drm_fb_helper_force_kernel_mode(void)
352 {
353 bool ret, error = false;
354 struct drm_fb_helper *helper;
355
356 if (list_empty(&kernel_fb_helper_list))
357 return false;
358
359 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
360 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
361 continue;
362
363 ret = drm_fb_helper_restore_fbdev_mode(helper);
364 if (ret)
365 error = true;
366 }
367 return error;
368 }
369
370 #if 0 && defined(FREEBSD_NOTYET)
371 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
372 void *panic_str)
373 {
374 /*
375 * It's a waste of time and effort to switch back to text console
376 * if the kernel should reboot before panic messages can be seen.
377 */
378 if (panic_timeout < 0)
379 return 0;
380
381 pr_err("panic occurred, switching back to text console\n");
382 return drm_fb_helper_force_kernel_mode();
383 }
384 EXPORT_SYMBOL(drm_fb_helper_panic);
385
386 static struct notifier_block paniced = {
387 .notifier_call = drm_fb_helper_panic,
388 };
389 #endif /* FREEBSD_NOTYET */
390
391 /**
392 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
393 *
394 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
395 */
drm_fb_helper_restore(void)396 void drm_fb_helper_restore(void)
397 {
398 bool ret;
399 ret = drm_fb_helper_force_kernel_mode();
400 if (ret == true)
401 DRM_ERROR("Failed to restore crtc configuration\n");
402 }
403 EXPORT_SYMBOL(drm_fb_helper_restore);
404
405 #ifdef __linux__
406 #ifdef CONFIG_MAGIC_SYSRQ
drm_fb_helper_restore_work_fn(struct work_struct * ignored)407 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
408 {
409 drm_fb_helper_restore();
410 }
411 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
412
drm_fb_helper_sysrq(int dummy1)413 static void drm_fb_helper_sysrq(int dummy1)
414 {
415 schedule_work(&drm_fb_helper_restore_work);
416 }
417
418 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
419 .handler = drm_fb_helper_sysrq,
420 .help_msg = "force-fb(V)",
421 .action_msg = "Restore framebuffer console",
422 };
423 #else
424 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
425 #endif
426 #endif
427
428 #if 0 && defined(FREEBSD_NOTYET)
429 static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
430 {
431 struct drm_fb_helper *fb_helper = info->par;
432 struct drm_device *dev = fb_helper->dev;
433 struct drm_crtc *crtc;
434 struct drm_connector *connector;
435 int i, j;
436
437 /*
438 * For each CRTC in this fb, turn the connectors on/off.
439 */
440 sx_xlock(&dev->mode_config.mutex);
441 for (i = 0; i < fb_helper->crtc_count; i++) {
442 crtc = fb_helper->crtc_info[i].mode_set.crtc;
443
444 if (!crtc->enabled)
445 continue;
446
447 /* Walk the connectors & encoders on this fb turning them on/off */
448 for (j = 0; j < fb_helper->connector_count; j++) {
449 connector = fb_helper->connector_info[j]->connector;
450 connector->funcs->dpms(connector, dpms_mode);
451 drm_object_property_set_value(&connector->base,
452 dev->mode_config.dpms_property, dpms_mode);
453 }
454 }
455 sx_xunlock(&dev->mode_config.mutex);
456 }
457
458 int drm_fb_helper_blank(int blank, struct fb_info *info)
459 {
460 switch (blank) {
461 /* Display: On; HSync: On, VSync: On */
462 case FB_BLANK_UNBLANK:
463 drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON);
464 break;
465 /* Display: Off; HSync: On, VSync: On */
466 case FB_BLANK_NORMAL:
467 drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY);
468 break;
469 /* Display: Off; HSync: Off, VSync: On */
470 case FB_BLANK_HSYNC_SUSPEND:
471 drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY);
472 break;
473 /* Display: Off; HSync: On, VSync: Off */
474 case FB_BLANK_VSYNC_SUSPEND:
475 drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND);
476 break;
477 /* Display: Off; HSync: Off, VSync: Off */
478 case FB_BLANK_POWERDOWN:
479 drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF);
480 break;
481 }
482 return 0;
483 }
484 EXPORT_SYMBOL(drm_fb_helper_blank);
485 #endif /* FREEBSD_NOTYET */
486
drm_fb_helper_crtc_free(struct drm_fb_helper * helper)487 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
488 {
489 int i;
490
491 for (i = 0; i < helper->connector_count; i++)
492 free(helper->connector_info[i], DRM_MEM_KMS);
493 free(helper->connector_info, DRM_MEM_KMS);
494 for (i = 0; i < helper->crtc_count; i++) {
495 free(helper->crtc_info[i].mode_set.connectors, DRM_MEM_KMS);
496 if (helper->crtc_info[i].mode_set.mode)
497 drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode);
498 }
499 free(helper->crtc_info, DRM_MEM_KMS);
500 }
501
drm_fb_helper_init(struct drm_device * dev,struct drm_fb_helper * fb_helper,int crtc_count,int max_conn_count)502 int drm_fb_helper_init(struct drm_device *dev,
503 struct drm_fb_helper *fb_helper,
504 int crtc_count, int max_conn_count)
505 {
506 struct drm_crtc *crtc;
507 int i;
508
509 fb_helper->dev = dev;
510
511 INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
512
513 fb_helper->crtc_info = malloc(crtc_count * sizeof(struct drm_fb_helper_crtc),
514 DRM_MEM_KMS, M_NOWAIT | M_ZERO);
515 if (!fb_helper->crtc_info)
516 return -ENOMEM;
517
518 fb_helper->crtc_count = crtc_count;
519 fb_helper->connector_info = malloc(dev->mode_config.num_connector * sizeof(struct drm_fb_helper_connector *),
520 DRM_MEM_KMS, M_NOWAIT | M_ZERO);
521 if (!fb_helper->connector_info) {
522 free(fb_helper->crtc_info, DRM_MEM_KMS);
523 return -ENOMEM;
524 }
525 fb_helper->connector_count = 0;
526
527 for (i = 0; i < crtc_count; i++) {
528 fb_helper->crtc_info[i].mode_set.connectors =
529 malloc(max_conn_count *
530 sizeof(struct drm_connector *),
531 DRM_MEM_KMS, M_NOWAIT | M_ZERO);
532
533 if (!fb_helper->crtc_info[i].mode_set.connectors)
534 goto out_free;
535 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
536 }
537
538 i = 0;
539 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
540 fb_helper->crtc_info[i].mode_set.crtc = crtc;
541 i++;
542 }
543
544 return 0;
545 out_free:
546 drm_fb_helper_crtc_free(fb_helper);
547 return -ENOMEM;
548 }
549 EXPORT_SYMBOL(drm_fb_helper_init);
550
drm_fb_helper_fini(struct drm_fb_helper * fb_helper)551 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
552 {
553 if (!list_empty(&fb_helper->kernel_fb_list)) {
554 list_del(&fb_helper->kernel_fb_list);
555 #if 0 && defined(FREEBSD_NOTYET)
556 if (list_empty(&kernel_fb_helper_list)) {
557 pr_info("drm: unregistered panic notifier\n");
558 atomic_notifier_chain_unregister(&panic_notifier_list,
559 &paniced);
560 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
561 }
562 #endif /* FREEBSD_NOTYET */
563 }
564
565 drm_fb_helper_crtc_free(fb_helper);
566
567 }
568 EXPORT_SYMBOL(drm_fb_helper_fini);
569
570 #if 0 && defined(FREEBSD_NOTYET)
571 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
572 u16 blue, u16 regno, struct fb_info *info)
573 {
574 struct drm_fb_helper *fb_helper = info->par;
575 struct drm_framebuffer *fb = fb_helper->fb;
576 int pindex;
577
578 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
579 u32 *palette;
580 u32 value;
581 /* place color in pseudopalette */
582 if (regno > 16)
583 return -EINVAL;
584 palette = (u32 *)info->pseudo_palette;
585 red >>= (16 - info->var.red.length);
586 green >>= (16 - info->var.green.length);
587 blue >>= (16 - info->var.blue.length);
588 value = (red << info->var.red.offset) |
589 (green << info->var.green.offset) |
590 (blue << info->var.blue.offset);
591 if (info->var.transp.length > 0) {
592 u32 mask = (1 << info->var.transp.length) - 1;
593 mask <<= info->var.transp.offset;
594 value |= mask;
595 }
596 palette[regno] = value;
597 return 0;
598 }
599
600 pindex = regno;
601
602 if (fb->bits_per_pixel == 16) {
603 pindex = regno << 3;
604
605 if (fb->depth == 16 && regno > 63)
606 return -EINVAL;
607 if (fb->depth == 15 && regno > 31)
608 return -EINVAL;
609
610 if (fb->depth == 16) {
611 u16 r, g, b;
612 int i;
613 if (regno < 32) {
614 for (i = 0; i < 8; i++)
615 fb_helper->funcs->gamma_set(crtc, red,
616 green, blue, pindex + i);
617 }
618
619 fb_helper->funcs->gamma_get(crtc, &r,
620 &g, &b,
621 pindex >> 1);
622
623 for (i = 0; i < 4; i++)
624 fb_helper->funcs->gamma_set(crtc, r,
625 green, b,
626 (pindex >> 1) + i);
627 }
628 }
629
630 if (fb->depth != 16)
631 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
632 return 0;
633 }
634
635 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
636 {
637 struct drm_fb_helper *fb_helper = info->par;
638 struct drm_crtc_helper_funcs *crtc_funcs;
639 u16 *red, *green, *blue, *transp;
640 struct drm_crtc *crtc;
641 int i, j, rc = 0;
642 int start;
643
644 for (i = 0; i < fb_helper->crtc_count; i++) {
645 crtc = fb_helper->crtc_info[i].mode_set.crtc;
646 crtc_funcs = crtc->helper_private;
647
648 red = cmap->red;
649 green = cmap->green;
650 blue = cmap->blue;
651 transp = cmap->transp;
652 start = cmap->start;
653
654 for (j = 0; j < cmap->len; j++) {
655 u16 hred, hgreen, hblue, htransp = 0xffff;
656
657 hred = *red++;
658 hgreen = *green++;
659 hblue = *blue++;
660
661 if (transp)
662 htransp = *transp++;
663
664 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
665 if (rc)
666 return rc;
667 }
668 crtc_funcs->load_lut(crtc);
669 }
670 return rc;
671 }
672 EXPORT_SYMBOL(drm_fb_helper_setcmap);
673
674 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
675 struct fb_info *info)
676 {
677 struct drm_fb_helper *fb_helper = info->par;
678 struct drm_framebuffer *fb = fb_helper->fb;
679 int depth;
680
681 if (var->pixclock != 0 || in_dbg_master())
682 return -EINVAL;
683
684 /* Need to resize the fb object !!! */
685 if (var->bits_per_pixel > fb->bits_per_pixel ||
686 var->xres > fb->width || var->yres > fb->height ||
687 var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
688 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
689 "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",
690 var->xres, var->yres, var->bits_per_pixel,
691 var->xres_virtual, var->yres_virtual,
692 fb->width, fb->height, fb->bits_per_pixel);
693 return -EINVAL;
694 }
695
696 switch (var->bits_per_pixel) {
697 case 16:
698 depth = (var->green.length == 6) ? 16 : 15;
699 break;
700 case 32:
701 depth = (var->transp.length > 0) ? 32 : 24;
702 break;
703 default:
704 depth = var->bits_per_pixel;
705 break;
706 }
707
708 switch (depth) {
709 case 8:
710 var->red.offset = 0;
711 var->green.offset = 0;
712 var->blue.offset = 0;
713 var->red.length = 8;
714 var->green.length = 8;
715 var->blue.length = 8;
716 var->transp.length = 0;
717 var->transp.offset = 0;
718 break;
719 case 15:
720 var->red.offset = 10;
721 var->green.offset = 5;
722 var->blue.offset = 0;
723 var->red.length = 5;
724 var->green.length = 5;
725 var->blue.length = 5;
726 var->transp.length = 1;
727 var->transp.offset = 15;
728 break;
729 case 16:
730 var->red.offset = 11;
731 var->green.offset = 5;
732 var->blue.offset = 0;
733 var->red.length = 5;
734 var->green.length = 6;
735 var->blue.length = 5;
736 var->transp.length = 0;
737 var->transp.offset = 0;
738 break;
739 case 24:
740 var->red.offset = 16;
741 var->green.offset = 8;
742 var->blue.offset = 0;
743 var->red.length = 8;
744 var->green.length = 8;
745 var->blue.length = 8;
746 var->transp.length = 0;
747 var->transp.offset = 0;
748 break;
749 case 32:
750 var->red.offset = 16;
751 var->green.offset = 8;
752 var->blue.offset = 0;
753 var->red.length = 8;
754 var->green.length = 8;
755 var->blue.length = 8;
756 var->transp.length = 8;
757 var->transp.offset = 24;
758 break;
759 default:
760 return -EINVAL;
761 }
762 return 0;
763 }
764 EXPORT_SYMBOL(drm_fb_helper_check_var);
765
766 /* this will let fbcon do the mode init */
767 int drm_fb_helper_set_par(struct fb_info *info)
768 {
769 struct drm_fb_helper *fb_helper = info->par;
770 struct drm_device *dev = fb_helper->dev;
771 struct fb_var_screeninfo *var = &info->var;
772 struct drm_crtc *crtc;
773 int ret;
774 int i;
775
776 if (var->pixclock != 0) {
777 DRM_ERROR("PIXEL CLOCK SET\n");
778 return -EINVAL;
779 }
780
781 sx_xlock(&dev->mode_config.mutex);
782 for (i = 0; i < fb_helper->crtc_count; i++) {
783 crtc = fb_helper->crtc_info[i].mode_set.crtc;
784 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
785 if (ret) {
786 sx_xunlock(&dev->mode_config.mutex);
787 return ret;
788 }
789 }
790 sx_xunlock(&dev->mode_config.mutex);
791
792 if (fb_helper->delayed_hotplug) {
793 fb_helper->delayed_hotplug = false;
794 drm_fb_helper_hotplug_event(fb_helper);
795 }
796 return 0;
797 }
798 EXPORT_SYMBOL(drm_fb_helper_set_par);
799
800 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
801 struct fb_info *info)
802 {
803 struct drm_fb_helper *fb_helper = info->par;
804 struct drm_device *dev = fb_helper->dev;
805 struct drm_mode_set *modeset;
806 struct drm_crtc *crtc;
807 int ret = 0;
808 int i;
809
810 sx_xlock(&dev->mode_config.mutex);
811 for (i = 0; i < fb_helper->crtc_count; i++) {
812 crtc = fb_helper->crtc_info[i].mode_set.crtc;
813
814 modeset = &fb_helper->crtc_info[i].mode_set;
815
816 modeset->x = var->xoffset;
817 modeset->y = var->yoffset;
818
819 if (modeset->num_connectors) {
820 ret = crtc->funcs->set_config(modeset);
821 if (!ret) {
822 info->var.xoffset = var->xoffset;
823 info->var.yoffset = var->yoffset;
824 }
825 }
826 }
827 sx_xunlock(&dev->mode_config.mutex);
828 return ret;
829 }
830 EXPORT_SYMBOL(drm_fb_helper_pan_display);
831 #endif /* FREEBSD_NOTYET */
832
drm_fb_helper_single_fb_probe(struct drm_fb_helper * fb_helper,int preferred_bpp)833 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
834 int preferred_bpp)
835 {
836 int new_fb = 0;
837 int crtc_count = 0;
838 int i;
839 struct fb_info *info;
840 struct drm_fb_helper_surface_size sizes;
841 int gamma_size = 0;
842 #if defined(__FreeBSD__)
843 struct drm_crtc *crtc;
844 struct drm_device *dev;
845 int ret;
846 device_t kdev;
847 #endif
848
849 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
850 sizes.surface_depth = 24;
851 sizes.surface_bpp = 32;
852 sizes.fb_width = (unsigned)-1;
853 sizes.fb_height = (unsigned)-1;
854
855 /* if driver picks 8 or 16 by default use that
856 for both depth/bpp */
857 if (preferred_bpp != sizes.surface_bpp)
858 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
859
860 /* first up get a count of crtcs now in use and new min/maxes width/heights */
861 for (i = 0; i < fb_helper->connector_count; i++) {
862 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
863 struct drm_cmdline_mode *cmdline_mode;
864
865 cmdline_mode = &fb_helper_conn->cmdline_mode;
866
867 if (cmdline_mode->bpp_specified) {
868 switch (cmdline_mode->bpp) {
869 case 8:
870 sizes.surface_depth = sizes.surface_bpp = 8;
871 break;
872 case 15:
873 sizes.surface_depth = 15;
874 sizes.surface_bpp = 16;
875 break;
876 case 16:
877 sizes.surface_depth = sizes.surface_bpp = 16;
878 break;
879 case 24:
880 sizes.surface_depth = sizes.surface_bpp = 24;
881 break;
882 case 32:
883 sizes.surface_depth = 24;
884 sizes.surface_bpp = 32;
885 break;
886 }
887 break;
888 }
889 }
890
891 crtc_count = 0;
892 for (i = 0; i < fb_helper->crtc_count; i++) {
893 struct drm_display_mode *desired_mode;
894 desired_mode = fb_helper->crtc_info[i].desired_mode;
895
896 if (desired_mode) {
897 if (gamma_size == 0)
898 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
899 if (desired_mode->hdisplay < sizes.fb_width)
900 sizes.fb_width = desired_mode->hdisplay;
901 if (desired_mode->vdisplay < sizes.fb_height)
902 sizes.fb_height = desired_mode->vdisplay;
903 if (desired_mode->hdisplay > sizes.surface_width)
904 sizes.surface_width = desired_mode->hdisplay;
905 if (desired_mode->vdisplay > sizes.surface_height)
906 sizes.surface_height = desired_mode->vdisplay;
907 crtc_count++;
908 }
909 }
910
911 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
912 /* hmm everyone went away - assume VGA cable just fell out
913 and will come back later. */
914 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
915 sizes.fb_width = sizes.surface_width = 1024;
916 sizes.fb_height = sizes.surface_height = 768;
917 }
918
919 /* push down into drivers */
920 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
921 if (new_fb < 0)
922 return new_fb;
923
924 info = fb_helper->fbdev;
925
926 kdev = fb_helper->dev->dev;
927 info->fb_video_dev = device_get_parent(kdev);
928
929 /* set the fb pointer */
930 for (i = 0; i < fb_helper->crtc_count; i++)
931 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
932
933 #if defined(__FreeBSD__)
934 if (new_fb) {
935 int ret;
936
937 info->fb_fbd_dev = device_add_child(kdev, "fbd",
938 device_get_unit(kdev));
939 if (info->fb_fbd_dev != NULL)
940 ret = device_probe_and_attach(info->fb_fbd_dev);
941 else
942 ret = ENODEV;
943 #ifdef DEV_VT
944 if (ret != 0)
945 DRM_ERROR("Failed to attach fbd device: %d\n", ret);
946 #endif
947 } else {
948 /* Modified version of drm_fb_helper_set_par() */
949 dev = fb_helper->dev;
950 sx_xlock(&dev->mode_config.mutex);
951 for (i = 0; i < fb_helper->crtc_count; i++) {
952 crtc = fb_helper->crtc_info[i].mode_set.crtc;
953 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
954 if (ret) {
955 sx_xunlock(&dev->mode_config.mutex);
956 return ret;
957 }
958 }
959 sx_xunlock(&dev->mode_config.mutex);
960
961 if (fb_helper->delayed_hotplug) {
962 fb_helper->delayed_hotplug = false;
963 drm_fb_helper_hotplug_event(fb_helper);
964 }
965 }
966 #else
967 if (new_fb) {
968 info->var.pixclock = 0;
969 if (register_framebuffer(info) < 0)
970 return -EINVAL;
971
972 dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n",
973 info->node, info->fix.id);
974
975 } else {
976 drm_fb_helper_set_par(info);
977 }
978 #endif
979
980 #if 0 && defined(FREEBSD_NOTYET)
981 /* Switch back to kernel console on panic */
982 /* multi card linked list maybe */
983 if (list_empty(&kernel_fb_helper_list)) {
984 dev_info(fb_helper->dev->dev, "registered panic notifier\n");
985 atomic_notifier_chain_register(&panic_notifier_list,
986 &paniced);
987 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
988 }
989 #endif /* FREEBSD_NOTYET */
990 if (new_fb)
991 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
992
993 return 0;
994 }
995 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
996
drm_fb_helper_fill_fix(struct fb_info * info,uint32_t pitch,uint32_t depth)997 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
998 uint32_t depth)
999 {
1000 info->fb_stride = pitch;
1001
1002 return;
1003 }
1004 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
1005
drm_fb_helper_fill_var(struct fb_info * info,struct drm_fb_helper * fb_helper,uint32_t fb_width,uint32_t fb_height)1006 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1007 uint32_t fb_width, uint32_t fb_height)
1008 {
1009 struct drm_framebuffer *fb = fb_helper->fb;
1010 struct vt_kms_softc *sc;
1011
1012 info->fb_name = device_get_nameunit(fb_helper->dev->dev);
1013 info->fb_width = fb->width;
1014 info->fb_height = fb->height;
1015 info->fb_depth = fb->bits_per_pixel;
1016
1017 sc = (struct vt_kms_softc *)info->fb_priv;
1018 sc->fb_helper = fb_helper;
1019 }
1020 EXPORT_SYMBOL(drm_fb_helper_fill_var);
1021
drm_fb_helper_probe_connector_modes(struct drm_fb_helper * fb_helper,uint32_t maxX,uint32_t maxY)1022 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1023 uint32_t maxX,
1024 uint32_t maxY)
1025 {
1026 struct drm_connector *connector;
1027 int count = 0;
1028 int i;
1029
1030 for (i = 0; i < fb_helper->connector_count; i++) {
1031 connector = fb_helper->connector_info[i]->connector;
1032 count += connector->funcs->fill_modes(connector, maxX, maxY);
1033 }
1034
1035 return count;
1036 }
1037
drm_has_preferred_mode(struct drm_fb_helper_connector * fb_connector,int width,int height)1038 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1039 {
1040 struct drm_display_mode *mode;
1041
1042 list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1043 if (drm_mode_width(mode) > width ||
1044 drm_mode_height(mode) > height)
1045 continue;
1046 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1047 return mode;
1048 }
1049 return NULL;
1050 }
1051
drm_has_cmdline_mode(struct drm_fb_helper_connector * fb_connector)1052 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1053 {
1054 struct drm_cmdline_mode *cmdline_mode;
1055 cmdline_mode = &fb_connector->cmdline_mode;
1056 return cmdline_mode->specified;
1057 }
1058
drm_pick_cmdline_mode(struct drm_fb_helper_connector * fb_helper_conn,int width,int height)1059 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1060 int width, int height)
1061 {
1062 struct drm_cmdline_mode *cmdline_mode;
1063 struct drm_display_mode *mode = NULL;
1064
1065 cmdline_mode = &fb_helper_conn->cmdline_mode;
1066 if (cmdline_mode->specified == false)
1067 return mode;
1068
1069 /* attempt to find a matching mode in the list of modes
1070 * we have gotten so far, if not add a CVT mode that conforms
1071 */
1072 if (cmdline_mode->rb || cmdline_mode->margins)
1073 goto create_mode;
1074
1075 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1076 /* check width/height */
1077 if (mode->hdisplay != cmdline_mode->xres ||
1078 mode->vdisplay != cmdline_mode->yres)
1079 continue;
1080
1081 if (cmdline_mode->refresh_specified) {
1082 if (mode->vrefresh != cmdline_mode->refresh)
1083 continue;
1084 }
1085
1086 if (cmdline_mode->interlace) {
1087 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1088 continue;
1089 }
1090 return mode;
1091 }
1092
1093 create_mode:
1094 mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev,
1095 cmdline_mode);
1096 list_add(&mode->head, &fb_helper_conn->connector->modes);
1097 return mode;
1098 }
1099
drm_connector_enabled(struct drm_connector * connector,bool strict)1100 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1101 {
1102 bool enable;
1103
1104 if (strict)
1105 enable = connector->status == connector_status_connected;
1106 else
1107 enable = connector->status != connector_status_disconnected;
1108
1109 return enable;
1110 }
1111
drm_enable_connectors(struct drm_fb_helper * fb_helper,bool * enabled)1112 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1113 bool *enabled)
1114 {
1115 bool any_enabled = false;
1116 struct drm_connector *connector;
1117 int i = 0;
1118
1119 for (i = 0; i < fb_helper->connector_count; i++) {
1120 connector = fb_helper->connector_info[i]->connector;
1121 enabled[i] = drm_connector_enabled(connector, true);
1122 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1123 enabled[i] ? "yes" : "no");
1124 any_enabled |= enabled[i];
1125 }
1126
1127 if (any_enabled)
1128 return;
1129
1130 for (i = 0; i < fb_helper->connector_count; i++) {
1131 connector = fb_helper->connector_info[i]->connector;
1132 enabled[i] = drm_connector_enabled(connector, false);
1133 }
1134 }
1135
drm_target_cloned(struct drm_fb_helper * fb_helper,struct drm_display_mode ** modes,bool * enabled,int width,int height)1136 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1137 struct drm_display_mode **modes,
1138 bool *enabled, int width, int height)
1139 {
1140 int count, i, j;
1141 bool can_clone = false;
1142 struct drm_fb_helper_connector *fb_helper_conn;
1143 struct drm_display_mode *dmt_mode, *mode;
1144
1145 /* only contemplate cloning in the single crtc case */
1146 if (fb_helper->crtc_count > 1)
1147 return false;
1148
1149 count = 0;
1150 for (i = 0; i < fb_helper->connector_count; i++) {
1151 if (enabled[i])
1152 count++;
1153 }
1154
1155 /* only contemplate cloning if more than one connector is enabled */
1156 if (count <= 1)
1157 return false;
1158
1159 /* check the command line or if nothing common pick 1024x768 */
1160 can_clone = true;
1161 for (i = 0; i < fb_helper->connector_count; i++) {
1162 if (!enabled[i])
1163 continue;
1164 fb_helper_conn = fb_helper->connector_info[i];
1165 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1166 if (!modes[i]) {
1167 can_clone = false;
1168 break;
1169 }
1170 for (j = 0; j < i; j++) {
1171 if (!enabled[j])
1172 continue;
1173 if (!drm_mode_equal(modes[j], modes[i]))
1174 can_clone = false;
1175 }
1176 }
1177
1178 if (can_clone) {
1179 DRM_DEBUG_KMS("can clone using command line\n");
1180 return true;
1181 }
1182
1183 /* try and find a 1024x768 mode on each connector */
1184 can_clone = true;
1185 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false);
1186
1187 for (i = 0; i < fb_helper->connector_count; i++) {
1188
1189 if (!enabled[i])
1190 continue;
1191
1192 fb_helper_conn = fb_helper->connector_info[i];
1193 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1194 if (drm_mode_equal(mode, dmt_mode))
1195 modes[i] = mode;
1196 }
1197 if (!modes[i])
1198 can_clone = false;
1199 }
1200
1201 if (can_clone) {
1202 DRM_DEBUG_KMS("can clone using 1024x768\n");
1203 return true;
1204 }
1205 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1206 return false;
1207 }
1208
drm_target_preferred(struct drm_fb_helper * fb_helper,struct drm_display_mode ** modes,bool * enabled,int width,int height)1209 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1210 struct drm_display_mode **modes,
1211 bool *enabled, int width, int height)
1212 {
1213 struct drm_fb_helper_connector *fb_helper_conn;
1214 int i;
1215
1216 for (i = 0; i < fb_helper->connector_count; i++) {
1217 fb_helper_conn = fb_helper->connector_info[i];
1218
1219 if (enabled[i] == false)
1220 continue;
1221
1222 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1223 fb_helper_conn->connector->base.id);
1224
1225 /* got for command line mode first */
1226 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1227 if (!modes[i]) {
1228 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1229 fb_helper_conn->connector->base.id);
1230 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1231 }
1232 /* No preferred modes, pick one off the list */
1233 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1234 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1235 break;
1236 }
1237 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1238 "none");
1239 }
1240 return true;
1241 }
1242
drm_pick_crtcs(struct drm_fb_helper * fb_helper,struct drm_fb_helper_crtc ** best_crtcs,struct drm_display_mode ** modes,int n,int width,int height)1243 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1244 struct drm_fb_helper_crtc **best_crtcs,
1245 struct drm_display_mode **modes,
1246 int n, int width, int height)
1247 {
1248 int c, o;
1249 struct drm_device *dev = fb_helper->dev;
1250 struct drm_connector *connector;
1251 struct drm_connector_helper_funcs *connector_funcs;
1252 struct drm_encoder *encoder;
1253 int my_score, best_score, score;
1254 struct drm_fb_helper_crtc **crtcs, *crtc;
1255 struct drm_fb_helper_connector *fb_helper_conn;
1256
1257 if (n == fb_helper->connector_count)
1258 return 0;
1259
1260 fb_helper_conn = fb_helper->connector_info[n];
1261 connector = fb_helper_conn->connector;
1262
1263 best_crtcs[n] = NULL;
1264 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1265 if (modes[n] == NULL)
1266 return best_score;
1267
1268 crtcs = malloc(dev->mode_config.num_connector *
1269 sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS, M_NOWAIT | M_ZERO);
1270 if (!crtcs)
1271 return best_score;
1272
1273 my_score = 1;
1274 if (connector->status == connector_status_connected)
1275 my_score++;
1276 if (drm_has_cmdline_mode(fb_helper_conn))
1277 my_score++;
1278 if (drm_has_preferred_mode(fb_helper_conn, width, height))
1279 my_score++;
1280
1281 connector_funcs = connector->helper_private;
1282 encoder = connector_funcs->best_encoder(connector);
1283 if (!encoder)
1284 goto out;
1285
1286 /* select a crtc for this connector and then attempt to configure
1287 remaining connectors */
1288 for (c = 0; c < fb_helper->crtc_count; c++) {
1289 crtc = &fb_helper->crtc_info[c];
1290
1291 if ((encoder->possible_crtcs & (1 << c)) == 0)
1292 continue;
1293
1294 for (o = 0; o < n; o++)
1295 if (best_crtcs[o] == crtc)
1296 break;
1297
1298 if (o < n) {
1299 /* ignore cloning unless only a single crtc */
1300 if (fb_helper->crtc_count > 1)
1301 continue;
1302
1303 if (!drm_mode_equal(modes[o], modes[n]))
1304 continue;
1305 }
1306
1307 crtcs[n] = crtc;
1308 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1309 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1310 width, height);
1311 if (score > best_score) {
1312 best_score = score;
1313 memcpy(best_crtcs, crtcs,
1314 dev->mode_config.num_connector *
1315 sizeof(struct drm_fb_helper_crtc *));
1316 }
1317 }
1318 out:
1319 free(crtcs, DRM_MEM_KMS);
1320 return best_score;
1321 }
1322
drm_setup_crtcs(struct drm_fb_helper * fb_helper)1323 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1324 {
1325 struct drm_device *dev = fb_helper->dev;
1326 struct drm_fb_helper_crtc **crtcs;
1327 struct drm_display_mode **modes;
1328 struct drm_mode_set *modeset;
1329 bool *enabled;
1330 int width, height;
1331 int i, ret;
1332
1333 DRM_DEBUG_KMS("\n");
1334
1335 width = dev->mode_config.max_width;
1336 height = dev->mode_config.max_height;
1337
1338 crtcs = malloc(dev->mode_config.num_connector *
1339 sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS, M_NOWAIT | M_ZERO);
1340 modes = malloc(dev->mode_config.num_connector *
1341 sizeof(struct drm_display_mode *), DRM_MEM_KMS, M_NOWAIT | M_ZERO);
1342 enabled = malloc(dev->mode_config.num_connector *
1343 sizeof(bool), DRM_MEM_KMS, M_NOWAIT | M_ZERO);
1344 if (!crtcs || !modes || !enabled) {
1345 DRM_ERROR("Memory allocation failed\n");
1346 goto out;
1347 }
1348
1349
1350 drm_enable_connectors(fb_helper, enabled);
1351
1352 ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1353 if (!ret) {
1354 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1355 if (!ret)
1356 DRM_ERROR("Unable to find initial modes\n");
1357 }
1358
1359 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1360
1361 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1362
1363 /* need to set the modesets up here for use later */
1364 /* fill out the connector<->crtc mappings into the modesets */
1365 for (i = 0; i < fb_helper->crtc_count; i++) {
1366 modeset = &fb_helper->crtc_info[i].mode_set;
1367 modeset->num_connectors = 0;
1368 }
1369
1370 for (i = 0; i < fb_helper->connector_count; i++) {
1371 struct drm_display_mode *mode = modes[i];
1372 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1373 modeset = &fb_crtc->mode_set;
1374
1375 if (mode && fb_crtc) {
1376 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1377 mode->name, fb_crtc->mode_set.crtc->base.id);
1378 fb_crtc->desired_mode = mode;
1379 if (modeset->mode)
1380 drm_mode_destroy(dev, modeset->mode);
1381 modeset->mode = drm_mode_duplicate(dev,
1382 fb_crtc->desired_mode);
1383 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1384 }
1385 }
1386
1387 out:
1388 free(crtcs, DRM_MEM_KMS);
1389 free(modes, DRM_MEM_KMS);
1390 free(enabled, DRM_MEM_KMS);
1391 }
1392
1393 /**
1394 * drm_helper_initial_config - setup a sane initial connector configuration
1395 * @fb_helper: fb_helper device struct
1396 * @bpp_sel: bpp value to use for the framebuffer configuration
1397 *
1398 * LOCKING:
1399 * Called at init time by the driver to set up the @fb_helper initial
1400 * configuration, must take the mode config lock.
1401 *
1402 * Scans the CRTCs and connectors and tries to put together an initial setup.
1403 * At the moment, this is a cloned configuration across all heads with
1404 * a new framebuffer object as the backing store.
1405 *
1406 * RETURNS:
1407 * Zero if everything went ok, nonzero otherwise.
1408 */
drm_fb_helper_initial_config(struct drm_fb_helper * fb_helper,int bpp_sel)1409 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1410 {
1411 struct drm_device *dev = fb_helper->dev;
1412 int count = 0;
1413
1414 /* disable all the possible outputs/crtcs before entering KMS mode */
1415 drm_helper_disable_unused_functions(fb_helper->dev);
1416
1417 drm_fb_helper_parse_command_line(fb_helper);
1418
1419 count = drm_fb_helper_probe_connector_modes(fb_helper,
1420 dev->mode_config.max_width,
1421 dev->mode_config.max_height);
1422 /*
1423 * we shouldn't end up with no modes here.
1424 */
1425 if (count == 0)
1426 dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n");
1427
1428 drm_setup_crtcs(fb_helper);
1429
1430 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1431 }
1432 EXPORT_SYMBOL(drm_fb_helper_initial_config);
1433
1434 /**
1435 * drm_fb_helper_hotplug_event - respond to a hotplug notification by
1436 * probing all the outputs attached to the fb
1437 * @fb_helper: the drm_fb_helper
1438 *
1439 * LOCKING:
1440 * Called at runtime, must take mode config lock.
1441 *
1442 * Scan the connectors attached to the fb_helper and try to put together a
1443 * setup after *notification of a change in output configuration.
1444 *
1445 * RETURNS:
1446 * 0 on success and a non-zero error code otherwise.
1447 */
drm_fb_helper_hotplug_event(struct drm_fb_helper * fb_helper)1448 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1449 {
1450 struct drm_device *dev = fb_helper->dev;
1451 u32 max_width, max_height, bpp_sel;
1452 int bound = 0, crtcs_bound = 0;
1453 struct drm_crtc *crtc;
1454
1455 if (!fb_helper->fb)
1456 return 0;
1457
1458 sx_xlock(&dev->mode_config.mutex);
1459 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1460 if (crtc->fb)
1461 crtcs_bound++;
1462 if (crtc->fb == fb_helper->fb)
1463 bound++;
1464 }
1465
1466 if (bound < crtcs_bound) {
1467 fb_helper->delayed_hotplug = true;
1468 sx_xunlock(&dev->mode_config.mutex);
1469 return 0;
1470 }
1471 DRM_DEBUG_KMS("\n");
1472
1473 max_width = fb_helper->fb->width;
1474 max_height = fb_helper->fb->height;
1475 bpp_sel = fb_helper->fb->bits_per_pixel;
1476
1477 drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1478 max_height);
1479 drm_setup_crtcs(fb_helper);
1480 sx_xunlock(&dev->mode_config.mutex);
1481
1482 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1483 }
1484 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
1485