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