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drm/fbdev: rework output polling to be back in the core. (v4)
[linux-2.6/btrfs-unstable.git] / drivers / gpu / drm / drm_fb_helper.c
blobf7b8fca4bbbc74d1465b17f21d07114f171c6bc8
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 = fb_helper_conn->connector;
98
99 if (!fb_helper_conn)
100 return false;
101
102 cmdline_mode = &fb_helper_conn->cmdline_mode;
103 if (!mode_option)
104 mode_option = fb_mode_option;
105
106 if (!mode_option) {
107 cmdline_mode->specified = false;
108 return false;
109 }
110
111 name = mode_option;
112 namelen = strlen(name);
113 for (i = namelen-1; i >= 0; i--) {
114 switch (name[i]) {
115 case '@':
116 namelen = i;
117 if (!refresh_specified && !bpp_specified &&
118 !yres_specified) {
119 refresh = simple_strtol(&name[i+1], NULL, 10);
120 refresh_specified = 1;
121 if (cvt || rb)
122 cvt = 0;
123 } else
124 goto done;
125 break;
126 case '-':
127 namelen = i;
128 if (!bpp_specified && !yres_specified) {
129 bpp = simple_strtol(&name[i+1], NULL, 10);
130 bpp_specified = 1;
131 if (cvt || rb)
132 cvt = 0;
133 } else
134 goto done;
135 break;
136 case 'x':
137 if (!yres_specified) {
138 yres = simple_strtol(&name[i+1], NULL, 10);
139 yres_specified = 1;
140 } else
141 goto done;
142 case '0' ... '9':
143 break;
144 case 'M':
145 if (!yres_specified)
146 cvt = 1;
147 break;
148 case 'R':
149 if (!cvt)
150 rb = 1;
151 break;
152 case 'm':
153 if (!cvt)
154 margins = 1;
155 break;
156 case 'i':
157 if (!cvt)
158 interlace = 1;
159 break;
160 case 'e':
161 force = DRM_FORCE_ON;
162 break;
163 case 'D':
164 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
165 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
166 force = DRM_FORCE_ON;
167 else
168 force = DRM_FORCE_ON_DIGITAL;
169 break;
170 case 'd':
171 force = DRM_FORCE_OFF;
172 break;
173 default:
174 goto done;
175 }
176 }
177 if (i < 0 && yres_specified) {
178 xres = simple_strtol(name, NULL, 10);
179 res_specified = 1;
180 }
181 done:
182
183 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
184 drm_get_connector_name(connector), xres, yres,
185 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
186 "", (margins) ? " with margins" : "", (interlace) ?
187 " interlaced" : "");
188
189 if (force) {
190 const char *s;
191 switch (force) {
192 case DRM_FORCE_OFF: s = "OFF"; break;
193 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
194 default:
195 case DRM_FORCE_ON: s = "ON"; break;
196 }
197
198 DRM_INFO("forcing %s connector %s\n",
199 drm_get_connector_name(connector), s);
200 connector->force = force;
201 }
202
203 if (res_specified) {
204 cmdline_mode->specified = true;
205 cmdline_mode->xres = xres;
206 cmdline_mode->yres = yres;
207 }
208
209 if (refresh_specified) {
210 cmdline_mode->refresh_specified = true;
211 cmdline_mode->refresh = refresh;
212 }
213
214 if (bpp_specified) {
215 cmdline_mode->bpp_specified = true;
216 cmdline_mode->bpp = bpp;
217 }
218 cmdline_mode->rb = rb ? true : false;
219 cmdline_mode->cvt = cvt ? true : false;
220 cmdline_mode->interlace = interlace ? true : false;
221
222 return true;
223 }
224
225 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
226 {
227 struct drm_fb_helper_connector *fb_helper_conn;
228 int i;
229
230 for (i = 0; i < fb_helper->connector_count; i++) {
231 char *option = NULL;
232
233 fb_helper_conn = fb_helper->connector_info[i];
234
235 /* do something on return - turn off connector maybe */
236 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
237 continue;
238
239 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
240 }
241 return 0;
242 }
243
244 bool drm_fb_helper_force_kernel_mode(void)
245 {
246 int i = 0;
247 bool ret, error = false;
248 struct drm_fb_helper *helper;
249
250 if (list_empty(&kernel_fb_helper_list))
251 return false;
252
253 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
254 for (i = 0; i < helper->crtc_count; i++) {
255 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
256 ret = drm_crtc_helper_set_config(mode_set);
257 if (ret)
258 error = true;
259 }
260 }
261 return error;
262 }
263
264 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
265 void *panic_str)
266 {
267 DRM_ERROR("panic occurred, switching back to text console\n");
268 return drm_fb_helper_force_kernel_mode();
269 return 0;
270 }
271 EXPORT_SYMBOL(drm_fb_helper_panic);
272
273 static struct notifier_block paniced = {
274 .notifier_call = drm_fb_helper_panic,
275 };
276
277 /**
278 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
279 *
280 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
281 */
282 void drm_fb_helper_restore(void)
283 {
284 bool ret;
285 ret = drm_fb_helper_force_kernel_mode();
286 if (ret == true)
287 DRM_ERROR("Failed to restore crtc configuration\n");
288 }
289 EXPORT_SYMBOL(drm_fb_helper_restore);
290
291 #ifdef CONFIG_MAGIC_SYSRQ
292 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
293 {
294 drm_fb_helper_restore();
295 }
296 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
297
298 static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3)
299 {
300 schedule_work(&drm_fb_helper_restore_work);
301 }
302
303 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
304 .handler = drm_fb_helper_sysrq,
305 .help_msg = "force-fb(V)",
306 .action_msg = "Restore framebuffer console",
307 };
308 #else
309 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
310 #endif
311
312 static void drm_fb_helper_on(struct fb_info *info)
313 {
314 struct drm_fb_helper *fb_helper = info->par;
315 struct drm_device *dev = fb_helper->dev;
316 struct drm_crtc *crtc;
317 struct drm_crtc_helper_funcs *crtc_funcs;
318 struct drm_encoder *encoder;
319 int i;
320
321 /*
322 * For each CRTC in this fb, turn the crtc on then,
323 * find all associated encoders and turn them on.
324 */
325 mutex_lock(&dev->mode_config.mutex);
326 for (i = 0; i < fb_helper->crtc_count; i++) {
327 crtc = fb_helper->crtc_info[i].mode_set.crtc;
328 crtc_funcs = crtc->helper_private;
329
330 if (!crtc->enabled)
331 continue;
332
333 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
334
335
336 /* Found a CRTC on this fb, now find encoders */
337 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
338 if (encoder->crtc == crtc) {
339 struct drm_encoder_helper_funcs *encoder_funcs;
340
341 encoder_funcs = encoder->helper_private;
342 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
343 }
344 }
345 }
346 mutex_unlock(&dev->mode_config.mutex);
347 }
348
349 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
350 {
351 struct drm_fb_helper *fb_helper = info->par;
352 struct drm_device *dev = fb_helper->dev;
353 struct drm_crtc *crtc;
354 struct drm_crtc_helper_funcs *crtc_funcs;
355 struct drm_encoder *encoder;
356 int i;
357
358 /*
359 * For each CRTC in this fb, find all associated encoders
360 * and turn them off, then turn off the CRTC.
361 */
362 mutex_lock(&dev->mode_config.mutex);
363 for (i = 0; i < fb_helper->crtc_count; i++) {
364 crtc = fb_helper->crtc_info[i].mode_set.crtc;
365 crtc_funcs = crtc->helper_private;
366
367 if (!crtc->enabled)
368 continue;
369
370 /* Found a CRTC on this fb, now find encoders */
371 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
372 if (encoder->crtc == crtc) {
373 struct drm_encoder_helper_funcs *encoder_funcs;
374
375 encoder_funcs = encoder->helper_private;
376 encoder_funcs->dpms(encoder, dpms_mode);
377 }
378 }
379 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
380 }
381 mutex_unlock(&dev->mode_config.mutex);
382 }
383
384 int drm_fb_helper_blank(int blank, struct fb_info *info)
385 {
386 switch (blank) {
387 /* Display: On; HSync: On, VSync: On */
388 case FB_BLANK_UNBLANK:
389 drm_fb_helper_on(info);
390 break;
391 /* Display: Off; HSync: On, VSync: On */
392 case FB_BLANK_NORMAL:
393 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
394 break;
395 /* Display: Off; HSync: Off, VSync: On */
396 case FB_BLANK_HSYNC_SUSPEND:
397 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
398 break;
399 /* Display: Off; HSync: On, VSync: Off */
400 case FB_BLANK_VSYNC_SUSPEND:
401 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
402 break;
403 /* Display: Off; HSync: Off, VSync: Off */
404 case FB_BLANK_POWERDOWN:
405 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
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
416 for (i = 0; i < helper->connector_count; i++)
417 kfree(helper->connector_info[i]);
418 kfree(helper->connector_info);
419 for (i = 0; i < helper->crtc_count; i++)
420 kfree(helper->crtc_info[i].mode_set.connectors);
421 kfree(helper->crtc_info);
422 }
423
424 int drm_fb_helper_init(struct drm_device *dev,
425 struct drm_fb_helper *fb_helper,
426 int crtc_count, int max_conn_count)
427 {
428 struct drm_crtc *crtc;
429 int ret = 0;
430 int i;
431
432 fb_helper->dev = dev;
433
434 INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
435
436 fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
437 if (!fb_helper->crtc_info)
438 return -ENOMEM;
439
440 fb_helper->crtc_count = crtc_count;
441 fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
442 if (!fb_helper->connector_info) {
443 kfree(fb_helper->crtc_info);
444 return -ENOMEM;
445 }
446 fb_helper->connector_count = 0;
447
448 for (i = 0; i < crtc_count; i++) {
449 fb_helper->crtc_info[i].mode_set.connectors =
450 kcalloc(max_conn_count,
451 sizeof(struct drm_connector *),
452 GFP_KERNEL);
453
454 if (!fb_helper->crtc_info[i].mode_set.connectors) {
455 ret = -ENOMEM;
456 goto out_free;
457 }
458 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
459 }
460
461 i = 0;
462 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
463 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
464 fb_helper->crtc_info[i].mode_set.crtc = crtc;
465 i++;
466 }
467 fb_helper->conn_limit = max_conn_count;
468 return 0;
469 out_free:
470 drm_fb_helper_crtc_free(fb_helper);
471 return -ENOMEM;
472 }
473 EXPORT_SYMBOL(drm_fb_helper_init);
474
475 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
476 {
477 if (!list_empty(&fb_helper->kernel_fb_list)) {
478 list_del(&fb_helper->kernel_fb_list);
479 if (list_empty(&kernel_fb_helper_list)) {
480 printk(KERN_INFO "drm: unregistered panic notifier\n");
481 atomic_notifier_chain_unregister(&panic_notifier_list,
482 &paniced);
483 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
484 }
485 }
486
487 drm_fb_helper_crtc_free(fb_helper);
488
489 }
490 EXPORT_SYMBOL(drm_fb_helper_fini);
491
492 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
493 u16 blue, u16 regno, struct fb_info *info)
494 {
495 struct drm_fb_helper *fb_helper = info->par;
496 struct drm_framebuffer *fb = fb_helper->fb;
497 int pindex;
498
499 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
500 u32 *palette;
501 u32 value;
502 /* place color in psuedopalette */
503 if (regno > 16)
504 return -EINVAL;
505 palette = (u32 *)info->pseudo_palette;
506 red >>= (16 - info->var.red.length);
507 green >>= (16 - info->var.green.length);
508 blue >>= (16 - info->var.blue.length);
509 value = (red << info->var.red.offset) |
510 (green << info->var.green.offset) |
511 (blue << info->var.blue.offset);
512 palette[regno] = value;
513 return 0;
514 }
515
516 pindex = regno;
517
518 if (fb->bits_per_pixel == 16) {
519 pindex = regno << 3;
520
521 if (fb->depth == 16 && regno > 63)
522 return -EINVAL;
523 if (fb->depth == 15 && regno > 31)
524 return -EINVAL;
525
526 if (fb->depth == 16) {
527 u16 r, g, b;
528 int i;
529 if (regno < 32) {
530 for (i = 0; i < 8; i++)
531 fb_helper->funcs->gamma_set(crtc, red,
532 green, blue, pindex + i);
533 }
534
535 fb_helper->funcs->gamma_get(crtc, &r,
536 &g, &b,
537 pindex >> 1);
538
539 for (i = 0; i < 4; i++)
540 fb_helper->funcs->gamma_set(crtc, r,
541 green, b,
542 (pindex >> 1) + i);
543 }
544 }
545
546 if (fb->depth != 16)
547 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
548 return 0;
549 }
550
551 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
552 {
553 struct drm_fb_helper *fb_helper = info->par;
554 struct drm_crtc_helper_funcs *crtc_funcs;
555 u16 *red, *green, *blue, *transp;
556 struct drm_crtc *crtc;
557 int i, rc = 0;
558 int start;
559
560 for (i = 0; i < fb_helper->crtc_count; i++) {
561 crtc = fb_helper->crtc_info[i].mode_set.crtc;
562 crtc_funcs = crtc->helper_private;
563
564 red = cmap->red;
565 green = cmap->green;
566 blue = cmap->blue;
567 transp = cmap->transp;
568 start = cmap->start;
569
570 for (i = 0; i < cmap->len; i++) {
571 u16 hred, hgreen, hblue, htransp = 0xffff;
572
573 hred = *red++;
574 hgreen = *green++;
575 hblue = *blue++;
576
577 if (transp)
578 htransp = *transp++;
579
580 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
581 if (rc)
582 return rc;
583 }
584 crtc_funcs->load_lut(crtc);
585 }
586 return rc;
587 }
588 EXPORT_SYMBOL(drm_fb_helper_setcmap);
589
590 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
591 struct fb_info *info)
592 {
593 struct drm_fb_helper *fb_helper = info->par;
594 struct drm_framebuffer *fb = fb_helper->fb;
595 int depth;
596
597 if (var->pixclock != 0)
598 return -EINVAL;
599
600 /* Need to resize the fb object !!! */
601 if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
602 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
603 "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
604 fb->width, fb->height, fb->bits_per_pixel);
605 return -EINVAL;
606 }
607
608 switch (var->bits_per_pixel) {
609 case 16:
610 depth = (var->green.length == 6) ? 16 : 15;
611 break;
612 case 32:
613 depth = (var->transp.length > 0) ? 32 : 24;
614 break;
615 default:
616 depth = var->bits_per_pixel;
617 break;
618 }
619
620 switch (depth) {
621 case 8:
622 var->red.offset = 0;
623 var->green.offset = 0;
624 var->blue.offset = 0;
625 var->red.length = 8;
626 var->green.length = 8;
627 var->blue.length = 8;
628 var->transp.length = 0;
629 var->transp.offset = 0;
630 break;
631 case 15:
632 var->red.offset = 10;
633 var->green.offset = 5;
634 var->blue.offset = 0;
635 var->red.length = 5;
636 var->green.length = 5;
637 var->blue.length = 5;
638 var->transp.length = 1;
639 var->transp.offset = 15;
640 break;
641 case 16:
642 var->red.offset = 11;
643 var->green.offset = 5;
644 var->blue.offset = 0;
645 var->red.length = 5;
646 var->green.length = 6;
647 var->blue.length = 5;
648 var->transp.length = 0;
649 var->transp.offset = 0;
650 break;
651 case 24:
652 var->red.offset = 16;
653 var->green.offset = 8;
654 var->blue.offset = 0;
655 var->red.length = 8;
656 var->green.length = 8;
657 var->blue.length = 8;
658 var->transp.length = 0;
659 var->transp.offset = 0;
660 break;
661 case 32:
662 var->red.offset = 16;
663 var->green.offset = 8;
664 var->blue.offset = 0;
665 var->red.length = 8;
666 var->green.length = 8;
667 var->blue.length = 8;
668 var->transp.length = 8;
669 var->transp.offset = 24;
670 break;
671 default:
672 return -EINVAL;
673 }
674 return 0;
675 }
676 EXPORT_SYMBOL(drm_fb_helper_check_var);
677
678 /* this will let fbcon do the mode init */
679 int drm_fb_helper_set_par(struct fb_info *info)
680 {
681 struct drm_fb_helper *fb_helper = info->par;
682 struct drm_device *dev = fb_helper->dev;
683 struct fb_var_screeninfo *var = &info->var;
684 struct drm_crtc *crtc;
685 int ret;
686 int i;
687
688 if (var->pixclock != 0) {
689 DRM_ERROR("PIXEL CLOCK SET\n");
690 return -EINVAL;
691 }
692
693 mutex_lock(&dev->mode_config.mutex);
694 for (i = 0; i < fb_helper->crtc_count; i++) {
695 crtc = fb_helper->crtc_info[i].mode_set.crtc;
696 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
697 if (ret) {
698 mutex_unlock(&dev->mode_config.mutex);
699 return ret;
700 }
701 }
702 mutex_unlock(&dev->mode_config.mutex);
703
704 if (fb_helper->delayed_hotplug) {
705 fb_helper->delayed_hotplug = false;
706 drm_fb_helper_hotplug_event(fb_helper);
707 }
708 return 0;
709 }
710 EXPORT_SYMBOL(drm_fb_helper_set_par);
711
712 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
713 struct fb_info *info)
714 {
715 struct drm_fb_helper *fb_helper = info->par;
716 struct drm_device *dev = fb_helper->dev;
717 struct drm_mode_set *modeset;
718 struct drm_crtc *crtc;
719 int ret = 0;
720 int i;
721
722 mutex_lock(&dev->mode_config.mutex);
723 for (i = 0; i < fb_helper->crtc_count; i++) {
724 crtc = fb_helper->crtc_info[i].mode_set.crtc;
725
726 modeset = &fb_helper->crtc_info[i].mode_set;
727
728 modeset->x = var->xoffset;
729 modeset->y = var->yoffset;
730
731 if (modeset->num_connectors) {
732 ret = crtc->funcs->set_config(modeset);
733 if (!ret) {
734 info->var.xoffset = var->xoffset;
735 info->var.yoffset = var->yoffset;
736 }
737 }
738 }
739 mutex_unlock(&dev->mode_config.mutex);
740 return ret;
741 }
742 EXPORT_SYMBOL(drm_fb_helper_pan_display);
743
744 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
745 int preferred_bpp)
746 {
747 int new_fb = 0;
748 int crtc_count = 0;
749 int i;
750 struct fb_info *info;
751 struct drm_fb_helper_surface_size sizes;
752 int gamma_size = 0;
753
754 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
755 sizes.surface_depth = 24;
756 sizes.surface_bpp = 32;
757 sizes.fb_width = (unsigned)-1;
758 sizes.fb_height = (unsigned)-1;
759
760 /* if driver picks 8 or 16 by default use that
761 for both depth/bpp */
762 if (preferred_bpp != sizes.surface_bpp) {
763 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
764 }
765 /* first up get a count of crtcs now in use and new min/maxes width/heights */
766 for (i = 0; i < fb_helper->connector_count; i++) {
767 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
768 struct drm_fb_helper_cmdline_mode *cmdline_mode;
769
770 cmdline_mode = &fb_helper_conn->cmdline_mode;
771
772 if (cmdline_mode->bpp_specified) {
773 switch (cmdline_mode->bpp) {
774 case 8:
775 sizes.surface_depth = sizes.surface_bpp = 8;
776 break;
777 case 15:
778 sizes.surface_depth = 15;
779 sizes.surface_bpp = 16;
780 break;
781 case 16:
782 sizes.surface_depth = sizes.surface_bpp = 16;
783 break;
784 case 24:
785 sizes.surface_depth = sizes.surface_bpp = 24;
786 break;
787 case 32:
788 sizes.surface_depth = 24;
789 sizes.surface_bpp = 32;
790 break;
791 }
792 break;
793 }
794 }
795
796 crtc_count = 0;
797 for (i = 0; i < fb_helper->crtc_count; i++) {
798 struct drm_display_mode *desired_mode;
799 desired_mode = fb_helper->crtc_info[i].desired_mode;
800
801 if (desired_mode) {
802 if (gamma_size == 0)
803 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
804 if (desired_mode->hdisplay < sizes.fb_width)
805 sizes.fb_width = desired_mode->hdisplay;
806 if (desired_mode->vdisplay < sizes.fb_height)
807 sizes.fb_height = desired_mode->vdisplay;
808 if (desired_mode->hdisplay > sizes.surface_width)
809 sizes.surface_width = desired_mode->hdisplay;
810 if (desired_mode->vdisplay > sizes.surface_height)
811 sizes.surface_height = desired_mode->vdisplay;
812 crtc_count++;
813 }
814 }
815
816 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
817 /* hmm everyone went away - assume VGA cable just fell out
818 and will come back later. */
819 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
820 sizes.fb_width = sizes.surface_width = 1024;
821 sizes.fb_height = sizes.surface_height = 768;
822 }
823
824 /* push down into drivers */
825 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
826 if (new_fb < 0)
827 return new_fb;
828
829 info = fb_helper->fbdev;
830
831 /* set the fb pointer */
832 for (i = 0; i < fb_helper->crtc_count; i++) {
833 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
834 }
835
836 if (new_fb) {
837 info->var.pixclock = 0;
838 if (register_framebuffer(info) < 0) {
839 return -EINVAL;
840 }
841
842 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
843 info->fix.id);
844
845 } else {
846 drm_fb_helper_set_par(info);
847 }
848
849 /* Switch back to kernel console on panic */
850 /* multi card linked list maybe */
851 if (list_empty(&kernel_fb_helper_list)) {
852 printk(KERN_INFO "drm: registered panic notifier\n");
853 atomic_notifier_chain_register(&panic_notifier_list,
854 &paniced);
855 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
856 }
857 if (new_fb)
858 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
859
860 return 0;
861 }
862 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
863
864 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
865 uint32_t depth)
866 {
867 info->fix.type = FB_TYPE_PACKED_PIXELS;
868 info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
869 FB_VISUAL_TRUECOLOR;
870 info->fix.type_aux = 0;
871 info->fix.xpanstep = 1; /* doing it in hw */
872 info->fix.ypanstep = 1; /* doing it in hw */
873 info->fix.ywrapstep = 0;
874 info->fix.accel = FB_ACCEL_NONE;
875 info->fix.type_aux = 0;
876
877 info->fix.line_length = pitch;
878 return;
879 }
880 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
881
882 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
883 uint32_t fb_width, uint32_t fb_height)
884 {
885 struct drm_framebuffer *fb = fb_helper->fb;
886 info->pseudo_palette = fb_helper->pseudo_palette;
887 info->var.xres_virtual = fb->width;
888 info->var.yres_virtual = fb->height;
889 info->var.bits_per_pixel = fb->bits_per_pixel;
890 info->var.xoffset = 0;
891 info->var.yoffset = 0;
892 info->var.activate = FB_ACTIVATE_NOW;
893 info->var.height = -1;
894 info->var.width = -1;
895
896 switch (fb->depth) {
897 case 8:
898 info->var.red.offset = 0;
899 info->var.green.offset = 0;
900 info->var.blue.offset = 0;
901 info->var.red.length = 8; /* 8bit DAC */
902 info->var.green.length = 8;
903 info->var.blue.length = 8;
904 info->var.transp.offset = 0;
905 info->var.transp.length = 0;
906 break;
907 case 15:
908 info->var.red.offset = 10;
909 info->var.green.offset = 5;
910 info->var.blue.offset = 0;
911 info->var.red.length = 5;
912 info->var.green.length = 5;
913 info->var.blue.length = 5;
914 info->var.transp.offset = 15;
915 info->var.transp.length = 1;
916 break;
917 case 16:
918 info->var.red.offset = 11;
919 info->var.green.offset = 5;
920 info->var.blue.offset = 0;
921 info->var.red.length = 5;
922 info->var.green.length = 6;
923 info->var.blue.length = 5;
924 info->var.transp.offset = 0;
925 break;
926 case 24:
927 info->var.red.offset = 16;
928 info->var.green.offset = 8;
929 info->var.blue.offset = 0;
930 info->var.red.length = 8;
931 info->var.green.length = 8;
932 info->var.blue.length = 8;
933 info->var.transp.offset = 0;
934 info->var.transp.length = 0;
935 break;
936 case 32:
937 info->var.red.offset = 16;
938 info->var.green.offset = 8;
939 info->var.blue.offset = 0;
940 info->var.red.length = 8;
941 info->var.green.length = 8;
942 info->var.blue.length = 8;
943 info->var.transp.offset = 24;
944 info->var.transp.length = 8;
945 break;
946 default:
947 break;
948 }
949
950 info->var.xres = fb_width;
951 info->var.yres = fb_height;
952 }
953 EXPORT_SYMBOL(drm_fb_helper_fill_var);
954
955 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
956 uint32_t maxX,
957 uint32_t maxY)
958 {
959 struct drm_connector *connector;
960 int count = 0;
961 int i;
962
963 for (i = 0; i < fb_helper->connector_count; i++) {
964 connector = fb_helper->connector_info[i]->connector;
965 count += connector->funcs->fill_modes(connector, maxX, maxY);
966 }
967
968 return count;
969 }
970
971 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
972 {
973 struct drm_display_mode *mode;
974
975 list_for_each_entry(mode, &fb_connector->connector->modes, head) {
976 if (drm_mode_width(mode) > width ||
977 drm_mode_height(mode) > height)
978 continue;
979 if (mode->type & DRM_MODE_TYPE_PREFERRED)
980 return mode;
981 }
982 return NULL;
983 }
984
985 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
986 {
987 struct drm_fb_helper_cmdline_mode *cmdline_mode;
988 cmdline_mode = &fb_connector->cmdline_mode;
989 return cmdline_mode->specified;
990 }
991
992 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
993 int width, int height)
994 {
995 struct drm_fb_helper_cmdline_mode *cmdline_mode;
996 struct drm_display_mode *mode = NULL;
997
998 cmdline_mode = &fb_helper_conn->cmdline_mode;
999 if (cmdline_mode->specified == false)
1000 return mode;
1001
1002 /* attempt to find a matching mode in the list of modes
1003 * we have gotten so far, if not add a CVT mode that conforms
1004 */
1005 if (cmdline_mode->rb || cmdline_mode->margins)
1006 goto create_mode;
1007
1008 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1009 /* check width/height */
1010 if (mode->hdisplay != cmdline_mode->xres ||
1011 mode->vdisplay != cmdline_mode->yres)
1012 continue;
1013
1014 if (cmdline_mode->refresh_specified) {
1015 if (mode->vrefresh != cmdline_mode->refresh)
1016 continue;
1017 }
1018
1019 if (cmdline_mode->interlace) {
1020 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1021 continue;
1022 }
1023 return mode;
1024 }
1025
1026 create_mode:
1027 mode = drm_cvt_mode(fb_helper_conn->connector->dev, cmdline_mode->xres,
1028 cmdline_mode->yres,
1029 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1030 cmdline_mode->rb, cmdline_mode->interlace,
1031 cmdline_mode->margins);
1032 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1033 list_add(&mode->head, &fb_helper_conn->connector->modes);
1034 return mode;
1035 }
1036
1037 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1038 {
1039 bool enable;
1040
1041 if (strict) {
1042 enable = connector->status == connector_status_connected;
1043 } else {
1044 enable = connector->status != connector_status_disconnected;
1045 }
1046 return enable;
1047 }
1048
1049 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1050 bool *enabled)
1051 {
1052 bool any_enabled = false;
1053 struct drm_connector *connector;
1054 int i = 0;
1055
1056 for (i = 0; i < fb_helper->connector_count; i++) {
1057 connector = fb_helper->connector_info[i]->connector;
1058 enabled[i] = drm_connector_enabled(connector, true);
1059 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1060 enabled[i] ? "yes" : "no");
1061 any_enabled |= enabled[i];
1062 }
1063
1064 if (any_enabled)
1065 return;
1066
1067 for (i = 0; i < fb_helper->connector_count; i++) {
1068 connector = fb_helper->connector_info[i]->connector;
1069 enabled[i] = drm_connector_enabled(connector, false);
1070 }
1071 }
1072
1073 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1074 struct drm_display_mode **modes,
1075 bool *enabled, int width, int height)
1076 {
1077 struct drm_fb_helper_connector *fb_helper_conn;
1078 int i;
1079
1080 for (i = 0; i < fb_helper->connector_count; i++) {
1081 fb_helper_conn = fb_helper->connector_info[i];
1082
1083 if (enabled[i] == false)
1084 continue;
1085
1086 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1087 fb_helper_conn->connector->base.id);
1088
1089 /* got for command line mode first */
1090 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1091 if (!modes[i]) {
1092 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1093 fb_helper_conn->connector->base.id);
1094 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1095 }
1096 /* No preferred modes, pick one off the list */
1097 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1098 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1099 break;
1100 }
1101 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1102 "none");
1103 }
1104 return true;
1105 }
1106
1107 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1108 struct drm_fb_helper_crtc **best_crtcs,
1109 struct drm_display_mode **modes,
1110 int n, int width, int height)
1111 {
1112 int c, o;
1113 struct drm_device *dev = fb_helper->dev;
1114 struct drm_connector *connector;
1115 struct drm_connector_helper_funcs *connector_funcs;
1116 struct drm_encoder *encoder;
1117 struct drm_fb_helper_crtc *best_crtc;
1118 int my_score, best_score, score;
1119 struct drm_fb_helper_crtc **crtcs, *crtc;
1120 struct drm_fb_helper_connector *fb_helper_conn;
1121
1122 if (n == fb_helper->connector_count)
1123 return 0;
1124
1125 fb_helper_conn = fb_helper->connector_info[n];
1126 connector = fb_helper_conn->connector;
1127
1128 best_crtcs[n] = NULL;
1129 best_crtc = NULL;
1130 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1131 if (modes[n] == NULL)
1132 return best_score;
1133
1134 crtcs = kzalloc(dev->mode_config.num_connector *
1135 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1136 if (!crtcs)
1137 return best_score;
1138
1139 my_score = 1;
1140 if (connector->status == connector_status_connected)
1141 my_score++;
1142 if (drm_has_cmdline_mode(fb_helper_conn))
1143 my_score++;
1144 if (drm_has_preferred_mode(fb_helper_conn, width, height))
1145 my_score++;
1146
1147 connector_funcs = connector->helper_private;
1148 encoder = connector_funcs->best_encoder(connector);
1149 if (!encoder)
1150 goto out;
1151
1152 /* select a crtc for this connector and then attempt to configure
1153 remaining connectors */
1154 for (c = 0; c < fb_helper->crtc_count; c++) {
1155 crtc = &fb_helper->crtc_info[c];
1156
1157 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1158 continue;
1159 }
1160
1161 for (o = 0; o < n; o++)
1162 if (best_crtcs[o] == crtc)
1163 break;
1164
1165 if (o < n) {
1166 /* ignore cloning for now */
1167 continue;
1168 }
1169
1170 crtcs[n] = crtc;
1171 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1172 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1173 width, height);
1174 if (score > best_score) {
1175 best_crtc = crtc;
1176 best_score = score;
1177 memcpy(best_crtcs, crtcs,
1178 dev->mode_config.num_connector *
1179 sizeof(struct drm_fb_helper_crtc *));
1180 }
1181 }
1182 out:
1183 kfree(crtcs);
1184 return best_score;
1185 }
1186
1187 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1188 {
1189 struct drm_device *dev = fb_helper->dev;
1190 struct drm_fb_helper_crtc **crtcs;
1191 struct drm_display_mode **modes;
1192 struct drm_encoder *encoder;
1193 struct drm_mode_set *modeset;
1194 bool *enabled;
1195 int width, height;
1196 int i, ret;
1197
1198 DRM_DEBUG_KMS("\n");
1199
1200 width = dev->mode_config.max_width;
1201 height = dev->mode_config.max_height;
1202
1203 /* clean out all the encoder/crtc combos */
1204 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1205 encoder->crtc = NULL;
1206 }
1207
1208 crtcs = kcalloc(dev->mode_config.num_connector,
1209 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1210 modes = kcalloc(dev->mode_config.num_connector,
1211 sizeof(struct drm_display_mode *), GFP_KERNEL);
1212 enabled = kcalloc(dev->mode_config.num_connector,
1213 sizeof(bool), GFP_KERNEL);
1214
1215 drm_enable_connectors(fb_helper, enabled);
1216
1217 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1218 if (!ret)
1219 DRM_ERROR("Unable to find initial modes\n");
1220
1221 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1222
1223 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1224
1225 /* need to set the modesets up here for use later */
1226 /* fill out the connector<->crtc mappings into the modesets */
1227 for (i = 0; i < fb_helper->crtc_count; i++) {
1228 modeset = &fb_helper->crtc_info[i].mode_set;
1229 modeset->num_connectors = 0;
1230 }
1231
1232 for (i = 0; i < fb_helper->connector_count; i++) {
1233 struct drm_display_mode *mode = modes[i];
1234 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1235 modeset = &fb_crtc->mode_set;
1236
1237 if (mode && fb_crtc) {
1238 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1239 mode->name, fb_crtc->mode_set.crtc->base.id);
1240 fb_crtc->desired_mode = mode;
1241 if (modeset->mode)
1242 drm_mode_destroy(dev, modeset->mode);
1243 modeset->mode = drm_mode_duplicate(dev,
1244 fb_crtc->desired_mode);
1245 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1246 }
1247 }
1248
1249 kfree(crtcs);
1250 kfree(modes);
1251 kfree(enabled);
1252 }
1253
1254 /**
1255 * drm_helper_initial_config - setup a sane initial connector configuration
1256 * @dev: DRM device
1257 *
1258 * LOCKING:
1259 * Called at init time, must take mode config lock.
1260 *
1261 * Scan the CRTCs and connectors and try to put together an initial setup.
1262 * At the moment, this is a cloned configuration across all heads with
1263 * a new framebuffer object as the backing store.
1264 *
1265 * RETURNS:
1266 * Zero if everything went ok, nonzero otherwise.
1267 */
1268 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1269 {
1270 struct drm_device *dev = fb_helper->dev;
1271 int count = 0;
1272
1273 /* disable all the possible outputs/crtcs before entering KMS mode */
1274 drm_helper_disable_unused_functions(fb_helper->dev);
1275
1276 drm_fb_helper_parse_command_line(fb_helper);
1277
1278 count = drm_fb_helper_probe_connector_modes(fb_helper,
1279 dev->mode_config.max_width,
1280 dev->mode_config.max_height);
1281 /*
1282 * we shouldn't end up with no modes here.
1283 */
1284 if (count == 0) {
1285 printk(KERN_INFO "No connectors reported connected with modes\n");
1286 }
1287 drm_setup_crtcs(fb_helper);
1288
1289 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1290 }
1291 EXPORT_SYMBOL(drm_fb_helper_initial_config);
1292
1293 bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1294 {
1295 int count = 0;
1296 u32 max_width, max_height, bpp_sel;
1297 bool bound = false, crtcs_bound = false;
1298 struct drm_crtc *crtc;
1299
1300 if (!fb_helper->fb)
1301 return false;
1302
1303 list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) {
1304 if (crtc->fb)
1305 crtcs_bound = true;
1306 if (crtc->fb == fb_helper->fb)
1307 bound = true;
1308 }
1309
1310 if (!bound && crtcs_bound) {
1311 fb_helper->delayed_hotplug = true;
1312 return false;
1313 }
1314 DRM_DEBUG_KMS("\n");
1315
1316 max_width = fb_helper->fb->width;
1317 max_height = fb_helper->fb->height;
1318 bpp_sel = fb_helper->fb->bits_per_pixel;
1319
1320 count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1321 max_height);
1322 drm_setup_crtcs(fb_helper);
1323
1324 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1325 }
1326 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
1327
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