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ocfs2: Make the left masklogs compat.
[taoma-kernel.git] / drivers / gpu / drm / drm_fb_helper.c
blobf73ef4390db615fc499742af6b29f3aed6dae833
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 #include <linux/kernel.h>
31 #include <linux/sysrq.h>
32 #include <linux/slab.h>
33 #include <linux/fb.h>
34 #include "drmP.h"
35 #include "drm_crtc.h"
36 #include "drm_fb_helper.h"
37 #include "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 LIST_HEAD(kernel_fb_helper_list);
44
45 /* simple single crtc case helper function */
46 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
47 {
48 struct drm_device *dev = fb_helper->dev;
49 struct drm_connector *connector;
50 int i;
51
52 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
53 struct drm_fb_helper_connector *fb_helper_connector;
54
55 fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
56 if (!fb_helper_connector)
57 goto fail;
58
59 fb_helper_connector->connector = connector;
60 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
61 }
62 return 0;
63 fail:
64 for (i = 0; i < fb_helper->connector_count; i++) {
65 kfree(fb_helper->connector_info[i]);
66 fb_helper->connector_info[i] = NULL;
67 }
68 fb_helper->connector_count = 0;
69 return -ENOMEM;
70 }
71 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
72
73 /**
74 * drm_fb_helper_connector_parse_command_line - parse command line for connector
75 * @connector - connector to parse line for
76 * @mode_option - per connector mode option
77 *
78 * This parses the connector specific then generic command lines for
79 * modes and options to configure the connector.
80 *
81 * This uses the same parameters as the fb modedb.c, except for extra
82 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
83 *
84 * enable/enable Digital/disable bit at the end
85 */
86 static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn,
87 const char *mode_option)
88 {
89 const char *name;
90 unsigned int namelen;
91 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
92 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
93 int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
94 int i;
95 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
96 struct drm_fb_helper_cmdline_mode *cmdline_mode;
97 struct drm_connector *connector;
98
99 if (!fb_helper_conn)
100 return false;
101 connector = fb_helper_conn->connector;
102
103 cmdline_mode = &fb_helper_conn->cmdline_mode;
104 if (!mode_option)
105 mode_option = fb_mode_option;
106
107 if (!mode_option) {
108 cmdline_mode->specified = false;
109 return false;
110 }
111
112 name = mode_option;
113 namelen = strlen(name);
114 for (i = namelen-1; i >= 0; i--) {
115 switch (name[i]) {
116 case '@':
117 namelen = i;
118 if (!refresh_specified && !bpp_specified &&
119 !yres_specified) {
120 refresh = simple_strtol(&name[i+1], NULL, 10);
121 refresh_specified = 1;
122 if (cvt || rb)
123 cvt = 0;
124 } else
125 goto done;
126 break;
127 case '-':
128 namelen = i;
129 if (!bpp_specified && !yres_specified) {
130 bpp = simple_strtol(&name[i+1], NULL, 10);
131 bpp_specified = 1;
132 if (cvt || rb)
133 cvt = 0;
134 } else
135 goto done;
136 break;
137 case 'x':
138 if (!yres_specified) {
139 yres = simple_strtol(&name[i+1], NULL, 10);
140 yres_specified = 1;
141 } else
142 goto done;
143 case '0' ... '9':
144 break;
145 case 'M':
146 if (!yres_specified)
147 cvt = 1;
148 break;
149 case 'R':
150 if (cvt)
151 rb = 1;
152 break;
153 case 'm':
154 if (!cvt)
155 margins = 1;
156 break;
157 case 'i':
158 if (!cvt)
159 interlace = 1;
160 break;
161 case 'e':
162 force = DRM_FORCE_ON;
163 break;
164 case 'D':
165 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
166 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
167 force = DRM_FORCE_ON;
168 else
169 force = DRM_FORCE_ON_DIGITAL;
170 break;
171 case 'd':
172 force = DRM_FORCE_OFF;
173 break;
174 default:
175 goto done;
176 }
177 }
178 if (i < 0 && yres_specified) {
179 xres = simple_strtol(name, NULL, 10);
180 res_specified = 1;
181 }
182 done:
183
184 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
185 drm_get_connector_name(connector), xres, yres,
186 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
187 "", (margins) ? " with margins" : "", (interlace) ?
188 " interlaced" : "");
189
190 if (force) {
191 const char *s;
192 switch (force) {
193 case DRM_FORCE_OFF: s = "OFF"; break;
194 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
195 default:
196 case DRM_FORCE_ON: s = "ON"; break;
197 }
198
199 DRM_INFO("forcing %s connector %s\n",
200 drm_get_connector_name(connector), s);
201 connector->force = force;
202 }
203
204 if (res_specified) {
205 cmdline_mode->specified = true;
206 cmdline_mode->xres = xres;
207 cmdline_mode->yres = yres;
208 }
209
210 if (refresh_specified) {
211 cmdline_mode->refresh_specified = true;
212 cmdline_mode->refresh = refresh;
213 }
214
215 if (bpp_specified) {
216 cmdline_mode->bpp_specified = true;
217 cmdline_mode->bpp = bpp;
218 }
219 cmdline_mode->rb = rb ? true : false;
220 cmdline_mode->cvt = cvt ? true : false;
221 cmdline_mode->interlace = interlace ? true : false;
222
223 return true;
224 }
225
226 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
227 {
228 struct drm_fb_helper_connector *fb_helper_conn;
229 int i;
230
231 for (i = 0; i < fb_helper->connector_count; i++) {
232 char *option = NULL;
233
234 fb_helper_conn = fb_helper->connector_info[i];
235
236 /* do something on return - turn off connector maybe */
237 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
238 continue;
239
240 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
241 }
242 return 0;
243 }
244
245 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
246 {
247 uint16_t *r_base, *g_base, *b_base;
248 int i;
249
250 r_base = crtc->gamma_store;
251 g_base = r_base + crtc->gamma_size;
252 b_base = g_base + crtc->gamma_size;
253
254 for (i = 0; i < crtc->gamma_size; i++)
255 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
256 }
257
258 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
259 {
260 uint16_t *r_base, *g_base, *b_base;
261
262 r_base = crtc->gamma_store;
263 g_base = r_base + crtc->gamma_size;
264 b_base = g_base + crtc->gamma_size;
265
266 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
267 }
268
269 int drm_fb_helper_debug_enter(struct fb_info *info)
270 {
271 struct drm_fb_helper *helper = info->par;
272 struct drm_crtc_helper_funcs *funcs;
273 int i;
274
275 if (list_empty(&kernel_fb_helper_list))
276 return false;
277
278 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
279 for (i = 0; i < helper->crtc_count; i++) {
280 struct drm_mode_set *mode_set =
281 &helper->crtc_info[i].mode_set;
282
283 if (!mode_set->crtc->enabled)
284 continue;
285
286 funcs = mode_set->crtc->helper_private;
287 drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
288 funcs->mode_set_base_atomic(mode_set->crtc,
289 mode_set->fb,
290 mode_set->x,
291 mode_set->y,
292 ENTER_ATOMIC_MODE_SET);
293 }
294 }
295
296 return 0;
297 }
298 EXPORT_SYMBOL(drm_fb_helper_debug_enter);
299
300 /* Find the real fb for a given fb helper CRTC */
301 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
302 {
303 struct drm_device *dev = crtc->dev;
304 struct drm_crtc *c;
305
306 list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
307 if (crtc->base.id == c->base.id)
308 return c->fb;
309 }
310
311 return NULL;
312 }
313
314 int drm_fb_helper_debug_leave(struct fb_info *info)
315 {
316 struct drm_fb_helper *helper = info->par;
317 struct drm_crtc *crtc;
318 struct drm_crtc_helper_funcs *funcs;
319 struct drm_framebuffer *fb;
320 int i;
321
322 for (i = 0; i < helper->crtc_count; i++) {
323 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
324 crtc = mode_set->crtc;
325 funcs = crtc->helper_private;
326 fb = drm_mode_config_fb(crtc);
327
328 if (!crtc->enabled)
329 continue;
330
331 if (!fb) {
332 DRM_ERROR("no fb to restore??\n");
333 continue;
334 }
335
336 drm_fb_helper_restore_lut_atomic(mode_set->crtc);
337 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
338 crtc->y, LEAVE_ATOMIC_MODE_SET);
339 }
340
341 return 0;
342 }
343 EXPORT_SYMBOL(drm_fb_helper_debug_leave);
344
345 bool drm_fb_helper_force_kernel_mode(void)
346 {
347 int i = 0;
348 bool ret, error = false;
349 struct drm_fb_helper *helper;
350
351 if (list_empty(&kernel_fb_helper_list))
352 return false;
353
354 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
355 for (i = 0; i < helper->crtc_count; i++) {
356 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
357 ret = drm_crtc_helper_set_config(mode_set);
358 if (ret)
359 error = true;
360 }
361 }
362 return error;
363 }
364
365 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
366 void *panic_str)
367 {
368 printk(KERN_ERR "panic occurred, switching back to text console\n");
369 return drm_fb_helper_force_kernel_mode();
370 return 0;
371 }
372 EXPORT_SYMBOL(drm_fb_helper_panic);
373
374 static struct notifier_block paniced = {
375 .notifier_call = drm_fb_helper_panic,
376 };
377
378 /**
379 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
380 *
381 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
382 */
383 void drm_fb_helper_restore(void)
384 {
385 bool ret;
386 ret = drm_fb_helper_force_kernel_mode();
387 if (ret == true)
388 DRM_ERROR("Failed to restore crtc configuration\n");
389 }
390 EXPORT_SYMBOL(drm_fb_helper_restore);
391
392 #ifdef CONFIG_MAGIC_SYSRQ
393 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
394 {
395 drm_fb_helper_restore();
396 }
397 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
398
399 static void drm_fb_helper_sysrq(int dummy1)
400 {
401 schedule_work(&drm_fb_helper_restore_work);
402 }
403
404 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
405 .handler = drm_fb_helper_sysrq,
406 .help_msg = "force-fb(V)",
407 .action_msg = "Restore framebuffer console",
408 };
409 #else
410 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
411 #endif
412
413 static void drm_fb_helper_on(struct fb_info *info)
414 {
415 struct drm_fb_helper *fb_helper = info->par;
416 struct drm_device *dev = fb_helper->dev;
417 struct drm_crtc *crtc;
418 struct drm_crtc_helper_funcs *crtc_funcs;
419 struct drm_connector *connector;
420 struct drm_encoder *encoder;
421 int i, j;
422
423 /*
424 * For each CRTC in this fb, turn the crtc on then,
425 * find all associated encoders and turn them on.
426 */
427 mutex_lock(&dev->mode_config.mutex);
428 for (i = 0; i < fb_helper->crtc_count; i++) {
429 crtc = fb_helper->crtc_info[i].mode_set.crtc;
430 crtc_funcs = crtc->helper_private;
431
432 if (!crtc->enabled)
433 continue;
434
435 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
436
437 /* Walk the connectors & encoders on this fb turning them on */
438 for (j = 0; j < fb_helper->connector_count; j++) {
439 connector = fb_helper->connector_info[j]->connector;
440 connector->dpms = DRM_MODE_DPMS_ON;
441 drm_connector_property_set_value(connector,
442 dev->mode_config.dpms_property,
443 DRM_MODE_DPMS_ON);
444 }
445 /* Found a CRTC on this fb, now find encoders */
446 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
447 if (encoder->crtc == crtc) {
448 struct drm_encoder_helper_funcs *encoder_funcs;
449
450 encoder_funcs = encoder->helper_private;
451 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
452 }
453 }
454 }
455 mutex_unlock(&dev->mode_config.mutex);
456 }
457
458 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
459 {
460 struct drm_fb_helper *fb_helper = info->par;
461 struct drm_device *dev = fb_helper->dev;
462 struct drm_crtc *crtc;
463 struct drm_crtc_helper_funcs *crtc_funcs;
464 struct drm_connector *connector;
465 struct drm_encoder *encoder;
466 int i, j;
467
468 /*
469 * For each CRTC in this fb, find all associated encoders
470 * and turn them off, then turn off the CRTC.
471 */
472 mutex_lock(&dev->mode_config.mutex);
473 for (i = 0; i < fb_helper->crtc_count; i++) {
474 crtc = fb_helper->crtc_info[i].mode_set.crtc;
475 crtc_funcs = crtc->helper_private;
476
477 if (!crtc->enabled)
478 continue;
479
480 /* Walk the connectors on this fb and mark them off */
481 for (j = 0; j < fb_helper->connector_count; j++) {
482 connector = fb_helper->connector_info[j]->connector;
483 connector->dpms = dpms_mode;
484 drm_connector_property_set_value(connector,
485 dev->mode_config.dpms_property,
486 dpms_mode);
487 }
488 /* Found a CRTC on this fb, now find encoders */
489 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
490 if (encoder->crtc == crtc) {
491 struct drm_encoder_helper_funcs *encoder_funcs;
492
493 encoder_funcs = encoder->helper_private;
494 encoder_funcs->dpms(encoder, dpms_mode);
495 }
496 }
497 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
498 }
499 mutex_unlock(&dev->mode_config.mutex);
500 }
501
502 int drm_fb_helper_blank(int blank, struct fb_info *info)
503 {
504 switch (blank) {
505 /* Display: On; HSync: On, VSync: On */
506 case FB_BLANK_UNBLANK:
507 drm_fb_helper_on(info);
508 break;
509 /* Display: Off; HSync: On, VSync: On */
510 case FB_BLANK_NORMAL:
511 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
512 break;
513 /* Display: Off; HSync: Off, VSync: On */
514 case FB_BLANK_HSYNC_SUSPEND:
515 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
516 break;
517 /* Display: Off; HSync: On, VSync: Off */
518 case FB_BLANK_VSYNC_SUSPEND:
519 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
520 break;
521 /* Display: Off; HSync: Off, VSync: Off */
522 case FB_BLANK_POWERDOWN:
523 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
524 break;
525 }
526 return 0;
527 }
528 EXPORT_SYMBOL(drm_fb_helper_blank);
529
530 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
531 {
532 int i;
533
534 for (i = 0; i < helper->connector_count; i++)
535 kfree(helper->connector_info[i]);
536 kfree(helper->connector_info);
537 for (i = 0; i < helper->crtc_count; i++)
538 kfree(helper->crtc_info[i].mode_set.connectors);
539 kfree(helper->crtc_info);
540 }
541
542 int drm_fb_helper_init(struct drm_device *dev,
543 struct drm_fb_helper *fb_helper,
544 int crtc_count, int max_conn_count)
545 {
546 struct drm_crtc *crtc;
547 int ret = 0;
548 int i;
549
550 fb_helper->dev = dev;
551
552 INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
553
554 fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
555 if (!fb_helper->crtc_info)
556 return -ENOMEM;
557
558 fb_helper->crtc_count = crtc_count;
559 fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
560 if (!fb_helper->connector_info) {
561 kfree(fb_helper->crtc_info);
562 return -ENOMEM;
563 }
564 fb_helper->connector_count = 0;
565
566 for (i = 0; i < crtc_count; i++) {
567 fb_helper->crtc_info[i].mode_set.connectors =
568 kcalloc(max_conn_count,
569 sizeof(struct drm_connector *),
570 GFP_KERNEL);
571
572 if (!fb_helper->crtc_info[i].mode_set.connectors) {
573 ret = -ENOMEM;
574 goto out_free;
575 }
576 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
577 }
578
579 i = 0;
580 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
581 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
582 fb_helper->crtc_info[i].mode_set.crtc = crtc;
583 i++;
584 }
585 fb_helper->conn_limit = max_conn_count;
586 return 0;
587 out_free:
588 drm_fb_helper_crtc_free(fb_helper);
589 return -ENOMEM;
590 }
591 EXPORT_SYMBOL(drm_fb_helper_init);
592
593 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
594 {
595 if (!list_empty(&fb_helper->kernel_fb_list)) {
596 list_del(&fb_helper->kernel_fb_list);
597 if (list_empty(&kernel_fb_helper_list)) {
598 printk(KERN_INFO "drm: unregistered panic notifier\n");
599 atomic_notifier_chain_unregister(&panic_notifier_list,
600 &paniced);
601 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
602 }
603 }
604
605 drm_fb_helper_crtc_free(fb_helper);
606
607 }
608 EXPORT_SYMBOL(drm_fb_helper_fini);
609
610 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
611 u16 blue, u16 regno, struct fb_info *info)
612 {
613 struct drm_fb_helper *fb_helper = info->par;
614 struct drm_framebuffer *fb = fb_helper->fb;
615 int pindex;
616
617 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
618 u32 *palette;
619 u32 value;
620 /* place color in psuedopalette */
621 if (regno > 16)
622 return -EINVAL;
623 palette = (u32 *)info->pseudo_palette;
624 red >>= (16 - info->var.red.length);
625 green >>= (16 - info->var.green.length);
626 blue >>= (16 - info->var.blue.length);
627 value = (red << info->var.red.offset) |
628 (green << info->var.green.offset) |
629 (blue << info->var.blue.offset);
630 palette[regno] = value;
631 return 0;
632 }
633
634 pindex = regno;
635
636 if (fb->bits_per_pixel == 16) {
637 pindex = regno << 3;
638
639 if (fb->depth == 16 && regno > 63)
640 return -EINVAL;
641 if (fb->depth == 15 && regno > 31)
642 return -EINVAL;
643
644 if (fb->depth == 16) {
645 u16 r, g, b;
646 int i;
647 if (regno < 32) {
648 for (i = 0; i < 8; i++)
649 fb_helper->funcs->gamma_set(crtc, red,
650 green, blue, pindex + i);
651 }
652
653 fb_helper->funcs->gamma_get(crtc, &r,
654 &g, &b,
655 pindex >> 1);
656
657 for (i = 0; i < 4; i++)
658 fb_helper->funcs->gamma_set(crtc, r,
659 green, b,
660 (pindex >> 1) + i);
661 }
662 }
663
664 if (fb->depth != 16)
665 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
666 return 0;
667 }
668
669 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
670 {
671 struct drm_fb_helper *fb_helper = info->par;
672 struct drm_crtc_helper_funcs *crtc_funcs;
673 u16 *red, *green, *blue, *transp;
674 struct drm_crtc *crtc;
675 int i, j, rc = 0;
676 int start;
677
678 for (i = 0; i < fb_helper->crtc_count; i++) {
679 crtc = fb_helper->crtc_info[i].mode_set.crtc;
680 crtc_funcs = crtc->helper_private;
681
682 red = cmap->red;
683 green = cmap->green;
684 blue = cmap->blue;
685 transp = cmap->transp;
686 start = cmap->start;
687
688 for (j = 0; j < cmap->len; j++) {
689 u16 hred, hgreen, hblue, htransp = 0xffff;
690
691 hred = *red++;
692 hgreen = *green++;
693 hblue = *blue++;
694
695 if (transp)
696 htransp = *transp++;
697
698 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
699 if (rc)
700 return rc;
701 }
702 crtc_funcs->load_lut(crtc);
703 }
704 return rc;
705 }
706 EXPORT_SYMBOL(drm_fb_helper_setcmap);
707
708 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
709 struct fb_info *info)
710 {
711 struct drm_fb_helper *fb_helper = info->par;
712 struct drm_framebuffer *fb = fb_helper->fb;
713 int depth;
714
715 if (var->pixclock != 0 || in_dbg_master())
716 return -EINVAL;
717
718 /* Need to resize the fb object !!! */
719 if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
720 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
721 "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
722 fb->width, fb->height, fb->bits_per_pixel);
723 return -EINVAL;
724 }
725
726 switch (var->bits_per_pixel) {
727 case 16:
728 depth = (var->green.length == 6) ? 16 : 15;
729 break;
730 case 32:
731 depth = (var->transp.length > 0) ? 32 : 24;
732 break;
733 default:
734 depth = var->bits_per_pixel;
735 break;
736 }
737
738 switch (depth) {
739 case 8:
740 var->red.offset = 0;
741 var->green.offset = 0;
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 15:
750 var->red.offset = 10;
751 var->green.offset = 5;
752 var->blue.offset = 0;
753 var->red.length = 5;
754 var->green.length = 5;
755 var->blue.length = 5;
756 var->transp.length = 1;
757 var->transp.offset = 15;
758 break;
759 case 16:
760 var->red.offset = 11;
761 var->green.offset = 5;
762 var->blue.offset = 0;
763 var->red.length = 5;
764 var->green.length = 6;
765 var->blue.length = 5;
766 var->transp.length = 0;
767 var->transp.offset = 0;
768 break;
769 case 24:
770 var->red.offset = 16;
771 var->green.offset = 8;
772 var->blue.offset = 0;
773 var->red.length = 8;
774 var->green.length = 8;
775 var->blue.length = 8;
776 var->transp.length = 0;
777 var->transp.offset = 0;
778 break;
779 case 32:
780 var->red.offset = 16;
781 var->green.offset = 8;
782 var->blue.offset = 0;
783 var->red.length = 8;
784 var->green.length = 8;
785 var->blue.length = 8;
786 var->transp.length = 8;
787 var->transp.offset = 24;
788 break;
789 default:
790 return -EINVAL;
791 }
792 return 0;
793 }
794 EXPORT_SYMBOL(drm_fb_helper_check_var);
795
796 /* this will let fbcon do the mode init */
797 int drm_fb_helper_set_par(struct fb_info *info)
798 {
799 struct drm_fb_helper *fb_helper = info->par;
800 struct drm_device *dev = fb_helper->dev;
801 struct fb_var_screeninfo *var = &info->var;
802 struct drm_crtc *crtc;
803 int ret;
804 int i;
805
806 if (var->pixclock != 0) {
807 DRM_ERROR("PIXEL CLOCK SET\n");
808 return -EINVAL;
809 }
810
811 mutex_lock(&dev->mode_config.mutex);
812 for (i = 0; i < fb_helper->crtc_count; i++) {
813 crtc = fb_helper->crtc_info[i].mode_set.crtc;
814 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
815 if (ret) {
816 mutex_unlock(&dev->mode_config.mutex);
817 return ret;
818 }
819 }
820 mutex_unlock(&dev->mode_config.mutex);
821
822 if (fb_helper->delayed_hotplug) {
823 fb_helper->delayed_hotplug = false;
824 drm_fb_helper_hotplug_event(fb_helper);
825 }
826 return 0;
827 }
828 EXPORT_SYMBOL(drm_fb_helper_set_par);
829
830 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
831 struct fb_info *info)
832 {
833 struct drm_fb_helper *fb_helper = info->par;
834 struct drm_device *dev = fb_helper->dev;
835 struct drm_mode_set *modeset;
836 struct drm_crtc *crtc;
837 int ret = 0;
838 int i;
839
840 mutex_lock(&dev->mode_config.mutex);
841 for (i = 0; i < fb_helper->crtc_count; i++) {
842 crtc = fb_helper->crtc_info[i].mode_set.crtc;
843
844 modeset = &fb_helper->crtc_info[i].mode_set;
845
846 modeset->x = var->xoffset;
847 modeset->y = var->yoffset;
848
849 if (modeset->num_connectors) {
850 ret = crtc->funcs->set_config(modeset);
851 if (!ret) {
852 info->var.xoffset = var->xoffset;
853 info->var.yoffset = var->yoffset;
854 }
855 }
856 }
857 mutex_unlock(&dev->mode_config.mutex);
858 return ret;
859 }
860 EXPORT_SYMBOL(drm_fb_helper_pan_display);
861
862 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
863 int preferred_bpp)
864 {
865 int new_fb = 0;
866 int crtc_count = 0;
867 int i;
868 struct fb_info *info;
869 struct drm_fb_helper_surface_size sizes;
870 int gamma_size = 0;
871
872 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
873 sizes.surface_depth = 24;
874 sizes.surface_bpp = 32;
875 sizes.fb_width = (unsigned)-1;
876 sizes.fb_height = (unsigned)-1;
877
878 /* if driver picks 8 or 16 by default use that
879 for both depth/bpp */
880 if (preferred_bpp != sizes.surface_bpp) {
881 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
882 }
883 /* first up get a count of crtcs now in use and new min/maxes width/heights */
884 for (i = 0; i < fb_helper->connector_count; i++) {
885 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
886 struct drm_fb_helper_cmdline_mode *cmdline_mode;
887
888 cmdline_mode = &fb_helper_conn->cmdline_mode;
889
890 if (cmdline_mode->bpp_specified) {
891 switch (cmdline_mode->bpp) {
892 case 8:
893 sizes.surface_depth = sizes.surface_bpp = 8;
894 break;
895 case 15:
896 sizes.surface_depth = 15;
897 sizes.surface_bpp = 16;
898 break;
899 case 16:
900 sizes.surface_depth = sizes.surface_bpp = 16;
901 break;
902 case 24:
903 sizes.surface_depth = sizes.surface_bpp = 24;
904 break;
905 case 32:
906 sizes.surface_depth = 24;
907 sizes.surface_bpp = 32;
908 break;
909 }
910 break;
911 }
912 }
913
914 crtc_count = 0;
915 for (i = 0; i < fb_helper->crtc_count; i++) {
916 struct drm_display_mode *desired_mode;
917 desired_mode = fb_helper->crtc_info[i].desired_mode;
918
919 if (desired_mode) {
920 if (gamma_size == 0)
921 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
922 if (desired_mode->hdisplay < sizes.fb_width)
923 sizes.fb_width = desired_mode->hdisplay;
924 if (desired_mode->vdisplay < sizes.fb_height)
925 sizes.fb_height = desired_mode->vdisplay;
926 if (desired_mode->hdisplay > sizes.surface_width)
927 sizes.surface_width = desired_mode->hdisplay;
928 if (desired_mode->vdisplay > sizes.surface_height)
929 sizes.surface_height = desired_mode->vdisplay;
930 crtc_count++;
931 }
932 }
933
934 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
935 /* hmm everyone went away - assume VGA cable just fell out
936 and will come back later. */
937 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
938 sizes.fb_width = sizes.surface_width = 1024;
939 sizes.fb_height = sizes.surface_height = 768;
940 }
941
942 /* push down into drivers */
943 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
944 if (new_fb < 0)
945 return new_fb;
946
947 info = fb_helper->fbdev;
948
949 /* set the fb pointer */
950 for (i = 0; i < fb_helper->crtc_count; i++) {
951 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
952 }
953
954 if (new_fb) {
955 info->var.pixclock = 0;
956 if (register_framebuffer(info) < 0) {
957 return -EINVAL;
958 }
959
960 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
961 info->fix.id);
962
963 } else {
964 drm_fb_helper_set_par(info);
965 }
966
967 /* Switch back to kernel console on panic */
968 /* multi card linked list maybe */
969 if (list_empty(&kernel_fb_helper_list)) {
970 printk(KERN_INFO "drm: registered panic notifier\n");
971 atomic_notifier_chain_register(&panic_notifier_list,
972 &paniced);
973 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
974 }
975 if (new_fb)
976 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
977
978 return 0;
979 }
980 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
981
982 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
983 uint32_t depth)
984 {
985 info->fix.type = FB_TYPE_PACKED_PIXELS;
986 info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
987 FB_VISUAL_TRUECOLOR;
988 info->fix.mmio_start = 0;
989 info->fix.mmio_len = 0;
990 info->fix.type_aux = 0;
991 info->fix.xpanstep = 1; /* doing it in hw */
992 info->fix.ypanstep = 1; /* doing it in hw */
993 info->fix.ywrapstep = 0;
994 info->fix.accel = FB_ACCEL_NONE;
995 info->fix.type_aux = 0;
996
997 info->fix.line_length = pitch;
998 return;
999 }
1000 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
1001
1002 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1003 uint32_t fb_width, uint32_t fb_height)
1004 {
1005 struct drm_framebuffer *fb = fb_helper->fb;
1006 info->pseudo_palette = fb_helper->pseudo_palette;
1007 info->var.xres_virtual = fb->width;
1008 info->var.yres_virtual = fb->height;
1009 info->var.bits_per_pixel = fb->bits_per_pixel;
1010 info->var.accel_flags = FB_ACCELF_TEXT;
1011 info->var.xoffset = 0;
1012 info->var.yoffset = 0;
1013 info->var.activate = FB_ACTIVATE_NOW;
1014 info->var.height = -1;
1015 info->var.width = -1;
1016
1017 switch (fb->depth) {
1018 case 8:
1019 info->var.red.offset = 0;
1020 info->var.green.offset = 0;
1021 info->var.blue.offset = 0;
1022 info->var.red.length = 8; /* 8bit DAC */
1023 info->var.green.length = 8;
1024 info->var.blue.length = 8;
1025 info->var.transp.offset = 0;
1026 info->var.transp.length = 0;
1027 break;
1028 case 15:
1029 info->var.red.offset = 10;
1030 info->var.green.offset = 5;
1031 info->var.blue.offset = 0;
1032 info->var.red.length = 5;
1033 info->var.green.length = 5;
1034 info->var.blue.length = 5;
1035 info->var.transp.offset = 15;
1036 info->var.transp.length = 1;
1037 break;
1038 case 16:
1039 info->var.red.offset = 11;
1040 info->var.green.offset = 5;
1041 info->var.blue.offset = 0;
1042 info->var.red.length = 5;
1043 info->var.green.length = 6;
1044 info->var.blue.length = 5;
1045 info->var.transp.offset = 0;
1046 break;
1047 case 24:
1048 info->var.red.offset = 16;
1049 info->var.green.offset = 8;
1050 info->var.blue.offset = 0;
1051 info->var.red.length = 8;
1052 info->var.green.length = 8;
1053 info->var.blue.length = 8;
1054 info->var.transp.offset = 0;
1055 info->var.transp.length = 0;
1056 break;
1057 case 32:
1058 info->var.red.offset = 16;
1059 info->var.green.offset = 8;
1060 info->var.blue.offset = 0;
1061 info->var.red.length = 8;
1062 info->var.green.length = 8;
1063 info->var.blue.length = 8;
1064 info->var.transp.offset = 24;
1065 info->var.transp.length = 8;
1066 break;
1067 default:
1068 break;
1069 }
1070
1071 info->var.xres = fb_width;
1072 info->var.yres = fb_height;
1073 }
1074 EXPORT_SYMBOL(drm_fb_helper_fill_var);
1075
1076 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1077 uint32_t maxX,
1078 uint32_t maxY)
1079 {
1080 struct drm_connector *connector;
1081 int count = 0;
1082 int i;
1083
1084 for (i = 0; i < fb_helper->connector_count; i++) {
1085 connector = fb_helper->connector_info[i]->connector;
1086 count += connector->funcs->fill_modes(connector, maxX, maxY);
1087 }
1088
1089 return count;
1090 }
1091
1092 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1093 {
1094 struct drm_display_mode *mode;
1095
1096 list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1097 if (drm_mode_width(mode) > width ||
1098 drm_mode_height(mode) > height)
1099 continue;
1100 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1101 return mode;
1102 }
1103 return NULL;
1104 }
1105
1106 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1107 {
1108 struct drm_fb_helper_cmdline_mode *cmdline_mode;
1109 cmdline_mode = &fb_connector->cmdline_mode;
1110 return cmdline_mode->specified;
1111 }
1112
1113 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1114 int width, int height)
1115 {
1116 struct drm_fb_helper_cmdline_mode *cmdline_mode;
1117 struct drm_display_mode *mode = NULL;
1118
1119 cmdline_mode = &fb_helper_conn->cmdline_mode;
1120 if (cmdline_mode->specified == false)
1121 return mode;
1122
1123 /* attempt to find a matching mode in the list of modes
1124 * we have gotten so far, if not add a CVT mode that conforms
1125 */
1126 if (cmdline_mode->rb || cmdline_mode->margins)
1127 goto create_mode;
1128
1129 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1130 /* check width/height */
1131 if (mode->hdisplay != cmdline_mode->xres ||
1132 mode->vdisplay != cmdline_mode->yres)
1133 continue;
1134
1135 if (cmdline_mode->refresh_specified) {
1136 if (mode->vrefresh != cmdline_mode->refresh)
1137 continue;
1138 }
1139
1140 if (cmdline_mode->interlace) {
1141 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1142 continue;
1143 }
1144 return mode;
1145 }
1146
1147 create_mode:
1148 if (cmdline_mode->cvt)
1149 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1150 cmdline_mode->xres, cmdline_mode->yres,
1151 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1152 cmdline_mode->rb, cmdline_mode->interlace,
1153 cmdline_mode->margins);
1154 else
1155 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1156 cmdline_mode->xres, cmdline_mode->yres,
1157 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1158 cmdline_mode->interlace,
1159 cmdline_mode->margins);
1160 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1161 list_add(&mode->head, &fb_helper_conn->connector->modes);
1162 return mode;
1163 }
1164
1165 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1166 {
1167 bool enable;
1168
1169 if (strict) {
1170 enable = connector->status == connector_status_connected;
1171 } else {
1172 enable = connector->status != connector_status_disconnected;
1173 }
1174 return enable;
1175 }
1176
1177 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1178 bool *enabled)
1179 {
1180 bool any_enabled = false;
1181 struct drm_connector *connector;
1182 int i = 0;
1183
1184 for (i = 0; i < fb_helper->connector_count; i++) {
1185 connector = fb_helper->connector_info[i]->connector;
1186 enabled[i] = drm_connector_enabled(connector, true);
1187 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1188 enabled[i] ? "yes" : "no");
1189 any_enabled |= enabled[i];
1190 }
1191
1192 if (any_enabled)
1193 return;
1194
1195 for (i = 0; i < fb_helper->connector_count; i++) {
1196 connector = fb_helper->connector_info[i]->connector;
1197 enabled[i] = drm_connector_enabled(connector, false);
1198 }
1199 }
1200
1201 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1202 struct drm_display_mode **modes,
1203 bool *enabled, int width, int height)
1204 {
1205 int count, i, j;
1206 bool can_clone = false;
1207 struct drm_fb_helper_connector *fb_helper_conn;
1208 struct drm_display_mode *dmt_mode, *mode;
1209
1210 /* only contemplate cloning in the single crtc case */
1211 if (fb_helper->crtc_count > 1)
1212 return false;
1213
1214 count = 0;
1215 for (i = 0; i < fb_helper->connector_count; i++) {
1216 if (enabled[i])
1217 count++;
1218 }
1219
1220 /* only contemplate cloning if more than one connector is enabled */
1221 if (count <= 1)
1222 return false;
1223
1224 /* check the command line or if nothing common pick 1024x768 */
1225 can_clone = true;
1226 for (i = 0; i < fb_helper->connector_count; i++) {
1227 if (!enabled[i])
1228 continue;
1229 fb_helper_conn = fb_helper->connector_info[i];
1230 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1231 if (!modes[i]) {
1232 can_clone = false;
1233 break;
1234 }
1235 for (j = 0; j < i; j++) {
1236 if (!enabled[j])
1237 continue;
1238 if (!drm_mode_equal(modes[j], modes[i]))
1239 can_clone = false;
1240 }
1241 }
1242
1243 if (can_clone) {
1244 DRM_DEBUG_KMS("can clone using command line\n");
1245 return true;
1246 }
1247
1248 /* try and find a 1024x768 mode on each connector */
1249 can_clone = true;
1250 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1251
1252 for (i = 0; i < fb_helper->connector_count; i++) {
1253
1254 if (!enabled[i])
1255 continue;
1256
1257 fb_helper_conn = fb_helper->connector_info[i];
1258 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1259 if (drm_mode_equal(mode, dmt_mode))
1260 modes[i] = mode;
1261 }
1262 if (!modes[i])
1263 can_clone = false;
1264 }
1265
1266 if (can_clone) {
1267 DRM_DEBUG_KMS("can clone using 1024x768\n");
1268 return true;
1269 }
1270 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1271 return false;
1272 }
1273
1274 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1275 struct drm_display_mode **modes,
1276 bool *enabled, int width, int height)
1277 {
1278 struct drm_fb_helper_connector *fb_helper_conn;
1279 int i;
1280
1281 for (i = 0; i < fb_helper->connector_count; i++) {
1282 fb_helper_conn = fb_helper->connector_info[i];
1283
1284 if (enabled[i] == false)
1285 continue;
1286
1287 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1288 fb_helper_conn->connector->base.id);
1289
1290 /* got for command line mode first */
1291 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1292 if (!modes[i]) {
1293 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1294 fb_helper_conn->connector->base.id);
1295 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1296 }
1297 /* No preferred modes, pick one off the list */
1298 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1299 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1300 break;
1301 }
1302 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1303 "none");
1304 }
1305 return true;
1306 }
1307
1308 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1309 struct drm_fb_helper_crtc **best_crtcs,
1310 struct drm_display_mode **modes,
1311 int n, int width, int height)
1312 {
1313 int c, o;
1314 struct drm_device *dev = fb_helper->dev;
1315 struct drm_connector *connector;
1316 struct drm_connector_helper_funcs *connector_funcs;
1317 struct drm_encoder *encoder;
1318 struct drm_fb_helper_crtc *best_crtc;
1319 int my_score, best_score, score;
1320 struct drm_fb_helper_crtc **crtcs, *crtc;
1321 struct drm_fb_helper_connector *fb_helper_conn;
1322
1323 if (n == fb_helper->connector_count)
1324 return 0;
1325
1326 fb_helper_conn = fb_helper->connector_info[n];
1327 connector = fb_helper_conn->connector;
1328
1329 best_crtcs[n] = NULL;
1330 best_crtc = NULL;
1331 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1332 if (modes[n] == NULL)
1333 return best_score;
1334
1335 crtcs = kzalloc(dev->mode_config.num_connector *
1336 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1337 if (!crtcs)
1338 return best_score;
1339
1340 my_score = 1;
1341 if (connector->status == connector_status_connected)
1342 my_score++;
1343 if (drm_has_cmdline_mode(fb_helper_conn))
1344 my_score++;
1345 if (drm_has_preferred_mode(fb_helper_conn, width, height))
1346 my_score++;
1347
1348 connector_funcs = connector->helper_private;
1349 encoder = connector_funcs->best_encoder(connector);
1350 if (!encoder)
1351 goto out;
1352
1353 /* select a crtc for this connector and then attempt to configure
1354 remaining connectors */
1355 for (c = 0; c < fb_helper->crtc_count; c++) {
1356 crtc = &fb_helper->crtc_info[c];
1357
1358 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1359 continue;
1360 }
1361
1362 for (o = 0; o < n; o++)
1363 if (best_crtcs[o] == crtc)
1364 break;
1365
1366 if (o < n) {
1367 /* ignore cloning unless only a single crtc */
1368 if (fb_helper->crtc_count > 1)
1369 continue;
1370
1371 if (!drm_mode_equal(modes[o], modes[n]))
1372 continue;
1373 }
1374
1375 crtcs[n] = crtc;
1376 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1377 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1378 width, height);
1379 if (score > best_score) {
1380 best_crtc = crtc;
1381 best_score = score;
1382 memcpy(best_crtcs, crtcs,
1383 dev->mode_config.num_connector *
1384 sizeof(struct drm_fb_helper_crtc *));
1385 }
1386 }
1387 out:
1388 kfree(crtcs);
1389 return best_score;
1390 }
1391
1392 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1393 {
1394 struct drm_device *dev = fb_helper->dev;
1395 struct drm_fb_helper_crtc **crtcs;
1396 struct drm_display_mode **modes;
1397 struct drm_encoder *encoder;
1398 struct drm_mode_set *modeset;
1399 bool *enabled;
1400 int width, height;
1401 int i, ret;
1402
1403 DRM_DEBUG_KMS("\n");
1404
1405 width = dev->mode_config.max_width;
1406 height = dev->mode_config.max_height;
1407
1408 /* clean out all the encoder/crtc combos */
1409 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1410 encoder->crtc = NULL;
1411 }
1412
1413 crtcs = kcalloc(dev->mode_config.num_connector,
1414 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1415 modes = kcalloc(dev->mode_config.num_connector,
1416 sizeof(struct drm_display_mode *), GFP_KERNEL);
1417 enabled = kcalloc(dev->mode_config.num_connector,
1418 sizeof(bool), GFP_KERNEL);
1419
1420 drm_enable_connectors(fb_helper, enabled);
1421
1422 ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1423 if (!ret) {
1424 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1425 if (!ret)
1426 DRM_ERROR("Unable to find initial modes\n");
1427 }
1428
1429 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1430
1431 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1432
1433 /* need to set the modesets up here for use later */
1434 /* fill out the connector<->crtc mappings into the modesets */
1435 for (i = 0; i < fb_helper->crtc_count; i++) {
1436 modeset = &fb_helper->crtc_info[i].mode_set;
1437 modeset->num_connectors = 0;
1438 }
1439
1440 for (i = 0; i < fb_helper->connector_count; i++) {
1441 struct drm_display_mode *mode = modes[i];
1442 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1443 modeset = &fb_crtc->mode_set;
1444
1445 if (mode && fb_crtc) {
1446 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1447 mode->name, fb_crtc->mode_set.crtc->base.id);
1448 fb_crtc->desired_mode = mode;
1449 if (modeset->mode)
1450 drm_mode_destroy(dev, modeset->mode);
1451 modeset->mode = drm_mode_duplicate(dev,
1452 fb_crtc->desired_mode);
1453 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1454 }
1455 }
1456
1457 kfree(crtcs);
1458 kfree(modes);
1459 kfree(enabled);
1460 }
1461
1462 /**
1463 * drm_helper_initial_config - setup a sane initial connector configuration
1464 * @dev: DRM device
1465 *
1466 * LOCKING:
1467 * Called at init time, must take mode config lock.
1468 *
1469 * Scan the CRTCs and connectors and try to put together an initial setup.
1470 * At the moment, this is a cloned configuration across all heads with
1471 * a new framebuffer object as the backing store.
1472 *
1473 * RETURNS:
1474 * Zero if everything went ok, nonzero otherwise.
1475 */
1476 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1477 {
1478 struct drm_device *dev = fb_helper->dev;
1479 int count = 0;
1480
1481 /* disable all the possible outputs/crtcs before entering KMS mode */
1482 drm_helper_disable_unused_functions(fb_helper->dev);
1483
1484 drm_fb_helper_parse_command_line(fb_helper);
1485
1486 count = drm_fb_helper_probe_connector_modes(fb_helper,
1487 dev->mode_config.max_width,
1488 dev->mode_config.max_height);
1489 /*
1490 * we shouldn't end up with no modes here.
1491 */
1492 if (count == 0) {
1493 printk(KERN_INFO "No connectors reported connected with modes\n");
1494 }
1495 drm_setup_crtcs(fb_helper);
1496
1497 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1498 }
1499 EXPORT_SYMBOL(drm_fb_helper_initial_config);
1500
1501 bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1502 {
1503 int count = 0;
1504 u32 max_width, max_height, bpp_sel;
1505 bool bound = false, crtcs_bound = false;
1506 struct drm_crtc *crtc;
1507
1508 if (!fb_helper->fb)
1509 return false;
1510
1511 list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) {
1512 if (crtc->fb)
1513 crtcs_bound = true;
1514 if (crtc->fb == fb_helper->fb)
1515 bound = true;
1516 }
1517
1518 if (!bound && crtcs_bound) {
1519 fb_helper->delayed_hotplug = true;
1520 return false;
1521 }
1522 DRM_DEBUG_KMS("\n");
1523
1524 max_width = fb_helper->fb->width;
1525 max_height = fb_helper->fb->height;
1526 bpp_sel = fb_helper->fb->bits_per_pixel;
1527
1528 count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1529 max_height);
1530 drm_setup_crtcs(fb_helper);
1531
1532 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1533 }
1534 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
1535
1536 /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
1537 * but the module doesn't depend on any fb console symbols. At least
1538 * attempt to load fbcon to avoid leaving the system without a usable console.
1539 */
1540 #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
1541 static int __init drm_fb_helper_modinit(void)
1542 {
1543 const char *name = "fbcon";
1544 struct module *fbcon;
1545
1546 mutex_lock(&module_mutex);
1547 fbcon = find_module(name);
1548 mutex_unlock(&module_mutex);
1549
1550 if (!fbcon)
1551 request_module_nowait(name);
1552 return 0;
1553 }
1554
1555 module_init(drm_fb_helper_modinit);
1556 #endif
The kernel tree for Tao Ma.